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/config.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 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 int 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, int 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 if (err <= 0 || err >= 256)
303 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
304 pfkey_hdr_dup(hdr, orig);
305 hdr->sadb_msg_errno = (uint8_t) err;
306 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
309 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
314 static u8 sadb_ext_min_len[] = {
315 [SADB_EXT_RESERVED] = (u8) 0,
316 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
317 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
318 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
319 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
320 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
321 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
322 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
323 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
324 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
325 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
326 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
327 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
328 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
329 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
330 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
331 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
332 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
333 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
334 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
335 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
336 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
337 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
338 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
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 int present_and_same_family(struct sadb_address *src,
387 struct sadb_address *dst)
389 struct sockaddr *s_addr, *d_addr;
394 s_addr = (struct sockaddr *)(src + 1);
395 d_addr = (struct sockaddr *)(dst + 1);
396 if (s_addr->sa_family != d_addr->sa_family)
398 if (s_addr->sa_family != AF_INET
399 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
400 && s_addr->sa_family != AF_INET6
408 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
410 char *p = (char *) hdr;
416 struct sadb_ext *ehdr = (struct sadb_ext *) p;
420 ext_len = ehdr->sadb_ext_len;
421 ext_len *= sizeof(uint64_t);
422 ext_type = ehdr->sadb_ext_type;
423 if (ext_len < sizeof(uint64_t) ||
425 ext_type == SADB_EXT_RESERVED)
428 if (ext_type <= SADB_EXT_MAX) {
429 int min = (int) sadb_ext_min_len[ext_type];
432 if (ext_hdrs[ext_type-1] != NULL)
434 if (ext_type == SADB_EXT_ADDRESS_SRC ||
435 ext_type == SADB_EXT_ADDRESS_DST ||
436 ext_type == SADB_EXT_ADDRESS_PROXY ||
437 ext_type == SADB_X_EXT_NAT_T_OA) {
438 if (verify_address_len(p))
441 ext_hdrs[ext_type-1] = p;
451 pfkey_satype2proto(uint8_t satype)
454 case SADB_SATYPE_UNSPEC:
455 return IPSEC_PROTO_ANY;
458 case SADB_SATYPE_ESP:
460 case SADB_X_SATYPE_IPCOMP:
470 pfkey_proto2satype(uint16_t proto)
474 return SADB_SATYPE_AH;
476 return SADB_SATYPE_ESP;
478 return SADB_X_SATYPE_IPCOMP;
486 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
487 * say specifically 'just raw sockets' as we encode them as 255.
490 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
492 return (proto == IPSEC_PROTO_ANY ? 0 : proto);
495 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
497 return (proto ? proto : IPSEC_PROTO_ANY);
500 static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
501 xfrm_address_t *xaddr)
503 switch (((struct sockaddr*)(addr + 1))->sa_family) {
506 ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
508 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
511 &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
512 sizeof(struct in6_addr));
521 static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
524 struct sadb_address *addr;
526 unsigned short family;
527 xfrm_address_t *xaddr;
529 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
533 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
537 /* sadb_address_len should be checked by caller */
538 addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
542 family = ((struct sockaddr *)(addr + 1))->sa_family;
545 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
547 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
549 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
559 return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
562 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
564 pfkey_sockaddr_size(sa_family_t family)
568 return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
569 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
571 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
579 static struct sk_buff * pfkey_xfrm_state2msg(struct xfrm_state *x, int add_keys, int hsc)
582 struct sadb_msg *hdr;
584 struct sadb_lifetime *lifetime;
585 struct sadb_address *addr;
586 struct sadb_key *key;
587 struct sadb_x_sa2 *sa2;
588 struct sockaddr_in *sin;
589 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
590 struct sockaddr_in6 *sin6;
593 int auth_key_size = 0;
594 int encrypt_key_size = 0;
596 struct xfrm_encap_tmpl *natt = NULL;
598 /* address family check */
599 sockaddr_size = pfkey_sockaddr_size(x->props.family);
601 return ERR_PTR(-EINVAL);
603 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
604 key(AE), (identity(SD),) (sensitivity)> */
605 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
606 sizeof(struct sadb_lifetime) +
607 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
608 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
609 sizeof(struct sadb_address)*2 +
611 sizeof(struct sadb_x_sa2);
612 /* identity & sensitivity */
614 if ((x->props.family == AF_INET &&
615 x->sel.saddr.a4 != x->props.saddr.a4)
616 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
617 || (x->props.family == AF_INET6 &&
618 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
621 size += sizeof(struct sadb_address) + sockaddr_size;
624 if (x->aalg && x->aalg->alg_key_len) {
626 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
627 size += sizeof(struct sadb_key) + auth_key_size;
629 if (x->ealg && x->ealg->alg_key_len) {
631 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
632 size += sizeof(struct sadb_key) + encrypt_key_size;
638 if (natt && natt->encap_type) {
639 size += sizeof(struct sadb_x_nat_t_type);
640 size += sizeof(struct sadb_x_nat_t_port);
641 size += sizeof(struct sadb_x_nat_t_port);
644 skb = alloc_skb(size + 16, GFP_ATOMIC);
646 return ERR_PTR(-ENOBUFS);
648 /* call should fill header later */
649 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
650 memset(hdr, 0, size); /* XXX do we need this ? */
651 hdr->sadb_msg_len = size / sizeof(uint64_t);
654 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
655 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
656 sa->sadb_sa_exttype = SADB_EXT_SA;
657 sa->sadb_sa_spi = x->id.spi;
658 sa->sadb_sa_replay = x->props.replay_window;
659 switch (x->km.state) {
660 case XFRM_STATE_VALID:
661 sa->sadb_sa_state = x->km.dying ?
662 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
665 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
668 sa->sadb_sa_state = SADB_SASTATE_DEAD;
671 sa->sadb_sa_auth = 0;
673 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
674 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
676 sa->sadb_sa_encrypt = 0;
677 BUG_ON(x->ealg && x->calg);
679 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
680 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
682 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
684 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
685 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
688 sa->sadb_sa_flags = 0;
689 if (x->props.flags & XFRM_STATE_NOECN)
690 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
691 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
692 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
696 lifetime = (struct sadb_lifetime *) skb_put(skb,
697 sizeof(struct sadb_lifetime));
698 lifetime->sadb_lifetime_len =
699 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
700 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
701 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
702 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
703 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
704 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
708 lifetime = (struct sadb_lifetime *) skb_put(skb,
709 sizeof(struct sadb_lifetime));
710 lifetime->sadb_lifetime_len =
711 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
712 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
713 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
714 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
715 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
716 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
719 lifetime = (struct sadb_lifetime *) skb_put(skb,
720 sizeof(struct sadb_lifetime));
721 lifetime->sadb_lifetime_len =
722 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
723 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
724 lifetime->sadb_lifetime_allocations = x->curlft.packets;
725 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
726 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
727 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
729 addr = (struct sadb_address*) skb_put(skb,
730 sizeof(struct sadb_address)+sockaddr_size);
731 addr->sadb_address_len =
732 (sizeof(struct sadb_address)+sockaddr_size)/
734 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
735 /* "if the ports are non-zero, then the sadb_address_proto field,
736 normally zero, MUST be filled in with the transport
737 protocol's number." - RFC2367 */
738 addr->sadb_address_proto = 0;
739 addr->sadb_address_reserved = 0;
740 if (x->props.family == AF_INET) {
741 addr->sadb_address_prefixlen = 32;
743 sin = (struct sockaddr_in *) (addr + 1);
744 sin->sin_family = AF_INET;
745 sin->sin_addr.s_addr = x->props.saddr.a4;
747 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
749 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
750 else if (x->props.family == AF_INET6) {
751 addr->sadb_address_prefixlen = 128;
753 sin6 = (struct sockaddr_in6 *) (addr + 1);
754 sin6->sin6_family = AF_INET6;
756 sin6->sin6_flowinfo = 0;
757 memcpy(&sin6->sin6_addr, x->props.saddr.a6,
758 sizeof(struct in6_addr));
759 sin6->sin6_scope_id = 0;
766 addr = (struct sadb_address*) skb_put(skb,
767 sizeof(struct sadb_address)+sockaddr_size);
768 addr->sadb_address_len =
769 (sizeof(struct sadb_address)+sockaddr_size)/
771 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
772 addr->sadb_address_proto = 0;
773 addr->sadb_address_prefixlen = 32; /* XXX */
774 addr->sadb_address_reserved = 0;
775 if (x->props.family == AF_INET) {
776 sin = (struct sockaddr_in *) (addr + 1);
777 sin->sin_family = AF_INET;
778 sin->sin_addr.s_addr = x->id.daddr.a4;
780 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
782 if (x->sel.saddr.a4 != x->props.saddr.a4) {
783 addr = (struct sadb_address*) skb_put(skb,
784 sizeof(struct sadb_address)+sockaddr_size);
785 addr->sadb_address_len =
786 (sizeof(struct sadb_address)+sockaddr_size)/
788 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
789 addr->sadb_address_proto =
790 pfkey_proto_from_xfrm(x->sel.proto);
791 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
792 addr->sadb_address_reserved = 0;
794 sin = (struct sockaddr_in *) (addr + 1);
795 sin->sin_family = AF_INET;
796 sin->sin_addr.s_addr = x->sel.saddr.a4;
797 sin->sin_port = x->sel.sport;
798 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
801 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
802 else if (x->props.family == AF_INET6) {
803 addr->sadb_address_prefixlen = 128;
805 sin6 = (struct sockaddr_in6 *) (addr + 1);
806 sin6->sin6_family = AF_INET6;
808 sin6->sin6_flowinfo = 0;
809 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
810 sin6->sin6_scope_id = 0;
812 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
813 sizeof(struct in6_addr))) {
814 addr = (struct sadb_address *) skb_put(skb,
815 sizeof(struct sadb_address)+sockaddr_size);
816 addr->sadb_address_len =
817 (sizeof(struct sadb_address)+sockaddr_size)/
819 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
820 addr->sadb_address_proto =
821 pfkey_proto_from_xfrm(x->sel.proto);
822 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
823 addr->sadb_address_reserved = 0;
825 sin6 = (struct sockaddr_in6 *) (addr + 1);
826 sin6->sin6_family = AF_INET6;
827 sin6->sin6_port = x->sel.sport;
828 sin6->sin6_flowinfo = 0;
829 memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
830 sizeof(struct in6_addr));
831 sin6->sin6_scope_id = 0;
839 if (add_keys && auth_key_size) {
840 key = (struct sadb_key *) skb_put(skb,
841 sizeof(struct sadb_key)+auth_key_size);
842 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
844 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
845 key->sadb_key_bits = x->aalg->alg_key_len;
846 key->sadb_key_reserved = 0;
847 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
850 if (add_keys && encrypt_key_size) {
851 key = (struct sadb_key *) skb_put(skb,
852 sizeof(struct sadb_key)+encrypt_key_size);
853 key->sadb_key_len = (sizeof(struct sadb_key) +
854 encrypt_key_size) / sizeof(uint64_t);
855 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
856 key->sadb_key_bits = x->ealg->alg_key_len;
857 key->sadb_key_reserved = 0;
858 memcpy(key + 1, x->ealg->alg_key,
859 (x->ealg->alg_key_len+7)/8);
863 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
864 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
865 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
866 sa2->sadb_x_sa2_mode = x->props.mode + 1;
867 sa2->sadb_x_sa2_reserved1 = 0;
868 sa2->sadb_x_sa2_reserved2 = 0;
869 sa2->sadb_x_sa2_sequence = 0;
870 sa2->sadb_x_sa2_reqid = x->props.reqid;
872 if (natt && natt->encap_type) {
873 struct sadb_x_nat_t_type *n_type;
874 struct sadb_x_nat_t_port *n_port;
877 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
878 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
879 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
880 n_type->sadb_x_nat_t_type_type = natt->encap_type;
881 n_type->sadb_x_nat_t_type_reserved[0] = 0;
882 n_type->sadb_x_nat_t_type_reserved[1] = 0;
883 n_type->sadb_x_nat_t_type_reserved[2] = 0;
886 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
887 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
888 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
889 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
890 n_port->sadb_x_nat_t_port_reserved = 0;
893 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
894 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
895 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
896 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
897 n_port->sadb_x_nat_t_port_reserved = 0;
903 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
906 struct xfrm_state *x;
907 struct sadb_lifetime *lifetime;
909 struct sadb_key *key;
914 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
916 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
917 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
918 return ERR_PTR(-EINVAL);
919 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
920 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
921 return ERR_PTR(-EINVAL);
922 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
923 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
924 return ERR_PTR(-EINVAL);
925 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
926 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
927 return ERR_PTR(-EINVAL);
929 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
931 return ERR_PTR(-EINVAL);
933 /* default error is no buffer space */
938 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
939 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
940 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
941 Therefore, the sadb_sa_state field of all submitted SAs MUST be
942 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
945 However, KAME setkey always uses SADB_SASTATE_LARVAL.
946 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
948 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
949 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
950 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
951 sa->sadb_sa_encrypt > SADB_EALG_MAX)
952 return ERR_PTR(-EINVAL);
953 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
955 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
956 ((key->sadb_key_bits+7) / 8 == 0 ||
957 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
958 return ERR_PTR(-EINVAL);
959 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
961 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
962 ((key->sadb_key_bits+7) / 8 == 0 ||
963 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
964 return ERR_PTR(-EINVAL);
966 x = xfrm_state_alloc();
968 return ERR_PTR(-ENOBUFS);
971 x->id.spi = sa->sadb_sa_spi;
972 x->props.replay_window = sa->sadb_sa_replay;
973 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
974 x->props.flags |= XFRM_STATE_NOECN;
975 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
976 x->props.flags |= XFRM_STATE_DECAP_DSCP;
978 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
979 if (lifetime != NULL) {
980 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
981 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
982 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
983 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
985 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
986 if (lifetime != NULL) {
987 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
988 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
989 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
990 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
992 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
993 if (sa->sadb_sa_auth) {
995 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1001 keysize = (key->sadb_key_bits + 7) / 8;
1002 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1005 strcpy(x->aalg->alg_name, a->name);
1006 x->aalg->alg_key_len = 0;
1008 x->aalg->alg_key_len = key->sadb_key_bits;
1009 memcpy(x->aalg->alg_key, key+1, keysize);
1011 x->props.aalgo = sa->sadb_sa_auth;
1012 /* x->algo.flags = sa->sadb_sa_flags; */
1014 if (sa->sadb_sa_encrypt) {
1015 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1016 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1021 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1024 strcpy(x->calg->alg_name, a->name);
1025 x->props.calgo = sa->sadb_sa_encrypt;
1028 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1033 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1035 keysize = (key->sadb_key_bits + 7) / 8;
1036 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1039 strcpy(x->ealg->alg_name, a->name);
1040 x->ealg->alg_key_len = 0;
1042 x->ealg->alg_key_len = key->sadb_key_bits;
1043 memcpy(x->ealg->alg_key, key+1, keysize);
1045 x->props.ealgo = sa->sadb_sa_encrypt;
1048 /* x->algo.flags = sa->sadb_sa_flags; */
1050 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1052 if (!x->props.family) {
1053 err = -EAFNOSUPPORT;
1056 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1059 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1060 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1061 x->props.mode = sa2->sadb_x_sa2_mode;
1064 x->props.reqid = sa2->sadb_x_sa2_reqid;
1067 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1068 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1070 /* Nobody uses this, but we try. */
1071 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1072 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1075 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1076 struct sadb_x_nat_t_type* n_type;
1077 struct xfrm_encap_tmpl *natt;
1079 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1084 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1085 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1087 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1088 struct sadb_x_nat_t_port* n_port =
1089 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1090 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1092 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1093 struct sadb_x_nat_t_port* n_port =
1094 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1095 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1099 x->type = xfrm_get_type(proto, x->props.family);
1100 if (x->type == NULL) {
1104 if (x->type->init_state(x, NULL)) {
1108 x->km.seq = hdr->sadb_msg_seq;
1109 x->km.state = XFRM_STATE_VALID;
1113 x->km.state = XFRM_STATE_DEAD;
1115 return ERR_PTR(err);
1118 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1123 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1125 struct sk_buff *resp_skb;
1126 struct sadb_x_sa2 *sa2;
1127 struct sadb_address *saddr, *daddr;
1128 struct sadb_msg *out_hdr;
1129 struct xfrm_state *x = NULL;
1133 unsigned short family;
1134 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1136 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1137 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1140 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1144 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1145 mode = sa2->sadb_x_sa2_mode - 1;
1146 reqid = sa2->sadb_x_sa2_reqid;
1152 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1153 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1155 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1158 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1159 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1161 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1163 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1164 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1169 if (hdr->sadb_msg_seq) {
1170 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1171 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1178 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1183 resp_skb = ERR_PTR(-ENOENT);
1185 spin_lock_bh(&x->lock);
1186 if (x->km.state != XFRM_STATE_DEAD) {
1187 struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1188 u32 min_spi, max_spi;
1190 if (range != NULL) {
1191 min_spi = range->sadb_spirange_min;
1192 max_spi = range->sadb_spirange_max;
1195 max_spi = 0x0fffffff;
1197 xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi));
1199 resp_skb = pfkey_xfrm_state2msg(x, 0, 3);
1201 spin_unlock_bh(&x->lock);
1203 if (IS_ERR(resp_skb)) {
1205 return PTR_ERR(resp_skb);
1208 out_hdr = (struct sadb_msg *) resp_skb->data;
1209 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1210 out_hdr->sadb_msg_type = SADB_GETSPI;
1211 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1212 out_hdr->sadb_msg_errno = 0;
1213 out_hdr->sadb_msg_reserved = 0;
1214 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1215 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1219 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1224 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1226 struct xfrm_state *x;
1228 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1231 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1234 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1238 spin_lock_bh(&x->lock);
1239 if (x->km.state == XFRM_STATE_ACQ) {
1240 x->km.state = XFRM_STATE_ERROR;
1243 spin_unlock_bh(&x->lock);
1248 static inline int event2poltype(int event)
1251 case XFRM_SAP_DELETED:
1252 return SADB_X_SPDDELETE;
1253 case XFRM_SAP_ADDED:
1254 return SADB_X_SPDADD;
1255 case XFRM_SAP_UPDATED:
1256 return SADB_X_SPDUPDATE;
1257 case XFRM_SAP_EXPIRED:
1258 // return SADB_X_SPDEXPIRE;
1260 printk("pfkey: Unknown policy event %d\n", event);
1267 static inline int event2keytype(int event)
1270 case XFRM_SAP_DELETED:
1272 case XFRM_SAP_ADDED:
1274 case XFRM_SAP_UPDATED:
1276 case XFRM_SAP_EXPIRED:
1279 printk("pfkey: Unknown SA event %d\n", event);
1287 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1289 struct sk_buff *skb;
1290 struct sadb_msg *hdr;
1293 if (c->event == XFRM_SAP_DELETED)
1296 if (c->event == XFRM_SAP_EXPIRED) {
1303 skb = pfkey_xfrm_state2msg(x, 0, hsc);
1306 return PTR_ERR(skb);
1308 hdr = (struct sadb_msg *) skb->data;
1309 hdr->sadb_msg_version = PF_KEY_V2;
1310 hdr->sadb_msg_type = event2keytype(c->event);
1311 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1312 hdr->sadb_msg_errno = 0;
1313 hdr->sadb_msg_reserved = 0;
1314 hdr->sadb_msg_seq = c->seq;
1315 hdr->sadb_msg_pid = c->pid;
1317 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1322 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1324 struct xfrm_state *x;
1330 x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1335 if (hdr->sadb_msg_type == SADB_ADD)
1336 err = xfrm_state_add(x);
1338 err = xfrm_state_update(x);
1341 x->km.state = XFRM_STATE_DEAD;
1346 if (hdr->sadb_msg_type == SADB_ADD)
1347 c.event = XFRM_SAP_ADDED;
1349 c.event = XFRM_SAP_UPDATED;
1350 c.seq = hdr->sadb_msg_seq;
1351 c.pid = hdr->sadb_msg_pid;
1352 km_state_notify(x, &c);
1358 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1360 struct xfrm_state *x;
1364 if (!ext_hdrs[SADB_EXT_SA-1] ||
1365 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1366 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1369 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1373 if (xfrm_state_kern(x)) {
1378 err = xfrm_state_delete(x);
1384 c.seq = hdr->sadb_msg_seq;
1385 c.pid = hdr->sadb_msg_pid;
1386 c.event = XFRM_SAP_DELETED;
1387 km_state_notify(x, &c);
1393 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1396 struct sk_buff *out_skb;
1397 struct sadb_msg *out_hdr;
1398 struct xfrm_state *x;
1400 if (!ext_hdrs[SADB_EXT_SA-1] ||
1401 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1402 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1405 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1409 out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1410 proto = x->id.proto;
1412 if (IS_ERR(out_skb))
1413 return PTR_ERR(out_skb);
1415 out_hdr = (struct sadb_msg *) out_skb->data;
1416 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1417 out_hdr->sadb_msg_type = SADB_DUMP;
1418 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1419 out_hdr->sadb_msg_errno = 0;
1420 out_hdr->sadb_msg_reserved = 0;
1421 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1422 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1423 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1428 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig, int allocation)
1430 struct sk_buff *skb;
1431 struct sadb_msg *hdr;
1432 int len, auth_len, enc_len, i;
1434 auth_len = xfrm_count_auth_supported();
1436 auth_len *= sizeof(struct sadb_alg);
1437 auth_len += sizeof(struct sadb_supported);
1440 enc_len = xfrm_count_enc_supported();
1442 enc_len *= sizeof(struct sadb_alg);
1443 enc_len += sizeof(struct sadb_supported);
1446 len = enc_len + auth_len + sizeof(struct sadb_msg);
1448 skb = alloc_skb(len + 16, allocation);
1452 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1453 pfkey_hdr_dup(hdr, orig);
1454 hdr->sadb_msg_errno = 0;
1455 hdr->sadb_msg_len = len / sizeof(uint64_t);
1458 struct sadb_supported *sp;
1459 struct sadb_alg *ap;
1461 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1462 ap = (struct sadb_alg *) (sp + 1);
1464 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1465 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1467 for (i = 0; ; i++) {
1468 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1471 if (aalg->available)
1477 struct sadb_supported *sp;
1478 struct sadb_alg *ap;
1480 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1481 ap = (struct sadb_alg *) (sp + 1);
1483 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1484 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1486 for (i = 0; ; i++) {
1487 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1490 if (ealg->available)
1499 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1501 struct pfkey_sock *pfk = pfkey_sk(sk);
1502 struct sk_buff *supp_skb;
1504 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1507 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1508 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1510 pfk->registered |= (1<<hdr->sadb_msg_satype);
1515 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1517 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1518 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1523 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1528 static int key_notify_sa_flush(struct km_event *c)
1530 struct sk_buff *skb;
1531 struct sadb_msg *hdr;
1533 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1536 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1537 hdr->sadb_msg_satype = pfkey_proto2satype(c->data);
1538 hdr->sadb_msg_seq = c->seq;
1539 hdr->sadb_msg_pid = c->pid;
1540 hdr->sadb_msg_version = PF_KEY_V2;
1541 hdr->sadb_msg_errno = (uint8_t) 0;
1542 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1544 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1549 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1554 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1558 xfrm_state_flush(proto);
1560 c.seq = hdr->sadb_msg_seq;
1561 c.pid = hdr->sadb_msg_pid;
1562 c.event = XFRM_SAP_FLUSHED;
1563 km_state_notify(NULL, &c);
1568 struct pfkey_dump_data
1570 struct sk_buff *skb;
1571 struct sadb_msg *hdr;
1575 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1577 struct pfkey_dump_data *data = ptr;
1578 struct sk_buff *out_skb;
1579 struct sadb_msg *out_hdr;
1581 out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1582 if (IS_ERR(out_skb))
1583 return PTR_ERR(out_skb);
1585 out_hdr = (struct sadb_msg *) out_skb->data;
1586 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1587 out_hdr->sadb_msg_type = SADB_DUMP;
1588 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1589 out_hdr->sadb_msg_errno = 0;
1590 out_hdr->sadb_msg_reserved = 0;
1591 out_hdr->sadb_msg_seq = count;
1592 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1593 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1597 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1600 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1602 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1606 return xfrm_state_walk(proto, dump_sa, &data);
1609 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1611 struct pfkey_sock *pfk = pfkey_sk(sk);
1612 int satype = hdr->sadb_msg_satype;
1614 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1615 /* XXX we mangle packet... */
1616 hdr->sadb_msg_errno = 0;
1617 if (satype != 0 && satype != 1)
1619 pfk->promisc = satype;
1621 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1625 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1628 u32 reqid = *(u32*)ptr;
1630 for (i=0; i<xp->xfrm_nr; i++) {
1631 if (xp->xfrm_vec[i].reqid == reqid)
1637 static u32 gen_reqid(void)
1640 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1646 reqid = IPSEC_MANUAL_REQID_MAX+1;
1647 if (xfrm_policy_walk(check_reqid, (void*)&reqid) != -EEXIST)
1649 } while (reqid != start);
1654 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1656 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1657 struct sockaddr_in *sin;
1658 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1659 struct sockaddr_in6 *sin6;
1662 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1665 if (rq->sadb_x_ipsecrequest_mode == 0)
1668 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1669 t->mode = rq->sadb_x_ipsecrequest_mode-1;
1670 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1672 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1673 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1674 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1676 if (!t->reqid && !(t->reqid = gen_reqid()))
1680 /* addresses present only in tunnel mode */
1682 switch (xp->family) {
1684 sin = (void*)(rq+1);
1685 if (sin->sin_family != AF_INET)
1687 t->saddr.a4 = sin->sin_addr.s_addr;
1689 if (sin->sin_family != AF_INET)
1691 t->id.daddr.a4 = sin->sin_addr.s_addr;
1693 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1695 sin6 = (void *)(rq+1);
1696 if (sin6->sin6_family != AF_INET6)
1698 memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1700 if (sin6->sin6_family != AF_INET6)
1702 memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1709 /* No way to set this via kame pfkey */
1710 t->aalgos = t->ealgos = t->calgos = ~0;
1716 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1719 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1720 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1722 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1723 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1725 len -= rq->sadb_x_ipsecrequest_len;
1726 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1731 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1733 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1734 int socklen = (xp->family == AF_INET ?
1735 sizeof(struct sockaddr_in) :
1736 sizeof(struct sockaddr_in6));
1738 return sizeof(struct sadb_msg) +
1739 (sizeof(struct sadb_lifetime) * 3) +
1740 (sizeof(struct sadb_address) * 2) +
1741 (sockaddr_size * 2) +
1742 sizeof(struct sadb_x_policy) +
1743 (xp->xfrm_nr * (sizeof(struct sadb_x_ipsecrequest) +
1747 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1749 struct sk_buff *skb;
1752 size = pfkey_xfrm_policy2msg_size(xp);
1754 skb = alloc_skb(size + 16, GFP_ATOMIC);
1756 return ERR_PTR(-ENOBUFS);
1761 static void pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1763 struct sadb_msg *hdr;
1764 struct sadb_address *addr;
1765 struct sadb_lifetime *lifetime;
1766 struct sadb_x_policy *pol;
1767 struct sockaddr_in *sin;
1768 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1769 struct sockaddr_in6 *sin6;
1773 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1774 int socklen = (xp->family == AF_INET ?
1775 sizeof(struct sockaddr_in) :
1776 sizeof(struct sockaddr_in6));
1778 size = pfkey_xfrm_policy2msg_size(xp);
1780 /* call should fill header later */
1781 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1782 memset(hdr, 0, size); /* XXX do we need this ? */
1785 addr = (struct sadb_address*) skb_put(skb,
1786 sizeof(struct sadb_address)+sockaddr_size);
1787 addr->sadb_address_len =
1788 (sizeof(struct sadb_address)+sockaddr_size)/
1790 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1791 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1792 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1793 addr->sadb_address_reserved = 0;
1795 if (xp->family == AF_INET) {
1796 sin = (struct sockaddr_in *) (addr + 1);
1797 sin->sin_family = AF_INET;
1798 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1799 sin->sin_port = xp->selector.sport;
1800 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1802 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1803 else if (xp->family == AF_INET6) {
1804 sin6 = (struct sockaddr_in6 *) (addr + 1);
1805 sin6->sin6_family = AF_INET6;
1806 sin6->sin6_port = xp->selector.sport;
1807 sin6->sin6_flowinfo = 0;
1808 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1809 sizeof(struct in6_addr));
1810 sin6->sin6_scope_id = 0;
1817 addr = (struct sadb_address*) skb_put(skb,
1818 sizeof(struct sadb_address)+sockaddr_size);
1819 addr->sadb_address_len =
1820 (sizeof(struct sadb_address)+sockaddr_size)/
1822 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1823 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1824 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1825 addr->sadb_address_reserved = 0;
1826 if (xp->family == AF_INET) {
1827 sin = (struct sockaddr_in *) (addr + 1);
1828 sin->sin_family = AF_INET;
1829 sin->sin_addr.s_addr = xp->selector.daddr.a4;
1830 sin->sin_port = xp->selector.dport;
1831 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1833 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1834 else if (xp->family == AF_INET6) {
1835 sin6 = (struct sockaddr_in6 *) (addr + 1);
1836 sin6->sin6_family = AF_INET6;
1837 sin6->sin6_port = xp->selector.dport;
1838 sin6->sin6_flowinfo = 0;
1839 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
1840 sizeof(struct in6_addr));
1841 sin6->sin6_scope_id = 0;
1848 lifetime = (struct sadb_lifetime *) skb_put(skb,
1849 sizeof(struct sadb_lifetime));
1850 lifetime->sadb_lifetime_len =
1851 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
1852 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
1853 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
1854 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
1855 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
1856 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
1858 lifetime = (struct sadb_lifetime *) skb_put(skb,
1859 sizeof(struct sadb_lifetime));
1860 lifetime->sadb_lifetime_len =
1861 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
1862 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
1863 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
1864 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
1865 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
1866 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
1868 lifetime = (struct sadb_lifetime *) skb_put(skb,
1869 sizeof(struct sadb_lifetime));
1870 lifetime->sadb_lifetime_len =
1871 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
1872 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
1873 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
1874 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
1875 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
1876 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
1878 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
1879 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
1880 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
1881 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
1882 if (xp->action == XFRM_POLICY_ALLOW) {
1884 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
1886 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
1888 pol->sadb_x_policy_dir = dir+1;
1889 pol->sadb_x_policy_id = xp->index;
1890 pol->sadb_x_policy_priority = xp->priority;
1892 for (i=0; i<xp->xfrm_nr; i++) {
1893 struct sadb_x_ipsecrequest *rq;
1894 struct xfrm_tmpl *t = xp->xfrm_vec + i;
1897 req_size = sizeof(struct sadb_x_ipsecrequest);
1899 req_size += 2*socklen;
1902 rq = (void*)skb_put(skb, req_size);
1903 pol->sadb_x_policy_len += req_size/8;
1904 memset(rq, 0, sizeof(*rq));
1905 rq->sadb_x_ipsecrequest_len = req_size;
1906 rq->sadb_x_ipsecrequest_proto = t->id.proto;
1907 rq->sadb_x_ipsecrequest_mode = t->mode+1;
1908 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
1910 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
1912 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
1913 rq->sadb_x_ipsecrequest_reqid = t->reqid;
1915 switch (xp->family) {
1917 sin = (void*)(rq+1);
1918 sin->sin_family = AF_INET;
1919 sin->sin_addr.s_addr = t->saddr.a4;
1921 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1923 sin->sin_family = AF_INET;
1924 sin->sin_addr.s_addr = t->id.daddr.a4;
1926 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1928 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1930 sin6 = (void*)(rq+1);
1931 sin6->sin6_family = AF_INET6;
1932 sin6->sin6_port = 0;
1933 sin6->sin6_flowinfo = 0;
1934 memcpy(&sin6->sin6_addr, t->saddr.a6,
1935 sizeof(struct in6_addr));
1936 sin6->sin6_scope_id = 0;
1939 sin6->sin6_family = AF_INET6;
1940 sin6->sin6_port = 0;
1941 sin6->sin6_flowinfo = 0;
1942 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
1943 sizeof(struct in6_addr));
1944 sin6->sin6_scope_id = 0;
1952 hdr->sadb_msg_len = size / sizeof(uint64_t);
1953 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
1956 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
1958 struct sk_buff *out_skb;
1959 struct sadb_msg *out_hdr;
1962 out_skb = pfkey_xfrm_policy2msg_prep(xp);
1963 if (IS_ERR(out_skb)) {
1964 err = PTR_ERR(out_skb);
1967 pfkey_xfrm_policy2msg(out_skb, xp, dir);
1969 out_hdr = (struct sadb_msg *) out_skb->data;
1970 out_hdr->sadb_msg_version = PF_KEY_V2;
1972 if (c->data && c->event == XFRM_SAP_DELETED)
1973 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
1975 out_hdr->sadb_msg_type = event2poltype(c->event);
1976 out_hdr->sadb_msg_errno = 0;
1977 out_hdr->sadb_msg_seq = c->seq;
1978 out_hdr->sadb_msg_pid = c->pid;
1979 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1985 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1988 struct sadb_lifetime *lifetime;
1989 struct sadb_address *sa;
1990 struct sadb_x_policy *pol;
1991 struct xfrm_policy *xp;
1994 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1995 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
1996 !ext_hdrs[SADB_X_EXT_POLICY-1])
1999 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2000 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2002 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2005 xp = xfrm_policy_alloc(GFP_KERNEL);
2009 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2010 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2011 xp->priority = pol->sadb_x_policy_priority;
2013 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2014 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2019 xp->selector.family = xp->family;
2020 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2021 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2022 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2023 if (xp->selector.sport)
2024 xp->selector.sport_mask = ~0;
2026 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2027 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2028 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2030 /* Amusing, we set this twice. KAME apps appear to set same value
2031 * in both addresses.
2033 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2035 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2036 if (xp->selector.dport)
2037 xp->selector.dport_mask = ~0;
2039 xp->lft.soft_byte_limit = XFRM_INF;
2040 xp->lft.hard_byte_limit = XFRM_INF;
2041 xp->lft.soft_packet_limit = XFRM_INF;
2042 xp->lft.hard_packet_limit = XFRM_INF;
2043 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2044 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2045 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2046 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2047 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2049 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2050 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2051 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2052 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2053 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2056 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2057 (err = parse_ipsecrequests(xp, pol)) < 0)
2060 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2061 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2067 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2068 c.event = XFRM_SAP_UPDATED;
2070 c.event = XFRM_SAP_ADDED;
2072 c.seq = hdr->sadb_msg_seq;
2073 c.pid = hdr->sadb_msg_pid;
2075 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2084 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2087 struct sadb_address *sa;
2088 struct sadb_x_policy *pol;
2089 struct xfrm_policy *xp;
2090 struct xfrm_selector sel;
2093 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2094 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2095 !ext_hdrs[SADB_X_EXT_POLICY-1])
2098 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2099 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2102 memset(&sel, 0, sizeof(sel));
2104 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2105 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2106 sel.prefixlen_s = sa->sadb_address_prefixlen;
2107 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2108 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2110 sel.sport_mask = ~0;
2112 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2113 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2114 sel.prefixlen_d = sa->sadb_address_prefixlen;
2115 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2116 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2118 sel.dport_mask = ~0;
2120 xp = xfrm_policy_bysel(pol->sadb_x_policy_dir-1, &sel, 1);
2126 c.seq = hdr->sadb_msg_seq;
2127 c.pid = hdr->sadb_msg_pid;
2128 c.event = XFRM_SAP_DELETED;
2129 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2135 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2138 struct sk_buff *out_skb;
2139 struct sadb_msg *out_hdr;
2142 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2143 if (IS_ERR(out_skb)) {
2144 err = PTR_ERR(out_skb);
2147 pfkey_xfrm_policy2msg(out_skb, xp, dir);
2149 out_hdr = (struct sadb_msg *) out_skb->data;
2150 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2151 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2152 out_hdr->sadb_msg_satype = 0;
2153 out_hdr->sadb_msg_errno = 0;
2154 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2155 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2156 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2163 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2166 struct sadb_x_policy *pol;
2167 struct xfrm_policy *xp;
2170 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2173 xp = xfrm_policy_byid(0, pol->sadb_x_policy_id,
2174 hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2180 c.seq = hdr->sadb_msg_seq;
2181 c.pid = hdr->sadb_msg_pid;
2182 if (hdr->sadb_msg_type == SADB_X_SPDDELETE2) {
2183 c.data = 1; // to signal pfkey of SADB_X_SPDDELETE2
2184 c.event = XFRM_SAP_DELETED;
2185 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2187 err = key_pol_get_resp(sk, xp, hdr, pol->sadb_x_policy_dir-1);
2194 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2196 struct pfkey_dump_data *data = ptr;
2197 struct sk_buff *out_skb;
2198 struct sadb_msg *out_hdr;
2200 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2201 if (IS_ERR(out_skb))
2202 return PTR_ERR(out_skb);
2204 pfkey_xfrm_policy2msg(out_skb, xp, dir);
2206 out_hdr = (struct sadb_msg *) out_skb->data;
2207 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2208 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2209 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2210 out_hdr->sadb_msg_errno = 0;
2211 out_hdr->sadb_msg_seq = count;
2212 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2213 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2217 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2219 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2221 return xfrm_policy_walk(dump_sp, &data);
2224 static int key_notify_policy_flush(struct km_event *c)
2226 struct sk_buff *skb_out;
2227 struct sadb_msg *hdr;
2229 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2232 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2233 hdr->sadb_msg_seq = c->seq;
2234 hdr->sadb_msg_pid = c->pid;
2235 hdr->sadb_msg_version = PF_KEY_V2;
2236 hdr->sadb_msg_errno = (uint8_t) 0;
2237 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2238 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2243 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2247 xfrm_policy_flush();
2248 c.event = XFRM_SAP_FLUSHED;
2249 c.pid = hdr->sadb_msg_pid;
2250 c.seq = hdr->sadb_msg_seq;
2251 km_policy_notify(NULL, 0, &c);
2256 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2257 struct sadb_msg *hdr, void **ext_hdrs);
2258 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2259 [SADB_RESERVED] = pfkey_reserved,
2260 [SADB_GETSPI] = pfkey_getspi,
2261 [SADB_UPDATE] = pfkey_add,
2262 [SADB_ADD] = pfkey_add,
2263 [SADB_DELETE] = pfkey_delete,
2264 [SADB_GET] = pfkey_get,
2265 [SADB_ACQUIRE] = pfkey_acquire,
2266 [SADB_REGISTER] = pfkey_register,
2267 [SADB_EXPIRE] = NULL,
2268 [SADB_FLUSH] = pfkey_flush,
2269 [SADB_DUMP] = pfkey_dump,
2270 [SADB_X_PROMISC] = pfkey_promisc,
2271 [SADB_X_PCHANGE] = NULL,
2272 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2273 [SADB_X_SPDADD] = pfkey_spdadd,
2274 [SADB_X_SPDDELETE] = pfkey_spddelete,
2275 [SADB_X_SPDGET] = pfkey_spdget,
2276 [SADB_X_SPDACQUIRE] = NULL,
2277 [SADB_X_SPDDUMP] = pfkey_spddump,
2278 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2279 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2280 [SADB_X_SPDDELETE2] = pfkey_spdget,
2283 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2285 void *ext_hdrs[SADB_EXT_MAX];
2288 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2289 BROADCAST_PROMISC_ONLY, NULL);
2291 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2292 err = parse_exthdrs(skb, hdr, ext_hdrs);
2295 if (pfkey_funcs[hdr->sadb_msg_type])
2296 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2301 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2303 struct sadb_msg *hdr = NULL;
2305 if (skb->len < sizeof(*hdr)) {
2308 hdr = (struct sadb_msg *) skb->data;
2309 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2310 hdr->sadb_msg_reserved != 0 ||
2311 (hdr->sadb_msg_type <= SADB_RESERVED ||
2312 hdr->sadb_msg_type > SADB_MAX)) {
2315 } else if (hdr->sadb_msg_len != (skb->len /
2316 sizeof(uint64_t)) ||
2317 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2318 sizeof(uint64_t))) {
2328 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2330 return t->aalgos & (1 << d->desc.sadb_alg_id);
2333 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2335 return t->ealgos & (1 << d->desc.sadb_alg_id);
2338 static int count_ah_combs(struct xfrm_tmpl *t)
2342 for (i = 0; ; i++) {
2343 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2346 if (aalg_tmpl_set(t, aalg) && aalg->available)
2347 sz += sizeof(struct sadb_comb);
2349 return sz + sizeof(struct sadb_prop);
2352 static int count_esp_combs(struct xfrm_tmpl *t)
2356 for (i = 0; ; i++) {
2357 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2361 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2364 for (k = 1; ; k++) {
2365 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2369 if (aalg_tmpl_set(t, aalg) && aalg->available)
2370 sz += sizeof(struct sadb_comb);
2373 return sz + sizeof(struct sadb_prop);
2376 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2378 struct sadb_prop *p;
2381 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2382 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2383 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2384 p->sadb_prop_replay = 32;
2385 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2387 for (i = 0; ; i++) {
2388 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2392 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2393 struct sadb_comb *c;
2394 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2395 memset(c, 0, sizeof(*c));
2396 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2397 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2398 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2399 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2400 c->sadb_comb_hard_addtime = 24*60*60;
2401 c->sadb_comb_soft_addtime = 20*60*60;
2402 c->sadb_comb_hard_usetime = 8*60*60;
2403 c->sadb_comb_soft_usetime = 7*60*60;
2408 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2410 struct sadb_prop *p;
2413 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2414 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2415 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2416 p->sadb_prop_replay = 32;
2417 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2420 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2424 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2427 for (k = 1; ; k++) {
2428 struct sadb_comb *c;
2429 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2432 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2434 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2435 memset(c, 0, sizeof(*c));
2436 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2437 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2438 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2439 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2440 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2441 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2442 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2443 c->sadb_comb_hard_addtime = 24*60*60;
2444 c->sadb_comb_soft_addtime = 20*60*60;
2445 c->sadb_comb_hard_usetime = 8*60*60;
2446 c->sadb_comb_soft_usetime = 7*60*60;
2451 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2456 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2458 struct sk_buff *out_skb;
2459 struct sadb_msg *out_hdr;
2469 out_skb = pfkey_xfrm_state2msg(x, 0, hsc);
2470 if (IS_ERR(out_skb))
2471 return PTR_ERR(out_skb);
2473 out_hdr = (struct sadb_msg *) out_skb->data;
2474 out_hdr->sadb_msg_version = PF_KEY_V2;
2475 out_hdr->sadb_msg_type = SADB_EXPIRE;
2476 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2477 out_hdr->sadb_msg_errno = 0;
2478 out_hdr->sadb_msg_reserved = 0;
2479 out_hdr->sadb_msg_seq = 0;
2480 out_hdr->sadb_msg_pid = 0;
2482 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2486 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2489 case XFRM_SAP_EXPIRED:
2490 return key_notify_sa_expire(x, c);
2491 case XFRM_SAP_DELETED:
2492 case XFRM_SAP_ADDED:
2493 case XFRM_SAP_UPDATED:
2494 return key_notify_sa(x, c);
2495 case XFRM_SAP_FLUSHED:
2496 return key_notify_sa_flush(c);
2498 printk("pfkey: Unknown SA event %d\n", c->event);
2505 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2508 case XFRM_SAP_EXPIRED:
2509 return key_notify_policy_expire(xp, c);
2510 case XFRM_SAP_DELETED:
2511 case XFRM_SAP_ADDED:
2512 case XFRM_SAP_UPDATED:
2513 return key_notify_policy(xp, dir, c);
2514 case XFRM_SAP_FLUSHED:
2515 return key_notify_policy_flush(c);
2517 printk("pfkey: Unknown policy event %d\n", c->event);
2524 static u32 get_acqseq(void)
2528 static DEFINE_SPINLOCK(acqseq_lock);
2530 spin_lock_bh(&acqseq_lock);
2531 res = (++acqseq ? : ++acqseq);
2532 spin_unlock_bh(&acqseq_lock);
2536 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
2538 struct sk_buff *skb;
2539 struct sadb_msg *hdr;
2540 struct sadb_address *addr;
2541 struct sadb_x_policy *pol;
2542 struct sockaddr_in *sin;
2543 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2544 struct sockaddr_in6 *sin6;
2549 sockaddr_size = pfkey_sockaddr_size(x->props.family);
2553 size = sizeof(struct sadb_msg) +
2554 (sizeof(struct sadb_address) * 2) +
2555 (sockaddr_size * 2) +
2556 sizeof(struct sadb_x_policy);
2558 if (x->id.proto == IPPROTO_AH)
2559 size += count_ah_combs(t);
2560 else if (x->id.proto == IPPROTO_ESP)
2561 size += count_esp_combs(t);
2563 skb = alloc_skb(size + 16, GFP_ATOMIC);
2567 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2568 hdr->sadb_msg_version = PF_KEY_V2;
2569 hdr->sadb_msg_type = SADB_ACQUIRE;
2570 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2571 hdr->sadb_msg_len = size / sizeof(uint64_t);
2572 hdr->sadb_msg_errno = 0;
2573 hdr->sadb_msg_reserved = 0;
2574 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
2575 hdr->sadb_msg_pid = 0;
2578 addr = (struct sadb_address*) skb_put(skb,
2579 sizeof(struct sadb_address)+sockaddr_size);
2580 addr->sadb_address_len =
2581 (sizeof(struct sadb_address)+sockaddr_size)/
2583 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2584 addr->sadb_address_proto = 0;
2585 addr->sadb_address_reserved = 0;
2586 if (x->props.family == AF_INET) {
2587 addr->sadb_address_prefixlen = 32;
2589 sin = (struct sockaddr_in *) (addr + 1);
2590 sin->sin_family = AF_INET;
2591 sin->sin_addr.s_addr = x->props.saddr.a4;
2593 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2595 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2596 else if (x->props.family == AF_INET6) {
2597 addr->sadb_address_prefixlen = 128;
2599 sin6 = (struct sockaddr_in6 *) (addr + 1);
2600 sin6->sin6_family = AF_INET6;
2601 sin6->sin6_port = 0;
2602 sin6->sin6_flowinfo = 0;
2603 memcpy(&sin6->sin6_addr,
2604 x->props.saddr.a6, sizeof(struct in6_addr));
2605 sin6->sin6_scope_id = 0;
2612 addr = (struct sadb_address*) skb_put(skb,
2613 sizeof(struct sadb_address)+sockaddr_size);
2614 addr->sadb_address_len =
2615 (sizeof(struct sadb_address)+sockaddr_size)/
2617 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2618 addr->sadb_address_proto = 0;
2619 addr->sadb_address_reserved = 0;
2620 if (x->props.family == AF_INET) {
2621 addr->sadb_address_prefixlen = 32;
2623 sin = (struct sockaddr_in *) (addr + 1);
2624 sin->sin_family = AF_INET;
2625 sin->sin_addr.s_addr = x->id.daddr.a4;
2627 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2629 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2630 else if (x->props.family == AF_INET6) {
2631 addr->sadb_address_prefixlen = 128;
2633 sin6 = (struct sockaddr_in6 *) (addr + 1);
2634 sin6->sin6_family = AF_INET6;
2635 sin6->sin6_port = 0;
2636 sin6->sin6_flowinfo = 0;
2637 memcpy(&sin6->sin6_addr,
2638 x->id.daddr.a6, sizeof(struct in6_addr));
2639 sin6->sin6_scope_id = 0;
2645 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2646 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2647 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2648 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2649 pol->sadb_x_policy_dir = dir+1;
2650 pol->sadb_x_policy_id = xp->index;
2652 /* Set sadb_comb's. */
2653 if (x->id.proto == IPPROTO_AH)
2654 dump_ah_combs(skb, t);
2655 else if (x->id.proto == IPPROTO_ESP)
2656 dump_esp_combs(skb, t);
2658 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2661 static struct xfrm_policy *pfkey_compile_policy(u16 family, int opt,
2662 u8 *data, int len, int *dir)
2664 struct xfrm_policy *xp;
2665 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
2669 if (opt != IP_IPSEC_POLICY) {
2674 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2676 if (opt != IPV6_IPSEC_POLICY) {
2689 if (len < sizeof(struct sadb_x_policy) ||
2690 pol->sadb_x_policy_len*8 > len ||
2691 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
2692 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
2695 xp = xfrm_policy_alloc(GFP_ATOMIC);
2701 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2702 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2704 xp->lft.soft_byte_limit = XFRM_INF;
2705 xp->lft.hard_byte_limit = XFRM_INF;
2706 xp->lft.soft_packet_limit = XFRM_INF;
2707 xp->lft.hard_packet_limit = XFRM_INF;
2708 xp->family = family;
2711 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2712 (*dir = parse_ipsecrequests(xp, pol)) < 0)
2715 *dir = pol->sadb_x_policy_dir-1;
2723 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport)
2725 struct sk_buff *skb;
2726 struct sadb_msg *hdr;
2728 struct sadb_address *addr;
2729 struct sadb_x_nat_t_port *n_port;
2730 struct sockaddr_in *sin;
2731 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2732 struct sockaddr_in6 *sin6;
2736 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
2737 struct xfrm_encap_tmpl *natt = NULL;
2739 sockaddr_size = pfkey_sockaddr_size(x->props.family);
2751 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
2753 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
2754 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
2757 size = sizeof(struct sadb_msg) +
2758 sizeof(struct sadb_sa) +
2759 (sizeof(struct sadb_address) * 2) +
2760 (sockaddr_size * 2) +
2761 (sizeof(struct sadb_x_nat_t_port) * 2);
2763 skb = alloc_skb(size + 16, GFP_ATOMIC);
2767 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2768 hdr->sadb_msg_version = PF_KEY_V2;
2769 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
2770 hdr->sadb_msg_satype = satype;
2771 hdr->sadb_msg_len = size / sizeof(uint64_t);
2772 hdr->sadb_msg_errno = 0;
2773 hdr->sadb_msg_reserved = 0;
2774 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
2775 hdr->sadb_msg_pid = 0;
2778 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
2779 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
2780 sa->sadb_sa_exttype = SADB_EXT_SA;
2781 sa->sadb_sa_spi = x->id.spi;
2782 sa->sadb_sa_replay = 0;
2783 sa->sadb_sa_state = 0;
2784 sa->sadb_sa_auth = 0;
2785 sa->sadb_sa_encrypt = 0;
2786 sa->sadb_sa_flags = 0;
2788 /* ADDRESS_SRC (old addr) */
2789 addr = (struct sadb_address*)
2790 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
2791 addr->sadb_address_len =
2792 (sizeof(struct sadb_address)+sockaddr_size)/
2794 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2795 addr->sadb_address_proto = 0;
2796 addr->sadb_address_reserved = 0;
2797 if (x->props.family == AF_INET) {
2798 addr->sadb_address_prefixlen = 32;
2800 sin = (struct sockaddr_in *) (addr + 1);
2801 sin->sin_family = AF_INET;
2802 sin->sin_addr.s_addr = x->props.saddr.a4;
2804 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2806 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2807 else if (x->props.family == AF_INET6) {
2808 addr->sadb_address_prefixlen = 128;
2810 sin6 = (struct sockaddr_in6 *) (addr + 1);
2811 sin6->sin6_family = AF_INET6;
2812 sin6->sin6_port = 0;
2813 sin6->sin6_flowinfo = 0;
2814 memcpy(&sin6->sin6_addr,
2815 x->props.saddr.a6, sizeof(struct in6_addr));
2816 sin6->sin6_scope_id = 0;
2822 /* NAT_T_SPORT (old port) */
2823 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
2824 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
2825 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
2826 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
2827 n_port->sadb_x_nat_t_port_reserved = 0;
2829 /* ADDRESS_DST (new addr) */
2830 addr = (struct sadb_address*)
2831 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
2832 addr->sadb_address_len =
2833 (sizeof(struct sadb_address)+sockaddr_size)/
2835 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2836 addr->sadb_address_proto = 0;
2837 addr->sadb_address_reserved = 0;
2838 if (x->props.family == AF_INET) {
2839 addr->sadb_address_prefixlen = 32;
2841 sin = (struct sockaddr_in *) (addr + 1);
2842 sin->sin_family = AF_INET;
2843 sin->sin_addr.s_addr = ipaddr->a4;
2845 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2847 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2848 else if (x->props.family == AF_INET6) {
2849 addr->sadb_address_prefixlen = 128;
2851 sin6 = (struct sockaddr_in6 *) (addr + 1);
2852 sin6->sin6_family = AF_INET6;
2853 sin6->sin6_port = 0;
2854 sin6->sin6_flowinfo = 0;
2855 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
2856 sin6->sin6_scope_id = 0;
2862 /* NAT_T_DPORT (new port) */
2863 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
2864 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
2865 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
2866 n_port->sadb_x_nat_t_port_port = sport;
2867 n_port->sadb_x_nat_t_port_reserved = 0;
2869 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2872 static int pfkey_sendmsg(struct kiocb *kiocb,
2873 struct socket *sock, struct msghdr *msg, size_t len)
2875 struct sock *sk = sock->sk;
2876 struct sk_buff *skb = NULL;
2877 struct sadb_msg *hdr = NULL;
2881 if (msg->msg_flags & MSG_OOB)
2885 if ((unsigned)len > sk->sk_sndbuf - 32)
2889 skb = alloc_skb(len, GFP_KERNEL);
2894 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
2897 hdr = pfkey_get_base_msg(skb, &err);
2901 down(&xfrm_cfg_sem);
2902 err = pfkey_process(sk, skb, hdr);
2906 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
2914 static int pfkey_recvmsg(struct kiocb *kiocb,
2915 struct socket *sock, struct msghdr *msg, size_t len,
2918 struct sock *sk = sock->sk;
2919 struct sk_buff *skb;
2923 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
2926 msg->msg_namelen = 0;
2927 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
2933 msg->msg_flags |= MSG_TRUNC;
2937 skb->h.raw = skb->data;
2938 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
2942 sock_recv_timestamp(msg, sk, skb);
2944 err = (flags & MSG_TRUNC) ? skb->len : copied;
2947 skb_free_datagram(sk, skb);
2952 static struct proto_ops pfkey_ops = {
2954 .owner = THIS_MODULE,
2955 /* Operations that make no sense on pfkey sockets. */
2956 .bind = sock_no_bind,
2957 .connect = sock_no_connect,
2958 .socketpair = sock_no_socketpair,
2959 .accept = sock_no_accept,
2960 .getname = sock_no_getname,
2961 .ioctl = sock_no_ioctl,
2962 .listen = sock_no_listen,
2963 .shutdown = sock_no_shutdown,
2964 .setsockopt = sock_no_setsockopt,
2965 .getsockopt = sock_no_getsockopt,
2966 .mmap = sock_no_mmap,
2967 .sendpage = sock_no_sendpage,
2969 /* Now the operations that really occur. */
2970 .release = pfkey_release,
2971 .poll = datagram_poll,
2972 .sendmsg = pfkey_sendmsg,
2973 .recvmsg = pfkey_recvmsg,
2976 static struct net_proto_family pfkey_family_ops = {
2978 .create = pfkey_create,
2979 .owner = THIS_MODULE,
2982 #ifdef CONFIG_PROC_FS
2983 static int pfkey_read_proc(char *buffer, char **start, off_t offset,
2984 int length, int *eof, void *data)
2990 struct hlist_node *node;
2992 len += sprintf(buffer,"sk RefCnt Rmem Wmem User Inode\n");
2994 read_lock(&pfkey_table_lock);
2996 sk_for_each(s, node, &pfkey_table) {
2997 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
2999 atomic_read(&s->sk_refcnt),
3000 atomic_read(&s->sk_rmem_alloc),
3001 atomic_read(&s->sk_wmem_alloc),
3006 buffer[len++] = '\n';
3013 if(pos > offset + length)
3019 read_unlock(&pfkey_table_lock);
3021 *start = buffer + (offset - begin);
3022 len -= (offset - begin);
3033 static struct xfrm_mgr pfkeyv2_mgr =
3036 .notify = pfkey_send_notify,
3037 .acquire = pfkey_send_acquire,
3038 .compile_policy = pfkey_compile_policy,
3039 .new_mapping = pfkey_send_new_mapping,
3040 .notify_policy = pfkey_send_policy_notify,
3043 static void __exit ipsec_pfkey_exit(void)
3045 xfrm_unregister_km(&pfkeyv2_mgr);
3046 remove_proc_entry("net/pfkey", NULL);
3047 sock_unregister(PF_KEY);
3048 proto_unregister(&key_proto);
3051 static int __init ipsec_pfkey_init(void)
3053 int err = proto_register(&key_proto, 0);
3058 err = sock_register(&pfkey_family_ops);
3060 goto out_unregister_key_proto;
3061 #ifdef CONFIG_PROC_FS
3063 if (create_proc_read_entry("net/pfkey", 0, NULL, pfkey_read_proc, NULL) == NULL)
3064 goto out_sock_unregister;
3066 err = xfrm_register_km(&pfkeyv2_mgr);
3068 goto out_remove_proc_entry;
3071 out_remove_proc_entry:
3072 #ifdef CONFIG_PROC_FS
3073 remove_proc_entry("net/pfkey", NULL);
3074 out_sock_unregister:
3076 sock_unregister(PF_KEY);
3077 out_unregister_key_proto:
3078 proto_unregister(&key_proto);
3082 module_init(ipsec_pfkey_init);
3083 module_exit(ipsec_pfkey_exit);
3084 MODULE_LICENSE("GPL");
3085 MODULE_ALIAS_NETPROTO(PF_KEY);