[PFKEY]: Sending an SADB_GET responds with an SADB_GET
[linux-2.6.git] / net / key / af_key.c
1 /*
2  * net/key/af_key.c     An implementation of PF_KEYv2 sockets.
3  *
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.
8  *
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>
15  */
16
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>
25 #include <linux/in.h>
26 #include <linux/in6.h>
27 #include <linux/proc_fs.h>
28 #include <linux/init.h>
29 #include <net/net_namespace.h>
30 #include <net/xfrm.h>
31
32 #include <net/sock.h>
33
34 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
35 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
36
37
38 /* List of all pfkey sockets. */
39 static HLIST_HEAD(pfkey_table);
40 static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
41 static DEFINE_RWLOCK(pfkey_table_lock);
42 static atomic_t pfkey_table_users = ATOMIC_INIT(0);
43
44 static atomic_t pfkey_socks_nr = ATOMIC_INIT(0);
45
46 struct pfkey_sock {
47         /* struct sock must be the first member of struct pfkey_sock */
48         struct sock     sk;
49         int             registered;
50         int             promisc;
51 };
52
53 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
54 {
55         return (struct pfkey_sock *)sk;
56 }
57
58 static void pfkey_sock_destruct(struct sock *sk)
59 {
60         skb_queue_purge(&sk->sk_receive_queue);
61
62         if (!sock_flag(sk, SOCK_DEAD)) {
63                 printk("Attempt to release alive pfkey socket: %p\n", sk);
64                 return;
65         }
66
67         BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
68         BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
69
70         atomic_dec(&pfkey_socks_nr);
71 }
72
73 static void pfkey_table_grab(void)
74 {
75         write_lock_bh(&pfkey_table_lock);
76
77         if (atomic_read(&pfkey_table_users)) {
78                 DECLARE_WAITQUEUE(wait, current);
79
80                 add_wait_queue_exclusive(&pfkey_table_wait, &wait);
81                 for(;;) {
82                         set_current_state(TASK_UNINTERRUPTIBLE);
83                         if (atomic_read(&pfkey_table_users) == 0)
84                                 break;
85                         write_unlock_bh(&pfkey_table_lock);
86                         schedule();
87                         write_lock_bh(&pfkey_table_lock);
88                 }
89
90                 __set_current_state(TASK_RUNNING);
91                 remove_wait_queue(&pfkey_table_wait, &wait);
92         }
93 }
94
95 static __inline__ void pfkey_table_ungrab(void)
96 {
97         write_unlock_bh(&pfkey_table_lock);
98         wake_up(&pfkey_table_wait);
99 }
100
101 static __inline__ void pfkey_lock_table(void)
102 {
103         /* read_lock() synchronizes us to pfkey_table_grab */
104
105         read_lock(&pfkey_table_lock);
106         atomic_inc(&pfkey_table_users);
107         read_unlock(&pfkey_table_lock);
108 }
109
110 static __inline__ void pfkey_unlock_table(void)
111 {
112         if (atomic_dec_and_test(&pfkey_table_users))
113                 wake_up(&pfkey_table_wait);
114 }
115
116
117 static const struct proto_ops pfkey_ops;
118
119 static void pfkey_insert(struct sock *sk)
120 {
121         pfkey_table_grab();
122         sk_add_node(sk, &pfkey_table);
123         pfkey_table_ungrab();
124 }
125
126 static void pfkey_remove(struct sock *sk)
127 {
128         pfkey_table_grab();
129         sk_del_node_init(sk);
130         pfkey_table_ungrab();
131 }
132
133 static struct proto key_proto = {
134         .name     = "KEY",
135         .owner    = THIS_MODULE,
136         .obj_size = sizeof(struct pfkey_sock),
137 };
138
139 static int pfkey_create(struct net *net, struct socket *sock, int protocol)
140 {
141         struct sock *sk;
142         int err;
143
144         if (net != &init_net)
145                 return -EAFNOSUPPORT;
146
147         if (!capable(CAP_NET_ADMIN))
148                 return -EPERM;
149         if (sock->type != SOCK_RAW)
150                 return -ESOCKTNOSUPPORT;
151         if (protocol != PF_KEY_V2)
152                 return -EPROTONOSUPPORT;
153
154         err = -ENOMEM;
155         sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
156         if (sk == NULL)
157                 goto out;
158
159         sock->ops = &pfkey_ops;
160         sock_init_data(sock, sk);
161
162         sk->sk_family = PF_KEY;
163         sk->sk_destruct = pfkey_sock_destruct;
164
165         atomic_inc(&pfkey_socks_nr);
166
167         pfkey_insert(sk);
168
169         return 0;
170 out:
171         return err;
172 }
173
174 static int pfkey_release(struct socket *sock)
175 {
176         struct sock *sk = sock->sk;
177
178         if (!sk)
179                 return 0;
180
181         pfkey_remove(sk);
182
183         sock_orphan(sk);
184         sock->sk = NULL;
185         skb_queue_purge(&sk->sk_write_queue);
186         sock_put(sk);
187
188         return 0;
189 }
190
191 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
192                                gfp_t allocation, struct sock *sk)
193 {
194         int err = -ENOBUFS;
195
196         sock_hold(sk);
197         if (*skb2 == NULL) {
198                 if (atomic_read(&skb->users) != 1) {
199                         *skb2 = skb_clone(skb, allocation);
200                 } else {
201                         *skb2 = skb;
202                         atomic_inc(&skb->users);
203                 }
204         }
205         if (*skb2 != NULL) {
206                 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
207                         skb_orphan(*skb2);
208                         skb_set_owner_r(*skb2, sk);
209                         skb_queue_tail(&sk->sk_receive_queue, *skb2);
210                         sk->sk_data_ready(sk, (*skb2)->len);
211                         *skb2 = NULL;
212                         err = 0;
213                 }
214         }
215         sock_put(sk);
216         return err;
217 }
218
219 /* Send SKB to all pfkey sockets matching selected criteria.  */
220 #define BROADCAST_ALL           0
221 #define BROADCAST_ONE           1
222 #define BROADCAST_REGISTERED    2
223 #define BROADCAST_PROMISC_ONLY  4
224 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
225                            int broadcast_flags, struct sock *one_sk)
226 {
227         struct sock *sk;
228         struct hlist_node *node;
229         struct sk_buff *skb2 = NULL;
230         int err = -ESRCH;
231
232         /* XXX Do we need something like netlink_overrun?  I think
233          * XXX PF_KEY socket apps will not mind current behavior.
234          */
235         if (!skb)
236                 return -ENOMEM;
237
238         pfkey_lock_table();
239         sk_for_each(sk, node, &pfkey_table) {
240                 struct pfkey_sock *pfk = pfkey_sk(sk);
241                 int err2;
242
243                 /* Yes, it means that if you are meant to receive this
244                  * pfkey message you receive it twice as promiscuous
245                  * socket.
246                  */
247                 if (pfk->promisc)
248                         pfkey_broadcast_one(skb, &skb2, allocation, sk);
249
250                 /* the exact target will be processed later */
251                 if (sk == one_sk)
252                         continue;
253                 if (broadcast_flags != BROADCAST_ALL) {
254                         if (broadcast_flags & BROADCAST_PROMISC_ONLY)
255                                 continue;
256                         if ((broadcast_flags & BROADCAST_REGISTERED) &&
257                             !pfk->registered)
258                                 continue;
259                         if (broadcast_flags & BROADCAST_ONE)
260                                 continue;
261                 }
262
263                 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
264
265                 /* Error is cleare after succecful sending to at least one
266                  * registered KM */
267                 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
268                         err = err2;
269         }
270         pfkey_unlock_table();
271
272         if (one_sk != NULL)
273                 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
274
275         if (skb2)
276                 kfree_skb(skb2);
277         kfree_skb(skb);
278         return err;
279 }
280
281 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
282 {
283         *new = *orig;
284 }
285
286 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
287 {
288         struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
289         struct sadb_msg *hdr;
290
291         if (!skb)
292                 return -ENOBUFS;
293
294         /* Woe be to the platform trying to support PFKEY yet
295          * having normal errnos outside the 1-255 range, inclusive.
296          */
297         err = -err;
298         if (err == ERESTARTSYS ||
299             err == ERESTARTNOHAND ||
300             err == ERESTARTNOINTR)
301                 err = EINTR;
302         if (err >= 512)
303                 err = EINVAL;
304         BUG_ON(err <= 0 || err >= 256);
305
306         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
307         pfkey_hdr_dup(hdr, orig);
308         hdr->sadb_msg_errno = (uint8_t) err;
309         hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
310                              sizeof(uint64_t));
311
312         pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
313
314         return 0;
315 }
316
317 static u8 sadb_ext_min_len[] = {
318         [SADB_EXT_RESERVED]             = (u8) 0,
319         [SADB_EXT_SA]                   = (u8) sizeof(struct sadb_sa),
320         [SADB_EXT_LIFETIME_CURRENT]     = (u8) sizeof(struct sadb_lifetime),
321         [SADB_EXT_LIFETIME_HARD]        = (u8) sizeof(struct sadb_lifetime),
322         [SADB_EXT_LIFETIME_SOFT]        = (u8) sizeof(struct sadb_lifetime),
323         [SADB_EXT_ADDRESS_SRC]          = (u8) sizeof(struct sadb_address),
324         [SADB_EXT_ADDRESS_DST]          = (u8) sizeof(struct sadb_address),
325         [SADB_EXT_ADDRESS_PROXY]        = (u8) sizeof(struct sadb_address),
326         [SADB_EXT_KEY_AUTH]             = (u8) sizeof(struct sadb_key),
327         [SADB_EXT_KEY_ENCRYPT]          = (u8) sizeof(struct sadb_key),
328         [SADB_EXT_IDENTITY_SRC]         = (u8) sizeof(struct sadb_ident),
329         [SADB_EXT_IDENTITY_DST]         = (u8) sizeof(struct sadb_ident),
330         [SADB_EXT_SENSITIVITY]          = (u8) sizeof(struct sadb_sens),
331         [SADB_EXT_PROPOSAL]             = (u8) sizeof(struct sadb_prop),
332         [SADB_EXT_SUPPORTED_AUTH]       = (u8) sizeof(struct sadb_supported),
333         [SADB_EXT_SUPPORTED_ENCRYPT]    = (u8) sizeof(struct sadb_supported),
334         [SADB_EXT_SPIRANGE]             = (u8) sizeof(struct sadb_spirange),
335         [SADB_X_EXT_KMPRIVATE]          = (u8) sizeof(struct sadb_x_kmprivate),
336         [SADB_X_EXT_POLICY]             = (u8) sizeof(struct sadb_x_policy),
337         [SADB_X_EXT_SA2]                = (u8) sizeof(struct sadb_x_sa2),
338         [SADB_X_EXT_NAT_T_TYPE]         = (u8) sizeof(struct sadb_x_nat_t_type),
339         [SADB_X_EXT_NAT_T_SPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
340         [SADB_X_EXT_NAT_T_DPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
341         [SADB_X_EXT_NAT_T_OA]           = (u8) sizeof(struct sadb_address),
342         [SADB_X_EXT_SEC_CTX]            = (u8) sizeof(struct sadb_x_sec_ctx),
343 };
344
345 /* Verify sadb_address_{len,prefixlen} against sa_family.  */
346 static int verify_address_len(void *p)
347 {
348         struct sadb_address *sp = p;
349         struct sockaddr *addr = (struct sockaddr *)(sp + 1);
350         struct sockaddr_in *sin;
351 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
352         struct sockaddr_in6 *sin6;
353 #endif
354         int len;
355
356         switch (addr->sa_family) {
357         case AF_INET:
358                 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
359                 if (sp->sadb_address_len != len ||
360                     sp->sadb_address_prefixlen > 32)
361                         return -EINVAL;
362                 break;
363 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
364         case AF_INET6:
365                 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
366                 if (sp->sadb_address_len != len ||
367                     sp->sadb_address_prefixlen > 128)
368                         return -EINVAL;
369                 break;
370 #endif
371         default:
372                 /* It is user using kernel to keep track of security
373                  * associations for another protocol, such as
374                  * OSPF/RSVP/RIPV2/MIP.  It is user's job to verify
375                  * lengths.
376                  *
377                  * XXX Actually, association/policy database is not yet
378                  * XXX able to cope with arbitrary sockaddr families.
379                  * XXX When it can, remove this -EINVAL.  -DaveM
380                  */
381                 return -EINVAL;
382                 break;
383         }
384
385         return 0;
386 }
387
388 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
389 {
390         return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
391                             sec_ctx->sadb_x_ctx_len,
392                             sizeof(uint64_t));
393 }
394
395 static inline int verify_sec_ctx_len(void *p)
396 {
397         struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
398         int len = sec_ctx->sadb_x_ctx_len;
399
400         if (len > PAGE_SIZE)
401                 return -EINVAL;
402
403         len = pfkey_sec_ctx_len(sec_ctx);
404
405         if (sec_ctx->sadb_x_sec_len != len)
406                 return -EINVAL;
407
408         return 0;
409 }
410
411 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
412 {
413         struct xfrm_user_sec_ctx *uctx = NULL;
414         int ctx_size = sec_ctx->sadb_x_ctx_len;
415
416         uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
417
418         if (!uctx)
419                 return NULL;
420
421         uctx->len = pfkey_sec_ctx_len(sec_ctx);
422         uctx->exttype = sec_ctx->sadb_x_sec_exttype;
423         uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
424         uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
425         uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
426         memcpy(uctx + 1, sec_ctx + 1,
427                uctx->ctx_len);
428
429         return uctx;
430 }
431
432 static int present_and_same_family(struct sadb_address *src,
433                                    struct sadb_address *dst)
434 {
435         struct sockaddr *s_addr, *d_addr;
436
437         if (!src || !dst)
438                 return 0;
439
440         s_addr = (struct sockaddr *)(src + 1);
441         d_addr = (struct sockaddr *)(dst + 1);
442         if (s_addr->sa_family != d_addr->sa_family)
443                 return 0;
444         if (s_addr->sa_family != AF_INET
445 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
446             && s_addr->sa_family != AF_INET6
447 #endif
448                 )
449                 return 0;
450
451         return 1;
452 }
453
454 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
455 {
456         char *p = (char *) hdr;
457         int len = skb->len;
458
459         len -= sizeof(*hdr);
460         p += sizeof(*hdr);
461         while (len > 0) {
462                 struct sadb_ext *ehdr = (struct sadb_ext *) p;
463                 uint16_t ext_type;
464                 int ext_len;
465
466                 ext_len  = ehdr->sadb_ext_len;
467                 ext_len *= sizeof(uint64_t);
468                 ext_type = ehdr->sadb_ext_type;
469                 if (ext_len < sizeof(uint64_t) ||
470                     ext_len > len ||
471                     ext_type == SADB_EXT_RESERVED)
472                         return -EINVAL;
473
474                 if (ext_type <= SADB_EXT_MAX) {
475                         int min = (int) sadb_ext_min_len[ext_type];
476                         if (ext_len < min)
477                                 return -EINVAL;
478                         if (ext_hdrs[ext_type-1] != NULL)
479                                 return -EINVAL;
480                         if (ext_type == SADB_EXT_ADDRESS_SRC ||
481                             ext_type == SADB_EXT_ADDRESS_DST ||
482                             ext_type == SADB_EXT_ADDRESS_PROXY ||
483                             ext_type == SADB_X_EXT_NAT_T_OA) {
484                                 if (verify_address_len(p))
485                                         return -EINVAL;
486                         }
487                         if (ext_type == SADB_X_EXT_SEC_CTX) {
488                                 if (verify_sec_ctx_len(p))
489                                         return -EINVAL;
490                         }
491                         ext_hdrs[ext_type-1] = p;
492                 }
493                 p   += ext_len;
494                 len -= ext_len;
495         }
496
497         return 0;
498 }
499
500 static uint16_t
501 pfkey_satype2proto(uint8_t satype)
502 {
503         switch (satype) {
504         case SADB_SATYPE_UNSPEC:
505                 return IPSEC_PROTO_ANY;
506         case SADB_SATYPE_AH:
507                 return IPPROTO_AH;
508         case SADB_SATYPE_ESP:
509                 return IPPROTO_ESP;
510         case SADB_X_SATYPE_IPCOMP:
511                 return IPPROTO_COMP;
512                 break;
513         default:
514                 return 0;
515         }
516         /* NOTREACHED */
517 }
518
519 static uint8_t
520 pfkey_proto2satype(uint16_t proto)
521 {
522         switch (proto) {
523         case IPPROTO_AH:
524                 return SADB_SATYPE_AH;
525         case IPPROTO_ESP:
526                 return SADB_SATYPE_ESP;
527         case IPPROTO_COMP:
528                 return SADB_X_SATYPE_IPCOMP;
529                 break;
530         default:
531                 return 0;
532         }
533         /* NOTREACHED */
534 }
535
536 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
537  * say specifically 'just raw sockets' as we encode them as 255.
538  */
539
540 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
541 {
542         return (proto == IPSEC_PROTO_ANY ? 0 : proto);
543 }
544
545 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
546 {
547         return (proto ? proto : IPSEC_PROTO_ANY);
548 }
549
550 static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
551                                      xfrm_address_t *xaddr)
552 {
553         switch (((struct sockaddr*)(addr + 1))->sa_family) {
554         case AF_INET:
555                 xaddr->a4 =
556                         ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
557                 return AF_INET;
558 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
559         case AF_INET6:
560                 memcpy(xaddr->a6,
561                        &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
562                        sizeof(struct in6_addr));
563                 return AF_INET6;
564 #endif
565         default:
566                 return 0;
567         }
568         /* NOTREACHED */
569 }
570
571 static struct  xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
572 {
573         struct sadb_sa *sa;
574         struct sadb_address *addr;
575         uint16_t proto;
576         unsigned short family;
577         xfrm_address_t *xaddr;
578
579         sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
580         if (sa == NULL)
581                 return NULL;
582
583         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
584         if (proto == 0)
585                 return NULL;
586
587         /* sadb_address_len should be checked by caller */
588         addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
589         if (addr == NULL)
590                 return NULL;
591
592         family = ((struct sockaddr *)(addr + 1))->sa_family;
593         switch (family) {
594         case AF_INET:
595                 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
596                 break;
597 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
598         case AF_INET6:
599                 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
600                 break;
601 #endif
602         default:
603                 xaddr = NULL;
604         }
605
606         if (!xaddr)
607                 return NULL;
608
609         return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
610 }
611
612 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
613 static int
614 pfkey_sockaddr_size(sa_family_t family)
615 {
616         switch (family) {
617         case AF_INET:
618                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
619 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
620         case AF_INET6:
621                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
622 #endif
623         default:
624                 return 0;
625         }
626         /* NOTREACHED */
627 }
628
629 static inline int pfkey_mode_from_xfrm(int mode)
630 {
631         switch(mode) {
632         case XFRM_MODE_TRANSPORT:
633                 return IPSEC_MODE_TRANSPORT;
634         case XFRM_MODE_TUNNEL:
635                 return IPSEC_MODE_TUNNEL;
636         case XFRM_MODE_BEET:
637                 return IPSEC_MODE_BEET;
638         default:
639                 return -1;
640         }
641 }
642
643 static inline int pfkey_mode_to_xfrm(int mode)
644 {
645         switch(mode) {
646         case IPSEC_MODE_ANY:    /*XXX*/
647         case IPSEC_MODE_TRANSPORT:
648                 return XFRM_MODE_TRANSPORT;
649         case IPSEC_MODE_TUNNEL:
650                 return XFRM_MODE_TUNNEL;
651         case IPSEC_MODE_BEET:
652                 return XFRM_MODE_BEET;
653         default:
654                 return -1;
655         }
656 }
657
658 static struct sk_buff *__pfkey_xfrm_state2msg(struct xfrm_state *x,
659                                               int add_keys, int hsc)
660 {
661         struct sk_buff *skb;
662         struct sadb_msg *hdr;
663         struct sadb_sa *sa;
664         struct sadb_lifetime *lifetime;
665         struct sadb_address *addr;
666         struct sadb_key *key;
667         struct sadb_x_sa2 *sa2;
668         struct sockaddr_in *sin;
669         struct sadb_x_sec_ctx *sec_ctx;
670         struct xfrm_sec_ctx *xfrm_ctx;
671         int ctx_size = 0;
672 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
673         struct sockaddr_in6 *sin6;
674 #endif
675         int size;
676         int auth_key_size = 0;
677         int encrypt_key_size = 0;
678         int sockaddr_size;
679         struct xfrm_encap_tmpl *natt = NULL;
680         int mode;
681
682         /* address family check */
683         sockaddr_size = pfkey_sockaddr_size(x->props.family);
684         if (!sockaddr_size)
685                 return ERR_PTR(-EINVAL);
686
687         /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
688            key(AE), (identity(SD),) (sensitivity)> */
689         size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
690                 sizeof(struct sadb_lifetime) +
691                 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
692                 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
693                         sizeof(struct sadb_address)*2 +
694                                 sockaddr_size*2 +
695                                         sizeof(struct sadb_x_sa2);
696
697         if ((xfrm_ctx = x->security)) {
698                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
699                 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
700         }
701
702         /* identity & sensitivity */
703
704         if ((x->props.family == AF_INET &&
705              x->sel.saddr.a4 != x->props.saddr.a4)
706 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
707             || (x->props.family == AF_INET6 &&
708                 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
709 #endif
710                 )
711                 size += sizeof(struct sadb_address) + sockaddr_size;
712
713         if (add_keys) {
714                 if (x->aalg && x->aalg->alg_key_len) {
715                         auth_key_size =
716                                 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
717                         size += sizeof(struct sadb_key) + auth_key_size;
718                 }
719                 if (x->ealg && x->ealg->alg_key_len) {
720                         encrypt_key_size =
721                                 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
722                         size += sizeof(struct sadb_key) + encrypt_key_size;
723                 }
724         }
725         if (x->encap)
726                 natt = x->encap;
727
728         if (natt && natt->encap_type) {
729                 size += sizeof(struct sadb_x_nat_t_type);
730                 size += sizeof(struct sadb_x_nat_t_port);
731                 size += sizeof(struct sadb_x_nat_t_port);
732         }
733
734         skb =  alloc_skb(size + 16, GFP_ATOMIC);
735         if (skb == NULL)
736                 return ERR_PTR(-ENOBUFS);
737
738         /* call should fill header later */
739         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
740         memset(hdr, 0, size);   /* XXX do we need this ? */
741         hdr->sadb_msg_len = size / sizeof(uint64_t);
742
743         /* sa */
744         sa = (struct sadb_sa *)  skb_put(skb, sizeof(struct sadb_sa));
745         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
746         sa->sadb_sa_exttype = SADB_EXT_SA;
747         sa->sadb_sa_spi = x->id.spi;
748         sa->sadb_sa_replay = x->props.replay_window;
749         switch (x->km.state) {
750         case XFRM_STATE_VALID:
751                 sa->sadb_sa_state = x->km.dying ?
752                         SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
753                 break;
754         case XFRM_STATE_ACQ:
755                 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
756                 break;
757         default:
758                 sa->sadb_sa_state = SADB_SASTATE_DEAD;
759                 break;
760         }
761         sa->sadb_sa_auth = 0;
762         if (x->aalg) {
763                 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
764                 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
765         }
766         sa->sadb_sa_encrypt = 0;
767         BUG_ON(x->ealg && x->calg);
768         if (x->ealg) {
769                 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
770                 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
771         }
772         /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
773         if (x->calg) {
774                 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
775                 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
776         }
777
778         sa->sadb_sa_flags = 0;
779         if (x->props.flags & XFRM_STATE_NOECN)
780                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
781         if (x->props.flags & XFRM_STATE_DECAP_DSCP)
782                 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
783         if (x->props.flags & XFRM_STATE_NOPMTUDISC)
784                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
785
786         /* hard time */
787         if (hsc & 2) {
788                 lifetime = (struct sadb_lifetime *)  skb_put(skb,
789                                                              sizeof(struct sadb_lifetime));
790                 lifetime->sadb_lifetime_len =
791                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
792                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
793                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.hard_packet_limit);
794                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
795                 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
796                 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
797         }
798         /* soft time */
799         if (hsc & 1) {
800                 lifetime = (struct sadb_lifetime *)  skb_put(skb,
801                                                              sizeof(struct sadb_lifetime));
802                 lifetime->sadb_lifetime_len =
803                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
804                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
805                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.soft_packet_limit);
806                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
807                 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
808                 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
809         }
810         /* current time */
811         lifetime = (struct sadb_lifetime *)  skb_put(skb,
812                                                      sizeof(struct sadb_lifetime));
813         lifetime->sadb_lifetime_len =
814                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
815         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
816         lifetime->sadb_lifetime_allocations = x->curlft.packets;
817         lifetime->sadb_lifetime_bytes = x->curlft.bytes;
818         lifetime->sadb_lifetime_addtime = x->curlft.add_time;
819         lifetime->sadb_lifetime_usetime = x->curlft.use_time;
820         /* src address */
821         addr = (struct sadb_address*) skb_put(skb,
822                                               sizeof(struct sadb_address)+sockaddr_size);
823         addr->sadb_address_len =
824                 (sizeof(struct sadb_address)+sockaddr_size)/
825                         sizeof(uint64_t);
826         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
827         /* "if the ports are non-zero, then the sadb_address_proto field,
828            normally zero, MUST be filled in with the transport
829            protocol's number." - RFC2367 */
830         addr->sadb_address_proto = 0;
831         addr->sadb_address_reserved = 0;
832         if (x->props.family == AF_INET) {
833                 addr->sadb_address_prefixlen = 32;
834
835                 sin = (struct sockaddr_in *) (addr + 1);
836                 sin->sin_family = AF_INET;
837                 sin->sin_addr.s_addr = x->props.saddr.a4;
838                 sin->sin_port = 0;
839                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
840         }
841 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
842         else if (x->props.family == AF_INET6) {
843                 addr->sadb_address_prefixlen = 128;
844
845                 sin6 = (struct sockaddr_in6 *) (addr + 1);
846                 sin6->sin6_family = AF_INET6;
847                 sin6->sin6_port = 0;
848                 sin6->sin6_flowinfo = 0;
849                 memcpy(&sin6->sin6_addr, x->props.saddr.a6,
850                        sizeof(struct in6_addr));
851                 sin6->sin6_scope_id = 0;
852         }
853 #endif
854         else
855                 BUG();
856
857         /* dst address */
858         addr = (struct sadb_address*) skb_put(skb,
859                                               sizeof(struct sadb_address)+sockaddr_size);
860         addr->sadb_address_len =
861                 (sizeof(struct sadb_address)+sockaddr_size)/
862                         sizeof(uint64_t);
863         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
864         addr->sadb_address_proto = 0;
865         addr->sadb_address_prefixlen = 32; /* XXX */
866         addr->sadb_address_reserved = 0;
867         if (x->props.family == AF_INET) {
868                 sin = (struct sockaddr_in *) (addr + 1);
869                 sin->sin_family = AF_INET;
870                 sin->sin_addr.s_addr = x->id.daddr.a4;
871                 sin->sin_port = 0;
872                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
873
874                 if (x->sel.saddr.a4 != x->props.saddr.a4) {
875                         addr = (struct sadb_address*) skb_put(skb,
876                                 sizeof(struct sadb_address)+sockaddr_size);
877                         addr->sadb_address_len =
878                                 (sizeof(struct sadb_address)+sockaddr_size)/
879                                 sizeof(uint64_t);
880                         addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
881                         addr->sadb_address_proto =
882                                 pfkey_proto_from_xfrm(x->sel.proto);
883                         addr->sadb_address_prefixlen = x->sel.prefixlen_s;
884                         addr->sadb_address_reserved = 0;
885
886                         sin = (struct sockaddr_in *) (addr + 1);
887                         sin->sin_family = AF_INET;
888                         sin->sin_addr.s_addr = x->sel.saddr.a4;
889                         sin->sin_port = x->sel.sport;
890                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
891                 }
892         }
893 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
894         else if (x->props.family == AF_INET6) {
895                 addr->sadb_address_prefixlen = 128;
896
897                 sin6 = (struct sockaddr_in6 *) (addr + 1);
898                 sin6->sin6_family = AF_INET6;
899                 sin6->sin6_port = 0;
900                 sin6->sin6_flowinfo = 0;
901                 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
902                 sin6->sin6_scope_id = 0;
903
904                 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
905                             sizeof(struct in6_addr))) {
906                         addr = (struct sadb_address *) skb_put(skb,
907                                 sizeof(struct sadb_address)+sockaddr_size);
908                         addr->sadb_address_len =
909                                 (sizeof(struct sadb_address)+sockaddr_size)/
910                                 sizeof(uint64_t);
911                         addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
912                         addr->sadb_address_proto =
913                                 pfkey_proto_from_xfrm(x->sel.proto);
914                         addr->sadb_address_prefixlen = x->sel.prefixlen_s;
915                         addr->sadb_address_reserved = 0;
916
917                         sin6 = (struct sockaddr_in6 *) (addr + 1);
918                         sin6->sin6_family = AF_INET6;
919                         sin6->sin6_port = x->sel.sport;
920                         sin6->sin6_flowinfo = 0;
921                         memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
922                                sizeof(struct in6_addr));
923                         sin6->sin6_scope_id = 0;
924                 }
925         }
926 #endif
927         else
928                 BUG();
929
930         /* auth key */
931         if (add_keys && auth_key_size) {
932                 key = (struct sadb_key *) skb_put(skb,
933                                                   sizeof(struct sadb_key)+auth_key_size);
934                 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
935                         sizeof(uint64_t);
936                 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
937                 key->sadb_key_bits = x->aalg->alg_key_len;
938                 key->sadb_key_reserved = 0;
939                 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
940         }
941         /* encrypt key */
942         if (add_keys && encrypt_key_size) {
943                 key = (struct sadb_key *) skb_put(skb,
944                                                   sizeof(struct sadb_key)+encrypt_key_size);
945                 key->sadb_key_len = (sizeof(struct sadb_key) +
946                                      encrypt_key_size) / sizeof(uint64_t);
947                 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
948                 key->sadb_key_bits = x->ealg->alg_key_len;
949                 key->sadb_key_reserved = 0;
950                 memcpy(key + 1, x->ealg->alg_key,
951                        (x->ealg->alg_key_len+7)/8);
952         }
953
954         /* sa */
955         sa2 = (struct sadb_x_sa2 *)  skb_put(skb, sizeof(struct sadb_x_sa2));
956         sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
957         sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
958         if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
959                 kfree_skb(skb);
960                 return ERR_PTR(-EINVAL);
961         }
962         sa2->sadb_x_sa2_mode = mode;
963         sa2->sadb_x_sa2_reserved1 = 0;
964         sa2->sadb_x_sa2_reserved2 = 0;
965         sa2->sadb_x_sa2_sequence = 0;
966         sa2->sadb_x_sa2_reqid = x->props.reqid;
967
968         if (natt && natt->encap_type) {
969                 struct sadb_x_nat_t_type *n_type;
970                 struct sadb_x_nat_t_port *n_port;
971
972                 /* type */
973                 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
974                 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
975                 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
976                 n_type->sadb_x_nat_t_type_type = natt->encap_type;
977                 n_type->sadb_x_nat_t_type_reserved[0] = 0;
978                 n_type->sadb_x_nat_t_type_reserved[1] = 0;
979                 n_type->sadb_x_nat_t_type_reserved[2] = 0;
980
981                 /* source port */
982                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
983                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
984                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
985                 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
986                 n_port->sadb_x_nat_t_port_reserved = 0;
987
988                 /* dest port */
989                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
990                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
991                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
992                 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
993                 n_port->sadb_x_nat_t_port_reserved = 0;
994         }
995
996         /* security context */
997         if (xfrm_ctx) {
998                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
999                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1000                 sec_ctx->sadb_x_sec_len =
1001                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1002                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1003                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1004                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1005                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1006                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1007                        xfrm_ctx->ctx_len);
1008         }
1009
1010         return skb;
1011 }
1012
1013
1014 static inline struct sk_buff *pfkey_xfrm_state2msg(struct xfrm_state *x)
1015 {
1016         struct sk_buff *skb;
1017
1018         spin_lock_bh(&x->lock);
1019         skb = __pfkey_xfrm_state2msg(x, 1, 3);
1020         spin_unlock_bh(&x->lock);
1021
1022         return skb;
1023 }
1024
1025 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x,
1026                                                           int hsc)
1027 {
1028         return __pfkey_xfrm_state2msg(x, 0, hsc);
1029 }
1030
1031 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1032                                                 void **ext_hdrs)
1033 {
1034         struct xfrm_state *x;
1035         struct sadb_lifetime *lifetime;
1036         struct sadb_sa *sa;
1037         struct sadb_key *key;
1038         struct sadb_x_sec_ctx *sec_ctx;
1039         uint16_t proto;
1040         int err;
1041
1042
1043         sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1044         if (!sa ||
1045             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1046                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1047                 return ERR_PTR(-EINVAL);
1048         if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1049             !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1050                 return ERR_PTR(-EINVAL);
1051         if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1052             !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1053                 return ERR_PTR(-EINVAL);
1054         if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1055             !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1056                 return ERR_PTR(-EINVAL);
1057
1058         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1059         if (proto == 0)
1060                 return ERR_PTR(-EINVAL);
1061
1062         /* default error is no buffer space */
1063         err = -ENOBUFS;
1064
1065         /* RFC2367:
1066
1067    Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1068    SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1069    sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1070    Therefore, the sadb_sa_state field of all submitted SAs MUST be
1071    SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1072    not true.
1073
1074            However, KAME setkey always uses SADB_SASTATE_LARVAL.
1075            Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1076          */
1077         if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1078             (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1079              sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1080             sa->sadb_sa_encrypt > SADB_EALG_MAX)
1081                 return ERR_PTR(-EINVAL);
1082         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1083         if (key != NULL &&
1084             sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1085             ((key->sadb_key_bits+7) / 8 == 0 ||
1086              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1087                 return ERR_PTR(-EINVAL);
1088         key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1089         if (key != NULL &&
1090             sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1091             ((key->sadb_key_bits+7) / 8 == 0 ||
1092              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1093                 return ERR_PTR(-EINVAL);
1094
1095         x = xfrm_state_alloc();
1096         if (x == NULL)
1097                 return ERR_PTR(-ENOBUFS);
1098
1099         x->id.proto = proto;
1100         x->id.spi = sa->sadb_sa_spi;
1101         x->props.replay_window = sa->sadb_sa_replay;
1102         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1103                 x->props.flags |= XFRM_STATE_NOECN;
1104         if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1105                 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1106         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1107                 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1108
1109         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1110         if (lifetime != NULL) {
1111                 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1112                 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1113                 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1114                 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1115         }
1116         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1117         if (lifetime != NULL) {
1118                 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1119                 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1120                 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1121                 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1122         }
1123
1124         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1125         if (sec_ctx != NULL) {
1126                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1127
1128                 if (!uctx)
1129                         goto out;
1130
1131                 err = security_xfrm_state_alloc(x, uctx);
1132                 kfree(uctx);
1133
1134                 if (err)
1135                         goto out;
1136         }
1137
1138         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1139         if (sa->sadb_sa_auth) {
1140                 int keysize = 0;
1141                 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1142                 if (!a) {
1143                         err = -ENOSYS;
1144                         goto out;
1145                 }
1146                 if (key)
1147                         keysize = (key->sadb_key_bits + 7) / 8;
1148                 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1149                 if (!x->aalg)
1150                         goto out;
1151                 strcpy(x->aalg->alg_name, a->name);
1152                 x->aalg->alg_key_len = 0;
1153                 if (key) {
1154                         x->aalg->alg_key_len = key->sadb_key_bits;
1155                         memcpy(x->aalg->alg_key, key+1, keysize);
1156                 }
1157                 x->props.aalgo = sa->sadb_sa_auth;
1158                 /* x->algo.flags = sa->sadb_sa_flags; */
1159         }
1160         if (sa->sadb_sa_encrypt) {
1161                 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1162                         struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1163                         if (!a) {
1164                                 err = -ENOSYS;
1165                                 goto out;
1166                         }
1167                         x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1168                         if (!x->calg)
1169                                 goto out;
1170                         strcpy(x->calg->alg_name, a->name);
1171                         x->props.calgo = sa->sadb_sa_encrypt;
1172                 } else {
1173                         int keysize = 0;
1174                         struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1175                         if (!a) {
1176                                 err = -ENOSYS;
1177                                 goto out;
1178                         }
1179                         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1180                         if (key)
1181                                 keysize = (key->sadb_key_bits + 7) / 8;
1182                         x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1183                         if (!x->ealg)
1184                                 goto out;
1185                         strcpy(x->ealg->alg_name, a->name);
1186                         x->ealg->alg_key_len = 0;
1187                         if (key) {
1188                                 x->ealg->alg_key_len = key->sadb_key_bits;
1189                                 memcpy(x->ealg->alg_key, key+1, keysize);
1190                         }
1191                         x->props.ealgo = sa->sadb_sa_encrypt;
1192                 }
1193         }
1194         /* x->algo.flags = sa->sadb_sa_flags; */
1195
1196         x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1197                                                     &x->props.saddr);
1198         if (!x->props.family) {
1199                 err = -EAFNOSUPPORT;
1200                 goto out;
1201         }
1202         pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1203                                   &x->id.daddr);
1204
1205         if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1206                 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1207                 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1208                 if (mode < 0) {
1209                         err = -EINVAL;
1210                         goto out;
1211                 }
1212                 x->props.mode = mode;
1213                 x->props.reqid = sa2->sadb_x_sa2_reqid;
1214         }
1215
1216         if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1217                 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1218
1219                 /* Nobody uses this, but we try. */
1220                 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1221                 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1222         }
1223
1224         if (!x->sel.family)
1225                 x->sel.family = x->props.family;
1226
1227         if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1228                 struct sadb_x_nat_t_type* n_type;
1229                 struct xfrm_encap_tmpl *natt;
1230
1231                 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1232                 if (!x->encap)
1233                         goto out;
1234
1235                 natt = x->encap;
1236                 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1237                 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1238
1239                 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1240                         struct sadb_x_nat_t_port* n_port =
1241                                 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1242                         natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1243                 }
1244                 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1245                         struct sadb_x_nat_t_port* n_port =
1246                                 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1247                         natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1248                 }
1249         }
1250
1251         err = xfrm_init_state(x);
1252         if (err)
1253                 goto out;
1254
1255         x->km.seq = hdr->sadb_msg_seq;
1256         return x;
1257
1258 out:
1259         x->km.state = XFRM_STATE_DEAD;
1260         xfrm_state_put(x);
1261         return ERR_PTR(err);
1262 }
1263
1264 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1265 {
1266         return -EOPNOTSUPP;
1267 }
1268
1269 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1270 {
1271         struct sk_buff *resp_skb;
1272         struct sadb_x_sa2 *sa2;
1273         struct sadb_address *saddr, *daddr;
1274         struct sadb_msg *out_hdr;
1275         struct sadb_spirange *range;
1276         struct xfrm_state *x = NULL;
1277         int mode;
1278         int err;
1279         u32 min_spi, max_spi;
1280         u32 reqid;
1281         u8 proto;
1282         unsigned short family;
1283         xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1284
1285         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1286                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1287                 return -EINVAL;
1288
1289         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1290         if (proto == 0)
1291                 return -EINVAL;
1292
1293         if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1294                 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1295                 if (mode < 0)
1296                         return -EINVAL;
1297                 reqid = sa2->sadb_x_sa2_reqid;
1298         } else {
1299                 mode = 0;
1300                 reqid = 0;
1301         }
1302
1303         saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1304         daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1305
1306         family = ((struct sockaddr *)(saddr + 1))->sa_family;
1307         switch (family) {
1308         case AF_INET:
1309                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1310                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1311                 break;
1312 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1313         case AF_INET6:
1314                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1315                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1316                 break;
1317 #endif
1318         }
1319
1320         if (hdr->sadb_msg_seq) {
1321                 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1322                 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1323                         xfrm_state_put(x);
1324                         x = NULL;
1325                 }
1326         }
1327
1328         if (!x)
1329                 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1330
1331         if (x == NULL)
1332                 return -ENOENT;
1333
1334         min_spi = 0x100;
1335         max_spi = 0x0fffffff;
1336
1337         range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1338         if (range) {
1339                 min_spi = range->sadb_spirange_min;
1340                 max_spi = range->sadb_spirange_max;
1341         }
1342
1343         err = xfrm_alloc_spi(x, min_spi, max_spi);
1344         resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1345
1346         if (IS_ERR(resp_skb)) {
1347                 xfrm_state_put(x);
1348                 return  PTR_ERR(resp_skb);
1349         }
1350
1351         out_hdr = (struct sadb_msg *) resp_skb->data;
1352         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1353         out_hdr->sadb_msg_type = SADB_GETSPI;
1354         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1355         out_hdr->sadb_msg_errno = 0;
1356         out_hdr->sadb_msg_reserved = 0;
1357         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1358         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1359
1360         xfrm_state_put(x);
1361
1362         pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1363
1364         return 0;
1365 }
1366
1367 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1368 {
1369         struct xfrm_state *x;
1370
1371         if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1372                 return -EOPNOTSUPP;
1373
1374         if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1375                 return 0;
1376
1377         x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1378         if (x == NULL)
1379                 return 0;
1380
1381         spin_lock_bh(&x->lock);
1382         if (x->km.state == XFRM_STATE_ACQ) {
1383                 x->km.state = XFRM_STATE_ERROR;
1384                 wake_up(&km_waitq);
1385         }
1386         spin_unlock_bh(&x->lock);
1387         xfrm_state_put(x);
1388         return 0;
1389 }
1390
1391 static inline int event2poltype(int event)
1392 {
1393         switch (event) {
1394         case XFRM_MSG_DELPOLICY:
1395                 return SADB_X_SPDDELETE;
1396         case XFRM_MSG_NEWPOLICY:
1397                 return SADB_X_SPDADD;
1398         case XFRM_MSG_UPDPOLICY:
1399                 return SADB_X_SPDUPDATE;
1400         case XFRM_MSG_POLEXPIRE:
1401         //      return SADB_X_SPDEXPIRE;
1402         default:
1403                 printk("pfkey: Unknown policy event %d\n", event);
1404                 break;
1405         }
1406
1407         return 0;
1408 }
1409
1410 static inline int event2keytype(int event)
1411 {
1412         switch (event) {
1413         case XFRM_MSG_DELSA:
1414                 return SADB_DELETE;
1415         case XFRM_MSG_NEWSA:
1416                 return SADB_ADD;
1417         case XFRM_MSG_UPDSA:
1418                 return SADB_UPDATE;
1419         case XFRM_MSG_EXPIRE:
1420                 return SADB_EXPIRE;
1421         default:
1422                 printk("pfkey: Unknown SA event %d\n", event);
1423                 break;
1424         }
1425
1426         return 0;
1427 }
1428
1429 /* ADD/UPD/DEL */
1430 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1431 {
1432         struct sk_buff *skb;
1433         struct sadb_msg *hdr;
1434
1435         skb = pfkey_xfrm_state2msg(x);
1436
1437         if (IS_ERR(skb))
1438                 return PTR_ERR(skb);
1439
1440         hdr = (struct sadb_msg *) skb->data;
1441         hdr->sadb_msg_version = PF_KEY_V2;
1442         hdr->sadb_msg_type = event2keytype(c->event);
1443         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1444         hdr->sadb_msg_errno = 0;
1445         hdr->sadb_msg_reserved = 0;
1446         hdr->sadb_msg_seq = c->seq;
1447         hdr->sadb_msg_pid = c->pid;
1448
1449         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1450
1451         return 0;
1452 }
1453
1454 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1455 {
1456         struct xfrm_state *x;
1457         int err;
1458         struct km_event c;
1459
1460         x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1461         if (IS_ERR(x))
1462                 return PTR_ERR(x);
1463
1464         xfrm_state_hold(x);
1465         if (hdr->sadb_msg_type == SADB_ADD)
1466                 err = xfrm_state_add(x);
1467         else
1468                 err = xfrm_state_update(x);
1469
1470         xfrm_audit_state_add(x, err ? 0 : 1,
1471                              audit_get_loginuid(current->audit_context), 0);
1472
1473         if (err < 0) {
1474                 x->km.state = XFRM_STATE_DEAD;
1475                 __xfrm_state_put(x);
1476                 goto out;
1477         }
1478
1479         if (hdr->sadb_msg_type == SADB_ADD)
1480                 c.event = XFRM_MSG_NEWSA;
1481         else
1482                 c.event = XFRM_MSG_UPDSA;
1483         c.seq = hdr->sadb_msg_seq;
1484         c.pid = hdr->sadb_msg_pid;
1485         km_state_notify(x, &c);
1486 out:
1487         xfrm_state_put(x);
1488         return err;
1489 }
1490
1491 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1492 {
1493         struct xfrm_state *x;
1494         struct km_event c;
1495         int err;
1496
1497         if (!ext_hdrs[SADB_EXT_SA-1] ||
1498             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1499                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1500                 return -EINVAL;
1501
1502         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1503         if (x == NULL)
1504                 return -ESRCH;
1505
1506         if ((err = security_xfrm_state_delete(x)))
1507                 goto out;
1508
1509         if (xfrm_state_kern(x)) {
1510                 err = -EPERM;
1511                 goto out;
1512         }
1513
1514         err = xfrm_state_delete(x);
1515
1516         if (err < 0)
1517                 goto out;
1518
1519         c.seq = hdr->sadb_msg_seq;
1520         c.pid = hdr->sadb_msg_pid;
1521         c.event = XFRM_MSG_DELSA;
1522         km_state_notify(x, &c);
1523 out:
1524         xfrm_audit_state_delete(x, err ? 0 : 1,
1525                                audit_get_loginuid(current->audit_context), 0);
1526         xfrm_state_put(x);
1527
1528         return err;
1529 }
1530
1531 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1532 {
1533         __u8 proto;
1534         struct sk_buff *out_skb;
1535         struct sadb_msg *out_hdr;
1536         struct xfrm_state *x;
1537
1538         if (!ext_hdrs[SADB_EXT_SA-1] ||
1539             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1540                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1541                 return -EINVAL;
1542
1543         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1544         if (x == NULL)
1545                 return -ESRCH;
1546
1547         out_skb = pfkey_xfrm_state2msg(x);
1548         proto = x->id.proto;
1549         xfrm_state_put(x);
1550         if (IS_ERR(out_skb))
1551                 return  PTR_ERR(out_skb);
1552
1553         out_hdr = (struct sadb_msg *) out_skb->data;
1554         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1555         out_hdr->sadb_msg_type = SADB_GET;
1556         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1557         out_hdr->sadb_msg_errno = 0;
1558         out_hdr->sadb_msg_reserved = 0;
1559         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1560         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1561         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1562
1563         return 0;
1564 }
1565
1566 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1567                                               gfp_t allocation)
1568 {
1569         struct sk_buff *skb;
1570         struct sadb_msg *hdr;
1571         int len, auth_len, enc_len, i;
1572
1573         auth_len = xfrm_count_auth_supported();
1574         if (auth_len) {
1575                 auth_len *= sizeof(struct sadb_alg);
1576                 auth_len += sizeof(struct sadb_supported);
1577         }
1578
1579         enc_len = xfrm_count_enc_supported();
1580         if (enc_len) {
1581                 enc_len *= sizeof(struct sadb_alg);
1582                 enc_len += sizeof(struct sadb_supported);
1583         }
1584
1585         len = enc_len + auth_len + sizeof(struct sadb_msg);
1586
1587         skb = alloc_skb(len + 16, allocation);
1588         if (!skb)
1589                 goto out_put_algs;
1590
1591         hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1592         pfkey_hdr_dup(hdr, orig);
1593         hdr->sadb_msg_errno = 0;
1594         hdr->sadb_msg_len = len / sizeof(uint64_t);
1595
1596         if (auth_len) {
1597                 struct sadb_supported *sp;
1598                 struct sadb_alg *ap;
1599
1600                 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1601                 ap = (struct sadb_alg *) (sp + 1);
1602
1603                 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1604                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1605
1606                 for (i = 0; ; i++) {
1607                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1608                         if (!aalg)
1609                                 break;
1610                         if (aalg->available)
1611                                 *ap++ = aalg->desc;
1612                 }
1613         }
1614
1615         if (enc_len) {
1616                 struct sadb_supported *sp;
1617                 struct sadb_alg *ap;
1618
1619                 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1620                 ap = (struct sadb_alg *) (sp + 1);
1621
1622                 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1623                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1624
1625                 for (i = 0; ; i++) {
1626                         struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1627                         if (!ealg)
1628                                 break;
1629                         if (ealg->available)
1630                                 *ap++ = ealg->desc;
1631                 }
1632         }
1633
1634 out_put_algs:
1635         return skb;
1636 }
1637
1638 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1639 {
1640         struct pfkey_sock *pfk = pfkey_sk(sk);
1641         struct sk_buff *supp_skb;
1642
1643         if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1644                 return -EINVAL;
1645
1646         if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1647                 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1648                         return -EEXIST;
1649                 pfk->registered |= (1<<hdr->sadb_msg_satype);
1650         }
1651
1652         xfrm_probe_algs();
1653
1654         supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1655         if (!supp_skb) {
1656                 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1657                         pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1658
1659                 return -ENOBUFS;
1660         }
1661
1662         pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1663
1664         return 0;
1665 }
1666
1667 static int key_notify_sa_flush(struct km_event *c)
1668 {
1669         struct sk_buff *skb;
1670         struct sadb_msg *hdr;
1671
1672         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1673         if (!skb)
1674                 return -ENOBUFS;
1675         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1676         hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1677         hdr->sadb_msg_type = SADB_FLUSH;
1678         hdr->sadb_msg_seq = c->seq;
1679         hdr->sadb_msg_pid = c->pid;
1680         hdr->sadb_msg_version = PF_KEY_V2;
1681         hdr->sadb_msg_errno = (uint8_t) 0;
1682         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1683
1684         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1685
1686         return 0;
1687 }
1688
1689 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1690 {
1691         unsigned proto;
1692         struct km_event c;
1693         struct xfrm_audit audit_info;
1694         int err;
1695
1696         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1697         if (proto == 0)
1698                 return -EINVAL;
1699
1700         audit_info.loginuid = audit_get_loginuid(current->audit_context);
1701         audit_info.secid = 0;
1702         err = xfrm_state_flush(proto, &audit_info);
1703         if (err)
1704                 return err;
1705         c.data.proto = proto;
1706         c.seq = hdr->sadb_msg_seq;
1707         c.pid = hdr->sadb_msg_pid;
1708         c.event = XFRM_MSG_FLUSHSA;
1709         km_state_notify(NULL, &c);
1710
1711         return 0;
1712 }
1713
1714 struct pfkey_dump_data
1715 {
1716         struct sk_buff *skb;
1717         struct sadb_msg *hdr;
1718         struct sock *sk;
1719 };
1720
1721 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1722 {
1723         struct pfkey_dump_data *data = ptr;
1724         struct sk_buff *out_skb;
1725         struct sadb_msg *out_hdr;
1726
1727         out_skb = pfkey_xfrm_state2msg(x);
1728         if (IS_ERR(out_skb))
1729                 return PTR_ERR(out_skb);
1730
1731         out_hdr = (struct sadb_msg *) out_skb->data;
1732         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1733         out_hdr->sadb_msg_type = SADB_DUMP;
1734         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1735         out_hdr->sadb_msg_errno = 0;
1736         out_hdr->sadb_msg_reserved = 0;
1737         out_hdr->sadb_msg_seq = count;
1738         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1739         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1740         return 0;
1741 }
1742
1743 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1744 {
1745         u8 proto;
1746         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1747
1748         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1749         if (proto == 0)
1750                 return -EINVAL;
1751
1752         return xfrm_state_walk(proto, dump_sa, &data);
1753 }
1754
1755 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1756 {
1757         struct pfkey_sock *pfk = pfkey_sk(sk);
1758         int satype = hdr->sadb_msg_satype;
1759
1760         if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1761                 /* XXX we mangle packet... */
1762                 hdr->sadb_msg_errno = 0;
1763                 if (satype != 0 && satype != 1)
1764                         return -EINVAL;
1765                 pfk->promisc = satype;
1766         }
1767         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1768         return 0;
1769 }
1770
1771 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1772 {
1773         int i;
1774         u32 reqid = *(u32*)ptr;
1775
1776         for (i=0; i<xp->xfrm_nr; i++) {
1777                 if (xp->xfrm_vec[i].reqid == reqid)
1778                         return -EEXIST;
1779         }
1780         return 0;
1781 }
1782
1783 static u32 gen_reqid(void)
1784 {
1785         u32 start;
1786         static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1787
1788         start = reqid;
1789         do {
1790                 ++reqid;
1791                 if (reqid == 0)
1792                         reqid = IPSEC_MANUAL_REQID_MAX+1;
1793                 if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid,
1794                                      (void*)&reqid) != -EEXIST)
1795                         return reqid;
1796         } while (reqid != start);
1797         return 0;
1798 }
1799
1800 static int
1801 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1802 {
1803         struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1804         struct sockaddr_in *sin;
1805 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1806         struct sockaddr_in6 *sin6;
1807 #endif
1808         int mode;
1809
1810         if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1811                 return -ELOOP;
1812
1813         if (rq->sadb_x_ipsecrequest_mode == 0)
1814                 return -EINVAL;
1815
1816         t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1817         if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1818                 return -EINVAL;
1819         t->mode = mode;
1820         if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1821                 t->optional = 1;
1822         else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1823                 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1824                 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1825                         t->reqid = 0;
1826                 if (!t->reqid && !(t->reqid = gen_reqid()))
1827                         return -ENOBUFS;
1828         }
1829
1830         /* addresses present only in tunnel mode */
1831         if (t->mode == XFRM_MODE_TUNNEL) {
1832                 struct sockaddr *sa;
1833                 sa = (struct sockaddr *)(rq+1);
1834                 switch(sa->sa_family) {
1835                 case AF_INET:
1836                         sin = (struct sockaddr_in*)sa;
1837                         t->saddr.a4 = sin->sin_addr.s_addr;
1838                         sin++;
1839                         if (sin->sin_family != AF_INET)
1840                                 return -EINVAL;
1841                         t->id.daddr.a4 = sin->sin_addr.s_addr;
1842                         break;
1843 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1844                 case AF_INET6:
1845                         sin6 = (struct sockaddr_in6*)sa;
1846                         memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1847                         sin6++;
1848                         if (sin6->sin6_family != AF_INET6)
1849                                 return -EINVAL;
1850                         memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1851                         break;
1852 #endif
1853                 default:
1854                         return -EINVAL;
1855                 }
1856                 t->encap_family = sa->sa_family;
1857         } else
1858                 t->encap_family = xp->family;
1859
1860         /* No way to set this via kame pfkey */
1861         t->aalgos = t->ealgos = t->calgos = ~0;
1862         xp->xfrm_nr++;
1863         return 0;
1864 }
1865
1866 static int
1867 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1868 {
1869         int err;
1870         int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1871         struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1872
1873         while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1874                 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1875                         return err;
1876                 len -= rq->sadb_x_ipsecrequest_len;
1877                 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1878         }
1879         return 0;
1880 }
1881
1882 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1883 {
1884   struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1885
1886         if (xfrm_ctx) {
1887                 int len = sizeof(struct sadb_x_sec_ctx);
1888                 len += xfrm_ctx->ctx_len;
1889                 return PFKEY_ALIGN8(len);
1890         }
1891         return 0;
1892 }
1893
1894 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1895 {
1896         struct xfrm_tmpl *t;
1897         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1898         int socklen = 0;
1899         int i;
1900
1901         for (i=0; i<xp->xfrm_nr; i++) {
1902                 t = xp->xfrm_vec + i;
1903                 socklen += (t->encap_family == AF_INET ?
1904                             sizeof(struct sockaddr_in) :
1905                             sizeof(struct sockaddr_in6));
1906         }
1907
1908         return sizeof(struct sadb_msg) +
1909                 (sizeof(struct sadb_lifetime) * 3) +
1910                 (sizeof(struct sadb_address) * 2) +
1911                 (sockaddr_size * 2) +
1912                 sizeof(struct sadb_x_policy) +
1913                 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1914                 (socklen * 2) +
1915                 pfkey_xfrm_policy2sec_ctx_size(xp);
1916 }
1917
1918 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1919 {
1920         struct sk_buff *skb;
1921         int size;
1922
1923         size = pfkey_xfrm_policy2msg_size(xp);
1924
1925         skb =  alloc_skb(size + 16, GFP_ATOMIC);
1926         if (skb == NULL)
1927                 return ERR_PTR(-ENOBUFS);
1928
1929         return skb;
1930 }
1931
1932 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1933 {
1934         struct sadb_msg *hdr;
1935         struct sadb_address *addr;
1936         struct sadb_lifetime *lifetime;
1937         struct sadb_x_policy *pol;
1938         struct sockaddr_in   *sin;
1939         struct sadb_x_sec_ctx *sec_ctx;
1940         struct xfrm_sec_ctx *xfrm_ctx;
1941 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1942         struct sockaddr_in6  *sin6;
1943 #endif
1944         int i;
1945         int size;
1946         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1947         int socklen = (xp->family == AF_INET ?
1948                        sizeof(struct sockaddr_in) :
1949                        sizeof(struct sockaddr_in6));
1950
1951         size = pfkey_xfrm_policy2msg_size(xp);
1952
1953         /* call should fill header later */
1954         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1955         memset(hdr, 0, size);   /* XXX do we need this ? */
1956
1957         /* src address */
1958         addr = (struct sadb_address*) skb_put(skb,
1959                                               sizeof(struct sadb_address)+sockaddr_size);
1960         addr->sadb_address_len =
1961                 (sizeof(struct sadb_address)+sockaddr_size)/
1962                         sizeof(uint64_t);
1963         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1964         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1965         addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1966         addr->sadb_address_reserved = 0;
1967         /* src address */
1968         if (xp->family == AF_INET) {
1969                 sin = (struct sockaddr_in *) (addr + 1);
1970                 sin->sin_family = AF_INET;
1971                 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1972                 sin->sin_port = xp->selector.sport;
1973                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1974         }
1975 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1976         else if (xp->family == AF_INET6) {
1977                 sin6 = (struct sockaddr_in6 *) (addr + 1);
1978                 sin6->sin6_family = AF_INET6;
1979                 sin6->sin6_port = xp->selector.sport;
1980                 sin6->sin6_flowinfo = 0;
1981                 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1982                        sizeof(struct in6_addr));
1983                 sin6->sin6_scope_id = 0;
1984         }
1985 #endif
1986         else
1987                 BUG();
1988
1989         /* dst address */
1990         addr = (struct sadb_address*) skb_put(skb,
1991                                               sizeof(struct sadb_address)+sockaddr_size);
1992         addr->sadb_address_len =
1993                 (sizeof(struct sadb_address)+sockaddr_size)/
1994                         sizeof(uint64_t);
1995         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1996         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1997         addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1998         addr->sadb_address_reserved = 0;
1999         if (xp->family == AF_INET) {
2000                 sin = (struct sockaddr_in *) (addr + 1);
2001                 sin->sin_family = AF_INET;
2002                 sin->sin_addr.s_addr = xp->selector.daddr.a4;
2003                 sin->sin_port = xp->selector.dport;
2004                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2005         }
2006 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2007         else if (xp->family == AF_INET6) {
2008                 sin6 = (struct sockaddr_in6 *) (addr + 1);
2009                 sin6->sin6_family = AF_INET6;
2010                 sin6->sin6_port = xp->selector.dport;
2011                 sin6->sin6_flowinfo = 0;
2012                 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2013                        sizeof(struct in6_addr));
2014                 sin6->sin6_scope_id = 0;
2015         }
2016 #endif
2017         else
2018                 BUG();
2019
2020         /* hard time */
2021         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2022                                                      sizeof(struct sadb_lifetime));
2023         lifetime->sadb_lifetime_len =
2024                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2025         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2026         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.hard_packet_limit);
2027         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2028         lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2029         lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2030         /* soft time */
2031         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2032                                                      sizeof(struct sadb_lifetime));
2033         lifetime->sadb_lifetime_len =
2034                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2035         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2036         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.soft_packet_limit);
2037         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2038         lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2039         lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2040         /* current time */
2041         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2042                                                      sizeof(struct sadb_lifetime));
2043         lifetime->sadb_lifetime_len =
2044                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2045         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2046         lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2047         lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2048         lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2049         lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2050
2051         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
2052         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2053         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2054         pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2055         if (xp->action == XFRM_POLICY_ALLOW) {
2056                 if (xp->xfrm_nr)
2057                         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2058                 else
2059                         pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2060         }
2061         pol->sadb_x_policy_dir = dir+1;
2062         pol->sadb_x_policy_id = xp->index;
2063         pol->sadb_x_policy_priority = xp->priority;
2064
2065         for (i=0; i<xp->xfrm_nr; i++) {
2066                 struct sadb_x_ipsecrequest *rq;
2067                 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2068                 int req_size;
2069                 int mode;
2070
2071                 req_size = sizeof(struct sadb_x_ipsecrequest);
2072                 if (t->mode == XFRM_MODE_TUNNEL)
2073                         req_size += ((t->encap_family == AF_INET ?
2074                                      sizeof(struct sockaddr_in) :
2075                                      sizeof(struct sockaddr_in6)) * 2);
2076                 else
2077                         size -= 2*socklen;
2078                 rq = (void*)skb_put(skb, req_size);
2079                 pol->sadb_x_policy_len += req_size/8;
2080                 memset(rq, 0, sizeof(*rq));
2081                 rq->sadb_x_ipsecrequest_len = req_size;
2082                 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2083                 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2084                         return -EINVAL;
2085                 rq->sadb_x_ipsecrequest_mode = mode;
2086                 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2087                 if (t->reqid)
2088                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2089                 if (t->optional)
2090                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2091                 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2092                 if (t->mode == XFRM_MODE_TUNNEL) {
2093                         switch (t->encap_family) {
2094                         case AF_INET:
2095                                 sin = (void*)(rq+1);
2096                                 sin->sin_family = AF_INET;
2097                                 sin->sin_addr.s_addr = t->saddr.a4;
2098                                 sin->sin_port = 0;
2099                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2100                                 sin++;
2101                                 sin->sin_family = AF_INET;
2102                                 sin->sin_addr.s_addr = t->id.daddr.a4;
2103                                 sin->sin_port = 0;
2104                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2105                                 break;
2106 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2107                         case AF_INET6:
2108                                 sin6 = (void*)(rq+1);
2109                                 sin6->sin6_family = AF_INET6;
2110                                 sin6->sin6_port = 0;
2111                                 sin6->sin6_flowinfo = 0;
2112                                 memcpy(&sin6->sin6_addr, t->saddr.a6,
2113                                        sizeof(struct in6_addr));
2114                                 sin6->sin6_scope_id = 0;
2115
2116                                 sin6++;
2117                                 sin6->sin6_family = AF_INET6;
2118                                 sin6->sin6_port = 0;
2119                                 sin6->sin6_flowinfo = 0;
2120                                 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2121                                        sizeof(struct in6_addr));
2122                                 sin6->sin6_scope_id = 0;
2123                                 break;
2124 #endif
2125                         default:
2126                                 break;
2127                         }
2128                 }
2129         }
2130
2131         /* security context */
2132         if ((xfrm_ctx = xp->security)) {
2133                 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2134
2135                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2136                 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2137                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2138                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2139                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2140                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2141                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2142                        xfrm_ctx->ctx_len);
2143         }
2144
2145         hdr->sadb_msg_len = size / sizeof(uint64_t);
2146         hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2147
2148         return 0;
2149 }
2150
2151 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2152 {
2153         struct sk_buff *out_skb;
2154         struct sadb_msg *out_hdr;
2155         int err;
2156
2157         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2158         if (IS_ERR(out_skb)) {
2159                 err = PTR_ERR(out_skb);
2160                 goto out;
2161         }
2162         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2163         if (err < 0)
2164                 return err;
2165
2166         out_hdr = (struct sadb_msg *) out_skb->data;
2167         out_hdr->sadb_msg_version = PF_KEY_V2;
2168
2169         if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2170                 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2171         else
2172                 out_hdr->sadb_msg_type = event2poltype(c->event);
2173         out_hdr->sadb_msg_errno = 0;
2174         out_hdr->sadb_msg_seq = c->seq;
2175         out_hdr->sadb_msg_pid = c->pid;
2176         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2177 out:
2178         return 0;
2179
2180 }
2181
2182 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2183 {
2184         int err = 0;
2185         struct sadb_lifetime *lifetime;
2186         struct sadb_address *sa;
2187         struct sadb_x_policy *pol;
2188         struct xfrm_policy *xp;
2189         struct km_event c;
2190         struct sadb_x_sec_ctx *sec_ctx;
2191
2192         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2193                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2194             !ext_hdrs[SADB_X_EXT_POLICY-1])
2195                 return -EINVAL;
2196
2197         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2198         if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2199                 return -EINVAL;
2200         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2201                 return -EINVAL;
2202
2203         xp = xfrm_policy_alloc(GFP_KERNEL);
2204         if (xp == NULL)
2205                 return -ENOBUFS;
2206
2207         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2208                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2209         xp->priority = pol->sadb_x_policy_priority;
2210
2211         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2212         xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2213         if (!xp->family) {
2214                 err = -EINVAL;
2215                 goto out;
2216         }
2217         xp->selector.family = xp->family;
2218         xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2219         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2220         xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2221         if (xp->selector.sport)
2222                 xp->selector.sport_mask = htons(0xffff);
2223
2224         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2225         pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2226         xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2227
2228         /* Amusing, we set this twice.  KAME apps appear to set same value
2229          * in both addresses.
2230          */
2231         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2232
2233         xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2234         if (xp->selector.dport)
2235                 xp->selector.dport_mask = htons(0xffff);
2236
2237         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2238         if (sec_ctx != NULL) {
2239                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2240
2241                 if (!uctx) {
2242                         err = -ENOBUFS;
2243                         goto out;
2244                 }
2245
2246                 err = security_xfrm_policy_alloc(xp, uctx);
2247                 kfree(uctx);
2248
2249                 if (err)
2250                         goto out;
2251         }
2252
2253         xp->lft.soft_byte_limit = XFRM_INF;
2254         xp->lft.hard_byte_limit = XFRM_INF;
2255         xp->lft.soft_packet_limit = XFRM_INF;
2256         xp->lft.hard_packet_limit = XFRM_INF;
2257         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2258                 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2259                 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2260                 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2261                 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2262         }
2263         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2264                 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2265                 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2266                 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2267                 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2268         }
2269         xp->xfrm_nr = 0;
2270         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2271             (err = parse_ipsecrequests(xp, pol)) < 0)
2272                 goto out;
2273
2274         err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2275                                  hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2276
2277         xfrm_audit_policy_add(xp, err ? 0 : 1,
2278                              audit_get_loginuid(current->audit_context), 0);
2279
2280         if (err)
2281                 goto out;
2282
2283         if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2284                 c.event = XFRM_MSG_UPDPOLICY;
2285         else
2286                 c.event = XFRM_MSG_NEWPOLICY;
2287
2288         c.seq = hdr->sadb_msg_seq;
2289         c.pid = hdr->sadb_msg_pid;
2290
2291         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2292         xfrm_pol_put(xp);
2293         return 0;
2294
2295 out:
2296         security_xfrm_policy_free(xp);
2297         kfree(xp);
2298         return err;
2299 }
2300
2301 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2302 {
2303         int err;
2304         struct sadb_address *sa;
2305         struct sadb_x_policy *pol;
2306         struct xfrm_policy *xp, tmp;
2307         struct xfrm_selector sel;
2308         struct km_event c;
2309         struct sadb_x_sec_ctx *sec_ctx;
2310
2311         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2312                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2313             !ext_hdrs[SADB_X_EXT_POLICY-1])
2314                 return -EINVAL;
2315
2316         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2317         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2318                 return -EINVAL;
2319
2320         memset(&sel, 0, sizeof(sel));
2321
2322         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2323         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2324         sel.prefixlen_s = sa->sadb_address_prefixlen;
2325         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2326         sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2327         if (sel.sport)
2328                 sel.sport_mask = htons(0xffff);
2329
2330         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2331         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2332         sel.prefixlen_d = sa->sadb_address_prefixlen;
2333         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2334         sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2335         if (sel.dport)
2336                 sel.dport_mask = htons(0xffff);
2337
2338         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2339         memset(&tmp, 0, sizeof(struct xfrm_policy));
2340
2341         if (sec_ctx != NULL) {
2342                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2343
2344                 if (!uctx)
2345                         return -ENOMEM;
2346
2347                 err = security_xfrm_policy_alloc(&tmp, uctx);
2348                 kfree(uctx);
2349
2350                 if (err)
2351                         return err;
2352         }
2353
2354         xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
2355                                    &sel, tmp.security, 1, &err);
2356         security_xfrm_policy_free(&tmp);
2357
2358         if (xp == NULL)
2359                 return -ENOENT;
2360
2361         xfrm_audit_policy_delete(xp, err ? 0 : 1,
2362                                 audit_get_loginuid(current->audit_context), 0);
2363
2364         if (err)
2365                 goto out;
2366
2367         c.seq = hdr->sadb_msg_seq;
2368         c.pid = hdr->sadb_msg_pid;
2369         c.event = XFRM_MSG_DELPOLICY;
2370         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2371
2372 out:
2373         xfrm_pol_put(xp);
2374         return err;
2375 }
2376
2377 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2378 {
2379         int err;
2380         struct sk_buff *out_skb;
2381         struct sadb_msg *out_hdr;
2382         err = 0;
2383
2384         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2385         if (IS_ERR(out_skb)) {
2386                 err =  PTR_ERR(out_skb);
2387                 goto out;
2388         }
2389         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2390         if (err < 0)
2391                 goto out;
2392
2393         out_hdr = (struct sadb_msg *) out_skb->data;
2394         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2395         out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2396         out_hdr->sadb_msg_satype = 0;
2397         out_hdr->sadb_msg_errno = 0;
2398         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2399         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2400         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2401         err = 0;
2402
2403 out:
2404         return err;
2405 }
2406
2407 #ifdef CONFIG_NET_KEY_MIGRATE
2408 static int pfkey_sockaddr_pair_size(sa_family_t family)
2409 {
2410         switch (family) {
2411         case AF_INET:
2412                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2413 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2414         case AF_INET6:
2415                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2416 #endif
2417         default:
2418                 return 0;
2419         }
2420         /* NOTREACHED */
2421 }
2422
2423 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2424                                xfrm_address_t *saddr, xfrm_address_t *daddr,
2425                                u16 *family)
2426 {
2427         struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2428         if (rq->sadb_x_ipsecrequest_len <
2429             pfkey_sockaddr_pair_size(sa->sa_family))
2430                 return -EINVAL;
2431
2432         switch (sa->sa_family) {
2433         case AF_INET:
2434                 {
2435                         struct sockaddr_in *sin;
2436                         sin = (struct sockaddr_in *)sa;
2437                         if ((sin+1)->sin_family != AF_INET)
2438                                 return -EINVAL;
2439                         memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2440                         sin++;
2441                         memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2442                         *family = AF_INET;
2443                         break;
2444                 }
2445 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2446         case AF_INET6:
2447                 {
2448                         struct sockaddr_in6 *sin6;
2449                         sin6 = (struct sockaddr_in6 *)sa;
2450                         if ((sin6+1)->sin6_family != AF_INET6)
2451                                 return -EINVAL;
2452                         memcpy(&saddr->a6, &sin6->sin6_addr,
2453                                sizeof(saddr->a6));
2454                         sin6++;
2455                         memcpy(&daddr->a6, &sin6->sin6_addr,
2456                                sizeof(daddr->a6));
2457                         *family = AF_INET6;
2458                         break;
2459                 }
2460 #endif
2461         default:
2462                 return -EINVAL;
2463         }
2464
2465         return 0;
2466 }
2467
2468 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2469                                     struct xfrm_migrate *m)
2470 {
2471         int err;
2472         struct sadb_x_ipsecrequest *rq2;
2473         int mode;
2474
2475         if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2476             len < rq1->sadb_x_ipsecrequest_len)
2477                 return -EINVAL;
2478
2479         /* old endoints */
2480         err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2481                                   &m->old_family);
2482         if (err)
2483                 return err;
2484
2485         rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2486         len -= rq1->sadb_x_ipsecrequest_len;
2487
2488         if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2489             len < rq2->sadb_x_ipsecrequest_len)
2490                 return -EINVAL;
2491
2492         /* new endpoints */
2493         err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2494                                   &m->new_family);
2495         if (err)
2496                 return err;
2497
2498         if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2499             rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2500             rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2501                 return -EINVAL;
2502
2503         m->proto = rq1->sadb_x_ipsecrequest_proto;
2504         if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2505                 return -EINVAL;
2506         m->mode = mode;
2507         m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2508
2509         return ((int)(rq1->sadb_x_ipsecrequest_len +
2510                       rq2->sadb_x_ipsecrequest_len));
2511 }
2512
2513 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2514                          struct sadb_msg *hdr, void **ext_hdrs)
2515 {
2516         int i, len, ret, err = -EINVAL;
2517         u8 dir;
2518         struct sadb_address *sa;
2519         struct sadb_x_policy *pol;
2520         struct sadb_x_ipsecrequest *rq;
2521         struct xfrm_selector sel;
2522         struct xfrm_migrate m[XFRM_MAX_DEPTH];
2523
2524         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2525             ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2526             !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2527                 err = -EINVAL;
2528                 goto out;
2529         }
2530
2531         pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2532         if (!pol) {
2533                 err = -EINVAL;
2534                 goto out;
2535         }
2536
2537         if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2538                 err = -EINVAL;
2539                 goto out;
2540         }
2541
2542         dir = pol->sadb_x_policy_dir - 1;
2543         memset(&sel, 0, sizeof(sel));
2544
2545         /* set source address info of selector */
2546         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2547         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2548         sel.prefixlen_s = sa->sadb_address_prefixlen;
2549         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2550         sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2551         if (sel.sport)
2552                 sel.sport_mask = htons(0xffff);
2553
2554         /* set destination address info of selector */
2555         sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2556         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2557         sel.prefixlen_d = sa->sadb_address_prefixlen;
2558         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2559         sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2560         if (sel.dport)
2561                 sel.dport_mask = htons(0xffff);
2562
2563         rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2564
2565         /* extract ipsecrequests */
2566         i = 0;
2567         len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2568
2569         while (len > 0 && i < XFRM_MAX_DEPTH) {
2570                 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2571                 if (ret < 0) {
2572                         err = ret;
2573                         goto out;
2574                 } else {
2575                         rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2576                         len -= ret;
2577                         i++;
2578                 }
2579         }
2580
2581         if (!i || len > 0) {
2582                 err = -EINVAL;
2583                 goto out;
2584         }
2585
2586         return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2587
2588  out:
2589         return err;
2590 }
2591 #else
2592 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2593                          struct sadb_msg *hdr, void **ext_hdrs)
2594 {
2595         return -ENOPROTOOPT;
2596 }
2597 #endif
2598
2599
2600 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2601 {
2602         unsigned int dir;
2603         int err = 0, delete;
2604         struct sadb_x_policy *pol;
2605         struct xfrm_policy *xp;
2606         struct km_event c;
2607
2608         if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2609                 return -EINVAL;
2610
2611         dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2612         if (dir >= XFRM_POLICY_MAX)
2613                 return -EINVAL;
2614
2615         delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2616         xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2617                               delete, &err);
2618         if (xp == NULL)
2619                 return -ENOENT;
2620
2621         if (delete) {
2622                 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2623                                 audit_get_loginuid(current->audit_context), 0);
2624
2625                 if (err)
2626                         goto out;
2627                 c.seq = hdr->sadb_msg_seq;
2628                 c.pid = hdr->sadb_msg_pid;
2629                 c.data.byid = 1;
2630                 c.event = XFRM_MSG_DELPOLICY;
2631                 km_policy_notify(xp, dir, &c);
2632         } else {
2633                 err = key_pol_get_resp(sk, xp, hdr, dir);
2634         }
2635
2636 out:
2637         xfrm_pol_put(xp);
2638         return err;
2639 }
2640
2641 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2642 {
2643         struct pfkey_dump_data *data = ptr;
2644         struct sk_buff *out_skb;
2645         struct sadb_msg *out_hdr;
2646         int err;
2647
2648         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2649         if (IS_ERR(out_skb))
2650                 return PTR_ERR(out_skb);
2651
2652         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2653         if (err < 0)
2654                 return err;
2655
2656         out_hdr = (struct sadb_msg *) out_skb->data;
2657         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2658         out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2659         out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2660         out_hdr->sadb_msg_errno = 0;
2661         out_hdr->sadb_msg_seq = count;
2662         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2663         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2664         return 0;
2665 }
2666
2667 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2668 {
2669         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2670
2671         return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data);
2672 }
2673
2674 static int key_notify_policy_flush(struct km_event *c)
2675 {
2676         struct sk_buff *skb_out;
2677         struct sadb_msg *hdr;
2678
2679         skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2680         if (!skb_out)
2681                 return -ENOBUFS;
2682         hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2683         hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2684         hdr->sadb_msg_seq = c->seq;
2685         hdr->sadb_msg_pid = c->pid;
2686         hdr->sadb_msg_version = PF_KEY_V2;
2687         hdr->sadb_msg_errno = (uint8_t) 0;
2688         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2689         pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2690         return 0;
2691
2692 }
2693
2694 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2695 {
2696         struct km_event c;
2697         struct xfrm_audit audit_info;
2698         int err;
2699
2700         audit_info.loginuid = audit_get_loginuid(current->audit_context);
2701         audit_info.secid = 0;
2702         err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2703         if (err)
2704                 return err;
2705         c.data.type = XFRM_POLICY_TYPE_MAIN;
2706         c.event = XFRM_MSG_FLUSHPOLICY;
2707         c.pid = hdr->sadb_msg_pid;
2708         c.seq = hdr->sadb_msg_seq;
2709         km_policy_notify(NULL, 0, &c);
2710
2711         return 0;
2712 }
2713
2714 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2715                              struct sadb_msg *hdr, void **ext_hdrs);
2716 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2717         [SADB_RESERVED]         = pfkey_reserved,
2718         [SADB_GETSPI]           = pfkey_getspi,
2719         [SADB_UPDATE]           = pfkey_add,
2720         [SADB_ADD]              = pfkey_add,
2721         [SADB_DELETE]           = pfkey_delete,
2722         [SADB_GET]              = pfkey_get,
2723         [SADB_ACQUIRE]          = pfkey_acquire,
2724         [SADB_REGISTER]         = pfkey_register,
2725         [SADB_EXPIRE]           = NULL,
2726         [SADB_FLUSH]            = pfkey_flush,
2727         [SADB_DUMP]             = pfkey_dump,
2728         [SADB_X_PROMISC]        = pfkey_promisc,
2729         [SADB_X_PCHANGE]        = NULL,
2730         [SADB_X_SPDUPDATE]      = pfkey_spdadd,
2731         [SADB_X_SPDADD]         = pfkey_spdadd,
2732         [SADB_X_SPDDELETE]      = pfkey_spddelete,
2733         [SADB_X_SPDGET]         = pfkey_spdget,
2734         [SADB_X_SPDACQUIRE]     = NULL,
2735         [SADB_X_SPDDUMP]        = pfkey_spddump,
2736         [SADB_X_SPDFLUSH]       = pfkey_spdflush,
2737         [SADB_X_SPDSETIDX]      = pfkey_spdadd,
2738         [SADB_X_SPDDELETE2]     = pfkey_spdget,
2739         [SADB_X_MIGRATE]        = pfkey_migrate,
2740 };
2741
2742 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2743 {
2744         void *ext_hdrs[SADB_EXT_MAX];
2745         int err;
2746
2747         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2748                         BROADCAST_PROMISC_ONLY, NULL);
2749
2750         memset(ext_hdrs, 0, sizeof(ext_hdrs));
2751         err = parse_exthdrs(skb, hdr, ext_hdrs);
2752         if (!err) {
2753                 err = -EOPNOTSUPP;
2754                 if (pfkey_funcs[hdr->sadb_msg_type])
2755                         err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2756         }
2757         return err;
2758 }
2759
2760 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2761 {
2762         struct sadb_msg *hdr = NULL;
2763
2764         if (skb->len < sizeof(*hdr)) {
2765                 *errp = -EMSGSIZE;
2766         } else {
2767                 hdr = (struct sadb_msg *) skb->data;
2768                 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2769                     hdr->sadb_msg_reserved != 0 ||
2770                     (hdr->sadb_msg_type <= SADB_RESERVED ||
2771                      hdr->sadb_msg_type > SADB_MAX)) {
2772                         hdr = NULL;
2773                         *errp = -EINVAL;
2774                 } else if (hdr->sadb_msg_len != (skb->len /
2775                                                  sizeof(uint64_t)) ||
2776                            hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2777                                                 sizeof(uint64_t))) {
2778                         hdr = NULL;
2779                         *errp = -EMSGSIZE;
2780                 } else {
2781                         *errp = 0;
2782                 }
2783         }
2784         return hdr;
2785 }
2786
2787 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2788 {
2789         return t->aalgos & (1 << d->desc.sadb_alg_id);
2790 }
2791
2792 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2793 {
2794         return t->ealgos & (1 << d->desc.sadb_alg_id);
2795 }
2796
2797 static int count_ah_combs(struct xfrm_tmpl *t)
2798 {
2799         int i, sz = 0;
2800
2801         for (i = 0; ; i++) {
2802                 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2803                 if (!aalg)
2804                         break;
2805                 if (aalg_tmpl_set(t, aalg) && aalg->available)
2806                         sz += sizeof(struct sadb_comb);
2807         }
2808         return sz + sizeof(struct sadb_prop);
2809 }
2810
2811 static int count_esp_combs(struct xfrm_tmpl *t)
2812 {
2813         int i, k, sz = 0;
2814
2815         for (i = 0; ; i++) {
2816                 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2817                 if (!ealg)
2818                         break;
2819
2820                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2821                         continue;
2822
2823                 for (k = 1; ; k++) {
2824                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2825                         if (!aalg)
2826                                 break;
2827
2828                         if (aalg_tmpl_set(t, aalg) && aalg->available)
2829                                 sz += sizeof(struct sadb_comb);
2830                 }
2831         }
2832         return sz + sizeof(struct sadb_prop);
2833 }
2834
2835 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2836 {
2837         struct sadb_prop *p;
2838         int i;
2839
2840         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2841         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2842         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2843         p->sadb_prop_replay = 32;
2844         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2845
2846         for (i = 0; ; i++) {
2847                 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2848                 if (!aalg)
2849                         break;
2850
2851                 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2852                         struct sadb_comb *c;
2853                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2854                         memset(c, 0, sizeof(*c));
2855                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2856                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2857                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2858                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2859                         c->sadb_comb_hard_addtime = 24*60*60;
2860                         c->sadb_comb_soft_addtime = 20*60*60;
2861                         c->sadb_comb_hard_usetime = 8*60*60;
2862                         c->sadb_comb_soft_usetime = 7*60*60;
2863                 }
2864         }
2865 }
2866
2867 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2868 {
2869         struct sadb_prop *p;
2870         int i, k;
2871
2872         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2873         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2874         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2875         p->sadb_prop_replay = 32;
2876         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2877
2878         for (i=0; ; i++) {
2879                 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2880                 if (!ealg)
2881                         break;
2882
2883                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2884                         continue;
2885
2886                 for (k = 1; ; k++) {
2887                         struct sadb_comb *c;
2888                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2889                         if (!aalg)
2890                                 break;
2891                         if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2892                                 continue;
2893                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2894                         memset(c, 0, sizeof(*c));
2895                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2896                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2897                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2898                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2899                         c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2900                         c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2901                         c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2902                         c->sadb_comb_hard_addtime = 24*60*60;
2903                         c->sadb_comb_soft_addtime = 20*60*60;
2904                         c->sadb_comb_hard_usetime = 8*60*60;
2905                         c->sadb_comb_soft_usetime = 7*60*60;
2906                 }
2907         }
2908 }
2909
2910 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2911 {
2912         return 0;
2913 }
2914
2915 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2916 {
2917         struct sk_buff *out_skb;
2918         struct sadb_msg *out_hdr;
2919         int hard;
2920         int hsc;
2921
2922         hard = c->data.hard;
2923         if (hard)
2924                 hsc = 2;
2925         else
2926                 hsc = 1;
2927
2928         out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
2929         if (IS_ERR(out_skb))
2930                 return PTR_ERR(out_skb);
2931
2932         out_hdr = (struct sadb_msg *) out_skb->data;
2933         out_hdr->sadb_msg_version = PF_KEY_V2;
2934         out_hdr->sadb_msg_type = SADB_EXPIRE;
2935         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2936         out_hdr->sadb_msg_errno = 0;
2937         out_hdr->sadb_msg_reserved = 0;
2938         out_hdr->sadb_msg_seq = 0;
2939         out_hdr->sadb_msg_pid = 0;
2940
2941         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2942         return 0;
2943 }
2944
2945 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2946 {
2947         switch (c->event) {
2948         case XFRM_MSG_EXPIRE:
2949                 return key_notify_sa_expire(x, c);
2950         case XFRM_MSG_DELSA:
2951         case XFRM_MSG_NEWSA:
2952         case XFRM_MSG_UPDSA:
2953                 return key_notify_sa(x, c);
2954         case XFRM_MSG_FLUSHSA:
2955                 return key_notify_sa_flush(c);
2956         case XFRM_MSG_NEWAE: /* not yet supported */
2957                 break;
2958         default:
2959                 printk("pfkey: Unknown SA event %d\n", c->event);
2960                 break;
2961         }
2962
2963         return 0;
2964 }
2965
2966 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2967 {
2968         if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2969                 return 0;
2970
2971         switch (c->event) {
2972         case XFRM_MSG_POLEXPIRE:
2973                 return key_notify_policy_expire(xp, c);
2974         case XFRM_MSG_DELPOLICY:
2975         case XFRM_MSG_NEWPOLICY:
2976         case XFRM_MSG_UPDPOLICY:
2977                 return key_notify_policy(xp, dir, c);
2978         case XFRM_MSG_FLUSHPOLICY:
2979                 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2980                         break;
2981                 return key_notify_policy_flush(c);
2982         default:
2983                 printk("pfkey: Unknown policy event %d\n", c->event);
2984                 break;
2985         }
2986
2987         return 0;
2988 }
2989
2990 static u32 get_acqseq(void)
2991 {
2992         u32 res;
2993         static u32 acqseq;
2994         static DEFINE_SPINLOCK(acqseq_lock);
2995
2996         spin_lock_bh(&acqseq_lock);
2997         res = (++acqseq ? : ++acqseq);
2998         spin_unlock_bh(&acqseq_lock);
2999         return res;
3000 }
3001
3002 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
3003 {
3004         struct sk_buff *skb;
3005         struct sadb_msg *hdr;
3006         struct sadb_address *addr;
3007         struct sadb_x_policy *pol;
3008         struct sockaddr_in *sin;
3009 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3010         struct sockaddr_in6 *sin6;
3011 #endif
3012         int sockaddr_size;
3013         int size;
3014         struct sadb_x_sec_ctx *sec_ctx;
3015         struct xfrm_sec_ctx *xfrm_ctx;
3016         int ctx_size = 0;
3017
3018         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3019         if (!sockaddr_size)
3020                 return -EINVAL;
3021
3022         size = sizeof(struct sadb_msg) +
3023                 (sizeof(struct sadb_address) * 2) +
3024                 (sockaddr_size * 2) +
3025                 sizeof(struct sadb_x_policy);
3026
3027         if (x->id.proto == IPPROTO_AH)
3028                 size += count_ah_combs(t);
3029         else if (x->id.proto == IPPROTO_ESP)
3030                 size += count_esp_combs(t);
3031
3032         if ((xfrm_ctx = x->security)) {
3033                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3034                 size +=  sizeof(struct sadb_x_sec_ctx) + ctx_size;
3035         }
3036
3037         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3038         if (skb == NULL)
3039                 return -ENOMEM;
3040
3041         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3042         hdr->sadb_msg_version = PF_KEY_V2;
3043         hdr->sadb_msg_type = SADB_ACQUIRE;
3044         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3045         hdr->sadb_msg_len = size / sizeof(uint64_t);
3046         hdr->sadb_msg_errno = 0;
3047         hdr->sadb_msg_reserved = 0;
3048         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3049         hdr->sadb_msg_pid = 0;
3050
3051         /* src address */
3052         addr = (struct sadb_address*) skb_put(skb,
3053                                               sizeof(struct sadb_address)+sockaddr_size);
3054         addr->sadb_address_len =
3055                 (sizeof(struct sadb_address)+sockaddr_size)/
3056                         sizeof(uint64_t);
3057         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3058         addr->sadb_address_proto = 0;
3059         addr->sadb_address_reserved = 0;
3060         if (x->props.family == AF_INET) {
3061                 addr->sadb_address_prefixlen = 32;
3062
3063                 sin = (struct sockaddr_in *) (addr + 1);
3064                 sin->sin_family = AF_INET;
3065                 sin->sin_addr.s_addr = x->props.saddr.a4;
3066                 sin->sin_port = 0;
3067                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3068         }
3069 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3070         else if (x->props.family == AF_INET6) {
3071                 addr->sadb_address_prefixlen = 128;
3072
3073                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3074                 sin6->sin6_family = AF_INET6;
3075                 sin6->sin6_port = 0;
3076                 sin6->sin6_flowinfo = 0;
3077                 memcpy(&sin6->sin6_addr,
3078                        x->props.saddr.a6, sizeof(struct in6_addr));
3079                 sin6->sin6_scope_id = 0;
3080         }
3081 #endif
3082         else
3083                 BUG();
3084
3085         /* dst address */
3086         addr = (struct sadb_address*) skb_put(skb,
3087                                               sizeof(struct sadb_address)+sockaddr_size);
3088         addr->sadb_address_len =
3089                 (sizeof(struct sadb_address)+sockaddr_size)/
3090                         sizeof(uint64_t);
3091         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3092         addr->sadb_address_proto = 0;
3093         addr->sadb_address_reserved = 0;
3094         if (x->props.family == AF_INET) {
3095                 addr->sadb_address_prefixlen = 32;
3096
3097                 sin = (struct sockaddr_in *) (addr + 1);
3098                 sin->sin_family = AF_INET;
3099                 sin->sin_addr.s_addr = x->id.daddr.a4;
3100                 sin->sin_port = 0;
3101                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3102         }
3103 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3104         else if (x->props.family == AF_INET6) {
3105                 addr->sadb_address_prefixlen = 128;
3106
3107                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3108                 sin6->sin6_family = AF_INET6;
3109                 sin6->sin6_port = 0;
3110                 sin6->sin6_flowinfo = 0;
3111                 memcpy(&sin6->sin6_addr,
3112                        x->id.daddr.a6, sizeof(struct in6_addr));
3113                 sin6->sin6_scope_id = 0;
3114         }
3115 #endif
3116         else
3117                 BUG();
3118
3119         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
3120         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3121         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3122         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3123         pol->sadb_x_policy_dir = dir+1;
3124         pol->sadb_x_policy_id = xp->index;
3125
3126         /* Set sadb_comb's. */
3127         if (x->id.proto == IPPROTO_AH)
3128                 dump_ah_combs(skb, t);
3129         else if (x->id.proto == IPPROTO_ESP)
3130                 dump_esp_combs(skb, t);
3131
3132         /* security context */
3133         if (xfrm_ctx) {
3134                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3135                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3136                 sec_ctx->sadb_x_sec_len =
3137                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3138                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3139                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3140                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3141                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3142                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3143                        xfrm_ctx->ctx_len);
3144         }
3145
3146         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3147 }
3148
3149 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3150                                                 u8 *data, int len, int *dir)
3151 {
3152         struct xfrm_policy *xp;
3153         struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3154         struct sadb_x_sec_ctx *sec_ctx;
3155
3156         switch (sk->sk_family) {
3157         case AF_INET:
3158                 if (opt != IP_IPSEC_POLICY) {
3159                         *dir = -EOPNOTSUPP;
3160                         return NULL;
3161                 }
3162                 break;
3163 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3164         case AF_INET6:
3165                 if (opt != IPV6_IPSEC_POLICY) {
3166                         *dir = -EOPNOTSUPP;
3167                         return NULL;
3168                 }
3169                 break;
3170 #endif
3171         default:
3172                 *dir = -EINVAL;
3173                 return NULL;
3174         }
3175
3176         *dir = -EINVAL;
3177
3178         if (len < sizeof(struct sadb_x_policy) ||
3179             pol->sadb_x_policy_len*8 > len ||
3180             pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3181             (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3182                 return NULL;
3183
3184         xp = xfrm_policy_alloc(GFP_ATOMIC);
3185         if (xp == NULL) {
3186                 *dir = -ENOBUFS;
3187                 return NULL;
3188         }
3189
3190         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3191                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3192
3193         xp->lft.soft_byte_limit = XFRM_INF;
3194         xp->lft.hard_byte_limit = XFRM_INF;
3195         xp->lft.soft_packet_limit = XFRM_INF;
3196         xp->lft.hard_packet_limit = XFRM_INF;
3197         xp->family = sk->sk_family;
3198
3199         xp->xfrm_nr = 0;
3200         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3201             (*dir = parse_ipsecrequests(xp, pol)) < 0)
3202                 goto out;
3203
3204         /* security context too */
3205         if (len >= (pol->sadb_x_policy_len*8 +
3206             sizeof(struct sadb_x_sec_ctx))) {
3207                 char *p = (char *)pol;
3208                 struct xfrm_user_sec_ctx *uctx;
3209
3210                 p += pol->sadb_x_policy_len*8;
3211                 sec_ctx = (struct sadb_x_sec_ctx *)p;
3212                 if (len < pol->sadb_x_policy_len*8 +
3213                     sec_ctx->sadb_x_sec_len) {
3214                         *dir = -EINVAL;
3215                         goto out;
3216                 }
3217                 if ((*dir = verify_sec_ctx_len(p)))
3218                         goto out;
3219                 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3220                 *dir = security_xfrm_policy_alloc(xp, uctx);
3221                 kfree(uctx);
3222
3223                 if (*dir)
3224                         goto out;
3225         }
3226
3227         *dir = pol->sadb_x_policy_dir-1;
3228         return xp;
3229
3230 out:
3231         security_xfrm_policy_free(xp);
3232         kfree(xp);
3233         return NULL;
3234 }
3235
3236 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3237 {
3238         struct sk_buff *skb;
3239         struct sadb_msg *hdr;
3240         struct sadb_sa *sa;
3241         struct sadb_address *addr;
3242         struct sadb_x_nat_t_port *n_port;
3243         struct sockaddr_in *sin;
3244 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3245         struct sockaddr_in6 *sin6;
3246 #endif
3247         int sockaddr_size;
3248         int size;
3249         __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3250         struct xfrm_encap_tmpl *natt = NULL;
3251
3252         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3253         if (!sockaddr_size)
3254                 return -EINVAL;
3255
3256         if (!satype)
3257                 return -EINVAL;
3258
3259         if (!x->encap)
3260                 return -EINVAL;
3261
3262         natt = x->encap;
3263
3264         /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3265          *
3266          * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3267          * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3268          */
3269
3270         size = sizeof(struct sadb_msg) +
3271                 sizeof(struct sadb_sa) +
3272                 (sizeof(struct sadb_address) * 2) +
3273                 (sockaddr_size * 2) +
3274                 (sizeof(struct sadb_x_nat_t_port) * 2);
3275
3276         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3277         if (skb == NULL)
3278                 return -ENOMEM;
3279
3280         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3281         hdr->sadb_msg_version = PF_KEY_V2;
3282         hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3283         hdr->sadb_msg_satype = satype;
3284         hdr->sadb_msg_len = size / sizeof(uint64_t);
3285         hdr->sadb_msg_errno = 0;
3286         hdr->sadb_msg_reserved = 0;
3287         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3288         hdr->sadb_msg_pid = 0;
3289
3290         /* SA */
3291         sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3292         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3293         sa->sadb_sa_exttype = SADB_EXT_SA;
3294         sa->sadb_sa_spi = x->id.spi;
3295         sa->sadb_sa_replay = 0;
3296         sa->sadb_sa_state = 0;
3297         sa->sadb_sa_auth = 0;
3298         sa->sadb_sa_encrypt = 0;
3299         sa->sadb_sa_flags = 0;
3300
3301         /* ADDRESS_SRC (old addr) */
3302         addr = (struct sadb_address*)
3303                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3304         addr->sadb_address_len =
3305                 (sizeof(struct sadb_address)+sockaddr_size)/
3306                         sizeof(uint64_t);
3307         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3308         addr->sadb_address_proto = 0;
3309         addr->sadb_address_reserved = 0;
3310         if (x->props.family == AF_INET) {
3311                 addr->sadb_address_prefixlen = 32;
3312
3313                 sin = (struct sockaddr_in *) (addr + 1);
3314                 sin->sin_family = AF_INET;
3315                 sin->sin_addr.s_addr = x->props.saddr.a4;
3316                 sin->sin_port = 0;
3317                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3318         }
3319 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3320         else if (x->props.family == AF_INET6) {
3321                 addr->sadb_address_prefixlen = 128;
3322
3323                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3324                 sin6->sin6_family = AF_INET6;
3325                 sin6->sin6_port = 0;
3326                 sin6->sin6_flowinfo = 0;
3327                 memcpy(&sin6->sin6_addr,
3328                        x->props.saddr.a6, sizeof(struct in6_addr));
3329                 sin6->sin6_scope_id = 0;
3330         }
3331 #endif
3332         else
3333                 BUG();
3334
3335         /* NAT_T_SPORT (old port) */
3336         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3337         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3338         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3339         n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3340         n_port->sadb_x_nat_t_port_reserved = 0;
3341
3342         /* ADDRESS_DST (new addr) */
3343         addr = (struct sadb_address*)
3344                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3345         addr->sadb_address_len =
3346                 (sizeof(struct sadb_address)+sockaddr_size)/
3347                         sizeof(uint64_t);
3348         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3349         addr->sadb_address_proto = 0;
3350         addr->sadb_address_reserved = 0;
3351         if (x->props.family == AF_INET) {
3352                 addr->sadb_address_prefixlen = 32;
3353
3354                 sin = (struct sockaddr_in *) (addr + 1);
3355                 sin->sin_family = AF_INET;
3356                 sin->sin_addr.s_addr = ipaddr->a4;
3357                 sin->sin_port = 0;
3358                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3359         }
3360 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3361         else if (x->props.family == AF_INET6) {
3362                 addr->sadb_address_prefixlen = 128;
3363
3364                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3365                 sin6->sin6_family = AF_INET6;
3366                 sin6->sin6_port = 0;
3367                 sin6->sin6_flowinfo = 0;
3368                 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3369                 sin6->sin6_scope_id = 0;
3370         }
3371 #endif
3372         else
3373                 BUG();
3374
3375         /* NAT_T_DPORT (new port) */
3376         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3377         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3378         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3379         n_port->sadb_x_nat_t_port_port = sport;
3380         n_port->sadb_x_nat_t_port_reserved = 0;
3381
3382         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3383 }
3384
3385 #ifdef CONFIG_NET_KEY_MIGRATE
3386 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3387                             struct xfrm_selector *sel)
3388 {
3389         struct sadb_address *addr;
3390         struct sockaddr_in *sin;
3391 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3392         struct sockaddr_in6 *sin6;
3393 #endif
3394         addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3395         addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3396         addr->sadb_address_exttype = type;
3397         addr->sadb_address_proto = sel->proto;
3398         addr->sadb_address_reserved = 0;
3399
3400         switch (type) {
3401         case SADB_EXT_ADDRESS_SRC:
3402                 if (sel->family == AF_INET) {
3403                         addr->sadb_address_prefixlen = sel->prefixlen_s;
3404                         sin = (struct sockaddr_in *)(addr + 1);
3405                         sin->sin_family = AF_INET;
3406                         memcpy(&sin->sin_addr.s_addr, &sel->saddr,
3407                                sizeof(sin->sin_addr.s_addr));
3408                         sin->sin_port = 0;
3409                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3410                 }
3411 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3412                 else if (sel->family == AF_INET6) {
3413                         addr->sadb_address_prefixlen = sel->prefixlen_s;
3414                         sin6 = (struct sockaddr_in6 *)(addr + 1);
3415                         sin6->sin6_family = AF_INET6;
3416                         sin6->sin6_port = 0;
3417                         sin6->sin6_flowinfo = 0;
3418                         sin6->sin6_scope_id = 0;
3419                         memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr,
3420                                sizeof(sin6->sin6_addr.s6_addr));
3421                 }
3422 #endif
3423                 break;
3424         case SADB_EXT_ADDRESS_DST:
3425                 if (sel->family == AF_INET) {
3426                         addr->sadb_address_prefixlen = sel->prefixlen_d;
3427                         sin = (struct sockaddr_in *)(addr + 1);
3428                         sin->sin_family = AF_INET;
3429                         memcpy(&sin->sin_addr.s_addr, &sel->daddr,
3430                                sizeof(sin->sin_addr.s_addr));
3431                         sin->sin_port = 0;
3432                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3433                 }
3434 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3435                 else if (sel->family == AF_INET6) {
3436                         addr->sadb_address_prefixlen = sel->prefixlen_d;
3437                         sin6 = (struct sockaddr_in6 *)(addr + 1);
3438                         sin6->sin6_family = AF_INET6;
3439                         sin6->sin6_port = 0;
3440                         sin6->sin6_flowinfo = 0;
3441                         sin6->sin6_scope_id = 0;
3442                         memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr,
3443                                sizeof(sin6->sin6_addr.s6_addr));
3444                 }
3445 #endif
3446                 break;
3447         default:
3448                 return -EINVAL;
3449         }
3450
3451         return 0;
3452 }
3453
3454 static int set_ipsecrequest(struct sk_buff *skb,
3455                             uint8_t proto, uint8_t mode, int level,
3456                             uint32_t reqid, uint8_t family,
3457                             xfrm_address_t *src, xfrm_address_t *dst)
3458 {
3459         struct sadb_x_ipsecrequest *rq;
3460         struct sockaddr_in *sin;
3461 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3462         struct sockaddr_in6 *sin6;
3463 #endif
3464         int size_req;
3465
3466         size_req = sizeof(struct sadb_x_ipsecrequest) +
3467                    pfkey_sockaddr_pair_size(family);
3468
3469         rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3470         memset(rq, 0, size_req);
3471         rq->sadb_x_ipsecrequest_len = size_req;
3472         rq->sadb_x_ipsecrequest_proto = proto;
3473         rq->sadb_x_ipsecrequest_mode = mode;
3474         rq->sadb_x_ipsecrequest_level = level;
3475         rq->sadb_x_ipsecrequest_reqid = reqid;
3476
3477         switch (family) {
3478         case AF_INET:
3479                 sin = (struct sockaddr_in *)(rq + 1);
3480                 sin->sin_family = AF_INET;
3481                 memcpy(&sin->sin_addr.s_addr, src,
3482                        sizeof(sin->sin_addr.s_addr));
3483                 sin++;
3484                 sin->sin_family = AF_INET;
3485                 memcpy(&sin->sin_addr.s_addr, dst,
3486                        sizeof(sin->sin_addr.s_addr));
3487                 break;
3488 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3489         case AF_INET6:
3490                 sin6 = (struct sockaddr_in6 *)(rq + 1);
3491                 sin6->sin6_family = AF_INET6;
3492                 sin6->sin6_port = 0;
3493                 sin6->sin6_flowinfo = 0;
3494                 sin6->sin6_scope_id = 0;
3495                 memcpy(&sin6->sin6_addr.s6_addr, src,
3496                        sizeof(sin6->sin6_addr.s6_addr));
3497                 sin6++;
3498                 sin6->sin6_family = AF_INET6;
3499                 sin6->sin6_port = 0;
3500                 sin6->sin6_flowinfo = 0;
3501                 sin6->sin6_scope_id = 0;
3502                 memcpy(&sin6->sin6_addr.s6_addr, dst,
3503                        sizeof(sin6->sin6_addr.s6_addr));
3504                 break;
3505 #endif
3506         default:
3507                 return -EINVAL;
3508         }
3509
3510         return 0;
3511 }
3512 #endif
3513
3514 #ifdef CONFIG_NET_KEY_MIGRATE
3515 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3516                               struct xfrm_migrate *m, int num_bundles)
3517 {
3518         int i;
3519         int sasize_sel;
3520         int size = 0;
3521         int size_pol = 0;
3522         struct sk_buff *skb;
3523         struct sadb_msg *hdr;
3524         struct sadb_x_policy *pol;
3525         struct xfrm_migrate *mp;
3526
3527         if (type != XFRM_POLICY_TYPE_MAIN)
3528                 return 0;
3529
3530         if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3531                 return -EINVAL;
3532
3533         /* selector */
3534         sasize_sel = pfkey_sockaddr_size(sel->family);
3535         if (!sasize_sel)
3536                 return -EINVAL;
3537         size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3538
3539         /* policy info */
3540         size_pol += sizeof(struct sadb_x_policy);
3541
3542         /* ipsecrequests */
3543         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3544                 /* old locator pair */
3545                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3546                             pfkey_sockaddr_pair_size(mp->old_family);
3547                 /* new locator pair */
3548                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3549                             pfkey_sockaddr_pair_size(mp->new_family);
3550         }
3551
3552         size += sizeof(struct sadb_msg) + size_pol;
3553
3554         /* alloc buffer */
3555         skb = alloc_skb(size, GFP_ATOMIC);
3556         if (skb == NULL)
3557                 return -ENOMEM;
3558
3559         hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3560         hdr->sadb_msg_version = PF_KEY_V2;
3561         hdr->sadb_msg_type = SADB_X_MIGRATE;
3562         hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3563         hdr->sadb_msg_len = size / 8;
3564         hdr->sadb_msg_errno = 0;
3565         hdr->sadb_msg_reserved = 0;
3566         hdr->sadb_msg_seq = 0;
3567         hdr->sadb_msg_pid = 0;
3568
3569         /* selector src */
3570         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3571
3572         /* selector dst */
3573         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3574
3575         /* policy information */
3576         pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3577         pol->sadb_x_policy_len = size_pol / 8;
3578         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3579         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3580         pol->sadb_x_policy_dir = dir + 1;
3581         pol->sadb_x_policy_id = 0;
3582         pol->sadb_x_policy_priority = 0;
3583
3584         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3585                 /* old ipsecrequest */
3586                 int mode = pfkey_mode_from_xfrm(mp->mode);
3587                 if (mode < 0)
3588                         return -EINVAL;
3589                 if (set_ipsecrequest(skb, mp->proto, mode,
3590                                      (mp->reqid ?  IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3591                                      mp->reqid, mp->old_family,
3592                                      &mp->old_saddr, &mp->old_daddr) < 0) {
3593                         return -EINVAL;
3594                 }
3595
3596                 /* new ipsecrequest */
3597                 if (set_ipsecrequest(skb, mp->proto, mode,
3598                                      (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3599                                      mp->reqid, mp->new_family,
3600                                      &mp->new_saddr, &mp->new_daddr) < 0) {
3601                         return -EINVAL;
3602                 }
3603         }
3604
3605         /* broadcast migrate message to sockets */
3606         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3607
3608         return 0;
3609 }
3610 #else
3611 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3612                               struct xfrm_migrate *m, int num_bundles)
3613 {
3614         return -ENOPROTOOPT;
3615 }
3616 #endif
3617
3618 static int pfkey_sendmsg(struct kiocb *kiocb,
3619                          struct socket *sock, struct msghdr *msg, size_t len)
3620 {
3621         struct sock *sk = sock->sk;
3622         struct sk_buff *skb = NULL;
3623         struct sadb_msg *hdr = NULL;
3624         int err;
3625
3626         err = -EOPNOTSUPP;
3627         if (msg->msg_flags & MSG_OOB)
3628                 goto out;
3629
3630         err = -EMSGSIZE;
3631         if ((unsigned)len > sk->sk_sndbuf - 32)
3632                 goto out;
3633
3634         err = -ENOBUFS;
3635         skb = alloc_skb(len, GFP_KERNEL);
3636         if (skb == NULL)
3637                 goto out;
3638
3639         err = -EFAULT;
3640         if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3641                 goto out;
3642
3643         hdr = pfkey_get_base_msg(skb, &err);
3644         if (!hdr)
3645                 goto out;
3646
3647         mutex_lock(&xfrm_cfg_mutex);
3648         err = pfkey_process(sk, skb, hdr);
3649         mutex_unlock(&xfrm_cfg_mutex);
3650
3651 out:
3652         if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3653                 err = 0;
3654         if (skb)
3655                 kfree_skb(skb);
3656
3657         return err ? : len;
3658 }
3659
3660 static int pfkey_recvmsg(struct kiocb *kiocb,
3661                          struct socket *sock, struct msghdr *msg, size_t len,
3662                          int flags)
3663 {
3664         struct sock *sk = sock->sk;
3665         struct sk_buff *skb;
3666         int copied, err;
3667
3668         err = -EINVAL;
3669         if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3670                 goto out;
3671
3672         msg->msg_namelen = 0;
3673         skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3674         if (skb == NULL)
3675                 goto out;
3676
3677         copied = skb->len;
3678         if (copied > len) {
3679                 msg->msg_flags |= MSG_TRUNC;
3680                 copied = len;
3681         }
3682
3683         skb_reset_transport_header(skb);
3684         err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3685         if (err)
3686                 goto out_free;
3687
3688         sock_recv_timestamp(msg, sk, skb);
3689
3690         err = (flags & MSG_TRUNC) ? skb->len : copied;
3691
3692 out_free:
3693         skb_free_datagram(sk, skb);
3694 out:
3695         return err;
3696 }
3697
3698 static const struct proto_ops pfkey_ops = {
3699         .family         =       PF_KEY,
3700         .owner          =       THIS_MODULE,
3701         /* Operations that make no sense on pfkey sockets. */
3702         .bind           =       sock_no_bind,
3703         .connect        =       sock_no_connect,
3704         .socketpair     =       sock_no_socketpair,
3705         .accept         =       sock_no_accept,
3706         .getname        =       sock_no_getname,
3707         .ioctl          =       sock_no_ioctl,
3708         .listen         =       sock_no_listen,
3709         .shutdown       =       sock_no_shutdown,
3710         .setsockopt     =       sock_no_setsockopt,
3711         .getsockopt     =       sock_no_getsockopt,
3712         .mmap           =       sock_no_mmap,
3713         .sendpage       =       sock_no_sendpage,
3714
3715         /* Now the operations that really occur. */
3716         .release        =       pfkey_release,
3717         .poll           =       datagram_poll,
3718         .sendmsg        =       pfkey_sendmsg,
3719         .recvmsg        =       pfkey_recvmsg,
3720 };
3721
3722 static struct net_proto_family pfkey_family_ops = {
3723         .family =       PF_KEY,
3724         .create =       pfkey_create,
3725         .owner  =       THIS_MODULE,
3726 };
3727
3728 #ifdef CONFIG_PROC_FS
3729 static int pfkey_read_proc(char *buffer, char **start, off_t offset,
3730                            int length, int *eof, void *data)
3731 {
3732         off_t pos = 0;
3733         off_t begin = 0;
3734         int len = 0;
3735         struct sock *s;
3736         struct hlist_node *node;
3737
3738         len += sprintf(buffer,"sk       RefCnt Rmem   Wmem   User   Inode\n");
3739
3740         read_lock(&pfkey_table_lock);
3741
3742         sk_for_each(s, node, &pfkey_table) {
3743                 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
3744                                s,
3745                                atomic_read(&s->sk_refcnt),
3746                                atomic_read(&s->sk_rmem_alloc),
3747                                atomic_read(&s->sk_wmem_alloc),
3748                                sock_i_uid(s),
3749                                sock_i_ino(s)
3750                                );
3751
3752                 buffer[len++] = '\n';
3753
3754                 pos = begin + len;
3755                 if (pos < offset) {
3756                         len = 0;
3757                         begin = pos;
3758                 }
3759                 if(pos > offset + length)
3760                         goto done;
3761         }
3762         *eof = 1;
3763
3764 done:
3765         read_unlock(&pfkey_table_lock);
3766
3767         *start = buffer + (offset - begin);
3768         len -= (offset - begin);
3769
3770         if (len > length)
3771                 len = length;
3772         if (len < 0)
3773                 len = 0;
3774
3775         return len;
3776 }
3777 #endif
3778
3779 static struct xfrm_mgr pfkeyv2_mgr =
3780 {
3781         .id             = "pfkeyv2",
3782         .notify         = pfkey_send_notify,
3783         .acquire        = pfkey_send_acquire,
3784         .compile_policy = pfkey_compile_policy,
3785         .new_mapping    = pfkey_send_new_mapping,
3786         .notify_policy  = pfkey_send_policy_notify,
3787         .migrate        = pfkey_send_migrate,
3788 };
3789
3790 static void __exit ipsec_pfkey_exit(void)
3791 {
3792         xfrm_unregister_km(&pfkeyv2_mgr);
3793         remove_proc_entry("pfkey", init_net.proc_net);
3794         sock_unregister(PF_KEY);
3795         proto_unregister(&key_proto);
3796 }
3797
3798 static int __init ipsec_pfkey_init(void)
3799 {
3800         int err = proto_register(&key_proto, 0);
3801
3802         if (err != 0)
3803                 goto out;
3804
3805         err = sock_register(&pfkey_family_ops);
3806         if (err != 0)
3807                 goto out_unregister_key_proto;
3808 #ifdef CONFIG_PROC_FS
3809         err = -ENOMEM;
3810         if (create_proc_read_entry("pfkey", 0, init_net.proc_net, pfkey_read_proc, NULL) == NULL)
3811                 goto out_sock_unregister;
3812 #endif
3813         err = xfrm_register_km(&pfkeyv2_mgr);
3814         if (err != 0)
3815                 goto out_remove_proc_entry;
3816 out:
3817         return err;
3818 out_remove_proc_entry:
3819 #ifdef CONFIG_PROC_FS
3820         remove_proc_entry("net/pfkey", NULL);
3821 out_sock_unregister:
3822 #endif
3823         sock_unregister(PF_KEY);
3824 out_unregister_key_proto:
3825         proto_unregister(&key_proto);
3826         goto out;
3827 }
3828
3829 module_init(ipsec_pfkey_init);
3830 module_exit(ipsec_pfkey_exit);
3831 MODULE_LICENSE("GPL");
3832 MODULE_ALIAS_NETPROTO(PF_KEY);