2 * net/key/af_key.c An implementation of PF_KEYv2 sockets.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
9 * Authors: Maxim Giryaev <gem@asplinux.ru>
10 * David S. Miller <davem@redhat.com>
11 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
12 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
14 * Derek Atkins <derek@ihtfp.com>
17 #include <linux/capability.h>
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/socket.h>
21 #include <linux/pfkeyv2.h>
22 #include <linux/ipsec.h>
23 #include <linux/skbuff.h>
24 #include <linux/rtnetlink.h>
26 #include <linux/in6.h>
27 #include <linux/proc_fs.h>
28 #include <linux/init.h>
29 #include <net/net_namespace.h>
34 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
35 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
38 /* List of all pfkey sockets. */
39 static HLIST_HEAD(pfkey_table);
40 static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
41 static DEFINE_RWLOCK(pfkey_table_lock);
42 static atomic_t pfkey_table_users = ATOMIC_INIT(0);
44 static atomic_t pfkey_socks_nr = ATOMIC_INIT(0);
47 /* struct sock must be the first member of struct pfkey_sock */
53 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
55 return (struct pfkey_sock *)sk;
58 static void pfkey_sock_destruct(struct sock *sk)
60 skb_queue_purge(&sk->sk_receive_queue);
62 if (!sock_flag(sk, SOCK_DEAD)) {
63 printk("Attempt to release alive pfkey socket: %p\n", sk);
67 BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
68 BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
70 atomic_dec(&pfkey_socks_nr);
73 static void pfkey_table_grab(void)
75 write_lock_bh(&pfkey_table_lock);
77 if (atomic_read(&pfkey_table_users)) {
78 DECLARE_WAITQUEUE(wait, current);
80 add_wait_queue_exclusive(&pfkey_table_wait, &wait);
82 set_current_state(TASK_UNINTERRUPTIBLE);
83 if (atomic_read(&pfkey_table_users) == 0)
85 write_unlock_bh(&pfkey_table_lock);
87 write_lock_bh(&pfkey_table_lock);
90 __set_current_state(TASK_RUNNING);
91 remove_wait_queue(&pfkey_table_wait, &wait);
95 static __inline__ void pfkey_table_ungrab(void)
97 write_unlock_bh(&pfkey_table_lock);
98 wake_up(&pfkey_table_wait);
101 static __inline__ void pfkey_lock_table(void)
103 /* read_lock() synchronizes us to pfkey_table_grab */
105 read_lock(&pfkey_table_lock);
106 atomic_inc(&pfkey_table_users);
107 read_unlock(&pfkey_table_lock);
110 static __inline__ void pfkey_unlock_table(void)
112 if (atomic_dec_and_test(&pfkey_table_users))
113 wake_up(&pfkey_table_wait);
117 static const struct proto_ops pfkey_ops;
119 static void pfkey_insert(struct sock *sk)
122 sk_add_node(sk, &pfkey_table);
123 pfkey_table_ungrab();
126 static void pfkey_remove(struct sock *sk)
129 sk_del_node_init(sk);
130 pfkey_table_ungrab();
133 static struct proto key_proto = {
135 .owner = THIS_MODULE,
136 .obj_size = sizeof(struct pfkey_sock),
139 static int pfkey_create(struct net *net, struct socket *sock, int protocol)
144 if (net != &init_net)
145 return -EAFNOSUPPORT;
147 if (!capable(CAP_NET_ADMIN))
149 if (sock->type != SOCK_RAW)
150 return -ESOCKTNOSUPPORT;
151 if (protocol != PF_KEY_V2)
152 return -EPROTONOSUPPORT;
155 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto, 1);
159 sock->ops = &pfkey_ops;
160 sock_init_data(sock, sk);
162 sk->sk_family = PF_KEY;
163 sk->sk_destruct = pfkey_sock_destruct;
165 atomic_inc(&pfkey_socks_nr);
174 static int pfkey_release(struct socket *sock)
176 struct sock *sk = sock->sk;
185 skb_queue_purge(&sk->sk_write_queue);
191 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
192 gfp_t allocation, struct sock *sk)
198 if (atomic_read(&skb->users) != 1) {
199 *skb2 = skb_clone(skb, allocation);
202 atomic_inc(&skb->users);
206 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
208 skb_set_owner_r(*skb2, sk);
209 skb_queue_tail(&sk->sk_receive_queue, *skb2);
210 sk->sk_data_ready(sk, (*skb2)->len);
219 /* Send SKB to all pfkey sockets matching selected criteria. */
220 #define BROADCAST_ALL 0
221 #define BROADCAST_ONE 1
222 #define BROADCAST_REGISTERED 2
223 #define BROADCAST_PROMISC_ONLY 4
224 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
225 int broadcast_flags, struct sock *one_sk)
228 struct hlist_node *node;
229 struct sk_buff *skb2 = NULL;
232 /* XXX Do we need something like netlink_overrun? I think
233 * XXX PF_KEY socket apps will not mind current behavior.
239 sk_for_each(sk, node, &pfkey_table) {
240 struct pfkey_sock *pfk = pfkey_sk(sk);
243 /* Yes, it means that if you are meant to receive this
244 * pfkey message you receive it twice as promiscuous
248 pfkey_broadcast_one(skb, &skb2, allocation, sk);
250 /* the exact target will be processed later */
253 if (broadcast_flags != BROADCAST_ALL) {
254 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
256 if ((broadcast_flags & BROADCAST_REGISTERED) &&
259 if (broadcast_flags & BROADCAST_ONE)
263 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
265 /* Error is cleare after succecful sending to at least one
267 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
270 pfkey_unlock_table();
273 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
281 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
286 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
288 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
289 struct sadb_msg *hdr;
294 /* Woe be to the platform trying to support PFKEY yet
295 * having normal errnos outside the 1-255 range, inclusive.
298 if (err == ERESTARTSYS ||
299 err == ERESTARTNOHAND ||
300 err == ERESTARTNOINTR)
304 BUG_ON(err <= 0 || err >= 256);
306 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
307 pfkey_hdr_dup(hdr, orig);
308 hdr->sadb_msg_errno = (uint8_t) err;
309 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
312 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
317 static u8 sadb_ext_min_len[] = {
318 [SADB_EXT_RESERVED] = (u8) 0,
319 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
320 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
321 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
322 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
323 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
324 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
325 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
326 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
327 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
328 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
329 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
330 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
331 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
332 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
333 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
334 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
335 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
336 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
337 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
338 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
339 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
340 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
341 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
342 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
345 /* Verify sadb_address_{len,prefixlen} against sa_family. */
346 static int verify_address_len(void *p)
348 struct sadb_address *sp = p;
349 struct sockaddr *addr = (struct sockaddr *)(sp + 1);
350 struct sockaddr_in *sin;
351 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
352 struct sockaddr_in6 *sin6;
356 switch (addr->sa_family) {
358 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
359 if (sp->sadb_address_len != len ||
360 sp->sadb_address_prefixlen > 32)
363 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
365 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
366 if (sp->sadb_address_len != len ||
367 sp->sadb_address_prefixlen > 128)
372 /* It is user using kernel to keep track of security
373 * associations for another protocol, such as
374 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
377 * XXX Actually, association/policy database is not yet
378 * XXX able to cope with arbitrary sockaddr families.
379 * XXX When it can, remove this -EINVAL. -DaveM
388 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
390 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
391 sec_ctx->sadb_x_ctx_len,
395 static inline int verify_sec_ctx_len(void *p)
397 struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
400 if (sec_ctx->sadb_x_ctx_len > PAGE_SIZE)
403 len = pfkey_sec_ctx_len(sec_ctx);
405 if (sec_ctx->sadb_x_sec_len != len)
411 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
413 struct xfrm_user_sec_ctx *uctx = NULL;
414 int ctx_size = sec_ctx->sadb_x_ctx_len;
416 uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
421 uctx->len = pfkey_sec_ctx_len(sec_ctx);
422 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
423 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
424 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
425 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
426 memcpy(uctx + 1, sec_ctx + 1,
432 static int present_and_same_family(struct sadb_address *src,
433 struct sadb_address *dst)
435 struct sockaddr *s_addr, *d_addr;
440 s_addr = (struct sockaddr *)(src + 1);
441 d_addr = (struct sockaddr *)(dst + 1);
442 if (s_addr->sa_family != d_addr->sa_family)
444 if (s_addr->sa_family != AF_INET
445 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
446 && s_addr->sa_family != AF_INET6
454 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
456 char *p = (char *) hdr;
462 struct sadb_ext *ehdr = (struct sadb_ext *) p;
466 ext_len = ehdr->sadb_ext_len;
467 ext_len *= sizeof(uint64_t);
468 ext_type = ehdr->sadb_ext_type;
469 if (ext_len < sizeof(uint64_t) ||
471 ext_type == SADB_EXT_RESERVED)
474 if (ext_type <= SADB_EXT_MAX) {
475 int min = (int) sadb_ext_min_len[ext_type];
478 if (ext_hdrs[ext_type-1] != NULL)
480 if (ext_type == SADB_EXT_ADDRESS_SRC ||
481 ext_type == SADB_EXT_ADDRESS_DST ||
482 ext_type == SADB_EXT_ADDRESS_PROXY ||
483 ext_type == SADB_X_EXT_NAT_T_OA) {
484 if (verify_address_len(p))
487 if (ext_type == SADB_X_EXT_SEC_CTX) {
488 if (verify_sec_ctx_len(p))
491 ext_hdrs[ext_type-1] = p;
501 pfkey_satype2proto(uint8_t satype)
504 case SADB_SATYPE_UNSPEC:
505 return IPSEC_PROTO_ANY;
508 case SADB_SATYPE_ESP:
510 case SADB_X_SATYPE_IPCOMP:
520 pfkey_proto2satype(uint16_t proto)
524 return SADB_SATYPE_AH;
526 return SADB_SATYPE_ESP;
528 return SADB_X_SATYPE_IPCOMP;
536 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
537 * say specifically 'just raw sockets' as we encode them as 255.
540 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
542 return (proto == IPSEC_PROTO_ANY ? 0 : proto);
545 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
547 return (proto ? proto : IPSEC_PROTO_ANY);
550 static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
551 xfrm_address_t *xaddr)
553 switch (((struct sockaddr*)(addr + 1))->sa_family) {
556 ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
558 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
561 &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
562 sizeof(struct in6_addr));
571 static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
574 struct sadb_address *addr;
576 unsigned short family;
577 xfrm_address_t *xaddr;
579 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
583 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
587 /* sadb_address_len should be checked by caller */
588 addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
592 family = ((struct sockaddr *)(addr + 1))->sa_family;
595 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
597 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
599 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
609 return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
612 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
614 pfkey_sockaddr_size(sa_family_t family)
618 return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
619 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
621 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
629 static inline int pfkey_mode_from_xfrm(int mode)
632 case XFRM_MODE_TRANSPORT:
633 return IPSEC_MODE_TRANSPORT;
634 case XFRM_MODE_TUNNEL:
635 return IPSEC_MODE_TUNNEL;
637 return IPSEC_MODE_BEET;
643 static inline int pfkey_mode_to_xfrm(int mode)
646 case IPSEC_MODE_ANY: /*XXX*/
647 case IPSEC_MODE_TRANSPORT:
648 return XFRM_MODE_TRANSPORT;
649 case IPSEC_MODE_TUNNEL:
650 return XFRM_MODE_TUNNEL;
651 case IPSEC_MODE_BEET:
652 return XFRM_MODE_BEET;
658 static struct sk_buff * pfkey_xfrm_state2msg(struct xfrm_state *x, int add_keys, int hsc)
661 struct sadb_msg *hdr;
663 struct sadb_lifetime *lifetime;
664 struct sadb_address *addr;
665 struct sadb_key *key;
666 struct sadb_x_sa2 *sa2;
667 struct sockaddr_in *sin;
668 struct sadb_x_sec_ctx *sec_ctx;
669 struct xfrm_sec_ctx *xfrm_ctx;
671 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
672 struct sockaddr_in6 *sin6;
675 int auth_key_size = 0;
676 int encrypt_key_size = 0;
678 struct xfrm_encap_tmpl *natt = NULL;
681 /* address family check */
682 sockaddr_size = pfkey_sockaddr_size(x->props.family);
684 return ERR_PTR(-EINVAL);
686 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
687 key(AE), (identity(SD),) (sensitivity)> */
688 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
689 sizeof(struct sadb_lifetime) +
690 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
691 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
692 sizeof(struct sadb_address)*2 +
694 sizeof(struct sadb_x_sa2);
696 if ((xfrm_ctx = x->security)) {
697 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
698 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
701 /* identity & sensitivity */
703 if ((x->props.family == AF_INET &&
704 x->sel.saddr.a4 != x->props.saddr.a4)
705 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
706 || (x->props.family == AF_INET6 &&
707 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
710 size += sizeof(struct sadb_address) + sockaddr_size;
713 if (x->aalg && x->aalg->alg_key_len) {
715 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
716 size += sizeof(struct sadb_key) + auth_key_size;
718 if (x->ealg && x->ealg->alg_key_len) {
720 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
721 size += sizeof(struct sadb_key) + encrypt_key_size;
727 if (natt && natt->encap_type) {
728 size += sizeof(struct sadb_x_nat_t_type);
729 size += sizeof(struct sadb_x_nat_t_port);
730 size += sizeof(struct sadb_x_nat_t_port);
733 skb = alloc_skb(size + 16, GFP_ATOMIC);
735 return ERR_PTR(-ENOBUFS);
737 /* call should fill header later */
738 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
739 memset(hdr, 0, size); /* XXX do we need this ? */
740 hdr->sadb_msg_len = size / sizeof(uint64_t);
743 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
744 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
745 sa->sadb_sa_exttype = SADB_EXT_SA;
746 sa->sadb_sa_spi = x->id.spi;
747 sa->sadb_sa_replay = x->props.replay_window;
748 switch (x->km.state) {
749 case XFRM_STATE_VALID:
750 sa->sadb_sa_state = x->km.dying ?
751 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
754 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
757 sa->sadb_sa_state = SADB_SASTATE_DEAD;
760 sa->sadb_sa_auth = 0;
762 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
763 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
765 sa->sadb_sa_encrypt = 0;
766 BUG_ON(x->ealg && x->calg);
768 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
769 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
771 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
773 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
774 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
777 sa->sadb_sa_flags = 0;
778 if (x->props.flags & XFRM_STATE_NOECN)
779 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
780 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
781 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
782 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
783 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
787 lifetime = (struct sadb_lifetime *) skb_put(skb,
788 sizeof(struct sadb_lifetime));
789 lifetime->sadb_lifetime_len =
790 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
791 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
792 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
793 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
794 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
795 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
799 lifetime = (struct sadb_lifetime *) skb_put(skb,
800 sizeof(struct sadb_lifetime));
801 lifetime->sadb_lifetime_len =
802 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
803 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
804 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
805 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
806 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
807 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
810 lifetime = (struct sadb_lifetime *) skb_put(skb,
811 sizeof(struct sadb_lifetime));
812 lifetime->sadb_lifetime_len =
813 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
814 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
815 lifetime->sadb_lifetime_allocations = x->curlft.packets;
816 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
817 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
818 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
820 addr = (struct sadb_address*) skb_put(skb,
821 sizeof(struct sadb_address)+sockaddr_size);
822 addr->sadb_address_len =
823 (sizeof(struct sadb_address)+sockaddr_size)/
825 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
826 /* "if the ports are non-zero, then the sadb_address_proto field,
827 normally zero, MUST be filled in with the transport
828 protocol's number." - RFC2367 */
829 addr->sadb_address_proto = 0;
830 addr->sadb_address_reserved = 0;
831 if (x->props.family == AF_INET) {
832 addr->sadb_address_prefixlen = 32;
834 sin = (struct sockaddr_in *) (addr + 1);
835 sin->sin_family = AF_INET;
836 sin->sin_addr.s_addr = x->props.saddr.a4;
838 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
840 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
841 else if (x->props.family == AF_INET6) {
842 addr->sadb_address_prefixlen = 128;
844 sin6 = (struct sockaddr_in6 *) (addr + 1);
845 sin6->sin6_family = AF_INET6;
847 sin6->sin6_flowinfo = 0;
848 memcpy(&sin6->sin6_addr, x->props.saddr.a6,
849 sizeof(struct in6_addr));
850 sin6->sin6_scope_id = 0;
857 addr = (struct sadb_address*) skb_put(skb,
858 sizeof(struct sadb_address)+sockaddr_size);
859 addr->sadb_address_len =
860 (sizeof(struct sadb_address)+sockaddr_size)/
862 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
863 addr->sadb_address_proto = 0;
864 addr->sadb_address_prefixlen = 32; /* XXX */
865 addr->sadb_address_reserved = 0;
866 if (x->props.family == AF_INET) {
867 sin = (struct sockaddr_in *) (addr + 1);
868 sin->sin_family = AF_INET;
869 sin->sin_addr.s_addr = x->id.daddr.a4;
871 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
873 if (x->sel.saddr.a4 != x->props.saddr.a4) {
874 addr = (struct sadb_address*) skb_put(skb,
875 sizeof(struct sadb_address)+sockaddr_size);
876 addr->sadb_address_len =
877 (sizeof(struct sadb_address)+sockaddr_size)/
879 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
880 addr->sadb_address_proto =
881 pfkey_proto_from_xfrm(x->sel.proto);
882 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
883 addr->sadb_address_reserved = 0;
885 sin = (struct sockaddr_in *) (addr + 1);
886 sin->sin_family = AF_INET;
887 sin->sin_addr.s_addr = x->sel.saddr.a4;
888 sin->sin_port = x->sel.sport;
889 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
892 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
893 else if (x->props.family == AF_INET6) {
894 addr->sadb_address_prefixlen = 128;
896 sin6 = (struct sockaddr_in6 *) (addr + 1);
897 sin6->sin6_family = AF_INET6;
899 sin6->sin6_flowinfo = 0;
900 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
901 sin6->sin6_scope_id = 0;
903 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
904 sizeof(struct in6_addr))) {
905 addr = (struct sadb_address *) skb_put(skb,
906 sizeof(struct sadb_address)+sockaddr_size);
907 addr->sadb_address_len =
908 (sizeof(struct sadb_address)+sockaddr_size)/
910 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
911 addr->sadb_address_proto =
912 pfkey_proto_from_xfrm(x->sel.proto);
913 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
914 addr->sadb_address_reserved = 0;
916 sin6 = (struct sockaddr_in6 *) (addr + 1);
917 sin6->sin6_family = AF_INET6;
918 sin6->sin6_port = x->sel.sport;
919 sin6->sin6_flowinfo = 0;
920 memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
921 sizeof(struct in6_addr));
922 sin6->sin6_scope_id = 0;
930 if (add_keys && auth_key_size) {
931 key = (struct sadb_key *) skb_put(skb,
932 sizeof(struct sadb_key)+auth_key_size);
933 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
935 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
936 key->sadb_key_bits = x->aalg->alg_key_len;
937 key->sadb_key_reserved = 0;
938 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
941 if (add_keys && encrypt_key_size) {
942 key = (struct sadb_key *) skb_put(skb,
943 sizeof(struct sadb_key)+encrypt_key_size);
944 key->sadb_key_len = (sizeof(struct sadb_key) +
945 encrypt_key_size) / sizeof(uint64_t);
946 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
947 key->sadb_key_bits = x->ealg->alg_key_len;
948 key->sadb_key_reserved = 0;
949 memcpy(key + 1, x->ealg->alg_key,
950 (x->ealg->alg_key_len+7)/8);
954 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
955 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
956 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
957 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
959 return ERR_PTR(-EINVAL);
961 sa2->sadb_x_sa2_mode = mode;
962 sa2->sadb_x_sa2_reserved1 = 0;
963 sa2->sadb_x_sa2_reserved2 = 0;
964 sa2->sadb_x_sa2_sequence = 0;
965 sa2->sadb_x_sa2_reqid = x->props.reqid;
967 if (natt && natt->encap_type) {
968 struct sadb_x_nat_t_type *n_type;
969 struct sadb_x_nat_t_port *n_port;
972 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
973 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
974 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
975 n_type->sadb_x_nat_t_type_type = natt->encap_type;
976 n_type->sadb_x_nat_t_type_reserved[0] = 0;
977 n_type->sadb_x_nat_t_type_reserved[1] = 0;
978 n_type->sadb_x_nat_t_type_reserved[2] = 0;
981 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
982 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
983 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
984 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
985 n_port->sadb_x_nat_t_port_reserved = 0;
988 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
989 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
990 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
991 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
992 n_port->sadb_x_nat_t_port_reserved = 0;
995 /* security context */
997 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
998 sizeof(struct sadb_x_sec_ctx) + ctx_size);
999 sec_ctx->sadb_x_sec_len =
1000 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1001 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1002 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1003 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1004 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1005 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1012 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1015 struct xfrm_state *x;
1016 struct sadb_lifetime *lifetime;
1018 struct sadb_key *key;
1019 struct sadb_x_sec_ctx *sec_ctx;
1024 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1026 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1027 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1028 return ERR_PTR(-EINVAL);
1029 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1030 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1031 return ERR_PTR(-EINVAL);
1032 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1033 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1034 return ERR_PTR(-EINVAL);
1035 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1036 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1037 return ERR_PTR(-EINVAL);
1039 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1041 return ERR_PTR(-EINVAL);
1043 /* default error is no buffer space */
1048 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1049 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1050 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1051 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1052 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1055 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1056 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1058 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1059 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1060 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1061 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1062 return ERR_PTR(-EINVAL);
1063 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1065 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1066 ((key->sadb_key_bits+7) / 8 == 0 ||
1067 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1068 return ERR_PTR(-EINVAL);
1069 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1071 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1072 ((key->sadb_key_bits+7) / 8 == 0 ||
1073 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1074 return ERR_PTR(-EINVAL);
1076 x = xfrm_state_alloc();
1078 return ERR_PTR(-ENOBUFS);
1080 x->id.proto = proto;
1081 x->id.spi = sa->sadb_sa_spi;
1082 x->props.replay_window = sa->sadb_sa_replay;
1083 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1084 x->props.flags |= XFRM_STATE_NOECN;
1085 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1086 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1087 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1088 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1090 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1091 if (lifetime != NULL) {
1092 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1093 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1094 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1095 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1097 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1098 if (lifetime != NULL) {
1099 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1100 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1101 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1102 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1105 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1106 if (sec_ctx != NULL) {
1107 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1112 err = security_xfrm_state_alloc(x, uctx);
1119 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1120 if (sa->sadb_sa_auth) {
1122 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1128 keysize = (key->sadb_key_bits + 7) / 8;
1129 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1132 strcpy(x->aalg->alg_name, a->name);
1133 x->aalg->alg_key_len = 0;
1135 x->aalg->alg_key_len = key->sadb_key_bits;
1136 memcpy(x->aalg->alg_key, key+1, keysize);
1138 x->props.aalgo = sa->sadb_sa_auth;
1139 /* x->algo.flags = sa->sadb_sa_flags; */
1141 if (sa->sadb_sa_encrypt) {
1142 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1143 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1148 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1151 strcpy(x->calg->alg_name, a->name);
1152 x->props.calgo = sa->sadb_sa_encrypt;
1155 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1160 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1162 keysize = (key->sadb_key_bits + 7) / 8;
1163 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1166 strcpy(x->ealg->alg_name, a->name);
1167 x->ealg->alg_key_len = 0;
1169 x->ealg->alg_key_len = key->sadb_key_bits;
1170 memcpy(x->ealg->alg_key, key+1, keysize);
1172 x->props.ealgo = sa->sadb_sa_encrypt;
1175 /* x->algo.flags = sa->sadb_sa_flags; */
1177 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1179 if (!x->props.family) {
1180 err = -EAFNOSUPPORT;
1183 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1186 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1187 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1188 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1193 x->props.mode = mode;
1194 x->props.reqid = sa2->sadb_x_sa2_reqid;
1197 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1198 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1200 /* Nobody uses this, but we try. */
1201 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1202 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1206 x->sel.family = x->props.family;
1208 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1209 struct sadb_x_nat_t_type* n_type;
1210 struct xfrm_encap_tmpl *natt;
1212 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1217 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1218 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1220 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1221 struct sadb_x_nat_t_port* n_port =
1222 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1223 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1225 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1226 struct sadb_x_nat_t_port* n_port =
1227 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1228 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1232 err = xfrm_init_state(x);
1236 x->km.seq = hdr->sadb_msg_seq;
1240 x->km.state = XFRM_STATE_DEAD;
1242 return ERR_PTR(err);
1245 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1250 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1252 struct sk_buff *resp_skb;
1253 struct sadb_x_sa2 *sa2;
1254 struct sadb_address *saddr, *daddr;
1255 struct sadb_msg *out_hdr;
1256 struct xfrm_state *x = NULL;
1260 unsigned short family;
1261 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1263 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1264 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1267 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1271 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1272 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1275 reqid = sa2->sadb_x_sa2_reqid;
1281 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1282 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1284 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1287 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1288 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1290 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1292 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1293 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1298 if (hdr->sadb_msg_seq) {
1299 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1300 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1307 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1312 resp_skb = ERR_PTR(-ENOENT);
1314 spin_lock_bh(&x->lock);
1315 if (x->km.state != XFRM_STATE_DEAD) {
1316 struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1317 u32 min_spi, max_spi;
1319 if (range != NULL) {
1320 min_spi = range->sadb_spirange_min;
1321 max_spi = range->sadb_spirange_max;
1324 max_spi = 0x0fffffff;
1326 xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi));
1328 resp_skb = pfkey_xfrm_state2msg(x, 0, 3);
1330 spin_unlock_bh(&x->lock);
1332 if (IS_ERR(resp_skb)) {
1334 return PTR_ERR(resp_skb);
1337 out_hdr = (struct sadb_msg *) resp_skb->data;
1338 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1339 out_hdr->sadb_msg_type = SADB_GETSPI;
1340 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1341 out_hdr->sadb_msg_errno = 0;
1342 out_hdr->sadb_msg_reserved = 0;
1343 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1344 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1348 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1353 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1355 struct xfrm_state *x;
1357 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1360 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1363 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1367 spin_lock_bh(&x->lock);
1368 if (x->km.state == XFRM_STATE_ACQ) {
1369 x->km.state = XFRM_STATE_ERROR;
1372 spin_unlock_bh(&x->lock);
1377 static inline int event2poltype(int event)
1380 case XFRM_MSG_DELPOLICY:
1381 return SADB_X_SPDDELETE;
1382 case XFRM_MSG_NEWPOLICY:
1383 return SADB_X_SPDADD;
1384 case XFRM_MSG_UPDPOLICY:
1385 return SADB_X_SPDUPDATE;
1386 case XFRM_MSG_POLEXPIRE:
1387 // return SADB_X_SPDEXPIRE;
1389 printk("pfkey: Unknown policy event %d\n", event);
1396 static inline int event2keytype(int event)
1399 case XFRM_MSG_DELSA:
1401 case XFRM_MSG_NEWSA:
1403 case XFRM_MSG_UPDSA:
1405 case XFRM_MSG_EXPIRE:
1408 printk("pfkey: Unknown SA event %d\n", event);
1416 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1418 struct sk_buff *skb;
1419 struct sadb_msg *hdr;
1422 if (c->event == XFRM_MSG_DELSA)
1425 skb = pfkey_xfrm_state2msg(x, 0, hsc);
1428 return PTR_ERR(skb);
1430 hdr = (struct sadb_msg *) skb->data;
1431 hdr->sadb_msg_version = PF_KEY_V2;
1432 hdr->sadb_msg_type = event2keytype(c->event);
1433 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1434 hdr->sadb_msg_errno = 0;
1435 hdr->sadb_msg_reserved = 0;
1436 hdr->sadb_msg_seq = c->seq;
1437 hdr->sadb_msg_pid = c->pid;
1439 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1444 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1446 struct xfrm_state *x;
1450 x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1455 if (hdr->sadb_msg_type == SADB_ADD)
1456 err = xfrm_state_add(x);
1458 err = xfrm_state_update(x);
1460 xfrm_audit_state_add(x, err ? 0 : 1,
1461 audit_get_loginuid(current->audit_context), 0);
1464 x->km.state = XFRM_STATE_DEAD;
1465 __xfrm_state_put(x);
1469 if (hdr->sadb_msg_type == SADB_ADD)
1470 c.event = XFRM_MSG_NEWSA;
1472 c.event = XFRM_MSG_UPDSA;
1473 c.seq = hdr->sadb_msg_seq;
1474 c.pid = hdr->sadb_msg_pid;
1475 km_state_notify(x, &c);
1481 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1483 struct xfrm_state *x;
1487 if (!ext_hdrs[SADB_EXT_SA-1] ||
1488 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1489 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1492 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1496 if ((err = security_xfrm_state_delete(x)))
1499 if (xfrm_state_kern(x)) {
1504 err = xfrm_state_delete(x);
1509 c.seq = hdr->sadb_msg_seq;
1510 c.pid = hdr->sadb_msg_pid;
1511 c.event = XFRM_MSG_DELSA;
1512 km_state_notify(x, &c);
1514 xfrm_audit_state_delete(x, err ? 0 : 1,
1515 audit_get_loginuid(current->audit_context), 0);
1521 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1524 struct sk_buff *out_skb;
1525 struct sadb_msg *out_hdr;
1526 struct xfrm_state *x;
1528 if (!ext_hdrs[SADB_EXT_SA-1] ||
1529 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1530 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1533 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1537 out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1538 proto = x->id.proto;
1540 if (IS_ERR(out_skb))
1541 return PTR_ERR(out_skb);
1543 out_hdr = (struct sadb_msg *) out_skb->data;
1544 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1545 out_hdr->sadb_msg_type = SADB_DUMP;
1546 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1547 out_hdr->sadb_msg_errno = 0;
1548 out_hdr->sadb_msg_reserved = 0;
1549 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1550 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1551 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1556 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1559 struct sk_buff *skb;
1560 struct sadb_msg *hdr;
1561 int len, auth_len, enc_len, i;
1563 auth_len = xfrm_count_auth_supported();
1565 auth_len *= sizeof(struct sadb_alg);
1566 auth_len += sizeof(struct sadb_supported);
1569 enc_len = xfrm_count_enc_supported();
1571 enc_len *= sizeof(struct sadb_alg);
1572 enc_len += sizeof(struct sadb_supported);
1575 len = enc_len + auth_len + sizeof(struct sadb_msg);
1577 skb = alloc_skb(len + 16, allocation);
1581 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1582 pfkey_hdr_dup(hdr, orig);
1583 hdr->sadb_msg_errno = 0;
1584 hdr->sadb_msg_len = len / sizeof(uint64_t);
1587 struct sadb_supported *sp;
1588 struct sadb_alg *ap;
1590 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1591 ap = (struct sadb_alg *) (sp + 1);
1593 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1594 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1596 for (i = 0; ; i++) {
1597 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1600 if (aalg->available)
1606 struct sadb_supported *sp;
1607 struct sadb_alg *ap;
1609 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1610 ap = (struct sadb_alg *) (sp + 1);
1612 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1613 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1615 for (i = 0; ; i++) {
1616 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1619 if (ealg->available)
1628 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1630 struct pfkey_sock *pfk = pfkey_sk(sk);
1631 struct sk_buff *supp_skb;
1633 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1636 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1637 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1639 pfk->registered |= (1<<hdr->sadb_msg_satype);
1644 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1646 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1647 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1652 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1657 static int key_notify_sa_flush(struct km_event *c)
1659 struct sk_buff *skb;
1660 struct sadb_msg *hdr;
1662 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1665 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1666 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1667 hdr->sadb_msg_type = SADB_FLUSH;
1668 hdr->sadb_msg_seq = c->seq;
1669 hdr->sadb_msg_pid = c->pid;
1670 hdr->sadb_msg_version = PF_KEY_V2;
1671 hdr->sadb_msg_errno = (uint8_t) 0;
1672 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1674 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1679 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1683 struct xfrm_audit audit_info;
1686 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1690 audit_info.loginuid = audit_get_loginuid(current->audit_context);
1691 audit_info.secid = 0;
1692 err = xfrm_state_flush(proto, &audit_info);
1695 c.data.proto = proto;
1696 c.seq = hdr->sadb_msg_seq;
1697 c.pid = hdr->sadb_msg_pid;
1698 c.event = XFRM_MSG_FLUSHSA;
1699 km_state_notify(NULL, &c);
1704 struct pfkey_dump_data
1706 struct sk_buff *skb;
1707 struct sadb_msg *hdr;
1711 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1713 struct pfkey_dump_data *data = ptr;
1714 struct sk_buff *out_skb;
1715 struct sadb_msg *out_hdr;
1717 out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1718 if (IS_ERR(out_skb))
1719 return PTR_ERR(out_skb);
1721 out_hdr = (struct sadb_msg *) out_skb->data;
1722 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1723 out_hdr->sadb_msg_type = SADB_DUMP;
1724 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1725 out_hdr->sadb_msg_errno = 0;
1726 out_hdr->sadb_msg_reserved = 0;
1727 out_hdr->sadb_msg_seq = count;
1728 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1729 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1733 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1736 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1738 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1742 return xfrm_state_walk(proto, dump_sa, &data);
1745 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1747 struct pfkey_sock *pfk = pfkey_sk(sk);
1748 int satype = hdr->sadb_msg_satype;
1750 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1751 /* XXX we mangle packet... */
1752 hdr->sadb_msg_errno = 0;
1753 if (satype != 0 && satype != 1)
1755 pfk->promisc = satype;
1757 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1761 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1764 u32 reqid = *(u32*)ptr;
1766 for (i=0; i<xp->xfrm_nr; i++) {
1767 if (xp->xfrm_vec[i].reqid == reqid)
1773 static u32 gen_reqid(void)
1776 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1782 reqid = IPSEC_MANUAL_REQID_MAX+1;
1783 if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid,
1784 (void*)&reqid) != -EEXIST)
1786 } while (reqid != start);
1791 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1793 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1794 struct sockaddr_in *sin;
1795 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1796 struct sockaddr_in6 *sin6;
1800 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1803 if (rq->sadb_x_ipsecrequest_mode == 0)
1806 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1807 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1810 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1812 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1813 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1814 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1816 if (!t->reqid && !(t->reqid = gen_reqid()))
1820 /* addresses present only in tunnel mode */
1821 if (t->mode == XFRM_MODE_TUNNEL) {
1822 struct sockaddr *sa;
1823 sa = (struct sockaddr *)(rq+1);
1824 switch(sa->sa_family) {
1826 sin = (struct sockaddr_in*)sa;
1827 t->saddr.a4 = sin->sin_addr.s_addr;
1829 if (sin->sin_family != AF_INET)
1831 t->id.daddr.a4 = sin->sin_addr.s_addr;
1833 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1835 sin6 = (struct sockaddr_in6*)sa;
1836 memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1838 if (sin6->sin6_family != AF_INET6)
1840 memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1846 t->encap_family = sa->sa_family;
1848 t->encap_family = xp->family;
1850 /* No way to set this via kame pfkey */
1851 t->aalgos = t->ealgos = t->calgos = ~0;
1857 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1860 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1861 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1863 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1864 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1866 len -= rq->sadb_x_ipsecrequest_len;
1867 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1872 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1874 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1877 int len = sizeof(struct sadb_x_sec_ctx);
1878 len += xfrm_ctx->ctx_len;
1879 return PFKEY_ALIGN8(len);
1884 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1886 struct xfrm_tmpl *t;
1887 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1891 for (i=0; i<xp->xfrm_nr; i++) {
1892 t = xp->xfrm_vec + i;
1893 socklen += (t->encap_family == AF_INET ?
1894 sizeof(struct sockaddr_in) :
1895 sizeof(struct sockaddr_in6));
1898 return sizeof(struct sadb_msg) +
1899 (sizeof(struct sadb_lifetime) * 3) +
1900 (sizeof(struct sadb_address) * 2) +
1901 (sockaddr_size * 2) +
1902 sizeof(struct sadb_x_policy) +
1903 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1905 pfkey_xfrm_policy2sec_ctx_size(xp);
1908 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1910 struct sk_buff *skb;
1913 size = pfkey_xfrm_policy2msg_size(xp);
1915 skb = alloc_skb(size + 16, GFP_ATOMIC);
1917 return ERR_PTR(-ENOBUFS);
1922 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1924 struct sadb_msg *hdr;
1925 struct sadb_address *addr;
1926 struct sadb_lifetime *lifetime;
1927 struct sadb_x_policy *pol;
1928 struct sockaddr_in *sin;
1929 struct sadb_x_sec_ctx *sec_ctx;
1930 struct xfrm_sec_ctx *xfrm_ctx;
1931 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1932 struct sockaddr_in6 *sin6;
1936 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1937 int socklen = (xp->family == AF_INET ?
1938 sizeof(struct sockaddr_in) :
1939 sizeof(struct sockaddr_in6));
1941 size = pfkey_xfrm_policy2msg_size(xp);
1943 /* call should fill header later */
1944 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1945 memset(hdr, 0, size); /* XXX do we need this ? */
1948 addr = (struct sadb_address*) skb_put(skb,
1949 sizeof(struct sadb_address)+sockaddr_size);
1950 addr->sadb_address_len =
1951 (sizeof(struct sadb_address)+sockaddr_size)/
1953 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1954 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1955 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1956 addr->sadb_address_reserved = 0;
1958 if (xp->family == AF_INET) {
1959 sin = (struct sockaddr_in *) (addr + 1);
1960 sin->sin_family = AF_INET;
1961 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1962 sin->sin_port = xp->selector.sport;
1963 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1965 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1966 else if (xp->family == AF_INET6) {
1967 sin6 = (struct sockaddr_in6 *) (addr + 1);
1968 sin6->sin6_family = AF_INET6;
1969 sin6->sin6_port = xp->selector.sport;
1970 sin6->sin6_flowinfo = 0;
1971 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1972 sizeof(struct in6_addr));
1973 sin6->sin6_scope_id = 0;
1980 addr = (struct sadb_address*) skb_put(skb,
1981 sizeof(struct sadb_address)+sockaddr_size);
1982 addr->sadb_address_len =
1983 (sizeof(struct sadb_address)+sockaddr_size)/
1985 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1986 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1987 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1988 addr->sadb_address_reserved = 0;
1989 if (xp->family == AF_INET) {
1990 sin = (struct sockaddr_in *) (addr + 1);
1991 sin->sin_family = AF_INET;
1992 sin->sin_addr.s_addr = xp->selector.daddr.a4;
1993 sin->sin_port = xp->selector.dport;
1994 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1996 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1997 else if (xp->family == AF_INET6) {
1998 sin6 = (struct sockaddr_in6 *) (addr + 1);
1999 sin6->sin6_family = AF_INET6;
2000 sin6->sin6_port = xp->selector.dport;
2001 sin6->sin6_flowinfo = 0;
2002 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2003 sizeof(struct in6_addr));
2004 sin6->sin6_scope_id = 0;
2011 lifetime = (struct sadb_lifetime *) skb_put(skb,
2012 sizeof(struct sadb_lifetime));
2013 lifetime->sadb_lifetime_len =
2014 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2015 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2016 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2017 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2018 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2019 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2021 lifetime = (struct sadb_lifetime *) skb_put(skb,
2022 sizeof(struct sadb_lifetime));
2023 lifetime->sadb_lifetime_len =
2024 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2025 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2026 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2027 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2028 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2029 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2031 lifetime = (struct sadb_lifetime *) skb_put(skb,
2032 sizeof(struct sadb_lifetime));
2033 lifetime->sadb_lifetime_len =
2034 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2035 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2036 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2037 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2038 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2039 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2041 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2042 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2043 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2044 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2045 if (xp->action == XFRM_POLICY_ALLOW) {
2047 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2049 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2051 pol->sadb_x_policy_dir = dir+1;
2052 pol->sadb_x_policy_id = xp->index;
2053 pol->sadb_x_policy_priority = xp->priority;
2055 for (i=0; i<xp->xfrm_nr; i++) {
2056 struct sadb_x_ipsecrequest *rq;
2057 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2061 req_size = sizeof(struct sadb_x_ipsecrequest);
2062 if (t->mode == XFRM_MODE_TUNNEL)
2063 req_size += ((t->encap_family == AF_INET ?
2064 sizeof(struct sockaddr_in) :
2065 sizeof(struct sockaddr_in6)) * 2);
2068 rq = (void*)skb_put(skb, req_size);
2069 pol->sadb_x_policy_len += req_size/8;
2070 memset(rq, 0, sizeof(*rq));
2071 rq->sadb_x_ipsecrequest_len = req_size;
2072 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2073 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2075 rq->sadb_x_ipsecrequest_mode = mode;
2076 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2078 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2080 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2081 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2082 if (t->mode == XFRM_MODE_TUNNEL) {
2083 switch (t->encap_family) {
2085 sin = (void*)(rq+1);
2086 sin->sin_family = AF_INET;
2087 sin->sin_addr.s_addr = t->saddr.a4;
2089 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2091 sin->sin_family = AF_INET;
2092 sin->sin_addr.s_addr = t->id.daddr.a4;
2094 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2096 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2098 sin6 = (void*)(rq+1);
2099 sin6->sin6_family = AF_INET6;
2100 sin6->sin6_port = 0;
2101 sin6->sin6_flowinfo = 0;
2102 memcpy(&sin6->sin6_addr, t->saddr.a6,
2103 sizeof(struct in6_addr));
2104 sin6->sin6_scope_id = 0;
2107 sin6->sin6_family = AF_INET6;
2108 sin6->sin6_port = 0;
2109 sin6->sin6_flowinfo = 0;
2110 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2111 sizeof(struct in6_addr));
2112 sin6->sin6_scope_id = 0;
2121 /* security context */
2122 if ((xfrm_ctx = xp->security)) {
2123 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2125 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2126 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2127 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2128 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2129 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2130 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2131 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2135 hdr->sadb_msg_len = size / sizeof(uint64_t);
2136 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2141 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2143 struct sk_buff *out_skb;
2144 struct sadb_msg *out_hdr;
2147 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2148 if (IS_ERR(out_skb)) {
2149 err = PTR_ERR(out_skb);
2152 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2156 out_hdr = (struct sadb_msg *) out_skb->data;
2157 out_hdr->sadb_msg_version = PF_KEY_V2;
2159 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2160 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2162 out_hdr->sadb_msg_type = event2poltype(c->event);
2163 out_hdr->sadb_msg_errno = 0;
2164 out_hdr->sadb_msg_seq = c->seq;
2165 out_hdr->sadb_msg_pid = c->pid;
2166 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2172 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2175 struct sadb_lifetime *lifetime;
2176 struct sadb_address *sa;
2177 struct sadb_x_policy *pol;
2178 struct xfrm_policy *xp;
2180 struct sadb_x_sec_ctx *sec_ctx;
2182 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2183 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2184 !ext_hdrs[SADB_X_EXT_POLICY-1])
2187 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2188 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2190 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2193 xp = xfrm_policy_alloc(GFP_KERNEL);
2197 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2198 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2199 xp->priority = pol->sadb_x_policy_priority;
2201 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2202 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2207 xp->selector.family = xp->family;
2208 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2209 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2210 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2211 if (xp->selector.sport)
2212 xp->selector.sport_mask = htons(0xffff);
2214 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2215 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2216 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2218 /* Amusing, we set this twice. KAME apps appear to set same value
2219 * in both addresses.
2221 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2223 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2224 if (xp->selector.dport)
2225 xp->selector.dport_mask = htons(0xffff);
2227 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2228 if (sec_ctx != NULL) {
2229 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2236 err = security_xfrm_policy_alloc(xp, uctx);
2243 xp->lft.soft_byte_limit = XFRM_INF;
2244 xp->lft.hard_byte_limit = XFRM_INF;
2245 xp->lft.soft_packet_limit = XFRM_INF;
2246 xp->lft.hard_packet_limit = XFRM_INF;
2247 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2248 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2249 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2250 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2251 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2253 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2254 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2255 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2256 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2257 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2260 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2261 (err = parse_ipsecrequests(xp, pol)) < 0)
2264 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2265 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2267 xfrm_audit_policy_add(xp, err ? 0 : 1,
2268 audit_get_loginuid(current->audit_context), 0);
2273 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2274 c.event = XFRM_MSG_UPDPOLICY;
2276 c.event = XFRM_MSG_NEWPOLICY;
2278 c.seq = hdr->sadb_msg_seq;
2279 c.pid = hdr->sadb_msg_pid;
2281 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2286 security_xfrm_policy_free(xp);
2291 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2294 struct sadb_address *sa;
2295 struct sadb_x_policy *pol;
2296 struct xfrm_policy *xp, tmp;
2297 struct xfrm_selector sel;
2299 struct sadb_x_sec_ctx *sec_ctx;
2301 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2302 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2303 !ext_hdrs[SADB_X_EXT_POLICY-1])
2306 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2307 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2310 memset(&sel, 0, sizeof(sel));
2312 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2313 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2314 sel.prefixlen_s = sa->sadb_address_prefixlen;
2315 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2316 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2318 sel.sport_mask = htons(0xffff);
2320 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2321 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2322 sel.prefixlen_d = sa->sadb_address_prefixlen;
2323 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2324 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2326 sel.dport_mask = htons(0xffff);
2328 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2329 memset(&tmp, 0, sizeof(struct xfrm_policy));
2331 if (sec_ctx != NULL) {
2332 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2337 err = security_xfrm_policy_alloc(&tmp, uctx);
2344 xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
2345 &sel, tmp.security, 1, &err);
2346 security_xfrm_policy_free(&tmp);
2351 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2352 audit_get_loginuid(current->audit_context), 0);
2357 c.seq = hdr->sadb_msg_seq;
2358 c.pid = hdr->sadb_msg_pid;
2359 c.event = XFRM_MSG_DELPOLICY;
2360 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2367 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2370 struct sk_buff *out_skb;
2371 struct sadb_msg *out_hdr;
2374 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2375 if (IS_ERR(out_skb)) {
2376 err = PTR_ERR(out_skb);
2379 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2383 out_hdr = (struct sadb_msg *) out_skb->data;
2384 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2385 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2386 out_hdr->sadb_msg_satype = 0;
2387 out_hdr->sadb_msg_errno = 0;
2388 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2389 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2390 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2397 #ifdef CONFIG_NET_KEY_MIGRATE
2398 static int pfkey_sockaddr_pair_size(sa_family_t family)
2402 return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2403 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2405 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2413 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2414 xfrm_address_t *saddr, xfrm_address_t *daddr,
2417 struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2418 if (rq->sadb_x_ipsecrequest_len <
2419 pfkey_sockaddr_pair_size(sa->sa_family))
2422 switch (sa->sa_family) {
2425 struct sockaddr_in *sin;
2426 sin = (struct sockaddr_in *)sa;
2427 if ((sin+1)->sin_family != AF_INET)
2429 memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2431 memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2435 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2438 struct sockaddr_in6 *sin6;
2439 sin6 = (struct sockaddr_in6 *)sa;
2440 if ((sin6+1)->sin6_family != AF_INET6)
2442 memcpy(&saddr->a6, &sin6->sin6_addr,
2445 memcpy(&daddr->a6, &sin6->sin6_addr,
2458 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2459 struct xfrm_migrate *m)
2462 struct sadb_x_ipsecrequest *rq2;
2465 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2466 len < rq1->sadb_x_ipsecrequest_len)
2470 err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2475 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2476 len -= rq1->sadb_x_ipsecrequest_len;
2478 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2479 len < rq2->sadb_x_ipsecrequest_len)
2483 err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2488 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2489 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2490 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2493 m->proto = rq1->sadb_x_ipsecrequest_proto;
2494 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2497 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2499 return ((int)(rq1->sadb_x_ipsecrequest_len +
2500 rq2->sadb_x_ipsecrequest_len));
2503 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2504 struct sadb_msg *hdr, void **ext_hdrs)
2506 int i, len, ret, err = -EINVAL;
2508 struct sadb_address *sa;
2509 struct sadb_x_policy *pol;
2510 struct sadb_x_ipsecrequest *rq;
2511 struct xfrm_selector sel;
2512 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2514 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2515 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2516 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2521 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2527 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2532 dir = pol->sadb_x_policy_dir - 1;
2533 memset(&sel, 0, sizeof(sel));
2535 /* set source address info of selector */
2536 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2537 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2538 sel.prefixlen_s = sa->sadb_address_prefixlen;
2539 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2540 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2542 sel.sport_mask = htons(0xffff);
2544 /* set destination address info of selector */
2545 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2546 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2547 sel.prefixlen_d = sa->sadb_address_prefixlen;
2548 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2549 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2551 sel.dport_mask = htons(0xffff);
2553 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2555 /* extract ipsecrequests */
2557 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2559 while (len > 0 && i < XFRM_MAX_DEPTH) {
2560 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2565 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2571 if (!i || len > 0) {
2576 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2582 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2583 struct sadb_msg *hdr, void **ext_hdrs)
2585 return -ENOPROTOOPT;
2590 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2593 int err = 0, delete;
2594 struct sadb_x_policy *pol;
2595 struct xfrm_policy *xp;
2598 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2601 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2602 if (dir >= XFRM_POLICY_MAX)
2605 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2606 xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2612 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2613 audit_get_loginuid(current->audit_context), 0);
2617 c.seq = hdr->sadb_msg_seq;
2618 c.pid = hdr->sadb_msg_pid;
2620 c.event = XFRM_MSG_DELPOLICY;
2621 km_policy_notify(xp, dir, &c);
2623 err = key_pol_get_resp(sk, xp, hdr, dir);
2631 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2633 struct pfkey_dump_data *data = ptr;
2634 struct sk_buff *out_skb;
2635 struct sadb_msg *out_hdr;
2638 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2639 if (IS_ERR(out_skb))
2640 return PTR_ERR(out_skb);
2642 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2646 out_hdr = (struct sadb_msg *) out_skb->data;
2647 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2648 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2649 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2650 out_hdr->sadb_msg_errno = 0;
2651 out_hdr->sadb_msg_seq = count;
2652 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2653 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2657 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2659 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2661 return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data);
2664 static int key_notify_policy_flush(struct km_event *c)
2666 struct sk_buff *skb_out;
2667 struct sadb_msg *hdr;
2669 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2672 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2673 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2674 hdr->sadb_msg_seq = c->seq;
2675 hdr->sadb_msg_pid = c->pid;
2676 hdr->sadb_msg_version = PF_KEY_V2;
2677 hdr->sadb_msg_errno = (uint8_t) 0;
2678 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2679 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2684 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2687 struct xfrm_audit audit_info;
2690 audit_info.loginuid = audit_get_loginuid(current->audit_context);
2691 audit_info.secid = 0;
2692 err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2695 c.data.type = XFRM_POLICY_TYPE_MAIN;
2696 c.event = XFRM_MSG_FLUSHPOLICY;
2697 c.pid = hdr->sadb_msg_pid;
2698 c.seq = hdr->sadb_msg_seq;
2699 km_policy_notify(NULL, 0, &c);
2704 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2705 struct sadb_msg *hdr, void **ext_hdrs);
2706 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2707 [SADB_RESERVED] = pfkey_reserved,
2708 [SADB_GETSPI] = pfkey_getspi,
2709 [SADB_UPDATE] = pfkey_add,
2710 [SADB_ADD] = pfkey_add,
2711 [SADB_DELETE] = pfkey_delete,
2712 [SADB_GET] = pfkey_get,
2713 [SADB_ACQUIRE] = pfkey_acquire,
2714 [SADB_REGISTER] = pfkey_register,
2715 [SADB_EXPIRE] = NULL,
2716 [SADB_FLUSH] = pfkey_flush,
2717 [SADB_DUMP] = pfkey_dump,
2718 [SADB_X_PROMISC] = pfkey_promisc,
2719 [SADB_X_PCHANGE] = NULL,
2720 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2721 [SADB_X_SPDADD] = pfkey_spdadd,
2722 [SADB_X_SPDDELETE] = pfkey_spddelete,
2723 [SADB_X_SPDGET] = pfkey_spdget,
2724 [SADB_X_SPDACQUIRE] = NULL,
2725 [SADB_X_SPDDUMP] = pfkey_spddump,
2726 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2727 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2728 [SADB_X_SPDDELETE2] = pfkey_spdget,
2729 [SADB_X_MIGRATE] = pfkey_migrate,
2732 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2734 void *ext_hdrs[SADB_EXT_MAX];
2737 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2738 BROADCAST_PROMISC_ONLY, NULL);
2740 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2741 err = parse_exthdrs(skb, hdr, ext_hdrs);
2744 if (pfkey_funcs[hdr->sadb_msg_type])
2745 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2750 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2752 struct sadb_msg *hdr = NULL;
2754 if (skb->len < sizeof(*hdr)) {
2757 hdr = (struct sadb_msg *) skb->data;
2758 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2759 hdr->sadb_msg_reserved != 0 ||
2760 (hdr->sadb_msg_type <= SADB_RESERVED ||
2761 hdr->sadb_msg_type > SADB_MAX)) {
2764 } else if (hdr->sadb_msg_len != (skb->len /
2765 sizeof(uint64_t)) ||
2766 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2767 sizeof(uint64_t))) {
2777 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2779 return t->aalgos & (1 << d->desc.sadb_alg_id);
2782 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2784 return t->ealgos & (1 << d->desc.sadb_alg_id);
2787 static int count_ah_combs(struct xfrm_tmpl *t)
2791 for (i = 0; ; i++) {
2792 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2795 if (aalg_tmpl_set(t, aalg) && aalg->available)
2796 sz += sizeof(struct sadb_comb);
2798 return sz + sizeof(struct sadb_prop);
2801 static int count_esp_combs(struct xfrm_tmpl *t)
2805 for (i = 0; ; i++) {
2806 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2810 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2813 for (k = 1; ; k++) {
2814 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2818 if (aalg_tmpl_set(t, aalg) && aalg->available)
2819 sz += sizeof(struct sadb_comb);
2822 return sz + sizeof(struct sadb_prop);
2825 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2827 struct sadb_prop *p;
2830 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2831 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2832 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2833 p->sadb_prop_replay = 32;
2834 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2836 for (i = 0; ; i++) {
2837 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2841 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2842 struct sadb_comb *c;
2843 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2844 memset(c, 0, sizeof(*c));
2845 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2846 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2847 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2848 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2849 c->sadb_comb_hard_addtime = 24*60*60;
2850 c->sadb_comb_soft_addtime = 20*60*60;
2851 c->sadb_comb_hard_usetime = 8*60*60;
2852 c->sadb_comb_soft_usetime = 7*60*60;
2857 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2859 struct sadb_prop *p;
2862 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2863 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2864 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2865 p->sadb_prop_replay = 32;
2866 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2869 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2873 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2876 for (k = 1; ; k++) {
2877 struct sadb_comb *c;
2878 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2881 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2883 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2884 memset(c, 0, sizeof(*c));
2885 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2886 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2887 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2888 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2889 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2890 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2891 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2892 c->sadb_comb_hard_addtime = 24*60*60;
2893 c->sadb_comb_soft_addtime = 20*60*60;
2894 c->sadb_comb_hard_usetime = 8*60*60;
2895 c->sadb_comb_soft_usetime = 7*60*60;
2900 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2905 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2907 struct sk_buff *out_skb;
2908 struct sadb_msg *out_hdr;
2912 hard = c->data.hard;
2918 out_skb = pfkey_xfrm_state2msg(x, 0, hsc);
2919 if (IS_ERR(out_skb))
2920 return PTR_ERR(out_skb);
2922 out_hdr = (struct sadb_msg *) out_skb->data;
2923 out_hdr->sadb_msg_version = PF_KEY_V2;
2924 out_hdr->sadb_msg_type = SADB_EXPIRE;
2925 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2926 out_hdr->sadb_msg_errno = 0;
2927 out_hdr->sadb_msg_reserved = 0;
2928 out_hdr->sadb_msg_seq = 0;
2929 out_hdr->sadb_msg_pid = 0;
2931 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2935 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2938 case XFRM_MSG_EXPIRE:
2939 return key_notify_sa_expire(x, c);
2940 case XFRM_MSG_DELSA:
2941 case XFRM_MSG_NEWSA:
2942 case XFRM_MSG_UPDSA:
2943 return key_notify_sa(x, c);
2944 case XFRM_MSG_FLUSHSA:
2945 return key_notify_sa_flush(c);
2946 case XFRM_MSG_NEWAE: /* not yet supported */
2949 printk("pfkey: Unknown SA event %d\n", c->event);
2956 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2958 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2962 case XFRM_MSG_POLEXPIRE:
2963 return key_notify_policy_expire(xp, c);
2964 case XFRM_MSG_DELPOLICY:
2965 case XFRM_MSG_NEWPOLICY:
2966 case XFRM_MSG_UPDPOLICY:
2967 return key_notify_policy(xp, dir, c);
2968 case XFRM_MSG_FLUSHPOLICY:
2969 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2971 return key_notify_policy_flush(c);
2973 printk("pfkey: Unknown policy event %d\n", c->event);
2980 static u32 get_acqseq(void)
2984 static DEFINE_SPINLOCK(acqseq_lock);
2986 spin_lock_bh(&acqseq_lock);
2987 res = (++acqseq ? : ++acqseq);
2988 spin_unlock_bh(&acqseq_lock);
2992 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
2994 struct sk_buff *skb;
2995 struct sadb_msg *hdr;
2996 struct sadb_address *addr;
2997 struct sadb_x_policy *pol;
2998 struct sockaddr_in *sin;
2999 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3000 struct sockaddr_in6 *sin6;
3004 struct sadb_x_sec_ctx *sec_ctx;
3005 struct xfrm_sec_ctx *xfrm_ctx;
3008 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3012 size = sizeof(struct sadb_msg) +
3013 (sizeof(struct sadb_address) * 2) +
3014 (sockaddr_size * 2) +
3015 sizeof(struct sadb_x_policy);
3017 if (x->id.proto == IPPROTO_AH)
3018 size += count_ah_combs(t);
3019 else if (x->id.proto == IPPROTO_ESP)
3020 size += count_esp_combs(t);
3022 if ((xfrm_ctx = x->security)) {
3023 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3024 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3027 skb = alloc_skb(size + 16, GFP_ATOMIC);
3031 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3032 hdr->sadb_msg_version = PF_KEY_V2;
3033 hdr->sadb_msg_type = SADB_ACQUIRE;
3034 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3035 hdr->sadb_msg_len = size / sizeof(uint64_t);
3036 hdr->sadb_msg_errno = 0;
3037 hdr->sadb_msg_reserved = 0;
3038 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3039 hdr->sadb_msg_pid = 0;
3042 addr = (struct sadb_address*) skb_put(skb,
3043 sizeof(struct sadb_address)+sockaddr_size);
3044 addr->sadb_address_len =
3045 (sizeof(struct sadb_address)+sockaddr_size)/
3047 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3048 addr->sadb_address_proto = 0;
3049 addr->sadb_address_reserved = 0;
3050 if (x->props.family == AF_INET) {
3051 addr->sadb_address_prefixlen = 32;
3053 sin = (struct sockaddr_in *) (addr + 1);
3054 sin->sin_family = AF_INET;
3055 sin->sin_addr.s_addr = x->props.saddr.a4;
3057 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3059 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3060 else if (x->props.family == AF_INET6) {
3061 addr->sadb_address_prefixlen = 128;
3063 sin6 = (struct sockaddr_in6 *) (addr + 1);
3064 sin6->sin6_family = AF_INET6;
3065 sin6->sin6_port = 0;
3066 sin6->sin6_flowinfo = 0;
3067 memcpy(&sin6->sin6_addr,
3068 x->props.saddr.a6, sizeof(struct in6_addr));
3069 sin6->sin6_scope_id = 0;
3076 addr = (struct sadb_address*) skb_put(skb,
3077 sizeof(struct sadb_address)+sockaddr_size);
3078 addr->sadb_address_len =
3079 (sizeof(struct sadb_address)+sockaddr_size)/
3081 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3082 addr->sadb_address_proto = 0;
3083 addr->sadb_address_reserved = 0;
3084 if (x->props.family == AF_INET) {
3085 addr->sadb_address_prefixlen = 32;
3087 sin = (struct sockaddr_in *) (addr + 1);
3088 sin->sin_family = AF_INET;
3089 sin->sin_addr.s_addr = x->id.daddr.a4;
3091 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3093 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3094 else if (x->props.family == AF_INET6) {
3095 addr->sadb_address_prefixlen = 128;
3097 sin6 = (struct sockaddr_in6 *) (addr + 1);
3098 sin6->sin6_family = AF_INET6;
3099 sin6->sin6_port = 0;
3100 sin6->sin6_flowinfo = 0;
3101 memcpy(&sin6->sin6_addr,
3102 x->id.daddr.a6, sizeof(struct in6_addr));
3103 sin6->sin6_scope_id = 0;
3109 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3110 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3111 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3112 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3113 pol->sadb_x_policy_dir = dir+1;
3114 pol->sadb_x_policy_id = xp->index;
3116 /* Set sadb_comb's. */
3117 if (x->id.proto == IPPROTO_AH)
3118 dump_ah_combs(skb, t);
3119 else if (x->id.proto == IPPROTO_ESP)
3120 dump_esp_combs(skb, t);
3122 /* security context */
3124 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3125 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3126 sec_ctx->sadb_x_sec_len =
3127 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3128 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3129 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3130 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3131 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3132 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3136 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3139 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3140 u8 *data, int len, int *dir)
3142 struct xfrm_policy *xp;
3143 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3144 struct sadb_x_sec_ctx *sec_ctx;
3146 switch (sk->sk_family) {
3148 if (opt != IP_IPSEC_POLICY) {
3153 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3155 if (opt != IPV6_IPSEC_POLICY) {
3168 if (len < sizeof(struct sadb_x_policy) ||
3169 pol->sadb_x_policy_len*8 > len ||
3170 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3171 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3174 xp = xfrm_policy_alloc(GFP_ATOMIC);
3180 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3181 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3183 xp->lft.soft_byte_limit = XFRM_INF;
3184 xp->lft.hard_byte_limit = XFRM_INF;
3185 xp->lft.soft_packet_limit = XFRM_INF;
3186 xp->lft.hard_packet_limit = XFRM_INF;
3187 xp->family = sk->sk_family;
3190 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3191 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3194 /* security context too */
3195 if (len >= (pol->sadb_x_policy_len*8 +
3196 sizeof(struct sadb_x_sec_ctx))) {
3197 char *p = (char *)pol;
3198 struct xfrm_user_sec_ctx *uctx;
3200 p += pol->sadb_x_policy_len*8;
3201 sec_ctx = (struct sadb_x_sec_ctx *)p;
3202 if (len < pol->sadb_x_policy_len*8 +
3203 sec_ctx->sadb_x_sec_len) {
3207 if ((*dir = verify_sec_ctx_len(p)))
3209 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3210 *dir = security_xfrm_policy_alloc(xp, uctx);
3217 *dir = pol->sadb_x_policy_dir-1;
3221 security_xfrm_policy_free(xp);
3226 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3228 struct sk_buff *skb;
3229 struct sadb_msg *hdr;
3231 struct sadb_address *addr;
3232 struct sadb_x_nat_t_port *n_port;
3233 struct sockaddr_in *sin;
3234 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3235 struct sockaddr_in6 *sin6;
3239 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3240 struct xfrm_encap_tmpl *natt = NULL;
3242 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3254 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3256 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3257 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3260 size = sizeof(struct sadb_msg) +
3261 sizeof(struct sadb_sa) +
3262 (sizeof(struct sadb_address) * 2) +
3263 (sockaddr_size * 2) +
3264 (sizeof(struct sadb_x_nat_t_port) * 2);
3266 skb = alloc_skb(size + 16, GFP_ATOMIC);
3270 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3271 hdr->sadb_msg_version = PF_KEY_V2;
3272 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3273 hdr->sadb_msg_satype = satype;
3274 hdr->sadb_msg_len = size / sizeof(uint64_t);
3275 hdr->sadb_msg_errno = 0;
3276 hdr->sadb_msg_reserved = 0;
3277 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3278 hdr->sadb_msg_pid = 0;
3281 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3282 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3283 sa->sadb_sa_exttype = SADB_EXT_SA;
3284 sa->sadb_sa_spi = x->id.spi;
3285 sa->sadb_sa_replay = 0;
3286 sa->sadb_sa_state = 0;
3287 sa->sadb_sa_auth = 0;
3288 sa->sadb_sa_encrypt = 0;
3289 sa->sadb_sa_flags = 0;
3291 /* ADDRESS_SRC (old addr) */
3292 addr = (struct sadb_address*)
3293 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3294 addr->sadb_address_len =
3295 (sizeof(struct sadb_address)+sockaddr_size)/
3297 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3298 addr->sadb_address_proto = 0;
3299 addr->sadb_address_reserved = 0;
3300 if (x->props.family == AF_INET) {
3301 addr->sadb_address_prefixlen = 32;
3303 sin = (struct sockaddr_in *) (addr + 1);
3304 sin->sin_family = AF_INET;
3305 sin->sin_addr.s_addr = x->props.saddr.a4;
3307 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3309 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3310 else if (x->props.family == AF_INET6) {
3311 addr->sadb_address_prefixlen = 128;
3313 sin6 = (struct sockaddr_in6 *) (addr + 1);
3314 sin6->sin6_family = AF_INET6;
3315 sin6->sin6_port = 0;
3316 sin6->sin6_flowinfo = 0;
3317 memcpy(&sin6->sin6_addr,
3318 x->props.saddr.a6, sizeof(struct in6_addr));
3319 sin6->sin6_scope_id = 0;
3325 /* NAT_T_SPORT (old port) */
3326 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3327 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3328 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3329 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3330 n_port->sadb_x_nat_t_port_reserved = 0;
3332 /* ADDRESS_DST (new addr) */
3333 addr = (struct sadb_address*)
3334 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3335 addr->sadb_address_len =
3336 (sizeof(struct sadb_address)+sockaddr_size)/
3338 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3339 addr->sadb_address_proto = 0;
3340 addr->sadb_address_reserved = 0;
3341 if (x->props.family == AF_INET) {
3342 addr->sadb_address_prefixlen = 32;
3344 sin = (struct sockaddr_in *) (addr + 1);
3345 sin->sin_family = AF_INET;
3346 sin->sin_addr.s_addr = ipaddr->a4;
3348 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3350 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3351 else if (x->props.family == AF_INET6) {
3352 addr->sadb_address_prefixlen = 128;
3354 sin6 = (struct sockaddr_in6 *) (addr + 1);
3355 sin6->sin6_family = AF_INET6;
3356 sin6->sin6_port = 0;
3357 sin6->sin6_flowinfo = 0;
3358 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3359 sin6->sin6_scope_id = 0;
3365 /* NAT_T_DPORT (new port) */
3366 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3367 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3368 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3369 n_port->sadb_x_nat_t_port_port = sport;
3370 n_port->sadb_x_nat_t_port_reserved = 0;
3372 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3375 #ifdef CONFIG_NET_KEY_MIGRATE
3376 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3377 struct xfrm_selector *sel)
3379 struct sadb_address *addr;
3380 struct sockaddr_in *sin;
3381 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3382 struct sockaddr_in6 *sin6;
3384 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3385 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3386 addr->sadb_address_exttype = type;
3387 addr->sadb_address_proto = sel->proto;
3388 addr->sadb_address_reserved = 0;
3391 case SADB_EXT_ADDRESS_SRC:
3392 if (sel->family == AF_INET) {
3393 addr->sadb_address_prefixlen = sel->prefixlen_s;
3394 sin = (struct sockaddr_in *)(addr + 1);
3395 sin->sin_family = AF_INET;
3396 memcpy(&sin->sin_addr.s_addr, &sel->saddr,
3397 sizeof(sin->sin_addr.s_addr));
3399 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3401 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3402 else if (sel->family == AF_INET6) {
3403 addr->sadb_address_prefixlen = sel->prefixlen_s;
3404 sin6 = (struct sockaddr_in6 *)(addr + 1);
3405 sin6->sin6_family = AF_INET6;
3406 sin6->sin6_port = 0;
3407 sin6->sin6_flowinfo = 0;
3408 sin6->sin6_scope_id = 0;
3409 memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr,
3410 sizeof(sin6->sin6_addr.s6_addr));
3414 case SADB_EXT_ADDRESS_DST:
3415 if (sel->family == AF_INET) {
3416 addr->sadb_address_prefixlen = sel->prefixlen_d;
3417 sin = (struct sockaddr_in *)(addr + 1);
3418 sin->sin_family = AF_INET;
3419 memcpy(&sin->sin_addr.s_addr, &sel->daddr,
3420 sizeof(sin->sin_addr.s_addr));
3422 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3424 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3425 else if (sel->family == AF_INET6) {
3426 addr->sadb_address_prefixlen = sel->prefixlen_d;
3427 sin6 = (struct sockaddr_in6 *)(addr + 1);
3428 sin6->sin6_family = AF_INET6;
3429 sin6->sin6_port = 0;
3430 sin6->sin6_flowinfo = 0;
3431 sin6->sin6_scope_id = 0;
3432 memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr,
3433 sizeof(sin6->sin6_addr.s6_addr));
3444 static int set_ipsecrequest(struct sk_buff *skb,
3445 uint8_t proto, uint8_t mode, int level,
3446 uint32_t reqid, uint8_t family,
3447 xfrm_address_t *src, xfrm_address_t *dst)
3449 struct sadb_x_ipsecrequest *rq;
3450 struct sockaddr_in *sin;
3451 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3452 struct sockaddr_in6 *sin6;
3456 size_req = sizeof(struct sadb_x_ipsecrequest) +
3457 pfkey_sockaddr_pair_size(family);
3459 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3460 memset(rq, 0, size_req);
3461 rq->sadb_x_ipsecrequest_len = size_req;
3462 rq->sadb_x_ipsecrequest_proto = proto;
3463 rq->sadb_x_ipsecrequest_mode = mode;
3464 rq->sadb_x_ipsecrequest_level = level;
3465 rq->sadb_x_ipsecrequest_reqid = reqid;
3469 sin = (struct sockaddr_in *)(rq + 1);
3470 sin->sin_family = AF_INET;
3471 memcpy(&sin->sin_addr.s_addr, src,
3472 sizeof(sin->sin_addr.s_addr));
3474 sin->sin_family = AF_INET;
3475 memcpy(&sin->sin_addr.s_addr, dst,
3476 sizeof(sin->sin_addr.s_addr));
3478 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3480 sin6 = (struct sockaddr_in6 *)(rq + 1);
3481 sin6->sin6_family = AF_INET6;
3482 sin6->sin6_port = 0;
3483 sin6->sin6_flowinfo = 0;
3484 sin6->sin6_scope_id = 0;
3485 memcpy(&sin6->sin6_addr.s6_addr, src,
3486 sizeof(sin6->sin6_addr.s6_addr));
3488 sin6->sin6_family = AF_INET6;
3489 sin6->sin6_port = 0;
3490 sin6->sin6_flowinfo = 0;
3491 sin6->sin6_scope_id = 0;
3492 memcpy(&sin6->sin6_addr.s6_addr, dst,
3493 sizeof(sin6->sin6_addr.s6_addr));
3504 #ifdef CONFIG_NET_KEY_MIGRATE
3505 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3506 struct xfrm_migrate *m, int num_bundles)
3512 struct sk_buff *skb;
3513 struct sadb_msg *hdr;
3514 struct sadb_x_policy *pol;
3515 struct xfrm_migrate *mp;
3517 if (type != XFRM_POLICY_TYPE_MAIN)
3520 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3524 sasize_sel = pfkey_sockaddr_size(sel->family);
3527 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3530 size_pol += sizeof(struct sadb_x_policy);
3533 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3534 /* old locator pair */
3535 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3536 pfkey_sockaddr_pair_size(mp->old_family);
3537 /* new locator pair */
3538 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3539 pfkey_sockaddr_pair_size(mp->new_family);
3542 size += sizeof(struct sadb_msg) + size_pol;
3545 skb = alloc_skb(size, GFP_ATOMIC);
3549 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3550 hdr->sadb_msg_version = PF_KEY_V2;
3551 hdr->sadb_msg_type = SADB_X_MIGRATE;
3552 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3553 hdr->sadb_msg_len = size / 8;
3554 hdr->sadb_msg_errno = 0;
3555 hdr->sadb_msg_reserved = 0;
3556 hdr->sadb_msg_seq = 0;
3557 hdr->sadb_msg_pid = 0;
3560 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3563 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3565 /* policy information */
3566 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3567 pol->sadb_x_policy_len = size_pol / 8;
3568 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3569 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3570 pol->sadb_x_policy_dir = dir + 1;
3571 pol->sadb_x_policy_id = 0;
3572 pol->sadb_x_policy_priority = 0;
3574 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3575 /* old ipsecrequest */
3576 int mode = pfkey_mode_from_xfrm(mp->mode);
3579 if (set_ipsecrequest(skb, mp->proto, mode,
3580 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3581 mp->reqid, mp->old_family,
3582 &mp->old_saddr, &mp->old_daddr) < 0) {
3586 /* new ipsecrequest */
3587 if (set_ipsecrequest(skb, mp->proto, mode,
3588 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3589 mp->reqid, mp->new_family,
3590 &mp->new_saddr, &mp->new_daddr) < 0) {
3595 /* broadcast migrate message to sockets */
3596 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3601 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3602 struct xfrm_migrate *m, int num_bundles)
3604 return -ENOPROTOOPT;
3608 static int pfkey_sendmsg(struct kiocb *kiocb,
3609 struct socket *sock, struct msghdr *msg, size_t len)
3611 struct sock *sk = sock->sk;
3612 struct sk_buff *skb = NULL;
3613 struct sadb_msg *hdr = NULL;
3617 if (msg->msg_flags & MSG_OOB)
3621 if ((unsigned)len > sk->sk_sndbuf - 32)
3625 skb = alloc_skb(len, GFP_KERNEL);
3630 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3633 hdr = pfkey_get_base_msg(skb, &err);
3637 mutex_lock(&xfrm_cfg_mutex);
3638 err = pfkey_process(sk, skb, hdr);
3639 mutex_unlock(&xfrm_cfg_mutex);
3642 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3650 static int pfkey_recvmsg(struct kiocb *kiocb,
3651 struct socket *sock, struct msghdr *msg, size_t len,
3654 struct sock *sk = sock->sk;
3655 struct sk_buff *skb;
3659 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3662 msg->msg_namelen = 0;
3663 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3669 msg->msg_flags |= MSG_TRUNC;
3673 skb_reset_transport_header(skb);
3674 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3678 sock_recv_timestamp(msg, sk, skb);
3680 err = (flags & MSG_TRUNC) ? skb->len : copied;
3683 skb_free_datagram(sk, skb);
3688 static const struct proto_ops pfkey_ops = {
3690 .owner = THIS_MODULE,
3691 /* Operations that make no sense on pfkey sockets. */
3692 .bind = sock_no_bind,
3693 .connect = sock_no_connect,
3694 .socketpair = sock_no_socketpair,
3695 .accept = sock_no_accept,
3696 .getname = sock_no_getname,
3697 .ioctl = sock_no_ioctl,
3698 .listen = sock_no_listen,
3699 .shutdown = sock_no_shutdown,
3700 .setsockopt = sock_no_setsockopt,
3701 .getsockopt = sock_no_getsockopt,
3702 .mmap = sock_no_mmap,
3703 .sendpage = sock_no_sendpage,
3705 /* Now the operations that really occur. */
3706 .release = pfkey_release,
3707 .poll = datagram_poll,
3708 .sendmsg = pfkey_sendmsg,
3709 .recvmsg = pfkey_recvmsg,
3712 static struct net_proto_family pfkey_family_ops = {
3714 .create = pfkey_create,
3715 .owner = THIS_MODULE,
3718 #ifdef CONFIG_PROC_FS
3719 static int pfkey_read_proc(char *buffer, char **start, off_t offset,
3720 int length, int *eof, void *data)
3726 struct hlist_node *node;
3728 len += sprintf(buffer,"sk RefCnt Rmem Wmem User Inode\n");
3730 read_lock(&pfkey_table_lock);
3732 sk_for_each(s, node, &pfkey_table) {
3733 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
3735 atomic_read(&s->sk_refcnt),
3736 atomic_read(&s->sk_rmem_alloc),
3737 atomic_read(&s->sk_wmem_alloc),
3742 buffer[len++] = '\n';
3749 if(pos > offset + length)
3755 read_unlock(&pfkey_table_lock);
3757 *start = buffer + (offset - begin);
3758 len -= (offset - begin);
3769 static struct xfrm_mgr pfkeyv2_mgr =
3772 .notify = pfkey_send_notify,
3773 .acquire = pfkey_send_acquire,
3774 .compile_policy = pfkey_compile_policy,
3775 .new_mapping = pfkey_send_new_mapping,
3776 .notify_policy = pfkey_send_policy_notify,
3777 .migrate = pfkey_send_migrate,
3780 static void __exit ipsec_pfkey_exit(void)
3782 xfrm_unregister_km(&pfkeyv2_mgr);
3783 remove_proc_entry("pfkey", init_net.proc_net);
3784 sock_unregister(PF_KEY);
3785 proto_unregister(&key_proto);
3788 static int __init ipsec_pfkey_init(void)
3790 int err = proto_register(&key_proto, 0);
3795 err = sock_register(&pfkey_family_ops);
3797 goto out_unregister_key_proto;
3798 #ifdef CONFIG_PROC_FS
3800 if (create_proc_read_entry("pfkey", 0, init_net.proc_net, pfkey_read_proc, NULL) == NULL)
3801 goto out_sock_unregister;
3803 err = xfrm_register_km(&pfkeyv2_mgr);
3805 goto out_remove_proc_entry;
3808 out_remove_proc_entry:
3809 #ifdef CONFIG_PROC_FS
3810 remove_proc_entry("net/pfkey", NULL);
3811 out_sock_unregister:
3813 sock_unregister(PF_KEY);
3814 out_unregister_key_proto:
3815 proto_unregister(&key_proto);
3819 module_init(ipsec_pfkey_init);
3820 module_exit(ipsec_pfkey_exit);
3821 MODULE_LICENSE("GPL");
3822 MODULE_ALIAS_NETPROTO(PF_KEY);