diff options
Diffstat (limited to 'src/libhydra/kernel')
| -rw-r--r-- | src/libhydra/kernel/kernel_interface.c | 1086 | ||||
| -rw-r--r-- | src/libhydra/kernel/kernel_interface.h | 655 | ||||
| -rw-r--r-- | src/libhydra/kernel/kernel_ipsec.c | 38 | ||||
| -rw-r--r-- | src/libhydra/kernel/kernel_ipsec.h | 297 | ||||
| -rw-r--r-- | src/libhydra/kernel/kernel_listener.h | 107 | ||||
| -rw-r--r-- | src/libhydra/kernel/kernel_net.c | 38 | ||||
| -rw-r--r-- | src/libhydra/kernel/kernel_net.h | 196 |
7 files changed, 0 insertions, 2417 deletions
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); - -#endif /** KERNEL_NET_H_ @}*/ |