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 */
55 int (*dump)(struct pfkey_sock *sk);
56 void (*done)(struct pfkey_sock *sk);
58 struct xfrm_policy_walk policy;
59 struct xfrm_state_walk state;
65 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
67 return (struct pfkey_sock *)sk;
70 static int pfkey_can_dump(struct sock *sk)
72 if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
77 static void pfkey_terminate_dump(struct pfkey_sock *pfk)
81 kfree_skb(pfk->dump.skb);
85 pfk->dump.dump = NULL;
86 pfk->dump.done = NULL;
90 static void pfkey_sock_destruct(struct sock *sk)
92 pfkey_terminate_dump(pfkey_sk(sk));
93 skb_queue_purge(&sk->sk_receive_queue);
95 if (!sock_flag(sk, SOCK_DEAD)) {
96 printk("Attempt to release alive pfkey socket: %p\n", sk);
100 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
101 WARN_ON(atomic_read(&sk->sk_wmem_alloc));
103 atomic_dec(&pfkey_socks_nr);
106 static void pfkey_table_grab(void)
108 write_lock_bh(&pfkey_table_lock);
110 if (atomic_read(&pfkey_table_users)) {
111 DECLARE_WAITQUEUE(wait, current);
113 add_wait_queue_exclusive(&pfkey_table_wait, &wait);
115 set_current_state(TASK_UNINTERRUPTIBLE);
116 if (atomic_read(&pfkey_table_users) == 0)
118 write_unlock_bh(&pfkey_table_lock);
120 write_lock_bh(&pfkey_table_lock);
123 __set_current_state(TASK_RUNNING);
124 remove_wait_queue(&pfkey_table_wait, &wait);
128 static __inline__ void pfkey_table_ungrab(void)
130 write_unlock_bh(&pfkey_table_lock);
131 wake_up(&pfkey_table_wait);
134 static __inline__ void pfkey_lock_table(void)
136 /* read_lock() synchronizes us to pfkey_table_grab */
138 read_lock(&pfkey_table_lock);
139 atomic_inc(&pfkey_table_users);
140 read_unlock(&pfkey_table_lock);
143 static __inline__ void pfkey_unlock_table(void)
145 if (atomic_dec_and_test(&pfkey_table_users))
146 wake_up(&pfkey_table_wait);
150 static const struct proto_ops pfkey_ops;
152 static void pfkey_insert(struct sock *sk)
155 sk_add_node(sk, &pfkey_table);
156 pfkey_table_ungrab();
159 static void pfkey_remove(struct sock *sk)
162 sk_del_node_init(sk);
163 pfkey_table_ungrab();
166 static struct proto key_proto = {
168 .owner = THIS_MODULE,
169 .obj_size = sizeof(struct pfkey_sock),
172 static int pfkey_create(struct net *net, struct socket *sock, int protocol)
177 if (net != &init_net)
178 return -EAFNOSUPPORT;
180 if (!capable(CAP_NET_ADMIN))
182 if (sock->type != SOCK_RAW)
183 return -ESOCKTNOSUPPORT;
184 if (protocol != PF_KEY_V2)
185 return -EPROTONOSUPPORT;
188 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
192 sock->ops = &pfkey_ops;
193 sock_init_data(sock, sk);
195 sk->sk_family = PF_KEY;
196 sk->sk_destruct = pfkey_sock_destruct;
198 atomic_inc(&pfkey_socks_nr);
207 static int pfkey_release(struct socket *sock)
209 struct sock *sk = sock->sk;
218 skb_queue_purge(&sk->sk_write_queue);
224 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
225 gfp_t allocation, struct sock *sk)
231 if (atomic_read(&skb->users) != 1) {
232 *skb2 = skb_clone(skb, allocation);
235 atomic_inc(&skb->users);
239 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
241 skb_set_owner_r(*skb2, sk);
242 skb_queue_tail(&sk->sk_receive_queue, *skb2);
243 sk->sk_data_ready(sk, (*skb2)->len);
252 /* Send SKB to all pfkey sockets matching selected criteria. */
253 #define BROADCAST_ALL 0
254 #define BROADCAST_ONE 1
255 #define BROADCAST_REGISTERED 2
256 #define BROADCAST_PROMISC_ONLY 4
257 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
258 int broadcast_flags, struct sock *one_sk)
261 struct hlist_node *node;
262 struct sk_buff *skb2 = NULL;
265 /* XXX Do we need something like netlink_overrun? I think
266 * XXX PF_KEY socket apps will not mind current behavior.
272 sk_for_each(sk, node, &pfkey_table) {
273 struct pfkey_sock *pfk = pfkey_sk(sk);
276 /* Yes, it means that if you are meant to receive this
277 * pfkey message you receive it twice as promiscuous
281 pfkey_broadcast_one(skb, &skb2, allocation, sk);
283 /* the exact target will be processed later */
286 if (broadcast_flags != BROADCAST_ALL) {
287 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
289 if ((broadcast_flags & BROADCAST_REGISTERED) &&
292 if (broadcast_flags & BROADCAST_ONE)
296 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
298 /* Error is cleare after succecful sending to at least one
300 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
303 pfkey_unlock_table();
306 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
314 static int pfkey_do_dump(struct pfkey_sock *pfk)
316 struct sadb_msg *hdr;
319 rc = pfk->dump.dump(pfk);
324 if (!pfkey_can_dump(&pfk->sk))
327 hdr = (struct sadb_msg *) pfk->dump.skb->data;
328 hdr->sadb_msg_seq = 0;
329 hdr->sadb_msg_errno = rc;
330 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
332 pfk->dump.skb = NULL;
335 pfkey_terminate_dump(pfk);
339 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
344 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
346 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
347 struct sadb_msg *hdr;
352 /* Woe be to the platform trying to support PFKEY yet
353 * having normal errnos outside the 1-255 range, inclusive.
356 if (err == ERESTARTSYS ||
357 err == ERESTARTNOHAND ||
358 err == ERESTARTNOINTR)
362 BUG_ON(err <= 0 || err >= 256);
364 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
365 pfkey_hdr_dup(hdr, orig);
366 hdr->sadb_msg_errno = (uint8_t) err;
367 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
370 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
375 static u8 sadb_ext_min_len[] = {
376 [SADB_EXT_RESERVED] = (u8) 0,
377 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
378 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
379 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
380 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
381 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
382 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
383 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
384 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
385 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
386 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
387 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
388 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
389 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
390 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
391 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
392 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
393 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
394 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
395 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
396 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
397 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
398 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
399 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
400 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
403 /* Verify sadb_address_{len,prefixlen} against sa_family. */
404 static int verify_address_len(void *p)
406 struct sadb_address *sp = p;
407 struct sockaddr *addr = (struct sockaddr *)(sp + 1);
408 struct sockaddr_in *sin;
409 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
410 struct sockaddr_in6 *sin6;
414 switch (addr->sa_family) {
416 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
417 if (sp->sadb_address_len != len ||
418 sp->sadb_address_prefixlen > 32)
421 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
423 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
424 if (sp->sadb_address_len != len ||
425 sp->sadb_address_prefixlen > 128)
430 /* It is user using kernel to keep track of security
431 * associations for another protocol, such as
432 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
435 * XXX Actually, association/policy database is not yet
436 * XXX able to cope with arbitrary sockaddr families.
437 * XXX When it can, remove this -EINVAL. -DaveM
446 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
448 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
449 sec_ctx->sadb_x_ctx_len,
453 static inline int verify_sec_ctx_len(void *p)
455 struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
456 int len = sec_ctx->sadb_x_ctx_len;
461 len = pfkey_sec_ctx_len(sec_ctx);
463 if (sec_ctx->sadb_x_sec_len != len)
469 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
471 struct xfrm_user_sec_ctx *uctx = NULL;
472 int ctx_size = sec_ctx->sadb_x_ctx_len;
474 uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
479 uctx->len = pfkey_sec_ctx_len(sec_ctx);
480 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
481 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
482 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
483 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
484 memcpy(uctx + 1, sec_ctx + 1,
490 static int present_and_same_family(struct sadb_address *src,
491 struct sadb_address *dst)
493 struct sockaddr *s_addr, *d_addr;
498 s_addr = (struct sockaddr *)(src + 1);
499 d_addr = (struct sockaddr *)(dst + 1);
500 if (s_addr->sa_family != d_addr->sa_family)
502 if (s_addr->sa_family != AF_INET
503 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
504 && s_addr->sa_family != AF_INET6
512 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
514 char *p = (char *) hdr;
520 struct sadb_ext *ehdr = (struct sadb_ext *) p;
524 ext_len = ehdr->sadb_ext_len;
525 ext_len *= sizeof(uint64_t);
526 ext_type = ehdr->sadb_ext_type;
527 if (ext_len < sizeof(uint64_t) ||
529 ext_type == SADB_EXT_RESERVED)
532 if (ext_type <= SADB_EXT_MAX) {
533 int min = (int) sadb_ext_min_len[ext_type];
536 if (ext_hdrs[ext_type-1] != NULL)
538 if (ext_type == SADB_EXT_ADDRESS_SRC ||
539 ext_type == SADB_EXT_ADDRESS_DST ||
540 ext_type == SADB_EXT_ADDRESS_PROXY ||
541 ext_type == SADB_X_EXT_NAT_T_OA) {
542 if (verify_address_len(p))
545 if (ext_type == SADB_X_EXT_SEC_CTX) {
546 if (verify_sec_ctx_len(p))
549 ext_hdrs[ext_type-1] = p;
559 pfkey_satype2proto(uint8_t satype)
562 case SADB_SATYPE_UNSPEC:
563 return IPSEC_PROTO_ANY;
566 case SADB_SATYPE_ESP:
568 case SADB_X_SATYPE_IPCOMP:
578 pfkey_proto2satype(uint16_t proto)
582 return SADB_SATYPE_AH;
584 return SADB_SATYPE_ESP;
586 return SADB_X_SATYPE_IPCOMP;
594 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
595 * say specifically 'just raw sockets' as we encode them as 255.
598 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
600 return (proto == IPSEC_PROTO_ANY ? 0 : proto);
603 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
605 return (proto ? proto : IPSEC_PROTO_ANY);
608 static inline int pfkey_sockaddr_len(sa_family_t family)
612 return sizeof(struct sockaddr_in);
613 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
615 return sizeof(struct sockaddr_in6);
622 int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
624 switch (sa->sa_family) {
627 ((struct sockaddr_in *)sa)->sin_addr.s_addr;
629 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
632 &((struct sockaddr_in6 *)sa)->sin6_addr,
633 sizeof(struct in6_addr));
641 int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr, xfrm_address_t *xaddr)
643 return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
647 static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
650 struct sadb_address *addr;
652 unsigned short family;
653 xfrm_address_t *xaddr;
655 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
659 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
663 /* sadb_address_len should be checked by caller */
664 addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
668 family = ((struct sockaddr *)(addr + 1))->sa_family;
671 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
673 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
675 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
685 return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
688 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
691 pfkey_sockaddr_size(sa_family_t family)
693 return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
696 static inline int pfkey_mode_from_xfrm(int mode)
699 case XFRM_MODE_TRANSPORT:
700 return IPSEC_MODE_TRANSPORT;
701 case XFRM_MODE_TUNNEL:
702 return IPSEC_MODE_TUNNEL;
704 return IPSEC_MODE_BEET;
710 static inline int pfkey_mode_to_xfrm(int mode)
713 case IPSEC_MODE_ANY: /*XXX*/
714 case IPSEC_MODE_TRANSPORT:
715 return XFRM_MODE_TRANSPORT;
716 case IPSEC_MODE_TUNNEL:
717 return XFRM_MODE_TUNNEL;
718 case IPSEC_MODE_BEET:
719 return XFRM_MODE_BEET;
725 static unsigned int pfkey_sockaddr_fill(xfrm_address_t *xaddr, __be16 port,
727 unsigned short family)
732 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
733 sin->sin_family = AF_INET;
734 sin->sin_port = port;
735 sin->sin_addr.s_addr = xaddr->a4;
736 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
739 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
742 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
743 sin6->sin6_family = AF_INET6;
744 sin6->sin6_port = port;
745 sin6->sin6_flowinfo = 0;
746 ipv6_addr_copy(&sin6->sin6_addr, (struct in6_addr *)xaddr->a6);
747 sin6->sin6_scope_id = 0;
755 static struct sk_buff *__pfkey_xfrm_state2msg(struct xfrm_state *x,
756 int add_keys, int hsc)
759 struct sadb_msg *hdr;
761 struct sadb_lifetime *lifetime;
762 struct sadb_address *addr;
763 struct sadb_key *key;
764 struct sadb_x_sa2 *sa2;
765 struct sadb_x_sec_ctx *sec_ctx;
766 struct xfrm_sec_ctx *xfrm_ctx;
769 int auth_key_size = 0;
770 int encrypt_key_size = 0;
772 struct xfrm_encap_tmpl *natt = NULL;
775 /* address family check */
776 sockaddr_size = pfkey_sockaddr_size(x->props.family);
778 return ERR_PTR(-EINVAL);
780 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
781 key(AE), (identity(SD),) (sensitivity)> */
782 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
783 sizeof(struct sadb_lifetime) +
784 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
785 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
786 sizeof(struct sadb_address)*2 +
788 sizeof(struct sadb_x_sa2);
790 if ((xfrm_ctx = x->security)) {
791 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
792 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
795 /* identity & sensitivity */
796 if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, x->props.family))
797 size += sizeof(struct sadb_address) + sockaddr_size;
800 if (x->aalg && x->aalg->alg_key_len) {
802 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
803 size += sizeof(struct sadb_key) + auth_key_size;
805 if (x->ealg && x->ealg->alg_key_len) {
807 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
808 size += sizeof(struct sadb_key) + encrypt_key_size;
814 if (natt && natt->encap_type) {
815 size += sizeof(struct sadb_x_nat_t_type);
816 size += sizeof(struct sadb_x_nat_t_port);
817 size += sizeof(struct sadb_x_nat_t_port);
820 skb = alloc_skb(size + 16, GFP_ATOMIC);
822 return ERR_PTR(-ENOBUFS);
824 /* call should fill header later */
825 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
826 memset(hdr, 0, size); /* XXX do we need this ? */
827 hdr->sadb_msg_len = size / sizeof(uint64_t);
830 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
831 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
832 sa->sadb_sa_exttype = SADB_EXT_SA;
833 sa->sadb_sa_spi = x->id.spi;
834 sa->sadb_sa_replay = x->props.replay_window;
835 switch (x->km.state) {
836 case XFRM_STATE_VALID:
837 sa->sadb_sa_state = x->km.dying ?
838 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
841 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
844 sa->sadb_sa_state = SADB_SASTATE_DEAD;
847 sa->sadb_sa_auth = 0;
849 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
850 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
852 sa->sadb_sa_encrypt = 0;
853 BUG_ON(x->ealg && x->calg);
855 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
856 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
858 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
860 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
861 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
864 sa->sadb_sa_flags = 0;
865 if (x->props.flags & XFRM_STATE_NOECN)
866 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
867 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
868 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
869 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
870 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
874 lifetime = (struct sadb_lifetime *) skb_put(skb,
875 sizeof(struct sadb_lifetime));
876 lifetime->sadb_lifetime_len =
877 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
878 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
879 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
880 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
881 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
882 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
886 lifetime = (struct sadb_lifetime *) skb_put(skb,
887 sizeof(struct sadb_lifetime));
888 lifetime->sadb_lifetime_len =
889 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
890 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
891 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
892 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
893 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
894 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
897 lifetime = (struct sadb_lifetime *) skb_put(skb,
898 sizeof(struct sadb_lifetime));
899 lifetime->sadb_lifetime_len =
900 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
901 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
902 lifetime->sadb_lifetime_allocations = x->curlft.packets;
903 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
904 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
905 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
907 addr = (struct sadb_address*) skb_put(skb,
908 sizeof(struct sadb_address)+sockaddr_size);
909 addr->sadb_address_len =
910 (sizeof(struct sadb_address)+sockaddr_size)/
912 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
913 /* "if the ports are non-zero, then the sadb_address_proto field,
914 normally zero, MUST be filled in with the transport
915 protocol's number." - RFC2367 */
916 addr->sadb_address_proto = 0;
917 addr->sadb_address_reserved = 0;
919 addr->sadb_address_prefixlen =
920 pfkey_sockaddr_fill(&x->props.saddr, 0,
921 (struct sockaddr *) (addr + 1),
923 if (!addr->sadb_address_prefixlen)
927 addr = (struct sadb_address*) skb_put(skb,
928 sizeof(struct sadb_address)+sockaddr_size);
929 addr->sadb_address_len =
930 (sizeof(struct sadb_address)+sockaddr_size)/
932 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
933 addr->sadb_address_proto = 0;
934 addr->sadb_address_reserved = 0;
936 addr->sadb_address_prefixlen =
937 pfkey_sockaddr_fill(&x->id.daddr, 0,
938 (struct sockaddr *) (addr + 1),
940 if (!addr->sadb_address_prefixlen)
943 if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr,
945 addr = (struct sadb_address*) skb_put(skb,
946 sizeof(struct sadb_address)+sockaddr_size);
947 addr->sadb_address_len =
948 (sizeof(struct sadb_address)+sockaddr_size)/
950 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
951 addr->sadb_address_proto =
952 pfkey_proto_from_xfrm(x->sel.proto);
953 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
954 addr->sadb_address_reserved = 0;
956 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
957 (struct sockaddr *) (addr + 1),
962 if (add_keys && auth_key_size) {
963 key = (struct sadb_key *) skb_put(skb,
964 sizeof(struct sadb_key)+auth_key_size);
965 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
967 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
968 key->sadb_key_bits = x->aalg->alg_key_len;
969 key->sadb_key_reserved = 0;
970 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
973 if (add_keys && encrypt_key_size) {
974 key = (struct sadb_key *) skb_put(skb,
975 sizeof(struct sadb_key)+encrypt_key_size);
976 key->sadb_key_len = (sizeof(struct sadb_key) +
977 encrypt_key_size) / sizeof(uint64_t);
978 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
979 key->sadb_key_bits = x->ealg->alg_key_len;
980 key->sadb_key_reserved = 0;
981 memcpy(key + 1, x->ealg->alg_key,
982 (x->ealg->alg_key_len+7)/8);
986 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
987 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
988 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
989 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
991 return ERR_PTR(-EINVAL);
993 sa2->sadb_x_sa2_mode = mode;
994 sa2->sadb_x_sa2_reserved1 = 0;
995 sa2->sadb_x_sa2_reserved2 = 0;
996 sa2->sadb_x_sa2_sequence = 0;
997 sa2->sadb_x_sa2_reqid = x->props.reqid;
999 if (natt && natt->encap_type) {
1000 struct sadb_x_nat_t_type *n_type;
1001 struct sadb_x_nat_t_port *n_port;
1004 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
1005 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
1006 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
1007 n_type->sadb_x_nat_t_type_type = natt->encap_type;
1008 n_type->sadb_x_nat_t_type_reserved[0] = 0;
1009 n_type->sadb_x_nat_t_type_reserved[1] = 0;
1010 n_type->sadb_x_nat_t_type_reserved[2] = 0;
1013 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
1014 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1015 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
1016 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
1017 n_port->sadb_x_nat_t_port_reserved = 0;
1020 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
1021 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1022 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
1023 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
1024 n_port->sadb_x_nat_t_port_reserved = 0;
1027 /* security context */
1029 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
1030 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1031 sec_ctx->sadb_x_sec_len =
1032 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1033 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1034 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1035 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1036 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1037 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1045 static inline struct sk_buff *pfkey_xfrm_state2msg(struct xfrm_state *x)
1047 struct sk_buff *skb;
1049 skb = __pfkey_xfrm_state2msg(x, 1, 3);
1054 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x,
1057 return __pfkey_xfrm_state2msg(x, 0, hsc);
1060 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1063 struct xfrm_state *x;
1064 struct sadb_lifetime *lifetime;
1066 struct sadb_key *key;
1067 struct sadb_x_sec_ctx *sec_ctx;
1072 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1074 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1075 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1076 return ERR_PTR(-EINVAL);
1077 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1078 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1079 return ERR_PTR(-EINVAL);
1080 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1081 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1082 return ERR_PTR(-EINVAL);
1083 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1084 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1085 return ERR_PTR(-EINVAL);
1087 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1089 return ERR_PTR(-EINVAL);
1091 /* default error is no buffer space */
1096 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1097 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1098 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1099 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1100 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1103 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1104 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1106 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1107 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1108 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1109 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1110 return ERR_PTR(-EINVAL);
1111 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1113 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1114 ((key->sadb_key_bits+7) / 8 == 0 ||
1115 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1116 return ERR_PTR(-EINVAL);
1117 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1119 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1120 ((key->sadb_key_bits+7) / 8 == 0 ||
1121 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1122 return ERR_PTR(-EINVAL);
1124 x = xfrm_state_alloc();
1126 return ERR_PTR(-ENOBUFS);
1128 x->id.proto = proto;
1129 x->id.spi = sa->sadb_sa_spi;
1130 x->props.replay_window = sa->sadb_sa_replay;
1131 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1132 x->props.flags |= XFRM_STATE_NOECN;
1133 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1134 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1135 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1136 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1138 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1139 if (lifetime != NULL) {
1140 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1141 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1142 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1143 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1145 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1146 if (lifetime != NULL) {
1147 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1148 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1149 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1150 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1153 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1154 if (sec_ctx != NULL) {
1155 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1160 err = security_xfrm_state_alloc(x, uctx);
1167 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1168 if (sa->sadb_sa_auth) {
1170 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1176 keysize = (key->sadb_key_bits + 7) / 8;
1177 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1180 strcpy(x->aalg->alg_name, a->name);
1181 x->aalg->alg_key_len = 0;
1183 x->aalg->alg_key_len = key->sadb_key_bits;
1184 memcpy(x->aalg->alg_key, key+1, keysize);
1186 x->props.aalgo = sa->sadb_sa_auth;
1187 /* x->algo.flags = sa->sadb_sa_flags; */
1189 if (sa->sadb_sa_encrypt) {
1190 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1191 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1196 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1199 strcpy(x->calg->alg_name, a->name);
1200 x->props.calgo = sa->sadb_sa_encrypt;
1203 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1208 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1210 keysize = (key->sadb_key_bits + 7) / 8;
1211 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1214 strcpy(x->ealg->alg_name, a->name);
1215 x->ealg->alg_key_len = 0;
1217 x->ealg->alg_key_len = key->sadb_key_bits;
1218 memcpy(x->ealg->alg_key, key+1, keysize);
1220 x->props.ealgo = sa->sadb_sa_encrypt;
1223 /* x->algo.flags = sa->sadb_sa_flags; */
1225 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1227 if (!x->props.family) {
1228 err = -EAFNOSUPPORT;
1231 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1234 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1235 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1236 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1241 x->props.mode = mode;
1242 x->props.reqid = sa2->sadb_x_sa2_reqid;
1245 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1246 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1248 /* Nobody uses this, but we try. */
1249 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1250 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1254 x->sel.family = x->props.family;
1256 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1257 struct sadb_x_nat_t_type* n_type;
1258 struct xfrm_encap_tmpl *natt;
1260 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1265 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1266 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1268 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1269 struct sadb_x_nat_t_port* n_port =
1270 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1271 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1273 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1274 struct sadb_x_nat_t_port* n_port =
1275 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1276 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1280 err = xfrm_init_state(x);
1284 x->km.seq = hdr->sadb_msg_seq;
1288 x->km.state = XFRM_STATE_DEAD;
1290 return ERR_PTR(err);
1293 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1298 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1300 struct sk_buff *resp_skb;
1301 struct sadb_x_sa2 *sa2;
1302 struct sadb_address *saddr, *daddr;
1303 struct sadb_msg *out_hdr;
1304 struct sadb_spirange *range;
1305 struct xfrm_state *x = NULL;
1308 u32 min_spi, max_spi;
1311 unsigned short family;
1312 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1314 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1315 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1318 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1322 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1323 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1326 reqid = sa2->sadb_x_sa2_reqid;
1332 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1333 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1335 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1338 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1339 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1341 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1343 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1344 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1349 if (hdr->sadb_msg_seq) {
1350 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1351 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1358 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1364 max_spi = 0x0fffffff;
1366 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1368 min_spi = range->sadb_spirange_min;
1369 max_spi = range->sadb_spirange_max;
1372 err = xfrm_alloc_spi(x, min_spi, max_spi);
1373 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1375 if (IS_ERR(resp_skb)) {
1377 return PTR_ERR(resp_skb);
1380 out_hdr = (struct sadb_msg *) resp_skb->data;
1381 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1382 out_hdr->sadb_msg_type = SADB_GETSPI;
1383 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1384 out_hdr->sadb_msg_errno = 0;
1385 out_hdr->sadb_msg_reserved = 0;
1386 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1387 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1391 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1396 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1398 struct xfrm_state *x;
1400 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1403 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1406 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1410 spin_lock_bh(&x->lock);
1411 if (x->km.state == XFRM_STATE_ACQ) {
1412 x->km.state = XFRM_STATE_ERROR;
1415 spin_unlock_bh(&x->lock);
1420 static inline int event2poltype(int event)
1423 case XFRM_MSG_DELPOLICY:
1424 return SADB_X_SPDDELETE;
1425 case XFRM_MSG_NEWPOLICY:
1426 return SADB_X_SPDADD;
1427 case XFRM_MSG_UPDPOLICY:
1428 return SADB_X_SPDUPDATE;
1429 case XFRM_MSG_POLEXPIRE:
1430 // return SADB_X_SPDEXPIRE;
1432 printk("pfkey: Unknown policy event %d\n", event);
1439 static inline int event2keytype(int event)
1442 case XFRM_MSG_DELSA:
1444 case XFRM_MSG_NEWSA:
1446 case XFRM_MSG_UPDSA:
1448 case XFRM_MSG_EXPIRE:
1451 printk("pfkey: Unknown SA event %d\n", event);
1459 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1461 struct sk_buff *skb;
1462 struct sadb_msg *hdr;
1464 skb = pfkey_xfrm_state2msg(x);
1467 return PTR_ERR(skb);
1469 hdr = (struct sadb_msg *) skb->data;
1470 hdr->sadb_msg_version = PF_KEY_V2;
1471 hdr->sadb_msg_type = event2keytype(c->event);
1472 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1473 hdr->sadb_msg_errno = 0;
1474 hdr->sadb_msg_reserved = 0;
1475 hdr->sadb_msg_seq = c->seq;
1476 hdr->sadb_msg_pid = c->pid;
1478 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1483 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1485 struct xfrm_state *x;
1489 x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1494 if (hdr->sadb_msg_type == SADB_ADD)
1495 err = xfrm_state_add(x);
1497 err = xfrm_state_update(x);
1499 xfrm_audit_state_add(x, err ? 0 : 1,
1500 audit_get_loginuid(current),
1501 audit_get_sessionid(current), 0);
1504 x->km.state = XFRM_STATE_DEAD;
1505 __xfrm_state_put(x);
1509 if (hdr->sadb_msg_type == SADB_ADD)
1510 c.event = XFRM_MSG_NEWSA;
1512 c.event = XFRM_MSG_UPDSA;
1513 c.seq = hdr->sadb_msg_seq;
1514 c.pid = hdr->sadb_msg_pid;
1515 km_state_notify(x, &c);
1521 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1523 struct xfrm_state *x;
1527 if (!ext_hdrs[SADB_EXT_SA-1] ||
1528 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1529 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1532 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1536 if ((err = security_xfrm_state_delete(x)))
1539 if (xfrm_state_kern(x)) {
1544 err = xfrm_state_delete(x);
1549 c.seq = hdr->sadb_msg_seq;
1550 c.pid = hdr->sadb_msg_pid;
1551 c.event = XFRM_MSG_DELSA;
1552 km_state_notify(x, &c);
1554 xfrm_audit_state_delete(x, err ? 0 : 1,
1555 audit_get_loginuid(current),
1556 audit_get_sessionid(current), 0);
1562 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1565 struct sk_buff *out_skb;
1566 struct sadb_msg *out_hdr;
1567 struct xfrm_state *x;
1569 if (!ext_hdrs[SADB_EXT_SA-1] ||
1570 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1571 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1574 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1578 out_skb = pfkey_xfrm_state2msg(x);
1579 proto = x->id.proto;
1581 if (IS_ERR(out_skb))
1582 return PTR_ERR(out_skb);
1584 out_hdr = (struct sadb_msg *) out_skb->data;
1585 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1586 out_hdr->sadb_msg_type = SADB_GET;
1587 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1588 out_hdr->sadb_msg_errno = 0;
1589 out_hdr->sadb_msg_reserved = 0;
1590 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1591 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1592 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1597 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1600 struct sk_buff *skb;
1601 struct sadb_msg *hdr;
1602 int len, auth_len, enc_len, i;
1604 auth_len = xfrm_count_auth_supported();
1606 auth_len *= sizeof(struct sadb_alg);
1607 auth_len += sizeof(struct sadb_supported);
1610 enc_len = xfrm_count_enc_supported();
1612 enc_len *= sizeof(struct sadb_alg);
1613 enc_len += sizeof(struct sadb_supported);
1616 len = enc_len + auth_len + sizeof(struct sadb_msg);
1618 skb = alloc_skb(len + 16, allocation);
1622 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1623 pfkey_hdr_dup(hdr, orig);
1624 hdr->sadb_msg_errno = 0;
1625 hdr->sadb_msg_len = len / sizeof(uint64_t);
1628 struct sadb_supported *sp;
1629 struct sadb_alg *ap;
1631 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1632 ap = (struct sadb_alg *) (sp + 1);
1634 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1635 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1637 for (i = 0; ; i++) {
1638 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1641 if (aalg->available)
1647 struct sadb_supported *sp;
1648 struct sadb_alg *ap;
1650 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1651 ap = (struct sadb_alg *) (sp + 1);
1653 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1654 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1656 for (i = 0; ; i++) {
1657 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1660 if (ealg->available)
1669 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1671 struct pfkey_sock *pfk = pfkey_sk(sk);
1672 struct sk_buff *supp_skb;
1674 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1677 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1678 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1680 pfk->registered |= (1<<hdr->sadb_msg_satype);
1685 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1687 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1688 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1693 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1698 static int key_notify_sa_flush(struct km_event *c)
1700 struct sk_buff *skb;
1701 struct sadb_msg *hdr;
1703 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1706 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1707 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1708 hdr->sadb_msg_type = SADB_FLUSH;
1709 hdr->sadb_msg_seq = c->seq;
1710 hdr->sadb_msg_pid = c->pid;
1711 hdr->sadb_msg_version = PF_KEY_V2;
1712 hdr->sadb_msg_errno = (uint8_t) 0;
1713 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1715 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1720 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1724 struct xfrm_audit audit_info;
1727 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1731 audit_info.loginuid = audit_get_loginuid(current);
1732 audit_info.sessionid = audit_get_sessionid(current);
1733 audit_info.secid = 0;
1734 err = xfrm_state_flush(proto, &audit_info);
1737 c.data.proto = proto;
1738 c.seq = hdr->sadb_msg_seq;
1739 c.pid = hdr->sadb_msg_pid;
1740 c.event = XFRM_MSG_FLUSHSA;
1741 km_state_notify(NULL, &c);
1746 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1748 struct pfkey_sock *pfk = ptr;
1749 struct sk_buff *out_skb;
1750 struct sadb_msg *out_hdr;
1752 if (!pfkey_can_dump(&pfk->sk))
1755 out_skb = pfkey_xfrm_state2msg(x);
1756 if (IS_ERR(out_skb))
1757 return PTR_ERR(out_skb);
1759 out_hdr = (struct sadb_msg *) out_skb->data;
1760 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1761 out_hdr->sadb_msg_type = SADB_DUMP;
1762 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1763 out_hdr->sadb_msg_errno = 0;
1764 out_hdr->sadb_msg_reserved = 0;
1765 out_hdr->sadb_msg_seq = count + 1;
1766 out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
1769 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
1771 pfk->dump.skb = out_skb;
1776 static int pfkey_dump_sa(struct pfkey_sock *pfk)
1778 return xfrm_state_walk(&pfk->dump.u.state, dump_sa, (void *) pfk);
1781 static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1783 xfrm_state_walk_done(&pfk->dump.u.state);
1786 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1789 struct pfkey_sock *pfk = pfkey_sk(sk);
1791 if (pfk->dump.dump != NULL)
1794 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1798 pfk->dump.msg_version = hdr->sadb_msg_version;
1799 pfk->dump.msg_pid = hdr->sadb_msg_pid;
1800 pfk->dump.dump = pfkey_dump_sa;
1801 pfk->dump.done = pfkey_dump_sa_done;
1802 xfrm_state_walk_init(&pfk->dump.u.state, proto);
1804 return pfkey_do_dump(pfk);
1807 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1809 struct pfkey_sock *pfk = pfkey_sk(sk);
1810 int satype = hdr->sadb_msg_satype;
1812 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1813 /* XXX we mangle packet... */
1814 hdr->sadb_msg_errno = 0;
1815 if (satype != 0 && satype != 1)
1817 pfk->promisc = satype;
1819 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1823 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1826 u32 reqid = *(u32*)ptr;
1828 for (i=0; i<xp->xfrm_nr; i++) {
1829 if (xp->xfrm_vec[i].reqid == reqid)
1835 static u32 gen_reqid(void)
1837 struct xfrm_policy_walk walk;
1840 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1846 reqid = IPSEC_MANUAL_REQID_MAX+1;
1847 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1848 rc = xfrm_policy_walk(&walk, check_reqid, (void*)&reqid);
1849 xfrm_policy_walk_done(&walk);
1852 } while (reqid != start);
1857 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1859 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1862 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1865 if (rq->sadb_x_ipsecrequest_mode == 0)
1868 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1869 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1872 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1874 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1875 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1876 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1878 if (!t->reqid && !(t->reqid = gen_reqid()))
1882 /* addresses present only in tunnel mode */
1883 if (t->mode == XFRM_MODE_TUNNEL) {
1884 u8 *sa = (u8 *) (rq + 1);
1885 int family, socklen;
1887 family = pfkey_sockaddr_extract((struct sockaddr *)sa,
1892 socklen = pfkey_sockaddr_len(family);
1893 if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen),
1894 &t->id.daddr) != family)
1896 t->encap_family = family;
1898 t->encap_family = xp->family;
1900 /* No way to set this via kame pfkey */
1907 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1910 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1911 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1913 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1914 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1916 len -= rq->sadb_x_ipsecrequest_len;
1917 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1922 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1924 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1927 int len = sizeof(struct sadb_x_sec_ctx);
1928 len += xfrm_ctx->ctx_len;
1929 return PFKEY_ALIGN8(len);
1934 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1936 struct xfrm_tmpl *t;
1937 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1941 for (i=0; i<xp->xfrm_nr; i++) {
1942 t = xp->xfrm_vec + i;
1943 socklen += pfkey_sockaddr_len(t->encap_family);
1946 return sizeof(struct sadb_msg) +
1947 (sizeof(struct sadb_lifetime) * 3) +
1948 (sizeof(struct sadb_address) * 2) +
1949 (sockaddr_size * 2) +
1950 sizeof(struct sadb_x_policy) +
1951 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1953 pfkey_xfrm_policy2sec_ctx_size(xp);
1956 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1958 struct sk_buff *skb;
1961 size = pfkey_xfrm_policy2msg_size(xp);
1963 skb = alloc_skb(size + 16, GFP_ATOMIC);
1965 return ERR_PTR(-ENOBUFS);
1970 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1972 struct sadb_msg *hdr;
1973 struct sadb_address *addr;
1974 struct sadb_lifetime *lifetime;
1975 struct sadb_x_policy *pol;
1976 struct sadb_x_sec_ctx *sec_ctx;
1977 struct xfrm_sec_ctx *xfrm_ctx;
1980 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1981 int socklen = pfkey_sockaddr_len(xp->family);
1983 size = pfkey_xfrm_policy2msg_size(xp);
1985 /* call should fill header later */
1986 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1987 memset(hdr, 0, size); /* XXX do we need this ? */
1990 addr = (struct sadb_address*) skb_put(skb,
1991 sizeof(struct sadb_address)+sockaddr_size);
1992 addr->sadb_address_len =
1993 (sizeof(struct sadb_address)+sockaddr_size)/
1995 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1996 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1997 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1998 addr->sadb_address_reserved = 0;
1999 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2001 (struct sockaddr *) (addr + 1),
2006 addr = (struct sadb_address*) skb_put(skb,
2007 sizeof(struct sadb_address)+sockaddr_size);
2008 addr->sadb_address_len =
2009 (sizeof(struct sadb_address)+sockaddr_size)/
2011 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2012 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2013 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2014 addr->sadb_address_reserved = 0;
2016 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2017 (struct sockaddr *) (addr + 1),
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_HARD;
2026 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2027 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2028 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2029 lifetime->sadb_lifetime_usetime = xp->lft.hard_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_SOFT;
2036 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2037 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2038 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2039 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2041 lifetime = (struct sadb_lifetime *) skb_put(skb,
2042 sizeof(struct sadb_lifetime));
2043 lifetime->sadb_lifetime_len =
2044 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2045 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2046 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2047 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2048 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2049 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2051 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2052 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2053 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2054 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2055 if (xp->action == XFRM_POLICY_ALLOW) {
2057 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2059 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2061 pol->sadb_x_policy_dir = dir+1;
2062 pol->sadb_x_policy_id = xp->index;
2063 pol->sadb_x_policy_priority = xp->priority;
2065 for (i=0; i<xp->xfrm_nr; i++) {
2066 struct sadb_x_ipsecrequest *rq;
2067 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2071 req_size = sizeof(struct sadb_x_ipsecrequest);
2072 if (t->mode == XFRM_MODE_TUNNEL) {
2073 socklen = pfkey_sockaddr_len(t->encap_family);
2074 req_size += socklen * 2;
2079 rq = (void*)skb_put(skb, req_size);
2080 pol->sadb_x_policy_len += req_size/8;
2081 memset(rq, 0, sizeof(*rq));
2082 rq->sadb_x_ipsecrequest_len = req_size;
2083 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2084 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2086 rq->sadb_x_ipsecrequest_mode = mode;
2087 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2089 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2091 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2092 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2094 if (t->mode == XFRM_MODE_TUNNEL) {
2095 u8 *sa = (void *)(rq + 1);
2096 pfkey_sockaddr_fill(&t->saddr, 0,
2097 (struct sockaddr *)sa,
2099 pfkey_sockaddr_fill(&t->id.daddr, 0,
2100 (struct sockaddr *) (sa + socklen),
2105 /* security context */
2106 if ((xfrm_ctx = xp->security)) {
2107 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2109 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2110 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2111 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2112 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2113 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2114 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2115 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2119 hdr->sadb_msg_len = size / sizeof(uint64_t);
2120 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2125 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2127 struct sk_buff *out_skb;
2128 struct sadb_msg *out_hdr;
2131 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2132 if (IS_ERR(out_skb)) {
2133 err = PTR_ERR(out_skb);
2136 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2140 out_hdr = (struct sadb_msg *) out_skb->data;
2141 out_hdr->sadb_msg_version = PF_KEY_V2;
2143 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2144 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2146 out_hdr->sadb_msg_type = event2poltype(c->event);
2147 out_hdr->sadb_msg_errno = 0;
2148 out_hdr->sadb_msg_seq = c->seq;
2149 out_hdr->sadb_msg_pid = c->pid;
2150 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2156 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2159 struct sadb_lifetime *lifetime;
2160 struct sadb_address *sa;
2161 struct sadb_x_policy *pol;
2162 struct xfrm_policy *xp;
2164 struct sadb_x_sec_ctx *sec_ctx;
2166 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2167 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2168 !ext_hdrs[SADB_X_EXT_POLICY-1])
2171 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2172 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2174 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2177 xp = xfrm_policy_alloc(GFP_KERNEL);
2181 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2182 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2183 xp->priority = pol->sadb_x_policy_priority;
2185 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2186 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2191 xp->selector.family = xp->family;
2192 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2193 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2194 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2195 if (xp->selector.sport)
2196 xp->selector.sport_mask = htons(0xffff);
2198 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2199 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2200 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2202 /* Amusing, we set this twice. KAME apps appear to set same value
2203 * in both addresses.
2205 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2207 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2208 if (xp->selector.dport)
2209 xp->selector.dport_mask = htons(0xffff);
2211 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2212 if (sec_ctx != NULL) {
2213 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2220 err = security_xfrm_policy_alloc(&xp->security, uctx);
2227 xp->lft.soft_byte_limit = XFRM_INF;
2228 xp->lft.hard_byte_limit = XFRM_INF;
2229 xp->lft.soft_packet_limit = XFRM_INF;
2230 xp->lft.hard_packet_limit = XFRM_INF;
2231 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2232 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2233 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2234 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2235 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2237 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2238 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2239 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2240 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2241 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2244 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2245 (err = parse_ipsecrequests(xp, pol)) < 0)
2248 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2249 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2251 xfrm_audit_policy_add(xp, err ? 0 : 1,
2252 audit_get_loginuid(current),
2253 audit_get_sessionid(current), 0);
2258 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2259 c.event = XFRM_MSG_UPDPOLICY;
2261 c.event = XFRM_MSG_NEWPOLICY;
2263 c.seq = hdr->sadb_msg_seq;
2264 c.pid = hdr->sadb_msg_pid;
2266 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2272 xfrm_policy_destroy(xp);
2276 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2279 struct sadb_address *sa;
2280 struct sadb_x_policy *pol;
2281 struct xfrm_policy *xp;
2282 struct xfrm_selector sel;
2284 struct sadb_x_sec_ctx *sec_ctx;
2285 struct xfrm_sec_ctx *pol_ctx = NULL;
2287 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2288 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2289 !ext_hdrs[SADB_X_EXT_POLICY-1])
2292 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2293 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2296 memset(&sel, 0, sizeof(sel));
2298 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2299 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2300 sel.prefixlen_s = sa->sadb_address_prefixlen;
2301 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2302 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2304 sel.sport_mask = htons(0xffff);
2306 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2307 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2308 sel.prefixlen_d = sa->sadb_address_prefixlen;
2309 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2310 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2312 sel.dport_mask = htons(0xffff);
2314 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2315 if (sec_ctx != NULL) {
2316 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2321 err = security_xfrm_policy_alloc(&pol_ctx, uctx);
2327 xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN,
2328 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2330 security_xfrm_policy_free(pol_ctx);
2334 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2335 audit_get_loginuid(current),
2336 audit_get_sessionid(current), 0);
2341 c.seq = hdr->sadb_msg_seq;
2342 c.pid = hdr->sadb_msg_pid;
2343 c.event = XFRM_MSG_DELPOLICY;
2344 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2351 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2354 struct sk_buff *out_skb;
2355 struct sadb_msg *out_hdr;
2358 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2359 if (IS_ERR(out_skb)) {
2360 err = PTR_ERR(out_skb);
2363 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2367 out_hdr = (struct sadb_msg *) out_skb->data;
2368 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2369 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2370 out_hdr->sadb_msg_satype = 0;
2371 out_hdr->sadb_msg_errno = 0;
2372 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2373 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2374 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2381 #ifdef CONFIG_NET_KEY_MIGRATE
2382 static int pfkey_sockaddr_pair_size(sa_family_t family)
2384 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2387 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2388 xfrm_address_t *saddr, xfrm_address_t *daddr,
2391 u8 *sa = (u8 *) (rq + 1);
2394 if (rq->sadb_x_ipsecrequest_len <
2395 pfkey_sockaddr_pair_size(((struct sockaddr *)sa)->sa_family))
2398 af = pfkey_sockaddr_extract((struct sockaddr *) sa,
2403 socklen = pfkey_sockaddr_len(af);
2404 if (pfkey_sockaddr_extract((struct sockaddr *) (sa + socklen),
2412 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2413 struct xfrm_migrate *m)
2416 struct sadb_x_ipsecrequest *rq2;
2419 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2420 len < rq1->sadb_x_ipsecrequest_len)
2424 err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2429 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2430 len -= rq1->sadb_x_ipsecrequest_len;
2432 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2433 len < rq2->sadb_x_ipsecrequest_len)
2437 err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2442 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2443 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2444 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2447 m->proto = rq1->sadb_x_ipsecrequest_proto;
2448 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2451 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2453 return ((int)(rq1->sadb_x_ipsecrequest_len +
2454 rq2->sadb_x_ipsecrequest_len));
2457 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2458 struct sadb_msg *hdr, void **ext_hdrs)
2460 int i, len, ret, err = -EINVAL;
2462 struct sadb_address *sa;
2463 struct sadb_x_policy *pol;
2464 struct sadb_x_ipsecrequest *rq;
2465 struct xfrm_selector sel;
2466 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2468 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2469 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2470 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2475 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2481 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2486 dir = pol->sadb_x_policy_dir - 1;
2487 memset(&sel, 0, sizeof(sel));
2489 /* set source address info of selector */
2490 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2491 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2492 sel.prefixlen_s = sa->sadb_address_prefixlen;
2493 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2494 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2496 sel.sport_mask = htons(0xffff);
2498 /* set destination address info of selector */
2499 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2500 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2501 sel.prefixlen_d = sa->sadb_address_prefixlen;
2502 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2503 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2505 sel.dport_mask = htons(0xffff);
2507 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2509 /* extract ipsecrequests */
2511 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2513 while (len > 0 && i < XFRM_MAX_DEPTH) {
2514 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2519 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2525 if (!i || len > 0) {
2530 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2536 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2537 struct sadb_msg *hdr, void **ext_hdrs)
2539 return -ENOPROTOOPT;
2544 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2547 int err = 0, delete;
2548 struct sadb_x_policy *pol;
2549 struct xfrm_policy *xp;
2552 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2555 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2556 if (dir >= XFRM_POLICY_MAX)
2559 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2560 xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2566 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2567 audit_get_loginuid(current),
2568 audit_get_sessionid(current), 0);
2572 c.seq = hdr->sadb_msg_seq;
2573 c.pid = hdr->sadb_msg_pid;
2575 c.event = XFRM_MSG_DELPOLICY;
2576 km_policy_notify(xp, dir, &c);
2578 err = key_pol_get_resp(sk, xp, hdr, dir);
2586 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2588 struct pfkey_sock *pfk = ptr;
2589 struct sk_buff *out_skb;
2590 struct sadb_msg *out_hdr;
2593 if (!pfkey_can_dump(&pfk->sk))
2596 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2597 if (IS_ERR(out_skb))
2598 return PTR_ERR(out_skb);
2600 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2604 out_hdr = (struct sadb_msg *) out_skb->data;
2605 out_hdr->sadb_msg_version = pfk->dump.msg_version;
2606 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2607 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2608 out_hdr->sadb_msg_errno = 0;
2609 out_hdr->sadb_msg_seq = count + 1;
2610 out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
2613 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
2615 pfk->dump.skb = out_skb;
2620 static int pfkey_dump_sp(struct pfkey_sock *pfk)
2622 return xfrm_policy_walk(&pfk->dump.u.policy, dump_sp, (void *) pfk);
2625 static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2627 xfrm_policy_walk_done(&pfk->dump.u.policy);
2630 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2632 struct pfkey_sock *pfk = pfkey_sk(sk);
2634 if (pfk->dump.dump != NULL)
2637 pfk->dump.msg_version = hdr->sadb_msg_version;
2638 pfk->dump.msg_pid = hdr->sadb_msg_pid;
2639 pfk->dump.dump = pfkey_dump_sp;
2640 pfk->dump.done = pfkey_dump_sp_done;
2641 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2643 return pfkey_do_dump(pfk);
2646 static int key_notify_policy_flush(struct km_event *c)
2648 struct sk_buff *skb_out;
2649 struct sadb_msg *hdr;
2651 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2654 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2655 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2656 hdr->sadb_msg_seq = c->seq;
2657 hdr->sadb_msg_pid = c->pid;
2658 hdr->sadb_msg_version = PF_KEY_V2;
2659 hdr->sadb_msg_errno = (uint8_t) 0;
2660 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2661 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2666 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2669 struct xfrm_audit audit_info;
2672 audit_info.loginuid = audit_get_loginuid(current);
2673 audit_info.sessionid = audit_get_sessionid(current);
2674 audit_info.secid = 0;
2675 err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2678 c.data.type = XFRM_POLICY_TYPE_MAIN;
2679 c.event = XFRM_MSG_FLUSHPOLICY;
2680 c.pid = hdr->sadb_msg_pid;
2681 c.seq = hdr->sadb_msg_seq;
2682 km_policy_notify(NULL, 0, &c);
2687 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2688 struct sadb_msg *hdr, void **ext_hdrs);
2689 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2690 [SADB_RESERVED] = pfkey_reserved,
2691 [SADB_GETSPI] = pfkey_getspi,
2692 [SADB_UPDATE] = pfkey_add,
2693 [SADB_ADD] = pfkey_add,
2694 [SADB_DELETE] = pfkey_delete,
2695 [SADB_GET] = pfkey_get,
2696 [SADB_ACQUIRE] = pfkey_acquire,
2697 [SADB_REGISTER] = pfkey_register,
2698 [SADB_EXPIRE] = NULL,
2699 [SADB_FLUSH] = pfkey_flush,
2700 [SADB_DUMP] = pfkey_dump,
2701 [SADB_X_PROMISC] = pfkey_promisc,
2702 [SADB_X_PCHANGE] = NULL,
2703 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2704 [SADB_X_SPDADD] = pfkey_spdadd,
2705 [SADB_X_SPDDELETE] = pfkey_spddelete,
2706 [SADB_X_SPDGET] = pfkey_spdget,
2707 [SADB_X_SPDACQUIRE] = NULL,
2708 [SADB_X_SPDDUMP] = pfkey_spddump,
2709 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2710 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2711 [SADB_X_SPDDELETE2] = pfkey_spdget,
2712 [SADB_X_MIGRATE] = pfkey_migrate,
2715 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2717 void *ext_hdrs[SADB_EXT_MAX];
2720 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2721 BROADCAST_PROMISC_ONLY, NULL);
2723 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2724 err = parse_exthdrs(skb, hdr, ext_hdrs);
2727 if (pfkey_funcs[hdr->sadb_msg_type])
2728 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2733 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2735 struct sadb_msg *hdr = NULL;
2737 if (skb->len < sizeof(*hdr)) {
2740 hdr = (struct sadb_msg *) skb->data;
2741 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2742 hdr->sadb_msg_reserved != 0 ||
2743 (hdr->sadb_msg_type <= SADB_RESERVED ||
2744 hdr->sadb_msg_type > SADB_MAX)) {
2747 } else if (hdr->sadb_msg_len != (skb->len /
2748 sizeof(uint64_t)) ||
2749 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2750 sizeof(uint64_t))) {
2760 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2762 unsigned int id = d->desc.sadb_alg_id;
2764 if (id >= sizeof(t->aalgos) * 8)
2767 return (t->aalgos >> id) & 1;
2770 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2772 unsigned int id = d->desc.sadb_alg_id;
2774 if (id >= sizeof(t->ealgos) * 8)
2777 return (t->ealgos >> id) & 1;
2780 static int count_ah_combs(struct xfrm_tmpl *t)
2784 for (i = 0; ; i++) {
2785 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2788 if (aalg_tmpl_set(t, aalg) && aalg->available)
2789 sz += sizeof(struct sadb_comb);
2791 return sz + sizeof(struct sadb_prop);
2794 static int count_esp_combs(struct xfrm_tmpl *t)
2798 for (i = 0; ; i++) {
2799 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2803 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2806 for (k = 1; ; k++) {
2807 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2811 if (aalg_tmpl_set(t, aalg) && aalg->available)
2812 sz += sizeof(struct sadb_comb);
2815 return sz + sizeof(struct sadb_prop);
2818 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2820 struct sadb_prop *p;
2823 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2824 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2825 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2826 p->sadb_prop_replay = 32;
2827 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2829 for (i = 0; ; i++) {
2830 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2834 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2835 struct sadb_comb *c;
2836 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2837 memset(c, 0, sizeof(*c));
2838 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2839 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2840 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2841 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2842 c->sadb_comb_hard_addtime = 24*60*60;
2843 c->sadb_comb_soft_addtime = 20*60*60;
2844 c->sadb_comb_hard_usetime = 8*60*60;
2845 c->sadb_comb_soft_usetime = 7*60*60;
2850 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2852 struct sadb_prop *p;
2855 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2856 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2857 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2858 p->sadb_prop_replay = 32;
2859 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2862 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2866 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2869 for (k = 1; ; k++) {
2870 struct sadb_comb *c;
2871 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2874 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2876 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2877 memset(c, 0, sizeof(*c));
2878 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2879 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2880 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2881 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2882 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2883 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2884 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2885 c->sadb_comb_hard_addtime = 24*60*60;
2886 c->sadb_comb_soft_addtime = 20*60*60;
2887 c->sadb_comb_hard_usetime = 8*60*60;
2888 c->sadb_comb_soft_usetime = 7*60*60;
2893 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2898 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2900 struct sk_buff *out_skb;
2901 struct sadb_msg *out_hdr;
2905 hard = c->data.hard;
2911 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
2912 if (IS_ERR(out_skb))
2913 return PTR_ERR(out_skb);
2915 out_hdr = (struct sadb_msg *) out_skb->data;
2916 out_hdr->sadb_msg_version = PF_KEY_V2;
2917 out_hdr->sadb_msg_type = SADB_EXPIRE;
2918 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2919 out_hdr->sadb_msg_errno = 0;
2920 out_hdr->sadb_msg_reserved = 0;
2921 out_hdr->sadb_msg_seq = 0;
2922 out_hdr->sadb_msg_pid = 0;
2924 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2928 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2930 if (atomic_read(&pfkey_socks_nr) == 0)
2934 case XFRM_MSG_EXPIRE:
2935 return key_notify_sa_expire(x, c);
2936 case XFRM_MSG_DELSA:
2937 case XFRM_MSG_NEWSA:
2938 case XFRM_MSG_UPDSA:
2939 return key_notify_sa(x, c);
2940 case XFRM_MSG_FLUSHSA:
2941 return key_notify_sa_flush(c);
2942 case XFRM_MSG_NEWAE: /* not yet supported */
2945 printk("pfkey: Unknown SA event %d\n", c->event);
2952 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2954 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2958 case XFRM_MSG_POLEXPIRE:
2959 return key_notify_policy_expire(xp, c);
2960 case XFRM_MSG_DELPOLICY:
2961 case XFRM_MSG_NEWPOLICY:
2962 case XFRM_MSG_UPDPOLICY:
2963 return key_notify_policy(xp, dir, c);
2964 case XFRM_MSG_FLUSHPOLICY:
2965 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2967 return key_notify_policy_flush(c);
2969 printk("pfkey: Unknown policy event %d\n", c->event);
2976 static u32 get_acqseq(void)
2980 static DEFINE_SPINLOCK(acqseq_lock);
2982 spin_lock_bh(&acqseq_lock);
2983 res = (++acqseq ? : ++acqseq);
2984 spin_unlock_bh(&acqseq_lock);
2988 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
2990 struct sk_buff *skb;
2991 struct sadb_msg *hdr;
2992 struct sadb_address *addr;
2993 struct sadb_x_policy *pol;
2996 struct sadb_x_sec_ctx *sec_ctx;
2997 struct xfrm_sec_ctx *xfrm_ctx;
3000 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3004 size = sizeof(struct sadb_msg) +
3005 (sizeof(struct sadb_address) * 2) +
3006 (sockaddr_size * 2) +
3007 sizeof(struct sadb_x_policy);
3009 if (x->id.proto == IPPROTO_AH)
3010 size += count_ah_combs(t);
3011 else if (x->id.proto == IPPROTO_ESP)
3012 size += count_esp_combs(t);
3014 if ((xfrm_ctx = x->security)) {
3015 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3016 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3019 skb = alloc_skb(size + 16, GFP_ATOMIC);
3023 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3024 hdr->sadb_msg_version = PF_KEY_V2;
3025 hdr->sadb_msg_type = SADB_ACQUIRE;
3026 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3027 hdr->sadb_msg_len = size / sizeof(uint64_t);
3028 hdr->sadb_msg_errno = 0;
3029 hdr->sadb_msg_reserved = 0;
3030 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3031 hdr->sadb_msg_pid = 0;
3034 addr = (struct sadb_address*) skb_put(skb,
3035 sizeof(struct sadb_address)+sockaddr_size);
3036 addr->sadb_address_len =
3037 (sizeof(struct sadb_address)+sockaddr_size)/
3039 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3040 addr->sadb_address_proto = 0;
3041 addr->sadb_address_reserved = 0;
3042 addr->sadb_address_prefixlen =
3043 pfkey_sockaddr_fill(&x->props.saddr, 0,
3044 (struct sockaddr *) (addr + 1),
3046 if (!addr->sadb_address_prefixlen)
3050 addr = (struct sadb_address*) skb_put(skb,
3051 sizeof(struct sadb_address)+sockaddr_size);
3052 addr->sadb_address_len =
3053 (sizeof(struct sadb_address)+sockaddr_size)/
3055 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3056 addr->sadb_address_proto = 0;
3057 addr->sadb_address_reserved = 0;
3058 addr->sadb_address_prefixlen =
3059 pfkey_sockaddr_fill(&x->id.daddr, 0,
3060 (struct sockaddr *) (addr + 1),
3062 if (!addr->sadb_address_prefixlen)
3065 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3066 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3067 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3068 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3069 pol->sadb_x_policy_dir = dir+1;
3070 pol->sadb_x_policy_id = xp->index;
3072 /* Set sadb_comb's. */
3073 if (x->id.proto == IPPROTO_AH)
3074 dump_ah_combs(skb, t);
3075 else if (x->id.proto == IPPROTO_ESP)
3076 dump_esp_combs(skb, t);
3078 /* security context */
3080 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3081 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3082 sec_ctx->sadb_x_sec_len =
3083 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3084 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3085 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3086 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3087 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3088 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3092 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3095 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3096 u8 *data, int len, int *dir)
3098 struct xfrm_policy *xp;
3099 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3100 struct sadb_x_sec_ctx *sec_ctx;
3102 switch (sk->sk_family) {
3104 if (opt != IP_IPSEC_POLICY) {
3109 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3111 if (opt != IPV6_IPSEC_POLICY) {
3124 if (len < sizeof(struct sadb_x_policy) ||
3125 pol->sadb_x_policy_len*8 > len ||
3126 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3127 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3130 xp = xfrm_policy_alloc(GFP_ATOMIC);
3136 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3137 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3139 xp->lft.soft_byte_limit = XFRM_INF;
3140 xp->lft.hard_byte_limit = XFRM_INF;
3141 xp->lft.soft_packet_limit = XFRM_INF;
3142 xp->lft.hard_packet_limit = XFRM_INF;
3143 xp->family = sk->sk_family;
3146 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3147 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3150 /* security context too */
3151 if (len >= (pol->sadb_x_policy_len*8 +
3152 sizeof(struct sadb_x_sec_ctx))) {
3153 char *p = (char *)pol;
3154 struct xfrm_user_sec_ctx *uctx;
3156 p += pol->sadb_x_policy_len*8;
3157 sec_ctx = (struct sadb_x_sec_ctx *)p;
3158 if (len < pol->sadb_x_policy_len*8 +
3159 sec_ctx->sadb_x_sec_len) {
3163 if ((*dir = verify_sec_ctx_len(p)))
3165 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3166 *dir = security_xfrm_policy_alloc(&xp->security, uctx);
3173 *dir = pol->sadb_x_policy_dir-1;
3177 xfrm_policy_destroy(xp);
3181 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3183 struct sk_buff *skb;
3184 struct sadb_msg *hdr;
3186 struct sadb_address *addr;
3187 struct sadb_x_nat_t_port *n_port;
3190 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3191 struct xfrm_encap_tmpl *natt = NULL;
3193 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3205 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3207 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3208 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3211 size = sizeof(struct sadb_msg) +
3212 sizeof(struct sadb_sa) +
3213 (sizeof(struct sadb_address) * 2) +
3214 (sockaddr_size * 2) +
3215 (sizeof(struct sadb_x_nat_t_port) * 2);
3217 skb = alloc_skb(size + 16, GFP_ATOMIC);
3221 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3222 hdr->sadb_msg_version = PF_KEY_V2;
3223 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3224 hdr->sadb_msg_satype = satype;
3225 hdr->sadb_msg_len = size / sizeof(uint64_t);
3226 hdr->sadb_msg_errno = 0;
3227 hdr->sadb_msg_reserved = 0;
3228 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3229 hdr->sadb_msg_pid = 0;
3232 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3233 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3234 sa->sadb_sa_exttype = SADB_EXT_SA;
3235 sa->sadb_sa_spi = x->id.spi;
3236 sa->sadb_sa_replay = 0;
3237 sa->sadb_sa_state = 0;
3238 sa->sadb_sa_auth = 0;
3239 sa->sadb_sa_encrypt = 0;
3240 sa->sadb_sa_flags = 0;
3242 /* ADDRESS_SRC (old addr) */
3243 addr = (struct sadb_address*)
3244 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3245 addr->sadb_address_len =
3246 (sizeof(struct sadb_address)+sockaddr_size)/
3248 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3249 addr->sadb_address_proto = 0;
3250 addr->sadb_address_reserved = 0;
3251 addr->sadb_address_prefixlen =
3252 pfkey_sockaddr_fill(&x->props.saddr, 0,
3253 (struct sockaddr *) (addr + 1),
3255 if (!addr->sadb_address_prefixlen)
3258 /* NAT_T_SPORT (old port) */
3259 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3260 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3261 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3262 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3263 n_port->sadb_x_nat_t_port_reserved = 0;
3265 /* ADDRESS_DST (new addr) */
3266 addr = (struct sadb_address*)
3267 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3268 addr->sadb_address_len =
3269 (sizeof(struct sadb_address)+sockaddr_size)/
3271 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3272 addr->sadb_address_proto = 0;
3273 addr->sadb_address_reserved = 0;
3274 addr->sadb_address_prefixlen =
3275 pfkey_sockaddr_fill(ipaddr, 0,
3276 (struct sockaddr *) (addr + 1),
3278 if (!addr->sadb_address_prefixlen)
3281 /* NAT_T_DPORT (new port) */
3282 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3283 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3284 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3285 n_port->sadb_x_nat_t_port_port = sport;
3286 n_port->sadb_x_nat_t_port_reserved = 0;
3288 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3291 #ifdef CONFIG_NET_KEY_MIGRATE
3292 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3293 struct xfrm_selector *sel)
3295 struct sadb_address *addr;
3296 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3297 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3298 addr->sadb_address_exttype = type;
3299 addr->sadb_address_proto = sel->proto;
3300 addr->sadb_address_reserved = 0;
3303 case SADB_EXT_ADDRESS_SRC:
3304 addr->sadb_address_prefixlen = sel->prefixlen_s;
3305 pfkey_sockaddr_fill(&sel->saddr, 0,
3306 (struct sockaddr *)(addr + 1),
3309 case SADB_EXT_ADDRESS_DST:
3310 addr->sadb_address_prefixlen = sel->prefixlen_d;
3311 pfkey_sockaddr_fill(&sel->daddr, 0,
3312 (struct sockaddr *)(addr + 1),
3322 static int set_ipsecrequest(struct sk_buff *skb,
3323 uint8_t proto, uint8_t mode, int level,
3324 uint32_t reqid, uint8_t family,
3325 xfrm_address_t *src, xfrm_address_t *dst)
3327 struct sadb_x_ipsecrequest *rq;
3329 int socklen = pfkey_sockaddr_len(family);
3332 size_req = sizeof(struct sadb_x_ipsecrequest) +
3333 pfkey_sockaddr_pair_size(family);
3335 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3336 memset(rq, 0, size_req);
3337 rq->sadb_x_ipsecrequest_len = size_req;
3338 rq->sadb_x_ipsecrequest_proto = proto;
3339 rq->sadb_x_ipsecrequest_mode = mode;
3340 rq->sadb_x_ipsecrequest_level = level;
3341 rq->sadb_x_ipsecrequest_reqid = reqid;
3343 sa = (u8 *) (rq + 1);
3344 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3345 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3352 #ifdef CONFIG_NET_KEY_MIGRATE
3353 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3354 struct xfrm_migrate *m, int num_bundles)
3360 struct sk_buff *skb;
3361 struct sadb_msg *hdr;
3362 struct sadb_x_policy *pol;
3363 struct xfrm_migrate *mp;
3365 if (type != XFRM_POLICY_TYPE_MAIN)
3368 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3372 sasize_sel = pfkey_sockaddr_size(sel->family);
3375 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3378 size_pol += sizeof(struct sadb_x_policy);
3381 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3382 /* old locator pair */
3383 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3384 pfkey_sockaddr_pair_size(mp->old_family);
3385 /* new locator pair */
3386 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3387 pfkey_sockaddr_pair_size(mp->new_family);
3390 size += sizeof(struct sadb_msg) + size_pol;
3393 skb = alloc_skb(size, GFP_ATOMIC);
3397 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3398 hdr->sadb_msg_version = PF_KEY_V2;
3399 hdr->sadb_msg_type = SADB_X_MIGRATE;
3400 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3401 hdr->sadb_msg_len = size / 8;
3402 hdr->sadb_msg_errno = 0;
3403 hdr->sadb_msg_reserved = 0;
3404 hdr->sadb_msg_seq = 0;
3405 hdr->sadb_msg_pid = 0;
3408 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3411 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3413 /* policy information */
3414 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3415 pol->sadb_x_policy_len = size_pol / 8;
3416 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3417 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3418 pol->sadb_x_policy_dir = dir + 1;
3419 pol->sadb_x_policy_id = 0;
3420 pol->sadb_x_policy_priority = 0;
3422 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3423 /* old ipsecrequest */
3424 int mode = pfkey_mode_from_xfrm(mp->mode);
3427 if (set_ipsecrequest(skb, mp->proto, mode,
3428 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3429 mp->reqid, mp->old_family,
3430 &mp->old_saddr, &mp->old_daddr) < 0)
3433 /* new ipsecrequest */
3434 if (set_ipsecrequest(skb, mp->proto, mode,
3435 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3436 mp->reqid, mp->new_family,
3437 &mp->new_saddr, &mp->new_daddr) < 0)
3441 /* broadcast migrate message to sockets */
3442 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3451 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3452 struct xfrm_migrate *m, int num_bundles)
3454 return -ENOPROTOOPT;
3458 static int pfkey_sendmsg(struct kiocb *kiocb,
3459 struct socket *sock, struct msghdr *msg, size_t len)
3461 struct sock *sk = sock->sk;
3462 struct sk_buff *skb = NULL;
3463 struct sadb_msg *hdr = NULL;
3467 if (msg->msg_flags & MSG_OOB)
3471 if ((unsigned)len > sk->sk_sndbuf - 32)
3475 skb = alloc_skb(len, GFP_KERNEL);
3480 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3483 hdr = pfkey_get_base_msg(skb, &err);
3487 mutex_lock(&xfrm_cfg_mutex);
3488 err = pfkey_process(sk, skb, hdr);
3489 mutex_unlock(&xfrm_cfg_mutex);
3492 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3500 static int pfkey_recvmsg(struct kiocb *kiocb,
3501 struct socket *sock, struct msghdr *msg, size_t len,
3504 struct sock *sk = sock->sk;
3505 struct pfkey_sock *pfk = pfkey_sk(sk);
3506 struct sk_buff *skb;
3510 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3513 msg->msg_namelen = 0;
3514 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3520 msg->msg_flags |= MSG_TRUNC;
3524 skb_reset_transport_header(skb);
3525 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3529 sock_recv_timestamp(msg, sk, skb);
3531 err = (flags & MSG_TRUNC) ? skb->len : copied;
3533 if (pfk->dump.dump != NULL &&
3534 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3538 skb_free_datagram(sk, skb);
3543 static const struct proto_ops pfkey_ops = {
3545 .owner = THIS_MODULE,
3546 /* Operations that make no sense on pfkey sockets. */
3547 .bind = sock_no_bind,
3548 .connect = sock_no_connect,
3549 .socketpair = sock_no_socketpair,
3550 .accept = sock_no_accept,
3551 .getname = sock_no_getname,
3552 .ioctl = sock_no_ioctl,
3553 .listen = sock_no_listen,
3554 .shutdown = sock_no_shutdown,
3555 .setsockopt = sock_no_setsockopt,
3556 .getsockopt = sock_no_getsockopt,
3557 .mmap = sock_no_mmap,
3558 .sendpage = sock_no_sendpage,
3560 /* Now the operations that really occur. */
3561 .release = pfkey_release,
3562 .poll = datagram_poll,
3563 .sendmsg = pfkey_sendmsg,
3564 .recvmsg = pfkey_recvmsg,
3567 static struct net_proto_family pfkey_family_ops = {
3569 .create = pfkey_create,
3570 .owner = THIS_MODULE,
3573 #ifdef CONFIG_PROC_FS
3574 static int pfkey_seq_show(struct seq_file *f, void *v)
3578 s = (struct sock *)v;
3579 if (v == SEQ_START_TOKEN)
3580 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3582 seq_printf(f ,"%p %-6d %-6u %-6u %-6u %-6lu\n",
3584 atomic_read(&s->sk_refcnt),
3585 atomic_read(&s->sk_rmem_alloc),
3586 atomic_read(&s->sk_wmem_alloc),
3593 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3596 struct hlist_node *node;
3599 read_lock(&pfkey_table_lock);
3601 return SEQ_START_TOKEN;
3603 sk_for_each(s, node, &pfkey_table)
3610 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3613 return (v == SEQ_START_TOKEN) ?
3614 sk_head(&pfkey_table) :
3615 sk_next((struct sock *)v);
3618 static void pfkey_seq_stop(struct seq_file *f, void *v)
3620 read_unlock(&pfkey_table_lock);
3623 static struct seq_operations pfkey_seq_ops = {
3624 .start = pfkey_seq_start,
3625 .next = pfkey_seq_next,
3626 .stop = pfkey_seq_stop,
3627 .show = pfkey_seq_show,
3630 static int pfkey_seq_open(struct inode *inode, struct file *file)
3632 return seq_open(file, &pfkey_seq_ops);
3635 static struct file_operations pfkey_proc_ops = {
3636 .open = pfkey_seq_open,
3638 .llseek = seq_lseek,
3639 .release = seq_release,
3642 static int pfkey_init_proc(void)
3644 struct proc_dir_entry *e;
3646 e = proc_net_fops_create(&init_net, "pfkey", 0, &pfkey_proc_ops);
3653 static void pfkey_exit_proc(void)
3655 proc_net_remove(&init_net, "pfkey");
3658 static inline int pfkey_init_proc(void)
3663 static inline void pfkey_exit_proc(void)
3668 static struct xfrm_mgr pfkeyv2_mgr =
3671 .notify = pfkey_send_notify,
3672 .acquire = pfkey_send_acquire,
3673 .compile_policy = pfkey_compile_policy,
3674 .new_mapping = pfkey_send_new_mapping,
3675 .notify_policy = pfkey_send_policy_notify,
3676 .migrate = pfkey_send_migrate,
3679 static void __exit ipsec_pfkey_exit(void)
3681 xfrm_unregister_km(&pfkeyv2_mgr);
3683 sock_unregister(PF_KEY);
3684 proto_unregister(&key_proto);
3687 static int __init ipsec_pfkey_init(void)
3689 int err = proto_register(&key_proto, 0);
3694 err = sock_register(&pfkey_family_ops);
3696 goto out_unregister_key_proto;
3697 err = pfkey_init_proc();
3699 goto out_sock_unregister;
3700 err = xfrm_register_km(&pfkeyv2_mgr);
3702 goto out_remove_proc_entry;
3705 out_remove_proc_entry:
3707 out_sock_unregister:
3708 sock_unregister(PF_KEY);
3709 out_unregister_key_proto:
3710 proto_unregister(&key_proto);
3714 module_init(ipsec_pfkey_init);
3715 module_exit(ipsec_pfkey_exit);
3716 MODULE_LICENSE("GPL");
3717 MODULE_ALIAS_NETPROTO(PF_KEY);