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>
30 #include <linux/audit.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 socket *sock, int protocol)
144 if (!capable(CAP_NET_ADMIN))
146 if (sock->type != SOCK_RAW)
147 return -ESOCKTNOSUPPORT;
148 if (protocol != PF_KEY_V2)
149 return -EPROTONOSUPPORT;
152 sk = sk_alloc(PF_KEY, GFP_KERNEL, &key_proto, 1);
156 sock->ops = &pfkey_ops;
157 sock_init_data(sock, sk);
159 sk->sk_family = PF_KEY;
160 sk->sk_destruct = pfkey_sock_destruct;
162 atomic_inc(&pfkey_socks_nr);
171 static int pfkey_release(struct socket *sock)
173 struct sock *sk = sock->sk;
182 skb_queue_purge(&sk->sk_write_queue);
188 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
189 gfp_t allocation, struct sock *sk)
195 if (atomic_read(&skb->users) != 1) {
196 *skb2 = skb_clone(skb, allocation);
199 atomic_inc(&skb->users);
203 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
205 skb_set_owner_r(*skb2, sk);
206 skb_queue_tail(&sk->sk_receive_queue, *skb2);
207 sk->sk_data_ready(sk, (*skb2)->len);
216 /* Send SKB to all pfkey sockets matching selected criteria. */
217 #define BROADCAST_ALL 0
218 #define BROADCAST_ONE 1
219 #define BROADCAST_REGISTERED 2
220 #define BROADCAST_PROMISC_ONLY 4
221 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
222 int broadcast_flags, struct sock *one_sk)
225 struct hlist_node *node;
226 struct sk_buff *skb2 = NULL;
229 /* XXX Do we need something like netlink_overrun? I think
230 * XXX PF_KEY socket apps will not mind current behavior.
236 sk_for_each(sk, node, &pfkey_table) {
237 struct pfkey_sock *pfk = pfkey_sk(sk);
240 /* Yes, it means that if you are meant to receive this
241 * pfkey message you receive it twice as promiscuous
245 pfkey_broadcast_one(skb, &skb2, allocation, sk);
247 /* the exact target will be processed later */
250 if (broadcast_flags != BROADCAST_ALL) {
251 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
253 if ((broadcast_flags & BROADCAST_REGISTERED) &&
256 if (broadcast_flags & BROADCAST_ONE)
260 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
262 /* Error is cleare after succecful sending to at least one
264 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
267 pfkey_unlock_table();
270 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
278 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
283 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
285 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
286 struct sadb_msg *hdr;
291 /* Woe be to the platform trying to support PFKEY yet
292 * having normal errnos outside the 1-255 range, inclusive.
295 if (err == ERESTARTSYS ||
296 err == ERESTARTNOHAND ||
297 err == ERESTARTNOINTR)
301 BUG_ON(err <= 0 || err >= 256);
303 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
304 pfkey_hdr_dup(hdr, orig);
305 hdr->sadb_msg_errno = (uint8_t) err;
306 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
309 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
314 static u8 sadb_ext_min_len[] = {
315 [SADB_EXT_RESERVED] = (u8) 0,
316 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
317 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
318 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
319 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
320 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
321 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
322 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
323 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
324 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
325 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
326 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
327 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
328 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
329 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
330 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
331 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
332 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
333 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
334 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
335 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
336 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
337 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
338 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
339 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
342 /* Verify sadb_address_{len,prefixlen} against sa_family. */
343 static int verify_address_len(void *p)
345 struct sadb_address *sp = p;
346 struct sockaddr *addr = (struct sockaddr *)(sp + 1);
347 struct sockaddr_in *sin;
348 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
349 struct sockaddr_in6 *sin6;
353 switch (addr->sa_family) {
355 len = sizeof(*sp) + sizeof(*sin) + (sizeof(uint64_t) - 1);
356 len /= sizeof(uint64_t);
357 if (sp->sadb_address_len != len ||
358 sp->sadb_address_prefixlen > 32)
361 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
363 len = sizeof(*sp) + sizeof(*sin6) + (sizeof(uint64_t) - 1);
364 len /= sizeof(uint64_t);
365 if (sp->sadb_address_len != len ||
366 sp->sadb_address_prefixlen > 128)
371 /* It is user using kernel to keep track of security
372 * associations for another protocol, such as
373 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
376 * XXX Actually, association/policy database is not yet
377 * XXX able to cope with arbitrary sockaddr families.
378 * XXX When it can, remove this -EINVAL. -DaveM
387 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
391 len += sizeof(struct sadb_x_sec_ctx);
392 len += sec_ctx->sadb_x_ctx_len;
393 len += sizeof(uint64_t) - 1;
394 len /= sizeof(uint64_t);
399 static inline int verify_sec_ctx_len(void *p)
401 struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
404 if (sec_ctx->sadb_x_ctx_len > PAGE_SIZE)
407 len = pfkey_sec_ctx_len(sec_ctx);
409 if (sec_ctx->sadb_x_sec_len != len)
415 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
417 struct xfrm_user_sec_ctx *uctx = NULL;
418 int ctx_size = sec_ctx->sadb_x_ctx_len;
420 uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
425 uctx->len = pfkey_sec_ctx_len(sec_ctx);
426 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
427 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
428 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
429 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
430 memcpy(uctx + 1, sec_ctx + 1,
436 static int present_and_same_family(struct sadb_address *src,
437 struct sadb_address *dst)
439 struct sockaddr *s_addr, *d_addr;
444 s_addr = (struct sockaddr *)(src + 1);
445 d_addr = (struct sockaddr *)(dst + 1);
446 if (s_addr->sa_family != d_addr->sa_family)
448 if (s_addr->sa_family != AF_INET
449 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
450 && s_addr->sa_family != AF_INET6
458 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
460 char *p = (char *) hdr;
466 struct sadb_ext *ehdr = (struct sadb_ext *) p;
470 ext_len = ehdr->sadb_ext_len;
471 ext_len *= sizeof(uint64_t);
472 ext_type = ehdr->sadb_ext_type;
473 if (ext_len < sizeof(uint64_t) ||
475 ext_type == SADB_EXT_RESERVED)
478 if (ext_type <= SADB_EXT_MAX) {
479 int min = (int) sadb_ext_min_len[ext_type];
482 if (ext_hdrs[ext_type-1] != NULL)
484 if (ext_type == SADB_EXT_ADDRESS_SRC ||
485 ext_type == SADB_EXT_ADDRESS_DST ||
486 ext_type == SADB_EXT_ADDRESS_PROXY ||
487 ext_type == SADB_X_EXT_NAT_T_OA) {
488 if (verify_address_len(p))
491 if (ext_type == SADB_X_EXT_SEC_CTX) {
492 if (verify_sec_ctx_len(p))
495 ext_hdrs[ext_type-1] = p;
505 pfkey_satype2proto(uint8_t satype)
508 case SADB_SATYPE_UNSPEC:
509 return IPSEC_PROTO_ANY;
512 case SADB_SATYPE_ESP:
514 case SADB_X_SATYPE_IPCOMP:
524 pfkey_proto2satype(uint16_t proto)
528 return SADB_SATYPE_AH;
530 return SADB_SATYPE_ESP;
532 return SADB_X_SATYPE_IPCOMP;
540 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
541 * say specifically 'just raw sockets' as we encode them as 255.
544 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
546 return (proto == IPSEC_PROTO_ANY ? 0 : proto);
549 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
551 return (proto ? proto : IPSEC_PROTO_ANY);
554 static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
555 xfrm_address_t *xaddr)
557 switch (((struct sockaddr*)(addr + 1))->sa_family) {
560 ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
562 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
565 &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
566 sizeof(struct in6_addr));
575 static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
578 struct sadb_address *addr;
580 unsigned short family;
581 xfrm_address_t *xaddr;
583 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
587 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
591 /* sadb_address_len should be checked by caller */
592 addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
596 family = ((struct sockaddr *)(addr + 1))->sa_family;
599 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
601 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
603 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
613 return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
616 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
618 pfkey_sockaddr_size(sa_family_t family)
622 return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
623 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
625 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
633 static inline int pfkey_mode_from_xfrm(int mode)
636 case XFRM_MODE_TRANSPORT:
637 return IPSEC_MODE_TRANSPORT;
638 case XFRM_MODE_TUNNEL:
639 return IPSEC_MODE_TUNNEL;
641 return IPSEC_MODE_BEET;
647 static inline int pfkey_mode_to_xfrm(int mode)
650 case IPSEC_MODE_ANY: /*XXX*/
651 case IPSEC_MODE_TRANSPORT:
652 return XFRM_MODE_TRANSPORT;
653 case IPSEC_MODE_TUNNEL:
654 return XFRM_MODE_TUNNEL;
655 case IPSEC_MODE_BEET:
656 return XFRM_MODE_BEET;
662 static struct sk_buff * pfkey_xfrm_state2msg(struct xfrm_state *x, int add_keys, int hsc)
665 struct sadb_msg *hdr;
667 struct sadb_lifetime *lifetime;
668 struct sadb_address *addr;
669 struct sadb_key *key;
670 struct sadb_x_sa2 *sa2;
671 struct sockaddr_in *sin;
672 struct sadb_x_sec_ctx *sec_ctx;
673 struct xfrm_sec_ctx *xfrm_ctx;
675 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
676 struct sockaddr_in6 *sin6;
679 int auth_key_size = 0;
680 int encrypt_key_size = 0;
682 struct xfrm_encap_tmpl *natt = NULL;
685 /* address family check */
686 sockaddr_size = pfkey_sockaddr_size(x->props.family);
688 return ERR_PTR(-EINVAL);
690 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
691 key(AE), (identity(SD),) (sensitivity)> */
692 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
693 sizeof(struct sadb_lifetime) +
694 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
695 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
696 sizeof(struct sadb_address)*2 +
698 sizeof(struct sadb_x_sa2);
700 if ((xfrm_ctx = x->security)) {
701 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
702 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
705 /* identity & sensitivity */
707 if ((x->props.family == AF_INET &&
708 x->sel.saddr.a4 != x->props.saddr.a4)
709 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
710 || (x->props.family == AF_INET6 &&
711 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
714 size += sizeof(struct sadb_address) + sockaddr_size;
717 if (x->aalg && x->aalg->alg_key_len) {
719 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
720 size += sizeof(struct sadb_key) + auth_key_size;
722 if (x->ealg && x->ealg->alg_key_len) {
724 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
725 size += sizeof(struct sadb_key) + encrypt_key_size;
731 if (natt && natt->encap_type) {
732 size += sizeof(struct sadb_x_nat_t_type);
733 size += sizeof(struct sadb_x_nat_t_port);
734 size += sizeof(struct sadb_x_nat_t_port);
737 skb = alloc_skb(size + 16, GFP_ATOMIC);
739 return ERR_PTR(-ENOBUFS);
741 /* call should fill header later */
742 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
743 memset(hdr, 0, size); /* XXX do we need this ? */
744 hdr->sadb_msg_len = size / sizeof(uint64_t);
747 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
748 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
749 sa->sadb_sa_exttype = SADB_EXT_SA;
750 sa->sadb_sa_spi = x->id.spi;
751 sa->sadb_sa_replay = x->props.replay_window;
752 switch (x->km.state) {
753 case XFRM_STATE_VALID:
754 sa->sadb_sa_state = x->km.dying ?
755 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
758 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
761 sa->sadb_sa_state = SADB_SASTATE_DEAD;
764 sa->sadb_sa_auth = 0;
766 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
767 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
769 sa->sadb_sa_encrypt = 0;
770 BUG_ON(x->ealg && x->calg);
772 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
773 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
775 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
777 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
778 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
781 sa->sadb_sa_flags = 0;
782 if (x->props.flags & XFRM_STATE_NOECN)
783 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
784 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
785 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
786 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
787 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
791 lifetime = (struct sadb_lifetime *) skb_put(skb,
792 sizeof(struct sadb_lifetime));
793 lifetime->sadb_lifetime_len =
794 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
795 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
796 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
797 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
798 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
799 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
803 lifetime = (struct sadb_lifetime *) skb_put(skb,
804 sizeof(struct sadb_lifetime));
805 lifetime->sadb_lifetime_len =
806 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
807 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
808 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
809 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
810 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
811 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
814 lifetime = (struct sadb_lifetime *) skb_put(skb,
815 sizeof(struct sadb_lifetime));
816 lifetime->sadb_lifetime_len =
817 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
818 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
819 lifetime->sadb_lifetime_allocations = x->curlft.packets;
820 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
821 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
822 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
824 addr = (struct sadb_address*) skb_put(skb,
825 sizeof(struct sadb_address)+sockaddr_size);
826 addr->sadb_address_len =
827 (sizeof(struct sadb_address)+sockaddr_size)/
829 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
830 /* "if the ports are non-zero, then the sadb_address_proto field,
831 normally zero, MUST be filled in with the transport
832 protocol's number." - RFC2367 */
833 addr->sadb_address_proto = 0;
834 addr->sadb_address_reserved = 0;
835 if (x->props.family == AF_INET) {
836 addr->sadb_address_prefixlen = 32;
838 sin = (struct sockaddr_in *) (addr + 1);
839 sin->sin_family = AF_INET;
840 sin->sin_addr.s_addr = x->props.saddr.a4;
842 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
844 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
845 else if (x->props.family == AF_INET6) {
846 addr->sadb_address_prefixlen = 128;
848 sin6 = (struct sockaddr_in6 *) (addr + 1);
849 sin6->sin6_family = AF_INET6;
851 sin6->sin6_flowinfo = 0;
852 memcpy(&sin6->sin6_addr, x->props.saddr.a6,
853 sizeof(struct in6_addr));
854 sin6->sin6_scope_id = 0;
861 addr = (struct sadb_address*) skb_put(skb,
862 sizeof(struct sadb_address)+sockaddr_size);
863 addr->sadb_address_len =
864 (sizeof(struct sadb_address)+sockaddr_size)/
866 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
867 addr->sadb_address_proto = 0;
868 addr->sadb_address_prefixlen = 32; /* XXX */
869 addr->sadb_address_reserved = 0;
870 if (x->props.family == AF_INET) {
871 sin = (struct sockaddr_in *) (addr + 1);
872 sin->sin_family = AF_INET;
873 sin->sin_addr.s_addr = x->id.daddr.a4;
875 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
877 if (x->sel.saddr.a4 != x->props.saddr.a4) {
878 addr = (struct sadb_address*) skb_put(skb,
879 sizeof(struct sadb_address)+sockaddr_size);
880 addr->sadb_address_len =
881 (sizeof(struct sadb_address)+sockaddr_size)/
883 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
884 addr->sadb_address_proto =
885 pfkey_proto_from_xfrm(x->sel.proto);
886 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
887 addr->sadb_address_reserved = 0;
889 sin = (struct sockaddr_in *) (addr + 1);
890 sin->sin_family = AF_INET;
891 sin->sin_addr.s_addr = x->sel.saddr.a4;
892 sin->sin_port = x->sel.sport;
893 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
896 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
897 else if (x->props.family == AF_INET6) {
898 addr->sadb_address_prefixlen = 128;
900 sin6 = (struct sockaddr_in6 *) (addr + 1);
901 sin6->sin6_family = AF_INET6;
903 sin6->sin6_flowinfo = 0;
904 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
905 sin6->sin6_scope_id = 0;
907 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
908 sizeof(struct in6_addr))) {
909 addr = (struct sadb_address *) skb_put(skb,
910 sizeof(struct sadb_address)+sockaddr_size);
911 addr->sadb_address_len =
912 (sizeof(struct sadb_address)+sockaddr_size)/
914 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
915 addr->sadb_address_proto =
916 pfkey_proto_from_xfrm(x->sel.proto);
917 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
918 addr->sadb_address_reserved = 0;
920 sin6 = (struct sockaddr_in6 *) (addr + 1);
921 sin6->sin6_family = AF_INET6;
922 sin6->sin6_port = x->sel.sport;
923 sin6->sin6_flowinfo = 0;
924 memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
925 sizeof(struct in6_addr));
926 sin6->sin6_scope_id = 0;
934 if (add_keys && auth_key_size) {
935 key = (struct sadb_key *) skb_put(skb,
936 sizeof(struct sadb_key)+auth_key_size);
937 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
939 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
940 key->sadb_key_bits = x->aalg->alg_key_len;
941 key->sadb_key_reserved = 0;
942 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
945 if (add_keys && encrypt_key_size) {
946 key = (struct sadb_key *) skb_put(skb,
947 sizeof(struct sadb_key)+encrypt_key_size);
948 key->sadb_key_len = (sizeof(struct sadb_key) +
949 encrypt_key_size) / sizeof(uint64_t);
950 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
951 key->sadb_key_bits = x->ealg->alg_key_len;
952 key->sadb_key_reserved = 0;
953 memcpy(key + 1, x->ealg->alg_key,
954 (x->ealg->alg_key_len+7)/8);
958 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
959 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
960 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
961 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
963 return ERR_PTR(-EINVAL);
965 sa2->sadb_x_sa2_mode = mode;
966 sa2->sadb_x_sa2_reserved1 = 0;
967 sa2->sadb_x_sa2_reserved2 = 0;
968 sa2->sadb_x_sa2_sequence = 0;
969 sa2->sadb_x_sa2_reqid = x->props.reqid;
971 if (natt && natt->encap_type) {
972 struct sadb_x_nat_t_type *n_type;
973 struct sadb_x_nat_t_port *n_port;
976 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
977 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
978 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
979 n_type->sadb_x_nat_t_type_type = natt->encap_type;
980 n_type->sadb_x_nat_t_type_reserved[0] = 0;
981 n_type->sadb_x_nat_t_type_reserved[1] = 0;
982 n_type->sadb_x_nat_t_type_reserved[2] = 0;
985 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
986 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
987 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
988 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
989 n_port->sadb_x_nat_t_port_reserved = 0;
992 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
993 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
994 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
995 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
996 n_port->sadb_x_nat_t_port_reserved = 0;
999 /* security context */
1001 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
1002 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1003 sec_ctx->sadb_x_sec_len =
1004 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1005 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1006 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1007 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1008 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1009 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1016 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1019 struct xfrm_state *x;
1020 struct sadb_lifetime *lifetime;
1022 struct sadb_key *key;
1023 struct sadb_x_sec_ctx *sec_ctx;
1028 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1030 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1031 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1032 return ERR_PTR(-EINVAL);
1033 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1034 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1035 return ERR_PTR(-EINVAL);
1036 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1037 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1038 return ERR_PTR(-EINVAL);
1039 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1040 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1041 return ERR_PTR(-EINVAL);
1043 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1045 return ERR_PTR(-EINVAL);
1047 /* default error is no buffer space */
1052 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1053 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1054 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1055 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1056 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1059 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1060 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1062 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1063 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1064 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1065 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1066 return ERR_PTR(-EINVAL);
1067 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1069 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1070 ((key->sadb_key_bits+7) / 8 == 0 ||
1071 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1072 return ERR_PTR(-EINVAL);
1073 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1075 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1076 ((key->sadb_key_bits+7) / 8 == 0 ||
1077 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1078 return ERR_PTR(-EINVAL);
1080 x = xfrm_state_alloc();
1082 return ERR_PTR(-ENOBUFS);
1084 x->id.proto = proto;
1085 x->id.spi = sa->sadb_sa_spi;
1086 x->props.replay_window = sa->sadb_sa_replay;
1087 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1088 x->props.flags |= XFRM_STATE_NOECN;
1089 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1090 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1091 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1092 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1094 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1095 if (lifetime != NULL) {
1096 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1097 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1098 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1099 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1101 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1102 if (lifetime != NULL) {
1103 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1104 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1105 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1106 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1109 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1110 if (sec_ctx != NULL) {
1111 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1116 err = security_xfrm_state_alloc(x, uctx);
1123 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1124 if (sa->sadb_sa_auth) {
1126 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1132 keysize = (key->sadb_key_bits + 7) / 8;
1133 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1136 strcpy(x->aalg->alg_name, a->name);
1137 x->aalg->alg_key_len = 0;
1139 x->aalg->alg_key_len = key->sadb_key_bits;
1140 memcpy(x->aalg->alg_key, key+1, keysize);
1142 x->props.aalgo = sa->sadb_sa_auth;
1143 /* x->algo.flags = sa->sadb_sa_flags; */
1145 if (sa->sadb_sa_encrypt) {
1146 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1147 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1152 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1155 strcpy(x->calg->alg_name, a->name);
1156 x->props.calgo = sa->sadb_sa_encrypt;
1159 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1164 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1166 keysize = (key->sadb_key_bits + 7) / 8;
1167 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1170 strcpy(x->ealg->alg_name, a->name);
1171 x->ealg->alg_key_len = 0;
1173 x->ealg->alg_key_len = key->sadb_key_bits;
1174 memcpy(x->ealg->alg_key, key+1, keysize);
1176 x->props.ealgo = sa->sadb_sa_encrypt;
1179 /* x->algo.flags = sa->sadb_sa_flags; */
1181 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1183 if (!x->props.family) {
1184 err = -EAFNOSUPPORT;
1187 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1190 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1191 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1192 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1197 x->props.mode = mode;
1198 x->props.reqid = sa2->sadb_x_sa2_reqid;
1201 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1202 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1204 /* Nobody uses this, but we try. */
1205 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1206 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1209 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1210 struct sadb_x_nat_t_type* n_type;
1211 struct xfrm_encap_tmpl *natt;
1213 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1218 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1219 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1221 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1222 struct sadb_x_nat_t_port* n_port =
1223 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1224 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1226 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1227 struct sadb_x_nat_t_port* n_port =
1228 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1229 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1233 err = xfrm_init_state(x);
1237 x->km.seq = hdr->sadb_msg_seq;
1241 x->km.state = XFRM_STATE_DEAD;
1243 return ERR_PTR(err);
1246 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1251 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1253 struct sk_buff *resp_skb;
1254 struct sadb_x_sa2 *sa2;
1255 struct sadb_address *saddr, *daddr;
1256 struct sadb_msg *out_hdr;
1257 struct xfrm_state *x = NULL;
1261 unsigned short family;
1262 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1264 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1265 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1268 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1272 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1273 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1276 reqid = sa2->sadb_x_sa2_reqid;
1282 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1283 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1285 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1288 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1289 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1291 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1293 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1294 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1299 if (hdr->sadb_msg_seq) {
1300 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1301 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1308 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1313 resp_skb = ERR_PTR(-ENOENT);
1315 spin_lock_bh(&x->lock);
1316 if (x->km.state != XFRM_STATE_DEAD) {
1317 struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1318 u32 min_spi, max_spi;
1320 if (range != NULL) {
1321 min_spi = range->sadb_spirange_min;
1322 max_spi = range->sadb_spirange_max;
1325 max_spi = 0x0fffffff;
1327 xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi));
1329 resp_skb = pfkey_xfrm_state2msg(x, 0, 3);
1331 spin_unlock_bh(&x->lock);
1333 if (IS_ERR(resp_skb)) {
1335 return PTR_ERR(resp_skb);
1338 out_hdr = (struct sadb_msg *) resp_skb->data;
1339 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1340 out_hdr->sadb_msg_type = SADB_GETSPI;
1341 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1342 out_hdr->sadb_msg_errno = 0;
1343 out_hdr->sadb_msg_reserved = 0;
1344 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1345 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1349 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1354 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1356 struct xfrm_state *x;
1358 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1361 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1364 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1368 spin_lock_bh(&x->lock);
1369 if (x->km.state == XFRM_STATE_ACQ) {
1370 x->km.state = XFRM_STATE_ERROR;
1373 spin_unlock_bh(&x->lock);
1378 static inline int event2poltype(int event)
1381 case XFRM_MSG_DELPOLICY:
1382 return SADB_X_SPDDELETE;
1383 case XFRM_MSG_NEWPOLICY:
1384 return SADB_X_SPDADD;
1385 case XFRM_MSG_UPDPOLICY:
1386 return SADB_X_SPDUPDATE;
1387 case XFRM_MSG_POLEXPIRE:
1388 // return SADB_X_SPDEXPIRE;
1390 printk("pfkey: Unknown policy event %d\n", event);
1397 static inline int event2keytype(int event)
1400 case XFRM_MSG_DELSA:
1402 case XFRM_MSG_NEWSA:
1404 case XFRM_MSG_UPDSA:
1406 case XFRM_MSG_EXPIRE:
1409 printk("pfkey: Unknown SA event %d\n", event);
1417 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1419 struct sk_buff *skb;
1420 struct sadb_msg *hdr;
1423 if (c->event == XFRM_MSG_DELSA)
1426 skb = pfkey_xfrm_state2msg(x, 0, hsc);
1429 return PTR_ERR(skb);
1431 hdr = (struct sadb_msg *) skb->data;
1432 hdr->sadb_msg_version = PF_KEY_V2;
1433 hdr->sadb_msg_type = event2keytype(c->event);
1434 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1435 hdr->sadb_msg_errno = 0;
1436 hdr->sadb_msg_reserved = 0;
1437 hdr->sadb_msg_seq = c->seq;
1438 hdr->sadb_msg_pid = c->pid;
1440 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1445 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1447 struct xfrm_state *x;
1451 x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1456 if (hdr->sadb_msg_type == SADB_ADD)
1457 err = xfrm_state_add(x);
1459 err = xfrm_state_update(x);
1461 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
1462 AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x);
1465 x->km.state = XFRM_STATE_DEAD;
1466 __xfrm_state_put(x);
1470 if (hdr->sadb_msg_type == SADB_ADD)
1471 c.event = XFRM_MSG_NEWSA;
1473 c.event = XFRM_MSG_UPDSA;
1474 c.seq = hdr->sadb_msg_seq;
1475 c.pid = hdr->sadb_msg_pid;
1476 km_state_notify(x, &c);
1482 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1484 struct xfrm_state *x;
1488 if (!ext_hdrs[SADB_EXT_SA-1] ||
1489 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1490 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1493 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1497 if ((err = security_xfrm_state_delete(x)))
1500 if (xfrm_state_kern(x)) {
1505 err = xfrm_state_delete(x);
1510 c.seq = hdr->sadb_msg_seq;
1511 c.pid = hdr->sadb_msg_pid;
1512 c.event = XFRM_MSG_DELSA;
1513 km_state_notify(x, &c);
1515 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
1516 AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x);
1522 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1525 struct sk_buff *out_skb;
1526 struct sadb_msg *out_hdr;
1527 struct xfrm_state *x;
1529 if (!ext_hdrs[SADB_EXT_SA-1] ||
1530 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1531 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1534 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1538 out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1539 proto = x->id.proto;
1541 if (IS_ERR(out_skb))
1542 return PTR_ERR(out_skb);
1544 out_hdr = (struct sadb_msg *) out_skb->data;
1545 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1546 out_hdr->sadb_msg_type = SADB_DUMP;
1547 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1548 out_hdr->sadb_msg_errno = 0;
1549 out_hdr->sadb_msg_reserved = 0;
1550 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1551 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1552 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1557 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1560 struct sk_buff *skb;
1561 struct sadb_msg *hdr;
1562 int len, auth_len, enc_len, i;
1564 auth_len = xfrm_count_auth_supported();
1566 auth_len *= sizeof(struct sadb_alg);
1567 auth_len += sizeof(struct sadb_supported);
1570 enc_len = xfrm_count_enc_supported();
1572 enc_len *= sizeof(struct sadb_alg);
1573 enc_len += sizeof(struct sadb_supported);
1576 len = enc_len + auth_len + sizeof(struct sadb_msg);
1578 skb = alloc_skb(len + 16, allocation);
1582 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1583 pfkey_hdr_dup(hdr, orig);
1584 hdr->sadb_msg_errno = 0;
1585 hdr->sadb_msg_len = len / sizeof(uint64_t);
1588 struct sadb_supported *sp;
1589 struct sadb_alg *ap;
1591 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1592 ap = (struct sadb_alg *) (sp + 1);
1594 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1595 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1597 for (i = 0; ; i++) {
1598 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1601 if (aalg->available)
1607 struct sadb_supported *sp;
1608 struct sadb_alg *ap;
1610 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1611 ap = (struct sadb_alg *) (sp + 1);
1613 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1614 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1616 for (i = 0; ; i++) {
1617 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1620 if (ealg->available)
1629 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1631 struct pfkey_sock *pfk = pfkey_sk(sk);
1632 struct sk_buff *supp_skb;
1634 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1637 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1638 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1640 pfk->registered |= (1<<hdr->sadb_msg_satype);
1645 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1647 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1648 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1653 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1658 static int key_notify_sa_flush(struct km_event *c)
1660 struct sk_buff *skb;
1661 struct sadb_msg *hdr;
1663 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1666 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1667 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1668 hdr->sadb_msg_type = SADB_FLUSH;
1669 hdr->sadb_msg_seq = c->seq;
1670 hdr->sadb_msg_pid = c->pid;
1671 hdr->sadb_msg_version = PF_KEY_V2;
1672 hdr->sadb_msg_errno = (uint8_t) 0;
1673 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1675 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1680 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1684 struct xfrm_audit audit_info;
1687 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1691 audit_info.loginuid = audit_get_loginuid(current->audit_context);
1692 audit_info.secid = 0;
1693 err = xfrm_state_flush(proto, &audit_info);
1696 c.data.proto = proto;
1697 c.seq = hdr->sadb_msg_seq;
1698 c.pid = hdr->sadb_msg_pid;
1699 c.event = XFRM_MSG_FLUSHSA;
1700 km_state_notify(NULL, &c);
1705 struct pfkey_dump_data
1707 struct sk_buff *skb;
1708 struct sadb_msg *hdr;
1712 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1714 struct pfkey_dump_data *data = ptr;
1715 struct sk_buff *out_skb;
1716 struct sadb_msg *out_hdr;
1718 out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1719 if (IS_ERR(out_skb))
1720 return PTR_ERR(out_skb);
1722 out_hdr = (struct sadb_msg *) out_skb->data;
1723 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1724 out_hdr->sadb_msg_type = SADB_DUMP;
1725 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1726 out_hdr->sadb_msg_errno = 0;
1727 out_hdr->sadb_msg_reserved = 0;
1728 out_hdr->sadb_msg_seq = count;
1729 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1730 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1734 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1737 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1739 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1743 return xfrm_state_walk(proto, dump_sa, &data);
1746 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1748 struct pfkey_sock *pfk = pfkey_sk(sk);
1749 int satype = hdr->sadb_msg_satype;
1751 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1752 /* XXX we mangle packet... */
1753 hdr->sadb_msg_errno = 0;
1754 if (satype != 0 && satype != 1)
1756 pfk->promisc = satype;
1758 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1762 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1765 u32 reqid = *(u32*)ptr;
1767 for (i=0; i<xp->xfrm_nr; i++) {
1768 if (xp->xfrm_vec[i].reqid == reqid)
1774 static u32 gen_reqid(void)
1777 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1783 reqid = IPSEC_MANUAL_REQID_MAX+1;
1784 if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid,
1785 (void*)&reqid) != -EEXIST)
1787 } while (reqid != start);
1792 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1794 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1795 struct sockaddr_in *sin;
1796 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1797 struct sockaddr_in6 *sin6;
1801 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1804 if (rq->sadb_x_ipsecrequest_mode == 0)
1807 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1808 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1811 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1813 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1814 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1815 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1817 if (!t->reqid && !(t->reqid = gen_reqid()))
1821 /* addresses present only in tunnel mode */
1822 if (t->mode == XFRM_MODE_TUNNEL) {
1823 struct sockaddr *sa;
1824 sa = (struct sockaddr *)(rq+1);
1825 switch(sa->sa_family) {
1827 sin = (struct sockaddr_in*)sa;
1828 t->saddr.a4 = sin->sin_addr.s_addr;
1830 if (sin->sin_family != AF_INET)
1832 t->id.daddr.a4 = sin->sin_addr.s_addr;
1834 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1836 sin6 = (struct sockaddr_in6*)sa;
1837 memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1839 if (sin6->sin6_family != AF_INET6)
1841 memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1847 t->encap_family = sa->sa_family;
1849 t->encap_family = xp->family;
1851 /* No way to set this via kame pfkey */
1852 t->aalgos = t->ealgos = t->calgos = ~0;
1858 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1861 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1862 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1864 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1865 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1867 len -= rq->sadb_x_ipsecrequest_len;
1868 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1873 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1875 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1878 int len = sizeof(struct sadb_x_sec_ctx);
1879 len += xfrm_ctx->ctx_len;
1880 return PFKEY_ALIGN8(len);
1885 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1887 struct xfrm_tmpl *t;
1888 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1892 for (i=0; i<xp->xfrm_nr; i++) {
1893 t = xp->xfrm_vec + i;
1894 socklen += (t->encap_family == AF_INET ?
1895 sizeof(struct sockaddr_in) :
1896 sizeof(struct sockaddr_in6));
1899 return sizeof(struct sadb_msg) +
1900 (sizeof(struct sadb_lifetime) * 3) +
1901 (sizeof(struct sadb_address) * 2) +
1902 (sockaddr_size * 2) +
1903 sizeof(struct sadb_x_policy) +
1904 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1906 pfkey_xfrm_policy2sec_ctx_size(xp);
1909 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1911 struct sk_buff *skb;
1914 size = pfkey_xfrm_policy2msg_size(xp);
1916 skb = alloc_skb(size + 16, GFP_ATOMIC);
1918 return ERR_PTR(-ENOBUFS);
1923 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1925 struct sadb_msg *hdr;
1926 struct sadb_address *addr;
1927 struct sadb_lifetime *lifetime;
1928 struct sadb_x_policy *pol;
1929 struct sockaddr_in *sin;
1930 struct sadb_x_sec_ctx *sec_ctx;
1931 struct xfrm_sec_ctx *xfrm_ctx;
1932 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1933 struct sockaddr_in6 *sin6;
1937 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1938 int socklen = (xp->family == AF_INET ?
1939 sizeof(struct sockaddr_in) :
1940 sizeof(struct sockaddr_in6));
1942 size = pfkey_xfrm_policy2msg_size(xp);
1944 /* call should fill header later */
1945 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1946 memset(hdr, 0, size); /* XXX do we need this ? */
1949 addr = (struct sadb_address*) skb_put(skb,
1950 sizeof(struct sadb_address)+sockaddr_size);
1951 addr->sadb_address_len =
1952 (sizeof(struct sadb_address)+sockaddr_size)/
1954 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1955 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1956 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1957 addr->sadb_address_reserved = 0;
1959 if (xp->family == AF_INET) {
1960 sin = (struct sockaddr_in *) (addr + 1);
1961 sin->sin_family = AF_INET;
1962 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1963 sin->sin_port = xp->selector.sport;
1964 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1966 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1967 else if (xp->family == AF_INET6) {
1968 sin6 = (struct sockaddr_in6 *) (addr + 1);
1969 sin6->sin6_family = AF_INET6;
1970 sin6->sin6_port = xp->selector.sport;
1971 sin6->sin6_flowinfo = 0;
1972 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1973 sizeof(struct in6_addr));
1974 sin6->sin6_scope_id = 0;
1981 addr = (struct sadb_address*) skb_put(skb,
1982 sizeof(struct sadb_address)+sockaddr_size);
1983 addr->sadb_address_len =
1984 (sizeof(struct sadb_address)+sockaddr_size)/
1986 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1987 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1988 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1989 addr->sadb_address_reserved = 0;
1990 if (xp->family == AF_INET) {
1991 sin = (struct sockaddr_in *) (addr + 1);
1992 sin->sin_family = AF_INET;
1993 sin->sin_addr.s_addr = xp->selector.daddr.a4;
1994 sin->sin_port = xp->selector.dport;
1995 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1997 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1998 else if (xp->family == AF_INET6) {
1999 sin6 = (struct sockaddr_in6 *) (addr + 1);
2000 sin6->sin6_family = AF_INET6;
2001 sin6->sin6_port = xp->selector.dport;
2002 sin6->sin6_flowinfo = 0;
2003 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2004 sizeof(struct in6_addr));
2005 sin6->sin6_scope_id = 0;
2012 lifetime = (struct sadb_lifetime *) skb_put(skb,
2013 sizeof(struct sadb_lifetime));
2014 lifetime->sadb_lifetime_len =
2015 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2016 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2017 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2018 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2019 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2020 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2022 lifetime = (struct sadb_lifetime *) skb_put(skb,
2023 sizeof(struct sadb_lifetime));
2024 lifetime->sadb_lifetime_len =
2025 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2026 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2027 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2028 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2029 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2030 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2032 lifetime = (struct sadb_lifetime *) skb_put(skb,
2033 sizeof(struct sadb_lifetime));
2034 lifetime->sadb_lifetime_len =
2035 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2036 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2037 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2038 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2039 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2040 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2042 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2043 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2044 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2045 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2046 if (xp->action == XFRM_POLICY_ALLOW) {
2048 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2050 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2052 pol->sadb_x_policy_dir = dir+1;
2053 pol->sadb_x_policy_id = xp->index;
2054 pol->sadb_x_policy_priority = xp->priority;
2056 for (i=0; i<xp->xfrm_nr; i++) {
2057 struct sadb_x_ipsecrequest *rq;
2058 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2062 req_size = sizeof(struct sadb_x_ipsecrequest);
2063 if (t->mode == XFRM_MODE_TUNNEL)
2064 req_size += ((t->encap_family == AF_INET ?
2065 sizeof(struct sockaddr_in) :
2066 sizeof(struct sockaddr_in6)) * 2);
2069 rq = (void*)skb_put(skb, req_size);
2070 pol->sadb_x_policy_len += req_size/8;
2071 memset(rq, 0, sizeof(*rq));
2072 rq->sadb_x_ipsecrequest_len = req_size;
2073 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2074 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2076 rq->sadb_x_ipsecrequest_mode = mode;
2077 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2079 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2081 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2082 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2083 if (t->mode == XFRM_MODE_TUNNEL) {
2084 switch (t->encap_family) {
2086 sin = (void*)(rq+1);
2087 sin->sin_family = AF_INET;
2088 sin->sin_addr.s_addr = t->saddr.a4;
2090 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2092 sin->sin_family = AF_INET;
2093 sin->sin_addr.s_addr = t->id.daddr.a4;
2095 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2097 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2099 sin6 = (void*)(rq+1);
2100 sin6->sin6_family = AF_INET6;
2101 sin6->sin6_port = 0;
2102 sin6->sin6_flowinfo = 0;
2103 memcpy(&sin6->sin6_addr, t->saddr.a6,
2104 sizeof(struct in6_addr));
2105 sin6->sin6_scope_id = 0;
2108 sin6->sin6_family = AF_INET6;
2109 sin6->sin6_port = 0;
2110 sin6->sin6_flowinfo = 0;
2111 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2112 sizeof(struct in6_addr));
2113 sin6->sin6_scope_id = 0;
2122 /* security context */
2123 if ((xfrm_ctx = xp->security)) {
2124 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2126 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2127 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2128 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2129 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2130 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2131 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2132 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2136 hdr->sadb_msg_len = size / sizeof(uint64_t);
2137 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2142 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2144 struct sk_buff *out_skb;
2145 struct sadb_msg *out_hdr;
2148 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2149 if (IS_ERR(out_skb)) {
2150 err = PTR_ERR(out_skb);
2153 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2157 out_hdr = (struct sadb_msg *) out_skb->data;
2158 out_hdr->sadb_msg_version = PF_KEY_V2;
2160 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2161 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2163 out_hdr->sadb_msg_type = event2poltype(c->event);
2164 out_hdr->sadb_msg_errno = 0;
2165 out_hdr->sadb_msg_seq = c->seq;
2166 out_hdr->sadb_msg_pid = c->pid;
2167 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2173 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2176 struct sadb_lifetime *lifetime;
2177 struct sadb_address *sa;
2178 struct sadb_x_policy *pol;
2179 struct xfrm_policy *xp;
2181 struct sadb_x_sec_ctx *sec_ctx;
2183 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2184 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2185 !ext_hdrs[SADB_X_EXT_POLICY-1])
2188 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2189 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2191 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2194 xp = xfrm_policy_alloc(GFP_KERNEL);
2198 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2199 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2200 xp->priority = pol->sadb_x_policy_priority;
2202 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2203 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2208 xp->selector.family = xp->family;
2209 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2210 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2211 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2212 if (xp->selector.sport)
2213 xp->selector.sport_mask = htons(0xffff);
2215 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2216 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2217 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2219 /* Amusing, we set this twice. KAME apps appear to set same value
2220 * in both addresses.
2222 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2224 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2225 if (xp->selector.dport)
2226 xp->selector.dport_mask = htons(0xffff);
2228 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2229 if (sec_ctx != NULL) {
2230 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2237 err = security_xfrm_policy_alloc(xp, uctx);
2244 xp->lft.soft_byte_limit = XFRM_INF;
2245 xp->lft.hard_byte_limit = XFRM_INF;
2246 xp->lft.soft_packet_limit = XFRM_INF;
2247 xp->lft.hard_packet_limit = XFRM_INF;
2248 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2249 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2250 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2251 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2252 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2254 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2255 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2256 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2257 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2258 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2261 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2262 (err = parse_ipsecrequests(xp, pol)) < 0)
2265 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2266 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2268 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2269 AUDIT_MAC_IPSEC_ADDSPD, err ? 0 : 1, xp, NULL);
2274 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2275 c.event = XFRM_MSG_UPDPOLICY;
2277 c.event = XFRM_MSG_NEWPOLICY;
2279 c.seq = hdr->sadb_msg_seq;
2280 c.pid = hdr->sadb_msg_pid;
2282 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2287 security_xfrm_policy_free(xp);
2292 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2295 struct sadb_address *sa;
2296 struct sadb_x_policy *pol;
2297 struct xfrm_policy *xp, tmp;
2298 struct xfrm_selector sel;
2300 struct sadb_x_sec_ctx *sec_ctx;
2302 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2303 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2304 !ext_hdrs[SADB_X_EXT_POLICY-1])
2307 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2308 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2311 memset(&sel, 0, sizeof(sel));
2313 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2314 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2315 sel.prefixlen_s = sa->sadb_address_prefixlen;
2316 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2317 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2319 sel.sport_mask = htons(0xffff);
2321 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2322 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2323 sel.prefixlen_d = sa->sadb_address_prefixlen;
2324 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2325 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2327 sel.dport_mask = htons(0xffff);
2329 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2330 memset(&tmp, 0, sizeof(struct xfrm_policy));
2332 if (sec_ctx != NULL) {
2333 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2338 err = security_xfrm_policy_alloc(&tmp, uctx);
2345 xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
2346 &sel, tmp.security, 1, &err);
2347 security_xfrm_policy_free(&tmp);
2352 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2353 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
2358 c.seq = hdr->sadb_msg_seq;
2359 c.pid = hdr->sadb_msg_pid;
2360 c.event = XFRM_MSG_DELPOLICY;
2361 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2368 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2371 struct sk_buff *out_skb;
2372 struct sadb_msg *out_hdr;
2375 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2376 if (IS_ERR(out_skb)) {
2377 err = PTR_ERR(out_skb);
2380 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2384 out_hdr = (struct sadb_msg *) out_skb->data;
2385 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2386 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2387 out_hdr->sadb_msg_satype = 0;
2388 out_hdr->sadb_msg_errno = 0;
2389 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2390 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2391 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2398 #ifdef CONFIG_NET_KEY_MIGRATE
2399 static int pfkey_sockaddr_pair_size(sa_family_t family)
2403 return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2404 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2406 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2414 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2415 xfrm_address_t *saddr, xfrm_address_t *daddr,
2418 struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2419 if (rq->sadb_x_ipsecrequest_len <
2420 pfkey_sockaddr_pair_size(sa->sa_family))
2423 switch (sa->sa_family) {
2426 struct sockaddr_in *sin;
2427 sin = (struct sockaddr_in *)sa;
2428 if ((sin+1)->sin_family != AF_INET)
2430 memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2432 memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2436 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2439 struct sockaddr_in6 *sin6;
2440 sin6 = (struct sockaddr_in6 *)sa;
2441 if ((sin6+1)->sin6_family != AF_INET6)
2443 memcpy(&saddr->a6, &sin6->sin6_addr,
2446 memcpy(&daddr->a6, &sin6->sin6_addr,
2459 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2460 struct xfrm_migrate *m)
2463 struct sadb_x_ipsecrequest *rq2;
2466 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2467 len < rq1->sadb_x_ipsecrequest_len)
2471 err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2476 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2477 len -= rq1->sadb_x_ipsecrequest_len;
2479 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2480 len < rq2->sadb_x_ipsecrequest_len)
2484 err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2489 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2490 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2491 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2494 m->proto = rq1->sadb_x_ipsecrequest_proto;
2495 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2498 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2500 return ((int)(rq1->sadb_x_ipsecrequest_len +
2501 rq2->sadb_x_ipsecrequest_len));
2504 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2505 struct sadb_msg *hdr, void **ext_hdrs)
2507 int i, len, ret, err = -EINVAL;
2509 struct sadb_address *sa;
2510 struct sadb_x_policy *pol;
2511 struct sadb_x_ipsecrequest *rq;
2512 struct xfrm_selector sel;
2513 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2515 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2516 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2517 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2522 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2528 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2533 dir = pol->sadb_x_policy_dir - 1;
2534 memset(&sel, 0, sizeof(sel));
2536 /* set source address info of selector */
2537 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2538 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2539 sel.prefixlen_s = sa->sadb_address_prefixlen;
2540 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2541 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2543 sel.sport_mask = ~0;
2545 /* set destination address info of selector */
2546 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2547 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2548 sel.prefixlen_d = sa->sadb_address_prefixlen;
2549 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2550 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2552 sel.dport_mask = ~0;
2554 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2556 /* extract ipsecrequests */
2558 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2560 while (len > 0 && i < XFRM_MAX_DEPTH) {
2561 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2566 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2572 if (!i || len > 0) {
2577 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2583 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2584 struct sadb_msg *hdr, void **ext_hdrs)
2586 return -ENOPROTOOPT;
2591 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2594 int err = 0, delete;
2595 struct sadb_x_policy *pol;
2596 struct xfrm_policy *xp;
2599 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2602 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2603 if (dir >= XFRM_POLICY_MAX)
2606 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2607 xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2613 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2614 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
2618 c.seq = hdr->sadb_msg_seq;
2619 c.pid = hdr->sadb_msg_pid;
2621 c.event = XFRM_MSG_DELPOLICY;
2622 km_policy_notify(xp, dir, &c);
2624 err = key_pol_get_resp(sk, xp, hdr, dir);
2632 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2634 struct pfkey_dump_data *data = ptr;
2635 struct sk_buff *out_skb;
2636 struct sadb_msg *out_hdr;
2639 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2640 if (IS_ERR(out_skb))
2641 return PTR_ERR(out_skb);
2643 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2647 out_hdr = (struct sadb_msg *) out_skb->data;
2648 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2649 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2650 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2651 out_hdr->sadb_msg_errno = 0;
2652 out_hdr->sadb_msg_seq = count;
2653 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2654 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2658 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2660 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2662 return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data);
2665 static int key_notify_policy_flush(struct km_event *c)
2667 struct sk_buff *skb_out;
2668 struct sadb_msg *hdr;
2670 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2673 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2674 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2675 hdr->sadb_msg_seq = c->seq;
2676 hdr->sadb_msg_pid = c->pid;
2677 hdr->sadb_msg_version = PF_KEY_V2;
2678 hdr->sadb_msg_errno = (uint8_t) 0;
2679 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2680 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2685 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2688 struct xfrm_audit audit_info;
2691 audit_info.loginuid = audit_get_loginuid(current->audit_context);
2692 audit_info.secid = 0;
2693 err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2696 c.data.type = XFRM_POLICY_TYPE_MAIN;
2697 c.event = XFRM_MSG_FLUSHPOLICY;
2698 c.pid = hdr->sadb_msg_pid;
2699 c.seq = hdr->sadb_msg_seq;
2700 km_policy_notify(NULL, 0, &c);
2705 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2706 struct sadb_msg *hdr, void **ext_hdrs);
2707 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2708 [SADB_RESERVED] = pfkey_reserved,
2709 [SADB_GETSPI] = pfkey_getspi,
2710 [SADB_UPDATE] = pfkey_add,
2711 [SADB_ADD] = pfkey_add,
2712 [SADB_DELETE] = pfkey_delete,
2713 [SADB_GET] = pfkey_get,
2714 [SADB_ACQUIRE] = pfkey_acquire,
2715 [SADB_REGISTER] = pfkey_register,
2716 [SADB_EXPIRE] = NULL,
2717 [SADB_FLUSH] = pfkey_flush,
2718 [SADB_DUMP] = pfkey_dump,
2719 [SADB_X_PROMISC] = pfkey_promisc,
2720 [SADB_X_PCHANGE] = NULL,
2721 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2722 [SADB_X_SPDADD] = pfkey_spdadd,
2723 [SADB_X_SPDDELETE] = pfkey_spddelete,
2724 [SADB_X_SPDGET] = pfkey_spdget,
2725 [SADB_X_SPDACQUIRE] = NULL,
2726 [SADB_X_SPDDUMP] = pfkey_spddump,
2727 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2728 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2729 [SADB_X_SPDDELETE2] = pfkey_spdget,
2730 [SADB_X_MIGRATE] = pfkey_migrate,
2733 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2735 void *ext_hdrs[SADB_EXT_MAX];
2738 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2739 BROADCAST_PROMISC_ONLY, NULL);
2741 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2742 err = parse_exthdrs(skb, hdr, ext_hdrs);
2745 if (pfkey_funcs[hdr->sadb_msg_type])
2746 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2751 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2753 struct sadb_msg *hdr = NULL;
2755 if (skb->len < sizeof(*hdr)) {
2758 hdr = (struct sadb_msg *) skb->data;
2759 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2760 hdr->sadb_msg_reserved != 0 ||
2761 (hdr->sadb_msg_type <= SADB_RESERVED ||
2762 hdr->sadb_msg_type > SADB_MAX)) {
2765 } else if (hdr->sadb_msg_len != (skb->len /
2766 sizeof(uint64_t)) ||
2767 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2768 sizeof(uint64_t))) {
2778 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2780 return t->aalgos & (1 << d->desc.sadb_alg_id);
2783 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2785 return t->ealgos & (1 << d->desc.sadb_alg_id);
2788 static int count_ah_combs(struct xfrm_tmpl *t)
2792 for (i = 0; ; i++) {
2793 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2796 if (aalg_tmpl_set(t, aalg) && aalg->available)
2797 sz += sizeof(struct sadb_comb);
2799 return sz + sizeof(struct sadb_prop);
2802 static int count_esp_combs(struct xfrm_tmpl *t)
2806 for (i = 0; ; i++) {
2807 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2811 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2814 for (k = 1; ; k++) {
2815 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2819 if (aalg_tmpl_set(t, aalg) && aalg->available)
2820 sz += sizeof(struct sadb_comb);
2823 return sz + sizeof(struct sadb_prop);
2826 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2828 struct sadb_prop *p;
2831 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2832 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2833 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2834 p->sadb_prop_replay = 32;
2835 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2837 for (i = 0; ; i++) {
2838 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2842 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2843 struct sadb_comb *c;
2844 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2845 memset(c, 0, sizeof(*c));
2846 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2847 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2848 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2849 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2850 c->sadb_comb_hard_addtime = 24*60*60;
2851 c->sadb_comb_soft_addtime = 20*60*60;
2852 c->sadb_comb_hard_usetime = 8*60*60;
2853 c->sadb_comb_soft_usetime = 7*60*60;
2858 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2860 struct sadb_prop *p;
2863 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2864 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2865 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2866 p->sadb_prop_replay = 32;
2867 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2870 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2874 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2877 for (k = 1; ; k++) {
2878 struct sadb_comb *c;
2879 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2882 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2884 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2885 memset(c, 0, sizeof(*c));
2886 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2887 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2888 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2889 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2890 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2891 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2892 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2893 c->sadb_comb_hard_addtime = 24*60*60;
2894 c->sadb_comb_soft_addtime = 20*60*60;
2895 c->sadb_comb_hard_usetime = 8*60*60;
2896 c->sadb_comb_soft_usetime = 7*60*60;
2901 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2906 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2908 struct sk_buff *out_skb;
2909 struct sadb_msg *out_hdr;
2913 hard = c->data.hard;
2919 out_skb = pfkey_xfrm_state2msg(x, 0, hsc);
2920 if (IS_ERR(out_skb))
2921 return PTR_ERR(out_skb);
2923 out_hdr = (struct sadb_msg *) out_skb->data;
2924 out_hdr->sadb_msg_version = PF_KEY_V2;
2925 out_hdr->sadb_msg_type = SADB_EXPIRE;
2926 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2927 out_hdr->sadb_msg_errno = 0;
2928 out_hdr->sadb_msg_reserved = 0;
2929 out_hdr->sadb_msg_seq = 0;
2930 out_hdr->sadb_msg_pid = 0;
2932 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2936 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2939 case XFRM_MSG_EXPIRE:
2940 return key_notify_sa_expire(x, c);
2941 case XFRM_MSG_DELSA:
2942 case XFRM_MSG_NEWSA:
2943 case XFRM_MSG_UPDSA:
2944 return key_notify_sa(x, c);
2945 case XFRM_MSG_FLUSHSA:
2946 return key_notify_sa_flush(c);
2947 case XFRM_MSG_NEWAE: /* not yet supported */
2950 printk("pfkey: Unknown SA event %d\n", c->event);
2957 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2959 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2963 case XFRM_MSG_POLEXPIRE:
2964 return key_notify_policy_expire(xp, c);
2965 case XFRM_MSG_DELPOLICY:
2966 case XFRM_MSG_NEWPOLICY:
2967 case XFRM_MSG_UPDPOLICY:
2968 return key_notify_policy(xp, dir, c);
2969 case XFRM_MSG_FLUSHPOLICY:
2970 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2972 return key_notify_policy_flush(c);
2974 printk("pfkey: Unknown policy event %d\n", c->event);
2981 static u32 get_acqseq(void)
2985 static DEFINE_SPINLOCK(acqseq_lock);
2987 spin_lock_bh(&acqseq_lock);
2988 res = (++acqseq ? : ++acqseq);
2989 spin_unlock_bh(&acqseq_lock);
2993 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
2995 struct sk_buff *skb;
2996 struct sadb_msg *hdr;
2997 struct sadb_address *addr;
2998 struct sadb_x_policy *pol;
2999 struct sockaddr_in *sin;
3000 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3001 struct sockaddr_in6 *sin6;
3005 struct sadb_x_sec_ctx *sec_ctx;
3006 struct xfrm_sec_ctx *xfrm_ctx;
3009 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3013 size = sizeof(struct sadb_msg) +
3014 (sizeof(struct sadb_address) * 2) +
3015 (sockaddr_size * 2) +
3016 sizeof(struct sadb_x_policy);
3018 if (x->id.proto == IPPROTO_AH)
3019 size += count_ah_combs(t);
3020 else if (x->id.proto == IPPROTO_ESP)
3021 size += count_esp_combs(t);
3023 if ((xfrm_ctx = x->security)) {
3024 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3025 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3028 skb = alloc_skb(size + 16, GFP_ATOMIC);
3032 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3033 hdr->sadb_msg_version = PF_KEY_V2;
3034 hdr->sadb_msg_type = SADB_ACQUIRE;
3035 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3036 hdr->sadb_msg_len = size / sizeof(uint64_t);
3037 hdr->sadb_msg_errno = 0;
3038 hdr->sadb_msg_reserved = 0;
3039 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3040 hdr->sadb_msg_pid = 0;
3043 addr = (struct sadb_address*) skb_put(skb,
3044 sizeof(struct sadb_address)+sockaddr_size);
3045 addr->sadb_address_len =
3046 (sizeof(struct sadb_address)+sockaddr_size)/
3048 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3049 addr->sadb_address_proto = 0;
3050 addr->sadb_address_reserved = 0;
3051 if (x->props.family == AF_INET) {
3052 addr->sadb_address_prefixlen = 32;
3054 sin = (struct sockaddr_in *) (addr + 1);
3055 sin->sin_family = AF_INET;
3056 sin->sin_addr.s_addr = x->props.saddr.a4;
3058 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3060 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3061 else if (x->props.family == AF_INET6) {
3062 addr->sadb_address_prefixlen = 128;
3064 sin6 = (struct sockaddr_in6 *) (addr + 1);
3065 sin6->sin6_family = AF_INET6;
3066 sin6->sin6_port = 0;
3067 sin6->sin6_flowinfo = 0;
3068 memcpy(&sin6->sin6_addr,
3069 x->props.saddr.a6, sizeof(struct in6_addr));
3070 sin6->sin6_scope_id = 0;
3077 addr = (struct sadb_address*) skb_put(skb,
3078 sizeof(struct sadb_address)+sockaddr_size);
3079 addr->sadb_address_len =
3080 (sizeof(struct sadb_address)+sockaddr_size)/
3082 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3083 addr->sadb_address_proto = 0;
3084 addr->sadb_address_reserved = 0;
3085 if (x->props.family == AF_INET) {
3086 addr->sadb_address_prefixlen = 32;
3088 sin = (struct sockaddr_in *) (addr + 1);
3089 sin->sin_family = AF_INET;
3090 sin->sin_addr.s_addr = x->id.daddr.a4;
3092 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3094 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3095 else if (x->props.family == AF_INET6) {
3096 addr->sadb_address_prefixlen = 128;
3098 sin6 = (struct sockaddr_in6 *) (addr + 1);
3099 sin6->sin6_family = AF_INET6;
3100 sin6->sin6_port = 0;
3101 sin6->sin6_flowinfo = 0;
3102 memcpy(&sin6->sin6_addr,
3103 x->id.daddr.a6, sizeof(struct in6_addr));
3104 sin6->sin6_scope_id = 0;
3110 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3111 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3112 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3113 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3114 pol->sadb_x_policy_dir = dir+1;
3115 pol->sadb_x_policy_id = xp->index;
3117 /* Set sadb_comb's. */
3118 if (x->id.proto == IPPROTO_AH)
3119 dump_ah_combs(skb, t);
3120 else if (x->id.proto == IPPROTO_ESP)
3121 dump_esp_combs(skb, t);
3123 /* security context */
3125 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3126 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3127 sec_ctx->sadb_x_sec_len =
3128 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3129 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3130 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3131 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3132 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3133 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3137 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3140 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3141 u8 *data, int len, int *dir)
3143 struct xfrm_policy *xp;
3144 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3145 struct sadb_x_sec_ctx *sec_ctx;
3147 switch (sk->sk_family) {
3149 if (opt != IP_IPSEC_POLICY) {
3154 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3156 if (opt != IPV6_IPSEC_POLICY) {
3169 if (len < sizeof(struct sadb_x_policy) ||
3170 pol->sadb_x_policy_len*8 > len ||
3171 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3172 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3175 xp = xfrm_policy_alloc(GFP_ATOMIC);
3181 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3182 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3184 xp->lft.soft_byte_limit = XFRM_INF;
3185 xp->lft.hard_byte_limit = XFRM_INF;
3186 xp->lft.soft_packet_limit = XFRM_INF;
3187 xp->lft.hard_packet_limit = XFRM_INF;
3188 xp->family = sk->sk_family;
3191 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3192 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3195 /* security context too */
3196 if (len >= (pol->sadb_x_policy_len*8 +
3197 sizeof(struct sadb_x_sec_ctx))) {
3198 char *p = (char *)pol;
3199 struct xfrm_user_sec_ctx *uctx;
3201 p += pol->sadb_x_policy_len*8;
3202 sec_ctx = (struct sadb_x_sec_ctx *)p;
3203 if (len < pol->sadb_x_policy_len*8 +
3204 sec_ctx->sadb_x_sec_len) {
3208 if ((*dir = verify_sec_ctx_len(p)))
3210 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3211 *dir = security_xfrm_policy_alloc(xp, uctx);
3218 *dir = pol->sadb_x_policy_dir-1;
3222 security_xfrm_policy_free(xp);
3227 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3229 struct sk_buff *skb;
3230 struct sadb_msg *hdr;
3232 struct sadb_address *addr;
3233 struct sadb_x_nat_t_port *n_port;
3234 struct sockaddr_in *sin;
3235 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3236 struct sockaddr_in6 *sin6;
3240 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3241 struct xfrm_encap_tmpl *natt = NULL;
3243 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3255 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3257 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3258 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3261 size = sizeof(struct sadb_msg) +
3262 sizeof(struct sadb_sa) +
3263 (sizeof(struct sadb_address) * 2) +
3264 (sockaddr_size * 2) +
3265 (sizeof(struct sadb_x_nat_t_port) * 2);
3267 skb = alloc_skb(size + 16, GFP_ATOMIC);
3271 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3272 hdr->sadb_msg_version = PF_KEY_V2;
3273 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3274 hdr->sadb_msg_satype = satype;
3275 hdr->sadb_msg_len = size / sizeof(uint64_t);
3276 hdr->sadb_msg_errno = 0;
3277 hdr->sadb_msg_reserved = 0;
3278 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3279 hdr->sadb_msg_pid = 0;
3282 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3283 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3284 sa->sadb_sa_exttype = SADB_EXT_SA;
3285 sa->sadb_sa_spi = x->id.spi;
3286 sa->sadb_sa_replay = 0;
3287 sa->sadb_sa_state = 0;
3288 sa->sadb_sa_auth = 0;
3289 sa->sadb_sa_encrypt = 0;
3290 sa->sadb_sa_flags = 0;
3292 /* ADDRESS_SRC (old addr) */
3293 addr = (struct sadb_address*)
3294 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3295 addr->sadb_address_len =
3296 (sizeof(struct sadb_address)+sockaddr_size)/
3298 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3299 addr->sadb_address_proto = 0;
3300 addr->sadb_address_reserved = 0;
3301 if (x->props.family == AF_INET) {
3302 addr->sadb_address_prefixlen = 32;
3304 sin = (struct sockaddr_in *) (addr + 1);
3305 sin->sin_family = AF_INET;
3306 sin->sin_addr.s_addr = x->props.saddr.a4;
3308 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3310 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3311 else if (x->props.family == AF_INET6) {
3312 addr->sadb_address_prefixlen = 128;
3314 sin6 = (struct sockaddr_in6 *) (addr + 1);
3315 sin6->sin6_family = AF_INET6;
3316 sin6->sin6_port = 0;
3317 sin6->sin6_flowinfo = 0;
3318 memcpy(&sin6->sin6_addr,
3319 x->props.saddr.a6, sizeof(struct in6_addr));
3320 sin6->sin6_scope_id = 0;
3326 /* NAT_T_SPORT (old port) */
3327 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3328 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3329 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3330 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3331 n_port->sadb_x_nat_t_port_reserved = 0;
3333 /* ADDRESS_DST (new addr) */
3334 addr = (struct sadb_address*)
3335 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3336 addr->sadb_address_len =
3337 (sizeof(struct sadb_address)+sockaddr_size)/
3339 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3340 addr->sadb_address_proto = 0;
3341 addr->sadb_address_reserved = 0;
3342 if (x->props.family == AF_INET) {
3343 addr->sadb_address_prefixlen = 32;
3345 sin = (struct sockaddr_in *) (addr + 1);
3346 sin->sin_family = AF_INET;
3347 sin->sin_addr.s_addr = ipaddr->a4;
3349 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3351 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3352 else if (x->props.family == AF_INET6) {
3353 addr->sadb_address_prefixlen = 128;
3355 sin6 = (struct sockaddr_in6 *) (addr + 1);
3356 sin6->sin6_family = AF_INET6;
3357 sin6->sin6_port = 0;
3358 sin6->sin6_flowinfo = 0;
3359 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3360 sin6->sin6_scope_id = 0;
3366 /* NAT_T_DPORT (new port) */
3367 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3368 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3369 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3370 n_port->sadb_x_nat_t_port_port = sport;
3371 n_port->sadb_x_nat_t_port_reserved = 0;
3373 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3376 #ifdef CONFIG_NET_KEY_MIGRATE
3377 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3378 struct xfrm_selector *sel)
3380 struct sadb_address *addr;
3381 struct sockaddr_in *sin;
3382 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3383 struct sockaddr_in6 *sin6;
3385 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3386 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3387 addr->sadb_address_exttype = type;
3388 addr->sadb_address_proto = sel->proto;
3389 addr->sadb_address_reserved = 0;
3392 case SADB_EXT_ADDRESS_SRC:
3393 if (sel->family == AF_INET) {
3394 addr->sadb_address_prefixlen = sel->prefixlen_s;
3395 sin = (struct sockaddr_in *)(addr + 1);
3396 sin->sin_family = AF_INET;
3397 memcpy(&sin->sin_addr.s_addr, &sel->saddr,
3398 sizeof(sin->sin_addr.s_addr));
3400 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3402 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3403 else if (sel->family == AF_INET6) {
3404 addr->sadb_address_prefixlen = sel->prefixlen_s;
3405 sin6 = (struct sockaddr_in6 *)(addr + 1);
3406 sin6->sin6_family = AF_INET6;
3407 sin6->sin6_port = 0;
3408 sin6->sin6_flowinfo = 0;
3409 sin6->sin6_scope_id = 0;
3410 memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr,
3411 sizeof(sin6->sin6_addr.s6_addr));
3415 case SADB_EXT_ADDRESS_DST:
3416 if (sel->family == AF_INET) {
3417 addr->sadb_address_prefixlen = sel->prefixlen_d;
3418 sin = (struct sockaddr_in *)(addr + 1);
3419 sin->sin_family = AF_INET;
3420 memcpy(&sin->sin_addr.s_addr, &sel->daddr,
3421 sizeof(sin->sin_addr.s_addr));
3423 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3425 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3426 else if (sel->family == AF_INET6) {
3427 addr->sadb_address_prefixlen = sel->prefixlen_d;
3428 sin6 = (struct sockaddr_in6 *)(addr + 1);
3429 sin6->sin6_family = AF_INET6;
3430 sin6->sin6_port = 0;
3431 sin6->sin6_flowinfo = 0;
3432 sin6->sin6_scope_id = 0;
3433 memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr,
3434 sizeof(sin6->sin6_addr.s6_addr));
3445 static int set_ipsecrequest(struct sk_buff *skb,
3446 uint8_t proto, uint8_t mode, int level,
3447 uint32_t reqid, uint8_t family,
3448 xfrm_address_t *src, xfrm_address_t *dst)
3450 struct sadb_x_ipsecrequest *rq;
3451 struct sockaddr_in *sin;
3452 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3453 struct sockaddr_in6 *sin6;
3457 size_req = sizeof(struct sadb_x_ipsecrequest) +
3458 pfkey_sockaddr_pair_size(family);
3460 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3461 memset(rq, 0, size_req);
3462 rq->sadb_x_ipsecrequest_len = size_req;
3463 rq->sadb_x_ipsecrequest_proto = proto;
3464 rq->sadb_x_ipsecrequest_mode = mode;
3465 rq->sadb_x_ipsecrequest_level = level;
3466 rq->sadb_x_ipsecrequest_reqid = reqid;
3470 sin = (struct sockaddr_in *)(rq + 1);
3471 sin->sin_family = AF_INET;
3472 memcpy(&sin->sin_addr.s_addr, src,
3473 sizeof(sin->sin_addr.s_addr));
3475 sin->sin_family = AF_INET;
3476 memcpy(&sin->sin_addr.s_addr, dst,
3477 sizeof(sin->sin_addr.s_addr));
3479 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3481 sin6 = (struct sockaddr_in6 *)(rq + 1);
3482 sin6->sin6_family = AF_INET6;
3483 sin6->sin6_port = 0;
3484 sin6->sin6_flowinfo = 0;
3485 sin6->sin6_scope_id = 0;
3486 memcpy(&sin6->sin6_addr.s6_addr, src,
3487 sizeof(sin6->sin6_addr.s6_addr));
3489 sin6->sin6_family = AF_INET6;
3490 sin6->sin6_port = 0;
3491 sin6->sin6_flowinfo = 0;
3492 sin6->sin6_scope_id = 0;
3493 memcpy(&sin6->sin6_addr.s6_addr, dst,
3494 sizeof(sin6->sin6_addr.s6_addr));
3505 #ifdef CONFIG_NET_KEY_MIGRATE
3506 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3507 struct xfrm_migrate *m, int num_bundles)
3513 struct sk_buff *skb;
3514 struct sadb_msg *hdr;
3515 struct sadb_x_policy *pol;
3516 struct xfrm_migrate *mp;
3518 if (type != XFRM_POLICY_TYPE_MAIN)
3521 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3525 sasize_sel = pfkey_sockaddr_size(sel->family);
3528 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3531 size_pol += sizeof(struct sadb_x_policy);
3534 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3535 /* old locator pair */
3536 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3537 pfkey_sockaddr_pair_size(mp->old_family);
3538 /* new locator pair */
3539 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3540 pfkey_sockaddr_pair_size(mp->new_family);
3543 size += sizeof(struct sadb_msg) + size_pol;
3546 skb = alloc_skb(size, GFP_ATOMIC);
3550 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3551 hdr->sadb_msg_version = PF_KEY_V2;
3552 hdr->sadb_msg_type = SADB_X_MIGRATE;
3553 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3554 hdr->sadb_msg_len = size / 8;
3555 hdr->sadb_msg_errno = 0;
3556 hdr->sadb_msg_reserved = 0;
3557 hdr->sadb_msg_seq = 0;
3558 hdr->sadb_msg_pid = 0;
3561 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3564 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3566 /* policy information */
3567 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3568 pol->sadb_x_policy_len = size_pol / 8;
3569 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3570 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3571 pol->sadb_x_policy_dir = dir + 1;
3572 pol->sadb_x_policy_id = 0;
3573 pol->sadb_x_policy_priority = 0;
3575 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3576 /* old ipsecrequest */
3577 int mode = pfkey_mode_from_xfrm(mp->mode);
3580 if (set_ipsecrequest(skb, mp->proto, mode,
3581 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3582 mp->reqid, mp->old_family,
3583 &mp->old_saddr, &mp->old_daddr) < 0) {
3587 /* new ipsecrequest */
3588 if (set_ipsecrequest(skb, mp->proto, mode,
3589 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3590 mp->reqid, mp->new_family,
3591 &mp->new_saddr, &mp->new_daddr) < 0) {
3596 /* broadcast migrate message to sockets */
3597 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3602 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3603 struct xfrm_migrate *m, int num_bundles)
3605 return -ENOPROTOOPT;
3609 static int pfkey_sendmsg(struct kiocb *kiocb,
3610 struct socket *sock, struct msghdr *msg, size_t len)
3612 struct sock *sk = sock->sk;
3613 struct sk_buff *skb = NULL;
3614 struct sadb_msg *hdr = NULL;
3618 if (msg->msg_flags & MSG_OOB)
3622 if ((unsigned)len > sk->sk_sndbuf - 32)
3626 skb = alloc_skb(len, GFP_KERNEL);
3631 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3634 hdr = pfkey_get_base_msg(skb, &err);
3638 mutex_lock(&xfrm_cfg_mutex);
3639 err = pfkey_process(sk, skb, hdr);
3640 mutex_unlock(&xfrm_cfg_mutex);
3643 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3651 static int pfkey_recvmsg(struct kiocb *kiocb,
3652 struct socket *sock, struct msghdr *msg, size_t len,
3655 struct sock *sk = sock->sk;
3656 struct sk_buff *skb;
3660 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3663 msg->msg_namelen = 0;
3664 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3670 msg->msg_flags |= MSG_TRUNC;
3674 skb_reset_transport_header(skb);
3675 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3679 sock_recv_timestamp(msg, sk, skb);
3681 err = (flags & MSG_TRUNC) ? skb->len : copied;
3684 skb_free_datagram(sk, skb);
3689 static const struct proto_ops pfkey_ops = {
3691 .owner = THIS_MODULE,
3692 /* Operations that make no sense on pfkey sockets. */
3693 .bind = sock_no_bind,
3694 .connect = sock_no_connect,
3695 .socketpair = sock_no_socketpair,
3696 .accept = sock_no_accept,
3697 .getname = sock_no_getname,
3698 .ioctl = sock_no_ioctl,
3699 .listen = sock_no_listen,
3700 .shutdown = sock_no_shutdown,
3701 .setsockopt = sock_no_setsockopt,
3702 .getsockopt = sock_no_getsockopt,
3703 .mmap = sock_no_mmap,
3704 .sendpage = sock_no_sendpage,
3706 /* Now the operations that really occur. */
3707 .release = pfkey_release,
3708 .poll = datagram_poll,
3709 .sendmsg = pfkey_sendmsg,
3710 .recvmsg = pfkey_recvmsg,
3713 static struct net_proto_family pfkey_family_ops = {
3715 .create = pfkey_create,
3716 .owner = THIS_MODULE,
3719 #ifdef CONFIG_PROC_FS
3720 static int pfkey_read_proc(char *buffer, char **start, off_t offset,
3721 int length, int *eof, void *data)
3727 struct hlist_node *node;
3729 len += sprintf(buffer,"sk RefCnt Rmem Wmem User Inode\n");
3731 read_lock(&pfkey_table_lock);
3733 sk_for_each(s, node, &pfkey_table) {
3734 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
3736 atomic_read(&s->sk_refcnt),
3737 atomic_read(&s->sk_rmem_alloc),
3738 atomic_read(&s->sk_wmem_alloc),
3743 buffer[len++] = '\n';
3750 if(pos > offset + length)
3756 read_unlock(&pfkey_table_lock);
3758 *start = buffer + (offset - begin);
3759 len -= (offset - begin);
3770 static struct xfrm_mgr pfkeyv2_mgr =
3773 .notify = pfkey_send_notify,
3774 .acquire = pfkey_send_acquire,
3775 .compile_policy = pfkey_compile_policy,
3776 .new_mapping = pfkey_send_new_mapping,
3777 .notify_policy = pfkey_send_policy_notify,
3778 .migrate = pfkey_send_migrate,
3781 static void __exit ipsec_pfkey_exit(void)
3783 xfrm_unregister_km(&pfkeyv2_mgr);
3784 remove_proc_entry("net/pfkey", NULL);
3785 sock_unregister(PF_KEY);
3786 proto_unregister(&key_proto);
3789 static int __init ipsec_pfkey_init(void)
3791 int err = proto_register(&key_proto, 0);
3796 err = sock_register(&pfkey_family_ops);
3798 goto out_unregister_key_proto;
3799 #ifdef CONFIG_PROC_FS
3801 if (create_proc_read_entry("net/pfkey", 0, NULL, pfkey_read_proc, NULL) == NULL)
3802 goto out_sock_unregister;
3804 err = xfrm_register_km(&pfkeyv2_mgr);
3806 goto out_remove_proc_entry;
3809 out_remove_proc_entry:
3810 #ifdef CONFIG_PROC_FS
3811 remove_proc_entry("net/pfkey", NULL);
3812 out_sock_unregister:
3814 sock_unregister(PF_KEY);
3815 out_unregister_key_proto:
3816 proto_unregister(&key_proto);
3820 module_init(ipsec_pfkey_init);
3821 module_exit(ipsec_pfkey_exit);
3822 MODULE_LICENSE("GPL");
3823 MODULE_ALIAS_NETPROTO(PF_KEY);