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>
33 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
34 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
37 /* List of all pfkey sockets. */
38 static HLIST_HEAD(pfkey_table);
39 static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
40 static DEFINE_RWLOCK(pfkey_table_lock);
41 static atomic_t pfkey_table_users = ATOMIC_INIT(0);
43 static atomic_t pfkey_socks_nr = ATOMIC_INIT(0);
46 /* struct sock must be the first member of struct pfkey_sock */
52 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
54 return (struct pfkey_sock *)sk;
57 static void pfkey_sock_destruct(struct sock *sk)
59 skb_queue_purge(&sk->sk_receive_queue);
61 if (!sock_flag(sk, SOCK_DEAD)) {
62 printk("Attempt to release alive pfkey socket: %p\n", sk);
66 BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
67 BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
69 atomic_dec(&pfkey_socks_nr);
72 static void pfkey_table_grab(void)
74 write_lock_bh(&pfkey_table_lock);
76 if (atomic_read(&pfkey_table_users)) {
77 DECLARE_WAITQUEUE(wait, current);
79 add_wait_queue_exclusive(&pfkey_table_wait, &wait);
81 set_current_state(TASK_UNINTERRUPTIBLE);
82 if (atomic_read(&pfkey_table_users) == 0)
84 write_unlock_bh(&pfkey_table_lock);
86 write_lock_bh(&pfkey_table_lock);
89 __set_current_state(TASK_RUNNING);
90 remove_wait_queue(&pfkey_table_wait, &wait);
94 static __inline__ void pfkey_table_ungrab(void)
96 write_unlock_bh(&pfkey_table_lock);
97 wake_up(&pfkey_table_wait);
100 static __inline__ void pfkey_lock_table(void)
102 /* read_lock() synchronizes us to pfkey_table_grab */
104 read_lock(&pfkey_table_lock);
105 atomic_inc(&pfkey_table_users);
106 read_unlock(&pfkey_table_lock);
109 static __inline__ void pfkey_unlock_table(void)
111 if (atomic_dec_and_test(&pfkey_table_users))
112 wake_up(&pfkey_table_wait);
116 static const struct proto_ops pfkey_ops;
118 static void pfkey_insert(struct sock *sk)
121 sk_add_node(sk, &pfkey_table);
122 pfkey_table_ungrab();
125 static void pfkey_remove(struct sock *sk)
128 sk_del_node_init(sk);
129 pfkey_table_ungrab();
132 static struct proto key_proto = {
134 .owner = THIS_MODULE,
135 .obj_size = sizeof(struct pfkey_sock),
138 static int pfkey_create(struct socket *sock, int protocol)
143 if (!capable(CAP_NET_ADMIN))
145 if (sock->type != SOCK_RAW)
146 return -ESOCKTNOSUPPORT;
147 if (protocol != PF_KEY_V2)
148 return -EPROTONOSUPPORT;
151 sk = sk_alloc(PF_KEY, GFP_KERNEL, &key_proto, 1);
155 sock->ops = &pfkey_ops;
156 sock_init_data(sock, sk);
158 sk->sk_family = PF_KEY;
159 sk->sk_destruct = pfkey_sock_destruct;
161 atomic_inc(&pfkey_socks_nr);
170 static int pfkey_release(struct socket *sock)
172 struct sock *sk = sock->sk;
181 skb_queue_purge(&sk->sk_write_queue);
187 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
188 gfp_t allocation, struct sock *sk)
194 if (atomic_read(&skb->users) != 1) {
195 *skb2 = skb_clone(skb, allocation);
198 atomic_inc(&skb->users);
202 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
204 skb_set_owner_r(*skb2, sk);
205 skb_queue_tail(&sk->sk_receive_queue, *skb2);
206 sk->sk_data_ready(sk, (*skb2)->len);
215 /* Send SKB to all pfkey sockets matching selected criteria. */
216 #define BROADCAST_ALL 0
217 #define BROADCAST_ONE 1
218 #define BROADCAST_REGISTERED 2
219 #define BROADCAST_PROMISC_ONLY 4
220 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
221 int broadcast_flags, struct sock *one_sk)
224 struct hlist_node *node;
225 struct sk_buff *skb2 = NULL;
228 /* XXX Do we need something like netlink_overrun? I think
229 * XXX PF_KEY socket apps will not mind current behavior.
235 sk_for_each(sk, node, &pfkey_table) {
236 struct pfkey_sock *pfk = pfkey_sk(sk);
239 /* Yes, it means that if you are meant to receive this
240 * pfkey message you receive it twice as promiscuous
244 pfkey_broadcast_one(skb, &skb2, allocation, sk);
246 /* the exact target will be processed later */
249 if (broadcast_flags != BROADCAST_ALL) {
250 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
252 if ((broadcast_flags & BROADCAST_REGISTERED) &&
255 if (broadcast_flags & BROADCAST_ONE)
259 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
261 /* Error is cleare after succecful sending to at least one
263 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
266 pfkey_unlock_table();
269 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
277 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
282 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
284 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
285 struct sadb_msg *hdr;
290 /* Woe be to the platform trying to support PFKEY yet
291 * having normal errnos outside the 1-255 range, inclusive.
294 if (err == ERESTARTSYS ||
295 err == ERESTARTNOHAND ||
296 err == ERESTARTNOINTR)
300 BUG_ON(err <= 0 || err >= 256);
302 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
303 pfkey_hdr_dup(hdr, orig);
304 hdr->sadb_msg_errno = (uint8_t) err;
305 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
308 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
313 static u8 sadb_ext_min_len[] = {
314 [SADB_EXT_RESERVED] = (u8) 0,
315 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
316 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
317 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
318 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
319 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
320 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
321 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
322 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
323 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
324 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
325 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
326 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
327 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
328 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
329 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
330 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
331 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
332 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
333 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
334 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
335 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
336 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
337 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
338 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
341 /* Verify sadb_address_{len,prefixlen} against sa_family. */
342 static int verify_address_len(void *p)
344 struct sadb_address *sp = p;
345 struct sockaddr *addr = (struct sockaddr *)(sp + 1);
346 struct sockaddr_in *sin;
347 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
348 struct sockaddr_in6 *sin6;
352 switch (addr->sa_family) {
354 len = sizeof(*sp) + sizeof(*sin) + (sizeof(uint64_t) - 1);
355 len /= sizeof(uint64_t);
356 if (sp->sadb_address_len != len ||
357 sp->sadb_address_prefixlen > 32)
360 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
362 len = sizeof(*sp) + sizeof(*sin6) + (sizeof(uint64_t) - 1);
363 len /= sizeof(uint64_t);
364 if (sp->sadb_address_len != len ||
365 sp->sadb_address_prefixlen > 128)
370 /* It is user using kernel to keep track of security
371 * associations for another protocol, such as
372 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
375 * XXX Actually, association/policy database is not yet
376 * XXX able to cope with arbitrary sockaddr families.
377 * XXX When it can, remove this -EINVAL. -DaveM
386 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
390 len += sizeof(struct sadb_x_sec_ctx);
391 len += sec_ctx->sadb_x_ctx_len;
392 len += sizeof(uint64_t) - 1;
393 len /= sizeof(uint64_t);
398 static inline int verify_sec_ctx_len(void *p)
400 struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
403 if (sec_ctx->sadb_x_ctx_len > PAGE_SIZE)
406 len = pfkey_sec_ctx_len(sec_ctx);
408 if (sec_ctx->sadb_x_sec_len != len)
414 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
416 struct xfrm_user_sec_ctx *uctx = NULL;
417 int ctx_size = sec_ctx->sadb_x_ctx_len;
419 uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
424 uctx->len = pfkey_sec_ctx_len(sec_ctx);
425 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
426 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
427 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
428 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
429 memcpy(uctx + 1, sec_ctx + 1,
435 static int present_and_same_family(struct sadb_address *src,
436 struct sadb_address *dst)
438 struct sockaddr *s_addr, *d_addr;
443 s_addr = (struct sockaddr *)(src + 1);
444 d_addr = (struct sockaddr *)(dst + 1);
445 if (s_addr->sa_family != d_addr->sa_family)
447 if (s_addr->sa_family != AF_INET
448 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
449 && s_addr->sa_family != AF_INET6
457 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
459 char *p = (char *) hdr;
465 struct sadb_ext *ehdr = (struct sadb_ext *) p;
469 ext_len = ehdr->sadb_ext_len;
470 ext_len *= sizeof(uint64_t);
471 ext_type = ehdr->sadb_ext_type;
472 if (ext_len < sizeof(uint64_t) ||
474 ext_type == SADB_EXT_RESERVED)
477 if (ext_type <= SADB_EXT_MAX) {
478 int min = (int) sadb_ext_min_len[ext_type];
481 if (ext_hdrs[ext_type-1] != NULL)
483 if (ext_type == SADB_EXT_ADDRESS_SRC ||
484 ext_type == SADB_EXT_ADDRESS_DST ||
485 ext_type == SADB_EXT_ADDRESS_PROXY ||
486 ext_type == SADB_X_EXT_NAT_T_OA) {
487 if (verify_address_len(p))
490 if (ext_type == SADB_X_EXT_SEC_CTX) {
491 if (verify_sec_ctx_len(p))
494 ext_hdrs[ext_type-1] = p;
504 pfkey_satype2proto(uint8_t satype)
507 case SADB_SATYPE_UNSPEC:
508 return IPSEC_PROTO_ANY;
511 case SADB_SATYPE_ESP:
513 case SADB_X_SATYPE_IPCOMP:
523 pfkey_proto2satype(uint16_t proto)
527 return SADB_SATYPE_AH;
529 return SADB_SATYPE_ESP;
531 return SADB_X_SATYPE_IPCOMP;
539 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
540 * say specifically 'just raw sockets' as we encode them as 255.
543 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
545 return (proto == IPSEC_PROTO_ANY ? 0 : proto);
548 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
550 return (proto ? proto : IPSEC_PROTO_ANY);
553 static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
554 xfrm_address_t *xaddr)
556 switch (((struct sockaddr*)(addr + 1))->sa_family) {
559 ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
561 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
564 &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
565 sizeof(struct in6_addr));
574 static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
577 struct sadb_address *addr;
579 unsigned short family;
580 xfrm_address_t *xaddr;
582 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
586 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
590 /* sadb_address_len should be checked by caller */
591 addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
595 family = ((struct sockaddr *)(addr + 1))->sa_family;
598 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
600 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
602 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
612 return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
615 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
617 pfkey_sockaddr_size(sa_family_t family)
621 return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
622 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
624 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
632 static struct sk_buff * pfkey_xfrm_state2msg(struct xfrm_state *x, int add_keys, int hsc)
635 struct sadb_msg *hdr;
637 struct sadb_lifetime *lifetime;
638 struct sadb_address *addr;
639 struct sadb_key *key;
640 struct sadb_x_sa2 *sa2;
641 struct sockaddr_in *sin;
642 struct sadb_x_sec_ctx *sec_ctx;
643 struct xfrm_sec_ctx *xfrm_ctx;
645 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
646 struct sockaddr_in6 *sin6;
649 int auth_key_size = 0;
650 int encrypt_key_size = 0;
652 struct xfrm_encap_tmpl *natt = NULL;
654 /* address family check */
655 sockaddr_size = pfkey_sockaddr_size(x->props.family);
657 return ERR_PTR(-EINVAL);
659 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
660 key(AE), (identity(SD),) (sensitivity)> */
661 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
662 sizeof(struct sadb_lifetime) +
663 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
664 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
665 sizeof(struct sadb_address)*2 +
667 sizeof(struct sadb_x_sa2);
669 if ((xfrm_ctx = x->security)) {
670 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
671 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
674 /* identity & sensitivity */
676 if ((x->props.family == AF_INET &&
677 x->sel.saddr.a4 != x->props.saddr.a4)
678 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
679 || (x->props.family == AF_INET6 &&
680 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
683 size += sizeof(struct sadb_address) + sockaddr_size;
686 if (x->aalg && x->aalg->alg_key_len) {
688 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
689 size += sizeof(struct sadb_key) + auth_key_size;
691 if (x->ealg && x->ealg->alg_key_len) {
693 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
694 size += sizeof(struct sadb_key) + encrypt_key_size;
700 if (natt && natt->encap_type) {
701 size += sizeof(struct sadb_x_nat_t_type);
702 size += sizeof(struct sadb_x_nat_t_port);
703 size += sizeof(struct sadb_x_nat_t_port);
706 skb = alloc_skb(size + 16, GFP_ATOMIC);
708 return ERR_PTR(-ENOBUFS);
710 /* call should fill header later */
711 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
712 memset(hdr, 0, size); /* XXX do we need this ? */
713 hdr->sadb_msg_len = size / sizeof(uint64_t);
716 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
717 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
718 sa->sadb_sa_exttype = SADB_EXT_SA;
719 sa->sadb_sa_spi = x->id.spi;
720 sa->sadb_sa_replay = x->props.replay_window;
721 switch (x->km.state) {
722 case XFRM_STATE_VALID:
723 sa->sadb_sa_state = x->km.dying ?
724 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
727 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
730 sa->sadb_sa_state = SADB_SASTATE_DEAD;
733 sa->sadb_sa_auth = 0;
735 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
736 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
738 sa->sadb_sa_encrypt = 0;
739 BUG_ON(x->ealg && x->calg);
741 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
742 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
744 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
746 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
747 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
750 sa->sadb_sa_flags = 0;
751 if (x->props.flags & XFRM_STATE_NOECN)
752 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
753 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
754 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
755 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
756 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
760 lifetime = (struct sadb_lifetime *) skb_put(skb,
761 sizeof(struct sadb_lifetime));
762 lifetime->sadb_lifetime_len =
763 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
764 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
765 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
766 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
767 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
768 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
772 lifetime = (struct sadb_lifetime *) skb_put(skb,
773 sizeof(struct sadb_lifetime));
774 lifetime->sadb_lifetime_len =
775 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
776 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
777 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
778 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
779 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
780 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
783 lifetime = (struct sadb_lifetime *) skb_put(skb,
784 sizeof(struct sadb_lifetime));
785 lifetime->sadb_lifetime_len =
786 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
787 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
788 lifetime->sadb_lifetime_allocations = x->curlft.packets;
789 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
790 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
791 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
793 addr = (struct sadb_address*) skb_put(skb,
794 sizeof(struct sadb_address)+sockaddr_size);
795 addr->sadb_address_len =
796 (sizeof(struct sadb_address)+sockaddr_size)/
798 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
799 /* "if the ports are non-zero, then the sadb_address_proto field,
800 normally zero, MUST be filled in with the transport
801 protocol's number." - RFC2367 */
802 addr->sadb_address_proto = 0;
803 addr->sadb_address_reserved = 0;
804 if (x->props.family == AF_INET) {
805 addr->sadb_address_prefixlen = 32;
807 sin = (struct sockaddr_in *) (addr + 1);
808 sin->sin_family = AF_INET;
809 sin->sin_addr.s_addr = x->props.saddr.a4;
811 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
813 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
814 else if (x->props.family == AF_INET6) {
815 addr->sadb_address_prefixlen = 128;
817 sin6 = (struct sockaddr_in6 *) (addr + 1);
818 sin6->sin6_family = AF_INET6;
820 sin6->sin6_flowinfo = 0;
821 memcpy(&sin6->sin6_addr, x->props.saddr.a6,
822 sizeof(struct in6_addr));
823 sin6->sin6_scope_id = 0;
830 addr = (struct sadb_address*) skb_put(skb,
831 sizeof(struct sadb_address)+sockaddr_size);
832 addr->sadb_address_len =
833 (sizeof(struct sadb_address)+sockaddr_size)/
835 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
836 addr->sadb_address_proto = 0;
837 addr->sadb_address_prefixlen = 32; /* XXX */
838 addr->sadb_address_reserved = 0;
839 if (x->props.family == AF_INET) {
840 sin = (struct sockaddr_in *) (addr + 1);
841 sin->sin_family = AF_INET;
842 sin->sin_addr.s_addr = x->id.daddr.a4;
844 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
846 if (x->sel.saddr.a4 != x->props.saddr.a4) {
847 addr = (struct sadb_address*) skb_put(skb,
848 sizeof(struct sadb_address)+sockaddr_size);
849 addr->sadb_address_len =
850 (sizeof(struct sadb_address)+sockaddr_size)/
852 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
853 addr->sadb_address_proto =
854 pfkey_proto_from_xfrm(x->sel.proto);
855 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
856 addr->sadb_address_reserved = 0;
858 sin = (struct sockaddr_in *) (addr + 1);
859 sin->sin_family = AF_INET;
860 sin->sin_addr.s_addr = x->sel.saddr.a4;
861 sin->sin_port = x->sel.sport;
862 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
865 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
866 else if (x->props.family == AF_INET6) {
867 addr->sadb_address_prefixlen = 128;
869 sin6 = (struct sockaddr_in6 *) (addr + 1);
870 sin6->sin6_family = AF_INET6;
872 sin6->sin6_flowinfo = 0;
873 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
874 sin6->sin6_scope_id = 0;
876 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
877 sizeof(struct in6_addr))) {
878 addr = (struct sadb_address *) skb_put(skb,
879 sizeof(struct sadb_address)+sockaddr_size);
880 addr->sadb_address_len =
881 (sizeof(struct sadb_address)+sockaddr_size)/
883 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
884 addr->sadb_address_proto =
885 pfkey_proto_from_xfrm(x->sel.proto);
886 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
887 addr->sadb_address_reserved = 0;
889 sin6 = (struct sockaddr_in6 *) (addr + 1);
890 sin6->sin6_family = AF_INET6;
891 sin6->sin6_port = x->sel.sport;
892 sin6->sin6_flowinfo = 0;
893 memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
894 sizeof(struct in6_addr));
895 sin6->sin6_scope_id = 0;
903 if (add_keys && auth_key_size) {
904 key = (struct sadb_key *) skb_put(skb,
905 sizeof(struct sadb_key)+auth_key_size);
906 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
908 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
909 key->sadb_key_bits = x->aalg->alg_key_len;
910 key->sadb_key_reserved = 0;
911 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
914 if (add_keys && encrypt_key_size) {
915 key = (struct sadb_key *) skb_put(skb,
916 sizeof(struct sadb_key)+encrypt_key_size);
917 key->sadb_key_len = (sizeof(struct sadb_key) +
918 encrypt_key_size) / sizeof(uint64_t);
919 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
920 key->sadb_key_bits = x->ealg->alg_key_len;
921 key->sadb_key_reserved = 0;
922 memcpy(key + 1, x->ealg->alg_key,
923 (x->ealg->alg_key_len+7)/8);
927 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
928 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
929 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
930 sa2->sadb_x_sa2_mode = x->props.mode + 1;
931 sa2->sadb_x_sa2_reserved1 = 0;
932 sa2->sadb_x_sa2_reserved2 = 0;
933 sa2->sadb_x_sa2_sequence = 0;
934 sa2->sadb_x_sa2_reqid = x->props.reqid;
936 if (natt && natt->encap_type) {
937 struct sadb_x_nat_t_type *n_type;
938 struct sadb_x_nat_t_port *n_port;
941 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
942 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
943 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
944 n_type->sadb_x_nat_t_type_type = natt->encap_type;
945 n_type->sadb_x_nat_t_type_reserved[0] = 0;
946 n_type->sadb_x_nat_t_type_reserved[1] = 0;
947 n_type->sadb_x_nat_t_type_reserved[2] = 0;
950 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
951 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
952 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
953 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
954 n_port->sadb_x_nat_t_port_reserved = 0;
957 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
958 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
959 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
960 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
961 n_port->sadb_x_nat_t_port_reserved = 0;
964 /* security context */
966 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
967 sizeof(struct sadb_x_sec_ctx) + ctx_size);
968 sec_ctx->sadb_x_sec_len =
969 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
970 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
971 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
972 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
973 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
974 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
981 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
984 struct xfrm_state *x;
985 struct sadb_lifetime *lifetime;
987 struct sadb_key *key;
988 struct sadb_x_sec_ctx *sec_ctx;
993 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
995 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
996 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
997 return ERR_PTR(-EINVAL);
998 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
999 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1000 return ERR_PTR(-EINVAL);
1001 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1002 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1003 return ERR_PTR(-EINVAL);
1004 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1005 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1006 return ERR_PTR(-EINVAL);
1008 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1010 return ERR_PTR(-EINVAL);
1012 /* default error is no buffer space */
1017 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1018 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1019 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1020 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1021 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1024 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1025 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1027 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1028 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1029 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1030 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1031 return ERR_PTR(-EINVAL);
1032 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1034 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1035 ((key->sadb_key_bits+7) / 8 == 0 ||
1036 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1037 return ERR_PTR(-EINVAL);
1038 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1040 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1041 ((key->sadb_key_bits+7) / 8 == 0 ||
1042 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1043 return ERR_PTR(-EINVAL);
1045 x = xfrm_state_alloc();
1047 return ERR_PTR(-ENOBUFS);
1049 x->id.proto = proto;
1050 x->id.spi = sa->sadb_sa_spi;
1051 x->props.replay_window = sa->sadb_sa_replay;
1052 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1053 x->props.flags |= XFRM_STATE_NOECN;
1054 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1055 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1056 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1057 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1059 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1060 if (lifetime != NULL) {
1061 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1062 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1063 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1064 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1066 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1067 if (lifetime != NULL) {
1068 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1069 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1070 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1071 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1074 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1075 if (sec_ctx != NULL) {
1076 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1081 err = security_xfrm_state_alloc(x, uctx);
1088 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1089 if (sa->sadb_sa_auth) {
1091 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1097 keysize = (key->sadb_key_bits + 7) / 8;
1098 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1101 strcpy(x->aalg->alg_name, a->name);
1102 x->aalg->alg_key_len = 0;
1104 x->aalg->alg_key_len = key->sadb_key_bits;
1105 memcpy(x->aalg->alg_key, key+1, keysize);
1107 x->props.aalgo = sa->sadb_sa_auth;
1108 /* x->algo.flags = sa->sadb_sa_flags; */
1110 if (sa->sadb_sa_encrypt) {
1111 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1112 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1117 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1120 strcpy(x->calg->alg_name, a->name);
1121 x->props.calgo = sa->sadb_sa_encrypt;
1124 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1129 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1131 keysize = (key->sadb_key_bits + 7) / 8;
1132 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1135 strcpy(x->ealg->alg_name, a->name);
1136 x->ealg->alg_key_len = 0;
1138 x->ealg->alg_key_len = key->sadb_key_bits;
1139 memcpy(x->ealg->alg_key, key+1, keysize);
1141 x->props.ealgo = sa->sadb_sa_encrypt;
1144 /* x->algo.flags = sa->sadb_sa_flags; */
1146 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1148 if (!x->props.family) {
1149 err = -EAFNOSUPPORT;
1152 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1155 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1156 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1157 x->props.mode = sa2->sadb_x_sa2_mode;
1160 x->props.reqid = sa2->sadb_x_sa2_reqid;
1163 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1164 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1166 /* Nobody uses this, but we try. */
1167 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1168 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1171 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1172 struct sadb_x_nat_t_type* n_type;
1173 struct xfrm_encap_tmpl *natt;
1175 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1180 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1181 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1183 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1184 struct sadb_x_nat_t_port* n_port =
1185 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1186 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1188 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1189 struct sadb_x_nat_t_port* n_port =
1190 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1191 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1195 err = xfrm_init_state(x);
1199 x->km.seq = hdr->sadb_msg_seq;
1203 x->km.state = XFRM_STATE_DEAD;
1205 return ERR_PTR(err);
1208 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1213 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1215 struct sk_buff *resp_skb;
1216 struct sadb_x_sa2 *sa2;
1217 struct sadb_address *saddr, *daddr;
1218 struct sadb_msg *out_hdr;
1219 struct xfrm_state *x = NULL;
1223 unsigned short family;
1224 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1226 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1227 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1230 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1234 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1235 mode = sa2->sadb_x_sa2_mode - 1;
1236 reqid = sa2->sadb_x_sa2_reqid;
1242 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1243 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1245 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1248 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1249 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1251 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1253 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1254 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1259 if (hdr->sadb_msg_seq) {
1260 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1261 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1268 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1273 resp_skb = ERR_PTR(-ENOENT);
1275 spin_lock_bh(&x->lock);
1276 if (x->km.state != XFRM_STATE_DEAD) {
1277 struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1278 u32 min_spi, max_spi;
1280 if (range != NULL) {
1281 min_spi = range->sadb_spirange_min;
1282 max_spi = range->sadb_spirange_max;
1285 max_spi = 0x0fffffff;
1287 xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi));
1289 resp_skb = pfkey_xfrm_state2msg(x, 0, 3);
1291 spin_unlock_bh(&x->lock);
1293 if (IS_ERR(resp_skb)) {
1295 return PTR_ERR(resp_skb);
1298 out_hdr = (struct sadb_msg *) resp_skb->data;
1299 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1300 out_hdr->sadb_msg_type = SADB_GETSPI;
1301 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1302 out_hdr->sadb_msg_errno = 0;
1303 out_hdr->sadb_msg_reserved = 0;
1304 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1305 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1309 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1314 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1316 struct xfrm_state *x;
1318 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1321 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1324 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1328 spin_lock_bh(&x->lock);
1329 if (x->km.state == XFRM_STATE_ACQ) {
1330 x->km.state = XFRM_STATE_ERROR;
1333 spin_unlock_bh(&x->lock);
1338 static inline int event2poltype(int event)
1341 case XFRM_MSG_DELPOLICY:
1342 return SADB_X_SPDDELETE;
1343 case XFRM_MSG_NEWPOLICY:
1344 return SADB_X_SPDADD;
1345 case XFRM_MSG_UPDPOLICY:
1346 return SADB_X_SPDUPDATE;
1347 case XFRM_MSG_POLEXPIRE:
1348 // return SADB_X_SPDEXPIRE;
1350 printk("pfkey: Unknown policy event %d\n", event);
1357 static inline int event2keytype(int event)
1360 case XFRM_MSG_DELSA:
1362 case XFRM_MSG_NEWSA:
1364 case XFRM_MSG_UPDSA:
1366 case XFRM_MSG_EXPIRE:
1369 printk("pfkey: Unknown SA event %d\n", event);
1377 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1379 struct sk_buff *skb;
1380 struct sadb_msg *hdr;
1383 if (c->event == XFRM_MSG_DELSA)
1386 skb = pfkey_xfrm_state2msg(x, 0, hsc);
1389 return PTR_ERR(skb);
1391 hdr = (struct sadb_msg *) skb->data;
1392 hdr->sadb_msg_version = PF_KEY_V2;
1393 hdr->sadb_msg_type = event2keytype(c->event);
1394 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1395 hdr->sadb_msg_errno = 0;
1396 hdr->sadb_msg_reserved = 0;
1397 hdr->sadb_msg_seq = c->seq;
1398 hdr->sadb_msg_pid = c->pid;
1400 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1405 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1407 struct xfrm_state *x;
1413 x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1418 if (hdr->sadb_msg_type == SADB_ADD)
1419 err = xfrm_state_add(x);
1421 err = xfrm_state_update(x);
1424 x->km.state = XFRM_STATE_DEAD;
1425 __xfrm_state_put(x);
1429 if (hdr->sadb_msg_type == SADB_ADD)
1430 c.event = XFRM_MSG_NEWSA;
1432 c.event = XFRM_MSG_UPDSA;
1433 c.seq = hdr->sadb_msg_seq;
1434 c.pid = hdr->sadb_msg_pid;
1435 km_state_notify(x, &c);
1441 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1443 struct xfrm_state *x;
1447 if (!ext_hdrs[SADB_EXT_SA-1] ||
1448 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1449 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1452 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1456 if ((err = security_xfrm_state_delete(x)))
1459 if (xfrm_state_kern(x)) {
1464 err = xfrm_state_delete(x);
1468 c.seq = hdr->sadb_msg_seq;
1469 c.pid = hdr->sadb_msg_pid;
1470 c.event = XFRM_MSG_DELSA;
1471 km_state_notify(x, &c);
1478 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1481 struct sk_buff *out_skb;
1482 struct sadb_msg *out_hdr;
1483 struct xfrm_state *x;
1485 if (!ext_hdrs[SADB_EXT_SA-1] ||
1486 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1487 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1490 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1494 out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1495 proto = x->id.proto;
1497 if (IS_ERR(out_skb))
1498 return PTR_ERR(out_skb);
1500 out_hdr = (struct sadb_msg *) out_skb->data;
1501 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1502 out_hdr->sadb_msg_type = SADB_DUMP;
1503 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1504 out_hdr->sadb_msg_errno = 0;
1505 out_hdr->sadb_msg_reserved = 0;
1506 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1507 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1508 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1513 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1516 struct sk_buff *skb;
1517 struct sadb_msg *hdr;
1518 int len, auth_len, enc_len, i;
1520 auth_len = xfrm_count_auth_supported();
1522 auth_len *= sizeof(struct sadb_alg);
1523 auth_len += sizeof(struct sadb_supported);
1526 enc_len = xfrm_count_enc_supported();
1528 enc_len *= sizeof(struct sadb_alg);
1529 enc_len += sizeof(struct sadb_supported);
1532 len = enc_len + auth_len + sizeof(struct sadb_msg);
1534 skb = alloc_skb(len + 16, allocation);
1538 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1539 pfkey_hdr_dup(hdr, orig);
1540 hdr->sadb_msg_errno = 0;
1541 hdr->sadb_msg_len = len / sizeof(uint64_t);
1544 struct sadb_supported *sp;
1545 struct sadb_alg *ap;
1547 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1548 ap = (struct sadb_alg *) (sp + 1);
1550 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1551 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1553 for (i = 0; ; i++) {
1554 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1557 if (aalg->available)
1563 struct sadb_supported *sp;
1564 struct sadb_alg *ap;
1566 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1567 ap = (struct sadb_alg *) (sp + 1);
1569 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1570 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1572 for (i = 0; ; i++) {
1573 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1576 if (ealg->available)
1585 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1587 struct pfkey_sock *pfk = pfkey_sk(sk);
1588 struct sk_buff *supp_skb;
1590 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1593 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1594 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1596 pfk->registered |= (1<<hdr->sadb_msg_satype);
1601 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1603 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1604 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1609 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1614 static int key_notify_sa_flush(struct km_event *c)
1616 struct sk_buff *skb;
1617 struct sadb_msg *hdr;
1619 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1622 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1623 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1624 hdr->sadb_msg_type = SADB_FLUSH;
1625 hdr->sadb_msg_seq = c->seq;
1626 hdr->sadb_msg_pid = c->pid;
1627 hdr->sadb_msg_version = PF_KEY_V2;
1628 hdr->sadb_msg_errno = (uint8_t) 0;
1629 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1631 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1636 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1641 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1645 xfrm_state_flush(proto);
1646 c.data.proto = proto;
1647 c.seq = hdr->sadb_msg_seq;
1648 c.pid = hdr->sadb_msg_pid;
1649 c.event = XFRM_MSG_FLUSHSA;
1650 km_state_notify(NULL, &c);
1655 struct pfkey_dump_data
1657 struct sk_buff *skb;
1658 struct sadb_msg *hdr;
1662 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1664 struct pfkey_dump_data *data = ptr;
1665 struct sk_buff *out_skb;
1666 struct sadb_msg *out_hdr;
1668 out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1669 if (IS_ERR(out_skb))
1670 return PTR_ERR(out_skb);
1672 out_hdr = (struct sadb_msg *) out_skb->data;
1673 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1674 out_hdr->sadb_msg_type = SADB_DUMP;
1675 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1676 out_hdr->sadb_msg_errno = 0;
1677 out_hdr->sadb_msg_reserved = 0;
1678 out_hdr->sadb_msg_seq = count;
1679 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1680 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1684 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1687 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1689 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1693 return xfrm_state_walk(proto, dump_sa, &data);
1696 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1698 struct pfkey_sock *pfk = pfkey_sk(sk);
1699 int satype = hdr->sadb_msg_satype;
1701 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1702 /* XXX we mangle packet... */
1703 hdr->sadb_msg_errno = 0;
1704 if (satype != 0 && satype != 1)
1706 pfk->promisc = satype;
1708 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1712 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1715 u32 reqid = *(u32*)ptr;
1717 for (i=0; i<xp->xfrm_nr; i++) {
1718 if (xp->xfrm_vec[i].reqid == reqid)
1724 static u32 gen_reqid(void)
1727 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1733 reqid = IPSEC_MANUAL_REQID_MAX+1;
1734 if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid,
1735 (void*)&reqid) != -EEXIST)
1737 } while (reqid != start);
1742 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1744 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1745 struct sockaddr_in *sin;
1746 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1747 struct sockaddr_in6 *sin6;
1750 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1753 if (rq->sadb_x_ipsecrequest_mode == 0)
1756 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1757 t->mode = rq->sadb_x_ipsecrequest_mode-1;
1758 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1760 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1761 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1762 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1764 if (!t->reqid && !(t->reqid = gen_reqid()))
1768 /* addresses present only in tunnel mode */
1769 if (t->mode == XFRM_MODE_TUNNEL) {
1770 switch (xp->family) {
1772 sin = (void*)(rq+1);
1773 if (sin->sin_family != AF_INET)
1775 t->saddr.a4 = sin->sin_addr.s_addr;
1777 if (sin->sin_family != AF_INET)
1779 t->id.daddr.a4 = sin->sin_addr.s_addr;
1781 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1783 sin6 = (void *)(rq+1);
1784 if (sin6->sin6_family != AF_INET6)
1786 memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1788 if (sin6->sin6_family != AF_INET6)
1790 memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1797 /* No way to set this via kame pfkey */
1798 t->aalgos = t->ealgos = t->calgos = ~0;
1804 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1807 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1808 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1810 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1811 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1813 len -= rq->sadb_x_ipsecrequest_len;
1814 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1819 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1821 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1824 int len = sizeof(struct sadb_x_sec_ctx);
1825 len += xfrm_ctx->ctx_len;
1826 return PFKEY_ALIGN8(len);
1831 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1833 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1834 int socklen = (xp->family == AF_INET ?
1835 sizeof(struct sockaddr_in) :
1836 sizeof(struct sockaddr_in6));
1838 return sizeof(struct sadb_msg) +
1839 (sizeof(struct sadb_lifetime) * 3) +
1840 (sizeof(struct sadb_address) * 2) +
1841 (sockaddr_size * 2) +
1842 sizeof(struct sadb_x_policy) +
1843 (xp->xfrm_nr * (sizeof(struct sadb_x_ipsecrequest) +
1845 pfkey_xfrm_policy2sec_ctx_size(xp);
1848 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1850 struct sk_buff *skb;
1853 size = pfkey_xfrm_policy2msg_size(xp);
1855 skb = alloc_skb(size + 16, GFP_ATOMIC);
1857 return ERR_PTR(-ENOBUFS);
1862 static void pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1864 struct sadb_msg *hdr;
1865 struct sadb_address *addr;
1866 struct sadb_lifetime *lifetime;
1867 struct sadb_x_policy *pol;
1868 struct sockaddr_in *sin;
1869 struct sadb_x_sec_ctx *sec_ctx;
1870 struct xfrm_sec_ctx *xfrm_ctx;
1871 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1872 struct sockaddr_in6 *sin6;
1876 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1877 int socklen = (xp->family == AF_INET ?
1878 sizeof(struct sockaddr_in) :
1879 sizeof(struct sockaddr_in6));
1881 size = pfkey_xfrm_policy2msg_size(xp);
1883 /* call should fill header later */
1884 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1885 memset(hdr, 0, size); /* XXX do we need this ? */
1888 addr = (struct sadb_address*) skb_put(skb,
1889 sizeof(struct sadb_address)+sockaddr_size);
1890 addr->sadb_address_len =
1891 (sizeof(struct sadb_address)+sockaddr_size)/
1893 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1894 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1895 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1896 addr->sadb_address_reserved = 0;
1898 if (xp->family == AF_INET) {
1899 sin = (struct sockaddr_in *) (addr + 1);
1900 sin->sin_family = AF_INET;
1901 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1902 sin->sin_port = xp->selector.sport;
1903 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1905 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1906 else if (xp->family == AF_INET6) {
1907 sin6 = (struct sockaddr_in6 *) (addr + 1);
1908 sin6->sin6_family = AF_INET6;
1909 sin6->sin6_port = xp->selector.sport;
1910 sin6->sin6_flowinfo = 0;
1911 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1912 sizeof(struct in6_addr));
1913 sin6->sin6_scope_id = 0;
1920 addr = (struct sadb_address*) skb_put(skb,
1921 sizeof(struct sadb_address)+sockaddr_size);
1922 addr->sadb_address_len =
1923 (sizeof(struct sadb_address)+sockaddr_size)/
1925 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1926 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1927 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1928 addr->sadb_address_reserved = 0;
1929 if (xp->family == AF_INET) {
1930 sin = (struct sockaddr_in *) (addr + 1);
1931 sin->sin_family = AF_INET;
1932 sin->sin_addr.s_addr = xp->selector.daddr.a4;
1933 sin->sin_port = xp->selector.dport;
1934 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1936 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1937 else if (xp->family == AF_INET6) {
1938 sin6 = (struct sockaddr_in6 *) (addr + 1);
1939 sin6->sin6_family = AF_INET6;
1940 sin6->sin6_port = xp->selector.dport;
1941 sin6->sin6_flowinfo = 0;
1942 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
1943 sizeof(struct in6_addr));
1944 sin6->sin6_scope_id = 0;
1951 lifetime = (struct sadb_lifetime *) skb_put(skb,
1952 sizeof(struct sadb_lifetime));
1953 lifetime->sadb_lifetime_len =
1954 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
1955 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
1956 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
1957 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
1958 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
1959 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
1961 lifetime = (struct sadb_lifetime *) skb_put(skb,
1962 sizeof(struct sadb_lifetime));
1963 lifetime->sadb_lifetime_len =
1964 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
1965 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
1966 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
1967 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
1968 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
1969 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
1971 lifetime = (struct sadb_lifetime *) skb_put(skb,
1972 sizeof(struct sadb_lifetime));
1973 lifetime->sadb_lifetime_len =
1974 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
1975 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
1976 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
1977 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
1978 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
1979 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
1981 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
1982 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
1983 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
1984 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
1985 if (xp->action == XFRM_POLICY_ALLOW) {
1987 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
1989 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
1991 pol->sadb_x_policy_dir = dir+1;
1992 pol->sadb_x_policy_id = xp->index;
1993 pol->sadb_x_policy_priority = xp->priority;
1995 for (i=0; i<xp->xfrm_nr; i++) {
1996 struct sadb_x_ipsecrequest *rq;
1997 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2000 req_size = sizeof(struct sadb_x_ipsecrequest);
2001 if (t->mode == XFRM_MODE_TUNNEL)
2002 req_size += 2*socklen;
2005 rq = (void*)skb_put(skb, req_size);
2006 pol->sadb_x_policy_len += req_size/8;
2007 memset(rq, 0, sizeof(*rq));
2008 rq->sadb_x_ipsecrequest_len = req_size;
2009 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2010 rq->sadb_x_ipsecrequest_mode = t->mode+1;
2011 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2013 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2015 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2016 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2017 if (t->mode == XFRM_MODE_TUNNEL) {
2018 switch (xp->family) {
2020 sin = (void*)(rq+1);
2021 sin->sin_family = AF_INET;
2022 sin->sin_addr.s_addr = t->saddr.a4;
2024 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2026 sin->sin_family = AF_INET;
2027 sin->sin_addr.s_addr = t->id.daddr.a4;
2029 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2031 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2033 sin6 = (void*)(rq+1);
2034 sin6->sin6_family = AF_INET6;
2035 sin6->sin6_port = 0;
2036 sin6->sin6_flowinfo = 0;
2037 memcpy(&sin6->sin6_addr, t->saddr.a6,
2038 sizeof(struct in6_addr));
2039 sin6->sin6_scope_id = 0;
2042 sin6->sin6_family = AF_INET6;
2043 sin6->sin6_port = 0;
2044 sin6->sin6_flowinfo = 0;
2045 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2046 sizeof(struct in6_addr));
2047 sin6->sin6_scope_id = 0;
2056 /* security context */
2057 if ((xfrm_ctx = xp->security)) {
2058 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2060 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2061 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2062 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2063 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2064 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2065 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2066 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2070 hdr->sadb_msg_len = size / sizeof(uint64_t);
2071 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2074 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2076 struct sk_buff *out_skb;
2077 struct sadb_msg *out_hdr;
2080 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2081 if (IS_ERR(out_skb)) {
2082 err = PTR_ERR(out_skb);
2085 pfkey_xfrm_policy2msg(out_skb, xp, dir);
2087 out_hdr = (struct sadb_msg *) out_skb->data;
2088 out_hdr->sadb_msg_version = PF_KEY_V2;
2090 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2091 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2093 out_hdr->sadb_msg_type = event2poltype(c->event);
2094 out_hdr->sadb_msg_errno = 0;
2095 out_hdr->sadb_msg_seq = c->seq;
2096 out_hdr->sadb_msg_pid = c->pid;
2097 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2103 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2106 struct sadb_lifetime *lifetime;
2107 struct sadb_address *sa;
2108 struct sadb_x_policy *pol;
2109 struct xfrm_policy *xp;
2111 struct sadb_x_sec_ctx *sec_ctx;
2113 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2114 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2115 !ext_hdrs[SADB_X_EXT_POLICY-1])
2118 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2119 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2121 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2124 xp = xfrm_policy_alloc(GFP_KERNEL);
2128 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2129 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2130 xp->priority = pol->sadb_x_policy_priority;
2132 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2133 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2138 xp->selector.family = xp->family;
2139 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2140 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2141 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2142 if (xp->selector.sport)
2143 xp->selector.sport_mask = ~0;
2145 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2146 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2147 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2149 /* Amusing, we set this twice. KAME apps appear to set same value
2150 * in both addresses.
2152 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2154 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2155 if (xp->selector.dport)
2156 xp->selector.dport_mask = ~0;
2158 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2159 if (sec_ctx != NULL) {
2160 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2167 err = security_xfrm_policy_alloc(xp, uctx);
2174 xp->lft.soft_byte_limit = XFRM_INF;
2175 xp->lft.hard_byte_limit = XFRM_INF;
2176 xp->lft.soft_packet_limit = XFRM_INF;
2177 xp->lft.hard_packet_limit = XFRM_INF;
2178 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2179 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2180 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2181 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2182 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2184 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2185 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2186 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2187 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2188 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2191 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2192 (err = parse_ipsecrequests(xp, pol)) < 0)
2195 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2196 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2201 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2202 c.event = XFRM_MSG_UPDPOLICY;
2204 c.event = XFRM_MSG_NEWPOLICY;
2206 c.seq = hdr->sadb_msg_seq;
2207 c.pid = hdr->sadb_msg_pid;
2209 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2214 security_xfrm_policy_free(xp);
2219 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2222 struct sadb_address *sa;
2223 struct sadb_x_policy *pol;
2224 struct xfrm_policy *xp, tmp;
2225 struct xfrm_selector sel;
2227 struct sadb_x_sec_ctx *sec_ctx;
2229 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2230 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2231 !ext_hdrs[SADB_X_EXT_POLICY-1])
2234 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2235 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2238 memset(&sel, 0, sizeof(sel));
2240 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2241 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2242 sel.prefixlen_s = sa->sadb_address_prefixlen;
2243 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2244 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2246 sel.sport_mask = ~0;
2248 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2249 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2250 sel.prefixlen_d = sa->sadb_address_prefixlen;
2251 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2252 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2254 sel.dport_mask = ~0;
2256 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2257 memset(&tmp, 0, sizeof(struct xfrm_policy));
2259 if (sec_ctx != NULL) {
2260 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2265 err = security_xfrm_policy_alloc(&tmp, uctx);
2272 xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
2273 &sel, tmp.security, 1);
2274 security_xfrm_policy_free(&tmp);
2280 if ((err = security_xfrm_policy_delete(xp)))
2282 c.seq = hdr->sadb_msg_seq;
2283 c.pid = hdr->sadb_msg_pid;
2284 c.event = XFRM_MSG_DELPOLICY;
2285 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2292 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2295 struct sk_buff *out_skb;
2296 struct sadb_msg *out_hdr;
2299 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2300 if (IS_ERR(out_skb)) {
2301 err = PTR_ERR(out_skb);
2304 pfkey_xfrm_policy2msg(out_skb, xp, dir);
2306 out_hdr = (struct sadb_msg *) out_skb->data;
2307 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2308 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2309 out_hdr->sadb_msg_satype = 0;
2310 out_hdr->sadb_msg_errno = 0;
2311 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2312 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2313 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2320 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2324 struct sadb_x_policy *pol;
2325 struct xfrm_policy *xp;
2328 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2331 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2332 if (dir >= XFRM_POLICY_MAX)
2335 xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2336 hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2342 c.seq = hdr->sadb_msg_seq;
2343 c.pid = hdr->sadb_msg_pid;
2344 if (hdr->sadb_msg_type == SADB_X_SPDDELETE2) {
2346 c.event = XFRM_MSG_DELPOLICY;
2347 km_policy_notify(xp, dir, &c);
2349 err = key_pol_get_resp(sk, xp, hdr, dir);
2356 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2358 struct pfkey_dump_data *data = ptr;
2359 struct sk_buff *out_skb;
2360 struct sadb_msg *out_hdr;
2362 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2363 if (IS_ERR(out_skb))
2364 return PTR_ERR(out_skb);
2366 pfkey_xfrm_policy2msg(out_skb, xp, dir);
2368 out_hdr = (struct sadb_msg *) out_skb->data;
2369 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2370 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2371 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2372 out_hdr->sadb_msg_errno = 0;
2373 out_hdr->sadb_msg_seq = count;
2374 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2375 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2379 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2381 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2383 return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data);
2386 static int key_notify_policy_flush(struct km_event *c)
2388 struct sk_buff *skb_out;
2389 struct sadb_msg *hdr;
2391 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2394 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2395 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2396 hdr->sadb_msg_seq = c->seq;
2397 hdr->sadb_msg_pid = c->pid;
2398 hdr->sadb_msg_version = PF_KEY_V2;
2399 hdr->sadb_msg_errno = (uint8_t) 0;
2400 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2401 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2406 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2410 xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN);
2411 c.data.type = XFRM_POLICY_TYPE_MAIN;
2412 c.event = XFRM_MSG_FLUSHPOLICY;
2413 c.pid = hdr->sadb_msg_pid;
2414 c.seq = hdr->sadb_msg_seq;
2415 km_policy_notify(NULL, 0, &c);
2420 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2421 struct sadb_msg *hdr, void **ext_hdrs);
2422 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2423 [SADB_RESERVED] = pfkey_reserved,
2424 [SADB_GETSPI] = pfkey_getspi,
2425 [SADB_UPDATE] = pfkey_add,
2426 [SADB_ADD] = pfkey_add,
2427 [SADB_DELETE] = pfkey_delete,
2428 [SADB_GET] = pfkey_get,
2429 [SADB_ACQUIRE] = pfkey_acquire,
2430 [SADB_REGISTER] = pfkey_register,
2431 [SADB_EXPIRE] = NULL,
2432 [SADB_FLUSH] = pfkey_flush,
2433 [SADB_DUMP] = pfkey_dump,
2434 [SADB_X_PROMISC] = pfkey_promisc,
2435 [SADB_X_PCHANGE] = NULL,
2436 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2437 [SADB_X_SPDADD] = pfkey_spdadd,
2438 [SADB_X_SPDDELETE] = pfkey_spddelete,
2439 [SADB_X_SPDGET] = pfkey_spdget,
2440 [SADB_X_SPDACQUIRE] = NULL,
2441 [SADB_X_SPDDUMP] = pfkey_spddump,
2442 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2443 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2444 [SADB_X_SPDDELETE2] = pfkey_spdget,
2447 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2449 void *ext_hdrs[SADB_EXT_MAX];
2452 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2453 BROADCAST_PROMISC_ONLY, NULL);
2455 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2456 err = parse_exthdrs(skb, hdr, ext_hdrs);
2459 if (pfkey_funcs[hdr->sadb_msg_type])
2460 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2465 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2467 struct sadb_msg *hdr = NULL;
2469 if (skb->len < sizeof(*hdr)) {
2472 hdr = (struct sadb_msg *) skb->data;
2473 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2474 hdr->sadb_msg_reserved != 0 ||
2475 (hdr->sadb_msg_type <= SADB_RESERVED ||
2476 hdr->sadb_msg_type > SADB_MAX)) {
2479 } else if (hdr->sadb_msg_len != (skb->len /
2480 sizeof(uint64_t)) ||
2481 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2482 sizeof(uint64_t))) {
2492 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2494 return t->aalgos & (1 << d->desc.sadb_alg_id);
2497 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2499 return t->ealgos & (1 << d->desc.sadb_alg_id);
2502 static int count_ah_combs(struct xfrm_tmpl *t)
2506 for (i = 0; ; i++) {
2507 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2510 if (aalg_tmpl_set(t, aalg) && aalg->available)
2511 sz += sizeof(struct sadb_comb);
2513 return sz + sizeof(struct sadb_prop);
2516 static int count_esp_combs(struct xfrm_tmpl *t)
2520 for (i = 0; ; i++) {
2521 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2525 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2528 for (k = 1; ; k++) {
2529 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2533 if (aalg_tmpl_set(t, aalg) && aalg->available)
2534 sz += sizeof(struct sadb_comb);
2537 return sz + sizeof(struct sadb_prop);
2540 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2542 struct sadb_prop *p;
2545 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2546 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2547 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2548 p->sadb_prop_replay = 32;
2549 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2551 for (i = 0; ; i++) {
2552 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2556 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2557 struct sadb_comb *c;
2558 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2559 memset(c, 0, sizeof(*c));
2560 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2561 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2562 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2563 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2564 c->sadb_comb_hard_addtime = 24*60*60;
2565 c->sadb_comb_soft_addtime = 20*60*60;
2566 c->sadb_comb_hard_usetime = 8*60*60;
2567 c->sadb_comb_soft_usetime = 7*60*60;
2572 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2574 struct sadb_prop *p;
2577 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2578 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2579 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2580 p->sadb_prop_replay = 32;
2581 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2584 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2588 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2591 for (k = 1; ; k++) {
2592 struct sadb_comb *c;
2593 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2596 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2598 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2599 memset(c, 0, sizeof(*c));
2600 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2601 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2602 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2603 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2604 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2605 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2606 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2607 c->sadb_comb_hard_addtime = 24*60*60;
2608 c->sadb_comb_soft_addtime = 20*60*60;
2609 c->sadb_comb_hard_usetime = 8*60*60;
2610 c->sadb_comb_soft_usetime = 7*60*60;
2615 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2620 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2622 struct sk_buff *out_skb;
2623 struct sadb_msg *out_hdr;
2627 hard = c->data.hard;
2633 out_skb = pfkey_xfrm_state2msg(x, 0, hsc);
2634 if (IS_ERR(out_skb))
2635 return PTR_ERR(out_skb);
2637 out_hdr = (struct sadb_msg *) out_skb->data;
2638 out_hdr->sadb_msg_version = PF_KEY_V2;
2639 out_hdr->sadb_msg_type = SADB_EXPIRE;
2640 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2641 out_hdr->sadb_msg_errno = 0;
2642 out_hdr->sadb_msg_reserved = 0;
2643 out_hdr->sadb_msg_seq = 0;
2644 out_hdr->sadb_msg_pid = 0;
2646 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2650 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2653 case XFRM_MSG_EXPIRE:
2654 return key_notify_sa_expire(x, c);
2655 case XFRM_MSG_DELSA:
2656 case XFRM_MSG_NEWSA:
2657 case XFRM_MSG_UPDSA:
2658 return key_notify_sa(x, c);
2659 case XFRM_MSG_FLUSHSA:
2660 return key_notify_sa_flush(c);
2661 case XFRM_MSG_NEWAE: /* not yet supported */
2664 printk("pfkey: Unknown SA event %d\n", c->event);
2671 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2673 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2677 case XFRM_MSG_POLEXPIRE:
2678 return key_notify_policy_expire(xp, c);
2679 case XFRM_MSG_DELPOLICY:
2680 case XFRM_MSG_NEWPOLICY:
2681 case XFRM_MSG_UPDPOLICY:
2682 return key_notify_policy(xp, dir, c);
2683 case XFRM_MSG_FLUSHPOLICY:
2684 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2686 return key_notify_policy_flush(c);
2688 printk("pfkey: Unknown policy event %d\n", c->event);
2695 static u32 get_acqseq(void)
2699 static DEFINE_SPINLOCK(acqseq_lock);
2701 spin_lock_bh(&acqseq_lock);
2702 res = (++acqseq ? : ++acqseq);
2703 spin_unlock_bh(&acqseq_lock);
2707 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
2709 struct sk_buff *skb;
2710 struct sadb_msg *hdr;
2711 struct sadb_address *addr;
2712 struct sadb_x_policy *pol;
2713 struct sockaddr_in *sin;
2714 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2715 struct sockaddr_in6 *sin6;
2719 struct sadb_x_sec_ctx *sec_ctx;
2720 struct xfrm_sec_ctx *xfrm_ctx;
2723 sockaddr_size = pfkey_sockaddr_size(x->props.family);
2727 size = sizeof(struct sadb_msg) +
2728 (sizeof(struct sadb_address) * 2) +
2729 (sockaddr_size * 2) +
2730 sizeof(struct sadb_x_policy);
2732 if (x->id.proto == IPPROTO_AH)
2733 size += count_ah_combs(t);
2734 else if (x->id.proto == IPPROTO_ESP)
2735 size += count_esp_combs(t);
2737 if ((xfrm_ctx = x->security)) {
2738 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
2739 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
2742 skb = alloc_skb(size + 16, GFP_ATOMIC);
2746 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2747 hdr->sadb_msg_version = PF_KEY_V2;
2748 hdr->sadb_msg_type = SADB_ACQUIRE;
2749 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2750 hdr->sadb_msg_len = size / sizeof(uint64_t);
2751 hdr->sadb_msg_errno = 0;
2752 hdr->sadb_msg_reserved = 0;
2753 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
2754 hdr->sadb_msg_pid = 0;
2757 addr = (struct sadb_address*) skb_put(skb,
2758 sizeof(struct sadb_address)+sockaddr_size);
2759 addr->sadb_address_len =
2760 (sizeof(struct sadb_address)+sockaddr_size)/
2762 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2763 addr->sadb_address_proto = 0;
2764 addr->sadb_address_reserved = 0;
2765 if (x->props.family == AF_INET) {
2766 addr->sadb_address_prefixlen = 32;
2768 sin = (struct sockaddr_in *) (addr + 1);
2769 sin->sin_family = AF_INET;
2770 sin->sin_addr.s_addr = x->props.saddr.a4;
2772 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2774 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2775 else if (x->props.family == AF_INET6) {
2776 addr->sadb_address_prefixlen = 128;
2778 sin6 = (struct sockaddr_in6 *) (addr + 1);
2779 sin6->sin6_family = AF_INET6;
2780 sin6->sin6_port = 0;
2781 sin6->sin6_flowinfo = 0;
2782 memcpy(&sin6->sin6_addr,
2783 x->props.saddr.a6, sizeof(struct in6_addr));
2784 sin6->sin6_scope_id = 0;
2791 addr = (struct sadb_address*) skb_put(skb,
2792 sizeof(struct sadb_address)+sockaddr_size);
2793 addr->sadb_address_len =
2794 (sizeof(struct sadb_address)+sockaddr_size)/
2796 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2797 addr->sadb_address_proto = 0;
2798 addr->sadb_address_reserved = 0;
2799 if (x->props.family == AF_INET) {
2800 addr->sadb_address_prefixlen = 32;
2802 sin = (struct sockaddr_in *) (addr + 1);
2803 sin->sin_family = AF_INET;
2804 sin->sin_addr.s_addr = x->id.daddr.a4;
2806 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2808 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2809 else if (x->props.family == AF_INET6) {
2810 addr->sadb_address_prefixlen = 128;
2812 sin6 = (struct sockaddr_in6 *) (addr + 1);
2813 sin6->sin6_family = AF_INET6;
2814 sin6->sin6_port = 0;
2815 sin6->sin6_flowinfo = 0;
2816 memcpy(&sin6->sin6_addr,
2817 x->id.daddr.a6, sizeof(struct in6_addr));
2818 sin6->sin6_scope_id = 0;
2824 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2825 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2826 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2827 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2828 pol->sadb_x_policy_dir = dir+1;
2829 pol->sadb_x_policy_id = xp->index;
2831 /* Set sadb_comb's. */
2832 if (x->id.proto == IPPROTO_AH)
2833 dump_ah_combs(skb, t);
2834 else if (x->id.proto == IPPROTO_ESP)
2835 dump_esp_combs(skb, t);
2837 /* security context */
2839 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
2840 sizeof(struct sadb_x_sec_ctx) + ctx_size);
2841 sec_ctx->sadb_x_sec_len =
2842 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
2843 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2844 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2845 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2846 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2847 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2851 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2854 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
2855 u8 *data, int len, int *dir)
2857 struct xfrm_policy *xp;
2858 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
2859 struct sadb_x_sec_ctx *sec_ctx;
2861 switch (sk->sk_family) {
2863 if (opt != IP_IPSEC_POLICY) {
2868 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2870 if (opt != IPV6_IPSEC_POLICY) {
2883 if (len < sizeof(struct sadb_x_policy) ||
2884 pol->sadb_x_policy_len*8 > len ||
2885 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
2886 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
2889 xp = xfrm_policy_alloc(GFP_ATOMIC);
2895 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2896 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2898 xp->lft.soft_byte_limit = XFRM_INF;
2899 xp->lft.hard_byte_limit = XFRM_INF;
2900 xp->lft.soft_packet_limit = XFRM_INF;
2901 xp->lft.hard_packet_limit = XFRM_INF;
2902 xp->family = sk->sk_family;
2905 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2906 (*dir = parse_ipsecrequests(xp, pol)) < 0)
2909 /* security context too */
2910 if (len >= (pol->sadb_x_policy_len*8 +
2911 sizeof(struct sadb_x_sec_ctx))) {
2912 char *p = (char *)pol;
2913 struct xfrm_user_sec_ctx *uctx;
2915 p += pol->sadb_x_policy_len*8;
2916 sec_ctx = (struct sadb_x_sec_ctx *)p;
2917 if (len < pol->sadb_x_policy_len*8 +
2918 sec_ctx->sadb_x_sec_len) {
2922 if ((*dir = verify_sec_ctx_len(p)))
2924 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2925 *dir = security_xfrm_policy_alloc(xp, uctx);
2932 *dir = security_xfrm_sock_policy_alloc(xp, sk);
2937 *dir = pol->sadb_x_policy_dir-1;
2941 security_xfrm_policy_free(xp);
2946 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport)
2948 struct sk_buff *skb;
2949 struct sadb_msg *hdr;
2951 struct sadb_address *addr;
2952 struct sadb_x_nat_t_port *n_port;
2953 struct sockaddr_in *sin;
2954 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2955 struct sockaddr_in6 *sin6;
2959 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
2960 struct xfrm_encap_tmpl *natt = NULL;
2962 sockaddr_size = pfkey_sockaddr_size(x->props.family);
2974 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
2976 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
2977 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
2980 size = sizeof(struct sadb_msg) +
2981 sizeof(struct sadb_sa) +
2982 (sizeof(struct sadb_address) * 2) +
2983 (sockaddr_size * 2) +
2984 (sizeof(struct sadb_x_nat_t_port) * 2);
2986 skb = alloc_skb(size + 16, GFP_ATOMIC);
2990 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2991 hdr->sadb_msg_version = PF_KEY_V2;
2992 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
2993 hdr->sadb_msg_satype = satype;
2994 hdr->sadb_msg_len = size / sizeof(uint64_t);
2995 hdr->sadb_msg_errno = 0;
2996 hdr->sadb_msg_reserved = 0;
2997 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
2998 hdr->sadb_msg_pid = 0;
3001 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3002 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3003 sa->sadb_sa_exttype = SADB_EXT_SA;
3004 sa->sadb_sa_spi = x->id.spi;
3005 sa->sadb_sa_replay = 0;
3006 sa->sadb_sa_state = 0;
3007 sa->sadb_sa_auth = 0;
3008 sa->sadb_sa_encrypt = 0;
3009 sa->sadb_sa_flags = 0;
3011 /* ADDRESS_SRC (old addr) */
3012 addr = (struct sadb_address*)
3013 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3014 addr->sadb_address_len =
3015 (sizeof(struct sadb_address)+sockaddr_size)/
3017 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3018 addr->sadb_address_proto = 0;
3019 addr->sadb_address_reserved = 0;
3020 if (x->props.family == AF_INET) {
3021 addr->sadb_address_prefixlen = 32;
3023 sin = (struct sockaddr_in *) (addr + 1);
3024 sin->sin_family = AF_INET;
3025 sin->sin_addr.s_addr = x->props.saddr.a4;
3027 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3029 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3030 else if (x->props.family == AF_INET6) {
3031 addr->sadb_address_prefixlen = 128;
3033 sin6 = (struct sockaddr_in6 *) (addr + 1);
3034 sin6->sin6_family = AF_INET6;
3035 sin6->sin6_port = 0;
3036 sin6->sin6_flowinfo = 0;
3037 memcpy(&sin6->sin6_addr,
3038 x->props.saddr.a6, sizeof(struct in6_addr));
3039 sin6->sin6_scope_id = 0;
3045 /* NAT_T_SPORT (old port) */
3046 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3047 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3048 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3049 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3050 n_port->sadb_x_nat_t_port_reserved = 0;
3052 /* ADDRESS_DST (new addr) */
3053 addr = (struct sadb_address*)
3054 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3055 addr->sadb_address_len =
3056 (sizeof(struct sadb_address)+sockaddr_size)/
3058 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3059 addr->sadb_address_proto = 0;
3060 addr->sadb_address_reserved = 0;
3061 if (x->props.family == AF_INET) {
3062 addr->sadb_address_prefixlen = 32;
3064 sin = (struct sockaddr_in *) (addr + 1);
3065 sin->sin_family = AF_INET;
3066 sin->sin_addr.s_addr = ipaddr->a4;
3068 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3070 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3071 else if (x->props.family == AF_INET6) {
3072 addr->sadb_address_prefixlen = 128;
3074 sin6 = (struct sockaddr_in6 *) (addr + 1);
3075 sin6->sin6_family = AF_INET6;
3076 sin6->sin6_port = 0;
3077 sin6->sin6_flowinfo = 0;
3078 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3079 sin6->sin6_scope_id = 0;
3085 /* NAT_T_DPORT (new port) */
3086 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3087 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3088 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3089 n_port->sadb_x_nat_t_port_port = sport;
3090 n_port->sadb_x_nat_t_port_reserved = 0;
3092 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3095 static int pfkey_sendmsg(struct kiocb *kiocb,
3096 struct socket *sock, struct msghdr *msg, size_t len)
3098 struct sock *sk = sock->sk;
3099 struct sk_buff *skb = NULL;
3100 struct sadb_msg *hdr = NULL;
3104 if (msg->msg_flags & MSG_OOB)
3108 if ((unsigned)len > sk->sk_sndbuf - 32)
3112 skb = alloc_skb(len, GFP_KERNEL);
3117 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3120 hdr = pfkey_get_base_msg(skb, &err);
3124 mutex_lock(&xfrm_cfg_mutex);
3125 err = pfkey_process(sk, skb, hdr);
3126 mutex_unlock(&xfrm_cfg_mutex);
3129 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3137 static int pfkey_recvmsg(struct kiocb *kiocb,
3138 struct socket *sock, struct msghdr *msg, size_t len,
3141 struct sock *sk = sock->sk;
3142 struct sk_buff *skb;
3146 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3149 msg->msg_namelen = 0;
3150 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3156 msg->msg_flags |= MSG_TRUNC;
3160 skb->h.raw = skb->data;
3161 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3165 sock_recv_timestamp(msg, sk, skb);
3167 err = (flags & MSG_TRUNC) ? skb->len : copied;
3170 skb_free_datagram(sk, skb);
3175 static const struct proto_ops pfkey_ops = {
3177 .owner = THIS_MODULE,
3178 /* Operations that make no sense on pfkey sockets. */
3179 .bind = sock_no_bind,
3180 .connect = sock_no_connect,
3181 .socketpair = sock_no_socketpair,
3182 .accept = sock_no_accept,
3183 .getname = sock_no_getname,
3184 .ioctl = sock_no_ioctl,
3185 .listen = sock_no_listen,
3186 .shutdown = sock_no_shutdown,
3187 .setsockopt = sock_no_setsockopt,
3188 .getsockopt = sock_no_getsockopt,
3189 .mmap = sock_no_mmap,
3190 .sendpage = sock_no_sendpage,
3192 /* Now the operations that really occur. */
3193 .release = pfkey_release,
3194 .poll = datagram_poll,
3195 .sendmsg = pfkey_sendmsg,
3196 .recvmsg = pfkey_recvmsg,
3199 static struct net_proto_family pfkey_family_ops = {
3201 .create = pfkey_create,
3202 .owner = THIS_MODULE,
3205 #ifdef CONFIG_PROC_FS
3206 static int pfkey_read_proc(char *buffer, char **start, off_t offset,
3207 int length, int *eof, void *data)
3213 struct hlist_node *node;
3215 len += sprintf(buffer,"sk RefCnt Rmem Wmem User Inode\n");
3217 read_lock(&pfkey_table_lock);
3219 sk_for_each(s, node, &pfkey_table) {
3220 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
3222 atomic_read(&s->sk_refcnt),
3223 atomic_read(&s->sk_rmem_alloc),
3224 atomic_read(&s->sk_wmem_alloc),
3229 buffer[len++] = '\n';
3236 if(pos > offset + length)
3242 read_unlock(&pfkey_table_lock);
3244 *start = buffer + (offset - begin);
3245 len -= (offset - begin);
3256 static struct xfrm_mgr pfkeyv2_mgr =
3259 .notify = pfkey_send_notify,
3260 .acquire = pfkey_send_acquire,
3261 .compile_policy = pfkey_compile_policy,
3262 .new_mapping = pfkey_send_new_mapping,
3263 .notify_policy = pfkey_send_policy_notify,
3266 static void __exit ipsec_pfkey_exit(void)
3268 xfrm_unregister_km(&pfkeyv2_mgr);
3269 remove_proc_entry("net/pfkey", NULL);
3270 sock_unregister(PF_KEY);
3271 proto_unregister(&key_proto);
3274 static int __init ipsec_pfkey_init(void)
3276 int err = proto_register(&key_proto, 0);
3281 err = sock_register(&pfkey_family_ops);
3283 goto out_unregister_key_proto;
3284 #ifdef CONFIG_PROC_FS
3286 if (create_proc_read_entry("net/pfkey", 0, NULL, pfkey_read_proc, NULL) == NULL)
3287 goto out_sock_unregister;
3289 err = xfrm_register_km(&pfkeyv2_mgr);
3291 goto out_remove_proc_entry;
3294 out_remove_proc_entry:
3295 #ifdef CONFIG_PROC_FS
3296 remove_proc_entry("net/pfkey", NULL);
3297 out_sock_unregister:
3299 sock_unregister(PF_KEY);
3300 out_unregister_key_proto:
3301 proto_unregister(&key_proto);
3305 module_init(ipsec_pfkey_init);
3306 module_exit(ipsec_pfkey_exit);
3307 MODULE_LICENSE("GPL");
3308 MODULE_ALIAS_NETPROTO(PF_KEY);