/*
- * Copyright (C) 2006-2009 Tobias Brunner
+ * Copyright (C) 2006-2016 Tobias Brunner
* Copyright (C) 2005-2009 Martin Willi
- * Copyright (C) 2008 Andreas Steffen
+ * Copyright (C) 2008-2016 Andreas Steffen
* Copyright (C) 2006-2007 Fabian Hartmann, Noah Heusser
* Copyright (C) 2006 Daniel Roethlisberger
* Copyright (C) 2005 Jan Hutter
- * Hochschule fuer Technik Rapperswil
+ * HSR 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
* for more details.
*/
+#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/socket.h>
#include <stdint.h>
#include <linux/rtnetlink.h>
#include <linux/xfrm.h>
#include <linux/udp.h>
+#include <net/if.h>
#include <unistd.h>
#include <time.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
+#include <dlfcn.h>
#include "kernel_netlink_ipsec.h"
#include "kernel_netlink_shared.h"
-#include <hydra.h>
#include <daemon.h>
-#include <threading/thread.h>
+#include <utils/debug.h>
#include <threading/mutex.h>
-#include <utils/hashtable.h>
-#include <processing/jobs/callback_job.h>
-#include <processing/jobs/migrate_job.h>
-#include <processing/jobs/update_sa_job.h>
+#include <threading/condvar.h>
+#include <collections/array.h>
+#include <collections/hashtable.h>
+#include <collections/linked_list.h>
-/** required for Linux 2.6.26 kernel and later */
+/** Required for Linux 2.6.26 kernel and later */
#ifndef XFRM_STATE_AF_UNSPEC
-#define XFRM_STATE_AF_UNSPEC 32
+#define XFRM_STATE_AF_UNSPEC 32
#endif
-/** from linux/in.h */
+/** From linux/in.h */
#ifndef IP_XFRM_POLICY
#define IP_XFRM_POLICY 17
#endif
-/* missing on uclibc */
+/** 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
+/* 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 100000
+
+/** Default lifetime of an acquire XFRM state (in seconds) */
+#define DEFAULT_ACQUIRE_LIFETIME 165
/**
- * map the limit for bytes and packets to XFRM_INF per default
+ * Map the limit for bytes and packets to XFRM_INF by default
*/
#define XFRM_LIMIT(x) ((x) == 0 ? XFRM_INF : (x))
#define XFRMNLGRP(x) (1<<(XFRMNLGRP_##x-1))
/**
- * returns a pointer to the first rtattr following the nlmsghdr *nlh and the
+ * 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)))
+#define XFRM_RTA(nlh, x) ((struct rtattr*)(NLMSG_DATA(nlh) + \
+ NLMSG_ALIGN(sizeof(x))))
/**
- * returns the total size of attached rta data
+ * 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))
"XFRM_MSG_MAPPING"
);
-ENUM(xfrm_attr_type_names, XFRMA_UNSPEC, XFRMA_KMADDRESS,
+ENUM(xfrm_attr_type_names, XFRMA_UNSPEC, XFRMA_REPLAY_ESN_VAL,
"XFRMA_UNSPEC",
"XFRMA_ALG_AUTH",
"XFRMA_ALG_CRYPT",
"XFRMA_POLICY_TYPE",
"XFRMA_MIGRATE",
"XFRMA_ALG_AEAD",
- "XFRMA_KMADDRESS"
+ "XFRMA_KMADDRESS",
+ "XFRMA_ALG_AUTH_TRUNC",
+ "XFRMA_MARK",
+ "XFRMA_TFCPAD",
+ "XFRMA_REPLAY_ESN_VAL",
);
-#define END_OF_LIST -1
-
/**
* Algorithms for encryption
*/
{ENCR_3DES, "des3_ede" },
/* {ENCR_RC5, "***" }, */
/* {ENCR_IDEA, "***" }, */
- {ENCR_CAST, "cast128" },
+ {ENCR_CAST, "cast5" },
{ENCR_BLOWFISH, "blowfish" },
/* {ENCR_3IDEA, "***" }, */
/* {ENCR_DES_IV32, "***" }, */
/* {ENCR_CAMELLIA_CCM_ICV8, "***" }, */
/* {ENCR_CAMELLIA_CCM_ICV12, "***" }, */
/* {ENCR_CAMELLIA_CCM_ICV16, "***" }, */
- {END_OF_LIST, NULL }
+ {ENCR_SERPENT_CBC, "serpent" },
+ {ENCR_TWOFISH_CBC, "twofish" },
+ {ENCR_CHACHA20_POLY1305, "rfc7539esp(chacha20,poly1305)"},
};
/**
*/
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_DES_MAC, "***" }, */
/* {AUTH_KPDK_MD5, "***" }, */
{AUTH_AES_XCBC_96, "xcbc(aes)" },
- {END_OF_LIST, NULL }
};
/**
{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)
+static char* lookup_algorithm(transform_type_t type, int ikev2)
{
- while (list->ikev2 != END_OF_LIST)
+ 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->ikev2 == ikev2)
+ if (list[i].ikev2 == ikev2)
{
- return list->name;
+ return list[i].name;
}
- list++;
+ }
+ if (charon->kernel->lookup_algorithm(charon->kernel, 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;
+
+ /**
+ * Condvar to synchronize access to individual policies
+ */
+ condvar_t *condvar;
+
+ /**
+ * 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;
+
+ /**
+ * Custom priority calculation function
+ */
+ uint32_t (*get_priority)(kernel_ipsec_policy_id_t *id,
+ kernel_ipsec_manage_policy_t *data);
+};
+
typedef struct route_entry_t route_entry_t;
/**
- * installed routing entry
+ * Installed routing entry
*/
struct route_entry_t {
/** Name of the interface the route is bound to */
/** Source ip of the route */
host_t *src_ip;
- /** gateway for this route */
+ /** Gateway for this route */
host_t *gateway;
/** Destination net */
chunk_t dst_net;
/** Destination net prefixlen */
- u_int8_t prefixlen;
+ uint8_t prefixlen;
};
/**
- * destroy an route_entry_t object
+ * Destroy a route_entry_t object
*/
static void route_entry_destroy(route_entry_t *this)
{
free(this);
}
-typedef struct policy_entry_t policy_entry_t;
+/**
+ * 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;
/**
- * installed kernel policy.
+ * IPsec SA assigned to a policy.
*/
-struct policy_entry_t {
+struct ipsec_sa_t {
+ /** Source address of this SA */
+ host_t *src;
- /** direction of this policy: in, out, forward */
- u_int8_t direction;
+ /** Destination address of this SA */
+ host_t *dst;
- /** parameters of installed policy */
- struct xfrm_selector sel;
+ /** Optional mark */
+ mark_t mark;
- /** optional mark */
- u_int32_t mark;
+ /** Description of this SA */
+ ipsec_sa_cfg_t cfg;
- /** associated route installed for this policy */
- route_entry_t *route;
+ /** 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) &&
+ sa->mark.value == other_sa->mark.value &&
+ sa->mark.mask == other_sa->mark.mask &&
+ ipsec_sa_cfg_equals(&sa->cfg, &other_sa->cfg);
+}
+
+/**
+ * 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_out_t policy_sa_out_t;
+
+/**
+ * Mapping between a policy and an IPsec SA.
+ */
+struct policy_sa_t {
+ /** Priority assigned to the policy when installed with this SA */
+ uint32_t priority;
+
+ /** Automatic priority assigned to the policy when installed with this SA */
+ uint32_t auto_priority;
+
+ /** Type of the policy */
+ policy_type_t type;
- /** by how many CHILD_SA's this policy is used */
- u_int refcount;
+ /** Assigned SA */
+ ipsec_sa_t *sa;
};
/**
- * Hash function for policy_entry_t objects
+ * For outbound policies we also cache the traffic selectors in order to install
+ * the route.
*/
-static u_int policy_hash(policy_entry_t *key)
+struct policy_sa_out_t {
+ /** Generic interface */
+ policy_sa_t generic;
+
+ /** Source traffic selector of this policy */
+ traffic_selector_t *src_ts;
+
+ /** Destination traffic selector of this policy */
+ traffic_selector_t *dst_ts;
+};
+
+/**
+ * Create a policy_sa(_in)_t object
+ */
+static policy_sa_t *policy_sa_create(private_kernel_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)
{
- chunk_t chunk = chunk_create((void*)&key->sel,
- sizeof(struct xfrm_selector) + sizeof(u_int32_t));
- return chunk_hash(chunk);
+ policy_sa_t *policy;
+
+ if (dir == POLICY_OUT)
+ {
+ policy_sa_out_t *out;
+ INIT(out,
+ .src_ts = src_ts->clone(src_ts),
+ .dst_ts = dst_ts->clone(dst_ts),
+ );
+ policy = &out->generic;
+ }
+ else
+ {
+ INIT(policy, .priority = 0);
+ }
+ policy->type = type;
+ policy->sa = ipsec_sa_create(this, src, dst, mark, cfg);
+ return policy;
}
/**
- * Equality function for policy_entry_t objects
+ * Destroy a policy_sa(_in)_t object
*/
-static bool policy_equals(policy_entry_t *key, policy_entry_t *other_key)
+static void policy_sa_destroy(policy_sa_t *policy, policy_dir_t *dir,
+ private_kernel_netlink_ipsec_t *this)
{
- return memeq(&key->sel, &other_key->sel,
- sizeof(struct xfrm_selector) + sizeof(u_int32_t)) &&
- key->direction == other_key->direction;
+ if (*dir == POLICY_OUT)
+ {
+ policy_sa_out_t *out = (policy_sa_out_t*)policy;
+ out->src_ts->destroy(out->src_ts);
+ out->dst_ts->destroy(out->dst_ts);
+ }
+ ipsec_sa_destroy(this, policy->sa);
+ free(policy);
}
-typedef struct private_kernel_netlink_ipsec_t private_kernel_netlink_ipsec_t;
+typedef struct policy_entry_t policy_entry_t;
/**
- * Private variables and functions of kernel_netlink class.
+ * Installed kernel policy.
*/
-struct private_kernel_netlink_ipsec_t {
- /**
- * Public part of the kernel_netlink_t object.
- */
- kernel_netlink_ipsec_t public;
+struct policy_entry_t {
- /**
- * mutex to lock access to various lists
- */
- mutex_t *mutex;
+ /** Direction of this policy: in, out, forward */
+ uint8_t direction;
- /**
- * Hash table of installed policies (policy_entry_t)
- */
- hashtable_t *policies;
+ /** Parameters of installed policy */
+ struct xfrm_selector sel;
- /**
- * job receiving netlink events
- */
- callback_job_t *job;
+ /** Optional mark */
+ uint32_t mark;
- /**
- * Netlink xfrm socket (IPsec)
- */
- netlink_socket_t *socket_xfrm;
+ /** Associated route installed for this policy */
+ route_entry_t *route;
- /**
- * netlink xfrm socket to receive acquire and expire events
- */
- int socket_xfrm_events;
+ /** List of SAs this policy is used by, ordered by priority */
+ linked_list_t *used_by;
- /**
- * whether to install routes along policies
- */
- bool install_routes;
+ /** reqid for this policy */
+ uint32_t reqid;
+
+ /** Number of threads waiting to work on this policy */
+ int waiting;
+
+ /** TRUE if a thread is working on this policy */
+ bool working;
};
/**
- * convert a IKEv2 specific protocol identifier to the kernel one
+ * Destroy a policy_entry_t object
*/
-static u_int8_t proto_ike2kernel(protocol_id_t proto)
+static void policy_entry_destroy(private_kernel_netlink_ipsec_t *this,
+ policy_entry_t *policy)
{
- switch (proto)
+ if (policy->route)
{
- case PROTO_ESP:
- return IPPROTO_ESP;
- case PROTO_AH:
- return IPPROTO_AH;
- default:
- return proto;
+ 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);
}
/**
- * reverse of ike2kernel
+ * Hash function for policy_entry_t objects
*/
-static protocol_id_t proto_kernel2ike(u_int8_t proto)
+static u_int policy_hash(policy_entry_t *key)
{
- switch (proto)
+ 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;
+}
+
+/**
+ * Determine number of set bits in 16 bit port mask
+ */
+static inline uint32_t port_mask_bits(uint16_t port_mask)
+{
+ uint32_t bits;
+ uint16_t bit_mask = 0x8000;
+
+ port_mask = ntohs(port_mask);
+
+ for (bits = 0; bits < 16; bits++)
{
- case IPPROTO_ESP:
- return PROTO_ESP;
- case IPPROTO_AH:
- return PROTO_AH;
- default:
- return proto;
+ if (!(port_mask & bit_mask))
+ {
+ break;
+ }
+ bit_mask >>= 1;
+ }
+ return bits;
+}
+
+/**
+ * Calculate the priority of a policy
+ *
+ * bits 0-0: restriction to network interface (0..1) 1 bit
+ * bits 1-6: src + dst port mask bits (2 * 0..16) 6 bits
+ * bits 7-7: restriction to protocol (0..1) 1 bit
+ * bits 8-16: src + dst network mask bits (2 * 0..128) 9 bits
+ * 17 bits
+ *
+ * smallest value: 000000000 0 000000 0: 0, lowest priority = 100'000
+ * largest value : 100000000 1 100000 1: 65'729, highst priority = 34'271
+ */
+static uint32_t get_priority(policy_entry_t *policy, policy_priority_t prio,
+ char *interface)
+{
+ uint32_t priority = PRIO_BASE, sport_mask_bits, dport_mask_bits;
+
+ switch (prio)
+ {
+ case POLICY_PRIORITY_FALLBACK:
+ priority += PRIO_BASE;
+ /* fall-through to next case */
+ case POLICY_PRIORITY_ROUTED:
+ priority += PRIO_BASE;
+ /* fall-through to next case */
+ case POLICY_PRIORITY_DEFAULT:
+ priority += PRIO_BASE;
+ /* fall-through to next case */
+ case POLICY_PRIORITY_PASS:
+ break;
}
+ sport_mask_bits = port_mask_bits(policy->sel.sport_mask);
+ dport_mask_bits = port_mask_bits(policy->sel.dport_mask);
+
+ /* calculate priority */
+ priority -= (policy->sel.prefixlen_s + policy->sel.prefixlen_d) * 256;
+ priority -= policy->sel.proto ? 128 : 0;
+ priority -= (sport_mask_bits + dport_mask_bits) * 2;
+ priority -= (interface != NULL);
+
+ return priority;
}
/**
- * convert the general ipsec mode to the one defined in xfrm.h
+ * Convert the general ipsec mode to the one defined in xfrm.h
*/
-static u_int8_t mode2kernel(ipsec_mode_t mode)
+static uint8_t mode2kernel(ipsec_mode_t mode)
{
switch (mode)
{
}
/**
- * convert a host_t to a struct xfrm_address
+ * Convert a host_t to a struct xfrm_address
*/
static void host2xfrm(host_t *host, xfrm_address_t *xfrm)
{
}
/**
- * convert a struct xfrm_address to a host_t
+ * Convert a struct xfrm_address to a host_t
*/
-static host_t* xfrm2host(int family, xfrm_address_t *xfrm, u_int16_t port)
+static host_t* xfrm2host(int family, xfrm_address_t *xfrm, uint16_t port)
{
chunk_t chunk;
}
/**
- * convert a traffic selector address range to subnet and its mask.
+ * 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)
+ xfrm_address_t *net, uint8_t *mask)
{
host_t *net_host;
chunk_t net_chunk;
}
/**
- * convert a traffic selector port range to port/portmask
+ * Convert a traffic selector port range to port/portmask
*/
static void ts2ports(traffic_selector_t* ts,
- u_int16_t *port, u_int16_t *mask)
+ uint16_t *port, uint16_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;
+ uint16_t from, to, bitmask;
+ int bit;
from = ts->get_from_port(ts);
to = ts->get_to_port(ts);
+ /* Quick check for a single port */
if (from == to)
{
*port = htons(from);
}
else
{
- *port = 0;
+ /* Compute the port mask for port ranges */
*mask = 0;
+
+ for (bit = 15; bit >= 0; bit--)
+ {
+ bitmask = 1 << bit;
+
+ if ((bitmask & from) != (bitmask & to))
+ {
+ *port = htons(from & *mask);
+ *mask = htons(*mask);
+ return;
+ }
+ *mask |= bitmask;
+ }
}
+ return;
}
/**
- * convert a pair of traffic_selectors to a xfrm_selector
+ * Convert a pair of traffic_selectors to an xfrm_selector
*/
static struct xfrm_selector ts2selector(traffic_selector_t *src,
- traffic_selector_t *dst)
+ traffic_selector_t *dst,
+ char *interface)
{
struct xfrm_selector sel;
+ uint16_t port;
memset(&sel, 0, sizeof(sel));
sel.family = (src->get_type(src) == TS_IPV4_ADDR_RANGE) ? AF_INET : AF_INET6;
ts2subnet(src, &sel.saddr, &sel.prefixlen_s);
ts2ports(dst, &sel.dport, &sel.dport_mask);
ts2ports(src, &sel.sport, &sel.sport_mask);
- sel.ifindex = 0;
+ 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 = interface ? if_nametoindex(interface) : 0;
sel.user = 0;
return sel;
}
/**
- * convert a xfrm_selector to a src|dst traffic_selector
+ * 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;
+ uint8_t prefixlen;
+ uint16_t port = 0;
host_t *host = NULL;
if (src)
prefixlen = sel->prefixlen_s;
if (sel->sport_mask)
{
- port = htons(sel->sport);
+ port = ntohs(sel->sport);
}
}
else
prefixlen = sel->prefixlen_d;
if (sel->dport_mask)
{
- port = htons(sel->dport);
+ 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 (host)
{
return traffic_selector_create_from_subnet(host, prefixlen,
- sel->proto, port);
+ sel->proto, port, port ?: 65535);
}
return NULL;
}
/**
- * process a XFRM_MSG_ACQUIRE from kernel
+ * Process a XFRM_MSG_ACQUIRE from kernel
*/
-static void process_acquire(private_kernel_netlink_ipsec_t *this, struct nlmsghdr *hdr)
+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;
+ traffic_selector_t *src_ts, *dst_ts;
+ uint32_t reqid = 0;
+ int proto = 0;
- acquire = (struct xfrm_user_acquire*)NLMSG_DATA(hdr);
+ acquire = NLMSG_DATA(hdr);
rta = XFRM_RTA(hdr, struct xfrm_user_acquire);
rtasize = XFRM_PAYLOAD(hdr, struct xfrm_user_acquire);
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;
src_ts = selector2ts(&acquire->sel, TRUE);
dst_ts = selector2ts(&acquire->sel, FALSE);
- charon->kernel_interface->acquire(charon->kernel_interface, reqid, src_ts,
- dst_ts);
+ charon->kernel->acquire(charon->kernel, reqid, src_ts, dst_ts);
}
/**
- * process a XFRM_MSG_EXPIRE from kernel
+ * Process a XFRM_MSG_EXPIRE from kernel
*/
-static void process_expire(private_kernel_netlink_ipsec_t *this, struct nlmsghdr *hdr)
+static void process_expire(private_kernel_netlink_ipsec_t *this,
+ struct nlmsghdr *hdr)
{
- protocol_id_t protocol;
- u_int32_t spi, reqid;
struct xfrm_user_expire *expire;
+ uint32_t spi;
+ uint8_t protocol;
+ host_t *dst;
- expire = (struct xfrm_user_expire*)NLMSG_DATA(hdr);
- protocol = proto_kernel2ike(expire->state.id.proto);
+ expire = NLMSG_DATA(hdr);
+ protocol = 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)
+ if (protocol == IPPROTO_ESP || protocol == IPPROTO_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;
+ dst = xfrm2host(expire->state.family, &expire->state.id.daddr, 0);
+ if (dst)
+ {
+ charon->kernel->expire(charon->kernel, protocol, spi, dst,
+ expire->hard != 0);
+ dst->destroy(dst);
+ }
}
-
- charon->kernel_interface->expire(charon->kernel_interface, reqid, protocol,
- spi, expire->hard != 0);
}
/**
- * process a XFRM_MSG_MIGRATE from kernel
+ * Process a XFRM_MSG_MIGRATE from kernel
*/
-static void process_migrate(private_kernel_netlink_ipsec_t *this, struct nlmsghdr *hdr)
+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;
- struct xfrm_userpolicy_id *policy_id;
- struct rtattr *rta;
- size_t rtasize;
- u_int32_t reqid = 0;
+ uint32_t reqid = 0;
policy_dir_t dir;
- job_t *job;
- policy_id = (struct xfrm_userpolicy_id*)NLMSG_DATA(hdr);
+ policy_id = NLMSG_DATA(hdr);
rta = XFRM_RTA(hdr, struct xfrm_userpolicy_id);
rtasize = XFRM_PAYLOAD(hdr, struct xfrm_userpolicy_id);
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);
+ 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);
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);
- hydra->processor->queue_job(hydra->processor, job);
+ charon->kernel->migrate(charon->kernel, reqid, src_ts, dst_ts, dir,
+ local, remote);
}
else
{
}
/**
- * process a XFRM_MSG_MAPPING from kernel
+ * 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;
+ uint32_t spi;
- mapping = (struct xfrm_user_mapping*)NLMSG_DATA(hdr);
+ 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)
+ if (mapping->id.proto == IPPROTO_ESP)
{
- host = xfrm2host(mapping->id.family, &mapping->new_saddr,
- mapping->new_sport);
- if (host)
+ host_t *dst, *new;
+
+ dst = xfrm2host(mapping->id.family, &mapping->id.daddr, 0);
+ if (dst)
{
- 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);
- hydra->processor->queue_job(hydra->processor, job);
+ new = xfrm2host(mapping->id.family, &mapping->new_saddr,
+ mapping->new_sport);
+ if (new)
+ {
+ charon->kernel->mapping(charon->kernel, IPPROTO_ESP, spi, dst,
+ new);
+ new->destroy(new);
+ }
+ dst->destroy(dst);
}
}
}
/**
* Receives events from kernel
*/
-static job_requeue_t receive_events(private_kernel_netlink_ipsec_t *this)
+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;
- bool oldstate;
-
- oldstate = thread_cancelability(TRUE);
- len = recvfrom(this->socket_xfrm_events, response, sizeof(response), 0,
- (struct sockaddr*)&addr, &addr_len);
- thread_cancelability(oldstate);
+ 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 JOB_REQUEUE_DIRECT;
+ return TRUE;
case EAGAIN:
/* no data ready, select again */
- return JOB_REQUEUE_DIRECT;
+ return TRUE;
default:
- DBG1(DBG_KNL, "unable to receive from xfrm event socket");
+ DBG1(DBG_KNL, "unable to receive from XFRM event socket: %s "
+ "(%d)", strerror(errno), errno);
sleep(1);
- return JOB_REQUEUE_FAIR;
+ return TRUE;
}
}
if (addr.nl_pid != 0)
{ /* not from kernel. not interested, try another one */
- return JOB_REQUEUE_DIRECT;
+ return TRUE;
}
while (NLMSG_OK(hdr, len))
process_mapping(this, hdr);
break;
default:
- DBG1(DBG_KNL, "received unknown event from xfrm event socket: %d", hdr->nlmsg_type);
+ DBG1(DBG_KNL, "received unknown event from XFRM event "
+ "socket: %d", hdr->nlmsg_type);
break;
}
hdr = NLMSG_NEXT(hdr, len);
}
- return JOB_REQUEUE_DIRECT;
+ 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 reqid, u_int32_t *spi)
+ host_t *src, host_t *dst, uint8_t proto, uint32_t min, uint32_t max,
+ uint32_t *spi)
{
netlink_buf_t request;
struct nlmsghdr *hdr, *out;
struct xfrm_userspi_info *userspi;
- u_int32_t received_spi = 0;
+ uint32_t received_spi = 0;
size_t len;
memset(&request, 0, sizeof(request));
- hdr = (struct nlmsghdr*)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 = (struct xfrm_userspi_info*)NLMSG_DATA(hdr);
+ 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.reqid = reqid;
userspi->info.family = src->get_family(src);
userspi->min = min;
userspi->max = max;
case NLMSG_ERROR:
{
struct nlmsgerr *err = NLMSG_DATA(hdr);
-
DBG1(DBG_KNL, "allocating SPI failed: %s (%d)",
strerror(-err->error), -err->error);
break;
METHOD(kernel_ipsec_t, get_spi, status_t,
private_kernel_netlink_ipsec_t *this, host_t *src, host_t *dst,
- protocol_id_t protocol, u_int32_t reqid, u_int32_t *spi)
+ uint8_t protocol, uint32_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)
+ if (get_spi_internal(this, src, dst, protocol,
+ 0xc0000000, 0xcFFFFFFF, spi) != SUCCESS)
{
- DBG1(DBG_KNL, "unable to get SPI for reqid {%u}", reqid);
+ DBG1(DBG_KNL, "unable to get SPI");
return FAILED;
}
- DBG2(DBG_KNL, "got SPI %.8x for reqid {%u}", ntohl(*spi), reqid);
-
+ 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_int32_t reqid, u_int16_t *cpi)
+ uint16_t *cpi)
{
- u_int32_t received_spi = 0;
-
- DBG2(DBG_KNL, "getting CPI for reqid {%u}", reqid);
+ uint32_t received_spi = 0;
- if (get_spi_internal(this, src, dst,
- IPPROTO_COMP, 0x100, 0xEFFF, reqid, &received_spi) != SUCCESS)
+ if (get_spi_internal(this, src, dst, IPPROTO_COMP,
+ 0x100, 0xEFFF, &received_spi) != SUCCESS)
{
- DBG1(DBG_KNL, "unable to get CPI for reqid {%u}", reqid);
+ DBG1(DBG_KNL, "unable to get CPI");
return FAILED;
}
- *cpi = htons((u_int16_t)ntohl(received_spi));
-
- DBG2(DBG_KNL, "got CPI %.4x for reqid {%u}", ntohs(*cpi), reqid);
+ *cpi = htons((uint16_t)ntohl(received_spi));
+ DBG2(DBG_KNL, "got CPI %.4x", ntohs(*cpi));
return SUCCESS;
}
-METHOD(kernel_ipsec_t, add_sa, status_t,
- private_kernel_netlink_ipsec_t *this, host_t *src, host_t *dst,
- u_int32_t spi, protocol_id_t protocol, u_int32_t reqid, mark_t mark,
- 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)
+/**
+ * Format the mark for debug messages
+ */
+static void format_mark(char *buf, int buflen, mark_t mark)
{
- 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)
+ if (mark.value)
+ {
+ snprintf(buf, buflen, " (mark %u/0x%08x)", mark.value, mark.mask);
+ }
+}
+
+/**
+ * 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, kernel_ipsec_sa_id_t *id,
+ kernel_ipsec_add_sa_t *data)
+{
+ netlink_buf_t request;
+ char *alg_name, markstr[32] = "";
+ struct nlmsghdr *hdr;
+ struct xfrm_usersa_info *sa;
+ uint16_t icv_size = 64, ipcomp = data->ipcomp;
+ ipsec_mode_t mode = data->mode, original_mode = data->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 && data->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,
- &lft, ENCR_UNDEFINED, chunk_empty, AUTH_UNDEFINED, chunk_empty,
- mode, ipcomp, 0, FALSE, inbound, NULL, NULL);
+ kernel_ipsec_sa_id_t ipcomp_id = {
+ .src = id->src,
+ .dst = id->dst,
+ .spi = htonl(ntohs(data->cpi)),
+ .proto = IPPROTO_COMP,
+ .mark = id->mark,
+ };
+ kernel_ipsec_add_sa_t ipcomp_sa = {
+ .reqid = data->reqid,
+ .mode = data->mode,
+ .src_ts = data->src_ts,
+ .dst_ts = data->dst_ts,
+ .lifetime = &lft,
+ .enc_alg = ENCR_UNDEFINED,
+ .int_alg = AUTH_UNDEFINED,
+ .tfc = data->tfc,
+ .ipcomp = data->ipcomp,
+ .initiator = data->initiator,
+ .inbound = data->inbound,
+ .update = data->update,
+ };
+ add_sa(this, &ipcomp_id, &ipcomp_sa);
ipcomp = IPCOMP_NONE;
/* use transport mode ESP SA, IPComp uses tunnel mode */
mode = MODE_TRANSPORT;
}
memset(&request, 0, sizeof(request));
+ format_mark(markstr, sizeof(markstr), id->mark);
- if (mark.value)
- {
- DBG2(DBG_KNL, "adding SAD entry with SPI %.8x and reqid {%u} "
- "(mark %u/0x%8x)", ntohl(spi), reqid, mark.value, mark.mask);
- }
- else
- {
- DBG2(DBG_KNL, "adding SAD entry with SPI %.8x and reqid {%u}",
- ntohl(spi), reqid);
- }
- hdr = (struct nlmsghdr*)request;
+ DBG2(DBG_KNL, "adding SAD entry with SPI %.8x and reqid {%u}%s",
+ ntohl(id->spi), data->reqid, markstr);
+
+ hdr = &request.hdr;
hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- hdr->nlmsg_type = inbound ? XFRM_MSG_UPDSA : XFRM_MSG_NEWSA;
+ hdr->nlmsg_type = data->update ? 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 = NLMSG_DATA(hdr);
+ host2xfrm(id->src, &sa->saddr);
+ host2xfrm(id->dst, &sa->id.daddr);
+ sa->id.spi = id->spi;
+ sa->id.proto = id->proto;
+ sa->family = id->src->get_family(id->src);
sa->mode = mode2kernel(mode);
switch (mode)
{
sa->flags |= XFRM_STATE_AF_UNSPEC;
break;
case MODE_BEET:
- if(src_ts && dst_ts)
+ 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 (data->src_ts->get_first(data->src_ts,
+ (void**)&first_src_ts) == SUCCESS &&
+ data->dst_ts->get_first(data->dst_ts,
+ (void**)&first_dst_ts) == SUCCESS)
{
- sa->sel = ts2selector(src_ts, dst_ts);
+ sa->sel = ts2selector(first_src_ts, first_dst_ts,
+ data->interface);
+ 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->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);
+ sa->reqid = data->reqid;
+ sa->lft.soft_byte_limit = XFRM_LIMIT(data->lifetime->bytes.rekey);
+ sa->lft.hard_byte_limit = XFRM_LIMIT(data->lifetime->bytes.life);
+ sa->lft.soft_packet_limit = XFRM_LIMIT(data->lifetime->packets.rekey);
+ sa->lft.hard_packet_limit = XFRM_LIMIT(data->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_add_expires_seconds = data->lifetime->time.rekey;
+ sa->lft.hard_add_expires_seconds = data->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)
+ switch (data->enc_alg)
{
case ENCR_UNDEFINED:
/* no encryption */
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:
{
struct xfrm_algo_aead *algo;
- alg_name = lookup_algorithm(encryption_algs, enc_alg);
+ alg_name = lookup_algorithm(ENCRYPTION_ALGORITHM, data->enc_alg);
if (alg_name == NULL)
{
DBG1(DBG_KNL, "algorithm %N not supported by kernel!",
- encryption_algorithm_names, enc_alg);
- return FAILED;
+ encryption_algorithm_names, data->enc_alg);
+ goto failed;
}
DBG2(DBG_KNL, " using encryption algorithm %N with key size %d",
- encryption_algorithm_names, enc_alg, enc_key.len * 8);
+ encryption_algorithm_names, data->enc_alg,
+ data->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))
+ algo = netlink_reserve(hdr, sizeof(request), XFRMA_ALG_AEAD,
+ sizeof(*algo) + data->enc_key.len);
+ if (!algo)
{
- return FAILED;
+ goto failed;
}
-
- algo = (struct xfrm_algo_aead*)RTA_DATA(rthdr);
- algo->alg_key_len = enc_key.len * 8;
+ algo->alg_key_len = data->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);
+ strncpy(algo->alg_name, alg_name, sizeof(algo->alg_name));
+ algo->alg_name[sizeof(algo->alg_name) - 1] = '\0';
+ memcpy(algo->alg_key, data->enc_key.ptr, data->enc_key.len);
break;
}
default:
{
struct xfrm_algo *algo;
- alg_name = lookup_algorithm(encryption_algs, enc_alg);
+ alg_name = lookup_algorithm(ENCRYPTION_ALGORITHM, data->enc_alg);
if (alg_name == NULL)
{
DBG1(DBG_KNL, "algorithm %N not supported by kernel!",
- encryption_algorithm_names, enc_alg);
- return FAILED;
+ encryption_algorithm_names, data->enc_alg);
+ goto failed;
}
DBG2(DBG_KNL, " using encryption algorithm %N with key size %d",
- encryption_algorithm_names, enc_alg, enc_key.len * 8);
+ encryption_algorithm_names, data->enc_alg,
+ data->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))
+ algo = netlink_reserve(hdr, sizeof(request), XFRMA_ALG_CRYPT,
+ sizeof(*algo) + data->enc_key.len);
+ if (!algo)
{
- return FAILED;
+ goto 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);
+ algo->alg_key_len = data->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, data->enc_key.ptr, data->enc_key.len);
}
}
- if (int_alg != AUTH_UNDEFINED)
+ if (data->int_alg != AUTH_UNDEFINED)
{
- alg_name = lookup_algorithm(integrity_algs, int_alg);
+ u_int trunc_len = 0;
+
+ alg_name = lookup_algorithm(INTEGRITY_ALGORITHM, data->int_alg);
if (alg_name == NULL)
{
DBG1(DBG_KNL, "algorithm %N not supported by kernel!",
- integrity_algorithm_names, int_alg);
- return FAILED;
+ integrity_algorithm_names, data->int_alg);
+ goto failed;
}
DBG2(DBG_KNL, " using integrity algorithm %N with key size %d",
- integrity_algorithm_names, int_alg, int_key.len * 8);
+ integrity_algorithm_names, data->int_alg, data->int_key.len * 8);
+
+ switch (data->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 (int_alg == AUTH_HMAC_SHA2_256_128)
+ 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 */
- 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))
+ * 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) + data->int_key.len);
+ if (!algo)
{
- return FAILED;
+ goto 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);
+ algo->alg_key_len = data->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, data->int_key.ptr, data->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))
+ algo = netlink_reserve(hdr, sizeof(request), XFRMA_ALG_AUTH,
+ sizeof(*algo) + data->int_key.len);
+ if (!algo)
{
- return FAILED;
+ goto 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);
+ algo->alg_key_len = data->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, data->int_key.ptr, data->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);
+ 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);
- return FAILED;
+ goto 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))
+ algo = netlink_reserve(hdr, sizeof(request), XFRMA_ALG_COMP,
+ sizeof(*algo));
+ if (!algo)
{
- return FAILED;
+ goto 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);
+ strncpy(algo->alg_name, alg_name, sizeof(algo->alg_name));
+ algo->alg_name[sizeof(algo->alg_name) - 1] = '\0';
}
- if (encap)
+ if (data->encap)
{
struct xfrm_encap_tmpl *tmpl;
- 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))
+ tmpl = netlink_reserve(hdr, sizeof(request), XFRMA_ENCAP, sizeof(*tmpl));
+ if (!tmpl)
{
- return FAILED;
+ goto failed;
}
-
- 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));
+ tmpl->encap_sport = htons(id->src->get_port(id->src));
+ tmpl->encap_dport = htons(id->dst->get_port(id->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
+ * 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);
+ * (or, rather, just ignores) the checksum. If packets pass the IPsec
+ * checks it marks them "checksum ok" so OA isn't needed. */
}
- if (mark.value)
+ if (!add_mark(hdr, sizeof(request), id->mark))
{
- struct xfrm_mark *mrk;
+ goto failed;
+ }
- rthdr->rta_type = XFRMA_MARK;
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_mark));
+ if (data->tfc && id->proto == IPPROTO_ESP && mode == MODE_TUNNEL)
+ { /* the kernel supports TFC padding only for tunnel mode ESP SAs */
+ uint32_t *tfcpad;
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
+ tfcpad = netlink_reserve(hdr, sizeof(request), XFRMA_TFCPAD,
+ sizeof(*tfcpad));
+ if (!tfcpad)
{
- return FAILED;
+ goto failed;
}
-
- mrk = (struct xfrm_mark*)RTA_DATA(rthdr);
- mrk->v = mark.value;
- mrk->m = mark.mask;
- rthdr = XFRM_RTA_NEXT(rthdr);
+ *tfcpad = data->tfc;
}
- if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS)
+ if (id->proto != IPPROTO_COMP)
{
- if (mark.value)
+ /* generally, we don't need a replay window for outbound SAs, however,
+ * when using ESN the kernel rejects the attribute if it is 0 */
+ if (!data->inbound && data->replay_window)
+ {
+ data->replay_window = data->esn ? 1 : 0;
+ }
+ if (data->replay_window != 0 && (data->esn || data->replay_window > 32))
{
- DBG1(DBG_KNL, "unable to add SAD entry with SPI %.8x "
- "(mark %u/0x%8x)", ntohl(spi), mark.value, mark.mask);
+ /* 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;
+ uint32_t bmp_size;
+
+ bmp_size = round_up(data->replay_window, sizeof(uint32_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(uint32_t);
+ replay->replay_window = data->replay_window;
+ DBG2(DBG_KNL, " using replay window of %u packets",
+ data->replay_window);
+
+ if (data->esn)
+ {
+ DBG2(DBG_KNL, " using extended sequence numbers (ESN)");
+ sa->flags |= XFRM_STATE_ESN;
+ }
}
else
{
- DBG1(DBG_KNL, "unable to add SAD entry with SPI %.8x", ntohl(spi));
+ DBG2(DBG_KNL, " using replay window of %u packets",
+ data->replay_window);
+ sa->replay_window = data->replay_window;
}
- return FAILED;
}
- return SUCCESS;
+
+ if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS)
+ {
+ DBG1(DBG_KNL, "unable to add SAD entry with SPI %.8x%s", ntohl(id->spi),
+ markstr);
+ goto failed;
+ }
+
+ status = SUCCESS;
+
+failed:
+ memwipe(&request, sizeof(request));
+ return status;
}
/**
- * Get the replay state (i.e. sequence numbers) of an SA.
+ * 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 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)
+static void get_replay_state(private_kernel_netlink_ipsec_t *this,
+ kernel_ipsec_sa_id_t *sa,
+ struct xfrm_replay_state_esn **replay_esn,
+ uint32_t *replay_esn_len,
+ struct xfrm_replay_state **replay,
+ struct xfrm_lifetime_cur **lifetime)
{
netlink_buf_t request;
struct nlmsghdr *hdr, *out = NULL;
memset(&request, 0, sizeof(request));
- DBG2(DBG_KNL, "querying replay state from SAD entry with SPI %.8x", ntohl(spi));
+ DBG2(DBG_KNL, "querying replay state from SAD entry with SPI %.8x",
+ ntohl(sa->spi));
- hdr = (struct nlmsghdr*)request;
+ 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 = (struct xfrm_aevent_id*)NLMSG_DATA(hdr);
+ 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);
+ host2xfrm(sa->dst, &aevent_id->sa_id.daddr);
+ aevent_id->sa_id.spi = sa->spi;
+ aevent_id->sa_id.proto = sa->proto;
+ aevent_id->sa_id.family = sa->dst->get_family(sa->dst);
+
+ if (!add_mark(hdr, sizeof(request), sa->mark))
+ {
+ return;
+ }
if (this->socket_xfrm->send(this->socket_xfrm, hdr, &out, &len) == SUCCESS)
{
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);
+ DBG1(DBG_KNL, "querying replay state from SAD entry "
+ "failed: %s (%d)", strerror(-err->error), -err->error);
break;
}
default:
}
}
- 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 (out_aevent)
{
- if (rta->rta_type == XFRMA_REPLAY_VAL &&
- RTA_PAYLOAD(rta) == sizeof(struct xfrm_replay_state))
+ rta = XFRM_RTA(out, struct xfrm_aevent_id);
+ rtasize = XFRM_PAYLOAD(out, struct xfrm_aevent_id);
+ while (RTA_OK(rta, rtasize))
{
- memcpy(replay, RTA_DATA(rta), RTA_PAYLOAD(rta));
- free(out);
- return SUCCESS;
+ 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);
}
- 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;
}
METHOD(kernel_ipsec_t, query_sa, status_t,
- private_kernel_netlink_ipsec_t *this, host_t *src, host_t *dst,
- u_int32_t spi, protocol_id_t protocol, mark_t mark, u_int64_t *bytes)
+ private_kernel_netlink_ipsec_t *this, kernel_ipsec_sa_id_t *id,
+ kernel_ipsec_query_sa_t *data, uint64_t *bytes, uint64_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;
+ char markstr[32] = "";
memset(&request, 0, sizeof(request));
+ format_mark(markstr, sizeof(markstr), id->mark);
- if (mark.value)
- {
- DBG2(DBG_KNL, "querying SAD entry with SPI %.8x (mark %u/0x%8x)",
- ntohl(spi), mark.value, mark.mask);
- }
- else
- {
- DBG2(DBG_KNL, "querying SAD entry with SPI %.8x", ntohl(spi));
- }
- hdr = (struct nlmsghdr*)request;
+ DBG2(DBG_KNL, "querying SAD entry with SPI %.8x%s", ntohl(id->spi),
+ markstr);
+
+ 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 = (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);
+ sa_id = NLMSG_DATA(hdr);
+ host2xfrm(id->dst, &sa_id->daddr);
+ sa_id->spi = id->spi;
+ sa_id->proto = id->proto;
+ sa_id->family = id->dst->get_family(id->dst);
- if (mark.value)
+ if (!add_mark(hdr, sizeof(request), id->mark))
{
- struct xfrm_mark *mrk;
- struct rtattr *rthdr = XFRM_RTA(hdr, struct xfrm_usersa_id);
-
- rthdr->rta_type = XFRMA_MARK;
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_mark));
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- mrk = (struct xfrm_mark*)RTA_DATA(rthdr);
- mrk->v = mark.value;
- mrk->m = mark.mask;
+ return FAILED;
}
if (this->socket_xfrm->send(this->socket_xfrm, hdr, &out, &len) == SUCCESS)
{
case XFRM_MSG_NEWSA:
{
- sa = (struct xfrm_usersa_info*)NLMSG_DATA(hdr);
+ 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%8x) 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);
- }
+ DBG1(DBG_KNL, "querying SAD entry with SPI %.8x%s failed: "
+ "%s (%d)", ntohl(id->spi), markstr,
+ strerror(-err->error), -err->error);
break;
}
default:
if (sa == NULL)
{
- DBG2(DBG_KNL, "unable to query SAD entry with SPI %.8x", ntohl(spi));
- free(out);
- return FAILED;
+ DBG2(DBG_KNL, "unable to query SAD entry with SPI %.8x%s",
+ ntohl(id->spi), markstr);
}
- *bytes = sa->curlft.bytes;
-
+ 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 SUCCESS;
+ 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, protocol_id_t protocol, u_int16_t cpi, mark_t mark)
+ private_kernel_netlink_ipsec_t *this, kernel_ipsec_sa_id_t *id,
+ kernel_ipsec_del_sa_t *data)
{
netlink_buf_t request;
struct nlmsghdr *hdr;
struct xfrm_usersa_id *sa_id;
+ char markstr[32] = "";
/* if IPComp was used, we first delete the additional IPComp SA */
- if (cpi)
+ if (data->cpi)
{
- del_sa(this, src, dst, htonl(ntohs(cpi)), IPPROTO_COMP, 0, mark);
+ kernel_ipsec_sa_id_t ipcomp_id = {
+ .src = id->src,
+ .dst = id->dst,
+ .spi = htonl(ntohs(data->cpi)),
+ .proto = IPPROTO_COMP,
+ .mark = id->mark,
+ };
+ kernel_ipsec_del_sa_t ipcomp = {};
+ del_sa(this, &ipcomp_id, &ipcomp);
}
memset(&request, 0, sizeof(request));
+ format_mark(markstr, sizeof(markstr), id->mark);
- if (mark.value)
- {
- DBG2(DBG_KNL, "deleting SAD entry with SPI %.8x (mark %u/0x%8x)",
- ntohl(spi), mark.value, mark.mask);
- }
- else
- {
- DBG2(DBG_KNL, "deleting SAD entry with SPI %.8x", ntohl(spi));
- }
- hdr = (struct nlmsghdr*)request;
+ DBG2(DBG_KNL, "deleting SAD entry with SPI %.8x%s", ntohl(id->spi),
+ markstr);
+
+ 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 = (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);
+ sa_id = NLMSG_DATA(hdr);
+ host2xfrm(id->dst, &sa_id->daddr);
+ sa_id->spi = id->spi;
+ sa_id->proto = id->proto;
+ sa_id->family = id->dst->get_family(id->dst);
- if (mark.value)
- {
- struct xfrm_mark *mrk;
- struct rtattr *rthdr = XFRM_RTA(hdr, struct xfrm_usersa_id);
-
- rthdr->rta_type = XFRMA_MARK;
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_mark));
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- mrk = (struct xfrm_mark*)RTA_DATA(rthdr);
- mrk->v = mark.value;
- mrk->m = mark.mask;
- }
-
- if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS)
+ if (!add_mark(hdr, sizeof(request), id->mark))
{
- if (mark.value)
- {
- DBG1(DBG_KNL, "unable to delete SAD entry with SPI %.8x "
- "(mark %u/0x%8x)", ntohl(spi), mark.value, mark.mask);
- }
- else
- {
- DBG1(DBG_KNL, "unable to delete SAD entry with SPI %.8x", ntohl(spi));
- }
return FAILED;
}
- if (mark.value)
- {
- DBG2(DBG_KNL, "deleted SAD entry with SPI %.8x (mark %u/0x%8x)",
- ntohl(spi), mark.value, mark.mask);
- }
- else
+
+ switch (this->socket_xfrm->send_ack(this->socket_xfrm, hdr))
{
- DBG2(DBG_KNL, "deleted SAD entry with SPI %.8x", ntohl(spi));
+ case SUCCESS:
+ DBG2(DBG_KNL, "deleted SAD entry with SPI %.8x%s",
+ ntohl(id->spi), markstr);
+ return SUCCESS;
+ case NOT_FOUND:
+ return NOT_FOUND;
+ default:
+ DBG1(DBG_KNL, "unable to delete SAD entry with SPI %.8x%s",
+ ntohl(id->spi), markstr);
+ return FAILED;
}
- return SUCCESS;
}
METHOD(kernel_ipsec_t, update_sa, status_t,
- 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, mark_t mark)
+ private_kernel_netlink_ipsec_t *this, kernel_ipsec_sa_id_t *id,
+ kernel_ipsec_update_sa_t *data)
{
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;
struct rtattr *rta;
size_t rtasize;
struct xfrm_encap_tmpl* tmpl = NULL;
- bool got_replay_state = FALSE;
- struct xfrm_replay_state replay;
+ struct xfrm_replay_state *replay = NULL;
+ struct xfrm_replay_state_esn *replay_esn = NULL;
+ struct xfrm_lifetime_cur *lifetime = NULL;
+ uint32_t replay_esn_len = 0;
+ kernel_ipsec_del_sa_t del = { 0 };
+ status_t status = FAILED;
+ char markstr[32] = "";
/* 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);
+ if (data->cpi)
+ {
+ kernel_ipsec_sa_id_t ipcomp_id = {
+ .src = id->src,
+ .dst = id->dst,
+ .spi = htonl(ntohs(data->cpi)),
+ .proto = IPPROTO_COMP,
+ .mark = id->mark,
+ };
+ kernel_ipsec_update_sa_t ipcomp = {
+ .new_src = data->new_src,
+ .new_dst = data->new_dst,
+ };
+ update_sa(this, &ipcomp_id, &ipcomp);
}
memset(&request, 0, sizeof(request));
+ format_mark(markstr, sizeof(markstr), id->mark);
- DBG2(DBG_KNL, "querying SAD entry with SPI %.8x for update", ntohl(spi));
+ DBG2(DBG_KNL, "querying SAD entry with SPI %.8x%s for update",
+ ntohl(id->spi), markstr);
/* query the existing SA first */
- hdr = (struct nlmsghdr*)request;
+ 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 = (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);
+ sa_id = NLMSG_DATA(hdr);
+ host2xfrm(id->dst, &sa_id->daddr);
+ sa_id->spi = id->spi;
+ sa_id->proto = id->proto;
+ sa_id->family = id->dst->get_family(id->dst);
+
+ if (!add_mark(hdr, sizeof(request), id->mark))
+ {
+ return FAILED;
+ }
if (this->socket_xfrm->send(this->socket_xfrm, hdr, &out, &len) == SUCCESS)
{
}
if (out_sa == NULL)
{
- DBG1(DBG_KNL, "unable to update SAD entry with SPI %.8x", ntohl(spi));
- free(out);
- return FAILED;
+ DBG1(DBG_KNL, "unable to update SAD entry with SPI %.8x%s",
+ ntohl(id->spi), markstr);
+ goto failed;
}
- /* try to get the replay state */
- if (get_replay_state(this, spi, protocol, dst, &replay) == SUCCESS)
- {
- got_replay_state = TRUE;
- }
+ get_replay_state(this, id, &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)
+ if (del_sa(this, id, &del) != SUCCESS)
{
- DBG1(DBG_KNL, "unable to delete old SAD entry with SPI %.8x", ntohl(spi));
- free(out);
- return FAILED;
+ DBG1(DBG_KNL, "unable to delete old SAD entry with SPI %.8x%s",
+ ntohl(id->spi), markstr);
+ 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);
+ DBG2(DBG_KNL, "updating SAD entry with SPI %.8x%s from %#H..%#H to "
+ "%#H..%#H", ntohl(id->spi), markstr, id->src, id->dst, data->new_src,
+ data->new_dst);
/* copy over the SA from out to request */
- hdr = (struct nlmsghdr*)request;
- memcpy(hdr, out, min(out->nlmsg_len, sizeof(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);
- sa->family = new_dst->get_family(new_dst);
+ memcpy(sa, NLMSG_DATA(out), sizeof(struct xfrm_usersa_info));
+ sa->family = data->new_dst->get_family(data->new_dst);
- if (!src->ip_equals(src, new_src))
+ if (!id->src->ip_equals(id->src, data->new_src))
{
- host2xfrm(new_src, &sa->saddr);
+ host2xfrm(data->new_src, &sa->saddr);
}
- if (!dst->ip_equals(dst, new_dst))
+ if (!id->dst->ip_equals(id->dst, data->new_dst))
{
- host2xfrm(new_dst, &sa->id.daddr);
+ host2xfrm(data->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))
+ 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 || data->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));
+ tmpl = RTA_DATA(rta);
+ tmpl->encap_sport = ntohs(data->new_src->get_port(data->new_src));
+ tmpl->encap_dport = ntohs(data->new_dst->get_port(data->new_dst));
}
- memcpy(pos, rta, rta->rta_len);
- pos += RTA_ALIGN(rta->rta_len);
- hdr->nlmsg_len += RTA_ALIGN(rta->rta_len);
+ netlink_add_attribute(hdr, rta->rta_type,
+ chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta)),
+ sizeof(request));
}
rta = RTA_NEXT(rta, rtasize);
}
- rta = (struct rtattr*)pos;
- if (tmpl == NULL && new_encap)
+ if (tmpl == NULL && data->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))
+ tmpl = netlink_reserve(hdr, sizeof(request), XFRMA_ENCAP, sizeof(*tmpl));
+ if (!tmpl)
{
- return FAILED;
+ goto 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));
+ tmpl->encap_sport = ntohs(data->new_src->get_port(data->new_src));
+ tmpl->encap_dport = ntohs(data->new_dst->get_port(data->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));
+ if (replay_esn)
+ {
+ struct xfrm_replay_state_esn *state;
- hdr->nlmsg_len += rta->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
+ state = netlink_reserve(hdr, sizeof(request), XFRMA_REPLAY_ESN_VAL,
+ replay_esn_len);
+ if (!state)
{
- return FAILED;
+ goto failed;
}
- memcpy(RTA_DATA(rta), &replay, sizeof(replay));
-
- rta = XFRM_RTA_NEXT(rta);
+ memcpy(state, replay_esn, replay_esn_len);
}
-
- if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS)
+ else if (replay)
{
- DBG1(DBG_KNL, "unable to update SAD entry with SPI %.8x", ntohl(spi));
- free(out);
- return FAILED;
- }
- free(out);
-
- 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, u_int32_t spi, protocol_id_t protocol,
- u_int32_t reqid, mark_t mark, 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->mark = mark.value & mark.mask;
- policy->direction = direction;
+ struct xfrm_replay_state *state;
- /* 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++;
- if (mark.value)
- {
- DBG2(DBG_KNL, "policy %R === %R %N (mark %u/0x%8x) "
- "already exists, increasing refcount",
- src_ts, dst_ts, policy_dir_names, direction,
- mark.value, mark.mask);
- }
- else
+ state = netlink_reserve(hdr, sizeof(request), XFRMA_REPLAY_VAL,
+ sizeof(*state));
+ if (!state)
{
- DBG2(DBG_KNL, "policy %R === %R %N "
- "already exists, increasing refcount",
- src_ts, dst_ts, policy_dir_names, direction);
+ goto failed;
}
- free(policy);
- policy = current;
- found = TRUE;
+ memcpy(state, replay, sizeof(*state));
}
else
- { /* apply the new one, if we have no such policy */
- this->policies->put(this->policies, policy, policy);
- policy->refcount = 1;
+ {
+ DBG1(DBG_KNL, "unable to copy replay state from old SAD entry with "
+ "SPI %.8x%s", ntohl(id->spi), markstr);
}
-
- if (mark.value)
+ if (lifetime)
{
- DBG2(DBG_KNL, "adding policy %R === %R %N (mark %u/0x%8x)",
- src_ts, dst_ts, policy_dir_names, direction,
- mark.value, mark.mask);
+ 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
{
- DBG2(DBG_KNL, "adding policy %R === %R %N",
- src_ts, dst_ts, policy_dir_names, direction);
+ DBG1(DBG_KNL, "unable to copy usage stats from old SAD entry with "
+ "SPI %.8x%s", ntohl(id->spi), markstr);
}
- 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));
+ if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS)
+ {
+ DBG1(DBG_KNL, "unable to update SAD entry with SPI %.8x%s",
+ ntohl(id->spi), markstr);
+ goto failed;
+ }
- 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);
+ status = SUCCESS;
+failed:
+ free(replay);
+ free(replay_esn);
+ free(lifetime);
+ memwipe(out, len);
+ memwipe(&request, sizeof(request));
+ free(out);
- /* 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;
+ 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 {
+ uint8_t proto;
+ char *name;
+ } protos[] = {
+ { IPPROTO_AH, "AH" },
+ { IPPROTO_ESP, "ESP" },
+ { IPPROTO_COMP, "IPComp" },
+ };
+ int i;
- 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));
+ memset(&request, 0, sizeof(request));
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
+ 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));
- struct xfrm_user_tmpl *tmpl = (struct xfrm_user_tmpl*)RTA_DATA(rthdr);
+ flush = NLMSG_DATA(hdr);
- if (ipcomp != IPCOMP_NONE)
+ for (i = 0; i < countof(protos); i++)
{
- 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);
+ DBG2(DBG_KNL, "flushing all %s SAD entries", protos[i].name);
- host2xfrm(src, &tmpl->saddr);
- host2xfrm(dst, &tmpl->id.daddr);
+ flush->proto = protos[i].proto;
- /* 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))
+ 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;
+}
- tmpl++;
-
- /* use transport mode for ESP if we have a tunnel mode IPcomp SA */
- mode = MODE_TRANSPORT;
+/**
+ * Unlock the mutex and signal waiting threads
+ */
+static void policy_change_done(private_kernel_netlink_ipsec_t *this,
+ policy_entry_t *policy)
+{
+ policy->working = FALSE;
+ if (policy->waiting)
+ { /* don't need to wake threads waiting for other policies */
+ this->condvar->broadcast(this->condvar);
+ }
+ this->mutex->unlock(this->mutex);
+}
+
+/**
+ * Install a route for the given policy if enabled and required
+ */
+static void install_route(private_kernel_netlink_ipsec_t *this,
+ policy_entry_t *policy, policy_sa_t *mapping, ipsec_sa_t *ipsec)
+{
+ policy_sa_out_t *out = (policy_sa_out_t*)mapping;
+ route_entry_t *route;
+ host_t *iface;
+
+ INIT(route,
+ .prefixlen = policy->sel.prefixlen_d,
+ );
+
+ if (charon->kernel->get_address_by_ts(charon->kernel, out->src_ts,
+ &route->src_ip, NULL) == SUCCESS)
+ {
+ if (!ipsec->dst->is_anyaddr(ipsec->dst))
+ {
+ route->gateway = charon->kernel->get_nexthop(charon->kernel,
+ ipsec->dst, -1, ipsec->src,
+ &route->if_name);
+ }
+ else
+ { /* for shunt policies */
+ iface = xfrm2host(policy->sel.family, &policy->sel.daddr, 0);
+ route->gateway = charon->kernel->get_nexthop(charon->kernel,
+ iface, policy->sel.prefixlen_d,
+ route->src_ip, &route->if_name);
+ iface->destroy(iface);
+ }
+ route->dst_net = chunk_alloc(policy->sel.family == AF_INET ? 4 : 16);
+ memcpy(route->dst_net.ptr, &policy->sel.daddr, route->dst_net.len);
+
+ /* get the interface to install the route for, if we haven't one yet.
+ * If we have a local address, use it. Otherwise (for shunt policies)
+ * use the route's source address. */
+ if (!route->if_name)
+ {
+ iface = ipsec->src;
+ if (iface->is_anyaddr(iface))
+ {
+ iface = route->src_ip;
+ }
+ if (!charon->kernel->get_interface(charon->kernel, iface,
+ &route->if_name))
+ {
+ route_entry_destroy(route);
+ return;
+ }
+ }
+ if (policy->route)
+ {
+ route_entry_t *old = policy->route;
+ if (route_entry_equals(old, route))
+ {
+ route_entry_destroy(route);
+ return;
+ }
+ /* uninstall previously installed route */
+ if (charon->kernel->del_route(charon->kernel, 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", out->src_ts, out->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", out->dst_ts,
+ route->gateway, route->src_ip, route->if_name);
+ switch (charon->kernel->add_route(charon->kernel, 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
{
- /* when using IPcomp, only the IPcomp SA uses tmp src/dst addresses */
- host2xfrm(src, &tmpl->saddr);
- host2xfrm(dst, &tmpl->id.daddr);
+ free(route);
}
+}
+
+/**
+ * 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;
- 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);
- rthdr = XFRM_RTA_NEXT(rthdr);
+ /* clone the policy so we are able to check it out again later */
+ memcpy(&clone, policy, sizeof(policy_entry_t));
- if (mark.value)
- {
- struct xfrm_mark *mrk;
+ 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));
- rthdr->rta_type = XFRMA_MARK;
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_mark));
+ policy_info = NLMSG_DATA(hdr);
+ policy_info->sel = policy->sel;
+ policy_info->dir = policy->direction;
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
+ /* 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 && ipsec->cfg.reqid)
+ {
+ struct xfrm_user_tmpl *tmpl;
+ struct {
+ uint8_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)
+ {
+ policy_change_done(this, policy);
return FAILED;
}
- mrk = (struct xfrm_mark*)RTA_DATA(rthdr);
- mrk->v = mark.value;
- mrk->m = mark.mask;
+ 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 (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS)
+ if (!add_mark(hdr, sizeof(request), ipsec->mark))
{
- DBG1(DBG_KNL, "unable to add policy %R === %R %N", src_ts, dst_ts,
- policy_dir_names, direction);
+ policy_change_done(this, policy);
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);
+ }
+ this->mutex->lock(this->mutex);
+ if (status != SUCCESS)
+ {
+ policy_change_done(this, policy);
+ 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
+ * - this is an outbound policy (to just get one for each child)
* - routing is not disabled via strongswan.conf
+ * - the selector is not for a specific protocol/port
+ * - we are in tunnel/BEET mode or install a bypass policy
*/
- if (policy->route == NULL && direction == POLICY_FWD &&
- mode != MODE_TRANSPORT && this->install_routes)
+ if (policy->direction == POLICY_OUT && this->install_routes &&
+ !policy->sel.proto && !policy->sel.dport && !policy->sel.sport)
+ {
+ if (mapping->type == POLICY_PASS ||
+ (mapping->type == POLICY_IPSEC && ipsec->cfg.mode != MODE_TRANSPORT))
+ {
+ install_route(this, policy, mapping, ipsec);
+ }
+ }
+ policy_change_done(this, policy);
+ return SUCCESS;
+}
+
+METHOD(kernel_ipsec_t, add_policy, status_t,
+ private_kernel_netlink_ipsec_t *this, kernel_ipsec_policy_id_t *id,
+ kernel_ipsec_manage_policy_t *data)
+{
+ policy_entry_t *policy, *current;
+ policy_sa_t *assigned_sa, *current_sa;
+ enumerator_t *enumerator;
+ bool found = FALSE, update = TRUE;
+ char markstr[32] = "";
+ uint32_t cur_priority = 0;
+ int use_count;
+
+ /* create a policy */
+ INIT(policy,
+ .sel = ts2selector(id->src_ts, id->dst_ts, id->interface),
+ .mark = id->mark.value & id->mark.mask,
+ .direction = id->dir,
+ .reqid = data->sa->reqid,
+ );
+ format_mark(markstr, sizeof(markstr), id->mark);
+
+ /* find the policy, which matches EXACTLY */
+ this->mutex->lock(this->mutex);
+ current = this->policies->get(this->policies, policy);
+ if (current)
{
- route_entry_t *route = malloc_thing(route_entry_t);
+ if (current->reqid && data->sa->reqid &&
+ current->reqid != data->sa->reqid)
+ {
+ DBG1(DBG_CFG, "unable to install policy %R === %R %N%s for reqid "
+ "%u, the same policy for reqid %u exists",
+ id->src_ts, id->dst_ts, policy_dir_names, id->dir, markstr,
+ data->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%s already exists, increasing "
+ "refcount", id->src_ts, id->dst_ts, policy_dir_names, id->dir,
+ markstr);
+ policy_entry_destroy(this, policy);
+ policy = current;
+ found = TRUE;
- if (charon->kernel_interface->get_address_by_ts(charon->kernel_interface,
- dst_ts, &route->src_ip) == SUCCESS)
+ policy->waiting++;
+ while (policy->working)
{
- /* 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)
+ this->condvar->wait(this->condvar, this->mutex);
+ }
+ policy->waiting--;
+ policy->working = 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, id->dir, data->type, data->src,
+ data->dst, id->src_ts, id->dst_ts, id->mark, data->sa);
+ assigned_sa->auto_priority = get_priority(policy, data->prio, id->interface);
+ assigned_sa->priority = this->get_priority ? this->get_priority(id, data)
+ : data->manual_prio;
+ assigned_sa->priority = assigned_sa->priority ?: assigned_sa->auto_priority;
+
+ /* insert the SA according to its priority */
+ enumerator = policy->used_by->create_enumerator(policy->used_by);
+ while (enumerator->enumerate(enumerator, (void**)¤t_sa))
+ {
+ if (current_sa->priority > assigned_sa->priority)
+ {
+ break;
+ }
+ if (current_sa->priority == assigned_sa->priority)
+ {
+ /* in case of equal manual prios order SAs by automatic priority */
+ if (current_sa->auto_priority > assigned_sa->auto_priority)
{
- 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;
- }
+ break;
}
- else
+ /* prefer SAs with a reqid over those without */
+ if (current_sa->auto_priority == assigned_sa->auto_priority &&
+ (!current_sa->sa->cfg.reqid || assigned_sa->sa->cfg.reqid))
{
- route_entry_destroy(route);
+ break;
}
}
- else
+ if (update)
{
- free(route);
+ cur_priority = current_sa->priority;
+ update = FALSE;
}
}
+ policy->used_by->insert_before(policy->used_by, enumerator, assigned_sa);
+ enumerator->destroy(enumerator);
+
+ use_count = policy->used_by->get_count(policy->used_by);
+ if (!update)
+ { /* we don't update the policy if the priority is lower than that of
+ * the currently installed one */
+ policy_change_done(this, policy);
+ DBG2(DBG_KNL, "not updating policy %R === %R %N%s [priority %u,"
+ "refcount %d]", id->src_ts, id->dst_ts, policy_dir_names,
+ id->dir, markstr, cur_priority, use_count);
+ return SUCCESS;
+ }
+ policy->reqid = assigned_sa->sa->cfg.reqid;
+
+ if (this->policy_update)
+ {
+ found = TRUE;
+ }
+
+ DBG2(DBG_KNL, "%s policy %R === %R %N%s [priority %u, refcount %d]",
+ found ? "updating" : "adding", id->src_ts, id->dst_ts,
+ policy_dir_names, id->dir, markstr, assigned_sa->priority, use_count);
+
+ if (add_policy_internal(this, policy, assigned_sa, found) != SUCCESS)
+ {
+ DBG1(DBG_KNL, "unable to %s policy %R === %R %N%s",
+ found ? "update" : "add", id->src_ts, id->dst_ts,
+ policy_dir_names, id->dir, markstr);
+ 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,
- u_int32_t *use_time)
+ private_kernel_netlink_ipsec_t *this, kernel_ipsec_policy_id_t *id,
+ kernel_ipsec_query_policy_t *data, 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;
+ char markstr[32] = "";
memset(&request, 0, sizeof(request));
+ format_mark(markstr, sizeof(markstr), id->mark);
- if (mark.value)
- {
- DBG2(DBG_KNL, "querying policy %R === %R %N (mark %u/0x%8x)",
- src_ts, dst_ts, policy_dir_names, direction,
- mark.value, mark.mask);
- }
- else
- {
- DBG2(DBG_KNL, "querying policy %R === %R %N", src_ts, dst_ts,
- policy_dir_names, direction);
- }
- hdr = (struct nlmsghdr*)request;
+ DBG2(DBG_KNL, "querying policy %R === %R %N%s", id->src_ts, id->dst_ts,
+ policy_dir_names, id->dir, markstr);
+
+ 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 = (struct xfrm_userpolicy_id*)NLMSG_DATA(hdr);
- policy_id->sel = ts2selector(src_ts, dst_ts);
- policy_id->dir = direction;
+ policy_id = NLMSG_DATA(hdr);
+ policy_id->sel = ts2selector(id->src_ts, id->dst_ts, id->interface);
+ policy_id->dir = id->dir;
- if (mark.value)
+ if (!add_mark(hdr, sizeof(request), id->mark))
{
- struct xfrm_mark *mrk;
- struct rtattr *rthdr = XFRM_RTA(hdr, struct xfrm_userpolicy_id);
-
- rthdr->rta_type = XFRMA_MARK;
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_mark));
-
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- mrk = (struct xfrm_mark*)RTA_DATA(rthdr);
- mrk->v = mark.value;
- mrk->m = mark.mask;
+ return FAILED;
}
if (this->socket_xfrm->send(this->socket_xfrm, hdr, &out, &len) == SUCCESS)
{
case XFRM_MSG_NEWPOLICY:
{
- policy = (struct xfrm_userpolicy_info*)NLMSG_DATA(hdr);
+ policy = NLMSG_DATA(hdr);
break;
}
case NLMSG_ERROR:
if (policy == NULL)
{
- DBG2(DBG_KNL, "unable to query policy %R === %R %N", src_ts, dst_ts,
- policy_dir_names, direction);
+ DBG2(DBG_KNL, "unable to query policy %R === %R %N%s", id->src_ts,
+ id->dst_ts, policy_dir_names, id->dir, markstr);
free(out);
return FAILED;
}
}
METHOD(kernel_ipsec_t, del_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,
- bool unrouted)
+ private_kernel_netlink_ipsec_t *this, kernel_ipsec_policy_id_t *id,
+ kernel_ipsec_manage_policy_t *data)
{
- policy_entry_t *current, policy, *to_delete = NULL;
- route_entry_t *route;
+ 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;
-
- if (mark.value)
- {
- DBG2(DBG_KNL, "deleting policy %R === %R %N (mark %u/0x%8x)",
- src_ts, dst_ts, policy_dir_names, direction,
- mark.value, mark.mask);
- }
- else
- {
- DBG2(DBG_KNL, "deleting policy %R === %R %N",
- src_ts, dst_ts, policy_dir_names, direction);
- }
+ bool is_installed = TRUE;
+ uint32_t priority, auto_priority, cur_priority;
+ ipsec_sa_t assigned_sa = {
+ .src = data->src,
+ .dst = data->dst,
+ .mark = id->mark,
+ .cfg = *data->sa,
+ };
+ char markstr[32] = "";
+ int use_count;
+ status_t status = SUCCESS;
+
+ format_mark(markstr, sizeof(markstr), id->mark);
+
+ DBG2(DBG_KNL, "deleting policy %R === %R %N%s", id->src_ts, id->dst_ts,
+ policy_dir_names, id->dir, markstr);
/* 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;
+ policy.sel = ts2selector(id->src_ts, id->dst_ts, id->interface);
+ policy.mark = id->mark.value & id->mark.mask;
+ policy.direction = id->dir;
/* find the policy */
this->mutex->lock(this->mutex);
current = this->policies->get(this->policies, &policy);
- if (current)
+ 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);
+ DBG1(DBG_KNL, "deleting policy %R === %R %N%s failed, not found",
+ id->src_ts, id->dst_ts, policy_dir_names, id->dir, markstr);
+ this->mutex->unlock(this->mutex);
+ return NOT_FOUND;
}
- this->mutex->unlock(this->mutex);
- if (!to_delete)
+ current->waiting++;
+ while (current->working)
{
- if (mark.value)
+ this->condvar->wait(this->condvar, this->mutex);
+ }
+ current->working = TRUE;
+ current->waiting--;
+
+ /* remove mapping to SA by reqid and priority */
+ auto_priority = get_priority(current, data->prio,id->interface);
+ priority = this->get_priority ? this->get_priority(id, data)
+ : data->manual_prio;
+ priority = priority ?: auto_priority;
+
+ enumerator = current->used_by->create_enumerator(current->used_by);
+ while (enumerator->enumerate(enumerator, (void**)&mapping))
+ {
+ if (priority == mapping->priority &&
+ auto_priority == mapping->auto_priority &&
+ data->type == mapping->type &&
+ ipsec_sa_equals(mapping->sa, &assigned_sa))
{
- DBG1(DBG_KNL, "deleting policy %R === %R %N (mark %u/0x%8x) "
- "failed, not found", src_ts, dst_ts, policy_dir_names,
- direction, mark.value, mark.mask);
+ current->used_by->remove_at(current->used_by, enumerator);
+ policy_sa_destroy(mapping, &id->dir, this);
+ break;
}
- else
+ if (is_installed)
{
- DBG1(DBG_KNL, "deleting policy %R === %R %N failed, not found",
- src_ts, dst_ts, policy_dir_names, direction);
+ cur_priority = mapping->priority;
+ is_installed = FALSE;
}
- return NOT_FOUND;
+ }
+ enumerator->destroy(enumerator);
+
+ use_count = current->used_by->get_count(current->used_by);
+ if (use_count > 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 */
+ policy_change_done(this, current);
+ DBG2(DBG_KNL, "not updating policy %R === %R %N%s [priority %u, "
+ "refcount %d]", id->src_ts, id->dst_ts, policy_dir_names,
+ id->dir, markstr, cur_priority, use_count);
+ return SUCCESS;
+ }
+ current->used_by->get_first(current->used_by, (void**)&mapping);
+ current->reqid = mapping->sa->cfg.reqid;
+
+ DBG2(DBG_KNL, "updating policy %R === %R %N%s [priority %u, "
+ "refcount %d]", id->src_ts, id->dst_ts, policy_dir_names, id->dir,
+ markstr, mapping->priority, use_count);
+
+ if (add_policy_internal(this, current, mapping, TRUE) != SUCCESS)
+ {
+ DBG1(DBG_KNL, "unable to update policy %R === %R %N%s",
+ id->src_ts, id->dst_ts, policy_dir_names, id->dir, markstr);
+ return FAILED;
+ }
+ return SUCCESS;
}
memset(&request, 0, sizeof(request));
- hdr = (struct nlmsghdr*)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 = (struct xfrm_userpolicy_id*)NLMSG_DATA(hdr);
- policy_id->sel = to_delete->sel;
- policy_id->dir = direction;
+ policy_id = NLMSG_DATA(hdr);
+ policy_id->sel = current->sel;
+ policy_id->dir = id->dir;
- if (mark.value)
+ if (!add_mark(hdr, sizeof(request), id->mark))
{
- struct xfrm_mark *mrk;
- struct rtattr *rthdr = XFRM_RTA(hdr, struct xfrm_userpolicy_id);
+ policy_change_done(this, current);
+ return FAILED;
+ }
- rthdr->rta_type = XFRMA_MARK;
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_mark));
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
+ if (current->route)
+ {
+ route_entry_t *route = current->route;
+ if (charon->kernel->del_route(charon->kernel, route->dst_net,
+ route->prefixlen, route->gateway,
+ route->src_ip, route->if_name) != SUCCESS)
{
- return FAILED;
+ DBG1(DBG_KNL, "error uninstalling route installed with policy "
+ "%R === %R %N%s", id->src_ts, id->dst_ts, policy_dir_names,
+ id->dir, markstr);
}
-
- mrk = (struct xfrm_mark*)RTA_DATA(rthdr);
- mrk->v = mark.value;
- mrk->m = mark.mask;
}
-
- route = to_delete->route;
- free(to_delete);
+ 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%8x)", 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;
+ DBG1(DBG_KNL, "unable to delete policy %R === %R %N%s", id->src_ts,
+ id->dst_ts, policy_dir_names, id->dir, markstr);
+ status = FAILED;
}
- if (route)
+ this->mutex->lock(this->mutex);
+ if (!current->waiting)
+ { /* only if no other thread still needs the policy */
+ this->policies->remove(this->policies, current);
+ policy_entry_destroy(this, current);
+ this->mutex->unlock(this->mutex);
+ }
+ else
{
- 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);
+ policy_change_done(this, current);
+ }
+ return status;
+}
+
+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;
}
-METHOD(kernel_ipsec_t, bypass_socket, bool,
- private_kernel_netlink_ipsec_t *this, int fd, int family)
+/**
+ * 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;
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));
+ DBG1(DBG_KNL, "unable to set IPSEC_POLICY on socket: %s (%d)",
+ strerror(errno), 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));
+ DBG1(DBG_KNL, "unable to set IPSEC_POLICY on socket: %s (%d)",
+ strerror(errno), 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 */
+ uint16_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, uint16_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;
enumerator_t *enumerator;
policy_entry_t *policy;
- if (this->job)
- {
- this->job->cancel(this->job);
- }
+ 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))
{
- free(policy);
+ policy_entry_destroy(this, policy);
}
enumerator->destroy(enumerator);
this->policies->destroy(this->policies);
+ this->sas->destroy(this->sas);
+ this->condvar->destroy(this->condvar);
this->mutex->destroy(this->mutex);
free(this);
}
+/**
+ * Get the currently configured SPD hashing thresholds for an address family
+ */
+static bool get_spd_hash_thresh(private_kernel_netlink_ipsec_t *this,
+ int type, uint8_t *lbits, uint8_t *rbits)
+{
+ netlink_buf_t request;
+ struct nlmsghdr *hdr, *out;
+ struct xfrmu_spdhthresh *thresh;
+ struct rtattr *rta;
+ size_t len, rtasize;
+ bool success = FALSE;
+
+ memset(&request, 0, sizeof(request));
+
+ hdr = &request.hdr;
+ hdr->nlmsg_flags = NLM_F_REQUEST;
+ hdr->nlmsg_type = XFRM_MSG_GETSPDINFO;
+ hdr->nlmsg_len = NLMSG_LENGTH(sizeof(uint32_t));
+
+ 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_NEWSPDINFO:
+ {
+ rta = XFRM_RTA(hdr, uint32_t);
+ rtasize = XFRM_PAYLOAD(hdr, uint32_t);
+ while (RTA_OK(rta, rtasize))
+ {
+ if (rta->rta_type == type &&
+ RTA_PAYLOAD(rta) == sizeof(*thresh))
+ {
+ thresh = RTA_DATA(rta);
+ *lbits = thresh->lbits;
+ *rbits = thresh->rbits;
+ success = TRUE;
+ break;
+ }
+ rta = RTA_NEXT(rta, rtasize);
+ }
+ break;
+ }
+ case NLMSG_ERROR:
+ {
+ struct nlmsgerr *err = NLMSG_DATA(hdr);
+ DBG1(DBG_KNL, "getting SPD hash threshold failed: %s (%d)",
+ strerror(-err->error), -err->error);
+ break;
+ }
+ default:
+ hdr = NLMSG_NEXT(hdr, len);
+ continue;
+ case NLMSG_DONE:
+ break;
+ }
+ break;
+ }
+ free(out);
+ }
+ return success;
+}
+
+/**
+ * Configure SPD hashing threshold for an address family
+ */
+static void setup_spd_hash_thresh(private_kernel_netlink_ipsec_t *this,
+ char *key, int type, uint8_t def)
+{
+ struct xfrmu_spdhthresh *thresh;
+ struct nlmsghdr *hdr;
+ netlink_buf_t request;
+ uint8_t lbits, rbits;
+
+ if (!get_spd_hash_thresh(this, type, &lbits, &rbits))
+ {
+ return;
+ }
+ memset(&request, 0, sizeof(request));
+
+ hdr = &request.hdr;
+ hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ hdr->nlmsg_type = XFRM_MSG_NEWSPDINFO;
+ hdr->nlmsg_len = NLMSG_LENGTH(sizeof(uint32_t));
+
+ thresh = netlink_reserve(hdr, sizeof(request), type, sizeof(*thresh));
+ thresh->lbits = lib->settings->get_int(lib->settings,
+ "%s.plugins.kernel-netlink.spdh_thresh.%s.lbits",
+ def, lib->ns, key);
+ thresh->rbits = lib->settings->get_int(lib->settings,
+ "%s.plugins.kernel-netlink.spdh_thresh.%s.rbits",
+ def, lib->ns, key);
+ if (thresh->lbits != lbits || thresh->rbits != rbits)
+ {
+ if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS)
+ {
+ DBG1(DBG_KNL, "setting SPD hash threshold failed");
+ }
+ }
+}
+
/*
* Described in header.
*/
kernel_netlink_ipsec_t *kernel_netlink_ipsec_create()
{
private_kernel_netlink_ipsec_t *this;
- struct sockaddr_nl addr;
- int fd;
+ 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),
+ .condvar = condvar_create(CONDVAR_TYPE_DEFAULT),
+ .get_priority = dlsym(RTLD_DEFAULT,
+ "kernel_netlink_get_priority_custom"),
+ .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,
- "charon.install_routes", TRUE),
+ "%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),
);
- /* disable lifetimes for allocated SPIs in kernel */
- fd = open("/proc/sys/net/core/xfrm_acq_expires", O_WRONLY);
- if (fd)
+ 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)
{
- ignore_result(write(fd, "165", 3));
- close(fd);
+ 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);
+ 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;
}
- memset(&addr, 0, sizeof(addr));
- addr.nl_family = AF_NETLINK;
+ setup_spd_hash_thresh(this, "ipv4", XFRMA_SPD_IPV4_HTHRESH, 32);
+ setup_spd_hash_thresh(this, "ipv6", XFRMA_SPD_IPV6_HTHRESH, 128);
- /* 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)))
+ if (register_for_events)
{
- DBG1(DBG_KNL, "unable to bind XFRM event socket");
- destroy(this);
- return NULL;
+ 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: %s (%d)",
+ strerror(errno), errno);
+ 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: %s (%d)",
+ strerror(errno), errno);
+ destroy(this);
+ return NULL;
+ }
+ lib->watcher->add(lib->watcher, this->socket_xfrm_events, WATCHER_READ,
+ (watcher_cb_t)receive_events, this);
}
- this->job = callback_job_create((callback_job_cb_t)receive_events,
- this, NULL, NULL);
- hydra->processor->queue_job(hydra->processor, (job_t*)this->job);
return &this->public;
}
-
projects / strongswan.git / blobdiff