2 * net/key/af_key.c An implementation of PF_KEYv2 sockets.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
9 * Authors: Maxim Giryaev <gem@asplinux.ru>
10 * David S. Miller <davem@redhat.com>
11 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
12 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
14 * Derek Atkins <derek@ihtfp.com>
17 #include <linux/capability.h>
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/socket.h>
21 #include <linux/pfkeyv2.h>
22 #include <linux/ipsec.h>
23 #include <linux/skbuff.h>
24 #include <linux/rtnetlink.h>
26 #include <linux/in6.h>
27 #include <linux/proc_fs.h>
28 #include <linux/init.h>
29 #include <linux/slab.h>
30 #include <net/net_namespace.h>
31 #include <net/netns/generic.h>
36 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
37 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
39 static unsigned int pfkey_net_id __read_mostly;
41 /* List of all pfkey sockets. */
42 struct hlist_head table;
45 static DEFINE_MUTEX(pfkey_mutex);
48 static const struct xfrm_mark dummy_mark = {0, 0};
50 /* struct sock must be the first member of struct pfkey_sock */
58 int (*dump)(struct pfkey_sock *sk);
59 void (*done)(struct pfkey_sock *sk);
61 struct xfrm_policy_walk policy;
62 struct xfrm_state_walk state;
66 struct mutex dump_lock;
69 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
70 xfrm_address_t *saddr, xfrm_address_t *daddr,
73 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
75 return (struct pfkey_sock *)sk;
78 static int pfkey_can_dump(const struct sock *sk)
80 if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
85 static void pfkey_terminate_dump(struct pfkey_sock *pfk)
89 kfree_skb(pfk->dump.skb);
93 pfk->dump.dump = NULL;
94 pfk->dump.done = NULL;
98 static void pfkey_sock_destruct(struct sock *sk)
100 struct net *net = sock_net(sk);
101 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
103 pfkey_terminate_dump(pfkey_sk(sk));
104 skb_queue_purge(&sk->sk_receive_queue);
106 if (!sock_flag(sk, SOCK_DEAD)) {
107 pr_err("Attempt to release alive pfkey socket: %p\n", sk);
111 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
112 WARN_ON(atomic_read(&sk->sk_wmem_alloc));
114 atomic_dec(&net_pfkey->socks_nr);
117 static const struct proto_ops pfkey_ops;
119 static void pfkey_insert(struct sock *sk)
121 struct net *net = sock_net(sk);
122 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
124 mutex_lock(&pfkey_mutex);
125 sk_add_node_rcu(sk, &net_pfkey->table);
126 mutex_unlock(&pfkey_mutex);
129 static void pfkey_remove(struct sock *sk)
131 mutex_lock(&pfkey_mutex);
132 sk_del_node_init_rcu(sk);
133 mutex_unlock(&pfkey_mutex);
136 static struct proto key_proto = {
138 .owner = THIS_MODULE,
139 .obj_size = sizeof(struct pfkey_sock),
142 static int pfkey_create(struct net *net, struct socket *sock, int protocol,
145 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
147 struct pfkey_sock *pfk;
150 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
152 if (sock->type != SOCK_RAW)
153 return -ESOCKTNOSUPPORT;
154 if (protocol != PF_KEY_V2)
155 return -EPROTONOSUPPORT;
158 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto, kern);
163 mutex_init(&pfk->dump_lock);
165 sock->ops = &pfkey_ops;
166 sock_init_data(sock, sk);
168 sk->sk_family = PF_KEY;
169 sk->sk_destruct = pfkey_sock_destruct;
171 atomic_inc(&net_pfkey->socks_nr);
180 static int pfkey_release(struct socket *sock)
182 struct sock *sk = sock->sk;
191 skb_queue_purge(&sk->sk_write_queue);
199 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
200 gfp_t allocation, struct sock *sk)
206 if (atomic_read(&skb->users) != 1) {
207 *skb2 = skb_clone(skb, allocation);
210 atomic_inc(&skb->users);
214 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
215 skb_set_owner_r(*skb2, sk);
216 skb_queue_tail(&sk->sk_receive_queue, *skb2);
217 sk->sk_data_ready(sk);
226 /* Send SKB to all pfkey sockets matching selected criteria. */
227 #define BROADCAST_ALL 0
228 #define BROADCAST_ONE 1
229 #define BROADCAST_REGISTERED 2
230 #define BROADCAST_PROMISC_ONLY 4
231 static int pfkey_broadcast(struct sk_buff *skb,
232 int broadcast_flags, struct sock *one_sk,
235 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
237 struct sk_buff *skb2 = NULL;
240 /* XXX Do we need something like netlink_overrun? I think
241 * XXX PF_KEY socket apps will not mind current behavior.
247 sk_for_each_rcu(sk, &net_pfkey->table) {
248 struct pfkey_sock *pfk = pfkey_sk(sk);
251 /* Yes, it means that if you are meant to receive this
252 * pfkey message you receive it twice as promiscuous
256 pfkey_broadcast_one(skb, &skb2, GFP_ATOMIC, sk);
258 /* the exact target will be processed later */
261 if (broadcast_flags != BROADCAST_ALL) {
262 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
264 if ((broadcast_flags & BROADCAST_REGISTERED) &&
267 if (broadcast_flags & BROADCAST_ONE)
271 err2 = pfkey_broadcast_one(skb, &skb2, GFP_ATOMIC, sk);
273 /* Error is cleared after successful sending to at least one
275 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
281 err = pfkey_broadcast_one(skb, &skb2, GFP_KERNEL, one_sk);
288 static int pfkey_do_dump(struct pfkey_sock *pfk)
290 struct sadb_msg *hdr;
293 mutex_lock(&pfk->dump_lock);
294 if (!pfk->dump.dump) {
299 rc = pfk->dump.dump(pfk);
300 if (rc == -ENOBUFS) {
306 if (!pfkey_can_dump(&pfk->sk)) {
311 hdr = (struct sadb_msg *) pfk->dump.skb->data;
312 hdr->sadb_msg_seq = 0;
313 hdr->sadb_msg_errno = rc;
314 pfkey_broadcast(pfk->dump.skb, BROADCAST_ONE,
315 &pfk->sk, sock_net(&pfk->sk));
316 pfk->dump.skb = NULL;
319 pfkey_terminate_dump(pfk);
322 mutex_unlock(&pfk->dump_lock);
326 static inline void pfkey_hdr_dup(struct sadb_msg *new,
327 const struct sadb_msg *orig)
332 static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk)
334 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
335 struct sadb_msg *hdr;
340 /* Woe be to the platform trying to support PFKEY yet
341 * having normal errnos outside the 1-255 range, inclusive.
344 if (err == ERESTARTSYS ||
345 err == ERESTARTNOHAND ||
346 err == ERESTARTNOINTR)
350 BUG_ON(err <= 0 || err >= 256);
352 hdr = skb_put(skb, sizeof(struct sadb_msg));
353 pfkey_hdr_dup(hdr, orig);
354 hdr->sadb_msg_errno = (uint8_t) err;
355 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
358 pfkey_broadcast(skb, BROADCAST_ONE, sk, sock_net(sk));
363 static const u8 sadb_ext_min_len[] = {
364 [SADB_EXT_RESERVED] = (u8) 0,
365 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
366 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
367 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
368 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
369 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
370 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
371 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
372 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
373 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
374 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
375 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
376 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
377 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
378 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
379 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
380 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
381 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
382 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
383 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
384 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
385 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
386 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
387 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
388 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
389 [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress),
390 [SADB_X_EXT_FILTER] = (u8) sizeof(struct sadb_x_filter),
393 /* Verify sadb_address_{len,prefixlen} against sa_family. */
394 static int verify_address_len(const void *p)
396 const struct sadb_address *sp = p;
397 const struct sockaddr *addr = (const struct sockaddr *)(sp + 1);
398 const struct sockaddr_in *sin;
399 #if IS_ENABLED(CONFIG_IPV6)
400 const struct sockaddr_in6 *sin6;
404 switch (addr->sa_family) {
406 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
407 if (sp->sadb_address_len != len ||
408 sp->sadb_address_prefixlen > 32)
411 #if IS_ENABLED(CONFIG_IPV6)
413 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
414 if (sp->sadb_address_len != len ||
415 sp->sadb_address_prefixlen > 128)
420 /* It is user using kernel to keep track of security
421 * associations for another protocol, such as
422 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
425 * XXX Actually, association/policy database is not yet
426 * XXX able to cope with arbitrary sockaddr families.
427 * XXX When it can, remove this -EINVAL. -DaveM
435 static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx)
437 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
438 sec_ctx->sadb_x_ctx_len,
442 static inline int verify_sec_ctx_len(const void *p)
444 const struct sadb_x_sec_ctx *sec_ctx = p;
445 int len = sec_ctx->sadb_x_ctx_len;
450 len = pfkey_sec_ctx_len(sec_ctx);
452 if (sec_ctx->sadb_x_sec_len != len)
458 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx,
461 struct xfrm_user_sec_ctx *uctx = NULL;
462 int ctx_size = sec_ctx->sadb_x_ctx_len;
464 uctx = kmalloc((sizeof(*uctx)+ctx_size), gfp);
469 uctx->len = pfkey_sec_ctx_len(sec_ctx);
470 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
471 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
472 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
473 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
474 memcpy(uctx + 1, sec_ctx + 1,
480 static int present_and_same_family(const struct sadb_address *src,
481 const struct sadb_address *dst)
483 const struct sockaddr *s_addr, *d_addr;
488 s_addr = (const struct sockaddr *)(src + 1);
489 d_addr = (const struct sockaddr *)(dst + 1);
490 if (s_addr->sa_family != d_addr->sa_family)
492 if (s_addr->sa_family != AF_INET
493 #if IS_ENABLED(CONFIG_IPV6)
494 && s_addr->sa_family != AF_INET6
502 static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs)
504 const char *p = (char *) hdr;
510 const struct sadb_ext *ehdr = (const struct sadb_ext *) p;
514 ext_len = ehdr->sadb_ext_len;
515 ext_len *= sizeof(uint64_t);
516 ext_type = ehdr->sadb_ext_type;
517 if (ext_len < sizeof(uint64_t) ||
519 ext_type == SADB_EXT_RESERVED)
522 if (ext_type <= SADB_EXT_MAX) {
523 int min = (int) sadb_ext_min_len[ext_type];
526 if (ext_hdrs[ext_type-1] != NULL)
528 if (ext_type == SADB_EXT_ADDRESS_SRC ||
529 ext_type == SADB_EXT_ADDRESS_DST ||
530 ext_type == SADB_EXT_ADDRESS_PROXY ||
531 ext_type == SADB_X_EXT_NAT_T_OA) {
532 if (verify_address_len(p))
535 if (ext_type == SADB_X_EXT_SEC_CTX) {
536 if (verify_sec_ctx_len(p))
539 ext_hdrs[ext_type-1] = (void *) p;
549 pfkey_satype2proto(uint8_t satype)
552 case SADB_SATYPE_UNSPEC:
553 return IPSEC_PROTO_ANY;
556 case SADB_SATYPE_ESP:
558 case SADB_X_SATYPE_IPCOMP:
567 pfkey_proto2satype(uint16_t proto)
571 return SADB_SATYPE_AH;
573 return SADB_SATYPE_ESP;
575 return SADB_X_SATYPE_IPCOMP;
582 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
583 * say specifically 'just raw sockets' as we encode them as 255.
586 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
588 return proto == IPSEC_PROTO_ANY ? 0 : proto;
591 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
593 return proto ? proto : IPSEC_PROTO_ANY;
596 static inline int pfkey_sockaddr_len(sa_family_t family)
600 return sizeof(struct sockaddr_in);
601 #if IS_ENABLED(CONFIG_IPV6)
603 return sizeof(struct sockaddr_in6);
610 int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
612 switch (sa->sa_family) {
615 ((struct sockaddr_in *)sa)->sin_addr.s_addr;
617 #if IS_ENABLED(CONFIG_IPV6)
620 &((struct sockaddr_in6 *)sa)->sin6_addr,
621 sizeof(struct in6_addr));
629 int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr)
631 return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
635 static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs)
637 const struct sadb_sa *sa;
638 const struct sadb_address *addr;
640 unsigned short family;
641 xfrm_address_t *xaddr;
643 sa = ext_hdrs[SADB_EXT_SA - 1];
647 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
651 /* sadb_address_len should be checked by caller */
652 addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
656 family = ((const struct sockaddr *)(addr + 1))->sa_family;
659 xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr;
661 #if IS_ENABLED(CONFIG_IPV6)
663 xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr;
673 return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family);
676 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
679 pfkey_sockaddr_size(sa_family_t family)
681 return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
684 static inline int pfkey_mode_from_xfrm(int mode)
687 case XFRM_MODE_TRANSPORT:
688 return IPSEC_MODE_TRANSPORT;
689 case XFRM_MODE_TUNNEL:
690 return IPSEC_MODE_TUNNEL;
692 return IPSEC_MODE_BEET;
698 static inline int pfkey_mode_to_xfrm(int mode)
701 case IPSEC_MODE_ANY: /*XXX*/
702 case IPSEC_MODE_TRANSPORT:
703 return XFRM_MODE_TRANSPORT;
704 case IPSEC_MODE_TUNNEL:
705 return XFRM_MODE_TUNNEL;
706 case IPSEC_MODE_BEET:
707 return XFRM_MODE_BEET;
713 static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port,
715 unsigned short family)
720 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
721 sin->sin_family = AF_INET;
722 sin->sin_port = port;
723 sin->sin_addr.s_addr = xaddr->a4;
724 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
727 #if IS_ENABLED(CONFIG_IPV6)
730 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
731 sin6->sin6_family = AF_INET6;
732 sin6->sin6_port = port;
733 sin6->sin6_flowinfo = 0;
734 sin6->sin6_addr = xaddr->in6;
735 sin6->sin6_scope_id = 0;
743 static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x,
744 int add_keys, int hsc)
747 struct sadb_msg *hdr;
749 struct sadb_lifetime *lifetime;
750 struct sadb_address *addr;
751 struct sadb_key *key;
752 struct sadb_x_sa2 *sa2;
753 struct sadb_x_sec_ctx *sec_ctx;
754 struct xfrm_sec_ctx *xfrm_ctx;
757 int auth_key_size = 0;
758 int encrypt_key_size = 0;
760 struct xfrm_encap_tmpl *natt = NULL;
763 /* address family check */
764 sockaddr_size = pfkey_sockaddr_size(x->props.family);
766 return ERR_PTR(-EINVAL);
768 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
769 key(AE), (identity(SD),) (sensitivity)> */
770 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
771 sizeof(struct sadb_lifetime) +
772 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
773 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
774 sizeof(struct sadb_address)*2 +
776 sizeof(struct sadb_x_sa2);
778 if ((xfrm_ctx = x->security)) {
779 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
780 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
783 /* identity & sensitivity */
784 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family))
785 size += sizeof(struct sadb_address) + sockaddr_size;
788 if (x->aalg && x->aalg->alg_key_len) {
790 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
791 size += sizeof(struct sadb_key) + auth_key_size;
793 if (x->ealg && x->ealg->alg_key_len) {
795 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
796 size += sizeof(struct sadb_key) + encrypt_key_size;
802 if (natt && natt->encap_type) {
803 size += sizeof(struct sadb_x_nat_t_type);
804 size += sizeof(struct sadb_x_nat_t_port);
805 size += sizeof(struct sadb_x_nat_t_port);
808 skb = alloc_skb(size + 16, GFP_ATOMIC);
810 return ERR_PTR(-ENOBUFS);
812 /* call should fill header later */
813 hdr = skb_put(skb, sizeof(struct sadb_msg));
814 memset(hdr, 0, size); /* XXX do we need this ? */
815 hdr->sadb_msg_len = size / sizeof(uint64_t);
818 sa = skb_put(skb, sizeof(struct sadb_sa));
819 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
820 sa->sadb_sa_exttype = SADB_EXT_SA;
821 sa->sadb_sa_spi = x->id.spi;
822 sa->sadb_sa_replay = x->props.replay_window;
823 switch (x->km.state) {
824 case XFRM_STATE_VALID:
825 sa->sadb_sa_state = x->km.dying ?
826 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
829 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
832 sa->sadb_sa_state = SADB_SASTATE_DEAD;
835 sa->sadb_sa_auth = 0;
837 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
838 sa->sadb_sa_auth = (a && a->pfkey_supported) ?
839 a->desc.sadb_alg_id : 0;
841 sa->sadb_sa_encrypt = 0;
842 BUG_ON(x->ealg && x->calg);
844 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
845 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
846 a->desc.sadb_alg_id : 0;
848 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
850 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
851 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
852 a->desc.sadb_alg_id : 0;
855 sa->sadb_sa_flags = 0;
856 if (x->props.flags & XFRM_STATE_NOECN)
857 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
858 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
859 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
860 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
861 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
865 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
866 lifetime->sadb_lifetime_len =
867 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
868 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
869 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
870 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
871 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
872 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
876 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
877 lifetime->sadb_lifetime_len =
878 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
879 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
880 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
881 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
882 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
883 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
886 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
887 lifetime->sadb_lifetime_len =
888 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
889 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
890 lifetime->sadb_lifetime_allocations = x->curlft.packets;
891 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
892 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
893 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
895 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
896 addr->sadb_address_len =
897 (sizeof(struct sadb_address)+sockaddr_size)/
899 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
900 /* "if the ports are non-zero, then the sadb_address_proto field,
901 normally zero, MUST be filled in with the transport
902 protocol's number." - RFC2367 */
903 addr->sadb_address_proto = 0;
904 addr->sadb_address_reserved = 0;
906 addr->sadb_address_prefixlen =
907 pfkey_sockaddr_fill(&x->props.saddr, 0,
908 (struct sockaddr *) (addr + 1),
910 if (!addr->sadb_address_prefixlen)
914 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
915 addr->sadb_address_len =
916 (sizeof(struct sadb_address)+sockaddr_size)/
918 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
919 addr->sadb_address_proto = 0;
920 addr->sadb_address_reserved = 0;
922 addr->sadb_address_prefixlen =
923 pfkey_sockaddr_fill(&x->id.daddr, 0,
924 (struct sockaddr *) (addr + 1),
926 if (!addr->sadb_address_prefixlen)
929 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr,
932 sizeof(struct sadb_address) + sockaddr_size);
933 addr->sadb_address_len =
934 (sizeof(struct sadb_address)+sockaddr_size)/
936 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
937 addr->sadb_address_proto =
938 pfkey_proto_from_xfrm(x->sel.proto);
939 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
940 addr->sadb_address_reserved = 0;
942 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
943 (struct sockaddr *) (addr + 1),
948 if (add_keys && auth_key_size) {
949 key = skb_put(skb, sizeof(struct sadb_key) + auth_key_size);
950 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
952 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
953 key->sadb_key_bits = x->aalg->alg_key_len;
954 key->sadb_key_reserved = 0;
955 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
958 if (add_keys && encrypt_key_size) {
959 key = skb_put(skb, sizeof(struct sadb_key) + encrypt_key_size);
960 key->sadb_key_len = (sizeof(struct sadb_key) +
961 encrypt_key_size) / sizeof(uint64_t);
962 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
963 key->sadb_key_bits = x->ealg->alg_key_len;
964 key->sadb_key_reserved = 0;
965 memcpy(key + 1, x->ealg->alg_key,
966 (x->ealg->alg_key_len+7)/8);
970 sa2 = skb_put(skb, sizeof(struct sadb_x_sa2));
971 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
972 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
973 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
975 return ERR_PTR(-EINVAL);
977 sa2->sadb_x_sa2_mode = mode;
978 sa2->sadb_x_sa2_reserved1 = 0;
979 sa2->sadb_x_sa2_reserved2 = 0;
980 sa2->sadb_x_sa2_sequence = 0;
981 sa2->sadb_x_sa2_reqid = x->props.reqid;
983 if (natt && natt->encap_type) {
984 struct sadb_x_nat_t_type *n_type;
985 struct sadb_x_nat_t_port *n_port;
988 n_type = skb_put(skb, sizeof(*n_type));
989 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
990 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
991 n_type->sadb_x_nat_t_type_type = natt->encap_type;
992 n_type->sadb_x_nat_t_type_reserved[0] = 0;
993 n_type->sadb_x_nat_t_type_reserved[1] = 0;
994 n_type->sadb_x_nat_t_type_reserved[2] = 0;
997 n_port = skb_put(skb, sizeof(*n_port));
998 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
999 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
1000 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
1001 n_port->sadb_x_nat_t_port_reserved = 0;
1004 n_port = skb_put(skb, sizeof(*n_port));
1005 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1006 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
1007 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
1008 n_port->sadb_x_nat_t_port_reserved = 0;
1011 /* security context */
1013 sec_ctx = skb_put(skb,
1014 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1015 sec_ctx->sadb_x_sec_len =
1016 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1017 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1018 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1019 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1020 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1021 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1029 static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x)
1031 struct sk_buff *skb;
1033 skb = __pfkey_xfrm_state2msg(x, 1, 3);
1038 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x,
1041 return __pfkey_xfrm_state2msg(x, 0, hsc);
1044 static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
1045 const struct sadb_msg *hdr,
1046 void * const *ext_hdrs)
1048 struct xfrm_state *x;
1049 const struct sadb_lifetime *lifetime;
1050 const struct sadb_sa *sa;
1051 const struct sadb_key *key;
1052 const struct sadb_x_sec_ctx *sec_ctx;
1057 sa = ext_hdrs[SADB_EXT_SA - 1];
1059 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1060 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1061 return ERR_PTR(-EINVAL);
1062 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1063 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1064 return ERR_PTR(-EINVAL);
1065 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1066 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1067 return ERR_PTR(-EINVAL);
1068 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1069 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1070 return ERR_PTR(-EINVAL);
1072 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1074 return ERR_PTR(-EINVAL);
1076 /* default error is no buffer space */
1081 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1082 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1083 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1084 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1085 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1088 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1089 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1091 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1092 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1093 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1094 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1095 return ERR_PTR(-EINVAL);
1096 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1098 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1099 ((key->sadb_key_bits+7) / 8 == 0 ||
1100 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1101 return ERR_PTR(-EINVAL);
1102 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1104 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1105 ((key->sadb_key_bits+7) / 8 == 0 ||
1106 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1107 return ERR_PTR(-EINVAL);
1109 x = xfrm_state_alloc(net);
1111 return ERR_PTR(-ENOBUFS);
1113 x->id.proto = proto;
1114 x->id.spi = sa->sadb_sa_spi;
1115 x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay,
1116 (sizeof(x->replay.bitmap) * 8));
1117 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1118 x->props.flags |= XFRM_STATE_NOECN;
1119 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1120 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1121 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1122 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1124 lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1];
1125 if (lifetime != NULL) {
1126 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1127 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1128 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1129 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1131 lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1];
1132 if (lifetime != NULL) {
1133 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1134 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1135 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1136 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1139 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
1140 if (sec_ctx != NULL) {
1141 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
1146 err = security_xfrm_state_alloc(x, uctx);
1153 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1154 if (sa->sadb_sa_auth) {
1156 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1157 if (!a || !a->pfkey_supported) {
1162 keysize = (key->sadb_key_bits + 7) / 8;
1163 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1166 strcpy(x->aalg->alg_name, a->name);
1167 x->aalg->alg_key_len = 0;
1169 x->aalg->alg_key_len = key->sadb_key_bits;
1170 memcpy(x->aalg->alg_key, key+1, keysize);
1172 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1173 x->props.aalgo = sa->sadb_sa_auth;
1174 /* x->algo.flags = sa->sadb_sa_flags; */
1176 if (sa->sadb_sa_encrypt) {
1177 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1178 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1179 if (!a || !a->pfkey_supported) {
1183 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1186 strcpy(x->calg->alg_name, a->name);
1187 x->props.calgo = sa->sadb_sa_encrypt;
1190 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1191 if (!a || !a->pfkey_supported) {
1195 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1197 keysize = (key->sadb_key_bits + 7) / 8;
1198 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1201 strcpy(x->ealg->alg_name, a->name);
1202 x->ealg->alg_key_len = 0;
1204 x->ealg->alg_key_len = key->sadb_key_bits;
1205 memcpy(x->ealg->alg_key, key+1, keysize);
1207 x->props.ealgo = sa->sadb_sa_encrypt;
1208 x->geniv = a->uinfo.encr.geniv;
1211 /* x->algo.flags = sa->sadb_sa_flags; */
1213 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1215 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1218 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1219 const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
1220 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1225 x->props.mode = mode;
1226 x->props.reqid = sa2->sadb_x_sa2_reqid;
1229 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1230 const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1232 /* Nobody uses this, but we try. */
1233 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1234 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1238 x->sel.family = x->props.family;
1240 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1241 const struct sadb_x_nat_t_type* n_type;
1242 struct xfrm_encap_tmpl *natt;
1244 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1249 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1250 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1252 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1253 const struct sadb_x_nat_t_port *n_port =
1254 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1255 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1257 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1258 const struct sadb_x_nat_t_port *n_port =
1259 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1260 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1262 memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
1265 err = xfrm_init_state(x);
1269 x->km.seq = hdr->sadb_msg_seq;
1273 x->km.state = XFRM_STATE_DEAD;
1275 return ERR_PTR(err);
1278 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1283 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1285 struct net *net = sock_net(sk);
1286 struct sk_buff *resp_skb;
1287 struct sadb_x_sa2 *sa2;
1288 struct sadb_address *saddr, *daddr;
1289 struct sadb_msg *out_hdr;
1290 struct sadb_spirange *range;
1291 struct xfrm_state *x = NULL;
1294 u32 min_spi, max_spi;
1297 unsigned short family;
1298 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1300 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1301 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1304 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1308 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1309 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1312 reqid = sa2->sadb_x_sa2_reqid;
1318 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1319 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1321 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1324 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1325 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1327 #if IS_ENABLED(CONFIG_IPV6)
1329 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1330 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1335 if (hdr->sadb_msg_seq) {
1336 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1337 if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) {
1344 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family);
1350 max_spi = 0x0fffffff;
1352 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1354 min_spi = range->sadb_spirange_min;
1355 max_spi = range->sadb_spirange_max;
1358 err = verify_spi_info(x->id.proto, min_spi, max_spi);
1364 err = xfrm_alloc_spi(x, min_spi, max_spi);
1365 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1367 if (IS_ERR(resp_skb)) {
1369 return PTR_ERR(resp_skb);
1372 out_hdr = (struct sadb_msg *) resp_skb->data;
1373 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1374 out_hdr->sadb_msg_type = SADB_GETSPI;
1375 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1376 out_hdr->sadb_msg_errno = 0;
1377 out_hdr->sadb_msg_reserved = 0;
1378 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1379 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1383 pfkey_broadcast(resp_skb, BROADCAST_ONE, sk, net);
1388 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1390 struct net *net = sock_net(sk);
1391 struct xfrm_state *x;
1393 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1396 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1399 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1403 spin_lock_bh(&x->lock);
1404 if (x->km.state == XFRM_STATE_ACQ)
1405 x->km.state = XFRM_STATE_ERROR;
1407 spin_unlock_bh(&x->lock);
1412 static inline int event2poltype(int event)
1415 case XFRM_MSG_DELPOLICY:
1416 return SADB_X_SPDDELETE;
1417 case XFRM_MSG_NEWPOLICY:
1418 return SADB_X_SPDADD;
1419 case XFRM_MSG_UPDPOLICY:
1420 return SADB_X_SPDUPDATE;
1421 case XFRM_MSG_POLEXPIRE:
1422 // return SADB_X_SPDEXPIRE;
1424 pr_err("pfkey: Unknown policy event %d\n", event);
1431 static inline int event2keytype(int event)
1434 case XFRM_MSG_DELSA:
1436 case XFRM_MSG_NEWSA:
1438 case XFRM_MSG_UPDSA:
1440 case XFRM_MSG_EXPIRE:
1443 pr_err("pfkey: Unknown SA event %d\n", event);
1451 static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
1453 struct sk_buff *skb;
1454 struct sadb_msg *hdr;
1456 skb = pfkey_xfrm_state2msg(x);
1459 return PTR_ERR(skb);
1461 hdr = (struct sadb_msg *) skb->data;
1462 hdr->sadb_msg_version = PF_KEY_V2;
1463 hdr->sadb_msg_type = event2keytype(c->event);
1464 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1465 hdr->sadb_msg_errno = 0;
1466 hdr->sadb_msg_reserved = 0;
1467 hdr->sadb_msg_seq = c->seq;
1468 hdr->sadb_msg_pid = c->portid;
1470 pfkey_broadcast(skb, BROADCAST_ALL, NULL, xs_net(x));
1475 static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1477 struct net *net = sock_net(sk);
1478 struct xfrm_state *x;
1482 x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1487 if (hdr->sadb_msg_type == SADB_ADD)
1488 err = xfrm_state_add(x);
1490 err = xfrm_state_update(x);
1492 xfrm_audit_state_add(x, err ? 0 : 1, true);
1495 x->km.state = XFRM_STATE_DEAD;
1496 __xfrm_state_put(x);
1500 if (hdr->sadb_msg_type == SADB_ADD)
1501 c.event = XFRM_MSG_NEWSA;
1503 c.event = XFRM_MSG_UPDSA;
1504 c.seq = hdr->sadb_msg_seq;
1505 c.portid = hdr->sadb_msg_pid;
1506 km_state_notify(x, &c);
1512 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1514 struct net *net = sock_net(sk);
1515 struct xfrm_state *x;
1519 if (!ext_hdrs[SADB_EXT_SA-1] ||
1520 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1521 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1524 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1528 if ((err = security_xfrm_state_delete(x)))
1531 if (xfrm_state_kern(x)) {
1536 err = xfrm_state_delete(x);
1541 c.seq = hdr->sadb_msg_seq;
1542 c.portid = hdr->sadb_msg_pid;
1543 c.event = XFRM_MSG_DELSA;
1544 km_state_notify(x, &c);
1546 xfrm_audit_state_delete(x, err ? 0 : 1, true);
1552 static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1554 struct net *net = sock_net(sk);
1556 struct sk_buff *out_skb;
1557 struct sadb_msg *out_hdr;
1558 struct xfrm_state *x;
1560 if (!ext_hdrs[SADB_EXT_SA-1] ||
1561 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1562 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1565 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1569 out_skb = pfkey_xfrm_state2msg(x);
1570 proto = x->id.proto;
1572 if (IS_ERR(out_skb))
1573 return PTR_ERR(out_skb);
1575 out_hdr = (struct sadb_msg *) out_skb->data;
1576 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1577 out_hdr->sadb_msg_type = SADB_GET;
1578 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1579 out_hdr->sadb_msg_errno = 0;
1580 out_hdr->sadb_msg_reserved = 0;
1581 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1582 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1583 pfkey_broadcast(out_skb, BROADCAST_ONE, sk, sock_net(sk));
1588 static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
1591 struct sk_buff *skb;
1592 struct sadb_msg *hdr;
1593 int len, auth_len, enc_len, i;
1595 auth_len = xfrm_count_pfkey_auth_supported();
1597 auth_len *= sizeof(struct sadb_alg);
1598 auth_len += sizeof(struct sadb_supported);
1601 enc_len = xfrm_count_pfkey_enc_supported();
1603 enc_len *= sizeof(struct sadb_alg);
1604 enc_len += sizeof(struct sadb_supported);
1607 len = enc_len + auth_len + sizeof(struct sadb_msg);
1609 skb = alloc_skb(len + 16, allocation);
1613 hdr = skb_put(skb, sizeof(*hdr));
1614 pfkey_hdr_dup(hdr, orig);
1615 hdr->sadb_msg_errno = 0;
1616 hdr->sadb_msg_len = len / sizeof(uint64_t);
1619 struct sadb_supported *sp;
1620 struct sadb_alg *ap;
1622 sp = skb_put(skb, auth_len);
1623 ap = (struct sadb_alg *) (sp + 1);
1625 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1626 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1628 for (i = 0; ; i++) {
1629 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1632 if (!aalg->pfkey_supported)
1634 if (aalg->available)
1640 struct sadb_supported *sp;
1641 struct sadb_alg *ap;
1643 sp = skb_put(skb, enc_len);
1644 ap = (struct sadb_alg *) (sp + 1);
1646 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1647 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1649 for (i = 0; ; i++) {
1650 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1653 if (!ealg->pfkey_supported)
1655 if (ealg->available)
1664 static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1666 struct pfkey_sock *pfk = pfkey_sk(sk);
1667 struct sk_buff *supp_skb;
1669 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1672 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1673 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1675 pfk->registered |= (1<<hdr->sadb_msg_satype);
1680 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1682 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1683 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1688 pfkey_broadcast(supp_skb, BROADCAST_REGISTERED, sk, sock_net(sk));
1693 static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
1695 struct sk_buff *skb;
1696 struct sadb_msg *hdr;
1698 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1702 hdr = skb_put_data(skb, ihdr, sizeof(struct sadb_msg));
1703 hdr->sadb_msg_errno = (uint8_t) 0;
1704 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1706 return pfkey_broadcast(skb, BROADCAST_ONE, sk, sock_net(sk));
1709 static int key_notify_sa_flush(const struct km_event *c)
1711 struct sk_buff *skb;
1712 struct sadb_msg *hdr;
1714 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1717 hdr = skb_put(skb, sizeof(struct sadb_msg));
1718 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1719 hdr->sadb_msg_type = SADB_FLUSH;
1720 hdr->sadb_msg_seq = c->seq;
1721 hdr->sadb_msg_pid = c->portid;
1722 hdr->sadb_msg_version = PF_KEY_V2;
1723 hdr->sadb_msg_errno = (uint8_t) 0;
1724 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1725 hdr->sadb_msg_reserved = 0;
1727 pfkey_broadcast(skb, BROADCAST_ALL, NULL, c->net);
1732 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1734 struct net *net = sock_net(sk);
1739 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1743 err = xfrm_state_flush(net, proto, true);
1744 err2 = unicast_flush_resp(sk, hdr);
1746 if (err == -ESRCH) /* empty table - go quietly */
1748 return err ? err : err2;
1751 c.data.proto = proto;
1752 c.seq = hdr->sadb_msg_seq;
1753 c.portid = hdr->sadb_msg_pid;
1754 c.event = XFRM_MSG_FLUSHSA;
1756 km_state_notify(NULL, &c);
1761 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1763 struct pfkey_sock *pfk = ptr;
1764 struct sk_buff *out_skb;
1765 struct sadb_msg *out_hdr;
1767 if (!pfkey_can_dump(&pfk->sk))
1770 out_skb = pfkey_xfrm_state2msg(x);
1771 if (IS_ERR(out_skb))
1772 return PTR_ERR(out_skb);
1774 out_hdr = (struct sadb_msg *) out_skb->data;
1775 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1776 out_hdr->sadb_msg_type = SADB_DUMP;
1777 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1778 out_hdr->sadb_msg_errno = 0;
1779 out_hdr->sadb_msg_reserved = 0;
1780 out_hdr->sadb_msg_seq = count + 1;
1781 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
1784 pfkey_broadcast(pfk->dump.skb, BROADCAST_ONE,
1785 &pfk->sk, sock_net(&pfk->sk));
1786 pfk->dump.skb = out_skb;
1791 static int pfkey_dump_sa(struct pfkey_sock *pfk)
1793 struct net *net = sock_net(&pfk->sk);
1794 return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1797 static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1799 struct net *net = sock_net(&pfk->sk);
1801 xfrm_state_walk_done(&pfk->dump.u.state, net);
1804 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1807 struct xfrm_address_filter *filter = NULL;
1808 struct pfkey_sock *pfk = pfkey_sk(sk);
1810 mutex_lock(&pfk->dump_lock);
1811 if (pfk->dump.dump != NULL) {
1812 mutex_unlock(&pfk->dump_lock);
1816 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1818 mutex_unlock(&pfk->dump_lock);
1822 if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
1823 struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
1825 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
1826 if (filter == NULL) {
1827 mutex_unlock(&pfk->dump_lock);
1831 memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr,
1832 sizeof(xfrm_address_t));
1833 memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr,
1834 sizeof(xfrm_address_t));
1835 filter->family = xfilter->sadb_x_filter_family;
1836 filter->splen = xfilter->sadb_x_filter_splen;
1837 filter->dplen = xfilter->sadb_x_filter_dplen;
1840 pfk->dump.msg_version = hdr->sadb_msg_version;
1841 pfk->dump.msg_portid = hdr->sadb_msg_pid;
1842 pfk->dump.dump = pfkey_dump_sa;
1843 pfk->dump.done = pfkey_dump_sa_done;
1844 xfrm_state_walk_init(&pfk->dump.u.state, proto, filter);
1845 mutex_unlock(&pfk->dump_lock);
1847 return pfkey_do_dump(pfk);
1850 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1852 struct pfkey_sock *pfk = pfkey_sk(sk);
1853 int satype = hdr->sadb_msg_satype;
1854 bool reset_errno = false;
1856 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1858 if (satype != 0 && satype != 1)
1860 pfk->promisc = satype;
1862 if (reset_errno && skb_cloned(skb))
1863 skb = skb_copy(skb, GFP_KERNEL);
1865 skb = skb_clone(skb, GFP_KERNEL);
1867 if (reset_errno && skb) {
1868 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1869 new_hdr->sadb_msg_errno = 0;
1872 pfkey_broadcast(skb, BROADCAST_ALL, NULL, sock_net(sk));
1876 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1879 u32 reqid = *(u32*)ptr;
1881 for (i=0; i<xp->xfrm_nr; i++) {
1882 if (xp->xfrm_vec[i].reqid == reqid)
1888 static u32 gen_reqid(struct net *net)
1890 struct xfrm_policy_walk walk;
1893 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1899 reqid = IPSEC_MANUAL_REQID_MAX+1;
1900 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1901 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1902 xfrm_policy_walk_done(&walk, net);
1905 } while (reqid != start);
1910 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1912 struct net *net = xp_net(xp);
1913 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1916 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1919 if (rq->sadb_x_ipsecrequest_mode == 0)
1922 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1923 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1926 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1928 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1929 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1930 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1932 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1936 /* addresses present only in tunnel mode */
1937 if (t->mode == XFRM_MODE_TUNNEL) {
1940 err = parse_sockaddr_pair(
1941 (struct sockaddr *)(rq + 1),
1942 rq->sadb_x_ipsecrequest_len - sizeof(*rq),
1943 &t->saddr, &t->id.daddr, &t->encap_family);
1947 t->encap_family = xp->family;
1949 /* No way to set this via kame pfkey */
1956 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1959 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1960 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1962 if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
1965 while (len >= sizeof(*rq)) {
1966 if (len < rq->sadb_x_ipsecrequest_len ||
1967 rq->sadb_x_ipsecrequest_len < sizeof(*rq))
1970 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1972 len -= rq->sadb_x_ipsecrequest_len;
1973 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1978 static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
1980 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1983 int len = sizeof(struct sadb_x_sec_ctx);
1984 len += xfrm_ctx->ctx_len;
1985 return PFKEY_ALIGN8(len);
1990 static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
1992 const struct xfrm_tmpl *t;
1993 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1997 for (i=0; i<xp->xfrm_nr; i++) {
1998 t = xp->xfrm_vec + i;
1999 socklen += pfkey_sockaddr_len(t->encap_family);
2002 return sizeof(struct sadb_msg) +
2003 (sizeof(struct sadb_lifetime) * 3) +
2004 (sizeof(struct sadb_address) * 2) +
2005 (sockaddr_size * 2) +
2006 sizeof(struct sadb_x_policy) +
2007 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
2009 pfkey_xfrm_policy2sec_ctx_size(xp);
2012 static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
2014 struct sk_buff *skb;
2017 size = pfkey_xfrm_policy2msg_size(xp);
2019 skb = alloc_skb(size + 16, GFP_ATOMIC);
2021 return ERR_PTR(-ENOBUFS);
2026 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
2028 struct sadb_msg *hdr;
2029 struct sadb_address *addr;
2030 struct sadb_lifetime *lifetime;
2031 struct sadb_x_policy *pol;
2032 struct sadb_x_sec_ctx *sec_ctx;
2033 struct xfrm_sec_ctx *xfrm_ctx;
2036 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2037 int socklen = pfkey_sockaddr_len(xp->family);
2039 size = pfkey_xfrm_policy2msg_size(xp);
2041 /* call should fill header later */
2042 hdr = skb_put(skb, sizeof(struct sadb_msg));
2043 memset(hdr, 0, size); /* XXX do we need this ? */
2046 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
2047 addr->sadb_address_len =
2048 (sizeof(struct sadb_address)+sockaddr_size)/
2050 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2051 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2052 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2053 addr->sadb_address_reserved = 0;
2054 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2056 (struct sockaddr *) (addr + 1),
2061 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
2062 addr->sadb_address_len =
2063 (sizeof(struct sadb_address)+sockaddr_size)/
2065 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2066 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2067 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2068 addr->sadb_address_reserved = 0;
2070 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2071 (struct sockaddr *) (addr + 1),
2075 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2076 lifetime->sadb_lifetime_len =
2077 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2078 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2079 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2080 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2081 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2082 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2084 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2085 lifetime->sadb_lifetime_len =
2086 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2087 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2088 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2089 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2090 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2091 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2093 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2094 lifetime->sadb_lifetime_len =
2095 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2096 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2097 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2098 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2099 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2100 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2102 pol = skb_put(skb, sizeof(struct sadb_x_policy));
2103 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2104 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2105 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2106 if (xp->action == XFRM_POLICY_ALLOW) {
2108 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2110 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2112 pol->sadb_x_policy_dir = dir+1;
2113 pol->sadb_x_policy_reserved = 0;
2114 pol->sadb_x_policy_id = xp->index;
2115 pol->sadb_x_policy_priority = xp->priority;
2117 for (i=0; i<xp->xfrm_nr; i++) {
2118 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
2119 struct sadb_x_ipsecrequest *rq;
2123 req_size = sizeof(struct sadb_x_ipsecrequest);
2124 if (t->mode == XFRM_MODE_TUNNEL) {
2125 socklen = pfkey_sockaddr_len(t->encap_family);
2126 req_size += socklen * 2;
2130 rq = skb_put(skb, req_size);
2131 pol->sadb_x_policy_len += req_size/8;
2132 memset(rq, 0, sizeof(*rq));
2133 rq->sadb_x_ipsecrequest_len = req_size;
2134 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2135 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2137 rq->sadb_x_ipsecrequest_mode = mode;
2138 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2140 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2142 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2143 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2145 if (t->mode == XFRM_MODE_TUNNEL) {
2146 u8 *sa = (void *)(rq + 1);
2147 pfkey_sockaddr_fill(&t->saddr, 0,
2148 (struct sockaddr *)sa,
2150 pfkey_sockaddr_fill(&t->id.daddr, 0,
2151 (struct sockaddr *) (sa + socklen),
2156 /* security context */
2157 if ((xfrm_ctx = xp->security)) {
2158 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2160 sec_ctx = skb_put(skb, ctx_size);
2161 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2162 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2163 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2164 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2165 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2166 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2170 hdr->sadb_msg_len = size / sizeof(uint64_t);
2171 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2176 static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2178 struct sk_buff *out_skb;
2179 struct sadb_msg *out_hdr;
2182 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2183 if (IS_ERR(out_skb))
2184 return PTR_ERR(out_skb);
2186 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2190 out_hdr = (struct sadb_msg *) out_skb->data;
2191 out_hdr->sadb_msg_version = PF_KEY_V2;
2193 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2194 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2196 out_hdr->sadb_msg_type = event2poltype(c->event);
2197 out_hdr->sadb_msg_errno = 0;
2198 out_hdr->sadb_msg_seq = c->seq;
2199 out_hdr->sadb_msg_pid = c->portid;
2200 pfkey_broadcast(out_skb, BROADCAST_ALL, NULL, xp_net(xp));
2205 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2207 struct net *net = sock_net(sk);
2209 struct sadb_lifetime *lifetime;
2210 struct sadb_address *sa;
2211 struct sadb_x_policy *pol;
2212 struct xfrm_policy *xp;
2214 struct sadb_x_sec_ctx *sec_ctx;
2216 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2217 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2218 !ext_hdrs[SADB_X_EXT_POLICY-1])
2221 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2222 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2224 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2227 xp = xfrm_policy_alloc(net, GFP_KERNEL);
2231 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2232 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2233 xp->priority = pol->sadb_x_policy_priority;
2235 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2236 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2237 xp->selector.family = xp->family;
2238 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2239 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2240 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2241 if (xp->selector.sport)
2242 xp->selector.sport_mask = htons(0xffff);
2244 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2245 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2246 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2248 /* Amusing, we set this twice. KAME apps appear to set same value
2249 * in both addresses.
2251 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2253 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2254 if (xp->selector.dport)
2255 xp->selector.dport_mask = htons(0xffff);
2257 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2258 if (sec_ctx != NULL) {
2259 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2266 err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL);
2273 xp->lft.soft_byte_limit = XFRM_INF;
2274 xp->lft.hard_byte_limit = XFRM_INF;
2275 xp->lft.soft_packet_limit = XFRM_INF;
2276 xp->lft.hard_packet_limit = XFRM_INF;
2277 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2278 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2279 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2280 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2281 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2283 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2284 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2285 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2286 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2287 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2290 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2291 (err = parse_ipsecrequests(xp, pol)) < 0)
2294 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2295 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2297 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
2302 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2303 c.event = XFRM_MSG_UPDPOLICY;
2305 c.event = XFRM_MSG_NEWPOLICY;
2307 c.seq = hdr->sadb_msg_seq;
2308 c.portid = hdr->sadb_msg_pid;
2310 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2316 xfrm_policy_destroy(xp);
2320 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2322 struct net *net = sock_net(sk);
2324 struct sadb_address *sa;
2325 struct sadb_x_policy *pol;
2326 struct xfrm_policy *xp;
2327 struct xfrm_selector sel;
2329 struct sadb_x_sec_ctx *sec_ctx;
2330 struct xfrm_sec_ctx *pol_ctx = NULL;
2332 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2333 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2334 !ext_hdrs[SADB_X_EXT_POLICY-1])
2337 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2338 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2341 memset(&sel, 0, sizeof(sel));
2343 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2344 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2345 sel.prefixlen_s = sa->sadb_address_prefixlen;
2346 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2347 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2349 sel.sport_mask = htons(0xffff);
2351 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2352 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2353 sel.prefixlen_d = sa->sadb_address_prefixlen;
2354 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2355 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2357 sel.dport_mask = htons(0xffff);
2359 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2360 if (sec_ctx != NULL) {
2361 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2366 err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL);
2372 xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2373 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2375 security_xfrm_policy_free(pol_ctx);
2379 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2384 c.seq = hdr->sadb_msg_seq;
2385 c.portid = hdr->sadb_msg_pid;
2387 c.event = XFRM_MSG_DELPOLICY;
2388 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2393 xfrm_garbage_collect(net);
2397 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
2400 struct sk_buff *out_skb;
2401 struct sadb_msg *out_hdr;
2404 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2405 if (IS_ERR(out_skb)) {
2406 err = PTR_ERR(out_skb);
2409 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2413 out_hdr = (struct sadb_msg *) out_skb->data;
2414 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2415 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2416 out_hdr->sadb_msg_satype = 0;
2417 out_hdr->sadb_msg_errno = 0;
2418 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2419 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2420 pfkey_broadcast(out_skb, BROADCAST_ONE, sk, xp_net(xp));
2427 static int pfkey_sockaddr_pair_size(sa_family_t family)
2429 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2432 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2433 xfrm_address_t *saddr, xfrm_address_t *daddr,
2438 if (ext_len < 2 || ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2441 af = pfkey_sockaddr_extract(sa, saddr);
2445 socklen = pfkey_sockaddr_len(af);
2446 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2454 #ifdef CONFIG_NET_KEY_MIGRATE
2455 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2456 struct xfrm_migrate *m)
2459 struct sadb_x_ipsecrequest *rq2;
2462 if (len < sizeof(*rq1) ||
2463 len < rq1->sadb_x_ipsecrequest_len ||
2464 rq1->sadb_x_ipsecrequest_len < sizeof(*rq1))
2468 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2469 rq1->sadb_x_ipsecrequest_len - sizeof(*rq1),
2470 &m->old_saddr, &m->old_daddr,
2475 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2476 len -= rq1->sadb_x_ipsecrequest_len;
2478 if (len <= sizeof(*rq2) ||
2479 len < rq2->sadb_x_ipsecrequest_len ||
2480 rq2->sadb_x_ipsecrequest_len < sizeof(*rq2))
2484 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2485 rq2->sadb_x_ipsecrequest_len - sizeof(*rq2),
2486 &m->new_saddr, &m->new_daddr,
2491 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2492 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2493 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2496 m->proto = rq1->sadb_x_ipsecrequest_proto;
2497 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2500 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2502 return ((int)(rq1->sadb_x_ipsecrequest_len +
2503 rq2->sadb_x_ipsecrequest_len));
2506 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2507 const struct sadb_msg *hdr, void * const *ext_hdrs)
2509 int i, len, ret, err = -EINVAL;
2511 struct sadb_address *sa;
2512 struct sadb_x_kmaddress *kma;
2513 struct sadb_x_policy *pol;
2514 struct sadb_x_ipsecrequest *rq;
2515 struct xfrm_selector sel;
2516 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2517 struct xfrm_kmaddress k;
2518 struct net *net = sock_net(sk);
2520 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2521 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2522 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2527 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2528 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2530 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2536 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2537 k.reserved = kma->sadb_x_kmaddress_reserved;
2538 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2539 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2540 &k.local, &k.remote, &k.family);
2547 dir = pol->sadb_x_policy_dir - 1;
2548 memset(&sel, 0, sizeof(sel));
2550 /* set source address info of selector */
2551 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2552 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2553 sel.prefixlen_s = sa->sadb_address_prefixlen;
2554 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2555 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2557 sel.sport_mask = htons(0xffff);
2559 /* set destination address info of selector */
2560 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
2561 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2562 sel.prefixlen_d = sa->sadb_address_prefixlen;
2563 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2564 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2566 sel.dport_mask = htons(0xffff);
2568 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2570 /* extract ipsecrequests */
2572 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2574 while (len > 0 && i < XFRM_MAX_DEPTH) {
2575 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2580 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2586 if (!i || len > 0) {
2591 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2592 kma ? &k : NULL, net);
2598 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2599 const struct sadb_msg *hdr, void * const *ext_hdrs)
2601 return -ENOPROTOOPT;
2606 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2608 struct net *net = sock_net(sk);
2610 int err = 0, delete;
2611 struct sadb_x_policy *pol;
2612 struct xfrm_policy *xp;
2615 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2618 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2619 if (dir >= XFRM_POLICY_MAX)
2622 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2623 xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2624 dir, pol->sadb_x_policy_id, delete, &err);
2629 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2633 c.seq = hdr->sadb_msg_seq;
2634 c.portid = hdr->sadb_msg_pid;
2636 c.event = XFRM_MSG_DELPOLICY;
2637 km_policy_notify(xp, dir, &c);
2639 err = key_pol_get_resp(sk, xp, hdr, dir);
2644 if (delete && err == 0)
2645 xfrm_garbage_collect(net);
2649 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2651 struct pfkey_sock *pfk = ptr;
2652 struct sk_buff *out_skb;
2653 struct sadb_msg *out_hdr;
2656 if (!pfkey_can_dump(&pfk->sk))
2659 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2660 if (IS_ERR(out_skb))
2661 return PTR_ERR(out_skb);
2663 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2667 out_hdr = (struct sadb_msg *) out_skb->data;
2668 out_hdr->sadb_msg_version = pfk->dump.msg_version;
2669 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2670 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2671 out_hdr->sadb_msg_errno = 0;
2672 out_hdr->sadb_msg_seq = count + 1;
2673 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
2676 pfkey_broadcast(pfk->dump.skb, BROADCAST_ONE,
2677 &pfk->sk, sock_net(&pfk->sk));
2678 pfk->dump.skb = out_skb;
2683 static int pfkey_dump_sp(struct pfkey_sock *pfk)
2685 struct net *net = sock_net(&pfk->sk);
2686 return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2689 static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2691 struct net *net = sock_net((struct sock *)pfk);
2693 xfrm_policy_walk_done(&pfk->dump.u.policy, net);
2696 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2698 struct pfkey_sock *pfk = pfkey_sk(sk);
2700 mutex_lock(&pfk->dump_lock);
2701 if (pfk->dump.dump != NULL) {
2702 mutex_unlock(&pfk->dump_lock);
2706 pfk->dump.msg_version = hdr->sadb_msg_version;
2707 pfk->dump.msg_portid = hdr->sadb_msg_pid;
2708 pfk->dump.dump = pfkey_dump_sp;
2709 pfk->dump.done = pfkey_dump_sp_done;
2710 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2711 mutex_unlock(&pfk->dump_lock);
2713 return pfkey_do_dump(pfk);
2716 static int key_notify_policy_flush(const struct km_event *c)
2718 struct sk_buff *skb_out;
2719 struct sadb_msg *hdr;
2721 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2724 hdr = skb_put(skb_out, sizeof(struct sadb_msg));
2725 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2726 hdr->sadb_msg_seq = c->seq;
2727 hdr->sadb_msg_pid = c->portid;
2728 hdr->sadb_msg_version = PF_KEY_V2;
2729 hdr->sadb_msg_errno = (uint8_t) 0;
2730 hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2731 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2732 hdr->sadb_msg_reserved = 0;
2733 pfkey_broadcast(skb_out, BROADCAST_ALL, NULL, c->net);
2738 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2740 struct net *net = sock_net(sk);
2744 err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, true);
2745 err2 = unicast_flush_resp(sk, hdr);
2747 if (err == -ESRCH) /* empty table - old silent behavior */
2752 c.data.type = XFRM_POLICY_TYPE_MAIN;
2753 c.event = XFRM_MSG_FLUSHPOLICY;
2754 c.portid = hdr->sadb_msg_pid;
2755 c.seq = hdr->sadb_msg_seq;
2757 km_policy_notify(NULL, 0, &c);
2762 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2763 const struct sadb_msg *hdr, void * const *ext_hdrs);
2764 static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2765 [SADB_RESERVED] = pfkey_reserved,
2766 [SADB_GETSPI] = pfkey_getspi,
2767 [SADB_UPDATE] = pfkey_add,
2768 [SADB_ADD] = pfkey_add,
2769 [SADB_DELETE] = pfkey_delete,
2770 [SADB_GET] = pfkey_get,
2771 [SADB_ACQUIRE] = pfkey_acquire,
2772 [SADB_REGISTER] = pfkey_register,
2773 [SADB_EXPIRE] = NULL,
2774 [SADB_FLUSH] = pfkey_flush,
2775 [SADB_DUMP] = pfkey_dump,
2776 [SADB_X_PROMISC] = pfkey_promisc,
2777 [SADB_X_PCHANGE] = NULL,
2778 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2779 [SADB_X_SPDADD] = pfkey_spdadd,
2780 [SADB_X_SPDDELETE] = pfkey_spddelete,
2781 [SADB_X_SPDGET] = pfkey_spdget,
2782 [SADB_X_SPDACQUIRE] = NULL,
2783 [SADB_X_SPDDUMP] = pfkey_spddump,
2784 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2785 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2786 [SADB_X_SPDDELETE2] = pfkey_spdget,
2787 [SADB_X_MIGRATE] = pfkey_migrate,
2790 static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
2792 void *ext_hdrs[SADB_EXT_MAX];
2795 pfkey_broadcast(skb_clone(skb, GFP_KERNEL),
2796 BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
2798 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2799 err = parse_exthdrs(skb, hdr, ext_hdrs);
2802 if (pfkey_funcs[hdr->sadb_msg_type])
2803 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2808 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2810 struct sadb_msg *hdr = NULL;
2812 if (skb->len < sizeof(*hdr)) {
2815 hdr = (struct sadb_msg *) skb->data;
2816 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2817 hdr->sadb_msg_reserved != 0 ||
2818 (hdr->sadb_msg_type <= SADB_RESERVED ||
2819 hdr->sadb_msg_type > SADB_MAX)) {
2822 } else if (hdr->sadb_msg_len != (skb->len /
2823 sizeof(uint64_t)) ||
2824 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2825 sizeof(uint64_t))) {
2835 static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2836 const struct xfrm_algo_desc *d)
2838 unsigned int id = d->desc.sadb_alg_id;
2840 if (id >= sizeof(t->aalgos) * 8)
2843 return (t->aalgos >> id) & 1;
2846 static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2847 const struct xfrm_algo_desc *d)
2849 unsigned int id = d->desc.sadb_alg_id;
2851 if (id >= sizeof(t->ealgos) * 8)
2854 return (t->ealgos >> id) & 1;
2857 static int count_ah_combs(const struct xfrm_tmpl *t)
2861 for (i = 0; ; i++) {
2862 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2865 if (!aalg->pfkey_supported)
2867 if (aalg_tmpl_set(t, aalg) && aalg->available)
2868 sz += sizeof(struct sadb_comb);
2870 return sz + sizeof(struct sadb_prop);
2873 static int count_esp_combs(const struct xfrm_tmpl *t)
2877 for (i = 0; ; i++) {
2878 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2882 if (!ealg->pfkey_supported)
2885 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2888 for (k = 1; ; k++) {
2889 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2893 if (!aalg->pfkey_supported)
2896 if (aalg_tmpl_set(t, aalg) && aalg->available)
2897 sz += sizeof(struct sadb_comb);
2900 return sz + sizeof(struct sadb_prop);
2903 static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2905 struct sadb_prop *p;
2908 p = skb_put(skb, sizeof(struct sadb_prop));
2909 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2910 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2911 p->sadb_prop_replay = 32;
2912 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2914 for (i = 0; ; i++) {
2915 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2919 if (!aalg->pfkey_supported)
2922 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2923 struct sadb_comb *c;
2924 c = skb_put_zero(skb, sizeof(struct sadb_comb));
2925 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2926 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2927 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2928 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2929 c->sadb_comb_hard_addtime = 24*60*60;
2930 c->sadb_comb_soft_addtime = 20*60*60;
2931 c->sadb_comb_hard_usetime = 8*60*60;
2932 c->sadb_comb_soft_usetime = 7*60*60;
2937 static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2939 struct sadb_prop *p;
2942 p = skb_put(skb, sizeof(struct sadb_prop));
2943 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2944 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2945 p->sadb_prop_replay = 32;
2946 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2949 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2953 if (!ealg->pfkey_supported)
2956 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2959 for (k = 1; ; k++) {
2960 struct sadb_comb *c;
2961 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2964 if (!aalg->pfkey_supported)
2966 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2968 c = skb_put(skb, sizeof(struct sadb_comb));
2969 memset(c, 0, sizeof(*c));
2970 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2971 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2972 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2973 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2974 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2975 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2976 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2977 c->sadb_comb_hard_addtime = 24*60*60;
2978 c->sadb_comb_soft_addtime = 20*60*60;
2979 c->sadb_comb_hard_usetime = 8*60*60;
2980 c->sadb_comb_soft_usetime = 7*60*60;
2985 static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
2990 static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
2992 struct sk_buff *out_skb;
2993 struct sadb_msg *out_hdr;
2997 hard = c->data.hard;
3003 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
3004 if (IS_ERR(out_skb))
3005 return PTR_ERR(out_skb);
3007 out_hdr = (struct sadb_msg *) out_skb->data;
3008 out_hdr->sadb_msg_version = PF_KEY_V2;
3009 out_hdr->sadb_msg_type = SADB_EXPIRE;
3010 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3011 out_hdr->sadb_msg_errno = 0;
3012 out_hdr->sadb_msg_reserved = 0;
3013 out_hdr->sadb_msg_seq = 0;
3014 out_hdr->sadb_msg_pid = 0;
3016 pfkey_broadcast(out_skb, BROADCAST_REGISTERED, NULL, xs_net(x));
3020 static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
3022 struct net *net = x ? xs_net(x) : c->net;
3023 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3025 if (atomic_read(&net_pfkey->socks_nr) == 0)
3029 case XFRM_MSG_EXPIRE:
3030 return key_notify_sa_expire(x, c);
3031 case XFRM_MSG_DELSA:
3032 case XFRM_MSG_NEWSA:
3033 case XFRM_MSG_UPDSA:
3034 return key_notify_sa(x, c);
3035 case XFRM_MSG_FLUSHSA:
3036 return key_notify_sa_flush(c);
3037 case XFRM_MSG_NEWAE: /* not yet supported */
3040 pr_err("pfkey: Unknown SA event %d\n", c->event);
3047 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3049 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3053 case XFRM_MSG_POLEXPIRE:
3054 return key_notify_policy_expire(xp, c);
3055 case XFRM_MSG_DELPOLICY:
3056 case XFRM_MSG_NEWPOLICY:
3057 case XFRM_MSG_UPDPOLICY:
3058 return key_notify_policy(xp, dir, c);
3059 case XFRM_MSG_FLUSHPOLICY:
3060 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3062 return key_notify_policy_flush(c);
3064 pr_err("pfkey: Unknown policy event %d\n", c->event);
3071 static u32 get_acqseq(void)
3074 static atomic_t acqseq;
3077 res = atomic_inc_return(&acqseq);
3082 static bool pfkey_is_alive(const struct km_event *c)
3084 struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id);
3086 bool is_alive = false;
3089 sk_for_each_rcu(sk, &net_pfkey->table) {
3090 if (pfkey_sk(sk)->registered) {
3100 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
3102 struct sk_buff *skb;
3103 struct sadb_msg *hdr;
3104 struct sadb_address *addr;
3105 struct sadb_x_policy *pol;
3108 struct sadb_x_sec_ctx *sec_ctx;
3109 struct xfrm_sec_ctx *xfrm_ctx;
3112 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3116 size = sizeof(struct sadb_msg) +
3117 (sizeof(struct sadb_address) * 2) +
3118 (sockaddr_size * 2) +
3119 sizeof(struct sadb_x_policy);
3121 if (x->id.proto == IPPROTO_AH)
3122 size += count_ah_combs(t);
3123 else if (x->id.proto == IPPROTO_ESP)
3124 size += count_esp_combs(t);
3126 if ((xfrm_ctx = x->security)) {
3127 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3128 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3131 skb = alloc_skb(size + 16, GFP_ATOMIC);
3135 hdr = skb_put(skb, sizeof(struct sadb_msg));
3136 hdr->sadb_msg_version = PF_KEY_V2;
3137 hdr->sadb_msg_type = SADB_ACQUIRE;
3138 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3139 hdr->sadb_msg_len = size / sizeof(uint64_t);
3140 hdr->sadb_msg_errno = 0;
3141 hdr->sadb_msg_reserved = 0;
3142 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3143 hdr->sadb_msg_pid = 0;
3146 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3147 addr->sadb_address_len =
3148 (sizeof(struct sadb_address)+sockaddr_size)/
3150 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3151 addr->sadb_address_proto = 0;
3152 addr->sadb_address_reserved = 0;
3153 addr->sadb_address_prefixlen =
3154 pfkey_sockaddr_fill(&x->props.saddr, 0,
3155 (struct sockaddr *) (addr + 1),
3157 if (!addr->sadb_address_prefixlen)
3161 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3162 addr->sadb_address_len =
3163 (sizeof(struct sadb_address)+sockaddr_size)/
3165 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3166 addr->sadb_address_proto = 0;
3167 addr->sadb_address_reserved = 0;
3168 addr->sadb_address_prefixlen =
3169 pfkey_sockaddr_fill(&x->id.daddr, 0,
3170 (struct sockaddr *) (addr + 1),
3172 if (!addr->sadb_address_prefixlen)
3175 pol = skb_put(skb, sizeof(struct sadb_x_policy));
3176 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3177 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3178 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3179 pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
3180 pol->sadb_x_policy_reserved = 0;
3181 pol->sadb_x_policy_id = xp->index;
3182 pol->sadb_x_policy_priority = xp->priority;
3184 /* Set sadb_comb's. */
3185 if (x->id.proto == IPPROTO_AH)
3186 dump_ah_combs(skb, t);
3187 else if (x->id.proto == IPPROTO_ESP)
3188 dump_esp_combs(skb, t);
3190 /* security context */
3192 sec_ctx = skb_put(skb,
3193 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3194 sec_ctx->sadb_x_sec_len =
3195 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3196 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3197 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3198 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3199 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3200 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3204 return pfkey_broadcast(skb, BROADCAST_REGISTERED, NULL, xs_net(x));
3207 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3208 u8 *data, int len, int *dir)
3210 struct net *net = sock_net(sk);
3211 struct xfrm_policy *xp;
3212 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3213 struct sadb_x_sec_ctx *sec_ctx;
3215 switch (sk->sk_family) {
3217 if (opt != IP_IPSEC_POLICY) {
3222 #if IS_ENABLED(CONFIG_IPV6)
3224 if (opt != IPV6_IPSEC_POLICY) {
3237 if (len < sizeof(struct sadb_x_policy) ||
3238 pol->sadb_x_policy_len*8 > len ||
3239 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3240 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3243 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3249 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3250 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3252 xp->lft.soft_byte_limit = XFRM_INF;
3253 xp->lft.hard_byte_limit = XFRM_INF;
3254 xp->lft.soft_packet_limit = XFRM_INF;
3255 xp->lft.hard_packet_limit = XFRM_INF;
3256 xp->family = sk->sk_family;
3259 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3260 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3263 /* security context too */
3264 if (len >= (pol->sadb_x_policy_len*8 +
3265 sizeof(struct sadb_x_sec_ctx))) {
3266 char *p = (char *)pol;
3267 struct xfrm_user_sec_ctx *uctx;
3269 p += pol->sadb_x_policy_len*8;
3270 sec_ctx = (struct sadb_x_sec_ctx *)p;
3271 if (len < pol->sadb_x_policy_len*8 +
3272 sec_ctx->sadb_x_sec_len*8) {
3276 if ((*dir = verify_sec_ctx_len(p)))
3278 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC);
3279 *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC);
3286 *dir = pol->sadb_x_policy_dir-1;
3291 xfrm_policy_destroy(xp);
3295 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3297 struct sk_buff *skb;
3298 struct sadb_msg *hdr;
3300 struct sadb_address *addr;
3301 struct sadb_x_nat_t_port *n_port;
3304 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3305 struct xfrm_encap_tmpl *natt = NULL;
3307 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3319 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3321 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3322 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3325 size = sizeof(struct sadb_msg) +
3326 sizeof(struct sadb_sa) +
3327 (sizeof(struct sadb_address) * 2) +
3328 (sockaddr_size * 2) +
3329 (sizeof(struct sadb_x_nat_t_port) * 2);
3331 skb = alloc_skb(size + 16, GFP_ATOMIC);
3335 hdr = skb_put(skb, sizeof(struct sadb_msg));
3336 hdr->sadb_msg_version = PF_KEY_V2;
3337 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3338 hdr->sadb_msg_satype = satype;
3339 hdr->sadb_msg_len = size / sizeof(uint64_t);
3340 hdr->sadb_msg_errno = 0;
3341 hdr->sadb_msg_reserved = 0;
3342 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3343 hdr->sadb_msg_pid = 0;
3346 sa = skb_put(skb, sizeof(struct sadb_sa));
3347 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3348 sa->sadb_sa_exttype = SADB_EXT_SA;
3349 sa->sadb_sa_spi = x->id.spi;
3350 sa->sadb_sa_replay = 0;
3351 sa->sadb_sa_state = 0;
3352 sa->sadb_sa_auth = 0;
3353 sa->sadb_sa_encrypt = 0;
3354 sa->sadb_sa_flags = 0;
3356 /* ADDRESS_SRC (old addr) */
3357 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3358 addr->sadb_address_len =
3359 (sizeof(struct sadb_address)+sockaddr_size)/
3361 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3362 addr->sadb_address_proto = 0;
3363 addr->sadb_address_reserved = 0;
3364 addr->sadb_address_prefixlen =
3365 pfkey_sockaddr_fill(&x->props.saddr, 0,
3366 (struct sockaddr *) (addr + 1),
3368 if (!addr->sadb_address_prefixlen)
3371 /* NAT_T_SPORT (old port) */
3372 n_port = skb_put(skb, sizeof(*n_port));
3373 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3374 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3375 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3376 n_port->sadb_x_nat_t_port_reserved = 0;
3378 /* ADDRESS_DST (new addr) */
3379 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3380 addr->sadb_address_len =
3381 (sizeof(struct sadb_address)+sockaddr_size)/
3383 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3384 addr->sadb_address_proto = 0;
3385 addr->sadb_address_reserved = 0;
3386 addr->sadb_address_prefixlen =
3387 pfkey_sockaddr_fill(ipaddr, 0,
3388 (struct sockaddr *) (addr + 1),
3390 if (!addr->sadb_address_prefixlen)
3393 /* NAT_T_DPORT (new port) */
3394 n_port = skb_put(skb, sizeof(*n_port));
3395 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3396 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3397 n_port->sadb_x_nat_t_port_port = sport;
3398 n_port->sadb_x_nat_t_port_reserved = 0;
3400 return pfkey_broadcast(skb, BROADCAST_REGISTERED, NULL, xs_net(x));
3403 #ifdef CONFIG_NET_KEY_MIGRATE
3404 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3405 const struct xfrm_selector *sel)
3407 struct sadb_address *addr;
3408 addr = skb_put(skb, sizeof(struct sadb_address) + sasize);
3409 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3410 addr->sadb_address_exttype = type;
3411 addr->sadb_address_proto = sel->proto;
3412 addr->sadb_address_reserved = 0;
3415 case SADB_EXT_ADDRESS_SRC:
3416 addr->sadb_address_prefixlen = sel->prefixlen_s;
3417 pfkey_sockaddr_fill(&sel->saddr, 0,
3418 (struct sockaddr *)(addr + 1),
3421 case SADB_EXT_ADDRESS_DST:
3422 addr->sadb_address_prefixlen = sel->prefixlen_d;
3423 pfkey_sockaddr_fill(&sel->daddr, 0,
3424 (struct sockaddr *)(addr + 1),
3435 static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
3437 struct sadb_x_kmaddress *kma;
3439 int family = k->family;
3440 int socklen = pfkey_sockaddr_len(family);
3443 size_req = (sizeof(struct sadb_x_kmaddress) +
3444 pfkey_sockaddr_pair_size(family));
3446 kma = skb_put_zero(skb, size_req);
3447 kma->sadb_x_kmaddress_len = size_req / 8;
3448 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3449 kma->sadb_x_kmaddress_reserved = k->reserved;
3451 sa = (u8 *)(kma + 1);
3452 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3453 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3459 static int set_ipsecrequest(struct sk_buff *skb,
3460 uint8_t proto, uint8_t mode, int level,
3461 uint32_t reqid, uint8_t family,
3462 const xfrm_address_t *src, const xfrm_address_t *dst)
3464 struct sadb_x_ipsecrequest *rq;
3466 int socklen = pfkey_sockaddr_len(family);
3469 size_req = sizeof(struct sadb_x_ipsecrequest) +
3470 pfkey_sockaddr_pair_size(family);
3472 rq = skb_put_zero(skb, size_req);
3473 rq->sadb_x_ipsecrequest_len = size_req;
3474 rq->sadb_x_ipsecrequest_proto = proto;
3475 rq->sadb_x_ipsecrequest_mode = mode;
3476 rq->sadb_x_ipsecrequest_level = level;
3477 rq->sadb_x_ipsecrequest_reqid = reqid;
3479 sa = (u8 *) (rq + 1);
3480 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3481 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3488 #ifdef CONFIG_NET_KEY_MIGRATE
3489 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3490 const struct xfrm_migrate *m, int num_bundles,
3491 const struct xfrm_kmaddress *k)
3497 struct sk_buff *skb;
3498 struct sadb_msg *hdr;
3499 struct sadb_x_policy *pol;
3500 const struct xfrm_migrate *mp;
3502 if (type != XFRM_POLICY_TYPE_MAIN)
3505 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3509 /* addresses for KM */
3510 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3511 pfkey_sockaddr_pair_size(k->family));
3515 sasize_sel = pfkey_sockaddr_size(sel->family);
3518 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3521 size_pol += sizeof(struct sadb_x_policy);
3524 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3525 /* old locator pair */
3526 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3527 pfkey_sockaddr_pair_size(mp->old_family);
3528 /* new locator pair */
3529 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3530 pfkey_sockaddr_pair_size(mp->new_family);
3533 size += sizeof(struct sadb_msg) + size_pol;
3536 skb = alloc_skb(size, GFP_ATOMIC);
3540 hdr = skb_put(skb, sizeof(struct sadb_msg));
3541 hdr->sadb_msg_version = PF_KEY_V2;
3542 hdr->sadb_msg_type = SADB_X_MIGRATE;
3543 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3544 hdr->sadb_msg_len = size / 8;
3545 hdr->sadb_msg_errno = 0;
3546 hdr->sadb_msg_reserved = 0;
3547 hdr->sadb_msg_seq = 0;
3548 hdr->sadb_msg_pid = 0;
3550 /* Addresses to be used by KM for negotiation, if ext is available */
3551 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3555 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3558 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3560 /* policy information */
3561 pol = skb_put(skb, sizeof(struct sadb_x_policy));
3562 pol->sadb_x_policy_len = size_pol / 8;
3563 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3564 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3565 pol->sadb_x_policy_dir = dir + 1;
3566 pol->sadb_x_policy_reserved = 0;
3567 pol->sadb_x_policy_id = 0;
3568 pol->sadb_x_policy_priority = 0;
3570 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3571 /* old ipsecrequest */
3572 int mode = pfkey_mode_from_xfrm(mp->mode);
3575 if (set_ipsecrequest(skb, mp->proto, mode,
3576 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3577 mp->reqid, mp->old_family,
3578 &mp->old_saddr, &mp->old_daddr) < 0)
3581 /* new ipsecrequest */
3582 if (set_ipsecrequest(skb, mp->proto, mode,
3583 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3584 mp->reqid, mp->new_family,
3585 &mp->new_saddr, &mp->new_daddr) < 0)
3589 /* broadcast migrate message to sockets */
3590 pfkey_broadcast(skb, BROADCAST_ALL, NULL, &init_net);
3599 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3600 const struct xfrm_migrate *m, int num_bundles,
3601 const struct xfrm_kmaddress *k)
3603 return -ENOPROTOOPT;
3607 static int pfkey_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
3609 struct sock *sk = sock->sk;
3610 struct sk_buff *skb = NULL;
3611 struct sadb_msg *hdr = NULL;
3613 struct net *net = sock_net(sk);
3616 if (msg->msg_flags & MSG_OOB)
3620 if ((unsigned int)len > sk->sk_sndbuf - 32)
3624 skb = alloc_skb(len, GFP_KERNEL);
3629 if (memcpy_from_msg(skb_put(skb,len), msg, len))
3632 hdr = pfkey_get_base_msg(skb, &err);
3636 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
3637 err = pfkey_process(sk, skb, hdr);
3638 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
3641 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3648 static int pfkey_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
3651 struct sock *sk = sock->sk;
3652 struct pfkey_sock *pfk = pfkey_sk(sk);
3653 struct sk_buff *skb;
3657 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3660 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3666 msg->msg_flags |= MSG_TRUNC;
3670 skb_reset_transport_header(skb);
3671 err = skb_copy_datagram_msg(skb, 0, msg, copied);
3675 sock_recv_ts_and_drops(msg, sk, skb);
3677 err = (flags & MSG_TRUNC) ? skb->len : copied;
3679 if (pfk->dump.dump != NULL &&
3680 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
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 const struct net_proto_family pfkey_family_ops = {
3715 .create = pfkey_create,
3716 .owner = THIS_MODULE,
3719 #ifdef CONFIG_PROC_FS
3720 static int pfkey_seq_show(struct seq_file *f, void *v)
3722 struct sock *s = sk_entry(v);
3724 if (v == SEQ_START_TOKEN)
3725 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3727 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
3729 atomic_read(&s->sk_refcnt),
3730 sk_rmem_alloc_get(s),
3731 sk_wmem_alloc_get(s),
3732 from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
3738 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3741 struct net *net = seq_file_net(f);
3742 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3745 return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
3748 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3750 struct net *net = seq_file_net(f);
3751 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3753 return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
3756 static void pfkey_seq_stop(struct seq_file *f, void *v)
3762 static const struct seq_operations pfkey_seq_ops = {
3763 .start = pfkey_seq_start,
3764 .next = pfkey_seq_next,
3765 .stop = pfkey_seq_stop,
3766 .show = pfkey_seq_show,
3769 static int pfkey_seq_open(struct inode *inode, struct file *file)
3771 return seq_open_net(inode, file, &pfkey_seq_ops,
3772 sizeof(struct seq_net_private));
3775 static const struct file_operations pfkey_proc_ops = {
3776 .open = pfkey_seq_open,
3778 .llseek = seq_lseek,
3779 .release = seq_release_net,
3782 static int __net_init pfkey_init_proc(struct net *net)
3784 struct proc_dir_entry *e;
3786 e = proc_create("pfkey", 0, net->proc_net, &pfkey_proc_ops);
3793 static void __net_exit pfkey_exit_proc(struct net *net)
3795 remove_proc_entry("pfkey", net->proc_net);
3798 static inline int pfkey_init_proc(struct net *net)
3803 static inline void pfkey_exit_proc(struct net *net)
3808 static struct xfrm_mgr pfkeyv2_mgr =
3810 .notify = pfkey_send_notify,
3811 .acquire = pfkey_send_acquire,
3812 .compile_policy = pfkey_compile_policy,
3813 .new_mapping = pfkey_send_new_mapping,
3814 .notify_policy = pfkey_send_policy_notify,
3815 .migrate = pfkey_send_migrate,
3816 .is_alive = pfkey_is_alive,
3819 static int __net_init pfkey_net_init(struct net *net)
3821 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3824 INIT_HLIST_HEAD(&net_pfkey->table);
3825 atomic_set(&net_pfkey->socks_nr, 0);
3827 rv = pfkey_init_proc(net);
3832 static void __net_exit pfkey_net_exit(struct net *net)
3834 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3836 pfkey_exit_proc(net);
3837 BUG_ON(!hlist_empty(&net_pfkey->table));
3840 static struct pernet_operations pfkey_net_ops = {
3841 .init = pfkey_net_init,
3842 .exit = pfkey_net_exit,
3843 .id = &pfkey_net_id,
3844 .size = sizeof(struct netns_pfkey),
3847 static void __exit ipsec_pfkey_exit(void)
3849 xfrm_unregister_km(&pfkeyv2_mgr);
3850 sock_unregister(PF_KEY);
3851 unregister_pernet_subsys(&pfkey_net_ops);
3852 proto_unregister(&key_proto);
3855 static int __init ipsec_pfkey_init(void)
3857 int err = proto_register(&key_proto, 0);
3862 err = register_pernet_subsys(&pfkey_net_ops);
3864 goto out_unregister_key_proto;
3865 err = sock_register(&pfkey_family_ops);
3867 goto out_unregister_pernet;
3868 err = xfrm_register_km(&pfkeyv2_mgr);
3870 goto out_sock_unregister;
3874 out_sock_unregister:
3875 sock_unregister(PF_KEY);
3876 out_unregister_pernet:
3877 unregister_pernet_subsys(&pfkey_net_ops);
3878 out_unregister_key_proto:
3879 proto_unregister(&key_proto);
3883 module_init(ipsec_pfkey_init);
3884 module_exit(ipsec_pfkey_exit);
3885 MODULE_LICENSE("GPL");
3886 MODULE_ALIAS_NETPROTO(PF_KEY);