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   1 /*
   2  * net/key/af_key.c     An implementation of PF_KEYv2 sockets.
   3  *
   4  *              This program is free software; you can redistribute it and/or
   5  *              modify it under the terms of the GNU General Public License
   6  *              as published by the Free Software Foundation; either version
   7  *              2 of the License, or (at your option) any later version.
   8  *
   9  * Authors:     Maxim Giryaev   <gem@asplinux.ru>
  10  *              David S. Miller <davem@redhat.com>
  11  *              Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
  12  *              Kunihiro Ishiguro <kunihiro@ipinfusion.com>
  13  *              Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
  14  *              Derek Atkins <derek@ihtfp.com>
  15  */
  16
  17 #include <linux/capability.h>
  18 #include <linux/module.h>
  19 #include <linux/kernel.h>
  20 #include <linux/socket.h>
  21 #include <linux/pfkeyv2.h>
  22 #include <linux/ipsec.h>
  23 #include <linux/skbuff.h>
  24 #include <linux/rtnetlink.h>
  25 #include <linux/in.h>
  26 #include <linux/in6.h>
  27 #include <linux/proc_fs.h>
  28 #include <linux/init.h>
  29 #include <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
  53 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
  54 {
  55         return (struct pfkey_sock *)sk;
  56 }
  57
  58 static void pfkey_sock_destruct(struct sock *sk)
  59 {
  60         skb_queue_purge(&sk->sk_receive_queue);
  61
  62         if (!sock_flag(sk, SOCK_DEAD)) {
  63                 printk("Attempt to release alive pfkey socket: %p\n", sk);
  64                 return;
  65         }
  66
  67         BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
  68         BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
  69
  70         atomic_dec(&pfkey_socks_nr);
  71 }
  72
  73 static void pfkey_table_grab(void)
  74 {
  75         write_lock_bh(&pfkey_table_lock);
  76
  77         if (atomic_read(&pfkey_table_users)) {
  78                 DECLARE_WAITQUEUE(wait, current);
  79
  80                 add_wait_queue_exclusive(&pfkey_table_wait, &wait);
  81                 for(;;) {
  82                         set_current_state(TASK_UNINTERRUPTIBLE);
  83                         if (atomic_read(&pfkey_table_users) == 0)
  84                                 break;
  85                         write_unlock_bh(&pfkey_table_lock);
  86                         schedule();
  87                         write_lock_bh(&pfkey_table_lock);
  88                 }
  89
  90                 __set_current_state(TASK_RUNNING);
  91                 remove_wait_queue(&pfkey_table_wait, &wait);
  92         }
  93 }
  94
  95 static __inline__ void pfkey_table_ungrab(void)
  96 {
  97         write_unlock_bh(&pfkey_table_lock);
  98         wake_up(&pfkey_table_wait);
  99 }
 100
 101 static __inline__ void pfkey_lock_table(void)
 102 {
 103         /* read_lock() synchronizes us to pfkey_table_grab */
 104
 105         read_lock(&pfkey_table_lock);
 106         atomic_inc(&pfkey_table_users);
 107         read_unlock(&pfkey_table_lock);
 108 }
 109
 110 static __inline__ void pfkey_unlock_table(void)
 111 {
 112         if (atomic_dec_and_test(&pfkey_table_users))
 113                 wake_up(&pfkey_table_wait);
 114 }
 115
 116
 117 static const struct proto_ops pfkey_ops;
 118
 119 static void pfkey_insert(struct sock *sk)
 120 {
 121         pfkey_table_grab();
 122         sk_add_node(sk, &pfkey_table);
 123         pfkey_table_ungrab();
 124 }
 125
 126 static void pfkey_remove(struct sock *sk)
 127 {
 128         pfkey_table_grab();
 129         sk_del_node_init(sk);
 130         pfkey_table_ungrab();
 131 }
 132
 133 static struct proto key_proto = {
 134         .name     = "KEY",
 135         .owner    = THIS_MODULE,
 136         .obj_size = sizeof(struct pfkey_sock),
 137 };
 138
 139 static int pfkey_create(struct net *net, struct socket *sock, int protocol)
 140 {
 141         struct sock *sk;
 142         int err;
 143
 144         if (net != &init_net)
 145                 return -EAFNOSUPPORT;
 146
 147         if (!capable(CAP_NET_ADMIN))
 148                 return -EPERM;
 149         if (sock->type != SOCK_RAW)
 150                 return -ESOCKTNOSUPPORT;
 151         if (protocol != PF_KEY_V2)
 152                 return -EPROTONOSUPPORT;
 153
 154         err = -ENOMEM;
 155         sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
 156         if (sk == NULL)
 157                 goto out;
 158
 159         sock->ops = &pfkey_ops;
 160         sock_init_data(sock, sk);
 161
 162         sk->sk_family = PF_KEY;
 163         sk->sk_destruct = pfkey_sock_destruct;
 164
 165         atomic_inc(&pfkey_socks_nr);
 166
 167         pfkey_insert(sk);
 168
 169         return 0;
 170 out:
 171         return err;
 172 }
 173
 174 static int pfkey_release(struct socket *sock)
 175 {
 176         struct sock *sk = sock->sk;
 177
 178         if (!sk)
 179                 return 0;
 180
 181         pfkey_remove(sk);
 182
 183         sock_orphan(sk);
 184         sock->sk = NULL;
 185         skb_queue_purge(&sk->sk_write_queue);
 186         sock_put(sk);
 187
 188         return 0;
 189 }
 190
 191 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
 192                                gfp_t allocation, struct sock *sk)
 193 {
 194         int err = -ENOBUFS;
 195
 196         sock_hold(sk);
 197         if (*skb2 == NULL) {
 198                 if (atomic_read(&skb->users) != 1) {
 199                         *skb2 = skb_clone(skb, allocation);
 200                 } else {
 201                         *skb2 = skb;
 202                         atomic_inc(&skb->users);
 203                 }
 204         }
 205         if (*skb2 != NULL) {
 206                 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
 207                         skb_orphan(*skb2);
 208                         skb_set_owner_r(*skb2, sk);
 209                         skb_queue_tail(&sk->sk_receive_queue, *skb2);
 210                         sk->sk_data_ready(sk, (*skb2)->len);
 211                         *skb2 = NULL;
 212                         err = 0;
 213                 }
 214         }
 215         sock_put(sk);
 216         return err;
 217 }
 218
 219 /* Send SKB to all pfkey sockets matching selected criteria.  */
 220 #define BROADCAST_ALL           0
 221 #define BROADCAST_ONE           1
 222 #define BROADCAST_REGISTERED    2
 223 #define BROADCAST_PROMISC_ONLY  4
 224 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
 225                            int broadcast_flags, struct sock *one_sk)
 226 {
 227         struct sock *sk;
 228         struct hlist_node *node;
 229         struct sk_buff *skb2 = NULL;
 230         int err = -ESRCH;
 231
 232         /* XXX Do we need something like netlink_overrun?  I think
 233          * XXX PF_KEY socket apps will not mind current behavior.
 234          */
 235         if (!skb)
 236                 return -ENOMEM;
 237
 238         pfkey_lock_table();
 239         sk_for_each(sk, node, &pfkey_table) {
 240                 struct pfkey_sock *pfk = pfkey_sk(sk);
 241                 int err2;
 242
 243                 /* Yes, it means that if you are meant to receive this
 244                  * pfkey message you receive it twice as promiscuous
 245                  * socket.
 246                  */
 247                 if (pfk->promisc)
 248                         pfkey_broadcast_one(skb, &skb2, allocation, sk);
 249
 250                 /* the exact target will be processed later */
 251                 if (sk == one_sk)
 252                         continue;
 253                 if (broadcast_flags != BROADCAST_ALL) {
 254                         if (broadcast_flags & BROADCAST_PROMISC_ONLY)
 255                                 continue;
 256                         if ((broadcast_flags & BROADCAST_REGISTERED) &&
 257                             !pfk->registered)
 258                                 continue;
 259                         if (broadcast_flags & BROADCAST_ONE)
 260                                 continue;
 261                 }
 262
 263                 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
 264
 265                 /* Error is cleare after succecful sending to at least one
 266                  * registered KM */
 267                 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
 268                         err = err2;
 269         }
 270         pfkey_unlock_table();
 271
 272         if (one_sk != NULL)
 273                 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
 274
 275         if (skb2)
 276                 kfree_skb(skb2);
 277         kfree_skb(skb);
 278         return err;
 279 }
 280
 281 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
 282 {
 283         *new = *orig;
 284 }
 285
 286 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
 287 {
 288         struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
 289         struct sadb_msg *hdr;
 290
 291         if (!skb)
 292                 return -ENOBUFS;
 293
 294         /* Woe be to the platform trying to support PFKEY yet
 295          * having normal errnos outside the 1-255 range, inclusive.
 296          */
 297         err = -err;
 298         if (err == ERESTARTSYS ||
 299             err == ERESTARTNOHAND ||
 300             err == ERESTARTNOINTR)
 301                 err = EINTR;
 302         if (err >= 512)
 303                 err = EINVAL;
 304         BUG_ON(err <= 0 || err >= 256);
 305
 306         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
 307         pfkey_hdr_dup(hdr, orig);
 308         hdr->sadb_msg_errno = (uint8_t) err;
 309         hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
 310                              sizeof(uint64_t));
 311
 312         pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
 313
 314         return 0;
 315 }
 316
 317 static u8 sadb_ext_min_len[] = {
 318         [SADB_EXT_RESERVED]             = (u8) 0,
 319         [SADB_EXT_SA]                   = (u8) sizeof(struct sadb_sa),
 320         [SADB_EXT_LIFETIME_CURRENT]     = (u8) sizeof(struct sadb_lifetime),
 321         [SADB_EXT_LIFETIME_HARD]        = (u8) sizeof(struct sadb_lifetime),
 322         [SADB_EXT_LIFETIME_SOFT]        = (u8) sizeof(struct sadb_lifetime),
 323         [SADB_EXT_ADDRESS_SRC]          = (u8) sizeof(struct sadb_address),
 324         [SADB_EXT_ADDRESS_DST]          = (u8) sizeof(struct sadb_address),
 325         [SADB_EXT_ADDRESS_PROXY]        = (u8) sizeof(struct sadb_address),
 326         [SADB_EXT_KEY_AUTH]             = (u8) sizeof(struct sadb_key),
 327         [SADB_EXT_KEY_ENCRYPT]          = (u8) sizeof(struct sadb_key),
 328         [SADB_EXT_IDENTITY_SRC]         = (u8) sizeof(struct sadb_ident),
 329         [SADB_EXT_IDENTITY_DST]         = (u8) sizeof(struct sadb_ident),
 330         [SADB_EXT_SENSITIVITY]          = (u8) sizeof(struct sadb_sens),
 331         [SADB_EXT_PROPOSAL]             = (u8) sizeof(struct sadb_prop),
 332         [SADB_EXT_SUPPORTED_AUTH]       = (u8) sizeof(struct sadb_supported),
 333         [SADB_EXT_SUPPORTED_ENCRYPT]    = (u8) sizeof(struct sadb_supported),
 334         [SADB_EXT_SPIRANGE]             = (u8) sizeof(struct sadb_spirange),
 335         [SADB_X_EXT_KMPRIVATE]          = (u8) sizeof(struct sadb_x_kmprivate),
 336         [SADB_X_EXT_POLICY]             = (u8) sizeof(struct sadb_x_policy),
 337         [SADB_X_EXT_SA2]                = (u8) sizeof(struct sadb_x_sa2),
 338         [SADB_X_EXT_NAT_T_TYPE]         = (u8) sizeof(struct sadb_x_nat_t_type),
 339         [SADB_X_EXT_NAT_T_SPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
 340         [SADB_X_EXT_NAT_T_DPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
 341         [SADB_X_EXT_NAT_T_OA]           = (u8) sizeof(struct sadb_address),
 342         [SADB_X_EXT_SEC_CTX]            = (u8) sizeof(struct sadb_x_sec_ctx),
 343 };
 344
 345 /* Verify sadb_address_{len,prefixlen} against sa_family.  */
 346 static int verify_address_len(void *p)
 347 {
 348         struct sadb_address *sp = p;
 349         struct sockaddr *addr = (struct sockaddr *)(sp + 1);
 350         struct sockaddr_in *sin;
 351 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 352         struct sockaddr_in6 *sin6;
 353 #endif
 354         int len;
 355
 356         switch (addr->sa_family) {
 357         case AF_INET:
 358                 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
 359                 if (sp->sadb_address_len != len ||
 360                     sp->sadb_address_prefixlen > 32)
 361                         return -EINVAL;
 362                 break;
 363 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 364         case AF_INET6:
 365                 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
 366                 if (sp->sadb_address_len != len ||
 367                     sp->sadb_address_prefixlen > 128)
 368                         return -EINVAL;
 369                 break;
 370 #endif
 371         default:
 372                 /* It is user using kernel to keep track of security
 373                  * associations for another protocol, such as
 374                  * OSPF/RSVP/RIPV2/MIP.  It is user's job to verify
 375                  * lengths.
 376                  *
 377                  * XXX Actually, association/policy database is not yet
 378                  * XXX able to cope with arbitrary sockaddr families.
 379                  * XXX When it can, remove this -EINVAL.  -DaveM
 380                  */
 381                 return -EINVAL;
 382                 break;
 383         }
 384
 385         return 0;
 386 }
 387
 388 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
 389 {
 390         return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
 391                             sec_ctx->sadb_x_ctx_len,
 392                             sizeof(uint64_t));
 393 }
 394
 395 static inline int verify_sec_ctx_len(void *p)
 396 {
 397         struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
 398         int len = sec_ctx->sadb_x_ctx_len;
 399
 400         if (len > PAGE_SIZE)
 401                 return -EINVAL;
 402
 403         len = pfkey_sec_ctx_len(sec_ctx);
 404
 405         if (sec_ctx->sadb_x_sec_len != len)
 406                 return -EINVAL;
 407
 408         return 0;
 409 }
 410
 411 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
 412 {
 413         struct xfrm_user_sec_ctx *uctx = NULL;
 414         int ctx_size = sec_ctx->sadb_x_ctx_len;
 415
 416         uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
 417
 418         if (!uctx)
 419                 return NULL;
 420
 421         uctx->len = pfkey_sec_ctx_len(sec_ctx);
 422         uctx->exttype = sec_ctx->sadb_x_sec_exttype;
 423         uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
 424         uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
 425         uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
 426         memcpy(uctx + 1, sec_ctx + 1,
 427                uctx->ctx_len);
 428
 429         return uctx;
 430 }
 431
 432 static int present_and_same_family(struct sadb_address *src,
 433                                    struct sadb_address *dst)
 434 {
 435         struct sockaddr *s_addr, *d_addr;
 436
 437         if (!src || !dst)
 438                 return 0;
 439
 440         s_addr = (struct sockaddr *)(src + 1);
 441         d_addr = (struct sockaddr *)(dst + 1);
 442         if (s_addr->sa_family != d_addr->sa_family)
 443                 return 0;
 444         if (s_addr->sa_family != AF_INET
 445 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 446             && s_addr->sa_family != AF_INET6
 447 #endif
 448                 )
 449                 return 0;
 450
 451         return 1;
 452 }
 453
 454 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
 455 {
 456         char *p = (char *) hdr;
 457         int len = skb->len;
 458
 459         len -= sizeof(*hdr);
 460         p += sizeof(*hdr);
 461         while (len > 0) {
 462                 struct sadb_ext *ehdr = (struct sadb_ext *) p;
 463                 uint16_t ext_type;
 464                 int ext_len;
 465
 466                 ext_len  = ehdr->sadb_ext_len;
 467                 ext_len *= sizeof(uint64_t);
 468                 ext_type = ehdr->sadb_ext_type;
 469                 if (ext_len < sizeof(uint64_t) ||
 470                     ext_len > len ||
 471                     ext_type == SADB_EXT_RESERVED)
 472                         return -EINVAL;
 473
 474                 if (ext_type <= SADB_EXT_MAX) {
 475                         int min = (int) sadb_ext_min_len[ext_type];
 476                         if (ext_len < min)
 477                                 return -EINVAL;
 478                         if (ext_hdrs[ext_type-1] != NULL)
 479                                 return -EINVAL;
 480                         if (ext_type == SADB_EXT_ADDRESS_SRC ||
 481                             ext_type == SADB_EXT_ADDRESS_DST ||
 482                             ext_type == SADB_EXT_ADDRESS_PROXY ||
 483                             ext_type == SADB_X_EXT_NAT_T_OA) {
 484                                 if (verify_address_len(p))
 485                                         return -EINVAL;
 486                         }
 487                         if (ext_type == SADB_X_EXT_SEC_CTX) {
 488                                 if (verify_sec_ctx_len(p))
 489                                         return -EINVAL;
 490                         }
 491                         ext_hdrs[ext_type-1] = p;
 492                 }
 493                 p   += ext_len;
 494                 len -= ext_len;
 495         }
 496
 497         return 0;
 498 }
 499
 500 static uint16_t
 501 pfkey_satype2proto(uint8_t satype)
 502 {
 503         switch (satype) {
 504         case SADB_SATYPE_UNSPEC:
 505                 return IPSEC_PROTO_ANY;
 506         case SADB_SATYPE_AH:
 507                 return IPPROTO_AH;
 508         case SADB_SATYPE_ESP:
 509                 return IPPROTO_ESP;
 510         case SADB_X_SATYPE_IPCOMP:
 511                 return IPPROTO_COMP;
 512                 break;
 513         default:
 514                 return 0;
 515         }
 516         /* NOTREACHED */
 517 }
 518
 519 static uint8_t
 520 pfkey_proto2satype(uint16_t proto)
 521 {
 522         switch (proto) {
 523         case IPPROTO_AH:
 524                 return SADB_SATYPE_AH;
 525         case IPPROTO_ESP:
 526                 return SADB_SATYPE_ESP;
 527         case IPPROTO_COMP:
 528                 return SADB_X_SATYPE_IPCOMP;
 529                 break;
 530         default:
 531                 return 0;
 532         }
 533         /* NOTREACHED */
 534 }
 535
 536 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
 537  * say specifically 'just raw sockets' as we encode them as 255.
 538  */
 539
 540 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
 541 {
 542         return (proto == IPSEC_PROTO_ANY ? 0 : proto);
 543 }
 544
 545 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
 546 {
 547         return (proto ? proto : IPSEC_PROTO_ANY);
 548 }
 549
 550 static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
 551                                      xfrm_address_t *xaddr)
 552 {
 553         switch (((struct sockaddr*)(addr + 1))->sa_family) {
 554         case AF_INET:
 555                 xaddr->a4 =
 556                         ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
 557                 return AF_INET;
 558 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 559         case AF_INET6:
 560                 memcpy(xaddr->a6,
 561                        &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
 562                        sizeof(struct in6_addr));
 563                 return AF_INET6;
 564 #endif
 565         default:
 566                 return 0;
 567         }
 568         /* NOTREACHED */
 569 }
 570
 571 static struct  xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
 572 {
 573         struct sadb_sa *sa;
 574         struct sadb_address *addr;
 575         uint16_t proto;
 576         unsigned short family;
 577         xfrm_address_t *xaddr;
 578
 579         sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
 580         if (sa == NULL)
 581                 return NULL;
 582
 583         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
 584         if (proto == 0)
 585                 return NULL;
 586
 587         /* sadb_address_len should be checked by caller */
 588         addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
 589         if (addr == NULL)
 590                 return NULL;
 591
 592         family = ((struct sockaddr *)(addr + 1))->sa_family;
 593         switch (family) {
 594         case AF_INET:
 595                 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
 596                 break;
 597 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 598         case AF_INET6:
 599                 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
 600                 break;
 601 #endif
 602         default:
 603                 xaddr = NULL;
 604         }
 605
 606         if (!xaddr)
 607                 return NULL;
 608
 609         return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
 610 }
 611
 612 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
 613 static int
 614 pfkey_sockaddr_size(sa_family_t family)
 615 {
 616         switch (family) {
 617         case AF_INET:
 618                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
 619 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 620         case AF_INET6:
 621                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
 622 #endif
 623         default:
 624                 return 0;
 625         }
 626         /* NOTREACHED */
 627 }
 628
 629 static inline int pfkey_mode_from_xfrm(int mode)
 630 {
 631         switch(mode) {
 632         case XFRM_MODE_TRANSPORT:
 633                 return IPSEC_MODE_TRANSPORT;
 634         case XFRM_MODE_TUNNEL:
 635                 return IPSEC_MODE_TUNNEL;
 636         case XFRM_MODE_BEET:
 637                 return IPSEC_MODE_BEET;
 638         default:
 639                 return -1;
 640         }
 641 }
 642
 643 static inline int pfkey_mode_to_xfrm(int mode)
 644 {
 645         switch(mode) {
 646         case IPSEC_MODE_ANY:    /*XXX*/
 647         case IPSEC_MODE_TRANSPORT:
 648                 return XFRM_MODE_TRANSPORT;
 649         case IPSEC_MODE_TUNNEL:
 650                 return XFRM_MODE_TUNNEL;
 651         case IPSEC_MODE_BEET:
 652                 return XFRM_MODE_BEET;
 653         default:
 654                 return -1;
 655         }
 656 }
 657
 658 static struct sk_buff *__pfkey_xfrm_state2msg(struct xfrm_state *x,
 659                                               int add_keys, int hsc)
 660 {
 661         struct sk_buff *skb;
 662         struct sadb_msg *hdr;
 663         struct sadb_sa *sa;
 664         struct sadb_lifetime *lifetime;
 665         struct sadb_address *addr;
 666         struct sadb_key *key;
 667         struct sadb_x_sa2 *sa2;
 668         struct sockaddr_in *sin;
 669         struct sadb_x_sec_ctx *sec_ctx;
 670         struct xfrm_sec_ctx *xfrm_ctx;
 671         int ctx_size = 0;
 672 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 673         struct sockaddr_in6 *sin6;
 674 #endif
 675         int size;
 676         int auth_key_size = 0;
 677         int encrypt_key_size = 0;
 678         int sockaddr_size;
 679         struct xfrm_encap_tmpl *natt = NULL;
 680         int mode;
 681
 682         /* address family check */
 683         sockaddr_size = pfkey_sockaddr_size(x->props.family);
 684         if (!sockaddr_size)
 685                 return ERR_PTR(-EINVAL);
 686
 687         /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
 688            key(AE), (identity(SD),) (sensitivity)> */
 689         size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
 690                 sizeof(struct sadb_lifetime) +
 691                 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
 692                 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
 693                         sizeof(struct sadb_address)*2 +
 694                                 sockaddr_size*2 +
 695                                         sizeof(struct sadb_x_sa2);
 696
 697         if ((xfrm_ctx = x->security)) {
 698                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
 699                 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
 700         }
 701
 702         /* identity & sensitivity */
 703
 704         if ((x->props.family == AF_INET &&
 705              x->sel.saddr.a4 != x->props.saddr.a4)
 706 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 707             || (x->props.family == AF_INET6 &&
 708                 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
 709 #endif
 710                 )
 711                 size += sizeof(struct sadb_address) + sockaddr_size;
 712
 713         if (add_keys) {
 714                 if (x->aalg && x->aalg->alg_key_len) {
 715                         auth_key_size =
 716                                 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
 717                         size += sizeof(struct sadb_key) + auth_key_size;
 718                 }
 719                 if (x->ealg && x->ealg->alg_key_len) {
 720                         encrypt_key_size =
 721                                 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
 722                         size += sizeof(struct sadb_key) + encrypt_key_size;
 723                 }
 724         }
 725         if (x->encap)
 726                 natt = x->encap;
 727
 728         if (natt && natt->encap_type) {
 729                 size += sizeof(struct sadb_x_nat_t_type);
 730                 size += sizeof(struct sadb_x_nat_t_port);
 731                 size += sizeof(struct sadb_x_nat_t_port);
 732         }
 733
 734         skb =  alloc_skb(size + 16, GFP_ATOMIC);
 735         if (skb == NULL)
 736                 return ERR_PTR(-ENOBUFS);
 737
 738         /* call should fill header later */
 739         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
 740         memset(hdr, 0, size);   /* XXX do we need this ? */
 741         hdr->sadb_msg_len = size / sizeof(uint64_t);
 742
 743         /* sa */
 744         sa = (struct sadb_sa *)  skb_put(skb, sizeof(struct sadb_sa));
 745         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
 746         sa->sadb_sa_exttype = SADB_EXT_SA;
 747         sa->sadb_sa_spi = x->id.spi;
 748         sa->sadb_sa_replay = x->props.replay_window;
 749         switch (x->km.state) {
 750         case XFRM_STATE_VALID:
 751                 sa->sadb_sa_state = x->km.dying ?
 752                         SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
 753                 break;
 754         case XFRM_STATE_ACQ:
 755                 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
 756                 break;
 757         default:
 758                 sa->sadb_sa_state = SADB_SASTATE_DEAD;
 759                 break;
 760         }
 761         sa->sadb_sa_auth = 0;
 762         if (x->aalg) {
 763                 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
 764                 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
 765         }
 766         sa->sadb_sa_encrypt = 0;
 767         BUG_ON(x->ealg && x->calg);
 768         if (x->ealg) {
 769                 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
 770                 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
 771         }
 772         /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
 773         if (x->calg) {
 774                 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
 775                 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
 776         }
 777
 778         sa->sadb_sa_flags = 0;
 779         if (x->props.flags & XFRM_STATE_NOECN)
 780                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
 781         if (x->props.flags & XFRM_STATE_DECAP_DSCP)
 782                 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
 783         if (x->props.flags & XFRM_STATE_NOPMTUDISC)
 784                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
 785
 786         /* hard time */
 787         if (hsc & 2) {
 788                 lifetime = (struct sadb_lifetime *)  skb_put(skb,
 789                                                              sizeof(struct sadb_lifetime));
 790                 lifetime->sadb_lifetime_len =
 791                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 792                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
 793                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.hard_packet_limit);
 794                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
 795                 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
 796                 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
 797         }
 798         /* soft time */
 799         if (hsc & 1) {
 800                 lifetime = (struct sadb_lifetime *)  skb_put(skb,
 801                                                              sizeof(struct sadb_lifetime));
 802                 lifetime->sadb_lifetime_len =
 803                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 804                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
 805                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.soft_packet_limit);
 806                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
 807                 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
 808                 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
 809         }
 810         /* current time */
 811         lifetime = (struct sadb_lifetime *)  skb_put(skb,
 812                                                      sizeof(struct sadb_lifetime));
 813         lifetime->sadb_lifetime_len =
 814                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 815         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
 816         lifetime->sadb_lifetime_allocations = x->curlft.packets;
 817         lifetime->sadb_lifetime_bytes = x->curlft.bytes;
 818         lifetime->sadb_lifetime_addtime = x->curlft.add_time;
 819         lifetime->sadb_lifetime_usetime = x->curlft.use_time;
 820         /* src address */
 821         addr = (struct sadb_address*) skb_put(skb,
 822                                               sizeof(struct sadb_address)+sockaddr_size);
 823         addr->sadb_address_len =
 824                 (sizeof(struct sadb_address)+sockaddr_size)/
 825                         sizeof(uint64_t);
 826         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
 827         /* "if the ports are non-zero, then the sadb_address_proto field,
 828            normally zero, MUST be filled in with the transport
 829            protocol's number." - RFC2367 */
 830         addr->sadb_address_proto = 0;
 831         addr->sadb_address_reserved = 0;
 832         if (x->props.family == AF_INET) {
 833                 addr->sadb_address_prefixlen = 32;
 834
 835                 sin = (struct sockaddr_in *) (addr + 1);
 836                 sin->sin_family = AF_INET;
 837                 sin->sin_addr.s_addr = x->props.saddr.a4;
 838                 sin->sin_port = 0;
 839                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
 840         }
 841 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 842         else if (x->props.family == AF_INET6) {
 843                 addr->sadb_address_prefixlen = 128;
 844
 845                 sin6 = (struct sockaddr_in6 *) (addr + 1);
 846                 sin6->sin6_family = AF_INET6;
 847                 sin6->sin6_port = 0;
 848                 sin6->sin6_flowinfo = 0;
 849                 memcpy(&sin6->sin6_addr, x->props.saddr.a6,
 850                        sizeof(struct in6_addr));
 851                 sin6->sin6_scope_id = 0;
 852         }
 853 #endif
 854         else
 855                 BUG();
 856
 857         /* dst address */
 858         addr = (struct sadb_address*) skb_put(skb,
 859                                               sizeof(struct sadb_address)+sockaddr_size);
 860         addr->sadb_address_len =
 861                 (sizeof(struct sadb_address)+sockaddr_size)/
 862                         sizeof(uint64_t);
 863         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
 864         addr->sadb_address_proto = 0;
 865         addr->sadb_address_prefixlen = 32; /* XXX */
 866         addr->sadb_address_reserved = 0;
 867         if (x->props.family == AF_INET) {
 868                 sin = (struct sockaddr_in *) (addr + 1);
 869                 sin->sin_family = AF_INET;
 870                 sin->sin_addr.s_addr = x->id.daddr.a4;
 871                 sin->sin_port = 0;
 872                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
 873
 874                 if (x->sel.saddr.a4 != x->props.saddr.a4) {
 875                         addr = (struct sadb_address*) skb_put(skb,
 876                                 sizeof(struct sadb_address)+sockaddr_size);
 877                         addr->sadb_address_len =
 878                                 (sizeof(struct sadb_address)+sockaddr_size)/
 879                                 sizeof(uint64_t);
 880                         addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
 881                         addr->sadb_address_proto =
 882                                 pfkey_proto_from_xfrm(x->sel.proto);
 883                         addr->sadb_address_prefixlen = x->sel.prefixlen_s;
 884                         addr->sadb_address_reserved = 0;
 885
 886                         sin = (struct sockaddr_in *) (addr + 1);
 887                         sin->sin_family = AF_INET;
 888                         sin->sin_addr.s_addr = x->sel.saddr.a4;
 889                         sin->sin_port = x->sel.sport;
 890                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
 891                 }
 892         }
 893 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 894         else if (x->props.family == AF_INET6) {
 895                 addr->sadb_address_prefixlen = 128;
 896
 897                 sin6 = (struct sockaddr_in6 *) (addr + 1);
 898                 sin6->sin6_family = AF_INET6;
 899                 sin6->sin6_port = 0;
 900                 sin6->sin6_flowinfo = 0;
 901                 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
 902                 sin6->sin6_scope_id = 0;
 903
 904                 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
 905                             sizeof(struct in6_addr))) {
 906                         addr = (struct sadb_address *) skb_put(skb,
 907                                 sizeof(struct sadb_address)+sockaddr_size);
 908                         addr->sadb_address_len =
 909                                 (sizeof(struct sadb_address)+sockaddr_size)/
 910                                 sizeof(uint64_t);
 911                         addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
 912                         addr->sadb_address_proto =
 913                                 pfkey_proto_from_xfrm(x->sel.proto);
 914                         addr->sadb_address_prefixlen = x->sel.prefixlen_s;
 915                         addr->sadb_address_reserved = 0;
 916
 917                         sin6 = (struct sockaddr_in6 *) (addr + 1);
 918                         sin6->sin6_family = AF_INET6;
 919                         sin6->sin6_port = x->sel.sport;
 920                         sin6->sin6_flowinfo = 0;
 921                         memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
 922                                sizeof(struct in6_addr));
 923                         sin6->sin6_scope_id = 0;
 924                 }
 925         }
 926 #endif
 927         else
 928                 BUG();
 929
 930         /* auth key */
 931         if (add_keys && auth_key_size) {
 932                 key = (struct sadb_key *) skb_put(skb,
 933                                                   sizeof(struct sadb_key)+auth_key_size);
 934                 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
 935                         sizeof(uint64_t);
 936                 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
 937                 key->sadb_key_bits = x->aalg->alg_key_len;
 938                 key->sadb_key_reserved = 0;
 939                 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
 940         }
 941         /* encrypt key */
 942         if (add_keys && encrypt_key_size) {
 943                 key = (struct sadb_key *) skb_put(skb,
 944                                                   sizeof(struct sadb_key)+encrypt_key_size);
 945                 key->sadb_key_len = (sizeof(struct sadb_key) +
 946                                      encrypt_key_size) / sizeof(uint64_t);
 947                 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
 948                 key->sadb_key_bits = x->ealg->alg_key_len;
 949                 key->sadb_key_reserved = 0;
 950                 memcpy(key + 1, x->ealg->alg_key,
 951                        (x->ealg->alg_key_len+7)/8);
 952         }
 953
 954         /* sa */
 955         sa2 = (struct sadb_x_sa2 *)  skb_put(skb, sizeof(struct sadb_x_sa2));
 956         sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
 957         sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
 958         if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
 959                 kfree_skb(skb);
 960                 return ERR_PTR(-EINVAL);
 961         }
 962         sa2->sadb_x_sa2_mode = mode;
 963         sa2->sadb_x_sa2_reserved1 = 0;
 964         sa2->sadb_x_sa2_reserved2 = 0;
 965         sa2->sadb_x_sa2_sequence = 0;
 966         sa2->sadb_x_sa2_reqid = x->props.reqid;
 967
 968         if (natt && natt->encap_type) {
 969                 struct sadb_x_nat_t_type *n_type;
 970                 struct sadb_x_nat_t_port *n_port;
 971
 972                 /* type */
 973                 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
 974                 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
 975                 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
 976                 n_type->sadb_x_nat_t_type_type = natt->encap_type;
 977                 n_type->sadb_x_nat_t_type_reserved[0] = 0;
 978                 n_type->sadb_x_nat_t_type_reserved[1] = 0;
 979                 n_type->sadb_x_nat_t_type_reserved[2] = 0;
 980
 981                 /* source port */
 982                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
 983                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
 984                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
 985                 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
 986                 n_port->sadb_x_nat_t_port_reserved = 0;
 987
 988                 /* dest port */
 989                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
 990                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
 991                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
 992                 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
 993                 n_port->sadb_x_nat_t_port_reserved = 0;
 994         }
 995
 996         /* security context */
 997         if (xfrm_ctx) {
 998                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
 999                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1000                 sec_ctx->sadb_x_sec_len =
1001                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1002                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1003                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1004                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1005                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1006                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1007                        xfrm_ctx->ctx_len);
1008         }
1009
1010         return skb;
1011 }
1012
1013
1014 static inline struct sk_buff *pfkey_xfrm_state2msg(struct xfrm_state *x)
1015 {
1016         struct sk_buff *skb;
1017
1018         skb = __pfkey_xfrm_state2msg(x, 1, 3);
1019
1020         return skb;
1021 }
1022
1023 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x,
1024                                                           int hsc)
1025 {
1026         return __pfkey_xfrm_state2msg(x, 0, hsc);
1027 }
1028
1029 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1030                                                 void **ext_hdrs)
1031 {
1032         struct xfrm_state *x;
1033         struct sadb_lifetime *lifetime;
1034         struct sadb_sa *sa;
1035         struct sadb_key *key;
1036         struct sadb_x_sec_ctx *sec_ctx;
1037         uint16_t proto;
1038         int err;
1039
1040
1041         sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1042         if (!sa ||
1043             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1044                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1045                 return ERR_PTR(-EINVAL);
1046         if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1047             !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1048                 return ERR_PTR(-EINVAL);
1049         if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1050             !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1051                 return ERR_PTR(-EINVAL);
1052         if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1053             !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1054                 return ERR_PTR(-EINVAL);
1055
1056         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1057         if (proto == 0)
1058                 return ERR_PTR(-EINVAL);
1059
1060         /* default error is no buffer space */
1061         err = -ENOBUFS;
1062
1063         /* RFC2367:
1064
1065    Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1066    SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1067    sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1068    Therefore, the sadb_sa_state field of all submitted SAs MUST be
1069    SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1070    not true.
1071
1072            However, KAME setkey always uses SADB_SASTATE_LARVAL.
1073            Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1074          */
1075         if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1076             (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1077              sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1078             sa->sadb_sa_encrypt > SADB_EALG_MAX)
1079                 return ERR_PTR(-EINVAL);
1080         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1081         if (key != NULL &&
1082             sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1083             ((key->sadb_key_bits+7) / 8 == 0 ||
1084              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1085                 return ERR_PTR(-EINVAL);
1086         key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1087         if (key != NULL &&
1088             sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1089             ((key->sadb_key_bits+7) / 8 == 0 ||
1090              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1091                 return ERR_PTR(-EINVAL);
1092
1093         x = xfrm_state_alloc();
1094         if (x == NULL)
1095                 return ERR_PTR(-ENOBUFS);
1096
1097         x->id.proto = proto;
1098         x->id.spi = sa->sadb_sa_spi;
1099         x->props.replay_window = sa->sadb_sa_replay;
1100         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1101                 x->props.flags |= XFRM_STATE_NOECN;
1102         if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1103                 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1104         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1105                 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1106
1107         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1108         if (lifetime != NULL) {
1109                 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1110                 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1111                 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1112                 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1113         }
1114         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1115         if (lifetime != NULL) {
1116                 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1117                 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1118                 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1119                 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1120         }
1121
1122         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1123         if (sec_ctx != NULL) {
1124                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1125
1126                 if (!uctx)
1127                         goto out;
1128
1129                 err = security_xfrm_state_alloc(x, uctx);
1130                 kfree(uctx);
1131
1132                 if (err)
1133                         goto out;
1134         }
1135
1136         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1137         if (sa->sadb_sa_auth) {
1138                 int keysize = 0;
1139                 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1140                 if (!a) {
1141                         err = -ENOSYS;
1142                         goto out;
1143                 }
1144                 if (key)
1145                         keysize = (key->sadb_key_bits + 7) / 8;
1146                 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1147                 if (!x->aalg)
1148                         goto out;
1149                 strcpy(x->aalg->alg_name, a->name);
1150                 x->aalg->alg_key_len = 0;
1151                 if (key) {
1152                         x->aalg->alg_key_len = key->sadb_key_bits;
1153                         memcpy(x->aalg->alg_key, key+1, keysize);
1154                 }
1155                 x->props.aalgo = sa->sadb_sa_auth;
1156                 /* x->algo.flags = sa->sadb_sa_flags; */
1157         }
1158         if (sa->sadb_sa_encrypt) {
1159                 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1160                         struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1161                         if (!a) {
1162                                 err = -ENOSYS;
1163                                 goto out;
1164                         }
1165                         x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1166                         if (!x->calg)
1167                                 goto out;
1168                         strcpy(x->calg->alg_name, a->name);
1169                         x->props.calgo = sa->sadb_sa_encrypt;
1170                 } else {
1171                         int keysize = 0;
1172                         struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1173                         if (!a) {
1174                                 err = -ENOSYS;
1175                                 goto out;
1176                         }
1177                         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1178                         if (key)
1179                                 keysize = (key->sadb_key_bits + 7) / 8;
1180                         x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1181                         if (!x->ealg)
1182                                 goto out;
1183                         strcpy(x->ealg->alg_name, a->name);
1184                         x->ealg->alg_key_len = 0;
1185                         if (key) {
1186                                 x->ealg->alg_key_len = key->sadb_key_bits;
1187                                 memcpy(x->ealg->alg_key, key+1, keysize);
1188                         }
1189                         x->props.ealgo = sa->sadb_sa_encrypt;
1190                 }
1191         }
1192         /* x->algo.flags = sa->sadb_sa_flags; */
1193
1194         x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1195                                                     &x->props.saddr);
1196         if (!x->props.family) {
1197                 err = -EAFNOSUPPORT;
1198                 goto out;
1199         }
1200         pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1201                                   &x->id.daddr);
1202
1203         if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1204                 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1205                 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1206                 if (mode < 0) {
1207                         err = -EINVAL;
1208                         goto out;
1209                 }
1210                 x->props.mode = mode;
1211                 x->props.reqid = sa2->sadb_x_sa2_reqid;
1212         }
1213
1214         if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1215                 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1216
1217                 /* Nobody uses this, but we try. */
1218                 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1219                 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1220         }
1221
1222         if (!x->sel.family)
1223                 x->sel.family = x->props.family;
1224
1225         if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1226                 struct sadb_x_nat_t_type* n_type;
1227                 struct xfrm_encap_tmpl *natt;
1228
1229                 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1230                 if (!x->encap)
1231                         goto out;
1232
1233                 natt = x->encap;
1234                 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1235                 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1236
1237                 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1238                         struct sadb_x_nat_t_port* n_port =
1239                                 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1240                         natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1241                 }
1242                 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1243                         struct sadb_x_nat_t_port* n_port =
1244                                 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1245                         natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1246                 }
1247         }
1248
1249         err = xfrm_init_state(x);
1250         if (err)
1251                 goto out;
1252
1253         x->km.seq = hdr->sadb_msg_seq;
1254         return x;
1255
1256 out:
1257         x->km.state = XFRM_STATE_DEAD;
1258         xfrm_state_put(x);
1259         return ERR_PTR(err);
1260 }
1261
1262 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1263 {
1264         return -EOPNOTSUPP;
1265 }
1266
1267 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1268 {
1269         struct sk_buff *resp_skb;
1270         struct sadb_x_sa2 *sa2;
1271         struct sadb_address *saddr, *daddr;
1272         struct sadb_msg *out_hdr;
1273         struct sadb_spirange *range;
1274         struct xfrm_state *x = NULL;
1275         int mode;
1276         int err;
1277         u32 min_spi, max_spi;
1278         u32 reqid;
1279         u8 proto;
1280         unsigned short family;
1281         xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1282
1283         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1284                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1285                 return -EINVAL;
1286
1287         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1288         if (proto == 0)
1289                 return -EINVAL;
1290
1291         if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1292                 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1293                 if (mode < 0)
1294                         return -EINVAL;
1295                 reqid = sa2->sadb_x_sa2_reqid;
1296         } else {
1297                 mode = 0;
1298                 reqid = 0;
1299         }
1300
1301         saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1302         daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1303
1304         family = ((struct sockaddr *)(saddr + 1))->sa_family;
1305         switch (family) {
1306         case AF_INET:
1307                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1308                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1309                 break;
1310 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1311         case AF_INET6:
1312                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1313                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1314                 break;
1315 #endif
1316         }
1317
1318         if (hdr->sadb_msg_seq) {
1319                 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1320                 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1321                         xfrm_state_put(x);
1322                         x = NULL;
1323                 }
1324         }
1325
1326         if (!x)
1327                 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1328
1329         if (x == NULL)
1330                 return -ENOENT;
1331
1332         min_spi = 0x100;
1333         max_spi = 0x0fffffff;
1334
1335         range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1336         if (range) {
1337                 min_spi = range->sadb_spirange_min;
1338                 max_spi = range->sadb_spirange_max;
1339         }
1340
1341         err = xfrm_alloc_spi(x, min_spi, max_spi);
1342         resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1343
1344         if (IS_ERR(resp_skb)) {
1345                 xfrm_state_put(x);
1346                 return  PTR_ERR(resp_skb);
1347         }
1348
1349         out_hdr = (struct sadb_msg *) resp_skb->data;
1350         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1351         out_hdr->sadb_msg_type = SADB_GETSPI;
1352         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1353         out_hdr->sadb_msg_errno = 0;
1354         out_hdr->sadb_msg_reserved = 0;
1355         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1356         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1357
1358         xfrm_state_put(x);
1359
1360         pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1361
1362         return 0;
1363 }
1364
1365 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1366 {
1367         struct xfrm_state *x;
1368
1369         if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1370                 return -EOPNOTSUPP;
1371
1372         if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1373                 return 0;
1374
1375         x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1376         if (x == NULL)
1377                 return 0;
1378
1379         spin_lock_bh(&x->lock);
1380         if (x->km.state == XFRM_STATE_ACQ) {
1381                 x->km.state = XFRM_STATE_ERROR;
1382                 wake_up(&km_waitq);
1383         }
1384         spin_unlock_bh(&x->lock);
1385         xfrm_state_put(x);
1386         return 0;
1387 }
1388
1389 static inline int event2poltype(int event)
1390 {
1391         switch (event) {
1392         case XFRM_MSG_DELPOLICY:
1393                 return SADB_X_SPDDELETE;
1394         case XFRM_MSG_NEWPOLICY:
1395                 return SADB_X_SPDADD;
1396         case XFRM_MSG_UPDPOLICY:
1397                 return SADB_X_SPDUPDATE;
1398         case XFRM_MSG_POLEXPIRE:
1399         //      return SADB_X_SPDEXPIRE;
1400         default:
1401                 printk("pfkey: Unknown policy event %d\n", event);
1402                 break;
1403         }
1404
1405         return 0;
1406 }
1407
1408 static inline int event2keytype(int event)
1409 {
1410         switch (event) {
1411         case XFRM_MSG_DELSA:
1412                 return SADB_DELETE;
1413         case XFRM_MSG_NEWSA:
1414                 return SADB_ADD;
1415         case XFRM_MSG_UPDSA:
1416                 return SADB_UPDATE;
1417         case XFRM_MSG_EXPIRE:
1418                 return SADB_EXPIRE;
1419         default:
1420                 printk("pfkey: Unknown SA event %d\n", event);
1421                 break;
1422         }
1423
1424         return 0;
1425 }
1426
1427 /* ADD/UPD/DEL */
1428 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1429 {
1430         struct sk_buff *skb;
1431         struct sadb_msg *hdr;
1432
1433         skb = pfkey_xfrm_state2msg(x);
1434
1435         if (IS_ERR(skb))
1436                 return PTR_ERR(skb);
1437
1438         hdr = (struct sadb_msg *) skb->data;
1439         hdr->sadb_msg_version = PF_KEY_V2;
1440         hdr->sadb_msg_type = event2keytype(c->event);
1441         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1442         hdr->sadb_msg_errno = 0;
1443         hdr->sadb_msg_reserved = 0;
1444         hdr->sadb_msg_seq = c->seq;
1445         hdr->sadb_msg_pid = c->pid;
1446
1447         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1448
1449         return 0;
1450 }
1451
1452 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1453 {
1454         struct xfrm_state *x;
1455         int err;
1456         struct km_event c;
1457
1458         x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1459         if (IS_ERR(x))
1460                 return PTR_ERR(x);
1461
1462         xfrm_state_hold(x);
1463         if (hdr->sadb_msg_type == SADB_ADD)
1464                 err = xfrm_state_add(x);
1465         else
1466                 err = xfrm_state_update(x);
1467
1468         xfrm_audit_state_add(x, err ? 0 : 1,
1469                              audit_get_loginuid(current->audit_context), 0);
1470
1471         if (err < 0) {
1472                 x->km.state = XFRM_STATE_DEAD;
1473                 __xfrm_state_put(x);
1474                 goto out;
1475         }
1476
1477         if (hdr->sadb_msg_type == SADB_ADD)
1478                 c.event = XFRM_MSG_NEWSA;
1479         else
1480                 c.event = XFRM_MSG_UPDSA;
1481         c.seq = hdr->sadb_msg_seq;
1482         c.pid = hdr->sadb_msg_pid;
1483         km_state_notify(x, &c);
1484 out:
1485         xfrm_state_put(x);
1486         return err;
1487 }
1488
1489 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1490 {
1491         struct xfrm_state *x;
1492         struct km_event c;
1493         int err;
1494
1495         if (!ext_hdrs[SADB_EXT_SA-1] ||
1496             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1497                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1498                 return -EINVAL;
1499
1500         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1501         if (x == NULL)
1502                 return -ESRCH;
1503
1504         if ((err = security_xfrm_state_delete(x)))
1505                 goto out;
1506
1507         if (xfrm_state_kern(x)) {
1508                 err = -EPERM;
1509                 goto out;
1510         }
1511
1512         err = xfrm_state_delete(x);
1513
1514         if (err < 0)
1515                 goto out;
1516
1517         c.seq = hdr->sadb_msg_seq;
1518         c.pid = hdr->sadb_msg_pid;
1519         c.event = XFRM_MSG_DELSA;
1520         km_state_notify(x, &c);
1521 out:
1522         xfrm_audit_state_delete(x, err ? 0 : 1,
1523                                audit_get_loginuid(current->audit_context), 0);
1524         xfrm_state_put(x);
1525
1526         return err;
1527 }
1528
1529 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1530 {
1531         __u8 proto;
1532         struct sk_buff *out_skb;
1533         struct sadb_msg *out_hdr;
1534         struct xfrm_state *x;
1535
1536         if (!ext_hdrs[SADB_EXT_SA-1] ||
1537             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1538                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1539                 return -EINVAL;
1540
1541         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1542         if (x == NULL)
1543                 return -ESRCH;
1544
1545         out_skb = pfkey_xfrm_state2msg(x);
1546         proto = x->id.proto;
1547         xfrm_state_put(x);
1548         if (IS_ERR(out_skb))
1549                 return  PTR_ERR(out_skb);
1550
1551         out_hdr = (struct sadb_msg *) out_skb->data;
1552         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1553         out_hdr->sadb_msg_type = SADB_GET;
1554         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1555         out_hdr->sadb_msg_errno = 0;
1556         out_hdr->sadb_msg_reserved = 0;
1557         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1558         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1559         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1560
1561         return 0;
1562 }
1563
1564 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1565                                               gfp_t allocation)
1566 {
1567         struct sk_buff *skb;
1568         struct sadb_msg *hdr;
1569         int len, auth_len, enc_len, i;
1570
1571         auth_len = xfrm_count_auth_supported();
1572         if (auth_len) {
1573                 auth_len *= sizeof(struct sadb_alg);
1574                 auth_len += sizeof(struct sadb_supported);
1575         }
1576
1577         enc_len = xfrm_count_enc_supported();
1578         if (enc_len) {
1579                 enc_len *= sizeof(struct sadb_alg);
1580                 enc_len += sizeof(struct sadb_supported);
1581         }
1582
1583         len = enc_len + auth_len + sizeof(struct sadb_msg);
1584
1585         skb = alloc_skb(len + 16, allocation);
1586         if (!skb)
1587                 goto out_put_algs;
1588
1589         hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1590         pfkey_hdr_dup(hdr, orig);
1591         hdr->sadb_msg_errno = 0;
1592         hdr->sadb_msg_len = len / sizeof(uint64_t);
1593
1594         if (auth_len) {
1595                 struct sadb_supported *sp;
1596                 struct sadb_alg *ap;
1597
1598                 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1599                 ap = (struct sadb_alg *) (sp + 1);
1600
1601                 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1602                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1603
1604                 for (i = 0; ; i++) {
1605                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1606                         if (!aalg)
1607                                 break;
1608                         if (aalg->available)
1609                                 *ap++ = aalg->desc;
1610                 }
1611         }
1612
1613         if (enc_len) {
1614                 struct sadb_supported *sp;
1615                 struct sadb_alg *ap;
1616
1617                 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1618                 ap = (struct sadb_alg *) (sp + 1);
1619
1620                 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1621                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1622
1623                 for (i = 0; ; i++) {
1624                         struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1625                         if (!ealg)
1626                                 break;
1627                         if (ealg->available)
1628                                 *ap++ = ealg->desc;
1629                 }
1630         }
1631
1632 out_put_algs:
1633         return skb;
1634 }
1635
1636 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1637 {
1638         struct pfkey_sock *pfk = pfkey_sk(sk);
1639         struct sk_buff *supp_skb;
1640
1641         if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1642                 return -EINVAL;
1643
1644         if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1645                 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1646                         return -EEXIST;
1647                 pfk->registered |= (1<<hdr->sadb_msg_satype);
1648         }
1649
1650         xfrm_probe_algs();
1651
1652         supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1653         if (!supp_skb) {
1654                 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1655                         pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1656
1657                 return -ENOBUFS;
1658         }
1659
1660         pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1661
1662         return 0;
1663 }
1664
1665 static int key_notify_sa_flush(struct km_event *c)
1666 {
1667         struct sk_buff *skb;
1668         struct sadb_msg *hdr;
1669
1670         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1671         if (!skb)
1672                 return -ENOBUFS;
1673         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1674         hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1675         hdr->sadb_msg_type = SADB_FLUSH;
1676         hdr->sadb_msg_seq = c->seq;
1677         hdr->sadb_msg_pid = c->pid;
1678         hdr->sadb_msg_version = PF_KEY_V2;
1679         hdr->sadb_msg_errno = (uint8_t) 0;
1680         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1681
1682         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1683
1684         return 0;
1685 }
1686
1687 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1688 {
1689         unsigned proto;
1690         struct km_event c;
1691         struct xfrm_audit audit_info;
1692         int err;
1693
1694         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1695         if (proto == 0)
1696                 return -EINVAL;
1697
1698         audit_info.loginuid = audit_get_loginuid(current->audit_context);
1699         audit_info.secid = 0;
1700         err = xfrm_state_flush(proto, &audit_info);
1701         if (err)
1702                 return err;
1703         c.data.proto = proto;
1704         c.seq = hdr->sadb_msg_seq;
1705         c.pid = hdr->sadb_msg_pid;
1706         c.event = XFRM_MSG_FLUSHSA;
1707         km_state_notify(NULL, &c);
1708
1709         return 0;
1710 }
1711
1712 struct pfkey_dump_data
1713 {
1714         struct sk_buff *skb;
1715         struct sadb_msg *hdr;
1716         struct sock *sk;
1717 };
1718
1719 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1720 {
1721         struct pfkey_dump_data *data = ptr;
1722         struct sk_buff *out_skb;
1723         struct sadb_msg *out_hdr;
1724
1725         out_skb = pfkey_xfrm_state2msg(x);
1726         if (IS_ERR(out_skb))
1727                 return PTR_ERR(out_skb);
1728
1729         out_hdr = (struct sadb_msg *) out_skb->data;
1730         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1731         out_hdr->sadb_msg_type = SADB_DUMP;
1732         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1733         out_hdr->sadb_msg_errno = 0;
1734         out_hdr->sadb_msg_reserved = 0;
1735         out_hdr->sadb_msg_seq = count;
1736         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1737         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1738         return 0;
1739 }
1740
1741 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1742 {
1743         u8 proto;
1744         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1745
1746         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1747         if (proto == 0)
1748                 return -EINVAL;
1749
1750         return xfrm_state_walk(proto, dump_sa, &data);
1751 }
1752
1753 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1754 {
1755         struct pfkey_sock *pfk = pfkey_sk(sk);
1756         int satype = hdr->sadb_msg_satype;
1757
1758         if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1759                 /* XXX we mangle packet... */
1760                 hdr->sadb_msg_errno = 0;
1761                 if (satype != 0 && satype != 1)
1762                         return -EINVAL;
1763                 pfk->promisc = satype;
1764         }
1765         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1766         return 0;
1767 }
1768
1769 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1770 {
1771         int i;
1772         u32 reqid = *(u32*)ptr;
1773
1774         for (i=0; i<xp->xfrm_nr; i++) {
1775                 if (xp->xfrm_vec[i].reqid == reqid)
1776                         return -EEXIST;
1777         }
1778         return 0;
1779 }
1780
1781 static u32 gen_reqid(void)
1782 {
1783         u32 start;
1784         static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1785
1786         start = reqid;
1787         do {
1788                 ++reqid;
1789                 if (reqid == 0)
1790                         reqid = IPSEC_MANUAL_REQID_MAX+1;
1791                 if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid,
1792                                      (void*)&reqid) != -EEXIST)
1793                         return reqid;
1794         } while (reqid != start);
1795         return 0;
1796 }
1797
1798 static int
1799 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1800 {
1801         struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1802         struct sockaddr_in *sin;
1803 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1804         struct sockaddr_in6 *sin6;
1805 #endif
1806         int mode;
1807
1808         if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1809                 return -ELOOP;
1810
1811         if (rq->sadb_x_ipsecrequest_mode == 0)
1812                 return -EINVAL;
1813
1814         t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1815         if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1816                 return -EINVAL;
1817         t->mode = mode;
1818         if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1819                 t->optional = 1;
1820         else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1821                 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1822                 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1823                         t->reqid = 0;
1824                 if (!t->reqid && !(t->reqid = gen_reqid()))
1825                         return -ENOBUFS;
1826         }
1827
1828         /* addresses present only in tunnel mode */
1829         if (t->mode == XFRM_MODE_TUNNEL) {
1830                 struct sockaddr *sa;
1831                 sa = (struct sockaddr *)(rq+1);
1832                 switch(sa->sa_family) {
1833                 case AF_INET:
1834                         sin = (struct sockaddr_in*)sa;
1835                         t->saddr.a4 = sin->sin_addr.s_addr;
1836                         sin++;
1837                         if (sin->sin_family != AF_INET)
1838                                 return -EINVAL;
1839                         t->id.daddr.a4 = sin->sin_addr.s_addr;
1840                         break;
1841 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1842                 case AF_INET6:
1843                         sin6 = (struct sockaddr_in6*)sa;
1844                         memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1845                         sin6++;
1846                         if (sin6->sin6_family != AF_INET6)
1847                                 return -EINVAL;
1848                         memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1849                         break;
1850 #endif
1851                 default:
1852                         return -EINVAL;
1853                 }
1854                 t->encap_family = sa->sa_family;
1855         } else
1856                 t->encap_family = xp->family;
1857
1858         /* No way to set this via kame pfkey */
1859         t->aalgos = t->ealgos = t->calgos = ~0;
1860         xp->xfrm_nr++;
1861         return 0;
1862 }
1863
1864 static int
1865 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1866 {
1867         int err;
1868         int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1869         struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1870
1871         while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1872                 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1873                         return err;
1874                 len -= rq->sadb_x_ipsecrequest_len;
1875                 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1876         }
1877         return 0;
1878 }
1879
1880 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1881 {
1882   struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1883
1884         if (xfrm_ctx) {
1885                 int len = sizeof(struct sadb_x_sec_ctx);
1886                 len += xfrm_ctx->ctx_len;
1887                 return PFKEY_ALIGN8(len);
1888         }
1889         return 0;
1890 }
1891
1892 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1893 {
1894         struct xfrm_tmpl *t;
1895         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1896         int socklen = 0;
1897         int i;
1898
1899         for (i=0; i<xp->xfrm_nr; i++) {
1900                 t = xp->xfrm_vec + i;
1901                 socklen += (t->encap_family == AF_INET ?
1902                             sizeof(struct sockaddr_in) :
1903                             sizeof(struct sockaddr_in6));
1904         }
1905
1906         return sizeof(struct sadb_msg) +
1907                 (sizeof(struct sadb_lifetime) * 3) +
1908                 (sizeof(struct sadb_address) * 2) +
1909                 (sockaddr_size * 2) +
1910                 sizeof(struct sadb_x_policy) +
1911                 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1912                 (socklen * 2) +
1913                 pfkey_xfrm_policy2sec_ctx_size(xp);
1914 }
1915
1916 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1917 {
1918         struct sk_buff *skb;
1919         int size;
1920
1921         size = pfkey_xfrm_policy2msg_size(xp);
1922
1923         skb =  alloc_skb(size + 16, GFP_ATOMIC);
1924         if (skb == NULL)
1925                 return ERR_PTR(-ENOBUFS);
1926
1927         return skb;
1928 }
1929
1930 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1931 {
1932         struct sadb_msg *hdr;
1933         struct sadb_address *addr;
1934         struct sadb_lifetime *lifetime;
1935         struct sadb_x_policy *pol;
1936         struct sockaddr_in   *sin;
1937         struct sadb_x_sec_ctx *sec_ctx;
1938         struct xfrm_sec_ctx *xfrm_ctx;
1939 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1940         struct sockaddr_in6  *sin6;
1941 #endif
1942         int i;
1943         int size;
1944         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1945         int socklen = (xp->family == AF_INET ?
1946                        sizeof(struct sockaddr_in) :
1947                        sizeof(struct sockaddr_in6));
1948
1949         size = pfkey_xfrm_policy2msg_size(xp);
1950
1951         /* call should fill header later */
1952         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1953         memset(hdr, 0, size);   /* XXX do we need this ? */
1954
1955         /* src address */
1956         addr = (struct sadb_address*) skb_put(skb,
1957                                               sizeof(struct sadb_address)+sockaddr_size);
1958         addr->sadb_address_len =
1959                 (sizeof(struct sadb_address)+sockaddr_size)/
1960                         sizeof(uint64_t);
1961         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1962         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1963         addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1964         addr->sadb_address_reserved = 0;
1965         /* src address */
1966         if (xp->family == AF_INET) {
1967                 sin = (struct sockaddr_in *) (addr + 1);
1968                 sin->sin_family = AF_INET;
1969                 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1970                 sin->sin_port = xp->selector.sport;
1971                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1972         }
1973 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1974         else if (xp->family == AF_INET6) {
1975                 sin6 = (struct sockaddr_in6 *) (addr + 1);
1976                 sin6->sin6_family = AF_INET6;
1977                 sin6->sin6_port = xp->selector.sport;
1978                 sin6->sin6_flowinfo = 0;
1979                 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1980                        sizeof(struct in6_addr));
1981                 sin6->sin6_scope_id = 0;
1982         }
1983 #endif
1984         else
1985                 BUG();
1986
1987         /* dst address */
1988         addr = (struct sadb_address*) skb_put(skb,
1989                                               sizeof(struct sadb_address)+sockaddr_size);
1990         addr->sadb_address_len =
1991                 (sizeof(struct sadb_address)+sockaddr_size)/
1992                         sizeof(uint64_t);
1993         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1994         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1995         addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1996         addr->sadb_address_reserved = 0;
1997         if (xp->family == AF_INET) {
1998                 sin = (struct sockaddr_in *) (addr + 1);
1999                 sin->sin_family = AF_INET;
2000                 sin->sin_addr.s_addr = xp->selector.daddr.a4;
2001                 sin->sin_port = xp->selector.dport;
2002                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2003         }
2004 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2005         else if (xp->family == AF_INET6) {
2006                 sin6 = (struct sockaddr_in6 *) (addr + 1);
2007                 sin6->sin6_family = AF_INET6;
2008                 sin6->sin6_port = xp->selector.dport;
2009                 sin6->sin6_flowinfo = 0;
2010                 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2011                        sizeof(struct in6_addr));
2012                 sin6->sin6_scope_id = 0;
2013         }
2014 #endif
2015         else
2016                 BUG();
2017
2018         /* hard time */
2019         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2020                                                      sizeof(struct sadb_lifetime));
2021         lifetime->sadb_lifetime_len =
2022                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2023         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2024         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.hard_packet_limit);
2025         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2026         lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2027         lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2028         /* soft time */
2029         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2030                                                      sizeof(struct sadb_lifetime));
2031         lifetime->sadb_lifetime_len =
2032                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2033         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2034         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.soft_packet_limit);
2035         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2036         lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2037         lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2038         /* current time */
2039         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2040                                                      sizeof(struct sadb_lifetime));
2041         lifetime->sadb_lifetime_len =
2042                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2043         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2044         lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2045         lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2046         lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2047         lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2048
2049         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
2050         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2051         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2052         pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2053         if (xp->action == XFRM_POLICY_ALLOW) {
2054                 if (xp->xfrm_nr)
2055                         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2056                 else
2057                         pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2058         }
2059         pol->sadb_x_policy_dir = dir+1;
2060         pol->sadb_x_policy_id = xp->index;
2061         pol->sadb_x_policy_priority = xp->priority;
2062
2063         for (i=0; i<xp->xfrm_nr; i++) {
2064                 struct sadb_x_ipsecrequest *rq;
2065                 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2066                 int req_size;
2067                 int mode;
2068
2069                 req_size = sizeof(struct sadb_x_ipsecrequest);
2070                 if (t->mode == XFRM_MODE_TUNNEL)
2071                         req_size += ((t->encap_family == AF_INET ?
2072                                      sizeof(struct sockaddr_in) :
2073                                      sizeof(struct sockaddr_in6)) * 2);
2074                 else
2075                         size -= 2*socklen;
2076                 rq = (void*)skb_put(skb, req_size);
2077                 pol->sadb_x_policy_len += req_size/8;
2078                 memset(rq, 0, sizeof(*rq));
2079                 rq->sadb_x_ipsecrequest_len = req_size;
2080                 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2081                 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2082                         return -EINVAL;
2083                 rq->sadb_x_ipsecrequest_mode = mode;
2084                 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2085                 if (t->reqid)
2086                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2087                 if (t->optional)
2088                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2089                 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2090                 if (t->mode == XFRM_MODE_TUNNEL) {
2091                         switch (t->encap_family) {
2092                         case AF_INET:
2093                                 sin = (void*)(rq+1);
2094                                 sin->sin_family = AF_INET;
2095                                 sin->sin_addr.s_addr = t->saddr.a4;
2096                                 sin->sin_port = 0;
2097                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2098                                 sin++;
2099                                 sin->sin_family = AF_INET;
2100                                 sin->sin_addr.s_addr = t->id.daddr.a4;
2101                                 sin->sin_port = 0;
2102                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2103                                 break;
2104 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2105                         case AF_INET6:
2106                                 sin6 = (void*)(rq+1);
2107                                 sin6->sin6_family = AF_INET6;
2108                                 sin6->sin6_port = 0;
2109                                 sin6->sin6_flowinfo = 0;
2110                                 memcpy(&sin6->sin6_addr, t->saddr.a6,
2111                                        sizeof(struct in6_addr));
2112                                 sin6->sin6_scope_id = 0;
2113
2114                                 sin6++;
2115                                 sin6->sin6_family = AF_INET6;
2116                                 sin6->sin6_port = 0;
2117                                 sin6->sin6_flowinfo = 0;
2118                                 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2119                                        sizeof(struct in6_addr));
2120                                 sin6->sin6_scope_id = 0;
2121                                 break;
2122 #endif
2123                         default:
2124                                 break;
2125                         }
2126                 }
2127         }
2128
2129         /* security context */
2130         if ((xfrm_ctx = xp->security)) {
2131                 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2132
2133                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2134                 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2135                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2136                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2137                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2138                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2139                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2140                        xfrm_ctx->ctx_len);
2141         }
2142
2143         hdr->sadb_msg_len = size / sizeof(uint64_t);
2144         hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2145
2146         return 0;
2147 }
2148
2149 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2150 {
2151         struct sk_buff *out_skb;
2152         struct sadb_msg *out_hdr;
2153         int err;
2154
2155         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2156         if (IS_ERR(out_skb)) {
2157                 err = PTR_ERR(out_skb);
2158                 goto out;
2159         }
2160         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2161         if (err < 0)
2162                 return err;
2163
2164         out_hdr = (struct sadb_msg *) out_skb->data;
2165         out_hdr->sadb_msg_version = PF_KEY_V2;
2166
2167         if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2168                 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2169         else
2170                 out_hdr->sadb_msg_type = event2poltype(c->event);
2171         out_hdr->sadb_msg_errno = 0;
2172         out_hdr->sadb_msg_seq = c->seq;
2173         out_hdr->sadb_msg_pid = c->pid;
2174         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2175 out:
2176         return 0;
2177
2178 }
2179
2180 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2181 {
2182         int err = 0;
2183         struct sadb_lifetime *lifetime;
2184         struct sadb_address *sa;
2185         struct sadb_x_policy *pol;
2186         struct xfrm_policy *xp;
2187         struct km_event c;
2188         struct sadb_x_sec_ctx *sec_ctx;
2189
2190         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2191                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2192             !ext_hdrs[SADB_X_EXT_POLICY-1])
2193                 return -EINVAL;
2194
2195         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2196         if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2197                 return -EINVAL;
2198         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2199                 return -EINVAL;
2200
2201         xp = xfrm_policy_alloc(GFP_KERNEL);
2202         if (xp == NULL)
2203                 return -ENOBUFS;
2204
2205         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2206                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2207         xp->priority = pol->sadb_x_policy_priority;
2208
2209         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2210         xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2211         if (!xp->family) {
2212                 err = -EINVAL;
2213                 goto out;
2214         }
2215         xp->selector.family = xp->family;
2216         xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2217         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2218         xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2219         if (xp->selector.sport)
2220                 xp->selector.sport_mask = htons(0xffff);
2221
2222         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2223         pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2224         xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2225
2226         /* Amusing, we set this twice.  KAME apps appear to set same value
2227          * in both addresses.
2228          */
2229         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2230
2231         xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2232         if (xp->selector.dport)
2233                 xp->selector.dport_mask = htons(0xffff);
2234
2235         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2236         if (sec_ctx != NULL) {
2237                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2238
2239                 if (!uctx) {
2240                         err = -ENOBUFS;
2241                         goto out;
2242                 }
2243
2244                 err = security_xfrm_policy_alloc(xp, uctx);
2245                 kfree(uctx);
2246
2247                 if (err)
2248                         goto out;
2249         }
2250
2251         xp->lft.soft_byte_limit = XFRM_INF;
2252         xp->lft.hard_byte_limit = XFRM_INF;
2253         xp->lft.soft_packet_limit = XFRM_INF;
2254         xp->lft.hard_packet_limit = XFRM_INF;
2255         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2256                 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2257                 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2258                 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2259                 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2260         }
2261         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2262                 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2263                 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2264                 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2265                 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2266         }
2267         xp->xfrm_nr = 0;
2268         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2269             (err = parse_ipsecrequests(xp, pol)) < 0)
2270                 goto out;
2271
2272         err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2273                                  hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2274
2275         xfrm_audit_policy_add(xp, err ? 0 : 1,
2276                              audit_get_loginuid(current->audit_context), 0);
2277
2278         if (err)
2279                 goto out;
2280
2281         if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2282                 c.event = XFRM_MSG_UPDPOLICY;
2283         else
2284                 c.event = XFRM_MSG_NEWPOLICY;
2285
2286         c.seq = hdr->sadb_msg_seq;
2287         c.pid = hdr->sadb_msg_pid;
2288
2289         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2290         xfrm_pol_put(xp);
2291         return 0;
2292
2293 out:
2294         security_xfrm_policy_free(xp);
2295         kfree(xp);
2296         return err;
2297 }
2298
2299 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2300 {
2301         int err;
2302         struct sadb_address *sa;
2303         struct sadb_x_policy *pol;
2304         struct xfrm_policy *xp, tmp;
2305         struct xfrm_selector sel;
2306         struct km_event c;
2307         struct sadb_x_sec_ctx *sec_ctx;
2308
2309         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2310                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2311             !ext_hdrs[SADB_X_EXT_POLICY-1])
2312                 return -EINVAL;
2313
2314         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2315         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2316                 return -EINVAL;
2317
2318         memset(&sel, 0, sizeof(sel));
2319
2320         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2321         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2322         sel.prefixlen_s = sa->sadb_address_prefixlen;
2323         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2324         sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2325         if (sel.sport)
2326                 sel.sport_mask = htons(0xffff);
2327
2328         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2329         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2330         sel.prefixlen_d = sa->sadb_address_prefixlen;
2331         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2332         sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2333         if (sel.dport)
2334                 sel.dport_mask = htons(0xffff);
2335
2336         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2337         memset(&tmp, 0, sizeof(struct xfrm_policy));
2338
2339         if (sec_ctx != NULL) {
2340                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2341
2342                 if (!uctx)
2343                         return -ENOMEM;
2344
2345                 err = security_xfrm_policy_alloc(&tmp, uctx);
2346                 kfree(uctx);
2347
2348                 if (err)
2349                         return err;
2350         }
2351
2352         xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
2353                                    &sel, tmp.security, 1, &err);
2354         security_xfrm_policy_free(&tmp);
2355
2356         if (xp == NULL)
2357                 return -ENOENT;
2358
2359         xfrm_audit_policy_delete(xp, err ? 0 : 1,
2360                                 audit_get_loginuid(current->audit_context), 0);
2361
2362         if (err)
2363                 goto out;
2364
2365         c.seq = hdr->sadb_msg_seq;
2366         c.pid = hdr->sadb_msg_pid;
2367         c.event = XFRM_MSG_DELPOLICY;
2368         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2369
2370 out:
2371         xfrm_pol_put(xp);
2372         return err;
2373 }
2374
2375 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2376 {
2377         int err;
2378         struct sk_buff *out_skb;
2379         struct sadb_msg *out_hdr;
2380         err = 0;
2381
2382         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2383         if (IS_ERR(out_skb)) {
2384                 err =  PTR_ERR(out_skb);
2385                 goto out;
2386         }
2387         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2388         if (err < 0)
2389                 goto out;
2390
2391         out_hdr = (struct sadb_msg *) out_skb->data;
2392         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2393         out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2394         out_hdr->sadb_msg_satype = 0;
2395         out_hdr->sadb_msg_errno = 0;
2396         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2397         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2398         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2399         err = 0;
2400
2401 out:
2402         return err;
2403 }
2404
2405 #ifdef CONFIG_NET_KEY_MIGRATE
2406 static int pfkey_sockaddr_pair_size(sa_family_t family)
2407 {
2408         switch (family) {
2409         case AF_INET:
2410                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2411 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2412         case AF_INET6:
2413                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2414 #endif
2415         default:
2416                 return 0;
2417         }
2418         /* NOTREACHED */
2419 }
2420
2421 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2422                                xfrm_address_t *saddr, xfrm_address_t *daddr,
2423                                u16 *family)
2424 {
2425         struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2426         if (rq->sadb_x_ipsecrequest_len <
2427             pfkey_sockaddr_pair_size(sa->sa_family))
2428                 return -EINVAL;
2429
2430         switch (sa->sa_family) {
2431         case AF_INET:
2432                 {
2433                         struct sockaddr_in *sin;
2434                         sin = (struct sockaddr_in *)sa;
2435                         if ((sin+1)->sin_family != AF_INET)
2436                                 return -EINVAL;
2437                         memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2438                         sin++;
2439                         memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2440                         *family = AF_INET;
2441                         break;
2442                 }
2443 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2444         case AF_INET6:
2445                 {
2446                         struct sockaddr_in6 *sin6;
2447                         sin6 = (struct sockaddr_in6 *)sa;
2448                         if ((sin6+1)->sin6_family != AF_INET6)
2449                                 return -EINVAL;
2450                         memcpy(&saddr->a6, &sin6->sin6_addr,
2451                                sizeof(saddr->a6));
2452                         sin6++;
2453                         memcpy(&daddr->a6, &sin6->sin6_addr,
2454                                sizeof(daddr->a6));
2455                         *family = AF_INET6;
2456                         break;
2457                 }
2458 #endif
2459         default:
2460                 return -EINVAL;
2461         }
2462
2463         return 0;
2464 }
2465
2466 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2467                                     struct xfrm_migrate *m)
2468 {
2469         int err;
2470         struct sadb_x_ipsecrequest *rq2;
2471         int mode;
2472
2473         if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2474             len < rq1->sadb_x_ipsecrequest_len)
2475                 return -EINVAL;
2476
2477         /* old endoints */
2478         err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2479                                   &m->old_family);
2480         if (err)
2481                 return err;
2482
2483         rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2484         len -= rq1->sadb_x_ipsecrequest_len;
2485
2486         if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2487             len < rq2->sadb_x_ipsecrequest_len)
2488                 return -EINVAL;
2489
2490         /* new endpoints */
2491         err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2492                                   &m->new_family);
2493         if (err)
2494                 return err;
2495
2496         if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2497             rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2498             rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2499                 return -EINVAL;
2500
2501         m->proto = rq1->sadb_x_ipsecrequest_proto;
2502         if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2503                 return -EINVAL;
2504         m->mode = mode;
2505         m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2506
2507         return ((int)(rq1->sadb_x_ipsecrequest_len +
2508                       rq2->sadb_x_ipsecrequest_len));
2509 }
2510
2511 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2512                          struct sadb_msg *hdr, void **ext_hdrs)
2513 {
2514         int i, len, ret, err = -EINVAL;
2515         u8 dir;
2516         struct sadb_address *sa;
2517         struct sadb_x_policy *pol;
2518         struct sadb_x_ipsecrequest *rq;
2519         struct xfrm_selector sel;
2520         struct xfrm_migrate m[XFRM_MAX_DEPTH];
2521
2522         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2523             ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2524             !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2525                 err = -EINVAL;
2526                 goto out;
2527         }
2528
2529         pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2530         if (!pol) {
2531                 err = -EINVAL;
2532                 goto out;
2533         }
2534
2535         if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2536                 err = -EINVAL;
2537                 goto out;
2538         }
2539
2540         dir = pol->sadb_x_policy_dir - 1;
2541         memset(&sel, 0, sizeof(sel));
2542
2543         /* set source address info of selector */
2544         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2545         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2546         sel.prefixlen_s = sa->sadb_address_prefixlen;
2547         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2548         sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2549         if (sel.sport)
2550                 sel.sport_mask = htons(0xffff);
2551
2552         /* set destination address info of selector */
2553         sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2554         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2555         sel.prefixlen_d = sa->sadb_address_prefixlen;
2556         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2557         sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2558         if (sel.dport)
2559                 sel.dport_mask = htons(0xffff);
2560
2561         rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2562
2563         /* extract ipsecrequests */
2564         i = 0;
2565         len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2566
2567         while (len > 0 && i < XFRM_MAX_DEPTH) {
2568                 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2569                 if (ret < 0) {
2570                         err = ret;
2571                         goto out;
2572                 } else {
2573                         rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2574                         len -= ret;
2575                         i++;
2576                 }
2577         }
2578
2579         if (!i || len > 0) {
2580                 err = -EINVAL;
2581                 goto out;
2582         }
2583
2584         return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2585
2586  out:
2587         return err;
2588 }
2589 #else
2590 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2591                          struct sadb_msg *hdr, void **ext_hdrs)
2592 {
2593         return -ENOPROTOOPT;
2594 }
2595 #endif
2596
2597
2598 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2599 {
2600         unsigned int dir;
2601         int err = 0, delete;
2602         struct sadb_x_policy *pol;
2603         struct xfrm_policy *xp;
2604         struct km_event c;
2605
2606         if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2607                 return -EINVAL;
2608
2609         dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2610         if (dir >= XFRM_POLICY_MAX)
2611                 return -EINVAL;
2612
2613         delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2614         xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2615                               delete, &err);
2616         if (xp == NULL)
2617                 return -ENOENT;
2618
2619         if (delete) {
2620                 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2621                                 audit_get_loginuid(current->audit_context), 0);
2622
2623                 if (err)
2624                         goto out;
2625                 c.seq = hdr->sadb_msg_seq;
2626                 c.pid = hdr->sadb_msg_pid;
2627                 c.data.byid = 1;
2628                 c.event = XFRM_MSG_DELPOLICY;
2629                 km_policy_notify(xp, dir, &c);
2630         } else {
2631                 err = key_pol_get_resp(sk, xp, hdr, dir);
2632         }
2633
2634 out:
2635         xfrm_pol_put(xp);
2636         return err;
2637 }
2638
2639 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2640 {
2641         struct pfkey_dump_data *data = ptr;
2642         struct sk_buff *out_skb;
2643         struct sadb_msg *out_hdr;
2644         int err;
2645
2646         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2647         if (IS_ERR(out_skb))
2648                 return PTR_ERR(out_skb);
2649
2650         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2651         if (err < 0)
2652                 return err;
2653
2654         out_hdr = (struct sadb_msg *) out_skb->data;
2655         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2656         out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2657         out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2658         out_hdr->sadb_msg_errno = 0;
2659         out_hdr->sadb_msg_seq = count;
2660         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2661         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2662         return 0;
2663 }
2664
2665 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2666 {
2667         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2668
2669         return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data);
2670 }
2671
2672 static int key_notify_policy_flush(struct km_event *c)
2673 {
2674         struct sk_buff *skb_out;
2675         struct sadb_msg *hdr;
2676
2677         skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2678         if (!skb_out)
2679                 return -ENOBUFS;
2680         hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2681         hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2682         hdr->sadb_msg_seq = c->seq;
2683         hdr->sadb_msg_pid = c->pid;
2684         hdr->sadb_msg_version = PF_KEY_V2;
2685         hdr->sadb_msg_errno = (uint8_t) 0;
2686         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2687         pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2688         return 0;
2689
2690 }
2691
2692 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2693 {
2694         struct km_event c;
2695         struct xfrm_audit audit_info;
2696         int err;
2697
2698         audit_info.loginuid = audit_get_loginuid(current->audit_context);
2699         audit_info.secid = 0;
2700         err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2701         if (err)
2702                 return err;
2703         c.data.type = XFRM_POLICY_TYPE_MAIN;
2704         c.event = XFRM_MSG_FLUSHPOLICY;
2705         c.pid = hdr->sadb_msg_pid;
2706         c.seq = hdr->sadb_msg_seq;
2707         km_policy_notify(NULL, 0, &c);
2708
2709         return 0;
2710 }
2711
2712 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2713                              struct sadb_msg *hdr, void **ext_hdrs);
2714 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2715         [SADB_RESERVED]         = pfkey_reserved,
2716         [SADB_GETSPI]           = pfkey_getspi,
2717         [SADB_UPDATE]           = pfkey_add,
2718         [SADB_ADD]              = pfkey_add,
2719         [SADB_DELETE]           = pfkey_delete,
2720         [SADB_GET]              = pfkey_get,
2721         [SADB_ACQUIRE]          = pfkey_acquire,
2722         [SADB_REGISTER]         = pfkey_register,
2723         [SADB_EXPIRE]           = NULL,
2724         [SADB_FLUSH]            = pfkey_flush,
2725         [SADB_DUMP]             = pfkey_dump,
2726         [SADB_X_PROMISC]        = pfkey_promisc,
2727         [SADB_X_PCHANGE]        = NULL,
2728         [SADB_X_SPDUPDATE]      = pfkey_spdadd,
2729         [SADB_X_SPDADD]         = pfkey_spdadd,
2730         [SADB_X_SPDDELETE]      = pfkey_spddelete,
2731         [SADB_X_SPDGET]         = pfkey_spdget,
2732         [SADB_X_SPDACQUIRE]     = NULL,
2733         [SADB_X_SPDDUMP]        = pfkey_spddump,
2734         [SADB_X_SPDFLUSH]       = pfkey_spdflush,
2735         [SADB_X_SPDSETIDX]      = pfkey_spdadd,
2736         [SADB_X_SPDDELETE2]     = pfkey_spdget,
2737         [SADB_X_MIGRATE]        = pfkey_migrate,
2738 };
2739
2740 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2741 {
2742         void *ext_hdrs[SADB_EXT_MAX];
2743         int err;
2744
2745         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2746                         BROADCAST_PROMISC_ONLY, NULL);
2747
2748         memset(ext_hdrs, 0, sizeof(ext_hdrs));
2749         err = parse_exthdrs(skb, hdr, ext_hdrs);
2750         if (!err) {
2751                 err = -EOPNOTSUPP;
2752                 if (pfkey_funcs[hdr->sadb_msg_type])
2753                         err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2754         }
2755         return err;
2756 }
2757
2758 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2759 {
2760         struct sadb_msg *hdr = NULL;
2761
2762         if (skb->len < sizeof(*hdr)) {
2763                 *errp = -EMSGSIZE;
2764         } else {
2765                 hdr = (struct sadb_msg *) skb->data;
2766                 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2767                     hdr->sadb_msg_reserved != 0 ||
2768                     (hdr->sadb_msg_type <= SADB_RESERVED ||
2769                      hdr->sadb_msg_type > SADB_MAX)) {
2770                         hdr = NULL;
2771                         *errp = -EINVAL;
2772                 } else if (hdr->sadb_msg_len != (skb->len /
2773                                                  sizeof(uint64_t)) ||
2774                            hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2775                                                 sizeof(uint64_t))) {
2776                         hdr = NULL;
2777                         *errp = -EMSGSIZE;
2778                 } else {
2779                         *errp = 0;
2780                 }
2781         }
2782         return hdr;
2783 }
2784
2785 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2786 {
2787         unsigned int id = d->desc.sadb_alg_id;
2788
2789         if (id >= sizeof(t->aalgos) * 8)
2790                 return 0;
2791
2792         return (t->aalgos >> id) & 1;
2793 }
2794
2795 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2796 {
2797         unsigned int id = d->desc.sadb_alg_id;
2798
2799         if (id >= sizeof(t->ealgos) * 8)
2800                 return 0;
2801
2802         return (t->ealgos >> id) & 1;
2803 }
2804
2805 static int count_ah_combs(struct xfrm_tmpl *t)
2806 {
2807         int i, sz = 0;
2808
2809         for (i = 0; ; i++) {
2810                 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2811                 if (!aalg)
2812                         break;
2813                 if (aalg_tmpl_set(t, aalg) && aalg->available)
2814                         sz += sizeof(struct sadb_comb);
2815         }
2816         return sz + sizeof(struct sadb_prop);
2817 }
2818
2819 static int count_esp_combs(struct xfrm_tmpl *t)
2820 {
2821         int i, k, sz = 0;
2822
2823         for (i = 0; ; i++) {
2824                 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2825                 if (!ealg)
2826                         break;
2827
2828                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2829                         continue;
2830
2831                 for (k = 1; ; k++) {
2832                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2833                         if (!aalg)
2834                                 break;
2835
2836                         if (aalg_tmpl_set(t, aalg) && aalg->available)
2837                                 sz += sizeof(struct sadb_comb);
2838                 }
2839         }
2840         return sz + sizeof(struct sadb_prop);
2841 }
2842
2843 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2844 {
2845         struct sadb_prop *p;
2846         int i;
2847
2848         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2849         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2850         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2851         p->sadb_prop_replay = 32;
2852         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2853
2854         for (i = 0; ; i++) {
2855                 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2856                 if (!aalg)
2857                         break;
2858
2859                 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2860                         struct sadb_comb *c;
2861                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2862                         memset(c, 0, sizeof(*c));
2863                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2864                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2865                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2866                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2867                         c->sadb_comb_hard_addtime = 24*60*60;
2868                         c->sadb_comb_soft_addtime = 20*60*60;
2869                         c->sadb_comb_hard_usetime = 8*60*60;
2870                         c->sadb_comb_soft_usetime = 7*60*60;
2871                 }
2872         }
2873 }
2874
2875 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2876 {
2877         struct sadb_prop *p;
2878         int i, k;
2879
2880         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2881         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2882         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2883         p->sadb_prop_replay = 32;
2884         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2885
2886         for (i=0; ; i++) {
2887                 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2888                 if (!ealg)
2889                         break;
2890
2891                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2892                         continue;
2893
2894                 for (k = 1; ; k++) {
2895                         struct sadb_comb *c;
2896                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2897                         if (!aalg)
2898                                 break;
2899                         if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2900                                 continue;
2901                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2902                         memset(c, 0, sizeof(*c));
2903                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2904                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2905                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2906                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2907                         c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2908                         c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2909                         c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2910                         c->sadb_comb_hard_addtime = 24*60*60;
2911                         c->sadb_comb_soft_addtime = 20*60*60;
2912                         c->sadb_comb_hard_usetime = 8*60*60;
2913                         c->sadb_comb_soft_usetime = 7*60*60;
2914                 }
2915         }
2916 }
2917
2918 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2919 {
2920         return 0;
2921 }
2922
2923 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2924 {
2925         struct sk_buff *out_skb;
2926         struct sadb_msg *out_hdr;
2927         int hard;
2928         int hsc;
2929
2930         hard = c->data.hard;
2931         if (hard)
2932                 hsc = 2;
2933         else
2934                 hsc = 1;
2935
2936         out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
2937         if (IS_ERR(out_skb))
2938                 return PTR_ERR(out_skb);
2939
2940         out_hdr = (struct sadb_msg *) out_skb->data;
2941         out_hdr->sadb_msg_version = PF_KEY_V2;
2942         out_hdr->sadb_msg_type = SADB_EXPIRE;
2943         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2944         out_hdr->sadb_msg_errno = 0;
2945         out_hdr->sadb_msg_reserved = 0;
2946         out_hdr->sadb_msg_seq = 0;
2947         out_hdr->sadb_msg_pid = 0;
2948
2949         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2950         return 0;
2951 }
2952
2953 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2954 {
2955         switch (c->event) {
2956         case XFRM_MSG_EXPIRE:
2957                 return key_notify_sa_expire(x, c);
2958         case XFRM_MSG_DELSA:
2959         case XFRM_MSG_NEWSA:
2960         case XFRM_MSG_UPDSA:
2961                 return key_notify_sa(x, c);
2962         case XFRM_MSG_FLUSHSA:
2963                 return key_notify_sa_flush(c);
2964         case XFRM_MSG_NEWAE: /* not yet supported */
2965                 break;
2966         default:
2967                 printk("pfkey: Unknown SA event %d\n", c->event);
2968                 break;
2969         }
2970
2971         return 0;
2972 }
2973
2974 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2975 {
2976         if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2977                 return 0;
2978
2979         switch (c->event) {
2980         case XFRM_MSG_POLEXPIRE:
2981                 return key_notify_policy_expire(xp, c);
2982         case XFRM_MSG_DELPOLICY:
2983         case XFRM_MSG_NEWPOLICY:
2984         case XFRM_MSG_UPDPOLICY:
2985                 return key_notify_policy(xp, dir, c);
2986         case XFRM_MSG_FLUSHPOLICY:
2987                 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2988                         break;
2989                 return key_notify_policy_flush(c);
2990         default:
2991                 printk("pfkey: Unknown policy event %d\n", c->event);
2992                 break;
2993         }
2994
2995         return 0;
2996 }
2997
2998 static u32 get_acqseq(void)
2999 {
3000         u32 res;
3001         static u32 acqseq;
3002         static DEFINE_SPINLOCK(acqseq_lock);
3003
3004         spin_lock_bh(&acqseq_lock);
3005         res = (++acqseq ? : ++acqseq);
3006         spin_unlock_bh(&acqseq_lock);
3007         return res;
3008 }
3009
3010 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
3011 {
3012         struct sk_buff *skb;
3013         struct sadb_msg *hdr;
3014         struct sadb_address *addr;
3015         struct sadb_x_policy *pol;
3016         struct sockaddr_in *sin;
3017 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3018         struct sockaddr_in6 *sin6;
3019 #endif
3020         int sockaddr_size;
3021         int size;
3022         struct sadb_x_sec_ctx *sec_ctx;
3023         struct xfrm_sec_ctx *xfrm_ctx;
3024         int ctx_size = 0;
3025
3026         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3027         if (!sockaddr_size)
3028                 return -EINVAL;
3029
3030         size = sizeof(struct sadb_msg) +
3031                 (sizeof(struct sadb_address) * 2) +
3032                 (sockaddr_size * 2) +
3033                 sizeof(struct sadb_x_policy);
3034
3035         if (x->id.proto == IPPROTO_AH)
3036                 size += count_ah_combs(t);
3037         else if (x->id.proto == IPPROTO_ESP)
3038                 size += count_esp_combs(t);
3039
3040         if ((xfrm_ctx = x->security)) {
3041                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3042                 size +=  sizeof(struct sadb_x_sec_ctx) + ctx_size;
3043         }
3044
3045         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3046         if (skb == NULL)
3047                 return -ENOMEM;
3048
3049         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3050         hdr->sadb_msg_version = PF_KEY_V2;
3051         hdr->sadb_msg_type = SADB_ACQUIRE;
3052         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3053         hdr->sadb_msg_len = size / sizeof(uint64_t);
3054         hdr->sadb_msg_errno = 0;
3055         hdr->sadb_msg_reserved = 0;
3056         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3057         hdr->sadb_msg_pid = 0;
3058
3059         /* src address */
3060         addr = (struct sadb_address*) skb_put(skb,
3061                                               sizeof(struct sadb_address)+sockaddr_size);
3062         addr->sadb_address_len =
3063                 (sizeof(struct sadb_address)+sockaddr_size)/
3064                         sizeof(uint64_t);
3065         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3066         addr->sadb_address_proto = 0;
3067         addr->sadb_address_reserved = 0;
3068         if (x->props.family == AF_INET) {
3069                 addr->sadb_address_prefixlen = 32;
3070
3071                 sin = (struct sockaddr_in *) (addr + 1);
3072                 sin->sin_family = AF_INET;
3073                 sin->sin_addr.s_addr = x->props.saddr.a4;
3074                 sin->sin_port = 0;
3075                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3076         }
3077 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3078         else if (x->props.family == AF_INET6) {
3079                 addr->sadb_address_prefixlen = 128;
3080
3081                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3082                 sin6->sin6_family = AF_INET6;
3083                 sin6->sin6_port = 0;
3084                 sin6->sin6_flowinfo = 0;
3085                 memcpy(&sin6->sin6_addr,
3086                        x->props.saddr.a6, sizeof(struct in6_addr));
3087                 sin6->sin6_scope_id = 0;
3088         }
3089 #endif
3090         else
3091                 BUG();
3092
3093         /* dst address */
3094         addr = (struct sadb_address*) skb_put(skb,
3095                                               sizeof(struct sadb_address)+sockaddr_size);
3096         addr->sadb_address_len =
3097                 (sizeof(struct sadb_address)+sockaddr_size)/
3098                         sizeof(uint64_t);
3099         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3100         addr->sadb_address_proto = 0;
3101         addr->sadb_address_reserved = 0;
3102         if (x->props.family == AF_INET) {
3103                 addr->sadb_address_prefixlen = 32;
3104
3105                 sin = (struct sockaddr_in *) (addr + 1);
3106                 sin->sin_family = AF_INET;
3107                 sin->sin_addr.s_addr = x->id.daddr.a4;
3108                 sin->sin_port = 0;
3109                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3110         }
3111 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3112         else if (x->props.family == AF_INET6) {
3113                 addr->sadb_address_prefixlen = 128;
3114
3115                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3116                 sin6->sin6_family = AF_INET6;
3117                 sin6->sin6_port = 0;
3118                 sin6->sin6_flowinfo = 0;
3119                 memcpy(&sin6->sin6_addr,
3120                        x->id.daddr.a6, sizeof(struct in6_addr));
3121                 sin6->sin6_scope_id = 0;
3122         }
3123 #endif
3124         else
3125                 BUG();
3126
3127         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
3128         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3129         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3130         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3131         pol->sadb_x_policy_dir = dir+1;
3132         pol->sadb_x_policy_id = xp->index;
3133
3134         /* Set sadb_comb's. */
3135         if (x->id.proto == IPPROTO_AH)
3136                 dump_ah_combs(skb, t);
3137         else if (x->id.proto == IPPROTO_ESP)
3138                 dump_esp_combs(skb, t);
3139
3140         /* security context */
3141         if (xfrm_ctx) {
3142                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3143                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3144                 sec_ctx->sadb_x_sec_len =
3145                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3146                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3147                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3148                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3149                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3150                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3151                        xfrm_ctx->ctx_len);
3152         }
3153
3154         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3155 }
3156
3157 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3158                                                 u8 *data, int len, int *dir)
3159 {
3160         struct xfrm_policy *xp;
3161         struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3162         struct sadb_x_sec_ctx *sec_ctx;
3163
3164         switch (sk->sk_family) {
3165         case AF_INET:
3166                 if (opt != IP_IPSEC_POLICY) {
3167                         *dir = -EOPNOTSUPP;
3168                         return NULL;
3169                 }
3170                 break;
3171 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3172         case AF_INET6:
3173                 if (opt != IPV6_IPSEC_POLICY) {
3174                         *dir = -EOPNOTSUPP;
3175                         return NULL;
3176                 }
3177                 break;
3178 #endif
3179         default:
3180                 *dir = -EINVAL;
3181                 return NULL;
3182         }
3183
3184         *dir = -EINVAL;
3185
3186         if (len < sizeof(struct sadb_x_policy) ||
3187             pol->sadb_x_policy_len*8 > len ||
3188             pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3189             (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3190                 return NULL;
3191
3192         xp = xfrm_policy_alloc(GFP_ATOMIC);
3193         if (xp == NULL) {
3194                 *dir = -ENOBUFS;
3195                 return NULL;
3196         }
3197
3198         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3199                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3200
3201         xp->lft.soft_byte_limit = XFRM_INF;
3202         xp->lft.hard_byte_limit = XFRM_INF;
3203         xp->lft.soft_packet_limit = XFRM_INF;
3204         xp->lft.hard_packet_limit = XFRM_INF;
3205         xp->family = sk->sk_family;
3206
3207         xp->xfrm_nr = 0;
3208         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3209             (*dir = parse_ipsecrequests(xp, pol)) < 0)
3210                 goto out;
3211
3212         /* security context too */
3213         if (len >= (pol->sadb_x_policy_len*8 +
3214             sizeof(struct sadb_x_sec_ctx))) {
3215                 char *p = (char *)pol;
3216                 struct xfrm_user_sec_ctx *uctx;
3217
3218                 p += pol->sadb_x_policy_len*8;
3219                 sec_ctx = (struct sadb_x_sec_ctx *)p;
3220                 if (len < pol->sadb_x_policy_len*8 +
3221                     sec_ctx->sadb_x_sec_len) {
3222                         *dir = -EINVAL;
3223                         goto out;
3224                 }
3225                 if ((*dir = verify_sec_ctx_len(p)))
3226                         goto out;
3227                 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3228                 *dir = security_xfrm_policy_alloc(xp, uctx);
3229                 kfree(uctx);
3230
3231                 if (*dir)
3232                         goto out;
3233         }
3234
3235         *dir = pol->sadb_x_policy_dir-1;
3236         return xp;
3237
3238 out:
3239         security_xfrm_policy_free(xp);
3240         kfree(xp);
3241         return NULL;
3242 }
3243
3244 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3245 {
3246         struct sk_buff *skb;
3247         struct sadb_msg *hdr;
3248         struct sadb_sa *sa;
3249         struct sadb_address *addr;
3250         struct sadb_x_nat_t_port *n_port;
3251         struct sockaddr_in *sin;
3252 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3253         struct sockaddr_in6 *sin6;
3254 #endif
3255         int sockaddr_size;
3256         int size;
3257         __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3258         struct xfrm_encap_tmpl *natt = NULL;
3259
3260         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3261         if (!sockaddr_size)
3262                 return -EINVAL;
3263
3264         if (!satype)
3265                 return -EINVAL;
3266
3267         if (!x->encap)
3268                 return -EINVAL;
3269
3270         natt = x->encap;
3271
3272         /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3273          *
3274          * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3275          * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3276          */
3277
3278         size = sizeof(struct sadb_msg) +
3279                 sizeof(struct sadb_sa) +
3280                 (sizeof(struct sadb_address) * 2) +
3281                 (sockaddr_size * 2) +
3282                 (sizeof(struct sadb_x_nat_t_port) * 2);
3283
3284         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3285         if (skb == NULL)
3286                 return -ENOMEM;
3287
3288         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3289         hdr->sadb_msg_version = PF_KEY_V2;
3290         hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3291         hdr->sadb_msg_satype = satype;
3292         hdr->sadb_msg_len = size / sizeof(uint64_t);
3293         hdr->sadb_msg_errno = 0;
3294         hdr->sadb_msg_reserved = 0;
3295         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3296         hdr->sadb_msg_pid = 0;
3297
3298         /* SA */
3299         sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3300         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3301         sa->sadb_sa_exttype = SADB_EXT_SA;
3302         sa->sadb_sa_spi = x->id.spi;
3303         sa->sadb_sa_replay = 0;
3304         sa->sadb_sa_state = 0;
3305         sa->sadb_sa_auth = 0;
3306         sa->sadb_sa_encrypt = 0;
3307         sa->sadb_sa_flags = 0;
3308
3309         /* ADDRESS_SRC (old addr) */
3310         addr = (struct sadb_address*)
3311                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3312         addr->sadb_address_len =
3313                 (sizeof(struct sadb_address)+sockaddr_size)/
3314                         sizeof(uint64_t);
3315         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3316         addr->sadb_address_proto = 0;
3317         addr->sadb_address_reserved = 0;
3318         if (x->props.family == AF_INET) {
3319                 addr->sadb_address_prefixlen = 32;
3320
3321                 sin = (struct sockaddr_in *) (addr + 1);
3322                 sin->sin_family = AF_INET;
3323                 sin->sin_addr.s_addr = x->props.saddr.a4;
3324                 sin->sin_port = 0;
3325                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3326         }
3327 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3328         else if (x->props.family == AF_INET6) {
3329                 addr->sadb_address_prefixlen = 128;
3330
3331                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3332                 sin6->sin6_family = AF_INET6;
3333                 sin6->sin6_port = 0;
3334                 sin6->sin6_flowinfo = 0;
3335                 memcpy(&sin6->sin6_addr,
3336                        x->props.saddr.a6, sizeof(struct in6_addr));
3337                 sin6->sin6_scope_id = 0;
3338         }
3339 #endif
3340         else
3341                 BUG();
3342
3343         /* NAT_T_SPORT (old port) */
3344         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3345         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3346         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3347         n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3348         n_port->sadb_x_nat_t_port_reserved = 0;
3349
3350         /* ADDRESS_DST (new addr) */
3351         addr = (struct sadb_address*)
3352                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3353         addr->sadb_address_len =
3354                 (sizeof(struct sadb_address)+sockaddr_size)/
3355                         sizeof(uint64_t);
3356         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3357         addr->sadb_address_proto = 0;
3358         addr->sadb_address_reserved = 0;
3359         if (x->props.family == AF_INET) {
3360                 addr->sadb_address_prefixlen = 32;
3361
3362                 sin = (struct sockaddr_in *) (addr + 1);
3363                 sin->sin_family = AF_INET;
3364                 sin->sin_addr.s_addr = ipaddr->a4;
3365                 sin->sin_port = 0;
3366                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3367         }
3368 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3369         else if (x->props.family == AF_INET6) {
3370                 addr->sadb_address_prefixlen = 128;
3371
3372                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3373                 sin6->sin6_family = AF_INET6;
3374                 sin6->sin6_port = 0;
3375                 sin6->sin6_flowinfo = 0;
3376                 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3377                 sin6->sin6_scope_id = 0;
3378         }
3379 #endif
3380         else
3381                 BUG();
3382
3383         /* NAT_T_DPORT (new port) */
3384         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3385         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3386         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3387         n_port->sadb_x_nat_t_port_port = sport;
3388         n_port->sadb_x_nat_t_port_reserved = 0;
3389
3390         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3391 }
3392
3393 #ifdef CONFIG_NET_KEY_MIGRATE
3394 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3395                             struct xfrm_selector *sel)
3396 {
3397         struct sadb_address *addr;
3398         struct sockaddr_in *sin;
3399 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3400         struct sockaddr_in6 *sin6;
3401 #endif
3402         addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3403         addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3404         addr->sadb_address_exttype = type;
3405         addr->sadb_address_proto = sel->proto;
3406         addr->sadb_address_reserved = 0;
3407
3408         switch (type) {
3409         case SADB_EXT_ADDRESS_SRC:
3410                 if (sel->family == AF_INET) {
3411                         addr->sadb_address_prefixlen = sel->prefixlen_s;
3412                         sin = (struct sockaddr_in *)(addr + 1);
3413                         sin->sin_family = AF_INET;
3414                         memcpy(&sin->sin_addr.s_addr, &sel->saddr,
3415                                sizeof(sin->sin_addr.s_addr));
3416                         sin->sin_port = 0;
3417                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3418                 }
3419 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3420                 else if (sel->family == AF_INET6) {
3421                         addr->sadb_address_prefixlen = sel->prefixlen_s;
3422                         sin6 = (struct sockaddr_in6 *)(addr + 1);
3423                         sin6->sin6_family = AF_INET6;
3424                         sin6->sin6_port = 0;
3425                         sin6->sin6_flowinfo = 0;
3426                         sin6->sin6_scope_id = 0;
3427                         memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr,
3428                                sizeof(sin6->sin6_addr.s6_addr));
3429                 }
3430 #endif
3431                 break;
3432         case SADB_EXT_ADDRESS_DST:
3433                 if (sel->family == AF_INET) {
3434                         addr->sadb_address_prefixlen = sel->prefixlen_d;
3435                         sin = (struct sockaddr_in *)(addr + 1);
3436                         sin->sin_family = AF_INET;
3437                         memcpy(&sin->sin_addr.s_addr, &sel->daddr,
3438                                sizeof(sin->sin_addr.s_addr));
3439                         sin->sin_port = 0;
3440                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3441                 }
3442 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3443                 else if (sel->family == AF_INET6) {
3444                         addr->sadb_address_prefixlen = sel->prefixlen_d;
3445                         sin6 = (struct sockaddr_in6 *)(addr + 1);
3446                         sin6->sin6_family = AF_INET6;
3447                         sin6->sin6_port = 0;
3448                         sin6->sin6_flowinfo = 0;
3449                         sin6->sin6_scope_id = 0;
3450                         memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr,
3451                                sizeof(sin6->sin6_addr.s6_addr));
3452                 }
3453 #endif
3454                 break;
3455         default:
3456                 return -EINVAL;
3457         }
3458
3459         return 0;
3460 }
3461
3462 static int set_ipsecrequest(struct sk_buff *skb,
3463                             uint8_t proto, uint8_t mode, int level,
3464                             uint32_t reqid, uint8_t family,
3465                             xfrm_address_t *src, xfrm_address_t *dst)
3466 {
3467         struct sadb_x_ipsecrequest *rq;
3468         struct sockaddr_in *sin;
3469 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3470         struct sockaddr_in6 *sin6;
3471 #endif
3472         int size_req;
3473
3474         size_req = sizeof(struct sadb_x_ipsecrequest) +
3475                    pfkey_sockaddr_pair_size(family);
3476
3477         rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3478         memset(rq, 0, size_req);
3479         rq->sadb_x_ipsecrequest_len = size_req;
3480         rq->sadb_x_ipsecrequest_proto = proto;
3481         rq->sadb_x_ipsecrequest_mode = mode;
3482         rq->sadb_x_ipsecrequest_level = level;
3483         rq->sadb_x_ipsecrequest_reqid = reqid;
3484
3485         switch (family) {
3486         case AF_INET:
3487                 sin = (struct sockaddr_in *)(rq + 1);
3488                 sin->sin_family = AF_INET;
3489                 memcpy(&sin->sin_addr.s_addr, src,
3490                        sizeof(sin->sin_addr.s_addr));
3491                 sin++;
3492                 sin->sin_family = AF_INET;
3493                 memcpy(&sin->sin_addr.s_addr, dst,
3494                        sizeof(sin->sin_addr.s_addr));
3495                 break;
3496 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3497         case AF_INET6:
3498                 sin6 = (struct sockaddr_in6 *)(rq + 1);
3499                 sin6->sin6_family = AF_INET6;
3500                 sin6->sin6_port = 0;
3501                 sin6->sin6_flowinfo = 0;
3502                 sin6->sin6_scope_id = 0;
3503                 memcpy(&sin6->sin6_addr.s6_addr, src,
3504                        sizeof(sin6->sin6_addr.s6_addr));
3505                 sin6++;
3506                 sin6->sin6_family = AF_INET6;
3507                 sin6->sin6_port = 0;
3508                 sin6->sin6_flowinfo = 0;
3509                 sin6->sin6_scope_id = 0;
3510                 memcpy(&sin6->sin6_addr.s6_addr, dst,
3511                        sizeof(sin6->sin6_addr.s6_addr));
3512                 break;
3513 #endif
3514         default:
3515                 return -EINVAL;
3516         }
3517
3518         return 0;
3519 }
3520 #endif
3521
3522 #ifdef CONFIG_NET_KEY_MIGRATE
3523 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3524                               struct xfrm_migrate *m, int num_bundles)
3525 {
3526         int i;
3527         int sasize_sel;
3528         int size = 0;
3529         int size_pol = 0;
3530         struct sk_buff *skb;
3531         struct sadb_msg *hdr;
3532         struct sadb_x_policy *pol;
3533         struct xfrm_migrate *mp;
3534
3535         if (type != XFRM_POLICY_TYPE_MAIN)
3536                 return 0;
3537
3538         if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3539                 return -EINVAL;
3540
3541         /* selector */
3542         sasize_sel = pfkey_sockaddr_size(sel->family);
3543         if (!sasize_sel)
3544                 return -EINVAL;
3545         size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3546
3547         /* policy info */
3548         size_pol += sizeof(struct sadb_x_policy);
3549
3550         /* ipsecrequests */
3551         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3552                 /* old locator pair */
3553                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3554                             pfkey_sockaddr_pair_size(mp->old_family);
3555                 /* new locator pair */
3556                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3557                             pfkey_sockaddr_pair_size(mp->new_family);
3558         }
3559
3560         size += sizeof(struct sadb_msg) + size_pol;
3561
3562         /* alloc buffer */
3563         skb = alloc_skb(size, GFP_ATOMIC);
3564         if (skb == NULL)
3565                 return -ENOMEM;
3566
3567         hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3568         hdr->sadb_msg_version = PF_KEY_V2;
3569         hdr->sadb_msg_type = SADB_X_MIGRATE;
3570         hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3571         hdr->sadb_msg_len = size / 8;
3572         hdr->sadb_msg_errno = 0;
3573         hdr->sadb_msg_reserved = 0;
3574         hdr->sadb_msg_seq = 0;
3575         hdr->sadb_msg_pid = 0;
3576
3577         /* selector src */
3578         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3579
3580         /* selector dst */
3581         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3582
3583         /* policy information */
3584         pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3585         pol->sadb_x_policy_len = size_pol / 8;
3586         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3587         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3588         pol->sadb_x_policy_dir = dir + 1;
3589         pol->sadb_x_policy_id = 0;
3590         pol->sadb_x_policy_priority = 0;
3591
3592         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3593                 /* old ipsecrequest */
3594                 int mode = pfkey_mode_from_xfrm(mp->mode);
3595                 if (mode < 0)
3596                         goto err;
3597                 if (set_ipsecrequest(skb, mp->proto, mode,
3598                                      (mp->reqid ?  IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3599                                      mp->reqid, mp->old_family,
3600                                      &mp->old_saddr, &mp->old_daddr) < 0)
3601                         goto err;
3602
3603                 /* new ipsecrequest */
3604                 if (set_ipsecrequest(skb, mp->proto, mode,
3605                                      (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3606                                      mp->reqid, mp->new_family,
3607                                      &mp->new_saddr, &mp->new_daddr) < 0)
3608                         goto err;
3609         }
3610
3611         /* broadcast migrate message to sockets */
3612         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3613
3614         return 0;
3615
3616 err:
3617         kfree_skb(skb);
3618         return -EINVAL;
3619 }
3620 #else
3621 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3622                               struct xfrm_migrate *m, int num_bundles)
3623 {
3624         return -ENOPROTOOPT;
3625 }
3626 #endif
3627
3628 static int pfkey_sendmsg(struct kiocb *kiocb,
3629                          struct socket *sock, struct msghdr *msg, size_t len)
3630 {
3631         struct sock *sk = sock->sk;
3632         struct sk_buff *skb = NULL;
3633         struct sadb_msg *hdr = NULL;
3634         int err;
3635
3636         err = -EOPNOTSUPP;
3637         if (msg->msg_flags & MSG_OOB)
3638                 goto out;
3639
3640         err = -EMSGSIZE;
3641         if ((unsigned)len > sk->sk_sndbuf - 32)
3642                 goto out;
3643
3644         err = -ENOBUFS;
3645         skb = alloc_skb(len, GFP_KERNEL);
3646         if (skb == NULL)
3647                 goto out;
3648
3649         err = -EFAULT;
3650         if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3651                 goto out;
3652
3653         hdr = pfkey_get_base_msg(skb, &err);
3654         if (!hdr)
3655                 goto out;
3656
3657         mutex_lock(&xfrm_cfg_mutex);
3658         err = pfkey_process(sk, skb, hdr);
3659         mutex_unlock(&xfrm_cfg_mutex);
3660
3661 out:
3662         if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3663                 err = 0;
3664         if (skb)
3665                 kfree_skb(skb);
3666
3667         return err ? : len;
3668 }
3669
3670 static int pfkey_recvmsg(struct kiocb *kiocb,
3671                          struct socket *sock, struct msghdr *msg, size_t len,
3672                          int flags)
3673 {
3674         struct sock *sk = sock->sk;
3675         struct sk_buff *skb;
3676         int copied, err;
3677
3678         err = -EINVAL;
3679         if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3680                 goto out;
3681
3682         msg->msg_namelen = 0;
3683         skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3684         if (skb == NULL)
3685                 goto out;
3686
3687         copied = skb->len;
3688         if (copied > len) {
3689                 msg->msg_flags |= MSG_TRUNC;
3690                 copied = len;
3691         }
3692
3693         skb_reset_transport_header(skb);
3694         err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3695         if (err)
3696                 goto out_free;
3697
3698         sock_recv_timestamp(msg, sk, skb);
3699
3700         err = (flags & MSG_TRUNC) ? skb->len : copied;
3701
3702 out_free:
3703         skb_free_datagram(sk, skb);
3704 out:
3705         return err;
3706 }
3707
3708 static const struct proto_ops pfkey_ops = {
3709         .family         =       PF_KEY,
3710         .owner          =       THIS_MODULE,
3711         /* Operations that make no sense on pfkey sockets. */
3712         .bind           =       sock_no_bind,
3713         .connect        =       sock_no_connect,
3714         .socketpair     =       sock_no_socketpair,
3715         .accept         =       sock_no_accept,
3716         .getname        =       sock_no_getname,
3717         .ioctl          =       sock_no_ioctl,
3718         .listen         =       sock_no_listen,
3719         .shutdown       =       sock_no_shutdown,
3720         .setsockopt     =       sock_no_setsockopt,
3721         .getsockopt     =       sock_no_getsockopt,
3722         .mmap           =       sock_no_mmap,
3723         .sendpage       =       sock_no_sendpage,
3724
3725         /* Now the operations that really occur. */
3726         .release        =       pfkey_release,
3727         .poll           =       datagram_poll,
3728         .sendmsg        =       pfkey_sendmsg,
3729         .recvmsg        =       pfkey_recvmsg,
3730 };
3731
3732 static struct net_proto_family pfkey_family_ops = {
3733         .family =       PF_KEY,
3734         .create =       pfkey_create,
3735         .owner  =       THIS_MODULE,
3736 };
3737
3738 #ifdef CONFIG_PROC_FS
3739 static int pfkey_read_proc(char *buffer, char **start, off_t offset,
3740                            int length, int *eof, void *data)
3741 {
3742         off_t pos = 0;
3743         off_t begin = 0;
3744         int len = 0;
3745         struct sock *s;
3746         struct hlist_node *node;
3747
3748         len += sprintf(buffer,"sk       RefCnt Rmem   Wmem   User   Inode\n");
3749
3750         read_lock(&pfkey_table_lock);
3751
3752         sk_for_each(s, node, &pfkey_table) {
3753                 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
3754                                s,
3755                                atomic_read(&s->sk_refcnt),
3756                                atomic_read(&s->sk_rmem_alloc),
3757                                atomic_read(&s->sk_wmem_alloc),
3758                                sock_i_uid(s),
3759                                sock_i_ino(s)
3760                                );
3761
3762                 buffer[len++] = '\n';
3763
3764                 pos = begin + len;
3765                 if (pos < offset) {
3766                         len = 0;
3767                         begin = pos;
3768                 }
3769                 if(pos > offset + length)
3770                         goto done;
3771         }
3772         *eof = 1;
3773
3774 done:
3775         read_unlock(&pfkey_table_lock);
3776
3777         *start = buffer + (offset - begin);
3778         len -= (offset - begin);
3779
3780         if (len > length)
3781                 len = length;
3782         if (len < 0)
3783                 len = 0;
3784
3785         return len;
3786 }
3787 #endif
3788
3789 static struct xfrm_mgr pfkeyv2_mgr =
3790 {
3791         .id             = "pfkeyv2",
3792         .notify         = pfkey_send_notify,
3793         .acquire        = pfkey_send_acquire,
3794         .compile_policy = pfkey_compile_policy,
3795         .new_mapping    = pfkey_send_new_mapping,
3796         .notify_policy  = pfkey_send_policy_notify,
3797         .migrate        = pfkey_send_migrate,
3798 };
3799
3800 static void __exit ipsec_pfkey_exit(void)
3801 {
3802         xfrm_unregister_km(&pfkeyv2_mgr);
3803         remove_proc_entry("pfkey", init_net.proc_net);
3804         sock_unregister(PF_KEY);
3805         proto_unregister(&key_proto);
3806 }
3807
3808 static int __init ipsec_pfkey_init(void)
3809 {
3810         int err = proto_register(&key_proto, 0);
3811
3812         if (err != 0)
3813                 goto out;
3814
3815         err = sock_register(&pfkey_family_ops);
3816         if (err != 0)
3817                 goto out_unregister_key_proto;
3818 #ifdef CONFIG_PROC_FS
3819         err = -ENOMEM;
3820         if (create_proc_read_entry("pfkey", 0, init_net.proc_net, pfkey_read_proc, NULL) == NULL)
3821                 goto out_sock_unregister;
3822 #endif
3823         err = xfrm_register_km(&pfkeyv2_mgr);
3824         if (err != 0)
3825                 goto out_remove_proc_entry;
3826 out:
3827         return err;
3828 out_remove_proc_entry:
3829 #ifdef CONFIG_PROC_FS
3830         remove_proc_entry("net/pfkey", NULL);
3831 out_sock_unregister:
3832 #endif
3833         sock_unregister(PF_KEY);
3834 out_unregister_key_proto:
3835         proto_unregister(&key_proto);
3836         goto out;
3837 }
3838
3839 module_init(ipsec_pfkey_init);
3840 module_exit(ipsec_pfkey_exit);
3841 MODULE_LICENSE("GPL");
3842 MODULE_ALIAS_NETPROTO(PF_KEY);