[KEY]: Convert net/pfkey to use seq files.
[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         skb = __pfkey_xfrm_state2msg(x, 1, 3);
1019
1020         return skb;
1021 }
1022
1023 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x,
1024                                                           int hsc)
1025 {
1026         return __pfkey_xfrm_state2msg(x, 0, hsc);
1027 }
1028
1029 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1030                                                 void **ext_hdrs)
1031 {
1032         struct xfrm_state *x;
1033         struct sadb_lifetime *lifetime;
1034         struct sadb_sa *sa;
1035         struct sadb_key *key;
1036         struct sadb_x_sec_ctx *sec_ctx;
1037         uint16_t proto;
1038         int err;
1039
1040
1041         sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1042         if (!sa ||
1043             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1044                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1045                 return ERR_PTR(-EINVAL);
1046         if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1047             !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1048                 return ERR_PTR(-EINVAL);
1049         if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1050             !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1051                 return ERR_PTR(-EINVAL);
1052         if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1053             !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1054                 return ERR_PTR(-EINVAL);
1055
1056         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1057         if (proto == 0)
1058                 return ERR_PTR(-EINVAL);
1059
1060         /* default error is no buffer space */
1061         err = -ENOBUFS;
1062
1063         /* RFC2367:
1064
1065    Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1066    SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1067    sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1068    Therefore, the sadb_sa_state field of all submitted SAs MUST be
1069    SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1070    not true.
1071
1072            However, KAME setkey always uses SADB_SASTATE_LARVAL.
1073            Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1074          */
1075         if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1076             (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1077              sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1078             sa->sadb_sa_encrypt > SADB_EALG_MAX)
1079                 return ERR_PTR(-EINVAL);
1080         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1081         if (key != NULL &&
1082             sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1083             ((key->sadb_key_bits+7) / 8 == 0 ||
1084              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1085                 return ERR_PTR(-EINVAL);
1086         key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1087         if (key != NULL &&
1088             sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1089             ((key->sadb_key_bits+7) / 8 == 0 ||
1090              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1091                 return ERR_PTR(-EINVAL);
1092
1093         x = xfrm_state_alloc();
1094         if (x == NULL)
1095                 return ERR_PTR(-ENOBUFS);
1096
1097         x->id.proto = proto;
1098         x->id.spi = sa->sadb_sa_spi;
1099         x->props.replay_window = sa->sadb_sa_replay;
1100         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1101                 x->props.flags |= XFRM_STATE_NOECN;
1102         if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1103                 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1104         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1105                 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1106
1107         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1108         if (lifetime != NULL) {
1109                 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1110                 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1111                 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1112                 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1113         }
1114         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1115         if (lifetime != NULL) {
1116                 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1117                 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1118                 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1119                 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1120         }
1121
1122         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1123         if (sec_ctx != NULL) {
1124                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1125
1126                 if (!uctx)
1127                         goto out;
1128
1129                 err = security_xfrm_state_alloc(x, uctx);
1130                 kfree(uctx);
1131
1132                 if (err)
1133                         goto out;
1134         }
1135
1136         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1137         if (sa->sadb_sa_auth) {
1138                 int keysize = 0;
1139                 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1140                 if (!a) {
1141                         err = -ENOSYS;
1142                         goto out;
1143                 }
1144                 if (key)
1145                         keysize = (key->sadb_key_bits + 7) / 8;
1146                 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1147                 if (!x->aalg)
1148                         goto out;
1149                 strcpy(x->aalg->alg_name, a->name);
1150                 x->aalg->alg_key_len = 0;
1151                 if (key) {
1152                         x->aalg->alg_key_len = key->sadb_key_bits;
1153                         memcpy(x->aalg->alg_key, key+1, keysize);
1154                 }
1155                 x->props.aalgo = sa->sadb_sa_auth;
1156                 /* x->algo.flags = sa->sadb_sa_flags; */
1157         }
1158         if (sa->sadb_sa_encrypt) {
1159                 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1160                         struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1161                         if (!a) {
1162                                 err = -ENOSYS;
1163                                 goto out;
1164                         }
1165                         x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1166                         if (!x->calg)
1167                                 goto out;
1168                         strcpy(x->calg->alg_name, a->name);
1169                         x->props.calgo = sa->sadb_sa_encrypt;
1170                 } else {
1171                         int keysize = 0;
1172                         struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1173                         if (!a) {
1174                                 err = -ENOSYS;
1175                                 goto out;
1176                         }
1177                         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1178                         if (key)
1179                                 keysize = (key->sadb_key_bits + 7) / 8;
1180                         x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1181                         if (!x->ealg)
1182                                 goto out;
1183                         strcpy(x->ealg->alg_name, a->name);
1184                         x->ealg->alg_key_len = 0;
1185                         if (key) {
1186                                 x->ealg->alg_key_len = key->sadb_key_bits;
1187                                 memcpy(x->ealg->alg_key, key+1, keysize);
1188                         }
1189                         x->props.ealgo = sa->sadb_sa_encrypt;
1190                 }
1191         }
1192         /* x->algo.flags = sa->sadb_sa_flags; */
1193
1194         x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1195                                                     &x->props.saddr);
1196         if (!x->props.family) {
1197                 err = -EAFNOSUPPORT;
1198                 goto out;
1199         }
1200         pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1201                                   &x->id.daddr);
1202
1203         if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1204                 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1205                 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1206                 if (mode < 0) {
1207                         err = -EINVAL;
1208                         goto out;
1209                 }
1210                 x->props.mode = mode;
1211                 x->props.reqid = sa2->sadb_x_sa2_reqid;
1212         }
1213
1214         if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1215                 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1216
1217                 /* Nobody uses this, but we try. */
1218                 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1219                 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1220         }
1221
1222         if (!x->sel.family)
1223                 x->sel.family = x->props.family;
1224
1225         if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1226                 struct sadb_x_nat_t_type* n_type;
1227                 struct xfrm_encap_tmpl *natt;
1228
1229                 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1230                 if (!x->encap)
1231                         goto out;
1232
1233                 natt = x->encap;
1234                 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1235                 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1236
1237                 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1238                         struct sadb_x_nat_t_port* n_port =
1239                                 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1240                         natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1241                 }
1242                 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1243                         struct sadb_x_nat_t_port* n_port =
1244                                 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1245                         natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1246                 }
1247         }
1248
1249         err = xfrm_init_state(x);
1250         if (err)
1251                 goto out;
1252
1253         x->km.seq = hdr->sadb_msg_seq;
1254         return x;
1255
1256 out:
1257         x->km.state = XFRM_STATE_DEAD;
1258         xfrm_state_put(x);
1259         return ERR_PTR(err);
1260 }
1261
1262 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1263 {
1264         return -EOPNOTSUPP;
1265 }
1266
1267 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1268 {
1269         struct sk_buff *resp_skb;
1270         struct sadb_x_sa2 *sa2;
1271         struct sadb_address *saddr, *daddr;
1272         struct sadb_msg *out_hdr;
1273         struct sadb_spirange *range;
1274         struct xfrm_state *x = NULL;
1275         int mode;
1276         int err;
1277         u32 min_spi, max_spi;
1278         u32 reqid;
1279         u8 proto;
1280         unsigned short family;
1281         xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1282
1283         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1284                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1285                 return -EINVAL;
1286
1287         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1288         if (proto == 0)
1289                 return -EINVAL;
1290
1291         if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1292                 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1293                 if (mode < 0)
1294                         return -EINVAL;
1295                 reqid = sa2->sadb_x_sa2_reqid;
1296         } else {
1297                 mode = 0;
1298                 reqid = 0;
1299         }
1300
1301         saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1302         daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1303
1304         family = ((struct sockaddr *)(saddr + 1))->sa_family;
1305         switch (family) {
1306         case AF_INET:
1307                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1308                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1309                 break;
1310 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1311         case AF_INET6:
1312                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1313                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1314                 break;
1315 #endif
1316         }
1317
1318         if (hdr->sadb_msg_seq) {
1319                 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1320                 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1321                         xfrm_state_put(x);
1322                         x = NULL;
1323                 }
1324         }
1325
1326         if (!x)
1327                 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1328
1329         if (x == NULL)
1330                 return -ENOENT;
1331
1332         min_spi = 0x100;
1333         max_spi = 0x0fffffff;
1334
1335         range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1336         if (range) {
1337                 min_spi = range->sadb_spirange_min;
1338                 max_spi = range->sadb_spirange_max;
1339         }
1340
1341         err = xfrm_alloc_spi(x, min_spi, max_spi);
1342         resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1343
1344         if (IS_ERR(resp_skb)) {
1345                 xfrm_state_put(x);
1346                 return  PTR_ERR(resp_skb);
1347         }
1348
1349         out_hdr = (struct sadb_msg *) resp_skb->data;
1350         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1351         out_hdr->sadb_msg_type = SADB_GETSPI;
1352         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1353         out_hdr->sadb_msg_errno = 0;
1354         out_hdr->sadb_msg_reserved = 0;
1355         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1356         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1357
1358         xfrm_state_put(x);
1359
1360         pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1361
1362         return 0;
1363 }
1364
1365 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1366 {
1367         struct xfrm_state *x;
1368
1369         if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1370                 return -EOPNOTSUPP;
1371
1372         if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1373                 return 0;
1374
1375         x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1376         if (x == NULL)
1377                 return 0;
1378
1379         spin_lock_bh(&x->lock);
1380         if (x->km.state == XFRM_STATE_ACQ) {
1381                 x->km.state = XFRM_STATE_ERROR;
1382                 wake_up(&km_waitq);
1383         }
1384         spin_unlock_bh(&x->lock);
1385         xfrm_state_put(x);
1386         return 0;
1387 }
1388
1389 static inline int event2poltype(int event)
1390 {
1391         switch (event) {
1392         case XFRM_MSG_DELPOLICY:
1393                 return SADB_X_SPDDELETE;
1394         case XFRM_MSG_NEWPOLICY:
1395                 return SADB_X_SPDADD;
1396         case XFRM_MSG_UPDPOLICY:
1397                 return SADB_X_SPDUPDATE;
1398         case XFRM_MSG_POLEXPIRE:
1399         //      return SADB_X_SPDEXPIRE;
1400         default:
1401                 printk("pfkey: Unknown policy event %d\n", event);
1402                 break;
1403         }
1404
1405         return 0;
1406 }
1407
1408 static inline int event2keytype(int event)
1409 {
1410         switch (event) {
1411         case XFRM_MSG_DELSA:
1412                 return SADB_DELETE;
1413         case XFRM_MSG_NEWSA:
1414                 return SADB_ADD;
1415         case XFRM_MSG_UPDSA:
1416                 return SADB_UPDATE;
1417         case XFRM_MSG_EXPIRE:
1418                 return SADB_EXPIRE;
1419         default:
1420                 printk("pfkey: Unknown SA event %d\n", event);
1421                 break;
1422         }
1423
1424         return 0;
1425 }
1426
1427 /* ADD/UPD/DEL */
1428 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1429 {
1430         struct sk_buff *skb;
1431         struct sadb_msg *hdr;
1432
1433         skb = pfkey_xfrm_state2msg(x);
1434
1435         if (IS_ERR(skb))
1436                 return PTR_ERR(skb);
1437
1438         hdr = (struct sadb_msg *) skb->data;
1439         hdr->sadb_msg_version = PF_KEY_V2;
1440         hdr->sadb_msg_type = event2keytype(c->event);
1441         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1442         hdr->sadb_msg_errno = 0;
1443         hdr->sadb_msg_reserved = 0;
1444         hdr->sadb_msg_seq = c->seq;
1445         hdr->sadb_msg_pid = c->pid;
1446
1447         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1448
1449         return 0;
1450 }
1451
1452 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1453 {
1454         struct xfrm_state *x;
1455         int err;
1456         struct km_event c;
1457
1458         x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1459         if (IS_ERR(x))
1460                 return PTR_ERR(x);
1461
1462         xfrm_state_hold(x);
1463         if (hdr->sadb_msg_type == SADB_ADD)
1464                 err = xfrm_state_add(x);
1465         else
1466                 err = xfrm_state_update(x);
1467
1468         xfrm_audit_state_add(x, err ? 0 : 1,
1469                              audit_get_loginuid(current), 0);
1470
1471         if (err < 0) {
1472                 x->km.state = XFRM_STATE_DEAD;
1473                 __xfrm_state_put(x);
1474                 goto out;
1475         }
1476
1477         if (hdr->sadb_msg_type == SADB_ADD)
1478                 c.event = XFRM_MSG_NEWSA;
1479         else
1480                 c.event = XFRM_MSG_UPDSA;
1481         c.seq = hdr->sadb_msg_seq;
1482         c.pid = hdr->sadb_msg_pid;
1483         km_state_notify(x, &c);
1484 out:
1485         xfrm_state_put(x);
1486         return err;
1487 }
1488
1489 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1490 {
1491         struct xfrm_state *x;
1492         struct km_event c;
1493         int err;
1494
1495         if (!ext_hdrs[SADB_EXT_SA-1] ||
1496             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1497                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1498                 return -EINVAL;
1499
1500         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1501         if (x == NULL)
1502                 return -ESRCH;
1503
1504         if ((err = security_xfrm_state_delete(x)))
1505                 goto out;
1506
1507         if (xfrm_state_kern(x)) {
1508                 err = -EPERM;
1509                 goto out;
1510         }
1511
1512         err = xfrm_state_delete(x);
1513
1514         if (err < 0)
1515                 goto out;
1516
1517         c.seq = hdr->sadb_msg_seq;
1518         c.pid = hdr->sadb_msg_pid;
1519         c.event = XFRM_MSG_DELSA;
1520         km_state_notify(x, &c);
1521 out:
1522         xfrm_audit_state_delete(x, err ? 0 : 1,
1523                                audit_get_loginuid(current), 0);
1524         xfrm_state_put(x);
1525
1526         return err;
1527 }
1528
1529 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1530 {
1531         __u8 proto;
1532         struct sk_buff *out_skb;
1533         struct sadb_msg *out_hdr;
1534         struct xfrm_state *x;
1535
1536         if (!ext_hdrs[SADB_EXT_SA-1] ||
1537             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1538                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1539                 return -EINVAL;
1540
1541         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1542         if (x == NULL)
1543                 return -ESRCH;
1544
1545         out_skb = pfkey_xfrm_state2msg(x);
1546         proto = x->id.proto;
1547         xfrm_state_put(x);
1548         if (IS_ERR(out_skb))
1549                 return  PTR_ERR(out_skb);
1550
1551         out_hdr = (struct sadb_msg *) out_skb->data;
1552         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1553         out_hdr->sadb_msg_type = SADB_GET;
1554         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1555         out_hdr->sadb_msg_errno = 0;
1556         out_hdr->sadb_msg_reserved = 0;
1557         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1558         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1559         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1560
1561         return 0;
1562 }
1563
1564 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1565                                               gfp_t allocation)
1566 {
1567         struct sk_buff *skb;
1568         struct sadb_msg *hdr;
1569         int len, auth_len, enc_len, i;
1570
1571         auth_len = xfrm_count_auth_supported();
1572         if (auth_len) {
1573                 auth_len *= sizeof(struct sadb_alg);
1574                 auth_len += sizeof(struct sadb_supported);
1575         }
1576
1577         enc_len = xfrm_count_enc_supported();
1578         if (enc_len) {
1579                 enc_len *= sizeof(struct sadb_alg);
1580                 enc_len += sizeof(struct sadb_supported);
1581         }
1582
1583         len = enc_len + auth_len + sizeof(struct sadb_msg);
1584
1585         skb = alloc_skb(len + 16, allocation);
1586         if (!skb)
1587                 goto out_put_algs;
1588
1589         hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1590         pfkey_hdr_dup(hdr, orig);
1591         hdr->sadb_msg_errno = 0;
1592         hdr->sadb_msg_len = len / sizeof(uint64_t);
1593
1594         if (auth_len) {
1595                 struct sadb_supported *sp;
1596                 struct sadb_alg *ap;
1597
1598                 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1599                 ap = (struct sadb_alg *) (sp + 1);
1600
1601                 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1602                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1603
1604                 for (i = 0; ; i++) {
1605                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1606                         if (!aalg)
1607                                 break;
1608                         if (aalg->available)
1609                                 *ap++ = aalg->desc;
1610                 }
1611         }
1612
1613         if (enc_len) {
1614                 struct sadb_supported *sp;
1615                 struct sadb_alg *ap;
1616
1617                 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1618                 ap = (struct sadb_alg *) (sp + 1);
1619
1620                 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1621                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1622
1623                 for (i = 0; ; i++) {
1624                         struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1625                         if (!ealg)
1626                                 break;
1627                         if (ealg->available)
1628                                 *ap++ = ealg->desc;
1629                 }
1630         }
1631
1632 out_put_algs:
1633         return skb;
1634 }
1635
1636 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1637 {
1638         struct pfkey_sock *pfk = pfkey_sk(sk);
1639         struct sk_buff *supp_skb;
1640
1641         if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1642                 return -EINVAL;
1643
1644         if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1645                 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1646                         return -EEXIST;
1647                 pfk->registered |= (1<<hdr->sadb_msg_satype);
1648         }
1649
1650         xfrm_probe_algs();
1651
1652         supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1653         if (!supp_skb) {
1654                 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1655                         pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1656
1657                 return -ENOBUFS;
1658         }
1659
1660         pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1661
1662         return 0;
1663 }
1664
1665 static int key_notify_sa_flush(struct km_event *c)
1666 {
1667         struct sk_buff *skb;
1668         struct sadb_msg *hdr;
1669
1670         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1671         if (!skb)
1672                 return -ENOBUFS;
1673         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1674         hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1675         hdr->sadb_msg_type = SADB_FLUSH;
1676         hdr->sadb_msg_seq = c->seq;
1677         hdr->sadb_msg_pid = c->pid;
1678         hdr->sadb_msg_version = PF_KEY_V2;
1679         hdr->sadb_msg_errno = (uint8_t) 0;
1680         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1681
1682         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1683
1684         return 0;
1685 }
1686
1687 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1688 {
1689         unsigned proto;
1690         struct km_event c;
1691         struct xfrm_audit audit_info;
1692         int err;
1693
1694         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1695         if (proto == 0)
1696                 return -EINVAL;
1697
1698         audit_info.loginuid = audit_get_loginuid(current);
1699         audit_info.secid = 0;
1700         err = xfrm_state_flush(proto, &audit_info);
1701         if (err)
1702                 return err;
1703         c.data.proto = proto;
1704         c.seq = hdr->sadb_msg_seq;
1705         c.pid = hdr->sadb_msg_pid;
1706         c.event = XFRM_MSG_FLUSHSA;
1707         km_state_notify(NULL, &c);
1708
1709         return 0;
1710 }
1711
1712 struct pfkey_dump_data
1713 {
1714         struct sk_buff *skb;
1715         struct sadb_msg *hdr;
1716         struct sock *sk;
1717 };
1718
1719 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1720 {
1721         struct pfkey_dump_data *data = ptr;
1722         struct sk_buff *out_skb;
1723         struct sadb_msg *out_hdr;
1724
1725         out_skb = pfkey_xfrm_state2msg(x);
1726         if (IS_ERR(out_skb))
1727                 return PTR_ERR(out_skb);
1728
1729         out_hdr = (struct sadb_msg *) out_skb->data;
1730         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1731         out_hdr->sadb_msg_type = SADB_DUMP;
1732         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1733         out_hdr->sadb_msg_errno = 0;
1734         out_hdr->sadb_msg_reserved = 0;
1735         out_hdr->sadb_msg_seq = count;
1736         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1737         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1738         return 0;
1739 }
1740
1741 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1742 {
1743         u8 proto;
1744         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1745
1746         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1747         if (proto == 0)
1748                 return -EINVAL;
1749
1750         return xfrm_state_walk(proto, dump_sa, &data);
1751 }
1752
1753 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1754 {
1755         struct pfkey_sock *pfk = pfkey_sk(sk);
1756         int satype = hdr->sadb_msg_satype;
1757
1758         if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1759                 /* XXX we mangle packet... */
1760                 hdr->sadb_msg_errno = 0;
1761                 if (satype != 0 && satype != 1)
1762                         return -EINVAL;
1763                 pfk->promisc = satype;
1764         }
1765         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1766         return 0;
1767 }
1768
1769 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1770 {
1771         int i;
1772         u32 reqid = *(u32*)ptr;
1773
1774         for (i=0; i<xp->xfrm_nr; i++) {
1775                 if (xp->xfrm_vec[i].reqid == reqid)
1776                         return -EEXIST;
1777         }
1778         return 0;
1779 }
1780
1781 static u32 gen_reqid(void)
1782 {
1783         u32 start;
1784         static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1785
1786         start = reqid;
1787         do {
1788                 ++reqid;
1789                 if (reqid == 0)
1790                         reqid = IPSEC_MANUAL_REQID_MAX+1;
1791                 if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid,
1792                                      (void*)&reqid) != -EEXIST)
1793                         return reqid;
1794         } while (reqid != start);
1795         return 0;
1796 }
1797
1798 static int
1799 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1800 {
1801         struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1802         struct sockaddr_in *sin;
1803 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1804         struct sockaddr_in6 *sin6;
1805 #endif
1806         int mode;
1807
1808         if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1809                 return -ELOOP;
1810
1811         if (rq->sadb_x_ipsecrequest_mode == 0)
1812                 return -EINVAL;
1813
1814         t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1815         if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1816                 return -EINVAL;
1817         t->mode = mode;
1818         if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1819                 t->optional = 1;
1820         else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1821                 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1822                 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1823                         t->reqid = 0;
1824                 if (!t->reqid && !(t->reqid = gen_reqid()))
1825                         return -ENOBUFS;
1826         }
1827
1828         /* addresses present only in tunnel mode */
1829         if (t->mode == XFRM_MODE_TUNNEL) {
1830                 struct sockaddr *sa;
1831                 sa = (struct sockaddr *)(rq+1);
1832                 switch(sa->sa_family) {
1833                 case AF_INET:
1834                         sin = (struct sockaddr_in*)sa;
1835                         t->saddr.a4 = sin->sin_addr.s_addr;
1836                         sin++;
1837                         if (sin->sin_family != AF_INET)
1838                                 return -EINVAL;
1839                         t->id.daddr.a4 = sin->sin_addr.s_addr;
1840                         break;
1841 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1842                 case AF_INET6:
1843                         sin6 = (struct sockaddr_in6*)sa;
1844                         memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1845                         sin6++;
1846                         if (sin6->sin6_family != AF_INET6)
1847                                 return -EINVAL;
1848                         memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1849                         break;
1850 #endif
1851                 default:
1852                         return -EINVAL;
1853                 }
1854                 t->encap_family = sa->sa_family;
1855         } else
1856                 t->encap_family = xp->family;
1857
1858         /* No way to set this via kame pfkey */
1859         t->aalgos = t->ealgos = t->calgos = ~0;
1860         xp->xfrm_nr++;
1861         return 0;
1862 }
1863
1864 static int
1865 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1866 {
1867         int err;
1868         int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1869         struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1870
1871         while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1872                 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1873                         return err;
1874                 len -= rq->sadb_x_ipsecrequest_len;
1875                 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1876         }
1877         return 0;
1878 }
1879
1880 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1881 {
1882   struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1883
1884         if (xfrm_ctx) {
1885                 int len = sizeof(struct sadb_x_sec_ctx);
1886                 len += xfrm_ctx->ctx_len;
1887                 return PFKEY_ALIGN8(len);
1888         }
1889         return 0;
1890 }
1891
1892 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1893 {
1894         struct xfrm_tmpl *t;
1895         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1896         int socklen = 0;
1897         int i;
1898
1899         for (i=0; i<xp->xfrm_nr; i++) {
1900                 t = xp->xfrm_vec + i;
1901                 socklen += (t->encap_family == AF_INET ?
1902                             sizeof(struct sockaddr_in) :
1903                             sizeof(struct sockaddr_in6));
1904         }
1905
1906         return sizeof(struct sadb_msg) +
1907                 (sizeof(struct sadb_lifetime) * 3) +
1908                 (sizeof(struct sadb_address) * 2) +
1909                 (sockaddr_size * 2) +
1910                 sizeof(struct sadb_x_policy) +
1911                 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1912                 (socklen * 2) +
1913                 pfkey_xfrm_policy2sec_ctx_size(xp);
1914 }
1915
1916 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1917 {
1918         struct sk_buff *skb;
1919         int size;
1920
1921         size = pfkey_xfrm_policy2msg_size(xp);
1922
1923         skb =  alloc_skb(size + 16, GFP_ATOMIC);
1924         if (skb == NULL)
1925                 return ERR_PTR(-ENOBUFS);
1926
1927         return skb;
1928 }
1929
1930 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1931 {
1932         struct sadb_msg *hdr;
1933         struct sadb_address *addr;
1934         struct sadb_lifetime *lifetime;
1935         struct sadb_x_policy *pol;
1936         struct sockaddr_in   *sin;
1937         struct sadb_x_sec_ctx *sec_ctx;
1938         struct xfrm_sec_ctx *xfrm_ctx;
1939 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1940         struct sockaddr_in6  *sin6;
1941 #endif
1942         int i;
1943         int size;
1944         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1945         int socklen = (xp->family == AF_INET ?
1946                        sizeof(struct sockaddr_in) :
1947                        sizeof(struct sockaddr_in6));
1948
1949         size = pfkey_xfrm_policy2msg_size(xp);
1950
1951         /* call should fill header later */
1952         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1953         memset(hdr, 0, size);   /* XXX do we need this ? */
1954
1955         /* src address */
1956         addr = (struct sadb_address*) skb_put(skb,
1957                                               sizeof(struct sadb_address)+sockaddr_size);
1958         addr->sadb_address_len =
1959                 (sizeof(struct sadb_address)+sockaddr_size)/
1960                         sizeof(uint64_t);
1961         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1962         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1963         addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1964         addr->sadb_address_reserved = 0;
1965         /* src address */
1966         if (xp->family == AF_INET) {
1967                 sin = (struct sockaddr_in *) (addr + 1);
1968                 sin->sin_family = AF_INET;
1969                 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1970                 sin->sin_port = xp->selector.sport;
1971                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1972         }
1973 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1974         else if (xp->family == AF_INET6) {
1975                 sin6 = (struct sockaddr_in6 *) (addr + 1);
1976                 sin6->sin6_family = AF_INET6;
1977                 sin6->sin6_port = xp->selector.sport;
1978                 sin6->sin6_flowinfo = 0;
1979                 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1980                        sizeof(struct in6_addr));
1981                 sin6->sin6_scope_id = 0;
1982         }
1983 #endif
1984         else
1985                 BUG();
1986
1987         /* dst address */
1988         addr = (struct sadb_address*) skb_put(skb,
1989                                               sizeof(struct sadb_address)+sockaddr_size);
1990         addr->sadb_address_len =
1991                 (sizeof(struct sadb_address)+sockaddr_size)/
1992                         sizeof(uint64_t);
1993         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1994         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1995         addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1996         addr->sadb_address_reserved = 0;
1997         if (xp->family == AF_INET) {
1998                 sin = (struct sockaddr_in *) (addr + 1);
1999                 sin->sin_family = AF_INET;
2000                 sin->sin_addr.s_addr = xp->selector.daddr.a4;
2001                 sin->sin_port = xp->selector.dport;
2002                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2003         }
2004 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2005         else if (xp->family == AF_INET6) {
2006                 sin6 = (struct sockaddr_in6 *) (addr + 1);
2007                 sin6->sin6_family = AF_INET6;
2008                 sin6->sin6_port = xp->selector.dport;
2009                 sin6->sin6_flowinfo = 0;
2010                 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2011                        sizeof(struct in6_addr));
2012                 sin6->sin6_scope_id = 0;
2013         }
2014 #endif
2015         else
2016                 BUG();
2017
2018         /* hard time */
2019         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2020                                                      sizeof(struct sadb_lifetime));
2021         lifetime->sadb_lifetime_len =
2022                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2023         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2024         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.hard_packet_limit);
2025         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2026         lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2027         lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2028         /* soft time */
2029         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2030                                                      sizeof(struct sadb_lifetime));
2031         lifetime->sadb_lifetime_len =
2032                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2033         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2034         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.soft_packet_limit);
2035         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2036         lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2037         lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2038         /* current time */
2039         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2040                                                      sizeof(struct sadb_lifetime));
2041         lifetime->sadb_lifetime_len =
2042                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2043         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2044         lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2045         lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2046         lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2047         lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2048
2049         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
2050         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2051         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2052         pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2053         if (xp->action == XFRM_POLICY_ALLOW) {
2054                 if (xp->xfrm_nr)
2055                         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2056                 else
2057                         pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2058         }
2059         pol->sadb_x_policy_dir = dir+1;
2060         pol->sadb_x_policy_id = xp->index;
2061         pol->sadb_x_policy_priority = xp->priority;
2062
2063         for (i=0; i<xp->xfrm_nr; i++) {
2064                 struct sadb_x_ipsecrequest *rq;
2065                 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2066                 int req_size;
2067                 int mode;
2068
2069                 req_size = sizeof(struct sadb_x_ipsecrequest);
2070                 if (t->mode == XFRM_MODE_TUNNEL)
2071                         req_size += ((t->encap_family == AF_INET ?
2072                                      sizeof(struct sockaddr_in) :
2073                                      sizeof(struct sockaddr_in6)) * 2);
2074                 else
2075                         size -= 2*socklen;
2076                 rq = (void*)skb_put(skb, req_size);
2077                 pol->sadb_x_policy_len += req_size/8;
2078                 memset(rq, 0, sizeof(*rq));
2079                 rq->sadb_x_ipsecrequest_len = req_size;
2080                 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2081                 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2082                         return -EINVAL;
2083                 rq->sadb_x_ipsecrequest_mode = mode;
2084                 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2085                 if (t->reqid)
2086                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2087                 if (t->optional)
2088                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2089                 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2090                 if (t->mode == XFRM_MODE_TUNNEL) {
2091                         switch (t->encap_family) {
2092                         case AF_INET:
2093                                 sin = (void*)(rq+1);
2094                                 sin->sin_family = AF_INET;
2095                                 sin->sin_addr.s_addr = t->saddr.a4;
2096                                 sin->sin_port = 0;
2097                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2098                                 sin++;
2099                                 sin->sin_family = AF_INET;
2100                                 sin->sin_addr.s_addr = t->id.daddr.a4;
2101                                 sin->sin_port = 0;
2102                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2103                                 break;
2104 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2105                         case AF_INET6:
2106                                 sin6 = (void*)(rq+1);
2107                                 sin6->sin6_family = AF_INET6;
2108                                 sin6->sin6_port = 0;
2109                                 sin6->sin6_flowinfo = 0;
2110                                 memcpy(&sin6->sin6_addr, t->saddr.a6,
2111                                        sizeof(struct in6_addr));
2112                                 sin6->sin6_scope_id = 0;
2113
2114                                 sin6++;
2115                                 sin6->sin6_family = AF_INET6;
2116                                 sin6->sin6_port = 0;
2117                                 sin6->sin6_flowinfo = 0;
2118                                 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2119                                        sizeof(struct in6_addr));
2120                                 sin6->sin6_scope_id = 0;
2121                                 break;
2122 #endif
2123                         default:
2124                                 break;
2125                         }
2126                 }
2127         }
2128
2129         /* security context */
2130         if ((xfrm_ctx = xp->security)) {
2131                 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2132
2133                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2134                 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2135                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2136                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2137                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2138                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2139                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2140                        xfrm_ctx->ctx_len);
2141         }
2142
2143         hdr->sadb_msg_len = size / sizeof(uint64_t);
2144         hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2145
2146         return 0;
2147 }
2148
2149 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2150 {
2151         struct sk_buff *out_skb;
2152         struct sadb_msg *out_hdr;
2153         int err;
2154
2155         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2156         if (IS_ERR(out_skb)) {
2157                 err = PTR_ERR(out_skb);
2158                 goto out;
2159         }
2160         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2161         if (err < 0)
2162                 return err;
2163
2164         out_hdr = (struct sadb_msg *) out_skb->data;
2165         out_hdr->sadb_msg_version = PF_KEY_V2;
2166
2167         if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2168                 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2169         else
2170                 out_hdr->sadb_msg_type = event2poltype(c->event);
2171         out_hdr->sadb_msg_errno = 0;
2172         out_hdr->sadb_msg_seq = c->seq;
2173         out_hdr->sadb_msg_pid = c->pid;
2174         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2175 out:
2176         return 0;
2177
2178 }
2179
2180 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2181 {
2182         int err = 0;
2183         struct sadb_lifetime *lifetime;
2184         struct sadb_address *sa;
2185         struct sadb_x_policy *pol;
2186         struct xfrm_policy *xp;
2187         struct km_event c;
2188         struct sadb_x_sec_ctx *sec_ctx;
2189
2190         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2191                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2192             !ext_hdrs[SADB_X_EXT_POLICY-1])
2193                 return -EINVAL;
2194
2195         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2196         if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2197                 return -EINVAL;
2198         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2199                 return -EINVAL;
2200
2201         xp = xfrm_policy_alloc(GFP_KERNEL);
2202         if (xp == NULL)
2203                 return -ENOBUFS;
2204
2205         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2206                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2207         xp->priority = pol->sadb_x_policy_priority;
2208
2209         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2210         xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2211         if (!xp->family) {
2212                 err = -EINVAL;
2213                 goto out;
2214         }
2215         xp->selector.family = xp->family;
2216         xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2217         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2218         xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2219         if (xp->selector.sport)
2220                 xp->selector.sport_mask = htons(0xffff);
2221
2222         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2223         pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2224         xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2225
2226         /* Amusing, we set this twice.  KAME apps appear to set same value
2227          * in both addresses.
2228          */
2229         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2230
2231         xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2232         if (xp->selector.dport)
2233                 xp->selector.dport_mask = htons(0xffff);
2234
2235         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2236         if (sec_ctx != NULL) {
2237                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2238
2239                 if (!uctx) {
2240                         err = -ENOBUFS;
2241                         goto out;
2242                 }
2243
2244                 err = security_xfrm_policy_alloc(xp, uctx);
2245                 kfree(uctx);
2246
2247                 if (err)
2248                         goto out;
2249         }
2250
2251         xp->lft.soft_byte_limit = XFRM_INF;
2252         xp->lft.hard_byte_limit = XFRM_INF;
2253         xp->lft.soft_packet_limit = XFRM_INF;
2254         xp->lft.hard_packet_limit = XFRM_INF;
2255         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2256                 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2257                 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2258                 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2259                 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2260         }
2261         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2262                 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2263                 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2264                 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2265                 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2266         }
2267         xp->xfrm_nr = 0;
2268         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2269             (err = parse_ipsecrequests(xp, pol)) < 0)
2270                 goto out;
2271
2272         err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2273                                  hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2274
2275         xfrm_audit_policy_add(xp, err ? 0 : 1,
2276                              audit_get_loginuid(current), 0);
2277
2278         if (err)
2279                 goto out;
2280
2281         if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2282                 c.event = XFRM_MSG_UPDPOLICY;
2283         else
2284                 c.event = XFRM_MSG_NEWPOLICY;
2285
2286         c.seq = hdr->sadb_msg_seq;
2287         c.pid = hdr->sadb_msg_pid;
2288
2289         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2290         xfrm_pol_put(xp);
2291         return 0;
2292
2293 out:
2294         xfrm_policy_destroy(xp);
2295         return err;
2296 }
2297
2298 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2299 {
2300         int err;
2301         struct sadb_address *sa;
2302         struct sadb_x_policy *pol;
2303         struct xfrm_policy *xp, tmp;
2304         struct xfrm_selector sel;
2305         struct km_event c;
2306         struct sadb_x_sec_ctx *sec_ctx;
2307
2308         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2309                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2310             !ext_hdrs[SADB_X_EXT_POLICY-1])
2311                 return -EINVAL;
2312
2313         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2314         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2315                 return -EINVAL;
2316
2317         memset(&sel, 0, sizeof(sel));
2318
2319         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2320         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2321         sel.prefixlen_s = sa->sadb_address_prefixlen;
2322         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2323         sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2324         if (sel.sport)
2325                 sel.sport_mask = htons(0xffff);
2326
2327         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2328         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2329         sel.prefixlen_d = sa->sadb_address_prefixlen;
2330         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2331         sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2332         if (sel.dport)
2333                 sel.dport_mask = htons(0xffff);
2334
2335         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2336         memset(&tmp, 0, sizeof(struct xfrm_policy));
2337
2338         if (sec_ctx != NULL) {
2339                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2340
2341                 if (!uctx)
2342                         return -ENOMEM;
2343
2344                 err = security_xfrm_policy_alloc(&tmp, uctx);
2345                 kfree(uctx);
2346
2347                 if (err)
2348                         return err;
2349         }
2350
2351         xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
2352                                    &sel, tmp.security, 1, &err);
2353         security_xfrm_policy_free(&tmp);
2354
2355         if (xp == NULL)
2356                 return -ENOENT;
2357
2358         xfrm_audit_policy_delete(xp, err ? 0 : 1,
2359                                 audit_get_loginuid(current), 0);
2360
2361         if (err)
2362                 goto out;
2363
2364         c.seq = hdr->sadb_msg_seq;
2365         c.pid = hdr->sadb_msg_pid;
2366         c.event = XFRM_MSG_DELPOLICY;
2367         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2368
2369 out:
2370         xfrm_pol_put(xp);
2371         return err;
2372 }
2373
2374 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2375 {
2376         int err;
2377         struct sk_buff *out_skb;
2378         struct sadb_msg *out_hdr;
2379         err = 0;
2380
2381         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2382         if (IS_ERR(out_skb)) {
2383                 err =  PTR_ERR(out_skb);
2384                 goto out;
2385         }
2386         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2387         if (err < 0)
2388                 goto out;
2389
2390         out_hdr = (struct sadb_msg *) out_skb->data;
2391         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2392         out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2393         out_hdr->sadb_msg_satype = 0;
2394         out_hdr->sadb_msg_errno = 0;
2395         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2396         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2397         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2398         err = 0;
2399
2400 out:
2401         return err;
2402 }
2403
2404 #ifdef CONFIG_NET_KEY_MIGRATE
2405 static int pfkey_sockaddr_pair_size(sa_family_t family)
2406 {
2407         switch (family) {
2408         case AF_INET:
2409                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2410 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2411         case AF_INET6:
2412                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2413 #endif
2414         default:
2415                 return 0;
2416         }
2417         /* NOTREACHED */
2418 }
2419
2420 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2421                                xfrm_address_t *saddr, xfrm_address_t *daddr,
2422                                u16 *family)
2423 {
2424         struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2425         if (rq->sadb_x_ipsecrequest_len <
2426             pfkey_sockaddr_pair_size(sa->sa_family))
2427                 return -EINVAL;
2428
2429         switch (sa->sa_family) {
2430         case AF_INET:
2431                 {
2432                         struct sockaddr_in *sin;
2433                         sin = (struct sockaddr_in *)sa;
2434                         if ((sin+1)->sin_family != AF_INET)
2435                                 return -EINVAL;
2436                         memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2437                         sin++;
2438                         memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2439                         *family = AF_INET;
2440                         break;
2441                 }
2442 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2443         case AF_INET6:
2444                 {
2445                         struct sockaddr_in6 *sin6;
2446                         sin6 = (struct sockaddr_in6 *)sa;
2447                         if ((sin6+1)->sin6_family != AF_INET6)
2448                                 return -EINVAL;
2449                         memcpy(&saddr->a6, &sin6->sin6_addr,
2450                                sizeof(saddr->a6));
2451                         sin6++;
2452                         memcpy(&daddr->a6, &sin6->sin6_addr,
2453                                sizeof(daddr->a6));
2454                         *family = AF_INET6;
2455                         break;
2456                 }
2457 #endif
2458         default:
2459                 return -EINVAL;
2460         }
2461
2462         return 0;
2463 }
2464
2465 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2466                                     struct xfrm_migrate *m)
2467 {
2468         int err;
2469         struct sadb_x_ipsecrequest *rq2;
2470         int mode;
2471
2472         if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2473             len < rq1->sadb_x_ipsecrequest_len)
2474                 return -EINVAL;
2475
2476         /* old endoints */
2477         err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2478                                   &m->old_family);
2479         if (err)
2480                 return err;
2481
2482         rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2483         len -= rq1->sadb_x_ipsecrequest_len;
2484
2485         if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2486             len < rq2->sadb_x_ipsecrequest_len)
2487                 return -EINVAL;
2488
2489         /* new endpoints */
2490         err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2491                                   &m->new_family);
2492         if (err)
2493                 return err;
2494
2495         if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2496             rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2497             rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2498                 return -EINVAL;
2499
2500         m->proto = rq1->sadb_x_ipsecrequest_proto;
2501         if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2502                 return -EINVAL;
2503         m->mode = mode;
2504         m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2505
2506         return ((int)(rq1->sadb_x_ipsecrequest_len +
2507                       rq2->sadb_x_ipsecrequest_len));
2508 }
2509
2510 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2511                          struct sadb_msg *hdr, void **ext_hdrs)
2512 {
2513         int i, len, ret, err = -EINVAL;
2514         u8 dir;
2515         struct sadb_address *sa;
2516         struct sadb_x_policy *pol;
2517         struct sadb_x_ipsecrequest *rq;
2518         struct xfrm_selector sel;
2519         struct xfrm_migrate m[XFRM_MAX_DEPTH];
2520
2521         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2522             ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2523             !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2524                 err = -EINVAL;
2525                 goto out;
2526         }
2527
2528         pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2529         if (!pol) {
2530                 err = -EINVAL;
2531                 goto out;
2532         }
2533
2534         if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2535                 err = -EINVAL;
2536                 goto out;
2537         }
2538
2539         dir = pol->sadb_x_policy_dir - 1;
2540         memset(&sel, 0, sizeof(sel));
2541
2542         /* set source address info of selector */
2543         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2544         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2545         sel.prefixlen_s = sa->sadb_address_prefixlen;
2546         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2547         sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2548         if (sel.sport)
2549                 sel.sport_mask = htons(0xffff);
2550
2551         /* set destination address info of selector */
2552         sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2553         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2554         sel.prefixlen_d = sa->sadb_address_prefixlen;
2555         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2556         sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2557         if (sel.dport)
2558                 sel.dport_mask = htons(0xffff);
2559
2560         rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2561
2562         /* extract ipsecrequests */
2563         i = 0;
2564         len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2565
2566         while (len > 0 && i < XFRM_MAX_DEPTH) {
2567                 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2568                 if (ret < 0) {
2569                         err = ret;
2570                         goto out;
2571                 } else {
2572                         rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2573                         len -= ret;
2574                         i++;
2575                 }
2576         }
2577
2578         if (!i || len > 0) {
2579                 err = -EINVAL;
2580                 goto out;
2581         }
2582
2583         return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2584
2585  out:
2586         return err;
2587 }
2588 #else
2589 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2590                          struct sadb_msg *hdr, void **ext_hdrs)
2591 {
2592         return -ENOPROTOOPT;
2593 }
2594 #endif
2595
2596
2597 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2598 {
2599         unsigned int dir;
2600         int err = 0, delete;
2601         struct sadb_x_policy *pol;
2602         struct xfrm_policy *xp;
2603         struct km_event c;
2604
2605         if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2606                 return -EINVAL;
2607
2608         dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2609         if (dir >= XFRM_POLICY_MAX)
2610                 return -EINVAL;
2611
2612         delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2613         xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2614                               delete, &err);
2615         if (xp == NULL)
2616                 return -ENOENT;
2617
2618         if (delete) {
2619                 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2620                                 audit_get_loginuid(current), 0);
2621
2622                 if (err)
2623                         goto out;
2624                 c.seq = hdr->sadb_msg_seq;
2625                 c.pid = hdr->sadb_msg_pid;
2626                 c.data.byid = 1;
2627                 c.event = XFRM_MSG_DELPOLICY;
2628                 km_policy_notify(xp, dir, &c);
2629         } else {
2630                 err = key_pol_get_resp(sk, xp, hdr, dir);
2631         }
2632
2633 out:
2634         xfrm_pol_put(xp);
2635         return err;
2636 }
2637
2638 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2639 {
2640         struct pfkey_dump_data *data = ptr;
2641         struct sk_buff *out_skb;
2642         struct sadb_msg *out_hdr;
2643         int err;
2644
2645         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2646         if (IS_ERR(out_skb))
2647                 return PTR_ERR(out_skb);
2648
2649         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2650         if (err < 0)
2651                 return err;
2652
2653         out_hdr = (struct sadb_msg *) out_skb->data;
2654         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2655         out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2656         out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2657         out_hdr->sadb_msg_errno = 0;
2658         out_hdr->sadb_msg_seq = count;
2659         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2660         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2661         return 0;
2662 }
2663
2664 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2665 {
2666         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2667
2668         return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data);
2669 }
2670
2671 static int key_notify_policy_flush(struct km_event *c)
2672 {
2673         struct sk_buff *skb_out;
2674         struct sadb_msg *hdr;
2675
2676         skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2677         if (!skb_out)
2678                 return -ENOBUFS;
2679         hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2680         hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2681         hdr->sadb_msg_seq = c->seq;
2682         hdr->sadb_msg_pid = c->pid;
2683         hdr->sadb_msg_version = PF_KEY_V2;
2684         hdr->sadb_msg_errno = (uint8_t) 0;
2685         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2686         pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2687         return 0;
2688
2689 }
2690
2691 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2692 {
2693         struct km_event c;
2694         struct xfrm_audit audit_info;
2695         int err;
2696
2697         audit_info.loginuid = audit_get_loginuid(current);
2698         audit_info.secid = 0;
2699         err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2700         if (err)
2701                 return err;
2702         c.data.type = XFRM_POLICY_TYPE_MAIN;
2703         c.event = XFRM_MSG_FLUSHPOLICY;
2704         c.pid = hdr->sadb_msg_pid;
2705         c.seq = hdr->sadb_msg_seq;
2706         km_policy_notify(NULL, 0, &c);
2707
2708         return 0;
2709 }
2710
2711 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2712                              struct sadb_msg *hdr, void **ext_hdrs);
2713 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2714         [SADB_RESERVED]         = pfkey_reserved,
2715         [SADB_GETSPI]           = pfkey_getspi,
2716         [SADB_UPDATE]           = pfkey_add,
2717         [SADB_ADD]              = pfkey_add,
2718         [SADB_DELETE]           = pfkey_delete,
2719         [SADB_GET]              = pfkey_get,
2720         [SADB_ACQUIRE]          = pfkey_acquire,
2721         [SADB_REGISTER]         = pfkey_register,
2722         [SADB_EXPIRE]           = NULL,
2723         [SADB_FLUSH]            = pfkey_flush,
2724         [SADB_DUMP]             = pfkey_dump,
2725         [SADB_X_PROMISC]        = pfkey_promisc,
2726         [SADB_X_PCHANGE]        = NULL,
2727         [SADB_X_SPDUPDATE]      = pfkey_spdadd,
2728         [SADB_X_SPDADD]         = pfkey_spdadd,
2729         [SADB_X_SPDDELETE]      = pfkey_spddelete,
2730         [SADB_X_SPDGET]         = pfkey_spdget,
2731         [SADB_X_SPDACQUIRE]     = NULL,
2732         [SADB_X_SPDDUMP]        = pfkey_spddump,
2733         [SADB_X_SPDFLUSH]       = pfkey_spdflush,
2734         [SADB_X_SPDSETIDX]      = pfkey_spdadd,
2735         [SADB_X_SPDDELETE2]     = pfkey_spdget,
2736         [SADB_X_MIGRATE]        = pfkey_migrate,
2737 };
2738
2739 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2740 {
2741         void *ext_hdrs[SADB_EXT_MAX];
2742         int err;
2743
2744         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2745                         BROADCAST_PROMISC_ONLY, NULL);
2746
2747         memset(ext_hdrs, 0, sizeof(ext_hdrs));
2748         err = parse_exthdrs(skb, hdr, ext_hdrs);
2749         if (!err) {
2750                 err = -EOPNOTSUPP;
2751                 if (pfkey_funcs[hdr->sadb_msg_type])
2752                         err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2753         }
2754         return err;
2755 }
2756
2757 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2758 {
2759         struct sadb_msg *hdr = NULL;
2760
2761         if (skb->len < sizeof(*hdr)) {
2762                 *errp = -EMSGSIZE;
2763         } else {
2764                 hdr = (struct sadb_msg *) skb->data;
2765                 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2766                     hdr->sadb_msg_reserved != 0 ||
2767                     (hdr->sadb_msg_type <= SADB_RESERVED ||
2768                      hdr->sadb_msg_type > SADB_MAX)) {
2769                         hdr = NULL;
2770                         *errp = -EINVAL;
2771                 } else if (hdr->sadb_msg_len != (skb->len /
2772                                                  sizeof(uint64_t)) ||
2773                            hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2774                                                 sizeof(uint64_t))) {
2775                         hdr = NULL;
2776                         *errp = -EMSGSIZE;
2777                 } else {
2778                         *errp = 0;
2779                 }
2780         }
2781         return hdr;
2782 }
2783
2784 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2785 {
2786         unsigned int id = d->desc.sadb_alg_id;
2787
2788         if (id >= sizeof(t->aalgos) * 8)
2789                 return 0;
2790
2791         return (t->aalgos >> id) & 1;
2792 }
2793
2794 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2795 {
2796         unsigned int id = d->desc.sadb_alg_id;
2797
2798         if (id >= sizeof(t->ealgos) * 8)
2799                 return 0;
2800
2801         return (t->ealgos >> id) & 1;
2802 }
2803
2804 static int count_ah_combs(struct xfrm_tmpl *t)
2805 {
2806         int i, sz = 0;
2807
2808         for (i = 0; ; i++) {
2809                 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2810                 if (!aalg)
2811                         break;
2812                 if (aalg_tmpl_set(t, aalg) && aalg->available)
2813                         sz += sizeof(struct sadb_comb);
2814         }
2815         return sz + sizeof(struct sadb_prop);
2816 }
2817
2818 static int count_esp_combs(struct xfrm_tmpl *t)
2819 {
2820         int i, k, sz = 0;
2821
2822         for (i = 0; ; i++) {
2823                 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2824                 if (!ealg)
2825                         break;
2826
2827                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2828                         continue;
2829
2830                 for (k = 1; ; k++) {
2831                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2832                         if (!aalg)
2833                                 break;
2834
2835                         if (aalg_tmpl_set(t, aalg) && aalg->available)
2836                                 sz += sizeof(struct sadb_comb);
2837                 }
2838         }
2839         return sz + sizeof(struct sadb_prop);
2840 }
2841
2842 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2843 {
2844         struct sadb_prop *p;
2845         int i;
2846
2847         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2848         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2849         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2850         p->sadb_prop_replay = 32;
2851         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2852
2853         for (i = 0; ; i++) {
2854                 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2855                 if (!aalg)
2856                         break;
2857
2858                 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2859                         struct sadb_comb *c;
2860                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2861                         memset(c, 0, sizeof(*c));
2862                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2863                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2864                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2865                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2866                         c->sadb_comb_hard_addtime = 24*60*60;
2867                         c->sadb_comb_soft_addtime = 20*60*60;
2868                         c->sadb_comb_hard_usetime = 8*60*60;
2869                         c->sadb_comb_soft_usetime = 7*60*60;
2870                 }
2871         }
2872 }
2873
2874 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2875 {
2876         struct sadb_prop *p;
2877         int i, k;
2878
2879         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2880         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2881         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2882         p->sadb_prop_replay = 32;
2883         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2884
2885         for (i=0; ; i++) {
2886                 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2887                 if (!ealg)
2888                         break;
2889
2890                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2891                         continue;
2892
2893                 for (k = 1; ; k++) {
2894                         struct sadb_comb *c;
2895                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2896                         if (!aalg)
2897                                 break;
2898                         if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2899                                 continue;
2900                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2901                         memset(c, 0, sizeof(*c));
2902                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2903                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2904                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2905                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2906                         c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2907                         c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2908                         c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2909                         c->sadb_comb_hard_addtime = 24*60*60;
2910                         c->sadb_comb_soft_addtime = 20*60*60;
2911                         c->sadb_comb_hard_usetime = 8*60*60;
2912                         c->sadb_comb_soft_usetime = 7*60*60;
2913                 }
2914         }
2915 }
2916
2917 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2918 {
2919         return 0;
2920 }
2921
2922 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2923 {
2924         struct sk_buff *out_skb;
2925         struct sadb_msg *out_hdr;
2926         int hard;
2927         int hsc;
2928
2929         hard = c->data.hard;
2930         if (hard)
2931                 hsc = 2;
2932         else
2933                 hsc = 1;
2934
2935         out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
2936         if (IS_ERR(out_skb))
2937                 return PTR_ERR(out_skb);
2938
2939         out_hdr = (struct sadb_msg *) out_skb->data;
2940         out_hdr->sadb_msg_version = PF_KEY_V2;
2941         out_hdr->sadb_msg_type = SADB_EXPIRE;
2942         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2943         out_hdr->sadb_msg_errno = 0;
2944         out_hdr->sadb_msg_reserved = 0;
2945         out_hdr->sadb_msg_seq = 0;
2946         out_hdr->sadb_msg_pid = 0;
2947
2948         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2949         return 0;
2950 }
2951
2952 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2953 {
2954         switch (c->event) {
2955         case XFRM_MSG_EXPIRE:
2956                 return key_notify_sa_expire(x, c);
2957         case XFRM_MSG_DELSA:
2958         case XFRM_MSG_NEWSA:
2959         case XFRM_MSG_UPDSA:
2960                 return key_notify_sa(x, c);
2961         case XFRM_MSG_FLUSHSA:
2962                 return key_notify_sa_flush(c);
2963         case XFRM_MSG_NEWAE: /* not yet supported */
2964                 break;
2965         default:
2966                 printk("pfkey: Unknown SA event %d\n", c->event);
2967                 break;
2968         }
2969
2970         return 0;
2971 }
2972
2973 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2974 {
2975         if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2976                 return 0;
2977
2978         switch (c->event) {
2979         case XFRM_MSG_POLEXPIRE:
2980                 return key_notify_policy_expire(xp, c);
2981         case XFRM_MSG_DELPOLICY:
2982         case XFRM_MSG_NEWPOLICY:
2983         case XFRM_MSG_UPDPOLICY:
2984                 return key_notify_policy(xp, dir, c);
2985         case XFRM_MSG_FLUSHPOLICY:
2986                 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2987                         break;
2988                 return key_notify_policy_flush(c);
2989         default:
2990                 printk("pfkey: Unknown policy event %d\n", c->event);
2991                 break;
2992         }
2993
2994         return 0;
2995 }
2996
2997 static u32 get_acqseq(void)
2998 {
2999         u32 res;
3000         static u32 acqseq;
3001         static DEFINE_SPINLOCK(acqseq_lock);
3002
3003         spin_lock_bh(&acqseq_lock);
3004         res = (++acqseq ? : ++acqseq);
3005         spin_unlock_bh(&acqseq_lock);
3006         return res;
3007 }
3008
3009 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
3010 {
3011         struct sk_buff *skb;
3012         struct sadb_msg *hdr;
3013         struct sadb_address *addr;
3014         struct sadb_x_policy *pol;
3015         struct sockaddr_in *sin;
3016 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3017         struct sockaddr_in6 *sin6;
3018 #endif
3019         int sockaddr_size;
3020         int size;
3021         struct sadb_x_sec_ctx *sec_ctx;
3022         struct xfrm_sec_ctx *xfrm_ctx;
3023         int ctx_size = 0;
3024
3025         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3026         if (!sockaddr_size)
3027                 return -EINVAL;
3028
3029         size = sizeof(struct sadb_msg) +
3030                 (sizeof(struct sadb_address) * 2) +
3031                 (sockaddr_size * 2) +
3032                 sizeof(struct sadb_x_policy);
3033
3034         if (x->id.proto == IPPROTO_AH)
3035                 size += count_ah_combs(t);
3036         else if (x->id.proto == IPPROTO_ESP)
3037                 size += count_esp_combs(t);
3038
3039         if ((xfrm_ctx = x->security)) {
3040                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3041                 size +=  sizeof(struct sadb_x_sec_ctx) + ctx_size;
3042         }
3043
3044         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3045         if (skb == NULL)
3046                 return -ENOMEM;
3047
3048         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3049         hdr->sadb_msg_version = PF_KEY_V2;
3050         hdr->sadb_msg_type = SADB_ACQUIRE;
3051         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3052         hdr->sadb_msg_len = size / sizeof(uint64_t);
3053         hdr->sadb_msg_errno = 0;
3054         hdr->sadb_msg_reserved = 0;
3055         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3056         hdr->sadb_msg_pid = 0;
3057
3058         /* src address */
3059         addr = (struct sadb_address*) skb_put(skb,
3060                                               sizeof(struct sadb_address)+sockaddr_size);
3061         addr->sadb_address_len =
3062                 (sizeof(struct sadb_address)+sockaddr_size)/
3063                         sizeof(uint64_t);
3064         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3065         addr->sadb_address_proto = 0;
3066         addr->sadb_address_reserved = 0;
3067         if (x->props.family == AF_INET) {
3068                 addr->sadb_address_prefixlen = 32;
3069
3070                 sin = (struct sockaddr_in *) (addr + 1);
3071                 sin->sin_family = AF_INET;
3072                 sin->sin_addr.s_addr = x->props.saddr.a4;
3073                 sin->sin_port = 0;
3074                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3075         }
3076 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3077         else if (x->props.family == AF_INET6) {
3078                 addr->sadb_address_prefixlen = 128;
3079
3080                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3081                 sin6->sin6_family = AF_INET6;
3082                 sin6->sin6_port = 0;
3083                 sin6->sin6_flowinfo = 0;
3084                 memcpy(&sin6->sin6_addr,
3085                        x->props.saddr.a6, sizeof(struct in6_addr));
3086                 sin6->sin6_scope_id = 0;
3087         }
3088 #endif
3089         else
3090                 BUG();
3091
3092         /* dst address */
3093         addr = (struct sadb_address*) skb_put(skb,
3094                                               sizeof(struct sadb_address)+sockaddr_size);
3095         addr->sadb_address_len =
3096                 (sizeof(struct sadb_address)+sockaddr_size)/
3097                         sizeof(uint64_t);
3098         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3099         addr->sadb_address_proto = 0;
3100         addr->sadb_address_reserved = 0;
3101         if (x->props.family == AF_INET) {
3102                 addr->sadb_address_prefixlen = 32;
3103
3104                 sin = (struct sockaddr_in *) (addr + 1);
3105                 sin->sin_family = AF_INET;
3106                 sin->sin_addr.s_addr = x->id.daddr.a4;
3107                 sin->sin_port = 0;
3108                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3109         }
3110 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3111         else if (x->props.family == AF_INET6) {
3112                 addr->sadb_address_prefixlen = 128;
3113
3114                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3115                 sin6->sin6_family = AF_INET6;
3116                 sin6->sin6_port = 0;
3117                 sin6->sin6_flowinfo = 0;
3118                 memcpy(&sin6->sin6_addr,
3119                        x->id.daddr.a6, sizeof(struct in6_addr));
3120                 sin6->sin6_scope_id = 0;
3121         }
3122 #endif
3123         else
3124                 BUG();
3125
3126         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
3127         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3128         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3129         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3130         pol->sadb_x_policy_dir = dir+1;
3131         pol->sadb_x_policy_id = xp->index;
3132
3133         /* Set sadb_comb's. */
3134         if (x->id.proto == IPPROTO_AH)
3135                 dump_ah_combs(skb, t);
3136         else if (x->id.proto == IPPROTO_ESP)
3137                 dump_esp_combs(skb, t);
3138
3139         /* security context */
3140         if (xfrm_ctx) {
3141                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3142                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3143                 sec_ctx->sadb_x_sec_len =
3144                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3145                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3146                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3147                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3148                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3149                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3150                        xfrm_ctx->ctx_len);
3151         }
3152
3153         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3154 }
3155
3156 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3157                                                 u8 *data, int len, int *dir)
3158 {
3159         struct xfrm_policy *xp;
3160         struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3161         struct sadb_x_sec_ctx *sec_ctx;
3162
3163         switch (sk->sk_family) {
3164         case AF_INET:
3165                 if (opt != IP_IPSEC_POLICY) {
3166                         *dir = -EOPNOTSUPP;
3167                         return NULL;
3168                 }
3169                 break;
3170 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3171         case AF_INET6:
3172                 if (opt != IPV6_IPSEC_POLICY) {
3173                         *dir = -EOPNOTSUPP;
3174                         return NULL;
3175                 }
3176                 break;
3177 #endif
3178         default:
3179                 *dir = -EINVAL;
3180                 return NULL;
3181         }
3182
3183         *dir = -EINVAL;
3184
3185         if (len < sizeof(struct sadb_x_policy) ||
3186             pol->sadb_x_policy_len*8 > len ||
3187             pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3188             (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3189                 return NULL;
3190
3191         xp = xfrm_policy_alloc(GFP_ATOMIC);
3192         if (xp == NULL) {
3193                 *dir = -ENOBUFS;
3194                 return NULL;
3195         }
3196
3197         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3198                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3199
3200         xp->lft.soft_byte_limit = XFRM_INF;
3201         xp->lft.hard_byte_limit = XFRM_INF;
3202         xp->lft.soft_packet_limit = XFRM_INF;
3203         xp->lft.hard_packet_limit = XFRM_INF;
3204         xp->family = sk->sk_family;
3205
3206         xp->xfrm_nr = 0;
3207         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3208             (*dir = parse_ipsecrequests(xp, pol)) < 0)
3209                 goto out;
3210
3211         /* security context too */
3212         if (len >= (pol->sadb_x_policy_len*8 +
3213             sizeof(struct sadb_x_sec_ctx))) {
3214                 char *p = (char *)pol;
3215                 struct xfrm_user_sec_ctx *uctx;
3216
3217                 p += pol->sadb_x_policy_len*8;
3218                 sec_ctx = (struct sadb_x_sec_ctx *)p;
3219                 if (len < pol->sadb_x_policy_len*8 +
3220                     sec_ctx->sadb_x_sec_len) {
3221                         *dir = -EINVAL;
3222                         goto out;
3223                 }
3224                 if ((*dir = verify_sec_ctx_len(p)))
3225                         goto out;
3226                 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3227                 *dir = security_xfrm_policy_alloc(xp, uctx);
3228                 kfree(uctx);
3229
3230                 if (*dir)
3231                         goto out;
3232         }
3233
3234         *dir = pol->sadb_x_policy_dir-1;
3235         return xp;
3236
3237 out:
3238         xfrm_policy_destroy(xp);
3239         return NULL;
3240 }
3241
3242 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3243 {
3244         struct sk_buff *skb;
3245         struct sadb_msg *hdr;
3246         struct sadb_sa *sa;
3247         struct sadb_address *addr;
3248         struct sadb_x_nat_t_port *n_port;
3249         struct sockaddr_in *sin;
3250 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3251         struct sockaddr_in6 *sin6;
3252 #endif
3253         int sockaddr_size;
3254         int size;
3255         __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3256         struct xfrm_encap_tmpl *natt = NULL;
3257
3258         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3259         if (!sockaddr_size)
3260                 return -EINVAL;
3261
3262         if (!satype)
3263                 return -EINVAL;
3264
3265         if (!x->encap)
3266                 return -EINVAL;
3267
3268         natt = x->encap;
3269
3270         /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3271          *
3272          * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3273          * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3274          */
3275
3276         size = sizeof(struct sadb_msg) +
3277                 sizeof(struct sadb_sa) +
3278                 (sizeof(struct sadb_address) * 2) +
3279                 (sockaddr_size * 2) +
3280                 (sizeof(struct sadb_x_nat_t_port) * 2);
3281
3282         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3283         if (skb == NULL)
3284                 return -ENOMEM;
3285
3286         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3287         hdr->sadb_msg_version = PF_KEY_V2;
3288         hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3289         hdr->sadb_msg_satype = satype;
3290         hdr->sadb_msg_len = size / sizeof(uint64_t);
3291         hdr->sadb_msg_errno = 0;
3292         hdr->sadb_msg_reserved = 0;
3293         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3294         hdr->sadb_msg_pid = 0;
3295
3296         /* SA */
3297         sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3298         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3299         sa->sadb_sa_exttype = SADB_EXT_SA;
3300         sa->sadb_sa_spi = x->id.spi;
3301         sa->sadb_sa_replay = 0;
3302         sa->sadb_sa_state = 0;
3303         sa->sadb_sa_auth = 0;
3304         sa->sadb_sa_encrypt = 0;
3305         sa->sadb_sa_flags = 0;
3306
3307         /* ADDRESS_SRC (old addr) */
3308         addr = (struct sadb_address*)
3309                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3310         addr->sadb_address_len =
3311                 (sizeof(struct sadb_address)+sockaddr_size)/
3312                         sizeof(uint64_t);
3313         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3314         addr->sadb_address_proto = 0;
3315         addr->sadb_address_reserved = 0;
3316         if (x->props.family == AF_INET) {
3317                 addr->sadb_address_prefixlen = 32;
3318
3319                 sin = (struct sockaddr_in *) (addr + 1);
3320                 sin->sin_family = AF_INET;
3321                 sin->sin_addr.s_addr = x->props.saddr.a4;
3322                 sin->sin_port = 0;
3323                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3324         }
3325 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3326         else if (x->props.family == AF_INET6) {
3327                 addr->sadb_address_prefixlen = 128;
3328
3329                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3330                 sin6->sin6_family = AF_INET6;
3331                 sin6->sin6_port = 0;
3332                 sin6->sin6_flowinfo = 0;
3333                 memcpy(&sin6->sin6_addr,
3334                        x->props.saddr.a6, sizeof(struct in6_addr));
3335                 sin6->sin6_scope_id = 0;
3336         }
3337 #endif
3338         else
3339                 BUG();
3340
3341         /* NAT_T_SPORT (old port) */
3342         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3343         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3344         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3345         n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3346         n_port->sadb_x_nat_t_port_reserved = 0;
3347
3348         /* ADDRESS_DST (new addr) */
3349         addr = (struct sadb_address*)
3350                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3351         addr->sadb_address_len =
3352                 (sizeof(struct sadb_address)+sockaddr_size)/
3353                         sizeof(uint64_t);
3354         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3355         addr->sadb_address_proto = 0;
3356         addr->sadb_address_reserved = 0;
3357         if (x->props.family == AF_INET) {
3358                 addr->sadb_address_prefixlen = 32;
3359
3360                 sin = (struct sockaddr_in *) (addr + 1);
3361                 sin->sin_family = AF_INET;
3362                 sin->sin_addr.s_addr = ipaddr->a4;
3363                 sin->sin_port = 0;
3364                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3365         }
3366 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3367         else if (x->props.family == AF_INET6) {
3368                 addr->sadb_address_prefixlen = 128;
3369
3370                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3371                 sin6->sin6_family = AF_INET6;
3372                 sin6->sin6_port = 0;
3373                 sin6->sin6_flowinfo = 0;
3374                 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3375                 sin6->sin6_scope_id = 0;
3376         }
3377 #endif
3378         else
3379                 BUG();
3380
3381         /* NAT_T_DPORT (new port) */
3382         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3383         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3384         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3385         n_port->sadb_x_nat_t_port_port = sport;
3386         n_port->sadb_x_nat_t_port_reserved = 0;
3387
3388         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3389 }
3390
3391 #ifdef CONFIG_NET_KEY_MIGRATE
3392 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3393                             struct xfrm_selector *sel)
3394 {
3395         struct sadb_address *addr;
3396         struct sockaddr_in *sin;
3397 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3398         struct sockaddr_in6 *sin6;
3399 #endif
3400         addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3401         addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3402         addr->sadb_address_exttype = type;
3403         addr->sadb_address_proto = sel->proto;
3404         addr->sadb_address_reserved = 0;
3405
3406         switch (type) {
3407         case SADB_EXT_ADDRESS_SRC:
3408                 if (sel->family == AF_INET) {
3409                         addr->sadb_address_prefixlen = sel->prefixlen_s;
3410                         sin = (struct sockaddr_in *)(addr + 1);
3411                         sin->sin_family = AF_INET;
3412                         memcpy(&sin->sin_addr.s_addr, &sel->saddr,
3413                                sizeof(sin->sin_addr.s_addr));
3414                         sin->sin_port = 0;
3415                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3416                 }
3417 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3418                 else if (sel->family == AF_INET6) {
3419                         addr->sadb_address_prefixlen = sel->prefixlen_s;
3420                         sin6 = (struct sockaddr_in6 *)(addr + 1);
3421                         sin6->sin6_family = AF_INET6;
3422                         sin6->sin6_port = 0;
3423                         sin6->sin6_flowinfo = 0;
3424                         sin6->sin6_scope_id = 0;
3425                         memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr,
3426                                sizeof(sin6->sin6_addr.s6_addr));
3427                 }
3428 #endif
3429                 break;
3430         case SADB_EXT_ADDRESS_DST:
3431                 if (sel->family == AF_INET) {
3432                         addr->sadb_address_prefixlen = sel->prefixlen_d;
3433                         sin = (struct sockaddr_in *)(addr + 1);
3434                         sin->sin_family = AF_INET;
3435                         memcpy(&sin->sin_addr.s_addr, &sel->daddr,
3436                                sizeof(sin->sin_addr.s_addr));
3437                         sin->sin_port = 0;
3438                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3439                 }
3440 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3441                 else if (sel->family == AF_INET6) {
3442                         addr->sadb_address_prefixlen = sel->prefixlen_d;
3443                         sin6 = (struct sockaddr_in6 *)(addr + 1);
3444                         sin6->sin6_family = AF_INET6;
3445                         sin6->sin6_port = 0;
3446                         sin6->sin6_flowinfo = 0;
3447                         sin6->sin6_scope_id = 0;
3448                         memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr,
3449                                sizeof(sin6->sin6_addr.s6_addr));
3450                 }
3451 #endif
3452                 break;
3453         default:
3454                 return -EINVAL;
3455         }
3456
3457         return 0;
3458 }
3459
3460 static int set_ipsecrequest(struct sk_buff *skb,
3461                             uint8_t proto, uint8_t mode, int level,
3462                             uint32_t reqid, uint8_t family,
3463                             xfrm_address_t *src, xfrm_address_t *dst)
3464 {
3465         struct sadb_x_ipsecrequest *rq;
3466         struct sockaddr_in *sin;
3467 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3468         struct sockaddr_in6 *sin6;
3469 #endif
3470         int size_req;
3471
3472         size_req = sizeof(struct sadb_x_ipsecrequest) +
3473                    pfkey_sockaddr_pair_size(family);
3474
3475         rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3476         memset(rq, 0, size_req);
3477         rq->sadb_x_ipsecrequest_len = size_req;
3478         rq->sadb_x_ipsecrequest_proto = proto;
3479         rq->sadb_x_ipsecrequest_mode = mode;
3480         rq->sadb_x_ipsecrequest_level = level;
3481         rq->sadb_x_ipsecrequest_reqid = reqid;
3482
3483         switch (family) {
3484         case AF_INET:
3485                 sin = (struct sockaddr_in *)(rq + 1);
3486                 sin->sin_family = AF_INET;
3487                 memcpy(&sin->sin_addr.s_addr, src,
3488                        sizeof(sin->sin_addr.s_addr));
3489                 sin++;
3490                 sin->sin_family = AF_INET;
3491                 memcpy(&sin->sin_addr.s_addr, dst,
3492                        sizeof(sin->sin_addr.s_addr));
3493                 break;
3494 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3495         case AF_INET6:
3496                 sin6 = (struct sockaddr_in6 *)(rq + 1);
3497                 sin6->sin6_family = AF_INET6;
3498                 sin6->sin6_port = 0;
3499                 sin6->sin6_flowinfo = 0;
3500                 sin6->sin6_scope_id = 0;
3501                 memcpy(&sin6->sin6_addr.s6_addr, src,
3502                        sizeof(sin6->sin6_addr.s6_addr));
3503                 sin6++;
3504                 sin6->sin6_family = AF_INET6;
3505                 sin6->sin6_port = 0;
3506                 sin6->sin6_flowinfo = 0;
3507                 sin6->sin6_scope_id = 0;
3508                 memcpy(&sin6->sin6_addr.s6_addr, dst,
3509                        sizeof(sin6->sin6_addr.s6_addr));
3510                 break;
3511 #endif
3512         default:
3513                 return -EINVAL;
3514         }
3515
3516         return 0;
3517 }
3518 #endif
3519
3520 #ifdef CONFIG_NET_KEY_MIGRATE
3521 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3522                               struct xfrm_migrate *m, int num_bundles)
3523 {
3524         int i;
3525         int sasize_sel;
3526         int size = 0;
3527         int size_pol = 0;
3528         struct sk_buff *skb;
3529         struct sadb_msg *hdr;
3530         struct sadb_x_policy *pol;
3531         struct xfrm_migrate *mp;
3532
3533         if (type != XFRM_POLICY_TYPE_MAIN)
3534                 return 0;
3535
3536         if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3537                 return -EINVAL;
3538
3539         /* selector */
3540         sasize_sel = pfkey_sockaddr_size(sel->family);
3541         if (!sasize_sel)
3542                 return -EINVAL;
3543         size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3544
3545         /* policy info */
3546         size_pol += sizeof(struct sadb_x_policy);
3547
3548         /* ipsecrequests */
3549         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3550                 /* old locator pair */
3551                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3552                             pfkey_sockaddr_pair_size(mp->old_family);
3553                 /* new locator pair */
3554                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3555                             pfkey_sockaddr_pair_size(mp->new_family);
3556         }
3557
3558         size += sizeof(struct sadb_msg) + size_pol;
3559
3560         /* alloc buffer */
3561         skb = alloc_skb(size, GFP_ATOMIC);
3562         if (skb == NULL)
3563                 return -ENOMEM;
3564
3565         hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3566         hdr->sadb_msg_version = PF_KEY_V2;
3567         hdr->sadb_msg_type = SADB_X_MIGRATE;
3568         hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3569         hdr->sadb_msg_len = size / 8;
3570         hdr->sadb_msg_errno = 0;
3571         hdr->sadb_msg_reserved = 0;
3572         hdr->sadb_msg_seq = 0;
3573         hdr->sadb_msg_pid = 0;
3574
3575         /* selector src */
3576         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3577
3578         /* selector dst */
3579         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3580
3581         /* policy information */
3582         pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3583         pol->sadb_x_policy_len = size_pol / 8;
3584         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3585         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3586         pol->sadb_x_policy_dir = dir + 1;
3587         pol->sadb_x_policy_id = 0;
3588         pol->sadb_x_policy_priority = 0;
3589
3590         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3591                 /* old ipsecrequest */
3592                 int mode = pfkey_mode_from_xfrm(mp->mode);
3593                 if (mode < 0)
3594                         goto err;
3595                 if (set_ipsecrequest(skb, mp->proto, mode,
3596                                      (mp->reqid ?  IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3597                                      mp->reqid, mp->old_family,
3598                                      &mp->old_saddr, &mp->old_daddr) < 0)
3599                         goto err;
3600
3601                 /* new ipsecrequest */
3602                 if (set_ipsecrequest(skb, mp->proto, mode,
3603                                      (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3604                                      mp->reqid, mp->new_family,
3605                                      &mp->new_saddr, &mp->new_daddr) < 0)
3606                         goto err;
3607         }
3608
3609         /* broadcast migrate message to sockets */
3610         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3611
3612         return 0;
3613
3614 err:
3615         kfree_skb(skb);
3616         return -EINVAL;
3617 }
3618 #else
3619 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3620                               struct xfrm_migrate *m, int num_bundles)
3621 {
3622         return -ENOPROTOOPT;
3623 }
3624 #endif
3625
3626 static int pfkey_sendmsg(struct kiocb *kiocb,
3627                          struct socket *sock, struct msghdr *msg, size_t len)
3628 {
3629         struct sock *sk = sock->sk;
3630         struct sk_buff *skb = NULL;
3631         struct sadb_msg *hdr = NULL;
3632         int err;
3633
3634         err = -EOPNOTSUPP;
3635         if (msg->msg_flags & MSG_OOB)
3636                 goto out;
3637
3638         err = -EMSGSIZE;
3639         if ((unsigned)len > sk->sk_sndbuf - 32)
3640                 goto out;
3641
3642         err = -ENOBUFS;
3643         skb = alloc_skb(len, GFP_KERNEL);
3644         if (skb == NULL)
3645                 goto out;
3646
3647         err = -EFAULT;
3648         if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3649                 goto out;
3650
3651         hdr = pfkey_get_base_msg(skb, &err);
3652         if (!hdr)
3653                 goto out;
3654
3655         mutex_lock(&xfrm_cfg_mutex);
3656         err = pfkey_process(sk, skb, hdr);
3657         mutex_unlock(&xfrm_cfg_mutex);
3658
3659 out:
3660         if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3661                 err = 0;
3662         if (skb)
3663                 kfree_skb(skb);
3664
3665         return err ? : len;
3666 }
3667
3668 static int pfkey_recvmsg(struct kiocb *kiocb,
3669                          struct socket *sock, struct msghdr *msg, size_t len,
3670                          int flags)
3671 {
3672         struct sock *sk = sock->sk;
3673         struct sk_buff *skb;
3674         int copied, err;
3675
3676         err = -EINVAL;
3677         if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3678                 goto out;
3679
3680         msg->msg_namelen = 0;
3681         skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3682         if (skb == NULL)
3683                 goto out;
3684
3685         copied = skb->len;
3686         if (copied > len) {
3687                 msg->msg_flags |= MSG_TRUNC;
3688                 copied = len;
3689         }
3690
3691         skb_reset_transport_header(skb);
3692         err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3693         if (err)
3694                 goto out_free;
3695
3696         sock_recv_timestamp(msg, sk, skb);
3697
3698         err = (flags & MSG_TRUNC) ? skb->len : copied;
3699
3700 out_free:
3701         skb_free_datagram(sk, skb);
3702 out:
3703         return err;
3704 }
3705
3706 static const struct proto_ops pfkey_ops = {
3707         .family         =       PF_KEY,
3708         .owner          =       THIS_MODULE,
3709         /* Operations that make no sense on pfkey sockets. */
3710         .bind           =       sock_no_bind,
3711         .connect        =       sock_no_connect,
3712         .socketpair     =       sock_no_socketpair,
3713         .accept         =       sock_no_accept,
3714         .getname        =       sock_no_getname,
3715         .ioctl          =       sock_no_ioctl,
3716         .listen         =       sock_no_listen,
3717         .shutdown       =       sock_no_shutdown,
3718         .setsockopt     =       sock_no_setsockopt,
3719         .getsockopt     =       sock_no_getsockopt,
3720         .mmap           =       sock_no_mmap,
3721         .sendpage       =       sock_no_sendpage,
3722
3723         /* Now the operations that really occur. */
3724         .release        =       pfkey_release,
3725         .poll           =       datagram_poll,
3726         .sendmsg        =       pfkey_sendmsg,
3727         .recvmsg        =       pfkey_recvmsg,
3728 };
3729
3730 static struct net_proto_family pfkey_family_ops = {
3731         .family =       PF_KEY,
3732         .create =       pfkey_create,
3733         .owner  =       THIS_MODULE,
3734 };
3735
3736 #ifdef CONFIG_PROC_FS
3737 static int pfkey_seq_show(struct seq_file *f, void *v)
3738 {
3739         struct sock *s;
3740
3741         s = (struct sock *)v;
3742         if (v == SEQ_START_TOKEN)
3743                 seq_printf(f ,"sk       RefCnt Rmem   Wmem   User   Inode\n");
3744         else
3745                 seq_printf(f ,"%p %-6d %-6u %-6u %-6u %-6lu\n",
3746                                s,
3747                                atomic_read(&s->sk_refcnt),
3748                                atomic_read(&s->sk_rmem_alloc),
3749                                atomic_read(&s->sk_wmem_alloc),
3750                                sock_i_uid(s),
3751                                sock_i_ino(s)
3752                                );
3753         return 0;
3754 }
3755
3756 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3757 {
3758         struct sock *s;
3759         struct hlist_node *node;
3760         loff_t pos = *ppos;
3761
3762         read_lock(&pfkey_table_lock);
3763         if (pos == 0)
3764                 return SEQ_START_TOKEN;
3765
3766         sk_for_each(s, node, &pfkey_table)
3767                 if (pos-- == 1)
3768                         return s;
3769
3770         return NULL;
3771 }
3772
3773 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3774 {
3775         ++*ppos;
3776         return (v == SEQ_START_TOKEN) ?
3777                 sk_head(&pfkey_table) :
3778                         sk_next((struct sock *)v);
3779 }
3780
3781 static void pfkey_seq_stop(struct seq_file *f, void *v)
3782 {
3783         read_unlock(&pfkey_table_lock);
3784 }
3785
3786 static struct seq_operations pfkey_seq_ops = {
3787         .start  = pfkey_seq_start,
3788         .next   = pfkey_seq_next,
3789         .stop   = pfkey_seq_stop,
3790         .show   = pfkey_seq_show,
3791 };
3792
3793 static int pfkey_seq_open(struct inode *inode, struct file *file)
3794 {
3795         return seq_open(file, &pfkey_seq_ops);
3796 }
3797
3798 static struct file_operations pfkey_proc_ops = {
3799         .open    = pfkey_seq_open,
3800         .read    = seq_read,
3801         .llseek  = seq_lseek,
3802         .release = seq_release,
3803 };
3804
3805 static int pfkey_init_proc(void)
3806 {
3807         struct proc_dir_entry *e;
3808
3809         e = create_proc_entry("pfkey", 0, init_net.proc_net);
3810         if (e == NULL)
3811                 return -ENOMEM;
3812
3813         e->proc_fops = &pfkey_proc_ops;
3814         return 0;
3815 }
3816
3817 static void pfkey_exit_proc(void)
3818 {
3819         remove_proc_entry("net/pfkey", NULL);
3820 }
3821 #else
3822 static inline int pfkey_init_proc(void)
3823 {
3824         return 0;
3825 }
3826
3827 static inline void pfkey_exit_proc(void)
3828 {
3829 }
3830 #endif
3831
3832 static struct xfrm_mgr pfkeyv2_mgr =
3833 {
3834         .id             = "pfkeyv2",
3835         .notify         = pfkey_send_notify,
3836         .acquire        = pfkey_send_acquire,
3837         .compile_policy = pfkey_compile_policy,
3838         .new_mapping    = pfkey_send_new_mapping,
3839         .notify_policy  = pfkey_send_policy_notify,
3840         .migrate        = pfkey_send_migrate,
3841 };
3842
3843 static void __exit ipsec_pfkey_exit(void)
3844 {
3845         xfrm_unregister_km(&pfkeyv2_mgr);
3846         pfkey_exit_proc();
3847         sock_unregister(PF_KEY);
3848         proto_unregister(&key_proto);
3849 }
3850
3851 static int __init ipsec_pfkey_init(void)
3852 {
3853         int err = proto_register(&key_proto, 0);
3854
3855         if (err != 0)
3856                 goto out;
3857
3858         err = sock_register(&pfkey_family_ops);
3859         if (err != 0)
3860                 goto out_unregister_key_proto;
3861         err = pfkey_init_proc();
3862         if (err != 0)
3863                 goto out_sock_unregister;
3864         err = xfrm_register_km(&pfkeyv2_mgr);
3865         if (err != 0)
3866                 goto out_remove_proc_entry;
3867 out:
3868         return err;
3869 out_remove_proc_entry:
3870         pfkey_exit_proc();
3871 out_sock_unregister:
3872         sock_unregister(PF_KEY);
3873 out_unregister_key_proto:
3874         proto_unregister(&key_proto);
3875         goto out;
3876 }
3877
3878 module_init(ipsec_pfkey_init);
3879 module_exit(ipsec_pfkey_exit);
3880 MODULE_LICENSE("GPL");
3881 MODULE_ALIAS_NETPROTO(PF_KEY);