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, gfp_t allocation,
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, allocation, 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, allocation, 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, allocation, 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, GFP_ATOMIC, 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, GFP_KERNEL, 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 IS_ENABLED(CONFIG_IPV6)
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 IS_ENABLED(CONFIG_IPV6)
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 IS_ENABLED(CONFIG_IPV6)
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 IS_ENABLED(CONFIG_IPV6)
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 IS_ENABLED(CONFIG_IPV6)
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 IS_ENABLED(CONFIG_IPV6)
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 IS_ENABLED(CONFIG_IPV6)
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 sin6->sin6_addr = *(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 IS_ENABLED(CONFIG_IPV6)
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, GFP_KERNEL, 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, GFP_ATOMIC, 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, GFP_ATOMIC, 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, GFP_KERNEL, 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, GFP_ATOMIC, 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));
1709 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
1714 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1716 struct net *net = sock_net(sk);
1719 struct xfrm_audit audit_info;
1722 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1726 audit_info.loginuid = audit_get_loginuid(current);
1727 audit_info.sessionid = audit_get_sessionid(current);
1728 audit_info.secid = 0;
1729 err = xfrm_state_flush(net, proto, &audit_info);
1730 err2 = unicast_flush_resp(sk, hdr);
1732 if (err == -ESRCH) /* empty table - go quietly */
1734 return err ? err : err2;
1737 c.data.proto = proto;
1738 c.seq = hdr->sadb_msg_seq;
1739 c.pid = hdr->sadb_msg_pid;
1740 c.event = XFRM_MSG_FLUSHSA;
1742 km_state_notify(NULL, &c);
1747 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1749 struct pfkey_sock *pfk = ptr;
1750 struct sk_buff *out_skb;
1751 struct sadb_msg *out_hdr;
1753 if (!pfkey_can_dump(&pfk->sk))
1756 out_skb = pfkey_xfrm_state2msg(x);
1757 if (IS_ERR(out_skb))
1758 return PTR_ERR(out_skb);
1760 out_hdr = (struct sadb_msg *) out_skb->data;
1761 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1762 out_hdr->sadb_msg_type = SADB_DUMP;
1763 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1764 out_hdr->sadb_msg_errno = 0;
1765 out_hdr->sadb_msg_reserved = 0;
1766 out_hdr->sadb_msg_seq = count + 1;
1767 out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
1770 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
1771 &pfk->sk, sock_net(&pfk->sk));
1772 pfk->dump.skb = out_skb;
1777 static int pfkey_dump_sa(struct pfkey_sock *pfk)
1779 struct net *net = sock_net(&pfk->sk);
1780 return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1783 static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1785 xfrm_state_walk_done(&pfk->dump.u.state);
1788 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1791 struct pfkey_sock *pfk = pfkey_sk(sk);
1793 if (pfk->dump.dump != NULL)
1796 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1800 pfk->dump.msg_version = hdr->sadb_msg_version;
1801 pfk->dump.msg_pid = hdr->sadb_msg_pid;
1802 pfk->dump.dump = pfkey_dump_sa;
1803 pfk->dump.done = pfkey_dump_sa_done;
1804 xfrm_state_walk_init(&pfk->dump.u.state, proto);
1806 return pfkey_do_dump(pfk);
1809 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1811 struct pfkey_sock *pfk = pfkey_sk(sk);
1812 int satype = hdr->sadb_msg_satype;
1813 bool reset_errno = false;
1815 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1817 if (satype != 0 && satype != 1)
1819 pfk->promisc = satype;
1821 if (reset_errno && skb_cloned(skb))
1822 skb = skb_copy(skb, GFP_KERNEL);
1824 skb = skb_clone(skb, GFP_KERNEL);
1826 if (reset_errno && skb) {
1827 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1828 new_hdr->sadb_msg_errno = 0;
1831 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
1835 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1838 u32 reqid = *(u32*)ptr;
1840 for (i=0; i<xp->xfrm_nr; i++) {
1841 if (xp->xfrm_vec[i].reqid == reqid)
1847 static u32 gen_reqid(struct net *net)
1849 struct xfrm_policy_walk walk;
1852 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1858 reqid = IPSEC_MANUAL_REQID_MAX+1;
1859 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1860 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1861 xfrm_policy_walk_done(&walk);
1864 } while (reqid != start);
1869 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1871 struct net *net = xp_net(xp);
1872 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1875 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1878 if (rq->sadb_x_ipsecrequest_mode == 0)
1881 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1882 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1885 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1887 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1888 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1889 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1891 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1895 /* addresses present only in tunnel mode */
1896 if (t->mode == XFRM_MODE_TUNNEL) {
1897 u8 *sa = (u8 *) (rq + 1);
1898 int family, socklen;
1900 family = pfkey_sockaddr_extract((struct sockaddr *)sa,
1905 socklen = pfkey_sockaddr_len(family);
1906 if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen),
1907 &t->id.daddr) != family)
1909 t->encap_family = family;
1911 t->encap_family = xp->family;
1913 /* No way to set this via kame pfkey */
1920 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1923 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1924 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1926 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1927 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1929 len -= rq->sadb_x_ipsecrequest_len;
1930 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1935 static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
1937 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1940 int len = sizeof(struct sadb_x_sec_ctx);
1941 len += xfrm_ctx->ctx_len;
1942 return PFKEY_ALIGN8(len);
1947 static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
1949 const struct xfrm_tmpl *t;
1950 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1954 for (i=0; i<xp->xfrm_nr; i++) {
1955 t = xp->xfrm_vec + i;
1956 socklen += pfkey_sockaddr_len(t->encap_family);
1959 return sizeof(struct sadb_msg) +
1960 (sizeof(struct sadb_lifetime) * 3) +
1961 (sizeof(struct sadb_address) * 2) +
1962 (sockaddr_size * 2) +
1963 sizeof(struct sadb_x_policy) +
1964 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1966 pfkey_xfrm_policy2sec_ctx_size(xp);
1969 static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
1971 struct sk_buff *skb;
1974 size = pfkey_xfrm_policy2msg_size(xp);
1976 skb = alloc_skb(size + 16, GFP_ATOMIC);
1978 return ERR_PTR(-ENOBUFS);
1983 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
1985 struct sadb_msg *hdr;
1986 struct sadb_address *addr;
1987 struct sadb_lifetime *lifetime;
1988 struct sadb_x_policy *pol;
1989 struct sadb_x_sec_ctx *sec_ctx;
1990 struct xfrm_sec_ctx *xfrm_ctx;
1993 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1994 int socklen = pfkey_sockaddr_len(xp->family);
1996 size = pfkey_xfrm_policy2msg_size(xp);
1998 /* call should fill header later */
1999 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2000 memset(hdr, 0, size); /* XXX do we need this ? */
2003 addr = (struct sadb_address*) skb_put(skb,
2004 sizeof(struct sadb_address)+sockaddr_size);
2005 addr->sadb_address_len =
2006 (sizeof(struct sadb_address)+sockaddr_size)/
2008 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2009 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2010 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2011 addr->sadb_address_reserved = 0;
2012 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2014 (struct sockaddr *) (addr + 1),
2019 addr = (struct sadb_address*) skb_put(skb,
2020 sizeof(struct sadb_address)+sockaddr_size);
2021 addr->sadb_address_len =
2022 (sizeof(struct sadb_address)+sockaddr_size)/
2024 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2025 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2026 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2027 addr->sadb_address_reserved = 0;
2029 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2030 (struct sockaddr *) (addr + 1),
2034 lifetime = (struct sadb_lifetime *) skb_put(skb,
2035 sizeof(struct sadb_lifetime));
2036 lifetime->sadb_lifetime_len =
2037 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2038 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2039 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2040 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2041 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2042 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2044 lifetime = (struct sadb_lifetime *) skb_put(skb,
2045 sizeof(struct sadb_lifetime));
2046 lifetime->sadb_lifetime_len =
2047 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2048 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2049 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2050 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2051 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2052 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2054 lifetime = (struct sadb_lifetime *) skb_put(skb,
2055 sizeof(struct sadb_lifetime));
2056 lifetime->sadb_lifetime_len =
2057 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2058 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2059 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2060 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2061 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2062 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2064 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2065 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2066 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2067 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2068 if (xp->action == XFRM_POLICY_ALLOW) {
2070 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2072 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2074 pol->sadb_x_policy_dir = dir+1;
2075 pol->sadb_x_policy_id = xp->index;
2076 pol->sadb_x_policy_priority = xp->priority;
2078 for (i=0; i<xp->xfrm_nr; i++) {
2079 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
2080 struct sadb_x_ipsecrequest *rq;
2084 req_size = sizeof(struct sadb_x_ipsecrequest);
2085 if (t->mode == XFRM_MODE_TUNNEL) {
2086 socklen = pfkey_sockaddr_len(t->encap_family);
2087 req_size += socklen * 2;
2091 rq = (void*)skb_put(skb, req_size);
2092 pol->sadb_x_policy_len += req_size/8;
2093 memset(rq, 0, sizeof(*rq));
2094 rq->sadb_x_ipsecrequest_len = req_size;
2095 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2096 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2098 rq->sadb_x_ipsecrequest_mode = mode;
2099 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2101 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2103 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2104 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2106 if (t->mode == XFRM_MODE_TUNNEL) {
2107 u8 *sa = (void *)(rq + 1);
2108 pfkey_sockaddr_fill(&t->saddr, 0,
2109 (struct sockaddr *)sa,
2111 pfkey_sockaddr_fill(&t->id.daddr, 0,
2112 (struct sockaddr *) (sa + socklen),
2117 /* security context */
2118 if ((xfrm_ctx = xp->security)) {
2119 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2121 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2122 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2123 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2124 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2125 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2126 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2127 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2131 hdr->sadb_msg_len = size / sizeof(uint64_t);
2132 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2137 static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2139 struct sk_buff *out_skb;
2140 struct sadb_msg *out_hdr;
2143 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2144 if (IS_ERR(out_skb))
2145 return PTR_ERR(out_skb);
2147 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2151 out_hdr = (struct sadb_msg *) out_skb->data;
2152 out_hdr->sadb_msg_version = PF_KEY_V2;
2154 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2155 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2157 out_hdr->sadb_msg_type = event2poltype(c->event);
2158 out_hdr->sadb_msg_errno = 0;
2159 out_hdr->sadb_msg_seq = c->seq;
2160 out_hdr->sadb_msg_pid = c->pid;
2161 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
2166 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2168 struct net *net = sock_net(sk);
2170 struct sadb_lifetime *lifetime;
2171 struct sadb_address *sa;
2172 struct sadb_x_policy *pol;
2173 struct xfrm_policy *xp;
2175 struct sadb_x_sec_ctx *sec_ctx;
2177 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2178 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2179 !ext_hdrs[SADB_X_EXT_POLICY-1])
2182 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2183 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2185 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2188 xp = xfrm_policy_alloc(net, GFP_KERNEL);
2192 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2193 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2194 xp->priority = pol->sadb_x_policy_priority;
2196 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2197 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2202 xp->selector.family = xp->family;
2203 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2204 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2205 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2206 if (xp->selector.sport)
2207 xp->selector.sport_mask = htons(0xffff);
2209 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2210 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2211 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2213 /* Amusing, we set this twice. KAME apps appear to set same value
2214 * in both addresses.
2216 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2218 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2219 if (xp->selector.dport)
2220 xp->selector.dport_mask = htons(0xffff);
2222 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2223 if (sec_ctx != NULL) {
2224 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2231 err = security_xfrm_policy_alloc(&xp->security, uctx);
2238 xp->lft.soft_byte_limit = XFRM_INF;
2239 xp->lft.hard_byte_limit = XFRM_INF;
2240 xp->lft.soft_packet_limit = XFRM_INF;
2241 xp->lft.hard_packet_limit = XFRM_INF;
2242 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2243 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2244 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2245 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2246 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2248 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2249 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2250 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2251 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2252 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2255 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2256 (err = parse_ipsecrequests(xp, pol)) < 0)
2259 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2260 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2262 xfrm_audit_policy_add(xp, err ? 0 : 1,
2263 audit_get_loginuid(current),
2264 audit_get_sessionid(current), 0);
2269 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2270 c.event = XFRM_MSG_UPDPOLICY;
2272 c.event = XFRM_MSG_NEWPOLICY;
2274 c.seq = hdr->sadb_msg_seq;
2275 c.pid = hdr->sadb_msg_pid;
2277 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2283 xfrm_policy_destroy(xp);
2287 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2289 struct net *net = sock_net(sk);
2291 struct sadb_address *sa;
2292 struct sadb_x_policy *pol;
2293 struct xfrm_policy *xp;
2294 struct xfrm_selector sel;
2296 struct sadb_x_sec_ctx *sec_ctx;
2297 struct xfrm_sec_ctx *pol_ctx = NULL;
2299 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2300 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2301 !ext_hdrs[SADB_X_EXT_POLICY-1])
2304 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2305 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2308 memset(&sel, 0, sizeof(sel));
2310 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2311 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2312 sel.prefixlen_s = sa->sadb_address_prefixlen;
2313 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2314 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2316 sel.sport_mask = htons(0xffff);
2318 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2319 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2320 sel.prefixlen_d = sa->sadb_address_prefixlen;
2321 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2322 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2324 sel.dport_mask = htons(0xffff);
2326 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2327 if (sec_ctx != NULL) {
2328 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2333 err = security_xfrm_policy_alloc(&pol_ctx, uctx);
2339 xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2340 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2342 security_xfrm_policy_free(pol_ctx);
2346 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2347 audit_get_loginuid(current),
2348 audit_get_sessionid(current), 0);
2353 c.seq = hdr->sadb_msg_seq;
2354 c.pid = hdr->sadb_msg_pid;
2356 c.event = XFRM_MSG_DELPOLICY;
2357 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2364 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
2367 struct sk_buff *out_skb;
2368 struct sadb_msg *out_hdr;
2371 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2372 if (IS_ERR(out_skb)) {
2373 err = PTR_ERR(out_skb);
2376 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2380 out_hdr = (struct sadb_msg *) out_skb->data;
2381 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2382 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2383 out_hdr->sadb_msg_satype = 0;
2384 out_hdr->sadb_msg_errno = 0;
2385 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2386 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2387 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
2394 #ifdef CONFIG_NET_KEY_MIGRATE
2395 static int pfkey_sockaddr_pair_size(sa_family_t family)
2397 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2400 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2401 xfrm_address_t *saddr, xfrm_address_t *daddr,
2406 if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2409 af = pfkey_sockaddr_extract(sa, saddr);
2413 socklen = pfkey_sockaddr_len(af);
2414 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2422 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2423 struct xfrm_migrate *m)
2426 struct sadb_x_ipsecrequest *rq2;
2429 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2430 len < rq1->sadb_x_ipsecrequest_len)
2434 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2435 rq1->sadb_x_ipsecrequest_len,
2436 &m->old_saddr, &m->old_daddr,
2441 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2442 len -= rq1->sadb_x_ipsecrequest_len;
2444 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2445 len < rq2->sadb_x_ipsecrequest_len)
2449 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2450 rq2->sadb_x_ipsecrequest_len,
2451 &m->new_saddr, &m->new_daddr,
2456 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2457 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2458 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2461 m->proto = rq1->sadb_x_ipsecrequest_proto;
2462 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2465 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2467 return ((int)(rq1->sadb_x_ipsecrequest_len +
2468 rq2->sadb_x_ipsecrequest_len));
2471 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2472 const struct sadb_msg *hdr, void * const *ext_hdrs)
2474 int i, len, ret, err = -EINVAL;
2476 struct sadb_address *sa;
2477 struct sadb_x_kmaddress *kma;
2478 struct sadb_x_policy *pol;
2479 struct sadb_x_ipsecrequest *rq;
2480 struct xfrm_selector sel;
2481 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2482 struct xfrm_kmaddress k;
2484 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2485 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2486 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2491 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2492 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2494 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2500 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2501 k.reserved = kma->sadb_x_kmaddress_reserved;
2502 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2503 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2504 &k.local, &k.remote, &k.family);
2511 dir = pol->sadb_x_policy_dir - 1;
2512 memset(&sel, 0, sizeof(sel));
2514 /* set source address info of selector */
2515 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2516 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2517 sel.prefixlen_s = sa->sadb_address_prefixlen;
2518 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2519 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2521 sel.sport_mask = htons(0xffff);
2523 /* set destination address info of selector */
2524 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2525 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2526 sel.prefixlen_d = sa->sadb_address_prefixlen;
2527 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2528 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2530 sel.dport_mask = htons(0xffff);
2532 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2534 /* extract ipsecrequests */
2536 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2538 while (len > 0 && i < XFRM_MAX_DEPTH) {
2539 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2544 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2550 if (!i || len > 0) {
2555 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2562 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2563 const struct sadb_msg *hdr, void * const *ext_hdrs)
2565 return -ENOPROTOOPT;
2570 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2572 struct net *net = sock_net(sk);
2574 int err = 0, delete;
2575 struct sadb_x_policy *pol;
2576 struct xfrm_policy *xp;
2579 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2582 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2583 if (dir >= XFRM_POLICY_MAX)
2586 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2587 xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2588 dir, pol->sadb_x_policy_id, delete, &err);
2593 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2594 audit_get_loginuid(current),
2595 audit_get_sessionid(current), 0);
2599 c.seq = hdr->sadb_msg_seq;
2600 c.pid = hdr->sadb_msg_pid;
2602 c.event = XFRM_MSG_DELPOLICY;
2603 km_policy_notify(xp, dir, &c);
2605 err = key_pol_get_resp(sk, xp, hdr, dir);
2613 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2615 struct pfkey_sock *pfk = ptr;
2616 struct sk_buff *out_skb;
2617 struct sadb_msg *out_hdr;
2620 if (!pfkey_can_dump(&pfk->sk))
2623 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2624 if (IS_ERR(out_skb))
2625 return PTR_ERR(out_skb);
2627 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2631 out_hdr = (struct sadb_msg *) out_skb->data;
2632 out_hdr->sadb_msg_version = pfk->dump.msg_version;
2633 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2634 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2635 out_hdr->sadb_msg_errno = 0;
2636 out_hdr->sadb_msg_seq = count + 1;
2637 out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
2640 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
2641 &pfk->sk, sock_net(&pfk->sk));
2642 pfk->dump.skb = out_skb;
2647 static int pfkey_dump_sp(struct pfkey_sock *pfk)
2649 struct net *net = sock_net(&pfk->sk);
2650 return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2653 static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2655 xfrm_policy_walk_done(&pfk->dump.u.policy);
2658 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2660 struct pfkey_sock *pfk = pfkey_sk(sk);
2662 if (pfk->dump.dump != NULL)
2665 pfk->dump.msg_version = hdr->sadb_msg_version;
2666 pfk->dump.msg_pid = hdr->sadb_msg_pid;
2667 pfk->dump.dump = pfkey_dump_sp;
2668 pfk->dump.done = pfkey_dump_sp_done;
2669 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2671 return pfkey_do_dump(pfk);
2674 static int key_notify_policy_flush(const struct km_event *c)
2676 struct sk_buff *skb_out;
2677 struct sadb_msg *hdr;
2679 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2682 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2683 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2684 hdr->sadb_msg_seq = c->seq;
2685 hdr->sadb_msg_pid = c->pid;
2686 hdr->sadb_msg_version = PF_KEY_V2;
2687 hdr->sadb_msg_errno = (uint8_t) 0;
2688 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2689 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
2694 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2696 struct net *net = sock_net(sk);
2698 struct xfrm_audit audit_info;
2701 audit_info.loginuid = audit_get_loginuid(current);
2702 audit_info.sessionid = audit_get_sessionid(current);
2703 audit_info.secid = 0;
2704 err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info);
2705 err2 = unicast_flush_resp(sk, hdr);
2707 if (err == -ESRCH) /* empty table - old silent behavior */
2712 c.data.type = XFRM_POLICY_TYPE_MAIN;
2713 c.event = XFRM_MSG_FLUSHPOLICY;
2714 c.pid = hdr->sadb_msg_pid;
2715 c.seq = hdr->sadb_msg_seq;
2717 km_policy_notify(NULL, 0, &c);
2722 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2723 const struct sadb_msg *hdr, void * const *ext_hdrs);
2724 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2725 [SADB_RESERVED] = pfkey_reserved,
2726 [SADB_GETSPI] = pfkey_getspi,
2727 [SADB_UPDATE] = pfkey_add,
2728 [SADB_ADD] = pfkey_add,
2729 [SADB_DELETE] = pfkey_delete,
2730 [SADB_GET] = pfkey_get,
2731 [SADB_ACQUIRE] = pfkey_acquire,
2732 [SADB_REGISTER] = pfkey_register,
2733 [SADB_EXPIRE] = NULL,
2734 [SADB_FLUSH] = pfkey_flush,
2735 [SADB_DUMP] = pfkey_dump,
2736 [SADB_X_PROMISC] = pfkey_promisc,
2737 [SADB_X_PCHANGE] = NULL,
2738 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2739 [SADB_X_SPDADD] = pfkey_spdadd,
2740 [SADB_X_SPDDELETE] = pfkey_spddelete,
2741 [SADB_X_SPDGET] = pfkey_spdget,
2742 [SADB_X_SPDACQUIRE] = NULL,
2743 [SADB_X_SPDDUMP] = pfkey_spddump,
2744 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2745 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2746 [SADB_X_SPDDELETE2] = pfkey_spdget,
2747 [SADB_X_MIGRATE] = pfkey_migrate,
2750 static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
2752 void *ext_hdrs[SADB_EXT_MAX];
2755 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2756 BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
2758 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2759 err = parse_exthdrs(skb, hdr, ext_hdrs);
2762 if (pfkey_funcs[hdr->sadb_msg_type])
2763 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2768 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2770 struct sadb_msg *hdr = NULL;
2772 if (skb->len < sizeof(*hdr)) {
2775 hdr = (struct sadb_msg *) skb->data;
2776 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2777 hdr->sadb_msg_reserved != 0 ||
2778 (hdr->sadb_msg_type <= SADB_RESERVED ||
2779 hdr->sadb_msg_type > SADB_MAX)) {
2782 } else if (hdr->sadb_msg_len != (skb->len /
2783 sizeof(uint64_t)) ||
2784 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2785 sizeof(uint64_t))) {
2795 static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2796 const struct xfrm_algo_desc *d)
2798 unsigned int id = d->desc.sadb_alg_id;
2800 if (id >= sizeof(t->aalgos) * 8)
2803 return (t->aalgos >> id) & 1;
2806 static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2807 const struct xfrm_algo_desc *d)
2809 unsigned int id = d->desc.sadb_alg_id;
2811 if (id >= sizeof(t->ealgos) * 8)
2814 return (t->ealgos >> id) & 1;
2817 static int count_ah_combs(const struct xfrm_tmpl *t)
2821 for (i = 0; ; i++) {
2822 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2825 if (aalg_tmpl_set(t, aalg) && aalg->available)
2826 sz += sizeof(struct sadb_comb);
2828 return sz + sizeof(struct sadb_prop);
2831 static int count_esp_combs(const struct xfrm_tmpl *t)
2835 for (i = 0; ; i++) {
2836 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2840 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2843 for (k = 1; ; k++) {
2844 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2848 if (aalg_tmpl_set(t, aalg) && aalg->available)
2849 sz += sizeof(struct sadb_comb);
2852 return sz + sizeof(struct sadb_prop);
2855 static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2857 struct sadb_prop *p;
2860 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2861 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2862 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2863 p->sadb_prop_replay = 32;
2864 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2866 for (i = 0; ; i++) {
2867 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2871 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2872 struct sadb_comb *c;
2873 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2874 memset(c, 0, sizeof(*c));
2875 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2876 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2877 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2878 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2879 c->sadb_comb_hard_addtime = 24*60*60;
2880 c->sadb_comb_soft_addtime = 20*60*60;
2881 c->sadb_comb_hard_usetime = 8*60*60;
2882 c->sadb_comb_soft_usetime = 7*60*60;
2887 static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2889 struct sadb_prop *p;
2892 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2893 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2894 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2895 p->sadb_prop_replay = 32;
2896 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2899 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2903 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2906 for (k = 1; ; k++) {
2907 struct sadb_comb *c;
2908 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2911 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2913 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2914 memset(c, 0, sizeof(*c));
2915 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2916 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2917 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2918 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2919 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2920 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2921 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2922 c->sadb_comb_hard_addtime = 24*60*60;
2923 c->sadb_comb_soft_addtime = 20*60*60;
2924 c->sadb_comb_hard_usetime = 8*60*60;
2925 c->sadb_comb_soft_usetime = 7*60*60;
2930 static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
2935 static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
2937 struct sk_buff *out_skb;
2938 struct sadb_msg *out_hdr;
2942 hard = c->data.hard;
2948 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
2949 if (IS_ERR(out_skb))
2950 return PTR_ERR(out_skb);
2952 out_hdr = (struct sadb_msg *) out_skb->data;
2953 out_hdr->sadb_msg_version = PF_KEY_V2;
2954 out_hdr->sadb_msg_type = SADB_EXPIRE;
2955 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2956 out_hdr->sadb_msg_errno = 0;
2957 out_hdr->sadb_msg_reserved = 0;
2958 out_hdr->sadb_msg_seq = 0;
2959 out_hdr->sadb_msg_pid = 0;
2961 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
2965 static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
2967 struct net *net = x ? xs_net(x) : c->net;
2968 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
2970 if (atomic_read(&net_pfkey->socks_nr) == 0)
2974 case XFRM_MSG_EXPIRE:
2975 return key_notify_sa_expire(x, c);
2976 case XFRM_MSG_DELSA:
2977 case XFRM_MSG_NEWSA:
2978 case XFRM_MSG_UPDSA:
2979 return key_notify_sa(x, c);
2980 case XFRM_MSG_FLUSHSA:
2981 return key_notify_sa_flush(c);
2982 case XFRM_MSG_NEWAE: /* not yet supported */
2985 pr_err("pfkey: Unknown SA event %d\n", c->event);
2992 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2994 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2998 case XFRM_MSG_POLEXPIRE:
2999 return key_notify_policy_expire(xp, c);
3000 case XFRM_MSG_DELPOLICY:
3001 case XFRM_MSG_NEWPOLICY:
3002 case XFRM_MSG_UPDPOLICY:
3003 return key_notify_policy(xp, dir, c);
3004 case XFRM_MSG_FLUSHPOLICY:
3005 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3007 return key_notify_policy_flush(c);
3009 pr_err("pfkey: Unknown policy event %d\n", c->event);
3016 static u32 get_acqseq(void)
3019 static atomic_t acqseq;
3022 res = atomic_inc_return(&acqseq);
3027 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
3029 struct sk_buff *skb;
3030 struct sadb_msg *hdr;
3031 struct sadb_address *addr;
3032 struct sadb_x_policy *pol;
3035 struct sadb_x_sec_ctx *sec_ctx;
3036 struct xfrm_sec_ctx *xfrm_ctx;
3039 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3043 size = sizeof(struct sadb_msg) +
3044 (sizeof(struct sadb_address) * 2) +
3045 (sockaddr_size * 2) +
3046 sizeof(struct sadb_x_policy);
3048 if (x->id.proto == IPPROTO_AH)
3049 size += count_ah_combs(t);
3050 else if (x->id.proto == IPPROTO_ESP)
3051 size += count_esp_combs(t);
3053 if ((xfrm_ctx = x->security)) {
3054 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3055 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3058 skb = alloc_skb(size + 16, GFP_ATOMIC);
3062 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3063 hdr->sadb_msg_version = PF_KEY_V2;
3064 hdr->sadb_msg_type = SADB_ACQUIRE;
3065 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3066 hdr->sadb_msg_len = size / sizeof(uint64_t);
3067 hdr->sadb_msg_errno = 0;
3068 hdr->sadb_msg_reserved = 0;
3069 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3070 hdr->sadb_msg_pid = 0;
3073 addr = (struct sadb_address*) skb_put(skb,
3074 sizeof(struct sadb_address)+sockaddr_size);
3075 addr->sadb_address_len =
3076 (sizeof(struct sadb_address)+sockaddr_size)/
3078 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3079 addr->sadb_address_proto = 0;
3080 addr->sadb_address_reserved = 0;
3081 addr->sadb_address_prefixlen =
3082 pfkey_sockaddr_fill(&x->props.saddr, 0,
3083 (struct sockaddr *) (addr + 1),
3085 if (!addr->sadb_address_prefixlen)
3089 addr = (struct sadb_address*) skb_put(skb,
3090 sizeof(struct sadb_address)+sockaddr_size);
3091 addr->sadb_address_len =
3092 (sizeof(struct sadb_address)+sockaddr_size)/
3094 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3095 addr->sadb_address_proto = 0;
3096 addr->sadb_address_reserved = 0;
3097 addr->sadb_address_prefixlen =
3098 pfkey_sockaddr_fill(&x->id.daddr, 0,
3099 (struct sockaddr *) (addr + 1),
3101 if (!addr->sadb_address_prefixlen)
3104 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3105 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3106 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3107 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3108 pol->sadb_x_policy_dir = dir+1;
3109 pol->sadb_x_policy_id = xp->index;
3111 /* Set sadb_comb's. */
3112 if (x->id.proto == IPPROTO_AH)
3113 dump_ah_combs(skb, t);
3114 else if (x->id.proto == IPPROTO_ESP)
3115 dump_esp_combs(skb, t);
3117 /* security context */
3119 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3120 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3121 sec_ctx->sadb_x_sec_len =
3122 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3123 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3124 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3125 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3126 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3127 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3131 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
3134 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3135 u8 *data, int len, int *dir)
3137 struct net *net = sock_net(sk);
3138 struct xfrm_policy *xp;
3139 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3140 struct sadb_x_sec_ctx *sec_ctx;
3142 switch (sk->sk_family) {
3144 if (opt != IP_IPSEC_POLICY) {
3149 #if IS_ENABLED(CONFIG_IPV6)
3151 if (opt != IPV6_IPSEC_POLICY) {
3164 if (len < sizeof(struct sadb_x_policy) ||
3165 pol->sadb_x_policy_len*8 > len ||
3166 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3167 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3170 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3176 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3177 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3179 xp->lft.soft_byte_limit = XFRM_INF;
3180 xp->lft.hard_byte_limit = XFRM_INF;
3181 xp->lft.soft_packet_limit = XFRM_INF;
3182 xp->lft.hard_packet_limit = XFRM_INF;
3183 xp->family = sk->sk_family;
3186 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3187 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3190 /* security context too */
3191 if (len >= (pol->sadb_x_policy_len*8 +
3192 sizeof(struct sadb_x_sec_ctx))) {
3193 char *p = (char *)pol;
3194 struct xfrm_user_sec_ctx *uctx;
3196 p += pol->sadb_x_policy_len*8;
3197 sec_ctx = (struct sadb_x_sec_ctx *)p;
3198 if (len < pol->sadb_x_policy_len*8 +
3199 sec_ctx->sadb_x_sec_len) {
3203 if ((*dir = verify_sec_ctx_len(p)))
3205 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3206 *dir = security_xfrm_policy_alloc(&xp->security, uctx);
3213 *dir = pol->sadb_x_policy_dir-1;
3218 xfrm_policy_destroy(xp);
3222 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3224 struct sk_buff *skb;
3225 struct sadb_msg *hdr;
3227 struct sadb_address *addr;
3228 struct sadb_x_nat_t_port *n_port;
3231 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3232 struct xfrm_encap_tmpl *natt = NULL;
3234 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3246 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3248 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3249 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3252 size = sizeof(struct sadb_msg) +
3253 sizeof(struct sadb_sa) +
3254 (sizeof(struct sadb_address) * 2) +
3255 (sockaddr_size * 2) +
3256 (sizeof(struct sadb_x_nat_t_port) * 2);
3258 skb = alloc_skb(size + 16, GFP_ATOMIC);
3262 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3263 hdr->sadb_msg_version = PF_KEY_V2;
3264 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3265 hdr->sadb_msg_satype = satype;
3266 hdr->sadb_msg_len = size / sizeof(uint64_t);
3267 hdr->sadb_msg_errno = 0;
3268 hdr->sadb_msg_reserved = 0;
3269 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3270 hdr->sadb_msg_pid = 0;
3273 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3274 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3275 sa->sadb_sa_exttype = SADB_EXT_SA;
3276 sa->sadb_sa_spi = x->id.spi;
3277 sa->sadb_sa_replay = 0;
3278 sa->sadb_sa_state = 0;
3279 sa->sadb_sa_auth = 0;
3280 sa->sadb_sa_encrypt = 0;
3281 sa->sadb_sa_flags = 0;
3283 /* ADDRESS_SRC (old addr) */
3284 addr = (struct sadb_address*)
3285 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3286 addr->sadb_address_len =
3287 (sizeof(struct sadb_address)+sockaddr_size)/
3289 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3290 addr->sadb_address_proto = 0;
3291 addr->sadb_address_reserved = 0;
3292 addr->sadb_address_prefixlen =
3293 pfkey_sockaddr_fill(&x->props.saddr, 0,
3294 (struct sockaddr *) (addr + 1),
3296 if (!addr->sadb_address_prefixlen)
3299 /* NAT_T_SPORT (old port) */
3300 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3301 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3302 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3303 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3304 n_port->sadb_x_nat_t_port_reserved = 0;
3306 /* ADDRESS_DST (new addr) */
3307 addr = (struct sadb_address*)
3308 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3309 addr->sadb_address_len =
3310 (sizeof(struct sadb_address)+sockaddr_size)/
3312 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3313 addr->sadb_address_proto = 0;
3314 addr->sadb_address_reserved = 0;
3315 addr->sadb_address_prefixlen =
3316 pfkey_sockaddr_fill(ipaddr, 0,
3317 (struct sockaddr *) (addr + 1),
3319 if (!addr->sadb_address_prefixlen)
3322 /* NAT_T_DPORT (new port) */
3323 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3324 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3325 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3326 n_port->sadb_x_nat_t_port_port = sport;
3327 n_port->sadb_x_nat_t_port_reserved = 0;
3329 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
3332 #ifdef CONFIG_NET_KEY_MIGRATE
3333 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3334 const struct xfrm_selector *sel)
3336 struct sadb_address *addr;
3337 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3338 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3339 addr->sadb_address_exttype = type;
3340 addr->sadb_address_proto = sel->proto;
3341 addr->sadb_address_reserved = 0;
3344 case SADB_EXT_ADDRESS_SRC:
3345 addr->sadb_address_prefixlen = sel->prefixlen_s;
3346 pfkey_sockaddr_fill(&sel->saddr, 0,
3347 (struct sockaddr *)(addr + 1),
3350 case SADB_EXT_ADDRESS_DST:
3351 addr->sadb_address_prefixlen = sel->prefixlen_d;
3352 pfkey_sockaddr_fill(&sel->daddr, 0,
3353 (struct sockaddr *)(addr + 1),
3364 static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
3366 struct sadb_x_kmaddress *kma;
3368 int family = k->family;
3369 int socklen = pfkey_sockaddr_len(family);
3372 size_req = (sizeof(struct sadb_x_kmaddress) +
3373 pfkey_sockaddr_pair_size(family));
3375 kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req);
3376 memset(kma, 0, size_req);
3377 kma->sadb_x_kmaddress_len = size_req / 8;
3378 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3379 kma->sadb_x_kmaddress_reserved = k->reserved;
3381 sa = (u8 *)(kma + 1);
3382 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3383 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3389 static int set_ipsecrequest(struct sk_buff *skb,
3390 uint8_t proto, uint8_t mode, int level,
3391 uint32_t reqid, uint8_t family,
3392 const xfrm_address_t *src, const xfrm_address_t *dst)
3394 struct sadb_x_ipsecrequest *rq;
3396 int socklen = pfkey_sockaddr_len(family);
3399 size_req = sizeof(struct sadb_x_ipsecrequest) +
3400 pfkey_sockaddr_pair_size(family);
3402 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3403 memset(rq, 0, size_req);
3404 rq->sadb_x_ipsecrequest_len = size_req;
3405 rq->sadb_x_ipsecrequest_proto = proto;
3406 rq->sadb_x_ipsecrequest_mode = mode;
3407 rq->sadb_x_ipsecrequest_level = level;
3408 rq->sadb_x_ipsecrequest_reqid = reqid;
3410 sa = (u8 *) (rq + 1);
3411 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3412 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3419 #ifdef CONFIG_NET_KEY_MIGRATE
3420 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3421 const struct xfrm_migrate *m, int num_bundles,
3422 const struct xfrm_kmaddress *k)
3428 struct sk_buff *skb;
3429 struct sadb_msg *hdr;
3430 struct sadb_x_policy *pol;
3431 const struct xfrm_migrate *mp;
3433 if (type != XFRM_POLICY_TYPE_MAIN)
3436 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3440 /* addresses for KM */
3441 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3442 pfkey_sockaddr_pair_size(k->family));
3446 sasize_sel = pfkey_sockaddr_size(sel->family);
3449 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3452 size_pol += sizeof(struct sadb_x_policy);
3455 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3456 /* old locator pair */
3457 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3458 pfkey_sockaddr_pair_size(mp->old_family);
3459 /* new locator pair */
3460 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3461 pfkey_sockaddr_pair_size(mp->new_family);
3464 size += sizeof(struct sadb_msg) + size_pol;
3467 skb = alloc_skb(size, GFP_ATOMIC);
3471 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3472 hdr->sadb_msg_version = PF_KEY_V2;
3473 hdr->sadb_msg_type = SADB_X_MIGRATE;
3474 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3475 hdr->sadb_msg_len = size / 8;
3476 hdr->sadb_msg_errno = 0;
3477 hdr->sadb_msg_reserved = 0;
3478 hdr->sadb_msg_seq = 0;
3479 hdr->sadb_msg_pid = 0;
3481 /* Addresses to be used by KM for negotiation, if ext is available */
3482 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3486 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3489 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3491 /* policy information */
3492 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3493 pol->sadb_x_policy_len = size_pol / 8;
3494 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3495 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3496 pol->sadb_x_policy_dir = dir + 1;
3497 pol->sadb_x_policy_id = 0;
3498 pol->sadb_x_policy_priority = 0;
3500 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3501 /* old ipsecrequest */
3502 int mode = pfkey_mode_from_xfrm(mp->mode);
3505 if (set_ipsecrequest(skb, mp->proto, mode,
3506 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3507 mp->reqid, mp->old_family,
3508 &mp->old_saddr, &mp->old_daddr) < 0)
3511 /* new ipsecrequest */
3512 if (set_ipsecrequest(skb, mp->proto, mode,
3513 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3514 mp->reqid, mp->new_family,
3515 &mp->new_saddr, &mp->new_daddr) < 0)
3519 /* broadcast migrate message to sockets */
3520 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
3529 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3530 const struct xfrm_migrate *m, int num_bundles,
3531 const struct xfrm_kmaddress *k)
3533 return -ENOPROTOOPT;
3537 static int pfkey_sendmsg(struct kiocb *kiocb,
3538 struct socket *sock, struct msghdr *msg, size_t len)
3540 struct sock *sk = sock->sk;
3541 struct sk_buff *skb = NULL;
3542 struct sadb_msg *hdr = NULL;
3546 if (msg->msg_flags & MSG_OOB)
3550 if ((unsigned)len > sk->sk_sndbuf - 32)
3554 skb = alloc_skb(len, GFP_KERNEL);
3559 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3562 hdr = pfkey_get_base_msg(skb, &err);
3566 mutex_lock(&xfrm_cfg_mutex);
3567 err = pfkey_process(sk, skb, hdr);
3568 mutex_unlock(&xfrm_cfg_mutex);
3571 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3578 static int pfkey_recvmsg(struct kiocb *kiocb,
3579 struct socket *sock, struct msghdr *msg, size_t len,
3582 struct sock *sk = sock->sk;
3583 struct pfkey_sock *pfk = pfkey_sk(sk);
3584 struct sk_buff *skb;
3588 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3591 msg->msg_namelen = 0;
3592 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3598 msg->msg_flags |= MSG_TRUNC;
3602 skb_reset_transport_header(skb);
3603 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3607 sock_recv_ts_and_drops(msg, sk, skb);
3609 err = (flags & MSG_TRUNC) ? skb->len : copied;
3611 if (pfk->dump.dump != NULL &&
3612 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3616 skb_free_datagram(sk, skb);
3621 static const struct proto_ops pfkey_ops = {
3623 .owner = THIS_MODULE,
3624 /* Operations that make no sense on pfkey sockets. */
3625 .bind = sock_no_bind,
3626 .connect = sock_no_connect,
3627 .socketpair = sock_no_socketpair,
3628 .accept = sock_no_accept,
3629 .getname = sock_no_getname,
3630 .ioctl = sock_no_ioctl,
3631 .listen = sock_no_listen,
3632 .shutdown = sock_no_shutdown,
3633 .setsockopt = sock_no_setsockopt,
3634 .getsockopt = sock_no_getsockopt,
3635 .mmap = sock_no_mmap,
3636 .sendpage = sock_no_sendpage,
3638 /* Now the operations that really occur. */
3639 .release = pfkey_release,
3640 .poll = datagram_poll,
3641 .sendmsg = pfkey_sendmsg,
3642 .recvmsg = pfkey_recvmsg,
3645 static const struct net_proto_family pfkey_family_ops = {
3647 .create = pfkey_create,
3648 .owner = THIS_MODULE,
3651 #ifdef CONFIG_PROC_FS
3652 static int pfkey_seq_show(struct seq_file *f, void *v)
3654 struct sock *s = sk_entry(v);
3656 if (v == SEQ_START_TOKEN)
3657 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3659 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
3661 atomic_read(&s->sk_refcnt),
3662 sk_rmem_alloc_get(s),
3663 sk_wmem_alloc_get(s),
3670 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3673 struct net *net = seq_file_net(f);
3674 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3677 return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
3680 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3682 struct net *net = seq_file_net(f);
3683 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3685 return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
3688 static void pfkey_seq_stop(struct seq_file *f, void *v)
3694 static const struct seq_operations pfkey_seq_ops = {
3695 .start = pfkey_seq_start,
3696 .next = pfkey_seq_next,
3697 .stop = pfkey_seq_stop,
3698 .show = pfkey_seq_show,
3701 static int pfkey_seq_open(struct inode *inode, struct file *file)
3703 return seq_open_net(inode, file, &pfkey_seq_ops,
3704 sizeof(struct seq_net_private));
3707 static const struct file_operations pfkey_proc_ops = {
3708 .open = pfkey_seq_open,
3710 .llseek = seq_lseek,
3711 .release = seq_release_net,
3714 static int __net_init pfkey_init_proc(struct net *net)
3716 struct proc_dir_entry *e;
3718 e = proc_net_fops_create(net, "pfkey", 0, &pfkey_proc_ops);
3725 static void __net_exit pfkey_exit_proc(struct net *net)
3727 proc_net_remove(net, "pfkey");
3730 static inline int pfkey_init_proc(struct net *net)
3735 static inline void pfkey_exit_proc(struct net *net)
3740 static struct xfrm_mgr pfkeyv2_mgr =
3743 .notify = pfkey_send_notify,
3744 .acquire = pfkey_send_acquire,
3745 .compile_policy = pfkey_compile_policy,
3746 .new_mapping = pfkey_send_new_mapping,
3747 .notify_policy = pfkey_send_policy_notify,
3748 .migrate = pfkey_send_migrate,
3751 static int __net_init pfkey_net_init(struct net *net)
3753 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3756 INIT_HLIST_HEAD(&net_pfkey->table);
3757 atomic_set(&net_pfkey->socks_nr, 0);
3759 rv = pfkey_init_proc(net);
3764 static void __net_exit pfkey_net_exit(struct net *net)
3766 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3768 pfkey_exit_proc(net);
3769 BUG_ON(!hlist_empty(&net_pfkey->table));
3772 static struct pernet_operations pfkey_net_ops = {
3773 .init = pfkey_net_init,
3774 .exit = pfkey_net_exit,
3775 .id = &pfkey_net_id,
3776 .size = sizeof(struct netns_pfkey),
3779 static void __exit ipsec_pfkey_exit(void)
3781 xfrm_unregister_km(&pfkeyv2_mgr);
3782 sock_unregister(PF_KEY);
3783 unregister_pernet_subsys(&pfkey_net_ops);
3784 proto_unregister(&key_proto);
3787 static int __init ipsec_pfkey_init(void)
3789 int err = proto_register(&key_proto, 0);
3794 err = register_pernet_subsys(&pfkey_net_ops);
3796 goto out_unregister_key_proto;
3797 err = sock_register(&pfkey_family_ops);
3799 goto out_unregister_pernet;
3800 err = xfrm_register_km(&pfkeyv2_mgr);
3802 goto out_sock_unregister;
3806 out_sock_unregister:
3807 sock_unregister(PF_KEY);
3808 out_unregister_pernet:
3809 unregister_pernet_subsys(&pfkey_net_ops);
3810 out_unregister_key_proto:
3811 proto_unregister(&key_proto);
3815 module_init(ipsec_pfkey_init);
3816 module_exit(ipsec_pfkey_exit);
3817 MODULE_LICENSE("GPL");
3818 MODULE_ALIAS_NETPROTO(PF_KEY);