[LSM-IPsec]: SELinux Authorize
[linux-3.10.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/config.h>
18 #include <linux/capability.h>
19 #include <linux/module.h>
20 #include <linux/kernel.h>
21 #include <linux/socket.h>
22 #include <linux/pfkeyv2.h>
23 #include <linux/ipsec.h>
24 #include <linux/skbuff.h>
25 #include <linux/rtnetlink.h>
26 #include <linux/in.h>
27 #include <linux/in6.h>
28 #include <linux/proc_fs.h>
29 #include <linux/init.h>
30 #include <net/xfrm.h>
31
32 #include <net/sock.h>
33
34 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
35 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
36
37
38 /* List of all pfkey sockets. */
39 static HLIST_HEAD(pfkey_table);
40 static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
41 static DEFINE_RWLOCK(pfkey_table_lock);
42 static atomic_t pfkey_table_users = ATOMIC_INIT(0);
43
44 static atomic_t pfkey_socks_nr = ATOMIC_INIT(0);
45
46 struct pfkey_sock {
47         /* struct sock must be the first member of struct pfkey_sock */
48         struct sock     sk;
49         int             registered;
50         int             promisc;
51 };
52
53 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
54 {
55         return (struct pfkey_sock *)sk;
56 }
57
58 static void pfkey_sock_destruct(struct sock *sk)
59 {
60         skb_queue_purge(&sk->sk_receive_queue);
61
62         if (!sock_flag(sk, SOCK_DEAD)) {
63                 printk("Attempt to release alive pfkey socket: %p\n", sk);
64                 return;
65         }
66
67         BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
68         BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
69
70         atomic_dec(&pfkey_socks_nr);
71 }
72
73 static void pfkey_table_grab(void)
74 {
75         write_lock_bh(&pfkey_table_lock);
76
77         if (atomic_read(&pfkey_table_users)) {
78                 DECLARE_WAITQUEUE(wait, current);
79
80                 add_wait_queue_exclusive(&pfkey_table_wait, &wait);
81                 for(;;) {
82                         set_current_state(TASK_UNINTERRUPTIBLE);
83                         if (atomic_read(&pfkey_table_users) == 0)
84                                 break;
85                         write_unlock_bh(&pfkey_table_lock);
86                         schedule();
87                         write_lock_bh(&pfkey_table_lock);
88                 }
89
90                 __set_current_state(TASK_RUNNING);
91                 remove_wait_queue(&pfkey_table_wait, &wait);
92         }
93 }
94
95 static __inline__ void pfkey_table_ungrab(void)
96 {
97         write_unlock_bh(&pfkey_table_lock);
98         wake_up(&pfkey_table_wait);
99 }
100
101 static __inline__ void pfkey_lock_table(void)
102 {
103         /* read_lock() synchronizes us to pfkey_table_grab */
104
105         read_lock(&pfkey_table_lock);
106         atomic_inc(&pfkey_table_users);
107         read_unlock(&pfkey_table_lock);
108 }
109
110 static __inline__ void pfkey_unlock_table(void)
111 {
112         if (atomic_dec_and_test(&pfkey_table_users))
113                 wake_up(&pfkey_table_wait);
114 }
115
116
117 static const struct proto_ops pfkey_ops;
118
119 static void pfkey_insert(struct sock *sk)
120 {
121         pfkey_table_grab();
122         sk_add_node(sk, &pfkey_table);
123         pfkey_table_ungrab();
124 }
125
126 static void pfkey_remove(struct sock *sk)
127 {
128         pfkey_table_grab();
129         sk_del_node_init(sk);
130         pfkey_table_ungrab();
131 }
132
133 static struct proto key_proto = {
134         .name     = "KEY",
135         .owner    = THIS_MODULE,
136         .obj_size = sizeof(struct pfkey_sock),
137 };
138
139 static int pfkey_create(struct socket *sock, int protocol)
140 {
141         struct sock *sk;
142         int err;
143
144         if (!capable(CAP_NET_ADMIN))
145                 return -EPERM;
146         if (sock->type != SOCK_RAW)
147                 return -ESOCKTNOSUPPORT;
148         if (protocol != PF_KEY_V2)
149                 return -EPROTONOSUPPORT;
150
151         err = -ENOMEM;
152         sk = sk_alloc(PF_KEY, GFP_KERNEL, &key_proto, 1);
153         if (sk == NULL)
154                 goto out;
155         
156         sock->ops = &pfkey_ops;
157         sock_init_data(sock, sk);
158
159         sk->sk_family = PF_KEY;
160         sk->sk_destruct = pfkey_sock_destruct;
161
162         atomic_inc(&pfkey_socks_nr);
163
164         pfkey_insert(sk);
165
166         return 0;
167 out:
168         return err;
169 }
170
171 static int pfkey_release(struct socket *sock)
172 {
173         struct sock *sk = sock->sk;
174
175         if (!sk)
176                 return 0;
177
178         pfkey_remove(sk);
179
180         sock_orphan(sk);
181         sock->sk = NULL;
182         skb_queue_purge(&sk->sk_write_queue);
183         sock_put(sk);
184
185         return 0;
186 }
187
188 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
189                                gfp_t allocation, struct sock *sk)
190 {
191         int err = -ENOBUFS;
192
193         sock_hold(sk);
194         if (*skb2 == NULL) {
195                 if (atomic_read(&skb->users) != 1) {
196                         *skb2 = skb_clone(skb, allocation);
197                 } else {
198                         *skb2 = skb;
199                         atomic_inc(&skb->users);
200                 }
201         }
202         if (*skb2 != NULL) {
203                 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
204                         skb_orphan(*skb2);
205                         skb_set_owner_r(*skb2, sk);
206                         skb_queue_tail(&sk->sk_receive_queue, *skb2);
207                         sk->sk_data_ready(sk, (*skb2)->len);
208                         *skb2 = NULL;
209                         err = 0;
210                 }
211         }
212         sock_put(sk);
213         return err;
214 }
215
216 /* Send SKB to all pfkey sockets matching selected criteria.  */
217 #define BROADCAST_ALL           0
218 #define BROADCAST_ONE           1
219 #define BROADCAST_REGISTERED    2
220 #define BROADCAST_PROMISC_ONLY  4
221 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
222                            int broadcast_flags, struct sock *one_sk)
223 {
224         struct sock *sk;
225         struct hlist_node *node;
226         struct sk_buff *skb2 = NULL;
227         int err = -ESRCH;
228
229         /* XXX Do we need something like netlink_overrun?  I think
230          * XXX PF_KEY socket apps will not mind current behavior.
231          */
232         if (!skb)
233                 return -ENOMEM;
234
235         pfkey_lock_table();
236         sk_for_each(sk, node, &pfkey_table) {
237                 struct pfkey_sock *pfk = pfkey_sk(sk);
238                 int err2;
239
240                 /* Yes, it means that if you are meant to receive this
241                  * pfkey message you receive it twice as promiscuous
242                  * socket.
243                  */
244                 if (pfk->promisc)
245                         pfkey_broadcast_one(skb, &skb2, allocation, sk);
246
247                 /* the exact target will be processed later */
248                 if (sk == one_sk)
249                         continue;
250                 if (broadcast_flags != BROADCAST_ALL) {
251                         if (broadcast_flags & BROADCAST_PROMISC_ONLY)
252                                 continue;
253                         if ((broadcast_flags & BROADCAST_REGISTERED) &&
254                             !pfk->registered)
255                                 continue;
256                         if (broadcast_flags & BROADCAST_ONE)
257                                 continue;
258                 }
259
260                 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
261
262                 /* Error is cleare after succecful sending to at least one
263                  * registered KM */
264                 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
265                         err = err2;
266         }
267         pfkey_unlock_table();
268
269         if (one_sk != NULL)
270                 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
271
272         if (skb2)
273                 kfree_skb(skb2);
274         kfree_skb(skb);
275         return err;
276 }
277
278 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
279 {
280         *new = *orig;
281 }
282
283 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
284 {
285         struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
286         struct sadb_msg *hdr;
287
288         if (!skb)
289                 return -ENOBUFS;
290
291         /* Woe be to the platform trying to support PFKEY yet
292          * having normal errnos outside the 1-255 range, inclusive.
293          */
294         err = -err;
295         if (err == ERESTARTSYS ||
296             err == ERESTARTNOHAND ||
297             err == ERESTARTNOINTR)
298                 err = EINTR;
299         if (err >= 512)
300                 err = EINVAL;
301         BUG_ON(err <= 0 || err >= 256);
302
303         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
304         pfkey_hdr_dup(hdr, orig);
305         hdr->sadb_msg_errno = (uint8_t) err;
306         hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
307                              sizeof(uint64_t));
308
309         pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
310
311         return 0;
312 }
313
314 static u8 sadb_ext_min_len[] = {
315         [SADB_EXT_RESERVED]             = (u8) 0,
316         [SADB_EXT_SA]                   = (u8) sizeof(struct sadb_sa),
317         [SADB_EXT_LIFETIME_CURRENT]     = (u8) sizeof(struct sadb_lifetime),
318         [SADB_EXT_LIFETIME_HARD]        = (u8) sizeof(struct sadb_lifetime),
319         [SADB_EXT_LIFETIME_SOFT]        = (u8) sizeof(struct sadb_lifetime),
320         [SADB_EXT_ADDRESS_SRC]          = (u8) sizeof(struct sadb_address),
321         [SADB_EXT_ADDRESS_DST]          = (u8) sizeof(struct sadb_address),
322         [SADB_EXT_ADDRESS_PROXY]        = (u8) sizeof(struct sadb_address),
323         [SADB_EXT_KEY_AUTH]             = (u8) sizeof(struct sadb_key),
324         [SADB_EXT_KEY_ENCRYPT]          = (u8) sizeof(struct sadb_key),
325         [SADB_EXT_IDENTITY_SRC]         = (u8) sizeof(struct sadb_ident),
326         [SADB_EXT_IDENTITY_DST]         = (u8) sizeof(struct sadb_ident),
327         [SADB_EXT_SENSITIVITY]          = (u8) sizeof(struct sadb_sens),
328         [SADB_EXT_PROPOSAL]             = (u8) sizeof(struct sadb_prop),
329         [SADB_EXT_SUPPORTED_AUTH]       = (u8) sizeof(struct sadb_supported),
330         [SADB_EXT_SUPPORTED_ENCRYPT]    = (u8) sizeof(struct sadb_supported),
331         [SADB_EXT_SPIRANGE]             = (u8) sizeof(struct sadb_spirange),
332         [SADB_X_EXT_KMPRIVATE]          = (u8) sizeof(struct sadb_x_kmprivate),
333         [SADB_X_EXT_POLICY]             = (u8) sizeof(struct sadb_x_policy),
334         [SADB_X_EXT_SA2]                = (u8) sizeof(struct sadb_x_sa2),
335         [SADB_X_EXT_NAT_T_TYPE]         = (u8) sizeof(struct sadb_x_nat_t_type),
336         [SADB_X_EXT_NAT_T_SPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
337         [SADB_X_EXT_NAT_T_DPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
338         [SADB_X_EXT_NAT_T_OA]           = (u8) sizeof(struct sadb_address),
339         [SADB_X_EXT_SEC_CTX]            = (u8) sizeof(struct sadb_x_sec_ctx),
340 };
341
342 /* Verify sadb_address_{len,prefixlen} against sa_family.  */
343 static int verify_address_len(void *p)
344 {
345         struct sadb_address *sp = p;
346         struct sockaddr *addr = (struct sockaddr *)(sp + 1);
347         struct sockaddr_in *sin;
348 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
349         struct sockaddr_in6 *sin6;
350 #endif
351         int len;
352
353         switch (addr->sa_family) {
354         case AF_INET:
355                 len  = sizeof(*sp) + sizeof(*sin) + (sizeof(uint64_t) - 1);
356                 len /= sizeof(uint64_t);
357                 if (sp->sadb_address_len != len ||
358                     sp->sadb_address_prefixlen > 32)
359                         return -EINVAL;
360                 break;
361 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
362         case AF_INET6:
363                 len  = sizeof(*sp) + sizeof(*sin6) + (sizeof(uint64_t) - 1);
364                 len /= sizeof(uint64_t);
365                 if (sp->sadb_address_len != len ||
366                     sp->sadb_address_prefixlen > 128)
367                         return -EINVAL;
368                 break;
369 #endif
370         default:
371                 /* It is user using kernel to keep track of security
372                  * associations for another protocol, such as
373                  * OSPF/RSVP/RIPV2/MIP.  It is user's job to verify
374                  * lengths.
375                  *
376                  * XXX Actually, association/policy database is not yet
377                  * XXX able to cope with arbitrary sockaddr families.
378                  * XXX When it can, remove this -EINVAL.  -DaveM
379                  */
380                 return -EINVAL;
381                 break;
382         };
383
384         return 0;
385 }
386
387 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
388 {
389         int len = 0;
390
391         len += sizeof(struct sadb_x_sec_ctx);
392         len += sec_ctx->sadb_x_ctx_len;
393         len += sizeof(uint64_t) - 1;
394         len /= sizeof(uint64_t);
395
396         return len;
397 }
398
399 static inline int verify_sec_ctx_len(void *p)
400 {
401         struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
402         int len;
403
404         if (sec_ctx->sadb_x_ctx_len > PAGE_SIZE)
405                 return -EINVAL;
406
407         len = pfkey_sec_ctx_len(sec_ctx);
408
409         if (sec_ctx->sadb_x_sec_len != len)
410                 return -EINVAL;
411
412         return 0;
413 }
414
415 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
416 {
417         struct xfrm_user_sec_ctx *uctx = NULL;
418         int ctx_size = sec_ctx->sadb_x_ctx_len;
419
420         uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
421
422         if (!uctx)
423                 return NULL;
424
425         uctx->len = pfkey_sec_ctx_len(sec_ctx);
426         uctx->exttype = sec_ctx->sadb_x_sec_exttype;
427         uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
428         uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
429         uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
430         memcpy(uctx + 1, sec_ctx + 1,
431                uctx->ctx_len);
432
433         return uctx;
434 }
435
436 static int present_and_same_family(struct sadb_address *src,
437                                    struct sadb_address *dst)
438 {
439         struct sockaddr *s_addr, *d_addr;
440
441         if (!src || !dst)
442                 return 0;
443
444         s_addr = (struct sockaddr *)(src + 1);
445         d_addr = (struct sockaddr *)(dst + 1);
446         if (s_addr->sa_family != d_addr->sa_family)
447                 return 0;
448         if (s_addr->sa_family != AF_INET
449 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
450             && s_addr->sa_family != AF_INET6
451 #endif
452                 )
453                 return 0;
454
455         return 1;
456 }
457
458 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
459 {
460         char *p = (char *) hdr;
461         int len = skb->len;
462
463         len -= sizeof(*hdr);
464         p += sizeof(*hdr);
465         while (len > 0) {
466                 struct sadb_ext *ehdr = (struct sadb_ext *) p;
467                 uint16_t ext_type;
468                 int ext_len;
469
470                 ext_len  = ehdr->sadb_ext_len;
471                 ext_len *= sizeof(uint64_t);
472                 ext_type = ehdr->sadb_ext_type;
473                 if (ext_len < sizeof(uint64_t) ||
474                     ext_len > len ||
475                     ext_type == SADB_EXT_RESERVED)
476                         return -EINVAL;
477
478                 if (ext_type <= SADB_EXT_MAX) {
479                         int min = (int) sadb_ext_min_len[ext_type];
480                         if (ext_len < min)
481                                 return -EINVAL;
482                         if (ext_hdrs[ext_type-1] != NULL)
483                                 return -EINVAL;
484                         if (ext_type == SADB_EXT_ADDRESS_SRC ||
485                             ext_type == SADB_EXT_ADDRESS_DST ||
486                             ext_type == SADB_EXT_ADDRESS_PROXY ||
487                             ext_type == SADB_X_EXT_NAT_T_OA) {
488                                 if (verify_address_len(p))
489                                         return -EINVAL;
490                         }                               
491                         if (ext_type == SADB_X_EXT_SEC_CTX) {
492                                 if (verify_sec_ctx_len(p))
493                                         return -EINVAL;
494                         }
495                         ext_hdrs[ext_type-1] = p;
496                 }
497                 p   += ext_len;
498                 len -= ext_len;
499         }
500
501         return 0;
502 }
503
504 static uint16_t
505 pfkey_satype2proto(uint8_t satype)
506 {
507         switch (satype) {
508         case SADB_SATYPE_UNSPEC:
509                 return IPSEC_PROTO_ANY;
510         case SADB_SATYPE_AH:
511                 return IPPROTO_AH;
512         case SADB_SATYPE_ESP:
513                 return IPPROTO_ESP;
514         case SADB_X_SATYPE_IPCOMP:
515                 return IPPROTO_COMP;
516                 break;
517         default:
518                 return 0;
519         }
520         /* NOTREACHED */
521 }
522
523 static uint8_t
524 pfkey_proto2satype(uint16_t proto)
525 {
526         switch (proto) {
527         case IPPROTO_AH:
528                 return SADB_SATYPE_AH;
529         case IPPROTO_ESP:
530                 return SADB_SATYPE_ESP;
531         case IPPROTO_COMP:
532                 return SADB_X_SATYPE_IPCOMP;
533                 break;
534         default:
535                 return 0;
536         }
537         /* NOTREACHED */
538 }
539
540 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
541  * say specifically 'just raw sockets' as we encode them as 255.
542  */
543
544 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
545 {
546         return (proto == IPSEC_PROTO_ANY ? 0 : proto);
547 }
548
549 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
550 {
551         return (proto ? proto : IPSEC_PROTO_ANY);
552 }
553
554 static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
555                                      xfrm_address_t *xaddr)
556 {
557         switch (((struct sockaddr*)(addr + 1))->sa_family) {
558         case AF_INET:
559                 xaddr->a4 = 
560                         ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
561                 return AF_INET;
562 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
563         case AF_INET6:
564                 memcpy(xaddr->a6, 
565                        &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
566                        sizeof(struct in6_addr));
567                 return AF_INET6;
568 #endif
569         default:
570                 return 0;
571         }
572         /* NOTREACHED */
573 }
574
575 static struct  xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
576 {
577         struct sadb_sa *sa;
578         struct sadb_address *addr;
579         uint16_t proto;
580         unsigned short family;
581         xfrm_address_t *xaddr;
582
583         sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
584         if (sa == NULL)
585                 return NULL;
586
587         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
588         if (proto == 0)
589                 return NULL;
590
591         /* sadb_address_len should be checked by caller */
592         addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
593         if (addr == NULL)
594                 return NULL;
595
596         family = ((struct sockaddr *)(addr + 1))->sa_family;
597         switch (family) {
598         case AF_INET:
599                 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
600                 break;
601 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
602         case AF_INET6:
603                 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
604                 break;
605 #endif
606         default:
607                 xaddr = NULL;
608         }
609
610         if (!xaddr)
611                 return NULL;
612
613         return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
614 }
615
616 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
617 static int
618 pfkey_sockaddr_size(sa_family_t family)
619 {
620         switch (family) {
621         case AF_INET:
622                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
623 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
624         case AF_INET6:
625                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
626 #endif
627         default:
628                 return 0;
629         }
630         /* NOTREACHED */
631 }
632
633 static struct sk_buff * pfkey_xfrm_state2msg(struct xfrm_state *x, int add_keys, int hsc)
634 {
635         struct sk_buff *skb;
636         struct sadb_msg *hdr;
637         struct sadb_sa *sa;
638         struct sadb_lifetime *lifetime;
639         struct sadb_address *addr;
640         struct sadb_key *key;
641         struct sadb_x_sa2 *sa2;
642         struct sockaddr_in *sin;
643         struct sadb_x_sec_ctx *sec_ctx;
644         struct xfrm_sec_ctx *xfrm_ctx;
645         int ctx_size = 0;
646 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
647         struct sockaddr_in6 *sin6;
648 #endif
649         int size;
650         int auth_key_size = 0;
651         int encrypt_key_size = 0;
652         int sockaddr_size;
653         struct xfrm_encap_tmpl *natt = NULL;
654
655         /* address family check */
656         sockaddr_size = pfkey_sockaddr_size(x->props.family);
657         if (!sockaddr_size)
658                 return ERR_PTR(-EINVAL);
659
660         /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
661            key(AE), (identity(SD),) (sensitivity)> */
662         size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) + 
663                 sizeof(struct sadb_lifetime) +
664                 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
665                 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
666                         sizeof(struct sadb_address)*2 + 
667                                 sockaddr_size*2 +
668                                         sizeof(struct sadb_x_sa2);
669
670         if ((xfrm_ctx = x->security)) {
671                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
672                 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
673         }
674
675         /* identity & sensitivity */
676
677         if ((x->props.family == AF_INET &&
678              x->sel.saddr.a4 != x->props.saddr.a4)
679 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
680             || (x->props.family == AF_INET6 &&
681                 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
682 #endif
683                 )
684                 size += sizeof(struct sadb_address) + sockaddr_size;
685
686         if (add_keys) {
687                 if (x->aalg && x->aalg->alg_key_len) {
688                         auth_key_size = 
689                                 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8); 
690                         size += sizeof(struct sadb_key) + auth_key_size;
691                 }
692                 if (x->ealg && x->ealg->alg_key_len) {
693                         encrypt_key_size = 
694                                 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8); 
695                         size += sizeof(struct sadb_key) + encrypt_key_size;
696                 }
697         }
698         if (x->encap)
699                 natt = x->encap;
700
701         if (natt && natt->encap_type) {
702                 size += sizeof(struct sadb_x_nat_t_type);
703                 size += sizeof(struct sadb_x_nat_t_port);
704                 size += sizeof(struct sadb_x_nat_t_port);
705         }
706
707         skb =  alloc_skb(size + 16, GFP_ATOMIC);
708         if (skb == NULL)
709                 return ERR_PTR(-ENOBUFS);
710
711         /* call should fill header later */
712         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
713         memset(hdr, 0, size);   /* XXX do we need this ? */
714         hdr->sadb_msg_len = size / sizeof(uint64_t);
715
716         /* sa */
717         sa = (struct sadb_sa *)  skb_put(skb, sizeof(struct sadb_sa));
718         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
719         sa->sadb_sa_exttype = SADB_EXT_SA;
720         sa->sadb_sa_spi = x->id.spi;
721         sa->sadb_sa_replay = x->props.replay_window;
722         switch (x->km.state) {
723         case XFRM_STATE_VALID:
724                 sa->sadb_sa_state = x->km.dying ?
725                         SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
726                 break;
727         case XFRM_STATE_ACQ:
728                 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
729                 break;
730         default:
731                 sa->sadb_sa_state = SADB_SASTATE_DEAD;
732                 break;
733         }
734         sa->sadb_sa_auth = 0;
735         if (x->aalg) {
736                 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
737                 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
738         }
739         sa->sadb_sa_encrypt = 0;
740         BUG_ON(x->ealg && x->calg);
741         if (x->ealg) {
742                 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
743                 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
744         }
745         /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
746         if (x->calg) {
747                 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
748                 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
749         }
750
751         sa->sadb_sa_flags = 0;
752         if (x->props.flags & XFRM_STATE_NOECN)
753                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
754         if (x->props.flags & XFRM_STATE_DECAP_DSCP)
755                 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
756         if (x->props.flags & XFRM_STATE_NOPMTUDISC)
757                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
758
759         /* hard time */
760         if (hsc & 2) {
761                 lifetime = (struct sadb_lifetime *)  skb_put(skb, 
762                                                              sizeof(struct sadb_lifetime));
763                 lifetime->sadb_lifetime_len =
764                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
765                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
766                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.hard_packet_limit);
767                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
768                 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
769                 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
770         }
771         /* soft time */
772         if (hsc & 1) {
773                 lifetime = (struct sadb_lifetime *)  skb_put(skb, 
774                                                              sizeof(struct sadb_lifetime));
775                 lifetime->sadb_lifetime_len =
776                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
777                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
778                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.soft_packet_limit);
779                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
780                 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
781                 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
782         }
783         /* current time */
784         lifetime = (struct sadb_lifetime *)  skb_put(skb,
785                                                      sizeof(struct sadb_lifetime));
786         lifetime->sadb_lifetime_len =
787                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
788         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
789         lifetime->sadb_lifetime_allocations = x->curlft.packets;
790         lifetime->sadb_lifetime_bytes = x->curlft.bytes;
791         lifetime->sadb_lifetime_addtime = x->curlft.add_time;
792         lifetime->sadb_lifetime_usetime = x->curlft.use_time;
793         /* src address */
794         addr = (struct sadb_address*) skb_put(skb, 
795                                               sizeof(struct sadb_address)+sockaddr_size);
796         addr->sadb_address_len = 
797                 (sizeof(struct sadb_address)+sockaddr_size)/
798                         sizeof(uint64_t);
799         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
800         /* "if the ports are non-zero, then the sadb_address_proto field, 
801            normally zero, MUST be filled in with the transport 
802            protocol's number." - RFC2367 */
803         addr->sadb_address_proto = 0; 
804         addr->sadb_address_reserved = 0;
805         if (x->props.family == AF_INET) {
806                 addr->sadb_address_prefixlen = 32;
807
808                 sin = (struct sockaddr_in *) (addr + 1);
809                 sin->sin_family = AF_INET;
810                 sin->sin_addr.s_addr = x->props.saddr.a4;
811                 sin->sin_port = 0;
812                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
813         }
814 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
815         else if (x->props.family == AF_INET6) {
816                 addr->sadb_address_prefixlen = 128;
817
818                 sin6 = (struct sockaddr_in6 *) (addr + 1);
819                 sin6->sin6_family = AF_INET6;
820                 sin6->sin6_port = 0;
821                 sin6->sin6_flowinfo = 0;
822                 memcpy(&sin6->sin6_addr, x->props.saddr.a6,
823                        sizeof(struct in6_addr));
824                 sin6->sin6_scope_id = 0;
825         }
826 #endif
827         else
828                 BUG();
829
830         /* dst address */
831         addr = (struct sadb_address*) skb_put(skb, 
832                                               sizeof(struct sadb_address)+sockaddr_size);
833         addr->sadb_address_len = 
834                 (sizeof(struct sadb_address)+sockaddr_size)/
835                         sizeof(uint64_t);
836         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
837         addr->sadb_address_proto = 0; 
838         addr->sadb_address_prefixlen = 32; /* XXX */ 
839         addr->sadb_address_reserved = 0;
840         if (x->props.family == AF_INET) {
841                 sin = (struct sockaddr_in *) (addr + 1);
842                 sin->sin_family = AF_INET;
843                 sin->sin_addr.s_addr = x->id.daddr.a4;
844                 sin->sin_port = 0;
845                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
846
847                 if (x->sel.saddr.a4 != x->props.saddr.a4) {
848                         addr = (struct sadb_address*) skb_put(skb, 
849                                 sizeof(struct sadb_address)+sockaddr_size);
850                         addr->sadb_address_len = 
851                                 (sizeof(struct sadb_address)+sockaddr_size)/
852                                 sizeof(uint64_t);
853                         addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
854                         addr->sadb_address_proto =
855                                 pfkey_proto_from_xfrm(x->sel.proto);
856                         addr->sadb_address_prefixlen = x->sel.prefixlen_s;
857                         addr->sadb_address_reserved = 0;
858
859                         sin = (struct sockaddr_in *) (addr + 1);
860                         sin->sin_family = AF_INET;
861                         sin->sin_addr.s_addr = x->sel.saddr.a4;
862                         sin->sin_port = x->sel.sport;
863                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
864                 }
865         }
866 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
867         else if (x->props.family == AF_INET6) {
868                 addr->sadb_address_prefixlen = 128;
869
870                 sin6 = (struct sockaddr_in6 *) (addr + 1);
871                 sin6->sin6_family = AF_INET6;
872                 sin6->sin6_port = 0;
873                 sin6->sin6_flowinfo = 0;
874                 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
875                 sin6->sin6_scope_id = 0;
876
877                 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
878                             sizeof(struct in6_addr))) {
879                         addr = (struct sadb_address *) skb_put(skb, 
880                                 sizeof(struct sadb_address)+sockaddr_size);
881                         addr->sadb_address_len = 
882                                 (sizeof(struct sadb_address)+sockaddr_size)/
883                                 sizeof(uint64_t);
884                         addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
885                         addr->sadb_address_proto =
886                                 pfkey_proto_from_xfrm(x->sel.proto);
887                         addr->sadb_address_prefixlen = x->sel.prefixlen_s;
888                         addr->sadb_address_reserved = 0;
889
890                         sin6 = (struct sockaddr_in6 *) (addr + 1);
891                         sin6->sin6_family = AF_INET6;
892                         sin6->sin6_port = x->sel.sport;
893                         sin6->sin6_flowinfo = 0;
894                         memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
895                                sizeof(struct in6_addr));
896                         sin6->sin6_scope_id = 0;
897                 }
898         }
899 #endif
900         else
901                 BUG();
902
903         /* auth key */
904         if (add_keys && auth_key_size) {
905                 key = (struct sadb_key *) skb_put(skb, 
906                                                   sizeof(struct sadb_key)+auth_key_size);
907                 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
908                         sizeof(uint64_t);
909                 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
910                 key->sadb_key_bits = x->aalg->alg_key_len;
911                 key->sadb_key_reserved = 0;
912                 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
913         }
914         /* encrypt key */
915         if (add_keys && encrypt_key_size) {
916                 key = (struct sadb_key *) skb_put(skb, 
917                                                   sizeof(struct sadb_key)+encrypt_key_size);
918                 key->sadb_key_len = (sizeof(struct sadb_key) + 
919                                      encrypt_key_size) / sizeof(uint64_t);
920                 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
921                 key->sadb_key_bits = x->ealg->alg_key_len;
922                 key->sadb_key_reserved = 0;
923                 memcpy(key + 1, x->ealg->alg_key, 
924                        (x->ealg->alg_key_len+7)/8);
925         }
926
927         /* sa */
928         sa2 = (struct sadb_x_sa2 *)  skb_put(skb, sizeof(struct sadb_x_sa2));
929         sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
930         sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
931         sa2->sadb_x_sa2_mode = x->props.mode + 1;
932         sa2->sadb_x_sa2_reserved1 = 0;
933         sa2->sadb_x_sa2_reserved2 = 0;
934         sa2->sadb_x_sa2_sequence = 0;
935         sa2->sadb_x_sa2_reqid = x->props.reqid;
936
937         if (natt && natt->encap_type) {
938                 struct sadb_x_nat_t_type *n_type;
939                 struct sadb_x_nat_t_port *n_port;
940
941                 /* type */
942                 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
943                 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
944                 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
945                 n_type->sadb_x_nat_t_type_type = natt->encap_type;
946                 n_type->sadb_x_nat_t_type_reserved[0] = 0;
947                 n_type->sadb_x_nat_t_type_reserved[1] = 0;
948                 n_type->sadb_x_nat_t_type_reserved[2] = 0;
949
950                 /* source port */
951                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
952                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
953                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
954                 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
955                 n_port->sadb_x_nat_t_port_reserved = 0;
956
957                 /* dest port */
958                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
959                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
960                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
961                 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
962                 n_port->sadb_x_nat_t_port_reserved = 0;
963         }
964
965         /* security context */
966         if (xfrm_ctx) {
967                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
968                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
969                 sec_ctx->sadb_x_sec_len =
970                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
971                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
972                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
973                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
974                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
975                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
976                        xfrm_ctx->ctx_len);
977         }
978
979         return skb;
980 }
981
982 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr, 
983                                                 void **ext_hdrs)
984 {
985         struct xfrm_state *x; 
986         struct sadb_lifetime *lifetime;
987         struct sadb_sa *sa;
988         struct sadb_key *key;
989         struct sadb_x_sec_ctx *sec_ctx;
990         uint16_t proto;
991         int err;
992         
993
994         sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
995         if (!sa ||
996             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
997                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
998                 return ERR_PTR(-EINVAL);
999         if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1000             !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1001                 return ERR_PTR(-EINVAL);
1002         if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1003             !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1004                 return ERR_PTR(-EINVAL);
1005         if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1006             !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1007                 return ERR_PTR(-EINVAL);
1008
1009         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1010         if (proto == 0)
1011                 return ERR_PTR(-EINVAL);
1012
1013         /* default error is no buffer space */
1014         err = -ENOBUFS;
1015
1016         /* RFC2367:
1017
1018    Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1019    SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1020    sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1021    Therefore, the sadb_sa_state field of all submitted SAs MUST be
1022    SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1023    not true.
1024
1025            However, KAME setkey always uses SADB_SASTATE_LARVAL.
1026            Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1027          */
1028         if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1029             (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1030              sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1031             sa->sadb_sa_encrypt > SADB_EALG_MAX)
1032                 return ERR_PTR(-EINVAL);
1033         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1034         if (key != NULL &&
1035             sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1036             ((key->sadb_key_bits+7) / 8 == 0 ||
1037              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1038                 return ERR_PTR(-EINVAL);
1039         key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1040         if (key != NULL &&
1041             sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1042             ((key->sadb_key_bits+7) / 8 == 0 ||
1043              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1044                 return ERR_PTR(-EINVAL);
1045
1046         x = xfrm_state_alloc();
1047         if (x == NULL)
1048                 return ERR_PTR(-ENOBUFS);
1049
1050         x->id.proto = proto;
1051         x->id.spi = sa->sadb_sa_spi;
1052         x->props.replay_window = sa->sadb_sa_replay;
1053         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1054                 x->props.flags |= XFRM_STATE_NOECN;
1055         if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1056                 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1057         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1058                 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1059
1060         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1061         if (lifetime != NULL) {
1062                 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1063                 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1064                 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1065                 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1066         }
1067         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1068         if (lifetime != NULL) {
1069                 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1070                 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1071                 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1072                 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1073         }
1074
1075         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1076         if (sec_ctx != NULL) {
1077                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1078
1079                 if (!uctx)
1080                         goto out;
1081
1082                 err = security_xfrm_state_alloc(x, uctx);
1083                 kfree(uctx);
1084
1085                 if (err)
1086                         goto out;
1087         }
1088
1089         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1090         if (sa->sadb_sa_auth) {
1091                 int keysize = 0;
1092                 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1093                 if (!a) {
1094                         err = -ENOSYS;
1095                         goto out;
1096                 }
1097                 if (key)
1098                         keysize = (key->sadb_key_bits + 7) / 8;
1099                 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1100                 if (!x->aalg)
1101                         goto out;
1102                 strcpy(x->aalg->alg_name, a->name);
1103                 x->aalg->alg_key_len = 0;
1104                 if (key) {
1105                         x->aalg->alg_key_len = key->sadb_key_bits;
1106                         memcpy(x->aalg->alg_key, key+1, keysize);
1107                 }
1108                 x->props.aalgo = sa->sadb_sa_auth;
1109                 /* x->algo.flags = sa->sadb_sa_flags; */
1110         }
1111         if (sa->sadb_sa_encrypt) {
1112                 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1113                         struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1114                         if (!a) {
1115                                 err = -ENOSYS;
1116                                 goto out;
1117                         }
1118                         x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1119                         if (!x->calg)
1120                                 goto out;
1121                         strcpy(x->calg->alg_name, a->name);
1122                         x->props.calgo = sa->sadb_sa_encrypt;
1123                 } else {
1124                         int keysize = 0;
1125                         struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1126                         if (!a) {
1127                                 err = -ENOSYS;
1128                                 goto out;
1129                         }
1130                         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1131                         if (key)
1132                                 keysize = (key->sadb_key_bits + 7) / 8;
1133                         x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1134                         if (!x->ealg)
1135                                 goto out;
1136                         strcpy(x->ealg->alg_name, a->name);
1137                         x->ealg->alg_key_len = 0;
1138                         if (key) {
1139                                 x->ealg->alg_key_len = key->sadb_key_bits;
1140                                 memcpy(x->ealg->alg_key, key+1, keysize);
1141                         }
1142                         x->props.ealgo = sa->sadb_sa_encrypt;
1143                 }
1144         }
1145         /* x->algo.flags = sa->sadb_sa_flags; */
1146
1147         x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 
1148                                                     &x->props.saddr);
1149         if (!x->props.family) {
1150                 err = -EAFNOSUPPORT;
1151                 goto out;
1152         }
1153         pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1], 
1154                                   &x->id.daddr);
1155
1156         if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1157                 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1158                 x->props.mode = sa2->sadb_x_sa2_mode;
1159                 if (x->props.mode)
1160                         x->props.mode--;
1161                 x->props.reqid = sa2->sadb_x_sa2_reqid;
1162         }
1163
1164         if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1165                 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1166
1167                 /* Nobody uses this, but we try. */
1168                 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1169                 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1170         }
1171
1172         if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1173                 struct sadb_x_nat_t_type* n_type;
1174                 struct xfrm_encap_tmpl *natt;
1175
1176                 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1177                 if (!x->encap)
1178                         goto out;
1179
1180                 natt = x->encap;
1181                 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1182                 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1183
1184                 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1185                         struct sadb_x_nat_t_port* n_port =
1186                                 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1187                         natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1188                 }
1189                 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1190                         struct sadb_x_nat_t_port* n_port =
1191                                 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1192                         natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1193                 }
1194         }
1195
1196         err = xfrm_init_state(x);
1197         if (err)
1198                 goto out;
1199
1200         x->km.seq = hdr->sadb_msg_seq;
1201         return x;
1202
1203 out:
1204         x->km.state = XFRM_STATE_DEAD;
1205         xfrm_state_put(x);
1206         return ERR_PTR(err);
1207 }
1208
1209 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1210 {
1211         return -EOPNOTSUPP;
1212 }
1213
1214 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1215 {
1216         struct sk_buff *resp_skb;
1217         struct sadb_x_sa2 *sa2;
1218         struct sadb_address *saddr, *daddr;
1219         struct sadb_msg *out_hdr;
1220         struct xfrm_state *x = NULL;
1221         u8 mode;
1222         u32 reqid;
1223         u8 proto;
1224         unsigned short family;
1225         xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1226
1227         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1228                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1229                 return -EINVAL;
1230
1231         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1232         if (proto == 0)
1233                 return -EINVAL;
1234
1235         if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1236                 mode = sa2->sadb_x_sa2_mode - 1;
1237                 reqid = sa2->sadb_x_sa2_reqid;
1238         } else {
1239                 mode = 0;
1240                 reqid = 0;
1241         }
1242
1243         saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1244         daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1245
1246         family = ((struct sockaddr *)(saddr + 1))->sa_family;
1247         switch (family) {
1248         case AF_INET:
1249                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1250                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1251                 break;
1252 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1253         case AF_INET6:
1254                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1255                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1256                 break;
1257 #endif
1258         }
1259
1260         if (hdr->sadb_msg_seq) {
1261                 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1262                 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1263                         xfrm_state_put(x);
1264                         x = NULL;
1265                 }
1266         }
1267
1268         if (!x)
1269                 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1270
1271         if (x == NULL)
1272                 return -ENOENT;
1273
1274         resp_skb = ERR_PTR(-ENOENT);
1275
1276         spin_lock_bh(&x->lock);
1277         if (x->km.state != XFRM_STATE_DEAD) {
1278                 struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1279                 u32 min_spi, max_spi;
1280
1281                 if (range != NULL) {
1282                         min_spi = range->sadb_spirange_min;
1283                         max_spi = range->sadb_spirange_max;
1284                 } else {
1285                         min_spi = 0x100;
1286                         max_spi = 0x0fffffff;
1287                 }
1288                 xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi));
1289                 if (x->id.spi)
1290                         resp_skb = pfkey_xfrm_state2msg(x, 0, 3);
1291         }
1292         spin_unlock_bh(&x->lock);
1293
1294         if (IS_ERR(resp_skb)) {
1295                 xfrm_state_put(x);
1296                 return  PTR_ERR(resp_skb);
1297         }
1298
1299         out_hdr = (struct sadb_msg *) resp_skb->data;
1300         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1301         out_hdr->sadb_msg_type = SADB_GETSPI;
1302         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1303         out_hdr->sadb_msg_errno = 0;
1304         out_hdr->sadb_msg_reserved = 0;
1305         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1306         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1307
1308         xfrm_state_put(x);
1309
1310         pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1311
1312         return 0;
1313 }
1314
1315 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1316 {
1317         struct xfrm_state *x;
1318
1319         if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1320                 return -EOPNOTSUPP;
1321
1322         if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1323                 return 0;
1324
1325         x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1326         if (x == NULL)
1327                 return 0;
1328
1329         spin_lock_bh(&x->lock);
1330         if (x->km.state == XFRM_STATE_ACQ) {
1331                 x->km.state = XFRM_STATE_ERROR;
1332                 wake_up(&km_waitq);
1333         }
1334         spin_unlock_bh(&x->lock);
1335         xfrm_state_put(x);
1336         return 0;
1337 }
1338
1339 static inline int event2poltype(int event)
1340 {
1341         switch (event) {
1342         case XFRM_MSG_DELPOLICY:
1343                 return SADB_X_SPDDELETE;
1344         case XFRM_MSG_NEWPOLICY:
1345                 return SADB_X_SPDADD;
1346         case XFRM_MSG_UPDPOLICY:
1347                 return SADB_X_SPDUPDATE;
1348         case XFRM_MSG_POLEXPIRE:
1349         //      return SADB_X_SPDEXPIRE;
1350         default:
1351                 printk("pfkey: Unknown policy event %d\n", event);
1352                 break;
1353         }
1354
1355         return 0;
1356 }
1357
1358 static inline int event2keytype(int event)
1359 {
1360         switch (event) {
1361         case XFRM_MSG_DELSA:
1362                 return SADB_DELETE;
1363         case XFRM_MSG_NEWSA:
1364                 return SADB_ADD;
1365         case XFRM_MSG_UPDSA:
1366                 return SADB_UPDATE;
1367         case XFRM_MSG_EXPIRE:
1368                 return SADB_EXPIRE;
1369         default:
1370                 printk("pfkey: Unknown SA event %d\n", event);
1371                 break;
1372         }
1373
1374         return 0;
1375 }
1376
1377 /* ADD/UPD/DEL */
1378 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1379 {
1380         struct sk_buff *skb;
1381         struct sadb_msg *hdr;
1382         int hsc = 3;
1383
1384         if (c->event == XFRM_MSG_DELSA)
1385                 hsc = 0;
1386
1387         skb = pfkey_xfrm_state2msg(x, 0, hsc);
1388
1389         if (IS_ERR(skb))
1390                 return PTR_ERR(skb);
1391
1392         hdr = (struct sadb_msg *) skb->data;
1393         hdr->sadb_msg_version = PF_KEY_V2;
1394         hdr->sadb_msg_type = event2keytype(c->event);
1395         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1396         hdr->sadb_msg_errno = 0;
1397         hdr->sadb_msg_reserved = 0;
1398         hdr->sadb_msg_seq = c->seq;
1399         hdr->sadb_msg_pid = c->pid;
1400
1401         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1402
1403         return 0;
1404 }
1405
1406 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1407 {
1408         struct xfrm_state *x;
1409         int err;
1410         struct km_event c;
1411
1412         xfrm_probe_algs();
1413         
1414         x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1415         if (IS_ERR(x))
1416                 return PTR_ERR(x);
1417
1418         xfrm_state_hold(x);
1419         if (hdr->sadb_msg_type == SADB_ADD)
1420                 err = xfrm_state_add(x);
1421         else
1422                 err = xfrm_state_update(x);
1423
1424         if (err < 0) {
1425                 x->km.state = XFRM_STATE_DEAD;
1426                 __xfrm_state_put(x);
1427                 goto out;
1428         }
1429
1430         if (hdr->sadb_msg_type == SADB_ADD)
1431                 c.event = XFRM_MSG_NEWSA;
1432         else
1433                 c.event = XFRM_MSG_UPDSA;
1434         c.seq = hdr->sadb_msg_seq;
1435         c.pid = hdr->sadb_msg_pid;
1436         km_state_notify(x, &c);
1437 out:
1438         xfrm_state_put(x);
1439         return err;
1440 }
1441
1442 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1443 {
1444         struct xfrm_state *x;
1445         struct km_event c;
1446         int err;
1447
1448         if (!ext_hdrs[SADB_EXT_SA-1] ||
1449             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1450                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1451                 return -EINVAL;
1452
1453         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1454         if (x == NULL)
1455                 return -ESRCH;
1456
1457         if ((err = security_xfrm_state_delete(x)))
1458                 goto out;
1459
1460         if (xfrm_state_kern(x)) {
1461                 err = -EPERM;
1462                 goto out;
1463         }
1464         
1465         err = xfrm_state_delete(x);
1466         if (err < 0)
1467                 goto out;
1468
1469         c.seq = hdr->sadb_msg_seq;
1470         c.pid = hdr->sadb_msg_pid;
1471         c.event = XFRM_MSG_DELSA;
1472         km_state_notify(x, &c);
1473 out:
1474         xfrm_state_put(x);
1475
1476         return err;
1477 }
1478
1479 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1480 {
1481         __u8 proto;
1482         struct sk_buff *out_skb;
1483         struct sadb_msg *out_hdr;
1484         struct xfrm_state *x;
1485
1486         if (!ext_hdrs[SADB_EXT_SA-1] ||
1487             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1488                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1489                 return -EINVAL;
1490
1491         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1492         if (x == NULL)
1493                 return -ESRCH;
1494
1495         out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1496         proto = x->id.proto;
1497         xfrm_state_put(x);
1498         if (IS_ERR(out_skb))
1499                 return  PTR_ERR(out_skb);
1500
1501         out_hdr = (struct sadb_msg *) out_skb->data;
1502         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1503         out_hdr->sadb_msg_type = SADB_DUMP;
1504         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1505         out_hdr->sadb_msg_errno = 0;
1506         out_hdr->sadb_msg_reserved = 0;
1507         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1508         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1509         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1510
1511         return 0;
1512 }
1513
1514 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1515                                               gfp_t allocation)
1516 {
1517         struct sk_buff *skb;
1518         struct sadb_msg *hdr;
1519         int len, auth_len, enc_len, i;
1520
1521         auth_len = xfrm_count_auth_supported();
1522         if (auth_len) {
1523                 auth_len *= sizeof(struct sadb_alg);
1524                 auth_len += sizeof(struct sadb_supported);
1525         }
1526         
1527         enc_len = xfrm_count_enc_supported();
1528         if (enc_len) {
1529                 enc_len *= sizeof(struct sadb_alg);
1530                 enc_len += sizeof(struct sadb_supported);
1531         }
1532         
1533         len = enc_len + auth_len + sizeof(struct sadb_msg);
1534
1535         skb = alloc_skb(len + 16, allocation);
1536         if (!skb)
1537                 goto out_put_algs;
1538
1539         hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1540         pfkey_hdr_dup(hdr, orig);
1541         hdr->sadb_msg_errno = 0;
1542         hdr->sadb_msg_len = len / sizeof(uint64_t);
1543
1544         if (auth_len) {
1545                 struct sadb_supported *sp;
1546                 struct sadb_alg *ap;
1547
1548                 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1549                 ap = (struct sadb_alg *) (sp + 1);
1550
1551                 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1552                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1553
1554                 for (i = 0; ; i++) {
1555                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1556                         if (!aalg)
1557                                 break;
1558                         if (aalg->available)
1559                                 *ap++ = aalg->desc;
1560                 }
1561         }
1562
1563         if (enc_len) {
1564                 struct sadb_supported *sp;
1565                 struct sadb_alg *ap;
1566
1567                 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1568                 ap = (struct sadb_alg *) (sp + 1);
1569
1570                 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1571                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1572
1573                 for (i = 0; ; i++) {
1574                         struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1575                         if (!ealg)
1576                                 break;
1577                         if (ealg->available)
1578                                 *ap++ = ealg->desc;
1579                 }
1580         }
1581
1582 out_put_algs:
1583         return skb;
1584 }
1585
1586 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1587 {
1588         struct pfkey_sock *pfk = pfkey_sk(sk);
1589         struct sk_buff *supp_skb;
1590
1591         if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1592                 return -EINVAL;
1593
1594         if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1595                 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1596                         return -EEXIST;
1597                 pfk->registered |= (1<<hdr->sadb_msg_satype);
1598         }
1599
1600         xfrm_probe_algs();
1601         
1602         supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1603         if (!supp_skb) {
1604                 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1605                         pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1606
1607                 return -ENOBUFS;
1608         }
1609
1610         pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1611
1612         return 0;
1613 }
1614
1615 static int key_notify_sa_flush(struct km_event *c)
1616 {
1617         struct sk_buff *skb;
1618         struct sadb_msg *hdr;
1619
1620         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1621         if (!skb)
1622                 return -ENOBUFS;
1623         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1624         hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1625         hdr->sadb_msg_type = SADB_FLUSH;
1626         hdr->sadb_msg_seq = c->seq;
1627         hdr->sadb_msg_pid = c->pid;
1628         hdr->sadb_msg_version = PF_KEY_V2;
1629         hdr->sadb_msg_errno = (uint8_t) 0;
1630         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1631
1632         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1633
1634         return 0;
1635 }
1636
1637 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1638 {
1639         unsigned proto;
1640         struct km_event c;
1641
1642         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1643         if (proto == 0)
1644                 return -EINVAL;
1645
1646         xfrm_state_flush(proto);
1647         c.data.proto = proto;
1648         c.seq = hdr->sadb_msg_seq;
1649         c.pid = hdr->sadb_msg_pid;
1650         c.event = XFRM_MSG_FLUSHSA;
1651         km_state_notify(NULL, &c);
1652
1653         return 0;
1654 }
1655
1656 struct pfkey_dump_data
1657 {
1658         struct sk_buff *skb;
1659         struct sadb_msg *hdr;
1660         struct sock *sk;
1661 };
1662
1663 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1664 {
1665         struct pfkey_dump_data *data = ptr;
1666         struct sk_buff *out_skb;
1667         struct sadb_msg *out_hdr;
1668
1669         out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1670         if (IS_ERR(out_skb))
1671                 return PTR_ERR(out_skb);
1672
1673         out_hdr = (struct sadb_msg *) out_skb->data;
1674         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1675         out_hdr->sadb_msg_type = SADB_DUMP;
1676         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1677         out_hdr->sadb_msg_errno = 0;
1678         out_hdr->sadb_msg_reserved = 0;
1679         out_hdr->sadb_msg_seq = count;
1680         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1681         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1682         return 0;
1683 }
1684
1685 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1686 {
1687         u8 proto;
1688         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1689
1690         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1691         if (proto == 0)
1692                 return -EINVAL;
1693
1694         return xfrm_state_walk(proto, dump_sa, &data);
1695 }
1696
1697 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1698 {
1699         struct pfkey_sock *pfk = pfkey_sk(sk);
1700         int satype = hdr->sadb_msg_satype;
1701
1702         if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1703                 /* XXX we mangle packet... */
1704                 hdr->sadb_msg_errno = 0;
1705                 if (satype != 0 && satype != 1)
1706                         return -EINVAL;
1707                 pfk->promisc = satype;
1708         }
1709         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1710         return 0;
1711 }
1712
1713 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1714 {
1715         int i;
1716         u32 reqid = *(u32*)ptr;
1717
1718         for (i=0; i<xp->xfrm_nr; i++) {
1719                 if (xp->xfrm_vec[i].reqid == reqid)
1720                         return -EEXIST;
1721         }
1722         return 0;
1723 }
1724
1725 static u32 gen_reqid(void)
1726 {
1727         u32 start;
1728         static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1729
1730         start = reqid;
1731         do {
1732                 ++reqid;
1733                 if (reqid == 0)
1734                         reqid = IPSEC_MANUAL_REQID_MAX+1;
1735                 if (xfrm_policy_walk(check_reqid, (void*)&reqid) != -EEXIST)
1736                         return reqid;
1737         } while (reqid != start);
1738         return 0;
1739 }
1740
1741 static int
1742 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1743 {
1744         struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1745         struct sockaddr_in *sin;
1746 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1747         struct sockaddr_in6 *sin6;
1748 #endif
1749
1750         if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1751                 return -ELOOP;
1752
1753         if (rq->sadb_x_ipsecrequest_mode == 0)
1754                 return -EINVAL;
1755
1756         t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1757         t->mode = rq->sadb_x_ipsecrequest_mode-1;
1758         if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1759                 t->optional = 1;
1760         else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1761                 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1762                 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1763                         t->reqid = 0;
1764                 if (!t->reqid && !(t->reqid = gen_reqid()))
1765                         return -ENOBUFS;
1766         }
1767
1768         /* addresses present only in tunnel mode */
1769         if (t->mode) {
1770                 switch (xp->family) {
1771                 case AF_INET:
1772                         sin = (void*)(rq+1);
1773                         if (sin->sin_family != AF_INET)
1774                                 return -EINVAL;
1775                         t->saddr.a4 = sin->sin_addr.s_addr;
1776                         sin++;
1777                         if (sin->sin_family != AF_INET)
1778                                 return -EINVAL;
1779                         t->id.daddr.a4 = sin->sin_addr.s_addr;
1780                         break;
1781 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1782                 case AF_INET6:
1783                         sin6 = (void *)(rq+1);
1784                         if (sin6->sin6_family != AF_INET6)
1785                                 return -EINVAL;
1786                         memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1787                         sin6++;
1788                         if (sin6->sin6_family != AF_INET6)
1789                                 return -EINVAL;
1790                         memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1791                         break;
1792 #endif
1793                 default:
1794                         return -EINVAL;
1795                 }
1796         }
1797         /* No way to set this via kame pfkey */
1798         t->aalgos = t->ealgos = t->calgos = ~0;
1799         xp->xfrm_nr++;
1800         return 0;
1801 }
1802
1803 static int
1804 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1805 {
1806         int err;
1807         int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1808         struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1809
1810         while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1811                 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1812                         return err;
1813                 len -= rq->sadb_x_ipsecrequest_len;
1814                 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1815         }
1816         return 0;
1817 }
1818
1819 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1820 {
1821   struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1822
1823         if (xfrm_ctx) {
1824                 int len = sizeof(struct sadb_x_sec_ctx);
1825                 len += xfrm_ctx->ctx_len;
1826                 return PFKEY_ALIGN8(len);
1827         }
1828         return 0;
1829 }
1830
1831 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1832 {
1833         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1834         int socklen = (xp->family == AF_INET ?
1835                        sizeof(struct sockaddr_in) :
1836                        sizeof(struct sockaddr_in6));
1837
1838         return sizeof(struct sadb_msg) +
1839                 (sizeof(struct sadb_lifetime) * 3) +
1840                 (sizeof(struct sadb_address) * 2) + 
1841                 (sockaddr_size * 2) +
1842                 sizeof(struct sadb_x_policy) +
1843                 (xp->xfrm_nr * (sizeof(struct sadb_x_ipsecrequest) +
1844                                 (socklen * 2))) +
1845                 pfkey_xfrm_policy2sec_ctx_size(xp);
1846 }
1847
1848 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1849 {
1850         struct sk_buff *skb;
1851         int size;
1852
1853         size = pfkey_xfrm_policy2msg_size(xp);
1854
1855         skb =  alloc_skb(size + 16, GFP_ATOMIC);
1856         if (skb == NULL)
1857                 return ERR_PTR(-ENOBUFS);
1858
1859         return skb;
1860 }
1861
1862 static void pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1863 {
1864         struct sadb_msg *hdr;
1865         struct sadb_address *addr;
1866         struct sadb_lifetime *lifetime;
1867         struct sadb_x_policy *pol;
1868         struct sockaddr_in   *sin;
1869         struct sadb_x_sec_ctx *sec_ctx;
1870         struct xfrm_sec_ctx *xfrm_ctx;
1871 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1872         struct sockaddr_in6  *sin6;
1873 #endif
1874         int i;
1875         int size;
1876         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1877         int socklen = (xp->family == AF_INET ?
1878                        sizeof(struct sockaddr_in) :
1879                        sizeof(struct sockaddr_in6));
1880
1881         size = pfkey_xfrm_policy2msg_size(xp);
1882
1883         /* call should fill header later */
1884         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1885         memset(hdr, 0, size);   /* XXX do we need this ? */
1886
1887         /* src address */
1888         addr = (struct sadb_address*) skb_put(skb, 
1889                                               sizeof(struct sadb_address)+sockaddr_size);
1890         addr->sadb_address_len = 
1891                 (sizeof(struct sadb_address)+sockaddr_size)/
1892                         sizeof(uint64_t);
1893         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1894         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1895         addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1896         addr->sadb_address_reserved = 0;
1897         /* src address */
1898         if (xp->family == AF_INET) {
1899                 sin = (struct sockaddr_in *) (addr + 1);
1900                 sin->sin_family = AF_INET;
1901                 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1902                 sin->sin_port = xp->selector.sport;
1903                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1904         }
1905 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1906         else if (xp->family == AF_INET6) {
1907                 sin6 = (struct sockaddr_in6 *) (addr + 1);
1908                 sin6->sin6_family = AF_INET6;
1909                 sin6->sin6_port = xp->selector.sport;
1910                 sin6->sin6_flowinfo = 0;
1911                 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1912                        sizeof(struct in6_addr));
1913                 sin6->sin6_scope_id = 0;
1914         }
1915 #endif
1916         else
1917                 BUG();
1918
1919         /* dst address */
1920         addr = (struct sadb_address*) skb_put(skb, 
1921                                               sizeof(struct sadb_address)+sockaddr_size);
1922         addr->sadb_address_len =
1923                 (sizeof(struct sadb_address)+sockaddr_size)/
1924                         sizeof(uint64_t);
1925         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1926         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1927         addr->sadb_address_prefixlen = xp->selector.prefixlen_d; 
1928         addr->sadb_address_reserved = 0;
1929         if (xp->family == AF_INET) {
1930                 sin = (struct sockaddr_in *) (addr + 1);
1931                 sin->sin_family = AF_INET;
1932                 sin->sin_addr.s_addr = xp->selector.daddr.a4;
1933                 sin->sin_port = xp->selector.dport;
1934                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1935         }
1936 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1937         else if (xp->family == AF_INET6) {
1938                 sin6 = (struct sockaddr_in6 *) (addr + 1);
1939                 sin6->sin6_family = AF_INET6;
1940                 sin6->sin6_port = xp->selector.dport;
1941                 sin6->sin6_flowinfo = 0;
1942                 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
1943                        sizeof(struct in6_addr));
1944                 sin6->sin6_scope_id = 0;
1945         }
1946 #endif
1947         else
1948                 BUG();
1949
1950         /* hard time */
1951         lifetime = (struct sadb_lifetime *)  skb_put(skb, 
1952                                                      sizeof(struct sadb_lifetime));
1953         lifetime->sadb_lifetime_len =
1954                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
1955         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
1956         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.hard_packet_limit);
1957         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
1958         lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
1959         lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
1960         /* soft time */
1961         lifetime = (struct sadb_lifetime *)  skb_put(skb, 
1962                                                      sizeof(struct sadb_lifetime));
1963         lifetime->sadb_lifetime_len =
1964                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
1965         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
1966         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.soft_packet_limit);
1967         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
1968         lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
1969         lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
1970         /* current time */
1971         lifetime = (struct sadb_lifetime *)  skb_put(skb, 
1972                                                      sizeof(struct sadb_lifetime));
1973         lifetime->sadb_lifetime_len =
1974                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
1975         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
1976         lifetime->sadb_lifetime_allocations = xp->curlft.packets;
1977         lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
1978         lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
1979         lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
1980
1981         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
1982         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
1983         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
1984         pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
1985         if (xp->action == XFRM_POLICY_ALLOW) {
1986                 if (xp->xfrm_nr)
1987                         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
1988                 else
1989                         pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
1990         }
1991         pol->sadb_x_policy_dir = dir+1;
1992         pol->sadb_x_policy_id = xp->index;
1993         pol->sadb_x_policy_priority = xp->priority;
1994
1995         for (i=0; i<xp->xfrm_nr; i++) {
1996                 struct sadb_x_ipsecrequest *rq;
1997                 struct xfrm_tmpl *t = xp->xfrm_vec + i;
1998                 int req_size;
1999
2000                 req_size = sizeof(struct sadb_x_ipsecrequest);
2001                 if (t->mode)
2002                         req_size += 2*socklen;
2003                 else
2004                         size -= 2*socklen;
2005                 rq = (void*)skb_put(skb, req_size);
2006                 pol->sadb_x_policy_len += req_size/8;
2007                 memset(rq, 0, sizeof(*rq));
2008                 rq->sadb_x_ipsecrequest_len = req_size;
2009                 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2010                 rq->sadb_x_ipsecrequest_mode = t->mode+1;
2011                 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2012                 if (t->reqid)
2013                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2014                 if (t->optional)
2015                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2016                 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2017                 if (t->mode) {
2018                         switch (xp->family) {
2019                         case AF_INET:
2020                                 sin = (void*)(rq+1);
2021                                 sin->sin_family = AF_INET;
2022                                 sin->sin_addr.s_addr = t->saddr.a4;
2023                                 sin->sin_port = 0;
2024                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2025                                 sin++;
2026                                 sin->sin_family = AF_INET;
2027                                 sin->sin_addr.s_addr = t->id.daddr.a4;
2028                                 sin->sin_port = 0;
2029                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2030                                 break;
2031 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2032                         case AF_INET6:
2033                                 sin6 = (void*)(rq+1);
2034                                 sin6->sin6_family = AF_INET6;
2035                                 sin6->sin6_port = 0;
2036                                 sin6->sin6_flowinfo = 0;
2037                                 memcpy(&sin6->sin6_addr, t->saddr.a6,
2038                                        sizeof(struct in6_addr));
2039                                 sin6->sin6_scope_id = 0;
2040
2041                                 sin6++;
2042                                 sin6->sin6_family = AF_INET6;
2043                                 sin6->sin6_port = 0;
2044                                 sin6->sin6_flowinfo = 0;
2045                                 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2046                                        sizeof(struct in6_addr));
2047                                 sin6->sin6_scope_id = 0;
2048                                 break;
2049 #endif
2050                         default:
2051                                 break;
2052                         }
2053                 }
2054         }
2055
2056         /* security context */
2057         if ((xfrm_ctx = xp->security)) {
2058                 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2059
2060                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2061                 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2062                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2063                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2064                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2065                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2066                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2067                        xfrm_ctx->ctx_len);
2068         }
2069
2070         hdr->sadb_msg_len = size / sizeof(uint64_t);
2071         hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2072 }
2073
2074 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2075 {
2076         struct sk_buff *out_skb;
2077         struct sadb_msg *out_hdr;
2078         int err;
2079
2080         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2081         if (IS_ERR(out_skb)) {
2082                 err = PTR_ERR(out_skb);
2083                 goto out;
2084         }
2085         pfkey_xfrm_policy2msg(out_skb, xp, dir);
2086
2087         out_hdr = (struct sadb_msg *) out_skb->data;
2088         out_hdr->sadb_msg_version = PF_KEY_V2;
2089
2090         if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2091                 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2092         else
2093                 out_hdr->sadb_msg_type = event2poltype(c->event);
2094         out_hdr->sadb_msg_errno = 0;
2095         out_hdr->sadb_msg_seq = c->seq;
2096         out_hdr->sadb_msg_pid = c->pid;
2097         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2098 out:
2099         return 0;
2100
2101 }
2102
2103 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2104 {
2105         int err = 0;
2106         struct sadb_lifetime *lifetime;
2107         struct sadb_address *sa;
2108         struct sadb_x_policy *pol;
2109         struct xfrm_policy *xp;
2110         struct km_event c;
2111         struct sadb_x_sec_ctx *sec_ctx;
2112
2113         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2114                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2115             !ext_hdrs[SADB_X_EXT_POLICY-1])
2116                 return -EINVAL;
2117
2118         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2119         if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2120                 return -EINVAL;
2121         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2122                 return -EINVAL;
2123
2124         xp = xfrm_policy_alloc(GFP_KERNEL);
2125         if (xp == NULL)
2126                 return -ENOBUFS;
2127
2128         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2129                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2130         xp->priority = pol->sadb_x_policy_priority;
2131
2132         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 
2133         xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2134         if (!xp->family) {
2135                 err = -EINVAL;
2136                 goto out;
2137         }
2138         xp->selector.family = xp->family;
2139         xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2140         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2141         xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2142         if (xp->selector.sport)
2143                 xp->selector.sport_mask = ~0;
2144
2145         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], 
2146         pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2147         xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2148
2149         /* Amusing, we set this twice.  KAME apps appear to set same value
2150          * in both addresses.
2151          */
2152         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2153
2154         xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2155         if (xp->selector.dport)
2156                 xp->selector.dport_mask = ~0;
2157
2158         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2159         if (sec_ctx != NULL) {
2160                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2161
2162                 if (!uctx) {
2163                         err = -ENOBUFS;
2164                         goto out;
2165                 }
2166
2167                 err = security_xfrm_policy_alloc(xp, uctx);
2168                 kfree(uctx);
2169
2170                 if (err)
2171                         goto out;
2172         }
2173
2174         xp->lft.soft_byte_limit = XFRM_INF;
2175         xp->lft.hard_byte_limit = XFRM_INF;
2176         xp->lft.soft_packet_limit = XFRM_INF;
2177         xp->lft.hard_packet_limit = XFRM_INF;
2178         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2179                 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2180                 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2181                 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2182                 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2183         }
2184         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2185                 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2186                 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2187                 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2188                 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2189         }
2190         xp->xfrm_nr = 0;
2191         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2192             (err = parse_ipsecrequests(xp, pol)) < 0)
2193                 goto out;
2194
2195         err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2196                                  hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2197
2198         if (err)
2199                 goto out;
2200
2201         if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2202                 c.event = XFRM_MSG_UPDPOLICY;
2203         else 
2204                 c.event = XFRM_MSG_NEWPOLICY;
2205
2206         c.seq = hdr->sadb_msg_seq;
2207         c.pid = hdr->sadb_msg_pid;
2208
2209         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2210         xfrm_pol_put(xp);
2211         return 0;
2212
2213 out:
2214         security_xfrm_policy_free(xp);
2215         kfree(xp);
2216         return err;
2217 }
2218
2219 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2220 {
2221         int err;
2222         struct sadb_address *sa;
2223         struct sadb_x_policy *pol;
2224         struct xfrm_policy *xp, tmp;
2225         struct xfrm_selector sel;
2226         struct km_event c;
2227         struct sadb_x_sec_ctx *sec_ctx;
2228
2229         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2230                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2231             !ext_hdrs[SADB_X_EXT_POLICY-1])
2232                 return -EINVAL;
2233
2234         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2235         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2236                 return -EINVAL;
2237
2238         memset(&sel, 0, sizeof(sel));
2239
2240         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 
2241         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2242         sel.prefixlen_s = sa->sadb_address_prefixlen;
2243         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2244         sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2245         if (sel.sport)
2246                 sel.sport_mask = ~0;
2247
2248         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], 
2249         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2250         sel.prefixlen_d = sa->sadb_address_prefixlen;
2251         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2252         sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2253         if (sel.dport)
2254                 sel.dport_mask = ~0;
2255
2256         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2257         memset(&tmp, 0, sizeof(struct xfrm_policy));
2258
2259         if (sec_ctx != NULL) {
2260                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2261
2262                 if (!uctx)
2263                         return -ENOMEM;
2264
2265                 err = security_xfrm_policy_alloc(&tmp, uctx);
2266                 kfree(uctx);
2267
2268                 if (err)
2269                         return err;
2270         }
2271
2272         xp = xfrm_policy_bysel_ctx(pol->sadb_x_policy_dir-1, &sel, tmp.security, 1);
2273         security_xfrm_policy_free(&tmp);
2274         if (xp == NULL)
2275                 return -ENOENT;
2276
2277         err = 0;
2278
2279         if ((err = security_xfrm_policy_delete(xp)))
2280                 goto out;
2281         c.seq = hdr->sadb_msg_seq;
2282         c.pid = hdr->sadb_msg_pid;
2283         c.event = XFRM_MSG_DELPOLICY;
2284         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2285
2286 out:
2287         xfrm_pol_put(xp);
2288         return err;
2289 }
2290
2291 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2292 {
2293         int err;
2294         struct sk_buff *out_skb;
2295         struct sadb_msg *out_hdr;
2296         err = 0;
2297
2298         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2299         if (IS_ERR(out_skb)) {
2300                 err =  PTR_ERR(out_skb);
2301                 goto out;
2302         }
2303         pfkey_xfrm_policy2msg(out_skb, xp, dir);
2304
2305         out_hdr = (struct sadb_msg *) out_skb->data;
2306         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2307         out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2308         out_hdr->sadb_msg_satype = 0;
2309         out_hdr->sadb_msg_errno = 0;
2310         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2311         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2312         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2313         err = 0;
2314
2315 out:
2316         return err;
2317 }
2318
2319 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2320 {
2321         unsigned int dir;
2322         int err;
2323         struct sadb_x_policy *pol;
2324         struct xfrm_policy *xp;
2325         struct km_event c;
2326
2327         if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2328                 return -EINVAL;
2329
2330         dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2331         if (dir >= XFRM_POLICY_MAX)
2332                 return -EINVAL;
2333
2334         xp = xfrm_policy_byid(dir, pol->sadb_x_policy_id,
2335                               hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2336         if (xp == NULL)
2337                 return -ENOENT;
2338
2339         err = 0;
2340
2341         c.seq = hdr->sadb_msg_seq;
2342         c.pid = hdr->sadb_msg_pid;
2343         if (hdr->sadb_msg_type == SADB_X_SPDDELETE2) {
2344                 c.data.byid = 1;
2345                 c.event = XFRM_MSG_DELPOLICY;
2346                 km_policy_notify(xp, dir, &c);
2347         } else {
2348                 err = key_pol_get_resp(sk, xp, hdr, dir);
2349         }
2350
2351         xfrm_pol_put(xp);
2352         return err;
2353 }
2354
2355 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2356 {
2357         struct pfkey_dump_data *data = ptr;
2358         struct sk_buff *out_skb;
2359         struct sadb_msg *out_hdr;
2360
2361         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2362         if (IS_ERR(out_skb))
2363                 return PTR_ERR(out_skb);
2364
2365         pfkey_xfrm_policy2msg(out_skb, xp, dir);
2366
2367         out_hdr = (struct sadb_msg *) out_skb->data;
2368         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2369         out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2370         out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2371         out_hdr->sadb_msg_errno = 0;
2372         out_hdr->sadb_msg_seq = count;
2373         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2374         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2375         return 0;
2376 }
2377
2378 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2379 {
2380         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2381
2382         return xfrm_policy_walk(dump_sp, &data);
2383 }
2384
2385 static int key_notify_policy_flush(struct km_event *c)
2386 {
2387         struct sk_buff *skb_out;
2388         struct sadb_msg *hdr;
2389
2390         skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2391         if (!skb_out)
2392                 return -ENOBUFS;
2393         hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2394         hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2395         hdr->sadb_msg_seq = c->seq;
2396         hdr->sadb_msg_pid = c->pid;
2397         hdr->sadb_msg_version = PF_KEY_V2;
2398         hdr->sadb_msg_errno = (uint8_t) 0;
2399         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2400         pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2401         return 0;
2402
2403 }
2404
2405 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2406 {
2407         struct km_event c;
2408
2409         xfrm_policy_flush();
2410         c.event = XFRM_MSG_FLUSHPOLICY;
2411         c.pid = hdr->sadb_msg_pid;
2412         c.seq = hdr->sadb_msg_seq;
2413         km_policy_notify(NULL, 0, &c);
2414
2415         return 0;
2416 }
2417
2418 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2419                              struct sadb_msg *hdr, void **ext_hdrs);
2420 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2421         [SADB_RESERVED]         = pfkey_reserved,
2422         [SADB_GETSPI]           = pfkey_getspi,
2423         [SADB_UPDATE]           = pfkey_add,
2424         [SADB_ADD]              = pfkey_add,
2425         [SADB_DELETE]           = pfkey_delete,
2426         [SADB_GET]              = pfkey_get,
2427         [SADB_ACQUIRE]          = pfkey_acquire,
2428         [SADB_REGISTER]         = pfkey_register,
2429         [SADB_EXPIRE]           = NULL,
2430         [SADB_FLUSH]            = pfkey_flush,
2431         [SADB_DUMP]             = pfkey_dump,
2432         [SADB_X_PROMISC]        = pfkey_promisc,
2433         [SADB_X_PCHANGE]        = NULL,
2434         [SADB_X_SPDUPDATE]      = pfkey_spdadd,
2435         [SADB_X_SPDADD]         = pfkey_spdadd,
2436         [SADB_X_SPDDELETE]      = pfkey_spddelete,
2437         [SADB_X_SPDGET]         = pfkey_spdget,
2438         [SADB_X_SPDACQUIRE]     = NULL,
2439         [SADB_X_SPDDUMP]        = pfkey_spddump,
2440         [SADB_X_SPDFLUSH]       = pfkey_spdflush,
2441         [SADB_X_SPDSETIDX]      = pfkey_spdadd,
2442         [SADB_X_SPDDELETE2]     = pfkey_spdget,
2443 };
2444
2445 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2446 {
2447         void *ext_hdrs[SADB_EXT_MAX];
2448         int err;
2449
2450         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2451                         BROADCAST_PROMISC_ONLY, NULL);
2452
2453         memset(ext_hdrs, 0, sizeof(ext_hdrs));
2454         err = parse_exthdrs(skb, hdr, ext_hdrs);
2455         if (!err) {
2456                 err = -EOPNOTSUPP;
2457                 if (pfkey_funcs[hdr->sadb_msg_type])
2458                         err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2459         }
2460         return err;
2461 }
2462
2463 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2464 {
2465         struct sadb_msg *hdr = NULL;
2466
2467         if (skb->len < sizeof(*hdr)) {
2468                 *errp = -EMSGSIZE;
2469         } else {
2470                 hdr = (struct sadb_msg *) skb->data;
2471                 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2472                     hdr->sadb_msg_reserved != 0 ||
2473                     (hdr->sadb_msg_type <= SADB_RESERVED ||
2474                      hdr->sadb_msg_type > SADB_MAX)) {
2475                         hdr = NULL;
2476                         *errp = -EINVAL;
2477                 } else if (hdr->sadb_msg_len != (skb->len /
2478                                                  sizeof(uint64_t)) ||
2479                            hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2480                                                 sizeof(uint64_t))) {
2481                         hdr = NULL;
2482                         *errp = -EMSGSIZE;
2483                 } else {
2484                         *errp = 0;
2485                 }
2486         }
2487         return hdr;
2488 }
2489
2490 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2491 {
2492         return t->aalgos & (1 << d->desc.sadb_alg_id);
2493 }
2494
2495 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2496 {
2497         return t->ealgos & (1 << d->desc.sadb_alg_id);
2498 }
2499
2500 static int count_ah_combs(struct xfrm_tmpl *t)
2501 {
2502         int i, sz = 0;
2503
2504         for (i = 0; ; i++) {
2505                 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2506                 if (!aalg)
2507                         break;
2508                 if (aalg_tmpl_set(t, aalg) && aalg->available)
2509                         sz += sizeof(struct sadb_comb);
2510         }
2511         return sz + sizeof(struct sadb_prop);
2512 }
2513
2514 static int count_esp_combs(struct xfrm_tmpl *t)
2515 {
2516         int i, k, sz = 0;
2517
2518         for (i = 0; ; i++) {
2519                 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2520                 if (!ealg)
2521                         break;
2522                         
2523                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2524                         continue;
2525                         
2526                 for (k = 1; ; k++) {
2527                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2528                         if (!aalg)
2529                                 break;
2530                                 
2531                         if (aalg_tmpl_set(t, aalg) && aalg->available)
2532                                 sz += sizeof(struct sadb_comb);
2533                 }
2534         }
2535         return sz + sizeof(struct sadb_prop);
2536 }
2537
2538 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2539 {
2540         struct sadb_prop *p;
2541         int i;
2542
2543         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2544         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2545         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2546         p->sadb_prop_replay = 32;
2547         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2548
2549         for (i = 0; ; i++) {
2550                 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2551                 if (!aalg)
2552                         break;
2553
2554                 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2555                         struct sadb_comb *c;
2556                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2557                         memset(c, 0, sizeof(*c));
2558                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2559                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2560                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2561                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2562                         c->sadb_comb_hard_addtime = 24*60*60;
2563                         c->sadb_comb_soft_addtime = 20*60*60;
2564                         c->sadb_comb_hard_usetime = 8*60*60;
2565                         c->sadb_comb_soft_usetime = 7*60*60;
2566                 }
2567         }
2568 }
2569
2570 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2571 {
2572         struct sadb_prop *p;
2573         int i, k;
2574
2575         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2576         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2577         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2578         p->sadb_prop_replay = 32;
2579         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2580
2581         for (i=0; ; i++) {
2582                 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2583                 if (!ealg)
2584                         break;
2585         
2586                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2587                         continue;
2588                         
2589                 for (k = 1; ; k++) {
2590                         struct sadb_comb *c;
2591                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2592                         if (!aalg)
2593                                 break;
2594                         if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2595                                 continue;
2596                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2597                         memset(c, 0, sizeof(*c));
2598                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2599                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2600                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2601                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2602                         c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2603                         c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2604                         c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2605                         c->sadb_comb_hard_addtime = 24*60*60;
2606                         c->sadb_comb_soft_addtime = 20*60*60;
2607                         c->sadb_comb_hard_usetime = 8*60*60;
2608                         c->sadb_comb_soft_usetime = 7*60*60;
2609                 }
2610         }
2611 }
2612
2613 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2614 {
2615         return 0;
2616 }
2617
2618 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2619 {
2620         struct sk_buff *out_skb;
2621         struct sadb_msg *out_hdr;
2622         int hard;
2623         int hsc;
2624
2625         hard = c->data.hard;
2626         if (hard)
2627                 hsc = 2;
2628         else
2629                 hsc = 1;
2630
2631         out_skb = pfkey_xfrm_state2msg(x, 0, hsc);
2632         if (IS_ERR(out_skb))
2633                 return PTR_ERR(out_skb);
2634
2635         out_hdr = (struct sadb_msg *) out_skb->data;
2636         out_hdr->sadb_msg_version = PF_KEY_V2;
2637         out_hdr->sadb_msg_type = SADB_EXPIRE;
2638         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2639         out_hdr->sadb_msg_errno = 0;
2640         out_hdr->sadb_msg_reserved = 0;
2641         out_hdr->sadb_msg_seq = 0;
2642         out_hdr->sadb_msg_pid = 0;
2643
2644         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2645         return 0;
2646 }
2647
2648 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2649 {
2650         switch (c->event) {
2651         case XFRM_MSG_EXPIRE:
2652                 return key_notify_sa_expire(x, c);
2653         case XFRM_MSG_DELSA:
2654         case XFRM_MSG_NEWSA:
2655         case XFRM_MSG_UPDSA:
2656                 return key_notify_sa(x, c);
2657         case XFRM_MSG_FLUSHSA:
2658                 return key_notify_sa_flush(c);
2659         case XFRM_MSG_NEWAE: /* not yet supported */
2660                 break;
2661         default:
2662                 printk("pfkey: Unknown SA event %d\n", c->event);
2663                 break;
2664         }
2665
2666         return 0;
2667 }
2668
2669 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2670 {
2671         switch (c->event) {
2672         case XFRM_MSG_POLEXPIRE:
2673                 return key_notify_policy_expire(xp, c);
2674         case XFRM_MSG_DELPOLICY:
2675         case XFRM_MSG_NEWPOLICY:
2676         case XFRM_MSG_UPDPOLICY:
2677                 return key_notify_policy(xp, dir, c);
2678         case XFRM_MSG_FLUSHPOLICY:
2679                 return key_notify_policy_flush(c);
2680         default:
2681                 printk("pfkey: Unknown policy event %d\n", c->event);
2682                 break;
2683         }
2684
2685         return 0;
2686 }
2687
2688 static u32 get_acqseq(void)
2689 {
2690         u32 res;
2691         static u32 acqseq;
2692         static DEFINE_SPINLOCK(acqseq_lock);
2693
2694         spin_lock_bh(&acqseq_lock);
2695         res = (++acqseq ? : ++acqseq);
2696         spin_unlock_bh(&acqseq_lock);
2697         return res;
2698 }
2699
2700 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
2701 {
2702         struct sk_buff *skb;
2703         struct sadb_msg *hdr;
2704         struct sadb_address *addr;
2705         struct sadb_x_policy *pol;
2706         struct sockaddr_in *sin;
2707 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2708         struct sockaddr_in6 *sin6;
2709 #endif
2710         int sockaddr_size;
2711         int size;
2712         
2713         sockaddr_size = pfkey_sockaddr_size(x->props.family);
2714         if (!sockaddr_size)
2715                 return -EINVAL;
2716
2717         size = sizeof(struct sadb_msg) +
2718                 (sizeof(struct sadb_address) * 2) +
2719                 (sockaddr_size * 2) +
2720                 sizeof(struct sadb_x_policy);
2721         
2722         if (x->id.proto == IPPROTO_AH)
2723                 size += count_ah_combs(t);
2724         else if (x->id.proto == IPPROTO_ESP)
2725                 size += count_esp_combs(t);
2726
2727         skb =  alloc_skb(size + 16, GFP_ATOMIC);
2728         if (skb == NULL)
2729                 return -ENOMEM;
2730         
2731         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2732         hdr->sadb_msg_version = PF_KEY_V2;
2733         hdr->sadb_msg_type = SADB_ACQUIRE;
2734         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2735         hdr->sadb_msg_len = size / sizeof(uint64_t);
2736         hdr->sadb_msg_errno = 0;
2737         hdr->sadb_msg_reserved = 0;
2738         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
2739         hdr->sadb_msg_pid = 0;
2740
2741         /* src address */
2742         addr = (struct sadb_address*) skb_put(skb, 
2743                                               sizeof(struct sadb_address)+sockaddr_size);
2744         addr->sadb_address_len = 
2745                 (sizeof(struct sadb_address)+sockaddr_size)/
2746                         sizeof(uint64_t);
2747         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2748         addr->sadb_address_proto = 0;
2749         addr->sadb_address_reserved = 0;
2750         if (x->props.family == AF_INET) {
2751                 addr->sadb_address_prefixlen = 32;
2752
2753                 sin = (struct sockaddr_in *) (addr + 1);
2754                 sin->sin_family = AF_INET;
2755                 sin->sin_addr.s_addr = x->props.saddr.a4;
2756                 sin->sin_port = 0;
2757                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2758         }
2759 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2760         else if (x->props.family == AF_INET6) {
2761                 addr->sadb_address_prefixlen = 128;
2762
2763                 sin6 = (struct sockaddr_in6 *) (addr + 1);
2764                 sin6->sin6_family = AF_INET6;
2765                 sin6->sin6_port = 0;
2766                 sin6->sin6_flowinfo = 0;
2767                 memcpy(&sin6->sin6_addr,
2768                        x->props.saddr.a6, sizeof(struct in6_addr));
2769                 sin6->sin6_scope_id = 0;
2770         }
2771 #endif
2772         else
2773                 BUG();
2774         
2775         /* dst address */
2776         addr = (struct sadb_address*) skb_put(skb, 
2777                                               sizeof(struct sadb_address)+sockaddr_size);
2778         addr->sadb_address_len =
2779                 (sizeof(struct sadb_address)+sockaddr_size)/
2780                         sizeof(uint64_t);
2781         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2782         addr->sadb_address_proto = 0;
2783         addr->sadb_address_reserved = 0;
2784         if (x->props.family == AF_INET) {
2785                 addr->sadb_address_prefixlen = 32; 
2786
2787                 sin = (struct sockaddr_in *) (addr + 1);
2788                 sin->sin_family = AF_INET;
2789                 sin->sin_addr.s_addr = x->id.daddr.a4;
2790                 sin->sin_port = 0;
2791                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2792         }
2793 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2794         else if (x->props.family == AF_INET6) {
2795                 addr->sadb_address_prefixlen = 128; 
2796
2797                 sin6 = (struct sockaddr_in6 *) (addr + 1);
2798                 sin6->sin6_family = AF_INET6;
2799                 sin6->sin6_port = 0;
2800                 sin6->sin6_flowinfo = 0;
2801                 memcpy(&sin6->sin6_addr,
2802                        x->id.daddr.a6, sizeof(struct in6_addr));
2803                 sin6->sin6_scope_id = 0;
2804         }
2805 #endif
2806         else
2807                 BUG();
2808
2809         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
2810         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2811         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2812         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2813         pol->sadb_x_policy_dir = dir+1;
2814         pol->sadb_x_policy_id = xp->index;
2815
2816         /* Set sadb_comb's. */
2817         if (x->id.proto == IPPROTO_AH)
2818                 dump_ah_combs(skb, t);
2819         else if (x->id.proto == IPPROTO_ESP)
2820                 dump_esp_combs(skb, t);
2821
2822         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2823 }
2824
2825 static struct xfrm_policy *pfkey_compile_policy(u16 family, int opt,
2826                                                 u8 *data, int len, int *dir)
2827 {
2828         struct xfrm_policy *xp;
2829         struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
2830         struct sadb_x_sec_ctx *sec_ctx;
2831
2832         switch (family) {
2833         case AF_INET:
2834                 if (opt != IP_IPSEC_POLICY) {
2835                         *dir = -EOPNOTSUPP;
2836                         return NULL;
2837                 }
2838                 break;
2839 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2840         case AF_INET6:
2841                 if (opt != IPV6_IPSEC_POLICY) {
2842                         *dir = -EOPNOTSUPP;
2843                         return NULL;
2844                 }
2845                 break;
2846 #endif
2847         default:
2848                 *dir = -EINVAL;
2849                 return NULL;
2850         }
2851
2852         *dir = -EINVAL;
2853
2854         if (len < sizeof(struct sadb_x_policy) ||
2855             pol->sadb_x_policy_len*8 > len ||
2856             pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
2857             (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
2858                 return NULL;
2859
2860         xp = xfrm_policy_alloc(GFP_ATOMIC);
2861         if (xp == NULL) {
2862                 *dir = -ENOBUFS;
2863                 return NULL;
2864         }
2865
2866         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2867                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2868
2869         xp->lft.soft_byte_limit = XFRM_INF;
2870         xp->lft.hard_byte_limit = XFRM_INF;
2871         xp->lft.soft_packet_limit = XFRM_INF;
2872         xp->lft.hard_packet_limit = XFRM_INF;
2873         xp->family = family;
2874
2875         xp->xfrm_nr = 0;
2876         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2877             (*dir = parse_ipsecrequests(xp, pol)) < 0)
2878                 goto out;
2879
2880         /* security context too */
2881         if (len >= (pol->sadb_x_policy_len*8 +
2882             sizeof(struct sadb_x_sec_ctx))) {
2883                 char *p = (char *)pol;
2884                 struct xfrm_user_sec_ctx *uctx;
2885
2886                 p += pol->sadb_x_policy_len*8;
2887                 sec_ctx = (struct sadb_x_sec_ctx *)p;
2888                 if (len < pol->sadb_x_policy_len*8 +
2889                     sec_ctx->sadb_x_sec_len)
2890                         goto out;
2891                 if ((*dir = verify_sec_ctx_len(p)))
2892                         goto out;
2893                 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2894                 *dir = security_xfrm_policy_alloc(xp, uctx);
2895                 kfree(uctx);
2896
2897                 if (*dir)
2898                         goto out;
2899         }
2900
2901         *dir = pol->sadb_x_policy_dir-1;
2902         return xp;
2903
2904 out:
2905         security_xfrm_policy_free(xp);
2906         kfree(xp);
2907         return NULL;
2908 }
2909
2910 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport)
2911 {
2912         struct sk_buff *skb;
2913         struct sadb_msg *hdr;
2914         struct sadb_sa *sa;
2915         struct sadb_address *addr;
2916         struct sadb_x_nat_t_port *n_port;
2917         struct sockaddr_in *sin;
2918 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2919         struct sockaddr_in6 *sin6;
2920 #endif
2921         int sockaddr_size;
2922         int size;
2923         __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
2924         struct xfrm_encap_tmpl *natt = NULL;
2925
2926         sockaddr_size = pfkey_sockaddr_size(x->props.family);
2927         if (!sockaddr_size)
2928                 return -EINVAL;
2929
2930         if (!satype)
2931                 return -EINVAL;
2932
2933         if (!x->encap)
2934                 return -EINVAL;
2935
2936         natt = x->encap;
2937
2938         /* Build an SADB_X_NAT_T_NEW_MAPPING message:
2939          *
2940          * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
2941          * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
2942          */
2943         
2944         size = sizeof(struct sadb_msg) +
2945                 sizeof(struct sadb_sa) +
2946                 (sizeof(struct sadb_address) * 2) +
2947                 (sockaddr_size * 2) +
2948                 (sizeof(struct sadb_x_nat_t_port) * 2);
2949         
2950         skb =  alloc_skb(size + 16, GFP_ATOMIC);
2951         if (skb == NULL)
2952                 return -ENOMEM;
2953         
2954         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2955         hdr->sadb_msg_version = PF_KEY_V2;
2956         hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
2957         hdr->sadb_msg_satype = satype;
2958         hdr->sadb_msg_len = size / sizeof(uint64_t);
2959         hdr->sadb_msg_errno = 0;
2960         hdr->sadb_msg_reserved = 0;
2961         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
2962         hdr->sadb_msg_pid = 0;
2963
2964         /* SA */
2965         sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
2966         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
2967         sa->sadb_sa_exttype = SADB_EXT_SA;
2968         sa->sadb_sa_spi = x->id.spi;
2969         sa->sadb_sa_replay = 0;
2970         sa->sadb_sa_state = 0;
2971         sa->sadb_sa_auth = 0;
2972         sa->sadb_sa_encrypt = 0;
2973         sa->sadb_sa_flags = 0;
2974
2975         /* ADDRESS_SRC (old addr) */
2976         addr = (struct sadb_address*)
2977                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
2978         addr->sadb_address_len = 
2979                 (sizeof(struct sadb_address)+sockaddr_size)/
2980                         sizeof(uint64_t);
2981         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2982         addr->sadb_address_proto = 0;
2983         addr->sadb_address_reserved = 0;
2984         if (x->props.family == AF_INET) {
2985                 addr->sadb_address_prefixlen = 32;
2986
2987                 sin = (struct sockaddr_in *) (addr + 1);
2988                 sin->sin_family = AF_INET;
2989                 sin->sin_addr.s_addr = x->props.saddr.a4;
2990                 sin->sin_port = 0;
2991                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2992         }
2993 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2994         else if (x->props.family == AF_INET6) {
2995                 addr->sadb_address_prefixlen = 128;
2996
2997                 sin6 = (struct sockaddr_in6 *) (addr + 1);
2998                 sin6->sin6_family = AF_INET6;
2999                 sin6->sin6_port = 0;
3000                 sin6->sin6_flowinfo = 0;
3001                 memcpy(&sin6->sin6_addr,
3002                        x->props.saddr.a6, sizeof(struct in6_addr));
3003                 sin6->sin6_scope_id = 0;
3004         }
3005 #endif
3006         else
3007                 BUG();
3008
3009         /* NAT_T_SPORT (old port) */
3010         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3011         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3012         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3013         n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3014         n_port->sadb_x_nat_t_port_reserved = 0;
3015
3016         /* ADDRESS_DST (new addr) */
3017         addr = (struct sadb_address*)
3018                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3019         addr->sadb_address_len = 
3020                 (sizeof(struct sadb_address)+sockaddr_size)/
3021                         sizeof(uint64_t);
3022         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3023         addr->sadb_address_proto = 0;
3024         addr->sadb_address_reserved = 0;
3025         if (x->props.family == AF_INET) {
3026                 addr->sadb_address_prefixlen = 32;
3027
3028                 sin = (struct sockaddr_in *) (addr + 1);
3029                 sin->sin_family = AF_INET;
3030                 sin->sin_addr.s_addr = ipaddr->a4;
3031                 sin->sin_port = 0;
3032                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3033         }
3034 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3035         else if (x->props.family == AF_INET6) {
3036                 addr->sadb_address_prefixlen = 128;
3037
3038                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3039                 sin6->sin6_family = AF_INET6;
3040                 sin6->sin6_port = 0;
3041                 sin6->sin6_flowinfo = 0;
3042                 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3043                 sin6->sin6_scope_id = 0;
3044         }
3045 #endif
3046         else
3047                 BUG();
3048
3049         /* NAT_T_DPORT (new port) */
3050         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3051         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3052         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3053         n_port->sadb_x_nat_t_port_port = sport;
3054         n_port->sadb_x_nat_t_port_reserved = 0;
3055
3056         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3057 }
3058
3059 static int pfkey_sendmsg(struct kiocb *kiocb,
3060                          struct socket *sock, struct msghdr *msg, size_t len)
3061 {
3062         struct sock *sk = sock->sk;
3063         struct sk_buff *skb = NULL;
3064         struct sadb_msg *hdr = NULL;
3065         int err;
3066
3067         err = -EOPNOTSUPP;
3068         if (msg->msg_flags & MSG_OOB)
3069                 goto out;
3070
3071         err = -EMSGSIZE;
3072         if ((unsigned)len > sk->sk_sndbuf - 32)
3073                 goto out;
3074
3075         err = -ENOBUFS;
3076         skb = alloc_skb(len, GFP_KERNEL);
3077         if (skb == NULL)
3078                 goto out;
3079
3080         err = -EFAULT;
3081         if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3082                 goto out;
3083
3084         hdr = pfkey_get_base_msg(skb, &err);
3085         if (!hdr)
3086                 goto out;
3087
3088         mutex_lock(&xfrm_cfg_mutex);
3089         err = pfkey_process(sk, skb, hdr);
3090         mutex_unlock(&xfrm_cfg_mutex);
3091
3092 out:
3093         if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3094                 err = 0;
3095         if (skb)
3096                 kfree_skb(skb);
3097
3098         return err ? : len;
3099 }
3100
3101 static int pfkey_recvmsg(struct kiocb *kiocb,
3102                          struct socket *sock, struct msghdr *msg, size_t len,
3103                          int flags)
3104 {
3105         struct sock *sk = sock->sk;
3106         struct sk_buff *skb;
3107         int copied, err;
3108
3109         err = -EINVAL;
3110         if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3111                 goto out;
3112
3113         msg->msg_namelen = 0;
3114         skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3115         if (skb == NULL)
3116                 goto out;
3117
3118         copied = skb->len;
3119         if (copied > len) {
3120                 msg->msg_flags |= MSG_TRUNC;
3121                 copied = len;
3122         }
3123
3124         skb->h.raw = skb->data;
3125         err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3126         if (err)
3127                 goto out_free;
3128
3129         sock_recv_timestamp(msg, sk, skb);
3130
3131         err = (flags & MSG_TRUNC) ? skb->len : copied;
3132
3133 out_free:
3134         skb_free_datagram(sk, skb);
3135 out:
3136         return err;
3137 }
3138
3139 static const struct proto_ops pfkey_ops = {
3140         .family         =       PF_KEY,
3141         .owner          =       THIS_MODULE,
3142         /* Operations that make no sense on pfkey sockets. */
3143         .bind           =       sock_no_bind,
3144         .connect        =       sock_no_connect,
3145         .socketpair     =       sock_no_socketpair,
3146         .accept         =       sock_no_accept,
3147         .getname        =       sock_no_getname,
3148         .ioctl          =       sock_no_ioctl,
3149         .listen         =       sock_no_listen,
3150         .shutdown       =       sock_no_shutdown,
3151         .setsockopt     =       sock_no_setsockopt,
3152         .getsockopt     =       sock_no_getsockopt,
3153         .mmap           =       sock_no_mmap,
3154         .sendpage       =       sock_no_sendpage,
3155
3156         /* Now the operations that really occur. */
3157         .release        =       pfkey_release,
3158         .poll           =       datagram_poll,
3159         .sendmsg        =       pfkey_sendmsg,
3160         .recvmsg        =       pfkey_recvmsg,
3161 };
3162
3163 static struct net_proto_family pfkey_family_ops = {
3164         .family =       PF_KEY,
3165         .create =       pfkey_create,
3166         .owner  =       THIS_MODULE,
3167 };
3168
3169 #ifdef CONFIG_PROC_FS
3170 static int pfkey_read_proc(char *buffer, char **start, off_t offset,
3171                            int length, int *eof, void *data)
3172 {
3173         off_t pos = 0;
3174         off_t begin = 0;
3175         int len = 0;
3176         struct sock *s;
3177         struct hlist_node *node;
3178
3179         len += sprintf(buffer,"sk       RefCnt Rmem   Wmem   User   Inode\n");
3180
3181         read_lock(&pfkey_table_lock);
3182
3183         sk_for_each(s, node, &pfkey_table) {
3184                 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
3185                                s,
3186                                atomic_read(&s->sk_refcnt),
3187                                atomic_read(&s->sk_rmem_alloc),
3188                                atomic_read(&s->sk_wmem_alloc),
3189                                sock_i_uid(s),
3190                                sock_i_ino(s)
3191                                );
3192
3193                 buffer[len++] = '\n';
3194                 
3195                 pos = begin + len;
3196                 if (pos < offset) {
3197                         len = 0;
3198                         begin = pos;
3199                 }
3200                 if(pos > offset + length)
3201                         goto done;
3202         }
3203         *eof = 1;
3204
3205 done:
3206         read_unlock(&pfkey_table_lock);
3207
3208         *start = buffer + (offset - begin);
3209         len -= (offset - begin);
3210
3211         if (len > length)
3212                 len = length;
3213         if (len < 0)
3214                 len = 0;
3215
3216         return len;
3217 }
3218 #endif
3219
3220 static struct xfrm_mgr pfkeyv2_mgr =
3221 {
3222         .id             = "pfkeyv2",
3223         .notify         = pfkey_send_notify,
3224         .acquire        = pfkey_send_acquire,
3225         .compile_policy = pfkey_compile_policy,
3226         .new_mapping    = pfkey_send_new_mapping,
3227         .notify_policy  = pfkey_send_policy_notify,
3228 };
3229
3230 static void __exit ipsec_pfkey_exit(void)
3231 {
3232         xfrm_unregister_km(&pfkeyv2_mgr);
3233         remove_proc_entry("net/pfkey", NULL);
3234         sock_unregister(PF_KEY);
3235         proto_unregister(&key_proto);
3236 }
3237
3238 static int __init ipsec_pfkey_init(void)
3239 {
3240         int err = proto_register(&key_proto, 0);
3241
3242         if (err != 0)
3243                 goto out;
3244
3245         err = sock_register(&pfkey_family_ops);
3246         if (err != 0)
3247                 goto out_unregister_key_proto;
3248 #ifdef CONFIG_PROC_FS
3249         err = -ENOMEM;
3250         if (create_proc_read_entry("net/pfkey", 0, NULL, pfkey_read_proc, NULL) == NULL)
3251                 goto out_sock_unregister;
3252 #endif
3253         err = xfrm_register_km(&pfkeyv2_mgr);
3254         if (err != 0)
3255                 goto out_remove_proc_entry;
3256 out:
3257         return err;
3258 out_remove_proc_entry:
3259 #ifdef CONFIG_PROC_FS
3260         remove_proc_entry("net/pfkey", NULL);
3261 out_sock_unregister:
3262 #endif
3263         sock_unregister(PF_KEY);
3264 out_unregister_key_proto:
3265         proto_unregister(&key_proto);
3266         goto out;
3267 }
3268
3269 module_init(ipsec_pfkey_init);
3270 module_exit(ipsec_pfkey_exit);
3271 MODULE_LICENSE("GPL");
3272 MODULE_ALIAS_NETPROTO(PF_KEY);