diff options
Diffstat (limited to 'src/libhydra')
41 files changed, 0 insertions, 19500 deletions
diff --git a/src/libhydra/Android.mk b/src/libhydra/Android.mk deleted file mode 100644 index 7b62e9529..000000000 --- a/src/libhydra/Android.mk +++ /dev/null @@ -1,37 +0,0 @@ -LOCAL_PATH := $(call my-dir) -include $(CLEAR_VARS) - -# copy-n-paste from Makefile.am -libhydra_la_SOURCES := \ -hydra.c hydra.h \ -kernel/kernel_interface.c kernel/kernel_interface.h \ -kernel/kernel_ipsec.c kernel/kernel_ipsec.h \ -kernel/kernel_net.c kernel/kernel_net.h \ -kernel/kernel_listener.h - -LOCAL_SRC_FILES := $(filter %.c,$(libhydra_la_SOURCES)) - -# adding the plugin source files - -LOCAL_SRC_FILES += $(call add_plugin, kernel-pfkey) - -LOCAL_SRC_FILES += $(call add_plugin, kernel-netlink) - -# build libhydra --------------------------------------------------------------- - -LOCAL_C_INCLUDES += \ - $(strongswan_PATH)/src/libstrongswan - -LOCAL_CFLAGS := $(strongswan_CFLAGS) - -LOCAL_MODULE := libhydra - -LOCAL_MODULE_TAGS := optional - -LOCAL_ARM_MODE := arm - -LOCAL_PRELINK_MODULE := false - -LOCAL_SHARED_LIBRARIES += libstrongswan - -include $(BUILD_SHARED_LIBRARY) diff --git a/src/libhydra/Makefile.am b/src/libhydra/Makefile.am deleted file mode 100644 index 9cdbc0147..000000000 --- a/src/libhydra/Makefile.am +++ /dev/null @@ -1,60 +0,0 @@ -ipseclib_LTLIBRARIES = libhydra.la - -libhydra_la_SOURCES = \ -hydra.c hydra.h \ -kernel/kernel_interface.c kernel/kernel_interface.h \ -kernel/kernel_ipsec.c kernel/kernel_ipsec.h \ -kernel/kernel_net.c kernel/kernel_net.h \ -kernel/kernel_listener.h - -libhydra_la_LIBADD = \ - $(top_builddir)/src/libstrongswan/libstrongswan.la - -if USE_WINDOWS - libhydra_la_LIBADD += -lws2_32 -endif - -AM_CPPFLAGS = \ - -I$(top_srcdir)/src/libstrongswan \ - -DIPSEC_DIR=\"${ipsecdir}\" \ - -DPLUGINDIR=\"${plugindir}\" - -AM_LDFLAGS = \ - -no-undefined - -EXTRA_DIST = Android.mk - -# build optional plugins -######################## - -if MONOLITHIC -SUBDIRS = -else -SUBDIRS = . -endif - -if USE_KERNEL_PFKEY - SUBDIRS += plugins/kernel_pfkey -if MONOLITHIC - libhydra_la_LIBADD += plugins/kernel_pfkey/libstrongswan-kernel-pfkey.la -endif -endif - -if USE_KERNEL_PFROUTE - SUBDIRS += plugins/kernel_pfroute -if MONOLITHIC - libhydra_la_LIBADD += plugins/kernel_pfroute/libstrongswan-kernel-pfroute.la -endif -endif - -if USE_KERNEL_NETLINK - SUBDIRS += plugins/kernel_netlink -if MONOLITHIC - libhydra_la_LIBADD += plugins/kernel_netlink/libstrongswan-kernel-netlink.la -endif -endif - -if MONOLITHIC - SUBDIRS += . -endif -SUBDIRS += tests diff --git a/src/libhydra/Makefile.in b/src/libhydra/Makefile.in deleted file mode 100644 index 9bb2e839a..000000000 --- a/src/libhydra/Makefile.in +++ /dev/null @@ -1,922 +0,0 @@ -# Makefile.in generated by automake 1.14.1 from Makefile.am. -# @configure_input@ - -# Copyright (C) 1994-2013 Free Software Foundation, Inc. - -# This Makefile.in is free software; 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See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -#include "hydra.h" - -#include <utils/debug.h> - -typedef struct private_hydra_t private_hydra_t; - -/** - * Private additions to hydra_t. - */ -struct private_hydra_t { - - /** - * Public members of hydra_t. - */ - hydra_t public; - - /** - * Integrity check failed? - */ - bool integrity_failed; - - /** - * Number of times we have been initialized - */ - refcount_t ref; -}; - -/** - * Single instance of hydra_t. - */ -hydra_t *hydra = NULL; - -/** - * Described in header. - */ -void libhydra_deinit() -{ - private_hydra_t *this = (private_hydra_t*)hydra; - - if (!this || !ref_put(&this->ref)) - { /* have more users */ - return; - } - - this->public.kernel_interface->destroy(this->public.kernel_interface); - free(this); - hydra = NULL; -} - -/** - * Described in header. - */ -bool libhydra_init() -{ - private_hydra_t *this; - - if (hydra) - { /* already initialized, increase refcount */ - this = (private_hydra_t*)hydra; - ref_get(&this->ref); - return !this->integrity_failed; - } - - INIT(this, - .ref = 1, - ); - hydra = &this->public; - - this->public.kernel_interface = kernel_interface_create(); - - if (lib->integrity && - !lib->integrity->check(lib->integrity, "libhydra", libhydra_init)) - { - DBG1(DBG_LIB, "integrity check of libhydra failed"); - this->integrity_failed = TRUE; - } - return !this->integrity_failed; -} diff --git a/src/libhydra/hydra.h b/src/libhydra/hydra.h deleted file mode 100644 index b23a30584..000000000 --- a/src/libhydra/hydra.h +++ /dev/null @@ -1,71 +0,0 @@ -/* - * Copyright (C) 2010 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -/** - * @defgroup libhydra libhydra - * - * @defgroup hkernel kernel - * @ingroup libhydra - * - * @defgroup hplugins plugins - * @ingroup libhydra - * - * @addtogroup libhydra - * @{ - */ - -#ifndef HYDRA_H_ -#define HYDRA_H_ - -typedef struct hydra_t hydra_t; - -#include <kernel/kernel_interface.h> - -#include <library.h> - -/** - * IKE Daemon support object. - */ -struct hydra_t { - - /** - * kernel interface to communicate with kernel - */ - kernel_interface_t *kernel_interface; -}; - -/** - * The single instance of hydra_t. - * - * Set between calls to libhydra_init() and libhydra_deinit() calls. - */ -extern hydra_t *hydra; - -/** - * Initialize libhydra. - * - * libhydra_init() may be called multiple times in a single process, but each - * caller must call libhydra_deinit() for each call to libhydra_init(). - * - * @return FALSE if integrity check failed - */ -bool libhydra_init(); - -/** - * Deinitialize libhydra. - */ -void libhydra_deinit(); - -#endif /** HYDRA_H_ @}*/ diff --git a/src/libhydra/kernel/kernel_interface.c b/src/libhydra/kernel/kernel_interface.c deleted file mode 100644 index 89e95ade9..000000000 --- a/src/libhydra/kernel/kernel_interface.c +++ /dev/null @@ -1,1086 +0,0 @@ -/* - * Copyright (C) 2008-2015 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * Copyright (C) 2010 Martin Willi - * Copyright (C) 2010 revosec AG - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -/* - * Copyright (c) 2012 Nanoteq Pty Ltd - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#include "kernel_interface.h" - -#include <hydra.h> -#include <utils/debug.h> -#include <threading/mutex.h> -#include <collections/linked_list.h> -#include <collections/hashtable.h> -#include <collections/array.h> - -typedef struct private_kernel_interface_t private_kernel_interface_t; - -typedef struct kernel_algorithm_t kernel_algorithm_t; - -/** - * Mapping of IKE algorithms to kernel-specific algorithm identifiers - */ -struct kernel_algorithm_t { - - /** - * Transform type of the algorithm - */ - transform_type_t type; - - /** - * Identifier specified in IKE - */ - u_int16_t ike; - - /** - * Identifier as defined in pfkeyv2.h - */ - u_int16_t kernel; - - /** - * Name of the algorithm in linux crypto API - */ - char *name; -}; - -/** - * Private data of a kernel_interface_t object. - */ -struct private_kernel_interface_t { - - /** - * Public part of kernel_interface_t object. - */ - kernel_interface_t public; - - /** - * Registered IPsec constructor - */ - kernel_ipsec_constructor_t ipsec_constructor; - - /** - * Registered net constructor - */ - kernel_net_constructor_t net_constructor; - - /** - * ipsec interface - */ - kernel_ipsec_t *ipsec; - - /** - * network interface - */ - kernel_net_t *net; - - /** - * mutex for listeners - */ - mutex_t *mutex; - - /** - * list of registered listeners - */ - linked_list_t *listeners; - - /** - * Reqid entries indexed by reqids - */ - hashtable_t *reqids; - - /** - * Reqid entries indexed by traffic selectors - */ - hashtable_t *reqids_by_ts; - - /** - * mutex for algorithm mappings - */ - mutex_t *mutex_algs; - - /** - * List of algorithm mappings (kernel_algorithm_t*) - */ - linked_list_t *algorithms; - - /** - * List of interface names to include or exclude (char*), NULL if interfaces - * are not filtered - */ - linked_list_t *ifaces_filter; - - /** - * TRUE to exclude interfaces listed in ifaces_filter, FALSE to consider - * only those listed there - */ - bool ifaces_exclude; -}; - -METHOD(kernel_interface_t, get_features, kernel_feature_t, - private_kernel_interface_t *this) -{ - kernel_feature_t features = 0; - - if (this->ipsec && this->ipsec->get_features) - { - features |= this->ipsec->get_features(this->ipsec); - } - if (this->net && this->net->get_features) - { - features |= this->net->get_features(this->net); - } - return features; -} - -METHOD(kernel_interface_t, get_spi, status_t, - private_kernel_interface_t *this, host_t *src, host_t *dst, - u_int8_t protocol, u_int32_t *spi) -{ - if (!this->ipsec) - { - return NOT_SUPPORTED; - } - return this->ipsec->get_spi(this->ipsec, src, dst, protocol, spi); -} - -METHOD(kernel_interface_t, get_cpi, status_t, - private_kernel_interface_t *this, host_t *src, host_t *dst, - u_int16_t *cpi) -{ - if (!this->ipsec) - { - return NOT_SUPPORTED; - } - return this->ipsec->get_cpi(this->ipsec, src, dst, cpi); -} - -/** - * Reqid mapping entry - */ -typedef struct { - /** allocated reqid */ - u_int32_t reqid; - /** references to this entry */ - u_int refs; - /** inbound mark used for SA */ - mark_t mark_in; - /** outbound mark used for SA */ - mark_t mark_out; - /** local traffic selectors */ - array_t *local; - /** remote traffic selectors */ - array_t *remote; -} reqid_entry_t; - -/** - * Destroy a reqid mapping entry - */ -static void reqid_entry_destroy(reqid_entry_t *entry) -{ - array_destroy_offset(entry->local, offsetof(traffic_selector_t, destroy)); - array_destroy_offset(entry->remote, offsetof(traffic_selector_t, destroy)); - free(entry); -} - -/** - * Hashtable hash function for reqid entries using reqid as key - */ -static u_int hash_reqid(reqid_entry_t *entry) -{ - return chunk_hash_inc(chunk_from_thing(entry->reqid), - chunk_hash_inc(chunk_from_thing(entry->mark_in), - chunk_hash(chunk_from_thing(entry->mark_out)))); -} - -/** - * Hashtable equals function for reqid entries using reqid as key - */ -static bool equals_reqid(reqid_entry_t *a, reqid_entry_t *b) -{ - return a->reqid == b->reqid && - a->mark_in.value == b->mark_in.value && - a->mark_in.mask == b->mark_in.mask && - a->mark_out.value == b->mark_out.value && - a->mark_out.mask == b->mark_out.mask; -} - -/** - * Hash an array of traffic selectors - */ -static u_int hash_ts_array(array_t *array, u_int hash) -{ - enumerator_t *enumerator; - traffic_selector_t *ts; - - enumerator = array_create_enumerator(array); - while (enumerator->enumerate(enumerator, &ts)) - { - hash = ts->hash(ts, hash); - } - enumerator->destroy(enumerator); - - return hash; -} - -/** - * Hashtable hash function for reqid entries using traffic selectors as key - */ -static u_int hash_reqid_by_ts(reqid_entry_t *entry) -{ - return hash_ts_array(entry->local, hash_ts_array(entry->remote, - chunk_hash_inc(chunk_from_thing(entry->mark_in), - chunk_hash(chunk_from_thing(entry->mark_out))))); -} - -/** - * Compare two array with traffic selectors for equality - */ -static bool ts_array_equals(array_t *a, array_t *b) -{ - traffic_selector_t *tsa, *tsb; - enumerator_t *ae, *be; - bool equal = TRUE; - - if (array_count(a) != array_count(b)) - { - return FALSE; - } - - ae = array_create_enumerator(a); - be = array_create_enumerator(b); - while (equal && ae->enumerate(ae, &tsa) && be->enumerate(be, &tsb)) - { - equal = tsa->equals(tsa, tsb); - } - ae->destroy(ae); - be->destroy(be); - - return equal; -} - -/** - * Hashtable equals function for reqid entries using traffic selectors as key - */ -static bool equals_reqid_by_ts(reqid_entry_t *a, reqid_entry_t *b) -{ - return ts_array_equals(a->local, b->local) && - ts_array_equals(a->remote, b->remote) && - a->mark_in.value == b->mark_in.value && - a->mark_in.mask == b->mark_in.mask && - a->mark_out.value == b->mark_out.value && - a->mark_out.mask == b->mark_out.mask; -} - -/** - * Create an array from copied traffic selector list items - */ -static array_t *array_from_ts_list(linked_list_t *list) -{ - enumerator_t *enumerator; - traffic_selector_t *ts; - array_t *array; - - array = array_create(0, 0); - - enumerator = list->create_enumerator(list); - while (enumerator->enumerate(enumerator, &ts)) - { - array_insert(array, ARRAY_TAIL, ts->clone(ts)); - } - enumerator->destroy(enumerator); - - return array; -} - -METHOD(kernel_interface_t, alloc_reqid, status_t, - private_kernel_interface_t *this, - linked_list_t *local_ts, linked_list_t *remote_ts, - mark_t mark_in, mark_t mark_out, u_int32_t *reqid) -{ - static u_int32_t counter = 0; - reqid_entry_t *entry = NULL, *tmpl; - status_t status = SUCCESS; - - INIT(tmpl, - .local = array_from_ts_list(local_ts), - .remote = array_from_ts_list(remote_ts), - .mark_in = mark_in, - .mark_out = mark_out, - .reqid = *reqid, - ); - - this->mutex->lock(this->mutex); - if (tmpl->reqid) - { - /* search by reqid if given */ - entry = this->reqids->get(this->reqids, tmpl); - } - if (entry) - { - /* we don't require a traffic selector match for explicit reqids, - * as we wan't to reuse a reqid for trap-triggered policies that - * got narrowed during negotiation. */ - reqid_entry_destroy(tmpl); - } - else - { - /* search by traffic selectors */ - entry = this->reqids_by_ts->get(this->reqids_by_ts, tmpl); - if (entry) - { - reqid_entry_destroy(tmpl); - } - else - { - /* none found, create a new entry, allocating a reqid */ - entry = tmpl; - entry->reqid = ++counter; - this->reqids_by_ts->put(this->reqids_by_ts, entry, entry); - this->reqids->put(this->reqids, entry, entry); - } - *reqid = entry->reqid; - } - entry->refs++; - this->mutex->unlock(this->mutex); - - return status; -} - -METHOD(kernel_interface_t, release_reqid, status_t, - private_kernel_interface_t *this, u_int32_t reqid, - mark_t mark_in, mark_t mark_out) -{ - reqid_entry_t *entry, tmpl = { - .reqid = reqid, - .mark_in = mark_in, - .mark_out = mark_out, - }; - - this->mutex->lock(this->mutex); - entry = this->reqids->remove(this->reqids, &tmpl); - if (entry) - { - if (--entry->refs == 0) - { - entry = this->reqids_by_ts->remove(this->reqids_by_ts, entry); - if (entry) - { - reqid_entry_destroy(entry); - } - } - else - { - this->reqids->put(this->reqids, entry, entry); - } - } - this->mutex->unlock(this->mutex); - - if (entry) - { - return SUCCESS; - } - return NOT_FOUND; -} - -METHOD(kernel_interface_t, add_sa, status_t, - private_kernel_interface_t *this, host_t *src, host_t *dst, - u_int32_t spi, u_int8_t protocol, u_int32_t reqid, mark_t mark, - u_int32_t tfc, lifetime_cfg_t *lifetime, u_int16_t enc_alg, chunk_t enc_key, - u_int16_t int_alg, chunk_t int_key, ipsec_mode_t mode, - u_int16_t ipcomp, u_int16_t cpi, u_int32_t replay_window, - bool initiator, bool encap, bool esn, bool inbound, bool update, - linked_list_t *src_ts, linked_list_t *dst_ts) -{ - if (!this->ipsec) - { - return NOT_SUPPORTED; - } - return this->ipsec->add_sa(this->ipsec, src, dst, spi, protocol, reqid, - mark, tfc, lifetime, enc_alg, enc_key, int_alg, int_key, mode, - ipcomp, cpi, replay_window, initiator, encap, esn, inbound, - update, src_ts, dst_ts); -} - -METHOD(kernel_interface_t, update_sa, status_t, - private_kernel_interface_t *this, u_int32_t spi, u_int8_t protocol, - u_int16_t cpi, host_t *src, host_t *dst, host_t *new_src, host_t *new_dst, - bool encap, bool new_encap, mark_t mark) -{ - if (!this->ipsec) - { - return NOT_SUPPORTED; - } - return this->ipsec->update_sa(this->ipsec, spi, protocol, cpi, src, dst, - new_src, new_dst, encap, new_encap, mark); -} - -METHOD(kernel_interface_t, query_sa, status_t, - private_kernel_interface_t *this, host_t *src, host_t *dst, - u_int32_t spi, u_int8_t protocol, mark_t mark, - u_int64_t *bytes, u_int64_t *packets, time_t *time) -{ - if (!this->ipsec) - { - return NOT_SUPPORTED; - } - return this->ipsec->query_sa(this->ipsec, src, dst, spi, protocol, mark, - bytes, packets, time); -} - -METHOD(kernel_interface_t, del_sa, status_t, - private_kernel_interface_t *this, host_t *src, host_t *dst, u_int32_t spi, - u_int8_t protocol, u_int16_t cpi, mark_t mark) -{ - if (!this->ipsec) - { - return NOT_SUPPORTED; - } - return this->ipsec->del_sa(this->ipsec, src, dst, spi, protocol, cpi, mark); -} - -METHOD(kernel_interface_t, flush_sas, status_t, - private_kernel_interface_t *this) -{ - if (!this->ipsec) - { - return NOT_SUPPORTED; - } - return this->ipsec->flush_sas(this->ipsec); -} - -METHOD(kernel_interface_t, add_policy, status_t, - private_kernel_interface_t *this, host_t *src, host_t *dst, - traffic_selector_t *src_ts, traffic_selector_t *dst_ts, - policy_dir_t direction, policy_type_t type, ipsec_sa_cfg_t *sa, - mark_t mark, policy_priority_t priority) -{ - if (!this->ipsec) - { - return NOT_SUPPORTED; - } - return this->ipsec->add_policy(this->ipsec, src, dst, src_ts, dst_ts, - direction, type, sa, mark, priority); -} - -METHOD(kernel_interface_t, query_policy, status_t, - private_kernel_interface_t *this, traffic_selector_t *src_ts, - traffic_selector_t *dst_ts, policy_dir_t direction, mark_t mark, - time_t *use_time) -{ - if (!this->ipsec) - { - return NOT_SUPPORTED; - } - return this->ipsec->query_policy(this->ipsec, src_ts, dst_ts, - direction, mark, use_time); -} - -METHOD(kernel_interface_t, del_policy, status_t, - private_kernel_interface_t *this, host_t *src, host_t *dst, - traffic_selector_t *src_ts, traffic_selector_t *dst_ts, - policy_dir_t direction, policy_type_t type, ipsec_sa_cfg_t *sa, - mark_t mark, policy_priority_t priority) -{ - if (!this->ipsec) - { - return NOT_SUPPORTED; - } - return this->ipsec->del_policy(this->ipsec, src, dst, src_ts, dst_ts, - direction, type, sa, mark, priority); -} - -METHOD(kernel_interface_t, flush_policies, status_t, - private_kernel_interface_t *this) -{ - if (!this->ipsec) - { - return NOT_SUPPORTED; - } - return this->ipsec->flush_policies(this->ipsec); -} - -METHOD(kernel_interface_t, get_source_addr, host_t*, - private_kernel_interface_t *this, host_t *dest, host_t *src) -{ - if (!this->net) - { - return NULL; - } - return this->net->get_source_addr(this->net, dest, src); -} - -METHOD(kernel_interface_t, get_nexthop, host_t*, - private_kernel_interface_t *this, host_t *dest, int prefix, host_t *src) -{ - if (!this->net) - { - return NULL; - } - return this->net->get_nexthop(this->net, dest, prefix, src); -} - -METHOD(kernel_interface_t, get_interface, bool, - private_kernel_interface_t *this, host_t *host, char **name) -{ - if (!this->net) - { - return NULL; - } - return this->net->get_interface(this->net, host, name); -} - -METHOD(kernel_interface_t, create_address_enumerator, enumerator_t*, - private_kernel_interface_t *this, kernel_address_type_t which) -{ - if (!this->net) - { - return enumerator_create_empty(); - } - return this->net->create_address_enumerator(this->net, which); -} - -METHOD(kernel_interface_t, add_ip, status_t, - private_kernel_interface_t *this, host_t *virtual_ip, int prefix, - char *iface) -{ - if (!this->net) - { - return NOT_SUPPORTED; - } - return this->net->add_ip(this->net, virtual_ip, prefix, iface); -} - -METHOD(kernel_interface_t, del_ip, status_t, - private_kernel_interface_t *this, host_t *virtual_ip, int prefix, bool wait) -{ - if (!this->net) - { - return NOT_SUPPORTED; - } - return this->net->del_ip(this->net, virtual_ip, prefix, wait); -} - -METHOD(kernel_interface_t, add_route, status_t, - private_kernel_interface_t *this, chunk_t dst_net, - u_int8_t prefixlen, host_t *gateway, host_t *src_ip, char *if_name) -{ - if (!this->net) - { - return NOT_SUPPORTED; - } - return this->net->add_route(this->net, dst_net, prefixlen, gateway, - src_ip, if_name); -} - -METHOD(kernel_interface_t, del_route, status_t, - private_kernel_interface_t *this, chunk_t dst_net, - u_int8_t prefixlen, host_t *gateway, host_t *src_ip, char *if_name) -{ - if (!this->net) - { - return NOT_SUPPORTED; - } - return this->net->del_route(this->net, dst_net, prefixlen, gateway, - src_ip, if_name); -} - -METHOD(kernel_interface_t, bypass_socket, bool, - private_kernel_interface_t *this, int fd, int family) -{ - if (!this->ipsec) - { - return FALSE; - } - return this->ipsec->bypass_socket(this->ipsec, fd, family); -} - -METHOD(kernel_interface_t, enable_udp_decap, bool, - private_kernel_interface_t *this, int fd, int family, u_int16_t port) -{ - if (!this->ipsec) - { - return FALSE; - } - return this->ipsec->enable_udp_decap(this->ipsec, fd, family, port); -} - -METHOD(kernel_interface_t, is_interface_usable, bool, - private_kernel_interface_t *this, const char *iface) -{ - status_t expected; - - if (!this->ifaces_filter) - { - return TRUE; - } - expected = this->ifaces_exclude ? NOT_FOUND : SUCCESS; - return this->ifaces_filter->find_first(this->ifaces_filter, (void*)streq, - NULL, iface) == expected; -} - -METHOD(kernel_interface_t, all_interfaces_usable, bool, - private_kernel_interface_t *this) -{ - return this->ifaces_filter == NULL; -} - -METHOD(kernel_interface_t, get_address_by_ts, status_t, - private_kernel_interface_t *this, traffic_selector_t *ts, - host_t **ip, bool *vip) -{ - enumerator_t *addrs; - host_t *host; - int family; - bool found = FALSE; - - DBG2(DBG_KNL, "getting a local address in traffic selector %R", ts); - - /* if we have a family which includes localhost, we do not - * search for an IP, we use the default */ - family = ts->get_type(ts) == TS_IPV4_ADDR_RANGE ? AF_INET : AF_INET6; - - if (family == AF_INET) - { - host = host_create_from_string("127.0.0.1", 0); - } - else - { - host = host_create_from_string("::1", 0); - } - - if (ts->includes(ts, host)) - { - *ip = host_create_any(family); - host->destroy(host); - DBG2(DBG_KNL, "using host %H", *ip); - return SUCCESS; - } - host->destroy(host); - - /* try virtual IPs only first (on all interfaces) */ - addrs = create_address_enumerator(this, - ADDR_TYPE_ALL ^ ADDR_TYPE_REGULAR); - while (addrs->enumerate(addrs, (void**)&host)) - { - if (ts->includes(ts, host)) - { - found = TRUE; - *ip = host->clone(host); - if (vip) - { - *vip = TRUE; - } - break; - } - } - addrs->destroy(addrs); - - if (!found) - { /* then try the regular addresses (on all interfaces) */ - addrs = create_address_enumerator(this, - ADDR_TYPE_ALL ^ ADDR_TYPE_VIRTUAL); - while (addrs->enumerate(addrs, (void**)&host)) - { - if (ts->includes(ts, host)) - { - found = TRUE; - *ip = host->clone(host); - if (vip) - { - *vip = FALSE; - } - break; - } - } - addrs->destroy(addrs); - } - - if (!found) - { - DBG2(DBG_KNL, "no local address found in traffic selector %R", ts); - return FAILED; - } - - DBG2(DBG_KNL, "using host %H", *ip); - return SUCCESS; -} - - -METHOD(kernel_interface_t, add_ipsec_interface, bool, - private_kernel_interface_t *this, kernel_ipsec_constructor_t constructor) -{ - if (!this->ipsec) - { - this->ipsec_constructor = constructor; - this->ipsec = constructor(); - return this->ipsec != NULL; - } - return FALSE; -} - -METHOD(kernel_interface_t, remove_ipsec_interface, bool, - private_kernel_interface_t *this, kernel_ipsec_constructor_t constructor) -{ - if (constructor == this->ipsec_constructor && this->ipsec) - { - this->ipsec->destroy(this->ipsec); - this->ipsec = NULL; - return TRUE; - } - return FALSE; -} - -METHOD(kernel_interface_t, add_net_interface, bool, - private_kernel_interface_t *this, kernel_net_constructor_t constructor) -{ - if (!this->net) - { - this->net_constructor = constructor; - this->net = constructor(); - return this->net != NULL; - } - return FALSE; -} - -METHOD(kernel_interface_t, remove_net_interface, bool, - private_kernel_interface_t *this, kernel_net_constructor_t constructor) -{ - if (constructor == this->net_constructor && this->net) - { - this->net->destroy(this->net); - this->net = NULL; - return TRUE; - } - return FALSE; -} - -METHOD(kernel_interface_t, add_listener, void, - private_kernel_interface_t *this, kernel_listener_t *listener) -{ - this->mutex->lock(this->mutex); - this->listeners->insert_last(this->listeners, listener); - this->mutex->unlock(this->mutex); -} - -METHOD(kernel_interface_t, remove_listener, void, - private_kernel_interface_t *this, kernel_listener_t *listener) -{ - this->mutex->lock(this->mutex); - this->listeners->remove(this->listeners, listener, NULL); - this->mutex->unlock(this->mutex); -} - -METHOD(kernel_interface_t, acquire, void, - private_kernel_interface_t *this, u_int32_t reqid, - traffic_selector_t *src_ts, traffic_selector_t *dst_ts) -{ - kernel_listener_t *listener; - enumerator_t *enumerator; - this->mutex->lock(this->mutex); - enumerator = this->listeners->create_enumerator(this->listeners); - while (enumerator->enumerate(enumerator, &listener)) - { - if (listener->acquire && - !listener->acquire(listener, reqid, src_ts, dst_ts)) - { - this->listeners->remove_at(this->listeners, enumerator); - } - } - enumerator->destroy(enumerator); - this->mutex->unlock(this->mutex); -} - -METHOD(kernel_interface_t, expire, void, - private_kernel_interface_t *this, u_int8_t protocol, u_int32_t spi, - host_t *dst, bool hard) -{ - kernel_listener_t *listener; - enumerator_t *enumerator; - - this->mutex->lock(this->mutex); - enumerator = this->listeners->create_enumerator(this->listeners); - while (enumerator->enumerate(enumerator, &listener)) - { - if (listener->expire && - !listener->expire(listener, protocol, spi, dst, hard)) - { - this->listeners->remove_at(this->listeners, enumerator); - } - } - enumerator->destroy(enumerator); - this->mutex->unlock(this->mutex); -} - -METHOD(kernel_interface_t, mapping, void, - private_kernel_interface_t *this, u_int8_t protocol, u_int32_t spi, - host_t *dst, host_t *remote) -{ - kernel_listener_t *listener; - enumerator_t *enumerator; - - this->mutex->lock(this->mutex); - enumerator = this->listeners->create_enumerator(this->listeners); - while (enumerator->enumerate(enumerator, &listener)) - { - if (listener->mapping && - !listener->mapping(listener, protocol, spi, dst, remote)) - { - this->listeners->remove_at(this->listeners, enumerator); - } - } - enumerator->destroy(enumerator); - this->mutex->unlock(this->mutex); -} - -METHOD(kernel_interface_t, migrate, void, - private_kernel_interface_t *this, u_int32_t reqid, - traffic_selector_t *src_ts, traffic_selector_t *dst_ts, - policy_dir_t direction, host_t *local, host_t *remote) -{ - kernel_listener_t *listener; - enumerator_t *enumerator; - this->mutex->lock(this->mutex); - enumerator = this->listeners->create_enumerator(this->listeners); - while (enumerator->enumerate(enumerator, &listener)) - { - if (listener->migrate && - !listener->migrate(listener, reqid, src_ts, dst_ts, direction, - local, remote)) - { - this->listeners->remove_at(this->listeners, enumerator); - } - } - enumerator->destroy(enumerator); - this->mutex->unlock(this->mutex); -} - -static bool call_roam(kernel_listener_t *listener, bool *roam) -{ - return listener->roam && !listener->roam(listener, *roam); -} - -METHOD(kernel_interface_t, roam, void, - private_kernel_interface_t *this, bool address) -{ - this->mutex->lock(this->mutex); - this->listeners->remove(this->listeners, &address, (void*)call_roam); - this->mutex->unlock(this->mutex); -} - -METHOD(kernel_interface_t, tun, void, - private_kernel_interface_t *this, tun_device_t *tun, bool created) -{ - kernel_listener_t *listener; - enumerator_t *enumerator; - this->mutex->lock(this->mutex); - enumerator = this->listeners->create_enumerator(this->listeners); - while (enumerator->enumerate(enumerator, &listener)) - { - if (listener->tun && - !listener->tun(listener, tun, created)) - { - this->listeners->remove_at(this->listeners, enumerator); - } - } - enumerator->destroy(enumerator); - this->mutex->unlock(this->mutex); -} - -METHOD(kernel_interface_t, register_algorithm, void, - private_kernel_interface_t *this, u_int16_t alg_id, transform_type_t type, - u_int16_t kernel_id, char *kernel_name) -{ - kernel_algorithm_t *algorithm; - - INIT(algorithm, - .type = type, - .ike = alg_id, - .kernel = kernel_id, - .name = strdup(kernel_name), - ); - - this->mutex_algs->lock(this->mutex_algs); - this->algorithms->insert_first(this->algorithms, algorithm); - this->mutex_algs->unlock(this->mutex_algs); -} - -METHOD(kernel_interface_t, lookup_algorithm, bool, - private_kernel_interface_t *this, u_int16_t alg_id, transform_type_t type, - u_int16_t *kernel_id, char **kernel_name) -{ - kernel_algorithm_t *algorithm; - enumerator_t *enumerator; - bool found = FALSE; - - this->mutex_algs->lock(this->mutex_algs); - enumerator = this->algorithms->create_enumerator(this->algorithms); - while (enumerator->enumerate(enumerator, &algorithm)) - { - if (algorithm->type == type && algorithm->ike == alg_id) - { - if (kernel_id) - { - *kernel_id = algorithm->kernel; - } - if (kernel_name) - { - *kernel_name = algorithm->name; - } - found = TRUE; - break; - } - } - enumerator->destroy(enumerator); - this->mutex_algs->unlock(this->mutex_algs); - return found; -} - -METHOD(kernel_interface_t, destroy, void, - private_kernel_interface_t *this) -{ - kernel_algorithm_t *algorithm; - - while (this->algorithms->remove_first(this->algorithms, - (void**)&algorithm) == SUCCESS) - { - free(algorithm->name); - free(algorithm); - } - this->algorithms->destroy(this->algorithms); - this->mutex_algs->destroy(this->mutex_algs); - DESTROY_IF(this->ipsec); - DESTROY_IF(this->net); - DESTROY_FUNCTION_IF(this->ifaces_filter, (void*)free); - this->reqids->destroy(this->reqids); - this->reqids_by_ts->destroy(this->reqids_by_ts); - this->listeners->destroy(this->listeners); - this->mutex->destroy(this->mutex); - free(this); -} - -/* - * Described in header-file - */ -kernel_interface_t *kernel_interface_create() -{ - private_kernel_interface_t *this; - char *ifaces; - - INIT(this, - .public = { - .get_features = _get_features, - .get_spi = _get_spi, - .get_cpi = _get_cpi, - .alloc_reqid = _alloc_reqid, - .release_reqid = _release_reqid, - .add_sa = _add_sa, - .update_sa = _update_sa, - .query_sa = _query_sa, - .del_sa = _del_sa, - .flush_sas = _flush_sas, - .add_policy = _add_policy, - .query_policy = _query_policy, - .del_policy = _del_policy, - .flush_policies = _flush_policies, - .get_source_addr = _get_source_addr, - .get_nexthop = _get_nexthop, - .get_interface = _get_interface, - .create_address_enumerator = _create_address_enumerator, - .add_ip = _add_ip, - .del_ip = _del_ip, - .add_route = _add_route, - .del_route = _del_route, - .bypass_socket = _bypass_socket, - .enable_udp_decap = _enable_udp_decap, - - .is_interface_usable = _is_interface_usable, - .all_interfaces_usable = _all_interfaces_usable, - .get_address_by_ts = _get_address_by_ts, - .add_ipsec_interface = _add_ipsec_interface, - .remove_ipsec_interface = _remove_ipsec_interface, - .add_net_interface = _add_net_interface, - .remove_net_interface = _remove_net_interface, - - .add_listener = _add_listener, - .remove_listener = _remove_listener, - .register_algorithm = _register_algorithm, - .lookup_algorithm = _lookup_algorithm, - .acquire = _acquire, - .expire = _expire, - .mapping = _mapping, - .migrate = _migrate, - .roam = _roam, - .tun = _tun, - .destroy = _destroy, - }, - .mutex = mutex_create(MUTEX_TYPE_DEFAULT), - .listeners = linked_list_create(), - .mutex_algs = mutex_create(MUTEX_TYPE_DEFAULT), - .algorithms = linked_list_create(), - .reqids = hashtable_create((hashtable_hash_t)hash_reqid, - (hashtable_equals_t)equals_reqid, 8), - .reqids_by_ts = hashtable_create((hashtable_hash_t)hash_reqid_by_ts, - (hashtable_equals_t)equals_reqid_by_ts, 8), - ); - - ifaces = lib->settings->get_str(lib->settings, - "%s.interfaces_use", NULL, lib->ns); - if (!ifaces) - { - this->ifaces_exclude = TRUE; - ifaces = lib->settings->get_str(lib->settings, - "%s.interfaces_ignore", NULL, lib->ns); - } - if (ifaces) - { - enumerator_t *enumerator; - char *iface; - - enumerator = enumerator_create_token(ifaces, ",", " "); - while (enumerator->enumerate(enumerator, &iface)) - { - if (!this->ifaces_filter) - { - this->ifaces_filter = linked_list_create(); - } - this->ifaces_filter->insert_last(this->ifaces_filter, - strdup(iface)); - } - enumerator->destroy(enumerator); - } - - return &this->public; -} diff --git a/src/libhydra/kernel/kernel_interface.h b/src/libhydra/kernel/kernel_interface.h deleted file mode 100644 index 45efe8946..000000000 --- a/src/libhydra/kernel/kernel_interface.h +++ /dev/null @@ -1,655 +0,0 @@ -/* - * Copyright (C) 2006-2015 Tobias Brunner - * Copyright (C) 2006 Daniel Roethlisberger - * Copyright (C) 2005-2006 Martin Willi - * Copyright (C) 2005 Jan Hutter - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -/* - * Copyright (c) 2012 Nanoteq Pty Ltd - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -/** - * @defgroup kernel_interface kernel_interface - * @{ @ingroup hkernel - */ - -#ifndef KERNEL_INTERFACE_H_ -#define KERNEL_INTERFACE_H_ - -typedef struct kernel_interface_t kernel_interface_t; -typedef enum kernel_feature_t kernel_feature_t; - -#include <networking/host.h> -#include <crypto/prf_plus.h> - -#include <kernel/kernel_listener.h> -#include <kernel/kernel_ipsec.h> -#include <kernel/kernel_net.h> - -/** - * Bitfield of optional features a kernel backend supports. - * - * This feature-set is for both, kernel_ipsec_t and kernel_net_t. Each - * backend returns a subset of these features. - */ -enum kernel_feature_t { - /** IPsec can process ESPv3 (RFC 4303) TFC padded packets */ - KERNEL_ESP_V3_TFC = (1<<0), - /** Networking requires an "exclude" route for IKE/ESP packets */ - KERNEL_REQUIRE_EXCLUDE_ROUTE = (1<<1), - /** IPsec implementation requires UDP encapsulation of ESP packets */ - KERNEL_REQUIRE_UDP_ENCAPSULATION = (1<<2), - /** IPsec backend does not require a policy reinstall on SA updates */ - KERNEL_NO_POLICY_UPDATES = (1<<3), -}; - -/** - * Constructor function for ipsec kernel interface - */ -typedef kernel_ipsec_t* (*kernel_ipsec_constructor_t)(void); - -/** - * Constructor function for network kernel interface - */ -typedef kernel_net_t* (*kernel_net_constructor_t)(void); - -/** - * Manager and wrapper for different kernel interfaces. - * - * The kernel interface handles the communication with the kernel - * for SA and policy management and interface and IP address management. - */ -struct kernel_interface_t { - - /** - * Get the feature set supported by the net and ipsec kernel backends. - * - * @return ORed feature-set of backends - */ - kernel_feature_t (*get_features)(kernel_interface_t *this); - - /** - * Get a SPI from the kernel. - * - * @param src source address of SA - * @param dst destination address of SA - * @param protocol protocol for SA (ESP/AH) - * @param spi allocated spi - * @return SUCCESS if operation completed - */ - status_t (*get_spi)(kernel_interface_t *this, host_t *src, host_t *dst, - u_int8_t protocol, u_int32_t *spi); - - /** - * Get a Compression Parameter Index (CPI) from the kernel. - * - * @param src source address of SA - * @param dst destination address of SA - * @param cpi allocated cpi - * @return SUCCESS if operation completed - */ - status_t (*get_cpi)(kernel_interface_t *this, host_t *src, host_t *dst, - u_int16_t *cpi); - - /** - * Allocate or confirm a reqid to use for a given SA pair. - * - * Each returned reqid by a successful call to alloc_reqid() must be - * released using release_reqid(). - * - * The reqid parameter is an in/out parameter. If it points to non-zero, - * the reqid is confirmed and registered for use. If it points to zero, - * a reqid is allocated for the given selectors, and returned to reqid. - * - * @param local_ts traffic selectors of local side for SA - * @param remote_ts traffic selectors of remote side for SA - * @param mark_in inbound mark on SA - * @param mark_out outbound mark on SA - * @param reqid allocated reqid - * @return SUCCESS if reqid allocated - */ - status_t (*alloc_reqid)(kernel_interface_t *this, - linked_list_t *local_ts, linked_list_t *remote_ts, - mark_t mark_in, mark_t mark_out, - u_int32_t *reqid); - - /** - * Release a previously allocated reqid. - * - * @param reqid reqid to release - * @param mark_in inbound mark on SA - * @param mark_out outbound mark on SA - * @return SUCCESS if reqid released - */ - status_t (*release_reqid)(kernel_interface_t *this, u_int32_t reqid, - mark_t mark_in, mark_t mark_out); - - /** - * Add an SA to the SAD. - * - * This function does install a single SA for a single protocol in one - * direction. - * - * @param src source address for this SA - * @param dst destination address for this SA - * @param spi SPI allocated by us or remote peer - * @param protocol protocol for this SA (ESP/AH) - * @param reqid reqid for this SA - * @param mark optional mark for this SA - * @param tfc Traffic Flow Confidentiality padding for this SA - * @param lifetime lifetime_cfg_t for this SA - * @param enc_alg Algorithm to use for encryption (ESP only) - * @param enc_key key to use for encryption - * @param int_alg Algorithm to use for integrity protection - * @param int_key key to use for integrity protection - * @param mode mode of the SA (tunnel, transport) - * @param ipcomp IPComp transform to use - * @param cpi CPI for IPComp - * @param replay_window anti-replay window size - * @param initiator TRUE if initiator of the exchange creating this SA - * @param encap enable UDP encapsulation for NAT traversal - * @param esn TRUE to use Extended Sequence Numbers - * @param inbound TRUE if this is an inbound SA - * @param update TRUE if an SPI has already been allocated for SA - * @param src_ts list of source traffic selectors - * @param dst_ts list of destination traffic selectors - * @return SUCCESS if operation completed - */ - status_t (*add_sa) (kernel_interface_t *this, - host_t *src, host_t *dst, u_int32_t spi, - u_int8_t protocol, u_int32_t reqid, mark_t mark, - u_int32_t tfc, lifetime_cfg_t *lifetime, - u_int16_t enc_alg, chunk_t enc_key, - u_int16_t int_alg, chunk_t int_key, - ipsec_mode_t mode, u_int16_t ipcomp, u_int16_t cpi, - u_int32_t replay_window, bool initiator, bool encap, - bool esn, bool inbound, bool update, - linked_list_t *src_ts, linked_list_t *dst_ts); - - /** - * Update the hosts on an installed SA. - * - * We cannot directly update the destination address as the kernel - * requires the spi, the protocol AND the destination address (and family) - * to identify SAs. Therefore if the destination address changed we - * create a new SA and delete the old one. - * - * @param spi SPI of the SA - * @param protocol protocol for this SA (ESP/AH) - * @param cpi CPI for IPComp, 0 if no IPComp is used - * @param src current source address - * @param dst current destination address - * @param new_src new source address - * @param new_dst new destination address - * @param encap current use of UDP encapsulation - * @param new_encap new use of UDP encapsulation - * @param mark optional mark for this SA - * @return SUCCESS if operation completed, NOT_SUPPORTED if - * the kernel interface can't update the SA - */ - status_t (*update_sa)(kernel_interface_t *this, - u_int32_t spi, u_int8_t protocol, u_int16_t cpi, - host_t *src, host_t *dst, - host_t *new_src, host_t *new_dst, - bool encap, bool new_encap, mark_t mark); - - /** - * Query the number of bytes processed by an SA from the SAD. - * - * @param src source address for this SA - * @param dst destination address for this SA - * @param spi SPI allocated by us or remote peer - * @param protocol protocol for this SA (ESP/AH) - * @param mark optional mark for this SA - * @param[out] bytes the number of bytes processed by SA - * @param[out] packets number of packets processed by SA - * @param[out] time last (monotonic) time of SA use - * @return SUCCESS if operation completed - */ - status_t (*query_sa) (kernel_interface_t *this, host_t *src, host_t *dst, - u_int32_t spi, u_int8_t protocol, mark_t mark, - u_int64_t *bytes, u_int64_t *packets, time_t *time); - - /** - * Delete a previously installed SA from the SAD. - * - * @param src source address for this SA - * @param dst destination address for this SA - * @param spi SPI allocated by us or remote peer - * @param protocol protocol for this SA (ESP/AH) - * @param cpi CPI for IPComp or 0 - * @param mark optional mark for this SA - * @return SUCCESS if operation completed - */ - status_t (*del_sa) (kernel_interface_t *this, host_t *src, host_t *dst, - u_int32_t spi, u_int8_t protocol, u_int16_t cpi, - mark_t mark); - - /** - * Flush all SAs from the SAD. - * - * @return SUCCESS if operation completed - */ - status_t (*flush_sas) (kernel_interface_t *this); - - /** - * Add a policy to the SPD. - * - * @param src source address of SA - * @param dst dest address of SA - * @param src_ts traffic selector to match traffic source - * @param dst_ts traffic selector to match traffic dest - * @param direction direction of traffic, POLICY_(IN|OUT|FWD) - * @param type type of policy, POLICY_(IPSEC|PASS|DROP) - * @param sa details about the SA(s) tied to this policy - * @param mark mark for this policy - * @param priority priority of this policy - * @return SUCCESS if operation completed - */ - status_t (*add_policy) (kernel_interface_t *this, - host_t *src, host_t *dst, - traffic_selector_t *src_ts, - traffic_selector_t *dst_ts, - policy_dir_t direction, policy_type_t type, - ipsec_sa_cfg_t *sa, mark_t mark, - policy_priority_t priority); - - /** - * Query the use time of a policy. - * - * The use time of a policy is the time the policy was used - * for the last time. - * - * @param src_ts traffic selector to match traffic source - * @param dst_ts traffic selector to match traffic dest - * @param direction direction of traffic, POLICY_(IN|OUT|FWD) - * @param mark optional mark - * @param[out] use_time the (monotonic) time of this SA's last use - * @return SUCCESS if operation completed - */ - status_t (*query_policy) (kernel_interface_t *this, - traffic_selector_t *src_ts, - traffic_selector_t *dst_ts, - policy_dir_t direction, mark_t mark, - time_t *use_time); - - /** - * Remove a policy from the SPD. - * - * @param src source address of SA - * @param dst dest address of SA - * @param src_ts traffic selector to match traffic source - * @param dst_ts traffic selector to match traffic dest - * @param direction direction of traffic, POLICY_(IN|OUT|FWD) - * @param type type of policy, POLICY_(IPSEC|PASS|DROP) - * @param sa details about the SA(s) tied to this policy - * @param mark mark for this policy - * @param priority priority of the policy - * @return SUCCESS if operation completed - */ - status_t (*del_policy) (kernel_interface_t *this, - host_t *src, host_t *dst, - traffic_selector_t *src_ts, - traffic_selector_t *dst_ts, - policy_dir_t direction, policy_type_t type, - ipsec_sa_cfg_t *sa, mark_t mark, - policy_priority_t priority); - - /** - * Flush all policies from the SPD. - * - * @return SUCCESS if operation completed - */ - status_t (*flush_policies) (kernel_interface_t *this); - - /** - * Get our outgoing source address for a destination. - * - * Does a route lookup to get the source address used to reach dest. - * The returned host is allocated and must be destroyed. - * An optional src address can be used to check if a route is available - * for the given source to dest. - * - * @param dest target destination address - * @param src source address to check, or NULL - * @return outgoing source address, NULL if unreachable - */ - host_t* (*get_source_addr)(kernel_interface_t *this, - host_t *dest, host_t *src); - - /** - * Get the next hop for a destination. - * - * Does a route lookup to get the next hop used to reach dest. - * The returned host is allocated and must be destroyed. - * An optional src address can be used to check if a route is available - * for the given source to dest. - * - * @param dest target destination address - * @param prefix prefix length if dest is a subnet, -1 for auto - * @param src source address to check, or NULL - * @return next hop address, NULL if unreachable - */ - host_t* (*get_nexthop)(kernel_interface_t *this, host_t *dest, - int prefix, host_t *src); - - /** - * Get the interface name of a local address. Interfaces that are down or - * ignored by config are not considered. - * - * @param host address to get interface name from - * @param name allocated interface name (optional) - * @return TRUE if interface found and usable - */ - bool (*get_interface)(kernel_interface_t *this, host_t *host, char **name); - - /** - * Creates an enumerator over all local addresses. - * - * This function blocks an internal cached address list until the - * enumerator gets destroyed. - * The hosts are read-only, do not modify of free. - * - * @param which a combination of address types to enumerate - * @return enumerator over host_t's - */ - enumerator_t *(*create_address_enumerator) (kernel_interface_t *this, - kernel_address_type_t which); - - /** - * Add a virtual IP to an interface. - * - * Virtual IPs are attached to an interface. If an IP is added multiple - * times, the IP is refcounted and not removed until del_ip() was called - * as many times as add_ip(). - * - * @param virtual_ip virtual ip address to assign - * @param prefix prefix length to install IP with, -1 for auto - * @param iface interface to install virtual IP on - * @return SUCCESS if operation completed - */ - status_t (*add_ip) (kernel_interface_t *this, host_t *virtual_ip, int prefix, - char *iface); - - /** - * Remove a virtual IP from an interface. - * - * The kernel interface uses refcounting, see add_ip(). - * - * @param virtual_ip virtual ip address to remove - * @param prefix prefix length of the IP to uninstall, -1 for auto - * @param wait TRUE to wait untily IP is gone - * @return SUCCESS if operation completed - */ - status_t (*del_ip) (kernel_interface_t *this, host_t *virtual_ip, - int prefix, bool wait); - - /** - * Add a route. - * - * @param dst_net destination net - * @param prefixlen destination net prefix length - * @param gateway gateway for this route - * @param src_ip source ip of the route - * @param if_name name of the interface the route is bound to - * @return SUCCESS if operation completed - * ALREADY_DONE if the route already exists - */ - status_t (*add_route) (kernel_interface_t *this, chunk_t dst_net, - u_int8_t prefixlen, host_t *gateway, host_t *src_ip, - char *if_name); - - /** - * Delete a route. - * - * @param dst_net destination net - * @param prefixlen destination net prefix length - * @param gateway gateway for this route - * @param src_ip source ip of the route - * @param if_name name of the interface the route is bound to - * @return SUCCESS if operation completed - */ - status_t (*del_route) (kernel_interface_t *this, chunk_t dst_net, - u_int8_t prefixlen, host_t *gateway, host_t *src_ip, - char *if_name); - - /** - * Set up a bypass policy for a given socket. - * - * @param fd socket file descriptor to setup policy for - * @param family protocol family of the socket - * @return TRUE if policy set up successfully - */ - bool (*bypass_socket)(kernel_interface_t *this, int fd, int family); - - /** - * Enable decapsulation of ESP-in-UDP packets for the given port/socket. - * - * @param fd socket file descriptor - * @param family protocol family of the socket - * @param port the UDP port - * @return TRUE if UDP decapsulation was enabled successfully - */ - bool (*enable_udp_decap)(kernel_interface_t *this, int fd, int family, - u_int16_t port); - - - /** - * manager methods - */ - - /** - * Verifies that the given interface is usable and not excluded by - * configuration. - * - * @param iface interface name - * @return TRUE if usable - */ - bool (*is_interface_usable)(kernel_interface_t *this, const char *iface); - - /** - * Check if interfaces are excluded by config. - * - * @return TRUE if no interfaces are exclued by config - */ - bool (*all_interfaces_usable)(kernel_interface_t *this); - - /** - * Tries to find an IP address of a local interface that is included in the - * supplied traffic selector. - * - * @param ts traffic selector - * @param ip returned IP address (has to be destroyed) - * @param vip set to TRUE if returned address is a virtual IP - * @return SUCCESS if address found - */ - status_t (*get_address_by_ts)(kernel_interface_t *this, - traffic_selector_t *ts, host_t **ip, bool *vip); - - /** - * Register an ipsec kernel interface constructor on the manager. - * - * @param create constructor to register - * @return TRUE if the ipsec kernel interface was registered - * successfully, FALSE if an interface was already - * registered or the registration failed - */ - bool (*add_ipsec_interface)(kernel_interface_t *this, - kernel_ipsec_constructor_t create); - - /** - * Unregister an ipsec kernel interface constructor. - * - * @param create constructor to unregister - * @return TRUE if the ipsec kernel interface was unregistered - * successfully, FALSE otherwise - */ - bool (*remove_ipsec_interface)(kernel_interface_t *this, - kernel_ipsec_constructor_t create); - - /** - * Register a network kernel interface constructor on the manager. - * - * @param create constructor to register - * @return TRUE if the kernel net interface was registered - * successfully, FALSE if an interface was already - * registered or the registration failed - */ - bool (*add_net_interface)(kernel_interface_t *this, - kernel_net_constructor_t create); - - /** - * Unregister a network kernel interface constructor. - * - * @param create constructor to unregister - * @return TRUE if the kernel net interface was unregistered - * successfully, FALSE otherwise - */ - bool (*remove_net_interface)(kernel_interface_t *this, - kernel_net_constructor_t create); - - /** - * Add a listener to the kernel interface. - * - * @param listener listener to add - */ - void (*add_listener)(kernel_interface_t *this, - kernel_listener_t *listener); - - /** - * Remove a listener from the kernel interface. - * - * @param listener listener to remove - */ - void (*remove_listener)(kernel_interface_t *this, - kernel_listener_t *listener); - - /** - * Raise an acquire event. - * - * @param reqid reqid of the policy to acquire - * @param src_ts source traffic selector - * @param dst_ts destination traffic selector - */ - void (*acquire)(kernel_interface_t *this, u_int32_t reqid, - traffic_selector_t *src_ts, traffic_selector_t *dst_ts); - - /** - * Raise an expire event. - * - * @param protocol protocol of the expired SA - * @param spi spi of the expired SA - * @param dst destination address of expired SA - * @param hard TRUE if it is a hard expire, FALSE otherwise - */ - void (*expire)(kernel_interface_t *this, u_int8_t protocol, u_int32_t spi, - host_t *dst, bool hard); - - /** - * Raise a mapping event. - * - * @param protocol protocol of affected SA - * @param spi spi of the SA - * @param dst original destination address of SA - * @param remote new remote host - */ - void (*mapping)(kernel_interface_t *this, u_int8_t protocol, u_int32_t spi, - host_t *dst, host_t *remote); - - /** - * Raise a migrate event. - * - * @param reqid reqid of the policy - * @param src_ts source traffic selector - * @param dst_ts destination traffic selector - * @param direction direction of the policy (in|out) - * @param local local host address to be used in the IKE_SA - * @param remote remote host address to be used in the IKE_SA - */ - void (*migrate)(kernel_interface_t *this, u_int32_t reqid, - traffic_selector_t *src_ts, traffic_selector_t *dst_ts, - policy_dir_t direction, host_t *local, host_t *remote); - - /** - * Raise a roam event. - * - * @param address TRUE if address list, FALSE if routing changed - */ - void (*roam)(kernel_interface_t *this, bool address); - - /** - * Raise a tun event. - * - * @param tun TUN device - * @param created TRUE if created, FALSE if going to be destroyed - */ - void (*tun)(kernel_interface_t *this, tun_device_t *tun, bool created); - - /** - * Register a new algorithm with the kernel interface. - * - * @param alg_id the IKE id of the algorithm - * @param type the transform type of the algorithm - * @param kernel_id the kernel id of the algorithm - * @param kernel_name the kernel name of the algorithm - */ - void (*register_algorithm)(kernel_interface_t *this, u_int16_t alg_id, - transform_type_t type, u_int16_t kernel_id, - char *kernel_name); - - /** - * Return the kernel-specific id and/or name for an algorithms depending on - * the arguments specified. - * - * @param alg_id the IKE id of the algorithm - * @param type the transform type of the algorithm - * @param kernel_id the kernel id of the algorithm (optional) - * @param kernel_name the kernel name of the algorithm (optional) - * @return TRUE if algorithm was found - */ - bool (*lookup_algorithm)(kernel_interface_t *this, u_int16_t alg_id, - transform_type_t type, u_int16_t *kernel_id, - char **kernel_name); - - /** - * Destroys a kernel_interface_t object. - */ - void (*destroy) (kernel_interface_t *this); -}; - -/** - * Creates an object of type kernel_interface_t. - */ -kernel_interface_t *kernel_interface_create(void); - -#endif /** KERNEL_INTERFACE_H_ @}*/ diff --git a/src/libhydra/kernel/kernel_ipsec.c b/src/libhydra/kernel/kernel_ipsec.c deleted file mode 100644 index 697b1b33d..000000000 --- a/src/libhydra/kernel/kernel_ipsec.c +++ /dev/null @@ -1,38 +0,0 @@ -/* - * Copyright (C) 2008 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -#include "kernel_ipsec.h" - -#include <hydra.h> - -/** - * See header - */ -bool kernel_ipsec_register(plugin_t *plugin, plugin_feature_t *feature, - bool reg, void *data) -{ - if (reg) - { - return hydra->kernel_interface->add_ipsec_interface( - hydra->kernel_interface, - (kernel_ipsec_constructor_t)data); - } - else - { - return hydra->kernel_interface->remove_ipsec_interface( - hydra->kernel_interface, - (kernel_ipsec_constructor_t)data); - } -} diff --git a/src/libhydra/kernel/kernel_ipsec.h b/src/libhydra/kernel/kernel_ipsec.h deleted file mode 100644 index 2458db5b9..000000000 --- a/src/libhydra/kernel/kernel_ipsec.h +++ /dev/null @@ -1,297 +0,0 @@ -/* - * Copyright (C) 2006-2015 Tobias Brunner - * Copyright (C) 2006 Daniel Roethlisberger - * Copyright (C) 2005-2006 Martin Willi - * Copyright (C) 2005 Jan Hutter - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -/** - * @defgroup kernel_ipsec kernel_ipsec - * @{ @ingroup hkernel - */ - -#ifndef KERNEL_IPSEC_H_ -#define KERNEL_IPSEC_H_ - -typedef struct kernel_ipsec_t kernel_ipsec_t; - -#include <networking/host.h> -#include <ipsec/ipsec_types.h> -#include <selectors/traffic_selector.h> -#include <plugins/plugin.h> -#include <kernel/kernel_interface.h> - -/** - * Interface to the ipsec subsystem of the kernel. - * - * The kernel ipsec interface handles the communication with the kernel - * for SA and policy management. It allows setup of these, and provides - * further the handling of kernel events. - * Policy information are cached in the interface. This is necessary to do - * reference counting. The Linux kernel does not allow the same policy - * installed twice, but we need this as CHILD_SA exist multiple times - * when rekeying. Thats why we do reference counting of policies. - */ -struct kernel_ipsec_t { - - /** - * Get the feature set supported by this kernel backend. - * - * @return ORed feature-set of backend - */ - kernel_feature_t (*get_features)(kernel_ipsec_t *this); - - /** - * Get a SPI from the kernel. - * - * @param src source address of SA - * @param dst destination address of SA - * @param protocol protocol for SA (ESP/AH) - * @param spi allocated spi - * @return SUCCESS if operation completed - */ - status_t (*get_spi)(kernel_ipsec_t *this, host_t *src, host_t *dst, - u_int8_t protocol, u_int32_t *spi); - - /** - * Get a Compression Parameter Index (CPI) from the kernel. - * - * @param src source address of SA - * @param dst destination address of SA - * @param cpi allocated cpi - * @return SUCCESS if operation completed - */ - status_t (*get_cpi)(kernel_ipsec_t *this, host_t *src, host_t *dst, - u_int16_t *cpi); - - /** - * Add an SA to the SAD. - * - * This function does install a single SA for a single protocol in one - * direction. - * - * @param src source address for this SA - * @param dst destination address for this SA - * @param spi SPI allocated by us or remote peer - * @param protocol protocol for this SA (ESP/AH) - * @param reqid unique ID for this SA - * @param mark mark for this SA - * @param tfc Traffic Flow Confidentiality padding for this SA - * @param lifetime lifetime_cfg_t for this SA - * @param enc_alg Algorithm to use for encryption (ESP only) - * @param enc_key key to use for encryption - * @param int_alg Algorithm to use for integrity protection - * @param int_key key to use for integrity protection - * @param mode mode of the SA (tunnel, transport) - * @param ipcomp IPComp transform to use - * @param cpi CPI for IPComp - * @param replay_window anti-replay window size - * @param initiator TRUE if initiator of the exchange creating this SA - * @param encap enable UDP encapsulation for NAT traversal - * @param esn TRUE to use Extended Sequence Numbers - * @param inbound TRUE if this is an inbound SA - * @param update TRUE if an SPI has already been allocated for SA - * @param src_ts list of source traffic selectors - * @param dst_ts list of destination traffic selectors - * @return SUCCESS if operation completed - */ - status_t (*add_sa) (kernel_ipsec_t *this, - host_t *src, host_t *dst, u_int32_t spi, - u_int8_t protocol, u_int32_t reqid, - mark_t mark, u_int32_t tfc, lifetime_cfg_t *lifetime, - u_int16_t enc_alg, chunk_t enc_key, - u_int16_t int_alg, chunk_t int_key, - ipsec_mode_t mode, u_int16_t ipcomp, u_int16_t cpi, - u_int32_t replay_window, bool initiator, bool encap, - bool esn, bool inbound, bool update, - linked_list_t *src_ts, linked_list_t *dst_ts); - - /** - * Update the hosts on an installed SA. - * - * We cannot directly update the destination address as the kernel - * requires the spi, the protocol AND the destination address (and family) - * to identify SAs. Therefore if the destination address changed we - * create a new SA and delete the old one. - * - * @param spi SPI of the SA - * @param protocol protocol for this SA (ESP/AH) - * @param cpi CPI for IPComp, 0 if no IPComp is used - * @param src current source address - * @param dst current destination address - * @param new_src new source address - * @param new_dst new destination address - * @param encap current use of UDP encapsulation - * @param new_encap new use of UDP encapsulation - * @param mark optional mark for this SA - * @return SUCCESS if operation completed, NOT_SUPPORTED if - * the kernel interface can't update the SA - */ - status_t (*update_sa)(kernel_ipsec_t *this, - u_int32_t spi, u_int8_t protocol, u_int16_t cpi, - host_t *src, host_t *dst, - host_t *new_src, host_t *new_dst, - bool encap, bool new_encap, mark_t mark); - - /** - * Query the number of bytes processed by an SA from the SAD. - * - * @param src source address for this SA - * @param dst destination address for this SA - * @param spi SPI allocated by us or remote peer - * @param protocol protocol for this SA (ESP/AH) - * @param mark optional mark for this SA - * @param[out] bytes the number of bytes processed by SA - * @param[out] packets number of packets processed by SA - * @param[out] time last (monotonic) time of SA use - * @return SUCCESS if operation completed - */ - status_t (*query_sa) (kernel_ipsec_t *this, host_t *src, host_t *dst, - u_int32_t spi, u_int8_t protocol, mark_t mark, - u_int64_t *bytes, u_int64_t *packets, time_t *time); - - /** - * Delete a previusly installed SA from the SAD. - * - * @param src source address for this SA - * @param dst destination address for this SA - * @param spi SPI allocated by us or remote peer - * @param protocol protocol for this SA (ESP/AH) - * @param cpi CPI for IPComp or 0 - * @param mark optional mark for this SA - * @return SUCCESS if operation completed - */ - status_t (*del_sa) (kernel_ipsec_t *this, host_t *src, host_t *dst, - u_int32_t spi, u_int8_t protocol, u_int16_t cpi, - mark_t mark); - - /** - * Flush all SAs from the SAD. - * - * @return SUCCESS if operation completed - */ - status_t (*flush_sas) (kernel_ipsec_t *this); - - /** - * Add a policy to the SPD. - * - * @param src source address of SA - * @param dst dest address of SA - * @param src_ts traffic selector to match traffic source - * @param dst_ts traffic selector to match traffic dest - * @param direction direction of traffic, POLICY_(IN|OUT|FWD) - * @param type type of policy, POLICY_(IPSEC|PASS|DROP) - * @param sa details about the SA(s) tied to this policy - * @param mark mark for this policy - * @param priority priority of this policy - * @return SUCCESS if operation completed - */ - status_t (*add_policy) (kernel_ipsec_t *this, - host_t *src, host_t *dst, - traffic_selector_t *src_ts, - traffic_selector_t *dst_ts, - policy_dir_t direction, policy_type_t type, - ipsec_sa_cfg_t *sa, mark_t mark, - policy_priority_t priority); - - /** - * Query the use time of a policy. - * - * The use time of a policy is the time the policy was used for the last - * time. It is not the system time, but a monotonic timestamp as returned - * by time_monotonic. - * - * @param src_ts traffic selector to match traffic source - * @param dst_ts traffic selector to match traffic dest - * @param direction direction of traffic, POLICY_(IN|OUT|FWD) - * @param mark optional mark - * @param[out] use_time the monotonic timestamp of this SA's last use - * @return SUCCESS if operation completed - */ - status_t (*query_policy) (kernel_ipsec_t *this, - traffic_selector_t *src_ts, - traffic_selector_t *dst_ts, - policy_dir_t direction, mark_t mark, - time_t *use_time); - - /** - * Remove a policy from the SPD. - * - * @param src source address of SA - * @param dst dest address of SA - * @param src_ts traffic selector to match traffic source - * @param dst_ts traffic selector to match traffic dest - * @param direction direction of traffic, POLICY_(IN|OUT|FWD) - * @param type type of policy, POLICY_(IPSEC|PASS|DROP) - * @param sa details about the SA(s) tied to this policy - * @param mark mark for this policy - * @param priority priority of the policy - * @return SUCCESS if operation completed - */ - status_t (*del_policy) (kernel_ipsec_t *this, - host_t *src, host_t *dst, - traffic_selector_t *src_ts, - traffic_selector_t *dst_ts, - policy_dir_t direction, policy_type_t type, - ipsec_sa_cfg_t *sa, mark_t mark, - policy_priority_t priority); - - /** - * Flush all policies from the SPD. - * - * @return SUCCESS if operation completed - */ - status_t (*flush_policies) (kernel_ipsec_t *this); - - /** - * Install a bypass policy for the given socket. - * - * @param fd socket file descriptor to setup policy for - * @param family protocol family of the socket - * @return TRUE of policy set up successfully - */ - bool (*bypass_socket)(kernel_ipsec_t *this, int fd, int family); - - /** - * Enable decapsulation of ESP-in-UDP packets for the given port/socket. - * - * @param fd socket file descriptor - * @param family protocol family of the socket - * @param port the UDP port - * @return TRUE if UDP decapsulation was enabled successfully - */ - bool (*enable_udp_decap)(kernel_ipsec_t *this, int fd, int family, - u_int16_t port); - - /** - * Destroy the implementation. - */ - void (*destroy) (kernel_ipsec_t *this); -}; - -/** - * Helper function to (un-)register IPsec kernel interfaces from plugin features. - * - * This function is a plugin_feature_callback_t and can be used with the - * PLUGIN_CALLBACK macro to register an IPsec kernel interface constructor. - * - * @param plugin plugin registering the kernel interface - * @param feature associated plugin feature - * @param reg TRUE to register, FALSE to unregister - * @param data data passed to callback, an kernel_ipsec_constructor_t - */ -bool kernel_ipsec_register(plugin_t *plugin, plugin_feature_t *feature, - bool reg, void *data); - -#endif /** KERNEL_IPSEC_H_ @}*/ diff --git a/src/libhydra/kernel/kernel_listener.h b/src/libhydra/kernel/kernel_listener.h deleted file mode 100644 index 8074356a4..000000000 --- a/src/libhydra/kernel/kernel_listener.h +++ /dev/null @@ -1,107 +0,0 @@ -/* - * Copyright (C) 2010-2013 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -/** - * @defgroup kernel_listener kernel_listener - * @{ @ingroup hkernel - */ - -#ifndef KERNEL_LISTENER_H_ -#define KERNEL_LISTENER_H_ - -typedef struct kernel_listener_t kernel_listener_t; - -#include <networking/host.h> -#include <networking/tun_device.h> -#include <selectors/traffic_selector.h> -#include <kernel/kernel_ipsec.h> - -/** - * Interface for components interested in kernel events. - * - * All hooks are optional. - */ -struct kernel_listener_t { - - /** - * Hook called if an acquire event for a policy is received. - * - * @param reqid reqid of the policy to acquire - * @param src_ts source traffic selector - * @param dst_ts destination traffic selector - * @return TRUE to remain registered, FALSE to unregister - */ - bool (*acquire)(kernel_listener_t *this, u_int32_t reqid, - traffic_selector_t *src_ts, traffic_selector_t *dst_ts); - - /** - * Hook called if an exire event for an IPsec SA is received. - * - * @param protocol protocol of the expired SA - * @param spi spi of the expired SA - * @param dst destination address of expired SA - * @param hard TRUE if it is a hard expire, FALSE otherwise - * @return TRUE to remain registered, FALSE to unregister - */ - bool (*expire)(kernel_listener_t *this, u_int8_t protocol, u_int32_t spi, - host_t *dst, bool hard); - - /** - * Hook called if the NAT mappings of an IPsec SA changed. - * - * @param protocol IPsec protocol of affected SA - * @param spi spi of the SA - * @param dst old destinatino address of SA - * @param remote new remote host - * @return TRUE to remain registered, FALSE to unregister - */ - bool (*mapping)(kernel_listener_t *this, u_int8_t protocol, u_int32_t spi, - host_t *dst, host_t *remote); - - /** - * Hook called if a migrate event for a policy is received. - * - * @param reqid reqid of the policy - * @param src_ts source traffic selector - * @param dst_ts destination traffic selector - * @param direction direction of the policy (in|out) - * @param local local host address to be used in the IKE_SA - * @param remote remote host address to be used in the IKE_SA - * @return TRUE to remain registered, FALSE to unregister - */ - bool (*migrate)(kernel_listener_t *this, u_int32_t reqid, - traffic_selector_t *src_ts, traffic_selector_t *dst_ts, - policy_dir_t direction, host_t *local, host_t *remote); - - /** - * Hook called if changes in the networking layer occurred (interfaces - * up/down, routes added/deleted etc.). - * - * @param address TRUE if address list, FALSE if routing changed - * @return TRUE to remain registered, FALSE to unregister - */ - bool (*roam)(kernel_listener_t *this, bool address); - - /** - * Hook called after a TUN device was created for a virtual IP address, or - * before such a device gets destroyed. - * - * @param tun TUN device - * @param created TRUE if created, FALSE if going to be destroyed - */ - bool (*tun)(kernel_listener_t *this, tun_device_t *tun, bool created); -}; - -#endif /** KERNEL_LISTENER_H_ @}*/ diff --git a/src/libhydra/kernel/kernel_net.c b/src/libhydra/kernel/kernel_net.c deleted file mode 100644 index 07d8b2999..000000000 --- a/src/libhydra/kernel/kernel_net.c +++ /dev/null @@ -1,38 +0,0 @@ -/* - * Copyright (C) 2011 Martin Willi - * Copyright (C) 2011 revosec AG - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -#include "kernel_net.h" - -#include <hydra.h> - -/** - * See header - */ -bool kernel_net_register(plugin_t *plugin, plugin_feature_t *feature, - bool reg, void *data) -{ - if (reg) - { - return hydra->kernel_interface->add_net_interface( - hydra->kernel_interface, - (kernel_net_constructor_t)data); - } - else - { - return hydra->kernel_interface->remove_net_interface( - hydra->kernel_interface, - (kernel_net_constructor_t)data); - } -} diff --git a/src/libhydra/kernel/kernel_net.h b/src/libhydra/kernel/kernel_net.h deleted file mode 100644 index 4312c17d1..000000000 --- a/src/libhydra/kernel/kernel_net.h +++ /dev/null @@ -1,196 +0,0 @@ -/* - * Copyright (C) 2008-2012 Tobias Brunner - * Copyright (C) 2007 Martin Willi - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -/** - * @defgroup kernel_net kernel_net - * @{ @ingroup hkernel - */ - -#ifndef KERNEL_NET_H_ -#define KERNEL_NET_H_ - -typedef struct kernel_net_t kernel_net_t; -typedef enum kernel_address_type_t kernel_address_type_t; - -#include <collections/enumerator.h> -#include <networking/host.h> -#include <plugins/plugin.h> -#include <kernel/kernel_interface.h> - -/** - * Type of addresses (e.g. when enumerating them) - */ -enum kernel_address_type_t { - /** normal addresses (on regular, up, non-ignored) interfaces */ - ADDR_TYPE_REGULAR = (1 << 0), - /** addresses on down interfaces */ - ADDR_TYPE_DOWN = (1 << 1), - /** addresses on ignored interfaces */ - ADDR_TYPE_IGNORED = (1 << 2), - /** addresses on loopback interfaces */ - ADDR_TYPE_LOOPBACK = (1 << 3), - /** virtual IP addresses */ - ADDR_TYPE_VIRTUAL = (1 << 4), - /** to enumerate all available addresses */ - ADDR_TYPE_ALL = (1 << 5) - 1, -}; - -/** - * Interface to the network subsystem of the kernel. - * - * The kernel network interface handles the communication with the kernel - * for interface and IP address management. - */ -struct kernel_net_t { - - /** - * Get the feature set supported by this kernel backend. - * - * @return ORed feature-set of backend - */ - kernel_feature_t (*get_features)(kernel_net_t *this); - - /** - * Get our outgoing source address for a destination. - * - * Does a route lookup to get the source address used to reach dest. - * The returned host is allocated and must be destroyed. - * An optional src address can be used to check if a route is available - * for the given source to dest. - * - * @param dest target destination address - * @param src source address to check, or NULL - * @return outgoing source address, NULL if unreachable - */ - host_t* (*get_source_addr)(kernel_net_t *this, host_t *dest, host_t *src); - - /** - * Get the next hop for a destination. - * - * Does a route lookup to get the next hop used to reach dest. - * The returned host is allocated and must be destroyed. - * An optional src address can be used to check if a route is available - * for the given source to dest. - * - * @param dest target destination address - * @param prefix prefix length if dest is a subnet, -1 for auto - * @param src source address to check, or NULL - * @return next hop address, NULL if unreachable - */ - host_t* (*get_nexthop)(kernel_net_t *this, host_t *dest, int prefix, - host_t *src); - - /** - * Get the interface name of a local address. Interfaces that are down or - * ignored by config are not considered. - * - * @param host address to get interface name from - * @param name allocated interface name (optional) - * @return TRUE if interface found and usable - */ - bool (*get_interface) (kernel_net_t *this, host_t *host, char **name); - - /** - * Creates an enumerator over all local addresses. - * - * This function blocks an internal cached address list until the - * enumerator gets destroyed. - * The hosts are read-only, do not modify of free. - * - * @param which a combination of address types to enumerate - * @return enumerator over host_t's - */ - enumerator_t *(*create_address_enumerator) (kernel_net_t *this, - kernel_address_type_t which); - - /** - * Add a virtual IP to an interface. - * - * Virtual IPs are attached to an interface. If an IP is added multiple - * times, the IP is refcounted and not removed until del_ip() was called - * as many times as add_ip(). - * - * @param virtual_ip virtual ip address to assign - * @param prefix prefix length to install with IP address, -1 for auto - * @param iface interface to install virtual IP on - * @return SUCCESS if operation completed - */ - status_t (*add_ip) (kernel_net_t *this, host_t *virtual_ip, int prefix, - char *iface); - - /** - * Remove a virtual IP from an interface. - * - * The kernel interface uses refcounting, see add_ip(). - * - * @param virtual_ip virtual ip address to remove - * @param prefix prefix length of the IP to uninstall, -1 for auto - * @param wait TRUE to wait until IP is gone - * @return SUCCESS if operation completed - */ - status_t (*del_ip) (kernel_net_t *this, host_t *virtual_ip, int prefix, - bool wait); - - /** - * Add a route. - * - * @param dst_net destination net - * @param prefixlen destination net prefix length - * @param gateway gateway for this route - * @param src_ip source ip of the route - * @param if_name name of the interface the route is bound to - * @return SUCCESS if operation completed - * ALREADY_DONE if the route already exists - */ - status_t (*add_route) (kernel_net_t *this, chunk_t dst_net, - u_int8_t prefixlen, host_t *gateway, host_t *src_ip, - char *if_name); - - /** - * Delete a route. - * - * @param dst_net destination net - * @param prefixlen destination net prefix length - * @param gateway gateway for this route - * @param src_ip source ip of the route - * @param if_name name of the interface the route is bound to - * @return SUCCESS if operation completed - */ - status_t (*del_route) (kernel_net_t *this, chunk_t dst_net, - u_int8_t prefixlen, host_t *gateway, host_t *src_ip, - char *if_name); - - /** - * Destroy the implementation. - */ - void (*destroy) (kernel_net_t *this); -}; - -/** - * Helper function to (un-)register net kernel interfaces from plugin features. - * - * This function is a plugin_feature_callback_t and can be used with the - * PLUGIN_CALLBACK macro to register an net kernel interface constructor. - * - * @param plugin plugin registering the kernel interface - * @param feature associated plugin feature - * @param reg TRUE to register, FALSE to unregister - * @param data data passed to callback, an kernel_net_constructor_t - */ -bool kernel_net_register(plugin_t *plugin, plugin_feature_t *feature, - bool reg, void *data); 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Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -#include <sys/types.h> -#include <sys/socket.h> -#include <stdint.h> -#include <linux/ipsec.h> -#include <linux/netlink.h> -#include <linux/rtnetlink.h> -#include <linux/xfrm.h> -#include <linux/udp.h> -#include <unistd.h> -#include <time.h> -#include <errno.h> -#include <string.h> -#include <fcntl.h> - -#include "kernel_netlink_ipsec.h" -#include "kernel_netlink_shared.h" - -#include <hydra.h> -#include <utils/debug.h> -#include <threading/mutex.h> -#include <collections/array.h> -#include <collections/hashtable.h> -#include <collections/linked_list.h> - -/** Required for Linux 2.6.26 kernel and later */ -#ifndef XFRM_STATE_AF_UNSPEC -#define XFRM_STATE_AF_UNSPEC 32 -#endif - -/** From linux/in.h */ -#ifndef IP_XFRM_POLICY -#define IP_XFRM_POLICY 17 -#endif - -/** Missing on uclibc */ -#ifndef IPV6_XFRM_POLICY -#define IPV6_XFRM_POLICY 34 -#endif /*IPV6_XFRM_POLICY*/ - -/* from linux/udp.h */ -#ifndef UDP_ENCAP -#define UDP_ENCAP 100 -#endif - -#ifndef UDP_ENCAP_ESPINUDP -#define UDP_ENCAP_ESPINUDP 2 -#endif - -/* this is not defined on some platforms */ -#ifndef SOL_UDP -#define SOL_UDP IPPROTO_UDP -#endif - -/** Base priority for installed policies */ -#define PRIO_BASE 384 - -/** Default lifetime of an acquire XFRM state (in seconds) */ -#define DEFAULT_ACQUIRE_LIFETIME 165 - -/** - * Map the limit for bytes and packets to XFRM_INF by default - */ -#define XFRM_LIMIT(x) ((x) == 0 ? XFRM_INF : (x)) - -/** - * Create ORable bitfield of XFRM NL groups - */ -#define XFRMNLGRP(x) (1<<(XFRMNLGRP_##x-1)) - -/** - * Returns a pointer to the first rtattr following the nlmsghdr *nlh and the - * 'usual' netlink data x like 'struct xfrm_usersa_info' - */ -#define XFRM_RTA(nlh, x) ((struct rtattr*)(NLMSG_DATA(nlh) + \ - NLMSG_ALIGN(sizeof(x)))) -/** - * Returns the total size of attached rta data - * (after 'usual' netlink data x like 'struct xfrm_usersa_info') - */ -#define XFRM_PAYLOAD(nlh, x) NLMSG_PAYLOAD(nlh, sizeof(x)) - -typedef struct kernel_algorithm_t kernel_algorithm_t; - -/** - * Mapping of IKEv2 kernel identifier to linux crypto API names - */ -struct kernel_algorithm_t { - /** - * Identifier specified in IKEv2 - */ - int ikev2; - - /** - * Name of the algorithm in linux crypto API - */ - char *name; -}; - -ENUM(xfrm_msg_names, XFRM_MSG_NEWSA, XFRM_MSG_MAPPING, - "XFRM_MSG_NEWSA", - "XFRM_MSG_DELSA", - "XFRM_MSG_GETSA", - "XFRM_MSG_NEWPOLICY", - "XFRM_MSG_DELPOLICY", - "XFRM_MSG_GETPOLICY", - "XFRM_MSG_ALLOCSPI", - "XFRM_MSG_ACQUIRE", - "XFRM_MSG_EXPIRE", - "XFRM_MSG_UPDPOLICY", - "XFRM_MSG_UPDSA", - "XFRM_MSG_POLEXPIRE", - "XFRM_MSG_FLUSHSA", - "XFRM_MSG_FLUSHPOLICY", - "XFRM_MSG_NEWAE", - "XFRM_MSG_GETAE", - "XFRM_MSG_REPORT", - "XFRM_MSG_MIGRATE", - "XFRM_MSG_NEWSADINFO", - "XFRM_MSG_GETSADINFO", - "XFRM_MSG_NEWSPDINFO", - "XFRM_MSG_GETSPDINFO", - "XFRM_MSG_MAPPING" -); - -ENUM(xfrm_attr_type_names, XFRMA_UNSPEC, XFRMA_REPLAY_ESN_VAL, - "XFRMA_UNSPEC", - "XFRMA_ALG_AUTH", - "XFRMA_ALG_CRYPT", - "XFRMA_ALG_COMP", - "XFRMA_ENCAP", - "XFRMA_TMPL", - "XFRMA_SA", - "XFRMA_POLICY", - "XFRMA_SEC_CTX", - "XFRMA_LTIME_VAL", - "XFRMA_REPLAY_VAL", - "XFRMA_REPLAY_THRESH", - "XFRMA_ETIMER_THRESH", - "XFRMA_SRCADDR", - "XFRMA_COADDR", - "XFRMA_LASTUSED", - "XFRMA_POLICY_TYPE", - "XFRMA_MIGRATE", - "XFRMA_ALG_AEAD", - "XFRMA_KMADDRESS", - "XFRMA_ALG_AUTH_TRUNC", - "XFRMA_MARK", - "XFRMA_TFCPAD", - "XFRMA_REPLAY_ESN_VAL", -); - -/** - * Algorithms for encryption - */ -static kernel_algorithm_t encryption_algs[] = { -/* {ENCR_DES_IV64, "***" }, */ - {ENCR_DES, "des" }, - {ENCR_3DES, "des3_ede" }, -/* {ENCR_RC5, "***" }, */ -/* {ENCR_IDEA, "***" }, */ - {ENCR_CAST, "cast5" }, - {ENCR_BLOWFISH, "blowfish" }, -/* {ENCR_3IDEA, "***" }, */ -/* {ENCR_DES_IV32, "***" }, */ - {ENCR_NULL, "cipher_null" }, - {ENCR_AES_CBC, "aes" }, - {ENCR_AES_CTR, "rfc3686(ctr(aes))" }, - {ENCR_AES_CCM_ICV8, "rfc4309(ccm(aes))" }, - {ENCR_AES_CCM_ICV12, "rfc4309(ccm(aes))" }, - {ENCR_AES_CCM_ICV16, "rfc4309(ccm(aes))" }, - {ENCR_AES_GCM_ICV8, "rfc4106(gcm(aes))" }, - {ENCR_AES_GCM_ICV12, "rfc4106(gcm(aes))" }, - {ENCR_AES_GCM_ICV16, "rfc4106(gcm(aes))" }, - {ENCR_NULL_AUTH_AES_GMAC, "rfc4543(gcm(aes))" }, - {ENCR_CAMELLIA_CBC, "cbc(camellia)" }, -/* {ENCR_CAMELLIA_CTR, "***" }, */ -/* {ENCR_CAMELLIA_CCM_ICV8, "***" }, */ -/* {ENCR_CAMELLIA_CCM_ICV12, "***" }, */ -/* {ENCR_CAMELLIA_CCM_ICV16, "***" }, */ - {ENCR_SERPENT_CBC, "serpent" }, - {ENCR_TWOFISH_CBC, "twofish" }, - {ENCR_CHACHA20_POLY1305, "rfc7539esp(chacha20,poly1305)"}, -}; - -/** - * Algorithms for integrity protection - */ -static kernel_algorithm_t integrity_algs[] = { - {AUTH_HMAC_MD5_96, "md5" }, - {AUTH_HMAC_MD5_128, "hmac(md5)" }, - {AUTH_HMAC_SHA1_96, "sha1" }, - {AUTH_HMAC_SHA1_160, "hmac(sha1)" }, - {AUTH_HMAC_SHA2_256_96, "sha256" }, - {AUTH_HMAC_SHA2_256_128, "hmac(sha256)" }, - {AUTH_HMAC_SHA2_384_192, "hmac(sha384)" }, - {AUTH_HMAC_SHA2_512_256, "hmac(sha512)" }, -/* {AUTH_DES_MAC, "***" }, */ -/* {AUTH_KPDK_MD5, "***" }, */ - {AUTH_AES_XCBC_96, "xcbc(aes)" }, -}; - -/** - * Algorithms for IPComp - */ -static kernel_algorithm_t compression_algs[] = { -/* {IPCOMP_OUI, "***" }, */ - {IPCOMP_DEFLATE, "deflate" }, - {IPCOMP_LZS, "lzs" }, - {IPCOMP_LZJH, "lzjh" }, -}; - -/** - * Look up a kernel algorithm name and its key size - */ -static char* lookup_algorithm(transform_type_t type, int ikev2) -{ - kernel_algorithm_t *list; - int i, count; - char *name; - - switch (type) - { - case ENCRYPTION_ALGORITHM: - list = encryption_algs; - count = countof(encryption_algs); - break; - case INTEGRITY_ALGORITHM: - list = integrity_algs; - count = countof(integrity_algs); - break; - case COMPRESSION_ALGORITHM: - list = compression_algs; - count = countof(compression_algs); - break; - default: - return NULL; - } - for (i = 0; i < count; i++) - { - if (list[i].ikev2 == ikev2) - { - return list[i].name; - } - } - if (hydra->kernel_interface->lookup_algorithm(hydra->kernel_interface, - ikev2, type, NULL, &name)) - { - return name; - } - return NULL; -} - -typedef struct private_kernel_netlink_ipsec_t private_kernel_netlink_ipsec_t; - -/** - * Private variables and functions of kernel_netlink class. - */ -struct private_kernel_netlink_ipsec_t { - /** - * Public part of the kernel_netlink_t object - */ - kernel_netlink_ipsec_t public; - - /** - * Mutex to lock access to installed policies - */ - mutex_t *mutex; - - /** - * Hash table of installed policies (policy_entry_t) - */ - hashtable_t *policies; - - /** - * Hash table of IPsec SAs using policies (ipsec_sa_t) - */ - hashtable_t *sas; - - /** - * Netlink xfrm socket (IPsec) - */ - netlink_socket_t *socket_xfrm; - - /** - * Netlink xfrm socket to receive acquire and expire events - */ - int socket_xfrm_events; - - /** - * Whether to install routes along policies - */ - bool install_routes; - - /** - * Whether to set protocol and ports on selector installed with transport - * mode IPsec SAs - */ - bool proto_port_transport; - - /** - * Whether to always use UPDATE to install policies - */ - bool policy_update; - - /** - * Installed port based IKE bypass policies, as bypass_t - */ - array_t *bypass; -}; - -typedef struct route_entry_t route_entry_t; - -/** - * Installed routing entry - */ -struct route_entry_t { - /** Name of the interface the route is bound to */ - char *if_name; - - /** Source ip of the route */ - host_t *src_ip; - - /** Gateway for this route */ - host_t *gateway; - - /** Destination net */ - chunk_t dst_net; - - /** Destination net prefixlen */ - u_int8_t prefixlen; -}; - -/** - * Destroy a route_entry_t object - */ -static void route_entry_destroy(route_entry_t *this) -{ - free(this->if_name); - this->src_ip->destroy(this->src_ip); - DESTROY_IF(this->gateway); - chunk_free(&this->dst_net); - free(this); -} - -/** - * Compare two route_entry_t objects - */ -static bool route_entry_equals(route_entry_t *a, route_entry_t *b) -{ - return a->if_name && b->if_name && streq(a->if_name, b->if_name) && - a->src_ip->ip_equals(a->src_ip, b->src_ip) && - a->gateway->ip_equals(a->gateway, b->gateway) && - chunk_equals(a->dst_net, b->dst_net) && a->prefixlen == b->prefixlen; -} - -typedef struct ipsec_sa_t ipsec_sa_t; - -/** - * IPsec SA assigned to a policy. - */ -struct ipsec_sa_t { - /** Source address of this SA */ - host_t *src; - - /** Destination address of this SA */ - host_t *dst; - - /** Optional mark */ - mark_t mark; - - /** Description of this SA */ - ipsec_sa_cfg_t cfg; - - /** Reference count for this SA */ - refcount_t refcount; -}; - -/** - * Hash function for ipsec_sa_t objects - */ -static u_int ipsec_sa_hash(ipsec_sa_t *sa) -{ - return chunk_hash_inc(sa->src->get_address(sa->src), - chunk_hash_inc(sa->dst->get_address(sa->dst), - chunk_hash_inc(chunk_from_thing(sa->mark), - chunk_hash(chunk_from_thing(sa->cfg))))); -} - -/** - * Equality function for ipsec_sa_t objects - */ -static bool ipsec_sa_equals(ipsec_sa_t *sa, ipsec_sa_t *other_sa) -{ - return sa->src->ip_equals(sa->src, other_sa->src) && - sa->dst->ip_equals(sa->dst, other_sa->dst) && - memeq(&sa->mark, &other_sa->mark, sizeof(mark_t)) && - memeq(&sa->cfg, &other_sa->cfg, sizeof(ipsec_sa_cfg_t)); -} - -/** - * Allocate or reference an IPsec SA object - */ -static ipsec_sa_t *ipsec_sa_create(private_kernel_netlink_ipsec_t *this, - host_t *src, host_t *dst, mark_t mark, - ipsec_sa_cfg_t *cfg) -{ - ipsec_sa_t *sa, *found; - INIT(sa, - .src = src, - .dst = dst, - .mark = mark, - .cfg = *cfg, - ); - found = this->sas->get(this->sas, sa); - if (!found) - { - sa->src = src->clone(src); - sa->dst = dst->clone(dst); - this->sas->put(this->sas, sa, sa); - } - else - { - free(sa); - sa = found; - } - ref_get(&sa->refcount); - return sa; -} - -/** - * Release and destroy an IPsec SA object - */ -static void ipsec_sa_destroy(private_kernel_netlink_ipsec_t *this, - ipsec_sa_t *sa) -{ - if (ref_put(&sa->refcount)) - { - this->sas->remove(this->sas, sa); - DESTROY_IF(sa->src); - DESTROY_IF(sa->dst); - free(sa); - } -} - -typedef struct policy_sa_t policy_sa_t; -typedef struct policy_sa_fwd_t policy_sa_fwd_t; - -/** - * Mapping between a policy and an IPsec SA. - */ -struct policy_sa_t { - /** Priority assigned to the policy when installed with this SA */ - u_int32_t priority; - - /** Type of the policy */ - policy_type_t type; - - /** Assigned SA */ - ipsec_sa_t *sa; -}; - -/** - * For forward policies we also cache the traffic selectors in order to install - * the route. - */ -struct policy_sa_fwd_t { - /** Generic interface */ - policy_sa_t generic; - - /** Source traffic selector of this policy */ - traffic_selector_t *src_ts; - - /** Destination traffic selector of this policy */ - traffic_selector_t *dst_ts; -}; - -/** - * Create a policy_sa(_fwd)_t object - */ -static policy_sa_t *policy_sa_create(private_kernel_netlink_ipsec_t *this, - policy_dir_t dir, policy_type_t type, host_t *src, host_t *dst, - traffic_selector_t *src_ts, traffic_selector_t *dst_ts, mark_t mark, - ipsec_sa_cfg_t *cfg) -{ - policy_sa_t *policy; - - if (dir == POLICY_FWD) - { - policy_sa_fwd_t *fwd; - INIT(fwd, - .src_ts = src_ts->clone(src_ts), - .dst_ts = dst_ts->clone(dst_ts), - ); - policy = &fwd->generic; - } - else - { - INIT(policy, .priority = 0); - } - policy->type = type; - policy->sa = ipsec_sa_create(this, src, dst, mark, cfg); - return policy; -} - -/** - * Destroy a policy_sa(_fwd)_t object - */ -static void policy_sa_destroy(policy_sa_t *policy, policy_dir_t *dir, - private_kernel_netlink_ipsec_t *this) -{ - if (*dir == POLICY_FWD) - { - policy_sa_fwd_t *fwd = (policy_sa_fwd_t*)policy; - fwd->src_ts->destroy(fwd->src_ts); - fwd->dst_ts->destroy(fwd->dst_ts); - } - ipsec_sa_destroy(this, policy->sa); - free(policy); -} - -typedef struct policy_entry_t policy_entry_t; - -/** - * Installed kernel policy. - */ -struct policy_entry_t { - - /** Direction of this policy: in, out, forward */ - u_int8_t direction; - - /** Parameters of installed policy */ - struct xfrm_selector sel; - - /** Optional mark */ - u_int32_t mark; - - /** Associated route installed for this policy */ - route_entry_t *route; - - /** List of SAs this policy is used by, ordered by priority */ - linked_list_t *used_by; - - /** reqid for this policy */ - u_int32_t reqid; -}; - -/** - * Destroy a policy_entry_t object - */ -static void policy_entry_destroy(private_kernel_netlink_ipsec_t *this, - policy_entry_t *policy) -{ - if (policy->route) - { - route_entry_destroy(policy->route); - } - if (policy->used_by) - { - policy->used_by->invoke_function(policy->used_by, - (linked_list_invoke_t)policy_sa_destroy, - &policy->direction, this); - policy->used_by->destroy(policy->used_by); - } - free(policy); -} - -/** - * Hash function for policy_entry_t objects - */ -static u_int policy_hash(policy_entry_t *key) -{ - chunk_t chunk = chunk_from_thing(key->sel); - return chunk_hash_inc(chunk, chunk_hash(chunk_from_thing(key->mark))); -} - -/** - * Equality function for policy_entry_t objects - */ -static bool policy_equals(policy_entry_t *key, policy_entry_t *other_key) -{ - return memeq(&key->sel, &other_key->sel, sizeof(struct xfrm_selector)) && - key->mark == other_key->mark && - key->direction == other_key->direction; -} - -/** - * Calculate the priority of a policy - */ -static inline u_int32_t get_priority(policy_entry_t *policy, - policy_priority_t prio) -{ - u_int32_t priority = PRIO_BASE; - switch (prio) - { - case POLICY_PRIORITY_FALLBACK: - priority <<= 1; - /* fall-through */ - case POLICY_PRIORITY_ROUTED: - priority <<= 1; - /* fall-through */ - case POLICY_PRIORITY_DEFAULT: - priority <<= 1; - /* fall-through */ - case POLICY_PRIORITY_PASS: - break; - } - /* calculate priority based on selector size, small size = high prio */ - priority -= policy->sel.prefixlen_s; - priority -= policy->sel.prefixlen_d; - priority <<= 2; /* make some room for the two flags */ - priority += policy->sel.sport_mask || policy->sel.dport_mask ? 0 : 2; - priority += policy->sel.proto ? 0 : 1; - return priority; -} - -/** - * Convert the general ipsec mode to the one defined in xfrm.h - */ -static u_int8_t mode2kernel(ipsec_mode_t mode) -{ - switch (mode) - { - case MODE_TRANSPORT: - return XFRM_MODE_TRANSPORT; - case MODE_TUNNEL: - return XFRM_MODE_TUNNEL; - case MODE_BEET: - return XFRM_MODE_BEET; - default: - return mode; - } -} - -/** - * Convert a host_t to a struct xfrm_address - */ -static void host2xfrm(host_t *host, xfrm_address_t *xfrm) -{ - chunk_t chunk = host->get_address(host); - memcpy(xfrm, chunk.ptr, min(chunk.len, sizeof(xfrm_address_t))); -} - -/** - * Convert a struct xfrm_address to a host_t - */ -static host_t* xfrm2host(int family, xfrm_address_t *xfrm, u_int16_t port) -{ - chunk_t chunk; - - switch (family) - { - case AF_INET: - chunk = chunk_create((u_char*)&xfrm->a4, sizeof(xfrm->a4)); - break; - case AF_INET6: - chunk = chunk_create((u_char*)&xfrm->a6, sizeof(xfrm->a6)); - break; - default: - return NULL; - } - return host_create_from_chunk(family, chunk, ntohs(port)); -} - -/** - * Convert a traffic selector address range to subnet and its mask. - */ -static void ts2subnet(traffic_selector_t* ts, - xfrm_address_t *net, u_int8_t *mask) -{ - host_t *net_host; - chunk_t net_chunk; - - ts->to_subnet(ts, &net_host, mask); - net_chunk = net_host->get_address(net_host); - memcpy(net, net_chunk.ptr, net_chunk.len); - net_host->destroy(net_host); -} - -/** - * Convert a traffic selector port range to port/portmask - */ -static void ts2ports(traffic_selector_t* ts, - u_int16_t *port, u_int16_t *mask) -{ - /* Linux does not seem to accept complex portmasks. Only - * any or a specific port is allowed. We set to any, if we have - * a port range, or to a specific, if we have one port only. - */ - u_int16_t from, to; - - from = ts->get_from_port(ts); - to = ts->get_to_port(ts); - - if (from == to) - { - *port = htons(from); - *mask = ~0; - } - else - { - *port = 0; - *mask = 0; - } -} - -/** - * Convert a pair of traffic_selectors to an xfrm_selector - */ -static struct xfrm_selector ts2selector(traffic_selector_t *src, - traffic_selector_t *dst) -{ - struct xfrm_selector sel; - u_int16_t port; - - memset(&sel, 0, sizeof(sel)); - sel.family = (src->get_type(src) == TS_IPV4_ADDR_RANGE) ? AF_INET : AF_INET6; - /* src or dest proto may be "any" (0), use more restrictive one */ - sel.proto = max(src->get_protocol(src), dst->get_protocol(dst)); - ts2subnet(dst, &sel.daddr, &sel.prefixlen_d); - ts2subnet(src, &sel.saddr, &sel.prefixlen_s); - ts2ports(dst, &sel.dport, &sel.dport_mask); - ts2ports(src, &sel.sport, &sel.sport_mask); - if ((sel.proto == IPPROTO_ICMP || sel.proto == IPPROTO_ICMPV6) && - (sel.dport || sel.sport)) - { - /* the kernel expects the ICMP type and code in the source and - * destination port fields, respectively. */ - port = ntohs(max(sel.dport, sel.sport)); - sel.sport = htons(traffic_selector_icmp_type(port)); - sel.sport_mask = sel.sport ? ~0 : 0; - sel.dport = htons(traffic_selector_icmp_code(port)); - sel.dport_mask = sel.dport ? ~0 : 0; - } - sel.ifindex = 0; - sel.user = 0; - - return sel; -} - -/** - * Convert an xfrm_selector to a src|dst traffic_selector - */ -static traffic_selector_t* selector2ts(struct xfrm_selector *sel, bool src) -{ - u_char *addr; - u_int8_t prefixlen; - u_int16_t port = 0; - host_t *host = NULL; - - if (src) - { - addr = (u_char*)&sel->saddr; - prefixlen = sel->prefixlen_s; - if (sel->sport_mask) - { - port = ntohs(sel->sport); - } - } - else - { - addr = (u_char*)&sel->daddr; - prefixlen = sel->prefixlen_d; - if (sel->dport_mask) - { - port = ntohs(sel->dport); - } - } - if (sel->proto == IPPROTO_ICMP || sel->proto == IPPROTO_ICMPV6) - { /* convert ICMP[v6] message type and code as supplied by the kernel in - * source and destination ports (both in network order) */ - port = (sel->sport >> 8) | (sel->dport & 0xff00); - port = ntohs(port); - } - /* The Linux 2.6 kernel does not set the selector's family field, - * so as a kludge we additionally test the prefix length. - */ - if (sel->family == AF_INET || sel->prefixlen_s == 32) - { - host = host_create_from_chunk(AF_INET, chunk_create(addr, 4), 0); - } - else if (sel->family == AF_INET6 || sel->prefixlen_s == 128) - { - host = host_create_from_chunk(AF_INET6, chunk_create(addr, 16), 0); - } - - if (host) - { - return traffic_selector_create_from_subnet(host, prefixlen, - sel->proto, port, port ?: 65535); - } - return NULL; -} - -/** - * Process a XFRM_MSG_ACQUIRE from kernel - */ -static void process_acquire(private_kernel_netlink_ipsec_t *this, - struct nlmsghdr *hdr) -{ - struct xfrm_user_acquire *acquire; - struct rtattr *rta; - size_t rtasize; - traffic_selector_t *src_ts, *dst_ts; - u_int32_t reqid = 0; - int proto = 0; - - acquire = NLMSG_DATA(hdr); - rta = XFRM_RTA(hdr, struct xfrm_user_acquire); - rtasize = XFRM_PAYLOAD(hdr, struct xfrm_user_acquire); - - DBG2(DBG_KNL, "received a XFRM_MSG_ACQUIRE"); - - while (RTA_OK(rta, rtasize)) - { - DBG2(DBG_KNL, " %N", xfrm_attr_type_names, rta->rta_type); - - if (rta->rta_type == XFRMA_TMPL) - { - struct xfrm_user_tmpl* tmpl; - tmpl = (struct xfrm_user_tmpl*)RTA_DATA(rta); - reqid = tmpl->reqid; - proto = tmpl->id.proto; - } - rta = RTA_NEXT(rta, rtasize); - } - switch (proto) - { - case 0: - case IPPROTO_ESP: - case IPPROTO_AH: - break; - default: - /* acquire for AH/ESP only, not for IPCOMP */ - return; - } - src_ts = selector2ts(&acquire->sel, TRUE); - dst_ts = selector2ts(&acquire->sel, FALSE); - - hydra->kernel_interface->acquire(hydra->kernel_interface, reqid, src_ts, - dst_ts); -} - -/** - * Process a XFRM_MSG_EXPIRE from kernel - */ -static void process_expire(private_kernel_netlink_ipsec_t *this, - struct nlmsghdr *hdr) -{ - struct xfrm_user_expire *expire; - u_int32_t spi; - u_int8_t protocol; - host_t *dst; - - expire = NLMSG_DATA(hdr); - protocol = expire->state.id.proto; - spi = expire->state.id.spi; - - DBG2(DBG_KNL, "received a XFRM_MSG_EXPIRE"); - - if (protocol == IPPROTO_ESP || protocol == IPPROTO_AH) - { - dst = xfrm2host(expire->state.family, &expire->state.id.daddr, 0); - if (dst) - { - hydra->kernel_interface->expire(hydra->kernel_interface, protocol, - spi, dst, expire->hard != 0); - dst->destroy(dst); - } - } -} - -/** - * Process a XFRM_MSG_MIGRATE from kernel - */ -static void process_migrate(private_kernel_netlink_ipsec_t *this, - struct nlmsghdr *hdr) -{ - struct xfrm_userpolicy_id *policy_id; - struct rtattr *rta; - size_t rtasize; - traffic_selector_t *src_ts, *dst_ts; - host_t *local = NULL, *remote = NULL; - host_t *old_src = NULL, *old_dst = NULL; - host_t *new_src = NULL, *new_dst = NULL; - u_int32_t reqid = 0; - policy_dir_t dir; - - policy_id = NLMSG_DATA(hdr); - rta = XFRM_RTA(hdr, struct xfrm_userpolicy_id); - rtasize = XFRM_PAYLOAD(hdr, struct xfrm_userpolicy_id); - - DBG2(DBG_KNL, "received a XFRM_MSG_MIGRATE"); - - src_ts = selector2ts(&policy_id->sel, TRUE); - dst_ts = selector2ts(&policy_id->sel, FALSE); - dir = (policy_dir_t)policy_id->dir; - - DBG2(DBG_KNL, " policy: %R === %R %N", src_ts, dst_ts, policy_dir_names); - - while (RTA_OK(rta, rtasize)) - { - DBG2(DBG_KNL, " %N", xfrm_attr_type_names, rta->rta_type); - if (rta->rta_type == XFRMA_KMADDRESS) - { - struct xfrm_user_kmaddress *kmaddress; - - kmaddress = (struct xfrm_user_kmaddress*)RTA_DATA(rta); - local = xfrm2host(kmaddress->family, &kmaddress->local, 0); - remote = xfrm2host(kmaddress->family, &kmaddress->remote, 0); - DBG2(DBG_KNL, " kmaddress: %H...%H", local, remote); - } - else if (rta->rta_type == XFRMA_MIGRATE) - { - struct xfrm_user_migrate *migrate; - - migrate = (struct xfrm_user_migrate*)RTA_DATA(rta); - old_src = xfrm2host(migrate->old_family, &migrate->old_saddr, 0); - old_dst = xfrm2host(migrate->old_family, &migrate->old_daddr, 0); - new_src = xfrm2host(migrate->new_family, &migrate->new_saddr, 0); - new_dst = xfrm2host(migrate->new_family, &migrate->new_daddr, 0); - reqid = migrate->reqid; - DBG2(DBG_KNL, " migrate %H...%H to %H...%H, reqid {%u}", - old_src, old_dst, new_src, new_dst, reqid); - DESTROY_IF(old_src); - DESTROY_IF(old_dst); - DESTROY_IF(new_src); - DESTROY_IF(new_dst); - } - rta = RTA_NEXT(rta, rtasize); - } - - if (src_ts && dst_ts && local && remote) - { - hydra->kernel_interface->migrate(hydra->kernel_interface, reqid, - src_ts, dst_ts, dir, local, remote); - } - else - { - DESTROY_IF(src_ts); - DESTROY_IF(dst_ts); - DESTROY_IF(local); - DESTROY_IF(remote); - } -} - -/** - * Process a XFRM_MSG_MAPPING from kernel - */ -static void process_mapping(private_kernel_netlink_ipsec_t *this, - struct nlmsghdr *hdr) -{ - struct xfrm_user_mapping *mapping; - u_int32_t spi; - - mapping = NLMSG_DATA(hdr); - spi = mapping->id.spi; - - DBG2(DBG_KNL, "received a XFRM_MSG_MAPPING"); - - if (mapping->id.proto == IPPROTO_ESP) - { - host_t *dst, *new; - - dst = xfrm2host(mapping->id.family, &mapping->id.daddr, 0); - if (dst) - { - new = xfrm2host(mapping->id.family, &mapping->new_saddr, - mapping->new_sport); - if (new) - { - hydra->kernel_interface->mapping(hydra->kernel_interface, - IPPROTO_ESP, spi, dst, new); - new->destroy(new); - } - dst->destroy(dst); - } - } -} - -/** - * Receives events from kernel - */ -static bool receive_events(private_kernel_netlink_ipsec_t *this, int fd, - watcher_event_t event) -{ - char response[1024]; - struct nlmsghdr *hdr = (struct nlmsghdr*)response; - struct sockaddr_nl addr; - socklen_t addr_len = sizeof(addr); - int len; - - len = recvfrom(this->socket_xfrm_events, response, sizeof(response), - MSG_DONTWAIT, (struct sockaddr*)&addr, &addr_len); - if (len < 0) - { - switch (errno) - { - case EINTR: - /* interrupted, try again */ - return TRUE; - case EAGAIN: - /* no data ready, select again */ - return TRUE; - default: - DBG1(DBG_KNL, "unable to receive from xfrm event socket"); - sleep(1); - return TRUE; - } - } - - if (addr.nl_pid != 0) - { /* not from kernel. not interested, try another one */ - return TRUE; - } - - while (NLMSG_OK(hdr, len)) - { - switch (hdr->nlmsg_type) - { - case XFRM_MSG_ACQUIRE: - process_acquire(this, hdr); - break; - case XFRM_MSG_EXPIRE: - process_expire(this, hdr); - break; - case XFRM_MSG_MIGRATE: - process_migrate(this, hdr); - break; - case XFRM_MSG_MAPPING: - process_mapping(this, hdr); - break; - default: - DBG1(DBG_KNL, "received unknown event from xfrm event " - "socket: %d", hdr->nlmsg_type); - break; - } - hdr = NLMSG_NEXT(hdr, len); - } - return TRUE; -} - -METHOD(kernel_ipsec_t, get_features, kernel_feature_t, - private_kernel_netlink_ipsec_t *this) -{ - return KERNEL_ESP_V3_TFC; -} - -/** - * Get an SPI for a specific protocol from the kernel. - */ -static status_t get_spi_internal(private_kernel_netlink_ipsec_t *this, - host_t *src, host_t *dst, u_int8_t proto, u_int32_t min, u_int32_t max, - u_int32_t *spi) -{ - netlink_buf_t request; - struct nlmsghdr *hdr, *out; - struct xfrm_userspi_info *userspi; - u_int32_t received_spi = 0; - size_t len; - - memset(&request, 0, sizeof(request)); - - hdr = &request.hdr; - hdr->nlmsg_flags = NLM_F_REQUEST; - hdr->nlmsg_type = XFRM_MSG_ALLOCSPI; - hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userspi_info)); - - userspi = NLMSG_DATA(hdr); - host2xfrm(src, &userspi->info.saddr); - host2xfrm(dst, &userspi->info.id.daddr); - userspi->info.id.proto = proto; - userspi->info.mode = XFRM_MODE_TUNNEL; - userspi->info.family = src->get_family(src); - userspi->min = min; - userspi->max = max; - - if (this->socket_xfrm->send(this->socket_xfrm, hdr, &out, &len) == SUCCESS) - { - hdr = out; - while (NLMSG_OK(hdr, len)) - { - switch (hdr->nlmsg_type) - { - case XFRM_MSG_NEWSA: - { - struct xfrm_usersa_info* usersa = NLMSG_DATA(hdr); - received_spi = usersa->id.spi; - break; - } - case NLMSG_ERROR: - { - struct nlmsgerr *err = NLMSG_DATA(hdr); - DBG1(DBG_KNL, "allocating SPI failed: %s (%d)", - strerror(-err->error), -err->error); - break; - } - default: - hdr = NLMSG_NEXT(hdr, len); - continue; - case NLMSG_DONE: - break; - } - break; - } - free(out); - } - - if (received_spi == 0) - { - return FAILED; - } - - *spi = received_spi; - return SUCCESS; -} - -METHOD(kernel_ipsec_t, get_spi, status_t, - private_kernel_netlink_ipsec_t *this, host_t *src, host_t *dst, - u_int8_t protocol, u_int32_t *spi) -{ - if (get_spi_internal(this, src, dst, protocol, - 0xc0000000, 0xcFFFFFFF, spi) != SUCCESS) - { - DBG1(DBG_KNL, "unable to get SPI"); - return FAILED; - } - - DBG2(DBG_KNL, "got SPI %.8x", ntohl(*spi)); - return SUCCESS; -} - -METHOD(kernel_ipsec_t, get_cpi, status_t, - private_kernel_netlink_ipsec_t *this, host_t *src, host_t *dst, - u_int16_t *cpi) -{ - u_int32_t received_spi = 0; - - if (get_spi_internal(this, src, dst, IPPROTO_COMP, - 0x100, 0xEFFF, &received_spi) != SUCCESS) - { - DBG1(DBG_KNL, "unable to get CPI"); - return FAILED; - } - - *cpi = htons((u_int16_t)ntohl(received_spi)); - - DBG2(DBG_KNL, "got CPI %.4x", ntohs(*cpi)); - return SUCCESS; -} - -/** - * Add a XFRM mark to message if required - */ -static bool add_mark(struct nlmsghdr *hdr, int buflen, mark_t mark) -{ - if (mark.value) - { - struct xfrm_mark *xmrk; - - xmrk = netlink_reserve(hdr, buflen, XFRMA_MARK, sizeof(*xmrk)); - if (!xmrk) - { - return FALSE; - } - xmrk->v = mark.value; - xmrk->m = mark.mask; - } - return TRUE; -} - -METHOD(kernel_ipsec_t, add_sa, status_t, - private_kernel_netlink_ipsec_t *this, host_t *src, host_t *dst, - u_int32_t spi, u_int8_t protocol, u_int32_t reqid, mark_t mark, - u_int32_t tfc, lifetime_cfg_t *lifetime, u_int16_t enc_alg, chunk_t enc_key, - u_int16_t int_alg, chunk_t int_key, ipsec_mode_t mode, - u_int16_t ipcomp, u_int16_t cpi, u_int32_t replay_window, - bool initiator, bool encap, bool esn, bool inbound, bool update, - linked_list_t* src_ts, linked_list_t* dst_ts) -{ - netlink_buf_t request; - char *alg_name; - struct nlmsghdr *hdr; - struct xfrm_usersa_info *sa; - u_int16_t icv_size = 64; - ipsec_mode_t original_mode = mode; - traffic_selector_t *first_src_ts, *first_dst_ts; - status_t status = FAILED; - - /* if IPComp is used, we install an additional IPComp SA. if the cpi is 0 - * we are in the recursive call below */ - if (ipcomp != IPCOMP_NONE && cpi != 0) - { - lifetime_cfg_t lft = {{0,0,0},{0,0,0},{0,0,0}}; - add_sa(this, src, dst, htonl(ntohs(cpi)), IPPROTO_COMP, reqid, mark, - tfc, &lft, ENCR_UNDEFINED, chunk_empty, AUTH_UNDEFINED, - chunk_empty, mode, ipcomp, 0, 0, initiator, FALSE, FALSE, - inbound, update, src_ts, dst_ts); - ipcomp = IPCOMP_NONE; - /* use transport mode ESP SA, IPComp uses tunnel mode */ - mode = MODE_TRANSPORT; - } - - memset(&request, 0, sizeof(request)); - - DBG2(DBG_KNL, "adding SAD entry with SPI %.8x and reqid {%u} (mark " - "%u/0x%08x)", ntohl(spi), reqid, mark.value, mark.mask); - - hdr = &request.hdr; - hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; - hdr->nlmsg_type = update ? XFRM_MSG_UPDSA : XFRM_MSG_NEWSA; - hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_info)); - - sa = NLMSG_DATA(hdr); - host2xfrm(src, &sa->saddr); - host2xfrm(dst, &sa->id.daddr); - sa->id.spi = spi; - sa->id.proto = protocol; - sa->family = src->get_family(src); - sa->mode = mode2kernel(mode); - switch (mode) - { - case MODE_TUNNEL: - sa->flags |= XFRM_STATE_AF_UNSPEC; - break; - case MODE_BEET: - case MODE_TRANSPORT: - if (original_mode == MODE_TUNNEL) - { /* don't install selectors for switched SAs. because only one - * selector can be installed other traffic would get dropped */ - break; - } - if (src_ts->get_first(src_ts, (void**)&first_src_ts) == SUCCESS && - dst_ts->get_first(dst_ts, (void**)&first_dst_ts) == SUCCESS) - { - sa->sel = ts2selector(first_src_ts, first_dst_ts); - if (!this->proto_port_transport) - { - /* don't install proto/port on SA. This would break - * potential secondary SAs for the same address using a - * different prot/port. */ - sa->sel.proto = 0; - sa->sel.dport = sa->sel.dport_mask = 0; - sa->sel.sport = sa->sel.sport_mask = 0; - } - } - break; - default: - break; - } - - sa->reqid = reqid; - sa->lft.soft_byte_limit = XFRM_LIMIT(lifetime->bytes.rekey); - sa->lft.hard_byte_limit = XFRM_LIMIT(lifetime->bytes.life); - sa->lft.soft_packet_limit = XFRM_LIMIT(lifetime->packets.rekey); - sa->lft.hard_packet_limit = XFRM_LIMIT(lifetime->packets.life); - /* we use lifetimes since added, not since used */ - sa->lft.soft_add_expires_seconds = lifetime->time.rekey; - sa->lft.hard_add_expires_seconds = lifetime->time.life; - sa->lft.soft_use_expires_seconds = 0; - sa->lft.hard_use_expires_seconds = 0; - - switch (enc_alg) - { - case ENCR_UNDEFINED: - /* no encryption */ - break; - case ENCR_AES_CCM_ICV16: - case ENCR_AES_GCM_ICV16: - case ENCR_NULL_AUTH_AES_GMAC: - case ENCR_CAMELLIA_CCM_ICV16: - case ENCR_CHACHA20_POLY1305: - icv_size += 32; - /* FALL */ - case ENCR_AES_CCM_ICV12: - case ENCR_AES_GCM_ICV12: - case ENCR_CAMELLIA_CCM_ICV12: - icv_size += 32; - /* FALL */ - case ENCR_AES_CCM_ICV8: - case ENCR_AES_GCM_ICV8: - case ENCR_CAMELLIA_CCM_ICV8: - { - struct xfrm_algo_aead *algo; - - alg_name = lookup_algorithm(ENCRYPTION_ALGORITHM, enc_alg); - if (alg_name == NULL) - { - DBG1(DBG_KNL, "algorithm %N not supported by kernel!", - encryption_algorithm_names, enc_alg); - goto failed; - } - DBG2(DBG_KNL, " using encryption algorithm %N with key size %d", - encryption_algorithm_names, enc_alg, enc_key.len * 8); - - algo = netlink_reserve(hdr, sizeof(request), XFRMA_ALG_AEAD, - sizeof(*algo) + enc_key.len); - if (!algo) - { - goto failed; - } - algo->alg_key_len = enc_key.len * 8; - algo->alg_icv_len = icv_size; - strncpy(algo->alg_name, alg_name, sizeof(algo->alg_name)); - algo->alg_name[sizeof(algo->alg_name) - 1] = '\0'; - memcpy(algo->alg_key, enc_key.ptr, enc_key.len); - break; - } - default: - { - struct xfrm_algo *algo; - - alg_name = lookup_algorithm(ENCRYPTION_ALGORITHM, enc_alg); - if (alg_name == NULL) - { - DBG1(DBG_KNL, "algorithm %N not supported by kernel!", - encryption_algorithm_names, enc_alg); - goto failed; - } - DBG2(DBG_KNL, " using encryption algorithm %N with key size %d", - encryption_algorithm_names, enc_alg, enc_key.len * 8); - - algo = netlink_reserve(hdr, sizeof(request), XFRMA_ALG_CRYPT, - sizeof(*algo) + enc_key.len); - if (!algo) - { - goto failed; - } - algo->alg_key_len = enc_key.len * 8; - strncpy(algo->alg_name, alg_name, sizeof(algo->alg_name)); - algo->alg_name[sizeof(algo->alg_name) - 1] = '\0'; - memcpy(algo->alg_key, enc_key.ptr, enc_key.len); - } - } - - if (int_alg != AUTH_UNDEFINED) - { - u_int trunc_len = 0; - - alg_name = lookup_algorithm(INTEGRITY_ALGORITHM, int_alg); - if (alg_name == NULL) - { - DBG1(DBG_KNL, "algorithm %N not supported by kernel!", - integrity_algorithm_names, int_alg); - goto failed; - } - DBG2(DBG_KNL, " using integrity algorithm %N with key size %d", - integrity_algorithm_names, int_alg, int_key.len * 8); - - switch (int_alg) - { - case AUTH_HMAC_MD5_128: - case AUTH_HMAC_SHA2_256_128: - trunc_len = 128; - break; - case AUTH_HMAC_SHA1_160: - trunc_len = 160; - break; - default: - break; - } - - if (trunc_len) - { - struct xfrm_algo_auth* algo; - - /* the kernel uses SHA256 with 96 bit truncation by default, - * use specified truncation size supported by newer kernels. - * also use this for untruncated MD5 and SHA1. */ - algo = netlink_reserve(hdr, sizeof(request), XFRMA_ALG_AUTH_TRUNC, - sizeof(*algo) + int_key.len); - if (!algo) - { - goto failed; - } - algo->alg_key_len = int_key.len * 8; - algo->alg_trunc_len = trunc_len; - strncpy(algo->alg_name, alg_name, sizeof(algo->alg_name)); - algo->alg_name[sizeof(algo->alg_name) - 1] = '\0'; - memcpy(algo->alg_key, int_key.ptr, int_key.len); - } - else - { - struct xfrm_algo* algo; - - algo = netlink_reserve(hdr, sizeof(request), XFRMA_ALG_AUTH, - sizeof(*algo) + int_key.len); - if (!algo) - { - goto failed; - } - algo->alg_key_len = int_key.len * 8; - strncpy(algo->alg_name, alg_name, sizeof(algo->alg_name)); - algo->alg_name[sizeof(algo->alg_name) - 1] = '\0'; - memcpy(algo->alg_key, int_key.ptr, int_key.len); - } - } - - if (ipcomp != IPCOMP_NONE) - { - struct xfrm_algo* algo; - - alg_name = lookup_algorithm(COMPRESSION_ALGORITHM, ipcomp); - if (alg_name == NULL) - { - DBG1(DBG_KNL, "algorithm %N not supported by kernel!", - ipcomp_transform_names, ipcomp); - goto failed; - } - DBG2(DBG_KNL, " using compression algorithm %N", - ipcomp_transform_names, ipcomp); - - algo = netlink_reserve(hdr, sizeof(request), XFRMA_ALG_COMP, - sizeof(*algo)); - if (!algo) - { - goto failed; - } - algo->alg_key_len = 0; - strncpy(algo->alg_name, alg_name, sizeof(algo->alg_name)); - algo->alg_name[sizeof(algo->alg_name) - 1] = '\0'; - } - - if (encap) - { - struct xfrm_encap_tmpl *tmpl; - - tmpl = netlink_reserve(hdr, sizeof(request), XFRMA_ENCAP, sizeof(*tmpl)); - if (!tmpl) - { - goto failed; - } - tmpl->encap_type = UDP_ENCAP_ESPINUDP; - tmpl->encap_sport = htons(src->get_port(src)); - tmpl->encap_dport = htons(dst->get_port(dst)); - memset(&tmpl->encap_oa, 0, sizeof (xfrm_address_t)); - /* encap_oa could probably be derived from the - * traffic selectors [rfc4306, p39]. In the netlink kernel - * implementation pluto does the same as we do here but it uses - * encap_oa in the pfkey implementation. - * BUT as /usr/src/linux/net/key/af_key.c indicates the kernel ignores - * it anyway - * -> does that mean that NAT-T encap doesn't work in transport mode? - * No. The reason the kernel ignores NAT-OA is that it recomputes - * (or, rather, just ignores) the checksum. If packets pass the IPsec - * checks it marks them "checksum ok" so OA isn't needed. */ - } - - if (!add_mark(hdr, sizeof(request), mark)) - { - goto failed; - } - - if (tfc && protocol == IPPROTO_ESP && mode == MODE_TUNNEL) - { /* the kernel supports TFC padding only for tunnel mode ESP SAs */ - u_int32_t *tfcpad; - - tfcpad = netlink_reserve(hdr, sizeof(request), XFRMA_TFCPAD, - sizeof(*tfcpad)); - if (!tfcpad) - { - goto failed; - } - *tfcpad = tfc; - } - - if (protocol != IPPROTO_COMP) - { - if (replay_window != 0 && (esn || replay_window > 32)) - { - /* for ESN or larger replay windows we need the new - * XFRMA_REPLAY_ESN_VAL attribute to configure a bitmap */ - struct xfrm_replay_state_esn *replay; - u_int32_t bmp_size; - - bmp_size = round_up(replay_window, sizeof(u_int32_t) * 8) / 8; - replay = netlink_reserve(hdr, sizeof(request), XFRMA_REPLAY_ESN_VAL, - sizeof(*replay) + bmp_size); - if (!replay) - { - goto failed; - } - /* bmp_len contains number uf __u32's */ - replay->bmp_len = bmp_size / sizeof(u_int32_t); - replay->replay_window = replay_window; - DBG2(DBG_KNL, " using replay window of %u packets", replay_window); - - if (esn) - { - DBG2(DBG_KNL, " using extended sequence numbers (ESN)"); - sa->flags |= XFRM_STATE_ESN; - } - } - else - { - DBG2(DBG_KNL, " using replay window of %u packets", replay_window); - sa->replay_window = replay_window; - } - } - - if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS) - { - if (mark.value) - { - DBG1(DBG_KNL, "unable to add SAD entry with SPI %.8x " - "(mark %u/0x%08x)", ntohl(spi), mark.value, mark.mask); - } - else - { - DBG1(DBG_KNL, "unable to add SAD entry with SPI %.8x", ntohl(spi)); - } - goto failed; - } - - status = SUCCESS; - -failed: - memwipe(&request, sizeof(request)); - return status; -} - -/** - * Get the ESN replay state (i.e. sequence numbers) of an SA. - * - * Allocates into one the replay state structure we get from the kernel. - */ -static void get_replay_state(private_kernel_netlink_ipsec_t *this, - u_int32_t spi, u_int8_t protocol, - host_t *dst, mark_t mark, - struct xfrm_replay_state_esn **replay_esn, - u_int32_t *replay_esn_len, - struct xfrm_replay_state **replay, - struct xfrm_lifetime_cur **lifetime) -{ - netlink_buf_t request; - struct nlmsghdr *hdr, *out = NULL; - struct xfrm_aevent_id *out_aevent = NULL, *aevent_id; - size_t len; - struct rtattr *rta; - size_t rtasize; - - memset(&request, 0, sizeof(request)); - - DBG2(DBG_KNL, "querying replay state from SAD entry with SPI %.8x", - ntohl(spi)); - - hdr = &request.hdr; - hdr->nlmsg_flags = NLM_F_REQUEST; - hdr->nlmsg_type = XFRM_MSG_GETAE; - hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id)); - - aevent_id = NLMSG_DATA(hdr); - aevent_id->flags = XFRM_AE_RVAL; - - host2xfrm(dst, &aevent_id->sa_id.daddr); - aevent_id->sa_id.spi = spi; - aevent_id->sa_id.proto = protocol; - aevent_id->sa_id.family = dst->get_family(dst); - - if (!add_mark(hdr, sizeof(request), mark)) - { - return; - } - - if (this->socket_xfrm->send(this->socket_xfrm, hdr, &out, &len) == SUCCESS) - { - hdr = out; - while (NLMSG_OK(hdr, len)) - { - switch (hdr->nlmsg_type) - { - case XFRM_MSG_NEWAE: - { - out_aevent = NLMSG_DATA(hdr); - break; - } - case NLMSG_ERROR: - { - struct nlmsgerr *err = NLMSG_DATA(hdr); - DBG1(DBG_KNL, "querying replay state from SAD entry " - "failed: %s (%d)", strerror(-err->error), - -err->error); - break; - } - default: - hdr = NLMSG_NEXT(hdr, len); - continue; - case NLMSG_DONE: - break; - } - break; - } - } - - if (out_aevent) - { - rta = XFRM_RTA(out, struct xfrm_aevent_id); - rtasize = XFRM_PAYLOAD(out, struct xfrm_aevent_id); - while (RTA_OK(rta, rtasize)) - { - if (rta->rta_type == XFRMA_LTIME_VAL && - RTA_PAYLOAD(rta) == sizeof(**lifetime)) - { - free(*lifetime); - *lifetime = malloc(RTA_PAYLOAD(rta)); - memcpy(*lifetime, RTA_DATA(rta), RTA_PAYLOAD(rta)); - } - if (rta->rta_type == XFRMA_REPLAY_VAL && - RTA_PAYLOAD(rta) == sizeof(**replay)) - { - free(*replay); - *replay = malloc(RTA_PAYLOAD(rta)); - memcpy(*replay, RTA_DATA(rta), RTA_PAYLOAD(rta)); - } - if (rta->rta_type == XFRMA_REPLAY_ESN_VAL && - RTA_PAYLOAD(rta) >= sizeof(**replay_esn)) - { - free(*replay_esn); - *replay_esn = malloc(RTA_PAYLOAD(rta)); - *replay_esn_len = RTA_PAYLOAD(rta); - memcpy(*replay_esn, RTA_DATA(rta), RTA_PAYLOAD(rta)); - } - rta = RTA_NEXT(rta, rtasize); - } - } - free(out); -} - -METHOD(kernel_ipsec_t, query_sa, status_t, - private_kernel_netlink_ipsec_t *this, host_t *src, host_t *dst, - u_int32_t spi, u_int8_t protocol, mark_t mark, - u_int64_t *bytes, u_int64_t *packets, time_t *time) -{ - netlink_buf_t request; - struct nlmsghdr *out = NULL, *hdr; - struct xfrm_usersa_id *sa_id; - struct xfrm_usersa_info *sa = NULL; - status_t status = FAILED; - size_t len; - - memset(&request, 0, sizeof(request)); - - DBG2(DBG_KNL, "querying SAD entry with SPI %.8x (mark %u/0x%08x)", - ntohl(spi), mark.value, mark.mask); - - hdr = &request.hdr; - hdr->nlmsg_flags = NLM_F_REQUEST; - hdr->nlmsg_type = XFRM_MSG_GETSA; - hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_id)); - - sa_id = NLMSG_DATA(hdr); - host2xfrm(dst, &sa_id->daddr); - sa_id->spi = spi; - sa_id->proto = protocol; - sa_id->family = dst->get_family(dst); - - if (!add_mark(hdr, sizeof(request), mark)) - { - return FAILED; - } - - if (this->socket_xfrm->send(this->socket_xfrm, hdr, &out, &len) == SUCCESS) - { - hdr = out; - while (NLMSG_OK(hdr, len)) - { - switch (hdr->nlmsg_type) - { - case XFRM_MSG_NEWSA: - { - sa = NLMSG_DATA(hdr); - break; - } - case NLMSG_ERROR: - { - struct nlmsgerr *err = NLMSG_DATA(hdr); - - if (mark.value) - { - DBG1(DBG_KNL, "querying SAD entry with SPI %.8x " - "(mark %u/0x%08x) failed: %s (%d)", - ntohl(spi), mark.value, mark.mask, - strerror(-err->error), -err->error); - } - else - { - DBG1(DBG_KNL, "querying SAD entry with SPI %.8x " - "failed: %s (%d)", ntohl(spi), - strerror(-err->error), -err->error); - } - break; - } - default: - hdr = NLMSG_NEXT(hdr, len); - continue; - case NLMSG_DONE: - break; - } - break; - } - } - - if (sa == NULL) - { - DBG2(DBG_KNL, "unable to query SAD entry with SPI %.8x", ntohl(spi)); - } - else - { - if (bytes) - { - *bytes = sa->curlft.bytes; - } - if (packets) - { - *packets = sa->curlft.packets; - } - if (time) - { /* curlft contains an "use" time, but that contains a timestamp - * of the first use, not the last. Last use time must be queried - * on the policy on Linux */ - *time = 0; - } - status = SUCCESS; - } - memwipe(out, len); - free(out); - return status; -} - -METHOD(kernel_ipsec_t, del_sa, status_t, - private_kernel_netlink_ipsec_t *this, host_t *src, host_t *dst, - u_int32_t spi, u_int8_t protocol, u_int16_t cpi, mark_t mark) -{ - netlink_buf_t request; - struct nlmsghdr *hdr; - struct xfrm_usersa_id *sa_id; - - /* if IPComp was used, we first delete the additional IPComp SA */ - if (cpi) - { - del_sa(this, src, dst, htonl(ntohs(cpi)), IPPROTO_COMP, 0, mark); - } - - memset(&request, 0, sizeof(request)); - - DBG2(DBG_KNL, "deleting SAD entry with SPI %.8x (mark %u/0x%08x)", - ntohl(spi), mark.value, mark.mask); - - hdr = &request.hdr; - hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; - hdr->nlmsg_type = XFRM_MSG_DELSA; - hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_id)); - - sa_id = NLMSG_DATA(hdr); - host2xfrm(dst, &sa_id->daddr); - sa_id->spi = spi; - sa_id->proto = protocol; - sa_id->family = dst->get_family(dst); - - if (!add_mark(hdr, sizeof(request), mark)) - { - return FAILED; - } - - switch (this->socket_xfrm->send_ack(this->socket_xfrm, hdr)) - { - case SUCCESS: - DBG2(DBG_KNL, "deleted SAD entry with SPI %.8x (mark %u/0x%08x)", - ntohl(spi), mark.value, mark.mask); - return SUCCESS; - case NOT_FOUND: - return NOT_FOUND; - default: - if (mark.value) - { - DBG1(DBG_KNL, "unable to delete SAD entry with SPI %.8x " - "(mark %u/0x%08x)", ntohl(spi), mark.value, mark.mask); - } - else - { - DBG1(DBG_KNL, "unable to delete SAD entry with SPI %.8x", - ntohl(spi)); - } - return FAILED; - } -} - -METHOD(kernel_ipsec_t, update_sa, status_t, - private_kernel_netlink_ipsec_t *this, u_int32_t spi, u_int8_t protocol, - u_int16_t cpi, host_t *src, host_t *dst, host_t *new_src, host_t *new_dst, - bool old_encap, bool new_encap, mark_t mark) -{ - netlink_buf_t request; - struct nlmsghdr *hdr, *out = NULL; - struct xfrm_usersa_id *sa_id; - struct xfrm_usersa_info *out_sa = NULL, *sa; - size_t len; - struct rtattr *rta; - size_t rtasize; - struct xfrm_encap_tmpl* tmpl = NULL; - struct xfrm_replay_state *replay = NULL; - struct xfrm_replay_state_esn *replay_esn = NULL; - struct xfrm_lifetime_cur *lifetime = NULL; - u_int32_t replay_esn_len = 0; - status_t status = FAILED; - - /* if IPComp is used, we first update the IPComp SA */ - if (cpi) - { - update_sa(this, htonl(ntohs(cpi)), IPPROTO_COMP, 0, - src, dst, new_src, new_dst, FALSE, FALSE, mark); - } - - memset(&request, 0, sizeof(request)); - - DBG2(DBG_KNL, "querying SAD entry with SPI %.8x for update", ntohl(spi)); - - /* query the existing SA first */ - hdr = &request.hdr; - hdr->nlmsg_flags = NLM_F_REQUEST; - hdr->nlmsg_type = XFRM_MSG_GETSA; - hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_id)); - - sa_id = NLMSG_DATA(hdr); - host2xfrm(dst, &sa_id->daddr); - sa_id->spi = spi; - sa_id->proto = protocol; - sa_id->family = dst->get_family(dst); - - if (!add_mark(hdr, sizeof(request), mark)) - { - return FAILED; - } - - if (this->socket_xfrm->send(this->socket_xfrm, hdr, &out, &len) == SUCCESS) - { - hdr = out; - while (NLMSG_OK(hdr, len)) - { - switch (hdr->nlmsg_type) - { - case XFRM_MSG_NEWSA: - { - out_sa = NLMSG_DATA(hdr); - break; - } - case NLMSG_ERROR: - { - struct nlmsgerr *err = NLMSG_DATA(hdr); - DBG1(DBG_KNL, "querying SAD entry failed: %s (%d)", - strerror(-err->error), -err->error); - break; - } - default: - hdr = NLMSG_NEXT(hdr, len); - continue; - case NLMSG_DONE: - break; - } - break; - } - } - if (out_sa == NULL) - { - DBG1(DBG_KNL, "unable to update SAD entry with SPI %.8x", ntohl(spi)); - goto failed; - } - - get_replay_state(this, spi, protocol, dst, mark, &replay_esn, - &replay_esn_len, &replay, &lifetime); - - /* delete the old SA (without affecting the IPComp SA) */ - if (del_sa(this, src, dst, spi, protocol, 0, mark) != SUCCESS) - { - DBG1(DBG_KNL, "unable to delete old SAD entry with SPI %.8x", - ntohl(spi)); - goto failed; - } - - DBG2(DBG_KNL, "updating SAD entry with SPI %.8x from %#H..%#H to %#H..%#H", - ntohl(spi), src, dst, new_src, new_dst); - /* copy over the SA from out to request */ - hdr = &request.hdr; - hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; - hdr->nlmsg_type = XFRM_MSG_NEWSA; - hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_info)); - sa = NLMSG_DATA(hdr); - memcpy(sa, NLMSG_DATA(out), sizeof(struct xfrm_usersa_info)); - sa->family = new_dst->get_family(new_dst); - - if (!src->ip_equals(src, new_src)) - { - host2xfrm(new_src, &sa->saddr); - } - if (!dst->ip_equals(dst, new_dst)) - { - host2xfrm(new_dst, &sa->id.daddr); - } - - rta = XFRM_RTA(out, struct xfrm_usersa_info); - rtasize = XFRM_PAYLOAD(out, struct xfrm_usersa_info); - while (RTA_OK(rta, rtasize)) - { - /* copy all attributes, but not XFRMA_ENCAP if we are disabling it */ - if (rta->rta_type != XFRMA_ENCAP || new_encap) - { - if (rta->rta_type == XFRMA_ENCAP) - { /* update encap tmpl */ - tmpl = RTA_DATA(rta); - tmpl->encap_sport = ntohs(new_src->get_port(new_src)); - tmpl->encap_dport = ntohs(new_dst->get_port(new_dst)); - } - netlink_add_attribute(hdr, rta->rta_type, - chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta)), - sizeof(request)); - } - rta = RTA_NEXT(rta, rtasize); - } - - if (tmpl == NULL && new_encap) - { /* add tmpl if we are enabling it */ - tmpl = netlink_reserve(hdr, sizeof(request), XFRMA_ENCAP, sizeof(*tmpl)); - if (!tmpl) - { - goto failed; - } - tmpl->encap_type = UDP_ENCAP_ESPINUDP; - tmpl->encap_sport = ntohs(new_src->get_port(new_src)); - tmpl->encap_dport = ntohs(new_dst->get_port(new_dst)); - memset(&tmpl->encap_oa, 0, sizeof (xfrm_address_t)); - } - - if (replay_esn) - { - struct xfrm_replay_state_esn *state; - - state = netlink_reserve(hdr, sizeof(request), XFRMA_REPLAY_ESN_VAL, - replay_esn_len); - if (!state) - { - goto failed; - } - memcpy(state, replay_esn, replay_esn_len); - } - else if (replay) - { - struct xfrm_replay_state *state; - - state = netlink_reserve(hdr, sizeof(request), XFRMA_REPLAY_VAL, - sizeof(*state)); - if (!state) - { - goto failed; - } - memcpy(state, replay, sizeof(*state)); - } - else - { - DBG1(DBG_KNL, "unable to copy replay state from old SAD entry with " - "SPI %.8x", ntohl(spi)); - } - if (lifetime) - { - struct xfrm_lifetime_cur *state; - - state = netlink_reserve(hdr, sizeof(request), XFRMA_LTIME_VAL, - sizeof(*state)); - if (!state) - { - goto failed; - } - memcpy(state, lifetime, sizeof(*state)); - } - else - { - DBG1(DBG_KNL, "unable to copy usage stats from old SAD entry with " - "SPI %.8x", ntohl(spi)); - } - - if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS) - { - DBG1(DBG_KNL, "unable to update SAD entry with SPI %.8x", ntohl(spi)); - goto failed; - } - - status = SUCCESS; -failed: - free(replay); - free(replay_esn); - free(lifetime); - memwipe(out, len); - memwipe(&request, sizeof(request)); - free(out); - - return status; -} - -METHOD(kernel_ipsec_t, flush_sas, status_t, - private_kernel_netlink_ipsec_t *this) -{ - netlink_buf_t request; - struct nlmsghdr *hdr; - struct xfrm_usersa_flush *flush; - struct { - u_int8_t proto; - char *name; - } protos[] = { - { IPPROTO_AH, "AH" }, - { IPPROTO_ESP, "ESP" }, - { IPPROTO_COMP, "IPComp" }, - }; - int i; - - memset(&request, 0, sizeof(request)); - - hdr = &request.hdr; - hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; - hdr->nlmsg_type = XFRM_MSG_FLUSHSA; - hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush)); - - flush = NLMSG_DATA(hdr); - - for (i = 0; i < countof(protos); i++) - { - DBG2(DBG_KNL, "flushing all %s SAD entries", protos[i].name); - - flush->proto = protos[i].proto; - - if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS) - { - DBG1(DBG_KNL, "unable to flush %s SAD entries", protos[i].name); - return FAILED; - } - } - return SUCCESS; -} - -/** - * Add or update a policy in the kernel. - * - * Note: The mutex has to be locked when entering this function - * and is unlocked here in any case. - */ -static status_t add_policy_internal(private_kernel_netlink_ipsec_t *this, - policy_entry_t *policy, policy_sa_t *mapping, bool update) -{ - netlink_buf_t request; - policy_entry_t clone; - ipsec_sa_t *ipsec = mapping->sa; - struct xfrm_userpolicy_info *policy_info; - struct nlmsghdr *hdr; - status_t status; - int i; - - /* clone the policy so we are able to check it out again later */ - memcpy(&clone, policy, sizeof(policy_entry_t)); - - memset(&request, 0, sizeof(request)); - hdr = &request.hdr; - hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; - hdr->nlmsg_type = update ? XFRM_MSG_UPDPOLICY : XFRM_MSG_NEWPOLICY; - hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userpolicy_info)); - - policy_info = NLMSG_DATA(hdr); - policy_info->sel = policy->sel; - policy_info->dir = policy->direction; - - /* calculate priority based on selector size, small size = high prio */ - policy_info->priority = mapping->priority; - policy_info->action = mapping->type != POLICY_DROP ? XFRM_POLICY_ALLOW - : XFRM_POLICY_BLOCK; - policy_info->share = XFRM_SHARE_ANY; - - /* policies don't expire */ - policy_info->lft.soft_byte_limit = XFRM_INF; - policy_info->lft.soft_packet_limit = XFRM_INF; - policy_info->lft.hard_byte_limit = XFRM_INF; - policy_info->lft.hard_packet_limit = XFRM_INF; - policy_info->lft.soft_add_expires_seconds = 0; - policy_info->lft.hard_add_expires_seconds = 0; - policy_info->lft.soft_use_expires_seconds = 0; - policy_info->lft.hard_use_expires_seconds = 0; - - if (mapping->type == POLICY_IPSEC) - { - struct xfrm_user_tmpl *tmpl; - struct { - u_int8_t proto; - bool use; - } protos[] = { - { IPPROTO_COMP, ipsec->cfg.ipcomp.transform != IPCOMP_NONE }, - { IPPROTO_ESP, ipsec->cfg.esp.use }, - { IPPROTO_AH, ipsec->cfg.ah.use }, - }; - ipsec_mode_t proto_mode = ipsec->cfg.mode; - int count = 0; - - for (i = 0; i < countof(protos); i++) - { - if (protos[i].use) - { - count++; - } - } - tmpl = netlink_reserve(hdr, sizeof(request), XFRMA_TMPL, - count * sizeof(*tmpl)); - if (!tmpl) - { - this->mutex->unlock(this->mutex); - return FAILED; - } - - for (i = 0; i < countof(protos); i++) - { - if (!protos[i].use) - { - continue; - } - tmpl->reqid = ipsec->cfg.reqid; - tmpl->id.proto = protos[i].proto; - tmpl->aalgos = tmpl->ealgos = tmpl->calgos = ~0; - tmpl->mode = mode2kernel(proto_mode); - tmpl->optional = protos[i].proto == IPPROTO_COMP && - policy->direction != POLICY_OUT; - tmpl->family = ipsec->src->get_family(ipsec->src); - - if (proto_mode == MODE_TUNNEL || proto_mode == MODE_BEET) - { /* only for tunnel mode */ - host2xfrm(ipsec->src, &tmpl->saddr); - host2xfrm(ipsec->dst, &tmpl->id.daddr); - } - - tmpl++; - - /* use transport mode for other SAs */ - proto_mode = MODE_TRANSPORT; - } - } - - if (!add_mark(hdr, sizeof(request), ipsec->mark)) - { - this->mutex->unlock(this->mutex); - return FAILED; - } - this->mutex->unlock(this->mutex); - - status = this->socket_xfrm->send_ack(this->socket_xfrm, hdr); - if (status == ALREADY_DONE && !update) - { - DBG1(DBG_KNL, "policy already exists, try to update it"); - hdr->nlmsg_type = XFRM_MSG_UPDPOLICY; - status = this->socket_xfrm->send_ack(this->socket_xfrm, hdr); - } - if (status != SUCCESS) - { - return FAILED; - } - - /* find the policy again */ - this->mutex->lock(this->mutex); - policy = this->policies->get(this->policies, &clone); - if (!policy || - policy->used_by->find_first(policy->used_by, - NULL, (void**)&mapping) != SUCCESS) - { /* policy or mapping is already gone, ignore */ - this->mutex->unlock(this->mutex); - return SUCCESS; - } - - /* install a route, if: - * - this is a forward policy (to just get one for each child) - * - we are in tunnel/BEET mode or install a bypass policy - * - routing is not disabled via strongswan.conf - */ - if (policy->direction == POLICY_FWD && this->install_routes && - (mapping->type != POLICY_IPSEC || ipsec->cfg.mode != MODE_TRANSPORT)) - { - policy_sa_fwd_t *fwd = (policy_sa_fwd_t*)mapping; - route_entry_t *route; - host_t *iface; - - INIT(route, - .prefixlen = policy->sel.prefixlen_s, - ); - - if (hydra->kernel_interface->get_address_by_ts(hydra->kernel_interface, - fwd->dst_ts, &route->src_ip, NULL) == SUCCESS) - { - /* get the nexthop to src (src as we are in POLICY_FWD) */ - if (!ipsec->src->is_anyaddr(ipsec->src)) - { - route->gateway = hydra->kernel_interface->get_nexthop( - hydra->kernel_interface, ipsec->src, - -1, ipsec->dst); - } - else - { /* for shunt policies */ - iface = xfrm2host(policy->sel.family, &policy->sel.saddr, 0); - route->gateway = hydra->kernel_interface->get_nexthop( - hydra->kernel_interface, iface, - policy->sel.prefixlen_s, route->src_ip); - iface->destroy(iface); - } - route->dst_net = chunk_alloc(policy->sel.family == AF_INET ? 4 : 16); - memcpy(route->dst_net.ptr, &policy->sel.saddr, route->dst_net.len); - - /* get the interface to install the route for. If we have a local - * address, use it. Otherwise (for shunt policies) use the - * routes source address. */ - iface = ipsec->dst; - if (iface->is_anyaddr(iface)) - { - iface = route->src_ip; - } - /* install route via outgoing interface */ - if (!hydra->kernel_interface->get_interface(hydra->kernel_interface, - iface, &route->if_name)) - { - this->mutex->unlock(this->mutex); - route_entry_destroy(route); - return SUCCESS; - } - - if (policy->route) - { - route_entry_t *old = policy->route; - if (route_entry_equals(old, route)) - { - this->mutex->unlock(this->mutex); - route_entry_destroy(route); - return SUCCESS; - } - /* uninstall previously installed route */ - if (hydra->kernel_interface->del_route(hydra->kernel_interface, - old->dst_net, old->prefixlen, old->gateway, - old->src_ip, old->if_name) != SUCCESS) - { - DBG1(DBG_KNL, "error uninstalling route installed with " - "policy %R === %R %N", fwd->src_ts, - fwd->dst_ts, policy_dir_names, - policy->direction); - } - route_entry_destroy(old); - policy->route = NULL; - } - - DBG2(DBG_KNL, "installing route: %R via %H src %H dev %s", - fwd->src_ts, route->gateway, route->src_ip, route->if_name); - switch (hydra->kernel_interface->add_route( - hydra->kernel_interface, route->dst_net, - route->prefixlen, route->gateway, - route->src_ip, route->if_name)) - { - default: - DBG1(DBG_KNL, "unable to install source route for %H", - route->src_ip); - /* FALL */ - case ALREADY_DONE: - /* route exists, do not uninstall */ - route_entry_destroy(route); - break; - case SUCCESS: - /* cache the installed route */ - policy->route = route; - break; - } - } - else - { - free(route); - } - } - this->mutex->unlock(this->mutex); - return SUCCESS; -} - -METHOD(kernel_ipsec_t, add_policy, status_t, - private_kernel_netlink_ipsec_t *this, host_t *src, host_t *dst, - traffic_selector_t *src_ts, traffic_selector_t *dst_ts, - policy_dir_t direction, policy_type_t type, ipsec_sa_cfg_t *sa, - mark_t mark, policy_priority_t priority) -{ - policy_entry_t *policy, *current; - policy_sa_t *assigned_sa, *current_sa; - enumerator_t *enumerator; - bool found = FALSE, update = TRUE; - - /* create a policy */ - INIT(policy, - .sel = ts2selector(src_ts, dst_ts), - .mark = mark.value & mark.mask, - .direction = direction, - .reqid = sa->reqid, - ); - - /* find the policy, which matches EXACTLY */ - this->mutex->lock(this->mutex); - current = this->policies->get(this->policies, policy); - if (current) - { - if (current->reqid && sa->reqid && current->reqid != sa->reqid) - { - DBG1(DBG_CFG, "unable to install policy %R === %R %N (mark " - "%u/0x%08x) for reqid %u, the same policy for reqid %u exists", - src_ts, dst_ts, policy_dir_names, direction, - mark.value, mark.mask, sa->reqid, current->reqid); - policy_entry_destroy(this, policy); - this->mutex->unlock(this->mutex); - return INVALID_STATE; - } - /* use existing policy */ - DBG2(DBG_KNL, "policy %R === %R %N (mark %u/0x%08x) " - "already exists, increasing refcount", - src_ts, dst_ts, policy_dir_names, direction, - mark.value, mark.mask); - policy_entry_destroy(this, policy); - policy = current; - found = TRUE; - } - else - { /* use the new one, if we have no such policy */ - policy->used_by = linked_list_create(); - this->policies->put(this->policies, policy, policy); - } - - /* cache the assigned IPsec SA */ - assigned_sa = policy_sa_create(this, direction, type, src, dst, src_ts, - dst_ts, mark, sa); - assigned_sa->priority = get_priority(policy, priority); - - /* insert the SA according to its priority */ - enumerator = policy->used_by->create_enumerator(policy->used_by); - while (enumerator->enumerate(enumerator, (void**)¤t_sa)) - { - if (current_sa->priority >= assigned_sa->priority) - { - break; - } - update = FALSE; - } - policy->used_by->insert_before(policy->used_by, enumerator, - assigned_sa); - enumerator->destroy(enumerator); - - if (!update) - { /* we don't update the policy if the priority is lower than that of - * the currently installed one */ - this->mutex->unlock(this->mutex); - return SUCCESS; - } - - if (this->policy_update) - { - found = TRUE; - } - - DBG2(DBG_KNL, "%s policy %R === %R %N (mark %u/0x%08x)", - found ? "updating" : "adding", src_ts, dst_ts, - policy_dir_names, direction, mark.value, mark.mask); - - if (add_policy_internal(this, policy, assigned_sa, found) != SUCCESS) - { - DBG1(DBG_KNL, "unable to %s policy %R === %R %N", - found ? "update" : "add", src_ts, dst_ts, - policy_dir_names, direction); - return FAILED; - } - return SUCCESS; -} - -METHOD(kernel_ipsec_t, query_policy, status_t, - private_kernel_netlink_ipsec_t *this, traffic_selector_t *src_ts, - traffic_selector_t *dst_ts, policy_dir_t direction, mark_t mark, - time_t *use_time) -{ - netlink_buf_t request; - struct nlmsghdr *out = NULL, *hdr; - struct xfrm_userpolicy_id *policy_id; - struct xfrm_userpolicy_info *policy = NULL; - size_t len; - - memset(&request, 0, sizeof(request)); - - DBG2(DBG_KNL, "querying policy %R === %R %N (mark %u/0x%08x)", - src_ts, dst_ts, policy_dir_names, direction, - mark.value, mark.mask); - - hdr = &request.hdr; - hdr->nlmsg_flags = NLM_F_REQUEST; - hdr->nlmsg_type = XFRM_MSG_GETPOLICY; - hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userpolicy_id)); - - policy_id = NLMSG_DATA(hdr); - policy_id->sel = ts2selector(src_ts, dst_ts); - policy_id->dir = direction; - - if (!add_mark(hdr, sizeof(request), mark)) - { - return FAILED; - } - - if (this->socket_xfrm->send(this->socket_xfrm, hdr, &out, &len) == SUCCESS) - { - hdr = out; - while (NLMSG_OK(hdr, len)) - { - switch (hdr->nlmsg_type) - { - case XFRM_MSG_NEWPOLICY: - { - policy = NLMSG_DATA(hdr); - break; - } - case NLMSG_ERROR: - { - struct nlmsgerr *err = NLMSG_DATA(hdr); - DBG1(DBG_KNL, "querying policy failed: %s (%d)", - strerror(-err->error), -err->error); - break; - } - default: - hdr = NLMSG_NEXT(hdr, len); - continue; - case NLMSG_DONE: - break; - } - break; - } - } - - if (policy == NULL) - { - DBG2(DBG_KNL, "unable to query policy %R === %R %N", src_ts, dst_ts, - policy_dir_names, direction); - free(out); - return FAILED; - } - - if (policy->curlft.use_time) - { - /* we need the monotonic time, but the kernel returns system time. */ - *use_time = time_monotonic(NULL) - (time(NULL) - policy->curlft.use_time); - } - else - { - *use_time = 0; - } - - free(out); - return SUCCESS; -} - -METHOD(kernel_ipsec_t, del_policy, status_t, - private_kernel_netlink_ipsec_t *this, host_t *src, host_t *dst, - traffic_selector_t *src_ts, traffic_selector_t *dst_ts, - policy_dir_t direction, policy_type_t type, ipsec_sa_cfg_t *sa, - mark_t mark, policy_priority_t prio) -{ - policy_entry_t *current, policy; - enumerator_t *enumerator; - policy_sa_t *mapping; - netlink_buf_t request; - struct nlmsghdr *hdr; - struct xfrm_userpolicy_id *policy_id; - bool is_installed = TRUE; - u_int32_t priority; - ipsec_sa_t assigned_sa = { - .src = src, - .dst = dst, - .mark = mark, - .cfg = *sa, - }; - - DBG2(DBG_KNL, "deleting policy %R === %R %N (mark %u/0x%08x)", - src_ts, dst_ts, policy_dir_names, direction, - mark.value, mark.mask); - - /* create a policy */ - memset(&policy, 0, sizeof(policy_entry_t)); - policy.sel = ts2selector(src_ts, dst_ts); - policy.mark = mark.value & mark.mask; - policy.direction = direction; - - /* find the policy */ - this->mutex->lock(this->mutex); - current = this->policies->get(this->policies, &policy); - if (!current) - { - if (mark.value) - { - DBG1(DBG_KNL, "deleting policy %R === %R %N (mark %u/0x%08x) " - "failed, not found", src_ts, dst_ts, policy_dir_names, - direction, mark.value, mark.mask); - } - else - { - DBG1(DBG_KNL, "deleting policy %R === %R %N failed, not found", - src_ts, dst_ts, policy_dir_names, direction); - } - this->mutex->unlock(this->mutex); - return NOT_FOUND; - } - - /* remove mapping to SA by reqid and priority */ - priority = get_priority(current, prio); - enumerator = current->used_by->create_enumerator(current->used_by); - while (enumerator->enumerate(enumerator, (void**)&mapping)) - { - if (priority == mapping->priority && type == mapping->type && - ipsec_sa_equals(mapping->sa, &assigned_sa)) - { - current->used_by->remove_at(current->used_by, enumerator); - policy_sa_destroy(mapping, &direction, this); - break; - } - is_installed = FALSE; - } - enumerator->destroy(enumerator); - - if (current->used_by->get_count(current->used_by) > 0) - { /* policy is used by more SAs, keep in kernel */ - DBG2(DBG_KNL, "policy still used by another CHILD_SA, not removed"); - if (!is_installed) - { /* no need to update as the policy was not installed for this SA */ - this->mutex->unlock(this->mutex); - return SUCCESS; - } - - DBG2(DBG_KNL, "updating policy %R === %R %N (mark %u/0x%08x)", - src_ts, dst_ts, policy_dir_names, direction, - mark.value, mark.mask); - - current->used_by->get_first(current->used_by, (void**)&mapping); - if (add_policy_internal(this, current, mapping, TRUE) != SUCCESS) - { - DBG1(DBG_KNL, "unable to update policy %R === %R %N", - src_ts, dst_ts, policy_dir_names, direction); - return FAILED; - } - return SUCCESS; - } - - memset(&request, 0, sizeof(request)); - - hdr = &request.hdr; - hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; - hdr->nlmsg_type = XFRM_MSG_DELPOLICY; - hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userpolicy_id)); - - policy_id = NLMSG_DATA(hdr); - policy_id->sel = current->sel; - policy_id->dir = direction; - - if (!add_mark(hdr, sizeof(request), mark)) - { - this->mutex->unlock(this->mutex); - return FAILED; - } - - if (current->route) - { - route_entry_t *route = current->route; - if (hydra->kernel_interface->del_route(hydra->kernel_interface, - route->dst_net, route->prefixlen, route->gateway, - route->src_ip, route->if_name) != SUCCESS) - { - DBG1(DBG_KNL, "error uninstalling route installed with " - "policy %R === %R %N", src_ts, dst_ts, - policy_dir_names, direction); - } - } - - this->policies->remove(this->policies, current); - policy_entry_destroy(this, current); - this->mutex->unlock(this->mutex); - - if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS) - { - if (mark.value) - { - DBG1(DBG_KNL, "unable to delete policy %R === %R %N " - "(mark %u/0x%08x)", src_ts, dst_ts, policy_dir_names, - direction, mark.value, mark.mask); - } - else - { - DBG1(DBG_KNL, "unable to delete policy %R === %R %N", - src_ts, dst_ts, policy_dir_names, direction); - } - return FAILED; - } - return SUCCESS; -} - -METHOD(kernel_ipsec_t, flush_policies, status_t, - private_kernel_netlink_ipsec_t *this) -{ - netlink_buf_t request; - struct nlmsghdr *hdr; - - memset(&request, 0, sizeof(request)); - - DBG2(DBG_KNL, "flushing all policies from SPD"); - - hdr = &request.hdr; - hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; - hdr->nlmsg_type = XFRM_MSG_FLUSHPOLICY; - hdr->nlmsg_len = NLMSG_LENGTH(0); /* no data associated */ - - /* by adding an rtattr of type XFRMA_POLICY_TYPE we could restrict this - * to main or sub policies (default is main) */ - - if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS) - { - DBG1(DBG_KNL, "unable to flush SPD entries"); - return FAILED; - } - return SUCCESS; -} - -/** - * Bypass socket using a per-socket policy - */ -static bool add_socket_bypass(private_kernel_netlink_ipsec_t *this, - int fd, int family) -{ - struct xfrm_userpolicy_info policy; - u_int sol, ipsec_policy; - - switch (family) - { - case AF_INET: - sol = SOL_IP; - ipsec_policy = IP_XFRM_POLICY; - break; - case AF_INET6: - sol = SOL_IPV6; - ipsec_policy = IPV6_XFRM_POLICY; - break; - default: - return FALSE; - } - - memset(&policy, 0, sizeof(policy)); - policy.action = XFRM_POLICY_ALLOW; - policy.sel.family = family; - - policy.dir = XFRM_POLICY_OUT; - if (setsockopt(fd, sol, ipsec_policy, &policy, sizeof(policy)) < 0) - { - DBG1(DBG_KNL, "unable to set IPSEC_POLICY on socket: %s", - strerror(errno)); - return FALSE; - } - policy.dir = XFRM_POLICY_IN; - if (setsockopt(fd, sol, ipsec_policy, &policy, sizeof(policy)) < 0) - { - DBG1(DBG_KNL, "unable to set IPSEC_POLICY on socket: %s", - strerror(errno)); - return FALSE; - } - return TRUE; -} - -/** - * Port based IKE bypass policy - */ -typedef struct { - /** address family */ - int family; - /** layer 4 protocol */ - int proto; - /** port number, network order */ - u_int16_t port; -} bypass_t; - -/** - * Add or remove a bypass policy from/to kernel - */ -static bool manage_bypass(private_kernel_netlink_ipsec_t *this, - int type, policy_dir_t dir, bypass_t *bypass) -{ - netlink_buf_t request; - struct xfrm_selector *sel; - struct nlmsghdr *hdr; - - memset(&request, 0, sizeof(request)); - hdr = &request.hdr; - hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; - hdr->nlmsg_type = type; - - if (type == XFRM_MSG_NEWPOLICY) - { - struct xfrm_userpolicy_info *policy; - - hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userpolicy_info)); - - policy = NLMSG_DATA(hdr); - policy->dir = dir; - policy->priority = 32; - policy->action = XFRM_POLICY_ALLOW; - policy->share = XFRM_SHARE_ANY; - - policy->lft.soft_byte_limit = XFRM_INF; - policy->lft.soft_packet_limit = XFRM_INF; - policy->lft.hard_byte_limit = XFRM_INF; - policy->lft.hard_packet_limit = XFRM_INF; - - sel = &policy->sel; - } - else /* XFRM_MSG_DELPOLICY */ - { - struct xfrm_userpolicy_id *policy; - - hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userpolicy_id)); - - policy = NLMSG_DATA(hdr); - policy->dir = dir; - - sel = &policy->sel; - } - - sel->family = bypass->family; - sel->proto = bypass->proto; - if (dir == POLICY_IN) - { - sel->dport = bypass->port; - sel->dport_mask = 0xffff; - } - else - { - sel->sport = bypass->port; - sel->sport_mask = 0xffff; - } - return this->socket_xfrm->send_ack(this->socket_xfrm, hdr) == SUCCESS; -} - -/** - * Bypass socket using a port-based bypass policy - */ -static bool add_port_bypass(private_kernel_netlink_ipsec_t *this, - int fd, int family) -{ - union { - struct sockaddr sa; - struct sockaddr_in in; - struct sockaddr_in6 in6; - } saddr; - socklen_t len; - bypass_t bypass = { - .family = family, - }; - - len = sizeof(saddr); - if (getsockname(fd, &saddr.sa, &len) != 0) - { - return FALSE; - } -#ifdef SO_PROTOCOL /* since 2.6.32 */ - len = sizeof(bypass.proto); - if (getsockopt(fd, SOL_SOCKET, SO_PROTOCOL, &bypass.proto, &len) != 0) -#endif - { /* assume UDP if SO_PROTOCOL not supported */ - bypass.proto = IPPROTO_UDP; - } - switch (family) - { - case AF_INET: - bypass.port = saddr.in.sin_port; - break; - case AF_INET6: - bypass.port = saddr.in6.sin6_port; - break; - default: - return FALSE; - } - - if (!manage_bypass(this, XFRM_MSG_NEWPOLICY, POLICY_IN, &bypass)) - { - return FALSE; - } - if (!manage_bypass(this, XFRM_MSG_NEWPOLICY, POLICY_OUT, &bypass)) - { - manage_bypass(this, XFRM_MSG_DELPOLICY, POLICY_IN, &bypass); - return FALSE; - } - array_insert(this->bypass, ARRAY_TAIL, &bypass); - - return TRUE; -} - -/** - * Remove installed port based bypass policy - */ -static void remove_port_bypass(bypass_t *bypass, int idx, - private_kernel_netlink_ipsec_t *this) -{ - manage_bypass(this, XFRM_MSG_DELPOLICY, POLICY_OUT, bypass); - manage_bypass(this, XFRM_MSG_DELPOLICY, POLICY_IN, bypass); -} - -METHOD(kernel_ipsec_t, bypass_socket, bool, - private_kernel_netlink_ipsec_t *this, int fd, int family) -{ - if (lib->settings->get_bool(lib->settings, - "%s.plugins.kernel-netlink.port_bypass", FALSE, lib->ns)) - { - return add_port_bypass(this, fd, family); - } - return add_socket_bypass(this, fd, family); -} - -METHOD(kernel_ipsec_t, enable_udp_decap, bool, - private_kernel_netlink_ipsec_t *this, int fd, int family, u_int16_t port) -{ - int type = UDP_ENCAP_ESPINUDP; - - if (setsockopt(fd, SOL_UDP, UDP_ENCAP, &type, sizeof(type)) < 0) - { - DBG1(DBG_KNL, "unable to set UDP_ENCAP: %s", strerror(errno)); - return FALSE; - } - return TRUE; -} - -METHOD(kernel_ipsec_t, destroy, void, - private_kernel_netlink_ipsec_t *this) -{ - enumerator_t *enumerator; - policy_entry_t *policy; - - array_destroy_function(this->bypass, - (array_callback_t)remove_port_bypass, this); - if (this->socket_xfrm_events > 0) - { - lib->watcher->remove(lib->watcher, this->socket_xfrm_events); - close(this->socket_xfrm_events); - } - DESTROY_IF(this->socket_xfrm); - enumerator = this->policies->create_enumerator(this->policies); - while (enumerator->enumerate(enumerator, &policy, &policy)) - { - policy_entry_destroy(this, policy); - } - enumerator->destroy(enumerator); - this->policies->destroy(this->policies); - this->sas->destroy(this->sas); - this->mutex->destroy(this->mutex); - free(this); -} - -/* - * Described in header. - */ -kernel_netlink_ipsec_t *kernel_netlink_ipsec_create() -{ - private_kernel_netlink_ipsec_t *this; - bool register_for_events = TRUE; - FILE *f; - - INIT(this, - .public = { - .interface = { - .get_features = _get_features, - .get_spi = _get_spi, - .get_cpi = _get_cpi, - .add_sa = _add_sa, - .update_sa = _update_sa, - .query_sa = _query_sa, - .del_sa = _del_sa, - .flush_sas = _flush_sas, - .add_policy = _add_policy, - .query_policy = _query_policy, - .del_policy = _del_policy, - .flush_policies = _flush_policies, - .bypass_socket = _bypass_socket, - .enable_udp_decap = _enable_udp_decap, - .destroy = _destroy, - }, - }, - .policies = hashtable_create((hashtable_hash_t)policy_hash, - (hashtable_equals_t)policy_equals, 32), - .sas = hashtable_create((hashtable_hash_t)ipsec_sa_hash, - (hashtable_equals_t)ipsec_sa_equals, 32), - .bypass = array_create(sizeof(bypass_t), 0), - .mutex = mutex_create(MUTEX_TYPE_DEFAULT), - .policy_update = lib->settings->get_bool(lib->settings, - "%s.plugins.kernel-netlink.policy_update", FALSE, lib->ns), - .install_routes = lib->settings->get_bool(lib->settings, - "%s.install_routes", TRUE, lib->ns), - .proto_port_transport = lib->settings->get_bool(lib->settings, - "%s.plugins.kernel-netlink.set_proto_port_transport_sa", - FALSE, lib->ns), - ); - - if (streq(lib->ns, "starter")) - { /* starter has no threads, so we do not register for kernel events */ - register_for_events = FALSE; - } - - f = fopen("/proc/sys/net/core/xfrm_acq_expires", "w"); - if (f) - { - fprintf(f, "%u", lib->settings->get_int(lib->settings, - "%s.plugins.kernel-netlink.xfrm_acq_expires", - DEFAULT_ACQUIRE_LIFETIME, lib->ns)); - fclose(f); - } - - this->socket_xfrm = netlink_socket_create(NETLINK_XFRM, xfrm_msg_names, - lib->settings->get_bool(lib->settings, - "%s.plugins.kernel-netlink.parallel_xfrm", FALSE, lib->ns)); - if (!this->socket_xfrm) - { - destroy(this); - return NULL; - } - - if (register_for_events) - { - struct sockaddr_nl addr; - - memset(&addr, 0, sizeof(addr)); - addr.nl_family = AF_NETLINK; - - /* create and bind XFRM socket for ACQUIRE, EXPIRE, MIGRATE & MAPPING */ - this->socket_xfrm_events = socket(AF_NETLINK, SOCK_RAW, NETLINK_XFRM); - if (this->socket_xfrm_events <= 0) - { - DBG1(DBG_KNL, "unable to create XFRM event socket"); - destroy(this); - return NULL; - } - addr.nl_groups = XFRMNLGRP(ACQUIRE) | XFRMNLGRP(EXPIRE) | - XFRMNLGRP(MIGRATE) | XFRMNLGRP(MAPPING); - if (bind(this->socket_xfrm_events, (struct sockaddr*)&addr, sizeof(addr))) - { - DBG1(DBG_KNL, "unable to bind XFRM event socket"); - destroy(this); - return NULL; - } - lib->watcher->add(lib->watcher, this->socket_xfrm_events, WATCHER_READ, - (watcher_cb_t)receive_events, this); - } - - return &this->public; -} diff --git a/src/libhydra/plugins/kernel_netlink/kernel_netlink_ipsec.h b/src/libhydra/plugins/kernel_netlink/kernel_netlink_ipsec.h deleted file mode 100644 index 3a45cce06..000000000 --- a/src/libhydra/plugins/kernel_netlink/kernel_netlink_ipsec.h +++ /dev/null @@ -1,46 +0,0 @@ -/* - * Copyright (C) 2008 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -/** - * @defgroup kernel_netlink_ipsec_i kernel_netlink_ipsec - * @{ @ingroup kernel_netlink - */ - -#ifndef KERNEL_NETLINK_IPSEC_H_ -#define KERNEL_NETLINK_IPSEC_H_ - -#include <kernel/kernel_ipsec.h> - -typedef struct kernel_netlink_ipsec_t kernel_netlink_ipsec_t; - -/** - * Implementation of the kernel ipsec interface using Netlink. - */ -struct kernel_netlink_ipsec_t { - - /** - * Implements kernel_ipsec_t interface - */ - kernel_ipsec_t interface; -}; - -/** - * Create a netlink kernel ipsec interface instance. - * - * @return kernel_netlink_ipsec_t instance - */ -kernel_netlink_ipsec_t *kernel_netlink_ipsec_create(); - -#endif /** KERNEL_NETLINK_IPSEC_H_ @}*/ diff --git a/src/libhydra/plugins/kernel_netlink/kernel_netlink_net.c b/src/libhydra/plugins/kernel_netlink/kernel_netlink_net.c deleted file mode 100644 index 4e5e02d07..000000000 --- a/src/libhydra/plugins/kernel_netlink/kernel_netlink_net.c +++ /dev/null @@ -1,2685 +0,0 @@ -/* - * Copyright (C) 2008-2014 Tobias Brunner - * Copyright (C) 2005-2008 Martin Willi - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -/* - * Copyright (C) 2010 secunet Security Networks AG - * Copyright (C) 2010 Thomas Egerer - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#include <sys/socket.h> -#include <sys/utsname.h> -#include <linux/netlink.h> -#include <linux/rtnetlink.h> -#include <unistd.h> -#include <errno.h> -#include <net/if.h> -#ifdef HAVE_LINUX_FIB_RULES_H -#include <linux/fib_rules.h> -#endif - -#include "kernel_netlink_net.h" -#include "kernel_netlink_shared.h" - -#include <hydra.h> -#include <utils/debug.h> -#include <threading/mutex.h> -#include <threading/rwlock.h> -#include <threading/rwlock_condvar.h> -#include <threading/spinlock.h> -#include <collections/hashtable.h> -#include <collections/linked_list.h> -#include <processing/jobs/callback_job.h> - -/** delay before firing roam events (ms) */ -#define ROAM_DELAY 100 - -/** delay before reinstalling routes (ms) */ -#define ROUTE_DELAY 100 - -/** maximum recursion when searching for addresses in get_route() */ -#define MAX_ROUTE_RECURSION 2 - -#ifndef ROUTING_TABLE -#define ROUTING_TABLE 0 -#endif - -#ifndef ROUTING_TABLE_PRIO -#define ROUTING_TABLE_PRIO 0 -#endif - -ENUM(rt_msg_names, RTM_NEWLINK, RTM_GETRULE, - "RTM_NEWLINK", - "RTM_DELLINK", - "RTM_GETLINK", - "RTM_SETLINK", - "RTM_NEWADDR", - "RTM_DELADDR", - "RTM_GETADDR", - "31", - "RTM_NEWROUTE", - "RTM_DELROUTE", - "RTM_GETROUTE", - "35", - "RTM_NEWNEIGH", - "RTM_DELNEIGH", - "RTM_GETNEIGH", - "RTM_NEWRULE", - "RTM_DELRULE", - "RTM_GETRULE", -); - -typedef struct addr_entry_t addr_entry_t; - -/** - * IP address in an iface_entry_t - */ -struct addr_entry_t { - - /** the ip address */ - host_t *ip; - - /** address flags */ - u_char flags; - - /** scope of the address */ - u_char scope; - - /** number of times this IP is used, if virtual (i.e. managed by us) */ - u_int refcount; - - /** TRUE once it is installed, if virtual */ - bool installed; -}; - -/** - * destroy a addr_entry_t object - */ -static void addr_entry_destroy(addr_entry_t *this) -{ - this->ip->destroy(this->ip); - free(this); -} - -typedef struct iface_entry_t iface_entry_t; - -/** - * A network interface on this system, containing addr_entry_t's - */ -struct iface_entry_t { - - /** interface index */ - int ifindex; - - /** name of the interface */ - char ifname[IFNAMSIZ]; - - /** interface flags, as in netdevice(7) SIOCGIFFLAGS */ - u_int flags; - - /** list of addresses as host_t */ - linked_list_t *addrs; - - /** TRUE if usable by config */ - bool usable; -}; - -/** - * destroy an interface entry - */ -static void iface_entry_destroy(iface_entry_t *this) -{ - this->addrs->destroy_function(this->addrs, (void*)addr_entry_destroy); - free(this); -} - -/** - * find an interface entry by index - */ -static bool iface_entry_by_index(iface_entry_t *this, int *ifindex) -{ - return this->ifindex == *ifindex; -} - -/** - * find an interface entry by name - */ -static bool iface_entry_by_name(iface_entry_t *this, char *ifname) -{ - return streq(this->ifname, ifname); -} - -/** - * check if an interface is up - */ -static inline bool iface_entry_up(iface_entry_t *iface) -{ - return (iface->flags & IFF_UP) == IFF_UP; -} - -/** - * check if an interface is up and usable - */ -static inline bool iface_entry_up_and_usable(iface_entry_t *iface) -{ - return iface->usable && iface_entry_up(iface); -} - -typedef struct addr_map_entry_t addr_map_entry_t; - -/** - * Entry that maps an IP address to an interface entry - */ -struct addr_map_entry_t { - /** The IP address */ - host_t *ip; - - /** The address entry for this IP address */ - addr_entry_t *addr; - - /** The interface this address is installed on */ - iface_entry_t *iface; -}; - -/** - * Hash a addr_map_entry_t object, all entries with the same IP address - * are stored in the same bucket - */ -static u_int addr_map_entry_hash(addr_map_entry_t *this) -{ - return chunk_hash(this->ip->get_address(this->ip)); -} - -/** - * Compare two addr_map_entry_t objects, two entries are equal if they are - * installed on the same interface - */ -static bool addr_map_entry_equals(addr_map_entry_t *a, addr_map_entry_t *b) -{ - return a->iface->ifindex == b->iface->ifindex && - a->ip->ip_equals(a->ip, b->ip); -} - -/** - * Used with get_match this finds an address entry if it is installed on - * an up and usable interface - */ -static bool addr_map_entry_match_up_and_usable(addr_map_entry_t *a, - addr_map_entry_t *b) -{ - return iface_entry_up_and_usable(b->iface) && - a->ip->ip_equals(a->ip, b->ip); -} - -/** - * Used with get_match this finds an address entry if it is installed on - * any active local interface - */ -static bool addr_map_entry_match_up(addr_map_entry_t *a, addr_map_entry_t *b) -{ - return iface_entry_up(b->iface) && a->ip->ip_equals(a->ip, b->ip); -} - -/** - * Used with get_match this finds an address entry if it is installed on - * any local interface - */ -static bool addr_map_entry_match(addr_map_entry_t *a, addr_map_entry_t *b) -{ - return a->ip->ip_equals(a->ip, b->ip); -} - -typedef struct route_entry_t route_entry_t; - -/** - * Installed routing entry - */ -struct route_entry_t { - /** Name of the interface the route is bound to */ - char *if_name; - - /** Source ip of the route */ - host_t *src_ip; - - /** Gateway for this route */ - host_t *gateway; - - /** Destination net */ - chunk_t dst_net; - - /** Destination net prefixlen */ - u_int8_t prefixlen; -}; - -/** - * Clone a route_entry_t object. - */ -static route_entry_t *route_entry_clone(route_entry_t *this) -{ - route_entry_t *route; - - INIT(route, - .if_name = strdup(this->if_name), - .src_ip = this->src_ip->clone(this->src_ip), - .gateway = this->gateway ? this->gateway->clone(this->gateway) : NULL, - .dst_net = chunk_clone(this->dst_net), - .prefixlen = this->prefixlen, - ); - return route; -} - -/** - * Destroy a route_entry_t object - */ -static void route_entry_destroy(route_entry_t *this) -{ - free(this->if_name); - DESTROY_IF(this->src_ip); - DESTROY_IF(this->gateway); - chunk_free(&this->dst_net); - free(this); -} - -/** - * Hash a route_entry_t object - */ -static u_int route_entry_hash(route_entry_t *this) -{ - return chunk_hash_inc(chunk_from_thing(this->prefixlen), - chunk_hash(this->dst_net)); -} - -/** - * Compare two route_entry_t objects - */ -static bool route_entry_equals(route_entry_t *a, route_entry_t *b) -{ - if (a->if_name && b->if_name && streq(a->if_name, b->if_name) && - a->src_ip->ip_equals(a->src_ip, b->src_ip) && - chunk_equals(a->dst_net, b->dst_net) && a->prefixlen == b->prefixlen) - { - return (!a->gateway && !b->gateway) || (a->gateway && b->gateway && - a->gateway->ip_equals(a->gateway, b->gateway)); - } - return FALSE; -} - -typedef struct net_change_t net_change_t; - -/** - * Queued network changes - */ -struct net_change_t { - /** Name of the interface that got activated (or an IP appeared on) */ - char *if_name; -}; - -/** - * Destroy a net_change_t object - */ -static void net_change_destroy(net_change_t *this) -{ - free(this->if_name); - free(this); -} - -/** - * Hash a net_change_t object - */ -static u_int net_change_hash(net_change_t *this) -{ - return chunk_hash(chunk_create(this->if_name, strlen(this->if_name))); -} - -/** - * Compare two net_change_t objects - */ -static bool net_change_equals(net_change_t *a, net_change_t *b) -{ - return streq(a->if_name, b->if_name); -} - -typedef struct private_kernel_netlink_net_t private_kernel_netlink_net_t; - -/** - * Private variables and functions of kernel_netlink_net class. - */ -struct private_kernel_netlink_net_t { - /** - * Public part of the kernel_netlink_net_t object. - */ - kernel_netlink_net_t public; - - /** - * lock to access various lists and maps - */ - rwlock_t *lock; - - /** - * condition variable to signal virtual IP add/removal - */ - rwlock_condvar_t *condvar; - - /** - * Cached list of interfaces and its addresses (iface_entry_t) - */ - linked_list_t *ifaces; - - /** - * Map for IP addresses to iface_entry_t objects (addr_map_entry_t) - */ - hashtable_t *addrs; - - /** - * Map for virtual IP addresses to iface_entry_t objects (addr_map_entry_t) - */ - hashtable_t *vips; - - /** - * netlink rt socket (routing) - */ - netlink_socket_t *socket; - - /** - * Netlink rt socket to receive address change events - */ - int socket_events; - - /** - * earliest time of the next roam event - */ - timeval_t next_roam; - - /** - * roam event due to address change - */ - bool roam_address; - - /** - * lock to check and update roam event time - */ - spinlock_t *roam_lock; - - /** - * routing table to install routes - */ - int routing_table; - - /** - * priority of used routing table - */ - int routing_table_prio; - - /** - * installed routes - */ - hashtable_t *routes; - - /** - * mutex for routes - */ - mutex_t *routes_lock; - - /** - * interface changes which may trigger route reinstallation - */ - hashtable_t *net_changes; - - /** - * mutex for route reinstallation triggers - */ - mutex_t *net_changes_lock; - - /** - * time of last route reinstallation - */ - timeval_t last_route_reinstall; - - /** - * whether to react to RTM_NEWROUTE or RTM_DELROUTE events - */ - bool process_route; - - /** - * whether to trigger roam events - */ - bool roam_events; - - /** - * whether to actually install virtual IPs - */ - bool install_virtual_ip; - - /** - * the name of the interface virtual IP addresses are installed on - */ - char *install_virtual_ip_on; - - /** - * whether preferred source addresses can be specified for IPv6 routes - */ - bool rta_prefsrc_for_ipv6; - - /** - * whether marks can be used in route lookups - */ - bool rta_mark; - - /** - * the mark excluded from the routing rule used for virtual IPs - */ - mark_t routing_mark; - - /** - * whether to prefer temporary IPv6 addresses over public ones - */ - bool prefer_temporary_addrs; - - /** - * list with routing tables to be excluded from route lookup - */ - linked_list_t *rt_exclude; - - /** - * MTU to set on installed routes - */ - u_int32_t mtu; - - /** - * MSS to set on installed routes - */ - u_int32_t mss; -}; - -/** - * Forward declaration - */ -static status_t manage_srcroute(private_kernel_netlink_net_t *this, - int nlmsg_type, int flags, chunk_t dst_net, - u_int8_t prefixlen, host_t *gateway, - host_t *src_ip, char *if_name); - -/** - * Clear the queued network changes. - */ -static void net_changes_clear(private_kernel_netlink_net_t *this) -{ - enumerator_t *enumerator; - net_change_t *change; - - enumerator = this->net_changes->create_enumerator(this->net_changes); - while (enumerator->enumerate(enumerator, NULL, (void**)&change)) - { - this->net_changes->remove_at(this->net_changes, enumerator); - net_change_destroy(change); - } - enumerator->destroy(enumerator); -} - -/** - * Act upon queued network changes. - */ -static job_requeue_t reinstall_routes(private_kernel_netlink_net_t *this) -{ - enumerator_t *enumerator; - route_entry_t *route; - - this->net_changes_lock->lock(this->net_changes_lock); - this->routes_lock->lock(this->routes_lock); - - enumerator = this->routes->create_enumerator(this->routes); - while (enumerator->enumerate(enumerator, NULL, (void**)&route)) - { - net_change_t *change, lookup = { - .if_name = route->if_name, - }; - /* check if a change for the outgoing interface is queued */ - change = this->net_changes->get(this->net_changes, &lookup); - if (!change) - { /* in case src_ip is not on the outgoing interface */ - if (this->public.interface.get_interface(&this->public.interface, - route->src_ip, &lookup.if_name)) - { - if (!streq(lookup.if_name, route->if_name)) - { - change = this->net_changes->get(this->net_changes, &lookup); - } - free(lookup.if_name); - } - } - if (change) - { - manage_srcroute(this, RTM_NEWROUTE, NLM_F_CREATE | NLM_F_EXCL, - route->dst_net, route->prefixlen, route->gateway, - route->src_ip, route->if_name); - } - } - enumerator->destroy(enumerator); - this->routes_lock->unlock(this->routes_lock); - - net_changes_clear(this); - this->net_changes_lock->unlock(this->net_changes_lock); - return JOB_REQUEUE_NONE; -} - -/** - * Queue route reinstallation caused by network changes for a given interface. - * - * The route reinstallation is delayed for a while and only done once for - * several calls during this delay, in order to avoid doing it too often. - * The interface name is freed. - */ -static void queue_route_reinstall(private_kernel_netlink_net_t *this, - char *if_name) -{ - net_change_t *update, *found; - timeval_t now; - job_t *job; - - INIT(update, - .if_name = if_name - ); - - this->net_changes_lock->lock(this->net_changes_lock); - found = this->net_changes->put(this->net_changes, update, update); - if (found) - { - net_change_destroy(found); - } - time_monotonic(&now); - if (timercmp(&now, &this->last_route_reinstall, >)) - { - timeval_add_ms(&now, ROUTE_DELAY); - this->last_route_reinstall = now; - - job = (job_t*)callback_job_create((callback_job_cb_t)reinstall_routes, - this, NULL, NULL); - lib->scheduler->schedule_job_ms(lib->scheduler, job, ROUTE_DELAY); - } - this->net_changes_lock->unlock(this->net_changes_lock); -} - -/** - * check if the given IP is known as virtual IP and currently installed - * - * this function will also return TRUE if the virtual IP entry disappeared. - * in that case the returned entry will be NULL. - * - * this->lock must be held when calling this function - */ -static bool is_vip_installed_or_gone(private_kernel_netlink_net_t *this, - host_t *ip, addr_map_entry_t **entry) -{ - addr_map_entry_t lookup = { - .ip = ip, - }; - - *entry = this->vips->get_match(this->vips, &lookup, - (void*)addr_map_entry_match); - if (*entry == NULL) - { /* the virtual IP disappeared */ - return TRUE; - } - return (*entry)->addr->installed; -} - -/** - * check if the given IP is known as virtual IP - * - * this->lock must be held when calling this function - */ -static bool is_known_vip(private_kernel_netlink_net_t *this, host_t *ip) -{ - addr_map_entry_t lookup = { - .ip = ip, - }; - - return this->vips->get_match(this->vips, &lookup, - (void*)addr_map_entry_match) != NULL; -} - -/** - * Add an address map entry - */ -static void addr_map_entry_add(hashtable_t *map, addr_entry_t *addr, - iface_entry_t *iface) -{ - addr_map_entry_t *entry; - - INIT(entry, - .ip = addr->ip, - .addr = addr, - .iface = iface, - ); - entry = map->put(map, entry, entry); - free(entry); -} - -/** - * Remove an address map entry - */ -static void addr_map_entry_remove(hashtable_t *map, addr_entry_t *addr, - iface_entry_t *iface) -{ - addr_map_entry_t *entry, lookup = { - .ip = addr->ip, - .addr = addr, - .iface = iface, - }; - - entry = map->remove(map, &lookup); - free(entry); -} - -/** - * Determine the type or scope of the given unicast IP address. This is not - * the same thing returned in rtm_scope/ifa_scope. - * - * We use return values as defined in RFC 6724 (referring to RFC 4291). - */ -static u_char get_scope(host_t *ip) -{ - chunk_t addr; - - addr = ip->get_address(ip); - switch (addr.len) - { - case 4: - /* we use the mapping defined in RFC 6724, 3.2 */ - if (addr.ptr[0] == 127) - { /* link-local, same as the IPv6 loopback address */ - return 2; - } - if (addr.ptr[0] == 169 && addr.ptr[1] == 254) - { /* link-local */ - return 2; - } - break; - case 16: - if (IN6_IS_ADDR_LOOPBACK((struct in6_addr*)addr.ptr)) - { /* link-local, according to RFC 4291, 2.5.3 */ - return 2; - } - if (IN6_IS_ADDR_LINKLOCAL((struct in6_addr*)addr.ptr)) - { - return 2; - } - if (IN6_IS_ADDR_SITELOCAL((struct in6_addr*)addr.ptr)) - { /* deprecated, according to RFC 4291, 2.5.7 */ - return 5; - } - break; - default: - break; - } - /* global */ - return 14; -} - -/** - * Returns the length of the common prefix in bits up to the length of a's - * prefix, defined by RFC 6724 as the portion of the address not including the - * interface ID, which is 64-bit for most unicast addresses (see RFC 4291). - */ -static u_char common_prefix(host_t *a, host_t *b) -{ - chunk_t aa, ba; - u_char byte, bits = 0, match; - - aa = a->get_address(a); - ba = b->get_address(b); - for (byte = 0; byte < 8; byte++) - { - if (aa.ptr[byte] != ba.ptr[byte]) - { - match = aa.ptr[byte] ^ ba.ptr[byte]; - for (bits = 8; match; match >>= 1) - { - bits--; - } - break; - } - } - return byte * 8 + bits; -} - -/** - * Compare two IP addresses and return TRUE if the second address is the better - * choice of the two to reach the destination. - * For IPv6 we approximately follow RFC 6724. - */ -static bool is_address_better(private_kernel_netlink_net_t *this, - addr_entry_t *a, addr_entry_t *b, host_t *d) -{ - u_char sa, sb, sd, pa, pb; - - /* rule 2: prefer appropriate scope */ - if (d) - { - sa = get_scope(a->ip); - sb = get_scope(b->ip); - sd = get_scope(d); - if (sa < sb) - { - return sa < sd; - } - else if (sb < sa) - { - return sb >= sd; - } - } - if (a->ip->get_family(a->ip) == AF_INET) - { /* stop here for IPv4, default to addresses found earlier */ - return FALSE; - } - /* rule 3: avoid deprecated addresses (RFC 4862) */ - if ((a->flags & IFA_F_DEPRECATED) != (b->flags & IFA_F_DEPRECATED)) - { - return a->flags & IFA_F_DEPRECATED; - } - /* rule 4 is not applicable as we don't know if an address is a home or - * care-of addresses. - * rule 5 does not apply as we only compare addresses from one interface - * rule 6 requires a policy table (optionally configurable) to match - * configurable labels - */ - /* rule 7: prefer temporary addresses (WE REVERSE THIS BY DEFAULT!) */ - if ((a->flags & IFA_F_TEMPORARY) != (b->flags & IFA_F_TEMPORARY)) - { - if (this->prefer_temporary_addrs) - { - return b->flags & IFA_F_TEMPORARY; - } - return a->flags & IFA_F_TEMPORARY; - } - /* rule 8: use longest matching prefix */ - if (d) - { - pa = common_prefix(a->ip, d); - pb = common_prefix(b->ip, d); - if (pa != pb) - { - return pb > pa; - } - } - /* default to addresses found earlier */ - return FALSE; -} - -/** - * Get a non-virtual IP address on the given interface. - * - * If a candidate address is given, we first search for that address and if not - * found return the address as above. - * Returned host is a clone, has to be freed by caller. - * - * this->lock must be held when calling this function. - */ -static host_t *get_interface_address(private_kernel_netlink_net_t *this, - int ifindex, int family, host_t *dest, - host_t *candidate) -{ - iface_entry_t *iface; - enumerator_t *addrs; - addr_entry_t *addr, *best = NULL; - - if (this->ifaces->find_first(this->ifaces, (void*)iface_entry_by_index, - (void**)&iface, &ifindex) == SUCCESS) - { - if (iface->usable) - { /* only use interfaces not excluded by config */ - addrs = iface->addrs->create_enumerator(iface->addrs); - while (addrs->enumerate(addrs, &addr)) - { - if (addr->refcount || - addr->ip->get_family(addr->ip) != family) - { /* ignore virtual IP addresses and ensure family matches */ - continue; - } - if (candidate && candidate->ip_equals(candidate, addr->ip)) - { /* stop if we find the candidate */ - best = addr; - break; - } - else if (!best || is_address_better(this, best, addr, dest)) - { - best = addr; - } - } - addrs->destroy(addrs); - } - } - return best ? best->ip->clone(best->ip) : NULL; -} - -/** - * callback function that raises the delayed roam event - */ -static job_requeue_t roam_event(private_kernel_netlink_net_t *this) -{ - bool address; - - this->roam_lock->lock(this->roam_lock); - address = this->roam_address; - this->roam_address = FALSE; - this->roam_lock->unlock(this->roam_lock); - hydra->kernel_interface->roam(hydra->kernel_interface, address); - return JOB_REQUEUE_NONE; -} - -/** - * fire a roaming event. we delay it for a bit and fire only one event - * for multiple calls. otherwise we would create too many events. - */ -static void fire_roam_event(private_kernel_netlink_net_t *this, bool address) -{ - timeval_t now; - job_t *job; - - if (!this->roam_events) - { - return; - } - - time_monotonic(&now); - this->roam_lock->lock(this->roam_lock); - this->roam_address |= address; - if (!timercmp(&now, &this->next_roam, >)) - { - this->roam_lock->unlock(this->roam_lock); - return; - } - timeval_add_ms(&now, ROAM_DELAY); - this->next_roam = now; - this->roam_lock->unlock(this->roam_lock); - - job = (job_t*)callback_job_create((callback_job_cb_t)roam_event, - this, NULL, NULL); - lib->scheduler->schedule_job_ms(lib->scheduler, job, ROAM_DELAY); -} - -/** - * check if an interface with a given index is up and usable - * - * this->lock must be locked when calling this function - */ -static bool is_interface_up_and_usable(private_kernel_netlink_net_t *this, - int index) -{ - iface_entry_t *iface; - - if (this->ifaces->find_first(this->ifaces, (void*)iface_entry_by_index, - (void**)&iface, &index) == SUCCESS) - { - return iface_entry_up_and_usable(iface); - } - return FALSE; -} - -/** - * unregister the current addr_entry_t from the hashtable it is stored in - * - * this->lock must be locked when calling this function - */ -static void addr_entry_unregister(addr_entry_t *addr, iface_entry_t *iface, - private_kernel_netlink_net_t *this) -{ - if (addr->refcount) - { - addr_map_entry_remove(this->vips, addr, iface); - this->condvar->broadcast(this->condvar); - return; - } - addr_map_entry_remove(this->addrs, addr, iface); -} - -/** - * process RTM_NEWLINK/RTM_DELLINK from kernel - */ -static void process_link(private_kernel_netlink_net_t *this, - struct nlmsghdr *hdr, bool event) -{ - struct ifinfomsg* msg = NLMSG_DATA(hdr); - struct rtattr *rta = IFLA_RTA(msg); - size_t rtasize = IFLA_PAYLOAD (hdr); - enumerator_t *enumerator; - iface_entry_t *current, *entry = NULL; - char *name = NULL; - bool update = FALSE, update_routes = FALSE; - - while (RTA_OK(rta, rtasize)) - { - switch (rta->rta_type) - { - case IFLA_IFNAME: - name = RTA_DATA(rta); - break; - } - rta = RTA_NEXT(rta, rtasize); - } - if (!name) - { - name = "(unknown)"; - } - - this->lock->write_lock(this->lock); - switch (hdr->nlmsg_type) - { - case RTM_NEWLINK: - { - if (this->ifaces->find_first(this->ifaces, - (void*)iface_entry_by_index, (void**)&entry, - &msg->ifi_index) != SUCCESS) - { - INIT(entry, - .ifindex = msg->ifi_index, - .addrs = linked_list_create(), - .usable = hydra->kernel_interface->is_interface_usable( - hydra->kernel_interface, name), - ); - this->ifaces->insert_last(this->ifaces, entry); - } - strncpy(entry->ifname, name, IFNAMSIZ); - entry->ifname[IFNAMSIZ-1] = '\0'; - if (event && entry->usable) - { - if (!(entry->flags & IFF_UP) && (msg->ifi_flags & IFF_UP)) - { - update = update_routes = TRUE; - DBG1(DBG_KNL, "interface %s activated", name); - } - if ((entry->flags & IFF_UP) && !(msg->ifi_flags & IFF_UP)) - { - update = TRUE; - DBG1(DBG_KNL, "interface %s deactivated", name); - } - } - entry->flags = msg->ifi_flags; - break; - } - case RTM_DELLINK: - { - enumerator = this->ifaces->create_enumerator(this->ifaces); - while (enumerator->enumerate(enumerator, ¤t)) - { - if (current->ifindex == msg->ifi_index) - { - if (event && current->usable) - { - update = TRUE; - DBG1(DBG_KNL, "interface %s deleted", current->ifname); - } - /* TODO: move virtual IPs installed on this interface to - * another interface? */ - this->ifaces->remove_at(this->ifaces, enumerator); - current->addrs->invoke_function(current->addrs, - (void*)addr_entry_unregister, current, this); - iface_entry_destroy(current); - break; - } - } - enumerator->destroy(enumerator); - break; - } - } - this->lock->unlock(this->lock); - - if (update_routes && event) - { - queue_route_reinstall(this, strdup(name)); - } - - if (update && event) - { - fire_roam_event(this, TRUE); - } -} - -/** - * process RTM_NEWADDR/RTM_DELADDR from kernel - */ -static void process_addr(private_kernel_netlink_net_t *this, - struct nlmsghdr *hdr, bool event) -{ - struct ifaddrmsg* msg = NLMSG_DATA(hdr); - struct rtattr *rta = IFA_RTA(msg); - size_t rtasize = IFA_PAYLOAD (hdr); - host_t *host = NULL; - iface_entry_t *iface; - chunk_t local = chunk_empty, address = chunk_empty; - char *route_ifname = NULL; - bool update = FALSE, found = FALSE, changed = FALSE; - - while (RTA_OK(rta, rtasize)) - { - switch (rta->rta_type) - { - case IFA_LOCAL: - local.ptr = RTA_DATA(rta); - local.len = RTA_PAYLOAD(rta); - break; - case IFA_ADDRESS: - address.ptr = RTA_DATA(rta); - address.len = RTA_PAYLOAD(rta); - break; - } - rta = RTA_NEXT(rta, rtasize); - } - - /* For PPP interfaces, we need the IFA_LOCAL address, - * IFA_ADDRESS is the peers address. But IFA_LOCAL is - * not included in all cases (IPv6?), so fallback to IFA_ADDRESS. */ - if (local.ptr) - { - host = host_create_from_chunk(msg->ifa_family, local, 0); - } - else if (address.ptr) - { - host = host_create_from_chunk(msg->ifa_family, address, 0); - } - - if (host == NULL) - { /* bad family? */ - return; - } - - this->lock->write_lock(this->lock); - if (this->ifaces->find_first(this->ifaces, (void*)iface_entry_by_index, - (void**)&iface, &msg->ifa_index) == SUCCESS) - { - addr_map_entry_t *entry, lookup = { - .ip = host, - .iface = iface, - }; - addr_entry_t *addr; - - entry = this->vips->get(this->vips, &lookup); - if (entry) - { - if (hdr->nlmsg_type == RTM_NEWADDR) - { /* mark as installed and signal waiting threads */ - entry->addr->installed = TRUE; - } - else - { /* the address was already marked as uninstalled */ - addr = entry->addr; - iface->addrs->remove(iface->addrs, addr, NULL); - addr_map_entry_remove(this->vips, addr, iface); - addr_entry_destroy(addr); - } - /* no roam events etc. for virtual IPs */ - this->condvar->broadcast(this->condvar); - this->lock->unlock(this->lock); - host->destroy(host); - return; - } - entry = this->addrs->get(this->addrs, &lookup); - if (entry) - { - if (hdr->nlmsg_type == RTM_DELADDR) - { - found = TRUE; - addr = entry->addr; - iface->addrs->remove(iface->addrs, addr, NULL); - if (iface->usable) - { - changed = TRUE; - DBG1(DBG_KNL, "%H disappeared from %s", host, - iface->ifname); - } - addr_map_entry_remove(this->addrs, addr, iface); - addr_entry_destroy(addr); - } - } - else - { - if (hdr->nlmsg_type == RTM_NEWADDR) - { - found = TRUE; - changed = TRUE; - route_ifname = strdup(iface->ifname); - INIT(addr, - .ip = host->clone(host), - .flags = msg->ifa_flags, - .scope = msg->ifa_scope, - ); - iface->addrs->insert_last(iface->addrs, addr); - addr_map_entry_add(this->addrs, addr, iface); - if (event && iface->usable) - { - DBG1(DBG_KNL, "%H appeared on %s", host, iface->ifname); - } - } - } - if (found && (iface->flags & IFF_UP)) - { - update = TRUE; - } - if (!iface->usable) - { /* ignore events for interfaces excluded by config */ - update = changed = FALSE; - } - } - this->lock->unlock(this->lock); - - if (update && event && route_ifname) - { - queue_route_reinstall(this, route_ifname); - } - else - { - free(route_ifname); - } - host->destroy(host); - - /* send an update to all IKE_SAs */ - if (update && event && changed) - { - fire_roam_event(this, TRUE); - } -} - -/** - * process RTM_NEWROUTE and RTM_DELROUTE from kernel - */ -static void process_route(private_kernel_netlink_net_t *this, struct nlmsghdr *hdr) -{ - struct rtmsg* msg = NLMSG_DATA(hdr); - struct rtattr *rta = RTM_RTA(msg); - size_t rtasize = RTM_PAYLOAD(hdr); - u_int32_t rta_oif = 0; - host_t *host = NULL; - - /* ignore routes added by us or in the local routing table (local addrs) */ - if (msg->rtm_table && (msg->rtm_table == this->routing_table || - msg->rtm_table == RT_TABLE_LOCAL)) - { - return; - } - else if (msg->rtm_flags & RTM_F_CLONED) - { /* ignore cached routes, seem to be created a lot for IPv6 */ - return; - } - - while (RTA_OK(rta, rtasize)) - { - switch (rta->rta_type) - { - case RTA_PREFSRC: - DESTROY_IF(host); - host = host_create_from_chunk(msg->rtm_family, - chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta)), 0); - break; - case RTA_OIF: - if (RTA_PAYLOAD(rta) == sizeof(rta_oif)) - { - rta_oif = *(u_int32_t*)RTA_DATA(rta); - } - break; - } - rta = RTA_NEXT(rta, rtasize); - } - this->lock->read_lock(this->lock); - if (rta_oif && !is_interface_up_and_usable(this, rta_oif)) - { /* ignore route changes for interfaces that are ignored or down */ - this->lock->unlock(this->lock); - DESTROY_IF(host); - return; - } - if (!host && rta_oif) - { - host = get_interface_address(this, rta_oif, msg->rtm_family, - NULL, NULL); - } - if (!host || is_known_vip(this, host)) - { /* ignore routes added for virtual IPs */ - this->lock->unlock(this->lock); - DESTROY_IF(host); - return; - } - this->lock->unlock(this->lock); - fire_roam_event(this, FALSE); - host->destroy(host); -} - -/** - * Receives events from kernel - */ -static bool receive_events(private_kernel_netlink_net_t *this, int fd, - watcher_event_t event) -{ - char response[1536]; - struct nlmsghdr *hdr = (struct nlmsghdr*)response; - struct sockaddr_nl addr; - socklen_t addr_len = sizeof(addr); - int len; - - len = recvfrom(this->socket_events, response, sizeof(response), - MSG_DONTWAIT, (struct sockaddr*)&addr, &addr_len); - if (len < 0) - { - switch (errno) - { - case EINTR: - /* interrupted, try again */ - return TRUE; - case EAGAIN: - /* no data ready, select again */ - return TRUE; - default: - DBG1(DBG_KNL, "unable to receive from rt event socket"); - sleep(1); - return TRUE; - } - } - - if (addr.nl_pid != 0) - { /* not from kernel. not interested, try another one */ - return TRUE; - } - - while (NLMSG_OK(hdr, len)) - { - /* looks good so far, dispatch netlink message */ - switch (hdr->nlmsg_type) - { - case RTM_NEWADDR: - case RTM_DELADDR: - process_addr(this, hdr, TRUE); - break; - case RTM_NEWLINK: - case RTM_DELLINK: - process_link(this, hdr, TRUE); - break; - case RTM_NEWROUTE: - case RTM_DELROUTE: - if (this->process_route) - { - process_route(this, hdr); - } - break; - default: - break; - } - hdr = NLMSG_NEXT(hdr, len); - } - return TRUE; -} - -/** enumerator over addresses */ -typedef struct { - private_kernel_netlink_net_t* this; - /** which addresses to enumerate */ - kernel_address_type_t which; -} address_enumerator_t; - -/** - * cleanup function for address enumerator - */ -static void address_enumerator_destroy(address_enumerator_t *data) -{ - data->this->lock->unlock(data->this->lock); - free(data); -} - -/** - * filter for addresses - */ -static bool filter_addresses(address_enumerator_t *data, - addr_entry_t** in, host_t** out) -{ - if (!(data->which & ADDR_TYPE_VIRTUAL) && (*in)->refcount) - { /* skip virtual interfaces added by us */ - return FALSE; - } - if (!(data->which & ADDR_TYPE_REGULAR) && !(*in)->refcount) - { /* address is regular, but not requested */ - return FALSE; - } - if ((*in)->scope >= RT_SCOPE_LINK) - { /* skip addresses with a unusable scope */ - return FALSE; - } - *out = (*in)->ip; - return TRUE; -} - -/** - * enumerator constructor for interfaces - */ -static enumerator_t *create_iface_enumerator(iface_entry_t *iface, - address_enumerator_t *data) -{ - return enumerator_create_filter( - iface->addrs->create_enumerator(iface->addrs), - (void*)filter_addresses, data, NULL); -} - -/** - * filter for interfaces - */ -static bool filter_interfaces(address_enumerator_t *data, iface_entry_t** in, - iface_entry_t** out) -{ - if (!(data->which & ADDR_TYPE_IGNORED) && !(*in)->usable) - { /* skip interfaces excluded by config */ - return FALSE; - } - if (!(data->which & ADDR_TYPE_LOOPBACK) && ((*in)->flags & IFF_LOOPBACK)) - { /* ignore loopback devices */ - return FALSE; - } - if (!(data->which & ADDR_TYPE_DOWN) && !((*in)->flags & IFF_UP)) - { /* skip interfaces not up */ - return FALSE; - } - *out = *in; - return TRUE; -} - -METHOD(kernel_net_t, create_address_enumerator, enumerator_t*, - private_kernel_netlink_net_t *this, kernel_address_type_t which) -{ - address_enumerator_t *data; - - INIT(data, - .this = this, - .which = which, - ); - - this->lock->read_lock(this->lock); - return enumerator_create_nested( - enumerator_create_filter( - this->ifaces->create_enumerator(this->ifaces), - (void*)filter_interfaces, data, NULL), - (void*)create_iface_enumerator, data, - (void*)address_enumerator_destroy); -} - -METHOD(kernel_net_t, get_interface_name, bool, - private_kernel_netlink_net_t *this, host_t* ip, char **name) -{ - addr_map_entry_t *entry, lookup = { - .ip = ip, - }; - - if (ip->is_anyaddr(ip)) - { - return FALSE; - } - this->lock->read_lock(this->lock); - /* first try to find it on an up and usable interface */ - entry = this->addrs->get_match(this->addrs, &lookup, - (void*)addr_map_entry_match_up_and_usable); - if (entry) - { - if (name) - { - *name = strdup(entry->iface->ifname); - DBG2(DBG_KNL, "%H is on interface %s", ip, *name); - } - this->lock->unlock(this->lock); - return TRUE; - } - /* in a second step, consider virtual IPs installed by us */ - entry = this->vips->get_match(this->vips, &lookup, - (void*)addr_map_entry_match_up_and_usable); - if (entry) - { - if (name) - { - *name = strdup(entry->iface->ifname); - DBG2(DBG_KNL, "virtual IP %H is on interface %s", ip, *name); - } - this->lock->unlock(this->lock); - return TRUE; - } - /* maybe it is installed on an ignored interface */ - entry = this->addrs->get_match(this->addrs, &lookup, - (void*)addr_map_entry_match_up); - if (!entry) - { - DBG2(DBG_KNL, "%H is not a local address or the interface is down", ip); - } - this->lock->unlock(this->lock); - return FALSE; -} - -/** - * get the index of an interface by name - */ -static int get_interface_index(private_kernel_netlink_net_t *this, char* name) -{ - iface_entry_t *iface; - int ifindex = 0; - - DBG2(DBG_KNL, "getting iface index for %s", name); - - this->lock->read_lock(this->lock); - if (this->ifaces->find_first(this->ifaces, (void*)iface_entry_by_name, - (void**)&iface, name) == SUCCESS) - { - ifindex = iface->ifindex; - } - this->lock->unlock(this->lock); - - if (ifindex == 0) - { - DBG1(DBG_KNL, "unable to get interface index for %s", name); - } - return ifindex; -} - -/** - * check if an address or net (addr with prefix net bits) is in - * subnet (net with net_len net bits) - */ -static bool addr_in_subnet(chunk_t addr, int prefix, chunk_t net, int net_len) -{ - static const u_char mask[] = { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe }; - int byte = 0; - - if (net_len == 0) - { /* any address matches a /0 network */ - return TRUE; - } - if (addr.len != net.len || net_len > 8 * net.len || prefix < net_len) - { - return FALSE; - } - /* scan through all bytes in network order */ - while (net_len > 0) - { - if (net_len < 8) - { - return (mask[net_len] & addr.ptr[byte]) == (mask[net_len] & net.ptr[byte]); - } - else - { - if (addr.ptr[byte] != net.ptr[byte]) - { - return FALSE; - } - byte++; - net_len -= 8; - } - } - return TRUE; -} - -/** - * Store information about a route retrieved via RTNETLINK - */ -typedef struct { - chunk_t gtw; - chunk_t src; - chunk_t dst; - host_t *src_host; - u_int8_t dst_len; - u_int32_t table; - u_int32_t oif; - u_int32_t priority; -} rt_entry_t; - -/** - * Free a route entry - */ -static void rt_entry_destroy(rt_entry_t *this) -{ - DESTROY_IF(this->src_host); - free(this); -} - -/** - * Check if the route received with RTM_NEWROUTE is usable based on its type. - */ -static bool route_usable(struct nlmsghdr *hdr) -{ - struct rtmsg *msg; - - msg = NLMSG_DATA(hdr); - switch (msg->rtm_type) - { - case RTN_BLACKHOLE: - case RTN_UNREACHABLE: - case RTN_PROHIBIT: - case RTN_THROW: - return FALSE; - default: - return TRUE; - } -} - -/** - * Parse route received with RTM_NEWROUTE. The given rt_entry_t object will be - * reused if not NULL. - * - * Returned chunks point to internal data of the Netlink message. - */ -static rt_entry_t *parse_route(struct nlmsghdr *hdr, rt_entry_t *route) -{ - struct rtattr *rta; - struct rtmsg *msg; - size_t rtasize; - - msg = NLMSG_DATA(hdr); - rta = RTM_RTA(msg); - rtasize = RTM_PAYLOAD(hdr); - - if (route) - { - route->gtw = chunk_empty; - route->src = chunk_empty; - route->dst = chunk_empty; - route->dst_len = msg->rtm_dst_len; - route->table = msg->rtm_table; - route->oif = 0; - route->priority = 0; - } - else - { - INIT(route, - .dst_len = msg->rtm_dst_len, - .table = msg->rtm_table, - ); - } - - while (RTA_OK(rta, rtasize)) - { - switch (rta->rta_type) - { - case RTA_PREFSRC: - route->src = chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta)); - break; - case RTA_GATEWAY: - route->gtw = chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta)); - break; - case RTA_DST: - route->dst = chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta)); - break; - case RTA_OIF: - if (RTA_PAYLOAD(rta) == sizeof(route->oif)) - { - route->oif = *(u_int32_t*)RTA_DATA(rta); - } - break; - case RTA_PRIORITY: - if (RTA_PAYLOAD(rta) == sizeof(route->priority)) - { - route->priority = *(u_int32_t*)RTA_DATA(rta); - } - break; -#ifdef HAVE_RTA_TABLE - case RTA_TABLE: - if (RTA_PAYLOAD(rta) == sizeof(route->table)) - { - route->table = *(u_int32_t*)RTA_DATA(rta); - } - break; -#endif /* HAVE_RTA_TABLE*/ - } - rta = RTA_NEXT(rta, rtasize); - } - return route; -} - -/** - * Get a route: If "nexthop", the nexthop is returned. source addr otherwise. - */ -static host_t *get_route(private_kernel_netlink_net_t *this, host_t *dest, - int prefix, bool nexthop, host_t *candidate, - u_int recursion) -{ - netlink_buf_t request; - struct nlmsghdr *hdr, *out, *current; - struct rtmsg *msg; - chunk_t chunk; - size_t len; - linked_list_t *routes; - rt_entry_t *route = NULL, *best = NULL; - enumerator_t *enumerator; - host_t *addr = NULL; - bool match_net; - int family; - - if (recursion > MAX_ROUTE_RECURSION) - { - return NULL; - } - chunk = dest->get_address(dest); - len = chunk.len * 8; - prefix = prefix < 0 ? len : min(prefix, len); - match_net = prefix != len; - - memset(&request, 0, sizeof(request)); - - family = dest->get_family(dest); - hdr = &request.hdr; - hdr->nlmsg_flags = NLM_F_REQUEST; - hdr->nlmsg_type = RTM_GETROUTE; - hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); - - msg = NLMSG_DATA(hdr); - msg->rtm_family = family; - if (!match_net && this->rta_mark && this->routing_mark.value) - { - /* if our routing rule excludes packets with a certain mark we can - * get the preferred route without having to dump all routes */ - chunk = chunk_from_thing(this->routing_mark.value); - netlink_add_attribute(hdr, RTA_MARK, chunk, sizeof(request)); - } - else if (family == AF_INET || this->rta_prefsrc_for_ipv6 || - this->routing_table || match_net) - { /* kernels prior to 3.0 do not support RTA_PREFSRC for IPv6 routes. - * as we want to ignore routes with virtual IPs we cannot use DUMP - * if these routes are not installed in a separate table */ - hdr->nlmsg_flags |= NLM_F_DUMP; - } - if (candidate) - { - chunk = candidate->get_address(candidate); - netlink_add_attribute(hdr, RTA_PREFSRC, chunk, sizeof(request)); - } - if (!match_net) - { - chunk = dest->get_address(dest); - netlink_add_attribute(hdr, RTA_DST, chunk, sizeof(request)); - } - - if (this->socket->send(this->socket, hdr, &out, &len) != SUCCESS) - { - DBG2(DBG_KNL, "getting %s to reach %H/%d failed", - nexthop ? "nexthop" : "address", dest, prefix); - return NULL; - } - routes = linked_list_create(); - this->lock->read_lock(this->lock); - - for (current = out; NLMSG_OK(current, len); - current = NLMSG_NEXT(current, len)) - { - switch (current->nlmsg_type) - { - case NLMSG_DONE: - break; - case RTM_NEWROUTE: - { - rt_entry_t *other; - uintptr_t table; - - if (!route_usable(current)) - { - continue; - } - route = parse_route(current, route); - - table = (uintptr_t)route->table; - if (this->rt_exclude->find_first(this->rt_exclude, NULL, - (void**)&table) == SUCCESS) - { /* route is from an excluded routing table */ - continue; - } - if (this->routing_table != 0 && - route->table == this->routing_table) - { /* route is from our own ipsec routing table */ - continue; - } - if (route->oif && !is_interface_up_and_usable(this, route->oif)) - { /* interface is down */ - continue; - } - if (!addr_in_subnet(chunk, prefix, route->dst, route->dst_len)) - { /* route destination does not contain dest */ - continue; - } - if (route->src.ptr) - { /* verify source address, if any */ - host_t *src = host_create_from_chunk(msg->rtm_family, - route->src, 0); - if (src && is_known_vip(this, src)) - { /* ignore routes installed by us */ - src->destroy(src); - continue; - } - route->src_host = src; - } - /* insert route, sorted by priority and network prefix */ - enumerator = routes->create_enumerator(routes); - while (enumerator->enumerate(enumerator, &other)) - { - if (route->priority < other->priority) - { - break; - } - if (route->priority == other->priority && - route->dst_len > other->dst_len) - { - break; - } - } - routes->insert_before(routes, enumerator, route); - enumerator->destroy(enumerator); - route = NULL; - continue; - } - default: - continue; - } - break; - } - if (route) - { - rt_entry_destroy(route); - } - - /* now we have a list of routes matching dest, sorted by net prefix. - * we will look for source addresses for these routes and select the one - * with the preferred source address, if possible */ - enumerator = routes->create_enumerator(routes); - while (enumerator->enumerate(enumerator, &route)) - { - if (route->src_host) - { /* got a source address with the route, if no preferred source - * is given or it matches we are done, as this is the best route */ - if (!candidate || candidate->ip_equals(candidate, route->src_host)) - { - best = route; - break; - } - else if (route->oif) - { /* no match yet, maybe it is assigned to the same interface */ - host_t *src = get_interface_address(this, route->oif, - msg->rtm_family, dest, candidate); - if (src && src->ip_equals(src, candidate)) - { - route->src_host->destroy(route->src_host); - route->src_host = src; - best = route; - break; - } - DESTROY_IF(src); - } - /* no luck yet with the source address. if this is the best (first) - * route we store it as fallback in case we don't find a route with - * the preferred source */ - best = best ?: route; - continue; - } - if (route->oif) - { /* no src, but an interface - get address from it */ - route->src_host = get_interface_address(this, route->oif, - msg->rtm_family, dest, candidate); - if (route->src_host) - { /* we handle this address the same as the one above */ - if (!candidate || - candidate->ip_equals(candidate, route->src_host)) - { - best = route; - break; - } - best = best ?: route; - continue; - } - } - if (route->gtw.ptr) - { /* no src, no iface, but a gateway - lookup src to reach gtw */ - host_t *gtw; - - gtw = host_create_from_chunk(msg->rtm_family, route->gtw, 0); - if (gtw && !gtw->ip_equals(gtw, dest)) - { - route->src_host = get_route(this, gtw, -1, FALSE, candidate, - recursion + 1); - } - DESTROY_IF(gtw); - if (route->src_host) - { /* more of the same */ - if (!candidate || - candidate->ip_equals(candidate, route->src_host)) - { - best = route; - break; - } - best = best ?: route; - } - } - } - enumerator->destroy(enumerator); - - if (nexthop) - { /* nexthop lookup, return gateway if any */ - if (best || routes->get_first(routes, (void**)&best) == SUCCESS) - { - addr = host_create_from_chunk(msg->rtm_family, best->gtw, 0); - } - if (!addr && !match_net) - { /* fallback to destination address */ - addr = dest->clone(dest); - } - } - else - { - if (best) - { - addr = best->src_host->clone(best->src_host); - } - } - this->lock->unlock(this->lock); - routes->destroy_function(routes, (void*)rt_entry_destroy); - free(out); - - if (addr) - { - DBG2(DBG_KNL, "using %H as %s to reach %H/%d", addr, - nexthop ? "nexthop" : "address", dest, prefix); - } - else if (!recursion) - { - DBG2(DBG_KNL, "no %s found to reach %H/%d", - nexthop ? "nexthop" : "address", dest, prefix); - } - return addr; -} - -METHOD(kernel_net_t, get_source_addr, host_t*, - private_kernel_netlink_net_t *this, host_t *dest, host_t *src) -{ - return get_route(this, dest, -1, FALSE, src, 0); -} - -METHOD(kernel_net_t, get_nexthop, host_t*, - private_kernel_netlink_net_t *this, host_t *dest, int prefix, host_t *src) -{ - return get_route(this, dest, prefix, TRUE, src, 0); -} - -/** - * Manages the creation and deletion of ip addresses on an interface. - * By setting the appropriate nlmsg_type, the ip will be set or unset. - */ -static status_t manage_ipaddr(private_kernel_netlink_net_t *this, int nlmsg_type, - int flags, int if_index, host_t *ip, int prefix) -{ - netlink_buf_t request; - struct nlmsghdr *hdr; - struct ifaddrmsg *msg; - chunk_t chunk; - - memset(&request, 0, sizeof(request)); - - chunk = ip->get_address(ip); - - hdr = &request.hdr; - hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags; - hdr->nlmsg_type = nlmsg_type; - hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg)); - - msg = NLMSG_DATA(hdr); - msg->ifa_family = ip->get_family(ip); - msg->ifa_flags = 0; - msg->ifa_prefixlen = prefix < 0 ? chunk.len * 8 : prefix; - msg->ifa_scope = RT_SCOPE_UNIVERSE; - msg->ifa_index = if_index; - - netlink_add_attribute(hdr, IFA_LOCAL, chunk, sizeof(request)); - - if (ip->get_family(ip) == AF_INET6 && this->rta_prefsrc_for_ipv6) - { /* if source routes are possible we let the virtual IP get deprecated - * immediately (but mark it as valid forever) so it gets only used if - * forced by our route, and not by the default IPv6 address selection */ - struct ifa_cacheinfo cache = { - .ifa_valid = 0xFFFFFFFF, - .ifa_prefered = 0, - }; - netlink_add_attribute(hdr, IFA_CACHEINFO, chunk_from_thing(cache), - sizeof(request)); - } - return this->socket->send_ack(this->socket, hdr); -} - -METHOD(kernel_net_t, add_ip, status_t, - private_kernel_netlink_net_t *this, host_t *virtual_ip, int prefix, - char *iface_name) -{ - addr_map_entry_t *entry, lookup = { - .ip = virtual_ip, - }; - iface_entry_t *iface = NULL; - - if (!this->install_virtual_ip) - { /* disabled by config */ - return SUCCESS; - } - - this->lock->write_lock(this->lock); - /* the virtual IP might actually be installed as regular IP, in which case - * we don't track it as virtual IP */ - entry = this->addrs->get_match(this->addrs, &lookup, - (void*)addr_map_entry_match); - if (!entry) - { /* otherwise it might already be installed as virtual IP */ - entry = this->vips->get_match(this->vips, &lookup, - (void*)addr_map_entry_match); - if (entry) - { /* the vip we found can be in one of three states: 1) installed and - * ready, 2) just added by another thread, but not yet confirmed to - * be installed by the kernel, 3) just deleted, but not yet gone. - * Then while we wait below, several things could happen (as we - * release the lock). For instance, the interface could disappear, - * or the IP is finally deleted, and it reappears on a different - * interface. All these cases are handled by the call below. */ - while (!is_vip_installed_or_gone(this, virtual_ip, &entry)) - { - this->condvar->wait(this->condvar, this->lock); - } - if (entry) - { - entry->addr->refcount++; - } - } - } - if (entry) - { - DBG2(DBG_KNL, "virtual IP %H is already installed on %s", virtual_ip, - entry->iface->ifname); - this->lock->unlock(this->lock); - return SUCCESS; - } - /* try to find the target interface, either by config or via src ip */ - if (!this->install_virtual_ip_on || - this->ifaces->find_first(this->ifaces, (void*)iface_entry_by_name, - (void**)&iface, this->install_virtual_ip_on) != SUCCESS) - { - if (this->ifaces->find_first(this->ifaces, (void*)iface_entry_by_name, - (void**)&iface, iface_name) != SUCCESS) - { /* if we don't find the requested interface we just use the first */ - this->ifaces->get_first(this->ifaces, (void**)&iface); - } - } - if (iface) - { - addr_entry_t *addr; - char *ifname; - int ifi; - - INIT(addr, - .ip = virtual_ip->clone(virtual_ip), - .refcount = 1, - .scope = RT_SCOPE_UNIVERSE, - ); - iface->addrs->insert_last(iface->addrs, addr); - addr_map_entry_add(this->vips, addr, iface); - ifi = iface->ifindex; - this->lock->unlock(this->lock); - if (manage_ipaddr(this, RTM_NEWADDR, NLM_F_CREATE | NLM_F_EXCL, - ifi, virtual_ip, prefix) == SUCCESS) - { - this->lock->write_lock(this->lock); - while (!is_vip_installed_or_gone(this, virtual_ip, &entry)) - { /* wait until address appears */ - this->condvar->wait(this->condvar, this->lock); - } - if (entry) - { /* we fail if the interface got deleted in the meantime */ - ifname = strdup(entry->iface->ifname); - this->lock->unlock(this->lock); - DBG2(DBG_KNL, "virtual IP %H installed on %s", - virtual_ip, ifname); - /* during IKEv1 reauthentication, children get moved from - * old the new SA before the virtual IP is available. This - * kills the route for our virtual IP, reinstall. */ - queue_route_reinstall(this, ifname); - return SUCCESS; - } - this->lock->unlock(this->lock); - } - DBG1(DBG_KNL, "adding virtual IP %H failed", virtual_ip); - return FAILED; - } - this->lock->unlock(this->lock); - DBG1(DBG_KNL, "no interface available, unable to install virtual IP %H", - virtual_ip); - return FAILED; -} - -METHOD(kernel_net_t, del_ip, status_t, - private_kernel_netlink_net_t *this, host_t *virtual_ip, int prefix, - bool wait) -{ - addr_map_entry_t *entry, lookup = { - .ip = virtual_ip, - }; - - if (!this->install_virtual_ip) - { /* disabled by config */ - return SUCCESS; - } - - DBG2(DBG_KNL, "deleting virtual IP %H", virtual_ip); - - this->lock->write_lock(this->lock); - entry = this->vips->get_match(this->vips, &lookup, - (void*)addr_map_entry_match); - if (!entry) - { /* we didn't install this IP as virtual IP */ - entry = this->addrs->get_match(this->addrs, &lookup, - (void*)addr_map_entry_match); - if (entry) - { - DBG2(DBG_KNL, "not deleting existing IP %H on %s", virtual_ip, - entry->iface->ifname); - this->lock->unlock(this->lock); - return SUCCESS; - } - DBG2(DBG_KNL, "virtual IP %H not cached, unable to delete", virtual_ip); - this->lock->unlock(this->lock); - return FAILED; - } - if (entry->addr->refcount == 1) - { - status_t status; - int ifi; - - /* we set this flag so that threads calling add_ip will block and wait - * until the entry is gone, also so we can wait below */ - entry->addr->installed = FALSE; - ifi = entry->iface->ifindex; - this->lock->unlock(this->lock); - status = manage_ipaddr(this, RTM_DELADDR, 0, ifi, virtual_ip, prefix); - if (status == SUCCESS && wait) - { /* wait until the address is really gone */ - this->lock->write_lock(this->lock); - while (is_known_vip(this, virtual_ip)) - { - this->condvar->wait(this->condvar, this->lock); - } - this->lock->unlock(this->lock); - } - return status; - } - else - { - entry->addr->refcount--; - } - DBG2(DBG_KNL, "virtual IP %H used by other SAs, not deleting", - virtual_ip); - this->lock->unlock(this->lock); - return SUCCESS; -} - -/** - * Manages source routes in the routing table. - * By setting the appropriate nlmsg_type, the route gets added or removed. - */ -static status_t manage_srcroute(private_kernel_netlink_net_t *this, - int nlmsg_type, int flags, chunk_t dst_net, - u_int8_t prefixlen, host_t *gateway, - host_t *src_ip, char *if_name) -{ - netlink_buf_t request; - struct nlmsghdr *hdr; - struct rtmsg *msg; - struct rtattr *rta; - int ifindex; - chunk_t chunk; - - /* if route is 0.0.0.0/0, we can't install it, as it would - * overwrite the default route. Instead, we add two routes: - * 0.0.0.0/1 and 128.0.0.0/1 */ - if (this->routing_table == 0 && prefixlen == 0) - { - chunk_t half_net; - u_int8_t half_prefixlen; - status_t status; - - half_net = chunk_alloca(dst_net.len); - memset(half_net.ptr, 0, half_net.len); - half_prefixlen = 1; - - status = manage_srcroute(this, nlmsg_type, flags, half_net, half_prefixlen, - gateway, src_ip, if_name); - half_net.ptr[0] |= 0x80; - status = manage_srcroute(this, nlmsg_type, flags, half_net, half_prefixlen, - gateway, src_ip, if_name); - return status; - } - - memset(&request, 0, sizeof(request)); - - hdr = &request.hdr; - hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags; - hdr->nlmsg_type = nlmsg_type; - hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); - - msg = NLMSG_DATA(hdr); - msg->rtm_family = src_ip->get_family(src_ip); - msg->rtm_dst_len = prefixlen; - msg->rtm_table = this->routing_table; - msg->rtm_protocol = RTPROT_STATIC; - msg->rtm_type = RTN_UNICAST; - msg->rtm_scope = RT_SCOPE_UNIVERSE; - - netlink_add_attribute(hdr, RTA_DST, dst_net, sizeof(request)); - chunk = src_ip->get_address(src_ip); - netlink_add_attribute(hdr, RTA_PREFSRC, chunk, sizeof(request)); - if (gateway && gateway->get_family(gateway) == src_ip->get_family(src_ip)) - { - chunk = gateway->get_address(gateway); - netlink_add_attribute(hdr, RTA_GATEWAY, chunk, sizeof(request)); - } - ifindex = get_interface_index(this, if_name); - chunk.ptr = (char*)&ifindex; - chunk.len = sizeof(ifindex); - netlink_add_attribute(hdr, RTA_OIF, chunk, sizeof(request)); - - if (this->mtu || this->mss) - { - chunk = chunk_alloca(RTA_LENGTH((sizeof(struct rtattr) + - sizeof(u_int32_t)) * 2)); - chunk.len = 0; - rta = (struct rtattr*)chunk.ptr; - if (this->mtu) - { - rta->rta_type = RTAX_MTU; - rta->rta_len = RTA_LENGTH(sizeof(u_int32_t)); - memcpy(RTA_DATA(rta), &this->mtu, sizeof(u_int32_t)); - chunk.len = rta->rta_len; - } - if (this->mss) - { - rta = (struct rtattr*)(chunk.ptr + RTA_ALIGN(chunk.len)); - rta->rta_type = RTAX_ADVMSS; - rta->rta_len = RTA_LENGTH(sizeof(u_int32_t)); - memcpy(RTA_DATA(rta), &this->mss, sizeof(u_int32_t)); - chunk.len = RTA_ALIGN(chunk.len) + rta->rta_len; - } - netlink_add_attribute(hdr, RTA_METRICS, chunk, sizeof(request)); - } - - return this->socket->send_ack(this->socket, hdr); -} - -METHOD(kernel_net_t, add_route, status_t, - private_kernel_netlink_net_t *this, chunk_t dst_net, u_int8_t prefixlen, - host_t *gateway, host_t *src_ip, char *if_name) -{ - status_t status; - route_entry_t *found, route = { - .dst_net = dst_net, - .prefixlen = prefixlen, - .gateway = gateway, - .src_ip = src_ip, - .if_name = if_name, - }; - - this->routes_lock->lock(this->routes_lock); - found = this->routes->get(this->routes, &route); - if (found) - { - this->routes_lock->unlock(this->routes_lock); - return ALREADY_DONE; - } - status = manage_srcroute(this, RTM_NEWROUTE, NLM_F_CREATE | NLM_F_EXCL, - dst_net, prefixlen, gateway, src_ip, if_name); - if (status == SUCCESS) - { - found = route_entry_clone(&route); - this->routes->put(this->routes, found, found); - } - this->routes_lock->unlock(this->routes_lock); - return status; -} - -METHOD(kernel_net_t, del_route, status_t, - private_kernel_netlink_net_t *this, chunk_t dst_net, u_int8_t prefixlen, - host_t *gateway, host_t *src_ip, char *if_name) -{ - status_t status; - route_entry_t *found, route = { - .dst_net = dst_net, - .prefixlen = prefixlen, - .gateway = gateway, - .src_ip = src_ip, - .if_name = if_name, - }; - - this->routes_lock->lock(this->routes_lock); - found = this->routes->get(this->routes, &route); - if (!found) - { - this->routes_lock->unlock(this->routes_lock); - return NOT_FOUND; - } - this->routes->remove(this->routes, found); - route_entry_destroy(found); - status = manage_srcroute(this, RTM_DELROUTE, 0, dst_net, prefixlen, - gateway, src_ip, if_name); - this->routes_lock->unlock(this->routes_lock); - return status; -} - -/** - * Initialize a list of local addresses. - */ -static status_t init_address_list(private_kernel_netlink_net_t *this) -{ - netlink_buf_t request; - struct nlmsghdr *out, *current, *in; - struct rtgenmsg *msg; - size_t len; - enumerator_t *ifaces, *addrs; - iface_entry_t *iface; - addr_entry_t *addr; - - DBG2(DBG_KNL, "known interfaces and IP addresses:"); - - memset(&request, 0, sizeof(request)); - - in = &request.hdr; - in->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg)); - in->nlmsg_flags = NLM_F_REQUEST | NLM_F_MATCH | NLM_F_ROOT; - msg = NLMSG_DATA(in); - msg->rtgen_family = AF_UNSPEC; - - /* get all links */ - in->nlmsg_type = RTM_GETLINK; - if (this->socket->send(this->socket, in, &out, &len) != SUCCESS) - { - return FAILED; - } - current = out; - while (NLMSG_OK(current, len)) - { - switch (current->nlmsg_type) - { - case NLMSG_DONE: - break; - case RTM_NEWLINK: - process_link(this, current, FALSE); - /* fall through */ - default: - current = NLMSG_NEXT(current, len); - continue; - } - break; - } - free(out); - - /* get all interface addresses */ - in->nlmsg_type = RTM_GETADDR; - if (this->socket->send(this->socket, in, &out, &len) != SUCCESS) - { - return FAILED; - } - current = out; - while (NLMSG_OK(current, len)) - { - switch (current->nlmsg_type) - { - case NLMSG_DONE: - break; - case RTM_NEWADDR: - process_addr(this, current, FALSE); - /* fall through */ - default: - current = NLMSG_NEXT(current, len); - continue; - } - break; - } - free(out); - - this->lock->read_lock(this->lock); - ifaces = this->ifaces->create_enumerator(this->ifaces); - while (ifaces->enumerate(ifaces, &iface)) - { - if (iface_entry_up_and_usable(iface)) - { - DBG2(DBG_KNL, " %s", iface->ifname); - addrs = iface->addrs->create_enumerator(iface->addrs); - while (addrs->enumerate(addrs, (void**)&addr)) - { - DBG2(DBG_KNL, " %H", addr->ip); - } - addrs->destroy(addrs); - } - } - ifaces->destroy(ifaces); - this->lock->unlock(this->lock); - return SUCCESS; -} - -/** - * create or delete a rule to use our routing table - */ -static status_t manage_rule(private_kernel_netlink_net_t *this, int nlmsg_type, - int family, u_int32_t table, u_int32_t prio) -{ - netlink_buf_t request; - struct nlmsghdr *hdr; - struct rtmsg *msg; - chunk_t chunk; - char *fwmark; - - memset(&request, 0, sizeof(request)); - hdr = &request.hdr; - hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; - hdr->nlmsg_type = nlmsg_type; - if (nlmsg_type == RTM_NEWRULE) - { - hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL; - } - hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); - - msg = NLMSG_DATA(hdr); - msg->rtm_table = table; - msg->rtm_family = family; - msg->rtm_protocol = RTPROT_BOOT; - msg->rtm_scope = RT_SCOPE_UNIVERSE; - msg->rtm_type = RTN_UNICAST; - - chunk = chunk_from_thing(prio); - netlink_add_attribute(hdr, RTA_PRIORITY, chunk, sizeof(request)); - - fwmark = lib->settings->get_str(lib->settings, - "%s.plugins.kernel-netlink.fwmark", NULL, lib->ns); - if (fwmark) - { -#ifdef HAVE_LINUX_FIB_RULES_H - mark_t mark; - - if (fwmark[0] == '!') - { - msg->rtm_flags |= FIB_RULE_INVERT; - fwmark++; - } - if (mark_from_string(fwmark, &mark)) - { - chunk = chunk_from_thing(mark.value); - netlink_add_attribute(hdr, FRA_FWMARK, chunk, sizeof(request)); - chunk = chunk_from_thing(mark.mask); - netlink_add_attribute(hdr, FRA_FWMASK, chunk, sizeof(request)); - if (msg->rtm_flags & FIB_RULE_INVERT) - { - this->routing_mark = mark; - } - } -#else - DBG1(DBG_KNL, "setting firewall mark on routing rule is not supported"); -#endif - } - return this->socket->send_ack(this->socket, hdr); -} - -/** - * check for kernel features (currently only via version number) - */ -static void check_kernel_features(private_kernel_netlink_net_t *this) -{ - struct utsname utsname; - int a, b, c; - - if (uname(&utsname) == 0) - { - switch(sscanf(utsname.release, "%d.%d.%d", &a, &b, &c)) - { - case 3: - if (a == 2) - { - if (b == 6 && c >= 36) - { - this->rta_mark = TRUE; - } - DBG2(DBG_KNL, "detected Linux %d.%d.%d, no support for " - "RTA_PREFSRC for IPv6 routes", a, b, c); - break; - } - /* fall-through */ - case 2: - /* only 3.x+ uses two part version numbers */ - this->rta_prefsrc_for_ipv6 = TRUE; - this->rta_mark = TRUE; - break; - default: - break; - } - } -} - -/** - * Destroy an address to iface map - */ -static void addr_map_destroy(hashtable_t *map) -{ - enumerator_t *enumerator; - addr_map_entry_t *addr; - - enumerator = map->create_enumerator(map); - while (enumerator->enumerate(enumerator, NULL, (void**)&addr)) - { - free(addr); - } - enumerator->destroy(enumerator); - map->destroy(map); -} - -METHOD(kernel_net_t, destroy, void, - private_kernel_netlink_net_t *this) -{ - enumerator_t *enumerator; - route_entry_t *route; - - if (this->routing_table) - { - manage_rule(this, RTM_DELRULE, AF_INET, this->routing_table, - this->routing_table_prio); - manage_rule(this, RTM_DELRULE, AF_INET6, this->routing_table, - this->routing_table_prio); - } - if (this->socket_events > 0) - { - lib->watcher->remove(lib->watcher, this->socket_events); - close(this->socket_events); - } - enumerator = this->routes->create_enumerator(this->routes); - while (enumerator->enumerate(enumerator, NULL, (void**)&route)) - { - manage_srcroute(this, RTM_DELROUTE, 0, route->dst_net, route->prefixlen, - route->gateway, route->src_ip, route->if_name); - route_entry_destroy(route); - } - enumerator->destroy(enumerator); - this->routes->destroy(this->routes); - this->routes_lock->destroy(this->routes_lock); - DESTROY_IF(this->socket); - - net_changes_clear(this); - this->net_changes->destroy(this->net_changes); - this->net_changes_lock->destroy(this->net_changes_lock); - - addr_map_destroy(this->addrs); - addr_map_destroy(this->vips); - - this->ifaces->destroy_function(this->ifaces, (void*)iface_entry_destroy); - this->rt_exclude->destroy(this->rt_exclude); - this->roam_lock->destroy(this->roam_lock); - this->condvar->destroy(this->condvar); - this->lock->destroy(this->lock); - free(this); -} - -/* - * Described in header. - */ -kernel_netlink_net_t *kernel_netlink_net_create() -{ - private_kernel_netlink_net_t *this; - enumerator_t *enumerator; - bool register_for_events = TRUE; - char *exclude; - - INIT(this, - .public = { - .interface = { - .get_interface = _get_interface_name, - .create_address_enumerator = _create_address_enumerator, - .get_source_addr = _get_source_addr, - .get_nexthop = _get_nexthop, - .add_ip = _add_ip, - .del_ip = _del_ip, - .add_route = _add_route, - .del_route = _del_route, - .destroy = _destroy, - }, - }, - .socket = netlink_socket_create(NETLINK_ROUTE, rt_msg_names, - lib->settings->get_bool(lib->settings, - "%s.plugins.kernel-netlink.parallel_route", FALSE, lib->ns)), - .rt_exclude = linked_list_create(), - .routes = hashtable_create((hashtable_hash_t)route_entry_hash, - (hashtable_equals_t)route_entry_equals, 16), - .net_changes = hashtable_create( - (hashtable_hash_t)net_change_hash, - (hashtable_equals_t)net_change_equals, 16), - .addrs = hashtable_create( - (hashtable_hash_t)addr_map_entry_hash, - (hashtable_equals_t)addr_map_entry_equals, 16), - .vips = hashtable_create((hashtable_hash_t)addr_map_entry_hash, - (hashtable_equals_t)addr_map_entry_equals, 16), - .routes_lock = mutex_create(MUTEX_TYPE_DEFAULT), - .net_changes_lock = mutex_create(MUTEX_TYPE_DEFAULT), - .ifaces = linked_list_create(), - .lock = rwlock_create(RWLOCK_TYPE_DEFAULT), - .condvar = rwlock_condvar_create(), - .roam_lock = spinlock_create(), - .routing_table = lib->settings->get_int(lib->settings, - "%s.routing_table", ROUTING_TABLE, lib->ns), - .routing_table_prio = lib->settings->get_int(lib->settings, - "%s.routing_table_prio", ROUTING_TABLE_PRIO, lib->ns), - .process_route = lib->settings->get_bool(lib->settings, - "%s.process_route", TRUE, lib->ns), - .install_virtual_ip = lib->settings->get_bool(lib->settings, - "%s.install_virtual_ip", TRUE, lib->ns), - .install_virtual_ip_on = lib->settings->get_str(lib->settings, - "%s.install_virtual_ip_on", NULL, lib->ns), - .prefer_temporary_addrs = lib->settings->get_bool(lib->settings, - "%s.prefer_temporary_addrs", FALSE, lib->ns), - .roam_events = lib->settings->get_bool(lib->settings, - "%s.plugins.kernel-netlink.roam_events", TRUE, lib->ns), - .mtu = lib->settings->get_int(lib->settings, - "%s.plugins.kernel-netlink.mtu", 0, lib->ns), - .mss = lib->settings->get_int(lib->settings, - "%s.plugins.kernel-netlink.mss", 0, lib->ns), - ); - timerclear(&this->last_route_reinstall); - timerclear(&this->next_roam); - - check_kernel_features(this); - - if (streq(lib->ns, "starter")) - { /* starter has no threads, so we do not register for kernel events */ - register_for_events = FALSE; - } - - exclude = lib->settings->get_str(lib->settings, - "%s.ignore_routing_tables", NULL, lib->ns); - if (exclude) - { - char *token; - uintptr_t table; - - enumerator = enumerator_create_token(exclude, " ", " "); - while (enumerator->enumerate(enumerator, &token)) - { - errno = 0; - table = strtoul(token, NULL, 10); - - if (errno == 0) - { - this->rt_exclude->insert_last(this->rt_exclude, (void*)table); - } - } - enumerator->destroy(enumerator); - } - - if (register_for_events) - { - struct sockaddr_nl addr; - - memset(&addr, 0, sizeof(addr)); - addr.nl_family = AF_NETLINK; - - /* create and bind RT socket for events (address/interface/route changes) */ - this->socket_events = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); - if (this->socket_events < 0) - { - DBG1(DBG_KNL, "unable to create RT event socket"); - destroy(this); - return NULL; - } - addr.nl_groups = RTMGRP_IPV4_IFADDR | RTMGRP_IPV6_IFADDR | - RTMGRP_IPV4_ROUTE | RTMGRP_IPV6_ROUTE | RTMGRP_LINK; - if (bind(this->socket_events, (struct sockaddr*)&addr, sizeof(addr))) - { - DBG1(DBG_KNL, "unable to bind RT event socket"); - destroy(this); - return NULL; - } - - lib->watcher->add(lib->watcher, this->socket_events, WATCHER_READ, - (watcher_cb_t)receive_events, this); - } - - if (init_address_list(this) != SUCCESS) - { - DBG1(DBG_KNL, "unable to get interface list"); - destroy(this); - return NULL; - } - - if (this->routing_table) - { - if (manage_rule(this, RTM_NEWRULE, AF_INET, this->routing_table, - this->routing_table_prio) != SUCCESS) - { - DBG1(DBG_KNL, "unable to create IPv4 routing table rule"); - } - if (manage_rule(this, RTM_NEWRULE, AF_INET6, this->routing_table, - this->routing_table_prio) != SUCCESS) - { - DBG1(DBG_KNL, "unable to create IPv6 routing table rule"); - } - } - - return &this->public; -} diff --git a/src/libhydra/plugins/kernel_netlink/kernel_netlink_net.h b/src/libhydra/plugins/kernel_netlink/kernel_netlink_net.h deleted file mode 100644 index ff9831d3c..000000000 --- a/src/libhydra/plugins/kernel_netlink/kernel_netlink_net.h +++ /dev/null @@ -1,46 +0,0 @@ -/* - * Copyright (C) 2008 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -/** - * @defgroup kernel_netlink_net_i kernel_netlink_net - * @{ @ingroup kernel_netlink - */ - -#ifndef KERNEL_NETLINK_NET_H_ -#define KERNEL_NETLINK_NET_H_ - -#include <kernel/kernel_net.h> - -typedef struct kernel_netlink_net_t kernel_netlink_net_t; - -/** - * Implementation of the kernel network interface using Netlink. - */ -struct kernel_netlink_net_t { - - /** - * Implements kernel_net_t interface - */ - kernel_net_t interface; -}; - -/** - * Create a netlink kernel network interface instance. - * - * @return kernel_netlink_net_t instance - */ -kernel_netlink_net_t *kernel_netlink_net_create(); - -#endif /** KERNEL_NETLINK_NET_H_ @}*/ diff --git a/src/libhydra/plugins/kernel_netlink/kernel_netlink_plugin.c b/src/libhydra/plugins/kernel_netlink/kernel_netlink_plugin.c deleted file mode 100644 index 8d5a0d5e8..000000000 --- a/src/libhydra/plugins/kernel_netlink/kernel_netlink_plugin.c +++ /dev/null @@ -1,87 +0,0 @@ -/* - * Copyright (C) 2008 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - - -#include "kernel_netlink_plugin.h" - -#include "kernel_netlink_ipsec.h" -#include "kernel_netlink_net.h" - -#include <hydra.h> - -typedef struct private_kernel_netlink_plugin_t private_kernel_netlink_plugin_t; - -/** - * private data of kernel netlink plugin - */ -struct private_kernel_netlink_plugin_t { - /** - * implements plugin interface - */ - kernel_netlink_plugin_t public; -}; - -METHOD(plugin_t, get_name, char*, - private_kernel_netlink_plugin_t *this) -{ - return "kernel-netlink"; -} - -METHOD(plugin_t, get_features, int, - private_kernel_netlink_plugin_t *this, plugin_feature_t *features[]) -{ - static plugin_feature_t f[] = { - PLUGIN_CALLBACK(kernel_ipsec_register, kernel_netlink_ipsec_create), - PLUGIN_PROVIDE(CUSTOM, "kernel-ipsec"), - PLUGIN_CALLBACK(kernel_net_register, kernel_netlink_net_create), - PLUGIN_PROVIDE(CUSTOM, "kernel-net"), - }; - *features = f; - return countof(f); -} - -METHOD(plugin_t, destroy, void, - private_kernel_netlink_plugin_t *this) -{ - free(this); -} - -/* - * see header file - */ -plugin_t *kernel_netlink_plugin_create() -{ - private_kernel_netlink_plugin_t *this; - - if (!lib->caps->keep(lib->caps, CAP_NET_ADMIN)) - { /* required to bind/use XFRM sockets / create/modify routing tables, but - * not if only the read-only parts of kernel-netlink-net are used, so - * we don't fail here */ - DBG1(DBG_KNL, "kernel-netlink plugin might require CAP_NET_ADMIN " - "capability"); - } - - INIT(this, - .public = { - .plugin = { - .get_name = _get_name, - .get_features = _get_features, - .destroy = _destroy, - }, - }, - ); - - return &this->public.plugin; -} diff --git a/src/libhydra/plugins/kernel_netlink/kernel_netlink_plugin.h b/src/libhydra/plugins/kernel_netlink/kernel_netlink_plugin.h deleted file mode 100644 index a795486ca..000000000 --- a/src/libhydra/plugins/kernel_netlink/kernel_netlink_plugin.h +++ /dev/null @@ -1,42 +0,0 @@ -/* - * Copyright (C) 2008 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -/** - * @defgroup kernel_netlink kernel_netlink - * @ingroup hplugins - * - * @defgroup kernel_netlink_plugin kernel_netlink_plugin - * @{ @ingroup kernel_netlink - */ - -#ifndef KERNEL_NETLINK_PLUGIN_H_ -#define KERNEL_NETLINK_PLUGIN_H_ - -#include <plugins/plugin.h> - -typedef struct kernel_netlink_plugin_t kernel_netlink_plugin_t; - -/** - * netlink kernel interface plugin - */ -struct kernel_netlink_plugin_t { - - /** - * implements plugin interface - */ - plugin_t plugin; -}; - -#endif /** KERNEL_NETLINK_PLUGIN_H_ @}*/ diff --git a/src/libhydra/plugins/kernel_netlink/kernel_netlink_shared.c b/src/libhydra/plugins/kernel_netlink/kernel_netlink_shared.c deleted file mode 100644 index f7ce992a3..000000000 --- a/src/libhydra/plugins/kernel_netlink/kernel_netlink_shared.c +++ /dev/null @@ -1,655 +0,0 @@ -/* - * Copyright (C) 2014 Martin Willi - * Copyright (C) 2014 revosec AG - * Copyright (C) 2008 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -#include <sys/socket.h> -#include <linux/netlink.h> -#include <linux/rtnetlink.h> -#include <linux/xfrm.h> -#include <errno.h> -#include <unistd.h> - -#include "kernel_netlink_shared.h" - -#include <utils/debug.h> -#include <threading/mutex.h> -#include <threading/condvar.h> -#include <collections/array.h> -#include <collections/hashtable.h> - -typedef struct private_netlink_socket_t private_netlink_socket_t; - -/** - * Private variables and functions of netlink_socket_t class. - */ -struct private_netlink_socket_t { - - /** - * public part of the netlink_socket_t object. - */ - netlink_socket_t public; - - /** - * mutex to lock access entries - */ - mutex_t *mutex; - - /** - * Netlink request entries currently active, uintptr_t seq => entry_t - */ - hashtable_t *entries; - - /** - * Current sequence number for Netlink requests - */ - refcount_t seq; - - /** - * netlink socket - */ - int socket; - - /** - * Netlink protocol - */ - int protocol; - - /** - * Enum names for Netlink messages - */ - enum_name_t *names; - - /** - * Timeout for Netlink replies, in ms - */ - u_int timeout; - - /** - * Number of times to repeat timed out queries - */ - u_int retries; - - /** - * Buffer size for received Netlink messages - */ - u_int buflen; - - /** - * Use parallel netlink queries - */ - bool parallel; - - /** - * Ignore errors potentially resulting from a retransmission - */ - bool ignore_retransmit_errors; -}; - -/** - * #definable hook to simulate request message loss - */ -#ifdef NETLINK_MSG_LOSS_HOOK -bool NETLINK_MSG_LOSS_HOOK(struct nlmsghdr *msg); -#define msg_loss_hook(msg) NETLINK_MSG_LOSS_HOOK(msg) -#else -#define msg_loss_hook(msg) FALSE -#endif - -/** - * Request entry the answer for a waiting thread is collected in - */ -typedef struct { - /** Condition variable thread is waiting */ - condvar_t *condvar; - /** Array of hdrs in a multi-message response, as struct nlmsghdr* */ - array_t *hdrs; - /** All response messages received? */ - bool complete; -} entry_t; - -/** - * Clean up a thread waiting entry - */ -static void destroy_entry(entry_t *entry) -{ - entry->condvar->destroy(entry->condvar); - array_destroy_function(entry->hdrs, (void*)free, NULL); - free(entry); -} - -/** - * Write a Netlink message to socket - */ -static bool write_msg(private_netlink_socket_t *this, struct nlmsghdr *msg) -{ - struct sockaddr_nl addr = { - .nl_family = AF_NETLINK, - }; - int len; - - if (msg_loss_hook(msg)) - { - return TRUE; - } - - while (TRUE) - { - len = sendto(this->socket, msg, msg->nlmsg_len, 0, - (struct sockaddr*)&addr, sizeof(addr)); - if (len != msg->nlmsg_len) - { - if (errno == EINTR) - { - continue; - } - DBG1(DBG_KNL, "netlink write error: %s", strerror(errno)); - return FALSE; - } - return TRUE; - } -} - -/** - * Read a single Netlink message from socket, return 0 on error, -1 on timeout - */ -static ssize_t read_msg(private_netlink_socket_t *this, - char *buf, size_t buflen, bool block) -{ - ssize_t len; - - if (block) - { - fd_set set; - timeval_t tv = {}; - - FD_ZERO(&set); - FD_SET(this->socket, &set); - timeval_add_ms(&tv, this->timeout); - - if (select(this->socket + 1, &set, NULL, NULL, - this->timeout ? &tv : NULL) <= 0) - { - return -1; - } - } - len = recv(this->socket, buf, buflen, MSG_TRUNC|(block ? 0 : MSG_DONTWAIT)); - if (len > buflen) - { - DBG1(DBG_KNL, "netlink response exceeds buffer size"); - return 0; - } - if (len < 0) - { - if (errno != EAGAIN && errno != EWOULDBLOCK && errno != EINTR) - { - DBG1(DBG_KNL, "netlink read error: %s", strerror(errno)); - } - return 0; - } - return len; -} - -/** - * Queue received response message - */ -static bool queue(private_netlink_socket_t *this, struct nlmsghdr *buf) -{ - struct nlmsghdr *hdr; - entry_t *entry; - uintptr_t seq; - - seq = (uintptr_t)buf->nlmsg_seq; - - this->mutex->lock(this->mutex); - entry = this->entries->get(this->entries, (void*)seq); - if (entry) - { - hdr = malloc(buf->nlmsg_len); - memcpy(hdr, buf, buf->nlmsg_len); - array_insert(entry->hdrs, ARRAY_TAIL, hdr); - if (hdr->nlmsg_type == NLMSG_DONE || !(hdr->nlmsg_flags & NLM_F_MULTI)) - { - entry->complete = TRUE; - entry->condvar->signal(entry->condvar); - } - } - else - { - DBG1(DBG_KNL, "received unknown netlink seq %u, ignored", seq); - } - this->mutex->unlock(this->mutex); - - return entry != NULL; -} - -/** - * Read and queue response message, optionally blocking, returns TRUE on timeout - */ -static bool read_and_queue(private_netlink_socket_t *this, bool block) -{ - struct nlmsghdr *hdr; - char buf[this->buflen]; - ssize_t len; - - len = read_msg(this, buf, sizeof(buf), block); - if (len == -1) - { - return TRUE; - } - if (len) - { - hdr = (struct nlmsghdr*)buf; - while (NLMSG_OK(hdr, len)) - { - if (!queue(this, hdr)) - { - break; - } - hdr = NLMSG_NEXT(hdr, len); - } - } - return FALSE; -} - -CALLBACK(watch, bool, - private_netlink_socket_t *this, int fd, watcher_event_t event) -{ - if (event == WATCHER_READ) - { - read_and_queue(this, FALSE); - } - return TRUE; -} - -/** - * Send a netlink request, try once - */ -static status_t send_once(private_netlink_socket_t *this, struct nlmsghdr *in, - uintptr_t seq, struct nlmsghdr **out, size_t *out_len) -{ - struct nlmsghdr *hdr; - chunk_t result = {}; - entry_t *entry; - - in->nlmsg_seq = seq; - in->nlmsg_pid = getpid(); - - if (this->names) - { - DBG3(DBG_KNL, "sending %N %u: %b", this->names, in->nlmsg_type, - (u_int)seq, in, in->nlmsg_len); - } - - this->mutex->lock(this->mutex); - if (!write_msg(this, in)) - { - this->mutex->unlock(this->mutex); - return FAILED; - } - - INIT(entry, - .condvar = condvar_create(CONDVAR_TYPE_DEFAULT), - .hdrs = array_create(0, 0), - ); - this->entries->put(this->entries, (void*)seq, entry); - - while (!entry->complete) - { - if (this->parallel && - lib->watcher->get_state(lib->watcher) == WATCHER_RUNNING) - { - if (this->timeout) - { - if (entry->condvar->timed_wait(entry->condvar, this->mutex, - this->timeout)) - { - break; - } - } - else - { - entry->condvar->wait(entry->condvar, this->mutex); - } - } - else - { /* During (de-)initialization, no watcher thread is active. - * collect responses ourselves. */ - if (read_and_queue(this, TRUE)) - { - break; - } - } - } - this->entries->remove(this->entries, (void*)seq); - - this->mutex->unlock(this->mutex); - - if (!entry->complete) - { /* timeout */ - destroy_entry(entry); - return OUT_OF_RES; - } - - while (array_remove(entry->hdrs, ARRAY_HEAD, &hdr)) - { - if (this->names) - { - DBG3(DBG_KNL, "received %N %u: %b", this->names, hdr->nlmsg_type, - hdr->nlmsg_seq, hdr, hdr->nlmsg_len); - } - result = chunk_cat("mm", result, - chunk_create((char*)hdr, hdr->nlmsg_len)); - } - destroy_entry(entry); - - *out_len = result.len; - *out = (struct nlmsghdr*)result.ptr; - - return SUCCESS; -} - -/** - * Ignore errors for message types that might have completed previously - */ -static void ignore_retransmit_error(private_netlink_socket_t *this, - struct nlmsgerr *err, int type) -{ - switch (err->error) - { - case -EEXIST: - switch (this->protocol) - { - case NETLINK_XFRM: - switch (type) - { - case XFRM_MSG_NEWPOLICY: - case XFRM_MSG_NEWSA: - err->error = 0; - break; - } - break; - case NETLINK_ROUTE: - switch (type) - { - case RTM_NEWADDR: - case RTM_NEWLINK: - case RTM_NEWNEIGH: - case RTM_NEWROUTE: - case RTM_NEWRULE: - err->error = 0; - break; - } - break; - } - break; - case -ENOENT: - switch (this->protocol) - { - case NETLINK_XFRM: - switch (type) - { - case XFRM_MSG_DELPOLICY: - case XFRM_MSG_DELSA: - err->error = 0; - break; - } - break; - case NETLINK_ROUTE: - switch (type) - { - case RTM_DELADDR: - case RTM_DELLINK: - case RTM_DELNEIGH: - case RTM_DELROUTE: - case RTM_DELRULE: - err->error = 0; - break; - } - break; - } - break; - } -} - -METHOD(netlink_socket_t, netlink_send, status_t, - private_netlink_socket_t *this, struct nlmsghdr *in, struct nlmsghdr **out, - size_t *out_len) -{ - uintptr_t seq; - u_int try; - - seq = ref_get(&this->seq); - - for (try = 0; try <= this->retries; ++try) - { - struct nlmsghdr *hdr; - status_t status; - size_t len; - - if (try > 0) - { - DBG1(DBG_KNL, "retransmitting Netlink request (%u/%u)", - try, this->retries); - } - status = send_once(this, in, seq, &hdr, &len); - switch (status) - { - case SUCCESS: - break; - case OUT_OF_RES: - continue; - default: - return status; - } - if (hdr->nlmsg_type == NLMSG_ERROR) - { - struct nlmsgerr* err; - - err = NLMSG_DATA(hdr); - if (err->error == -EBUSY) - { - free(hdr); - try--; - continue; - } - if (this->ignore_retransmit_errors && try > 0) - { - ignore_retransmit_error(this, err, in->nlmsg_type); - } - } - *out = hdr; - *out_len = len; - return SUCCESS; - } - DBG1(DBG_KNL, "Netlink request timed out after %u retransmits", - this->retries); - return OUT_OF_RES; -} - -METHOD(netlink_socket_t, netlink_send_ack, status_t, - private_netlink_socket_t *this, struct nlmsghdr *in) -{ - struct nlmsghdr *out, *hdr; - size_t len; - - if (netlink_send(this, in, &out, &len) != SUCCESS) - { - return FAILED; - } - hdr = out; - while (NLMSG_OK(hdr, len)) - { - switch (hdr->nlmsg_type) - { - case NLMSG_ERROR: - { - struct nlmsgerr* err = NLMSG_DATA(hdr); - - if (err->error) - { - if (-err->error == EEXIST) - { /* do not report existing routes */ - free(out); - return ALREADY_DONE; - } - if (-err->error == ESRCH) - { /* do not report missing entries */ - free(out); - return NOT_FOUND; - } - DBG1(DBG_KNL, "received netlink error: %s (%d)", - strerror(-err->error), -err->error); - free(out); - return FAILED; - } - free(out); - return SUCCESS; - } - default: - hdr = NLMSG_NEXT(hdr, len); - continue; - case NLMSG_DONE: - break; - } - break; - } - DBG1(DBG_KNL, "netlink request not acknowledged"); - free(out); - return FAILED; -} - -METHOD(netlink_socket_t, destroy, void, - private_netlink_socket_t *this) -{ - if (this->socket != -1) - { - if (this->parallel) - { - lib->watcher->remove(lib->watcher, this->socket); - } - close(this->socket); - } - this->entries->destroy(this->entries); - this->mutex->destroy(this->mutex); - free(this); -} - -/** - * Described in header. - */ -netlink_socket_t *netlink_socket_create(int protocol, enum_name_t *names, - bool parallel) -{ - private_netlink_socket_t *this; - struct sockaddr_nl addr = { - .nl_family = AF_NETLINK, - }; - - INIT(this, - .public = { - .send = _netlink_send, - .send_ack = _netlink_send_ack, - .destroy = _destroy, - }, - .seq = 200, - .mutex = mutex_create(MUTEX_TYPE_RECURSIVE), - .socket = socket(AF_NETLINK, SOCK_RAW, protocol), - .entries = hashtable_create(hashtable_hash_ptr, hashtable_equals_ptr, 4), - .protocol = protocol, - .names = names, - .buflen = lib->settings->get_int(lib->settings, - "%s.plugins.kernel-netlink.buflen", 0, lib->ns), - .timeout = lib->settings->get_int(lib->settings, - "%s.plugins.kernel-netlink.timeout", 0, lib->ns), - .retries = lib->settings->get_int(lib->settings, - "%s.plugins.kernel-netlink.retries", 0, lib->ns), - .ignore_retransmit_errors = lib->settings->get_bool(lib->settings, - "%s.plugins.kernel-netlink.ignore_retransmit_errors", - FALSE, lib->ns), - .parallel = parallel, - ); - - if (!this->buflen) - { - long pagesize = sysconf(_SC_PAGESIZE); - if (pagesize == -1) - { - pagesize = 4096; - } - /* base this on NLMSG_GOODSIZE */ - this->buflen = min(pagesize, 8192); - } - if (this->socket == -1) - { - DBG1(DBG_KNL, "unable to create netlink socket"); - destroy(this); - return NULL; - } - if (bind(this->socket, (struct sockaddr*)&addr, sizeof(addr))) - { - DBG1(DBG_KNL, "unable to bind netlink socket"); - destroy(this); - return NULL; - } - if (this->parallel) - { - lib->watcher->add(lib->watcher, this->socket, WATCHER_READ, watch, this); - } - - return &this->public; -} - -/** - * Described in header. - */ -void netlink_add_attribute(struct nlmsghdr *hdr, int rta_type, chunk_t data, - size_t buflen) -{ - struct rtattr *rta; - - if (NLMSG_ALIGN(hdr->nlmsg_len) + RTA_LENGTH(data.len) > buflen) - { - DBG1(DBG_KNL, "unable to add attribute, buffer too small"); - return; - } - - rta = (struct rtattr*)(((char*)hdr) + NLMSG_ALIGN(hdr->nlmsg_len)); - rta->rta_type = rta_type; - rta->rta_len = RTA_LENGTH(data.len); - memcpy(RTA_DATA(rta), data.ptr, data.len); - hdr->nlmsg_len = NLMSG_ALIGN(hdr->nlmsg_len) + rta->rta_len; -} - -/** - * Described in header. - */ -void* netlink_reserve(struct nlmsghdr *hdr, int buflen, int type, int len) -{ - struct rtattr *rta; - - if (NLMSG_ALIGN(hdr->nlmsg_len) + RTA_LENGTH(len) > buflen) - { - DBG1(DBG_KNL, "unable to add attribute, buffer too small"); - return NULL; - } - - rta = ((void*)hdr) + NLMSG_ALIGN(hdr->nlmsg_len); - rta->rta_type = type; - rta->rta_len = RTA_LENGTH(len); - hdr->nlmsg_len = NLMSG_ALIGN(hdr->nlmsg_len) + rta->rta_len; - - return RTA_DATA(rta); -} diff --git a/src/libhydra/plugins/kernel_netlink/kernel_netlink_shared.h b/src/libhydra/plugins/kernel_netlink/kernel_netlink_shared.h deleted file mode 100644 index 66682907d..000000000 --- a/src/libhydra/plugins/kernel_netlink/kernel_netlink_shared.h +++ /dev/null @@ -1,96 +0,0 @@ -/* - * Copyright (C) 2008 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -#ifndef KERNEL_NETLINK_SHARED_H_ -#define KERNEL_NETLINK_SHARED_H_ - -#include <library.h> - -#include <linux/rtnetlink.h> - -/** - * General purpose netlink buffer. - * - * 1024 byte is currently sufficient for all operations. Some platform - * require an enforced aligment to four bytes (e.g. ARM). - */ -typedef union { - struct nlmsghdr hdr; - u_char bytes[1024]; -} netlink_buf_t __attribute__((aligned(RTA_ALIGNTO))); - -typedef struct netlink_socket_t netlink_socket_t; - -/** - * Wrapper around a netlink socket. - */ -struct netlink_socket_t { - - /** - * Send a netlink message and wait for a reply. - * - * @param in netlink message to send - * @param out received netlink message - * @param out_len length of the received message - */ - status_t (*send)(netlink_socket_t *this, struct nlmsghdr *in, - struct nlmsghdr **out, size_t *out_len); - - /** - * Send a netlink message and wait for its acknowledge. - * - * @param in netlink message to send - */ - status_t (*send_ack)(netlink_socket_t *this, struct nlmsghdr *in); - - /** - * Destroy the socket. - */ - void (*destroy)(netlink_socket_t *this); -}; - -/** - * Create a netlink_socket_t object. - * - * @param protocol protocol type (e.g. NETLINK_XFRM or NETLINK_ROUTE) - * @param names optional enum names for Netlink messages - * @param parallel support parallel queries on this Netlink socket - */ -netlink_socket_t *netlink_socket_create(int protocol, enum_name_t *names, - bool parallel); - -/** - * Creates an rtattr and adds it to the given netlink message. - * - * @param hdr netlink message - * @param rta_type type of the rtattr - * @param data data to add to the rtattr - * @param buflen length of the netlink message buffer - */ -void netlink_add_attribute(struct nlmsghdr *hdr, int rta_type, chunk_t data, - size_t buflen); - -/** - * Reserve space in a netlink message for given size and type, returning buffer. - * - * @param hdr netlink message - * @param buflen size of full netlink buffer - * @param type RTA type - * @param len length of RTA data - * @return buffer to len bytes of attribute data, NULL on error - */ -void* netlink_reserve(struct nlmsghdr *hdr, int buflen, int type, int len); - -#endif /* KERNEL_NETLINK_SHARED_H_ */ diff --git a/src/libhydra/plugins/kernel_netlink/suites/test_socket.c b/src/libhydra/plugins/kernel_netlink/suites/test_socket.c deleted file mode 100644 index 3e8facd0a..000000000 --- a/src/libhydra/plugins/kernel_netlink/suites/test_socket.c +++ /dev/null @@ -1,302 +0,0 @@ -/* - * Copyright (C) 2014 Martin Willi - * Copyright (C) 2014 revosec AG - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -#include <test_suite.h> - -#include <threading/thread.h> - -#include "../kernel_netlink_shared.h" - -/** - * Netlink message drop configuration - */ -static int drop_interval = 0; - -/** - * Netlink message drop hook - */ -bool netlink_msg_loss(struct nlmsghdr *hdr) -{ - static refcount_t i; - - if (drop_interval) - { - return ref_get(&i) % drop_interval == drop_interval - 1; - } - return FALSE; -} - -START_TEST(test_echo) -{ - netlink_socket_t *s; - struct nlmsghdr *out; - struct rtmsg *msg; - char dst[] = { - 127,0,0,1 - }; - size_t len; - netlink_buf_t request = { - .hdr = { - .nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)), - .nlmsg_flags = NLM_F_REQUEST, - .nlmsg_type = RTM_GETROUTE, - }, - }; - - msg = NLMSG_DATA(&request.hdr); - msg->rtm_family = AF_INET; - netlink_add_attribute(&request.hdr, RTA_DST, - chunk_from_thing(dst), sizeof(request)); - - s = netlink_socket_create(NETLINK_ROUTE, NULL, _i != 0); - - ck_assert(s->send(s, &request.hdr, &out, &len) == SUCCESS); - ck_assert_int_eq(out->nlmsg_type, RTM_NEWROUTE); - free(out); - s->destroy(s); -} -END_TEST - -START_TEST(test_echo_dump) -{ - netlink_socket_t *s; - struct nlmsghdr *out, *current; - struct rtgenmsg *msg; - size_t len; - netlink_buf_t request = { - .hdr = { - .nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg)), - .nlmsg_flags = NLM_F_REQUEST | NLM_F_MATCH | NLM_F_ROOT, - .nlmsg_type = RTM_GETLINK, - }, - }; - - s = netlink_socket_create(NETLINK_ROUTE, NULL, _i != 0); - msg = NLMSG_DATA(&request.hdr); - msg->rtgen_family = AF_UNSPEC; - - ck_assert(s->send(s, &request.hdr, &out, &len) == SUCCESS); - current = out; - while (TRUE) - { - ck_assert(NLMSG_OK(current, len)); - if (current->nlmsg_type == NLMSG_DONE) - { - break; - } - ck_assert_int_eq(current->nlmsg_type, RTM_NEWLINK); - current = NLMSG_NEXT(current, len); - } - free(out); - s->destroy(s); -} -END_TEST - -CALLBACK(stress, void*, - netlink_socket_t *s) -{ - struct nlmsghdr *out; - struct rtmsg *msg; - char dst[] = { - 127,0,0,1 - }; - size_t len; - int i; - netlink_buf_t request = { - .hdr = { - .nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)), - .nlmsg_flags = NLM_F_REQUEST, - .nlmsg_type = RTM_GETROUTE, - }, - }; - - for (i = 0; i < 10; i++) - { - msg = NLMSG_DATA(&request.hdr); - msg->rtm_family = AF_INET; - netlink_add_attribute(&request.hdr, RTA_DST, - chunk_from_thing(dst), sizeof(request)); - - ck_assert(s->send(s, &request.hdr, &out, &len) == SUCCESS); - ck_assert_int_eq(out->nlmsg_type, RTM_NEWROUTE); - free(out); - } - return NULL; -} - -CALLBACK(stress_dump, void*, - netlink_socket_t *s) -{ - struct nlmsghdr *out, *current; - struct rtgenmsg *msg; - size_t len; - int i; - netlink_buf_t request = { - .hdr = { - .nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg)), - .nlmsg_flags = NLM_F_REQUEST | NLM_F_MATCH | NLM_F_ROOT, - .nlmsg_type = RTM_GETLINK, - }, - }; - - msg = NLMSG_DATA(&request.hdr); - msg->rtgen_family = AF_UNSPEC; - - for (i = 0; i < 10; i++) - { - ck_assert(s->send(s, &request.hdr, &out, &len) == SUCCESS); - current = out; - while (TRUE) - { - ck_assert(NLMSG_OK(current, len)); - if (current->nlmsg_type == NLMSG_DONE) - { - break; - } - ck_assert_int_eq(current->nlmsg_type, RTM_NEWLINK); - current = NLMSG_NEXT(current, len); - } - free(out); - } - return NULL; -} - -START_TEST(test_stress) -{ - thread_t *threads[10]; - netlink_socket_t *s; - int i; - - s = netlink_socket_create(NETLINK_ROUTE, NULL, _i != 0); - for (i = 0; i < countof(threads); i++) - { - threads[i] = thread_create(stress, s); - } - for (i = 0; i < countof(threads); i++) - { - threads[i]->join(threads[i]); - } - s->destroy(s); -} -END_TEST - -START_TEST(test_stress_dump) -{ - thread_t *threads[10]; - netlink_socket_t *s; - int i; - - s = netlink_socket_create(NETLINK_ROUTE, NULL, _i != 0); - for (i = 0; i < countof(threads); i++) - { - threads[i] = thread_create(stress_dump, s); - } - for (i = 0; i < countof(threads); i++) - { - threads[i]->join(threads[i]); - } - s->destroy(s); -} -END_TEST - -START_TEST(test_retransmit_success) -{ - netlink_socket_t *s; - struct nlmsghdr *out; - struct rtgenmsg *msg; - size_t len; - netlink_buf_t request = { - .hdr = { - .nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg)), - .nlmsg_flags = NLM_F_REQUEST | NLM_F_MATCH | NLM_F_ROOT, - .nlmsg_type = RTM_GETLINK, - }, - }; - - drop_interval = 2; - - lib->settings->set_int(lib->settings, - "%s.plugins.kernel-netlink.timeout", 100, lib->ns); - lib->settings->set_int(lib->settings, - "%s.plugins.kernel-netlink.retries", 1, lib->ns); - - s = netlink_socket_create(NETLINK_ROUTE, NULL, _i != 0); - msg = NLMSG_DATA(&request.hdr); - msg->rtgen_family = AF_UNSPEC; - - ck_assert(s->send(s, &request.hdr, &out, &len) == SUCCESS); - free(out); - s->destroy(s); - - drop_interval = 0; -} -END_TEST - -START_TEST(test_retransmit_fail) -{ - netlink_socket_t *s; - struct nlmsghdr *out; - struct rtgenmsg *msg; - size_t len; - netlink_buf_t request = { - .hdr = { - .nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg)), - .nlmsg_flags = NLM_F_REQUEST | NLM_F_MATCH | NLM_F_ROOT, - .nlmsg_type = RTM_GETLINK, - }, - }; - - drop_interval = 1; - - lib->settings->set_int(lib->settings, - "%s.plugins.kernel-netlink.timeout", 50, lib->ns); - lib->settings->set_int(lib->settings, - "%s.plugins.kernel-netlink.retries", 3, lib->ns); - - s = netlink_socket_create(NETLINK_ROUTE, NULL, _i != 0); - msg = NLMSG_DATA(&request.hdr); - msg->rtgen_family = AF_UNSPEC; - - ck_assert(s->send(s, &request.hdr, &out, &len) == OUT_OF_RES); - s->destroy(s); - - drop_interval = 0; -} -END_TEST - -Suite *socket_suite_create() -{ - Suite *s; - TCase *tc; - - s = suite_create("netlink socket"); - - tc = tcase_create("echo"); - tcase_add_loop_test(tc, test_echo, 0, 2); - tcase_add_loop_test(tc, test_echo_dump, 0, 2); - suite_add_tcase(s, tc); - - tc = tcase_create("stress"); - tcase_add_loop_test(tc, test_stress, 0, 2); - tcase_add_loop_test(tc, test_stress_dump, 0, 2); - suite_add_tcase(s, tc); - - tc = tcase_create("retransmit"); - tcase_add_loop_test(tc, test_retransmit_success, 0, 2); - tcase_add_loop_test(tc, test_retransmit_fail, 0, 2); - suite_add_tcase(s, tc); - - return s; -} diff --git a/src/libhydra/plugins/kernel_netlink/tests.c b/src/libhydra/plugins/kernel_netlink/tests.c deleted file mode 100644 index 52985b438..000000000 --- a/src/libhydra/plugins/kernel_netlink/tests.c +++ /dev/null @@ -1,49 +0,0 @@ -/* - * Copyright (C) 2014 Martin Willi - * Copyright (C) 2014 revosec AG - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -#include <test_runner.h> - -#include <hydra.h> - -/* declare test suite constructors */ -#define TEST_SUITE(x) test_suite_t* x(); -#include "tests.h" -#undef TEST_SUITE - -static test_configuration_t tests[] = { -#define TEST_SUITE(x) \ - { .suite = x, }, -#include "tests.h" - { .suite = NULL, } -}; - -static bool test_runner_init(bool init) -{ - if (init) - { - lib->processor->set_threads(lib->processor, 8); - } - else - { - lib->processor->set_threads(lib->processor, 0); - lib->processor->cancel(lib->processor); - } - return TRUE; -} - -int main(int argc, char *argv[]) -{ - return test_runner_run("kernel-netlink", tests, test_runner_init); -} diff --git a/src/libhydra/plugins/kernel_netlink/tests.h b/src/libhydra/plugins/kernel_netlink/tests.h deleted file mode 100644 index 2b6715a78..000000000 --- a/src/libhydra/plugins/kernel_netlink/tests.h +++ /dev/null @@ -1,16 +0,0 @@ -/* - * Copyright (C) 2014 Martin Willi - * Copyright (C) 2014 revosec AG - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -TEST_SUITE(socket_suite_create) diff --git a/src/libhydra/plugins/kernel_pfkey/Makefile.am b/src/libhydra/plugins/kernel_pfkey/Makefile.am deleted file mode 100644 index f645528d9..000000000 --- a/src/libhydra/plugins/kernel_pfkey/Makefile.am +++ /dev/null @@ -1,19 +0,0 @@ -AM_CPPFLAGS = \ - -I${linux_headers} \ - -I$(top_srcdir)/src/libstrongswan \ - -I$(top_srcdir)/src/libhydra - -AM_CFLAGS = \ - $(PLUGIN_CFLAGS) - -if MONOLITHIC -noinst_LTLIBRARIES = libstrongswan-kernel-pfkey.la -else -plugin_LTLIBRARIES = libstrongswan-kernel-pfkey.la -endif - -libstrongswan_kernel_pfkey_la_SOURCES = \ - kernel_pfkey_plugin.h kernel_pfkey_plugin.c \ - kernel_pfkey_ipsec.h kernel_pfkey_ipsec.c - -libstrongswan_kernel_pfkey_la_LDFLAGS = -module -avoid-version diff --git a/src/libhydra/plugins/kernel_pfkey/Makefile.in b/src/libhydra/plugins/kernel_pfkey/Makefile.in deleted file mode 100644 index 177d2f23f..000000000 --- a/src/libhydra/plugins/kernel_pfkey/Makefile.in +++ /dev/null @@ -1,780 +0,0 @@ -# Makefile.in generated by automake 1.14.1 from Makefile.am. -# @configure_input@ - -# Copyright (C) 1994-2013 Free Software Foundation, Inc. - -# This Makefile.in is free software; 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See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ -/* - * Copyright (C) 2014 Nanoteq Pty Ltd - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#include <stdint.h> -#include <sys/types.h> -#include <sys/socket.h> - -#ifdef __FreeBSD__ -#include <limits.h> /* for LONG_MAX */ -#endif - -#ifdef HAVE_NET_PFKEYV2_H -#include <net/pfkeyv2.h> -#else -#include <linux/pfkeyv2.h> -#endif - -#ifdef SADB_X_EXT_NAT_T_TYPE -#define HAVE_NATT -#endif - -#ifdef HAVE_NETIPSEC_IPSEC_H -#include <netipsec/ipsec.h> -#elif defined(HAVE_NETINET6_IPSEC_H) -#include <netinet6/ipsec.h> -#else -#include <linux/ipsec.h> -#endif - -#ifdef HAVE_NATT -#ifdef HAVE_LINUX_UDP_H -#include <linux/udp.h> -#else -#include <netinet/udp.h> -#endif /*HAVE_LINUX_UDP_H*/ -#endif /*HAVE_NATT*/ - -#include <unistd.h> -#include <time.h> -#include <errno.h> -#ifdef __APPLE__ -#include <sys/sysctl.h> -#endif - -#include "kernel_pfkey_ipsec.h" - -#include <hydra.h> -#include <utils/debug.h> -#include <networking/host.h> -#include <collections/linked_list.h> -#include <collections/hashtable.h> -#include <threading/mutex.h> - -/** non linux specific */ -#ifndef IPPROTO_COMP -#ifdef IPPROTO_IPCOMP -#define IPPROTO_COMP IPPROTO_IPCOMP -#endif -#endif - -#ifndef SADB_X_AALG_SHA2_256HMAC -#define SADB_X_AALG_SHA2_256HMAC SADB_X_AALG_SHA2_256 -#define SADB_X_AALG_SHA2_384HMAC SADB_X_AALG_SHA2_384 -#define SADB_X_AALG_SHA2_512HMAC SADB_X_AALG_SHA2_512 -#endif - -#ifndef SADB_X_EALG_AESCBC -#define SADB_X_EALG_AESCBC SADB_X_EALG_AES -#endif - -#ifndef SADB_X_EALG_CASTCBC -#define SADB_X_EALG_CASTCBC SADB_X_EALG_CAST128CBC -#endif - -#if !defined(SADB_X_EALG_AES_GCM_ICV8) && defined(SADB_X_EALG_AESGCM8) -#define SADB_X_EALG_AES_GCM_ICV8 SADB_X_EALG_AESGCM8 -#define SADB_X_EALG_AES_GCM_ICV12 SADB_X_EALG_AESGCM12 -#define SADB_X_EALG_AES_GCM_ICV16 SADB_X_EALG_AESGCM16 -#endif - -#ifndef SOL_IP -#define SOL_IP IPPROTO_IP -#define SOL_IPV6 IPPROTO_IPV6 -#endif - -/** from linux/in.h */ -#ifndef IP_IPSEC_POLICY -#define IP_IPSEC_POLICY 16 -#endif - -/** missing on uclibc */ -#ifndef IPV6_IPSEC_POLICY -#define IPV6_IPSEC_POLICY 34 -#endif - -/* from linux/udp.h */ -#ifndef UDP_ENCAP -#define UDP_ENCAP 100 -#endif - -#ifndef UDP_ENCAP_ESPINUDP -#define UDP_ENCAP_ESPINUDP 2 -#endif - -/* this is not defined on some platforms */ -#ifndef SOL_UDP -#define SOL_UDP IPPROTO_UDP -#endif - -/** base priority for installed policies */ -#define PRIO_BASE 384 - -#ifdef __APPLE__ -/** from xnu/bsd/net/pfkeyv2.h */ -#define SADB_X_EXT_NATT 0x002 - struct sadb_sa_2 { - struct sadb_sa sa; - u_int16_t sadb_sa_natt_port; - u_int16_t sadb_reserved0; - u_int32_t sadb_reserved1; - }; -#endif - -/** buffer size for PF_KEY messages */ -#define PFKEY_BUFFER_SIZE 4096 - -/** PF_KEY messages are 64 bit aligned */ -#define PFKEY_ALIGNMENT 8 -/** aligns len to 64 bits */ -#define PFKEY_ALIGN(len) (((len) + PFKEY_ALIGNMENT - 1) & ~(PFKEY_ALIGNMENT - 1)) -/** calculates the properly padded length in 64 bit chunks */ -#define PFKEY_LEN(len) ((PFKEY_ALIGN(len) / PFKEY_ALIGNMENT)) -/** calculates user mode length i.e. in bytes */ -#define PFKEY_USER_LEN(len) ((len) * PFKEY_ALIGNMENT) - -/** given a PF_KEY message header and an extension this updates the length in the header */ -#define PFKEY_EXT_ADD(msg, ext) ((msg)->sadb_msg_len += ((struct sadb_ext*)ext)->sadb_ext_len) -/** given a PF_KEY message header this returns a pointer to the next extension */ -#define PFKEY_EXT_ADD_NEXT(msg) ((struct sadb_ext*)(((char*)(msg)) + PFKEY_USER_LEN((msg)->sadb_msg_len))) -/** copy an extension and append it to a PF_KEY message */ -#define PFKEY_EXT_COPY(msg, ext) (PFKEY_EXT_ADD(msg, memcpy(PFKEY_EXT_ADD_NEXT(msg), ext, PFKEY_USER_LEN(((struct sadb_ext*)ext)->sadb_ext_len)))) -/** given a PF_KEY extension this returns a pointer to the next extension */ -#define PFKEY_EXT_NEXT(ext) ((struct sadb_ext*)(((char*)(ext)) + PFKEY_USER_LEN(((struct sadb_ext*)ext)->sadb_ext_len))) -/** given a PF_KEY extension this returns a pointer to the next extension also updates len (len in 64 bit words) */ -#define PFKEY_EXT_NEXT_LEN(ext,len) ((len) -= (ext)->sadb_ext_len, PFKEY_EXT_NEXT(ext)) -/** true if ext has a valid length and len is large enough to contain ext (assuming len in 64 bit words) */ -#define PFKEY_EXT_OK(ext,len) ((len) >= PFKEY_LEN(sizeof(struct sadb_ext)) && \ - (ext)->sadb_ext_len >= PFKEY_LEN(sizeof(struct sadb_ext)) && \ - (ext)->sadb_ext_len <= (len)) - -typedef struct private_kernel_pfkey_ipsec_t private_kernel_pfkey_ipsec_t; - -/** - * Private variables and functions of kernel_pfkey class. - */ -struct private_kernel_pfkey_ipsec_t -{ - /** - * Public part of the kernel_pfkey_t object. - */ - kernel_pfkey_ipsec_t public; - - /** - * mutex to lock access to various lists - */ - mutex_t *mutex; - - /** - * List of installed policies (policy_entry_t) - */ - linked_list_t *policies; - - /** - * List of exclude routes (exclude_route_t) - */ - linked_list_t *excludes; - - /** - * Hash table of IPsec SAs using policies (ipsec_sa_t) - */ - hashtable_t *sas; - - /** - * whether to install routes along policies - */ - bool install_routes; - - /** - * mutex to lock access to the PF_KEY socket - */ - mutex_t *mutex_pfkey; - - /** - * PF_KEY socket to communicate with the kernel - */ - int socket; - - /** - * PF_KEY socket to receive acquire and expire events - */ - int socket_events; - - /** - * sequence number for messages sent to the kernel - */ - int seq; -}; - -typedef struct exclude_route_t exclude_route_t; - -/** - * Exclude route definition - */ -struct exclude_route_t { - /** destination address of exclude */ - host_t *dst; - /** source address for route */ - host_t *src; - /** nexthop exclude has been installed */ - host_t *gtw; - /** references to this route */ - int refs; -}; - -/** - * clean up a route exclude entry - */ -static void exclude_route_destroy(exclude_route_t *this) -{ - this->dst->destroy(this->dst); - this->src->destroy(this->src); - this->gtw->destroy(this->gtw); - free(this); -} - -typedef struct route_entry_t route_entry_t; - -/** - * installed routing entry - */ -struct route_entry_t { - /** name of the interface the route is bound to */ - char *if_name; - - /** source ip of the route */ - host_t *src_ip; - - /** gateway for this route */ - host_t *gateway; - - /** destination net */ - chunk_t dst_net; - - /** destination net prefixlen */ - u_int8_t prefixlen; - - /** reference to exclude route, if any */ - exclude_route_t *exclude; -}; - -/** - * destroy an route_entry_t object - */ -static void route_entry_destroy(route_entry_t *this) -{ - free(this->if_name); - DESTROY_IF(this->src_ip); - DESTROY_IF(this->gateway); - chunk_free(&this->dst_net); - free(this); -} - -/** - * compare two route_entry_t objects - */ -static bool route_entry_equals(route_entry_t *a, route_entry_t *b) -{ - return a->if_name && b->if_name && streq(a->if_name, b->if_name) && - a->src_ip->ip_equals(a->src_ip, b->src_ip) && - a->gateway && b->gateway && - a->gateway->ip_equals(a->gateway, b->gateway) && - chunk_equals(a->dst_net, b->dst_net) && a->prefixlen == b->prefixlen; -} - -typedef struct ipsec_sa_t ipsec_sa_t; - -/** - * IPsec SA assigned to a policy. - */ -struct ipsec_sa_t { - /** Source address of this SA */ - host_t *src; - - /** Destination address of this SA */ - host_t *dst; - - /** Description of this SA */ - ipsec_sa_cfg_t cfg; - - /** Reference count for this SA */ - refcount_t refcount; -}; - -/** - * Hash function for ipsec_sa_t objects - */ -static u_int ipsec_sa_hash(ipsec_sa_t *sa) -{ - return chunk_hash_inc(sa->src->get_address(sa->src), - chunk_hash_inc(sa->dst->get_address(sa->dst), - chunk_hash(chunk_from_thing(sa->cfg)))); -} - -/** - * Equality function for ipsec_sa_t objects - */ -static bool ipsec_sa_equals(ipsec_sa_t *sa, ipsec_sa_t *other_sa) -{ - return sa->src->ip_equals(sa->src, other_sa->src) && - sa->dst->ip_equals(sa->dst, other_sa->dst) && - memeq(&sa->cfg, &other_sa->cfg, sizeof(ipsec_sa_cfg_t)); -} - -/** - * Allocate or reference an IPsec SA object - */ -static ipsec_sa_t *ipsec_sa_create(private_kernel_pfkey_ipsec_t *this, - host_t *src, host_t *dst, - ipsec_sa_cfg_t *cfg) -{ - ipsec_sa_t *sa, *found; - INIT(sa, - .src = src, - .dst = dst, - .cfg = *cfg, - ); - found = this->sas->get(this->sas, sa); - if (!found) - { - sa->src = src->clone(src); - sa->dst = dst->clone(dst); - this->sas->put(this->sas, sa, sa); - } - else - { - free(sa); - sa = found; - } - ref_get(&sa->refcount); - return sa; -} - -/** - * Release and destroy an IPsec SA object - */ -static void ipsec_sa_destroy(private_kernel_pfkey_ipsec_t *this, - ipsec_sa_t *sa) -{ - if (ref_put(&sa->refcount)) - { - this->sas->remove(this->sas, sa); - DESTROY_IF(sa->src); - DESTROY_IF(sa->dst); - free(sa); - } -} - -typedef struct policy_sa_t policy_sa_t; -typedef struct policy_sa_in_t policy_sa_in_t; - -/** - * Mapping between a policy and an IPsec SA. - */ -struct policy_sa_t { - /** Priority assigned to the policy when installed with this SA */ - u_int32_t priority; - - /** Type of the policy */ - policy_type_t type; - - /** Assigned SA */ - ipsec_sa_t *sa; -}; - -/** - * For input policies we also cache the traffic selectors in order to install - * the route. - */ -struct policy_sa_in_t { - /** Generic interface */ - policy_sa_t generic; - - /** Source traffic selector of this policy */ - traffic_selector_t *src_ts; - - /** Destination traffic selector of this policy */ - traffic_selector_t *dst_ts; -}; - -/** - * Create a policy_sa(_in)_t object - */ -static policy_sa_t *policy_sa_create(private_kernel_pfkey_ipsec_t *this, - policy_dir_t dir, policy_type_t type, host_t *src, host_t *dst, - traffic_selector_t *src_ts, traffic_selector_t *dst_ts, ipsec_sa_cfg_t *cfg) -{ - policy_sa_t *policy; - - if (dir == POLICY_IN) - { - policy_sa_in_t *in; - INIT(in, - .src_ts = src_ts->clone(src_ts), - .dst_ts = dst_ts->clone(dst_ts), - ); - policy = &in->generic; - } - else - { - INIT(policy, .priority = 0); - } - policy->type = type; - policy->sa = ipsec_sa_create(this, src, dst, cfg); - return policy; -} - -/** - * Destroy a policy_sa(_in)_t object - */ -static void policy_sa_destroy(policy_sa_t *policy, policy_dir_t *dir, - private_kernel_pfkey_ipsec_t *this) -{ - if (*dir == POLICY_IN) - { - policy_sa_in_t *in = (policy_sa_in_t*)policy; - in->src_ts->destroy(in->src_ts); - in->dst_ts->destroy(in->dst_ts); - } - ipsec_sa_destroy(this, policy->sa); - free(policy); -} - -typedef struct policy_entry_t policy_entry_t; - -/** - * installed kernel policy. - */ -struct policy_entry_t { - /** Index assigned by the kernel */ - u_int32_t index; - - /** Direction of this policy: in, out, forward */ - u_int8_t direction; - - /** Parameters of installed policy */ - struct { - /** Subnet and port */ - host_t *net; - /** Subnet mask */ - u_int8_t mask; - /** Protocol */ - u_int8_t proto; - } src, dst; - - /** Associated route installed for this policy */ - route_entry_t *route; - - /** List of SAs this policy is used by, ordered by priority */ - linked_list_t *used_by; -}; - -/** - * Create a policy_entry_t object - */ -static policy_entry_t *create_policy_entry(traffic_selector_t *src_ts, - traffic_selector_t *dst_ts, - policy_dir_t dir) -{ - policy_entry_t *policy; - INIT(policy, - .direction = dir, - ); - u_int16_t port; - u_int8_t proto; - - src_ts->to_subnet(src_ts, &policy->src.net, &policy->src.mask); - dst_ts->to_subnet(dst_ts, &policy->dst.net, &policy->dst.mask); - - /* src or dest proto may be "any" (0), use more restrictive one */ - proto = max(src_ts->get_protocol(src_ts), dst_ts->get_protocol(dst_ts)); - /* map the ports to ICMP type/code how the Linux kernel expects them, that - * is, type in src, code in dst */ - if (proto == IPPROTO_ICMP || proto == IPPROTO_ICMPV6) - { - port = max(policy->src.net->get_port(policy->src.net), - policy->dst.net->get_port(policy->dst.net)); - policy->src.net->set_port(policy->src.net, - traffic_selector_icmp_type(port)); - policy->dst.net->set_port(policy->dst.net, - traffic_selector_icmp_code(port)); - } - else if (!proto) - { - proto = IPSEC_PROTO_ANY; - } - policy->src.proto = policy->dst.proto = proto; - - return policy; -} - -/** - * Destroy a policy_entry_t object - */ -static void policy_entry_destroy(policy_entry_t *policy, - private_kernel_pfkey_ipsec_t *this) -{ - if (policy->route) - { - route_entry_destroy(policy->route); - } - if (policy->used_by) - { - policy->used_by->invoke_function(policy->used_by, - (linked_list_invoke_t)policy_sa_destroy, - &policy->direction, this); - policy->used_by->destroy(policy->used_by); - } - DESTROY_IF(policy->src.net); - DESTROY_IF(policy->dst.net); - free(policy); -} - -/** - * compares two policy_entry_t - */ -static inline bool policy_entry_equals(policy_entry_t *current, - policy_entry_t *policy) -{ - return current->direction == policy->direction && - current->src.proto == policy->src.proto && - current->dst.proto == policy->dst.proto && - current->src.mask == policy->src.mask && - current->dst.mask == policy->dst.mask && - current->src.net->equals(current->src.net, policy->src.net) && - current->dst.net->equals(current->dst.net, policy->dst.net); -} - -/** - * compare the given kernel index with that of a policy - */ -static inline bool policy_entry_match_byindex(policy_entry_t *current, - u_int32_t *index) -{ - return current->index == *index; -} - -/** - * Calculate the priority of a policy - */ -static inline u_int32_t get_priority(policy_entry_t *policy, - policy_priority_t prio) -{ - u_int32_t priority = PRIO_BASE; - switch (prio) - { - case POLICY_PRIORITY_FALLBACK: - priority <<= 1; - /* fall-through */ - case POLICY_PRIORITY_ROUTED: - priority <<= 1; - /* fall-through */ - case POLICY_PRIORITY_DEFAULT: - priority <<= 1; - /* fall-trough */ - case POLICY_PRIORITY_PASS: - break; - } - /* calculate priority based on selector size, small size = high prio */ - priority -= policy->src.mask; - priority -= policy->dst.mask; - priority <<= 2; /* make some room for the two flags */ - priority += policy->src.net->get_port(policy->src.net) || - policy->dst.net->get_port(policy->dst.net) ? - 0 : 2; - priority += policy->src.proto != IPSEC_PROTO_ANY ? 0 : 1; - return priority; -} - -typedef struct pfkey_msg_t pfkey_msg_t; - -struct pfkey_msg_t -{ - /** - * PF_KEY message base - */ - struct sadb_msg *msg; - - /** - * PF_KEY message extensions - */ - union { - struct sadb_ext *ext[SADB_EXT_MAX + 1]; - struct { - struct sadb_ext *reserved; /* SADB_EXT_RESERVED */ - struct sadb_sa *sa; /* SADB_EXT_SA */ - struct sadb_lifetime *lft_current; /* SADB_EXT_LIFETIME_CURRENT */ - struct sadb_lifetime *lft_hard; /* SADB_EXT_LIFETIME_HARD */ - struct sadb_lifetime *lft_soft; /* SADB_EXT_LIFETIME_SOFT */ - struct sadb_address *src; /* SADB_EXT_ADDRESS_SRC */ - struct sadb_address *dst; /* SADB_EXT_ADDRESS_DST */ - struct sadb_address *proxy; /* SADB_EXT_ADDRESS_PROXY */ - struct sadb_key *key_auth; /* SADB_EXT_KEY_AUTH */ - struct sadb_key *key_encr; /* SADB_EXT_KEY_ENCRYPT */ - struct sadb_ident *id_src; /* SADB_EXT_IDENTITY_SRC */ - struct sadb_ident *id_dst; /* SADB_EXT_IDENTITY_DST */ - struct sadb_sens *sensitivity; /* SADB_EXT_SENSITIVITY */ - struct sadb_prop *proposal; /* SADB_EXT_PROPOSAL */ - struct sadb_supported *supported_auth; /* SADB_EXT_SUPPORTED_AUTH */ - struct sadb_supported *supported_encr; /* SADB_EXT_SUPPORTED_ENCRYPT */ - struct sadb_spirange *spirange; /* SADB_EXT_SPIRANGE */ - struct sadb_x_kmprivate *x_kmprivate; /* SADB_X_EXT_KMPRIVATE */ - struct sadb_x_policy *x_policy; /* SADB_X_EXT_POLICY */ - struct sadb_x_sa2 *x_sa2; /* SADB_X_EXT_SA2 */ - struct sadb_x_nat_t_type *x_natt_type; /* SADB_X_EXT_NAT_T_TYPE */ - struct sadb_x_nat_t_port *x_natt_sport; /* SADB_X_EXT_NAT_T_SPORT */ - struct sadb_x_nat_t_port *x_natt_dport; /* SADB_X_EXT_NAT_T_DPORT */ - struct sadb_address *x_natt_oa; /* SADB_X_EXT_NAT_T_OA */ - struct sadb_x_sec_ctx *x_sec_ctx; /* SADB_X_EXT_SEC_CTX */ - struct sadb_x_kmaddress *x_kmaddress; /* SADB_X_EXT_KMADDRESS */ - } __attribute__((__packed__)); - }; -}; - -ENUM(sadb_ext_type_names, SADB_EXT_RESERVED, SADB_EXT_MAX, - "SADB_EXT_RESERVED", - "SADB_EXT_SA", - "SADB_EXT_LIFETIME_CURRENT", - "SADB_EXT_LIFETIME_HARD", - "SADB_EXT_LIFETIME_SOFT", - "SADB_EXT_ADDRESS_SRC", - "SADB_EXT_ADDRESS_DST", - "SADB_EXT_ADDRESS_PROXY", - "SADB_EXT_KEY_AUTH", - "SADB_EXT_KEY_ENCRYPT", - "SADB_EXT_IDENTITY_SRC", - "SADB_EXT_IDENTITY_DST", - "SADB_EXT_SENSITIVITY", - "SADB_EXT_PROPOSAL", - "SADB_EXT_SUPPORTED_AUTH", - "SADB_EXT_SUPPORTED_ENCRYPT", - "SADB_EXT_SPIRANGE", - "SADB_X_EXT_KMPRIVATE", - "SADB_X_EXT_POLICY", - "SADB_X_EXT_SA2", - "SADB_X_EXT_NAT_T_TYPE", - "SADB_X_EXT_NAT_T_SPORT", - "SADB_X_EXT_NAT_T_DPORT", - "SADB_X_EXT_NAT_T_OA", - "SADB_X_EXT_SEC_CTX", - "SADB_X_EXT_KMADDRESS" -); - -/** - * convert a protocol identifier to the PF_KEY sa type - */ -static u_int8_t proto2satype(u_int8_t proto) -{ - switch (proto) - { - case IPPROTO_ESP: - return SADB_SATYPE_ESP; - case IPPROTO_AH: - return SADB_SATYPE_AH; - case IPPROTO_COMP: - return SADB_X_SATYPE_IPCOMP; - default: - return proto; - } -} - -/** - * convert a PF_KEY sa type to a protocol identifier - */ -static u_int8_t satype2proto(u_int8_t satype) -{ - switch (satype) - { - case SADB_SATYPE_ESP: - return IPPROTO_ESP; - case SADB_SATYPE_AH: - return IPPROTO_AH; - case SADB_X_SATYPE_IPCOMP: - return IPPROTO_COMP; - default: - return satype; - } -} - -/** - * convert the general ipsec mode to the one defined in ipsec.h - */ -static u_int8_t mode2kernel(ipsec_mode_t mode) -{ - switch (mode) - { - case MODE_TRANSPORT: - return IPSEC_MODE_TRANSPORT; - case MODE_TUNNEL: - return IPSEC_MODE_TUNNEL; -#ifdef HAVE_IPSEC_MODE_BEET - case MODE_BEET: - return IPSEC_MODE_BEET; -#endif - default: - return mode; - } -} - -/** - * convert the general policy direction to the one defined in ipsec.h - */ -static u_int8_t dir2kernel(policy_dir_t dir) -{ - switch (dir) - { - case POLICY_IN: - return IPSEC_DIR_INBOUND; - case POLICY_OUT: - return IPSEC_DIR_OUTBOUND; -#ifdef HAVE_IPSEC_DIR_FWD - case POLICY_FWD: - return IPSEC_DIR_FWD; -#endif - default: - return IPSEC_DIR_INVALID; - } -} - -/** - * convert the policy type to the one defined in ipsec.h - */ -static inline u_int16_t type2kernel(policy_type_t type) -{ - switch (type) - { - case POLICY_IPSEC: - return IPSEC_POLICY_IPSEC; - case POLICY_PASS: - return IPSEC_POLICY_NONE; - case POLICY_DROP: - return IPSEC_POLICY_DISCARD; - } - return type; -} - -#ifdef SADB_X_MIGRATE -/** - * convert the policy direction in ipsec.h to the general one. - */ -static policy_dir_t kernel2dir(u_int8_t dir) -{ - switch (dir) - { - case IPSEC_DIR_INBOUND: - return POLICY_IN; - case IPSEC_DIR_OUTBOUND: - return POLICY_OUT; -#ifdef HAVE_IPSEC_DIR_FWD - case IPSEC_DIR_FWD: - return POLICY_FWD; -#endif - default: - return dir; - } -} -#endif /*SADB_X_MIGRATE*/ - -typedef struct kernel_algorithm_t kernel_algorithm_t; - -/** - * Mapping of IKEv2 algorithms to PF_KEY algorithms - */ -struct kernel_algorithm_t { - /** - * Identifier specified in IKEv2 - */ - int ikev2; - - /** - * Identifier as defined in pfkeyv2.h - */ - int kernel; -}; - -#define END_OF_LIST -1 - -/** - * Algorithms for encryption - */ -static kernel_algorithm_t encryption_algs[] = { -/* {ENCR_DES_IV64, 0 }, */ - {ENCR_DES, SADB_EALG_DESCBC }, - {ENCR_3DES, SADB_EALG_3DESCBC }, -/* {ENCR_RC5, 0 }, */ -/* {ENCR_IDEA, 0 }, */ - {ENCR_CAST, SADB_X_EALG_CASTCBC }, - {ENCR_BLOWFISH, SADB_X_EALG_BLOWFISHCBC }, -/* {ENCR_3IDEA, 0 }, */ -/* {ENCR_DES_IV32, 0 }, */ - {ENCR_NULL, SADB_EALG_NULL }, - {ENCR_AES_CBC, SADB_X_EALG_AESCBC }, -#ifdef SADB_X_EALG_AESCTR - {ENCR_AES_CTR, SADB_X_EALG_AESCTR }, -#endif -/* {ENCR_AES_CCM_ICV8, SADB_X_EALG_AES_CCM_ICV8 }, */ -/* {ENCR_AES_CCM_ICV12, SADB_X_EALG_AES_CCM_ICV12 }, */ -/* {ENCR_AES_CCM_ICV16, SADB_X_EALG_AES_CCM_ICV16 }, */ -#ifdef SADB_X_EALG_AES_GCM_ICV8 /* assume the others are defined too */ - {ENCR_AES_GCM_ICV8, SADB_X_EALG_AES_GCM_ICV8 }, - {ENCR_AES_GCM_ICV12, SADB_X_EALG_AES_GCM_ICV12 }, - {ENCR_AES_GCM_ICV16, SADB_X_EALG_AES_GCM_ICV16 }, -#endif -#ifdef SADB_X_EALG_CAMELLIACBC - {ENCR_CAMELLIA_CBC, SADB_X_EALG_CAMELLIACBC }, -#endif - {END_OF_LIST, 0 }, -}; - -/** - * Algorithms for integrity protection - */ -static kernel_algorithm_t integrity_algs[] = { - {AUTH_HMAC_MD5_96, SADB_AALG_MD5HMAC }, - {AUTH_HMAC_SHA1_96, SADB_AALG_SHA1HMAC }, - {AUTH_HMAC_SHA2_256_128, SADB_X_AALG_SHA2_256HMAC }, - {AUTH_HMAC_SHA2_384_192, SADB_X_AALG_SHA2_384HMAC }, - {AUTH_HMAC_SHA2_512_256, SADB_X_AALG_SHA2_512HMAC }, -/* {AUTH_DES_MAC, 0, }, */ -/* {AUTH_KPDK_MD5, 0, }, */ -#ifdef SADB_X_AALG_AES_XCBC_MAC - {AUTH_AES_XCBC_96, SADB_X_AALG_AES_XCBC_MAC, }, -#endif - {END_OF_LIST, 0, }, -}; - -/** - * Algorithms for IPComp, unused yet - */ -static kernel_algorithm_t compression_algs[] = { -/* {IPCOMP_OUI, 0 }, */ - {IPCOMP_DEFLATE, SADB_X_CALG_DEFLATE }, -#ifdef SADB_X_CALG_LZS - {IPCOMP_LZS, SADB_X_CALG_LZS }, -#endif -#ifdef SADB_X_CALG_LZJH - {IPCOMP_LZJH, SADB_X_CALG_LZJH }, -#endif - {END_OF_LIST, 0 }, -}; - -/** - * Look up a kernel algorithm ID and its key size - */ -static int lookup_algorithm(transform_type_t type, int ikev2) -{ - kernel_algorithm_t *list; - u_int16_t alg = 0; - - switch (type) - { - case ENCRYPTION_ALGORITHM: - list = encryption_algs; - break; - case INTEGRITY_ALGORITHM: - list = integrity_algs; - break; - case COMPRESSION_ALGORITHM: - list = compression_algs; - break; - default: - return 0; - } - while (list->ikev2 != END_OF_LIST) - { - if (ikev2 == list->ikev2) - { - return list->kernel; - } - list++; - } - hydra->kernel_interface->lookup_algorithm(hydra->kernel_interface, ikev2, - type, &alg, NULL); - return alg; -} - -/** - * Helper to set a port in a sockaddr_t, the port has to be in host order - */ -static void set_port(sockaddr_t *addr, u_int16_t port) -{ - switch (addr->sa_family) - { - case AF_INET: - { - struct sockaddr_in *sin = (struct sockaddr_in*)addr; - sin->sin_port = htons(port); - break; - } - case AF_INET6: - { - struct sockaddr_in6 *sin6 = (struct sockaddr_in6*)addr; - sin6->sin6_port = htons(port); - break; - } - } -} - -/** - * Copy a host_t as sockaddr_t to the given memory location. - * @return the number of bytes copied - */ -static size_t hostcpy(void *dest, host_t *host, bool include_port) -{ - sockaddr_t *addr = host->get_sockaddr(host), *dest_addr = dest; - socklen_t *len = host->get_sockaddr_len(host); - - memcpy(dest, addr, *len); -#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN - dest_addr->sa_len = *len; -#endif - if (!include_port) - { - set_port(dest_addr, 0); - } - return *len; -} - -/** - * add a host to the given sadb_msg - */ -static void add_addr_ext(struct sadb_msg *msg, host_t *host, u_int16_t type, - u_int8_t proto, u_int8_t prefixlen, bool include_port) -{ - struct sadb_address *addr = (struct sadb_address*)PFKEY_EXT_ADD_NEXT(msg); - size_t len; - - addr->sadb_address_exttype = type; - addr->sadb_address_proto = proto; - addr->sadb_address_prefixlen = prefixlen; - len = hostcpy(addr + 1, host, include_port); - addr->sadb_address_len = PFKEY_LEN(sizeof(*addr) + len); - PFKEY_EXT_ADD(msg, addr); -} - -/** - * adds an empty address extension to the given sadb_msg - */ -static void add_anyaddr_ext(struct sadb_msg *msg, int family, u_int8_t type) -{ - socklen_t len = (family == AF_INET) ? sizeof(struct sockaddr_in) : - sizeof(struct sockaddr_in6); - struct sadb_address *addr = (struct sadb_address*)PFKEY_EXT_ADD_NEXT(msg); - addr->sadb_address_exttype = type; - sockaddr_t *saddr = (sockaddr_t*)(addr + 1); - saddr->sa_family = family; -#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN - saddr->sa_len = len; -#endif - addr->sadb_address_len = PFKEY_LEN(sizeof(*addr) + len); - PFKEY_EXT_ADD(msg, addr); -} - -#ifdef HAVE_NATT -/** - * add udp encap extensions to a sadb_msg - */ -static void add_encap_ext(struct sadb_msg *msg, host_t *src, host_t *dst) -{ - struct sadb_x_nat_t_type* nat_type; - struct sadb_x_nat_t_port* nat_port; - - nat_type = (struct sadb_x_nat_t_type*)PFKEY_EXT_ADD_NEXT(msg); - nat_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; - nat_type->sadb_x_nat_t_type_len = PFKEY_LEN(sizeof(*nat_type)); - nat_type->sadb_x_nat_t_type_type = UDP_ENCAP_ESPINUDP; - PFKEY_EXT_ADD(msg, nat_type); - - nat_port = (struct sadb_x_nat_t_port*)PFKEY_EXT_ADD_NEXT(msg); - nat_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; - nat_port->sadb_x_nat_t_port_len = PFKEY_LEN(sizeof(*nat_port)); - nat_port->sadb_x_nat_t_port_port = htons(src->get_port(src)); - PFKEY_EXT_ADD(msg, nat_port); - - nat_port = (struct sadb_x_nat_t_port*)PFKEY_EXT_ADD_NEXT(msg); - nat_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; - nat_port->sadb_x_nat_t_port_len = PFKEY_LEN(sizeof(*nat_port)); - nat_port->sadb_x_nat_t_port_port = htons(dst->get_port(dst)); - PFKEY_EXT_ADD(msg, nat_port); -} -#endif /*HAVE_NATT*/ - -/** - * Convert a sadb_address to a traffic_selector - */ -static traffic_selector_t* sadb_address2ts(struct sadb_address *address) -{ - traffic_selector_t *ts; - host_t *host; - u_int8_t proto; - - proto = address->sadb_address_proto; - proto = proto == IPSEC_PROTO_ANY ? 0 : proto; - - /* The Linux 2.6 kernel does not set the protocol and port information - * in the src and dst sadb_address extensions of the SADB_ACQUIRE message. - */ - host = host_create_from_sockaddr((sockaddr_t*)&address[1]); - ts = traffic_selector_create_from_subnet(host, - address->sadb_address_prefixlen, - proto, host->get_port(host), - host->get_port(host) ?: 65535); - return ts; -} - -/** - * Parses a pfkey message received from the kernel - */ -static status_t parse_pfkey_message(struct sadb_msg *msg, pfkey_msg_t *out) -{ - struct sadb_ext* ext; - size_t len; - - memset(out, 0, sizeof(pfkey_msg_t)); - out->msg = msg; - - len = msg->sadb_msg_len; - len -= PFKEY_LEN(sizeof(struct sadb_msg)); - - ext = (struct sadb_ext*)(((char*)msg) + sizeof(struct sadb_msg)); - - while (len >= PFKEY_LEN(sizeof(struct sadb_ext))) - { - DBG3(DBG_KNL, " %N", sadb_ext_type_names, ext->sadb_ext_type); - if (ext->sadb_ext_len < PFKEY_LEN(sizeof(struct sadb_ext)) || - ext->sadb_ext_len > len) - { - DBG1(DBG_KNL, "length of %N extension is invalid", - sadb_ext_type_names, ext->sadb_ext_type); - break; - } - - if ((ext->sadb_ext_type > SADB_EXT_MAX) || (!ext->sadb_ext_type)) - { - DBG1(DBG_KNL, "type of PF_KEY extension (%d) is invalid", - ext->sadb_ext_type); - break; - } - - if (out->ext[ext->sadb_ext_type]) - { - DBG1(DBG_KNL, "duplicate %N extension", - sadb_ext_type_names, ext->sadb_ext_type); - break; - } - - out->ext[ext->sadb_ext_type] = ext; - ext = PFKEY_EXT_NEXT_LEN(ext, len); - } - - if (len) - { - DBG1(DBG_KNL, "PF_KEY message length is invalid"); - return FAILED; - } - - return SUCCESS; -} - -/** - * Send a message to a specific PF_KEY socket and handle the response. - */ -static status_t pfkey_send_socket(private_kernel_pfkey_ipsec_t *this, int socket, - struct sadb_msg *in, struct sadb_msg **out, size_t *out_len) -{ - unsigned char buf[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg; - int in_len, len; - - this->mutex_pfkey->lock(this->mutex_pfkey); - - /* FIXME: our usage of sequence numbers is probably wrong. check RFC 2367, - * in particular the behavior in response to an SADB_ACQUIRE. */ - in->sadb_msg_seq = ++this->seq; - in->sadb_msg_pid = getpid(); - - in_len = PFKEY_USER_LEN(in->sadb_msg_len); - - while (TRUE) - { - len = send(socket, in, in_len, 0); - - if (len != in_len) - { - if (errno == EINTR) - { - /* interrupted, try again */ - continue; - } - this->mutex_pfkey->unlock(this->mutex_pfkey); - DBG1(DBG_KNL, "error sending to PF_KEY socket: %s", - strerror(errno)); - return FAILED; - } - break; - } - - while (TRUE) - { - msg = (struct sadb_msg*)buf; - - len = recv(socket, buf, sizeof(buf), 0); - - if (len < 0) - { - if (errno == EINTR) - { - DBG1(DBG_KNL, "got interrupted"); - /* interrupted, try again */ - continue; - } - DBG1(DBG_KNL, "error reading from PF_KEY socket: %s", - strerror(errno)); - this->mutex_pfkey->unlock(this->mutex_pfkey); - return FAILED; - } - if (len < sizeof(struct sadb_msg) || - msg->sadb_msg_len < PFKEY_LEN(sizeof(struct sadb_msg))) - { - DBG1(DBG_KNL, "received corrupted PF_KEY message"); - this->mutex_pfkey->unlock(this->mutex_pfkey); - return FAILED; - } - if (msg->sadb_msg_len > len / PFKEY_ALIGNMENT) - { - DBG1(DBG_KNL, "buffer was too small to receive the complete PF_KEY " - "message"); - this->mutex_pfkey->unlock(this->mutex_pfkey); - return FAILED; - } - if (msg->sadb_msg_pid != in->sadb_msg_pid) - { - DBG2(DBG_KNL, "received PF_KEY message is not intended for us"); - continue; - } - if (msg->sadb_msg_seq != this->seq) - { - DBG2(DBG_KNL, "received PF_KEY message with unexpected sequence " - "number, was %d expected %d", msg->sadb_msg_seq, - this->seq); - if (msg->sadb_msg_seq == 0) - { - /* FreeBSD and Mac OS X do this for the response to - * SADB_X_SPDGET (but not for the response to SADB_GET). - * FreeBSD: 'key_spdget' in /usr/src/sys/netipsec/key.c. */ - } - else if (msg->sadb_msg_seq < this->seq) - { - continue; - } - else - { - this->mutex_pfkey->unlock(this->mutex_pfkey); - return FAILED; - } - } - if (msg->sadb_msg_type != in->sadb_msg_type) - { - DBG2(DBG_KNL, "received PF_KEY message of wrong type, " - "was %d expected %d, ignoring", msg->sadb_msg_type, - in->sadb_msg_type); - } - break; - } - - *out_len = len; - *out = (struct sadb_msg*)malloc(len); - memcpy(*out, buf, len); - - this->mutex_pfkey->unlock(this->mutex_pfkey); - return SUCCESS; -} - -/** - * Send a message to the default PF_KEY socket and handle the response. - */ -static status_t pfkey_send(private_kernel_pfkey_ipsec_t *this, - struct sadb_msg *in, struct sadb_msg **out, - size_t *out_len) -{ - return pfkey_send_socket(this, this->socket, in, out, out_len); -} - -/** - * Process a SADB_ACQUIRE message from the kernel - */ -static void process_acquire(private_kernel_pfkey_ipsec_t *this, - struct sadb_msg* msg) -{ - pfkey_msg_t response; - u_int32_t index, reqid = 0; - traffic_selector_t *src_ts, *dst_ts; - policy_entry_t *policy; - policy_sa_t *sa; - - switch (msg->sadb_msg_satype) - { - case SADB_SATYPE_UNSPEC: - case SADB_SATYPE_ESP: - case SADB_SATYPE_AH: - break; - default: - /* acquire for AH/ESP only */ - return; - } - DBG2(DBG_KNL, "received an SADB_ACQUIRE"); - - if (parse_pfkey_message(msg, &response) != SUCCESS) - { - DBG1(DBG_KNL, "parsing SADB_ACQUIRE from kernel failed"); - return; - } - - index = response.x_policy->sadb_x_policy_id; - this->mutex->lock(this->mutex); - if (this->policies->find_first(this->policies, - (linked_list_match_t)policy_entry_match_byindex, - (void**)&policy, &index) == SUCCESS && - policy->used_by->get_first(policy->used_by, (void**)&sa) == SUCCESS) - { - reqid = sa->sa->cfg.reqid; - } - else - { - DBG1(DBG_KNL, "received an SADB_ACQUIRE with policy id %d but no " - "matching policy found", index); - } - this->mutex->unlock(this->mutex); - - src_ts = sadb_address2ts(response.src); - dst_ts = sadb_address2ts(response.dst); - - hydra->kernel_interface->acquire(hydra->kernel_interface, reqid, src_ts, - dst_ts); -} - -/** - * Process a SADB_EXPIRE message from the kernel - */ -static void process_expire(private_kernel_pfkey_ipsec_t *this, - struct sadb_msg* msg) -{ - pfkey_msg_t response; - u_int8_t protocol; - u_int32_t spi; - host_t *dst; - bool hard; - - DBG2(DBG_KNL, "received an SADB_EXPIRE"); - - if (parse_pfkey_message(msg, &response) != SUCCESS) - { - DBG1(DBG_KNL, "parsing SADB_EXPIRE from kernel failed"); - return; - } - - protocol = satype2proto(msg->sadb_msg_satype); - spi = response.sa->sadb_sa_spi; - hard = response.lft_hard != NULL; - - if (protocol == IPPROTO_ESP || protocol == IPPROTO_AH) - { - dst = host_create_from_sockaddr((sockaddr_t*)(response.dst + 1)); - if (dst) - { - hydra->kernel_interface->expire(hydra->kernel_interface, protocol, - spi, dst, hard); - dst->destroy(dst); - } - } -} - -#ifdef SADB_X_MIGRATE -/** - * Process a SADB_X_MIGRATE message from the kernel - */ -static void process_migrate(private_kernel_pfkey_ipsec_t *this, - struct sadb_msg* msg) -{ - pfkey_msg_t response; - traffic_selector_t *src_ts, *dst_ts; - policy_dir_t dir; - u_int32_t reqid = 0; - host_t *local = NULL, *remote = NULL; - - DBG2(DBG_KNL, "received an SADB_X_MIGRATE"); - - if (parse_pfkey_message(msg, &response) != SUCCESS) - { - DBG1(DBG_KNL, "parsing SADB_X_MIGRATE from kernel failed"); - return; - } - src_ts = sadb_address2ts(response.src); - dst_ts = sadb_address2ts(response.dst); - dir = kernel2dir(response.x_policy->sadb_x_policy_dir); - DBG2(DBG_KNL, " policy %R === %R %N, id %u", src_ts, dst_ts, - policy_dir_names, dir); - - /* SADB_X_EXT_KMADDRESS is not present in unpatched kernels < 2.6.28 */ - if (response.x_kmaddress) - { - sockaddr_t *local_addr, *remote_addr; - u_int32_t local_len; - - local_addr = (sockaddr_t*)&response.x_kmaddress[1]; - local = host_create_from_sockaddr(local_addr); - local_len = (local_addr->sa_family == AF_INET6)? - sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in); - remote_addr = (sockaddr_t*)((u_int8_t*)local_addr + local_len); - remote = host_create_from_sockaddr(remote_addr); - DBG2(DBG_KNL, " kmaddress: %H...%H", local, remote); - } - - if (src_ts && dst_ts && local && remote) - { - hydra->kernel_interface->migrate(hydra->kernel_interface, reqid, - src_ts, dst_ts, dir, local, remote); - } - else - { - DESTROY_IF(src_ts); - DESTROY_IF(dst_ts); - DESTROY_IF(local); - DESTROY_IF(remote); - } -} -#endif /*SADB_X_MIGRATE*/ - -#ifdef SADB_X_NAT_T_NEW_MAPPING -/** - * Process a SADB_X_NAT_T_NEW_MAPPING message from the kernel - */ -static void process_mapping(private_kernel_pfkey_ipsec_t *this, - struct sadb_msg* msg) -{ - pfkey_msg_t response; - u_int32_t spi; - sockaddr_t *sa; - host_t *dst, *new; - - DBG2(DBG_KNL, "received an SADB_X_NAT_T_NEW_MAPPING"); - - if (parse_pfkey_message(msg, &response) != SUCCESS) - { - DBG1(DBG_KNL, "parsing SADB_X_NAT_T_NEW_MAPPING from kernel failed"); - return; - } - - if (!response.x_sa2) - { - DBG1(DBG_KNL, "received SADB_X_NAT_T_NEW_MAPPING is missing required " - "information"); - return; - } - - spi = response.sa->sadb_sa_spi; - - if (satype2proto(msg->sadb_msg_satype) != IPPROTO_ESP) - { - return; - } - - sa = (sockaddr_t*)(response.dst + 1); - dst = host_create_from_sockaddr(sa); - switch (sa->sa_family) - { - case AF_INET: - { - struct sockaddr_in *sin = (struct sockaddr_in*)sa; - sin->sin_port = htons(response.x_natt_dport->sadb_x_nat_t_port_port); - break; - } - case AF_INET6: - { - struct sockaddr_in6 *sin6 = (struct sockaddr_in6*)sa; - sin6->sin6_port = htons(response.x_natt_dport->sadb_x_nat_t_port_port); - break; - } - default: - break; - } - if (dst) - { - new = host_create_from_sockaddr(sa); - if (new) - { - hydra->kernel_interface->mapping(hydra->kernel_interface, - IPPROTO_ESP, spi, dst, new); - new->destroy(new); - } - dst->destroy(dst); - } -} -#endif /*SADB_X_NAT_T_NEW_MAPPING*/ - -/** - * Receives events from kernel - */ -static bool receive_events(private_kernel_pfkey_ipsec_t *this, int fd, - watcher_event_t event) -{ - unsigned char buf[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg = (struct sadb_msg*)buf; - int len; - - len = recvfrom(this->socket_events, buf, sizeof(buf), MSG_DONTWAIT, NULL, 0); - if (len < 0) - { - switch (errno) - { - case EINTR: - /* interrupted, try again */ - return TRUE; - case EAGAIN: - /* no data ready, select again */ - return TRUE; - default: - DBG1(DBG_KNL, "unable to receive from PF_KEY event socket"); - sleep(1); - return TRUE; - } - } - - if (len < sizeof(struct sadb_msg) || - msg->sadb_msg_len < PFKEY_LEN(sizeof(struct sadb_msg))) - { - DBG2(DBG_KNL, "received corrupted PF_KEY message"); - return TRUE; - } - if (msg->sadb_msg_pid != 0) - { /* not from kernel. not interested, try another one */ - return TRUE; - } - if (msg->sadb_msg_len > len / PFKEY_ALIGNMENT) - { - DBG1(DBG_KNL, "buffer was too small to receive the complete " - "PF_KEY message"); - return TRUE; - } - - switch (msg->sadb_msg_type) - { - case SADB_ACQUIRE: - process_acquire(this, msg); - break; - case SADB_EXPIRE: - process_expire(this, msg); - break; -#ifdef SADB_X_MIGRATE - case SADB_X_MIGRATE: - process_migrate(this, msg); - break; -#endif /*SADB_X_MIGRATE*/ -#ifdef SADB_X_NAT_T_NEW_MAPPING - case SADB_X_NAT_T_NEW_MAPPING: - process_mapping(this, msg); - break; -#endif /*SADB_X_NAT_T_NEW_MAPPING*/ - default: - break; - } - - return TRUE; -} - -/** - * Get an SPI for a specific protocol from the kernel. - */ - -static status_t get_spi_internal(private_kernel_pfkey_ipsec_t *this, - host_t *src, host_t *dst, u_int8_t proto, u_int32_t min, u_int32_t max, - u_int32_t *spi) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg, *out; - struct sadb_spirange *range; - pfkey_msg_t response; - u_int32_t received_spi = 0; - size_t len; - - memset(&request, 0, sizeof(request)); - - msg = (struct sadb_msg*)request; - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = SADB_GETSPI; - msg->sadb_msg_satype = proto2satype(proto); - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - - add_addr_ext(msg, src, SADB_EXT_ADDRESS_SRC, 0, 0, FALSE); - add_addr_ext(msg, dst, SADB_EXT_ADDRESS_DST, 0, 0, FALSE); - - range = (struct sadb_spirange*)PFKEY_EXT_ADD_NEXT(msg); - range->sadb_spirange_exttype = SADB_EXT_SPIRANGE; - range->sadb_spirange_len = PFKEY_LEN(sizeof(struct sadb_spirange)); - range->sadb_spirange_min = min; - range->sadb_spirange_max = max; - PFKEY_EXT_ADD(msg, range); - - if (pfkey_send(this, msg, &out, &len) == SUCCESS) - { - if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "allocating SPI failed: %s (%d)", - strerror(out->sadb_msg_errno), out->sadb_msg_errno); - } - else if (parse_pfkey_message(out, &response) == SUCCESS) - { - received_spi = response.sa->sadb_sa_spi; - } - free(out); - } - - if (received_spi == 0) - { - return FAILED; - } - - *spi = received_spi; - return SUCCESS; -} - -METHOD(kernel_ipsec_t, get_spi, status_t, - private_kernel_pfkey_ipsec_t *this, host_t *src, host_t *dst, - u_int8_t protocol, u_int32_t *spi) -{ - if (get_spi_internal(this, src, dst, protocol, - 0xc0000000, 0xcFFFFFFF, spi) != SUCCESS) - { - DBG1(DBG_KNL, "unable to get SPI"); - return FAILED; - } - - DBG2(DBG_KNL, "got SPI %.8x", ntohl(*spi)); - return SUCCESS; -} - -METHOD(kernel_ipsec_t, get_cpi, status_t, - private_kernel_pfkey_ipsec_t *this, host_t *src, host_t *dst, - u_int16_t *cpi) -{ - u_int32_t received_spi = 0; - - DBG2(DBG_KNL, "getting CPI"); - - if (get_spi_internal(this, src, dst, IPPROTO_COMP, - 0x100, 0xEFFF, &received_spi) != SUCCESS) - { - DBG1(DBG_KNL, "unable to get CPI"); - return FAILED; - } - - *cpi = htons((u_int16_t)ntohl(received_spi)); - - DBG2(DBG_KNL, "got CPI %.4x", ntohs(*cpi)); - return SUCCESS; -} - -METHOD(kernel_ipsec_t, add_sa, status_t, - private_kernel_pfkey_ipsec_t *this, host_t *src, host_t *dst, u_int32_t spi, - u_int8_t protocol, u_int32_t reqid, mark_t mark, u_int32_t tfc, - lifetime_cfg_t *lifetime, u_int16_t enc_alg, chunk_t enc_key, - u_int16_t int_alg, chunk_t int_key, ipsec_mode_t mode, - u_int16_t ipcomp, u_int16_t cpi, u_int32_t replay_window, - bool initiator, bool encap, bool esn, bool inbound, bool update, - linked_list_t *src_ts, linked_list_t *dst_ts) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg, *out; - struct sadb_sa *sa; - struct sadb_x_sa2 *sa2; - struct sadb_lifetime *lft; - struct sadb_key *key; - size_t len; - - /* if IPComp is used, we install an additional IPComp SA. if the cpi is 0 - * we are in the recursive call below */ - if (ipcomp != IPCOMP_NONE && cpi != 0) - { - lifetime_cfg_t lft = {{0,0,0},{0,0,0},{0,0,0}}; - add_sa(this, src, dst, htonl(ntohs(cpi)), IPPROTO_COMP, reqid, mark, - tfc, &lft, ENCR_UNDEFINED, chunk_empty, AUTH_UNDEFINED, - chunk_empty, mode, ipcomp, 0, 0, FALSE, FALSE, FALSE, inbound, - update, NULL, NULL); - ipcomp = IPCOMP_NONE; - /* use transport mode ESP SA, IPComp uses tunnel mode */ - mode = MODE_TRANSPORT; - } - - if (update) - { - /* As we didn't know the reqid during SPI allocation, we used reqid - * zero. Unfortunately we can't SADB_UPDATE to the new reqid, hence we - * have to delete the SPI allocation state manually. The reqid - * selector does not count for that, therefore we have to delete - * that state before installing the new SA to avoid deleting the - * the new state after installing it. */ - mark_t zeromark = {0, 0}; - - if (this->public.interface.del_sa(&this->public.interface, - src, dst, spi, protocol, 0, zeromark) != SUCCESS) - { - DBG1(DBG_KNL, "deleting SPI allocation SA failed"); - } - } - - memset(&request, 0, sizeof(request)); - - DBG2(DBG_KNL, "adding SAD entry with SPI %.8x and reqid {%u}", - ntohl(spi), reqid); - - msg = (struct sadb_msg*)request; - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = SADB_ADD; - msg->sadb_msg_satype = proto2satype(protocol); - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - -#ifdef __APPLE__ - if (encap) - { - struct sadb_sa_2 *sa_2; - sa_2 = (struct sadb_sa_2*)PFKEY_EXT_ADD_NEXT(msg); - sa_2->sadb_sa_natt_port = dst->get_port(dst); - sa = &sa_2->sa; - sa->sadb_sa_flags |= SADB_X_EXT_NATT; - len = sizeof(struct sadb_sa_2); - } - else -#endif - { - sa = (struct sadb_sa*)PFKEY_EXT_ADD_NEXT(msg); - len = sizeof(struct sadb_sa); - } - sa->sadb_sa_exttype = SADB_EXT_SA; - sa->sadb_sa_len = PFKEY_LEN(len); - sa->sadb_sa_spi = spi; - if (protocol == IPPROTO_COMP) - { - sa->sadb_sa_encrypt = lookup_algorithm(COMPRESSION_ALGORITHM, ipcomp); - } - else - { - /* Linux interprets sadb_sa_replay as number of packets/bits in the - * replay window, whereas on BSD it's the size of the window in bytes */ -#ifdef __linux__ - sa->sadb_sa_replay = min(replay_window, 32); -#else - sa->sadb_sa_replay = (replay_window + 7) / 8; -#endif - sa->sadb_sa_auth = lookup_algorithm(INTEGRITY_ALGORITHM, int_alg); - sa->sadb_sa_encrypt = lookup_algorithm(ENCRYPTION_ALGORITHM, enc_alg); - } - PFKEY_EXT_ADD(msg, sa); - - sa2 = (struct sadb_x_sa2*)PFKEY_EXT_ADD_NEXT(msg); - sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2; - sa2->sadb_x_sa2_len = PFKEY_LEN(sizeof(struct sadb_spirange)); - sa2->sadb_x_sa2_mode = mode2kernel(mode); - sa2->sadb_x_sa2_reqid = reqid; - PFKEY_EXT_ADD(msg, sa2); - - add_addr_ext(msg, src, SADB_EXT_ADDRESS_SRC, 0, 0, FALSE); - add_addr_ext(msg, dst, SADB_EXT_ADDRESS_DST, 0, 0, FALSE); - - lft = (struct sadb_lifetime*)PFKEY_EXT_ADD_NEXT(msg); - lft->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; - lft->sadb_lifetime_len = PFKEY_LEN(sizeof(struct sadb_lifetime)); - lft->sadb_lifetime_allocations = lifetime->packets.rekey; - lft->sadb_lifetime_bytes = lifetime->bytes.rekey; - lft->sadb_lifetime_addtime = lifetime->time.rekey; - lft->sadb_lifetime_usetime = 0; /* we only use addtime */ - PFKEY_EXT_ADD(msg, lft); - - lft = (struct sadb_lifetime*)PFKEY_EXT_ADD_NEXT(msg); - lft->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; - lft->sadb_lifetime_len = PFKEY_LEN(sizeof(struct sadb_lifetime)); - lft->sadb_lifetime_allocations = lifetime->packets.life; - lft->sadb_lifetime_bytes = lifetime->bytes.life; - lft->sadb_lifetime_addtime = lifetime->time.life; - lft->sadb_lifetime_usetime = 0; /* we only use addtime */ - PFKEY_EXT_ADD(msg, lft); - - if (enc_alg != ENCR_UNDEFINED) - { - if (!sa->sadb_sa_encrypt) - { - DBG1(DBG_KNL, "algorithm %N not supported by kernel!", - encryption_algorithm_names, enc_alg); - return FAILED; - } - DBG2(DBG_KNL, " using encryption algorithm %N with key size %d", - encryption_algorithm_names, enc_alg, enc_key.len * 8); - - key = (struct sadb_key*)PFKEY_EXT_ADD_NEXT(msg); - key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT; - key->sadb_key_bits = enc_key.len * 8; - key->sadb_key_len = PFKEY_LEN(sizeof(struct sadb_key) + enc_key.len); - memcpy(key + 1, enc_key.ptr, enc_key.len); - - PFKEY_EXT_ADD(msg, key); - } - - if (int_alg != AUTH_UNDEFINED) - { - if (!sa->sadb_sa_auth) - { - DBG1(DBG_KNL, "algorithm %N not supported by kernel!", - integrity_algorithm_names, int_alg); - return FAILED; - } - DBG2(DBG_KNL, " using integrity algorithm %N with key size %d", - integrity_algorithm_names, int_alg, int_key.len * 8); - - key = (struct sadb_key*)PFKEY_EXT_ADD_NEXT(msg); - key->sadb_key_exttype = SADB_EXT_KEY_AUTH; - key->sadb_key_bits = int_key.len * 8; - key->sadb_key_len = PFKEY_LEN(sizeof(struct sadb_key) + int_key.len); - memcpy(key + 1, int_key.ptr, int_key.len); - - PFKEY_EXT_ADD(msg, key); - } - -#ifdef HAVE_NATT - if (encap) - { - add_encap_ext(msg, src, dst); - } -#endif /*HAVE_NATT*/ - - if (pfkey_send(this, msg, &out, &len) != SUCCESS) - { - DBG1(DBG_KNL, "unable to add SAD entry with SPI %.8x", ntohl(spi)); - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "unable to add SAD entry with SPI %.8x: %s (%d)", - ntohl(spi), strerror(out->sadb_msg_errno), out->sadb_msg_errno); - free(out); - return FAILED; - } - - free(out); - return SUCCESS; -} - -METHOD(kernel_ipsec_t, update_sa, status_t, - private_kernel_pfkey_ipsec_t *this, u_int32_t spi, u_int8_t protocol, - u_int16_t cpi, host_t *src, host_t *dst, host_t *new_src, host_t *new_dst, - bool encap, bool new_encap, mark_t mark) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg, *out; - struct sadb_sa *sa; - pfkey_msg_t response; - size_t len; - - /* we can't update the SA if any of the ip addresses have changed. - * that's because we can't use SADB_UPDATE and by deleting and readding the - * SA the sequence numbers would get lost */ - if (!src->ip_equals(src, new_src) || - !dst->ip_equals(dst, new_dst)) - { - DBG1(DBG_KNL, "unable to update SAD entry with SPI %.8x: address " - "changes are not supported", ntohl(spi)); - return NOT_SUPPORTED; - } - - /* if IPComp is used, we first update the IPComp SA */ - if (cpi) - { - update_sa(this, htonl(ntohs(cpi)), IPPROTO_COMP, 0, - src, dst, new_src, new_dst, FALSE, FALSE, mark); - } - - memset(&request, 0, sizeof(request)); - - DBG2(DBG_KNL, "querying SAD entry with SPI %.8x", ntohl(spi)); - - msg = (struct sadb_msg*)request; - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = SADB_GET; - msg->sadb_msg_satype = proto2satype(protocol); - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - - sa = (struct sadb_sa*)PFKEY_EXT_ADD_NEXT(msg); - sa->sadb_sa_exttype = SADB_EXT_SA; - sa->sadb_sa_len = PFKEY_LEN(sizeof(struct sadb_sa)); - sa->sadb_sa_spi = spi; - PFKEY_EXT_ADD(msg, sa); - - /* the kernel wants a SADB_EXT_ADDRESS_SRC to be present even though - * it is not used for anything. */ - add_anyaddr_ext(msg, dst->get_family(dst), SADB_EXT_ADDRESS_SRC); - add_addr_ext(msg, dst, SADB_EXT_ADDRESS_DST, 0, 0, FALSE); - - if (pfkey_send(this, msg, &out, &len) != SUCCESS) - { - DBG1(DBG_KNL, "unable to query SAD entry with SPI %.8x", ntohl(spi)); - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "unable to query SAD entry with SPI %.8x: %s (%d)", - ntohl(spi), strerror(out->sadb_msg_errno), - out->sadb_msg_errno); - free(out); - return FAILED; - } - else if (parse_pfkey_message(out, &response) != SUCCESS) - { - DBG1(DBG_KNL, "unable to query SAD entry with SPI %.8x: parsing " - "response from kernel failed", ntohl(spi)); - free(out); - return FAILED; - } - - DBG2(DBG_KNL, "updating SAD entry with SPI %.8x from %#H..%#H to %#H..%#H", - ntohl(spi), src, dst, new_src, new_dst); - - memset(&request, 0, sizeof(request)); - - msg = (struct sadb_msg*)request; - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = SADB_UPDATE; - msg->sadb_msg_satype = proto2satype(protocol); - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - -#ifdef __APPLE__ - { - struct sadb_sa_2 *sa_2; - sa_2 = (struct sadb_sa_2*)PFKEY_EXT_ADD_NEXT(msg); - sa_2->sa.sadb_sa_len = PFKEY_LEN(sizeof(struct sadb_sa_2)); - memcpy(&sa_2->sa, response.sa, sizeof(struct sadb_sa)); - if (encap) - { - sa_2->sadb_sa_natt_port = new_dst->get_port(new_dst); - sa_2->sa.sadb_sa_flags |= SADB_X_EXT_NATT; - } - } -#else - PFKEY_EXT_COPY(msg, response.sa); -#endif - PFKEY_EXT_COPY(msg, response.x_sa2); - - PFKEY_EXT_COPY(msg, response.src); - PFKEY_EXT_COPY(msg, response.dst); - - PFKEY_EXT_COPY(msg, response.lft_soft); - PFKEY_EXT_COPY(msg, response.lft_hard); - - if (response.key_encr) - { - PFKEY_EXT_COPY(msg, response.key_encr); - } - - if (response.key_auth) - { - PFKEY_EXT_COPY(msg, response.key_auth); - } - -#ifdef HAVE_NATT - if (new_encap) - { - add_encap_ext(msg, new_src, new_dst); - } -#endif /*HAVE_NATT*/ - - free(out); - - if (pfkey_send(this, msg, &out, &len) != SUCCESS) - { - DBG1(DBG_KNL, "unable to update SAD entry with SPI %.8x", ntohl(spi)); - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "unable to update SAD entry with SPI %.8x: %s (%d)", - ntohl(spi), strerror(out->sadb_msg_errno), - out->sadb_msg_errno); - free(out); - return FAILED; - } - free(out); - - return SUCCESS; -} - -METHOD(kernel_ipsec_t, query_sa, status_t, - private_kernel_pfkey_ipsec_t *this, host_t *src, host_t *dst, - u_int32_t spi, u_int8_t protocol, mark_t mark, - u_int64_t *bytes, u_int64_t *packets, time_t *time) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg, *out; - struct sadb_sa *sa; - pfkey_msg_t response; - size_t len; - - memset(&request, 0, sizeof(request)); - - DBG2(DBG_KNL, "querying SAD entry with SPI %.8x", ntohl(spi)); - - msg = (struct sadb_msg*)request; - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = SADB_GET; - msg->sadb_msg_satype = proto2satype(protocol); - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - - sa = (struct sadb_sa*)PFKEY_EXT_ADD_NEXT(msg); - sa->sadb_sa_exttype = SADB_EXT_SA; - sa->sadb_sa_len = PFKEY_LEN(sizeof(struct sadb_sa)); - sa->sadb_sa_spi = spi; - PFKEY_EXT_ADD(msg, sa); - - /* the Linux Kernel doesn't care for the src address, but other systems do - * (e.g. FreeBSD) - */ - add_addr_ext(msg, src, SADB_EXT_ADDRESS_SRC, 0, 0, FALSE); - add_addr_ext(msg, dst, SADB_EXT_ADDRESS_DST, 0, 0, FALSE); - - if (pfkey_send(this, msg, &out, &len) != SUCCESS) - { - DBG1(DBG_KNL, "unable to query SAD entry with SPI %.8x", ntohl(spi)); - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "unable to query SAD entry with SPI %.8x: %s (%d)", - ntohl(spi), strerror(out->sadb_msg_errno), - out->sadb_msg_errno); - free(out); - return FAILED; - } - else if (parse_pfkey_message(out, &response) != SUCCESS) - { - DBG1(DBG_KNL, "unable to query SAD entry with SPI %.8x", ntohl(spi)); - free(out); - return FAILED; - } - if (bytes) - { - *bytes = response.lft_current->sadb_lifetime_bytes; - } - if (packets) - { - /* at least on Linux and FreeBSD this contains the number of packets */ - *packets = response.lft_current->sadb_lifetime_allocations; - } - if (time) - { -#ifdef __APPLE__ - /* OS X uses the "last" time of use in usetime */ - *time = response.lft_current->sadb_lifetime_usetime; -#else /* !__APPLE__ */ - /* on Linux, sadb_lifetime_usetime is set to the "first" time of use, - * which is actually correct according to PF_KEY. We have to query - * policies for the last usetime. */ - *time = 0; -#endif /* !__APPLE__ */ - } - - free(out); - return SUCCESS; -} - -METHOD(kernel_ipsec_t, del_sa, status_t, - private_kernel_pfkey_ipsec_t *this, host_t *src, host_t *dst, - u_int32_t spi, u_int8_t protocol, u_int16_t cpi, mark_t mark) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg, *out; - struct sadb_sa *sa; - size_t len; - - /* if IPComp was used, we first delete the additional IPComp SA */ - if (cpi) - { - del_sa(this, src, dst, htonl(ntohs(cpi)), IPPROTO_COMP, 0, mark); - } - - memset(&request, 0, sizeof(request)); - - DBG2(DBG_KNL, "deleting SAD entry with SPI %.8x", ntohl(spi)); - - msg = (struct sadb_msg*)request; - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = SADB_DELETE; - msg->sadb_msg_satype = proto2satype(protocol); - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - - sa = (struct sadb_sa*)PFKEY_EXT_ADD_NEXT(msg); - sa->sadb_sa_exttype = SADB_EXT_SA; - sa->sadb_sa_len = PFKEY_LEN(sizeof(struct sadb_sa)); - sa->sadb_sa_spi = spi; - PFKEY_EXT_ADD(msg, sa); - - /* the Linux Kernel doesn't care for the src address, but other systems do - * (e.g. FreeBSD) - */ - add_addr_ext(msg, src, SADB_EXT_ADDRESS_SRC, 0, 0, FALSE); - add_addr_ext(msg, dst, SADB_EXT_ADDRESS_DST, 0, 0, FALSE); - - if (pfkey_send(this, msg, &out, &len) != SUCCESS) - { - DBG1(DBG_KNL, "unable to delete SAD entry with SPI %.8x", ntohl(spi)); - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "unable to delete SAD entry with SPI %.8x: %s (%d)", - ntohl(spi), strerror(out->sadb_msg_errno), - out->sadb_msg_errno); - free(out); - return FAILED; - } - - DBG2(DBG_KNL, "deleted SAD entry with SPI %.8x", ntohl(spi)); - free(out); - return SUCCESS; -} - -METHOD(kernel_ipsec_t, flush_sas, status_t, - private_kernel_pfkey_ipsec_t *this) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg, *out; - struct { - u_int8_t proto; - char *name; - } protos[] = { - { SADB_SATYPE_AH, "AH" }, - { SADB_SATYPE_ESP, "ESP" }, - { SADB_X_SATYPE_IPCOMP, "IPComp" }, - }; - size_t len; - int i; - - memset(&request, 0, sizeof(request)); - - msg = (struct sadb_msg*)request; - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = SADB_FLUSH; - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - - for (i = 0; i < countof(protos); i++) - { - DBG2(DBG_KNL, "flushing all %s SAD entries", protos[i].name); - - msg->sadb_msg_satype = protos[i].proto; - if (pfkey_send(this, msg, &out, &len) != SUCCESS) - { - DBG1(DBG_KNL, "unable to flush %s SAD entries", protos[i].name); - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "unable to flush %s SAD entries: %s (%d)", - protos[i].name, strerror(out->sadb_msg_errno), - out->sadb_msg_errno); - free(out); - return FAILED; - } - free(out); - } - return SUCCESS; -} - -/** - * Add an explicit exclude route to a routing entry - */ -static void add_exclude_route(private_kernel_pfkey_ipsec_t *this, - route_entry_t *route, host_t *src, host_t *dst) -{ - enumerator_t *enumerator; - exclude_route_t *exclude; - host_t *gtw; - - enumerator = this->excludes->create_enumerator(this->excludes); - while (enumerator->enumerate(enumerator, &exclude)) - { - if (dst->ip_equals(dst, exclude->dst)) - { - route->exclude = exclude; - exclude->refs++; - } - } - enumerator->destroy(enumerator); - - if (!route->exclude) - { - DBG2(DBG_KNL, "installing new exclude route for %H src %H", dst, src); - gtw = hydra->kernel_interface->get_nexthop(hydra->kernel_interface, - dst, -1, NULL); - if (gtw) - { - char *if_name = NULL; - - if (hydra->kernel_interface->get_interface( - hydra->kernel_interface, src, &if_name) && - hydra->kernel_interface->add_route(hydra->kernel_interface, - dst->get_address(dst), - dst->get_family(dst) == AF_INET ? 32 : 128, - gtw, src, if_name) == SUCCESS) - { - INIT(exclude, - .dst = dst->clone(dst), - .src = src->clone(src), - .gtw = gtw->clone(gtw), - .refs = 1, - ); - route->exclude = exclude; - this->excludes->insert_last(this->excludes, exclude); - } - else - { - DBG1(DBG_KNL, "installing exclude route for %H failed", dst); - } - gtw->destroy(gtw); - free(if_name); - } - else - { - DBG1(DBG_KNL, "gateway lookup for for %H failed", dst); - } - } -} - -/** - * Remove an exclude route attached to a routing entry - */ -static void remove_exclude_route(private_kernel_pfkey_ipsec_t *this, - route_entry_t *route) -{ - if (route->exclude) - { - enumerator_t *enumerator; - exclude_route_t *exclude; - bool removed = FALSE; - host_t *dst; - - enumerator = this->excludes->create_enumerator(this->excludes); - while (enumerator->enumerate(enumerator, &exclude)) - { - if (route->exclude == exclude) - { - if (--exclude->refs == 0) - { - this->excludes->remove_at(this->excludes, enumerator); - removed = TRUE; - break; - } - } - } - enumerator->destroy(enumerator); - - if (removed) - { - char *if_name = NULL; - - dst = route->exclude->dst; - DBG2(DBG_KNL, "uninstalling exclude route for %H src %H", - dst, route->exclude->src); - if (hydra->kernel_interface->get_interface( - hydra->kernel_interface, - route->exclude->src, &if_name) && - hydra->kernel_interface->del_route(hydra->kernel_interface, - dst->get_address(dst), - dst->get_family(dst) == AF_INET ? 32 : 128, - route->exclude->gtw, route->exclude->src, - if_name) != SUCCESS) - { - DBG1(DBG_KNL, "uninstalling exclude route for %H failed", dst); - } - exclude_route_destroy(route->exclude); - free(if_name); - } - route->exclude = NULL; - } -} - -/** - * Try to install a route to the given inbound policy - */ -static bool install_route(private_kernel_pfkey_ipsec_t *this, - policy_entry_t *policy, policy_sa_in_t *in) -{ - route_entry_t *route, *old; - host_t *host, *src, *dst; - bool is_virtual; - - if (hydra->kernel_interface->get_address_by_ts(hydra->kernel_interface, - in->dst_ts, &host, &is_virtual) != SUCCESS) - { - return FALSE; - } - - /* switch src/dst, as we handle an IN policy */ - src = in->generic.sa->dst; - dst = in->generic.sa->src; - - INIT(route, - .prefixlen = policy->src.mask, - .src_ip = host, - .dst_net = chunk_clone(policy->src.net->get_address(policy->src.net)), - ); - - if (!dst->is_anyaddr(dst)) - { - route->gateway = hydra->kernel_interface->get_nexthop( - hydra->kernel_interface, dst, -1, src); - - /* if the IP is virtual, we install the route over the interface it has - * been installed on. Otherwise we use the interface we use for IKE, as - * this is required for example on Linux. */ - if (is_virtual) - { - src = route->src_ip; - } - } - else - { /* for shunt policies */ - route->gateway = hydra->kernel_interface->get_nexthop( - hydra->kernel_interface, policy->src.net, - policy->src.mask, route->src_ip); - - /* we don't have a source address, use the address we found */ - src = route->src_ip; - } - - /* get interface for route, using source address */ - if (!hydra->kernel_interface->get_interface(hydra->kernel_interface, - src, &route->if_name)) - { - route_entry_destroy(route); - return FALSE; - } - - if (policy->route) - { - old = policy->route; - - if (route_entry_equals(old, route)) - { /* such a route already exists */ - route_entry_destroy(route); - return TRUE; - } - /* uninstall previously installed route */ - if (hydra->kernel_interface->del_route(hydra->kernel_interface, - old->dst_net, old->prefixlen, old->gateway, - old->src_ip, old->if_name) != SUCCESS) - { - DBG1(DBG_KNL, "error uninstalling route installed with policy " - "%R === %R %N", in->src_ts, in->dst_ts, - policy_dir_names, policy->direction); - } - route_entry_destroy(old); - policy->route = NULL; - } - - /* if remote traffic selector covers the IKE peer, add an exclude route */ - if (hydra->kernel_interface->get_features( - hydra->kernel_interface) & KERNEL_REQUIRE_EXCLUDE_ROUTE) - { - if (in->src_ts->is_host(in->src_ts, dst)) - { - DBG1(DBG_KNL, "can't install route for %R === %R %N, conflicts " - "with IKE traffic", in->src_ts, in->dst_ts, policy_dir_names, - policy->direction); - route_entry_destroy(route); - return FALSE; - } - if (in->src_ts->includes(in->src_ts, dst)) - { - add_exclude_route(this, route, in->generic.sa->dst, dst); - } - } - - DBG2(DBG_KNL, "installing route: %R via %H src %H dev %s", - in->src_ts, route->gateway, route->src_ip, route->if_name); - - switch (hydra->kernel_interface->add_route(hydra->kernel_interface, - route->dst_net, route->prefixlen, route->gateway, - route->src_ip, route->if_name)) - { - case ALREADY_DONE: - /* route exists, do not uninstall */ - remove_exclude_route(this, route); - route_entry_destroy(route); - return TRUE; - case SUCCESS: - /* cache the installed route */ - policy->route = route; - return TRUE; - default: - DBG1(DBG_KNL, "installing route failed: %R via %H src %H dev %s", - in->src_ts, route->gateway, route->src_ip, route->if_name); - remove_exclude_route(this, route); - route_entry_destroy(route); - return FALSE; - } -} - -/** - * Add or update a policy in the kernel. - * - * Note: The mutex has to be locked when entering this function. - */ -static status_t add_policy_internal(private_kernel_pfkey_ipsec_t *this, - policy_entry_t *policy, policy_sa_t *mapping, bool update) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg, *out; - struct sadb_x_policy *pol; - struct sadb_x_ipsecrequest *req; - ipsec_sa_t *ipsec = mapping->sa; - pfkey_msg_t response; - size_t len; - ipsec_mode_t proto_mode; - status_t status; - - memset(&request, 0, sizeof(request)); - - msg = (struct sadb_msg*)request; - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = update ? SADB_X_SPDUPDATE : SADB_X_SPDADD; - msg->sadb_msg_satype = 0; - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - - pol = (struct sadb_x_policy*)PFKEY_EXT_ADD_NEXT(msg); - pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; - pol->sadb_x_policy_len = PFKEY_LEN(sizeof(struct sadb_x_policy)); - pol->sadb_x_policy_id = 0; - pol->sadb_x_policy_dir = dir2kernel(policy->direction); - pol->sadb_x_policy_type = type2kernel(mapping->type); -#ifdef HAVE_STRUCT_SADB_X_POLICY_SADB_X_POLICY_PRIORITY - pol->sadb_x_policy_priority = mapping->priority; -#endif - - /* one or more sadb_x_ipsecrequest extensions are added to the - * sadb_x_policy extension */ - proto_mode = ipsec->cfg.mode; - - req = (struct sadb_x_ipsecrequest*)(pol + 1); - - if (ipsec->cfg.ipcomp.transform != IPCOMP_NONE) - { - req->sadb_x_ipsecrequest_proto = IPPROTO_COMP; - - /* !!! the length here MUST be in octets instead of 64 bit words */ - req->sadb_x_ipsecrequest_len = sizeof(struct sadb_x_ipsecrequest); - req->sadb_x_ipsecrequest_mode = mode2kernel(ipsec->cfg.mode); - req->sadb_x_ipsecrequest_reqid = ipsec->cfg.reqid; - req->sadb_x_ipsecrequest_level = (policy->direction == POLICY_OUT) ? - IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_USE; - if (ipsec->cfg.mode == MODE_TUNNEL) - { - len = hostcpy(req + 1, ipsec->src, FALSE); - req->sadb_x_ipsecrequest_len += len; - len = hostcpy((char*)(req + 1) + len, ipsec->dst, FALSE); - req->sadb_x_ipsecrequest_len += len; - /* use transport mode for other SAs */ - proto_mode = MODE_TRANSPORT; - } - - pol->sadb_x_policy_len += PFKEY_LEN(req->sadb_x_ipsecrequest_len); - req = (struct sadb_x_ipsecrequest*)((char*)(req) + - req->sadb_x_ipsecrequest_len); - } - - req->sadb_x_ipsecrequest_proto = ipsec->cfg.esp.use ? IPPROTO_ESP - : IPPROTO_AH; - /* !!! the length here MUST be in octets instead of 64 bit words */ - req->sadb_x_ipsecrequest_len = sizeof(struct sadb_x_ipsecrequest); - req->sadb_x_ipsecrequest_mode = mode2kernel(proto_mode); - req->sadb_x_ipsecrequest_reqid = ipsec->cfg.reqid; - req->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE; - if (proto_mode == MODE_TUNNEL) - { - len = hostcpy(req + 1, ipsec->src, FALSE); - req->sadb_x_ipsecrequest_len += len; - len = hostcpy((char*)(req + 1) + len, ipsec->dst, FALSE); - req->sadb_x_ipsecrequest_len += len; - } - - pol->sadb_x_policy_len += PFKEY_LEN(req->sadb_x_ipsecrequest_len); - PFKEY_EXT_ADD(msg, pol); - - add_addr_ext(msg, policy->src.net, SADB_EXT_ADDRESS_SRC, policy->src.proto, - policy->src.mask, TRUE); - add_addr_ext(msg, policy->dst.net, SADB_EXT_ADDRESS_DST, policy->dst.proto, - policy->dst.mask, TRUE); - -#ifdef __FreeBSD__ - { /* on FreeBSD a lifetime has to be defined to be able to later query - * the current use time. */ - struct sadb_lifetime *lft; - lft = (struct sadb_lifetime*)PFKEY_EXT_ADD_NEXT(msg); - lft->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; - lft->sadb_lifetime_len = PFKEY_LEN(sizeof(struct sadb_lifetime)); - lft->sadb_lifetime_addtime = LONG_MAX; - PFKEY_EXT_ADD(msg, lft); - } -#endif - - this->mutex->unlock(this->mutex); - - status = pfkey_send(this, msg, &out, &len); - if (status == SUCCESS && !update && out->sadb_msg_errno == EEXIST) - { - DBG1(DBG_KNL, "policy already exists, try to update it"); - free(out); - msg->sadb_msg_type = SADB_X_SPDUPDATE; - status = pfkey_send(this, msg, &out, &len); - } - if (status != SUCCESS) - { - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "unable to %s policy: %s (%d)", - update ? "update" : "add", strerror(out->sadb_msg_errno), - out->sadb_msg_errno); - free(out); - return FAILED; - } - else if (parse_pfkey_message(out, &response) != SUCCESS) - { - DBG1(DBG_KNL, "unable to %s policy: parsing response from kernel " - "failed", update ? "update" : "add"); - free(out); - return FAILED; - } - - /* we try to find the policy again and update the kernel index */ - this->mutex->lock(this->mutex); - if (this->policies->find_first(this->policies, NULL, - (void**)&policy) != SUCCESS) - { - DBG2(DBG_KNL, "unable to update index, the policy is already gone, " - "ignoring"); - this->mutex->unlock(this->mutex); - free(out); - return SUCCESS; - } - policy->index = response.x_policy->sadb_x_policy_id; - free(out); - - /* install a route, if: - * - this is an inbound policy (to just get one for each child) - * - we are in tunnel mode or install a bypass policy - * - routing is not disabled via strongswan.conf - */ - if (policy->direction == POLICY_IN && this->install_routes && - (mapping->type != POLICY_IPSEC || ipsec->cfg.mode != MODE_TRANSPORT)) - { - install_route(this, policy, (policy_sa_in_t*)mapping); - } - this->mutex->unlock(this->mutex); - return SUCCESS; -} - -METHOD(kernel_ipsec_t, add_policy, status_t, - private_kernel_pfkey_ipsec_t *this, host_t *src, host_t *dst, - traffic_selector_t *src_ts, traffic_selector_t *dst_ts, - policy_dir_t direction, policy_type_t type, ipsec_sa_cfg_t *sa, - mark_t mark, policy_priority_t priority) -{ - policy_entry_t *policy, *found = NULL; - policy_sa_t *assigned_sa, *current_sa; - enumerator_t *enumerator; - bool update = TRUE; - - if (dir2kernel(direction) == IPSEC_DIR_INVALID) - { /* FWD policies are not supported on all platforms */ - return SUCCESS; - } - - /* create a policy */ - policy = create_policy_entry(src_ts, dst_ts, direction); - - /* find a matching policy */ - this->mutex->lock(this->mutex); - if (this->policies->find_first(this->policies, - (linked_list_match_t)policy_entry_equals, - (void**)&found, policy) == SUCCESS) - { /* use existing policy */ - DBG2(DBG_KNL, "policy %R === %R %N already exists, increasing " - "refcount", src_ts, dst_ts, policy_dir_names, direction); - policy_entry_destroy(policy, this); - policy = found; - } - else - { /* use the new one, if we have no such policy */ - this->policies->insert_first(this->policies, policy); - policy->used_by = linked_list_create(); - } - - /* cache the assigned IPsec SA */ - assigned_sa = policy_sa_create(this, direction, type, src, dst, src_ts, - dst_ts, sa); - assigned_sa->priority = get_priority(policy, priority); - - /* insert the SA according to its priority */ - enumerator = policy->used_by->create_enumerator(policy->used_by); - while (enumerator->enumerate(enumerator, (void**)¤t_sa)) - { - if (current_sa->priority >= assigned_sa->priority) - { - break; - } - update = FALSE; - } - policy->used_by->insert_before(policy->used_by, enumerator, assigned_sa); - enumerator->destroy(enumerator); - - if (!update) - { /* we don't update the policy if the priority is lower than that of the - * currently installed one */ - this->mutex->unlock(this->mutex); - return SUCCESS; - } - - DBG2(DBG_KNL, "%s policy %R === %R %N", - found ? "updating" : "adding", src_ts, dst_ts, - policy_dir_names, direction); - - if (add_policy_internal(this, policy, assigned_sa, found) != SUCCESS) - { - DBG1(DBG_KNL, "unable to %s policy %R === %R %N", - found ? "update" : "add", src_ts, dst_ts, - policy_dir_names, direction); - return FAILED; - } - return SUCCESS; -} - -METHOD(kernel_ipsec_t, query_policy, status_t, - private_kernel_pfkey_ipsec_t *this, traffic_selector_t *src_ts, - traffic_selector_t *dst_ts, policy_dir_t direction, mark_t mark, - time_t *use_time) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg, *out; - struct sadb_x_policy *pol; - policy_entry_t *policy, *found = NULL; - pfkey_msg_t response; - size_t len; - - if (dir2kernel(direction) == IPSEC_DIR_INVALID) - { /* FWD policies are not supported on all platforms */ - return NOT_FOUND; - } - - DBG2(DBG_KNL, "querying policy %R === %R %N", src_ts, dst_ts, - policy_dir_names, direction); - - /* create a policy */ - policy = create_policy_entry(src_ts, dst_ts, direction); - - /* find a matching policy */ - this->mutex->lock(this->mutex); - if (this->policies->find_first(this->policies, - (linked_list_match_t)policy_entry_equals, - (void**)&found, policy) != SUCCESS) - { - DBG1(DBG_KNL, "querying policy %R === %R %N failed, not found", src_ts, - dst_ts, policy_dir_names, direction); - policy_entry_destroy(policy, this); - this->mutex->unlock(this->mutex); - return NOT_FOUND; - } - policy_entry_destroy(policy, this); - policy = found; - - memset(&request, 0, sizeof(request)); - - msg = (struct sadb_msg*)request; - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = SADB_X_SPDGET; - msg->sadb_msg_satype = 0; - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - - pol = (struct sadb_x_policy*)PFKEY_EXT_ADD_NEXT(msg); - pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; - pol->sadb_x_policy_id = policy->index; - pol->sadb_x_policy_len = PFKEY_LEN(sizeof(struct sadb_x_policy)); - pol->sadb_x_policy_dir = dir2kernel(direction); - pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; - PFKEY_EXT_ADD(msg, pol); - - add_addr_ext(msg, policy->src.net, SADB_EXT_ADDRESS_SRC, policy->src.proto, - policy->src.mask, TRUE); - add_addr_ext(msg, policy->dst.net, SADB_EXT_ADDRESS_DST, policy->dst.proto, - policy->dst.mask, TRUE); - - this->mutex->unlock(this->mutex); - - if (pfkey_send(this, msg, &out, &len) != SUCCESS) - { - DBG1(DBG_KNL, "unable to query policy %R === %R %N", src_ts, dst_ts, - policy_dir_names, direction); - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "unable to query policy %R === %R %N: %s (%d)", src_ts, - dst_ts, policy_dir_names, direction, - strerror(out->sadb_msg_errno), out->sadb_msg_errno); - free(out); - return FAILED; - } - else if (parse_pfkey_message(out, &response) != SUCCESS) - { - DBG1(DBG_KNL, "unable to query policy %R === %R %N: parsing response " - "from kernel failed", src_ts, dst_ts, policy_dir_names, - direction); - free(out); - return FAILED; - } - else if (response.lft_current == NULL) - { - DBG2(DBG_KNL, "unable to query policy %R === %R %N: kernel reports no " - "use time", src_ts, dst_ts, policy_dir_names, direction); - free(out); - return FAILED; - } - - /* we need the monotonic time, but the kernel returns system time. */ - if (response.lft_current->sadb_lifetime_usetime) - { - *use_time = time_monotonic(NULL) - - (time(NULL) - response.lft_current->sadb_lifetime_usetime); - } - else - { - *use_time = 0; - } - free(out); - return SUCCESS; -} - -METHOD(kernel_ipsec_t, del_policy, status_t, - private_kernel_pfkey_ipsec_t *this, host_t *src, host_t *dst, - traffic_selector_t *src_ts, traffic_selector_t *dst_ts, - policy_dir_t direction, policy_type_t type, ipsec_sa_cfg_t *sa, - mark_t mark, policy_priority_t prio) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg, *out; - struct sadb_x_policy *pol; - policy_entry_t *policy, *found = NULL; - policy_sa_t *mapping, *to_remove = NULL; - enumerator_t *enumerator; - bool first = TRUE, is_installed = TRUE; - u_int32_t priority; - size_t len; - ipsec_sa_t assigned_sa = { - .src = src, - .dst = dst, - .cfg = *sa, - }; - - if (dir2kernel(direction) == IPSEC_DIR_INVALID) - { /* FWD policies are not supported on all platforms */ - return SUCCESS; - } - - DBG2(DBG_KNL, "deleting policy %R === %R %N", src_ts, dst_ts, - policy_dir_names, direction); - - /* create a policy */ - policy = create_policy_entry(src_ts, dst_ts, direction); - - /* find a matching policy */ - this->mutex->lock(this->mutex); - if (this->policies->find_first(this->policies, - (linked_list_match_t)policy_entry_equals, - (void**)&found, policy) != SUCCESS) - { - DBG1(DBG_KNL, "deleting policy %R === %R %N failed, not found", src_ts, - dst_ts, policy_dir_names, direction); - policy_entry_destroy(policy, this); - this->mutex->unlock(this->mutex); - return NOT_FOUND; - } - policy_entry_destroy(policy, this); - policy = found; - - /* remove mapping to SA by reqid and priority, if multiple match, which - * could happen when rekeying due to an address change, remove the oldest */ - priority = get_priority(policy, prio); - enumerator = policy->used_by->create_enumerator(policy->used_by); - while (enumerator->enumerate(enumerator, (void**)&mapping)) - { - if (priority == mapping->priority && - ipsec_sa_equals(mapping->sa, &assigned_sa)) - { - to_remove = mapping; - is_installed = first; - } - else if (priority < mapping->priority) - { - break; - } - first = FALSE; - } - enumerator->destroy(enumerator); - if (!to_remove) - { /* sanity check */ - this->mutex->unlock(this->mutex); - return SUCCESS; - } - policy->used_by->remove(policy->used_by, to_remove, NULL); - mapping = to_remove; - - if (policy->used_by->get_count(policy->used_by) > 0) - { /* policy is used by more SAs, keep in kernel */ - DBG2(DBG_KNL, "policy still used by another CHILD_SA, not removed"); - policy_sa_destroy(mapping, &direction, this); - - if (!is_installed) - { /* no need to update as the policy was not installed for this SA */ - this->mutex->unlock(this->mutex); - return SUCCESS; - } - - DBG2(DBG_KNL, "updating policy %R === %R %N", src_ts, dst_ts, - policy_dir_names, direction); - policy->used_by->get_first(policy->used_by, (void**)&mapping); - if (add_policy_internal(this, policy, mapping, TRUE) != SUCCESS) - { - DBG1(DBG_KNL, "unable to update policy %R === %R %N", - src_ts, dst_ts, policy_dir_names, direction); - return FAILED; - } - return SUCCESS; - } - - memset(&request, 0, sizeof(request)); - - msg = (struct sadb_msg*)request; - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = SADB_X_SPDDELETE; - msg->sadb_msg_satype = 0; - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - - pol = (struct sadb_x_policy*)PFKEY_EXT_ADD_NEXT(msg); - pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; - pol->sadb_x_policy_len = PFKEY_LEN(sizeof(struct sadb_x_policy)); - pol->sadb_x_policy_dir = dir2kernel(direction); - pol->sadb_x_policy_type = type2kernel(mapping->type); - PFKEY_EXT_ADD(msg, pol); - - add_addr_ext(msg, policy->src.net, SADB_EXT_ADDRESS_SRC, policy->src.proto, - policy->src.mask, TRUE); - add_addr_ext(msg, policy->dst.net, SADB_EXT_ADDRESS_DST, policy->dst.proto, - policy->dst.mask, TRUE); - - if (policy->route) - { - route_entry_t *route = policy->route; - if (hydra->kernel_interface->del_route(hydra->kernel_interface, - route->dst_net, route->prefixlen, route->gateway, - route->src_ip, route->if_name) != SUCCESS) - { - DBG1(DBG_KNL, "error uninstalling route installed with " - "policy %R === %R %N", src_ts, dst_ts, - policy_dir_names, direction); - } - remove_exclude_route(this, route); - } - - this->policies->remove(this->policies, found, NULL); - policy_sa_destroy(mapping, &direction, this); - policy_entry_destroy(policy, this); - this->mutex->unlock(this->mutex); - - if (pfkey_send(this, msg, &out, &len) != SUCCESS) - { - DBG1(DBG_KNL, "unable to delete policy %R === %R %N", src_ts, dst_ts, - policy_dir_names, direction); - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "unable to delete policy %R === %R %N: %s (%d)", src_ts, - dst_ts, policy_dir_names, direction, - strerror(out->sadb_msg_errno), out->sadb_msg_errno); - free(out); - return FAILED; - } - free(out); - return SUCCESS; -} - -METHOD(kernel_ipsec_t, flush_policies, status_t, - private_kernel_pfkey_ipsec_t *this) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg, *out; - size_t len; - - memset(&request, 0, sizeof(request)); - - DBG2(DBG_KNL, "flushing all policies from SPD"); - - msg = (struct sadb_msg*)request; - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = SADB_X_SPDFLUSH; - msg->sadb_msg_satype = SADB_SATYPE_UNSPEC; - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - - if (pfkey_send(this, msg, &out, &len) != SUCCESS) - { - DBG1(DBG_KNL, "unable to flush SPD entries"); - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "unable to flush SPD entries: %s (%d)", - strerror(out->sadb_msg_errno), out->sadb_msg_errno); - free(out); - return FAILED; - } - free(out); - return SUCCESS; -} - -/** - * Register a socket for ACQUIRE/EXPIRE messages - */ -static status_t register_pfkey_socket(private_kernel_pfkey_ipsec_t *this, - u_int8_t satype) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg, *out; - size_t len; - - memset(&request, 0, sizeof(request)); - - msg = (struct sadb_msg*)request; - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = SADB_REGISTER; - msg->sadb_msg_satype = satype; - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - - if (pfkey_send_socket(this, this->socket_events, msg, &out, &len) != SUCCESS) - { - DBG1(DBG_KNL, "unable to register PF_KEY socket"); - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "unable to register PF_KEY socket: %s (%d)", - strerror(out->sadb_msg_errno), out->sadb_msg_errno); - free(out); - return FAILED; - } - free(out); - return SUCCESS; -} - -METHOD(kernel_ipsec_t, bypass_socket, bool, - private_kernel_pfkey_ipsec_t *this, int fd, int family) -{ - struct sadb_x_policy policy; - u_int sol, ipsec_policy; - - switch (family) - { - case AF_INET: - { - sol = SOL_IP; - ipsec_policy = IP_IPSEC_POLICY; - break; - } - case AF_INET6: - { - sol = SOL_IPV6; - ipsec_policy = IPV6_IPSEC_POLICY; - break; - } - default: - return FALSE; - } - - memset(&policy, 0, sizeof(policy)); - policy.sadb_x_policy_len = sizeof(policy) / sizeof(u_int64_t); - policy.sadb_x_policy_exttype = SADB_X_EXT_POLICY; - policy.sadb_x_policy_type = IPSEC_POLICY_BYPASS; - - policy.sadb_x_policy_dir = IPSEC_DIR_OUTBOUND; - if (setsockopt(fd, sol, ipsec_policy, &policy, sizeof(policy)) < 0) - { - DBG1(DBG_KNL, "unable to set IPSEC_POLICY on socket: %s", - strerror(errno)); - return FALSE; - } - policy.sadb_x_policy_dir = IPSEC_DIR_INBOUND; - if (setsockopt(fd, sol, ipsec_policy, &policy, sizeof(policy)) < 0) - { - DBG1(DBG_KNL, "unable to set IPSEC_POLICY on socket: %s", - strerror(errno)); - return FALSE; - } - return TRUE; -} - -METHOD(kernel_ipsec_t, enable_udp_decap, bool, - private_kernel_pfkey_ipsec_t *this, int fd, int family, u_int16_t port) -{ -#ifndef __APPLE__ - int type = UDP_ENCAP_ESPINUDP; - - if (setsockopt(fd, SOL_UDP, UDP_ENCAP, &type, sizeof(type)) < 0) - { - DBG1(DBG_KNL, "unable to set UDP_ENCAP: %s", strerror(errno)); - return FALSE; - } -#else /* __APPLE__ */ - int intport = port; - - if (sysctlbyname("net.inet.ipsec.esp_port", NULL, NULL, &intport, - sizeof(intport)) != 0) - { - DBG1(DBG_KNL, "could not set net.inet.ipsec.esp_port to %d: %s", - port, strerror(errno)); - return FALSE; - } -#endif /* __APPLE__ */ - - return TRUE; -} - -METHOD(kernel_ipsec_t, destroy, void, - private_kernel_pfkey_ipsec_t *this) -{ - if (this->socket > 0) - { - close(this->socket); - } - if (this->socket_events > 0) - { - lib->watcher->remove(lib->watcher, this->socket_events); - close(this->socket_events); - } - this->policies->invoke_function(this->policies, - (linked_list_invoke_t)policy_entry_destroy, - this); - this->policies->destroy(this->policies); - this->excludes->destroy(this->excludes); - this->sas->destroy(this->sas); - this->mutex->destroy(this->mutex); - this->mutex_pfkey->destroy(this->mutex_pfkey); - free(this); -} - -/* - * Described in header. - */ -kernel_pfkey_ipsec_t *kernel_pfkey_ipsec_create() -{ - private_kernel_pfkey_ipsec_t *this; - bool register_for_events = TRUE; - int rcv_buffer; - - INIT(this, - .public = { - .interface = { - .get_spi = _get_spi, - .get_cpi = _get_cpi, - .add_sa = _add_sa, - .update_sa = _update_sa, - .query_sa = _query_sa, - .del_sa = _del_sa, - .flush_sas = _flush_sas, - .add_policy = _add_policy, - .query_policy = _query_policy, - .del_policy = _del_policy, - .flush_policies = _flush_policies, - .bypass_socket = _bypass_socket, - .enable_udp_decap = _enable_udp_decap, - .destroy = _destroy, - }, - }, - .policies = linked_list_create(), - .excludes = linked_list_create(), - .sas = hashtable_create((hashtable_hash_t)ipsec_sa_hash, - (hashtable_equals_t)ipsec_sa_equals, 32), - .mutex = mutex_create(MUTEX_TYPE_DEFAULT), - .mutex_pfkey = mutex_create(MUTEX_TYPE_DEFAULT), - .install_routes = lib->settings->get_bool(lib->settings, - "%s.install_routes", TRUE, - lib->ns), - ); - - if (streq(lib->ns, "starter")) - { /* starter has no threads, so we do not register for kernel events */ - register_for_events = FALSE; - } - - /* create a PF_KEY socket to communicate with the kernel */ - this->socket = socket(PF_KEY, SOCK_RAW, PF_KEY_V2); - if (this->socket <= 0) - { - DBG1(DBG_KNL, "unable to create PF_KEY socket"); - destroy(this); - return NULL; - } - - if (register_for_events) - { - /* create a PF_KEY socket for ACQUIRE & EXPIRE */ - this->socket_events = socket(PF_KEY, SOCK_RAW, PF_KEY_V2); - if (this->socket_events <= 0) - { - DBG1(DBG_KNL, "unable to create PF_KEY event socket"); - destroy(this); - return NULL; - } - - rcv_buffer = lib->settings->get_int(lib->settings, - "%s.plugins.kernel-pfkey.events_buffer_size", 0, lib->ns); - if (rcv_buffer > 0) - { - if (setsockopt(this->socket_events, SOL_SOCKET, SO_RCVBUF, - &rcv_buffer, sizeof(rcv_buffer)) == -1) - { - DBG1(DBG_KNL, "unable to set receive buffer size on PF_KEY " - "event socket: %s", strerror(errno)); - } - } - - /* register the event socket */ - if (register_pfkey_socket(this, SADB_SATYPE_ESP) != SUCCESS || - register_pfkey_socket(this, SADB_SATYPE_AH) != SUCCESS) - { - DBG1(DBG_KNL, "unable to register PF_KEY event socket"); - destroy(this); - return NULL; - } - - lib->watcher->add(lib->watcher, this->socket_events, WATCHER_READ, - (watcher_cb_t)receive_events, this); - } - - return &this->public; -} diff --git a/src/libhydra/plugins/kernel_pfkey/kernel_pfkey_ipsec.h b/src/libhydra/plugins/kernel_pfkey/kernel_pfkey_ipsec.h deleted file mode 100644 index 649f93733..000000000 --- a/src/libhydra/plugins/kernel_pfkey/kernel_pfkey_ipsec.h +++ /dev/null @@ -1,46 +0,0 @@ -/* - * Copyright (C) 2008 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -/** - * @defgroup kernel_pfkey_ipsec_i kernel_pfkey_ipsec - * @{ @ingroup kernel_pfkey - */ - -#ifndef KERNEL_PFKEY_IPSEC_H_ -#define KERNEL_PFKEY_IPSEC_H_ - -#include <kernel/kernel_ipsec.h> - -typedef struct kernel_pfkey_ipsec_t kernel_pfkey_ipsec_t; - -/** - * Implementation of the kernel ipsec interface using PF_KEY. - */ -struct kernel_pfkey_ipsec_t { - - /** - * Implements kernel_ipsec_t interface - */ - kernel_ipsec_t interface; -}; - -/** - * Create a PF_KEY kernel ipsec interface instance. - * - * @return kernel_pfkey_ipsec_t instance - */ -kernel_pfkey_ipsec_t *kernel_pfkey_ipsec_create(); - -#endif /** KERNEL_PFKEY_IPSEC_H_ @}*/ diff --git a/src/libhydra/plugins/kernel_pfkey/kernel_pfkey_plugin.c b/src/libhydra/plugins/kernel_pfkey/kernel_pfkey_plugin.c deleted file mode 100644 index 61d576547..000000000 --- a/src/libhydra/plugins/kernel_pfkey/kernel_pfkey_plugin.c +++ /dev/null @@ -1,82 +0,0 @@ -/* - * Copyright (C) 2008 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - - -#include "kernel_pfkey_plugin.h" - -#include "kernel_pfkey_ipsec.h" - -#include <hydra.h> - -typedef struct private_kernel_pfkey_plugin_t private_kernel_pfkey_plugin_t; - -/** - * private data of kernel PF_KEY plugin - */ -struct private_kernel_pfkey_plugin_t { - /** - * implements plugin interface - */ - kernel_pfkey_plugin_t public; -}; - -METHOD(plugin_t, get_name, char*, - private_kernel_pfkey_plugin_t *this) -{ - return "kernel-pfkey"; -} - -METHOD(plugin_t, get_features, int, - private_kernel_pfkey_plugin_t *this, plugin_feature_t *features[]) -{ - static plugin_feature_t f[] = { - PLUGIN_CALLBACK(kernel_ipsec_register, kernel_pfkey_ipsec_create), - PLUGIN_PROVIDE(CUSTOM, "kernel-ipsec"), - }; - *features = f; - return countof(f); -} - -METHOD(plugin_t, destroy, void, - private_kernel_pfkey_plugin_t *this) -{ - free(this); -} - -/* - * see header file - */ -plugin_t *kernel_pfkey_plugin_create() -{ - private_kernel_pfkey_plugin_t *this; - - if (!lib->caps->check(lib->caps, CAP_NET_ADMIN)) - { /* required to open PF_KEY sockets */ - DBG1(DBG_KNL, "kernel-pfkey plugin requires CAP_NET_ADMIN capability"); - return NULL; - } - - INIT(this, - .public = { - .plugin = { - .get_name = _get_name, - .get_features = _get_features, - .destroy = _destroy, - }, - }, - ); - - return &this->public.plugin; -} diff --git a/src/libhydra/plugins/kernel_pfkey/kernel_pfkey_plugin.h b/src/libhydra/plugins/kernel_pfkey/kernel_pfkey_plugin.h deleted file mode 100644 index 51db4d8d3..000000000 --- a/src/libhydra/plugins/kernel_pfkey/kernel_pfkey_plugin.h +++ /dev/null @@ -1,42 +0,0 @@ -/* - * Copyright (C) 2008 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -/** - * @defgroup kernel_pfkey kernel_pfkey - * @ingroup hplugins - * - * @defgroup kernel_pfkey_plugin kernel_pfkey_plugin - * @{ @ingroup kernel_pfkey - */ - -#ifndef KERNEL_PFKEY_PLUGIN_H_ -#define KERNEL_PFKEY_PLUGIN_H_ - -#include <plugins/plugin.h> - -typedef struct kernel_pfkey_plugin_t kernel_pfkey_plugin_t; - -/** - * PF_KEY kernel interface plugin - */ -struct kernel_pfkey_plugin_t { - - /** - * implements plugin interface - */ - plugin_t plugin; -}; - -#endif /** KERNEL_PFKEY_PLUGIN_H_ @}*/ diff --git a/src/libhydra/plugins/kernel_pfroute/Makefile.am b/src/libhydra/plugins/kernel_pfroute/Makefile.am deleted file mode 100644 index 5129c02f6..000000000 --- a/src/libhydra/plugins/kernel_pfroute/Makefile.am +++ /dev/null @@ -1,19 +0,0 @@ -AM_CPPFLAGS = \ - -I${linux_headers} \ - -I$(top_srcdir)/src/libstrongswan \ - -I$(top_srcdir)/src/libhydra - -AM_CFLAGS = \ - $(PLUGIN_CFLAGS) - -if MONOLITHIC -noinst_LTLIBRARIES = libstrongswan-kernel-pfroute.la -else -plugin_LTLIBRARIES = libstrongswan-kernel-pfroute.la -endif - -libstrongswan_kernel_pfroute_la_SOURCES = \ - kernel_pfroute_plugin.h kernel_pfroute_plugin.c \ - kernel_pfroute_net.h kernel_pfroute_net.c - -libstrongswan_kernel_pfroute_la_LDFLAGS = -module -avoid-version diff --git a/src/libhydra/plugins/kernel_pfroute/Makefile.in b/src/libhydra/plugins/kernel_pfroute/Makefile.in deleted file mode 100644 index 9f676d21d..000000000 --- a/src/libhydra/plugins/kernel_pfroute/Makefile.in +++ /dev/null @@ -1,780 +0,0 @@ -# Makefile.in generated by automake 1.14.1 from Makefile.am. -# @configure_input@ - -# Copyright (C) 1994-2013 Free Software Foundation, Inc. - -# This Makefile.in is free software; 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uninstall-pluginLTLIBRARIES - - -# Tell versions [3.59,3.63) of GNU make to not export all variables. -# Otherwise a system limit (for SysV at least) may be exceeded. -.NOEXPORT: diff --git a/src/libhydra/plugins/kernel_pfroute/kernel_pfroute_net.c b/src/libhydra/plugins/kernel_pfroute/kernel_pfroute_net.c deleted file mode 100644 index df80c29b8..000000000 --- a/src/libhydra/plugins/kernel_pfroute/kernel_pfroute_net.c +++ /dev/null @@ -1,1903 +0,0 @@ -/* - * Copyright (C) 2009-2013 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -#include <sys/types.h> -#include <sys/socket.h> -#include <net/if.h> -#include <net/if_dl.h> -#include <ifaddrs.h> -#include <net/route.h> -#include <unistd.h> -#include <errno.h> - -#include "kernel_pfroute_net.h" - -#include <hydra.h> -#include <utils/debug.h> -#include <networking/host.h> -#include <networking/tun_device.h> -#include <threading/thread.h> -#include <threading/mutex.h> -#include <threading/condvar.h> -#include <threading/rwlock.h> -#include <threading/spinlock.h> -#include <collections/hashtable.h> -#include <collections/linked_list.h> -#include <processing/jobs/callback_job.h> - -#ifndef HAVE_STRUCT_SOCKADDR_SA_LEN -#error Cannot compile this plugin on systems where 'struct sockaddr' has no sa_len member. -#endif - -/** properly align sockaddrs */ -#ifdef __APPLE__ -/* Apple always uses 4 bytes */ -#define SA_ALIGN 4 -#else -/* while on other platforms like FreeBSD it depends on the architecture */ -#define SA_ALIGN sizeof(long) -#endif -#define SA_LEN(len) ((len) > 0 ? (((len)+SA_ALIGN-1) & ~(SA_ALIGN-1)) : SA_ALIGN) - -/** delay before firing roam events (ms) */ -#define ROAM_DELAY 100 - -/** delay before reinstalling routes (ms) */ -#define ROUTE_DELAY 100 - -typedef struct addr_entry_t addr_entry_t; - -/** - * IP address in an inface_entry_t - */ -struct addr_entry_t { - - /** The ip address */ - host_t *ip; - - /** virtual IP managed by us */ - bool virtual; -}; - -/** - * destroy a addr_entry_t object - */ -static void addr_entry_destroy(addr_entry_t *this) -{ - this->ip->destroy(this->ip); - free(this); -} - -typedef struct iface_entry_t iface_entry_t; - -/** - * A network interface on this system, containing addr_entry_t's - */ -struct iface_entry_t { - - /** interface index */ - int ifindex; - - /** name of the interface */ - char ifname[IFNAMSIZ]; - - /** interface flags, as in netdevice(7) SIOCGIFFLAGS */ - u_int flags; - - /** list of addresses as host_t */ - linked_list_t *addrs; - - /** TRUE if usable by config */ - bool usable; -}; - -/** - * destroy an interface entry - */ -static void iface_entry_destroy(iface_entry_t *this) -{ - this->addrs->destroy_function(this->addrs, (void*)addr_entry_destroy); - free(this); -} - -/** - * check if an interface is up - */ -static inline bool iface_entry_up(iface_entry_t *iface) -{ - return (iface->flags & IFF_UP) == IFF_UP; -} - -/** - * check if an interface is up and usable - */ -static inline bool iface_entry_up_and_usable(iface_entry_t *iface) -{ - return iface->usable && iface_entry_up(iface); -} - -typedef struct addr_map_entry_t addr_map_entry_t; - -/** - * Entry that maps an IP address to an interface entry - */ -struct addr_map_entry_t { - /** The IP address */ - host_t *ip; - - /** The address entry for this IP address */ - addr_entry_t *addr; - - /** The interface this address is installed on */ - iface_entry_t *iface; -}; - -/** - * Hash a addr_map_entry_t object, all entries with the same IP address - * are stored in the same bucket - */ -static u_int addr_map_entry_hash(addr_map_entry_t *this) -{ - return chunk_hash(this->ip->get_address(this->ip)); -} - -/** - * Compare two addr_map_entry_t objects, two entries are equal if they are - * installed on the same interface - */ -static bool addr_map_entry_equals(addr_map_entry_t *a, addr_map_entry_t *b) -{ - return a->iface->ifindex == b->iface->ifindex && - a->ip->ip_equals(a->ip, b->ip); -} - -/** - * Used with get_match this finds an address entry if it is installed on - * an up and usable interface - */ -static bool addr_map_entry_match_up_and_usable(addr_map_entry_t *a, - addr_map_entry_t *b) -{ - return !b->addr->virtual && iface_entry_up_and_usable(b->iface) && - a->ip->ip_equals(a->ip, b->ip); -} - -/** - * Used with get_match this finds an address entry if it is installed as virtual - * IP address - */ -static bool addr_map_entry_match_virtual(addr_map_entry_t *a, addr_map_entry_t *b) -{ - return b->addr->virtual && a->ip->ip_equals(a->ip, b->ip); -} - -/** - * Used with get_match this finds an address entry if it is installed on - * any active local interface - */ -static bool addr_map_entry_match_up(addr_map_entry_t *a, addr_map_entry_t *b) -{ - return !b->addr->virtual && iface_entry_up(b->iface) && - a->ip->ip_equals(a->ip, b->ip); -} - -typedef struct route_entry_t route_entry_t; - -/** - * Installed routing entry - */ -struct route_entry_t { - /** Name of the interface the route is bound to */ - char *if_name; - - /** Gateway for this route */ - host_t *gateway; - - /** Destination net */ - chunk_t dst_net; - - /** Destination net prefixlen */ - u_int8_t prefixlen; -}; - -/** - * Clone a route_entry_t object. - */ -static route_entry_t *route_entry_clone(route_entry_t *this) -{ - route_entry_t *route; - - INIT(route, - .if_name = strdup(this->if_name), - .gateway = this->gateway ? this->gateway->clone(this->gateway) : NULL, - .dst_net = chunk_clone(this->dst_net), - .prefixlen = this->prefixlen, - ); - return route; -} - -/** - * Destroy a route_entry_t object - */ -static void route_entry_destroy(route_entry_t *this) -{ - free(this->if_name); - DESTROY_IF(this->gateway); - chunk_free(&this->dst_net); - free(this); -} - -/** - * Hash a route_entry_t object - */ -static u_int route_entry_hash(route_entry_t *this) -{ - return chunk_hash_inc(chunk_from_thing(this->prefixlen), - chunk_hash(this->dst_net)); -} - -/** - * Compare two route_entry_t objects - */ -static bool route_entry_equals(route_entry_t *a, route_entry_t *b) -{ - if (a->if_name && b->if_name && streq(a->if_name, b->if_name) && - chunk_equals(a->dst_net, b->dst_net) && a->prefixlen == b->prefixlen) - { - return (!a->gateway && !b->gateway) || (a->gateway && b->gateway && - a->gateway->ip_equals(a->gateway, b->gateway)); - } - return FALSE; -} - -typedef struct net_change_t net_change_t; - -/** - * Queued network changes - */ -struct net_change_t { - /** Name of the interface that got activated (or an IP appeared on) */ - char *if_name; -}; - -/** - * Destroy a net_change_t object - */ -static void net_change_destroy(net_change_t *this) -{ - free(this->if_name); - free(this); -} - -/** - * Hash a net_change_t object - */ -static u_int net_change_hash(net_change_t *this) -{ - return chunk_hash(chunk_create(this->if_name, strlen(this->if_name))); -} - -/** - * Compare two net_change_t objects - */ -static bool net_change_equals(net_change_t *a, net_change_t *b) -{ - return streq(a->if_name, b->if_name); -} - -typedef struct private_kernel_pfroute_net_t private_kernel_pfroute_net_t; - -/** - * Private variables and functions of kernel_pfroute class. - */ -struct private_kernel_pfroute_net_t -{ - /** - * Public part of the kernel_pfroute_t object. - */ - kernel_pfroute_net_t public; - - /** - * lock to access lists and maps - */ - rwlock_t *lock; - - /** - * Cached list of interfaces and their addresses (iface_entry_t) - */ - linked_list_t *ifaces; - - /** - * Map for IP addresses to iface_entry_t objects (addr_map_entry_t) - */ - hashtable_t *addrs; - - /** - * List of tun devices we installed for virtual IPs - */ - linked_list_t *tuns; - - /** - * mutex to communicate exclusively with PF_KEY - */ - mutex_t *mutex; - - /** - * condvar to signal if PF_KEY query got a response - */ - condvar_t *condvar; - - /** - * installed routes - */ - hashtable_t *routes; - - /** - * mutex for routes - */ - mutex_t *routes_lock; - - /** - * interface changes which may trigger route reinstallation - */ - hashtable_t *net_changes; - - /** - * mutex for route reinstallation triggers - */ - mutex_t *net_changes_lock; - - /** - * time of last route reinstallation - */ - timeval_t last_route_reinstall; - - /** - * pid to send PF_ROUTE messages with - */ - pid_t pid; - - /** - * PF_ROUTE socket to communicate with the kernel - */ - int socket; - - /** - * sequence number for messages sent to the kernel - */ - int seq; - - /** - * Sequence number a query is waiting for - */ - int waiting_seq; - - /** - * Allocated reply message from kernel - */ - struct rt_msghdr *reply; - - /** - * earliest time of the next roam event - */ - timeval_t next_roam; - - /** - * roam event due to address change - */ - bool roam_address; - - /** - * lock to check and update roam event time - */ - spinlock_t *roam_lock; - - /** - * Time in ms to wait for IP addresses to appear/disappear - */ - int vip_wait; - - /** - * whether to actually install virtual IPs - */ - bool install_virtual_ip; -}; - - -/** - * Forward declaration - */ -static status_t manage_route(private_kernel_pfroute_net_t *this, int op, - chunk_t dst_net, u_int8_t prefixlen, - host_t *gateway, char *if_name); - -/** - * Clear the queued network changes. - */ -static void net_changes_clear(private_kernel_pfroute_net_t *this) -{ - enumerator_t *enumerator; - net_change_t *change; - - enumerator = this->net_changes->create_enumerator(this->net_changes); - while (enumerator->enumerate(enumerator, NULL, (void**)&change)) - { - this->net_changes->remove_at(this->net_changes, enumerator); - net_change_destroy(change); - } - enumerator->destroy(enumerator); -} - -/** - * Act upon queued network changes. - */ -static job_requeue_t reinstall_routes(private_kernel_pfroute_net_t *this) -{ - enumerator_t *enumerator; - route_entry_t *route; - - this->net_changes_lock->lock(this->net_changes_lock); - this->routes_lock->lock(this->routes_lock); - - enumerator = this->routes->create_enumerator(this->routes); - while (enumerator->enumerate(enumerator, NULL, (void**)&route)) - { - net_change_t *change, lookup = { - .if_name = route->if_name, - }; - /* check if a change for the outgoing interface is queued */ - change = this->net_changes->get(this->net_changes, &lookup); - if (change) - { - manage_route(this, RTM_ADD, route->dst_net, route->prefixlen, - route->gateway, route->if_name); - } - } - enumerator->destroy(enumerator); - this->routes_lock->unlock(this->routes_lock); - - net_changes_clear(this); - this->net_changes_lock->unlock(this->net_changes_lock); - return JOB_REQUEUE_NONE; -} - -/** - * Queue route reinstallation caused by network changes for a given interface. - * - * The route reinstallation is delayed for a while and only done once for - * several calls during this delay, in order to avoid doing it too often. - * The interface name is freed. - */ -static void queue_route_reinstall(private_kernel_pfroute_net_t *this, - char *if_name) -{ - net_change_t *update, *found; - timeval_t now; - job_t *job; - - INIT(update, - .if_name = if_name - ); - - this->net_changes_lock->lock(this->net_changes_lock); - found = this->net_changes->put(this->net_changes, update, update); - if (found) - { - net_change_destroy(found); - } - time_monotonic(&now); - if (timercmp(&now, &this->last_route_reinstall, >)) - { - timeval_add_ms(&now, ROUTE_DELAY); - this->last_route_reinstall = now; - - job = (job_t*)callback_job_create((callback_job_cb_t)reinstall_routes, - this, NULL, NULL); - lib->scheduler->schedule_job_ms(lib->scheduler, job, ROUTE_DELAY); - } - this->net_changes_lock->unlock(this->net_changes_lock); -} - -/** - * Add an address map entry - */ -static void addr_map_entry_add(private_kernel_pfroute_net_t *this, - addr_entry_t *addr, iface_entry_t *iface) -{ - addr_map_entry_t *entry; - - INIT(entry, - .ip = addr->ip, - .addr = addr, - .iface = iface, - ); - entry = this->addrs->put(this->addrs, entry, entry); - free(entry); -} - -/** - * Remove an address map entry (the argument order is a bit strange because - * it is also used with linked_list_t.invoke_function) - */ -static void addr_map_entry_remove(addr_entry_t *addr, iface_entry_t *iface, - private_kernel_pfroute_net_t *this) -{ - addr_map_entry_t *entry, lookup = { - .ip = addr->ip, - .addr = addr, - .iface = iface, - }; - - entry = this->addrs->remove(this->addrs, &lookup); - free(entry); -} - -/** - * callback function that raises the delayed roam event - */ -static job_requeue_t roam_event(private_kernel_pfroute_net_t *this) -{ - bool address; - - this->roam_lock->lock(this->roam_lock); - address = this->roam_address; - this->roam_address = FALSE; - this->roam_lock->unlock(this->roam_lock); - hydra->kernel_interface->roam(hydra->kernel_interface, address); - return JOB_REQUEUE_NONE; -} - -/** - * fire a roaming event. we delay it for a bit and fire only one event - * for multiple calls. otherwise we would create too many events. - */ -static void fire_roam_event(private_kernel_pfroute_net_t *this, bool address) -{ - timeval_t now; - job_t *job; - - time_monotonic(&now); - this->roam_lock->lock(this->roam_lock); - this->roam_address |= address; - if (!timercmp(&now, &this->next_roam, >)) - { - this->roam_lock->unlock(this->roam_lock); - return; - } - timeval_add_ms(&now, ROAM_DELAY); - this->next_roam = now; - this->roam_lock->unlock(this->roam_lock); - - job = (job_t*)callback_job_create((callback_job_cb_t)roam_event, - this, NULL, NULL); - lib->scheduler->schedule_job_ms(lib->scheduler, job, ROAM_DELAY); -} - -/** - * Data for enumerator over rtmsg sockaddrs - */ -typedef struct { - /** implements enumerator */ - enumerator_t public; - /** copy of attribute bitfield */ - int types; - /** bytes remaining in buffer */ - int remaining; - /** next sockaddr to enumerate */ - struct sockaddr *addr; -} rt_enumerator_t; - -METHOD(enumerator_t, rt_enumerate, bool, - rt_enumerator_t *this, int *xtype, struct sockaddr **addr) -{ - int i, type; - - if (this->remaining < sizeof(this->addr->sa_len) || - this->remaining < this->addr->sa_len) - { - return FALSE; - } - for (i = 0; i < RTAX_MAX; i++) - { - type = (1 << i); - if (this->types & type) - { - this->types &= ~type; - *addr = this->addr; - *xtype = i; - this->remaining -= SA_LEN(this->addr->sa_len); - this->addr = (struct sockaddr*)((char*)this->addr + - SA_LEN(this->addr->sa_len)); - return TRUE; - } - } - return FALSE; -} - -/** - * Create an enumerator over sockaddrs in rt/if messages - */ -static enumerator_t *create_rt_enumerator(int types, int remaining, - struct sockaddr *addr) -{ - rt_enumerator_t *this; - - INIT(this, - .public = { - .enumerate = (void*)_rt_enumerate, - .destroy = (void*)free, - }, - .types = types, - .remaining = remaining, - .addr = addr, - ); - return &this->public; -} - -/** - * Create a safe enumerator over sockaddrs in rt_msghdr - */ -static enumerator_t *create_rtmsg_enumerator(struct rt_msghdr *hdr) -{ - return create_rt_enumerator(hdr->rtm_addrs, hdr->rtm_msglen - sizeof(*hdr), - (struct sockaddr *)(hdr + 1)); -} - -/** - * Create a safe enumerator over sockaddrs in ifa_msghdr - */ -static enumerator_t *create_ifamsg_enumerator(struct ifa_msghdr *hdr) -{ - return create_rt_enumerator(hdr->ifam_addrs, hdr->ifam_msglen - sizeof(*hdr), - (struct sockaddr *)(hdr + 1)); -} - -/** - * Process an RTM_*ADDR message from the kernel - */ -static void process_addr(private_kernel_pfroute_net_t *this, - struct ifa_msghdr *ifa) -{ - struct sockaddr *sockaddr; - host_t *host = NULL; - enumerator_t *ifaces, *addrs; - iface_entry_t *iface; - addr_entry_t *addr; - bool found = FALSE, changed = FALSE, roam = FALSE; - enumerator_t *enumerator; - char *ifname = NULL; - int type; - - enumerator = create_ifamsg_enumerator(ifa); - while (enumerator->enumerate(enumerator, &type, &sockaddr)) - { - if (type == RTAX_IFA) - { - host = host_create_from_sockaddr(sockaddr); - break; - } - } - enumerator->destroy(enumerator); - - if (!host || host->is_anyaddr(host)) - { - DESTROY_IF(host); - return; - } - - this->lock->write_lock(this->lock); - ifaces = this->ifaces->create_enumerator(this->ifaces); - while (ifaces->enumerate(ifaces, &iface)) - { - if (iface->ifindex == ifa->ifam_index) - { - addrs = iface->addrs->create_enumerator(iface->addrs); - while (addrs->enumerate(addrs, &addr)) - { - if (host->ip_equals(host, addr->ip)) - { - found = TRUE; - if (ifa->ifam_type == RTM_DELADDR) - { - iface->addrs->remove_at(iface->addrs, addrs); - if (!addr->virtual && iface->usable) - { - changed = TRUE; - DBG1(DBG_KNL, "%H disappeared from %s", - host, iface->ifname); - } - addr_map_entry_remove(addr, iface, this); - addr_entry_destroy(addr); - } - } - } - addrs->destroy(addrs); - - if (!found && ifa->ifam_type == RTM_NEWADDR) - { - INIT(addr, - .ip = host->clone(host), - ); - changed = TRUE; - ifname = strdup(iface->ifname); - iface->addrs->insert_last(iface->addrs, addr); - addr_map_entry_add(this, addr, iface); - if (iface->usable) - { - DBG1(DBG_KNL, "%H appeared on %s", host, iface->ifname); - } - } - - if (changed && iface_entry_up_and_usable(iface)) - { - roam = TRUE; - } - break; - } - } - ifaces->destroy(ifaces); - this->lock->unlock(this->lock); - host->destroy(host); - - if (roam && ifname) - { - queue_route_reinstall(this, ifname); - } - else - { - free(ifname); - } - - if (roam) - { - fire_roam_event(this, TRUE); - } -} - -/** - * Re-initialize address list of an interface if it changes state - */ -static void repopulate_iface(private_kernel_pfroute_net_t *this, - iface_entry_t *iface) -{ - struct ifaddrs *ifap, *ifa; - addr_entry_t *addr; - - while (iface->addrs->remove_last(iface->addrs, (void**)&addr) == SUCCESS) - { - addr_map_entry_remove(addr, iface, this); - addr_entry_destroy(addr); - } - - if (getifaddrs(&ifap) == 0) - { - for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) - { - if (ifa->ifa_addr && streq(ifa->ifa_name, iface->ifname)) - { - switch (ifa->ifa_addr->sa_family) - { - case AF_INET: - case AF_INET6: - INIT(addr, - .ip = host_create_from_sockaddr(ifa->ifa_addr), - ); - iface->addrs->insert_last(iface->addrs, addr); - addr_map_entry_add(this, addr, iface); - break; - default: - break; - } - } - } - freeifaddrs(ifap); - } -} - -/** - * Process an RTM_IFINFO message from the kernel - */ -static void process_link(private_kernel_pfroute_net_t *this, - struct if_msghdr *msg) -{ - enumerator_t *enumerator; - iface_entry_t *iface; - bool roam = FALSE, found = FALSE, update_routes = FALSE; - - this->lock->write_lock(this->lock); - enumerator = this->ifaces->create_enumerator(this->ifaces); - while (enumerator->enumerate(enumerator, &iface)) - { - if (iface->ifindex == msg->ifm_index) - { - if (iface->usable) - { - if (!(iface->flags & IFF_UP) && (msg->ifm_flags & IFF_UP)) - { - roam = update_routes = TRUE; - DBG1(DBG_KNL, "interface %s activated", iface->ifname); - } - else if ((iface->flags & IFF_UP) && !(msg->ifm_flags & IFF_UP)) - { - roam = TRUE; - DBG1(DBG_KNL, "interface %s deactivated", iface->ifname); - } - } -#ifdef __APPLE__ - /* There seems to be a race condition on 10.10, where we get - * the RTM_IFINFO, but getifaddrs() does not return the virtual - * IP installed on a tun device, but we also don't get a - * RTM_NEWADDR. We therefore could miss the new address, letting - * virtual IP installation fail. Delaying getifaddrs() helps, - * but is obviously not a clean fix. */ - usleep(50000); -#endif - iface->flags = msg->ifm_flags; - repopulate_iface(this, iface); - found = TRUE; - break; - } - } - enumerator->destroy(enumerator); - - if (!found) - { - INIT(iface, - .ifindex = msg->ifm_index, - .flags = msg->ifm_flags, - .addrs = linked_list_create(), - ); - if (if_indextoname(iface->ifindex, iface->ifname)) - { - DBG1(DBG_KNL, "interface %s appeared", iface->ifname); - iface->usable = hydra->kernel_interface->is_interface_usable( - hydra->kernel_interface, iface->ifname); - repopulate_iface(this, iface); - this->ifaces->insert_last(this->ifaces, iface); - if (iface->usable) - { - roam = update_routes = TRUE; - } - } - else - { - free(iface); - } - } - this->lock->unlock(this->lock); - - if (update_routes) - { - queue_route_reinstall(this, strdup(iface->ifname)); - } - - if (roam) - { - fire_roam_event(this, TRUE); - } -} - -#ifdef HAVE_RTM_IFANNOUNCE - -/** - * Process an RTM_IFANNOUNCE message from the kernel - */ -static void process_announce(private_kernel_pfroute_net_t *this, - struct if_announcemsghdr *msg) -{ - enumerator_t *enumerator; - iface_entry_t *iface; - - if (msg->ifan_what != IFAN_DEPARTURE) - { - /* we handle new interfaces in process_link() */ - return; - } - - this->lock->write_lock(this->lock); - enumerator = this->ifaces->create_enumerator(this->ifaces); - while (enumerator->enumerate(enumerator, &iface)) - { - if (iface->ifindex == msg->ifan_index) - { - DBG1(DBG_KNL, "interface %s disappeared", iface->ifname); - this->ifaces->remove_at(this->ifaces, enumerator); - iface_entry_destroy(iface); - break; - } - } - enumerator->destroy(enumerator); - this->lock->unlock(this->lock); -} - -#endif /* HAVE_RTM_IFANNOUNCE */ - -/** - * Process an RTM_*ROUTE message from the kernel - */ -static void process_route(private_kernel_pfroute_net_t *this, - struct rt_msghdr *msg) -{ - -} - -/** - * Receives PF_ROUTE messages from kernel - */ -static bool receive_events(private_kernel_pfroute_net_t *this, int fd, - watcher_event_t event) -{ - struct { - union { - struct rt_msghdr rtm; - struct if_msghdr ifm; - struct ifa_msghdr ifam; -#ifdef HAVE_RTM_IFANNOUNCE - struct if_announcemsghdr ifanm; -#endif - }; - char buf[sizeof(struct sockaddr_storage) * RTAX_MAX]; - } msg; - int len, hdrlen; - - len = recv(this->socket, &msg, sizeof(msg), MSG_DONTWAIT); - if (len < 0) - { - switch (errno) - { - case EINTR: - case EAGAIN: - return TRUE; - default: - DBG1(DBG_KNL, "unable to receive from PF_ROUTE event socket"); - sleep(1); - return TRUE; - } - } - - if (len < offsetof(struct rt_msghdr, rtm_flags) || len < msg.rtm.rtm_msglen) - { - DBG1(DBG_KNL, "received invalid PF_ROUTE message"); - return TRUE; - } - if (msg.rtm.rtm_version != RTM_VERSION) - { - DBG1(DBG_KNL, "received PF_ROUTE message with unsupported version: %d", - msg.rtm.rtm_version); - return TRUE; - } - switch (msg.rtm.rtm_type) - { - case RTM_NEWADDR: - case RTM_DELADDR: - hdrlen = sizeof(msg.ifam); - break; - case RTM_IFINFO: - hdrlen = sizeof(msg.ifm); - break; -#ifdef HAVE_RTM_IFANNOUNCE - case RTM_IFANNOUNCE: - hdrlen = sizeof(msg.ifanm); - break; -#endif /* HAVE_RTM_IFANNOUNCE */ - case RTM_ADD: - case RTM_DELETE: - case RTM_GET: - hdrlen = sizeof(msg.rtm); - break; - default: - return TRUE; - } - if (msg.rtm.rtm_msglen < hdrlen) - { - DBG1(DBG_KNL, "ignoring short PF_ROUTE message"); - return TRUE; - } - switch (msg.rtm.rtm_type) - { - case RTM_NEWADDR: - case RTM_DELADDR: - process_addr(this, &msg.ifam); - break; - case RTM_IFINFO: - process_link(this, &msg.ifm); - break; -#ifdef HAVE_RTM_IFANNOUNCE - case RTM_IFANNOUNCE: - process_announce(this, &msg.ifanm); - break; -#endif /* HAVE_RTM_IFANNOUNCE */ - case RTM_ADD: - case RTM_DELETE: - process_route(this, &msg.rtm); - break; - default: - break; - } - - this->mutex->lock(this->mutex); - if (msg.rtm.rtm_pid == this->pid && msg.rtm.rtm_seq == this->waiting_seq) - { - /* seems like the message someone is waiting for, deliver */ - this->reply = realloc(this->reply, msg.rtm.rtm_msglen); - memcpy(this->reply, &msg, msg.rtm.rtm_msglen); - } - /* signal on any event, add_ip()/del_ip() might wait for it */ - this->condvar->broadcast(this->condvar); - this->mutex->unlock(this->mutex); - - return TRUE; -} - - -/** enumerator over addresses */ -typedef struct { - private_kernel_pfroute_net_t* this; - /** which addresses to enumerate */ - kernel_address_type_t which; -} address_enumerator_t; - -/** - * cleanup function for address enumerator - */ -static void address_enumerator_destroy(address_enumerator_t *data) -{ - data->this->lock->unlock(data->this->lock); - free(data); -} - -/** - * filter for addresses - */ -static bool filter_addresses(address_enumerator_t *data, - addr_entry_t** in, host_t** out) -{ - host_t *ip; - if (!(data->which & ADDR_TYPE_VIRTUAL) && (*in)->virtual) - { /* skip virtual interfaces added by us */ - return FALSE; - } - if (!(data->which & ADDR_TYPE_REGULAR) && !(*in)->virtual) - { /* address is regular, but not requested */ - return FALSE; - } - ip = (*in)->ip; - if (ip->get_family(ip) == AF_INET6) - { - struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)ip->get_sockaddr(ip); - if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) - { /* skip addresses with a unusable scope */ - return FALSE; - } - } - *out = ip; - return TRUE; -} - -/** - * enumerator constructor for interfaces - */ -static enumerator_t *create_iface_enumerator(iface_entry_t *iface, - address_enumerator_t *data) -{ - return enumerator_create_filter(iface->addrs->create_enumerator(iface->addrs), - (void*)filter_addresses, data, NULL); -} - -/** - * filter for interfaces - */ -static bool filter_interfaces(address_enumerator_t *data, iface_entry_t** in, - iface_entry_t** out) -{ - if (!(data->which & ADDR_TYPE_IGNORED) && !(*in)->usable) - { /* skip interfaces excluded by config */ - return FALSE; - } - if (!(data->which & ADDR_TYPE_LOOPBACK) && ((*in)->flags & IFF_LOOPBACK)) - { /* ignore loopback devices */ - return FALSE; - } - if (!(data->which & ADDR_TYPE_DOWN) && !((*in)->flags & IFF_UP)) - { /* skip interfaces not up */ - return FALSE; - } - *out = *in; - return TRUE; -} - -METHOD(kernel_net_t, create_address_enumerator, enumerator_t*, - private_kernel_pfroute_net_t *this, kernel_address_type_t which) -{ - address_enumerator_t *data; - - INIT(data, - .this = this, - .which = which, - ); - - this->lock->read_lock(this->lock); - return enumerator_create_nested( - enumerator_create_filter( - this->ifaces->create_enumerator(this->ifaces), - (void*)filter_interfaces, data, NULL), - (void*)create_iface_enumerator, data, - (void*)address_enumerator_destroy); -} - -METHOD(kernel_net_t, get_features, kernel_feature_t, - private_kernel_pfroute_net_t *this) -{ - return KERNEL_REQUIRE_EXCLUDE_ROUTE; -} - -METHOD(kernel_net_t, get_interface_name, bool, - private_kernel_pfroute_net_t *this, host_t* ip, char **name) -{ - addr_map_entry_t *entry, lookup = { - .ip = ip, - }; - - if (ip->is_anyaddr(ip)) - { - return FALSE; - } - this->lock->read_lock(this->lock); - /* first try to find it on an up and usable interface */ - entry = this->addrs->get_match(this->addrs, &lookup, - (void*)addr_map_entry_match_up_and_usable); - if (entry) - { - if (name) - { - *name = strdup(entry->iface->ifname); - DBG2(DBG_KNL, "%H is on interface %s", ip, *name); - } - this->lock->unlock(this->lock); - return TRUE; - } - /* check if it is a virtual IP */ - entry = this->addrs->get_match(this->addrs, &lookup, - (void*)addr_map_entry_match_virtual); - if (entry) - { - if (name) - { - *name = strdup(entry->iface->ifname); - DBG2(DBG_KNL, "virtual IP %H is on interface %s", ip, *name); - } - this->lock->unlock(this->lock); - return TRUE; - } - /* maybe it is installed on an ignored interface */ - entry = this->addrs->get_match(this->addrs, &lookup, - (void*)addr_map_entry_match_up); - if (!entry) - { /* the address does not exist, is on a down interface */ - DBG2(DBG_KNL, "%H is not a local address or the interface is down", ip); - } - this->lock->unlock(this->lock); - return FALSE; -} - -METHOD(kernel_net_t, add_ip, status_t, - private_kernel_pfroute_net_t *this, host_t *vip, int prefix, - char *ifname) -{ - enumerator_t *ifaces, *addrs; - iface_entry_t *iface; - addr_entry_t *addr; - tun_device_t *tun; - bool timeout = FALSE; - - if (!this->install_virtual_ip) - { /* disabled by config */ - return SUCCESS; - } - - tun = tun_device_create(NULL); - if (!tun) - { - return FAILED; - } - if (prefix == -1) - { - prefix = vip->get_address(vip).len * 8; - } - if (!tun->up(tun) || !tun->set_address(tun, vip, prefix)) - { - tun->destroy(tun); - return FAILED; - } - - /* wait until address appears */ - this->mutex->lock(this->mutex); - while (!timeout && !get_interface_name(this, vip, NULL)) - { - timeout = this->condvar->timed_wait(this->condvar, this->mutex, - this->vip_wait); - } - this->mutex->unlock(this->mutex); - if (timeout) - { - DBG1(DBG_KNL, "virtual IP %H did not appear on %s", - vip, tun->get_name(tun)); - tun->destroy(tun); - return FAILED; - } - - this->lock->write_lock(this->lock); - this->tuns->insert_last(this->tuns, tun); - - ifaces = this->ifaces->create_enumerator(this->ifaces); - while (ifaces->enumerate(ifaces, &iface)) - { - if (streq(iface->ifname, tun->get_name(tun))) - { - addrs = iface->addrs->create_enumerator(iface->addrs); - while (addrs->enumerate(addrs, &addr)) - { - if (addr->ip->ip_equals(addr->ip, vip)) - { - addr->virtual = TRUE; - } - } - addrs->destroy(addrs); - /* during IKEv1 reauthentication, children get moved from - * old the new SA before the virtual IP is available. This - * kills the route for our virtual IP, reinstall. */ - queue_route_reinstall(this, strdup(iface->ifname)); - break; - } - } - ifaces->destroy(ifaces); - /* lets do this while holding the lock, thus preventing another thread - * from deleting the TUN device concurrently, hopefully listeners are quick - * and cause no deadlocks */ - hydra->kernel_interface->tun(hydra->kernel_interface, tun, TRUE); - this->lock->unlock(this->lock); - - return SUCCESS; -} - -METHOD(kernel_net_t, del_ip, status_t, - private_kernel_pfroute_net_t *this, host_t *vip, int prefix, - bool wait) -{ - enumerator_t *enumerator; - tun_device_t *tun; - host_t *addr; - bool timeout = FALSE, found = FALSE; - - if (!this->install_virtual_ip) - { /* disabled by config */ - return SUCCESS; - } - - this->lock->write_lock(this->lock); - enumerator = this->tuns->create_enumerator(this->tuns); - while (enumerator->enumerate(enumerator, &tun)) - { - addr = tun->get_address(tun, NULL); - if (addr && addr->ip_equals(addr, vip)) - { - this->tuns->remove_at(this->tuns, enumerator); - hydra->kernel_interface->tun(hydra->kernel_interface, tun, - FALSE); - tun->destroy(tun); - found = TRUE; - break; - } - } - enumerator->destroy(enumerator); - this->lock->unlock(this->lock); - - if (!found) - { - return NOT_FOUND; - } - /* wait until address disappears */ - if (wait) - { - this->mutex->lock(this->mutex); - while (!timeout && get_interface_name(this, vip, NULL)) - { - timeout = this->condvar->timed_wait(this->condvar, this->mutex, - this->vip_wait); - } - this->mutex->unlock(this->mutex); - if (timeout) - { - DBG1(DBG_KNL, "virtual IP %H did not disappear from tun", vip); - return FAILED; - } - } - return SUCCESS; -} - -/** - * Append a sockaddr_in/in6 of given type to routing message - */ -static void add_rt_addr(struct rt_msghdr *hdr, int type, host_t *addr) -{ - if (addr) - { - int len; - - len = *addr->get_sockaddr_len(addr); - memcpy((char*)hdr + hdr->rtm_msglen, addr->get_sockaddr(addr), len); - hdr->rtm_msglen += SA_LEN(len); - hdr->rtm_addrs |= type; - } -} - -/** - * Append a subnet mask sockaddr using the given prefix to routing message - */ -static void add_rt_mask(struct rt_msghdr *hdr, int type, int family, int prefix) -{ - host_t *mask; - - mask = host_create_netmask(family, prefix); - if (mask) - { - add_rt_addr(hdr, type, mask); - mask->destroy(mask); - } -} - -/** - * Append an interface name sockaddr_dl to routing message - */ -static void add_rt_ifname(struct rt_msghdr *hdr, int type, char *name) -{ - struct sockaddr_dl sdl = { - .sdl_len = sizeof(struct sockaddr_dl), - .sdl_family = AF_LINK, - .sdl_nlen = strlen(name), - }; - - if (strlen(name) <= sizeof(sdl.sdl_data)) - { - memcpy(sdl.sdl_data, name, sdl.sdl_nlen); - memcpy((char*)hdr + hdr->rtm_msglen, &sdl, sdl.sdl_len); - hdr->rtm_msglen += SA_LEN(sdl.sdl_len); - hdr->rtm_addrs |= type; - } -} - -/** - * Add or remove a route - */ -static status_t manage_route(private_kernel_pfroute_net_t *this, int op, - chunk_t dst_net, u_int8_t prefixlen, - host_t *gateway, char *if_name) -{ - struct { - struct rt_msghdr hdr; - char buf[sizeof(struct sockaddr_storage) * RTAX_MAX]; - } msg = { - .hdr = { - .rtm_version = RTM_VERSION, - .rtm_type = op, - .rtm_flags = RTF_UP | RTF_STATIC, - .rtm_pid = this->pid, - .rtm_seq = ref_get(&this->seq), - }, - }; - host_t *dst; - int type; - - if (prefixlen == 0 && dst_net.len) - { - status_t status; - chunk_t half; - - half = chunk_clonea(dst_net); - half.ptr[0] |= 0x80; - prefixlen = 1; - status = manage_route(this, op, half, prefixlen, gateway, if_name); - if (status != SUCCESS) - { - return status; - } - } - - dst = host_create_from_chunk(AF_UNSPEC, dst_net, 0); - if (!dst) - { - return FAILED; - } - - if ((dst->get_family(dst) == AF_INET && prefixlen == 32) || - (dst->get_family(dst) == AF_INET6 && prefixlen == 128)) - { - msg.hdr.rtm_flags |= RTF_HOST | RTF_GATEWAY; - } - - msg.hdr.rtm_msglen = sizeof(struct rt_msghdr); - for (type = 0; type < RTAX_MAX; type++) - { - switch (type) - { - case RTAX_DST: - add_rt_addr(&msg.hdr, RTA_DST, dst); - break; - case RTAX_NETMASK: - if (!(msg.hdr.rtm_flags & RTF_HOST)) - { - add_rt_mask(&msg.hdr, RTA_NETMASK, - dst->get_family(dst), prefixlen); - } - break; - case RTAX_IFP: - if (if_name) - { - add_rt_ifname(&msg.hdr, RTA_IFP, if_name); - } - break; - case RTAX_GATEWAY: - if (gateway) - { - add_rt_addr(&msg.hdr, RTA_GATEWAY, gateway); - } - break; - default: - break; - } - } - dst->destroy(dst); - - if (send(this->socket, &msg, msg.hdr.rtm_msglen, 0) != msg.hdr.rtm_msglen) - { - if (errno == EEXIST) - { - return ALREADY_DONE; - } - DBG1(DBG_KNL, "%s PF_ROUTE route failed: %s", - op == RTM_ADD ? "adding" : "deleting", strerror(errno)); - return FAILED; - } - return SUCCESS; -} - -METHOD(kernel_net_t, add_route, status_t, - private_kernel_pfroute_net_t *this, chunk_t dst_net, u_int8_t prefixlen, - host_t *gateway, host_t *src_ip, char *if_name) -{ - status_t status; - route_entry_t *found, route = { - .dst_net = dst_net, - .prefixlen = prefixlen, - .gateway = gateway, - .if_name = if_name, - }; - - this->routes_lock->lock(this->routes_lock); - found = this->routes->get(this->routes, &route); - if (found) - { - this->routes_lock->unlock(this->routes_lock); - return ALREADY_DONE; - } - status = manage_route(this, RTM_ADD, dst_net, prefixlen, gateway, if_name); - if (status == SUCCESS) - { - found = route_entry_clone(&route); - this->routes->put(this->routes, found, found); - } - this->routes_lock->unlock(this->routes_lock); - return status; -} - -METHOD(kernel_net_t, del_route, status_t, - private_kernel_pfroute_net_t *this, chunk_t dst_net, u_int8_t prefixlen, - host_t *gateway, host_t *src_ip, char *if_name) -{ - status_t status; - route_entry_t *found, route = { - .dst_net = dst_net, - .prefixlen = prefixlen, - .gateway = gateway, - .if_name = if_name, - }; - - this->routes_lock->lock(this->routes_lock); - found = this->routes->get(this->routes, &route); - if (!found) - { - this->routes_lock->unlock(this->routes_lock); - return NOT_FOUND; - } - this->routes->remove(this->routes, found); - route_entry_destroy(found); - status = manage_route(this, RTM_DELETE, dst_net, prefixlen, gateway, - if_name); - this->routes_lock->unlock(this->routes_lock); - return status; -} - -/** - * Do a route lookup for dest and return either the nexthop or the source - * address. - */ -static host_t *get_route(private_kernel_pfroute_net_t *this, bool nexthop, - host_t *dest, host_t *src) -{ - struct { - struct rt_msghdr hdr; - char buf[sizeof(struct sockaddr_storage) * RTAX_MAX]; - } msg = { - .hdr = { - .rtm_version = RTM_VERSION, - .rtm_type = RTM_GET, - .rtm_pid = this->pid, - .rtm_seq = ref_get(&this->seq), - }, - }; - host_t *host = NULL; - enumerator_t *enumerator; - struct sockaddr *addr; - bool failed = FALSE; - int type; - -retry: - msg.hdr.rtm_msglen = sizeof(struct rt_msghdr); - for (type = 0; type < RTAX_MAX; type++) - { - switch (type) - { - case RTAX_DST: - add_rt_addr(&msg.hdr, RTA_DST, dest); - break; - case RTAX_IFA: - add_rt_addr(&msg.hdr, RTA_IFA, src); - break; - case RTAX_IFP: - if (!nexthop) - { /* add an empty IFP to ensure we get a source address */ - add_rt_ifname(&msg.hdr, RTA_IFP, ""); - } - break; - default: - break; - } - } - this->mutex->lock(this->mutex); - - while (this->waiting_seq) - { - this->condvar->wait(this->condvar, this->mutex); - } - this->waiting_seq = msg.hdr.rtm_seq; - if (send(this->socket, &msg, msg.hdr.rtm_msglen, 0) == msg.hdr.rtm_msglen) - { - while (TRUE) - { - if (this->condvar->timed_wait(this->condvar, this->mutex, 1000)) - { /* timed out? */ - break; - } - if (!this->reply) - { - continue; - } - enumerator = create_rtmsg_enumerator(this->reply); - while (enumerator->enumerate(enumerator, &type, &addr)) - { - if (nexthop) - { - if (type == RTAX_DST && this->reply->rtm_flags & RTF_HOST) - { /* probably a cloned/cached direct route, only use that - * as fallback if no gateway is found */ - host = host ?: host_create_from_sockaddr(addr); - } - if (type == RTAX_GATEWAY) - { /* could actually be a MAC address */ - host_t *gtw = host_create_from_sockaddr(addr); - if (gtw) - { - DESTROY_IF(host); - host = gtw; - } - } - } - else - { - if (type == RTAX_IFA) - { - host = host_create_from_sockaddr(addr); - } - } - } - enumerator->destroy(enumerator); - break; - } - } - else - { - failed = TRUE; - } - free(this->reply); - this->reply = NULL; - /* signal completion of query to a waiting thread */ - this->waiting_seq = 0; - this->condvar->signal(this->condvar); - this->mutex->unlock(this->mutex); - - if (failed) - { - if (src) - { /* the given source address might be gone, try again without */ - src = NULL; - msg.hdr.rtm_seq = ref_get(&this->seq); - msg.hdr.rtm_addrs = 0; - memset(msg.buf, 0, sizeof(msg.buf)); - goto retry; - } - DBG1(DBG_KNL, "PF_ROUTE lookup failed: %s", strerror(errno)); - } - if (nexthop) - { - host = host ?: dest->clone(dest); - } - else - { /* make sure the source address is not virtual and usable */ - addr_entry_t *entry, lookup = { - .ip = host, - }; - - if (!host) - { - return NULL; - } - this->lock->read_lock(this->lock); - entry = this->addrs->get_match(this->addrs, &lookup, - (void*)addr_map_entry_match_up_and_usable); - this->lock->unlock(this->lock); - if (!entry) - { - host->destroy(host); - return NULL; - } - } - DBG2(DBG_KNL, "using %H as %s to reach %H", host, - nexthop ? "nexthop" : "address", dest); - return host; -} - -METHOD(kernel_net_t, get_source_addr, host_t*, - private_kernel_pfroute_net_t *this, host_t *dest, host_t *src) -{ - return get_route(this, FALSE, dest, src); -} - -METHOD(kernel_net_t, get_nexthop, host_t*, - private_kernel_pfroute_net_t *this, host_t *dest, int prefix, host_t *src) -{ - return get_route(this, TRUE, dest, src); -} - -/** - * Initialize a list of local addresses. - */ -static status_t init_address_list(private_kernel_pfroute_net_t *this) -{ - struct ifaddrs *ifap, *ifa; - iface_entry_t *iface, *current; - addr_entry_t *addr; - enumerator_t *ifaces, *addrs; - - DBG2(DBG_KNL, "known interfaces and IP addresses:"); - - if (getifaddrs(&ifap) < 0) - { - DBG1(DBG_KNL, " failed to get interfaces!"); - return FAILED; - } - - for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) - { - if (ifa->ifa_addr == NULL) - { - continue; - } - switch(ifa->ifa_addr->sa_family) - { - case AF_LINK: - case AF_INET: - case AF_INET6: - { - iface = NULL; - ifaces = this->ifaces->create_enumerator(this->ifaces); - while (ifaces->enumerate(ifaces, ¤t)) - { - if (streq(current->ifname, ifa->ifa_name)) - { - iface = current; - break; - } - } - ifaces->destroy(ifaces); - - if (!iface) - { - INIT(iface, - .ifindex = if_nametoindex(ifa->ifa_name), - .flags = ifa->ifa_flags, - .addrs = linked_list_create(), - .usable = hydra->kernel_interface->is_interface_usable( - hydra->kernel_interface, ifa->ifa_name), - ); - memcpy(iface->ifname, ifa->ifa_name, IFNAMSIZ); - this->ifaces->insert_last(this->ifaces, iface); - } - - if (ifa->ifa_addr->sa_family != AF_LINK) - { - INIT(addr, - .ip = host_create_from_sockaddr(ifa->ifa_addr), - ); - iface->addrs->insert_last(iface->addrs, addr); - addr_map_entry_add(this, addr, iface); - } - } - } - } - freeifaddrs(ifap); - - ifaces = this->ifaces->create_enumerator(this->ifaces); - while (ifaces->enumerate(ifaces, &iface)) - { - if (iface->usable && iface->flags & IFF_UP) - { - DBG2(DBG_KNL, " %s", iface->ifname); - addrs = iface->addrs->create_enumerator(iface->addrs); - while (addrs->enumerate(addrs, (void**)&addr)) - { - DBG2(DBG_KNL, " %H", addr->ip); - } - addrs->destroy(addrs); - } - } - ifaces->destroy(ifaces); - - return SUCCESS; -} - -METHOD(kernel_net_t, destroy, void, - private_kernel_pfroute_net_t *this) -{ - enumerator_t *enumerator; - route_entry_t *route; - addr_entry_t *addr; - - enumerator = this->routes->create_enumerator(this->routes); - while (enumerator->enumerate(enumerator, NULL, (void**)&route)) - { - manage_route(this, RTM_DELETE, route->dst_net, route->prefixlen, - route->gateway, route->if_name); - route_entry_destroy(route); - } - enumerator->destroy(enumerator); - this->routes->destroy(this->routes); - this->routes_lock->destroy(this->routes_lock); - - if (this->socket != -1) - { - lib->watcher->remove(lib->watcher, this->socket); - close(this->socket); - } - - net_changes_clear(this); - this->net_changes->destroy(this->net_changes); - this->net_changes_lock->destroy(this->net_changes_lock); - - enumerator = this->addrs->create_enumerator(this->addrs); - while (enumerator->enumerate(enumerator, NULL, (void**)&addr)) - { - free(addr); - } - enumerator->destroy(enumerator); - this->addrs->destroy(this->addrs); - this->ifaces->destroy_function(this->ifaces, (void*)iface_entry_destroy); - this->tuns->destroy(this->tuns); - this->lock->destroy(this->lock); - this->mutex->destroy(this->mutex); - this->condvar->destroy(this->condvar); - this->roam_lock->destroy(this->roam_lock); - free(this->reply); - free(this); -} - -/* - * Described in header. - */ -kernel_pfroute_net_t *kernel_pfroute_net_create() -{ - private_kernel_pfroute_net_t *this; - - INIT(this, - .public = { - .interface = { - .get_features = _get_features, - .get_interface = _get_interface_name, - .create_address_enumerator = _create_address_enumerator, - .get_source_addr = _get_source_addr, - .get_nexthop = _get_nexthop, - .add_ip = _add_ip, - .del_ip = _del_ip, - .add_route = _add_route, - .del_route = _del_route, - .destroy = _destroy, - }, - }, - .pid = getpid(), - .ifaces = linked_list_create(), - .addrs = hashtable_create( - (hashtable_hash_t)addr_map_entry_hash, - (hashtable_equals_t)addr_map_entry_equals, 16), - .routes = hashtable_create((hashtable_hash_t)route_entry_hash, - (hashtable_equals_t)route_entry_equals, 16), - .net_changes = hashtable_create( - (hashtable_hash_t)net_change_hash, - (hashtable_equals_t)net_change_equals, 16), - .tuns = linked_list_create(), - .lock = rwlock_create(RWLOCK_TYPE_DEFAULT), - .mutex = mutex_create(MUTEX_TYPE_DEFAULT), - .condvar = condvar_create(CONDVAR_TYPE_DEFAULT), - .routes_lock = mutex_create(MUTEX_TYPE_DEFAULT), - .net_changes_lock = mutex_create(MUTEX_TYPE_DEFAULT), - .roam_lock = spinlock_create(), - .vip_wait = lib->settings->get_int(lib->settings, - "%s.plugins.kernel-pfroute.vip_wait", 1000, lib->ns), - .install_virtual_ip = lib->settings->get_bool(lib->settings, - "%s.install_virtual_ip", TRUE, lib->ns), - ); - timerclear(&this->last_route_reinstall); - timerclear(&this->next_roam); - - /* create a PF_ROUTE socket to communicate with the kernel */ - this->socket = socket(PF_ROUTE, SOCK_RAW, AF_UNSPEC); - if (this->socket == -1) - { - DBG1(DBG_KNL, "unable to create PF_ROUTE socket"); - destroy(this); - return NULL; - } - - if (streq(lib->ns, "starter")) - { - /* starter has no threads, so we do not register for kernel events */ - if (shutdown(this->socket, SHUT_RD) != 0) - { - DBG1(DBG_KNL, "closing read end of PF_ROUTE socket failed: %s", - strerror(errno)); - } - } - else - { - lib->watcher->add(lib->watcher, this->socket, WATCHER_READ, - (watcher_cb_t)receive_events, this); - } - if (init_address_list(this) != SUCCESS) - { - DBG1(DBG_KNL, "unable to get interface list"); - destroy(this); - return NULL; - } - - return &this->public; -} diff --git a/src/libhydra/plugins/kernel_pfroute/kernel_pfroute_net.h b/src/libhydra/plugins/kernel_pfroute/kernel_pfroute_net.h deleted file mode 100644 index 10c3c9eb7..000000000 --- a/src/libhydra/plugins/kernel_pfroute/kernel_pfroute_net.h +++ /dev/null @@ -1,46 +0,0 @@ -/* - * Copyright (C) 2009 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -/** - * @defgroup kernel_pfroute_net_i kernel_pfroute_net - * @{ @ingroup kernel_pfroute - */ - -#ifndef KERNEL_PFROUTE_NET_H_ -#define KERNEL_PFROUTE_NET_H_ - -#include <kernel/kernel_net.h> - -typedef struct kernel_pfroute_net_t kernel_pfroute_net_t; - -/** - * Implementation of the kernel net interface using PF_ROUTE. - */ -struct kernel_pfroute_net_t { - - /** - * Implements kernel_net_t interface - */ - kernel_net_t interface; -}; - -/** - * Create a PF_ROUTE kernel net interface instance. - * - * @return kernel_pfroute_net_t instance - */ -kernel_pfroute_net_t *kernel_pfroute_net_create(); - -#endif /** KERNEL_PFROUTE_NET_H_ @}*/ diff --git a/src/libhydra/plugins/kernel_pfroute/kernel_pfroute_plugin.c b/src/libhydra/plugins/kernel_pfroute/kernel_pfroute_plugin.c deleted file mode 100644 index 09068b33e..000000000 --- a/src/libhydra/plugins/kernel_pfroute/kernel_pfroute_plugin.c +++ /dev/null @@ -1,76 +0,0 @@ -/* - * Copyright (C) 2009 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - - -#include "kernel_pfroute_plugin.h" - -#include "kernel_pfroute_net.h" - -#include <hydra.h> - -typedef struct private_kernel_pfroute_plugin_t private_kernel_pfroute_plugin_t; - -/** - * private data of kernel PF_ROUTE plugin - */ -struct private_kernel_pfroute_plugin_t { - /** - * implements plugin interface - */ - kernel_pfroute_plugin_t public; -}; - -METHOD(plugin_t, get_name, char*, - private_kernel_pfroute_plugin_t *this) -{ - return "kernel-pfroute"; -} - -METHOD(plugin_t, get_features, int, - private_kernel_pfroute_plugin_t *this, plugin_feature_t *features[]) -{ - static plugin_feature_t f[] = { - PLUGIN_CALLBACK(kernel_net_register, kernel_pfroute_net_create), - PLUGIN_PROVIDE(CUSTOM, "kernel-net"), - }; - *features = f; - return countof(f); -} - -METHOD(plugin_t, destroy, void, - private_kernel_pfroute_plugin_t *this) -{ - free(this); -} - -/* - * see header file - */ -plugin_t *kernel_pfroute_plugin_create() -{ - private_kernel_pfroute_plugin_t *this; - - INIT(this, - .public = { - .plugin = { - .get_name = _get_name, - .get_features = _get_features, - .destroy = _destroy, - }, - }, - ); - - return &this->public.plugin; -} diff --git a/src/libhydra/plugins/kernel_pfroute/kernel_pfroute_plugin.h b/src/libhydra/plugins/kernel_pfroute/kernel_pfroute_plugin.h deleted file mode 100644 index b8ee31a1d..000000000 --- a/src/libhydra/plugins/kernel_pfroute/kernel_pfroute_plugin.h +++ /dev/null @@ -1,42 +0,0 @@ -/* - * Copyright (C) 2009 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -/** - * @defgroup kernel_pfroute kernel_pfroute - * @ingroup hplugins - * - * @defgroup kernel_pfroute_plugin kernel_pfroute_plugin - * @{ @ingroup kernel_pfroute - */ - -#ifndef KERNEL_PFROUTE_PLUGIN_H_ -#define KERNEL_PFROUTE_PLUGIN_H_ - -#include <plugins/plugin.h> - -typedef struct kernel_pfroute_plugin_t kernel_pfroute_plugin_t; - -/** - * PF_ROUTE kernel interface plugin - */ -struct kernel_pfroute_plugin_t { - - /** - * implements plugin interface - */ - plugin_t plugin; -}; - -#endif /** KERNEL_PFROUTE_PLUGIN_H_ @}*/ diff --git a/src/libhydra/tests/Makefile.am b/src/libhydra/tests/Makefile.am deleted file mode 100644 index 5acd5c28c..000000000 --- a/src/libhydra/tests/Makefile.am +++ /dev/null @@ -1,18 +0,0 @@ -TESTS = hydra_tests - -check_PROGRAMS = $(TESTS) - -hydra_tests_SOURCES = \ - hydra_tests.h hydra_tests.c - -hydra_tests_CFLAGS = \ - -I$(top_srcdir)/src/libhydra \ - -I$(top_srcdir)/src/libstrongswan \ - -I$(top_srcdir)/src/libstrongswan/tests \ - @COVERAGE_CFLAGS@ - -hydra_tests_LDFLAGS = @COVERAGE_LDFLAGS@ -hydra_tests_LDADD = \ - $(top_builddir)/src/libhydra/libhydra.la \ - $(top_builddir)/src/libstrongswan/libstrongswan.la \ - $(top_builddir)/src/libstrongswan/tests/libtest.la diff --git a/src/libhydra/tests/Makefile.in b/src/libhydra/tests/Makefile.in deleted file mode 100644 index 1fa889d67..000000000 --- a/src/libhydra/tests/Makefile.in +++ /dev/null @@ -1,839 +0,0 @@ -# Makefile.in generated by automake 1.14.1 from Makefile.am. -# @configure_input@ - -# Copyright (C) 1994-2013 Free Software Foundation, Inc. - -# This Makefile.in is free software; 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License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -#include <test_runner.h> -#include <hydra.h> - -/* declare test suite constructors */ -#define TEST_SUITE(x) test_suite_t* x(); -#define TEST_SUITE_DEPEND(x, ...) TEST_SUITE(x) -#include "hydra_tests.h" -#undef TEST_SUITE -#undef TEST_SUITE_DEPEND - -static test_configuration_t tests[] = { -#define TEST_SUITE(x) \ - { .suite = x, }, -#define TEST_SUITE_DEPEND(x, type, ...) \ - { .suite = x, .feature = PLUGIN_DEPENDS(type, __VA_ARGS__) }, -#include "hydra_tests.h" - { .suite = NULL, } -}; - -static bool test_runner_init(bool init) -{ - if (init) - { - libhydra_init(); - } - else - { - lib->processor->set_threads(lib->processor, 0); - lib->processor->cancel(lib->processor); - libhydra_deinit(); - } - return TRUE; -} - -int main(int argc, char *argv[]) -{ - return test_runner_run("libhydra", tests, test_runner_init); -} diff --git a/src/libhydra/tests/hydra_tests.h b/src/libhydra/tests/hydra_tests.h deleted file mode 100644 index 6b213d026..000000000 --- a/src/libhydra/tests/hydra_tests.h +++ /dev/null @@ -1,14 +0,0 @@ -/* - * Copyright (C) 2014 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ |