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Diffstat (limited to 'src/libhydra/plugins/kernel_netlink/kernel_netlink_ipsec.c')
-rw-r--r--src/libhydra/plugins/kernel_netlink/kernel_netlink_ipsec.c2966
1 files changed, 0 insertions, 2966 deletions
diff --git a/src/libhydra/plugins/kernel_netlink/kernel_netlink_ipsec.c b/src/libhydra/plugins/kernel_netlink/kernel_netlink_ipsec.c
deleted file mode 100644
index 8c506d9f4..000000000
--- a/src/libhydra/plugins/kernel_netlink/kernel_netlink_ipsec.c
+++ /dev/null
@@ -1,2966 +0,0 @@
-/*
- * Copyright (C) 2006-2015 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 <hydra.h>
-#include <utils/debug.h>
-#include <threading/mutex.h>
-#include <collections/array.h>
-#include <collections/hashtable.h>
-#include <collections/linked_list.h>
-
-/** Required for Linux 2.6.26 kernel and later */
-#ifndef XFRM_STATE_AF_UNSPEC
-#define XFRM_STATE_AF_UNSPEC 32
-#endif
-
-/** From linux/in.h */
-#ifndef IP_XFRM_POLICY
-#define IP_XFRM_POLICY 17
-#endif
-
-/** Missing on uclibc */
-#ifndef IPV6_XFRM_POLICY
-#define IPV6_XFRM_POLICY 34
-#endif /*IPV6_XFRM_POLICY*/
-
-/* from linux/udp.h */
-#ifndef UDP_ENCAP
-#define UDP_ENCAP 100
-#endif
-
-#ifndef UDP_ENCAP_ESPINUDP
-#define UDP_ENCAP_ESPINUDP 2
-#endif
-
-/* this is not defined on some platforms */
-#ifndef SOL_UDP
-#define SOL_UDP IPPROTO_UDP
-#endif
-
-/** Base priority for installed policies */
-#define PRIO_BASE 384
-
-/** Default lifetime of an acquire XFRM state (in seconds) */
-#define DEFAULT_ACQUIRE_LIFETIME 165
-
-/**
- * Map the limit for bytes and packets to XFRM_INF by default
- */
-#define XFRM_LIMIT(x) ((x) == 0 ? XFRM_INF : (x))
-
-/**
- * Create ORable bitfield of XFRM NL groups
- */
-#define XFRMNLGRP(x) (1<<(XFRMNLGRP_##x-1))
-
-/**
- * Returns a pointer to the first rtattr following the nlmsghdr *nlh and the
- * 'usual' netlink data x like 'struct xfrm_usersa_info'
- */
-#define XFRM_RTA(nlh, x) ((struct rtattr*)(NLMSG_DATA(nlh) + \
- NLMSG_ALIGN(sizeof(x))))
-/**
- * Returns the total size of attached rta data
- * (after 'usual' netlink data x like 'struct xfrm_usersa_info')
- */
-#define XFRM_PAYLOAD(nlh, x) NLMSG_PAYLOAD(nlh, sizeof(x))
-
-typedef struct kernel_algorithm_t kernel_algorithm_t;
-
-/**
- * Mapping of IKEv2 kernel identifier to linux crypto API names
- */
-struct kernel_algorithm_t {
- /**
- * Identifier specified in IKEv2
- */
- int ikev2;
-
- /**
- * Name of the algorithm in linux crypto API
- */
- char *name;
-};
-
-ENUM(xfrm_msg_names, XFRM_MSG_NEWSA, XFRM_MSG_MAPPING,
- "XFRM_MSG_NEWSA",
- "XFRM_MSG_DELSA",
- "XFRM_MSG_GETSA",
- "XFRM_MSG_NEWPOLICY",
- "XFRM_MSG_DELPOLICY",
- "XFRM_MSG_GETPOLICY",
- "XFRM_MSG_ALLOCSPI",
- "XFRM_MSG_ACQUIRE",
- "XFRM_MSG_EXPIRE",
- "XFRM_MSG_UPDPOLICY",
- "XFRM_MSG_UPDSA",
- "XFRM_MSG_POLEXPIRE",
- "XFRM_MSG_FLUSHSA",
- "XFRM_MSG_FLUSHPOLICY",
- "XFRM_MSG_NEWAE",
- "XFRM_MSG_GETAE",
- "XFRM_MSG_REPORT",
- "XFRM_MSG_MIGRATE",
- "XFRM_MSG_NEWSADINFO",
- "XFRM_MSG_GETSADINFO",
- "XFRM_MSG_NEWSPDINFO",
- "XFRM_MSG_GETSPDINFO",
- "XFRM_MSG_MAPPING"
-);
-
-ENUM(xfrm_attr_type_names, XFRMA_UNSPEC, XFRMA_REPLAY_ESN_VAL,
- "XFRMA_UNSPEC",
- "XFRMA_ALG_AUTH",
- "XFRMA_ALG_CRYPT",
- "XFRMA_ALG_COMP",
- "XFRMA_ENCAP",
- "XFRMA_TMPL",
- "XFRMA_SA",
- "XFRMA_POLICY",
- "XFRMA_SEC_CTX",
- "XFRMA_LTIME_VAL",
- "XFRMA_REPLAY_VAL",
- "XFRMA_REPLAY_THRESH",
- "XFRMA_ETIMER_THRESH",
- "XFRMA_SRCADDR",
- "XFRMA_COADDR",
- "XFRMA_LASTUSED",
- "XFRMA_POLICY_TYPE",
- "XFRMA_MIGRATE",
- "XFRMA_ALG_AEAD",
- "XFRMA_KMADDRESS",
- "XFRMA_ALG_AUTH_TRUNC",
- "XFRMA_MARK",
- "XFRMA_TFCPAD",
- "XFRMA_REPLAY_ESN_VAL",
-);
-
-/**
- * Algorithms for encryption
- */
-static kernel_algorithm_t encryption_algs[] = {
-/* {ENCR_DES_IV64, "***" }, */
- {ENCR_DES, "des" },
- {ENCR_3DES, "des3_ede" },
-/* {ENCR_RC5, "***" }, */
-/* {ENCR_IDEA, "***" }, */
- {ENCR_CAST, "cast5" },
- {ENCR_BLOWFISH, "blowfish" },
-/* {ENCR_3IDEA, "***" }, */
-/* {ENCR_DES_IV32, "***" }, */
- {ENCR_NULL, "cipher_null" },
- {ENCR_AES_CBC, "aes" },
- {ENCR_AES_CTR, "rfc3686(ctr(aes))" },
- {ENCR_AES_CCM_ICV8, "rfc4309(ccm(aes))" },
- {ENCR_AES_CCM_ICV12, "rfc4309(ccm(aes))" },
- {ENCR_AES_CCM_ICV16, "rfc4309(ccm(aes))" },
- {ENCR_AES_GCM_ICV8, "rfc4106(gcm(aes))" },
- {ENCR_AES_GCM_ICV12, "rfc4106(gcm(aes))" },
- {ENCR_AES_GCM_ICV16, "rfc4106(gcm(aes))" },
- {ENCR_NULL_AUTH_AES_GMAC, "rfc4543(gcm(aes))" },
- {ENCR_CAMELLIA_CBC, "cbc(camellia)" },
-/* {ENCR_CAMELLIA_CTR, "***" }, */
-/* {ENCR_CAMELLIA_CCM_ICV8, "***" }, */
-/* {ENCR_CAMELLIA_CCM_ICV12, "***" }, */
-/* {ENCR_CAMELLIA_CCM_ICV16, "***" }, */
- {ENCR_SERPENT_CBC, "serpent" },
- {ENCR_TWOFISH_CBC, "twofish" },
- {ENCR_CHACHA20_POLY1305, "rfc7539esp(chacha20,poly1305)"},
-};
-
-/**
- * Algorithms for integrity protection
- */
-static kernel_algorithm_t integrity_algs[] = {
- {AUTH_HMAC_MD5_96, "md5" },
- {AUTH_HMAC_MD5_128, "hmac(md5)" },
- {AUTH_HMAC_SHA1_96, "sha1" },
- {AUTH_HMAC_SHA1_160, "hmac(sha1)" },
- {AUTH_HMAC_SHA2_256_96, "sha256" },
- {AUTH_HMAC_SHA2_256_128, "hmac(sha256)" },
- {AUTH_HMAC_SHA2_384_192, "hmac(sha384)" },
- {AUTH_HMAC_SHA2_512_256, "hmac(sha512)" },
-/* {AUTH_DES_MAC, "***" }, */
-/* {AUTH_KPDK_MD5, "***" }, */
- {AUTH_AES_XCBC_96, "xcbc(aes)" },
-};
-
-/**
- * Algorithms for IPComp
- */
-static kernel_algorithm_t compression_algs[] = {
-/* {IPCOMP_OUI, "***" }, */
- {IPCOMP_DEFLATE, "deflate" },
- {IPCOMP_LZS, "lzs" },
- {IPCOMP_LZJH, "lzjh" },
-};
-
-/**
- * Look up a kernel algorithm name and its key size
- */
-static char* lookup_algorithm(transform_type_t type, int ikev2)
-{
- kernel_algorithm_t *list;
- int i, count;
- char *name;
-
- switch (type)
- {
- case ENCRYPTION_ALGORITHM:
- list = encryption_algs;
- count = countof(encryption_algs);
- break;
- case INTEGRITY_ALGORITHM:
- list = integrity_algs;
- count = countof(integrity_algs);
- break;
- case COMPRESSION_ALGORITHM:
- list = compression_algs;
- count = countof(compression_algs);
- break;
- default:
- return NULL;
- }
- for (i = 0; i < count; i++)
- {
- if (list[i].ikev2 == ikev2)
- {
- return list[i].name;
- }
- }
- if (hydra->kernel_interface->lookup_algorithm(hydra->kernel_interface,
- ikev2, type, NULL, &name))
- {
- return name;
- }
- return NULL;
-}
-
-typedef struct private_kernel_netlink_ipsec_t private_kernel_netlink_ipsec_t;
-
-/**
- * Private variables and functions of kernel_netlink class.
- */
-struct private_kernel_netlink_ipsec_t {
- /**
- * Public part of the kernel_netlink_t object
- */
- kernel_netlink_ipsec_t public;
-
- /**
- * Mutex to lock access to installed policies
- */
- mutex_t *mutex;
-
- /**
- * Hash table of installed policies (policy_entry_t)
- */
- hashtable_t *policies;
-
- /**
- * Hash table of IPsec SAs using policies (ipsec_sa_t)
- */
- hashtable_t *sas;
-
- /**
- * Netlink xfrm socket (IPsec)
- */
- netlink_socket_t *socket_xfrm;
-
- /**
- * Netlink xfrm socket to receive acquire and expire events
- */
- int socket_xfrm_events;
-
- /**
- * Whether to install routes along policies
- */
- bool install_routes;
-
- /**
- * Whether to set protocol and ports on selector installed with transport
- * mode IPsec SAs
- */
- bool proto_port_transport;
-
- /**
- * Whether to always use UPDATE to install policies
- */
- bool policy_update;
-
- /**
- * Installed port based IKE bypass policies, as bypass_t
- */
- array_t *bypass;
-};
-
-typedef struct route_entry_t route_entry_t;
-
-/**
- * Installed routing entry
- */
-struct route_entry_t {
- /** Name of the interface the route is bound to */
- char *if_name;
-
- /** Source ip of the route */
- host_t *src_ip;
-
- /** Gateway for this route */
- host_t *gateway;
-
- /** Destination net */
- chunk_t dst_net;
-
- /** Destination net prefixlen */
- u_int8_t prefixlen;
-};
-
-/**
- * Destroy a route_entry_t object
- */
-static void route_entry_destroy(route_entry_t *this)
-{
- free(this->if_name);
- this->src_ip->destroy(this->src_ip);
- DESTROY_IF(this->gateway);
- chunk_free(&this->dst_net);
- free(this);
-}
-
-/**
- * Compare two route_entry_t objects
- */
-static bool route_entry_equals(route_entry_t *a, route_entry_t *b)
-{
- return a->if_name && b->if_name && streq(a->if_name, b->if_name) &&
- a->src_ip->ip_equals(a->src_ip, b->src_ip) &&
- a->gateway->ip_equals(a->gateway, b->gateway) &&
- chunk_equals(a->dst_net, b->dst_net) && a->prefixlen == b->prefixlen;
-}
-
-typedef struct ipsec_sa_t ipsec_sa_t;
-
-/**
- * IPsec SA assigned to a policy.
- */
-struct ipsec_sa_t {
- /** Source address of this SA */
- host_t *src;
-
- /** Destination address of this SA */
- host_t *dst;
-
- /** Optional mark */
- mark_t mark;
-
- /** Description of this SA */
- ipsec_sa_cfg_t cfg;
-
- /** Reference count for this SA */
- refcount_t refcount;
-};
-
-/**
- * Hash function for ipsec_sa_t objects
- */
-static u_int ipsec_sa_hash(ipsec_sa_t *sa)
-{
- return chunk_hash_inc(sa->src->get_address(sa->src),
- chunk_hash_inc(sa->dst->get_address(sa->dst),
- chunk_hash_inc(chunk_from_thing(sa->mark),
- chunk_hash(chunk_from_thing(sa->cfg)))));
-}
-
-/**
- * Equality function for ipsec_sa_t objects
- */
-static bool ipsec_sa_equals(ipsec_sa_t *sa, ipsec_sa_t *other_sa)
-{
- return sa->src->ip_equals(sa->src, other_sa->src) &&
- sa->dst->ip_equals(sa->dst, other_sa->dst) &&
- memeq(&sa->mark, &other_sa->mark, sizeof(mark_t)) &&
- memeq(&sa->cfg, &other_sa->cfg, sizeof(ipsec_sa_cfg_t));
-}
-
-/**
- * Allocate or reference an IPsec SA object
- */
-static ipsec_sa_t *ipsec_sa_create(private_kernel_netlink_ipsec_t *this,
- host_t *src, host_t *dst, mark_t mark,
- ipsec_sa_cfg_t *cfg)
-{
- ipsec_sa_t *sa, *found;
- INIT(sa,
- .src = src,
- .dst = dst,
- .mark = mark,
- .cfg = *cfg,
- );
- found = this->sas->get(this->sas, sa);
- if (!found)
- {
- sa->src = src->clone(src);
- sa->dst = dst->clone(dst);
- this->sas->put(this->sas, sa, sa);
- }
- else
- {
- free(sa);
- sa = found;
- }
- ref_get(&sa->refcount);
- return sa;
-}
-
-/**
- * Release and destroy an IPsec SA object
- */
-static void ipsec_sa_destroy(private_kernel_netlink_ipsec_t *this,
- ipsec_sa_t *sa)
-{
- if (ref_put(&sa->refcount))
- {
- this->sas->remove(this->sas, sa);
- DESTROY_IF(sa->src);
- DESTROY_IF(sa->dst);
- free(sa);
- }
-}
-
-typedef struct policy_sa_t policy_sa_t;
-typedef struct policy_sa_fwd_t policy_sa_fwd_t;
-
-/**
- * Mapping between a policy and an IPsec SA.
- */
-struct policy_sa_t {
- /** Priority assigned to the policy when installed with this SA */
- u_int32_t priority;
-
- /** Type of the policy */
- policy_type_t type;
-
- /** Assigned SA */
- ipsec_sa_t *sa;
-};
-
-/**
- * For forward policies we also cache the traffic selectors in order to install
- * the route.
- */
-struct policy_sa_fwd_t {
- /** Generic interface */
- policy_sa_t generic;
-
- /** Source traffic selector of this policy */
- traffic_selector_t *src_ts;
-
- /** Destination traffic selector of this policy */
- traffic_selector_t *dst_ts;
-};
-
-/**
- * Create a policy_sa(_fwd)_t object
- */
-static policy_sa_t *policy_sa_create(private_kernel_netlink_ipsec_t *this,
- policy_dir_t dir, policy_type_t type, host_t *src, host_t *dst,
- traffic_selector_t *src_ts, traffic_selector_t *dst_ts, mark_t mark,
- ipsec_sa_cfg_t *cfg)
-{
- policy_sa_t *policy;
-
- if (dir == POLICY_FWD)
- {
- policy_sa_fwd_t *fwd;
- INIT(fwd,
- .src_ts = src_ts->clone(src_ts),
- .dst_ts = dst_ts->clone(dst_ts),
- );
- policy = &fwd->generic;
- }
- else
- {
- INIT(policy, .priority = 0);
- }
- policy->type = type;
- policy->sa = ipsec_sa_create(this, src, dst, mark, cfg);
- return policy;
-}
-
-/**
- * Destroy a policy_sa(_fwd)_t object
- */
-static void policy_sa_destroy(policy_sa_t *policy, policy_dir_t *dir,
- private_kernel_netlink_ipsec_t *this)
-{
- if (*dir == POLICY_FWD)
- {
- policy_sa_fwd_t *fwd = (policy_sa_fwd_t*)policy;
- fwd->src_ts->destroy(fwd->src_ts);
- fwd->dst_ts->destroy(fwd->dst_ts);
- }
- ipsec_sa_destroy(this, policy->sa);
- free(policy);
-}
-
-typedef struct policy_entry_t policy_entry_t;
-
-/**
- * Installed kernel policy.
- */
-struct policy_entry_t {
-
- /** Direction of this policy: in, out, forward */
- u_int8_t direction;
-
- /** Parameters of installed policy */
- struct xfrm_selector sel;
-
- /** Optional mark */
- u_int32_t mark;
-
- /** Associated route installed for this policy */
- route_entry_t *route;
-
- /** List of SAs this policy is used by, ordered by priority */
- linked_list_t *used_by;
-
- /** reqid for this policy */
- u_int32_t reqid;
-};
-
-/**
- * Destroy a policy_entry_t object
- */
-static void policy_entry_destroy(private_kernel_netlink_ipsec_t *this,
- policy_entry_t *policy)
-{
- if (policy->route)
- {
- route_entry_destroy(policy->route);
- }
- if (policy->used_by)
- {
- policy->used_by->invoke_function(policy->used_by,
- (linked_list_invoke_t)policy_sa_destroy,
- &policy->direction, this);
- policy->used_by->destroy(policy->used_by);
- }
- free(policy);
-}
-
-/**
- * Hash function for policy_entry_t objects
- */
-static u_int policy_hash(policy_entry_t *key)
-{
- chunk_t chunk = chunk_from_thing(key->sel);
- return chunk_hash_inc(chunk, chunk_hash(chunk_from_thing(key->mark)));
-}
-
-/**
- * Equality function for policy_entry_t objects
- */
-static bool policy_equals(policy_entry_t *key, policy_entry_t *other_key)
-{
- return memeq(&key->sel, &other_key->sel, sizeof(struct xfrm_selector)) &&
- key->mark == other_key->mark &&
- key->direction == other_key->direction;
-}
-
-/**
- * Calculate the priority of a policy
- */
-static inline u_int32_t get_priority(policy_entry_t *policy,
- policy_priority_t prio)
-{
- u_int32_t priority = PRIO_BASE;
- switch (prio)
- {
- case POLICY_PRIORITY_FALLBACK:
- priority <<= 1;
- /* fall-through */
- case POLICY_PRIORITY_ROUTED:
- priority <<= 1;
- /* fall-through */
- case POLICY_PRIORITY_DEFAULT:
- priority <<= 1;
- /* fall-through */
- case POLICY_PRIORITY_PASS:
- break;
- }
- /* calculate priority based on selector size, small size = high prio */
- priority -= policy->sel.prefixlen_s;
- priority -= policy->sel.prefixlen_d;
- priority <<= 2; /* make some room for the two flags */
- priority += policy->sel.sport_mask || policy->sel.dport_mask ? 0 : 2;
- priority += policy->sel.proto ? 0 : 1;
- return priority;
-}
-
-/**
- * Convert the general ipsec mode to the one defined in xfrm.h
- */
-static u_int8_t mode2kernel(ipsec_mode_t mode)
-{
- switch (mode)
- {
- case MODE_TRANSPORT:
- return XFRM_MODE_TRANSPORT;
- case MODE_TUNNEL:
- return XFRM_MODE_TUNNEL;
- case MODE_BEET:
- return XFRM_MODE_BEET;
- default:
- return mode;
- }
-}
-
-/**
- * Convert a host_t to a struct xfrm_address
- */
-static void host2xfrm(host_t *host, xfrm_address_t *xfrm)
-{
- chunk_t chunk = host->get_address(host);
- memcpy(xfrm, chunk.ptr, min(chunk.len, sizeof(xfrm_address_t)));
-}
-
-/**
- * Convert a struct xfrm_address to a host_t
- */
-static host_t* xfrm2host(int family, xfrm_address_t *xfrm, u_int16_t port)
-{
- chunk_t chunk;
-
- switch (family)
- {
- case AF_INET:
- chunk = chunk_create((u_char*)&xfrm->a4, sizeof(xfrm->a4));
- break;
- case AF_INET6:
- chunk = chunk_create((u_char*)&xfrm->a6, sizeof(xfrm->a6));
- break;
- default:
- return NULL;
- }
- return host_create_from_chunk(family, chunk, ntohs(port));
-}
-
-/**
- * Convert a traffic selector address range to subnet and its mask.
- */
-static void ts2subnet(traffic_selector_t* ts,
- xfrm_address_t *net, u_int8_t *mask)
-{
- host_t *net_host;
- chunk_t net_chunk;
-
- ts->to_subnet(ts, &net_host, mask);
- net_chunk = net_host->get_address(net_host);
- memcpy(net, net_chunk.ptr, net_chunk.len);
- net_host->destroy(net_host);
-}
-
-/**
- * Convert a traffic selector port range to port/portmask
- */
-static void ts2ports(traffic_selector_t* ts,
- u_int16_t *port, u_int16_t *mask)
-{
- /* Linux does not seem to accept complex portmasks. Only
- * any or a specific port is allowed. We set to any, if we have
- * a port range, or to a specific, if we have one port only.
- */
- u_int16_t from, to;
-
- from = ts->get_from_port(ts);
- to = ts->get_to_port(ts);
-
- if (from == to)
- {
- *port = htons(from);
- *mask = ~0;
- }
- else
- {
- *port = 0;
- *mask = 0;
- }
-}
-
-/**
- * Convert a pair of traffic_selectors to an xfrm_selector
- */
-static struct xfrm_selector ts2selector(traffic_selector_t *src,
- traffic_selector_t *dst)
-{
- struct xfrm_selector sel;
- u_int16_t port;
-
- memset(&sel, 0, sizeof(sel));
- sel.family = (src->get_type(src) == TS_IPV4_ADDR_RANGE) ? AF_INET : AF_INET6;
- /* src or dest proto may be "any" (0), use more restrictive one */
- sel.proto = max(src->get_protocol(src), dst->get_protocol(dst));
- ts2subnet(dst, &sel.daddr, &sel.prefixlen_d);
- ts2subnet(src, &sel.saddr, &sel.prefixlen_s);
- ts2ports(dst, &sel.dport, &sel.dport_mask);
- ts2ports(src, &sel.sport, &sel.sport_mask);
- if ((sel.proto == IPPROTO_ICMP || sel.proto == IPPROTO_ICMPV6) &&
- (sel.dport || sel.sport))
- {
- /* the kernel expects the ICMP type and code in the source and
- * destination port fields, respectively. */
- port = ntohs(max(sel.dport, sel.sport));
- sel.sport = htons(traffic_selector_icmp_type(port));
- sel.sport_mask = sel.sport ? ~0 : 0;
- sel.dport = htons(traffic_selector_icmp_code(port));
- sel.dport_mask = sel.dport ? ~0 : 0;
- }
- sel.ifindex = 0;
- sel.user = 0;
-
- return sel;
-}
-
-/**
- * Convert an xfrm_selector to a src|dst traffic_selector
- */
-static traffic_selector_t* selector2ts(struct xfrm_selector *sel, bool src)
-{
- u_char *addr;
- u_int8_t prefixlen;
- u_int16_t port = 0;
- host_t *host = NULL;
-
- if (src)
- {
- addr = (u_char*)&sel->saddr;
- prefixlen = sel->prefixlen_s;
- if (sel->sport_mask)
- {
- port = ntohs(sel->sport);
- }
- }
- else
- {
- addr = (u_char*)&sel->daddr;
- prefixlen = sel->prefixlen_d;
- if (sel->dport_mask)
- {
- port = ntohs(sel->dport);
- }
- }
- if (sel->proto == IPPROTO_ICMP || sel->proto == IPPROTO_ICMPV6)
- { /* convert ICMP[v6] message type and code as supplied by the kernel in
- * source and destination ports (both in network order) */
- port = (sel->sport >> 8) | (sel->dport & 0xff00);
- port = ntohs(port);
- }
- /* The Linux 2.6 kernel does not set the selector's family field,
- * so as a kludge we additionally test the prefix length.
- */
- if (sel->family == AF_INET || sel->prefixlen_s == 32)
- {
- host = host_create_from_chunk(AF_INET, chunk_create(addr, 4), 0);
- }
- else if (sel->family == AF_INET6 || sel->prefixlen_s == 128)
- {
- host = host_create_from_chunk(AF_INET6, chunk_create(addr, 16), 0);
- }
-
- if (host)
- {
- return traffic_selector_create_from_subnet(host, prefixlen,
- sel->proto, port, port ?: 65535);
- }
- return NULL;
-}
-
-/**
- * Process a XFRM_MSG_ACQUIRE from kernel
- */
-static void process_acquire(private_kernel_netlink_ipsec_t *this,
- struct nlmsghdr *hdr)
-{
- struct xfrm_user_acquire *acquire;
- struct rtattr *rta;
- size_t rtasize;
- traffic_selector_t *src_ts, *dst_ts;
- u_int32_t reqid = 0;
- int proto = 0;
-
- acquire = NLMSG_DATA(hdr);
- rta = XFRM_RTA(hdr, struct xfrm_user_acquire);
- rtasize = XFRM_PAYLOAD(hdr, struct xfrm_user_acquire);
-
- DBG2(DBG_KNL, "received a XFRM_MSG_ACQUIRE");
-
- while (RTA_OK(rta, rtasize))
- {
- DBG2(DBG_KNL, " %N", xfrm_attr_type_names, rta->rta_type);
-
- if (rta->rta_type == XFRMA_TMPL)
- {
- struct xfrm_user_tmpl* tmpl;
- tmpl = (struct xfrm_user_tmpl*)RTA_DATA(rta);
- reqid = tmpl->reqid;
- proto = tmpl->id.proto;
- }
- rta = RTA_NEXT(rta, rtasize);
- }
- switch (proto)
- {
- case 0:
- case IPPROTO_ESP:
- case IPPROTO_AH:
- break;
- default:
- /* acquire for AH/ESP only, not for IPCOMP */
- return;
- }
- src_ts = selector2ts(&acquire->sel, TRUE);
- dst_ts = selector2ts(&acquire->sel, FALSE);
-
- hydra->kernel_interface->acquire(hydra->kernel_interface, reqid, src_ts,
- dst_ts);
-}
-
-/**
- * Process a XFRM_MSG_EXPIRE from kernel
- */
-static void process_expire(private_kernel_netlink_ipsec_t *this,
- struct nlmsghdr *hdr)
-{
- struct xfrm_user_expire *expire;
- u_int32_t spi;
- u_int8_t protocol;
- host_t *dst;
-
- expire = NLMSG_DATA(hdr);
- protocol = expire->state.id.proto;
- spi = expire->state.id.spi;
-
- DBG2(DBG_KNL, "received a XFRM_MSG_EXPIRE");
-
- if (protocol == IPPROTO_ESP || protocol == IPPROTO_AH)
- {
- dst = xfrm2host(expire->state.family, &expire->state.id.daddr, 0);
- if (dst)
- {
- hydra->kernel_interface->expire(hydra->kernel_interface, protocol,
- spi, dst, expire->hard != 0);
- dst->destroy(dst);
- }
- }
-}
-
-/**
- * Process a XFRM_MSG_MIGRATE from kernel
- */
-static void process_migrate(private_kernel_netlink_ipsec_t *this,
- struct nlmsghdr *hdr)
-{
- struct xfrm_userpolicy_id *policy_id;
- struct rtattr *rta;
- size_t rtasize;
- traffic_selector_t *src_ts, *dst_ts;
- host_t *local = NULL, *remote = NULL;
- host_t *old_src = NULL, *old_dst = NULL;
- host_t *new_src = NULL, *new_dst = NULL;
- u_int32_t reqid = 0;
- policy_dir_t dir;
-
- policy_id = NLMSG_DATA(hdr);
- rta = XFRM_RTA(hdr, struct xfrm_userpolicy_id);
- rtasize = XFRM_PAYLOAD(hdr, struct xfrm_userpolicy_id);
-
- DBG2(DBG_KNL, "received a XFRM_MSG_MIGRATE");
-
- src_ts = selector2ts(&policy_id->sel, TRUE);
- dst_ts = selector2ts(&policy_id->sel, FALSE);
- dir = (policy_dir_t)policy_id->dir;
-
- DBG2(DBG_KNL, " policy: %R === %R %N", src_ts, dst_ts, policy_dir_names);
-
- while (RTA_OK(rta, rtasize))
- {
- DBG2(DBG_KNL, " %N", xfrm_attr_type_names, rta->rta_type);
- if (rta->rta_type == XFRMA_KMADDRESS)
- {
- struct xfrm_user_kmaddress *kmaddress;
-
- kmaddress = (struct xfrm_user_kmaddress*)RTA_DATA(rta);
- local = xfrm2host(kmaddress->family, &kmaddress->local, 0);
- remote = xfrm2host(kmaddress->family, &kmaddress->remote, 0);
- DBG2(DBG_KNL, " kmaddress: %H...%H", local, remote);
- }
- else if (rta->rta_type == XFRMA_MIGRATE)
- {
- struct xfrm_user_migrate *migrate;
-
- migrate = (struct xfrm_user_migrate*)RTA_DATA(rta);
- old_src = xfrm2host(migrate->old_family, &migrate->old_saddr, 0);
- old_dst = xfrm2host(migrate->old_family, &migrate->old_daddr, 0);
- new_src = xfrm2host(migrate->new_family, &migrate->new_saddr, 0);
- new_dst = xfrm2host(migrate->new_family, &migrate->new_daddr, 0);
- reqid = migrate->reqid;
- DBG2(DBG_KNL, " migrate %H...%H to %H...%H, reqid {%u}",
- old_src, old_dst, new_src, new_dst, reqid);
- DESTROY_IF(old_src);
- DESTROY_IF(old_dst);
- DESTROY_IF(new_src);
- DESTROY_IF(new_dst);
- }
- rta = RTA_NEXT(rta, rtasize);
- }
-
- if (src_ts && dst_ts && local && remote)
- {
- hydra->kernel_interface->migrate(hydra->kernel_interface, reqid,
- src_ts, dst_ts, dir, local, remote);
- }
- else
- {
- DESTROY_IF(src_ts);
- DESTROY_IF(dst_ts);
- DESTROY_IF(local);
- DESTROY_IF(remote);
- }
-}
-
-/**
- * Process a XFRM_MSG_MAPPING from kernel
- */
-static void process_mapping(private_kernel_netlink_ipsec_t *this,
- struct nlmsghdr *hdr)
-{
- struct xfrm_user_mapping *mapping;
- u_int32_t spi;
-
- mapping = NLMSG_DATA(hdr);
- spi = mapping->id.spi;
-
- DBG2(DBG_KNL, "received a XFRM_MSG_MAPPING");
-
- if (mapping->id.proto == IPPROTO_ESP)
- {
- host_t *dst, *new;
-
- dst = xfrm2host(mapping->id.family, &mapping->id.daddr, 0);
- if (dst)
- {
- new = xfrm2host(mapping->id.family, &mapping->new_saddr,
- mapping->new_sport);
- if (new)
- {
- hydra->kernel_interface->mapping(hydra->kernel_interface,
- IPPROTO_ESP, spi, dst, new);
- new->destroy(new);
- }
- dst->destroy(dst);
- }
- }
-}
-
-/**
- * Receives events from kernel
- */
-static bool receive_events(private_kernel_netlink_ipsec_t *this, int fd,
- watcher_event_t event)
-{
- char response[1024];
- struct nlmsghdr *hdr = (struct nlmsghdr*)response;
- struct sockaddr_nl addr;
- socklen_t addr_len = sizeof(addr);
- int len;
-
- len = recvfrom(this->socket_xfrm_events, response, sizeof(response),
- MSG_DONTWAIT, (struct sockaddr*)&addr, &addr_len);
- if (len < 0)
- {
- switch (errno)
- {
- case EINTR:
- /* interrupted, try again */
- return TRUE;
- case EAGAIN:
- /* no data ready, select again */
- return TRUE;
- default:
- DBG1(DBG_KNL, "unable to receive from xfrm event socket");
- sleep(1);
- return TRUE;
- }
- }
-
- if (addr.nl_pid != 0)
- { /* not from kernel. not interested, try another one */
- return TRUE;
- }
-
- while (NLMSG_OK(hdr, len))
- {
- switch (hdr->nlmsg_type)
- {
- case XFRM_MSG_ACQUIRE:
- process_acquire(this, hdr);
- break;
- case XFRM_MSG_EXPIRE:
- process_expire(this, hdr);
- break;
- case XFRM_MSG_MIGRATE:
- process_migrate(this, hdr);
- break;
- case XFRM_MSG_MAPPING:
- process_mapping(this, hdr);
- break;
- default:
- DBG1(DBG_KNL, "received unknown event from xfrm event "
- "socket: %d", hdr->nlmsg_type);
- break;
- }
- hdr = NLMSG_NEXT(hdr, len);
- }
- return TRUE;
-}
-
-METHOD(kernel_ipsec_t, get_features, kernel_feature_t,
- private_kernel_netlink_ipsec_t *this)
-{
- return KERNEL_ESP_V3_TFC;
-}
-
-/**
- * Get an SPI for a specific protocol from the kernel.
- */
-static status_t get_spi_internal(private_kernel_netlink_ipsec_t *this,
- host_t *src, host_t *dst, u_int8_t proto, u_int32_t min, u_int32_t max,
- u_int32_t *spi)
-{
- netlink_buf_t request;
- struct nlmsghdr *hdr, *out;
- struct xfrm_userspi_info *userspi;
- u_int32_t received_spi = 0;
- size_t len;
-
- memset(&request, 0, sizeof(request));
-
- hdr = &request.hdr;
- hdr->nlmsg_flags = NLM_F_REQUEST;
- hdr->nlmsg_type = XFRM_MSG_ALLOCSPI;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userspi_info));
-
- userspi = NLMSG_DATA(hdr);
- host2xfrm(src, &userspi->info.saddr);
- host2xfrm(dst, &userspi->info.id.daddr);
- userspi->info.id.proto = proto;
- userspi->info.mode = XFRM_MODE_TUNNEL;
- userspi->info.family = src->get_family(src);
- userspi->min = min;
- userspi->max = max;
-
- if (this->socket_xfrm->send(this->socket_xfrm, hdr, &out, &len) == SUCCESS)
- {
- hdr = out;
- while (NLMSG_OK(hdr, len))
- {
- switch (hdr->nlmsg_type)
- {
- case XFRM_MSG_NEWSA:
- {
- struct xfrm_usersa_info* usersa = NLMSG_DATA(hdr);
- received_spi = usersa->id.spi;
- break;
- }
- case NLMSG_ERROR:
- {
- struct nlmsgerr *err = NLMSG_DATA(hdr);
- DBG1(DBG_KNL, "allocating SPI failed: %s (%d)",
- strerror(-err->error), -err->error);
- break;
- }
- default:
- hdr = NLMSG_NEXT(hdr, len);
- continue;
- case NLMSG_DONE:
- break;
- }
- break;
- }
- free(out);
- }
-
- if (received_spi == 0)
- {
- return FAILED;
- }
-
- *spi = received_spi;
- return SUCCESS;
-}
-
-METHOD(kernel_ipsec_t, get_spi, status_t,
- private_kernel_netlink_ipsec_t *this, host_t *src, host_t *dst,
- u_int8_t protocol, u_int32_t *spi)
-{
- if (get_spi_internal(this, src, dst, protocol,
- 0xc0000000, 0xcFFFFFFF, spi) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to get SPI");
- return FAILED;
- }
-
- DBG2(DBG_KNL, "got SPI %.8x", ntohl(*spi));
- return SUCCESS;
-}
-
-METHOD(kernel_ipsec_t, get_cpi, status_t,
- private_kernel_netlink_ipsec_t *this, host_t *src, host_t *dst,
- u_int16_t *cpi)
-{
- u_int32_t received_spi = 0;
-
- if (get_spi_internal(this, src, dst, IPPROTO_COMP,
- 0x100, 0xEFFF, &received_spi) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to get CPI");
- return FAILED;
- }
-
- *cpi = htons((u_int16_t)ntohl(received_spi));
-
- DBG2(DBG_KNL, "got CPI %.4x", ntohs(*cpi));
- return SUCCESS;
-}
-
-/**
- * Add a XFRM mark to message if required
- */
-static bool add_mark(struct nlmsghdr *hdr, int buflen, mark_t mark)
-{
- if (mark.value)
- {
- struct xfrm_mark *xmrk;
-
- xmrk = netlink_reserve(hdr, buflen, XFRMA_MARK, sizeof(*xmrk));
- if (!xmrk)
- {
- return FALSE;
- }
- xmrk->v = mark.value;
- xmrk->m = mark.mask;
- }
- return TRUE;
-}
-
-METHOD(kernel_ipsec_t, add_sa, status_t,
- private_kernel_netlink_ipsec_t *this, host_t *src, host_t *dst,
- u_int32_t spi, u_int8_t protocol, u_int32_t reqid, mark_t mark,
- u_int32_t tfc, lifetime_cfg_t *lifetime, u_int16_t enc_alg, chunk_t enc_key,
- u_int16_t int_alg, chunk_t int_key, ipsec_mode_t mode,
- u_int16_t ipcomp, u_int16_t cpi, u_int32_t replay_window,
- bool initiator, bool encap, bool esn, bool inbound, bool update,
- linked_list_t* src_ts, linked_list_t* dst_ts)
-{
- netlink_buf_t request;
- char *alg_name;
- struct nlmsghdr *hdr;
- struct xfrm_usersa_info *sa;
- u_int16_t icv_size = 64;
- ipsec_mode_t original_mode = mode;
- traffic_selector_t *first_src_ts, *first_dst_ts;
- status_t status = FAILED;
-
- /* if IPComp is used, we install an additional IPComp SA. if the cpi is 0
- * we are in the recursive call below */
- if (ipcomp != IPCOMP_NONE && cpi != 0)
- {
- lifetime_cfg_t lft = {{0,0,0},{0,0,0},{0,0,0}};
- add_sa(this, src, dst, htonl(ntohs(cpi)), IPPROTO_COMP, reqid, mark,
- tfc, &lft, ENCR_UNDEFINED, chunk_empty, AUTH_UNDEFINED,
- chunk_empty, mode, ipcomp, 0, 0, initiator, FALSE, FALSE,
- inbound, update, src_ts, dst_ts);
- ipcomp = IPCOMP_NONE;
- /* use transport mode ESP SA, IPComp uses tunnel mode */
- mode = MODE_TRANSPORT;
- }
-
- memset(&request, 0, sizeof(request));
-
- DBG2(DBG_KNL, "adding SAD entry with SPI %.8x and reqid {%u} (mark "
- "%u/0x%08x)", ntohl(spi), reqid, mark.value, mark.mask);
-
- hdr = &request.hdr;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- hdr->nlmsg_type = update ? XFRM_MSG_UPDSA : XFRM_MSG_NEWSA;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_info));
-
- sa = NLMSG_DATA(hdr);
- host2xfrm(src, &sa->saddr);
- host2xfrm(dst, &sa->id.daddr);
- sa->id.spi = spi;
- sa->id.proto = protocol;
- sa->family = src->get_family(src);
- sa->mode = mode2kernel(mode);
- switch (mode)
- {
- case MODE_TUNNEL:
- sa->flags |= XFRM_STATE_AF_UNSPEC;
- break;
- case MODE_BEET:
- case MODE_TRANSPORT:
- if (original_mode == MODE_TUNNEL)
- { /* don't install selectors for switched SAs. because only one
- * selector can be installed other traffic would get dropped */
- break;
- }
- if (src_ts->get_first(src_ts, (void**)&first_src_ts) == SUCCESS &&
- dst_ts->get_first(dst_ts, (void**)&first_dst_ts) == SUCCESS)
- {
- sa->sel = ts2selector(first_src_ts, first_dst_ts);
- if (!this->proto_port_transport)
- {
- /* don't install proto/port on SA. This would break
- * potential secondary SAs for the same address using a
- * different prot/port. */
- sa->sel.proto = 0;
- sa->sel.dport = sa->sel.dport_mask = 0;
- sa->sel.sport = sa->sel.sport_mask = 0;
- }
- }
- break;
- default:
- break;
- }
-
- sa->reqid = reqid;
- sa->lft.soft_byte_limit = XFRM_LIMIT(lifetime->bytes.rekey);
- sa->lft.hard_byte_limit = XFRM_LIMIT(lifetime->bytes.life);
- sa->lft.soft_packet_limit = XFRM_LIMIT(lifetime->packets.rekey);
- sa->lft.hard_packet_limit = XFRM_LIMIT(lifetime->packets.life);
- /* we use lifetimes since added, not since used */
- sa->lft.soft_add_expires_seconds = lifetime->time.rekey;
- sa->lft.hard_add_expires_seconds = lifetime->time.life;
- sa->lft.soft_use_expires_seconds = 0;
- sa->lft.hard_use_expires_seconds = 0;
-
- switch (enc_alg)
- {
- case ENCR_UNDEFINED:
- /* no encryption */
- break;
- case ENCR_AES_CCM_ICV16:
- case ENCR_AES_GCM_ICV16:
- case ENCR_NULL_AUTH_AES_GMAC:
- case ENCR_CAMELLIA_CCM_ICV16:
- case ENCR_CHACHA20_POLY1305:
- icv_size += 32;
- /* FALL */
- case ENCR_AES_CCM_ICV12:
- case ENCR_AES_GCM_ICV12:
- case ENCR_CAMELLIA_CCM_ICV12:
- icv_size += 32;
- /* FALL */
- case ENCR_AES_CCM_ICV8:
- case ENCR_AES_GCM_ICV8:
- case ENCR_CAMELLIA_CCM_ICV8:
- {
- struct xfrm_algo_aead *algo;
-
- alg_name = lookup_algorithm(ENCRYPTION_ALGORITHM, enc_alg);
- if (alg_name == NULL)
- {
- DBG1(DBG_KNL, "algorithm %N not supported by kernel!",
- encryption_algorithm_names, enc_alg);
- goto failed;
- }
- DBG2(DBG_KNL, " using encryption algorithm %N with key size %d",
- encryption_algorithm_names, enc_alg, enc_key.len * 8);
-
- algo = netlink_reserve(hdr, sizeof(request), XFRMA_ALG_AEAD,
- sizeof(*algo) + enc_key.len);
- if (!algo)
- {
- goto failed;
- }
- algo->alg_key_len = enc_key.len * 8;
- algo->alg_icv_len = icv_size;
- strncpy(algo->alg_name, alg_name, sizeof(algo->alg_name));
- algo->alg_name[sizeof(algo->alg_name) - 1] = '\0';
- memcpy(algo->alg_key, enc_key.ptr, enc_key.len);
- break;
- }
- default:
- {
- struct xfrm_algo *algo;
-
- alg_name = lookup_algorithm(ENCRYPTION_ALGORITHM, enc_alg);
- if (alg_name == NULL)
- {
- DBG1(DBG_KNL, "algorithm %N not supported by kernel!",
- encryption_algorithm_names, enc_alg);
- goto failed;
- }
- DBG2(DBG_KNL, " using encryption algorithm %N with key size %d",
- encryption_algorithm_names, enc_alg, enc_key.len * 8);
-
- algo = netlink_reserve(hdr, sizeof(request), XFRMA_ALG_CRYPT,
- sizeof(*algo) + enc_key.len);
- if (!algo)
- {
- goto failed;
- }
- algo->alg_key_len = enc_key.len * 8;
- strncpy(algo->alg_name, alg_name, sizeof(algo->alg_name));
- algo->alg_name[sizeof(algo->alg_name) - 1] = '\0';
- memcpy(algo->alg_key, enc_key.ptr, enc_key.len);
- }
- }
-
- if (int_alg != AUTH_UNDEFINED)
- {
- u_int trunc_len = 0;
-
- alg_name = lookup_algorithm(INTEGRITY_ALGORITHM, int_alg);
- if (alg_name == NULL)
- {
- DBG1(DBG_KNL, "algorithm %N not supported by kernel!",
- integrity_algorithm_names, int_alg);
- goto failed;
- }
- DBG2(DBG_KNL, " using integrity algorithm %N with key size %d",
- integrity_algorithm_names, int_alg, int_key.len * 8);
-
- switch (int_alg)
- {
- case AUTH_HMAC_MD5_128:
- case AUTH_HMAC_SHA2_256_128:
- trunc_len = 128;
- break;
- case AUTH_HMAC_SHA1_160:
- trunc_len = 160;
- break;
- default:
- break;
- }
-
- if (trunc_len)
- {
- struct xfrm_algo_auth* algo;
-
- /* the kernel uses SHA256 with 96 bit truncation by default,
- * use specified truncation size supported by newer kernels.
- * also use this for untruncated MD5 and SHA1. */
- algo = netlink_reserve(hdr, sizeof(request), XFRMA_ALG_AUTH_TRUNC,
- sizeof(*algo) + int_key.len);
- if (!algo)
- {
- goto failed;
- }
- algo->alg_key_len = int_key.len * 8;
- algo->alg_trunc_len = trunc_len;
- strncpy(algo->alg_name, alg_name, sizeof(algo->alg_name));
- algo->alg_name[sizeof(algo->alg_name) - 1] = '\0';
- memcpy(algo->alg_key, int_key.ptr, int_key.len);
- }
- else
- {
- struct xfrm_algo* algo;
-
- algo = netlink_reserve(hdr, sizeof(request), XFRMA_ALG_AUTH,
- sizeof(*algo) + int_key.len);
- if (!algo)
- {
- goto failed;
- }
- algo->alg_key_len = int_key.len * 8;
- strncpy(algo->alg_name, alg_name, sizeof(algo->alg_name));
- algo->alg_name[sizeof(algo->alg_name) - 1] = '\0';
- memcpy(algo->alg_key, int_key.ptr, int_key.len);
- }
- }
-
- if (ipcomp != IPCOMP_NONE)
- {
- struct xfrm_algo* algo;
-
- alg_name = lookup_algorithm(COMPRESSION_ALGORITHM, ipcomp);
- if (alg_name == NULL)
- {
- DBG1(DBG_KNL, "algorithm %N not supported by kernel!",
- ipcomp_transform_names, ipcomp);
- goto failed;
- }
- DBG2(DBG_KNL, " using compression algorithm %N",
- ipcomp_transform_names, ipcomp);
-
- algo = netlink_reserve(hdr, sizeof(request), XFRMA_ALG_COMP,
- sizeof(*algo));
- if (!algo)
- {
- goto failed;
- }
- algo->alg_key_len = 0;
- strncpy(algo->alg_name, alg_name, sizeof(algo->alg_name));
- algo->alg_name[sizeof(algo->alg_name) - 1] = '\0';
- }
-
- if (encap)
- {
- struct xfrm_encap_tmpl *tmpl;
-
- tmpl = netlink_reserve(hdr, sizeof(request), XFRMA_ENCAP, sizeof(*tmpl));
- if (!tmpl)
- {
- goto failed;
- }
- tmpl->encap_type = UDP_ENCAP_ESPINUDP;
- tmpl->encap_sport = htons(src->get_port(src));
- tmpl->encap_dport = htons(dst->get_port(dst));
- memset(&tmpl->encap_oa, 0, sizeof (xfrm_address_t));
- /* encap_oa could probably be derived from the
- * traffic selectors [rfc4306, p39]. In the netlink kernel
- * implementation pluto does the same as we do here but it uses
- * encap_oa in the pfkey implementation.
- * BUT as /usr/src/linux/net/key/af_key.c indicates the kernel ignores
- * it anyway
- * -> does that mean that NAT-T encap doesn't work in transport mode?
- * No. The reason the kernel ignores NAT-OA is that it recomputes
- * (or, rather, just ignores) the checksum. If packets pass the IPsec
- * checks it marks them "checksum ok" so OA isn't needed. */
- }
-
- if (!add_mark(hdr, sizeof(request), mark))
- {
- goto failed;
- }
-
- if (tfc && protocol == IPPROTO_ESP && mode == MODE_TUNNEL)
- { /* the kernel supports TFC padding only for tunnel mode ESP SAs */
- u_int32_t *tfcpad;
-
- tfcpad = netlink_reserve(hdr, sizeof(request), XFRMA_TFCPAD,
- sizeof(*tfcpad));
- if (!tfcpad)
- {
- goto failed;
- }
- *tfcpad = tfc;
- }
-
- if (protocol != IPPROTO_COMP)
- {
- if (replay_window != 0 && (esn || replay_window > 32))
- {
- /* for ESN or larger replay windows we need the new
- * XFRMA_REPLAY_ESN_VAL attribute to configure a bitmap */
- struct xfrm_replay_state_esn *replay;
- u_int32_t bmp_size;
-
- bmp_size = round_up(replay_window, sizeof(u_int32_t) * 8) / 8;
- replay = netlink_reserve(hdr, sizeof(request), XFRMA_REPLAY_ESN_VAL,
- sizeof(*replay) + bmp_size);
- if (!replay)
- {
- goto failed;
- }
- /* bmp_len contains number uf __u32's */
- replay->bmp_len = bmp_size / sizeof(u_int32_t);
- replay->replay_window = replay_window;
- DBG2(DBG_KNL, " using replay window of %u packets", replay_window);
-
- if (esn)
- {
- DBG2(DBG_KNL, " using extended sequence numbers (ESN)");
- sa->flags |= XFRM_STATE_ESN;
- }
- }
- else
- {
- DBG2(DBG_KNL, " using replay window of %u packets", replay_window);
- sa->replay_window = replay_window;
- }
- }
-
- if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS)
- {
- if (mark.value)
- {
- DBG1(DBG_KNL, "unable to add SAD entry with SPI %.8x "
- "(mark %u/0x%08x)", ntohl(spi), mark.value, mark.mask);
- }
- else
- {
- DBG1(DBG_KNL, "unable to add SAD entry with SPI %.8x", ntohl(spi));
- }
- goto failed;
- }
-
- status = SUCCESS;
-
-failed:
- memwipe(&request, sizeof(request));
- return status;
-}
-
-/**
- * Get the ESN replay state (i.e. sequence numbers) of an SA.
- *
- * Allocates into one the replay state structure we get from the kernel.
- */
-static void get_replay_state(private_kernel_netlink_ipsec_t *this,
- u_int32_t spi, u_int8_t protocol,
- host_t *dst, mark_t mark,
- struct xfrm_replay_state_esn **replay_esn,
- u_int32_t *replay_esn_len,
- struct xfrm_replay_state **replay,
- struct xfrm_lifetime_cur **lifetime)
-{
- netlink_buf_t request;
- struct nlmsghdr *hdr, *out = NULL;
- struct xfrm_aevent_id *out_aevent = NULL, *aevent_id;
- size_t len;
- struct rtattr *rta;
- size_t rtasize;
-
- memset(&request, 0, sizeof(request));
-
- DBG2(DBG_KNL, "querying replay state from SAD entry with SPI %.8x",
- ntohl(spi));
-
- hdr = &request.hdr;
- hdr->nlmsg_flags = NLM_F_REQUEST;
- hdr->nlmsg_type = XFRM_MSG_GETAE;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
-
- aevent_id = NLMSG_DATA(hdr);
- aevent_id->flags = XFRM_AE_RVAL;
-
- host2xfrm(dst, &aevent_id->sa_id.daddr);
- aevent_id->sa_id.spi = spi;
- aevent_id->sa_id.proto = protocol;
- aevent_id->sa_id.family = dst->get_family(dst);
-
- if (!add_mark(hdr, sizeof(request), mark))
- {
- return;
- }
-
- if (this->socket_xfrm->send(this->socket_xfrm, hdr, &out, &len) == SUCCESS)
- {
- hdr = out;
- while (NLMSG_OK(hdr, len))
- {
- switch (hdr->nlmsg_type)
- {
- case XFRM_MSG_NEWAE:
- {
- out_aevent = NLMSG_DATA(hdr);
- break;
- }
- case NLMSG_ERROR:
- {
- struct nlmsgerr *err = NLMSG_DATA(hdr);
- DBG1(DBG_KNL, "querying replay state from SAD entry "
- "failed: %s (%d)", strerror(-err->error),
- -err->error);
- break;
- }
- default:
- hdr = NLMSG_NEXT(hdr, len);
- continue;
- case NLMSG_DONE:
- break;
- }
- break;
- }
- }
-
- if (out_aevent)
- {
- rta = XFRM_RTA(out, struct xfrm_aevent_id);
- rtasize = XFRM_PAYLOAD(out, struct xfrm_aevent_id);
- while (RTA_OK(rta, rtasize))
- {
- if (rta->rta_type == XFRMA_LTIME_VAL &&
- RTA_PAYLOAD(rta) == sizeof(**lifetime))
- {
- free(*lifetime);
- *lifetime = malloc(RTA_PAYLOAD(rta));
- memcpy(*lifetime, RTA_DATA(rta), RTA_PAYLOAD(rta));
- }
- if (rta->rta_type == XFRMA_REPLAY_VAL &&
- RTA_PAYLOAD(rta) == sizeof(**replay))
- {
- free(*replay);
- *replay = malloc(RTA_PAYLOAD(rta));
- memcpy(*replay, RTA_DATA(rta), RTA_PAYLOAD(rta));
- }
- if (rta->rta_type == XFRMA_REPLAY_ESN_VAL &&
- RTA_PAYLOAD(rta) >= sizeof(**replay_esn))
- {
- free(*replay_esn);
- *replay_esn = malloc(RTA_PAYLOAD(rta));
- *replay_esn_len = RTA_PAYLOAD(rta);
- memcpy(*replay_esn, RTA_DATA(rta), RTA_PAYLOAD(rta));
- }
- rta = RTA_NEXT(rta, rtasize);
- }
- }
- free(out);
-}
-
-METHOD(kernel_ipsec_t, query_sa, status_t,
- private_kernel_netlink_ipsec_t *this, host_t *src, host_t *dst,
- u_int32_t spi, u_int8_t protocol, mark_t mark,
- u_int64_t *bytes, u_int64_t *packets, time_t *time)
-{
- netlink_buf_t request;
- struct nlmsghdr *out = NULL, *hdr;
- struct xfrm_usersa_id *sa_id;
- struct xfrm_usersa_info *sa = NULL;
- status_t status = FAILED;
- size_t len;
-
- memset(&request, 0, sizeof(request));
-
- DBG2(DBG_KNL, "querying SAD entry with SPI %.8x (mark %u/0x%08x)",
- ntohl(spi), mark.value, mark.mask);
-
- hdr = &request.hdr;
- hdr->nlmsg_flags = NLM_F_REQUEST;
- hdr->nlmsg_type = XFRM_MSG_GETSA;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_id));
-
- sa_id = NLMSG_DATA(hdr);
- host2xfrm(dst, &sa_id->daddr);
- sa_id->spi = spi;
- sa_id->proto = protocol;
- sa_id->family = dst->get_family(dst);
-
- if (!add_mark(hdr, sizeof(request), mark))
- {
- return FAILED;
- }
-
- if (this->socket_xfrm->send(this->socket_xfrm, hdr, &out, &len) == SUCCESS)
- {
- hdr = out;
- while (NLMSG_OK(hdr, len))
- {
- switch (hdr->nlmsg_type)
- {
- case XFRM_MSG_NEWSA:
- {
- sa = NLMSG_DATA(hdr);
- break;
- }
- case NLMSG_ERROR:
- {
- struct nlmsgerr *err = NLMSG_DATA(hdr);
-
- if (mark.value)
- {
- DBG1(DBG_KNL, "querying SAD entry with SPI %.8x "
- "(mark %u/0x%08x) failed: %s (%d)",
- ntohl(spi), mark.value, mark.mask,
- strerror(-err->error), -err->error);
- }
- else
- {
- DBG1(DBG_KNL, "querying SAD entry with SPI %.8x "
- "failed: %s (%d)", ntohl(spi),
- strerror(-err->error), -err->error);
- }
- break;
- }
- default:
- hdr = NLMSG_NEXT(hdr, len);
- continue;
- case NLMSG_DONE:
- break;
- }
- break;
- }
- }
-
- if (sa == NULL)
- {
- DBG2(DBG_KNL, "unable to query SAD entry with SPI %.8x", ntohl(spi));
- }
- else
- {
- if (bytes)
- {
- *bytes = sa->curlft.bytes;
- }
- if (packets)
- {
- *packets = sa->curlft.packets;
- }
- if (time)
- { /* curlft contains an "use" time, but that contains a timestamp
- * of the first use, not the last. Last use time must be queried
- * on the policy on Linux */
- *time = 0;
- }
- status = SUCCESS;
- }
- memwipe(out, len);
- free(out);
- return status;
-}
-
-METHOD(kernel_ipsec_t, del_sa, status_t,
- private_kernel_netlink_ipsec_t *this, host_t *src, host_t *dst,
- u_int32_t spi, u_int8_t protocol, u_int16_t cpi, mark_t mark)
-{
- netlink_buf_t request;
- struct nlmsghdr *hdr;
- struct xfrm_usersa_id *sa_id;
-
- /* if IPComp was used, we first delete the additional IPComp SA */
- if (cpi)
- {
- del_sa(this, src, dst, htonl(ntohs(cpi)), IPPROTO_COMP, 0, mark);
- }
-
- memset(&request, 0, sizeof(request));
-
- DBG2(DBG_KNL, "deleting SAD entry with SPI %.8x (mark %u/0x%08x)",
- ntohl(spi), mark.value, mark.mask);
-
- hdr = &request.hdr;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- hdr->nlmsg_type = XFRM_MSG_DELSA;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_id));
-
- sa_id = NLMSG_DATA(hdr);
- host2xfrm(dst, &sa_id->daddr);
- sa_id->spi = spi;
- sa_id->proto = protocol;
- sa_id->family = dst->get_family(dst);
-
- if (!add_mark(hdr, sizeof(request), mark))
- {
- return FAILED;
- }
-
- switch (this->socket_xfrm->send_ack(this->socket_xfrm, hdr))
- {
- case SUCCESS:
- DBG2(DBG_KNL, "deleted SAD entry with SPI %.8x (mark %u/0x%08x)",
- ntohl(spi), mark.value, mark.mask);
- return SUCCESS;
- case NOT_FOUND:
- return NOT_FOUND;
- default:
- if (mark.value)
- {
- DBG1(DBG_KNL, "unable to delete SAD entry with SPI %.8x "
- "(mark %u/0x%08x)", ntohl(spi), mark.value, mark.mask);
- }
- else
- {
- DBG1(DBG_KNL, "unable to delete SAD entry with SPI %.8x",
- ntohl(spi));
- }
- return FAILED;
- }
-}
-
-METHOD(kernel_ipsec_t, update_sa, status_t,
- private_kernel_netlink_ipsec_t *this, u_int32_t spi, u_int8_t protocol,
- u_int16_t cpi, host_t *src, host_t *dst, host_t *new_src, host_t *new_dst,
- bool old_encap, bool new_encap, mark_t mark)
-{
- netlink_buf_t request;
- struct nlmsghdr *hdr, *out = NULL;
- struct xfrm_usersa_id *sa_id;
- struct xfrm_usersa_info *out_sa = NULL, *sa;
- size_t len;
- struct rtattr *rta;
- size_t rtasize;
- struct xfrm_encap_tmpl* tmpl = NULL;
- struct xfrm_replay_state *replay = NULL;
- struct xfrm_replay_state_esn *replay_esn = NULL;
- struct xfrm_lifetime_cur *lifetime = NULL;
- u_int32_t replay_esn_len = 0;
- status_t status = FAILED;
-
- /* if IPComp is used, we first update the IPComp SA */
- if (cpi)
- {
- update_sa(this, htonl(ntohs(cpi)), IPPROTO_COMP, 0,
- src, dst, new_src, new_dst, FALSE, FALSE, mark);
- }
-
- memset(&request, 0, sizeof(request));
-
- DBG2(DBG_KNL, "querying SAD entry with SPI %.8x for update", ntohl(spi));
-
- /* query the existing SA first */
- hdr = &request.hdr;
- hdr->nlmsg_flags = NLM_F_REQUEST;
- hdr->nlmsg_type = XFRM_MSG_GETSA;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_id));
-
- sa_id = NLMSG_DATA(hdr);
- host2xfrm(dst, &sa_id->daddr);
- sa_id->spi = spi;
- sa_id->proto = protocol;
- sa_id->family = dst->get_family(dst);
-
- if (!add_mark(hdr, sizeof(request), mark))
- {
- return FAILED;
- }
-
- if (this->socket_xfrm->send(this->socket_xfrm, hdr, &out, &len) == SUCCESS)
- {
- hdr = out;
- while (NLMSG_OK(hdr, len))
- {
- switch (hdr->nlmsg_type)
- {
- case XFRM_MSG_NEWSA:
- {
- out_sa = NLMSG_DATA(hdr);
- break;
- }
- case NLMSG_ERROR:
- {
- struct nlmsgerr *err = NLMSG_DATA(hdr);
- DBG1(DBG_KNL, "querying SAD entry failed: %s (%d)",
- strerror(-err->error), -err->error);
- break;
- }
- default:
- hdr = NLMSG_NEXT(hdr, len);
- continue;
- case NLMSG_DONE:
- break;
- }
- break;
- }
- }
- if (out_sa == NULL)
- {
- DBG1(DBG_KNL, "unable to update SAD entry with SPI %.8x", ntohl(spi));
- goto failed;
- }
-
- get_replay_state(this, spi, protocol, dst, mark, &replay_esn,
- &replay_esn_len, &replay, &lifetime);
-
- /* delete the old SA (without affecting the IPComp SA) */
- if (del_sa(this, src, dst, spi, protocol, 0, mark) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to delete old SAD entry with SPI %.8x",
- ntohl(spi));
- goto failed;
- }
-
- DBG2(DBG_KNL, "updating SAD entry with SPI %.8x from %#H..%#H to %#H..%#H",
- ntohl(spi), src, dst, new_src, new_dst);
- /* copy over the SA from out to request */
- hdr = &request.hdr;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- hdr->nlmsg_type = XFRM_MSG_NEWSA;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_info));
- sa = NLMSG_DATA(hdr);
- memcpy(sa, NLMSG_DATA(out), sizeof(struct xfrm_usersa_info));
- sa->family = new_dst->get_family(new_dst);
-
- if (!src->ip_equals(src, new_src))
- {
- host2xfrm(new_src, &sa->saddr);
- }
- if (!dst->ip_equals(dst, new_dst))
- {
- host2xfrm(new_dst, &sa->id.daddr);
- }
-
- rta = XFRM_RTA(out, struct xfrm_usersa_info);
- rtasize = XFRM_PAYLOAD(out, struct xfrm_usersa_info);
- while (RTA_OK(rta, rtasize))
- {
- /* copy all attributes, but not XFRMA_ENCAP if we are disabling it */
- if (rta->rta_type != XFRMA_ENCAP || new_encap)
- {
- if (rta->rta_type == XFRMA_ENCAP)
- { /* update encap tmpl */
- tmpl = RTA_DATA(rta);
- tmpl->encap_sport = ntohs(new_src->get_port(new_src));
- tmpl->encap_dport = ntohs(new_dst->get_port(new_dst));
- }
- netlink_add_attribute(hdr, rta->rta_type,
- chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta)),
- sizeof(request));
- }
- rta = RTA_NEXT(rta, rtasize);
- }
-
- if (tmpl == NULL && new_encap)
- { /* add tmpl if we are enabling it */
- tmpl = netlink_reserve(hdr, sizeof(request), XFRMA_ENCAP, sizeof(*tmpl));
- if (!tmpl)
- {
- goto failed;
- }
- tmpl->encap_type = UDP_ENCAP_ESPINUDP;
- tmpl->encap_sport = ntohs(new_src->get_port(new_src));
- tmpl->encap_dport = ntohs(new_dst->get_port(new_dst));
- memset(&tmpl->encap_oa, 0, sizeof (xfrm_address_t));
- }
-
- if (replay_esn)
- {
- struct xfrm_replay_state_esn *state;
-
- state = netlink_reserve(hdr, sizeof(request), XFRMA_REPLAY_ESN_VAL,
- replay_esn_len);
- if (!state)
- {
- goto failed;
- }
- memcpy(state, replay_esn, replay_esn_len);
- }
- else if (replay)
- {
- struct xfrm_replay_state *state;
-
- state = netlink_reserve(hdr, sizeof(request), XFRMA_REPLAY_VAL,
- sizeof(*state));
- if (!state)
- {
- goto failed;
- }
- memcpy(state, replay, sizeof(*state));
- }
- else
- {
- DBG1(DBG_KNL, "unable to copy replay state from old SAD entry with "
- "SPI %.8x", ntohl(spi));
- }
- if (lifetime)
- {
- struct xfrm_lifetime_cur *state;
-
- state = netlink_reserve(hdr, sizeof(request), XFRMA_LTIME_VAL,
- sizeof(*state));
- if (!state)
- {
- goto failed;
- }
- memcpy(state, lifetime, sizeof(*state));
- }
- else
- {
- DBG1(DBG_KNL, "unable to copy usage stats from old SAD entry with "
- "SPI %.8x", ntohl(spi));
- }
-
- if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to update SAD entry with SPI %.8x", ntohl(spi));
- goto failed;
- }
-
- status = SUCCESS;
-failed:
- free(replay);
- free(replay_esn);
- free(lifetime);
- memwipe(out, len);
- memwipe(&request, sizeof(request));
- free(out);
-
- return status;
-}
-
-METHOD(kernel_ipsec_t, flush_sas, status_t,
- private_kernel_netlink_ipsec_t *this)
-{
- netlink_buf_t request;
- struct nlmsghdr *hdr;
- struct xfrm_usersa_flush *flush;
- struct {
- u_int8_t proto;
- char *name;
- } protos[] = {
- { IPPROTO_AH, "AH" },
- { IPPROTO_ESP, "ESP" },
- { IPPROTO_COMP, "IPComp" },
- };
- int i;
-
- memset(&request, 0, sizeof(request));
-
- hdr = &request.hdr;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- hdr->nlmsg_type = XFRM_MSG_FLUSHSA;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush));
-
- flush = NLMSG_DATA(hdr);
-
- for (i = 0; i < countof(protos); i++)
- {
- DBG2(DBG_KNL, "flushing all %s SAD entries", protos[i].name);
-
- flush->proto = protos[i].proto;
-
- if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to flush %s SAD entries", protos[i].name);
- return FAILED;
- }
- }
- return SUCCESS;
-}
-
-/**
- * Add or update a policy in the kernel.
- *
- * Note: The mutex has to be locked when entering this function
- * and is unlocked here in any case.
- */
-static status_t add_policy_internal(private_kernel_netlink_ipsec_t *this,
- policy_entry_t *policy, policy_sa_t *mapping, bool update)
-{
- netlink_buf_t request;
- policy_entry_t clone;
- ipsec_sa_t *ipsec = mapping->sa;
- struct xfrm_userpolicy_info *policy_info;
- struct nlmsghdr *hdr;
- status_t status;
- int i;
-
- /* clone the policy so we are able to check it out again later */
- memcpy(&clone, policy, sizeof(policy_entry_t));
-
- memset(&request, 0, sizeof(request));
- hdr = &request.hdr;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- hdr->nlmsg_type = update ? XFRM_MSG_UPDPOLICY : XFRM_MSG_NEWPOLICY;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userpolicy_info));
-
- policy_info = NLMSG_DATA(hdr);
- policy_info->sel = policy->sel;
- policy_info->dir = policy->direction;
-
- /* calculate priority based on selector size, small size = high prio */
- policy_info->priority = mapping->priority;
- policy_info->action = mapping->type != POLICY_DROP ? XFRM_POLICY_ALLOW
- : XFRM_POLICY_BLOCK;
- policy_info->share = XFRM_SHARE_ANY;
-
- /* policies don't expire */
- policy_info->lft.soft_byte_limit = XFRM_INF;
- policy_info->lft.soft_packet_limit = XFRM_INF;
- policy_info->lft.hard_byte_limit = XFRM_INF;
- policy_info->lft.hard_packet_limit = XFRM_INF;
- policy_info->lft.soft_add_expires_seconds = 0;
- policy_info->lft.hard_add_expires_seconds = 0;
- policy_info->lft.soft_use_expires_seconds = 0;
- policy_info->lft.hard_use_expires_seconds = 0;
-
- if (mapping->type == POLICY_IPSEC)
- {
- struct xfrm_user_tmpl *tmpl;
- struct {
- u_int8_t proto;
- bool use;
- } protos[] = {
- { IPPROTO_COMP, ipsec->cfg.ipcomp.transform != IPCOMP_NONE },
- { IPPROTO_ESP, ipsec->cfg.esp.use },
- { IPPROTO_AH, ipsec->cfg.ah.use },
- };
- ipsec_mode_t proto_mode = ipsec->cfg.mode;
- int count = 0;
-
- for (i = 0; i < countof(protos); i++)
- {
- if (protos[i].use)
- {
- count++;
- }
- }
- tmpl = netlink_reserve(hdr, sizeof(request), XFRMA_TMPL,
- count * sizeof(*tmpl));
- if (!tmpl)
- {
- this->mutex->unlock(this->mutex);
- return FAILED;
- }
-
- for (i = 0; i < countof(protos); i++)
- {
- if (!protos[i].use)
- {
- continue;
- }
- tmpl->reqid = ipsec->cfg.reqid;
- tmpl->id.proto = protos[i].proto;
- tmpl->aalgos = tmpl->ealgos = tmpl->calgos = ~0;
- tmpl->mode = mode2kernel(proto_mode);
- tmpl->optional = protos[i].proto == IPPROTO_COMP &&
- policy->direction != POLICY_OUT;
- tmpl->family = ipsec->src->get_family(ipsec->src);
-
- if (proto_mode == MODE_TUNNEL || proto_mode == MODE_BEET)
- { /* only for tunnel mode */
- host2xfrm(ipsec->src, &tmpl->saddr);
- host2xfrm(ipsec->dst, &tmpl->id.daddr);
- }
-
- tmpl++;
-
- /* use transport mode for other SAs */
- proto_mode = MODE_TRANSPORT;
- }
- }
-
- if (!add_mark(hdr, sizeof(request), ipsec->mark))
- {
- this->mutex->unlock(this->mutex);
- return FAILED;
- }
- this->mutex->unlock(this->mutex);
-
- status = this->socket_xfrm->send_ack(this->socket_xfrm, hdr);
- if (status == ALREADY_DONE && !update)
- {
- DBG1(DBG_KNL, "policy already exists, try to update it");
- hdr->nlmsg_type = XFRM_MSG_UPDPOLICY;
- status = this->socket_xfrm->send_ack(this->socket_xfrm, hdr);
- }
- if (status != SUCCESS)
- {
- return FAILED;
- }
-
- /* find the policy again */
- this->mutex->lock(this->mutex);
- policy = this->policies->get(this->policies, &clone);
- if (!policy ||
- policy->used_by->find_first(policy->used_by,
- NULL, (void**)&mapping) != SUCCESS)
- { /* policy or mapping is already gone, ignore */
- this->mutex->unlock(this->mutex);
- return SUCCESS;
- }
-
- /* install a route, if:
- * - this is a forward policy (to just get one for each child)
- * - we are in tunnel/BEET mode or install a bypass policy
- * - routing is not disabled via strongswan.conf
- */
- if (policy->direction == POLICY_FWD && this->install_routes &&
- (mapping->type != POLICY_IPSEC || ipsec->cfg.mode != MODE_TRANSPORT))
- {
- policy_sa_fwd_t *fwd = (policy_sa_fwd_t*)mapping;
- route_entry_t *route;
- host_t *iface;
-
- INIT(route,
- .prefixlen = policy->sel.prefixlen_s,
- );
-
- if (hydra->kernel_interface->get_address_by_ts(hydra->kernel_interface,
- fwd->dst_ts, &route->src_ip, NULL) == SUCCESS)
- {
- /* get the nexthop to src (src as we are in POLICY_FWD) */
- if (!ipsec->src->is_anyaddr(ipsec->src))
- {
- route->gateway = hydra->kernel_interface->get_nexthop(
- hydra->kernel_interface, ipsec->src,
- -1, ipsec->dst);
- }
- else
- { /* for shunt policies */
- iface = xfrm2host(policy->sel.family, &policy->sel.saddr, 0);
- route->gateway = hydra->kernel_interface->get_nexthop(
- hydra->kernel_interface, iface,
- policy->sel.prefixlen_s, route->src_ip);
- iface->destroy(iface);
- }
- route->dst_net = chunk_alloc(policy->sel.family == AF_INET ? 4 : 16);
- memcpy(route->dst_net.ptr, &policy->sel.saddr, route->dst_net.len);
-
- /* get the interface to install the route for. If we have a local
- * address, use it. Otherwise (for shunt policies) use the
- * routes source address. */
- iface = ipsec->dst;
- if (iface->is_anyaddr(iface))
- {
- iface = route->src_ip;
- }
- /* install route via outgoing interface */
- if (!hydra->kernel_interface->get_interface(hydra->kernel_interface,
- iface, &route->if_name))
- {
- this->mutex->unlock(this->mutex);
- route_entry_destroy(route);
- return SUCCESS;
- }
-
- if (policy->route)
- {
- route_entry_t *old = policy->route;
- if (route_entry_equals(old, route))
- {
- this->mutex->unlock(this->mutex);
- route_entry_destroy(route);
- return SUCCESS;
- }
- /* uninstall previously installed route */
- if (hydra->kernel_interface->del_route(hydra->kernel_interface,
- old->dst_net, old->prefixlen, old->gateway,
- old->src_ip, old->if_name) != SUCCESS)
- {
- DBG1(DBG_KNL, "error uninstalling route installed with "
- "policy %R === %R %N", fwd->src_ts,
- fwd->dst_ts, policy_dir_names,
- policy->direction);
- }
- route_entry_destroy(old);
- policy->route = NULL;
- }
-
- DBG2(DBG_KNL, "installing route: %R via %H src %H dev %s",
- fwd->src_ts, route->gateway, route->src_ip, route->if_name);
- switch (hydra->kernel_interface->add_route(
- hydra->kernel_interface, route->dst_net,
- route->prefixlen, route->gateway,
- route->src_ip, route->if_name))
- {
- default:
- DBG1(DBG_KNL, "unable to install source route for %H",
- route->src_ip);
- /* FALL */
- case ALREADY_DONE:
- /* route exists, do not uninstall */
- route_entry_destroy(route);
- break;
- case SUCCESS:
- /* cache the installed route */
- policy->route = route;
- break;
- }
- }
- else
- {
- free(route);
- }
- }
- this->mutex->unlock(this->mutex);
- return SUCCESS;
-}
-
-METHOD(kernel_ipsec_t, add_policy, status_t,
- private_kernel_netlink_ipsec_t *this, host_t *src, host_t *dst,
- traffic_selector_t *src_ts, traffic_selector_t *dst_ts,
- policy_dir_t direction, policy_type_t type, ipsec_sa_cfg_t *sa,
- mark_t mark, policy_priority_t priority)
-{
- policy_entry_t *policy, *current;
- policy_sa_t *assigned_sa, *current_sa;
- enumerator_t *enumerator;
- bool found = FALSE, update = TRUE;
-
- /* create a policy */
- INIT(policy,
- .sel = ts2selector(src_ts, dst_ts),
- .mark = mark.value & mark.mask,
- .direction = direction,
- .reqid = sa->reqid,
- );
-
- /* find the policy, which matches EXACTLY */
- this->mutex->lock(this->mutex);
- current = this->policies->get(this->policies, policy);
- if (current)
- {
- if (current->reqid && sa->reqid && current->reqid != sa->reqid)
- {
- DBG1(DBG_CFG, "unable to install policy %R === %R %N (mark "
- "%u/0x%08x) for reqid %u, the same policy for reqid %u exists",
- src_ts, dst_ts, policy_dir_names, direction,
- mark.value, mark.mask, sa->reqid, current->reqid);
- policy_entry_destroy(this, policy);
- this->mutex->unlock(this->mutex);
- return INVALID_STATE;
- }
- /* use existing policy */
- DBG2(DBG_KNL, "policy %R === %R %N (mark %u/0x%08x) "
- "already exists, increasing refcount",
- src_ts, dst_ts, policy_dir_names, direction,
- mark.value, mark.mask);
- policy_entry_destroy(this, policy);
- policy = current;
- found = TRUE;
- }
- else
- { /* use the new one, if we have no such policy */
- policy->used_by = linked_list_create();
- this->policies->put(this->policies, policy, policy);
- }
-
- /* cache the assigned IPsec SA */
- assigned_sa = policy_sa_create(this, direction, type, src, dst, src_ts,
- dst_ts, mark, sa);
- assigned_sa->priority = get_priority(policy, priority);
-
- /* insert the SA according to its priority */
- enumerator = policy->used_by->create_enumerator(policy->used_by);
- while (enumerator->enumerate(enumerator, (void**)&current_sa))
- {
- if (current_sa->priority >= assigned_sa->priority)
- {
- break;
- }
- update = FALSE;
- }
- policy->used_by->insert_before(policy->used_by, enumerator,
- assigned_sa);
- enumerator->destroy(enumerator);
-
- if (!update)
- { /* we don't update the policy if the priority is lower than that of
- * the currently installed one */
- this->mutex->unlock(this->mutex);
- return SUCCESS;
- }
-
- if (this->policy_update)
- {
- found = TRUE;
- }
-
- DBG2(DBG_KNL, "%s policy %R === %R %N (mark %u/0x%08x)",
- found ? "updating" : "adding", src_ts, dst_ts,
- policy_dir_names, direction, mark.value, mark.mask);
-
- if (add_policy_internal(this, policy, assigned_sa, found) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to %s policy %R === %R %N",
- found ? "update" : "add", src_ts, dst_ts,
- policy_dir_names, direction);
- return FAILED;
- }
- return SUCCESS;
-}
-
-METHOD(kernel_ipsec_t, query_policy, status_t,
- private_kernel_netlink_ipsec_t *this, traffic_selector_t *src_ts,
- traffic_selector_t *dst_ts, policy_dir_t direction, mark_t mark,
- time_t *use_time)
-{
- netlink_buf_t request;
- struct nlmsghdr *out = NULL, *hdr;
- struct xfrm_userpolicy_id *policy_id;
- struct xfrm_userpolicy_info *policy = NULL;
- size_t len;
-
- memset(&request, 0, sizeof(request));
-
- DBG2(DBG_KNL, "querying policy %R === %R %N (mark %u/0x%08x)",
- src_ts, dst_ts, policy_dir_names, direction,
- mark.value, mark.mask);
-
- hdr = &request.hdr;
- hdr->nlmsg_flags = NLM_F_REQUEST;
- hdr->nlmsg_type = XFRM_MSG_GETPOLICY;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userpolicy_id));
-
- policy_id = NLMSG_DATA(hdr);
- policy_id->sel = ts2selector(src_ts, dst_ts);
- policy_id->dir = direction;
-
- if (!add_mark(hdr, sizeof(request), mark))
- {
- return FAILED;
- }
-
- if (this->socket_xfrm->send(this->socket_xfrm, hdr, &out, &len) == SUCCESS)
- {
- hdr = out;
- while (NLMSG_OK(hdr, len))
- {
- switch (hdr->nlmsg_type)
- {
- case XFRM_MSG_NEWPOLICY:
- {
- policy = NLMSG_DATA(hdr);
- break;
- }
- case NLMSG_ERROR:
- {
- struct nlmsgerr *err = NLMSG_DATA(hdr);
- DBG1(DBG_KNL, "querying policy failed: %s (%d)",
- strerror(-err->error), -err->error);
- break;
- }
- default:
- hdr = NLMSG_NEXT(hdr, len);
- continue;
- case NLMSG_DONE:
- break;
- }
- break;
- }
- }
-
- if (policy == NULL)
- {
- DBG2(DBG_KNL, "unable to query policy %R === %R %N", src_ts, dst_ts,
- policy_dir_names, direction);
- free(out);
- return FAILED;
- }
-
- if (policy->curlft.use_time)
- {
- /* we need the monotonic time, but the kernel returns system time. */
- *use_time = time_monotonic(NULL) - (time(NULL) - policy->curlft.use_time);
- }
- else
- {
- *use_time = 0;
- }
-
- free(out);
- return SUCCESS;
-}
-
-METHOD(kernel_ipsec_t, del_policy, status_t,
- private_kernel_netlink_ipsec_t *this, host_t *src, host_t *dst,
- traffic_selector_t *src_ts, traffic_selector_t *dst_ts,
- policy_dir_t direction, policy_type_t type, ipsec_sa_cfg_t *sa,
- mark_t mark, policy_priority_t prio)
-{
- policy_entry_t *current, policy;
- enumerator_t *enumerator;
- policy_sa_t *mapping;
- netlink_buf_t request;
- struct nlmsghdr *hdr;
- struct xfrm_userpolicy_id *policy_id;
- bool is_installed = TRUE;
- u_int32_t priority;
- ipsec_sa_t assigned_sa = {
- .src = src,
- .dst = dst,
- .mark = mark,
- .cfg = *sa,
- };
-
- DBG2(DBG_KNL, "deleting policy %R === %R %N (mark %u/0x%08x)",
- src_ts, dst_ts, policy_dir_names, direction,
- mark.value, mark.mask);
-
- /* create a policy */
- memset(&policy, 0, sizeof(policy_entry_t));
- policy.sel = ts2selector(src_ts, dst_ts);
- policy.mark = mark.value & mark.mask;
- policy.direction = direction;
-
- /* find the policy */
- this->mutex->lock(this->mutex);
- current = this->policies->get(this->policies, &policy);
- if (!current)
- {
- if (mark.value)
- {
- DBG1(DBG_KNL, "deleting policy %R === %R %N (mark %u/0x%08x) "
- "failed, not found", src_ts, dst_ts, policy_dir_names,
- direction, mark.value, mark.mask);
- }
- else
- {
- DBG1(DBG_KNL, "deleting policy %R === %R %N failed, not found",
- src_ts, dst_ts, policy_dir_names, direction);
- }
- this->mutex->unlock(this->mutex);
- return NOT_FOUND;
- }
-
- /* remove mapping to SA by reqid and priority */
- priority = get_priority(current, prio);
- enumerator = current->used_by->create_enumerator(current->used_by);
- while (enumerator->enumerate(enumerator, (void**)&mapping))
- {
- if (priority == mapping->priority && type == mapping->type &&
- ipsec_sa_equals(mapping->sa, &assigned_sa))
- {
- current->used_by->remove_at(current->used_by, enumerator);
- policy_sa_destroy(mapping, &direction, this);
- break;
- }
- is_installed = FALSE;
- }
- enumerator->destroy(enumerator);
-
- if (current->used_by->get_count(current->used_by) > 0)
- { /* policy is used by more SAs, keep in kernel */
- DBG2(DBG_KNL, "policy still used by another CHILD_SA, not removed");
- if (!is_installed)
- { /* no need to update as the policy was not installed for this SA */
- this->mutex->unlock(this->mutex);
- return SUCCESS;
- }
-
- DBG2(DBG_KNL, "updating policy %R === %R %N (mark %u/0x%08x)",
- src_ts, dst_ts, policy_dir_names, direction,
- mark.value, mark.mask);
-
- current->used_by->get_first(current->used_by, (void**)&mapping);
- if (add_policy_internal(this, current, mapping, TRUE) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to update policy %R === %R %N",
- src_ts, dst_ts, policy_dir_names, direction);
- return FAILED;
- }
- return SUCCESS;
- }
-
- memset(&request, 0, sizeof(request));
-
- hdr = &request.hdr;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- hdr->nlmsg_type = XFRM_MSG_DELPOLICY;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userpolicy_id));
-
- policy_id = NLMSG_DATA(hdr);
- policy_id->sel = current->sel;
- policy_id->dir = direction;
-
- if (!add_mark(hdr, sizeof(request), mark))
- {
- this->mutex->unlock(this->mutex);
- return FAILED;
- }
-
- if (current->route)
- {
- route_entry_t *route = current->route;
- if (hydra->kernel_interface->del_route(hydra->kernel_interface,
- route->dst_net, route->prefixlen, route->gateway,
- route->src_ip, route->if_name) != SUCCESS)
- {
- DBG1(DBG_KNL, "error uninstalling route installed with "
- "policy %R === %R %N", src_ts, dst_ts,
- policy_dir_names, direction);
- }
- }
-
- this->policies->remove(this->policies, current);
- policy_entry_destroy(this, current);
- this->mutex->unlock(this->mutex);
-
- if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS)
- {
- if (mark.value)
- {
- DBG1(DBG_KNL, "unable to delete policy %R === %R %N "
- "(mark %u/0x%08x)", src_ts, dst_ts, policy_dir_names,
- direction, mark.value, mark.mask);
- }
- else
- {
- DBG1(DBG_KNL, "unable to delete policy %R === %R %N",
- src_ts, dst_ts, policy_dir_names, direction);
- }
- return FAILED;
- }
- return SUCCESS;
-}
-
-METHOD(kernel_ipsec_t, flush_policies, status_t,
- private_kernel_netlink_ipsec_t *this)
-{
- netlink_buf_t request;
- struct nlmsghdr *hdr;
-
- memset(&request, 0, sizeof(request));
-
- DBG2(DBG_KNL, "flushing all policies from SPD");
-
- hdr = &request.hdr;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- hdr->nlmsg_type = XFRM_MSG_FLUSHPOLICY;
- hdr->nlmsg_len = NLMSG_LENGTH(0); /* no data associated */
-
- /* by adding an rtattr of type XFRMA_POLICY_TYPE we could restrict this
- * to main or sub policies (default is main) */
-
- if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to flush SPD entries");
- return FAILED;
- }
- return SUCCESS;
-}
-
-/**
- * Bypass socket using a per-socket policy
- */
-static bool add_socket_bypass(private_kernel_netlink_ipsec_t *this,
- int fd, int family)
-{
- struct xfrm_userpolicy_info policy;
- u_int sol, ipsec_policy;
-
- switch (family)
- {
- case AF_INET:
- sol = SOL_IP;
- ipsec_policy = IP_XFRM_POLICY;
- break;
- case AF_INET6:
- sol = SOL_IPV6;
- ipsec_policy = IPV6_XFRM_POLICY;
- break;
- default:
- return FALSE;
- }
-
- memset(&policy, 0, sizeof(policy));
- policy.action = XFRM_POLICY_ALLOW;
- policy.sel.family = family;
-
- policy.dir = XFRM_POLICY_OUT;
- if (setsockopt(fd, sol, ipsec_policy, &policy, sizeof(policy)) < 0)
- {
- DBG1(DBG_KNL, "unable to set IPSEC_POLICY on socket: %s",
- strerror(errno));
- return FALSE;
- }
- policy.dir = XFRM_POLICY_IN;
- if (setsockopt(fd, sol, ipsec_policy, &policy, sizeof(policy)) < 0)
- {
- DBG1(DBG_KNL, "unable to set IPSEC_POLICY on socket: %s",
- strerror(errno));
- return FALSE;
- }
- return TRUE;
-}
-
-/**
- * Port based IKE bypass policy
- */
-typedef struct {
- /** address family */
- int family;
- /** layer 4 protocol */
- int proto;
- /** port number, network order */
- u_int16_t port;
-} bypass_t;
-
-/**
- * Add or remove a bypass policy from/to kernel
- */
-static bool manage_bypass(private_kernel_netlink_ipsec_t *this,
- int type, policy_dir_t dir, bypass_t *bypass)
-{
- netlink_buf_t request;
- struct xfrm_selector *sel;
- struct nlmsghdr *hdr;
-
- memset(&request, 0, sizeof(request));
- hdr = &request.hdr;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- hdr->nlmsg_type = type;
-
- if (type == XFRM_MSG_NEWPOLICY)
- {
- struct xfrm_userpolicy_info *policy;
-
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userpolicy_info));
-
- policy = NLMSG_DATA(hdr);
- policy->dir = dir;
- policy->priority = 32;
- policy->action = XFRM_POLICY_ALLOW;
- policy->share = XFRM_SHARE_ANY;
-
- policy->lft.soft_byte_limit = XFRM_INF;
- policy->lft.soft_packet_limit = XFRM_INF;
- policy->lft.hard_byte_limit = XFRM_INF;
- policy->lft.hard_packet_limit = XFRM_INF;
-
- sel = &policy->sel;
- }
- else /* XFRM_MSG_DELPOLICY */
- {
- struct xfrm_userpolicy_id *policy;
-
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userpolicy_id));
-
- policy = NLMSG_DATA(hdr);
- policy->dir = dir;
-
- sel = &policy->sel;
- }
-
- sel->family = bypass->family;
- sel->proto = bypass->proto;
- if (dir == POLICY_IN)
- {
- sel->dport = bypass->port;
- sel->dport_mask = 0xffff;
- }
- else
- {
- sel->sport = bypass->port;
- sel->sport_mask = 0xffff;
- }
- return this->socket_xfrm->send_ack(this->socket_xfrm, hdr) == SUCCESS;
-}
-
-/**
- * Bypass socket using a port-based bypass policy
- */
-static bool add_port_bypass(private_kernel_netlink_ipsec_t *this,
- int fd, int family)
-{
- union {
- struct sockaddr sa;
- struct sockaddr_in in;
- struct sockaddr_in6 in6;
- } saddr;
- socklen_t len;
- bypass_t bypass = {
- .family = family,
- };
-
- len = sizeof(saddr);
- if (getsockname(fd, &saddr.sa, &len) != 0)
- {
- return FALSE;
- }
-#ifdef SO_PROTOCOL /* since 2.6.32 */
- len = sizeof(bypass.proto);
- if (getsockopt(fd, SOL_SOCKET, SO_PROTOCOL, &bypass.proto, &len) != 0)
-#endif
- { /* assume UDP if SO_PROTOCOL not supported */
- bypass.proto = IPPROTO_UDP;
- }
- switch (family)
- {
- case AF_INET:
- bypass.port = saddr.in.sin_port;
- break;
- case AF_INET6:
- bypass.port = saddr.in6.sin6_port;
- break;
- default:
- return FALSE;
- }
-
- if (!manage_bypass(this, XFRM_MSG_NEWPOLICY, POLICY_IN, &bypass))
- {
- return FALSE;
- }
- if (!manage_bypass(this, XFRM_MSG_NEWPOLICY, POLICY_OUT, &bypass))
- {
- manage_bypass(this, XFRM_MSG_DELPOLICY, POLICY_IN, &bypass);
- return FALSE;
- }
- array_insert(this->bypass, ARRAY_TAIL, &bypass);
-
- return TRUE;
-}
-
-/**
- * Remove installed port based bypass policy
- */
-static void remove_port_bypass(bypass_t *bypass, int idx,
- private_kernel_netlink_ipsec_t *this)
-{
- manage_bypass(this, XFRM_MSG_DELPOLICY, POLICY_OUT, bypass);
- manage_bypass(this, XFRM_MSG_DELPOLICY, POLICY_IN, bypass);
-}
-
-METHOD(kernel_ipsec_t, bypass_socket, bool,
- private_kernel_netlink_ipsec_t *this, int fd, int family)
-{
- if (lib->settings->get_bool(lib->settings,
- "%s.plugins.kernel-netlink.port_bypass", FALSE, lib->ns))
- {
- return add_port_bypass(this, fd, family);
- }
- return add_socket_bypass(this, fd, family);
-}
-
-METHOD(kernel_ipsec_t, enable_udp_decap, bool,
- private_kernel_netlink_ipsec_t *this, int fd, int family, u_int16_t port)
-{
- int type = UDP_ENCAP_ESPINUDP;
-
- if (setsockopt(fd, SOL_UDP, UDP_ENCAP, &type, sizeof(type)) < 0)
- {
- DBG1(DBG_KNL, "unable to set UDP_ENCAP: %s", strerror(errno));
- return FALSE;
- }
- return TRUE;
-}
-
-METHOD(kernel_ipsec_t, destroy, void,
- private_kernel_netlink_ipsec_t *this)
-{
- enumerator_t *enumerator;
- policy_entry_t *policy;
-
- array_destroy_function(this->bypass,
- (array_callback_t)remove_port_bypass, this);
- if (this->socket_xfrm_events > 0)
- {
- lib->watcher->remove(lib->watcher, this->socket_xfrm_events);
- close(this->socket_xfrm_events);
- }
- DESTROY_IF(this->socket_xfrm);
- enumerator = this->policies->create_enumerator(this->policies);
- while (enumerator->enumerate(enumerator, &policy, &policy))
- {
- policy_entry_destroy(this, policy);
- }
- enumerator->destroy(enumerator);
- this->policies->destroy(this->policies);
- this->sas->destroy(this->sas);
- this->mutex->destroy(this->mutex);
- free(this);
-}
-
-/*
- * Described in header.
- */
-kernel_netlink_ipsec_t *kernel_netlink_ipsec_create()
-{
- private_kernel_netlink_ipsec_t *this;
- bool register_for_events = TRUE;
- FILE *f;
-
- INIT(this,
- .public = {
- .interface = {
- .get_features = _get_features,
- .get_spi = _get_spi,
- .get_cpi = _get_cpi,
- .add_sa = _add_sa,
- .update_sa = _update_sa,
- .query_sa = _query_sa,
- .del_sa = _del_sa,
- .flush_sas = _flush_sas,
- .add_policy = _add_policy,
- .query_policy = _query_policy,
- .del_policy = _del_policy,
- .flush_policies = _flush_policies,
- .bypass_socket = _bypass_socket,
- .enable_udp_decap = _enable_udp_decap,
- .destroy = _destroy,
- },
- },
- .policies = hashtable_create((hashtable_hash_t)policy_hash,
- (hashtable_equals_t)policy_equals, 32),
- .sas = hashtable_create((hashtable_hash_t)ipsec_sa_hash,
- (hashtable_equals_t)ipsec_sa_equals, 32),
- .bypass = array_create(sizeof(bypass_t), 0),
- .mutex = mutex_create(MUTEX_TYPE_DEFAULT),
- .policy_update = lib->settings->get_bool(lib->settings,
- "%s.plugins.kernel-netlink.policy_update", FALSE, lib->ns),
- .install_routes = lib->settings->get_bool(lib->settings,
- "%s.install_routes", TRUE, lib->ns),
- .proto_port_transport = lib->settings->get_bool(lib->settings,
- "%s.plugins.kernel-netlink.set_proto_port_transport_sa",
- FALSE, lib->ns),
- );
-
- if (streq(lib->ns, "starter"))
- { /* starter has no threads, so we do not register for kernel events */
- register_for_events = FALSE;
- }
-
- f = fopen("/proc/sys/net/core/xfrm_acq_expires", "w");
- if (f)
- {
- fprintf(f, "%u", lib->settings->get_int(lib->settings,
- "%s.plugins.kernel-netlink.xfrm_acq_expires",
- DEFAULT_ACQUIRE_LIFETIME, lib->ns));
- fclose(f);
- }
-
- this->socket_xfrm = netlink_socket_create(NETLINK_XFRM, xfrm_msg_names,
- lib->settings->get_bool(lib->settings,
- "%s.plugins.kernel-netlink.parallel_xfrm", FALSE, lib->ns));
- if (!this->socket_xfrm)
- {
- destroy(this);
- return NULL;
- }
-
- if (register_for_events)
- {
- struct sockaddr_nl addr;
-
- memset(&addr, 0, sizeof(addr));
- addr.nl_family = AF_NETLINK;
-
- /* create and bind XFRM socket for ACQUIRE, EXPIRE, MIGRATE & MAPPING */
- this->socket_xfrm_events = socket(AF_NETLINK, SOCK_RAW, NETLINK_XFRM);
- if (this->socket_xfrm_events <= 0)
- {
- DBG1(DBG_KNL, "unable to create XFRM event socket");
- destroy(this);
- return NULL;
- }
- addr.nl_groups = XFRMNLGRP(ACQUIRE) | XFRMNLGRP(EXPIRE) |
- XFRMNLGRP(MIGRATE) | XFRMNLGRP(MAPPING);
- if (bind(this->socket_xfrm_events, (struct sockaddr*)&addr, sizeof(addr)))
- {
- DBG1(DBG_KNL, "unable to bind XFRM event socket");
- destroy(this);
- return NULL;
- }
- lib->watcher->add(lib->watcher, this->socket_xfrm_events, WATCHER_READ,
- (watcher_cb_t)receive_events, this);
- }
-
- return &this->public;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-24 23:55:01 +0000