summaryrefslogtreecommitdiff
path: root/src/charon/kernel/kernel_interface.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/charon/kernel/kernel_interface.c')
-rw-r--r--src/charon/kernel/kernel_interface.c2977
1 files changed, 164 insertions, 2813 deletions
diff --git a/src/charon/kernel/kernel_interface.c b/src/charon/kernel/kernel_interface.c
index f5cb40977..3c82b580e 100644
--- a/src/charon/kernel/kernel_interface.c
+++ b/src/charon/kernel/kernel_interface.c
@@ -1,13 +1,6 @@
/*
- * Copyright (C) 2006-2008 Tobias Brunner
- * Copyright (C) 2005-2007 Martin Willi
- * Copyright (C) 2006-2007 Fabian Hartmann, Noah Heusser
- * Copyright (C) 2006 Daniel Roethlisberger
- * Copyright (C) 2005 Jan Hutter
+ * Copyright (C) 2008 Tobias Brunner
* Hochschule fuer Technik Rapperswil
- * Copyright (C) 2003 Herbert Xu.
- *
- * Based on xfrm code from pluto.
*
* 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
@@ -19,2855 +12,292 @@
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
- * $Id: kernel_interface.c 4104 2008-06-24 15:35:09Z tobias $
+ * $Id: kernel_interface.c 4406 2008-10-10 08:36:01Z martin $
*/
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/time.h>
-#include <linux/netlink.h>
-#include <linux/rtnetlink.h>
-#include <linux/xfrm.h>
-#include <linux/udp.h>
-#include <pthread.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <string.h>
-#include <net/if.h>
-#include <sys/ioctl.h>
-
#include "kernel_interface.h"
+#include <pthread.h>
+
#include <daemon.h>
#include <utils/linked_list.h>
-#include <processing/jobs/delete_child_sa_job.h>
-#include <processing/jobs/rekey_child_sa_job.h>
-#include <processing/jobs/acquire_job.h>
-#include <processing/jobs/callback_job.h>
-#include <processing/jobs/roam_job.h>
-
-/** routing table for routes installed by us */
-#ifndef IPSEC_ROUTING_TABLE
-#define IPSEC_ROUTING_TABLE 100
-#endif
-#ifndef IPSEC_ROUTING_TABLE_PRIO
-#define IPSEC_ROUTING_TABLE_PRIO 100
-#endif
-
-/** kernel level protocol identifiers */
-#define KERNEL_ESP 50
-#define KERNEL_AH 51
-
-/** default priority of installed policies */
-#define PRIO_LOW 3000
-#define PRIO_HIGH 2000
-
-/** delay before firing roam jobs (ms) */
-#define ROAM_DELAY 100
-
-#define BUFFER_SIZE 1024
-
-/**
- * returns a pointer to the first rtattr following the nlmsghdr *nlh and the
- * 'usual' netlink data x like 'struct xfrm_usersa_info'
- */
-#define XFRM_RTA(nlh, x) ((struct rtattr*)(NLMSG_DATA(nlh) + NLMSG_ALIGN(sizeof(x))))
-/**
- * returns a pointer to the next rtattr following rta.
- * !!! do not use this to parse messages. use RTA_NEXT and RTA_OK instead !!!
- */
-#define XFRM_RTA_NEXT(rta) ((struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len)))
-/**
- * returns the total size of attached rta data
- * (after 'usual' netlink data x like 'struct xfrm_usersa_info')
- */
-#define XFRM_PAYLOAD(nlh, x) NLMSG_PAYLOAD(nlh, sizeof(x))
-
-typedef struct kernel_algorithm_t kernel_algorithm_t;
-
-/**
- * Mapping from the algorithms defined in IKEv2 to
- * kernel level algorithm names and their key length
- */
-struct kernel_algorithm_t {
- /**
- * Identifier specified in IKEv2
- */
- int ikev2_id;
-
- /**
- * Name of the algorithm, as used as kernel identifier
- */
- char *name;
-
- /**
- * Key length in bits, if fixed size
- */
- u_int key_size;
-};
-#define END_OF_LIST -1
-
-/**
- * Algorithms for encryption
- */
-static kernel_algorithm_t encryption_algs[] = {
-/* {ENCR_DES_IV64, "***", 0}, */
- {ENCR_DES, "des", 64},
- {ENCR_3DES, "des3_ede", 192},
-/* {ENCR_RC5, "***", 0}, */
-/* {ENCR_IDEA, "***", 0}, */
- {ENCR_CAST, "cast128", 0},
- {ENCR_BLOWFISH, "blowfish", 0},
-/* {ENCR_3IDEA, "***", 0}, */
-/* {ENCR_DES_IV32, "***", 0}, */
- {ENCR_NULL, "cipher_null", 0},
- {ENCR_AES_CBC, "aes", 0},
-/* {ENCR_AES_CTR, "***", 0}, */
- {ENCR_AES_CCM_ICV8, "rfc4309(ccm(aes))", 64}, /* key_size = ICV size */
- {ENCR_AES_CCM_ICV12, "rfc4309(ccm(aes))", 96}, /* key_size = ICV size */
- {ENCR_AES_CCM_ICV16, "rfc4309(ccm(aes))", 128}, /* key_size = ICV size */
- {ENCR_AES_GCM_ICV8, "rfc4106(gcm(aes))", 64}, /* key_size = ICV size */
- {ENCR_AES_GCM_ICV12, "rfc4106(gcm(aes))", 96}, /* key_size = ICV size */
- {ENCR_AES_GCM_ICV16, "rfc4106(gcm(aes))", 128}, /* key_size = ICV size */
- {END_OF_LIST, NULL, 0},
-};
-
-/**
- * Algorithms for integrity protection
- */
-static kernel_algorithm_t integrity_algs[] = {
- {AUTH_HMAC_MD5_96, "md5", 128},
- {AUTH_HMAC_SHA1_96, "sha1", 160},
- {AUTH_HMAC_SHA2_256_128, "sha256", 256},
- {AUTH_HMAC_SHA2_384_192, "sha384", 384},
- {AUTH_HMAC_SHA2_512_256, "sha512", 512},
-/* {AUTH_DES_MAC, "***", 0}, */
-/* {AUTH_KPDK_MD5, "***", 0}, */
- {AUTH_AES_XCBC_96, "xcbc(aes)", 128},
- {END_OF_LIST, NULL, 0},
-};
-
-/**
- * Algorithms for IPComp
- */
-static kernel_algorithm_t compression_algs[] = {
-/* {IPCOMP_OUI, "***", 0}, */
- {IPCOMP_DEFLATE, "deflate", 0},
- {IPCOMP_LZS, "lzs", 0},
- {IPCOMP_LZJH, "lzjh", 0},
- {END_OF_LIST, NULL, 0},
-};
-
-/**
- * Look up a kernel algorithm name and its key size
- */
-static char* lookup_algorithm(kernel_algorithm_t *kernel_algo,
- u_int16_t ikev2_algo, u_int16_t *key_size)
-{
- while (kernel_algo->ikev2_id != END_OF_LIST)
- {
- if (ikev2_algo == kernel_algo->ikev2_id)
- {
- /* match, evaluate key length */
- if (key_size && *key_size == 0)
- { /* update key size if not set */
- *key_size = kernel_algo->key_size;
- }
- return kernel_algo->name;
- }
- kernel_algo++;
- }
- return NULL;
-}
-
-typedef struct route_entry_t route_entry_t;
-
-/**
- * installed routing entry
- */
-struct route_entry_t {
-
- /** Index of the interface the route is bound to */
- int if_index;
-
- /** Source ip of the route */
- host_t *src_ip;
-
- /** gateway for this route */
- host_t *gateway;
-
- /** Destination net */
- chunk_t dst_net;
-
- /** Destination net prefixlen */
- u_int8_t prefixlen;
-};
-
-/**
- * destroy an route_entry_t object
- */
-static void route_entry_destroy(route_entry_t *this)
-{
- this->src_ip->destroy(this->src_ip);
- this->gateway->destroy(this->gateway);
- chunk_free(&this->dst_net);
- free(this);
-}
-
-typedef struct policy_entry_t policy_entry_t;
-
-/**
- * installed kernel policy.
- */
-struct policy_entry_t {
-
- /** direction of this policy: in, out, forward */
- u_int8_t direction;
-
- /** reqid of the policy */
- u_int32_t reqid;
-
- /** parameters of installed policy */
- struct xfrm_selector sel;
-
- /** associated route installed for this policy */
- route_entry_t *route;
-
- /** by how many CHILD_SA's this policy is used */
- u_int refcount;
-};
-
-typedef struct addr_entry_t addr_entry_t;
-
-/**
- * IP address in an inface_entry_t
- */
-struct addr_entry_t {
-
- /** The ip address */
- host_t *ip;
-
- /** virtual IP managed by us */
- bool virtual;
-
- /** scope of the address */
- u_char scope;
-
- /** Number of times this IP is used, if virtual */
- u_int refcount;
-};
-
-/**
- * destroy a addr_entry_t object
- */
-static void addr_entry_destroy(addr_entry_t *this)
-{
- this->ip->destroy(this->ip);
- free(this);
-}
-
-typedef struct iface_entry_t iface_entry_t;
-
-/**
- * A network interface on this system, containing addr_entry_t's
- */
-struct iface_entry_t {
-
- /** interface index */
- int ifindex;
-
- /** name of the interface */
- char ifname[IFNAMSIZ];
-
- /** interface flags, as in netdevice(7) SIOCGIFFLAGS */
- u_int flags;
-
- /** list of addresses as host_t */
- linked_list_t *addrs;
-};
-
-/**
- * destroy an interface entry
- */
-static void iface_entry_destroy(iface_entry_t *this)
-{
- this->addrs->destroy_function(this->addrs, (void*)addr_entry_destroy);
- free(this);
-}
+#include <utils/mutex.h>
typedef struct private_kernel_interface_t private_kernel_interface_t;
/**
- * Private variables and functions of kernel_interface class.
+ * Private data of a kernel_interface_t object.
*/
struct private_kernel_interface_t {
+
/**
- * Public part of the kernel_interface_t object.
+ * Public part of kernel_interface_t object.
*/
kernel_interface_t public;
/**
- * mutex to lock access to netlink socket
- */
- pthread_mutex_t nl_mutex;
-
- /**
- * mutex to lock access to various lists
+ * list of registered ipsec kernel interfaces
*/
- pthread_mutex_t mutex;
+ linked_list_t *ipsec_interfaces;
/**
- * condition variable to signal virtual IP add/removal
+ * list of registered network kernel interfaces
*/
- pthread_cond_t cond;
+ linked_list_t *net_interfaces;
/**
- * List of installed policies (policy_entry_t)
+ * ipsec interface
*/
- linked_list_t *policies;
+ kernel_ipsec_t *ipsec;
/**
- * Cached list of interfaces and its adresses (iface_entry_t)
+ * network interface
*/
- linked_list_t *ifaces;
+ kernel_net_t *net;
/**
- * iterator used in hook()
+ * locking mutex
*/
- iterator_t *hiter;
-
- /**
- * job receiving netlink events
- */
- callback_job_t *job;
-
- /**
- * current sequence number for netlink request
- */
- int seq;
-
- /**
- * Netlink xfrm socket (IPsec)
- */
- int socket_xfrm;
-
- /**
- * netlink xfrm socket to receive acquire and expire events
- */
- int socket_xfrm_events;
-
- /**
- * Netlink rt socket (routing)
- */
- int socket_rt;
-
- /**
- * Netlink rt socket to receive address change events
- */
- int socket_rt_events;
-
- /**
- * time of the last roam_job
- */
- struct timeval last_roam;
-
- /**
- * whether to install routes along policies
- */
- bool install_routes;
-
- /**
- * routing table to install routes
- */
- int routing_table;
-
- /**
- * priority of used routing table
- */
- int routing_table_prio;
+ mutex_t *mutex;
};
/**
- * convert a host_t to a struct xfrm_address
+ * Implementation of kernel_interface_t.get_spi
*/
-static void host2xfrm(host_t *host, xfrm_address_t *xfrm)
+static status_t get_spi(private_kernel_interface_t *this, host_t *src, host_t *dst,
+ protocol_id_t protocol, u_int32_t reqid, u_int32_t *spi)
{
- chunk_t chunk = host->get_address(host);
- memcpy(xfrm, chunk.ptr, min(chunk.len, sizeof(xfrm_address_t)));
+ return this->ipsec->get_spi(this->ipsec, src, dst, protocol, reqid, spi);
}
/**
- * convert a traffic selector address range to subnet and its mask.
+ * Implementation of kernel_interface_t.get_cpi
*/
-static void ts2subnet(traffic_selector_t* ts,
- xfrm_address_t *net, u_int8_t *mask)
+static status_t get_cpi(private_kernel_interface_t *this, host_t *src, host_t *dst,
+ u_int32_t reqid, u_int16_t *cpi)
{
- /* there is no way to do this cleanly, as the address range may
- * be anything else but a subnet. We use from_addr as subnet
- * and try to calculate a usable subnet mask.
- */
- int byte, bit;
- bool found = FALSE;
- chunk_t from, to;
- size_t size = (ts->get_type(ts) == TS_IPV4_ADDR_RANGE) ? 4 : 16;
-
- from = ts->get_from_address(ts);
- to = ts->get_to_address(ts);
-
- *mask = (size * 8);
- /* go trough all bits of the addresses, beginning in the front.
- * as long as they are equal, the subnet gets larger
- */
- for (byte = 0; byte < size; byte++)
- {
- for (bit = 7; bit >= 0; bit--)
- {
- if ((1<<bit & from.ptr[byte]) != (1<<bit & to.ptr[byte]))
- {
- *mask = ((7 - bit) + (byte * 8));
- found = TRUE;
- break;
- }
- }
- if (found)
- {
- break;
- }
- }
- memcpy(net, from.ptr, from.len);
- chunk_free(&from);
- chunk_free(&to);
+ return this->ipsec->get_cpi(this->ipsec, src, dst, reqid, cpi);
}
/**
- * convert a traffic selector port range to port/portmask
+ * Implementation of kernel_interface_t.add_sa
*/
-static void ts2ports(traffic_selector_t* ts,
- u_int16_t *port, u_int16_t *mask)
+static status_t add_sa(private_kernel_interface_t *this, host_t *src, host_t *dst,
+ u_int32_t spi, protocol_id_t protocol, u_int32_t reqid,
+ u_int64_t expire_soft, u_int64_t expire_hard,
+ u_int16_t enc_alg, u_int16_t enc_size,
+ u_int16_t int_alg, u_int16_t int_size,
+ prf_plus_t *prf_plus, ipsec_mode_t mode, u_int16_t ipcomp, bool encap,
+ bool update)
{
- /* linux does not seem to accept complex portmasks. Only
- * any or a specific port is allowed. We set to any, if we have
- * a port range, or to a specific, if we have one port only.
- */
- u_int16_t from, to;
-
- from = ts->get_from_port(ts);
- to = ts->get_to_port(ts);
-
- if (from == to)
- {
- *port = htons(from);
- *mask = ~0;
- }
- else
- {
- *port = 0;
- *mask = 0;
- }
+ return this->ipsec->add_sa(this->ipsec, src, dst, spi, protocol, reqid,
+ expire_soft, expire_hard, enc_alg, enc_size, int_alg, int_size,
+ prf_plus, mode, ipcomp, encap, update);
}
/**
- * convert a pair of traffic_selectors to a xfrm_selector
+ * Implementation of kernel_interface_t.update_sa
*/
-static struct xfrm_selector ts2selector(traffic_selector_t *src,
- traffic_selector_t *dst)
+static status_t update_sa(private_kernel_interface_t *this, u_int32_t spi,
+ protocol_id_t protocol, host_t *src, host_t *dst,
+ host_t *new_src, host_t *new_dst, bool encap)
{
- struct xfrm_selector sel;
-
- memset(&sel, 0, sizeof(sel));
- sel.family = src->get_type(src) == TS_IPV4_ADDR_RANGE ? AF_INET : AF_INET6;
- /* src or dest proto may be "any" (0), use more restrictive one */
- sel.proto = max(src->get_protocol(src), dst->get_protocol(dst));
- ts2subnet(dst, &sel.daddr, &sel.prefixlen_d);
- ts2subnet(src, &sel.saddr, &sel.prefixlen_s);
- ts2ports(dst, &sel.dport, &sel.dport_mask);
- ts2ports(src, &sel.sport, &sel.sport_mask);
- sel.ifindex = 0;
- sel.user = 0;
-
- return sel;
+ return this->ipsec->update_sa(this->ipsec, spi, protocol, src, dst, new_src,
+ new_dst, encap);
}
/**
- * Creates an rtattr and adds it to the netlink message
+ * Implementation of kernel_interface_t.query_sa
*/
-static void add_attribute(struct nlmsghdr *hdr, int rta_type, chunk_t data,
- size_t buflen)
+static status_t query_sa(private_kernel_interface_t *this, host_t *dst, u_int32_t spi,
+ protocol_id_t protocol, u_int32_t *use_time)
{
- struct rtattr *rta;
-
- if (NLMSG_ALIGN(hdr->nlmsg_len) + RTA_ALIGN(data.len) > buflen)
- {
- DBG1(DBG_KNL, "unable to add attribute, buffer too small");
- return;
- }
-
- rta = (struct rtattr*)(((char*)hdr) + NLMSG_ALIGN(hdr->nlmsg_len));
- rta->rta_type = rta_type;
- rta->rta_len = RTA_LENGTH(data.len);
- memcpy(RTA_DATA(rta), data.ptr, data.len);
- hdr->nlmsg_len = NLMSG_ALIGN(hdr->nlmsg_len) + rta->rta_len;
-}
-
-/**
- * process a XFRM_MSG_ACQUIRE from kernel
- */
-static void process_acquire(private_kernel_interface_t *this, struct nlmsghdr *hdr)
-{
- u_int32_t reqid = 0;
- job_t *job;
- struct rtattr *rtattr = XFRM_RTA(hdr, struct xfrm_user_acquire);
- size_t rtsize = XFRM_PAYLOAD(hdr, struct xfrm_user_tmpl);
-
- if (RTA_OK(rtattr, rtsize))
- {
- if (rtattr->rta_type == XFRMA_TMPL)
- {
- struct xfrm_user_tmpl* tmpl = (struct xfrm_user_tmpl*)RTA_DATA(rtattr);
- reqid = tmpl->reqid;
- }
- }
- if (reqid == 0)
- {
- DBG1(DBG_KNL, "received a XFRM_MSG_ACQUIRE, but no reqid found");
- return;
- }
- DBG2(DBG_KNL, "received a XFRM_MSG_ACQUIRE");
- DBG1(DBG_KNL, "creating acquire job for CHILD_SA with reqid %d", reqid);
- job = (job_t*)acquire_job_create(reqid);
- charon->processor->queue_job(charon->processor, job);
-}
-
-/**
- * process a XFRM_MSG_EXPIRE from kernel
- */
-static void process_expire(private_kernel_interface_t *this, struct nlmsghdr *hdr)
-{
- job_t *job;
- protocol_id_t protocol;
- u_int32_t spi, reqid;
- struct xfrm_user_expire *expire;
-
- expire = (struct xfrm_user_expire*)NLMSG_DATA(hdr);
- protocol = expire->state.id.proto;
- protocol = (protocol == KERNEL_ESP) ? PROTO_ESP : (protocol == KERNEL_AH) ? PROTO_AH : protocol;
- spi = expire->state.id.spi;
- reqid = expire->state.reqid;
-
- DBG2(DBG_KNL, "received a XFRM_MSG_EXPIRE");
-
- if (protocol != PROTO_ESP && protocol != PROTO_AH)
- {
- DBG2(DBG_KNL, "ignoring XFRM_MSG_EXPIRE for SA 0x%x (reqid %d) which is "
- "not a CHILD_SA", ntohl(spi), reqid);
- return;
- }
-
- DBG1(DBG_KNL, "creating %s job for %N CHILD_SA 0x%x (reqid %d)",
- expire->hard ? "delete" : "rekey", protocol_id_names,
- protocol, ntohl(spi), reqid);
- if (expire->hard)
- {
- job = (job_t*)delete_child_sa_job_create(reqid, protocol, spi);
- }
- else
- {
- job = (job_t*)rekey_child_sa_job_create(reqid, protocol, spi);
- }
- charon->processor->queue_job(charon->processor, job);
-}
-
-/**
- * start a roaming job. We delay it for a second and fire only one job
- * for multiple events. Otherwise we would create two many jobs.
- */
-static void fire_roam_job(private_kernel_interface_t *this, bool address)
-{
- struct timeval now;
-
- if (gettimeofday(&now, NULL) == 0)
- {
- if (timercmp(&now, &this->last_roam, >))
- {
- now.tv_usec += ROAM_DELAY * 1000;
- while (now.tv_usec > 1000000)
- {
- now.tv_sec++;
- now.tv_usec -= 1000000;
- }
- this->last_roam = now;
- charon->scheduler->schedule_job(charon->scheduler,
- (job_t*)roam_job_create(address), ROAM_DELAY);
- }
- }
-}
-
-/**
- * process RTM_NEWLINK/RTM_DELLINK from kernel
- */
-static void process_link(private_kernel_interface_t *this,
- struct nlmsghdr *hdr, bool event)
-{
- struct ifinfomsg* msg = (struct ifinfomsg*)(NLMSG_DATA(hdr));
- struct rtattr *rta = IFLA_RTA(msg);
- size_t rtasize = IFLA_PAYLOAD (hdr);
- iterator_t *iterator;
- iface_entry_t *current, *entry = NULL;
- char *name = NULL;
- bool update = FALSE;
-
- while(RTA_OK(rta, rtasize))
- {
- switch (rta->rta_type)
- {
- case IFLA_IFNAME:
- name = RTA_DATA(rta);
- break;
- }
- rta = RTA_NEXT(rta, rtasize);
- }
- if (!name)
- {
- name = "(unknown)";
- }
-
- switch (hdr->nlmsg_type)
- {
- case RTM_NEWLINK:
- {
- if (msg->ifi_flags & IFF_LOOPBACK)
- { /* ignore loopback interfaces */
- break;
- }
- iterator = this->ifaces->create_iterator_locked(this->ifaces,
- &this->mutex);
- while (iterator->iterate(iterator, (void**)&current))
- {
- if (current->ifindex == msg->ifi_index)
- {
- entry = current;
- break;
- }
- }
- if (!entry)
- {
- entry = malloc_thing(iface_entry_t);
- entry->ifindex = msg->ifi_index;
- entry->flags = 0;
- entry->addrs = linked_list_create();
- this->ifaces->insert_last(this->ifaces, entry);
- }
- memcpy(entry->ifname, name, IFNAMSIZ);
- entry->ifname[IFNAMSIZ-1] = '\0';
- if (event)
- {
- if (!(entry->flags & IFF_UP) && (msg->ifi_flags & IFF_UP))
- {
- update = TRUE;
- DBG1(DBG_KNL, "interface %s activated", name);
- }
- if ((entry->flags & IFF_UP) && !(msg->ifi_flags & IFF_UP))
- {
- update = TRUE;
- DBG1(DBG_KNL, "interface %s deactivated", name);
- }
- }
- entry->flags = msg->ifi_flags;
- iterator->destroy(iterator);
- break;
- }
- case RTM_DELLINK:
- {
- iterator = this->ifaces->create_iterator_locked(this->ifaces,
- &this->mutex);
- while (iterator->iterate(iterator, (void**)&current))
- {
- if (current->ifindex == msg->ifi_index)
- {
- /* we do not remove it, as an address may be added to a
- * "down" interface and we wan't to know that. */
- current->flags = msg->ifi_flags;
- break;
- }
- }
- iterator->destroy(iterator);
- break;
- }
- }
-
- /* send an update to all IKE_SAs */
- if (update && event)
- {
- fire_roam_job(this, TRUE);
- }
-}
-
-/**
- * process RTM_NEWADDR/RTM_DELADDR from kernel
- */
-static void process_addr(private_kernel_interface_t *this,
- struct nlmsghdr *hdr, bool event)
-{
- struct ifaddrmsg* msg = (struct ifaddrmsg*)(NLMSG_DATA(hdr));
- struct rtattr *rta = IFA_RTA(msg);
- size_t rtasize = IFA_PAYLOAD (hdr);
- host_t *host = NULL;
- iterator_t *ifaces, *addrs;
- iface_entry_t *iface;
- addr_entry_t *addr;
- chunk_t local = chunk_empty, address = chunk_empty;
- bool update = FALSE, found = FALSE, changed = FALSE;
-
- while(RTA_OK(rta, rtasize))
- {
- switch (rta->rta_type)
- {
- case IFA_LOCAL:
- local.ptr = RTA_DATA(rta);
- local.len = RTA_PAYLOAD(rta);
- break;
- case IFA_ADDRESS:
- address.ptr = RTA_DATA(rta);
- address.len = RTA_PAYLOAD(rta);
- break;
- }
- rta = RTA_NEXT(rta, rtasize);
- }
-
- /* For PPP interfaces, we need the IFA_LOCAL address,
- * IFA_ADDRESS is the peers address. But IFA_LOCAL is
- * not included in all cases (IPv6?), so fallback to IFA_ADDRESS. */
- if (local.ptr)
- {
- host = host_create_from_chunk(msg->ifa_family, local, 0);
- }
- else if (address.ptr)
- {
- host = host_create_from_chunk(msg->ifa_family, address, 0);
- }
-
- if (host == NULL)
- { /* bad family? */
- return;
- }
-
- ifaces = this->ifaces->create_iterator_locked(this->ifaces, &this->mutex);
- while (ifaces->iterate(ifaces, (void**)&iface))
- {
- if (iface->ifindex == msg->ifa_index)
- {
- addrs = iface->addrs->create_iterator(iface->addrs, TRUE);
- while (addrs->iterate(addrs, (void**)&addr))
- {
- if (host->ip_equals(host, addr->ip))
- {
- found = TRUE;
- if (hdr->nlmsg_type == RTM_DELADDR)
- {
- changed = TRUE;
- addrs->remove(addrs);
- if (!addr->virtual)
- {
- DBG1(DBG_KNL, "%H disappeared from %s",
- host, iface->ifname);
- }
- addr_entry_destroy(addr);
- }
- else if (hdr->nlmsg_type == RTM_NEWADDR && addr->virtual)
- {
- addr->refcount = 1;
- }
- }
- }
- addrs->destroy(addrs);
-
- if (hdr->nlmsg_type == RTM_NEWADDR)
- {
- if (!found)
- {
- found = TRUE;
- changed = TRUE;
- addr = malloc_thing(addr_entry_t);
- addr->ip = host->clone(host);
- addr->virtual = FALSE;
- addr->refcount = 1;
- addr->scope = msg->ifa_scope;
-
- iface->addrs->insert_last(iface->addrs, addr);
- if (event)
- {
- DBG1(DBG_KNL, "%H appeared on %s", host, iface->ifname);
- }
- }
- }
- if (found && (iface->flags & IFF_UP))
- {
- update = TRUE;
- }
- break;
- }
- }
- ifaces->destroy(ifaces);
- host->destroy(host);
-
- /* send an update to all IKE_SAs */
- if (update && event && changed)
- {
- fire_roam_job(this, TRUE);
- }
-}
-
-/**
- * Receives events from kernel
- */
-static job_requeue_t receive_events(private_kernel_interface_t *this)
-{
- char response[1024];
- struct nlmsghdr *hdr = (struct nlmsghdr*)response;
- struct sockaddr_nl addr;
- socklen_t addr_len = sizeof(addr);
- int len, oldstate, maxfd, selected;
- fd_set rfds;
-
- FD_ZERO(&rfds);
- FD_SET(this->socket_xfrm_events, &rfds);
- FD_SET(this->socket_rt_events, &rfds);
- maxfd = max(this->socket_xfrm_events, this->socket_rt_events);
-
- pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &oldstate);
- selected = select(maxfd + 1, &rfds, NULL, NULL, NULL);
- pthread_setcancelstate(oldstate, NULL);
- if (selected <= 0)
- {
- DBG1(DBG_KNL, "selecting on sockets failed: %s", strerror(errno));
- return JOB_REQUEUE_FAIR;
- }
- if (FD_ISSET(this->socket_xfrm_events, &rfds))
- {
- selected = this->socket_xfrm_events;
- }
- else if (FD_ISSET(this->socket_rt_events, &rfds))
- {
- selected = this->socket_rt_events;
- }
- else
- {
- return JOB_REQUEUE_DIRECT;
- }
-
- len = recvfrom(selected, response, sizeof(response), MSG_DONTWAIT,
- (struct sockaddr*)&addr, &addr_len);
- if (len < 0)
- {
- switch (errno)
- {
- case EINTR:
- /* interrupted, try again */
- return JOB_REQUEUE_DIRECT;
- case EAGAIN:
- /* no data ready, select again */
- return JOB_REQUEUE_DIRECT;
- default:
- DBG1(DBG_KNL, "unable to receive from xfrm event socket");
- sleep(1);
- return JOB_REQUEUE_FAIR;
- }
- }
- if (addr.nl_pid != 0)
- { /* not from kernel. not interested, try another one */
- return JOB_REQUEUE_DIRECT;
- }
-
- while (NLMSG_OK(hdr, len))
- {
- /* looks good so far, dispatch netlink message */
- if (selected == this->socket_xfrm_events)
- {
- switch (hdr->nlmsg_type)
- {
- case XFRM_MSG_ACQUIRE:
- process_acquire(this, hdr);
- break;
- case XFRM_MSG_EXPIRE:
- process_expire(this, hdr);
- break;
- default:
- break;
- }
- }
- else if (selected == this->socket_rt_events)
- {
- switch (hdr->nlmsg_type)
- {
- case RTM_NEWADDR:
- case RTM_DELADDR:
- process_addr(this, hdr, TRUE);
- pthread_cond_signal(&this->cond);
- break;
- case RTM_NEWLINK:
- case RTM_DELLINK:
- process_link(this, hdr, TRUE);
- pthread_cond_signal(&this->cond);
- break;
- case RTM_NEWROUTE:
- case RTM_DELROUTE:
- fire_roam_job(this, FALSE);
- break;
- default:
- break;
- }
- }
- hdr = NLMSG_NEXT(hdr, len);
- }
- return JOB_REQUEUE_DIRECT;
+ return this->ipsec->query_sa(this->ipsec, dst, spi, protocol, use_time);
}
/**
- * send a netlink message and wait for a reply
+ * Implementation of kernel_interface_t.del_sa
*/
-static status_t netlink_send(private_kernel_interface_t *this,
- int socket, struct nlmsghdr *in,
- struct nlmsghdr **out, size_t *out_len)
+static status_t del_sa(private_kernel_interface_t *this, host_t *dst, u_int32_t spi,
+ protocol_id_t protocol)
{
- int len, addr_len;
- struct sockaddr_nl addr;
- chunk_t result = chunk_empty, tmp;
- struct nlmsghdr *msg, peek;
-
- pthread_mutex_lock(&this->nl_mutex);
-
- in->nlmsg_seq = ++this->seq;
- in->nlmsg_pid = getpid();
-
- memset(&addr, 0, sizeof(addr));
- addr.nl_family = AF_NETLINK;
- addr.nl_pid = 0;
- addr.nl_groups = 0;
-
- while (TRUE)
- {
- len = sendto(socket, in, in->nlmsg_len, 0,
- (struct sockaddr*)&addr, sizeof(addr));
-
- if (len != in->nlmsg_len)
- {
- if (errno == EINTR)
- {
- /* interrupted, try again */
- continue;
- }
- pthread_mutex_unlock(&this->nl_mutex);
- DBG1(DBG_KNL, "error sending to netlink socket: %s", strerror(errno));
- return FAILED;
- }
- break;
- }
-
- while (TRUE)
- {
- char buf[4096];
- tmp.len = sizeof(buf);
- tmp.ptr = buf;
- msg = (struct nlmsghdr*)tmp.ptr;
-
- memset(&addr, 0, sizeof(addr));
- addr.nl_family = AF_NETLINK;
- addr.nl_pid = getpid();
- addr.nl_groups = 0;
- addr_len = sizeof(addr);
-
- len = recvfrom(socket, tmp.ptr, tmp.len, 0,
- (struct sockaddr*)&addr, &addr_len);
-
- if (len < 0)
- {
- if (errno == EINTR)
- {
- DBG1(DBG_KNL, "got interrupted");
- /* interrupted, try again */
- continue;
- }
- DBG1(DBG_KNL, "error reading from netlink socket: %s", strerror(errno));
- pthread_mutex_unlock(&this->nl_mutex);
- return FAILED;
- }
- if (!NLMSG_OK(msg, len))
- {
- DBG1(DBG_KNL, "received corrupted netlink message");
- pthread_mutex_unlock(&this->nl_mutex);
- return FAILED;
- }
- if (msg->nlmsg_seq != this->seq)
- {
- DBG1(DBG_KNL, "received invalid netlink sequence number");
- if (msg->nlmsg_seq < this->seq)
- {
- continue;
- }
- pthread_mutex_unlock(&this->nl_mutex);
- return FAILED;
- }
-
- tmp.len = len;
- result = chunk_cata("cc", result, tmp);
-
- /* NLM_F_MULTI flag does not seem to be set correctly, we use sequence
- * numbers to detect multi header messages */
- len = recvfrom(socket, &peek, sizeof(peek), MSG_PEEK | MSG_DONTWAIT,
- (struct sockaddr*)&addr, &addr_len);
-
- if (len == sizeof(peek) && peek.nlmsg_seq == this->seq)
- {
- /* seems to be multipart */
- continue;
- }
- break;
- }
-
- *out_len = result.len;
- *out = (struct nlmsghdr*)clalloc(result.ptr, result.len);
-
- pthread_mutex_unlock(&this->nl_mutex);
-
- return SUCCESS;
+ return this->ipsec->del_sa(this->ipsec, dst, spi, protocol);
}
/**
- * send a netlink message and wait for its acknowlegde
+ * Implementation of kernel_interface_t.add_policy
*/
-static status_t netlink_send_ack(private_kernel_interface_t *this,
- int socket, struct nlmsghdr *in)
+static status_t add_policy(private_kernel_interface_t *this, host_t *src, host_t *dst,
+ traffic_selector_t *src_ts, traffic_selector_t *dst_ts,
+ policy_dir_t direction, protocol_id_t protocol,
+ u_int32_t reqid, bool high_prio, ipsec_mode_t mode,
+ u_int16_t ipcomp)
{
- struct nlmsghdr *out, *hdr;
- size_t len;
-
- if (netlink_send(this, socket, in, &out, &len) != SUCCESS)
- {
- return FAILED;
- }
- hdr = out;
- while (NLMSG_OK(hdr, len))
- {
- switch (hdr->nlmsg_type)
- {
- case NLMSG_ERROR:
- {
- struct nlmsgerr* err = (struct nlmsgerr*)NLMSG_DATA(hdr);
-
- if (err->error)
- {
- DBG1(DBG_KNL, "received netlink error: %s (%d)",
- strerror(-err->error), -err->error);
- free(out);
- return FAILED;
- }
- free(out);
- return SUCCESS;
- }
- default:
- hdr = NLMSG_NEXT(hdr, len);
- continue;
- case NLMSG_DONE:
- break;
- }
- break;
- }
- DBG1(DBG_KNL, "netlink request not acknowlegded");
- free(out);
- return FAILED;
+ return this->ipsec->add_policy(this->ipsec, src, dst, src_ts, dst_ts,
+ direction, protocol, reqid, high_prio, mode, ipcomp);
}
-
-/**
- * Initialize a list of local addresses.
- */
-static status_t init_address_list(private_kernel_interface_t *this)
-{
- char request[BUFFER_SIZE];
- struct nlmsghdr *out, *current, *in;
- struct rtgenmsg *msg;
- size_t len;
- iterator_t *ifaces, *addrs;
- iface_entry_t *iface;
- addr_entry_t *addr;
-
- DBG1(DBG_KNL, "listening on interfaces:");
-
- memset(&request, 0, sizeof(request));
- in = (struct nlmsghdr*)&request;
- in->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg));
- in->nlmsg_flags = NLM_F_REQUEST | NLM_F_MATCH | NLM_F_ROOT;
- msg = (struct rtgenmsg*)NLMSG_DATA(in);
- msg->rtgen_family = AF_UNSPEC;
-
- /* get all links */
- in->nlmsg_type = RTM_GETLINK;
- if (netlink_send(this, this->socket_rt, in, &out, &len) != SUCCESS)
- {
- return FAILED;
- }
- current = out;
- while (NLMSG_OK(current, len))
- {
- switch (current->nlmsg_type)
- {
- case NLMSG_DONE:
- break;
- case RTM_NEWLINK:
- process_link(this, current, FALSE);
- /* fall through */
- default:
- current = NLMSG_NEXT(current, len);
- continue;
- }
- break;
- }
- free(out);
-
- /* get all interface addresses */
- in->nlmsg_type = RTM_GETADDR;
- if (netlink_send(this, this->socket_rt, in, &out, &len) != SUCCESS)
- {
- return FAILED;
- }
- current = out;
- while (NLMSG_OK(current, len))
- {
- switch (current->nlmsg_type)
- {
- case NLMSG_DONE:
- break;
- case RTM_NEWADDR:
- process_addr(this, current, FALSE);
- /* fall through */
- default:
- current = NLMSG_NEXT(current, len);
- continue;
- }
- break;
- }
- free(out);
-
- ifaces = this->ifaces->create_iterator_locked(this->ifaces, &this->mutex);
- while (ifaces->iterate(ifaces, (void**)&iface))
- {
- if (iface->flags & IFF_UP)
- {
- DBG1(DBG_KNL, " %s", iface->ifname);
- addrs = iface->addrs->create_iterator(iface->addrs, TRUE);
- while (addrs->iterate(addrs, (void**)&addr))
- {
- DBG1(DBG_KNL, " %H", addr->ip);
- }
- addrs->destroy(addrs);
- }
- }
- ifaces->destroy(ifaces);
- return SUCCESS;
-}
-
-/**
- * iterator hook to iterate over addrs
- */
-static hook_result_t addr_hook(private_kernel_interface_t *this,
- addr_entry_t *in, host_t **out)
-{
- if (in->virtual)
- { /* skip virtual interfaces added by us */
- return HOOK_SKIP;
- }
- if (in->scope >= RT_SCOPE_LINK)
- { /* skip addresses with a unusable scope */
- return HOOK_SKIP;
- }
- *out = in->ip;
- return HOOK_NEXT;
-}
-
/**
- * iterator hook to iterate over ifaces
+ * Implementation of kernel_interface_t.query_policy
*/
-static hook_result_t iface_hook(private_kernel_interface_t *this,
- iface_entry_t *in, host_t **out)
-{
- if (!(in->flags & IFF_UP))
- { /* skip interfaces not up */
- return HOOK_SKIP;
- }
-
- if (this->hiter == NULL)
- {
- this->hiter = in->addrs->create_iterator(in->addrs, TRUE);
- this->hiter->set_iterator_hook(this->hiter,
- (iterator_hook_t*)addr_hook, this);
- }
- while (this->hiter->iterate(this->hiter, (void**)out))
- {
- return HOOK_AGAIN;
- }
- this->hiter->destroy(this->hiter);
- this->hiter = NULL;
- return HOOK_SKIP;
-}
-
-/**
- * Implements kernel_interface_t.create_address_iterator.
- */
-static iterator_t *create_address_iterator(private_kernel_interface_t *this)
-{
- iterator_t *iterator;
-
- /* This iterator is not only hooked, is is double-hooked. As we have stored
- * our addresses in iface_entry->addr_entry->ip, we need to iterate the
- * entries in each interface we iterate. This does the iface_hook. The
- * addr_hook returns the ip instead of the addr_entry. */
-
- iterator = this->ifaces->create_iterator_locked(this->ifaces, &this->mutex);
- iterator->set_iterator_hook(iterator, (iterator_hook_t*)iface_hook, this);
- return iterator;
-}
-
-/**
- * implementation of kernel_interface_t.get_interface_name
- */
-static char *get_interface_name(private_kernel_interface_t *this, host_t* ip)
-{
- iterator_t *ifaces, *addrs;
- iface_entry_t *iface;
- addr_entry_t *addr;
- char *name = NULL;
-
- DBG2(DBG_KNL, "getting interface name for %H", ip);
-
- ifaces = this->ifaces->create_iterator_locked(this->ifaces, &this->mutex);
- while (ifaces->iterate(ifaces, (void**)&iface))
- {
- addrs = iface->addrs->create_iterator(iface->addrs, TRUE);
- while (addrs->iterate(addrs, (void**)&addr))
- {
- if (ip->ip_equals(ip, addr->ip))
- {
- name = strdup(iface->ifname);
- break;
- }
- }
- addrs->destroy(addrs);
- if (name)
- {
- break;
- }
- }
- ifaces->destroy(ifaces);
-
- if (name)
- {
- DBG2(DBG_KNL, "%H is on interface %s", ip, name);
- }
- else
- {
- DBG2(DBG_KNL, "%H is not a local address", ip);
- }
- return name;
-}
-
-/**
- * Tries to find an ip address of a local interface that is included in the
- * supplied traffic selector.
- */
-static status_t get_address_by_ts(private_kernel_interface_t *this,
- traffic_selector_t *ts, host_t **ip)
-{
- iterator_t *ifaces, *addrs;
- iface_entry_t *iface;
- addr_entry_t *addr;
- host_t *host;
- int family;
- bool found = FALSE;
-
- DBG2(DBG_KNL, "getting a local address in traffic selector %R", ts);
-
- /* if we have a family which includes localhost, we do not
- * search for an IP, we use the default */
- family = ts->get_type(ts) == TS_IPV4_ADDR_RANGE ? AF_INET : AF_INET6;
-
- if (family == AF_INET)
- {
- host = host_create_from_string("127.0.0.1", 0);
- }
- else
- {
- host = host_create_from_string("::1", 0);
- }
-
- if (ts->includes(ts, host))
- {
- *ip = host_create_any(family);
- host->destroy(host);
- DBG2(DBG_KNL, "using host %H", *ip);
- return SUCCESS;
- }
- host->destroy(host);
-
- ifaces = this->ifaces->create_iterator_locked(this->ifaces, &this->mutex);
- while (ifaces->iterate(ifaces, (void**)&iface))
- {
- addrs = iface->addrs->create_iterator(iface->addrs, TRUE);
- while (addrs->iterate(addrs, (void**)&addr))
- {
- if (ts->includes(ts, addr->ip))
- {
- found = TRUE;
- *ip = addr->ip->clone(addr->ip);
- break;
- }
- }
- addrs->destroy(addrs);
- if (found)
- {
- break;
- }
- }
- ifaces->destroy(ifaces);
-
- if (!found)
- {
- DBG1(DBG_KNL, "no local address found in traffic selector %R", ts);
- return FAILED;
- }
- DBG2(DBG_KNL, "using host %H", *ip);
- return SUCCESS;
-}
-
-/**
- * get the interface of a local address
- */
-static int get_interface_index(private_kernel_interface_t *this, host_t* ip)
-{
- iterator_t *ifaces, *addrs;
- iface_entry_t *iface;
- addr_entry_t *addr;
- int ifindex = 0;
-
- DBG2(DBG_KNL, "getting iface for %H", ip);
-
- ifaces = this->ifaces->create_iterator_locked(this->ifaces, &this->mutex);
- while (ifaces->iterate(ifaces, (void**)&iface))
- {
- addrs = iface->addrs->create_iterator(iface->addrs, TRUE);
- while (addrs->iterate(addrs, (void**)&addr))
- {
- if (ip->ip_equals(ip, addr->ip))
- {
- ifindex = iface->ifindex;
- break;
- }
- }
- addrs->destroy(addrs);
- if (ifindex)
- {
- break;
- }
- }
- ifaces->destroy(ifaces);
-
- if (ifindex == 0)
- {
- DBG1(DBG_KNL, "unable to get interface for %H", ip);
- }
- return ifindex;
-}
-
-/**
- * get the refcount of a virtual ip
- */
-static int get_vip_refcount(private_kernel_interface_t *this, host_t* ip)
-{
- iterator_t *ifaces, *addrs;
- iface_entry_t *iface;
- addr_entry_t *addr;
- int refcount = 0;
-
- ifaces = this->ifaces->create_iterator(this->ifaces, TRUE);
- while (ifaces->iterate(ifaces, (void**)&iface))
- {
- addrs = iface->addrs->create_iterator(iface->addrs, TRUE);
- while (addrs->iterate(addrs, (void**)&addr))
- {
- if (addr->virtual && (iface->flags & IFF_UP) &&
- ip->ip_equals(ip, addr->ip))
- {
- refcount = addr->refcount;
- break;
- }
- }
- addrs->destroy(addrs);
- if (refcount)
- {
- break;
- }
- }
- ifaces->destroy(ifaces);
-
- return refcount;
-}
-
-/**
- * Manages the creation and deletion of ip addresses on an interface.
- * By setting the appropriate nlmsg_type, the ip will be set or unset.
- */
-static status_t manage_ipaddr(private_kernel_interface_t *this, int nlmsg_type,
- int flags, int if_index, host_t *ip)
+static status_t query_policy(private_kernel_interface_t *this,
+ traffic_selector_t *src_ts, traffic_selector_t *dst_ts,
+ policy_dir_t direction, u_int32_t *use_time)
{
- unsigned char request[BUFFER_SIZE];
- struct nlmsghdr *hdr;
- struct ifaddrmsg *msg;
- chunk_t chunk;
-
- memset(&request, 0, sizeof(request));
-
- chunk = ip->get_address(ip);
-
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags;
- hdr->nlmsg_type = nlmsg_type;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
-
- msg = (struct ifaddrmsg*)NLMSG_DATA(hdr);
- msg->ifa_family = ip->get_family(ip);
- msg->ifa_flags = 0;
- msg->ifa_prefixlen = 8 * chunk.len;
- msg->ifa_scope = RT_SCOPE_UNIVERSE;
- msg->ifa_index = if_index;
-
- add_attribute(hdr, IFA_LOCAL, chunk, sizeof(request));
-
- return netlink_send_ack(this, this->socket_rt, hdr);
+ return this->ipsec->query_policy(this->ipsec, src_ts, dst_ts, direction, use_time);
}
/**
- * Manages source routes in the routing table.
- * By setting the appropriate nlmsg_type, the route added or r.
+ * Implementation of kernel_interface_t.del_policy
*/
-static status_t manage_srcroute(private_kernel_interface_t *this, int nlmsg_type,
- int flags, route_entry_t *route)
+static status_t del_policy(private_kernel_interface_t *this,
+ traffic_selector_t *src_ts, traffic_selector_t *dst_ts,
+ policy_dir_t direction)
{
- unsigned char request[BUFFER_SIZE];
- struct nlmsghdr *hdr;
- struct rtmsg *msg;
- chunk_t chunk;
-
- /* if route is 0.0.0.0/0, we can't install it, as it would
- * overwrite the default route. Instead, we add two routes:
- * 0.0.0.0/1 and 128.0.0.0/1 */
- if (this->routing_table == 0 && route->prefixlen == 0)
- {
- route_entry_t half;
- status_t status;
-
- half.dst_net = chunk_alloca(route->dst_net.len);
- memset(half.dst_net.ptr, 0, half.dst_net.len);
- half.src_ip = route->src_ip;
- half.gateway = route->gateway;
- half.if_index = route->if_index;
- half.prefixlen = 1;
-
- status = manage_srcroute(this, nlmsg_type, flags, &half);
- half.dst_net.ptr[0] |= 0x80;
- status = manage_srcroute(this, nlmsg_type, flags, &half);
- return status;
- }
-
- memset(&request, 0, sizeof(request));
-
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags;
- hdr->nlmsg_type = nlmsg_type;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
-
- msg = (struct rtmsg*)NLMSG_DATA(hdr);
- msg->rtm_family = route->src_ip->get_family(route->src_ip);
- msg->rtm_dst_len = route->prefixlen;
- msg->rtm_table = this->routing_table;
- msg->rtm_protocol = RTPROT_STATIC;
- msg->rtm_type = RTN_UNICAST;
- msg->rtm_scope = RT_SCOPE_UNIVERSE;
-
- add_attribute(hdr, RTA_DST, route->dst_net, sizeof(request));
- chunk = route->src_ip->get_address(route->src_ip);
- add_attribute(hdr, RTA_PREFSRC, chunk, sizeof(request));
- chunk = route->gateway->get_address(route->gateway);
- add_attribute(hdr, RTA_GATEWAY, chunk, sizeof(request));
- chunk.ptr = (char*)&route->if_index;
- chunk.len = sizeof(route->if_index);
- add_attribute(hdr, RTA_OIF, chunk, sizeof(request));
-
- return netlink_send_ack(this, this->socket_rt, hdr);
+ return this->ipsec->del_policy(this->ipsec, src_ts, dst_ts, direction);
}
/**
- * create or delete an rule to use our routing table
+ * Implementation of kernel_interface_t.get_source_addr
*/
-static status_t manage_rule(private_kernel_interface_t *this, int nlmsg_type,
- u_int32_t table, u_int32_t prio)
+static host_t *get_source_addr(private_kernel_interface_t *this,
+ host_t *dest, host_t *src)
{
- unsigned char request[BUFFER_SIZE];
- struct nlmsghdr *hdr;
- struct rtmsg *msg;
- chunk_t chunk;
-
- memset(&request, 0, sizeof(request));
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- hdr->nlmsg_type = nlmsg_type;
- if (nlmsg_type == RTM_NEWRULE)
- {
- hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL;
- }
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
-
- msg = (struct rtmsg*)NLMSG_DATA(hdr);
- msg->rtm_table = table;
- msg->rtm_family = AF_INET;
- msg->rtm_protocol = RTPROT_BOOT;
- msg->rtm_scope = RT_SCOPE_UNIVERSE;
- msg->rtm_type = RTN_UNICAST;
-
- chunk = chunk_from_thing(prio);
- add_attribute(hdr, RTA_PRIORITY, chunk, sizeof(request));
-
- return netlink_send_ack(this, this->socket_rt, hdr);
+ return this->net->get_source_addr(this->net, dest, src);
}
/**
- * check if an address (chunk) addr is in subnet (net with net_len net bits)
+ * Implementation of kernel_interface_t.get_nexthop
*/
-static bool addr_in_subnet(chunk_t addr, chunk_t net, int net_len)
+static host_t *get_nexthop(private_kernel_interface_t *this, host_t *dest)
{
- int bit, byte;
-
- if (addr.len != net.len)
- {
- return FALSE;
- }
- /* scan through all bits, beginning in the front */
- for (byte = 0; byte < addr.len; byte++)
- {
- for (bit = 7; bit >= 0; bit--)
- {
- /* check if bits are equal (or we reached the end of the net) */
- if (bit + byte * 8 > net_len)
- {
- return TRUE;
- }
- if (((1<<bit) & addr.ptr[byte]) != ((1<<bit) & net.ptr[byte]))
- {
- return FALSE;
- }
- }
- }
- return TRUE;
+ return this->net->get_nexthop(this->net, dest);
}
/**
- * Get a route: If "nexthop", the nexthop is returned. source addr otherwise.
+ * Implementation of kernel_interface_t.get_interface
*/
-static host_t *get_route(private_kernel_interface_t *this, host_t *dest,
- bool nexthop)
+static char* get_interface(private_kernel_interface_t *this, host_t *host)
{
- unsigned char request[BUFFER_SIZE];
- struct nlmsghdr *hdr, *out, *current;
- struct rtmsg *msg;
- chunk_t chunk;
- size_t len;
- int best = -1;
- host_t *src = NULL, *gtw = NULL;
-
- DBG2(DBG_KNL, "getting address to reach %H", dest);
-
- memset(&request, 0, sizeof(request));
-
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP | NLM_F_ROOT;
- hdr->nlmsg_type = RTM_GETROUTE;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
-
- msg = (struct rtmsg*)NLMSG_DATA(hdr);
- msg->rtm_family = dest->get_family(dest);
-
- chunk = dest->get_address(dest);
- add_attribute(hdr, RTA_DST, chunk, sizeof(request));
-
- if (netlink_send(this, this->socket_rt, hdr, &out, &len) != SUCCESS)
- {
- DBG1(DBG_KNL, "getting address to %H failed", dest);
- return NULL;
- }
- current = out;
- while (NLMSG_OK(current, len))
- {
- switch (current->nlmsg_type)
- {
- case NLMSG_DONE:
- break;
- case RTM_NEWROUTE:
- {
- struct rtattr *rta;
- size_t rtasize;
- chunk_t rta_gtw, rta_src, rta_dst;
- u_int32_t rta_oif = 0;
-
- rta_gtw = rta_src = rta_dst = chunk_empty;
- msg = (struct rtmsg*)(NLMSG_DATA(current));
- rta = RTM_RTA(msg);
- rtasize = RTM_PAYLOAD(current);
- while (RTA_OK(rta, rtasize))
- {
- switch (rta->rta_type)
- {
- case RTA_PREFSRC:
- rta_src = chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta));
- break;
- case RTA_GATEWAY:
- rta_gtw = chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta));
- break;
- case RTA_DST:
- rta_dst = chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta));
- break;
- case RTA_OIF:
- if (RTA_PAYLOAD(rta) == sizeof(rta_oif))
- {
- rta_oif = *(u_int32_t*)RTA_DATA(rta);
- }
- break;
- }
- rta = RTA_NEXT(rta, rtasize);
- }
-
- /* apply the route if:
- * - it is not from our own ipsec routing table
- * - is better than a previous one
- * - is the default route or
- * - its destination net contains our destination
- */
- if ((this->routing_table == 0 ||msg->rtm_table != this->routing_table)
- && msg->rtm_dst_len > best
- && (msg->rtm_dst_len == 0 || /* default route */
- (rta_dst.ptr && addr_in_subnet(chunk, rta_dst, msg->rtm_dst_len))))
- {
- iterator_t *ifaces, *addrs;
- iface_entry_t *iface;
- addr_entry_t *addr;
-
- best = msg->rtm_dst_len;
- if (nexthop)
- {
- DESTROY_IF(gtw);
- gtw = host_create_from_chunk(msg->rtm_family, rta_gtw, 0);
- }
- else if (rta_src.ptr)
- {
- DESTROY_IF(src);
- src = host_create_from_chunk(msg->rtm_family, rta_src, 0);
- if (get_vip_refcount(this, src))
- { /* skip source address if it is installed by us */
- DESTROY_IF(src);
- src = NULL;
- current = NLMSG_NEXT(current, len);
- continue;
- }
- }
- else
- {
- /* no source addr, get one from the interfaces */
- ifaces = this->ifaces->create_iterator_locked(
- this->ifaces, &this->mutex);
- while (ifaces->iterate(ifaces, (void**)&iface))
- {
- if (iface->ifindex == rta_oif)
- {
- addrs = iface->addrs->create_iterator(
- iface->addrs, TRUE);
- while (addrs->iterate(addrs, (void**)&addr))
- {
- chunk_t ip = addr->ip->get_address(addr->ip);
- if (msg->rtm_dst_len == 0
- || addr_in_subnet(ip, rta_dst, msg->rtm_dst_len))
- {
- DESTROY_IF(src);
- src = addr->ip->clone(addr->ip);
- break;
- }
- }
- addrs->destroy(addrs);
- }
- }
- ifaces->destroy(ifaces);
- }
- }
- /* FALL through */
- }
- default:
- current = NLMSG_NEXT(current, len);
- continue;
- }
- break;
- }
- free(out);
-
- if (nexthop)
- {
- if (gtw)
- {
- return gtw;
- }
- return dest->clone(dest);
- }
- return src;
+ return this->net->get_interface(this->net, host);
}
/**
- * Implementation of kernel_interface_t.get_source_addr.
+ * Implementation of kernel_interface_t.create_address_enumerator
*/
-static host_t* get_source_addr(private_kernel_interface_t *this, host_t *dest)
+static enumerator_t *create_address_enumerator(private_kernel_interface_t *this,
+ bool include_down_ifaces, bool include_virtual_ips)
{
- return get_route(this, dest, FALSE);
+ return this->net->create_address_enumerator(this->net, include_down_ifaces,
+ include_virtual_ips);
}
/**
- * Implementation of kernel_interface_t.add_ip.
+ * Implementation of kernel_interface_t.add_ip
*/
-static status_t add_ip(private_kernel_interface_t *this,
- host_t *virtual_ip, host_t *iface_ip)
+static status_t add_ip(private_kernel_interface_t *this, host_t *virtual_ip,
+ host_t *iface_ip)
{
- iface_entry_t *iface;
- addr_entry_t *addr;
- iterator_t *addrs, *ifaces;
- int ifindex;
-
- DBG2(DBG_KNL, "adding virtual IP %H", virtual_ip);
-
- ifaces = this->ifaces->create_iterator_locked(this->ifaces, &this->mutex);
- while (ifaces->iterate(ifaces, (void**)&iface))
- {
- bool iface_found = FALSE;
-
- addrs = iface->addrs->create_iterator(iface->addrs, TRUE);
- while (addrs->iterate(addrs, (void**)&addr))
- {
- if (iface_ip->ip_equals(iface_ip, addr->ip))
- {
- iface_found = TRUE;
- }
- else if (virtual_ip->ip_equals(virtual_ip, addr->ip))
- {
- addr->refcount++;
- DBG2(DBG_KNL, "virtual IP %H already installed on %s",
- virtual_ip, iface->ifname);
- addrs->destroy(addrs);
- ifaces->destroy(ifaces);
- return SUCCESS;
- }
- }
- addrs->destroy(addrs);
-
- if (iface_found)
- {
- ifindex = iface->ifindex;
- addr = malloc_thing(addr_entry_t);
- addr->ip = virtual_ip->clone(virtual_ip);
- addr->refcount = 0;
- addr->virtual = TRUE;
- addr->scope = RT_SCOPE_UNIVERSE;
- iface->addrs->insert_last(iface->addrs, addr);
-
- if (manage_ipaddr(this, RTM_NEWADDR, NLM_F_CREATE | NLM_F_EXCL,
- ifindex, virtual_ip) == SUCCESS)
- {
- while (get_vip_refcount(this, virtual_ip) == 0)
- { /* wait until address appears */
- pthread_cond_wait(&this->cond, &this->mutex);
- }
- ifaces->destroy(ifaces);
- return SUCCESS;
- }
- ifaces->destroy(ifaces);
- DBG1(DBG_KNL, "adding virtual IP %H failed", virtual_ip);
- return FAILED;
- }
- }
- ifaces->destroy(ifaces);
-
- DBG1(DBG_KNL, "interface address %H not found, unable to install"
- "virtual IP %H", iface_ip, virtual_ip);
- return FAILED;
+ return this->net->add_ip(this->net, virtual_ip, iface_ip);
}
/**
- * Implementation of kernel_interface_t.del_ip.
+ * Implementation of kernel_interface_t.del_ip
*/
static status_t del_ip(private_kernel_interface_t *this, host_t *virtual_ip)
{
- iface_entry_t *iface;
- addr_entry_t *addr;
- iterator_t *addrs, *ifaces;
- status_t status;
- int ifindex;
-
- DBG2(DBG_KNL, "deleting virtual IP %H", virtual_ip);
-
- ifaces = this->ifaces->create_iterator_locked(this->ifaces, &this->mutex);
- while (ifaces->iterate(ifaces, (void**)&iface))
- {
- addrs = iface->addrs->create_iterator(iface->addrs, TRUE);
- while (addrs->iterate(addrs, (void**)&addr))
- {
- if (virtual_ip->ip_equals(virtual_ip, addr->ip))
- {
- ifindex = iface->ifindex;
- if (addr->refcount == 1)
- {
- status = manage_ipaddr(this, RTM_DELADDR, 0,
- ifindex, virtual_ip);
- if (status == SUCCESS)
- { /* wait until the address is really gone */
- while (get_vip_refcount(this, virtual_ip) > 0)
- {
- pthread_cond_wait(&this->cond, &this->mutex);
- }
- }
- addrs->destroy(addrs);
- ifaces->destroy(ifaces);
- return status;
- }
- else
- {
- addr->refcount--;
- }
- DBG2(DBG_KNL, "virtual IP %H used by other SAs, not deleting",
- virtual_ip);
- addrs->destroy(addrs);
- ifaces->destroy(ifaces);
- return SUCCESS;
- }
- }
- addrs->destroy(addrs);
- }
- ifaces->destroy(ifaces);
-
- DBG2(DBG_KNL, "virtual IP %H not cached, unable to delete", virtual_ip);
- return FAILED;
+ return this->net->del_ip(this->net, virtual_ip);
}
/**
- * Get an SPI for a specific protocol from the kernel.
+ * Implementation of kernel_interface_t.add_route
*/
-static status_t get_spi_internal(private_kernel_interface_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)
+static status_t add_route(private_kernel_interface_t *this, chunk_t dst_net,
+ u_int8_t prefixlen, host_t *gateway, host_t *src_ip, char *if_name)
{
- unsigned char request[BUFFER_SIZE];
- struct nlmsghdr *hdr, *out;
- struct xfrm_userspi_info *userspi;
- u_int32_t received_spi = 0;
- size_t len;
-
- memset(&request, 0, sizeof(request));
-
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST;
- hdr->nlmsg_type = XFRM_MSG_ALLOCSPI;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userspi_info));
-
- userspi = (struct xfrm_userspi_info*)NLMSG_DATA(hdr);
- host2xfrm(src, &userspi->info.saddr);
- host2xfrm(dst, &userspi->info.id.daddr);
- userspi->info.id.proto = proto;
- userspi->info.mode = TRUE; /* tunnel mode */
- userspi->info.reqid = reqid;
- userspi->info.family = src->get_family(src);
- userspi->min = min;
- userspi->max = max;
-
- if (netlink_send(this, this->socket_xfrm, hdr, &out, &len) == SUCCESS)
- {
- hdr = out;
- while (NLMSG_OK(hdr, len))
- {
- switch (hdr->nlmsg_type)
- {
- case XFRM_MSG_NEWSA:
- {
- struct xfrm_usersa_info* usersa = NLMSG_DATA(hdr);
- received_spi = usersa->id.spi;
- break;
- }
- case NLMSG_ERROR:
- {
- struct nlmsgerr *err = NLMSG_DATA(hdr);
-
- DBG1(DBG_KNL, "allocating SPI failed: %s (%d)",
- strerror(-err->error), -err->error);
- break;
- }
- default:
- hdr = NLMSG_NEXT(hdr, len);
- continue;
- case NLMSG_DONE:
- break;
- }
- break;
- }
- free(out);
- }
-
- if (received_spi == 0)
- {
- return FAILED;
- }
-
- *spi = received_spi;
- return SUCCESS;
+ return this->net->add_route(this->net, dst_net, prefixlen, gateway, src_ip,
+ if_name);
}
/**
- * Implementation of kernel_interface_t.get_spi.
+ * Implementation of kernel_interface_t.del_route
*/
-static status_t get_spi(private_kernel_interface_t *this,
- host_t *src, host_t *dst,
- protocol_id_t protocol, u_int32_t reqid,
- u_int32_t *spi)
+static status_t del_route(private_kernel_interface_t *this, chunk_t dst_net,
+ u_int8_t prefixlen, host_t *gateway, host_t *src_ip, char *if_name)
{
- DBG2(DBG_KNL, "getting SPI for reqid %d", reqid);
-
- if (get_spi_internal(this, src, dst,
- (protocol == PROTO_ESP) ? KERNEL_ESP : KERNEL_AH,
- 0xc0000000, 0xcFFFFFFF, reqid, spi) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to get SPI for reqid %d", reqid);
- return FAILED;
- }
-
- DBG2(DBG_KNL, "got SPI 0x%x for reqid %d", *spi, reqid);
-
- return SUCCESS;
-}
-
-/**
- * Implementation of kernel_interface_t.get_cpi.
- */
-static status_t get_cpi(private_kernel_interface_t *this,
- host_t *src, host_t *dst,
- u_int32_t reqid, u_int16_t *cpi)
-{
- u_int32_t received_spi = 0;
- DBG2(DBG_KNL, "getting CPI for reqid %d", reqid);
-
- if (get_spi_internal(this, src, dst,
- IPPROTO_COMP, 0x100, 0xEFFF, reqid, &received_spi) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to get CPI for reqid %d", reqid);
- return FAILED;
- }
-
- *cpi = htons((u_int16_t)ntohl(received_spi));
-
- DBG2(DBG_KNL, "got CPI 0x%x for reqid %d", *cpi, reqid);
-
- return SUCCESS;
-}
-
-/**
- * Implementation of kernel_interface_t.add_sa.
- */
-static status_t add_sa(private_kernel_interface_t *this,
- host_t *src, host_t *dst, u_int32_t spi,
- protocol_id_t protocol, u_int32_t reqid,
- u_int64_t expire_soft, u_int64_t expire_hard,
- u_int16_t enc_alg, u_int16_t enc_size,
- u_int16_t int_alg, u_int16_t int_size,
- prf_plus_t *prf_plus, mode_t mode,
- u_int16_t ipcomp, bool encap,
- bool replace)
-{
- unsigned char request[BUFFER_SIZE];
- char *alg_name;
- u_int16_t add_keymat = 32; /* additional 4 octets KEYMAT required for AES-GCM as of RFC4106 8.1. */
- struct nlmsghdr *hdr;
- struct xfrm_usersa_info *sa;
-
- memset(&request, 0, sizeof(request));
-
- DBG2(DBG_KNL, "adding SAD entry with SPI 0x%x and reqid %d", spi, reqid);
-
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- hdr->nlmsg_type = replace ? 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 = (protocol == PROTO_ESP) ? KERNEL_ESP : (protocol == PROTO_AH) ? KERNEL_AH : protocol;
- sa->family = src->get_family(src);
- sa->mode = mode;
- sa->replay_window = (protocol == IPPROTO_COMP) ? 0 : 32;
- sa->reqid = reqid;
- /* we currently do not expire SAs by volume/packet count */
- sa->lft.soft_byte_limit = XFRM_INF;
- sa->lft.hard_byte_limit = XFRM_INF;
- sa->lft.soft_packet_limit = XFRM_INF;
- sa->lft.hard_packet_limit = XFRM_INF;
- /* we use lifetimes since added, not since used */
- sa->lft.soft_add_expires_seconds = expire_soft;
- sa->lft.hard_add_expires_seconds = expire_hard;
- sa->lft.soft_use_expires_seconds = 0;
- sa->lft.hard_use_expires_seconds = 0;
-
- struct rtattr *rthdr = XFRM_RTA(hdr, struct xfrm_usersa_info);
-
- switch (enc_alg)
- {
- case ENCR_UNDEFINED:
- /* no encryption */
- break;
- case ENCR_AES_CCM_ICV8:
- case ENCR_AES_CCM_ICV12:
- case ENCR_AES_CCM_ICV16:
- /* AES-CCM needs only 3 additional octets KEYMAT as of RFC 4309 7.1. */
- add_keymat = 24;
- /* fall-through */
- case ENCR_AES_GCM_ICV8:
- case ENCR_AES_GCM_ICV12:
- case ENCR_AES_GCM_ICV16:
- {
- u_int16_t icv_size = 0;
- rthdr->rta_type = XFRMA_ALG_AEAD;
- alg_name = lookup_algorithm(encryption_algs, enc_alg, &icv_size);
- if (alg_name == NULL)
- {
- DBG1(DBG_KNL, "algorithm %N not supported by kernel!",
- encryption_algorithm_names, enc_alg);
- return FAILED;
- }
- DBG2(DBG_KNL, " using encryption algorithm %N with key size %d",
- encryption_algorithm_names, enc_alg, enc_size);
-
- /* additional KEYMAT required */
- enc_size += add_keymat;
-
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_algo_aead) + enc_size / 8);
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- struct xfrm_algo_aead* algo = (struct xfrm_algo_aead*)RTA_DATA(rthdr);
- algo->alg_key_len = enc_size;
- algo->alg_icv_len = icv_size;
- strcpy(algo->alg_name, alg_name);
- prf_plus->get_bytes(prf_plus, enc_size / 8, algo->alg_key);
-
- rthdr = XFRM_RTA_NEXT(rthdr);
- break;
- }
- default:
- {
- rthdr->rta_type = XFRMA_ALG_CRYPT;
- alg_name = lookup_algorithm(encryption_algs, enc_alg, &enc_size);
- if (alg_name == NULL)
- {
- DBG1(DBG_KNL, "algorithm %N not supported by kernel!",
- encryption_algorithm_names, enc_alg);
- return FAILED;
- }
- DBG2(DBG_KNL, " using encryption algorithm %N with key size %d",
- encryption_algorithm_names, enc_alg, enc_size);
-
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_algo) + enc_size / 8);
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- struct xfrm_algo* algo = (struct xfrm_algo*)RTA_DATA(rthdr);
- algo->alg_key_len = enc_size;
- strcpy(algo->alg_name, alg_name);
- prf_plus->get_bytes(prf_plus, enc_size / 8, algo->alg_key);
-
- rthdr = XFRM_RTA_NEXT(rthdr);
- break;
- }
- }
-
- if (int_alg != AUTH_UNDEFINED)
- {
- rthdr->rta_type = XFRMA_ALG_AUTH;
- alg_name = lookup_algorithm(integrity_algs, int_alg, &int_size);
- if (alg_name == NULL)
- {
- DBG1(DBG_KNL, "algorithm %N not supported by kernel!",
- integrity_algorithm_names, int_alg);
- return FAILED;
- }
- DBG2(DBG_KNL, " using integrity algorithm %N with key size %d",
- integrity_algorithm_names, int_alg, int_size);
-
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_algo) + int_size / 8);
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- struct xfrm_algo* algo = (struct xfrm_algo*)RTA_DATA(rthdr);
- algo->alg_key_len = int_size;
- strcpy(algo->alg_name, alg_name);
- prf_plus->get_bytes(prf_plus, int_size / 8, algo->alg_key);
-
- rthdr = XFRM_RTA_NEXT(rthdr);
- }
-
- if (ipcomp != IPCOMP_NONE)
- {
- rthdr->rta_type = XFRMA_ALG_COMP;
- alg_name = lookup_algorithm(compression_algs, ipcomp, NULL);
- if (alg_name == NULL)
- {
- DBG1(DBG_KNL, "algorithm %N not supported by kernel!",
- ipcomp_transform_names, ipcomp);
- return FAILED;
- }
- DBG2(DBG_KNL, " using compression algorithm %N",
- ipcomp_transform_names, ipcomp);
-
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_algo));
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- struct xfrm_algo* algo = (struct xfrm_algo*)RTA_DATA(rthdr);
- algo->alg_key_len = 0;
- strcpy(algo->alg_name, alg_name);
-
- rthdr = XFRM_RTA_NEXT(rthdr);
- }
-
- if (encap)
- {
- rthdr->rta_type = XFRMA_ENCAP;
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_encap_tmpl));
-
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- struct xfrm_encap_tmpl* tmpl = (struct xfrm_encap_tmpl*)RTA_DATA(rthdr);
- tmpl->encap_type = UDP_ENCAP_ESPINUDP;
- tmpl->encap_sport = htons(src->get_port(src));
- tmpl->encap_dport = htons(dst->get_port(dst));
- memset(&tmpl->encap_oa, 0, sizeof (xfrm_address_t));
- /* encap_oa could probably be derived from the
- * traffic selectors [rfc4306, p39]. In the netlink kernel implementation
- * pluto does the same as we do here but it uses encap_oa in the
- * pfkey implementation. BUT as /usr/src/linux/net/key/af_key.c indicates
- * the kernel ignores it anyway
- * -> does that mean that NAT-T encap doesn't work in transport mode?
- * No. The reason the kernel ignores NAT-OA is that it recomputes
- * (or, rather, just ignores) the checksum. If packets pass
- * the IPsec checks it marks them "checksum ok" so OA isn't needed. */
- rthdr = XFRM_RTA_NEXT(rthdr);
- }
-
- if (netlink_send_ack(this, this->socket_xfrm, hdr) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to add SAD entry with SPI 0x%x", spi);
- return FAILED;
- }
- return SUCCESS;
+ return this->net->del_route(this->net, dst_net, prefixlen, gateway, src_ip,
+ if_name);
}
-/**
- * Get the replay state (i.e. sequence numbers) of an SA.
- */
-static status_t get_replay_state(private_kernel_interface_t *this,
- u_int32_t spi, protocol_id_t protocol, host_t *dst,
- struct xfrm_replay_state *replay)
-{
- unsigned char request[BUFFER_SIZE];
- struct nlmsghdr *hdr, *out = NULL;
- struct xfrm_aevent_id *out_aevent = NULL, *aevent_id;
- size_t len;
- struct rtattr *rta;
- size_t rtasize;
-
- memset(&request, 0, sizeof(request));
-
- DBG2(DBG_KNL, "querying replay state from SAD entry with SPI 0x%x", spi);
-
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST;
- hdr->nlmsg_type = XFRM_MSG_GETAE;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
-
- aevent_id = (struct xfrm_aevent_id*)NLMSG_DATA(hdr);
- aevent_id->flags = XFRM_AE_RVAL;
-
- host2xfrm(dst, &aevent_id->sa_id.daddr);
- aevent_id->sa_id.spi = spi;
- aevent_id->sa_id.proto = (protocol == PROTO_ESP) ? KERNEL_ESP : (protocol == PROTO_AH) ? KERNEL_AH : protocol;
- aevent_id->sa_id.family = dst->get_family(dst);
-
- if (netlink_send(this, this->socket_xfrm, hdr, &out, &len) == SUCCESS)
- {
- hdr = out;
- while (NLMSG_OK(hdr, len))
- {
- switch (hdr->nlmsg_type)
- {
- case XFRM_MSG_NEWAE:
- {
- out_aevent = NLMSG_DATA(hdr);
- break;
- }
- case NLMSG_ERROR:
- {
- struct nlmsgerr *err = NLMSG_DATA(hdr);
- DBG1(DBG_KNL, "querying replay state from SAD entry failed: %s (%d)",
- strerror(-err->error), -err->error);
- break;
- }
- default:
- hdr = NLMSG_NEXT(hdr, len);
- continue;
- case NLMSG_DONE:
- break;
- }
- break;
- }
- }
-
- if (out_aevent == NULL)
- {
- DBG1(DBG_KNL, "unable to query replay state from SAD entry with SPI 0x%x", spi);
- free(out);
- return FAILED;
- }
-
- rta = XFRM_RTA(out, struct xfrm_aevent_id);
- rtasize = XFRM_PAYLOAD(out, struct xfrm_aevent_id);
- while(RTA_OK(rta, rtasize))
- {
- if (rta->rta_type == XFRMA_REPLAY_VAL)
- {
- memcpy(replay, RTA_DATA(rta), rta->rta_len);
- free(out);
- return SUCCESS;
- }
- rta = RTA_NEXT(rta, rtasize);
- }
-
- DBG1(DBG_KNL, "unable to query replay state from SAD entry with SPI 0x%x", spi);
- free(out);
- return FAILED;
-}
/**
- * Implementation of kernel_interface_t.update_sa.
+ * Implementation of kernel_interface_t.add_ipsec_interface.
*/
-static status_t update_sa(private_kernel_interface_t *this,
- u_int32_t spi, protocol_id_t protocol,
- host_t *src, host_t *dst,
- host_t *new_src, host_t *new_dst, bool encap)
+static void add_ipsec_interface(private_kernel_interface_t *this,
+ kernel_ipsec_constructor_t *create)
{
- unsigned char request[BUFFER_SIZE], *pos;
- struct nlmsghdr *hdr, *out = NULL;
- struct xfrm_usersa_id *sa_id;
- struct xfrm_usersa_info *out_sa = NULL, *sa;
- size_t len;
- struct rtattr *rta;
- size_t rtasize;
- struct xfrm_encap_tmpl* tmpl = NULL;
- bool got_replay_state;
- struct xfrm_replay_state replay;
-
- memset(&request, 0, sizeof(request));
-
- DBG2(DBG_KNL, "querying SAD entry with SPI 0x%x for update", spi);
-
- /* query the exisiting SA first */
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST;
- hdr->nlmsg_type = XFRM_MSG_GETSA;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_id));
-
- sa_id = (struct xfrm_usersa_id*)NLMSG_DATA(hdr);
- host2xfrm(dst, &sa_id->daddr);
- sa_id->spi = spi;
- sa_id->proto = (protocol == PROTO_ESP) ? KERNEL_ESP : (protocol == PROTO_AH) ? KERNEL_AH : protocol;
- sa_id->family = dst->get_family(dst);
-
- if (netlink_send(this, this->socket_xfrm, hdr, &out, &len) == SUCCESS)
- {
- hdr = out;
- while (NLMSG_OK(hdr, len))
- {
- switch (hdr->nlmsg_type)
- {
- case XFRM_MSG_NEWSA:
- {
- out_sa = NLMSG_DATA(hdr);
- break;
- }
- case NLMSG_ERROR:
- {
- struct nlmsgerr *err = NLMSG_DATA(hdr);
- DBG1(DBG_KNL, "querying SAD entry failed: %s (%d)",
- strerror(-err->error), -err->error);
- break;
- }
- default:
- hdr = NLMSG_NEXT(hdr, len);
- continue;
- case NLMSG_DONE:
- break;
- }
- break;
- }
- }
- if (out_sa == NULL)
- {
- DBG1(DBG_KNL, "unable to update SAD entry with SPI 0x%x", spi);
- free(out);
- return FAILED;
- }
-
- /* try to get the replay state */
- got_replay_state = (get_replay_state(
- this, spi, protocol, dst, &replay) == SUCCESS);
-
- /* delete the old SA */
- if (this->public.del_sa(&this->public, dst, spi, protocol) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to delete old SAD entry with SPI 0x%x", spi);
- free(out);
- return FAILED;
- }
-
- DBG2(DBG_KNL, "updating SAD entry with SPI 0x%x from %#H..%#H to %#H..%#H",
- spi, src, dst, new_src, new_dst);
-
- /* copy over the SA from out to request */
- hdr = (struct nlmsghdr*)request;
- memcpy(hdr, out, min(out->nlmsg_len, sizeof(request)));
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- hdr->nlmsg_type = XFRM_MSG_NEWSA;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_info));
- sa = NLMSG_DATA(hdr);
- sa->family = new_dst->get_family(new_dst);
-
- if (!src->ip_equals(src, new_src))
- {
- host2xfrm(new_src, &sa->saddr);
- }
- if (!dst->ip_equals(dst, new_dst))
- {
- host2xfrm(new_dst, &sa->id.daddr);
- }
-
- rta = XFRM_RTA(out, struct xfrm_usersa_info);
- rtasize = XFRM_PAYLOAD(out, struct xfrm_usersa_info);
- pos = (u_char*)XFRM_RTA(hdr, struct xfrm_usersa_info);
- while(RTA_OK(rta, rtasize))
- {
- /* copy all attributes, but not XFRMA_ENCAP if we are disabling it */
- if (rta->rta_type != XFRMA_ENCAP || encap)
- {
- if (rta->rta_type == XFRMA_ENCAP)
- { /* update encap tmpl */
- tmpl = (struct xfrm_encap_tmpl*)RTA_DATA(rta);
- tmpl->encap_sport = ntohs(new_src->get_port(new_src));
- tmpl->encap_dport = ntohs(new_dst->get_port(new_dst));
- }
- memcpy(pos, rta, rta->rta_len);
- pos += RTA_ALIGN(rta->rta_len);
- hdr->nlmsg_len += RTA_ALIGN(rta->rta_len);
- }
- rta = RTA_NEXT(rta, rtasize);
- }
-
- rta = (struct rtattr*)pos;
- if (tmpl == NULL && encap)
- { /* add tmpl if we are enabling it */
- rta->rta_type = XFRMA_ENCAP;
- rta->rta_len = RTA_LENGTH(sizeof(struct xfrm_encap_tmpl));
-
- hdr->nlmsg_len += rta->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- tmpl = (struct xfrm_encap_tmpl*)RTA_DATA(rta);
- tmpl->encap_type = UDP_ENCAP_ESPINUDP;
- tmpl->encap_sport = ntohs(new_src->get_port(new_src));
- tmpl->encap_dport = ntohs(new_dst->get_port(new_dst));
- memset(&tmpl->encap_oa, 0, sizeof (xfrm_address_t));
-
- rta = XFRM_RTA_NEXT(rta);
- }
-
- if (got_replay_state)
- { /* copy the replay data if available */
- rta->rta_type = XFRMA_REPLAY_VAL;
- rta->rta_len = RTA_LENGTH(sizeof(struct xfrm_replay_state));
-
- hdr->nlmsg_len += rta->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
- memcpy(RTA_DATA(rta), &replay, sizeof(replay));
-
- rta = XFRM_RTA_NEXT(rta);
- }
-
- if (netlink_send_ack(this, this->socket_xfrm, hdr) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to update SAD entry with SPI 0x%x", spi);
- free(out);
- return FAILED;
- }
- free(out);
-
- return SUCCESS;
+ this->mutex->lock(this->mutex);
+ this->ipsec_interfaces->insert_last(this->ipsec_interfaces, create);
+ this->mutex->unlock(this->mutex);
}
/**
- * Implementation of kernel_interface_t.query_sa.
+ * Implementation of kernel_interface_t.remove_ipsec_interface.
*/
-static status_t query_sa(private_kernel_interface_t *this, host_t *dst,
- u_int32_t spi, protocol_id_t protocol,
- u_int32_t *use_time)
+static void remove_ipsec_interface(private_kernel_interface_t *this,
+ kernel_ipsec_constructor_t *create)
{
- unsigned char request[BUFFER_SIZE];
- struct nlmsghdr *out = NULL, *hdr;
- struct xfrm_usersa_id *sa_id;
- struct xfrm_usersa_info *sa = NULL;
- size_t len;
-
- DBG2(DBG_KNL, "querying SAD entry with SPI 0x%x", spi);
- memset(&request, 0, sizeof(request));
-
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST;
- hdr->nlmsg_type = XFRM_MSG_GETSA;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_info));
-
- sa_id = (struct xfrm_usersa_id*)NLMSG_DATA(hdr);
- host2xfrm(dst, &sa_id->daddr);
- sa_id->spi = spi;
- sa_id->proto = (protocol == PROTO_ESP) ? KERNEL_ESP : (protocol == PROTO_AH) ? KERNEL_AH : protocol;
- sa_id->family = dst->get_family(dst);
-
- if (netlink_send(this, this->socket_xfrm, hdr, &out, &len) == SUCCESS)
- {
- hdr = out;
- while (NLMSG_OK(hdr, len))
- {
- switch (hdr->nlmsg_type)
- {
- case XFRM_MSG_NEWSA:
- {
- sa = NLMSG_DATA(hdr);
- break;
- }
- case NLMSG_ERROR:
- {
- struct nlmsgerr *err = NLMSG_DATA(hdr);
- DBG1(DBG_KNL, "querying SAD entry failed: %s (%d)",
- strerror(-err->error), -err->error);
- break;
- }
- default:
- hdr = NLMSG_NEXT(hdr, len);
- continue;
- case NLMSG_DONE:
- break;
- }
- break;
- }
- }
-
- if (sa == NULL)
- {
- DBG1(DBG_KNL, "unable to query SAD entry with SPI 0x%x", spi);
- free(out);
- return FAILED;
- }
-
- *use_time = sa->curlft.use_time;
- free (out);
- return SUCCESS;
+ this->mutex->lock(this->mutex);
+ this->ipsec_interfaces->remove(this->ipsec_interfaces, create, NULL);
+ this->mutex->unlock(this->mutex);
}
/**
- * Implementation of kernel_interface_t.del_sa.
+ * Implementation of kernel_interface_t.add_ipsec_interface.
*/
-static status_t del_sa(private_kernel_interface_t *this, host_t *dst,
- u_int32_t spi, protocol_id_t protocol)
+static void add_net_interface(private_kernel_interface_t *this,
+ kernel_net_constructor_t *create)
{
- unsigned char request[BUFFER_SIZE];
- struct nlmsghdr *hdr;
- struct xfrm_usersa_id *sa_id;
-
- memset(&request, 0, sizeof(request));
-
- DBG2(DBG_KNL, "deleting SAD entry with SPI 0x%x", spi);
-
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- hdr->nlmsg_type = XFRM_MSG_DELSA;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_id));
-
- sa_id = (struct xfrm_usersa_id*)NLMSG_DATA(hdr);
- host2xfrm(dst, &sa_id->daddr);
- sa_id->spi = spi;
- sa_id->proto = (protocol == PROTO_ESP) ? KERNEL_ESP : (protocol == PROTO_AH) ? KERNEL_AH : protocol;
- sa_id->family = dst->get_family(dst);
-
- if (netlink_send_ack(this, this->socket_xfrm, hdr) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to delete SAD entry with SPI 0x%x", spi);
- return FAILED;
- }
- DBG2(DBG_KNL, "deleted SAD entry with SPI 0x%x", spi);
- return SUCCESS;
+ this->mutex->lock(this->mutex);
+ this->net_interfaces->insert_last(this->net_interfaces, create);
+ this->mutex->unlock(this->mutex);
}
/**
- * Implementation of kernel_interface_t.add_policy.
+ * Implementation of kernel_interface_t.remove_ipsec_interface.
*/
-static status_t add_policy(private_kernel_interface_t *this,
- host_t *src, host_t *dst,
- traffic_selector_t *src_ts,
- traffic_selector_t *dst_ts,
- policy_dir_t direction, protocol_id_t protocol,
- u_int32_t reqid, bool high_prio, mode_t mode,
- u_int16_t ipcomp)
+static void remove_net_interface(private_kernel_interface_t *this,
+ kernel_net_constructor_t *create)
{
- iterator_t *iterator;
- policy_entry_t *current, *policy;
- bool found = FALSE;
- unsigned char request[BUFFER_SIZE];
- struct xfrm_userpolicy_info *policy_info;
- struct nlmsghdr *hdr;
-
- /* create a policy */
- policy = malloc_thing(policy_entry_t);
- memset(policy, 0, sizeof(policy_entry_t));
- policy->sel = ts2selector(src_ts, dst_ts);
- policy->direction = direction;
-
- /* find the policy, which matches EXACTLY */
- pthread_mutex_lock(&this->mutex);
- iterator = this->policies->create_iterator(this->policies, TRUE);
- while (iterator->iterate(iterator, (void**)&current))
- {
- if (memcmp(&current->sel, &policy->sel, sizeof(struct xfrm_selector)) == 0 &&
- policy->direction == current->direction)
- {
- /* use existing policy */
- current->refcount++;
- DBG2(DBG_KNL, "policy %R===%R already exists, increasing "
- "refcount", src_ts, dst_ts);
- free(policy);
- policy = current;
- found = TRUE;
- break;
- }
- }
- iterator->destroy(iterator);
- if (!found)
- { /* apply the new one, if we have no such policy */
- this->policies->insert_last(this->policies, policy);
- policy->refcount = 1;
- }
-
- DBG2(DBG_KNL, "adding policy %R===%R", src_ts, dst_ts);
-
- memset(&request, 0, sizeof(request));
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- hdr->nlmsg_type = XFRM_MSG_UPDPOLICY;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userpolicy_info));
-
- policy_info = (struct xfrm_userpolicy_info*)NLMSG_DATA(hdr);
- policy_info->sel = policy->sel;
- policy_info->dir = policy->direction;
- /* calculate priority based on source selector size, small size = high prio */
- policy_info->priority = high_prio ? PRIO_HIGH : PRIO_LOW;
- 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;
- pthread_mutex_unlock(&this->mutex);
-
- /* policies don't expire */
- policy_info->lft.soft_byte_limit = XFRM_INF;
- policy_info->lft.soft_packet_limit = XFRM_INF;
- policy_info->lft.hard_byte_limit = XFRM_INF;
- policy_info->lft.hard_packet_limit = XFRM_INF;
- policy_info->lft.soft_add_expires_seconds = 0;
- policy_info->lft.hard_add_expires_seconds = 0;
- policy_info->lft.soft_use_expires_seconds = 0;
- policy_info->lft.hard_use_expires_seconds = 0;
-
- struct rtattr *rthdr = XFRM_RTA(hdr, struct xfrm_userpolicy_info);
- rthdr->rta_type = XFRMA_TMPL;
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_user_tmpl));
-
- hdr->nlmsg_len += rthdr->rta_len;
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- struct xfrm_user_tmpl *tmpl = (struct xfrm_user_tmpl*)RTA_DATA(rthdr);
-
- if (ipcomp != IPCOMP_NONE)
- {
- tmpl->reqid = reqid;
- tmpl->id.proto = IPPROTO_COMP;
- tmpl->aalgos = tmpl->ealgos = tmpl->calgos = ~0;
- tmpl->mode = mode;
- tmpl->optional = direction != POLICY_OUT;
- tmpl->family = src->get_family(src);
-
- host2xfrm(src, &tmpl->saddr);
- host2xfrm(dst, &tmpl->id.daddr);
-
- /* add an additional xfrm_user_tmpl */
- rthdr->rta_len += RTA_LENGTH(sizeof(struct xfrm_user_tmpl));
- hdr->nlmsg_len += RTA_LENGTH(sizeof(struct xfrm_user_tmpl));
- if (hdr->nlmsg_len > sizeof(request))
- {
- return FAILED;
- }
-
- tmpl++;
- }
-
- tmpl->reqid = reqid;
- tmpl->id.proto = (protocol == PROTO_AH) ? KERNEL_AH : KERNEL_ESP;
- tmpl->aalgos = tmpl->ealgos = tmpl->calgos = ~0;
- tmpl->mode = mode;
- tmpl->family = src->get_family(src);
-
- host2xfrm(src, &tmpl->saddr);
- host2xfrm(dst, &tmpl->id.daddr);
-
- if (netlink_send_ack(this, this->socket_xfrm, hdr) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to add policy %R===%R", src_ts, dst_ts);
- 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 mode
- * - we are not using IPv6 (does not work correctly yet!)
- * - routing is not disabled via strongswan.conf
- */
- if (policy->route == NULL && direction == POLICY_FWD &&
- mode != MODE_TRANSPORT && src->get_family(src) != AF_INET6 &&
- this->install_routes)
- {
- policy->route = malloc_thing(route_entry_t);
- if (get_address_by_ts(this, dst_ts, &policy->route->src_ip) == SUCCESS)
- {
- /* get the nexthop to src (src as we are in POLICY_FWD).*/
- policy->route->gateway = get_route(this, src, TRUE);
- policy->route->if_index = get_interface_index(this, dst);
- policy->route->dst_net = chunk_alloc(policy->sel.family == AF_INET ? 4 : 16);
- memcpy(policy->route->dst_net.ptr, &policy->sel.saddr, policy->route->dst_net.len);
- policy->route->prefixlen = policy->sel.prefixlen_s;
-
- if (manage_srcroute(this, RTM_NEWROUTE, NLM_F_CREATE | NLM_F_EXCL,
- policy->route) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to install source route for %H",
- policy->route->src_ip);
- route_entry_destroy(policy->route);
- policy->route = NULL;
- }
- }
- else
- {
- free(policy->route);
- policy->route = NULL;
- }
- }
-
- return SUCCESS;
+ this->mutex->lock(this->mutex);
+ this->net_interfaces->remove(this->net_interfaces, create, NULL);
+ this->mutex->unlock(this->mutex);
}
/**
- * Implementation of kernel_interface_t.query_policy.
+ * Implementation of kernel_interface_t.create_interfaces.
*/
-static status_t query_policy(private_kernel_interface_t *this,
- traffic_selector_t *src_ts,
- traffic_selector_t *dst_ts,
- policy_dir_t direction, u_int32_t *use_time)
+static void create_interfaces(private_kernel_interface_t *this)
{
- unsigned char request[BUFFER_SIZE];
- struct nlmsghdr *out = NULL, *hdr;
- struct xfrm_userpolicy_id *policy_id;
- struct xfrm_userpolicy_info *policy = NULL;
- size_t len;
+ kernel_ipsec_constructor_t create_ipsec;
+ kernel_net_constructor_t create_net;
- memset(&request, 0, sizeof(request));
-
- DBG2(DBG_KNL, "querying policy %R===%R", src_ts, dst_ts);
-
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST;
- hdr->nlmsg_type = XFRM_MSG_GETPOLICY;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userpolicy_id));
-
- policy_id = (struct xfrm_userpolicy_id*)NLMSG_DATA(hdr);
- policy_id->sel = ts2selector(src_ts, dst_ts);
- policy_id->dir = direction;
-
- if (netlink_send(this, this->socket_xfrm, hdr, &out, &len) == SUCCESS)
+ this->mutex->lock(this->mutex);
+ if (this->ipsec_interfaces->get_first(this->ipsec_interfaces, (void**)&create_ipsec) != SUCCESS)
{
- hdr = out;
- while (NLMSG_OK(hdr, len))
- {
- switch (hdr->nlmsg_type)
- {
- case XFRM_MSG_NEWPOLICY:
- {
- policy = (struct xfrm_userpolicy_info*)NLMSG_DATA(hdr);
- break;
- }
- case NLMSG_ERROR:
- {
- struct nlmsgerr *err = NLMSG_DATA(hdr);
- DBG1(DBG_KNL, "querying policy failed: %s (%d)",
- strerror(-err->error), -err->error);
- break;
- }
- default:
- hdr = NLMSG_NEXT(hdr, len);
- continue;
- case NLMSG_DONE:
- break;
- }
- break;
- }
+ this->mutex->unlock(this->mutex);
+ charon->kill(charon, "no ipsec kernel interface loaded");
}
- if (policy == NULL)
+ if (this->net_interfaces->get_first(this->net_interfaces, (void**)&create_net) != SUCCESS)
{
- DBG2(DBG_KNL, "unable to query policy %R===%R", src_ts, dst_ts);
- free(out);
- return FAILED;
+ this->mutex->unlock(this->mutex);
+ charon->kill(charon, "no network kernel interface loaded");
}
- *use_time = (time_t)policy->curlft.use_time;
+ this->mutex->unlock(this->mutex);
- free(out);
- return SUCCESS;
-}
-
-/**
- * Implementation of kernel_interface_t.del_policy.
- */
-static status_t del_policy(private_kernel_interface_t *this,
- traffic_selector_t *src_ts,
- traffic_selector_t *dst_ts,
- policy_dir_t direction)
-{
- policy_entry_t *current, policy, *to_delete = NULL;
- route_entry_t *route;
- unsigned char request[BUFFER_SIZE];
- struct nlmsghdr *hdr;
- struct xfrm_userpolicy_id *policy_id;
- iterator_t *iterator;
-
- DBG2(DBG_KNL, "deleting policy %R===%R", src_ts, dst_ts);
-
- /* create a policy */
- memset(&policy, 0, sizeof(policy_entry_t));
- policy.sel = ts2selector(src_ts, dst_ts);
- policy.direction = direction;
-
- /* find the policy */
- iterator = this->policies->create_iterator_locked(this->policies, &this->mutex);
- while (iterator->iterate(iterator, (void**)&current))
- {
- if (memcmp(&current->sel, &policy.sel, sizeof(struct xfrm_selector)) == 0 &&
- policy.direction == current->direction)
- {
- 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");
- iterator->destroy(iterator);
- return SUCCESS;
- }
- /* remove if last reference */
- iterator->remove(iterator);
- break;
- }
- }
- iterator->destroy(iterator);
- if (!to_delete)
- {
- DBG1(DBG_KNL, "deleting policy %R===%R failed, not found", src_ts, dst_ts);
- return NOT_FOUND;
- }
-
- memset(&request, 0, sizeof(request));
-
- hdr = (struct nlmsghdr*)request;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- hdr->nlmsg_type = XFRM_MSG_DELPOLICY;
- hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userpolicy_id));
-
- policy_id = (struct xfrm_userpolicy_id*)NLMSG_DATA(hdr);
- policy_id->sel = to_delete->sel;
- policy_id->dir = direction;
-
- route = to_delete->route;
- free(to_delete);
-
- if (netlink_send_ack(this, this->socket_xfrm, hdr) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to delete policy %R===%R", src_ts, dst_ts);
- return FAILED;
- }
-
- if (route)
- {
- if (manage_srcroute(this, RTM_DELROUTE, 0, route) != SUCCESS)
- {
- DBG1(DBG_KNL, "error uninstalling route installed with "
- "policy %R===%R", src_ts, dst_ts);
- }
- route_entry_destroy(route);
- }
- return SUCCESS;
+ this->ipsec = create_ipsec();
+ this->net = create_net();
}
/**
@@ -2875,132 +305,53 @@ static status_t del_policy(private_kernel_interface_t *this,
*/
static void destroy(private_kernel_interface_t *this)
{
- if (this->routing_table)
- {
- manage_rule(this, RTM_DELRULE, this->routing_table,
- this->routing_table_prio);
- }
-
- this->job->cancel(this->job);
- close(this->socket_xfrm_events);
- close(this->socket_xfrm);
- close(this->socket_rt_events);
- close(this->socket_rt);
- this->policies->destroy(this->policies);
- this->ifaces->destroy_function(this->ifaces, (void*)iface_entry_destroy);
+ DESTROY_IF(this->ipsec);
+ DESTROY_IF(this->net);
+ this->ipsec_interfaces->destroy(this->ipsec_interfaces);
+ this->net_interfaces->destroy(this->net_interfaces);
+ this->mutex->destroy(this->mutex);
free(this);
}
/*
- * Described in header.
+ * Described in header-file
*/
kernel_interface_t *kernel_interface_create()
{
private_kernel_interface_t *this = malloc_thing(private_kernel_interface_t);
- struct sockaddr_nl addr;
- /* public functions */
this->public.get_spi = (status_t(*)(kernel_interface_t*,host_t*,host_t*,protocol_id_t,u_int32_t,u_int32_t*))get_spi;
this->public.get_cpi = (status_t(*)(kernel_interface_t*,host_t*,host_t*,u_int32_t,u_int16_t*))get_cpi;
- this->public.add_sa = (status_t(*)(kernel_interface_t *,host_t*,host_t*,u_int32_t,protocol_id_t,u_int32_t,u_int64_t,u_int64_t,u_int16_t,u_int16_t,u_int16_t,u_int16_t,prf_plus_t*,mode_t,u_int16_t,bool,bool))add_sa;
+ this->public.add_sa = (status_t(*)(kernel_interface_t *,host_t*,host_t*,u_int32_t,protocol_id_t,u_int32_t,u_int64_t,u_int64_t,u_int16_t,u_int16_t,u_int16_t,u_int16_t,prf_plus_t*,ipsec_mode_t,u_int16_t,bool,bool))add_sa;
this->public.update_sa = (status_t(*)(kernel_interface_t*,u_int32_t,protocol_id_t,host_t*,host_t*,host_t*,host_t*,bool))update_sa;
this->public.query_sa = (status_t(*)(kernel_interface_t*,host_t*,u_int32_t,protocol_id_t,u_int32_t*))query_sa;
this->public.del_sa = (status_t(*)(kernel_interface_t*,host_t*,u_int32_t,protocol_id_t))del_sa;
- this->public.add_policy = (status_t(*)(kernel_interface_t*,host_t*,host_t*,traffic_selector_t*,traffic_selector_t*,policy_dir_t,protocol_id_t,u_int32_t,bool,mode_t,u_int16_t))add_policy;
+ this->public.add_policy = (status_t(*)(kernel_interface_t*,host_t*,host_t*,traffic_selector_t*,traffic_selector_t*,policy_dir_t,protocol_id_t,u_int32_t,bool,ipsec_mode_t,u_int16_t))add_policy;
this->public.query_policy = (status_t(*)(kernel_interface_t*,traffic_selector_t*,traffic_selector_t*,policy_dir_t,u_int32_t*))query_policy;
this->public.del_policy = (status_t(*)(kernel_interface_t*,traffic_selector_t*,traffic_selector_t*,policy_dir_t))del_policy;
- this->public.get_interface = (char*(*)(kernel_interface_t*,host_t*))get_interface_name;
- this->public.create_address_iterator = (iterator_t*(*)(kernel_interface_t*))create_address_iterator;
- this->public.get_source_addr = (host_t*(*)(kernel_interface_t*, host_t *dest))get_source_addr;
+
+ this->public.get_source_addr = (host_t*(*)(kernel_interface_t*, host_t *dest, host_t *src))get_source_addr;
+ this->public.get_nexthop = (host_t*(*)(kernel_interface_t*, host_t *dest))get_nexthop;
+ this->public.get_interface = (char*(*)(kernel_interface_t*,host_t*))get_interface;
+ this->public.create_address_enumerator = (enumerator_t*(*)(kernel_interface_t*,bool,bool))create_address_enumerator;
this->public.add_ip = (status_t(*)(kernel_interface_t*,host_t*,host_t*)) add_ip;
this->public.del_ip = (status_t(*)(kernel_interface_t*,host_t*)) del_ip;
- this->public.destroy = (void(*)(kernel_interface_t*)) destroy;
-
- /* private members */
- this->policies = linked_list_create();
- this->ifaces = linked_list_create();
- this->hiter = NULL;
- this->seq = 200;
- pthread_mutex_init(&this->mutex, NULL);
- pthread_mutex_init(&this->nl_mutex, NULL);
- pthread_cond_init(&this->cond, NULL);
- timerclear(&this->last_roam);
- this->install_routes = lib->settings->get_bool(lib->settings,
- "charon.install_routes", TRUE);
- this->routing_table = lib->settings->get_int(lib->settings,
- "charon.routing_table", IPSEC_ROUTING_TABLE);
- this->routing_table_prio = lib->settings->get_int(lib->settings,
- "charon.routing_table_prio", IPSEC_ROUTING_TABLE_PRIO);
- memset(&addr, 0, sizeof(addr));
- addr.nl_family = AF_NETLINK;
-
- /* create and bind RT socket */
- this->socket_rt = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
- if (this->socket_rt <= 0)
- {
- charon->kill(charon, "unable to create RT netlink socket");
- }
- addr.nl_groups = 0;
- if (bind(this->socket_rt, (struct sockaddr*)&addr, sizeof(addr)))
- {
- charon->kill(charon, "unable to bind RT netlink socket");
- }
-
- /* create and bind RT socket for events (address/interface/route changes) */
- this->socket_rt_events = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
- if (this->socket_rt_events <= 0)
- {
- charon->kill(charon, "unable to create RT event socket");
- }
- addr.nl_groups = RTMGRP_IPV4_IFADDR | RTMGRP_IPV6_IFADDR |
- RTMGRP_IPV4_ROUTE | RTMGRP_IPV4_ROUTE | RTMGRP_LINK;
- if (bind(this->socket_rt_events, (struct sockaddr*)&addr, sizeof(addr)))
- {
- charon->kill(charon, "unable to bind RT event socket");
- }
+ this->public.add_route = (status_t(*)(kernel_interface_t*,chunk_t,u_int8_t,host_t*,host_t*,char*)) add_route;
+ this->public.del_route = (status_t(*)(kernel_interface_t*,chunk_t,u_int8_t,host_t*,host_t*,char*)) del_route;
- /* create and bind XFRM socket */
- this->socket_xfrm = socket(AF_NETLINK, SOCK_RAW, NETLINK_XFRM);
- if (this->socket_xfrm <= 0)
- {
- charon->kill(charon, "unable to create XFRM netlink socket");
- }
- addr.nl_groups = 0;
- if (bind(this->socket_xfrm, (struct sockaddr*)&addr, sizeof(addr)))
- {
- charon->kill(charon, "unable to bind XFRM netlink socket");
- }
+ this->public.add_ipsec_interface = (void(*)(kernel_interface_t*, kernel_ipsec_constructor_t))add_ipsec_interface;
+ this->public.remove_ipsec_interface = (void(*)(kernel_interface_t*, kernel_ipsec_constructor_t))remove_ipsec_interface;
+ this->public.add_net_interface = (void(*)(kernel_interface_t*, kernel_net_constructor_t))add_net_interface;
+ this->public.remove_net_interface = (void(*)(kernel_interface_t*, kernel_net_constructor_t))remove_net_interface;
- /* create and bind XFRM socket for ACQUIRE & EXPIRE */
- this->socket_xfrm_events = socket(AF_NETLINK, SOCK_RAW, NETLINK_XFRM);
- if (this->socket_xfrm_events <= 0)
- {
- charon->kill(charon, "unable to create XFRM event socket");
- }
- addr.nl_groups = XFRMGRP_ACQUIRE | XFRMGRP_EXPIRE;
- if (bind(this->socket_xfrm_events, (struct sockaddr*)&addr, sizeof(addr)))
- {
- charon->kill(charon, "unable to bind XFRM event socket");
- }
-
- this->job = callback_job_create((callback_job_cb_t)receive_events,
- this, NULL, NULL);
- charon->processor->queue_job(charon->processor, (job_t*)this->job);
+ this->public.create_interfaces = (void (*)(kernel_interface_t*))create_interfaces;
+ this->public.destroy = (void (*)(kernel_interface_t*))destroy;
- if (init_address_list(this) != SUCCESS)
- {
- charon->kill(charon, "unable to get interface list");
- }
-
- if (this->routing_table)
- {
- if (manage_rule(this, RTM_NEWRULE, this->routing_table,
- this->routing_table_prio) != SUCCESS)
- {
- DBG1(DBG_KNL, "unable to create routing table rule");
- }
- }
+ this->ipsec_interfaces = linked_list_create();
+ this->net_interfaces = linked_list_create();
+ this->mutex = mutex_create(MUTEX_RECURSIVE);
+ this->ipsec = NULL;
+ this->net = NULL;
return &this->public;
}
-