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-rw-r--r--src/charon/plugins/kernel_netlink/Makefile.am13
-rw-r--r--src/charon/plugins/kernel_netlink/Makefile.in579
-rw-r--r--src/charon/plugins/kernel_netlink/kernel_netlink_ipsec.c2069
-rw-r--r--src/charon/plugins/kernel_netlink/kernel_netlink_ipsec.h46
-rw-r--r--src/charon/plugins/kernel_netlink/kernel_netlink_net.c1424
-rw-r--r--src/charon/plugins/kernel_netlink/kernel_netlink_net.h46
-rw-r--r--src/charon/plugins/kernel_netlink/kernel_netlink_plugin.c59
-rw-r--r--src/charon/plugins/kernel_netlink/kernel_netlink_plugin.h47
-rw-r--r--src/charon/plugins/kernel_netlink/kernel_netlink_shared.c298
-rw-r--r--src/charon/plugins/kernel_netlink/kernel_netlink_shared.h77
10 files changed, 0 insertions, 4658 deletions
diff --git a/src/charon/plugins/kernel_netlink/Makefile.am b/src/charon/plugins/kernel_netlink/Makefile.am
deleted file mode 100644
index 31d9c6d5c..000000000
--- a/src/charon/plugins/kernel_netlink/Makefile.am
+++ /dev/null
@@ -1,13 +0,0 @@
-
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-
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-
-libstrongswan_kernel_netlink_la_SOURCES = kernel_netlink_plugin.h kernel_netlink_plugin.c \
- kernel_netlink_ipsec.h kernel_netlink_ipsec.c kernel_netlink_net.h kernel_netlink_net.c \
- kernel_netlink_shared.h kernel_netlink_shared.c
-libstrongswan_kernel_netlink_la_LDFLAGS = -module -avoid-version
diff --git a/src/charon/plugins/kernel_netlink/Makefile.in b/src/charon/plugins/kernel_netlink/Makefile.in
deleted file mode 100644
index 09be50587..000000000
--- a/src/charon/plugins/kernel_netlink/Makefile.in
+++ /dev/null
@@ -1,579 +0,0 @@
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- find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
- fi; \
- cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
- else \
- test -f "$(distdir)/$$file" \
- || cp -p $$d/$$file "$(distdir)/$$file" \
- || exit 1; \
- fi; \
- done
-check-am: all-am
-check: check-am
-all-am: Makefile $(LTLIBRARIES)
-installdirs:
- for dir in "$(DESTDIR)$(plugindir)"; do \
- test -z "$$dir" || $(MKDIR_P) "$$dir"; \
- done
-install: install-am
-install-exec: install-exec-am
-install-data: install-data-am
-uninstall: uninstall-am
-
-install-am: all-am
- @$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
-
-installcheck: installcheck-am
-install-strip:
- $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
- install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
- `test -z '$(STRIP)' || \
- echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install
-mostlyclean-generic:
-
-clean-generic:
-
-distclean-generic:
- -test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
- -test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
-
-maintainer-clean-generic:
- @echo "This command is intended for maintainers to use"
- @echo "it deletes files that may require special tools to rebuild."
-clean: clean-am
-
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- mostlyclean-am
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-distclean: distclean-am
- -rm -rf ./$(DEPDIR)
- -rm -f Makefile
-distclean-am: clean-am distclean-compile distclean-generic \
- distclean-tags
-
-dvi: dvi-am
-
-dvi-am:
-
-html: html-am
-
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-
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- mostlyclean-libtool
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-.MAKE: install-am install-strip
-
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- distclean-compile distclean-generic distclean-libtool \
- distclean-tags distdir dvi dvi-am html html-am info info-am \
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-
-
-# 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/charon/plugins/kernel_netlink/kernel_netlink_ipsec.c b/src/charon/plugins/kernel_netlink/kernel_netlink_ipsec.c
deleted file mode 100644
index 850876b9d..000000000
--- a/src/charon/plugins/kernel_netlink/kernel_netlink_ipsec.c
+++ /dev/null
@@ -1,2069 +0,0 @@
-/*
- * Copyright (C) 2006-2009 Tobias Brunner
- * Copyright (C) 2005-2009 Martin Willi
- * Copyright (C) 2008 Andreas Steffen
- * Copyright (C) 2006-2007 Fabian Hartmann, Noah Heusser
- * Copyright (C) 2006 Daniel Roethlisberger
- * 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.
- */
-
-#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 <daemon.h>
-#include <threading/thread.h>
-#include <threading/mutex.h>
-#include <utils/hashtable.h>
-#include <processing/jobs/callback_job.h>
-#include <processing/jobs/acquire_job.h>
-#include <processing/jobs/migrate_job.h>
-#include <processing/jobs/rekey_child_sa_job.h>
-#include <processing/jobs/delete_child_sa_job.h>
-#include <processing/jobs/update_sa_job.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*/
-
-/** default priority of installed policies */
-#define PRIO_LOW 3000
-#define PRIO_HIGH 2000
-
-/**
- * map the limit for bytes and packets to XFRM_INF per 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 a pointer to the next rtattr following rta.
- * !!! do not use this to parse messages. use RTA_NEXT and RTA_OK instead !!!
- */
-#define XFRM_RTA_NEXT(rta) ((struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len)))
-/**
- * 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_KMADDRESS,
- "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"
-);
-
-#define END_OF_LIST -1
-
-/**
- * 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, "cast128" },
- {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, "***" }, */
- {ENCR_CAMELLIA_CBC, "cbc(camellia)" },
-/* {ENCR_CAMELLIA_CTR, "***" }, */
-/* {ENCR_CAMELLIA_CCM_ICV8, "***" }, */
-/* {ENCR_CAMELLIA_CCM_ICV12, "***" }, */
-/* {ENCR_CAMELLIA_CCM_ICV16, "***" }, */
- {END_OF_LIST, NULL }
-};
-
-/**
- * Algorithms for integrity protection
- */
-static kernel_algorithm_t integrity_algs[] = {
- {AUTH_HMAC_MD5_96, "md5" },
- {AUTH_HMAC_SHA1_96, "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)" },
- {END_OF_LIST, NULL }
-};
-
-/**
- * Algorithms for IPComp
- */
-static kernel_algorithm_t compression_algs[] = {
-/* {IPCOMP_OUI, "***" }, */
- {IPCOMP_DEFLATE, "deflate" },
- {IPCOMP_LZS, "lzs" },
- {IPCOMP_LZJH, "lzjh" },
- {END_OF_LIST, NULL }
-};
-
-/**
- * Look up a kernel algorithm name and its key size
- */
-static char* lookup_algorithm(kernel_algorithm_t *list, int ikev2)
-{
- while (list->ikev2 != END_OF_LIST)
- {
- if (list->ikev2 == ikev2)
- {
- return list->name;
- }
- list++;
- }
- return NULL;
-}
-
-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 an 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);
-}
-
-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;
-
- /** associated route installed for this policy */
- route_entry_t *route;
-
- /** by how many CHILD_SA's this policy is used */
- u_int refcount;
-};
-
-/**
- * Hash function for policy_entry_t objects
- */
-static u_int policy_hash(policy_entry_t *key)
-{
- chunk_t chunk = chunk_create((void*)&key->sel, sizeof(struct xfrm_selector));
- return chunk_hash(chunk);
-}
-
-/**
- * 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->direction == other_key->direction;
-}
-
-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 various lists
- */
- mutex_t *mutex;
-
- /**
- * Hash table of installed policies (policy_entry_t)
- */
- hashtable_t *policies;
-
- /**
- * job receiving netlink events
- */
- callback_job_t *job;
-
- /**
- * 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;
-};
-
-/**
- * convert a IKEv2 specific protocol identifier to the kernel one
- */
-static u_int8_t proto_ike2kernel(protocol_id_t proto)
-{
- switch (proto)
- {
- case PROTO_ESP:
- return IPPROTO_ESP;
- case PROTO_AH:
- return IPPROTO_AH;
- default:
- return proto;
- }
-}
-
-/**
- * reverse of ike2kernel
- */
-static protocol_id_t proto_kernel2ike(u_int8_t proto)
-{
- switch (proto)
- {
- case IPPROTO_ESP:
- return PROTO_ESP;
- case IPPROTO_AH:
- return PROTO_AH;
- default:
- return proto;
- }
-}
-
-/**
- * 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 a xfrm_selector
- */
-static struct xfrm_selector ts2selector(traffic_selector_t *src,
- traffic_selector_t *dst)
-{
- struct xfrm_selector sel;
-
- 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);
- sel.ifindex = 0;
- sel.user = 0;
-
- return sel;
-}
-
-/**
- * convert a 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 = htons(sel->sport);
- }
- }
- else
- {
- addr = (u_char*)&sel->daddr;
- prefixlen = sel->prefixlen_d;
- if (sel->dport_mask)
- {
- port = htons(sel->dport);
- }
- }
-
- /* 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);
- }
- return NULL;
-}
-
-/**
- * process a XFRM_MSG_ACQUIRE from kernel
- */
-static void process_acquire(private_kernel_netlink_ipsec_t *this, struct nlmsghdr *hdr)
-{
- u_int32_t reqid = 0;
- int proto = 0;
- traffic_selector_t *src_ts, *dst_ts;
- struct xfrm_user_acquire *acquire;
- struct rtattr *rta;
- size_t rtasize;
- job_t *job;
-
- acquire = (struct xfrm_user_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);
- DBG1(DBG_KNL, "creating acquire job for policy %R === %R with reqid {%u}",
- src_ts, dst_ts, reqid);
- job = (job_t*)acquire_job_create(reqid, src_ts, dst_ts);
- charon->processor->queue_job(charon->processor, job);
-}
-
-/**
- * process a XFRM_MSG_EXPIRE from kernel
- */
-static void process_expire(private_kernel_netlink_ipsec_t *this, struct nlmsghdr *hdr)
-{
- job_t *job;
- protocol_id_t protocol;
- u_int32_t spi, reqid;
- struct xfrm_user_expire *expire;
-
- expire = (struct xfrm_user_expire*)NLMSG_DATA(hdr);
- protocol = proto_kernel2ike(expire->state.id.proto);
- spi = expire->state.id.spi;
- reqid = expire->state.reqid;
-
- DBG2(DBG_KNL, "received a XFRM_MSG_EXPIRE");
-
- if (protocol != PROTO_ESP && protocol != PROTO_AH)
- {
- DBG2(DBG_KNL, "ignoring XFRM_MSG_EXPIRE for SA with SPI %.8x and reqid {%u} "
- "which is not a CHILD_SA", ntohl(spi), reqid);
- return;
- }
-
- DBG1(DBG_KNL, "creating %s job for %N CHILD_SA with SPI %.8x and reqid {%d}",
- expire->hard ? "delete" : "rekey", protocol_id_names,
- protocol, ntohl(spi), reqid);
- if (expire->hard)
- {
- job = (job_t*)delete_child_sa_job_create(reqid, protocol, spi);
- }
- else
- {
- job = (job_t*)rekey_child_sa_job_create(reqid, protocol, spi);
- }
- charon->processor->queue_job(charon->processor, job);
-}
-
-/**
- * process a XFRM_MSG_MIGRATE from kernel
- */
-static void process_migrate(private_kernel_netlink_ipsec_t *this, struct nlmsghdr *hdr)
-{
- 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;
- struct xfrm_userpolicy_id *policy_id;
- struct rtattr *rta;
- size_t rtasize;
- u_int32_t reqid = 0;
- policy_dir_t dir;
- job_t *job;
-
- policy_id = (struct xfrm_userpolicy_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;
- protocol_id_t proto;
-
- 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);
- proto = proto_kernel2ike(migrate->proto);
- reqid = migrate->reqid;
- DBG2(DBG_KNL, " migrate %N %H...%H to %H...%H, reqid {%u}",
- protocol_id_names, proto, 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)
- {
- DBG1(DBG_KNL, "creating migrate job for policy %R === %R %N with reqid {%u}",
- src_ts, dst_ts, policy_dir_names, dir, reqid, local);
- job = (job_t*)migrate_job_create(reqid, src_ts, dst_ts, dir,
- local, remote);
- charon->processor->queue_job(charon->processor, job);
- }
- 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)
-{
- job_t *job;
- u_int32_t spi, reqid;
- struct xfrm_user_mapping *mapping;
- host_t *host;
-
- mapping = (struct xfrm_user_mapping*)NLMSG_DATA(hdr);
- spi = mapping->id.spi;
- reqid = mapping->reqid;
-
- DBG2(DBG_KNL, "received a XFRM_MSG_MAPPING");
-
- if (proto_kernel2ike(mapping->id.proto) == PROTO_ESP)
- {
- host = xfrm2host(mapping->id.family, &mapping->new_saddr,
- mapping->new_sport);
- if (host)
- {
- DBG1(DBG_KNL, "NAT mappings of ESP CHILD_SA with SPI %.8x and "
- "reqid {%u} changed, queuing update job", ntohl(spi), reqid);
- job = (job_t*)update_sa_job_create(reqid, host);
- charon->processor->queue_job(charon->processor, job);
- }
- }
-}
-
-/**
- * Receives events from kernel
- */
-static job_requeue_t receive_events(private_kernel_netlink_ipsec_t *this)
-{
- char response[1024];
- struct nlmsghdr *hdr = (struct nlmsghdr*)response;
- struct sockaddr_nl addr;
- socklen_t addr_len = sizeof(addr);
- int len;
- bool oldstate;
-
- oldstate = thread_cancelability(TRUE);
- len = recvfrom(this->socket_xfrm_events, response, sizeof(response), 0,
- (struct sockaddr*)&addr, &addr_len);
- thread_cancelability(oldstate);
-
- if (len < 0)
- {
- switch (errno)
- {
- case EINTR:
- /* interrupted, try again */
- return JOB_REQUEUE_DIRECT;
- case EAGAIN:
- /* no data ready, select again */
- return JOB_REQUEUE_DIRECT;
- default:
- DBG1(DBG_KNL, "unable to receive from xfrm event socket");
- sleep(1);
- return JOB_REQUEUE_FAIR;
- }
- }
-
- if (addr.nl_pid != 0)
- { /* not from kernel. not interested, try another one */
- return JOB_REQUEUE_DIRECT;
- }
-
- 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 JOB_REQUEUE_DIRECT;
-}
-
-/**
- * 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 reqid, 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 = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST;
- hdr->nlmsg_type = XFRM_MSG_ALLOCSPI;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userspi_info));
-
- userspi = (struct xfrm_userspi_info*)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.reqid = reqid;
- 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;
-}
-
-/**
- * Implementation of kernel_interface_t.get_spi.
- */
-static status_t get_spi(private_kernel_netlink_ipsec_t *this,
- host_t *src, host_t *dst,
- protocol_id_t protocol, u_int32_t reqid,
- u_int32_t *spi)
-{
- DBG2(DBG_KNL, "getting SPI for reqid {%u}", reqid);
-
- if (get_spi_internal(this, src, dst, proto_ike2kernel(protocol),
- 0xc0000000, 0xcFFFFFFF, reqid, spi) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to get SPI for reqid {%u}", reqid);
- return FAILED;
- }
-
- DBG2(DBG_KNL, "got SPI %.8x for reqid {%u}", ntohl(*spi), reqid);
-
- return SUCCESS;
-}
-
-/**
- * Implementation of kernel_interface_t.get_cpi.
- */
-static status_t get_cpi(private_kernel_netlink_ipsec_t *this,
- host_t *src, host_t *dst,
- u_int32_t reqid, u_int16_t *cpi)
-{
- u_int32_t received_spi = 0;
-
- DBG2(DBG_KNL, "getting CPI for reqid {%u}", reqid);
-
- if (get_spi_internal(this, src, dst,
- IPPROTO_COMP, 0x100, 0xEFFF, reqid, &received_spi) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to get CPI for reqid {%u}", reqid);
- return FAILED;
- }
-
- *cpi = htons((u_int16_t)ntohl(received_spi));
-
- DBG2(DBG_KNL, "got CPI %.4x for reqid {%u}", ntohs(*cpi), reqid);
-
- return SUCCESS;
-}
-
-/**
- * Implementation of kernel_interface_t.add_sa.
- */
-static status_t add_sa(private_kernel_netlink_ipsec_t *this,
- host_t *src, host_t *dst, u_int32_t spi,
- protocol_id_t protocol, u_int32_t reqid,
- 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,
- bool encap, bool inbound,
- traffic_selector_t* src_ts, traffic_selector_t* dst_ts)
-{
- netlink_buf_t request;
- char *alg_name;
- struct nlmsghdr *hdr;
- struct xfrm_usersa_info *sa;
- u_int16_t icv_size = 64;
-
- /* 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, &lft,
- ENCR_UNDEFINED, chunk_empty, AUTH_UNDEFINED, chunk_empty,
- mode, ipcomp, 0, FALSE, inbound, NULL, NULL);
- 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}",
- ntohl(spi), reqid);
-
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- hdr->nlmsg_type = inbound ? XFRM_MSG_UPDSA : XFRM_MSG_NEWSA;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_info));
-
- sa = (struct xfrm_usersa_info*)NLMSG_DATA(hdr);
- host2xfrm(src, &sa->saddr);
- host2xfrm(dst, &sa->id.daddr);
- sa->id.spi = spi;
- sa->id.proto = proto_ike2kernel(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:
- if(src_ts && dst_ts)
- {
- sa->sel = ts2selector(src_ts, dst_ts);
- }
- break;
- default:
- break;
- }
-
- sa->replay_window = (protocol == IPPROTO_COMP) ? 0 : 32;
- 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;
-
- struct rtattr *rthdr = XFRM_RTA(hdr, struct xfrm_usersa_info);
-
- switch (enc_alg)
- {
- case ENCR_UNDEFINED:
- /* no encryption */
- break;
- case ENCR_AES_CCM_ICV16:
- case ENCR_AES_GCM_ICV16:
- case ENCR_CAMELLIA_CCM_ICV16:
- 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_algs, enc_alg);
- if (alg_name == NULL)
- {
- 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);
-
- rthdr->rta_type = XFRMA_ALG_AEAD;
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_algo_aead) + enc_key.len);
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- algo = (struct xfrm_algo_aead*)RTA_DATA(rthdr);
- algo->alg_key_len = enc_key.len * 8;
- algo->alg_icv_len = icv_size;
- strcpy(algo->alg_name, alg_name);
- memcpy(algo->alg_key, enc_key.ptr, enc_key.len);
-
- rthdr = XFRM_RTA_NEXT(rthdr);
- break;
- }
- default:
- {
- struct xfrm_algo *algo;
-
- alg_name = lookup_algorithm(encryption_algs, enc_alg);
- if (alg_name == NULL)
- {
- 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);
-
- rthdr->rta_type = XFRMA_ALG_CRYPT;
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_algo) + enc_key.len);
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- algo = (struct xfrm_algo*)RTA_DATA(rthdr);
- algo->alg_key_len = enc_key.len * 8;
- strcpy(algo->alg_name, alg_name);
- memcpy(algo->alg_key, enc_key.ptr, enc_key.len);
-
- rthdr = XFRM_RTA_NEXT(rthdr);
- }
- }
-
- if (int_alg != AUTH_UNDEFINED)
- {
- alg_name = lookup_algorithm(integrity_algs, int_alg);
- if (alg_name == NULL)
- {
- 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);
-
- if (int_alg == AUTH_HMAC_SHA2_256_128)
- {
- struct xfrm_algo_auth* algo;
-
- /* the kernel uses SHA256 with 96 bit truncation by default,
- * use specified truncation size supported by newer kernels */
- rthdr->rta_type = XFRMA_ALG_AUTH_TRUNC;
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_algo_auth) + int_key.len);
-
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- algo = (struct xfrm_algo_auth*)RTA_DATA(rthdr);
- algo->alg_key_len = int_key.len * 8;
- algo->alg_trunc_len = 128;
- strcpy(algo->alg_name, alg_name);
- memcpy(algo->alg_key, int_key.ptr, int_key.len);
- }
- else
- {
- struct xfrm_algo* algo;
-
- rthdr->rta_type = XFRMA_ALG_AUTH;
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_algo) + int_key.len);
-
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- algo = (struct xfrm_algo*)RTA_DATA(rthdr);
- algo->alg_key_len = int_key.len * 8;
- strcpy(algo->alg_name, alg_name);
- memcpy(algo->alg_key, int_key.ptr, int_key.len);
- }
- rthdr = XFRM_RTA_NEXT(rthdr);
- }
-
- if (ipcomp != IPCOMP_NONE)
- {
- rthdr->rta_type = XFRMA_ALG_COMP;
- alg_name = lookup_algorithm(compression_algs, ipcomp);
- if (alg_name == NULL)
- {
- DBG1(DBG_KNL, "algorithm %N not supported by kernel!",
- ipcomp_transform_names, ipcomp);
- return FAILED;
- }
- DBG2(DBG_KNL, " using compression algorithm %N",
- ipcomp_transform_names, ipcomp);
-
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_algo));
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- struct xfrm_algo* algo = (struct xfrm_algo*)RTA_DATA(rthdr);
- algo->alg_key_len = 0;
- strcpy(algo->alg_name, alg_name);
-
- rthdr = XFRM_RTA_NEXT(rthdr);
- }
-
- if (encap)
- {
- rthdr->rta_type = XFRMA_ENCAP;
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_encap_tmpl));
-
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- struct xfrm_encap_tmpl* tmpl = (struct xfrm_encap_tmpl*)RTA_DATA(rthdr);
- 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. */
- rthdr = XFRM_RTA_NEXT(rthdr);
- }
-
- if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to add SAD entry with SPI %.8x", ntohl(spi));
- return FAILED;
- }
- return SUCCESS;
-}
-
-/**
- * Get the replay state (i.e. sequence numbers) of an SA.
- */
-static status_t get_replay_state(private_kernel_netlink_ipsec_t *this,
- u_int32_t spi, protocol_id_t protocol, host_t *dst,
- struct xfrm_replay_state *replay)
-{
- 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 = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST;
- hdr->nlmsg_type = XFRM_MSG_GETAE;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
-
- aevent_id = (struct xfrm_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 = proto_ike2kernel(protocol);
- aevent_id->sa_id.family = dst->get_family(dst);
-
- 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 == NULL)
- {
- DBG1(DBG_KNL, "unable to query replay state from SAD entry with SPI %.8x",
- ntohl(spi));
- free(out);
- return FAILED;
- }
-
- 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_REPLAY_VAL &&
- RTA_PAYLOAD(rta) == sizeof(struct xfrm_replay_state))
- {
- memcpy(replay, RTA_DATA(rta), RTA_PAYLOAD(rta));
- free(out);
- return SUCCESS;
- }
- rta = RTA_NEXT(rta, rtasize);
- }
-
- DBG1(DBG_KNL, "unable to query replay state from SAD entry with SPI %.8x",
- ntohl(spi));
- free(out);
- return FAILED;
-}
-
-/**
- * Implementation of kernel_interface_t.query_sa.
- */
-static status_t query_sa(private_kernel_netlink_ipsec_t *this, host_t *src,
- host_t *dst, u_int32_t spi, protocol_id_t protocol,
- u_int64_t *bytes)
-{
- netlink_buf_t request;
- struct nlmsghdr *out = NULL, *hdr;
- struct xfrm_usersa_id *sa_id;
- struct xfrm_usersa_info *sa = NULL;
- size_t len;
-
- memset(&request, 0, sizeof(request));
-
- DBG2(DBG_KNL, "querying SAD entry with SPI %.8x", ntohl(spi));
-
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST;
- hdr->nlmsg_type = XFRM_MSG_GETSA;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_id));
-
- sa_id = (struct xfrm_usersa_id*)NLMSG_DATA(hdr);
- host2xfrm(dst, &sa_id->daddr);
- sa_id->spi = spi;
- sa_id->proto = proto_ike2kernel(protocol);
- sa_id->family = dst->get_family(dst);
-
- 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 = (struct xfrm_usersa_info*)NLMSG_DATA(hdr);
- break;
- }
- case NLMSG_ERROR:
- {
- struct nlmsgerr *err = NLMSG_DATA(hdr);
- 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));
- free(out);
- return FAILED;
- }
- *bytes = sa->curlft.bytes;
-
- free(out);
- return SUCCESS;
-}
-/**
- * Implementation of kernel_interface_t.del_sa.
- */
-static status_t del_sa(private_kernel_netlink_ipsec_t *this, host_t *src,
- host_t *dst, u_int32_t spi, protocol_id_t protocol,
- u_int16_t cpi)
-{
- 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);
- }
-
- memset(&request, 0, sizeof(request));
-
- DBG2(DBG_KNL, "deleting SAD entry with SPI %.8x", ntohl(spi));
-
- hdr = (struct nlmsghdr*)request;
- 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 = (struct xfrm_usersa_id*)NLMSG_DATA(hdr);
- host2xfrm(dst, &sa_id->daddr);
- sa_id->spi = spi;
- sa_id->proto = proto_ike2kernel(protocol);
- sa_id->family = dst->get_family(dst);
-
- if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to delete SAD entry with SPI %.8x", ntohl(spi));
- return FAILED;
- }
- DBG2(DBG_KNL, "deleted SAD entry with SPI %.8x", ntohl(spi));
- return SUCCESS;
-}
-
-/**
- * Implementation of kernel_interface_t.update_sa.
- */
-static status_t update_sa(private_kernel_netlink_ipsec_t *this,
- u_int32_t spi, protocol_id_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)
-{
- netlink_buf_t request;
- u_char *pos;
- 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;
- bool got_replay_state = FALSE;
- struct xfrm_replay_state replay;
-
- /* 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);
- }
-
- memset(&request, 0, sizeof(request));
-
- DBG2(DBG_KNL, "querying SAD entry with SPI %.8x for update", ntohl(spi));
-
- /* query the existing SA first */
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST;
- hdr->nlmsg_type = XFRM_MSG_GETSA;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_id));
-
- sa_id = (struct xfrm_usersa_id*)NLMSG_DATA(hdr);
- host2xfrm(dst, &sa_id->daddr);
- sa_id->spi = spi;
- sa_id->proto = proto_ike2kernel(protocol);
- sa_id->family = dst->get_family(dst);
-
- 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));
- free(out);
- return FAILED;
- }
-
- /* try to get the replay state */
- if (get_replay_state(this, spi, protocol, dst, &replay) == SUCCESS)
- {
- got_replay_state = TRUE;
- }
-
- /* delete the old SA (without affecting the IPComp SA) */
- if (del_sa(this, src, dst, spi, protocol, 0) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to delete old SAD entry with SPI %.8x", 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);
- /* copy over the SA from out to request */
- hdr = (struct nlmsghdr*)request;
- memcpy(hdr, out, min(out->nlmsg_len, sizeof(request)));
- 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);
- 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);
- pos = (u_char*)XFRM_RTA(hdr, 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 = (struct xfrm_encap_tmpl*)RTA_DATA(rta);
- tmpl->encap_sport = ntohs(new_src->get_port(new_src));
- tmpl->encap_dport = ntohs(new_dst->get_port(new_dst));
- }
- memcpy(pos, rta, rta->rta_len);
- pos += RTA_ALIGN(rta->rta_len);
- hdr->nlmsg_len += RTA_ALIGN(rta->rta_len);
- }
- rta = RTA_NEXT(rta, rtasize);
- }
-
- rta = (struct rtattr*)pos;
- if (tmpl == NULL && new_encap)
- { /* add tmpl if we are enabling it */
- rta->rta_type = XFRMA_ENCAP;
- rta->rta_len = RTA_LENGTH(sizeof(struct xfrm_encap_tmpl));
-
- hdr->nlmsg_len += rta->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- tmpl = (struct xfrm_encap_tmpl*)RTA_DATA(rta);
- 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));
-
- rta = XFRM_RTA_NEXT(rta);
- }
-
- if (got_replay_state)
- { /* copy the replay data if available */
- rta->rta_type = XFRMA_REPLAY_VAL;
- rta->rta_len = RTA_LENGTH(sizeof(struct xfrm_replay_state));
-
- hdr->nlmsg_len += rta->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
- memcpy(RTA_DATA(rta), &replay, sizeof(replay));
-
- rta = XFRM_RTA_NEXT(rta);
- }
-
- if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to update SAD entry with SPI %.8x", ntohl(spi));
- free(out);
- return FAILED;
- }
- free(out);
-
- return SUCCESS;
-}
-
-/**
- * Implementation of kernel_interface_t.add_policy.
- */
-static status_t add_policy(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, u_int32_t spi,
- protocol_id_t protocol, u_int32_t reqid,
- ipsec_mode_t mode, u_int16_t ipcomp, u_int16_t cpi,
- bool routed)
-{
- policy_entry_t *current, *policy;
- bool found = FALSE;
- netlink_buf_t request;
- struct xfrm_userpolicy_info *policy_info;
- struct nlmsghdr *hdr;
-
- /* create a policy */
- policy = malloc_thing(policy_entry_t);
- memset(policy, 0, sizeof(policy_entry_t));
- policy->sel = ts2selector(src_ts, dst_ts);
- policy->direction = direction;
-
- /* find the policy, which matches EXACTLY */
- this->mutex->lock(this->mutex);
- current = this->policies->get(this->policies, policy);
- if (current)
- {
- /* use existing policy */
- current->refcount++;
- DBG2(DBG_KNL, "policy %R === %R %N already exists, increasing "
- "refcount", src_ts, dst_ts,
- policy_dir_names, direction);
- free(policy);
- policy = current;
- found = TRUE;
- }
- else
- { /* apply the new one, if we have no such policy */
- this->policies->put(this->policies, policy, policy);
- policy->refcount = 1;
- }
-
- DBG2(DBG_KNL, "adding policy %R === %R %N", src_ts, dst_ts,
- policy_dir_names, direction);
-
- memset(&request, 0, sizeof(request));
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- hdr->nlmsg_type = found ? XFRM_MSG_UPDPOLICY : XFRM_MSG_NEWPOLICY;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userpolicy_info));
-
- policy_info = (struct xfrm_userpolicy_info*)NLMSG_DATA(hdr);
- policy_info->sel = policy->sel;
- policy_info->dir = policy->direction;
- /* calculate priority based on source selector size, small size = high prio */
- policy_info->priority = routed ? PRIO_LOW : PRIO_HIGH;
- policy_info->priority -= policy->sel.prefixlen_s * 10;
- policy_info->priority -= policy->sel.proto ? 2 : 0;
- policy_info->priority -= policy->sel.sport_mask ? 1 : 0;
- policy_info->action = XFRM_POLICY_ALLOW;
- policy_info->share = XFRM_SHARE_ANY;
- this->mutex->unlock(this->mutex);
-
- /* 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;
-
- struct rtattr *rthdr = XFRM_RTA(hdr, struct xfrm_userpolicy_info);
- rthdr->rta_type = XFRMA_TMPL;
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_user_tmpl));
-
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- struct xfrm_user_tmpl *tmpl = (struct xfrm_user_tmpl*)RTA_DATA(rthdr);
-
- if (ipcomp != IPCOMP_NONE)
- {
- tmpl->reqid = reqid;
- tmpl->id.proto = IPPROTO_COMP;
- tmpl->aalgos = tmpl->ealgos = tmpl->calgos = ~0;
- tmpl->mode = mode2kernel(mode);
- tmpl->optional = direction != POLICY_OUT;
- tmpl->family = src->get_family(src);
-
- host2xfrm(src, &tmpl->saddr);
- host2xfrm(dst, &tmpl->id.daddr);
-
- /* add an additional xfrm_user_tmpl */
- rthdr->rta_len += RTA_LENGTH(sizeof(struct xfrm_user_tmpl));
- hdr->nlmsg_len += RTA_LENGTH(sizeof(struct xfrm_user_tmpl));
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- tmpl++;
-
- /* use transport mode for ESP if we have a tunnel mode IPcomp SA */
- mode = MODE_TRANSPORT;
- }
- else
- {
- /* when using IPcomp, only the IPcomp SA uses tmp src/dst addresses */
- host2xfrm(src, &tmpl->saddr);
- host2xfrm(dst, &tmpl->id.daddr);
- }
-
- tmpl->reqid = reqid;
- tmpl->id.proto = proto_ike2kernel(protocol);
- tmpl->aalgos = tmpl->ealgos = tmpl->calgos = ~0;
- tmpl->mode = mode2kernel(mode);
- tmpl->family = src->get_family(src);
-
- if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to add policy %R === %R %N", src_ts, dst_ts,
- policy_dir_names, direction);
- return FAILED;
- }
-
- /* install a route, if:
- * - we are NOT updating a policy
- * - this is a forward policy (to just get one for each child)
- * - we are in tunnel/BEET mode
- * - routing is not disabled via strongswan.conf
- */
- if (policy->route == NULL && direction == POLICY_FWD &&
- mode != MODE_TRANSPORT && this->install_routes)
- {
- route_entry_t *route = malloc_thing(route_entry_t);
-
- if (charon->kernel_interface->get_address_by_ts(charon->kernel_interface,
- dst_ts, &route->src_ip) == SUCCESS)
- {
- /* get the nexthop to src (src as we are in POLICY_FWD).*/
- route->gateway = charon->kernel_interface->get_nexthop(
- charon->kernel_interface, src);
- /* install route via outgoing interface */
- route->if_name = charon->kernel_interface->get_interface(
- charon->kernel_interface, dst);
- route->dst_net = chunk_alloc(policy->sel.family == AF_INET ? 4 : 16);
- memcpy(route->dst_net.ptr, &policy->sel.saddr, route->dst_net.len);
- route->prefixlen = policy->sel.prefixlen_s;
-
- if (route->if_name)
- {
- switch (charon->kernel_interface->add_route(
- charon->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
- {
- route_entry_destroy(route);
- }
- }
- else
- {
- free(route);
- }
- }
- return SUCCESS;
-}
-
-/**
- * Implementation of kernel_interface_t.query_policy.
- */
-static status_t query_policy(private_kernel_netlink_ipsec_t *this,
- traffic_selector_t *src_ts,
- traffic_selector_t *dst_ts,
- policy_dir_t direction, u_int32_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", src_ts, dst_ts,
- policy_dir_names, direction);
-
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST;
- hdr->nlmsg_type = XFRM_MSG_GETPOLICY;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userpolicy_id));
-
- policy_id = (struct xfrm_userpolicy_id*)NLMSG_DATA(hdr);
- policy_id->sel = ts2selector(src_ts, dst_ts);
- policy_id->dir = direction;
-
- 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 = (struct xfrm_userpolicy_info*)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;
-}
-
-/**
- * Implementation of kernel_interface_t.del_policy.
- */
-static status_t del_policy(private_kernel_netlink_ipsec_t *this,
- traffic_selector_t *src_ts,
- traffic_selector_t *dst_ts,
- policy_dir_t direction, bool unrouted)
-{
- policy_entry_t *current, policy, *to_delete = NULL;
- route_entry_t *route;
- netlink_buf_t request;
- struct nlmsghdr *hdr;
- struct xfrm_userpolicy_id *policy_id;
-
- DBG2(DBG_KNL, "deleting policy %R === %R %N", src_ts, dst_ts,
- policy_dir_names, direction);
-
- /* create a policy */
- memset(&policy, 0, sizeof(policy_entry_t));
- policy.sel = ts2selector(src_ts, dst_ts);
- policy.direction = direction;
-
- /* find the policy */
- this->mutex->lock(this->mutex);
- current = this->policies->get(this->policies, &policy);
- if (current)
- {
- to_delete = current;
- if (--to_delete->refcount > 0)
- {
- /* is used by more SAs, keep in kernel */
- DBG2(DBG_KNL, "policy still used by another CHILD_SA, not removed");
- this->mutex->unlock(this->mutex);
- return SUCCESS;
- }
- /* remove if last reference */
- this->policies->remove(this->policies, to_delete);
- }
- this->mutex->unlock(this->mutex);
- if (!to_delete)
- {
- DBG1(DBG_KNL, "deleting policy %R === %R %N failed, not found", src_ts,
- dst_ts, policy_dir_names, direction);
- return NOT_FOUND;
- }
-
- memset(&request, 0, sizeof(request));
-
- hdr = (struct nlmsghdr*)request;
- 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 = (struct xfrm_userpolicy_id*)NLMSG_DATA(hdr);
- policy_id->sel = to_delete->sel;
- policy_id->dir = direction;
-
- route = to_delete->route;
- free(to_delete);
-
- if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to delete policy %R === %R %N", src_ts, dst_ts,
- policy_dir_names, direction);
- return FAILED;
- }
-
- if (route)
- {
- if (charon->kernel_interface->del_route(charon->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);
- }
- route_entry_destroy(route);
- }
- return SUCCESS;
-}
-
-/**
- * Implementation of kernel_interface_t.destroy.
- */
-static void destroy(private_kernel_netlink_ipsec_t *this)
-{
- enumerator_t *enumerator;
- policy_entry_t *policy;
-
- this->job->cancel(this->job);
- close(this->socket_xfrm_events);
- this->socket_xfrm->destroy(this->socket_xfrm);
- enumerator = this->policies->create_enumerator(this->policies);
- while (enumerator->enumerate(enumerator, &policy, &policy))
- {
- free(policy);
- }
- enumerator->destroy(enumerator);
- this->policies->destroy(this->policies);
- this->mutex->destroy(this->mutex);
- free(this);
-}
-
-/**
- * Add bypass policies for IKE on the sockets used by charon
- */
-static bool add_bypass_policies()
-{
- int fd, family, port;
- enumerator_t *sockets;
- bool status = TRUE;
-
- sockets = charon->socket->create_enumerator(charon->socket);
- while (sockets->enumerate(sockets, &fd, &family, &port))
- {
- 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:
- continue;
- }
-
- 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));
- status = FALSE;
- break;
- }
- 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));
- status = FALSE;
- break;
- }
- }
- sockets->destroy(sockets);
- return status;
-}
-
-/*
- * Described in header.
- */
-kernel_netlink_ipsec_t *kernel_netlink_ipsec_create()
-{
- private_kernel_netlink_ipsec_t *this = malloc_thing(private_kernel_netlink_ipsec_t);
- struct sockaddr_nl addr;
- int fd;
-
- /* public functions */
- this->public.interface.get_spi = (status_t(*)(kernel_ipsec_t*,host_t*,host_t*,protocol_id_t,u_int32_t,u_int32_t*))get_spi;
- this->public.interface.get_cpi = (status_t(*)(kernel_ipsec_t*,host_t*,host_t*,u_int32_t,u_int16_t*))get_cpi;
- this->public.interface.add_sa = (status_t(*)(kernel_ipsec_t *,host_t*,host_t*,u_int32_t,protocol_id_t,u_int32_t,lifetime_cfg_t*,u_int16_t,chunk_t,u_int16_t,chunk_t,ipsec_mode_t,u_int16_t,u_int16_t,bool,bool,traffic_selector_t*,traffic_selector_t*))add_sa;
- this->public.interface.update_sa = (status_t(*)(kernel_ipsec_t*,u_int32_t,protocol_id_t,u_int16_t,host_t*,host_t*,host_t*,host_t*,bool,bool))update_sa;
- this->public.interface.query_sa = (status_t(*)(kernel_ipsec_t*,host_t*,host_t*,u_int32_t,protocol_id_t,u_int64_t*))query_sa;
- this->public.interface.del_sa = (status_t(*)(kernel_ipsec_t*,host_t*,host_t*,u_int32_t,protocol_id_t,u_int16_t))del_sa;
- this->public.interface.add_policy = (status_t(*)(kernel_ipsec_t*,host_t*,host_t*,traffic_selector_t*,traffic_selector_t*,policy_dir_t,u_int32_t,protocol_id_t,u_int32_t,ipsec_mode_t,u_int16_t,u_int16_t,bool))add_policy;
- this->public.interface.query_policy = (status_t(*)(kernel_ipsec_t*,traffic_selector_t*,traffic_selector_t*,policy_dir_t,u_int32_t*))query_policy;
- this->public.interface.del_policy = (status_t(*)(kernel_ipsec_t*,traffic_selector_t*,traffic_selector_t*,policy_dir_t,bool))del_policy;
- this->public.interface.destroy = (void(*)(kernel_ipsec_t*)) destroy;
-
- /* private members */
- this->policies = hashtable_create((hashtable_hash_t)policy_hash,
- (hashtable_equals_t)policy_equals, 32);
- this->mutex = mutex_create(MUTEX_TYPE_DEFAULT);
- this->install_routes = lib->settings->get_bool(lib->settings,
- "charon.install_routes", TRUE);
-
- /* disable lifetimes for allocated SPIs in kernel */
- fd = open("/proc/sys/net/core/xfrm_acq_expires", O_WRONLY);
- if (fd)
- {
- ignore_result(write(fd, "165", 3));
- close(fd);
- }
-
- this->socket_xfrm = netlink_socket_create(NETLINK_XFRM);
-
- 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)
- {
- charon->kill(charon, "unable to create XFRM event socket");
- }
- addr.nl_groups = XFRMNLGRP(ACQUIRE) | XFRMNLGRP(EXPIRE) |
- XFRMNLGRP(MIGRATE) | XFRMNLGRP(MAPPING);
- if (bind(this->socket_xfrm_events, (struct sockaddr*)&addr, sizeof(addr)))
- {
- charon->kill(charon, "unable to bind XFRM event socket");
- }
-
- /* add bypass policies on the sockets used by charon */
- if (!add_bypass_policies())
- {
- charon->kill(charon, "unable to add bypass policies on sockets");
- }
-
- this->job = callback_job_create((callback_job_cb_t)receive_events,
- this, NULL, NULL);
- charon->processor->queue_job(charon->processor, (job_t*)this->job);
-
- return &this->public;
-}
diff --git a/src/charon/plugins/kernel_netlink/kernel_netlink_ipsec.h b/src/charon/plugins/kernel_netlink/kernel_netlink_ipsec.h
deleted file mode 100644
index 3a45cce06..000000000
--- a/src/charon/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/charon/plugins/kernel_netlink/kernel_netlink_net.c b/src/charon/plugins/kernel_netlink/kernel_netlink_net.c
deleted file mode 100644
index 4a9fdf69a..000000000
--- a/src/charon/plugins/kernel_netlink/kernel_netlink_net.c
+++ /dev/null
@@ -1,1424 +0,0 @@
-/*
- * Copyright (C) 2008 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.
- */
-
-#include <sys/socket.h>
-#include <linux/netlink.h>
-#include <linux/rtnetlink.h>
-#include <unistd.h>
-#include <errno.h>
-#include <net/if.h>
-
-#include "kernel_netlink_net.h"
-#include "kernel_netlink_shared.h"
-
-#include <daemon.h>
-#include <threading/thread.h>
-#include <threading/condvar.h>
-#include <threading/mutex.h>
-#include <utils/linked_list.h>
-#include <processing/jobs/callback_job.h>
-#include <processing/jobs/roam_job.h>
-
-/** delay before firing roam jobs (ms) */
-#define ROAM_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;
-
- /** scope of the address */
- u_char scope;
-
- /** Number of times this IP is used, if virtual */
- u_int refcount;
-};
-
-/**
- * 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;
-};
-
-/**
- * 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);
-}
-
-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;
-
- /**
- * mutex to lock access to various lists
- */
- mutex_t *mutex;
-
- /**
- * condition variable to signal virtual IP add/removal
- */
- condvar_t *condvar;
-
- /**
- * Cached list of interfaces and its addresses (iface_entry_t)
- */
- linked_list_t *ifaces;
-
- /**
- * job receiving netlink events
- */
- callback_job_t *job;
-
- /**
- * netlink rt socket (routing)
- */
- netlink_socket_t *socket;
-
- /**
- * Netlink rt socket to receive address change events
- */
- int socket_events;
-
- /**
- * time of the last roam_job
- */
- timeval_t last_roam;
-
- /**
- * routing table to install routes
- */
- int routing_table;
-
- /**
- * priority of used routing table
- */
- int routing_table_prio;
-
- /**
- * whether to react to RTM_NEWROUTE or RTM_DELROUTE events
- */
- bool process_route;
-
- /**
- * whether to actually install virtual IPs
- */
- bool install_virtual_ip;
-};
-
-/**
- * get the refcount of a virtual ip
- */
-static int get_vip_refcount(private_kernel_netlink_net_t *this, host_t* ip)
-{
- iterator_t *ifaces, *addrs;
- iface_entry_t *iface;
- addr_entry_t *addr;
- int refcount = 0;
-
- ifaces = this->ifaces->create_iterator(this->ifaces, TRUE);
- while (ifaces->iterate(ifaces, (void**)&iface))
- {
- addrs = iface->addrs->create_iterator(iface->addrs, TRUE);
- while (addrs->iterate(addrs, (void**)&addr))
- {
- if (addr->virtual && (iface->flags & IFF_UP) &&
- ip->ip_equals(ip, addr->ip))
- {
- refcount = addr->refcount;
- break;
- }
- }
- addrs->destroy(addrs);
- if (refcount)
- {
- break;
- }
- }
- ifaces->destroy(ifaces);
-
- return refcount;
-}
-
-/**
- * start a roaming job. We delay it for a second and fire only one job
- * for multiple events. Otherwise we would create two many jobs.
- */
-static void fire_roam_job(private_kernel_netlink_net_t *this, bool address)
-{
- timeval_t now;
-
- time_monotonic(&now);
- if (timercmp(&now, &this->last_roam, >))
- {
- now.tv_usec += ROAM_DELAY * 1000;
- while (now.tv_usec > 1000000)
- {
- now.tv_sec++;
- now.tv_usec -= 1000000;
- }
- this->last_roam = now;
- charon->scheduler->schedule_job_ms(charon->scheduler,
- (job_t*)roam_job_create(address), ROAM_DELAY);
- }
-}
-
-/**
- * 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 = (struct ifinfomsg*)(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;
-
- 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->mutex->lock(this->mutex);
- switch (hdr->nlmsg_type)
- {
- case RTM_NEWLINK:
- {
- if (msg->ifi_flags & IFF_LOOPBACK)
- { /* ignore loopback interfaces */
- break;
- }
- enumerator = this->ifaces->create_enumerator(this->ifaces);
- while (enumerator->enumerate(enumerator, &current))
- {
- if (current->ifindex == msg->ifi_index)
- {
- entry = current;
- break;
- }
- }
- enumerator->destroy(enumerator);
- if (!entry)
- {
- entry = malloc_thing(iface_entry_t);
- entry->ifindex = msg->ifi_index;
- entry->flags = 0;
- entry->addrs = linked_list_create();
- this->ifaces->insert_last(this->ifaces, entry);
- }
- memcpy(entry->ifname, name, IFNAMSIZ);
- entry->ifname[IFNAMSIZ-1] = '\0';
- if (event)
- {
- if (!(entry->flags & IFF_UP) && (msg->ifi_flags & IFF_UP))
- {
- update = 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, &current))
- {
- if (current->ifindex == msg->ifi_index)
- {
- /* we do not remove it, as an address may be added to a
- * "down" interface and we wan't to know that. */
- current->flags = msg->ifi_flags;
- break;
- }
- }
- enumerator->destroy(enumerator);
- break;
- }
- }
- this->mutex->unlock(this->mutex);
-
- /* send an update to all IKE_SAs */
- if (update && event)
- {
- fire_roam_job(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 = (struct ifaddrmsg*)(NLMSG_DATA(hdr));
- struct rtattr *rta = IFA_RTA(msg);
- size_t rtasize = IFA_PAYLOAD (hdr);
- host_t *host = NULL;
- enumerator_t *ifaces, *addrs;
- iface_entry_t *iface;
- addr_entry_t *addr;
- chunk_t local = chunk_empty, address = chunk_empty;
- 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->mutex->lock(this->mutex);
- ifaces = this->ifaces->create_enumerator(this->ifaces);
- while (ifaces->enumerate(ifaces, &iface))
- {
- if (iface->ifindex == msg->ifa_index)
- {
- addrs = iface->addrs->create_enumerator(iface->addrs);
- while (addrs->enumerate(addrs, &addr))
- {
- if (host->ip_equals(host, addr->ip))
- {
- found = TRUE;
- if (hdr->nlmsg_type == RTM_DELADDR)
- {
- iface->addrs->remove_at(iface->addrs, addrs);
- if (!addr->virtual)
- {
- changed = TRUE;
- DBG1(DBG_KNL, "%H disappeared from %s",
- host, iface->ifname);
- }
- addr_entry_destroy(addr);
- }
- else if (hdr->nlmsg_type == RTM_NEWADDR && addr->virtual)
- {
- addr->refcount = 1;
- }
- }
- }
- addrs->destroy(addrs);
-
- if (hdr->nlmsg_type == RTM_NEWADDR)
- {
- if (!found)
- {
- found = TRUE;
- changed = TRUE;
- addr = malloc_thing(addr_entry_t);
- addr->ip = host->clone(host);
- addr->virtual = FALSE;
- addr->refcount = 1;
- addr->scope = msg->ifa_scope;
-
- iface->addrs->insert_last(iface->addrs, addr);
- if (event)
- {
- DBG1(DBG_KNL, "%H appeared on %s", host, iface->ifname);
- }
- }
- }
- if (found && (iface->flags & IFF_UP))
- {
- update = TRUE;
- }
- break;
- }
- }
- ifaces->destroy(ifaces);
- this->mutex->unlock(this->mutex);
- host->destroy(host);
-
- /* send an update to all IKE_SAs */
- if (update && event && changed)
- {
- fire_roam_job(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 = (struct rtmsg*)(NLMSG_DATA(hdr));
- struct rtattr *rta = RTM_RTA(msg);
- size_t rtasize = RTM_PAYLOAD(hdr);
- host_t *host = NULL;
-
- /* ignore routes added by us */
- if (msg->rtm_table && msg->rtm_table == this->routing_table)
- {
- return;
- }
-
- while (RTA_OK(rta, rtasize))
- {
- switch (rta->rta_type)
- {
- case RTA_PREFSRC:
- host = host_create_from_chunk(msg->rtm_family,
- chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta)), 0);
- break;
- }
- rta = RTA_NEXT(rta, rtasize);
- }
- if (host)
- {
- this->mutex->lock(this->mutex);
- if (!get_vip_refcount(this, host))
- { /* ignore routes added for virtual IPs */
- fire_roam_job(this, FALSE);
- }
- this->mutex->unlock(this->mutex);
- host->destroy(host);
- }
-}
-
-/**
- * Receives events from kernel
- */
-static job_requeue_t receive_events(private_kernel_netlink_net_t *this)
-{
- char response[1024];
- struct nlmsghdr *hdr = (struct nlmsghdr*)response;
- struct sockaddr_nl addr;
- socklen_t addr_len = sizeof(addr);
- int len;
- bool oldstate;
-
- oldstate = thread_cancelability(TRUE);
- len = recvfrom(this->socket_events, response, sizeof(response), 0,
- (struct sockaddr*)&addr, &addr_len);
- thread_cancelability(oldstate);
-
- if (len < 0)
- {
- switch (errno)
- {
- case EINTR:
- /* interrupted, try again */
- return JOB_REQUEUE_DIRECT;
- case EAGAIN:
- /* no data ready, select again */
- return JOB_REQUEUE_DIRECT;
- default:
- DBG1(DBG_KNL, "unable to receive from rt event socket");
- sleep(1);
- return JOB_REQUEUE_FAIR;
- }
- }
-
- if (addr.nl_pid != 0)
- { /* not from kernel. not interested, try another one */
- return JOB_REQUEUE_DIRECT;
- }
-
- 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);
- this->condvar->broadcast(this->condvar);
- break;
- case RTM_NEWLINK:
- case RTM_DELLINK:
- process_link(this, hdr, TRUE);
- this->condvar->broadcast(this->condvar);
- break;
- case RTM_NEWROUTE:
- case RTM_DELROUTE:
- if (this->process_route)
- {
- process_route(this, hdr);
- }
- break;
- default:
- break;
- }
- hdr = NLMSG_NEXT(hdr, len);
- }
- return JOB_REQUEUE_DIRECT;
-}
-
-/** enumerator over addresses */
-typedef struct {
- private_kernel_netlink_net_t* this;
- /** whether to enumerate down interfaces */
- bool include_down_ifaces;
- /** whether to enumerate virtual ip addresses */
- bool include_virtual_ips;
-} address_enumerator_t;
-
-/**
- * cleanup function for address enumerator
- */
-static void address_enumerator_destroy(address_enumerator_t *data)
-{
- data->this->mutex->unlock(data->this->mutex);
- free(data);
-}
-
-/**
- * filter for addresses
- */
-static bool filter_addresses(address_enumerator_t *data, addr_entry_t** in, host_t** out)
-{
- if (!data->include_virtual_ips && (*in)->virtual)
- { /* skip virtual interfaces added by us */
- 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->include_down_ifaces && !((*in)->flags & IFF_UP))
- { /* skip interfaces not up */
- return FALSE;
- }
- *out = *in;
- return TRUE;
-}
-
-/**
- * implementation of kernel_net_t.create_address_enumerator
- */
-static enumerator_t *create_address_enumerator(private_kernel_netlink_net_t *this,
- bool include_down_ifaces, bool include_virtual_ips)
-{
- address_enumerator_t *data = malloc_thing(address_enumerator_t);
- data->this = this;
- data->include_down_ifaces = include_down_ifaces;
- data->include_virtual_ips = include_virtual_ips;
-
- this->mutex->lock(this->mutex);
- 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);
-}
-
-/**
- * implementation of kernel_net_t.get_interface_name
- */
-static char *get_interface_name(private_kernel_netlink_net_t *this, host_t* ip)
-{
- enumerator_t *ifaces, *addrs;
- iface_entry_t *iface;
- addr_entry_t *addr;
- char *name = NULL;
-
- DBG2(DBG_KNL, "getting interface name for %H", ip);
-
- this->mutex->lock(this->mutex);
- ifaces = this->ifaces->create_enumerator(this->ifaces);
- while (ifaces->enumerate(ifaces, &iface))
- {
- addrs = iface->addrs->create_enumerator(iface->addrs);
- while (addrs->enumerate(addrs, &addr))
- {
- if (ip->ip_equals(ip, addr->ip))
- {
- name = strdup(iface->ifname);
- break;
- }
- }
- addrs->destroy(addrs);
- if (name)
- {
- break;
- }
- }
- ifaces->destroy(ifaces);
- this->mutex->unlock(this->mutex);
-
- if (name)
- {
- DBG2(DBG_KNL, "%H is on interface %s", ip, name);
- }
- else
- {
- DBG2(DBG_KNL, "%H is not a local address", ip);
- }
- return name;
-}
-
-/**
- * get the index of an interface by name
- */
-static int get_interface_index(private_kernel_netlink_net_t *this, char* name)
-{
- enumerator_t *ifaces;
- iface_entry_t *iface;
- int ifindex = 0;
-
- DBG2(DBG_KNL, "getting iface index for %s", name);
-
- this->mutex->lock(this->mutex);
- ifaces = this->ifaces->create_enumerator(this->ifaces);
- while (ifaces->enumerate(ifaces, &iface))
- {
- if (streq(name, iface->ifname))
- {
- ifindex = iface->ifindex;
- break;
- }
- }
- ifaces->destroy(ifaces);
- this->mutex->unlock(this->mutex);
-
- if (ifindex == 0)
- {
- DBG1(DBG_KNL, "unable to get interface index for %s", name);
- }
- return ifindex;
-}
-
-/**
- * Check if an interface with a given index is up
- */
-static bool is_interface_up(private_kernel_netlink_net_t *this, int index)
-{
- enumerator_t *ifaces;
- iface_entry_t *iface;
- /* default to TRUE for interface we do not monitor (e.g. lo) */
- bool up = TRUE;
-
- ifaces = this->ifaces->create_enumerator(this->ifaces);
- while (ifaces->enumerate(ifaces, &iface))
- {
- if (iface->ifindex == index)
- {
- up = iface->flags & IFF_UP;
- break;
- }
- }
- ifaces->destroy(ifaces);
- return up;
-}
-
-/**
- * check if an address (chunk) addr is in subnet (net with net_len net bits)
- */
-static bool addr_in_subnet(chunk_t addr, 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 )
- {
- 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;
-}
-
-/**
- * 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,
- bool nexthop, host_t *candidate)
-{
- netlink_buf_t request;
- struct nlmsghdr *hdr, *out, *current;
- struct rtmsg *msg;
- chunk_t chunk;
- size_t len;
- int best = -1;
- host_t *src = NULL, *gtw = NULL;
-
- DBG2(DBG_KNL, "getting address to reach %H", dest);
-
- memset(&request, 0, sizeof(request));
-
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST;
- if (dest->get_family(dest) == AF_INET)
- {
- /* We dump all addresses for IPv4, as we want to ignore IPsec specific
- * routes installed by us. But the kernel does not return source
- * addresses in a IPv6 dump, so fall back to get() for v6 routes. */
- hdr->nlmsg_flags |= NLM_F_ROOT | NLM_F_DUMP;
- }
- hdr->nlmsg_type = RTM_GETROUTE;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
-
- msg = (struct rtmsg*)NLMSG_DATA(hdr);
- msg->rtm_family = dest->get_family(dest);
- if (candidate)
- {
- chunk = candidate->get_address(candidate);
- netlink_add_attribute(hdr, RTA_PREFSRC, chunk, sizeof(request));
- }
- chunk = dest->get_address(dest);
- netlink_add_attribute(hdr, RTA_DST, chunk, sizeof(request));
-
- if (this->socket->send(this->socket, hdr, &out, &len) != SUCCESS)
- {
- DBG1(DBG_KNL, "getting address to %H failed", dest);
- return NULL;
- }
- this->mutex->lock(this->mutex);
-
- for (current = out; NLMSG_OK(current, len);
- current = NLMSG_NEXT(current, len))
- {
- switch (current->nlmsg_type)
- {
- case NLMSG_DONE:
- break;
- case RTM_NEWROUTE:
- {
- struct rtattr *rta;
- size_t rtasize;
- chunk_t rta_gtw, rta_src, rta_dst;
- u_int32_t rta_oif = 0;
- host_t *new_src, *new_gtw;
-
- rta_gtw = rta_src = rta_dst = chunk_empty;
- msg = (struct rtmsg*)(NLMSG_DATA(current));
- rta = RTM_RTA(msg);
- rtasize = RTM_PAYLOAD(current);
- while (RTA_OK(rta, rtasize))
- {
- switch (rta->rta_type)
- {
- case RTA_PREFSRC:
- rta_src = chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta));
- break;
- case RTA_GATEWAY:
- rta_gtw = chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta));
- break;
- case RTA_DST:
- rta_dst = chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta));
- 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);
- }
- if (msg->rtm_dst_len <= best)
- { /* not better than a previous one */
- continue;
- }
- if (this->routing_table != 0 &&
- msg->rtm_table == this->routing_table)
- { /* route is from our own ipsec routing table */
- continue;
- }
- if (rta_oif && !is_interface_up(this, rta_oif))
- { /* interface is down */
- continue;
- }
- if (!addr_in_subnet(chunk, rta_dst, msg->rtm_dst_len))
- { /* route destination does not contain dest */
- continue;
- }
-
- if (nexthop)
- {
- /* nexthop lookup, return gateway if any */
- DESTROY_IF(gtw);
- gtw = host_create_from_chunk(msg->rtm_family, rta_gtw, 0);
- best = msg->rtm_dst_len;
- continue;
- }
- if (rta_src.ptr)
- {
- /* got a source address */
- new_src = host_create_from_chunk(msg->rtm_family, rta_src, 0);
- if (new_src)
- {
- if (get_vip_refcount(this, new_src))
- { /* skip source address if it is installed by us */
- new_src->destroy(new_src);
- }
- else
- {
- DESTROY_IF(src);
- src = new_src;
- best = msg->rtm_dst_len;
- }
- }
- continue;
- }
- if (rta_gtw.ptr)
- { /* no source, but a gateway. Lookup source to reach gtw. */
- new_gtw = host_create_from_chunk(msg->rtm_family, rta_gtw, 0);
- new_src = get_route(this, new_gtw, FALSE, candidate);
- new_gtw->destroy(new_gtw);
- if (new_src)
- {
- DESTROY_IF(src);
- src = new_src;
- best = msg->rtm_dst_len;
- }
- continue;
- }
- continue;
- }
- default:
- continue;
- }
- break;
- }
- free(out);
- this->mutex->unlock(this->mutex);
-
- if (nexthop)
- {
- if (gtw)
- {
- return gtw;
- }
- return dest->clone(dest);
- }
- return src;
-}
-
-/**
- * Implementation of kernel_net_t.get_source_addr.
- */
-static host_t* get_source_addr(private_kernel_netlink_net_t *this,
- host_t *dest, host_t *src)
-{
- return get_route(this, dest, FALSE, src);
-}
-
-/**
- * Implementation of kernel_net_t.get_nexthop.
- */
-static host_t* get_nexthop(private_kernel_netlink_net_t *this, host_t *dest)
-{
- return get_route(this, dest, TRUE, NULL);
-}
-
-/**
- * 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)
-{
- netlink_buf_t request;
- struct nlmsghdr *hdr;
- struct ifaddrmsg *msg;
- chunk_t chunk;
-
- memset(&request, 0, sizeof(request));
-
- chunk = ip->get_address(ip);
-
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags;
- hdr->nlmsg_type = nlmsg_type;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
-
- msg = (struct ifaddrmsg*)NLMSG_DATA(hdr);
- msg->ifa_family = ip->get_family(ip);
- msg->ifa_flags = 0;
- msg->ifa_prefixlen = 8 * chunk.len;
- msg->ifa_scope = RT_SCOPE_UNIVERSE;
- msg->ifa_index = if_index;
-
- netlink_add_attribute(hdr, IFA_LOCAL, chunk, sizeof(request));
-
- return this->socket->send_ack(this->socket, hdr);
-}
-
-/**
- * Implementation of kernel_net_t.add_ip.
- */
-static status_t add_ip(private_kernel_netlink_net_t *this,
- host_t *virtual_ip, host_t *iface_ip)
-{
- iface_entry_t *iface;
- addr_entry_t *addr;
- enumerator_t *addrs, *ifaces;
- int ifindex;
-
- if (!this->install_virtual_ip)
- { /* disabled by config */
- return SUCCESS;
- }
-
- DBG2(DBG_KNL, "adding virtual IP %H", virtual_ip);
-
- this->mutex->lock(this->mutex);
- ifaces = this->ifaces->create_enumerator(this->ifaces);
- while (ifaces->enumerate(ifaces, &iface))
- {
- bool iface_found = FALSE;
-
- addrs = iface->addrs->create_enumerator(iface->addrs);
- while (addrs->enumerate(addrs, &addr))
- {
- if (iface_ip->ip_equals(iface_ip, addr->ip))
- {
- iface_found = TRUE;
- }
- else if (virtual_ip->ip_equals(virtual_ip, addr->ip))
- {
- addr->refcount++;
- DBG2(DBG_KNL, "virtual IP %H already installed on %s",
- virtual_ip, iface->ifname);
- addrs->destroy(addrs);
- ifaces->destroy(ifaces);
- this->mutex->unlock(this->mutex);
- return SUCCESS;
- }
- }
- addrs->destroy(addrs);
-
- if (iface_found)
- {
- ifindex = iface->ifindex;
- addr = malloc_thing(addr_entry_t);
- addr->ip = virtual_ip->clone(virtual_ip);
- addr->refcount = 0;
- addr->virtual = TRUE;
- addr->scope = RT_SCOPE_UNIVERSE;
- iface->addrs->insert_last(iface->addrs, addr);
-
- if (manage_ipaddr(this, RTM_NEWADDR, NLM_F_CREATE | NLM_F_EXCL,
- ifindex, virtual_ip) == SUCCESS)
- {
- while (get_vip_refcount(this, virtual_ip) == 0)
- { /* wait until address appears */
- this->condvar->wait(this->condvar, this->mutex);
- }
- ifaces->destroy(ifaces);
- this->mutex->unlock(this->mutex);
- return SUCCESS;
- }
- ifaces->destroy(ifaces);
- this->mutex->unlock(this->mutex);
- DBG1(DBG_KNL, "adding virtual IP %H failed", virtual_ip);
- return FAILED;
- }
- }
- ifaces->destroy(ifaces);
- this->mutex->unlock(this->mutex);
-
- DBG1(DBG_KNL, "interface address %H not found, unable to install"
- "virtual IP %H", iface_ip, virtual_ip);
- return FAILED;
-}
-
-/**
- * Implementation of kernel_net_t.del_ip.
- */
-static status_t del_ip(private_kernel_netlink_net_t *this, host_t *virtual_ip)
-{
- iface_entry_t *iface;
- addr_entry_t *addr;
- enumerator_t *addrs, *ifaces;
- status_t status;
- int ifindex;
-
- if (!this->install_virtual_ip)
- { /* disabled by config */
- return SUCCESS;
- }
-
- DBG2(DBG_KNL, "deleting virtual IP %H", virtual_ip);
-
- this->mutex->lock(this->mutex);
- ifaces = this->ifaces->create_enumerator(this->ifaces);
- while (ifaces->enumerate(ifaces, &iface))
- {
- addrs = iface->addrs->create_enumerator(iface->addrs);
- while (addrs->enumerate(addrs, &addr))
- {
- if (virtual_ip->ip_equals(virtual_ip, addr->ip))
- {
- ifindex = iface->ifindex;
- if (addr->refcount == 1)
- {
- status = manage_ipaddr(this, RTM_DELADDR, 0,
- ifindex, virtual_ip);
- if (status == SUCCESS)
- { /* wait until the address is really gone */
- while (get_vip_refcount(this, virtual_ip) > 0)
- {
- this->condvar->wait(this->condvar, this->mutex);
- }
- }
- addrs->destroy(addrs);
- ifaces->destroy(ifaces);
- this->mutex->unlock(this->mutex);
- return status;
- }
- else
- {
- addr->refcount--;
- }
- DBG2(DBG_KNL, "virtual IP %H used by other SAs, not deleting",
- virtual_ip);
- addrs->destroy(addrs);
- ifaces->destroy(ifaces);
- this->mutex->unlock(this->mutex);
- return SUCCESS;
- }
- }
- addrs->destroy(addrs);
- }
- ifaces->destroy(ifaces);
- this->mutex->unlock(this->mutex);
-
- DBG2(DBG_KNL, "virtual IP %H not cached, unable to delete", virtual_ip);
- return FAILED;
-}
-
-/**
- * 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;
- 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 = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags;
- hdr->nlmsg_type = nlmsg_type;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
-
- msg = (struct rtmsg*)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));
-
- return this->socket->send_ack(this->socket, hdr);
-}
-
-/**
- * Implementation of kernel_net_t.add_route.
- */
-static status_t add_route(private_kernel_netlink_net_t *this, chunk_t dst_net,
- u_int8_t prefixlen, host_t *gateway, host_t *src_ip, char *if_name)
-{
- return manage_srcroute(this, RTM_NEWROUTE, NLM_F_CREATE | NLM_F_EXCL,
- dst_net, prefixlen, gateway, src_ip, if_name);
-}
-
-/**
- * Implementation of kernel_net_t.del_route.
- */
-static status_t del_route(private_kernel_netlink_net_t *this, chunk_t dst_net,
- u_int8_t prefixlen, host_t *gateway, host_t *src_ip, char *if_name)
-{
- return manage_srcroute(this, RTM_DELROUTE, 0, dst_net, prefixlen,
- gateway, src_ip, if_name);
-}
-
-/**
- * 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;
-
- DBG1(DBG_KNL, "listening on interfaces:");
-
- memset(&request, 0, sizeof(request));
-
- in = (struct nlmsghdr*)&request;
- in->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg));
- in->nlmsg_flags = NLM_F_REQUEST | NLM_F_MATCH | NLM_F_ROOT;
- msg = (struct rtgenmsg*)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->mutex->lock(this->mutex);
- ifaces = this->ifaces->create_enumerator(this->ifaces);
- while (ifaces->enumerate(ifaces, &iface))
- {
- if (iface->flags & IFF_UP)
- {
- DBG1(DBG_KNL, " %s", iface->ifname);
- addrs = iface->addrs->create_enumerator(iface->addrs);
- while (addrs->enumerate(addrs, (void**)&addr))
- {
- DBG1(DBG_KNL, " %H", addr->ip);
- }
- addrs->destroy(addrs);
- }
- }
- ifaces->destroy(ifaces);
- this->mutex->unlock(this->mutex);
- 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;
-
- memset(&request, 0, sizeof(request));
- hdr = (struct nlmsghdr*)request;
- 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 = (struct rtmsg*)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));
-
- return this->socket->send_ack(this->socket, hdr);
-}
-
-/**
- * Implementation of kernel_netlink_net_t.destroy.
- */
-static void destroy(private_kernel_netlink_net_t *this)
-{
- 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);
- }
-
- this->job->cancel(this->job);
- close(this->socket_events);
- this->socket->destroy(this->socket);
- this->ifaces->destroy_function(this->ifaces, (void*)iface_entry_destroy);
- this->condvar->destroy(this->condvar);
- this->mutex->destroy(this->mutex);
- free(this);
-}
-
-/*
- * Described in header.
- */
-kernel_netlink_net_t *kernel_netlink_net_create()
-{
- private_kernel_netlink_net_t *this = malloc_thing(private_kernel_netlink_net_t);
- struct sockaddr_nl addr;
-
- /* public functions */
- this->public.interface.get_interface = (char*(*)(kernel_net_t*,host_t*))get_interface_name;
- this->public.interface.create_address_enumerator = (enumerator_t*(*)(kernel_net_t*,bool,bool))create_address_enumerator;
- this->public.interface.get_source_addr = (host_t*(*)(kernel_net_t*, host_t *dest, host_t *src))get_source_addr;
- this->public.interface.get_nexthop = (host_t*(*)(kernel_net_t*, host_t *dest))get_nexthop;
- this->public.interface.add_ip = (status_t(*)(kernel_net_t*,host_t*,host_t*)) add_ip;
- this->public.interface.del_ip = (status_t(*)(kernel_net_t*,host_t*)) del_ip;
- this->public.interface.add_route = (status_t(*)(kernel_net_t*,chunk_t,u_int8_t,host_t*,host_t*,char*)) add_route;
- this->public.interface.del_route = (status_t(*)(kernel_net_t*,chunk_t,u_int8_t,host_t*,host_t*,char*)) del_route;
- this->public.interface.destroy = (void(*)(kernel_net_t*)) destroy;
-
- /* private members */
- this->ifaces = linked_list_create();
- this->mutex = mutex_create(MUTEX_TYPE_RECURSIVE);
- this->condvar = condvar_create(CONDVAR_TYPE_DEFAULT);
- timerclear(&this->last_roam);
- this->routing_table = lib->settings->get_int(lib->settings,
- "charon.routing_table", ROUTING_TABLE);
- this->routing_table_prio = lib->settings->get_int(lib->settings,
- "charon.routing_table_prio", ROUTING_TABLE_PRIO);
- this->process_route = lib->settings->get_bool(lib->settings,
- "charon.process_route", TRUE);
- this->install_virtual_ip = lib->settings->get_bool(lib->settings,
- "charon.install_virtual_ip", TRUE);
-
- this->socket = netlink_socket_create(NETLINK_ROUTE);
-
- 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)
- {
- charon->kill(charon, "unable to create RT event socket");
- }
- addr.nl_groups = RTMGRP_IPV4_IFADDR | RTMGRP_IPV6_IFADDR |
- RTMGRP_IPV4_ROUTE | RTMGRP_IPV4_ROUTE | RTMGRP_LINK;
- if (bind(this->socket_events, (struct sockaddr*)&addr, sizeof(addr)))
- {
- charon->kill(charon, "unable to bind RT event socket");
- }
-
- this->job = callback_job_create((callback_job_cb_t)receive_events,
- this, NULL, NULL);
- charon->processor->queue_job(charon->processor, (job_t*)this->job);
-
- if (init_address_list(this) != SUCCESS)
- {
- charon->kill(charon, "unable to get interface list");
- }
-
- 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/charon/plugins/kernel_netlink/kernel_netlink_net.h b/src/charon/plugins/kernel_netlink/kernel_netlink_net.h
deleted file mode 100644
index ff9831d3c..000000000
--- a/src/charon/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/charon/plugins/kernel_netlink/kernel_netlink_plugin.c b/src/charon/plugins/kernel_netlink/kernel_netlink_plugin.c
deleted file mode 100644
index cdf20f14a..000000000
--- a/src/charon/plugins/kernel_netlink/kernel_netlink_plugin.c
+++ /dev/null
@@ -1,59 +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 <daemon.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;
-};
-
-/**
- * Implementation of plugin_t.destroy
- */
-static void destroy(private_kernel_netlink_plugin_t *this)
-{
- charon->kernel_interface->remove_ipsec_interface(charon->kernel_interface, (kernel_ipsec_constructor_t)kernel_netlink_ipsec_create);
- charon->kernel_interface->remove_net_interface(charon->kernel_interface, (kernel_net_constructor_t)kernel_netlink_net_create);
- free(this);
-}
-
-/*
- * see header file
- */
-plugin_t *plugin_create()
-{
- private_kernel_netlink_plugin_t *this = malloc_thing(private_kernel_netlink_plugin_t);
-
- this->public.plugin.destroy = (void(*)(plugin_t*))destroy;
-
- charon->kernel_interface->add_ipsec_interface(charon->kernel_interface, (kernel_ipsec_constructor_t)kernel_netlink_ipsec_create);
- charon->kernel_interface->add_net_interface(charon->kernel_interface, (kernel_net_constructor_t)kernel_netlink_net_create);
-
- return &this->public.plugin;
-}
diff --git a/src/charon/plugins/kernel_netlink/kernel_netlink_plugin.h b/src/charon/plugins/kernel_netlink/kernel_netlink_plugin.h
deleted file mode 100644
index ec6036b98..000000000
--- a/src/charon/plugins/kernel_netlink/kernel_netlink_plugin.h
+++ /dev/null
@@ -1,47 +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 cplugins
- *
- * @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;
-};
-
-/**
- * Create a kernel_netlink_plugin instance.
- */
-plugin_t *plugin_create();
-
-#endif /** KERNEL_NETLINK_PLUGIN_H_ @}*/
diff --git a/src/charon/plugins/kernel_netlink/kernel_netlink_shared.c b/src/charon/plugins/kernel_netlink/kernel_netlink_shared.c
deleted file mode 100644
index b96186a3a..000000000
--- a/src/charon/plugins/kernel_netlink/kernel_netlink_shared.c
+++ /dev/null
@@ -1,298 +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 <sys/socket.h>
-#include <linux/netlink.h>
-#include <linux/rtnetlink.h>
-#include <errno.h>
-#include <unistd.h>
-
-#include "kernel_netlink_shared.h"
-
-#include <daemon.h>
-#include <threading/mutex.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 to netlink socket
- */
- mutex_t *mutex;
-
- /**
- * current sequence number for netlink request
- */
- int seq;
-
- /**
- * netlink socket protocol
- */
- int protocol;
-
- /**
- * netlink socket
- */
- int socket;
-};
-
-/**
- * Imported from kernel_netlink_ipsec.c
- */
-extern enum_name_t *xfrm_msg_names;
-
-/**
- * Implementation of netlink_socket_t.send
- */
-static status_t netlink_send(private_netlink_socket_t *this, struct nlmsghdr *in,
- struct nlmsghdr **out, size_t *out_len)
-{
- int len, addr_len;
- struct sockaddr_nl addr;
- chunk_t result = chunk_empty, tmp;
- struct nlmsghdr *msg, peek;
-
- this->mutex->lock(this->mutex);
-
- in->nlmsg_seq = ++this->seq;
- in->nlmsg_pid = getpid();
-
- memset(&addr, 0, sizeof(addr));
- addr.nl_family = AF_NETLINK;
- addr.nl_pid = 0;
- addr.nl_groups = 0;
-
- if (this->protocol == NETLINK_XFRM)
- {
- chunk_t in_chunk = { (u_char*)in, in->nlmsg_len };
-
- DBG3(DBG_KNL, "sending %N: %B", xfrm_msg_names, in->nlmsg_type, &in_chunk);
- }
-
- while (TRUE)
- {
- len = sendto(this->socket, in, in->nlmsg_len, 0,
- (struct sockaddr*)&addr, sizeof(addr));
-
- if (len != in->nlmsg_len)
- {
- if (errno == EINTR)
- {
- /* interrupted, try again */
- continue;
- }
- this->mutex->unlock(this->mutex);
- DBG1(DBG_KNL, "error sending to netlink socket: %s", strerror(errno));
- return FAILED;
- }
- break;
- }
-
- while (TRUE)
- {
- char buf[4096];
- tmp.len = sizeof(buf);
- tmp.ptr = buf;
- msg = (struct nlmsghdr*)tmp.ptr;
-
- memset(&addr, 0, sizeof(addr));
- addr.nl_family = AF_NETLINK;
- addr.nl_pid = getpid();
- addr.nl_groups = 0;
- addr_len = sizeof(addr);
-
- len = recvfrom(this->socket, tmp.ptr, tmp.len, 0,
- (struct sockaddr*)&addr, &addr_len);
-
- if (len < 0)
- {
- if (errno == EINTR)
- {
- DBG1(DBG_KNL, "got interrupted");
- /* interrupted, try again */
- continue;
- }
- DBG1(DBG_KNL, "error reading from netlink socket: %s", strerror(errno));
- this->mutex->unlock(this->mutex);
- free(result.ptr);
- return FAILED;
- }
- if (!NLMSG_OK(msg, len))
- {
- DBG1(DBG_KNL, "received corrupted netlink message");
- this->mutex->unlock(this->mutex);
- free(result.ptr);
- return FAILED;
- }
- if (msg->nlmsg_seq != this->seq)
- {
- DBG1(DBG_KNL, "received invalid netlink sequence number");
- if (msg->nlmsg_seq < this->seq)
- {
- continue;
- }
- this->mutex->unlock(this->mutex);
- free(result.ptr);
- return FAILED;
- }
-
- tmp.len = len;
- result.ptr = realloc(result.ptr, result.len + tmp.len);
- memcpy(result.ptr + result.len, tmp.ptr, tmp.len);
- result.len += tmp.len;
-
- /* NLM_F_MULTI flag does not seem to be set correctly, we use sequence
- * numbers to detect multi header messages */
- len = recvfrom(this->socket, &peek, sizeof(peek), MSG_PEEK | MSG_DONTWAIT,
- (struct sockaddr*)&addr, &addr_len);
-
- if (len == sizeof(peek) && peek.nlmsg_seq == this->seq)
- {
- /* seems to be multipart */
- continue;
- }
- break;
- }
-
- *out_len = result.len;
- *out = (struct nlmsghdr*)result.ptr;
-
- this->mutex->unlock(this->mutex);
-
- return SUCCESS;
-}
-
-/**
- * Implementation of netlink_socket_t.send_ack.
- */
-static status_t netlink_send_ack(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 = (struct nlmsgerr*)NLMSG_DATA(hdr);
-
- if (err->error)
- {
- if (-err->error == EEXIST)
- { /* do not report existing routes */
- free(out);
- return ALREADY_DONE;
- }
- 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;
-}
-
-/**
- * Implementation of netlink_socket_t.destroy.
- */
-static void destroy(private_netlink_socket_t *this)
-{
- close(this->socket);
- this->mutex->destroy(this->mutex);
- free(this);
-}
-
-/**
- * Described in header.
- */
-netlink_socket_t *netlink_socket_create(int protocol) {
- private_netlink_socket_t *this = malloc_thing(private_netlink_socket_t);
- struct sockaddr_nl addr;
-
- /* public functions */
- this->public.send = (status_t(*)(netlink_socket_t*,struct nlmsghdr*, struct nlmsghdr**, size_t*))netlink_send;
- this->public.send_ack = (status_t(*)(netlink_socket_t*,struct nlmsghdr*))netlink_send_ack;
- this->public.destroy = (void(*)(netlink_socket_t*))destroy;
-
- /* private members */
- this->seq = 200;
- this->mutex = mutex_create(MUTEX_TYPE_DEFAULT);
-
- memset(&addr, 0, sizeof(addr));
- addr.nl_family = AF_NETLINK;
-
- this->protocol = protocol;
- this->socket = socket(AF_NETLINK, SOCK_RAW, protocol);
- if (this->socket <= 0)
- {
- charon->kill(charon, "unable to create netlink socket");
- }
-
- addr.nl_groups = 0;
- if (bind(this->socket, (struct sockaddr*)&addr, sizeof(addr)))
- {
- charon->kill(charon, "unable to bind netlink socket");
- }
-
- 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_ALIGN(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;
-}
diff --git a/src/charon/plugins/kernel_netlink/kernel_netlink_shared.h b/src/charon/plugins/kernel_netlink/kernel_netlink_shared.h
deleted file mode 100644
index dfd27a21a..000000000
--- a/src/charon/plugins/kernel_netlink/kernel_netlink_shared.h
+++ /dev/null
@@ -1,77 +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 u_char netlink_buf_t[1024] __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)
- */
-netlink_socket_t *netlink_socket_create(int protocol);
-
-/**
- * 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);
-
-#endif /* KERNEL_NETLINK_SHARED_H_ */
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-21 00:08:16 +0000