2 * net/key/af_key.c An implementation of PF_KEYv2 sockets.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
9 * Authors: Maxim Giryaev <gem@asplinux.ru>
10 * David S. Miller <davem@redhat.com>
11 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
12 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
14 * Derek Atkins <derek@ihtfp.com>
17 #include <linux/capability.h>
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/socket.h>
21 #include <linux/pfkeyv2.h>
22 #include <linux/ipsec.h>
23 #include <linux/skbuff.h>
24 #include <linux/rtnetlink.h>
26 #include <linux/in6.h>
27 #include <linux/proc_fs.h>
28 #include <linux/init.h>
29 #include <linux/slab.h>
30 #include <net/net_namespace.h>
31 #include <net/netns/generic.h>
36 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
37 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
39 static unsigned int pfkey_net_id __read_mostly;
41 /* List of all pfkey sockets. */
42 struct hlist_head table;
45 static DEFINE_MUTEX(pfkey_mutex);
48 static const struct xfrm_mark dummy_mark = {0, 0};
50 /* struct sock must be the first member of struct pfkey_sock */
58 int (*dump)(struct pfkey_sock *sk);
59 void (*done)(struct pfkey_sock *sk);
61 struct xfrm_policy_walk policy;
62 struct xfrm_state_walk state;
66 struct mutex dump_lock;
69 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
70 xfrm_address_t *saddr, xfrm_address_t *daddr,
73 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
75 return (struct pfkey_sock *)sk;
78 static int pfkey_can_dump(const struct sock *sk)
80 if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
85 static void pfkey_terminate_dump(struct pfkey_sock *pfk)
89 kfree_skb(pfk->dump.skb);
93 pfk->dump.dump = NULL;
94 pfk->dump.done = NULL;
98 static void pfkey_sock_destruct(struct sock *sk)
100 struct net *net = sock_net(sk);
101 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
103 pfkey_terminate_dump(pfkey_sk(sk));
104 skb_queue_purge(&sk->sk_receive_queue);
106 if (!sock_flag(sk, SOCK_DEAD)) {
107 pr_err("Attempt to release alive pfkey socket: %p\n", sk);
111 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
112 WARN_ON(refcount_read(&sk->sk_wmem_alloc));
114 atomic_dec(&net_pfkey->socks_nr);
117 static const struct proto_ops pfkey_ops;
119 static void pfkey_insert(struct sock *sk)
121 struct net *net = sock_net(sk);
122 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
124 mutex_lock(&pfkey_mutex);
125 sk_add_node_rcu(sk, &net_pfkey->table);
126 mutex_unlock(&pfkey_mutex);
129 static void pfkey_remove(struct sock *sk)
131 mutex_lock(&pfkey_mutex);
132 sk_del_node_init_rcu(sk);
133 mutex_unlock(&pfkey_mutex);
136 static struct proto key_proto = {
138 .owner = THIS_MODULE,
139 .obj_size = sizeof(struct pfkey_sock),
142 static int pfkey_create(struct net *net, struct socket *sock, int protocol,
145 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
147 struct pfkey_sock *pfk;
150 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
152 if (sock->type != SOCK_RAW)
153 return -ESOCKTNOSUPPORT;
154 if (protocol != PF_KEY_V2)
155 return -EPROTONOSUPPORT;
158 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto, kern);
163 mutex_init(&pfk->dump_lock);
165 sock->ops = &pfkey_ops;
166 sock_init_data(sock, sk);
168 sk->sk_family = PF_KEY;
169 sk->sk_destruct = pfkey_sock_destruct;
171 atomic_inc(&net_pfkey->socks_nr);
180 static int pfkey_release(struct socket *sock)
182 struct sock *sk = sock->sk;
191 skb_queue_purge(&sk->sk_write_queue);
199 static int pfkey_broadcast_one(struct sk_buff *skb, gfp_t allocation,
204 if (atomic_read(&sk->sk_rmem_alloc) > sk->sk_rcvbuf)
207 skb = skb_clone(skb, allocation);
210 skb_set_owner_r(skb, sk);
211 skb_queue_tail(&sk->sk_receive_queue, skb);
212 sk->sk_data_ready(sk);
218 /* Send SKB to all pfkey sockets matching selected criteria. */
219 #define BROADCAST_ALL 0
220 #define BROADCAST_ONE 1
221 #define BROADCAST_REGISTERED 2
222 #define BROADCAST_PROMISC_ONLY 4
223 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
224 int broadcast_flags, struct sock *one_sk,
227 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
231 /* XXX Do we need something like netlink_overrun? I think
232 * XXX PF_KEY socket apps will not mind current behavior.
238 sk_for_each_rcu(sk, &net_pfkey->table) {
239 struct pfkey_sock *pfk = pfkey_sk(sk);
242 /* Yes, it means that if you are meant to receive this
243 * pfkey message you receive it twice as promiscuous
247 pfkey_broadcast_one(skb, GFP_ATOMIC, sk);
249 /* the exact target will be processed later */
252 if (broadcast_flags != BROADCAST_ALL) {
253 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
255 if ((broadcast_flags & BROADCAST_REGISTERED) &&
258 if (broadcast_flags & BROADCAST_ONE)
262 err2 = pfkey_broadcast_one(skb, GFP_ATOMIC, sk);
264 /* Error is cleared after successful sending to at least one
266 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
272 err = pfkey_broadcast_one(skb, allocation, one_sk);
278 static int pfkey_do_dump(struct pfkey_sock *pfk)
280 struct sadb_msg *hdr;
283 mutex_lock(&pfk->dump_lock);
284 if (!pfk->dump.dump) {
289 rc = pfk->dump.dump(pfk);
290 if (rc == -ENOBUFS) {
296 if (!pfkey_can_dump(&pfk->sk)) {
301 hdr = (struct sadb_msg *) pfk->dump.skb->data;
302 hdr->sadb_msg_seq = 0;
303 hdr->sadb_msg_errno = rc;
304 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
305 &pfk->sk, sock_net(&pfk->sk));
306 pfk->dump.skb = NULL;
309 pfkey_terminate_dump(pfk);
312 mutex_unlock(&pfk->dump_lock);
316 static inline void pfkey_hdr_dup(struct sadb_msg *new,
317 const struct sadb_msg *orig)
322 static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk)
324 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
325 struct sadb_msg *hdr;
330 /* Woe be to the platform trying to support PFKEY yet
331 * having normal errnos outside the 1-255 range, inclusive.
334 if (err == ERESTARTSYS ||
335 err == ERESTARTNOHAND ||
336 err == ERESTARTNOINTR)
340 BUG_ON(err <= 0 || err >= 256);
342 hdr = skb_put(skb, sizeof(struct sadb_msg));
343 pfkey_hdr_dup(hdr, orig);
344 hdr->sadb_msg_errno = (uint8_t) err;
345 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
348 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk));
353 static const u8 sadb_ext_min_len[] = {
354 [SADB_EXT_RESERVED] = (u8) 0,
355 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
356 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
357 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
358 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
359 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
360 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
361 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
362 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
363 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
364 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
365 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
366 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
367 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
368 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
369 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
370 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
371 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
372 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
373 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
374 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
375 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
376 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
377 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
378 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
379 [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress),
380 [SADB_X_EXT_FILTER] = (u8) sizeof(struct sadb_x_filter),
383 /* Verify sadb_address_{len,prefixlen} against sa_family. */
384 static int verify_address_len(const void *p)
386 const struct sadb_address *sp = p;
387 const struct sockaddr *addr = (const struct sockaddr *)(sp + 1);
388 const struct sockaddr_in *sin;
389 #if IS_ENABLED(CONFIG_IPV6)
390 const struct sockaddr_in6 *sin6;
394 if (sp->sadb_address_len <
395 DIV_ROUND_UP(sizeof(*sp) + offsetofend(typeof(*addr), sa_family),
399 switch (addr->sa_family) {
401 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
402 if (sp->sadb_address_len != len ||
403 sp->sadb_address_prefixlen > 32)
406 #if IS_ENABLED(CONFIG_IPV6)
408 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
409 if (sp->sadb_address_len != len ||
410 sp->sadb_address_prefixlen > 128)
415 /* It is user using kernel to keep track of security
416 * associations for another protocol, such as
417 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
420 * XXX Actually, association/policy database is not yet
421 * XXX able to cope with arbitrary sockaddr families.
422 * XXX When it can, remove this -EINVAL. -DaveM
430 static inline int sadb_key_len(const struct sadb_key *key)
432 int key_bytes = DIV_ROUND_UP(key->sadb_key_bits, 8);
434 return DIV_ROUND_UP(sizeof(struct sadb_key) + key_bytes,
438 static int verify_key_len(const void *p)
440 const struct sadb_key *key = p;
442 if (sadb_key_len(key) > key->sadb_key_len)
448 static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx)
450 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
451 sec_ctx->sadb_x_ctx_len,
455 static inline int verify_sec_ctx_len(const void *p)
457 const struct sadb_x_sec_ctx *sec_ctx = p;
458 int len = sec_ctx->sadb_x_ctx_len;
463 len = pfkey_sec_ctx_len(sec_ctx);
465 if (sec_ctx->sadb_x_sec_len != len)
471 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx,
474 struct xfrm_user_sec_ctx *uctx = NULL;
475 int ctx_size = sec_ctx->sadb_x_ctx_len;
477 uctx = kmalloc((sizeof(*uctx)+ctx_size), gfp);
482 uctx->len = pfkey_sec_ctx_len(sec_ctx);
483 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
484 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
485 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
486 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
487 memcpy(uctx + 1, sec_ctx + 1,
493 static int present_and_same_family(const struct sadb_address *src,
494 const struct sadb_address *dst)
496 const struct sockaddr *s_addr, *d_addr;
501 s_addr = (const struct sockaddr *)(src + 1);
502 d_addr = (const struct sockaddr *)(dst + 1);
503 if (s_addr->sa_family != d_addr->sa_family)
505 if (s_addr->sa_family != AF_INET
506 #if IS_ENABLED(CONFIG_IPV6)
507 && s_addr->sa_family != AF_INET6
515 static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs)
517 const char *p = (char *) hdr;
523 const struct sadb_ext *ehdr = (const struct sadb_ext *) p;
527 if (len < sizeof(*ehdr))
530 ext_len = ehdr->sadb_ext_len;
531 ext_len *= sizeof(uint64_t);
532 ext_type = ehdr->sadb_ext_type;
533 if (ext_len < sizeof(uint64_t) ||
535 ext_type == SADB_EXT_RESERVED)
538 if (ext_type <= SADB_EXT_MAX) {
539 int min = (int) sadb_ext_min_len[ext_type];
542 if (ext_hdrs[ext_type-1] != NULL)
545 case SADB_EXT_ADDRESS_SRC:
546 case SADB_EXT_ADDRESS_DST:
547 case SADB_EXT_ADDRESS_PROXY:
548 case SADB_X_EXT_NAT_T_OA:
549 if (verify_address_len(p))
552 case SADB_X_EXT_SEC_CTX:
553 if (verify_sec_ctx_len(p))
556 case SADB_EXT_KEY_AUTH:
557 case SADB_EXT_KEY_ENCRYPT:
558 if (verify_key_len(p))
564 ext_hdrs[ext_type-1] = (void *) p;
574 pfkey_satype2proto(uint8_t satype)
577 case SADB_SATYPE_UNSPEC:
578 return IPSEC_PROTO_ANY;
581 case SADB_SATYPE_ESP:
583 case SADB_X_SATYPE_IPCOMP:
592 pfkey_proto2satype(uint16_t proto)
596 return SADB_SATYPE_AH;
598 return SADB_SATYPE_ESP;
600 return SADB_X_SATYPE_IPCOMP;
607 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
608 * say specifically 'just raw sockets' as we encode them as 255.
611 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
613 return proto == IPSEC_PROTO_ANY ? 0 : proto;
616 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
618 return proto ? proto : IPSEC_PROTO_ANY;
621 static inline int pfkey_sockaddr_len(sa_family_t family)
625 return sizeof(struct sockaddr_in);
626 #if IS_ENABLED(CONFIG_IPV6)
628 return sizeof(struct sockaddr_in6);
635 int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
637 switch (sa->sa_family) {
640 ((struct sockaddr_in *)sa)->sin_addr.s_addr;
642 #if IS_ENABLED(CONFIG_IPV6)
645 &((struct sockaddr_in6 *)sa)->sin6_addr,
646 sizeof(struct in6_addr));
654 int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr)
656 return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
660 static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs)
662 const struct sadb_sa *sa;
663 const struct sadb_address *addr;
665 unsigned short family;
666 xfrm_address_t *xaddr;
668 sa = ext_hdrs[SADB_EXT_SA - 1];
672 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
676 /* sadb_address_len should be checked by caller */
677 addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
681 family = ((const struct sockaddr *)(addr + 1))->sa_family;
684 xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr;
686 #if IS_ENABLED(CONFIG_IPV6)
688 xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr;
698 return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family);
701 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
704 pfkey_sockaddr_size(sa_family_t family)
706 return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
709 static inline int pfkey_mode_from_xfrm(int mode)
712 case XFRM_MODE_TRANSPORT:
713 return IPSEC_MODE_TRANSPORT;
714 case XFRM_MODE_TUNNEL:
715 return IPSEC_MODE_TUNNEL;
717 return IPSEC_MODE_BEET;
723 static inline int pfkey_mode_to_xfrm(int mode)
726 case IPSEC_MODE_ANY: /*XXX*/
727 case IPSEC_MODE_TRANSPORT:
728 return XFRM_MODE_TRANSPORT;
729 case IPSEC_MODE_TUNNEL:
730 return XFRM_MODE_TUNNEL;
731 case IPSEC_MODE_BEET:
732 return XFRM_MODE_BEET;
738 static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port,
740 unsigned short family)
745 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
746 sin->sin_family = AF_INET;
747 sin->sin_port = port;
748 sin->sin_addr.s_addr = xaddr->a4;
749 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
752 #if IS_ENABLED(CONFIG_IPV6)
755 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
756 sin6->sin6_family = AF_INET6;
757 sin6->sin6_port = port;
758 sin6->sin6_flowinfo = 0;
759 sin6->sin6_addr = xaddr->in6;
760 sin6->sin6_scope_id = 0;
768 static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x,
769 int add_keys, int hsc)
772 struct sadb_msg *hdr;
774 struct sadb_lifetime *lifetime;
775 struct sadb_address *addr;
776 struct sadb_key *key;
777 struct sadb_x_sa2 *sa2;
778 struct sadb_x_sec_ctx *sec_ctx;
779 struct xfrm_sec_ctx *xfrm_ctx;
782 int auth_key_size = 0;
783 int encrypt_key_size = 0;
785 struct xfrm_encap_tmpl *natt = NULL;
788 /* address family check */
789 sockaddr_size = pfkey_sockaddr_size(x->props.family);
791 return ERR_PTR(-EINVAL);
793 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
794 key(AE), (identity(SD),) (sensitivity)> */
795 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
796 sizeof(struct sadb_lifetime) +
797 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
798 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
799 sizeof(struct sadb_address)*2 +
801 sizeof(struct sadb_x_sa2);
803 if ((xfrm_ctx = x->security)) {
804 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
805 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
808 /* identity & sensitivity */
809 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family))
810 size += sizeof(struct sadb_address) + sockaddr_size;
813 if (x->aalg && x->aalg->alg_key_len) {
815 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
816 size += sizeof(struct sadb_key) + auth_key_size;
818 if (x->ealg && x->ealg->alg_key_len) {
820 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
821 size += sizeof(struct sadb_key) + encrypt_key_size;
827 if (natt && natt->encap_type) {
828 size += sizeof(struct sadb_x_nat_t_type);
829 size += sizeof(struct sadb_x_nat_t_port);
830 size += sizeof(struct sadb_x_nat_t_port);
833 skb = alloc_skb(size + 16, GFP_ATOMIC);
835 return ERR_PTR(-ENOBUFS);
837 /* call should fill header later */
838 hdr = skb_put(skb, sizeof(struct sadb_msg));
839 memset(hdr, 0, size); /* XXX do we need this ? */
840 hdr->sadb_msg_len = size / sizeof(uint64_t);
843 sa = skb_put(skb, sizeof(struct sadb_sa));
844 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
845 sa->sadb_sa_exttype = SADB_EXT_SA;
846 sa->sadb_sa_spi = x->id.spi;
847 sa->sadb_sa_replay = x->props.replay_window;
848 switch (x->km.state) {
849 case XFRM_STATE_VALID:
850 sa->sadb_sa_state = x->km.dying ?
851 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
854 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
857 sa->sadb_sa_state = SADB_SASTATE_DEAD;
860 sa->sadb_sa_auth = 0;
862 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
863 sa->sadb_sa_auth = (a && a->pfkey_supported) ?
864 a->desc.sadb_alg_id : 0;
866 sa->sadb_sa_encrypt = 0;
867 BUG_ON(x->ealg && x->calg);
869 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
870 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
871 a->desc.sadb_alg_id : 0;
873 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
875 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
876 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
877 a->desc.sadb_alg_id : 0;
880 sa->sadb_sa_flags = 0;
881 if (x->props.flags & XFRM_STATE_NOECN)
882 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
883 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
884 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
885 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
886 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
890 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
891 lifetime->sadb_lifetime_len =
892 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
893 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
894 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
895 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
896 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
897 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
901 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
902 lifetime->sadb_lifetime_len =
903 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
904 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
905 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
906 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
907 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
908 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
911 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
912 lifetime->sadb_lifetime_len =
913 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
914 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
915 lifetime->sadb_lifetime_allocations = x->curlft.packets;
916 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
917 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
918 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
920 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
921 addr->sadb_address_len =
922 (sizeof(struct sadb_address)+sockaddr_size)/
924 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
925 /* "if the ports are non-zero, then the sadb_address_proto field,
926 normally zero, MUST be filled in with the transport
927 protocol's number." - RFC2367 */
928 addr->sadb_address_proto = 0;
929 addr->sadb_address_reserved = 0;
931 addr->sadb_address_prefixlen =
932 pfkey_sockaddr_fill(&x->props.saddr, 0,
933 (struct sockaddr *) (addr + 1),
935 if (!addr->sadb_address_prefixlen)
939 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
940 addr->sadb_address_len =
941 (sizeof(struct sadb_address)+sockaddr_size)/
943 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
944 addr->sadb_address_proto = 0;
945 addr->sadb_address_reserved = 0;
947 addr->sadb_address_prefixlen =
948 pfkey_sockaddr_fill(&x->id.daddr, 0,
949 (struct sockaddr *) (addr + 1),
951 if (!addr->sadb_address_prefixlen)
954 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr,
957 sizeof(struct sadb_address) + sockaddr_size);
958 addr->sadb_address_len =
959 (sizeof(struct sadb_address)+sockaddr_size)/
961 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
962 addr->sadb_address_proto =
963 pfkey_proto_from_xfrm(x->sel.proto);
964 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
965 addr->sadb_address_reserved = 0;
967 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
968 (struct sockaddr *) (addr + 1),
973 if (add_keys && auth_key_size) {
974 key = skb_put(skb, sizeof(struct sadb_key) + auth_key_size);
975 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
977 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
978 key->sadb_key_bits = x->aalg->alg_key_len;
979 key->sadb_key_reserved = 0;
980 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
983 if (add_keys && encrypt_key_size) {
984 key = skb_put(skb, sizeof(struct sadb_key) + encrypt_key_size);
985 key->sadb_key_len = (sizeof(struct sadb_key) +
986 encrypt_key_size) / sizeof(uint64_t);
987 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
988 key->sadb_key_bits = x->ealg->alg_key_len;
989 key->sadb_key_reserved = 0;
990 memcpy(key + 1, x->ealg->alg_key,
991 (x->ealg->alg_key_len+7)/8);
995 sa2 = skb_put(skb, sizeof(struct sadb_x_sa2));
996 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
997 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
998 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
1000 return ERR_PTR(-EINVAL);
1002 sa2->sadb_x_sa2_mode = mode;
1003 sa2->sadb_x_sa2_reserved1 = 0;
1004 sa2->sadb_x_sa2_reserved2 = 0;
1005 sa2->sadb_x_sa2_sequence = 0;
1006 sa2->sadb_x_sa2_reqid = x->props.reqid;
1008 if (natt && natt->encap_type) {
1009 struct sadb_x_nat_t_type *n_type;
1010 struct sadb_x_nat_t_port *n_port;
1013 n_type = skb_put(skb, sizeof(*n_type));
1014 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
1015 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
1016 n_type->sadb_x_nat_t_type_type = natt->encap_type;
1017 n_type->sadb_x_nat_t_type_reserved[0] = 0;
1018 n_type->sadb_x_nat_t_type_reserved[1] = 0;
1019 n_type->sadb_x_nat_t_type_reserved[2] = 0;
1022 n_port = skb_put(skb, sizeof(*n_port));
1023 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1024 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
1025 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
1026 n_port->sadb_x_nat_t_port_reserved = 0;
1029 n_port = skb_put(skb, sizeof(*n_port));
1030 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1031 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
1032 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
1033 n_port->sadb_x_nat_t_port_reserved = 0;
1036 /* security context */
1038 sec_ctx = skb_put(skb,
1039 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1040 sec_ctx->sadb_x_sec_len =
1041 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1042 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1043 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1044 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1045 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1046 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1054 static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x)
1056 struct sk_buff *skb;
1058 skb = __pfkey_xfrm_state2msg(x, 1, 3);
1063 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x,
1066 return __pfkey_xfrm_state2msg(x, 0, hsc);
1069 static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
1070 const struct sadb_msg *hdr,
1071 void * const *ext_hdrs)
1073 struct xfrm_state *x;
1074 const struct sadb_lifetime *lifetime;
1075 const struct sadb_sa *sa;
1076 const struct sadb_key *key;
1077 const struct sadb_x_sec_ctx *sec_ctx;
1082 sa = ext_hdrs[SADB_EXT_SA - 1];
1084 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1085 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1086 return ERR_PTR(-EINVAL);
1087 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1088 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1089 return ERR_PTR(-EINVAL);
1090 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1091 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1092 return ERR_PTR(-EINVAL);
1093 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1094 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1095 return ERR_PTR(-EINVAL);
1097 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1099 return ERR_PTR(-EINVAL);
1101 /* default error is no buffer space */
1106 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1107 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1108 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1109 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1110 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1113 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1114 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1116 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1117 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1118 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1119 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1120 return ERR_PTR(-EINVAL);
1121 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1123 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1124 key->sadb_key_bits == 0)
1125 return ERR_PTR(-EINVAL);
1126 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1128 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1129 key->sadb_key_bits == 0)
1130 return ERR_PTR(-EINVAL);
1132 x = xfrm_state_alloc(net);
1134 return ERR_PTR(-ENOBUFS);
1136 x->id.proto = proto;
1137 x->id.spi = sa->sadb_sa_spi;
1138 x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay,
1139 (sizeof(x->replay.bitmap) * 8));
1140 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1141 x->props.flags |= XFRM_STATE_NOECN;
1142 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1143 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1144 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1145 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1147 lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1];
1148 if (lifetime != NULL) {
1149 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1150 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1151 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1152 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1154 lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1];
1155 if (lifetime != NULL) {
1156 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1157 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1158 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1159 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1162 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
1163 if (sec_ctx != NULL) {
1164 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
1169 err = security_xfrm_state_alloc(x, uctx);
1177 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1178 if (sa->sadb_sa_auth) {
1180 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1181 if (!a || !a->pfkey_supported) {
1186 keysize = (key->sadb_key_bits + 7) / 8;
1187 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1192 strcpy(x->aalg->alg_name, a->name);
1193 x->aalg->alg_key_len = 0;
1195 x->aalg->alg_key_len = key->sadb_key_bits;
1196 memcpy(x->aalg->alg_key, key+1, keysize);
1198 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1199 x->props.aalgo = sa->sadb_sa_auth;
1200 /* x->algo.flags = sa->sadb_sa_flags; */
1202 if (sa->sadb_sa_encrypt) {
1203 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1204 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1205 if (!a || !a->pfkey_supported) {
1209 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1214 strcpy(x->calg->alg_name, a->name);
1215 x->props.calgo = sa->sadb_sa_encrypt;
1218 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1219 if (!a || !a->pfkey_supported) {
1223 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1225 keysize = (key->sadb_key_bits + 7) / 8;
1226 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1231 strcpy(x->ealg->alg_name, a->name);
1232 x->ealg->alg_key_len = 0;
1234 x->ealg->alg_key_len = key->sadb_key_bits;
1235 memcpy(x->ealg->alg_key, key+1, keysize);
1237 x->props.ealgo = sa->sadb_sa_encrypt;
1238 x->geniv = a->uinfo.encr.geniv;
1241 /* x->algo.flags = sa->sadb_sa_flags; */
1243 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1245 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1248 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1249 const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
1250 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1255 x->props.mode = mode;
1256 x->props.reqid = sa2->sadb_x_sa2_reqid;
1259 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1260 const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1262 /* Nobody uses this, but we try. */
1263 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1264 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1268 x->sel.family = x->props.family;
1270 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1271 const struct sadb_x_nat_t_type* n_type;
1272 struct xfrm_encap_tmpl *natt;
1274 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1281 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1282 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1284 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1285 const struct sadb_x_nat_t_port *n_port =
1286 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1287 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1289 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1290 const struct sadb_x_nat_t_port *n_port =
1291 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1292 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1294 memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
1297 err = xfrm_init_state(x);
1301 x->km.seq = hdr->sadb_msg_seq;
1305 x->km.state = XFRM_STATE_DEAD;
1307 return ERR_PTR(err);
1310 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1315 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1317 struct net *net = sock_net(sk);
1318 struct sk_buff *resp_skb;
1319 struct sadb_x_sa2 *sa2;
1320 struct sadb_address *saddr, *daddr;
1321 struct sadb_msg *out_hdr;
1322 struct sadb_spirange *range;
1323 struct xfrm_state *x = NULL;
1326 u32 min_spi, max_spi;
1329 unsigned short family;
1330 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1332 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1333 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1336 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1340 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1341 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1344 reqid = sa2->sadb_x_sa2_reqid;
1350 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1351 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1353 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1356 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1357 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1359 #if IS_ENABLED(CONFIG_IPV6)
1361 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1362 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1367 if (hdr->sadb_msg_seq) {
1368 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1369 if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) {
1376 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, 0, proto, xdaddr, xsaddr, 1, family);
1382 max_spi = 0x0fffffff;
1384 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1386 min_spi = range->sadb_spirange_min;
1387 max_spi = range->sadb_spirange_max;
1390 err = verify_spi_info(x->id.proto, min_spi, max_spi);
1396 err = xfrm_alloc_spi(x, min_spi, max_spi);
1397 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1399 if (IS_ERR(resp_skb)) {
1401 return PTR_ERR(resp_skb);
1404 out_hdr = (struct sadb_msg *) resp_skb->data;
1405 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1406 out_hdr->sadb_msg_type = SADB_GETSPI;
1407 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1408 out_hdr->sadb_msg_errno = 0;
1409 out_hdr->sadb_msg_reserved = 0;
1410 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1411 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1415 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
1420 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1422 struct net *net = sock_net(sk);
1423 struct xfrm_state *x;
1425 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1428 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1431 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1435 spin_lock_bh(&x->lock);
1436 if (x->km.state == XFRM_STATE_ACQ)
1437 x->km.state = XFRM_STATE_ERROR;
1439 spin_unlock_bh(&x->lock);
1444 static inline int event2poltype(int event)
1447 case XFRM_MSG_DELPOLICY:
1448 return SADB_X_SPDDELETE;
1449 case XFRM_MSG_NEWPOLICY:
1450 return SADB_X_SPDADD;
1451 case XFRM_MSG_UPDPOLICY:
1452 return SADB_X_SPDUPDATE;
1453 case XFRM_MSG_POLEXPIRE:
1454 // return SADB_X_SPDEXPIRE;
1456 pr_err("pfkey: Unknown policy event %d\n", event);
1463 static inline int event2keytype(int event)
1466 case XFRM_MSG_DELSA:
1468 case XFRM_MSG_NEWSA:
1470 case XFRM_MSG_UPDSA:
1472 case XFRM_MSG_EXPIRE:
1475 pr_err("pfkey: Unknown SA event %d\n", event);
1483 static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
1485 struct sk_buff *skb;
1486 struct sadb_msg *hdr;
1488 skb = pfkey_xfrm_state2msg(x);
1491 return PTR_ERR(skb);
1493 hdr = (struct sadb_msg *) skb->data;
1494 hdr->sadb_msg_version = PF_KEY_V2;
1495 hdr->sadb_msg_type = event2keytype(c->event);
1496 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1497 hdr->sadb_msg_errno = 0;
1498 hdr->sadb_msg_reserved = 0;
1499 hdr->sadb_msg_seq = c->seq;
1500 hdr->sadb_msg_pid = c->portid;
1502 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
1507 static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1509 struct net *net = sock_net(sk);
1510 struct xfrm_state *x;
1514 x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1519 if (hdr->sadb_msg_type == SADB_ADD)
1520 err = xfrm_state_add(x);
1522 err = xfrm_state_update(x);
1524 xfrm_audit_state_add(x, err ? 0 : 1, true);
1527 x->km.state = XFRM_STATE_DEAD;
1528 __xfrm_state_put(x);
1532 if (hdr->sadb_msg_type == SADB_ADD)
1533 c.event = XFRM_MSG_NEWSA;
1535 c.event = XFRM_MSG_UPDSA;
1536 c.seq = hdr->sadb_msg_seq;
1537 c.portid = hdr->sadb_msg_pid;
1538 km_state_notify(x, &c);
1544 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1546 struct net *net = sock_net(sk);
1547 struct xfrm_state *x;
1551 if (!ext_hdrs[SADB_EXT_SA-1] ||
1552 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1553 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1556 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1560 if ((err = security_xfrm_state_delete(x)))
1563 if (xfrm_state_kern(x)) {
1568 err = xfrm_state_delete(x);
1573 c.seq = hdr->sadb_msg_seq;
1574 c.portid = hdr->sadb_msg_pid;
1575 c.event = XFRM_MSG_DELSA;
1576 km_state_notify(x, &c);
1578 xfrm_audit_state_delete(x, err ? 0 : 1, true);
1584 static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1586 struct net *net = sock_net(sk);
1588 struct sk_buff *out_skb;
1589 struct sadb_msg *out_hdr;
1590 struct xfrm_state *x;
1592 if (!ext_hdrs[SADB_EXT_SA-1] ||
1593 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1594 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1597 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1601 out_skb = pfkey_xfrm_state2msg(x);
1602 proto = x->id.proto;
1604 if (IS_ERR(out_skb))
1605 return PTR_ERR(out_skb);
1607 out_hdr = (struct sadb_msg *) out_skb->data;
1608 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1609 out_hdr->sadb_msg_type = SADB_GET;
1610 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1611 out_hdr->sadb_msg_errno = 0;
1612 out_hdr->sadb_msg_reserved = 0;
1613 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1614 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1615 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1620 static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
1623 struct sk_buff *skb;
1624 struct sadb_msg *hdr;
1625 int len, auth_len, enc_len, i;
1627 auth_len = xfrm_count_pfkey_auth_supported();
1629 auth_len *= sizeof(struct sadb_alg);
1630 auth_len += sizeof(struct sadb_supported);
1633 enc_len = xfrm_count_pfkey_enc_supported();
1635 enc_len *= sizeof(struct sadb_alg);
1636 enc_len += sizeof(struct sadb_supported);
1639 len = enc_len + auth_len + sizeof(struct sadb_msg);
1641 skb = alloc_skb(len + 16, allocation);
1645 hdr = skb_put(skb, sizeof(*hdr));
1646 pfkey_hdr_dup(hdr, orig);
1647 hdr->sadb_msg_errno = 0;
1648 hdr->sadb_msg_len = len / sizeof(uint64_t);
1651 struct sadb_supported *sp;
1652 struct sadb_alg *ap;
1654 sp = skb_put(skb, auth_len);
1655 ap = (struct sadb_alg *) (sp + 1);
1657 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1658 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1660 for (i = 0; ; i++) {
1661 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1664 if (!aalg->pfkey_supported)
1666 if (aalg->available)
1672 struct sadb_supported *sp;
1673 struct sadb_alg *ap;
1675 sp = skb_put(skb, enc_len);
1676 ap = (struct sadb_alg *) (sp + 1);
1678 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1679 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1681 for (i = 0; ; i++) {
1682 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1685 if (!ealg->pfkey_supported)
1687 if (ealg->available)
1696 static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1698 struct pfkey_sock *pfk = pfkey_sk(sk);
1699 struct sk_buff *supp_skb;
1701 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1704 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1705 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1707 pfk->registered |= (1<<hdr->sadb_msg_satype);
1710 mutex_lock(&pfkey_mutex);
1713 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL | __GFP_ZERO);
1714 mutex_unlock(&pfkey_mutex);
1717 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1718 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1723 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk,
1728 static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
1730 struct sk_buff *skb;
1731 struct sadb_msg *hdr;
1733 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1737 hdr = skb_put_data(skb, ihdr, sizeof(struct sadb_msg));
1738 hdr->sadb_msg_errno = (uint8_t) 0;
1739 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1741 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk,
1745 static int key_notify_sa_flush(const struct km_event *c)
1747 struct sk_buff *skb;
1748 struct sadb_msg *hdr;
1750 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1753 hdr = skb_put(skb, sizeof(struct sadb_msg));
1754 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1755 hdr->sadb_msg_type = SADB_FLUSH;
1756 hdr->sadb_msg_seq = c->seq;
1757 hdr->sadb_msg_pid = c->portid;
1758 hdr->sadb_msg_version = PF_KEY_V2;
1759 hdr->sadb_msg_errno = (uint8_t) 0;
1760 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1761 hdr->sadb_msg_reserved = 0;
1763 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
1768 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1770 struct net *net = sock_net(sk);
1775 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1779 err = xfrm_state_flush(net, proto, true, false);
1780 err2 = unicast_flush_resp(sk, hdr);
1782 if (err == -ESRCH) /* empty table - go quietly */
1784 return err ? err : err2;
1787 c.data.proto = proto;
1788 c.seq = hdr->sadb_msg_seq;
1789 c.portid = hdr->sadb_msg_pid;
1790 c.event = XFRM_MSG_FLUSHSA;
1792 km_state_notify(NULL, &c);
1797 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1799 struct pfkey_sock *pfk = ptr;
1800 struct sk_buff *out_skb;
1801 struct sadb_msg *out_hdr;
1803 if (!pfkey_can_dump(&pfk->sk))
1806 out_skb = pfkey_xfrm_state2msg(x);
1807 if (IS_ERR(out_skb))
1808 return PTR_ERR(out_skb);
1810 out_hdr = (struct sadb_msg *) out_skb->data;
1811 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1812 out_hdr->sadb_msg_type = SADB_DUMP;
1813 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1814 out_hdr->sadb_msg_errno = 0;
1815 out_hdr->sadb_msg_reserved = 0;
1816 out_hdr->sadb_msg_seq = count + 1;
1817 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
1820 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
1821 &pfk->sk, sock_net(&pfk->sk));
1822 pfk->dump.skb = out_skb;
1827 static int pfkey_dump_sa(struct pfkey_sock *pfk)
1829 struct net *net = sock_net(&pfk->sk);
1830 return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1833 static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1835 struct net *net = sock_net(&pfk->sk);
1837 xfrm_state_walk_done(&pfk->dump.u.state, net);
1840 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1843 struct xfrm_address_filter *filter = NULL;
1844 struct pfkey_sock *pfk = pfkey_sk(sk);
1846 mutex_lock(&pfk->dump_lock);
1847 if (pfk->dump.dump != NULL) {
1848 mutex_unlock(&pfk->dump_lock);
1852 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1854 mutex_unlock(&pfk->dump_lock);
1858 if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
1859 struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
1861 if ((xfilter->sadb_x_filter_splen >=
1862 (sizeof(xfrm_address_t) << 3)) ||
1863 (xfilter->sadb_x_filter_dplen >=
1864 (sizeof(xfrm_address_t) << 3))) {
1865 mutex_unlock(&pfk->dump_lock);
1868 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
1869 if (filter == NULL) {
1870 mutex_unlock(&pfk->dump_lock);
1874 memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr,
1875 sizeof(xfrm_address_t));
1876 memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr,
1877 sizeof(xfrm_address_t));
1878 filter->family = xfilter->sadb_x_filter_family;
1879 filter->splen = xfilter->sadb_x_filter_splen;
1880 filter->dplen = xfilter->sadb_x_filter_dplen;
1883 pfk->dump.msg_version = hdr->sadb_msg_version;
1884 pfk->dump.msg_portid = hdr->sadb_msg_pid;
1885 pfk->dump.dump = pfkey_dump_sa;
1886 pfk->dump.done = pfkey_dump_sa_done;
1887 xfrm_state_walk_init(&pfk->dump.u.state, proto, filter);
1888 mutex_unlock(&pfk->dump_lock);
1890 return pfkey_do_dump(pfk);
1893 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1895 struct pfkey_sock *pfk = pfkey_sk(sk);
1896 int satype = hdr->sadb_msg_satype;
1897 bool reset_errno = false;
1899 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1901 if (satype != 0 && satype != 1)
1903 pfk->promisc = satype;
1905 if (reset_errno && skb_cloned(skb))
1906 skb = skb_copy(skb, GFP_KERNEL);
1908 skb = skb_clone(skb, GFP_KERNEL);
1910 if (reset_errno && skb) {
1911 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1912 new_hdr->sadb_msg_errno = 0;
1915 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
1919 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1922 u32 reqid = *(u32*)ptr;
1924 for (i=0; i<xp->xfrm_nr; i++) {
1925 if (xp->xfrm_vec[i].reqid == reqid)
1931 static u32 gen_reqid(struct net *net)
1933 struct xfrm_policy_walk walk;
1936 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1942 reqid = IPSEC_MANUAL_REQID_MAX+1;
1943 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1944 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1945 xfrm_policy_walk_done(&walk, net);
1948 } while (reqid != start);
1953 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_policy *pol,
1954 struct sadb_x_ipsecrequest *rq)
1956 struct net *net = xp_net(xp);
1957 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1960 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1963 if (rq->sadb_x_ipsecrequest_mode == 0)
1965 if (!xfrm_id_proto_valid(rq->sadb_x_ipsecrequest_proto))
1968 t->id.proto = rq->sadb_x_ipsecrequest_proto;
1969 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1972 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) {
1973 if ((mode == XFRM_MODE_TUNNEL || mode == XFRM_MODE_BEET) &&
1974 pol->sadb_x_policy_dir == IPSEC_DIR_OUTBOUND)
1977 } else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1978 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1979 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1981 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1985 /* addresses present only in tunnel mode */
1986 if (t->mode == XFRM_MODE_TUNNEL) {
1989 err = parse_sockaddr_pair(
1990 (struct sockaddr *)(rq + 1),
1991 rq->sadb_x_ipsecrequest_len - sizeof(*rq),
1992 &t->saddr, &t->id.daddr, &t->encap_family);
1996 t->encap_family = xp->family;
1998 /* No way to set this via kame pfkey */
2005 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
2008 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
2009 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
2011 if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
2014 while (len >= sizeof(*rq)) {
2015 if (len < rq->sadb_x_ipsecrequest_len ||
2016 rq->sadb_x_ipsecrequest_len < sizeof(*rq))
2019 if ((err = parse_ipsecrequest(xp, pol, rq)) < 0)
2021 len -= rq->sadb_x_ipsecrequest_len;
2022 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
2027 static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
2029 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
2032 int len = sizeof(struct sadb_x_sec_ctx);
2033 len += xfrm_ctx->ctx_len;
2034 return PFKEY_ALIGN8(len);
2039 static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
2041 const struct xfrm_tmpl *t;
2042 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2046 for (i=0; i<xp->xfrm_nr; i++) {
2047 t = xp->xfrm_vec + i;
2048 socklen += pfkey_sockaddr_len(t->encap_family);
2051 return sizeof(struct sadb_msg) +
2052 (sizeof(struct sadb_lifetime) * 3) +
2053 (sizeof(struct sadb_address) * 2) +
2054 (sockaddr_size * 2) +
2055 sizeof(struct sadb_x_policy) +
2056 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
2058 pfkey_xfrm_policy2sec_ctx_size(xp);
2061 static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
2063 struct sk_buff *skb;
2066 size = pfkey_xfrm_policy2msg_size(xp);
2068 skb = alloc_skb(size + 16, GFP_ATOMIC);
2070 return ERR_PTR(-ENOBUFS);
2075 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
2077 struct sadb_msg *hdr;
2078 struct sadb_address *addr;
2079 struct sadb_lifetime *lifetime;
2080 struct sadb_x_policy *pol;
2081 struct sadb_x_sec_ctx *sec_ctx;
2082 struct xfrm_sec_ctx *xfrm_ctx;
2085 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2086 int socklen = pfkey_sockaddr_len(xp->family);
2088 size = pfkey_xfrm_policy2msg_size(xp);
2090 /* call should fill header later */
2091 hdr = skb_put(skb, sizeof(struct sadb_msg));
2092 memset(hdr, 0, size); /* XXX do we need this ? */
2095 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
2096 addr->sadb_address_len =
2097 (sizeof(struct sadb_address)+sockaddr_size)/
2099 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2100 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2101 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2102 addr->sadb_address_reserved = 0;
2103 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2105 (struct sockaddr *) (addr + 1),
2110 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
2111 addr->sadb_address_len =
2112 (sizeof(struct sadb_address)+sockaddr_size)/
2114 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2115 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2116 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2117 addr->sadb_address_reserved = 0;
2119 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2120 (struct sockaddr *) (addr + 1),
2124 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2125 lifetime->sadb_lifetime_len =
2126 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2127 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2128 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2129 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2130 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2131 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2133 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2134 lifetime->sadb_lifetime_len =
2135 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2136 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2137 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2138 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2139 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2140 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2142 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2143 lifetime->sadb_lifetime_len =
2144 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2145 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2146 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2147 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2148 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2149 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2151 pol = skb_put(skb, sizeof(struct sadb_x_policy));
2152 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2153 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2154 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2155 if (xp->action == XFRM_POLICY_ALLOW) {
2157 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2159 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2161 pol->sadb_x_policy_dir = dir+1;
2162 pol->sadb_x_policy_reserved = 0;
2163 pol->sadb_x_policy_id = xp->index;
2164 pol->sadb_x_policy_priority = xp->priority;
2166 for (i=0; i<xp->xfrm_nr; i++) {
2167 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
2168 struct sadb_x_ipsecrequest *rq;
2172 req_size = sizeof(struct sadb_x_ipsecrequest);
2173 if (t->mode == XFRM_MODE_TUNNEL) {
2174 socklen = pfkey_sockaddr_len(t->encap_family);
2175 req_size += socklen * 2;
2179 rq = skb_put(skb, req_size);
2180 pol->sadb_x_policy_len += req_size/8;
2181 memset(rq, 0, sizeof(*rq));
2182 rq->sadb_x_ipsecrequest_len = req_size;
2183 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2184 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2186 rq->sadb_x_ipsecrequest_mode = mode;
2187 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2189 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2191 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2192 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2194 if (t->mode == XFRM_MODE_TUNNEL) {
2195 u8 *sa = (void *)(rq + 1);
2196 pfkey_sockaddr_fill(&t->saddr, 0,
2197 (struct sockaddr *)sa,
2199 pfkey_sockaddr_fill(&t->id.daddr, 0,
2200 (struct sockaddr *) (sa + socklen),
2205 /* security context */
2206 if ((xfrm_ctx = xp->security)) {
2207 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2209 sec_ctx = skb_put(skb, ctx_size);
2210 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2211 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2212 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2213 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2214 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2215 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2219 hdr->sadb_msg_len = size / sizeof(uint64_t);
2220 hdr->sadb_msg_reserved = refcount_read(&xp->refcnt);
2225 static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2227 struct sk_buff *out_skb;
2228 struct sadb_msg *out_hdr;
2231 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2232 if (IS_ERR(out_skb))
2233 return PTR_ERR(out_skb);
2235 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2241 out_hdr = (struct sadb_msg *) out_skb->data;
2242 out_hdr->sadb_msg_version = PF_KEY_V2;
2244 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2245 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2247 out_hdr->sadb_msg_type = event2poltype(c->event);
2248 out_hdr->sadb_msg_errno = 0;
2249 out_hdr->sadb_msg_seq = c->seq;
2250 out_hdr->sadb_msg_pid = c->portid;
2251 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
2256 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2258 struct net *net = sock_net(sk);
2260 struct sadb_lifetime *lifetime;
2261 struct sadb_address *sa;
2262 struct sadb_x_policy *pol;
2263 struct xfrm_policy *xp;
2265 struct sadb_x_sec_ctx *sec_ctx;
2267 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2268 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2269 !ext_hdrs[SADB_X_EXT_POLICY-1])
2272 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2273 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2275 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2278 xp = xfrm_policy_alloc(net, GFP_KERNEL);
2282 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2283 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2284 xp->priority = pol->sadb_x_policy_priority;
2286 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2287 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2288 xp->selector.family = xp->family;
2289 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2290 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2291 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2292 if (xp->selector.sport)
2293 xp->selector.sport_mask = htons(0xffff);
2295 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2296 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2297 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2299 /* Amusing, we set this twice. KAME apps appear to set same value
2300 * in both addresses.
2302 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2304 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2305 if (xp->selector.dport)
2306 xp->selector.dport_mask = htons(0xffff);
2308 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2309 if (sec_ctx != NULL) {
2310 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2317 err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL);
2324 xp->lft.soft_byte_limit = XFRM_INF;
2325 xp->lft.hard_byte_limit = XFRM_INF;
2326 xp->lft.soft_packet_limit = XFRM_INF;
2327 xp->lft.hard_packet_limit = XFRM_INF;
2328 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2329 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2330 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2331 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2332 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2334 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2335 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2336 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2337 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2338 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2341 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2342 (err = parse_ipsecrequests(xp, pol)) < 0)
2345 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2346 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2348 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
2353 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2354 c.event = XFRM_MSG_UPDPOLICY;
2356 c.event = XFRM_MSG_NEWPOLICY;
2358 c.seq = hdr->sadb_msg_seq;
2359 c.portid = hdr->sadb_msg_pid;
2361 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2367 xfrm_policy_destroy(xp);
2371 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2373 struct net *net = sock_net(sk);
2375 struct sadb_address *sa;
2376 struct sadb_x_policy *pol;
2377 struct xfrm_policy *xp;
2378 struct xfrm_selector sel;
2380 struct sadb_x_sec_ctx *sec_ctx;
2381 struct xfrm_sec_ctx *pol_ctx = NULL;
2383 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2384 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2385 !ext_hdrs[SADB_X_EXT_POLICY-1])
2388 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2389 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2392 memset(&sel, 0, sizeof(sel));
2394 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2395 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2396 sel.prefixlen_s = sa->sadb_address_prefixlen;
2397 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2398 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2400 sel.sport_mask = htons(0xffff);
2402 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2403 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2404 sel.prefixlen_d = sa->sadb_address_prefixlen;
2405 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2406 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2408 sel.dport_mask = htons(0xffff);
2410 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2411 if (sec_ctx != NULL) {
2412 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2417 err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL);
2423 xp = xfrm_policy_bysel_ctx(net, &dummy_mark, 0, XFRM_POLICY_TYPE_MAIN,
2424 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2426 security_xfrm_policy_free(pol_ctx);
2430 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2435 c.seq = hdr->sadb_msg_seq;
2436 c.portid = hdr->sadb_msg_pid;
2438 c.event = XFRM_MSG_DELPOLICY;
2439 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2446 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
2449 struct sk_buff *out_skb;
2450 struct sadb_msg *out_hdr;
2453 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2454 if (IS_ERR(out_skb)) {
2455 err = PTR_ERR(out_skb);
2458 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2464 out_hdr = (struct sadb_msg *) out_skb->data;
2465 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2466 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2467 out_hdr->sadb_msg_satype = 0;
2468 out_hdr->sadb_msg_errno = 0;
2469 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2470 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2471 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
2478 static int pfkey_sockaddr_pair_size(sa_family_t family)
2480 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2483 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2484 xfrm_address_t *saddr, xfrm_address_t *daddr,
2489 if (ext_len < 2 || ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2492 af = pfkey_sockaddr_extract(sa, saddr);
2496 socklen = pfkey_sockaddr_len(af);
2497 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2505 #ifdef CONFIG_NET_KEY_MIGRATE
2506 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2507 struct xfrm_migrate *m)
2510 struct sadb_x_ipsecrequest *rq2;
2513 if (len < sizeof(*rq1) ||
2514 len < rq1->sadb_x_ipsecrequest_len ||
2515 rq1->sadb_x_ipsecrequest_len < sizeof(*rq1))
2519 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2520 rq1->sadb_x_ipsecrequest_len - sizeof(*rq1),
2521 &m->old_saddr, &m->old_daddr,
2526 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2527 len -= rq1->sadb_x_ipsecrequest_len;
2529 if (len <= sizeof(*rq2) ||
2530 len < rq2->sadb_x_ipsecrequest_len ||
2531 rq2->sadb_x_ipsecrequest_len < sizeof(*rq2))
2535 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2536 rq2->sadb_x_ipsecrequest_len - sizeof(*rq2),
2537 &m->new_saddr, &m->new_daddr,
2542 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2543 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2544 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2547 m->proto = rq1->sadb_x_ipsecrequest_proto;
2548 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2551 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2553 return ((int)(rq1->sadb_x_ipsecrequest_len +
2554 rq2->sadb_x_ipsecrequest_len));
2557 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2558 const struct sadb_msg *hdr, void * const *ext_hdrs)
2560 int i, len, ret, err = -EINVAL;
2562 struct sadb_address *sa;
2563 struct sadb_x_kmaddress *kma;
2564 struct sadb_x_policy *pol;
2565 struct sadb_x_ipsecrequest *rq;
2566 struct xfrm_selector sel;
2567 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2568 struct xfrm_kmaddress k;
2569 struct net *net = sock_net(sk);
2571 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2572 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2573 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2578 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2579 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2581 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2587 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2588 k.reserved = kma->sadb_x_kmaddress_reserved;
2589 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2590 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2591 &k.local, &k.remote, &k.family);
2598 dir = pol->sadb_x_policy_dir - 1;
2599 memset(&sel, 0, sizeof(sel));
2601 /* set source address info of selector */
2602 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2603 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2604 sel.prefixlen_s = sa->sadb_address_prefixlen;
2605 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2606 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2608 sel.sport_mask = htons(0xffff);
2610 /* set destination address info of selector */
2611 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
2612 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2613 sel.prefixlen_d = sa->sadb_address_prefixlen;
2614 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2615 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2617 sel.dport_mask = htons(0xffff);
2619 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2621 /* extract ipsecrequests */
2623 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2625 while (len > 0 && i < XFRM_MAX_DEPTH) {
2626 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2631 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2637 if (!i || len > 0) {
2642 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2643 kma ? &k : NULL, net, NULL, 0);
2649 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2650 const struct sadb_msg *hdr, void * const *ext_hdrs)
2652 return -ENOPROTOOPT;
2657 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2659 struct net *net = sock_net(sk);
2661 int err = 0, delete;
2662 struct sadb_x_policy *pol;
2663 struct xfrm_policy *xp;
2666 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2669 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2670 if (dir >= XFRM_POLICY_MAX)
2673 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2674 xp = xfrm_policy_byid(net, &dummy_mark, 0, XFRM_POLICY_TYPE_MAIN,
2675 dir, pol->sadb_x_policy_id, delete, &err);
2680 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2684 c.seq = hdr->sadb_msg_seq;
2685 c.portid = hdr->sadb_msg_pid;
2687 c.event = XFRM_MSG_DELPOLICY;
2688 km_policy_notify(xp, dir, &c);
2690 err = key_pol_get_resp(sk, xp, hdr, dir);
2698 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2700 struct pfkey_sock *pfk = ptr;
2701 struct sk_buff *out_skb;
2702 struct sadb_msg *out_hdr;
2705 if (!pfkey_can_dump(&pfk->sk))
2708 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2709 if (IS_ERR(out_skb))
2710 return PTR_ERR(out_skb);
2712 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2718 out_hdr = (struct sadb_msg *) out_skb->data;
2719 out_hdr->sadb_msg_version = pfk->dump.msg_version;
2720 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2721 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2722 out_hdr->sadb_msg_errno = 0;
2723 out_hdr->sadb_msg_seq = count + 1;
2724 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
2727 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
2728 &pfk->sk, sock_net(&pfk->sk));
2729 pfk->dump.skb = out_skb;
2734 static int pfkey_dump_sp(struct pfkey_sock *pfk)
2736 struct net *net = sock_net(&pfk->sk);
2737 return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2740 static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2742 struct net *net = sock_net((struct sock *)pfk);
2744 xfrm_policy_walk_done(&pfk->dump.u.policy, net);
2747 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2749 struct pfkey_sock *pfk = pfkey_sk(sk);
2751 mutex_lock(&pfk->dump_lock);
2752 if (pfk->dump.dump != NULL) {
2753 mutex_unlock(&pfk->dump_lock);
2757 pfk->dump.msg_version = hdr->sadb_msg_version;
2758 pfk->dump.msg_portid = hdr->sadb_msg_pid;
2759 pfk->dump.dump = pfkey_dump_sp;
2760 pfk->dump.done = pfkey_dump_sp_done;
2761 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2762 mutex_unlock(&pfk->dump_lock);
2764 return pfkey_do_dump(pfk);
2767 static int key_notify_policy_flush(const struct km_event *c)
2769 struct sk_buff *skb_out;
2770 struct sadb_msg *hdr;
2772 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2775 hdr = skb_put(skb_out, sizeof(struct sadb_msg));
2776 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2777 hdr->sadb_msg_seq = c->seq;
2778 hdr->sadb_msg_pid = c->portid;
2779 hdr->sadb_msg_version = PF_KEY_V2;
2780 hdr->sadb_msg_errno = (uint8_t) 0;
2781 hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2782 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2783 hdr->sadb_msg_reserved = 0;
2784 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
2789 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2791 struct net *net = sock_net(sk);
2795 err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, true);
2796 err2 = unicast_flush_resp(sk, hdr);
2798 if (err == -ESRCH) /* empty table - old silent behavior */
2803 c.data.type = XFRM_POLICY_TYPE_MAIN;
2804 c.event = XFRM_MSG_FLUSHPOLICY;
2805 c.portid = hdr->sadb_msg_pid;
2806 c.seq = hdr->sadb_msg_seq;
2808 km_policy_notify(NULL, 0, &c);
2813 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2814 const struct sadb_msg *hdr, void * const *ext_hdrs);
2815 static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2816 [SADB_RESERVED] = pfkey_reserved,
2817 [SADB_GETSPI] = pfkey_getspi,
2818 [SADB_UPDATE] = pfkey_add,
2819 [SADB_ADD] = pfkey_add,
2820 [SADB_DELETE] = pfkey_delete,
2821 [SADB_GET] = pfkey_get,
2822 [SADB_ACQUIRE] = pfkey_acquire,
2823 [SADB_REGISTER] = pfkey_register,
2824 [SADB_EXPIRE] = NULL,
2825 [SADB_FLUSH] = pfkey_flush,
2826 [SADB_DUMP] = pfkey_dump,
2827 [SADB_X_PROMISC] = pfkey_promisc,
2828 [SADB_X_PCHANGE] = NULL,
2829 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2830 [SADB_X_SPDADD] = pfkey_spdadd,
2831 [SADB_X_SPDDELETE] = pfkey_spddelete,
2832 [SADB_X_SPDGET] = pfkey_spdget,
2833 [SADB_X_SPDACQUIRE] = NULL,
2834 [SADB_X_SPDDUMP] = pfkey_spddump,
2835 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2836 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2837 [SADB_X_SPDDELETE2] = pfkey_spdget,
2838 [SADB_X_MIGRATE] = pfkey_migrate,
2841 static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
2843 void *ext_hdrs[SADB_EXT_MAX];
2846 /* Non-zero return value of pfkey_broadcast() does not always signal
2847 * an error and even on an actual error we may still want to process
2848 * the message so rather ignore the return value.
2850 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2851 BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
2853 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2854 err = parse_exthdrs(skb, hdr, ext_hdrs);
2857 if (pfkey_funcs[hdr->sadb_msg_type])
2858 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2863 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2865 struct sadb_msg *hdr = NULL;
2867 if (skb->len < sizeof(*hdr)) {
2870 hdr = (struct sadb_msg *) skb->data;
2871 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2872 hdr->sadb_msg_reserved != 0 ||
2873 (hdr->sadb_msg_type <= SADB_RESERVED ||
2874 hdr->sadb_msg_type > SADB_MAX)) {
2877 } else if (hdr->sadb_msg_len != (skb->len /
2878 sizeof(uint64_t)) ||
2879 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2880 sizeof(uint64_t))) {
2890 static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2891 const struct xfrm_algo_desc *d)
2893 unsigned int id = d->desc.sadb_alg_id;
2895 if (id >= sizeof(t->aalgos) * 8)
2898 return (t->aalgos >> id) & 1;
2901 static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2902 const struct xfrm_algo_desc *d)
2904 unsigned int id = d->desc.sadb_alg_id;
2906 if (id >= sizeof(t->ealgos) * 8)
2909 return (t->ealgos >> id) & 1;
2912 static int count_ah_combs(const struct xfrm_tmpl *t)
2916 for (i = 0; ; i++) {
2917 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2920 if (!aalg->pfkey_supported)
2922 if (aalg_tmpl_set(t, aalg))
2923 sz += sizeof(struct sadb_comb);
2925 return sz + sizeof(struct sadb_prop);
2928 static int count_esp_combs(const struct xfrm_tmpl *t)
2932 for (i = 0; ; i++) {
2933 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2937 if (!ealg->pfkey_supported)
2940 if (!(ealg_tmpl_set(t, ealg)))
2943 for (k = 1; ; k++) {
2944 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2948 if (!aalg->pfkey_supported)
2951 if (aalg_tmpl_set(t, aalg))
2952 sz += sizeof(struct sadb_comb);
2955 return sz + sizeof(struct sadb_prop);
2958 static int dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2960 struct sadb_prop *p;
2964 p = skb_put(skb, sizeof(struct sadb_prop));
2965 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2966 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2967 p->sadb_prop_replay = 32;
2968 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2970 for (i = 0; ; i++) {
2971 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2975 if (!aalg->pfkey_supported)
2978 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2979 struct sadb_comb *c;
2980 c = skb_put_zero(skb, sizeof(struct sadb_comb));
2981 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2982 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2983 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2984 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2985 c->sadb_comb_hard_addtime = 24*60*60;
2986 c->sadb_comb_soft_addtime = 20*60*60;
2987 c->sadb_comb_hard_usetime = 8*60*60;
2988 c->sadb_comb_soft_usetime = 7*60*60;
2993 return sz + sizeof(*p);
2996 static int dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2998 struct sadb_prop *p;
3002 p = skb_put(skb, sizeof(struct sadb_prop));
3003 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
3004 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
3005 p->sadb_prop_replay = 32;
3006 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
3009 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
3013 if (!ealg->pfkey_supported)
3016 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
3019 for (k = 1; ; k++) {
3020 struct sadb_comb *c;
3021 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
3024 if (!aalg->pfkey_supported)
3026 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
3028 c = skb_put(skb, sizeof(struct sadb_comb));
3029 memset(c, 0, sizeof(*c));
3030 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
3031 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
3032 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
3033 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
3034 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
3035 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
3036 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
3037 c->sadb_comb_hard_addtime = 24*60*60;
3038 c->sadb_comb_soft_addtime = 20*60*60;
3039 c->sadb_comb_hard_usetime = 8*60*60;
3040 c->sadb_comb_soft_usetime = 7*60*60;
3045 return sz + sizeof(*p);
3048 static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
3053 static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
3055 struct sk_buff *out_skb;
3056 struct sadb_msg *out_hdr;
3060 hard = c->data.hard;
3066 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
3067 if (IS_ERR(out_skb))
3068 return PTR_ERR(out_skb);
3070 out_hdr = (struct sadb_msg *) out_skb->data;
3071 out_hdr->sadb_msg_version = PF_KEY_V2;
3072 out_hdr->sadb_msg_type = SADB_EXPIRE;
3073 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3074 out_hdr->sadb_msg_errno = 0;
3075 out_hdr->sadb_msg_reserved = 0;
3076 out_hdr->sadb_msg_seq = 0;
3077 out_hdr->sadb_msg_pid = 0;
3079 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3084 static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
3086 struct net *net = x ? xs_net(x) : c->net;
3087 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3089 if (atomic_read(&net_pfkey->socks_nr) == 0)
3093 case XFRM_MSG_EXPIRE:
3094 return key_notify_sa_expire(x, c);
3095 case XFRM_MSG_DELSA:
3096 case XFRM_MSG_NEWSA:
3097 case XFRM_MSG_UPDSA:
3098 return key_notify_sa(x, c);
3099 case XFRM_MSG_FLUSHSA:
3100 return key_notify_sa_flush(c);
3101 case XFRM_MSG_NEWAE: /* not yet supported */
3104 pr_err("pfkey: Unknown SA event %d\n", c->event);
3111 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3113 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3117 case XFRM_MSG_POLEXPIRE:
3118 return key_notify_policy_expire(xp, c);
3119 case XFRM_MSG_DELPOLICY:
3120 case XFRM_MSG_NEWPOLICY:
3121 case XFRM_MSG_UPDPOLICY:
3122 return key_notify_policy(xp, dir, c);
3123 case XFRM_MSG_FLUSHPOLICY:
3124 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3126 return key_notify_policy_flush(c);
3128 pr_err("pfkey: Unknown policy event %d\n", c->event);
3135 static u32 get_acqseq(void)
3138 static atomic_t acqseq;
3141 res = atomic_inc_return(&acqseq);
3146 static bool pfkey_is_alive(const struct km_event *c)
3148 struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id);
3150 bool is_alive = false;
3153 sk_for_each_rcu(sk, &net_pfkey->table) {
3154 if (pfkey_sk(sk)->registered) {
3164 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
3166 struct sk_buff *skb;
3167 struct sadb_msg *hdr;
3168 struct sadb_address *addr;
3169 struct sadb_x_policy *pol;
3172 struct sadb_x_sec_ctx *sec_ctx;
3173 struct xfrm_sec_ctx *xfrm_ctx;
3177 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3181 size = sizeof(struct sadb_msg) +
3182 (sizeof(struct sadb_address) * 2) +
3183 (sockaddr_size * 2) +
3184 sizeof(struct sadb_x_policy);
3186 if (x->id.proto == IPPROTO_AH)
3187 alg_size = count_ah_combs(t);
3188 else if (x->id.proto == IPPROTO_ESP)
3189 alg_size = count_esp_combs(t);
3191 if ((xfrm_ctx = x->security)) {
3192 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3193 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3196 skb = alloc_skb(size + alg_size + 16, GFP_ATOMIC);
3200 hdr = skb_put(skb, sizeof(struct sadb_msg));
3201 hdr->sadb_msg_version = PF_KEY_V2;
3202 hdr->sadb_msg_type = SADB_ACQUIRE;
3203 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3204 hdr->sadb_msg_len = size / sizeof(uint64_t);
3205 hdr->sadb_msg_errno = 0;
3206 hdr->sadb_msg_reserved = 0;
3207 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3208 hdr->sadb_msg_pid = 0;
3211 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3212 addr->sadb_address_len =
3213 (sizeof(struct sadb_address)+sockaddr_size)/
3215 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3216 addr->sadb_address_proto = 0;
3217 addr->sadb_address_reserved = 0;
3218 addr->sadb_address_prefixlen =
3219 pfkey_sockaddr_fill(&x->props.saddr, 0,
3220 (struct sockaddr *) (addr + 1),
3222 if (!addr->sadb_address_prefixlen)
3226 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3227 addr->sadb_address_len =
3228 (sizeof(struct sadb_address)+sockaddr_size)/
3230 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3231 addr->sadb_address_proto = 0;
3232 addr->sadb_address_reserved = 0;
3233 addr->sadb_address_prefixlen =
3234 pfkey_sockaddr_fill(&x->id.daddr, 0,
3235 (struct sockaddr *) (addr + 1),
3237 if (!addr->sadb_address_prefixlen)
3240 pol = skb_put(skb, sizeof(struct sadb_x_policy));
3241 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3242 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3243 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3244 pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
3245 pol->sadb_x_policy_reserved = 0;
3246 pol->sadb_x_policy_id = xp->index;
3247 pol->sadb_x_policy_priority = xp->priority;
3249 /* Set sadb_comb's. */
3251 if (x->id.proto == IPPROTO_AH)
3252 alg_size = dump_ah_combs(skb, t);
3253 else if (x->id.proto == IPPROTO_ESP)
3254 alg_size = dump_esp_combs(skb, t);
3256 hdr->sadb_msg_len += alg_size / 8;
3258 /* security context */
3260 sec_ctx = skb_put(skb,
3261 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3262 sec_ctx->sadb_x_sec_len =
3263 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3264 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3265 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3266 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3267 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3268 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3272 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3276 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3277 u8 *data, int len, int *dir)
3279 struct net *net = sock_net(sk);
3280 struct xfrm_policy *xp;
3281 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3282 struct sadb_x_sec_ctx *sec_ctx;
3284 switch (sk->sk_family) {
3286 if (opt != IP_IPSEC_POLICY) {
3291 #if IS_ENABLED(CONFIG_IPV6)
3293 if (opt != IPV6_IPSEC_POLICY) {
3306 if (len < sizeof(struct sadb_x_policy) ||
3307 pol->sadb_x_policy_len*8 > len ||
3308 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3309 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3312 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3318 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3319 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3321 xp->lft.soft_byte_limit = XFRM_INF;
3322 xp->lft.hard_byte_limit = XFRM_INF;
3323 xp->lft.soft_packet_limit = XFRM_INF;
3324 xp->lft.hard_packet_limit = XFRM_INF;
3325 xp->family = sk->sk_family;
3328 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3329 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3332 /* security context too */
3333 if (len >= (pol->sadb_x_policy_len*8 +
3334 sizeof(struct sadb_x_sec_ctx))) {
3335 char *p = (char *)pol;
3336 struct xfrm_user_sec_ctx *uctx;
3338 p += pol->sadb_x_policy_len*8;
3339 sec_ctx = (struct sadb_x_sec_ctx *)p;
3340 if (len < pol->sadb_x_policy_len*8 +
3341 sec_ctx->sadb_x_sec_len*8) {
3345 if ((*dir = verify_sec_ctx_len(p)))
3347 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC);
3348 *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC);
3355 *dir = pol->sadb_x_policy_dir-1;
3360 xfrm_policy_destroy(xp);
3364 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3366 struct sk_buff *skb;
3367 struct sadb_msg *hdr;
3369 struct sadb_address *addr;
3370 struct sadb_x_nat_t_port *n_port;
3373 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3374 struct xfrm_encap_tmpl *natt = NULL;
3376 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3388 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3390 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3391 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3394 size = sizeof(struct sadb_msg) +
3395 sizeof(struct sadb_sa) +
3396 (sizeof(struct sadb_address) * 2) +
3397 (sockaddr_size * 2) +
3398 (sizeof(struct sadb_x_nat_t_port) * 2);
3400 skb = alloc_skb(size + 16, GFP_ATOMIC);
3404 hdr = skb_put(skb, sizeof(struct sadb_msg));
3405 hdr->sadb_msg_version = PF_KEY_V2;
3406 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3407 hdr->sadb_msg_satype = satype;
3408 hdr->sadb_msg_len = size / sizeof(uint64_t);
3409 hdr->sadb_msg_errno = 0;
3410 hdr->sadb_msg_reserved = 0;
3411 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3412 hdr->sadb_msg_pid = 0;
3415 sa = skb_put(skb, sizeof(struct sadb_sa));
3416 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3417 sa->sadb_sa_exttype = SADB_EXT_SA;
3418 sa->sadb_sa_spi = x->id.spi;
3419 sa->sadb_sa_replay = 0;
3420 sa->sadb_sa_state = 0;
3421 sa->sadb_sa_auth = 0;
3422 sa->sadb_sa_encrypt = 0;
3423 sa->sadb_sa_flags = 0;
3425 /* ADDRESS_SRC (old 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_SRC;
3431 addr->sadb_address_proto = 0;
3432 addr->sadb_address_reserved = 0;
3433 addr->sadb_address_prefixlen =
3434 pfkey_sockaddr_fill(&x->props.saddr, 0,
3435 (struct sockaddr *) (addr + 1),
3437 if (!addr->sadb_address_prefixlen)
3440 /* NAT_T_SPORT (old 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_SPORT;
3444 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3445 n_port->sadb_x_nat_t_port_reserved = 0;
3447 /* ADDRESS_DST (new addr) */
3448 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3449 addr->sadb_address_len =
3450 (sizeof(struct sadb_address)+sockaddr_size)/
3452 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3453 addr->sadb_address_proto = 0;
3454 addr->sadb_address_reserved = 0;
3455 addr->sadb_address_prefixlen =
3456 pfkey_sockaddr_fill(ipaddr, 0,
3457 (struct sockaddr *) (addr + 1),
3459 if (!addr->sadb_address_prefixlen)
3462 /* NAT_T_DPORT (new port) */
3463 n_port = skb_put(skb, sizeof(*n_port));
3464 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3465 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3466 n_port->sadb_x_nat_t_port_port = sport;
3467 n_port->sadb_x_nat_t_port_reserved = 0;
3469 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3473 #ifdef CONFIG_NET_KEY_MIGRATE
3474 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3475 const struct xfrm_selector *sel)
3477 struct sadb_address *addr;
3478 addr = skb_put(skb, sizeof(struct sadb_address) + sasize);
3479 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3480 addr->sadb_address_exttype = type;
3481 addr->sadb_address_proto = sel->proto;
3482 addr->sadb_address_reserved = 0;
3485 case SADB_EXT_ADDRESS_SRC:
3486 addr->sadb_address_prefixlen = sel->prefixlen_s;
3487 pfkey_sockaddr_fill(&sel->saddr, 0,
3488 (struct sockaddr *)(addr + 1),
3491 case SADB_EXT_ADDRESS_DST:
3492 addr->sadb_address_prefixlen = sel->prefixlen_d;
3493 pfkey_sockaddr_fill(&sel->daddr, 0,
3494 (struct sockaddr *)(addr + 1),
3505 static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
3507 struct sadb_x_kmaddress *kma;
3509 int family = k->family;
3510 int socklen = pfkey_sockaddr_len(family);
3513 size_req = (sizeof(struct sadb_x_kmaddress) +
3514 pfkey_sockaddr_pair_size(family));
3516 kma = skb_put_zero(skb, size_req);
3517 kma->sadb_x_kmaddress_len = size_req / 8;
3518 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3519 kma->sadb_x_kmaddress_reserved = k->reserved;
3521 sa = (u8 *)(kma + 1);
3522 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3523 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3529 static int set_ipsecrequest(struct sk_buff *skb,
3530 uint8_t proto, uint8_t mode, int level,
3531 uint32_t reqid, uint8_t family,
3532 const xfrm_address_t *src, const xfrm_address_t *dst)
3534 struct sadb_x_ipsecrequest *rq;
3536 int socklen = pfkey_sockaddr_len(family);
3539 size_req = sizeof(struct sadb_x_ipsecrequest) +
3540 pfkey_sockaddr_pair_size(family);
3542 rq = skb_put_zero(skb, size_req);
3543 rq->sadb_x_ipsecrequest_len = size_req;
3544 rq->sadb_x_ipsecrequest_proto = proto;
3545 rq->sadb_x_ipsecrequest_mode = mode;
3546 rq->sadb_x_ipsecrequest_level = level;
3547 rq->sadb_x_ipsecrequest_reqid = reqid;
3549 sa = (u8 *) (rq + 1);
3550 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3551 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3558 #ifdef CONFIG_NET_KEY_MIGRATE
3559 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3560 const struct xfrm_migrate *m, int num_bundles,
3561 const struct xfrm_kmaddress *k,
3562 const struct xfrm_encap_tmpl *encap)
3568 struct sk_buff *skb;
3569 struct sadb_msg *hdr;
3570 struct sadb_x_policy *pol;
3571 const struct xfrm_migrate *mp;
3573 if (type != XFRM_POLICY_TYPE_MAIN)
3576 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3580 /* addresses for KM */
3581 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3582 pfkey_sockaddr_pair_size(k->family));
3586 sasize_sel = pfkey_sockaddr_size(sel->family);
3589 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3592 size_pol += sizeof(struct sadb_x_policy);
3595 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3596 /* old locator pair */
3597 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3598 pfkey_sockaddr_pair_size(mp->old_family);
3599 /* new locator pair */
3600 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3601 pfkey_sockaddr_pair_size(mp->new_family);
3604 size += sizeof(struct sadb_msg) + size_pol;
3607 skb = alloc_skb(size, GFP_ATOMIC);
3611 hdr = skb_put(skb, sizeof(struct sadb_msg));
3612 hdr->sadb_msg_version = PF_KEY_V2;
3613 hdr->sadb_msg_type = SADB_X_MIGRATE;
3614 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3615 hdr->sadb_msg_len = size / 8;
3616 hdr->sadb_msg_errno = 0;
3617 hdr->sadb_msg_reserved = 0;
3618 hdr->sadb_msg_seq = 0;
3619 hdr->sadb_msg_pid = 0;
3621 /* Addresses to be used by KM for negotiation, if ext is available */
3622 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3626 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3629 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3631 /* policy information */
3632 pol = skb_put(skb, sizeof(struct sadb_x_policy));
3633 pol->sadb_x_policy_len = size_pol / 8;
3634 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3635 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3636 pol->sadb_x_policy_dir = dir + 1;
3637 pol->sadb_x_policy_reserved = 0;
3638 pol->sadb_x_policy_id = 0;
3639 pol->sadb_x_policy_priority = 0;
3641 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3642 /* old ipsecrequest */
3643 int mode = pfkey_mode_from_xfrm(mp->mode);
3646 if (set_ipsecrequest(skb, mp->proto, mode,
3647 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3648 mp->reqid, mp->old_family,
3649 &mp->old_saddr, &mp->old_daddr) < 0)
3652 /* new ipsecrequest */
3653 if (set_ipsecrequest(skb, mp->proto, mode,
3654 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3655 mp->reqid, mp->new_family,
3656 &mp->new_saddr, &mp->new_daddr) < 0)
3660 /* broadcast migrate message to sockets */
3661 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
3670 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3671 const struct xfrm_migrate *m, int num_bundles,
3672 const struct xfrm_kmaddress *k,
3673 const struct xfrm_encap_tmpl *encap)
3675 return -ENOPROTOOPT;
3679 static int pfkey_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
3681 struct sock *sk = sock->sk;
3682 struct sk_buff *skb = NULL;
3683 struct sadb_msg *hdr = NULL;
3685 struct net *net = sock_net(sk);
3688 if (msg->msg_flags & MSG_OOB)
3692 if ((unsigned int)len > sk->sk_sndbuf - 32)
3696 skb = alloc_skb(len, GFP_KERNEL);
3701 if (memcpy_from_msg(skb_put(skb,len), msg, len))
3704 hdr = pfkey_get_base_msg(skb, &err);
3708 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
3709 err = pfkey_process(sk, skb, hdr);
3710 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
3713 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3720 static int pfkey_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
3723 struct sock *sk = sock->sk;
3724 struct pfkey_sock *pfk = pfkey_sk(sk);
3725 struct sk_buff *skb;
3729 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3732 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3738 msg->msg_flags |= MSG_TRUNC;
3742 skb_reset_transport_header(skb);
3743 err = skb_copy_datagram_msg(skb, 0, msg, copied);
3747 sock_recv_ts_and_drops(msg, sk, skb);
3749 err = (flags & MSG_TRUNC) ? skb->len : copied;
3751 if (pfk->dump.dump != NULL &&
3752 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3756 skb_free_datagram(sk, skb);
3761 static const struct proto_ops pfkey_ops = {
3763 .owner = THIS_MODULE,
3764 /* Operations that make no sense on pfkey sockets. */
3765 .bind = sock_no_bind,
3766 .connect = sock_no_connect,
3767 .socketpair = sock_no_socketpair,
3768 .accept = sock_no_accept,
3769 .getname = sock_no_getname,
3770 .ioctl = sock_no_ioctl,
3771 .listen = sock_no_listen,
3772 .shutdown = sock_no_shutdown,
3773 .setsockopt = sock_no_setsockopt,
3774 .getsockopt = sock_no_getsockopt,
3775 .mmap = sock_no_mmap,
3776 .sendpage = sock_no_sendpage,
3778 /* Now the operations that really occur. */
3779 .release = pfkey_release,
3780 .poll = datagram_poll,
3781 .sendmsg = pfkey_sendmsg,
3782 .recvmsg = pfkey_recvmsg,
3785 static const struct net_proto_family pfkey_family_ops = {
3787 .create = pfkey_create,
3788 .owner = THIS_MODULE,
3791 #ifdef CONFIG_PROC_FS
3792 static int pfkey_seq_show(struct seq_file *f, void *v)
3794 struct sock *s = sk_entry(v);
3796 if (v == SEQ_START_TOKEN)
3797 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3799 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
3801 refcount_read(&s->sk_refcnt),
3802 sk_rmem_alloc_get(s),
3803 sk_wmem_alloc_get(s),
3804 from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
3810 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3813 struct net *net = seq_file_net(f);
3814 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3817 return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
3820 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3822 struct net *net = seq_file_net(f);
3823 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3825 return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
3828 static void pfkey_seq_stop(struct seq_file *f, void *v)
3834 static const struct seq_operations pfkey_seq_ops = {
3835 .start = pfkey_seq_start,
3836 .next = pfkey_seq_next,
3837 .stop = pfkey_seq_stop,
3838 .show = pfkey_seq_show,
3841 static int __net_init pfkey_init_proc(struct net *net)
3843 struct proc_dir_entry *e;
3845 e = proc_create_net("pfkey", 0, net->proc_net, &pfkey_seq_ops,
3846 sizeof(struct seq_net_private));
3853 static void __net_exit pfkey_exit_proc(struct net *net)
3855 remove_proc_entry("pfkey", net->proc_net);
3858 static inline int pfkey_init_proc(struct net *net)
3863 static inline void pfkey_exit_proc(struct net *net)
3868 static struct xfrm_mgr pfkeyv2_mgr =
3870 .notify = pfkey_send_notify,
3871 .acquire = pfkey_send_acquire,
3872 .compile_policy = pfkey_compile_policy,
3873 .new_mapping = pfkey_send_new_mapping,
3874 .notify_policy = pfkey_send_policy_notify,
3875 .migrate = pfkey_send_migrate,
3876 .is_alive = pfkey_is_alive,
3879 static int __net_init pfkey_net_init(struct net *net)
3881 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3884 INIT_HLIST_HEAD(&net_pfkey->table);
3885 atomic_set(&net_pfkey->socks_nr, 0);
3887 rv = pfkey_init_proc(net);
3892 static void __net_exit pfkey_net_exit(struct net *net)
3894 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3896 pfkey_exit_proc(net);
3897 WARN_ON(!hlist_empty(&net_pfkey->table));
3900 static struct pernet_operations pfkey_net_ops = {
3901 .init = pfkey_net_init,
3902 .exit = pfkey_net_exit,
3903 .id = &pfkey_net_id,
3904 .size = sizeof(struct netns_pfkey),
3907 static void __exit ipsec_pfkey_exit(void)
3909 xfrm_unregister_km(&pfkeyv2_mgr);
3910 sock_unregister(PF_KEY);
3911 unregister_pernet_subsys(&pfkey_net_ops);
3912 proto_unregister(&key_proto);
3915 static int __init ipsec_pfkey_init(void)
3917 int err = proto_register(&key_proto, 0);
3922 err = register_pernet_subsys(&pfkey_net_ops);
3924 goto out_unregister_key_proto;
3925 err = sock_register(&pfkey_family_ops);
3927 goto out_unregister_pernet;
3928 err = xfrm_register_km(&pfkeyv2_mgr);
3930 goto out_sock_unregister;
3934 out_sock_unregister:
3935 sock_unregister(PF_KEY);
3936 out_unregister_pernet:
3937 unregister_pernet_subsys(&pfkey_net_ops);
3938 out_unregister_key_proto:
3939 proto_unregister(&key_proto);
3943 module_init(ipsec_pfkey_init);
3944 module_exit(ipsec_pfkey_exit);
3945 MODULE_LICENSE("GPL");
3946 MODULE_ALIAS_NETPROTO(PF_KEY);