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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/xfrm.h>
  30 #include <linux/audit.h>
  31
  32 #include <net/sock.h>
  33
  34 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
  35 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
  36
  37
  38 /* List of all pfkey sockets. */
  39 static HLIST_HEAD(pfkey_table);
  40 static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
  41 static DEFINE_RWLOCK(pfkey_table_lock);
  42 static atomic_t pfkey_table_users = ATOMIC_INIT(0);
  43
  44 static atomic_t pfkey_socks_nr = ATOMIC_INIT(0);
  45
  46 struct pfkey_sock {
  47         /* struct sock must be the first member of struct pfkey_sock */
  48         struct sock     sk;
  49         int             registered;
  50         int             promisc;
  51 };
  52
  53 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
  54 {
  55         return (struct pfkey_sock *)sk;
  56 }
  57
  58 static void pfkey_sock_destruct(struct sock *sk)
  59 {
  60         skb_queue_purge(&sk->sk_receive_queue);
  61
  62         if (!sock_flag(sk, SOCK_DEAD)) {
  63                 printk("Attempt to release alive pfkey socket: %p\n", sk);
  64                 return;
  65         }
  66
  67         BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
  68         BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
  69
  70         atomic_dec(&pfkey_socks_nr);
  71 }
  72
  73 static void pfkey_table_grab(void)
  74 {
  75         write_lock_bh(&pfkey_table_lock);
  76
  77         if (atomic_read(&pfkey_table_users)) {
  78                 DECLARE_WAITQUEUE(wait, current);
  79
  80                 add_wait_queue_exclusive(&pfkey_table_wait, &wait);
  81                 for(;;) {
  82                         set_current_state(TASK_UNINTERRUPTIBLE);
  83                         if (atomic_read(&pfkey_table_users) == 0)
  84                                 break;
  85                         write_unlock_bh(&pfkey_table_lock);
  86                         schedule();
  87                         write_lock_bh(&pfkey_table_lock);
  88                 }
  89
  90                 __set_current_state(TASK_RUNNING);
  91                 remove_wait_queue(&pfkey_table_wait, &wait);
  92         }
  93 }
  94
  95 static __inline__ void pfkey_table_ungrab(void)
  96 {
  97         write_unlock_bh(&pfkey_table_lock);
  98         wake_up(&pfkey_table_wait);
  99 }
 100
 101 static __inline__ void pfkey_lock_table(void)
 102 {
 103         /* read_lock() synchronizes us to pfkey_table_grab */
 104
 105         read_lock(&pfkey_table_lock);
 106         atomic_inc(&pfkey_table_users);
 107         read_unlock(&pfkey_table_lock);
 108 }
 109
 110 static __inline__ void pfkey_unlock_table(void)
 111 {
 112         if (atomic_dec_and_test(&pfkey_table_users))
 113                 wake_up(&pfkey_table_wait);
 114 }
 115
 116
 117 static const struct proto_ops pfkey_ops;
 118
 119 static void pfkey_insert(struct sock *sk)
 120 {
 121         pfkey_table_grab();
 122         sk_add_node(sk, &pfkey_table);
 123         pfkey_table_ungrab();
 124 }
 125
 126 static void pfkey_remove(struct sock *sk)
 127 {
 128         pfkey_table_grab();
 129         sk_del_node_init(sk);
 130         pfkey_table_ungrab();
 131 }
 132
 133 static struct proto key_proto = {
 134         .name     = "KEY",
 135         .owner    = THIS_MODULE,
 136         .obj_size = sizeof(struct pfkey_sock),
 137 };
 138
 139 static int pfkey_create(struct socket *sock, int protocol)
 140 {
 141         struct sock *sk;
 142         int err;
 143
 144         if (!capable(CAP_NET_ADMIN))
 145                 return -EPERM;
 146         if (sock->type != SOCK_RAW)
 147                 return -ESOCKTNOSUPPORT;
 148         if (protocol != PF_KEY_V2)
 149                 return -EPROTONOSUPPORT;
 150
 151         err = -ENOMEM;
 152         sk = sk_alloc(PF_KEY, GFP_KERNEL, &key_proto, 1);
 153         if (sk == NULL)
 154                 goto out;
 155
 156         sock->ops = &pfkey_ops;
 157         sock_init_data(sock, sk);
 158
 159         sk->sk_family = PF_KEY;
 160         sk->sk_destruct = pfkey_sock_destruct;
 161
 162         atomic_inc(&pfkey_socks_nr);
 163
 164         pfkey_insert(sk);
 165
 166         return 0;
 167 out:
 168         return err;
 169 }
 170
 171 static int pfkey_release(struct socket *sock)
 172 {
 173         struct sock *sk = sock->sk;
 174
 175         if (!sk)
 176                 return 0;
 177
 178         pfkey_remove(sk);
 179
 180         sock_orphan(sk);
 181         sock->sk = NULL;
 182         skb_queue_purge(&sk->sk_write_queue);
 183         sock_put(sk);
 184
 185         return 0;
 186 }
 187
 188 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
 189                                gfp_t allocation, struct sock *sk)
 190 {
 191         int err = -ENOBUFS;
 192
 193         sock_hold(sk);
 194         if (*skb2 == NULL) {
 195                 if (atomic_read(&skb->users) != 1) {
 196                         *skb2 = skb_clone(skb, allocation);
 197                 } else {
 198                         *skb2 = skb;
 199                         atomic_inc(&skb->users);
 200                 }
 201         }
 202         if (*skb2 != NULL) {
 203                 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
 204                         skb_orphan(*skb2);
 205                         skb_set_owner_r(*skb2, sk);
 206                         skb_queue_tail(&sk->sk_receive_queue, *skb2);
 207                         sk->sk_data_ready(sk, (*skb2)->len);
 208                         *skb2 = NULL;
 209                         err = 0;
 210                 }
 211         }
 212         sock_put(sk);
 213         return err;
 214 }
 215
 216 /* Send SKB to all pfkey sockets matching selected criteria.  */
 217 #define BROADCAST_ALL           0
 218 #define BROADCAST_ONE           1
 219 #define BROADCAST_REGISTERED    2
 220 #define BROADCAST_PROMISC_ONLY  4
 221 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
 222                            int broadcast_flags, struct sock *one_sk)
 223 {
 224         struct sock *sk;
 225         struct hlist_node *node;
 226         struct sk_buff *skb2 = NULL;
 227         int err = -ESRCH;
 228
 229         /* XXX Do we need something like netlink_overrun?  I think
 230          * XXX PF_KEY socket apps will not mind current behavior.
 231          */
 232         if (!skb)
 233                 return -ENOMEM;
 234
 235         pfkey_lock_table();
 236         sk_for_each(sk, node, &pfkey_table) {
 237                 struct pfkey_sock *pfk = pfkey_sk(sk);
 238                 int err2;
 239
 240                 /* Yes, it means that if you are meant to receive this
 241                  * pfkey message you receive it twice as promiscuous
 242                  * socket.
 243                  */
 244                 if (pfk->promisc)
 245                         pfkey_broadcast_one(skb, &skb2, allocation, sk);
 246
 247                 /* the exact target will be processed later */
 248                 if (sk == one_sk)
 249                         continue;
 250                 if (broadcast_flags != BROADCAST_ALL) {
 251                         if (broadcast_flags & BROADCAST_PROMISC_ONLY)
 252                                 continue;
 253                         if ((broadcast_flags & BROADCAST_REGISTERED) &&
 254                             !pfk->registered)
 255                                 continue;
 256                         if (broadcast_flags & BROADCAST_ONE)
 257                                 continue;
 258                 }
 259
 260                 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
 261
 262                 /* Error is cleare after succecful sending to at least one
 263                  * registered KM */
 264                 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
 265                         err = err2;
 266         }
 267         pfkey_unlock_table();
 268
 269         if (one_sk != NULL)
 270                 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
 271
 272         if (skb2)
 273                 kfree_skb(skb2);
 274         kfree_skb(skb);
 275         return err;
 276 }
 277
 278 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
 279 {
 280         *new = *orig;
 281 }
 282
 283 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
 284 {
 285         struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
 286         struct sadb_msg *hdr;
 287
 288         if (!skb)
 289                 return -ENOBUFS;
 290
 291         /* Woe be to the platform trying to support PFKEY yet
 292          * having normal errnos outside the 1-255 range, inclusive.
 293          */
 294         err = -err;
 295         if (err == ERESTARTSYS ||
 296             err == ERESTARTNOHAND ||
 297             err == ERESTARTNOINTR)
 298                 err = EINTR;
 299         if (err >= 512)
 300                 err = EINVAL;
 301         BUG_ON(err <= 0 || err >= 256);
 302
 303         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
 304         pfkey_hdr_dup(hdr, orig);
 305         hdr->sadb_msg_errno = (uint8_t) err;
 306         hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
 307                              sizeof(uint64_t));
 308
 309         pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
 310
 311         return 0;
 312 }
 313
 314 static u8 sadb_ext_min_len[] = {
 315         [SADB_EXT_RESERVED]             = (u8) 0,
 316         [SADB_EXT_SA]                   = (u8) sizeof(struct sadb_sa),
 317         [SADB_EXT_LIFETIME_CURRENT]     = (u8) sizeof(struct sadb_lifetime),
 318         [SADB_EXT_LIFETIME_HARD]        = (u8) sizeof(struct sadb_lifetime),
 319         [SADB_EXT_LIFETIME_SOFT]        = (u8) sizeof(struct sadb_lifetime),
 320         [SADB_EXT_ADDRESS_SRC]          = (u8) sizeof(struct sadb_address),
 321         [SADB_EXT_ADDRESS_DST]          = (u8) sizeof(struct sadb_address),
 322         [SADB_EXT_ADDRESS_PROXY]        = (u8) sizeof(struct sadb_address),
 323         [SADB_EXT_KEY_AUTH]             = (u8) sizeof(struct sadb_key),
 324         [SADB_EXT_KEY_ENCRYPT]          = (u8) sizeof(struct sadb_key),
 325         [SADB_EXT_IDENTITY_SRC]         = (u8) sizeof(struct sadb_ident),
 326         [SADB_EXT_IDENTITY_DST]         = (u8) sizeof(struct sadb_ident),
 327         [SADB_EXT_SENSITIVITY]          = (u8) sizeof(struct sadb_sens),
 328         [SADB_EXT_PROPOSAL]             = (u8) sizeof(struct sadb_prop),
 329         [SADB_EXT_SUPPORTED_AUTH]       = (u8) sizeof(struct sadb_supported),
 330         [SADB_EXT_SUPPORTED_ENCRYPT]    = (u8) sizeof(struct sadb_supported),
 331         [SADB_EXT_SPIRANGE]             = (u8) sizeof(struct sadb_spirange),
 332         [SADB_X_EXT_KMPRIVATE]          = (u8) sizeof(struct sadb_x_kmprivate),
 333         [SADB_X_EXT_POLICY]             = (u8) sizeof(struct sadb_x_policy),
 334         [SADB_X_EXT_SA2]                = (u8) sizeof(struct sadb_x_sa2),
 335         [SADB_X_EXT_NAT_T_TYPE]         = (u8) sizeof(struct sadb_x_nat_t_type),
 336         [SADB_X_EXT_NAT_T_SPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
 337         [SADB_X_EXT_NAT_T_DPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
 338         [SADB_X_EXT_NAT_T_OA]           = (u8) sizeof(struct sadb_address),
 339         [SADB_X_EXT_SEC_CTX]            = (u8) sizeof(struct sadb_x_sec_ctx),
 340 };
 341
 342 /* Verify sadb_address_{len,prefixlen} against sa_family.  */
 343 static int verify_address_len(void *p)
 344 {
 345         struct sadb_address *sp = p;
 346         struct sockaddr *addr = (struct sockaddr *)(sp + 1);
 347         struct sockaddr_in *sin;
 348 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 349         struct sockaddr_in6 *sin6;
 350 #endif
 351         int len;
 352
 353         switch (addr->sa_family) {
 354         case AF_INET:
 355                 len  = sizeof(*sp) + sizeof(*sin) + (sizeof(uint64_t) - 1);
 356                 len /= sizeof(uint64_t);
 357                 if (sp->sadb_address_len != len ||
 358                     sp->sadb_address_prefixlen > 32)
 359                         return -EINVAL;
 360                 break;
 361 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 362         case AF_INET6:
 363                 len  = sizeof(*sp) + sizeof(*sin6) + (sizeof(uint64_t) - 1);
 364                 len /= sizeof(uint64_t);
 365                 if (sp->sadb_address_len != len ||
 366                     sp->sadb_address_prefixlen > 128)
 367                         return -EINVAL;
 368                 break;
 369 #endif
 370         default:
 371                 /* It is user using kernel to keep track of security
 372                  * associations for another protocol, such as
 373                  * OSPF/RSVP/RIPV2/MIP.  It is user's job to verify
 374                  * lengths.
 375                  *
 376                  * XXX Actually, association/policy database is not yet
 377                  * XXX able to cope with arbitrary sockaddr families.
 378                  * XXX When it can, remove this -EINVAL.  -DaveM
 379                  */
 380                 return -EINVAL;
 381                 break;
 382         }
 383
 384         return 0;
 385 }
 386
 387 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
 388 {
 389         int len = 0;
 390
 391         len += sizeof(struct sadb_x_sec_ctx);
 392         len += sec_ctx->sadb_x_ctx_len;
 393         len += sizeof(uint64_t) - 1;
 394         len /= sizeof(uint64_t);
 395
 396         return len;
 397 }
 398
 399 static inline int verify_sec_ctx_len(void *p)
 400 {
 401         struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
 402         int len;
 403
 404         if (sec_ctx->sadb_x_ctx_len > PAGE_SIZE)
 405                 return -EINVAL;
 406
 407         len = pfkey_sec_ctx_len(sec_ctx);
 408
 409         if (sec_ctx->sadb_x_sec_len != len)
 410                 return -EINVAL;
 411
 412         return 0;
 413 }
 414
 415 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
 416 {
 417         struct xfrm_user_sec_ctx *uctx = NULL;
 418         int ctx_size = sec_ctx->sadb_x_ctx_len;
 419
 420         uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
 421
 422         if (!uctx)
 423                 return NULL;
 424
 425         uctx->len = pfkey_sec_ctx_len(sec_ctx);
 426         uctx->exttype = sec_ctx->sadb_x_sec_exttype;
 427         uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
 428         uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
 429         uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
 430         memcpy(uctx + 1, sec_ctx + 1,
 431                uctx->ctx_len);
 432
 433         return uctx;
 434 }
 435
 436 static int present_and_same_family(struct sadb_address *src,
 437                                    struct sadb_address *dst)
 438 {
 439         struct sockaddr *s_addr, *d_addr;
 440
 441         if (!src || !dst)
 442                 return 0;
 443
 444         s_addr = (struct sockaddr *)(src + 1);
 445         d_addr = (struct sockaddr *)(dst + 1);
 446         if (s_addr->sa_family != d_addr->sa_family)
 447                 return 0;
 448         if (s_addr->sa_family != AF_INET
 449 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 450             && s_addr->sa_family != AF_INET6
 451 #endif
 452                 )
 453                 return 0;
 454
 455         return 1;
 456 }
 457
 458 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
 459 {
 460         char *p = (char *) hdr;
 461         int len = skb->len;
 462
 463         len -= sizeof(*hdr);
 464         p += sizeof(*hdr);
 465         while (len > 0) {
 466                 struct sadb_ext *ehdr = (struct sadb_ext *) p;
 467                 uint16_t ext_type;
 468                 int ext_len;
 469
 470                 ext_len  = ehdr->sadb_ext_len;
 471                 ext_len *= sizeof(uint64_t);
 472                 ext_type = ehdr->sadb_ext_type;
 473                 if (ext_len < sizeof(uint64_t) ||
 474                     ext_len > len ||
 475                     ext_type == SADB_EXT_RESERVED)
 476                         return -EINVAL;
 477
 478                 if (ext_type <= SADB_EXT_MAX) {
 479                         int min = (int) sadb_ext_min_len[ext_type];
 480                         if (ext_len < min)
 481                                 return -EINVAL;
 482                         if (ext_hdrs[ext_type-1] != NULL)
 483                                 return -EINVAL;
 484                         if (ext_type == SADB_EXT_ADDRESS_SRC ||
 485                             ext_type == SADB_EXT_ADDRESS_DST ||
 486                             ext_type == SADB_EXT_ADDRESS_PROXY ||
 487                             ext_type == SADB_X_EXT_NAT_T_OA) {
 488                                 if (verify_address_len(p))
 489                                         return -EINVAL;
 490                         }
 491                         if (ext_type == SADB_X_EXT_SEC_CTX) {
 492                                 if (verify_sec_ctx_len(p))
 493                                         return -EINVAL;
 494                         }
 495                         ext_hdrs[ext_type-1] = p;
 496                 }
 497                 p   += ext_len;
 498                 len -= ext_len;
 499         }
 500
 501         return 0;
 502 }
 503
 504 static uint16_t
 505 pfkey_satype2proto(uint8_t satype)
 506 {
 507         switch (satype) {
 508         case SADB_SATYPE_UNSPEC:
 509                 return IPSEC_PROTO_ANY;
 510         case SADB_SATYPE_AH:
 511                 return IPPROTO_AH;
 512         case SADB_SATYPE_ESP:
 513                 return IPPROTO_ESP;
 514         case SADB_X_SATYPE_IPCOMP:
 515                 return IPPROTO_COMP;
 516                 break;
 517         default:
 518                 return 0;
 519         }
 520         /* NOTREACHED */
 521 }
 522
 523 static uint8_t
 524 pfkey_proto2satype(uint16_t proto)
 525 {
 526         switch (proto) {
 527         case IPPROTO_AH:
 528                 return SADB_SATYPE_AH;
 529         case IPPROTO_ESP:
 530                 return SADB_SATYPE_ESP;
 531         case IPPROTO_COMP:
 532                 return SADB_X_SATYPE_IPCOMP;
 533                 break;
 534         default:
 535                 return 0;
 536         }
 537         /* NOTREACHED */
 538 }
 539
 540 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
 541  * say specifically 'just raw sockets' as we encode them as 255.
 542  */
 543
 544 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
 545 {
 546         return (proto == IPSEC_PROTO_ANY ? 0 : proto);
 547 }
 548
 549 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
 550 {
 551         return (proto ? proto : IPSEC_PROTO_ANY);
 552 }
 553
 554 static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
 555                                      xfrm_address_t *xaddr)
 556 {
 557         switch (((struct sockaddr*)(addr + 1))->sa_family) {
 558         case AF_INET:
 559                 xaddr->a4 =
 560                         ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
 561                 return AF_INET;
 562 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 563         case AF_INET6:
 564                 memcpy(xaddr->a6,
 565                        &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
 566                        sizeof(struct in6_addr));
 567                 return AF_INET6;
 568 #endif
 569         default:
 570                 return 0;
 571         }
 572         /* NOTREACHED */
 573 }
 574
 575 static struct  xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
 576 {
 577         struct sadb_sa *sa;
 578         struct sadb_address *addr;
 579         uint16_t proto;
 580         unsigned short family;
 581         xfrm_address_t *xaddr;
 582
 583         sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
 584         if (sa == NULL)
 585                 return NULL;
 586
 587         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
 588         if (proto == 0)
 589                 return NULL;
 590
 591         /* sadb_address_len should be checked by caller */
 592         addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
 593         if (addr == NULL)
 594                 return NULL;
 595
 596         family = ((struct sockaddr *)(addr + 1))->sa_family;
 597         switch (family) {
 598         case AF_INET:
 599                 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
 600                 break;
 601 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 602         case AF_INET6:
 603                 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
 604                 break;
 605 #endif
 606         default:
 607                 xaddr = NULL;
 608         }
 609
 610         if (!xaddr)
 611                 return NULL;
 612
 613         return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
 614 }
 615
 616 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
 617 static int
 618 pfkey_sockaddr_size(sa_family_t family)
 619 {
 620         switch (family) {
 621         case AF_INET:
 622                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
 623 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 624         case AF_INET6:
 625                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
 626 #endif
 627         default:
 628                 return 0;
 629         }
 630         /* NOTREACHED */
 631 }
 632
 633 static inline int pfkey_mode_from_xfrm(int mode)
 634 {
 635         switch(mode) {
 636         case XFRM_MODE_TRANSPORT:
 637                 return IPSEC_MODE_TRANSPORT;
 638         case XFRM_MODE_TUNNEL:
 639                 return IPSEC_MODE_TUNNEL;
 640         case XFRM_MODE_BEET:
 641                 return IPSEC_MODE_BEET;
 642         default:
 643                 return -1;
 644         }
 645 }
 646
 647 static inline int pfkey_mode_to_xfrm(int mode)
 648 {
 649         switch(mode) {
 650         case IPSEC_MODE_ANY:    /*XXX*/
 651         case IPSEC_MODE_TRANSPORT:
 652                 return XFRM_MODE_TRANSPORT;
 653         case IPSEC_MODE_TUNNEL:
 654                 return XFRM_MODE_TUNNEL;
 655         case IPSEC_MODE_BEET:
 656                 return XFRM_MODE_BEET;
 657         default:
 658                 return -1;
 659         }
 660 }
 661
 662 static struct sk_buff * pfkey_xfrm_state2msg(struct xfrm_state *x, int add_keys, int hsc)
 663 {
 664         struct sk_buff *skb;
 665         struct sadb_msg *hdr;
 666         struct sadb_sa *sa;
 667         struct sadb_lifetime *lifetime;
 668         struct sadb_address *addr;
 669         struct sadb_key *key;
 670         struct sadb_x_sa2 *sa2;
 671         struct sockaddr_in *sin;
 672         struct sadb_x_sec_ctx *sec_ctx;
 673         struct xfrm_sec_ctx *xfrm_ctx;
 674         int ctx_size = 0;
 675 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 676         struct sockaddr_in6 *sin6;
 677 #endif
 678         int size;
 679         int auth_key_size = 0;
 680         int encrypt_key_size = 0;
 681         int sockaddr_size;
 682         struct xfrm_encap_tmpl *natt = NULL;
 683         int mode;
 684
 685         /* address family check */
 686         sockaddr_size = pfkey_sockaddr_size(x->props.family);
 687         if (!sockaddr_size)
 688                 return ERR_PTR(-EINVAL);
 689
 690         /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
 691            key(AE), (identity(SD),) (sensitivity)> */
 692         size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
 693                 sizeof(struct sadb_lifetime) +
 694                 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
 695                 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
 696                         sizeof(struct sadb_address)*2 +
 697                                 sockaddr_size*2 +
 698                                         sizeof(struct sadb_x_sa2);
 699
 700         if ((xfrm_ctx = x->security)) {
 701                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
 702                 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
 703         }
 704
 705         /* identity & sensitivity */
 706
 707         if ((x->props.family == AF_INET &&
 708              x->sel.saddr.a4 != x->props.saddr.a4)
 709 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 710             || (x->props.family == AF_INET6 &&
 711                 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
 712 #endif
 713                 )
 714                 size += sizeof(struct sadb_address) + sockaddr_size;
 715
 716         if (add_keys) {
 717                 if (x->aalg && x->aalg->alg_key_len) {
 718                         auth_key_size =
 719                                 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
 720                         size += sizeof(struct sadb_key) + auth_key_size;
 721                 }
 722                 if (x->ealg && x->ealg->alg_key_len) {
 723                         encrypt_key_size =
 724                                 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
 725                         size += sizeof(struct sadb_key) + encrypt_key_size;
 726                 }
 727         }
 728         if (x->encap)
 729                 natt = x->encap;
 730
 731         if (natt && natt->encap_type) {
 732                 size += sizeof(struct sadb_x_nat_t_type);
 733                 size += sizeof(struct sadb_x_nat_t_port);
 734                 size += sizeof(struct sadb_x_nat_t_port);
 735         }
 736
 737         skb =  alloc_skb(size + 16, GFP_ATOMIC);
 738         if (skb == NULL)
 739                 return ERR_PTR(-ENOBUFS);
 740
 741         /* call should fill header later */
 742         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
 743         memset(hdr, 0, size);   /* XXX do we need this ? */
 744         hdr->sadb_msg_len = size / sizeof(uint64_t);
 745
 746         /* sa */
 747         sa = (struct sadb_sa *)  skb_put(skb, sizeof(struct sadb_sa));
 748         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
 749         sa->sadb_sa_exttype = SADB_EXT_SA;
 750         sa->sadb_sa_spi = x->id.spi;
 751         sa->sadb_sa_replay = x->props.replay_window;
 752         switch (x->km.state) {
 753         case XFRM_STATE_VALID:
 754                 sa->sadb_sa_state = x->km.dying ?
 755                         SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
 756                 break;
 757         case XFRM_STATE_ACQ:
 758                 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
 759                 break;
 760         default:
 761                 sa->sadb_sa_state = SADB_SASTATE_DEAD;
 762                 break;
 763         }
 764         sa->sadb_sa_auth = 0;
 765         if (x->aalg) {
 766                 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
 767                 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
 768         }
 769         sa->sadb_sa_encrypt = 0;
 770         BUG_ON(x->ealg && x->calg);
 771         if (x->ealg) {
 772                 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
 773                 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
 774         }
 775         /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
 776         if (x->calg) {
 777                 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
 778                 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
 779         }
 780
 781         sa->sadb_sa_flags = 0;
 782         if (x->props.flags & XFRM_STATE_NOECN)
 783                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
 784         if (x->props.flags & XFRM_STATE_DECAP_DSCP)
 785                 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
 786         if (x->props.flags & XFRM_STATE_NOPMTUDISC)
 787                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
 788
 789         /* hard time */
 790         if (hsc & 2) {
 791                 lifetime = (struct sadb_lifetime *)  skb_put(skb,
 792                                                              sizeof(struct sadb_lifetime));
 793                 lifetime->sadb_lifetime_len =
 794                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 795                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
 796                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.hard_packet_limit);
 797                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
 798                 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
 799                 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
 800         }
 801         /* soft time */
 802         if (hsc & 1) {
 803                 lifetime = (struct sadb_lifetime *)  skb_put(skb,
 804                                                              sizeof(struct sadb_lifetime));
 805                 lifetime->sadb_lifetime_len =
 806                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 807                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
 808                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.soft_packet_limit);
 809                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
 810                 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
 811                 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
 812         }
 813         /* current time */
 814         lifetime = (struct sadb_lifetime *)  skb_put(skb,
 815                                                      sizeof(struct sadb_lifetime));
 816         lifetime->sadb_lifetime_len =
 817                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 818         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
 819         lifetime->sadb_lifetime_allocations = x->curlft.packets;
 820         lifetime->sadb_lifetime_bytes = x->curlft.bytes;
 821         lifetime->sadb_lifetime_addtime = x->curlft.add_time;
 822         lifetime->sadb_lifetime_usetime = x->curlft.use_time;
 823         /* src address */
 824         addr = (struct sadb_address*) skb_put(skb,
 825                                               sizeof(struct sadb_address)+sockaddr_size);
 826         addr->sadb_address_len =
 827                 (sizeof(struct sadb_address)+sockaddr_size)/
 828                         sizeof(uint64_t);
 829         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
 830         /* "if the ports are non-zero, then the sadb_address_proto field,
 831            normally zero, MUST be filled in with the transport
 832            protocol's number." - RFC2367 */
 833         addr->sadb_address_proto = 0;
 834         addr->sadb_address_reserved = 0;
 835         if (x->props.family == AF_INET) {
 836                 addr->sadb_address_prefixlen = 32;
 837
 838                 sin = (struct sockaddr_in *) (addr + 1);
 839                 sin->sin_family = AF_INET;
 840                 sin->sin_addr.s_addr = x->props.saddr.a4;
 841                 sin->sin_port = 0;
 842                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
 843         }
 844 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 845         else if (x->props.family == AF_INET6) {
 846                 addr->sadb_address_prefixlen = 128;
 847
 848                 sin6 = (struct sockaddr_in6 *) (addr + 1);
 849                 sin6->sin6_family = AF_INET6;
 850                 sin6->sin6_port = 0;
 851                 sin6->sin6_flowinfo = 0;
 852                 memcpy(&sin6->sin6_addr, x->props.saddr.a6,
 853                        sizeof(struct in6_addr));
 854                 sin6->sin6_scope_id = 0;
 855         }
 856 #endif
 857         else
 858                 BUG();
 859
 860         /* dst address */
 861         addr = (struct sadb_address*) skb_put(skb,
 862                                               sizeof(struct sadb_address)+sockaddr_size);
 863         addr->sadb_address_len =
 864                 (sizeof(struct sadb_address)+sockaddr_size)/
 865                         sizeof(uint64_t);
 866         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
 867         addr->sadb_address_proto = 0;
 868         addr->sadb_address_prefixlen = 32; /* XXX */
 869         addr->sadb_address_reserved = 0;
 870         if (x->props.family == AF_INET) {
 871                 sin = (struct sockaddr_in *) (addr + 1);
 872                 sin->sin_family = AF_INET;
 873                 sin->sin_addr.s_addr = x->id.daddr.a4;
 874                 sin->sin_port = 0;
 875                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
 876
 877                 if (x->sel.saddr.a4 != x->props.saddr.a4) {
 878                         addr = (struct sadb_address*) skb_put(skb,
 879                                 sizeof(struct sadb_address)+sockaddr_size);
 880                         addr->sadb_address_len =
 881                                 (sizeof(struct sadb_address)+sockaddr_size)/
 882                                 sizeof(uint64_t);
 883                         addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
 884                         addr->sadb_address_proto =
 885                                 pfkey_proto_from_xfrm(x->sel.proto);
 886                         addr->sadb_address_prefixlen = x->sel.prefixlen_s;
 887                         addr->sadb_address_reserved = 0;
 888
 889                         sin = (struct sockaddr_in *) (addr + 1);
 890                         sin->sin_family = AF_INET;
 891                         sin->sin_addr.s_addr = x->sel.saddr.a4;
 892                         sin->sin_port = x->sel.sport;
 893                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
 894                 }
 895         }
 896 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 897         else if (x->props.family == AF_INET6) {
 898                 addr->sadb_address_prefixlen = 128;
 899
 900                 sin6 = (struct sockaddr_in6 *) (addr + 1);
 901                 sin6->sin6_family = AF_INET6;
 902                 sin6->sin6_port = 0;
 903                 sin6->sin6_flowinfo = 0;
 904                 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
 905                 sin6->sin6_scope_id = 0;
 906
 907                 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
 908                             sizeof(struct in6_addr))) {
 909                         addr = (struct sadb_address *) skb_put(skb,
 910                                 sizeof(struct sadb_address)+sockaddr_size);
 911                         addr->sadb_address_len =
 912                                 (sizeof(struct sadb_address)+sockaddr_size)/
 913                                 sizeof(uint64_t);
 914                         addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
 915                         addr->sadb_address_proto =
 916                                 pfkey_proto_from_xfrm(x->sel.proto);
 917                         addr->sadb_address_prefixlen = x->sel.prefixlen_s;
 918                         addr->sadb_address_reserved = 0;
 919
 920                         sin6 = (struct sockaddr_in6 *) (addr + 1);
 921                         sin6->sin6_family = AF_INET6;
 922                         sin6->sin6_port = x->sel.sport;
 923                         sin6->sin6_flowinfo = 0;
 924                         memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
 925                                sizeof(struct in6_addr));
 926                         sin6->sin6_scope_id = 0;
 927                 }
 928         }
 929 #endif
 930         else
 931                 BUG();
 932
 933         /* auth key */
 934         if (add_keys && auth_key_size) {
 935                 key = (struct sadb_key *) skb_put(skb,
 936                                                   sizeof(struct sadb_key)+auth_key_size);
 937                 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
 938                         sizeof(uint64_t);
 939                 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
 940                 key->sadb_key_bits = x->aalg->alg_key_len;
 941                 key->sadb_key_reserved = 0;
 942                 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
 943         }
 944         /* encrypt key */
 945         if (add_keys && encrypt_key_size) {
 946                 key = (struct sadb_key *) skb_put(skb,
 947                                                   sizeof(struct sadb_key)+encrypt_key_size);
 948                 key->sadb_key_len = (sizeof(struct sadb_key) +
 949                                      encrypt_key_size) / sizeof(uint64_t);
 950                 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
 951                 key->sadb_key_bits = x->ealg->alg_key_len;
 952                 key->sadb_key_reserved = 0;
 953                 memcpy(key + 1, x->ealg->alg_key,
 954                        (x->ealg->alg_key_len+7)/8);
 955         }
 956
 957         /* sa */
 958         sa2 = (struct sadb_x_sa2 *)  skb_put(skb, sizeof(struct sadb_x_sa2));
 959         sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
 960         sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
 961         if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
 962                 kfree_skb(skb);
 963                 return ERR_PTR(-EINVAL);
 964         }
 965         sa2->sadb_x_sa2_mode = mode;
 966         sa2->sadb_x_sa2_reserved1 = 0;
 967         sa2->sadb_x_sa2_reserved2 = 0;
 968         sa2->sadb_x_sa2_sequence = 0;
 969         sa2->sadb_x_sa2_reqid = x->props.reqid;
 970
 971         if (natt && natt->encap_type) {
 972                 struct sadb_x_nat_t_type *n_type;
 973                 struct sadb_x_nat_t_port *n_port;
 974
 975                 /* type */
 976                 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
 977                 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
 978                 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
 979                 n_type->sadb_x_nat_t_type_type = natt->encap_type;
 980                 n_type->sadb_x_nat_t_type_reserved[0] = 0;
 981                 n_type->sadb_x_nat_t_type_reserved[1] = 0;
 982                 n_type->sadb_x_nat_t_type_reserved[2] = 0;
 983
 984                 /* source port */
 985                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
 986                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
 987                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
 988                 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
 989                 n_port->sadb_x_nat_t_port_reserved = 0;
 990
 991                 /* dest port */
 992                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
 993                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
 994                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
 995                 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
 996                 n_port->sadb_x_nat_t_port_reserved = 0;
 997         }
 998
 999         /* security context */
1000         if (xfrm_ctx) {
1001                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
1002                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1003                 sec_ctx->sadb_x_sec_len =
1004                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1005                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1006                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1007                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1008                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1009                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1010                        xfrm_ctx->ctx_len);
1011         }
1012
1013         return skb;
1014 }
1015
1016 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1017                                                 void **ext_hdrs)
1018 {
1019         struct xfrm_state *x;
1020         struct sadb_lifetime *lifetime;
1021         struct sadb_sa *sa;
1022         struct sadb_key *key;
1023         struct sadb_x_sec_ctx *sec_ctx;
1024         uint16_t proto;
1025         int err;
1026
1027
1028         sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1029         if (!sa ||
1030             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1031                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1032                 return ERR_PTR(-EINVAL);
1033         if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1034             !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1035                 return ERR_PTR(-EINVAL);
1036         if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1037             !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1038                 return ERR_PTR(-EINVAL);
1039         if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1040             !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1041                 return ERR_PTR(-EINVAL);
1042
1043         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1044         if (proto == 0)
1045                 return ERR_PTR(-EINVAL);
1046
1047         /* default error is no buffer space */
1048         err = -ENOBUFS;
1049
1050         /* RFC2367:
1051
1052    Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1053    SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1054    sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1055    Therefore, the sadb_sa_state field of all submitted SAs MUST be
1056    SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1057    not true.
1058
1059            However, KAME setkey always uses SADB_SASTATE_LARVAL.
1060            Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1061          */
1062         if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1063             (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1064              sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1065             sa->sadb_sa_encrypt > SADB_EALG_MAX)
1066                 return ERR_PTR(-EINVAL);
1067         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1068         if (key != NULL &&
1069             sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1070             ((key->sadb_key_bits+7) / 8 == 0 ||
1071              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1072                 return ERR_PTR(-EINVAL);
1073         key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1074         if (key != NULL &&
1075             sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1076             ((key->sadb_key_bits+7) / 8 == 0 ||
1077              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1078                 return ERR_PTR(-EINVAL);
1079
1080         x = xfrm_state_alloc();
1081         if (x == NULL)
1082                 return ERR_PTR(-ENOBUFS);
1083
1084         x->id.proto = proto;
1085         x->id.spi = sa->sadb_sa_spi;
1086         x->props.replay_window = sa->sadb_sa_replay;
1087         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1088                 x->props.flags |= XFRM_STATE_NOECN;
1089         if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1090                 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1091         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1092                 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1093
1094         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1095         if (lifetime != NULL) {
1096                 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1097                 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1098                 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1099                 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1100         }
1101         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1102         if (lifetime != NULL) {
1103                 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1104                 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1105                 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1106                 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1107         }
1108
1109         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1110         if (sec_ctx != NULL) {
1111                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1112
1113                 if (!uctx)
1114                         goto out;
1115
1116                 err = security_xfrm_state_alloc(x, uctx);
1117                 kfree(uctx);
1118
1119                 if (err)
1120                         goto out;
1121         }
1122
1123         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1124         if (sa->sadb_sa_auth) {
1125                 int keysize = 0;
1126                 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1127                 if (!a) {
1128                         err = -ENOSYS;
1129                         goto out;
1130                 }
1131                 if (key)
1132                         keysize = (key->sadb_key_bits + 7) / 8;
1133                 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1134                 if (!x->aalg)
1135                         goto out;
1136                 strcpy(x->aalg->alg_name, a->name);
1137                 x->aalg->alg_key_len = 0;
1138                 if (key) {
1139                         x->aalg->alg_key_len = key->sadb_key_bits;
1140                         memcpy(x->aalg->alg_key, key+1, keysize);
1141                 }
1142                 x->props.aalgo = sa->sadb_sa_auth;
1143                 /* x->algo.flags = sa->sadb_sa_flags; */
1144         }
1145         if (sa->sadb_sa_encrypt) {
1146                 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1147                         struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1148                         if (!a) {
1149                                 err = -ENOSYS;
1150                                 goto out;
1151                         }
1152                         x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1153                         if (!x->calg)
1154                                 goto out;
1155                         strcpy(x->calg->alg_name, a->name);
1156                         x->props.calgo = sa->sadb_sa_encrypt;
1157                 } else {
1158                         int keysize = 0;
1159                         struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1160                         if (!a) {
1161                                 err = -ENOSYS;
1162                                 goto out;
1163                         }
1164                         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1165                         if (key)
1166                                 keysize = (key->sadb_key_bits + 7) / 8;
1167                         x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1168                         if (!x->ealg)
1169                                 goto out;
1170                         strcpy(x->ealg->alg_name, a->name);
1171                         x->ealg->alg_key_len = 0;
1172                         if (key) {
1173                                 x->ealg->alg_key_len = key->sadb_key_bits;
1174                                 memcpy(x->ealg->alg_key, key+1, keysize);
1175                         }
1176                         x->props.ealgo = sa->sadb_sa_encrypt;
1177                 }
1178         }
1179         /* x->algo.flags = sa->sadb_sa_flags; */
1180
1181         x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1182                                                     &x->props.saddr);
1183         if (!x->props.family) {
1184                 err = -EAFNOSUPPORT;
1185                 goto out;
1186         }
1187         pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1188                                   &x->id.daddr);
1189
1190         if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1191                 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1192                 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1193                 if (mode < 0) {
1194                         err = -EINVAL;
1195                         goto out;
1196                 }
1197                 x->props.mode = mode;
1198                 x->props.reqid = sa2->sadb_x_sa2_reqid;
1199         }
1200
1201         if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1202                 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1203
1204                 /* Nobody uses this, but we try. */
1205                 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1206                 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1207         }
1208
1209         if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1210                 struct sadb_x_nat_t_type* n_type;
1211                 struct xfrm_encap_tmpl *natt;
1212
1213                 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1214                 if (!x->encap)
1215                         goto out;
1216
1217                 natt = x->encap;
1218                 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1219                 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1220
1221                 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1222                         struct sadb_x_nat_t_port* n_port =
1223                                 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1224                         natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1225                 }
1226                 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1227                         struct sadb_x_nat_t_port* n_port =
1228                                 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1229                         natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1230                 }
1231         }
1232
1233         err = xfrm_init_state(x);
1234         if (err)
1235                 goto out;
1236
1237         x->km.seq = hdr->sadb_msg_seq;
1238         return x;
1239
1240 out:
1241         x->km.state = XFRM_STATE_DEAD;
1242         xfrm_state_put(x);
1243         return ERR_PTR(err);
1244 }
1245
1246 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1247 {
1248         return -EOPNOTSUPP;
1249 }
1250
1251 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1252 {
1253         struct sk_buff *resp_skb;
1254         struct sadb_x_sa2 *sa2;
1255         struct sadb_address *saddr, *daddr;
1256         struct sadb_msg *out_hdr;
1257         struct xfrm_state *x = NULL;
1258         int mode;
1259         u32 reqid;
1260         u8 proto;
1261         unsigned short family;
1262         xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1263
1264         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1265                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1266                 return -EINVAL;
1267
1268         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1269         if (proto == 0)
1270                 return -EINVAL;
1271
1272         if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1273                 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1274                 if (mode < 0)
1275                         return -EINVAL;
1276                 reqid = sa2->sadb_x_sa2_reqid;
1277         } else {
1278                 mode = 0;
1279                 reqid = 0;
1280         }
1281
1282         saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1283         daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1284
1285         family = ((struct sockaddr *)(saddr + 1))->sa_family;
1286         switch (family) {
1287         case AF_INET:
1288                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1289                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1290                 break;
1291 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1292         case AF_INET6:
1293                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1294                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1295                 break;
1296 #endif
1297         }
1298
1299         if (hdr->sadb_msg_seq) {
1300                 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1301                 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1302                         xfrm_state_put(x);
1303                         x = NULL;
1304                 }
1305         }
1306
1307         if (!x)
1308                 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1309
1310         if (x == NULL)
1311                 return -ENOENT;
1312
1313         resp_skb = ERR_PTR(-ENOENT);
1314
1315         spin_lock_bh(&x->lock);
1316         if (x->km.state != XFRM_STATE_DEAD) {
1317                 struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1318                 u32 min_spi, max_spi;
1319
1320                 if (range != NULL) {
1321                         min_spi = range->sadb_spirange_min;
1322                         max_spi = range->sadb_spirange_max;
1323                 } else {
1324                         min_spi = 0x100;
1325                         max_spi = 0x0fffffff;
1326                 }
1327                 xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi));
1328                 if (x->id.spi)
1329                         resp_skb = pfkey_xfrm_state2msg(x, 0, 3);
1330         }
1331         spin_unlock_bh(&x->lock);
1332
1333         if (IS_ERR(resp_skb)) {
1334                 xfrm_state_put(x);
1335                 return  PTR_ERR(resp_skb);
1336         }
1337
1338         out_hdr = (struct sadb_msg *) resp_skb->data;
1339         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1340         out_hdr->sadb_msg_type = SADB_GETSPI;
1341         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1342         out_hdr->sadb_msg_errno = 0;
1343         out_hdr->sadb_msg_reserved = 0;
1344         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1345         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1346
1347         xfrm_state_put(x);
1348
1349         pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1350
1351         return 0;
1352 }
1353
1354 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1355 {
1356         struct xfrm_state *x;
1357
1358         if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1359                 return -EOPNOTSUPP;
1360
1361         if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1362                 return 0;
1363
1364         x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1365         if (x == NULL)
1366                 return 0;
1367
1368         spin_lock_bh(&x->lock);
1369         if (x->km.state == XFRM_STATE_ACQ) {
1370                 x->km.state = XFRM_STATE_ERROR;
1371                 wake_up(&km_waitq);
1372         }
1373         spin_unlock_bh(&x->lock);
1374         xfrm_state_put(x);
1375         return 0;
1376 }
1377
1378 static inline int event2poltype(int event)
1379 {
1380         switch (event) {
1381         case XFRM_MSG_DELPOLICY:
1382                 return SADB_X_SPDDELETE;
1383         case XFRM_MSG_NEWPOLICY:
1384                 return SADB_X_SPDADD;
1385         case XFRM_MSG_UPDPOLICY:
1386                 return SADB_X_SPDUPDATE;
1387         case XFRM_MSG_POLEXPIRE:
1388         //      return SADB_X_SPDEXPIRE;
1389         default:
1390                 printk("pfkey: Unknown policy event %d\n", event);
1391                 break;
1392         }
1393
1394         return 0;
1395 }
1396
1397 static inline int event2keytype(int event)
1398 {
1399         switch (event) {
1400         case XFRM_MSG_DELSA:
1401                 return SADB_DELETE;
1402         case XFRM_MSG_NEWSA:
1403                 return SADB_ADD;
1404         case XFRM_MSG_UPDSA:
1405                 return SADB_UPDATE;
1406         case XFRM_MSG_EXPIRE:
1407                 return SADB_EXPIRE;
1408         default:
1409                 printk("pfkey: Unknown SA event %d\n", event);
1410                 break;
1411         }
1412
1413         return 0;
1414 }
1415
1416 /* ADD/UPD/DEL */
1417 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1418 {
1419         struct sk_buff *skb;
1420         struct sadb_msg *hdr;
1421         int hsc = 3;
1422
1423         if (c->event == XFRM_MSG_DELSA)
1424                 hsc = 0;
1425
1426         skb = pfkey_xfrm_state2msg(x, 0, hsc);
1427
1428         if (IS_ERR(skb))
1429                 return PTR_ERR(skb);
1430
1431         hdr = (struct sadb_msg *) skb->data;
1432         hdr->sadb_msg_version = PF_KEY_V2;
1433         hdr->sadb_msg_type = event2keytype(c->event);
1434         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1435         hdr->sadb_msg_errno = 0;
1436         hdr->sadb_msg_reserved = 0;
1437         hdr->sadb_msg_seq = c->seq;
1438         hdr->sadb_msg_pid = c->pid;
1439
1440         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1441
1442         return 0;
1443 }
1444
1445 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1446 {
1447         struct xfrm_state *x;
1448         int err;
1449         struct km_event c;
1450
1451         x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1452         if (IS_ERR(x))
1453                 return PTR_ERR(x);
1454
1455         xfrm_state_hold(x);
1456         if (hdr->sadb_msg_type == SADB_ADD)
1457                 err = xfrm_state_add(x);
1458         else
1459                 err = xfrm_state_update(x);
1460
1461         xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
1462                        AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x);
1463
1464         if (err < 0) {
1465                 x->km.state = XFRM_STATE_DEAD;
1466                 __xfrm_state_put(x);
1467                 goto out;
1468         }
1469
1470         if (hdr->sadb_msg_type == SADB_ADD)
1471                 c.event = XFRM_MSG_NEWSA;
1472         else
1473                 c.event = XFRM_MSG_UPDSA;
1474         c.seq = hdr->sadb_msg_seq;
1475         c.pid = hdr->sadb_msg_pid;
1476         km_state_notify(x, &c);
1477 out:
1478         xfrm_state_put(x);
1479         return err;
1480 }
1481
1482 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1483 {
1484         struct xfrm_state *x;
1485         struct km_event c;
1486         int err;
1487
1488         if (!ext_hdrs[SADB_EXT_SA-1] ||
1489             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1490                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1491                 return -EINVAL;
1492
1493         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1494         if (x == NULL)
1495                 return -ESRCH;
1496
1497         if ((err = security_xfrm_state_delete(x)))
1498                 goto out;
1499
1500         if (xfrm_state_kern(x)) {
1501                 err = -EPERM;
1502                 goto out;
1503         }
1504
1505         err = xfrm_state_delete(x);
1506
1507         if (err < 0)
1508                 goto out;
1509
1510         c.seq = hdr->sadb_msg_seq;
1511         c.pid = hdr->sadb_msg_pid;
1512         c.event = XFRM_MSG_DELSA;
1513         km_state_notify(x, &c);
1514 out:
1515         xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
1516                        AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x);
1517         xfrm_state_put(x);
1518
1519         return err;
1520 }
1521
1522 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1523 {
1524         __u8 proto;
1525         struct sk_buff *out_skb;
1526         struct sadb_msg *out_hdr;
1527         struct xfrm_state *x;
1528
1529         if (!ext_hdrs[SADB_EXT_SA-1] ||
1530             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1531                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1532                 return -EINVAL;
1533
1534         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1535         if (x == NULL)
1536                 return -ESRCH;
1537
1538         out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1539         proto = x->id.proto;
1540         xfrm_state_put(x);
1541         if (IS_ERR(out_skb))
1542                 return  PTR_ERR(out_skb);
1543
1544         out_hdr = (struct sadb_msg *) out_skb->data;
1545         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1546         out_hdr->sadb_msg_type = SADB_DUMP;
1547         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1548         out_hdr->sadb_msg_errno = 0;
1549         out_hdr->sadb_msg_reserved = 0;
1550         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1551         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1552         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1553
1554         return 0;
1555 }
1556
1557 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1558                                               gfp_t allocation)
1559 {
1560         struct sk_buff *skb;
1561         struct sadb_msg *hdr;
1562         int len, auth_len, enc_len, i;
1563
1564         auth_len = xfrm_count_auth_supported();
1565         if (auth_len) {
1566                 auth_len *= sizeof(struct sadb_alg);
1567                 auth_len += sizeof(struct sadb_supported);
1568         }
1569
1570         enc_len = xfrm_count_enc_supported();
1571         if (enc_len) {
1572                 enc_len *= sizeof(struct sadb_alg);
1573                 enc_len += sizeof(struct sadb_supported);
1574         }
1575
1576         len = enc_len + auth_len + sizeof(struct sadb_msg);
1577
1578         skb = alloc_skb(len + 16, allocation);
1579         if (!skb)
1580                 goto out_put_algs;
1581
1582         hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1583         pfkey_hdr_dup(hdr, orig);
1584         hdr->sadb_msg_errno = 0;
1585         hdr->sadb_msg_len = len / sizeof(uint64_t);
1586
1587         if (auth_len) {
1588                 struct sadb_supported *sp;
1589                 struct sadb_alg *ap;
1590
1591                 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1592                 ap = (struct sadb_alg *) (sp + 1);
1593
1594                 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1595                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1596
1597                 for (i = 0; ; i++) {
1598                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1599                         if (!aalg)
1600                                 break;
1601                         if (aalg->available)
1602                                 *ap++ = aalg->desc;
1603                 }
1604         }
1605
1606         if (enc_len) {
1607                 struct sadb_supported *sp;
1608                 struct sadb_alg *ap;
1609
1610                 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1611                 ap = (struct sadb_alg *) (sp + 1);
1612
1613                 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1614                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1615
1616                 for (i = 0; ; i++) {
1617                         struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1618                         if (!ealg)
1619                                 break;
1620                         if (ealg->available)
1621                                 *ap++ = ealg->desc;
1622                 }
1623         }
1624
1625 out_put_algs:
1626         return skb;
1627 }
1628
1629 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1630 {
1631         struct pfkey_sock *pfk = pfkey_sk(sk);
1632         struct sk_buff *supp_skb;
1633
1634         if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1635                 return -EINVAL;
1636
1637         if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1638                 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1639                         return -EEXIST;
1640                 pfk->registered |= (1<<hdr->sadb_msg_satype);
1641         }
1642
1643         xfrm_probe_algs();
1644
1645         supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1646         if (!supp_skb) {
1647                 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1648                         pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1649
1650                 return -ENOBUFS;
1651         }
1652
1653         pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1654
1655         return 0;
1656 }
1657
1658 static int key_notify_sa_flush(struct km_event *c)
1659 {
1660         struct sk_buff *skb;
1661         struct sadb_msg *hdr;
1662
1663         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1664         if (!skb)
1665                 return -ENOBUFS;
1666         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1667         hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1668         hdr->sadb_msg_type = SADB_FLUSH;
1669         hdr->sadb_msg_seq = c->seq;
1670         hdr->sadb_msg_pid = c->pid;
1671         hdr->sadb_msg_version = PF_KEY_V2;
1672         hdr->sadb_msg_errno = (uint8_t) 0;
1673         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1674
1675         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1676
1677         return 0;
1678 }
1679
1680 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1681 {
1682         unsigned proto;
1683         struct km_event c;
1684         struct xfrm_audit audit_info;
1685         int err;
1686
1687         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1688         if (proto == 0)
1689                 return -EINVAL;
1690
1691         audit_info.loginuid = audit_get_loginuid(current->audit_context);
1692         audit_info.secid = 0;
1693         err = xfrm_state_flush(proto, &audit_info);
1694         if (err)
1695                 return err;
1696         c.data.proto = proto;
1697         c.seq = hdr->sadb_msg_seq;
1698         c.pid = hdr->sadb_msg_pid;
1699         c.event = XFRM_MSG_FLUSHSA;
1700         km_state_notify(NULL, &c);
1701
1702         return 0;
1703 }
1704
1705 struct pfkey_dump_data
1706 {
1707         struct sk_buff *skb;
1708         struct sadb_msg *hdr;
1709         struct sock *sk;
1710 };
1711
1712 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1713 {
1714         struct pfkey_dump_data *data = ptr;
1715         struct sk_buff *out_skb;
1716         struct sadb_msg *out_hdr;
1717
1718         out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1719         if (IS_ERR(out_skb))
1720                 return PTR_ERR(out_skb);
1721
1722         out_hdr = (struct sadb_msg *) out_skb->data;
1723         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1724         out_hdr->sadb_msg_type = SADB_DUMP;
1725         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1726         out_hdr->sadb_msg_errno = 0;
1727         out_hdr->sadb_msg_reserved = 0;
1728         out_hdr->sadb_msg_seq = count;
1729         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1730         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1731         return 0;
1732 }
1733
1734 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1735 {
1736         u8 proto;
1737         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1738
1739         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1740         if (proto == 0)
1741                 return -EINVAL;
1742
1743         return xfrm_state_walk(proto, dump_sa, &data);
1744 }
1745
1746 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1747 {
1748         struct pfkey_sock *pfk = pfkey_sk(sk);
1749         int satype = hdr->sadb_msg_satype;
1750
1751         if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1752                 /* XXX we mangle packet... */
1753                 hdr->sadb_msg_errno = 0;
1754                 if (satype != 0 && satype != 1)
1755                         return -EINVAL;
1756                 pfk->promisc = satype;
1757         }
1758         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1759         return 0;
1760 }
1761
1762 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1763 {
1764         int i;
1765         u32 reqid = *(u32*)ptr;
1766
1767         for (i=0; i<xp->xfrm_nr; i++) {
1768                 if (xp->xfrm_vec[i].reqid == reqid)
1769                         return -EEXIST;
1770         }
1771         return 0;
1772 }
1773
1774 static u32 gen_reqid(void)
1775 {
1776         u32 start;
1777         static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1778
1779         start = reqid;
1780         do {
1781                 ++reqid;
1782                 if (reqid == 0)
1783                         reqid = IPSEC_MANUAL_REQID_MAX+1;
1784                 if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid,
1785                                      (void*)&reqid) != -EEXIST)
1786                         return reqid;
1787         } while (reqid != start);
1788         return 0;
1789 }
1790
1791 static int
1792 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1793 {
1794         struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1795         struct sockaddr_in *sin;
1796 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1797         struct sockaddr_in6 *sin6;
1798 #endif
1799         int mode;
1800
1801         if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1802                 return -ELOOP;
1803
1804         if (rq->sadb_x_ipsecrequest_mode == 0)
1805                 return -EINVAL;
1806
1807         t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1808         if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1809                 return -EINVAL;
1810         t->mode = mode;
1811         if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1812                 t->optional = 1;
1813         else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1814                 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1815                 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1816                         t->reqid = 0;
1817                 if (!t->reqid && !(t->reqid = gen_reqid()))
1818                         return -ENOBUFS;
1819         }
1820
1821         /* addresses present only in tunnel mode */
1822         if (t->mode == XFRM_MODE_TUNNEL) {
1823                 struct sockaddr *sa;
1824                 sa = (struct sockaddr *)(rq+1);
1825                 switch(sa->sa_family) {
1826                 case AF_INET:
1827                         sin = (struct sockaddr_in*)sa;
1828                         t->saddr.a4 = sin->sin_addr.s_addr;
1829                         sin++;
1830                         if (sin->sin_family != AF_INET)
1831                                 return -EINVAL;
1832                         t->id.daddr.a4 = sin->sin_addr.s_addr;
1833                         break;
1834 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1835                 case AF_INET6:
1836                         sin6 = (struct sockaddr_in6*)sa;
1837                         memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1838                         sin6++;
1839                         if (sin6->sin6_family != AF_INET6)
1840                                 return -EINVAL;
1841                         memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1842                         break;
1843 #endif
1844                 default:
1845                         return -EINVAL;
1846                 }
1847                 t->encap_family = sa->sa_family;
1848         } else
1849                 t->encap_family = xp->family;
1850
1851         /* No way to set this via kame pfkey */
1852         t->aalgos = t->ealgos = t->calgos = ~0;
1853         xp->xfrm_nr++;
1854         return 0;
1855 }
1856
1857 static int
1858 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1859 {
1860         int err;
1861         int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1862         struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1863
1864         while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1865                 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1866                         return err;
1867                 len -= rq->sadb_x_ipsecrequest_len;
1868                 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1869         }
1870         return 0;
1871 }
1872
1873 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1874 {
1875   struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1876
1877         if (xfrm_ctx) {
1878                 int len = sizeof(struct sadb_x_sec_ctx);
1879                 len += xfrm_ctx->ctx_len;
1880                 return PFKEY_ALIGN8(len);
1881         }
1882         return 0;
1883 }
1884
1885 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1886 {
1887         struct xfrm_tmpl *t;
1888         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1889         int socklen = 0;
1890         int i;
1891
1892         for (i=0; i<xp->xfrm_nr; i++) {
1893                 t = xp->xfrm_vec + i;
1894                 socklen += (t->encap_family == AF_INET ?
1895                             sizeof(struct sockaddr_in) :
1896                             sizeof(struct sockaddr_in6));
1897         }
1898
1899         return sizeof(struct sadb_msg) +
1900                 (sizeof(struct sadb_lifetime) * 3) +
1901                 (sizeof(struct sadb_address) * 2) +
1902                 (sockaddr_size * 2) +
1903                 sizeof(struct sadb_x_policy) +
1904                 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1905                 (socklen * 2) +
1906                 pfkey_xfrm_policy2sec_ctx_size(xp);
1907 }
1908
1909 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1910 {
1911         struct sk_buff *skb;
1912         int size;
1913
1914         size = pfkey_xfrm_policy2msg_size(xp);
1915
1916         skb =  alloc_skb(size + 16, GFP_ATOMIC);
1917         if (skb == NULL)
1918                 return ERR_PTR(-ENOBUFS);
1919
1920         return skb;
1921 }
1922
1923 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1924 {
1925         struct sadb_msg *hdr;
1926         struct sadb_address *addr;
1927         struct sadb_lifetime *lifetime;
1928         struct sadb_x_policy *pol;
1929         struct sockaddr_in   *sin;
1930         struct sadb_x_sec_ctx *sec_ctx;
1931         struct xfrm_sec_ctx *xfrm_ctx;
1932 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1933         struct sockaddr_in6  *sin6;
1934 #endif
1935         int i;
1936         int size;
1937         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1938         int socklen = (xp->family == AF_INET ?
1939                        sizeof(struct sockaddr_in) :
1940                        sizeof(struct sockaddr_in6));
1941
1942         size = pfkey_xfrm_policy2msg_size(xp);
1943
1944         /* call should fill header later */
1945         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1946         memset(hdr, 0, size);   /* XXX do we need this ? */
1947
1948         /* src address */
1949         addr = (struct sadb_address*) skb_put(skb,
1950                                               sizeof(struct sadb_address)+sockaddr_size);
1951         addr->sadb_address_len =
1952                 (sizeof(struct sadb_address)+sockaddr_size)/
1953                         sizeof(uint64_t);
1954         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1955         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1956         addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1957         addr->sadb_address_reserved = 0;
1958         /* src address */
1959         if (xp->family == AF_INET) {
1960                 sin = (struct sockaddr_in *) (addr + 1);
1961                 sin->sin_family = AF_INET;
1962                 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1963                 sin->sin_port = xp->selector.sport;
1964                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1965         }
1966 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1967         else if (xp->family == AF_INET6) {
1968                 sin6 = (struct sockaddr_in6 *) (addr + 1);
1969                 sin6->sin6_family = AF_INET6;
1970                 sin6->sin6_port = xp->selector.sport;
1971                 sin6->sin6_flowinfo = 0;
1972                 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1973                        sizeof(struct in6_addr));
1974                 sin6->sin6_scope_id = 0;
1975         }
1976 #endif
1977         else
1978                 BUG();
1979
1980         /* dst address */
1981         addr = (struct sadb_address*) skb_put(skb,
1982                                               sizeof(struct sadb_address)+sockaddr_size);
1983         addr->sadb_address_len =
1984                 (sizeof(struct sadb_address)+sockaddr_size)/
1985                         sizeof(uint64_t);
1986         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1987         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1988         addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1989         addr->sadb_address_reserved = 0;
1990         if (xp->family == AF_INET) {
1991                 sin = (struct sockaddr_in *) (addr + 1);
1992                 sin->sin_family = AF_INET;
1993                 sin->sin_addr.s_addr = xp->selector.daddr.a4;
1994                 sin->sin_port = xp->selector.dport;
1995                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1996         }
1997 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1998         else if (xp->family == AF_INET6) {
1999                 sin6 = (struct sockaddr_in6 *) (addr + 1);
2000                 sin6->sin6_family = AF_INET6;
2001                 sin6->sin6_port = xp->selector.dport;
2002                 sin6->sin6_flowinfo = 0;
2003                 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2004                        sizeof(struct in6_addr));
2005                 sin6->sin6_scope_id = 0;
2006         }
2007 #endif
2008         else
2009                 BUG();
2010
2011         /* hard time */
2012         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2013                                                      sizeof(struct sadb_lifetime));
2014         lifetime->sadb_lifetime_len =
2015                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2016         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2017         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.hard_packet_limit);
2018         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2019         lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2020         lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2021         /* soft time */
2022         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2023                                                      sizeof(struct sadb_lifetime));
2024         lifetime->sadb_lifetime_len =
2025                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2026         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2027         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.soft_packet_limit);
2028         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2029         lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2030         lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2031         /* current time */
2032         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2033                                                      sizeof(struct sadb_lifetime));
2034         lifetime->sadb_lifetime_len =
2035                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2036         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2037         lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2038         lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2039         lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2040         lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2041
2042         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
2043         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2044         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2045         pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2046         if (xp->action == XFRM_POLICY_ALLOW) {
2047                 if (xp->xfrm_nr)
2048                         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2049                 else
2050                         pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2051         }
2052         pol->sadb_x_policy_dir = dir+1;
2053         pol->sadb_x_policy_id = xp->index;
2054         pol->sadb_x_policy_priority = xp->priority;
2055
2056         for (i=0; i<xp->xfrm_nr; i++) {
2057                 struct sadb_x_ipsecrequest *rq;
2058                 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2059                 int req_size;
2060                 int mode;
2061
2062                 req_size = sizeof(struct sadb_x_ipsecrequest);
2063                 if (t->mode == XFRM_MODE_TUNNEL)
2064                         req_size += ((t->encap_family == AF_INET ?
2065                                      sizeof(struct sockaddr_in) :
2066                                      sizeof(struct sockaddr_in6)) * 2);
2067                 else
2068                         size -= 2*socklen;
2069                 rq = (void*)skb_put(skb, req_size);
2070                 pol->sadb_x_policy_len += req_size/8;
2071                 memset(rq, 0, sizeof(*rq));
2072                 rq->sadb_x_ipsecrequest_len = req_size;
2073                 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2074                 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2075                         return -EINVAL;
2076                 rq->sadb_x_ipsecrequest_mode = mode;
2077                 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2078                 if (t->reqid)
2079                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2080                 if (t->optional)
2081                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2082                 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2083                 if (t->mode == XFRM_MODE_TUNNEL) {
2084                         switch (t->encap_family) {
2085                         case AF_INET:
2086                                 sin = (void*)(rq+1);
2087                                 sin->sin_family = AF_INET;
2088                                 sin->sin_addr.s_addr = t->saddr.a4;
2089                                 sin->sin_port = 0;
2090                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2091                                 sin++;
2092                                 sin->sin_family = AF_INET;
2093                                 sin->sin_addr.s_addr = t->id.daddr.a4;
2094                                 sin->sin_port = 0;
2095                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2096                                 break;
2097 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2098                         case AF_INET6:
2099                                 sin6 = (void*)(rq+1);
2100                                 sin6->sin6_family = AF_INET6;
2101                                 sin6->sin6_port = 0;
2102                                 sin6->sin6_flowinfo = 0;
2103                                 memcpy(&sin6->sin6_addr, t->saddr.a6,
2104                                        sizeof(struct in6_addr));
2105                                 sin6->sin6_scope_id = 0;
2106
2107                                 sin6++;
2108                                 sin6->sin6_family = AF_INET6;
2109                                 sin6->sin6_port = 0;
2110                                 sin6->sin6_flowinfo = 0;
2111                                 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2112                                        sizeof(struct in6_addr));
2113                                 sin6->sin6_scope_id = 0;
2114                                 break;
2115 #endif
2116                         default:
2117                                 break;
2118                         }
2119                 }
2120         }
2121
2122         /* security context */
2123         if ((xfrm_ctx = xp->security)) {
2124                 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2125
2126                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2127                 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2128                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2129                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2130                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2131                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2132                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2133                        xfrm_ctx->ctx_len);
2134         }
2135
2136         hdr->sadb_msg_len = size / sizeof(uint64_t);
2137         hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2138
2139         return 0;
2140 }
2141
2142 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2143 {
2144         struct sk_buff *out_skb;
2145         struct sadb_msg *out_hdr;
2146         int err;
2147
2148         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2149         if (IS_ERR(out_skb)) {
2150                 err = PTR_ERR(out_skb);
2151                 goto out;
2152         }
2153         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2154         if (err < 0)
2155                 return err;
2156
2157         out_hdr = (struct sadb_msg *) out_skb->data;
2158         out_hdr->sadb_msg_version = PF_KEY_V2;
2159
2160         if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2161                 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2162         else
2163                 out_hdr->sadb_msg_type = event2poltype(c->event);
2164         out_hdr->sadb_msg_errno = 0;
2165         out_hdr->sadb_msg_seq = c->seq;
2166         out_hdr->sadb_msg_pid = c->pid;
2167         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2168 out:
2169         return 0;
2170
2171 }
2172
2173 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2174 {
2175         int err = 0;
2176         struct sadb_lifetime *lifetime;
2177         struct sadb_address *sa;
2178         struct sadb_x_policy *pol;
2179         struct xfrm_policy *xp;
2180         struct km_event c;
2181         struct sadb_x_sec_ctx *sec_ctx;
2182
2183         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2184                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2185             !ext_hdrs[SADB_X_EXT_POLICY-1])
2186                 return -EINVAL;
2187
2188         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2189         if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2190                 return -EINVAL;
2191         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2192                 return -EINVAL;
2193
2194         xp = xfrm_policy_alloc(GFP_KERNEL);
2195         if (xp == NULL)
2196                 return -ENOBUFS;
2197
2198         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2199                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2200         xp->priority = pol->sadb_x_policy_priority;
2201
2202         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2203         xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2204         if (!xp->family) {
2205                 err = -EINVAL;
2206                 goto out;
2207         }
2208         xp->selector.family = xp->family;
2209         xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2210         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2211         xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2212         if (xp->selector.sport)
2213                 xp->selector.sport_mask = htons(0xffff);
2214
2215         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2216         pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2217         xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2218
2219         /* Amusing, we set this twice.  KAME apps appear to set same value
2220          * in both addresses.
2221          */
2222         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2223
2224         xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2225         if (xp->selector.dport)
2226                 xp->selector.dport_mask = htons(0xffff);
2227
2228         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2229         if (sec_ctx != NULL) {
2230                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2231
2232                 if (!uctx) {
2233                         err = -ENOBUFS;
2234                         goto out;
2235                 }
2236
2237                 err = security_xfrm_policy_alloc(xp, uctx);
2238                 kfree(uctx);
2239
2240                 if (err)
2241                         goto out;
2242         }
2243
2244         xp->lft.soft_byte_limit = XFRM_INF;
2245         xp->lft.hard_byte_limit = XFRM_INF;
2246         xp->lft.soft_packet_limit = XFRM_INF;
2247         xp->lft.hard_packet_limit = XFRM_INF;
2248         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2249                 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2250                 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2251                 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2252                 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2253         }
2254         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2255                 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2256                 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2257                 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2258                 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2259         }
2260         xp->xfrm_nr = 0;
2261         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2262             (err = parse_ipsecrequests(xp, pol)) < 0)
2263                 goto out;
2264
2265         err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2266                                  hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2267
2268         xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2269                        AUDIT_MAC_IPSEC_ADDSPD, err ? 0 : 1, xp, NULL);
2270
2271         if (err)
2272                 goto out;
2273
2274         if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2275                 c.event = XFRM_MSG_UPDPOLICY;
2276         else
2277                 c.event = XFRM_MSG_NEWPOLICY;
2278
2279         c.seq = hdr->sadb_msg_seq;
2280         c.pid = hdr->sadb_msg_pid;
2281
2282         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2283         xfrm_pol_put(xp);
2284         return 0;
2285
2286 out:
2287         security_xfrm_policy_free(xp);
2288         kfree(xp);
2289         return err;
2290 }
2291
2292 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2293 {
2294         int err;
2295         struct sadb_address *sa;
2296         struct sadb_x_policy *pol;
2297         struct xfrm_policy *xp, tmp;
2298         struct xfrm_selector sel;
2299         struct km_event c;
2300         struct sadb_x_sec_ctx *sec_ctx;
2301
2302         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2303                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2304             !ext_hdrs[SADB_X_EXT_POLICY-1])
2305                 return -EINVAL;
2306
2307         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2308         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2309                 return -EINVAL;
2310
2311         memset(&sel, 0, sizeof(sel));
2312
2313         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2314         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2315         sel.prefixlen_s = sa->sadb_address_prefixlen;
2316         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2317         sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2318         if (sel.sport)
2319                 sel.sport_mask = htons(0xffff);
2320
2321         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2322         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2323         sel.prefixlen_d = sa->sadb_address_prefixlen;
2324         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2325         sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2326         if (sel.dport)
2327                 sel.dport_mask = htons(0xffff);
2328
2329         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2330         memset(&tmp, 0, sizeof(struct xfrm_policy));
2331
2332         if (sec_ctx != NULL) {
2333                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2334
2335                 if (!uctx)
2336                         return -ENOMEM;
2337
2338                 err = security_xfrm_policy_alloc(&tmp, uctx);
2339                 kfree(uctx);
2340
2341                 if (err)
2342                         return err;
2343         }
2344
2345         xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
2346                                    &sel, tmp.security, 1, &err);
2347         security_xfrm_policy_free(&tmp);
2348
2349         if (xp == NULL)
2350                 return -ENOENT;
2351
2352         xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2353                        AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
2354
2355         if (err)
2356                 goto out;
2357
2358         c.seq = hdr->sadb_msg_seq;
2359         c.pid = hdr->sadb_msg_pid;
2360         c.event = XFRM_MSG_DELPOLICY;
2361         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2362
2363 out:
2364         xfrm_pol_put(xp);
2365         return err;
2366 }
2367
2368 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2369 {
2370         int err;
2371         struct sk_buff *out_skb;
2372         struct sadb_msg *out_hdr;
2373         err = 0;
2374
2375         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2376         if (IS_ERR(out_skb)) {
2377                 err =  PTR_ERR(out_skb);
2378                 goto out;
2379         }
2380         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2381         if (err < 0)
2382                 goto out;
2383
2384         out_hdr = (struct sadb_msg *) out_skb->data;
2385         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2386         out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2387         out_hdr->sadb_msg_satype = 0;
2388         out_hdr->sadb_msg_errno = 0;
2389         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2390         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2391         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2392         err = 0;
2393
2394 out:
2395         return err;
2396 }
2397
2398 #ifdef CONFIG_NET_KEY_MIGRATE
2399 static int pfkey_sockaddr_pair_size(sa_family_t family)
2400 {
2401         switch (family) {
2402         case AF_INET:
2403                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2404 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2405         case AF_INET6:
2406                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2407 #endif
2408         default:
2409                 return 0;
2410         }
2411         /* NOTREACHED */
2412 }
2413
2414 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2415                                xfrm_address_t *saddr, xfrm_address_t *daddr,
2416                                u16 *family)
2417 {
2418         struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2419         if (rq->sadb_x_ipsecrequest_len <
2420             pfkey_sockaddr_pair_size(sa->sa_family))
2421                 return -EINVAL;
2422
2423         switch (sa->sa_family) {
2424         case AF_INET:
2425                 {
2426                         struct sockaddr_in *sin;
2427                         sin = (struct sockaddr_in *)sa;
2428                         if ((sin+1)->sin_family != AF_INET)
2429                                 return -EINVAL;
2430                         memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2431                         sin++;
2432                         memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2433                         *family = AF_INET;
2434                         break;
2435                 }
2436 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2437         case AF_INET6:
2438                 {
2439                         struct sockaddr_in6 *sin6;
2440                         sin6 = (struct sockaddr_in6 *)sa;
2441                         if ((sin6+1)->sin6_family != AF_INET6)
2442                                 return -EINVAL;
2443                         memcpy(&saddr->a6, &sin6->sin6_addr,
2444                                sizeof(saddr->a6));
2445                         sin6++;
2446                         memcpy(&daddr->a6, &sin6->sin6_addr,
2447                                sizeof(daddr->a6));
2448                         *family = AF_INET6;
2449                         break;
2450                 }
2451 #endif
2452         default:
2453                 return -EINVAL;
2454         }
2455
2456         return 0;
2457 }
2458
2459 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2460                                     struct xfrm_migrate *m)
2461 {
2462         int err;
2463         struct sadb_x_ipsecrequest *rq2;
2464         int mode;
2465
2466         if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2467             len < rq1->sadb_x_ipsecrequest_len)
2468                 return -EINVAL;
2469
2470         /* old endoints */
2471         err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2472                                   &m->old_family);
2473         if (err)
2474                 return err;
2475
2476         rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2477         len -= rq1->sadb_x_ipsecrequest_len;
2478
2479         if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2480             len < rq2->sadb_x_ipsecrequest_len)
2481                 return -EINVAL;
2482
2483         /* new endpoints */
2484         err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2485                                   &m->new_family);
2486         if (err)
2487                 return err;
2488
2489         if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2490             rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2491             rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2492                 return -EINVAL;
2493
2494         m->proto = rq1->sadb_x_ipsecrequest_proto;
2495         if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2496                 return -EINVAL;
2497         m->mode = mode;
2498         m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2499
2500         return ((int)(rq1->sadb_x_ipsecrequest_len +
2501                       rq2->sadb_x_ipsecrequest_len));
2502 }
2503
2504 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2505                          struct sadb_msg *hdr, void **ext_hdrs)
2506 {
2507         int i, len, ret, err = -EINVAL;
2508         u8 dir;
2509         struct sadb_address *sa;
2510         struct sadb_x_policy *pol;
2511         struct sadb_x_ipsecrequest *rq;
2512         struct xfrm_selector sel;
2513         struct xfrm_migrate m[XFRM_MAX_DEPTH];
2514
2515         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2516             ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2517             !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2518                 err = -EINVAL;
2519                 goto out;
2520         }
2521
2522         pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2523         if (!pol) {
2524                 err = -EINVAL;
2525                 goto out;
2526         }
2527
2528         if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2529                 err = -EINVAL;
2530                 goto out;
2531         }
2532
2533         dir = pol->sadb_x_policy_dir - 1;
2534         memset(&sel, 0, sizeof(sel));
2535
2536         /* set source address info of selector */
2537         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2538         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2539         sel.prefixlen_s = sa->sadb_address_prefixlen;
2540         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2541         sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2542         if (sel.sport)
2543                 sel.sport_mask = ~0;
2544
2545         /* set destination address info of selector */
2546         sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2547         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2548         sel.prefixlen_d = sa->sadb_address_prefixlen;
2549         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2550         sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2551         if (sel.dport)
2552                 sel.dport_mask = ~0;
2553
2554         rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2555
2556         /* extract ipsecrequests */
2557         i = 0;
2558         len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2559
2560         while (len > 0 && i < XFRM_MAX_DEPTH) {
2561                 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2562                 if (ret < 0) {
2563                         err = ret;
2564                         goto out;
2565                 } else {
2566                         rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2567                         len -= ret;
2568                         i++;
2569                 }
2570         }
2571
2572         if (!i || len > 0) {
2573                 err = -EINVAL;
2574                 goto out;
2575         }
2576
2577         return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2578
2579  out:
2580         return err;
2581 }
2582 #else
2583 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2584                          struct sadb_msg *hdr, void **ext_hdrs)
2585 {
2586         return -ENOPROTOOPT;
2587 }
2588 #endif
2589
2590
2591 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2592 {
2593         unsigned int dir;
2594         int err = 0, delete;
2595         struct sadb_x_policy *pol;
2596         struct xfrm_policy *xp;
2597         struct km_event c;
2598
2599         if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2600                 return -EINVAL;
2601
2602         dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2603         if (dir >= XFRM_POLICY_MAX)
2604                 return -EINVAL;
2605
2606         delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2607         xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2608                               delete, &err);
2609         if (xp == NULL)
2610                 return -ENOENT;
2611
2612         if (delete) {
2613                 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2614                                AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
2615
2616                 if (err)
2617                         goto out;
2618                 c.seq = hdr->sadb_msg_seq;
2619                 c.pid = hdr->sadb_msg_pid;
2620                 c.data.byid = 1;
2621                 c.event = XFRM_MSG_DELPOLICY;
2622                 km_policy_notify(xp, dir, &c);
2623         } else {
2624                 err = key_pol_get_resp(sk, xp, hdr, dir);
2625         }
2626
2627 out:
2628         xfrm_pol_put(xp);
2629         return err;
2630 }
2631
2632 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2633 {
2634         struct pfkey_dump_data *data = ptr;
2635         struct sk_buff *out_skb;
2636         struct sadb_msg *out_hdr;
2637         int err;
2638
2639         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2640         if (IS_ERR(out_skb))
2641                 return PTR_ERR(out_skb);
2642
2643         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2644         if (err < 0)
2645                 return err;
2646
2647         out_hdr = (struct sadb_msg *) out_skb->data;
2648         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2649         out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2650         out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2651         out_hdr->sadb_msg_errno = 0;
2652         out_hdr->sadb_msg_seq = count;
2653         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2654         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2655         return 0;
2656 }
2657
2658 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2659 {
2660         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2661
2662         return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data);
2663 }
2664
2665 static int key_notify_policy_flush(struct km_event *c)
2666 {
2667         struct sk_buff *skb_out;
2668         struct sadb_msg *hdr;
2669
2670         skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2671         if (!skb_out)
2672                 return -ENOBUFS;
2673         hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2674         hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2675         hdr->sadb_msg_seq = c->seq;
2676         hdr->sadb_msg_pid = c->pid;
2677         hdr->sadb_msg_version = PF_KEY_V2;
2678         hdr->sadb_msg_errno = (uint8_t) 0;
2679         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2680         pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2681         return 0;
2682
2683 }
2684
2685 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2686 {
2687         struct km_event c;
2688         struct xfrm_audit audit_info;
2689         int err;
2690
2691         audit_info.loginuid = audit_get_loginuid(current->audit_context);
2692         audit_info.secid = 0;
2693         err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2694         if (err)
2695                 return err;
2696         c.data.type = XFRM_POLICY_TYPE_MAIN;
2697         c.event = XFRM_MSG_FLUSHPOLICY;
2698         c.pid = hdr->sadb_msg_pid;
2699         c.seq = hdr->sadb_msg_seq;
2700         km_policy_notify(NULL, 0, &c);
2701
2702         return 0;
2703 }
2704
2705 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2706                              struct sadb_msg *hdr, void **ext_hdrs);
2707 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2708         [SADB_RESERVED]         = pfkey_reserved,
2709         [SADB_GETSPI]           = pfkey_getspi,
2710         [SADB_UPDATE]           = pfkey_add,
2711         [SADB_ADD]              = pfkey_add,
2712         [SADB_DELETE]           = pfkey_delete,
2713         [SADB_GET]              = pfkey_get,
2714         [SADB_ACQUIRE]          = pfkey_acquire,
2715         [SADB_REGISTER]         = pfkey_register,
2716         [SADB_EXPIRE]           = NULL,
2717         [SADB_FLUSH]            = pfkey_flush,
2718         [SADB_DUMP]             = pfkey_dump,
2719         [SADB_X_PROMISC]        = pfkey_promisc,
2720         [SADB_X_PCHANGE]        = NULL,
2721         [SADB_X_SPDUPDATE]      = pfkey_spdadd,
2722         [SADB_X_SPDADD]         = pfkey_spdadd,
2723         [SADB_X_SPDDELETE]      = pfkey_spddelete,
2724         [SADB_X_SPDGET]         = pfkey_spdget,
2725         [SADB_X_SPDACQUIRE]     = NULL,
2726         [SADB_X_SPDDUMP]        = pfkey_spddump,
2727         [SADB_X_SPDFLUSH]       = pfkey_spdflush,
2728         [SADB_X_SPDSETIDX]      = pfkey_spdadd,
2729         [SADB_X_SPDDELETE2]     = pfkey_spdget,
2730         [SADB_X_MIGRATE]        = pfkey_migrate,
2731 };
2732
2733 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2734 {
2735         void *ext_hdrs[SADB_EXT_MAX];
2736         int err;
2737
2738         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2739                         BROADCAST_PROMISC_ONLY, NULL);
2740
2741         memset(ext_hdrs, 0, sizeof(ext_hdrs));
2742         err = parse_exthdrs(skb, hdr, ext_hdrs);
2743         if (!err) {
2744                 err = -EOPNOTSUPP;
2745                 if (pfkey_funcs[hdr->sadb_msg_type])
2746                         err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2747         }
2748         return err;
2749 }
2750
2751 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2752 {
2753         struct sadb_msg *hdr = NULL;
2754
2755         if (skb->len < sizeof(*hdr)) {
2756                 *errp = -EMSGSIZE;
2757         } else {
2758                 hdr = (struct sadb_msg *) skb->data;
2759                 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2760                     hdr->sadb_msg_reserved != 0 ||
2761                     (hdr->sadb_msg_type <= SADB_RESERVED ||
2762                      hdr->sadb_msg_type > SADB_MAX)) {
2763                         hdr = NULL;
2764                         *errp = -EINVAL;
2765                 } else if (hdr->sadb_msg_len != (skb->len /
2766                                                  sizeof(uint64_t)) ||
2767                            hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2768                                                 sizeof(uint64_t))) {
2769                         hdr = NULL;
2770                         *errp = -EMSGSIZE;
2771                 } else {
2772                         *errp = 0;
2773                 }
2774         }
2775         return hdr;
2776 }
2777
2778 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2779 {
2780         return t->aalgos & (1 << d->desc.sadb_alg_id);
2781 }
2782
2783 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2784 {
2785         return t->ealgos & (1 << d->desc.sadb_alg_id);
2786 }
2787
2788 static int count_ah_combs(struct xfrm_tmpl *t)
2789 {
2790         int i, sz = 0;
2791
2792         for (i = 0; ; i++) {
2793                 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2794                 if (!aalg)
2795                         break;
2796                 if (aalg_tmpl_set(t, aalg) && aalg->available)
2797                         sz += sizeof(struct sadb_comb);
2798         }
2799         return sz + sizeof(struct sadb_prop);
2800 }
2801
2802 static int count_esp_combs(struct xfrm_tmpl *t)
2803 {
2804         int i, k, sz = 0;
2805
2806         for (i = 0; ; i++) {
2807                 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2808                 if (!ealg)
2809                         break;
2810
2811                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2812                         continue;
2813
2814                 for (k = 1; ; k++) {
2815                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2816                         if (!aalg)
2817                                 break;
2818
2819                         if (aalg_tmpl_set(t, aalg) && aalg->available)
2820                                 sz += sizeof(struct sadb_comb);
2821                 }
2822         }
2823         return sz + sizeof(struct sadb_prop);
2824 }
2825
2826 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2827 {
2828         struct sadb_prop *p;
2829         int i;
2830
2831         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2832         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2833         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2834         p->sadb_prop_replay = 32;
2835         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2836
2837         for (i = 0; ; i++) {
2838                 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2839                 if (!aalg)
2840                         break;
2841
2842                 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2843                         struct sadb_comb *c;
2844                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2845                         memset(c, 0, sizeof(*c));
2846                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2847                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2848                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2849                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2850                         c->sadb_comb_hard_addtime = 24*60*60;
2851                         c->sadb_comb_soft_addtime = 20*60*60;
2852                         c->sadb_comb_hard_usetime = 8*60*60;
2853                         c->sadb_comb_soft_usetime = 7*60*60;
2854                 }
2855         }
2856 }
2857
2858 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2859 {
2860         struct sadb_prop *p;
2861         int i, k;
2862
2863         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2864         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2865         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2866         p->sadb_prop_replay = 32;
2867         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2868
2869         for (i=0; ; i++) {
2870                 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2871                 if (!ealg)
2872                         break;
2873
2874                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2875                         continue;
2876
2877                 for (k = 1; ; k++) {
2878                         struct sadb_comb *c;
2879                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2880                         if (!aalg)
2881                                 break;
2882                         if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2883                                 continue;
2884                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2885                         memset(c, 0, sizeof(*c));
2886                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2887                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2888                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2889                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2890                         c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2891                         c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2892                         c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2893                         c->sadb_comb_hard_addtime = 24*60*60;
2894                         c->sadb_comb_soft_addtime = 20*60*60;
2895                         c->sadb_comb_hard_usetime = 8*60*60;
2896                         c->sadb_comb_soft_usetime = 7*60*60;
2897                 }
2898         }
2899 }
2900
2901 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2902 {
2903         return 0;
2904 }
2905
2906 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2907 {
2908         struct sk_buff *out_skb;
2909         struct sadb_msg *out_hdr;
2910         int hard;
2911         int hsc;
2912
2913         hard = c->data.hard;
2914         if (hard)
2915                 hsc = 2;
2916         else
2917                 hsc = 1;
2918
2919         out_skb = pfkey_xfrm_state2msg(x, 0, hsc);
2920         if (IS_ERR(out_skb))
2921                 return PTR_ERR(out_skb);
2922
2923         out_hdr = (struct sadb_msg *) out_skb->data;
2924         out_hdr->sadb_msg_version = PF_KEY_V2;
2925         out_hdr->sadb_msg_type = SADB_EXPIRE;
2926         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2927         out_hdr->sadb_msg_errno = 0;
2928         out_hdr->sadb_msg_reserved = 0;
2929         out_hdr->sadb_msg_seq = 0;
2930         out_hdr->sadb_msg_pid = 0;
2931
2932         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2933         return 0;
2934 }
2935
2936 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2937 {
2938         switch (c->event) {
2939         case XFRM_MSG_EXPIRE:
2940                 return key_notify_sa_expire(x, c);
2941         case XFRM_MSG_DELSA:
2942         case XFRM_MSG_NEWSA:
2943         case XFRM_MSG_UPDSA:
2944                 return key_notify_sa(x, c);
2945         case XFRM_MSG_FLUSHSA:
2946                 return key_notify_sa_flush(c);
2947         case XFRM_MSG_NEWAE: /* not yet supported */
2948                 break;
2949         default:
2950                 printk("pfkey: Unknown SA event %d\n", c->event);
2951                 break;
2952         }
2953
2954         return 0;
2955 }
2956
2957 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2958 {
2959         if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2960                 return 0;
2961
2962         switch (c->event) {
2963         case XFRM_MSG_POLEXPIRE:
2964                 return key_notify_policy_expire(xp, c);
2965         case XFRM_MSG_DELPOLICY:
2966         case XFRM_MSG_NEWPOLICY:
2967         case XFRM_MSG_UPDPOLICY:
2968                 return key_notify_policy(xp, dir, c);
2969         case XFRM_MSG_FLUSHPOLICY:
2970                 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2971                         break;
2972                 return key_notify_policy_flush(c);
2973         default:
2974                 printk("pfkey: Unknown policy event %d\n", c->event);
2975                 break;
2976         }
2977
2978         return 0;
2979 }
2980
2981 static u32 get_acqseq(void)
2982 {
2983         u32 res;
2984         static u32 acqseq;
2985         static DEFINE_SPINLOCK(acqseq_lock);
2986
2987         spin_lock_bh(&acqseq_lock);
2988         res = (++acqseq ? : ++acqseq);
2989         spin_unlock_bh(&acqseq_lock);
2990         return res;
2991 }
2992
2993 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
2994 {
2995         struct sk_buff *skb;
2996         struct sadb_msg *hdr;
2997         struct sadb_address *addr;
2998         struct sadb_x_policy *pol;
2999         struct sockaddr_in *sin;
3000 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3001         struct sockaddr_in6 *sin6;
3002 #endif
3003         int sockaddr_size;
3004         int size;
3005         struct sadb_x_sec_ctx *sec_ctx;
3006         struct xfrm_sec_ctx *xfrm_ctx;
3007         int ctx_size = 0;
3008
3009         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3010         if (!sockaddr_size)
3011                 return -EINVAL;
3012
3013         size = sizeof(struct sadb_msg) +
3014                 (sizeof(struct sadb_address) * 2) +
3015                 (sockaddr_size * 2) +
3016                 sizeof(struct sadb_x_policy);
3017
3018         if (x->id.proto == IPPROTO_AH)
3019                 size += count_ah_combs(t);
3020         else if (x->id.proto == IPPROTO_ESP)
3021                 size += count_esp_combs(t);
3022
3023         if ((xfrm_ctx = x->security)) {
3024                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3025                 size +=  sizeof(struct sadb_x_sec_ctx) + ctx_size;
3026         }
3027
3028         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3029         if (skb == NULL)
3030                 return -ENOMEM;
3031
3032         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3033         hdr->sadb_msg_version = PF_KEY_V2;
3034         hdr->sadb_msg_type = SADB_ACQUIRE;
3035         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3036         hdr->sadb_msg_len = size / sizeof(uint64_t);
3037         hdr->sadb_msg_errno = 0;
3038         hdr->sadb_msg_reserved = 0;
3039         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3040         hdr->sadb_msg_pid = 0;
3041
3042         /* src address */
3043         addr = (struct sadb_address*) skb_put(skb,
3044                                               sizeof(struct sadb_address)+sockaddr_size);
3045         addr->sadb_address_len =
3046                 (sizeof(struct sadb_address)+sockaddr_size)/
3047                         sizeof(uint64_t);
3048         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3049         addr->sadb_address_proto = 0;
3050         addr->sadb_address_reserved = 0;
3051         if (x->props.family == AF_INET) {
3052                 addr->sadb_address_prefixlen = 32;
3053
3054                 sin = (struct sockaddr_in *) (addr + 1);
3055                 sin->sin_family = AF_INET;
3056                 sin->sin_addr.s_addr = x->props.saddr.a4;
3057                 sin->sin_port = 0;
3058                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3059         }
3060 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3061         else if (x->props.family == AF_INET6) {
3062                 addr->sadb_address_prefixlen = 128;
3063
3064                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3065                 sin6->sin6_family = AF_INET6;
3066                 sin6->sin6_port = 0;
3067                 sin6->sin6_flowinfo = 0;
3068                 memcpy(&sin6->sin6_addr,
3069                        x->props.saddr.a6, sizeof(struct in6_addr));
3070                 sin6->sin6_scope_id = 0;
3071         }
3072 #endif
3073         else
3074                 BUG();
3075
3076         /* dst address */
3077         addr = (struct sadb_address*) skb_put(skb,
3078                                               sizeof(struct sadb_address)+sockaddr_size);
3079         addr->sadb_address_len =
3080                 (sizeof(struct sadb_address)+sockaddr_size)/
3081                         sizeof(uint64_t);
3082         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3083         addr->sadb_address_proto = 0;
3084         addr->sadb_address_reserved = 0;
3085         if (x->props.family == AF_INET) {
3086                 addr->sadb_address_prefixlen = 32;
3087
3088                 sin = (struct sockaddr_in *) (addr + 1);
3089                 sin->sin_family = AF_INET;
3090                 sin->sin_addr.s_addr = x->id.daddr.a4;
3091                 sin->sin_port = 0;
3092                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3093         }
3094 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3095         else if (x->props.family == AF_INET6) {
3096                 addr->sadb_address_prefixlen = 128;
3097
3098                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3099                 sin6->sin6_family = AF_INET6;
3100                 sin6->sin6_port = 0;
3101                 sin6->sin6_flowinfo = 0;
3102                 memcpy(&sin6->sin6_addr,
3103                        x->id.daddr.a6, sizeof(struct in6_addr));
3104                 sin6->sin6_scope_id = 0;
3105         }
3106 #endif
3107         else
3108                 BUG();
3109
3110         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
3111         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3112         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3113         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3114         pol->sadb_x_policy_dir = dir+1;
3115         pol->sadb_x_policy_id = xp->index;
3116
3117         /* Set sadb_comb's. */
3118         if (x->id.proto == IPPROTO_AH)
3119                 dump_ah_combs(skb, t);
3120         else if (x->id.proto == IPPROTO_ESP)
3121                 dump_esp_combs(skb, t);
3122
3123         /* security context */
3124         if (xfrm_ctx) {
3125                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3126                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3127                 sec_ctx->sadb_x_sec_len =
3128                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3129                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3130                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3131                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3132                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3133                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3134                        xfrm_ctx->ctx_len);
3135         }
3136
3137         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3138 }
3139
3140 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3141                                                 u8 *data, int len, int *dir)
3142 {
3143         struct xfrm_policy *xp;
3144         struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3145         struct sadb_x_sec_ctx *sec_ctx;
3146
3147         switch (sk->sk_family) {
3148         case AF_INET:
3149                 if (opt != IP_IPSEC_POLICY) {
3150                         *dir = -EOPNOTSUPP;
3151                         return NULL;
3152                 }
3153                 break;
3154 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3155         case AF_INET6:
3156                 if (opt != IPV6_IPSEC_POLICY) {
3157                         *dir = -EOPNOTSUPP;
3158                         return NULL;
3159                 }
3160                 break;
3161 #endif
3162         default:
3163                 *dir = -EINVAL;
3164                 return NULL;
3165         }
3166
3167         *dir = -EINVAL;
3168
3169         if (len < sizeof(struct sadb_x_policy) ||
3170             pol->sadb_x_policy_len*8 > len ||
3171             pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3172             (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3173                 return NULL;
3174
3175         xp = xfrm_policy_alloc(GFP_ATOMIC);
3176         if (xp == NULL) {
3177                 *dir = -ENOBUFS;
3178                 return NULL;
3179         }
3180
3181         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3182                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3183
3184         xp->lft.soft_byte_limit = XFRM_INF;
3185         xp->lft.hard_byte_limit = XFRM_INF;
3186         xp->lft.soft_packet_limit = XFRM_INF;
3187         xp->lft.hard_packet_limit = XFRM_INF;
3188         xp->family = sk->sk_family;
3189
3190         xp->xfrm_nr = 0;
3191         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3192             (*dir = parse_ipsecrequests(xp, pol)) < 0)
3193                 goto out;
3194
3195         /* security context too */
3196         if (len >= (pol->sadb_x_policy_len*8 +
3197             sizeof(struct sadb_x_sec_ctx))) {
3198                 char *p = (char *)pol;
3199                 struct xfrm_user_sec_ctx *uctx;
3200
3201                 p += pol->sadb_x_policy_len*8;
3202                 sec_ctx = (struct sadb_x_sec_ctx *)p;
3203                 if (len < pol->sadb_x_policy_len*8 +
3204                     sec_ctx->sadb_x_sec_len) {
3205                         *dir = -EINVAL;
3206                         goto out;
3207                 }
3208                 if ((*dir = verify_sec_ctx_len(p)))
3209                         goto out;
3210                 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3211                 *dir = security_xfrm_policy_alloc(xp, uctx);
3212                 kfree(uctx);
3213
3214                 if (*dir)
3215                         goto out;
3216         }
3217
3218         *dir = pol->sadb_x_policy_dir-1;
3219         return xp;
3220
3221 out:
3222         security_xfrm_policy_free(xp);
3223         kfree(xp);
3224         return NULL;
3225 }
3226
3227 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3228 {
3229         struct sk_buff *skb;
3230         struct sadb_msg *hdr;
3231         struct sadb_sa *sa;
3232         struct sadb_address *addr;
3233         struct sadb_x_nat_t_port *n_port;
3234         struct sockaddr_in *sin;
3235 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3236         struct sockaddr_in6 *sin6;
3237 #endif
3238         int sockaddr_size;
3239         int size;
3240         __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3241         struct xfrm_encap_tmpl *natt = NULL;
3242
3243         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3244         if (!sockaddr_size)
3245                 return -EINVAL;
3246
3247         if (!satype)
3248                 return -EINVAL;
3249
3250         if (!x->encap)
3251                 return -EINVAL;
3252
3253         natt = x->encap;
3254
3255         /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3256          *
3257          * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3258          * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3259          */
3260
3261         size = sizeof(struct sadb_msg) +
3262                 sizeof(struct sadb_sa) +
3263                 (sizeof(struct sadb_address) * 2) +
3264                 (sockaddr_size * 2) +
3265                 (sizeof(struct sadb_x_nat_t_port) * 2);
3266
3267         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3268         if (skb == NULL)
3269                 return -ENOMEM;
3270
3271         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3272         hdr->sadb_msg_version = PF_KEY_V2;
3273         hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3274         hdr->sadb_msg_satype = satype;
3275         hdr->sadb_msg_len = size / sizeof(uint64_t);
3276         hdr->sadb_msg_errno = 0;
3277         hdr->sadb_msg_reserved = 0;
3278         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3279         hdr->sadb_msg_pid = 0;
3280
3281         /* SA */
3282         sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3283         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3284         sa->sadb_sa_exttype = SADB_EXT_SA;
3285         sa->sadb_sa_spi = x->id.spi;
3286         sa->sadb_sa_replay = 0;
3287         sa->sadb_sa_state = 0;
3288         sa->sadb_sa_auth = 0;
3289         sa->sadb_sa_encrypt = 0;
3290         sa->sadb_sa_flags = 0;
3291
3292         /* ADDRESS_SRC (old addr) */
3293         addr = (struct sadb_address*)
3294                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3295         addr->sadb_address_len =
3296                 (sizeof(struct sadb_address)+sockaddr_size)/
3297                         sizeof(uint64_t);
3298         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3299         addr->sadb_address_proto = 0;
3300         addr->sadb_address_reserved = 0;
3301         if (x->props.family == AF_INET) {
3302                 addr->sadb_address_prefixlen = 32;
3303
3304                 sin = (struct sockaddr_in *) (addr + 1);
3305                 sin->sin_family = AF_INET;
3306                 sin->sin_addr.s_addr = x->props.saddr.a4;
3307                 sin->sin_port = 0;
3308                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3309         }
3310 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3311         else if (x->props.family == AF_INET6) {
3312                 addr->sadb_address_prefixlen = 128;
3313
3314                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3315                 sin6->sin6_family = AF_INET6;
3316                 sin6->sin6_port = 0;
3317                 sin6->sin6_flowinfo = 0;
3318                 memcpy(&sin6->sin6_addr,
3319                        x->props.saddr.a6, sizeof(struct in6_addr));
3320                 sin6->sin6_scope_id = 0;
3321         }
3322 #endif
3323         else
3324                 BUG();
3325
3326         /* NAT_T_SPORT (old port) */
3327         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3328         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3329         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3330         n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3331         n_port->sadb_x_nat_t_port_reserved = 0;
3332
3333         /* ADDRESS_DST (new addr) */
3334         addr = (struct sadb_address*)
3335                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3336         addr->sadb_address_len =
3337                 (sizeof(struct sadb_address)+sockaddr_size)/
3338                         sizeof(uint64_t);
3339         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3340         addr->sadb_address_proto = 0;
3341         addr->sadb_address_reserved = 0;
3342         if (x->props.family == AF_INET) {
3343                 addr->sadb_address_prefixlen = 32;
3344
3345                 sin = (struct sockaddr_in *) (addr + 1);
3346                 sin->sin_family = AF_INET;
3347                 sin->sin_addr.s_addr = ipaddr->a4;
3348                 sin->sin_port = 0;
3349                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3350         }
3351 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3352         else if (x->props.family == AF_INET6) {
3353                 addr->sadb_address_prefixlen = 128;
3354
3355                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3356                 sin6->sin6_family = AF_INET6;
3357                 sin6->sin6_port = 0;
3358                 sin6->sin6_flowinfo = 0;
3359                 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3360                 sin6->sin6_scope_id = 0;
3361         }
3362 #endif
3363         else
3364                 BUG();
3365
3366         /* NAT_T_DPORT (new port) */
3367         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3368         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3369         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3370         n_port->sadb_x_nat_t_port_port = sport;
3371         n_port->sadb_x_nat_t_port_reserved = 0;
3372
3373         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3374 }
3375
3376 #ifdef CONFIG_NET_KEY_MIGRATE
3377 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3378                             struct xfrm_selector *sel)
3379 {
3380         struct sadb_address *addr;
3381         struct sockaddr_in *sin;
3382 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3383         struct sockaddr_in6 *sin6;
3384 #endif
3385         addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3386         addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3387         addr->sadb_address_exttype = type;
3388         addr->sadb_address_proto = sel->proto;
3389         addr->sadb_address_reserved = 0;
3390
3391         switch (type) {
3392         case SADB_EXT_ADDRESS_SRC:
3393                 if (sel->family == AF_INET) {
3394                         addr->sadb_address_prefixlen = sel->prefixlen_s;
3395                         sin = (struct sockaddr_in *)(addr + 1);
3396                         sin->sin_family = AF_INET;
3397                         memcpy(&sin->sin_addr.s_addr, &sel->saddr,
3398                                sizeof(sin->sin_addr.s_addr));
3399                         sin->sin_port = 0;
3400                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3401                 }
3402 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3403                 else if (sel->family == AF_INET6) {
3404                         addr->sadb_address_prefixlen = sel->prefixlen_s;
3405                         sin6 = (struct sockaddr_in6 *)(addr + 1);
3406                         sin6->sin6_family = AF_INET6;
3407                         sin6->sin6_port = 0;
3408                         sin6->sin6_flowinfo = 0;
3409                         sin6->sin6_scope_id = 0;
3410                         memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr,
3411                                sizeof(sin6->sin6_addr.s6_addr));
3412                 }
3413 #endif
3414                 break;
3415         case SADB_EXT_ADDRESS_DST:
3416                 if (sel->family == AF_INET) {
3417                         addr->sadb_address_prefixlen = sel->prefixlen_d;
3418                         sin = (struct sockaddr_in *)(addr + 1);
3419                         sin->sin_family = AF_INET;
3420                         memcpy(&sin->sin_addr.s_addr, &sel->daddr,
3421                                sizeof(sin->sin_addr.s_addr));
3422                         sin->sin_port = 0;
3423                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3424                 }
3425 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3426                 else if (sel->family == AF_INET6) {
3427                         addr->sadb_address_prefixlen = sel->prefixlen_d;
3428                         sin6 = (struct sockaddr_in6 *)(addr + 1);
3429                         sin6->sin6_family = AF_INET6;
3430                         sin6->sin6_port = 0;
3431                         sin6->sin6_flowinfo = 0;
3432                         sin6->sin6_scope_id = 0;
3433                         memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr,
3434                                sizeof(sin6->sin6_addr.s6_addr));
3435                 }
3436 #endif
3437                 break;
3438         default:
3439                 return -EINVAL;
3440         }
3441
3442         return 0;
3443 }
3444
3445 static int set_ipsecrequest(struct sk_buff *skb,
3446                             uint8_t proto, uint8_t mode, int level,
3447                             uint32_t reqid, uint8_t family,
3448                             xfrm_address_t *src, xfrm_address_t *dst)
3449 {
3450         struct sadb_x_ipsecrequest *rq;
3451         struct sockaddr_in *sin;
3452 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3453         struct sockaddr_in6 *sin6;
3454 #endif
3455         int size_req;
3456
3457         size_req = sizeof(struct sadb_x_ipsecrequest) +
3458                    pfkey_sockaddr_pair_size(family);
3459
3460         rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3461         memset(rq, 0, size_req);
3462         rq->sadb_x_ipsecrequest_len = size_req;
3463         rq->sadb_x_ipsecrequest_proto = proto;
3464         rq->sadb_x_ipsecrequest_mode = mode;
3465         rq->sadb_x_ipsecrequest_level = level;
3466         rq->sadb_x_ipsecrequest_reqid = reqid;
3467
3468         switch (family) {
3469         case AF_INET:
3470                 sin = (struct sockaddr_in *)(rq + 1);
3471                 sin->sin_family = AF_INET;
3472                 memcpy(&sin->sin_addr.s_addr, src,
3473                        sizeof(sin->sin_addr.s_addr));
3474                 sin++;
3475                 sin->sin_family = AF_INET;
3476                 memcpy(&sin->sin_addr.s_addr, dst,
3477                        sizeof(sin->sin_addr.s_addr));
3478                 break;
3479 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3480         case AF_INET6:
3481                 sin6 = (struct sockaddr_in6 *)(rq + 1);
3482                 sin6->sin6_family = AF_INET6;
3483                 sin6->sin6_port = 0;
3484                 sin6->sin6_flowinfo = 0;
3485                 sin6->sin6_scope_id = 0;
3486                 memcpy(&sin6->sin6_addr.s6_addr, src,
3487                        sizeof(sin6->sin6_addr.s6_addr));
3488                 sin6++;
3489                 sin6->sin6_family = AF_INET6;
3490                 sin6->sin6_port = 0;
3491                 sin6->sin6_flowinfo = 0;
3492                 sin6->sin6_scope_id = 0;
3493                 memcpy(&sin6->sin6_addr.s6_addr, dst,
3494                        sizeof(sin6->sin6_addr.s6_addr));
3495                 break;
3496 #endif
3497         default:
3498                 return -EINVAL;
3499         }
3500
3501         return 0;
3502 }
3503 #endif
3504
3505 #ifdef CONFIG_NET_KEY_MIGRATE
3506 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3507                               struct xfrm_migrate *m, int num_bundles)
3508 {
3509         int i;
3510         int sasize_sel;
3511         int size = 0;
3512         int size_pol = 0;
3513         struct sk_buff *skb;
3514         struct sadb_msg *hdr;
3515         struct sadb_x_policy *pol;
3516         struct xfrm_migrate *mp;
3517
3518         if (type != XFRM_POLICY_TYPE_MAIN)
3519                 return 0;
3520
3521         if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3522                 return -EINVAL;
3523
3524         /* selector */
3525         sasize_sel = pfkey_sockaddr_size(sel->family);
3526         if (!sasize_sel)
3527                 return -EINVAL;
3528         size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3529
3530         /* policy info */
3531         size_pol += sizeof(struct sadb_x_policy);
3532
3533         /* ipsecrequests */
3534         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3535                 /* old locator pair */
3536                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3537                             pfkey_sockaddr_pair_size(mp->old_family);
3538                 /* new locator pair */
3539                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3540                             pfkey_sockaddr_pair_size(mp->new_family);
3541         }
3542
3543         size += sizeof(struct sadb_msg) + size_pol;
3544
3545         /* alloc buffer */
3546         skb = alloc_skb(size, GFP_ATOMIC);
3547         if (skb == NULL)
3548                 return -ENOMEM;
3549
3550         hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3551         hdr->sadb_msg_version = PF_KEY_V2;
3552         hdr->sadb_msg_type = SADB_X_MIGRATE;
3553         hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3554         hdr->sadb_msg_len = size / 8;
3555         hdr->sadb_msg_errno = 0;
3556         hdr->sadb_msg_reserved = 0;
3557         hdr->sadb_msg_seq = 0;
3558         hdr->sadb_msg_pid = 0;
3559
3560         /* selector src */
3561         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3562
3563         /* selector dst */
3564         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3565
3566         /* policy information */
3567         pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3568         pol->sadb_x_policy_len = size_pol / 8;
3569         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3570         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3571         pol->sadb_x_policy_dir = dir + 1;
3572         pol->sadb_x_policy_id = 0;
3573         pol->sadb_x_policy_priority = 0;
3574
3575         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3576                 /* old ipsecrequest */
3577                 int mode = pfkey_mode_from_xfrm(mp->mode);
3578                 if (mode < 0)
3579                         return -EINVAL;
3580                 if (set_ipsecrequest(skb, mp->proto, mode,
3581                                      (mp->reqid ?  IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3582                                      mp->reqid, mp->old_family,
3583                                      &mp->old_saddr, &mp->old_daddr) < 0) {
3584                         return -EINVAL;
3585                 }
3586
3587                 /* new ipsecrequest */
3588                 if (set_ipsecrequest(skb, mp->proto, mode,
3589                                      (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3590                                      mp->reqid, mp->new_family,
3591                                      &mp->new_saddr, &mp->new_daddr) < 0) {
3592                         return -EINVAL;
3593                 }
3594         }
3595
3596         /* broadcast migrate message to sockets */
3597         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3598
3599         return 0;
3600 }
3601 #else
3602 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3603                               struct xfrm_migrate *m, int num_bundles)
3604 {
3605         return -ENOPROTOOPT;
3606 }
3607 #endif
3608
3609 static int pfkey_sendmsg(struct kiocb *kiocb,
3610                          struct socket *sock, struct msghdr *msg, size_t len)
3611 {
3612         struct sock *sk = sock->sk;
3613         struct sk_buff *skb = NULL;
3614         struct sadb_msg *hdr = NULL;
3615         int err;
3616
3617         err = -EOPNOTSUPP;
3618         if (msg->msg_flags & MSG_OOB)
3619                 goto out;
3620
3621         err = -EMSGSIZE;
3622         if ((unsigned)len > sk->sk_sndbuf - 32)
3623                 goto out;
3624
3625         err = -ENOBUFS;
3626         skb = alloc_skb(len, GFP_KERNEL);
3627         if (skb == NULL)
3628                 goto out;
3629
3630         err = -EFAULT;
3631         if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3632                 goto out;
3633
3634         hdr = pfkey_get_base_msg(skb, &err);
3635         if (!hdr)
3636                 goto out;
3637
3638         mutex_lock(&xfrm_cfg_mutex);
3639         err = pfkey_process(sk, skb, hdr);
3640         mutex_unlock(&xfrm_cfg_mutex);
3641
3642 out:
3643         if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3644                 err = 0;
3645         if (skb)
3646                 kfree_skb(skb);
3647
3648         return err ? : len;
3649 }
3650
3651 static int pfkey_recvmsg(struct kiocb *kiocb,
3652                          struct socket *sock, struct msghdr *msg, size_t len,
3653                          int flags)
3654 {
3655         struct sock *sk = sock->sk;
3656         struct sk_buff *skb;
3657         int copied, err;
3658
3659         err = -EINVAL;
3660         if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3661                 goto out;
3662
3663         msg->msg_namelen = 0;
3664         skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3665         if (skb == NULL)
3666                 goto out;
3667
3668         copied = skb->len;
3669         if (copied > len) {
3670                 msg->msg_flags |= MSG_TRUNC;
3671                 copied = len;
3672         }
3673
3674         skb_reset_transport_header(skb);
3675         err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3676         if (err)
3677                 goto out_free;
3678
3679         sock_recv_timestamp(msg, sk, skb);
3680
3681         err = (flags & MSG_TRUNC) ? skb->len : copied;
3682
3683 out_free:
3684         skb_free_datagram(sk, skb);
3685 out:
3686         return err;
3687 }
3688
3689 static const struct proto_ops pfkey_ops = {
3690         .family         =       PF_KEY,
3691         .owner          =       THIS_MODULE,
3692         /* Operations that make no sense on pfkey sockets. */
3693         .bind           =       sock_no_bind,
3694         .connect        =       sock_no_connect,
3695         .socketpair     =       sock_no_socketpair,
3696         .accept         =       sock_no_accept,
3697         .getname        =       sock_no_getname,
3698         .ioctl          =       sock_no_ioctl,
3699         .listen         =       sock_no_listen,
3700         .shutdown       =       sock_no_shutdown,
3701         .setsockopt     =       sock_no_setsockopt,
3702         .getsockopt     =       sock_no_getsockopt,
3703         .mmap           =       sock_no_mmap,
3704         .sendpage       =       sock_no_sendpage,
3705
3706         /* Now the operations that really occur. */
3707         .release        =       pfkey_release,
3708         .poll           =       datagram_poll,
3709         .sendmsg        =       pfkey_sendmsg,
3710         .recvmsg        =       pfkey_recvmsg,
3711 };
3712
3713 static struct net_proto_family pfkey_family_ops = {
3714         .family =       PF_KEY,
3715         .create =       pfkey_create,
3716         .owner  =       THIS_MODULE,
3717 };
3718
3719 #ifdef CONFIG_PROC_FS
3720 static int pfkey_read_proc(char *buffer, char **start, off_t offset,
3721                            int length, int *eof, void *data)
3722 {
3723         off_t pos = 0;
3724         off_t begin = 0;
3725         int len = 0;
3726         struct sock *s;
3727         struct hlist_node *node;
3728
3729         len += sprintf(buffer,"sk       RefCnt Rmem   Wmem   User   Inode\n");
3730
3731         read_lock(&pfkey_table_lock);
3732
3733         sk_for_each(s, node, &pfkey_table) {
3734                 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
3735                                s,
3736                                atomic_read(&s->sk_refcnt),
3737                                atomic_read(&s->sk_rmem_alloc),
3738                                atomic_read(&s->sk_wmem_alloc),
3739                                sock_i_uid(s),
3740                                sock_i_ino(s)
3741                                );
3742
3743                 buffer[len++] = '\n';
3744
3745                 pos = begin + len;
3746                 if (pos < offset) {
3747                         len = 0;
3748                         begin = pos;
3749                 }
3750                 if(pos > offset + length)
3751                         goto done;
3752         }
3753         *eof = 1;
3754
3755 done:
3756         read_unlock(&pfkey_table_lock);
3757
3758         *start = buffer + (offset - begin);
3759         len -= (offset - begin);
3760
3761         if (len > length)
3762                 len = length;
3763         if (len < 0)
3764                 len = 0;
3765
3766         return len;
3767 }
3768 #endif
3769
3770 static struct xfrm_mgr pfkeyv2_mgr =
3771 {
3772         .id             = "pfkeyv2",
3773         .notify         = pfkey_send_notify,
3774         .acquire        = pfkey_send_acquire,
3775         .compile_policy = pfkey_compile_policy,
3776         .new_mapping    = pfkey_send_new_mapping,
3777         .notify_policy  = pfkey_send_policy_notify,
3778         .migrate        = pfkey_send_migrate,
3779 };
3780
3781 static void __exit ipsec_pfkey_exit(void)
3782 {
3783         xfrm_unregister_km(&pfkeyv2_mgr);
3784         remove_proc_entry("net/pfkey", NULL);
3785         sock_unregister(PF_KEY);
3786         proto_unregister(&key_proto);
3787 }
3788
3789 static int __init ipsec_pfkey_init(void)
3790 {
3791         int err = proto_register(&key_proto, 0);
3792
3793         if (err != 0)
3794                 goto out;
3795
3796         err = sock_register(&pfkey_family_ops);
3797         if (err != 0)
3798                 goto out_unregister_key_proto;
3799 #ifdef CONFIG_PROC_FS
3800         err = -ENOMEM;
3801         if (create_proc_read_entry("net/pfkey", 0, NULL, pfkey_read_proc, NULL) == NULL)
3802                 goto out_sock_unregister;
3803 #endif
3804         err = xfrm_register_km(&pfkeyv2_mgr);
3805         if (err != 0)
3806                 goto out_remove_proc_entry;
3807 out:
3808         return err;
3809 out_remove_proc_entry:
3810 #ifdef CONFIG_PROC_FS
3811         remove_proc_entry("net/pfkey", NULL);
3812 out_sock_unregister:
3813 #endif
3814         sock_unregister(PF_KEY);
3815 out_unregister_key_proto:
3816         proto_unregister(&key_proto);
3817         goto out;
3818 }
3819
3820 module_init(ipsec_pfkey_init);
3821 module_exit(ipsec_pfkey_exit);
3822 MODULE_LICENSE("GPL");
3823 MODULE_ALIAS_NETPROTO(PF_KEY);