2 * net/key/af_key.c An implementation of PF_KEYv2 sockets.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
9 * Authors: Maxim Giryaev <gem@asplinux.ru>
10 * David S. Miller <davem@redhat.com>
11 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
12 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
14 * Derek Atkins <derek@ihtfp.com>
17 #include <linux/capability.h>
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/socket.h>
21 #include <linux/pfkeyv2.h>
22 #include <linux/ipsec.h>
23 #include <linux/skbuff.h>
24 #include <linux/rtnetlink.h>
26 #include <linux/in6.h>
27 #include <linux/proc_fs.h>
28 #include <linux/init.h>
29 #include <linux/slab.h>
30 #include <net/net_namespace.h>
31 #include <net/netns/generic.h>
36 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
37 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
39 static unsigned int pfkey_net_id __read_mostly;
41 /* List of all pfkey sockets. */
42 struct hlist_head table;
45 static DEFINE_MUTEX(pfkey_mutex);
48 static const struct xfrm_mark dummy_mark = {0, 0};
50 /* struct sock must be the first member of struct pfkey_sock */
58 int (*dump)(struct pfkey_sock *sk);
59 void (*done)(struct pfkey_sock *sk);
61 struct xfrm_policy_walk policy;
62 struct xfrm_state_walk state;
66 struct mutex dump_lock;
69 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
70 xfrm_address_t *saddr, xfrm_address_t *daddr,
73 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
75 return (struct pfkey_sock *)sk;
78 static int pfkey_can_dump(const struct sock *sk)
80 if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
85 static void pfkey_terminate_dump(struct pfkey_sock *pfk)
89 kfree_skb(pfk->dump.skb);
93 pfk->dump.dump = NULL;
94 pfk->dump.done = NULL;
98 static void pfkey_sock_destruct(struct sock *sk)
100 struct net *net = sock_net(sk);
101 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
103 pfkey_terminate_dump(pfkey_sk(sk));
104 skb_queue_purge(&sk->sk_receive_queue);
106 if (!sock_flag(sk, SOCK_DEAD)) {
107 pr_err("Attempt to release alive pfkey socket: %p\n", sk);
111 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
112 WARN_ON(refcount_read(&sk->sk_wmem_alloc));
114 atomic_dec(&net_pfkey->socks_nr);
117 static const struct proto_ops pfkey_ops;
119 static void pfkey_insert(struct sock *sk)
121 struct net *net = sock_net(sk);
122 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
124 mutex_lock(&pfkey_mutex);
125 sk_add_node_rcu(sk, &net_pfkey->table);
126 mutex_unlock(&pfkey_mutex);
129 static void pfkey_remove(struct sock *sk)
131 mutex_lock(&pfkey_mutex);
132 sk_del_node_init_rcu(sk);
133 mutex_unlock(&pfkey_mutex);
136 static struct proto key_proto = {
138 .owner = THIS_MODULE,
139 .obj_size = sizeof(struct pfkey_sock),
142 static int pfkey_create(struct net *net, struct socket *sock, int protocol,
145 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
147 struct pfkey_sock *pfk;
150 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
152 if (sock->type != SOCK_RAW)
153 return -ESOCKTNOSUPPORT;
154 if (protocol != PF_KEY_V2)
155 return -EPROTONOSUPPORT;
158 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto, kern);
163 mutex_init(&pfk->dump_lock);
165 sock->ops = &pfkey_ops;
166 sock_init_data(sock, sk);
168 sk->sk_family = PF_KEY;
169 sk->sk_destruct = pfkey_sock_destruct;
171 atomic_inc(&net_pfkey->socks_nr);
180 static int pfkey_release(struct socket *sock)
182 struct sock *sk = sock->sk;
191 skb_queue_purge(&sk->sk_write_queue);
199 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
200 gfp_t allocation, struct sock *sk)
206 if (refcount_read(&skb->users) != 1) {
207 *skb2 = skb_clone(skb, allocation);
210 refcount_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 = 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 = 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 = 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 = skb_put(skb, sizeof(struct sadb_lifetime));
874 lifetime->sadb_lifetime_len =
875 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
876 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
877 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
878 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
879 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
880 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
884 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
885 lifetime->sadb_lifetime_len =
886 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
887 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
888 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
889 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
890 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
891 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
894 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
895 lifetime->sadb_lifetime_len =
896 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
897 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
898 lifetime->sadb_lifetime_allocations = x->curlft.packets;
899 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
900 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
901 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
903 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
904 addr->sadb_address_len =
905 (sizeof(struct sadb_address)+sockaddr_size)/
907 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
908 /* "if the ports are non-zero, then the sadb_address_proto field,
909 normally zero, MUST be filled in with the transport
910 protocol's number." - RFC2367 */
911 addr->sadb_address_proto = 0;
912 addr->sadb_address_reserved = 0;
914 addr->sadb_address_prefixlen =
915 pfkey_sockaddr_fill(&x->props.saddr, 0,
916 (struct sockaddr *) (addr + 1),
918 if (!addr->sadb_address_prefixlen)
922 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
923 addr->sadb_address_len =
924 (sizeof(struct sadb_address)+sockaddr_size)/
926 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
927 addr->sadb_address_proto = 0;
928 addr->sadb_address_reserved = 0;
930 addr->sadb_address_prefixlen =
931 pfkey_sockaddr_fill(&x->id.daddr, 0,
932 (struct sockaddr *) (addr + 1),
934 if (!addr->sadb_address_prefixlen)
937 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr,
940 sizeof(struct sadb_address) + sockaddr_size);
941 addr->sadb_address_len =
942 (sizeof(struct sadb_address)+sockaddr_size)/
944 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
945 addr->sadb_address_proto =
946 pfkey_proto_from_xfrm(x->sel.proto);
947 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
948 addr->sadb_address_reserved = 0;
950 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
951 (struct sockaddr *) (addr + 1),
956 if (add_keys && auth_key_size) {
957 key = skb_put(skb, sizeof(struct sadb_key) + auth_key_size);
958 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
960 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
961 key->sadb_key_bits = x->aalg->alg_key_len;
962 key->sadb_key_reserved = 0;
963 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
966 if (add_keys && encrypt_key_size) {
967 key = skb_put(skb, sizeof(struct sadb_key) + encrypt_key_size);
968 key->sadb_key_len = (sizeof(struct sadb_key) +
969 encrypt_key_size) / sizeof(uint64_t);
970 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
971 key->sadb_key_bits = x->ealg->alg_key_len;
972 key->sadb_key_reserved = 0;
973 memcpy(key + 1, x->ealg->alg_key,
974 (x->ealg->alg_key_len+7)/8);
978 sa2 = skb_put(skb, sizeof(struct sadb_x_sa2));
979 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
980 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
981 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
983 return ERR_PTR(-EINVAL);
985 sa2->sadb_x_sa2_mode = mode;
986 sa2->sadb_x_sa2_reserved1 = 0;
987 sa2->sadb_x_sa2_reserved2 = 0;
988 sa2->sadb_x_sa2_sequence = 0;
989 sa2->sadb_x_sa2_reqid = x->props.reqid;
991 if (natt && natt->encap_type) {
992 struct sadb_x_nat_t_type *n_type;
993 struct sadb_x_nat_t_port *n_port;
996 n_type = skb_put(skb, sizeof(*n_type));
997 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
998 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
999 n_type->sadb_x_nat_t_type_type = natt->encap_type;
1000 n_type->sadb_x_nat_t_type_reserved[0] = 0;
1001 n_type->sadb_x_nat_t_type_reserved[1] = 0;
1002 n_type->sadb_x_nat_t_type_reserved[2] = 0;
1005 n_port = skb_put(skb, sizeof(*n_port));
1006 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1007 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
1008 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
1009 n_port->sadb_x_nat_t_port_reserved = 0;
1012 n_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_DPORT;
1015 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
1016 n_port->sadb_x_nat_t_port_reserved = 0;
1019 /* security context */
1021 sec_ctx = skb_put(skb,
1022 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1023 sec_ctx->sadb_x_sec_len =
1024 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1025 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1026 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1027 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1028 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1029 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1037 static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x)
1039 struct sk_buff *skb;
1041 skb = __pfkey_xfrm_state2msg(x, 1, 3);
1046 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x,
1049 return __pfkey_xfrm_state2msg(x, 0, hsc);
1052 static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
1053 const struct sadb_msg *hdr,
1054 void * const *ext_hdrs)
1056 struct xfrm_state *x;
1057 const struct sadb_lifetime *lifetime;
1058 const struct sadb_sa *sa;
1059 const struct sadb_key *key;
1060 const struct sadb_x_sec_ctx *sec_ctx;
1065 sa = ext_hdrs[SADB_EXT_SA - 1];
1067 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1068 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1069 return ERR_PTR(-EINVAL);
1070 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1071 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1072 return ERR_PTR(-EINVAL);
1073 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1074 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1075 return ERR_PTR(-EINVAL);
1076 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1077 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1078 return ERR_PTR(-EINVAL);
1080 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1082 return ERR_PTR(-EINVAL);
1084 /* default error is no buffer space */
1089 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1090 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1091 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1092 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1093 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1096 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1097 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1099 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1100 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1101 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1102 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1103 return ERR_PTR(-EINVAL);
1104 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1106 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1107 ((key->sadb_key_bits+7) / 8 == 0 ||
1108 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1109 return ERR_PTR(-EINVAL);
1110 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1112 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1113 ((key->sadb_key_bits+7) / 8 == 0 ||
1114 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1115 return ERR_PTR(-EINVAL);
1117 x = xfrm_state_alloc(net);
1119 return ERR_PTR(-ENOBUFS);
1121 x->id.proto = proto;
1122 x->id.spi = sa->sadb_sa_spi;
1123 x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay,
1124 (sizeof(x->replay.bitmap) * 8));
1125 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1126 x->props.flags |= XFRM_STATE_NOECN;
1127 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1128 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1129 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1130 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1132 lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1];
1133 if (lifetime != NULL) {
1134 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1135 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1136 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1137 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1139 lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1];
1140 if (lifetime != NULL) {
1141 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1142 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1143 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1144 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1147 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
1148 if (sec_ctx != NULL) {
1149 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
1154 err = security_xfrm_state_alloc(x, uctx);
1162 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1163 if (sa->sadb_sa_auth) {
1165 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1166 if (!a || !a->pfkey_supported) {
1171 keysize = (key->sadb_key_bits + 7) / 8;
1172 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1177 strcpy(x->aalg->alg_name, a->name);
1178 x->aalg->alg_key_len = 0;
1180 x->aalg->alg_key_len = key->sadb_key_bits;
1181 memcpy(x->aalg->alg_key, key+1, keysize);
1183 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1184 x->props.aalgo = sa->sadb_sa_auth;
1185 /* x->algo.flags = sa->sadb_sa_flags; */
1187 if (sa->sadb_sa_encrypt) {
1188 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1189 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1190 if (!a || !a->pfkey_supported) {
1194 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1199 strcpy(x->calg->alg_name, a->name);
1200 x->props.calgo = sa->sadb_sa_encrypt;
1203 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1204 if (!a || !a->pfkey_supported) {
1208 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1210 keysize = (key->sadb_key_bits + 7) / 8;
1211 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1216 strcpy(x->ealg->alg_name, a->name);
1217 x->ealg->alg_key_len = 0;
1219 x->ealg->alg_key_len = key->sadb_key_bits;
1220 memcpy(x->ealg->alg_key, key+1, keysize);
1222 x->props.ealgo = sa->sadb_sa_encrypt;
1223 x->geniv = a->uinfo.encr.geniv;
1226 /* x->algo.flags = sa->sadb_sa_flags; */
1228 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1230 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1233 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1234 const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
1235 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1240 x->props.mode = mode;
1241 x->props.reqid = sa2->sadb_x_sa2_reqid;
1244 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1245 const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1247 /* Nobody uses this, but we try. */
1248 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1249 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1253 x->sel.family = x->props.family;
1255 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1256 const struct sadb_x_nat_t_type* n_type;
1257 struct xfrm_encap_tmpl *natt;
1259 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1266 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1267 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1269 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1270 const struct sadb_x_nat_t_port *n_port =
1271 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1272 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1274 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1275 const struct sadb_x_nat_t_port *n_port =
1276 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1277 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1279 memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
1282 err = xfrm_init_state(x);
1286 x->km.seq = hdr->sadb_msg_seq;
1290 x->km.state = XFRM_STATE_DEAD;
1292 return ERR_PTR(err);
1295 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1300 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1302 struct net *net = sock_net(sk);
1303 struct sk_buff *resp_skb;
1304 struct sadb_x_sa2 *sa2;
1305 struct sadb_address *saddr, *daddr;
1306 struct sadb_msg *out_hdr;
1307 struct sadb_spirange *range;
1308 struct xfrm_state *x = NULL;
1311 u32 min_spi, max_spi;
1314 unsigned short family;
1315 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1317 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1318 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1321 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1325 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1326 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1329 reqid = sa2->sadb_x_sa2_reqid;
1335 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1336 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1338 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1341 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1342 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1344 #if IS_ENABLED(CONFIG_IPV6)
1346 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1347 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1352 if (hdr->sadb_msg_seq) {
1353 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1354 if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) {
1361 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family);
1367 max_spi = 0x0fffffff;
1369 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1371 min_spi = range->sadb_spirange_min;
1372 max_spi = range->sadb_spirange_max;
1375 err = verify_spi_info(x->id.proto, min_spi, max_spi);
1381 err = xfrm_alloc_spi(x, min_spi, max_spi);
1382 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1384 if (IS_ERR(resp_skb)) {
1386 return PTR_ERR(resp_skb);
1389 out_hdr = (struct sadb_msg *) resp_skb->data;
1390 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1391 out_hdr->sadb_msg_type = SADB_GETSPI;
1392 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1393 out_hdr->sadb_msg_errno = 0;
1394 out_hdr->sadb_msg_reserved = 0;
1395 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1396 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1400 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
1405 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1407 struct net *net = sock_net(sk);
1408 struct xfrm_state *x;
1410 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1413 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1416 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1420 spin_lock_bh(&x->lock);
1421 if (x->km.state == XFRM_STATE_ACQ)
1422 x->km.state = XFRM_STATE_ERROR;
1424 spin_unlock_bh(&x->lock);
1429 static inline int event2poltype(int event)
1432 case XFRM_MSG_DELPOLICY:
1433 return SADB_X_SPDDELETE;
1434 case XFRM_MSG_NEWPOLICY:
1435 return SADB_X_SPDADD;
1436 case XFRM_MSG_UPDPOLICY:
1437 return SADB_X_SPDUPDATE;
1438 case XFRM_MSG_POLEXPIRE:
1439 // return SADB_X_SPDEXPIRE;
1441 pr_err("pfkey: Unknown policy event %d\n", event);
1448 static inline int event2keytype(int event)
1451 case XFRM_MSG_DELSA:
1453 case XFRM_MSG_NEWSA:
1455 case XFRM_MSG_UPDSA:
1457 case XFRM_MSG_EXPIRE:
1460 pr_err("pfkey: Unknown SA event %d\n", event);
1468 static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
1470 struct sk_buff *skb;
1471 struct sadb_msg *hdr;
1473 skb = pfkey_xfrm_state2msg(x);
1476 return PTR_ERR(skb);
1478 hdr = (struct sadb_msg *) skb->data;
1479 hdr->sadb_msg_version = PF_KEY_V2;
1480 hdr->sadb_msg_type = event2keytype(c->event);
1481 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1482 hdr->sadb_msg_errno = 0;
1483 hdr->sadb_msg_reserved = 0;
1484 hdr->sadb_msg_seq = c->seq;
1485 hdr->sadb_msg_pid = c->portid;
1487 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
1492 static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1494 struct net *net = sock_net(sk);
1495 struct xfrm_state *x;
1499 x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1504 if (hdr->sadb_msg_type == SADB_ADD)
1505 err = xfrm_state_add(x);
1507 err = xfrm_state_update(x);
1509 xfrm_audit_state_add(x, err ? 0 : 1, true);
1512 x->km.state = XFRM_STATE_DEAD;
1513 __xfrm_state_put(x);
1517 if (hdr->sadb_msg_type == SADB_ADD)
1518 c.event = XFRM_MSG_NEWSA;
1520 c.event = XFRM_MSG_UPDSA;
1521 c.seq = hdr->sadb_msg_seq;
1522 c.portid = hdr->sadb_msg_pid;
1523 km_state_notify(x, &c);
1529 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1531 struct net *net = sock_net(sk);
1532 struct xfrm_state *x;
1536 if (!ext_hdrs[SADB_EXT_SA-1] ||
1537 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1538 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1541 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1545 if ((err = security_xfrm_state_delete(x)))
1548 if (xfrm_state_kern(x)) {
1553 err = xfrm_state_delete(x);
1558 c.seq = hdr->sadb_msg_seq;
1559 c.portid = hdr->sadb_msg_pid;
1560 c.event = XFRM_MSG_DELSA;
1561 km_state_notify(x, &c);
1563 xfrm_audit_state_delete(x, err ? 0 : 1, true);
1569 static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1571 struct net *net = sock_net(sk);
1573 struct sk_buff *out_skb;
1574 struct sadb_msg *out_hdr;
1575 struct xfrm_state *x;
1577 if (!ext_hdrs[SADB_EXT_SA-1] ||
1578 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1579 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1582 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1586 out_skb = pfkey_xfrm_state2msg(x);
1587 proto = x->id.proto;
1589 if (IS_ERR(out_skb))
1590 return PTR_ERR(out_skb);
1592 out_hdr = (struct sadb_msg *) out_skb->data;
1593 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1594 out_hdr->sadb_msg_type = SADB_GET;
1595 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1596 out_hdr->sadb_msg_errno = 0;
1597 out_hdr->sadb_msg_reserved = 0;
1598 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1599 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1600 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1605 static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
1608 struct sk_buff *skb;
1609 struct sadb_msg *hdr;
1610 int len, auth_len, enc_len, i;
1612 auth_len = xfrm_count_pfkey_auth_supported();
1614 auth_len *= sizeof(struct sadb_alg);
1615 auth_len += sizeof(struct sadb_supported);
1618 enc_len = xfrm_count_pfkey_enc_supported();
1620 enc_len *= sizeof(struct sadb_alg);
1621 enc_len += sizeof(struct sadb_supported);
1624 len = enc_len + auth_len + sizeof(struct sadb_msg);
1626 skb = alloc_skb(len + 16, allocation);
1630 hdr = skb_put(skb, sizeof(*hdr));
1631 pfkey_hdr_dup(hdr, orig);
1632 hdr->sadb_msg_errno = 0;
1633 hdr->sadb_msg_len = len / sizeof(uint64_t);
1636 struct sadb_supported *sp;
1637 struct sadb_alg *ap;
1639 sp = skb_put(skb, auth_len);
1640 ap = (struct sadb_alg *) (sp + 1);
1642 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1643 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1645 for (i = 0; ; i++) {
1646 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1649 if (!aalg->pfkey_supported)
1651 if (aalg->available)
1657 struct sadb_supported *sp;
1658 struct sadb_alg *ap;
1660 sp = skb_put(skb, enc_len);
1661 ap = (struct sadb_alg *) (sp + 1);
1663 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1664 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1666 for (i = 0; ; i++) {
1667 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1670 if (!ealg->pfkey_supported)
1672 if (ealg->available)
1681 static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1683 struct pfkey_sock *pfk = pfkey_sk(sk);
1684 struct sk_buff *supp_skb;
1686 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1689 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1690 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1692 pfk->registered |= (1<<hdr->sadb_msg_satype);
1697 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1699 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1700 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1705 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk,
1710 static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
1712 struct sk_buff *skb;
1713 struct sadb_msg *hdr;
1715 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1719 hdr = skb_put_data(skb, ihdr, sizeof(struct sadb_msg));
1720 hdr->sadb_msg_errno = (uint8_t) 0;
1721 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1723 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk,
1727 static int key_notify_sa_flush(const struct km_event *c)
1729 struct sk_buff *skb;
1730 struct sadb_msg *hdr;
1732 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1735 hdr = skb_put(skb, sizeof(struct sadb_msg));
1736 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1737 hdr->sadb_msg_type = SADB_FLUSH;
1738 hdr->sadb_msg_seq = c->seq;
1739 hdr->sadb_msg_pid = c->portid;
1740 hdr->sadb_msg_version = PF_KEY_V2;
1741 hdr->sadb_msg_errno = (uint8_t) 0;
1742 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1743 hdr->sadb_msg_reserved = 0;
1745 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
1750 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1752 struct net *net = sock_net(sk);
1757 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1761 err = xfrm_state_flush(net, proto, true);
1762 err2 = unicast_flush_resp(sk, hdr);
1764 if (err == -ESRCH) /* empty table - go quietly */
1766 return err ? err : err2;
1769 c.data.proto = proto;
1770 c.seq = hdr->sadb_msg_seq;
1771 c.portid = hdr->sadb_msg_pid;
1772 c.event = XFRM_MSG_FLUSHSA;
1774 km_state_notify(NULL, &c);
1779 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1781 struct pfkey_sock *pfk = ptr;
1782 struct sk_buff *out_skb;
1783 struct sadb_msg *out_hdr;
1785 if (!pfkey_can_dump(&pfk->sk))
1788 out_skb = pfkey_xfrm_state2msg(x);
1789 if (IS_ERR(out_skb))
1790 return PTR_ERR(out_skb);
1792 out_hdr = (struct sadb_msg *) out_skb->data;
1793 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1794 out_hdr->sadb_msg_type = SADB_DUMP;
1795 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1796 out_hdr->sadb_msg_errno = 0;
1797 out_hdr->sadb_msg_reserved = 0;
1798 out_hdr->sadb_msg_seq = count + 1;
1799 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
1802 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
1803 &pfk->sk, sock_net(&pfk->sk));
1804 pfk->dump.skb = out_skb;
1809 static int pfkey_dump_sa(struct pfkey_sock *pfk)
1811 struct net *net = sock_net(&pfk->sk);
1812 return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1815 static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1817 struct net *net = sock_net(&pfk->sk);
1819 xfrm_state_walk_done(&pfk->dump.u.state, net);
1822 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1825 struct xfrm_address_filter *filter = NULL;
1826 struct pfkey_sock *pfk = pfkey_sk(sk);
1828 mutex_lock(&pfk->dump_lock);
1829 if (pfk->dump.dump != NULL) {
1830 mutex_unlock(&pfk->dump_lock);
1834 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1836 mutex_unlock(&pfk->dump_lock);
1840 if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
1841 struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
1843 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
1844 if (filter == NULL) {
1845 mutex_unlock(&pfk->dump_lock);
1849 memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr,
1850 sizeof(xfrm_address_t));
1851 memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr,
1852 sizeof(xfrm_address_t));
1853 filter->family = xfilter->sadb_x_filter_family;
1854 filter->splen = xfilter->sadb_x_filter_splen;
1855 filter->dplen = xfilter->sadb_x_filter_dplen;
1858 pfk->dump.msg_version = hdr->sadb_msg_version;
1859 pfk->dump.msg_portid = hdr->sadb_msg_pid;
1860 pfk->dump.dump = pfkey_dump_sa;
1861 pfk->dump.done = pfkey_dump_sa_done;
1862 xfrm_state_walk_init(&pfk->dump.u.state, proto, filter);
1863 mutex_unlock(&pfk->dump_lock);
1865 return pfkey_do_dump(pfk);
1868 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1870 struct pfkey_sock *pfk = pfkey_sk(sk);
1871 int satype = hdr->sadb_msg_satype;
1872 bool reset_errno = false;
1874 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1876 if (satype != 0 && satype != 1)
1878 pfk->promisc = satype;
1880 if (reset_errno && skb_cloned(skb))
1881 skb = skb_copy(skb, GFP_KERNEL);
1883 skb = skb_clone(skb, GFP_KERNEL);
1885 if (reset_errno && skb) {
1886 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1887 new_hdr->sadb_msg_errno = 0;
1890 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
1894 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1897 u32 reqid = *(u32*)ptr;
1899 for (i=0; i<xp->xfrm_nr; i++) {
1900 if (xp->xfrm_vec[i].reqid == reqid)
1906 static u32 gen_reqid(struct net *net)
1908 struct xfrm_policy_walk walk;
1911 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1917 reqid = IPSEC_MANUAL_REQID_MAX+1;
1918 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1919 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1920 xfrm_policy_walk_done(&walk, net);
1923 } while (reqid != start);
1928 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1930 struct net *net = xp_net(xp);
1931 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1934 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1937 if (rq->sadb_x_ipsecrequest_mode == 0)
1940 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1941 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1944 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1946 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1947 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1948 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1950 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1954 /* addresses present only in tunnel mode */
1955 if (t->mode == XFRM_MODE_TUNNEL) {
1958 err = parse_sockaddr_pair(
1959 (struct sockaddr *)(rq + 1),
1960 rq->sadb_x_ipsecrequest_len - sizeof(*rq),
1961 &t->saddr, &t->id.daddr, &t->encap_family);
1965 t->encap_family = xp->family;
1967 /* No way to set this via kame pfkey */
1974 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1977 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1978 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1980 if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
1983 while (len >= sizeof(*rq)) {
1984 if (len < rq->sadb_x_ipsecrequest_len ||
1985 rq->sadb_x_ipsecrequest_len < sizeof(*rq))
1988 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1990 len -= rq->sadb_x_ipsecrequest_len;
1991 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1996 static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
1998 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
2001 int len = sizeof(struct sadb_x_sec_ctx);
2002 len += xfrm_ctx->ctx_len;
2003 return PFKEY_ALIGN8(len);
2008 static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
2010 const struct xfrm_tmpl *t;
2011 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2015 for (i=0; i<xp->xfrm_nr; i++) {
2016 t = xp->xfrm_vec + i;
2017 socklen += pfkey_sockaddr_len(t->encap_family);
2020 return sizeof(struct sadb_msg) +
2021 (sizeof(struct sadb_lifetime) * 3) +
2022 (sizeof(struct sadb_address) * 2) +
2023 (sockaddr_size * 2) +
2024 sizeof(struct sadb_x_policy) +
2025 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
2027 pfkey_xfrm_policy2sec_ctx_size(xp);
2030 static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
2032 struct sk_buff *skb;
2035 size = pfkey_xfrm_policy2msg_size(xp);
2037 skb = alloc_skb(size + 16, GFP_ATOMIC);
2039 return ERR_PTR(-ENOBUFS);
2044 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
2046 struct sadb_msg *hdr;
2047 struct sadb_address *addr;
2048 struct sadb_lifetime *lifetime;
2049 struct sadb_x_policy *pol;
2050 struct sadb_x_sec_ctx *sec_ctx;
2051 struct xfrm_sec_ctx *xfrm_ctx;
2054 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2055 int socklen = pfkey_sockaddr_len(xp->family);
2057 size = pfkey_xfrm_policy2msg_size(xp);
2059 /* call should fill header later */
2060 hdr = skb_put(skb, sizeof(struct sadb_msg));
2061 memset(hdr, 0, size); /* XXX do we need this ? */
2064 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
2065 addr->sadb_address_len =
2066 (sizeof(struct sadb_address)+sockaddr_size)/
2068 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2069 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2070 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2071 addr->sadb_address_reserved = 0;
2072 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2074 (struct sockaddr *) (addr + 1),
2079 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
2080 addr->sadb_address_len =
2081 (sizeof(struct sadb_address)+sockaddr_size)/
2083 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2084 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2085 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2086 addr->sadb_address_reserved = 0;
2088 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2089 (struct sockaddr *) (addr + 1),
2093 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2094 lifetime->sadb_lifetime_len =
2095 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2096 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2097 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2098 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2099 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2100 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2102 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2103 lifetime->sadb_lifetime_len =
2104 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2105 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2106 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2107 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2108 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2109 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2111 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2112 lifetime->sadb_lifetime_len =
2113 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2114 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2115 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2116 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2117 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2118 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2120 pol = skb_put(skb, sizeof(struct sadb_x_policy));
2121 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2122 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2123 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2124 if (xp->action == XFRM_POLICY_ALLOW) {
2126 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2128 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2130 pol->sadb_x_policy_dir = dir+1;
2131 pol->sadb_x_policy_reserved = 0;
2132 pol->sadb_x_policy_id = xp->index;
2133 pol->sadb_x_policy_priority = xp->priority;
2135 for (i=0; i<xp->xfrm_nr; i++) {
2136 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
2137 struct sadb_x_ipsecrequest *rq;
2141 req_size = sizeof(struct sadb_x_ipsecrequest);
2142 if (t->mode == XFRM_MODE_TUNNEL) {
2143 socklen = pfkey_sockaddr_len(t->encap_family);
2144 req_size += socklen * 2;
2148 rq = skb_put(skb, req_size);
2149 pol->sadb_x_policy_len += req_size/8;
2150 memset(rq, 0, sizeof(*rq));
2151 rq->sadb_x_ipsecrequest_len = req_size;
2152 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2153 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2155 rq->sadb_x_ipsecrequest_mode = mode;
2156 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2158 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2160 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2161 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2163 if (t->mode == XFRM_MODE_TUNNEL) {
2164 u8 *sa = (void *)(rq + 1);
2165 pfkey_sockaddr_fill(&t->saddr, 0,
2166 (struct sockaddr *)sa,
2168 pfkey_sockaddr_fill(&t->id.daddr, 0,
2169 (struct sockaddr *) (sa + socklen),
2174 /* security context */
2175 if ((xfrm_ctx = xp->security)) {
2176 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2178 sec_ctx = skb_put(skb, ctx_size);
2179 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2180 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2181 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2182 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2183 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2184 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2188 hdr->sadb_msg_len = size / sizeof(uint64_t);
2189 hdr->sadb_msg_reserved = refcount_read(&xp->refcnt);
2194 static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2196 struct sk_buff *out_skb;
2197 struct sadb_msg *out_hdr;
2200 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2201 if (IS_ERR(out_skb))
2202 return PTR_ERR(out_skb);
2204 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2210 out_hdr = (struct sadb_msg *) out_skb->data;
2211 out_hdr->sadb_msg_version = PF_KEY_V2;
2213 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2214 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2216 out_hdr->sadb_msg_type = event2poltype(c->event);
2217 out_hdr->sadb_msg_errno = 0;
2218 out_hdr->sadb_msg_seq = c->seq;
2219 out_hdr->sadb_msg_pid = c->portid;
2220 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
2225 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2227 struct net *net = sock_net(sk);
2229 struct sadb_lifetime *lifetime;
2230 struct sadb_address *sa;
2231 struct sadb_x_policy *pol;
2232 struct xfrm_policy *xp;
2234 struct sadb_x_sec_ctx *sec_ctx;
2236 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2237 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2238 !ext_hdrs[SADB_X_EXT_POLICY-1])
2241 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2242 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2244 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2247 xp = xfrm_policy_alloc(net, GFP_KERNEL);
2251 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2252 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2253 xp->priority = pol->sadb_x_policy_priority;
2255 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2256 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2257 xp->selector.family = xp->family;
2258 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2259 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2260 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2261 if (xp->selector.sport)
2262 xp->selector.sport_mask = htons(0xffff);
2264 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2265 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2266 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2268 /* Amusing, we set this twice. KAME apps appear to set same value
2269 * in both addresses.
2271 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2273 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2274 if (xp->selector.dport)
2275 xp->selector.dport_mask = htons(0xffff);
2277 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2278 if (sec_ctx != NULL) {
2279 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2286 err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL);
2293 xp->lft.soft_byte_limit = XFRM_INF;
2294 xp->lft.hard_byte_limit = XFRM_INF;
2295 xp->lft.soft_packet_limit = XFRM_INF;
2296 xp->lft.hard_packet_limit = XFRM_INF;
2297 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2298 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2299 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2300 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2301 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2303 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2304 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2305 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2306 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2307 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2310 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2311 (err = parse_ipsecrequests(xp, pol)) < 0)
2314 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2315 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2317 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
2322 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2323 c.event = XFRM_MSG_UPDPOLICY;
2325 c.event = XFRM_MSG_NEWPOLICY;
2327 c.seq = hdr->sadb_msg_seq;
2328 c.portid = hdr->sadb_msg_pid;
2330 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2336 xfrm_policy_destroy(xp);
2340 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2342 struct net *net = sock_net(sk);
2344 struct sadb_address *sa;
2345 struct sadb_x_policy *pol;
2346 struct xfrm_policy *xp;
2347 struct xfrm_selector sel;
2349 struct sadb_x_sec_ctx *sec_ctx;
2350 struct xfrm_sec_ctx *pol_ctx = NULL;
2352 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2353 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2354 !ext_hdrs[SADB_X_EXT_POLICY-1])
2357 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2358 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2361 memset(&sel, 0, sizeof(sel));
2363 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2364 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2365 sel.prefixlen_s = sa->sadb_address_prefixlen;
2366 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2367 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2369 sel.sport_mask = htons(0xffff);
2371 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2372 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2373 sel.prefixlen_d = sa->sadb_address_prefixlen;
2374 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2375 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2377 sel.dport_mask = htons(0xffff);
2379 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2380 if (sec_ctx != NULL) {
2381 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2386 err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL);
2392 xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2393 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2395 security_xfrm_policy_free(pol_ctx);
2399 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2404 c.seq = hdr->sadb_msg_seq;
2405 c.portid = hdr->sadb_msg_pid;
2407 c.event = XFRM_MSG_DELPOLICY;
2408 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2415 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
2418 struct sk_buff *out_skb;
2419 struct sadb_msg *out_hdr;
2422 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2423 if (IS_ERR(out_skb)) {
2424 err = PTR_ERR(out_skb);
2427 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2431 out_hdr = (struct sadb_msg *) out_skb->data;
2432 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2433 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2434 out_hdr->sadb_msg_satype = 0;
2435 out_hdr->sadb_msg_errno = 0;
2436 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2437 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2438 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
2445 static int pfkey_sockaddr_pair_size(sa_family_t family)
2447 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2450 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2451 xfrm_address_t *saddr, xfrm_address_t *daddr,
2456 if (ext_len < 2 || ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2459 af = pfkey_sockaddr_extract(sa, saddr);
2463 socklen = pfkey_sockaddr_len(af);
2464 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2472 #ifdef CONFIG_NET_KEY_MIGRATE
2473 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2474 struct xfrm_migrate *m)
2477 struct sadb_x_ipsecrequest *rq2;
2480 if (len < sizeof(*rq1) ||
2481 len < rq1->sadb_x_ipsecrequest_len ||
2482 rq1->sadb_x_ipsecrequest_len < sizeof(*rq1))
2486 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2487 rq1->sadb_x_ipsecrequest_len - sizeof(*rq1),
2488 &m->old_saddr, &m->old_daddr,
2493 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2494 len -= rq1->sadb_x_ipsecrequest_len;
2496 if (len <= sizeof(*rq2) ||
2497 len < rq2->sadb_x_ipsecrequest_len ||
2498 rq2->sadb_x_ipsecrequest_len < sizeof(*rq2))
2502 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2503 rq2->sadb_x_ipsecrequest_len - sizeof(*rq2),
2504 &m->new_saddr, &m->new_daddr,
2509 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2510 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2511 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2514 m->proto = rq1->sadb_x_ipsecrequest_proto;
2515 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2518 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2520 return ((int)(rq1->sadb_x_ipsecrequest_len +
2521 rq2->sadb_x_ipsecrequest_len));
2524 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2525 const struct sadb_msg *hdr, void * const *ext_hdrs)
2527 int i, len, ret, err = -EINVAL;
2529 struct sadb_address *sa;
2530 struct sadb_x_kmaddress *kma;
2531 struct sadb_x_policy *pol;
2532 struct sadb_x_ipsecrequest *rq;
2533 struct xfrm_selector sel;
2534 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2535 struct xfrm_kmaddress k;
2536 struct net *net = sock_net(sk);
2538 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2539 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2540 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2545 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2546 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2548 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2554 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2555 k.reserved = kma->sadb_x_kmaddress_reserved;
2556 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2557 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2558 &k.local, &k.remote, &k.family);
2565 dir = pol->sadb_x_policy_dir - 1;
2566 memset(&sel, 0, sizeof(sel));
2568 /* set source address info of selector */
2569 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2570 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2571 sel.prefixlen_s = sa->sadb_address_prefixlen;
2572 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2573 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2575 sel.sport_mask = htons(0xffff);
2577 /* set destination address info of selector */
2578 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
2579 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2580 sel.prefixlen_d = sa->sadb_address_prefixlen;
2581 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2582 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2584 sel.dport_mask = htons(0xffff);
2586 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2588 /* extract ipsecrequests */
2590 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2592 while (len > 0 && i < XFRM_MAX_DEPTH) {
2593 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2598 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2604 if (!i || len > 0) {
2609 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2610 kma ? &k : NULL, net, NULL);
2616 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2617 const struct sadb_msg *hdr, void * const *ext_hdrs)
2619 return -ENOPROTOOPT;
2624 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2626 struct net *net = sock_net(sk);
2628 int err = 0, delete;
2629 struct sadb_x_policy *pol;
2630 struct xfrm_policy *xp;
2633 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2636 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2637 if (dir >= XFRM_POLICY_MAX)
2640 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2641 xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2642 dir, pol->sadb_x_policy_id, delete, &err);
2647 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2651 c.seq = hdr->sadb_msg_seq;
2652 c.portid = hdr->sadb_msg_pid;
2654 c.event = XFRM_MSG_DELPOLICY;
2655 km_policy_notify(xp, dir, &c);
2657 err = key_pol_get_resp(sk, xp, hdr, dir);
2665 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2667 struct pfkey_sock *pfk = ptr;
2668 struct sk_buff *out_skb;
2669 struct sadb_msg *out_hdr;
2672 if (!pfkey_can_dump(&pfk->sk))
2675 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2676 if (IS_ERR(out_skb))
2677 return PTR_ERR(out_skb);
2679 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2683 out_hdr = (struct sadb_msg *) out_skb->data;
2684 out_hdr->sadb_msg_version = pfk->dump.msg_version;
2685 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2686 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2687 out_hdr->sadb_msg_errno = 0;
2688 out_hdr->sadb_msg_seq = count + 1;
2689 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
2692 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
2693 &pfk->sk, sock_net(&pfk->sk));
2694 pfk->dump.skb = out_skb;
2699 static int pfkey_dump_sp(struct pfkey_sock *pfk)
2701 struct net *net = sock_net(&pfk->sk);
2702 return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2705 static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2707 struct net *net = sock_net((struct sock *)pfk);
2709 xfrm_policy_walk_done(&pfk->dump.u.policy, net);
2712 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2714 struct pfkey_sock *pfk = pfkey_sk(sk);
2716 mutex_lock(&pfk->dump_lock);
2717 if (pfk->dump.dump != NULL) {
2718 mutex_unlock(&pfk->dump_lock);
2722 pfk->dump.msg_version = hdr->sadb_msg_version;
2723 pfk->dump.msg_portid = hdr->sadb_msg_pid;
2724 pfk->dump.dump = pfkey_dump_sp;
2725 pfk->dump.done = pfkey_dump_sp_done;
2726 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2727 mutex_unlock(&pfk->dump_lock);
2729 return pfkey_do_dump(pfk);
2732 static int key_notify_policy_flush(const struct km_event *c)
2734 struct sk_buff *skb_out;
2735 struct sadb_msg *hdr;
2737 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2740 hdr = skb_put(skb_out, sizeof(struct sadb_msg));
2741 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2742 hdr->sadb_msg_seq = c->seq;
2743 hdr->sadb_msg_pid = c->portid;
2744 hdr->sadb_msg_version = PF_KEY_V2;
2745 hdr->sadb_msg_errno = (uint8_t) 0;
2746 hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2747 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2748 hdr->sadb_msg_reserved = 0;
2749 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
2754 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2756 struct net *net = sock_net(sk);
2760 err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, true);
2761 err2 = unicast_flush_resp(sk, hdr);
2763 if (err == -ESRCH) /* empty table - old silent behavior */
2768 c.data.type = XFRM_POLICY_TYPE_MAIN;
2769 c.event = XFRM_MSG_FLUSHPOLICY;
2770 c.portid = hdr->sadb_msg_pid;
2771 c.seq = hdr->sadb_msg_seq;
2773 km_policy_notify(NULL, 0, &c);
2778 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2779 const struct sadb_msg *hdr, void * const *ext_hdrs);
2780 static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2781 [SADB_RESERVED] = pfkey_reserved,
2782 [SADB_GETSPI] = pfkey_getspi,
2783 [SADB_UPDATE] = pfkey_add,
2784 [SADB_ADD] = pfkey_add,
2785 [SADB_DELETE] = pfkey_delete,
2786 [SADB_GET] = pfkey_get,
2787 [SADB_ACQUIRE] = pfkey_acquire,
2788 [SADB_REGISTER] = pfkey_register,
2789 [SADB_EXPIRE] = NULL,
2790 [SADB_FLUSH] = pfkey_flush,
2791 [SADB_DUMP] = pfkey_dump,
2792 [SADB_X_PROMISC] = pfkey_promisc,
2793 [SADB_X_PCHANGE] = NULL,
2794 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2795 [SADB_X_SPDADD] = pfkey_spdadd,
2796 [SADB_X_SPDDELETE] = pfkey_spddelete,
2797 [SADB_X_SPDGET] = pfkey_spdget,
2798 [SADB_X_SPDACQUIRE] = NULL,
2799 [SADB_X_SPDDUMP] = pfkey_spddump,
2800 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2801 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2802 [SADB_X_SPDDELETE2] = pfkey_spdget,
2803 [SADB_X_MIGRATE] = pfkey_migrate,
2806 static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
2808 void *ext_hdrs[SADB_EXT_MAX];
2811 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2812 BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
2814 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2815 err = parse_exthdrs(skb, hdr, ext_hdrs);
2818 if (pfkey_funcs[hdr->sadb_msg_type])
2819 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2824 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2826 struct sadb_msg *hdr = NULL;
2828 if (skb->len < sizeof(*hdr)) {
2831 hdr = (struct sadb_msg *) skb->data;
2832 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2833 hdr->sadb_msg_reserved != 0 ||
2834 (hdr->sadb_msg_type <= SADB_RESERVED ||
2835 hdr->sadb_msg_type > SADB_MAX)) {
2838 } else if (hdr->sadb_msg_len != (skb->len /
2839 sizeof(uint64_t)) ||
2840 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2841 sizeof(uint64_t))) {
2851 static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2852 const struct xfrm_algo_desc *d)
2854 unsigned int id = d->desc.sadb_alg_id;
2856 if (id >= sizeof(t->aalgos) * 8)
2859 return (t->aalgos >> id) & 1;
2862 static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2863 const struct xfrm_algo_desc *d)
2865 unsigned int id = d->desc.sadb_alg_id;
2867 if (id >= sizeof(t->ealgos) * 8)
2870 return (t->ealgos >> id) & 1;
2873 static int count_ah_combs(const struct xfrm_tmpl *t)
2877 for (i = 0; ; i++) {
2878 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2881 if (!aalg->pfkey_supported)
2883 if (aalg_tmpl_set(t, aalg) && aalg->available)
2884 sz += sizeof(struct sadb_comb);
2886 return sz + sizeof(struct sadb_prop);
2889 static int count_esp_combs(const struct xfrm_tmpl *t)
2893 for (i = 0; ; i++) {
2894 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2898 if (!ealg->pfkey_supported)
2901 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2904 for (k = 1; ; k++) {
2905 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2909 if (!aalg->pfkey_supported)
2912 if (aalg_tmpl_set(t, aalg) && aalg->available)
2913 sz += sizeof(struct sadb_comb);
2916 return sz + sizeof(struct sadb_prop);
2919 static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2921 struct sadb_prop *p;
2924 p = skb_put(skb, sizeof(struct sadb_prop));
2925 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2926 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2927 p->sadb_prop_replay = 32;
2928 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2930 for (i = 0; ; i++) {
2931 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2935 if (!aalg->pfkey_supported)
2938 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2939 struct sadb_comb *c;
2940 c = skb_put_zero(skb, sizeof(struct sadb_comb));
2941 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2942 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2943 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2944 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2945 c->sadb_comb_hard_addtime = 24*60*60;
2946 c->sadb_comb_soft_addtime = 20*60*60;
2947 c->sadb_comb_hard_usetime = 8*60*60;
2948 c->sadb_comb_soft_usetime = 7*60*60;
2953 static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2955 struct sadb_prop *p;
2958 p = skb_put(skb, sizeof(struct sadb_prop));
2959 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2960 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2961 p->sadb_prop_replay = 32;
2962 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2965 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2969 if (!ealg->pfkey_supported)
2972 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2975 for (k = 1; ; k++) {
2976 struct sadb_comb *c;
2977 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2980 if (!aalg->pfkey_supported)
2982 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2984 c = skb_put(skb, sizeof(struct sadb_comb));
2985 memset(c, 0, sizeof(*c));
2986 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2987 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2988 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2989 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2990 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2991 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2992 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2993 c->sadb_comb_hard_addtime = 24*60*60;
2994 c->sadb_comb_soft_addtime = 20*60*60;
2995 c->sadb_comb_hard_usetime = 8*60*60;
2996 c->sadb_comb_soft_usetime = 7*60*60;
3001 static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
3006 static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
3008 struct sk_buff *out_skb;
3009 struct sadb_msg *out_hdr;
3013 hard = c->data.hard;
3019 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
3020 if (IS_ERR(out_skb))
3021 return PTR_ERR(out_skb);
3023 out_hdr = (struct sadb_msg *) out_skb->data;
3024 out_hdr->sadb_msg_version = PF_KEY_V2;
3025 out_hdr->sadb_msg_type = SADB_EXPIRE;
3026 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3027 out_hdr->sadb_msg_errno = 0;
3028 out_hdr->sadb_msg_reserved = 0;
3029 out_hdr->sadb_msg_seq = 0;
3030 out_hdr->sadb_msg_pid = 0;
3032 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3037 static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
3039 struct net *net = x ? xs_net(x) : c->net;
3040 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3042 if (atomic_read(&net_pfkey->socks_nr) == 0)
3046 case XFRM_MSG_EXPIRE:
3047 return key_notify_sa_expire(x, c);
3048 case XFRM_MSG_DELSA:
3049 case XFRM_MSG_NEWSA:
3050 case XFRM_MSG_UPDSA:
3051 return key_notify_sa(x, c);
3052 case XFRM_MSG_FLUSHSA:
3053 return key_notify_sa_flush(c);
3054 case XFRM_MSG_NEWAE: /* not yet supported */
3057 pr_err("pfkey: Unknown SA event %d\n", c->event);
3064 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3066 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3070 case XFRM_MSG_POLEXPIRE:
3071 return key_notify_policy_expire(xp, c);
3072 case XFRM_MSG_DELPOLICY:
3073 case XFRM_MSG_NEWPOLICY:
3074 case XFRM_MSG_UPDPOLICY:
3075 return key_notify_policy(xp, dir, c);
3076 case XFRM_MSG_FLUSHPOLICY:
3077 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3079 return key_notify_policy_flush(c);
3081 pr_err("pfkey: Unknown policy event %d\n", c->event);
3088 static u32 get_acqseq(void)
3091 static atomic_t acqseq;
3094 res = atomic_inc_return(&acqseq);
3099 static bool pfkey_is_alive(const struct km_event *c)
3101 struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id);
3103 bool is_alive = false;
3106 sk_for_each_rcu(sk, &net_pfkey->table) {
3107 if (pfkey_sk(sk)->registered) {
3117 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
3119 struct sk_buff *skb;
3120 struct sadb_msg *hdr;
3121 struct sadb_address *addr;
3122 struct sadb_x_policy *pol;
3125 struct sadb_x_sec_ctx *sec_ctx;
3126 struct xfrm_sec_ctx *xfrm_ctx;
3129 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3133 size = sizeof(struct sadb_msg) +
3134 (sizeof(struct sadb_address) * 2) +
3135 (sockaddr_size * 2) +
3136 sizeof(struct sadb_x_policy);
3138 if (x->id.proto == IPPROTO_AH)
3139 size += count_ah_combs(t);
3140 else if (x->id.proto == IPPROTO_ESP)
3141 size += count_esp_combs(t);
3143 if ((xfrm_ctx = x->security)) {
3144 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3145 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3148 skb = alloc_skb(size + 16, GFP_ATOMIC);
3152 hdr = skb_put(skb, sizeof(struct sadb_msg));
3153 hdr->sadb_msg_version = PF_KEY_V2;
3154 hdr->sadb_msg_type = SADB_ACQUIRE;
3155 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3156 hdr->sadb_msg_len = size / sizeof(uint64_t);
3157 hdr->sadb_msg_errno = 0;
3158 hdr->sadb_msg_reserved = 0;
3159 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3160 hdr->sadb_msg_pid = 0;
3163 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3164 addr->sadb_address_len =
3165 (sizeof(struct sadb_address)+sockaddr_size)/
3167 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3168 addr->sadb_address_proto = 0;
3169 addr->sadb_address_reserved = 0;
3170 addr->sadb_address_prefixlen =
3171 pfkey_sockaddr_fill(&x->props.saddr, 0,
3172 (struct sockaddr *) (addr + 1),
3174 if (!addr->sadb_address_prefixlen)
3178 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3179 addr->sadb_address_len =
3180 (sizeof(struct sadb_address)+sockaddr_size)/
3182 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3183 addr->sadb_address_proto = 0;
3184 addr->sadb_address_reserved = 0;
3185 addr->sadb_address_prefixlen =
3186 pfkey_sockaddr_fill(&x->id.daddr, 0,
3187 (struct sockaddr *) (addr + 1),
3189 if (!addr->sadb_address_prefixlen)
3192 pol = skb_put(skb, sizeof(struct sadb_x_policy));
3193 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3194 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3195 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3196 pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
3197 pol->sadb_x_policy_reserved = 0;
3198 pol->sadb_x_policy_id = xp->index;
3199 pol->sadb_x_policy_priority = xp->priority;
3201 /* Set sadb_comb's. */
3202 if (x->id.proto == IPPROTO_AH)
3203 dump_ah_combs(skb, t);
3204 else if (x->id.proto == IPPROTO_ESP)
3205 dump_esp_combs(skb, t);
3207 /* security context */
3209 sec_ctx = skb_put(skb,
3210 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3211 sec_ctx->sadb_x_sec_len =
3212 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3213 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3214 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3215 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3216 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3217 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3221 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3225 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3226 u8 *data, int len, int *dir)
3228 struct net *net = sock_net(sk);
3229 struct xfrm_policy *xp;
3230 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3231 struct sadb_x_sec_ctx *sec_ctx;
3233 switch (sk->sk_family) {
3235 if (opt != IP_IPSEC_POLICY) {
3240 #if IS_ENABLED(CONFIG_IPV6)
3242 if (opt != IPV6_IPSEC_POLICY) {
3255 if (len < sizeof(struct sadb_x_policy) ||
3256 pol->sadb_x_policy_len*8 > len ||
3257 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3258 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3261 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3267 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3268 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3270 xp->lft.soft_byte_limit = XFRM_INF;
3271 xp->lft.hard_byte_limit = XFRM_INF;
3272 xp->lft.soft_packet_limit = XFRM_INF;
3273 xp->lft.hard_packet_limit = XFRM_INF;
3274 xp->family = sk->sk_family;
3277 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3278 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3281 /* security context too */
3282 if (len >= (pol->sadb_x_policy_len*8 +
3283 sizeof(struct sadb_x_sec_ctx))) {
3284 char *p = (char *)pol;
3285 struct xfrm_user_sec_ctx *uctx;
3287 p += pol->sadb_x_policy_len*8;
3288 sec_ctx = (struct sadb_x_sec_ctx *)p;
3289 if (len < pol->sadb_x_policy_len*8 +
3290 sec_ctx->sadb_x_sec_len*8) {
3294 if ((*dir = verify_sec_ctx_len(p)))
3296 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC);
3297 *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC);
3304 *dir = pol->sadb_x_policy_dir-1;
3309 xfrm_policy_destroy(xp);
3313 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3315 struct sk_buff *skb;
3316 struct sadb_msg *hdr;
3318 struct sadb_address *addr;
3319 struct sadb_x_nat_t_port *n_port;
3322 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3323 struct xfrm_encap_tmpl *natt = NULL;
3325 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3337 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3339 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3340 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3343 size = sizeof(struct sadb_msg) +
3344 sizeof(struct sadb_sa) +
3345 (sizeof(struct sadb_address) * 2) +
3346 (sockaddr_size * 2) +
3347 (sizeof(struct sadb_x_nat_t_port) * 2);
3349 skb = alloc_skb(size + 16, GFP_ATOMIC);
3353 hdr = skb_put(skb, sizeof(struct sadb_msg));
3354 hdr->sadb_msg_version = PF_KEY_V2;
3355 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3356 hdr->sadb_msg_satype = satype;
3357 hdr->sadb_msg_len = size / sizeof(uint64_t);
3358 hdr->sadb_msg_errno = 0;
3359 hdr->sadb_msg_reserved = 0;
3360 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3361 hdr->sadb_msg_pid = 0;
3364 sa = skb_put(skb, sizeof(struct sadb_sa));
3365 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3366 sa->sadb_sa_exttype = SADB_EXT_SA;
3367 sa->sadb_sa_spi = x->id.spi;
3368 sa->sadb_sa_replay = 0;
3369 sa->sadb_sa_state = 0;
3370 sa->sadb_sa_auth = 0;
3371 sa->sadb_sa_encrypt = 0;
3372 sa->sadb_sa_flags = 0;
3374 /* ADDRESS_SRC (old addr) */
3375 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3376 addr->sadb_address_len =
3377 (sizeof(struct sadb_address)+sockaddr_size)/
3379 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3380 addr->sadb_address_proto = 0;
3381 addr->sadb_address_reserved = 0;
3382 addr->sadb_address_prefixlen =
3383 pfkey_sockaddr_fill(&x->props.saddr, 0,
3384 (struct sockaddr *) (addr + 1),
3386 if (!addr->sadb_address_prefixlen)
3389 /* NAT_T_SPORT (old port) */
3390 n_port = skb_put(skb, sizeof(*n_port));
3391 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3392 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3393 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3394 n_port->sadb_x_nat_t_port_reserved = 0;
3396 /* ADDRESS_DST (new addr) */
3397 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3398 addr->sadb_address_len =
3399 (sizeof(struct sadb_address)+sockaddr_size)/
3401 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3402 addr->sadb_address_proto = 0;
3403 addr->sadb_address_reserved = 0;
3404 addr->sadb_address_prefixlen =
3405 pfkey_sockaddr_fill(ipaddr, 0,
3406 (struct sockaddr *) (addr + 1),
3408 if (!addr->sadb_address_prefixlen)
3411 /* NAT_T_DPORT (new port) */
3412 n_port = skb_put(skb, sizeof(*n_port));
3413 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3414 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3415 n_port->sadb_x_nat_t_port_port = sport;
3416 n_port->sadb_x_nat_t_port_reserved = 0;
3418 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3422 #ifdef CONFIG_NET_KEY_MIGRATE
3423 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3424 const struct xfrm_selector *sel)
3426 struct sadb_address *addr;
3427 addr = skb_put(skb, sizeof(struct sadb_address) + sasize);
3428 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3429 addr->sadb_address_exttype = type;
3430 addr->sadb_address_proto = sel->proto;
3431 addr->sadb_address_reserved = 0;
3434 case SADB_EXT_ADDRESS_SRC:
3435 addr->sadb_address_prefixlen = sel->prefixlen_s;
3436 pfkey_sockaddr_fill(&sel->saddr, 0,
3437 (struct sockaddr *)(addr + 1),
3440 case SADB_EXT_ADDRESS_DST:
3441 addr->sadb_address_prefixlen = sel->prefixlen_d;
3442 pfkey_sockaddr_fill(&sel->daddr, 0,
3443 (struct sockaddr *)(addr + 1),
3454 static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
3456 struct sadb_x_kmaddress *kma;
3458 int family = k->family;
3459 int socklen = pfkey_sockaddr_len(family);
3462 size_req = (sizeof(struct sadb_x_kmaddress) +
3463 pfkey_sockaddr_pair_size(family));
3465 kma = skb_put_zero(skb, size_req);
3466 kma->sadb_x_kmaddress_len = size_req / 8;
3467 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3468 kma->sadb_x_kmaddress_reserved = k->reserved;
3470 sa = (u8 *)(kma + 1);
3471 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3472 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3478 static int set_ipsecrequest(struct sk_buff *skb,
3479 uint8_t proto, uint8_t mode, int level,
3480 uint32_t reqid, uint8_t family,
3481 const xfrm_address_t *src, const xfrm_address_t *dst)
3483 struct sadb_x_ipsecrequest *rq;
3485 int socklen = pfkey_sockaddr_len(family);
3488 size_req = sizeof(struct sadb_x_ipsecrequest) +
3489 pfkey_sockaddr_pair_size(family);
3491 rq = skb_put_zero(skb, size_req);
3492 rq->sadb_x_ipsecrequest_len = size_req;
3493 rq->sadb_x_ipsecrequest_proto = proto;
3494 rq->sadb_x_ipsecrequest_mode = mode;
3495 rq->sadb_x_ipsecrequest_level = level;
3496 rq->sadb_x_ipsecrequest_reqid = reqid;
3498 sa = (u8 *) (rq + 1);
3499 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3500 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3507 #ifdef CONFIG_NET_KEY_MIGRATE
3508 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3509 const struct xfrm_migrate *m, int num_bundles,
3510 const struct xfrm_kmaddress *k,
3511 const struct xfrm_encap_tmpl *encap)
3517 struct sk_buff *skb;
3518 struct sadb_msg *hdr;
3519 struct sadb_x_policy *pol;
3520 const struct xfrm_migrate *mp;
3522 if (type != XFRM_POLICY_TYPE_MAIN)
3525 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3529 /* addresses for KM */
3530 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3531 pfkey_sockaddr_pair_size(k->family));
3535 sasize_sel = pfkey_sockaddr_size(sel->family);
3538 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3541 size_pol += sizeof(struct sadb_x_policy);
3544 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3545 /* old locator pair */
3546 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3547 pfkey_sockaddr_pair_size(mp->old_family);
3548 /* new locator pair */
3549 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3550 pfkey_sockaddr_pair_size(mp->new_family);
3553 size += sizeof(struct sadb_msg) + size_pol;
3556 skb = alloc_skb(size, GFP_ATOMIC);
3560 hdr = skb_put(skb, sizeof(struct sadb_msg));
3561 hdr->sadb_msg_version = PF_KEY_V2;
3562 hdr->sadb_msg_type = SADB_X_MIGRATE;
3563 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3564 hdr->sadb_msg_len = size / 8;
3565 hdr->sadb_msg_errno = 0;
3566 hdr->sadb_msg_reserved = 0;
3567 hdr->sadb_msg_seq = 0;
3568 hdr->sadb_msg_pid = 0;
3570 /* Addresses to be used by KM for negotiation, if ext is available */
3571 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3575 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3578 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3580 /* policy information */
3581 pol = skb_put(skb, sizeof(struct sadb_x_policy));
3582 pol->sadb_x_policy_len = size_pol / 8;
3583 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3584 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3585 pol->sadb_x_policy_dir = dir + 1;
3586 pol->sadb_x_policy_reserved = 0;
3587 pol->sadb_x_policy_id = 0;
3588 pol->sadb_x_policy_priority = 0;
3590 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3591 /* old ipsecrequest */
3592 int mode = pfkey_mode_from_xfrm(mp->mode);
3595 if (set_ipsecrequest(skb, mp->proto, mode,
3596 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3597 mp->reqid, mp->old_family,
3598 &mp->old_saddr, &mp->old_daddr) < 0)
3601 /* new ipsecrequest */
3602 if (set_ipsecrequest(skb, mp->proto, mode,
3603 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3604 mp->reqid, mp->new_family,
3605 &mp->new_saddr, &mp->new_daddr) < 0)
3609 /* broadcast migrate message to sockets */
3610 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
3619 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3620 const struct xfrm_migrate *m, int num_bundles,
3621 const struct xfrm_kmaddress *k,
3622 const struct xfrm_encap_tmpl *encap)
3624 return -ENOPROTOOPT;
3628 static int pfkey_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
3630 struct sock *sk = sock->sk;
3631 struct sk_buff *skb = NULL;
3632 struct sadb_msg *hdr = NULL;
3634 struct net *net = sock_net(sk);
3637 if (msg->msg_flags & MSG_OOB)
3641 if ((unsigned int)len > sk->sk_sndbuf - 32)
3645 skb = alloc_skb(len, GFP_KERNEL);
3650 if (memcpy_from_msg(skb_put(skb,len), msg, len))
3653 hdr = pfkey_get_base_msg(skb, &err);
3657 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
3658 err = pfkey_process(sk, skb, hdr);
3659 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
3662 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3669 static int pfkey_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
3672 struct sock *sk = sock->sk;
3673 struct pfkey_sock *pfk = pfkey_sk(sk);
3674 struct sk_buff *skb;
3678 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3681 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3687 msg->msg_flags |= MSG_TRUNC;
3691 skb_reset_transport_header(skb);
3692 err = skb_copy_datagram_msg(skb, 0, msg, copied);
3696 sock_recv_ts_and_drops(msg, sk, skb);
3698 err = (flags & MSG_TRUNC) ? skb->len : copied;
3700 if (pfk->dump.dump != NULL &&
3701 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3705 skb_free_datagram(sk, skb);
3710 static const struct proto_ops pfkey_ops = {
3712 .owner = THIS_MODULE,
3713 /* Operations that make no sense on pfkey sockets. */
3714 .bind = sock_no_bind,
3715 .connect = sock_no_connect,
3716 .socketpair = sock_no_socketpair,
3717 .accept = sock_no_accept,
3718 .getname = sock_no_getname,
3719 .ioctl = sock_no_ioctl,
3720 .listen = sock_no_listen,
3721 .shutdown = sock_no_shutdown,
3722 .setsockopt = sock_no_setsockopt,
3723 .getsockopt = sock_no_getsockopt,
3724 .mmap = sock_no_mmap,
3725 .sendpage = sock_no_sendpage,
3727 /* Now the operations that really occur. */
3728 .release = pfkey_release,
3729 .poll = datagram_poll,
3730 .sendmsg = pfkey_sendmsg,
3731 .recvmsg = pfkey_recvmsg,
3734 static const struct net_proto_family pfkey_family_ops = {
3736 .create = pfkey_create,
3737 .owner = THIS_MODULE,
3740 #ifdef CONFIG_PROC_FS
3741 static int pfkey_seq_show(struct seq_file *f, void *v)
3743 struct sock *s = sk_entry(v);
3745 if (v == SEQ_START_TOKEN)
3746 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3748 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
3750 refcount_read(&s->sk_refcnt),
3751 sk_rmem_alloc_get(s),
3752 sk_wmem_alloc_get(s),
3753 from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
3759 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3762 struct net *net = seq_file_net(f);
3763 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3766 return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
3769 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3771 struct net *net = seq_file_net(f);
3772 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3774 return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
3777 static void pfkey_seq_stop(struct seq_file *f, void *v)
3783 static const struct seq_operations pfkey_seq_ops = {
3784 .start = pfkey_seq_start,
3785 .next = pfkey_seq_next,
3786 .stop = pfkey_seq_stop,
3787 .show = pfkey_seq_show,
3790 static int pfkey_seq_open(struct inode *inode, struct file *file)
3792 return seq_open_net(inode, file, &pfkey_seq_ops,
3793 sizeof(struct seq_net_private));
3796 static const struct file_operations pfkey_proc_ops = {
3797 .open = pfkey_seq_open,
3799 .llseek = seq_lseek,
3800 .release = seq_release_net,
3803 static int __net_init pfkey_init_proc(struct net *net)
3805 struct proc_dir_entry *e;
3807 e = proc_create("pfkey", 0, net->proc_net, &pfkey_proc_ops);
3814 static void __net_exit pfkey_exit_proc(struct net *net)
3816 remove_proc_entry("pfkey", net->proc_net);
3819 static inline int pfkey_init_proc(struct net *net)
3824 static inline void pfkey_exit_proc(struct net *net)
3829 static struct xfrm_mgr pfkeyv2_mgr =
3831 .notify = pfkey_send_notify,
3832 .acquire = pfkey_send_acquire,
3833 .compile_policy = pfkey_compile_policy,
3834 .new_mapping = pfkey_send_new_mapping,
3835 .notify_policy = pfkey_send_policy_notify,
3836 .migrate = pfkey_send_migrate,
3837 .is_alive = pfkey_is_alive,
3840 static int __net_init pfkey_net_init(struct net *net)
3842 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3845 INIT_HLIST_HEAD(&net_pfkey->table);
3846 atomic_set(&net_pfkey->socks_nr, 0);
3848 rv = pfkey_init_proc(net);
3853 static void __net_exit pfkey_net_exit(struct net *net)
3855 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3857 pfkey_exit_proc(net);
3858 WARN_ON(!hlist_empty(&net_pfkey->table));
3861 static struct pernet_operations pfkey_net_ops = {
3862 .init = pfkey_net_init,
3863 .exit = pfkey_net_exit,
3864 .id = &pfkey_net_id,
3865 .size = sizeof(struct netns_pfkey),
3868 static void __exit ipsec_pfkey_exit(void)
3870 xfrm_unregister_km(&pfkeyv2_mgr);
3871 sock_unregister(PF_KEY);
3872 unregister_pernet_subsys(&pfkey_net_ops);
3873 proto_unregister(&key_proto);
3876 static int __init ipsec_pfkey_init(void)
3878 int err = proto_register(&key_proto, 0);
3883 err = register_pernet_subsys(&pfkey_net_ops);
3885 goto out_unregister_key_proto;
3886 err = sock_register(&pfkey_family_ops);
3888 goto out_unregister_pernet;
3889 err = xfrm_register_km(&pfkeyv2_mgr);
3891 goto out_sock_unregister;
3895 out_sock_unregister:
3896 sock_unregister(PF_KEY);
3897 out_unregister_pernet:
3898 unregister_pernet_subsys(&pfkey_net_ops);
3899 out_unregister_key_proto:
3900 proto_unregister(&key_proto);
3904 module_init(ipsec_pfkey_init);
3905 module_exit(ipsec_pfkey_exit);
3906 MODULE_LICENSE("GPL");
3907 MODULE_ALIAS_NETPROTO(PF_KEY);