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);
1712 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL | __GFP_ZERO);
1714 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1715 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1720 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk,
1725 static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
1727 struct sk_buff *skb;
1728 struct sadb_msg *hdr;
1730 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1734 hdr = skb_put_data(skb, ihdr, sizeof(struct sadb_msg));
1735 hdr->sadb_msg_errno = (uint8_t) 0;
1736 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1738 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk,
1742 static int key_notify_sa_flush(const struct km_event *c)
1744 struct sk_buff *skb;
1745 struct sadb_msg *hdr;
1747 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1750 hdr = skb_put(skb, sizeof(struct sadb_msg));
1751 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1752 hdr->sadb_msg_type = SADB_FLUSH;
1753 hdr->sadb_msg_seq = c->seq;
1754 hdr->sadb_msg_pid = c->portid;
1755 hdr->sadb_msg_version = PF_KEY_V2;
1756 hdr->sadb_msg_errno = (uint8_t) 0;
1757 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1758 hdr->sadb_msg_reserved = 0;
1760 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
1765 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1767 struct net *net = sock_net(sk);
1772 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1776 err = xfrm_state_flush(net, proto, true, false);
1777 err2 = unicast_flush_resp(sk, hdr);
1779 if (err == -ESRCH) /* empty table - go quietly */
1781 return err ? err : err2;
1784 c.data.proto = proto;
1785 c.seq = hdr->sadb_msg_seq;
1786 c.portid = hdr->sadb_msg_pid;
1787 c.event = XFRM_MSG_FLUSHSA;
1789 km_state_notify(NULL, &c);
1794 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1796 struct pfkey_sock *pfk = ptr;
1797 struct sk_buff *out_skb;
1798 struct sadb_msg *out_hdr;
1800 if (!pfkey_can_dump(&pfk->sk))
1803 out_skb = pfkey_xfrm_state2msg(x);
1804 if (IS_ERR(out_skb))
1805 return PTR_ERR(out_skb);
1807 out_hdr = (struct sadb_msg *) out_skb->data;
1808 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1809 out_hdr->sadb_msg_type = SADB_DUMP;
1810 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1811 out_hdr->sadb_msg_errno = 0;
1812 out_hdr->sadb_msg_reserved = 0;
1813 out_hdr->sadb_msg_seq = count + 1;
1814 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
1817 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
1818 &pfk->sk, sock_net(&pfk->sk));
1819 pfk->dump.skb = out_skb;
1824 static int pfkey_dump_sa(struct pfkey_sock *pfk)
1826 struct net *net = sock_net(&pfk->sk);
1827 return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1830 static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1832 struct net *net = sock_net(&pfk->sk);
1834 xfrm_state_walk_done(&pfk->dump.u.state, net);
1837 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1840 struct xfrm_address_filter *filter = NULL;
1841 struct pfkey_sock *pfk = pfkey_sk(sk);
1843 mutex_lock(&pfk->dump_lock);
1844 if (pfk->dump.dump != NULL) {
1845 mutex_unlock(&pfk->dump_lock);
1849 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1851 mutex_unlock(&pfk->dump_lock);
1855 if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
1856 struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
1858 if ((xfilter->sadb_x_filter_splen >=
1859 (sizeof(xfrm_address_t) << 3)) ||
1860 (xfilter->sadb_x_filter_dplen >=
1861 (sizeof(xfrm_address_t) << 3))) {
1862 mutex_unlock(&pfk->dump_lock);
1865 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
1866 if (filter == NULL) {
1867 mutex_unlock(&pfk->dump_lock);
1871 memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr,
1872 sizeof(xfrm_address_t));
1873 memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr,
1874 sizeof(xfrm_address_t));
1875 filter->family = xfilter->sadb_x_filter_family;
1876 filter->splen = xfilter->sadb_x_filter_splen;
1877 filter->dplen = xfilter->sadb_x_filter_dplen;
1880 pfk->dump.msg_version = hdr->sadb_msg_version;
1881 pfk->dump.msg_portid = hdr->sadb_msg_pid;
1882 pfk->dump.dump = pfkey_dump_sa;
1883 pfk->dump.done = pfkey_dump_sa_done;
1884 xfrm_state_walk_init(&pfk->dump.u.state, proto, filter);
1885 mutex_unlock(&pfk->dump_lock);
1887 return pfkey_do_dump(pfk);
1890 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1892 struct pfkey_sock *pfk = pfkey_sk(sk);
1893 int satype = hdr->sadb_msg_satype;
1894 bool reset_errno = false;
1896 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1898 if (satype != 0 && satype != 1)
1900 pfk->promisc = satype;
1902 if (reset_errno && skb_cloned(skb))
1903 skb = skb_copy(skb, GFP_KERNEL);
1905 skb = skb_clone(skb, GFP_KERNEL);
1907 if (reset_errno && skb) {
1908 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1909 new_hdr->sadb_msg_errno = 0;
1912 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
1916 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1919 u32 reqid = *(u32*)ptr;
1921 for (i=0; i<xp->xfrm_nr; i++) {
1922 if (xp->xfrm_vec[i].reqid == reqid)
1928 static u32 gen_reqid(struct net *net)
1930 struct xfrm_policy_walk walk;
1933 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1939 reqid = IPSEC_MANUAL_REQID_MAX+1;
1940 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1941 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1942 xfrm_policy_walk_done(&walk, net);
1945 } while (reqid != start);
1950 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1952 struct net *net = xp_net(xp);
1953 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1956 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1959 if (rq->sadb_x_ipsecrequest_mode == 0)
1961 if (!xfrm_id_proto_valid(rq->sadb_x_ipsecrequest_proto))
1964 t->id.proto = rq->sadb_x_ipsecrequest_proto;
1965 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1968 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1970 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1971 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1972 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1974 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1978 /* addresses present only in tunnel mode */
1979 if (t->mode == XFRM_MODE_TUNNEL) {
1982 err = parse_sockaddr_pair(
1983 (struct sockaddr *)(rq + 1),
1984 rq->sadb_x_ipsecrequest_len - sizeof(*rq),
1985 &t->saddr, &t->id.daddr, &t->encap_family);
1989 t->encap_family = xp->family;
1991 /* No way to set this via kame pfkey */
1998 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
2001 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
2002 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
2004 if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
2007 while (len >= sizeof(*rq)) {
2008 if (len < rq->sadb_x_ipsecrequest_len ||
2009 rq->sadb_x_ipsecrequest_len < sizeof(*rq))
2012 if ((err = parse_ipsecrequest(xp, rq)) < 0)
2014 len -= rq->sadb_x_ipsecrequest_len;
2015 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
2020 static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
2022 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
2025 int len = sizeof(struct sadb_x_sec_ctx);
2026 len += xfrm_ctx->ctx_len;
2027 return PFKEY_ALIGN8(len);
2032 static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
2034 const struct xfrm_tmpl *t;
2035 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2039 for (i=0; i<xp->xfrm_nr; i++) {
2040 t = xp->xfrm_vec + i;
2041 socklen += pfkey_sockaddr_len(t->encap_family);
2044 return sizeof(struct sadb_msg) +
2045 (sizeof(struct sadb_lifetime) * 3) +
2046 (sizeof(struct sadb_address) * 2) +
2047 (sockaddr_size * 2) +
2048 sizeof(struct sadb_x_policy) +
2049 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
2051 pfkey_xfrm_policy2sec_ctx_size(xp);
2054 static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
2056 struct sk_buff *skb;
2059 size = pfkey_xfrm_policy2msg_size(xp);
2061 skb = alloc_skb(size + 16, GFP_ATOMIC);
2063 return ERR_PTR(-ENOBUFS);
2068 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
2070 struct sadb_msg *hdr;
2071 struct sadb_address *addr;
2072 struct sadb_lifetime *lifetime;
2073 struct sadb_x_policy *pol;
2074 struct sadb_x_sec_ctx *sec_ctx;
2075 struct xfrm_sec_ctx *xfrm_ctx;
2078 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2079 int socklen = pfkey_sockaddr_len(xp->family);
2081 size = pfkey_xfrm_policy2msg_size(xp);
2083 /* call should fill header later */
2084 hdr = skb_put(skb, sizeof(struct sadb_msg));
2085 memset(hdr, 0, size); /* XXX do we need this ? */
2088 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
2089 addr->sadb_address_len =
2090 (sizeof(struct sadb_address)+sockaddr_size)/
2092 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2093 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2094 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2095 addr->sadb_address_reserved = 0;
2096 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2098 (struct sockaddr *) (addr + 1),
2103 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
2104 addr->sadb_address_len =
2105 (sizeof(struct sadb_address)+sockaddr_size)/
2107 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2108 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2109 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2110 addr->sadb_address_reserved = 0;
2112 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2113 (struct sockaddr *) (addr + 1),
2117 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2118 lifetime->sadb_lifetime_len =
2119 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2120 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2121 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2122 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2123 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2124 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2126 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2127 lifetime->sadb_lifetime_len =
2128 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2129 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2130 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2131 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2132 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2133 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2135 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2136 lifetime->sadb_lifetime_len =
2137 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2138 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2139 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2140 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2141 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2142 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2144 pol = skb_put(skb, sizeof(struct sadb_x_policy));
2145 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2146 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2147 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2148 if (xp->action == XFRM_POLICY_ALLOW) {
2150 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2152 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2154 pol->sadb_x_policy_dir = dir+1;
2155 pol->sadb_x_policy_reserved = 0;
2156 pol->sadb_x_policy_id = xp->index;
2157 pol->sadb_x_policy_priority = xp->priority;
2159 for (i=0; i<xp->xfrm_nr; i++) {
2160 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
2161 struct sadb_x_ipsecrequest *rq;
2165 req_size = sizeof(struct sadb_x_ipsecrequest);
2166 if (t->mode == XFRM_MODE_TUNNEL) {
2167 socklen = pfkey_sockaddr_len(t->encap_family);
2168 req_size += socklen * 2;
2172 rq = skb_put(skb, req_size);
2173 pol->sadb_x_policy_len += req_size/8;
2174 memset(rq, 0, sizeof(*rq));
2175 rq->sadb_x_ipsecrequest_len = req_size;
2176 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2177 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2179 rq->sadb_x_ipsecrequest_mode = mode;
2180 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2182 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2184 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2185 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2187 if (t->mode == XFRM_MODE_TUNNEL) {
2188 u8 *sa = (void *)(rq + 1);
2189 pfkey_sockaddr_fill(&t->saddr, 0,
2190 (struct sockaddr *)sa,
2192 pfkey_sockaddr_fill(&t->id.daddr, 0,
2193 (struct sockaddr *) (sa + socklen),
2198 /* security context */
2199 if ((xfrm_ctx = xp->security)) {
2200 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2202 sec_ctx = skb_put(skb, ctx_size);
2203 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2204 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2205 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2206 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2207 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2208 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2212 hdr->sadb_msg_len = size / sizeof(uint64_t);
2213 hdr->sadb_msg_reserved = refcount_read(&xp->refcnt);
2218 static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2220 struct sk_buff *out_skb;
2221 struct sadb_msg *out_hdr;
2224 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2225 if (IS_ERR(out_skb))
2226 return PTR_ERR(out_skb);
2228 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2234 out_hdr = (struct sadb_msg *) out_skb->data;
2235 out_hdr->sadb_msg_version = PF_KEY_V2;
2237 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2238 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2240 out_hdr->sadb_msg_type = event2poltype(c->event);
2241 out_hdr->sadb_msg_errno = 0;
2242 out_hdr->sadb_msg_seq = c->seq;
2243 out_hdr->sadb_msg_pid = c->portid;
2244 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
2249 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2251 struct net *net = sock_net(sk);
2253 struct sadb_lifetime *lifetime;
2254 struct sadb_address *sa;
2255 struct sadb_x_policy *pol;
2256 struct xfrm_policy *xp;
2258 struct sadb_x_sec_ctx *sec_ctx;
2260 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2261 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2262 !ext_hdrs[SADB_X_EXT_POLICY-1])
2265 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2266 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2268 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2271 xp = xfrm_policy_alloc(net, GFP_KERNEL);
2275 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2276 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2277 xp->priority = pol->sadb_x_policy_priority;
2279 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2280 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2281 xp->selector.family = xp->family;
2282 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2283 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2284 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2285 if (xp->selector.sport)
2286 xp->selector.sport_mask = htons(0xffff);
2288 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2289 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2290 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2292 /* Amusing, we set this twice. KAME apps appear to set same value
2293 * in both addresses.
2295 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2297 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2298 if (xp->selector.dport)
2299 xp->selector.dport_mask = htons(0xffff);
2301 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2302 if (sec_ctx != NULL) {
2303 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2310 err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL);
2317 xp->lft.soft_byte_limit = XFRM_INF;
2318 xp->lft.hard_byte_limit = XFRM_INF;
2319 xp->lft.soft_packet_limit = XFRM_INF;
2320 xp->lft.hard_packet_limit = XFRM_INF;
2321 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2322 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2323 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2324 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2325 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2327 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2328 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2329 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2330 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2331 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2334 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2335 (err = parse_ipsecrequests(xp, pol)) < 0)
2338 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2339 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2341 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
2346 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2347 c.event = XFRM_MSG_UPDPOLICY;
2349 c.event = XFRM_MSG_NEWPOLICY;
2351 c.seq = hdr->sadb_msg_seq;
2352 c.portid = hdr->sadb_msg_pid;
2354 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2360 xfrm_policy_destroy(xp);
2364 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2366 struct net *net = sock_net(sk);
2368 struct sadb_address *sa;
2369 struct sadb_x_policy *pol;
2370 struct xfrm_policy *xp;
2371 struct xfrm_selector sel;
2373 struct sadb_x_sec_ctx *sec_ctx;
2374 struct xfrm_sec_ctx *pol_ctx = NULL;
2376 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2377 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2378 !ext_hdrs[SADB_X_EXT_POLICY-1])
2381 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2382 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2385 memset(&sel, 0, sizeof(sel));
2387 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2388 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2389 sel.prefixlen_s = sa->sadb_address_prefixlen;
2390 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2391 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2393 sel.sport_mask = htons(0xffff);
2395 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2396 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2397 sel.prefixlen_d = sa->sadb_address_prefixlen;
2398 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2399 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2401 sel.dport_mask = htons(0xffff);
2403 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2404 if (sec_ctx != NULL) {
2405 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2410 err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL);
2416 xp = xfrm_policy_bysel_ctx(net, &dummy_mark, 0, XFRM_POLICY_TYPE_MAIN,
2417 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2419 security_xfrm_policy_free(pol_ctx);
2423 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2428 c.seq = hdr->sadb_msg_seq;
2429 c.portid = hdr->sadb_msg_pid;
2431 c.event = XFRM_MSG_DELPOLICY;
2432 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2439 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
2442 struct sk_buff *out_skb;
2443 struct sadb_msg *out_hdr;
2446 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2447 if (IS_ERR(out_skb)) {
2448 err = PTR_ERR(out_skb);
2451 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2457 out_hdr = (struct sadb_msg *) out_skb->data;
2458 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2459 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2460 out_hdr->sadb_msg_satype = 0;
2461 out_hdr->sadb_msg_errno = 0;
2462 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2463 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2464 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
2471 static int pfkey_sockaddr_pair_size(sa_family_t family)
2473 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2476 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2477 xfrm_address_t *saddr, xfrm_address_t *daddr,
2482 if (ext_len < 2 || ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2485 af = pfkey_sockaddr_extract(sa, saddr);
2489 socklen = pfkey_sockaddr_len(af);
2490 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2498 #ifdef CONFIG_NET_KEY_MIGRATE
2499 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2500 struct xfrm_migrate *m)
2503 struct sadb_x_ipsecrequest *rq2;
2506 if (len < sizeof(*rq1) ||
2507 len < rq1->sadb_x_ipsecrequest_len ||
2508 rq1->sadb_x_ipsecrequest_len < sizeof(*rq1))
2512 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2513 rq1->sadb_x_ipsecrequest_len - sizeof(*rq1),
2514 &m->old_saddr, &m->old_daddr,
2519 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2520 len -= rq1->sadb_x_ipsecrequest_len;
2522 if (len <= sizeof(*rq2) ||
2523 len < rq2->sadb_x_ipsecrequest_len ||
2524 rq2->sadb_x_ipsecrequest_len < sizeof(*rq2))
2528 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2529 rq2->sadb_x_ipsecrequest_len - sizeof(*rq2),
2530 &m->new_saddr, &m->new_daddr,
2535 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2536 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2537 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2540 m->proto = rq1->sadb_x_ipsecrequest_proto;
2541 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2544 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2546 return ((int)(rq1->sadb_x_ipsecrequest_len +
2547 rq2->sadb_x_ipsecrequest_len));
2550 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2551 const struct sadb_msg *hdr, void * const *ext_hdrs)
2553 int i, len, ret, err = -EINVAL;
2555 struct sadb_address *sa;
2556 struct sadb_x_kmaddress *kma;
2557 struct sadb_x_policy *pol;
2558 struct sadb_x_ipsecrequest *rq;
2559 struct xfrm_selector sel;
2560 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2561 struct xfrm_kmaddress k;
2562 struct net *net = sock_net(sk);
2564 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2565 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2566 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2571 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2572 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2574 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2580 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2581 k.reserved = kma->sadb_x_kmaddress_reserved;
2582 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2583 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2584 &k.local, &k.remote, &k.family);
2591 dir = pol->sadb_x_policy_dir - 1;
2592 memset(&sel, 0, sizeof(sel));
2594 /* set source address info of selector */
2595 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2596 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2597 sel.prefixlen_s = sa->sadb_address_prefixlen;
2598 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2599 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2601 sel.sport_mask = htons(0xffff);
2603 /* set destination address info of selector */
2604 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
2605 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2606 sel.prefixlen_d = sa->sadb_address_prefixlen;
2607 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2608 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2610 sel.dport_mask = htons(0xffff);
2612 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2614 /* extract ipsecrequests */
2616 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2618 while (len > 0 && i < XFRM_MAX_DEPTH) {
2619 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2624 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2630 if (!i || len > 0) {
2635 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2636 kma ? &k : NULL, net, NULL, 0);
2642 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2643 const struct sadb_msg *hdr, void * const *ext_hdrs)
2645 return -ENOPROTOOPT;
2650 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2652 struct net *net = sock_net(sk);
2654 int err = 0, delete;
2655 struct sadb_x_policy *pol;
2656 struct xfrm_policy *xp;
2659 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2662 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2663 if (dir >= XFRM_POLICY_MAX)
2666 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2667 xp = xfrm_policy_byid(net, &dummy_mark, 0, XFRM_POLICY_TYPE_MAIN,
2668 dir, pol->sadb_x_policy_id, delete, &err);
2673 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2677 c.seq = hdr->sadb_msg_seq;
2678 c.portid = hdr->sadb_msg_pid;
2680 c.event = XFRM_MSG_DELPOLICY;
2681 km_policy_notify(xp, dir, &c);
2683 err = key_pol_get_resp(sk, xp, hdr, dir);
2691 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2693 struct pfkey_sock *pfk = ptr;
2694 struct sk_buff *out_skb;
2695 struct sadb_msg *out_hdr;
2698 if (!pfkey_can_dump(&pfk->sk))
2701 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2702 if (IS_ERR(out_skb))
2703 return PTR_ERR(out_skb);
2705 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2711 out_hdr = (struct sadb_msg *) out_skb->data;
2712 out_hdr->sadb_msg_version = pfk->dump.msg_version;
2713 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2714 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2715 out_hdr->sadb_msg_errno = 0;
2716 out_hdr->sadb_msg_seq = count + 1;
2717 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
2720 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
2721 &pfk->sk, sock_net(&pfk->sk));
2722 pfk->dump.skb = out_skb;
2727 static int pfkey_dump_sp(struct pfkey_sock *pfk)
2729 struct net *net = sock_net(&pfk->sk);
2730 return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2733 static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2735 struct net *net = sock_net((struct sock *)pfk);
2737 xfrm_policy_walk_done(&pfk->dump.u.policy, net);
2740 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2742 struct pfkey_sock *pfk = pfkey_sk(sk);
2744 mutex_lock(&pfk->dump_lock);
2745 if (pfk->dump.dump != NULL) {
2746 mutex_unlock(&pfk->dump_lock);
2750 pfk->dump.msg_version = hdr->sadb_msg_version;
2751 pfk->dump.msg_portid = hdr->sadb_msg_pid;
2752 pfk->dump.dump = pfkey_dump_sp;
2753 pfk->dump.done = pfkey_dump_sp_done;
2754 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2755 mutex_unlock(&pfk->dump_lock);
2757 return pfkey_do_dump(pfk);
2760 static int key_notify_policy_flush(const struct km_event *c)
2762 struct sk_buff *skb_out;
2763 struct sadb_msg *hdr;
2765 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2768 hdr = skb_put(skb_out, sizeof(struct sadb_msg));
2769 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2770 hdr->sadb_msg_seq = c->seq;
2771 hdr->sadb_msg_pid = c->portid;
2772 hdr->sadb_msg_version = PF_KEY_V2;
2773 hdr->sadb_msg_errno = (uint8_t) 0;
2774 hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2775 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2776 hdr->sadb_msg_reserved = 0;
2777 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
2782 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2784 struct net *net = sock_net(sk);
2788 err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, true);
2789 err2 = unicast_flush_resp(sk, hdr);
2791 if (err == -ESRCH) /* empty table - old silent behavior */
2796 c.data.type = XFRM_POLICY_TYPE_MAIN;
2797 c.event = XFRM_MSG_FLUSHPOLICY;
2798 c.portid = hdr->sadb_msg_pid;
2799 c.seq = hdr->sadb_msg_seq;
2801 km_policy_notify(NULL, 0, &c);
2806 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2807 const struct sadb_msg *hdr, void * const *ext_hdrs);
2808 static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2809 [SADB_RESERVED] = pfkey_reserved,
2810 [SADB_GETSPI] = pfkey_getspi,
2811 [SADB_UPDATE] = pfkey_add,
2812 [SADB_ADD] = pfkey_add,
2813 [SADB_DELETE] = pfkey_delete,
2814 [SADB_GET] = pfkey_get,
2815 [SADB_ACQUIRE] = pfkey_acquire,
2816 [SADB_REGISTER] = pfkey_register,
2817 [SADB_EXPIRE] = NULL,
2818 [SADB_FLUSH] = pfkey_flush,
2819 [SADB_DUMP] = pfkey_dump,
2820 [SADB_X_PROMISC] = pfkey_promisc,
2821 [SADB_X_PCHANGE] = NULL,
2822 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2823 [SADB_X_SPDADD] = pfkey_spdadd,
2824 [SADB_X_SPDDELETE] = pfkey_spddelete,
2825 [SADB_X_SPDGET] = pfkey_spdget,
2826 [SADB_X_SPDACQUIRE] = NULL,
2827 [SADB_X_SPDDUMP] = pfkey_spddump,
2828 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2829 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2830 [SADB_X_SPDDELETE2] = pfkey_spdget,
2831 [SADB_X_MIGRATE] = pfkey_migrate,
2834 static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
2836 void *ext_hdrs[SADB_EXT_MAX];
2839 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2840 BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
2842 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2843 err = parse_exthdrs(skb, hdr, ext_hdrs);
2846 if (pfkey_funcs[hdr->sadb_msg_type])
2847 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2852 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2854 struct sadb_msg *hdr = NULL;
2856 if (skb->len < sizeof(*hdr)) {
2859 hdr = (struct sadb_msg *) skb->data;
2860 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2861 hdr->sadb_msg_reserved != 0 ||
2862 (hdr->sadb_msg_type <= SADB_RESERVED ||
2863 hdr->sadb_msg_type > SADB_MAX)) {
2866 } else if (hdr->sadb_msg_len != (skb->len /
2867 sizeof(uint64_t)) ||
2868 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2869 sizeof(uint64_t))) {
2879 static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2880 const struct xfrm_algo_desc *d)
2882 unsigned int id = d->desc.sadb_alg_id;
2884 if (id >= sizeof(t->aalgos) * 8)
2887 return (t->aalgos >> id) & 1;
2890 static inline int ealg_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->ealgos) * 8)
2898 return (t->ealgos >> id) & 1;
2901 static int count_ah_combs(const struct xfrm_tmpl *t)
2905 for (i = 0; ; i++) {
2906 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2909 if (!aalg->pfkey_supported)
2911 if (aalg_tmpl_set(t, aalg))
2912 sz += sizeof(struct sadb_comb);
2914 return sz + sizeof(struct sadb_prop);
2917 static int count_esp_combs(const struct xfrm_tmpl *t)
2921 for (i = 0; ; i++) {
2922 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2926 if (!ealg->pfkey_supported)
2929 if (!(ealg_tmpl_set(t, ealg)))
2932 for (k = 1; ; k++) {
2933 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2937 if (!aalg->pfkey_supported)
2940 if (aalg_tmpl_set(t, aalg))
2941 sz += sizeof(struct sadb_comb);
2944 return sz + sizeof(struct sadb_prop);
2947 static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2949 struct sadb_prop *p;
2952 p = skb_put(skb, sizeof(struct sadb_prop));
2953 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2954 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2955 p->sadb_prop_replay = 32;
2956 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2958 for (i = 0; ; i++) {
2959 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2963 if (!aalg->pfkey_supported)
2966 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2967 struct sadb_comb *c;
2968 c = skb_put_zero(skb, sizeof(struct sadb_comb));
2969 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2970 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2971 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2972 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2973 c->sadb_comb_hard_addtime = 24*60*60;
2974 c->sadb_comb_soft_addtime = 20*60*60;
2975 c->sadb_comb_hard_usetime = 8*60*60;
2976 c->sadb_comb_soft_usetime = 7*60*60;
2981 static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2983 struct sadb_prop *p;
2986 p = skb_put(skb, sizeof(struct sadb_prop));
2987 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2988 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2989 p->sadb_prop_replay = 32;
2990 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2993 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2997 if (!ealg->pfkey_supported)
3000 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
3003 for (k = 1; ; k++) {
3004 struct sadb_comb *c;
3005 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
3008 if (!aalg->pfkey_supported)
3010 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
3012 c = skb_put(skb, sizeof(struct sadb_comb));
3013 memset(c, 0, sizeof(*c));
3014 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
3015 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
3016 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
3017 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
3018 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
3019 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
3020 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
3021 c->sadb_comb_hard_addtime = 24*60*60;
3022 c->sadb_comb_soft_addtime = 20*60*60;
3023 c->sadb_comb_hard_usetime = 8*60*60;
3024 c->sadb_comb_soft_usetime = 7*60*60;
3029 static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
3034 static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
3036 struct sk_buff *out_skb;
3037 struct sadb_msg *out_hdr;
3041 hard = c->data.hard;
3047 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
3048 if (IS_ERR(out_skb))
3049 return PTR_ERR(out_skb);
3051 out_hdr = (struct sadb_msg *) out_skb->data;
3052 out_hdr->sadb_msg_version = PF_KEY_V2;
3053 out_hdr->sadb_msg_type = SADB_EXPIRE;
3054 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3055 out_hdr->sadb_msg_errno = 0;
3056 out_hdr->sadb_msg_reserved = 0;
3057 out_hdr->sadb_msg_seq = 0;
3058 out_hdr->sadb_msg_pid = 0;
3060 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3065 static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
3067 struct net *net = x ? xs_net(x) : c->net;
3068 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3070 if (atomic_read(&net_pfkey->socks_nr) == 0)
3074 case XFRM_MSG_EXPIRE:
3075 return key_notify_sa_expire(x, c);
3076 case XFRM_MSG_DELSA:
3077 case XFRM_MSG_NEWSA:
3078 case XFRM_MSG_UPDSA:
3079 return key_notify_sa(x, c);
3080 case XFRM_MSG_FLUSHSA:
3081 return key_notify_sa_flush(c);
3082 case XFRM_MSG_NEWAE: /* not yet supported */
3085 pr_err("pfkey: Unknown SA event %d\n", c->event);
3092 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3094 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3098 case XFRM_MSG_POLEXPIRE:
3099 return key_notify_policy_expire(xp, c);
3100 case XFRM_MSG_DELPOLICY:
3101 case XFRM_MSG_NEWPOLICY:
3102 case XFRM_MSG_UPDPOLICY:
3103 return key_notify_policy(xp, dir, c);
3104 case XFRM_MSG_FLUSHPOLICY:
3105 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3107 return key_notify_policy_flush(c);
3109 pr_err("pfkey: Unknown policy event %d\n", c->event);
3116 static u32 get_acqseq(void)
3119 static atomic_t acqseq;
3122 res = atomic_inc_return(&acqseq);
3127 static bool pfkey_is_alive(const struct km_event *c)
3129 struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id);
3131 bool is_alive = false;
3134 sk_for_each_rcu(sk, &net_pfkey->table) {
3135 if (pfkey_sk(sk)->registered) {
3145 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
3147 struct sk_buff *skb;
3148 struct sadb_msg *hdr;
3149 struct sadb_address *addr;
3150 struct sadb_x_policy *pol;
3153 struct sadb_x_sec_ctx *sec_ctx;
3154 struct xfrm_sec_ctx *xfrm_ctx;
3157 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3161 size = sizeof(struct sadb_msg) +
3162 (sizeof(struct sadb_address) * 2) +
3163 (sockaddr_size * 2) +
3164 sizeof(struct sadb_x_policy);
3166 if (x->id.proto == IPPROTO_AH)
3167 size += count_ah_combs(t);
3168 else if (x->id.proto == IPPROTO_ESP)
3169 size += count_esp_combs(t);
3171 if ((xfrm_ctx = x->security)) {
3172 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3173 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3176 skb = alloc_skb(size + 16, GFP_ATOMIC);
3180 hdr = skb_put(skb, sizeof(struct sadb_msg));
3181 hdr->sadb_msg_version = PF_KEY_V2;
3182 hdr->sadb_msg_type = SADB_ACQUIRE;
3183 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3184 hdr->sadb_msg_len = size / sizeof(uint64_t);
3185 hdr->sadb_msg_errno = 0;
3186 hdr->sadb_msg_reserved = 0;
3187 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3188 hdr->sadb_msg_pid = 0;
3191 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3192 addr->sadb_address_len =
3193 (sizeof(struct sadb_address)+sockaddr_size)/
3195 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3196 addr->sadb_address_proto = 0;
3197 addr->sadb_address_reserved = 0;
3198 addr->sadb_address_prefixlen =
3199 pfkey_sockaddr_fill(&x->props.saddr, 0,
3200 (struct sockaddr *) (addr + 1),
3202 if (!addr->sadb_address_prefixlen)
3206 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3207 addr->sadb_address_len =
3208 (sizeof(struct sadb_address)+sockaddr_size)/
3210 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3211 addr->sadb_address_proto = 0;
3212 addr->sadb_address_reserved = 0;
3213 addr->sadb_address_prefixlen =
3214 pfkey_sockaddr_fill(&x->id.daddr, 0,
3215 (struct sockaddr *) (addr + 1),
3217 if (!addr->sadb_address_prefixlen)
3220 pol = skb_put(skb, sizeof(struct sadb_x_policy));
3221 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3222 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3223 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3224 pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
3225 pol->sadb_x_policy_reserved = 0;
3226 pol->sadb_x_policy_id = xp->index;
3227 pol->sadb_x_policy_priority = xp->priority;
3229 /* Set sadb_comb's. */
3230 if (x->id.proto == IPPROTO_AH)
3231 dump_ah_combs(skb, t);
3232 else if (x->id.proto == IPPROTO_ESP)
3233 dump_esp_combs(skb, t);
3235 /* security context */
3237 sec_ctx = skb_put(skb,
3238 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3239 sec_ctx->sadb_x_sec_len =
3240 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3241 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3242 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3243 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3244 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3245 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3249 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3253 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3254 u8 *data, int len, int *dir)
3256 struct net *net = sock_net(sk);
3257 struct xfrm_policy *xp;
3258 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3259 struct sadb_x_sec_ctx *sec_ctx;
3261 switch (sk->sk_family) {
3263 if (opt != IP_IPSEC_POLICY) {
3268 #if IS_ENABLED(CONFIG_IPV6)
3270 if (opt != IPV6_IPSEC_POLICY) {
3283 if (len < sizeof(struct sadb_x_policy) ||
3284 pol->sadb_x_policy_len*8 > len ||
3285 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3286 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3289 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3295 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3296 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3298 xp->lft.soft_byte_limit = XFRM_INF;
3299 xp->lft.hard_byte_limit = XFRM_INF;
3300 xp->lft.soft_packet_limit = XFRM_INF;
3301 xp->lft.hard_packet_limit = XFRM_INF;
3302 xp->family = sk->sk_family;
3305 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3306 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3309 /* security context too */
3310 if (len >= (pol->sadb_x_policy_len*8 +
3311 sizeof(struct sadb_x_sec_ctx))) {
3312 char *p = (char *)pol;
3313 struct xfrm_user_sec_ctx *uctx;
3315 p += pol->sadb_x_policy_len*8;
3316 sec_ctx = (struct sadb_x_sec_ctx *)p;
3317 if (len < pol->sadb_x_policy_len*8 +
3318 sec_ctx->sadb_x_sec_len*8) {
3322 if ((*dir = verify_sec_ctx_len(p)))
3324 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC);
3325 *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC);
3332 *dir = pol->sadb_x_policy_dir-1;
3337 xfrm_policy_destroy(xp);
3341 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3343 struct sk_buff *skb;
3344 struct sadb_msg *hdr;
3346 struct sadb_address *addr;
3347 struct sadb_x_nat_t_port *n_port;
3350 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3351 struct xfrm_encap_tmpl *natt = NULL;
3353 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3365 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3367 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3368 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3371 size = sizeof(struct sadb_msg) +
3372 sizeof(struct sadb_sa) +
3373 (sizeof(struct sadb_address) * 2) +
3374 (sockaddr_size * 2) +
3375 (sizeof(struct sadb_x_nat_t_port) * 2);
3377 skb = alloc_skb(size + 16, GFP_ATOMIC);
3381 hdr = skb_put(skb, sizeof(struct sadb_msg));
3382 hdr->sadb_msg_version = PF_KEY_V2;
3383 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3384 hdr->sadb_msg_satype = satype;
3385 hdr->sadb_msg_len = size / sizeof(uint64_t);
3386 hdr->sadb_msg_errno = 0;
3387 hdr->sadb_msg_reserved = 0;
3388 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3389 hdr->sadb_msg_pid = 0;
3392 sa = skb_put(skb, sizeof(struct sadb_sa));
3393 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3394 sa->sadb_sa_exttype = SADB_EXT_SA;
3395 sa->sadb_sa_spi = x->id.spi;
3396 sa->sadb_sa_replay = 0;
3397 sa->sadb_sa_state = 0;
3398 sa->sadb_sa_auth = 0;
3399 sa->sadb_sa_encrypt = 0;
3400 sa->sadb_sa_flags = 0;
3402 /* ADDRESS_SRC (old addr) */
3403 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3404 addr->sadb_address_len =
3405 (sizeof(struct sadb_address)+sockaddr_size)/
3407 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3408 addr->sadb_address_proto = 0;
3409 addr->sadb_address_reserved = 0;
3410 addr->sadb_address_prefixlen =
3411 pfkey_sockaddr_fill(&x->props.saddr, 0,
3412 (struct sockaddr *) (addr + 1),
3414 if (!addr->sadb_address_prefixlen)
3417 /* NAT_T_SPORT (old port) */
3418 n_port = skb_put(skb, sizeof(*n_port));
3419 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3420 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3421 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3422 n_port->sadb_x_nat_t_port_reserved = 0;
3424 /* ADDRESS_DST (new addr) */
3425 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3426 addr->sadb_address_len =
3427 (sizeof(struct sadb_address)+sockaddr_size)/
3429 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3430 addr->sadb_address_proto = 0;
3431 addr->sadb_address_reserved = 0;
3432 addr->sadb_address_prefixlen =
3433 pfkey_sockaddr_fill(ipaddr, 0,
3434 (struct sockaddr *) (addr + 1),
3436 if (!addr->sadb_address_prefixlen)
3439 /* NAT_T_DPORT (new port) */
3440 n_port = skb_put(skb, sizeof(*n_port));
3441 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3442 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3443 n_port->sadb_x_nat_t_port_port = sport;
3444 n_port->sadb_x_nat_t_port_reserved = 0;
3446 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3450 #ifdef CONFIG_NET_KEY_MIGRATE
3451 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3452 const struct xfrm_selector *sel)
3454 struct sadb_address *addr;
3455 addr = skb_put(skb, sizeof(struct sadb_address) + sasize);
3456 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3457 addr->sadb_address_exttype = type;
3458 addr->sadb_address_proto = sel->proto;
3459 addr->sadb_address_reserved = 0;
3462 case SADB_EXT_ADDRESS_SRC:
3463 addr->sadb_address_prefixlen = sel->prefixlen_s;
3464 pfkey_sockaddr_fill(&sel->saddr, 0,
3465 (struct sockaddr *)(addr + 1),
3468 case SADB_EXT_ADDRESS_DST:
3469 addr->sadb_address_prefixlen = sel->prefixlen_d;
3470 pfkey_sockaddr_fill(&sel->daddr, 0,
3471 (struct sockaddr *)(addr + 1),
3482 static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
3484 struct sadb_x_kmaddress *kma;
3486 int family = k->family;
3487 int socklen = pfkey_sockaddr_len(family);
3490 size_req = (sizeof(struct sadb_x_kmaddress) +
3491 pfkey_sockaddr_pair_size(family));
3493 kma = skb_put_zero(skb, size_req);
3494 kma->sadb_x_kmaddress_len = size_req / 8;
3495 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3496 kma->sadb_x_kmaddress_reserved = k->reserved;
3498 sa = (u8 *)(kma + 1);
3499 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3500 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3506 static int set_ipsecrequest(struct sk_buff *skb,
3507 uint8_t proto, uint8_t mode, int level,
3508 uint32_t reqid, uint8_t family,
3509 const xfrm_address_t *src, const xfrm_address_t *dst)
3511 struct sadb_x_ipsecrequest *rq;
3513 int socklen = pfkey_sockaddr_len(family);
3516 size_req = sizeof(struct sadb_x_ipsecrequest) +
3517 pfkey_sockaddr_pair_size(family);
3519 rq = skb_put_zero(skb, size_req);
3520 rq->sadb_x_ipsecrequest_len = size_req;
3521 rq->sadb_x_ipsecrequest_proto = proto;
3522 rq->sadb_x_ipsecrequest_mode = mode;
3523 rq->sadb_x_ipsecrequest_level = level;
3524 rq->sadb_x_ipsecrequest_reqid = reqid;
3526 sa = (u8 *) (rq + 1);
3527 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3528 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3535 #ifdef CONFIG_NET_KEY_MIGRATE
3536 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3537 const struct xfrm_migrate *m, int num_bundles,
3538 const struct xfrm_kmaddress *k,
3539 const struct xfrm_encap_tmpl *encap)
3545 struct sk_buff *skb;
3546 struct sadb_msg *hdr;
3547 struct sadb_x_policy *pol;
3548 const struct xfrm_migrate *mp;
3550 if (type != XFRM_POLICY_TYPE_MAIN)
3553 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3557 /* addresses for KM */
3558 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3559 pfkey_sockaddr_pair_size(k->family));
3563 sasize_sel = pfkey_sockaddr_size(sel->family);
3566 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3569 size_pol += sizeof(struct sadb_x_policy);
3572 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3573 /* old locator pair */
3574 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3575 pfkey_sockaddr_pair_size(mp->old_family);
3576 /* new locator pair */
3577 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3578 pfkey_sockaddr_pair_size(mp->new_family);
3581 size += sizeof(struct sadb_msg) + size_pol;
3584 skb = alloc_skb(size, GFP_ATOMIC);
3588 hdr = skb_put(skb, sizeof(struct sadb_msg));
3589 hdr->sadb_msg_version = PF_KEY_V2;
3590 hdr->sadb_msg_type = SADB_X_MIGRATE;
3591 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3592 hdr->sadb_msg_len = size / 8;
3593 hdr->sadb_msg_errno = 0;
3594 hdr->sadb_msg_reserved = 0;
3595 hdr->sadb_msg_seq = 0;
3596 hdr->sadb_msg_pid = 0;
3598 /* Addresses to be used by KM for negotiation, if ext is available */
3599 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3603 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3606 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3608 /* policy information */
3609 pol = skb_put(skb, sizeof(struct sadb_x_policy));
3610 pol->sadb_x_policy_len = size_pol / 8;
3611 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3612 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3613 pol->sadb_x_policy_dir = dir + 1;
3614 pol->sadb_x_policy_reserved = 0;
3615 pol->sadb_x_policy_id = 0;
3616 pol->sadb_x_policy_priority = 0;
3618 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3619 /* old ipsecrequest */
3620 int mode = pfkey_mode_from_xfrm(mp->mode);
3623 if (set_ipsecrequest(skb, mp->proto, mode,
3624 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3625 mp->reqid, mp->old_family,
3626 &mp->old_saddr, &mp->old_daddr) < 0)
3629 /* new ipsecrequest */
3630 if (set_ipsecrequest(skb, mp->proto, mode,
3631 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3632 mp->reqid, mp->new_family,
3633 &mp->new_saddr, &mp->new_daddr) < 0)
3637 /* broadcast migrate message to sockets */
3638 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
3647 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3648 const struct xfrm_migrate *m, int num_bundles,
3649 const struct xfrm_kmaddress *k,
3650 const struct xfrm_encap_tmpl *encap)
3652 return -ENOPROTOOPT;
3656 static int pfkey_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
3658 struct sock *sk = sock->sk;
3659 struct sk_buff *skb = NULL;
3660 struct sadb_msg *hdr = NULL;
3662 struct net *net = sock_net(sk);
3665 if (msg->msg_flags & MSG_OOB)
3669 if ((unsigned int)len > sk->sk_sndbuf - 32)
3673 skb = alloc_skb(len, GFP_KERNEL);
3678 if (memcpy_from_msg(skb_put(skb,len), msg, len))
3681 hdr = pfkey_get_base_msg(skb, &err);
3685 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
3686 err = pfkey_process(sk, skb, hdr);
3687 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
3690 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3697 static int pfkey_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
3700 struct sock *sk = sock->sk;
3701 struct pfkey_sock *pfk = pfkey_sk(sk);
3702 struct sk_buff *skb;
3706 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3709 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3715 msg->msg_flags |= MSG_TRUNC;
3719 skb_reset_transport_header(skb);
3720 err = skb_copy_datagram_msg(skb, 0, msg, copied);
3724 sock_recv_ts_and_drops(msg, sk, skb);
3726 err = (flags & MSG_TRUNC) ? skb->len : copied;
3728 if (pfk->dump.dump != NULL &&
3729 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3733 skb_free_datagram(sk, skb);
3738 static const struct proto_ops pfkey_ops = {
3740 .owner = THIS_MODULE,
3741 /* Operations that make no sense on pfkey sockets. */
3742 .bind = sock_no_bind,
3743 .connect = sock_no_connect,
3744 .socketpair = sock_no_socketpair,
3745 .accept = sock_no_accept,
3746 .getname = sock_no_getname,
3747 .ioctl = sock_no_ioctl,
3748 .listen = sock_no_listen,
3749 .shutdown = sock_no_shutdown,
3750 .setsockopt = sock_no_setsockopt,
3751 .getsockopt = sock_no_getsockopt,
3752 .mmap = sock_no_mmap,
3753 .sendpage = sock_no_sendpage,
3755 /* Now the operations that really occur. */
3756 .release = pfkey_release,
3757 .poll = datagram_poll,
3758 .sendmsg = pfkey_sendmsg,
3759 .recvmsg = pfkey_recvmsg,
3762 static const struct net_proto_family pfkey_family_ops = {
3764 .create = pfkey_create,
3765 .owner = THIS_MODULE,
3768 #ifdef CONFIG_PROC_FS
3769 static int pfkey_seq_show(struct seq_file *f, void *v)
3771 struct sock *s = sk_entry(v);
3773 if (v == SEQ_START_TOKEN)
3774 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3776 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
3778 refcount_read(&s->sk_refcnt),
3779 sk_rmem_alloc_get(s),
3780 sk_wmem_alloc_get(s),
3781 from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
3787 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3790 struct net *net = seq_file_net(f);
3791 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3794 return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
3797 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3799 struct net *net = seq_file_net(f);
3800 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3802 return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
3805 static void pfkey_seq_stop(struct seq_file *f, void *v)
3811 static const struct seq_operations pfkey_seq_ops = {
3812 .start = pfkey_seq_start,
3813 .next = pfkey_seq_next,
3814 .stop = pfkey_seq_stop,
3815 .show = pfkey_seq_show,
3818 static int __net_init pfkey_init_proc(struct net *net)
3820 struct proc_dir_entry *e;
3822 e = proc_create_net("pfkey", 0, net->proc_net, &pfkey_seq_ops,
3823 sizeof(struct seq_net_private));
3830 static void __net_exit pfkey_exit_proc(struct net *net)
3832 remove_proc_entry("pfkey", net->proc_net);
3835 static inline int pfkey_init_proc(struct net *net)
3840 static inline void pfkey_exit_proc(struct net *net)
3845 static struct xfrm_mgr pfkeyv2_mgr =
3847 .notify = pfkey_send_notify,
3848 .acquire = pfkey_send_acquire,
3849 .compile_policy = pfkey_compile_policy,
3850 .new_mapping = pfkey_send_new_mapping,
3851 .notify_policy = pfkey_send_policy_notify,
3852 .migrate = pfkey_send_migrate,
3853 .is_alive = pfkey_is_alive,
3856 static int __net_init pfkey_net_init(struct net *net)
3858 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3861 INIT_HLIST_HEAD(&net_pfkey->table);
3862 atomic_set(&net_pfkey->socks_nr, 0);
3864 rv = pfkey_init_proc(net);
3869 static void __net_exit pfkey_net_exit(struct net *net)
3871 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3873 pfkey_exit_proc(net);
3874 WARN_ON(!hlist_empty(&net_pfkey->table));
3877 static struct pernet_operations pfkey_net_ops = {
3878 .init = pfkey_net_init,
3879 .exit = pfkey_net_exit,
3880 .id = &pfkey_net_id,
3881 .size = sizeof(struct netns_pfkey),
3884 static void __exit ipsec_pfkey_exit(void)
3886 xfrm_unregister_km(&pfkeyv2_mgr);
3887 sock_unregister(PF_KEY);
3888 unregister_pernet_subsys(&pfkey_net_ops);
3889 proto_unregister(&key_proto);
3892 static int __init ipsec_pfkey_init(void)
3894 int err = proto_register(&key_proto, 0);
3899 err = register_pernet_subsys(&pfkey_net_ops);
3901 goto out_unregister_key_proto;
3902 err = sock_register(&pfkey_family_ops);
3904 goto out_unregister_pernet;
3905 err = xfrm_register_km(&pfkeyv2_mgr);
3907 goto out_sock_unregister;
3911 out_sock_unregister:
3912 sock_unregister(PF_KEY);
3913 out_unregister_pernet:
3914 unregister_pernet_subsys(&pfkey_net_ops);
3915 out_unregister_key_proto:
3916 proto_unregister(&key_proto);
3920 module_init(ipsec_pfkey_init);
3921 module_exit(ipsec_pfkey_exit);
3922 MODULE_LICENSE("GPL");
3923 MODULE_ALIAS_NETPROTO(PF_KEY);