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Merge tag 'v3.10.108' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / key / af_key.c
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1/*
2 * net/key/af_key.c An implementation of PF_KEYv2 sockets.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Maxim Giryaev <gem@asplinux.ru>
10 * David S. Miller <davem@redhat.com>
11 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
12 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
14 * Derek Atkins <derek@ihtfp.com>
15 */
16
17#include <linux/capability.h>
18#include <linux/module.h>
19#include <linux/kernel.h>
20#include <linux/socket.h>
21#include <linux/pfkeyv2.h>
22#include <linux/ipsec.h>
23#include <linux/skbuff.h>
24#include <linux/rtnetlink.h>
25#include <linux/in.h>
26#include <linux/in6.h>
27#include <linux/proc_fs.h>
28#include <linux/init.h>
29#include <linux/slab.h>
30#include <net/net_namespace.h>
31#include <net/netns/generic.h>
32#include <net/xfrm.h>
33
34#include <net/sock.h>
35
36#define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
37#define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
38
39static int pfkey_net_id __read_mostly;
40struct netns_pfkey {
41 /* List of all pfkey sockets. */
42 struct hlist_head table;
43 atomic_t socks_nr;
44};
45static DEFINE_MUTEX(pfkey_mutex);
46
47#define DUMMY_MARK 0
48static struct xfrm_mark dummy_mark = {0, 0};
49struct pfkey_sock {
50 /* struct sock must be the first member of struct pfkey_sock */
51 struct sock sk;
52 int registered;
53 int promisc;
54
55 struct {
56 uint8_t msg_version;
57 uint32_t msg_portid;
58 int (*dump)(struct pfkey_sock *sk);
59 void (*done)(struct pfkey_sock *sk);
60 union {
61 struct xfrm_policy_walk policy;
62 struct xfrm_state_walk state;
63 } u;
64 struct sk_buff *skb;
65 } dump;
66};
67
68static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
69{
70 return (struct pfkey_sock *)sk;
71}
72
73static int pfkey_can_dump(const struct sock *sk)
74{
75 if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
76 return 1;
77 return 0;
78}
79
80static void pfkey_terminate_dump(struct pfkey_sock *pfk)
81{
82 if (pfk->dump.dump) {
83 if (pfk->dump.skb) {
84 kfree_skb(pfk->dump.skb);
85 pfk->dump.skb = NULL;
86 }
87 pfk->dump.done(pfk);
88 pfk->dump.dump = NULL;
89 pfk->dump.done = NULL;
90 }
91}
92
93static void pfkey_sock_destruct(struct sock *sk)
94{
95 struct net *net = sock_net(sk);
96 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
97
98 pfkey_terminate_dump(pfkey_sk(sk));
99 skb_queue_purge(&sk->sk_receive_queue);
100
101 if (!sock_flag(sk, SOCK_DEAD)) {
102 pr_err("Attempt to release alive pfkey socket: %p\n", sk);
103 return;
104 }
105
106 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
107 WARN_ON(atomic_read(&sk->sk_wmem_alloc));
108
109 atomic_dec(&net_pfkey->socks_nr);
110}
111
112static const struct proto_ops pfkey_ops;
113
114static void pfkey_insert(struct sock *sk)
115{
116 struct net *net = sock_net(sk);
117 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
118
119 mutex_lock(&pfkey_mutex);
120 sk_add_node_rcu(sk, &net_pfkey->table);
121 mutex_unlock(&pfkey_mutex);
122}
123
124static void pfkey_remove(struct sock *sk)
125{
126 mutex_lock(&pfkey_mutex);
127 sk_del_node_init_rcu(sk);
128 mutex_unlock(&pfkey_mutex);
129}
130
131static struct proto key_proto = {
132 .name = "KEY",
133 .owner = THIS_MODULE,
134 .obj_size = sizeof(struct pfkey_sock),
135};
136
137static int pfkey_create(struct net *net, struct socket *sock, int protocol,
138 int kern)
139{
140 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
141 struct sock *sk;
142 int err;
143
144 if (!ns_capable(net->user_ns, 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(net, PF_KEY, GFP_KERNEL, &key_proto);
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(&net_pfkey->socks_nr);
163
164 pfkey_insert(sk);
165
166 return 0;
167out:
168 return err;
169}
170
171static 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
184 synchronize_rcu();
185 sock_put(sk);
186
187 return 0;
188}
189
190static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
191 gfp_t allocation, struct sock *sk)
192{
193 int err = -ENOBUFS;
194
195 sock_hold(sk);
196 if (*skb2 == NULL) {
197 if (atomic_read(&skb->users) != 1) {
198 *skb2 = skb_clone(skb, allocation);
199 } else {
200 *skb2 = skb;
201 atomic_inc(&skb->users);
202 }
203 }
204 if (*skb2 != NULL) {
205 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
206 skb_set_owner_r(*skb2, sk);
207 skb_queue_tail(&sk->sk_receive_queue, *skb2);
208 sk->sk_data_ready(sk, (*skb2)->len);
209 *skb2 = NULL;
210 err = 0;
211 }
212 }
213 sock_put(sk);
214 return err;
215}
216
217/* Send SKB to all pfkey sockets matching selected criteria. */
218#define BROADCAST_ALL 0
219#define BROADCAST_ONE 1
220#define BROADCAST_REGISTERED 2
221#define BROADCAST_PROMISC_ONLY 4
222static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
223 int broadcast_flags, struct sock *one_sk,
224 struct net *net)
225{
226 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
227 struct sock *sk;
228 struct sk_buff *skb2 = NULL;
229 int err = -ESRCH;
230
231 /* XXX Do we need something like netlink_overrun? I think
232 * XXX PF_KEY socket apps will not mind current behavior.
233 */
234 if (!skb)
235 return -ENOMEM;
236
237 rcu_read_lock();
238 sk_for_each_rcu(sk, &net_pfkey->table) {
239 struct pfkey_sock *pfk = pfkey_sk(sk);
240 int err2;
241
242 /* Yes, it means that if you are meant to receive this
243 * pfkey message you receive it twice as promiscuous
244 * socket.
245 */
246 if (pfk->promisc)
247 pfkey_broadcast_one(skb, &skb2, allocation, sk);
248
249 /* the exact target will be processed later */
250 if (sk == one_sk)
251 continue;
252 if (broadcast_flags != BROADCAST_ALL) {
253 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
254 continue;
255 if ((broadcast_flags & BROADCAST_REGISTERED) &&
256 !pfk->registered)
257 continue;
258 if (broadcast_flags & BROADCAST_ONE)
259 continue;
260 }
261
262 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
263
264 /* Error is cleare after succecful sending to at least one
265 * registered KM */
266 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
267 err = err2;
268 }
269 rcu_read_unlock();
270
271 if (one_sk != NULL)
272 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
273
274 kfree_skb(skb2);
275 kfree_skb(skb);
276 return err;
277}
278
279static int pfkey_do_dump(struct pfkey_sock *pfk)
280{
281 struct sadb_msg *hdr;
282 int rc;
283
284 rc = pfk->dump.dump(pfk);
285 if (rc == -ENOBUFS)
286 return 0;
287
288 if (pfk->dump.skb) {
289 if (!pfkey_can_dump(&pfk->sk))
290 return 0;
291
292 hdr = (struct sadb_msg *) pfk->dump.skb->data;
293 hdr->sadb_msg_seq = 0;
294 hdr->sadb_msg_errno = rc;
295 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
296 &pfk->sk, sock_net(&pfk->sk));
297 pfk->dump.skb = NULL;
298 }
299
300 pfkey_terminate_dump(pfk);
301 return rc;
302}
303
304static inline void pfkey_hdr_dup(struct sadb_msg *new,
305 const struct sadb_msg *orig)
306{
307 *new = *orig;
308}
309
310static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk)
311{
312 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
313 struct sadb_msg *hdr;
314
315 if (!skb)
316 return -ENOBUFS;
317
318 /* Woe be to the platform trying to support PFKEY yet
319 * having normal errnos outside the 1-255 range, inclusive.
320 */
321 err = -err;
322 if (err == ERESTARTSYS ||
323 err == ERESTARTNOHAND ||
324 err == ERESTARTNOINTR)
325 err = EINTR;
326 if (err >= 512)
327 err = EINVAL;
328 BUG_ON(err <= 0 || err >= 256);
329
330 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
331 pfkey_hdr_dup(hdr, orig);
332 hdr->sadb_msg_errno = (uint8_t) err;
333 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
334 sizeof(uint64_t));
335
336 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk));
337
338 return 0;
339}
340
341static u8 sadb_ext_min_len[] = {
342 [SADB_EXT_RESERVED] = (u8) 0,
343 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
344 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
345 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
346 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
347 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
348 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
349 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
350 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
351 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
352 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
353 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
354 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
355 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
356 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
357 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
358 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
359 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
360 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
361 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
362 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
363 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
364 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
365 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
366 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
367 [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress),
368};
369
370/* Verify sadb_address_{len,prefixlen} against sa_family. */
371static int verify_address_len(const void *p)
372{
373 const struct sadb_address *sp = p;
374 const struct sockaddr *addr = (const struct sockaddr *)(sp + 1);
375 const struct sockaddr_in *sin;
376#if IS_ENABLED(CONFIG_IPV6)
377 const struct sockaddr_in6 *sin6;
378#endif
379 int len;
380
381 switch (addr->sa_family) {
382 case AF_INET:
383 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
384 if (sp->sadb_address_len != len ||
385 sp->sadb_address_prefixlen > 32)
386 return -EINVAL;
387 break;
388#if IS_ENABLED(CONFIG_IPV6)
389 case AF_INET6:
390 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
391 if (sp->sadb_address_len != len ||
392 sp->sadb_address_prefixlen > 128)
393 return -EINVAL;
394 break;
395#endif
396 default:
397 /* It is user using kernel to keep track of security
398 * associations for another protocol, such as
399 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
400 * lengths.
401 *
402 * XXX Actually, association/policy database is not yet
403 * XXX able to cope with arbitrary sockaddr families.
404 * XXX When it can, remove this -EINVAL. -DaveM
405 */
406 return -EINVAL;
407 break;
408 }
409
410 return 0;
411}
412
413static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx)
414{
415 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
416 sec_ctx->sadb_x_ctx_len,
417 sizeof(uint64_t));
418}
419
420static inline int verify_sec_ctx_len(const void *p)
421{
422 const struct sadb_x_sec_ctx *sec_ctx = p;
423 int len = sec_ctx->sadb_x_ctx_len;
424
425 if (len > PAGE_SIZE)
426 return -EINVAL;
427
428 len = pfkey_sec_ctx_len(sec_ctx);
429
430 if (sec_ctx->sadb_x_sec_len != len)
431 return -EINVAL;
432
433 return 0;
434}
435
436static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx)
437{
438 struct xfrm_user_sec_ctx *uctx = NULL;
439 int ctx_size = sec_ctx->sadb_x_ctx_len;
440
441 uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
442
443 if (!uctx)
444 return NULL;
445
446 uctx->len = pfkey_sec_ctx_len(sec_ctx);
447 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
448 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
449 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
450 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
451 memcpy(uctx + 1, sec_ctx + 1,
452 uctx->ctx_len);
453
454 return uctx;
455}
456
457static int present_and_same_family(const struct sadb_address *src,
458 const struct sadb_address *dst)
459{
460 const struct sockaddr *s_addr, *d_addr;
461
462 if (!src || !dst)
463 return 0;
464
465 s_addr = (const struct sockaddr *)(src + 1);
466 d_addr = (const struct sockaddr *)(dst + 1);
467 if (s_addr->sa_family != d_addr->sa_family)
468 return 0;
469 if (s_addr->sa_family != AF_INET
470#if IS_ENABLED(CONFIG_IPV6)
471 && s_addr->sa_family != AF_INET6
472#endif
473 )
474 return 0;
475
476 return 1;
477}
478
479static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs)
480{
481 const char *p = (char *) hdr;
482 int len = skb->len;
483
484 len -= sizeof(*hdr);
485 p += sizeof(*hdr);
486 while (len > 0) {
487 const struct sadb_ext *ehdr = (const struct sadb_ext *) p;
488 uint16_t ext_type;
489 int ext_len;
490
491 ext_len = ehdr->sadb_ext_len;
492 ext_len *= sizeof(uint64_t);
493 ext_type = ehdr->sadb_ext_type;
494 if (ext_len < sizeof(uint64_t) ||
495 ext_len > len ||
496 ext_type == SADB_EXT_RESERVED)
497 return -EINVAL;
498
499 if (ext_type <= SADB_EXT_MAX) {
500 int min = (int) sadb_ext_min_len[ext_type];
501 if (ext_len < min)
502 return -EINVAL;
503 if (ext_hdrs[ext_type-1] != NULL)
504 return -EINVAL;
505 if (ext_type == SADB_EXT_ADDRESS_SRC ||
506 ext_type == SADB_EXT_ADDRESS_DST ||
507 ext_type == SADB_EXT_ADDRESS_PROXY ||
508 ext_type == SADB_X_EXT_NAT_T_OA) {
509 if (verify_address_len(p))
510 return -EINVAL;
511 }
512 if (ext_type == SADB_X_EXT_SEC_CTX) {
513 if (verify_sec_ctx_len(p))
514 return -EINVAL;
515 }
516 ext_hdrs[ext_type-1] = (void *) p;
517 }
518 p += ext_len;
519 len -= ext_len;
520 }
521
522 return 0;
523}
524
525static uint16_t
526pfkey_satype2proto(uint8_t satype)
527{
528 switch (satype) {
529 case SADB_SATYPE_UNSPEC:
530 return IPSEC_PROTO_ANY;
531 case SADB_SATYPE_AH:
532 return IPPROTO_AH;
533 case SADB_SATYPE_ESP:
534 return IPPROTO_ESP;
535 case SADB_X_SATYPE_IPCOMP:
536 return IPPROTO_COMP;
537 break;
538 default:
539 return 0;
540 }
541 /* NOTREACHED */
542}
543
544static uint8_t
545pfkey_proto2satype(uint16_t proto)
546{
547 switch (proto) {
548 case IPPROTO_AH:
549 return SADB_SATYPE_AH;
550 case IPPROTO_ESP:
551 return SADB_SATYPE_ESP;
552 case IPPROTO_COMP:
553 return SADB_X_SATYPE_IPCOMP;
554 break;
555 default:
556 return 0;
557 }
558 /* NOTREACHED */
559}
560
561/* BTW, this scheme means that there is no way with PFKEY2 sockets to
562 * say specifically 'just raw sockets' as we encode them as 255.
563 */
564
565static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
566{
567 return proto == IPSEC_PROTO_ANY ? 0 : proto;
568}
569
570static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
571{
572 return proto ? proto : IPSEC_PROTO_ANY;
573}
574
575static inline int pfkey_sockaddr_len(sa_family_t family)
576{
577 switch (family) {
578 case AF_INET:
579 return sizeof(struct sockaddr_in);
580#if IS_ENABLED(CONFIG_IPV6)
581 case AF_INET6:
582 return sizeof(struct sockaddr_in6);
583#endif
584 }
585 return 0;
586}
587
588static
589int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
590{
591 switch (sa->sa_family) {
592 case AF_INET:
593 xaddr->a4 =
594 ((struct sockaddr_in *)sa)->sin_addr.s_addr;
595 return AF_INET;
596#if IS_ENABLED(CONFIG_IPV6)
597 case AF_INET6:
598 memcpy(xaddr->a6,
599 &((struct sockaddr_in6 *)sa)->sin6_addr,
600 sizeof(struct in6_addr));
601 return AF_INET6;
602#endif
603 }
604 return 0;
605}
606
607static
608int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr)
609{
610 return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
611 xaddr);
612}
613
614static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs)
615{
616 const struct sadb_sa *sa;
617 const struct sadb_address *addr;
618 uint16_t proto;
619 unsigned short family;
620 xfrm_address_t *xaddr;
621
622 sa = ext_hdrs[SADB_EXT_SA - 1];
623 if (sa == NULL)
624 return NULL;
625
626 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
627 if (proto == 0)
628 return NULL;
629
630 /* sadb_address_len should be checked by caller */
631 addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
632 if (addr == NULL)
633 return NULL;
634
635 family = ((const struct sockaddr *)(addr + 1))->sa_family;
636 switch (family) {
637 case AF_INET:
638 xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr;
639 break;
640#if IS_ENABLED(CONFIG_IPV6)
641 case AF_INET6:
642 xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr;
643 break;
644#endif
645 default:
646 xaddr = NULL;
647 }
648
649 if (!xaddr)
650 return NULL;
651
652 return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family);
653}
654
655#define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
656
657static int
658pfkey_sockaddr_size(sa_family_t family)
659{
660 return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
661}
662
663static inline int pfkey_mode_from_xfrm(int mode)
664{
665 switch(mode) {
666 case XFRM_MODE_TRANSPORT:
667 return IPSEC_MODE_TRANSPORT;
668 case XFRM_MODE_TUNNEL:
669 return IPSEC_MODE_TUNNEL;
670 case XFRM_MODE_BEET:
671 return IPSEC_MODE_BEET;
672 default:
673 return -1;
674 }
675}
676
677static inline int pfkey_mode_to_xfrm(int mode)
678{
679 switch(mode) {
680 case IPSEC_MODE_ANY: /*XXX*/
681 case IPSEC_MODE_TRANSPORT:
682 return XFRM_MODE_TRANSPORT;
683 case IPSEC_MODE_TUNNEL:
684 return XFRM_MODE_TUNNEL;
685 case IPSEC_MODE_BEET:
686 return XFRM_MODE_BEET;
687 default:
688 return -1;
689 }
690}
691
692static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port,
693 struct sockaddr *sa,
694 unsigned short family)
695{
696 switch (family) {
697 case AF_INET:
698 {
699 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
700 sin->sin_family = AF_INET;
701 sin->sin_port = port;
702 sin->sin_addr.s_addr = xaddr->a4;
703 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
704 return 32;
705 }
706#if IS_ENABLED(CONFIG_IPV6)
707 case AF_INET6:
708 {
709 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
710 sin6->sin6_family = AF_INET6;
711 sin6->sin6_port = port;
712 sin6->sin6_flowinfo = 0;
713 sin6->sin6_addr = *(struct in6_addr *)xaddr->a6;
714 sin6->sin6_scope_id = 0;
715 return 128;
716 }
717#endif
718 }
719 return 0;
720}
721
722static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x,
723 int add_keys, int hsc)
724{
725 struct sk_buff *skb;
726 struct sadb_msg *hdr;
727 struct sadb_sa *sa;
728 struct sadb_lifetime *lifetime;
729 struct sadb_address *addr;
730 struct sadb_key *key;
731 struct sadb_x_sa2 *sa2;
732 struct sadb_x_sec_ctx *sec_ctx;
733 struct xfrm_sec_ctx *xfrm_ctx;
734 int ctx_size = 0;
735 int size;
736 int auth_key_size = 0;
737 int encrypt_key_size = 0;
738 int sockaddr_size;
739 struct xfrm_encap_tmpl *natt = NULL;
740 int mode;
741
742 /* address family check */
743 sockaddr_size = pfkey_sockaddr_size(x->props.family);
744 if (!sockaddr_size)
745 return ERR_PTR(-EINVAL);
746
747 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
748 key(AE), (identity(SD),) (sensitivity)> */
749 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
750 sizeof(struct sadb_lifetime) +
751 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
752 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
753 sizeof(struct sadb_address)*2 +
754 sockaddr_size*2 +
755 sizeof(struct sadb_x_sa2);
756
757 if ((xfrm_ctx = x->security)) {
758 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
759 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
760 }
761
762 /* identity & sensitivity */
763 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family))
764 size += sizeof(struct sadb_address) + sockaddr_size;
765
766 if (add_keys) {
767 if (x->aalg && x->aalg->alg_key_len) {
768 auth_key_size =
769 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
770 size += sizeof(struct sadb_key) + auth_key_size;
771 }
772 if (x->ealg && x->ealg->alg_key_len) {
773 encrypt_key_size =
774 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
775 size += sizeof(struct sadb_key) + encrypt_key_size;
776 }
777 }
778 if (x->encap)
779 natt = x->encap;
780
781 if (natt && natt->encap_type) {
782 size += sizeof(struct sadb_x_nat_t_type);
783 size += sizeof(struct sadb_x_nat_t_port);
784 size += sizeof(struct sadb_x_nat_t_port);
785 }
786
787 skb = alloc_skb(size + 16, GFP_ATOMIC);
788 if (skb == NULL)
789 return ERR_PTR(-ENOBUFS);
790
791 /* call should fill header later */
792 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
793 memset(hdr, 0, size); /* XXX do we need this ? */
794 hdr->sadb_msg_len = size / sizeof(uint64_t);
795
796 /* sa */
797 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
798 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
799 sa->sadb_sa_exttype = SADB_EXT_SA;
800 sa->sadb_sa_spi = x->id.spi;
801 sa->sadb_sa_replay = x->props.replay_window;
802 switch (x->km.state) {
803 case XFRM_STATE_VALID:
804 sa->sadb_sa_state = x->km.dying ?
805 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
806 break;
807 case XFRM_STATE_ACQ:
808 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
809 break;
810 default:
811 sa->sadb_sa_state = SADB_SASTATE_DEAD;
812 break;
813 }
814 sa->sadb_sa_auth = 0;
815 if (x->aalg) {
816 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
817 sa->sadb_sa_auth = (a && a->pfkey_supported) ?
818 a->desc.sadb_alg_id : 0;
819 }
820 sa->sadb_sa_encrypt = 0;
821 BUG_ON(x->ealg && x->calg);
822 if (x->ealg) {
823 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
824 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
825 a->desc.sadb_alg_id : 0;
826 }
827 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
828 if (x->calg) {
829 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
830 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
831 a->desc.sadb_alg_id : 0;
832 }
833
834 sa->sadb_sa_flags = 0;
835 if (x->props.flags & XFRM_STATE_NOECN)
836 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
837 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
838 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
839 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
840 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
841
842 /* hard time */
843 if (hsc & 2) {
844 lifetime = (struct sadb_lifetime *) skb_put(skb,
845 sizeof(struct sadb_lifetime));
846 lifetime->sadb_lifetime_len =
847 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
848 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
849 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
850 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
851 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
852 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
853 }
854 /* soft time */
855 if (hsc & 1) {
856 lifetime = (struct sadb_lifetime *) skb_put(skb,
857 sizeof(struct sadb_lifetime));
858 lifetime->sadb_lifetime_len =
859 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
860 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
861 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
862 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
863 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
864 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
865 }
866 /* current time */
867 lifetime = (struct sadb_lifetime *) skb_put(skb,
868 sizeof(struct sadb_lifetime));
869 lifetime->sadb_lifetime_len =
870 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
871 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
872 lifetime->sadb_lifetime_allocations = x->curlft.packets;
873 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
874 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
875 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
876 /* src address */
877 addr = (struct sadb_address*) skb_put(skb,
878 sizeof(struct sadb_address)+sockaddr_size);
879 addr->sadb_address_len =
880 (sizeof(struct sadb_address)+sockaddr_size)/
881 sizeof(uint64_t);
882 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
883 /* "if the ports are non-zero, then the sadb_address_proto field,
884 normally zero, MUST be filled in with the transport
885 protocol's number." - RFC2367 */
886 addr->sadb_address_proto = 0;
887 addr->sadb_address_reserved = 0;
888
889 addr->sadb_address_prefixlen =
890 pfkey_sockaddr_fill(&x->props.saddr, 0,
891 (struct sockaddr *) (addr + 1),
892 x->props.family);
893 if (!addr->sadb_address_prefixlen)
894 BUG();
895
896 /* dst address */
897 addr = (struct sadb_address*) skb_put(skb,
898 sizeof(struct sadb_address)+sockaddr_size);
899 addr->sadb_address_len =
900 (sizeof(struct sadb_address)+sockaddr_size)/
901 sizeof(uint64_t);
902 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
903 addr->sadb_address_proto = 0;
904 addr->sadb_address_reserved = 0;
905
906 addr->sadb_address_prefixlen =
907 pfkey_sockaddr_fill(&x->id.daddr, 0,
908 (struct sockaddr *) (addr + 1),
909 x->props.family);
910 if (!addr->sadb_address_prefixlen)
911 BUG();
912
913 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr,
914 x->props.family)) {
915 addr = (struct sadb_address*) skb_put(skb,
916 sizeof(struct sadb_address)+sockaddr_size);
917 addr->sadb_address_len =
918 (sizeof(struct sadb_address)+sockaddr_size)/
919 sizeof(uint64_t);
920 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
921 addr->sadb_address_proto =
922 pfkey_proto_from_xfrm(x->sel.proto);
923 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
924 addr->sadb_address_reserved = 0;
925
926 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
927 (struct sockaddr *) (addr + 1),
928 x->props.family);
929 }
930
931 /* auth key */
932 if (add_keys && auth_key_size) {
933 key = (struct sadb_key *) skb_put(skb,
934 sizeof(struct sadb_key)+auth_key_size);
935 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
936 sizeof(uint64_t);
937 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
938 key->sadb_key_bits = x->aalg->alg_key_len;
939 key->sadb_key_reserved = 0;
940 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
941 }
942 /* encrypt key */
943 if (add_keys && encrypt_key_size) {
944 key = (struct sadb_key *) skb_put(skb,
945 sizeof(struct sadb_key)+encrypt_key_size);
946 key->sadb_key_len = (sizeof(struct sadb_key) +
947 encrypt_key_size) / sizeof(uint64_t);
948 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
949 key->sadb_key_bits = x->ealg->alg_key_len;
950 key->sadb_key_reserved = 0;
951 memcpy(key + 1, x->ealg->alg_key,
952 (x->ealg->alg_key_len+7)/8);
953 }
954
955 /* sa */
956 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
957 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
958 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
959 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
960 kfree_skb(skb);
961 return ERR_PTR(-EINVAL);
962 }
963 sa2->sadb_x_sa2_mode = mode;
964 sa2->sadb_x_sa2_reserved1 = 0;
965 sa2->sadb_x_sa2_reserved2 = 0;
966 sa2->sadb_x_sa2_sequence = 0;
967 sa2->sadb_x_sa2_reqid = x->props.reqid;
968
969 if (natt && natt->encap_type) {
970 struct sadb_x_nat_t_type *n_type;
971 struct sadb_x_nat_t_port *n_port;
972
973 /* type */
974 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
975 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
976 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
977 n_type->sadb_x_nat_t_type_type = natt->encap_type;
978 n_type->sadb_x_nat_t_type_reserved[0] = 0;
979 n_type->sadb_x_nat_t_type_reserved[1] = 0;
980 n_type->sadb_x_nat_t_type_reserved[2] = 0;
981
982 /* source port */
983 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
984 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
985 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
986 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
987 n_port->sadb_x_nat_t_port_reserved = 0;
988
989 /* dest port */
990 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
991 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
992 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
993 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
994 n_port->sadb_x_nat_t_port_reserved = 0;
995 }
996
997 /* security context */
998 if (xfrm_ctx) {
999 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
1000 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1001 sec_ctx->sadb_x_sec_len =
1002 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1003 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1004 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1005 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1006 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1007 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1008 xfrm_ctx->ctx_len);
1009 }
1010
1011 return skb;
1012}
1013
1014
1015static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x)
1016{
1017 struct sk_buff *skb;
1018
1019 skb = __pfkey_xfrm_state2msg(x, 1, 3);
1020
1021 return skb;
1022}
1023
1024static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x,
1025 int hsc)
1026{
1027 return __pfkey_xfrm_state2msg(x, 0, hsc);
1028}
1029
1030static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
1031 const struct sadb_msg *hdr,
1032 void * const *ext_hdrs)
1033{
1034 struct xfrm_state *x;
1035 const struct sadb_lifetime *lifetime;
1036 const struct sadb_sa *sa;
1037 const struct sadb_key *key;
1038 const struct sadb_x_sec_ctx *sec_ctx;
1039 uint16_t proto;
1040 int err;
1041
1042
1043 sa = ext_hdrs[SADB_EXT_SA - 1];
1044 if (!sa ||
1045 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1046 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1047 return ERR_PTR(-EINVAL);
1048 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1049 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1050 return ERR_PTR(-EINVAL);
1051 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1052 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1053 return ERR_PTR(-EINVAL);
1054 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1055 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1056 return ERR_PTR(-EINVAL);
1057
1058 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1059 if (proto == 0)
1060 return ERR_PTR(-EINVAL);
1061
1062 /* default error is no buffer space */
1063 err = -ENOBUFS;
1064
1065 /* RFC2367:
1066
1067 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1068 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1069 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1070 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1071 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1072 not true.
1073
1074 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1075 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1076 */
1077 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1078 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1079 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1080 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1081 return ERR_PTR(-EINVAL);
1082 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1083 if (key != NULL &&
1084 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1085 ((key->sadb_key_bits+7) / 8 == 0 ||
1086 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1087 return ERR_PTR(-EINVAL);
1088 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1089 if (key != NULL &&
1090 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1091 ((key->sadb_key_bits+7) / 8 == 0 ||
1092 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1093 return ERR_PTR(-EINVAL);
1094
1095 x = xfrm_state_alloc(net);
1096 if (x == NULL)
1097 return ERR_PTR(-ENOBUFS);
1098
1099 x->id.proto = proto;
1100 x->id.spi = sa->sadb_sa_spi;
1101 x->props.replay_window = sa->sadb_sa_replay;
1102 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1103 x->props.flags |= XFRM_STATE_NOECN;
1104 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1105 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1106 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1107 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1108
1109 lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1];
1110 if (lifetime != NULL) {
1111 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1112 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1113 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1114 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1115 }
1116 lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1];
1117 if (lifetime != NULL) {
1118 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1119 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1120 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1121 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1122 }
1123
1124 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
1125 if (sec_ctx != NULL) {
1126 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1127
1128 if (!uctx)
1129 goto out;
1130
1131 err = security_xfrm_state_alloc(x, uctx);
1132 kfree(uctx);
1133
1134 if (err)
1135 goto out;
1136 }
1137
1138 err = -ENOBUFS;
1139 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1140 if (sa->sadb_sa_auth) {
1141 int keysize = 0;
1142 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1143 if (!a || !a->pfkey_supported) {
1144 err = -ENOSYS;
1145 goto out;
1146 }
1147 if (key)
1148 keysize = (key->sadb_key_bits + 7) / 8;
1149 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1150 if (!x->aalg) {
1151 err = -ENOMEM;
1152 goto out;
1153 }
1154 strcpy(x->aalg->alg_name, a->name);
1155 x->aalg->alg_key_len = 0;
1156 if (key) {
1157 x->aalg->alg_key_len = key->sadb_key_bits;
1158 memcpy(x->aalg->alg_key, key+1, keysize);
1159 }
1160 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1161 x->props.aalgo = sa->sadb_sa_auth;
1162 /* x->algo.flags = sa->sadb_sa_flags; */
1163 }
1164 if (sa->sadb_sa_encrypt) {
1165 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1166 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1167 if (!a || !a->pfkey_supported) {
1168 err = -ENOSYS;
1169 goto out;
1170 }
1171 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1172 if (!x->calg) {
1173 err = -ENOMEM;
1174 goto out;
1175 }
1176 strcpy(x->calg->alg_name, a->name);
1177 x->props.calgo = sa->sadb_sa_encrypt;
1178 } else {
1179 int keysize = 0;
1180 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1181 if (!a || !a->pfkey_supported) {
1182 err = -ENOSYS;
1183 goto out;
1184 }
1185 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1186 if (key)
1187 keysize = (key->sadb_key_bits + 7) / 8;
1188 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1189 if (!x->ealg) {
1190 err = -ENOMEM;
1191 goto out;
1192 }
1193 strcpy(x->ealg->alg_name, a->name);
1194 x->ealg->alg_key_len = 0;
1195 if (key) {
1196 x->ealg->alg_key_len = key->sadb_key_bits;
1197 memcpy(x->ealg->alg_key, key+1, keysize);
1198 }
1199 x->props.ealgo = sa->sadb_sa_encrypt;
1200 }
1201 }
1202 /* x->algo.flags = sa->sadb_sa_flags; */
1203
1204 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1205 &x->props.saddr);
1206 if (!x->props.family) {
1207 err = -EAFNOSUPPORT;
1208 goto out;
1209 }
1210 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1211 &x->id.daddr);
1212
1213 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1214 const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
1215 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1216 if (mode < 0) {
1217 err = -EINVAL;
1218 goto out;
1219 }
1220 x->props.mode = mode;
1221 x->props.reqid = sa2->sadb_x_sa2_reqid;
1222 }
1223
1224 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1225 const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1226
1227 /* Nobody uses this, but we try. */
1228 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1229 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1230 }
1231
1232 if (!x->sel.family)
1233 x->sel.family = x->props.family;
1234
1235 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1236 const struct sadb_x_nat_t_type* n_type;
1237 struct xfrm_encap_tmpl *natt;
1238
1239 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1240 if (!x->encap) {
1241 err = -ENOMEM;
1242 goto out;
1243 }
1244
1245 natt = x->encap;
1246 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1247 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1248
1249 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1250 const struct sadb_x_nat_t_port *n_port =
1251 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1252 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1253 }
1254 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1255 const struct sadb_x_nat_t_port *n_port =
1256 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1257 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1258 }
1259 memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
1260 }
1261
1262 err = xfrm_init_state(x);
1263 if (err)
1264 goto out;
1265
1266 x->km.seq = hdr->sadb_msg_seq;
1267 return x;
1268
1269out:
1270 x->km.state = XFRM_STATE_DEAD;
1271 xfrm_state_put(x);
1272 return ERR_PTR(err);
1273}
1274
1275static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1276{
1277 return -EOPNOTSUPP;
1278}
1279
1280static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1281{
1282 struct net *net = sock_net(sk);
1283 struct sk_buff *resp_skb;
1284 struct sadb_x_sa2 *sa2;
1285 struct sadb_address *saddr, *daddr;
1286 struct sadb_msg *out_hdr;
1287 struct sadb_spirange *range;
1288 struct xfrm_state *x = NULL;
1289 int mode;
1290 int err;
1291 u32 min_spi, max_spi;
1292 u32 reqid;
1293 u8 proto;
1294 unsigned short family;
1295 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1296
1297 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1298 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1299 return -EINVAL;
1300
1301 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1302 if (proto == 0)
1303 return -EINVAL;
1304
1305 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1306 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1307 if (mode < 0)
1308 return -EINVAL;
1309 reqid = sa2->sadb_x_sa2_reqid;
1310 } else {
1311 mode = 0;
1312 reqid = 0;
1313 }
1314
1315 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1316 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1317
1318 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1319 switch (family) {
1320 case AF_INET:
1321 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1322 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1323 break;
1324#if IS_ENABLED(CONFIG_IPV6)
1325 case AF_INET6:
1326 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1327 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1328 break;
1329#endif
1330 }
1331
1332 if (hdr->sadb_msg_seq) {
1333 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1334 if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) {
1335 xfrm_state_put(x);
1336 x = NULL;
1337 }
1338 }
1339
1340 if (!x)
1341 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family);
1342
1343 if (x == NULL)
1344 return -ENOENT;
1345
1346 min_spi = 0x100;
1347 max_spi = 0x0fffffff;
1348
1349 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1350 if (range) {
1351 min_spi = range->sadb_spirange_min;
1352 max_spi = range->sadb_spirange_max;
1353 }
1354
1355 err = xfrm_alloc_spi(x, min_spi, max_spi);
1356 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1357
1358 if (IS_ERR(resp_skb)) {
1359 xfrm_state_put(x);
1360 return PTR_ERR(resp_skb);
1361 }
1362
1363 out_hdr = (struct sadb_msg *) resp_skb->data;
1364 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1365 out_hdr->sadb_msg_type = SADB_GETSPI;
1366 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1367 out_hdr->sadb_msg_errno = 0;
1368 out_hdr->sadb_msg_reserved = 0;
1369 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1370 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1371
1372 xfrm_state_put(x);
1373
1374 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
1375
1376 return 0;
1377}
1378
1379static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1380{
1381 struct net *net = sock_net(sk);
1382 struct xfrm_state *x;
1383
1384 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1385 return -EOPNOTSUPP;
1386
1387 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1388 return 0;
1389
1390 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1391 if (x == NULL)
1392 return 0;
1393
1394 spin_lock_bh(&x->lock);
1395 if (x->km.state == XFRM_STATE_ACQ) {
1396 x->km.state = XFRM_STATE_ERROR;
1397 wake_up(&net->xfrm.km_waitq);
1398 }
1399 spin_unlock_bh(&x->lock);
1400 xfrm_state_put(x);
1401 return 0;
1402}
1403
1404static inline int event2poltype(int event)
1405{
1406 switch (event) {
1407 case XFRM_MSG_DELPOLICY:
1408 return SADB_X_SPDDELETE;
1409 case XFRM_MSG_NEWPOLICY:
1410 return SADB_X_SPDADD;
1411 case XFRM_MSG_UPDPOLICY:
1412 return SADB_X_SPDUPDATE;
1413 case XFRM_MSG_POLEXPIRE:
1414 // return SADB_X_SPDEXPIRE;
1415 default:
1416 pr_err("pfkey: Unknown policy event %d\n", event);
1417 break;
1418 }
1419
1420 return 0;
1421}
1422
1423static inline int event2keytype(int event)
1424{
1425 switch (event) {
1426 case XFRM_MSG_DELSA:
1427 return SADB_DELETE;
1428 case XFRM_MSG_NEWSA:
1429 return SADB_ADD;
1430 case XFRM_MSG_UPDSA:
1431 return SADB_UPDATE;
1432 case XFRM_MSG_EXPIRE:
1433 return SADB_EXPIRE;
1434 default:
1435 pr_err("pfkey: Unknown SA event %d\n", event);
1436 break;
1437 }
1438
1439 return 0;
1440}
1441
1442/* ADD/UPD/DEL */
1443static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
1444{
1445 struct sk_buff *skb;
1446 struct sadb_msg *hdr;
1447
1448 skb = pfkey_xfrm_state2msg(x);
1449
1450 if (IS_ERR(skb))
1451 return PTR_ERR(skb);
1452
1453 hdr = (struct sadb_msg *) skb->data;
1454 hdr->sadb_msg_version = PF_KEY_V2;
1455 hdr->sadb_msg_type = event2keytype(c->event);
1456 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1457 hdr->sadb_msg_errno = 0;
1458 hdr->sadb_msg_reserved = 0;
1459 hdr->sadb_msg_seq = c->seq;
1460 hdr->sadb_msg_pid = c->portid;
1461
1462 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
1463
1464 return 0;
1465}
1466
1467static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1468{
1469 struct net *net = sock_net(sk);
1470 struct xfrm_state *x;
1471 int err;
1472 struct km_event c;
1473
1474 x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1475 if (IS_ERR(x))
1476 return PTR_ERR(x);
1477
1478 xfrm_state_hold(x);
1479 if (hdr->sadb_msg_type == SADB_ADD)
1480 err = xfrm_state_add(x);
1481 else
1482 err = xfrm_state_update(x);
1483
1484 xfrm_audit_state_add(x, err ? 0 : 1,
1485 audit_get_loginuid(current),
1486 audit_get_sessionid(current), 0);
1487
1488 if (err < 0) {
1489 x->km.state = XFRM_STATE_DEAD;
1490 __xfrm_state_put(x);
1491 goto out;
1492 }
1493
1494 if (hdr->sadb_msg_type == SADB_ADD)
1495 c.event = XFRM_MSG_NEWSA;
1496 else
1497 c.event = XFRM_MSG_UPDSA;
1498 c.seq = hdr->sadb_msg_seq;
1499 c.portid = hdr->sadb_msg_pid;
1500 km_state_notify(x, &c);
1501out:
1502 xfrm_state_put(x);
1503 return err;
1504}
1505
1506static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1507{
1508 struct net *net = sock_net(sk);
1509 struct xfrm_state *x;
1510 struct km_event c;
1511 int err;
1512
1513 if (!ext_hdrs[SADB_EXT_SA-1] ||
1514 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1515 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1516 return -EINVAL;
1517
1518 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1519 if (x == NULL)
1520 return -ESRCH;
1521
1522 if ((err = security_xfrm_state_delete(x)))
1523 goto out;
1524
1525 if (xfrm_state_kern(x)) {
1526 err = -EPERM;
1527 goto out;
1528 }
1529
1530 err = xfrm_state_delete(x);
1531
1532 if (err < 0)
1533 goto out;
1534
1535 c.seq = hdr->sadb_msg_seq;
1536 c.portid = hdr->sadb_msg_pid;
1537 c.event = XFRM_MSG_DELSA;
1538 km_state_notify(x, &c);
1539out:
1540 xfrm_audit_state_delete(x, err ? 0 : 1,
1541 audit_get_loginuid(current),
1542 audit_get_sessionid(current), 0);
1543 xfrm_state_put(x);
1544
1545 return err;
1546}
1547
1548static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1549{
1550 struct net *net = sock_net(sk);
1551 __u8 proto;
1552 struct sk_buff *out_skb;
1553 struct sadb_msg *out_hdr;
1554 struct xfrm_state *x;
1555
1556 if (!ext_hdrs[SADB_EXT_SA-1] ||
1557 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1558 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1559 return -EINVAL;
1560
1561 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1562 if (x == NULL)
1563 return -ESRCH;
1564
1565 out_skb = pfkey_xfrm_state2msg(x);
1566 proto = x->id.proto;
1567 xfrm_state_put(x);
1568 if (IS_ERR(out_skb))
1569 return PTR_ERR(out_skb);
1570
1571 out_hdr = (struct sadb_msg *) out_skb->data;
1572 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1573 out_hdr->sadb_msg_type = SADB_GET;
1574 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1575 out_hdr->sadb_msg_errno = 0;
1576 out_hdr->sadb_msg_reserved = 0;
1577 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1578 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1579 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1580
1581 return 0;
1582}
1583
1584static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
1585 gfp_t allocation)
1586{
1587 struct sk_buff *skb;
1588 struct sadb_msg *hdr;
1589 int len, auth_len, enc_len, i;
1590
1591 auth_len = xfrm_count_pfkey_auth_supported();
1592 if (auth_len) {
1593 auth_len *= sizeof(struct sadb_alg);
1594 auth_len += sizeof(struct sadb_supported);
1595 }
1596
1597 enc_len = xfrm_count_pfkey_enc_supported();
1598 if (enc_len) {
1599 enc_len *= sizeof(struct sadb_alg);
1600 enc_len += sizeof(struct sadb_supported);
1601 }
1602
1603 len = enc_len + auth_len + sizeof(struct sadb_msg);
1604
1605 skb = alloc_skb(len + 16, allocation);
1606 if (!skb)
1607 goto out_put_algs;
1608
1609 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1610 pfkey_hdr_dup(hdr, orig);
1611 hdr->sadb_msg_errno = 0;
1612 hdr->sadb_msg_len = len / sizeof(uint64_t);
1613
1614 if (auth_len) {
1615 struct sadb_supported *sp;
1616 struct sadb_alg *ap;
1617
1618 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1619 ap = (struct sadb_alg *) (sp + 1);
1620
1621 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1622 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1623
1624 for (i = 0; ; i++) {
1625 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1626 if (!aalg)
1627 break;
1628 if (!aalg->pfkey_supported)
1629 continue;
1630 if (aalg->available)
1631 *ap++ = aalg->desc;
1632 }
1633 }
1634
1635 if (enc_len) {
1636 struct sadb_supported *sp;
1637 struct sadb_alg *ap;
1638
1639 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1640 ap = (struct sadb_alg *) (sp + 1);
1641
1642 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1643 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1644
1645 for (i = 0; ; i++) {
1646 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1647 if (!ealg)
1648 break;
1649 if (!ealg->pfkey_supported)
1650 continue;
1651 if (ealg->available)
1652 *ap++ = ealg->desc;
1653 }
1654 }
1655
1656out_put_algs:
1657 return skb;
1658}
1659
1660static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1661{
1662 struct pfkey_sock *pfk = pfkey_sk(sk);
1663 struct sk_buff *supp_skb;
1664
1665 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1666 return -EINVAL;
1667
1668 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1669 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1670 return -EEXIST;
1671 pfk->registered |= (1<<hdr->sadb_msg_satype);
1672 }
1673
1674 xfrm_probe_algs();
1675
1676 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1677 if (!supp_skb) {
1678 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1679 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1680
1681 return -ENOBUFS;
1682 }
1683
1684 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, sock_net(sk));
1685
1686 return 0;
1687}
1688
1689static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
1690{
1691 struct sk_buff *skb;
1692 struct sadb_msg *hdr;
1693
1694 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1695 if (!skb)
1696 return -ENOBUFS;
1697
1698 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1699 memcpy(hdr, ihdr, sizeof(struct sadb_msg));
1700 hdr->sadb_msg_errno = (uint8_t) 0;
1701 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1702
1703 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1704}
1705
1706static int key_notify_sa_flush(const struct km_event *c)
1707{
1708 struct sk_buff *skb;
1709 struct sadb_msg *hdr;
1710
1711 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1712 if (!skb)
1713 return -ENOBUFS;
1714 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1715 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1716 hdr->sadb_msg_type = SADB_FLUSH;
1717 hdr->sadb_msg_seq = c->seq;
1718 hdr->sadb_msg_pid = c->portid;
1719 hdr->sadb_msg_version = PF_KEY_V2;
1720 hdr->sadb_msg_errno = (uint8_t) 0;
1721 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1722 hdr->sadb_msg_reserved = 0;
1723
1724 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
1725
1726 return 0;
1727}
1728
1729static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1730{
1731 struct net *net = sock_net(sk);
1732 unsigned int proto;
1733 struct km_event c;
1734 struct xfrm_audit audit_info;
1735 int err, err2;
1736
1737 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1738 if (proto == 0)
1739 return -EINVAL;
1740
1741 audit_info.loginuid = audit_get_loginuid(current);
1742 audit_info.sessionid = audit_get_sessionid(current);
1743 audit_info.secid = 0;
1744 err = xfrm_state_flush(net, proto, &audit_info);
1745 err2 = unicast_flush_resp(sk, hdr);
1746 if (err || err2) {
1747 if (err == -ESRCH) /* empty table - go quietly */
1748 err = 0;
1749 return err ? err : err2;
1750 }
1751
1752 c.data.proto = proto;
1753 c.seq = hdr->sadb_msg_seq;
1754 c.portid = hdr->sadb_msg_pid;
1755 c.event = XFRM_MSG_FLUSHSA;
1756 c.net = net;
1757 km_state_notify(NULL, &c);
1758
1759 return 0;
1760}
1761
1762static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1763{
1764 struct pfkey_sock *pfk = ptr;
1765 struct sk_buff *out_skb;
1766 struct sadb_msg *out_hdr;
1767
1768 if (!pfkey_can_dump(&pfk->sk))
1769 return -ENOBUFS;
1770
1771 out_skb = pfkey_xfrm_state2msg(x);
1772 if (IS_ERR(out_skb))
1773 return PTR_ERR(out_skb);
1774
1775 out_hdr = (struct sadb_msg *) out_skb->data;
1776 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1777 out_hdr->sadb_msg_type = SADB_DUMP;
1778 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1779 out_hdr->sadb_msg_errno = 0;
1780 out_hdr->sadb_msg_reserved = 0;
1781 out_hdr->sadb_msg_seq = count + 1;
1782 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
1783
1784 if (pfk->dump.skb)
1785 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
1786 &pfk->sk, sock_net(&pfk->sk));
1787 pfk->dump.skb = out_skb;
1788
1789 return 0;
1790}
1791
1792static int pfkey_dump_sa(struct pfkey_sock *pfk)
1793{
1794 struct net *net = sock_net(&pfk->sk);
1795 return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1796}
1797
1798static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1799{
1800 xfrm_state_walk_done(&pfk->dump.u.state);
1801}
1802
1803static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1804{
1805 u8 proto;
1806 struct pfkey_sock *pfk = pfkey_sk(sk);
1807
1808 if (pfk->dump.dump != NULL)
1809 return -EBUSY;
1810
1811 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1812 if (proto == 0)
1813 return -EINVAL;
1814
1815 pfk->dump.msg_version = hdr->sadb_msg_version;
1816 pfk->dump.msg_portid = hdr->sadb_msg_pid;
1817 pfk->dump.dump = pfkey_dump_sa;
1818 pfk->dump.done = pfkey_dump_sa_done;
1819 xfrm_state_walk_init(&pfk->dump.u.state, proto);
1820
1821 return pfkey_do_dump(pfk);
1822}
1823
1824static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1825{
1826 struct pfkey_sock *pfk = pfkey_sk(sk);
1827 int satype = hdr->sadb_msg_satype;
1828 bool reset_errno = false;
1829
1830 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1831 reset_errno = true;
1832 if (satype != 0 && satype != 1)
1833 return -EINVAL;
1834 pfk->promisc = satype;
1835 }
1836 if (reset_errno && skb_cloned(skb))
1837 skb = skb_copy(skb, GFP_KERNEL);
1838 else
1839 skb = skb_clone(skb, GFP_KERNEL);
1840
1841 if (reset_errno && skb) {
1842 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1843 new_hdr->sadb_msg_errno = 0;
1844 }
1845
1846 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
1847 return 0;
1848}
1849
1850static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1851{
1852 int i;
1853 u32 reqid = *(u32*)ptr;
1854
1855 for (i=0; i<xp->xfrm_nr; i++) {
1856 if (xp->xfrm_vec[i].reqid == reqid)
1857 return -EEXIST;
1858 }
1859 return 0;
1860}
1861
1862static u32 gen_reqid(struct net *net)
1863{
1864 struct xfrm_policy_walk walk;
1865 u32 start;
1866 int rc;
1867 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1868
1869 start = reqid;
1870 do {
1871 ++reqid;
1872 if (reqid == 0)
1873 reqid = IPSEC_MANUAL_REQID_MAX+1;
1874 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1875 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1876 xfrm_policy_walk_done(&walk);
1877 if (rc != -EEXIST)
1878 return reqid;
1879 } while (reqid != start);
1880 return 0;
1881}
1882
1883static int
1884parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1885{
1886 struct net *net = xp_net(xp);
1887 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1888 int mode;
1889
1890 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1891 return -ELOOP;
1892
1893 if (rq->sadb_x_ipsecrequest_mode == 0)
1894 return -EINVAL;
1895
1896 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1897 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1898 return -EINVAL;
1899 t->mode = mode;
1900 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1901 t->optional = 1;
1902 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1903 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1904 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1905 t->reqid = 0;
1906 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1907 return -ENOBUFS;
1908 }
1909
1910 /* addresses present only in tunnel mode */
1911 if (t->mode == XFRM_MODE_TUNNEL) {
1912 u8 *sa = (u8 *) (rq + 1);
1913 int family, socklen;
1914
1915 family = pfkey_sockaddr_extract((struct sockaddr *)sa,
1916 &t->saddr);
1917 if (!family)
1918 return -EINVAL;
1919
1920 socklen = pfkey_sockaddr_len(family);
1921 if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen),
1922 &t->id.daddr) != family)
1923 return -EINVAL;
1924 t->encap_family = family;
1925 } else
1926 t->encap_family = xp->family;
1927
1928 /* No way to set this via kame pfkey */
1929 t->allalgs = 1;
1930 xp->xfrm_nr++;
1931 return 0;
1932}
1933
1934static int
1935parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1936{
1937 int err;
1938 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1939 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1940
1941 if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
1942 return -EINVAL;
1943
1944 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1945 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1946 return err;
1947 len -= rq->sadb_x_ipsecrequest_len;
1948 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1949 }
1950 return 0;
1951}
1952
1953static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
1954{
1955 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1956
1957 if (xfrm_ctx) {
1958 int len = sizeof(struct sadb_x_sec_ctx);
1959 len += xfrm_ctx->ctx_len;
1960 return PFKEY_ALIGN8(len);
1961 }
1962 return 0;
1963}
1964
1965static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
1966{
1967 const struct xfrm_tmpl *t;
1968 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1969 int socklen = 0;
1970 int i;
1971
1972 for (i=0; i<xp->xfrm_nr; i++) {
1973 t = xp->xfrm_vec + i;
1974 socklen += pfkey_sockaddr_len(t->encap_family);
1975 }
1976
1977 return sizeof(struct sadb_msg) +
1978 (sizeof(struct sadb_lifetime) * 3) +
1979 (sizeof(struct sadb_address) * 2) +
1980 (sockaddr_size * 2) +
1981 sizeof(struct sadb_x_policy) +
1982 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1983 (socklen * 2) +
1984 pfkey_xfrm_policy2sec_ctx_size(xp);
1985}
1986
1987static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
1988{
1989 struct sk_buff *skb;
1990 int size;
1991
1992 size = pfkey_xfrm_policy2msg_size(xp);
1993
1994 skb = alloc_skb(size + 16, GFP_ATOMIC);
1995 if (skb == NULL)
1996 return ERR_PTR(-ENOBUFS);
1997
1998 return skb;
1999}
2000
2001static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
2002{
2003 struct sadb_msg *hdr;
2004 struct sadb_address *addr;
2005 struct sadb_lifetime *lifetime;
2006 struct sadb_x_policy *pol;
2007 struct sadb_x_sec_ctx *sec_ctx;
2008 struct xfrm_sec_ctx *xfrm_ctx;
2009 int i;
2010 int size;
2011 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2012 int socklen = pfkey_sockaddr_len(xp->family);
2013
2014 size = pfkey_xfrm_policy2msg_size(xp);
2015
2016 /* call should fill header later */
2017 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2018 memset(hdr, 0, size); /* XXX do we need this ? */
2019
2020 /* src address */
2021 addr = (struct sadb_address*) skb_put(skb,
2022 sizeof(struct sadb_address)+sockaddr_size);
2023 addr->sadb_address_len =
2024 (sizeof(struct sadb_address)+sockaddr_size)/
2025 sizeof(uint64_t);
2026 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2027 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2028 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2029 addr->sadb_address_reserved = 0;
2030 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2031 xp->selector.sport,
2032 (struct sockaddr *) (addr + 1),
2033 xp->family))
2034 BUG();
2035
2036 /* dst address */
2037 addr = (struct sadb_address*) skb_put(skb,
2038 sizeof(struct sadb_address)+sockaddr_size);
2039 addr->sadb_address_len =
2040 (sizeof(struct sadb_address)+sockaddr_size)/
2041 sizeof(uint64_t);
2042 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2043 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2044 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2045 addr->sadb_address_reserved = 0;
2046
2047 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2048 (struct sockaddr *) (addr + 1),
2049 xp->family);
2050
2051 /* hard time */
2052 lifetime = (struct sadb_lifetime *) skb_put(skb,
2053 sizeof(struct sadb_lifetime));
2054 lifetime->sadb_lifetime_len =
2055 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2056 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2057 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2058 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2059 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2060 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2061 /* soft time */
2062 lifetime = (struct sadb_lifetime *) skb_put(skb,
2063 sizeof(struct sadb_lifetime));
2064 lifetime->sadb_lifetime_len =
2065 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2066 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2067 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2068 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2069 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2070 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2071 /* current time */
2072 lifetime = (struct sadb_lifetime *) skb_put(skb,
2073 sizeof(struct sadb_lifetime));
2074 lifetime->sadb_lifetime_len =
2075 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2076 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2077 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2078 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2079 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2080 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2081
2082 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2083 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2084 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2085 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2086 if (xp->action == XFRM_POLICY_ALLOW) {
2087 if (xp->xfrm_nr)
2088 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2089 else
2090 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2091 }
2092 pol->sadb_x_policy_dir = dir+1;
2093 pol->sadb_x_policy_reserved = 0;
2094 pol->sadb_x_policy_id = xp->index;
2095 pol->sadb_x_policy_priority = xp->priority;
2096
2097 for (i=0; i<xp->xfrm_nr; i++) {
2098 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
2099 struct sadb_x_ipsecrequest *rq;
2100 int req_size;
2101 int mode;
2102
2103 req_size = sizeof(struct sadb_x_ipsecrequest);
2104 if (t->mode == XFRM_MODE_TUNNEL) {
2105 socklen = pfkey_sockaddr_len(t->encap_family);
2106 req_size += socklen * 2;
2107 } else {
2108 size -= 2*socklen;
2109 }
2110 rq = (void*)skb_put(skb, req_size);
2111 pol->sadb_x_policy_len += req_size/8;
2112 memset(rq, 0, sizeof(*rq));
2113 rq->sadb_x_ipsecrequest_len = req_size;
2114 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2115 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2116 return -EINVAL;
2117 rq->sadb_x_ipsecrequest_mode = mode;
2118 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2119 if (t->reqid)
2120 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2121 if (t->optional)
2122 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2123 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2124
2125 if (t->mode == XFRM_MODE_TUNNEL) {
2126 u8 *sa = (void *)(rq + 1);
2127 pfkey_sockaddr_fill(&t->saddr, 0,
2128 (struct sockaddr *)sa,
2129 t->encap_family);
2130 pfkey_sockaddr_fill(&t->id.daddr, 0,
2131 (struct sockaddr *) (sa + socklen),
2132 t->encap_family);
2133 }
2134 }
2135
2136 /* security context */
2137 if ((xfrm_ctx = xp->security)) {
2138 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2139
2140 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2141 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2142 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2143 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2144 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2145 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2146 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2147 xfrm_ctx->ctx_len);
2148 }
2149
2150 hdr->sadb_msg_len = size / sizeof(uint64_t);
2151 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2152
2153 return 0;
2154}
2155
2156static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2157{
2158 struct sk_buff *out_skb;
2159 struct sadb_msg *out_hdr;
2160 int err;
2161
2162 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2163 if (IS_ERR(out_skb))
2164 return PTR_ERR(out_skb);
2165
2166 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2167 if (err < 0)
2168 return err;
2169
2170 out_hdr = (struct sadb_msg *) out_skb->data;
2171 out_hdr->sadb_msg_version = PF_KEY_V2;
2172
2173 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2174 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2175 else
2176 out_hdr->sadb_msg_type = event2poltype(c->event);
2177 out_hdr->sadb_msg_errno = 0;
2178 out_hdr->sadb_msg_seq = c->seq;
2179 out_hdr->sadb_msg_pid = c->portid;
2180 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
2181 return 0;
2182
2183}
2184
2185static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2186{
2187 struct net *net = sock_net(sk);
2188 int err = 0;
2189 struct sadb_lifetime *lifetime;
2190 struct sadb_address *sa;
2191 struct sadb_x_policy *pol;
2192 struct xfrm_policy *xp;
2193 struct km_event c;
2194 struct sadb_x_sec_ctx *sec_ctx;
2195
2196 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2197 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2198 !ext_hdrs[SADB_X_EXT_POLICY-1])
2199 return -EINVAL;
2200
2201 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2202 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2203 return -EINVAL;
2204 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2205 return -EINVAL;
2206
2207 xp = xfrm_policy_alloc(net, GFP_KERNEL);
2208 if (xp == NULL)
2209 return -ENOBUFS;
2210
2211 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2212 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2213 xp->priority = pol->sadb_x_policy_priority;
2214
2215 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2216 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2217 if (!xp->family) {
2218 err = -EINVAL;
2219 goto out;
2220 }
2221 xp->selector.family = xp->family;
2222 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2223 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2224 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2225 if (xp->selector.sport)
2226 xp->selector.sport_mask = htons(0xffff);
2227
2228 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2229 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2230 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2231
2232 /* Amusing, we set this twice. KAME apps appear to set same value
2233 * in both addresses.
2234 */
2235 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2236
2237 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2238 if (xp->selector.dport)
2239 xp->selector.dport_mask = htons(0xffff);
2240
2241 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2242 if (sec_ctx != NULL) {
2243 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2244
2245 if (!uctx) {
2246 err = -ENOBUFS;
2247 goto out;
2248 }
2249
2250 err = security_xfrm_policy_alloc(&xp->security, uctx);
2251 kfree(uctx);
2252
2253 if (err)
2254 goto out;
2255 }
2256
2257 xp->lft.soft_byte_limit = XFRM_INF;
2258 xp->lft.hard_byte_limit = XFRM_INF;
2259 xp->lft.soft_packet_limit = XFRM_INF;
2260 xp->lft.hard_packet_limit = XFRM_INF;
2261 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2262 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2263 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2264 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2265 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2266 }
2267 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2268 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2269 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2270 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2271 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2272 }
2273 xp->xfrm_nr = 0;
2274 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2275 (err = parse_ipsecrequests(xp, pol)) < 0)
2276 goto out;
2277
2278 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2279 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2280
2281 xfrm_audit_policy_add(xp, err ? 0 : 1,
2282 audit_get_loginuid(current),
2283 audit_get_sessionid(current), 0);
2284
2285 if (err)
2286 goto out;
2287
2288 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2289 c.event = XFRM_MSG_UPDPOLICY;
2290 else
2291 c.event = XFRM_MSG_NEWPOLICY;
2292
2293 c.seq = hdr->sadb_msg_seq;
2294 c.portid = hdr->sadb_msg_pid;
2295
2296 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2297 xfrm_pol_put(xp);
2298 return 0;
2299
2300out:
2301 xp->walk.dead = 1;
2302 xfrm_policy_destroy(xp);
2303 return err;
2304}
2305
2306static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2307{
2308 struct net *net = sock_net(sk);
2309 int err;
2310 struct sadb_address *sa;
2311 struct sadb_x_policy *pol;
2312 struct xfrm_policy *xp;
2313 struct xfrm_selector sel;
2314 struct km_event c;
2315 struct sadb_x_sec_ctx *sec_ctx;
2316 struct xfrm_sec_ctx *pol_ctx = NULL;
2317
2318 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2319 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2320 !ext_hdrs[SADB_X_EXT_POLICY-1])
2321 return -EINVAL;
2322
2323 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2324 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2325 return -EINVAL;
2326
2327 memset(&sel, 0, sizeof(sel));
2328
2329 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2330 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2331 sel.prefixlen_s = sa->sadb_address_prefixlen;
2332 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2333 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2334 if (sel.sport)
2335 sel.sport_mask = htons(0xffff);
2336
2337 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2338 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2339 sel.prefixlen_d = sa->sadb_address_prefixlen;
2340 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2341 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2342 if (sel.dport)
2343 sel.dport_mask = htons(0xffff);
2344
2345 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2346 if (sec_ctx != NULL) {
2347 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2348
2349 if (!uctx)
2350 return -ENOMEM;
2351
2352 err = security_xfrm_policy_alloc(&pol_ctx, uctx);
2353 kfree(uctx);
2354 if (err)
2355 return err;
2356 }
2357
2358 xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2359 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2360 1, &err);
2361 security_xfrm_policy_free(pol_ctx);
2362 if (xp == NULL)
2363 return -ENOENT;
2364
2365 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2366 audit_get_loginuid(current),
2367 audit_get_sessionid(current), 0);
2368
2369 if (err)
2370 goto out;
2371
2372 c.seq = hdr->sadb_msg_seq;
2373 c.portid = hdr->sadb_msg_pid;
2374 c.data.byid = 0;
2375 c.event = XFRM_MSG_DELPOLICY;
2376 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2377
2378out:
2379 xfrm_pol_put(xp);
2380 if (err == 0)
2381 xfrm_garbage_collect(net);
2382 return err;
2383}
2384
2385static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
2386{
2387 int err;
2388 struct sk_buff *out_skb;
2389 struct sadb_msg *out_hdr;
2390 err = 0;
2391
2392 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2393 if (IS_ERR(out_skb)) {
2394 err = PTR_ERR(out_skb);
2395 goto out;
2396 }
2397 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2398 if (err < 0)
2399 goto out;
2400
2401 out_hdr = (struct sadb_msg *) out_skb->data;
2402 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2403 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2404 out_hdr->sadb_msg_satype = 0;
2405 out_hdr->sadb_msg_errno = 0;
2406 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2407 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2408 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
2409 err = 0;
2410
2411out:
2412 return err;
2413}
2414
2415#ifdef CONFIG_NET_KEY_MIGRATE
2416static int pfkey_sockaddr_pair_size(sa_family_t family)
2417{
2418 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2419}
2420
2421static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2422 xfrm_address_t *saddr, xfrm_address_t *daddr,
2423 u16 *family)
2424{
2425 int af, socklen;
2426
2427 if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2428 return -EINVAL;
2429
2430 af = pfkey_sockaddr_extract(sa, saddr);
2431 if (!af)
2432 return -EINVAL;
2433
2434 socklen = pfkey_sockaddr_len(af);
2435 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2436 daddr) != af)
2437 return -EINVAL;
2438
2439 *family = af;
2440 return 0;
2441}
2442
2443static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2444 struct xfrm_migrate *m)
2445{
2446 int err;
2447 struct sadb_x_ipsecrequest *rq2;
2448 int mode;
2449
2450 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2451 len < rq1->sadb_x_ipsecrequest_len)
2452 return -EINVAL;
2453
2454 /* old endoints */
2455 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2456 rq1->sadb_x_ipsecrequest_len,
2457 &m->old_saddr, &m->old_daddr,
2458 &m->old_family);
2459 if (err)
2460 return err;
2461
2462 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2463 len -= rq1->sadb_x_ipsecrequest_len;
2464
2465 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2466 len < rq2->sadb_x_ipsecrequest_len)
2467 return -EINVAL;
2468
2469 /* new endpoints */
2470 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2471 rq2->sadb_x_ipsecrequest_len,
2472 &m->new_saddr, &m->new_daddr,
2473 &m->new_family);
2474 if (err)
2475 return err;
2476
2477 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2478 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2479 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2480 return -EINVAL;
2481
2482 m->proto = rq1->sadb_x_ipsecrequest_proto;
2483 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2484 return -EINVAL;
2485 m->mode = mode;
2486 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2487
2488 return ((int)(rq1->sadb_x_ipsecrequest_len +
2489 rq2->sadb_x_ipsecrequest_len));
2490}
2491
2492static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2493 const struct sadb_msg *hdr, void * const *ext_hdrs)
2494{
2495 int i, len, ret, err = -EINVAL;
2496 u8 dir;
2497 struct sadb_address *sa;
2498 struct sadb_x_kmaddress *kma;
2499 struct sadb_x_policy *pol;
2500 struct sadb_x_ipsecrequest *rq;
2501 struct xfrm_selector sel;
2502 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2503 struct xfrm_kmaddress k;
2504
2505 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2506 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2507 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2508 err = -EINVAL;
2509 goto out;
2510 }
2511
2512 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2513 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2514
2515 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2516 err = -EINVAL;
2517 goto out;
2518 }
2519
2520 if (kma) {
2521 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2522 k.reserved = kma->sadb_x_kmaddress_reserved;
2523 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2524 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2525 &k.local, &k.remote, &k.family);
2526 if (ret < 0) {
2527 err = ret;
2528 goto out;
2529 }
2530 }
2531
2532 dir = pol->sadb_x_policy_dir - 1;
2533 memset(&sel, 0, sizeof(sel));
2534
2535 /* set source address info of selector */
2536 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2537 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2538 sel.prefixlen_s = sa->sadb_address_prefixlen;
2539 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2540 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2541 if (sel.sport)
2542 sel.sport_mask = htons(0xffff);
2543
2544 /* set destination address info of selector */
2545 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2546 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2547 sel.prefixlen_d = sa->sadb_address_prefixlen;
2548 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2549 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2550 if (sel.dport)
2551 sel.dport_mask = htons(0xffff);
2552
2553 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2554
2555 /* extract ipsecrequests */
2556 i = 0;
2557 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2558
2559 while (len > 0 && i < XFRM_MAX_DEPTH) {
2560 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2561 if (ret < 0) {
2562 err = ret;
2563 goto out;
2564 } else {
2565 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2566 len -= ret;
2567 i++;
2568 }
2569 }
2570
2571 if (!i || len > 0) {
2572 err = -EINVAL;
2573 goto out;
2574 }
2575
2576 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2577 kma ? &k : NULL);
2578
2579 out:
2580 return err;
2581}
2582#else
2583static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2584 const struct sadb_msg *hdr, void * const *ext_hdrs)
2585{
2586 return -ENOPROTOOPT;
2587}
2588#endif
2589
2590
2591static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2592{
2593 struct net *net = sock_net(sk);
2594 unsigned int dir;
2595 int err = 0, delete;
2596 struct sadb_x_policy *pol;
2597 struct xfrm_policy *xp;
2598 struct km_event c;
2599
2600 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2601 return -EINVAL;
2602
2603 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2604 if (dir >= XFRM_POLICY_MAX)
2605 return -EINVAL;
2606
2607 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2608 xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2609 dir, pol->sadb_x_policy_id, delete, &err);
2610 if (xp == NULL)
2611 return -ENOENT;
2612
2613 if (delete) {
2614 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2615 audit_get_loginuid(current),
2616 audit_get_sessionid(current), 0);
2617
2618 if (err)
2619 goto out;
2620 c.seq = hdr->sadb_msg_seq;
2621 c.portid = hdr->sadb_msg_pid;
2622 c.data.byid = 1;
2623 c.event = XFRM_MSG_DELPOLICY;
2624 km_policy_notify(xp, dir, &c);
2625 } else {
2626 err = key_pol_get_resp(sk, xp, hdr, dir);
2627 }
2628
2629out:
2630 xfrm_pol_put(xp);
2631 if (delete && err == 0)
2632 xfrm_garbage_collect(net);
2633 return err;
2634}
2635
2636static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2637{
2638 struct pfkey_sock *pfk = ptr;
2639 struct sk_buff *out_skb;
2640 struct sadb_msg *out_hdr;
2641 int err;
2642
2643 if (!pfkey_can_dump(&pfk->sk))
2644 return -ENOBUFS;
2645
2646 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2647 if (IS_ERR(out_skb))
2648 return PTR_ERR(out_skb);
2649
2650 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2651 if (err < 0)
2652 return err;
2653
2654 out_hdr = (struct sadb_msg *) out_skb->data;
2655 out_hdr->sadb_msg_version = pfk->dump.msg_version;
2656 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2657 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2658 out_hdr->sadb_msg_errno = 0;
2659 out_hdr->sadb_msg_seq = count + 1;
2660 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
2661
2662 if (pfk->dump.skb)
2663 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
2664 &pfk->sk, sock_net(&pfk->sk));
2665 pfk->dump.skb = out_skb;
2666
2667 return 0;
2668}
2669
2670static int pfkey_dump_sp(struct pfkey_sock *pfk)
2671{
2672 struct net *net = sock_net(&pfk->sk);
2673 return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2674}
2675
2676static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2677{
2678 xfrm_policy_walk_done(&pfk->dump.u.policy);
2679}
2680
2681static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2682{
2683 struct pfkey_sock *pfk = pfkey_sk(sk);
2684
2685 if (pfk->dump.dump != NULL)
2686 return -EBUSY;
2687
2688 pfk->dump.msg_version = hdr->sadb_msg_version;
2689 pfk->dump.msg_portid = hdr->sadb_msg_pid;
2690 pfk->dump.dump = pfkey_dump_sp;
2691 pfk->dump.done = pfkey_dump_sp_done;
2692 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2693
2694 return pfkey_do_dump(pfk);
2695}
2696
2697static int key_notify_policy_flush(const struct km_event *c)
2698{
2699 struct sk_buff *skb_out;
2700 struct sadb_msg *hdr;
2701
2702 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2703 if (!skb_out)
2704 return -ENOBUFS;
2705 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2706 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2707 hdr->sadb_msg_seq = c->seq;
2708 hdr->sadb_msg_pid = c->portid;
2709 hdr->sadb_msg_version = PF_KEY_V2;
2710 hdr->sadb_msg_errno = (uint8_t) 0;
2711 hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2712 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2713 hdr->sadb_msg_reserved = 0;
2714 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
2715 return 0;
2716
2717}
2718
2719static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2720{
2721 struct net *net = sock_net(sk);
2722 struct km_event c;
2723 struct xfrm_audit audit_info;
2724 int err, err2;
2725
2726 audit_info.loginuid = audit_get_loginuid(current);
2727 audit_info.sessionid = audit_get_sessionid(current);
2728 audit_info.secid = 0;
2729 err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info);
2730 err2 = unicast_flush_resp(sk, hdr);
2731 if (err || err2) {
2732 if (err == -ESRCH) /* empty table - old silent behavior */
2733 return 0;
2734 return err;
2735 }
2736
2737 c.data.type = XFRM_POLICY_TYPE_MAIN;
2738 c.event = XFRM_MSG_FLUSHPOLICY;
2739 c.portid = hdr->sadb_msg_pid;
2740 c.seq = hdr->sadb_msg_seq;
2741 c.net = net;
2742 km_policy_notify(NULL, 0, &c);
2743
2744 return 0;
2745}
2746
2747typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2748 const struct sadb_msg *hdr, void * const *ext_hdrs);
2749static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2750 [SADB_RESERVED] = pfkey_reserved,
2751 [SADB_GETSPI] = pfkey_getspi,
2752 [SADB_UPDATE] = pfkey_add,
2753 [SADB_ADD] = pfkey_add,
2754 [SADB_DELETE] = pfkey_delete,
2755 [SADB_GET] = pfkey_get,
2756 [SADB_ACQUIRE] = pfkey_acquire,
2757 [SADB_REGISTER] = pfkey_register,
2758 [SADB_EXPIRE] = NULL,
2759 [SADB_FLUSH] = pfkey_flush,
2760 [SADB_DUMP] = pfkey_dump,
2761 [SADB_X_PROMISC] = pfkey_promisc,
2762 [SADB_X_PCHANGE] = NULL,
2763 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2764 [SADB_X_SPDADD] = pfkey_spdadd,
2765 [SADB_X_SPDDELETE] = pfkey_spddelete,
2766 [SADB_X_SPDGET] = pfkey_spdget,
2767 [SADB_X_SPDACQUIRE] = NULL,
2768 [SADB_X_SPDDUMP] = pfkey_spddump,
2769 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2770 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2771 [SADB_X_SPDDELETE2] = pfkey_spdget,
2772 [SADB_X_MIGRATE] = pfkey_migrate,
2773};
2774
2775static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
2776{
2777 void *ext_hdrs[SADB_EXT_MAX];
2778 int err;
2779
2780 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2781 BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
2782
2783 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2784 err = parse_exthdrs(skb, hdr, ext_hdrs);
2785 if (!err) {
2786 err = -EOPNOTSUPP;
2787 if (pfkey_funcs[hdr->sadb_msg_type])
2788 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2789 }
2790 return err;
2791}
2792
2793static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2794{
2795 struct sadb_msg *hdr = NULL;
2796
2797 if (skb->len < sizeof(*hdr)) {
2798 *errp = -EMSGSIZE;
2799 } else {
2800 hdr = (struct sadb_msg *) skb->data;
2801 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2802 hdr->sadb_msg_reserved != 0 ||
2803 (hdr->sadb_msg_type <= SADB_RESERVED ||
2804 hdr->sadb_msg_type > SADB_MAX)) {
2805 hdr = NULL;
2806 *errp = -EINVAL;
2807 } else if (hdr->sadb_msg_len != (skb->len /
2808 sizeof(uint64_t)) ||
2809 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2810 sizeof(uint64_t))) {
2811 hdr = NULL;
2812 *errp = -EMSGSIZE;
2813 } else {
2814 *errp = 0;
2815 }
2816 }
2817 return hdr;
2818}
2819
2820static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2821 const struct xfrm_algo_desc *d)
2822{
2823 unsigned int id = d->desc.sadb_alg_id;
2824
2825 if (id >= sizeof(t->aalgos) * 8)
2826 return 0;
2827
2828 return (t->aalgos >> id) & 1;
2829}
2830
2831static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2832 const struct xfrm_algo_desc *d)
2833{
2834 unsigned int id = d->desc.sadb_alg_id;
2835
2836 if (id >= sizeof(t->ealgos) * 8)
2837 return 0;
2838
2839 return (t->ealgos >> id) & 1;
2840}
2841
2842static int count_ah_combs(const struct xfrm_tmpl *t)
2843{
2844 int i, sz = 0;
2845
2846 for (i = 0; ; i++) {
2847 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2848 if (!aalg)
2849 break;
2850 if (!aalg->pfkey_supported)
2851 continue;
2852 if (aalg_tmpl_set(t, aalg) && aalg->available)
2853 sz += sizeof(struct sadb_comb);
2854 }
2855 return sz + sizeof(struct sadb_prop);
2856}
2857
2858static int count_esp_combs(const struct xfrm_tmpl *t)
2859{
2860 int i, k, sz = 0;
2861
2862 for (i = 0; ; i++) {
2863 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2864 if (!ealg)
2865 break;
2866
2867 if (!ealg->pfkey_supported)
2868 continue;
2869
2870 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2871 continue;
2872
2873 for (k = 1; ; k++) {
2874 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2875 if (!aalg)
2876 break;
2877
2878 if (!aalg->pfkey_supported)
2879 continue;
2880
2881 if (aalg_tmpl_set(t, aalg) && aalg->available)
2882 sz += sizeof(struct sadb_comb);
2883 }
2884 }
2885 return sz + sizeof(struct sadb_prop);
2886}
2887
2888static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2889{
2890 struct sadb_prop *p;
2891 int i;
2892
2893 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2894 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2895 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2896 p->sadb_prop_replay = 32;
2897 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2898
2899 for (i = 0; ; i++) {
2900 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2901 if (!aalg)
2902 break;
2903
2904 if (!aalg->pfkey_supported)
2905 continue;
2906
2907 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2908 struct sadb_comb *c;
2909 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2910 memset(c, 0, sizeof(*c));
2911 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2912 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2913 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2914 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2915 c->sadb_comb_hard_addtime = 24*60*60;
2916 c->sadb_comb_soft_addtime = 20*60*60;
2917 c->sadb_comb_hard_usetime = 8*60*60;
2918 c->sadb_comb_soft_usetime = 7*60*60;
2919 }
2920 }
2921}
2922
2923static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2924{
2925 struct sadb_prop *p;
2926 int i, k;
2927
2928 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2929 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2930 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2931 p->sadb_prop_replay = 32;
2932 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2933
2934 for (i=0; ; i++) {
2935 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2936 if (!ealg)
2937 break;
2938
2939 if (!ealg->pfkey_supported)
2940 continue;
2941
2942 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2943 continue;
2944
2945 for (k = 1; ; k++) {
2946 struct sadb_comb *c;
2947 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2948 if (!aalg)
2949 break;
2950 if (!aalg->pfkey_supported)
2951 continue;
2952 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2953 continue;
2954 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2955 memset(c, 0, sizeof(*c));
2956 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2957 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2958 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2959 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2960 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2961 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2962 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2963 c->sadb_comb_hard_addtime = 24*60*60;
2964 c->sadb_comb_soft_addtime = 20*60*60;
2965 c->sadb_comb_hard_usetime = 8*60*60;
2966 c->sadb_comb_soft_usetime = 7*60*60;
2967 }
2968 }
2969}
2970
2971static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
2972{
2973 return 0;
2974}
2975
2976static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
2977{
2978 struct sk_buff *out_skb;
2979 struct sadb_msg *out_hdr;
2980 int hard;
2981 int hsc;
2982
2983 hard = c->data.hard;
2984 if (hard)
2985 hsc = 2;
2986 else
2987 hsc = 1;
2988
2989 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
2990 if (IS_ERR(out_skb))
2991 return PTR_ERR(out_skb);
2992
2993 out_hdr = (struct sadb_msg *) out_skb->data;
2994 out_hdr->sadb_msg_version = PF_KEY_V2;
2995 out_hdr->sadb_msg_type = SADB_EXPIRE;
2996 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2997 out_hdr->sadb_msg_errno = 0;
2998 out_hdr->sadb_msg_reserved = 0;
2999 out_hdr->sadb_msg_seq = 0;
3000 out_hdr->sadb_msg_pid = 0;
3001
3002 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
3003 return 0;
3004}
3005
3006static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
3007{
3008 struct net *net = x ? xs_net(x) : c->net;
3009 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3010
3011 if (atomic_read(&net_pfkey->socks_nr) == 0)
3012 return 0;
3013
3014 switch (c->event) {
3015 case XFRM_MSG_EXPIRE:
3016 return key_notify_sa_expire(x, c);
3017 case XFRM_MSG_DELSA:
3018 case XFRM_MSG_NEWSA:
3019 case XFRM_MSG_UPDSA:
3020 return key_notify_sa(x, c);
3021 case XFRM_MSG_FLUSHSA:
3022 return key_notify_sa_flush(c);
3023 case XFRM_MSG_NEWAE: /* not yet supported */
3024 break;
3025 default:
3026 pr_err("pfkey: Unknown SA event %d\n", c->event);
3027 break;
3028 }
3029
3030 return 0;
3031}
3032
3033static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3034{
3035 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3036 return 0;
3037
3038 switch (c->event) {
3039 case XFRM_MSG_POLEXPIRE:
3040 return key_notify_policy_expire(xp, c);
3041 case XFRM_MSG_DELPOLICY:
3042 case XFRM_MSG_NEWPOLICY:
3043 case XFRM_MSG_UPDPOLICY:
3044 return key_notify_policy(xp, dir, c);
3045 case XFRM_MSG_FLUSHPOLICY:
3046 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3047 break;
3048 return key_notify_policy_flush(c);
3049 default:
3050 pr_err("pfkey: Unknown policy event %d\n", c->event);
3051 break;
3052 }
3053
3054 return 0;
3055}
3056
3057static u32 get_acqseq(void)
3058{
3059 u32 res;
3060 static atomic_t acqseq;
3061
3062 do {
3063 res = atomic_inc_return(&acqseq);
3064 } while (!res);
3065 return res;
3066}
3067
3068static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
3069{
3070 struct sk_buff *skb;
3071 struct sadb_msg *hdr;
3072 struct sadb_address *addr;
3073 struct sadb_x_policy *pol;
3074 int sockaddr_size;
3075 int size;
3076 struct sadb_x_sec_ctx *sec_ctx;
3077 struct xfrm_sec_ctx *xfrm_ctx;
3078 int ctx_size = 0;
3079
3080 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3081 if (!sockaddr_size)
3082 return -EINVAL;
3083
3084 size = sizeof(struct sadb_msg) +
3085 (sizeof(struct sadb_address) * 2) +
3086 (sockaddr_size * 2) +
3087 sizeof(struct sadb_x_policy);
3088
3089 if (x->id.proto == IPPROTO_AH)
3090 size += count_ah_combs(t);
3091 else if (x->id.proto == IPPROTO_ESP)
3092 size += count_esp_combs(t);
3093
3094 if ((xfrm_ctx = x->security)) {
3095 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3096 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3097 }
3098
3099 skb = alloc_skb(size + 16, GFP_ATOMIC);
3100 if (skb == NULL)
3101 return -ENOMEM;
3102
3103 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3104 hdr->sadb_msg_version = PF_KEY_V2;
3105 hdr->sadb_msg_type = SADB_ACQUIRE;
3106 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3107 hdr->sadb_msg_len = size / sizeof(uint64_t);
3108 hdr->sadb_msg_errno = 0;
3109 hdr->sadb_msg_reserved = 0;
3110 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3111 hdr->sadb_msg_pid = 0;
3112
3113 /* src address */
3114 addr = (struct sadb_address*) skb_put(skb,
3115 sizeof(struct sadb_address)+sockaddr_size);
3116 addr->sadb_address_len =
3117 (sizeof(struct sadb_address)+sockaddr_size)/
3118 sizeof(uint64_t);
3119 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3120 addr->sadb_address_proto = 0;
3121 addr->sadb_address_reserved = 0;
3122 addr->sadb_address_prefixlen =
3123 pfkey_sockaddr_fill(&x->props.saddr, 0,
3124 (struct sockaddr *) (addr + 1),
3125 x->props.family);
3126 if (!addr->sadb_address_prefixlen)
3127 BUG();
3128
3129 /* dst address */
3130 addr = (struct sadb_address*) skb_put(skb,
3131 sizeof(struct sadb_address)+sockaddr_size);
3132 addr->sadb_address_len =
3133 (sizeof(struct sadb_address)+sockaddr_size)/
3134 sizeof(uint64_t);
3135 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3136 addr->sadb_address_proto = 0;
3137 addr->sadb_address_reserved = 0;
3138 addr->sadb_address_prefixlen =
3139 pfkey_sockaddr_fill(&x->id.daddr, 0,
3140 (struct sockaddr *) (addr + 1),
3141 x->props.family);
3142 if (!addr->sadb_address_prefixlen)
3143 BUG();
3144
3145 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3146 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3147 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3148 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3149 pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
3150 pol->sadb_x_policy_reserved = 0;
3151 pol->sadb_x_policy_id = xp->index;
3152 pol->sadb_x_policy_priority = xp->priority;
3153
3154 /* Set sadb_comb's. */
3155 if (x->id.proto == IPPROTO_AH)
3156 dump_ah_combs(skb, t);
3157 else if (x->id.proto == IPPROTO_ESP)
3158 dump_esp_combs(skb, t);
3159
3160 /* security context */
3161 if (xfrm_ctx) {
3162 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3163 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3164 sec_ctx->sadb_x_sec_len =
3165 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3166 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3167 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3168 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3169 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3170 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3171 xfrm_ctx->ctx_len);
3172 }
3173
3174 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
3175}
3176
3177static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3178 u8 *data, int len, int *dir)
3179{
3180 struct net *net = sock_net(sk);
3181 struct xfrm_policy *xp;
3182 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3183 struct sadb_x_sec_ctx *sec_ctx;
3184
3185 switch (sk->sk_family) {
3186 case AF_INET:
3187 if (opt != IP_IPSEC_POLICY) {
3188 *dir = -EOPNOTSUPP;
3189 return NULL;
3190 }
3191 break;
3192#if IS_ENABLED(CONFIG_IPV6)
3193 case AF_INET6:
3194 if (opt != IPV6_IPSEC_POLICY) {
3195 *dir = -EOPNOTSUPP;
3196 return NULL;
3197 }
3198 break;
3199#endif
3200 default:
3201 *dir = -EINVAL;
3202 return NULL;
3203 }
3204
3205 *dir = -EINVAL;
3206
3207 if (len < sizeof(struct sadb_x_policy) ||
3208 pol->sadb_x_policy_len*8 > len ||
3209 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3210 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3211 return NULL;
3212
3213 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3214 if (xp == NULL) {
3215 *dir = -ENOBUFS;
3216 return NULL;
3217 }
3218
3219 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3220 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3221
3222 xp->lft.soft_byte_limit = XFRM_INF;
3223 xp->lft.hard_byte_limit = XFRM_INF;
3224 xp->lft.soft_packet_limit = XFRM_INF;
3225 xp->lft.hard_packet_limit = XFRM_INF;
3226 xp->family = sk->sk_family;
3227
3228 xp->xfrm_nr = 0;
3229 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3230 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3231 goto out;
3232
3233 /* security context too */
3234 if (len >= (pol->sadb_x_policy_len*8 +
3235 sizeof(struct sadb_x_sec_ctx))) {
3236 char *p = (char *)pol;
3237 struct xfrm_user_sec_ctx *uctx;
3238
3239 p += pol->sadb_x_policy_len*8;
3240 sec_ctx = (struct sadb_x_sec_ctx *)p;
3241 if (len < pol->sadb_x_policy_len*8 +
3242 sec_ctx->sadb_x_sec_len) {
3243 *dir = -EINVAL;
3244 goto out;
3245 }
3246 if ((*dir = verify_sec_ctx_len(p)))
3247 goto out;
3248 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3249 *dir = security_xfrm_policy_alloc(&xp->security, uctx);
3250 kfree(uctx);
3251
3252 if (*dir)
3253 goto out;
3254 }
3255
3256 *dir = pol->sadb_x_policy_dir-1;
3257 return xp;
3258
3259out:
3260 xp->walk.dead = 1;
3261 xfrm_policy_destroy(xp);
3262 return NULL;
3263}
3264
3265static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3266{
3267 struct sk_buff *skb;
3268 struct sadb_msg *hdr;
3269 struct sadb_sa *sa;
3270 struct sadb_address *addr;
3271 struct sadb_x_nat_t_port *n_port;
3272 int sockaddr_size;
3273 int size;
3274 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3275 struct xfrm_encap_tmpl *natt = NULL;
3276
3277 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3278 if (!sockaddr_size)
3279 return -EINVAL;
3280
3281 if (!satype)
3282 return -EINVAL;
3283
3284 if (!x->encap)
3285 return -EINVAL;
3286
3287 natt = x->encap;
3288
3289 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3290 *
3291 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3292 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3293 */
3294
3295 size = sizeof(struct sadb_msg) +
3296 sizeof(struct sadb_sa) +
3297 (sizeof(struct sadb_address) * 2) +
3298 (sockaddr_size * 2) +
3299 (sizeof(struct sadb_x_nat_t_port) * 2);
3300
3301 skb = alloc_skb(size + 16, GFP_ATOMIC);
3302 if (skb == NULL)
3303 return -ENOMEM;
3304
3305 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3306 hdr->sadb_msg_version = PF_KEY_V2;
3307 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3308 hdr->sadb_msg_satype = satype;
3309 hdr->sadb_msg_len = size / sizeof(uint64_t);
3310 hdr->sadb_msg_errno = 0;
3311 hdr->sadb_msg_reserved = 0;
3312 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3313 hdr->sadb_msg_pid = 0;
3314
3315 /* SA */
3316 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3317 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3318 sa->sadb_sa_exttype = SADB_EXT_SA;
3319 sa->sadb_sa_spi = x->id.spi;
3320 sa->sadb_sa_replay = 0;
3321 sa->sadb_sa_state = 0;
3322 sa->sadb_sa_auth = 0;
3323 sa->sadb_sa_encrypt = 0;
3324 sa->sadb_sa_flags = 0;
3325
3326 /* ADDRESS_SRC (old addr) */
3327 addr = (struct sadb_address*)
3328 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3329 addr->sadb_address_len =
3330 (sizeof(struct sadb_address)+sockaddr_size)/
3331 sizeof(uint64_t);
3332 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3333 addr->sadb_address_proto = 0;
3334 addr->sadb_address_reserved = 0;
3335 addr->sadb_address_prefixlen =
3336 pfkey_sockaddr_fill(&x->props.saddr, 0,
3337 (struct sockaddr *) (addr + 1),
3338 x->props.family);
3339 if (!addr->sadb_address_prefixlen)
3340 BUG();
3341
3342 /* NAT_T_SPORT (old port) */
3343 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3344 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3345 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3346 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3347 n_port->sadb_x_nat_t_port_reserved = 0;
3348
3349 /* ADDRESS_DST (new addr) */
3350 addr = (struct sadb_address*)
3351 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3352 addr->sadb_address_len =
3353 (sizeof(struct sadb_address)+sockaddr_size)/
3354 sizeof(uint64_t);
3355 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3356 addr->sadb_address_proto = 0;
3357 addr->sadb_address_reserved = 0;
3358 addr->sadb_address_prefixlen =
3359 pfkey_sockaddr_fill(ipaddr, 0,
3360 (struct sockaddr *) (addr + 1),
3361 x->props.family);
3362 if (!addr->sadb_address_prefixlen)
3363 BUG();
3364
3365 /* NAT_T_DPORT (new port) */
3366 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3367 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3368 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3369 n_port->sadb_x_nat_t_port_port = sport;
3370 n_port->sadb_x_nat_t_port_reserved = 0;
3371
3372 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
3373}
3374
3375#ifdef CONFIG_NET_KEY_MIGRATE
3376static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3377 const struct xfrm_selector *sel)
3378{
3379 struct sadb_address *addr;
3380 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3381 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3382 addr->sadb_address_exttype = type;
3383 addr->sadb_address_proto = sel->proto;
3384 addr->sadb_address_reserved = 0;
3385
3386 switch (type) {
3387 case SADB_EXT_ADDRESS_SRC:
3388 addr->sadb_address_prefixlen = sel->prefixlen_s;
3389 pfkey_sockaddr_fill(&sel->saddr, 0,
3390 (struct sockaddr *)(addr + 1),
3391 sel->family);
3392 break;
3393 case SADB_EXT_ADDRESS_DST:
3394 addr->sadb_address_prefixlen = sel->prefixlen_d;
3395 pfkey_sockaddr_fill(&sel->daddr, 0,
3396 (struct sockaddr *)(addr + 1),
3397 sel->family);
3398 break;
3399 default:
3400 return -EINVAL;
3401 }
3402
3403 return 0;
3404}
3405
3406
3407static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
3408{
3409 struct sadb_x_kmaddress *kma;
3410 u8 *sa;
3411 int family = k->family;
3412 int socklen = pfkey_sockaddr_len(family);
3413 int size_req;
3414
3415 size_req = (sizeof(struct sadb_x_kmaddress) +
3416 pfkey_sockaddr_pair_size(family));
3417
3418 kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req);
3419 memset(kma, 0, size_req);
3420 kma->sadb_x_kmaddress_len = size_req / 8;
3421 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3422 kma->sadb_x_kmaddress_reserved = k->reserved;
3423
3424 sa = (u8 *)(kma + 1);
3425 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3426 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3427 return -EINVAL;
3428
3429 return 0;
3430}
3431
3432static int set_ipsecrequest(struct sk_buff *skb,
3433 uint8_t proto, uint8_t mode, int level,
3434 uint32_t reqid, uint8_t family,
3435 const xfrm_address_t *src, const xfrm_address_t *dst)
3436{
3437 struct sadb_x_ipsecrequest *rq;
3438 u8 *sa;
3439 int socklen = pfkey_sockaddr_len(family);
3440 int size_req;
3441
3442 size_req = sizeof(struct sadb_x_ipsecrequest) +
3443 pfkey_sockaddr_pair_size(family);
3444
3445 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3446 memset(rq, 0, size_req);
3447 rq->sadb_x_ipsecrequest_len = size_req;
3448 rq->sadb_x_ipsecrequest_proto = proto;
3449 rq->sadb_x_ipsecrequest_mode = mode;
3450 rq->sadb_x_ipsecrequest_level = level;
3451 rq->sadb_x_ipsecrequest_reqid = reqid;
3452
3453 sa = (u8 *) (rq + 1);
3454 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3455 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3456 return -EINVAL;
3457
3458 return 0;
3459}
3460#endif
3461
3462#ifdef CONFIG_NET_KEY_MIGRATE
3463static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3464 const struct xfrm_migrate *m, int num_bundles,
3465 const struct xfrm_kmaddress *k)
3466{
3467 int i;
3468 int sasize_sel;
3469 int size = 0;
3470 int size_pol = 0;
3471 struct sk_buff *skb;
3472 struct sadb_msg *hdr;
3473 struct sadb_x_policy *pol;
3474 const struct xfrm_migrate *mp;
3475
3476 if (type != XFRM_POLICY_TYPE_MAIN)
3477 return 0;
3478
3479 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3480 return -EINVAL;
3481
3482 if (k != NULL) {
3483 /* addresses for KM */
3484 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3485 pfkey_sockaddr_pair_size(k->family));
3486 }
3487
3488 /* selector */
3489 sasize_sel = pfkey_sockaddr_size(sel->family);
3490 if (!sasize_sel)
3491 return -EINVAL;
3492 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3493
3494 /* policy info */
3495 size_pol += sizeof(struct sadb_x_policy);
3496
3497 /* ipsecrequests */
3498 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3499 /* old locator pair */
3500 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3501 pfkey_sockaddr_pair_size(mp->old_family);
3502 /* new locator pair */
3503 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3504 pfkey_sockaddr_pair_size(mp->new_family);
3505 }
3506
3507 size += sizeof(struct sadb_msg) + size_pol;
3508
3509 /* alloc buffer */
3510 skb = alloc_skb(size, GFP_ATOMIC);
3511 if (skb == NULL)
3512 return -ENOMEM;
3513
3514 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3515 hdr->sadb_msg_version = PF_KEY_V2;
3516 hdr->sadb_msg_type = SADB_X_MIGRATE;
3517 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3518 hdr->sadb_msg_len = size / 8;
3519 hdr->sadb_msg_errno = 0;
3520 hdr->sadb_msg_reserved = 0;
3521 hdr->sadb_msg_seq = 0;
3522 hdr->sadb_msg_pid = 0;
3523
3524 /* Addresses to be used by KM for negotiation, if ext is available */
3525 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3526 goto err;
3527
3528 /* selector src */
3529 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3530
3531 /* selector dst */
3532 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3533
3534 /* policy information */
3535 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3536 pol->sadb_x_policy_len = size_pol / 8;
3537 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3538 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3539 pol->sadb_x_policy_dir = dir + 1;
3540 pol->sadb_x_policy_reserved = 0;
3541 pol->sadb_x_policy_id = 0;
3542 pol->sadb_x_policy_priority = 0;
3543
3544 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3545 /* old ipsecrequest */
3546 int mode = pfkey_mode_from_xfrm(mp->mode);
3547 if (mode < 0)
3548 goto err;
3549 if (set_ipsecrequest(skb, mp->proto, mode,
3550 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3551 mp->reqid, mp->old_family,
3552 &mp->old_saddr, &mp->old_daddr) < 0)
3553 goto err;
3554
3555 /* new ipsecrequest */
3556 if (set_ipsecrequest(skb, mp->proto, mode,
3557 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3558 mp->reqid, mp->new_family,
3559 &mp->new_saddr, &mp->new_daddr) < 0)
3560 goto err;
3561 }
3562
3563 /* broadcast migrate message to sockets */
3564 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
3565
3566 return 0;
3567
3568err:
3569 kfree_skb(skb);
3570 return -EINVAL;
3571}
3572#else
3573static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3574 const struct xfrm_migrate *m, int num_bundles,
3575 const struct xfrm_kmaddress *k)
3576{
3577 return -ENOPROTOOPT;
3578}
3579#endif
3580
3581static int pfkey_sendmsg(struct kiocb *kiocb,
3582 struct socket *sock, struct msghdr *msg, size_t len)
3583{
3584 struct sock *sk = sock->sk;
3585 struct sk_buff *skb = NULL;
3586 struct sadb_msg *hdr = NULL;
3587 int err;
3588
3589 err = -EOPNOTSUPP;
3590 if (msg->msg_flags & MSG_OOB)
3591 goto out;
3592
3593 err = -EMSGSIZE;
3594 if ((unsigned int)len > sk->sk_sndbuf - 32)
3595 goto out;
3596
3597 err = -ENOBUFS;
3598 skb = alloc_skb(len, GFP_KERNEL);
3599 if (skb == NULL)
3600 goto out;
3601
3602 err = -EFAULT;
3603 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3604 goto out;
3605
3606 hdr = pfkey_get_base_msg(skb, &err);
3607 if (!hdr)
3608 goto out;
3609
3610 mutex_lock(&xfrm_cfg_mutex);
3611 err = pfkey_process(sk, skb, hdr);
3612 mutex_unlock(&xfrm_cfg_mutex);
3613
3614out:
3615 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3616 err = 0;
3617 kfree_skb(skb);
3618
3619 return err ? : len;
3620}
3621
3622static int pfkey_recvmsg(struct kiocb *kiocb,
3623 struct socket *sock, struct msghdr *msg, size_t len,
3624 int flags)
3625{
3626 struct sock *sk = sock->sk;
3627 struct pfkey_sock *pfk = pfkey_sk(sk);
3628 struct sk_buff *skb;
3629 int copied, err;
3630
3631 err = -EINVAL;
3632 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3633 goto out;
3634
3635 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3636 if (skb == NULL)
3637 goto out;
3638
3639 copied = skb->len;
3640 if (copied > len) {
3641 msg->msg_flags |= MSG_TRUNC;
3642 copied = len;
3643 }
3644
3645 skb_reset_transport_header(skb);
3646 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3647 if (err)
3648 goto out_free;
3649
3650 sock_recv_ts_and_drops(msg, sk, skb);
3651
3652 err = (flags & MSG_TRUNC) ? skb->len : copied;
3653
3654 if (pfk->dump.dump != NULL &&
3655 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3656 pfkey_do_dump(pfk);
3657
3658out_free:
3659 skb_free_datagram(sk, skb);
3660out:
3661 return err;
3662}
3663
3664static const struct proto_ops pfkey_ops = {
3665 .family = PF_KEY,
3666 .owner = THIS_MODULE,
3667 /* Operations that make no sense on pfkey sockets. */
3668 .bind = sock_no_bind,
3669 .connect = sock_no_connect,
3670 .socketpair = sock_no_socketpair,
3671 .accept = sock_no_accept,
3672 .getname = sock_no_getname,
3673 .ioctl = sock_no_ioctl,
3674 .listen = sock_no_listen,
3675 .shutdown = sock_no_shutdown,
3676 .setsockopt = sock_no_setsockopt,
3677 .getsockopt = sock_no_getsockopt,
3678 .mmap = sock_no_mmap,
3679 .sendpage = sock_no_sendpage,
3680
3681 /* Now the operations that really occur. */
3682 .release = pfkey_release,
3683 .poll = datagram_poll,
3684 .sendmsg = pfkey_sendmsg,
3685 .recvmsg = pfkey_recvmsg,
3686};
3687
3688static const struct net_proto_family pfkey_family_ops = {
3689 .family = PF_KEY,
3690 .create = pfkey_create,
3691 .owner = THIS_MODULE,
3692};
3693
3694#ifdef CONFIG_PROC_FS
3695static int pfkey_seq_show(struct seq_file *f, void *v)
3696{
3697 struct sock *s = sk_entry(v);
3698
3699 if (v == SEQ_START_TOKEN)
3700 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3701 else
3702 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
3703 s,
3704 atomic_read(&s->sk_refcnt),
3705 sk_rmem_alloc_get(s),
3706 sk_wmem_alloc_get(s),
3707 from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
3708 sock_i_ino(s)
3709 );
3710 return 0;
3711}
3712
3713static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3714 __acquires(rcu)
3715{
3716 struct net *net = seq_file_net(f);
3717 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3718
3719 rcu_read_lock();
3720 return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
3721}
3722
3723static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3724{
3725 struct net *net = seq_file_net(f);
3726 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3727
3728 return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
3729}
3730
3731static void pfkey_seq_stop(struct seq_file *f, void *v)
3732 __releases(rcu)
3733{
3734 rcu_read_unlock();
3735}
3736
3737static const struct seq_operations pfkey_seq_ops = {
3738 .start = pfkey_seq_start,
3739 .next = pfkey_seq_next,
3740 .stop = pfkey_seq_stop,
3741 .show = pfkey_seq_show,
3742};
3743
3744static int pfkey_seq_open(struct inode *inode, struct file *file)
3745{
3746 return seq_open_net(inode, file, &pfkey_seq_ops,
3747 sizeof(struct seq_net_private));
3748}
3749
3750static const struct file_operations pfkey_proc_ops = {
3751 .open = pfkey_seq_open,
3752 .read = seq_read,
3753 .llseek = seq_lseek,
3754 .release = seq_release_net,
3755};
3756
3757static int __net_init pfkey_init_proc(struct net *net)
3758{
3759 struct proc_dir_entry *e;
3760
3761 e = proc_create("pfkey", 0, net->proc_net, &pfkey_proc_ops);
3762 if (e == NULL)
3763 return -ENOMEM;
3764
3765 return 0;
3766}
3767
3768static void __net_exit pfkey_exit_proc(struct net *net)
3769{
3770 remove_proc_entry("pfkey", net->proc_net);
3771}
3772#else
3773static inline int pfkey_init_proc(struct net *net)
3774{
3775 return 0;
3776}
3777
3778static inline void pfkey_exit_proc(struct net *net)
3779{
3780}
3781#endif
3782
3783static struct xfrm_mgr pfkeyv2_mgr =
3784{
3785 .id = "pfkeyv2",
3786 .notify = pfkey_send_notify,
3787 .acquire = pfkey_send_acquire,
3788 .compile_policy = pfkey_compile_policy,
3789 .new_mapping = pfkey_send_new_mapping,
3790 .notify_policy = pfkey_send_policy_notify,
3791 .migrate = pfkey_send_migrate,
3792};
3793
3794static int __net_init pfkey_net_init(struct net *net)
3795{
3796 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3797 int rv;
3798
3799 INIT_HLIST_HEAD(&net_pfkey->table);
3800 atomic_set(&net_pfkey->socks_nr, 0);
3801
3802 rv = pfkey_init_proc(net);
3803
3804 return rv;
3805}
3806
3807static void __net_exit pfkey_net_exit(struct net *net)
3808{
3809 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3810
3811 pfkey_exit_proc(net);
3812 BUG_ON(!hlist_empty(&net_pfkey->table));
3813}
3814
3815static struct pernet_operations pfkey_net_ops = {
3816 .init = pfkey_net_init,
3817 .exit = pfkey_net_exit,
3818 .id = &pfkey_net_id,
3819 .size = sizeof(struct netns_pfkey),
3820};
3821
3822static void __exit ipsec_pfkey_exit(void)
3823{
3824 xfrm_unregister_km(&pfkeyv2_mgr);
3825 sock_unregister(PF_KEY);
3826 unregister_pernet_subsys(&pfkey_net_ops);
3827 proto_unregister(&key_proto);
3828}
3829
3830static int __init ipsec_pfkey_init(void)
3831{
3832 int err = proto_register(&key_proto, 0);
3833
3834 if (err != 0)
3835 goto out;
3836
3837 err = register_pernet_subsys(&pfkey_net_ops);
3838 if (err != 0)
3839 goto out_unregister_key_proto;
3840 err = sock_register(&pfkey_family_ops);
3841 if (err != 0)
3842 goto out_unregister_pernet;
3843 err = xfrm_register_km(&pfkeyv2_mgr);
3844 if (err != 0)
3845 goto out_sock_unregister;
3846out:
3847 return err;
3848
3849out_sock_unregister:
3850 sock_unregister(PF_KEY);
3851out_unregister_pernet:
3852 unregister_pernet_subsys(&pfkey_net_ops);
3853out_unregister_key_proto:
3854 proto_unregister(&key_proto);
3855 goto out;
3856}
3857
3858module_init(ipsec_pfkey_init);
3859module_exit(ipsec_pfkey_exit);
3860MODULE_LICENSE("GPL");
3861MODULE_ALIAS_NETPROTO(PF_KEY);
kernel source for telekom puls (alcatel/mediatek)