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 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 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;
68 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
70 return (struct pfkey_sock *)sk;
73 static int pfkey_can_dump(const struct sock *sk)
75 if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
80 static void pfkey_terminate_dump(struct pfkey_sock *pfk)
84 kfree_skb(pfk->dump.skb);
88 pfk->dump.dump = NULL;
89 pfk->dump.done = NULL;
93 static void pfkey_sock_destruct(struct sock *sk)
95 struct net *net = sock_net(sk);
96 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
98 pfkey_terminate_dump(pfkey_sk(sk));
99 skb_queue_purge(&sk->sk_receive_queue);
101 if (!sock_flag(sk, SOCK_DEAD)) {
102 pr_err("Attempt to release alive pfkey socket: %p\n", sk);
106 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
107 WARN_ON(atomic_read(&sk->sk_wmem_alloc));
109 atomic_dec(&net_pfkey->socks_nr);
112 static const struct proto_ops pfkey_ops;
114 static void pfkey_insert(struct sock *sk)
116 struct net *net = sock_net(sk);
117 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
119 mutex_lock(&pfkey_mutex);
120 sk_add_node_rcu(sk, &net_pfkey->table);
121 mutex_unlock(&pfkey_mutex);
124 static void pfkey_remove(struct sock *sk)
126 mutex_lock(&pfkey_mutex);
127 sk_del_node_init_rcu(sk);
128 mutex_unlock(&pfkey_mutex);
131 static struct proto key_proto = {
133 .owner = THIS_MODULE,
134 .obj_size = sizeof(struct pfkey_sock),
137 static int pfkey_create(struct net *net, struct socket *sock, int protocol,
140 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
144 if (!capable(CAP_NET_ADMIN))
146 if (sock->type != SOCK_RAW)
147 return -ESOCKTNOSUPPORT;
148 if (protocol != PF_KEY_V2)
149 return -EPROTONOSUPPORT;
152 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
156 sock->ops = &pfkey_ops;
157 sock_init_data(sock, sk);
159 sk->sk_family = PF_KEY;
160 sk->sk_destruct = pfkey_sock_destruct;
162 atomic_inc(&net_pfkey->socks_nr);
171 static int pfkey_release(struct socket *sock)
173 struct sock *sk = sock->sk;
182 skb_queue_purge(&sk->sk_write_queue);
190 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
191 gfp_t allocation, struct sock *sk)
197 if (atomic_read(&skb->users) != 1) {
198 *skb2 = skb_clone(skb, allocation);
201 atomic_inc(&skb->users);
205 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
207 skb_set_owner_r(*skb2, sk);
208 skb_queue_tail(&sk->sk_receive_queue, *skb2);
209 sk->sk_data_ready(sk, (*skb2)->len);
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,
224 int broadcast_flags, struct sock *one_sk,
227 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
229 struct hlist_node *node;
230 struct sk_buff *skb2 = NULL;
233 /* XXX Do we need something like netlink_overrun? I think
234 * XXX PF_KEY socket apps will not mind current behavior.
240 sk_for_each_rcu(sk, node, &net_pfkey->table) {
241 struct pfkey_sock *pfk = pfkey_sk(sk);
244 /* Yes, it means that if you are meant to receive this
245 * pfkey message you receive it twice as promiscuous
249 pfkey_broadcast_one(skb, &skb2, GFP_ATOMIC, sk);
251 /* the exact target will be processed later */
254 if (broadcast_flags != BROADCAST_ALL) {
255 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
257 if ((broadcast_flags & BROADCAST_REGISTERED) &&
260 if (broadcast_flags & BROADCAST_ONE)
264 err2 = pfkey_broadcast_one(skb, &skb2, GFP_ATOMIC, sk);
266 /* Error is cleare after succecful sending to at least one
268 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
274 err = pfkey_broadcast_one(skb, &skb2, GFP_KERNEL, one_sk);
281 static int pfkey_do_dump(struct pfkey_sock *pfk)
283 struct sadb_msg *hdr;
286 rc = pfk->dump.dump(pfk);
291 if (!pfkey_can_dump(&pfk->sk))
294 hdr = (struct sadb_msg *) pfk->dump.skb->data;
295 hdr->sadb_msg_seq = 0;
296 hdr->sadb_msg_errno = rc;
297 pfkey_broadcast(pfk->dump.skb, BROADCAST_ONE,
298 &pfk->sk, sock_net(&pfk->sk));
299 pfk->dump.skb = NULL;
302 pfkey_terminate_dump(pfk);
306 static inline void pfkey_hdr_dup(struct sadb_msg *new,
307 const struct sadb_msg *orig)
312 static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk)
314 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
315 struct sadb_msg *hdr;
320 /* Woe be to the platform trying to support PFKEY yet
321 * having normal errnos outside the 1-255 range, inclusive.
324 if (err == ERESTARTSYS ||
325 err == ERESTARTNOHAND ||
326 err == ERESTARTNOINTR)
330 BUG_ON(err <= 0 || err >= 256);
332 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
333 pfkey_hdr_dup(hdr, orig);
334 hdr->sadb_msg_errno = (uint8_t) err;
335 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
338 pfkey_broadcast(skb, BROADCAST_ONE, sk, sock_net(sk));
343 static u8 sadb_ext_min_len[] = {
344 [SADB_EXT_RESERVED] = (u8) 0,
345 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
346 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
347 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
348 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
349 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
350 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
351 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
352 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
353 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
354 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
355 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
356 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
357 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
358 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
359 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
360 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
361 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
362 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
363 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
364 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
365 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
366 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
367 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
368 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
369 [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress),
372 /* Verify sadb_address_{len,prefixlen} against sa_family. */
373 static int verify_address_len(const void *p)
375 const struct sadb_address *sp = p;
376 const struct sockaddr *addr = (const struct sockaddr *)(sp + 1);
377 const struct sockaddr_in *sin;
378 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
379 const struct sockaddr_in6 *sin6;
383 switch (addr->sa_family) {
385 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
386 if (sp->sadb_address_len != len ||
387 sp->sadb_address_prefixlen > 32)
390 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
392 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
393 if (sp->sadb_address_len != len ||
394 sp->sadb_address_prefixlen > 128)
399 /* It is user using kernel to keep track of security
400 * associations for another protocol, such as
401 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
404 * XXX Actually, association/policy database is not yet
405 * XXX able to cope with arbitrary sockaddr families.
406 * XXX When it can, remove this -EINVAL. -DaveM
415 static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx)
417 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
418 sec_ctx->sadb_x_ctx_len,
422 static inline int verify_sec_ctx_len(const void *p)
424 const struct sadb_x_sec_ctx *sec_ctx = p;
425 int len = sec_ctx->sadb_x_ctx_len;
430 len = pfkey_sec_ctx_len(sec_ctx);
432 if (sec_ctx->sadb_x_sec_len != len)
438 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx)
440 struct xfrm_user_sec_ctx *uctx = NULL;
441 int ctx_size = sec_ctx->sadb_x_ctx_len;
443 uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
448 uctx->len = pfkey_sec_ctx_len(sec_ctx);
449 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
450 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
451 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
452 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
453 memcpy(uctx + 1, sec_ctx + 1,
459 static int present_and_same_family(const struct sadb_address *src,
460 const struct sadb_address *dst)
462 const struct sockaddr *s_addr, *d_addr;
467 s_addr = (const struct sockaddr *)(src + 1);
468 d_addr = (const struct sockaddr *)(dst + 1);
469 if (s_addr->sa_family != d_addr->sa_family)
471 if (s_addr->sa_family != AF_INET
472 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
473 && s_addr->sa_family != AF_INET6
481 static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs)
483 const char *p = (char *) hdr;
489 const struct sadb_ext *ehdr = (const struct sadb_ext *) p;
493 ext_len = ehdr->sadb_ext_len;
494 ext_len *= sizeof(uint64_t);
495 ext_type = ehdr->sadb_ext_type;
496 if (ext_len < sizeof(uint64_t) ||
498 ext_type == SADB_EXT_RESERVED)
501 if (ext_type <= SADB_EXT_MAX) {
502 int min = (int) sadb_ext_min_len[ext_type];
505 if (ext_hdrs[ext_type-1] != NULL)
507 if (ext_type == SADB_EXT_ADDRESS_SRC ||
508 ext_type == SADB_EXT_ADDRESS_DST ||
509 ext_type == SADB_EXT_ADDRESS_PROXY ||
510 ext_type == SADB_X_EXT_NAT_T_OA) {
511 if (verify_address_len(p))
514 if (ext_type == SADB_X_EXT_SEC_CTX) {
515 if (verify_sec_ctx_len(p))
518 ext_hdrs[ext_type-1] = (void *) p;
528 pfkey_satype2proto(uint8_t satype)
531 case SADB_SATYPE_UNSPEC:
532 return IPSEC_PROTO_ANY;
535 case SADB_SATYPE_ESP:
537 case SADB_X_SATYPE_IPCOMP:
547 pfkey_proto2satype(uint16_t proto)
551 return SADB_SATYPE_AH;
553 return SADB_SATYPE_ESP;
555 return SADB_X_SATYPE_IPCOMP;
563 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
564 * say specifically 'just raw sockets' as we encode them as 255.
567 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
569 return proto == IPSEC_PROTO_ANY ? 0 : proto;
572 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
574 return proto ? proto : IPSEC_PROTO_ANY;
577 static inline int pfkey_sockaddr_len(sa_family_t family)
581 return sizeof(struct sockaddr_in);
582 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
584 return sizeof(struct sockaddr_in6);
591 int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
593 switch (sa->sa_family) {
596 ((struct sockaddr_in *)sa)->sin_addr.s_addr;
598 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
601 &((struct sockaddr_in6 *)sa)->sin6_addr,
602 sizeof(struct in6_addr));
610 int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr)
612 return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
616 static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs)
618 const struct sadb_sa *sa;
619 const struct sadb_address *addr;
621 unsigned short family;
622 xfrm_address_t *xaddr;
624 sa = ext_hdrs[SADB_EXT_SA - 1];
628 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
632 /* sadb_address_len should be checked by caller */
633 addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
637 family = ((const struct sockaddr *)(addr + 1))->sa_family;
640 xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr;
642 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
644 xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr;
654 return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family);
657 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
660 pfkey_sockaddr_size(sa_family_t family)
662 return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
665 static inline int pfkey_mode_from_xfrm(int mode)
668 case XFRM_MODE_TRANSPORT:
669 return IPSEC_MODE_TRANSPORT;
670 case XFRM_MODE_TUNNEL:
671 return IPSEC_MODE_TUNNEL;
673 return IPSEC_MODE_BEET;
679 static inline int pfkey_mode_to_xfrm(int mode)
682 case IPSEC_MODE_ANY: /*XXX*/
683 case IPSEC_MODE_TRANSPORT:
684 return XFRM_MODE_TRANSPORT;
685 case IPSEC_MODE_TUNNEL:
686 return XFRM_MODE_TUNNEL;
687 case IPSEC_MODE_BEET:
688 return XFRM_MODE_BEET;
694 static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port,
696 unsigned short family)
701 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
702 sin->sin_family = AF_INET;
703 sin->sin_port = port;
704 sin->sin_addr.s_addr = xaddr->a4;
705 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
708 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
711 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
712 sin6->sin6_family = AF_INET6;
713 sin6->sin6_port = port;
714 sin6->sin6_flowinfo = 0;
715 ipv6_addr_copy(&sin6->sin6_addr, (const struct in6_addr *)xaddr->a6);
716 sin6->sin6_scope_id = 0;
724 static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x,
725 int add_keys, int hsc)
728 struct sadb_msg *hdr;
730 struct sadb_lifetime *lifetime;
731 struct sadb_address *addr;
732 struct sadb_key *key;
733 struct sadb_x_sa2 *sa2;
734 struct sadb_x_sec_ctx *sec_ctx;
735 struct xfrm_sec_ctx *xfrm_ctx;
738 int auth_key_size = 0;
739 int encrypt_key_size = 0;
741 struct xfrm_encap_tmpl *natt = NULL;
744 /* address family check */
745 sockaddr_size = pfkey_sockaddr_size(x->props.family);
747 return ERR_PTR(-EINVAL);
749 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
750 key(AE), (identity(SD),) (sensitivity)> */
751 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
752 sizeof(struct sadb_lifetime) +
753 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
754 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
755 sizeof(struct sadb_address)*2 +
757 sizeof(struct sadb_x_sa2);
759 if ((xfrm_ctx = x->security)) {
760 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
761 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
764 /* identity & sensitivity */
765 if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, x->props.family))
766 size += sizeof(struct sadb_address) + sockaddr_size;
769 if (x->aalg && x->aalg->alg_key_len) {
771 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
772 size += sizeof(struct sadb_key) + auth_key_size;
774 if (x->ealg && x->ealg->alg_key_len) {
776 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
777 size += sizeof(struct sadb_key) + encrypt_key_size;
783 if (natt && natt->encap_type) {
784 size += sizeof(struct sadb_x_nat_t_type);
785 size += sizeof(struct sadb_x_nat_t_port);
786 size += sizeof(struct sadb_x_nat_t_port);
789 skb = alloc_skb(size + 16, GFP_ATOMIC);
791 return ERR_PTR(-ENOBUFS);
793 /* call should fill header later */
794 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
795 memset(hdr, 0, size); /* XXX do we need this ? */
796 hdr->sadb_msg_len = size / sizeof(uint64_t);
799 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
800 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
801 sa->sadb_sa_exttype = SADB_EXT_SA;
802 sa->sadb_sa_spi = x->id.spi;
803 sa->sadb_sa_replay = x->props.replay_window;
804 switch (x->km.state) {
805 case XFRM_STATE_VALID:
806 sa->sadb_sa_state = x->km.dying ?
807 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
810 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
813 sa->sadb_sa_state = SADB_SASTATE_DEAD;
816 sa->sadb_sa_auth = 0;
818 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
819 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
821 sa->sadb_sa_encrypt = 0;
822 BUG_ON(x->ealg && x->calg);
824 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
825 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
827 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
829 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
830 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
833 sa->sadb_sa_flags = 0;
834 if (x->props.flags & XFRM_STATE_NOECN)
835 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
836 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
837 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
838 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
839 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
843 lifetime = (struct sadb_lifetime *) skb_put(skb,
844 sizeof(struct sadb_lifetime));
845 lifetime->sadb_lifetime_len =
846 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
847 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
848 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
849 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
850 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
851 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
855 lifetime = (struct sadb_lifetime *) skb_put(skb,
856 sizeof(struct sadb_lifetime));
857 lifetime->sadb_lifetime_len =
858 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
859 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
860 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
861 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
862 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
863 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
866 lifetime = (struct sadb_lifetime *) skb_put(skb,
867 sizeof(struct sadb_lifetime));
868 lifetime->sadb_lifetime_len =
869 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
870 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
871 lifetime->sadb_lifetime_allocations = x->curlft.packets;
872 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
873 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
874 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
876 addr = (struct sadb_address*) skb_put(skb,
877 sizeof(struct sadb_address)+sockaddr_size);
878 addr->sadb_address_len =
879 (sizeof(struct sadb_address)+sockaddr_size)/
881 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
882 /* "if the ports are non-zero, then the sadb_address_proto field,
883 normally zero, MUST be filled in with the transport
884 protocol's number." - RFC2367 */
885 addr->sadb_address_proto = 0;
886 addr->sadb_address_reserved = 0;
888 addr->sadb_address_prefixlen =
889 pfkey_sockaddr_fill(&x->props.saddr, 0,
890 (struct sockaddr *) (addr + 1),
892 if (!addr->sadb_address_prefixlen)
896 addr = (struct sadb_address*) skb_put(skb,
897 sizeof(struct sadb_address)+sockaddr_size);
898 addr->sadb_address_len =
899 (sizeof(struct sadb_address)+sockaddr_size)/
901 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
902 addr->sadb_address_proto = 0;
903 addr->sadb_address_reserved = 0;
905 addr->sadb_address_prefixlen =
906 pfkey_sockaddr_fill(&x->id.daddr, 0,
907 (struct sockaddr *) (addr + 1),
909 if (!addr->sadb_address_prefixlen)
912 if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr,
914 addr = (struct sadb_address*) skb_put(skb,
915 sizeof(struct sadb_address)+sockaddr_size);
916 addr->sadb_address_len =
917 (sizeof(struct sadb_address)+sockaddr_size)/
919 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
920 addr->sadb_address_proto =
921 pfkey_proto_from_xfrm(x->sel.proto);
922 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
923 addr->sadb_address_reserved = 0;
925 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
926 (struct sockaddr *) (addr + 1),
931 if (add_keys && auth_key_size) {
932 key = (struct sadb_key *) skb_put(skb,
933 sizeof(struct sadb_key)+auth_key_size);
934 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
936 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
937 key->sadb_key_bits = x->aalg->alg_key_len;
938 key->sadb_key_reserved = 0;
939 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
942 if (add_keys && encrypt_key_size) {
943 key = (struct sadb_key *) skb_put(skb,
944 sizeof(struct sadb_key)+encrypt_key_size);
945 key->sadb_key_len = (sizeof(struct sadb_key) +
946 encrypt_key_size) / sizeof(uint64_t);
947 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
948 key->sadb_key_bits = x->ealg->alg_key_len;
949 key->sadb_key_reserved = 0;
950 memcpy(key + 1, x->ealg->alg_key,
951 (x->ealg->alg_key_len+7)/8);
955 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
956 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
957 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
958 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
960 return ERR_PTR(-EINVAL);
962 sa2->sadb_x_sa2_mode = mode;
963 sa2->sadb_x_sa2_reserved1 = 0;
964 sa2->sadb_x_sa2_reserved2 = 0;
965 sa2->sadb_x_sa2_sequence = 0;
966 sa2->sadb_x_sa2_reqid = x->props.reqid;
968 if (natt && natt->encap_type) {
969 struct sadb_x_nat_t_type *n_type;
970 struct sadb_x_nat_t_port *n_port;
973 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
974 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
975 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
976 n_type->sadb_x_nat_t_type_type = natt->encap_type;
977 n_type->sadb_x_nat_t_type_reserved[0] = 0;
978 n_type->sadb_x_nat_t_type_reserved[1] = 0;
979 n_type->sadb_x_nat_t_type_reserved[2] = 0;
982 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
983 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
984 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
985 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
986 n_port->sadb_x_nat_t_port_reserved = 0;
989 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
990 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
991 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
992 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
993 n_port->sadb_x_nat_t_port_reserved = 0;
996 /* security context */
998 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
999 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1000 sec_ctx->sadb_x_sec_len =
1001 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1002 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1003 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1004 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1005 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1006 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1014 static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x)
1016 struct sk_buff *skb;
1018 skb = __pfkey_xfrm_state2msg(x, 1, 3);
1023 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x,
1026 return __pfkey_xfrm_state2msg(x, 0, hsc);
1029 static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
1030 const struct sadb_msg *hdr,
1031 void * const *ext_hdrs)
1033 struct xfrm_state *x;
1034 const struct sadb_lifetime *lifetime;
1035 const struct sadb_sa *sa;
1036 const struct sadb_key *key;
1037 const struct sadb_x_sec_ctx *sec_ctx;
1042 sa = ext_hdrs[SADB_EXT_SA - 1];
1044 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1045 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1046 return ERR_PTR(-EINVAL);
1047 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1048 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1049 return ERR_PTR(-EINVAL);
1050 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1051 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1052 return ERR_PTR(-EINVAL);
1053 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1054 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1055 return ERR_PTR(-EINVAL);
1057 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1059 return ERR_PTR(-EINVAL);
1061 /* default error is no buffer space */
1066 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1067 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1068 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1069 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1070 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1073 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1074 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1076 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1077 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1078 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1079 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1080 return ERR_PTR(-EINVAL);
1081 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1083 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1084 ((key->sadb_key_bits+7) / 8 == 0 ||
1085 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1086 return ERR_PTR(-EINVAL);
1087 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1089 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1090 ((key->sadb_key_bits+7) / 8 == 0 ||
1091 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1092 return ERR_PTR(-EINVAL);
1094 x = xfrm_state_alloc(net);
1096 return ERR_PTR(-ENOBUFS);
1098 x->id.proto = proto;
1099 x->id.spi = sa->sadb_sa_spi;
1100 x->props.replay_window = sa->sadb_sa_replay;
1101 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1102 x->props.flags |= XFRM_STATE_NOECN;
1103 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1104 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1105 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1106 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1108 lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1];
1109 if (lifetime != NULL) {
1110 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1111 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1112 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1113 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1115 lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1];
1116 if (lifetime != NULL) {
1117 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1118 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1119 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1120 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1123 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
1124 if (sec_ctx != NULL) {
1125 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1130 err = security_xfrm_state_alloc(x, uctx);
1137 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1138 if (sa->sadb_sa_auth) {
1140 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1146 keysize = (key->sadb_key_bits + 7) / 8;
1147 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1150 strcpy(x->aalg->alg_name, a->name);
1151 x->aalg->alg_key_len = 0;
1153 x->aalg->alg_key_len = key->sadb_key_bits;
1154 memcpy(x->aalg->alg_key, key+1, keysize);
1156 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1157 x->props.aalgo = sa->sadb_sa_auth;
1158 /* x->algo.flags = sa->sadb_sa_flags; */
1160 if (sa->sadb_sa_encrypt) {
1161 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1162 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1167 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1170 strcpy(x->calg->alg_name, a->name);
1171 x->props.calgo = sa->sadb_sa_encrypt;
1174 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1179 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1181 keysize = (key->sadb_key_bits + 7) / 8;
1182 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1185 strcpy(x->ealg->alg_name, a->name);
1186 x->ealg->alg_key_len = 0;
1188 x->ealg->alg_key_len = key->sadb_key_bits;
1189 memcpy(x->ealg->alg_key, key+1, keysize);
1191 x->props.ealgo = sa->sadb_sa_encrypt;
1194 /* x->algo.flags = sa->sadb_sa_flags; */
1196 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1198 if (!x->props.family) {
1199 err = -EAFNOSUPPORT;
1202 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1205 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1206 const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
1207 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1212 x->props.mode = mode;
1213 x->props.reqid = sa2->sadb_x_sa2_reqid;
1216 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1217 const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1219 /* Nobody uses this, but we try. */
1220 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1221 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1225 x->sel.family = x->props.family;
1227 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1228 const struct sadb_x_nat_t_type* n_type;
1229 struct xfrm_encap_tmpl *natt;
1231 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1236 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1237 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1239 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1240 const struct sadb_x_nat_t_port *n_port =
1241 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1242 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1244 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1245 const struct sadb_x_nat_t_port *n_port =
1246 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1247 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1249 memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
1252 err = xfrm_init_state(x);
1256 x->km.seq = hdr->sadb_msg_seq;
1260 x->km.state = XFRM_STATE_DEAD;
1262 return ERR_PTR(err);
1265 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1270 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1272 struct net *net = sock_net(sk);
1273 struct sk_buff *resp_skb;
1274 struct sadb_x_sa2 *sa2;
1275 struct sadb_address *saddr, *daddr;
1276 struct sadb_msg *out_hdr;
1277 struct sadb_spirange *range;
1278 struct xfrm_state *x = NULL;
1281 u32 min_spi, max_spi;
1284 unsigned short family;
1285 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1287 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1288 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1291 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1295 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1296 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1299 reqid = sa2->sadb_x_sa2_reqid;
1305 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1306 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1308 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1311 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1312 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1314 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1316 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1317 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1322 if (hdr->sadb_msg_seq) {
1323 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1324 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1331 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family);
1337 max_spi = 0x0fffffff;
1339 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1341 min_spi = range->sadb_spirange_min;
1342 max_spi = range->sadb_spirange_max;
1345 err = xfrm_alloc_spi(x, min_spi, max_spi);
1346 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1348 if (IS_ERR(resp_skb)) {
1350 return PTR_ERR(resp_skb);
1353 out_hdr = (struct sadb_msg *) resp_skb->data;
1354 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1355 out_hdr->sadb_msg_type = SADB_GETSPI;
1356 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1357 out_hdr->sadb_msg_errno = 0;
1358 out_hdr->sadb_msg_reserved = 0;
1359 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1360 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1364 pfkey_broadcast(resp_skb, BROADCAST_ONE, sk, net);
1369 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1371 struct net *net = sock_net(sk);
1372 struct xfrm_state *x;
1374 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1377 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1380 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1384 spin_lock_bh(&x->lock);
1385 if (x->km.state == XFRM_STATE_ACQ) {
1386 x->km.state = XFRM_STATE_ERROR;
1387 wake_up(&net->xfrm.km_waitq);
1389 spin_unlock_bh(&x->lock);
1394 static inline int event2poltype(int event)
1397 case XFRM_MSG_DELPOLICY:
1398 return SADB_X_SPDDELETE;
1399 case XFRM_MSG_NEWPOLICY:
1400 return SADB_X_SPDADD;
1401 case XFRM_MSG_UPDPOLICY:
1402 return SADB_X_SPDUPDATE;
1403 case XFRM_MSG_POLEXPIRE:
1404 // return SADB_X_SPDEXPIRE;
1406 pr_err("pfkey: Unknown policy event %d\n", event);
1413 static inline int event2keytype(int event)
1416 case XFRM_MSG_DELSA:
1418 case XFRM_MSG_NEWSA:
1420 case XFRM_MSG_UPDSA:
1422 case XFRM_MSG_EXPIRE:
1425 pr_err("pfkey: Unknown SA event %d\n", event);
1433 static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
1435 struct sk_buff *skb;
1436 struct sadb_msg *hdr;
1438 skb = pfkey_xfrm_state2msg(x);
1441 return PTR_ERR(skb);
1443 hdr = (struct sadb_msg *) skb->data;
1444 hdr->sadb_msg_version = PF_KEY_V2;
1445 hdr->sadb_msg_type = event2keytype(c->event);
1446 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1447 hdr->sadb_msg_errno = 0;
1448 hdr->sadb_msg_reserved = 0;
1449 hdr->sadb_msg_seq = c->seq;
1450 hdr->sadb_msg_pid = c->pid;
1452 pfkey_broadcast(skb, BROADCAST_ALL, NULL, xs_net(x));
1457 static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1459 struct net *net = sock_net(sk);
1460 struct xfrm_state *x;
1464 x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1469 if (hdr->sadb_msg_type == SADB_ADD)
1470 err = xfrm_state_add(x);
1472 err = xfrm_state_update(x);
1474 xfrm_audit_state_add(x, err ? 0 : 1,
1475 audit_get_loginuid(current),
1476 audit_get_sessionid(current), 0);
1479 x->km.state = XFRM_STATE_DEAD;
1480 __xfrm_state_put(x);
1484 if (hdr->sadb_msg_type == SADB_ADD)
1485 c.event = XFRM_MSG_NEWSA;
1487 c.event = XFRM_MSG_UPDSA;
1488 c.seq = hdr->sadb_msg_seq;
1489 c.pid = hdr->sadb_msg_pid;
1490 km_state_notify(x, &c);
1496 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1498 struct net *net = sock_net(sk);
1499 struct xfrm_state *x;
1503 if (!ext_hdrs[SADB_EXT_SA-1] ||
1504 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1505 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1508 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1512 if ((err = security_xfrm_state_delete(x)))
1515 if (xfrm_state_kern(x)) {
1520 err = xfrm_state_delete(x);
1525 c.seq = hdr->sadb_msg_seq;
1526 c.pid = hdr->sadb_msg_pid;
1527 c.event = XFRM_MSG_DELSA;
1528 km_state_notify(x, &c);
1530 xfrm_audit_state_delete(x, err ? 0 : 1,
1531 audit_get_loginuid(current),
1532 audit_get_sessionid(current), 0);
1538 static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1540 struct net *net = sock_net(sk);
1542 struct sk_buff *out_skb;
1543 struct sadb_msg *out_hdr;
1544 struct xfrm_state *x;
1546 if (!ext_hdrs[SADB_EXT_SA-1] ||
1547 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1548 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1551 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1555 out_skb = pfkey_xfrm_state2msg(x);
1556 proto = x->id.proto;
1558 if (IS_ERR(out_skb))
1559 return PTR_ERR(out_skb);
1561 out_hdr = (struct sadb_msg *) out_skb->data;
1562 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1563 out_hdr->sadb_msg_type = SADB_GET;
1564 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1565 out_hdr->sadb_msg_errno = 0;
1566 out_hdr->sadb_msg_reserved = 0;
1567 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1568 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1569 pfkey_broadcast(out_skb, BROADCAST_ONE, sk, sock_net(sk));
1574 static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
1577 struct sk_buff *skb;
1578 struct sadb_msg *hdr;
1579 int len, auth_len, enc_len, i;
1581 auth_len = xfrm_count_auth_supported();
1583 auth_len *= sizeof(struct sadb_alg);
1584 auth_len += sizeof(struct sadb_supported);
1587 enc_len = xfrm_count_enc_supported();
1589 enc_len *= sizeof(struct sadb_alg);
1590 enc_len += sizeof(struct sadb_supported);
1593 len = enc_len + auth_len + sizeof(struct sadb_msg);
1595 skb = alloc_skb(len + 16, allocation);
1599 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1600 pfkey_hdr_dup(hdr, orig);
1601 hdr->sadb_msg_errno = 0;
1602 hdr->sadb_msg_len = len / sizeof(uint64_t);
1605 struct sadb_supported *sp;
1606 struct sadb_alg *ap;
1608 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1609 ap = (struct sadb_alg *) (sp + 1);
1611 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1612 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1614 for (i = 0; ; i++) {
1615 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1618 if (aalg->available)
1624 struct sadb_supported *sp;
1625 struct sadb_alg *ap;
1627 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1628 ap = (struct sadb_alg *) (sp + 1);
1630 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1631 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1633 for (i = 0; ; i++) {
1634 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1637 if (ealg->available)
1646 static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1648 struct pfkey_sock *pfk = pfkey_sk(sk);
1649 struct sk_buff *supp_skb;
1651 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1654 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1655 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1657 pfk->registered |= (1<<hdr->sadb_msg_satype);
1662 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1664 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1665 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1670 pfkey_broadcast(supp_skb, BROADCAST_REGISTERED, sk, sock_net(sk));
1675 static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
1677 struct sk_buff *skb;
1678 struct sadb_msg *hdr;
1680 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1684 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1685 memcpy(hdr, ihdr, sizeof(struct sadb_msg));
1686 hdr->sadb_msg_errno = (uint8_t) 0;
1687 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1689 return pfkey_broadcast(skb, BROADCAST_ONE, sk, sock_net(sk));
1692 static int key_notify_sa_flush(const struct km_event *c)
1694 struct sk_buff *skb;
1695 struct sadb_msg *hdr;
1697 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1700 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1701 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1702 hdr->sadb_msg_type = SADB_FLUSH;
1703 hdr->sadb_msg_seq = c->seq;
1704 hdr->sadb_msg_pid = c->pid;
1705 hdr->sadb_msg_version = PF_KEY_V2;
1706 hdr->sadb_msg_errno = (uint8_t) 0;
1707 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1708 hdr->sadb_msg_reserved = 0;
1710 pfkey_broadcast(skb, BROADCAST_ALL, NULL, c->net);
1715 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1717 struct net *net = sock_net(sk);
1720 struct xfrm_audit audit_info;
1723 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1727 audit_info.loginuid = audit_get_loginuid(current);
1728 audit_info.sessionid = audit_get_sessionid(current);
1729 audit_info.secid = 0;
1730 err = xfrm_state_flush(net, proto, &audit_info);
1731 err2 = unicast_flush_resp(sk, hdr);
1733 if (err == -ESRCH) /* empty table - go quietly */
1735 return err ? err : err2;
1738 c.data.proto = proto;
1739 c.seq = hdr->sadb_msg_seq;
1740 c.pid = hdr->sadb_msg_pid;
1741 c.event = XFRM_MSG_FLUSHSA;
1743 km_state_notify(NULL, &c);
1748 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1750 struct pfkey_sock *pfk = ptr;
1751 struct sk_buff *out_skb;
1752 struct sadb_msg *out_hdr;
1754 if (!pfkey_can_dump(&pfk->sk))
1757 out_skb = pfkey_xfrm_state2msg(x);
1758 if (IS_ERR(out_skb))
1759 return PTR_ERR(out_skb);
1761 out_hdr = (struct sadb_msg *) out_skb->data;
1762 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1763 out_hdr->sadb_msg_type = SADB_DUMP;
1764 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1765 out_hdr->sadb_msg_errno = 0;
1766 out_hdr->sadb_msg_reserved = 0;
1767 out_hdr->sadb_msg_seq = count + 1;
1768 out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
1771 pfkey_broadcast(pfk->dump.skb, BROADCAST_ONE,
1772 &pfk->sk, sock_net(&pfk->sk));
1773 pfk->dump.skb = out_skb;
1778 static int pfkey_dump_sa(struct pfkey_sock *pfk)
1780 struct net *net = sock_net(&pfk->sk);
1781 return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1784 static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1786 xfrm_state_walk_done(&pfk->dump.u.state);
1789 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1792 struct pfkey_sock *pfk = pfkey_sk(sk);
1794 if (pfk->dump.dump != NULL)
1797 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1801 pfk->dump.msg_version = hdr->sadb_msg_version;
1802 pfk->dump.msg_pid = hdr->sadb_msg_pid;
1803 pfk->dump.dump = pfkey_dump_sa;
1804 pfk->dump.done = pfkey_dump_sa_done;
1805 xfrm_state_walk_init(&pfk->dump.u.state, proto);
1807 return pfkey_do_dump(pfk);
1810 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1812 struct pfkey_sock *pfk = pfkey_sk(sk);
1813 int satype = hdr->sadb_msg_satype;
1814 bool reset_errno = false;
1816 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1818 if (satype != 0 && satype != 1)
1820 pfk->promisc = satype;
1822 if (reset_errno && skb_cloned(skb))
1823 skb = skb_copy(skb, GFP_KERNEL);
1825 skb = skb_clone(skb, GFP_KERNEL);
1827 if (reset_errno && skb) {
1828 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1829 new_hdr->sadb_msg_errno = 0;
1832 pfkey_broadcast(skb, BROADCAST_ALL, NULL, sock_net(sk));
1836 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1839 u32 reqid = *(u32*)ptr;
1841 for (i=0; i<xp->xfrm_nr; i++) {
1842 if (xp->xfrm_vec[i].reqid == reqid)
1848 static u32 gen_reqid(struct net *net)
1850 struct xfrm_policy_walk walk;
1853 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1859 reqid = IPSEC_MANUAL_REQID_MAX+1;
1860 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1861 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1862 xfrm_policy_walk_done(&walk);
1865 } while (reqid != start);
1870 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1872 struct net *net = xp_net(xp);
1873 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1876 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1879 if (rq->sadb_x_ipsecrequest_mode == 0)
1882 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1883 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1886 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1888 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1889 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1890 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1892 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1896 /* addresses present only in tunnel mode */
1897 if (t->mode == XFRM_MODE_TUNNEL) {
1898 u8 *sa = (u8 *) (rq + 1);
1899 int family, socklen;
1901 family = pfkey_sockaddr_extract((struct sockaddr *)sa,
1906 socklen = pfkey_sockaddr_len(family);
1907 if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen),
1908 &t->id.daddr) != family)
1910 t->encap_family = family;
1912 t->encap_family = xp->family;
1914 /* No way to set this via kame pfkey */
1921 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1924 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1925 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1927 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1928 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1930 len -= rq->sadb_x_ipsecrequest_len;
1931 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1936 static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
1938 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1941 int len = sizeof(struct sadb_x_sec_ctx);
1942 len += xfrm_ctx->ctx_len;
1943 return PFKEY_ALIGN8(len);
1948 static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
1950 const struct xfrm_tmpl *t;
1951 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1955 for (i=0; i<xp->xfrm_nr; i++) {
1956 t = xp->xfrm_vec + i;
1957 socklen += pfkey_sockaddr_len(t->encap_family);
1960 return sizeof(struct sadb_msg) +
1961 (sizeof(struct sadb_lifetime) * 3) +
1962 (sizeof(struct sadb_address) * 2) +
1963 (sockaddr_size * 2) +
1964 sizeof(struct sadb_x_policy) +
1965 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1967 pfkey_xfrm_policy2sec_ctx_size(xp);
1970 static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
1972 struct sk_buff *skb;
1975 size = pfkey_xfrm_policy2msg_size(xp);
1977 skb = alloc_skb(size + 16, GFP_ATOMIC);
1979 return ERR_PTR(-ENOBUFS);
1984 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
1986 struct sadb_msg *hdr;
1987 struct sadb_address *addr;
1988 struct sadb_lifetime *lifetime;
1989 struct sadb_x_policy *pol;
1990 struct sadb_x_sec_ctx *sec_ctx;
1991 struct xfrm_sec_ctx *xfrm_ctx;
1994 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1995 int socklen = pfkey_sockaddr_len(xp->family);
1997 size = pfkey_xfrm_policy2msg_size(xp);
1999 /* call should fill header later */
2000 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2001 memset(hdr, 0, size); /* XXX do we need this ? */
2004 addr = (struct sadb_address*) skb_put(skb,
2005 sizeof(struct sadb_address)+sockaddr_size);
2006 addr->sadb_address_len =
2007 (sizeof(struct sadb_address)+sockaddr_size)/
2009 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2010 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2011 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2012 addr->sadb_address_reserved = 0;
2013 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2015 (struct sockaddr *) (addr + 1),
2020 addr = (struct sadb_address*) skb_put(skb,
2021 sizeof(struct sadb_address)+sockaddr_size);
2022 addr->sadb_address_len =
2023 (sizeof(struct sadb_address)+sockaddr_size)/
2025 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2026 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2027 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2028 addr->sadb_address_reserved = 0;
2030 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2031 (struct sockaddr *) (addr + 1),
2035 lifetime = (struct sadb_lifetime *) skb_put(skb,
2036 sizeof(struct sadb_lifetime));
2037 lifetime->sadb_lifetime_len =
2038 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2039 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2040 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2041 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2042 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2043 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2045 lifetime = (struct sadb_lifetime *) skb_put(skb,
2046 sizeof(struct sadb_lifetime));
2047 lifetime->sadb_lifetime_len =
2048 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2049 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2050 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2051 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2052 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2053 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2055 lifetime = (struct sadb_lifetime *) skb_put(skb,
2056 sizeof(struct sadb_lifetime));
2057 lifetime->sadb_lifetime_len =
2058 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2059 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2060 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2061 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2062 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2063 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2065 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2066 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2067 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2068 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2069 if (xp->action == XFRM_POLICY_ALLOW) {
2071 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2073 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2075 pol->sadb_x_policy_dir = dir+1;
2076 pol->sadb_x_policy_reserved = 0;
2077 pol->sadb_x_policy_id = xp->index;
2078 pol->sadb_x_policy_priority = xp->priority;
2080 for (i=0; i<xp->xfrm_nr; i++) {
2081 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
2082 struct sadb_x_ipsecrequest *rq;
2086 req_size = sizeof(struct sadb_x_ipsecrequest);
2087 if (t->mode == XFRM_MODE_TUNNEL) {
2088 socklen = pfkey_sockaddr_len(t->encap_family);
2089 req_size += socklen * 2;
2093 rq = (void*)skb_put(skb, req_size);
2094 pol->sadb_x_policy_len += req_size/8;
2095 memset(rq, 0, sizeof(*rq));
2096 rq->sadb_x_ipsecrequest_len = req_size;
2097 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2098 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2100 rq->sadb_x_ipsecrequest_mode = mode;
2101 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2103 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2105 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2106 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2108 if (t->mode == XFRM_MODE_TUNNEL) {
2109 u8 *sa = (void *)(rq + 1);
2110 pfkey_sockaddr_fill(&t->saddr, 0,
2111 (struct sockaddr *)sa,
2113 pfkey_sockaddr_fill(&t->id.daddr, 0,
2114 (struct sockaddr *) (sa + socklen),
2119 /* security context */
2120 if ((xfrm_ctx = xp->security)) {
2121 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2123 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2124 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2125 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2126 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2127 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2128 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2129 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2133 hdr->sadb_msg_len = size / sizeof(uint64_t);
2134 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2139 static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2141 struct sk_buff *out_skb;
2142 struct sadb_msg *out_hdr;
2145 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2146 if (IS_ERR(out_skb))
2147 return PTR_ERR(out_skb);
2149 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2153 out_hdr = (struct sadb_msg *) out_skb->data;
2154 out_hdr->sadb_msg_version = PF_KEY_V2;
2156 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2157 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2159 out_hdr->sadb_msg_type = event2poltype(c->event);
2160 out_hdr->sadb_msg_errno = 0;
2161 out_hdr->sadb_msg_seq = c->seq;
2162 out_hdr->sadb_msg_pid = c->pid;
2163 pfkey_broadcast(out_skb, BROADCAST_ALL, NULL, xp_net(xp));
2168 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2170 struct net *net = sock_net(sk);
2172 struct sadb_lifetime *lifetime;
2173 struct sadb_address *sa;
2174 struct sadb_x_policy *pol;
2175 struct xfrm_policy *xp;
2177 struct sadb_x_sec_ctx *sec_ctx;
2179 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2180 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2181 !ext_hdrs[SADB_X_EXT_POLICY-1])
2184 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2185 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2187 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2190 xp = xfrm_policy_alloc(net, GFP_KERNEL);
2194 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2195 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2196 xp->priority = pol->sadb_x_policy_priority;
2198 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2199 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2204 xp->selector.family = xp->family;
2205 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2206 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2207 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2208 if (xp->selector.sport)
2209 xp->selector.sport_mask = htons(0xffff);
2211 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2212 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2213 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2215 /* Amusing, we set this twice. KAME apps appear to set same value
2216 * in both addresses.
2218 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2220 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2221 if (xp->selector.dport)
2222 xp->selector.dport_mask = htons(0xffff);
2224 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2225 if (sec_ctx != NULL) {
2226 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2233 err = security_xfrm_policy_alloc(&xp->security, uctx);
2240 xp->lft.soft_byte_limit = XFRM_INF;
2241 xp->lft.hard_byte_limit = XFRM_INF;
2242 xp->lft.soft_packet_limit = XFRM_INF;
2243 xp->lft.hard_packet_limit = XFRM_INF;
2244 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2245 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2246 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2247 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2248 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2250 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2251 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2252 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2253 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2254 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2257 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2258 (err = parse_ipsecrequests(xp, pol)) < 0)
2261 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2262 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2264 xfrm_audit_policy_add(xp, err ? 0 : 1,
2265 audit_get_loginuid(current),
2266 audit_get_sessionid(current), 0);
2271 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2272 c.event = XFRM_MSG_UPDPOLICY;
2274 c.event = XFRM_MSG_NEWPOLICY;
2276 c.seq = hdr->sadb_msg_seq;
2277 c.pid = hdr->sadb_msg_pid;
2279 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2285 xfrm_policy_destroy(xp);
2289 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2291 struct net *net = sock_net(sk);
2293 struct sadb_address *sa;
2294 struct sadb_x_policy *pol;
2295 struct xfrm_policy *xp;
2296 struct xfrm_selector sel;
2298 struct sadb_x_sec_ctx *sec_ctx;
2299 struct xfrm_sec_ctx *pol_ctx = NULL;
2301 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2302 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2303 !ext_hdrs[SADB_X_EXT_POLICY-1])
2306 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2307 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2310 memset(&sel, 0, sizeof(sel));
2312 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2313 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2314 sel.prefixlen_s = sa->sadb_address_prefixlen;
2315 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2316 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2318 sel.sport_mask = htons(0xffff);
2320 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2321 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2322 sel.prefixlen_d = sa->sadb_address_prefixlen;
2323 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2324 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2326 sel.dport_mask = htons(0xffff);
2328 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2329 if (sec_ctx != NULL) {
2330 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2335 err = security_xfrm_policy_alloc(&pol_ctx, uctx);
2341 xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2342 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2344 security_xfrm_policy_free(pol_ctx);
2348 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2349 audit_get_loginuid(current),
2350 audit_get_sessionid(current), 0);
2355 c.seq = hdr->sadb_msg_seq;
2356 c.pid = hdr->sadb_msg_pid;
2358 c.event = XFRM_MSG_DELPOLICY;
2359 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2366 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
2369 struct sk_buff *out_skb;
2370 struct sadb_msg *out_hdr;
2373 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2374 if (IS_ERR(out_skb)) {
2375 err = PTR_ERR(out_skb);
2378 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2382 out_hdr = (struct sadb_msg *) out_skb->data;
2383 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2384 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2385 out_hdr->sadb_msg_satype = 0;
2386 out_hdr->sadb_msg_errno = 0;
2387 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2388 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2389 pfkey_broadcast(out_skb, BROADCAST_ONE, sk, xp_net(xp));
2396 #ifdef CONFIG_NET_KEY_MIGRATE
2397 static int pfkey_sockaddr_pair_size(sa_family_t family)
2399 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2402 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2403 xfrm_address_t *saddr, xfrm_address_t *daddr,
2408 if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2411 af = pfkey_sockaddr_extract(sa, saddr);
2415 socklen = pfkey_sockaddr_len(af);
2416 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2424 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2425 struct xfrm_migrate *m)
2428 struct sadb_x_ipsecrequest *rq2;
2431 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2432 len < rq1->sadb_x_ipsecrequest_len)
2436 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2437 rq1->sadb_x_ipsecrequest_len,
2438 &m->old_saddr, &m->old_daddr,
2443 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2444 len -= rq1->sadb_x_ipsecrequest_len;
2446 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2447 len < rq2->sadb_x_ipsecrequest_len)
2451 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2452 rq2->sadb_x_ipsecrequest_len,
2453 &m->new_saddr, &m->new_daddr,
2458 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2459 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2460 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2463 m->proto = rq1->sadb_x_ipsecrequest_proto;
2464 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2467 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2469 return ((int)(rq1->sadb_x_ipsecrequest_len +
2470 rq2->sadb_x_ipsecrequest_len));
2473 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2474 const struct sadb_msg *hdr, void * const *ext_hdrs)
2476 int i, len, ret, err = -EINVAL;
2478 struct sadb_address *sa;
2479 struct sadb_x_kmaddress *kma;
2480 struct sadb_x_policy *pol;
2481 struct sadb_x_ipsecrequest *rq;
2482 struct xfrm_selector sel;
2483 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2484 struct xfrm_kmaddress k;
2486 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2487 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2488 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2493 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2494 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2496 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2502 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2503 k.reserved = kma->sadb_x_kmaddress_reserved;
2504 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2505 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2506 &k.local, &k.remote, &k.family);
2513 dir = pol->sadb_x_policy_dir - 1;
2514 memset(&sel, 0, sizeof(sel));
2516 /* set source address info of selector */
2517 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2518 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2519 sel.prefixlen_s = sa->sadb_address_prefixlen;
2520 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2521 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2523 sel.sport_mask = htons(0xffff);
2525 /* set destination address info of selector */
2526 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2527 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2528 sel.prefixlen_d = sa->sadb_address_prefixlen;
2529 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2530 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2532 sel.dport_mask = htons(0xffff);
2534 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2536 /* extract ipsecrequests */
2538 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2540 while (len > 0 && i < XFRM_MAX_DEPTH) {
2541 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2546 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2552 if (!i || len > 0) {
2557 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2564 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2565 const struct sadb_msg *hdr, void * const *ext_hdrs)
2567 return -ENOPROTOOPT;
2572 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2574 struct net *net = sock_net(sk);
2576 int err = 0, delete;
2577 struct sadb_x_policy *pol;
2578 struct xfrm_policy *xp;
2581 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2584 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2585 if (dir >= XFRM_POLICY_MAX)
2588 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2589 xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2590 dir, pol->sadb_x_policy_id, delete, &err);
2595 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2596 audit_get_loginuid(current),
2597 audit_get_sessionid(current), 0);
2601 c.seq = hdr->sadb_msg_seq;
2602 c.pid = hdr->sadb_msg_pid;
2604 c.event = XFRM_MSG_DELPOLICY;
2605 km_policy_notify(xp, dir, &c);
2607 err = key_pol_get_resp(sk, xp, hdr, dir);
2615 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2617 struct pfkey_sock *pfk = ptr;
2618 struct sk_buff *out_skb;
2619 struct sadb_msg *out_hdr;
2622 if (!pfkey_can_dump(&pfk->sk))
2625 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2626 if (IS_ERR(out_skb))
2627 return PTR_ERR(out_skb);
2629 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2633 out_hdr = (struct sadb_msg *) out_skb->data;
2634 out_hdr->sadb_msg_version = pfk->dump.msg_version;
2635 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2636 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2637 out_hdr->sadb_msg_errno = 0;
2638 out_hdr->sadb_msg_seq = count + 1;
2639 out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
2642 pfkey_broadcast(pfk->dump.skb, BROADCAST_ONE,
2643 &pfk->sk, sock_net(&pfk->sk));
2644 pfk->dump.skb = out_skb;
2649 static int pfkey_dump_sp(struct pfkey_sock *pfk)
2651 struct net *net = sock_net(&pfk->sk);
2652 return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2655 static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2657 xfrm_policy_walk_done(&pfk->dump.u.policy);
2660 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2662 struct pfkey_sock *pfk = pfkey_sk(sk);
2664 if (pfk->dump.dump != NULL)
2667 pfk->dump.msg_version = hdr->sadb_msg_version;
2668 pfk->dump.msg_pid = hdr->sadb_msg_pid;
2669 pfk->dump.dump = pfkey_dump_sp;
2670 pfk->dump.done = pfkey_dump_sp_done;
2671 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2673 return pfkey_do_dump(pfk);
2676 static int key_notify_policy_flush(const struct km_event *c)
2678 struct sk_buff *skb_out;
2679 struct sadb_msg *hdr;
2681 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2684 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2685 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2686 hdr->sadb_msg_seq = c->seq;
2687 hdr->sadb_msg_pid = c->pid;
2688 hdr->sadb_msg_version = PF_KEY_V2;
2689 hdr->sadb_msg_errno = (uint8_t) 0;
2690 hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2691 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2692 hdr->sadb_msg_reserved = 0;
2693 pfkey_broadcast(skb_out, BROADCAST_ALL, NULL, c->net);
2698 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2700 struct net *net = sock_net(sk);
2702 struct xfrm_audit audit_info;
2705 audit_info.loginuid = audit_get_loginuid(current);
2706 audit_info.sessionid = audit_get_sessionid(current);
2707 audit_info.secid = 0;
2708 err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info);
2709 err2 = unicast_flush_resp(sk, hdr);
2711 if (err == -ESRCH) /* empty table - old silent behavior */
2716 c.data.type = XFRM_POLICY_TYPE_MAIN;
2717 c.event = XFRM_MSG_FLUSHPOLICY;
2718 c.pid = hdr->sadb_msg_pid;
2719 c.seq = hdr->sadb_msg_seq;
2721 km_policy_notify(NULL, 0, &c);
2726 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2727 const struct sadb_msg *hdr, void * const *ext_hdrs);
2728 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2729 [SADB_RESERVED] = pfkey_reserved,
2730 [SADB_GETSPI] = pfkey_getspi,
2731 [SADB_UPDATE] = pfkey_add,
2732 [SADB_ADD] = pfkey_add,
2733 [SADB_DELETE] = pfkey_delete,
2734 [SADB_GET] = pfkey_get,
2735 [SADB_ACQUIRE] = pfkey_acquire,
2736 [SADB_REGISTER] = pfkey_register,
2737 [SADB_EXPIRE] = NULL,
2738 [SADB_FLUSH] = pfkey_flush,
2739 [SADB_DUMP] = pfkey_dump,
2740 [SADB_X_PROMISC] = pfkey_promisc,
2741 [SADB_X_PCHANGE] = NULL,
2742 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2743 [SADB_X_SPDADD] = pfkey_spdadd,
2744 [SADB_X_SPDDELETE] = pfkey_spddelete,
2745 [SADB_X_SPDGET] = pfkey_spdget,
2746 [SADB_X_SPDACQUIRE] = NULL,
2747 [SADB_X_SPDDUMP] = pfkey_spddump,
2748 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2749 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2750 [SADB_X_SPDDELETE2] = pfkey_spdget,
2751 [SADB_X_MIGRATE] = pfkey_migrate,
2754 static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
2756 void *ext_hdrs[SADB_EXT_MAX];
2759 pfkey_broadcast(skb_clone(skb, GFP_KERNEL),
2760 BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
2762 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2763 err = parse_exthdrs(skb, hdr, ext_hdrs);
2766 if (pfkey_funcs[hdr->sadb_msg_type])
2767 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2772 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2774 struct sadb_msg *hdr = NULL;
2776 if (skb->len < sizeof(*hdr)) {
2779 hdr = (struct sadb_msg *) skb->data;
2780 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2781 hdr->sadb_msg_reserved != 0 ||
2782 (hdr->sadb_msg_type <= SADB_RESERVED ||
2783 hdr->sadb_msg_type > SADB_MAX)) {
2786 } else if (hdr->sadb_msg_len != (skb->len /
2787 sizeof(uint64_t)) ||
2788 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2789 sizeof(uint64_t))) {
2799 static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2800 const struct xfrm_algo_desc *d)
2802 unsigned int id = d->desc.sadb_alg_id;
2804 if (id >= sizeof(t->aalgos) * 8)
2807 return (t->aalgos >> id) & 1;
2810 static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2811 const struct xfrm_algo_desc *d)
2813 unsigned int id = d->desc.sadb_alg_id;
2815 if (id >= sizeof(t->ealgos) * 8)
2818 return (t->ealgos >> id) & 1;
2821 static int count_ah_combs(const struct xfrm_tmpl *t)
2825 for (i = 0; ; i++) {
2826 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2829 if (aalg_tmpl_set(t, aalg) && aalg->available)
2830 sz += sizeof(struct sadb_comb);
2832 return sz + sizeof(struct sadb_prop);
2835 static int count_esp_combs(const struct xfrm_tmpl *t)
2839 for (i = 0; ; i++) {
2840 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2844 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2847 for (k = 1; ; k++) {
2848 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2852 if (aalg_tmpl_set(t, aalg) && aalg->available)
2853 sz += sizeof(struct sadb_comb);
2856 return sz + sizeof(struct sadb_prop);
2859 static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2861 struct sadb_prop *p;
2864 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2865 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2866 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2867 p->sadb_prop_replay = 32;
2868 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2870 for (i = 0; ; i++) {
2871 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2875 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2876 struct sadb_comb *c;
2877 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2878 memset(c, 0, sizeof(*c));
2879 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2880 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2881 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2882 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2883 c->sadb_comb_hard_addtime = 24*60*60;
2884 c->sadb_comb_soft_addtime = 20*60*60;
2885 c->sadb_comb_hard_usetime = 8*60*60;
2886 c->sadb_comb_soft_usetime = 7*60*60;
2891 static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2893 struct sadb_prop *p;
2896 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2897 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2898 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2899 p->sadb_prop_replay = 32;
2900 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2903 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2907 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2910 for (k = 1; ; k++) {
2911 struct sadb_comb *c;
2912 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2915 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2917 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2918 memset(c, 0, sizeof(*c));
2919 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2920 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2921 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2922 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2923 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2924 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2925 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2926 c->sadb_comb_hard_addtime = 24*60*60;
2927 c->sadb_comb_soft_addtime = 20*60*60;
2928 c->sadb_comb_hard_usetime = 8*60*60;
2929 c->sadb_comb_soft_usetime = 7*60*60;
2934 static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
2939 static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
2941 struct sk_buff *out_skb;
2942 struct sadb_msg *out_hdr;
2946 hard = c->data.hard;
2952 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
2953 if (IS_ERR(out_skb))
2954 return PTR_ERR(out_skb);
2956 out_hdr = (struct sadb_msg *) out_skb->data;
2957 out_hdr->sadb_msg_version = PF_KEY_V2;
2958 out_hdr->sadb_msg_type = SADB_EXPIRE;
2959 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2960 out_hdr->sadb_msg_errno = 0;
2961 out_hdr->sadb_msg_reserved = 0;
2962 out_hdr->sadb_msg_seq = 0;
2963 out_hdr->sadb_msg_pid = 0;
2965 pfkey_broadcast(out_skb, BROADCAST_REGISTERED, NULL, xs_net(x));
2969 static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
2971 struct net *net = x ? xs_net(x) : c->net;
2972 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
2974 if (atomic_read(&net_pfkey->socks_nr) == 0)
2978 case XFRM_MSG_EXPIRE:
2979 return key_notify_sa_expire(x, c);
2980 case XFRM_MSG_DELSA:
2981 case XFRM_MSG_NEWSA:
2982 case XFRM_MSG_UPDSA:
2983 return key_notify_sa(x, c);
2984 case XFRM_MSG_FLUSHSA:
2985 return key_notify_sa_flush(c);
2986 case XFRM_MSG_NEWAE: /* not yet supported */
2989 pr_err("pfkey: Unknown SA event %d\n", c->event);
2996 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2998 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3002 case XFRM_MSG_POLEXPIRE:
3003 return key_notify_policy_expire(xp, c);
3004 case XFRM_MSG_DELPOLICY:
3005 case XFRM_MSG_NEWPOLICY:
3006 case XFRM_MSG_UPDPOLICY:
3007 return key_notify_policy(xp, dir, c);
3008 case XFRM_MSG_FLUSHPOLICY:
3009 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3011 return key_notify_policy_flush(c);
3013 pr_err("pfkey: Unknown policy event %d\n", c->event);
3020 static u32 get_acqseq(void)
3023 static atomic_t acqseq;
3026 res = atomic_inc_return(&acqseq);
3031 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
3033 struct sk_buff *skb;
3034 struct sadb_msg *hdr;
3035 struct sadb_address *addr;
3036 struct sadb_x_policy *pol;
3039 struct sadb_x_sec_ctx *sec_ctx;
3040 struct xfrm_sec_ctx *xfrm_ctx;
3043 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3047 size = sizeof(struct sadb_msg) +
3048 (sizeof(struct sadb_address) * 2) +
3049 (sockaddr_size * 2) +
3050 sizeof(struct sadb_x_policy);
3052 if (x->id.proto == IPPROTO_AH)
3053 size += count_ah_combs(t);
3054 else if (x->id.proto == IPPROTO_ESP)
3055 size += count_esp_combs(t);
3057 if ((xfrm_ctx = x->security)) {
3058 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3059 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3062 skb = alloc_skb(size + 16, GFP_ATOMIC);
3066 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3067 hdr->sadb_msg_version = PF_KEY_V2;
3068 hdr->sadb_msg_type = SADB_ACQUIRE;
3069 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3070 hdr->sadb_msg_len = size / sizeof(uint64_t);
3071 hdr->sadb_msg_errno = 0;
3072 hdr->sadb_msg_reserved = 0;
3073 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3074 hdr->sadb_msg_pid = 0;
3077 addr = (struct sadb_address*) skb_put(skb,
3078 sizeof(struct sadb_address)+sockaddr_size);
3079 addr->sadb_address_len =
3080 (sizeof(struct sadb_address)+sockaddr_size)/
3082 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3083 addr->sadb_address_proto = 0;
3084 addr->sadb_address_reserved = 0;
3085 addr->sadb_address_prefixlen =
3086 pfkey_sockaddr_fill(&x->props.saddr, 0,
3087 (struct sockaddr *) (addr + 1),
3089 if (!addr->sadb_address_prefixlen)
3093 addr = (struct sadb_address*) skb_put(skb,
3094 sizeof(struct sadb_address)+sockaddr_size);
3095 addr->sadb_address_len =
3096 (sizeof(struct sadb_address)+sockaddr_size)/
3098 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3099 addr->sadb_address_proto = 0;
3100 addr->sadb_address_reserved = 0;
3101 addr->sadb_address_prefixlen =
3102 pfkey_sockaddr_fill(&x->id.daddr, 0,
3103 (struct sockaddr *) (addr + 1),
3105 if (!addr->sadb_address_prefixlen)
3108 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3109 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3110 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3111 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3112 pol->sadb_x_policy_dir = dir+1;
3113 pol->sadb_x_policy_reserved = 0;
3114 pol->sadb_x_policy_id = xp->index;
3115 pol->sadb_x_policy_priority = xp->priority;
3117 /* Set sadb_comb's. */
3118 if (x->id.proto == IPPROTO_AH)
3119 dump_ah_combs(skb, t);
3120 else if (x->id.proto == IPPROTO_ESP)
3121 dump_esp_combs(skb, t);
3123 /* security context */
3125 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3126 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3127 sec_ctx->sadb_x_sec_len =
3128 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3129 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3130 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3131 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3132 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3133 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3137 return pfkey_broadcast(skb, BROADCAST_REGISTERED, NULL, xs_net(x));
3140 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3141 u8 *data, int len, int *dir)
3143 struct net *net = sock_net(sk);
3144 struct xfrm_policy *xp;
3145 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3146 struct sadb_x_sec_ctx *sec_ctx;
3148 switch (sk->sk_family) {
3150 if (opt != IP_IPSEC_POLICY) {
3155 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3157 if (opt != IPV6_IPSEC_POLICY) {
3170 if (len < sizeof(struct sadb_x_policy) ||
3171 pol->sadb_x_policy_len*8 > len ||
3172 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3173 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3176 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3182 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3183 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3185 xp->lft.soft_byte_limit = XFRM_INF;
3186 xp->lft.hard_byte_limit = XFRM_INF;
3187 xp->lft.soft_packet_limit = XFRM_INF;
3188 xp->lft.hard_packet_limit = XFRM_INF;
3189 xp->family = sk->sk_family;
3192 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3193 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3196 /* security context too */
3197 if (len >= (pol->sadb_x_policy_len*8 +
3198 sizeof(struct sadb_x_sec_ctx))) {
3199 char *p = (char *)pol;
3200 struct xfrm_user_sec_ctx *uctx;
3202 p += pol->sadb_x_policy_len*8;
3203 sec_ctx = (struct sadb_x_sec_ctx *)p;
3204 if (len < pol->sadb_x_policy_len*8 +
3205 sec_ctx->sadb_x_sec_len) {
3209 if ((*dir = verify_sec_ctx_len(p)))
3211 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3212 *dir = security_xfrm_policy_alloc(&xp->security, uctx);
3219 *dir = pol->sadb_x_policy_dir-1;
3224 xfrm_policy_destroy(xp);
3228 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3230 struct sk_buff *skb;
3231 struct sadb_msg *hdr;
3233 struct sadb_address *addr;
3234 struct sadb_x_nat_t_port *n_port;
3237 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3238 struct xfrm_encap_tmpl *natt = NULL;
3240 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3252 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3254 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3255 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3258 size = sizeof(struct sadb_msg) +
3259 sizeof(struct sadb_sa) +
3260 (sizeof(struct sadb_address) * 2) +
3261 (sockaddr_size * 2) +
3262 (sizeof(struct sadb_x_nat_t_port) * 2);
3264 skb = alloc_skb(size + 16, GFP_ATOMIC);
3268 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3269 hdr->sadb_msg_version = PF_KEY_V2;
3270 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3271 hdr->sadb_msg_satype = satype;
3272 hdr->sadb_msg_len = size / sizeof(uint64_t);
3273 hdr->sadb_msg_errno = 0;
3274 hdr->sadb_msg_reserved = 0;
3275 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3276 hdr->sadb_msg_pid = 0;
3279 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3280 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3281 sa->sadb_sa_exttype = SADB_EXT_SA;
3282 sa->sadb_sa_spi = x->id.spi;
3283 sa->sadb_sa_replay = 0;
3284 sa->sadb_sa_state = 0;
3285 sa->sadb_sa_auth = 0;
3286 sa->sadb_sa_encrypt = 0;
3287 sa->sadb_sa_flags = 0;
3289 /* ADDRESS_SRC (old addr) */
3290 addr = (struct sadb_address*)
3291 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3292 addr->sadb_address_len =
3293 (sizeof(struct sadb_address)+sockaddr_size)/
3295 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3296 addr->sadb_address_proto = 0;
3297 addr->sadb_address_reserved = 0;
3298 addr->sadb_address_prefixlen =
3299 pfkey_sockaddr_fill(&x->props.saddr, 0,
3300 (struct sockaddr *) (addr + 1),
3302 if (!addr->sadb_address_prefixlen)
3305 /* NAT_T_SPORT (old port) */
3306 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3307 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3308 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3309 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3310 n_port->sadb_x_nat_t_port_reserved = 0;
3312 /* ADDRESS_DST (new addr) */
3313 addr = (struct sadb_address*)
3314 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3315 addr->sadb_address_len =
3316 (sizeof(struct sadb_address)+sockaddr_size)/
3318 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3319 addr->sadb_address_proto = 0;
3320 addr->sadb_address_reserved = 0;
3321 addr->sadb_address_prefixlen =
3322 pfkey_sockaddr_fill(ipaddr, 0,
3323 (struct sockaddr *) (addr + 1),
3325 if (!addr->sadb_address_prefixlen)
3328 /* NAT_T_DPORT (new port) */
3329 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3330 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3331 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3332 n_port->sadb_x_nat_t_port_port = sport;
3333 n_port->sadb_x_nat_t_port_reserved = 0;
3335 return pfkey_broadcast(skb, BROADCAST_REGISTERED, NULL, xs_net(x));
3338 #ifdef CONFIG_NET_KEY_MIGRATE
3339 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3340 const struct xfrm_selector *sel)
3342 struct sadb_address *addr;
3343 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3344 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3345 addr->sadb_address_exttype = type;
3346 addr->sadb_address_proto = sel->proto;
3347 addr->sadb_address_reserved = 0;
3350 case SADB_EXT_ADDRESS_SRC:
3351 addr->sadb_address_prefixlen = sel->prefixlen_s;
3352 pfkey_sockaddr_fill(&sel->saddr, 0,
3353 (struct sockaddr *)(addr + 1),
3356 case SADB_EXT_ADDRESS_DST:
3357 addr->sadb_address_prefixlen = sel->prefixlen_d;
3358 pfkey_sockaddr_fill(&sel->daddr, 0,
3359 (struct sockaddr *)(addr + 1),
3370 static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
3372 struct sadb_x_kmaddress *kma;
3374 int family = k->family;
3375 int socklen = pfkey_sockaddr_len(family);
3378 size_req = (sizeof(struct sadb_x_kmaddress) +
3379 pfkey_sockaddr_pair_size(family));
3381 kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req);
3382 memset(kma, 0, size_req);
3383 kma->sadb_x_kmaddress_len = size_req / 8;
3384 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3385 kma->sadb_x_kmaddress_reserved = k->reserved;
3387 sa = (u8 *)(kma + 1);
3388 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3389 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3395 static int set_ipsecrequest(struct sk_buff *skb,
3396 uint8_t proto, uint8_t mode, int level,
3397 uint32_t reqid, uint8_t family,
3398 const xfrm_address_t *src, const xfrm_address_t *dst)
3400 struct sadb_x_ipsecrequest *rq;
3402 int socklen = pfkey_sockaddr_len(family);
3405 size_req = sizeof(struct sadb_x_ipsecrequest) +
3406 pfkey_sockaddr_pair_size(family);
3408 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3409 memset(rq, 0, size_req);
3410 rq->sadb_x_ipsecrequest_len = size_req;
3411 rq->sadb_x_ipsecrequest_proto = proto;
3412 rq->sadb_x_ipsecrequest_mode = mode;
3413 rq->sadb_x_ipsecrequest_level = level;
3414 rq->sadb_x_ipsecrequest_reqid = reqid;
3416 sa = (u8 *) (rq + 1);
3417 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3418 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3425 #ifdef CONFIG_NET_KEY_MIGRATE
3426 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3427 const struct xfrm_migrate *m, int num_bundles,
3428 const struct xfrm_kmaddress *k)
3434 struct sk_buff *skb;
3435 struct sadb_msg *hdr;
3436 struct sadb_x_policy *pol;
3437 const struct xfrm_migrate *mp;
3439 if (type != XFRM_POLICY_TYPE_MAIN)
3442 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3446 /* addresses for KM */
3447 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3448 pfkey_sockaddr_pair_size(k->family));
3452 sasize_sel = pfkey_sockaddr_size(sel->family);
3455 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3458 size_pol += sizeof(struct sadb_x_policy);
3461 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3462 /* old locator pair */
3463 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3464 pfkey_sockaddr_pair_size(mp->old_family);
3465 /* new locator pair */
3466 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3467 pfkey_sockaddr_pair_size(mp->new_family);
3470 size += sizeof(struct sadb_msg) + size_pol;
3473 skb = alloc_skb(size, GFP_ATOMIC);
3477 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3478 hdr->sadb_msg_version = PF_KEY_V2;
3479 hdr->sadb_msg_type = SADB_X_MIGRATE;
3480 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3481 hdr->sadb_msg_len = size / 8;
3482 hdr->sadb_msg_errno = 0;
3483 hdr->sadb_msg_reserved = 0;
3484 hdr->sadb_msg_seq = 0;
3485 hdr->sadb_msg_pid = 0;
3487 /* Addresses to be used by KM for negotiation, if ext is available */
3488 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3492 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3495 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3497 /* policy information */
3498 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3499 pol->sadb_x_policy_len = size_pol / 8;
3500 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3501 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3502 pol->sadb_x_policy_dir = dir + 1;
3503 pol->sadb_x_policy_reserved = 0;
3504 pol->sadb_x_policy_id = 0;
3505 pol->sadb_x_policy_priority = 0;
3507 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3508 /* old ipsecrequest */
3509 int mode = pfkey_mode_from_xfrm(mp->mode);
3512 if (set_ipsecrequest(skb, mp->proto, mode,
3513 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3514 mp->reqid, mp->old_family,
3515 &mp->old_saddr, &mp->old_daddr) < 0)
3518 /* new ipsecrequest */
3519 if (set_ipsecrequest(skb, mp->proto, mode,
3520 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3521 mp->reqid, mp->new_family,
3522 &mp->new_saddr, &mp->new_daddr) < 0)
3526 /* broadcast migrate message to sockets */
3527 pfkey_broadcast(skb, BROADCAST_ALL, NULL, &init_net);
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)
3540 return -ENOPROTOOPT;
3544 static int pfkey_sendmsg(struct kiocb *kiocb,
3545 struct socket *sock, struct msghdr *msg, size_t len)
3547 struct sock *sk = sock->sk;
3548 struct sk_buff *skb = NULL;
3549 struct sadb_msg *hdr = NULL;
3553 if (msg->msg_flags & MSG_OOB)
3557 if ((unsigned)len > sk->sk_sndbuf - 32)
3561 skb = alloc_skb(len, GFP_KERNEL);
3566 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3569 hdr = pfkey_get_base_msg(skb, &err);
3573 mutex_lock(&xfrm_cfg_mutex);
3574 err = pfkey_process(sk, skb, hdr);
3575 mutex_unlock(&xfrm_cfg_mutex);
3578 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3585 static int pfkey_recvmsg(struct kiocb *kiocb,
3586 struct socket *sock, struct msghdr *msg, size_t len,
3589 struct sock *sk = sock->sk;
3590 struct pfkey_sock *pfk = pfkey_sk(sk);
3591 struct sk_buff *skb;
3595 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3598 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3604 msg->msg_flags |= MSG_TRUNC;
3608 skb_reset_transport_header(skb);
3609 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3613 sock_recv_ts_and_drops(msg, sk, skb);
3615 err = (flags & MSG_TRUNC) ? skb->len : copied;
3617 if (pfk->dump.dump != NULL &&
3618 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3622 skb_free_datagram(sk, skb);
3627 static const struct proto_ops pfkey_ops = {
3629 .owner = THIS_MODULE,
3630 /* Operations that make no sense on pfkey sockets. */
3631 .bind = sock_no_bind,
3632 .connect = sock_no_connect,
3633 .socketpair = sock_no_socketpair,
3634 .accept = sock_no_accept,
3635 .getname = sock_no_getname,
3636 .ioctl = sock_no_ioctl,
3637 .listen = sock_no_listen,
3638 .shutdown = sock_no_shutdown,
3639 .setsockopt = sock_no_setsockopt,
3640 .getsockopt = sock_no_getsockopt,
3641 .mmap = sock_no_mmap,
3642 .sendpage = sock_no_sendpage,
3644 /* Now the operations that really occur. */
3645 .release = pfkey_release,
3646 .poll = datagram_poll,
3647 .sendmsg = pfkey_sendmsg,
3648 .recvmsg = pfkey_recvmsg,
3651 static const struct net_proto_family pfkey_family_ops = {
3653 .create = pfkey_create,
3654 .owner = THIS_MODULE,
3657 #ifdef CONFIG_PROC_FS
3658 static int pfkey_seq_show(struct seq_file *f, void *v)
3660 struct sock *s = sk_entry(v);
3662 if (v == SEQ_START_TOKEN)
3663 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3665 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
3667 atomic_read(&s->sk_refcnt),
3668 sk_rmem_alloc_get(s),
3669 sk_wmem_alloc_get(s),
3676 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3679 struct net *net = seq_file_net(f);
3680 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3683 return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
3686 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3688 struct net *net = seq_file_net(f);
3689 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3691 return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
3694 static void pfkey_seq_stop(struct seq_file *f, void *v)
3700 static const struct seq_operations pfkey_seq_ops = {
3701 .start = pfkey_seq_start,
3702 .next = pfkey_seq_next,
3703 .stop = pfkey_seq_stop,
3704 .show = pfkey_seq_show,
3707 static int pfkey_seq_open(struct inode *inode, struct file *file)
3709 return seq_open_net(inode, file, &pfkey_seq_ops,
3710 sizeof(struct seq_net_private));
3713 static const struct file_operations pfkey_proc_ops = {
3714 .open = pfkey_seq_open,
3716 .llseek = seq_lseek,
3717 .release = seq_release_net,
3720 static int __net_init pfkey_init_proc(struct net *net)
3722 struct proc_dir_entry *e;
3724 e = proc_net_fops_create(net, "pfkey", 0, &pfkey_proc_ops);
3731 static void __net_exit pfkey_exit_proc(struct net *net)
3733 proc_net_remove(net, "pfkey");
3736 static inline int pfkey_init_proc(struct net *net)
3741 static inline void pfkey_exit_proc(struct net *net)
3746 static struct xfrm_mgr pfkeyv2_mgr =
3749 .notify = pfkey_send_notify,
3750 .acquire = pfkey_send_acquire,
3751 .compile_policy = pfkey_compile_policy,
3752 .new_mapping = pfkey_send_new_mapping,
3753 .notify_policy = pfkey_send_policy_notify,
3754 .migrate = pfkey_send_migrate,
3757 static int __net_init pfkey_net_init(struct net *net)
3759 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3762 INIT_HLIST_HEAD(&net_pfkey->table);
3763 atomic_set(&net_pfkey->socks_nr, 0);
3765 rv = pfkey_init_proc(net);
3770 static void __net_exit pfkey_net_exit(struct net *net)
3772 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3774 pfkey_exit_proc(net);
3775 BUG_ON(!hlist_empty(&net_pfkey->table));
3778 static struct pernet_operations pfkey_net_ops = {
3779 .init = pfkey_net_init,
3780 .exit = pfkey_net_exit,
3781 .id = &pfkey_net_id,
3782 .size = sizeof(struct netns_pfkey),
3785 static void __exit ipsec_pfkey_exit(void)
3787 xfrm_unregister_km(&pfkeyv2_mgr);
3788 sock_unregister(PF_KEY);
3789 unregister_pernet_subsys(&pfkey_net_ops);
3790 proto_unregister(&key_proto);
3793 static int __init ipsec_pfkey_init(void)
3795 int err = proto_register(&key_proto, 0);
3800 err = register_pernet_subsys(&pfkey_net_ops);
3802 goto out_unregister_key_proto;
3803 err = sock_register(&pfkey_family_ops);
3805 goto out_unregister_pernet;
3806 err = xfrm_register_km(&pfkeyv2_mgr);
3808 goto out_sock_unregister;
3812 out_sock_unregister:
3813 sock_unregister(PF_KEY);
3814 out_unregister_pernet:
3815 unregister_pernet_subsys(&pfkey_net_ops);
3816 out_unregister_key_proto:
3817 proto_unregister(&key_proto);
3821 module_init(ipsec_pfkey_init);
3822 module_exit(ipsec_pfkey_exit);
3823 MODULE_LICENSE("GPL");
3824 MODULE_ALIAS_NETPROTO(PF_KEY);