diff options
Diffstat (limited to 'src/charon/plugins/kernel_klips')
| -rw-r--r-- | src/charon/plugins/kernel_klips/Makefile.am | 10 | ||||
| -rw-r--r-- | src/charon/plugins/kernel_klips/Makefile.in | 572 | ||||
| -rw-r--r-- | src/charon/plugins/kernel_klips/kernel_klips_ipsec.c | 2671 | ||||
| -rw-r--r-- | src/charon/plugins/kernel_klips/kernel_klips_ipsec.h | 46 | ||||
| -rw-r--r-- | src/charon/plugins/kernel_klips/kernel_klips_plugin.c | 56 | ||||
| -rw-r--r-- | src/charon/plugins/kernel_klips/kernel_klips_plugin.h | 47 | ||||
| -rw-r--r-- | src/charon/plugins/kernel_klips/pfkeyv2.h | 322 |
7 files changed, 0 insertions, 3724 deletions
diff --git a/src/charon/plugins/kernel_klips/Makefile.am b/src/charon/plugins/kernel_klips/Makefile.am deleted file mode 100644 index a7ae06df1..000000000 --- a/src/charon/plugins/kernel_klips/Makefile.am +++ /dev/null @@ -1,10 +0,0 @@ - -INCLUDES = -I${linux_headers} -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/charon - -AM_CFLAGS = -rdynamic - -plugin_LTLIBRARIES = libstrongswan-kernel-klips.la - -libstrongswan_kernel_klips_la_SOURCES = kernel_klips_plugin.h kernel_klips_plugin.c \ - kernel_klips_ipsec.h kernel_klips_ipsec.c pfkeyv2.h -libstrongswan_kernel_klips_la_LDFLAGS = -module -avoid-version diff --git a/src/charon/plugins/kernel_klips/Makefile.in b/src/charon/plugins/kernel_klips/Makefile.in deleted file mode 100644 index bf194ae16..000000000 --- a/src/charon/plugins/kernel_klips/Makefile.in +++ /dev/null @@ -1,572 +0,0 @@ -# Makefile.in generated by automake 1.11 from Makefile.am. -# @configure_input@ - -# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, -# 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, -# Inc. -# This Makefile.in is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - 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tags uninstall uninstall-am uninstall-pluginLTLIBRARIES - - -# Tell versions [3.59,3.63) of GNU make to not export all variables. -# Otherwise a system limit (for SysV at least) may be exceeded. -.NOEXPORT: diff --git a/src/charon/plugins/kernel_klips/kernel_klips_ipsec.c b/src/charon/plugins/kernel_klips/kernel_klips_ipsec.c deleted file mode 100644 index fea1b83a1..000000000 --- a/src/charon/plugins/kernel_klips/kernel_klips_ipsec.c +++ /dev/null @@ -1,2671 +0,0 @@ -/* - * Copyright (C) 2008 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -#include <sys/types.h> -#include <sys/socket.h> -#include <sys/ioctl.h> -#include <stdint.h> -#include "pfkeyv2.h" -#include <linux/udp.h> -#include <net/if.h> -#include <unistd.h> -#include <stdio.h> -#include <string.h> -#include <time.h> -#include <errno.h> - -#include "kernel_klips_ipsec.h" - -#include <daemon.h> -#include <threading/thread.h> -#include <threading/mutex.h> -#include <processing/jobs/callback_job.h> -#include <processing/jobs/acquire_job.h> -#include <processing/jobs/rekey_child_sa_job.h> -#include <processing/jobs/delete_child_sa_job.h> -#include <processing/jobs/update_sa_job.h> - -/** default timeout for generated SPIs (in seconds) */ -#define SPI_TIMEOUT 30 - -/** buffer size for PF_KEY messages */ -#define PFKEY_BUFFER_SIZE 2048 - -/** PF_KEY messages are 64 bit aligned */ -#define PFKEY_ALIGNMENT 8 -/** aligns len to 64 bits */ -#define PFKEY_ALIGN(len) (((len) + PFKEY_ALIGNMENT - 1) & ~(PFKEY_ALIGNMENT - 1)) -/** calculates the properly padded length in 64 bit chunks */ -#define PFKEY_LEN(len) ((PFKEY_ALIGN(len) / PFKEY_ALIGNMENT)) -/** calculates user mode length i.e. in bytes */ -#define PFKEY_USER_LEN(len) ((len) * PFKEY_ALIGNMENT) - -/** given a PF_KEY message header and an extension this updates the length in the header */ -#define PFKEY_EXT_ADD(msg, ext) ((msg)->sadb_msg_len += ((struct sadb_ext*)ext)->sadb_ext_len) -/** given a PF_KEY message header this returns a pointer to the next extension */ -#define PFKEY_EXT_ADD_NEXT(msg) ((struct sadb_ext*)(((char*)(msg)) + PFKEY_USER_LEN((msg)->sadb_msg_len))) -/** copy an extension and append it to a PF_KEY message */ -#define PFKEY_EXT_COPY(msg, ext) (PFKEY_EXT_ADD(msg, memcpy(PFKEY_EXT_ADD_NEXT(msg), ext, PFKEY_USER_LEN(((struct sadb_ext*)ext)->sadb_ext_len)))) -/** given a PF_KEY extension this returns a pointer to the next extension */ -#define PFKEY_EXT_NEXT(ext) ((struct sadb_ext*)(((char*)(ext)) + PFKEY_USER_LEN(((struct sadb_ext*)ext)->sadb_ext_len))) -/** given a PF_KEY extension this returns a pointer to the next extension also updates len (len in 64 bit words) */ -#define PFKEY_EXT_NEXT_LEN(ext,len) ((len) -= (ext)->sadb_ext_len, PFKEY_EXT_NEXT(ext)) -/** true if ext has a valid length and len is large enough to contain ext (assuming len in 64 bit words) */ -#define PFKEY_EXT_OK(ext,len) ((len) >= PFKEY_LEN(sizeof(struct sadb_ext)) && \ - (ext)->sadb_ext_len >= PFKEY_LEN(sizeof(struct sadb_ext)) && \ - (ext)->sadb_ext_len <= (len)) - -/** special SPI values used for policies in KLIPS */ -#define SPI_PASS 256 -#define SPI_DROP 257 -#define SPI_REJECT 258 -#define SPI_HOLD 259 -#define SPI_TRAP 260 -#define SPI_TRAPSUBNET 261 - -/** the prefix of the name of KLIPS ipsec devices */ -#define IPSEC_DEV_PREFIX "ipsec" -/** this is the default number of ipsec devices */ -#define DEFAULT_IPSEC_DEV_COUNT 4 -/** TRUE if the given name matches an ipsec device */ -#define IS_IPSEC_DEV(name) (strneq((name), IPSEC_DEV_PREFIX, sizeof(IPSEC_DEV_PREFIX) - 1)) - -/** the following stuff is from ipsec_tunnel.h */ -struct ipsectunnelconf -{ - __u32 cf_cmd; - union - { - char cfu_name[12]; - } cf_u; -#define cf_name cf_u.cfu_name -}; - -#define IPSEC_SET_DEV (SIOCDEVPRIVATE) -#define IPSEC_DEL_DEV (SIOCDEVPRIVATE + 1) -#define IPSEC_CLR_DEV (SIOCDEVPRIVATE + 2) - -typedef struct private_kernel_klips_ipsec_t private_kernel_klips_ipsec_t; - -/** - * Private variables and functions of kernel_klips class. - */ -struct private_kernel_klips_ipsec_t -{ - /** - * Public part of the kernel_klips_t object. - */ - kernel_klips_ipsec_t public; - - /** - * mutex to lock access to various lists - */ - mutex_t *mutex; - - /** - * List of installed policies (policy_entry_t) - */ - linked_list_t *policies; - - /** - * List of allocated SPIs without installed SA (sa_entry_t) - */ - linked_list_t *allocated_spis; - - /** - * List of installed SAs (sa_entry_t) - */ - linked_list_t *installed_sas; - - /** - * whether to install routes along policies - */ - bool install_routes; - - /** - * List of ipsec devices (ipsec_dev_t) - */ - linked_list_t *ipsec_devices; - - /** - * job receiving PF_KEY events - */ - callback_job_t *job; - - /** - * mutex to lock access to the PF_KEY socket - */ - mutex_t *mutex_pfkey; - - /** - * PF_KEY socket to communicate with the kernel - */ - int socket; - - /** - * PF_KEY socket to receive acquire and expire events - */ - int socket_events; - - /** - * sequence number for messages sent to the kernel - */ - int seq; - -}; - - -typedef struct ipsec_dev_t ipsec_dev_t; - -/** - * ipsec device - */ -struct ipsec_dev_t { - /** name of the virtual ipsec interface */ - char name[IFNAMSIZ]; - - /** name of the physical interface */ - char phys_name[IFNAMSIZ]; - - /** by how many CHILD_SA's this ipsec device is used */ - u_int refcount; -}; - -/** - * compare the given name with the virtual device name - */ -static inline bool ipsec_dev_match_byname(ipsec_dev_t *current, char *name) -{ - return name && streq(current->name, name); -} - -/** - * compare the given name with the physical device name - */ -static inline bool ipsec_dev_match_byphys(ipsec_dev_t *current, char *name) -{ - return name && streq(current->phys_name, name); -} - -/** - * matches free ipsec devices - */ -static inline bool ipsec_dev_match_free(ipsec_dev_t *current) -{ - return current->refcount == 0; -} - -/** - * tries to find an ipsec_dev_t object by name - */ -static status_t find_ipsec_dev(private_kernel_klips_ipsec_t *this, char *name, - ipsec_dev_t **dev) -{ - linked_list_match_t match = (linked_list_match_t)(IS_IPSEC_DEV(name) ? - ipsec_dev_match_byname : ipsec_dev_match_byphys); - return this->ipsec_devices->find_first(this->ipsec_devices, match, - (void**)dev, name); -} - -/** - * attach an ipsec device to a physical interface - */ -static status_t attach_ipsec_dev(char* name, char *phys_name) -{ - int sock; - struct ifreq req; - struct ipsectunnelconf *itc = (struct ipsectunnelconf*)&req.ifr_data; - short phys_flags; - int mtu; - - DBG2(DBG_KNL, "attaching virtual interface %s to %s", name, phys_name); - - if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) <= 0) - { - return FAILED; - } - - strncpy(req.ifr_name, phys_name, IFNAMSIZ); - if (ioctl(sock, SIOCGIFFLAGS, &req) < 0) - { - close(sock); - return FAILED; - } - phys_flags = req.ifr_flags; - - strncpy(req.ifr_name, name, IFNAMSIZ); - if (ioctl(sock, SIOCGIFFLAGS, &req) < 0) - { - close(sock); - return FAILED; - } - - if (req.ifr_flags & IFF_UP) - { - /* if it's already up, it is already attached, detach it first */ - ioctl(sock, IPSEC_DEL_DEV, &req); - } - - /* attach it */ - strncpy(req.ifr_name, name, IFNAMSIZ); - strncpy(itc->cf_name, phys_name, sizeof(itc->cf_name)); - ioctl(sock, IPSEC_SET_DEV, &req); - - /* copy address from physical to virtual */ - strncpy(req.ifr_name, phys_name, IFNAMSIZ); - if (ioctl(sock, SIOCGIFADDR, &req) == 0) - { - strncpy(req.ifr_name, name, IFNAMSIZ); - ioctl(sock, SIOCSIFADDR, &req); - } - - /* copy net mask from physical to virtual */ - strncpy(req.ifr_name, phys_name, IFNAMSIZ); - if (ioctl(sock, SIOCGIFNETMASK, &req) == 0) - { - strncpy(req.ifr_name, name, IFNAMSIZ); - ioctl(sock, SIOCSIFNETMASK, &req); - } - - /* copy other flags and addresses */ - strncpy(req.ifr_name, name, IFNAMSIZ); - if (ioctl(sock, SIOCGIFFLAGS, &req) == 0) - { - if (phys_flags & IFF_POINTOPOINT) - { - req.ifr_flags |= IFF_POINTOPOINT; - req.ifr_flags &= ~IFF_BROADCAST; - ioctl(sock, SIOCSIFFLAGS, &req); - - strncpy(req.ifr_name, phys_name, IFNAMSIZ); - if (ioctl(sock, SIOCGIFDSTADDR, &req) == 0) - { - strncpy(req.ifr_name, name, IFNAMSIZ); - ioctl(sock, SIOCSIFDSTADDR, &req); - } - } - else if (phys_flags & IFF_BROADCAST) - { - req.ifr_flags &= ~IFF_POINTOPOINT; - req.ifr_flags |= IFF_BROADCAST; - ioctl(sock, SIOCSIFFLAGS, &req); - - strncpy(req.ifr_name, phys_name, IFNAMSIZ); - if (ioctl(sock, SIOCGIFBRDADDR, &req)==0) - { - strncpy(req.ifr_name, name, IFNAMSIZ); - ioctl(sock, SIOCSIFBRDADDR, &req); - } - } - else - { - req.ifr_flags &= ~IFF_POINTOPOINT; - req.ifr_flags &= ~IFF_BROADCAST; - ioctl(sock, SIOCSIFFLAGS, &req); - } - } - - mtu = lib->settings->get_int(lib->settings, - "charon.plugins.kernel-klips.ipsec_dev_mtu", 0); - if (mtu <= 0) - { - /* guess MTU as physical MTU - ESP overhead [- NAT-T overhead] - * ESP overhead : 73 bytes - * NAT-T overhead : 8 bytes ==> 81 bytes - * - * assuming tunnel mode with AES encryption and integrity - * outer IP header : 20 bytes - * (NAT-T UDP header: 8 bytes) - * ESP header : 8 bytes - * IV : 16 bytes - * padding : 15 bytes (worst-case) - * pad len / NH : 2 bytes - * auth data : 12 bytes - */ - strncpy(req.ifr_name, phys_name, IFNAMSIZ); - ioctl(sock, SIOCGIFMTU, &req); - mtu = req.ifr_mtu - 81; - } - - /* set MTU */ - strncpy(req.ifr_name, name, IFNAMSIZ); - req.ifr_mtu = mtu; - ioctl(sock, SIOCSIFMTU, &req); - - /* bring ipsec device UP */ - if (ioctl(sock, SIOCGIFFLAGS, &req) == 0) - { - req.ifr_flags |= IFF_UP; - ioctl(sock, SIOCSIFFLAGS, &req); - } - - close(sock); - return SUCCESS; -} - -/** - * detach an ipsec device from a physical interface - */ -static status_t detach_ipsec_dev(char* name, char *phys_name) -{ - int sock; - struct ifreq req; - - DBG2(DBG_KNL, "detaching virtual interface %s from %s", name, - strlen(phys_name) ? phys_name : "any physical interface"); - - if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) <= 0) - { - return FAILED; - } - - strncpy(req.ifr_name, name, IFNAMSIZ); - if (ioctl(sock, SIOCGIFFLAGS, &req) < 0) - { - close(sock); - return FAILED; - } - - /* shutting interface down */ - if (req.ifr_flags & IFF_UP) - { - req.ifr_flags &= ~IFF_UP; - ioctl(sock, SIOCSIFFLAGS, &req); - } - - /* unset address */ - memset(&req.ifr_addr, 0, sizeof(req.ifr_addr)); - req.ifr_addr.sa_family = AF_INET; - ioctl(sock, SIOCSIFADDR, &req); - - /* detach interface */ - ioctl(sock, IPSEC_DEL_DEV, &req); - - close(sock); - return SUCCESS; -} - -/** - * destroy an ipsec_dev_t object - */ -static void ipsec_dev_destroy(ipsec_dev_t *this) -{ - detach_ipsec_dev(this->name, this->phys_name); - free(this); -} - - -typedef struct route_entry_t route_entry_t; - -/** - * installed routing entry - */ -struct route_entry_t { - /** Name of the interface the route is bound to */ - char *if_name; - - /** Source ip of the route */ - host_t *src_ip; - - /** Gateway for this route */ - host_t *gateway; - - /** Destination net */ - chunk_t dst_net; - - /** Destination net prefixlen */ - u_int8_t prefixlen; -}; - -/** - * destroy an route_entry_t object - */ -static void route_entry_destroy(route_entry_t *this) -{ - free(this->if_name); - this->src_ip->destroy(this->src_ip); - 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 { - - /** reqid of this policy, if setup as trap */ - u_int32_t reqid; - - /** direction of this policy: in, out, forward */ - u_int8_t direction; - - /** parameters of installed policy */ - struct { - /** subnet and port */ - host_t *net; - /** subnet mask */ - u_int8_t mask; - /** protocol */ - u_int8_t proto; - } src, dst; - - /** associated route installed for this policy */ - route_entry_t *route; - - /** by how many CHILD_SA's this policy is actively used */ - u_int activecount; - - /** by how many CHILD_SA's this policy is trapped */ - u_int trapcount; -}; - -/** - * convert a numerical netmask to a host_t - */ -static host_t *mask2host(int family, u_int8_t mask) -{ - static const u_char bitmask[] = { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe }; - chunk_t chunk = chunk_alloca(family == AF_INET ? 4 : 16); - int bytes = mask / 8, bits = mask % 8; - memset(chunk.ptr, 0xFF, bytes); - memset(chunk.ptr + bytes, 0, chunk.len - bytes); - if (bits) - { - chunk.ptr[bytes] = bitmask[bits]; - } - return host_create_from_chunk(family, chunk, 0); -} - -/** - * check if a host is in a subnet (host with netmask in bits) - */ -static bool is_host_in_net(host_t *host, host_t *net, u_int8_t mask) -{ - static const u_char bitmask[] = { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe }; - chunk_t host_chunk, net_chunk; - int bytes = mask / 8, bits = mask % 8; - - host_chunk = host->get_address(host); - net_chunk = net->get_address(net); - - if (host_chunk.len != net_chunk.len) - { - return FALSE; - } - - if (memeq(host_chunk.ptr, net_chunk.ptr, bytes)) - { - return (bits == 0) || - (host_chunk.ptr[bytes] & bitmask[bits]) == - (net_chunk.ptr[bytes] & bitmask[bits]); - } - - return FALSE; -} - -/** - * create a policy_entry_t object - */ -static policy_entry_t *create_policy_entry(traffic_selector_t *src_ts, - traffic_selector_t *dst_ts, policy_dir_t dir) -{ - policy_entry_t *policy = malloc_thing(policy_entry_t); - policy->reqid = 0; - policy->direction = dir; - policy->route = NULL; - policy->activecount = 0; - policy->trapcount = 0; - - src_ts->to_subnet(src_ts, &policy->src.net, &policy->src.mask); - dst_ts->to_subnet(dst_ts, &policy->dst.net, &policy->dst.mask); - - /* src or dest proto may be "any" (0), use more restrictive one */ - policy->src.proto = max(src_ts->get_protocol(src_ts), dst_ts->get_protocol(dst_ts)); - policy->src.proto = policy->src.proto ? policy->src.proto : 0; - policy->dst.proto = policy->src.proto; - - return policy; -} - -/** - * destroy a policy_entry_t object - */ -static void policy_entry_destroy(policy_entry_t *this) -{ - DESTROY_IF(this->src.net); - DESTROY_IF(this->dst.net); - if (this->route) - { - route_entry_destroy(this->route); - } - free(this); -} - -/** - * compares two policy_entry_t - */ -static inline bool policy_entry_equals(policy_entry_t *current, policy_entry_t *policy) -{ - return current->direction == policy->direction && - current->src.proto == policy->src.proto && - current->dst.proto == policy->dst.proto && - current->src.mask == policy->src.mask && - current->dst.mask == policy->dst.mask && - current->src.net->equals(current->src.net, policy->src.net) && - current->dst.net->equals(current->dst.net, policy->dst.net); -} - -static inline bool policy_entry_match_byaddrs(policy_entry_t *current, host_t *src, - host_t *dst) -{ - return is_host_in_net(src, current->src.net, current->src.mask) && - is_host_in_net(dst, current->dst.net, current->dst.mask); -} - -typedef struct sa_entry_t sa_entry_t; - -/** - * used for two things: - * - allocated SPIs that have not yet resulted in an installed SA - * - installed inbound SAs with enabled UDP encapsulation - */ -struct sa_entry_t { - - /** protocol of this SA */ - protocol_id_t protocol; - - /** reqid of this SA */ - u_int32_t reqid; - - /** SPI of this SA */ - u_int32_t spi; - - /** src address of this SA */ - host_t *src; - - /** dst address of this SA */ - host_t *dst; - - /** TRUE if this SA uses UDP encapsulation */ - bool encap; - - /** TRUE if this SA is inbound */ - bool inbound; -}; - -/** - * create an sa_entry_t object - */ -static sa_entry_t *create_sa_entry(protocol_id_t protocol, u_int32_t spi, - u_int32_t reqid, host_t *src, host_t *dst, - bool encap, bool inbound) -{ - sa_entry_t *sa = malloc_thing(sa_entry_t); - sa->protocol = protocol; - sa->reqid = reqid; - sa->spi = spi; - sa->src = src ? src->clone(src) : NULL; - sa->dst = dst ? dst->clone(dst) : NULL; - sa->encap = encap; - sa->inbound = inbound; - return sa; -} - -/** - * destroy an sa_entry_t object - */ -static void sa_entry_destroy(sa_entry_t *this) -{ - DESTROY_IF(this->src); - DESTROY_IF(this->dst); - free(this); -} - -/** - * match an sa_entry_t for an inbound SA that uses UDP encapsulation by spi and src (remote) address - */ -static inline bool sa_entry_match_encapbysrc(sa_entry_t *current, u_int32_t *spi, - host_t *src) -{ - return current->encap && current->inbound && - current->spi == *spi && src->ip_equals(src, current->src); -} - -/** - * match an sa_entry_t by protocol, spi and dst address (as the kernel does it) - */ -static inline bool sa_entry_match_bydst(sa_entry_t *current, protocol_id_t *protocol, - u_int32_t *spi, host_t *dst) -{ - return current->protocol == *protocol && current->spi == *spi && dst->ip_equals(dst, current->dst); -} - -/** - * match an sa_entry_t by protocol, reqid and spi - */ -static inline bool sa_entry_match_byid(sa_entry_t *current, protocol_id_t *protocol, - u_int32_t *spi, u_int32_t *reqid) -{ - return current->protocol == *protocol && current->spi == *spi && current->reqid == *reqid; -} - -typedef struct pfkey_msg_t pfkey_msg_t; - -struct pfkey_msg_t -{ - /** - * PF_KEY message base - */ - struct sadb_msg *msg; - - - /** - * PF_KEY message extensions - */ - union { - struct sadb_ext *ext[SADB_EXT_MAX + 1]; - struct { - struct sadb_ext *reserved; /* SADB_EXT_RESERVED */ - struct sadb_sa *sa; /* SADB_EXT_SA */ - struct sadb_lifetime *lft_current; /* SADB_EXT_LIFETIME_CURRENT */ - struct sadb_lifetime *lft_hard; /* SADB_EXT_LIFETIME_HARD */ - struct sadb_lifetime *lft_soft; /* SADB_EXT_LIFETIME_SOFT */ - struct sadb_address *src; /* SADB_EXT_ADDRESS_SRC */ - struct sadb_address *dst; /* SADB_EXT_ADDRESS_DST */ - struct sadb_address *proxy; /* SADB_EXT_ADDRESS_PROXY */ - struct sadb_key *key_auth; /* SADB_EXT_KEY_AUTH */ - struct sadb_key *key_encr; /* SADB_EXT_KEY_ENCRYPT */ - struct sadb_ident *id_src; /* SADB_EXT_IDENTITY_SRC */ - struct sadb_ident *id_dst; /* SADB_EXT_IDENTITY_DST */ - struct sadb_sens *sensitivity; /* SADB_EXT_SENSITIVITY */ - struct sadb_prop *proposal; /* SADB_EXT_PROPOSAL */ - struct sadb_supported *supported_auth; /* SADB_EXT_SUPPORTED_AUTH */ - struct sadb_supported *supported_encr; /* SADB_EXT_SUPPORTED_ENCRYPT */ - struct sadb_spirange *spirange; /* SADB_EXT_SPIRANGE */ - struct sadb_x_kmprivate *x_kmprivate; /* SADB_X_EXT_KMPRIVATE */ - struct sadb_ext *x_policy; /* SADB_X_EXT_SATYPE2 */ - struct sadb_ext *x_sa2; /* SADB_X_EXT_SA2 */ - struct sadb_address *x_dst2; /* SADB_X_EXT_ADDRESS_DST2 */ - struct sadb_address *x_src_flow; /* SADB_X_EXT_ADDRESS_SRC_FLOW */ - struct sadb_address *x_dst_flow; /* SADB_X_EXT_ADDRESS_DST_FLOW */ - struct sadb_address *x_src_mask; /* SADB_X_EXT_ADDRESS_SRC_MASK */ - struct sadb_address *x_dst_mask; /* SADB_X_EXT_ADDRESS_DST_MASK */ - struct sadb_x_debug *x_debug; /* SADB_X_EXT_DEBUG */ - struct sadb_protocol *x_protocol; /* SADB_X_EXT_PROTOCOL */ - struct sadb_x_nat_t_type *x_natt_type; /* SADB_X_EXT_NAT_T_TYPE */ - struct sadb_x_nat_t_port *x_natt_sport; /* SADB_X_EXT_NAT_T_SPORT */ - struct sadb_x_nat_t_port *x_natt_dport; /* SADB_X_EXT_NAT_T_DPORT */ - struct sadb_address *x_natt_oa; /* SADB_X_EXT_NAT_T_OA */ - } __attribute__((__packed__)); - }; -}; - -/** - * convert a IKEv2 specific protocol identifier to the PF_KEY sa type - */ -static u_int8_t proto_ike2satype(protocol_id_t proto) -{ - switch (proto) - { - case PROTO_ESP: - return SADB_SATYPE_ESP; - case PROTO_AH: - return SADB_SATYPE_AH; - case IPPROTO_COMP: - return SADB_X_SATYPE_COMP; - default: - return proto; - } -} - -/** - * convert a PF_KEY sa type to a IKEv2 specific protocol identifier - */ -static protocol_id_t proto_satype2ike(u_int8_t proto) -{ - switch (proto) - { - case SADB_SATYPE_ESP: - return PROTO_ESP; - case SADB_SATYPE_AH: - return PROTO_AH; - case SADB_X_SATYPE_COMP: - return IPPROTO_COMP; - default: - return proto; - } -} - -typedef struct kernel_algorithm_t kernel_algorithm_t; - -/** - * Mapping of IKEv2 algorithms to PF_KEY algorithms - */ -struct kernel_algorithm_t { - /** - * Identifier specified in IKEv2 - */ - int ikev2; - - /** - * Identifier as defined in pfkeyv2.h - */ - int kernel; -}; - -#define END_OF_LIST -1 - -/** - * Algorithms for encryption - */ -static kernel_algorithm_t encryption_algs[] = { -/* {ENCR_DES_IV64, 0 }, */ - {ENCR_DES, SADB_EALG_DESCBC }, - {ENCR_3DES, SADB_EALG_3DESCBC }, -/* {ENCR_RC5, 0 }, */ -/* {ENCR_IDEA, 0 }, */ -/* {ENCR_CAST, 0 }, */ - {ENCR_BLOWFISH, SADB_EALG_BFCBC }, -/* {ENCR_3IDEA, 0 }, */ -/* {ENCR_DES_IV32, 0 }, */ - {ENCR_NULL, SADB_EALG_NULL }, - {ENCR_AES_CBC, SADB_EALG_AESCBC }, -/* {ENCR_AES_CTR, 0 }, */ -/* {ENCR_AES_CCM_ICV8, 0 }, */ -/* {ENCR_AES_CCM_ICV12, 0 }, */ -/* {ENCR_AES_CCM_ICV16, 0 }, */ -/* {ENCR_AES_GCM_ICV8, 0 }, */ -/* {ENCR_AES_GCM_ICV12, 0 }, */ -/* {ENCR_AES_GCM_ICV16, 0 }, */ - {END_OF_LIST, 0 }, -}; - -/** - * Algorithms for integrity protection - */ -static kernel_algorithm_t integrity_algs[] = { - {AUTH_HMAC_MD5_96, SADB_AALG_MD5HMAC }, - {AUTH_HMAC_SHA1_96, SADB_AALG_SHA1HMAC }, - {AUTH_HMAC_SHA2_256_128, SADB_AALG_SHA256_HMAC }, - {AUTH_HMAC_SHA2_384_192, SADB_AALG_SHA384_HMAC }, - {AUTH_HMAC_SHA2_512_256, SADB_AALG_SHA512_HMAC }, -/* {AUTH_DES_MAC, 0, }, */ -/* {AUTH_KPDK_MD5, 0, }, */ -/* {AUTH_AES_XCBC_96, 0, }, */ - {END_OF_LIST, 0, }, -}; - -#if 0 -/** - * Algorithms for IPComp, unused yet - */ -static kernel_algorithm_t compression_algs[] = { -/* {IPCOMP_OUI, 0 }, */ - {IPCOMP_DEFLATE, SADB_X_CALG_DEFLATE }, - {IPCOMP_LZS, SADB_X_CALG_LZS }, -/* {IPCOMP_LZJH, 0 }, */ - {END_OF_LIST, 0 }, -}; -#endif - -/** - * Look up a kernel algorithm ID and its key size - */ -static int lookup_algorithm(kernel_algorithm_t *list, int ikev2) -{ - while (list->ikev2 != END_OF_LIST) - { - if (ikev2 == list->ikev2) - { - return list->kernel; - } - list++; - } - return 0; -} - -/** - * add a host behind a sadb_address extension - */ -static void host2ext(host_t *host, struct sadb_address *ext) -{ - sockaddr_t *host_addr = host->get_sockaddr(host); - socklen_t *len = host->get_sockaddr_len(host); - memcpy((char*)(ext + 1), host_addr, *len); - ext->sadb_address_len = PFKEY_LEN(sizeof(*ext) + *len); -} - -/** - * add a host to the given sadb_msg - */ -static void add_addr_ext(struct sadb_msg *msg, host_t *host, u_int16_t type) -{ - struct sadb_address *addr = (struct sadb_address*)PFKEY_EXT_ADD_NEXT(msg); - addr->sadb_address_exttype = type; - host2ext(host, addr); - PFKEY_EXT_ADD(msg, addr); -} - -/** - * adds an empty address extension to the given sadb_msg - */ -static void add_anyaddr_ext(struct sadb_msg *msg, int family, u_int8_t type) -{ - socklen_t len = (family == AF_INET) ? sizeof(struct sockaddr_in) : - sizeof(struct sockaddr_in6); - struct sadb_address *addr = (struct sadb_address*)PFKEY_EXT_ADD_NEXT(msg); - addr->sadb_address_exttype = type; - sockaddr_t *saddr = (sockaddr_t*)(addr + 1); - saddr->sa_family = family; - addr->sadb_address_len = PFKEY_LEN(sizeof(*addr) + len); - PFKEY_EXT_ADD(msg, addr); -} - -/** - * add udp encap extensions to a sadb_msg - */ -static void add_encap_ext(struct sadb_msg *msg, host_t *src, host_t *dst, - bool ports_only) -{ - struct sadb_x_nat_t_type* nat_type; - struct sadb_x_nat_t_port* nat_port; - - if (!ports_only) - { - nat_type = (struct sadb_x_nat_t_type*)PFKEY_EXT_ADD_NEXT(msg); - nat_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; - nat_type->sadb_x_nat_t_type_len = PFKEY_LEN(sizeof(struct sadb_x_nat_t_type)); - nat_type->sadb_x_nat_t_type_type = UDP_ENCAP_ESPINUDP; - PFKEY_EXT_ADD(msg, nat_type); - } - - nat_port = (struct sadb_x_nat_t_port*)PFKEY_EXT_ADD_NEXT(msg); - nat_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; - nat_port->sadb_x_nat_t_port_len = PFKEY_LEN(sizeof(struct sadb_x_nat_t_port)); - nat_port->sadb_x_nat_t_port_port = src->get_port(src); - PFKEY_EXT_ADD(msg, nat_port); - - nat_port = (struct sadb_x_nat_t_port*)PFKEY_EXT_ADD_NEXT(msg); - nat_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; - nat_port->sadb_x_nat_t_port_len = PFKEY_LEN(sizeof(struct sadb_x_nat_t_port)); - nat_port->sadb_x_nat_t_port_port = dst->get_port(dst); - PFKEY_EXT_ADD(msg, nat_port); -} - -/** - * build an SADB_X_ADDFLOW msg - */ -static void build_addflow(struct sadb_msg *msg, u_int8_t satype, u_int32_t spi, - host_t *src, host_t *dst, host_t *src_net, u_int8_t src_mask, - host_t *dst_net, u_int8_t dst_mask, u_int8_t protocol, bool replace) -{ - struct sadb_sa *sa; - struct sadb_protocol *proto; - host_t *host; - - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = SADB_X_ADDFLOW; - msg->sadb_msg_satype = satype; - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - - sa = (struct sadb_sa*)PFKEY_EXT_ADD_NEXT(msg); - sa->sadb_sa_exttype = SADB_EXT_SA; - sa->sadb_sa_spi = spi; - sa->sadb_sa_len = PFKEY_LEN(sizeof(struct sadb_sa)); - sa->sadb_sa_flags = replace ? SADB_X_SAFLAGS_REPLACEFLOW : 0; - PFKEY_EXT_ADD(msg, sa); - - if (!src) - { - add_anyaddr_ext(msg, src_net->get_family(src_net), SADB_EXT_ADDRESS_SRC); - } - else - { - add_addr_ext(msg, src, SADB_EXT_ADDRESS_SRC); - } - - if (!dst) - { - add_anyaddr_ext(msg, dst_net->get_family(dst_net), SADB_EXT_ADDRESS_DST); - } - else - { - add_addr_ext(msg, dst, SADB_EXT_ADDRESS_DST); - } - - add_addr_ext(msg, src_net, SADB_X_EXT_ADDRESS_SRC_FLOW); - add_addr_ext(msg, dst_net, SADB_X_EXT_ADDRESS_DST_FLOW); - - host = mask2host(src_net->get_family(src_net), src_mask); - add_addr_ext(msg, host, SADB_X_EXT_ADDRESS_SRC_MASK); - host->destroy(host); - - host = mask2host(dst_net->get_family(dst_net), dst_mask); - add_addr_ext(msg, host, SADB_X_EXT_ADDRESS_DST_MASK); - host->destroy(host); - - proto = (struct sadb_protocol*)PFKEY_EXT_ADD_NEXT(msg); - proto->sadb_protocol_exttype = SADB_X_EXT_PROTOCOL; - proto->sadb_protocol_len = PFKEY_LEN(sizeof(struct sadb_protocol)); - proto->sadb_protocol_proto = protocol; - PFKEY_EXT_ADD(msg, proto); -} - -/** - * build an SADB_X_DELFLOW msg - */ -static void build_delflow(struct sadb_msg *msg, u_int8_t satype, - host_t *src_net, u_int8_t src_mask, host_t *dst_net, u_int8_t dst_mask, - u_int8_t protocol) -{ - struct sadb_protocol *proto; - host_t *host; - - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = SADB_X_DELFLOW; - msg->sadb_msg_satype = satype; - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - - add_addr_ext(msg, src_net, SADB_X_EXT_ADDRESS_SRC_FLOW); - add_addr_ext(msg, dst_net, SADB_X_EXT_ADDRESS_DST_FLOW); - - host = mask2host(src_net->get_family(src_net), - src_mask); - add_addr_ext(msg, host, SADB_X_EXT_ADDRESS_SRC_MASK); - host->destroy(host); - - host = mask2host(dst_net->get_family(dst_net), - dst_mask); - add_addr_ext(msg, host, SADB_X_EXT_ADDRESS_DST_MASK); - host->destroy(host); - - proto = (struct sadb_protocol*)PFKEY_EXT_ADD_NEXT(msg); - proto->sadb_protocol_exttype = SADB_X_EXT_PROTOCOL; - proto->sadb_protocol_len = PFKEY_LEN(sizeof(struct sadb_protocol)); - proto->sadb_protocol_proto = protocol; - PFKEY_EXT_ADD(msg, proto); -} - -/** - * Parses a pfkey message received from the kernel - */ -static status_t parse_pfkey_message(struct sadb_msg *msg, pfkey_msg_t *out) -{ - struct sadb_ext* ext; - size_t len; - - memset(out, 0, sizeof(pfkey_msg_t)); - out->msg = msg; - - len = msg->sadb_msg_len; - len -= PFKEY_LEN(sizeof(struct sadb_msg)); - - ext = (struct sadb_ext*)(((char*)msg) + sizeof(struct sadb_msg)); - - while (len >= PFKEY_LEN(sizeof(struct sadb_ext))) - { - if (ext->sadb_ext_len < PFKEY_LEN(sizeof(struct sadb_ext)) || - ext->sadb_ext_len > len) - { - DBG1(DBG_KNL, "length of PF_KEY extension (%d) is invalid", ext->sadb_ext_type); - break; - } - - if ((ext->sadb_ext_type > SADB_EXT_MAX) || (!ext->sadb_ext_type)) - { - DBG1(DBG_KNL, "type of PF_KEY extension (%d) is invalid", ext->sadb_ext_type); - break; - } - - if (out->ext[ext->sadb_ext_type]) - { - DBG1(DBG_KNL, "duplicate PF_KEY extension of type (%d)", ext->sadb_ext_type); - break; - } - - out->ext[ext->sadb_ext_type] = ext; - ext = PFKEY_EXT_NEXT_LEN(ext, len); - } - - if (len) - { - DBG1(DBG_KNL, "PF_KEY message length is invalid"); - return FAILED; - } - - return SUCCESS; -} - -/** - * Send a message to a specific PF_KEY socket and handle the response. - */ -static status_t pfkey_send_socket(private_kernel_klips_ipsec_t *this, int socket, - struct sadb_msg *in, struct sadb_msg **out, size_t *out_len) -{ - unsigned char buf[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg; - int in_len, len; - - this->mutex_pfkey->lock(this->mutex_pfkey); - - in->sadb_msg_seq = ++this->seq; - in->sadb_msg_pid = getpid(); - - in_len = PFKEY_USER_LEN(in->sadb_msg_len); - - while (TRUE) - { - len = send(socket, in, in_len, 0); - - if (len != in_len) - { - switch (errno) - { - case EINTR: - /* interrupted, try again */ - continue; - case EINVAL: - case EEXIST: - case ESRCH: - /* we should also get a response for these from KLIPS */ - break; - default: - this->mutex_pfkey->unlock(this->mutex_pfkey); - DBG1(DBG_KNL, "error sending to PF_KEY socket: %s (%d)", - strerror(errno), errno); - return FAILED; - } - } - break; - } - - while (TRUE) - { - msg = (struct sadb_msg*)buf; - - len = recv(socket, buf, sizeof(buf), 0); - - if (len < 0) - { - if (errno == EINTR) - { - DBG1(DBG_KNL, "got interrupted"); - /* interrupted, try again */ - continue; - } - this->mutex_pfkey->unlock(this->mutex_pfkey); - DBG1(DBG_KNL, "error reading from PF_KEY socket: %s", strerror(errno)); - return FAILED; - } - if (len < sizeof(struct sadb_msg) || - msg->sadb_msg_len < PFKEY_LEN(sizeof(struct sadb_msg))) - { - this->mutex_pfkey->unlock(this->mutex_pfkey); - DBG1(DBG_KNL, "received corrupted PF_KEY message"); - return FAILED; - } - if (msg->sadb_msg_len > len / PFKEY_ALIGNMENT) - { - this->mutex_pfkey->unlock(this->mutex_pfkey); - DBG1(DBG_KNL, "buffer was too small to receive the complete PF_KEY message"); - return FAILED; - } - if (msg->sadb_msg_pid != in->sadb_msg_pid) - { - DBG2(DBG_KNL, "received PF_KEY message is not intended for us"); - continue; - } - if (msg->sadb_msg_seq != this->seq) - { - DBG1(DBG_KNL, "received PF_KEY message with invalid sequence number," - " was %d expected %d", msg->sadb_msg_seq, this->seq); - if (msg->sadb_msg_seq < this->seq) - { - continue; - } - this->mutex_pfkey->unlock(this->mutex_pfkey); - return FAILED; - } - if (msg->sadb_msg_type != in->sadb_msg_type) - { - DBG2(DBG_KNL, "received PF_KEY message of wrong type," - " was %d expected %d, ignoring", - msg->sadb_msg_type, in->sadb_msg_type); - } - break; - } - - *out_len = len; - *out = (struct sadb_msg*)malloc(len); - memcpy(*out, buf, len); - - this->mutex_pfkey->unlock(this->mutex_pfkey); - - return SUCCESS; -} - -/** - * Send a message to the default PF_KEY socket. - */ -static status_t pfkey_send(private_kernel_klips_ipsec_t *this, - struct sadb_msg *in, struct sadb_msg **out, size_t *out_len) -{ - return pfkey_send_socket(this, this->socket, in, out, out_len); -} - -/** - * Send a message to the default PF_KEY socket and handle the response. - */ -static status_t pfkey_send_ack(private_kernel_klips_ipsec_t *this, struct sadb_msg *in) -{ - struct sadb_msg *out; - size_t len; - - if (pfkey_send(this, in, &out, &len) != SUCCESS) - { - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "PF_KEY error: %s (%d)", - strerror(out->sadb_msg_errno), out->sadb_msg_errno); - free(out); - return FAILED; - } - free(out); - return SUCCESS; -} - -/** - * Add an eroute to KLIPS - */ -static status_t add_eroute(private_kernel_klips_ipsec_t *this, u_int8_t satype, - u_int32_t spi, host_t *src, host_t *dst, host_t *src_net, u_int8_t src_mask, - host_t *dst_net, u_int8_t dst_mask, u_int8_t protocol, bool replace) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg = (struct sadb_msg*)request; - - memset(&request, 0, sizeof(request)); - - build_addflow(msg, satype, spi, src, dst, src_net, src_mask, - dst_net, dst_mask, protocol, replace); - - return pfkey_send_ack(this, msg); -} - -/** - * Delete an eroute fom KLIPS - */ -static status_t del_eroute(private_kernel_klips_ipsec_t *this, u_int8_t satype, - host_t *src_net, u_int8_t src_mask, host_t *dst_net, u_int8_t dst_mask, - u_int8_t protocol) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg = (struct sadb_msg*)request; - - memset(&request, 0, sizeof(request)); - - build_delflow(msg, satype, src_net, src_mask, dst_net, dst_mask, protocol); - - return pfkey_send_ack(this, msg); -} - -/** - * Process a SADB_ACQUIRE message from the kernel - */ -static void process_acquire(private_kernel_klips_ipsec_t *this, struct sadb_msg* msg) -{ - pfkey_msg_t response; - host_t *src, *dst; - u_int32_t reqid; - u_int8_t proto; - policy_entry_t *policy; - job_t *job; - - switch (msg->sadb_msg_satype) - { - case SADB_SATYPE_UNSPEC: - case SADB_SATYPE_ESP: - case SADB_SATYPE_AH: - break; - default: - /* acquire for AH/ESP only */ - return; - } - - if (parse_pfkey_message(msg, &response) != SUCCESS) - { - DBG1(DBG_KNL, "parsing SADB_ACQUIRE from kernel failed"); - return; - } - - /* KLIPS provides us only with the source and destination address, - * and the transport protocol of the packet that triggered the policy. - * we use this information to find a matching policy in our cache. - * because KLIPS installs a narrow %hold eroute covering only this information, - * we replace both the %trap and this %hold eroutes with a broader %hold - * eroute covering the whole policy */ - src = host_create_from_sockaddr((sockaddr_t*)(response.src + 1)); - dst = host_create_from_sockaddr((sockaddr_t*)(response.dst + 1)); - proto = response.src->sadb_address_proto; - if (!src || !dst || src->get_family(src) != dst->get_family(dst)) - { - DBG1(DBG_KNL, "received an SADB_ACQUIRE with invalid hosts"); - return; - } - - DBG2(DBG_KNL, "received an SADB_ACQUIRE for %H == %H : %d", src, dst, proto); - this->mutex->lock(this->mutex); - if (this->policies->find_first(this->policies, - (linked_list_match_t)policy_entry_match_byaddrs, - (void**)&policy, src, dst) != SUCCESS) - { - this->mutex->unlock(this->mutex); - DBG1(DBG_KNL, "received an SADB_ACQUIRE, but found no matching policy"); - return; - } - if ((reqid = policy->reqid) == 0) - { - this->mutex->unlock(this->mutex); - DBG1(DBG_KNL, "received an SADB_ACQUIRE, but policy is not routed anymore"); - return; - } - - /* add a broad %hold eroute that replaces the %trap eroute */ - add_eroute(this, SADB_X_SATYPE_INT, htonl(SPI_HOLD), NULL, NULL, - policy->src.net, policy->src.mask, policy->dst.net, policy->dst.mask, - policy->src.proto, TRUE); - - /* remove the narrow %hold eroute installed by KLIPS */ - del_eroute(this, SADB_X_SATYPE_INT, src, 32, dst, 32, proto); - - this->mutex->unlock(this->mutex); - - DBG2(DBG_KNL, "received an SADB_ACQUIRE"); - DBG1(DBG_KNL, "creating acquire job for CHILD_SA with reqid {%d}", reqid); - job = (job_t*)acquire_job_create(reqid, NULL, NULL); - charon->processor->queue_job(charon->processor, job); -} - -/** - * Process a SADB_X_NAT_T_NEW_MAPPING message from the kernel - */ -static void process_mapping(private_kernel_klips_ipsec_t *this, struct sadb_msg* msg) -{ - pfkey_msg_t response; - u_int32_t spi, reqid; - host_t *old_src, *new_src; - job_t *job; - - DBG2(DBG_KNL, "received an SADB_X_NAT_T_NEW_MAPPING"); - - if (parse_pfkey_message(msg, &response) != SUCCESS) - { - DBG1(DBG_KNL, "parsing SADB_X_NAT_T_NEW_MAPPING from kernel failed"); - return; - } - - spi = response.sa->sadb_sa_spi; - - if (proto_satype2ike(msg->sadb_msg_satype) == PROTO_ESP) - { - sa_entry_t *sa; - sockaddr_t *addr = (sockaddr_t*)(response.src + 1); - old_src = host_create_from_sockaddr(addr); - - this->mutex->lock(this->mutex); - if (!old_src || this->installed_sas->find_first(this->installed_sas, - (linked_list_match_t)sa_entry_match_encapbysrc, - (void**)&sa, &spi, old_src) != SUCCESS) - { - this->mutex->unlock(this->mutex); - DBG1(DBG_KNL, "received an SADB_X_NAT_T_NEW_MAPPING, but found no matching SA"); - return; - } - reqid = sa->reqid; - this->mutex->unlock(this->mutex); - - addr = (sockaddr_t*)(response.dst + 1); - switch (addr->sa_family) - { - case AF_INET: - { - struct sockaddr_in *sin = (struct sockaddr_in*)addr; - sin->sin_port = htons(response.x_natt_dport->sadb_x_nat_t_port_port); - } - case AF_INET6: - { - struct sockaddr_in6 *sin6 = (struct sockaddr_in6*)addr; - sin6->sin6_port = htons(response.x_natt_dport->sadb_x_nat_t_port_port); - } - default: - break; - } - new_src = host_create_from_sockaddr(addr); - if (new_src) - { - DBG1(DBG_KNL, "NAT mappings of ESP CHILD_SA with SPI %.8x and" - " reqid {%d} changed, queuing update job", ntohl(spi), reqid); - job = (job_t*)update_sa_job_create(reqid, new_src); - charon->processor->queue_job(charon->processor, job); - } - } -} - -/** - * Receives events from kernel - */ -static job_requeue_t receive_events(private_kernel_klips_ipsec_t *this) -{ - unsigned char buf[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg = (struct sadb_msg*)buf; - int len; - bool oldstate; - - oldstate = thread_cancelability(TRUE); - len = recv(this->socket_events, buf, sizeof(buf), 0); - thread_cancelability(oldstate); - - if (len < 0) - { - switch (errno) - { - case EINTR: - /* interrupted, try again */ - return JOB_REQUEUE_DIRECT; - case EAGAIN: - /* no data ready, select again */ - return JOB_REQUEUE_DIRECT; - default: - DBG1(DBG_KNL, "unable to receive from PF_KEY event socket"); - sleep(1); - return JOB_REQUEUE_FAIR; - } - } - - if (len < sizeof(struct sadb_msg) || - msg->sadb_msg_len < PFKEY_LEN(sizeof(struct sadb_msg))) - { - DBG2(DBG_KNL, "received corrupted PF_KEY message"); - return JOB_REQUEUE_DIRECT; - } - if (msg->sadb_msg_pid != 0) - { /* not from kernel. not interested, try another one */ - return JOB_REQUEUE_DIRECT; - } - if (msg->sadb_msg_len > len / PFKEY_ALIGNMENT) - { - DBG1(DBG_KNL, "buffer was too small to receive the complete PF_KEY message"); - return JOB_REQUEUE_DIRECT; - } - - switch (msg->sadb_msg_type) - { - case SADB_ACQUIRE: - process_acquire(this, msg); - break; - case SADB_EXPIRE: - /* SADB_EXPIRE events in KLIPS are only triggered by traffic (even for - * the time based limits). So if there is no traffic for a longer - * period than configured as hard limit, we wouldn't be able to rekey - * the SA and just receive the hard expire and thus delete the SA. - * To avoid this behavior and to make charon behave as with the other - * kernel plugins, we implement the expiration of SAs ourselves. */ - break; - case SADB_X_NAT_T_NEW_MAPPING: - process_mapping(this, msg); - break; - default: - break; - } - - return JOB_REQUEUE_DIRECT; -} - -typedef enum { - /** an SPI has expired */ - EXPIRE_TYPE_SPI, - /** a CHILD_SA has to be rekeyed */ - EXPIRE_TYPE_SOFT, - /** a CHILD_SA has to be deleted */ - EXPIRE_TYPE_HARD -} expire_type_t; - -typedef struct sa_expire_t sa_expire_t; - -struct sa_expire_t { - /** kernel interface */ - private_kernel_klips_ipsec_t *this; - /** the SPI of the expiring SA */ - u_int32_t spi; - /** the protocol of the expiring SA */ - protocol_id_t protocol; - /** the reqid of the expiring SA*/ - u_int32_t reqid; - /** what type of expire this is */ - expire_type_t type; -}; - -/** - * Called when an SA expires - */ -static job_requeue_t sa_expires(sa_expire_t *expire) -{ - private_kernel_klips_ipsec_t *this = expire->this; - protocol_id_t protocol = expire->protocol; - u_int32_t spi = expire->spi, reqid = expire->reqid; - bool hard = expire->type != EXPIRE_TYPE_SOFT; - sa_entry_t *cached_sa; - linked_list_t *list; - job_t *job; - - /* for an expired SPI we first check whether the CHILD_SA got installed - * in the meantime, for expired SAs we check whether they are still installed */ - list = expire->type == EXPIRE_TYPE_SPI ? this->allocated_spis : this->installed_sas; - - this->mutex->lock(this->mutex); - if (list->find_first(list, (linked_list_match_t)sa_entry_match_byid, - (void**)&cached_sa, &protocol, &spi, &reqid) != SUCCESS) - { - /* we found no entry: - * - for SPIs, a CHILD_SA has been installed - * - for SAs, the CHILD_SA has already been deleted */ - this->mutex->unlock(this->mutex); - return JOB_REQUEUE_NONE; - } - else - { - list->remove(list, cached_sa, NULL); - sa_entry_destroy(cached_sa); - } - this->mutex->unlock(this->mutex); - - DBG2(DBG_KNL, "%N CHILD_SA with SPI %.8x and reqid {%d} expired", - protocol_id_names, protocol, ntohl(spi), reqid); - - DBG1(DBG_KNL, "creating %s job for %N CHILD_SA with SPI %.8x and reqid {%d}", - hard ? "delete" : "rekey", protocol_id_names, - protocol, ntohl(spi), reqid); - if (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); - return JOB_REQUEUE_NONE; -} - -/** - * Schedule an expire job for an SA. Time is in seconds. - */ -static void schedule_expire(private_kernel_klips_ipsec_t *this, - protocol_id_t protocol, u_int32_t spi, - u_int32_t reqid, expire_type_t type, u_int32_t time) -{ - callback_job_t *job; - sa_expire_t *expire = malloc_thing(sa_expire_t); - expire->this = this; - expire->protocol = protocol; - expire->spi = spi; - expire->reqid = reqid; - expire->type = type; - job = callback_job_create((callback_job_cb_t)sa_expires, expire, free, NULL); - charon->scheduler->schedule_job(charon->scheduler, (job_t*)job, time); -} - -/** - * Implementation of kernel_interface_t.get_spi. - */ -static status_t get_spi(private_kernel_klips_ipsec_t *this, - host_t *src, host_t *dst, - protocol_id_t protocol, u_int32_t reqid, - u_int32_t *spi) -{ - /* we cannot use SADB_GETSPI because KLIPS does not allow us to set the - * NAT-T type in an SADB_UPDATE which we would have to use to update the - * implicitly created SA. - */ - rng_t *rng; - u_int32_t spi_gen; - - rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK); - if (!rng) - { - DBG1(DBG_KNL, "allocating SPI failed: no RNG"); - return FAILED; - } - rng->get_bytes(rng, sizeof(spi_gen), (void*)&spi_gen); - rng->destroy(rng); - - /* charon's SPIs lie within the range from 0xc0000000 to 0xcFFFFFFF */ - spi_gen = 0xc0000000 | (spi_gen & 0x0FFFFFFF); - - DBG2(DBG_KNL, "allocated SPI %.8x for %N SA between %#H..%#H", - spi_gen, protocol_id_names, protocol, src, dst); - - *spi = htonl(spi_gen); - - this->mutex->lock(this->mutex); - this->allocated_spis->insert_last(this->allocated_spis, - create_sa_entry(protocol, *spi, reqid, NULL, NULL, FALSE, TRUE)); - this->mutex->unlock(this->mutex); - schedule_expire(this, protocol, *spi, reqid, EXPIRE_TYPE_SPI, SPI_TIMEOUT); - - return SUCCESS; -} - -/** - * Implementation of kernel_interface_t.get_cpi. - */ -static status_t get_cpi(private_kernel_klips_ipsec_t *this, - host_t *src, host_t *dst, - u_int32_t reqid, u_int16_t *cpi) -{ - return FAILED; -} - -/** - * Add a pseudo IPIP SA for tunnel mode with KLIPS. - */ -static status_t add_ipip_sa(private_kernel_klips_ipsec_t *this, - host_t *src, host_t *dst, u_int32_t spi, u_int32_t reqid) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg, *out; - struct sadb_sa *sa; - size_t len; - - memset(&request, 0, sizeof(request)); - - DBG2(DBG_KNL, "adding pseudo IPIP SA with SPI %.8x and reqid {%d}", ntohl(spi), reqid); - - msg = (struct sadb_msg*)request; - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = SADB_ADD; - msg->sadb_msg_satype = SADB_X_SATYPE_IPIP; - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - - sa = (struct sadb_sa*)PFKEY_EXT_ADD_NEXT(msg); - sa->sadb_sa_exttype = SADB_EXT_SA; - sa->sadb_sa_len = PFKEY_LEN(sizeof(struct sadb_sa)); - sa->sadb_sa_spi = spi; - sa->sadb_sa_state = SADB_SASTATE_MATURE; - PFKEY_EXT_ADD(msg, sa); - - add_addr_ext(msg, src, SADB_EXT_ADDRESS_SRC); - add_addr_ext(msg, dst, SADB_EXT_ADDRESS_DST); - - if (pfkey_send(this, msg, &out, &len) != SUCCESS) - { - DBG1(DBG_KNL, "unable to add pseudo IPIP SA with SPI %.8x", ntohl(spi)); - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "unable to add pseudo IPIP SA with SPI %.8x: %s (%d)", - ntohl(spi), strerror(out->sadb_msg_errno), out->sadb_msg_errno); - free(out); - return FAILED; - } - - free(out); - return SUCCESS; -} - -/** - * group the IPIP SA required for tunnel mode with the outer SA - */ -static status_t group_ipip_sa(private_kernel_klips_ipsec_t *this, - host_t *src, host_t *dst, u_int32_t spi, - protocol_id_t protocol, u_int32_t reqid) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg, *out; - struct sadb_sa *sa; - struct sadb_x_satype *satype; - size_t len; - - memset(&request, 0, sizeof(request)); - - DBG2(DBG_KNL, "grouping SAs with SPI %.8x and reqid {%d}", ntohl(spi), reqid); - - msg = (struct sadb_msg*)request; - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = SADB_X_GRPSA; - msg->sadb_msg_satype = SADB_X_SATYPE_IPIP; - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - - sa = (struct sadb_sa*)PFKEY_EXT_ADD_NEXT(msg); - sa->sadb_sa_exttype = SADB_EXT_SA; - sa->sadb_sa_len = PFKEY_LEN(sizeof(struct sadb_sa)); - sa->sadb_sa_spi = spi; - sa->sadb_sa_state = SADB_SASTATE_MATURE; - PFKEY_EXT_ADD(msg, sa); - - add_addr_ext(msg, dst, SADB_EXT_ADDRESS_DST); - - satype = (struct sadb_x_satype*)PFKEY_EXT_ADD_NEXT(msg); - satype->sadb_x_satype_exttype = SADB_X_EXT_SATYPE2; - satype->sadb_x_satype_len = PFKEY_LEN(sizeof(struct sadb_x_satype)); - satype->sadb_x_satype_satype = proto_ike2satype(protocol); - PFKEY_EXT_ADD(msg, satype); - - sa = (struct sadb_sa*)PFKEY_EXT_ADD_NEXT(msg); - sa->sadb_sa_exttype = SADB_X_EXT_SA2; - sa->sadb_sa_len = PFKEY_LEN(sizeof(struct sadb_sa)); - sa->sadb_sa_spi = spi; - sa->sadb_sa_state = SADB_SASTATE_MATURE; - PFKEY_EXT_ADD(msg, sa); - - add_addr_ext(msg, dst, SADB_X_EXT_ADDRESS_DST2); - - if (pfkey_send(this, msg, &out, &len) != SUCCESS) - { - DBG1(DBG_KNL, "unable to group SAs with SPI %.8x", ntohl(spi)); - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "unable to group SAs with SPI %.8x: %s (%d)", - ntohl(spi), strerror(out->sadb_msg_errno), out->sadb_msg_errno); - free(out); - return FAILED; - } - - free(out); - return SUCCESS; -} - -/** - * Implementation of kernel_interface_t.add_sa. - */ -static status_t add_sa(private_kernel_klips_ipsec_t *this, - host_t *src, host_t *dst, u_int32_t spi, - protocol_id_t protocol, u_int32_t reqid, - lifetime_cfg_t *lifetime, - u_int16_t enc_alg, chunk_t enc_key, - u_int16_t int_alg, chunk_t int_key, - ipsec_mode_t mode, u_int16_t ipcomp, u_int16_t cpi, - bool encap, bool inbound, traffic_selector_t *src_ts, - traffic_selector_t *dst_ts) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg, *out; - struct sadb_sa *sa; - struct sadb_key *key; - size_t len; - - if (inbound) - { - /* for inbound SAs we allocated an SPI via get_spi, so we first check - * whether that SPI has already expired (race condition) */ - sa_entry_t *alloc_spi; - this->mutex->lock(this->mutex); - if (this->allocated_spis->find_first(this->allocated_spis, - (linked_list_match_t)sa_entry_match_byid, (void**)&alloc_spi, - &protocol, &spi, &reqid) != SUCCESS) - { - this->mutex->unlock(this->mutex); - DBG1(DBG_KNL, "allocated SPI %.8x has already expired", ntohl(spi)); - return FAILED; - } - else - { - this->allocated_spis->remove(this->allocated_spis, alloc_spi, NULL); - sa_entry_destroy(alloc_spi); - } - this->mutex->unlock(this->mutex); - } - - memset(&request, 0, sizeof(request)); - - DBG2(DBG_KNL, "adding SAD entry with SPI %.8x and reqid {%d}", ntohl(spi), reqid); - - msg = (struct sadb_msg*)request; - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = SADB_ADD; - msg->sadb_msg_satype = proto_ike2satype(protocol); - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - - sa = (struct sadb_sa*)PFKEY_EXT_ADD_NEXT(msg); - sa->sadb_sa_exttype = SADB_EXT_SA; - sa->sadb_sa_len = PFKEY_LEN(sizeof(struct sadb_sa)); - sa->sadb_sa_spi = spi; - sa->sadb_sa_state = SADB_SASTATE_MATURE; - sa->sadb_sa_replay = (protocol == IPPROTO_COMP) ? 0 : 32; - sa->sadb_sa_auth = lookup_algorithm(integrity_algs, int_alg); - sa->sadb_sa_encrypt = lookup_algorithm(encryption_algs, enc_alg); - PFKEY_EXT_ADD(msg, sa); - - add_addr_ext(msg, src, SADB_EXT_ADDRESS_SRC); - add_addr_ext(msg, dst, SADB_EXT_ADDRESS_DST); - - if (enc_alg != ENCR_UNDEFINED) - { - if (!sa->sadb_sa_encrypt) - { - DBG1(DBG_KNL, "algorithm %N not supported by kernel!", - encryption_algorithm_names, enc_alg); - return FAILED; - } - DBG2(DBG_KNL, " using encryption algorithm %N with key size %d", - encryption_algorithm_names, enc_alg, enc_key.len * 8); - - key = (struct sadb_key*)PFKEY_EXT_ADD_NEXT(msg); - key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT; - key->sadb_key_bits = enc_key.len * 8; - key->sadb_key_len = PFKEY_LEN(sizeof(struct sadb_key) + enc_key.len); - memcpy(key + 1, enc_key.ptr, enc_key.len); - - PFKEY_EXT_ADD(msg, key); - } - - if (int_alg != AUTH_UNDEFINED) - { - if (!sa->sadb_sa_auth) - { - DBG1(DBG_KNL, "algorithm %N not supported by kernel!", - integrity_algorithm_names, int_alg); - return FAILED; - } - DBG2(DBG_KNL, " using integrity algorithm %N with key size %d", - integrity_algorithm_names, int_alg, int_key.len * 8); - - key = (struct sadb_key*)PFKEY_EXT_ADD_NEXT(msg); - key->sadb_key_exttype = SADB_EXT_KEY_AUTH; - key->sadb_key_bits = int_key.len * 8; - key->sadb_key_len = PFKEY_LEN(sizeof(struct sadb_key) + int_key.len); - memcpy(key + 1, int_key.ptr, int_key.len); - - PFKEY_EXT_ADD(msg, key); - } - - if (ipcomp != IPCOMP_NONE) - { - /*TODO*/ - } - - if (encap) - { - add_encap_ext(msg, src, dst, FALSE); - } - - if (pfkey_send(this, msg, &out, &len) != SUCCESS) - { - DBG1(DBG_KNL, "unable to add SAD entry with SPI %.8x", ntohl(spi)); - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "unable to add SAD entry with SPI %.8x: %s (%d)", - ntohl(spi), strerror(out->sadb_msg_errno), out->sadb_msg_errno); - free(out); - return FAILED; - } - free(out); - - /* for tunnel mode SAs we have to install an additional IPIP SA and - * group the two SAs together */ - if (mode == MODE_TUNNEL) - { - if (add_ipip_sa(this, src, dst, spi, reqid) != SUCCESS || - group_ipip_sa(this, src, dst, spi, protocol, reqid) != SUCCESS) - { - DBG1(DBG_KNL, "unable to add SAD entry with SPI %.8x", ntohl(spi)); - return FAILED; - } - } - - this->mutex->lock(this->mutex); - /* we cache this SA for two reasons: - * - in case an SADB_X_NAT_T_MAPPING_NEW event occurs (we need to find the reqid then) - * - to decide if an expired SA is still installed */ - this->installed_sas->insert_last(this->installed_sas, - create_sa_entry(protocol, spi, reqid, src, dst, encap, inbound)); - this->mutex->unlock(this->mutex); - - /* Although KLIPS supports SADB_EXT_LIFETIME_SOFT/HARD, we handle the lifetime - * of SAs manually in the plugin. Refer to the comments in receive_events() - * for details. */ - if (lifetime->time.rekey) - { - schedule_expire(this, protocol, spi, reqid, EXPIRE_TYPE_SOFT, lifetime->time.rekey); - } - - if (lifetime->time.life) - { - schedule_expire(this, protocol, spi, reqid, EXPIRE_TYPE_HARD, lifetime->time.life); - } - - return SUCCESS; -} - -/** - * Implementation of kernel_interface_t.update_sa. - */ -static status_t update_sa(private_kernel_klips_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 encap, bool new_encap) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg, *out; - struct sadb_sa *sa; - size_t len; - - /* we can't update the SA if any of the ip addresses have changed. - * that's because we can't use SADB_UPDATE and by deleting and readding the - * SA the sequence numbers would get lost */ - if (!src->ip_equals(src, new_src) || - !dst->ip_equals(dst, new_dst)) - { - DBG1(DBG_KNL, "unable to update SAD entry with SPI %.8x: address changes" - " are not supported", ntohl(spi)); - return NOT_SUPPORTED; - } - - /* because KLIPS does not allow us to change the NAT-T type in an SADB_UPDATE, - * we can't update the SA if the encap flag has changed since installing it */ - if (encap != new_encap) - { - DBG1(DBG_KNL, "unable to update SAD entry with SPI %.8x: change of UDP" - " encapsulation is not supported", ntohl(spi)); - return NOT_SUPPORTED; - } - - DBG2(DBG_KNL, "updating SAD entry with SPI %.8x from %#H..%#H to %#H..%#H", - ntohl(spi), src, dst, new_src, new_dst); - - memset(&request, 0, sizeof(request)); - - msg = (struct sadb_msg*)request; - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = SADB_UPDATE; - msg->sadb_msg_satype = proto_ike2satype(protocol); - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - - sa = (struct sadb_sa*)PFKEY_EXT_ADD_NEXT(msg); - sa->sadb_sa_exttype = SADB_EXT_SA; - sa->sadb_sa_len = PFKEY_LEN(sizeof(struct sadb_sa)); - sa->sadb_sa_spi = spi; - sa->sadb_sa_encrypt = SADB_EALG_AESCBC; /* ignored */ - sa->sadb_sa_auth = SADB_AALG_SHA1HMAC; /* ignored */ - sa->sadb_sa_state = SADB_SASTATE_MATURE; - PFKEY_EXT_ADD(msg, sa); - - add_addr_ext(msg, src, SADB_EXT_ADDRESS_SRC); - add_addr_ext(msg, dst, SADB_EXT_ADDRESS_DST); - - add_encap_ext(msg, new_src, new_dst, TRUE); - - if (pfkey_send(this, msg, &out, &len) != SUCCESS) - { - DBG1(DBG_KNL, "unable to update SAD entry with SPI %.8x", ntohl(spi)); - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "unable to update SAD entry with SPI %.8x: %s (%d)", - ntohl(spi), strerror(out->sadb_msg_errno), out->sadb_msg_errno); - free(out); - return FAILED; - } - free(out); - - return SUCCESS; -} - -/** - * Implementation of kernel_interface_t.query_sa. - */ -static status_t query_sa(private_kernel_klips_ipsec_t *this, host_t *src, - host_t *dst, u_int32_t spi, protocol_id_t protocol, - u_int64_t *bytes) -{ - return NOT_SUPPORTED; /* TODO */ -} - -/** - * Implementation of kernel_interface_t.del_sa. - */ -static status_t del_sa(private_kernel_klips_ipsec_t *this, host_t *src, - host_t *dst, u_int32_t spi, protocol_id_t protocol, - u_int16_t cpi) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg, *out; - struct sadb_sa *sa; - sa_entry_t *cached_sa; - size_t len; - - memset(&request, 0, sizeof(request)); - - /* all grouped SAs are automatically deleted by KLIPS as soon as - * one of them is deleted, therefore we delete only the main one */ - DBG2(DBG_KNL, "deleting SAD entry with SPI %.8x", ntohl(spi)); - - this->mutex->lock(this->mutex); - /* this should not fail, but we don't care if it does, let the kernel decide - * whether this SA exists or not */ - if (this->installed_sas->find_first(this->installed_sas, - (linked_list_match_t)sa_entry_match_bydst, (void**)&cached_sa, - &protocol, &spi, dst) == SUCCESS) - { - this->installed_sas->remove(this->installed_sas, cached_sa, NULL); - sa_entry_destroy(cached_sa); - } - this->mutex->unlock(this->mutex); - - msg = (struct sadb_msg*)request; - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = SADB_DELETE; - msg->sadb_msg_satype = proto_ike2satype(protocol); - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - - sa = (struct sadb_sa*)PFKEY_EXT_ADD_NEXT(msg); - sa->sadb_sa_exttype = SADB_EXT_SA; - sa->sadb_sa_len = PFKEY_LEN(sizeof(struct sadb_sa)); - sa->sadb_sa_spi = spi; - PFKEY_EXT_ADD(msg, sa); - - /* the kernel wants an SADB_EXT_ADDRESS_SRC to be present even though - * it is not used for anything. */ - add_anyaddr_ext(msg, dst->get_family(dst), SADB_EXT_ADDRESS_SRC); - add_addr_ext(msg, dst, SADB_EXT_ADDRESS_DST); - - if (pfkey_send(this, msg, &out, &len) != SUCCESS) - { - DBG1(DBG_KNL, "unable to delete SAD entry with SPI %.8x", ntohl(spi)); - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "unable to delete SAD entry with SPI %.8x: %s (%d)", - ntohl(spi), strerror(out->sadb_msg_errno), out->sadb_msg_errno); - free(out); - return FAILED; - } - - DBG2(DBG_KNL, "deleted SAD entry with SPI %.8x", ntohl(spi)); - free(out); - return SUCCESS; -} - -/** - * Implementation of kernel_interface_t.add_policy. - */ -static status_t add_policy(private_kernel_klips_ipsec_t *this, - host_t *src, host_t *dst, - traffic_selector_t *src_ts, - traffic_selector_t *dst_ts, - policy_dir_t direction, u_int32_t spi, - protocol_id_t protocol, u_int32_t reqid, - ipsec_mode_t mode, u_int16_t ipcomp, u_int16_t cpi, - bool routed) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg, *out; - policy_entry_t *policy, *found = NULL; - u_int8_t satype; - size_t len; - - if (direction == POLICY_FWD) - { - /* no forward policies for KLIPS */ - return SUCCESS; - } - - /* tunnel mode policies direct the packets into the pseudo IPIP SA */ - satype = (mode == MODE_TUNNEL) ? SADB_X_SATYPE_IPIP : - proto_ike2satype(protocol); - - /* create a policy */ - policy = create_policy_entry(src_ts, dst_ts, direction); - - /* find a matching policy */ - this->mutex->lock(this->mutex); - if (this->policies->find_first(this->policies, - (linked_list_match_t)policy_entry_equals, (void**)&found, policy) == SUCCESS) - { - /* use existing policy */ - DBG2(DBG_KNL, "policy %R === %R %N already exists, increasing" - " refcount", src_ts, dst_ts, - policy_dir_names, direction); - policy_entry_destroy(policy); - policy = found; - } - else - { - /* apply the new one, if we have no such policy */ - this->policies->insert_last(this->policies, policy); - } - - if (routed) - { - /* we install this as a %trap eroute in the kernel, later to be - * triggered by packets matching the policy (-> ACQUIRE). */ - spi = htonl(SPI_TRAP); - satype = SADB_X_SATYPE_INT; - - /* the reqid is always set to the latest child SA that trapped this - * policy. we will need this reqid upon receiving an acquire. */ - policy->reqid = reqid; - - /* increase the trap counter */ - policy->trapcount++; - - if (policy->activecount) - { - /* we do not replace the current policy in the kernel while a - * policy is actively used */ - this->mutex->unlock(this->mutex); - return SUCCESS; - } - } - else - { - /* increase the reference counter */ - policy->activecount++; - } - - DBG2(DBG_KNL, "adding policy %R === %R %N", src_ts, dst_ts, - policy_dir_names, direction); - - memset(&request, 0, sizeof(request)); - - msg = (struct sadb_msg*)request; - - /* FIXME: SADB_X_SAFLAGS_INFLOW may be required, if we add an inbound policy for an IPIP SA */ - build_addflow(msg, satype, spi, routed ? NULL : src, routed ? NULL : dst, - policy->src.net, policy->src.mask, policy->dst.net, policy->dst.mask, - policy->src.proto, found != NULL); - - this->mutex->unlock(this->mutex); - - if (pfkey_send(this, msg, &out, &len) != SUCCESS) - { - DBG1(DBG_KNL, "unable to add policy %R === %R %N", src_ts, dst_ts, - policy_dir_names, direction); - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "unable to add policy %R === %R %N: %s (%d)", src_ts, dst_ts, - policy_dir_names, direction, - strerror(out->sadb_msg_errno), out->sadb_msg_errno); - free(out); - return FAILED; - } - free(out); - - this->mutex->lock(this->mutex); - - /* we try to find the policy again and install the route if needed */ - if (this->policies->find_last(this->policies, NULL, (void**)&policy) != SUCCESS) - { - this->mutex->unlock(this->mutex); - DBG2(DBG_KNL, "the policy %R === %R %N is already gone, ignoring", - src_ts, dst_ts, policy_dir_names, direction); - return SUCCESS; - } - - /* KLIPS requires a special route that directs traffic that matches this - * policy to one of the virtual ipsec interfaces. The virtual interface - * has to be attached to the physical one the traffic runs over. - * This is a special case of the source route we install in other kernel - * interfaces. - * In the following cases we do NOT install a source route (but just a - * regular route): - * - we are not in tunnel mode - * - we are using IPv6 (does not work correctly yet!) - * - routing is disabled via strongswan.conf - */ - if (policy->route == NULL && direction == POLICY_OUT) - { - char *iface; - ipsec_dev_t *dev; - route_entry_t *route = malloc_thing(route_entry_t); - route->src_ip = NULL; - - if (mode != MODE_TRANSPORT && src->get_family(src) != AF_INET6 && - this->install_routes) - { - charon->kernel_interface->get_address_by_ts(charon->kernel_interface, - src_ts, &route->src_ip); - } - - if (!route->src_ip) - { - route->src_ip = host_create_any(src->get_family(src)); - } - - /* find the virtual interface */ - iface = charon->kernel_interface->get_interface(charon->kernel_interface, - src); - if (find_ipsec_dev(this, iface, &dev) == SUCCESS) - { - /* above, we got either the name of a virtual or a physical - * interface. for both cases it means we already have the devices - * properly attached (assuming that we are exclusively attaching - * ipsec devices). */ - dev->refcount++; - } - else - { - /* there is no record of a mapping with the returned interface. - * thus, we attach the first free virtual interface we find to - * it. As above we assume we are the only client fiddling with - * ipsec devices. */ - if (this->ipsec_devices->find_first(this->ipsec_devices, - (linked_list_match_t)ipsec_dev_match_free, - (void**)&dev) == SUCCESS) - { - if (attach_ipsec_dev(dev->name, iface) == SUCCESS) - { - strncpy(dev->phys_name, iface, IFNAMSIZ); - dev->refcount = 1; - } - else - { - DBG1(DBG_KNL, "failed to attach virtual interface %s" - " to %s", dev->name, iface); - this->mutex->unlock(this->mutex); - free(iface); - return FAILED; - } - } - else - { - this->mutex->unlock(this->mutex); - DBG1(DBG_KNL, "failed to attach a virtual interface to %s: no" - " virtual interfaces left", iface); - free(iface); - return FAILED; - } - } - free(iface); - route->if_name = strdup(dev->name); - - /* get the nexthop to dst */ - route->gateway = charon->kernel_interface->get_nexthop( - charon->kernel_interface, dst); - route->dst_net = chunk_clone(policy->dst.net->get_address(policy->dst.net)); - route->prefixlen = policy->dst.mask; - - 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 route for policy %R === %R", - src_ts, dst_ts); - /* FALL */ - case ALREADY_DONE: - /* route exists, do not uninstall */ - route_entry_destroy(route); - break; - case SUCCESS: - /* cache the installed route */ - policy->route = route; - break; - } - } - - this->mutex->unlock(this->mutex); - - return SUCCESS; -} - -/** - * Implementation of kernel_interface_t.query_policy. - */ -static status_t query_policy(private_kernel_klips_ipsec_t *this, - traffic_selector_t *src_ts, - traffic_selector_t *dst_ts, - policy_dir_t direction, u_int32_t *use_time) -{ - #define IDLE_PREFIX "idle=" - static const char *path_eroute = "/proc/net/ipsec_eroute"; - static const char *path_spi = "/proc/net/ipsec_spi"; - FILE *file; - char line[1024], src[INET6_ADDRSTRLEN + 9], dst[INET6_ADDRSTRLEN + 9]; - char *said = NULL, *pos; - policy_entry_t *policy, *found = NULL; - status_t status = FAILED; - - if (direction == POLICY_FWD) - { - /* we do not install forward policies */ - return FAILED; - } - - DBG2(DBG_KNL, "querying policy %R === %R %N", src_ts, dst_ts, - policy_dir_names, direction); - - /* create a policy */ - policy = create_policy_entry(src_ts, dst_ts, direction); - - /* find a matching policy */ - this->mutex->lock(this->mutex); - if (this->policies->find_first(this->policies, - (linked_list_match_t)policy_entry_equals, (void**)&found, policy) != SUCCESS) - { - this->mutex->unlock(this->mutex); - DBG1(DBG_KNL, "querying policy %R === %R %N failed, not found", src_ts, - dst_ts, policy_dir_names, direction); - policy_entry_destroy(policy); - return NOT_FOUND; - } - policy_entry_destroy(policy); - policy = found; - - /* src and dst selectors in KLIPS are of the form NET_ADDR/NETBITS:PROTO */ - snprintf(src, sizeof(src), "%H/%d:%d", policy->src.net, policy->src.mask, - policy->src.proto); - src[sizeof(src) - 1] = '\0'; - snprintf(dst, sizeof(dst), "%H/%d:%d", policy->dst.net, policy->dst.mask, - policy->dst.proto); - dst[sizeof(dst) - 1] = '\0'; - - this->mutex->unlock(this->mutex); - - /* we try to find the matching eroute first */ - file = fopen(path_eroute, "r"); - if (file == NULL) - { - DBG1(DBG_KNL, "unable to query policy %R === %R %N: %s (%d)", src_ts, - dst_ts, policy_dir_names, direction, strerror(errno), errno); - return FAILED; - } - - /* read line by line where each line looks like: - * packets src -> dst => said */ - while (fgets(line, sizeof(line), file)) - { - enumerator_t *enumerator; - char *token; - int i = 0; - - enumerator = enumerator_create_token(line, " \t", " \t\n"); - while (enumerator->enumerate(enumerator, &token)) - { - switch (i++) - { - case 0: /* packets */ - continue; - case 1: /* src */ - if (streq(token, src)) - { - continue; - } - break; - case 2: /* -> */ - continue; - case 3: /* dst */ - if (streq(token, dst)) - { - continue; - } - break; - case 4: /* => */ - continue; - case 5: /* said */ - said = strdup(token); - break; - } - break; - } - enumerator->destroy(enumerator); - - if (i == 5) - { - /* eroute matched */ - break; - } - } - fclose(file); - - if (said == NULL) - { - DBG1(DBG_KNL, "unable to query policy %R === %R %N: found no matching" - " eroute", src_ts, dst_ts, policy_dir_names, direction); - return FAILED; - } - - /* compared with the one in the spi entry the SA ID from the eroute entry - * has an additional ":PROTO" appended, which we need to cut off */ - pos = strrchr(said, ':'); - *pos = '\0'; - - /* now we try to find the matching spi entry */ - file = fopen(path_spi, "r"); - if (file == NULL) - { - DBG1(DBG_KNL, "unable to query policy %R === %R %N: %s (%d)", src_ts, - dst_ts, policy_dir_names, direction, strerror(errno), errno); - return FAILED; - } - - while (fgets(line, sizeof(line), file)) - { - if (strneq(line, said, strlen(said))) - { - /* fine we found the correct line, now find the idle time */ - u_int32_t idle_time; - pos = strstr(line, IDLE_PREFIX); - if (pos == NULL) - { - /* no idle time, i.e. this SA has not been used yet */ - break; - } - if (sscanf(pos, IDLE_PREFIX"%u", &idle_time) <= 0) - { - /* idle time not valid */ - break; - } - - *use_time = time_monotonic(NULL) - idle_time; - status = SUCCESS; - break; - } - } - fclose(file); - free(said); - - return status; -} - -/** - * Implementation of kernel_interface_t.del_policy. - */ -static status_t del_policy(private_kernel_klips_ipsec_t *this, - traffic_selector_t *src_ts, - traffic_selector_t *dst_ts, - policy_dir_t direction, bool unrouted) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg = (struct sadb_msg*)request, *out; - policy_entry_t *policy, *found = NULL; - route_entry_t *route; - size_t len; - - if (direction == POLICY_FWD) - { - /* no forward policies for KLIPS */ - return SUCCESS; - } - - DBG2(DBG_KNL, "deleting policy %R === %R %N", src_ts, dst_ts, - policy_dir_names, direction); - - /* create a policy */ - policy = create_policy_entry(src_ts, dst_ts, direction); - - /* find a matching policy */ - this->mutex->lock(this->mutex); - if (this->policies->find_first(this->policies, - (linked_list_match_t)policy_entry_equals, (void**)&found, policy) != SUCCESS) - { - this->mutex->unlock(this->mutex); - DBG1(DBG_KNL, "deleting policy %R === %R %N failed, not found", src_ts, - dst_ts, policy_dir_names, direction); - policy_entry_destroy(policy); - return NOT_FOUND; - } - policy_entry_destroy(policy); - - /* decrease appropriate counter */ - unrouted ? found->trapcount-- : found->activecount--; - - if (found->trapcount == 0) - { - /* if this policy is finally unrouted, we reset the reqid because it - * may still be actively used and there might be a pending acquire for - * this policy. */ - found->reqid = 0; - } - - if (found->activecount > 0) - { - /* is still used by SAs, keep in kernel */ - this->mutex->unlock(this->mutex); - DBG2(DBG_KNL, "policy still used by another CHILD_SA, not removed"); - return SUCCESS; - } - else if (found->activecount == 0 && found->trapcount > 0) - { - /* for a policy that is not used actively anymore, but is still trapped - * by another child SA we replace the current eroute with a %trap eroute */ - DBG2(DBG_KNL, "policy still routed by another CHILD_SA, not removed"); - memset(&request, 0, sizeof(request)); - build_addflow(msg, SADB_X_SATYPE_INT, htonl(SPI_TRAP), NULL, NULL, - found->src.net, found->src.mask, found->dst.net, - found->dst.mask, found->src.proto, TRUE); - this->mutex->unlock(this->mutex); - return pfkey_send_ack(this, msg); - } - - /* remove if last reference */ - this->policies->remove(this->policies, found, NULL); - policy = found; - - this->mutex->unlock(this->mutex); - - memset(&request, 0, sizeof(request)); - - build_delflow(msg, 0, policy->src.net, policy->src.mask, policy->dst.net, - policy->dst.mask, policy->src.proto); - - route = policy->route; - policy->route = NULL; - policy_entry_destroy(policy); - - if (pfkey_send(this, msg, &out, &len) != SUCCESS) - { - DBG1(DBG_KNL, "unable to delete policy %R === %R %N", src_ts, dst_ts, - policy_dir_names, direction); - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "unable to delete policy %R === %R %N: %s (%d)", src_ts, - dst_ts, policy_dir_names, direction, - strerror(out->sadb_msg_errno), out->sadb_msg_errno); - free(out); - return FAILED; - } - free(out); - - if (route) - { - ipsec_dev_t *dev; - - 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); - } - - /* we have to detach the ipsec interface from the physical one over which - * this SA ran (if it is not used by any other) */ - this->mutex->lock(this->mutex); - - if (find_ipsec_dev(this, route->if_name, &dev) == SUCCESS) - { - /* fine, we found a matching device object, let's check if we have - * to detach it. */ - if (--dev->refcount == 0) - { - if (detach_ipsec_dev(dev->name, dev->phys_name) != SUCCESS) - { - DBG1(DBG_KNL, "failed to detach virtual interface %s" - " from %s", dev->name, dev->phys_name); - } - dev->phys_name[0] = '\0'; - } - } - - this->mutex->unlock(this->mutex); - - route_entry_destroy(route); - } - - return SUCCESS; -} - -/** - * Initialize the list of ipsec devices - */ -static void init_ipsec_devices(private_kernel_klips_ipsec_t *this) -{ - int i, count = lib->settings->get_int(lib->settings, - "charon.plugins.kernel-klips.ipsec_dev_count", - DEFAULT_IPSEC_DEV_COUNT); - - for (i = 0; i < count; ++i) - { - ipsec_dev_t *dev = malloc_thing(ipsec_dev_t); - snprintf(dev->name, IFNAMSIZ, IPSEC_DEV_PREFIX"%d", i); - dev->name[IFNAMSIZ - 1] = '\0'; - dev->phys_name[0] = '\0'; - dev->refcount = 0; - this->ipsec_devices->insert_last(this->ipsec_devices, dev); - - /* detach any previously attached ipsec device */ - detach_ipsec_dev(dev->name, dev->phys_name); - } -} - -/** - * Register a socket for AQUIRE/EXPIRE messages - */ -static status_t register_pfkey_socket(private_kernel_klips_ipsec_t *this, u_int8_t satype) -{ - unsigned char request[PFKEY_BUFFER_SIZE]; - struct sadb_msg *msg, *out; - size_t len; - - memset(&request, 0, sizeof(request)); - - msg = (struct sadb_msg*)request; - msg->sadb_msg_version = PF_KEY_V2; - msg->sadb_msg_type = SADB_REGISTER; - msg->sadb_msg_satype = satype; - msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg)); - - if (pfkey_send_socket(this, this->socket_events, msg, &out, &len) != SUCCESS) - { - DBG1(DBG_KNL, "unable to register PF_KEY socket"); - return FAILED; - } - else if (out->sadb_msg_errno) - { - DBG1(DBG_KNL, "unable to register PF_KEY socket: %s (%d)", - strerror(out->sadb_msg_errno), out->sadb_msg_errno); - free(out); - return FAILED; - } - free(out); - return SUCCESS; -} - -/** - * Implementation of kernel_interface_t.destroy. - */ -static void destroy(private_kernel_klips_ipsec_t *this) -{ - this->job->cancel(this->job); - close(this->socket); - close(this->socket_events); - this->mutex_pfkey->destroy(this->mutex_pfkey); - this->mutex->destroy(this->mutex); - this->ipsec_devices->destroy_function(this->ipsec_devices, (void*)ipsec_dev_destroy); - this->installed_sas->destroy_function(this->installed_sas, (void*)sa_entry_destroy); - this->allocated_spis->destroy_function(this->allocated_spis, (void*)sa_entry_destroy); - this->policies->destroy_function(this->policies, (void*)policy_entry_destroy); - free(this); -} - -/* - * Described in header. - */ -kernel_klips_ipsec_t *kernel_klips_ipsec_create() -{ - private_kernel_klips_ipsec_t *this = malloc_thing(private_kernel_klips_ipsec_t); - - /* public functions */ - this->public.interface.get_spi = (status_t(*)(kernel_ipsec_t*,host_t*,host_t*,protocol_id_t,u_int32_t,u_int32_t*))get_spi; - this->public.interface.get_cpi = (status_t(*)(kernel_ipsec_t*,host_t*,host_t*,u_int32_t,u_int16_t*))get_cpi; - this->public.interface.add_sa = (status_t(*)(kernel_ipsec_t *,host_t*,host_t*,u_int32_t,protocol_id_t,u_int32_t,lifetime_cfg_t*,u_int16_t,chunk_t,u_int16_t,chunk_t,ipsec_mode_t,u_int16_t,u_int16_t,bool,bool,traffic_selector_t*,traffic_selector_t*))add_sa; - this->public.interface.update_sa = (status_t(*)(kernel_ipsec_t*,u_int32_t,protocol_id_t,u_int16_t,host_t*,host_t*,host_t*,host_t*,bool,bool))update_sa; - this->public.interface.query_sa = (status_t(*)(kernel_ipsec_t*,host_t*,host_t*,u_int32_t,protocol_id_t,u_int64_t*))query_sa; - this->public.interface.del_sa = (status_t(*)(kernel_ipsec_t*,host_t*,host_t*,u_int32_t,protocol_id_t,u_int16_t))del_sa; - this->public.interface.add_policy = (status_t(*)(kernel_ipsec_t*,host_t*,host_t*,traffic_selector_t*,traffic_selector_t*,policy_dir_t,u_int32_t,protocol_id_t,u_int32_t,ipsec_mode_t,u_int16_t,u_int16_t,bool))add_policy; - this->public.interface.query_policy = (status_t(*)(kernel_ipsec_t*,traffic_selector_t*,traffic_selector_t*,policy_dir_t,u_int32_t*))query_policy; - this->public.interface.del_policy = (status_t(*)(kernel_ipsec_t*,traffic_selector_t*,traffic_selector_t*,policy_dir_t,bool))del_policy; - - this->public.interface.destroy = (void(*)(kernel_ipsec_t*)) destroy; - - /* private members */ - this->policies = linked_list_create(); - this->allocated_spis = linked_list_create(); - this->installed_sas = linked_list_create(); - this->ipsec_devices = linked_list_create(); - this->mutex = mutex_create(MUTEX_TYPE_DEFAULT); - this->mutex_pfkey = mutex_create(MUTEX_TYPE_DEFAULT); - this->install_routes = lib->settings->get_bool(lib->settings, "charon.install_routes", TRUE); - this->seq = 0; - - /* initialize ipsec devices */ - init_ipsec_devices(this); - - /* create a PF_KEY socket to communicate with the kernel */ - this->socket = socket(PF_KEY, SOCK_RAW, PF_KEY_V2); - if (this->socket <= 0) - { - charon->kill(charon, "unable to create PF_KEY socket"); - } - - /* create a PF_KEY socket for ACQUIRE & EXPIRE */ - this->socket_events = socket(PF_KEY, SOCK_RAW, PF_KEY_V2); - if (this->socket_events <= 0) - { - charon->kill(charon, "unable to create PF_KEY event socket"); - } - - /* register the event socket */ - if (register_pfkey_socket(this, SADB_SATYPE_ESP) != SUCCESS || - register_pfkey_socket(this, SADB_SATYPE_AH) != SUCCESS) - { - charon->kill(charon, "unable to register PF_KEY 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); - - return &this->public; -} diff --git a/src/charon/plugins/kernel_klips/kernel_klips_ipsec.h b/src/charon/plugins/kernel_klips/kernel_klips_ipsec.h deleted file mode 100644 index 306ec0ada..000000000 --- a/src/charon/plugins/kernel_klips/kernel_klips_ipsec.h +++ /dev/null @@ -1,46 +0,0 @@ -/* - * Copyright (C) 2008 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -/** - * @defgroup kernel_klips_ipsec_i kernel_klips_ipsec - * @{ @ingroup kernel_klips - */ - -#ifndef KERNEL_KLIPS_IPSEC_H_ -#define KERNEL_KLIPS_IPSEC_H_ - -#include <kernel/kernel_ipsec.h> - -typedef struct kernel_klips_ipsec_t kernel_klips_ipsec_t; - -/** - * Implementation of the kernel ipsec interface using PF_KEY. - */ -struct kernel_klips_ipsec_t { - - /** - * Implements kernel_ipsec_t interface - */ - kernel_ipsec_t interface; -}; - -/** - * Create a PF_KEY kernel ipsec interface instance. - * - * @return kernel_klips_ipsec_t instance - */ -kernel_klips_ipsec_t *kernel_klips_ipsec_create(); - -#endif /** KERNEL_KLIPS_IPSEC_H_ @}*/ diff --git a/src/charon/plugins/kernel_klips/kernel_klips_plugin.c b/src/charon/plugins/kernel_klips/kernel_klips_plugin.c deleted file mode 100644 index b0117c10c..000000000 --- a/src/charon/plugins/kernel_klips/kernel_klips_plugin.c +++ /dev/null @@ -1,56 +0,0 @@ -/* - * Copyright (C) 2008 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - - -#include "kernel_klips_plugin.h" - -#include "kernel_klips_ipsec.h" - -#include <daemon.h> - -typedef struct private_kernel_klips_plugin_t private_kernel_klips_plugin_t; - -/** - * private data of kernel PF_KEY plugin - */ -struct private_kernel_klips_plugin_t { - /** - * implements plugin interface - */ - kernel_klips_plugin_t public; -}; - -/** - * Implementation of plugin_t.destroy - */ -static void destroy(private_kernel_klips_plugin_t *this) -{ - charon->kernel_interface->remove_ipsec_interface(charon->kernel_interface, (kernel_ipsec_constructor_t)kernel_klips_ipsec_create); - free(this); -} - -/* - * see header file - */ -plugin_t *plugin_create() -{ - private_kernel_klips_plugin_t *this = malloc_thing(private_kernel_klips_plugin_t); - - this->public.plugin.destroy = (void(*)(plugin_t*))destroy; - - charon->kernel_interface->add_ipsec_interface(charon->kernel_interface, (kernel_ipsec_constructor_t)kernel_klips_ipsec_create); - - return &this->public.plugin; -} diff --git a/src/charon/plugins/kernel_klips/kernel_klips_plugin.h b/src/charon/plugins/kernel_klips/kernel_klips_plugin.h deleted file mode 100644 index 123550bf5..000000000 --- a/src/charon/plugins/kernel_klips/kernel_klips_plugin.h +++ /dev/null @@ -1,47 +0,0 @@ -/* - * Copyright (C) 2008 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -/** - * @defgroup kernel_klips kernel_klips - * @ingroup cplugins - * - * @defgroup kernel_klips_plugin kernel_klips_plugin - * @{ @ingroup kernel_klips - */ - -#ifndef KERNEL_KLIPS_PLUGIN_H_ -#define KERNEL_KLIPS_PLUGIN_H_ - -#include <plugins/plugin.h> - -typedef struct kernel_klips_plugin_t kernel_klips_plugin_t; - -/** - * PF_KEY kernel interface plugin - */ -struct kernel_klips_plugin_t { - - /** - * implements plugin interface - */ - plugin_t plugin; -}; - -/** - * Create a kernel_klips_plugin instance. - */ -plugin_t *plugin_create(); - -#endif /** KERNEL_KLIPS_PLUGIN_H_ @}*/ diff --git a/src/charon/plugins/kernel_klips/pfkeyv2.h b/src/charon/plugins/kernel_klips/pfkeyv2.h deleted file mode 100644 index 20d1c298d..000000000 --- a/src/charon/plugins/kernel_klips/pfkeyv2.h +++ /dev/null @@ -1,322 +0,0 @@ -/* -RFC 2367 PF_KEY Key Management API July 1998 - - -Appendix D: Sample Header File - -This file defines structures and symbols for the PF_KEY Version 2 -key management interface. It was written at the U.S. Naval Research -Laboratory. This file is in the public domain. The authors ask that -you leave this credit intact on any copies of this file. -*/ -#ifndef __PFKEY_V2_H -#define __PFKEY_V2_H 1 - -#define PF_KEY_V2 2 -#define PFKEYV2_REVISION 199806L - -#define SADB_RESERVED 0 -#define SADB_GETSPI 1 -#define SADB_UPDATE 2 -#define SADB_ADD 3 -#define SADB_DELETE 4 -#define SADB_GET 5 -#define SADB_ACQUIRE 6 -#define SADB_REGISTER 7 -#define SADB_EXPIRE 8 -#define SADB_FLUSH 9 -#define SADB_DUMP 10 -#define SADB_X_PROMISC 11 -#define SADB_X_PCHANGE 12 -#define SADB_X_GRPSA 13 -#define SADB_X_ADDFLOW 14 -#define SADB_X_DELFLOW 15 -#define SADB_X_DEBUG 16 -#define SADB_X_NAT_T_NEW_MAPPING 17 -#define SADB_MAX 17 - -struct sadb_msg { - uint8_t sadb_msg_version; - uint8_t sadb_msg_type; - uint8_t sadb_msg_errno; - uint8_t sadb_msg_satype; - uint16_t sadb_msg_len; - uint16_t sadb_msg_reserved; - uint32_t sadb_msg_seq; - uint32_t sadb_msg_pid; -}; - -struct sadb_ext { - uint16_t sadb_ext_len; - uint16_t sadb_ext_type; -}; - -struct sadb_sa { - uint16_t sadb_sa_len; - uint16_t sadb_sa_exttype; - uint32_t sadb_sa_spi; - uint8_t sadb_sa_replay; - uint8_t sadb_sa_state; - uint8_t sadb_sa_auth; - uint8_t sadb_sa_encrypt; - uint32_t sadb_sa_flags; -}; - -struct sadb_lifetime { - uint16_t sadb_lifetime_len; - uint16_t sadb_lifetime_exttype; - uint32_t sadb_lifetime_allocations; - uint64_t sadb_lifetime_bytes; - uint64_t sadb_lifetime_addtime; - uint64_t sadb_lifetime_usetime; - uint32_t sadb_x_lifetime_packets; - uint32_t sadb_x_lifetime_reserved; -}; - -struct sadb_address { - uint16_t sadb_address_len; - uint16_t sadb_address_exttype; - uint8_t sadb_address_proto; - uint8_t sadb_address_prefixlen; - uint16_t sadb_address_reserved; -}; - -struct sadb_key { - uint16_t sadb_key_len; - uint16_t sadb_key_exttype; - uint16_t sadb_key_bits; - uint16_t sadb_key_reserved; -}; - -struct sadb_ident { - uint16_t sadb_ident_len; - uint16_t sadb_ident_exttype; - uint16_t sadb_ident_type; - uint16_t sadb_ident_reserved; - uint64_t sadb_ident_id; -}; - -struct sadb_sens { - uint16_t sadb_sens_len; - uint16_t sadb_sens_exttype; - uint32_t sadb_sens_dpd; - uint8_t sadb_sens_sens_level; - uint8_t sadb_sens_sens_len; - uint8_t sadb_sens_integ_level; - uint8_t sadb_sens_integ_len; - uint32_t sadb_sens_reserved; -}; - -struct sadb_prop { - uint16_t sadb_prop_len; - uint16_t sadb_prop_exttype; - uint8_t sadb_prop_replay; - uint8_t sadb_prop_reserved[3]; -}; - -struct sadb_comb { - uint8_t sadb_comb_auth; - uint8_t sadb_comb_encrypt; - uint16_t sadb_comb_flags; - uint16_t sadb_comb_auth_minbits; - uint16_t sadb_comb_auth_maxbits; - uint16_t sadb_comb_encrypt_minbits; - uint16_t sadb_comb_encrypt_maxbits; - uint32_t sadb_comb_reserved; - uint32_t sadb_comb_soft_allocations; - uint32_t sadb_comb_hard_allocations; - uint64_t sadb_comb_soft_bytes; - uint64_t sadb_comb_hard_bytes; - uint64_t sadb_comb_soft_addtime; - uint64_t sadb_comb_hard_addtime; - uint64_t sadb_comb_soft_usetime; - uint64_t sadb_comb_hard_usetime; - uint32_t sadb_x_comb_soft_packets; - uint32_t sadb_x_comb_hard_packets; -}; - -struct sadb_supported { - uint16_t sadb_supported_len; - uint16_t sadb_supported_exttype; - uint32_t sadb_supported_reserved; -}; - -struct sadb_alg { - uint8_t sadb_alg_id; - uint8_t sadb_alg_ivlen; - uint16_t sadb_alg_minbits; - uint16_t sadb_alg_maxbits; - uint16_t sadb_alg_reserved; -}; - -struct sadb_spirange { - uint16_t sadb_spirange_len; - uint16_t sadb_spirange_exttype; - uint32_t sadb_spirange_min; - uint32_t sadb_spirange_max; - uint32_t sadb_spirange_reserved; -}; - -struct sadb_x_kmprivate { - uint16_t sadb_x_kmprivate_len; - uint16_t sadb_x_kmprivate_exttype; - uint32_t sadb_x_kmprivate_reserved; -}; - -struct sadb_x_satype { - uint16_t sadb_x_satype_len; - uint16_t sadb_x_satype_exttype; - uint8_t sadb_x_satype_satype; - uint8_t sadb_x_satype_reserved[3]; -}; - -struct sadb_x_debug { - uint16_t sadb_x_debug_len; - uint16_t sadb_x_debug_exttype; - uint32_t sadb_x_debug_tunnel; - uint32_t sadb_x_debug_netlink; - uint32_t sadb_x_debug_xform; - uint32_t sadb_x_debug_eroute; - uint32_t sadb_x_debug_spi; - uint32_t sadb_x_debug_radij; - uint32_t sadb_x_debug_esp; - uint32_t sadb_x_debug_ah; - uint32_t sadb_x_debug_rcv; - uint32_t sadb_x_debug_pfkey; - uint32_t sadb_x_debug_ipcomp; - uint32_t sadb_x_debug_verbose; - uint8_t sadb_x_debug_reserved[4]; -}; - -struct sadb_x_nat_t_type { - uint16_t sadb_x_nat_t_type_len; - uint16_t sadb_x_nat_t_type_exttype; - uint8_t sadb_x_nat_t_type_type; - uint8_t sadb_x_nat_t_type_reserved[3]; -}; -struct sadb_x_nat_t_port { - uint16_t sadb_x_nat_t_port_len; - uint16_t sadb_x_nat_t_port_exttype; - uint16_t sadb_x_nat_t_port_port; - uint16_t sadb_x_nat_t_port_reserved; -}; - -/* - * A protocol structure for passing through the transport level - * protocol. It contains more fields than are actually used/needed - * but it is this way to be compatible with the structure used in - * OpenBSD (http://www.openbsd.org/cgi-bin/cvsweb/src/sys/net/pfkeyv2.h) - */ -struct sadb_protocol { - uint16_t sadb_protocol_len; - uint16_t sadb_protocol_exttype; - uint8_t sadb_protocol_proto; - uint8_t sadb_protocol_direction; - uint8_t sadb_protocol_flags; - uint8_t sadb_protocol_reserved2; -}; - -#define SADB_EXT_RESERVED 0 -#define SADB_EXT_SA 1 -#define SADB_EXT_LIFETIME_CURRENT 2 -#define SADB_EXT_LIFETIME_HARD 3 -#define SADB_EXT_LIFETIME_SOFT 4 -#define SADB_EXT_ADDRESS_SRC 5 -#define SADB_EXT_ADDRESS_DST 6 -#define SADB_EXT_ADDRESS_PROXY 7 -#define SADB_EXT_KEY_AUTH 8 -#define SADB_EXT_KEY_ENCRYPT 9 -#define SADB_EXT_IDENTITY_SRC 10 -#define SADB_EXT_IDENTITY_DST 11 -#define SADB_EXT_SENSITIVITY 12 -#define SADB_EXT_PROPOSAL 13 -#define SADB_EXT_SUPPORTED_AUTH 14 -#define SADB_EXT_SUPPORTED_ENCRYPT 15 -#define SADB_EXT_SPIRANGE 16 -#define SADB_X_EXT_KMPRIVATE 17 -#define SADB_X_EXT_SATYPE2 18 -#define SADB_X_EXT_SA2 19 -#define SADB_X_EXT_ADDRESS_DST2 20 -#define SADB_X_EXT_ADDRESS_SRC_FLOW 21 -#define SADB_X_EXT_ADDRESS_DST_FLOW 22 -#define SADB_X_EXT_ADDRESS_SRC_MASK 23 -#define SADB_X_EXT_ADDRESS_DST_MASK 24 -#define SADB_X_EXT_DEBUG 25 -#define SADB_X_EXT_PROTOCOL 26 -#define SADB_X_EXT_NAT_T_TYPE 27 -#define SADB_X_EXT_NAT_T_SPORT 28 -#define SADB_X_EXT_NAT_T_DPORT 29 -#define SADB_X_EXT_NAT_T_OA 30 -#define SADB_EXT_MAX 30 - -/* SADB_X_DELFLOW required over and above SADB_X_SAFLAGS_CLEARFLOW */ -#define SADB_X_EXT_ADDRESS_DELFLOW \ - ( (1<<SADB_X_EXT_ADDRESS_SRC_FLOW) \ - | (1<<SADB_X_EXT_ADDRESS_DST_FLOW) \ - | (1<<SADB_X_EXT_ADDRESS_SRC_MASK) \ - | (1<<SADB_X_EXT_ADDRESS_DST_MASK)) - -#define SADB_SATYPE_UNSPEC 0 -#define SADB_SATYPE_AH 2 -#define SADB_SATYPE_ESP 3 -#define SADB_SATYPE_RSVP 5 -#define SADB_SATYPE_OSPFV2 6 -#define SADB_SATYPE_RIPV2 7 -#define SADB_SATYPE_MIP 8 -#define SADB_X_SATYPE_IPIP 9 -#define SADB_X_SATYPE_COMP 10 -#define SADB_X_SATYPE_INT 11 -#define SADB_SATYPE_MAX 11 - -#define SADB_SASTATE_LARVAL 0 -#define SADB_SASTATE_MATURE 1 -#define SADB_SASTATE_DYING 2 -#define SADB_SASTATE_DEAD 3 -#define SADB_SASTATE_MAX 3 - -#define SADB_SAFLAGS_PFS 1 -#define SADB_X_SAFLAGS_REPLACEFLOW 2 -#define SADB_X_SAFLAGS_CLEARFLOW 4 -#define SADB_X_SAFLAGS_INFLOW 8 - -#define SADB_AALG_NONE 0 -#define SADB_AALG_MD5HMAC 2 -#define SADB_AALG_SHA1HMAC 3 -#define SADB_AALG_SHA256_HMAC 5 -#define SADB_AALG_SHA384_HMAC 6 -#define SADB_AALG_SHA512_HMAC 7 -#define SADB_AALG_RIPEMD160HMAC 8 -#define SADB_AALG_MAX 15 - -#define SADB_EALG_NONE 0 -#define SADB_EALG_DESCBC 2 -#define SADB_EALG_3DESCBC 3 -#define SADB_EALG_BFCBC 7 -#define SADB_EALG_NULL 11 -#define SADB_EALG_AESCBC 12 -#define SADB_EALG_MAX 255 - -#define SADB_X_CALG_NONE 0 -#define SADB_X_CALG_OUI 1 -#define SADB_X_CALG_DEFLATE 2 -#define SADB_X_CALG_LZS 3 -#define SADB_X_CALG_V42BIS 4 -#define SADB_X_CALG_MAX 4 - -#define SADB_X_TALG_NONE 0 -#define SADB_X_TALG_IPv4_in_IPv4 1 -#define SADB_X_TALG_IPv6_in_IPv4 2 -#define SADB_X_TALG_IPv4_in_IPv6 3 -#define SADB_X_TALG_IPv6_in_IPv6 4 -#define SADB_X_TALG_MAX 4 - - -#define SADB_IDENTTYPE_RESERVED 0 -#define SADB_IDENTTYPE_PREFIX 1 -#define SADB_IDENTTYPE_FQDN 2 -#define SADB_IDENTTYPE_USERFQDN 3 -#define SADB_X_IDENTTYPE_CONNECTION 4 -#define SADB_IDENTTYPE_MAX 4 - -#define SADB_KEY_FLAGS_MAX 0 -#endif /* __PFKEY_V2_H */ |