[NET] Cleanup: DIV_ROUND_UP
[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 = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
356                 if (sp->sadb_address_len != len ||
357                     sp->sadb_address_prefixlen > 32)
358                         return -EINVAL;
359                 break;
360 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
361         case AF_INET6:
362                 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
363                 if (sp->sadb_address_len != len ||
364                     sp->sadb_address_prefixlen > 128)
365                         return -EINVAL;
366                 break;
367 #endif
368         default:
369                 /* It is user using kernel to keep track of security
370                  * associations for another protocol, such as
371                  * OSPF/RSVP/RIPV2/MIP.  It is user's job to verify
372                  * lengths.
373                  *
374                  * XXX Actually, association/policy database is not yet
375                  * XXX able to cope with arbitrary sockaddr families.
376                  * XXX When it can, remove this -EINVAL.  -DaveM
377                  */
378                 return -EINVAL;
379                 break;
380         }
381
382         return 0;
383 }
384
385 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
386 {
387         return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
388                             sec_ctx->sadb_x_ctx_len,
389                             sizeof(uint64_t));
390 }
391
392 static inline int verify_sec_ctx_len(void *p)
393 {
394         struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
395         int len;
396
397         if (sec_ctx->sadb_x_ctx_len > PAGE_SIZE)
398                 return -EINVAL;
399
400         len = pfkey_sec_ctx_len(sec_ctx);
401
402         if (sec_ctx->sadb_x_sec_len != len)
403                 return -EINVAL;
404
405         return 0;
406 }
407
408 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
409 {
410         struct xfrm_user_sec_ctx *uctx = NULL;
411         int ctx_size = sec_ctx->sadb_x_ctx_len;
412
413         uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
414
415         if (!uctx)
416                 return NULL;
417
418         uctx->len = pfkey_sec_ctx_len(sec_ctx);
419         uctx->exttype = sec_ctx->sadb_x_sec_exttype;
420         uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
421         uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
422         uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
423         memcpy(uctx + 1, sec_ctx + 1,
424                uctx->ctx_len);
425
426         return uctx;
427 }
428
429 static int present_and_same_family(struct sadb_address *src,
430                                    struct sadb_address *dst)
431 {
432         struct sockaddr *s_addr, *d_addr;
433
434         if (!src || !dst)
435                 return 0;
436
437         s_addr = (struct sockaddr *)(src + 1);
438         d_addr = (struct sockaddr *)(dst + 1);
439         if (s_addr->sa_family != d_addr->sa_family)
440                 return 0;
441         if (s_addr->sa_family != AF_INET
442 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
443             && s_addr->sa_family != AF_INET6
444 #endif
445                 )
446                 return 0;
447
448         return 1;
449 }
450
451 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
452 {
453         char *p = (char *) hdr;
454         int len = skb->len;
455
456         len -= sizeof(*hdr);
457         p += sizeof(*hdr);
458         while (len > 0) {
459                 struct sadb_ext *ehdr = (struct sadb_ext *) p;
460                 uint16_t ext_type;
461                 int ext_len;
462
463                 ext_len  = ehdr->sadb_ext_len;
464                 ext_len *= sizeof(uint64_t);
465                 ext_type = ehdr->sadb_ext_type;
466                 if (ext_len < sizeof(uint64_t) ||
467                     ext_len > len ||
468                     ext_type == SADB_EXT_RESERVED)
469                         return -EINVAL;
470
471                 if (ext_type <= SADB_EXT_MAX) {
472                         int min = (int) sadb_ext_min_len[ext_type];
473                         if (ext_len < min)
474                                 return -EINVAL;
475                         if (ext_hdrs[ext_type-1] != NULL)
476                                 return -EINVAL;
477                         if (ext_type == SADB_EXT_ADDRESS_SRC ||
478                             ext_type == SADB_EXT_ADDRESS_DST ||
479                             ext_type == SADB_EXT_ADDRESS_PROXY ||
480                             ext_type == SADB_X_EXT_NAT_T_OA) {
481                                 if (verify_address_len(p))
482                                         return -EINVAL;
483                         }
484                         if (ext_type == SADB_X_EXT_SEC_CTX) {
485                                 if (verify_sec_ctx_len(p))
486                                         return -EINVAL;
487                         }
488                         ext_hdrs[ext_type-1] = p;
489                 }
490                 p   += ext_len;
491                 len -= ext_len;
492         }
493
494         return 0;
495 }
496
497 static uint16_t
498 pfkey_satype2proto(uint8_t satype)
499 {
500         switch (satype) {
501         case SADB_SATYPE_UNSPEC:
502                 return IPSEC_PROTO_ANY;
503         case SADB_SATYPE_AH:
504                 return IPPROTO_AH;
505         case SADB_SATYPE_ESP:
506                 return IPPROTO_ESP;
507         case SADB_X_SATYPE_IPCOMP:
508                 return IPPROTO_COMP;
509                 break;
510         default:
511                 return 0;
512         }
513         /* NOTREACHED */
514 }
515
516 static uint8_t
517 pfkey_proto2satype(uint16_t proto)
518 {
519         switch (proto) {
520         case IPPROTO_AH:
521                 return SADB_SATYPE_AH;
522         case IPPROTO_ESP:
523                 return SADB_SATYPE_ESP;
524         case IPPROTO_COMP:
525                 return SADB_X_SATYPE_IPCOMP;
526                 break;
527         default:
528                 return 0;
529         }
530         /* NOTREACHED */
531 }
532
533 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
534  * say specifically 'just raw sockets' as we encode them as 255.
535  */
536
537 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
538 {
539         return (proto == IPSEC_PROTO_ANY ? 0 : proto);
540 }
541
542 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
543 {
544         return (proto ? proto : IPSEC_PROTO_ANY);
545 }
546
547 static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
548                                      xfrm_address_t *xaddr)
549 {
550         switch (((struct sockaddr*)(addr + 1))->sa_family) {
551         case AF_INET:
552                 xaddr->a4 =
553                         ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
554                 return AF_INET;
555 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
556         case AF_INET6:
557                 memcpy(xaddr->a6,
558                        &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
559                        sizeof(struct in6_addr));
560                 return AF_INET6;
561 #endif
562         default:
563                 return 0;
564         }
565         /* NOTREACHED */
566 }
567
568 static struct  xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
569 {
570         struct sadb_sa *sa;
571         struct sadb_address *addr;
572         uint16_t proto;
573         unsigned short family;
574         xfrm_address_t *xaddr;
575
576         sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
577         if (sa == NULL)
578                 return NULL;
579
580         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
581         if (proto == 0)
582                 return NULL;
583
584         /* sadb_address_len should be checked by caller */
585         addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
586         if (addr == NULL)
587                 return NULL;
588
589         family = ((struct sockaddr *)(addr + 1))->sa_family;
590         switch (family) {
591         case AF_INET:
592                 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
593                 break;
594 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
595         case AF_INET6:
596                 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
597                 break;
598 #endif
599         default:
600                 xaddr = NULL;
601         }
602
603         if (!xaddr)
604                 return NULL;
605
606         return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
607 }
608
609 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
610 static int
611 pfkey_sockaddr_size(sa_family_t family)
612 {
613         switch (family) {
614         case AF_INET:
615                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
616 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
617         case AF_INET6:
618                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
619 #endif
620         default:
621                 return 0;
622         }
623         /* NOTREACHED */
624 }
625
626 static inline int pfkey_mode_from_xfrm(int mode)
627 {
628         switch(mode) {
629         case XFRM_MODE_TRANSPORT:
630                 return IPSEC_MODE_TRANSPORT;
631         case XFRM_MODE_TUNNEL:
632                 return IPSEC_MODE_TUNNEL;
633         case XFRM_MODE_BEET:
634                 return IPSEC_MODE_BEET;
635         default:
636                 return -1;
637         }
638 }
639
640 static inline int pfkey_mode_to_xfrm(int mode)
641 {
642         switch(mode) {
643         case IPSEC_MODE_ANY:    /*XXX*/
644         case IPSEC_MODE_TRANSPORT:
645                 return XFRM_MODE_TRANSPORT;
646         case IPSEC_MODE_TUNNEL:
647                 return XFRM_MODE_TUNNEL;
648         case IPSEC_MODE_BEET:
649                 return XFRM_MODE_BEET;
650         default:
651                 return -1;
652         }
653 }
654
655 static struct sk_buff * pfkey_xfrm_state2msg(struct xfrm_state *x, int add_keys, int hsc)
656 {
657         struct sk_buff *skb;
658         struct sadb_msg *hdr;
659         struct sadb_sa *sa;
660         struct sadb_lifetime *lifetime;
661         struct sadb_address *addr;
662         struct sadb_key *key;
663         struct sadb_x_sa2 *sa2;
664         struct sockaddr_in *sin;
665         struct sadb_x_sec_ctx *sec_ctx;
666         struct xfrm_sec_ctx *xfrm_ctx;
667         int ctx_size = 0;
668 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
669         struct sockaddr_in6 *sin6;
670 #endif
671         int size;
672         int auth_key_size = 0;
673         int encrypt_key_size = 0;
674         int sockaddr_size;
675         struct xfrm_encap_tmpl *natt = NULL;
676         int mode;
677
678         /* address family check */
679         sockaddr_size = pfkey_sockaddr_size(x->props.family);
680         if (!sockaddr_size)
681                 return ERR_PTR(-EINVAL);
682
683         /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
684            key(AE), (identity(SD),) (sensitivity)> */
685         size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
686                 sizeof(struct sadb_lifetime) +
687                 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
688                 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
689                         sizeof(struct sadb_address)*2 +
690                                 sockaddr_size*2 +
691                                         sizeof(struct sadb_x_sa2);
692
693         if ((xfrm_ctx = x->security)) {
694                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
695                 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
696         }
697
698         /* identity & sensitivity */
699
700         if ((x->props.family == AF_INET &&
701              x->sel.saddr.a4 != x->props.saddr.a4)
702 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
703             || (x->props.family == AF_INET6 &&
704                 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
705 #endif
706                 )
707                 size += sizeof(struct sadb_address) + sockaddr_size;
708
709         if (add_keys) {
710                 if (x->aalg && x->aalg->alg_key_len) {
711                         auth_key_size =
712                                 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
713                         size += sizeof(struct sadb_key) + auth_key_size;
714                 }
715                 if (x->ealg && x->ealg->alg_key_len) {
716                         encrypt_key_size =
717                                 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
718                         size += sizeof(struct sadb_key) + encrypt_key_size;
719                 }
720         }
721         if (x->encap)
722                 natt = x->encap;
723
724         if (natt && natt->encap_type) {
725                 size += sizeof(struct sadb_x_nat_t_type);
726                 size += sizeof(struct sadb_x_nat_t_port);
727                 size += sizeof(struct sadb_x_nat_t_port);
728         }
729
730         skb =  alloc_skb(size + 16, GFP_ATOMIC);
731         if (skb == NULL)
732                 return ERR_PTR(-ENOBUFS);
733
734         /* call should fill header later */
735         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
736         memset(hdr, 0, size);   /* XXX do we need this ? */
737         hdr->sadb_msg_len = size / sizeof(uint64_t);
738
739         /* sa */
740         sa = (struct sadb_sa *)  skb_put(skb, sizeof(struct sadb_sa));
741         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
742         sa->sadb_sa_exttype = SADB_EXT_SA;
743         sa->sadb_sa_spi = x->id.spi;
744         sa->sadb_sa_replay = x->props.replay_window;
745         switch (x->km.state) {
746         case XFRM_STATE_VALID:
747                 sa->sadb_sa_state = x->km.dying ?
748                         SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
749                 break;
750         case XFRM_STATE_ACQ:
751                 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
752                 break;
753         default:
754                 sa->sadb_sa_state = SADB_SASTATE_DEAD;
755                 break;
756         }
757         sa->sadb_sa_auth = 0;
758         if (x->aalg) {
759                 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
760                 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
761         }
762         sa->sadb_sa_encrypt = 0;
763         BUG_ON(x->ealg && x->calg);
764         if (x->ealg) {
765                 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
766                 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
767         }
768         /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
769         if (x->calg) {
770                 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
771                 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
772         }
773
774         sa->sadb_sa_flags = 0;
775         if (x->props.flags & XFRM_STATE_NOECN)
776                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
777         if (x->props.flags & XFRM_STATE_DECAP_DSCP)
778                 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
779         if (x->props.flags & XFRM_STATE_NOPMTUDISC)
780                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
781
782         /* hard time */
783         if (hsc & 2) {
784                 lifetime = (struct sadb_lifetime *)  skb_put(skb,
785                                                              sizeof(struct sadb_lifetime));
786                 lifetime->sadb_lifetime_len =
787                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
788                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
789                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.hard_packet_limit);
790                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
791                 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
792                 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
793         }
794         /* soft time */
795         if (hsc & 1) {
796                 lifetime = (struct sadb_lifetime *)  skb_put(skb,
797                                                              sizeof(struct sadb_lifetime));
798                 lifetime->sadb_lifetime_len =
799                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
800                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
801                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.soft_packet_limit);
802                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
803                 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
804                 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
805         }
806         /* current time */
807         lifetime = (struct sadb_lifetime *)  skb_put(skb,
808                                                      sizeof(struct sadb_lifetime));
809         lifetime->sadb_lifetime_len =
810                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
811         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
812         lifetime->sadb_lifetime_allocations = x->curlft.packets;
813         lifetime->sadb_lifetime_bytes = x->curlft.bytes;
814         lifetime->sadb_lifetime_addtime = x->curlft.add_time;
815         lifetime->sadb_lifetime_usetime = x->curlft.use_time;
816         /* src address */
817         addr = (struct sadb_address*) skb_put(skb,
818                                               sizeof(struct sadb_address)+sockaddr_size);
819         addr->sadb_address_len =
820                 (sizeof(struct sadb_address)+sockaddr_size)/
821                         sizeof(uint64_t);
822         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
823         /* "if the ports are non-zero, then the sadb_address_proto field,
824            normally zero, MUST be filled in with the transport
825            protocol's number." - RFC2367 */
826         addr->sadb_address_proto = 0;
827         addr->sadb_address_reserved = 0;
828         if (x->props.family == AF_INET) {
829                 addr->sadb_address_prefixlen = 32;
830
831                 sin = (struct sockaddr_in *) (addr + 1);
832                 sin->sin_family = AF_INET;
833                 sin->sin_addr.s_addr = x->props.saddr.a4;
834                 sin->sin_port = 0;
835                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
836         }
837 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
838         else if (x->props.family == AF_INET6) {
839                 addr->sadb_address_prefixlen = 128;
840
841                 sin6 = (struct sockaddr_in6 *) (addr + 1);
842                 sin6->sin6_family = AF_INET6;
843                 sin6->sin6_port = 0;
844                 sin6->sin6_flowinfo = 0;
845                 memcpy(&sin6->sin6_addr, x->props.saddr.a6,
846                        sizeof(struct in6_addr));
847                 sin6->sin6_scope_id = 0;
848         }
849 #endif
850         else
851                 BUG();
852
853         /* dst address */
854         addr = (struct sadb_address*) skb_put(skb,
855                                               sizeof(struct sadb_address)+sockaddr_size);
856         addr->sadb_address_len =
857                 (sizeof(struct sadb_address)+sockaddr_size)/
858                         sizeof(uint64_t);
859         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
860         addr->sadb_address_proto = 0;
861         addr->sadb_address_prefixlen = 32; /* XXX */
862         addr->sadb_address_reserved = 0;
863         if (x->props.family == AF_INET) {
864                 sin = (struct sockaddr_in *) (addr + 1);
865                 sin->sin_family = AF_INET;
866                 sin->sin_addr.s_addr = x->id.daddr.a4;
867                 sin->sin_port = 0;
868                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
869
870                 if (x->sel.saddr.a4 != x->props.saddr.a4) {
871                         addr = (struct sadb_address*) skb_put(skb,
872                                 sizeof(struct sadb_address)+sockaddr_size);
873                         addr->sadb_address_len =
874                                 (sizeof(struct sadb_address)+sockaddr_size)/
875                                 sizeof(uint64_t);
876                         addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
877                         addr->sadb_address_proto =
878                                 pfkey_proto_from_xfrm(x->sel.proto);
879                         addr->sadb_address_prefixlen = x->sel.prefixlen_s;
880                         addr->sadb_address_reserved = 0;
881
882                         sin = (struct sockaddr_in *) (addr + 1);
883                         sin->sin_family = AF_INET;
884                         sin->sin_addr.s_addr = x->sel.saddr.a4;
885                         sin->sin_port = x->sel.sport;
886                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
887                 }
888         }
889 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
890         else if (x->props.family == AF_INET6) {
891                 addr->sadb_address_prefixlen = 128;
892
893                 sin6 = (struct sockaddr_in6 *) (addr + 1);
894                 sin6->sin6_family = AF_INET6;
895                 sin6->sin6_port = 0;
896                 sin6->sin6_flowinfo = 0;
897                 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
898                 sin6->sin6_scope_id = 0;
899
900                 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
901                             sizeof(struct in6_addr))) {
902                         addr = (struct sadb_address *) skb_put(skb,
903                                 sizeof(struct sadb_address)+sockaddr_size);
904                         addr->sadb_address_len =
905                                 (sizeof(struct sadb_address)+sockaddr_size)/
906                                 sizeof(uint64_t);
907                         addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
908                         addr->sadb_address_proto =
909                                 pfkey_proto_from_xfrm(x->sel.proto);
910                         addr->sadb_address_prefixlen = x->sel.prefixlen_s;
911                         addr->sadb_address_reserved = 0;
912
913                         sin6 = (struct sockaddr_in6 *) (addr + 1);
914                         sin6->sin6_family = AF_INET6;
915                         sin6->sin6_port = x->sel.sport;
916                         sin6->sin6_flowinfo = 0;
917                         memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
918                                sizeof(struct in6_addr));
919                         sin6->sin6_scope_id = 0;
920                 }
921         }
922 #endif
923         else
924                 BUG();
925
926         /* auth key */
927         if (add_keys && auth_key_size) {
928                 key = (struct sadb_key *) skb_put(skb,
929                                                   sizeof(struct sadb_key)+auth_key_size);
930                 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
931                         sizeof(uint64_t);
932                 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
933                 key->sadb_key_bits = x->aalg->alg_key_len;
934                 key->sadb_key_reserved = 0;
935                 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
936         }
937         /* encrypt key */
938         if (add_keys && encrypt_key_size) {
939                 key = (struct sadb_key *) skb_put(skb,
940                                                   sizeof(struct sadb_key)+encrypt_key_size);
941                 key->sadb_key_len = (sizeof(struct sadb_key) +
942                                      encrypt_key_size) / sizeof(uint64_t);
943                 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
944                 key->sadb_key_bits = x->ealg->alg_key_len;
945                 key->sadb_key_reserved = 0;
946                 memcpy(key + 1, x->ealg->alg_key,
947                        (x->ealg->alg_key_len+7)/8);
948         }
949
950         /* sa */
951         sa2 = (struct sadb_x_sa2 *)  skb_put(skb, sizeof(struct sadb_x_sa2));
952         sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
953         sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
954         if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
955                 kfree_skb(skb);
956                 return ERR_PTR(-EINVAL);
957         }
958         sa2->sadb_x_sa2_mode = mode;
959         sa2->sadb_x_sa2_reserved1 = 0;
960         sa2->sadb_x_sa2_reserved2 = 0;
961         sa2->sadb_x_sa2_sequence = 0;
962         sa2->sadb_x_sa2_reqid = x->props.reqid;
963
964         if (natt && natt->encap_type) {
965                 struct sadb_x_nat_t_type *n_type;
966                 struct sadb_x_nat_t_port *n_port;
967
968                 /* type */
969                 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
970                 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
971                 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
972                 n_type->sadb_x_nat_t_type_type = natt->encap_type;
973                 n_type->sadb_x_nat_t_type_reserved[0] = 0;
974                 n_type->sadb_x_nat_t_type_reserved[1] = 0;
975                 n_type->sadb_x_nat_t_type_reserved[2] = 0;
976
977                 /* source port */
978                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
979                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
980                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
981                 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
982                 n_port->sadb_x_nat_t_port_reserved = 0;
983
984                 /* dest 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_DPORT;
988                 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
989                 n_port->sadb_x_nat_t_port_reserved = 0;
990         }
991
992         /* security context */
993         if (xfrm_ctx) {
994                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
995                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
996                 sec_ctx->sadb_x_sec_len =
997                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
998                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
999                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1000                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1001                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1002                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1003                        xfrm_ctx->ctx_len);
1004         }
1005
1006         return skb;
1007 }
1008
1009 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1010                                                 void **ext_hdrs)
1011 {
1012         struct xfrm_state *x;
1013         struct sadb_lifetime *lifetime;
1014         struct sadb_sa *sa;
1015         struct sadb_key *key;
1016         struct sadb_x_sec_ctx *sec_ctx;
1017         uint16_t proto;
1018         int err;
1019
1020
1021         sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1022         if (!sa ||
1023             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1024                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1025                 return ERR_PTR(-EINVAL);
1026         if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1027             !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1028                 return ERR_PTR(-EINVAL);
1029         if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1030             !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1031                 return ERR_PTR(-EINVAL);
1032         if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1033             !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1034                 return ERR_PTR(-EINVAL);
1035
1036         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1037         if (proto == 0)
1038                 return ERR_PTR(-EINVAL);
1039
1040         /* default error is no buffer space */
1041         err = -ENOBUFS;
1042
1043         /* RFC2367:
1044
1045    Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1046    SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1047    sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1048    Therefore, the sadb_sa_state field of all submitted SAs MUST be
1049    SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1050    not true.
1051
1052            However, KAME setkey always uses SADB_SASTATE_LARVAL.
1053            Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1054          */
1055         if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1056             (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1057              sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1058             sa->sadb_sa_encrypt > SADB_EALG_MAX)
1059                 return ERR_PTR(-EINVAL);
1060         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1061         if (key != NULL &&
1062             sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1063             ((key->sadb_key_bits+7) / 8 == 0 ||
1064              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1065                 return ERR_PTR(-EINVAL);
1066         key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1067         if (key != NULL &&
1068             sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1069             ((key->sadb_key_bits+7) / 8 == 0 ||
1070              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1071                 return ERR_PTR(-EINVAL);
1072
1073         x = xfrm_state_alloc();
1074         if (x == NULL)
1075                 return ERR_PTR(-ENOBUFS);
1076
1077         x->id.proto = proto;
1078         x->id.spi = sa->sadb_sa_spi;
1079         x->props.replay_window = sa->sadb_sa_replay;
1080         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1081                 x->props.flags |= XFRM_STATE_NOECN;
1082         if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1083                 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1084         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1085                 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1086
1087         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1088         if (lifetime != NULL) {
1089                 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1090                 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1091                 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1092                 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1093         }
1094         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1095         if (lifetime != NULL) {
1096                 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1097                 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1098                 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1099                 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1100         }
1101
1102         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1103         if (sec_ctx != NULL) {
1104                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1105
1106                 if (!uctx)
1107                         goto out;
1108
1109                 err = security_xfrm_state_alloc(x, uctx);
1110                 kfree(uctx);
1111
1112                 if (err)
1113                         goto out;
1114         }
1115
1116         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1117         if (sa->sadb_sa_auth) {
1118                 int keysize = 0;
1119                 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1120                 if (!a) {
1121                         err = -ENOSYS;
1122                         goto out;
1123                 }
1124                 if (key)
1125                         keysize = (key->sadb_key_bits + 7) / 8;
1126                 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1127                 if (!x->aalg)
1128                         goto out;
1129                 strcpy(x->aalg->alg_name, a->name);
1130                 x->aalg->alg_key_len = 0;
1131                 if (key) {
1132                         x->aalg->alg_key_len = key->sadb_key_bits;
1133                         memcpy(x->aalg->alg_key, key+1, keysize);
1134                 }
1135                 x->props.aalgo = sa->sadb_sa_auth;
1136                 /* x->algo.flags = sa->sadb_sa_flags; */
1137         }
1138         if (sa->sadb_sa_encrypt) {
1139                 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1140                         struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1141                         if (!a) {
1142                                 err = -ENOSYS;
1143                                 goto out;
1144                         }
1145                         x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1146                         if (!x->calg)
1147                                 goto out;
1148                         strcpy(x->calg->alg_name, a->name);
1149                         x->props.calgo = sa->sadb_sa_encrypt;
1150                 } else {
1151                         int keysize = 0;
1152                         struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1153                         if (!a) {
1154                                 err = -ENOSYS;
1155                                 goto out;
1156                         }
1157                         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1158                         if (key)
1159                                 keysize = (key->sadb_key_bits + 7) / 8;
1160                         x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1161                         if (!x->ealg)
1162                                 goto out;
1163                         strcpy(x->ealg->alg_name, a->name);
1164                         x->ealg->alg_key_len = 0;
1165                         if (key) {
1166                                 x->ealg->alg_key_len = key->sadb_key_bits;
1167                                 memcpy(x->ealg->alg_key, key+1, keysize);
1168                         }
1169                         x->props.ealgo = sa->sadb_sa_encrypt;
1170                 }
1171         }
1172         /* x->algo.flags = sa->sadb_sa_flags; */
1173
1174         x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1175                                                     &x->props.saddr);
1176         if (!x->props.family) {
1177                 err = -EAFNOSUPPORT;
1178                 goto out;
1179         }
1180         pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1181                                   &x->id.daddr);
1182
1183         if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1184                 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1185                 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1186                 if (mode < 0) {
1187                         err = -EINVAL;
1188                         goto out;
1189                 }
1190                 x->props.mode = mode;
1191                 x->props.reqid = sa2->sadb_x_sa2_reqid;
1192         }
1193
1194         if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1195                 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1196
1197                 /* Nobody uses this, but we try. */
1198                 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1199                 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1200         }
1201
1202         if (!x->sel.family)
1203                 x->sel.family = x->props.family;
1204
1205         if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1206                 struct sadb_x_nat_t_type* n_type;
1207                 struct xfrm_encap_tmpl *natt;
1208
1209                 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1210                 if (!x->encap)
1211                         goto out;
1212
1213                 natt = x->encap;
1214                 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1215                 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1216
1217                 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1218                         struct sadb_x_nat_t_port* n_port =
1219                                 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1220                         natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1221                 }
1222                 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1223                         struct sadb_x_nat_t_port* n_port =
1224                                 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1225                         natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1226                 }
1227         }
1228
1229         err = xfrm_init_state(x);
1230         if (err)
1231                 goto out;
1232
1233         x->km.seq = hdr->sadb_msg_seq;
1234         return x;
1235
1236 out:
1237         x->km.state = XFRM_STATE_DEAD;
1238         xfrm_state_put(x);
1239         return ERR_PTR(err);
1240 }
1241
1242 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1243 {
1244         return -EOPNOTSUPP;
1245 }
1246
1247 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1248 {
1249         struct sk_buff *resp_skb;
1250         struct sadb_x_sa2 *sa2;
1251         struct sadb_address *saddr, *daddr;
1252         struct sadb_msg *out_hdr;
1253         struct xfrm_state *x = NULL;
1254         int mode;
1255         u32 reqid;
1256         u8 proto;
1257         unsigned short family;
1258         xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1259
1260         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1261                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1262                 return -EINVAL;
1263
1264         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1265         if (proto == 0)
1266                 return -EINVAL;
1267
1268         if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1269                 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1270                 if (mode < 0)
1271                         return -EINVAL;
1272                 reqid = sa2->sadb_x_sa2_reqid;
1273         } else {
1274                 mode = 0;
1275                 reqid = 0;
1276         }
1277
1278         saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1279         daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1280
1281         family = ((struct sockaddr *)(saddr + 1))->sa_family;
1282         switch (family) {
1283         case AF_INET:
1284                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1285                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1286                 break;
1287 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1288         case AF_INET6:
1289                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1290                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1291                 break;
1292 #endif
1293         }
1294
1295         if (hdr->sadb_msg_seq) {
1296                 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1297                 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1298                         xfrm_state_put(x);
1299                         x = NULL;
1300                 }
1301         }
1302
1303         if (!x)
1304                 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1305
1306         if (x == NULL)
1307                 return -ENOENT;
1308
1309         resp_skb = ERR_PTR(-ENOENT);
1310
1311         spin_lock_bh(&x->lock);
1312         if (x->km.state != XFRM_STATE_DEAD) {
1313                 struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1314                 u32 min_spi, max_spi;
1315
1316                 if (range != NULL) {
1317                         min_spi = range->sadb_spirange_min;
1318                         max_spi = range->sadb_spirange_max;
1319                 } else {
1320                         min_spi = 0x100;
1321                         max_spi = 0x0fffffff;
1322                 }
1323                 xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi));
1324                 if (x->id.spi)
1325                         resp_skb = pfkey_xfrm_state2msg(x, 0, 3);
1326         }
1327         spin_unlock_bh(&x->lock);
1328
1329         if (IS_ERR(resp_skb)) {
1330                 xfrm_state_put(x);
1331                 return  PTR_ERR(resp_skb);
1332         }
1333
1334         out_hdr = (struct sadb_msg *) resp_skb->data;
1335         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1336         out_hdr->sadb_msg_type = SADB_GETSPI;
1337         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1338         out_hdr->sadb_msg_errno = 0;
1339         out_hdr->sadb_msg_reserved = 0;
1340         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1341         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1342
1343         xfrm_state_put(x);
1344
1345         pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1346
1347         return 0;
1348 }
1349
1350 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1351 {
1352         struct xfrm_state *x;
1353
1354         if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1355                 return -EOPNOTSUPP;
1356
1357         if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1358                 return 0;
1359
1360         x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1361         if (x == NULL)
1362                 return 0;
1363
1364         spin_lock_bh(&x->lock);
1365         if (x->km.state == XFRM_STATE_ACQ) {
1366                 x->km.state = XFRM_STATE_ERROR;
1367                 wake_up(&km_waitq);
1368         }
1369         spin_unlock_bh(&x->lock);
1370         xfrm_state_put(x);
1371         return 0;
1372 }
1373
1374 static inline int event2poltype(int event)
1375 {
1376         switch (event) {
1377         case XFRM_MSG_DELPOLICY:
1378                 return SADB_X_SPDDELETE;
1379         case XFRM_MSG_NEWPOLICY:
1380                 return SADB_X_SPDADD;
1381         case XFRM_MSG_UPDPOLICY:
1382                 return SADB_X_SPDUPDATE;
1383         case XFRM_MSG_POLEXPIRE:
1384         //      return SADB_X_SPDEXPIRE;
1385         default:
1386                 printk("pfkey: Unknown policy event %d\n", event);
1387                 break;
1388         }
1389
1390         return 0;
1391 }
1392
1393 static inline int event2keytype(int event)
1394 {
1395         switch (event) {
1396         case XFRM_MSG_DELSA:
1397                 return SADB_DELETE;
1398         case XFRM_MSG_NEWSA:
1399                 return SADB_ADD;
1400         case XFRM_MSG_UPDSA:
1401                 return SADB_UPDATE;
1402         case XFRM_MSG_EXPIRE:
1403                 return SADB_EXPIRE;
1404         default:
1405                 printk("pfkey: Unknown SA event %d\n", event);
1406                 break;
1407         }
1408
1409         return 0;
1410 }
1411
1412 /* ADD/UPD/DEL */
1413 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1414 {
1415         struct sk_buff *skb;
1416         struct sadb_msg *hdr;
1417         int hsc = 3;
1418
1419         if (c->event == XFRM_MSG_DELSA)
1420                 hsc = 0;
1421
1422         skb = pfkey_xfrm_state2msg(x, 0, hsc);
1423
1424         if (IS_ERR(skb))
1425                 return PTR_ERR(skb);
1426
1427         hdr = (struct sadb_msg *) skb->data;
1428         hdr->sadb_msg_version = PF_KEY_V2;
1429         hdr->sadb_msg_type = event2keytype(c->event);
1430         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1431         hdr->sadb_msg_errno = 0;
1432         hdr->sadb_msg_reserved = 0;
1433         hdr->sadb_msg_seq = c->seq;
1434         hdr->sadb_msg_pid = c->pid;
1435
1436         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1437
1438         return 0;
1439 }
1440
1441 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1442 {
1443         struct xfrm_state *x;
1444         int err;
1445         struct km_event c;
1446
1447         x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1448         if (IS_ERR(x))
1449                 return PTR_ERR(x);
1450
1451         xfrm_state_hold(x);
1452         if (hdr->sadb_msg_type == SADB_ADD)
1453                 err = xfrm_state_add(x);
1454         else
1455                 err = xfrm_state_update(x);
1456
1457         xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
1458                        AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x);
1459
1460         if (err < 0) {
1461                 x->km.state = XFRM_STATE_DEAD;
1462                 __xfrm_state_put(x);
1463                 goto out;
1464         }
1465
1466         if (hdr->sadb_msg_type == SADB_ADD)
1467                 c.event = XFRM_MSG_NEWSA;
1468         else
1469                 c.event = XFRM_MSG_UPDSA;
1470         c.seq = hdr->sadb_msg_seq;
1471         c.pid = hdr->sadb_msg_pid;
1472         km_state_notify(x, &c);
1473 out:
1474         xfrm_state_put(x);
1475         return err;
1476 }
1477
1478 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1479 {
1480         struct xfrm_state *x;
1481         struct km_event c;
1482         int err;
1483
1484         if (!ext_hdrs[SADB_EXT_SA-1] ||
1485             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1486                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1487                 return -EINVAL;
1488
1489         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1490         if (x == NULL)
1491                 return -ESRCH;
1492
1493         if ((err = security_xfrm_state_delete(x)))
1494                 goto out;
1495
1496         if (xfrm_state_kern(x)) {
1497                 err = -EPERM;
1498                 goto out;
1499         }
1500
1501         err = xfrm_state_delete(x);
1502
1503         if (err < 0)
1504                 goto out;
1505
1506         c.seq = hdr->sadb_msg_seq;
1507         c.pid = hdr->sadb_msg_pid;
1508         c.event = XFRM_MSG_DELSA;
1509         km_state_notify(x, &c);
1510 out:
1511         xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
1512                        AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x);
1513         xfrm_state_put(x);
1514
1515         return err;
1516 }
1517
1518 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1519 {
1520         __u8 proto;
1521         struct sk_buff *out_skb;
1522         struct sadb_msg *out_hdr;
1523         struct xfrm_state *x;
1524
1525         if (!ext_hdrs[SADB_EXT_SA-1] ||
1526             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1527                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1528                 return -EINVAL;
1529
1530         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1531         if (x == NULL)
1532                 return -ESRCH;
1533
1534         out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1535         proto = x->id.proto;
1536         xfrm_state_put(x);
1537         if (IS_ERR(out_skb))
1538                 return  PTR_ERR(out_skb);
1539
1540         out_hdr = (struct sadb_msg *) out_skb->data;
1541         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1542         out_hdr->sadb_msg_type = SADB_DUMP;
1543         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1544         out_hdr->sadb_msg_errno = 0;
1545         out_hdr->sadb_msg_reserved = 0;
1546         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1547         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1548         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1549
1550         return 0;
1551 }
1552
1553 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1554                                               gfp_t allocation)
1555 {
1556         struct sk_buff *skb;
1557         struct sadb_msg *hdr;
1558         int len, auth_len, enc_len, i;
1559
1560         auth_len = xfrm_count_auth_supported();
1561         if (auth_len) {
1562                 auth_len *= sizeof(struct sadb_alg);
1563                 auth_len += sizeof(struct sadb_supported);
1564         }
1565
1566         enc_len = xfrm_count_enc_supported();
1567         if (enc_len) {
1568                 enc_len *= sizeof(struct sadb_alg);
1569                 enc_len += sizeof(struct sadb_supported);
1570         }
1571
1572         len = enc_len + auth_len + sizeof(struct sadb_msg);
1573
1574         skb = alloc_skb(len + 16, allocation);
1575         if (!skb)
1576                 goto out_put_algs;
1577
1578         hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1579         pfkey_hdr_dup(hdr, orig);
1580         hdr->sadb_msg_errno = 0;
1581         hdr->sadb_msg_len = len / sizeof(uint64_t);
1582
1583         if (auth_len) {
1584                 struct sadb_supported *sp;
1585                 struct sadb_alg *ap;
1586
1587                 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1588                 ap = (struct sadb_alg *) (sp + 1);
1589
1590                 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1591                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1592
1593                 for (i = 0; ; i++) {
1594                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1595                         if (!aalg)
1596                                 break;
1597                         if (aalg->available)
1598                                 *ap++ = aalg->desc;
1599                 }
1600         }
1601
1602         if (enc_len) {
1603                 struct sadb_supported *sp;
1604                 struct sadb_alg *ap;
1605
1606                 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1607                 ap = (struct sadb_alg *) (sp + 1);
1608
1609                 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1610                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1611
1612                 for (i = 0; ; i++) {
1613                         struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1614                         if (!ealg)
1615                                 break;
1616                         if (ealg->available)
1617                                 *ap++ = ealg->desc;
1618                 }
1619         }
1620
1621 out_put_algs:
1622         return skb;
1623 }
1624
1625 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1626 {
1627         struct pfkey_sock *pfk = pfkey_sk(sk);
1628         struct sk_buff *supp_skb;
1629
1630         if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1631                 return -EINVAL;
1632
1633         if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1634                 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1635                         return -EEXIST;
1636                 pfk->registered |= (1<<hdr->sadb_msg_satype);
1637         }
1638
1639         xfrm_probe_algs();
1640
1641         supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1642         if (!supp_skb) {
1643                 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1644                         pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1645
1646                 return -ENOBUFS;
1647         }
1648
1649         pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1650
1651         return 0;
1652 }
1653
1654 static int key_notify_sa_flush(struct km_event *c)
1655 {
1656         struct sk_buff *skb;
1657         struct sadb_msg *hdr;
1658
1659         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1660         if (!skb)
1661                 return -ENOBUFS;
1662         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1663         hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1664         hdr->sadb_msg_type = SADB_FLUSH;
1665         hdr->sadb_msg_seq = c->seq;
1666         hdr->sadb_msg_pid = c->pid;
1667         hdr->sadb_msg_version = PF_KEY_V2;
1668         hdr->sadb_msg_errno = (uint8_t) 0;
1669         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1670
1671         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1672
1673         return 0;
1674 }
1675
1676 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1677 {
1678         unsigned proto;
1679         struct km_event c;
1680         struct xfrm_audit audit_info;
1681         int err;
1682
1683         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1684         if (proto == 0)
1685                 return -EINVAL;
1686
1687         audit_info.loginuid = audit_get_loginuid(current->audit_context);
1688         audit_info.secid = 0;
1689         err = xfrm_state_flush(proto, &audit_info);
1690         if (err)
1691                 return err;
1692         c.data.proto = proto;
1693         c.seq = hdr->sadb_msg_seq;
1694         c.pid = hdr->sadb_msg_pid;
1695         c.event = XFRM_MSG_FLUSHSA;
1696         km_state_notify(NULL, &c);
1697
1698         return 0;
1699 }
1700
1701 struct pfkey_dump_data
1702 {
1703         struct sk_buff *skb;
1704         struct sadb_msg *hdr;
1705         struct sock *sk;
1706 };
1707
1708 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1709 {
1710         struct pfkey_dump_data *data = ptr;
1711         struct sk_buff *out_skb;
1712         struct sadb_msg *out_hdr;
1713
1714         out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1715         if (IS_ERR(out_skb))
1716                 return PTR_ERR(out_skb);
1717
1718         out_hdr = (struct sadb_msg *) out_skb->data;
1719         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1720         out_hdr->sadb_msg_type = SADB_DUMP;
1721         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1722         out_hdr->sadb_msg_errno = 0;
1723         out_hdr->sadb_msg_reserved = 0;
1724         out_hdr->sadb_msg_seq = count;
1725         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1726         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1727         return 0;
1728 }
1729
1730 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1731 {
1732         u8 proto;
1733         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1734
1735         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1736         if (proto == 0)
1737                 return -EINVAL;
1738
1739         return xfrm_state_walk(proto, dump_sa, &data);
1740 }
1741
1742 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1743 {
1744         struct pfkey_sock *pfk = pfkey_sk(sk);
1745         int satype = hdr->sadb_msg_satype;
1746
1747         if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1748                 /* XXX we mangle packet... */
1749                 hdr->sadb_msg_errno = 0;
1750                 if (satype != 0 && satype != 1)
1751                         return -EINVAL;
1752                 pfk->promisc = satype;
1753         }
1754         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1755         return 0;
1756 }
1757
1758 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1759 {
1760         int i;
1761         u32 reqid = *(u32*)ptr;
1762
1763         for (i=0; i<xp->xfrm_nr; i++) {
1764                 if (xp->xfrm_vec[i].reqid == reqid)
1765                         return -EEXIST;
1766         }
1767         return 0;
1768 }
1769
1770 static u32 gen_reqid(void)
1771 {
1772         u32 start;
1773         static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1774
1775         start = reqid;
1776         do {
1777                 ++reqid;
1778                 if (reqid == 0)
1779                         reqid = IPSEC_MANUAL_REQID_MAX+1;
1780                 if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid,
1781                                      (void*)&reqid) != -EEXIST)
1782                         return reqid;
1783         } while (reqid != start);
1784         return 0;
1785 }
1786
1787 static int
1788 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1789 {
1790         struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1791         struct sockaddr_in *sin;
1792 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1793         struct sockaddr_in6 *sin6;
1794 #endif
1795         int mode;
1796
1797         if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1798                 return -ELOOP;
1799
1800         if (rq->sadb_x_ipsecrequest_mode == 0)
1801                 return -EINVAL;
1802
1803         t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1804         if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1805                 return -EINVAL;
1806         t->mode = mode;
1807         if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1808                 t->optional = 1;
1809         else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1810                 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1811                 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1812                         t->reqid = 0;
1813                 if (!t->reqid && !(t->reqid = gen_reqid()))
1814                         return -ENOBUFS;
1815         }
1816
1817         /* addresses present only in tunnel mode */
1818         if (t->mode == XFRM_MODE_TUNNEL) {
1819                 struct sockaddr *sa;
1820                 sa = (struct sockaddr *)(rq+1);
1821                 switch(sa->sa_family) {
1822                 case AF_INET:
1823                         sin = (struct sockaddr_in*)sa;
1824                         t->saddr.a4 = sin->sin_addr.s_addr;
1825                         sin++;
1826                         if (sin->sin_family != AF_INET)
1827                                 return -EINVAL;
1828                         t->id.daddr.a4 = sin->sin_addr.s_addr;
1829                         break;
1830 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1831                 case AF_INET6:
1832                         sin6 = (struct sockaddr_in6*)sa;
1833                         memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1834                         sin6++;
1835                         if (sin6->sin6_family != AF_INET6)
1836                                 return -EINVAL;
1837                         memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1838                         break;
1839 #endif
1840                 default:
1841                         return -EINVAL;
1842                 }
1843                 t->encap_family = sa->sa_family;
1844         } else
1845                 t->encap_family = xp->family;
1846
1847         /* No way to set this via kame pfkey */
1848         t->aalgos = t->ealgos = t->calgos = ~0;
1849         xp->xfrm_nr++;
1850         return 0;
1851 }
1852
1853 static int
1854 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1855 {
1856         int err;
1857         int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1858         struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1859
1860         while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1861                 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1862                         return err;
1863                 len -= rq->sadb_x_ipsecrequest_len;
1864                 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1865         }
1866         return 0;
1867 }
1868
1869 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1870 {
1871   struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1872
1873         if (xfrm_ctx) {
1874                 int len = sizeof(struct sadb_x_sec_ctx);
1875                 len += xfrm_ctx->ctx_len;
1876                 return PFKEY_ALIGN8(len);
1877         }
1878         return 0;
1879 }
1880
1881 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1882 {
1883         struct xfrm_tmpl *t;
1884         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1885         int socklen = 0;
1886         int i;
1887
1888         for (i=0; i<xp->xfrm_nr; i++) {
1889                 t = xp->xfrm_vec + i;
1890                 socklen += (t->encap_family == AF_INET ?
1891                             sizeof(struct sockaddr_in) :
1892                             sizeof(struct sockaddr_in6));
1893         }
1894
1895         return sizeof(struct sadb_msg) +
1896                 (sizeof(struct sadb_lifetime) * 3) +
1897                 (sizeof(struct sadb_address) * 2) +
1898                 (sockaddr_size * 2) +
1899                 sizeof(struct sadb_x_policy) +
1900                 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1901                 (socklen * 2) +
1902                 pfkey_xfrm_policy2sec_ctx_size(xp);
1903 }
1904
1905 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1906 {
1907         struct sk_buff *skb;
1908         int size;
1909
1910         size = pfkey_xfrm_policy2msg_size(xp);
1911
1912         skb =  alloc_skb(size + 16, GFP_ATOMIC);
1913         if (skb == NULL)
1914                 return ERR_PTR(-ENOBUFS);
1915
1916         return skb;
1917 }
1918
1919 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1920 {
1921         struct sadb_msg *hdr;
1922         struct sadb_address *addr;
1923         struct sadb_lifetime *lifetime;
1924         struct sadb_x_policy *pol;
1925         struct sockaddr_in   *sin;
1926         struct sadb_x_sec_ctx *sec_ctx;
1927         struct xfrm_sec_ctx *xfrm_ctx;
1928 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1929         struct sockaddr_in6  *sin6;
1930 #endif
1931         int i;
1932         int size;
1933         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1934         int socklen = (xp->family == AF_INET ?
1935                        sizeof(struct sockaddr_in) :
1936                        sizeof(struct sockaddr_in6));
1937
1938         size = pfkey_xfrm_policy2msg_size(xp);
1939
1940         /* call should fill header later */
1941         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1942         memset(hdr, 0, size);   /* XXX do we need this ? */
1943
1944         /* src address */
1945         addr = (struct sadb_address*) skb_put(skb,
1946                                               sizeof(struct sadb_address)+sockaddr_size);
1947         addr->sadb_address_len =
1948                 (sizeof(struct sadb_address)+sockaddr_size)/
1949                         sizeof(uint64_t);
1950         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1951         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1952         addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1953         addr->sadb_address_reserved = 0;
1954         /* src address */
1955         if (xp->family == AF_INET) {
1956                 sin = (struct sockaddr_in *) (addr + 1);
1957                 sin->sin_family = AF_INET;
1958                 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1959                 sin->sin_port = xp->selector.sport;
1960                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1961         }
1962 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1963         else if (xp->family == AF_INET6) {
1964                 sin6 = (struct sockaddr_in6 *) (addr + 1);
1965                 sin6->sin6_family = AF_INET6;
1966                 sin6->sin6_port = xp->selector.sport;
1967                 sin6->sin6_flowinfo = 0;
1968                 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1969                        sizeof(struct in6_addr));
1970                 sin6->sin6_scope_id = 0;
1971         }
1972 #endif
1973         else
1974                 BUG();
1975
1976         /* dst address */
1977         addr = (struct sadb_address*) skb_put(skb,
1978                                               sizeof(struct sadb_address)+sockaddr_size);
1979         addr->sadb_address_len =
1980                 (sizeof(struct sadb_address)+sockaddr_size)/
1981                         sizeof(uint64_t);
1982         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1983         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1984         addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1985         addr->sadb_address_reserved = 0;
1986         if (xp->family == AF_INET) {
1987                 sin = (struct sockaddr_in *) (addr + 1);
1988                 sin->sin_family = AF_INET;
1989                 sin->sin_addr.s_addr = xp->selector.daddr.a4;
1990                 sin->sin_port = xp->selector.dport;
1991                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1992         }
1993 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1994         else if (xp->family == AF_INET6) {
1995                 sin6 = (struct sockaddr_in6 *) (addr + 1);
1996                 sin6->sin6_family = AF_INET6;
1997                 sin6->sin6_port = xp->selector.dport;
1998                 sin6->sin6_flowinfo = 0;
1999                 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2000                        sizeof(struct in6_addr));
2001                 sin6->sin6_scope_id = 0;
2002         }
2003 #endif
2004         else
2005                 BUG();
2006
2007         /* hard time */
2008         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2009                                                      sizeof(struct sadb_lifetime));
2010         lifetime->sadb_lifetime_len =
2011                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2012         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2013         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.hard_packet_limit);
2014         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2015         lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2016         lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2017         /* soft time */
2018         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2019                                                      sizeof(struct sadb_lifetime));
2020         lifetime->sadb_lifetime_len =
2021                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2022         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2023         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.soft_packet_limit);
2024         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2025         lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2026         lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2027         /* current time */
2028         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2029                                                      sizeof(struct sadb_lifetime));
2030         lifetime->sadb_lifetime_len =
2031                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2032         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2033         lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2034         lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2035         lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2036         lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2037
2038         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
2039         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2040         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2041         pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2042         if (xp->action == XFRM_POLICY_ALLOW) {
2043                 if (xp->xfrm_nr)
2044                         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2045                 else
2046                         pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2047         }
2048         pol->sadb_x_policy_dir = dir+1;
2049         pol->sadb_x_policy_id = xp->index;
2050         pol->sadb_x_policy_priority = xp->priority;
2051
2052         for (i=0; i<xp->xfrm_nr; i++) {
2053                 struct sadb_x_ipsecrequest *rq;
2054                 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2055                 int req_size;
2056                 int mode;
2057
2058                 req_size = sizeof(struct sadb_x_ipsecrequest);
2059                 if (t->mode == XFRM_MODE_TUNNEL)
2060                         req_size += ((t->encap_family == AF_INET ?
2061                                      sizeof(struct sockaddr_in) :
2062                                      sizeof(struct sockaddr_in6)) * 2);
2063                 else
2064                         size -= 2*socklen;
2065                 rq = (void*)skb_put(skb, req_size);
2066                 pol->sadb_x_policy_len += req_size/8;
2067                 memset(rq, 0, sizeof(*rq));
2068                 rq->sadb_x_ipsecrequest_len = req_size;
2069                 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2070                 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2071                         return -EINVAL;
2072                 rq->sadb_x_ipsecrequest_mode = mode;
2073                 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2074                 if (t->reqid)
2075                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2076                 if (t->optional)
2077                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2078                 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2079                 if (t->mode == XFRM_MODE_TUNNEL) {
2080                         switch (t->encap_family) {
2081                         case AF_INET:
2082                                 sin = (void*)(rq+1);
2083                                 sin->sin_family = AF_INET;
2084                                 sin->sin_addr.s_addr = t->saddr.a4;
2085                                 sin->sin_port = 0;
2086                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2087                                 sin++;
2088                                 sin->sin_family = AF_INET;
2089                                 sin->sin_addr.s_addr = t->id.daddr.a4;
2090                                 sin->sin_port = 0;
2091                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2092                                 break;
2093 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2094                         case AF_INET6:
2095                                 sin6 = (void*)(rq+1);
2096                                 sin6->sin6_family = AF_INET6;
2097                                 sin6->sin6_port = 0;
2098                                 sin6->sin6_flowinfo = 0;
2099                                 memcpy(&sin6->sin6_addr, t->saddr.a6,
2100                                        sizeof(struct in6_addr));
2101                                 sin6->sin6_scope_id = 0;
2102
2103                                 sin6++;
2104                                 sin6->sin6_family = AF_INET6;
2105                                 sin6->sin6_port = 0;
2106                                 sin6->sin6_flowinfo = 0;
2107                                 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2108                                        sizeof(struct in6_addr));
2109                                 sin6->sin6_scope_id = 0;
2110                                 break;
2111 #endif
2112                         default:
2113                                 break;
2114                         }
2115                 }
2116         }
2117
2118         /* security context */
2119         if ((xfrm_ctx = xp->security)) {
2120                 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2121
2122                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2123                 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2124                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2125                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2126                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2127                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2128                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2129                        xfrm_ctx->ctx_len);
2130         }
2131
2132         hdr->sadb_msg_len = size / sizeof(uint64_t);
2133         hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2134
2135         return 0;
2136 }
2137
2138 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2139 {
2140         struct sk_buff *out_skb;
2141         struct sadb_msg *out_hdr;
2142         int err;
2143
2144         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2145         if (IS_ERR(out_skb)) {
2146                 err = PTR_ERR(out_skb);
2147                 goto out;
2148         }
2149         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2150         if (err < 0)
2151                 return err;
2152
2153         out_hdr = (struct sadb_msg *) out_skb->data;
2154         out_hdr->sadb_msg_version = PF_KEY_V2;
2155
2156         if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2157                 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2158         else
2159                 out_hdr->sadb_msg_type = event2poltype(c->event);
2160         out_hdr->sadb_msg_errno = 0;
2161         out_hdr->sadb_msg_seq = c->seq;
2162         out_hdr->sadb_msg_pid = c->pid;
2163         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2164 out:
2165         return 0;
2166
2167 }
2168
2169 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2170 {
2171         int err = 0;
2172         struct sadb_lifetime *lifetime;
2173         struct sadb_address *sa;
2174         struct sadb_x_policy *pol;
2175         struct xfrm_policy *xp;
2176         struct km_event c;
2177         struct sadb_x_sec_ctx *sec_ctx;
2178
2179         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2180                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2181             !ext_hdrs[SADB_X_EXT_POLICY-1])
2182                 return -EINVAL;
2183
2184         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2185         if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2186                 return -EINVAL;
2187         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2188                 return -EINVAL;
2189
2190         xp = xfrm_policy_alloc(GFP_KERNEL);
2191         if (xp == NULL)
2192                 return -ENOBUFS;
2193
2194         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2195                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2196         xp->priority = pol->sadb_x_policy_priority;
2197
2198         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2199         xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2200         if (!xp->family) {
2201                 err = -EINVAL;
2202                 goto out;
2203         }
2204         xp->selector.family = xp->family;
2205         xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2206         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2207         xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2208         if (xp->selector.sport)
2209                 xp->selector.sport_mask = htons(0xffff);
2210
2211         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2212         pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2213         xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2214
2215         /* Amusing, we set this twice.  KAME apps appear to set same value
2216          * in both addresses.
2217          */
2218         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2219
2220         xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2221         if (xp->selector.dport)
2222                 xp->selector.dport_mask = htons(0xffff);
2223
2224         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2225         if (sec_ctx != NULL) {
2226                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2227
2228                 if (!uctx) {
2229                         err = -ENOBUFS;
2230                         goto out;
2231                 }
2232
2233                 err = security_xfrm_policy_alloc(xp, uctx);
2234                 kfree(uctx);
2235
2236                 if (err)
2237                         goto out;
2238         }
2239
2240         xp->lft.soft_byte_limit = XFRM_INF;
2241         xp->lft.hard_byte_limit = XFRM_INF;
2242         xp->lft.soft_packet_limit = XFRM_INF;
2243         xp->lft.hard_packet_limit = XFRM_INF;
2244         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2245                 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2246                 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2247                 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2248                 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2249         }
2250         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2251                 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2252                 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2253                 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2254                 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2255         }
2256         xp->xfrm_nr = 0;
2257         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2258             (err = parse_ipsecrequests(xp, pol)) < 0)
2259                 goto out;
2260
2261         err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2262                                  hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2263
2264         xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2265                        AUDIT_MAC_IPSEC_ADDSPD, err ? 0 : 1, xp, NULL);
2266
2267         if (err)
2268                 goto out;
2269
2270         if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2271                 c.event = XFRM_MSG_UPDPOLICY;
2272         else
2273                 c.event = XFRM_MSG_NEWPOLICY;
2274
2275         c.seq = hdr->sadb_msg_seq;
2276         c.pid = hdr->sadb_msg_pid;
2277
2278         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2279         xfrm_pol_put(xp);
2280         return 0;
2281
2282 out:
2283         security_xfrm_policy_free(xp);
2284         kfree(xp);
2285         return err;
2286 }
2287
2288 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2289 {
2290         int err;
2291         struct sadb_address *sa;
2292         struct sadb_x_policy *pol;
2293         struct xfrm_policy *xp, tmp;
2294         struct xfrm_selector sel;
2295         struct km_event c;
2296         struct sadb_x_sec_ctx *sec_ctx;
2297
2298         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2299                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2300             !ext_hdrs[SADB_X_EXT_POLICY-1])
2301                 return -EINVAL;
2302
2303         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2304         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2305                 return -EINVAL;
2306
2307         memset(&sel, 0, sizeof(sel));
2308
2309         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2310         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2311         sel.prefixlen_s = sa->sadb_address_prefixlen;
2312         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2313         sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2314         if (sel.sport)
2315                 sel.sport_mask = htons(0xffff);
2316
2317         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2318         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2319         sel.prefixlen_d = sa->sadb_address_prefixlen;
2320         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2321         sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2322         if (sel.dport)
2323                 sel.dport_mask = htons(0xffff);
2324
2325         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2326         memset(&tmp, 0, sizeof(struct xfrm_policy));
2327
2328         if (sec_ctx != NULL) {
2329                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2330
2331                 if (!uctx)
2332                         return -ENOMEM;
2333
2334                 err = security_xfrm_policy_alloc(&tmp, uctx);
2335                 kfree(uctx);
2336
2337                 if (err)
2338                         return err;
2339         }
2340
2341         xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
2342                                    &sel, tmp.security, 1, &err);
2343         security_xfrm_policy_free(&tmp);
2344
2345         if (xp == NULL)
2346                 return -ENOENT;
2347
2348         xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2349                        AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
2350
2351         if (err)
2352                 goto out;
2353
2354         c.seq = hdr->sadb_msg_seq;
2355         c.pid = hdr->sadb_msg_pid;
2356         c.event = XFRM_MSG_DELPOLICY;
2357         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2358
2359 out:
2360         xfrm_pol_put(xp);
2361         return err;
2362 }
2363
2364 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2365 {
2366         int err;
2367         struct sk_buff *out_skb;
2368         struct sadb_msg *out_hdr;
2369         err = 0;
2370
2371         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2372         if (IS_ERR(out_skb)) {
2373                 err =  PTR_ERR(out_skb);
2374                 goto out;
2375         }
2376         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2377         if (err < 0)
2378                 goto out;
2379
2380         out_hdr = (struct sadb_msg *) out_skb->data;
2381         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2382         out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2383         out_hdr->sadb_msg_satype = 0;
2384         out_hdr->sadb_msg_errno = 0;
2385         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2386         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2387         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2388         err = 0;
2389
2390 out:
2391         return err;
2392 }
2393
2394 #ifdef CONFIG_NET_KEY_MIGRATE
2395 static int pfkey_sockaddr_pair_size(sa_family_t family)
2396 {
2397         switch (family) {
2398         case AF_INET:
2399                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2400 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2401         case AF_INET6:
2402                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2403 #endif
2404         default:
2405                 return 0;
2406         }
2407         /* NOTREACHED */
2408 }
2409
2410 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2411                                xfrm_address_t *saddr, xfrm_address_t *daddr,
2412                                u16 *family)
2413 {
2414         struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2415         if (rq->sadb_x_ipsecrequest_len <
2416             pfkey_sockaddr_pair_size(sa->sa_family))
2417                 return -EINVAL;
2418
2419         switch (sa->sa_family) {
2420         case AF_INET:
2421                 {
2422                         struct sockaddr_in *sin;
2423                         sin = (struct sockaddr_in *)sa;
2424                         if ((sin+1)->sin_family != AF_INET)
2425                                 return -EINVAL;
2426                         memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2427                         sin++;
2428                         memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2429                         *family = AF_INET;
2430                         break;
2431                 }
2432 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2433         case AF_INET6:
2434                 {
2435                         struct sockaddr_in6 *sin6;
2436                         sin6 = (struct sockaddr_in6 *)sa;
2437                         if ((sin6+1)->sin6_family != AF_INET6)
2438                                 return -EINVAL;
2439                         memcpy(&saddr->a6, &sin6->sin6_addr,
2440                                sizeof(saddr->a6));
2441                         sin6++;
2442                         memcpy(&daddr->a6, &sin6->sin6_addr,
2443                                sizeof(daddr->a6));
2444                         *family = AF_INET6;
2445                         break;
2446                 }
2447 #endif
2448         default:
2449                 return -EINVAL;
2450         }
2451
2452         return 0;
2453 }
2454
2455 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2456                                     struct xfrm_migrate *m)
2457 {
2458         int err;
2459         struct sadb_x_ipsecrequest *rq2;
2460         int mode;
2461
2462         if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2463             len < rq1->sadb_x_ipsecrequest_len)
2464                 return -EINVAL;
2465
2466         /* old endoints */
2467         err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2468                                   &m->old_family);
2469         if (err)
2470                 return err;
2471
2472         rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2473         len -= rq1->sadb_x_ipsecrequest_len;
2474
2475         if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2476             len < rq2->sadb_x_ipsecrequest_len)
2477                 return -EINVAL;
2478
2479         /* new endpoints */
2480         err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2481                                   &m->new_family);
2482         if (err)
2483                 return err;
2484
2485         if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2486             rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2487             rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2488                 return -EINVAL;
2489
2490         m->proto = rq1->sadb_x_ipsecrequest_proto;
2491         if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2492                 return -EINVAL;
2493         m->mode = mode;
2494         m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2495
2496         return ((int)(rq1->sadb_x_ipsecrequest_len +
2497                       rq2->sadb_x_ipsecrequest_len));
2498 }
2499
2500 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2501                          struct sadb_msg *hdr, void **ext_hdrs)
2502 {
2503         int i, len, ret, err = -EINVAL;
2504         u8 dir;
2505         struct sadb_address *sa;
2506         struct sadb_x_policy *pol;
2507         struct sadb_x_ipsecrequest *rq;
2508         struct xfrm_selector sel;
2509         struct xfrm_migrate m[XFRM_MAX_DEPTH];
2510
2511         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2512             ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2513             !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2514                 err = -EINVAL;
2515                 goto out;
2516         }
2517
2518         pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2519         if (!pol) {
2520                 err = -EINVAL;
2521                 goto out;
2522         }
2523
2524         if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2525                 err = -EINVAL;
2526                 goto out;
2527         }
2528
2529         dir = pol->sadb_x_policy_dir - 1;
2530         memset(&sel, 0, sizeof(sel));
2531
2532         /* set source address info of selector */
2533         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2534         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2535         sel.prefixlen_s = sa->sadb_address_prefixlen;
2536         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2537         sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2538         if (sel.sport)
2539                 sel.sport_mask = htons(0xffff);
2540
2541         /* set destination address info of selector */
2542         sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2543         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2544         sel.prefixlen_d = sa->sadb_address_prefixlen;
2545         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2546         sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2547         if (sel.dport)
2548                 sel.dport_mask = htons(0xffff);
2549
2550         rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2551
2552         /* extract ipsecrequests */
2553         i = 0;
2554         len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2555
2556         while (len > 0 && i < XFRM_MAX_DEPTH) {
2557                 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2558                 if (ret < 0) {
2559                         err = ret;
2560                         goto out;
2561                 } else {
2562                         rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2563                         len -= ret;
2564                         i++;
2565                 }
2566         }
2567
2568         if (!i || len > 0) {
2569                 err = -EINVAL;
2570                 goto out;
2571         }
2572
2573         return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2574
2575  out:
2576         return err;
2577 }
2578 #else
2579 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2580                          struct sadb_msg *hdr, void **ext_hdrs)
2581 {
2582         return -ENOPROTOOPT;
2583 }
2584 #endif
2585
2586
2587 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2588 {
2589         unsigned int dir;
2590         int err = 0, delete;
2591         struct sadb_x_policy *pol;
2592         struct xfrm_policy *xp;
2593         struct km_event c;
2594
2595         if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2596                 return -EINVAL;
2597
2598         dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2599         if (dir >= XFRM_POLICY_MAX)
2600                 return -EINVAL;
2601
2602         delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2603         xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2604                               delete, &err);
2605         if (xp == NULL)
2606                 return -ENOENT;
2607
2608         if (delete) {
2609                 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2610                                AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
2611
2612                 if (err)
2613                         goto out;
2614                 c.seq = hdr->sadb_msg_seq;
2615                 c.pid = hdr->sadb_msg_pid;
2616                 c.data.byid = 1;
2617                 c.event = XFRM_MSG_DELPOLICY;
2618                 km_policy_notify(xp, dir, &c);
2619         } else {
2620                 err = key_pol_get_resp(sk, xp, hdr, dir);
2621         }
2622
2623 out:
2624         xfrm_pol_put(xp);
2625         return err;
2626 }
2627
2628 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2629 {
2630         struct pfkey_dump_data *data = ptr;
2631         struct sk_buff *out_skb;
2632         struct sadb_msg *out_hdr;
2633         int err;
2634
2635         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2636         if (IS_ERR(out_skb))
2637                 return PTR_ERR(out_skb);
2638
2639         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2640         if (err < 0)
2641                 return err;
2642
2643         out_hdr = (struct sadb_msg *) out_skb->data;
2644         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2645         out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2646         out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2647         out_hdr->sadb_msg_errno = 0;
2648         out_hdr->sadb_msg_seq = count;
2649         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2650         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2651         return 0;
2652 }
2653
2654 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2655 {
2656         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2657
2658         return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data);
2659 }
2660
2661 static int key_notify_policy_flush(struct km_event *c)
2662 {
2663         struct sk_buff *skb_out;
2664         struct sadb_msg *hdr;
2665
2666         skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2667         if (!skb_out)
2668                 return -ENOBUFS;
2669         hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2670         hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2671         hdr->sadb_msg_seq = c->seq;
2672         hdr->sadb_msg_pid = c->pid;
2673         hdr->sadb_msg_version = PF_KEY_V2;
2674         hdr->sadb_msg_errno = (uint8_t) 0;
2675         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2676         pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2677         return 0;
2678
2679 }
2680
2681 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2682 {
2683         struct km_event c;
2684         struct xfrm_audit audit_info;
2685         int err;
2686
2687         audit_info.loginuid = audit_get_loginuid(current->audit_context);
2688         audit_info.secid = 0;
2689         err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2690         if (err)
2691                 return err;
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_reset_transport_header(skb);
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);