345019345f09254292831cb75c6824d826592b09
[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/xfrm.h>
30 #include <linux/audit.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 socket *sock, int protocol)
140 {
141         struct sock *sk;
142         int err;
143
144         if (!capable(CAP_NET_ADMIN))
145                 return -EPERM;
146         if (sock->type != SOCK_RAW)
147                 return -ESOCKTNOSUPPORT;
148         if (protocol != PF_KEY_V2)
149                 return -EPROTONOSUPPORT;
150
151         err = -ENOMEM;
152         sk = sk_alloc(PF_KEY, GFP_KERNEL, &key_proto, 1);
153         if (sk == NULL)
154                 goto out;
155
156         sock->ops = &pfkey_ops;
157         sock_init_data(sock, sk);
158
159         sk->sk_family = PF_KEY;
160         sk->sk_destruct = pfkey_sock_destruct;
161
162         atomic_inc(&pfkey_socks_nr);
163
164         pfkey_insert(sk);
165
166         return 0;
167 out:
168         return err;
169 }
170
171 static int pfkey_release(struct socket *sock)
172 {
173         struct sock *sk = sock->sk;
174
175         if (!sk)
176                 return 0;
177
178         pfkey_remove(sk);
179
180         sock_orphan(sk);
181         sock->sk = NULL;
182         skb_queue_purge(&sk->sk_write_queue);
183         sock_put(sk);
184
185         return 0;
186 }
187
188 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
189                                gfp_t allocation, struct sock *sk)
190 {
191         int err = -ENOBUFS;
192
193         sock_hold(sk);
194         if (*skb2 == NULL) {
195                 if (atomic_read(&skb->users) != 1) {
196                         *skb2 = skb_clone(skb, allocation);
197                 } else {
198                         *skb2 = skb;
199                         atomic_inc(&skb->users);
200                 }
201         }
202         if (*skb2 != NULL) {
203                 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
204                         skb_orphan(*skb2);
205                         skb_set_owner_r(*skb2, sk);
206                         skb_queue_tail(&sk->sk_receive_queue, *skb2);
207                         sk->sk_data_ready(sk, (*skb2)->len);
208                         *skb2 = NULL;
209                         err = 0;
210                 }
211         }
212         sock_put(sk);
213         return err;
214 }
215
216 /* Send SKB to all pfkey sockets matching selected criteria.  */
217 #define BROADCAST_ALL           0
218 #define BROADCAST_ONE           1
219 #define BROADCAST_REGISTERED    2
220 #define BROADCAST_PROMISC_ONLY  4
221 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
222                            int broadcast_flags, struct sock *one_sk)
223 {
224         struct sock *sk;
225         struct hlist_node *node;
226         struct sk_buff *skb2 = NULL;
227         int err = -ESRCH;
228
229         /* XXX Do we need something like netlink_overrun?  I think
230          * XXX PF_KEY socket apps will not mind current behavior.
231          */
232         if (!skb)
233                 return -ENOMEM;
234
235         pfkey_lock_table();
236         sk_for_each(sk, node, &pfkey_table) {
237                 struct pfkey_sock *pfk = pfkey_sk(sk);
238                 int err2;
239
240                 /* Yes, it means that if you are meant to receive this
241                  * pfkey message you receive it twice as promiscuous
242                  * socket.
243                  */
244                 if (pfk->promisc)
245                         pfkey_broadcast_one(skb, &skb2, allocation, sk);
246
247                 /* the exact target will be processed later */
248                 if (sk == one_sk)
249                         continue;
250                 if (broadcast_flags != BROADCAST_ALL) {
251                         if (broadcast_flags & BROADCAST_PROMISC_ONLY)
252                                 continue;
253                         if ((broadcast_flags & BROADCAST_REGISTERED) &&
254                             !pfk->registered)
255                                 continue;
256                         if (broadcast_flags & BROADCAST_ONE)
257                                 continue;
258                 }
259
260                 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
261
262                 /* Error is cleare after succecful sending to at least one
263                  * registered KM */
264                 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
265                         err = err2;
266         }
267         pfkey_unlock_table();
268
269         if (one_sk != NULL)
270                 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
271
272         if (skb2)
273                 kfree_skb(skb2);
274         kfree_skb(skb);
275         return err;
276 }
277
278 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
279 {
280         *new = *orig;
281 }
282
283 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
284 {
285         struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
286         struct sadb_msg *hdr;
287
288         if (!skb)
289                 return -ENOBUFS;
290
291         /* Woe be to the platform trying to support PFKEY yet
292          * having normal errnos outside the 1-255 range, inclusive.
293          */
294         err = -err;
295         if (err == ERESTARTSYS ||
296             err == ERESTARTNOHAND ||
297             err == ERESTARTNOINTR)
298                 err = EINTR;
299         if (err >= 512)
300                 err = EINVAL;
301         BUG_ON(err <= 0 || err >= 256);
302
303         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
304         pfkey_hdr_dup(hdr, orig);
305         hdr->sadb_msg_errno = (uint8_t) err;
306         hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
307                              sizeof(uint64_t));
308
309         pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
310
311         return 0;
312 }
313
314 static u8 sadb_ext_min_len[] = {
315         [SADB_EXT_RESERVED]             = (u8) 0,
316         [SADB_EXT_SA]                   = (u8) sizeof(struct sadb_sa),
317         [SADB_EXT_LIFETIME_CURRENT]     = (u8) sizeof(struct sadb_lifetime),
318         [SADB_EXT_LIFETIME_HARD]        = (u8) sizeof(struct sadb_lifetime),
319         [SADB_EXT_LIFETIME_SOFT]        = (u8) sizeof(struct sadb_lifetime),
320         [SADB_EXT_ADDRESS_SRC]          = (u8) sizeof(struct sadb_address),
321         [SADB_EXT_ADDRESS_DST]          = (u8) sizeof(struct sadb_address),
322         [SADB_EXT_ADDRESS_PROXY]        = (u8) sizeof(struct sadb_address),
323         [SADB_EXT_KEY_AUTH]             = (u8) sizeof(struct sadb_key),
324         [SADB_EXT_KEY_ENCRYPT]          = (u8) sizeof(struct sadb_key),
325         [SADB_EXT_IDENTITY_SRC]         = (u8) sizeof(struct sadb_ident),
326         [SADB_EXT_IDENTITY_DST]         = (u8) sizeof(struct sadb_ident),
327         [SADB_EXT_SENSITIVITY]          = (u8) sizeof(struct sadb_sens),
328         [SADB_EXT_PROPOSAL]             = (u8) sizeof(struct sadb_prop),
329         [SADB_EXT_SUPPORTED_AUTH]       = (u8) sizeof(struct sadb_supported),
330         [SADB_EXT_SUPPORTED_ENCRYPT]    = (u8) sizeof(struct sadb_supported),
331         [SADB_EXT_SPIRANGE]             = (u8) sizeof(struct sadb_spirange),
332         [SADB_X_EXT_KMPRIVATE]          = (u8) sizeof(struct sadb_x_kmprivate),
333         [SADB_X_EXT_POLICY]             = (u8) sizeof(struct sadb_x_policy),
334         [SADB_X_EXT_SA2]                = (u8) sizeof(struct sadb_x_sa2),
335         [SADB_X_EXT_NAT_T_TYPE]         = (u8) sizeof(struct sadb_x_nat_t_type),
336         [SADB_X_EXT_NAT_T_SPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
337         [SADB_X_EXT_NAT_T_DPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
338         [SADB_X_EXT_NAT_T_OA]           = (u8) sizeof(struct sadb_address),
339         [SADB_X_EXT_SEC_CTX]            = (u8) sizeof(struct sadb_x_sec_ctx),
340 };
341
342 /* Verify sadb_address_{len,prefixlen} against sa_family.  */
343 static int verify_address_len(void *p)
344 {
345         struct sadb_address *sp = p;
346         struct sockaddr *addr = (struct sockaddr *)(sp + 1);
347         struct sockaddr_in *sin;
348 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
349         struct sockaddr_in6 *sin6;
350 #endif
351         int len;
352
353         switch (addr->sa_family) {
354         case AF_INET:
355                 len  = sizeof(*sp) + sizeof(*sin) + (sizeof(uint64_t) - 1);
356                 len /= sizeof(uint64_t);
357                 if (sp->sadb_address_len != len ||
358                     sp->sadb_address_prefixlen > 32)
359                         return -EINVAL;
360                 break;
361 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
362         case AF_INET6:
363                 len  = sizeof(*sp) + sizeof(*sin6) + (sizeof(uint64_t) - 1);
364                 len /= sizeof(uint64_t);
365                 if (sp->sadb_address_len != len ||
366                     sp->sadb_address_prefixlen > 128)
367                         return -EINVAL;
368                 break;
369 #endif
370         default:
371                 /* It is user using kernel to keep track of security
372                  * associations for another protocol, such as
373                  * OSPF/RSVP/RIPV2/MIP.  It is user's job to verify
374                  * lengths.
375                  *
376                  * XXX Actually, association/policy database is not yet
377                  * XXX able to cope with arbitrary sockaddr families.
378                  * XXX When it can, remove this -EINVAL.  -DaveM
379                  */
380                 return -EINVAL;
381                 break;
382         };
383
384         return 0;
385 }
386
387 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
388 {
389         int len = 0;
390
391         len += sizeof(struct sadb_x_sec_ctx);
392         len += sec_ctx->sadb_x_ctx_len;
393         len += sizeof(uint64_t) - 1;
394         len /= sizeof(uint64_t);
395
396         return len;
397 }
398
399 static inline int verify_sec_ctx_len(void *p)
400 {
401         struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
402         int len;
403
404         if (sec_ctx->sadb_x_ctx_len > PAGE_SIZE)
405                 return -EINVAL;
406
407         len = pfkey_sec_ctx_len(sec_ctx);
408
409         if (sec_ctx->sadb_x_sec_len != len)
410                 return -EINVAL;
411
412         return 0;
413 }
414
415 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
416 {
417         struct xfrm_user_sec_ctx *uctx = NULL;
418         int ctx_size = sec_ctx->sadb_x_ctx_len;
419
420         uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
421
422         if (!uctx)
423                 return NULL;
424
425         uctx->len = pfkey_sec_ctx_len(sec_ctx);
426         uctx->exttype = sec_ctx->sadb_x_sec_exttype;
427         uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
428         uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
429         uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
430         memcpy(uctx + 1, sec_ctx + 1,
431                uctx->ctx_len);
432
433         return uctx;
434 }
435
436 static int present_and_same_family(struct sadb_address *src,
437                                    struct sadb_address *dst)
438 {
439         struct sockaddr *s_addr, *d_addr;
440
441         if (!src || !dst)
442                 return 0;
443
444         s_addr = (struct sockaddr *)(src + 1);
445         d_addr = (struct sockaddr *)(dst + 1);
446         if (s_addr->sa_family != d_addr->sa_family)
447                 return 0;
448         if (s_addr->sa_family != AF_INET
449 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
450             && s_addr->sa_family != AF_INET6
451 #endif
452                 )
453                 return 0;
454
455         return 1;
456 }
457
458 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
459 {
460         char *p = (char *) hdr;
461         int len = skb->len;
462
463         len -= sizeof(*hdr);
464         p += sizeof(*hdr);
465         while (len > 0) {
466                 struct sadb_ext *ehdr = (struct sadb_ext *) p;
467                 uint16_t ext_type;
468                 int ext_len;
469
470                 ext_len  = ehdr->sadb_ext_len;
471                 ext_len *= sizeof(uint64_t);
472                 ext_type = ehdr->sadb_ext_type;
473                 if (ext_len < sizeof(uint64_t) ||
474                     ext_len > len ||
475                     ext_type == SADB_EXT_RESERVED)
476                         return -EINVAL;
477
478                 if (ext_type <= SADB_EXT_MAX) {
479                         int min = (int) sadb_ext_min_len[ext_type];
480                         if (ext_len < min)
481                                 return -EINVAL;
482                         if (ext_hdrs[ext_type-1] != NULL)
483                                 return -EINVAL;
484                         if (ext_type == SADB_EXT_ADDRESS_SRC ||
485                             ext_type == SADB_EXT_ADDRESS_DST ||
486                             ext_type == SADB_EXT_ADDRESS_PROXY ||
487                             ext_type == SADB_X_EXT_NAT_T_OA) {
488                                 if (verify_address_len(p))
489                                         return -EINVAL;
490                         }
491                         if (ext_type == SADB_X_EXT_SEC_CTX) {
492                                 if (verify_sec_ctx_len(p))
493                                         return -EINVAL;
494                         }
495                         ext_hdrs[ext_type-1] = p;
496                 }
497                 p   += ext_len;
498                 len -= ext_len;
499         }
500
501         return 0;
502 }
503
504 static uint16_t
505 pfkey_satype2proto(uint8_t satype)
506 {
507         switch (satype) {
508         case SADB_SATYPE_UNSPEC:
509                 return IPSEC_PROTO_ANY;
510         case SADB_SATYPE_AH:
511                 return IPPROTO_AH;
512         case SADB_SATYPE_ESP:
513                 return IPPROTO_ESP;
514         case SADB_X_SATYPE_IPCOMP:
515                 return IPPROTO_COMP;
516                 break;
517         default:
518                 return 0;
519         }
520         /* NOTREACHED */
521 }
522
523 static uint8_t
524 pfkey_proto2satype(uint16_t proto)
525 {
526         switch (proto) {
527         case IPPROTO_AH:
528                 return SADB_SATYPE_AH;
529         case IPPROTO_ESP:
530                 return SADB_SATYPE_ESP;
531         case IPPROTO_COMP:
532                 return SADB_X_SATYPE_IPCOMP;
533                 break;
534         default:
535                 return 0;
536         }
537         /* NOTREACHED */
538 }
539
540 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
541  * say specifically 'just raw sockets' as we encode them as 255.
542  */
543
544 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
545 {
546         return (proto == IPSEC_PROTO_ANY ? 0 : proto);
547 }
548
549 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
550 {
551         return (proto ? proto : IPSEC_PROTO_ANY);
552 }
553
554 static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
555                                      xfrm_address_t *xaddr)
556 {
557         switch (((struct sockaddr*)(addr + 1))->sa_family) {
558         case AF_INET:
559                 xaddr->a4 =
560                         ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
561                 return AF_INET;
562 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
563         case AF_INET6:
564                 memcpy(xaddr->a6,
565                        &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
566                        sizeof(struct in6_addr));
567                 return AF_INET6;
568 #endif
569         default:
570                 return 0;
571         }
572         /* NOTREACHED */
573 }
574
575 static struct  xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
576 {
577         struct sadb_sa *sa;
578         struct sadb_address *addr;
579         uint16_t proto;
580         unsigned short family;
581         xfrm_address_t *xaddr;
582
583         sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
584         if (sa == NULL)
585                 return NULL;
586
587         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
588         if (proto == 0)
589                 return NULL;
590
591         /* sadb_address_len should be checked by caller */
592         addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
593         if (addr == NULL)
594                 return NULL;
595
596         family = ((struct sockaddr *)(addr + 1))->sa_family;
597         switch (family) {
598         case AF_INET:
599                 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
600                 break;
601 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
602         case AF_INET6:
603                 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
604                 break;
605 #endif
606         default:
607                 xaddr = NULL;
608         }
609
610         if (!xaddr)
611                 return NULL;
612
613         return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
614 }
615
616 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
617 static int
618 pfkey_sockaddr_size(sa_family_t family)
619 {
620         switch (family) {
621         case AF_INET:
622                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
623 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
624         case AF_INET6:
625                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
626 #endif
627         default:
628                 return 0;
629         }
630         /* NOTREACHED */
631 }
632
633 static inline int pfkey_mode_from_xfrm(int mode)
634 {
635         switch(mode) {
636         case XFRM_MODE_TRANSPORT:
637                 return IPSEC_MODE_TRANSPORT;
638         case XFRM_MODE_TUNNEL:
639                 return IPSEC_MODE_TUNNEL;
640         case XFRM_MODE_BEET:
641                 return IPSEC_MODE_BEET;
642         default:
643                 return -1;
644         }
645 }
646
647 static inline int pfkey_mode_to_xfrm(int mode)
648 {
649         switch(mode) {
650         case IPSEC_MODE_ANY:    /*XXX*/
651         case IPSEC_MODE_TRANSPORT:
652                 return XFRM_MODE_TRANSPORT;
653         case IPSEC_MODE_TUNNEL:
654                 return XFRM_MODE_TUNNEL;
655         case IPSEC_MODE_BEET:
656                 return XFRM_MODE_BEET;
657         default:
658                 return -1;
659         }
660 }
661
662 static struct sk_buff * pfkey_xfrm_state2msg(struct xfrm_state *x, int add_keys, int hsc)
663 {
664         struct sk_buff *skb;
665         struct sadb_msg *hdr;
666         struct sadb_sa *sa;
667         struct sadb_lifetime *lifetime;
668         struct sadb_address *addr;
669         struct sadb_key *key;
670         struct sadb_x_sa2 *sa2;
671         struct sockaddr_in *sin;
672         struct sadb_x_sec_ctx *sec_ctx;
673         struct xfrm_sec_ctx *xfrm_ctx;
674         int ctx_size = 0;
675 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
676         struct sockaddr_in6 *sin6;
677 #endif
678         int size;
679         int auth_key_size = 0;
680         int encrypt_key_size = 0;
681         int sockaddr_size;
682         struct xfrm_encap_tmpl *natt = NULL;
683         int mode;
684
685         /* address family check */
686         sockaddr_size = pfkey_sockaddr_size(x->props.family);
687         if (!sockaddr_size)
688                 return ERR_PTR(-EINVAL);
689
690         /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
691            key(AE), (identity(SD),) (sensitivity)> */
692         size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
693                 sizeof(struct sadb_lifetime) +
694                 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
695                 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
696                         sizeof(struct sadb_address)*2 +
697                                 sockaddr_size*2 +
698                                         sizeof(struct sadb_x_sa2);
699
700         if ((xfrm_ctx = x->security)) {
701                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
702                 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
703         }
704
705         /* identity & sensitivity */
706
707         if ((x->props.family == AF_INET &&
708              x->sel.saddr.a4 != x->props.saddr.a4)
709 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
710             || (x->props.family == AF_INET6 &&
711                 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
712 #endif
713                 )
714                 size += sizeof(struct sadb_address) + sockaddr_size;
715
716         if (add_keys) {
717                 if (x->aalg && x->aalg->alg_key_len) {
718                         auth_key_size =
719                                 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
720                         size += sizeof(struct sadb_key) + auth_key_size;
721                 }
722                 if (x->ealg && x->ealg->alg_key_len) {
723                         encrypt_key_size =
724                                 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
725                         size += sizeof(struct sadb_key) + encrypt_key_size;
726                 }
727         }
728         if (x->encap)
729                 natt = x->encap;
730
731         if (natt && natt->encap_type) {
732                 size += sizeof(struct sadb_x_nat_t_type);
733                 size += sizeof(struct sadb_x_nat_t_port);
734                 size += sizeof(struct sadb_x_nat_t_port);
735         }
736
737         skb =  alloc_skb(size + 16, GFP_ATOMIC);
738         if (skb == NULL)
739                 return ERR_PTR(-ENOBUFS);
740
741         /* call should fill header later */
742         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
743         memset(hdr, 0, size);   /* XXX do we need this ? */
744         hdr->sadb_msg_len = size / sizeof(uint64_t);
745
746         /* sa */
747         sa = (struct sadb_sa *)  skb_put(skb, sizeof(struct sadb_sa));
748         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
749         sa->sadb_sa_exttype = SADB_EXT_SA;
750         sa->sadb_sa_spi = x->id.spi;
751         sa->sadb_sa_replay = x->props.replay_window;
752         switch (x->km.state) {
753         case XFRM_STATE_VALID:
754                 sa->sadb_sa_state = x->km.dying ?
755                         SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
756                 break;
757         case XFRM_STATE_ACQ:
758                 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
759                 break;
760         default:
761                 sa->sadb_sa_state = SADB_SASTATE_DEAD;
762                 break;
763         }
764         sa->sadb_sa_auth = 0;
765         if (x->aalg) {
766                 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
767                 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
768         }
769         sa->sadb_sa_encrypt = 0;
770         BUG_ON(x->ealg && x->calg);
771         if (x->ealg) {
772                 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
773                 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
774         }
775         /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
776         if (x->calg) {
777                 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
778                 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
779         }
780
781         sa->sadb_sa_flags = 0;
782         if (x->props.flags & XFRM_STATE_NOECN)
783                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
784         if (x->props.flags & XFRM_STATE_DECAP_DSCP)
785                 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
786         if (x->props.flags & XFRM_STATE_NOPMTUDISC)
787                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
788
789         /* hard time */
790         if (hsc & 2) {
791                 lifetime = (struct sadb_lifetime *)  skb_put(skb,
792                                                              sizeof(struct sadb_lifetime));
793                 lifetime->sadb_lifetime_len =
794                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
795                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
796                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.hard_packet_limit);
797                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
798                 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
799                 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
800         }
801         /* soft time */
802         if (hsc & 1) {
803                 lifetime = (struct sadb_lifetime *)  skb_put(skb,
804                                                              sizeof(struct sadb_lifetime));
805                 lifetime->sadb_lifetime_len =
806                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
807                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
808                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.soft_packet_limit);
809                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
810                 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
811                 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
812         }
813         /* current time */
814         lifetime = (struct sadb_lifetime *)  skb_put(skb,
815                                                      sizeof(struct sadb_lifetime));
816         lifetime->sadb_lifetime_len =
817                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
818         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
819         lifetime->sadb_lifetime_allocations = x->curlft.packets;
820         lifetime->sadb_lifetime_bytes = x->curlft.bytes;
821         lifetime->sadb_lifetime_addtime = x->curlft.add_time;
822         lifetime->sadb_lifetime_usetime = x->curlft.use_time;
823         /* src address */
824         addr = (struct sadb_address*) skb_put(skb,
825                                               sizeof(struct sadb_address)+sockaddr_size);
826         addr->sadb_address_len =
827                 (sizeof(struct sadb_address)+sockaddr_size)/
828                         sizeof(uint64_t);
829         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
830         /* "if the ports are non-zero, then the sadb_address_proto field,
831            normally zero, MUST be filled in with the transport
832            protocol's number." - RFC2367 */
833         addr->sadb_address_proto = 0;
834         addr->sadb_address_reserved = 0;
835         if (x->props.family == AF_INET) {
836                 addr->sadb_address_prefixlen = 32;
837
838                 sin = (struct sockaddr_in *) (addr + 1);
839                 sin->sin_family = AF_INET;
840                 sin->sin_addr.s_addr = x->props.saddr.a4;
841                 sin->sin_port = 0;
842                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
843         }
844 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
845         else if (x->props.family == AF_INET6) {
846                 addr->sadb_address_prefixlen = 128;
847
848                 sin6 = (struct sockaddr_in6 *) (addr + 1);
849                 sin6->sin6_family = AF_INET6;
850                 sin6->sin6_port = 0;
851                 sin6->sin6_flowinfo = 0;
852                 memcpy(&sin6->sin6_addr, x->props.saddr.a6,
853                        sizeof(struct in6_addr));
854                 sin6->sin6_scope_id = 0;
855         }
856 #endif
857         else
858                 BUG();
859
860         /* dst address */
861         addr = (struct sadb_address*) skb_put(skb,
862                                               sizeof(struct sadb_address)+sockaddr_size);
863         addr->sadb_address_len =
864                 (sizeof(struct sadb_address)+sockaddr_size)/
865                         sizeof(uint64_t);
866         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
867         addr->sadb_address_proto = 0;
868         addr->sadb_address_prefixlen = 32; /* XXX */
869         addr->sadb_address_reserved = 0;
870         if (x->props.family == AF_INET) {
871                 sin = (struct sockaddr_in *) (addr + 1);
872                 sin->sin_family = AF_INET;
873                 sin->sin_addr.s_addr = x->id.daddr.a4;
874                 sin->sin_port = 0;
875                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
876
877                 if (x->sel.saddr.a4 != x->props.saddr.a4) {
878                         addr = (struct sadb_address*) skb_put(skb,
879                                 sizeof(struct sadb_address)+sockaddr_size);
880                         addr->sadb_address_len =
881                                 (sizeof(struct sadb_address)+sockaddr_size)/
882                                 sizeof(uint64_t);
883                         addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
884                         addr->sadb_address_proto =
885                                 pfkey_proto_from_xfrm(x->sel.proto);
886                         addr->sadb_address_prefixlen = x->sel.prefixlen_s;
887                         addr->sadb_address_reserved = 0;
888
889                         sin = (struct sockaddr_in *) (addr + 1);
890                         sin->sin_family = AF_INET;
891                         sin->sin_addr.s_addr = x->sel.saddr.a4;
892                         sin->sin_port = x->sel.sport;
893                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
894                 }
895         }
896 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
897         else if (x->props.family == AF_INET6) {
898                 addr->sadb_address_prefixlen = 128;
899
900                 sin6 = (struct sockaddr_in6 *) (addr + 1);
901                 sin6->sin6_family = AF_INET6;
902                 sin6->sin6_port = 0;
903                 sin6->sin6_flowinfo = 0;
904                 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
905                 sin6->sin6_scope_id = 0;
906
907                 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
908                             sizeof(struct in6_addr))) {
909                         addr = (struct sadb_address *) skb_put(skb,
910                                 sizeof(struct sadb_address)+sockaddr_size);
911                         addr->sadb_address_len =
912                                 (sizeof(struct sadb_address)+sockaddr_size)/
913                                 sizeof(uint64_t);
914                         addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
915                         addr->sadb_address_proto =
916                                 pfkey_proto_from_xfrm(x->sel.proto);
917                         addr->sadb_address_prefixlen = x->sel.prefixlen_s;
918                         addr->sadb_address_reserved = 0;
919
920                         sin6 = (struct sockaddr_in6 *) (addr + 1);
921                         sin6->sin6_family = AF_INET6;
922                         sin6->sin6_port = x->sel.sport;
923                         sin6->sin6_flowinfo = 0;
924                         memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
925                                sizeof(struct in6_addr));
926                         sin6->sin6_scope_id = 0;
927                 }
928         }
929 #endif
930         else
931                 BUG();
932
933         /* auth key */
934         if (add_keys && auth_key_size) {
935                 key = (struct sadb_key *) skb_put(skb,
936                                                   sizeof(struct sadb_key)+auth_key_size);
937                 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
938                         sizeof(uint64_t);
939                 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
940                 key->sadb_key_bits = x->aalg->alg_key_len;
941                 key->sadb_key_reserved = 0;
942                 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
943         }
944         /* encrypt key */
945         if (add_keys && encrypt_key_size) {
946                 key = (struct sadb_key *) skb_put(skb,
947                                                   sizeof(struct sadb_key)+encrypt_key_size);
948                 key->sadb_key_len = (sizeof(struct sadb_key) +
949                                      encrypt_key_size) / sizeof(uint64_t);
950                 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
951                 key->sadb_key_bits = x->ealg->alg_key_len;
952                 key->sadb_key_reserved = 0;
953                 memcpy(key + 1, x->ealg->alg_key,
954                        (x->ealg->alg_key_len+7)/8);
955         }
956
957         /* sa */
958         sa2 = (struct sadb_x_sa2 *)  skb_put(skb, sizeof(struct sadb_x_sa2));
959         sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
960         sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
961         if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
962                 kfree_skb(skb);
963                 return ERR_PTR(-EINVAL);
964         }
965         sa2->sadb_x_sa2_mode = mode;
966         sa2->sadb_x_sa2_reserved1 = 0;
967         sa2->sadb_x_sa2_reserved2 = 0;
968         sa2->sadb_x_sa2_sequence = 0;
969         sa2->sadb_x_sa2_reqid = x->props.reqid;
970
971         if (natt && natt->encap_type) {
972                 struct sadb_x_nat_t_type *n_type;
973                 struct sadb_x_nat_t_port *n_port;
974
975                 /* type */
976                 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
977                 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
978                 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
979                 n_type->sadb_x_nat_t_type_type = natt->encap_type;
980                 n_type->sadb_x_nat_t_type_reserved[0] = 0;
981                 n_type->sadb_x_nat_t_type_reserved[1] = 0;
982                 n_type->sadb_x_nat_t_type_reserved[2] = 0;
983
984                 /* source port */
985                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
986                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
987                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
988                 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
989                 n_port->sadb_x_nat_t_port_reserved = 0;
990
991                 /* dest port */
992                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
993                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
994                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
995                 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
996                 n_port->sadb_x_nat_t_port_reserved = 0;
997         }
998
999         /* security context */
1000         if (xfrm_ctx) {
1001                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
1002                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1003                 sec_ctx->sadb_x_sec_len =
1004                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1005                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1006                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1007                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1008                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1009                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1010                        xfrm_ctx->ctx_len);
1011         }
1012
1013         return skb;
1014 }
1015
1016 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1017                                                 void **ext_hdrs)
1018 {
1019         struct xfrm_state *x;
1020         struct sadb_lifetime *lifetime;
1021         struct sadb_sa *sa;
1022         struct sadb_key *key;
1023         struct sadb_x_sec_ctx *sec_ctx;
1024         uint16_t proto;
1025         int err;
1026
1027
1028         sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1029         if (!sa ||
1030             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1031                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1032                 return ERR_PTR(-EINVAL);
1033         if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1034             !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1035                 return ERR_PTR(-EINVAL);
1036         if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1037             !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1038                 return ERR_PTR(-EINVAL);
1039         if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1040             !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1041                 return ERR_PTR(-EINVAL);
1042
1043         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1044         if (proto == 0)
1045                 return ERR_PTR(-EINVAL);
1046
1047         /* default error is no buffer space */
1048         err = -ENOBUFS;
1049
1050         /* RFC2367:
1051
1052    Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1053    SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1054    sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1055    Therefore, the sadb_sa_state field of all submitted SAs MUST be
1056    SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1057    not true.
1058
1059            However, KAME setkey always uses SADB_SASTATE_LARVAL.
1060            Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1061          */
1062         if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1063             (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1064              sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1065             sa->sadb_sa_encrypt > SADB_EALG_MAX)
1066                 return ERR_PTR(-EINVAL);
1067         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1068         if (key != NULL &&
1069             sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1070             ((key->sadb_key_bits+7) / 8 == 0 ||
1071              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1072                 return ERR_PTR(-EINVAL);
1073         key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1074         if (key != NULL &&
1075             sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1076             ((key->sadb_key_bits+7) / 8 == 0 ||
1077              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1078                 return ERR_PTR(-EINVAL);
1079
1080         x = xfrm_state_alloc();
1081         if (x == NULL)
1082                 return ERR_PTR(-ENOBUFS);
1083
1084         x->id.proto = proto;
1085         x->id.spi = sa->sadb_sa_spi;
1086         x->props.replay_window = sa->sadb_sa_replay;
1087         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1088                 x->props.flags |= XFRM_STATE_NOECN;
1089         if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1090                 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1091         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1092                 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1093
1094         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1095         if (lifetime != NULL) {
1096                 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1097                 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1098                 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1099                 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1100         }
1101         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1102         if (lifetime != NULL) {
1103                 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1104                 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1105                 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1106                 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1107         }
1108
1109         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1110         if (sec_ctx != NULL) {
1111                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1112
1113                 if (!uctx)
1114                         goto out;
1115
1116                 err = security_xfrm_state_alloc(x, uctx);
1117                 kfree(uctx);
1118
1119                 if (err)
1120                         goto out;
1121         }
1122
1123         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1124         if (sa->sadb_sa_auth) {
1125                 int keysize = 0;
1126                 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1127                 if (!a) {
1128                         err = -ENOSYS;
1129                         goto out;
1130                 }
1131                 if (key)
1132                         keysize = (key->sadb_key_bits + 7) / 8;
1133                 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1134                 if (!x->aalg)
1135                         goto out;
1136                 strcpy(x->aalg->alg_name, a->name);
1137                 x->aalg->alg_key_len = 0;
1138                 if (key) {
1139                         x->aalg->alg_key_len = key->sadb_key_bits;
1140                         memcpy(x->aalg->alg_key, key+1, keysize);
1141                 }
1142                 x->props.aalgo = sa->sadb_sa_auth;
1143                 /* x->algo.flags = sa->sadb_sa_flags; */
1144         }
1145         if (sa->sadb_sa_encrypt) {
1146                 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1147                         struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1148                         if (!a) {
1149                                 err = -ENOSYS;
1150                                 goto out;
1151                         }
1152                         x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1153                         if (!x->calg)
1154                                 goto out;
1155                         strcpy(x->calg->alg_name, a->name);
1156                         x->props.calgo = sa->sadb_sa_encrypt;
1157                 } else {
1158                         int keysize = 0;
1159                         struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1160                         if (!a) {
1161                                 err = -ENOSYS;
1162                                 goto out;
1163                         }
1164                         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1165                         if (key)
1166                                 keysize = (key->sadb_key_bits + 7) / 8;
1167                         x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1168                         if (!x->ealg)
1169                                 goto out;
1170                         strcpy(x->ealg->alg_name, a->name);
1171                         x->ealg->alg_key_len = 0;
1172                         if (key) {
1173                                 x->ealg->alg_key_len = key->sadb_key_bits;
1174                                 memcpy(x->ealg->alg_key, key+1, keysize);
1175                         }
1176                         x->props.ealgo = sa->sadb_sa_encrypt;
1177                 }
1178         }
1179         /* x->algo.flags = sa->sadb_sa_flags; */
1180
1181         x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1182                                                     &x->props.saddr);
1183         if (!x->props.family) {
1184                 err = -EAFNOSUPPORT;
1185                 goto out;
1186         }
1187         pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1188                                   &x->id.daddr);
1189
1190         if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1191                 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1192                 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1193                 if (mode < 0) {
1194                         err = -EINVAL;
1195                         goto out;
1196                 }
1197                 x->props.mode = mode;
1198                 x->props.reqid = sa2->sadb_x_sa2_reqid;
1199         }
1200
1201         if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1202                 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1203
1204                 /* Nobody uses this, but we try. */
1205                 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1206                 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1207         }
1208
1209         if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1210                 struct sadb_x_nat_t_type* n_type;
1211                 struct xfrm_encap_tmpl *natt;
1212
1213                 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1214                 if (!x->encap)
1215                         goto out;
1216
1217                 natt = x->encap;
1218                 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1219                 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1220
1221                 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1222                         struct sadb_x_nat_t_port* n_port =
1223                                 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1224                         natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1225                 }
1226                 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1227                         struct sadb_x_nat_t_port* n_port =
1228                                 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1229                         natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1230                 }
1231         }
1232
1233         err = xfrm_init_state(x);
1234         if (err)
1235                 goto out;
1236
1237         x->km.seq = hdr->sadb_msg_seq;
1238         return x;
1239
1240 out:
1241         x->km.state = XFRM_STATE_DEAD;
1242         xfrm_state_put(x);
1243         return ERR_PTR(err);
1244 }
1245
1246 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1247 {
1248         return -EOPNOTSUPP;
1249 }
1250
1251 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1252 {
1253         struct sk_buff *resp_skb;
1254         struct sadb_x_sa2 *sa2;
1255         struct sadb_address *saddr, *daddr;
1256         struct sadb_msg *out_hdr;
1257         struct xfrm_state *x = NULL;
1258         int mode;
1259         u32 reqid;
1260         u8 proto;
1261         unsigned short family;
1262         xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1263
1264         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1265                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1266                 return -EINVAL;
1267
1268         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1269         if (proto == 0)
1270                 return -EINVAL;
1271
1272         if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1273                 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1274                 if (mode < 0)
1275                         return -EINVAL;
1276                 reqid = sa2->sadb_x_sa2_reqid;
1277         } else {
1278                 mode = 0;
1279                 reqid = 0;
1280         }
1281
1282         saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1283         daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1284
1285         family = ((struct sockaddr *)(saddr + 1))->sa_family;
1286         switch (family) {
1287         case AF_INET:
1288                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1289                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1290                 break;
1291 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1292         case AF_INET6:
1293                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1294                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1295                 break;
1296 #endif
1297         }
1298
1299         if (hdr->sadb_msg_seq) {
1300                 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1301                 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1302                         xfrm_state_put(x);
1303                         x = NULL;
1304                 }
1305         }
1306
1307         if (!x)
1308                 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1309
1310         if (x == NULL)
1311                 return -ENOENT;
1312
1313         resp_skb = ERR_PTR(-ENOENT);
1314
1315         spin_lock_bh(&x->lock);
1316         if (x->km.state != XFRM_STATE_DEAD) {
1317                 struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1318                 u32 min_spi, max_spi;
1319
1320                 if (range != NULL) {
1321                         min_spi = range->sadb_spirange_min;
1322                         max_spi = range->sadb_spirange_max;
1323                 } else {
1324                         min_spi = 0x100;
1325                         max_spi = 0x0fffffff;
1326                 }
1327                 xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi));
1328                 if (x->id.spi)
1329                         resp_skb = pfkey_xfrm_state2msg(x, 0, 3);
1330         }
1331         spin_unlock_bh(&x->lock);
1332
1333         if (IS_ERR(resp_skb)) {
1334                 xfrm_state_put(x);
1335                 return  PTR_ERR(resp_skb);
1336         }
1337
1338         out_hdr = (struct sadb_msg *) resp_skb->data;
1339         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1340         out_hdr->sadb_msg_type = SADB_GETSPI;
1341         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1342         out_hdr->sadb_msg_errno = 0;
1343         out_hdr->sadb_msg_reserved = 0;
1344         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1345         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1346
1347         xfrm_state_put(x);
1348
1349         pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1350
1351         return 0;
1352 }
1353
1354 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1355 {
1356         struct xfrm_state *x;
1357
1358         if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1359                 return -EOPNOTSUPP;
1360
1361         if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1362                 return 0;
1363
1364         x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1365         if (x == NULL)
1366                 return 0;
1367
1368         spin_lock_bh(&x->lock);
1369         if (x->km.state == XFRM_STATE_ACQ) {
1370                 x->km.state = XFRM_STATE_ERROR;
1371                 wake_up(&km_waitq);
1372         }
1373         spin_unlock_bh(&x->lock);
1374         xfrm_state_put(x);
1375         return 0;
1376 }
1377
1378 static inline int event2poltype(int event)
1379 {
1380         switch (event) {
1381         case XFRM_MSG_DELPOLICY:
1382                 return SADB_X_SPDDELETE;
1383         case XFRM_MSG_NEWPOLICY:
1384                 return SADB_X_SPDADD;
1385         case XFRM_MSG_UPDPOLICY:
1386                 return SADB_X_SPDUPDATE;
1387         case XFRM_MSG_POLEXPIRE:
1388         //      return SADB_X_SPDEXPIRE;
1389         default:
1390                 printk("pfkey: Unknown policy event %d\n", event);
1391                 break;
1392         }
1393
1394         return 0;
1395 }
1396
1397 static inline int event2keytype(int event)
1398 {
1399         switch (event) {
1400         case XFRM_MSG_DELSA:
1401                 return SADB_DELETE;
1402         case XFRM_MSG_NEWSA:
1403                 return SADB_ADD;
1404         case XFRM_MSG_UPDSA:
1405                 return SADB_UPDATE;
1406         case XFRM_MSG_EXPIRE:
1407                 return SADB_EXPIRE;
1408         default:
1409                 printk("pfkey: Unknown SA event %d\n", event);
1410                 break;
1411         }
1412
1413         return 0;
1414 }
1415
1416 /* ADD/UPD/DEL */
1417 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1418 {
1419         struct sk_buff *skb;
1420         struct sadb_msg *hdr;
1421         int hsc = 3;
1422
1423         if (c->event == XFRM_MSG_DELSA)
1424                 hsc = 0;
1425
1426         skb = pfkey_xfrm_state2msg(x, 0, hsc);
1427
1428         if (IS_ERR(skb))
1429                 return PTR_ERR(skb);
1430
1431         hdr = (struct sadb_msg *) skb->data;
1432         hdr->sadb_msg_version = PF_KEY_V2;
1433         hdr->sadb_msg_type = event2keytype(c->event);
1434         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1435         hdr->sadb_msg_errno = 0;
1436         hdr->sadb_msg_reserved = 0;
1437         hdr->sadb_msg_seq = c->seq;
1438         hdr->sadb_msg_pid = c->pid;
1439
1440         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1441
1442         return 0;
1443 }
1444
1445 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1446 {
1447         struct xfrm_state *x;
1448         int err;
1449         struct km_event c;
1450
1451         xfrm_probe_algs();
1452
1453         x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1454         if (IS_ERR(x))
1455                 return PTR_ERR(x);
1456
1457         xfrm_state_hold(x);
1458         if (hdr->sadb_msg_type == SADB_ADD)
1459                 err = xfrm_state_add(x);
1460         else
1461                 err = xfrm_state_update(x);
1462
1463         xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
1464                        AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x);
1465
1466         if (err < 0) {
1467                 x->km.state = XFRM_STATE_DEAD;
1468                 __xfrm_state_put(x);
1469                 goto out;
1470         }
1471
1472         if (hdr->sadb_msg_type == SADB_ADD)
1473                 c.event = XFRM_MSG_NEWSA;
1474         else
1475                 c.event = XFRM_MSG_UPDSA;
1476         c.seq = hdr->sadb_msg_seq;
1477         c.pid = hdr->sadb_msg_pid;
1478         km_state_notify(x, &c);
1479 out:
1480         xfrm_state_put(x);
1481         return err;
1482 }
1483
1484 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1485 {
1486         struct xfrm_state *x;
1487         struct km_event c;
1488         int err;
1489
1490         if (!ext_hdrs[SADB_EXT_SA-1] ||
1491             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1492                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1493                 return -EINVAL;
1494
1495         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1496         if (x == NULL)
1497                 return -ESRCH;
1498
1499         if ((err = security_xfrm_state_delete(x)))
1500                 goto out;
1501
1502         if (xfrm_state_kern(x)) {
1503                 err = -EPERM;
1504                 goto out;
1505         }
1506
1507         err = xfrm_state_delete(x);
1508
1509         if (err < 0)
1510                 goto out;
1511
1512         c.seq = hdr->sadb_msg_seq;
1513         c.pid = hdr->sadb_msg_pid;
1514         c.event = XFRM_MSG_DELSA;
1515         km_state_notify(x, &c);
1516 out:
1517         xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
1518                        AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x);
1519         xfrm_state_put(x);
1520
1521         return err;
1522 }
1523
1524 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1525 {
1526         __u8 proto;
1527         struct sk_buff *out_skb;
1528         struct sadb_msg *out_hdr;
1529         struct xfrm_state *x;
1530
1531         if (!ext_hdrs[SADB_EXT_SA-1] ||
1532             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1533                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1534                 return -EINVAL;
1535
1536         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1537         if (x == NULL)
1538                 return -ESRCH;
1539
1540         out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1541         proto = x->id.proto;
1542         xfrm_state_put(x);
1543         if (IS_ERR(out_skb))
1544                 return  PTR_ERR(out_skb);
1545
1546         out_hdr = (struct sadb_msg *) out_skb->data;
1547         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1548         out_hdr->sadb_msg_type = SADB_DUMP;
1549         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1550         out_hdr->sadb_msg_errno = 0;
1551         out_hdr->sadb_msg_reserved = 0;
1552         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1553         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1554         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1555
1556         return 0;
1557 }
1558
1559 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1560                                               gfp_t allocation)
1561 {
1562         struct sk_buff *skb;
1563         struct sadb_msg *hdr;
1564         int len, auth_len, enc_len, i;
1565
1566         auth_len = xfrm_count_auth_supported();
1567         if (auth_len) {
1568                 auth_len *= sizeof(struct sadb_alg);
1569                 auth_len += sizeof(struct sadb_supported);
1570         }
1571
1572         enc_len = xfrm_count_enc_supported();
1573         if (enc_len) {
1574                 enc_len *= sizeof(struct sadb_alg);
1575                 enc_len += sizeof(struct sadb_supported);
1576         }
1577
1578         len = enc_len + auth_len + sizeof(struct sadb_msg);
1579
1580         skb = alloc_skb(len + 16, allocation);
1581         if (!skb)
1582                 goto out_put_algs;
1583
1584         hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1585         pfkey_hdr_dup(hdr, orig);
1586         hdr->sadb_msg_errno = 0;
1587         hdr->sadb_msg_len = len / sizeof(uint64_t);
1588
1589         if (auth_len) {
1590                 struct sadb_supported *sp;
1591                 struct sadb_alg *ap;
1592
1593                 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1594                 ap = (struct sadb_alg *) (sp + 1);
1595
1596                 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1597                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1598
1599                 for (i = 0; ; i++) {
1600                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1601                         if (!aalg)
1602                                 break;
1603                         if (aalg->available)
1604                                 *ap++ = aalg->desc;
1605                 }
1606         }
1607
1608         if (enc_len) {
1609                 struct sadb_supported *sp;
1610                 struct sadb_alg *ap;
1611
1612                 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1613                 ap = (struct sadb_alg *) (sp + 1);
1614
1615                 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1616                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1617
1618                 for (i = 0; ; i++) {
1619                         struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1620                         if (!ealg)
1621                                 break;
1622                         if (ealg->available)
1623                                 *ap++ = ealg->desc;
1624                 }
1625         }
1626
1627 out_put_algs:
1628         return skb;
1629 }
1630
1631 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1632 {
1633         struct pfkey_sock *pfk = pfkey_sk(sk);
1634         struct sk_buff *supp_skb;
1635
1636         if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1637                 return -EINVAL;
1638
1639         if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1640                 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1641                         return -EEXIST;
1642                 pfk->registered |= (1<<hdr->sadb_msg_satype);
1643         }
1644
1645         xfrm_probe_algs();
1646
1647         supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1648         if (!supp_skb) {
1649                 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1650                         pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1651
1652                 return -ENOBUFS;
1653         }
1654
1655         pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1656
1657         return 0;
1658 }
1659
1660 static int key_notify_sa_flush(struct km_event *c)
1661 {
1662         struct sk_buff *skb;
1663         struct sadb_msg *hdr;
1664
1665         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1666         if (!skb)
1667                 return -ENOBUFS;
1668         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1669         hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1670         hdr->sadb_msg_type = SADB_FLUSH;
1671         hdr->sadb_msg_seq = c->seq;
1672         hdr->sadb_msg_pid = c->pid;
1673         hdr->sadb_msg_version = PF_KEY_V2;
1674         hdr->sadb_msg_errno = (uint8_t) 0;
1675         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1676
1677         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1678
1679         return 0;
1680 }
1681
1682 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1683 {
1684         unsigned proto;
1685         struct km_event c;
1686         struct xfrm_audit audit_info;
1687
1688         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1689         if (proto == 0)
1690                 return -EINVAL;
1691
1692         audit_info.loginuid = audit_get_loginuid(current->audit_context);
1693         audit_info.secid = 0;
1694         xfrm_state_flush(proto, &audit_info);
1695         c.data.proto = proto;
1696         c.seq = hdr->sadb_msg_seq;
1697         c.pid = hdr->sadb_msg_pid;
1698         c.event = XFRM_MSG_FLUSHSA;
1699         km_state_notify(NULL, &c);
1700
1701         return 0;
1702 }
1703
1704 struct pfkey_dump_data
1705 {
1706         struct sk_buff *skb;
1707         struct sadb_msg *hdr;
1708         struct sock *sk;
1709 };
1710
1711 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1712 {
1713         struct pfkey_dump_data *data = ptr;
1714         struct sk_buff *out_skb;
1715         struct sadb_msg *out_hdr;
1716
1717         out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1718         if (IS_ERR(out_skb))
1719                 return PTR_ERR(out_skb);
1720
1721         out_hdr = (struct sadb_msg *) out_skb->data;
1722         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1723         out_hdr->sadb_msg_type = SADB_DUMP;
1724         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1725         out_hdr->sadb_msg_errno = 0;
1726         out_hdr->sadb_msg_reserved = 0;
1727         out_hdr->sadb_msg_seq = count;
1728         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1729         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1730         return 0;
1731 }
1732
1733 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1734 {
1735         u8 proto;
1736         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1737
1738         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1739         if (proto == 0)
1740                 return -EINVAL;
1741
1742         return xfrm_state_walk(proto, dump_sa, &data);
1743 }
1744
1745 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1746 {
1747         struct pfkey_sock *pfk = pfkey_sk(sk);
1748         int satype = hdr->sadb_msg_satype;
1749
1750         if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1751                 /* XXX we mangle packet... */
1752                 hdr->sadb_msg_errno = 0;
1753                 if (satype != 0 && satype != 1)
1754                         return -EINVAL;
1755                 pfk->promisc = satype;
1756         }
1757         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1758         return 0;
1759 }
1760
1761 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1762 {
1763         int i;
1764         u32 reqid = *(u32*)ptr;
1765
1766         for (i=0; i<xp->xfrm_nr; i++) {
1767                 if (xp->xfrm_vec[i].reqid == reqid)
1768                         return -EEXIST;
1769         }
1770         return 0;
1771 }
1772
1773 static u32 gen_reqid(void)
1774 {
1775         u32 start;
1776         static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1777
1778         start = reqid;
1779         do {
1780                 ++reqid;
1781                 if (reqid == 0)
1782                         reqid = IPSEC_MANUAL_REQID_MAX+1;
1783                 if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid,
1784                                      (void*)&reqid) != -EEXIST)
1785                         return reqid;
1786         } while (reqid != start);
1787         return 0;
1788 }
1789
1790 static int
1791 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1792 {
1793         struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1794         struct sockaddr_in *sin;
1795 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1796         struct sockaddr_in6 *sin6;
1797 #endif
1798         int mode;
1799
1800         if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1801                 return -ELOOP;
1802
1803         if (rq->sadb_x_ipsecrequest_mode == 0)
1804                 return -EINVAL;
1805
1806         t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1807         if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1808                 return -EINVAL;
1809         t->mode = mode;
1810         if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1811                 t->optional = 1;
1812         else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1813                 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1814                 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1815                         t->reqid = 0;
1816                 if (!t->reqid && !(t->reqid = gen_reqid()))
1817                         return -ENOBUFS;
1818         }
1819
1820         /* addresses present only in tunnel mode */
1821         if (t->mode == XFRM_MODE_TUNNEL) {
1822                 struct sockaddr *sa;
1823                 sa = (struct sockaddr *)(rq+1);
1824                 switch(sa->sa_family) {
1825                 case AF_INET:
1826                         sin = (struct sockaddr_in*)sa;
1827                         t->saddr.a4 = sin->sin_addr.s_addr;
1828                         sin++;
1829                         if (sin->sin_family != AF_INET)
1830                                 return -EINVAL;
1831                         t->id.daddr.a4 = sin->sin_addr.s_addr;
1832                         break;
1833 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1834                 case AF_INET6:
1835                         sin6 = (struct sockaddr_in6*)sa;
1836                         memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1837                         sin6++;
1838                         if (sin6->sin6_family != AF_INET6)
1839                                 return -EINVAL;
1840                         memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1841                         break;
1842 #endif
1843                 default:
1844                         return -EINVAL;
1845                 }
1846                 t->encap_family = sa->sa_family;
1847         } else
1848                 t->encap_family = xp->family;
1849
1850         /* No way to set this via kame pfkey */
1851         t->aalgos = t->ealgos = t->calgos = ~0;
1852         xp->xfrm_nr++;
1853         return 0;
1854 }
1855
1856 static int
1857 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1858 {
1859         int err;
1860         int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1861         struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1862
1863         while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1864                 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1865                         return err;
1866                 len -= rq->sadb_x_ipsecrequest_len;
1867                 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1868         }
1869         return 0;
1870 }
1871
1872 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1873 {
1874   struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1875
1876         if (xfrm_ctx) {
1877                 int len = sizeof(struct sadb_x_sec_ctx);
1878                 len += xfrm_ctx->ctx_len;
1879                 return PFKEY_ALIGN8(len);
1880         }
1881         return 0;
1882 }
1883
1884 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1885 {
1886         struct xfrm_tmpl *t;
1887         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1888         int socklen = 0;
1889         int i;
1890
1891         for (i=0; i<xp->xfrm_nr; i++) {
1892                 t = xp->xfrm_vec + i;
1893                 socklen += (t->encap_family == AF_INET ?
1894                             sizeof(struct sockaddr_in) :
1895                             sizeof(struct sockaddr_in6));
1896         }
1897
1898         return sizeof(struct sadb_msg) +
1899                 (sizeof(struct sadb_lifetime) * 3) +
1900                 (sizeof(struct sadb_address) * 2) +
1901                 (sockaddr_size * 2) +
1902                 sizeof(struct sadb_x_policy) +
1903                 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1904                 (socklen * 2) +
1905                 pfkey_xfrm_policy2sec_ctx_size(xp);
1906 }
1907
1908 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1909 {
1910         struct sk_buff *skb;
1911         int size;
1912
1913         size = pfkey_xfrm_policy2msg_size(xp);
1914
1915         skb =  alloc_skb(size + 16, GFP_ATOMIC);
1916         if (skb == NULL)
1917                 return ERR_PTR(-ENOBUFS);
1918
1919         return skb;
1920 }
1921
1922 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1923 {
1924         struct sadb_msg *hdr;
1925         struct sadb_address *addr;
1926         struct sadb_lifetime *lifetime;
1927         struct sadb_x_policy *pol;
1928         struct sockaddr_in   *sin;
1929         struct sadb_x_sec_ctx *sec_ctx;
1930         struct xfrm_sec_ctx *xfrm_ctx;
1931 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1932         struct sockaddr_in6  *sin6;
1933 #endif
1934         int i;
1935         int size;
1936         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1937         int socklen = (xp->family == AF_INET ?
1938                        sizeof(struct sockaddr_in) :
1939                        sizeof(struct sockaddr_in6));
1940
1941         size = pfkey_xfrm_policy2msg_size(xp);
1942
1943         /* call should fill header later */
1944         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1945         memset(hdr, 0, size);   /* XXX do we need this ? */
1946
1947         /* src address */
1948         addr = (struct sadb_address*) skb_put(skb,
1949                                               sizeof(struct sadb_address)+sockaddr_size);
1950         addr->sadb_address_len =
1951                 (sizeof(struct sadb_address)+sockaddr_size)/
1952                         sizeof(uint64_t);
1953         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1954         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1955         addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1956         addr->sadb_address_reserved = 0;
1957         /* src address */
1958         if (xp->family == AF_INET) {
1959                 sin = (struct sockaddr_in *) (addr + 1);
1960                 sin->sin_family = AF_INET;
1961                 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1962                 sin->sin_port = xp->selector.sport;
1963                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1964         }
1965 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1966         else if (xp->family == AF_INET6) {
1967                 sin6 = (struct sockaddr_in6 *) (addr + 1);
1968                 sin6->sin6_family = AF_INET6;
1969                 sin6->sin6_port = xp->selector.sport;
1970                 sin6->sin6_flowinfo = 0;
1971                 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1972                        sizeof(struct in6_addr));
1973                 sin6->sin6_scope_id = 0;
1974         }
1975 #endif
1976         else
1977                 BUG();
1978
1979         /* dst address */
1980         addr = (struct sadb_address*) skb_put(skb,
1981                                               sizeof(struct sadb_address)+sockaddr_size);
1982         addr->sadb_address_len =
1983                 (sizeof(struct sadb_address)+sockaddr_size)/
1984                         sizeof(uint64_t);
1985         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1986         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1987         addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1988         addr->sadb_address_reserved = 0;
1989         if (xp->family == AF_INET) {
1990                 sin = (struct sockaddr_in *) (addr + 1);
1991                 sin->sin_family = AF_INET;
1992                 sin->sin_addr.s_addr = xp->selector.daddr.a4;
1993                 sin->sin_port = xp->selector.dport;
1994                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1995         }
1996 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1997         else if (xp->family == AF_INET6) {
1998                 sin6 = (struct sockaddr_in6 *) (addr + 1);
1999                 sin6->sin6_family = AF_INET6;
2000                 sin6->sin6_port = xp->selector.dport;
2001                 sin6->sin6_flowinfo = 0;
2002                 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2003                        sizeof(struct in6_addr));
2004                 sin6->sin6_scope_id = 0;
2005         }
2006 #endif
2007         else
2008                 BUG();
2009
2010         /* hard time */
2011         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2012                                                      sizeof(struct sadb_lifetime));
2013         lifetime->sadb_lifetime_len =
2014                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2015         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2016         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.hard_packet_limit);
2017         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2018         lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2019         lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2020         /* soft time */
2021         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2022                                                      sizeof(struct sadb_lifetime));
2023         lifetime->sadb_lifetime_len =
2024                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2025         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2026         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.soft_packet_limit);
2027         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2028         lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2029         lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2030         /* current time */
2031         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2032                                                      sizeof(struct sadb_lifetime));
2033         lifetime->sadb_lifetime_len =
2034                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2035         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2036         lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2037         lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2038         lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2039         lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2040
2041         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
2042         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2043         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2044         pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2045         if (xp->action == XFRM_POLICY_ALLOW) {
2046                 if (xp->xfrm_nr)
2047                         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2048                 else
2049                         pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2050         }
2051         pol->sadb_x_policy_dir = dir+1;
2052         pol->sadb_x_policy_id = xp->index;
2053         pol->sadb_x_policy_priority = xp->priority;
2054
2055         for (i=0; i<xp->xfrm_nr; i++) {
2056                 struct sadb_x_ipsecrequest *rq;
2057                 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2058                 int req_size;
2059                 int mode;
2060
2061                 req_size = sizeof(struct sadb_x_ipsecrequest);
2062                 if (t->mode == XFRM_MODE_TUNNEL)
2063                         req_size += ((t->encap_family == AF_INET ?
2064                                      sizeof(struct sockaddr_in) :
2065                                      sizeof(struct sockaddr_in6)) * 2);
2066                 else
2067                         size -= 2*socklen;
2068                 rq = (void*)skb_put(skb, req_size);
2069                 pol->sadb_x_policy_len += req_size/8;
2070                 memset(rq, 0, sizeof(*rq));
2071                 rq->sadb_x_ipsecrequest_len = req_size;
2072                 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2073                 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2074                         return -EINVAL;
2075                 rq->sadb_x_ipsecrequest_mode = mode;
2076                 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2077                 if (t->reqid)
2078                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2079                 if (t->optional)
2080                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2081                 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2082                 if (t->mode == XFRM_MODE_TUNNEL) {
2083                         switch (t->encap_family) {
2084                         case AF_INET:
2085                                 sin = (void*)(rq+1);
2086                                 sin->sin_family = AF_INET;
2087                                 sin->sin_addr.s_addr = t->saddr.a4;
2088                                 sin->sin_port = 0;
2089                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2090                                 sin++;
2091                                 sin->sin_family = AF_INET;
2092                                 sin->sin_addr.s_addr = t->id.daddr.a4;
2093                                 sin->sin_port = 0;
2094                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2095                                 break;
2096 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2097                         case AF_INET6:
2098                                 sin6 = (void*)(rq+1);
2099                                 sin6->sin6_family = AF_INET6;
2100                                 sin6->sin6_port = 0;
2101                                 sin6->sin6_flowinfo = 0;
2102                                 memcpy(&sin6->sin6_addr, t->saddr.a6,
2103                                        sizeof(struct in6_addr));
2104                                 sin6->sin6_scope_id = 0;
2105
2106                                 sin6++;
2107                                 sin6->sin6_family = AF_INET6;
2108                                 sin6->sin6_port = 0;
2109                                 sin6->sin6_flowinfo = 0;
2110                                 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2111                                        sizeof(struct in6_addr));
2112                                 sin6->sin6_scope_id = 0;
2113                                 break;
2114 #endif
2115                         default:
2116                                 break;
2117                         }
2118                 }
2119         }
2120
2121         /* security context */
2122         if ((xfrm_ctx = xp->security)) {
2123                 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2124
2125                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2126                 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2127                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2128                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2129                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2130                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2131                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2132                        xfrm_ctx->ctx_len);
2133         }
2134
2135         hdr->sadb_msg_len = size / sizeof(uint64_t);
2136         hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2137
2138         return 0;
2139 }
2140
2141 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2142 {
2143         struct sk_buff *out_skb;
2144         struct sadb_msg *out_hdr;
2145         int err;
2146
2147         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2148         if (IS_ERR(out_skb)) {
2149                 err = PTR_ERR(out_skb);
2150                 goto out;
2151         }
2152         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2153         if (err < 0)
2154                 return err;
2155
2156         out_hdr = (struct sadb_msg *) out_skb->data;
2157         out_hdr->sadb_msg_version = PF_KEY_V2;
2158
2159         if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2160                 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2161         else
2162                 out_hdr->sadb_msg_type = event2poltype(c->event);
2163         out_hdr->sadb_msg_errno = 0;
2164         out_hdr->sadb_msg_seq = c->seq;
2165         out_hdr->sadb_msg_pid = c->pid;
2166         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2167 out:
2168         return 0;
2169
2170 }
2171
2172 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2173 {
2174         int err = 0;
2175         struct sadb_lifetime *lifetime;
2176         struct sadb_address *sa;
2177         struct sadb_x_policy *pol;
2178         struct xfrm_policy *xp;
2179         struct km_event c;
2180         struct sadb_x_sec_ctx *sec_ctx;
2181
2182         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2183                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2184             !ext_hdrs[SADB_X_EXT_POLICY-1])
2185                 return -EINVAL;
2186
2187         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2188         if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2189                 return -EINVAL;
2190         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2191                 return -EINVAL;
2192
2193         xp = xfrm_policy_alloc(GFP_KERNEL);
2194         if (xp == NULL)
2195                 return -ENOBUFS;
2196
2197         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2198                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2199         xp->priority = pol->sadb_x_policy_priority;
2200
2201         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2202         xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2203         if (!xp->family) {
2204                 err = -EINVAL;
2205                 goto out;
2206         }
2207         xp->selector.family = xp->family;
2208         xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2209         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2210         xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2211         if (xp->selector.sport)
2212                 xp->selector.sport_mask = htons(0xffff);
2213
2214         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2215         pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2216         xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2217
2218         /* Amusing, we set this twice.  KAME apps appear to set same value
2219          * in both addresses.
2220          */
2221         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2222
2223         xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2224         if (xp->selector.dport)
2225                 xp->selector.dport_mask = htons(0xffff);
2226
2227         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2228         if (sec_ctx != NULL) {
2229                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2230
2231                 if (!uctx) {
2232                         err = -ENOBUFS;
2233                         goto out;
2234                 }
2235
2236                 err = security_xfrm_policy_alloc(xp, uctx);
2237                 kfree(uctx);
2238
2239                 if (err)
2240                         goto out;
2241         }
2242
2243         xp->lft.soft_byte_limit = XFRM_INF;
2244         xp->lft.hard_byte_limit = XFRM_INF;
2245         xp->lft.soft_packet_limit = XFRM_INF;
2246         xp->lft.hard_packet_limit = XFRM_INF;
2247         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2248                 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2249                 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2250                 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2251                 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2252         }
2253         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2254                 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2255                 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2256                 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2257                 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2258         }
2259         xp->xfrm_nr = 0;
2260         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2261             (err = parse_ipsecrequests(xp, pol)) < 0)
2262                 goto out;
2263
2264         err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2265                                  hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2266
2267         xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2268                        AUDIT_MAC_IPSEC_ADDSPD, err ? 0 : 1, xp, NULL);
2269
2270         if (err)
2271                 goto out;
2272
2273         if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2274                 c.event = XFRM_MSG_UPDPOLICY;
2275         else
2276                 c.event = XFRM_MSG_NEWPOLICY;
2277
2278         c.seq = hdr->sadb_msg_seq;
2279         c.pid = hdr->sadb_msg_pid;
2280
2281         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2282         xfrm_pol_put(xp);
2283         return 0;
2284
2285 out:
2286         security_xfrm_policy_free(xp);
2287         kfree(xp);
2288         return err;
2289 }
2290
2291 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2292 {
2293         int err;
2294         struct sadb_address *sa;
2295         struct sadb_x_policy *pol;
2296         struct xfrm_policy *xp, tmp;
2297         struct xfrm_selector sel;
2298         struct km_event c;
2299         struct sadb_x_sec_ctx *sec_ctx;
2300
2301         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2302                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2303             !ext_hdrs[SADB_X_EXT_POLICY-1])
2304                 return -EINVAL;
2305
2306         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2307         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2308                 return -EINVAL;
2309
2310         memset(&sel, 0, sizeof(sel));
2311
2312         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2313         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2314         sel.prefixlen_s = sa->sadb_address_prefixlen;
2315         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2316         sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2317         if (sel.sport)
2318                 sel.sport_mask = htons(0xffff);
2319
2320         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2321         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2322         sel.prefixlen_d = sa->sadb_address_prefixlen;
2323         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2324         sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2325         if (sel.dport)
2326                 sel.dport_mask = htons(0xffff);
2327
2328         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2329         memset(&tmp, 0, sizeof(struct xfrm_policy));
2330
2331         if (sec_ctx != NULL) {
2332                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2333
2334                 if (!uctx)
2335                         return -ENOMEM;
2336
2337                 err = security_xfrm_policy_alloc(&tmp, uctx);
2338                 kfree(uctx);
2339
2340                 if (err)
2341                         return err;
2342         }
2343
2344         xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
2345                                    &sel, tmp.security, 1, &err);
2346         security_xfrm_policy_free(&tmp);
2347
2348         if (xp == NULL)
2349                 return -ENOENT;
2350
2351         xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2352                        AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
2353
2354         if (err)
2355                 goto out;
2356
2357         c.seq = hdr->sadb_msg_seq;
2358         c.pid = hdr->sadb_msg_pid;
2359         c.event = XFRM_MSG_DELPOLICY;
2360         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2361
2362 out:
2363         xfrm_pol_put(xp);
2364         return err;
2365 }
2366
2367 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2368 {
2369         int err;
2370         struct sk_buff *out_skb;
2371         struct sadb_msg *out_hdr;
2372         err = 0;
2373
2374         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2375         if (IS_ERR(out_skb)) {
2376                 err =  PTR_ERR(out_skb);
2377                 goto out;
2378         }
2379         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2380         if (err < 0)
2381                 goto out;
2382
2383         out_hdr = (struct sadb_msg *) out_skb->data;
2384         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2385         out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2386         out_hdr->sadb_msg_satype = 0;
2387         out_hdr->sadb_msg_errno = 0;
2388         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2389         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2390         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2391         err = 0;
2392
2393 out:
2394         return err;
2395 }
2396
2397 #ifdef CONFIG_NET_KEY_MIGRATE
2398 static int pfkey_sockaddr_pair_size(sa_family_t family)
2399 {
2400         switch (family) {
2401         case AF_INET:
2402                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2403 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2404         case AF_INET6:
2405                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2406 #endif
2407         default:
2408                 return 0;
2409         }
2410         /* NOTREACHED */
2411 }
2412
2413 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2414                                xfrm_address_t *saddr, xfrm_address_t *daddr,
2415                                u16 *family)
2416 {
2417         struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2418         if (rq->sadb_x_ipsecrequest_len <
2419             pfkey_sockaddr_pair_size(sa->sa_family))
2420                 return -EINVAL;
2421
2422         switch (sa->sa_family) {
2423         case AF_INET:
2424                 {
2425                         struct sockaddr_in *sin;
2426                         sin = (struct sockaddr_in *)sa;
2427                         if ((sin+1)->sin_family != AF_INET)
2428                                 return -EINVAL;
2429                         memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2430                         sin++;
2431                         memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2432                         *family = AF_INET;
2433                         break;
2434                 }
2435 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2436         case AF_INET6:
2437                 {
2438                         struct sockaddr_in6 *sin6;
2439                         sin6 = (struct sockaddr_in6 *)sa;
2440                         if ((sin6+1)->sin6_family != AF_INET6)
2441                                 return -EINVAL;
2442                         memcpy(&saddr->a6, &sin6->sin6_addr,
2443                                sizeof(saddr->a6));
2444                         sin6++;
2445                         memcpy(&daddr->a6, &sin6->sin6_addr,
2446                                sizeof(daddr->a6));
2447                         *family = AF_INET6;
2448                         break;
2449                 }
2450 #endif
2451         default:
2452                 return -EINVAL;
2453         }
2454
2455         return 0;
2456 }
2457
2458 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2459                                     struct xfrm_migrate *m)
2460 {
2461         int err;
2462         struct sadb_x_ipsecrequest *rq2;
2463         int mode;
2464
2465         if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2466             len < rq1->sadb_x_ipsecrequest_len)
2467                 return -EINVAL;
2468
2469         /* old endoints */
2470         err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2471                                   &m->old_family);
2472         if (err)
2473                 return err;
2474
2475         rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2476         len -= rq1->sadb_x_ipsecrequest_len;
2477
2478         if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2479             len < rq2->sadb_x_ipsecrequest_len)
2480                 return -EINVAL;
2481
2482         /* new endpoints */
2483         err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2484                                   &m->new_family);
2485         if (err)
2486                 return err;
2487
2488         if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2489             rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2490             rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2491                 return -EINVAL;
2492
2493         m->proto = rq1->sadb_x_ipsecrequest_proto;
2494         if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2495                 return -EINVAL;
2496         m->mode = mode;
2497         m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2498
2499         return ((int)(rq1->sadb_x_ipsecrequest_len +
2500                       rq2->sadb_x_ipsecrequest_len));
2501 }
2502
2503 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2504                          struct sadb_msg *hdr, void **ext_hdrs)
2505 {
2506         int i, len, ret, err = -EINVAL;
2507         u8 dir;
2508         struct sadb_address *sa;
2509         struct sadb_x_policy *pol;
2510         struct sadb_x_ipsecrequest *rq;
2511         struct xfrm_selector sel;
2512         struct xfrm_migrate m[XFRM_MAX_DEPTH];
2513
2514         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2515             ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2516             !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2517                 err = -EINVAL;
2518                 goto out;
2519         }
2520
2521         pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2522         if (!pol) {
2523                 err = -EINVAL;
2524                 goto out;
2525         }
2526
2527         if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2528                 err = -EINVAL;
2529                 goto out;
2530         }
2531
2532         dir = pol->sadb_x_policy_dir - 1;
2533         memset(&sel, 0, sizeof(sel));
2534
2535         /* set source address info of selector */
2536         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2537         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2538         sel.prefixlen_s = sa->sadb_address_prefixlen;
2539         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2540         sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2541         if (sel.sport)
2542                 sel.sport_mask = ~0;
2543
2544         /* set destination address info of selector */
2545         sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2546         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2547         sel.prefixlen_d = sa->sadb_address_prefixlen;
2548         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2549         sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2550         if (sel.dport)
2551                 sel.dport_mask = ~0;
2552
2553         rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2554
2555         /* extract ipsecrequests */
2556         i = 0;
2557         len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2558
2559         while (len > 0 && i < XFRM_MAX_DEPTH) {
2560                 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2561                 if (ret < 0) {
2562                         err = ret;
2563                         goto out;
2564                 } else {
2565                         rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2566                         len -= ret;
2567                         i++;
2568                 }
2569         }
2570
2571         if (!i || len > 0) {
2572                 err = -EINVAL;
2573                 goto out;
2574         }
2575
2576         return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2577
2578  out:
2579         return err;
2580 }
2581 #else
2582 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2583                          struct sadb_msg *hdr, void **ext_hdrs)
2584 {
2585         return -ENOPROTOOPT;
2586 }
2587 #endif
2588
2589
2590 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2591 {
2592         unsigned int dir;
2593         int err = 0, delete;
2594         struct sadb_x_policy *pol;
2595         struct xfrm_policy *xp;
2596         struct km_event c;
2597
2598         if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2599                 return -EINVAL;
2600
2601         dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2602         if (dir >= XFRM_POLICY_MAX)
2603                 return -EINVAL;
2604
2605         delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2606         xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2607                               delete, &err);
2608         if (xp == NULL)
2609                 return -ENOENT;
2610
2611         if (delete) {
2612                 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2613                                AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
2614
2615                 if (err)
2616                         goto out;
2617                 c.seq = hdr->sadb_msg_seq;
2618                 c.pid = hdr->sadb_msg_pid;
2619                 c.data.byid = 1;
2620                 c.event = XFRM_MSG_DELPOLICY;
2621                 km_policy_notify(xp, dir, &c);
2622         } else {
2623                 err = key_pol_get_resp(sk, xp, hdr, dir);
2624         }
2625
2626 out:
2627         xfrm_pol_put(xp);
2628         return err;
2629 }
2630
2631 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2632 {
2633         struct pfkey_dump_data *data = ptr;
2634         struct sk_buff *out_skb;
2635         struct sadb_msg *out_hdr;
2636         int err;
2637
2638         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2639         if (IS_ERR(out_skb))
2640                 return PTR_ERR(out_skb);
2641
2642         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2643         if (err < 0)
2644                 return err;
2645
2646         out_hdr = (struct sadb_msg *) out_skb->data;
2647         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2648         out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2649         out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2650         out_hdr->sadb_msg_errno = 0;
2651         out_hdr->sadb_msg_seq = count;
2652         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2653         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2654         return 0;
2655 }
2656
2657 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2658 {
2659         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2660
2661         return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data);
2662 }
2663
2664 static int key_notify_policy_flush(struct km_event *c)
2665 {
2666         struct sk_buff *skb_out;
2667         struct sadb_msg *hdr;
2668
2669         skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2670         if (!skb_out)
2671                 return -ENOBUFS;
2672         hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2673         hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2674         hdr->sadb_msg_seq = c->seq;
2675         hdr->sadb_msg_pid = c->pid;
2676         hdr->sadb_msg_version = PF_KEY_V2;
2677         hdr->sadb_msg_errno = (uint8_t) 0;
2678         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2679         pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2680         return 0;
2681
2682 }
2683
2684 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2685 {
2686         struct km_event c;
2687         struct xfrm_audit audit_info;
2688
2689         audit_info.loginuid = audit_get_loginuid(current->audit_context);
2690         audit_info.secid = 0;
2691         xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2692         c.data.type = XFRM_POLICY_TYPE_MAIN;
2693         c.event = XFRM_MSG_FLUSHPOLICY;
2694         c.pid = hdr->sadb_msg_pid;
2695         c.seq = hdr->sadb_msg_seq;
2696         km_policy_notify(NULL, 0, &c);
2697
2698         return 0;
2699 }
2700
2701 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2702                              struct sadb_msg *hdr, void **ext_hdrs);
2703 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2704         [SADB_RESERVED]         = pfkey_reserved,
2705         [SADB_GETSPI]           = pfkey_getspi,
2706         [SADB_UPDATE]           = pfkey_add,
2707         [SADB_ADD]              = pfkey_add,
2708         [SADB_DELETE]           = pfkey_delete,
2709         [SADB_GET]              = pfkey_get,
2710         [SADB_ACQUIRE]          = pfkey_acquire,
2711         [SADB_REGISTER]         = pfkey_register,
2712         [SADB_EXPIRE]           = NULL,
2713         [SADB_FLUSH]            = pfkey_flush,
2714         [SADB_DUMP]             = pfkey_dump,
2715         [SADB_X_PROMISC]        = pfkey_promisc,
2716         [SADB_X_PCHANGE]        = NULL,
2717         [SADB_X_SPDUPDATE]      = pfkey_spdadd,
2718         [SADB_X_SPDADD]         = pfkey_spdadd,
2719         [SADB_X_SPDDELETE]      = pfkey_spddelete,
2720         [SADB_X_SPDGET]         = pfkey_spdget,
2721         [SADB_X_SPDACQUIRE]     = NULL,
2722         [SADB_X_SPDDUMP]        = pfkey_spddump,
2723         [SADB_X_SPDFLUSH]       = pfkey_spdflush,
2724         [SADB_X_SPDSETIDX]      = pfkey_spdadd,
2725         [SADB_X_SPDDELETE2]     = pfkey_spdget,
2726         [SADB_X_MIGRATE]        = pfkey_migrate,
2727 };
2728
2729 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2730 {
2731         void *ext_hdrs[SADB_EXT_MAX];
2732         int err;
2733
2734         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2735                         BROADCAST_PROMISC_ONLY, NULL);
2736
2737         memset(ext_hdrs, 0, sizeof(ext_hdrs));
2738         err = parse_exthdrs(skb, hdr, ext_hdrs);
2739         if (!err) {
2740                 err = -EOPNOTSUPP;
2741                 if (pfkey_funcs[hdr->sadb_msg_type])
2742                         err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2743         }
2744         return err;
2745 }
2746
2747 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2748 {
2749         struct sadb_msg *hdr = NULL;
2750
2751         if (skb->len < sizeof(*hdr)) {
2752                 *errp = -EMSGSIZE;
2753         } else {
2754                 hdr = (struct sadb_msg *) skb->data;
2755                 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2756                     hdr->sadb_msg_reserved != 0 ||
2757                     (hdr->sadb_msg_type <= SADB_RESERVED ||
2758                      hdr->sadb_msg_type > SADB_MAX)) {
2759                         hdr = NULL;
2760                         *errp = -EINVAL;
2761                 } else if (hdr->sadb_msg_len != (skb->len /
2762                                                  sizeof(uint64_t)) ||
2763                            hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2764                                                 sizeof(uint64_t))) {
2765                         hdr = NULL;
2766                         *errp = -EMSGSIZE;
2767                 } else {
2768                         *errp = 0;
2769                 }
2770         }
2771         return hdr;
2772 }
2773
2774 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2775 {
2776         return t->aalgos & (1 << d->desc.sadb_alg_id);
2777 }
2778
2779 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2780 {
2781         return t->ealgos & (1 << d->desc.sadb_alg_id);
2782 }
2783
2784 static int count_ah_combs(struct xfrm_tmpl *t)
2785 {
2786         int i, sz = 0;
2787
2788         for (i = 0; ; i++) {
2789                 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2790                 if (!aalg)
2791                         break;
2792                 if (aalg_tmpl_set(t, aalg) && aalg->available)
2793                         sz += sizeof(struct sadb_comb);
2794         }
2795         return sz + sizeof(struct sadb_prop);
2796 }
2797
2798 static int count_esp_combs(struct xfrm_tmpl *t)
2799 {
2800         int i, k, sz = 0;
2801
2802         for (i = 0; ; i++) {
2803                 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2804                 if (!ealg)
2805                         break;
2806
2807                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2808                         continue;
2809
2810                 for (k = 1; ; k++) {
2811                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2812                         if (!aalg)
2813                                 break;
2814
2815                         if (aalg_tmpl_set(t, aalg) && aalg->available)
2816                                 sz += sizeof(struct sadb_comb);
2817                 }
2818         }
2819         return sz + sizeof(struct sadb_prop);
2820 }
2821
2822 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2823 {
2824         struct sadb_prop *p;
2825         int i;
2826
2827         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2828         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2829         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2830         p->sadb_prop_replay = 32;
2831         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2832
2833         for (i = 0; ; i++) {
2834                 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2835                 if (!aalg)
2836                         break;
2837
2838                 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2839                         struct sadb_comb *c;
2840                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2841                         memset(c, 0, sizeof(*c));
2842                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2843                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2844                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2845                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2846                         c->sadb_comb_hard_addtime = 24*60*60;
2847                         c->sadb_comb_soft_addtime = 20*60*60;
2848                         c->sadb_comb_hard_usetime = 8*60*60;
2849                         c->sadb_comb_soft_usetime = 7*60*60;
2850                 }
2851         }
2852 }
2853
2854 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2855 {
2856         struct sadb_prop *p;
2857         int i, k;
2858
2859         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2860         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2861         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2862         p->sadb_prop_replay = 32;
2863         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2864
2865         for (i=0; ; i++) {
2866                 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2867                 if (!ealg)
2868                         break;
2869
2870                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2871                         continue;
2872
2873                 for (k = 1; ; k++) {
2874                         struct sadb_comb *c;
2875                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2876                         if (!aalg)
2877                                 break;
2878                         if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2879                                 continue;
2880                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2881                         memset(c, 0, sizeof(*c));
2882                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2883                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2884                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2885                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2886                         c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2887                         c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2888                         c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2889                         c->sadb_comb_hard_addtime = 24*60*60;
2890                         c->sadb_comb_soft_addtime = 20*60*60;
2891                         c->sadb_comb_hard_usetime = 8*60*60;
2892                         c->sadb_comb_soft_usetime = 7*60*60;
2893                 }
2894         }
2895 }
2896
2897 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2898 {
2899         return 0;
2900 }
2901
2902 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2903 {
2904         struct sk_buff *out_skb;
2905         struct sadb_msg *out_hdr;
2906         int hard;
2907         int hsc;
2908
2909         hard = c->data.hard;
2910         if (hard)
2911                 hsc = 2;
2912         else
2913                 hsc = 1;
2914
2915         out_skb = pfkey_xfrm_state2msg(x, 0, hsc);
2916         if (IS_ERR(out_skb))
2917                 return PTR_ERR(out_skb);
2918
2919         out_hdr = (struct sadb_msg *) out_skb->data;
2920         out_hdr->sadb_msg_version = PF_KEY_V2;
2921         out_hdr->sadb_msg_type = SADB_EXPIRE;
2922         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2923         out_hdr->sadb_msg_errno = 0;
2924         out_hdr->sadb_msg_reserved = 0;
2925         out_hdr->sadb_msg_seq = 0;
2926         out_hdr->sadb_msg_pid = 0;
2927
2928         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2929         return 0;
2930 }
2931
2932 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2933 {
2934         switch (c->event) {
2935         case XFRM_MSG_EXPIRE:
2936                 return key_notify_sa_expire(x, c);
2937         case XFRM_MSG_DELSA:
2938         case XFRM_MSG_NEWSA:
2939         case XFRM_MSG_UPDSA:
2940                 return key_notify_sa(x, c);
2941         case XFRM_MSG_FLUSHSA:
2942                 return key_notify_sa_flush(c);
2943         case XFRM_MSG_NEWAE: /* not yet supported */
2944                 break;
2945         default:
2946                 printk("pfkey: Unknown SA event %d\n", c->event);
2947                 break;
2948         }
2949
2950         return 0;
2951 }
2952
2953 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2954 {
2955         if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2956                 return 0;
2957
2958         switch (c->event) {
2959         case XFRM_MSG_POLEXPIRE:
2960                 return key_notify_policy_expire(xp, c);
2961         case XFRM_MSG_DELPOLICY:
2962         case XFRM_MSG_NEWPOLICY:
2963         case XFRM_MSG_UPDPOLICY:
2964                 return key_notify_policy(xp, dir, c);
2965         case XFRM_MSG_FLUSHPOLICY:
2966                 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2967                         break;
2968                 return key_notify_policy_flush(c);
2969         default:
2970                 printk("pfkey: Unknown policy event %d\n", c->event);
2971                 break;
2972         }
2973
2974         return 0;
2975 }
2976
2977 static u32 get_acqseq(void)
2978 {
2979         u32 res;
2980         static u32 acqseq;
2981         static DEFINE_SPINLOCK(acqseq_lock);
2982
2983         spin_lock_bh(&acqseq_lock);
2984         res = (++acqseq ? : ++acqseq);
2985         spin_unlock_bh(&acqseq_lock);
2986         return res;
2987 }
2988
2989 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
2990 {
2991         struct sk_buff *skb;
2992         struct sadb_msg *hdr;
2993         struct sadb_address *addr;
2994         struct sadb_x_policy *pol;
2995         struct sockaddr_in *sin;
2996 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2997         struct sockaddr_in6 *sin6;
2998 #endif
2999         int sockaddr_size;
3000         int size;
3001         struct sadb_x_sec_ctx *sec_ctx;
3002         struct xfrm_sec_ctx *xfrm_ctx;
3003         int ctx_size = 0;
3004
3005         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3006         if (!sockaddr_size)
3007                 return -EINVAL;
3008
3009         size = sizeof(struct sadb_msg) +
3010                 (sizeof(struct sadb_address) * 2) +
3011                 (sockaddr_size * 2) +
3012                 sizeof(struct sadb_x_policy);
3013
3014         if (x->id.proto == IPPROTO_AH)
3015                 size += count_ah_combs(t);
3016         else if (x->id.proto == IPPROTO_ESP)
3017                 size += count_esp_combs(t);
3018
3019         if ((xfrm_ctx = x->security)) {
3020                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3021                 size +=  sizeof(struct sadb_x_sec_ctx) + ctx_size;
3022         }
3023
3024         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3025         if (skb == NULL)
3026                 return -ENOMEM;
3027
3028         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3029         hdr->sadb_msg_version = PF_KEY_V2;
3030         hdr->sadb_msg_type = SADB_ACQUIRE;
3031         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3032         hdr->sadb_msg_len = size / sizeof(uint64_t);
3033         hdr->sadb_msg_errno = 0;
3034         hdr->sadb_msg_reserved = 0;
3035         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3036         hdr->sadb_msg_pid = 0;
3037
3038         /* src address */
3039         addr = (struct sadb_address*) skb_put(skb,
3040                                               sizeof(struct sadb_address)+sockaddr_size);
3041         addr->sadb_address_len =
3042                 (sizeof(struct sadb_address)+sockaddr_size)/
3043                         sizeof(uint64_t);
3044         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3045         addr->sadb_address_proto = 0;
3046         addr->sadb_address_reserved = 0;
3047         if (x->props.family == AF_INET) {
3048                 addr->sadb_address_prefixlen = 32;
3049
3050                 sin = (struct sockaddr_in *) (addr + 1);
3051                 sin->sin_family = AF_INET;
3052                 sin->sin_addr.s_addr = x->props.saddr.a4;
3053                 sin->sin_port = 0;
3054                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3055         }
3056 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3057         else if (x->props.family == AF_INET6) {
3058                 addr->sadb_address_prefixlen = 128;
3059
3060                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3061                 sin6->sin6_family = AF_INET6;
3062                 sin6->sin6_port = 0;
3063                 sin6->sin6_flowinfo = 0;
3064                 memcpy(&sin6->sin6_addr,
3065                        x->props.saddr.a6, sizeof(struct in6_addr));
3066                 sin6->sin6_scope_id = 0;
3067         }
3068 #endif
3069         else
3070                 BUG();
3071
3072         /* dst address */
3073         addr = (struct sadb_address*) skb_put(skb,
3074                                               sizeof(struct sadb_address)+sockaddr_size);
3075         addr->sadb_address_len =
3076                 (sizeof(struct sadb_address)+sockaddr_size)/
3077                         sizeof(uint64_t);
3078         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3079         addr->sadb_address_proto = 0;
3080         addr->sadb_address_reserved = 0;
3081         if (x->props.family == AF_INET) {
3082                 addr->sadb_address_prefixlen = 32;
3083
3084                 sin = (struct sockaddr_in *) (addr + 1);
3085                 sin->sin_family = AF_INET;
3086                 sin->sin_addr.s_addr = x->id.daddr.a4;
3087                 sin->sin_port = 0;
3088                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3089         }
3090 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3091         else if (x->props.family == AF_INET6) {
3092                 addr->sadb_address_prefixlen = 128;
3093
3094                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3095                 sin6->sin6_family = AF_INET6;
3096                 sin6->sin6_port = 0;
3097                 sin6->sin6_flowinfo = 0;
3098                 memcpy(&sin6->sin6_addr,
3099                        x->id.daddr.a6, sizeof(struct in6_addr));
3100                 sin6->sin6_scope_id = 0;
3101         }
3102 #endif
3103         else
3104                 BUG();
3105
3106         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
3107         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3108         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3109         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3110         pol->sadb_x_policy_dir = dir+1;
3111         pol->sadb_x_policy_id = xp->index;
3112
3113         /* Set sadb_comb's. */
3114         if (x->id.proto == IPPROTO_AH)
3115                 dump_ah_combs(skb, t);
3116         else if (x->id.proto == IPPROTO_ESP)
3117                 dump_esp_combs(skb, t);
3118
3119         /* security context */
3120         if (xfrm_ctx) {
3121                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3122                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3123                 sec_ctx->sadb_x_sec_len =
3124                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3125                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3126                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3127                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3128                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3129                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3130                        xfrm_ctx->ctx_len);
3131         }
3132
3133         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3134 }
3135
3136 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3137                                                 u8 *data, int len, int *dir)
3138 {
3139         struct xfrm_policy *xp;
3140         struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3141         struct sadb_x_sec_ctx *sec_ctx;
3142
3143         switch (sk->sk_family) {
3144         case AF_INET:
3145                 if (opt != IP_IPSEC_POLICY) {
3146                         *dir = -EOPNOTSUPP;
3147                         return NULL;
3148                 }
3149                 break;
3150 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3151         case AF_INET6:
3152                 if (opt != IPV6_IPSEC_POLICY) {
3153                         *dir = -EOPNOTSUPP;
3154                         return NULL;
3155                 }
3156                 break;
3157 #endif
3158         default:
3159                 *dir = -EINVAL;
3160                 return NULL;
3161         }
3162
3163         *dir = -EINVAL;
3164
3165         if (len < sizeof(struct sadb_x_policy) ||
3166             pol->sadb_x_policy_len*8 > len ||
3167             pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3168             (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3169                 return NULL;
3170
3171         xp = xfrm_policy_alloc(GFP_ATOMIC);
3172         if (xp == NULL) {
3173                 *dir = -ENOBUFS;
3174                 return NULL;
3175         }
3176
3177         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3178                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3179
3180         xp->lft.soft_byte_limit = XFRM_INF;
3181         xp->lft.hard_byte_limit = XFRM_INF;
3182         xp->lft.soft_packet_limit = XFRM_INF;
3183         xp->lft.hard_packet_limit = XFRM_INF;
3184         xp->family = sk->sk_family;
3185
3186         xp->xfrm_nr = 0;
3187         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3188             (*dir = parse_ipsecrequests(xp, pol)) < 0)
3189                 goto out;
3190
3191         /* security context too */
3192         if (len >= (pol->sadb_x_policy_len*8 +
3193             sizeof(struct sadb_x_sec_ctx))) {
3194                 char *p = (char *)pol;
3195                 struct xfrm_user_sec_ctx *uctx;
3196
3197                 p += pol->sadb_x_policy_len*8;
3198                 sec_ctx = (struct sadb_x_sec_ctx *)p;
3199                 if (len < pol->sadb_x_policy_len*8 +
3200                     sec_ctx->sadb_x_sec_len) {
3201                         *dir = -EINVAL;
3202                         goto out;
3203                 }
3204                 if ((*dir = verify_sec_ctx_len(p)))
3205                         goto out;
3206                 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3207                 *dir = security_xfrm_policy_alloc(xp, uctx);
3208                 kfree(uctx);
3209
3210                 if (*dir)
3211                         goto out;
3212         }
3213
3214         *dir = pol->sadb_x_policy_dir-1;
3215         return xp;
3216
3217 out:
3218         security_xfrm_policy_free(xp);
3219         kfree(xp);
3220         return NULL;
3221 }
3222
3223 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3224 {
3225         struct sk_buff *skb;
3226         struct sadb_msg *hdr;
3227         struct sadb_sa *sa;
3228         struct sadb_address *addr;
3229         struct sadb_x_nat_t_port *n_port;
3230         struct sockaddr_in *sin;
3231 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3232         struct sockaddr_in6 *sin6;
3233 #endif
3234         int sockaddr_size;
3235         int size;
3236         __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3237         struct xfrm_encap_tmpl *natt = NULL;
3238
3239         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3240         if (!sockaddr_size)
3241                 return -EINVAL;
3242
3243         if (!satype)
3244                 return -EINVAL;
3245
3246         if (!x->encap)
3247                 return -EINVAL;
3248
3249         natt = x->encap;
3250
3251         /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3252          *
3253          * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3254          * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3255          */
3256
3257         size = sizeof(struct sadb_msg) +
3258                 sizeof(struct sadb_sa) +
3259                 (sizeof(struct sadb_address) * 2) +
3260                 (sockaddr_size * 2) +
3261                 (sizeof(struct sadb_x_nat_t_port) * 2);
3262
3263         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3264         if (skb == NULL)
3265                 return -ENOMEM;
3266
3267         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3268         hdr->sadb_msg_version = PF_KEY_V2;
3269         hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3270         hdr->sadb_msg_satype = satype;
3271         hdr->sadb_msg_len = size / sizeof(uint64_t);
3272         hdr->sadb_msg_errno = 0;
3273         hdr->sadb_msg_reserved = 0;
3274         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3275         hdr->sadb_msg_pid = 0;
3276
3277         /* SA */
3278         sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3279         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3280         sa->sadb_sa_exttype = SADB_EXT_SA;
3281         sa->sadb_sa_spi = x->id.spi;
3282         sa->sadb_sa_replay = 0;
3283         sa->sadb_sa_state = 0;
3284         sa->sadb_sa_auth = 0;
3285         sa->sadb_sa_encrypt = 0;
3286         sa->sadb_sa_flags = 0;
3287
3288         /* ADDRESS_SRC (old addr) */
3289         addr = (struct sadb_address*)
3290                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3291         addr->sadb_address_len =
3292                 (sizeof(struct sadb_address)+sockaddr_size)/
3293                         sizeof(uint64_t);
3294         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3295         addr->sadb_address_proto = 0;
3296         addr->sadb_address_reserved = 0;
3297         if (x->props.family == AF_INET) {
3298                 addr->sadb_address_prefixlen = 32;
3299
3300                 sin = (struct sockaddr_in *) (addr + 1);
3301                 sin->sin_family = AF_INET;
3302                 sin->sin_addr.s_addr = x->props.saddr.a4;
3303                 sin->sin_port = 0;
3304                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3305         }
3306 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3307         else if (x->props.family == AF_INET6) {
3308                 addr->sadb_address_prefixlen = 128;
3309
3310                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3311                 sin6->sin6_family = AF_INET6;
3312                 sin6->sin6_port = 0;
3313                 sin6->sin6_flowinfo = 0;
3314                 memcpy(&sin6->sin6_addr,
3315                        x->props.saddr.a6, sizeof(struct in6_addr));
3316                 sin6->sin6_scope_id = 0;
3317         }
3318 #endif
3319         else
3320                 BUG();
3321
3322         /* NAT_T_SPORT (old port) */
3323         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3324         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3325         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3326         n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3327         n_port->sadb_x_nat_t_port_reserved = 0;
3328
3329         /* ADDRESS_DST (new addr) */
3330         addr = (struct sadb_address*)
3331                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3332         addr->sadb_address_len =
3333                 (sizeof(struct sadb_address)+sockaddr_size)/
3334                         sizeof(uint64_t);
3335         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3336         addr->sadb_address_proto = 0;
3337         addr->sadb_address_reserved = 0;
3338         if (x->props.family == AF_INET) {
3339                 addr->sadb_address_prefixlen = 32;
3340
3341                 sin = (struct sockaddr_in *) (addr + 1);
3342                 sin->sin_family = AF_INET;
3343                 sin->sin_addr.s_addr = ipaddr->a4;
3344                 sin->sin_port = 0;
3345                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3346         }
3347 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3348         else if (x->props.family == AF_INET6) {
3349                 addr->sadb_address_prefixlen = 128;
3350
3351                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3352                 sin6->sin6_family = AF_INET6;
3353                 sin6->sin6_port = 0;
3354                 sin6->sin6_flowinfo = 0;
3355                 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3356                 sin6->sin6_scope_id = 0;
3357         }
3358 #endif
3359         else
3360                 BUG();
3361
3362         /* NAT_T_DPORT (new port) */
3363         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3364         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3365         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3366         n_port->sadb_x_nat_t_port_port = sport;
3367         n_port->sadb_x_nat_t_port_reserved = 0;
3368
3369         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3370 }
3371
3372 #ifdef CONFIG_NET_KEY_MIGRATE
3373 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3374                             struct xfrm_selector *sel)
3375 {
3376         struct sadb_address *addr;
3377         struct sockaddr_in *sin;
3378 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3379         struct sockaddr_in6 *sin6;
3380 #endif
3381         addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3382         addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3383         addr->sadb_address_exttype = type;
3384         addr->sadb_address_proto = sel->proto;
3385         addr->sadb_address_reserved = 0;
3386
3387         switch (type) {
3388         case SADB_EXT_ADDRESS_SRC:
3389                 if (sel->family == AF_INET) {
3390                         addr->sadb_address_prefixlen = sel->prefixlen_s;
3391                         sin = (struct sockaddr_in *)(addr + 1);
3392                         sin->sin_family = AF_INET;
3393                         memcpy(&sin->sin_addr.s_addr, &sel->saddr,
3394                                sizeof(sin->sin_addr.s_addr));
3395                         sin->sin_port = 0;
3396                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3397                 }
3398 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3399                 else if (sel->family == AF_INET6) {
3400                         addr->sadb_address_prefixlen = sel->prefixlen_s;
3401                         sin6 = (struct sockaddr_in6 *)(addr + 1);
3402                         sin6->sin6_family = AF_INET6;
3403                         sin6->sin6_port = 0;
3404                         sin6->sin6_flowinfo = 0;
3405                         sin6->sin6_scope_id = 0;
3406                         memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr,
3407                                sizeof(sin6->sin6_addr.s6_addr));
3408                 }
3409 #endif
3410                 break;
3411         case SADB_EXT_ADDRESS_DST:
3412                 if (sel->family == AF_INET) {
3413                         addr->sadb_address_prefixlen = sel->prefixlen_d;
3414                         sin = (struct sockaddr_in *)(addr + 1);
3415                         sin->sin_family = AF_INET;
3416                         memcpy(&sin->sin_addr.s_addr, &sel->daddr,
3417                                sizeof(sin->sin_addr.s_addr));
3418                         sin->sin_port = 0;
3419                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3420                 }
3421 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3422                 else if (sel->family == AF_INET6) {
3423                         addr->sadb_address_prefixlen = sel->prefixlen_d;
3424                         sin6 = (struct sockaddr_in6 *)(addr + 1);
3425                         sin6->sin6_family = AF_INET6;
3426                         sin6->sin6_port = 0;
3427                         sin6->sin6_flowinfo = 0;
3428                         sin6->sin6_scope_id = 0;
3429                         memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr,
3430                                sizeof(sin6->sin6_addr.s6_addr));
3431                 }
3432 #endif
3433                 break;
3434         default:
3435                 return -EINVAL;
3436         }
3437
3438         return 0;
3439 }
3440
3441 static int set_ipsecrequest(struct sk_buff *skb,
3442                             uint8_t proto, uint8_t mode, int level,
3443                             uint32_t reqid, uint8_t family,
3444                             xfrm_address_t *src, xfrm_address_t *dst)
3445 {
3446         struct sadb_x_ipsecrequest *rq;
3447         struct sockaddr_in *sin;
3448 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3449         struct sockaddr_in6 *sin6;
3450 #endif
3451         int size_req;
3452
3453         size_req = sizeof(struct sadb_x_ipsecrequest) +
3454                    pfkey_sockaddr_pair_size(family);
3455
3456         rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3457         memset(rq, 0, size_req);
3458         rq->sadb_x_ipsecrequest_len = size_req;
3459         rq->sadb_x_ipsecrequest_proto = proto;
3460         rq->sadb_x_ipsecrequest_mode = mode;
3461         rq->sadb_x_ipsecrequest_level = level;
3462         rq->sadb_x_ipsecrequest_reqid = reqid;
3463
3464         switch (family) {
3465         case AF_INET:
3466                 sin = (struct sockaddr_in *)(rq + 1);
3467                 sin->sin_family = AF_INET;
3468                 memcpy(&sin->sin_addr.s_addr, src,
3469                        sizeof(sin->sin_addr.s_addr));
3470                 sin++;
3471                 sin->sin_family = AF_INET;
3472                 memcpy(&sin->sin_addr.s_addr, dst,
3473                        sizeof(sin->sin_addr.s_addr));
3474                 break;
3475 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3476         case AF_INET6:
3477                 sin6 = (struct sockaddr_in6 *)(rq + 1);
3478                 sin6->sin6_family = AF_INET6;
3479                 sin6->sin6_port = 0;
3480                 sin6->sin6_flowinfo = 0;
3481                 sin6->sin6_scope_id = 0;
3482                 memcpy(&sin6->sin6_addr.s6_addr, src,
3483                        sizeof(sin6->sin6_addr.s6_addr));
3484                 sin6++;
3485                 sin6->sin6_family = AF_INET6;
3486                 sin6->sin6_port = 0;
3487                 sin6->sin6_flowinfo = 0;
3488                 sin6->sin6_scope_id = 0;
3489                 memcpy(&sin6->sin6_addr.s6_addr, dst,
3490                        sizeof(sin6->sin6_addr.s6_addr));
3491                 break;
3492 #endif
3493         default:
3494                 return -EINVAL;
3495         }
3496
3497         return 0;
3498 }
3499 #endif
3500
3501 #ifdef CONFIG_NET_KEY_MIGRATE
3502 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3503                               struct xfrm_migrate *m, int num_bundles)
3504 {
3505         int i;
3506         int sasize_sel;
3507         int size = 0;
3508         int size_pol = 0;
3509         struct sk_buff *skb;
3510         struct sadb_msg *hdr;
3511         struct sadb_x_policy *pol;
3512         struct xfrm_migrate *mp;
3513
3514         if (type != XFRM_POLICY_TYPE_MAIN)
3515                 return 0;
3516
3517         if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3518                 return -EINVAL;
3519
3520         /* selector */
3521         sasize_sel = pfkey_sockaddr_size(sel->family);
3522         if (!sasize_sel)
3523                 return -EINVAL;
3524         size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3525
3526         /* policy info */
3527         size_pol += sizeof(struct sadb_x_policy);
3528
3529         /* ipsecrequests */
3530         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3531                 /* old locator pair */
3532                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3533                             pfkey_sockaddr_pair_size(mp->old_family);
3534                 /* new locator pair */
3535                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3536                             pfkey_sockaddr_pair_size(mp->new_family);
3537         }
3538
3539         size += sizeof(struct sadb_msg) + size_pol;
3540
3541         /* alloc buffer */
3542         skb = alloc_skb(size, GFP_ATOMIC);
3543         if (skb == NULL)
3544                 return -ENOMEM;
3545
3546         hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3547         hdr->sadb_msg_version = PF_KEY_V2;
3548         hdr->sadb_msg_type = SADB_X_MIGRATE;
3549         hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3550         hdr->sadb_msg_len = size / 8;
3551         hdr->sadb_msg_errno = 0;
3552         hdr->sadb_msg_reserved = 0;
3553         hdr->sadb_msg_seq = 0;
3554         hdr->sadb_msg_pid = 0;
3555
3556         /* selector src */
3557         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3558
3559         /* selector dst */
3560         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3561
3562         /* policy information */
3563         pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3564         pol->sadb_x_policy_len = size_pol / 8;
3565         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3566         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3567         pol->sadb_x_policy_dir = dir + 1;
3568         pol->sadb_x_policy_id = 0;
3569         pol->sadb_x_policy_priority = 0;
3570
3571         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3572                 /* old ipsecrequest */
3573                 int mode = pfkey_mode_from_xfrm(mp->mode);
3574                 if (mode < 0)
3575                         return -EINVAL;
3576                 if (set_ipsecrequest(skb, mp->proto, mode,
3577                                      (mp->reqid ?  IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3578                                      mp->reqid, mp->old_family,
3579                                      &mp->old_saddr, &mp->old_daddr) < 0) {
3580                         return -EINVAL;
3581                 }
3582
3583                 /* new ipsecrequest */
3584                 if (set_ipsecrequest(skb, mp->proto, mode,
3585                                      (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3586                                      mp->reqid, mp->new_family,
3587                                      &mp->new_saddr, &mp->new_daddr) < 0) {
3588                         return -EINVAL;
3589                 }
3590         }
3591
3592         /* broadcast migrate message to sockets */
3593         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3594
3595         return 0;
3596 }
3597 #else
3598 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3599                               struct xfrm_migrate *m, int num_bundles)
3600 {
3601         return -ENOPROTOOPT;
3602 }
3603 #endif
3604
3605 static int pfkey_sendmsg(struct kiocb *kiocb,
3606                          struct socket *sock, struct msghdr *msg, size_t len)
3607 {
3608         struct sock *sk = sock->sk;
3609         struct sk_buff *skb = NULL;
3610         struct sadb_msg *hdr = NULL;
3611         int err;
3612
3613         err = -EOPNOTSUPP;
3614         if (msg->msg_flags & MSG_OOB)
3615                 goto out;
3616
3617         err = -EMSGSIZE;
3618         if ((unsigned)len > sk->sk_sndbuf - 32)
3619                 goto out;
3620
3621         err = -ENOBUFS;
3622         skb = alloc_skb(len, GFP_KERNEL);
3623         if (skb == NULL)
3624                 goto out;
3625
3626         err = -EFAULT;
3627         if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3628                 goto out;
3629
3630         hdr = pfkey_get_base_msg(skb, &err);
3631         if (!hdr)
3632                 goto out;
3633
3634         mutex_lock(&xfrm_cfg_mutex);
3635         err = pfkey_process(sk, skb, hdr);
3636         mutex_unlock(&xfrm_cfg_mutex);
3637
3638 out:
3639         if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3640                 err = 0;
3641         if (skb)
3642                 kfree_skb(skb);
3643
3644         return err ? : len;
3645 }
3646
3647 static int pfkey_recvmsg(struct kiocb *kiocb,
3648                          struct socket *sock, struct msghdr *msg, size_t len,
3649                          int flags)
3650 {
3651         struct sock *sk = sock->sk;
3652         struct sk_buff *skb;
3653         int copied, err;
3654
3655         err = -EINVAL;
3656         if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3657                 goto out;
3658
3659         msg->msg_namelen = 0;
3660         skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3661         if (skb == NULL)
3662                 goto out;
3663
3664         copied = skb->len;
3665         if (copied > len) {
3666                 msg->msg_flags |= MSG_TRUNC;
3667                 copied = len;
3668         }
3669
3670         skb->h.raw = skb->data;
3671         err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3672         if (err)
3673                 goto out_free;
3674
3675         sock_recv_timestamp(msg, sk, skb);
3676
3677         err = (flags & MSG_TRUNC) ? skb->len : copied;
3678
3679 out_free:
3680         skb_free_datagram(sk, skb);
3681 out:
3682         return err;
3683 }
3684
3685 static const struct proto_ops pfkey_ops = {
3686         .family         =       PF_KEY,
3687         .owner          =       THIS_MODULE,
3688         /* Operations that make no sense on pfkey sockets. */
3689         .bind           =       sock_no_bind,
3690         .connect        =       sock_no_connect,
3691         .socketpair     =       sock_no_socketpair,
3692         .accept         =       sock_no_accept,
3693         .getname        =       sock_no_getname,
3694         .ioctl          =       sock_no_ioctl,
3695         .listen         =       sock_no_listen,
3696         .shutdown       =       sock_no_shutdown,
3697         .setsockopt     =       sock_no_setsockopt,
3698         .getsockopt     =       sock_no_getsockopt,
3699         .mmap           =       sock_no_mmap,
3700         .sendpage       =       sock_no_sendpage,
3701
3702         /* Now the operations that really occur. */
3703         .release        =       pfkey_release,
3704         .poll           =       datagram_poll,
3705         .sendmsg        =       pfkey_sendmsg,
3706         .recvmsg        =       pfkey_recvmsg,
3707 };
3708
3709 static struct net_proto_family pfkey_family_ops = {
3710         .family =       PF_KEY,
3711         .create =       pfkey_create,
3712         .owner  =       THIS_MODULE,
3713 };
3714
3715 #ifdef CONFIG_PROC_FS
3716 static int pfkey_read_proc(char *buffer, char **start, off_t offset,
3717                            int length, int *eof, void *data)
3718 {
3719         off_t pos = 0;
3720         off_t begin = 0;
3721         int len = 0;
3722         struct sock *s;
3723         struct hlist_node *node;
3724
3725         len += sprintf(buffer,"sk       RefCnt Rmem   Wmem   User   Inode\n");
3726
3727         read_lock(&pfkey_table_lock);
3728
3729         sk_for_each(s, node, &pfkey_table) {
3730                 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
3731                                s,
3732                                atomic_read(&s->sk_refcnt),
3733                                atomic_read(&s->sk_rmem_alloc),
3734                                atomic_read(&s->sk_wmem_alloc),
3735                                sock_i_uid(s),
3736                                sock_i_ino(s)
3737                                );
3738
3739                 buffer[len++] = '\n';
3740
3741                 pos = begin + len;
3742                 if (pos < offset) {
3743                         len = 0;
3744                         begin = pos;
3745                 }
3746                 if(pos > offset + length)
3747                         goto done;
3748         }
3749         *eof = 1;
3750
3751 done:
3752         read_unlock(&pfkey_table_lock);
3753
3754         *start = buffer + (offset - begin);
3755         len -= (offset - begin);
3756
3757         if (len > length)
3758                 len = length;
3759         if (len < 0)
3760                 len = 0;
3761
3762         return len;
3763 }
3764 #endif
3765
3766 static struct xfrm_mgr pfkeyv2_mgr =
3767 {
3768         .id             = "pfkeyv2",
3769         .notify         = pfkey_send_notify,
3770         .acquire        = pfkey_send_acquire,
3771         .compile_policy = pfkey_compile_policy,
3772         .new_mapping    = pfkey_send_new_mapping,
3773         .notify_policy  = pfkey_send_policy_notify,
3774         .migrate        = pfkey_send_migrate,
3775 };
3776
3777 static void __exit ipsec_pfkey_exit(void)
3778 {
3779         xfrm_unregister_km(&pfkeyv2_mgr);
3780         remove_proc_entry("net/pfkey", NULL);
3781         sock_unregister(PF_KEY);
3782         proto_unregister(&key_proto);
3783 }
3784
3785 static int __init ipsec_pfkey_init(void)
3786 {
3787         int err = proto_register(&key_proto, 0);
3788
3789         if (err != 0)
3790                 goto out;
3791
3792         err = sock_register(&pfkey_family_ops);
3793         if (err != 0)
3794                 goto out_unregister_key_proto;
3795 #ifdef CONFIG_PROC_FS
3796         err = -ENOMEM;
3797         if (create_proc_read_entry("net/pfkey", 0, NULL, pfkey_read_proc, NULL) == NULL)
3798                 goto out_sock_unregister;
3799 #endif
3800         err = xfrm_register_km(&pfkeyv2_mgr);
3801         if (err != 0)
3802                 goto out_remove_proc_entry;
3803 out:
3804         return err;
3805 out_remove_proc_entry:
3806 #ifdef CONFIG_PROC_FS
3807         remove_proc_entry("net/pfkey", NULL);
3808 out_sock_unregister:
3809 #endif
3810         sock_unregister(PF_KEY);
3811 out_unregister_key_proto:
3812         proto_unregister(&key_proto);
3813         goto out;
3814 }
3815
3816 module_init(ipsec_pfkey_init);
3817 module_exit(ipsec_pfkey_exit);
3818 MODULE_LICENSE("GPL");
3819 MODULE_ALIAS_NETPROTO(PF_KEY);