1 /* 2 * net/key/af_key.c An implementation of PF_KEYv2 sockets. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 * 9 * Authors: Maxim Giryaev <gem@asplinux.ru> 10 * David S. Miller <davem@redhat.com> 11 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> 12 * Kunihiro Ishiguro <kunihiro@ipinfusion.com> 13 * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org> 14 * Derek Atkins <derek@ihtfp.com> 15 */ 16 17 #include <linux/capability.h> 18 #include <linux/module.h> 19 #include <linux/kernel.h> 20 #include <linux/socket.h> 21 #include <linux/pfkeyv2.h> 22 #include <linux/ipsec.h> 23 #include <linux/skbuff.h> 24 #include <linux/rtnetlink.h> 25 #include <linux/in.h> 26 #include <linux/in6.h> 27 #include <linux/proc_fs.h> 28 #include <linux/init.h> 29 #include <net/net_namespace.h> 30 #include <net/xfrm.h> 31 32 #include <net/sock.h> 33 34 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x)) 35 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x)) 36 37 38 /* List of all pfkey sockets. */ 39 static HLIST_HEAD(pfkey_table); 40 static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait); 41 static DEFINE_RWLOCK(pfkey_table_lock); 42 static atomic_t pfkey_table_users = ATOMIC_INIT(0); 43 44 static atomic_t pfkey_socks_nr = ATOMIC_INIT(0); 45 46 struct pfkey_sock { 47 /* struct sock must be the first member of struct pfkey_sock */ 48 struct sock sk; 49 int registered; 50 int promisc; 51 52 struct { 53 uint8_t msg_version; 54 uint32_t msg_pid; 55 int (*dump)(struct pfkey_sock *sk); 56 void (*done)(struct pfkey_sock *sk); 57 union { 58 struct xfrm_policy_walk policy; 59 struct xfrm_state_walk state; 60 } u; 61 } dump; 62 }; 63 64 static inline struct pfkey_sock *pfkey_sk(struct sock *sk) 65 { 66 return (struct pfkey_sock *)sk; 67 } 68 69 static int pfkey_can_dump(struct sock *sk) 70 { 71 if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf) 72 return 1; 73 return 0; 74 } 75 76 static int pfkey_do_dump(struct pfkey_sock *pfk) 77 { 78 int rc; 79 80 rc = pfk->dump.dump(pfk); 81 if (rc == -ENOBUFS) 82 return 0; 83 84 pfk->dump.done(pfk); 85 pfk->dump.dump = NULL; 86 pfk->dump.done = NULL; 87 return rc; 88 } 89 90 static void pfkey_sock_destruct(struct sock *sk) 91 { 92 skb_queue_purge(&sk->sk_receive_queue); 93 94 if (!sock_flag(sk, SOCK_DEAD)) { 95 printk("Attempt to release alive pfkey socket: %p\n", sk); 96 return; 97 } 98 99 BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc)); 100 BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc)); 101 102 atomic_dec(&pfkey_socks_nr); 103 } 104 105 static void pfkey_table_grab(void) 106 { 107 write_lock_bh(&pfkey_table_lock); 108 109 if (atomic_read(&pfkey_table_users)) { 110 DECLARE_WAITQUEUE(wait, current); 111 112 add_wait_queue_exclusive(&pfkey_table_wait, &wait); 113 for(;;) { 114 set_current_state(TASK_UNINTERRUPTIBLE); 115 if (atomic_read(&pfkey_table_users) == 0) 116 break; 117 write_unlock_bh(&pfkey_table_lock); 118 schedule(); 119 write_lock_bh(&pfkey_table_lock); 120 } 121 122 __set_current_state(TASK_RUNNING); 123 remove_wait_queue(&pfkey_table_wait, &wait); 124 } 125 } 126 127 static __inline__ void pfkey_table_ungrab(void) 128 { 129 write_unlock_bh(&pfkey_table_lock); 130 wake_up(&pfkey_table_wait); 131 } 132 133 static __inline__ void pfkey_lock_table(void) 134 { 135 /* read_lock() synchronizes us to pfkey_table_grab */ 136 137 read_lock(&pfkey_table_lock); 138 atomic_inc(&pfkey_table_users); 139 read_unlock(&pfkey_table_lock); 140 } 141 142 static __inline__ void pfkey_unlock_table(void) 143 { 144 if (atomic_dec_and_test(&pfkey_table_users)) 145 wake_up(&pfkey_table_wait); 146 } 147 148 149 static const struct proto_ops pfkey_ops; 150 151 static void pfkey_insert(struct sock *sk) 152 { 153 pfkey_table_grab(); 154 sk_add_node(sk, &pfkey_table); 155 pfkey_table_ungrab(); 156 } 157 158 static void pfkey_remove(struct sock *sk) 159 { 160 pfkey_table_grab(); 161 sk_del_node_init(sk); 162 pfkey_table_ungrab(); 163 } 164 165 static struct proto key_proto = { 166 .name = "KEY", 167 .owner = THIS_MODULE, 168 .obj_size = sizeof(struct pfkey_sock), 169 }; 170 171 static int pfkey_create(struct net *net, struct socket *sock, int protocol) 172 { 173 struct sock *sk; 174 int err; 175 176 if (net != &init_net) 177 return -EAFNOSUPPORT; 178 179 if (!capable(CAP_NET_ADMIN)) 180 return -EPERM; 181 if (sock->type != SOCK_RAW) 182 return -ESOCKTNOSUPPORT; 183 if (protocol != PF_KEY_V2) 184 return -EPROTONOSUPPORT; 185 186 err = -ENOMEM; 187 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto); 188 if (sk == NULL) 189 goto out; 190 191 sock->ops = &pfkey_ops; 192 sock_init_data(sock, sk); 193 194 sk->sk_family = PF_KEY; 195 sk->sk_destruct = pfkey_sock_destruct; 196 197 atomic_inc(&pfkey_socks_nr); 198 199 pfkey_insert(sk); 200 201 return 0; 202 out: 203 return err; 204 } 205 206 static int pfkey_release(struct socket *sock) 207 { 208 struct sock *sk = sock->sk; 209 210 if (!sk) 211 return 0; 212 213 pfkey_remove(sk); 214 215 sock_orphan(sk); 216 sock->sk = NULL; 217 skb_queue_purge(&sk->sk_write_queue); 218 sock_put(sk); 219 220 return 0; 221 } 222 223 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2, 224 gfp_t allocation, struct sock *sk) 225 { 226 int err = -ENOBUFS; 227 228 sock_hold(sk); 229 if (*skb2 == NULL) { 230 if (atomic_read(&skb->users) != 1) { 231 *skb2 = skb_clone(skb, allocation); 232 } else { 233 *skb2 = skb; 234 atomic_inc(&skb->users); 235 } 236 } 237 if (*skb2 != NULL) { 238 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) { 239 skb_orphan(*skb2); 240 skb_set_owner_r(*skb2, sk); 241 skb_queue_tail(&sk->sk_receive_queue, *skb2); 242 sk->sk_data_ready(sk, (*skb2)->len); 243 *skb2 = NULL; 244 err = 0; 245 } 246 } 247 sock_put(sk); 248 return err; 249 } 250 251 /* Send SKB to all pfkey sockets matching selected criteria. */ 252 #define BROADCAST_ALL 0 253 #define BROADCAST_ONE 1 254 #define BROADCAST_REGISTERED 2 255 #define BROADCAST_PROMISC_ONLY 4 256 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation, 257 int broadcast_flags, struct sock *one_sk) 258 { 259 struct sock *sk; 260 struct hlist_node *node; 261 struct sk_buff *skb2 = NULL; 262 int err = -ESRCH; 263 264 /* XXX Do we need something like netlink_overrun? I think 265 * XXX PF_KEY socket apps will not mind current behavior. 266 */ 267 if (!skb) 268 return -ENOMEM; 269 270 pfkey_lock_table(); 271 sk_for_each(sk, node, &pfkey_table) { 272 struct pfkey_sock *pfk = pfkey_sk(sk); 273 int err2; 274 275 /* Yes, it means that if you are meant to receive this 276 * pfkey message you receive it twice as promiscuous 277 * socket. 278 */ 279 if (pfk->promisc) 280 pfkey_broadcast_one(skb, &skb2, allocation, sk); 281 282 /* the exact target will be processed later */ 283 if (sk == one_sk) 284 continue; 285 if (broadcast_flags != BROADCAST_ALL) { 286 if (broadcast_flags & BROADCAST_PROMISC_ONLY) 287 continue; 288 if ((broadcast_flags & BROADCAST_REGISTERED) && 289 !pfk->registered) 290 continue; 291 if (broadcast_flags & BROADCAST_ONE) 292 continue; 293 } 294 295 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk); 296 297 /* Error is cleare after succecful sending to at least one 298 * registered KM */ 299 if ((broadcast_flags & BROADCAST_REGISTERED) && err) 300 err = err2; 301 } 302 pfkey_unlock_table(); 303 304 if (one_sk != NULL) 305 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk); 306 307 if (skb2) 308 kfree_skb(skb2); 309 kfree_skb(skb); 310 return err; 311 } 312 313 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig) 314 { 315 *new = *orig; 316 } 317 318 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk) 319 { 320 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL); 321 struct sadb_msg *hdr; 322 323 if (!skb) 324 return -ENOBUFS; 325 326 /* Woe be to the platform trying to support PFKEY yet 327 * having normal errnos outside the 1-255 range, inclusive. 328 */ 329 err = -err; 330 if (err == ERESTARTSYS || 331 err == ERESTARTNOHAND || 332 err == ERESTARTNOINTR) 333 err = EINTR; 334 if (err >= 512) 335 err = EINVAL; 336 BUG_ON(err <= 0 || err >= 256); 337 338 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); 339 pfkey_hdr_dup(hdr, orig); 340 hdr->sadb_msg_errno = (uint8_t) err; 341 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / 342 sizeof(uint64_t)); 343 344 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk); 345 346 return 0; 347 } 348 349 static u8 sadb_ext_min_len[] = { 350 [SADB_EXT_RESERVED] = (u8) 0, 351 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa), 352 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime), 353 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime), 354 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime), 355 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address), 356 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address), 357 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address), 358 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key), 359 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key), 360 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident), 361 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident), 362 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens), 363 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop), 364 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported), 365 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported), 366 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange), 367 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate), 368 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy), 369 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2), 370 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type), 371 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port), 372 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port), 373 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address), 374 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx), 375 }; 376 377 /* Verify sadb_address_{len,prefixlen} against sa_family. */ 378 static int verify_address_len(void *p) 379 { 380 struct sadb_address *sp = p; 381 struct sockaddr *addr = (struct sockaddr *)(sp + 1); 382 struct sockaddr_in *sin; 383 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 384 struct sockaddr_in6 *sin6; 385 #endif 386 int len; 387 388 switch (addr->sa_family) { 389 case AF_INET: 390 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t)); 391 if (sp->sadb_address_len != len || 392 sp->sadb_address_prefixlen > 32) 393 return -EINVAL; 394 break; 395 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 396 case AF_INET6: 397 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t)); 398 if (sp->sadb_address_len != len || 399 sp->sadb_address_prefixlen > 128) 400 return -EINVAL; 401 break; 402 #endif 403 default: 404 /* It is user using kernel to keep track of security 405 * associations for another protocol, such as 406 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify 407 * lengths. 408 * 409 * XXX Actually, association/policy database is not yet 410 * XXX able to cope with arbitrary sockaddr families. 411 * XXX When it can, remove this -EINVAL. -DaveM 412 */ 413 return -EINVAL; 414 break; 415 } 416 417 return 0; 418 } 419 420 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx) 421 { 422 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) + 423 sec_ctx->sadb_x_ctx_len, 424 sizeof(uint64_t)); 425 } 426 427 static inline int verify_sec_ctx_len(void *p) 428 { 429 struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p; 430 int len = sec_ctx->sadb_x_ctx_len; 431 432 if (len > PAGE_SIZE) 433 return -EINVAL; 434 435 len = pfkey_sec_ctx_len(sec_ctx); 436 437 if (sec_ctx->sadb_x_sec_len != len) 438 return -EINVAL; 439 440 return 0; 441 } 442 443 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx) 444 { 445 struct xfrm_user_sec_ctx *uctx = NULL; 446 int ctx_size = sec_ctx->sadb_x_ctx_len; 447 448 uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL); 449 450 if (!uctx) 451 return NULL; 452 453 uctx->len = pfkey_sec_ctx_len(sec_ctx); 454 uctx->exttype = sec_ctx->sadb_x_sec_exttype; 455 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi; 456 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg; 457 uctx->ctx_len = sec_ctx->sadb_x_ctx_len; 458 memcpy(uctx + 1, sec_ctx + 1, 459 uctx->ctx_len); 460 461 return uctx; 462 } 463 464 static int present_and_same_family(struct sadb_address *src, 465 struct sadb_address *dst) 466 { 467 struct sockaddr *s_addr, *d_addr; 468 469 if (!src || !dst) 470 return 0; 471 472 s_addr = (struct sockaddr *)(src + 1); 473 d_addr = (struct sockaddr *)(dst + 1); 474 if (s_addr->sa_family != d_addr->sa_family) 475 return 0; 476 if (s_addr->sa_family != AF_INET 477 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 478 && s_addr->sa_family != AF_INET6 479 #endif 480 ) 481 return 0; 482 483 return 1; 484 } 485 486 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 487 { 488 char *p = (char *) hdr; 489 int len = skb->len; 490 491 len -= sizeof(*hdr); 492 p += sizeof(*hdr); 493 while (len > 0) { 494 struct sadb_ext *ehdr = (struct sadb_ext *) p; 495 uint16_t ext_type; 496 int ext_len; 497 498 ext_len = ehdr->sadb_ext_len; 499 ext_len *= sizeof(uint64_t); 500 ext_type = ehdr->sadb_ext_type; 501 if (ext_len < sizeof(uint64_t) || 502 ext_len > len || 503 ext_type == SADB_EXT_RESERVED) 504 return -EINVAL; 505 506 if (ext_type <= SADB_EXT_MAX) { 507 int min = (int) sadb_ext_min_len[ext_type]; 508 if (ext_len < min) 509 return -EINVAL; 510 if (ext_hdrs[ext_type-1] != NULL) 511 return -EINVAL; 512 if (ext_type == SADB_EXT_ADDRESS_SRC || 513 ext_type == SADB_EXT_ADDRESS_DST || 514 ext_type == SADB_EXT_ADDRESS_PROXY || 515 ext_type == SADB_X_EXT_NAT_T_OA) { 516 if (verify_address_len(p)) 517 return -EINVAL; 518 } 519 if (ext_type == SADB_X_EXT_SEC_CTX) { 520 if (verify_sec_ctx_len(p)) 521 return -EINVAL; 522 } 523 ext_hdrs[ext_type-1] = p; 524 } 525 p += ext_len; 526 len -= ext_len; 527 } 528 529 return 0; 530 } 531 532 static uint16_t 533 pfkey_satype2proto(uint8_t satype) 534 { 535 switch (satype) { 536 case SADB_SATYPE_UNSPEC: 537 return IPSEC_PROTO_ANY; 538 case SADB_SATYPE_AH: 539 return IPPROTO_AH; 540 case SADB_SATYPE_ESP: 541 return IPPROTO_ESP; 542 case SADB_X_SATYPE_IPCOMP: 543 return IPPROTO_COMP; 544 break; 545 default: 546 return 0; 547 } 548 /* NOTREACHED */ 549 } 550 551 static uint8_t 552 pfkey_proto2satype(uint16_t proto) 553 { 554 switch (proto) { 555 case IPPROTO_AH: 556 return SADB_SATYPE_AH; 557 case IPPROTO_ESP: 558 return SADB_SATYPE_ESP; 559 case IPPROTO_COMP: 560 return SADB_X_SATYPE_IPCOMP; 561 break; 562 default: 563 return 0; 564 } 565 /* NOTREACHED */ 566 } 567 568 /* BTW, this scheme means that there is no way with PFKEY2 sockets to 569 * say specifically 'just raw sockets' as we encode them as 255. 570 */ 571 572 static uint8_t pfkey_proto_to_xfrm(uint8_t proto) 573 { 574 return (proto == IPSEC_PROTO_ANY ? 0 : proto); 575 } 576 577 static uint8_t pfkey_proto_from_xfrm(uint8_t proto) 578 { 579 return (proto ? proto : IPSEC_PROTO_ANY); 580 } 581 582 static inline int pfkey_sockaddr_len(sa_family_t family) 583 { 584 switch (family) { 585 case AF_INET: 586 return sizeof(struct sockaddr_in); 587 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 588 case AF_INET6: 589 return sizeof(struct sockaddr_in6); 590 #endif 591 } 592 return 0; 593 } 594 595 static 596 int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr) 597 { 598 switch (sa->sa_family) { 599 case AF_INET: 600 xaddr->a4 = 601 ((struct sockaddr_in *)sa)->sin_addr.s_addr; 602 return AF_INET; 603 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 604 case AF_INET6: 605 memcpy(xaddr->a6, 606 &((struct sockaddr_in6 *)sa)->sin6_addr, 607 sizeof(struct in6_addr)); 608 return AF_INET6; 609 #endif 610 } 611 return 0; 612 } 613 614 static 615 int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr, xfrm_address_t *xaddr) 616 { 617 return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1), 618 xaddr); 619 } 620 621 static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs) 622 { 623 struct sadb_sa *sa; 624 struct sadb_address *addr; 625 uint16_t proto; 626 unsigned short family; 627 xfrm_address_t *xaddr; 628 629 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; 630 if (sa == NULL) 631 return NULL; 632 633 proto = pfkey_satype2proto(hdr->sadb_msg_satype); 634 if (proto == 0) 635 return NULL; 636 637 /* sadb_address_len should be checked by caller */ 638 addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1]; 639 if (addr == NULL) 640 return NULL; 641 642 family = ((struct sockaddr *)(addr + 1))->sa_family; 643 switch (family) { 644 case AF_INET: 645 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr; 646 break; 647 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 648 case AF_INET6: 649 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr; 650 break; 651 #endif 652 default: 653 xaddr = NULL; 654 } 655 656 if (!xaddr) 657 return NULL; 658 659 return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family); 660 } 661 662 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1))) 663 664 static int 665 pfkey_sockaddr_size(sa_family_t family) 666 { 667 return PFKEY_ALIGN8(pfkey_sockaddr_len(family)); 668 } 669 670 static inline int pfkey_mode_from_xfrm(int mode) 671 { 672 switch(mode) { 673 case XFRM_MODE_TRANSPORT: 674 return IPSEC_MODE_TRANSPORT; 675 case XFRM_MODE_TUNNEL: 676 return IPSEC_MODE_TUNNEL; 677 case XFRM_MODE_BEET: 678 return IPSEC_MODE_BEET; 679 default: 680 return -1; 681 } 682 } 683 684 static inline int pfkey_mode_to_xfrm(int mode) 685 { 686 switch(mode) { 687 case IPSEC_MODE_ANY: /*XXX*/ 688 case IPSEC_MODE_TRANSPORT: 689 return XFRM_MODE_TRANSPORT; 690 case IPSEC_MODE_TUNNEL: 691 return XFRM_MODE_TUNNEL; 692 case IPSEC_MODE_BEET: 693 return XFRM_MODE_BEET; 694 default: 695 return -1; 696 } 697 } 698 699 static unsigned int pfkey_sockaddr_fill(xfrm_address_t *xaddr, __be16 port, 700 struct sockaddr *sa, 701 unsigned short family) 702 { 703 switch (family) { 704 case AF_INET: 705 { 706 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 707 sin->sin_family = AF_INET; 708 sin->sin_port = port; 709 sin->sin_addr.s_addr = xaddr->a4; 710 memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); 711 return 32; 712 } 713 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 714 case AF_INET6: 715 { 716 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 717 sin6->sin6_family = AF_INET6; 718 sin6->sin6_port = port; 719 sin6->sin6_flowinfo = 0; 720 ipv6_addr_copy(&sin6->sin6_addr, (struct in6_addr *)xaddr->a6); 721 sin6->sin6_scope_id = 0; 722 return 128; 723 } 724 #endif 725 } 726 return 0; 727 } 728 729 static struct sk_buff *__pfkey_xfrm_state2msg(struct xfrm_state *x, 730 int add_keys, int hsc) 731 { 732 struct sk_buff *skb; 733 struct sadb_msg *hdr; 734 struct sadb_sa *sa; 735 struct sadb_lifetime *lifetime; 736 struct sadb_address *addr; 737 struct sadb_key *key; 738 struct sadb_x_sa2 *sa2; 739 struct sadb_x_sec_ctx *sec_ctx; 740 struct xfrm_sec_ctx *xfrm_ctx; 741 int ctx_size = 0; 742 int size; 743 int auth_key_size = 0; 744 int encrypt_key_size = 0; 745 int sockaddr_size; 746 struct xfrm_encap_tmpl *natt = NULL; 747 int mode; 748 749 /* address family check */ 750 sockaddr_size = pfkey_sockaddr_size(x->props.family); 751 if (!sockaddr_size) 752 return ERR_PTR(-EINVAL); 753 754 /* base, SA, (lifetime (HSC),) address(SD), (address(P),) 755 key(AE), (identity(SD),) (sensitivity)> */ 756 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) + 757 sizeof(struct sadb_lifetime) + 758 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) + 759 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) + 760 sizeof(struct sadb_address)*2 + 761 sockaddr_size*2 + 762 sizeof(struct sadb_x_sa2); 763 764 if ((xfrm_ctx = x->security)) { 765 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); 766 size += sizeof(struct sadb_x_sec_ctx) + ctx_size; 767 } 768 769 /* identity & sensitivity */ 770 if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, x->props.family)) 771 size += sizeof(struct sadb_address) + sockaddr_size; 772 773 if (add_keys) { 774 if (x->aalg && x->aalg->alg_key_len) { 775 auth_key_size = 776 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8); 777 size += sizeof(struct sadb_key) + auth_key_size; 778 } 779 if (x->ealg && x->ealg->alg_key_len) { 780 encrypt_key_size = 781 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8); 782 size += sizeof(struct sadb_key) + encrypt_key_size; 783 } 784 } 785 if (x->encap) 786 natt = x->encap; 787 788 if (natt && natt->encap_type) { 789 size += sizeof(struct sadb_x_nat_t_type); 790 size += sizeof(struct sadb_x_nat_t_port); 791 size += sizeof(struct sadb_x_nat_t_port); 792 } 793 794 skb = alloc_skb(size + 16, GFP_ATOMIC); 795 if (skb == NULL) 796 return ERR_PTR(-ENOBUFS); 797 798 /* call should fill header later */ 799 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); 800 memset(hdr, 0, size); /* XXX do we need this ? */ 801 hdr->sadb_msg_len = size / sizeof(uint64_t); 802 803 /* sa */ 804 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); 805 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); 806 sa->sadb_sa_exttype = SADB_EXT_SA; 807 sa->sadb_sa_spi = x->id.spi; 808 sa->sadb_sa_replay = x->props.replay_window; 809 switch (x->km.state) { 810 case XFRM_STATE_VALID: 811 sa->sadb_sa_state = x->km.dying ? 812 SADB_SASTATE_DYING : SADB_SASTATE_MATURE; 813 break; 814 case XFRM_STATE_ACQ: 815 sa->sadb_sa_state = SADB_SASTATE_LARVAL; 816 break; 817 default: 818 sa->sadb_sa_state = SADB_SASTATE_DEAD; 819 break; 820 } 821 sa->sadb_sa_auth = 0; 822 if (x->aalg) { 823 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0); 824 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0; 825 } 826 sa->sadb_sa_encrypt = 0; 827 BUG_ON(x->ealg && x->calg); 828 if (x->ealg) { 829 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0); 830 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; 831 } 832 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */ 833 if (x->calg) { 834 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0); 835 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; 836 } 837 838 sa->sadb_sa_flags = 0; 839 if (x->props.flags & XFRM_STATE_NOECN) 840 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN; 841 if (x->props.flags & XFRM_STATE_DECAP_DSCP) 842 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP; 843 if (x->props.flags & XFRM_STATE_NOPMTUDISC) 844 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC; 845 846 /* hard time */ 847 if (hsc & 2) { 848 lifetime = (struct sadb_lifetime *) skb_put(skb, 849 sizeof(struct sadb_lifetime)); 850 lifetime->sadb_lifetime_len = 851 sizeof(struct sadb_lifetime)/sizeof(uint64_t); 852 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 853 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit); 854 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit); 855 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds; 856 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds; 857 } 858 /* soft time */ 859 if (hsc & 1) { 860 lifetime = (struct sadb_lifetime *) skb_put(skb, 861 sizeof(struct sadb_lifetime)); 862 lifetime->sadb_lifetime_len = 863 sizeof(struct sadb_lifetime)/sizeof(uint64_t); 864 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; 865 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit); 866 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit); 867 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds; 868 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds; 869 } 870 /* current time */ 871 lifetime = (struct sadb_lifetime *) skb_put(skb, 872 sizeof(struct sadb_lifetime)); 873 lifetime->sadb_lifetime_len = 874 sizeof(struct sadb_lifetime)/sizeof(uint64_t); 875 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 876 lifetime->sadb_lifetime_allocations = x->curlft.packets; 877 lifetime->sadb_lifetime_bytes = x->curlft.bytes; 878 lifetime->sadb_lifetime_addtime = x->curlft.add_time; 879 lifetime->sadb_lifetime_usetime = x->curlft.use_time; 880 /* src address */ 881 addr = (struct sadb_address*) skb_put(skb, 882 sizeof(struct sadb_address)+sockaddr_size); 883 addr->sadb_address_len = 884 (sizeof(struct sadb_address)+sockaddr_size)/ 885 sizeof(uint64_t); 886 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; 887 /* "if the ports are non-zero, then the sadb_address_proto field, 888 normally zero, MUST be filled in with the transport 889 protocol's number." - RFC2367 */ 890 addr->sadb_address_proto = 0; 891 addr->sadb_address_reserved = 0; 892 893 addr->sadb_address_prefixlen = 894 pfkey_sockaddr_fill(&x->props.saddr, 0, 895 (struct sockaddr *) (addr + 1), 896 x->props.family); 897 if (!addr->sadb_address_prefixlen) 898 BUG(); 899 900 /* dst address */ 901 addr = (struct sadb_address*) skb_put(skb, 902 sizeof(struct sadb_address)+sockaddr_size); 903 addr->sadb_address_len = 904 (sizeof(struct sadb_address)+sockaddr_size)/ 905 sizeof(uint64_t); 906 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; 907 addr->sadb_address_proto = 0; 908 addr->sadb_address_reserved = 0; 909 910 addr->sadb_address_prefixlen = 911 pfkey_sockaddr_fill(&x->id.daddr, 0, 912 (struct sockaddr *) (addr + 1), 913 x->props.family); 914 if (!addr->sadb_address_prefixlen) 915 BUG(); 916 917 if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, 918 x->props.family)) { 919 addr = (struct sadb_address*) skb_put(skb, 920 sizeof(struct sadb_address)+sockaddr_size); 921 addr->sadb_address_len = 922 (sizeof(struct sadb_address)+sockaddr_size)/ 923 sizeof(uint64_t); 924 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; 925 addr->sadb_address_proto = 926 pfkey_proto_from_xfrm(x->sel.proto); 927 addr->sadb_address_prefixlen = x->sel.prefixlen_s; 928 addr->sadb_address_reserved = 0; 929 930 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport, 931 (struct sockaddr *) (addr + 1), 932 x->props.family); 933 } 934 935 /* auth key */ 936 if (add_keys && auth_key_size) { 937 key = (struct sadb_key *) skb_put(skb, 938 sizeof(struct sadb_key)+auth_key_size); 939 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) / 940 sizeof(uint64_t); 941 key->sadb_key_exttype = SADB_EXT_KEY_AUTH; 942 key->sadb_key_bits = x->aalg->alg_key_len; 943 key->sadb_key_reserved = 0; 944 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8); 945 } 946 /* encrypt key */ 947 if (add_keys && encrypt_key_size) { 948 key = (struct sadb_key *) skb_put(skb, 949 sizeof(struct sadb_key)+encrypt_key_size); 950 key->sadb_key_len = (sizeof(struct sadb_key) + 951 encrypt_key_size) / sizeof(uint64_t); 952 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT; 953 key->sadb_key_bits = x->ealg->alg_key_len; 954 key->sadb_key_reserved = 0; 955 memcpy(key + 1, x->ealg->alg_key, 956 (x->ealg->alg_key_len+7)/8); 957 } 958 959 /* sa */ 960 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2)); 961 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t); 962 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 963 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) { 964 kfree_skb(skb); 965 return ERR_PTR(-EINVAL); 966 } 967 sa2->sadb_x_sa2_mode = mode; 968 sa2->sadb_x_sa2_reserved1 = 0; 969 sa2->sadb_x_sa2_reserved2 = 0; 970 sa2->sadb_x_sa2_sequence = 0; 971 sa2->sadb_x_sa2_reqid = x->props.reqid; 972 973 if (natt && natt->encap_type) { 974 struct sadb_x_nat_t_type *n_type; 975 struct sadb_x_nat_t_port *n_port; 976 977 /* type */ 978 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type)); 979 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t); 980 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 981 n_type->sadb_x_nat_t_type_type = natt->encap_type; 982 n_type->sadb_x_nat_t_type_reserved[0] = 0; 983 n_type->sadb_x_nat_t_type_reserved[1] = 0; 984 n_type->sadb_x_nat_t_type_reserved[2] = 0; 985 986 /* source port */ 987 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); 988 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); 989 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; 990 n_port->sadb_x_nat_t_port_port = natt->encap_sport; 991 n_port->sadb_x_nat_t_port_reserved = 0; 992 993 /* dest port */ 994 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); 995 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); 996 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; 997 n_port->sadb_x_nat_t_port_port = natt->encap_dport; 998 n_port->sadb_x_nat_t_port_reserved = 0; 999 } 1000 1001 /* security context */ 1002 if (xfrm_ctx) { 1003 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, 1004 sizeof(struct sadb_x_sec_ctx) + ctx_size); 1005 sec_ctx->sadb_x_sec_len = 1006 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); 1007 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; 1008 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; 1009 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; 1010 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; 1011 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, 1012 xfrm_ctx->ctx_len); 1013 } 1014 1015 return skb; 1016 } 1017 1018 1019 static inline struct sk_buff *pfkey_xfrm_state2msg(struct xfrm_state *x) 1020 { 1021 struct sk_buff *skb; 1022 1023 skb = __pfkey_xfrm_state2msg(x, 1, 3); 1024 1025 return skb; 1026 } 1027 1028 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x, 1029 int hsc) 1030 { 1031 return __pfkey_xfrm_state2msg(x, 0, hsc); 1032 } 1033 1034 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr, 1035 void **ext_hdrs) 1036 { 1037 struct xfrm_state *x; 1038 struct sadb_lifetime *lifetime; 1039 struct sadb_sa *sa; 1040 struct sadb_key *key; 1041 struct sadb_x_sec_ctx *sec_ctx; 1042 uint16_t proto; 1043 int err; 1044 1045 1046 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; 1047 if (!sa || 1048 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 1049 ext_hdrs[SADB_EXT_ADDRESS_DST-1])) 1050 return ERR_PTR(-EINVAL); 1051 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP && 1052 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]) 1053 return ERR_PTR(-EINVAL); 1054 if (hdr->sadb_msg_satype == SADB_SATYPE_AH && 1055 !ext_hdrs[SADB_EXT_KEY_AUTH-1]) 1056 return ERR_PTR(-EINVAL); 1057 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] != 1058 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) 1059 return ERR_PTR(-EINVAL); 1060 1061 proto = pfkey_satype2proto(hdr->sadb_msg_satype); 1062 if (proto == 0) 1063 return ERR_PTR(-EINVAL); 1064 1065 /* default error is no buffer space */ 1066 err = -ENOBUFS; 1067 1068 /* RFC2367: 1069 1070 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message. 1071 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not 1072 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state. 1073 Therefore, the sadb_sa_state field of all submitted SAs MUST be 1074 SADB_SASTATE_MATURE and the kernel MUST return an error if this is 1075 not true. 1076 1077 However, KAME setkey always uses SADB_SASTATE_LARVAL. 1078 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable. 1079 */ 1080 if (sa->sadb_sa_auth > SADB_AALG_MAX || 1081 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP && 1082 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) || 1083 sa->sadb_sa_encrypt > SADB_EALG_MAX) 1084 return ERR_PTR(-EINVAL); 1085 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; 1086 if (key != NULL && 1087 sa->sadb_sa_auth != SADB_X_AALG_NULL && 1088 ((key->sadb_key_bits+7) / 8 == 0 || 1089 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) 1090 return ERR_PTR(-EINVAL); 1091 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; 1092 if (key != NULL && 1093 sa->sadb_sa_encrypt != SADB_EALG_NULL && 1094 ((key->sadb_key_bits+7) / 8 == 0 || 1095 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) 1096 return ERR_PTR(-EINVAL); 1097 1098 x = xfrm_state_alloc(); 1099 if (x == NULL) 1100 return ERR_PTR(-ENOBUFS); 1101 1102 x->id.proto = proto; 1103 x->id.spi = sa->sadb_sa_spi; 1104 x->props.replay_window = sa->sadb_sa_replay; 1105 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN) 1106 x->props.flags |= XFRM_STATE_NOECN; 1107 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP) 1108 x->props.flags |= XFRM_STATE_DECAP_DSCP; 1109 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC) 1110 x->props.flags |= XFRM_STATE_NOPMTUDISC; 1111 1112 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1]; 1113 if (lifetime != NULL) { 1114 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); 1115 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); 1116 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; 1117 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; 1118 } 1119 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]; 1120 if (lifetime != NULL) { 1121 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); 1122 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); 1123 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; 1124 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; 1125 } 1126 1127 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; 1128 if (sec_ctx != NULL) { 1129 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); 1130 1131 if (!uctx) 1132 goto out; 1133 1134 err = security_xfrm_state_alloc(x, uctx); 1135 kfree(uctx); 1136 1137 if (err) 1138 goto out; 1139 } 1140 1141 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; 1142 if (sa->sadb_sa_auth) { 1143 int keysize = 0; 1144 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth); 1145 if (!a) { 1146 err = -ENOSYS; 1147 goto out; 1148 } 1149 if (key) 1150 keysize = (key->sadb_key_bits + 7) / 8; 1151 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL); 1152 if (!x->aalg) 1153 goto out; 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->props.aalgo = sa->sadb_sa_auth; 1161 /* x->algo.flags = sa->sadb_sa_flags; */ 1162 } 1163 if (sa->sadb_sa_encrypt) { 1164 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) { 1165 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt); 1166 if (!a) { 1167 err = -ENOSYS; 1168 goto out; 1169 } 1170 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL); 1171 if (!x->calg) 1172 goto out; 1173 strcpy(x->calg->alg_name, a->name); 1174 x->props.calgo = sa->sadb_sa_encrypt; 1175 } else { 1176 int keysize = 0; 1177 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt); 1178 if (!a) { 1179 err = -ENOSYS; 1180 goto out; 1181 } 1182 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; 1183 if (key) 1184 keysize = (key->sadb_key_bits + 7) / 8; 1185 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL); 1186 if (!x->ealg) 1187 goto out; 1188 strcpy(x->ealg->alg_name, a->name); 1189 x->ealg->alg_key_len = 0; 1190 if (key) { 1191 x->ealg->alg_key_len = key->sadb_key_bits; 1192 memcpy(x->ealg->alg_key, key+1, keysize); 1193 } 1194 x->props.ealgo = sa->sadb_sa_encrypt; 1195 } 1196 } 1197 /* x->algo.flags = sa->sadb_sa_flags; */ 1198 1199 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 1200 &x->props.saddr); 1201 if (!x->props.family) { 1202 err = -EAFNOSUPPORT; 1203 goto out; 1204 } 1205 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1], 1206 &x->id.daddr); 1207 1208 if (ext_hdrs[SADB_X_EXT_SA2-1]) { 1209 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1]; 1210 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); 1211 if (mode < 0) { 1212 err = -EINVAL; 1213 goto out; 1214 } 1215 x->props.mode = mode; 1216 x->props.reqid = sa2->sadb_x_sa2_reqid; 1217 } 1218 1219 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) { 1220 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]; 1221 1222 /* Nobody uses this, but we try. */ 1223 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr); 1224 x->sel.prefixlen_s = addr->sadb_address_prefixlen; 1225 } 1226 1227 if (!x->sel.family) 1228 x->sel.family = x->props.family; 1229 1230 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) { 1231 struct sadb_x_nat_t_type* n_type; 1232 struct xfrm_encap_tmpl *natt; 1233 1234 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL); 1235 if (!x->encap) 1236 goto out; 1237 1238 natt = x->encap; 1239 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]; 1240 natt->encap_type = n_type->sadb_x_nat_t_type_type; 1241 1242 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) { 1243 struct sadb_x_nat_t_port* n_port = 1244 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]; 1245 natt->encap_sport = n_port->sadb_x_nat_t_port_port; 1246 } 1247 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) { 1248 struct sadb_x_nat_t_port* n_port = 1249 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]; 1250 natt->encap_dport = n_port->sadb_x_nat_t_port_port; 1251 } 1252 } 1253 1254 err = xfrm_init_state(x); 1255 if (err) 1256 goto out; 1257 1258 x->km.seq = hdr->sadb_msg_seq; 1259 return x; 1260 1261 out: 1262 x->km.state = XFRM_STATE_DEAD; 1263 xfrm_state_put(x); 1264 return ERR_PTR(err); 1265 } 1266 1267 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1268 { 1269 return -EOPNOTSUPP; 1270 } 1271 1272 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1273 { 1274 struct sk_buff *resp_skb; 1275 struct sadb_x_sa2 *sa2; 1276 struct sadb_address *saddr, *daddr; 1277 struct sadb_msg *out_hdr; 1278 struct sadb_spirange *range; 1279 struct xfrm_state *x = NULL; 1280 int mode; 1281 int err; 1282 u32 min_spi, max_spi; 1283 u32 reqid; 1284 u8 proto; 1285 unsigned short family; 1286 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL; 1287 1288 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 1289 ext_hdrs[SADB_EXT_ADDRESS_DST-1])) 1290 return -EINVAL; 1291 1292 proto = pfkey_satype2proto(hdr->sadb_msg_satype); 1293 if (proto == 0) 1294 return -EINVAL; 1295 1296 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) { 1297 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); 1298 if (mode < 0) 1299 return -EINVAL; 1300 reqid = sa2->sadb_x_sa2_reqid; 1301 } else { 1302 mode = 0; 1303 reqid = 0; 1304 } 1305 1306 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; 1307 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; 1308 1309 family = ((struct sockaddr *)(saddr + 1))->sa_family; 1310 switch (family) { 1311 case AF_INET: 1312 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr; 1313 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr; 1314 break; 1315 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 1316 case AF_INET6: 1317 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr; 1318 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr; 1319 break; 1320 #endif 1321 } 1322 1323 if (hdr->sadb_msg_seq) { 1324 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq); 1325 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) { 1326 xfrm_state_put(x); 1327 x = NULL; 1328 } 1329 } 1330 1331 if (!x) 1332 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family); 1333 1334 if (x == NULL) 1335 return -ENOENT; 1336 1337 min_spi = 0x100; 1338 max_spi = 0x0fffffff; 1339 1340 range = ext_hdrs[SADB_EXT_SPIRANGE-1]; 1341 if (range) { 1342 min_spi = range->sadb_spirange_min; 1343 max_spi = range->sadb_spirange_max; 1344 } 1345 1346 err = xfrm_alloc_spi(x, min_spi, max_spi); 1347 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x); 1348 1349 if (IS_ERR(resp_skb)) { 1350 xfrm_state_put(x); 1351 return PTR_ERR(resp_skb); 1352 } 1353 1354 out_hdr = (struct sadb_msg *) resp_skb->data; 1355 out_hdr->sadb_msg_version = hdr->sadb_msg_version; 1356 out_hdr->sadb_msg_type = SADB_GETSPI; 1357 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); 1358 out_hdr->sadb_msg_errno = 0; 1359 out_hdr->sadb_msg_reserved = 0; 1360 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; 1361 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; 1362 1363 xfrm_state_put(x); 1364 1365 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk); 1366 1367 return 0; 1368 } 1369 1370 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1371 { 1372 struct xfrm_state *x; 1373 1374 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8) 1375 return -EOPNOTSUPP; 1376 1377 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0) 1378 return 0; 1379 1380 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq); 1381 if (x == NULL) 1382 return 0; 1383 1384 spin_lock_bh(&x->lock); 1385 if (x->km.state == XFRM_STATE_ACQ) { 1386 x->km.state = XFRM_STATE_ERROR; 1387 wake_up(&km_waitq); 1388 } 1389 spin_unlock_bh(&x->lock); 1390 xfrm_state_put(x); 1391 return 0; 1392 } 1393 1394 static inline int event2poltype(int event) 1395 { 1396 switch (event) { 1397 case XFRM_MSG_DELPOLICY: 1398 return SADB_X_SPDDELETE; 1399 case XFRM_MSG_NEWPOLICY: 1400 return SADB_X_SPDADD; 1401 case XFRM_MSG_UPDPOLICY: 1402 return SADB_X_SPDUPDATE; 1403 case XFRM_MSG_POLEXPIRE: 1404 // return SADB_X_SPDEXPIRE; 1405 default: 1406 printk("pfkey: Unknown policy event %d\n", event); 1407 break; 1408 } 1409 1410 return 0; 1411 } 1412 1413 static inline int event2keytype(int event) 1414 { 1415 switch (event) { 1416 case XFRM_MSG_DELSA: 1417 return SADB_DELETE; 1418 case XFRM_MSG_NEWSA: 1419 return SADB_ADD; 1420 case XFRM_MSG_UPDSA: 1421 return SADB_UPDATE; 1422 case XFRM_MSG_EXPIRE: 1423 return SADB_EXPIRE; 1424 default: 1425 printk("pfkey: Unknown SA event %d\n", event); 1426 break; 1427 } 1428 1429 return 0; 1430 } 1431 1432 /* ADD/UPD/DEL */ 1433 static int key_notify_sa(struct xfrm_state *x, struct km_event *c) 1434 { 1435 struct sk_buff *skb; 1436 struct sadb_msg *hdr; 1437 1438 skb = pfkey_xfrm_state2msg(x); 1439 1440 if (IS_ERR(skb)) 1441 return PTR_ERR(skb); 1442 1443 hdr = (struct sadb_msg *) skb->data; 1444 hdr->sadb_msg_version = PF_KEY_V2; 1445 hdr->sadb_msg_type = event2keytype(c->event); 1446 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); 1447 hdr->sadb_msg_errno = 0; 1448 hdr->sadb_msg_reserved = 0; 1449 hdr->sadb_msg_seq = c->seq; 1450 hdr->sadb_msg_pid = c->pid; 1451 1452 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL); 1453 1454 return 0; 1455 } 1456 1457 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1458 { 1459 struct xfrm_state *x; 1460 int err; 1461 struct km_event c; 1462 1463 x = pfkey_msg2xfrm_state(hdr, ext_hdrs); 1464 if (IS_ERR(x)) 1465 return PTR_ERR(x); 1466 1467 xfrm_state_hold(x); 1468 if (hdr->sadb_msg_type == SADB_ADD) 1469 err = xfrm_state_add(x); 1470 else 1471 err = xfrm_state_update(x); 1472 1473 xfrm_audit_state_add(x, err ? 0 : 1, 1474 audit_get_loginuid(current), 1475 audit_get_sessionid(current), 0); 1476 1477 if (err < 0) { 1478 x->km.state = XFRM_STATE_DEAD; 1479 __xfrm_state_put(x); 1480 goto out; 1481 } 1482 1483 if (hdr->sadb_msg_type == SADB_ADD) 1484 c.event = XFRM_MSG_NEWSA; 1485 else 1486 c.event = XFRM_MSG_UPDSA; 1487 c.seq = hdr->sadb_msg_seq; 1488 c.pid = hdr->sadb_msg_pid; 1489 km_state_notify(x, &c); 1490 out: 1491 xfrm_state_put(x); 1492 return err; 1493 } 1494 1495 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1496 { 1497 struct xfrm_state *x; 1498 struct km_event c; 1499 int err; 1500 1501 if (!ext_hdrs[SADB_EXT_SA-1] || 1502 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 1503 ext_hdrs[SADB_EXT_ADDRESS_DST-1])) 1504 return -EINVAL; 1505 1506 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs); 1507 if (x == NULL) 1508 return -ESRCH; 1509 1510 if ((err = security_xfrm_state_delete(x))) 1511 goto out; 1512 1513 if (xfrm_state_kern(x)) { 1514 err = -EPERM; 1515 goto out; 1516 } 1517 1518 err = xfrm_state_delete(x); 1519 1520 if (err < 0) 1521 goto out; 1522 1523 c.seq = hdr->sadb_msg_seq; 1524 c.pid = hdr->sadb_msg_pid; 1525 c.event = XFRM_MSG_DELSA; 1526 km_state_notify(x, &c); 1527 out: 1528 xfrm_audit_state_delete(x, err ? 0 : 1, 1529 audit_get_loginuid(current), 1530 audit_get_sessionid(current), 0); 1531 xfrm_state_put(x); 1532 1533 return err; 1534 } 1535 1536 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1537 { 1538 __u8 proto; 1539 struct sk_buff *out_skb; 1540 struct sadb_msg *out_hdr; 1541 struct xfrm_state *x; 1542 1543 if (!ext_hdrs[SADB_EXT_SA-1] || 1544 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 1545 ext_hdrs[SADB_EXT_ADDRESS_DST-1])) 1546 return -EINVAL; 1547 1548 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs); 1549 if (x == NULL) 1550 return -ESRCH; 1551 1552 out_skb = pfkey_xfrm_state2msg(x); 1553 proto = x->id.proto; 1554 xfrm_state_put(x); 1555 if (IS_ERR(out_skb)) 1556 return PTR_ERR(out_skb); 1557 1558 out_hdr = (struct sadb_msg *) out_skb->data; 1559 out_hdr->sadb_msg_version = hdr->sadb_msg_version; 1560 out_hdr->sadb_msg_type = SADB_GET; 1561 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); 1562 out_hdr->sadb_msg_errno = 0; 1563 out_hdr->sadb_msg_reserved = 0; 1564 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; 1565 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; 1566 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk); 1567 1568 return 0; 1569 } 1570 1571 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig, 1572 gfp_t allocation) 1573 { 1574 struct sk_buff *skb; 1575 struct sadb_msg *hdr; 1576 int len, auth_len, enc_len, i; 1577 1578 auth_len = xfrm_count_auth_supported(); 1579 if (auth_len) { 1580 auth_len *= sizeof(struct sadb_alg); 1581 auth_len += sizeof(struct sadb_supported); 1582 } 1583 1584 enc_len = xfrm_count_enc_supported(); 1585 if (enc_len) { 1586 enc_len *= sizeof(struct sadb_alg); 1587 enc_len += sizeof(struct sadb_supported); 1588 } 1589 1590 len = enc_len + auth_len + sizeof(struct sadb_msg); 1591 1592 skb = alloc_skb(len + 16, allocation); 1593 if (!skb) 1594 goto out_put_algs; 1595 1596 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr)); 1597 pfkey_hdr_dup(hdr, orig); 1598 hdr->sadb_msg_errno = 0; 1599 hdr->sadb_msg_len = len / sizeof(uint64_t); 1600 1601 if (auth_len) { 1602 struct sadb_supported *sp; 1603 struct sadb_alg *ap; 1604 1605 sp = (struct sadb_supported *) skb_put(skb, auth_len); 1606 ap = (struct sadb_alg *) (sp + 1); 1607 1608 sp->sadb_supported_len = auth_len / sizeof(uint64_t); 1609 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 1610 1611 for (i = 0; ; i++) { 1612 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); 1613 if (!aalg) 1614 break; 1615 if (aalg->available) 1616 *ap++ = aalg->desc; 1617 } 1618 } 1619 1620 if (enc_len) { 1621 struct sadb_supported *sp; 1622 struct sadb_alg *ap; 1623 1624 sp = (struct sadb_supported *) skb_put(skb, enc_len); 1625 ap = (struct sadb_alg *) (sp + 1); 1626 1627 sp->sadb_supported_len = enc_len / sizeof(uint64_t); 1628 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 1629 1630 for (i = 0; ; i++) { 1631 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); 1632 if (!ealg) 1633 break; 1634 if (ealg->available) 1635 *ap++ = ealg->desc; 1636 } 1637 } 1638 1639 out_put_algs: 1640 return skb; 1641 } 1642 1643 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1644 { 1645 struct pfkey_sock *pfk = pfkey_sk(sk); 1646 struct sk_buff *supp_skb; 1647 1648 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX) 1649 return -EINVAL; 1650 1651 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) { 1652 if (pfk->registered&(1<<hdr->sadb_msg_satype)) 1653 return -EEXIST; 1654 pfk->registered |= (1<<hdr->sadb_msg_satype); 1655 } 1656 1657 xfrm_probe_algs(); 1658 1659 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL); 1660 if (!supp_skb) { 1661 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) 1662 pfk->registered &= ~(1<<hdr->sadb_msg_satype); 1663 1664 return -ENOBUFS; 1665 } 1666 1667 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk); 1668 1669 return 0; 1670 } 1671 1672 static int key_notify_sa_flush(struct km_event *c) 1673 { 1674 struct sk_buff *skb; 1675 struct sadb_msg *hdr; 1676 1677 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); 1678 if (!skb) 1679 return -ENOBUFS; 1680 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); 1681 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto); 1682 hdr->sadb_msg_type = SADB_FLUSH; 1683 hdr->sadb_msg_seq = c->seq; 1684 hdr->sadb_msg_pid = c->pid; 1685 hdr->sadb_msg_version = PF_KEY_V2; 1686 hdr->sadb_msg_errno = (uint8_t) 0; 1687 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); 1688 1689 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL); 1690 1691 return 0; 1692 } 1693 1694 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1695 { 1696 unsigned proto; 1697 struct km_event c; 1698 struct xfrm_audit audit_info; 1699 int err; 1700 1701 proto = pfkey_satype2proto(hdr->sadb_msg_satype); 1702 if (proto == 0) 1703 return -EINVAL; 1704 1705 audit_info.loginuid = audit_get_loginuid(current); 1706 audit_info.sessionid = audit_get_sessionid(current); 1707 audit_info.secid = 0; 1708 err = xfrm_state_flush(proto, &audit_info); 1709 if (err) 1710 return err; 1711 c.data.proto = proto; 1712 c.seq = hdr->sadb_msg_seq; 1713 c.pid = hdr->sadb_msg_pid; 1714 c.event = XFRM_MSG_FLUSHSA; 1715 km_state_notify(NULL, &c); 1716 1717 return 0; 1718 } 1719 1720 static int dump_sa(struct xfrm_state *x, int count, void *ptr) 1721 { 1722 struct pfkey_sock *pfk = ptr; 1723 struct sk_buff *out_skb; 1724 struct sadb_msg *out_hdr; 1725 1726 if (!pfkey_can_dump(&pfk->sk)) 1727 return -ENOBUFS; 1728 1729 out_skb = pfkey_xfrm_state2msg(x); 1730 if (IS_ERR(out_skb)) 1731 return PTR_ERR(out_skb); 1732 1733 out_hdr = (struct sadb_msg *) out_skb->data; 1734 out_hdr->sadb_msg_version = pfk->dump.msg_version; 1735 out_hdr->sadb_msg_type = SADB_DUMP; 1736 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); 1737 out_hdr->sadb_msg_errno = 0; 1738 out_hdr->sadb_msg_reserved = 0; 1739 out_hdr->sadb_msg_seq = count; 1740 out_hdr->sadb_msg_pid = pfk->dump.msg_pid; 1741 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, &pfk->sk); 1742 return 0; 1743 } 1744 1745 static int pfkey_dump_sa(struct pfkey_sock *pfk) 1746 { 1747 return xfrm_state_walk(&pfk->dump.u.state, dump_sa, (void *) pfk); 1748 } 1749 1750 static void pfkey_dump_sa_done(struct pfkey_sock *pfk) 1751 { 1752 xfrm_state_walk_done(&pfk->dump.u.state); 1753 } 1754 1755 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1756 { 1757 u8 proto; 1758 struct pfkey_sock *pfk = pfkey_sk(sk); 1759 1760 if (pfk->dump.dump != NULL) 1761 return -EBUSY; 1762 1763 proto = pfkey_satype2proto(hdr->sadb_msg_satype); 1764 if (proto == 0) 1765 return -EINVAL; 1766 1767 pfk->dump.msg_version = hdr->sadb_msg_version; 1768 pfk->dump.msg_pid = hdr->sadb_msg_pid; 1769 pfk->dump.dump = pfkey_dump_sa; 1770 pfk->dump.done = pfkey_dump_sa_done; 1771 xfrm_state_walk_init(&pfk->dump.u.state, proto); 1772 1773 return pfkey_do_dump(pfk); 1774 } 1775 1776 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 1777 { 1778 struct pfkey_sock *pfk = pfkey_sk(sk); 1779 int satype = hdr->sadb_msg_satype; 1780 1781 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) { 1782 /* XXX we mangle packet... */ 1783 hdr->sadb_msg_errno = 0; 1784 if (satype != 0 && satype != 1) 1785 return -EINVAL; 1786 pfk->promisc = satype; 1787 } 1788 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL); 1789 return 0; 1790 } 1791 1792 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr) 1793 { 1794 int i; 1795 u32 reqid = *(u32*)ptr; 1796 1797 for (i=0; i<xp->xfrm_nr; i++) { 1798 if (xp->xfrm_vec[i].reqid == reqid) 1799 return -EEXIST; 1800 } 1801 return 0; 1802 } 1803 1804 static u32 gen_reqid(void) 1805 { 1806 struct xfrm_policy_walk walk; 1807 u32 start; 1808 int rc; 1809 static u32 reqid = IPSEC_MANUAL_REQID_MAX; 1810 1811 start = reqid; 1812 do { 1813 ++reqid; 1814 if (reqid == 0) 1815 reqid = IPSEC_MANUAL_REQID_MAX+1; 1816 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN); 1817 rc = xfrm_policy_walk(&walk, check_reqid, (void*)&reqid); 1818 xfrm_policy_walk_done(&walk); 1819 if (rc != -EEXIST) 1820 return reqid; 1821 } while (reqid != start); 1822 return 0; 1823 } 1824 1825 static int 1826 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq) 1827 { 1828 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr; 1829 int mode; 1830 1831 if (xp->xfrm_nr >= XFRM_MAX_DEPTH) 1832 return -ELOOP; 1833 1834 if (rq->sadb_x_ipsecrequest_mode == 0) 1835 return -EINVAL; 1836 1837 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */ 1838 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0) 1839 return -EINVAL; 1840 t->mode = mode; 1841 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) 1842 t->optional = 1; 1843 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) { 1844 t->reqid = rq->sadb_x_ipsecrequest_reqid; 1845 if (t->reqid > IPSEC_MANUAL_REQID_MAX) 1846 t->reqid = 0; 1847 if (!t->reqid && !(t->reqid = gen_reqid())) 1848 return -ENOBUFS; 1849 } 1850 1851 /* addresses present only in tunnel mode */ 1852 if (t->mode == XFRM_MODE_TUNNEL) { 1853 u8 *sa = (u8 *) (rq + 1); 1854 int family, socklen; 1855 1856 family = pfkey_sockaddr_extract((struct sockaddr *)sa, 1857 &t->saddr); 1858 if (!family) 1859 return -EINVAL; 1860 1861 socklen = pfkey_sockaddr_len(family); 1862 if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen), 1863 &t->id.daddr) != family) 1864 return -EINVAL; 1865 t->encap_family = family; 1866 } else 1867 t->encap_family = xp->family; 1868 1869 /* No way to set this via kame pfkey */ 1870 t->allalgs = 1; 1871 xp->xfrm_nr++; 1872 return 0; 1873 } 1874 1875 static int 1876 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol) 1877 { 1878 int err; 1879 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy); 1880 struct sadb_x_ipsecrequest *rq = (void*)(pol+1); 1881 1882 while (len >= sizeof(struct sadb_x_ipsecrequest)) { 1883 if ((err = parse_ipsecrequest(xp, rq)) < 0) 1884 return err; 1885 len -= rq->sadb_x_ipsecrequest_len; 1886 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len); 1887 } 1888 return 0; 1889 } 1890 1891 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp) 1892 { 1893 struct xfrm_sec_ctx *xfrm_ctx = xp->security; 1894 1895 if (xfrm_ctx) { 1896 int len = sizeof(struct sadb_x_sec_ctx); 1897 len += xfrm_ctx->ctx_len; 1898 return PFKEY_ALIGN8(len); 1899 } 1900 return 0; 1901 } 1902 1903 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp) 1904 { 1905 struct xfrm_tmpl *t; 1906 int sockaddr_size = pfkey_sockaddr_size(xp->family); 1907 int socklen = 0; 1908 int i; 1909 1910 for (i=0; i<xp->xfrm_nr; i++) { 1911 t = xp->xfrm_vec + i; 1912 socklen += pfkey_sockaddr_len(t->encap_family); 1913 } 1914 1915 return sizeof(struct sadb_msg) + 1916 (sizeof(struct sadb_lifetime) * 3) + 1917 (sizeof(struct sadb_address) * 2) + 1918 (sockaddr_size * 2) + 1919 sizeof(struct sadb_x_policy) + 1920 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) + 1921 (socklen * 2) + 1922 pfkey_xfrm_policy2sec_ctx_size(xp); 1923 } 1924 1925 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp) 1926 { 1927 struct sk_buff *skb; 1928 int size; 1929 1930 size = pfkey_xfrm_policy2msg_size(xp); 1931 1932 skb = alloc_skb(size + 16, GFP_ATOMIC); 1933 if (skb == NULL) 1934 return ERR_PTR(-ENOBUFS); 1935 1936 return skb; 1937 } 1938 1939 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir) 1940 { 1941 struct sadb_msg *hdr; 1942 struct sadb_address *addr; 1943 struct sadb_lifetime *lifetime; 1944 struct sadb_x_policy *pol; 1945 struct sadb_x_sec_ctx *sec_ctx; 1946 struct xfrm_sec_ctx *xfrm_ctx; 1947 int i; 1948 int size; 1949 int sockaddr_size = pfkey_sockaddr_size(xp->family); 1950 int socklen = pfkey_sockaddr_len(xp->family); 1951 1952 size = pfkey_xfrm_policy2msg_size(xp); 1953 1954 /* call should fill header later */ 1955 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); 1956 memset(hdr, 0, size); /* XXX do we need this ? */ 1957 1958 /* src address */ 1959 addr = (struct sadb_address*) skb_put(skb, 1960 sizeof(struct sadb_address)+sockaddr_size); 1961 addr->sadb_address_len = 1962 (sizeof(struct sadb_address)+sockaddr_size)/ 1963 sizeof(uint64_t); 1964 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; 1965 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); 1966 addr->sadb_address_prefixlen = xp->selector.prefixlen_s; 1967 addr->sadb_address_reserved = 0; 1968 if (!pfkey_sockaddr_fill(&xp->selector.saddr, 1969 xp->selector.sport, 1970 (struct sockaddr *) (addr + 1), 1971 xp->family)) 1972 BUG(); 1973 1974 /* dst address */ 1975 addr = (struct sadb_address*) skb_put(skb, 1976 sizeof(struct sadb_address)+sockaddr_size); 1977 addr->sadb_address_len = 1978 (sizeof(struct sadb_address)+sockaddr_size)/ 1979 sizeof(uint64_t); 1980 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; 1981 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); 1982 addr->sadb_address_prefixlen = xp->selector.prefixlen_d; 1983 addr->sadb_address_reserved = 0; 1984 1985 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport, 1986 (struct sockaddr *) (addr + 1), 1987 xp->family); 1988 1989 /* hard time */ 1990 lifetime = (struct sadb_lifetime *) skb_put(skb, 1991 sizeof(struct sadb_lifetime)); 1992 lifetime->sadb_lifetime_len = 1993 sizeof(struct sadb_lifetime)/sizeof(uint64_t); 1994 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 1995 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit); 1996 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit); 1997 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds; 1998 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds; 1999 /* soft time */ 2000 lifetime = (struct sadb_lifetime *) skb_put(skb, 2001 sizeof(struct sadb_lifetime)); 2002 lifetime->sadb_lifetime_len = 2003 sizeof(struct sadb_lifetime)/sizeof(uint64_t); 2004 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; 2005 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit); 2006 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit); 2007 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds; 2008 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds; 2009 /* current time */ 2010 lifetime = (struct sadb_lifetime *) skb_put(skb, 2011 sizeof(struct sadb_lifetime)); 2012 lifetime->sadb_lifetime_len = 2013 sizeof(struct sadb_lifetime)/sizeof(uint64_t); 2014 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2015 lifetime->sadb_lifetime_allocations = xp->curlft.packets; 2016 lifetime->sadb_lifetime_bytes = xp->curlft.bytes; 2017 lifetime->sadb_lifetime_addtime = xp->curlft.add_time; 2018 lifetime->sadb_lifetime_usetime = xp->curlft.use_time; 2019 2020 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); 2021 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); 2022 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 2023 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD; 2024 if (xp->action == XFRM_POLICY_ALLOW) { 2025 if (xp->xfrm_nr) 2026 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; 2027 else 2028 pol->sadb_x_policy_type = IPSEC_POLICY_NONE; 2029 } 2030 pol->sadb_x_policy_dir = dir+1; 2031 pol->sadb_x_policy_id = xp->index; 2032 pol->sadb_x_policy_priority = xp->priority; 2033 2034 for (i=0; i<xp->xfrm_nr; i++) { 2035 struct sadb_x_ipsecrequest *rq; 2036 struct xfrm_tmpl *t = xp->xfrm_vec + i; 2037 int req_size; 2038 int mode; 2039 2040 req_size = sizeof(struct sadb_x_ipsecrequest); 2041 if (t->mode == XFRM_MODE_TUNNEL) { 2042 socklen = pfkey_sockaddr_len(t->encap_family); 2043 req_size += socklen * 2; 2044 } else { 2045 size -= 2*socklen; 2046 socklen = 0; 2047 } 2048 rq = (void*)skb_put(skb, req_size); 2049 pol->sadb_x_policy_len += req_size/8; 2050 memset(rq, 0, sizeof(*rq)); 2051 rq->sadb_x_ipsecrequest_len = req_size; 2052 rq->sadb_x_ipsecrequest_proto = t->id.proto; 2053 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0) 2054 return -EINVAL; 2055 rq->sadb_x_ipsecrequest_mode = mode; 2056 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE; 2057 if (t->reqid) 2058 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE; 2059 if (t->optional) 2060 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE; 2061 rq->sadb_x_ipsecrequest_reqid = t->reqid; 2062 2063 if (t->mode == XFRM_MODE_TUNNEL) { 2064 u8 *sa = (void *)(rq + 1); 2065 pfkey_sockaddr_fill(&t->saddr, 0, 2066 (struct sockaddr *)sa, 2067 t->encap_family); 2068 pfkey_sockaddr_fill(&t->id.daddr, 0, 2069 (struct sockaddr *) (sa + socklen), 2070 t->encap_family); 2071 } 2072 } 2073 2074 /* security context */ 2075 if ((xfrm_ctx = xp->security)) { 2076 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp); 2077 2078 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size); 2079 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t); 2080 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; 2081 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; 2082 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; 2083 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; 2084 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, 2085 xfrm_ctx->ctx_len); 2086 } 2087 2088 hdr->sadb_msg_len = size / sizeof(uint64_t); 2089 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt); 2090 2091 return 0; 2092 } 2093 2094 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) 2095 { 2096 struct sk_buff *out_skb; 2097 struct sadb_msg *out_hdr; 2098 int err; 2099 2100 out_skb = pfkey_xfrm_policy2msg_prep(xp); 2101 if (IS_ERR(out_skb)) { 2102 err = PTR_ERR(out_skb); 2103 goto out; 2104 } 2105 err = pfkey_xfrm_policy2msg(out_skb, xp, dir); 2106 if (err < 0) 2107 return err; 2108 2109 out_hdr = (struct sadb_msg *) out_skb->data; 2110 out_hdr->sadb_msg_version = PF_KEY_V2; 2111 2112 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY) 2113 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2; 2114 else 2115 out_hdr->sadb_msg_type = event2poltype(c->event); 2116 out_hdr->sadb_msg_errno = 0; 2117 out_hdr->sadb_msg_seq = c->seq; 2118 out_hdr->sadb_msg_pid = c->pid; 2119 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL); 2120 out: 2121 return 0; 2122 2123 } 2124 2125 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 2126 { 2127 int err = 0; 2128 struct sadb_lifetime *lifetime; 2129 struct sadb_address *sa; 2130 struct sadb_x_policy *pol; 2131 struct xfrm_policy *xp; 2132 struct km_event c; 2133 struct sadb_x_sec_ctx *sec_ctx; 2134 2135 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 2136 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || 2137 !ext_hdrs[SADB_X_EXT_POLICY-1]) 2138 return -EINVAL; 2139 2140 pol = ext_hdrs[SADB_X_EXT_POLICY-1]; 2141 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC) 2142 return -EINVAL; 2143 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) 2144 return -EINVAL; 2145 2146 xp = xfrm_policy_alloc(GFP_KERNEL); 2147 if (xp == NULL) 2148 return -ENOBUFS; 2149 2150 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? 2151 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); 2152 xp->priority = pol->sadb_x_policy_priority; 2153 2154 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 2155 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr); 2156 if (!xp->family) { 2157 err = -EINVAL; 2158 goto out; 2159 } 2160 xp->selector.family = xp->family; 2161 xp->selector.prefixlen_s = sa->sadb_address_prefixlen; 2162 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); 2163 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port; 2164 if (xp->selector.sport) 2165 xp->selector.sport_mask = htons(0xffff); 2166 2167 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], 2168 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr); 2169 xp->selector.prefixlen_d = sa->sadb_address_prefixlen; 2170 2171 /* Amusing, we set this twice. KAME apps appear to set same value 2172 * in both addresses. 2173 */ 2174 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); 2175 2176 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port; 2177 if (xp->selector.dport) 2178 xp->selector.dport_mask = htons(0xffff); 2179 2180 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; 2181 if (sec_ctx != NULL) { 2182 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); 2183 2184 if (!uctx) { 2185 err = -ENOBUFS; 2186 goto out; 2187 } 2188 2189 err = security_xfrm_policy_alloc(&xp->security, uctx); 2190 kfree(uctx); 2191 2192 if (err) 2193 goto out; 2194 } 2195 2196 xp->lft.soft_byte_limit = XFRM_INF; 2197 xp->lft.hard_byte_limit = XFRM_INF; 2198 xp->lft.soft_packet_limit = XFRM_INF; 2199 xp->lft.hard_packet_limit = XFRM_INF; 2200 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) { 2201 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); 2202 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); 2203 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; 2204 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; 2205 } 2206 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) { 2207 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); 2208 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); 2209 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; 2210 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; 2211 } 2212 xp->xfrm_nr = 0; 2213 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && 2214 (err = parse_ipsecrequests(xp, pol)) < 0) 2215 goto out; 2216 2217 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp, 2218 hdr->sadb_msg_type != SADB_X_SPDUPDATE); 2219 2220 xfrm_audit_policy_add(xp, err ? 0 : 1, 2221 audit_get_loginuid(current), 2222 audit_get_sessionid(current), 0); 2223 2224 if (err) 2225 goto out; 2226 2227 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE) 2228 c.event = XFRM_MSG_UPDPOLICY; 2229 else 2230 c.event = XFRM_MSG_NEWPOLICY; 2231 2232 c.seq = hdr->sadb_msg_seq; 2233 c.pid = hdr->sadb_msg_pid; 2234 2235 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); 2236 xfrm_pol_put(xp); 2237 return 0; 2238 2239 out: 2240 xp->dead = 1; 2241 xfrm_policy_destroy(xp); 2242 return err; 2243 } 2244 2245 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 2246 { 2247 int err; 2248 struct sadb_address *sa; 2249 struct sadb_x_policy *pol; 2250 struct xfrm_policy *xp; 2251 struct xfrm_selector sel; 2252 struct km_event c; 2253 struct sadb_x_sec_ctx *sec_ctx; 2254 struct xfrm_sec_ctx *pol_ctx = NULL; 2255 2256 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 2257 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || 2258 !ext_hdrs[SADB_X_EXT_POLICY-1]) 2259 return -EINVAL; 2260 2261 pol = ext_hdrs[SADB_X_EXT_POLICY-1]; 2262 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) 2263 return -EINVAL; 2264 2265 memset(&sel, 0, sizeof(sel)); 2266 2267 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 2268 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); 2269 sel.prefixlen_s = sa->sadb_address_prefixlen; 2270 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); 2271 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port; 2272 if (sel.sport) 2273 sel.sport_mask = htons(0xffff); 2274 2275 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], 2276 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); 2277 sel.prefixlen_d = sa->sadb_address_prefixlen; 2278 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); 2279 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port; 2280 if (sel.dport) 2281 sel.dport_mask = htons(0xffff); 2282 2283 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; 2284 if (sec_ctx != NULL) { 2285 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); 2286 2287 if (!uctx) 2288 return -ENOMEM; 2289 2290 err = security_xfrm_policy_alloc(&pol_ctx, uctx); 2291 kfree(uctx); 2292 if (err) 2293 return err; 2294 } 2295 2296 xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, 2297 pol->sadb_x_policy_dir - 1, &sel, pol_ctx, 2298 1, &err); 2299 security_xfrm_policy_free(pol_ctx); 2300 if (xp == NULL) 2301 return -ENOENT; 2302 2303 xfrm_audit_policy_delete(xp, err ? 0 : 1, 2304 audit_get_loginuid(current), 2305 audit_get_sessionid(current), 0); 2306 2307 if (err) 2308 goto out; 2309 2310 c.seq = hdr->sadb_msg_seq; 2311 c.pid = hdr->sadb_msg_pid; 2312 c.event = XFRM_MSG_DELPOLICY; 2313 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); 2314 2315 out: 2316 xfrm_pol_put(xp); 2317 return err; 2318 } 2319 2320 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir) 2321 { 2322 int err; 2323 struct sk_buff *out_skb; 2324 struct sadb_msg *out_hdr; 2325 err = 0; 2326 2327 out_skb = pfkey_xfrm_policy2msg_prep(xp); 2328 if (IS_ERR(out_skb)) { 2329 err = PTR_ERR(out_skb); 2330 goto out; 2331 } 2332 err = pfkey_xfrm_policy2msg(out_skb, xp, dir); 2333 if (err < 0) 2334 goto out; 2335 2336 out_hdr = (struct sadb_msg *) out_skb->data; 2337 out_hdr->sadb_msg_version = hdr->sadb_msg_version; 2338 out_hdr->sadb_msg_type = hdr->sadb_msg_type; 2339 out_hdr->sadb_msg_satype = 0; 2340 out_hdr->sadb_msg_errno = 0; 2341 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; 2342 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; 2343 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk); 2344 err = 0; 2345 2346 out: 2347 return err; 2348 } 2349 2350 #ifdef CONFIG_NET_KEY_MIGRATE 2351 static int pfkey_sockaddr_pair_size(sa_family_t family) 2352 { 2353 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2); 2354 } 2355 2356 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq, 2357 xfrm_address_t *saddr, xfrm_address_t *daddr, 2358 u16 *family) 2359 { 2360 u8 *sa = (u8 *) (rq + 1); 2361 int af, socklen; 2362 2363 if (rq->sadb_x_ipsecrequest_len < 2364 pfkey_sockaddr_pair_size(((struct sockaddr *)sa)->sa_family)) 2365 return -EINVAL; 2366 2367 af = pfkey_sockaddr_extract((struct sockaddr *) sa, 2368 saddr); 2369 if (!af) 2370 return -EINVAL; 2371 2372 socklen = pfkey_sockaddr_len(af); 2373 if (pfkey_sockaddr_extract((struct sockaddr *) (sa + socklen), 2374 daddr) != af) 2375 return -EINVAL; 2376 2377 *family = af; 2378 return 0; 2379 } 2380 2381 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len, 2382 struct xfrm_migrate *m) 2383 { 2384 int err; 2385 struct sadb_x_ipsecrequest *rq2; 2386 int mode; 2387 2388 if (len <= sizeof(struct sadb_x_ipsecrequest) || 2389 len < rq1->sadb_x_ipsecrequest_len) 2390 return -EINVAL; 2391 2392 /* old endoints */ 2393 err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr, 2394 &m->old_family); 2395 if (err) 2396 return err; 2397 2398 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len); 2399 len -= rq1->sadb_x_ipsecrequest_len; 2400 2401 if (len <= sizeof(struct sadb_x_ipsecrequest) || 2402 len < rq2->sadb_x_ipsecrequest_len) 2403 return -EINVAL; 2404 2405 /* new endpoints */ 2406 err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr, 2407 &m->new_family); 2408 if (err) 2409 return err; 2410 2411 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto || 2412 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode || 2413 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid) 2414 return -EINVAL; 2415 2416 m->proto = rq1->sadb_x_ipsecrequest_proto; 2417 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0) 2418 return -EINVAL; 2419 m->mode = mode; 2420 m->reqid = rq1->sadb_x_ipsecrequest_reqid; 2421 2422 return ((int)(rq1->sadb_x_ipsecrequest_len + 2423 rq2->sadb_x_ipsecrequest_len)); 2424 } 2425 2426 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, 2427 struct sadb_msg *hdr, void **ext_hdrs) 2428 { 2429 int i, len, ret, err = -EINVAL; 2430 u8 dir; 2431 struct sadb_address *sa; 2432 struct sadb_x_policy *pol; 2433 struct sadb_x_ipsecrequest *rq; 2434 struct xfrm_selector sel; 2435 struct xfrm_migrate m[XFRM_MAX_DEPTH]; 2436 2437 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1], 2438 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) || 2439 !ext_hdrs[SADB_X_EXT_POLICY - 1]) { 2440 err = -EINVAL; 2441 goto out; 2442 } 2443 2444 pol = ext_hdrs[SADB_X_EXT_POLICY - 1]; 2445 if (!pol) { 2446 err = -EINVAL; 2447 goto out; 2448 } 2449 2450 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) { 2451 err = -EINVAL; 2452 goto out; 2453 } 2454 2455 dir = pol->sadb_x_policy_dir - 1; 2456 memset(&sel, 0, sizeof(sel)); 2457 2458 /* set source address info of selector */ 2459 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1]; 2460 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); 2461 sel.prefixlen_s = sa->sadb_address_prefixlen; 2462 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); 2463 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port; 2464 if (sel.sport) 2465 sel.sport_mask = htons(0xffff); 2466 2467 /* set destination address info of selector */ 2468 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1], 2469 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); 2470 sel.prefixlen_d = sa->sadb_address_prefixlen; 2471 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); 2472 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port; 2473 if (sel.dport) 2474 sel.dport_mask = htons(0xffff); 2475 2476 rq = (struct sadb_x_ipsecrequest *)(pol + 1); 2477 2478 /* extract ipsecrequests */ 2479 i = 0; 2480 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy); 2481 2482 while (len > 0 && i < XFRM_MAX_DEPTH) { 2483 ret = ipsecrequests_to_migrate(rq, len, &m[i]); 2484 if (ret < 0) { 2485 err = ret; 2486 goto out; 2487 } else { 2488 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret); 2489 len -= ret; 2490 i++; 2491 } 2492 } 2493 2494 if (!i || len > 0) { 2495 err = -EINVAL; 2496 goto out; 2497 } 2498 2499 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i); 2500 2501 out: 2502 return err; 2503 } 2504 #else 2505 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, 2506 struct sadb_msg *hdr, void **ext_hdrs) 2507 { 2508 return -ENOPROTOOPT; 2509 } 2510 #endif 2511 2512 2513 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 2514 { 2515 unsigned int dir; 2516 int err = 0, delete; 2517 struct sadb_x_policy *pol; 2518 struct xfrm_policy *xp; 2519 struct km_event c; 2520 2521 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL) 2522 return -EINVAL; 2523 2524 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id); 2525 if (dir >= XFRM_POLICY_MAX) 2526 return -EINVAL; 2527 2528 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2); 2529 xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id, 2530 delete, &err); 2531 if (xp == NULL) 2532 return -ENOENT; 2533 2534 if (delete) { 2535 xfrm_audit_policy_delete(xp, err ? 0 : 1, 2536 audit_get_loginuid(current), 2537 audit_get_sessionid(current), 0); 2538 2539 if (err) 2540 goto out; 2541 c.seq = hdr->sadb_msg_seq; 2542 c.pid = hdr->sadb_msg_pid; 2543 c.data.byid = 1; 2544 c.event = XFRM_MSG_DELPOLICY; 2545 km_policy_notify(xp, dir, &c); 2546 } else { 2547 err = key_pol_get_resp(sk, xp, hdr, dir); 2548 } 2549 2550 out: 2551 xfrm_pol_put(xp); 2552 return err; 2553 } 2554 2555 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr) 2556 { 2557 struct pfkey_sock *pfk = ptr; 2558 struct sk_buff *out_skb; 2559 struct sadb_msg *out_hdr; 2560 int err; 2561 2562 if (!pfkey_can_dump(&pfk->sk)) 2563 return -ENOBUFS; 2564 2565 out_skb = pfkey_xfrm_policy2msg_prep(xp); 2566 if (IS_ERR(out_skb)) 2567 return PTR_ERR(out_skb); 2568 2569 err = pfkey_xfrm_policy2msg(out_skb, xp, dir); 2570 if (err < 0) 2571 return err; 2572 2573 out_hdr = (struct sadb_msg *) out_skb->data; 2574 out_hdr->sadb_msg_version = pfk->dump.msg_version; 2575 out_hdr->sadb_msg_type = SADB_X_SPDDUMP; 2576 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; 2577 out_hdr->sadb_msg_errno = 0; 2578 out_hdr->sadb_msg_seq = count; 2579 out_hdr->sadb_msg_pid = pfk->dump.msg_pid; 2580 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, &pfk->sk); 2581 return 0; 2582 } 2583 2584 static int pfkey_dump_sp(struct pfkey_sock *pfk) 2585 { 2586 return xfrm_policy_walk(&pfk->dump.u.policy, dump_sp, (void *) pfk); 2587 } 2588 2589 static void pfkey_dump_sp_done(struct pfkey_sock *pfk) 2590 { 2591 xfrm_policy_walk_done(&pfk->dump.u.policy); 2592 } 2593 2594 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 2595 { 2596 struct pfkey_sock *pfk = pfkey_sk(sk); 2597 2598 if (pfk->dump.dump != NULL) 2599 return -EBUSY; 2600 2601 pfk->dump.msg_version = hdr->sadb_msg_version; 2602 pfk->dump.msg_pid = hdr->sadb_msg_pid; 2603 pfk->dump.dump = pfkey_dump_sp; 2604 pfk->dump.done = pfkey_dump_sp_done; 2605 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN); 2606 2607 return pfkey_do_dump(pfk); 2608 } 2609 2610 static int key_notify_policy_flush(struct km_event *c) 2611 { 2612 struct sk_buff *skb_out; 2613 struct sadb_msg *hdr; 2614 2615 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); 2616 if (!skb_out) 2617 return -ENOBUFS; 2618 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg)); 2619 hdr->sadb_msg_type = SADB_X_SPDFLUSH; 2620 hdr->sadb_msg_seq = c->seq; 2621 hdr->sadb_msg_pid = c->pid; 2622 hdr->sadb_msg_version = PF_KEY_V2; 2623 hdr->sadb_msg_errno = (uint8_t) 0; 2624 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); 2625 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL); 2626 return 0; 2627 2628 } 2629 2630 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) 2631 { 2632 struct km_event c; 2633 struct xfrm_audit audit_info; 2634 int err; 2635 2636 audit_info.loginuid = audit_get_loginuid(current); 2637 audit_info.sessionid = audit_get_sessionid(current); 2638 audit_info.secid = 0; 2639 err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info); 2640 if (err) 2641 return err; 2642 c.data.type = XFRM_POLICY_TYPE_MAIN; 2643 c.event = XFRM_MSG_FLUSHPOLICY; 2644 c.pid = hdr->sadb_msg_pid; 2645 c.seq = hdr->sadb_msg_seq; 2646 km_policy_notify(NULL, 0, &c); 2647 2648 return 0; 2649 } 2650 2651 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb, 2652 struct sadb_msg *hdr, void **ext_hdrs); 2653 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = { 2654 [SADB_RESERVED] = pfkey_reserved, 2655 [SADB_GETSPI] = pfkey_getspi, 2656 [SADB_UPDATE] = pfkey_add, 2657 [SADB_ADD] = pfkey_add, 2658 [SADB_DELETE] = pfkey_delete, 2659 [SADB_GET] = pfkey_get, 2660 [SADB_ACQUIRE] = pfkey_acquire, 2661 [SADB_REGISTER] = pfkey_register, 2662 [SADB_EXPIRE] = NULL, 2663 [SADB_FLUSH] = pfkey_flush, 2664 [SADB_DUMP] = pfkey_dump, 2665 [SADB_X_PROMISC] = pfkey_promisc, 2666 [SADB_X_PCHANGE] = NULL, 2667 [SADB_X_SPDUPDATE] = pfkey_spdadd, 2668 [SADB_X_SPDADD] = pfkey_spdadd, 2669 [SADB_X_SPDDELETE] = pfkey_spddelete, 2670 [SADB_X_SPDGET] = pfkey_spdget, 2671 [SADB_X_SPDACQUIRE] = NULL, 2672 [SADB_X_SPDDUMP] = pfkey_spddump, 2673 [SADB_X_SPDFLUSH] = pfkey_spdflush, 2674 [SADB_X_SPDSETIDX] = pfkey_spdadd, 2675 [SADB_X_SPDDELETE2] = pfkey_spdget, 2676 [SADB_X_MIGRATE] = pfkey_migrate, 2677 }; 2678 2679 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr) 2680 { 2681 void *ext_hdrs[SADB_EXT_MAX]; 2682 int err; 2683 2684 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, 2685 BROADCAST_PROMISC_ONLY, NULL); 2686 2687 memset(ext_hdrs, 0, sizeof(ext_hdrs)); 2688 err = parse_exthdrs(skb, hdr, ext_hdrs); 2689 if (!err) { 2690 err = -EOPNOTSUPP; 2691 if (pfkey_funcs[hdr->sadb_msg_type]) 2692 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs); 2693 } 2694 return err; 2695 } 2696 2697 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp) 2698 { 2699 struct sadb_msg *hdr = NULL; 2700 2701 if (skb->len < sizeof(*hdr)) { 2702 *errp = -EMSGSIZE; 2703 } else { 2704 hdr = (struct sadb_msg *) skb->data; 2705 if (hdr->sadb_msg_version != PF_KEY_V2 || 2706 hdr->sadb_msg_reserved != 0 || 2707 (hdr->sadb_msg_type <= SADB_RESERVED || 2708 hdr->sadb_msg_type > SADB_MAX)) { 2709 hdr = NULL; 2710 *errp = -EINVAL; 2711 } else if (hdr->sadb_msg_len != (skb->len / 2712 sizeof(uint64_t)) || 2713 hdr->sadb_msg_len < (sizeof(struct sadb_msg) / 2714 sizeof(uint64_t))) { 2715 hdr = NULL; 2716 *errp = -EMSGSIZE; 2717 } else { 2718 *errp = 0; 2719 } 2720 } 2721 return hdr; 2722 } 2723 2724 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) 2725 { 2726 unsigned int id = d->desc.sadb_alg_id; 2727 2728 if (id >= sizeof(t->aalgos) * 8) 2729 return 0; 2730 2731 return (t->aalgos >> id) & 1; 2732 } 2733 2734 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) 2735 { 2736 unsigned int id = d->desc.sadb_alg_id; 2737 2738 if (id >= sizeof(t->ealgos) * 8) 2739 return 0; 2740 2741 return (t->ealgos >> id) & 1; 2742 } 2743 2744 static int count_ah_combs(struct xfrm_tmpl *t) 2745 { 2746 int i, sz = 0; 2747 2748 for (i = 0; ; i++) { 2749 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); 2750 if (!aalg) 2751 break; 2752 if (aalg_tmpl_set(t, aalg) && aalg->available) 2753 sz += sizeof(struct sadb_comb); 2754 } 2755 return sz + sizeof(struct sadb_prop); 2756 } 2757 2758 static int count_esp_combs(struct xfrm_tmpl *t) 2759 { 2760 int i, k, sz = 0; 2761 2762 for (i = 0; ; i++) { 2763 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); 2764 if (!ealg) 2765 break; 2766 2767 if (!(ealg_tmpl_set(t, ealg) && ealg->available)) 2768 continue; 2769 2770 for (k = 1; ; k++) { 2771 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); 2772 if (!aalg) 2773 break; 2774 2775 if (aalg_tmpl_set(t, aalg) && aalg->available) 2776 sz += sizeof(struct sadb_comb); 2777 } 2778 } 2779 return sz + sizeof(struct sadb_prop); 2780 } 2781 2782 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t) 2783 { 2784 struct sadb_prop *p; 2785 int i; 2786 2787 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); 2788 p->sadb_prop_len = sizeof(struct sadb_prop)/8; 2789 p->sadb_prop_exttype = SADB_EXT_PROPOSAL; 2790 p->sadb_prop_replay = 32; 2791 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); 2792 2793 for (i = 0; ; i++) { 2794 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); 2795 if (!aalg) 2796 break; 2797 2798 if (aalg_tmpl_set(t, aalg) && aalg->available) { 2799 struct sadb_comb *c; 2800 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); 2801 memset(c, 0, sizeof(*c)); 2802 p->sadb_prop_len += sizeof(struct sadb_comb)/8; 2803 c->sadb_comb_auth = aalg->desc.sadb_alg_id; 2804 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; 2805 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; 2806 c->sadb_comb_hard_addtime = 24*60*60; 2807 c->sadb_comb_soft_addtime = 20*60*60; 2808 c->sadb_comb_hard_usetime = 8*60*60; 2809 c->sadb_comb_soft_usetime = 7*60*60; 2810 } 2811 } 2812 } 2813 2814 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t) 2815 { 2816 struct sadb_prop *p; 2817 int i, k; 2818 2819 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); 2820 p->sadb_prop_len = sizeof(struct sadb_prop)/8; 2821 p->sadb_prop_exttype = SADB_EXT_PROPOSAL; 2822 p->sadb_prop_replay = 32; 2823 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); 2824 2825 for (i=0; ; i++) { 2826 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); 2827 if (!ealg) 2828 break; 2829 2830 if (!(ealg_tmpl_set(t, ealg) && ealg->available)) 2831 continue; 2832 2833 for (k = 1; ; k++) { 2834 struct sadb_comb *c; 2835 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); 2836 if (!aalg) 2837 break; 2838 if (!(aalg_tmpl_set(t, aalg) && aalg->available)) 2839 continue; 2840 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); 2841 memset(c, 0, sizeof(*c)); 2842 p->sadb_prop_len += sizeof(struct sadb_comb)/8; 2843 c->sadb_comb_auth = aalg->desc.sadb_alg_id; 2844 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; 2845 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; 2846 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id; 2847 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits; 2848 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits; 2849 c->sadb_comb_hard_addtime = 24*60*60; 2850 c->sadb_comb_soft_addtime = 20*60*60; 2851 c->sadb_comb_hard_usetime = 8*60*60; 2852 c->sadb_comb_soft_usetime = 7*60*60; 2853 } 2854 } 2855 } 2856 2857 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c) 2858 { 2859 return 0; 2860 } 2861 2862 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c) 2863 { 2864 struct sk_buff *out_skb; 2865 struct sadb_msg *out_hdr; 2866 int hard; 2867 int hsc; 2868 2869 hard = c->data.hard; 2870 if (hard) 2871 hsc = 2; 2872 else 2873 hsc = 1; 2874 2875 out_skb = pfkey_xfrm_state2msg_expire(x, hsc); 2876 if (IS_ERR(out_skb)) 2877 return PTR_ERR(out_skb); 2878 2879 out_hdr = (struct sadb_msg *) out_skb->data; 2880 out_hdr->sadb_msg_version = PF_KEY_V2; 2881 out_hdr->sadb_msg_type = SADB_EXPIRE; 2882 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); 2883 out_hdr->sadb_msg_errno = 0; 2884 out_hdr->sadb_msg_reserved = 0; 2885 out_hdr->sadb_msg_seq = 0; 2886 out_hdr->sadb_msg_pid = 0; 2887 2888 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); 2889 return 0; 2890 } 2891 2892 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c) 2893 { 2894 if (atomic_read(&pfkey_socks_nr) == 0) 2895 return 0; 2896 2897 switch (c->event) { 2898 case XFRM_MSG_EXPIRE: 2899 return key_notify_sa_expire(x, c); 2900 case XFRM_MSG_DELSA: 2901 case XFRM_MSG_NEWSA: 2902 case XFRM_MSG_UPDSA: 2903 return key_notify_sa(x, c); 2904 case XFRM_MSG_FLUSHSA: 2905 return key_notify_sa_flush(c); 2906 case XFRM_MSG_NEWAE: /* not yet supported */ 2907 break; 2908 default: 2909 printk("pfkey: Unknown SA event %d\n", c->event); 2910 break; 2911 } 2912 2913 return 0; 2914 } 2915 2916 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) 2917 { 2918 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN) 2919 return 0; 2920 2921 switch (c->event) { 2922 case XFRM_MSG_POLEXPIRE: 2923 return key_notify_policy_expire(xp, c); 2924 case XFRM_MSG_DELPOLICY: 2925 case XFRM_MSG_NEWPOLICY: 2926 case XFRM_MSG_UPDPOLICY: 2927 return key_notify_policy(xp, dir, c); 2928 case XFRM_MSG_FLUSHPOLICY: 2929 if (c->data.type != XFRM_POLICY_TYPE_MAIN) 2930 break; 2931 return key_notify_policy_flush(c); 2932 default: 2933 printk("pfkey: Unknown policy event %d\n", c->event); 2934 break; 2935 } 2936 2937 return 0; 2938 } 2939 2940 static u32 get_acqseq(void) 2941 { 2942 u32 res; 2943 static u32 acqseq; 2944 static DEFINE_SPINLOCK(acqseq_lock); 2945 2946 spin_lock_bh(&acqseq_lock); 2947 res = (++acqseq ? : ++acqseq); 2948 spin_unlock_bh(&acqseq_lock); 2949 return res; 2950 } 2951 2952 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir) 2953 { 2954 struct sk_buff *skb; 2955 struct sadb_msg *hdr; 2956 struct sadb_address *addr; 2957 struct sadb_x_policy *pol; 2958 int sockaddr_size; 2959 int size; 2960 struct sadb_x_sec_ctx *sec_ctx; 2961 struct xfrm_sec_ctx *xfrm_ctx; 2962 int ctx_size = 0; 2963 2964 sockaddr_size = pfkey_sockaddr_size(x->props.family); 2965 if (!sockaddr_size) 2966 return -EINVAL; 2967 2968 size = sizeof(struct sadb_msg) + 2969 (sizeof(struct sadb_address) * 2) + 2970 (sockaddr_size * 2) + 2971 sizeof(struct sadb_x_policy); 2972 2973 if (x->id.proto == IPPROTO_AH) 2974 size += count_ah_combs(t); 2975 else if (x->id.proto == IPPROTO_ESP) 2976 size += count_esp_combs(t); 2977 2978 if ((xfrm_ctx = x->security)) { 2979 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); 2980 size += sizeof(struct sadb_x_sec_ctx) + ctx_size; 2981 } 2982 2983 skb = alloc_skb(size + 16, GFP_ATOMIC); 2984 if (skb == NULL) 2985 return -ENOMEM; 2986 2987 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); 2988 hdr->sadb_msg_version = PF_KEY_V2; 2989 hdr->sadb_msg_type = SADB_ACQUIRE; 2990 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); 2991 hdr->sadb_msg_len = size / sizeof(uint64_t); 2992 hdr->sadb_msg_errno = 0; 2993 hdr->sadb_msg_reserved = 0; 2994 hdr->sadb_msg_seq = x->km.seq = get_acqseq(); 2995 hdr->sadb_msg_pid = 0; 2996 2997 /* src address */ 2998 addr = (struct sadb_address*) skb_put(skb, 2999 sizeof(struct sadb_address)+sockaddr_size); 3000 addr->sadb_address_len = 3001 (sizeof(struct sadb_address)+sockaddr_size)/ 3002 sizeof(uint64_t); 3003 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; 3004 addr->sadb_address_proto = 0; 3005 addr->sadb_address_reserved = 0; 3006 addr->sadb_address_prefixlen = 3007 pfkey_sockaddr_fill(&x->props.saddr, 0, 3008 (struct sockaddr *) (addr + 1), 3009 x->props.family); 3010 if (!addr->sadb_address_prefixlen) 3011 BUG(); 3012 3013 /* dst address */ 3014 addr = (struct sadb_address*) skb_put(skb, 3015 sizeof(struct sadb_address)+sockaddr_size); 3016 addr->sadb_address_len = 3017 (sizeof(struct sadb_address)+sockaddr_size)/ 3018 sizeof(uint64_t); 3019 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; 3020 addr->sadb_address_proto = 0; 3021 addr->sadb_address_reserved = 0; 3022 addr->sadb_address_prefixlen = 3023 pfkey_sockaddr_fill(&x->id.daddr, 0, 3024 (struct sockaddr *) (addr + 1), 3025 x->props.family); 3026 if (!addr->sadb_address_prefixlen) 3027 BUG(); 3028 3029 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); 3030 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); 3031 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3032 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; 3033 pol->sadb_x_policy_dir = dir+1; 3034 pol->sadb_x_policy_id = xp->index; 3035 3036 /* Set sadb_comb's. */ 3037 if (x->id.proto == IPPROTO_AH) 3038 dump_ah_combs(skb, t); 3039 else if (x->id.proto == IPPROTO_ESP) 3040 dump_esp_combs(skb, t); 3041 3042 /* security context */ 3043 if (xfrm_ctx) { 3044 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, 3045 sizeof(struct sadb_x_sec_ctx) + ctx_size); 3046 sec_ctx->sadb_x_sec_len = 3047 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); 3048 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; 3049 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; 3050 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; 3051 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; 3052 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, 3053 xfrm_ctx->ctx_len); 3054 } 3055 3056 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); 3057 } 3058 3059 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt, 3060 u8 *data, int len, int *dir) 3061 { 3062 struct xfrm_policy *xp; 3063 struct sadb_x_policy *pol = (struct sadb_x_policy*)data; 3064 struct sadb_x_sec_ctx *sec_ctx; 3065 3066 switch (sk->sk_family) { 3067 case AF_INET: 3068 if (opt != IP_IPSEC_POLICY) { 3069 *dir = -EOPNOTSUPP; 3070 return NULL; 3071 } 3072 break; 3073 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 3074 case AF_INET6: 3075 if (opt != IPV6_IPSEC_POLICY) { 3076 *dir = -EOPNOTSUPP; 3077 return NULL; 3078 } 3079 break; 3080 #endif 3081 default: 3082 *dir = -EINVAL; 3083 return NULL; 3084 } 3085 3086 *dir = -EINVAL; 3087 3088 if (len < sizeof(struct sadb_x_policy) || 3089 pol->sadb_x_policy_len*8 > len || 3090 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS || 3091 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND)) 3092 return NULL; 3093 3094 xp = xfrm_policy_alloc(GFP_ATOMIC); 3095 if (xp == NULL) { 3096 *dir = -ENOBUFS; 3097 return NULL; 3098 } 3099 3100 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? 3101 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); 3102 3103 xp->lft.soft_byte_limit = XFRM_INF; 3104 xp->lft.hard_byte_limit = XFRM_INF; 3105 xp->lft.soft_packet_limit = XFRM_INF; 3106 xp->lft.hard_packet_limit = XFRM_INF; 3107 xp->family = sk->sk_family; 3108 3109 xp->xfrm_nr = 0; 3110 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && 3111 (*dir = parse_ipsecrequests(xp, pol)) < 0) 3112 goto out; 3113 3114 /* security context too */ 3115 if (len >= (pol->sadb_x_policy_len*8 + 3116 sizeof(struct sadb_x_sec_ctx))) { 3117 char *p = (char *)pol; 3118 struct xfrm_user_sec_ctx *uctx; 3119 3120 p += pol->sadb_x_policy_len*8; 3121 sec_ctx = (struct sadb_x_sec_ctx *)p; 3122 if (len < pol->sadb_x_policy_len*8 + 3123 sec_ctx->sadb_x_sec_len) { 3124 *dir = -EINVAL; 3125 goto out; 3126 } 3127 if ((*dir = verify_sec_ctx_len(p))) 3128 goto out; 3129 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); 3130 *dir = security_xfrm_policy_alloc(&xp->security, uctx); 3131 kfree(uctx); 3132 3133 if (*dir) 3134 goto out; 3135 } 3136 3137 *dir = pol->sadb_x_policy_dir-1; 3138 return xp; 3139 3140 out: 3141 xfrm_policy_destroy(xp); 3142 return NULL; 3143 } 3144 3145 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) 3146 { 3147 struct sk_buff *skb; 3148 struct sadb_msg *hdr; 3149 struct sadb_sa *sa; 3150 struct sadb_address *addr; 3151 struct sadb_x_nat_t_port *n_port; 3152 int sockaddr_size; 3153 int size; 3154 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0); 3155 struct xfrm_encap_tmpl *natt = NULL; 3156 3157 sockaddr_size = pfkey_sockaddr_size(x->props.family); 3158 if (!sockaddr_size) 3159 return -EINVAL; 3160 3161 if (!satype) 3162 return -EINVAL; 3163 3164 if (!x->encap) 3165 return -EINVAL; 3166 3167 natt = x->encap; 3168 3169 /* Build an SADB_X_NAT_T_NEW_MAPPING message: 3170 * 3171 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) | 3172 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port) 3173 */ 3174 3175 size = sizeof(struct sadb_msg) + 3176 sizeof(struct sadb_sa) + 3177 (sizeof(struct sadb_address) * 2) + 3178 (sockaddr_size * 2) + 3179 (sizeof(struct sadb_x_nat_t_port) * 2); 3180 3181 skb = alloc_skb(size + 16, GFP_ATOMIC); 3182 if (skb == NULL) 3183 return -ENOMEM; 3184 3185 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); 3186 hdr->sadb_msg_version = PF_KEY_V2; 3187 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING; 3188 hdr->sadb_msg_satype = satype; 3189 hdr->sadb_msg_len = size / sizeof(uint64_t); 3190 hdr->sadb_msg_errno = 0; 3191 hdr->sadb_msg_reserved = 0; 3192 hdr->sadb_msg_seq = x->km.seq = get_acqseq(); 3193 hdr->sadb_msg_pid = 0; 3194 3195 /* SA */ 3196 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); 3197 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); 3198 sa->sadb_sa_exttype = SADB_EXT_SA; 3199 sa->sadb_sa_spi = x->id.spi; 3200 sa->sadb_sa_replay = 0; 3201 sa->sadb_sa_state = 0; 3202 sa->sadb_sa_auth = 0; 3203 sa->sadb_sa_encrypt = 0; 3204 sa->sadb_sa_flags = 0; 3205 3206 /* ADDRESS_SRC (old addr) */ 3207 addr = (struct sadb_address*) 3208 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); 3209 addr->sadb_address_len = 3210 (sizeof(struct sadb_address)+sockaddr_size)/ 3211 sizeof(uint64_t); 3212 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; 3213 addr->sadb_address_proto = 0; 3214 addr->sadb_address_reserved = 0; 3215 addr->sadb_address_prefixlen = 3216 pfkey_sockaddr_fill(&x->props.saddr, 0, 3217 (struct sockaddr *) (addr + 1), 3218 x->props.family); 3219 if (!addr->sadb_address_prefixlen) 3220 BUG(); 3221 3222 /* NAT_T_SPORT (old port) */ 3223 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); 3224 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); 3225 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; 3226 n_port->sadb_x_nat_t_port_port = natt->encap_sport; 3227 n_port->sadb_x_nat_t_port_reserved = 0; 3228 3229 /* ADDRESS_DST (new addr) */ 3230 addr = (struct sadb_address*) 3231 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); 3232 addr->sadb_address_len = 3233 (sizeof(struct sadb_address)+sockaddr_size)/ 3234 sizeof(uint64_t); 3235 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; 3236 addr->sadb_address_proto = 0; 3237 addr->sadb_address_reserved = 0; 3238 addr->sadb_address_prefixlen = 3239 pfkey_sockaddr_fill(ipaddr, 0, 3240 (struct sockaddr *) (addr + 1), 3241 x->props.family); 3242 if (!addr->sadb_address_prefixlen) 3243 BUG(); 3244 3245 /* NAT_T_DPORT (new port) */ 3246 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); 3247 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); 3248 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; 3249 n_port->sadb_x_nat_t_port_port = sport; 3250 n_port->sadb_x_nat_t_port_reserved = 0; 3251 3252 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); 3253 } 3254 3255 #ifdef CONFIG_NET_KEY_MIGRATE 3256 static int set_sadb_address(struct sk_buff *skb, int sasize, int type, 3257 struct xfrm_selector *sel) 3258 { 3259 struct sadb_address *addr; 3260 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize); 3261 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8; 3262 addr->sadb_address_exttype = type; 3263 addr->sadb_address_proto = sel->proto; 3264 addr->sadb_address_reserved = 0; 3265 3266 switch (type) { 3267 case SADB_EXT_ADDRESS_SRC: 3268 addr->sadb_address_prefixlen = sel->prefixlen_s; 3269 pfkey_sockaddr_fill(&sel->saddr, 0, 3270 (struct sockaddr *)(addr + 1), 3271 sel->family); 3272 break; 3273 case SADB_EXT_ADDRESS_DST: 3274 addr->sadb_address_prefixlen = sel->prefixlen_d; 3275 pfkey_sockaddr_fill(&sel->daddr, 0, 3276 (struct sockaddr *)(addr + 1), 3277 sel->family); 3278 break; 3279 default: 3280 return -EINVAL; 3281 } 3282 3283 return 0; 3284 } 3285 3286 static int set_ipsecrequest(struct sk_buff *skb, 3287 uint8_t proto, uint8_t mode, int level, 3288 uint32_t reqid, uint8_t family, 3289 xfrm_address_t *src, xfrm_address_t *dst) 3290 { 3291 struct sadb_x_ipsecrequest *rq; 3292 u8 *sa; 3293 int socklen = pfkey_sockaddr_len(family); 3294 int size_req; 3295 3296 size_req = sizeof(struct sadb_x_ipsecrequest) + 3297 pfkey_sockaddr_pair_size(family); 3298 3299 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req); 3300 memset(rq, 0, size_req); 3301 rq->sadb_x_ipsecrequest_len = size_req; 3302 rq->sadb_x_ipsecrequest_proto = proto; 3303 rq->sadb_x_ipsecrequest_mode = mode; 3304 rq->sadb_x_ipsecrequest_level = level; 3305 rq->sadb_x_ipsecrequest_reqid = reqid; 3306 3307 sa = (u8 *) (rq + 1); 3308 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) || 3309 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family)) 3310 return -EINVAL; 3311 3312 return 0; 3313 } 3314 #endif 3315 3316 #ifdef CONFIG_NET_KEY_MIGRATE 3317 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 3318 struct xfrm_migrate *m, int num_bundles) 3319 { 3320 int i; 3321 int sasize_sel; 3322 int size = 0; 3323 int size_pol = 0; 3324 struct sk_buff *skb; 3325 struct sadb_msg *hdr; 3326 struct sadb_x_policy *pol; 3327 struct xfrm_migrate *mp; 3328 3329 if (type != XFRM_POLICY_TYPE_MAIN) 3330 return 0; 3331 3332 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH) 3333 return -EINVAL; 3334 3335 /* selector */ 3336 sasize_sel = pfkey_sockaddr_size(sel->family); 3337 if (!sasize_sel) 3338 return -EINVAL; 3339 size += (sizeof(struct sadb_address) + sasize_sel) * 2; 3340 3341 /* policy info */ 3342 size_pol += sizeof(struct sadb_x_policy); 3343 3344 /* ipsecrequests */ 3345 for (i = 0, mp = m; i < num_bundles; i++, mp++) { 3346 /* old locator pair */ 3347 size_pol += sizeof(struct sadb_x_ipsecrequest) + 3348 pfkey_sockaddr_pair_size(mp->old_family); 3349 /* new locator pair */ 3350 size_pol += sizeof(struct sadb_x_ipsecrequest) + 3351 pfkey_sockaddr_pair_size(mp->new_family); 3352 } 3353 3354 size += sizeof(struct sadb_msg) + size_pol; 3355 3356 /* alloc buffer */ 3357 skb = alloc_skb(size, GFP_ATOMIC); 3358 if (skb == NULL) 3359 return -ENOMEM; 3360 3361 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg)); 3362 hdr->sadb_msg_version = PF_KEY_V2; 3363 hdr->sadb_msg_type = SADB_X_MIGRATE; 3364 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto); 3365 hdr->sadb_msg_len = size / 8; 3366 hdr->sadb_msg_errno = 0; 3367 hdr->sadb_msg_reserved = 0; 3368 hdr->sadb_msg_seq = 0; 3369 hdr->sadb_msg_pid = 0; 3370 3371 /* selector src */ 3372 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel); 3373 3374 /* selector dst */ 3375 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel); 3376 3377 /* policy information */ 3378 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy)); 3379 pol->sadb_x_policy_len = size_pol / 8; 3380 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3381 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; 3382 pol->sadb_x_policy_dir = dir + 1; 3383 pol->sadb_x_policy_id = 0; 3384 pol->sadb_x_policy_priority = 0; 3385 3386 for (i = 0, mp = m; i < num_bundles; i++, mp++) { 3387 /* old ipsecrequest */ 3388 int mode = pfkey_mode_from_xfrm(mp->mode); 3389 if (mode < 0) 3390 goto err; 3391 if (set_ipsecrequest(skb, mp->proto, mode, 3392 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), 3393 mp->reqid, mp->old_family, 3394 &mp->old_saddr, &mp->old_daddr) < 0) 3395 goto err; 3396 3397 /* new ipsecrequest */ 3398 if (set_ipsecrequest(skb, mp->proto, mode, 3399 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), 3400 mp->reqid, mp->new_family, 3401 &mp->new_saddr, &mp->new_daddr) < 0) 3402 goto err; 3403 } 3404 3405 /* broadcast migrate message to sockets */ 3406 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL); 3407 3408 return 0; 3409 3410 err: 3411 kfree_skb(skb); 3412 return -EINVAL; 3413 } 3414 #else 3415 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 3416 struct xfrm_migrate *m, int num_bundles) 3417 { 3418 return -ENOPROTOOPT; 3419 } 3420 #endif 3421 3422 static int pfkey_sendmsg(struct kiocb *kiocb, 3423 struct socket *sock, struct msghdr *msg, size_t len) 3424 { 3425 struct sock *sk = sock->sk; 3426 struct sk_buff *skb = NULL; 3427 struct sadb_msg *hdr = NULL; 3428 int err; 3429 3430 err = -EOPNOTSUPP; 3431 if (msg->msg_flags & MSG_OOB) 3432 goto out; 3433 3434 err = -EMSGSIZE; 3435 if ((unsigned)len > sk->sk_sndbuf - 32) 3436 goto out; 3437 3438 err = -ENOBUFS; 3439 skb = alloc_skb(len, GFP_KERNEL); 3440 if (skb == NULL) 3441 goto out; 3442 3443 err = -EFAULT; 3444 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len)) 3445 goto out; 3446 3447 hdr = pfkey_get_base_msg(skb, &err); 3448 if (!hdr) 3449 goto out; 3450 3451 mutex_lock(&xfrm_cfg_mutex); 3452 err = pfkey_process(sk, skb, hdr); 3453 mutex_unlock(&xfrm_cfg_mutex); 3454 3455 out: 3456 if (err && hdr && pfkey_error(hdr, err, sk) == 0) 3457 err = 0; 3458 if (skb) 3459 kfree_skb(skb); 3460 3461 return err ? : len; 3462 } 3463 3464 static int pfkey_recvmsg(struct kiocb *kiocb, 3465 struct socket *sock, struct msghdr *msg, size_t len, 3466 int flags) 3467 { 3468 struct sock *sk = sock->sk; 3469 struct pfkey_sock *pfk = pfkey_sk(sk); 3470 struct sk_buff *skb; 3471 int copied, err; 3472 3473 err = -EINVAL; 3474 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT)) 3475 goto out; 3476 3477 msg->msg_namelen = 0; 3478 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err); 3479 if (skb == NULL) 3480 goto out; 3481 3482 copied = skb->len; 3483 if (copied > len) { 3484 msg->msg_flags |= MSG_TRUNC; 3485 copied = len; 3486 } 3487 3488 skb_reset_transport_header(skb); 3489 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 3490 if (err) 3491 goto out_free; 3492 3493 sock_recv_timestamp(msg, sk, skb); 3494 3495 err = (flags & MSG_TRUNC) ? skb->len : copied; 3496 3497 if (pfk->dump.dump != NULL && 3498 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) 3499 pfkey_do_dump(pfk); 3500 3501 out_free: 3502 skb_free_datagram(sk, skb); 3503 out: 3504 return err; 3505 } 3506 3507 static const struct proto_ops pfkey_ops = { 3508 .family = PF_KEY, 3509 .owner = THIS_MODULE, 3510 /* Operations that make no sense on pfkey sockets. */ 3511 .bind = sock_no_bind, 3512 .connect = sock_no_connect, 3513 .socketpair = sock_no_socketpair, 3514 .accept = sock_no_accept, 3515 .getname = sock_no_getname, 3516 .ioctl = sock_no_ioctl, 3517 .listen = sock_no_listen, 3518 .shutdown = sock_no_shutdown, 3519 .setsockopt = sock_no_setsockopt, 3520 .getsockopt = sock_no_getsockopt, 3521 .mmap = sock_no_mmap, 3522 .sendpage = sock_no_sendpage, 3523 3524 /* Now the operations that really occur. */ 3525 .release = pfkey_release, 3526 .poll = datagram_poll, 3527 .sendmsg = pfkey_sendmsg, 3528 .recvmsg = pfkey_recvmsg, 3529 }; 3530 3531 static struct net_proto_family pfkey_family_ops = { 3532 .family = PF_KEY, 3533 .create = pfkey_create, 3534 .owner = THIS_MODULE, 3535 }; 3536 3537 #ifdef CONFIG_PROC_FS 3538 static int pfkey_seq_show(struct seq_file *f, void *v) 3539 { 3540 struct sock *s; 3541 3542 s = (struct sock *)v; 3543 if (v == SEQ_START_TOKEN) 3544 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n"); 3545 else 3546 seq_printf(f ,"%p %-6d %-6u %-6u %-6u %-6lu\n", 3547 s, 3548 atomic_read(&s->sk_refcnt), 3549 atomic_read(&s->sk_rmem_alloc), 3550 atomic_read(&s->sk_wmem_alloc), 3551 sock_i_uid(s), 3552 sock_i_ino(s) 3553 ); 3554 return 0; 3555 } 3556 3557 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos) 3558 { 3559 struct sock *s; 3560 struct hlist_node *node; 3561 loff_t pos = *ppos; 3562 3563 read_lock(&pfkey_table_lock); 3564 if (pos == 0) 3565 return SEQ_START_TOKEN; 3566 3567 sk_for_each(s, node, &pfkey_table) 3568 if (pos-- == 1) 3569 return s; 3570 3571 return NULL; 3572 } 3573 3574 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos) 3575 { 3576 ++*ppos; 3577 return (v == SEQ_START_TOKEN) ? 3578 sk_head(&pfkey_table) : 3579 sk_next((struct sock *)v); 3580 } 3581 3582 static void pfkey_seq_stop(struct seq_file *f, void *v) 3583 { 3584 read_unlock(&pfkey_table_lock); 3585 } 3586 3587 static struct seq_operations pfkey_seq_ops = { 3588 .start = pfkey_seq_start, 3589 .next = pfkey_seq_next, 3590 .stop = pfkey_seq_stop, 3591 .show = pfkey_seq_show, 3592 }; 3593 3594 static int pfkey_seq_open(struct inode *inode, struct file *file) 3595 { 3596 return seq_open(file, &pfkey_seq_ops); 3597 } 3598 3599 static struct file_operations pfkey_proc_ops = { 3600 .open = pfkey_seq_open, 3601 .read = seq_read, 3602 .llseek = seq_lseek, 3603 .release = seq_release, 3604 }; 3605 3606 static int pfkey_init_proc(void) 3607 { 3608 struct proc_dir_entry *e; 3609 3610 e = proc_net_fops_create(&init_net, "pfkey", 0, &pfkey_proc_ops); 3611 if (e == NULL) 3612 return -ENOMEM; 3613 3614 return 0; 3615 } 3616 3617 static void pfkey_exit_proc(void) 3618 { 3619 proc_net_remove(&init_net, "pfkey"); 3620 } 3621 #else 3622 static inline int pfkey_init_proc(void) 3623 { 3624 return 0; 3625 } 3626 3627 static inline void pfkey_exit_proc(void) 3628 { 3629 } 3630 #endif 3631 3632 static struct xfrm_mgr pfkeyv2_mgr = 3633 { 3634 .id = "pfkeyv2", 3635 .notify = pfkey_send_notify, 3636 .acquire = pfkey_send_acquire, 3637 .compile_policy = pfkey_compile_policy, 3638 .new_mapping = pfkey_send_new_mapping, 3639 .notify_policy = pfkey_send_policy_notify, 3640 .migrate = pfkey_send_migrate, 3641 }; 3642 3643 static void __exit ipsec_pfkey_exit(void) 3644 { 3645 xfrm_unregister_km(&pfkeyv2_mgr); 3646 pfkey_exit_proc(); 3647 sock_unregister(PF_KEY); 3648 proto_unregister(&key_proto); 3649 } 3650 3651 static int __init ipsec_pfkey_init(void) 3652 { 3653 int err = proto_register(&key_proto, 0); 3654 3655 if (err != 0) 3656 goto out; 3657 3658 err = sock_register(&pfkey_family_ops); 3659 if (err != 0) 3660 goto out_unregister_key_proto; 3661 err = pfkey_init_proc(); 3662 if (err != 0) 3663 goto out_sock_unregister; 3664 err = xfrm_register_km(&pfkeyv2_mgr); 3665 if (err != 0) 3666 goto out_remove_proc_entry; 3667 out: 3668 return err; 3669 out_remove_proc_entry: 3670 pfkey_exit_proc(); 3671 out_sock_unregister: 3672 sock_unregister(PF_KEY); 3673 out_unregister_key_proto: 3674 proto_unregister(&key_proto); 3675 goto out; 3676 } 3677 3678 module_init(ipsec_pfkey_init); 3679 module_exit(ipsec_pfkey_exit); 3680 MODULE_LICENSE("GPL"); 3681 MODULE_ALIAS_NETPROTO(PF_KEY); 3682