2 * net/key/af_key.c An implementation of PF_KEYv2 sockets.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
9 * Authors: Maxim Giryaev <gem@asplinux.ru>
10 * David S. Miller <davem@redhat.com>
11 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
12 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
14 * Derek Atkins <derek@ihtfp.com>
17 #include <linux/capability.h>
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/socket.h>
21 #include <linux/pfkeyv2.h>
22 #include <linux/ipsec.h>
23 #include <linux/skbuff.h>
24 #include <linux/rtnetlink.h>
26 #include <linux/in6.h>
27 #include <linux/proc_fs.h>
28 #include <linux/init.h>
29 #include <linux/slab.h>
30 #include <net/net_namespace.h>
31 #include <net/netns/generic.h>
36 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
37 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
39 static int pfkey_net_id __read_mostly;
41 /* List of all pfkey sockets. */
42 struct hlist_head table;
45 static DEFINE_MUTEX(pfkey_mutex);
48 static struct xfrm_mark dummy_mark = {0, 0};
50 /* struct sock must be the first member of struct pfkey_sock */
58 int (*dump)(struct pfkey_sock *sk);
59 void (*done)(struct pfkey_sock *sk);
61 struct xfrm_policy_walk policy;
62 struct xfrm_state_walk state;
66 struct mutex dump_lock;
69 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
71 return (struct pfkey_sock *)sk;
74 static int pfkey_can_dump(const struct sock *sk)
76 if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
81 static void pfkey_terminate_dump(struct pfkey_sock *pfk)
85 kfree_skb(pfk->dump.skb);
89 pfk->dump.dump = NULL;
90 pfk->dump.done = NULL;
94 static void pfkey_sock_destruct(struct sock *sk)
96 struct net *net = sock_net(sk);
97 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
99 pfkey_terminate_dump(pfkey_sk(sk));
100 skb_queue_purge(&sk->sk_receive_queue);
102 if (!sock_flag(sk, SOCK_DEAD)) {
103 pr_err("Attempt to release alive pfkey socket: %p\n", sk);
107 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
108 WARN_ON(atomic_read(&sk->sk_wmem_alloc));
110 atomic_dec(&net_pfkey->socks_nr);
113 static const struct proto_ops pfkey_ops;
115 static void pfkey_insert(struct sock *sk)
117 struct net *net = sock_net(sk);
118 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
120 mutex_lock(&pfkey_mutex);
121 sk_add_node_rcu(sk, &net_pfkey->table);
122 mutex_unlock(&pfkey_mutex);
125 static void pfkey_remove(struct sock *sk)
127 mutex_lock(&pfkey_mutex);
128 sk_del_node_init_rcu(sk);
129 mutex_unlock(&pfkey_mutex);
132 static struct proto key_proto = {
134 .owner = THIS_MODULE,
135 .obj_size = sizeof(struct pfkey_sock),
138 static int pfkey_create(struct net *net, struct socket *sock, int protocol,
141 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
143 struct pfkey_sock *pfk;
146 if (!capable(CAP_NET_ADMIN))
148 if (sock->type != SOCK_RAW)
149 return -ESOCKTNOSUPPORT;
150 if (protocol != PF_KEY_V2)
151 return -EPROTONOSUPPORT;
154 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
159 mutex_init(&pfk->dump_lock);
161 sock->ops = &pfkey_ops;
162 sock_init_data(sock, sk);
164 sk->sk_family = PF_KEY;
165 sk->sk_destruct = pfkey_sock_destruct;
167 atomic_inc(&net_pfkey->socks_nr);
176 static int pfkey_release(struct socket *sock)
178 struct sock *sk = sock->sk;
187 skb_queue_purge(&sk->sk_write_queue);
195 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
196 gfp_t allocation, struct sock *sk)
202 if (atomic_read(&skb->users) != 1) {
203 *skb2 = skb_clone(skb, allocation);
206 atomic_inc(&skb->users);
210 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
212 skb_set_owner_r(*skb2, sk);
213 skb_queue_tail(&sk->sk_receive_queue, *skb2);
214 sk->sk_data_ready(sk, (*skb2)->len);
223 /* Send SKB to all pfkey sockets matching selected criteria. */
224 #define BROADCAST_ALL 0
225 #define BROADCAST_ONE 1
226 #define BROADCAST_REGISTERED 2
227 #define BROADCAST_PROMISC_ONLY 4
228 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
229 int broadcast_flags, struct sock *one_sk,
232 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
234 struct hlist_node *node;
235 struct sk_buff *skb2 = NULL;
238 /* XXX Do we need something like netlink_overrun? I think
239 * XXX PF_KEY socket apps will not mind current behavior.
245 sk_for_each_rcu(sk, node, &net_pfkey->table) {
246 struct pfkey_sock *pfk = pfkey_sk(sk);
249 /* Yes, it means that if you are meant to receive this
250 * pfkey message you receive it twice as promiscuous
254 pfkey_broadcast_one(skb, &skb2, GFP_ATOMIC, sk);
256 /* the exact target will be processed later */
259 if (broadcast_flags != BROADCAST_ALL) {
260 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
262 if ((broadcast_flags & BROADCAST_REGISTERED) &&
265 if (broadcast_flags & BROADCAST_ONE)
269 err2 = pfkey_broadcast_one(skb, &skb2, GFP_ATOMIC, sk);
271 /* Error is cleare after succecful sending to at least one
273 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
279 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
286 static int pfkey_do_dump(struct pfkey_sock *pfk)
288 struct sadb_msg *hdr;
291 mutex_lock(&pfk->dump_lock);
292 if (!pfk->dump.dump) {
297 rc = pfk->dump.dump(pfk);
298 if (rc == -ENOBUFS) {
304 if (!pfkey_can_dump(&pfk->sk)) {
309 hdr = (struct sadb_msg *) pfk->dump.skb->data;
310 hdr->sadb_msg_seq = 0;
311 hdr->sadb_msg_errno = rc;
312 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
313 &pfk->sk, sock_net(&pfk->sk));
314 pfk->dump.skb = NULL;
317 pfkey_terminate_dump(pfk);
320 mutex_unlock(&pfk->dump_lock);
324 static inline void pfkey_hdr_dup(struct sadb_msg *new,
325 const struct sadb_msg *orig)
330 static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk)
332 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
333 struct sadb_msg *hdr;
338 /* Woe be to the platform trying to support PFKEY yet
339 * having normal errnos outside the 1-255 range, inclusive.
342 if (err == ERESTARTSYS ||
343 err == ERESTARTNOHAND ||
344 err == ERESTARTNOINTR)
348 BUG_ON(err <= 0 || err >= 256);
350 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
351 pfkey_hdr_dup(hdr, orig);
352 hdr->sadb_msg_errno = (uint8_t) err;
353 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
356 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk));
361 static u8 sadb_ext_min_len[] = {
362 [SADB_EXT_RESERVED] = (u8) 0,
363 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
364 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
365 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
366 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
367 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
368 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
369 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
370 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
371 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
372 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
373 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
374 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
375 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
376 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
377 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
378 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
379 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
380 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
381 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
382 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
383 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
384 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
385 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
386 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
387 [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress),
390 /* Verify sadb_address_{len,prefixlen} against sa_family. */
391 static int verify_address_len(const void *p)
393 const struct sadb_address *sp = p;
394 const struct sockaddr *addr = (const struct sockaddr *)(sp + 1);
395 const struct sockaddr_in *sin;
396 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
397 const struct sockaddr_in6 *sin6;
401 switch (addr->sa_family) {
403 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
404 if (sp->sadb_address_len != len ||
405 sp->sadb_address_prefixlen > 32)
408 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
410 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
411 if (sp->sadb_address_len != len ||
412 sp->sadb_address_prefixlen > 128)
417 /* It is user using kernel to keep track of security
418 * associations for another protocol, such as
419 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
422 * XXX Actually, association/policy database is not yet
423 * XXX able to cope with arbitrary sockaddr families.
424 * XXX When it can, remove this -EINVAL. -DaveM
433 static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx)
435 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
436 sec_ctx->sadb_x_ctx_len,
440 static inline int verify_sec_ctx_len(const void *p)
442 const struct sadb_x_sec_ctx *sec_ctx = p;
443 int len = sec_ctx->sadb_x_ctx_len;
448 len = pfkey_sec_ctx_len(sec_ctx);
450 if (sec_ctx->sadb_x_sec_len != len)
456 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx)
458 struct xfrm_user_sec_ctx *uctx = NULL;
459 int ctx_size = sec_ctx->sadb_x_ctx_len;
461 uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
466 uctx->len = pfkey_sec_ctx_len(sec_ctx);
467 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
468 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
469 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
470 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
471 memcpy(uctx + 1, sec_ctx + 1,
477 static int present_and_same_family(const struct sadb_address *src,
478 const struct sadb_address *dst)
480 const struct sockaddr *s_addr, *d_addr;
485 s_addr = (const struct sockaddr *)(src + 1);
486 d_addr = (const struct sockaddr *)(dst + 1);
487 if (s_addr->sa_family != d_addr->sa_family)
489 if (s_addr->sa_family != AF_INET
490 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
491 && s_addr->sa_family != AF_INET6
499 static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs)
501 const char *p = (char *) hdr;
507 const struct sadb_ext *ehdr = (const struct sadb_ext *) p;
511 ext_len = ehdr->sadb_ext_len;
512 ext_len *= sizeof(uint64_t);
513 ext_type = ehdr->sadb_ext_type;
514 if (ext_len < sizeof(uint64_t) ||
516 ext_type == SADB_EXT_RESERVED)
519 if (ext_type <= SADB_EXT_MAX) {
520 int min = (int) sadb_ext_min_len[ext_type];
523 if (ext_hdrs[ext_type-1] != NULL)
525 if (ext_type == SADB_EXT_ADDRESS_SRC ||
526 ext_type == SADB_EXT_ADDRESS_DST ||
527 ext_type == SADB_EXT_ADDRESS_PROXY ||
528 ext_type == SADB_X_EXT_NAT_T_OA) {
529 if (verify_address_len(p))
532 if (ext_type == SADB_X_EXT_SEC_CTX) {
533 if (verify_sec_ctx_len(p))
536 ext_hdrs[ext_type-1] = (void *) p;
546 pfkey_satype2proto(uint8_t satype)
549 case SADB_SATYPE_UNSPEC:
550 return IPSEC_PROTO_ANY;
553 case SADB_SATYPE_ESP:
555 case SADB_X_SATYPE_IPCOMP:
565 pfkey_proto2satype(uint16_t proto)
569 return SADB_SATYPE_AH;
571 return SADB_SATYPE_ESP;
573 return SADB_X_SATYPE_IPCOMP;
581 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
582 * say specifically 'just raw sockets' as we encode them as 255.
585 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
587 return proto == IPSEC_PROTO_ANY ? 0 : proto;
590 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
592 return proto ? proto : IPSEC_PROTO_ANY;
595 static inline int pfkey_sockaddr_len(sa_family_t family)
599 return sizeof(struct sockaddr_in);
600 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
602 return sizeof(struct sockaddr_in6);
609 int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
611 switch (sa->sa_family) {
614 ((struct sockaddr_in *)sa)->sin_addr.s_addr;
616 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
619 &((struct sockaddr_in6 *)sa)->sin6_addr,
620 sizeof(struct in6_addr));
628 int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr)
630 return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
634 static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs)
636 const struct sadb_sa *sa;
637 const struct sadb_address *addr;
639 unsigned short family;
640 xfrm_address_t *xaddr;
642 sa = ext_hdrs[SADB_EXT_SA - 1];
646 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
650 /* sadb_address_len should be checked by caller */
651 addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
655 family = ((const struct sockaddr *)(addr + 1))->sa_family;
658 xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr;
660 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
662 xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr;
672 return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family);
675 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
678 pfkey_sockaddr_size(sa_family_t family)
680 return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
683 static inline int pfkey_mode_from_xfrm(int mode)
686 case XFRM_MODE_TRANSPORT:
687 return IPSEC_MODE_TRANSPORT;
688 case XFRM_MODE_TUNNEL:
689 return IPSEC_MODE_TUNNEL;
691 return IPSEC_MODE_BEET;
697 static inline int pfkey_mode_to_xfrm(int mode)
700 case IPSEC_MODE_ANY: /*XXX*/
701 case IPSEC_MODE_TRANSPORT:
702 return XFRM_MODE_TRANSPORT;
703 case IPSEC_MODE_TUNNEL:
704 return XFRM_MODE_TUNNEL;
705 case IPSEC_MODE_BEET:
706 return XFRM_MODE_BEET;
712 static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port,
714 unsigned short family)
719 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
720 sin->sin_family = AF_INET;
721 sin->sin_port = port;
722 sin->sin_addr.s_addr = xaddr->a4;
723 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
726 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
729 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
730 sin6->sin6_family = AF_INET6;
731 sin6->sin6_port = port;
732 sin6->sin6_flowinfo = 0;
733 ipv6_addr_copy(&sin6->sin6_addr, (const struct in6_addr *)xaddr->a6);
734 sin6->sin6_scope_id = 0;
742 static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x,
743 int add_keys, int hsc)
746 struct sadb_msg *hdr;
748 struct sadb_lifetime *lifetime;
749 struct sadb_address *addr;
750 struct sadb_key *key;
751 struct sadb_x_sa2 *sa2;
752 struct sadb_x_sec_ctx *sec_ctx;
753 struct xfrm_sec_ctx *xfrm_ctx;
756 int auth_key_size = 0;
757 int encrypt_key_size = 0;
759 struct xfrm_encap_tmpl *natt = NULL;
762 /* address family check */
763 sockaddr_size = pfkey_sockaddr_size(x->props.family);
765 return ERR_PTR(-EINVAL);
767 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
768 key(AE), (identity(SD),) (sensitivity)> */
769 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
770 sizeof(struct sadb_lifetime) +
771 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
772 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
773 sizeof(struct sadb_address)*2 +
775 sizeof(struct sadb_x_sa2);
777 if ((xfrm_ctx = x->security)) {
778 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
779 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
782 /* identity & sensitivity */
783 if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, x->props.family))
784 size += sizeof(struct sadb_address) + sockaddr_size;
787 if (x->aalg && x->aalg->alg_key_len) {
789 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
790 size += sizeof(struct sadb_key) + auth_key_size;
792 if (x->ealg && x->ealg->alg_key_len) {
794 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
795 size += sizeof(struct sadb_key) + encrypt_key_size;
801 if (natt && natt->encap_type) {
802 size += sizeof(struct sadb_x_nat_t_type);
803 size += sizeof(struct sadb_x_nat_t_port);
804 size += sizeof(struct sadb_x_nat_t_port);
807 skb = alloc_skb(size + 16, GFP_ATOMIC);
809 return ERR_PTR(-ENOBUFS);
811 /* call should fill header later */
812 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
813 memset(hdr, 0, size); /* XXX do we need this ? */
814 hdr->sadb_msg_len = size / sizeof(uint64_t);
817 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
818 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
819 sa->sadb_sa_exttype = SADB_EXT_SA;
820 sa->sadb_sa_spi = x->id.spi;
821 sa->sadb_sa_replay = x->props.replay_window;
822 switch (x->km.state) {
823 case XFRM_STATE_VALID:
824 sa->sadb_sa_state = x->km.dying ?
825 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
828 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
831 sa->sadb_sa_state = SADB_SASTATE_DEAD;
834 sa->sadb_sa_auth = 0;
836 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
837 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
839 sa->sadb_sa_encrypt = 0;
840 BUG_ON(x->ealg && x->calg);
842 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
843 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
845 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
847 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
848 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
851 sa->sadb_sa_flags = 0;
852 if (x->props.flags & XFRM_STATE_NOECN)
853 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
854 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
855 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
856 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
857 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
861 lifetime = (struct sadb_lifetime *) skb_put(skb,
862 sizeof(struct sadb_lifetime));
863 lifetime->sadb_lifetime_len =
864 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
865 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
866 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
867 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
868 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
869 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
873 lifetime = (struct sadb_lifetime *) skb_put(skb,
874 sizeof(struct sadb_lifetime));
875 lifetime->sadb_lifetime_len =
876 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
877 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
878 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
879 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
880 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
881 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
884 lifetime = (struct sadb_lifetime *) skb_put(skb,
885 sizeof(struct sadb_lifetime));
886 lifetime->sadb_lifetime_len =
887 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
888 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
889 lifetime->sadb_lifetime_allocations = x->curlft.packets;
890 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
891 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
892 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
894 addr = (struct sadb_address*) skb_put(skb,
895 sizeof(struct sadb_address)+sockaddr_size);
896 addr->sadb_address_len =
897 (sizeof(struct sadb_address)+sockaddr_size)/
899 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
900 /* "if the ports are non-zero, then the sadb_address_proto field,
901 normally zero, MUST be filled in with the transport
902 protocol's number." - RFC2367 */
903 addr->sadb_address_proto = 0;
904 addr->sadb_address_reserved = 0;
906 addr->sadb_address_prefixlen =
907 pfkey_sockaddr_fill(&x->props.saddr, 0,
908 (struct sockaddr *) (addr + 1),
910 if (!addr->sadb_address_prefixlen)
914 addr = (struct sadb_address*) skb_put(skb,
915 sizeof(struct sadb_address)+sockaddr_size);
916 addr->sadb_address_len =
917 (sizeof(struct sadb_address)+sockaddr_size)/
919 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
920 addr->sadb_address_proto = 0;
921 addr->sadb_address_reserved = 0;
923 addr->sadb_address_prefixlen =
924 pfkey_sockaddr_fill(&x->id.daddr, 0,
925 (struct sockaddr *) (addr + 1),
927 if (!addr->sadb_address_prefixlen)
930 if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr,
932 addr = (struct sadb_address*) skb_put(skb,
933 sizeof(struct sadb_address)+sockaddr_size);
934 addr->sadb_address_len =
935 (sizeof(struct sadb_address)+sockaddr_size)/
937 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
938 addr->sadb_address_proto =
939 pfkey_proto_from_xfrm(x->sel.proto);
940 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
941 addr->sadb_address_reserved = 0;
943 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
944 (struct sockaddr *) (addr + 1),
949 if (add_keys && auth_key_size) {
950 key = (struct sadb_key *) skb_put(skb,
951 sizeof(struct sadb_key)+auth_key_size);
952 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
954 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
955 key->sadb_key_bits = x->aalg->alg_key_len;
956 key->sadb_key_reserved = 0;
957 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
960 if (add_keys && encrypt_key_size) {
961 key = (struct sadb_key *) skb_put(skb,
962 sizeof(struct sadb_key)+encrypt_key_size);
963 key->sadb_key_len = (sizeof(struct sadb_key) +
964 encrypt_key_size) / sizeof(uint64_t);
965 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
966 key->sadb_key_bits = x->ealg->alg_key_len;
967 key->sadb_key_reserved = 0;
968 memcpy(key + 1, x->ealg->alg_key,
969 (x->ealg->alg_key_len+7)/8);
973 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
974 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
975 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
976 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
978 return ERR_PTR(-EINVAL);
980 sa2->sadb_x_sa2_mode = mode;
981 sa2->sadb_x_sa2_reserved1 = 0;
982 sa2->sadb_x_sa2_reserved2 = 0;
983 sa2->sadb_x_sa2_sequence = 0;
984 sa2->sadb_x_sa2_reqid = x->props.reqid;
986 if (natt && natt->encap_type) {
987 struct sadb_x_nat_t_type *n_type;
988 struct sadb_x_nat_t_port *n_port;
991 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
992 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
993 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
994 n_type->sadb_x_nat_t_type_type = natt->encap_type;
995 n_type->sadb_x_nat_t_type_reserved[0] = 0;
996 n_type->sadb_x_nat_t_type_reserved[1] = 0;
997 n_type->sadb_x_nat_t_type_reserved[2] = 0;
1000 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
1001 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1002 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
1003 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
1004 n_port->sadb_x_nat_t_port_reserved = 0;
1007 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
1008 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1009 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
1010 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
1011 n_port->sadb_x_nat_t_port_reserved = 0;
1014 /* security context */
1016 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
1017 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1018 sec_ctx->sadb_x_sec_len =
1019 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1020 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1021 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1022 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1023 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1024 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1032 static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x)
1034 struct sk_buff *skb;
1036 skb = __pfkey_xfrm_state2msg(x, 1, 3);
1041 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x,
1044 return __pfkey_xfrm_state2msg(x, 0, hsc);
1047 static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
1048 const struct sadb_msg *hdr,
1049 void * const *ext_hdrs)
1051 struct xfrm_state *x;
1052 const struct sadb_lifetime *lifetime;
1053 const struct sadb_sa *sa;
1054 const struct sadb_key *key;
1055 const struct sadb_x_sec_ctx *sec_ctx;
1060 sa = ext_hdrs[SADB_EXT_SA - 1];
1062 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1063 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1064 return ERR_PTR(-EINVAL);
1065 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1066 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1067 return ERR_PTR(-EINVAL);
1068 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1069 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1070 return ERR_PTR(-EINVAL);
1071 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1072 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1073 return ERR_PTR(-EINVAL);
1075 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1077 return ERR_PTR(-EINVAL);
1079 /* default error is no buffer space */
1084 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1085 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1086 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1087 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1088 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1091 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1092 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1094 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1095 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1096 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1097 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1098 return ERR_PTR(-EINVAL);
1099 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1101 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1102 ((key->sadb_key_bits+7) / 8 == 0 ||
1103 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1104 return ERR_PTR(-EINVAL);
1105 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1107 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1108 ((key->sadb_key_bits+7) / 8 == 0 ||
1109 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1110 return ERR_PTR(-EINVAL);
1112 x = xfrm_state_alloc(net);
1114 return ERR_PTR(-ENOBUFS);
1116 x->id.proto = proto;
1117 x->id.spi = sa->sadb_sa_spi;
1118 x->props.replay_window = sa->sadb_sa_replay;
1119 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1120 x->props.flags |= XFRM_STATE_NOECN;
1121 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1122 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1123 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1124 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1126 lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1];
1127 if (lifetime != NULL) {
1128 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1129 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1130 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1131 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1133 lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1];
1134 if (lifetime != NULL) {
1135 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1136 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1137 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1138 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1141 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
1142 if (sec_ctx != NULL) {
1143 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1148 err = security_xfrm_state_alloc(x, uctx);
1156 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1157 if (sa->sadb_sa_auth) {
1159 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1165 keysize = (key->sadb_key_bits + 7) / 8;
1166 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1171 strcpy(x->aalg->alg_name, a->name);
1172 x->aalg->alg_key_len = 0;
1174 x->aalg->alg_key_len = key->sadb_key_bits;
1175 memcpy(x->aalg->alg_key, key+1, keysize);
1177 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1178 x->props.aalgo = sa->sadb_sa_auth;
1179 /* x->algo.flags = sa->sadb_sa_flags; */
1181 if (sa->sadb_sa_encrypt) {
1182 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1183 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1188 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1193 strcpy(x->calg->alg_name, a->name);
1194 x->props.calgo = sa->sadb_sa_encrypt;
1197 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1202 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1204 keysize = (key->sadb_key_bits + 7) / 8;
1205 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1210 strcpy(x->ealg->alg_name, a->name);
1211 x->ealg->alg_key_len = 0;
1213 x->ealg->alg_key_len = key->sadb_key_bits;
1214 memcpy(x->ealg->alg_key, key+1, keysize);
1216 x->props.ealgo = sa->sadb_sa_encrypt;
1219 /* x->algo.flags = sa->sadb_sa_flags; */
1221 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1223 if (!x->props.family) {
1224 err = -EAFNOSUPPORT;
1227 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1230 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1231 const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
1232 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1237 x->props.mode = mode;
1238 x->props.reqid = sa2->sadb_x_sa2_reqid;
1241 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1242 const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1244 /* Nobody uses this, but we try. */
1245 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1246 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1250 x->sel.family = x->props.family;
1252 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1253 const struct sadb_x_nat_t_type* n_type;
1254 struct xfrm_encap_tmpl *natt;
1256 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1263 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1264 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1266 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1267 const struct sadb_x_nat_t_port *n_port =
1268 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1269 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1271 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1272 const struct sadb_x_nat_t_port *n_port =
1273 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1274 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1276 memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
1279 err = xfrm_init_state(x);
1283 x->km.seq = hdr->sadb_msg_seq;
1287 x->km.state = XFRM_STATE_DEAD;
1289 return ERR_PTR(err);
1292 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1297 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1299 struct net *net = sock_net(sk);
1300 struct sk_buff *resp_skb;
1301 struct sadb_x_sa2 *sa2;
1302 struct sadb_address *saddr, *daddr;
1303 struct sadb_msg *out_hdr;
1304 struct sadb_spirange *range;
1305 struct xfrm_state *x = NULL;
1308 u32 min_spi, max_spi;
1311 unsigned short family;
1312 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1314 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1315 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1318 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1322 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1323 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1326 reqid = sa2->sadb_x_sa2_reqid;
1332 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1333 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1335 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1338 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1339 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1341 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1343 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1344 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1349 if (hdr->sadb_msg_seq) {
1350 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1351 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1358 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family);
1364 max_spi = 0x0fffffff;
1366 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1368 min_spi = range->sadb_spirange_min;
1369 max_spi = range->sadb_spirange_max;
1372 err = xfrm_alloc_spi(x, min_spi, max_spi);
1373 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1375 if (IS_ERR(resp_skb)) {
1377 return PTR_ERR(resp_skb);
1380 out_hdr = (struct sadb_msg *) resp_skb->data;
1381 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1382 out_hdr->sadb_msg_type = SADB_GETSPI;
1383 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1384 out_hdr->sadb_msg_errno = 0;
1385 out_hdr->sadb_msg_reserved = 0;
1386 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1387 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1391 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
1396 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1398 struct net *net = sock_net(sk);
1399 struct xfrm_state *x;
1401 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1404 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1407 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1411 spin_lock_bh(&x->lock);
1412 if (x->km.state == XFRM_STATE_ACQ) {
1413 x->km.state = XFRM_STATE_ERROR;
1414 wake_up(&net->xfrm.km_waitq);
1416 spin_unlock_bh(&x->lock);
1421 static inline int event2poltype(int event)
1424 case XFRM_MSG_DELPOLICY:
1425 return SADB_X_SPDDELETE;
1426 case XFRM_MSG_NEWPOLICY:
1427 return SADB_X_SPDADD;
1428 case XFRM_MSG_UPDPOLICY:
1429 return SADB_X_SPDUPDATE;
1430 case XFRM_MSG_POLEXPIRE:
1431 // return SADB_X_SPDEXPIRE;
1433 pr_err("pfkey: Unknown policy event %d\n", event);
1440 static inline int event2keytype(int event)
1443 case XFRM_MSG_DELSA:
1445 case XFRM_MSG_NEWSA:
1447 case XFRM_MSG_UPDSA:
1449 case XFRM_MSG_EXPIRE:
1452 pr_err("pfkey: Unknown SA event %d\n", event);
1460 static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
1462 struct sk_buff *skb;
1463 struct sadb_msg *hdr;
1465 skb = pfkey_xfrm_state2msg(x);
1468 return PTR_ERR(skb);
1470 hdr = (struct sadb_msg *) skb->data;
1471 hdr->sadb_msg_version = PF_KEY_V2;
1472 hdr->sadb_msg_type = event2keytype(c->event);
1473 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1474 hdr->sadb_msg_errno = 0;
1475 hdr->sadb_msg_reserved = 0;
1476 hdr->sadb_msg_seq = c->seq;
1477 hdr->sadb_msg_pid = c->pid;
1479 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
1484 static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1486 struct net *net = sock_net(sk);
1487 struct xfrm_state *x;
1491 x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1496 if (hdr->sadb_msg_type == SADB_ADD)
1497 err = xfrm_state_add(x);
1499 err = xfrm_state_update(x);
1501 xfrm_audit_state_add(x, err ? 0 : 1,
1502 audit_get_loginuid(current),
1503 audit_get_sessionid(current), 0);
1506 x->km.state = XFRM_STATE_DEAD;
1507 __xfrm_state_put(x);
1511 if (hdr->sadb_msg_type == SADB_ADD)
1512 c.event = XFRM_MSG_NEWSA;
1514 c.event = XFRM_MSG_UPDSA;
1515 c.seq = hdr->sadb_msg_seq;
1516 c.pid = hdr->sadb_msg_pid;
1517 km_state_notify(x, &c);
1523 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1525 struct net *net = sock_net(sk);
1526 struct xfrm_state *x;
1530 if (!ext_hdrs[SADB_EXT_SA-1] ||
1531 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1532 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1535 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1539 if ((err = security_xfrm_state_delete(x)))
1542 if (xfrm_state_kern(x)) {
1547 err = xfrm_state_delete(x);
1552 c.seq = hdr->sadb_msg_seq;
1553 c.pid = hdr->sadb_msg_pid;
1554 c.event = XFRM_MSG_DELSA;
1555 km_state_notify(x, &c);
1557 xfrm_audit_state_delete(x, err ? 0 : 1,
1558 audit_get_loginuid(current),
1559 audit_get_sessionid(current), 0);
1565 static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1567 struct net *net = sock_net(sk);
1569 struct sk_buff *out_skb;
1570 struct sadb_msg *out_hdr;
1571 struct xfrm_state *x;
1573 if (!ext_hdrs[SADB_EXT_SA-1] ||
1574 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1575 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1578 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1582 out_skb = pfkey_xfrm_state2msg(x);
1583 proto = x->id.proto;
1585 if (IS_ERR(out_skb))
1586 return PTR_ERR(out_skb);
1588 out_hdr = (struct sadb_msg *) out_skb->data;
1589 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1590 out_hdr->sadb_msg_type = SADB_GET;
1591 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1592 out_hdr->sadb_msg_errno = 0;
1593 out_hdr->sadb_msg_reserved = 0;
1594 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1595 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1596 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1601 static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
1604 struct sk_buff *skb;
1605 struct sadb_msg *hdr;
1606 int len, auth_len, enc_len, i;
1608 auth_len = xfrm_count_auth_supported();
1610 auth_len *= sizeof(struct sadb_alg);
1611 auth_len += sizeof(struct sadb_supported);
1614 enc_len = xfrm_count_enc_supported();
1616 enc_len *= sizeof(struct sadb_alg);
1617 enc_len += sizeof(struct sadb_supported);
1620 len = enc_len + auth_len + sizeof(struct sadb_msg);
1622 skb = alloc_skb(len + 16, allocation);
1626 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1627 pfkey_hdr_dup(hdr, orig);
1628 hdr->sadb_msg_errno = 0;
1629 hdr->sadb_msg_len = len / sizeof(uint64_t);
1632 struct sadb_supported *sp;
1633 struct sadb_alg *ap;
1635 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1636 ap = (struct sadb_alg *) (sp + 1);
1638 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1639 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1641 for (i = 0; ; i++) {
1642 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1645 if (aalg->available)
1651 struct sadb_supported *sp;
1652 struct sadb_alg *ap;
1654 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1655 ap = (struct sadb_alg *) (sp + 1);
1657 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1658 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1660 for (i = 0; ; i++) {
1661 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1664 if (ealg->available)
1673 static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1675 struct pfkey_sock *pfk = pfkey_sk(sk);
1676 struct sk_buff *supp_skb;
1678 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1681 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1682 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1684 pfk->registered |= (1<<hdr->sadb_msg_satype);
1689 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1691 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1692 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1697 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk,
1702 static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
1704 struct sk_buff *skb;
1705 struct sadb_msg *hdr;
1707 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1711 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1712 memcpy(hdr, ihdr, sizeof(struct sadb_msg));
1713 hdr->sadb_msg_errno = (uint8_t) 0;
1714 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1716 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk,
1720 static int key_notify_sa_flush(const struct km_event *c)
1722 struct sk_buff *skb;
1723 struct sadb_msg *hdr;
1725 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1728 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1729 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1730 hdr->sadb_msg_type = SADB_FLUSH;
1731 hdr->sadb_msg_seq = c->seq;
1732 hdr->sadb_msg_pid = c->pid;
1733 hdr->sadb_msg_version = PF_KEY_V2;
1734 hdr->sadb_msg_errno = (uint8_t) 0;
1735 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1736 hdr->sadb_msg_reserved = 0;
1738 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
1743 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1745 struct net *net = sock_net(sk);
1748 struct xfrm_audit audit_info;
1751 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1755 audit_info.loginuid = audit_get_loginuid(current);
1756 audit_info.sessionid = audit_get_sessionid(current);
1757 audit_info.secid = 0;
1758 err = xfrm_state_flush(net, proto, &audit_info);
1759 err2 = unicast_flush_resp(sk, hdr);
1761 if (err == -ESRCH) /* empty table - go quietly */
1763 return err ? err : err2;
1766 c.data.proto = proto;
1767 c.seq = hdr->sadb_msg_seq;
1768 c.pid = hdr->sadb_msg_pid;
1769 c.event = XFRM_MSG_FLUSHSA;
1771 km_state_notify(NULL, &c);
1776 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1778 struct pfkey_sock *pfk = ptr;
1779 struct sk_buff *out_skb;
1780 struct sadb_msg *out_hdr;
1782 if (!pfkey_can_dump(&pfk->sk))
1785 out_skb = pfkey_xfrm_state2msg(x);
1786 if (IS_ERR(out_skb))
1787 return PTR_ERR(out_skb);
1789 out_hdr = (struct sadb_msg *) out_skb->data;
1790 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1791 out_hdr->sadb_msg_type = SADB_DUMP;
1792 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1793 out_hdr->sadb_msg_errno = 0;
1794 out_hdr->sadb_msg_reserved = 0;
1795 out_hdr->sadb_msg_seq = count + 1;
1796 out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
1799 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
1800 &pfk->sk, sock_net(&pfk->sk));
1801 pfk->dump.skb = out_skb;
1806 static int pfkey_dump_sa(struct pfkey_sock *pfk)
1808 struct net *net = sock_net(&pfk->sk);
1809 return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1812 static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1814 xfrm_state_walk_done(&pfk->dump.u.state);
1817 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1820 struct pfkey_sock *pfk = pfkey_sk(sk);
1822 mutex_lock(&pfk->dump_lock);
1823 if (pfk->dump.dump != NULL) {
1824 mutex_unlock(&pfk->dump_lock);
1828 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1830 mutex_unlock(&pfk->dump_lock);
1834 pfk->dump.msg_version = hdr->sadb_msg_version;
1835 pfk->dump.msg_pid = hdr->sadb_msg_pid;
1836 pfk->dump.dump = pfkey_dump_sa;
1837 pfk->dump.done = pfkey_dump_sa_done;
1838 xfrm_state_walk_init(&pfk->dump.u.state, proto);
1839 mutex_unlock(&pfk->dump_lock);
1841 return pfkey_do_dump(pfk);
1844 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1846 struct pfkey_sock *pfk = pfkey_sk(sk);
1847 int satype = hdr->sadb_msg_satype;
1848 bool reset_errno = false;
1850 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1852 if (satype != 0 && satype != 1)
1854 pfk->promisc = satype;
1856 if (reset_errno && skb_cloned(skb))
1857 skb = skb_copy(skb, GFP_KERNEL);
1859 skb = skb_clone(skb, GFP_KERNEL);
1861 if (reset_errno && skb) {
1862 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1863 new_hdr->sadb_msg_errno = 0;
1866 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
1870 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1873 u32 reqid = *(u32*)ptr;
1875 for (i=0; i<xp->xfrm_nr; i++) {
1876 if (xp->xfrm_vec[i].reqid == reqid)
1882 static u32 gen_reqid(struct net *net)
1884 struct xfrm_policy_walk walk;
1887 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1893 reqid = IPSEC_MANUAL_REQID_MAX+1;
1894 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1895 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1896 xfrm_policy_walk_done(&walk);
1899 } while (reqid != start);
1904 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1906 struct net *net = xp_net(xp);
1907 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1910 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1913 if (rq->sadb_x_ipsecrequest_mode == 0)
1916 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1917 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1920 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1922 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1923 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1924 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1926 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1930 /* addresses present only in tunnel mode */
1931 if (t->mode == XFRM_MODE_TUNNEL) {
1932 u8 *sa = (u8 *) (rq + 1);
1933 int family, socklen;
1935 family = pfkey_sockaddr_extract((struct sockaddr *)sa,
1940 socklen = pfkey_sockaddr_len(family);
1941 if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen),
1942 &t->id.daddr) != family)
1944 t->encap_family = family;
1946 t->encap_family = xp->family;
1948 /* No way to set this via kame pfkey */
1955 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1958 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1959 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1961 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1962 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1964 len -= rq->sadb_x_ipsecrequest_len;
1965 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1970 static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
1972 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1975 int len = sizeof(struct sadb_x_sec_ctx);
1976 len += xfrm_ctx->ctx_len;
1977 return PFKEY_ALIGN8(len);
1982 static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
1984 const struct xfrm_tmpl *t;
1985 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1989 for (i=0; i<xp->xfrm_nr; i++) {
1990 t = xp->xfrm_vec + i;
1991 socklen += pfkey_sockaddr_len(t->encap_family);
1994 return sizeof(struct sadb_msg) +
1995 (sizeof(struct sadb_lifetime) * 3) +
1996 (sizeof(struct sadb_address) * 2) +
1997 (sockaddr_size * 2) +
1998 sizeof(struct sadb_x_policy) +
1999 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
2001 pfkey_xfrm_policy2sec_ctx_size(xp);
2004 static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
2006 struct sk_buff *skb;
2009 size = pfkey_xfrm_policy2msg_size(xp);
2011 skb = alloc_skb(size + 16, GFP_ATOMIC);
2013 return ERR_PTR(-ENOBUFS);
2018 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
2020 struct sadb_msg *hdr;
2021 struct sadb_address *addr;
2022 struct sadb_lifetime *lifetime;
2023 struct sadb_x_policy *pol;
2024 struct sadb_x_sec_ctx *sec_ctx;
2025 struct xfrm_sec_ctx *xfrm_ctx;
2028 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2029 int socklen = pfkey_sockaddr_len(xp->family);
2031 size = pfkey_xfrm_policy2msg_size(xp);
2033 /* call should fill header later */
2034 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2035 memset(hdr, 0, size); /* XXX do we need this ? */
2038 addr = (struct sadb_address*) skb_put(skb,
2039 sizeof(struct sadb_address)+sockaddr_size);
2040 addr->sadb_address_len =
2041 (sizeof(struct sadb_address)+sockaddr_size)/
2043 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2044 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2045 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2046 addr->sadb_address_reserved = 0;
2047 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2049 (struct sockaddr *) (addr + 1),
2054 addr = (struct sadb_address*) skb_put(skb,
2055 sizeof(struct sadb_address)+sockaddr_size);
2056 addr->sadb_address_len =
2057 (sizeof(struct sadb_address)+sockaddr_size)/
2059 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2060 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2061 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2062 addr->sadb_address_reserved = 0;
2064 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2065 (struct sockaddr *) (addr + 1),
2069 lifetime = (struct sadb_lifetime *) skb_put(skb,
2070 sizeof(struct sadb_lifetime));
2071 lifetime->sadb_lifetime_len =
2072 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2073 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2074 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2075 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2076 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2077 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2079 lifetime = (struct sadb_lifetime *) skb_put(skb,
2080 sizeof(struct sadb_lifetime));
2081 lifetime->sadb_lifetime_len =
2082 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2083 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2084 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2085 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2086 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2087 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2089 lifetime = (struct sadb_lifetime *) skb_put(skb,
2090 sizeof(struct sadb_lifetime));
2091 lifetime->sadb_lifetime_len =
2092 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2093 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2094 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2095 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2096 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2097 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2099 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2100 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2101 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2102 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2103 if (xp->action == XFRM_POLICY_ALLOW) {
2105 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2107 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2109 pol->sadb_x_policy_dir = dir+1;
2110 pol->sadb_x_policy_reserved = 0;
2111 pol->sadb_x_policy_id = xp->index;
2112 pol->sadb_x_policy_priority = xp->priority;
2114 for (i=0; i<xp->xfrm_nr; i++) {
2115 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
2116 struct sadb_x_ipsecrequest *rq;
2120 req_size = sizeof(struct sadb_x_ipsecrequest);
2121 if (t->mode == XFRM_MODE_TUNNEL) {
2122 socklen = pfkey_sockaddr_len(t->encap_family);
2123 req_size += socklen * 2;
2127 rq = (void*)skb_put(skb, req_size);
2128 pol->sadb_x_policy_len += req_size/8;
2129 memset(rq, 0, sizeof(*rq));
2130 rq->sadb_x_ipsecrequest_len = req_size;
2131 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2132 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2134 rq->sadb_x_ipsecrequest_mode = mode;
2135 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2137 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2139 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2140 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2142 if (t->mode == XFRM_MODE_TUNNEL) {
2143 u8 *sa = (void *)(rq + 1);
2144 pfkey_sockaddr_fill(&t->saddr, 0,
2145 (struct sockaddr *)sa,
2147 pfkey_sockaddr_fill(&t->id.daddr, 0,
2148 (struct sockaddr *) (sa + socklen),
2153 /* security context */
2154 if ((xfrm_ctx = xp->security)) {
2155 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2157 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2158 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2159 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2160 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2161 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2162 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2163 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2167 hdr->sadb_msg_len = size / sizeof(uint64_t);
2168 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2173 static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2175 struct sk_buff *out_skb;
2176 struct sadb_msg *out_hdr;
2179 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2180 if (IS_ERR(out_skb))
2181 return PTR_ERR(out_skb);
2183 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2187 out_hdr = (struct sadb_msg *) out_skb->data;
2188 out_hdr->sadb_msg_version = PF_KEY_V2;
2190 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2191 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2193 out_hdr->sadb_msg_type = event2poltype(c->event);
2194 out_hdr->sadb_msg_errno = 0;
2195 out_hdr->sadb_msg_seq = c->seq;
2196 out_hdr->sadb_msg_pid = c->pid;
2197 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
2202 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2204 struct net *net = sock_net(sk);
2206 struct sadb_lifetime *lifetime;
2207 struct sadb_address *sa;
2208 struct sadb_x_policy *pol;
2209 struct xfrm_policy *xp;
2211 struct sadb_x_sec_ctx *sec_ctx;
2213 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2214 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2215 !ext_hdrs[SADB_X_EXT_POLICY-1])
2218 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2219 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2221 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2224 xp = xfrm_policy_alloc(net, GFP_KERNEL);
2228 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2229 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2230 xp->priority = pol->sadb_x_policy_priority;
2232 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2233 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2238 xp->selector.family = xp->family;
2239 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2240 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2241 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2242 if (xp->selector.sport)
2243 xp->selector.sport_mask = htons(0xffff);
2245 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2246 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2247 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2249 /* Amusing, we set this twice. KAME apps appear to set same value
2250 * in both addresses.
2252 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2254 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2255 if (xp->selector.dport)
2256 xp->selector.dport_mask = htons(0xffff);
2258 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2259 if (sec_ctx != NULL) {
2260 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2267 err = security_xfrm_policy_alloc(&xp->security, uctx);
2274 xp->lft.soft_byte_limit = XFRM_INF;
2275 xp->lft.hard_byte_limit = XFRM_INF;
2276 xp->lft.soft_packet_limit = XFRM_INF;
2277 xp->lft.hard_packet_limit = XFRM_INF;
2278 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2279 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2280 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2281 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2282 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2284 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2285 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2286 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2287 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2288 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2291 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2292 (err = parse_ipsecrequests(xp, pol)) < 0)
2295 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2296 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2298 xfrm_audit_policy_add(xp, err ? 0 : 1,
2299 audit_get_loginuid(current),
2300 audit_get_sessionid(current), 0);
2305 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2306 c.event = XFRM_MSG_UPDPOLICY;
2308 c.event = XFRM_MSG_NEWPOLICY;
2310 c.seq = hdr->sadb_msg_seq;
2311 c.pid = hdr->sadb_msg_pid;
2313 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2319 xfrm_policy_destroy(xp);
2323 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2325 struct net *net = sock_net(sk);
2327 struct sadb_address *sa;
2328 struct sadb_x_policy *pol;
2329 struct xfrm_policy *xp;
2330 struct xfrm_selector sel;
2332 struct sadb_x_sec_ctx *sec_ctx;
2333 struct xfrm_sec_ctx *pol_ctx = NULL;
2335 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2336 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2337 !ext_hdrs[SADB_X_EXT_POLICY-1])
2340 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2341 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2344 memset(&sel, 0, sizeof(sel));
2346 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2347 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2348 sel.prefixlen_s = sa->sadb_address_prefixlen;
2349 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2350 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2352 sel.sport_mask = htons(0xffff);
2354 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2355 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2356 sel.prefixlen_d = sa->sadb_address_prefixlen;
2357 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2358 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2360 sel.dport_mask = htons(0xffff);
2362 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2363 if (sec_ctx != NULL) {
2364 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2369 err = security_xfrm_policy_alloc(&pol_ctx, uctx);
2375 xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2376 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2378 security_xfrm_policy_free(pol_ctx);
2382 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2383 audit_get_loginuid(current),
2384 audit_get_sessionid(current), 0);
2389 c.seq = hdr->sadb_msg_seq;
2390 c.pid = hdr->sadb_msg_pid;
2392 c.event = XFRM_MSG_DELPOLICY;
2393 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2400 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
2403 struct sk_buff *out_skb;
2404 struct sadb_msg *out_hdr;
2407 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2408 if (IS_ERR(out_skb)) {
2409 err = PTR_ERR(out_skb);
2412 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2416 out_hdr = (struct sadb_msg *) out_skb->data;
2417 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2418 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2419 out_hdr->sadb_msg_satype = 0;
2420 out_hdr->sadb_msg_errno = 0;
2421 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2422 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2423 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
2430 #ifdef CONFIG_NET_KEY_MIGRATE
2431 static int pfkey_sockaddr_pair_size(sa_family_t family)
2433 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2436 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2437 xfrm_address_t *saddr, xfrm_address_t *daddr,
2442 if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2445 af = pfkey_sockaddr_extract(sa, saddr);
2449 socklen = pfkey_sockaddr_len(af);
2450 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2458 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2459 struct xfrm_migrate *m)
2462 struct sadb_x_ipsecrequest *rq2;
2465 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2466 len < rq1->sadb_x_ipsecrequest_len)
2470 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2471 rq1->sadb_x_ipsecrequest_len,
2472 &m->old_saddr, &m->old_daddr,
2477 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2478 len -= rq1->sadb_x_ipsecrequest_len;
2480 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2481 len < rq2->sadb_x_ipsecrequest_len)
2485 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2486 rq2->sadb_x_ipsecrequest_len,
2487 &m->new_saddr, &m->new_daddr,
2492 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2493 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2494 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2497 m->proto = rq1->sadb_x_ipsecrequest_proto;
2498 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2501 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2503 return ((int)(rq1->sadb_x_ipsecrequest_len +
2504 rq2->sadb_x_ipsecrequest_len));
2507 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2508 const struct sadb_msg *hdr, void * const *ext_hdrs)
2510 int i, len, ret, err = -EINVAL;
2512 struct sadb_address *sa;
2513 struct sadb_x_kmaddress *kma;
2514 struct sadb_x_policy *pol;
2515 struct sadb_x_ipsecrequest *rq;
2516 struct xfrm_selector sel;
2517 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2518 struct xfrm_kmaddress k;
2520 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2521 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2522 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2527 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2528 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2530 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2536 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2537 k.reserved = kma->sadb_x_kmaddress_reserved;
2538 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2539 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2540 &k.local, &k.remote, &k.family);
2547 dir = pol->sadb_x_policy_dir - 1;
2548 memset(&sel, 0, sizeof(sel));
2550 /* set source address info of selector */
2551 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2552 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2553 sel.prefixlen_s = sa->sadb_address_prefixlen;
2554 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2555 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2557 sel.sport_mask = htons(0xffff);
2559 /* set destination address info of selector */
2560 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2561 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2562 sel.prefixlen_d = sa->sadb_address_prefixlen;
2563 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2564 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2566 sel.dport_mask = htons(0xffff);
2568 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2570 /* extract ipsecrequests */
2572 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2574 while (len > 0 && i < XFRM_MAX_DEPTH) {
2575 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2580 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2586 if (!i || len > 0) {
2591 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2598 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2599 const struct sadb_msg *hdr, void * const *ext_hdrs)
2601 return -ENOPROTOOPT;
2606 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2608 struct net *net = sock_net(sk);
2610 int err = 0, delete;
2611 struct sadb_x_policy *pol;
2612 struct xfrm_policy *xp;
2615 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2618 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2619 if (dir >= XFRM_POLICY_MAX)
2622 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2623 xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2624 dir, pol->sadb_x_policy_id, delete, &err);
2629 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2630 audit_get_loginuid(current),
2631 audit_get_sessionid(current), 0);
2635 c.seq = hdr->sadb_msg_seq;
2636 c.pid = hdr->sadb_msg_pid;
2638 c.event = XFRM_MSG_DELPOLICY;
2639 km_policy_notify(xp, dir, &c);
2641 err = key_pol_get_resp(sk, xp, hdr, dir);
2649 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2651 struct pfkey_sock *pfk = ptr;
2652 struct sk_buff *out_skb;
2653 struct sadb_msg *out_hdr;
2656 if (!pfkey_can_dump(&pfk->sk))
2659 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2660 if (IS_ERR(out_skb))
2661 return PTR_ERR(out_skb);
2663 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2667 out_hdr = (struct sadb_msg *) out_skb->data;
2668 out_hdr->sadb_msg_version = pfk->dump.msg_version;
2669 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2670 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2671 out_hdr->sadb_msg_errno = 0;
2672 out_hdr->sadb_msg_seq = count + 1;
2673 out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
2676 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
2677 &pfk->sk, sock_net(&pfk->sk));
2678 pfk->dump.skb = out_skb;
2683 static int pfkey_dump_sp(struct pfkey_sock *pfk)
2685 struct net *net = sock_net(&pfk->sk);
2686 return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2689 static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2691 xfrm_policy_walk_done(&pfk->dump.u.policy);
2694 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2696 struct pfkey_sock *pfk = pfkey_sk(sk);
2698 mutex_lock(&pfk->dump_lock);
2699 if (pfk->dump.dump != NULL) {
2700 mutex_unlock(&pfk->dump_lock);
2704 pfk->dump.msg_version = hdr->sadb_msg_version;
2705 pfk->dump.msg_pid = hdr->sadb_msg_pid;
2706 pfk->dump.dump = pfkey_dump_sp;
2707 pfk->dump.done = pfkey_dump_sp_done;
2708 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2709 mutex_unlock(&pfk->dump_lock);
2711 return pfkey_do_dump(pfk);
2714 static int key_notify_policy_flush(const struct km_event *c)
2716 struct sk_buff *skb_out;
2717 struct sadb_msg *hdr;
2719 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2722 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2723 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2724 hdr->sadb_msg_seq = c->seq;
2725 hdr->sadb_msg_pid = c->pid;
2726 hdr->sadb_msg_version = PF_KEY_V2;
2727 hdr->sadb_msg_errno = (uint8_t) 0;
2728 hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2729 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2730 hdr->sadb_msg_reserved = 0;
2731 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
2736 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2738 struct net *net = sock_net(sk);
2740 struct xfrm_audit audit_info;
2743 audit_info.loginuid = audit_get_loginuid(current);
2744 audit_info.sessionid = audit_get_sessionid(current);
2745 audit_info.secid = 0;
2746 err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info);
2747 err2 = unicast_flush_resp(sk, hdr);
2749 if (err == -ESRCH) /* empty table - old silent behavior */
2754 c.data.type = XFRM_POLICY_TYPE_MAIN;
2755 c.event = XFRM_MSG_FLUSHPOLICY;
2756 c.pid = hdr->sadb_msg_pid;
2757 c.seq = hdr->sadb_msg_seq;
2759 km_policy_notify(NULL, 0, &c);
2764 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2765 const struct sadb_msg *hdr, void * const *ext_hdrs);
2766 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2767 [SADB_RESERVED] = pfkey_reserved,
2768 [SADB_GETSPI] = pfkey_getspi,
2769 [SADB_UPDATE] = pfkey_add,
2770 [SADB_ADD] = pfkey_add,
2771 [SADB_DELETE] = pfkey_delete,
2772 [SADB_GET] = pfkey_get,
2773 [SADB_ACQUIRE] = pfkey_acquire,
2774 [SADB_REGISTER] = pfkey_register,
2775 [SADB_EXPIRE] = NULL,
2776 [SADB_FLUSH] = pfkey_flush,
2777 [SADB_DUMP] = pfkey_dump,
2778 [SADB_X_PROMISC] = pfkey_promisc,
2779 [SADB_X_PCHANGE] = NULL,
2780 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2781 [SADB_X_SPDADD] = pfkey_spdadd,
2782 [SADB_X_SPDDELETE] = pfkey_spddelete,
2783 [SADB_X_SPDGET] = pfkey_spdget,
2784 [SADB_X_SPDACQUIRE] = NULL,
2785 [SADB_X_SPDDUMP] = pfkey_spddump,
2786 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2787 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2788 [SADB_X_SPDDELETE2] = pfkey_spdget,
2789 [SADB_X_MIGRATE] = pfkey_migrate,
2792 static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
2794 void *ext_hdrs[SADB_EXT_MAX];
2797 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2798 BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
2800 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2801 err = parse_exthdrs(skb, hdr, ext_hdrs);
2804 if (pfkey_funcs[hdr->sadb_msg_type])
2805 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2810 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2812 struct sadb_msg *hdr = NULL;
2814 if (skb->len < sizeof(*hdr)) {
2817 hdr = (struct sadb_msg *) skb->data;
2818 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2819 hdr->sadb_msg_reserved != 0 ||
2820 (hdr->sadb_msg_type <= SADB_RESERVED ||
2821 hdr->sadb_msg_type > SADB_MAX)) {
2824 } else if (hdr->sadb_msg_len != (skb->len /
2825 sizeof(uint64_t)) ||
2826 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2827 sizeof(uint64_t))) {
2837 static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2838 const struct xfrm_algo_desc *d)
2840 unsigned int id = d->desc.sadb_alg_id;
2842 if (id >= sizeof(t->aalgos) * 8)
2845 return (t->aalgos >> id) & 1;
2848 static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2849 const struct xfrm_algo_desc *d)
2851 unsigned int id = d->desc.sadb_alg_id;
2853 if (id >= sizeof(t->ealgos) * 8)
2856 return (t->ealgos >> id) & 1;
2859 static int count_ah_combs(const struct xfrm_tmpl *t)
2863 for (i = 0; ; i++) {
2864 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2867 if (aalg_tmpl_set(t, aalg) && aalg->available)
2868 sz += sizeof(struct sadb_comb);
2870 return sz + sizeof(struct sadb_prop);
2873 static int count_esp_combs(const struct xfrm_tmpl *t)
2877 for (i = 0; ; i++) {
2878 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2882 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2885 for (k = 1; ; k++) {
2886 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2890 if (aalg_tmpl_set(t, aalg) && aalg->available)
2891 sz += sizeof(struct sadb_comb);
2894 return sz + sizeof(struct sadb_prop);
2897 static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2899 struct sadb_prop *p;
2902 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2903 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2904 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2905 p->sadb_prop_replay = 32;
2906 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2908 for (i = 0; ; i++) {
2909 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2913 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2914 struct sadb_comb *c;
2915 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2916 memset(c, 0, sizeof(*c));
2917 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2918 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2919 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2920 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2921 c->sadb_comb_hard_addtime = 24*60*60;
2922 c->sadb_comb_soft_addtime = 20*60*60;
2923 c->sadb_comb_hard_usetime = 8*60*60;
2924 c->sadb_comb_soft_usetime = 7*60*60;
2929 static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2931 struct sadb_prop *p;
2934 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2935 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2936 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2937 p->sadb_prop_replay = 32;
2938 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2941 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2945 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2948 for (k = 1; ; k++) {
2949 struct sadb_comb *c;
2950 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2953 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2955 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2956 memset(c, 0, sizeof(*c));
2957 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2958 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2959 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2960 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2961 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2962 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2963 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2964 c->sadb_comb_hard_addtime = 24*60*60;
2965 c->sadb_comb_soft_addtime = 20*60*60;
2966 c->sadb_comb_hard_usetime = 8*60*60;
2967 c->sadb_comb_soft_usetime = 7*60*60;
2972 static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
2977 static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
2979 struct sk_buff *out_skb;
2980 struct sadb_msg *out_hdr;
2984 hard = c->data.hard;
2990 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
2991 if (IS_ERR(out_skb))
2992 return PTR_ERR(out_skb);
2994 out_hdr = (struct sadb_msg *) out_skb->data;
2995 out_hdr->sadb_msg_version = PF_KEY_V2;
2996 out_hdr->sadb_msg_type = SADB_EXPIRE;
2997 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2998 out_hdr->sadb_msg_errno = 0;
2999 out_hdr->sadb_msg_reserved = 0;
3000 out_hdr->sadb_msg_seq = 0;
3001 out_hdr->sadb_msg_pid = 0;
3003 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3008 static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
3010 struct net *net = x ? xs_net(x) : c->net;
3011 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3013 if (atomic_read(&net_pfkey->socks_nr) == 0)
3017 case XFRM_MSG_EXPIRE:
3018 return key_notify_sa_expire(x, c);
3019 case XFRM_MSG_DELSA:
3020 case XFRM_MSG_NEWSA:
3021 case XFRM_MSG_UPDSA:
3022 return key_notify_sa(x, c);
3023 case XFRM_MSG_FLUSHSA:
3024 return key_notify_sa_flush(c);
3025 case XFRM_MSG_NEWAE: /* not yet supported */
3028 pr_err("pfkey: Unknown SA event %d\n", c->event);
3035 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3037 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3041 case XFRM_MSG_POLEXPIRE:
3042 return key_notify_policy_expire(xp, c);
3043 case XFRM_MSG_DELPOLICY:
3044 case XFRM_MSG_NEWPOLICY:
3045 case XFRM_MSG_UPDPOLICY:
3046 return key_notify_policy(xp, dir, c);
3047 case XFRM_MSG_FLUSHPOLICY:
3048 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3050 return key_notify_policy_flush(c);
3052 pr_err("pfkey: Unknown policy event %d\n", c->event);
3059 static u32 get_acqseq(void)
3062 static atomic_t acqseq;
3065 res = atomic_inc_return(&acqseq);
3070 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
3072 struct sk_buff *skb;
3073 struct sadb_msg *hdr;
3074 struct sadb_address *addr;
3075 struct sadb_x_policy *pol;
3078 struct sadb_x_sec_ctx *sec_ctx;
3079 struct xfrm_sec_ctx *xfrm_ctx;
3082 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3086 size = sizeof(struct sadb_msg) +
3087 (sizeof(struct sadb_address) * 2) +
3088 (sockaddr_size * 2) +
3089 sizeof(struct sadb_x_policy);
3091 if (x->id.proto == IPPROTO_AH)
3092 size += count_ah_combs(t);
3093 else if (x->id.proto == IPPROTO_ESP)
3094 size += count_esp_combs(t);
3096 if ((xfrm_ctx = x->security)) {
3097 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3098 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3101 skb = alloc_skb(size + 16, GFP_ATOMIC);
3105 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3106 hdr->sadb_msg_version = PF_KEY_V2;
3107 hdr->sadb_msg_type = SADB_ACQUIRE;
3108 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3109 hdr->sadb_msg_len = size / sizeof(uint64_t);
3110 hdr->sadb_msg_errno = 0;
3111 hdr->sadb_msg_reserved = 0;
3112 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3113 hdr->sadb_msg_pid = 0;
3116 addr = (struct sadb_address*) skb_put(skb,
3117 sizeof(struct sadb_address)+sockaddr_size);
3118 addr->sadb_address_len =
3119 (sizeof(struct sadb_address)+sockaddr_size)/
3121 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3122 addr->sadb_address_proto = 0;
3123 addr->sadb_address_reserved = 0;
3124 addr->sadb_address_prefixlen =
3125 pfkey_sockaddr_fill(&x->props.saddr, 0,
3126 (struct sockaddr *) (addr + 1),
3128 if (!addr->sadb_address_prefixlen)
3132 addr = (struct sadb_address*) skb_put(skb,
3133 sizeof(struct sadb_address)+sockaddr_size);
3134 addr->sadb_address_len =
3135 (sizeof(struct sadb_address)+sockaddr_size)/
3137 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3138 addr->sadb_address_proto = 0;
3139 addr->sadb_address_reserved = 0;
3140 addr->sadb_address_prefixlen =
3141 pfkey_sockaddr_fill(&x->id.daddr, 0,
3142 (struct sockaddr *) (addr + 1),
3144 if (!addr->sadb_address_prefixlen)
3147 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3148 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3149 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3150 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3151 pol->sadb_x_policy_dir = dir+1;
3152 pol->sadb_x_policy_reserved = 0;
3153 pol->sadb_x_policy_id = xp->index;
3154 pol->sadb_x_policy_priority = xp->priority;
3156 /* Set sadb_comb's. */
3157 if (x->id.proto == IPPROTO_AH)
3158 dump_ah_combs(skb, t);
3159 else if (x->id.proto == IPPROTO_ESP)
3160 dump_esp_combs(skb, t);
3162 /* security context */
3164 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3165 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3166 sec_ctx->sadb_x_sec_len =
3167 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3168 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3169 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3170 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3171 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3172 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3176 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3180 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3181 u8 *data, int len, int *dir)
3183 struct net *net = sock_net(sk);
3184 struct xfrm_policy *xp;
3185 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3186 struct sadb_x_sec_ctx *sec_ctx;
3188 switch (sk->sk_family) {
3190 if (opt != IP_IPSEC_POLICY) {
3195 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3197 if (opt != IPV6_IPSEC_POLICY) {
3210 if (len < sizeof(struct sadb_x_policy) ||
3211 pol->sadb_x_policy_len*8 > len ||
3212 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3213 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3216 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3222 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3223 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3225 xp->lft.soft_byte_limit = XFRM_INF;
3226 xp->lft.hard_byte_limit = XFRM_INF;
3227 xp->lft.soft_packet_limit = XFRM_INF;
3228 xp->lft.hard_packet_limit = XFRM_INF;
3229 xp->family = sk->sk_family;
3232 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3233 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3236 /* security context too */
3237 if (len >= (pol->sadb_x_policy_len*8 +
3238 sizeof(struct sadb_x_sec_ctx))) {
3239 char *p = (char *)pol;
3240 struct xfrm_user_sec_ctx *uctx;
3242 p += pol->sadb_x_policy_len*8;
3243 sec_ctx = (struct sadb_x_sec_ctx *)p;
3244 if (len < pol->sadb_x_policy_len*8 +
3245 sec_ctx->sadb_x_sec_len*8) {
3249 if ((*dir = verify_sec_ctx_len(p)))
3251 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3252 *dir = security_xfrm_policy_alloc(&xp->security, uctx);
3259 *dir = pol->sadb_x_policy_dir-1;
3264 xfrm_policy_destroy(xp);
3268 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3270 struct sk_buff *skb;
3271 struct sadb_msg *hdr;
3273 struct sadb_address *addr;
3274 struct sadb_x_nat_t_port *n_port;
3277 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3278 struct xfrm_encap_tmpl *natt = NULL;
3280 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3292 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3294 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3295 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3298 size = sizeof(struct sadb_msg) +
3299 sizeof(struct sadb_sa) +
3300 (sizeof(struct sadb_address) * 2) +
3301 (sockaddr_size * 2) +
3302 (sizeof(struct sadb_x_nat_t_port) * 2);
3304 skb = alloc_skb(size + 16, GFP_ATOMIC);
3308 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3309 hdr->sadb_msg_version = PF_KEY_V2;
3310 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3311 hdr->sadb_msg_satype = satype;
3312 hdr->sadb_msg_len = size / sizeof(uint64_t);
3313 hdr->sadb_msg_errno = 0;
3314 hdr->sadb_msg_reserved = 0;
3315 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3316 hdr->sadb_msg_pid = 0;
3319 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3320 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3321 sa->sadb_sa_exttype = SADB_EXT_SA;
3322 sa->sadb_sa_spi = x->id.spi;
3323 sa->sadb_sa_replay = 0;
3324 sa->sadb_sa_state = 0;
3325 sa->sadb_sa_auth = 0;
3326 sa->sadb_sa_encrypt = 0;
3327 sa->sadb_sa_flags = 0;
3329 /* ADDRESS_SRC (old addr) */
3330 addr = (struct sadb_address*)
3331 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3332 addr->sadb_address_len =
3333 (sizeof(struct sadb_address)+sockaddr_size)/
3335 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3336 addr->sadb_address_proto = 0;
3337 addr->sadb_address_reserved = 0;
3338 addr->sadb_address_prefixlen =
3339 pfkey_sockaddr_fill(&x->props.saddr, 0,
3340 (struct sockaddr *) (addr + 1),
3342 if (!addr->sadb_address_prefixlen)
3345 /* NAT_T_SPORT (old port) */
3346 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3347 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3348 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3349 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3350 n_port->sadb_x_nat_t_port_reserved = 0;
3352 /* ADDRESS_DST (new addr) */
3353 addr = (struct sadb_address*)
3354 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3355 addr->sadb_address_len =
3356 (sizeof(struct sadb_address)+sockaddr_size)/
3358 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3359 addr->sadb_address_proto = 0;
3360 addr->sadb_address_reserved = 0;
3361 addr->sadb_address_prefixlen =
3362 pfkey_sockaddr_fill(ipaddr, 0,
3363 (struct sockaddr *) (addr + 1),
3365 if (!addr->sadb_address_prefixlen)
3368 /* NAT_T_DPORT (new port) */
3369 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3370 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3371 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3372 n_port->sadb_x_nat_t_port_port = sport;
3373 n_port->sadb_x_nat_t_port_reserved = 0;
3375 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3379 #ifdef CONFIG_NET_KEY_MIGRATE
3380 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3381 const struct xfrm_selector *sel)
3383 struct sadb_address *addr;
3384 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3385 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3386 addr->sadb_address_exttype = type;
3387 addr->sadb_address_proto = sel->proto;
3388 addr->sadb_address_reserved = 0;
3391 case SADB_EXT_ADDRESS_SRC:
3392 addr->sadb_address_prefixlen = sel->prefixlen_s;
3393 pfkey_sockaddr_fill(&sel->saddr, 0,
3394 (struct sockaddr *)(addr + 1),
3397 case SADB_EXT_ADDRESS_DST:
3398 addr->sadb_address_prefixlen = sel->prefixlen_d;
3399 pfkey_sockaddr_fill(&sel->daddr, 0,
3400 (struct sockaddr *)(addr + 1),
3411 static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
3413 struct sadb_x_kmaddress *kma;
3415 int family = k->family;
3416 int socklen = pfkey_sockaddr_len(family);
3419 size_req = (sizeof(struct sadb_x_kmaddress) +
3420 pfkey_sockaddr_pair_size(family));
3422 kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req);
3423 memset(kma, 0, size_req);
3424 kma->sadb_x_kmaddress_len = size_req / 8;
3425 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3426 kma->sadb_x_kmaddress_reserved = k->reserved;
3428 sa = (u8 *)(kma + 1);
3429 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3430 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3436 static int set_ipsecrequest(struct sk_buff *skb,
3437 uint8_t proto, uint8_t mode, int level,
3438 uint32_t reqid, uint8_t family,
3439 const xfrm_address_t *src, const xfrm_address_t *dst)
3441 struct sadb_x_ipsecrequest *rq;
3443 int socklen = pfkey_sockaddr_len(family);
3446 size_req = sizeof(struct sadb_x_ipsecrequest) +
3447 pfkey_sockaddr_pair_size(family);
3449 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3450 memset(rq, 0, size_req);
3451 rq->sadb_x_ipsecrequest_len = size_req;
3452 rq->sadb_x_ipsecrequest_proto = proto;
3453 rq->sadb_x_ipsecrequest_mode = mode;
3454 rq->sadb_x_ipsecrequest_level = level;
3455 rq->sadb_x_ipsecrequest_reqid = reqid;
3457 sa = (u8 *) (rq + 1);
3458 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3459 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3466 #ifdef CONFIG_NET_KEY_MIGRATE
3467 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3468 const struct xfrm_migrate *m, int num_bundles,
3469 const struct xfrm_kmaddress *k)
3475 struct sk_buff *skb;
3476 struct sadb_msg *hdr;
3477 struct sadb_x_policy *pol;
3478 const struct xfrm_migrate *mp;
3480 if (type != XFRM_POLICY_TYPE_MAIN)
3483 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3487 /* addresses for KM */
3488 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3489 pfkey_sockaddr_pair_size(k->family));
3493 sasize_sel = pfkey_sockaddr_size(sel->family);
3496 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3499 size_pol += sizeof(struct sadb_x_policy);
3502 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3503 /* old locator pair */
3504 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3505 pfkey_sockaddr_pair_size(mp->old_family);
3506 /* new locator pair */
3507 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3508 pfkey_sockaddr_pair_size(mp->new_family);
3511 size += sizeof(struct sadb_msg) + size_pol;
3514 skb = alloc_skb(size, GFP_ATOMIC);
3518 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3519 hdr->sadb_msg_version = PF_KEY_V2;
3520 hdr->sadb_msg_type = SADB_X_MIGRATE;
3521 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3522 hdr->sadb_msg_len = size / 8;
3523 hdr->sadb_msg_errno = 0;
3524 hdr->sadb_msg_reserved = 0;
3525 hdr->sadb_msg_seq = 0;
3526 hdr->sadb_msg_pid = 0;
3528 /* Addresses to be used by KM for negotiation, if ext is available */
3529 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3533 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3536 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3538 /* policy information */
3539 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3540 pol->sadb_x_policy_len = size_pol / 8;
3541 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3542 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3543 pol->sadb_x_policy_dir = dir + 1;
3544 pol->sadb_x_policy_reserved = 0;
3545 pol->sadb_x_policy_id = 0;
3546 pol->sadb_x_policy_priority = 0;
3548 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3549 /* old ipsecrequest */
3550 int mode = pfkey_mode_from_xfrm(mp->mode);
3553 if (set_ipsecrequest(skb, mp->proto, mode,
3554 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3555 mp->reqid, mp->old_family,
3556 &mp->old_saddr, &mp->old_daddr) < 0)
3559 /* new ipsecrequest */
3560 if (set_ipsecrequest(skb, mp->proto, mode,
3561 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3562 mp->reqid, mp->new_family,
3563 &mp->new_saddr, &mp->new_daddr) < 0)
3567 /* broadcast migrate message to sockets */
3568 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
3577 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3578 const struct xfrm_migrate *m, int num_bundles,
3579 const struct xfrm_kmaddress *k)
3581 return -ENOPROTOOPT;
3585 static int pfkey_sendmsg(struct kiocb *kiocb,
3586 struct socket *sock, struct msghdr *msg, size_t len)
3588 struct sock *sk = sock->sk;
3589 struct sk_buff *skb = NULL;
3590 struct sadb_msg *hdr = NULL;
3594 if (msg->msg_flags & MSG_OOB)
3598 if ((unsigned)len > sk->sk_sndbuf - 32)
3602 skb = alloc_skb(len, GFP_KERNEL);
3607 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3610 hdr = pfkey_get_base_msg(skb, &err);
3614 mutex_lock(&xfrm_cfg_mutex);
3615 err = pfkey_process(sk, skb, hdr);
3616 mutex_unlock(&xfrm_cfg_mutex);
3619 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3626 static int pfkey_recvmsg(struct kiocb *kiocb,
3627 struct socket *sock, struct msghdr *msg, size_t len,
3630 struct sock *sk = sock->sk;
3631 struct pfkey_sock *pfk = pfkey_sk(sk);
3632 struct sk_buff *skb;
3636 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3639 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3645 msg->msg_flags |= MSG_TRUNC;
3649 skb_reset_transport_header(skb);
3650 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3654 sock_recv_ts_and_drops(msg, sk, skb);
3656 err = (flags & MSG_TRUNC) ? skb->len : copied;
3658 if (pfk->dump.dump != NULL &&
3659 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3663 skb_free_datagram(sk, skb);
3668 static const struct proto_ops pfkey_ops = {
3670 .owner = THIS_MODULE,
3671 /* Operations that make no sense on pfkey sockets. */
3672 .bind = sock_no_bind,
3673 .connect = sock_no_connect,
3674 .socketpair = sock_no_socketpair,
3675 .accept = sock_no_accept,
3676 .getname = sock_no_getname,
3677 .ioctl = sock_no_ioctl,
3678 .listen = sock_no_listen,
3679 .shutdown = sock_no_shutdown,
3680 .setsockopt = sock_no_setsockopt,
3681 .getsockopt = sock_no_getsockopt,
3682 .mmap = sock_no_mmap,
3683 .sendpage = sock_no_sendpage,
3685 /* Now the operations that really occur. */
3686 .release = pfkey_release,
3687 .poll = datagram_poll,
3688 .sendmsg = pfkey_sendmsg,
3689 .recvmsg = pfkey_recvmsg,
3692 static const struct net_proto_family pfkey_family_ops = {
3694 .create = pfkey_create,
3695 .owner = THIS_MODULE,
3698 #ifdef CONFIG_PROC_FS
3699 static int pfkey_seq_show(struct seq_file *f, void *v)
3701 struct sock *s = sk_entry(v);
3703 if (v == SEQ_START_TOKEN)
3704 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3706 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
3708 atomic_read(&s->sk_refcnt),
3709 sk_rmem_alloc_get(s),
3710 sk_wmem_alloc_get(s),
3717 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3720 struct net *net = seq_file_net(f);
3721 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3724 return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
3727 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3729 struct net *net = seq_file_net(f);
3730 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3732 return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
3735 static void pfkey_seq_stop(struct seq_file *f, void *v)
3741 static const struct seq_operations pfkey_seq_ops = {
3742 .start = pfkey_seq_start,
3743 .next = pfkey_seq_next,
3744 .stop = pfkey_seq_stop,
3745 .show = pfkey_seq_show,
3748 static int pfkey_seq_open(struct inode *inode, struct file *file)
3750 return seq_open_net(inode, file, &pfkey_seq_ops,
3751 sizeof(struct seq_net_private));
3754 static const struct file_operations pfkey_proc_ops = {
3755 .open = pfkey_seq_open,
3757 .llseek = seq_lseek,
3758 .release = seq_release_net,
3761 static int __net_init pfkey_init_proc(struct net *net)
3763 struct proc_dir_entry *e;
3765 e = proc_net_fops_create(net, "pfkey", 0, &pfkey_proc_ops);
3772 static void __net_exit pfkey_exit_proc(struct net *net)
3774 proc_net_remove(net, "pfkey");
3777 static inline int pfkey_init_proc(struct net *net)
3782 static inline void pfkey_exit_proc(struct net *net)
3787 static struct xfrm_mgr pfkeyv2_mgr =
3790 .notify = pfkey_send_notify,
3791 .acquire = pfkey_send_acquire,
3792 .compile_policy = pfkey_compile_policy,
3793 .new_mapping = pfkey_send_new_mapping,
3794 .notify_policy = pfkey_send_policy_notify,
3795 .migrate = pfkey_send_migrate,
3798 static int __net_init pfkey_net_init(struct net *net)
3800 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3803 INIT_HLIST_HEAD(&net_pfkey->table);
3804 atomic_set(&net_pfkey->socks_nr, 0);
3806 rv = pfkey_init_proc(net);
3811 static void __net_exit pfkey_net_exit(struct net *net)
3813 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3815 pfkey_exit_proc(net);
3816 BUG_ON(!hlist_empty(&net_pfkey->table));
3819 static struct pernet_operations pfkey_net_ops = {
3820 .init = pfkey_net_init,
3821 .exit = pfkey_net_exit,
3822 .id = &pfkey_net_id,
3823 .size = sizeof(struct netns_pfkey),
3826 static void __exit ipsec_pfkey_exit(void)
3828 xfrm_unregister_km(&pfkeyv2_mgr);
3829 sock_unregister(PF_KEY);
3830 unregister_pernet_subsys(&pfkey_net_ops);
3831 proto_unregister(&key_proto);
3834 static int __init ipsec_pfkey_init(void)
3836 int err = proto_register(&key_proto, 0);
3841 err = register_pernet_subsys(&pfkey_net_ops);
3843 goto out_unregister_key_proto;
3844 err = sock_register(&pfkey_family_ops);
3846 goto out_unregister_pernet;
3847 err = xfrm_register_km(&pfkeyv2_mgr);
3849 goto out_sock_unregister;
3853 out_sock_unregister:
3854 sock_unregister(PF_KEY);
3855 out_unregister_pernet:
3856 unregister_pernet_subsys(&pfkey_net_ops);
3857 out_unregister_key_proto:
3858 proto_unregister(&key_proto);
3862 module_init(ipsec_pfkey_init);
3863 module_exit(ipsec_pfkey_exit);
3864 MODULE_LICENSE("GPL");
3865 MODULE_ALIAS_NETPROTO(PF_KEY);