a065e1a67773f88e2db0e170a925e3457cffe7e0
[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
31 #include <net/sock.h>
32
33 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
34 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
35
36
37 /* List of all pfkey sockets. */
38 static HLIST_HEAD(pfkey_table);
39 static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
40 static DEFINE_RWLOCK(pfkey_table_lock);
41 static atomic_t pfkey_table_users = ATOMIC_INIT(0);
42
43 static atomic_t pfkey_socks_nr = ATOMIC_INIT(0);
44
45 struct pfkey_sock {
46         /* struct sock must be the first member of struct pfkey_sock */
47         struct sock     sk;
48         int             registered;
49         int             promisc;
50 };
51
52 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
53 {
54         return (struct pfkey_sock *)sk;
55 }
56
57 static void pfkey_sock_destruct(struct sock *sk)
58 {
59         skb_queue_purge(&sk->sk_receive_queue);
60
61         if (!sock_flag(sk, SOCK_DEAD)) {
62                 printk("Attempt to release alive pfkey socket: %p\n", sk);
63                 return;
64         }
65
66         BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
67         BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
68
69         atomic_dec(&pfkey_socks_nr);
70 }
71
72 static void pfkey_table_grab(void)
73 {
74         write_lock_bh(&pfkey_table_lock);
75
76         if (atomic_read(&pfkey_table_users)) {
77                 DECLARE_WAITQUEUE(wait, current);
78
79                 add_wait_queue_exclusive(&pfkey_table_wait, &wait);
80                 for(;;) {
81                         set_current_state(TASK_UNINTERRUPTIBLE);
82                         if (atomic_read(&pfkey_table_users) == 0)
83                                 break;
84                         write_unlock_bh(&pfkey_table_lock);
85                         schedule();
86                         write_lock_bh(&pfkey_table_lock);
87                 }
88
89                 __set_current_state(TASK_RUNNING);
90                 remove_wait_queue(&pfkey_table_wait, &wait);
91         }
92 }
93
94 static __inline__ void pfkey_table_ungrab(void)
95 {
96         write_unlock_bh(&pfkey_table_lock);
97         wake_up(&pfkey_table_wait);
98 }
99
100 static __inline__ void pfkey_lock_table(void)
101 {
102         /* read_lock() synchronizes us to pfkey_table_grab */
103
104         read_lock(&pfkey_table_lock);
105         atomic_inc(&pfkey_table_users);
106         read_unlock(&pfkey_table_lock);
107 }
108
109 static __inline__ void pfkey_unlock_table(void)
110 {
111         if (atomic_dec_and_test(&pfkey_table_users))
112                 wake_up(&pfkey_table_wait);
113 }
114
115
116 static const struct proto_ops pfkey_ops;
117
118 static void pfkey_insert(struct sock *sk)
119 {
120         pfkey_table_grab();
121         sk_add_node(sk, &pfkey_table);
122         pfkey_table_ungrab();
123 }
124
125 static void pfkey_remove(struct sock *sk)
126 {
127         pfkey_table_grab();
128         sk_del_node_init(sk);
129         pfkey_table_ungrab();
130 }
131
132 static struct proto key_proto = {
133         .name     = "KEY",
134         .owner    = THIS_MODULE,
135         .obj_size = sizeof(struct pfkey_sock),
136 };
137
138 static int pfkey_create(struct socket *sock, int protocol)
139 {
140         struct sock *sk;
141         int err;
142
143         if (!capable(CAP_NET_ADMIN))
144                 return -EPERM;
145         if (sock->type != SOCK_RAW)
146                 return -ESOCKTNOSUPPORT;
147         if (protocol != PF_KEY_V2)
148                 return -EPROTONOSUPPORT;
149
150         err = -ENOMEM;
151         sk = sk_alloc(PF_KEY, GFP_KERNEL, &key_proto, 1);
152         if (sk == NULL)
153                 goto out;
154         
155         sock->ops = &pfkey_ops;
156         sock_init_data(sock, sk);
157
158         sk->sk_family = PF_KEY;
159         sk->sk_destruct = pfkey_sock_destruct;
160
161         atomic_inc(&pfkey_socks_nr);
162
163         pfkey_insert(sk);
164
165         return 0;
166 out:
167         return err;
168 }
169
170 static int pfkey_release(struct socket *sock)
171 {
172         struct sock *sk = sock->sk;
173
174         if (!sk)
175                 return 0;
176
177         pfkey_remove(sk);
178
179         sock_orphan(sk);
180         sock->sk = NULL;
181         skb_queue_purge(&sk->sk_write_queue);
182         sock_put(sk);
183
184         return 0;
185 }
186
187 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
188                                gfp_t allocation, struct sock *sk)
189 {
190         int err = -ENOBUFS;
191
192         sock_hold(sk);
193         if (*skb2 == NULL) {
194                 if (atomic_read(&skb->users) != 1) {
195                         *skb2 = skb_clone(skb, allocation);
196                 } else {
197                         *skb2 = skb;
198                         atomic_inc(&skb->users);
199                 }
200         }
201         if (*skb2 != NULL) {
202                 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
203                         skb_orphan(*skb2);
204                         skb_set_owner_r(*skb2, sk);
205                         skb_queue_tail(&sk->sk_receive_queue, *skb2);
206                         sk->sk_data_ready(sk, (*skb2)->len);
207                         *skb2 = NULL;
208                         err = 0;
209                 }
210         }
211         sock_put(sk);
212         return err;
213 }
214
215 /* Send SKB to all pfkey sockets matching selected criteria.  */
216 #define BROADCAST_ALL           0
217 #define BROADCAST_ONE           1
218 #define BROADCAST_REGISTERED    2
219 #define BROADCAST_PROMISC_ONLY  4
220 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
221                            int broadcast_flags, struct sock *one_sk)
222 {
223         struct sock *sk;
224         struct hlist_node *node;
225         struct sk_buff *skb2 = NULL;
226         int err = -ESRCH;
227
228         /* XXX Do we need something like netlink_overrun?  I think
229          * XXX PF_KEY socket apps will not mind current behavior.
230          */
231         if (!skb)
232                 return -ENOMEM;
233
234         pfkey_lock_table();
235         sk_for_each(sk, node, &pfkey_table) {
236                 struct pfkey_sock *pfk = pfkey_sk(sk);
237                 int err2;
238
239                 /* Yes, it means that if you are meant to receive this
240                  * pfkey message you receive it twice as promiscuous
241                  * socket.
242                  */
243                 if (pfk->promisc)
244                         pfkey_broadcast_one(skb, &skb2, allocation, sk);
245
246                 /* the exact target will be processed later */
247                 if (sk == one_sk)
248                         continue;
249                 if (broadcast_flags != BROADCAST_ALL) {
250                         if (broadcast_flags & BROADCAST_PROMISC_ONLY)
251                                 continue;
252                         if ((broadcast_flags & BROADCAST_REGISTERED) &&
253                             !pfk->registered)
254                                 continue;
255                         if (broadcast_flags & BROADCAST_ONE)
256                                 continue;
257                 }
258
259                 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
260
261                 /* Error is cleare after succecful sending to at least one
262                  * registered KM */
263                 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
264                         err = err2;
265         }
266         pfkey_unlock_table();
267
268         if (one_sk != NULL)
269                 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
270
271         if (skb2)
272                 kfree_skb(skb2);
273         kfree_skb(skb);
274         return err;
275 }
276
277 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
278 {
279         *new = *orig;
280 }
281
282 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
283 {
284         struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
285         struct sadb_msg *hdr;
286
287         if (!skb)
288                 return -ENOBUFS;
289
290         /* Woe be to the platform trying to support PFKEY yet
291          * having normal errnos outside the 1-255 range, inclusive.
292          */
293         err = -err;
294         if (err == ERESTARTSYS ||
295             err == ERESTARTNOHAND ||
296             err == ERESTARTNOINTR)
297                 err = EINTR;
298         if (err >= 512)
299                 err = EINVAL;
300         BUG_ON(err <= 0 || err >= 256);
301
302         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
303         pfkey_hdr_dup(hdr, orig);
304         hdr->sadb_msg_errno = (uint8_t) err;
305         hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
306                              sizeof(uint64_t));
307
308         pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
309
310         return 0;
311 }
312
313 static u8 sadb_ext_min_len[] = {
314         [SADB_EXT_RESERVED]             = (u8) 0,
315         [SADB_EXT_SA]                   = (u8) sizeof(struct sadb_sa),
316         [SADB_EXT_LIFETIME_CURRENT]     = (u8) sizeof(struct sadb_lifetime),
317         [SADB_EXT_LIFETIME_HARD]        = (u8) sizeof(struct sadb_lifetime),
318         [SADB_EXT_LIFETIME_SOFT]        = (u8) sizeof(struct sadb_lifetime),
319         [SADB_EXT_ADDRESS_SRC]          = (u8) sizeof(struct sadb_address),
320         [SADB_EXT_ADDRESS_DST]          = (u8) sizeof(struct sadb_address),
321         [SADB_EXT_ADDRESS_PROXY]        = (u8) sizeof(struct sadb_address),
322         [SADB_EXT_KEY_AUTH]             = (u8) sizeof(struct sadb_key),
323         [SADB_EXT_KEY_ENCRYPT]          = (u8) sizeof(struct sadb_key),
324         [SADB_EXT_IDENTITY_SRC]         = (u8) sizeof(struct sadb_ident),
325         [SADB_EXT_IDENTITY_DST]         = (u8) sizeof(struct sadb_ident),
326         [SADB_EXT_SENSITIVITY]          = (u8) sizeof(struct sadb_sens),
327         [SADB_EXT_PROPOSAL]             = (u8) sizeof(struct sadb_prop),
328         [SADB_EXT_SUPPORTED_AUTH]       = (u8) sizeof(struct sadb_supported),
329         [SADB_EXT_SUPPORTED_ENCRYPT]    = (u8) sizeof(struct sadb_supported),
330         [SADB_EXT_SPIRANGE]             = (u8) sizeof(struct sadb_spirange),
331         [SADB_X_EXT_KMPRIVATE]          = (u8) sizeof(struct sadb_x_kmprivate),
332         [SADB_X_EXT_POLICY]             = (u8) sizeof(struct sadb_x_policy),
333         [SADB_X_EXT_SA2]                = (u8) sizeof(struct sadb_x_sa2),
334         [SADB_X_EXT_NAT_T_TYPE]         = (u8) sizeof(struct sadb_x_nat_t_type),
335         [SADB_X_EXT_NAT_T_SPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
336         [SADB_X_EXT_NAT_T_DPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
337         [SADB_X_EXT_NAT_T_OA]           = (u8) sizeof(struct sadb_address),
338         [SADB_X_EXT_SEC_CTX]            = (u8) sizeof(struct sadb_x_sec_ctx),
339 };
340
341 /* Verify sadb_address_{len,prefixlen} against sa_family.  */
342 static int verify_address_len(void *p)
343 {
344         struct sadb_address *sp = p;
345         struct sockaddr *addr = (struct sockaddr *)(sp + 1);
346         struct sockaddr_in *sin;
347 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
348         struct sockaddr_in6 *sin6;
349 #endif
350         int len;
351
352         switch (addr->sa_family) {
353         case AF_INET:
354                 len  = sizeof(*sp) + sizeof(*sin) + (sizeof(uint64_t) - 1);
355                 len /= 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  = sizeof(*sp) + sizeof(*sin6) + (sizeof(uint64_t) - 1);
363                 len /= sizeof(uint64_t);
364                 if (sp->sadb_address_len != len ||
365                     sp->sadb_address_prefixlen > 128)
366                         return -EINVAL;
367                 break;
368 #endif
369         default:
370                 /* It is user using kernel to keep track of security
371                  * associations for another protocol, such as
372                  * OSPF/RSVP/RIPV2/MIP.  It is user's job to verify
373                  * lengths.
374                  *
375                  * XXX Actually, association/policy database is not yet
376                  * XXX able to cope with arbitrary sockaddr families.
377                  * XXX When it can, remove this -EINVAL.  -DaveM
378                  */
379                 return -EINVAL;
380                 break;
381         };
382
383         return 0;
384 }
385
386 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
387 {
388         int len = 0;
389
390         len += sizeof(struct sadb_x_sec_ctx);
391         len += sec_ctx->sadb_x_ctx_len;
392         len += sizeof(uint64_t) - 1;
393         len /= sizeof(uint64_t);
394
395         return len;
396 }
397
398 static inline int verify_sec_ctx_len(void *p)
399 {
400         struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
401         int len;
402
403         if (sec_ctx->sadb_x_ctx_len > PAGE_SIZE)
404                 return -EINVAL;
405
406         len = pfkey_sec_ctx_len(sec_ctx);
407
408         if (sec_ctx->sadb_x_sec_len != len)
409                 return -EINVAL;
410
411         return 0;
412 }
413
414 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
415 {
416         struct xfrm_user_sec_ctx *uctx = NULL;
417         int ctx_size = sec_ctx->sadb_x_ctx_len;
418
419         uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
420
421         if (!uctx)
422                 return NULL;
423
424         uctx->len = pfkey_sec_ctx_len(sec_ctx);
425         uctx->exttype = sec_ctx->sadb_x_sec_exttype;
426         uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
427         uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
428         uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
429         memcpy(uctx + 1, sec_ctx + 1,
430                uctx->ctx_len);
431
432         return uctx;
433 }
434
435 static int present_and_same_family(struct sadb_address *src,
436                                    struct sadb_address *dst)
437 {
438         struct sockaddr *s_addr, *d_addr;
439
440         if (!src || !dst)
441                 return 0;
442
443         s_addr = (struct sockaddr *)(src + 1);
444         d_addr = (struct sockaddr *)(dst + 1);
445         if (s_addr->sa_family != d_addr->sa_family)
446                 return 0;
447         if (s_addr->sa_family != AF_INET
448 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
449             && s_addr->sa_family != AF_INET6
450 #endif
451                 )
452                 return 0;
453
454         return 1;
455 }
456
457 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
458 {
459         char *p = (char *) hdr;
460         int len = skb->len;
461
462         len -= sizeof(*hdr);
463         p += sizeof(*hdr);
464         while (len > 0) {
465                 struct sadb_ext *ehdr = (struct sadb_ext *) p;
466                 uint16_t ext_type;
467                 int ext_len;
468
469                 ext_len  = ehdr->sadb_ext_len;
470                 ext_len *= sizeof(uint64_t);
471                 ext_type = ehdr->sadb_ext_type;
472                 if (ext_len < sizeof(uint64_t) ||
473                     ext_len > len ||
474                     ext_type == SADB_EXT_RESERVED)
475                         return -EINVAL;
476
477                 if (ext_type <= SADB_EXT_MAX) {
478                         int min = (int) sadb_ext_min_len[ext_type];
479                         if (ext_len < min)
480                                 return -EINVAL;
481                         if (ext_hdrs[ext_type-1] != NULL)
482                                 return -EINVAL;
483                         if (ext_type == SADB_EXT_ADDRESS_SRC ||
484                             ext_type == SADB_EXT_ADDRESS_DST ||
485                             ext_type == SADB_EXT_ADDRESS_PROXY ||
486                             ext_type == SADB_X_EXT_NAT_T_OA) {
487                                 if (verify_address_len(p))
488                                         return -EINVAL;
489                         }                               
490                         if (ext_type == SADB_X_EXT_SEC_CTX) {
491                                 if (verify_sec_ctx_len(p))
492                                         return -EINVAL;
493                         }
494                         ext_hdrs[ext_type-1] = p;
495                 }
496                 p   += ext_len;
497                 len -= ext_len;
498         }
499
500         return 0;
501 }
502
503 static uint16_t
504 pfkey_satype2proto(uint8_t satype)
505 {
506         switch (satype) {
507         case SADB_SATYPE_UNSPEC:
508                 return IPSEC_PROTO_ANY;
509         case SADB_SATYPE_AH:
510                 return IPPROTO_AH;
511         case SADB_SATYPE_ESP:
512                 return IPPROTO_ESP;
513         case SADB_X_SATYPE_IPCOMP:
514                 return IPPROTO_COMP;
515                 break;
516         default:
517                 return 0;
518         }
519         /* NOTREACHED */
520 }
521
522 static uint8_t
523 pfkey_proto2satype(uint16_t proto)
524 {
525         switch (proto) {
526         case IPPROTO_AH:
527                 return SADB_SATYPE_AH;
528         case IPPROTO_ESP:
529                 return SADB_SATYPE_ESP;
530         case IPPROTO_COMP:
531                 return SADB_X_SATYPE_IPCOMP;
532                 break;
533         default:
534                 return 0;
535         }
536         /* NOTREACHED */
537 }
538
539 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
540  * say specifically 'just raw sockets' as we encode them as 255.
541  */
542
543 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
544 {
545         return (proto == IPSEC_PROTO_ANY ? 0 : proto);
546 }
547
548 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
549 {
550         return (proto ? proto : IPSEC_PROTO_ANY);
551 }
552
553 static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
554                                      xfrm_address_t *xaddr)
555 {
556         switch (((struct sockaddr*)(addr + 1))->sa_family) {
557         case AF_INET:
558                 xaddr->a4 = 
559                         ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
560                 return AF_INET;
561 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
562         case AF_INET6:
563                 memcpy(xaddr->a6, 
564                        &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
565                        sizeof(struct in6_addr));
566                 return AF_INET6;
567 #endif
568         default:
569                 return 0;
570         }
571         /* NOTREACHED */
572 }
573
574 static struct  xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
575 {
576         struct sadb_sa *sa;
577         struct sadb_address *addr;
578         uint16_t proto;
579         unsigned short family;
580         xfrm_address_t *xaddr;
581
582         sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
583         if (sa == NULL)
584                 return NULL;
585
586         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
587         if (proto == 0)
588                 return NULL;
589
590         /* sadb_address_len should be checked by caller */
591         addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
592         if (addr == NULL)
593                 return NULL;
594
595         family = ((struct sockaddr *)(addr + 1))->sa_family;
596         switch (family) {
597         case AF_INET:
598                 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
599                 break;
600 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
601         case AF_INET6:
602                 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
603                 break;
604 #endif
605         default:
606                 xaddr = NULL;
607         }
608
609         if (!xaddr)
610                 return NULL;
611
612         return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
613 }
614
615 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
616 static int
617 pfkey_sockaddr_size(sa_family_t family)
618 {
619         switch (family) {
620         case AF_INET:
621                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
622 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
623         case AF_INET6:
624                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
625 #endif
626         default:
627                 return 0;
628         }
629         /* NOTREACHED */
630 }
631
632 static struct sk_buff * pfkey_xfrm_state2msg(struct xfrm_state *x, int add_keys, int hsc)
633 {
634         struct sk_buff *skb;
635         struct sadb_msg *hdr;
636         struct sadb_sa *sa;
637         struct sadb_lifetime *lifetime;
638         struct sadb_address *addr;
639         struct sadb_key *key;
640         struct sadb_x_sa2 *sa2;
641         struct sockaddr_in *sin;
642         struct sadb_x_sec_ctx *sec_ctx;
643         struct xfrm_sec_ctx *xfrm_ctx;
644         int ctx_size = 0;
645 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
646         struct sockaddr_in6 *sin6;
647 #endif
648         int size;
649         int auth_key_size = 0;
650         int encrypt_key_size = 0;
651         int sockaddr_size;
652         struct xfrm_encap_tmpl *natt = NULL;
653
654         /* address family check */
655         sockaddr_size = pfkey_sockaddr_size(x->props.family);
656         if (!sockaddr_size)
657                 return ERR_PTR(-EINVAL);
658
659         /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
660            key(AE), (identity(SD),) (sensitivity)> */
661         size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) + 
662                 sizeof(struct sadb_lifetime) +
663                 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
664                 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
665                         sizeof(struct sadb_address)*2 + 
666                                 sockaddr_size*2 +
667                                         sizeof(struct sadb_x_sa2);
668
669         if ((xfrm_ctx = x->security)) {
670                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
671                 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
672         }
673
674         /* identity & sensitivity */
675
676         if ((x->props.family == AF_INET &&
677              x->sel.saddr.a4 != x->props.saddr.a4)
678 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
679             || (x->props.family == AF_INET6 &&
680                 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
681 #endif
682                 )
683                 size += sizeof(struct sadb_address) + sockaddr_size;
684
685         if (add_keys) {
686                 if (x->aalg && x->aalg->alg_key_len) {
687                         auth_key_size = 
688                                 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8); 
689                         size += sizeof(struct sadb_key) + auth_key_size;
690                 }
691                 if (x->ealg && x->ealg->alg_key_len) {
692                         encrypt_key_size = 
693                                 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8); 
694                         size += sizeof(struct sadb_key) + encrypt_key_size;
695                 }
696         }
697         if (x->encap)
698                 natt = x->encap;
699
700         if (natt && natt->encap_type) {
701                 size += sizeof(struct sadb_x_nat_t_type);
702                 size += sizeof(struct sadb_x_nat_t_port);
703                 size += sizeof(struct sadb_x_nat_t_port);
704         }
705
706         skb =  alloc_skb(size + 16, GFP_ATOMIC);
707         if (skb == NULL)
708                 return ERR_PTR(-ENOBUFS);
709
710         /* call should fill header later */
711         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
712         memset(hdr, 0, size);   /* XXX do we need this ? */
713         hdr->sadb_msg_len = size / sizeof(uint64_t);
714
715         /* sa */
716         sa = (struct sadb_sa *)  skb_put(skb, sizeof(struct sadb_sa));
717         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
718         sa->sadb_sa_exttype = SADB_EXT_SA;
719         sa->sadb_sa_spi = x->id.spi;
720         sa->sadb_sa_replay = x->props.replay_window;
721         switch (x->km.state) {
722         case XFRM_STATE_VALID:
723                 sa->sadb_sa_state = x->km.dying ?
724                         SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
725                 break;
726         case XFRM_STATE_ACQ:
727                 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
728                 break;
729         default:
730                 sa->sadb_sa_state = SADB_SASTATE_DEAD;
731                 break;
732         }
733         sa->sadb_sa_auth = 0;
734         if (x->aalg) {
735                 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
736                 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
737         }
738         sa->sadb_sa_encrypt = 0;
739         BUG_ON(x->ealg && x->calg);
740         if (x->ealg) {
741                 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
742                 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
743         }
744         /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
745         if (x->calg) {
746                 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
747                 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
748         }
749
750         sa->sadb_sa_flags = 0;
751         if (x->props.flags & XFRM_STATE_NOECN)
752                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
753         if (x->props.flags & XFRM_STATE_DECAP_DSCP)
754                 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
755         if (x->props.flags & XFRM_STATE_NOPMTUDISC)
756                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
757
758         /* hard time */
759         if (hsc & 2) {
760                 lifetime = (struct sadb_lifetime *)  skb_put(skb, 
761                                                              sizeof(struct sadb_lifetime));
762                 lifetime->sadb_lifetime_len =
763                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
764                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
765                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.hard_packet_limit);
766                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
767                 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
768                 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
769         }
770         /* soft time */
771         if (hsc & 1) {
772                 lifetime = (struct sadb_lifetime *)  skb_put(skb, 
773                                                              sizeof(struct sadb_lifetime));
774                 lifetime->sadb_lifetime_len =
775                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
776                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
777                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.soft_packet_limit);
778                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
779                 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
780                 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
781         }
782         /* current time */
783         lifetime = (struct sadb_lifetime *)  skb_put(skb,
784                                                      sizeof(struct sadb_lifetime));
785         lifetime->sadb_lifetime_len =
786                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
787         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
788         lifetime->sadb_lifetime_allocations = x->curlft.packets;
789         lifetime->sadb_lifetime_bytes = x->curlft.bytes;
790         lifetime->sadb_lifetime_addtime = x->curlft.add_time;
791         lifetime->sadb_lifetime_usetime = x->curlft.use_time;
792         /* src address */
793         addr = (struct sadb_address*) skb_put(skb, 
794                                               sizeof(struct sadb_address)+sockaddr_size);
795         addr->sadb_address_len = 
796                 (sizeof(struct sadb_address)+sockaddr_size)/
797                         sizeof(uint64_t);
798         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
799         /* "if the ports are non-zero, then the sadb_address_proto field, 
800            normally zero, MUST be filled in with the transport 
801            protocol's number." - RFC2367 */
802         addr->sadb_address_proto = 0; 
803         addr->sadb_address_reserved = 0;
804         if (x->props.family == AF_INET) {
805                 addr->sadb_address_prefixlen = 32;
806
807                 sin = (struct sockaddr_in *) (addr + 1);
808                 sin->sin_family = AF_INET;
809                 sin->sin_addr.s_addr = x->props.saddr.a4;
810                 sin->sin_port = 0;
811                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
812         }
813 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
814         else if (x->props.family == AF_INET6) {
815                 addr->sadb_address_prefixlen = 128;
816
817                 sin6 = (struct sockaddr_in6 *) (addr + 1);
818                 sin6->sin6_family = AF_INET6;
819                 sin6->sin6_port = 0;
820                 sin6->sin6_flowinfo = 0;
821                 memcpy(&sin6->sin6_addr, x->props.saddr.a6,
822                        sizeof(struct in6_addr));
823                 sin6->sin6_scope_id = 0;
824         }
825 #endif
826         else
827                 BUG();
828
829         /* dst address */
830         addr = (struct sadb_address*) skb_put(skb, 
831                                               sizeof(struct sadb_address)+sockaddr_size);
832         addr->sadb_address_len = 
833                 (sizeof(struct sadb_address)+sockaddr_size)/
834                         sizeof(uint64_t);
835         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
836         addr->sadb_address_proto = 0; 
837         addr->sadb_address_prefixlen = 32; /* XXX */ 
838         addr->sadb_address_reserved = 0;
839         if (x->props.family == AF_INET) {
840                 sin = (struct sockaddr_in *) (addr + 1);
841                 sin->sin_family = AF_INET;
842                 sin->sin_addr.s_addr = x->id.daddr.a4;
843                 sin->sin_port = 0;
844                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
845
846                 if (x->sel.saddr.a4 != x->props.saddr.a4) {
847                         addr = (struct sadb_address*) skb_put(skb, 
848                                 sizeof(struct sadb_address)+sockaddr_size);
849                         addr->sadb_address_len = 
850                                 (sizeof(struct sadb_address)+sockaddr_size)/
851                                 sizeof(uint64_t);
852                         addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
853                         addr->sadb_address_proto =
854                                 pfkey_proto_from_xfrm(x->sel.proto);
855                         addr->sadb_address_prefixlen = x->sel.prefixlen_s;
856                         addr->sadb_address_reserved = 0;
857
858                         sin = (struct sockaddr_in *) (addr + 1);
859                         sin->sin_family = AF_INET;
860                         sin->sin_addr.s_addr = x->sel.saddr.a4;
861                         sin->sin_port = x->sel.sport;
862                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
863                 }
864         }
865 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
866         else if (x->props.family == AF_INET6) {
867                 addr->sadb_address_prefixlen = 128;
868
869                 sin6 = (struct sockaddr_in6 *) (addr + 1);
870                 sin6->sin6_family = AF_INET6;
871                 sin6->sin6_port = 0;
872                 sin6->sin6_flowinfo = 0;
873                 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
874                 sin6->sin6_scope_id = 0;
875
876                 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
877                             sizeof(struct in6_addr))) {
878                         addr = (struct sadb_address *) skb_put(skb, 
879                                 sizeof(struct sadb_address)+sockaddr_size);
880                         addr->sadb_address_len = 
881                                 (sizeof(struct sadb_address)+sockaddr_size)/
882                                 sizeof(uint64_t);
883                         addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
884                         addr->sadb_address_proto =
885                                 pfkey_proto_from_xfrm(x->sel.proto);
886                         addr->sadb_address_prefixlen = x->sel.prefixlen_s;
887                         addr->sadb_address_reserved = 0;
888
889                         sin6 = (struct sockaddr_in6 *) (addr + 1);
890                         sin6->sin6_family = AF_INET6;
891                         sin6->sin6_port = x->sel.sport;
892                         sin6->sin6_flowinfo = 0;
893                         memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
894                                sizeof(struct in6_addr));
895                         sin6->sin6_scope_id = 0;
896                 }
897         }
898 #endif
899         else
900                 BUG();
901
902         /* auth key */
903         if (add_keys && auth_key_size) {
904                 key = (struct sadb_key *) skb_put(skb, 
905                                                   sizeof(struct sadb_key)+auth_key_size);
906                 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
907                         sizeof(uint64_t);
908                 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
909                 key->sadb_key_bits = x->aalg->alg_key_len;
910                 key->sadb_key_reserved = 0;
911                 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
912         }
913         /* encrypt key */
914         if (add_keys && encrypt_key_size) {
915                 key = (struct sadb_key *) skb_put(skb, 
916                                                   sizeof(struct sadb_key)+encrypt_key_size);
917                 key->sadb_key_len = (sizeof(struct sadb_key) + 
918                                      encrypt_key_size) / sizeof(uint64_t);
919                 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
920                 key->sadb_key_bits = x->ealg->alg_key_len;
921                 key->sadb_key_reserved = 0;
922                 memcpy(key + 1, x->ealg->alg_key, 
923                        (x->ealg->alg_key_len+7)/8);
924         }
925
926         /* sa */
927         sa2 = (struct sadb_x_sa2 *)  skb_put(skb, sizeof(struct sadb_x_sa2));
928         sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
929         sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
930         sa2->sadb_x_sa2_mode = x->props.mode + 1;
931         sa2->sadb_x_sa2_reserved1 = 0;
932         sa2->sadb_x_sa2_reserved2 = 0;
933         sa2->sadb_x_sa2_sequence = 0;
934         sa2->sadb_x_sa2_reqid = x->props.reqid;
935
936         if (natt && natt->encap_type) {
937                 struct sadb_x_nat_t_type *n_type;
938                 struct sadb_x_nat_t_port *n_port;
939
940                 /* type */
941                 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
942                 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
943                 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
944                 n_type->sadb_x_nat_t_type_type = natt->encap_type;
945                 n_type->sadb_x_nat_t_type_reserved[0] = 0;
946                 n_type->sadb_x_nat_t_type_reserved[1] = 0;
947                 n_type->sadb_x_nat_t_type_reserved[2] = 0;
948
949                 /* source port */
950                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
951                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
952                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
953                 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
954                 n_port->sadb_x_nat_t_port_reserved = 0;
955
956                 /* dest port */
957                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
958                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
959                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
960                 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
961                 n_port->sadb_x_nat_t_port_reserved = 0;
962         }
963
964         /* security context */
965         if (xfrm_ctx) {
966                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
967                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
968                 sec_ctx->sadb_x_sec_len =
969                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
970                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
971                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
972                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
973                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
974                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
975                        xfrm_ctx->ctx_len);
976         }
977
978         return skb;
979 }
980
981 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr, 
982                                                 void **ext_hdrs)
983 {
984         struct xfrm_state *x; 
985         struct sadb_lifetime *lifetime;
986         struct sadb_sa *sa;
987         struct sadb_key *key;
988         struct sadb_x_sec_ctx *sec_ctx;
989         uint16_t proto;
990         int err;
991         
992
993         sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
994         if (!sa ||
995             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
996                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
997                 return ERR_PTR(-EINVAL);
998         if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
999             !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1000                 return ERR_PTR(-EINVAL);
1001         if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1002             !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1003                 return ERR_PTR(-EINVAL);
1004         if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1005             !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1006                 return ERR_PTR(-EINVAL);
1007
1008         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1009         if (proto == 0)
1010                 return ERR_PTR(-EINVAL);
1011
1012         /* default error is no buffer space */
1013         err = -ENOBUFS;
1014
1015         /* RFC2367:
1016
1017    Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1018    SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1019    sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1020    Therefore, the sadb_sa_state field of all submitted SAs MUST be
1021    SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1022    not true.
1023
1024            However, KAME setkey always uses SADB_SASTATE_LARVAL.
1025            Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1026          */
1027         if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1028             (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1029              sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1030             sa->sadb_sa_encrypt > SADB_EALG_MAX)
1031                 return ERR_PTR(-EINVAL);
1032         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1033         if (key != NULL &&
1034             sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1035             ((key->sadb_key_bits+7) / 8 == 0 ||
1036              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1037                 return ERR_PTR(-EINVAL);
1038         key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1039         if (key != NULL &&
1040             sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1041             ((key->sadb_key_bits+7) / 8 == 0 ||
1042              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1043                 return ERR_PTR(-EINVAL);
1044
1045         x = xfrm_state_alloc();
1046         if (x == NULL)
1047                 return ERR_PTR(-ENOBUFS);
1048
1049         x->id.proto = proto;
1050         x->id.spi = sa->sadb_sa_spi;
1051         x->props.replay_window = sa->sadb_sa_replay;
1052         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1053                 x->props.flags |= XFRM_STATE_NOECN;
1054         if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1055                 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1056         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1057                 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1058
1059         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1060         if (lifetime != NULL) {
1061                 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1062                 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1063                 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1064                 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1065         }
1066         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1067         if (lifetime != NULL) {
1068                 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1069                 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1070                 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1071                 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1072         }
1073
1074         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1075         if (sec_ctx != NULL) {
1076                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1077
1078                 if (!uctx)
1079                         goto out;
1080
1081                 err = security_xfrm_state_alloc(x, uctx);
1082                 kfree(uctx);
1083
1084                 if (err)
1085                         goto out;
1086         }
1087
1088         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1089         if (sa->sadb_sa_auth) {
1090                 int keysize = 0;
1091                 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1092                 if (!a) {
1093                         err = -ENOSYS;
1094                         goto out;
1095                 }
1096                 if (key)
1097                         keysize = (key->sadb_key_bits + 7) / 8;
1098                 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1099                 if (!x->aalg)
1100                         goto out;
1101                 strcpy(x->aalg->alg_name, a->name);
1102                 x->aalg->alg_key_len = 0;
1103                 if (key) {
1104                         x->aalg->alg_key_len = key->sadb_key_bits;
1105                         memcpy(x->aalg->alg_key, key+1, keysize);
1106                 }
1107                 x->props.aalgo = sa->sadb_sa_auth;
1108                 /* x->algo.flags = sa->sadb_sa_flags; */
1109         }
1110         if (sa->sadb_sa_encrypt) {
1111                 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1112                         struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1113                         if (!a) {
1114                                 err = -ENOSYS;
1115                                 goto out;
1116                         }
1117                         x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1118                         if (!x->calg)
1119                                 goto out;
1120                         strcpy(x->calg->alg_name, a->name);
1121                         x->props.calgo = sa->sadb_sa_encrypt;
1122                 } else {
1123                         int keysize = 0;
1124                         struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1125                         if (!a) {
1126                                 err = -ENOSYS;
1127                                 goto out;
1128                         }
1129                         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1130                         if (key)
1131                                 keysize = (key->sadb_key_bits + 7) / 8;
1132                         x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1133                         if (!x->ealg)
1134                                 goto out;
1135                         strcpy(x->ealg->alg_name, a->name);
1136                         x->ealg->alg_key_len = 0;
1137                         if (key) {
1138                                 x->ealg->alg_key_len = key->sadb_key_bits;
1139                                 memcpy(x->ealg->alg_key, key+1, keysize);
1140                         }
1141                         x->props.ealgo = sa->sadb_sa_encrypt;
1142                 }
1143         }
1144         /* x->algo.flags = sa->sadb_sa_flags; */
1145
1146         x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 
1147                                                     &x->props.saddr);
1148         if (!x->props.family) {
1149                 err = -EAFNOSUPPORT;
1150                 goto out;
1151         }
1152         pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1], 
1153                                   &x->id.daddr);
1154
1155         if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1156                 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1157                 x->props.mode = sa2->sadb_x_sa2_mode;
1158                 if (x->props.mode)
1159                         x->props.mode--;
1160                 x->props.reqid = sa2->sadb_x_sa2_reqid;
1161         }
1162
1163         if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1164                 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1165
1166                 /* Nobody uses this, but we try. */
1167                 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1168                 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1169         }
1170
1171         if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1172                 struct sadb_x_nat_t_type* n_type;
1173                 struct xfrm_encap_tmpl *natt;
1174
1175                 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1176                 if (!x->encap)
1177                         goto out;
1178
1179                 natt = x->encap;
1180                 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1181                 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1182
1183                 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1184                         struct sadb_x_nat_t_port* n_port =
1185                                 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1186                         natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1187                 }
1188                 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1189                         struct sadb_x_nat_t_port* n_port =
1190                                 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1191                         natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1192                 }
1193         }
1194
1195         err = xfrm_init_state(x);
1196         if (err)
1197                 goto out;
1198
1199         x->km.seq = hdr->sadb_msg_seq;
1200         return x;
1201
1202 out:
1203         x->km.state = XFRM_STATE_DEAD;
1204         xfrm_state_put(x);
1205         return ERR_PTR(err);
1206 }
1207
1208 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1209 {
1210         return -EOPNOTSUPP;
1211 }
1212
1213 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1214 {
1215         struct sk_buff *resp_skb;
1216         struct sadb_x_sa2 *sa2;
1217         struct sadb_address *saddr, *daddr;
1218         struct sadb_msg *out_hdr;
1219         struct xfrm_state *x = NULL;
1220         u8 mode;
1221         u32 reqid;
1222         u8 proto;
1223         unsigned short family;
1224         xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1225
1226         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1227                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1228                 return -EINVAL;
1229
1230         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1231         if (proto == 0)
1232                 return -EINVAL;
1233
1234         if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1235                 mode = sa2->sadb_x_sa2_mode - 1;
1236                 reqid = sa2->sadb_x_sa2_reqid;
1237         } else {
1238                 mode = 0;
1239                 reqid = 0;
1240         }
1241
1242         saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1243         daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1244
1245         family = ((struct sockaddr *)(saddr + 1))->sa_family;
1246         switch (family) {
1247         case AF_INET:
1248                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1249                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1250                 break;
1251 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1252         case AF_INET6:
1253                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1254                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1255                 break;
1256 #endif
1257         }
1258
1259         if (hdr->sadb_msg_seq) {
1260                 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1261                 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1262                         xfrm_state_put(x);
1263                         x = NULL;
1264                 }
1265         }
1266
1267         if (!x)
1268                 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1269
1270         if (x == NULL)
1271                 return -ENOENT;
1272
1273         resp_skb = ERR_PTR(-ENOENT);
1274
1275         spin_lock_bh(&x->lock);
1276         if (x->km.state != XFRM_STATE_DEAD) {
1277                 struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1278                 u32 min_spi, max_spi;
1279
1280                 if (range != NULL) {
1281                         min_spi = range->sadb_spirange_min;
1282                         max_spi = range->sadb_spirange_max;
1283                 } else {
1284                         min_spi = 0x100;
1285                         max_spi = 0x0fffffff;
1286                 }
1287                 xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi));
1288                 if (x->id.spi)
1289                         resp_skb = pfkey_xfrm_state2msg(x, 0, 3);
1290         }
1291         spin_unlock_bh(&x->lock);
1292
1293         if (IS_ERR(resp_skb)) {
1294                 xfrm_state_put(x);
1295                 return  PTR_ERR(resp_skb);
1296         }
1297
1298         out_hdr = (struct sadb_msg *) resp_skb->data;
1299         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1300         out_hdr->sadb_msg_type = SADB_GETSPI;
1301         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1302         out_hdr->sadb_msg_errno = 0;
1303         out_hdr->sadb_msg_reserved = 0;
1304         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1305         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1306
1307         xfrm_state_put(x);
1308
1309         pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1310
1311         return 0;
1312 }
1313
1314 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1315 {
1316         struct xfrm_state *x;
1317
1318         if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1319                 return -EOPNOTSUPP;
1320
1321         if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1322                 return 0;
1323
1324         x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1325         if (x == NULL)
1326                 return 0;
1327
1328         spin_lock_bh(&x->lock);
1329         if (x->km.state == XFRM_STATE_ACQ) {
1330                 x->km.state = XFRM_STATE_ERROR;
1331                 wake_up(&km_waitq);
1332         }
1333         spin_unlock_bh(&x->lock);
1334         xfrm_state_put(x);
1335         return 0;
1336 }
1337
1338 static inline int event2poltype(int event)
1339 {
1340         switch (event) {
1341         case XFRM_MSG_DELPOLICY:
1342                 return SADB_X_SPDDELETE;
1343         case XFRM_MSG_NEWPOLICY:
1344                 return SADB_X_SPDADD;
1345         case XFRM_MSG_UPDPOLICY:
1346                 return SADB_X_SPDUPDATE;
1347         case XFRM_MSG_POLEXPIRE:
1348         //      return SADB_X_SPDEXPIRE;
1349         default:
1350                 printk("pfkey: Unknown policy event %d\n", event);
1351                 break;
1352         }
1353
1354         return 0;
1355 }
1356
1357 static inline int event2keytype(int event)
1358 {
1359         switch (event) {
1360         case XFRM_MSG_DELSA:
1361                 return SADB_DELETE;
1362         case XFRM_MSG_NEWSA:
1363                 return SADB_ADD;
1364         case XFRM_MSG_UPDSA:
1365                 return SADB_UPDATE;
1366         case XFRM_MSG_EXPIRE:
1367                 return SADB_EXPIRE;
1368         default:
1369                 printk("pfkey: Unknown SA event %d\n", event);
1370                 break;
1371         }
1372
1373         return 0;
1374 }
1375
1376 /* ADD/UPD/DEL */
1377 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1378 {
1379         struct sk_buff *skb;
1380         struct sadb_msg *hdr;
1381         int hsc = 3;
1382
1383         if (c->event == XFRM_MSG_DELSA)
1384                 hsc = 0;
1385
1386         skb = pfkey_xfrm_state2msg(x, 0, hsc);
1387
1388         if (IS_ERR(skb))
1389                 return PTR_ERR(skb);
1390
1391         hdr = (struct sadb_msg *) skb->data;
1392         hdr->sadb_msg_version = PF_KEY_V2;
1393         hdr->sadb_msg_type = event2keytype(c->event);
1394         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1395         hdr->sadb_msg_errno = 0;
1396         hdr->sadb_msg_reserved = 0;
1397         hdr->sadb_msg_seq = c->seq;
1398         hdr->sadb_msg_pid = c->pid;
1399
1400         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1401
1402         return 0;
1403 }
1404
1405 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1406 {
1407         struct xfrm_state *x;
1408         int err;
1409         struct km_event c;
1410
1411         xfrm_probe_algs();
1412         
1413         x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1414         if (IS_ERR(x))
1415                 return PTR_ERR(x);
1416
1417         xfrm_state_hold(x);
1418         if (hdr->sadb_msg_type == SADB_ADD)
1419                 err = xfrm_state_add(x);
1420         else
1421                 err = xfrm_state_update(x);
1422
1423         if (err < 0) {
1424                 x->km.state = XFRM_STATE_DEAD;
1425                 __xfrm_state_put(x);
1426                 goto out;
1427         }
1428
1429         if (hdr->sadb_msg_type == SADB_ADD)
1430                 c.event = XFRM_MSG_NEWSA;
1431         else
1432                 c.event = XFRM_MSG_UPDSA;
1433         c.seq = hdr->sadb_msg_seq;
1434         c.pid = hdr->sadb_msg_pid;
1435         km_state_notify(x, &c);
1436 out:
1437         xfrm_state_put(x);
1438         return err;
1439 }
1440
1441 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1442 {
1443         struct xfrm_state *x;
1444         struct km_event c;
1445         int err;
1446
1447         if (!ext_hdrs[SADB_EXT_SA-1] ||
1448             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1449                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1450                 return -EINVAL;
1451
1452         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1453         if (x == NULL)
1454                 return -ESRCH;
1455
1456         if ((err = security_xfrm_state_delete(x)))
1457                 goto out;
1458
1459         if (xfrm_state_kern(x)) {
1460                 err = -EPERM;
1461                 goto out;
1462         }
1463         
1464         err = xfrm_state_delete(x);
1465         if (err < 0)
1466                 goto out;
1467
1468         c.seq = hdr->sadb_msg_seq;
1469         c.pid = hdr->sadb_msg_pid;
1470         c.event = XFRM_MSG_DELSA;
1471         km_state_notify(x, &c);
1472 out:
1473         xfrm_state_put(x);
1474
1475         return err;
1476 }
1477
1478 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1479 {
1480         __u8 proto;
1481         struct sk_buff *out_skb;
1482         struct sadb_msg *out_hdr;
1483         struct xfrm_state *x;
1484
1485         if (!ext_hdrs[SADB_EXT_SA-1] ||
1486             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1487                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1488                 return -EINVAL;
1489
1490         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1491         if (x == NULL)
1492                 return -ESRCH;
1493
1494         out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1495         proto = x->id.proto;
1496         xfrm_state_put(x);
1497         if (IS_ERR(out_skb))
1498                 return  PTR_ERR(out_skb);
1499
1500         out_hdr = (struct sadb_msg *) out_skb->data;
1501         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1502         out_hdr->sadb_msg_type = SADB_DUMP;
1503         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1504         out_hdr->sadb_msg_errno = 0;
1505         out_hdr->sadb_msg_reserved = 0;
1506         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1507         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1508         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1509
1510         return 0;
1511 }
1512
1513 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1514                                               gfp_t allocation)
1515 {
1516         struct sk_buff *skb;
1517         struct sadb_msg *hdr;
1518         int len, auth_len, enc_len, i;
1519
1520         auth_len = xfrm_count_auth_supported();
1521         if (auth_len) {
1522                 auth_len *= sizeof(struct sadb_alg);
1523                 auth_len += sizeof(struct sadb_supported);
1524         }
1525         
1526         enc_len = xfrm_count_enc_supported();
1527         if (enc_len) {
1528                 enc_len *= sizeof(struct sadb_alg);
1529                 enc_len += sizeof(struct sadb_supported);
1530         }
1531         
1532         len = enc_len + auth_len + sizeof(struct sadb_msg);
1533
1534         skb = alloc_skb(len + 16, allocation);
1535         if (!skb)
1536                 goto out_put_algs;
1537
1538         hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1539         pfkey_hdr_dup(hdr, orig);
1540         hdr->sadb_msg_errno = 0;
1541         hdr->sadb_msg_len = len / sizeof(uint64_t);
1542
1543         if (auth_len) {
1544                 struct sadb_supported *sp;
1545                 struct sadb_alg *ap;
1546
1547                 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1548                 ap = (struct sadb_alg *) (sp + 1);
1549
1550                 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1551                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1552
1553                 for (i = 0; ; i++) {
1554                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1555                         if (!aalg)
1556                                 break;
1557                         if (aalg->available)
1558                                 *ap++ = aalg->desc;
1559                 }
1560         }
1561
1562         if (enc_len) {
1563                 struct sadb_supported *sp;
1564                 struct sadb_alg *ap;
1565
1566                 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1567                 ap = (struct sadb_alg *) (sp + 1);
1568
1569                 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1570                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1571
1572                 for (i = 0; ; i++) {
1573                         struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1574                         if (!ealg)
1575                                 break;
1576                         if (ealg->available)
1577                                 *ap++ = ealg->desc;
1578                 }
1579         }
1580
1581 out_put_algs:
1582         return skb;
1583 }
1584
1585 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1586 {
1587         struct pfkey_sock *pfk = pfkey_sk(sk);
1588         struct sk_buff *supp_skb;
1589
1590         if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1591                 return -EINVAL;
1592
1593         if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1594                 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1595                         return -EEXIST;
1596                 pfk->registered |= (1<<hdr->sadb_msg_satype);
1597         }
1598
1599         xfrm_probe_algs();
1600         
1601         supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1602         if (!supp_skb) {
1603                 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1604                         pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1605
1606                 return -ENOBUFS;
1607         }
1608
1609         pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1610
1611         return 0;
1612 }
1613
1614 static int key_notify_sa_flush(struct km_event *c)
1615 {
1616         struct sk_buff *skb;
1617         struct sadb_msg *hdr;
1618
1619         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1620         if (!skb)
1621                 return -ENOBUFS;
1622         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1623         hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1624         hdr->sadb_msg_type = SADB_FLUSH;
1625         hdr->sadb_msg_seq = c->seq;
1626         hdr->sadb_msg_pid = c->pid;
1627         hdr->sadb_msg_version = PF_KEY_V2;
1628         hdr->sadb_msg_errno = (uint8_t) 0;
1629         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1630
1631         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1632
1633         return 0;
1634 }
1635
1636 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1637 {
1638         unsigned proto;
1639         struct km_event c;
1640
1641         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1642         if (proto == 0)
1643                 return -EINVAL;
1644
1645         xfrm_state_flush(proto);
1646         c.data.proto = proto;
1647         c.seq = hdr->sadb_msg_seq;
1648         c.pid = hdr->sadb_msg_pid;
1649         c.event = XFRM_MSG_FLUSHSA;
1650         km_state_notify(NULL, &c);
1651
1652         return 0;
1653 }
1654
1655 struct pfkey_dump_data
1656 {
1657         struct sk_buff *skb;
1658         struct sadb_msg *hdr;
1659         struct sock *sk;
1660 };
1661
1662 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1663 {
1664         struct pfkey_dump_data *data = ptr;
1665         struct sk_buff *out_skb;
1666         struct sadb_msg *out_hdr;
1667
1668         out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1669         if (IS_ERR(out_skb))
1670                 return PTR_ERR(out_skb);
1671
1672         out_hdr = (struct sadb_msg *) out_skb->data;
1673         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1674         out_hdr->sadb_msg_type = SADB_DUMP;
1675         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1676         out_hdr->sadb_msg_errno = 0;
1677         out_hdr->sadb_msg_reserved = 0;
1678         out_hdr->sadb_msg_seq = count;
1679         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1680         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1681         return 0;
1682 }
1683
1684 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1685 {
1686         u8 proto;
1687         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1688
1689         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1690         if (proto == 0)
1691                 return -EINVAL;
1692
1693         return xfrm_state_walk(proto, dump_sa, &data);
1694 }
1695
1696 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1697 {
1698         struct pfkey_sock *pfk = pfkey_sk(sk);
1699         int satype = hdr->sadb_msg_satype;
1700
1701         if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1702                 /* XXX we mangle packet... */
1703                 hdr->sadb_msg_errno = 0;
1704                 if (satype != 0 && satype != 1)
1705                         return -EINVAL;
1706                 pfk->promisc = satype;
1707         }
1708         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1709         return 0;
1710 }
1711
1712 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1713 {
1714         int i;
1715         u32 reqid = *(u32*)ptr;
1716
1717         for (i=0; i<xp->xfrm_nr; i++) {
1718                 if (xp->xfrm_vec[i].reqid == reqid)
1719                         return -EEXIST;
1720         }
1721         return 0;
1722 }
1723
1724 static u32 gen_reqid(void)
1725 {
1726         u32 start;
1727         static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1728
1729         start = reqid;
1730         do {
1731                 ++reqid;
1732                 if (reqid == 0)
1733                         reqid = IPSEC_MANUAL_REQID_MAX+1;
1734                 if (xfrm_policy_walk(check_reqid, (void*)&reqid) != -EEXIST)
1735                         return reqid;
1736         } while (reqid != start);
1737         return 0;
1738 }
1739
1740 static int
1741 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1742 {
1743         struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1744         struct sockaddr_in *sin;
1745 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1746         struct sockaddr_in6 *sin6;
1747 #endif
1748
1749         if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1750                 return -ELOOP;
1751
1752         if (rq->sadb_x_ipsecrequest_mode == 0)
1753                 return -EINVAL;
1754
1755         t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1756         t->mode = rq->sadb_x_ipsecrequest_mode-1;
1757         if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1758                 t->optional = 1;
1759         else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1760                 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1761                 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1762                         t->reqid = 0;
1763                 if (!t->reqid && !(t->reqid = gen_reqid()))
1764                         return -ENOBUFS;
1765         }
1766
1767         /* addresses present only in tunnel mode */
1768         if (t->mode) {
1769                 switch (xp->family) {
1770                 case AF_INET:
1771                         sin = (void*)(rq+1);
1772                         if (sin->sin_family != AF_INET)
1773                                 return -EINVAL;
1774                         t->saddr.a4 = sin->sin_addr.s_addr;
1775                         sin++;
1776                         if (sin->sin_family != AF_INET)
1777                                 return -EINVAL;
1778                         t->id.daddr.a4 = sin->sin_addr.s_addr;
1779                         break;
1780 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1781                 case AF_INET6:
1782                         sin6 = (void *)(rq+1);
1783                         if (sin6->sin6_family != AF_INET6)
1784                                 return -EINVAL;
1785                         memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1786                         sin6++;
1787                         if (sin6->sin6_family != AF_INET6)
1788                                 return -EINVAL;
1789                         memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1790                         break;
1791 #endif
1792                 default:
1793                         return -EINVAL;
1794                 }
1795         }
1796         /* No way to set this via kame pfkey */
1797         t->aalgos = t->ealgos = t->calgos = ~0;
1798         xp->xfrm_nr++;
1799         return 0;
1800 }
1801
1802 static int
1803 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1804 {
1805         int err;
1806         int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1807         struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1808
1809         while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1810                 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1811                         return err;
1812                 len -= rq->sadb_x_ipsecrequest_len;
1813                 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1814         }
1815         return 0;
1816 }
1817
1818 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1819 {
1820   struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1821
1822         if (xfrm_ctx) {
1823                 int len = sizeof(struct sadb_x_sec_ctx);
1824                 len += xfrm_ctx->ctx_len;
1825                 return PFKEY_ALIGN8(len);
1826         }
1827         return 0;
1828 }
1829
1830 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1831 {
1832         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1833         int socklen = (xp->family == AF_INET ?
1834                        sizeof(struct sockaddr_in) :
1835                        sizeof(struct sockaddr_in6));
1836
1837         return sizeof(struct sadb_msg) +
1838                 (sizeof(struct sadb_lifetime) * 3) +
1839                 (sizeof(struct sadb_address) * 2) + 
1840                 (sockaddr_size * 2) +
1841                 sizeof(struct sadb_x_policy) +
1842                 (xp->xfrm_nr * (sizeof(struct sadb_x_ipsecrequest) +
1843                                 (socklen * 2))) +
1844                 pfkey_xfrm_policy2sec_ctx_size(xp);
1845 }
1846
1847 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1848 {
1849         struct sk_buff *skb;
1850         int size;
1851
1852         size = pfkey_xfrm_policy2msg_size(xp);
1853
1854         skb =  alloc_skb(size + 16, GFP_ATOMIC);
1855         if (skb == NULL)
1856                 return ERR_PTR(-ENOBUFS);
1857
1858         return skb;
1859 }
1860
1861 static void pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1862 {
1863         struct sadb_msg *hdr;
1864         struct sadb_address *addr;
1865         struct sadb_lifetime *lifetime;
1866         struct sadb_x_policy *pol;
1867         struct sockaddr_in   *sin;
1868         struct sadb_x_sec_ctx *sec_ctx;
1869         struct xfrm_sec_ctx *xfrm_ctx;
1870 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1871         struct sockaddr_in6  *sin6;
1872 #endif
1873         int i;
1874         int size;
1875         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1876         int socklen = (xp->family == AF_INET ?
1877                        sizeof(struct sockaddr_in) :
1878                        sizeof(struct sockaddr_in6));
1879
1880         size = pfkey_xfrm_policy2msg_size(xp);
1881
1882         /* call should fill header later */
1883         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1884         memset(hdr, 0, size);   /* XXX do we need this ? */
1885
1886         /* src address */
1887         addr = (struct sadb_address*) skb_put(skb, 
1888                                               sizeof(struct sadb_address)+sockaddr_size);
1889         addr->sadb_address_len = 
1890                 (sizeof(struct sadb_address)+sockaddr_size)/
1891                         sizeof(uint64_t);
1892         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1893         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1894         addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1895         addr->sadb_address_reserved = 0;
1896         /* src address */
1897         if (xp->family == AF_INET) {
1898                 sin = (struct sockaddr_in *) (addr + 1);
1899                 sin->sin_family = AF_INET;
1900                 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1901                 sin->sin_port = xp->selector.sport;
1902                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1903         }
1904 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1905         else if (xp->family == AF_INET6) {
1906                 sin6 = (struct sockaddr_in6 *) (addr + 1);
1907                 sin6->sin6_family = AF_INET6;
1908                 sin6->sin6_port = xp->selector.sport;
1909                 sin6->sin6_flowinfo = 0;
1910                 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1911                        sizeof(struct in6_addr));
1912                 sin6->sin6_scope_id = 0;
1913         }
1914 #endif
1915         else
1916                 BUG();
1917
1918         /* dst address */
1919         addr = (struct sadb_address*) skb_put(skb, 
1920                                               sizeof(struct sadb_address)+sockaddr_size);
1921         addr->sadb_address_len =
1922                 (sizeof(struct sadb_address)+sockaddr_size)/
1923                         sizeof(uint64_t);
1924         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1925         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1926         addr->sadb_address_prefixlen = xp->selector.prefixlen_d; 
1927         addr->sadb_address_reserved = 0;
1928         if (xp->family == AF_INET) {
1929                 sin = (struct sockaddr_in *) (addr + 1);
1930                 sin->sin_family = AF_INET;
1931                 sin->sin_addr.s_addr = xp->selector.daddr.a4;
1932                 sin->sin_port = xp->selector.dport;
1933                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1934         }
1935 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1936         else if (xp->family == AF_INET6) {
1937                 sin6 = (struct sockaddr_in6 *) (addr + 1);
1938                 sin6->sin6_family = AF_INET6;
1939                 sin6->sin6_port = xp->selector.dport;
1940                 sin6->sin6_flowinfo = 0;
1941                 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
1942                        sizeof(struct in6_addr));
1943                 sin6->sin6_scope_id = 0;
1944         }
1945 #endif
1946         else
1947                 BUG();
1948
1949         /* hard time */
1950         lifetime = (struct sadb_lifetime *)  skb_put(skb, 
1951                                                      sizeof(struct sadb_lifetime));
1952         lifetime->sadb_lifetime_len =
1953                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
1954         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
1955         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.hard_packet_limit);
1956         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
1957         lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
1958         lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
1959         /* soft time */
1960         lifetime = (struct sadb_lifetime *)  skb_put(skb, 
1961                                                      sizeof(struct sadb_lifetime));
1962         lifetime->sadb_lifetime_len =
1963                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
1964         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
1965         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.soft_packet_limit);
1966         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
1967         lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
1968         lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
1969         /* current time */
1970         lifetime = (struct sadb_lifetime *)  skb_put(skb, 
1971                                                      sizeof(struct sadb_lifetime));
1972         lifetime->sadb_lifetime_len =
1973                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
1974         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
1975         lifetime->sadb_lifetime_allocations = xp->curlft.packets;
1976         lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
1977         lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
1978         lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
1979
1980         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
1981         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
1982         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
1983         pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
1984         if (xp->action == XFRM_POLICY_ALLOW) {
1985                 if (xp->xfrm_nr)
1986                         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
1987                 else
1988                         pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
1989         }
1990         pol->sadb_x_policy_dir = dir+1;
1991         pol->sadb_x_policy_id = xp->index;
1992         pol->sadb_x_policy_priority = xp->priority;
1993
1994         for (i=0; i<xp->xfrm_nr; i++) {
1995                 struct sadb_x_ipsecrequest *rq;
1996                 struct xfrm_tmpl *t = xp->xfrm_vec + i;
1997                 int req_size;
1998
1999                 req_size = sizeof(struct sadb_x_ipsecrequest);
2000                 if (t->mode)
2001                         req_size += 2*socklen;
2002                 else
2003                         size -= 2*socklen;
2004                 rq = (void*)skb_put(skb, req_size);
2005                 pol->sadb_x_policy_len += req_size/8;
2006                 memset(rq, 0, sizeof(*rq));
2007                 rq->sadb_x_ipsecrequest_len = req_size;
2008                 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2009                 rq->sadb_x_ipsecrequest_mode = t->mode+1;
2010                 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2011                 if (t->reqid)
2012                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2013                 if (t->optional)
2014                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2015                 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2016                 if (t->mode) {
2017                         switch (xp->family) {
2018                         case AF_INET:
2019                                 sin = (void*)(rq+1);
2020                                 sin->sin_family = AF_INET;
2021                                 sin->sin_addr.s_addr = t->saddr.a4;
2022                                 sin->sin_port = 0;
2023                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2024                                 sin++;
2025                                 sin->sin_family = AF_INET;
2026                                 sin->sin_addr.s_addr = t->id.daddr.a4;
2027                                 sin->sin_port = 0;
2028                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2029                                 break;
2030 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2031                         case AF_INET6:
2032                                 sin6 = (void*)(rq+1);
2033                                 sin6->sin6_family = AF_INET6;
2034                                 sin6->sin6_port = 0;
2035                                 sin6->sin6_flowinfo = 0;
2036                                 memcpy(&sin6->sin6_addr, t->saddr.a6,
2037                                        sizeof(struct in6_addr));
2038                                 sin6->sin6_scope_id = 0;
2039
2040                                 sin6++;
2041                                 sin6->sin6_family = AF_INET6;
2042                                 sin6->sin6_port = 0;
2043                                 sin6->sin6_flowinfo = 0;
2044                                 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2045                                        sizeof(struct in6_addr));
2046                                 sin6->sin6_scope_id = 0;
2047                                 break;
2048 #endif
2049                         default:
2050                                 break;
2051                         }
2052                 }
2053         }
2054
2055         /* security context */
2056         if ((xfrm_ctx = xp->security)) {
2057                 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2058
2059                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2060                 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2061                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2062                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2063                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2064                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2065                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2066                        xfrm_ctx->ctx_len);
2067         }
2068
2069         hdr->sadb_msg_len = size / sizeof(uint64_t);
2070         hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2071 }
2072
2073 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2074 {
2075         struct sk_buff *out_skb;
2076         struct sadb_msg *out_hdr;
2077         int err;
2078
2079         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2080         if (IS_ERR(out_skb)) {
2081                 err = PTR_ERR(out_skb);
2082                 goto out;
2083         }
2084         pfkey_xfrm_policy2msg(out_skb, xp, dir);
2085
2086         out_hdr = (struct sadb_msg *) out_skb->data;
2087         out_hdr->sadb_msg_version = PF_KEY_V2;
2088
2089         if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2090                 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2091         else
2092                 out_hdr->sadb_msg_type = event2poltype(c->event);
2093         out_hdr->sadb_msg_errno = 0;
2094         out_hdr->sadb_msg_seq = c->seq;
2095         out_hdr->sadb_msg_pid = c->pid;
2096         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2097 out:
2098         return 0;
2099
2100 }
2101
2102 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2103 {
2104         int err = 0;
2105         struct sadb_lifetime *lifetime;
2106         struct sadb_address *sa;
2107         struct sadb_x_policy *pol;
2108         struct xfrm_policy *xp;
2109         struct km_event c;
2110         struct sadb_x_sec_ctx *sec_ctx;
2111
2112         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2113                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2114             !ext_hdrs[SADB_X_EXT_POLICY-1])
2115                 return -EINVAL;
2116
2117         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2118         if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2119                 return -EINVAL;
2120         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2121                 return -EINVAL;
2122
2123         xp = xfrm_policy_alloc(GFP_KERNEL);
2124         if (xp == NULL)
2125                 return -ENOBUFS;
2126
2127         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2128                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2129         xp->priority = pol->sadb_x_policy_priority;
2130
2131         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 
2132         xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2133         if (!xp->family) {
2134                 err = -EINVAL;
2135                 goto out;
2136         }
2137         xp->selector.family = xp->family;
2138         xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2139         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2140         xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2141         if (xp->selector.sport)
2142                 xp->selector.sport_mask = ~0;
2143
2144         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], 
2145         pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2146         xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2147
2148         /* Amusing, we set this twice.  KAME apps appear to set same value
2149          * in both addresses.
2150          */
2151         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2152
2153         xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2154         if (xp->selector.dport)
2155                 xp->selector.dport_mask = ~0;
2156
2157         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2158         if (sec_ctx != NULL) {
2159                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2160
2161                 if (!uctx) {
2162                         err = -ENOBUFS;
2163                         goto out;
2164                 }
2165
2166                 err = security_xfrm_policy_alloc(xp, uctx);
2167                 kfree(uctx);
2168
2169                 if (err)
2170                         goto out;
2171         }
2172
2173         xp->lft.soft_byte_limit = XFRM_INF;
2174         xp->lft.hard_byte_limit = XFRM_INF;
2175         xp->lft.soft_packet_limit = XFRM_INF;
2176         xp->lft.hard_packet_limit = XFRM_INF;
2177         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2178                 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2179                 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2180                 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2181                 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2182         }
2183         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2184                 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2185                 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2186                 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2187                 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2188         }
2189         xp->xfrm_nr = 0;
2190         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2191             (err = parse_ipsecrequests(xp, pol)) < 0)
2192                 goto out;
2193
2194         err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2195                                  hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2196
2197         if (err)
2198                 goto out;
2199
2200         if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2201                 c.event = XFRM_MSG_UPDPOLICY;
2202         else 
2203                 c.event = XFRM_MSG_NEWPOLICY;
2204
2205         c.seq = hdr->sadb_msg_seq;
2206         c.pid = hdr->sadb_msg_pid;
2207
2208         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2209         xfrm_pol_put(xp);
2210         return 0;
2211
2212 out:
2213         security_xfrm_policy_free(xp);
2214         kfree(xp);
2215         return err;
2216 }
2217
2218 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2219 {
2220         int err;
2221         struct sadb_address *sa;
2222         struct sadb_x_policy *pol;
2223         struct xfrm_policy *xp, tmp;
2224         struct xfrm_selector sel;
2225         struct km_event c;
2226         struct sadb_x_sec_ctx *sec_ctx;
2227
2228         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2229                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2230             !ext_hdrs[SADB_X_EXT_POLICY-1])
2231                 return -EINVAL;
2232
2233         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2234         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2235                 return -EINVAL;
2236
2237         memset(&sel, 0, sizeof(sel));
2238
2239         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 
2240         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2241         sel.prefixlen_s = sa->sadb_address_prefixlen;
2242         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2243         sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2244         if (sel.sport)
2245                 sel.sport_mask = ~0;
2246
2247         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], 
2248         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2249         sel.prefixlen_d = sa->sadb_address_prefixlen;
2250         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2251         sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2252         if (sel.dport)
2253                 sel.dport_mask = ~0;
2254
2255         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2256         memset(&tmp, 0, sizeof(struct xfrm_policy));
2257
2258         if (sec_ctx != NULL) {
2259                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2260
2261                 if (!uctx)
2262                         return -ENOMEM;
2263
2264                 err = security_xfrm_policy_alloc(&tmp, uctx);
2265                 kfree(uctx);
2266
2267                 if (err)
2268                         return err;
2269         }
2270
2271         xp = xfrm_policy_bysel_ctx(pol->sadb_x_policy_dir-1, &sel, tmp.security, 1);
2272         security_xfrm_policy_free(&tmp);
2273         if (xp == NULL)
2274                 return -ENOENT;
2275
2276         err = 0;
2277
2278         if ((err = security_xfrm_policy_delete(xp)))
2279                 goto out;
2280         c.seq = hdr->sadb_msg_seq;
2281         c.pid = hdr->sadb_msg_pid;
2282         c.event = XFRM_MSG_DELPOLICY;
2283         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2284
2285 out:
2286         xfrm_pol_put(xp);
2287         return err;
2288 }
2289
2290 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2291 {
2292         int err;
2293         struct sk_buff *out_skb;
2294         struct sadb_msg *out_hdr;
2295         err = 0;
2296
2297         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2298         if (IS_ERR(out_skb)) {
2299                 err =  PTR_ERR(out_skb);
2300                 goto out;
2301         }
2302         pfkey_xfrm_policy2msg(out_skb, xp, dir);
2303
2304         out_hdr = (struct sadb_msg *) out_skb->data;
2305         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2306         out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2307         out_hdr->sadb_msg_satype = 0;
2308         out_hdr->sadb_msg_errno = 0;
2309         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2310         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2311         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2312         err = 0;
2313
2314 out:
2315         return err;
2316 }
2317
2318 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2319 {
2320         unsigned int dir;
2321         int err;
2322         struct sadb_x_policy *pol;
2323         struct xfrm_policy *xp;
2324         struct km_event c;
2325
2326         if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2327                 return -EINVAL;
2328
2329         dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2330         if (dir >= XFRM_POLICY_MAX)
2331                 return -EINVAL;
2332
2333         xp = xfrm_policy_byid(dir, pol->sadb_x_policy_id,
2334                               hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2335         if (xp == NULL)
2336                 return -ENOENT;
2337
2338         err = 0;
2339
2340         c.seq = hdr->sadb_msg_seq;
2341         c.pid = hdr->sadb_msg_pid;
2342         if (hdr->sadb_msg_type == SADB_X_SPDDELETE2) {
2343                 c.data.byid = 1;
2344                 c.event = XFRM_MSG_DELPOLICY;
2345                 km_policy_notify(xp, dir, &c);
2346         } else {
2347                 err = key_pol_get_resp(sk, xp, hdr, dir);
2348         }
2349
2350         xfrm_pol_put(xp);
2351         return err;
2352 }
2353
2354 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2355 {
2356         struct pfkey_dump_data *data = ptr;
2357         struct sk_buff *out_skb;
2358         struct sadb_msg *out_hdr;
2359
2360         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2361         if (IS_ERR(out_skb))
2362                 return PTR_ERR(out_skb);
2363
2364         pfkey_xfrm_policy2msg(out_skb, xp, dir);
2365
2366         out_hdr = (struct sadb_msg *) out_skb->data;
2367         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2368         out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2369         out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2370         out_hdr->sadb_msg_errno = 0;
2371         out_hdr->sadb_msg_seq = count;
2372         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2373         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2374         return 0;
2375 }
2376
2377 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2378 {
2379         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2380
2381         return xfrm_policy_walk(dump_sp, &data);
2382 }
2383
2384 static int key_notify_policy_flush(struct km_event *c)
2385 {
2386         struct sk_buff *skb_out;
2387         struct sadb_msg *hdr;
2388
2389         skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2390         if (!skb_out)
2391                 return -ENOBUFS;
2392         hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2393         hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2394         hdr->sadb_msg_seq = c->seq;
2395         hdr->sadb_msg_pid = c->pid;
2396         hdr->sadb_msg_version = PF_KEY_V2;
2397         hdr->sadb_msg_errno = (uint8_t) 0;
2398         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2399         pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2400         return 0;
2401
2402 }
2403
2404 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2405 {
2406         struct km_event c;
2407
2408         xfrm_policy_flush();
2409         c.event = XFRM_MSG_FLUSHPOLICY;
2410         c.pid = hdr->sadb_msg_pid;
2411         c.seq = hdr->sadb_msg_seq;
2412         km_policy_notify(NULL, 0, &c);
2413
2414         return 0;
2415 }
2416
2417 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2418                              struct sadb_msg *hdr, void **ext_hdrs);
2419 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2420         [SADB_RESERVED]         = pfkey_reserved,
2421         [SADB_GETSPI]           = pfkey_getspi,
2422         [SADB_UPDATE]           = pfkey_add,
2423         [SADB_ADD]              = pfkey_add,
2424         [SADB_DELETE]           = pfkey_delete,
2425         [SADB_GET]              = pfkey_get,
2426         [SADB_ACQUIRE]          = pfkey_acquire,
2427         [SADB_REGISTER]         = pfkey_register,
2428         [SADB_EXPIRE]           = NULL,
2429         [SADB_FLUSH]            = pfkey_flush,
2430         [SADB_DUMP]             = pfkey_dump,
2431         [SADB_X_PROMISC]        = pfkey_promisc,
2432         [SADB_X_PCHANGE]        = NULL,
2433         [SADB_X_SPDUPDATE]      = pfkey_spdadd,
2434         [SADB_X_SPDADD]         = pfkey_spdadd,
2435         [SADB_X_SPDDELETE]      = pfkey_spddelete,
2436         [SADB_X_SPDGET]         = pfkey_spdget,
2437         [SADB_X_SPDACQUIRE]     = NULL,
2438         [SADB_X_SPDDUMP]        = pfkey_spddump,
2439         [SADB_X_SPDFLUSH]       = pfkey_spdflush,
2440         [SADB_X_SPDSETIDX]      = pfkey_spdadd,
2441         [SADB_X_SPDDELETE2]     = pfkey_spdget,
2442 };
2443
2444 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2445 {
2446         void *ext_hdrs[SADB_EXT_MAX];
2447         int err;
2448
2449         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2450                         BROADCAST_PROMISC_ONLY, NULL);
2451
2452         memset(ext_hdrs, 0, sizeof(ext_hdrs));
2453         err = parse_exthdrs(skb, hdr, ext_hdrs);
2454         if (!err) {
2455                 err = -EOPNOTSUPP;
2456                 if (pfkey_funcs[hdr->sadb_msg_type])
2457                         err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2458         }
2459         return err;
2460 }
2461
2462 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2463 {
2464         struct sadb_msg *hdr = NULL;
2465
2466         if (skb->len < sizeof(*hdr)) {
2467                 *errp = -EMSGSIZE;
2468         } else {
2469                 hdr = (struct sadb_msg *) skb->data;
2470                 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2471                     hdr->sadb_msg_reserved != 0 ||
2472                     (hdr->sadb_msg_type <= SADB_RESERVED ||
2473                      hdr->sadb_msg_type > SADB_MAX)) {
2474                         hdr = NULL;
2475                         *errp = -EINVAL;
2476                 } else if (hdr->sadb_msg_len != (skb->len /
2477                                                  sizeof(uint64_t)) ||
2478                            hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2479                                                 sizeof(uint64_t))) {
2480                         hdr = NULL;
2481                         *errp = -EMSGSIZE;
2482                 } else {
2483                         *errp = 0;
2484                 }
2485         }
2486         return hdr;
2487 }
2488
2489 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2490 {
2491         return t->aalgos & (1 << d->desc.sadb_alg_id);
2492 }
2493
2494 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2495 {
2496         return t->ealgos & (1 << d->desc.sadb_alg_id);
2497 }
2498
2499 static int count_ah_combs(struct xfrm_tmpl *t)
2500 {
2501         int i, sz = 0;
2502
2503         for (i = 0; ; i++) {
2504                 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2505                 if (!aalg)
2506                         break;
2507                 if (aalg_tmpl_set(t, aalg) && aalg->available)
2508                         sz += sizeof(struct sadb_comb);
2509         }
2510         return sz + sizeof(struct sadb_prop);
2511 }
2512
2513 static int count_esp_combs(struct xfrm_tmpl *t)
2514 {
2515         int i, k, sz = 0;
2516
2517         for (i = 0; ; i++) {
2518                 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2519                 if (!ealg)
2520                         break;
2521                         
2522                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2523                         continue;
2524                         
2525                 for (k = 1; ; k++) {
2526                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2527                         if (!aalg)
2528                                 break;
2529                                 
2530                         if (aalg_tmpl_set(t, aalg) && aalg->available)
2531                                 sz += sizeof(struct sadb_comb);
2532                 }
2533         }
2534         return sz + sizeof(struct sadb_prop);
2535 }
2536
2537 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2538 {
2539         struct sadb_prop *p;
2540         int i;
2541
2542         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2543         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2544         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2545         p->sadb_prop_replay = 32;
2546         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2547
2548         for (i = 0; ; i++) {
2549                 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2550                 if (!aalg)
2551                         break;
2552
2553                 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2554                         struct sadb_comb *c;
2555                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2556                         memset(c, 0, sizeof(*c));
2557                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2558                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2559                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2560                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2561                         c->sadb_comb_hard_addtime = 24*60*60;
2562                         c->sadb_comb_soft_addtime = 20*60*60;
2563                         c->sadb_comb_hard_usetime = 8*60*60;
2564                         c->sadb_comb_soft_usetime = 7*60*60;
2565                 }
2566         }
2567 }
2568
2569 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2570 {
2571         struct sadb_prop *p;
2572         int i, k;
2573
2574         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2575         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2576         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2577         p->sadb_prop_replay = 32;
2578         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2579
2580         for (i=0; ; i++) {
2581                 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2582                 if (!ealg)
2583                         break;
2584         
2585                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2586                         continue;
2587                         
2588                 for (k = 1; ; k++) {
2589                         struct sadb_comb *c;
2590                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2591                         if (!aalg)
2592                                 break;
2593                         if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2594                                 continue;
2595                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2596                         memset(c, 0, sizeof(*c));
2597                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2598                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2599                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2600                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2601                         c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2602                         c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2603                         c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2604                         c->sadb_comb_hard_addtime = 24*60*60;
2605                         c->sadb_comb_soft_addtime = 20*60*60;
2606                         c->sadb_comb_hard_usetime = 8*60*60;
2607                         c->sadb_comb_soft_usetime = 7*60*60;
2608                 }
2609         }
2610 }
2611
2612 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2613 {
2614         return 0;
2615 }
2616
2617 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2618 {
2619         struct sk_buff *out_skb;
2620         struct sadb_msg *out_hdr;
2621         int hard;
2622         int hsc;
2623
2624         hard = c->data.hard;
2625         if (hard)
2626                 hsc = 2;
2627         else
2628                 hsc = 1;
2629
2630         out_skb = pfkey_xfrm_state2msg(x, 0, hsc);
2631         if (IS_ERR(out_skb))
2632                 return PTR_ERR(out_skb);
2633
2634         out_hdr = (struct sadb_msg *) out_skb->data;
2635         out_hdr->sadb_msg_version = PF_KEY_V2;
2636         out_hdr->sadb_msg_type = SADB_EXPIRE;
2637         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2638         out_hdr->sadb_msg_errno = 0;
2639         out_hdr->sadb_msg_reserved = 0;
2640         out_hdr->sadb_msg_seq = 0;
2641         out_hdr->sadb_msg_pid = 0;
2642
2643         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2644         return 0;
2645 }
2646
2647 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2648 {
2649         switch (c->event) {
2650         case XFRM_MSG_EXPIRE:
2651                 return key_notify_sa_expire(x, c);
2652         case XFRM_MSG_DELSA:
2653         case XFRM_MSG_NEWSA:
2654         case XFRM_MSG_UPDSA:
2655                 return key_notify_sa(x, c);
2656         case XFRM_MSG_FLUSHSA:
2657                 return key_notify_sa_flush(c);
2658         case XFRM_MSG_NEWAE: /* not yet supported */
2659                 break;
2660         default:
2661                 printk("pfkey: Unknown SA event %d\n", c->event);
2662                 break;
2663         }
2664
2665         return 0;
2666 }
2667
2668 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2669 {
2670         switch (c->event) {
2671         case XFRM_MSG_POLEXPIRE:
2672                 return key_notify_policy_expire(xp, c);
2673         case XFRM_MSG_DELPOLICY:
2674         case XFRM_MSG_NEWPOLICY:
2675         case XFRM_MSG_UPDPOLICY:
2676                 return key_notify_policy(xp, dir, c);
2677         case XFRM_MSG_FLUSHPOLICY:
2678                 return key_notify_policy_flush(c);
2679         default:
2680                 printk("pfkey: Unknown policy event %d\n", c->event);
2681                 break;
2682         }
2683
2684         return 0;
2685 }
2686
2687 static u32 get_acqseq(void)
2688 {
2689         u32 res;
2690         static u32 acqseq;
2691         static DEFINE_SPINLOCK(acqseq_lock);
2692
2693         spin_lock_bh(&acqseq_lock);
2694         res = (++acqseq ? : ++acqseq);
2695         spin_unlock_bh(&acqseq_lock);
2696         return res;
2697 }
2698
2699 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
2700 {
2701         struct sk_buff *skb;
2702         struct sadb_msg *hdr;
2703         struct sadb_address *addr;
2704         struct sadb_x_policy *pol;
2705         struct sockaddr_in *sin;
2706 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2707         struct sockaddr_in6 *sin6;
2708 #endif
2709         int sockaddr_size;
2710         int size;
2711         struct sadb_x_sec_ctx *sec_ctx;
2712         struct xfrm_sec_ctx *xfrm_ctx;
2713         int ctx_size = 0;
2714         
2715         sockaddr_size = pfkey_sockaddr_size(x->props.family);
2716         if (!sockaddr_size)
2717                 return -EINVAL;
2718
2719         size = sizeof(struct sadb_msg) +
2720                 (sizeof(struct sadb_address) * 2) +
2721                 (sockaddr_size * 2) +
2722                 sizeof(struct sadb_x_policy);
2723         
2724         if (x->id.proto == IPPROTO_AH)
2725                 size += count_ah_combs(t);
2726         else if (x->id.proto == IPPROTO_ESP)
2727                 size += count_esp_combs(t);
2728
2729         if ((xfrm_ctx = x->security)) {
2730                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
2731                 size +=  sizeof(struct sadb_x_sec_ctx) + ctx_size;
2732         }
2733
2734         skb =  alloc_skb(size + 16, GFP_ATOMIC);
2735         if (skb == NULL)
2736                 return -ENOMEM;
2737         
2738         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2739         hdr->sadb_msg_version = PF_KEY_V2;
2740         hdr->sadb_msg_type = SADB_ACQUIRE;
2741         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2742         hdr->sadb_msg_len = size / sizeof(uint64_t);
2743         hdr->sadb_msg_errno = 0;
2744         hdr->sadb_msg_reserved = 0;
2745         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
2746         hdr->sadb_msg_pid = 0;
2747
2748         /* src address */
2749         addr = (struct sadb_address*) skb_put(skb, 
2750                                               sizeof(struct sadb_address)+sockaddr_size);
2751         addr->sadb_address_len = 
2752                 (sizeof(struct sadb_address)+sockaddr_size)/
2753                         sizeof(uint64_t);
2754         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2755         addr->sadb_address_proto = 0;
2756         addr->sadb_address_reserved = 0;
2757         if (x->props.family == AF_INET) {
2758                 addr->sadb_address_prefixlen = 32;
2759
2760                 sin = (struct sockaddr_in *) (addr + 1);
2761                 sin->sin_family = AF_INET;
2762                 sin->sin_addr.s_addr = x->props.saddr.a4;
2763                 sin->sin_port = 0;
2764                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2765         }
2766 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2767         else if (x->props.family == AF_INET6) {
2768                 addr->sadb_address_prefixlen = 128;
2769
2770                 sin6 = (struct sockaddr_in6 *) (addr + 1);
2771                 sin6->sin6_family = AF_INET6;
2772                 sin6->sin6_port = 0;
2773                 sin6->sin6_flowinfo = 0;
2774                 memcpy(&sin6->sin6_addr,
2775                        x->props.saddr.a6, sizeof(struct in6_addr));
2776                 sin6->sin6_scope_id = 0;
2777         }
2778 #endif
2779         else
2780                 BUG();
2781         
2782         /* dst address */
2783         addr = (struct sadb_address*) skb_put(skb, 
2784                                               sizeof(struct sadb_address)+sockaddr_size);
2785         addr->sadb_address_len =
2786                 (sizeof(struct sadb_address)+sockaddr_size)/
2787                         sizeof(uint64_t);
2788         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2789         addr->sadb_address_proto = 0;
2790         addr->sadb_address_reserved = 0;
2791         if (x->props.family == AF_INET) {
2792                 addr->sadb_address_prefixlen = 32; 
2793
2794                 sin = (struct sockaddr_in *) (addr + 1);
2795                 sin->sin_family = AF_INET;
2796                 sin->sin_addr.s_addr = x->id.daddr.a4;
2797                 sin->sin_port = 0;
2798                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2799         }
2800 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2801         else if (x->props.family == AF_INET6) {
2802                 addr->sadb_address_prefixlen = 128; 
2803
2804                 sin6 = (struct sockaddr_in6 *) (addr + 1);
2805                 sin6->sin6_family = AF_INET6;
2806                 sin6->sin6_port = 0;
2807                 sin6->sin6_flowinfo = 0;
2808                 memcpy(&sin6->sin6_addr,
2809                        x->id.daddr.a6, sizeof(struct in6_addr));
2810                 sin6->sin6_scope_id = 0;
2811         }
2812 #endif
2813         else
2814                 BUG();
2815
2816         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
2817         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2818         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2819         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2820         pol->sadb_x_policy_dir = dir+1;
2821         pol->sadb_x_policy_id = xp->index;
2822
2823         /* Set sadb_comb's. */
2824         if (x->id.proto == IPPROTO_AH)
2825                 dump_ah_combs(skb, t);
2826         else if (x->id.proto == IPPROTO_ESP)
2827                 dump_esp_combs(skb, t);
2828
2829         /* security context */
2830         if (xfrm_ctx) {
2831                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
2832                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
2833                 sec_ctx->sadb_x_sec_len =
2834                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
2835                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2836                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2837                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2838                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2839                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2840                        xfrm_ctx->ctx_len);
2841         }
2842
2843         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2844 }
2845
2846 static struct xfrm_policy *pfkey_compile_policy(u16 family, int opt,
2847                                                 u8 *data, int len, int *dir)
2848 {
2849         struct xfrm_policy *xp;
2850         struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
2851         struct sadb_x_sec_ctx *sec_ctx;
2852
2853         switch (family) {
2854         case AF_INET:
2855                 if (opt != IP_IPSEC_POLICY) {
2856                         *dir = -EOPNOTSUPP;
2857                         return NULL;
2858                 }
2859                 break;
2860 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2861         case AF_INET6:
2862                 if (opt != IPV6_IPSEC_POLICY) {
2863                         *dir = -EOPNOTSUPP;
2864                         return NULL;
2865                 }
2866                 break;
2867 #endif
2868         default:
2869                 *dir = -EINVAL;
2870                 return NULL;
2871         }
2872
2873         *dir = -EINVAL;
2874
2875         if (len < sizeof(struct sadb_x_policy) ||
2876             pol->sadb_x_policy_len*8 > len ||
2877             pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
2878             (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
2879                 return NULL;
2880
2881         xp = xfrm_policy_alloc(GFP_ATOMIC);
2882         if (xp == NULL) {
2883                 *dir = -ENOBUFS;
2884                 return NULL;
2885         }
2886
2887         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2888                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2889
2890         xp->lft.soft_byte_limit = XFRM_INF;
2891         xp->lft.hard_byte_limit = XFRM_INF;
2892         xp->lft.soft_packet_limit = XFRM_INF;
2893         xp->lft.hard_packet_limit = XFRM_INF;
2894         xp->family = family;
2895
2896         xp->xfrm_nr = 0;
2897         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2898             (*dir = parse_ipsecrequests(xp, pol)) < 0)
2899                 goto out;
2900
2901         /* security context too */
2902         if (len >= (pol->sadb_x_policy_len*8 +
2903             sizeof(struct sadb_x_sec_ctx))) {
2904                 char *p = (char *)pol;
2905                 struct xfrm_user_sec_ctx *uctx;
2906
2907                 p += pol->sadb_x_policy_len*8;
2908                 sec_ctx = (struct sadb_x_sec_ctx *)p;
2909                 if (len < pol->sadb_x_policy_len*8 +
2910                     sec_ctx->sadb_x_sec_len)
2911                         goto out;
2912                 if ((*dir = verify_sec_ctx_len(p)))
2913                         goto out;
2914                 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2915                 *dir = security_xfrm_policy_alloc(xp, uctx);
2916                 kfree(uctx);
2917
2918                 if (*dir)
2919                         goto out;
2920         }
2921
2922         *dir = pol->sadb_x_policy_dir-1;
2923         return xp;
2924
2925 out:
2926         security_xfrm_policy_free(xp);
2927         kfree(xp);
2928         return NULL;
2929 }
2930
2931 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport)
2932 {
2933         struct sk_buff *skb;
2934         struct sadb_msg *hdr;
2935         struct sadb_sa *sa;
2936         struct sadb_address *addr;
2937         struct sadb_x_nat_t_port *n_port;
2938         struct sockaddr_in *sin;
2939 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2940         struct sockaddr_in6 *sin6;
2941 #endif
2942         int sockaddr_size;
2943         int size;
2944         __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
2945         struct xfrm_encap_tmpl *natt = NULL;
2946
2947         sockaddr_size = pfkey_sockaddr_size(x->props.family);
2948         if (!sockaddr_size)
2949                 return -EINVAL;
2950
2951         if (!satype)
2952                 return -EINVAL;
2953
2954         if (!x->encap)
2955                 return -EINVAL;
2956
2957         natt = x->encap;
2958
2959         /* Build an SADB_X_NAT_T_NEW_MAPPING message:
2960          *
2961          * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
2962          * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
2963          */
2964         
2965         size = sizeof(struct sadb_msg) +
2966                 sizeof(struct sadb_sa) +
2967                 (sizeof(struct sadb_address) * 2) +
2968                 (sockaddr_size * 2) +
2969                 (sizeof(struct sadb_x_nat_t_port) * 2);
2970         
2971         skb =  alloc_skb(size + 16, GFP_ATOMIC);
2972         if (skb == NULL)
2973                 return -ENOMEM;
2974         
2975         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2976         hdr->sadb_msg_version = PF_KEY_V2;
2977         hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
2978         hdr->sadb_msg_satype = satype;
2979         hdr->sadb_msg_len = size / sizeof(uint64_t);
2980         hdr->sadb_msg_errno = 0;
2981         hdr->sadb_msg_reserved = 0;
2982         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
2983         hdr->sadb_msg_pid = 0;
2984
2985         /* SA */
2986         sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
2987         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
2988         sa->sadb_sa_exttype = SADB_EXT_SA;
2989         sa->sadb_sa_spi = x->id.spi;
2990         sa->sadb_sa_replay = 0;
2991         sa->sadb_sa_state = 0;
2992         sa->sadb_sa_auth = 0;
2993         sa->sadb_sa_encrypt = 0;
2994         sa->sadb_sa_flags = 0;
2995
2996         /* ADDRESS_SRC (old addr) */
2997         addr = (struct sadb_address*)
2998                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
2999         addr->sadb_address_len = 
3000                 (sizeof(struct sadb_address)+sockaddr_size)/
3001                         sizeof(uint64_t);
3002         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3003         addr->sadb_address_proto = 0;
3004         addr->sadb_address_reserved = 0;
3005         if (x->props.family == AF_INET) {
3006                 addr->sadb_address_prefixlen = 32;
3007
3008                 sin = (struct sockaddr_in *) (addr + 1);
3009                 sin->sin_family = AF_INET;
3010                 sin->sin_addr.s_addr = x->props.saddr.a4;
3011                 sin->sin_port = 0;
3012                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3013         }
3014 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3015         else if (x->props.family == AF_INET6) {
3016                 addr->sadb_address_prefixlen = 128;
3017
3018                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3019                 sin6->sin6_family = AF_INET6;
3020                 sin6->sin6_port = 0;
3021                 sin6->sin6_flowinfo = 0;
3022                 memcpy(&sin6->sin6_addr,
3023                        x->props.saddr.a6, sizeof(struct in6_addr));
3024                 sin6->sin6_scope_id = 0;
3025         }
3026 #endif
3027         else
3028                 BUG();
3029
3030         /* NAT_T_SPORT (old port) */
3031         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3032         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3033         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3034         n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3035         n_port->sadb_x_nat_t_port_reserved = 0;
3036
3037         /* ADDRESS_DST (new addr) */
3038         addr = (struct sadb_address*)
3039                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3040         addr->sadb_address_len = 
3041                 (sizeof(struct sadb_address)+sockaddr_size)/
3042                         sizeof(uint64_t);
3043         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3044         addr->sadb_address_proto = 0;
3045         addr->sadb_address_reserved = 0;
3046         if (x->props.family == AF_INET) {
3047                 addr->sadb_address_prefixlen = 32;
3048
3049                 sin = (struct sockaddr_in *) (addr + 1);
3050                 sin->sin_family = AF_INET;
3051                 sin->sin_addr.s_addr = ipaddr->a4;
3052                 sin->sin_port = 0;
3053                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3054         }
3055 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3056         else if (x->props.family == AF_INET6) {
3057                 addr->sadb_address_prefixlen = 128;
3058
3059                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3060                 sin6->sin6_family = AF_INET6;
3061                 sin6->sin6_port = 0;
3062                 sin6->sin6_flowinfo = 0;
3063                 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3064                 sin6->sin6_scope_id = 0;
3065         }
3066 #endif
3067         else
3068                 BUG();
3069
3070         /* NAT_T_DPORT (new port) */
3071         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3072         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3073         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3074         n_port->sadb_x_nat_t_port_port = sport;
3075         n_port->sadb_x_nat_t_port_reserved = 0;
3076
3077         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3078 }
3079
3080 static int pfkey_sendmsg(struct kiocb *kiocb,
3081                          struct socket *sock, struct msghdr *msg, size_t len)
3082 {
3083         struct sock *sk = sock->sk;
3084         struct sk_buff *skb = NULL;
3085         struct sadb_msg *hdr = NULL;
3086         int err;
3087
3088         err = -EOPNOTSUPP;
3089         if (msg->msg_flags & MSG_OOB)
3090                 goto out;
3091
3092         err = -EMSGSIZE;
3093         if ((unsigned)len > sk->sk_sndbuf - 32)
3094                 goto out;
3095
3096         err = -ENOBUFS;
3097         skb = alloc_skb(len, GFP_KERNEL);
3098         if (skb == NULL)
3099                 goto out;
3100
3101         err = -EFAULT;
3102         if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3103                 goto out;
3104
3105         hdr = pfkey_get_base_msg(skb, &err);
3106         if (!hdr)
3107                 goto out;
3108
3109         mutex_lock(&xfrm_cfg_mutex);
3110         err = pfkey_process(sk, skb, hdr);
3111         mutex_unlock(&xfrm_cfg_mutex);
3112
3113 out:
3114         if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3115                 err = 0;
3116         if (skb)
3117                 kfree_skb(skb);
3118
3119         return err ? : len;
3120 }
3121
3122 static int pfkey_recvmsg(struct kiocb *kiocb,
3123                          struct socket *sock, struct msghdr *msg, size_t len,
3124                          int flags)
3125 {
3126         struct sock *sk = sock->sk;
3127         struct sk_buff *skb;
3128         int copied, err;
3129
3130         err = -EINVAL;
3131         if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3132                 goto out;
3133
3134         msg->msg_namelen = 0;
3135         skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3136         if (skb == NULL)
3137                 goto out;
3138
3139         copied = skb->len;
3140         if (copied > len) {
3141                 msg->msg_flags |= MSG_TRUNC;
3142                 copied = len;
3143         }
3144
3145         skb->h.raw = skb->data;
3146         err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3147         if (err)
3148                 goto out_free;
3149
3150         sock_recv_timestamp(msg, sk, skb);
3151
3152         err = (flags & MSG_TRUNC) ? skb->len : copied;
3153
3154 out_free:
3155         skb_free_datagram(sk, skb);
3156 out:
3157         return err;
3158 }
3159
3160 static const struct proto_ops pfkey_ops = {
3161         .family         =       PF_KEY,
3162         .owner          =       THIS_MODULE,
3163         /* Operations that make no sense on pfkey sockets. */
3164         .bind           =       sock_no_bind,
3165         .connect        =       sock_no_connect,
3166         .socketpair     =       sock_no_socketpair,
3167         .accept         =       sock_no_accept,
3168         .getname        =       sock_no_getname,
3169         .ioctl          =       sock_no_ioctl,
3170         .listen         =       sock_no_listen,
3171         .shutdown       =       sock_no_shutdown,
3172         .setsockopt     =       sock_no_setsockopt,
3173         .getsockopt     =       sock_no_getsockopt,
3174         .mmap           =       sock_no_mmap,
3175         .sendpage       =       sock_no_sendpage,
3176
3177         /* Now the operations that really occur. */
3178         .release        =       pfkey_release,
3179         .poll           =       datagram_poll,
3180         .sendmsg        =       pfkey_sendmsg,
3181         .recvmsg        =       pfkey_recvmsg,
3182 };
3183
3184 static struct net_proto_family pfkey_family_ops = {
3185         .family =       PF_KEY,
3186         .create =       pfkey_create,
3187         .owner  =       THIS_MODULE,
3188 };
3189
3190 #ifdef CONFIG_PROC_FS
3191 static int pfkey_read_proc(char *buffer, char **start, off_t offset,
3192                            int length, int *eof, void *data)
3193 {
3194         off_t pos = 0;
3195         off_t begin = 0;
3196         int len = 0;
3197         struct sock *s;
3198         struct hlist_node *node;
3199
3200         len += sprintf(buffer,"sk       RefCnt Rmem   Wmem   User   Inode\n");
3201
3202         read_lock(&pfkey_table_lock);
3203
3204         sk_for_each(s, node, &pfkey_table) {
3205                 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
3206                                s,
3207                                atomic_read(&s->sk_refcnt),
3208                                atomic_read(&s->sk_rmem_alloc),
3209                                atomic_read(&s->sk_wmem_alloc),
3210                                sock_i_uid(s),
3211                                sock_i_ino(s)
3212                                );
3213
3214                 buffer[len++] = '\n';
3215                 
3216                 pos = begin + len;
3217                 if (pos < offset) {
3218                         len = 0;
3219                         begin = pos;
3220                 }
3221                 if(pos > offset + length)
3222                         goto done;
3223         }
3224         *eof = 1;
3225
3226 done:
3227         read_unlock(&pfkey_table_lock);
3228
3229         *start = buffer + (offset - begin);
3230         len -= (offset - begin);
3231
3232         if (len > length)
3233                 len = length;
3234         if (len < 0)
3235                 len = 0;
3236
3237         return len;
3238 }
3239 #endif
3240
3241 static struct xfrm_mgr pfkeyv2_mgr =
3242 {
3243         .id             = "pfkeyv2",
3244         .notify         = pfkey_send_notify,
3245         .acquire        = pfkey_send_acquire,
3246         .compile_policy = pfkey_compile_policy,
3247         .new_mapping    = pfkey_send_new_mapping,
3248         .notify_policy  = pfkey_send_policy_notify,
3249 };
3250
3251 static void __exit ipsec_pfkey_exit(void)
3252 {
3253         xfrm_unregister_km(&pfkeyv2_mgr);
3254         remove_proc_entry("net/pfkey", NULL);
3255         sock_unregister(PF_KEY);
3256         proto_unregister(&key_proto);
3257 }
3258
3259 static int __init ipsec_pfkey_init(void)
3260 {
3261         int err = proto_register(&key_proto, 0);
3262
3263         if (err != 0)
3264                 goto out;
3265
3266         err = sock_register(&pfkey_family_ops);
3267         if (err != 0)
3268                 goto out_unregister_key_proto;
3269 #ifdef CONFIG_PROC_FS
3270         err = -ENOMEM;
3271         if (create_proc_read_entry("net/pfkey", 0, NULL, pfkey_read_proc, NULL) == NULL)
3272                 goto out_sock_unregister;
3273 #endif
3274         err = xfrm_register_km(&pfkeyv2_mgr);
3275         if (err != 0)
3276                 goto out_remove_proc_entry;
3277 out:
3278         return err;
3279 out_remove_proc_entry:
3280 #ifdef CONFIG_PROC_FS
3281         remove_proc_entry("net/pfkey", NULL);
3282 out_sock_unregister:
3283 #endif
3284         sock_unregister(PF_KEY);
3285 out_unregister_key_proto:
3286         proto_unregister(&key_proto);
3287         goto out;
3288 }
3289
3290 module_init(ipsec_pfkey_init);
3291 module_exit(ipsec_pfkey_exit);
3292 MODULE_LICENSE("GPL");
3293 MODULE_ALIAS_NETPROTO(PF_KEY);