1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * net/key/af_key.c An implementation of PF_KEYv2 sockets.
5 * Authors: Maxim Giryaev <gem@asplinux.ru>
6 * David S. Miller <davem@redhat.com>
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
10 * Derek Atkins <derek@ihtfp.com>
13 #include <linux/capability.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/socket.h>
17 #include <linux/pfkeyv2.h>
18 #include <linux/ipsec.h>
19 #include <linux/skbuff.h>
20 #include <linux/rtnetlink.h>
22 #include <linux/in6.h>
23 #include <linux/proc_fs.h>
24 #include <linux/init.h>
25 #include <linux/slab.h>
26 #include <net/net_namespace.h>
27 #include <net/netns/generic.h>
32 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
33 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
35 static unsigned int pfkey_net_id __read_mostly;
37 /* List of all pfkey sockets. */
38 struct hlist_head table;
41 static DEFINE_MUTEX(pfkey_mutex);
44 static const struct xfrm_mark dummy_mark = {0, 0};
46 /* struct sock must be the first member of struct pfkey_sock */
54 int (*dump)(struct pfkey_sock *sk);
55 void (*done)(struct pfkey_sock *sk);
57 struct xfrm_policy_walk policy;
58 struct xfrm_state_walk state;
62 struct mutex dump_lock;
65 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
66 xfrm_address_t *saddr, xfrm_address_t *daddr,
69 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
71 return (struct pfkey_sock *)sk;
74 static int pfkey_can_dump(const struct sock *sk)
76 if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
81 static void pfkey_terminate_dump(struct pfkey_sock *pfk)
85 kfree_skb(pfk->dump.skb);
89 pfk->dump.dump = NULL;
90 pfk->dump.done = NULL;
94 static void pfkey_sock_destruct(struct sock *sk)
96 struct net *net = sock_net(sk);
97 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
99 pfkey_terminate_dump(pfkey_sk(sk));
100 skb_queue_purge(&sk->sk_receive_queue);
102 if (!sock_flag(sk, SOCK_DEAD)) {
103 pr_err("Attempt to release alive pfkey socket: %p\n", sk);
107 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
108 WARN_ON(refcount_read(&sk->sk_wmem_alloc));
110 atomic_dec(&net_pfkey->socks_nr);
113 static const struct proto_ops pfkey_ops;
115 static void pfkey_insert(struct sock *sk)
117 struct net *net = sock_net(sk);
118 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
120 mutex_lock(&pfkey_mutex);
121 sk_add_node_rcu(sk, &net_pfkey->table);
122 mutex_unlock(&pfkey_mutex);
125 static void pfkey_remove(struct sock *sk)
127 mutex_lock(&pfkey_mutex);
128 sk_del_node_init_rcu(sk);
129 mutex_unlock(&pfkey_mutex);
132 static struct proto key_proto = {
134 .owner = THIS_MODULE,
135 .obj_size = sizeof(struct pfkey_sock),
138 static int pfkey_create(struct net *net, struct socket *sock, int protocol,
141 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
143 struct pfkey_sock *pfk;
146 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
148 if (sock->type != SOCK_RAW)
149 return -ESOCKTNOSUPPORT;
150 if (protocol != PF_KEY_V2)
151 return -EPROTONOSUPPORT;
154 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto, kern);
159 mutex_init(&pfk->dump_lock);
161 sock->ops = &pfkey_ops;
162 sock_init_data(sock, sk);
164 sk->sk_family = PF_KEY;
165 sk->sk_destruct = pfkey_sock_destruct;
167 atomic_inc(&net_pfkey->socks_nr);
176 static int pfkey_release(struct socket *sock)
178 struct sock *sk = sock->sk;
187 skb_queue_purge(&sk->sk_write_queue);
195 static int pfkey_broadcast_one(struct sk_buff *skb, gfp_t allocation,
200 if (atomic_read(&sk->sk_rmem_alloc) > sk->sk_rcvbuf)
203 skb = skb_clone(skb, allocation);
206 skb_set_owner_r(skb, sk);
207 skb_queue_tail(&sk->sk_receive_queue, skb);
208 sk->sk_data_ready(sk);
214 /* Send SKB to all pfkey sockets matching selected criteria. */
215 #define BROADCAST_ALL 0
216 #define BROADCAST_ONE 1
217 #define BROADCAST_REGISTERED 2
218 #define BROADCAST_PROMISC_ONLY 4
219 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
220 int broadcast_flags, struct sock *one_sk,
223 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
227 /* XXX Do we need something like netlink_overrun? I think
228 * XXX PF_KEY socket apps will not mind current behavior.
234 sk_for_each_rcu(sk, &net_pfkey->table) {
235 struct pfkey_sock *pfk = pfkey_sk(sk);
238 /* Yes, it means that if you are meant to receive this
239 * pfkey message you receive it twice as promiscuous
243 pfkey_broadcast_one(skb, GFP_ATOMIC, sk);
245 /* the exact target will be processed later */
248 if (broadcast_flags != BROADCAST_ALL) {
249 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
251 if ((broadcast_flags & BROADCAST_REGISTERED) &&
254 if (broadcast_flags & BROADCAST_ONE)
258 err2 = pfkey_broadcast_one(skb, GFP_ATOMIC, sk);
260 /* Error is cleared after successful sending to at least one
262 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
268 err = pfkey_broadcast_one(skb, allocation, one_sk);
274 static int pfkey_do_dump(struct pfkey_sock *pfk)
276 struct sadb_msg *hdr;
279 mutex_lock(&pfk->dump_lock);
280 if (!pfk->dump.dump) {
285 rc = pfk->dump.dump(pfk);
286 if (rc == -ENOBUFS) {
292 if (!pfkey_can_dump(&pfk->sk)) {
297 hdr = (struct sadb_msg *) pfk->dump.skb->data;
298 hdr->sadb_msg_seq = 0;
299 hdr->sadb_msg_errno = rc;
300 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
301 &pfk->sk, sock_net(&pfk->sk));
302 pfk->dump.skb = NULL;
305 pfkey_terminate_dump(pfk);
308 mutex_unlock(&pfk->dump_lock);
312 static inline void pfkey_hdr_dup(struct sadb_msg *new,
313 const struct sadb_msg *orig)
318 static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk)
320 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
321 struct sadb_msg *hdr;
326 /* Woe be to the platform trying to support PFKEY yet
327 * having normal errnos outside the 1-255 range, inclusive.
330 if (err == ERESTARTSYS ||
331 err == ERESTARTNOHAND ||
332 err == ERESTARTNOINTR)
336 BUG_ON(err <= 0 || err >= 256);
338 hdr = skb_put(skb, sizeof(struct sadb_msg));
339 pfkey_hdr_dup(hdr, orig);
340 hdr->sadb_msg_errno = (uint8_t) err;
341 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
344 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk));
349 static const u8 sadb_ext_min_len[] = {
350 [SADB_EXT_RESERVED] = (u8) 0,
351 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
352 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
353 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
354 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
355 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
356 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
357 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
358 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
359 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
360 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
361 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
362 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
363 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
364 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
365 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
366 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
367 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
368 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
369 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
370 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
371 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
372 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
373 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
374 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
375 [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress),
376 [SADB_X_EXT_FILTER] = (u8) sizeof(struct sadb_x_filter),
379 /* Verify sadb_address_{len,prefixlen} against sa_family. */
380 static int verify_address_len(const void *p)
382 const struct sadb_address *sp = p;
383 const struct sockaddr *addr = (const struct sockaddr *)(sp + 1);
384 const struct sockaddr_in *sin;
385 #if IS_ENABLED(CONFIG_IPV6)
386 const struct sockaddr_in6 *sin6;
390 if (sp->sadb_address_len <
391 DIV_ROUND_UP(sizeof(*sp) + offsetofend(typeof(*addr), sa_family),
395 switch (addr->sa_family) {
397 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
398 if (sp->sadb_address_len != len ||
399 sp->sadb_address_prefixlen > 32)
402 #if IS_ENABLED(CONFIG_IPV6)
404 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
405 if (sp->sadb_address_len != len ||
406 sp->sadb_address_prefixlen > 128)
411 /* It is user using kernel to keep track of security
412 * associations for another protocol, such as
413 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
416 * XXX Actually, association/policy database is not yet
417 * XXX able to cope with arbitrary sockaddr families.
418 * XXX When it can, remove this -EINVAL. -DaveM
426 static inline int sadb_key_len(const struct sadb_key *key)
428 int key_bytes = DIV_ROUND_UP(key->sadb_key_bits, 8);
430 return DIV_ROUND_UP(sizeof(struct sadb_key) + key_bytes,
434 static int verify_key_len(const void *p)
436 const struct sadb_key *key = p;
438 if (sadb_key_len(key) > key->sadb_key_len)
444 static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx)
446 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
447 sec_ctx->sadb_x_ctx_len,
451 static inline int verify_sec_ctx_len(const void *p)
453 const struct sadb_x_sec_ctx *sec_ctx = p;
454 int len = sec_ctx->sadb_x_ctx_len;
459 len = pfkey_sec_ctx_len(sec_ctx);
461 if (sec_ctx->sadb_x_sec_len != len)
467 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx,
470 struct xfrm_user_sec_ctx *uctx = NULL;
471 int ctx_size = sec_ctx->sadb_x_ctx_len;
473 uctx = kmalloc((sizeof(*uctx)+ctx_size), gfp);
478 uctx->len = pfkey_sec_ctx_len(sec_ctx);
479 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
480 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
481 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
482 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
483 memcpy(uctx + 1, sec_ctx + 1,
489 static int present_and_same_family(const struct sadb_address *src,
490 const struct sadb_address *dst)
492 const struct sockaddr *s_addr, *d_addr;
497 s_addr = (const struct sockaddr *)(src + 1);
498 d_addr = (const struct sockaddr *)(dst + 1);
499 if (s_addr->sa_family != d_addr->sa_family)
501 if (s_addr->sa_family != AF_INET
502 #if IS_ENABLED(CONFIG_IPV6)
503 && s_addr->sa_family != AF_INET6
511 static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs)
513 const char *p = (char *) hdr;
519 const struct sadb_ext *ehdr = (const struct sadb_ext *) p;
523 if (len < sizeof(*ehdr))
526 ext_len = ehdr->sadb_ext_len;
527 ext_len *= sizeof(uint64_t);
528 ext_type = ehdr->sadb_ext_type;
529 if (ext_len < sizeof(uint64_t) ||
531 ext_type == SADB_EXT_RESERVED)
534 if (ext_type <= SADB_EXT_MAX) {
535 int min = (int) sadb_ext_min_len[ext_type];
538 if (ext_hdrs[ext_type-1] != NULL)
541 case SADB_EXT_ADDRESS_SRC:
542 case SADB_EXT_ADDRESS_DST:
543 case SADB_EXT_ADDRESS_PROXY:
544 case SADB_X_EXT_NAT_T_OA:
545 if (verify_address_len(p))
548 case SADB_X_EXT_SEC_CTX:
549 if (verify_sec_ctx_len(p))
552 case SADB_EXT_KEY_AUTH:
553 case SADB_EXT_KEY_ENCRYPT:
554 if (verify_key_len(p))
560 ext_hdrs[ext_type-1] = (void *) p;
570 pfkey_satype2proto(uint8_t satype)
573 case SADB_SATYPE_UNSPEC:
574 return IPSEC_PROTO_ANY;
577 case SADB_SATYPE_ESP:
579 case SADB_X_SATYPE_IPCOMP:
588 pfkey_proto2satype(uint16_t proto)
592 return SADB_SATYPE_AH;
594 return SADB_SATYPE_ESP;
596 return SADB_X_SATYPE_IPCOMP;
603 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
604 * say specifically 'just raw sockets' as we encode them as 255.
607 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
609 return proto == IPSEC_PROTO_ANY ? 0 : proto;
612 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
614 return proto ? proto : IPSEC_PROTO_ANY;
617 static inline int pfkey_sockaddr_len(sa_family_t family)
621 return sizeof(struct sockaddr_in);
622 #if IS_ENABLED(CONFIG_IPV6)
624 return sizeof(struct sockaddr_in6);
631 int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
633 switch (sa->sa_family) {
636 ((struct sockaddr_in *)sa)->sin_addr.s_addr;
638 #if IS_ENABLED(CONFIG_IPV6)
641 &((struct sockaddr_in6 *)sa)->sin6_addr,
642 sizeof(struct in6_addr));
650 int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr)
652 return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
656 static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs)
658 const struct sadb_sa *sa;
659 const struct sadb_address *addr;
661 unsigned short family;
662 xfrm_address_t *xaddr;
664 sa = ext_hdrs[SADB_EXT_SA - 1];
668 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
672 /* sadb_address_len should be checked by caller */
673 addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
677 family = ((const struct sockaddr *)(addr + 1))->sa_family;
680 xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr;
682 #if IS_ENABLED(CONFIG_IPV6)
684 xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr;
694 return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family);
697 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
700 pfkey_sockaddr_size(sa_family_t family)
702 return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
705 static inline int pfkey_mode_from_xfrm(int mode)
708 case XFRM_MODE_TRANSPORT:
709 return IPSEC_MODE_TRANSPORT;
710 case XFRM_MODE_TUNNEL:
711 return IPSEC_MODE_TUNNEL;
713 return IPSEC_MODE_BEET;
719 static inline int pfkey_mode_to_xfrm(int mode)
722 case IPSEC_MODE_ANY: /*XXX*/
723 case IPSEC_MODE_TRANSPORT:
724 return XFRM_MODE_TRANSPORT;
725 case IPSEC_MODE_TUNNEL:
726 return XFRM_MODE_TUNNEL;
727 case IPSEC_MODE_BEET:
728 return XFRM_MODE_BEET;
734 static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port,
736 unsigned short family)
741 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
742 sin->sin_family = AF_INET;
743 sin->sin_port = port;
744 sin->sin_addr.s_addr = xaddr->a4;
745 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
748 #if IS_ENABLED(CONFIG_IPV6)
751 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
752 sin6->sin6_family = AF_INET6;
753 sin6->sin6_port = port;
754 sin6->sin6_flowinfo = 0;
755 sin6->sin6_addr = xaddr->in6;
756 sin6->sin6_scope_id = 0;
764 static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x,
765 int add_keys, int hsc)
768 struct sadb_msg *hdr;
770 struct sadb_lifetime *lifetime;
771 struct sadb_address *addr;
772 struct sadb_key *key;
773 struct sadb_x_sa2 *sa2;
774 struct sadb_x_sec_ctx *sec_ctx;
775 struct xfrm_sec_ctx *xfrm_ctx;
778 int auth_key_size = 0;
779 int encrypt_key_size = 0;
781 struct xfrm_encap_tmpl *natt = NULL;
784 /* address family check */
785 sockaddr_size = pfkey_sockaddr_size(x->props.family);
787 return ERR_PTR(-EINVAL);
789 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
790 key(AE), (identity(SD),) (sensitivity)> */
791 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
792 sizeof(struct sadb_lifetime) +
793 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
794 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
795 sizeof(struct sadb_address)*2 +
797 sizeof(struct sadb_x_sa2);
799 if ((xfrm_ctx = x->security)) {
800 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
801 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
804 /* identity & sensitivity */
805 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family))
806 size += sizeof(struct sadb_address) + sockaddr_size;
809 if (x->aalg && x->aalg->alg_key_len) {
811 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
812 size += sizeof(struct sadb_key) + auth_key_size;
814 if (x->ealg && x->ealg->alg_key_len) {
816 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
817 size += sizeof(struct sadb_key) + encrypt_key_size;
823 if (natt && natt->encap_type) {
824 size += sizeof(struct sadb_x_nat_t_type);
825 size += sizeof(struct sadb_x_nat_t_port);
826 size += sizeof(struct sadb_x_nat_t_port);
829 skb = alloc_skb(size + 16, GFP_ATOMIC);
831 return ERR_PTR(-ENOBUFS);
833 /* call should fill header later */
834 hdr = skb_put(skb, sizeof(struct sadb_msg));
835 memset(hdr, 0, size); /* XXX do we need this ? */
836 hdr->sadb_msg_len = size / sizeof(uint64_t);
839 sa = skb_put(skb, sizeof(struct sadb_sa));
840 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
841 sa->sadb_sa_exttype = SADB_EXT_SA;
842 sa->sadb_sa_spi = x->id.spi;
843 sa->sadb_sa_replay = x->props.replay_window;
844 switch (x->km.state) {
845 case XFRM_STATE_VALID:
846 sa->sadb_sa_state = x->km.dying ?
847 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
850 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
853 sa->sadb_sa_state = SADB_SASTATE_DEAD;
856 sa->sadb_sa_auth = 0;
858 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
859 sa->sadb_sa_auth = (a && a->pfkey_supported) ?
860 a->desc.sadb_alg_id : 0;
862 sa->sadb_sa_encrypt = 0;
863 BUG_ON(x->ealg && x->calg);
865 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
866 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
867 a->desc.sadb_alg_id : 0;
869 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
871 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
872 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
873 a->desc.sadb_alg_id : 0;
876 sa->sadb_sa_flags = 0;
877 if (x->props.flags & XFRM_STATE_NOECN)
878 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
879 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
880 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
881 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
882 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
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_HARD;
890 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
891 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
892 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
893 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
897 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
898 lifetime->sadb_lifetime_len =
899 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
900 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
901 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
902 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
903 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
904 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
907 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
908 lifetime->sadb_lifetime_len =
909 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
910 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
911 lifetime->sadb_lifetime_allocations = x->curlft.packets;
912 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
913 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
914 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
916 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
917 addr->sadb_address_len =
918 (sizeof(struct sadb_address)+sockaddr_size)/
920 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
921 /* "if the ports are non-zero, then the sadb_address_proto field,
922 normally zero, MUST be filled in with the transport
923 protocol's number." - RFC2367 */
924 addr->sadb_address_proto = 0;
925 addr->sadb_address_reserved = 0;
927 addr->sadb_address_prefixlen =
928 pfkey_sockaddr_fill(&x->props.saddr, 0,
929 (struct sockaddr *) (addr + 1),
931 BUG_ON(!addr->sadb_address_prefixlen);
934 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
935 addr->sadb_address_len =
936 (sizeof(struct sadb_address)+sockaddr_size)/
938 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
939 addr->sadb_address_proto = 0;
940 addr->sadb_address_reserved = 0;
942 addr->sadb_address_prefixlen =
943 pfkey_sockaddr_fill(&x->id.daddr, 0,
944 (struct sockaddr *) (addr + 1),
946 BUG_ON(!addr->sadb_address_prefixlen);
948 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr,
951 sizeof(struct sadb_address) + sockaddr_size);
952 addr->sadb_address_len =
953 (sizeof(struct sadb_address)+sockaddr_size)/
955 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
956 addr->sadb_address_proto =
957 pfkey_proto_from_xfrm(x->sel.proto);
958 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
959 addr->sadb_address_reserved = 0;
961 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
962 (struct sockaddr *) (addr + 1),
967 if (add_keys && auth_key_size) {
968 key = skb_put(skb, sizeof(struct sadb_key) + auth_key_size);
969 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
971 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
972 key->sadb_key_bits = x->aalg->alg_key_len;
973 key->sadb_key_reserved = 0;
974 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
977 if (add_keys && encrypt_key_size) {
978 key = skb_put(skb, sizeof(struct sadb_key) + encrypt_key_size);
979 key->sadb_key_len = (sizeof(struct sadb_key) +
980 encrypt_key_size) / sizeof(uint64_t);
981 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
982 key->sadb_key_bits = x->ealg->alg_key_len;
983 key->sadb_key_reserved = 0;
984 memcpy(key + 1, x->ealg->alg_key,
985 (x->ealg->alg_key_len+7)/8);
989 sa2 = skb_put(skb, sizeof(struct sadb_x_sa2));
990 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
991 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
992 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
994 return ERR_PTR(-EINVAL);
996 sa2->sadb_x_sa2_mode = mode;
997 sa2->sadb_x_sa2_reserved1 = 0;
998 sa2->sadb_x_sa2_reserved2 = 0;
999 sa2->sadb_x_sa2_sequence = 0;
1000 sa2->sadb_x_sa2_reqid = x->props.reqid;
1002 if (natt && natt->encap_type) {
1003 struct sadb_x_nat_t_type *n_type;
1004 struct sadb_x_nat_t_port *n_port;
1007 n_type = skb_put(skb, sizeof(*n_type));
1008 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
1009 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
1010 n_type->sadb_x_nat_t_type_type = natt->encap_type;
1011 n_type->sadb_x_nat_t_type_reserved[0] = 0;
1012 n_type->sadb_x_nat_t_type_reserved[1] = 0;
1013 n_type->sadb_x_nat_t_type_reserved[2] = 0;
1016 n_port = skb_put(skb, sizeof(*n_port));
1017 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1018 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
1019 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
1020 n_port->sadb_x_nat_t_port_reserved = 0;
1023 n_port = skb_put(skb, sizeof(*n_port));
1024 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1025 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
1026 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
1027 n_port->sadb_x_nat_t_port_reserved = 0;
1030 /* security context */
1032 sec_ctx = skb_put(skb,
1033 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1034 sec_ctx->sadb_x_sec_len =
1035 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1036 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1037 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1038 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1039 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1040 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1048 static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x)
1050 struct sk_buff *skb;
1052 skb = __pfkey_xfrm_state2msg(x, 1, 3);
1057 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x,
1060 return __pfkey_xfrm_state2msg(x, 0, hsc);
1063 static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
1064 const struct sadb_msg *hdr,
1065 void * const *ext_hdrs)
1067 struct xfrm_state *x;
1068 const struct sadb_lifetime *lifetime;
1069 const struct sadb_sa *sa;
1070 const struct sadb_key *key;
1071 const struct sadb_x_sec_ctx *sec_ctx;
1076 sa = ext_hdrs[SADB_EXT_SA - 1];
1078 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1079 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1080 return ERR_PTR(-EINVAL);
1081 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1082 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1083 return ERR_PTR(-EINVAL);
1084 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1085 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1086 return ERR_PTR(-EINVAL);
1087 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1088 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1089 return ERR_PTR(-EINVAL);
1091 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1093 return ERR_PTR(-EINVAL);
1095 /* default error is no buffer space */
1100 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1101 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1102 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1103 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1104 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1107 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1108 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1110 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1111 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1112 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1113 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1114 return ERR_PTR(-EINVAL);
1115 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1117 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1118 key->sadb_key_bits == 0)
1119 return ERR_PTR(-EINVAL);
1120 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1122 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1123 key->sadb_key_bits == 0)
1124 return ERR_PTR(-EINVAL);
1126 x = xfrm_state_alloc(net);
1128 return ERR_PTR(-ENOBUFS);
1130 x->id.proto = proto;
1131 x->id.spi = sa->sadb_sa_spi;
1132 x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay,
1133 (sizeof(x->replay.bitmap) * 8));
1134 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1135 x->props.flags |= XFRM_STATE_NOECN;
1136 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1137 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1138 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1139 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1141 lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1];
1142 if (lifetime != NULL) {
1143 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1144 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1145 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1146 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1148 lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1];
1149 if (lifetime != NULL) {
1150 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1151 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1152 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1153 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1156 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
1157 if (sec_ctx != NULL) {
1158 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
1163 err = security_xfrm_state_alloc(x, uctx);
1171 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1172 if (sa->sadb_sa_auth) {
1174 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1175 if (!a || !a->pfkey_supported) {
1180 keysize = (key->sadb_key_bits + 7) / 8;
1181 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1186 strcpy(x->aalg->alg_name, a->name);
1187 x->aalg->alg_key_len = 0;
1189 x->aalg->alg_key_len = key->sadb_key_bits;
1190 memcpy(x->aalg->alg_key, key+1, keysize);
1192 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1193 x->props.aalgo = sa->sadb_sa_auth;
1194 /* x->algo.flags = sa->sadb_sa_flags; */
1196 if (sa->sadb_sa_encrypt) {
1197 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1198 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1199 if (!a || !a->pfkey_supported) {
1203 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1208 strcpy(x->calg->alg_name, a->name);
1209 x->props.calgo = sa->sadb_sa_encrypt;
1212 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1213 if (!a || !a->pfkey_supported) {
1217 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1219 keysize = (key->sadb_key_bits + 7) / 8;
1220 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1225 strcpy(x->ealg->alg_name, a->name);
1226 x->ealg->alg_key_len = 0;
1228 x->ealg->alg_key_len = key->sadb_key_bits;
1229 memcpy(x->ealg->alg_key, key+1, keysize);
1231 x->props.ealgo = sa->sadb_sa_encrypt;
1232 x->geniv = a->uinfo.encr.geniv;
1235 /* x->algo.flags = sa->sadb_sa_flags; */
1237 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1239 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1242 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1243 const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
1244 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1249 x->props.mode = mode;
1250 x->props.reqid = sa2->sadb_x_sa2_reqid;
1253 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1254 const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1256 /* Nobody uses this, but we try. */
1257 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1258 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1262 x->sel.family = x->props.family;
1264 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1265 const struct sadb_x_nat_t_type* n_type;
1266 struct xfrm_encap_tmpl *natt;
1268 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1275 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1276 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1278 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1279 const struct sadb_x_nat_t_port *n_port =
1280 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1281 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1283 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1284 const struct sadb_x_nat_t_port *n_port =
1285 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1286 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1288 memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
1291 err = xfrm_init_state(x);
1295 x->km.seq = hdr->sadb_msg_seq;
1299 x->km.state = XFRM_STATE_DEAD;
1301 return ERR_PTR(err);
1304 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1309 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1311 struct net *net = sock_net(sk);
1312 struct sk_buff *resp_skb;
1313 struct sadb_x_sa2 *sa2;
1314 struct sadb_address *saddr, *daddr;
1315 struct sadb_msg *out_hdr;
1316 struct sadb_spirange *range;
1317 struct xfrm_state *x = NULL;
1320 u32 min_spi, max_spi;
1323 unsigned short family;
1324 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1326 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1327 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1330 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1334 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1335 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1338 reqid = sa2->sadb_x_sa2_reqid;
1344 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1345 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1347 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1350 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1351 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1353 #if IS_ENABLED(CONFIG_IPV6)
1355 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1356 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1361 if (hdr->sadb_msg_seq) {
1362 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1363 if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) {
1370 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, 0, proto, xdaddr, xsaddr, 1, family);
1376 max_spi = 0x0fffffff;
1378 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1380 min_spi = range->sadb_spirange_min;
1381 max_spi = range->sadb_spirange_max;
1384 err = verify_spi_info(x->id.proto, min_spi, max_spi);
1390 err = xfrm_alloc_spi(x, min_spi, max_spi);
1391 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1393 if (IS_ERR(resp_skb)) {
1395 return PTR_ERR(resp_skb);
1398 out_hdr = (struct sadb_msg *) resp_skb->data;
1399 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1400 out_hdr->sadb_msg_type = SADB_GETSPI;
1401 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1402 out_hdr->sadb_msg_errno = 0;
1403 out_hdr->sadb_msg_reserved = 0;
1404 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1405 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1409 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
1414 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1416 struct net *net = sock_net(sk);
1417 struct xfrm_state *x;
1419 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1422 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1425 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1429 spin_lock_bh(&x->lock);
1430 if (x->km.state == XFRM_STATE_ACQ)
1431 x->km.state = XFRM_STATE_ERROR;
1433 spin_unlock_bh(&x->lock);
1438 static inline int event2poltype(int event)
1441 case XFRM_MSG_DELPOLICY:
1442 return SADB_X_SPDDELETE;
1443 case XFRM_MSG_NEWPOLICY:
1444 return SADB_X_SPDADD;
1445 case XFRM_MSG_UPDPOLICY:
1446 return SADB_X_SPDUPDATE;
1447 case XFRM_MSG_POLEXPIRE:
1448 // return SADB_X_SPDEXPIRE;
1450 pr_err("pfkey: Unknown policy event %d\n", event);
1457 static inline int event2keytype(int event)
1460 case XFRM_MSG_DELSA:
1462 case XFRM_MSG_NEWSA:
1464 case XFRM_MSG_UPDSA:
1466 case XFRM_MSG_EXPIRE:
1469 pr_err("pfkey: Unknown SA event %d\n", event);
1477 static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
1479 struct sk_buff *skb;
1480 struct sadb_msg *hdr;
1482 skb = pfkey_xfrm_state2msg(x);
1485 return PTR_ERR(skb);
1487 hdr = (struct sadb_msg *) skb->data;
1488 hdr->sadb_msg_version = PF_KEY_V2;
1489 hdr->sadb_msg_type = event2keytype(c->event);
1490 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1491 hdr->sadb_msg_errno = 0;
1492 hdr->sadb_msg_reserved = 0;
1493 hdr->sadb_msg_seq = c->seq;
1494 hdr->sadb_msg_pid = c->portid;
1496 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
1501 static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1503 struct net *net = sock_net(sk);
1504 struct xfrm_state *x;
1508 x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1513 if (hdr->sadb_msg_type == SADB_ADD)
1514 err = xfrm_state_add(x);
1516 err = xfrm_state_update(x);
1518 xfrm_audit_state_add(x, err ? 0 : 1, true);
1521 x->km.state = XFRM_STATE_DEAD;
1522 __xfrm_state_put(x);
1526 if (hdr->sadb_msg_type == SADB_ADD)
1527 c.event = XFRM_MSG_NEWSA;
1529 c.event = XFRM_MSG_UPDSA;
1530 c.seq = hdr->sadb_msg_seq;
1531 c.portid = hdr->sadb_msg_pid;
1532 km_state_notify(x, &c);
1538 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1540 struct net *net = sock_net(sk);
1541 struct xfrm_state *x;
1545 if (!ext_hdrs[SADB_EXT_SA-1] ||
1546 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1547 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1550 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1554 if ((err = security_xfrm_state_delete(x)))
1557 if (xfrm_state_kern(x)) {
1562 err = xfrm_state_delete(x);
1567 c.seq = hdr->sadb_msg_seq;
1568 c.portid = hdr->sadb_msg_pid;
1569 c.event = XFRM_MSG_DELSA;
1570 km_state_notify(x, &c);
1572 xfrm_audit_state_delete(x, err ? 0 : 1, true);
1578 static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1580 struct net *net = sock_net(sk);
1582 struct sk_buff *out_skb;
1583 struct sadb_msg *out_hdr;
1584 struct xfrm_state *x;
1586 if (!ext_hdrs[SADB_EXT_SA-1] ||
1587 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1588 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1591 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1595 out_skb = pfkey_xfrm_state2msg(x);
1596 proto = x->id.proto;
1598 if (IS_ERR(out_skb))
1599 return PTR_ERR(out_skb);
1601 out_hdr = (struct sadb_msg *) out_skb->data;
1602 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1603 out_hdr->sadb_msg_type = SADB_GET;
1604 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1605 out_hdr->sadb_msg_errno = 0;
1606 out_hdr->sadb_msg_reserved = 0;
1607 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1608 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1609 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1614 static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
1617 struct sk_buff *skb;
1618 struct sadb_msg *hdr;
1619 int len, auth_len, enc_len, i;
1621 auth_len = xfrm_count_pfkey_auth_supported();
1623 auth_len *= sizeof(struct sadb_alg);
1624 auth_len += sizeof(struct sadb_supported);
1627 enc_len = xfrm_count_pfkey_enc_supported();
1629 enc_len *= sizeof(struct sadb_alg);
1630 enc_len += sizeof(struct sadb_supported);
1633 len = enc_len + auth_len + sizeof(struct sadb_msg);
1635 skb = alloc_skb(len + 16, allocation);
1639 hdr = skb_put(skb, sizeof(*hdr));
1640 pfkey_hdr_dup(hdr, orig);
1641 hdr->sadb_msg_errno = 0;
1642 hdr->sadb_msg_len = len / sizeof(uint64_t);
1645 struct sadb_supported *sp;
1646 struct sadb_alg *ap;
1648 sp = skb_put(skb, auth_len);
1649 ap = (struct sadb_alg *) (sp + 1);
1651 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1652 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1654 for (i = 0; ; i++) {
1655 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1658 if (!aalg->pfkey_supported)
1660 if (aalg->available)
1666 struct sadb_supported *sp;
1667 struct sadb_alg *ap;
1669 sp = skb_put(skb, enc_len);
1670 ap = (struct sadb_alg *) (sp + 1);
1672 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1673 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1675 for (i = 0; ; i++) {
1676 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1679 if (!ealg->pfkey_supported)
1681 if (ealg->available)
1690 static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1692 struct pfkey_sock *pfk = pfkey_sk(sk);
1693 struct sk_buff *supp_skb;
1695 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1698 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1699 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1701 pfk->registered |= (1<<hdr->sadb_msg_satype);
1704 mutex_lock(&pfkey_mutex);
1707 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL | __GFP_ZERO);
1708 mutex_unlock(&pfkey_mutex);
1711 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1712 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1717 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk,
1722 static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
1724 struct sk_buff *skb;
1725 struct sadb_msg *hdr;
1727 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1731 hdr = skb_put_data(skb, ihdr, sizeof(struct sadb_msg));
1732 hdr->sadb_msg_errno = (uint8_t) 0;
1733 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1735 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk,
1739 static int key_notify_sa_flush(const struct km_event *c)
1741 struct sk_buff *skb;
1742 struct sadb_msg *hdr;
1744 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1747 hdr = skb_put(skb, sizeof(struct sadb_msg));
1748 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1749 hdr->sadb_msg_type = SADB_FLUSH;
1750 hdr->sadb_msg_seq = c->seq;
1751 hdr->sadb_msg_pid = c->portid;
1752 hdr->sadb_msg_version = PF_KEY_V2;
1753 hdr->sadb_msg_errno = (uint8_t) 0;
1754 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1755 hdr->sadb_msg_reserved = 0;
1757 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
1762 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1764 struct net *net = sock_net(sk);
1769 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1773 err = xfrm_state_flush(net, proto, true, false);
1774 err2 = unicast_flush_resp(sk, hdr);
1776 if (err == -ESRCH) /* empty table - go quietly */
1778 return err ? err : err2;
1781 c.data.proto = proto;
1782 c.seq = hdr->sadb_msg_seq;
1783 c.portid = hdr->sadb_msg_pid;
1784 c.event = XFRM_MSG_FLUSHSA;
1786 km_state_notify(NULL, &c);
1791 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1793 struct pfkey_sock *pfk = ptr;
1794 struct sk_buff *out_skb;
1795 struct sadb_msg *out_hdr;
1797 if (!pfkey_can_dump(&pfk->sk))
1800 out_skb = pfkey_xfrm_state2msg(x);
1801 if (IS_ERR(out_skb))
1802 return PTR_ERR(out_skb);
1804 out_hdr = (struct sadb_msg *) out_skb->data;
1805 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1806 out_hdr->sadb_msg_type = SADB_DUMP;
1807 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1808 out_hdr->sadb_msg_errno = 0;
1809 out_hdr->sadb_msg_reserved = 0;
1810 out_hdr->sadb_msg_seq = count + 1;
1811 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
1814 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
1815 &pfk->sk, sock_net(&pfk->sk));
1816 pfk->dump.skb = out_skb;
1821 static int pfkey_dump_sa(struct pfkey_sock *pfk)
1823 struct net *net = sock_net(&pfk->sk);
1824 return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1827 static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1829 struct net *net = sock_net(&pfk->sk);
1831 xfrm_state_walk_done(&pfk->dump.u.state, net);
1834 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1837 struct xfrm_address_filter *filter = NULL;
1838 struct pfkey_sock *pfk = pfkey_sk(sk);
1840 mutex_lock(&pfk->dump_lock);
1841 if (pfk->dump.dump != NULL) {
1842 mutex_unlock(&pfk->dump_lock);
1846 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1848 mutex_unlock(&pfk->dump_lock);
1852 if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
1853 struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
1855 if ((xfilter->sadb_x_filter_splen >=
1856 (sizeof(xfrm_address_t) << 3)) ||
1857 (xfilter->sadb_x_filter_dplen >=
1858 (sizeof(xfrm_address_t) << 3))) {
1859 mutex_unlock(&pfk->dump_lock);
1862 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
1863 if (filter == NULL) {
1864 mutex_unlock(&pfk->dump_lock);
1868 memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr,
1869 sizeof(xfrm_address_t));
1870 memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr,
1871 sizeof(xfrm_address_t));
1872 filter->family = xfilter->sadb_x_filter_family;
1873 filter->splen = xfilter->sadb_x_filter_splen;
1874 filter->dplen = xfilter->sadb_x_filter_dplen;
1877 pfk->dump.msg_version = hdr->sadb_msg_version;
1878 pfk->dump.msg_portid = hdr->sadb_msg_pid;
1879 pfk->dump.dump = pfkey_dump_sa;
1880 pfk->dump.done = pfkey_dump_sa_done;
1881 xfrm_state_walk_init(&pfk->dump.u.state, proto, filter);
1882 mutex_unlock(&pfk->dump_lock);
1884 return pfkey_do_dump(pfk);
1887 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1889 struct pfkey_sock *pfk = pfkey_sk(sk);
1890 int satype = hdr->sadb_msg_satype;
1891 bool reset_errno = false;
1893 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1895 if (satype != 0 && satype != 1)
1897 pfk->promisc = satype;
1899 if (reset_errno && skb_cloned(skb))
1900 skb = skb_copy(skb, GFP_KERNEL);
1902 skb = skb_clone(skb, GFP_KERNEL);
1904 if (reset_errno && skb) {
1905 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1906 new_hdr->sadb_msg_errno = 0;
1909 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
1913 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1916 u32 reqid = *(u32*)ptr;
1918 for (i=0; i<xp->xfrm_nr; i++) {
1919 if (xp->xfrm_vec[i].reqid == reqid)
1925 static u32 gen_reqid(struct net *net)
1927 struct xfrm_policy_walk walk;
1930 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1936 reqid = IPSEC_MANUAL_REQID_MAX+1;
1937 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1938 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1939 xfrm_policy_walk_done(&walk, net);
1942 } while (reqid != start);
1947 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1949 struct net *net = xp_net(xp);
1950 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1953 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1956 if (rq->sadb_x_ipsecrequest_mode == 0)
1958 if (!xfrm_id_proto_valid(rq->sadb_x_ipsecrequest_proto))
1961 t->id.proto = rq->sadb_x_ipsecrequest_proto;
1962 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1965 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1967 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1968 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1969 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1971 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1975 /* addresses present only in tunnel mode */
1976 if (t->mode == XFRM_MODE_TUNNEL) {
1979 err = parse_sockaddr_pair(
1980 (struct sockaddr *)(rq + 1),
1981 rq->sadb_x_ipsecrequest_len - sizeof(*rq),
1982 &t->saddr, &t->id.daddr, &t->encap_family);
1986 t->encap_family = xp->family;
1988 /* No way to set this via kame pfkey */
1995 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1998 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1999 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
2001 if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
2004 while (len >= sizeof(*rq)) {
2005 if (len < rq->sadb_x_ipsecrequest_len ||
2006 rq->sadb_x_ipsecrequest_len < sizeof(*rq))
2009 if ((err = parse_ipsecrequest(xp, rq)) < 0)
2011 len -= rq->sadb_x_ipsecrequest_len;
2012 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
2017 static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
2019 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
2022 int len = sizeof(struct sadb_x_sec_ctx);
2023 len += xfrm_ctx->ctx_len;
2024 return PFKEY_ALIGN8(len);
2029 static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
2031 const struct xfrm_tmpl *t;
2032 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2036 for (i=0; i<xp->xfrm_nr; i++) {
2037 t = xp->xfrm_vec + i;
2038 socklen += pfkey_sockaddr_len(t->encap_family);
2041 return sizeof(struct sadb_msg) +
2042 (sizeof(struct sadb_lifetime) * 3) +
2043 (sizeof(struct sadb_address) * 2) +
2044 (sockaddr_size * 2) +
2045 sizeof(struct sadb_x_policy) +
2046 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
2048 pfkey_xfrm_policy2sec_ctx_size(xp);
2051 static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
2053 struct sk_buff *skb;
2056 size = pfkey_xfrm_policy2msg_size(xp);
2058 skb = alloc_skb(size + 16, GFP_ATOMIC);
2060 return ERR_PTR(-ENOBUFS);
2065 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
2067 struct sadb_msg *hdr;
2068 struct sadb_address *addr;
2069 struct sadb_lifetime *lifetime;
2070 struct sadb_x_policy *pol;
2071 struct sadb_x_sec_ctx *sec_ctx;
2072 struct xfrm_sec_ctx *xfrm_ctx;
2075 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2076 int socklen = pfkey_sockaddr_len(xp->family);
2078 size = pfkey_xfrm_policy2msg_size(xp);
2080 /* call should fill header later */
2081 hdr = skb_put(skb, sizeof(struct sadb_msg));
2082 memset(hdr, 0, size); /* XXX do we need this ? */
2085 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
2086 addr->sadb_address_len =
2087 (sizeof(struct sadb_address)+sockaddr_size)/
2089 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2090 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2091 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2092 addr->sadb_address_reserved = 0;
2093 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2095 (struct sockaddr *) (addr + 1),
2100 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
2101 addr->sadb_address_len =
2102 (sizeof(struct sadb_address)+sockaddr_size)/
2104 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2105 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2106 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2107 addr->sadb_address_reserved = 0;
2109 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2110 (struct sockaddr *) (addr + 1),
2114 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2115 lifetime->sadb_lifetime_len =
2116 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2117 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2118 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2119 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2120 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2121 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2123 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2124 lifetime->sadb_lifetime_len =
2125 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2126 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2127 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2128 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2129 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2130 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2132 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2133 lifetime->sadb_lifetime_len =
2134 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2135 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2136 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2137 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2138 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2139 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2141 pol = skb_put(skb, sizeof(struct sadb_x_policy));
2142 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2143 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2144 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2145 if (xp->action == XFRM_POLICY_ALLOW) {
2147 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2149 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2151 pol->sadb_x_policy_dir = dir+1;
2152 pol->sadb_x_policy_reserved = 0;
2153 pol->sadb_x_policy_id = xp->index;
2154 pol->sadb_x_policy_priority = xp->priority;
2156 for (i=0; i<xp->xfrm_nr; i++) {
2157 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
2158 struct sadb_x_ipsecrequest *rq;
2162 req_size = sizeof(struct sadb_x_ipsecrequest);
2163 if (t->mode == XFRM_MODE_TUNNEL) {
2164 socklen = pfkey_sockaddr_len(t->encap_family);
2165 req_size += socklen * 2;
2169 rq = skb_put(skb, req_size);
2170 pol->sadb_x_policy_len += req_size/8;
2171 memset(rq, 0, sizeof(*rq));
2172 rq->sadb_x_ipsecrequest_len = req_size;
2173 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2174 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2176 rq->sadb_x_ipsecrequest_mode = mode;
2177 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2179 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2181 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2182 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2184 if (t->mode == XFRM_MODE_TUNNEL) {
2185 u8 *sa = (void *)(rq + 1);
2186 pfkey_sockaddr_fill(&t->saddr, 0,
2187 (struct sockaddr *)sa,
2189 pfkey_sockaddr_fill(&t->id.daddr, 0,
2190 (struct sockaddr *) (sa + socklen),
2195 /* security context */
2196 if ((xfrm_ctx = xp->security)) {
2197 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2199 sec_ctx = skb_put(skb, ctx_size);
2200 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2201 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2202 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2203 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2204 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2205 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2209 hdr->sadb_msg_len = size / sizeof(uint64_t);
2210 hdr->sadb_msg_reserved = refcount_read(&xp->refcnt);
2215 static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2217 struct sk_buff *out_skb;
2218 struct sadb_msg *out_hdr;
2221 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2222 if (IS_ERR(out_skb))
2223 return PTR_ERR(out_skb);
2225 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2231 out_hdr = (struct sadb_msg *) out_skb->data;
2232 out_hdr->sadb_msg_version = PF_KEY_V2;
2234 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2235 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2237 out_hdr->sadb_msg_type = event2poltype(c->event);
2238 out_hdr->sadb_msg_errno = 0;
2239 out_hdr->sadb_msg_seq = c->seq;
2240 out_hdr->sadb_msg_pid = c->portid;
2241 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
2246 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2248 struct net *net = sock_net(sk);
2250 struct sadb_lifetime *lifetime;
2251 struct sadb_address *sa;
2252 struct sadb_x_policy *pol;
2253 struct xfrm_policy *xp;
2255 struct sadb_x_sec_ctx *sec_ctx;
2257 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2258 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2259 !ext_hdrs[SADB_X_EXT_POLICY-1])
2262 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2263 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2265 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2268 xp = xfrm_policy_alloc(net, GFP_KERNEL);
2272 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2273 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2274 xp->priority = pol->sadb_x_policy_priority;
2276 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2277 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2278 xp->selector.family = xp->family;
2279 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2280 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2281 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2282 if (xp->selector.sport)
2283 xp->selector.sport_mask = htons(0xffff);
2285 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2286 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2287 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2289 /* Amusing, we set this twice. KAME apps appear to set same value
2290 * in both addresses.
2292 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2294 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2295 if (xp->selector.dport)
2296 xp->selector.dport_mask = htons(0xffff);
2298 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2299 if (sec_ctx != NULL) {
2300 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2307 err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL);
2314 xp->lft.soft_byte_limit = XFRM_INF;
2315 xp->lft.hard_byte_limit = XFRM_INF;
2316 xp->lft.soft_packet_limit = XFRM_INF;
2317 xp->lft.hard_packet_limit = XFRM_INF;
2318 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2319 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2320 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2321 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2322 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2324 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2325 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2326 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2327 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2328 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2331 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2332 (err = parse_ipsecrequests(xp, pol)) < 0)
2335 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2336 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2338 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
2343 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2344 c.event = XFRM_MSG_UPDPOLICY;
2346 c.event = XFRM_MSG_NEWPOLICY;
2348 c.seq = hdr->sadb_msg_seq;
2349 c.portid = hdr->sadb_msg_pid;
2351 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2357 xfrm_policy_destroy(xp);
2361 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2363 struct net *net = sock_net(sk);
2365 struct sadb_address *sa;
2366 struct sadb_x_policy *pol;
2367 struct xfrm_policy *xp;
2368 struct xfrm_selector sel;
2370 struct sadb_x_sec_ctx *sec_ctx;
2371 struct xfrm_sec_ctx *pol_ctx = NULL;
2373 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2374 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2375 !ext_hdrs[SADB_X_EXT_POLICY-1])
2378 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2379 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2382 memset(&sel, 0, sizeof(sel));
2384 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2385 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2386 sel.prefixlen_s = sa->sadb_address_prefixlen;
2387 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2388 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2390 sel.sport_mask = htons(0xffff);
2392 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2393 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2394 sel.prefixlen_d = sa->sadb_address_prefixlen;
2395 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2396 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2398 sel.dport_mask = htons(0xffff);
2400 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2401 if (sec_ctx != NULL) {
2402 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2407 err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL);
2413 xp = xfrm_policy_bysel_ctx(net, &dummy_mark, 0, XFRM_POLICY_TYPE_MAIN,
2414 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2416 security_xfrm_policy_free(pol_ctx);
2420 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2425 c.seq = hdr->sadb_msg_seq;
2426 c.portid = hdr->sadb_msg_pid;
2428 c.event = XFRM_MSG_DELPOLICY;
2429 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2436 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
2439 struct sk_buff *out_skb;
2440 struct sadb_msg *out_hdr;
2443 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2444 if (IS_ERR(out_skb)) {
2445 err = PTR_ERR(out_skb);
2448 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2454 out_hdr = (struct sadb_msg *) out_skb->data;
2455 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2456 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2457 out_hdr->sadb_msg_satype = 0;
2458 out_hdr->sadb_msg_errno = 0;
2459 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2460 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2461 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
2468 static int pfkey_sockaddr_pair_size(sa_family_t family)
2470 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2473 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2474 xfrm_address_t *saddr, xfrm_address_t *daddr,
2479 if (ext_len < 2 || ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2482 af = pfkey_sockaddr_extract(sa, saddr);
2486 socklen = pfkey_sockaddr_len(af);
2487 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2495 #ifdef CONFIG_NET_KEY_MIGRATE
2496 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2497 struct xfrm_migrate *m)
2500 struct sadb_x_ipsecrequest *rq2;
2503 if (len < sizeof(*rq1) ||
2504 len < rq1->sadb_x_ipsecrequest_len ||
2505 rq1->sadb_x_ipsecrequest_len < sizeof(*rq1))
2509 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2510 rq1->sadb_x_ipsecrequest_len - sizeof(*rq1),
2511 &m->old_saddr, &m->old_daddr,
2516 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2517 len -= rq1->sadb_x_ipsecrequest_len;
2519 if (len <= sizeof(*rq2) ||
2520 len < rq2->sadb_x_ipsecrequest_len ||
2521 rq2->sadb_x_ipsecrequest_len < sizeof(*rq2))
2525 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2526 rq2->sadb_x_ipsecrequest_len - sizeof(*rq2),
2527 &m->new_saddr, &m->new_daddr,
2532 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2533 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2534 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2537 m->proto = rq1->sadb_x_ipsecrequest_proto;
2538 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2541 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2543 return ((int)(rq1->sadb_x_ipsecrequest_len +
2544 rq2->sadb_x_ipsecrequest_len));
2547 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2548 const struct sadb_msg *hdr, void * const *ext_hdrs)
2550 int i, len, ret, err = -EINVAL;
2552 struct sadb_address *sa;
2553 struct sadb_x_kmaddress *kma;
2554 struct sadb_x_policy *pol;
2555 struct sadb_x_ipsecrequest *rq;
2556 struct xfrm_selector sel;
2557 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2558 struct xfrm_kmaddress k;
2559 struct net *net = sock_net(sk);
2561 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2562 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2563 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2568 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2569 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2571 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2577 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2578 k.reserved = kma->sadb_x_kmaddress_reserved;
2579 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2580 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2581 &k.local, &k.remote, &k.family);
2588 dir = pol->sadb_x_policy_dir - 1;
2589 memset(&sel, 0, sizeof(sel));
2591 /* set source address info of selector */
2592 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2593 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2594 sel.prefixlen_s = sa->sadb_address_prefixlen;
2595 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2596 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2598 sel.sport_mask = htons(0xffff);
2600 /* set destination address info of selector */
2601 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
2602 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2603 sel.prefixlen_d = sa->sadb_address_prefixlen;
2604 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2605 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2607 sel.dport_mask = htons(0xffff);
2609 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2611 /* extract ipsecrequests */
2613 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2615 while (len > 0 && i < XFRM_MAX_DEPTH) {
2616 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2621 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2627 if (!i || len > 0) {
2632 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2633 kma ? &k : NULL, net, NULL, 0);
2639 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2640 const struct sadb_msg *hdr, void * const *ext_hdrs)
2642 return -ENOPROTOOPT;
2647 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2649 struct net *net = sock_net(sk);
2651 int err = 0, delete;
2652 struct sadb_x_policy *pol;
2653 struct xfrm_policy *xp;
2656 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2659 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2660 if (dir >= XFRM_POLICY_MAX)
2663 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2664 xp = xfrm_policy_byid(net, &dummy_mark, 0, XFRM_POLICY_TYPE_MAIN,
2665 dir, pol->sadb_x_policy_id, delete, &err);
2670 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2674 c.seq = hdr->sadb_msg_seq;
2675 c.portid = hdr->sadb_msg_pid;
2677 c.event = XFRM_MSG_DELPOLICY;
2678 km_policy_notify(xp, dir, &c);
2680 err = key_pol_get_resp(sk, xp, hdr, dir);
2688 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2690 struct pfkey_sock *pfk = ptr;
2691 struct sk_buff *out_skb;
2692 struct sadb_msg *out_hdr;
2695 if (!pfkey_can_dump(&pfk->sk))
2698 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2699 if (IS_ERR(out_skb))
2700 return PTR_ERR(out_skb);
2702 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2708 out_hdr = (struct sadb_msg *) out_skb->data;
2709 out_hdr->sadb_msg_version = pfk->dump.msg_version;
2710 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2711 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2712 out_hdr->sadb_msg_errno = 0;
2713 out_hdr->sadb_msg_seq = count + 1;
2714 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
2717 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
2718 &pfk->sk, sock_net(&pfk->sk));
2719 pfk->dump.skb = out_skb;
2724 static int pfkey_dump_sp(struct pfkey_sock *pfk)
2726 struct net *net = sock_net(&pfk->sk);
2727 return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2730 static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2732 struct net *net = sock_net((struct sock *)pfk);
2734 xfrm_policy_walk_done(&pfk->dump.u.policy, net);
2737 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2739 struct pfkey_sock *pfk = pfkey_sk(sk);
2741 mutex_lock(&pfk->dump_lock);
2742 if (pfk->dump.dump != NULL) {
2743 mutex_unlock(&pfk->dump_lock);
2747 pfk->dump.msg_version = hdr->sadb_msg_version;
2748 pfk->dump.msg_portid = hdr->sadb_msg_pid;
2749 pfk->dump.dump = pfkey_dump_sp;
2750 pfk->dump.done = pfkey_dump_sp_done;
2751 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2752 mutex_unlock(&pfk->dump_lock);
2754 return pfkey_do_dump(pfk);
2757 static int key_notify_policy_flush(const struct km_event *c)
2759 struct sk_buff *skb_out;
2760 struct sadb_msg *hdr;
2762 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2765 hdr = skb_put(skb_out, sizeof(struct sadb_msg));
2766 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2767 hdr->sadb_msg_seq = c->seq;
2768 hdr->sadb_msg_pid = c->portid;
2769 hdr->sadb_msg_version = PF_KEY_V2;
2770 hdr->sadb_msg_errno = (uint8_t) 0;
2771 hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2772 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2773 hdr->sadb_msg_reserved = 0;
2774 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
2779 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2781 struct net *net = sock_net(sk);
2785 err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, true);
2786 err2 = unicast_flush_resp(sk, hdr);
2788 if (err == -ESRCH) /* empty table - old silent behavior */
2793 c.data.type = XFRM_POLICY_TYPE_MAIN;
2794 c.event = XFRM_MSG_FLUSHPOLICY;
2795 c.portid = hdr->sadb_msg_pid;
2796 c.seq = hdr->sadb_msg_seq;
2798 km_policy_notify(NULL, 0, &c);
2803 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2804 const struct sadb_msg *hdr, void * const *ext_hdrs);
2805 static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2806 [SADB_RESERVED] = pfkey_reserved,
2807 [SADB_GETSPI] = pfkey_getspi,
2808 [SADB_UPDATE] = pfkey_add,
2809 [SADB_ADD] = pfkey_add,
2810 [SADB_DELETE] = pfkey_delete,
2811 [SADB_GET] = pfkey_get,
2812 [SADB_ACQUIRE] = pfkey_acquire,
2813 [SADB_REGISTER] = pfkey_register,
2814 [SADB_EXPIRE] = NULL,
2815 [SADB_FLUSH] = pfkey_flush,
2816 [SADB_DUMP] = pfkey_dump,
2817 [SADB_X_PROMISC] = pfkey_promisc,
2818 [SADB_X_PCHANGE] = NULL,
2819 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2820 [SADB_X_SPDADD] = pfkey_spdadd,
2821 [SADB_X_SPDDELETE] = pfkey_spddelete,
2822 [SADB_X_SPDGET] = pfkey_spdget,
2823 [SADB_X_SPDACQUIRE] = NULL,
2824 [SADB_X_SPDDUMP] = pfkey_spddump,
2825 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2826 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2827 [SADB_X_SPDDELETE2] = pfkey_spdget,
2828 [SADB_X_MIGRATE] = pfkey_migrate,
2831 static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
2833 void *ext_hdrs[SADB_EXT_MAX];
2836 /* Non-zero return value of pfkey_broadcast() does not always signal
2837 * an error and even on an actual error we may still want to process
2838 * the message so rather ignore the return value.
2840 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2841 BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
2843 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2844 err = parse_exthdrs(skb, hdr, ext_hdrs);
2847 if (pfkey_funcs[hdr->sadb_msg_type])
2848 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2853 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2855 struct sadb_msg *hdr = NULL;
2857 if (skb->len < sizeof(*hdr)) {
2860 hdr = (struct sadb_msg *) skb->data;
2861 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2862 hdr->sadb_msg_reserved != 0 ||
2863 (hdr->sadb_msg_type <= SADB_RESERVED ||
2864 hdr->sadb_msg_type > SADB_MAX)) {
2867 } else if (hdr->sadb_msg_len != (skb->len /
2868 sizeof(uint64_t)) ||
2869 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2870 sizeof(uint64_t))) {
2880 static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2881 const struct xfrm_algo_desc *d)
2883 unsigned int id = d->desc.sadb_alg_id;
2885 if (id >= sizeof(t->aalgos) * 8)
2888 return (t->aalgos >> id) & 1;
2891 static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2892 const struct xfrm_algo_desc *d)
2894 unsigned int id = d->desc.sadb_alg_id;
2896 if (id >= sizeof(t->ealgos) * 8)
2899 return (t->ealgos >> id) & 1;
2902 static int count_ah_combs(const struct xfrm_tmpl *t)
2906 for (i = 0; ; i++) {
2907 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2910 if (!aalg->pfkey_supported)
2912 if (aalg_tmpl_set(t, aalg) && aalg->available)
2913 sz += sizeof(struct sadb_comb);
2915 return sz + sizeof(struct sadb_prop);
2918 static int count_esp_combs(const struct xfrm_tmpl *t)
2922 for (i = 0; ; i++) {
2923 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2927 if (!ealg->pfkey_supported)
2930 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2933 for (k = 1; ; k++) {
2934 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2938 if (!aalg->pfkey_supported)
2941 if (aalg_tmpl_set(t, aalg) && aalg->available)
2942 sz += sizeof(struct sadb_comb);
2945 return sz + sizeof(struct sadb_prop);
2948 static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2950 struct sadb_prop *p;
2953 p = skb_put(skb, sizeof(struct sadb_prop));
2954 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2955 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2956 p->sadb_prop_replay = 32;
2957 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2959 for (i = 0; ; i++) {
2960 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2964 if (!aalg->pfkey_supported)
2967 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2968 struct sadb_comb *c;
2969 c = skb_put_zero(skb, sizeof(struct sadb_comb));
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_hard_addtime = 24*60*60;
2975 c->sadb_comb_soft_addtime = 20*60*60;
2976 c->sadb_comb_hard_usetime = 8*60*60;
2977 c->sadb_comb_soft_usetime = 7*60*60;
2982 static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2984 struct sadb_prop *p;
2987 p = skb_put(skb, sizeof(struct sadb_prop));
2988 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2989 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2990 p->sadb_prop_replay = 32;
2991 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2994 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2998 if (!ealg->pfkey_supported)
3001 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
3004 for (k = 1; ; k++) {
3005 struct sadb_comb *c;
3006 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
3009 if (!aalg->pfkey_supported)
3011 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
3013 c = skb_put(skb, sizeof(struct sadb_comb));
3014 memset(c, 0, sizeof(*c));
3015 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
3016 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
3017 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
3018 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
3019 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
3020 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
3021 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
3022 c->sadb_comb_hard_addtime = 24*60*60;
3023 c->sadb_comb_soft_addtime = 20*60*60;
3024 c->sadb_comb_hard_usetime = 8*60*60;
3025 c->sadb_comb_soft_usetime = 7*60*60;
3030 static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
3035 static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
3037 struct sk_buff *out_skb;
3038 struct sadb_msg *out_hdr;
3042 hard = c->data.hard;
3048 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
3049 if (IS_ERR(out_skb))
3050 return PTR_ERR(out_skb);
3052 out_hdr = (struct sadb_msg *) out_skb->data;
3053 out_hdr->sadb_msg_version = PF_KEY_V2;
3054 out_hdr->sadb_msg_type = SADB_EXPIRE;
3055 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3056 out_hdr->sadb_msg_errno = 0;
3057 out_hdr->sadb_msg_reserved = 0;
3058 out_hdr->sadb_msg_seq = 0;
3059 out_hdr->sadb_msg_pid = 0;
3061 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3066 static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
3068 struct net *net = x ? xs_net(x) : c->net;
3069 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3071 if (atomic_read(&net_pfkey->socks_nr) == 0)
3075 case XFRM_MSG_EXPIRE:
3076 return key_notify_sa_expire(x, c);
3077 case XFRM_MSG_DELSA:
3078 case XFRM_MSG_NEWSA:
3079 case XFRM_MSG_UPDSA:
3080 return key_notify_sa(x, c);
3081 case XFRM_MSG_FLUSHSA:
3082 return key_notify_sa_flush(c);
3083 case XFRM_MSG_NEWAE: /* not yet supported */
3086 pr_err("pfkey: Unknown SA event %d\n", c->event);
3093 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3095 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3099 case XFRM_MSG_POLEXPIRE:
3100 return key_notify_policy_expire(xp, c);
3101 case XFRM_MSG_DELPOLICY:
3102 case XFRM_MSG_NEWPOLICY:
3103 case XFRM_MSG_UPDPOLICY:
3104 return key_notify_policy(xp, dir, c);
3105 case XFRM_MSG_FLUSHPOLICY:
3106 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3108 return key_notify_policy_flush(c);
3110 pr_err("pfkey: Unknown policy event %d\n", c->event);
3117 static u32 get_acqseq(void)
3120 static atomic_t acqseq;
3123 res = atomic_inc_return(&acqseq);
3128 static bool pfkey_is_alive(const struct km_event *c)
3130 struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id);
3132 bool is_alive = false;
3135 sk_for_each_rcu(sk, &net_pfkey->table) {
3136 if (pfkey_sk(sk)->registered) {
3146 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
3148 struct sk_buff *skb;
3149 struct sadb_msg *hdr;
3150 struct sadb_address *addr;
3151 struct sadb_x_policy *pol;
3154 struct sadb_x_sec_ctx *sec_ctx;
3155 struct xfrm_sec_ctx *xfrm_ctx;
3158 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3162 size = sizeof(struct sadb_msg) +
3163 (sizeof(struct sadb_address) * 2) +
3164 (sockaddr_size * 2) +
3165 sizeof(struct sadb_x_policy);
3167 if (x->id.proto == IPPROTO_AH)
3168 size += count_ah_combs(t);
3169 else if (x->id.proto == IPPROTO_ESP)
3170 size += count_esp_combs(t);
3172 if ((xfrm_ctx = x->security)) {
3173 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3174 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3177 skb = alloc_skb(size + 16, GFP_ATOMIC);
3181 hdr = skb_put(skb, sizeof(struct sadb_msg));
3182 hdr->sadb_msg_version = PF_KEY_V2;
3183 hdr->sadb_msg_type = SADB_ACQUIRE;
3184 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3185 hdr->sadb_msg_len = size / sizeof(uint64_t);
3186 hdr->sadb_msg_errno = 0;
3187 hdr->sadb_msg_reserved = 0;
3188 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3189 hdr->sadb_msg_pid = 0;
3192 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3193 addr->sadb_address_len =
3194 (sizeof(struct sadb_address)+sockaddr_size)/
3196 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3197 addr->sadb_address_proto = 0;
3198 addr->sadb_address_reserved = 0;
3199 addr->sadb_address_prefixlen =
3200 pfkey_sockaddr_fill(&x->props.saddr, 0,
3201 (struct sockaddr *) (addr + 1),
3203 if (!addr->sadb_address_prefixlen)
3207 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3208 addr->sadb_address_len =
3209 (sizeof(struct sadb_address)+sockaddr_size)/
3211 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3212 addr->sadb_address_proto = 0;
3213 addr->sadb_address_reserved = 0;
3214 addr->sadb_address_prefixlen =
3215 pfkey_sockaddr_fill(&x->id.daddr, 0,
3216 (struct sockaddr *) (addr + 1),
3218 if (!addr->sadb_address_prefixlen)
3221 pol = skb_put(skb, sizeof(struct sadb_x_policy));
3222 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3223 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3224 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3225 pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
3226 pol->sadb_x_policy_reserved = 0;
3227 pol->sadb_x_policy_id = xp->index;
3228 pol->sadb_x_policy_priority = xp->priority;
3230 /* Set sadb_comb's. */
3231 if (x->id.proto == IPPROTO_AH)
3232 dump_ah_combs(skb, t);
3233 else if (x->id.proto == IPPROTO_ESP)
3234 dump_esp_combs(skb, t);
3236 /* security context */
3238 sec_ctx = skb_put(skb,
3239 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3240 sec_ctx->sadb_x_sec_len =
3241 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3242 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3243 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3244 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3245 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3246 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3250 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3254 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3255 u8 *data, int len, int *dir)
3257 struct net *net = sock_net(sk);
3258 struct xfrm_policy *xp;
3259 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3260 struct sadb_x_sec_ctx *sec_ctx;
3262 switch (sk->sk_family) {
3264 if (opt != IP_IPSEC_POLICY) {
3269 #if IS_ENABLED(CONFIG_IPV6)
3271 if (opt != IPV6_IPSEC_POLICY) {
3284 if (len < sizeof(struct sadb_x_policy) ||
3285 pol->sadb_x_policy_len*8 > len ||
3286 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3287 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3290 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3296 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3297 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3299 xp->lft.soft_byte_limit = XFRM_INF;
3300 xp->lft.hard_byte_limit = XFRM_INF;
3301 xp->lft.soft_packet_limit = XFRM_INF;
3302 xp->lft.hard_packet_limit = XFRM_INF;
3303 xp->family = sk->sk_family;
3306 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3307 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3310 /* security context too */
3311 if (len >= (pol->sadb_x_policy_len*8 +
3312 sizeof(struct sadb_x_sec_ctx))) {
3313 char *p = (char *)pol;
3314 struct xfrm_user_sec_ctx *uctx;
3316 p += pol->sadb_x_policy_len*8;
3317 sec_ctx = (struct sadb_x_sec_ctx *)p;
3318 if (len < pol->sadb_x_policy_len*8 +
3319 sec_ctx->sadb_x_sec_len*8) {
3323 if ((*dir = verify_sec_ctx_len(p)))
3325 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC);
3326 *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC);
3333 *dir = pol->sadb_x_policy_dir-1;
3338 xfrm_policy_destroy(xp);
3342 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3344 struct sk_buff *skb;
3345 struct sadb_msg *hdr;
3347 struct sadb_address *addr;
3348 struct sadb_x_nat_t_port *n_port;
3351 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3352 struct xfrm_encap_tmpl *natt = NULL;
3354 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3366 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3368 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3369 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3372 size = sizeof(struct sadb_msg) +
3373 sizeof(struct sadb_sa) +
3374 (sizeof(struct sadb_address) * 2) +
3375 (sockaddr_size * 2) +
3376 (sizeof(struct sadb_x_nat_t_port) * 2);
3378 skb = alloc_skb(size + 16, GFP_ATOMIC);
3382 hdr = skb_put(skb, sizeof(struct sadb_msg));
3383 hdr->sadb_msg_version = PF_KEY_V2;
3384 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3385 hdr->sadb_msg_satype = satype;
3386 hdr->sadb_msg_len = size / sizeof(uint64_t);
3387 hdr->sadb_msg_errno = 0;
3388 hdr->sadb_msg_reserved = 0;
3389 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3390 hdr->sadb_msg_pid = 0;
3393 sa = skb_put(skb, sizeof(struct sadb_sa));
3394 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3395 sa->sadb_sa_exttype = SADB_EXT_SA;
3396 sa->sadb_sa_spi = x->id.spi;
3397 sa->sadb_sa_replay = 0;
3398 sa->sadb_sa_state = 0;
3399 sa->sadb_sa_auth = 0;
3400 sa->sadb_sa_encrypt = 0;
3401 sa->sadb_sa_flags = 0;
3403 /* ADDRESS_SRC (old addr) */
3404 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3405 addr->sadb_address_len =
3406 (sizeof(struct sadb_address)+sockaddr_size)/
3408 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3409 addr->sadb_address_proto = 0;
3410 addr->sadb_address_reserved = 0;
3411 addr->sadb_address_prefixlen =
3412 pfkey_sockaddr_fill(&x->props.saddr, 0,
3413 (struct sockaddr *) (addr + 1),
3415 if (!addr->sadb_address_prefixlen)
3418 /* NAT_T_SPORT (old port) */
3419 n_port = skb_put(skb, sizeof(*n_port));
3420 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3421 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3422 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3423 n_port->sadb_x_nat_t_port_reserved = 0;
3425 /* ADDRESS_DST (new addr) */
3426 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3427 addr->sadb_address_len =
3428 (sizeof(struct sadb_address)+sockaddr_size)/
3430 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3431 addr->sadb_address_proto = 0;
3432 addr->sadb_address_reserved = 0;
3433 addr->sadb_address_prefixlen =
3434 pfkey_sockaddr_fill(ipaddr, 0,
3435 (struct sockaddr *) (addr + 1),
3437 if (!addr->sadb_address_prefixlen)
3440 /* NAT_T_DPORT (new port) */
3441 n_port = skb_put(skb, sizeof(*n_port));
3442 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3443 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3444 n_port->sadb_x_nat_t_port_port = sport;
3445 n_port->sadb_x_nat_t_port_reserved = 0;
3447 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3451 #ifdef CONFIG_NET_KEY_MIGRATE
3452 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3453 const struct xfrm_selector *sel)
3455 struct sadb_address *addr;
3456 addr = skb_put(skb, sizeof(struct sadb_address) + sasize);
3457 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3458 addr->sadb_address_exttype = type;
3459 addr->sadb_address_proto = sel->proto;
3460 addr->sadb_address_reserved = 0;
3463 case SADB_EXT_ADDRESS_SRC:
3464 addr->sadb_address_prefixlen = sel->prefixlen_s;
3465 pfkey_sockaddr_fill(&sel->saddr, 0,
3466 (struct sockaddr *)(addr + 1),
3469 case SADB_EXT_ADDRESS_DST:
3470 addr->sadb_address_prefixlen = sel->prefixlen_d;
3471 pfkey_sockaddr_fill(&sel->daddr, 0,
3472 (struct sockaddr *)(addr + 1),
3483 static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
3485 struct sadb_x_kmaddress *kma;
3487 int family = k->family;
3488 int socklen = pfkey_sockaddr_len(family);
3491 size_req = (sizeof(struct sadb_x_kmaddress) +
3492 pfkey_sockaddr_pair_size(family));
3494 kma = skb_put_zero(skb, size_req);
3495 kma->sadb_x_kmaddress_len = size_req / 8;
3496 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3497 kma->sadb_x_kmaddress_reserved = k->reserved;
3499 sa = (u8 *)(kma + 1);
3500 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3501 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3507 static int set_ipsecrequest(struct sk_buff *skb,
3508 uint8_t proto, uint8_t mode, int level,
3509 uint32_t reqid, uint8_t family,
3510 const xfrm_address_t *src, const xfrm_address_t *dst)
3512 struct sadb_x_ipsecrequest *rq;
3514 int socklen = pfkey_sockaddr_len(family);
3517 size_req = sizeof(struct sadb_x_ipsecrequest) +
3518 pfkey_sockaddr_pair_size(family);
3520 rq = skb_put_zero(skb, size_req);
3521 rq->sadb_x_ipsecrequest_len = size_req;
3522 rq->sadb_x_ipsecrequest_proto = proto;
3523 rq->sadb_x_ipsecrequest_mode = mode;
3524 rq->sadb_x_ipsecrequest_level = level;
3525 rq->sadb_x_ipsecrequest_reqid = reqid;
3527 sa = (u8 *) (rq + 1);
3528 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3529 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3536 #ifdef CONFIG_NET_KEY_MIGRATE
3537 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3538 const struct xfrm_migrate *m, int num_bundles,
3539 const struct xfrm_kmaddress *k,
3540 const struct xfrm_encap_tmpl *encap)
3546 struct sk_buff *skb;
3547 struct sadb_msg *hdr;
3548 struct sadb_x_policy *pol;
3549 const struct xfrm_migrate *mp;
3551 if (type != XFRM_POLICY_TYPE_MAIN)
3554 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3558 /* addresses for KM */
3559 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3560 pfkey_sockaddr_pair_size(k->family));
3564 sasize_sel = pfkey_sockaddr_size(sel->family);
3567 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3570 size_pol += sizeof(struct sadb_x_policy);
3573 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3574 /* old locator pair */
3575 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3576 pfkey_sockaddr_pair_size(mp->old_family);
3577 /* new locator pair */
3578 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3579 pfkey_sockaddr_pair_size(mp->new_family);
3582 size += sizeof(struct sadb_msg) + size_pol;
3585 skb = alloc_skb(size, GFP_ATOMIC);
3589 hdr = skb_put(skb, sizeof(struct sadb_msg));
3590 hdr->sadb_msg_version = PF_KEY_V2;
3591 hdr->sadb_msg_type = SADB_X_MIGRATE;
3592 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3593 hdr->sadb_msg_len = size / 8;
3594 hdr->sadb_msg_errno = 0;
3595 hdr->sadb_msg_reserved = 0;
3596 hdr->sadb_msg_seq = 0;
3597 hdr->sadb_msg_pid = 0;
3599 /* Addresses to be used by KM for negotiation, if ext is available */
3600 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3604 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3607 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3609 /* policy information */
3610 pol = skb_put(skb, sizeof(struct sadb_x_policy));
3611 pol->sadb_x_policy_len = size_pol / 8;
3612 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3613 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3614 pol->sadb_x_policy_dir = dir + 1;
3615 pol->sadb_x_policy_reserved = 0;
3616 pol->sadb_x_policy_id = 0;
3617 pol->sadb_x_policy_priority = 0;
3619 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3620 /* old ipsecrequest */
3621 int mode = pfkey_mode_from_xfrm(mp->mode);
3624 if (set_ipsecrequest(skb, mp->proto, mode,
3625 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3626 mp->reqid, mp->old_family,
3627 &mp->old_saddr, &mp->old_daddr) < 0)
3630 /* new ipsecrequest */
3631 if (set_ipsecrequest(skb, mp->proto, mode,
3632 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3633 mp->reqid, mp->new_family,
3634 &mp->new_saddr, &mp->new_daddr) < 0)
3638 /* broadcast migrate message to sockets */
3639 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
3648 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3649 const struct xfrm_migrate *m, int num_bundles,
3650 const struct xfrm_kmaddress *k,
3651 const struct xfrm_encap_tmpl *encap)
3653 return -ENOPROTOOPT;
3657 static int pfkey_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
3659 struct sock *sk = sock->sk;
3660 struct sk_buff *skb = NULL;
3661 struct sadb_msg *hdr = NULL;
3663 struct net *net = sock_net(sk);
3666 if (msg->msg_flags & MSG_OOB)
3670 if ((unsigned int)len > sk->sk_sndbuf - 32)
3674 skb = alloc_skb(len, GFP_KERNEL);
3679 if (memcpy_from_msg(skb_put(skb,len), msg, len))
3682 hdr = pfkey_get_base_msg(skb, &err);
3686 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
3687 err = pfkey_process(sk, skb, hdr);
3688 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
3691 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3698 static int pfkey_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
3701 struct sock *sk = sock->sk;
3702 struct pfkey_sock *pfk = pfkey_sk(sk);
3703 struct sk_buff *skb;
3707 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3710 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3716 msg->msg_flags |= MSG_TRUNC;
3720 skb_reset_transport_header(skb);
3721 err = skb_copy_datagram_msg(skb, 0, msg, copied);
3725 sock_recv_ts_and_drops(msg, sk, skb);
3727 err = (flags & MSG_TRUNC) ? skb->len : copied;
3729 if (pfk->dump.dump != NULL &&
3730 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3734 skb_free_datagram(sk, skb);
3739 static const struct proto_ops pfkey_ops = {
3741 .owner = THIS_MODULE,
3742 /* Operations that make no sense on pfkey sockets. */
3743 .bind = sock_no_bind,
3744 .connect = sock_no_connect,
3745 .socketpair = sock_no_socketpair,
3746 .accept = sock_no_accept,
3747 .getname = sock_no_getname,
3748 .ioctl = sock_no_ioctl,
3749 .listen = sock_no_listen,
3750 .shutdown = sock_no_shutdown,
3751 .mmap = sock_no_mmap,
3752 .sendpage = sock_no_sendpage,
3754 /* Now the operations that really occur. */
3755 .release = pfkey_release,
3756 .poll = datagram_poll,
3757 .sendmsg = pfkey_sendmsg,
3758 .recvmsg = pfkey_recvmsg,
3761 static const struct net_proto_family pfkey_family_ops = {
3763 .create = pfkey_create,
3764 .owner = THIS_MODULE,
3767 #ifdef CONFIG_PROC_FS
3768 static int pfkey_seq_show(struct seq_file *f, void *v)
3770 struct sock *s = sk_entry(v);
3772 if (v == SEQ_START_TOKEN)
3773 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3775 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
3777 refcount_read(&s->sk_refcnt),
3778 sk_rmem_alloc_get(s),
3779 sk_wmem_alloc_get(s),
3780 from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
3786 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3789 struct net *net = seq_file_net(f);
3790 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3793 return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
3796 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3798 struct net *net = seq_file_net(f);
3799 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3801 return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
3804 static void pfkey_seq_stop(struct seq_file *f, void *v)
3810 static const struct seq_operations pfkey_seq_ops = {
3811 .start = pfkey_seq_start,
3812 .next = pfkey_seq_next,
3813 .stop = pfkey_seq_stop,
3814 .show = pfkey_seq_show,
3817 static int __net_init pfkey_init_proc(struct net *net)
3819 struct proc_dir_entry *e;
3821 e = proc_create_net("pfkey", 0, net->proc_net, &pfkey_seq_ops,
3822 sizeof(struct seq_net_private));
3829 static void __net_exit pfkey_exit_proc(struct net *net)
3831 remove_proc_entry("pfkey", net->proc_net);
3834 static inline int pfkey_init_proc(struct net *net)
3839 static inline void pfkey_exit_proc(struct net *net)
3844 static struct xfrm_mgr pfkeyv2_mgr =
3846 .notify = pfkey_send_notify,
3847 .acquire = pfkey_send_acquire,
3848 .compile_policy = pfkey_compile_policy,
3849 .new_mapping = pfkey_send_new_mapping,
3850 .notify_policy = pfkey_send_policy_notify,
3851 .migrate = pfkey_send_migrate,
3852 .is_alive = pfkey_is_alive,
3855 static int __net_init pfkey_net_init(struct net *net)
3857 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3860 INIT_HLIST_HEAD(&net_pfkey->table);
3861 atomic_set(&net_pfkey->socks_nr, 0);
3863 rv = pfkey_init_proc(net);
3868 static void __net_exit pfkey_net_exit(struct net *net)
3870 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3872 pfkey_exit_proc(net);
3873 WARN_ON(!hlist_empty(&net_pfkey->table));
3876 static struct pernet_operations pfkey_net_ops = {
3877 .init = pfkey_net_init,
3878 .exit = pfkey_net_exit,
3879 .id = &pfkey_net_id,
3880 .size = sizeof(struct netns_pfkey),
3883 static void __exit ipsec_pfkey_exit(void)
3885 xfrm_unregister_km(&pfkeyv2_mgr);
3886 sock_unregister(PF_KEY);
3887 unregister_pernet_subsys(&pfkey_net_ops);
3888 proto_unregister(&key_proto);
3891 static int __init ipsec_pfkey_init(void)
3893 int err = proto_register(&key_proto, 0);
3898 err = register_pernet_subsys(&pfkey_net_ops);
3900 goto out_unregister_key_proto;
3901 err = sock_register(&pfkey_family_ops);
3903 goto out_unregister_pernet;
3904 err = xfrm_register_km(&pfkeyv2_mgr);
3906 goto out_sock_unregister;
3910 out_sock_unregister:
3911 sock_unregister(PF_KEY);
3912 out_unregister_pernet:
3913 unregister_pernet_subsys(&pfkey_net_ops);
3914 out_unregister_key_proto:
3915 proto_unregister(&key_proto);
3919 module_init(ipsec_pfkey_init);
3920 module_exit(ipsec_pfkey_exit);
3921 MODULE_LICENSE("GPL");
3922 MODULE_ALIAS_NETPROTO(PF_KEY);