1 /* 2 * net/key/af_key.c An implementation of PF_KEYv2 sockets. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 * 9 * Authors: Maxim Giryaev <gem@asplinux.ru> 10 * David S. Miller <davem@redhat.com> 11 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> 12 * Kunihiro Ishiguro <kunihiro@ipinfusion.com> 13 * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org> 14 * Derek Atkins <derek@ihtfp.com> 15 */ 16 17 #include <linux/config.h> 18 #include <linux/module.h> 19 #include <linux/kernel.h> 20 #include <linux/socket.h> 21 #include <linux/pfkeyv2.h> 22 #include <linux/ipsec.h> 23 #include <linux/skbuff.h> 24 #include <linux/rtnetlink.h> 25 #include <linux/in.h> 26 #include <linux/in6.h> 27 #include <linux/proc_fs.h> 28 #include <linux/init.h> 29 #include <net/xfrm.h> 30 31 #include <net/sock.h> 32 33 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x)) 34 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x)) 35 36 37 /* List of all pfkey sockets. */ 38 static HLIST_HEAD(pfkey_table); 39 static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait); 40 static DEFINE_RWLOCK(pfkey_table_lock); 41 static atomic_t pfkey_table_users = ATOMIC_INIT(0); 42 43 static atomic_t pfkey_socks_nr = ATOMIC_INIT(0); 44 45 struct pfkey_sock { 46 /* struct sock must be the first member of struct pfkey_sock */ 47 struct sock sk; 48 int registered; 49 int promisc; 50 }; 51 52 static inline struct pfkey_sock *pfkey_sk(struct sock *sk) 53 { 54 return (struct pfkey_sock *)sk; 55 } 56 57 static void pfkey_sock_destruct(struct sock *sk) 58 { 59 skb_queue_purge(&sk->sk_receive_queue); 60 61 if (!sock_flag(sk, SOCK_DEAD)) { 62 printk("Attempt to release alive pfkey socket: %p\n", sk); 63 return; 64 } 65 66 BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc)); 67 BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc)); 68 69 atomic_dec(&pfkey_socks_nr); 70 } 71 72 static void pfkey_table_grab(void) 73 { 74 write_lock_bh(&pfkey_table_lock); 75 76 if (atomic_read(&pfkey_table_users)) { 77 DECLARE_WAITQUEUE(wait, current); 78 79 add_wait_queue_exclusive(&pfkey_table_wait, &wait); 80 for(;;) { 81 set_current_state(TASK_UNINTERRUPTIBLE); 82 if (atomic_read(&pfkey_table_users) == 0) 83 break; 84 write_unlock_bh(&pfkey_table_lock); 85 schedule(); 86 write_lock_bh(&pfkey_table_lock); 87 } 88 89 __set_current_state(TASK_RUNNING); 90 remove_wait_queue(&pfkey_table_wait, &wait); 91 } 92 } 93 94 static __inline__ void pfkey_table_ungrab(void) 95 { 96 write_unlock_bh(&pfkey_table_lock); 97 wake_up(&pfkey_table_wait); 98 } 99 100 static __inline__ void pfkey_lock_table(void) 101 { 102 /* read_lock() synchronizes us to pfkey_table_grab */ 103 104 read_lock(&pfkey_table_lock); 105 atomic_inc(&pfkey_table_users); 106 read_unlock(&pfkey_table_lock); 107 } 108 109 static __inline__ void pfkey_unlock_table(void) 110 { 111 if (atomic_dec_and_test(&pfkey_table_users)) 112 wake_up(&pfkey_table_wait); 113 } 114 115 116 static struct proto_ops pfkey_ops; 117 118 static void pfkey_insert(struct sock *sk) 119 { 120 pfkey_table_grab(); 121 sk_add_node(sk, &pfkey_table); 122 pfkey_table_ungrab(); 123 } 124 125 static void pfkey_remove(struct sock *sk) 126 { 127 pfkey_table_grab(); 128 sk_del_node_init(sk); 129 pfkey_table_ungrab(); 130 } 131 132 static struct proto key_proto = { 133 .name = "KEY", 134 .owner = THIS_MODULE, 135 .obj_size = sizeof(struct pfkey_sock), 136 }; 137 138 static int pfkey_create(struct socket *sock, int protocol) 139 { 140 struct sock *sk; 141 int err; 142 143 if (!capable(CAP_NET_ADMIN)) 144 return -EPERM; 145 if (sock->type != SOCK_RAW) 146 return -ESOCKTNOSUPPORT; 147 if (protocol != PF_KEY_V2) 148 return -EPROTONOSUPPORT; 149 150 err = -ENOMEM; 151 sk = sk_alloc(PF_KEY, GFP_KERNEL, &key_proto, 1); 152 if (sk == NULL) 153 goto out; 154 155 sock->ops = &pfkey_ops; 156 sock_init_data(sock, sk); 157 158 sk->sk_family = PF_KEY; 159 sk->sk_destruct = pfkey_sock_destruct; 160 161 atomic_inc(&pfkey_socks_nr); 162 163 pfkey_insert(sk); 164 165 return 0; 166 out: 167 return err; 168 } 169 170 static int pfkey_release(struct socket *sock) 171 { 172 struct sock *sk = sock->sk; 173 174 if (!sk) 175 return 0; 176 177 pfkey_remove(sk); 178 179 sock_orphan(sk); 180 sock->sk = NULL; 181 skb_queue_purge(&sk->sk_write_queue); 182 sock_put(sk); 183 184 return 0; 185 } 186 187 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2, 188 int allocation, struct sock *sk) 189 { 190 int err = -ENOBUFS; 191 192 sock_hold(sk); 193 if (*skb2 == NULL) { 194 if (atomic_read(&skb->users) != 1) { 195 *skb2 = skb_clone(skb, allocation); 196 } else { 197 *skb2 = skb; 198 atomic_inc(&skb->users); 199 } 200 } 201 if (*skb2 != NULL) { 202 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) { 203 skb_orphan(*skb2); 204 skb_set_owner_r(*skb2, sk); 205 skb_queue_tail(&sk->sk_receive_queue, *skb2); 206 sk->sk_data_ready(sk, (*skb2)->len); 207 *skb2 = NULL; 208 err = 0; 209 } 210 } 211 sock_put(sk); 212 return err; 213 } 214 215 /* Send SKB to all pfkey sockets matching selected criteria. */ 216 #define BROADCAST_ALL 0 217 #define BROADCAST_ONE 1 218 #define BROADCAST_REGISTERED 2 219 #define BROADCAST_PROMISC_ONLY 4 220 static int pfkey_broadcast(struct sk_buff *skb, int allocation, 221 int broadcast_flags, struct sock *one_sk) 222 { 223 struct sock *sk; 224 struct hlist_node *node; 225 struct sk_buff *skb2 = NULL; 226 int err = -ESRCH; 227 228 /* XXX Do we need something like netlink_overrun? I think 229 * XXX PF_KEY socket apps will not mind current behavior. 230 */ 231 if (!skb) 232 return -ENOMEM; 233 234 pfkey_lock_table(); 235 sk_for_each(sk, node, &pfkey_table) { 236 struct pfkey_sock *pfk = pfkey_sk(sk); 237 int err2; 238 239 /* Yes, it means that if you are meant to receive this 240 * pfkey message you receive it twice as promiscuous 241 * socket. 242 */ 243 if (pfk->promisc) 244 pfkey_broadcast_one(skb, &skb2, allocation, sk); 245 246 /* the exact target will be processed later */ 247 if (sk == one_sk) 248 continue; 249 if (broadcast_flags != BROADCAST_ALL) { 250 if (broadcast_flags & BROADCAST_PROMISC_ONLY) 251 continue; 252 if ((broadcast_flags & BROADCAST_REGISTERED) && 253 !pfk->registered) 254 continue; 255 if (broadcast_flags & BROADCAST_ONE) 256 continue; 257 } 258 259 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk); 260 261 /* Error is cleare after succecful sending to at least one 262 * registered KM */ 263 if ((broadcast_flags & BROADCAST_REGISTERED) && err) 264 err = err2; 265 } 266 pfkey_unlock_table(); 267 268 if (one_sk != NULL) 269 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk); 270 271 if (skb2) 272 kfree_skb(skb2); 273 kfree_skb(skb); 274 return err; 275 } 276 277 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig) 278 { 279 *new = *orig; 280 } 281 282 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk) 283 { 284 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL); 285 struct sadb_msg *hdr; 286 287 if (!skb) 288 return -ENOBUFS; 289 290 /* Woe be to the platform trying to support PFKEY yet 291 * having normal errnos outside the 1-255 range, inclusive. 292 */ 293 err = -err; 294 if (err == ERESTARTSYS || 295 err == ERESTARTNOHAND || 296 err == ERESTARTNOINTR) 297 err = EINTR; 298 if (err >= 512) 299 err = EINVAL; 300 if (err <= 0 || err >= 256) 301 BUG(); 302 303 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); 304 pfkey_hdr_dup(hdr, orig); 305 hdr->sadb_msg_errno = (uint8_t) err; 306 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / 307 sizeof(uint64_t)); 308 309 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk); 310 311 return 0; 312 } 313 314 static u8 sadb_ext_min_len[] = { 315 [SADB_EXT_RESERVED] = (u8) 0, 316 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa), 317 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime), 318 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime), 319 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime), 320 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address), 321 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address), 322 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address), 323 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key), 324 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key), 325 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident), 326 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident), 327 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens), 328 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop), 329 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported), 330 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported), 331 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange), 332 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate), 333 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy), 334 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2), 335 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type), 336 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port), 337 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port), 338 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address), 339 }; 340 341 /* Verify sadb_address_{len,prefixlen} against sa_family. */ 342 static int verify_address_len(void *p) 343 { 344 struct sadb_address *sp = p; 345 struct sockaddr *addr = (struct sockaddr *)(sp + 1); 346 struct sockaddr_in *sin; 347 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 348 struct sockaddr_in6 *sin6; 349 #endif 350 int len; 351 352 switch (addr->sa_family) { 353 case AF_INET: 354 len = sizeof(*sp) + sizeof(*sin) + (sizeof(uint64_t) - 1); 355 len /= sizeof(uint64_t); 356 if (sp->sadb_address_len != len || 357 sp->sadb_address_prefixlen > 32) 358 return -EINVAL; 359 break; 360 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 361 case AF_INET6: 362 len = sizeof(*sp) + sizeof(*sin6) + (sizeof(uint64_t) - 1); 363 len /= sizeof(uint64_t); 364 if (sp->sadb_address_len != len || 365 sp->sadb_address_prefixlen > 128) 366 return -EINVAL; 367 break; 368 #endif 369 default: 370 /* It is user using kernel to keep track of security 371 * associations for another protocol, such as 372 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify 373 * lengths. 374 * 375 * XXX Actually, association/policy database is not yet 376 * XXX able to cope with arbitrary sockaddr families. 377 * XXX When it can, remove this -EINVAL. -DaveM 378 */ 379 return -EINVAL; 380 break; 381 }; 382 383 return 0; 384 } 385 386 static int present_and_same_family(struct sadb_address *src, 387 struct sadb_address *dst) 388 { 389 struct sockaddr *s_addr, *d_addr; 390 391 if (!src || !dst) 392 return 0; 393 394 s_addr = (struct sockaddr *)(src + 1); 395 d_addr = (struct sockaddr *)(dst + 1); 396 if (s_addr->sa_family != d_addr->sa_family) 397 return 0; 398 if (s_addr->sa_family != AF_INET 399 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 400 && s_addr->sa_family != AF_INET6 401 #endif 402 ) 403 return 0; 404 405 return 1; 406 } 407 408 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 409 { 410 char *p = (char *) hdr; 411 int len = skb->len; 412 413 len -= sizeof(*hdr); 414 p += sizeof(*hdr); 415 while (len > 0) { 416 struct sadb_ext *ehdr = (struct sadb_ext *) p; 417 uint16_t ext_type; 418 int ext_len; 419 420 ext_len = ehdr->sadb_ext_len; 421 ext_len *= sizeof(uint64_t); 422 ext_type = ehdr->sadb_ext_type; 423 if (ext_len < sizeof(uint64_t) || 424 ext_len > len || 425 ext_type == SADB_EXT_RESERVED) 426 return -EINVAL; 427 428 if (ext_type <= SADB_EXT_MAX) { 429 int min = (int) sadb_ext_min_len[ext_type]; 430 if (ext_len < min) 431 return -EINVAL; 432 if (ext_hdrs[ext_type-1] != NULL) 433 return -EINVAL; 434 if (ext_type == SADB_EXT_ADDRESS_SRC || 435 ext_type == SADB_EXT_ADDRESS_DST || 436 ext_type == SADB_EXT_ADDRESS_PROXY || 437 ext_type == SADB_X_EXT_NAT_T_OA) { 438 if (verify_address_len(p)) 439 return -EINVAL; 440 } 441 ext_hdrs[ext_type-1] = p; 442 } 443 p += ext_len; 444 len -= ext_len; 445 } 446 447 return 0; 448 } 449 450 static uint16_t 451 pfkey_satype2proto(uint8_t satype) 452 { 453 switch (satype) { 454 case SADB_SATYPE_UNSPEC: 455 return IPSEC_PROTO_ANY; 456 case SADB_SATYPE_AH: 457 return IPPROTO_AH; 458 case SADB_SATYPE_ESP: 459 return IPPROTO_ESP; 460 case SADB_X_SATYPE_IPCOMP: 461 return IPPROTO_COMP; 462 break; 463 default: 464 return 0; 465 } 466 /* NOTREACHED */ 467 } 468 469 static uint8_t 470 pfkey_proto2satype(uint16_t proto) 471 { 472 switch (proto) { 473 case IPPROTO_AH: 474 return SADB_SATYPE_AH; 475 case IPPROTO_ESP: 476 return SADB_SATYPE_ESP; 477 case IPPROTO_COMP: 478 return SADB_X_SATYPE_IPCOMP; 479 break; 480 default: 481 return 0; 482 } 483 /* NOTREACHED */ 484 } 485 486 /* BTW, this scheme means that there is no way with PFKEY2 sockets to 487 * say specifically 'just raw sockets' as we encode them as 255. 488 */ 489 490 static uint8_t pfkey_proto_to_xfrm(uint8_t proto) 491 { 492 return (proto == IPSEC_PROTO_ANY ? 0 : proto); 493 } 494 495 static uint8_t pfkey_proto_from_xfrm(uint8_t proto) 496 { 497 return (proto ? proto : IPSEC_PROTO_ANY); 498 } 499 500 static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr, 501 xfrm_address_t *xaddr) 502 { 503 switch (((struct sockaddr*)(addr + 1))->sa_family) { 504 case AF_INET: 505 xaddr->a4 = 506 ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr; 507 return AF_INET; 508 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 509 case AF_INET6: 510 memcpy(xaddr->a6, 511 &((struct sockaddr_in6 *)(addr + 1))->sin6_addr, 512 sizeof(struct in6_addr)); 513 return AF_INET6; 514 #endif 515 default: 516 return 0; 517 } 518 /* NOTREACHED */ 519 } 520 521 static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs) 522 { 523 struct sadb_sa *sa; 524 struct sadb_address *addr; 525 uint16_t proto; 526 unsigned short family; 527 xfrm_address_t *xaddr; 528 529 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; 530 if (sa == NULL) 531 return NULL; 532 533 proto = pfkey_satype2proto(hdr->sadb_msg_satype); 534 if (proto == 0) 535 return NULL; 536 537 /* sadb_address_len should be checked by caller */ 538 addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1]; 539 if (addr == NULL) 540 return NULL; 541 542 family = ((struct sockaddr *)(addr + 1))->sa_family; 543 switch (family) { 544 case AF_INET: 545 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr; 546 break; 547 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 548 case AF_INET6: 549 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr; 550 break; 551 #endif 552 default: 553 xaddr = NULL; 554 } 555 556 if (!xaddr) 557 return NULL; 558 559 return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family); 560 } 561 562 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1))) 563 static int 564 pfkey_sockaddr_size(sa_family_t family) 565 { 566 switch (family) { 567 case AF_INET: 568 return PFKEY_ALIGN8(sizeof(struct sockaddr_in)); 569 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 570 case AF_INET6: 571 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6)); 572 #endif 573 default: 574 return 0; 575 } 576 /* NOTREACHED */ 577 } 578 579 static struct sk_buff * pfkey_xfrm_state2msg(struct xfrm_state *x, int add_keys, int hsc) 580 { 581 struct sk_buff *skb; 582 struct sadb_msg *hdr; 583 struct sadb_sa *sa; 584 struct sadb_lifetime *lifetime; 585 struct sadb_address *addr; 586 struct sadb_key *key; 587 struct sadb_x_sa2 *sa2; 588 struct sockaddr_in *sin; 589 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 590 struct sockaddr_in6 *sin6; 591 #endif 592 int size; 593 int auth_key_size = 0; 594 int encrypt_key_size = 0; 595 int sockaddr_size; 596 struct xfrm_encap_tmpl *natt = NULL; 597 598 /* address family check */ 599 sockaddr_size = pfkey_sockaddr_size(x->props.family); 600 if (!sockaddr_size) 601 return ERR_PTR(-EINVAL); 602 603 /* base, SA, (lifetime (HSC),) address(SD), (address(P),) 604 key(AE), (identity(SD),) (sensitivity)> */ 605 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) + 606 sizeof(struct sadb_lifetime) + 607 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) + 608 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) + 609 sizeof(struct sadb_address)*2 + 610 sockaddr_size*2 + 611 sizeof(struct sadb_x_sa2); 612 /* identity & sensitivity */ 613 614 if ((x->props.family == AF_INET && 615 x->sel.saddr.a4 != x->props.saddr.a4) 616 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 617 || (x->props.family == AF_INET6 && 618 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr))) 619 #endif 620 ) 621 size += sizeof(struct sadb_address) + sockaddr_size; 622 623 if (add_keys) { 624 if (x->aalg && x->aalg->alg_key_len) { 625 auth_key_size = 626 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8); 627 size += sizeof(struct sadb_key) + auth_key_size; 628 } 629 if (x->ealg && x->ealg->alg_key_len) { 630 encrypt_key_size = 631 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8); 632 size += sizeof(struct sadb_key) + encrypt_key_size; 633 } 634 } 635 if (x->encap) 636 natt = x->encap; 637 638 if (natt && natt->encap_type) { 639 size += sizeof(struct sadb_x_nat_t_type); 640 size += sizeof(struct sadb_x_nat_t_port); 641 size += sizeof(struct sadb_x_nat_t_port); 642 } 643 644 skb = alloc_skb(size + 16, GFP_ATOMIC); 645 if (skb == NULL) 646 return ERR_PTR(-ENOBUFS); 647 648 /* call should fill header later */ 649 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); 650 memset(hdr, 0, size); /* XXX do we need this ? */ 651 hdr->sadb_msg_len = size / sizeof(uint64_t); 652 653 /* sa */ 654 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); 655 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); 656 sa->sadb_sa_exttype = SADB_EXT_SA; 657 sa->sadb_sa_spi = x->id.spi; 658 sa->sadb_sa_replay = x->props.replay_window; 659 sa->sadb_sa_state = SADB_SASTATE_DYING; 660 if (x->km.state == XFRM_STATE_VALID && !x->km.dying) 661 sa->sadb_sa_state = SADB_SASTATE_MATURE; 662 else if (x->km.state == XFRM_STATE_ACQ) 663 sa->sadb_sa_state = SADB_SASTATE_LARVAL; 664 else if (x->km.state == XFRM_STATE_EXPIRED) 665 sa->sadb_sa_state = SADB_SASTATE_DEAD; 666 sa->sadb_sa_auth = 0; 667 if (x->aalg) { 668 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0); 669 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0; 670 } 671 sa->sadb_sa_encrypt = 0; 672 BUG_ON(x->ealg && x->calg); 673 if (x->ealg) { 674 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0); 675 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; 676 } 677 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */ 678 if (x->calg) { 679 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0); 680 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; 681 } 682 683 sa->sadb_sa_flags = 0; 684 if (x->props.flags & XFRM_STATE_NOECN) 685 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN; 686 if (x->props.flags & XFRM_STATE_DECAP_DSCP) 687 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP; 688 689 /* hard time */ 690 if (hsc & 2) { 691 lifetime = (struct sadb_lifetime *) skb_put(skb, 692 sizeof(struct sadb_lifetime)); 693 lifetime->sadb_lifetime_len = 694 sizeof(struct sadb_lifetime)/sizeof(uint64_t); 695 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 696 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit); 697 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit); 698 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds; 699 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds; 700 } 701 /* soft time */ 702 if (hsc & 1) { 703 lifetime = (struct sadb_lifetime *) skb_put(skb, 704 sizeof(struct sadb_lifetime)); 705 lifetime->sadb_lifetime_len = 706 sizeof(struct sadb_lifetime)/sizeof(uint64_t); 707 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; 708 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit); 709 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit); 710 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds; 711 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds; 712 } 713 /* current time */ 714 lifetime = (struct sadb_lifetime *) skb_put(skb, 715 sizeof(struct sadb_lifetime)); 716 lifetime->sadb_lifetime_len = 717 sizeof(struct sadb_lifetime)/sizeof(uint64_t); 718 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 719 lifetime->sadb_lifetime_allocations = x->curlft.packets; 720 lifetime->sadb_lifetime_bytes = x->curlft.bytes; 721 lifetime->sadb_lifetime_addtime = x->curlft.add_time; 722 lifetime->sadb_lifetime_usetime = x->curlft.use_time; 723 /* src address */ 724 addr = (struct sadb_address*) skb_put(skb, 725 sizeof(struct sadb_address)+sockaddr_size); 726 addr->sadb_address_len = 727 (sizeof(struct sadb_address)+sockaddr_size)/ 728 sizeof(uint64_t); 729 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; 730 /* "if the ports are non-zero, then the sadb_address_proto field, 731 normally zero, MUST be filled in with the transport 732 protocol's number." - RFC2367 */ 733 addr->sadb_address_proto = 0; 734 addr->sadb_address_reserved = 0; 735 if (x->props.family == AF_INET) { 736 addr->sadb_address_prefixlen = 32; 737 738 sin = (struct sockaddr_in *) (addr + 1); 739 sin->sin_family = AF_INET; 740 sin->sin_addr.s_addr = x->props.saddr.a4; 741 sin->sin_port = 0; 742 memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); 743 } 744 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 745 else if (x->props.family == AF_INET6) { 746 addr->sadb_address_prefixlen = 128; 747 748 sin6 = (struct sockaddr_in6 *) (addr + 1); 749 sin6->sin6_family = AF_INET6; 750 sin6->sin6_port = 0; 751 sin6->sin6_flowinfo = 0; 752 memcpy(&sin6->sin6_addr, x->props.saddr.a6, 753 sizeof(struct in6_addr)); 754 sin6->sin6_scope_id = 0; 755 } 756 #endif 757 else 758 BUG(); 759 760 /* dst address */ 761 addr = (struct sadb_address*) skb_put(skb, 762 sizeof(struct sadb_address)+sockaddr_size); 763 addr->sadb_address_len = 764 (sizeof(struct sadb_address)+sockaddr_size)/ 765 sizeof(uint64_t); 766 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; 767 addr->sadb_address_proto = 0; 768 addr->sadb_address_prefixlen = 32; /* XXX */ 769 addr->sadb_address_reserved = 0; 770 if (x->props.family == AF_INET) { 771 sin = (struct sockaddr_in *) (addr + 1); 772 sin->sin_family = AF_INET; 773 sin->sin_addr.s_addr = x->id.daddr.a4; 774 sin->sin_port = 0; 775 memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); 776 777 if (x->sel.saddr.a4 != x->props.saddr.a4) { 778 addr = (struct sadb_address*) skb_put(skb, 779 sizeof(struct sadb_address)+sockaddr_size); 780 addr->sadb_address_len = 781 (sizeof(struct sadb_address)+sockaddr_size)/ 782 sizeof(uint64_t); 783 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; 784 addr->sadb_address_proto = 785 pfkey_proto_from_xfrm(x->sel.proto); 786 addr->sadb_address_prefixlen = x->sel.prefixlen_s; 787 addr->sadb_address_reserved = 0; 788 789 sin = (struct sockaddr_in *) (addr + 1); 790 sin->sin_family = AF_INET; 791 sin->sin_addr.s_addr = x->sel.saddr.a4; 792 sin->sin_port = x->sel.sport; 793 memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); 794 } 795 } 796 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 797 else if (x->props.family == AF_INET6) { 798 addr->sadb_address_prefixlen = 128; 799 800 sin6 = (struct sockaddr_in6 *) (addr + 1); 801 sin6->sin6_family = AF_INET6; 802 sin6->sin6_port = 0; 803 sin6->sin6_flowinfo = 0; 804 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr)); 805 sin6->sin6_scope_id = 0; 806 807 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6, 808 sizeof(struct in6_addr))) { 809 addr = (struct sadb_address *) skb_put(skb, 810 sizeof(struct sadb_address)+sockaddr_size); 811 addr->sadb_address_len = 812 (sizeof(struct sadb_address)+sockaddr_size)/ 813 sizeof(uint64_t); 814 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; 815 addr->sadb_address_proto = 816 pfkey_proto_from_xfrm(x->sel.proto); 817 addr->sadb_address_prefixlen = x->sel.prefixlen_s; 818 addr->sadb_address_reserved = 0; 819 820 sin6 = (struct sockaddr_in6 *) (addr + 1); 821 sin6->sin6_family = AF_INET6; 822 sin6->sin6_port = x->sel.sport; 823 sin6->sin6_flowinfo = 0; 824 memcpy(&sin6->sin6_addr, x->sel.saddr.a6, 825 sizeof(struct in6_addr)); 826 sin6->sin6_scope_id = 0; 827 } 828 } 829 #endif 830 else 831 BUG(); 832 833 /* auth key */ 834 if (add_keys && auth_key_size) { 835 key = (struct sadb_key *) skb_put(skb, 836 sizeof(struct sadb_key)+auth_key_size); 837 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) / 838 sizeof(uint64_t); 839 key->sadb_key_exttype = SADB_EXT_KEY_AUTH; 840 key->sadb_key_bits = x->aalg->alg_key_len; 841 key->sadb_key_reserved = 0; 842 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8); 843 } 844 /* encrypt key */ 845 if (add_keys && encrypt_key_size) { 846 key = (struct sadb_key *) skb_put(skb, 847 sizeof(struct sadb_key)+encrypt_key_size); 848 key->sadb_key_len = (sizeof(struct sadb_key) + 849 encrypt_key_size) / sizeof(uint64_t); 850 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT; 851 key->sadb_key_bits = x->ealg->alg_key_len; 852 key->sadb_key_reserved = 0; 853 memcpy(key + 1, x->ealg->alg_key, 854 (x->ealg->alg_key_len+7)/8); 855 } 856 857 /* sa */ 858 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2)); 859 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t); 860 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 861 sa2->sadb_x_sa2_mode = x->props.mode + 1; 862 sa2->sadb_x_sa2_reserved1 = 0; 863 sa2->sadb_x_sa2_reserved2 = 0; 864 sa2->sadb_x_sa2_sequence = 0; 865 sa2->sadb_x_sa2_reqid = x->props.reqid; 866 867 if (natt && natt->encap_type) { 868 struct sadb_x_nat_t_type *n_type; 869 struct sadb_x_nat_t_port *n_port; 870 871 /* type */ 872 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type)); 873 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t); 874 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 875 n_type->sadb_x_nat_t_type_type = natt->encap_type; 876 n_type->sadb_x_nat_t_type_reserved[0] = 0; 877 n_type->sadb_x_nat_t_type_reserved[1] = 0; 878 n_type->sadb_x_nat_t_type_reserved[2] = 0; 879 880 /* source port */ 881 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); 882 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); 883 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; 884 n_port->sadb_x_nat_t_port_port = natt->encap_sport; 885 n_port->sadb_x_nat_t_port_reserved = 0; 886 887 /* dest port */ 888 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); 889 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); 890 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; 891 n_port->sadb_x_nat_t_port_port = natt->encap_dport; 892 n_port->sadb_x_nat_t_port_reserved = 0; 893 } 894 895 return skb; 896 } 897 898 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr, 899 void **ext_hdrs) 900 { 901 struct xfrm_state *x; 902 struct sadb_lifetime *lifetime; 903 struct sadb_sa *sa; 904 struct sadb_key *key; 905 uint16_t proto; 906 int err; 907 908 909 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; 910 if (!sa || 911 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 912 ext_hdrs[SADB_EXT_ADDRESS_DST-1])) 913 return ERR_PTR(-EINVAL); 914 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP && 915 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]) 916 return ERR_PTR(-EINVAL); 917 if (hdr->sadb_msg_satype == SADB_SATYPE_AH && 918 !ext_hdrs[SADB_EXT_KEY_AUTH-1]) 919 return ERR_PTR(-EINVAL); 920 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] != 921 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) 922 return ERR_PTR(-EINVAL); 923 924 proto = pfkey_satype2proto(hdr->sadb_msg_satype); 925 if (proto == 0) 926 return ERR_PTR(-EINVAL); 927 928 /* default error is no buffer space */ 929 err = -ENOBUFS; 930 931 /* RFC2367: 932 933 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message. 934 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not 935 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state. 936 Therefore, the sadb_sa_state field of all submitted SAs MUST be 937 SADB_SASTATE_MATURE and the kernel MUST return an error if this is 938 not true. 939 940 However, KAME setkey always uses SADB_SASTATE_LARVAL. 941 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable. 942 */ 943 if (sa->sadb_sa_auth > SADB_AALG_MAX || 944 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP && 945 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) || 946 sa->sadb_sa_encrypt > SADB_EALG_MAX) 947 return ERR_PTR(-EINVAL); 948 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; 949 if (key != NULL && 950 sa->sadb_sa_auth != SADB_X_AALG_NULL && 951 ((key->sadb_key_bits+7) / 8 == 0 || 952 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) 953 return ERR_PTR(-EINVAL); 954 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; 955 if (key != NULL && 956 sa->sadb_sa_encrypt != SADB_EALG_NULL && 957 ((key->sadb_key_bits+7) / 8 == 0 || 958 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) 959 return ERR_PTR(-EINVAL); 960 961 x = xfrm_state_alloc(); 962 if (x == NULL) 963 return ERR_PTR(-ENOBUFS); 964 965 x->id.proto = proto; 966 x->id.spi = sa->sadb_sa_spi; 967 x->props.replay_window = sa->sadb_sa_replay; 968 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN) 969 x->props.flags |= XFRM_STATE_NOECN; 970 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP) 971 x->props.flags |= XFRM_STATE_DECAP_DSCP; 972 973 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1]; 974 if (lifetime != NULL) { 975 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); 976 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); 977 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; 978 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; 979 } 980 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]; 981 if (lifetime != NULL) { 982 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); 983 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); 984 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; 985 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; 986 } 987 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; 988 if (sa->sadb_sa_auth) { 989 int keysize = 0; 990 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth); 991 if (!a) { 992 err = -ENOSYS; 993 goto out; 994 } 995 if (key) 996 keysize = (key->sadb_key_bits + 7) / 8; 997 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL); 998 if (!x->aalg) 999 goto out; 1000 strcpy(x->aalg->alg_name, a->name); 1001 x->aalg->alg_key_len = 0; 1002 if (key) { 1003 x->aalg->alg_key_len = key->sadb_key_bits; 1004 memcpy(x->aalg->alg_key, key+1, keysize); 1005 } 1006 x->props.aalgo = sa->sadb_sa_auth; 1007 /* x->algo.flags = sa->sadb_sa_flags; */ 1008 } 1009 if (sa->sadb_sa_encrypt) { 1010 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) { 1011 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt); 1012 if (!a) { 1013 err = -ENOSYS; 1014 goto out; 1015 } 1016 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL); 1017 if (!x->calg) 1018 goto out; 1019 strcpy(x->calg->alg_name, a->name); 1020 x->props.calgo = sa->sadb_sa_encrypt; 1021 } else { 1022 int keysize = 0; 1023 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt); 1024 if (!a) { 1025 err = -ENOSYS; 1026 goto out; 1027 } 1028 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; 1029 if (key) 1030 keysize = (key->sadb_key_bits + 7) / 8; 1031 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL); 1032 if (!x->ealg) 1033 goto out; 1034 strcpy(x->ealg->alg_name, a->name); 1035 x->ealg->alg_key_len = 0; 1036 if (key) { 1037 x->ealg->alg_key_len = key->sadb_key_bits; 1038 memcpy(x->ealg->alg_key, key+1, keysize); 1039 } 1040 x->props.ealgo = sa->sadb_sa_encrypt; 1041 } 1042 } 1043 /* x->algo.flags = sa->sadb_sa_flags; */ 1044 1045 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 1046 &x->props.saddr); 1047 if (!x->props.family) { 1048 err = -EAFNOSUPPORT; 1049 goto out; 1050 } 1051 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1], 1052 &x->id.daddr); 1053 1054 if (ext_hdrs[SADB_X_EXT_SA2-1]) { 1055 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1]; 1056 x->props.mode = sa2->sadb_x_sa2_mode; 1057 if (x->props.mode) 1058 x->props.mode--; 1059 x->props.reqid = sa2->sadb_x_sa2_reqid; 1060 } 1061 1062 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) { 1063 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]; 1064 1065 /* Nobody uses this, but we try. */ 1066 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr); 1067 x->sel.prefixlen_s = addr->sadb_address_prefixlen; 1068 } 1069 1070 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) { 1071 struct sadb_x_nat_t_type* n_type; 1072 struct xfrm_encap_tmpl *natt; 1073 1074 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL); 1075 if (!x->encap) 1076 goto out; 1077 1078 natt = x->encap; 1079 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]; 1080 natt->encap_type = n_type->sadb_x_nat_t_type_type; 1081 1082 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) { 1083 struct sadb_x_nat_t_port* n_port = 1084 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]; 1085 natt->encap_sport = n_port->sadb_x_nat_t_port_port; 1086 } 1087 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) { 1088 struct sadb_x_nat_t_port* n_port = 1089 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]; 1090 natt->encap_dport = n_port->sadb_x_nat_t_port_port; 1091 } 1092 } 1093 1094 x->type = xfrm_get_type(proto, x->props.family); 1095 if (x->type == NULL) { 1096 err = -ENOPROTOOPT; 1097 goto out; 1098 } 1099 if (x->type->init_state(x, NULL)) { 1100 err = -EINVAL; 1101 goto out; 1102 } 1103 x->km.seq = hdr->sadb_msg_seq; 1104 x->km.state = XFRM_STATE_VALID; 1105 return x; 1106 1107 out: 1108 x->km.state = XFRM_STATE_DEAD; 1109 xfrm_state_put(x); 1110 return ERR_PTR(err); 1111 } 1112 1113 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1114 { 1115 return -EOPNOTSUPP; 1116 } 1117 1118 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1119 { 1120 struct sk_buff *resp_skb; 1121 struct sadb_x_sa2 *sa2; 1122 struct sadb_address *saddr, *daddr; 1123 struct sadb_msg *out_hdr; 1124 struct xfrm_state *x = NULL; 1125 u8 mode; 1126 u32 reqid; 1127 u8 proto; 1128 unsigned short family; 1129 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL; 1130 1131 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 1132 ext_hdrs[SADB_EXT_ADDRESS_DST-1])) 1133 return -EINVAL; 1134 1135 proto = pfkey_satype2proto(hdr->sadb_msg_satype); 1136 if (proto == 0) 1137 return -EINVAL; 1138 1139 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) { 1140 mode = sa2->sadb_x_sa2_mode - 1; 1141 reqid = sa2->sadb_x_sa2_reqid; 1142 } else { 1143 mode = 0; 1144 reqid = 0; 1145 } 1146 1147 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; 1148 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; 1149 1150 family = ((struct sockaddr *)(saddr + 1))->sa_family; 1151 switch (family) { 1152 case AF_INET: 1153 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr; 1154 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr; 1155 break; 1156 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 1157 case AF_INET6: 1158 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr; 1159 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr; 1160 break; 1161 #endif 1162 } 1163 1164 if (hdr->sadb_msg_seq) { 1165 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq); 1166 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) { 1167 xfrm_state_put(x); 1168 x = NULL; 1169 } 1170 } 1171 1172 if (!x) 1173 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family); 1174 1175 if (x == NULL) 1176 return -ENOENT; 1177 1178 resp_skb = ERR_PTR(-ENOENT); 1179 1180 spin_lock_bh(&x->lock); 1181 if (x->km.state != XFRM_STATE_DEAD) { 1182 struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1]; 1183 u32 min_spi, max_spi; 1184 1185 if (range != NULL) { 1186 min_spi = range->sadb_spirange_min; 1187 max_spi = range->sadb_spirange_max; 1188 } else { 1189 min_spi = 0x100; 1190 max_spi = 0x0fffffff; 1191 } 1192 xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi)); 1193 if (x->id.spi) 1194 resp_skb = pfkey_xfrm_state2msg(x, 0, 3); 1195 } 1196 spin_unlock_bh(&x->lock); 1197 1198 if (IS_ERR(resp_skb)) { 1199 xfrm_state_put(x); 1200 return PTR_ERR(resp_skb); 1201 } 1202 1203 out_hdr = (struct sadb_msg *) resp_skb->data; 1204 out_hdr->sadb_msg_version = hdr->sadb_msg_version; 1205 out_hdr->sadb_msg_type = SADB_GETSPI; 1206 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); 1207 out_hdr->sadb_msg_errno = 0; 1208 out_hdr->sadb_msg_reserved = 0; 1209 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; 1210 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; 1211 1212 xfrm_state_put(x); 1213 1214 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk); 1215 1216 return 0; 1217 } 1218 1219 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1220 { 1221 struct xfrm_state *x; 1222 1223 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8) 1224 return -EOPNOTSUPP; 1225 1226 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0) 1227 return 0; 1228 1229 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq); 1230 if (x == NULL) 1231 return 0; 1232 1233 spin_lock_bh(&x->lock); 1234 if (x->km.state == XFRM_STATE_ACQ) { 1235 x->km.state = XFRM_STATE_ERROR; 1236 wake_up(&km_waitq); 1237 } 1238 spin_unlock_bh(&x->lock); 1239 xfrm_state_put(x); 1240 return 0; 1241 } 1242 1243 1244 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1245 { 1246 struct sk_buff *out_skb; 1247 struct sadb_msg *out_hdr; 1248 struct xfrm_state *x; 1249 int err; 1250 1251 xfrm_probe_algs(); 1252 1253 x = pfkey_msg2xfrm_state(hdr, ext_hdrs); 1254 if (IS_ERR(x)) 1255 return PTR_ERR(x); 1256 1257 if (hdr->sadb_msg_type == SADB_ADD) 1258 err = xfrm_state_add(x); 1259 else 1260 err = xfrm_state_update(x); 1261 1262 if (err < 0) { 1263 x->km.state = XFRM_STATE_DEAD; 1264 xfrm_state_put(x); 1265 return err; 1266 } 1267 1268 out_skb = pfkey_xfrm_state2msg(x, 0, 3); 1269 if (IS_ERR(out_skb)) 1270 return PTR_ERR(out_skb); /* XXX Should we return 0 here ? */ 1271 1272 out_hdr = (struct sadb_msg *) out_skb->data; 1273 out_hdr->sadb_msg_version = hdr->sadb_msg_version; 1274 out_hdr->sadb_msg_type = hdr->sadb_msg_type; 1275 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); 1276 out_hdr->sadb_msg_errno = 0; 1277 out_hdr->sadb_msg_reserved = 0; 1278 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; 1279 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; 1280 1281 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, sk); 1282 1283 return 0; 1284 } 1285 1286 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1287 { 1288 struct xfrm_state *x; 1289 1290 if (!ext_hdrs[SADB_EXT_SA-1] || 1291 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 1292 ext_hdrs[SADB_EXT_ADDRESS_DST-1])) 1293 return -EINVAL; 1294 1295 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs); 1296 if (x == NULL) 1297 return -ESRCH; 1298 1299 if (xfrm_state_kern(x)) { 1300 xfrm_state_put(x); 1301 return -EPERM; 1302 } 1303 1304 xfrm_state_delete(x); 1305 xfrm_state_put(x); 1306 1307 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, 1308 BROADCAST_ALL, sk); 1309 1310 return 0; 1311 } 1312 1313 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1314 { 1315 __u8 proto; 1316 struct sk_buff *out_skb; 1317 struct sadb_msg *out_hdr; 1318 struct xfrm_state *x; 1319 1320 if (!ext_hdrs[SADB_EXT_SA-1] || 1321 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 1322 ext_hdrs[SADB_EXT_ADDRESS_DST-1])) 1323 return -EINVAL; 1324 1325 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs); 1326 if (x == NULL) 1327 return -ESRCH; 1328 1329 out_skb = pfkey_xfrm_state2msg(x, 1, 3); 1330 proto = x->id.proto; 1331 xfrm_state_put(x); 1332 if (IS_ERR(out_skb)) 1333 return PTR_ERR(out_skb); 1334 1335 out_hdr = (struct sadb_msg *) out_skb->data; 1336 out_hdr->sadb_msg_version = hdr->sadb_msg_version; 1337 out_hdr->sadb_msg_type = SADB_DUMP; 1338 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); 1339 out_hdr->sadb_msg_errno = 0; 1340 out_hdr->sadb_msg_reserved = 0; 1341 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; 1342 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; 1343 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk); 1344 1345 return 0; 1346 } 1347 1348 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig, int allocation) 1349 { 1350 struct sk_buff *skb; 1351 struct sadb_msg *hdr; 1352 int len, auth_len, enc_len, i; 1353 1354 auth_len = xfrm_count_auth_supported(); 1355 if (auth_len) { 1356 auth_len *= sizeof(struct sadb_alg); 1357 auth_len += sizeof(struct sadb_supported); 1358 } 1359 1360 enc_len = xfrm_count_enc_supported(); 1361 if (enc_len) { 1362 enc_len *= sizeof(struct sadb_alg); 1363 enc_len += sizeof(struct sadb_supported); 1364 } 1365 1366 len = enc_len + auth_len + sizeof(struct sadb_msg); 1367 1368 skb = alloc_skb(len + 16, allocation); 1369 if (!skb) 1370 goto out_put_algs; 1371 1372 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr)); 1373 pfkey_hdr_dup(hdr, orig); 1374 hdr->sadb_msg_errno = 0; 1375 hdr->sadb_msg_len = len / sizeof(uint64_t); 1376 1377 if (auth_len) { 1378 struct sadb_supported *sp; 1379 struct sadb_alg *ap; 1380 1381 sp = (struct sadb_supported *) skb_put(skb, auth_len); 1382 ap = (struct sadb_alg *) (sp + 1); 1383 1384 sp->sadb_supported_len = auth_len / sizeof(uint64_t); 1385 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 1386 1387 for (i = 0; ; i++) { 1388 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); 1389 if (!aalg) 1390 break; 1391 if (aalg->available) 1392 *ap++ = aalg->desc; 1393 } 1394 } 1395 1396 if (enc_len) { 1397 struct sadb_supported *sp; 1398 struct sadb_alg *ap; 1399 1400 sp = (struct sadb_supported *) skb_put(skb, enc_len); 1401 ap = (struct sadb_alg *) (sp + 1); 1402 1403 sp->sadb_supported_len = enc_len / sizeof(uint64_t); 1404 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 1405 1406 for (i = 0; ; i++) { 1407 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); 1408 if (!ealg) 1409 break; 1410 if (ealg->available) 1411 *ap++ = ealg->desc; 1412 } 1413 } 1414 1415 out_put_algs: 1416 return skb; 1417 } 1418 1419 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1420 { 1421 struct pfkey_sock *pfk = pfkey_sk(sk); 1422 struct sk_buff *supp_skb; 1423 1424 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX) 1425 return -EINVAL; 1426 1427 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) { 1428 if (pfk->registered&(1<<hdr->sadb_msg_satype)) 1429 return -EEXIST; 1430 pfk->registered |= (1<<hdr->sadb_msg_satype); 1431 } 1432 1433 xfrm_probe_algs(); 1434 1435 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL); 1436 if (!supp_skb) { 1437 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) 1438 pfk->registered &= ~(1<<hdr->sadb_msg_satype); 1439 1440 return -ENOBUFS; 1441 } 1442 1443 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk); 1444 1445 return 0; 1446 } 1447 1448 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1449 { 1450 unsigned proto; 1451 struct sk_buff *skb_out; 1452 struct sadb_msg *hdr_out; 1453 1454 proto = pfkey_satype2proto(hdr->sadb_msg_satype); 1455 if (proto == 0) 1456 return -EINVAL; 1457 1458 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL); 1459 if (!skb_out) 1460 return -ENOBUFS; 1461 1462 xfrm_state_flush(proto); 1463 1464 hdr_out = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg)); 1465 pfkey_hdr_dup(hdr_out, hdr); 1466 hdr_out->sadb_msg_errno = (uint8_t) 0; 1467 hdr_out->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); 1468 1469 pfkey_broadcast(skb_out, GFP_KERNEL, BROADCAST_ALL, NULL); 1470 1471 return 0; 1472 } 1473 1474 struct pfkey_dump_data 1475 { 1476 struct sk_buff *skb; 1477 struct sadb_msg *hdr; 1478 struct sock *sk; 1479 }; 1480 1481 static int dump_sa(struct xfrm_state *x, int count, void *ptr) 1482 { 1483 struct pfkey_dump_data *data = ptr; 1484 struct sk_buff *out_skb; 1485 struct sadb_msg *out_hdr; 1486 1487 out_skb = pfkey_xfrm_state2msg(x, 1, 3); 1488 if (IS_ERR(out_skb)) 1489 return PTR_ERR(out_skb); 1490 1491 out_hdr = (struct sadb_msg *) out_skb->data; 1492 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version; 1493 out_hdr->sadb_msg_type = SADB_DUMP; 1494 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); 1495 out_hdr->sadb_msg_errno = 0; 1496 out_hdr->sadb_msg_reserved = 0; 1497 out_hdr->sadb_msg_seq = count; 1498 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid; 1499 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk); 1500 return 0; 1501 } 1502 1503 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1504 { 1505 u8 proto; 1506 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk }; 1507 1508 proto = pfkey_satype2proto(hdr->sadb_msg_satype); 1509 if (proto == 0) 1510 return -EINVAL; 1511 1512 return xfrm_state_walk(proto, dump_sa, &data); 1513 } 1514 1515 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1516 { 1517 struct pfkey_sock *pfk = pfkey_sk(sk); 1518 int satype = hdr->sadb_msg_satype; 1519 1520 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) { 1521 /* XXX we mangle packet... */ 1522 hdr->sadb_msg_errno = 0; 1523 if (satype != 0 && satype != 1) 1524 return -EINVAL; 1525 pfk->promisc = satype; 1526 } 1527 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL); 1528 return 0; 1529 } 1530 1531 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr) 1532 { 1533 int i; 1534 u32 reqid = *(u32*)ptr; 1535 1536 for (i=0; i<xp->xfrm_nr; i++) { 1537 if (xp->xfrm_vec[i].reqid == reqid) 1538 return -EEXIST; 1539 } 1540 return 0; 1541 } 1542 1543 static u32 gen_reqid(void) 1544 { 1545 u32 start; 1546 static u32 reqid = IPSEC_MANUAL_REQID_MAX; 1547 1548 start = reqid; 1549 do { 1550 ++reqid; 1551 if (reqid == 0) 1552 reqid = IPSEC_MANUAL_REQID_MAX+1; 1553 if (xfrm_policy_walk(check_reqid, (void*)&reqid) != -EEXIST) 1554 return reqid; 1555 } while (reqid != start); 1556 return 0; 1557 } 1558 1559 static int 1560 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq) 1561 { 1562 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr; 1563 struct sockaddr_in *sin; 1564 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 1565 struct sockaddr_in6 *sin6; 1566 #endif 1567 1568 if (xp->xfrm_nr >= XFRM_MAX_DEPTH) 1569 return -ELOOP; 1570 1571 if (rq->sadb_x_ipsecrequest_mode == 0) 1572 return -EINVAL; 1573 1574 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */ 1575 t->mode = rq->sadb_x_ipsecrequest_mode-1; 1576 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) 1577 t->optional = 1; 1578 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) { 1579 t->reqid = rq->sadb_x_ipsecrequest_reqid; 1580 if (t->reqid > IPSEC_MANUAL_REQID_MAX) 1581 t->reqid = 0; 1582 if (!t->reqid && !(t->reqid = gen_reqid())) 1583 return -ENOBUFS; 1584 } 1585 1586 /* addresses present only in tunnel mode */ 1587 if (t->mode) { 1588 switch (xp->family) { 1589 case AF_INET: 1590 sin = (void*)(rq+1); 1591 if (sin->sin_family != AF_INET) 1592 return -EINVAL; 1593 t->saddr.a4 = sin->sin_addr.s_addr; 1594 sin++; 1595 if (sin->sin_family != AF_INET) 1596 return -EINVAL; 1597 t->id.daddr.a4 = sin->sin_addr.s_addr; 1598 break; 1599 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 1600 case AF_INET6: 1601 sin6 = (void *)(rq+1); 1602 if (sin6->sin6_family != AF_INET6) 1603 return -EINVAL; 1604 memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr)); 1605 sin6++; 1606 if (sin6->sin6_family != AF_INET6) 1607 return -EINVAL; 1608 memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr)); 1609 break; 1610 #endif 1611 default: 1612 return -EINVAL; 1613 } 1614 } 1615 /* No way to set this via kame pfkey */ 1616 t->aalgos = t->ealgos = t->calgos = ~0; 1617 xp->xfrm_nr++; 1618 return 0; 1619 } 1620 1621 static int 1622 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol) 1623 { 1624 int err; 1625 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy); 1626 struct sadb_x_ipsecrequest *rq = (void*)(pol+1); 1627 1628 while (len >= sizeof(struct sadb_x_ipsecrequest)) { 1629 if ((err = parse_ipsecrequest(xp, rq)) < 0) 1630 return err; 1631 len -= rq->sadb_x_ipsecrequest_len; 1632 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len); 1633 } 1634 return 0; 1635 } 1636 1637 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp) 1638 { 1639 int sockaddr_size = pfkey_sockaddr_size(xp->family); 1640 int socklen = (xp->family == AF_INET ? 1641 sizeof(struct sockaddr_in) : 1642 sizeof(struct sockaddr_in6)); 1643 1644 return sizeof(struct sadb_msg) + 1645 (sizeof(struct sadb_lifetime) * 3) + 1646 (sizeof(struct sadb_address) * 2) + 1647 (sockaddr_size * 2) + 1648 sizeof(struct sadb_x_policy) + 1649 (xp->xfrm_nr * (sizeof(struct sadb_x_ipsecrequest) + 1650 (socklen * 2))); 1651 } 1652 1653 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp) 1654 { 1655 struct sk_buff *skb; 1656 int size; 1657 1658 size = pfkey_xfrm_policy2msg_size(xp); 1659 1660 skb = alloc_skb(size + 16, GFP_ATOMIC); 1661 if (skb == NULL) 1662 return ERR_PTR(-ENOBUFS); 1663 1664 return skb; 1665 } 1666 1667 static void pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir) 1668 { 1669 struct sadb_msg *hdr; 1670 struct sadb_address *addr; 1671 struct sadb_lifetime *lifetime; 1672 struct sadb_x_policy *pol; 1673 struct sockaddr_in *sin; 1674 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 1675 struct sockaddr_in6 *sin6; 1676 #endif 1677 int i; 1678 int size; 1679 int sockaddr_size = pfkey_sockaddr_size(xp->family); 1680 int socklen = (xp->family == AF_INET ? 1681 sizeof(struct sockaddr_in) : 1682 sizeof(struct sockaddr_in6)); 1683 1684 size = pfkey_xfrm_policy2msg_size(xp); 1685 1686 /* call should fill header later */ 1687 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); 1688 memset(hdr, 0, size); /* XXX do we need this ? */ 1689 1690 /* src address */ 1691 addr = (struct sadb_address*) skb_put(skb, 1692 sizeof(struct sadb_address)+sockaddr_size); 1693 addr->sadb_address_len = 1694 (sizeof(struct sadb_address)+sockaddr_size)/ 1695 sizeof(uint64_t); 1696 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; 1697 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); 1698 addr->sadb_address_prefixlen = xp->selector.prefixlen_s; 1699 addr->sadb_address_reserved = 0; 1700 /* src address */ 1701 if (xp->family == AF_INET) { 1702 sin = (struct sockaddr_in *) (addr + 1); 1703 sin->sin_family = AF_INET; 1704 sin->sin_addr.s_addr = xp->selector.saddr.a4; 1705 sin->sin_port = xp->selector.sport; 1706 memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); 1707 } 1708 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 1709 else if (xp->family == AF_INET6) { 1710 sin6 = (struct sockaddr_in6 *) (addr + 1); 1711 sin6->sin6_family = AF_INET6; 1712 sin6->sin6_port = xp->selector.sport; 1713 sin6->sin6_flowinfo = 0; 1714 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6, 1715 sizeof(struct in6_addr)); 1716 sin6->sin6_scope_id = 0; 1717 } 1718 #endif 1719 else 1720 BUG(); 1721 1722 /* dst address */ 1723 addr = (struct sadb_address*) skb_put(skb, 1724 sizeof(struct sadb_address)+sockaddr_size); 1725 addr->sadb_address_len = 1726 (sizeof(struct sadb_address)+sockaddr_size)/ 1727 sizeof(uint64_t); 1728 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; 1729 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); 1730 addr->sadb_address_prefixlen = xp->selector.prefixlen_d; 1731 addr->sadb_address_reserved = 0; 1732 if (xp->family == AF_INET) { 1733 sin = (struct sockaddr_in *) (addr + 1); 1734 sin->sin_family = AF_INET; 1735 sin->sin_addr.s_addr = xp->selector.daddr.a4; 1736 sin->sin_port = xp->selector.dport; 1737 memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); 1738 } 1739 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 1740 else if (xp->family == AF_INET6) { 1741 sin6 = (struct sockaddr_in6 *) (addr + 1); 1742 sin6->sin6_family = AF_INET6; 1743 sin6->sin6_port = xp->selector.dport; 1744 sin6->sin6_flowinfo = 0; 1745 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6, 1746 sizeof(struct in6_addr)); 1747 sin6->sin6_scope_id = 0; 1748 } 1749 #endif 1750 else 1751 BUG(); 1752 1753 /* hard time */ 1754 lifetime = (struct sadb_lifetime *) skb_put(skb, 1755 sizeof(struct sadb_lifetime)); 1756 lifetime->sadb_lifetime_len = 1757 sizeof(struct sadb_lifetime)/sizeof(uint64_t); 1758 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 1759 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit); 1760 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit); 1761 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds; 1762 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds; 1763 /* soft time */ 1764 lifetime = (struct sadb_lifetime *) skb_put(skb, 1765 sizeof(struct sadb_lifetime)); 1766 lifetime->sadb_lifetime_len = 1767 sizeof(struct sadb_lifetime)/sizeof(uint64_t); 1768 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; 1769 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit); 1770 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit); 1771 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds; 1772 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds; 1773 /* current time */ 1774 lifetime = (struct sadb_lifetime *) skb_put(skb, 1775 sizeof(struct sadb_lifetime)); 1776 lifetime->sadb_lifetime_len = 1777 sizeof(struct sadb_lifetime)/sizeof(uint64_t); 1778 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 1779 lifetime->sadb_lifetime_allocations = xp->curlft.packets; 1780 lifetime->sadb_lifetime_bytes = xp->curlft.bytes; 1781 lifetime->sadb_lifetime_addtime = xp->curlft.add_time; 1782 lifetime->sadb_lifetime_usetime = xp->curlft.use_time; 1783 1784 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); 1785 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); 1786 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1787 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD; 1788 if (xp->action == XFRM_POLICY_ALLOW) { 1789 if (xp->xfrm_nr) 1790 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; 1791 else 1792 pol->sadb_x_policy_type = IPSEC_POLICY_NONE; 1793 } 1794 pol->sadb_x_policy_dir = dir+1; 1795 pol->sadb_x_policy_id = xp->index; 1796 pol->sadb_x_policy_priority = xp->priority; 1797 1798 for (i=0; i<xp->xfrm_nr; i++) { 1799 struct sadb_x_ipsecrequest *rq; 1800 struct xfrm_tmpl *t = xp->xfrm_vec + i; 1801 int req_size; 1802 1803 req_size = sizeof(struct sadb_x_ipsecrequest); 1804 if (t->mode) 1805 req_size += 2*socklen; 1806 else 1807 size -= 2*socklen; 1808 rq = (void*)skb_put(skb, req_size); 1809 pol->sadb_x_policy_len += req_size/8; 1810 memset(rq, 0, sizeof(*rq)); 1811 rq->sadb_x_ipsecrequest_len = req_size; 1812 rq->sadb_x_ipsecrequest_proto = t->id.proto; 1813 rq->sadb_x_ipsecrequest_mode = t->mode+1; 1814 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE; 1815 if (t->reqid) 1816 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE; 1817 if (t->optional) 1818 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE; 1819 rq->sadb_x_ipsecrequest_reqid = t->reqid; 1820 if (t->mode) { 1821 switch (xp->family) { 1822 case AF_INET: 1823 sin = (void*)(rq+1); 1824 sin->sin_family = AF_INET; 1825 sin->sin_addr.s_addr = t->saddr.a4; 1826 sin->sin_port = 0; 1827 memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); 1828 sin++; 1829 sin->sin_family = AF_INET; 1830 sin->sin_addr.s_addr = t->id.daddr.a4; 1831 sin->sin_port = 0; 1832 memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); 1833 break; 1834 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 1835 case AF_INET6: 1836 sin6 = (void*)(rq+1); 1837 sin6->sin6_family = AF_INET6; 1838 sin6->sin6_port = 0; 1839 sin6->sin6_flowinfo = 0; 1840 memcpy(&sin6->sin6_addr, t->saddr.a6, 1841 sizeof(struct in6_addr)); 1842 sin6->sin6_scope_id = 0; 1843 1844 sin6++; 1845 sin6->sin6_family = AF_INET6; 1846 sin6->sin6_port = 0; 1847 sin6->sin6_flowinfo = 0; 1848 memcpy(&sin6->sin6_addr, t->id.daddr.a6, 1849 sizeof(struct in6_addr)); 1850 sin6->sin6_scope_id = 0; 1851 break; 1852 #endif 1853 default: 1854 break; 1855 } 1856 } 1857 } 1858 hdr->sadb_msg_len = size / sizeof(uint64_t); 1859 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt); 1860 } 1861 1862 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1863 { 1864 int err; 1865 struct sadb_lifetime *lifetime; 1866 struct sadb_address *sa; 1867 struct sadb_x_policy *pol; 1868 struct xfrm_policy *xp; 1869 struct sk_buff *out_skb; 1870 struct sadb_msg *out_hdr; 1871 1872 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 1873 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || 1874 !ext_hdrs[SADB_X_EXT_POLICY-1]) 1875 return -EINVAL; 1876 1877 pol = ext_hdrs[SADB_X_EXT_POLICY-1]; 1878 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC) 1879 return -EINVAL; 1880 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) 1881 return -EINVAL; 1882 1883 xp = xfrm_policy_alloc(GFP_KERNEL); 1884 if (xp == NULL) 1885 return -ENOBUFS; 1886 1887 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? 1888 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); 1889 xp->priority = pol->sadb_x_policy_priority; 1890 1891 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 1892 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr); 1893 if (!xp->family) { 1894 err = -EINVAL; 1895 goto out; 1896 } 1897 xp->selector.family = xp->family; 1898 xp->selector.prefixlen_s = sa->sadb_address_prefixlen; 1899 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); 1900 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port; 1901 if (xp->selector.sport) 1902 xp->selector.sport_mask = ~0; 1903 1904 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], 1905 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr); 1906 xp->selector.prefixlen_d = sa->sadb_address_prefixlen; 1907 1908 /* Amusing, we set this twice. KAME apps appear to set same value 1909 * in both addresses. 1910 */ 1911 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); 1912 1913 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port; 1914 if (xp->selector.dport) 1915 xp->selector.dport_mask = ~0; 1916 1917 xp->lft.soft_byte_limit = XFRM_INF; 1918 xp->lft.hard_byte_limit = XFRM_INF; 1919 xp->lft.soft_packet_limit = XFRM_INF; 1920 xp->lft.hard_packet_limit = XFRM_INF; 1921 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) { 1922 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); 1923 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); 1924 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; 1925 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; 1926 } 1927 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) { 1928 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); 1929 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); 1930 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; 1931 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; 1932 } 1933 xp->xfrm_nr = 0; 1934 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && 1935 (err = parse_ipsecrequests(xp, pol)) < 0) 1936 goto out; 1937 1938 out_skb = pfkey_xfrm_policy2msg_prep(xp); 1939 if (IS_ERR(out_skb)) { 1940 err = PTR_ERR(out_skb); 1941 goto out; 1942 } 1943 1944 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp, 1945 hdr->sadb_msg_type != SADB_X_SPDUPDATE); 1946 if (err) { 1947 kfree_skb(out_skb); 1948 goto out; 1949 } 1950 1951 pfkey_xfrm_policy2msg(out_skb, xp, pol->sadb_x_policy_dir-1); 1952 1953 xfrm_pol_put(xp); 1954 1955 out_hdr = (struct sadb_msg *) out_skb->data; 1956 out_hdr->sadb_msg_version = hdr->sadb_msg_version; 1957 out_hdr->sadb_msg_type = hdr->sadb_msg_type; 1958 out_hdr->sadb_msg_satype = 0; 1959 out_hdr->sadb_msg_errno = 0; 1960 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; 1961 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; 1962 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, sk); 1963 return 0; 1964 1965 out: 1966 kfree(xp); 1967 return err; 1968 } 1969 1970 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1971 { 1972 int err; 1973 struct sadb_address *sa; 1974 struct sadb_x_policy *pol; 1975 struct xfrm_policy *xp; 1976 struct sk_buff *out_skb; 1977 struct sadb_msg *out_hdr; 1978 struct xfrm_selector sel; 1979 1980 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 1981 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || 1982 !ext_hdrs[SADB_X_EXT_POLICY-1]) 1983 return -EINVAL; 1984 1985 pol = ext_hdrs[SADB_X_EXT_POLICY-1]; 1986 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) 1987 return -EINVAL; 1988 1989 memset(&sel, 0, sizeof(sel)); 1990 1991 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 1992 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); 1993 sel.prefixlen_s = sa->sadb_address_prefixlen; 1994 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); 1995 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port; 1996 if (sel.sport) 1997 sel.sport_mask = ~0; 1998 1999 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], 2000 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); 2001 sel.prefixlen_d = sa->sadb_address_prefixlen; 2002 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); 2003 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port; 2004 if (sel.dport) 2005 sel.dport_mask = ~0; 2006 2007 xp = xfrm_policy_bysel(pol->sadb_x_policy_dir-1, &sel, 1); 2008 if (xp == NULL) 2009 return -ENOENT; 2010 2011 err = 0; 2012 2013 out_skb = pfkey_xfrm_policy2msg_prep(xp); 2014 if (IS_ERR(out_skb)) { 2015 err = PTR_ERR(out_skb); 2016 goto out; 2017 } 2018 pfkey_xfrm_policy2msg(out_skb, xp, pol->sadb_x_policy_dir-1); 2019 2020 out_hdr = (struct sadb_msg *) out_skb->data; 2021 out_hdr->sadb_msg_version = hdr->sadb_msg_version; 2022 out_hdr->sadb_msg_type = SADB_X_SPDDELETE; 2023 out_hdr->sadb_msg_satype = 0; 2024 out_hdr->sadb_msg_errno = 0; 2025 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; 2026 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; 2027 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, sk); 2028 err = 0; 2029 2030 out: 2031 xfrm_pol_put(xp); 2032 return err; 2033 } 2034 2035 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 2036 { 2037 int err; 2038 struct sadb_x_policy *pol; 2039 struct xfrm_policy *xp; 2040 struct sk_buff *out_skb; 2041 struct sadb_msg *out_hdr; 2042 2043 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL) 2044 return -EINVAL; 2045 2046 xp = xfrm_policy_byid(0, pol->sadb_x_policy_id, 2047 hdr->sadb_msg_type == SADB_X_SPDDELETE2); 2048 if (xp == NULL) 2049 return -ENOENT; 2050 2051 err = 0; 2052 2053 out_skb = pfkey_xfrm_policy2msg_prep(xp); 2054 if (IS_ERR(out_skb)) { 2055 err = PTR_ERR(out_skb); 2056 goto out; 2057 } 2058 pfkey_xfrm_policy2msg(out_skb, xp, pol->sadb_x_policy_dir-1); 2059 2060 out_hdr = (struct sadb_msg *) out_skb->data; 2061 out_hdr->sadb_msg_version = hdr->sadb_msg_version; 2062 out_hdr->sadb_msg_type = hdr->sadb_msg_type; 2063 out_hdr->sadb_msg_satype = 0; 2064 out_hdr->sadb_msg_errno = 0; 2065 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; 2066 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; 2067 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, sk); 2068 err = 0; 2069 2070 out: 2071 xfrm_pol_put(xp); 2072 return err; 2073 } 2074 2075 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr) 2076 { 2077 struct pfkey_dump_data *data = ptr; 2078 struct sk_buff *out_skb; 2079 struct sadb_msg *out_hdr; 2080 2081 out_skb = pfkey_xfrm_policy2msg_prep(xp); 2082 if (IS_ERR(out_skb)) 2083 return PTR_ERR(out_skb); 2084 2085 pfkey_xfrm_policy2msg(out_skb, xp, dir); 2086 2087 out_hdr = (struct sadb_msg *) out_skb->data; 2088 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version; 2089 out_hdr->sadb_msg_type = SADB_X_SPDDUMP; 2090 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; 2091 out_hdr->sadb_msg_errno = 0; 2092 out_hdr->sadb_msg_seq = count; 2093 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid; 2094 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk); 2095 return 0; 2096 } 2097 2098 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 2099 { 2100 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk }; 2101 2102 return xfrm_policy_walk(dump_sp, &data); 2103 } 2104 2105 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 2106 { 2107 struct sk_buff *skb_out; 2108 struct sadb_msg *hdr_out; 2109 2110 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL); 2111 if (!skb_out) 2112 return -ENOBUFS; 2113 2114 xfrm_policy_flush(); 2115 2116 hdr_out = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg)); 2117 pfkey_hdr_dup(hdr_out, hdr); 2118 hdr_out->sadb_msg_errno = (uint8_t) 0; 2119 hdr_out->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); 2120 pfkey_broadcast(skb_out, GFP_KERNEL, BROADCAST_ALL, NULL); 2121 2122 return 0; 2123 } 2124 2125 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb, 2126 struct sadb_msg *hdr, void **ext_hdrs); 2127 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = { 2128 [SADB_RESERVED] = pfkey_reserved, 2129 [SADB_GETSPI] = pfkey_getspi, 2130 [SADB_UPDATE] = pfkey_add, 2131 [SADB_ADD] = pfkey_add, 2132 [SADB_DELETE] = pfkey_delete, 2133 [SADB_GET] = pfkey_get, 2134 [SADB_ACQUIRE] = pfkey_acquire, 2135 [SADB_REGISTER] = pfkey_register, 2136 [SADB_EXPIRE] = NULL, 2137 [SADB_FLUSH] = pfkey_flush, 2138 [SADB_DUMP] = pfkey_dump, 2139 [SADB_X_PROMISC] = pfkey_promisc, 2140 [SADB_X_PCHANGE] = NULL, 2141 [SADB_X_SPDUPDATE] = pfkey_spdadd, 2142 [SADB_X_SPDADD] = pfkey_spdadd, 2143 [SADB_X_SPDDELETE] = pfkey_spddelete, 2144 [SADB_X_SPDGET] = pfkey_spdget, 2145 [SADB_X_SPDACQUIRE] = NULL, 2146 [SADB_X_SPDDUMP] = pfkey_spddump, 2147 [SADB_X_SPDFLUSH] = pfkey_spdflush, 2148 [SADB_X_SPDSETIDX] = pfkey_spdadd, 2149 [SADB_X_SPDDELETE2] = pfkey_spdget, 2150 }; 2151 2152 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr) 2153 { 2154 void *ext_hdrs[SADB_EXT_MAX]; 2155 int err; 2156 2157 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, 2158 BROADCAST_PROMISC_ONLY, NULL); 2159 2160 memset(ext_hdrs, 0, sizeof(ext_hdrs)); 2161 err = parse_exthdrs(skb, hdr, ext_hdrs); 2162 if (!err) { 2163 err = -EOPNOTSUPP; 2164 if (pfkey_funcs[hdr->sadb_msg_type]) 2165 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs); 2166 } 2167 return err; 2168 } 2169 2170 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp) 2171 { 2172 struct sadb_msg *hdr = NULL; 2173 2174 if (skb->len < sizeof(*hdr)) { 2175 *errp = -EMSGSIZE; 2176 } else { 2177 hdr = (struct sadb_msg *) skb->data; 2178 if (hdr->sadb_msg_version != PF_KEY_V2 || 2179 hdr->sadb_msg_reserved != 0 || 2180 (hdr->sadb_msg_type <= SADB_RESERVED || 2181 hdr->sadb_msg_type > SADB_MAX)) { 2182 hdr = NULL; 2183 *errp = -EINVAL; 2184 } else if (hdr->sadb_msg_len != (skb->len / 2185 sizeof(uint64_t)) || 2186 hdr->sadb_msg_len < (sizeof(struct sadb_msg) / 2187 sizeof(uint64_t))) { 2188 hdr = NULL; 2189 *errp = -EMSGSIZE; 2190 } else { 2191 *errp = 0; 2192 } 2193 } 2194 return hdr; 2195 } 2196 2197 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) 2198 { 2199 return t->aalgos & (1 << d->desc.sadb_alg_id); 2200 } 2201 2202 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) 2203 { 2204 return t->ealgos & (1 << d->desc.sadb_alg_id); 2205 } 2206 2207 static int count_ah_combs(struct xfrm_tmpl *t) 2208 { 2209 int i, sz = 0; 2210 2211 for (i = 0; ; i++) { 2212 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); 2213 if (!aalg) 2214 break; 2215 if (aalg_tmpl_set(t, aalg) && aalg->available) 2216 sz += sizeof(struct sadb_comb); 2217 } 2218 return sz + sizeof(struct sadb_prop); 2219 } 2220 2221 static int count_esp_combs(struct xfrm_tmpl *t) 2222 { 2223 int i, k, sz = 0; 2224 2225 for (i = 0; ; i++) { 2226 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); 2227 if (!ealg) 2228 break; 2229 2230 if (!(ealg_tmpl_set(t, ealg) && ealg->available)) 2231 continue; 2232 2233 for (k = 1; ; k++) { 2234 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); 2235 if (!aalg) 2236 break; 2237 2238 if (aalg_tmpl_set(t, aalg) && aalg->available) 2239 sz += sizeof(struct sadb_comb); 2240 } 2241 } 2242 return sz + sizeof(struct sadb_prop); 2243 } 2244 2245 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t) 2246 { 2247 struct sadb_prop *p; 2248 int i; 2249 2250 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); 2251 p->sadb_prop_len = sizeof(struct sadb_prop)/8; 2252 p->sadb_prop_exttype = SADB_EXT_PROPOSAL; 2253 p->sadb_prop_replay = 32; 2254 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); 2255 2256 for (i = 0; ; i++) { 2257 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); 2258 if (!aalg) 2259 break; 2260 2261 if (aalg_tmpl_set(t, aalg) && aalg->available) { 2262 struct sadb_comb *c; 2263 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); 2264 memset(c, 0, sizeof(*c)); 2265 p->sadb_prop_len += sizeof(struct sadb_comb)/8; 2266 c->sadb_comb_auth = aalg->desc.sadb_alg_id; 2267 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; 2268 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; 2269 c->sadb_comb_hard_addtime = 24*60*60; 2270 c->sadb_comb_soft_addtime = 20*60*60; 2271 c->sadb_comb_hard_usetime = 8*60*60; 2272 c->sadb_comb_soft_usetime = 7*60*60; 2273 } 2274 } 2275 } 2276 2277 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t) 2278 { 2279 struct sadb_prop *p; 2280 int i, k; 2281 2282 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); 2283 p->sadb_prop_len = sizeof(struct sadb_prop)/8; 2284 p->sadb_prop_exttype = SADB_EXT_PROPOSAL; 2285 p->sadb_prop_replay = 32; 2286 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); 2287 2288 for (i=0; ; i++) { 2289 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); 2290 if (!ealg) 2291 break; 2292 2293 if (!(ealg_tmpl_set(t, ealg) && ealg->available)) 2294 continue; 2295 2296 for (k = 1; ; k++) { 2297 struct sadb_comb *c; 2298 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); 2299 if (!aalg) 2300 break; 2301 if (!(aalg_tmpl_set(t, aalg) && aalg->available)) 2302 continue; 2303 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); 2304 memset(c, 0, sizeof(*c)); 2305 p->sadb_prop_len += sizeof(struct sadb_comb)/8; 2306 c->sadb_comb_auth = aalg->desc.sadb_alg_id; 2307 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; 2308 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; 2309 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id; 2310 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits; 2311 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits; 2312 c->sadb_comb_hard_addtime = 24*60*60; 2313 c->sadb_comb_soft_addtime = 20*60*60; 2314 c->sadb_comb_hard_usetime = 8*60*60; 2315 c->sadb_comb_soft_usetime = 7*60*60; 2316 } 2317 } 2318 } 2319 2320 static int pfkey_send_notify(struct xfrm_state *x, int hard) 2321 { 2322 struct sk_buff *out_skb; 2323 struct sadb_msg *out_hdr; 2324 int hsc = (hard ? 2 : 1); 2325 2326 out_skb = pfkey_xfrm_state2msg(x, 0, hsc); 2327 if (IS_ERR(out_skb)) 2328 return PTR_ERR(out_skb); 2329 2330 out_hdr = (struct sadb_msg *) out_skb->data; 2331 out_hdr->sadb_msg_version = PF_KEY_V2; 2332 out_hdr->sadb_msg_type = SADB_EXPIRE; 2333 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); 2334 out_hdr->sadb_msg_errno = 0; 2335 out_hdr->sadb_msg_reserved = 0; 2336 out_hdr->sadb_msg_seq = 0; 2337 out_hdr->sadb_msg_pid = 0; 2338 2339 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); 2340 return 0; 2341 } 2342 2343 static u32 get_acqseq(void) 2344 { 2345 u32 res; 2346 static u32 acqseq; 2347 static DEFINE_SPINLOCK(acqseq_lock); 2348 2349 spin_lock_bh(&acqseq_lock); 2350 res = (++acqseq ? : ++acqseq); 2351 spin_unlock_bh(&acqseq_lock); 2352 return res; 2353 } 2354 2355 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir) 2356 { 2357 struct sk_buff *skb; 2358 struct sadb_msg *hdr; 2359 struct sadb_address *addr; 2360 struct sadb_x_policy *pol; 2361 struct sockaddr_in *sin; 2362 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 2363 struct sockaddr_in6 *sin6; 2364 #endif 2365 int sockaddr_size; 2366 int size; 2367 2368 sockaddr_size = pfkey_sockaddr_size(x->props.family); 2369 if (!sockaddr_size) 2370 return -EINVAL; 2371 2372 size = sizeof(struct sadb_msg) + 2373 (sizeof(struct sadb_address) * 2) + 2374 (sockaddr_size * 2) + 2375 sizeof(struct sadb_x_policy); 2376 2377 if (x->id.proto == IPPROTO_AH) 2378 size += count_ah_combs(t); 2379 else if (x->id.proto == IPPROTO_ESP) 2380 size += count_esp_combs(t); 2381 2382 skb = alloc_skb(size + 16, GFP_ATOMIC); 2383 if (skb == NULL) 2384 return -ENOMEM; 2385 2386 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); 2387 hdr->sadb_msg_version = PF_KEY_V2; 2388 hdr->sadb_msg_type = SADB_ACQUIRE; 2389 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); 2390 hdr->sadb_msg_len = size / sizeof(uint64_t); 2391 hdr->sadb_msg_errno = 0; 2392 hdr->sadb_msg_reserved = 0; 2393 hdr->sadb_msg_seq = x->km.seq = get_acqseq(); 2394 hdr->sadb_msg_pid = 0; 2395 2396 /* src address */ 2397 addr = (struct sadb_address*) skb_put(skb, 2398 sizeof(struct sadb_address)+sockaddr_size); 2399 addr->sadb_address_len = 2400 (sizeof(struct sadb_address)+sockaddr_size)/ 2401 sizeof(uint64_t); 2402 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; 2403 addr->sadb_address_proto = 0; 2404 addr->sadb_address_reserved = 0; 2405 if (x->props.family == AF_INET) { 2406 addr->sadb_address_prefixlen = 32; 2407 2408 sin = (struct sockaddr_in *) (addr + 1); 2409 sin->sin_family = AF_INET; 2410 sin->sin_addr.s_addr = x->props.saddr.a4; 2411 sin->sin_port = 0; 2412 memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); 2413 } 2414 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 2415 else if (x->props.family == AF_INET6) { 2416 addr->sadb_address_prefixlen = 128; 2417 2418 sin6 = (struct sockaddr_in6 *) (addr + 1); 2419 sin6->sin6_family = AF_INET6; 2420 sin6->sin6_port = 0; 2421 sin6->sin6_flowinfo = 0; 2422 memcpy(&sin6->sin6_addr, 2423 x->props.saddr.a6, sizeof(struct in6_addr)); 2424 sin6->sin6_scope_id = 0; 2425 } 2426 #endif 2427 else 2428 BUG(); 2429 2430 /* dst address */ 2431 addr = (struct sadb_address*) skb_put(skb, 2432 sizeof(struct sadb_address)+sockaddr_size); 2433 addr->sadb_address_len = 2434 (sizeof(struct sadb_address)+sockaddr_size)/ 2435 sizeof(uint64_t); 2436 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; 2437 addr->sadb_address_proto = 0; 2438 addr->sadb_address_reserved = 0; 2439 if (x->props.family == AF_INET) { 2440 addr->sadb_address_prefixlen = 32; 2441 2442 sin = (struct sockaddr_in *) (addr + 1); 2443 sin->sin_family = AF_INET; 2444 sin->sin_addr.s_addr = x->id.daddr.a4; 2445 sin->sin_port = 0; 2446 memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); 2447 } 2448 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 2449 else if (x->props.family == AF_INET6) { 2450 addr->sadb_address_prefixlen = 128; 2451 2452 sin6 = (struct sockaddr_in6 *) (addr + 1); 2453 sin6->sin6_family = AF_INET6; 2454 sin6->sin6_port = 0; 2455 sin6->sin6_flowinfo = 0; 2456 memcpy(&sin6->sin6_addr, 2457 x->id.daddr.a6, sizeof(struct in6_addr)); 2458 sin6->sin6_scope_id = 0; 2459 } 2460 #endif 2461 else 2462 BUG(); 2463 2464 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); 2465 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); 2466 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 2467 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; 2468 pol->sadb_x_policy_dir = dir+1; 2469 pol->sadb_x_policy_id = xp->index; 2470 2471 /* Set sadb_comb's. */ 2472 if (x->id.proto == IPPROTO_AH) 2473 dump_ah_combs(skb, t); 2474 else if (x->id.proto == IPPROTO_ESP) 2475 dump_esp_combs(skb, t); 2476 2477 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); 2478 } 2479 2480 static struct xfrm_policy *pfkey_compile_policy(u16 family, int opt, 2481 u8 *data, int len, int *dir) 2482 { 2483 struct xfrm_policy *xp; 2484 struct sadb_x_policy *pol = (struct sadb_x_policy*)data; 2485 2486 switch (family) { 2487 case AF_INET: 2488 if (opt != IP_IPSEC_POLICY) { 2489 *dir = -EOPNOTSUPP; 2490 return NULL; 2491 } 2492 break; 2493 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 2494 case AF_INET6: 2495 if (opt != IPV6_IPSEC_POLICY) { 2496 *dir = -EOPNOTSUPP; 2497 return NULL; 2498 } 2499 break; 2500 #endif 2501 default: 2502 *dir = -EINVAL; 2503 return NULL; 2504 } 2505 2506 *dir = -EINVAL; 2507 2508 if (len < sizeof(struct sadb_x_policy) || 2509 pol->sadb_x_policy_len*8 > len || 2510 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS || 2511 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND)) 2512 return NULL; 2513 2514 xp = xfrm_policy_alloc(GFP_ATOMIC); 2515 if (xp == NULL) { 2516 *dir = -ENOBUFS; 2517 return NULL; 2518 } 2519 2520 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? 2521 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); 2522 2523 xp->lft.soft_byte_limit = XFRM_INF; 2524 xp->lft.hard_byte_limit = XFRM_INF; 2525 xp->lft.soft_packet_limit = XFRM_INF; 2526 xp->lft.hard_packet_limit = XFRM_INF; 2527 xp->family = family; 2528 2529 xp->xfrm_nr = 0; 2530 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && 2531 (*dir = parse_ipsecrequests(xp, pol)) < 0) 2532 goto out; 2533 2534 *dir = pol->sadb_x_policy_dir-1; 2535 return xp; 2536 2537 out: 2538 kfree(xp); 2539 return NULL; 2540 } 2541 2542 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport) 2543 { 2544 struct sk_buff *skb; 2545 struct sadb_msg *hdr; 2546 struct sadb_sa *sa; 2547 struct sadb_address *addr; 2548 struct sadb_x_nat_t_port *n_port; 2549 struct sockaddr_in *sin; 2550 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 2551 struct sockaddr_in6 *sin6; 2552 #endif 2553 int sockaddr_size; 2554 int size; 2555 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0); 2556 struct xfrm_encap_tmpl *natt = NULL; 2557 2558 sockaddr_size = pfkey_sockaddr_size(x->props.family); 2559 if (!sockaddr_size) 2560 return -EINVAL; 2561 2562 if (!satype) 2563 return -EINVAL; 2564 2565 if (!x->encap) 2566 return -EINVAL; 2567 2568 natt = x->encap; 2569 2570 /* Build an SADB_X_NAT_T_NEW_MAPPING message: 2571 * 2572 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) | 2573 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port) 2574 */ 2575 2576 size = sizeof(struct sadb_msg) + 2577 sizeof(struct sadb_sa) + 2578 (sizeof(struct sadb_address) * 2) + 2579 (sockaddr_size * 2) + 2580 (sizeof(struct sadb_x_nat_t_port) * 2); 2581 2582 skb = alloc_skb(size + 16, GFP_ATOMIC); 2583 if (skb == NULL) 2584 return -ENOMEM; 2585 2586 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); 2587 hdr->sadb_msg_version = PF_KEY_V2; 2588 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING; 2589 hdr->sadb_msg_satype = satype; 2590 hdr->sadb_msg_len = size / sizeof(uint64_t); 2591 hdr->sadb_msg_errno = 0; 2592 hdr->sadb_msg_reserved = 0; 2593 hdr->sadb_msg_seq = x->km.seq = get_acqseq(); 2594 hdr->sadb_msg_pid = 0; 2595 2596 /* SA */ 2597 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); 2598 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); 2599 sa->sadb_sa_exttype = SADB_EXT_SA; 2600 sa->sadb_sa_spi = x->id.spi; 2601 sa->sadb_sa_replay = 0; 2602 sa->sadb_sa_state = 0; 2603 sa->sadb_sa_auth = 0; 2604 sa->sadb_sa_encrypt = 0; 2605 sa->sadb_sa_flags = 0; 2606 2607 /* ADDRESS_SRC (old addr) */ 2608 addr = (struct sadb_address*) 2609 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); 2610 addr->sadb_address_len = 2611 (sizeof(struct sadb_address)+sockaddr_size)/ 2612 sizeof(uint64_t); 2613 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; 2614 addr->sadb_address_proto = 0; 2615 addr->sadb_address_reserved = 0; 2616 if (x->props.family == AF_INET) { 2617 addr->sadb_address_prefixlen = 32; 2618 2619 sin = (struct sockaddr_in *) (addr + 1); 2620 sin->sin_family = AF_INET; 2621 sin->sin_addr.s_addr = x->props.saddr.a4; 2622 sin->sin_port = 0; 2623 memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); 2624 } 2625 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 2626 else if (x->props.family == AF_INET6) { 2627 addr->sadb_address_prefixlen = 128; 2628 2629 sin6 = (struct sockaddr_in6 *) (addr + 1); 2630 sin6->sin6_family = AF_INET6; 2631 sin6->sin6_port = 0; 2632 sin6->sin6_flowinfo = 0; 2633 memcpy(&sin6->sin6_addr, 2634 x->props.saddr.a6, sizeof(struct in6_addr)); 2635 sin6->sin6_scope_id = 0; 2636 } 2637 #endif 2638 else 2639 BUG(); 2640 2641 /* NAT_T_SPORT (old port) */ 2642 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); 2643 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); 2644 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; 2645 n_port->sadb_x_nat_t_port_port = natt->encap_sport; 2646 n_port->sadb_x_nat_t_port_reserved = 0; 2647 2648 /* ADDRESS_DST (new addr) */ 2649 addr = (struct sadb_address*) 2650 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); 2651 addr->sadb_address_len = 2652 (sizeof(struct sadb_address)+sockaddr_size)/ 2653 sizeof(uint64_t); 2654 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; 2655 addr->sadb_address_proto = 0; 2656 addr->sadb_address_reserved = 0; 2657 if (x->props.family == AF_INET) { 2658 addr->sadb_address_prefixlen = 32; 2659 2660 sin = (struct sockaddr_in *) (addr + 1); 2661 sin->sin_family = AF_INET; 2662 sin->sin_addr.s_addr = ipaddr->a4; 2663 sin->sin_port = 0; 2664 memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); 2665 } 2666 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 2667 else if (x->props.family == AF_INET6) { 2668 addr->sadb_address_prefixlen = 128; 2669 2670 sin6 = (struct sockaddr_in6 *) (addr + 1); 2671 sin6->sin6_family = AF_INET6; 2672 sin6->sin6_port = 0; 2673 sin6->sin6_flowinfo = 0; 2674 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr)); 2675 sin6->sin6_scope_id = 0; 2676 } 2677 #endif 2678 else 2679 BUG(); 2680 2681 /* NAT_T_DPORT (new port) */ 2682 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); 2683 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); 2684 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; 2685 n_port->sadb_x_nat_t_port_port = sport; 2686 n_port->sadb_x_nat_t_port_reserved = 0; 2687 2688 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); 2689 } 2690 2691 static int pfkey_sendmsg(struct kiocb *kiocb, 2692 struct socket *sock, struct msghdr *msg, size_t len) 2693 { 2694 struct sock *sk = sock->sk; 2695 struct sk_buff *skb = NULL; 2696 struct sadb_msg *hdr = NULL; 2697 int err; 2698 2699 err = -EOPNOTSUPP; 2700 if (msg->msg_flags & MSG_OOB) 2701 goto out; 2702 2703 err = -EMSGSIZE; 2704 if ((unsigned)len > sk->sk_sndbuf - 32) 2705 goto out; 2706 2707 err = -ENOBUFS; 2708 skb = alloc_skb(len, GFP_KERNEL); 2709 if (skb == NULL) 2710 goto out; 2711 2712 err = -EFAULT; 2713 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len)) 2714 goto out; 2715 2716 hdr = pfkey_get_base_msg(skb, &err); 2717 if (!hdr) 2718 goto out; 2719 2720 down(&xfrm_cfg_sem); 2721 err = pfkey_process(sk, skb, hdr); 2722 up(&xfrm_cfg_sem); 2723 2724 out: 2725 if (err && hdr && pfkey_error(hdr, err, sk) == 0) 2726 err = 0; 2727 if (skb) 2728 kfree_skb(skb); 2729 2730 return err ? : len; 2731 } 2732 2733 static int pfkey_recvmsg(struct kiocb *kiocb, 2734 struct socket *sock, struct msghdr *msg, size_t len, 2735 int flags) 2736 { 2737 struct sock *sk = sock->sk; 2738 struct sk_buff *skb; 2739 int copied, err; 2740 2741 err = -EINVAL; 2742 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT)) 2743 goto out; 2744 2745 msg->msg_namelen = 0; 2746 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err); 2747 if (skb == NULL) 2748 goto out; 2749 2750 copied = skb->len; 2751 if (copied > len) { 2752 msg->msg_flags |= MSG_TRUNC; 2753 copied = len; 2754 } 2755 2756 skb->h.raw = skb->data; 2757 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 2758 if (err) 2759 goto out_free; 2760 2761 sock_recv_timestamp(msg, sk, skb); 2762 2763 err = (flags & MSG_TRUNC) ? skb->len : copied; 2764 2765 out_free: 2766 skb_free_datagram(sk, skb); 2767 out: 2768 return err; 2769 } 2770 2771 static struct proto_ops pfkey_ops = { 2772 .family = PF_KEY, 2773 .owner = THIS_MODULE, 2774 /* Operations that make no sense on pfkey sockets. */ 2775 .bind = sock_no_bind, 2776 .connect = sock_no_connect, 2777 .socketpair = sock_no_socketpair, 2778 .accept = sock_no_accept, 2779 .getname = sock_no_getname, 2780 .ioctl = sock_no_ioctl, 2781 .listen = sock_no_listen, 2782 .shutdown = sock_no_shutdown, 2783 .setsockopt = sock_no_setsockopt, 2784 .getsockopt = sock_no_getsockopt, 2785 .mmap = sock_no_mmap, 2786 .sendpage = sock_no_sendpage, 2787 2788 /* Now the operations that really occur. */ 2789 .release = pfkey_release, 2790 .poll = datagram_poll, 2791 .sendmsg = pfkey_sendmsg, 2792 .recvmsg = pfkey_recvmsg, 2793 }; 2794 2795 static struct net_proto_family pfkey_family_ops = { 2796 .family = PF_KEY, 2797 .create = pfkey_create, 2798 .owner = THIS_MODULE, 2799 }; 2800 2801 #ifdef CONFIG_PROC_FS 2802 static int pfkey_read_proc(char *buffer, char **start, off_t offset, 2803 int length, int *eof, void *data) 2804 { 2805 off_t pos = 0; 2806 off_t begin = 0; 2807 int len = 0; 2808 struct sock *s; 2809 struct hlist_node *node; 2810 2811 len += sprintf(buffer,"sk RefCnt Rmem Wmem User Inode\n"); 2812 2813 read_lock(&pfkey_table_lock); 2814 2815 sk_for_each(s, node, &pfkey_table) { 2816 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu", 2817 s, 2818 atomic_read(&s->sk_refcnt), 2819 atomic_read(&s->sk_rmem_alloc), 2820 atomic_read(&s->sk_wmem_alloc), 2821 sock_i_uid(s), 2822 sock_i_ino(s) 2823 ); 2824 2825 buffer[len++] = '\n'; 2826 2827 pos = begin + len; 2828 if (pos < offset) { 2829 len = 0; 2830 begin = pos; 2831 } 2832 if(pos > offset + length) 2833 goto done; 2834 } 2835 *eof = 1; 2836 2837 done: 2838 read_unlock(&pfkey_table_lock); 2839 2840 *start = buffer + (offset - begin); 2841 len -= (offset - begin); 2842 2843 if (len > length) 2844 len = length; 2845 if (len < 0) 2846 len = 0; 2847 2848 return len; 2849 } 2850 #endif 2851 2852 static struct xfrm_mgr pfkeyv2_mgr = 2853 { 2854 .id = "pfkeyv2", 2855 .notify = pfkey_send_notify, 2856 .acquire = pfkey_send_acquire, 2857 .compile_policy = pfkey_compile_policy, 2858 .new_mapping = pfkey_send_new_mapping, 2859 }; 2860 2861 static void __exit ipsec_pfkey_exit(void) 2862 { 2863 xfrm_unregister_km(&pfkeyv2_mgr); 2864 remove_proc_entry("net/pfkey", NULL); 2865 sock_unregister(PF_KEY); 2866 proto_unregister(&key_proto); 2867 } 2868 2869 static int __init ipsec_pfkey_init(void) 2870 { 2871 int err = proto_register(&key_proto, 0); 2872 2873 if (err != 0) 2874 goto out; 2875 2876 err = sock_register(&pfkey_family_ops); 2877 if (err != 0) 2878 goto out_unregister_key_proto; 2879 #ifdef CONFIG_PROC_FS 2880 err = -ENOMEM; 2881 if (create_proc_read_entry("net/pfkey", 0, NULL, pfkey_read_proc, NULL) == NULL) 2882 goto out_sock_unregister; 2883 #endif 2884 err = xfrm_register_km(&pfkeyv2_mgr); 2885 if (err != 0) 2886 goto out_remove_proc_entry; 2887 out: 2888 return err; 2889 out_remove_proc_entry: 2890 #ifdef CONFIG_PROC_FS 2891 remove_proc_entry("net/pfkey", NULL); 2892 out_sock_unregister: 2893 #endif 2894 sock_unregister(PF_KEY); 2895 out_unregister_key_proto: 2896 proto_unregister(&key_proto); 2897 goto out; 2898 } 2899 2900 module_init(ipsec_pfkey_init); 2901 module_exit(ipsec_pfkey_exit); 2902 MODULE_LICENSE("GPL"); 2903 MODULE_ALIAS_NETPROTO(PF_KEY); 2904