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 const struct xfrm_mark dummy_mark = {0, 0};
50 /* struct sock must be the first member of struct pfkey_sock */
58 int (*dump)(struct pfkey_sock *sk);
59 void (*done)(struct pfkey_sock *sk);
61 struct xfrm_policy_walk policy;
62 struct xfrm_state_walk state;
66 struct mutex dump_lock;
69 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
70 xfrm_address_t *saddr, xfrm_address_t *daddr,
73 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
75 return (struct pfkey_sock *)sk;
78 static int pfkey_can_dump(const struct sock *sk)
80 if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
85 static void pfkey_terminate_dump(struct pfkey_sock *pfk)
89 kfree_skb(pfk->dump.skb);
93 pfk->dump.dump = NULL;
94 pfk->dump.done = NULL;
98 static void pfkey_sock_destruct(struct sock *sk)
100 struct net *net = sock_net(sk);
101 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
103 pfkey_terminate_dump(pfkey_sk(sk));
104 skb_queue_purge(&sk->sk_receive_queue);
106 if (!sock_flag(sk, SOCK_DEAD)) {
107 pr_err("Attempt to release alive pfkey socket: %p\n", sk);
111 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
112 WARN_ON(atomic_read(&sk->sk_wmem_alloc));
114 atomic_dec(&net_pfkey->socks_nr);
117 static const struct proto_ops pfkey_ops;
119 static void pfkey_insert(struct sock *sk)
121 struct net *net = sock_net(sk);
122 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
124 mutex_lock(&pfkey_mutex);
125 sk_add_node_rcu(sk, &net_pfkey->table);
126 mutex_unlock(&pfkey_mutex);
129 static void pfkey_remove(struct sock *sk)
131 mutex_lock(&pfkey_mutex);
132 sk_del_node_init_rcu(sk);
133 mutex_unlock(&pfkey_mutex);
136 static struct proto key_proto = {
138 .owner = THIS_MODULE,
139 .obj_size = sizeof(struct pfkey_sock),
142 static int pfkey_create(struct net *net, struct socket *sock, int protocol,
145 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
147 struct pfkey_sock *pfk;
150 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
152 if (sock->type != SOCK_RAW)
153 return -ESOCKTNOSUPPORT;
154 if (protocol != PF_KEY_V2)
155 return -EPROTONOSUPPORT;
158 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto, kern);
163 mutex_init(&pfk->dump_lock);
165 sock->ops = &pfkey_ops;
166 sock_init_data(sock, sk);
168 sk->sk_family = PF_KEY;
169 sk->sk_destruct = pfkey_sock_destruct;
171 atomic_inc(&net_pfkey->socks_nr);
180 static int pfkey_release(struct socket *sock)
182 struct sock *sk = sock->sk;
191 skb_queue_purge(&sk->sk_write_queue);
199 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
200 gfp_t allocation, struct sock *sk)
206 if (atomic_read(&skb->users) != 1) {
207 *skb2 = skb_clone(skb, allocation);
210 atomic_inc(&skb->users);
214 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
215 skb_set_owner_r(*skb2, sk);
216 skb_queue_tail(&sk->sk_receive_queue, *skb2);
217 sk->sk_data_ready(sk);
226 /* Send SKB to all pfkey sockets matching selected criteria. */
227 #define BROADCAST_ALL 0
228 #define BROADCAST_ONE 1
229 #define BROADCAST_REGISTERED 2
230 #define BROADCAST_PROMISC_ONLY 4
231 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
232 int broadcast_flags, struct sock *one_sk,
235 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
237 struct sk_buff *skb2 = NULL;
240 /* XXX Do we need something like netlink_overrun? I think
241 * XXX PF_KEY socket apps will not mind current behavior.
247 sk_for_each_rcu(sk, &net_pfkey->table) {
248 struct pfkey_sock *pfk = pfkey_sk(sk);
251 /* Yes, it means that if you are meant to receive this
252 * pfkey message you receive it twice as promiscuous
256 pfkey_broadcast_one(skb, &skb2, GFP_ATOMIC, sk);
258 /* the exact target will be processed later */
261 if (broadcast_flags != BROADCAST_ALL) {
262 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
264 if ((broadcast_flags & BROADCAST_REGISTERED) &&
267 if (broadcast_flags & BROADCAST_ONE)
271 err2 = pfkey_broadcast_one(skb, &skb2, GFP_ATOMIC, sk);
273 /* Error is cleared after successful sending to at least one
275 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
281 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
288 static int pfkey_do_dump(struct pfkey_sock *pfk)
290 struct sadb_msg *hdr;
293 mutex_lock(&pfk->dump_lock);
294 if (!pfk->dump.dump) {
299 rc = pfk->dump.dump(pfk);
300 if (rc == -ENOBUFS) {
306 if (!pfkey_can_dump(&pfk->sk)) {
311 hdr = (struct sadb_msg *) pfk->dump.skb->data;
312 hdr->sadb_msg_seq = 0;
313 hdr->sadb_msg_errno = rc;
314 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
315 &pfk->sk, sock_net(&pfk->sk));
316 pfk->dump.skb = NULL;
319 pfkey_terminate_dump(pfk);
322 mutex_unlock(&pfk->dump_lock);
326 static inline void pfkey_hdr_dup(struct sadb_msg *new,
327 const struct sadb_msg *orig)
332 static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk)
334 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
335 struct sadb_msg *hdr;
340 /* Woe be to the platform trying to support PFKEY yet
341 * having normal errnos outside the 1-255 range, inclusive.
344 if (err == ERESTARTSYS ||
345 err == ERESTARTNOHAND ||
346 err == ERESTARTNOINTR)
350 BUG_ON(err <= 0 || err >= 256);
352 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
353 pfkey_hdr_dup(hdr, orig);
354 hdr->sadb_msg_errno = (uint8_t) err;
355 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
358 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk));
363 static const u8 sadb_ext_min_len[] = {
364 [SADB_EXT_RESERVED] = (u8) 0,
365 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
366 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
367 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
368 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
369 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
370 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
371 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
372 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
373 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
374 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
375 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
376 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
377 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
378 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
379 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
380 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
381 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
382 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
383 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
384 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
385 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
386 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
387 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
388 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
389 [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress),
390 [SADB_X_EXT_FILTER] = (u8) sizeof(struct sadb_x_filter),
393 /* Verify sadb_address_{len,prefixlen} against sa_family. */
394 static int verify_address_len(const void *p)
396 const struct sadb_address *sp = p;
397 const struct sockaddr *addr = (const struct sockaddr *)(sp + 1);
398 const struct sockaddr_in *sin;
399 #if IS_ENABLED(CONFIG_IPV6)
400 const struct sockaddr_in6 *sin6;
404 if (sp->sadb_address_len <
405 DIV_ROUND_UP(sizeof(*sp) + offsetofend(typeof(*addr), sa_family),
409 switch (addr->sa_family) {
411 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
412 if (sp->sadb_address_len != len ||
413 sp->sadb_address_prefixlen > 32)
416 #if IS_ENABLED(CONFIG_IPV6)
418 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
419 if (sp->sadb_address_len != len ||
420 sp->sadb_address_prefixlen > 128)
425 /* It is user using kernel to keep track of security
426 * associations for another protocol, such as
427 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
430 * XXX Actually, association/policy database is not yet
431 * XXX able to cope with arbitrary sockaddr families.
432 * XXX When it can, remove this -EINVAL. -DaveM
440 static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx)
442 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
443 sec_ctx->sadb_x_ctx_len,
447 static inline int verify_sec_ctx_len(const void *p)
449 const struct sadb_x_sec_ctx *sec_ctx = p;
450 int len = sec_ctx->sadb_x_ctx_len;
455 len = pfkey_sec_ctx_len(sec_ctx);
457 if (sec_ctx->sadb_x_sec_len != len)
463 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx,
466 struct xfrm_user_sec_ctx *uctx = NULL;
467 int ctx_size = sec_ctx->sadb_x_ctx_len;
469 uctx = kmalloc((sizeof(*uctx)+ctx_size), gfp);
474 uctx->len = pfkey_sec_ctx_len(sec_ctx);
475 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
476 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
477 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
478 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
479 memcpy(uctx + 1, sec_ctx + 1,
485 static int present_and_same_family(const struct sadb_address *src,
486 const struct sadb_address *dst)
488 const struct sockaddr *s_addr, *d_addr;
493 s_addr = (const struct sockaddr *)(src + 1);
494 d_addr = (const struct sockaddr *)(dst + 1);
495 if (s_addr->sa_family != d_addr->sa_family)
497 if (s_addr->sa_family != AF_INET
498 #if IS_ENABLED(CONFIG_IPV6)
499 && s_addr->sa_family != AF_INET6
507 static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs)
509 const char *p = (char *) hdr;
515 const struct sadb_ext *ehdr = (const struct sadb_ext *) p;
519 if (len < sizeof(*ehdr))
522 ext_len = ehdr->sadb_ext_len;
523 ext_len *= sizeof(uint64_t);
524 ext_type = ehdr->sadb_ext_type;
525 if (ext_len < sizeof(uint64_t) ||
527 ext_type == SADB_EXT_RESERVED)
530 if (ext_type <= SADB_EXT_MAX) {
531 int min = (int) sadb_ext_min_len[ext_type];
534 if (ext_hdrs[ext_type-1] != NULL)
536 if (ext_type == SADB_EXT_ADDRESS_SRC ||
537 ext_type == SADB_EXT_ADDRESS_DST ||
538 ext_type == SADB_EXT_ADDRESS_PROXY ||
539 ext_type == SADB_X_EXT_NAT_T_OA) {
540 if (verify_address_len(p))
543 if (ext_type == SADB_X_EXT_SEC_CTX) {
544 if (verify_sec_ctx_len(p))
547 ext_hdrs[ext_type-1] = (void *) p;
557 pfkey_satype2proto(uint8_t satype)
560 case SADB_SATYPE_UNSPEC:
561 return IPSEC_PROTO_ANY;
564 case SADB_SATYPE_ESP:
566 case SADB_X_SATYPE_IPCOMP:
575 pfkey_proto2satype(uint16_t proto)
579 return SADB_SATYPE_AH;
581 return SADB_SATYPE_ESP;
583 return SADB_X_SATYPE_IPCOMP;
590 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
591 * say specifically 'just raw sockets' as we encode them as 255.
594 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
596 return proto == IPSEC_PROTO_ANY ? 0 : proto;
599 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
601 return proto ? proto : IPSEC_PROTO_ANY;
604 static inline int pfkey_sockaddr_len(sa_family_t family)
608 return sizeof(struct sockaddr_in);
609 #if IS_ENABLED(CONFIG_IPV6)
611 return sizeof(struct sockaddr_in6);
618 int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
620 switch (sa->sa_family) {
623 ((struct sockaddr_in *)sa)->sin_addr.s_addr;
625 #if IS_ENABLED(CONFIG_IPV6)
628 &((struct sockaddr_in6 *)sa)->sin6_addr,
629 sizeof(struct in6_addr));
637 int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr)
639 return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
643 static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs)
645 const struct sadb_sa *sa;
646 const struct sadb_address *addr;
648 unsigned short family;
649 xfrm_address_t *xaddr;
651 sa = ext_hdrs[SADB_EXT_SA - 1];
655 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
659 /* sadb_address_len should be checked by caller */
660 addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
664 family = ((const struct sockaddr *)(addr + 1))->sa_family;
667 xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr;
669 #if IS_ENABLED(CONFIG_IPV6)
671 xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr;
681 return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family);
684 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
687 pfkey_sockaddr_size(sa_family_t family)
689 return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
692 static inline int pfkey_mode_from_xfrm(int mode)
695 case XFRM_MODE_TRANSPORT:
696 return IPSEC_MODE_TRANSPORT;
697 case XFRM_MODE_TUNNEL:
698 return IPSEC_MODE_TUNNEL;
700 return IPSEC_MODE_BEET;
706 static inline int pfkey_mode_to_xfrm(int mode)
709 case IPSEC_MODE_ANY: /*XXX*/
710 case IPSEC_MODE_TRANSPORT:
711 return XFRM_MODE_TRANSPORT;
712 case IPSEC_MODE_TUNNEL:
713 return XFRM_MODE_TUNNEL;
714 case IPSEC_MODE_BEET:
715 return XFRM_MODE_BEET;
721 static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port,
723 unsigned short family)
728 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
729 sin->sin_family = AF_INET;
730 sin->sin_port = port;
731 sin->sin_addr.s_addr = xaddr->a4;
732 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
735 #if IS_ENABLED(CONFIG_IPV6)
738 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
739 sin6->sin6_family = AF_INET6;
740 sin6->sin6_port = port;
741 sin6->sin6_flowinfo = 0;
742 sin6->sin6_addr = xaddr->in6;
743 sin6->sin6_scope_id = 0;
751 static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x,
752 int add_keys, int hsc)
755 struct sadb_msg *hdr;
757 struct sadb_lifetime *lifetime;
758 struct sadb_address *addr;
759 struct sadb_key *key;
760 struct sadb_x_sa2 *sa2;
761 struct sadb_x_sec_ctx *sec_ctx;
762 struct xfrm_sec_ctx *xfrm_ctx;
765 int auth_key_size = 0;
766 int encrypt_key_size = 0;
768 struct xfrm_encap_tmpl *natt = NULL;
771 /* address family check */
772 sockaddr_size = pfkey_sockaddr_size(x->props.family);
774 return ERR_PTR(-EINVAL);
776 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
777 key(AE), (identity(SD),) (sensitivity)> */
778 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
779 sizeof(struct sadb_lifetime) +
780 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
781 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
782 sizeof(struct sadb_address)*2 +
784 sizeof(struct sadb_x_sa2);
786 if ((xfrm_ctx = x->security)) {
787 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
788 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
791 /* identity & sensitivity */
792 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family))
793 size += sizeof(struct sadb_address) + sockaddr_size;
796 if (x->aalg && x->aalg->alg_key_len) {
798 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
799 size += sizeof(struct sadb_key) + auth_key_size;
801 if (x->ealg && x->ealg->alg_key_len) {
803 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
804 size += sizeof(struct sadb_key) + encrypt_key_size;
810 if (natt && natt->encap_type) {
811 size += sizeof(struct sadb_x_nat_t_type);
812 size += sizeof(struct sadb_x_nat_t_port);
813 size += sizeof(struct sadb_x_nat_t_port);
816 skb = alloc_skb(size + 16, GFP_ATOMIC);
818 return ERR_PTR(-ENOBUFS);
820 /* call should fill header later */
821 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
822 memset(hdr, 0, size); /* XXX do we need this ? */
823 hdr->sadb_msg_len = size / sizeof(uint64_t);
826 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
827 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
828 sa->sadb_sa_exttype = SADB_EXT_SA;
829 sa->sadb_sa_spi = x->id.spi;
830 sa->sadb_sa_replay = x->props.replay_window;
831 switch (x->km.state) {
832 case XFRM_STATE_VALID:
833 sa->sadb_sa_state = x->km.dying ?
834 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
837 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
840 sa->sadb_sa_state = SADB_SASTATE_DEAD;
843 sa->sadb_sa_auth = 0;
845 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
846 sa->sadb_sa_auth = (a && a->pfkey_supported) ?
847 a->desc.sadb_alg_id : 0;
849 sa->sadb_sa_encrypt = 0;
850 BUG_ON(x->ealg && x->calg);
852 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
853 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
854 a->desc.sadb_alg_id : 0;
856 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
858 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
859 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
860 a->desc.sadb_alg_id : 0;
863 sa->sadb_sa_flags = 0;
864 if (x->props.flags & XFRM_STATE_NOECN)
865 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
866 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
867 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
868 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
869 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
873 lifetime = (struct sadb_lifetime *) skb_put(skb,
874 sizeof(struct sadb_lifetime));
875 lifetime->sadb_lifetime_len =
876 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
877 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
878 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
879 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
880 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
881 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
885 lifetime = (struct sadb_lifetime *) skb_put(skb,
886 sizeof(struct sadb_lifetime));
887 lifetime->sadb_lifetime_len =
888 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
889 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
890 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
891 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
892 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
893 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
896 lifetime = (struct sadb_lifetime *) skb_put(skb,
897 sizeof(struct sadb_lifetime));
898 lifetime->sadb_lifetime_len =
899 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
900 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
901 lifetime->sadb_lifetime_allocations = x->curlft.packets;
902 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
903 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
904 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
906 addr = (struct sadb_address*) skb_put(skb,
907 sizeof(struct sadb_address)+sockaddr_size);
908 addr->sadb_address_len =
909 (sizeof(struct sadb_address)+sockaddr_size)/
911 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
912 /* "if the ports are non-zero, then the sadb_address_proto field,
913 normally zero, MUST be filled in with the transport
914 protocol's number." - RFC2367 */
915 addr->sadb_address_proto = 0;
916 addr->sadb_address_reserved = 0;
918 addr->sadb_address_prefixlen =
919 pfkey_sockaddr_fill(&x->props.saddr, 0,
920 (struct sockaddr *) (addr + 1),
922 if (!addr->sadb_address_prefixlen)
926 addr = (struct sadb_address*) skb_put(skb,
927 sizeof(struct sadb_address)+sockaddr_size);
928 addr->sadb_address_len =
929 (sizeof(struct sadb_address)+sockaddr_size)/
931 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
932 addr->sadb_address_proto = 0;
933 addr->sadb_address_reserved = 0;
935 addr->sadb_address_prefixlen =
936 pfkey_sockaddr_fill(&x->id.daddr, 0,
937 (struct sockaddr *) (addr + 1),
939 if (!addr->sadb_address_prefixlen)
942 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr,
944 addr = (struct sadb_address*) skb_put(skb,
945 sizeof(struct sadb_address)+sockaddr_size);
946 addr->sadb_address_len =
947 (sizeof(struct sadb_address)+sockaddr_size)/
949 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
950 addr->sadb_address_proto =
951 pfkey_proto_from_xfrm(x->sel.proto);
952 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
953 addr->sadb_address_reserved = 0;
955 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
956 (struct sockaddr *) (addr + 1),
961 if (add_keys && auth_key_size) {
962 key = (struct sadb_key *) skb_put(skb,
963 sizeof(struct sadb_key)+auth_key_size);
964 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
966 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
967 key->sadb_key_bits = x->aalg->alg_key_len;
968 key->sadb_key_reserved = 0;
969 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
972 if (add_keys && encrypt_key_size) {
973 key = (struct sadb_key *) skb_put(skb,
974 sizeof(struct sadb_key)+encrypt_key_size);
975 key->sadb_key_len = (sizeof(struct sadb_key) +
976 encrypt_key_size) / sizeof(uint64_t);
977 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
978 key->sadb_key_bits = x->ealg->alg_key_len;
979 key->sadb_key_reserved = 0;
980 memcpy(key + 1, x->ealg->alg_key,
981 (x->ealg->alg_key_len+7)/8);
985 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
986 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
987 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
988 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
990 return ERR_PTR(-EINVAL);
992 sa2->sadb_x_sa2_mode = mode;
993 sa2->sadb_x_sa2_reserved1 = 0;
994 sa2->sadb_x_sa2_reserved2 = 0;
995 sa2->sadb_x_sa2_sequence = 0;
996 sa2->sadb_x_sa2_reqid = x->props.reqid;
998 if (natt && natt->encap_type) {
999 struct sadb_x_nat_t_type *n_type;
1000 struct sadb_x_nat_t_port *n_port;
1003 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
1004 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
1005 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
1006 n_type->sadb_x_nat_t_type_type = natt->encap_type;
1007 n_type->sadb_x_nat_t_type_reserved[0] = 0;
1008 n_type->sadb_x_nat_t_type_reserved[1] = 0;
1009 n_type->sadb_x_nat_t_type_reserved[2] = 0;
1012 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
1013 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1014 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
1015 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
1016 n_port->sadb_x_nat_t_port_reserved = 0;
1019 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
1020 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1021 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
1022 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
1023 n_port->sadb_x_nat_t_port_reserved = 0;
1026 /* security context */
1028 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
1029 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1030 sec_ctx->sadb_x_sec_len =
1031 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1032 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1033 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1034 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1035 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1036 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1044 static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x)
1046 struct sk_buff *skb;
1048 skb = __pfkey_xfrm_state2msg(x, 1, 3);
1053 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x,
1056 return __pfkey_xfrm_state2msg(x, 0, hsc);
1059 static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
1060 const struct sadb_msg *hdr,
1061 void * const *ext_hdrs)
1063 struct xfrm_state *x;
1064 const struct sadb_lifetime *lifetime;
1065 const struct sadb_sa *sa;
1066 const struct sadb_key *key;
1067 const struct sadb_x_sec_ctx *sec_ctx;
1072 sa = ext_hdrs[SADB_EXT_SA - 1];
1074 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1075 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1076 return ERR_PTR(-EINVAL);
1077 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1078 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1079 return ERR_PTR(-EINVAL);
1080 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1081 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1082 return ERR_PTR(-EINVAL);
1083 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1084 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1085 return ERR_PTR(-EINVAL);
1087 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1089 return ERR_PTR(-EINVAL);
1091 /* default error is no buffer space */
1096 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1097 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1098 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1099 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1100 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1103 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1104 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1106 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1107 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1108 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1109 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1110 return ERR_PTR(-EINVAL);
1111 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1113 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1114 ((key->sadb_key_bits+7) / 8 == 0 ||
1115 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1116 return ERR_PTR(-EINVAL);
1117 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1119 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1120 ((key->sadb_key_bits+7) / 8 == 0 ||
1121 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1122 return ERR_PTR(-EINVAL);
1124 x = xfrm_state_alloc(net);
1126 return ERR_PTR(-ENOBUFS);
1128 x->id.proto = proto;
1129 x->id.spi = sa->sadb_sa_spi;
1130 x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay,
1131 (sizeof(x->replay.bitmap) * 8));
1132 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1133 x->props.flags |= XFRM_STATE_NOECN;
1134 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1135 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1136 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1137 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1139 lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1];
1140 if (lifetime != NULL) {
1141 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1142 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1143 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1144 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1146 lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1];
1147 if (lifetime != NULL) {
1148 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1149 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1150 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1151 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1154 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
1155 if (sec_ctx != NULL) {
1156 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
1161 err = security_xfrm_state_alloc(x, uctx);
1169 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1170 if (sa->sadb_sa_auth) {
1172 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1173 if (!a || !a->pfkey_supported) {
1178 keysize = (key->sadb_key_bits + 7) / 8;
1179 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1184 strcpy(x->aalg->alg_name, a->name);
1185 x->aalg->alg_key_len = 0;
1187 x->aalg->alg_key_len = key->sadb_key_bits;
1188 memcpy(x->aalg->alg_key, key+1, keysize);
1190 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1191 x->props.aalgo = sa->sadb_sa_auth;
1192 /* x->algo.flags = sa->sadb_sa_flags; */
1194 if (sa->sadb_sa_encrypt) {
1195 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1196 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1197 if (!a || !a->pfkey_supported) {
1201 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1206 strcpy(x->calg->alg_name, a->name);
1207 x->props.calgo = sa->sadb_sa_encrypt;
1210 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1211 if (!a || !a->pfkey_supported) {
1215 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1217 keysize = (key->sadb_key_bits + 7) / 8;
1218 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1223 strcpy(x->ealg->alg_name, a->name);
1224 x->ealg->alg_key_len = 0;
1226 x->ealg->alg_key_len = key->sadb_key_bits;
1227 memcpy(x->ealg->alg_key, key+1, keysize);
1229 x->props.ealgo = sa->sadb_sa_encrypt;
1230 x->geniv = a->uinfo.encr.geniv;
1233 /* x->algo.flags = sa->sadb_sa_flags; */
1235 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1237 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1240 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1241 const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
1242 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1247 x->props.mode = mode;
1248 x->props.reqid = sa2->sadb_x_sa2_reqid;
1251 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1252 const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1254 /* Nobody uses this, but we try. */
1255 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1256 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1260 x->sel.family = x->props.family;
1262 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1263 const struct sadb_x_nat_t_type* n_type;
1264 struct xfrm_encap_tmpl *natt;
1266 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1273 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1274 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1276 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1277 const struct sadb_x_nat_t_port *n_port =
1278 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1279 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1281 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1282 const struct sadb_x_nat_t_port *n_port =
1283 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1284 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1286 memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
1289 err = xfrm_init_state(x);
1293 x->km.seq = hdr->sadb_msg_seq;
1297 x->km.state = XFRM_STATE_DEAD;
1299 return ERR_PTR(err);
1302 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1307 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1309 struct net *net = sock_net(sk);
1310 struct sk_buff *resp_skb;
1311 struct sadb_x_sa2 *sa2;
1312 struct sadb_address *saddr, *daddr;
1313 struct sadb_msg *out_hdr;
1314 struct sadb_spirange *range;
1315 struct xfrm_state *x = NULL;
1318 u32 min_spi, max_spi;
1321 unsigned short family;
1322 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1324 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1325 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1328 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1332 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1333 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1336 reqid = sa2->sadb_x_sa2_reqid;
1342 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1343 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1345 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1348 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1349 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1351 #if IS_ENABLED(CONFIG_IPV6)
1353 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1354 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1359 if (hdr->sadb_msg_seq) {
1360 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1361 if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) {
1368 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family);
1374 max_spi = 0x0fffffff;
1376 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1378 min_spi = range->sadb_spirange_min;
1379 max_spi = range->sadb_spirange_max;
1382 err = verify_spi_info(x->id.proto, min_spi, max_spi);
1388 err = xfrm_alloc_spi(x, min_spi, max_spi);
1389 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1391 if (IS_ERR(resp_skb)) {
1393 return PTR_ERR(resp_skb);
1396 out_hdr = (struct sadb_msg *) resp_skb->data;
1397 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1398 out_hdr->sadb_msg_type = SADB_GETSPI;
1399 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1400 out_hdr->sadb_msg_errno = 0;
1401 out_hdr->sadb_msg_reserved = 0;
1402 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1403 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1407 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
1412 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1414 struct net *net = sock_net(sk);
1415 struct xfrm_state *x;
1417 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1420 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1423 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1427 spin_lock_bh(&x->lock);
1428 if (x->km.state == XFRM_STATE_ACQ)
1429 x->km.state = XFRM_STATE_ERROR;
1431 spin_unlock_bh(&x->lock);
1436 static inline int event2poltype(int event)
1439 case XFRM_MSG_DELPOLICY:
1440 return SADB_X_SPDDELETE;
1441 case XFRM_MSG_NEWPOLICY:
1442 return SADB_X_SPDADD;
1443 case XFRM_MSG_UPDPOLICY:
1444 return SADB_X_SPDUPDATE;
1445 case XFRM_MSG_POLEXPIRE:
1446 // return SADB_X_SPDEXPIRE;
1448 pr_err("pfkey: Unknown policy event %d\n", event);
1455 static inline int event2keytype(int event)
1458 case XFRM_MSG_DELSA:
1460 case XFRM_MSG_NEWSA:
1462 case XFRM_MSG_UPDSA:
1464 case XFRM_MSG_EXPIRE:
1467 pr_err("pfkey: Unknown SA event %d\n", event);
1475 static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
1477 struct sk_buff *skb;
1478 struct sadb_msg *hdr;
1480 skb = pfkey_xfrm_state2msg(x);
1483 return PTR_ERR(skb);
1485 hdr = (struct sadb_msg *) skb->data;
1486 hdr->sadb_msg_version = PF_KEY_V2;
1487 hdr->sadb_msg_type = event2keytype(c->event);
1488 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1489 hdr->sadb_msg_errno = 0;
1490 hdr->sadb_msg_reserved = 0;
1491 hdr->sadb_msg_seq = c->seq;
1492 hdr->sadb_msg_pid = c->portid;
1494 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
1499 static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1501 struct net *net = sock_net(sk);
1502 struct xfrm_state *x;
1506 x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1511 if (hdr->sadb_msg_type == SADB_ADD)
1512 err = xfrm_state_add(x);
1514 err = xfrm_state_update(x);
1516 xfrm_audit_state_add(x, err ? 0 : 1, true);
1519 x->km.state = XFRM_STATE_DEAD;
1520 __xfrm_state_put(x);
1524 if (hdr->sadb_msg_type == SADB_ADD)
1525 c.event = XFRM_MSG_NEWSA;
1527 c.event = XFRM_MSG_UPDSA;
1528 c.seq = hdr->sadb_msg_seq;
1529 c.portid = hdr->sadb_msg_pid;
1530 km_state_notify(x, &c);
1536 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1538 struct net *net = sock_net(sk);
1539 struct xfrm_state *x;
1543 if (!ext_hdrs[SADB_EXT_SA-1] ||
1544 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1545 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1548 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1552 if ((err = security_xfrm_state_delete(x)))
1555 if (xfrm_state_kern(x)) {
1560 err = xfrm_state_delete(x);
1565 c.seq = hdr->sadb_msg_seq;
1566 c.portid = hdr->sadb_msg_pid;
1567 c.event = XFRM_MSG_DELSA;
1568 km_state_notify(x, &c);
1570 xfrm_audit_state_delete(x, err ? 0 : 1, true);
1576 static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1578 struct net *net = sock_net(sk);
1580 struct sk_buff *out_skb;
1581 struct sadb_msg *out_hdr;
1582 struct xfrm_state *x;
1584 if (!ext_hdrs[SADB_EXT_SA-1] ||
1585 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1586 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1589 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1593 out_skb = pfkey_xfrm_state2msg(x);
1594 proto = x->id.proto;
1596 if (IS_ERR(out_skb))
1597 return PTR_ERR(out_skb);
1599 out_hdr = (struct sadb_msg *) out_skb->data;
1600 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1601 out_hdr->sadb_msg_type = SADB_GET;
1602 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1603 out_hdr->sadb_msg_errno = 0;
1604 out_hdr->sadb_msg_reserved = 0;
1605 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1606 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1607 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1612 static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
1615 struct sk_buff *skb;
1616 struct sadb_msg *hdr;
1617 int len, auth_len, enc_len, i;
1619 auth_len = xfrm_count_pfkey_auth_supported();
1621 auth_len *= sizeof(struct sadb_alg);
1622 auth_len += sizeof(struct sadb_supported);
1625 enc_len = xfrm_count_pfkey_enc_supported();
1627 enc_len *= sizeof(struct sadb_alg);
1628 enc_len += sizeof(struct sadb_supported);
1631 len = enc_len + auth_len + sizeof(struct sadb_msg);
1633 skb = alloc_skb(len + 16, allocation);
1637 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1638 pfkey_hdr_dup(hdr, orig);
1639 hdr->sadb_msg_errno = 0;
1640 hdr->sadb_msg_len = len / sizeof(uint64_t);
1643 struct sadb_supported *sp;
1644 struct sadb_alg *ap;
1646 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1647 ap = (struct sadb_alg *) (sp + 1);
1649 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1650 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1652 for (i = 0; ; i++) {
1653 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1656 if (!aalg->pfkey_supported)
1658 if (aalg->available)
1664 struct sadb_supported *sp;
1665 struct sadb_alg *ap;
1667 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1668 ap = (struct sadb_alg *) (sp + 1);
1670 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1671 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1673 for (i = 0; ; i++) {
1674 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1677 if (!ealg->pfkey_supported)
1679 if (ealg->available)
1688 static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1690 struct pfkey_sock *pfk = pfkey_sk(sk);
1691 struct sk_buff *supp_skb;
1693 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1696 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1697 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1699 pfk->registered |= (1<<hdr->sadb_msg_satype);
1704 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1706 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1707 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1712 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk,
1717 static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
1719 struct sk_buff *skb;
1720 struct sadb_msg *hdr;
1722 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1726 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1727 memcpy(hdr, ihdr, sizeof(struct sadb_msg));
1728 hdr->sadb_msg_errno = (uint8_t) 0;
1729 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1731 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk,
1735 static int key_notify_sa_flush(const struct km_event *c)
1737 struct sk_buff *skb;
1738 struct sadb_msg *hdr;
1740 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1743 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1744 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1745 hdr->sadb_msg_type = SADB_FLUSH;
1746 hdr->sadb_msg_seq = c->seq;
1747 hdr->sadb_msg_pid = c->portid;
1748 hdr->sadb_msg_version = PF_KEY_V2;
1749 hdr->sadb_msg_errno = (uint8_t) 0;
1750 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1751 hdr->sadb_msg_reserved = 0;
1753 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
1758 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1760 struct net *net = sock_net(sk);
1765 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1769 err = xfrm_state_flush(net, proto, true);
1770 err2 = unicast_flush_resp(sk, hdr);
1772 if (err == -ESRCH) /* empty table - go quietly */
1774 return err ? err : err2;
1777 c.data.proto = proto;
1778 c.seq = hdr->sadb_msg_seq;
1779 c.portid = hdr->sadb_msg_pid;
1780 c.event = XFRM_MSG_FLUSHSA;
1782 km_state_notify(NULL, &c);
1787 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1789 struct pfkey_sock *pfk = ptr;
1790 struct sk_buff *out_skb;
1791 struct sadb_msg *out_hdr;
1793 if (!pfkey_can_dump(&pfk->sk))
1796 out_skb = pfkey_xfrm_state2msg(x);
1797 if (IS_ERR(out_skb))
1798 return PTR_ERR(out_skb);
1800 out_hdr = (struct sadb_msg *) out_skb->data;
1801 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1802 out_hdr->sadb_msg_type = SADB_DUMP;
1803 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1804 out_hdr->sadb_msg_errno = 0;
1805 out_hdr->sadb_msg_reserved = 0;
1806 out_hdr->sadb_msg_seq = count + 1;
1807 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
1810 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
1811 &pfk->sk, sock_net(&pfk->sk));
1812 pfk->dump.skb = out_skb;
1817 static int pfkey_dump_sa(struct pfkey_sock *pfk)
1819 struct net *net = sock_net(&pfk->sk);
1820 return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1823 static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1825 struct net *net = sock_net(&pfk->sk);
1827 xfrm_state_walk_done(&pfk->dump.u.state, net);
1830 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1833 struct xfrm_address_filter *filter = NULL;
1834 struct pfkey_sock *pfk = pfkey_sk(sk);
1836 mutex_lock(&pfk->dump_lock);
1837 if (pfk->dump.dump != NULL) {
1838 mutex_unlock(&pfk->dump_lock);
1842 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1844 mutex_unlock(&pfk->dump_lock);
1848 if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
1849 struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
1851 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
1852 if (filter == NULL) {
1853 mutex_unlock(&pfk->dump_lock);
1857 memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr,
1858 sizeof(xfrm_address_t));
1859 memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr,
1860 sizeof(xfrm_address_t));
1861 filter->family = xfilter->sadb_x_filter_family;
1862 filter->splen = xfilter->sadb_x_filter_splen;
1863 filter->dplen = xfilter->sadb_x_filter_dplen;
1866 pfk->dump.msg_version = hdr->sadb_msg_version;
1867 pfk->dump.msg_portid = hdr->sadb_msg_pid;
1868 pfk->dump.dump = pfkey_dump_sa;
1869 pfk->dump.done = pfkey_dump_sa_done;
1870 xfrm_state_walk_init(&pfk->dump.u.state, proto, filter);
1871 mutex_unlock(&pfk->dump_lock);
1873 return pfkey_do_dump(pfk);
1876 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1878 struct pfkey_sock *pfk = pfkey_sk(sk);
1879 int satype = hdr->sadb_msg_satype;
1880 bool reset_errno = false;
1882 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1884 if (satype != 0 && satype != 1)
1886 pfk->promisc = satype;
1888 if (reset_errno && skb_cloned(skb))
1889 skb = skb_copy(skb, GFP_KERNEL);
1891 skb = skb_clone(skb, GFP_KERNEL);
1893 if (reset_errno && skb) {
1894 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1895 new_hdr->sadb_msg_errno = 0;
1898 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
1902 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1905 u32 reqid = *(u32*)ptr;
1907 for (i=0; i<xp->xfrm_nr; i++) {
1908 if (xp->xfrm_vec[i].reqid == reqid)
1914 static u32 gen_reqid(struct net *net)
1916 struct xfrm_policy_walk walk;
1919 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1925 reqid = IPSEC_MANUAL_REQID_MAX+1;
1926 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1927 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1928 xfrm_policy_walk_done(&walk, net);
1931 } while (reqid != start);
1936 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1938 struct net *net = xp_net(xp);
1939 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1942 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1945 if (rq->sadb_x_ipsecrequest_mode == 0)
1948 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1949 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1952 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1954 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1955 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1956 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1958 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1962 /* addresses present only in tunnel mode */
1963 if (t->mode == XFRM_MODE_TUNNEL) {
1966 err = parse_sockaddr_pair(
1967 (struct sockaddr *)(rq + 1),
1968 rq->sadb_x_ipsecrequest_len - sizeof(*rq),
1969 &t->saddr, &t->id.daddr, &t->encap_family);
1973 t->encap_family = xp->family;
1975 /* No way to set this via kame pfkey */
1982 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1985 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1986 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1988 if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
1991 while (len >= sizeof(*rq)) {
1992 if (len < rq->sadb_x_ipsecrequest_len ||
1993 rq->sadb_x_ipsecrequest_len < sizeof(*rq))
1996 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1998 len -= rq->sadb_x_ipsecrequest_len;
1999 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
2004 static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
2006 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
2009 int len = sizeof(struct sadb_x_sec_ctx);
2010 len += xfrm_ctx->ctx_len;
2011 return PFKEY_ALIGN8(len);
2016 static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
2018 const struct xfrm_tmpl *t;
2019 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2023 for (i=0; i<xp->xfrm_nr; i++) {
2024 t = xp->xfrm_vec + i;
2025 socklen += pfkey_sockaddr_len(t->encap_family);
2028 return sizeof(struct sadb_msg) +
2029 (sizeof(struct sadb_lifetime) * 3) +
2030 (sizeof(struct sadb_address) * 2) +
2031 (sockaddr_size * 2) +
2032 sizeof(struct sadb_x_policy) +
2033 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
2035 pfkey_xfrm_policy2sec_ctx_size(xp);
2038 static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
2040 struct sk_buff *skb;
2043 size = pfkey_xfrm_policy2msg_size(xp);
2045 skb = alloc_skb(size + 16, GFP_ATOMIC);
2047 return ERR_PTR(-ENOBUFS);
2052 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
2054 struct sadb_msg *hdr;
2055 struct sadb_address *addr;
2056 struct sadb_lifetime *lifetime;
2057 struct sadb_x_policy *pol;
2058 struct sadb_x_sec_ctx *sec_ctx;
2059 struct xfrm_sec_ctx *xfrm_ctx;
2062 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2063 int socklen = pfkey_sockaddr_len(xp->family);
2065 size = pfkey_xfrm_policy2msg_size(xp);
2067 /* call should fill header later */
2068 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2069 memset(hdr, 0, size); /* XXX do we need this ? */
2072 addr = (struct sadb_address*) skb_put(skb,
2073 sizeof(struct sadb_address)+sockaddr_size);
2074 addr->sadb_address_len =
2075 (sizeof(struct sadb_address)+sockaddr_size)/
2077 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2078 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2079 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2080 addr->sadb_address_reserved = 0;
2081 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2083 (struct sockaddr *) (addr + 1),
2088 addr = (struct sadb_address*) skb_put(skb,
2089 sizeof(struct sadb_address)+sockaddr_size);
2090 addr->sadb_address_len =
2091 (sizeof(struct sadb_address)+sockaddr_size)/
2093 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2094 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2095 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2096 addr->sadb_address_reserved = 0;
2098 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2099 (struct sockaddr *) (addr + 1),
2103 lifetime = (struct sadb_lifetime *) skb_put(skb,
2104 sizeof(struct sadb_lifetime));
2105 lifetime->sadb_lifetime_len =
2106 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2107 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2108 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2109 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2110 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2111 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2113 lifetime = (struct sadb_lifetime *) skb_put(skb,
2114 sizeof(struct sadb_lifetime));
2115 lifetime->sadb_lifetime_len =
2116 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2117 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2118 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2119 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2120 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2121 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2123 lifetime = (struct sadb_lifetime *) skb_put(skb,
2124 sizeof(struct sadb_lifetime));
2125 lifetime->sadb_lifetime_len =
2126 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2127 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2128 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2129 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2130 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2131 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2133 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2134 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2135 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2136 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2137 if (xp->action == XFRM_POLICY_ALLOW) {
2139 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2141 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2143 pol->sadb_x_policy_dir = dir+1;
2144 pol->sadb_x_policy_reserved = 0;
2145 pol->sadb_x_policy_id = xp->index;
2146 pol->sadb_x_policy_priority = xp->priority;
2148 for (i=0; i<xp->xfrm_nr; i++) {
2149 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
2150 struct sadb_x_ipsecrequest *rq;
2154 req_size = sizeof(struct sadb_x_ipsecrequest);
2155 if (t->mode == XFRM_MODE_TUNNEL) {
2156 socklen = pfkey_sockaddr_len(t->encap_family);
2157 req_size += socklen * 2;
2161 rq = (void*)skb_put(skb, req_size);
2162 pol->sadb_x_policy_len += req_size/8;
2163 memset(rq, 0, sizeof(*rq));
2164 rq->sadb_x_ipsecrequest_len = req_size;
2165 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2166 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2168 rq->sadb_x_ipsecrequest_mode = mode;
2169 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2171 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2173 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2174 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2176 if (t->mode == XFRM_MODE_TUNNEL) {
2177 u8 *sa = (void *)(rq + 1);
2178 pfkey_sockaddr_fill(&t->saddr, 0,
2179 (struct sockaddr *)sa,
2181 pfkey_sockaddr_fill(&t->id.daddr, 0,
2182 (struct sockaddr *) (sa + socklen),
2187 /* security context */
2188 if ((xfrm_ctx = xp->security)) {
2189 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2191 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2192 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2193 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2194 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2195 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2196 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2197 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2201 hdr->sadb_msg_len = size / sizeof(uint64_t);
2202 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2207 static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2209 struct sk_buff *out_skb;
2210 struct sadb_msg *out_hdr;
2213 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2214 if (IS_ERR(out_skb))
2215 return PTR_ERR(out_skb);
2217 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2221 out_hdr = (struct sadb_msg *) out_skb->data;
2222 out_hdr->sadb_msg_version = PF_KEY_V2;
2224 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2225 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2227 out_hdr->sadb_msg_type = event2poltype(c->event);
2228 out_hdr->sadb_msg_errno = 0;
2229 out_hdr->sadb_msg_seq = c->seq;
2230 out_hdr->sadb_msg_pid = c->portid;
2231 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
2236 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2238 struct net *net = sock_net(sk);
2240 struct sadb_lifetime *lifetime;
2241 struct sadb_address *sa;
2242 struct sadb_x_policy *pol;
2243 struct xfrm_policy *xp;
2245 struct sadb_x_sec_ctx *sec_ctx;
2247 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2248 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2249 !ext_hdrs[SADB_X_EXT_POLICY-1])
2252 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2253 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2255 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2258 xp = xfrm_policy_alloc(net, GFP_KERNEL);
2262 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2263 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2264 xp->priority = pol->sadb_x_policy_priority;
2266 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2267 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2268 xp->selector.family = xp->family;
2269 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2270 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2271 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2272 if (xp->selector.sport)
2273 xp->selector.sport_mask = htons(0xffff);
2275 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2276 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2277 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2279 /* Amusing, we set this twice. KAME apps appear to set same value
2280 * in both addresses.
2282 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2284 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2285 if (xp->selector.dport)
2286 xp->selector.dport_mask = htons(0xffff);
2288 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2289 if (sec_ctx != NULL) {
2290 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2297 err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL);
2304 xp->lft.soft_byte_limit = XFRM_INF;
2305 xp->lft.hard_byte_limit = XFRM_INF;
2306 xp->lft.soft_packet_limit = XFRM_INF;
2307 xp->lft.hard_packet_limit = XFRM_INF;
2308 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2309 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2310 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2311 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2312 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2314 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2315 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2316 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2317 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2318 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2321 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2322 (err = parse_ipsecrequests(xp, pol)) < 0)
2325 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2326 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2328 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
2333 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2334 c.event = XFRM_MSG_UPDPOLICY;
2336 c.event = XFRM_MSG_NEWPOLICY;
2338 c.seq = hdr->sadb_msg_seq;
2339 c.portid = hdr->sadb_msg_pid;
2341 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2347 xfrm_policy_destroy(xp);
2351 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2353 struct net *net = sock_net(sk);
2355 struct sadb_address *sa;
2356 struct sadb_x_policy *pol;
2357 struct xfrm_policy *xp;
2358 struct xfrm_selector sel;
2360 struct sadb_x_sec_ctx *sec_ctx;
2361 struct xfrm_sec_ctx *pol_ctx = NULL;
2363 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2364 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2365 !ext_hdrs[SADB_X_EXT_POLICY-1])
2368 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2369 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2372 memset(&sel, 0, sizeof(sel));
2374 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2375 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2376 sel.prefixlen_s = sa->sadb_address_prefixlen;
2377 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2378 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2380 sel.sport_mask = htons(0xffff);
2382 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2383 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2384 sel.prefixlen_d = sa->sadb_address_prefixlen;
2385 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2386 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2388 sel.dport_mask = htons(0xffff);
2390 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2391 if (sec_ctx != NULL) {
2392 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2397 err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL);
2403 xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2404 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2406 security_xfrm_policy_free(pol_ctx);
2410 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2415 c.seq = hdr->sadb_msg_seq;
2416 c.portid = hdr->sadb_msg_pid;
2418 c.event = XFRM_MSG_DELPOLICY;
2419 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2424 xfrm_garbage_collect(net);
2428 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
2431 struct sk_buff *out_skb;
2432 struct sadb_msg *out_hdr;
2435 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2436 if (IS_ERR(out_skb)) {
2437 err = PTR_ERR(out_skb);
2440 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2444 out_hdr = (struct sadb_msg *) out_skb->data;
2445 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2446 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2447 out_hdr->sadb_msg_satype = 0;
2448 out_hdr->sadb_msg_errno = 0;
2449 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2450 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2451 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
2458 static int pfkey_sockaddr_pair_size(sa_family_t family)
2460 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2463 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2464 xfrm_address_t *saddr, xfrm_address_t *daddr,
2469 if (ext_len < 2 || ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2472 af = pfkey_sockaddr_extract(sa, saddr);
2476 socklen = pfkey_sockaddr_len(af);
2477 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2485 #ifdef CONFIG_NET_KEY_MIGRATE
2486 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2487 struct xfrm_migrate *m)
2490 struct sadb_x_ipsecrequest *rq2;
2493 if (len < sizeof(*rq1) ||
2494 len < rq1->sadb_x_ipsecrequest_len ||
2495 rq1->sadb_x_ipsecrequest_len < sizeof(*rq1))
2499 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2500 rq1->sadb_x_ipsecrequest_len - sizeof(*rq1),
2501 &m->old_saddr, &m->old_daddr,
2506 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2507 len -= rq1->sadb_x_ipsecrequest_len;
2509 if (len <= sizeof(*rq2) ||
2510 len < rq2->sadb_x_ipsecrequest_len ||
2511 rq2->sadb_x_ipsecrequest_len < sizeof(*rq2))
2515 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2516 rq2->sadb_x_ipsecrequest_len - sizeof(*rq2),
2517 &m->new_saddr, &m->new_daddr,
2522 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2523 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2524 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2527 m->proto = rq1->sadb_x_ipsecrequest_proto;
2528 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2531 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2533 return ((int)(rq1->sadb_x_ipsecrequest_len +
2534 rq2->sadb_x_ipsecrequest_len));
2537 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2538 const struct sadb_msg *hdr, void * const *ext_hdrs)
2540 int i, len, ret, err = -EINVAL;
2542 struct sadb_address *sa;
2543 struct sadb_x_kmaddress *kma;
2544 struct sadb_x_policy *pol;
2545 struct sadb_x_ipsecrequest *rq;
2546 struct xfrm_selector sel;
2547 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2548 struct xfrm_kmaddress k;
2549 struct net *net = sock_net(sk);
2551 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2552 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2553 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2558 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2559 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2561 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2567 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2568 k.reserved = kma->sadb_x_kmaddress_reserved;
2569 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2570 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2571 &k.local, &k.remote, &k.family);
2578 dir = pol->sadb_x_policy_dir - 1;
2579 memset(&sel, 0, sizeof(sel));
2581 /* set source address info of selector */
2582 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2583 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2584 sel.prefixlen_s = sa->sadb_address_prefixlen;
2585 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2586 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2588 sel.sport_mask = htons(0xffff);
2590 /* set destination address info of selector */
2591 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
2592 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2593 sel.prefixlen_d = sa->sadb_address_prefixlen;
2594 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2595 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2597 sel.dport_mask = htons(0xffff);
2599 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2601 /* extract ipsecrequests */
2603 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2605 while (len > 0 && i < XFRM_MAX_DEPTH) {
2606 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2611 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2617 if (!i || len > 0) {
2622 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2623 kma ? &k : NULL, net);
2629 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2630 const struct sadb_msg *hdr, void * const *ext_hdrs)
2632 return -ENOPROTOOPT;
2637 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2639 struct net *net = sock_net(sk);
2641 int err = 0, delete;
2642 struct sadb_x_policy *pol;
2643 struct xfrm_policy *xp;
2646 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2649 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2650 if (dir >= XFRM_POLICY_MAX)
2653 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2654 xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2655 dir, pol->sadb_x_policy_id, delete, &err);
2660 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2664 c.seq = hdr->sadb_msg_seq;
2665 c.portid = hdr->sadb_msg_pid;
2667 c.event = XFRM_MSG_DELPOLICY;
2668 km_policy_notify(xp, dir, &c);
2670 err = key_pol_get_resp(sk, xp, hdr, dir);
2675 if (delete && err == 0)
2676 xfrm_garbage_collect(net);
2680 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2682 struct pfkey_sock *pfk = ptr;
2683 struct sk_buff *out_skb;
2684 struct sadb_msg *out_hdr;
2687 if (!pfkey_can_dump(&pfk->sk))
2690 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2691 if (IS_ERR(out_skb))
2692 return PTR_ERR(out_skb);
2694 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2698 out_hdr = (struct sadb_msg *) out_skb->data;
2699 out_hdr->sadb_msg_version = pfk->dump.msg_version;
2700 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2701 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2702 out_hdr->sadb_msg_errno = 0;
2703 out_hdr->sadb_msg_seq = count + 1;
2704 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
2707 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
2708 &pfk->sk, sock_net(&pfk->sk));
2709 pfk->dump.skb = out_skb;
2714 static int pfkey_dump_sp(struct pfkey_sock *pfk)
2716 struct net *net = sock_net(&pfk->sk);
2717 return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2720 static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2722 struct net *net = sock_net((struct sock *)pfk);
2724 xfrm_policy_walk_done(&pfk->dump.u.policy, net);
2727 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2729 struct pfkey_sock *pfk = pfkey_sk(sk);
2731 mutex_lock(&pfk->dump_lock);
2732 if (pfk->dump.dump != NULL) {
2733 mutex_unlock(&pfk->dump_lock);
2737 pfk->dump.msg_version = hdr->sadb_msg_version;
2738 pfk->dump.msg_portid = hdr->sadb_msg_pid;
2739 pfk->dump.dump = pfkey_dump_sp;
2740 pfk->dump.done = pfkey_dump_sp_done;
2741 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2742 mutex_unlock(&pfk->dump_lock);
2744 return pfkey_do_dump(pfk);
2747 static int key_notify_policy_flush(const struct km_event *c)
2749 struct sk_buff *skb_out;
2750 struct sadb_msg *hdr;
2752 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2755 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2756 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2757 hdr->sadb_msg_seq = c->seq;
2758 hdr->sadb_msg_pid = c->portid;
2759 hdr->sadb_msg_version = PF_KEY_V2;
2760 hdr->sadb_msg_errno = (uint8_t) 0;
2761 hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2762 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2763 hdr->sadb_msg_reserved = 0;
2764 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
2769 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2771 struct net *net = sock_net(sk);
2775 err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, true);
2776 err2 = unicast_flush_resp(sk, hdr);
2778 if (err == -ESRCH) /* empty table - old silent behavior */
2783 c.data.type = XFRM_POLICY_TYPE_MAIN;
2784 c.event = XFRM_MSG_FLUSHPOLICY;
2785 c.portid = hdr->sadb_msg_pid;
2786 c.seq = hdr->sadb_msg_seq;
2788 km_policy_notify(NULL, 0, &c);
2793 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2794 const struct sadb_msg *hdr, void * const *ext_hdrs);
2795 static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2796 [SADB_RESERVED] = pfkey_reserved,
2797 [SADB_GETSPI] = pfkey_getspi,
2798 [SADB_UPDATE] = pfkey_add,
2799 [SADB_ADD] = pfkey_add,
2800 [SADB_DELETE] = pfkey_delete,
2801 [SADB_GET] = pfkey_get,
2802 [SADB_ACQUIRE] = pfkey_acquire,
2803 [SADB_REGISTER] = pfkey_register,
2804 [SADB_EXPIRE] = NULL,
2805 [SADB_FLUSH] = pfkey_flush,
2806 [SADB_DUMP] = pfkey_dump,
2807 [SADB_X_PROMISC] = pfkey_promisc,
2808 [SADB_X_PCHANGE] = NULL,
2809 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2810 [SADB_X_SPDADD] = pfkey_spdadd,
2811 [SADB_X_SPDDELETE] = pfkey_spddelete,
2812 [SADB_X_SPDGET] = pfkey_spdget,
2813 [SADB_X_SPDACQUIRE] = NULL,
2814 [SADB_X_SPDDUMP] = pfkey_spddump,
2815 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2816 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2817 [SADB_X_SPDDELETE2] = pfkey_spdget,
2818 [SADB_X_MIGRATE] = pfkey_migrate,
2821 static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
2823 void *ext_hdrs[SADB_EXT_MAX];
2826 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2827 BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
2829 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2830 err = parse_exthdrs(skb, hdr, ext_hdrs);
2833 if (pfkey_funcs[hdr->sadb_msg_type])
2834 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2839 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2841 struct sadb_msg *hdr = NULL;
2843 if (skb->len < sizeof(*hdr)) {
2846 hdr = (struct sadb_msg *) skb->data;
2847 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2848 hdr->sadb_msg_reserved != 0 ||
2849 (hdr->sadb_msg_type <= SADB_RESERVED ||
2850 hdr->sadb_msg_type > SADB_MAX)) {
2853 } else if (hdr->sadb_msg_len != (skb->len /
2854 sizeof(uint64_t)) ||
2855 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2856 sizeof(uint64_t))) {
2866 static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2867 const struct xfrm_algo_desc *d)
2869 unsigned int id = d->desc.sadb_alg_id;
2871 if (id >= sizeof(t->aalgos) * 8)
2874 return (t->aalgos >> id) & 1;
2877 static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2878 const struct xfrm_algo_desc *d)
2880 unsigned int id = d->desc.sadb_alg_id;
2882 if (id >= sizeof(t->ealgos) * 8)
2885 return (t->ealgos >> id) & 1;
2888 static int count_ah_combs(const struct xfrm_tmpl *t)
2892 for (i = 0; ; i++) {
2893 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2896 if (!aalg->pfkey_supported)
2898 if (aalg_tmpl_set(t, aalg) && aalg->available)
2899 sz += sizeof(struct sadb_comb);
2901 return sz + sizeof(struct sadb_prop);
2904 static int count_esp_combs(const struct xfrm_tmpl *t)
2908 for (i = 0; ; i++) {
2909 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2913 if (!ealg->pfkey_supported)
2916 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2919 for (k = 1; ; k++) {
2920 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2924 if (!aalg->pfkey_supported)
2927 if (aalg_tmpl_set(t, aalg) && aalg->available)
2928 sz += sizeof(struct sadb_comb);
2931 return sz + sizeof(struct sadb_prop);
2934 static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2936 struct sadb_prop *p;
2939 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2940 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2941 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2942 p->sadb_prop_replay = 32;
2943 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2945 for (i = 0; ; i++) {
2946 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2950 if (!aalg->pfkey_supported)
2953 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2954 struct sadb_comb *c;
2955 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2956 memset(c, 0, sizeof(*c));
2957 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2958 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2959 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2960 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2961 c->sadb_comb_hard_addtime = 24*60*60;
2962 c->sadb_comb_soft_addtime = 20*60*60;
2963 c->sadb_comb_hard_usetime = 8*60*60;
2964 c->sadb_comb_soft_usetime = 7*60*60;
2969 static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2971 struct sadb_prop *p;
2974 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2975 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2976 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2977 p->sadb_prop_replay = 32;
2978 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2981 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2985 if (!ealg->pfkey_supported)
2988 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2991 for (k = 1; ; k++) {
2992 struct sadb_comb *c;
2993 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2996 if (!aalg->pfkey_supported)
2998 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
3000 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
3001 memset(c, 0, sizeof(*c));
3002 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
3003 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
3004 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
3005 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
3006 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
3007 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
3008 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
3009 c->sadb_comb_hard_addtime = 24*60*60;
3010 c->sadb_comb_soft_addtime = 20*60*60;
3011 c->sadb_comb_hard_usetime = 8*60*60;
3012 c->sadb_comb_soft_usetime = 7*60*60;
3017 static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
3022 static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
3024 struct sk_buff *out_skb;
3025 struct sadb_msg *out_hdr;
3029 hard = c->data.hard;
3035 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
3036 if (IS_ERR(out_skb))
3037 return PTR_ERR(out_skb);
3039 out_hdr = (struct sadb_msg *) out_skb->data;
3040 out_hdr->sadb_msg_version = PF_KEY_V2;
3041 out_hdr->sadb_msg_type = SADB_EXPIRE;
3042 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3043 out_hdr->sadb_msg_errno = 0;
3044 out_hdr->sadb_msg_reserved = 0;
3045 out_hdr->sadb_msg_seq = 0;
3046 out_hdr->sadb_msg_pid = 0;
3048 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3053 static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
3055 struct net *net = x ? xs_net(x) : c->net;
3056 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3058 if (atomic_read(&net_pfkey->socks_nr) == 0)
3062 case XFRM_MSG_EXPIRE:
3063 return key_notify_sa_expire(x, c);
3064 case XFRM_MSG_DELSA:
3065 case XFRM_MSG_NEWSA:
3066 case XFRM_MSG_UPDSA:
3067 return key_notify_sa(x, c);
3068 case XFRM_MSG_FLUSHSA:
3069 return key_notify_sa_flush(c);
3070 case XFRM_MSG_NEWAE: /* not yet supported */
3073 pr_err("pfkey: Unknown SA event %d\n", c->event);
3080 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3082 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3086 case XFRM_MSG_POLEXPIRE:
3087 return key_notify_policy_expire(xp, c);
3088 case XFRM_MSG_DELPOLICY:
3089 case XFRM_MSG_NEWPOLICY:
3090 case XFRM_MSG_UPDPOLICY:
3091 return key_notify_policy(xp, dir, c);
3092 case XFRM_MSG_FLUSHPOLICY:
3093 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3095 return key_notify_policy_flush(c);
3097 pr_err("pfkey: Unknown policy event %d\n", c->event);
3104 static u32 get_acqseq(void)
3107 static atomic_t acqseq;
3110 res = atomic_inc_return(&acqseq);
3115 static bool pfkey_is_alive(const struct km_event *c)
3117 struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id);
3119 bool is_alive = false;
3122 sk_for_each_rcu(sk, &net_pfkey->table) {
3123 if (pfkey_sk(sk)->registered) {
3133 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
3135 struct sk_buff *skb;
3136 struct sadb_msg *hdr;
3137 struct sadb_address *addr;
3138 struct sadb_x_policy *pol;
3141 struct sadb_x_sec_ctx *sec_ctx;
3142 struct xfrm_sec_ctx *xfrm_ctx;
3145 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3149 size = sizeof(struct sadb_msg) +
3150 (sizeof(struct sadb_address) * 2) +
3151 (sockaddr_size * 2) +
3152 sizeof(struct sadb_x_policy);
3154 if (x->id.proto == IPPROTO_AH)
3155 size += count_ah_combs(t);
3156 else if (x->id.proto == IPPROTO_ESP)
3157 size += count_esp_combs(t);
3159 if ((xfrm_ctx = x->security)) {
3160 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3161 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3164 skb = alloc_skb(size + 16, GFP_ATOMIC);
3168 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3169 hdr->sadb_msg_version = PF_KEY_V2;
3170 hdr->sadb_msg_type = SADB_ACQUIRE;
3171 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3172 hdr->sadb_msg_len = size / sizeof(uint64_t);
3173 hdr->sadb_msg_errno = 0;
3174 hdr->sadb_msg_reserved = 0;
3175 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3176 hdr->sadb_msg_pid = 0;
3179 addr = (struct sadb_address*) skb_put(skb,
3180 sizeof(struct sadb_address)+sockaddr_size);
3181 addr->sadb_address_len =
3182 (sizeof(struct sadb_address)+sockaddr_size)/
3184 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3185 addr->sadb_address_proto = 0;
3186 addr->sadb_address_reserved = 0;
3187 addr->sadb_address_prefixlen =
3188 pfkey_sockaddr_fill(&x->props.saddr, 0,
3189 (struct sockaddr *) (addr + 1),
3191 if (!addr->sadb_address_prefixlen)
3195 addr = (struct sadb_address*) skb_put(skb,
3196 sizeof(struct sadb_address)+sockaddr_size);
3197 addr->sadb_address_len =
3198 (sizeof(struct sadb_address)+sockaddr_size)/
3200 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3201 addr->sadb_address_proto = 0;
3202 addr->sadb_address_reserved = 0;
3203 addr->sadb_address_prefixlen =
3204 pfkey_sockaddr_fill(&x->id.daddr, 0,
3205 (struct sockaddr *) (addr + 1),
3207 if (!addr->sadb_address_prefixlen)
3210 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3211 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3212 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3213 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3214 pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
3215 pol->sadb_x_policy_reserved = 0;
3216 pol->sadb_x_policy_id = xp->index;
3217 pol->sadb_x_policy_priority = xp->priority;
3219 /* Set sadb_comb's. */
3220 if (x->id.proto == IPPROTO_AH)
3221 dump_ah_combs(skb, t);
3222 else if (x->id.proto == IPPROTO_ESP)
3223 dump_esp_combs(skb, t);
3225 /* security context */
3227 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3228 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3229 sec_ctx->sadb_x_sec_len =
3230 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3231 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3232 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3233 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3234 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3235 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3239 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3243 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3244 u8 *data, int len, int *dir)
3246 struct net *net = sock_net(sk);
3247 struct xfrm_policy *xp;
3248 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3249 struct sadb_x_sec_ctx *sec_ctx;
3251 switch (sk->sk_family) {
3253 if (opt != IP_IPSEC_POLICY) {
3258 #if IS_ENABLED(CONFIG_IPV6)
3260 if (opt != IPV6_IPSEC_POLICY) {
3273 if (len < sizeof(struct sadb_x_policy) ||
3274 pol->sadb_x_policy_len*8 > len ||
3275 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3276 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3279 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3285 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3286 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3288 xp->lft.soft_byte_limit = XFRM_INF;
3289 xp->lft.hard_byte_limit = XFRM_INF;
3290 xp->lft.soft_packet_limit = XFRM_INF;
3291 xp->lft.hard_packet_limit = XFRM_INF;
3292 xp->family = sk->sk_family;
3295 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3296 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3299 /* security context too */
3300 if (len >= (pol->sadb_x_policy_len*8 +
3301 sizeof(struct sadb_x_sec_ctx))) {
3302 char *p = (char *)pol;
3303 struct xfrm_user_sec_ctx *uctx;
3305 p += pol->sadb_x_policy_len*8;
3306 sec_ctx = (struct sadb_x_sec_ctx *)p;
3307 if (len < pol->sadb_x_policy_len*8 +
3308 sec_ctx->sadb_x_sec_len*8) {
3312 if ((*dir = verify_sec_ctx_len(p)))
3314 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC);
3315 *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC);
3322 *dir = pol->sadb_x_policy_dir-1;
3327 xfrm_policy_destroy(xp);
3331 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3333 struct sk_buff *skb;
3334 struct sadb_msg *hdr;
3336 struct sadb_address *addr;
3337 struct sadb_x_nat_t_port *n_port;
3340 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3341 struct xfrm_encap_tmpl *natt = NULL;
3343 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3355 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3357 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3358 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3361 size = sizeof(struct sadb_msg) +
3362 sizeof(struct sadb_sa) +
3363 (sizeof(struct sadb_address) * 2) +
3364 (sockaddr_size * 2) +
3365 (sizeof(struct sadb_x_nat_t_port) * 2);
3367 skb = alloc_skb(size + 16, GFP_ATOMIC);
3371 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3372 hdr->sadb_msg_version = PF_KEY_V2;
3373 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3374 hdr->sadb_msg_satype = satype;
3375 hdr->sadb_msg_len = size / sizeof(uint64_t);
3376 hdr->sadb_msg_errno = 0;
3377 hdr->sadb_msg_reserved = 0;
3378 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3379 hdr->sadb_msg_pid = 0;
3382 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3383 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3384 sa->sadb_sa_exttype = SADB_EXT_SA;
3385 sa->sadb_sa_spi = x->id.spi;
3386 sa->sadb_sa_replay = 0;
3387 sa->sadb_sa_state = 0;
3388 sa->sadb_sa_auth = 0;
3389 sa->sadb_sa_encrypt = 0;
3390 sa->sadb_sa_flags = 0;
3392 /* ADDRESS_SRC (old addr) */
3393 addr = (struct sadb_address*)
3394 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3395 addr->sadb_address_len =
3396 (sizeof(struct sadb_address)+sockaddr_size)/
3398 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3399 addr->sadb_address_proto = 0;
3400 addr->sadb_address_reserved = 0;
3401 addr->sadb_address_prefixlen =
3402 pfkey_sockaddr_fill(&x->props.saddr, 0,
3403 (struct sockaddr *) (addr + 1),
3405 if (!addr->sadb_address_prefixlen)
3408 /* NAT_T_SPORT (old port) */
3409 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3410 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3411 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3412 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3413 n_port->sadb_x_nat_t_port_reserved = 0;
3415 /* ADDRESS_DST (new addr) */
3416 addr = (struct sadb_address*)
3417 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3418 addr->sadb_address_len =
3419 (sizeof(struct sadb_address)+sockaddr_size)/
3421 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3422 addr->sadb_address_proto = 0;
3423 addr->sadb_address_reserved = 0;
3424 addr->sadb_address_prefixlen =
3425 pfkey_sockaddr_fill(ipaddr, 0,
3426 (struct sockaddr *) (addr + 1),
3428 if (!addr->sadb_address_prefixlen)
3431 /* NAT_T_DPORT (new port) */
3432 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3433 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3434 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3435 n_port->sadb_x_nat_t_port_port = sport;
3436 n_port->sadb_x_nat_t_port_reserved = 0;
3438 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3442 #ifdef CONFIG_NET_KEY_MIGRATE
3443 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3444 const struct xfrm_selector *sel)
3446 struct sadb_address *addr;
3447 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3448 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3449 addr->sadb_address_exttype = type;
3450 addr->sadb_address_proto = sel->proto;
3451 addr->sadb_address_reserved = 0;
3454 case SADB_EXT_ADDRESS_SRC:
3455 addr->sadb_address_prefixlen = sel->prefixlen_s;
3456 pfkey_sockaddr_fill(&sel->saddr, 0,
3457 (struct sockaddr *)(addr + 1),
3460 case SADB_EXT_ADDRESS_DST:
3461 addr->sadb_address_prefixlen = sel->prefixlen_d;
3462 pfkey_sockaddr_fill(&sel->daddr, 0,
3463 (struct sockaddr *)(addr + 1),
3474 static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
3476 struct sadb_x_kmaddress *kma;
3478 int family = k->family;
3479 int socklen = pfkey_sockaddr_len(family);
3482 size_req = (sizeof(struct sadb_x_kmaddress) +
3483 pfkey_sockaddr_pair_size(family));
3485 kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req);
3486 memset(kma, 0, size_req);
3487 kma->sadb_x_kmaddress_len = size_req / 8;
3488 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3489 kma->sadb_x_kmaddress_reserved = k->reserved;
3491 sa = (u8 *)(kma + 1);
3492 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3493 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3499 static int set_ipsecrequest(struct sk_buff *skb,
3500 uint8_t proto, uint8_t mode, int level,
3501 uint32_t reqid, uint8_t family,
3502 const xfrm_address_t *src, const xfrm_address_t *dst)
3504 struct sadb_x_ipsecrequest *rq;
3506 int socklen = pfkey_sockaddr_len(family);
3509 size_req = sizeof(struct sadb_x_ipsecrequest) +
3510 pfkey_sockaddr_pair_size(family);
3512 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3513 memset(rq, 0, size_req);
3514 rq->sadb_x_ipsecrequest_len = size_req;
3515 rq->sadb_x_ipsecrequest_proto = proto;
3516 rq->sadb_x_ipsecrequest_mode = mode;
3517 rq->sadb_x_ipsecrequest_level = level;
3518 rq->sadb_x_ipsecrequest_reqid = reqid;
3520 sa = (u8 *) (rq + 1);
3521 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3522 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3529 #ifdef CONFIG_NET_KEY_MIGRATE
3530 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3531 const struct xfrm_migrate *m, int num_bundles,
3532 const struct xfrm_kmaddress *k)
3538 struct sk_buff *skb;
3539 struct sadb_msg *hdr;
3540 struct sadb_x_policy *pol;
3541 const struct xfrm_migrate *mp;
3543 if (type != XFRM_POLICY_TYPE_MAIN)
3546 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3550 /* addresses for KM */
3551 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3552 pfkey_sockaddr_pair_size(k->family));
3556 sasize_sel = pfkey_sockaddr_size(sel->family);
3559 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3562 size_pol += sizeof(struct sadb_x_policy);
3565 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3566 /* old locator pair */
3567 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3568 pfkey_sockaddr_pair_size(mp->old_family);
3569 /* new locator pair */
3570 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3571 pfkey_sockaddr_pair_size(mp->new_family);
3574 size += sizeof(struct sadb_msg) + size_pol;
3577 skb = alloc_skb(size, GFP_ATOMIC);
3581 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3582 hdr->sadb_msg_version = PF_KEY_V2;
3583 hdr->sadb_msg_type = SADB_X_MIGRATE;
3584 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3585 hdr->sadb_msg_len = size / 8;
3586 hdr->sadb_msg_errno = 0;
3587 hdr->sadb_msg_reserved = 0;
3588 hdr->sadb_msg_seq = 0;
3589 hdr->sadb_msg_pid = 0;
3591 /* Addresses to be used by KM for negotiation, if ext is available */
3592 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3596 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3599 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3601 /* policy information */
3602 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3603 pol->sadb_x_policy_len = size_pol / 8;
3604 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3605 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3606 pol->sadb_x_policy_dir = dir + 1;
3607 pol->sadb_x_policy_reserved = 0;
3608 pol->sadb_x_policy_id = 0;
3609 pol->sadb_x_policy_priority = 0;
3611 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3612 /* old ipsecrequest */
3613 int mode = pfkey_mode_from_xfrm(mp->mode);
3616 if (set_ipsecrequest(skb, mp->proto, mode,
3617 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3618 mp->reqid, mp->old_family,
3619 &mp->old_saddr, &mp->old_daddr) < 0)
3622 /* new ipsecrequest */
3623 if (set_ipsecrequest(skb, mp->proto, mode,
3624 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3625 mp->reqid, mp->new_family,
3626 &mp->new_saddr, &mp->new_daddr) < 0)
3630 /* broadcast migrate message to sockets */
3631 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
3640 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3641 const struct xfrm_migrate *m, int num_bundles,
3642 const struct xfrm_kmaddress *k)
3644 return -ENOPROTOOPT;
3648 static int pfkey_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
3650 struct sock *sk = sock->sk;
3651 struct sk_buff *skb = NULL;
3652 struct sadb_msg *hdr = NULL;
3654 struct net *net = sock_net(sk);
3657 if (msg->msg_flags & MSG_OOB)
3661 if ((unsigned int)len > sk->sk_sndbuf - 32)
3665 skb = alloc_skb(len, GFP_KERNEL);
3670 if (memcpy_from_msg(skb_put(skb,len), msg, len))
3673 hdr = pfkey_get_base_msg(skb, &err);
3677 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
3678 err = pfkey_process(sk, skb, hdr);
3679 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
3682 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3689 static int pfkey_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
3692 struct sock *sk = sock->sk;
3693 struct pfkey_sock *pfk = pfkey_sk(sk);
3694 struct sk_buff *skb;
3698 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3701 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3707 msg->msg_flags |= MSG_TRUNC;
3711 skb_reset_transport_header(skb);
3712 err = skb_copy_datagram_msg(skb, 0, msg, copied);
3716 sock_recv_ts_and_drops(msg, sk, skb);
3718 err = (flags & MSG_TRUNC) ? skb->len : copied;
3720 if (pfk->dump.dump != NULL &&
3721 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3725 skb_free_datagram(sk, skb);
3730 static const struct proto_ops pfkey_ops = {
3732 .owner = THIS_MODULE,
3733 /* Operations that make no sense on pfkey sockets. */
3734 .bind = sock_no_bind,
3735 .connect = sock_no_connect,
3736 .socketpair = sock_no_socketpair,
3737 .accept = sock_no_accept,
3738 .getname = sock_no_getname,
3739 .ioctl = sock_no_ioctl,
3740 .listen = sock_no_listen,
3741 .shutdown = sock_no_shutdown,
3742 .setsockopt = sock_no_setsockopt,
3743 .getsockopt = sock_no_getsockopt,
3744 .mmap = sock_no_mmap,
3745 .sendpage = sock_no_sendpage,
3747 /* Now the operations that really occur. */
3748 .release = pfkey_release,
3749 .poll = datagram_poll,
3750 .sendmsg = pfkey_sendmsg,
3751 .recvmsg = pfkey_recvmsg,
3754 static const struct net_proto_family pfkey_family_ops = {
3756 .create = pfkey_create,
3757 .owner = THIS_MODULE,
3760 #ifdef CONFIG_PROC_FS
3761 static int pfkey_seq_show(struct seq_file *f, void *v)
3763 struct sock *s = sk_entry(v);
3765 if (v == SEQ_START_TOKEN)
3766 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3768 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
3770 atomic_read(&s->sk_refcnt),
3771 sk_rmem_alloc_get(s),
3772 sk_wmem_alloc_get(s),
3773 from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
3779 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3782 struct net *net = seq_file_net(f);
3783 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3786 return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
3789 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3791 struct net *net = seq_file_net(f);
3792 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3794 return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
3797 static void pfkey_seq_stop(struct seq_file *f, void *v)
3803 static const struct seq_operations pfkey_seq_ops = {
3804 .start = pfkey_seq_start,
3805 .next = pfkey_seq_next,
3806 .stop = pfkey_seq_stop,
3807 .show = pfkey_seq_show,
3810 static int pfkey_seq_open(struct inode *inode, struct file *file)
3812 return seq_open_net(inode, file, &pfkey_seq_ops,
3813 sizeof(struct seq_net_private));
3816 static const struct file_operations pfkey_proc_ops = {
3817 .open = pfkey_seq_open,
3819 .llseek = seq_lseek,
3820 .release = seq_release_net,
3823 static int __net_init pfkey_init_proc(struct net *net)
3825 struct proc_dir_entry *e;
3827 e = proc_create("pfkey", 0, net->proc_net, &pfkey_proc_ops);
3834 static void __net_exit pfkey_exit_proc(struct net *net)
3836 remove_proc_entry("pfkey", net->proc_net);
3839 static inline int pfkey_init_proc(struct net *net)
3844 static inline void pfkey_exit_proc(struct net *net)
3849 static struct xfrm_mgr pfkeyv2_mgr =
3852 .notify = pfkey_send_notify,
3853 .acquire = pfkey_send_acquire,
3854 .compile_policy = pfkey_compile_policy,
3855 .new_mapping = pfkey_send_new_mapping,
3856 .notify_policy = pfkey_send_policy_notify,
3857 .migrate = pfkey_send_migrate,
3858 .is_alive = pfkey_is_alive,
3861 static int __net_init pfkey_net_init(struct net *net)
3863 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3866 INIT_HLIST_HEAD(&net_pfkey->table);
3867 atomic_set(&net_pfkey->socks_nr, 0);
3869 rv = pfkey_init_proc(net);
3874 static void __net_exit pfkey_net_exit(struct net *net)
3876 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3878 pfkey_exit_proc(net);
3879 BUG_ON(!hlist_empty(&net_pfkey->table));
3882 static struct pernet_operations pfkey_net_ops = {
3883 .init = pfkey_net_init,
3884 .exit = pfkey_net_exit,
3885 .id = &pfkey_net_id,
3886 .size = sizeof(struct netns_pfkey),
3889 static void __exit ipsec_pfkey_exit(void)
3891 xfrm_unregister_km(&pfkeyv2_mgr);
3892 sock_unregister(PF_KEY);
3893 unregister_pernet_subsys(&pfkey_net_ops);
3894 proto_unregister(&key_proto);
3897 static int __init ipsec_pfkey_init(void)
3899 int err = proto_register(&key_proto, 0);
3904 err = register_pernet_subsys(&pfkey_net_ops);
3906 goto out_unregister_key_proto;
3907 err = sock_register(&pfkey_family_ops);
3909 goto out_unregister_pernet;
3910 err = xfrm_register_km(&pfkeyv2_mgr);
3912 goto out_sock_unregister;
3916 out_sock_unregister:
3917 sock_unregister(PF_KEY);
3918 out_unregister_pernet:
3919 unregister_pernet_subsys(&pfkey_net_ops);
3920 out_unregister_key_proto:
3921 proto_unregister(&key_proto);
3925 module_init(ipsec_pfkey_init);
3926 module_exit(ipsec_pfkey_exit);
3927 MODULE_LICENSE("GPL");
3928 MODULE_ALIAS_NETPROTO(PF_KEY);