net/key/af_key.c

   1 /*
   2  * net/key/af_key.c     An implementation of PF_KEYv2 sockets.
   3  *
   4  *              This program is free software; you can redistribute it and/or
   5  *              modify it under the terms of the GNU General Public License
   6  *              as published by the Free Software Foundation; either version
   7  *              2 of the License, or (at your option) any later version.
   8  *
   9  * Authors:     Maxim Giryaev   <gem@asplinux.ru>
  10  *              David S. Miller <davem@redhat.com>
  11  *              Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
  12  *              Kunihiro Ishiguro <kunihiro@ipinfusion.com>
  13  *              Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
  14  *              Derek Atkins <derek@ihtfp.com>
  15  */
  16
  17 #include <linux/capability.h>
  18 #include <linux/module.h>
  19 #include <linux/kernel.h>
  20 #include <linux/socket.h>
  21 #include <linux/pfkeyv2.h>
  22 #include <linux/ipsec.h>
  23 #include <linux/skbuff.h>
  24 #include <linux/rtnetlink.h>
  25 #include <linux/in.h>
  26 #include <linux/in6.h>
  27 #include <linux/proc_fs.h>
  28 #include <linux/init.h>
  29 #include <net/net_namespace.h>
  30 #include <net/xfrm.h>
  31
  32 #include <net/sock.h>
  33
  34 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
  35 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
  36
  37
  38 /* List of all pfkey sockets. */
  39 static HLIST_HEAD(pfkey_table);
  40 static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
  41 static DEFINE_RWLOCK(pfkey_table_lock);
  42 static atomic_t pfkey_table_users = ATOMIC_INIT(0);
  43
  44 static atomic_t pfkey_socks_nr = ATOMIC_INIT(0);
  45
  46 struct pfkey_sock {
  47         /* struct sock must be the first member of struct pfkey_sock */
  48         struct sock     sk;
  49         int             registered;
  50         int             promisc;
  51 };
  52
  53 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
  54 {
  55         return (struct pfkey_sock *)sk;
  56 }
  57
  58 static void pfkey_sock_destruct(struct sock *sk)
  59 {
  60         skb_queue_purge(&sk->sk_receive_queue);
  61
  62         if (!sock_flag(sk, SOCK_DEAD)) {
  63                 printk("Attempt to release alive pfkey socket: %p\n", sk);
  64                 return;
  65         }
  66
  67         BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
  68         BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
  69
  70         atomic_dec(&pfkey_socks_nr);
  71 }
  72
  73 static void pfkey_table_grab(void)
  74 {
  75         write_lock_bh(&pfkey_table_lock);
  76
  77         if (atomic_read(&pfkey_table_users)) {
  78                 DECLARE_WAITQUEUE(wait, current);
  79
  80                 add_wait_queue_exclusive(&pfkey_table_wait, &wait);
  81                 for(;;) {
  82                         set_current_state(TASK_UNINTERRUPTIBLE);
  83                         if (atomic_read(&pfkey_table_users) == 0)
  84                                 break;
  85                         write_unlock_bh(&pfkey_table_lock);
  86                         schedule();
  87                         write_lock_bh(&pfkey_table_lock);
  88                 }
  89
  90                 __set_current_state(TASK_RUNNING);
  91                 remove_wait_queue(&pfkey_table_wait, &wait);
  92         }
  93 }
  94
  95 static __inline__ void pfkey_table_ungrab(void)
  96 {
  97         write_unlock_bh(&pfkey_table_lock);
  98         wake_up(&pfkey_table_wait);
  99 }
 100
 101 static __inline__ void pfkey_lock_table(void)
 102 {
 103         /* read_lock() synchronizes us to pfkey_table_grab */
 104
 105         read_lock(&pfkey_table_lock);
 106         atomic_inc(&pfkey_table_users);
 107         read_unlock(&pfkey_table_lock);
 108 }
 109
 110 static __inline__ void pfkey_unlock_table(void)
 111 {
 112         if (atomic_dec_and_test(&pfkey_table_users))
 113                 wake_up(&pfkey_table_wait);
 114 }
 115
 116
 117 static const struct proto_ops pfkey_ops;
 118
 119 static void pfkey_insert(struct sock *sk)
 120 {
 121         pfkey_table_grab();
 122         sk_add_node(sk, &pfkey_table);
 123         pfkey_table_ungrab();
 124 }
 125
 126 static void pfkey_remove(struct sock *sk)
 127 {
 128         pfkey_table_grab();
 129         sk_del_node_init(sk);
 130         pfkey_table_ungrab();
 131 }
 132
 133 static struct proto key_proto = {
 134         .name     = "KEY",
 135         .owner    = THIS_MODULE,
 136         .obj_size = sizeof(struct pfkey_sock),
 137 };
 138
 139 static int pfkey_create(struct net *net, struct socket *sock, int protocol)
 140 {
 141         struct sock *sk;
 142         int err;
 143
 144         if (net != &init_net)
 145                 return -EAFNOSUPPORT;
 146
 147         if (!capable(CAP_NET_ADMIN))
 148                 return -EPERM;
 149         if (sock->type != SOCK_RAW)
 150                 return -ESOCKTNOSUPPORT;
 151         if (protocol != PF_KEY_V2)
 152                 return -EPROTONOSUPPORT;
 153
 154         err = -ENOMEM;
 155         sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto, 1);
 156         if (sk == NULL)
 157                 goto out;
 158
 159         sock->ops = &pfkey_ops;
 160         sock_init_data(sock, sk);
 161
 162         sk->sk_family = PF_KEY;
 163         sk->sk_destruct = pfkey_sock_destruct;
 164
 165         atomic_inc(&pfkey_socks_nr);
 166
 167         pfkey_insert(sk);
 168
 169         return 0;
 170 out:
 171         return err;
 172 }
 173
 174 static int pfkey_release(struct socket *sock)
 175 {
 176         struct sock *sk = sock->sk;
 177
 178         if (!sk)
 179                 return 0;
 180
 181         pfkey_remove(sk);
 182
 183         sock_orphan(sk);
 184         sock->sk = NULL;
 185         skb_queue_purge(&sk->sk_write_queue);
 186         sock_put(sk);
 187
 188         return 0;
 189 }
 190
 191 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
 192                                gfp_t allocation, struct sock *sk)
 193 {
 194         int err = -ENOBUFS;
 195
 196         sock_hold(sk);
 197         if (*skb2 == NULL) {
 198                 if (atomic_read(&skb->users) != 1) {
 199                         *skb2 = skb_clone(skb, allocation);
 200                 } else {
 201                         *skb2 = skb;
 202                         atomic_inc(&skb->users);
 203                 }
 204         }
 205         if (*skb2 != NULL) {
 206                 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
 207                         skb_orphan(*skb2);
 208                         skb_set_owner_r(*skb2, sk);
 209                         skb_queue_tail(&sk->sk_receive_queue, *skb2);
 210                         sk->sk_data_ready(sk, (*skb2)->len);
 211                         *skb2 = NULL;
 212                         err = 0;
 213                 }
 214         }
 215         sock_put(sk);
 216         return err;
 217 }
 218
 219 /* Send SKB to all pfkey sockets matching selected criteria.  */
 220 #define BROADCAST_ALL           0
 221 #define BROADCAST_ONE           1
 222 #define BROADCAST_REGISTERED    2
 223 #define BROADCAST_PROMISC_ONLY  4
 224 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
 225                            int broadcast_flags, struct sock *one_sk)
 226 {
 227         struct sock *sk;
 228         struct hlist_node *node;
 229         struct sk_buff *skb2 = NULL;
 230         int err = -ESRCH;
 231
 232         /* XXX Do we need something like netlink_overrun?  I think
 233          * XXX PF_KEY socket apps will not mind current behavior.
 234          */
 235         if (!skb)
 236                 return -ENOMEM;
 237
 238         pfkey_lock_table();
 239         sk_for_each(sk, node, &pfkey_table) {
 240                 struct pfkey_sock *pfk = pfkey_sk(sk);
 241                 int err2;
 242
 243                 /* Yes, it means that if you are meant to receive this
 244                  * pfkey message you receive it twice as promiscuous
 245                  * socket.
 246                  */
 247                 if (pfk->promisc)
 248                         pfkey_broadcast_one(skb, &skb2, allocation, sk);
 249
 250                 /* the exact target will be processed later */
 251                 if (sk == one_sk)
 252                         continue;
 253                 if (broadcast_flags != BROADCAST_ALL) {
 254                         if (broadcast_flags & BROADCAST_PROMISC_ONLY)
 255                                 continue;
 256                         if ((broadcast_flags & BROADCAST_REGISTERED) &&
 257                             !pfk->registered)
 258                                 continue;
 259                         if (broadcast_flags & BROADCAST_ONE)
 260                                 continue;
 261                 }
 262
 263                 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
 264
 265                 /* Error is cleare after succecful sending to at least one
 266                  * registered KM */
 267                 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
 268                         err = err2;
 269         }
 270         pfkey_unlock_table();
 271
 272         if (one_sk != NULL)
 273                 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
 274
 275         if (skb2)
 276                 kfree_skb(skb2);
 277         kfree_skb(skb);
 278         return err;
 279 }
 280
 281 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
 282 {
 283         *new = *orig;
 284 }
 285
 286 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
 287 {
 288         struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
 289         struct sadb_msg *hdr;
 290
 291         if (!skb)
 292                 return -ENOBUFS;
 293
 294         /* Woe be to the platform trying to support PFKEY yet
 295          * having normal errnos outside the 1-255 range, inclusive.
 296          */
 297         err = -err;
 298         if (err == ERESTARTSYS ||
 299             err == ERESTARTNOHAND ||
 300             err == ERESTARTNOINTR)
 301                 err = EINTR;
 302         if (err >= 512)
 303                 err = EINVAL;
 304         BUG_ON(err <= 0 || err >= 256);
 305
 306         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
 307         pfkey_hdr_dup(hdr, orig);
 308         hdr->sadb_msg_errno = (uint8_t) err;
 309         hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
 310                              sizeof(uint64_t));
 311
 312         pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
 313
 314         return 0;
 315 }
 316
 317 static u8 sadb_ext_min_len[] = {
 318         [SADB_EXT_RESERVED]             = (u8) 0,
 319         [SADB_EXT_SA]                   = (u8) sizeof(struct sadb_sa),
 320         [SADB_EXT_LIFETIME_CURRENT]     = (u8) sizeof(struct sadb_lifetime),
 321         [SADB_EXT_LIFETIME_HARD]        = (u8) sizeof(struct sadb_lifetime),
 322         [SADB_EXT_LIFETIME_SOFT]        = (u8) sizeof(struct sadb_lifetime),
 323         [SADB_EXT_ADDRESS_SRC]          = (u8) sizeof(struct sadb_address),
 324         [SADB_EXT_ADDRESS_DST]          = (u8) sizeof(struct sadb_address),
 325         [SADB_EXT_ADDRESS_PROXY]        = (u8) sizeof(struct sadb_address),
 326         [SADB_EXT_KEY_AUTH]             = (u8) sizeof(struct sadb_key),
 327         [SADB_EXT_KEY_ENCRYPT]          = (u8) sizeof(struct sadb_key),
 328         [SADB_EXT_IDENTITY_SRC]         = (u8) sizeof(struct sadb_ident),
 329         [SADB_EXT_IDENTITY_DST]         = (u8) sizeof(struct sadb_ident),
 330         [SADB_EXT_SENSITIVITY]          = (u8) sizeof(struct sadb_sens),
 331         [SADB_EXT_PROPOSAL]             = (u8) sizeof(struct sadb_prop),
 332         [SADB_EXT_SUPPORTED_AUTH]       = (u8) sizeof(struct sadb_supported),
 333         [SADB_EXT_SUPPORTED_ENCRYPT]    = (u8) sizeof(struct sadb_supported),
 334         [SADB_EXT_SPIRANGE]             = (u8) sizeof(struct sadb_spirange),
 335         [SADB_X_EXT_KMPRIVATE]          = (u8) sizeof(struct sadb_x_kmprivate),
 336         [SADB_X_EXT_POLICY]             = (u8) sizeof(struct sadb_x_policy),
 337         [SADB_X_EXT_SA2]                = (u8) sizeof(struct sadb_x_sa2),
 338         [SADB_X_EXT_NAT_T_TYPE]         = (u8) sizeof(struct sadb_x_nat_t_type),
 339         [SADB_X_EXT_NAT_T_SPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
 340         [SADB_X_EXT_NAT_T_DPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
 341         [SADB_X_EXT_NAT_T_OA]           = (u8) sizeof(struct sadb_address),
 342         [SADB_X_EXT_SEC_CTX]            = (u8) sizeof(struct sadb_x_sec_ctx),
 343 };
 344
 345 /* Verify sadb_address_{len,prefixlen} against sa_family.  */
 346 static int verify_address_len(void *p)
 347 {
 348         struct sadb_address *sp = p;
 349         struct sockaddr *addr = (struct sockaddr *)(sp + 1);
 350         struct sockaddr_in *sin;
 351 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 352         struct sockaddr_in6 *sin6;
 353 #endif
 354         int len;
 355
 356         switch (addr->sa_family) {
 357         case AF_INET:
 358                 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
 359                 if (sp->sadb_address_len != len ||
 360                     sp->sadb_address_prefixlen > 32)
 361                         return -EINVAL;
 362                 break;
 363 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 364         case AF_INET6:
 365                 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
 366                 if (sp->sadb_address_len != len ||
 367                     sp->sadb_address_prefixlen > 128)
 368                         return -EINVAL;
 369                 break;
 370 #endif
 371         default:
 372                 /* It is user using kernel to keep track of security
 373                  * associations for another protocol, such as
 374                  * OSPF/RSVP/RIPV2/MIP.  It is user's job to verify
 375                  * lengths.
 376                  *
 377                  * XXX Actually, association/policy database is not yet
 378                  * XXX able to cope with arbitrary sockaddr families.
 379                  * XXX When it can, remove this -EINVAL.  -DaveM
 380                  */
 381                 return -EINVAL;
 382                 break;
 383         }
 384
 385         return 0;
 386 }
 387
 388 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
 389 {
 390         return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
 391                             sec_ctx->sadb_x_ctx_len,
 392                             sizeof(uint64_t));
 393 }
 394
 395 static inline int verify_sec_ctx_len(void *p)
 396 {
 397         struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
 398         int len;
 399
 400         if (sec_ctx->sadb_x_ctx_len > PAGE_SIZE)
 401                 return -EINVAL;
 402
 403         len = pfkey_sec_ctx_len(sec_ctx);
 404
 405         if (sec_ctx->sadb_x_sec_len != len)
 406                 return -EINVAL;
 407
 408         return 0;
 409 }
 410
 411 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
 412 {
 413         struct xfrm_user_sec_ctx *uctx = NULL;
 414         int ctx_size = sec_ctx->sadb_x_ctx_len;
 415
 416         uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
 417
 418         if (!uctx)
 419                 return NULL;
 420
 421         uctx->len = pfkey_sec_ctx_len(sec_ctx);
 422         uctx->exttype = sec_ctx->sadb_x_sec_exttype;
 423         uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
 424         uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
 425         uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
 426         memcpy(uctx + 1, sec_ctx + 1,
 427                uctx->ctx_len);
 428
 429         return uctx;
 430 }
 431
 432 static int present_and_same_family(struct sadb_address *src,
 433                                    struct sadb_address *dst)
 434 {
 435         struct sockaddr *s_addr, *d_addr;
 436
 437         if (!src || !dst)
 438                 return 0;
 439
 440         s_addr = (struct sockaddr *)(src + 1);
 441         d_addr = (struct sockaddr *)(dst + 1);
 442         if (s_addr->sa_family != d_addr->sa_family)
 443                 return 0;
 444         if (s_addr->sa_family != AF_INET
 445 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 446             && s_addr->sa_family != AF_INET6
 447 #endif
 448                 )
 449                 return 0;
 450
 451         return 1;
 452 }
 453
 454 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
 455 {
 456         char *p = (char *) hdr;
 457         int len = skb->len;
 458
 459         len -= sizeof(*hdr);
 460         p += sizeof(*hdr);
 461         while (len > 0) {
 462                 struct sadb_ext *ehdr = (struct sadb_ext *) p;
 463                 uint16_t ext_type;
 464                 int ext_len;
 465
 466                 ext_len  = ehdr->sadb_ext_len;
 467                 ext_len *= sizeof(uint64_t);
 468                 ext_type = ehdr->sadb_ext_type;
 469                 if (ext_len < sizeof(uint64_t) ||
 470                     ext_len > len ||
 471                     ext_type == SADB_EXT_RESERVED)
 472                         return -EINVAL;
 473
 474                 if (ext_type <= SADB_EXT_MAX) {
 475                         int min = (int) sadb_ext_min_len[ext_type];
 476                         if (ext_len < min)
 477                                 return -EINVAL;
 478                         if (ext_hdrs[ext_type-1] != NULL)
 479                                 return -EINVAL;
 480                         if (ext_type == SADB_EXT_ADDRESS_SRC ||
 481                             ext_type == SADB_EXT_ADDRESS_DST ||
 482                             ext_type == SADB_EXT_ADDRESS_PROXY ||
 483                             ext_type == SADB_X_EXT_NAT_T_OA) {
 484                                 if (verify_address_len(p))
 485                                         return -EINVAL;
 486                         }
 487                         if (ext_type == SADB_X_EXT_SEC_CTX) {
 488                                 if (verify_sec_ctx_len(p))
 489                                         return -EINVAL;
 490                         }
 491                         ext_hdrs[ext_type-1] = p;
 492                 }
 493                 p   += ext_len;
 494                 len -= ext_len;
 495         }
 496
 497         return 0;
 498 }
 499
 500 static uint16_t
 501 pfkey_satype2proto(uint8_t satype)
 502 {
 503         switch (satype) {
 504         case SADB_SATYPE_UNSPEC:
 505                 return IPSEC_PROTO_ANY;
 506         case SADB_SATYPE_AH:
 507                 return IPPROTO_AH;
 508         case SADB_SATYPE_ESP:
 509                 return IPPROTO_ESP;
 510         case SADB_X_SATYPE_IPCOMP:
 511                 return IPPROTO_COMP;
 512                 break;
 513         default:
 514                 return 0;
 515         }
 516         /* NOTREACHED */
 517 }
 518
 519 static uint8_t
 520 pfkey_proto2satype(uint16_t proto)
 521 {
 522         switch (proto) {
 523         case IPPROTO_AH:
 524                 return SADB_SATYPE_AH;
 525         case IPPROTO_ESP:
 526                 return SADB_SATYPE_ESP;
 527         case IPPROTO_COMP:
 528                 return SADB_X_SATYPE_IPCOMP;
 529                 break;
 530         default:
 531                 return 0;
 532         }
 533         /* NOTREACHED */
 534 }
 535
 536 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
 537  * say specifically 'just raw sockets' as we encode them as 255.
 538  */
 539
 540 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
 541 {
 542         return (proto == IPSEC_PROTO_ANY ? 0 : proto);
 543 }
 544
 545 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
 546 {
 547         return (proto ? proto : IPSEC_PROTO_ANY);
 548 }
 549
 550 static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
 551                                      xfrm_address_t *xaddr)
 552 {
 553         switch (((struct sockaddr*)(addr + 1))->sa_family) {
 554         case AF_INET:
 555                 xaddr->a4 =
 556                         ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
 557                 return AF_INET;
 558 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 559         case AF_INET6:
 560                 memcpy(xaddr->a6,
 561                        &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
 562                        sizeof(struct in6_addr));
 563                 return AF_INET6;
 564 #endif
 565         default:
 566                 return 0;
 567         }
 568         /* NOTREACHED */
 569 }
 570
 571 static struct  xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
 572 {
 573         struct sadb_sa *sa;
 574         struct sadb_address *addr;
 575         uint16_t proto;
 576         unsigned short family;
 577         xfrm_address_t *xaddr;
 578
 579         sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
 580         if (sa == NULL)
 581                 return NULL;
 582
 583         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
 584         if (proto == 0)
 585                 return NULL;
 586
 587         /* sadb_address_len should be checked by caller */
 588         addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
 589         if (addr == NULL)
 590                 return NULL;
 591
 592         family = ((struct sockaddr *)(addr + 1))->sa_family;
 593         switch (family) {
 594         case AF_INET:
 595                 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
 596                 break;
 597 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 598         case AF_INET6:
 599                 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
 600                 break;
 601 #endif
 602         default:
 603                 xaddr = NULL;
 604         }
 605
 606         if (!xaddr)
 607                 return NULL;
 608
 609         return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
 610 }
 611
 612 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
 613 static int
 614 pfkey_sockaddr_size(sa_family_t family)
 615 {
 616         switch (family) {
 617         case AF_INET:
 618                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
 619 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 620         case AF_INET6:
 621                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
 622 #endif
 623         default:
 624                 return 0;
 625         }
 626         /* NOTREACHED */
 627 }
 628
 629 static inline int pfkey_mode_from_xfrm(int mode)
 630 {
 631         switch(mode) {
 632         case XFRM_MODE_TRANSPORT:
 633                 return IPSEC_MODE_TRANSPORT;
 634         case XFRM_MODE_TUNNEL:
 635                 return IPSEC_MODE_TUNNEL;
 636         case XFRM_MODE_BEET:
 637                 return IPSEC_MODE_BEET;
 638         default:
 639                 return -1;
 640         }
 641 }
 642
 643 static inline int pfkey_mode_to_xfrm(int mode)
 644 {
 645         switch(mode) {
 646         case IPSEC_MODE_ANY:    /*XXX*/
 647         case IPSEC_MODE_TRANSPORT:
 648                 return XFRM_MODE_TRANSPORT;
 649         case IPSEC_MODE_TUNNEL:
 650                 return XFRM_MODE_TUNNEL;
 651         case IPSEC_MODE_BEET:
 652                 return XFRM_MODE_BEET;
 653         default:
 654                 return -1;
 655         }
 656 }
 657
 658 static struct sk_buff * pfkey_xfrm_state2msg(struct xfrm_state *x, int add_keys, int hsc)
 659 {
 660         struct sk_buff *skb;
 661         struct sadb_msg *hdr;
 662         struct sadb_sa *sa;
 663         struct sadb_lifetime *lifetime;
 664         struct sadb_address *addr;
 665         struct sadb_key *key;
 666         struct sadb_x_sa2 *sa2;
 667         struct sockaddr_in *sin;
 668         struct sadb_x_sec_ctx *sec_ctx;
 669         struct xfrm_sec_ctx *xfrm_ctx;
 670         int ctx_size = 0;
 671 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 672         struct sockaddr_in6 *sin6;
 673 #endif
 674         int size;
 675         int auth_key_size = 0;
 676         int encrypt_key_size = 0;
 677         int sockaddr_size;
 678         struct xfrm_encap_tmpl *natt = NULL;
 679         int mode;
 680
 681         /* address family check */
 682         sockaddr_size = pfkey_sockaddr_size(x->props.family);
 683         if (!sockaddr_size)
 684                 return ERR_PTR(-EINVAL);
 685
 686         /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
 687            key(AE), (identity(SD),) (sensitivity)> */
 688         size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
 689                 sizeof(struct sadb_lifetime) +
 690                 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
 691                 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
 692                         sizeof(struct sadb_address)*2 +
 693                                 sockaddr_size*2 +
 694                                         sizeof(struct sadb_x_sa2);
 695
 696         if ((xfrm_ctx = x->security)) {
 697                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
 698                 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
 699         }
 700
 701         /* identity & sensitivity */
 702
 703         if ((x->props.family == AF_INET &&
 704              x->sel.saddr.a4 != x->props.saddr.a4)
 705 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 706             || (x->props.family == AF_INET6 &&
 707                 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
 708 #endif
 709                 )
 710                 size += sizeof(struct sadb_address) + sockaddr_size;
 711
 712         if (add_keys) {
 713                 if (x->aalg && x->aalg->alg_key_len) {
 714                         auth_key_size =
 715                                 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
 716                         size += sizeof(struct sadb_key) + auth_key_size;
 717                 }
 718                 if (x->ealg && x->ealg->alg_key_len) {
 719                         encrypt_key_size =
 720                                 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
 721                         size += sizeof(struct sadb_key) + encrypt_key_size;
 722                 }
 723         }
 724         if (x->encap)
 725                 natt = x->encap;
 726
 727         if (natt && natt->encap_type) {
 728                 size += sizeof(struct sadb_x_nat_t_type);
 729                 size += sizeof(struct sadb_x_nat_t_port);
 730                 size += sizeof(struct sadb_x_nat_t_port);
 731         }
 732
 733         skb =  alloc_skb(size + 16, GFP_ATOMIC);
 734         if (skb == NULL)
 735                 return ERR_PTR(-ENOBUFS);
 736
 737         /* call should fill header later */
 738         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
 739         memset(hdr, 0, size);   /* XXX do we need this ? */
 740         hdr->sadb_msg_len = size / sizeof(uint64_t);
 741
 742         /* sa */
 743         sa = (struct sadb_sa *)  skb_put(skb, sizeof(struct sadb_sa));
 744         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
 745         sa->sadb_sa_exttype = SADB_EXT_SA;
 746         sa->sadb_sa_spi = x->id.spi;
 747         sa->sadb_sa_replay = x->props.replay_window;
 748         switch (x->km.state) {
 749         case XFRM_STATE_VALID:
 750                 sa->sadb_sa_state = x->km.dying ?
 751                         SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
 752                 break;
 753         case XFRM_STATE_ACQ:
 754                 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
 755                 break;
 756         default:
 757                 sa->sadb_sa_state = SADB_SASTATE_DEAD;
 758                 break;
 759         }
 760         sa->sadb_sa_auth = 0;
 761         if (x->aalg) {
 762                 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
 763                 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
 764         }
 765         sa->sadb_sa_encrypt = 0;
 766         BUG_ON(x->ealg && x->calg);
 767         if (x->ealg) {
 768                 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
 769                 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
 770         }
 771         /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
 772         if (x->calg) {
 773                 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
 774                 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
 775         }
 776
 777         sa->sadb_sa_flags = 0;
 778         if (x->props.flags & XFRM_STATE_NOECN)
 779                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
 780         if (x->props.flags & XFRM_STATE_DECAP_DSCP)
 781                 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
 782         if (x->props.flags & XFRM_STATE_NOPMTUDISC)
 783                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
 784
 785         /* hard time */
 786         if (hsc & 2) {
 787                 lifetime = (struct sadb_lifetime *)  skb_put(skb,
 788                                                              sizeof(struct sadb_lifetime));
 789                 lifetime->sadb_lifetime_len =
 790                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 791                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
 792                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.hard_packet_limit);
 793                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
 794                 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
 795                 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
 796         }
 797         /* soft time */
 798         if (hsc & 1) {
 799                 lifetime = (struct sadb_lifetime *)  skb_put(skb,
 800                                                              sizeof(struct sadb_lifetime));
 801                 lifetime->sadb_lifetime_len =
 802                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 803                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
 804                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.soft_packet_limit);
 805                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
 806                 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
 807                 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
 808         }
 809         /* current time */
 810         lifetime = (struct sadb_lifetime *)  skb_put(skb,
 811                                                      sizeof(struct sadb_lifetime));
 812         lifetime->sadb_lifetime_len =
 813                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 814         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
 815         lifetime->sadb_lifetime_allocations = x->curlft.packets;
 816         lifetime->sadb_lifetime_bytes = x->curlft.bytes;
 817         lifetime->sadb_lifetime_addtime = x->curlft.add_time;
 818         lifetime->sadb_lifetime_usetime = x->curlft.use_time;
 819         /* src address */
 820         addr = (struct sadb_address*) skb_put(skb,
 821                                               sizeof(struct sadb_address)+sockaddr_size);
 822         addr->sadb_address_len =
 823                 (sizeof(struct sadb_address)+sockaddr_size)/
 824                         sizeof(uint64_t);
 825         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
 826         /* "if the ports are non-zero, then the sadb_address_proto field,
 827            normally zero, MUST be filled in with the transport
 828            protocol's number." - RFC2367 */
 829         addr->sadb_address_proto = 0;
 830         addr->sadb_address_reserved = 0;
 831         if (x->props.family == AF_INET) {
 832                 addr->sadb_address_prefixlen = 32;
 833
 834                 sin = (struct sockaddr_in *) (addr + 1);
 835                 sin->sin_family = AF_INET;
 836                 sin->sin_addr.s_addr = x->props.saddr.a4;
 837                 sin->sin_port = 0;
 838                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
 839         }
 840 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 841         else if (x->props.family == AF_INET6) {
 842                 addr->sadb_address_prefixlen = 128;
 843
 844                 sin6 = (struct sockaddr_in6 *) (addr + 1);
 845                 sin6->sin6_family = AF_INET6;
 846                 sin6->sin6_port = 0;
 847                 sin6->sin6_flowinfo = 0;
 848                 memcpy(&sin6->sin6_addr, x->props.saddr.a6,
 849                        sizeof(struct in6_addr));
 850                 sin6->sin6_scope_id = 0;
 851         }
 852 #endif
 853         else
 854                 BUG();
 855
 856         /* dst address */
 857         addr = (struct sadb_address*) skb_put(skb,
 858                                               sizeof(struct sadb_address)+sockaddr_size);
 859         addr->sadb_address_len =
 860                 (sizeof(struct sadb_address)+sockaddr_size)/
 861                         sizeof(uint64_t);
 862         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
 863         addr->sadb_address_proto = 0;
 864         addr->sadb_address_prefixlen = 32; /* XXX */
 865         addr->sadb_address_reserved = 0;
 866         if (x->props.family == AF_INET) {
 867                 sin = (struct sockaddr_in *) (addr + 1);
 868                 sin->sin_family = AF_INET;
 869                 sin->sin_addr.s_addr = x->id.daddr.a4;
 870                 sin->sin_port = 0;
 871                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
 872
 873                 if (x->sel.saddr.a4 != x->props.saddr.a4) {
 874                         addr = (struct sadb_address*) skb_put(skb,
 875                                 sizeof(struct sadb_address)+sockaddr_size);
 876                         addr->sadb_address_len =
 877                                 (sizeof(struct sadb_address)+sockaddr_size)/
 878                                 sizeof(uint64_t);
 879                         addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
 880                         addr->sadb_address_proto =
 881                                 pfkey_proto_from_xfrm(x->sel.proto);
 882                         addr->sadb_address_prefixlen = x->sel.prefixlen_s;
 883                         addr->sadb_address_reserved = 0;
 884
 885                         sin = (struct sockaddr_in *) (addr + 1);
 886                         sin->sin_family = AF_INET;
 887                         sin->sin_addr.s_addr = x->sel.saddr.a4;
 888                         sin->sin_port = x->sel.sport;
 889                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
 890                 }
 891         }
 892 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 893         else if (x->props.family == AF_INET6) {
 894                 addr->sadb_address_prefixlen = 128;
 895
 896                 sin6 = (struct sockaddr_in6 *) (addr + 1);
 897                 sin6->sin6_family = AF_INET6;
 898                 sin6->sin6_port = 0;
 899                 sin6->sin6_flowinfo = 0;
 900                 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
 901                 sin6->sin6_scope_id = 0;
 902
 903                 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
 904                             sizeof(struct in6_addr))) {
 905                         addr = (struct sadb_address *) skb_put(skb,
 906                                 sizeof(struct sadb_address)+sockaddr_size);
 907                         addr->sadb_address_len =
 908                                 (sizeof(struct sadb_address)+sockaddr_size)/
 909                                 sizeof(uint64_t);
 910                         addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
 911                         addr->sadb_address_proto =
 912                                 pfkey_proto_from_xfrm(x->sel.proto);
 913                         addr->sadb_address_prefixlen = x->sel.prefixlen_s;
 914                         addr->sadb_address_reserved = 0;
 915
 916                         sin6 = (struct sockaddr_in6 *) (addr + 1);
 917                         sin6->sin6_family = AF_INET6;
 918                         sin6->sin6_port = x->sel.sport;
 919                         sin6->sin6_flowinfo = 0;
 920                         memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
 921                                sizeof(struct in6_addr));
 922                         sin6->sin6_scope_id = 0;
 923                 }
 924         }
 925 #endif
 926         else
 927                 BUG();
 928
 929         /* auth key */
 930         if (add_keys && auth_key_size) {
 931                 key = (struct sadb_key *) skb_put(skb,
 932                                                   sizeof(struct sadb_key)+auth_key_size);
 933                 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
 934                         sizeof(uint64_t);
 935                 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
 936                 key->sadb_key_bits = x->aalg->alg_key_len;
 937                 key->sadb_key_reserved = 0;
 938                 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
 939         }
 940         /* encrypt key */
 941         if (add_keys && encrypt_key_size) {
 942                 key = (struct sadb_key *) skb_put(skb,
 943                                                   sizeof(struct sadb_key)+encrypt_key_size);
 944                 key->sadb_key_len = (sizeof(struct sadb_key) +
 945                                      encrypt_key_size) / sizeof(uint64_t);
 946                 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
 947                 key->sadb_key_bits = x->ealg->alg_key_len;
 948                 key->sadb_key_reserved = 0;
 949                 memcpy(key + 1, x->ealg->alg_key,
 950                        (x->ealg->alg_key_len+7)/8);
 951         }
 952
 953         /* sa */
 954         sa2 = (struct sadb_x_sa2 *)  skb_put(skb, sizeof(struct sadb_x_sa2));
 955         sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
 956         sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
 957         if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
 958                 kfree_skb(skb);
 959                 return ERR_PTR(-EINVAL);
 960         }
 961         sa2->sadb_x_sa2_mode = mode;
 962         sa2->sadb_x_sa2_reserved1 = 0;
 963         sa2->sadb_x_sa2_reserved2 = 0;
 964         sa2->sadb_x_sa2_sequence = 0;
 965         sa2->sadb_x_sa2_reqid = x->props.reqid;
 966
 967         if (natt && natt->encap_type) {
 968                 struct sadb_x_nat_t_type *n_type;
 969                 struct sadb_x_nat_t_port *n_port;
 970
 971                 /* type */
 972                 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
 973                 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
 974                 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
 975                 n_type->sadb_x_nat_t_type_type = natt->encap_type;
 976                 n_type->sadb_x_nat_t_type_reserved[0] = 0;
 977                 n_type->sadb_x_nat_t_type_reserved[1] = 0;
 978                 n_type->sadb_x_nat_t_type_reserved[2] = 0;
 979
 980                 /* source port */
 981                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
 982                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
 983                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
 984                 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
 985                 n_port->sadb_x_nat_t_port_reserved = 0;
 986
 987                 /* dest port */
 988                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
 989                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
 990                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
 991                 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
 992                 n_port->sadb_x_nat_t_port_reserved = 0;
 993         }
 994
 995         /* security context */
 996         if (xfrm_ctx) {
 997                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
 998                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
 999                 sec_ctx->sadb_x_sec_len =
1000                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1001                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1002                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1003                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1004                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1005                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1006                        xfrm_ctx->ctx_len);
1007         }
1008
1009         return skb;
1010 }
1011
1012 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1013                                                 void **ext_hdrs)
1014 {
1015         struct xfrm_state *x;
1016         struct sadb_lifetime *lifetime;
1017         struct sadb_sa *sa;
1018         struct sadb_key *key;
1019         struct sadb_x_sec_ctx *sec_ctx;
1020         uint16_t proto;
1021         int err;
1022
1023
1024         sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1025         if (!sa ||
1026             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1027                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1028                 return ERR_PTR(-EINVAL);
1029         if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1030             !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1031                 return ERR_PTR(-EINVAL);
1032         if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1033             !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1034                 return ERR_PTR(-EINVAL);
1035         if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1036             !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1037                 return ERR_PTR(-EINVAL);
1038
1039         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1040         if (proto == 0)
1041                 return ERR_PTR(-EINVAL);
1042
1043         /* default error is no buffer space */
1044         err = -ENOBUFS;
1045
1046         /* RFC2367:
1047
1048    Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1049    SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1050    sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1051    Therefore, the sadb_sa_state field of all submitted SAs MUST be
1052    SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1053    not true.
1054
1055            However, KAME setkey always uses SADB_SASTATE_LARVAL.
1056            Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1057          */
1058         if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1059             (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1060              sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1061             sa->sadb_sa_encrypt > SADB_EALG_MAX)
1062                 return ERR_PTR(-EINVAL);
1063         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1064         if (key != NULL &&
1065             sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1066             ((key->sadb_key_bits+7) / 8 == 0 ||
1067              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1068                 return ERR_PTR(-EINVAL);
1069         key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1070         if (key != NULL &&
1071             sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1072             ((key->sadb_key_bits+7) / 8 == 0 ||
1073              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1074                 return ERR_PTR(-EINVAL);
1075
1076         x = xfrm_state_alloc();
1077         if (x == NULL)
1078                 return ERR_PTR(-ENOBUFS);
1079
1080         x->id.proto = proto;
1081         x->id.spi = sa->sadb_sa_spi;
1082         x->props.replay_window = sa->sadb_sa_replay;
1083         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1084                 x->props.flags |= XFRM_STATE_NOECN;
1085         if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1086                 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1087         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1088                 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1089
1090         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1091         if (lifetime != NULL) {
1092                 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1093                 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1094                 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1095                 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1096         }
1097         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1098         if (lifetime != NULL) {
1099                 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1100                 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1101                 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1102                 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1103         }
1104
1105         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1106         if (sec_ctx != NULL) {
1107                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1108
1109                 if (!uctx)
1110                         goto out;
1111
1112                 err = security_xfrm_state_alloc(x, uctx);
1113                 kfree(uctx);
1114
1115                 if (err)
1116                         goto out;
1117         }
1118
1119         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1120         if (sa->sadb_sa_auth) {
1121                 int keysize = 0;
1122                 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1123                 if (!a) {
1124                         err = -ENOSYS;
1125                         goto out;
1126                 }
1127                 if (key)
1128                         keysize = (key->sadb_key_bits + 7) / 8;
1129                 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1130                 if (!x->aalg)
1131                         goto out;
1132                 strcpy(x->aalg->alg_name, a->name);
1133                 x->aalg->alg_key_len = 0;
1134                 if (key) {
1135                         x->aalg->alg_key_len = key->sadb_key_bits;
1136                         memcpy(x->aalg->alg_key, key+1, keysize);
1137                 }
1138                 x->props.aalgo = sa->sadb_sa_auth;
1139                 /* x->algo.flags = sa->sadb_sa_flags; */
1140         }
1141         if (sa->sadb_sa_encrypt) {
1142                 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1143                         struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1144                         if (!a) {
1145                                 err = -ENOSYS;
1146                                 goto out;
1147                         }
1148                         x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1149                         if (!x->calg)
1150                                 goto out;
1151                         strcpy(x->calg->alg_name, a->name);
1152                         x->props.calgo = sa->sadb_sa_encrypt;
1153                 } else {
1154                         int keysize = 0;
1155                         struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1156                         if (!a) {
1157                                 err = -ENOSYS;
1158                                 goto out;
1159                         }
1160                         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1161                         if (key)
1162                                 keysize = (key->sadb_key_bits + 7) / 8;
1163                         x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1164                         if (!x->ealg)
1165                                 goto out;
1166                         strcpy(x->ealg->alg_name, a->name);
1167                         x->ealg->alg_key_len = 0;
1168                         if (key) {
1169                                 x->ealg->alg_key_len = key->sadb_key_bits;
1170                                 memcpy(x->ealg->alg_key, key+1, keysize);
1171                         }
1172                         x->props.ealgo = sa->sadb_sa_encrypt;
1173                 }
1174         }
1175         /* x->algo.flags = sa->sadb_sa_flags; */
1176
1177         x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1178                                                     &x->props.saddr);
1179         if (!x->props.family) {
1180                 err = -EAFNOSUPPORT;
1181                 goto out;
1182         }
1183         pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1184                                   &x->id.daddr);
1185
1186         if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1187                 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1188                 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1189                 if (mode < 0) {
1190                         err = -EINVAL;
1191                         goto out;
1192                 }
1193                 x->props.mode = mode;
1194                 x->props.reqid = sa2->sadb_x_sa2_reqid;
1195         }
1196
1197         if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1198                 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1199
1200                 /* Nobody uses this, but we try. */
1201                 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1202                 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1203         }
1204
1205         if (!x->sel.family)
1206                 x->sel.family = x->props.family;
1207
1208         if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1209                 struct sadb_x_nat_t_type* n_type;
1210                 struct xfrm_encap_tmpl *natt;
1211
1212                 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1213                 if (!x->encap)
1214                         goto out;
1215
1216                 natt = x->encap;
1217                 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1218                 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1219
1220                 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1221                         struct sadb_x_nat_t_port* n_port =
1222                                 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1223                         natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1224                 }
1225                 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1226                         struct sadb_x_nat_t_port* n_port =
1227                                 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1228                         natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1229                 }
1230         }
1231
1232         err = xfrm_init_state(x);
1233         if (err)
1234                 goto out;
1235
1236         x->km.seq = hdr->sadb_msg_seq;
1237         return x;
1238
1239 out:
1240         x->km.state = XFRM_STATE_DEAD;
1241         xfrm_state_put(x);
1242         return ERR_PTR(err);
1243 }
1244
1245 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1246 {
1247         return -EOPNOTSUPP;
1248 }
1249
1250 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1251 {
1252         struct sk_buff *resp_skb;
1253         struct sadb_x_sa2 *sa2;
1254         struct sadb_address *saddr, *daddr;
1255         struct sadb_msg *out_hdr;
1256         struct xfrm_state *x = NULL;
1257         int mode;
1258         u32 reqid;
1259         u8 proto;
1260         unsigned short family;
1261         xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1262
1263         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1264                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1265                 return -EINVAL;
1266
1267         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1268         if (proto == 0)
1269                 return -EINVAL;
1270
1271         if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1272                 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1273                 if (mode < 0)
1274                         return -EINVAL;
1275                 reqid = sa2->sadb_x_sa2_reqid;
1276         } else {
1277                 mode = 0;
1278                 reqid = 0;
1279         }
1280
1281         saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1282         daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1283
1284         family = ((struct sockaddr *)(saddr + 1))->sa_family;
1285         switch (family) {
1286         case AF_INET:
1287                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1288                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1289                 break;
1290 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1291         case AF_INET6:
1292                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1293                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1294                 break;
1295 #endif
1296         }
1297
1298         if (hdr->sadb_msg_seq) {
1299                 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1300                 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1301                         xfrm_state_put(x);
1302                         x = NULL;
1303                 }
1304         }
1305
1306         if (!x)
1307                 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1308
1309         if (x == NULL)
1310                 return -ENOENT;
1311
1312         resp_skb = ERR_PTR(-ENOENT);
1313
1314         spin_lock_bh(&x->lock);
1315         if (x->km.state != XFRM_STATE_DEAD) {
1316                 struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1317                 u32 min_spi, max_spi;
1318
1319                 if (range != NULL) {
1320                         min_spi = range->sadb_spirange_min;
1321                         max_spi = range->sadb_spirange_max;
1322                 } else {
1323                         min_spi = 0x100;
1324                         max_spi = 0x0fffffff;
1325                 }
1326                 xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi));
1327                 if (x->id.spi)
1328                         resp_skb = pfkey_xfrm_state2msg(x, 0, 3);
1329         }
1330         spin_unlock_bh(&x->lock);
1331
1332         if (IS_ERR(resp_skb)) {
1333                 xfrm_state_put(x);
1334                 return  PTR_ERR(resp_skb);
1335         }
1336
1337         out_hdr = (struct sadb_msg *) resp_skb->data;
1338         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1339         out_hdr->sadb_msg_type = SADB_GETSPI;
1340         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1341         out_hdr->sadb_msg_errno = 0;
1342         out_hdr->sadb_msg_reserved = 0;
1343         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1344         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1345
1346         xfrm_state_put(x);
1347
1348         pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1349
1350         return 0;
1351 }
1352
1353 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1354 {
1355         struct xfrm_state *x;
1356
1357         if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1358                 return -EOPNOTSUPP;
1359
1360         if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1361                 return 0;
1362
1363         x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1364         if (x == NULL)
1365                 return 0;
1366
1367         spin_lock_bh(&x->lock);
1368         if (x->km.state == XFRM_STATE_ACQ) {
1369                 x->km.state = XFRM_STATE_ERROR;
1370                 wake_up(&km_waitq);
1371         }
1372         spin_unlock_bh(&x->lock);
1373         xfrm_state_put(x);
1374         return 0;
1375 }
1376
1377 static inline int event2poltype(int event)
1378 {
1379         switch (event) {
1380         case XFRM_MSG_DELPOLICY:
1381                 return SADB_X_SPDDELETE;
1382         case XFRM_MSG_NEWPOLICY:
1383                 return SADB_X_SPDADD;
1384         case XFRM_MSG_UPDPOLICY:
1385                 return SADB_X_SPDUPDATE;
1386         case XFRM_MSG_POLEXPIRE:
1387         //      return SADB_X_SPDEXPIRE;
1388         default:
1389                 printk("pfkey: Unknown policy event %d\n", event);
1390                 break;
1391         }
1392
1393         return 0;
1394 }
1395
1396 static inline int event2keytype(int event)
1397 {
1398         switch (event) {
1399         case XFRM_MSG_DELSA:
1400                 return SADB_DELETE;
1401         case XFRM_MSG_NEWSA:
1402                 return SADB_ADD;
1403         case XFRM_MSG_UPDSA:
1404                 return SADB_UPDATE;
1405         case XFRM_MSG_EXPIRE:
1406                 return SADB_EXPIRE;
1407         default:
1408                 printk("pfkey: Unknown SA event %d\n", event);
1409                 break;
1410         }
1411
1412         return 0;
1413 }
1414
1415 /* ADD/UPD/DEL */
1416 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1417 {
1418         struct sk_buff *skb;
1419         struct sadb_msg *hdr;
1420         int hsc = 3;
1421
1422         if (c->event == XFRM_MSG_DELSA)
1423                 hsc = 0;
1424
1425         skb = pfkey_xfrm_state2msg(x, 0, hsc);
1426
1427         if (IS_ERR(skb))
1428                 return PTR_ERR(skb);
1429
1430         hdr = (struct sadb_msg *) skb->data;
1431         hdr->sadb_msg_version = PF_KEY_V2;
1432         hdr->sadb_msg_type = event2keytype(c->event);
1433         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1434         hdr->sadb_msg_errno = 0;
1435         hdr->sadb_msg_reserved = 0;
1436         hdr->sadb_msg_seq = c->seq;
1437         hdr->sadb_msg_pid = c->pid;
1438
1439         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1440
1441         return 0;
1442 }
1443
1444 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1445 {
1446         struct xfrm_state *x;
1447         int err;
1448         struct km_event c;
1449
1450         x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1451         if (IS_ERR(x))
1452                 return PTR_ERR(x);
1453
1454         xfrm_state_hold(x);
1455         if (hdr->sadb_msg_type == SADB_ADD)
1456                 err = xfrm_state_add(x);
1457         else
1458                 err = xfrm_state_update(x);
1459
1460         xfrm_audit_state_add(x, err ? 0 : 1,
1461                              audit_get_loginuid(current->audit_context), 0);
1462
1463         if (err < 0) {
1464                 x->km.state = XFRM_STATE_DEAD;
1465                 __xfrm_state_put(x);
1466                 goto out;
1467         }
1468
1469         if (hdr->sadb_msg_type == SADB_ADD)
1470                 c.event = XFRM_MSG_NEWSA;
1471         else
1472                 c.event = XFRM_MSG_UPDSA;
1473         c.seq = hdr->sadb_msg_seq;
1474         c.pid = hdr->sadb_msg_pid;
1475         km_state_notify(x, &c);
1476 out:
1477         xfrm_state_put(x);
1478         return err;
1479 }
1480
1481 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1482 {
1483         struct xfrm_state *x;
1484         struct km_event c;
1485         int err;
1486
1487         if (!ext_hdrs[SADB_EXT_SA-1] ||
1488             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1489                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1490                 return -EINVAL;
1491
1492         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1493         if (x == NULL)
1494                 return -ESRCH;
1495
1496         if ((err = security_xfrm_state_delete(x)))
1497                 goto out;
1498
1499         if (xfrm_state_kern(x)) {
1500                 err = -EPERM;
1501                 goto out;
1502         }
1503
1504         err = xfrm_state_delete(x);
1505
1506         if (err < 0)
1507                 goto out;
1508
1509         c.seq = hdr->sadb_msg_seq;
1510         c.pid = hdr->sadb_msg_pid;
1511         c.event = XFRM_MSG_DELSA;
1512         km_state_notify(x, &c);
1513 out:
1514         xfrm_audit_state_delete(x, err ? 0 : 1,
1515                                audit_get_loginuid(current->audit_context), 0);
1516         xfrm_state_put(x);
1517
1518         return err;
1519 }
1520
1521 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1522 {
1523         __u8 proto;
1524         struct sk_buff *out_skb;
1525         struct sadb_msg *out_hdr;
1526         struct xfrm_state *x;
1527
1528         if (!ext_hdrs[SADB_EXT_SA-1] ||
1529             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1530                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1531                 return -EINVAL;
1532
1533         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1534         if (x == NULL)
1535                 return -ESRCH;
1536
1537         out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1538         proto = x->id.proto;
1539         xfrm_state_put(x);
1540         if (IS_ERR(out_skb))
1541                 return  PTR_ERR(out_skb);
1542
1543         out_hdr = (struct sadb_msg *) out_skb->data;
1544         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1545         out_hdr->sadb_msg_type = SADB_DUMP;
1546         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1547         out_hdr->sadb_msg_errno = 0;
1548         out_hdr->sadb_msg_reserved = 0;
1549         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1550         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1551         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1552
1553         return 0;
1554 }
1555
1556 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1557                                               gfp_t allocation)
1558 {
1559         struct sk_buff *skb;
1560         struct sadb_msg *hdr;
1561         int len, auth_len, enc_len, i;
1562
1563         auth_len = xfrm_count_auth_supported();
1564         if (auth_len) {
1565                 auth_len *= sizeof(struct sadb_alg);
1566                 auth_len += sizeof(struct sadb_supported);
1567         }
1568
1569         enc_len = xfrm_count_enc_supported();
1570         if (enc_len) {
1571                 enc_len *= sizeof(struct sadb_alg);
1572                 enc_len += sizeof(struct sadb_supported);
1573         }
1574
1575         len = enc_len + auth_len + sizeof(struct sadb_msg);
1576
1577         skb = alloc_skb(len + 16, allocation);
1578         if (!skb)
1579                 goto out_put_algs;
1580
1581         hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1582         pfkey_hdr_dup(hdr, orig);
1583         hdr->sadb_msg_errno = 0;
1584         hdr->sadb_msg_len = len / sizeof(uint64_t);
1585
1586         if (auth_len) {
1587                 struct sadb_supported *sp;
1588                 struct sadb_alg *ap;
1589
1590                 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1591                 ap = (struct sadb_alg *) (sp + 1);
1592
1593                 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1594                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1595
1596                 for (i = 0; ; i++) {
1597                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1598                         if (!aalg)
1599                                 break;
1600                         if (aalg->available)
1601                                 *ap++ = aalg->desc;
1602                 }
1603         }
1604
1605         if (enc_len) {
1606                 struct sadb_supported *sp;
1607                 struct sadb_alg *ap;
1608
1609                 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1610                 ap = (struct sadb_alg *) (sp + 1);
1611
1612                 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1613                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1614
1615                 for (i = 0; ; i++) {
1616                         struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1617                         if (!ealg)
1618                                 break;
1619                         if (ealg->available)
1620                                 *ap++ = ealg->desc;
1621                 }
1622         }
1623
1624 out_put_algs:
1625         return skb;
1626 }
1627
1628 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1629 {
1630         struct pfkey_sock *pfk = pfkey_sk(sk);
1631         struct sk_buff *supp_skb;
1632
1633         if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1634                 return -EINVAL;
1635
1636         if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1637                 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1638                         return -EEXIST;
1639                 pfk->registered |= (1<<hdr->sadb_msg_satype);
1640         }
1641
1642         xfrm_probe_algs();
1643
1644         supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1645         if (!supp_skb) {
1646                 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1647                         pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1648
1649                 return -ENOBUFS;
1650         }
1651
1652         pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1653
1654         return 0;
1655 }
1656
1657 static int key_notify_sa_flush(struct km_event *c)
1658 {
1659         struct sk_buff *skb;
1660         struct sadb_msg *hdr;
1661
1662         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1663         if (!skb)
1664                 return -ENOBUFS;
1665         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1666         hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1667         hdr->sadb_msg_type = SADB_FLUSH;
1668         hdr->sadb_msg_seq = c->seq;
1669         hdr->sadb_msg_pid = c->pid;
1670         hdr->sadb_msg_version = PF_KEY_V2;
1671         hdr->sadb_msg_errno = (uint8_t) 0;
1672         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1673
1674         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1675
1676         return 0;
1677 }
1678
1679 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1680 {
1681         unsigned proto;
1682         struct km_event c;
1683         struct xfrm_audit audit_info;
1684         int err;
1685
1686         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1687         if (proto == 0)
1688                 return -EINVAL;
1689
1690         audit_info.loginuid = audit_get_loginuid(current->audit_context);
1691         audit_info.secid = 0;
1692         err = xfrm_state_flush(proto, &audit_info);
1693         if (err)
1694                 return err;
1695         c.data.proto = proto;
1696         c.seq = hdr->sadb_msg_seq;
1697         c.pid = hdr->sadb_msg_pid;
1698         c.event = XFRM_MSG_FLUSHSA;
1699         km_state_notify(NULL, &c);
1700
1701         return 0;
1702 }
1703
1704 struct pfkey_dump_data
1705 {
1706         struct sk_buff *skb;
1707         struct sadb_msg *hdr;
1708         struct sock *sk;
1709 };
1710
1711 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1712 {
1713         struct pfkey_dump_data *data = ptr;
1714         struct sk_buff *out_skb;
1715         struct sadb_msg *out_hdr;
1716
1717         out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1718         if (IS_ERR(out_skb))
1719                 return PTR_ERR(out_skb);
1720
1721         out_hdr = (struct sadb_msg *) out_skb->data;
1722         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1723         out_hdr->sadb_msg_type = SADB_DUMP;
1724         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1725         out_hdr->sadb_msg_errno = 0;
1726         out_hdr->sadb_msg_reserved = 0;
1727         out_hdr->sadb_msg_seq = count;
1728         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1729         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1730         return 0;
1731 }
1732
1733 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1734 {
1735         u8 proto;
1736         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1737
1738         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1739         if (proto == 0)
1740                 return -EINVAL;
1741
1742         return xfrm_state_walk(proto, dump_sa, &data);
1743 }
1744
1745 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1746 {
1747         struct pfkey_sock *pfk = pfkey_sk(sk);
1748         int satype = hdr->sadb_msg_satype;
1749
1750         if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1751                 /* XXX we mangle packet... */
1752                 hdr->sadb_msg_errno = 0;
1753                 if (satype != 0 && satype != 1)
1754                         return -EINVAL;
1755                 pfk->promisc = satype;
1756         }
1757         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1758         return 0;
1759 }
1760
1761 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1762 {
1763         int i;
1764         u32 reqid = *(u32*)ptr;
1765
1766         for (i=0; i<xp->xfrm_nr; i++) {
1767                 if (xp->xfrm_vec[i].reqid == reqid)
1768                         return -EEXIST;
1769         }
1770         return 0;
1771 }
1772
1773 static u32 gen_reqid(void)
1774 {
1775         u32 start;
1776         static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1777
1778         start = reqid;
1779         do {
1780                 ++reqid;
1781                 if (reqid == 0)
1782                         reqid = IPSEC_MANUAL_REQID_MAX+1;
1783                 if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid,
1784                                      (void*)&reqid) != -EEXIST)
1785                         return reqid;
1786         } while (reqid != start);
1787         return 0;
1788 }
1789
1790 static int
1791 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1792 {
1793         struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1794         struct sockaddr_in *sin;
1795 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1796         struct sockaddr_in6 *sin6;
1797 #endif
1798         int mode;
1799
1800         if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1801                 return -ELOOP;
1802
1803         if (rq->sadb_x_ipsecrequest_mode == 0)
1804                 return -EINVAL;
1805
1806         t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1807         if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1808                 return -EINVAL;
1809         t->mode = mode;
1810         if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1811                 t->optional = 1;
1812         else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1813                 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1814                 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1815                         t->reqid = 0;
1816                 if (!t->reqid && !(t->reqid = gen_reqid()))
1817                         return -ENOBUFS;
1818         }
1819
1820         /* addresses present only in tunnel mode */
1821         if (t->mode == XFRM_MODE_TUNNEL) {
1822                 struct sockaddr *sa;
1823                 sa = (struct sockaddr *)(rq+1);
1824                 switch(sa->sa_family) {
1825                 case AF_INET:
1826                         sin = (struct sockaddr_in*)sa;
1827                         t->saddr.a4 = sin->sin_addr.s_addr;
1828                         sin++;
1829                         if (sin->sin_family != AF_INET)
1830                                 return -EINVAL;
1831                         t->id.daddr.a4 = sin->sin_addr.s_addr;
1832                         break;
1833 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1834                 case AF_INET6:
1835                         sin6 = (struct sockaddr_in6*)sa;
1836                         memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1837                         sin6++;
1838                         if (sin6->sin6_family != AF_INET6)
1839                                 return -EINVAL;
1840                         memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1841                         break;
1842 #endif
1843                 default:
1844                         return -EINVAL;
1845                 }
1846                 t->encap_family = sa->sa_family;
1847         } else
1848                 t->encap_family = xp->family;
1849
1850         /* No way to set this via kame pfkey */
1851         t->aalgos = t->ealgos = t->calgos = ~0;
1852         xp->xfrm_nr++;
1853         return 0;
1854 }
1855
1856 static int
1857 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1858 {
1859         int err;
1860         int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1861         struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1862
1863         while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1864                 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1865                         return err;
1866                 len -= rq->sadb_x_ipsecrequest_len;
1867                 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1868         }
1869         return 0;
1870 }
1871
1872 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1873 {
1874   struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1875
1876         if (xfrm_ctx) {
1877                 int len = sizeof(struct sadb_x_sec_ctx);
1878                 len += xfrm_ctx->ctx_len;
1879                 return PFKEY_ALIGN8(len);
1880         }
1881         return 0;
1882 }
1883
1884 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1885 {
1886         struct xfrm_tmpl *t;
1887         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1888         int socklen = 0;
1889         int i;
1890
1891         for (i=0; i<xp->xfrm_nr; i++) {
1892                 t = xp->xfrm_vec + i;
1893                 socklen += (t->encap_family == AF_INET ?
1894                             sizeof(struct sockaddr_in) :
1895                             sizeof(struct sockaddr_in6));
1896         }
1897
1898         return sizeof(struct sadb_msg) +
1899                 (sizeof(struct sadb_lifetime) * 3) +
1900                 (sizeof(struct sadb_address) * 2) +
1901                 (sockaddr_size * 2) +
1902                 sizeof(struct sadb_x_policy) +
1903                 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1904                 (socklen * 2) +
1905                 pfkey_xfrm_policy2sec_ctx_size(xp);
1906 }
1907
1908 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1909 {
1910         struct sk_buff *skb;
1911         int size;
1912
1913         size = pfkey_xfrm_policy2msg_size(xp);
1914
1915         skb =  alloc_skb(size + 16, GFP_ATOMIC);
1916         if (skb == NULL)
1917                 return ERR_PTR(-ENOBUFS);
1918
1919         return skb;
1920 }
1921
1922 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1923 {
1924         struct sadb_msg *hdr;
1925         struct sadb_address *addr;
1926         struct sadb_lifetime *lifetime;
1927         struct sadb_x_policy *pol;
1928         struct sockaddr_in   *sin;
1929         struct sadb_x_sec_ctx *sec_ctx;
1930         struct xfrm_sec_ctx *xfrm_ctx;
1931 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1932         struct sockaddr_in6  *sin6;
1933 #endif
1934         int i;
1935         int size;
1936         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1937         int socklen = (xp->family == AF_INET ?
1938                        sizeof(struct sockaddr_in) :
1939                        sizeof(struct sockaddr_in6));
1940
1941         size = pfkey_xfrm_policy2msg_size(xp);
1942
1943         /* call should fill header later */
1944         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1945         memset(hdr, 0, size);   /* XXX do we need this ? */
1946
1947         /* src address */
1948         addr = (struct sadb_address*) skb_put(skb,
1949                                               sizeof(struct sadb_address)+sockaddr_size);
1950         addr->sadb_address_len =
1951                 (sizeof(struct sadb_address)+sockaddr_size)/
1952                         sizeof(uint64_t);
1953         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1954         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1955         addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1956         addr->sadb_address_reserved = 0;
1957         /* src address */
1958         if (xp->family == AF_INET) {
1959                 sin = (struct sockaddr_in *) (addr + 1);
1960                 sin->sin_family = AF_INET;
1961                 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1962                 sin->sin_port = xp->selector.sport;
1963                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1964         }
1965 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1966         else if (xp->family == AF_INET6) {
1967                 sin6 = (struct sockaddr_in6 *) (addr + 1);
1968                 sin6->sin6_family = AF_INET6;
1969                 sin6->sin6_port = xp->selector.sport;
1970                 sin6->sin6_flowinfo = 0;
1971                 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1972                        sizeof(struct in6_addr));
1973                 sin6->sin6_scope_id = 0;
1974         }
1975 #endif
1976         else
1977                 BUG();
1978
1979         /* dst address */
1980         addr = (struct sadb_address*) skb_put(skb,
1981                                               sizeof(struct sadb_address)+sockaddr_size);
1982         addr->sadb_address_len =
1983                 (sizeof(struct sadb_address)+sockaddr_size)/
1984                         sizeof(uint64_t);
1985         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1986         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1987         addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1988         addr->sadb_address_reserved = 0;
1989         if (xp->family == AF_INET) {
1990                 sin = (struct sockaddr_in *) (addr + 1);
1991                 sin->sin_family = AF_INET;
1992                 sin->sin_addr.s_addr = xp->selector.daddr.a4;
1993                 sin->sin_port = xp->selector.dport;
1994                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1995         }
1996 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1997         else if (xp->family == AF_INET6) {
1998                 sin6 = (struct sockaddr_in6 *) (addr + 1);
1999                 sin6->sin6_family = AF_INET6;
2000                 sin6->sin6_port = xp->selector.dport;
2001                 sin6->sin6_flowinfo = 0;
2002                 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2003                        sizeof(struct in6_addr));
2004                 sin6->sin6_scope_id = 0;
2005         }
2006 #endif
2007         else
2008                 BUG();
2009
2010         /* hard time */
2011         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2012                                                      sizeof(struct sadb_lifetime));
2013         lifetime->sadb_lifetime_len =
2014                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2015         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2016         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.hard_packet_limit);
2017         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2018         lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2019         lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2020         /* soft time */
2021         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2022                                                      sizeof(struct sadb_lifetime));
2023         lifetime->sadb_lifetime_len =
2024                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2025         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2026         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.soft_packet_limit);
2027         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2028         lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2029         lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2030         /* current time */
2031         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2032                                                      sizeof(struct sadb_lifetime));
2033         lifetime->sadb_lifetime_len =
2034                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2035         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2036         lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2037         lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2038         lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2039         lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2040
2041         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
2042         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2043         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2044         pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2045         if (xp->action == XFRM_POLICY_ALLOW) {
2046                 if (xp->xfrm_nr)
2047                         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2048                 else
2049                         pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2050         }
2051         pol->sadb_x_policy_dir = dir+1;
2052         pol->sadb_x_policy_id = xp->index;
2053         pol->sadb_x_policy_priority = xp->priority;
2054
2055         for (i=0; i<xp->xfrm_nr; i++) {
2056                 struct sadb_x_ipsecrequest *rq;
2057                 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2058                 int req_size;
2059                 int mode;
2060
2061                 req_size = sizeof(struct sadb_x_ipsecrequest);
2062                 if (t->mode == XFRM_MODE_TUNNEL)
2063                         req_size += ((t->encap_family == AF_INET ?
2064                                      sizeof(struct sockaddr_in) :
2065                                      sizeof(struct sockaddr_in6)) * 2);
2066                 else
2067                         size -= 2*socklen;
2068                 rq = (void*)skb_put(skb, req_size);
2069                 pol->sadb_x_policy_len += req_size/8;
2070                 memset(rq, 0, sizeof(*rq));
2071                 rq->sadb_x_ipsecrequest_len = req_size;
2072                 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2073                 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2074                         return -EINVAL;
2075                 rq->sadb_x_ipsecrequest_mode = mode;
2076                 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2077                 if (t->reqid)
2078                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2079                 if (t->optional)
2080                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2081                 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2082                 if (t->mode == XFRM_MODE_TUNNEL) {
2083                         switch (t->encap_family) {
2084                         case AF_INET:
2085                                 sin = (void*)(rq+1);
2086                                 sin->sin_family = AF_INET;
2087                                 sin->sin_addr.s_addr = t->saddr.a4;
2088                                 sin->sin_port = 0;
2089                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2090                                 sin++;
2091                                 sin->sin_family = AF_INET;
2092                                 sin->sin_addr.s_addr = t->id.daddr.a4;
2093                                 sin->sin_port = 0;
2094                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2095                                 break;
2096 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2097                         case AF_INET6:
2098                                 sin6 = (void*)(rq+1);
2099                                 sin6->sin6_family = AF_INET6;
2100                                 sin6->sin6_port = 0;
2101                                 sin6->sin6_flowinfo = 0;
2102                                 memcpy(&sin6->sin6_addr, t->saddr.a6,
2103                                        sizeof(struct in6_addr));
2104                                 sin6->sin6_scope_id = 0;
2105
2106                                 sin6++;
2107                                 sin6->sin6_family = AF_INET6;
2108                                 sin6->sin6_port = 0;
2109                                 sin6->sin6_flowinfo = 0;
2110                                 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2111                                        sizeof(struct in6_addr));
2112                                 sin6->sin6_scope_id = 0;
2113                                 break;
2114 #endif
2115                         default:
2116                                 break;
2117                         }
2118                 }
2119         }
2120
2121         /* security context */
2122         if ((xfrm_ctx = xp->security)) {
2123                 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2124
2125                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2126                 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2127                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2128                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2129                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2130                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2131                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2132                        xfrm_ctx->ctx_len);
2133         }
2134
2135         hdr->sadb_msg_len = size / sizeof(uint64_t);
2136         hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2137
2138         return 0;
2139 }
2140
2141 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2142 {
2143         struct sk_buff *out_skb;
2144         struct sadb_msg *out_hdr;
2145         int err;
2146
2147         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2148         if (IS_ERR(out_skb)) {
2149                 err = PTR_ERR(out_skb);
2150                 goto out;
2151         }
2152         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2153         if (err < 0)
2154                 return err;
2155
2156         out_hdr = (struct sadb_msg *) out_skb->data;
2157         out_hdr->sadb_msg_version = PF_KEY_V2;
2158
2159         if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2160                 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2161         else
2162                 out_hdr->sadb_msg_type = event2poltype(c->event);
2163         out_hdr->sadb_msg_errno = 0;
2164         out_hdr->sadb_msg_seq = c->seq;
2165         out_hdr->sadb_msg_pid = c->pid;
2166         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2167 out:
2168         return 0;
2169
2170 }
2171
2172 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2173 {
2174         int err = 0;
2175         struct sadb_lifetime *lifetime;
2176         struct sadb_address *sa;
2177         struct sadb_x_policy *pol;
2178         struct xfrm_policy *xp;
2179         struct km_event c;
2180         struct sadb_x_sec_ctx *sec_ctx;
2181
2182         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2183                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2184             !ext_hdrs[SADB_X_EXT_POLICY-1])
2185                 return -EINVAL;
2186
2187         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2188         if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2189                 return -EINVAL;
2190         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2191                 return -EINVAL;
2192
2193         xp = xfrm_policy_alloc(GFP_KERNEL);
2194         if (xp == NULL)
2195                 return -ENOBUFS;
2196
2197         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2198                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2199         xp->priority = pol->sadb_x_policy_priority;
2200
2201         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2202         xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2203         if (!xp->family) {
2204                 err = -EINVAL;
2205                 goto out;
2206         }
2207         xp->selector.family = xp->family;
2208         xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2209         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2210         xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2211         if (xp->selector.sport)
2212                 xp->selector.sport_mask = htons(0xffff);
2213
2214         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2215         pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2216         xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2217
2218         /* Amusing, we set this twice.  KAME apps appear to set same value
2219          * in both addresses.
2220          */
2221         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2222
2223         xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2224         if (xp->selector.dport)
2225                 xp->selector.dport_mask = htons(0xffff);
2226
2227         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2228         if (sec_ctx != NULL) {
2229                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2230
2231                 if (!uctx) {
2232                         err = -ENOBUFS;
2233                         goto out;
2234                 }
2235
2236                 err = security_xfrm_policy_alloc(xp, uctx);
2237                 kfree(uctx);
2238
2239                 if (err)
2240                         goto out;
2241         }
2242
2243         xp->lft.soft_byte_limit = XFRM_INF;
2244         xp->lft.hard_byte_limit = XFRM_INF;
2245         xp->lft.soft_packet_limit = XFRM_INF;
2246         xp->lft.hard_packet_limit = XFRM_INF;
2247         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2248                 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2249                 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2250                 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2251                 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2252         }
2253         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2254                 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2255                 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2256                 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2257                 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2258         }
2259         xp->xfrm_nr = 0;
2260         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2261             (err = parse_ipsecrequests(xp, pol)) < 0)
2262                 goto out;
2263
2264         err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2265                                  hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2266
2267         xfrm_audit_policy_add(xp, err ? 0 : 1,
2268                              audit_get_loginuid(current->audit_context), 0);
2269
2270         if (err)
2271                 goto out;
2272
2273         if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2274                 c.event = XFRM_MSG_UPDPOLICY;
2275         else
2276                 c.event = XFRM_MSG_NEWPOLICY;
2277
2278         c.seq = hdr->sadb_msg_seq;
2279         c.pid = hdr->sadb_msg_pid;
2280
2281         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2282         xfrm_pol_put(xp);
2283         return 0;
2284
2285 out:
2286         security_xfrm_policy_free(xp);
2287         kfree(xp);
2288         return err;
2289 }
2290
2291 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2292 {
2293         int err;
2294         struct sadb_address *sa;
2295         struct sadb_x_policy *pol;
2296         struct xfrm_policy *xp, tmp;
2297         struct xfrm_selector sel;
2298         struct km_event c;
2299         struct sadb_x_sec_ctx *sec_ctx;
2300
2301         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2302                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2303             !ext_hdrs[SADB_X_EXT_POLICY-1])
2304                 return -EINVAL;
2305
2306         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2307         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2308                 return -EINVAL;
2309
2310         memset(&sel, 0, sizeof(sel));
2311
2312         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2313         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2314         sel.prefixlen_s = sa->sadb_address_prefixlen;
2315         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2316         sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2317         if (sel.sport)
2318                 sel.sport_mask = htons(0xffff);
2319
2320         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2321         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2322         sel.prefixlen_d = sa->sadb_address_prefixlen;
2323         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2324         sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2325         if (sel.dport)
2326                 sel.dport_mask = htons(0xffff);
2327
2328         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2329         memset(&tmp, 0, sizeof(struct xfrm_policy));
2330
2331         if (sec_ctx != NULL) {
2332                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2333
2334                 if (!uctx)
2335                         return -ENOMEM;
2336
2337                 err = security_xfrm_policy_alloc(&tmp, uctx);
2338                 kfree(uctx);
2339
2340                 if (err)
2341                         return err;
2342         }
2343
2344         xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
2345                                    &sel, tmp.security, 1, &err);
2346         security_xfrm_policy_free(&tmp);
2347
2348         if (xp == NULL)
2349                 return -ENOENT;
2350
2351         xfrm_audit_policy_delete(xp, err ? 0 : 1,
2352                                 audit_get_loginuid(current->audit_context), 0);
2353
2354         if (err)
2355                 goto out;
2356
2357         c.seq = hdr->sadb_msg_seq;
2358         c.pid = hdr->sadb_msg_pid;
2359         c.event = XFRM_MSG_DELPOLICY;
2360         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2361
2362 out:
2363         xfrm_pol_put(xp);
2364         return err;
2365 }
2366
2367 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2368 {
2369         int err;
2370         struct sk_buff *out_skb;
2371         struct sadb_msg *out_hdr;
2372         err = 0;
2373
2374         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2375         if (IS_ERR(out_skb)) {
2376                 err =  PTR_ERR(out_skb);
2377                 goto out;
2378         }
2379         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2380         if (err < 0)
2381                 goto out;
2382
2383         out_hdr = (struct sadb_msg *) out_skb->data;
2384         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2385         out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2386         out_hdr->sadb_msg_satype = 0;
2387         out_hdr->sadb_msg_errno = 0;
2388         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2389         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2390         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2391         err = 0;
2392
2393 out:
2394         return err;
2395 }
2396
2397 #ifdef CONFIG_NET_KEY_MIGRATE
2398 static int pfkey_sockaddr_pair_size(sa_family_t family)
2399 {
2400         switch (family) {
2401         case AF_INET:
2402                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2403 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2404         case AF_INET6:
2405                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2406 #endif
2407         default:
2408                 return 0;
2409         }
2410         /* NOTREACHED */
2411 }
2412
2413 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2414                                xfrm_address_t *saddr, xfrm_address_t *daddr,
2415                                u16 *family)
2416 {
2417         struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2418         if (rq->sadb_x_ipsecrequest_len <
2419             pfkey_sockaddr_pair_size(sa->sa_family))
2420                 return -EINVAL;
2421
2422         switch (sa->sa_family) {
2423         case AF_INET:
2424                 {
2425                         struct sockaddr_in *sin;
2426                         sin = (struct sockaddr_in *)sa;
2427                         if ((sin+1)->sin_family != AF_INET)
2428                                 return -EINVAL;
2429                         memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2430                         sin++;
2431                         memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2432                         *family = AF_INET;
2433                         break;
2434                 }
2435 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2436         case AF_INET6:
2437                 {
2438                         struct sockaddr_in6 *sin6;
2439                         sin6 = (struct sockaddr_in6 *)sa;
2440                         if ((sin6+1)->sin6_family != AF_INET6)
2441                                 return -EINVAL;
2442                         memcpy(&saddr->a6, &sin6->sin6_addr,
2443                                sizeof(saddr->a6));
2444                         sin6++;
2445                         memcpy(&daddr->a6, &sin6->sin6_addr,
2446                                sizeof(daddr->a6));
2447                         *family = AF_INET6;
2448                         break;
2449                 }
2450 #endif
2451         default:
2452                 return -EINVAL;
2453         }
2454
2455         return 0;
2456 }
2457
2458 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2459                                     struct xfrm_migrate *m)
2460 {
2461         int err;
2462         struct sadb_x_ipsecrequest *rq2;
2463         int mode;
2464
2465         if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2466             len < rq1->sadb_x_ipsecrequest_len)
2467                 return -EINVAL;
2468
2469         /* old endoints */
2470         err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2471                                   &m->old_family);
2472         if (err)
2473                 return err;
2474
2475         rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2476         len -= rq1->sadb_x_ipsecrequest_len;
2477
2478         if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2479             len < rq2->sadb_x_ipsecrequest_len)
2480                 return -EINVAL;
2481
2482         /* new endpoints */
2483         err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2484                                   &m->new_family);
2485         if (err)
2486                 return err;
2487
2488         if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2489             rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2490             rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2491                 return -EINVAL;
2492
2493         m->proto = rq1->sadb_x_ipsecrequest_proto;
2494         if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2495                 return -EINVAL;
2496         m->mode = mode;
2497         m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2498
2499         return ((int)(rq1->sadb_x_ipsecrequest_len +
2500                       rq2->sadb_x_ipsecrequest_len));
2501 }
2502
2503 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2504                          struct sadb_msg *hdr, void **ext_hdrs)
2505 {
2506         int i, len, ret, err = -EINVAL;
2507         u8 dir;
2508         struct sadb_address *sa;
2509         struct sadb_x_policy *pol;
2510         struct sadb_x_ipsecrequest *rq;
2511         struct xfrm_selector sel;
2512         struct xfrm_migrate m[XFRM_MAX_DEPTH];
2513
2514         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2515             ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2516             !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2517                 err = -EINVAL;
2518                 goto out;
2519         }
2520
2521         pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2522         if (!pol) {
2523                 err = -EINVAL;
2524                 goto out;
2525         }
2526
2527         if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2528                 err = -EINVAL;
2529                 goto out;
2530         }
2531
2532         dir = pol->sadb_x_policy_dir - 1;
2533         memset(&sel, 0, sizeof(sel));
2534
2535         /* set source address info of selector */
2536         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2537         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2538         sel.prefixlen_s = sa->sadb_address_prefixlen;
2539         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2540         sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2541         if (sel.sport)
2542                 sel.sport_mask = htons(0xffff);
2543
2544         /* set destination address info of selector */
2545         sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2546         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2547         sel.prefixlen_d = sa->sadb_address_prefixlen;
2548         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2549         sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2550         if (sel.dport)
2551                 sel.dport_mask = htons(0xffff);
2552
2553         rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2554
2555         /* extract ipsecrequests */
2556         i = 0;
2557         len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2558
2559         while (len > 0 && i < XFRM_MAX_DEPTH) {
2560                 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2561                 if (ret < 0) {
2562                         err = ret;
2563                         goto out;
2564                 } else {
2565                         rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2566                         len -= ret;
2567                         i++;
2568                 }
2569         }
2570
2571         if (!i || len > 0) {
2572                 err = -EINVAL;
2573                 goto out;
2574         }
2575
2576         return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2577
2578  out:
2579         return err;
2580 }
2581 #else
2582 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2583                          struct sadb_msg *hdr, void **ext_hdrs)
2584 {
2585         return -ENOPROTOOPT;
2586 }
2587 #endif
2588
2589
2590 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2591 {
2592         unsigned int dir;
2593         int err = 0, delete;
2594         struct sadb_x_policy *pol;
2595         struct xfrm_policy *xp;
2596         struct km_event c;
2597
2598         if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2599                 return -EINVAL;
2600
2601         dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2602         if (dir >= XFRM_POLICY_MAX)
2603                 return -EINVAL;
2604
2605         delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2606         xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2607                               delete, &err);
2608         if (xp == NULL)
2609                 return -ENOENT;
2610
2611         if (delete) {
2612                 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2613                                 audit_get_loginuid(current->audit_context), 0);
2614
2615                 if (err)
2616                         goto out;
2617                 c.seq = hdr->sadb_msg_seq;
2618                 c.pid = hdr->sadb_msg_pid;
2619                 c.data.byid = 1;
2620                 c.event = XFRM_MSG_DELPOLICY;
2621                 km_policy_notify(xp, dir, &c);
2622         } else {
2623                 err = key_pol_get_resp(sk, xp, hdr, dir);
2624         }
2625
2626 out:
2627         xfrm_pol_put(xp);
2628         return err;
2629 }
2630
2631 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2632 {
2633         struct pfkey_dump_data *data = ptr;
2634         struct sk_buff *out_skb;
2635         struct sadb_msg *out_hdr;
2636         int err;
2637
2638         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2639         if (IS_ERR(out_skb))
2640                 return PTR_ERR(out_skb);
2641
2642         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2643         if (err < 0)
2644                 return err;
2645
2646         out_hdr = (struct sadb_msg *) out_skb->data;
2647         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2648         out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2649         out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2650         out_hdr->sadb_msg_errno = 0;
2651         out_hdr->sadb_msg_seq = count;
2652         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2653         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2654         return 0;
2655 }
2656
2657 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2658 {
2659         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2660
2661         return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data);
2662 }
2663
2664 static int key_notify_policy_flush(struct km_event *c)
2665 {
2666         struct sk_buff *skb_out;
2667         struct sadb_msg *hdr;
2668
2669         skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2670         if (!skb_out)
2671                 return -ENOBUFS;
2672         hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2673         hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2674         hdr->sadb_msg_seq = c->seq;
2675         hdr->sadb_msg_pid = c->pid;
2676         hdr->sadb_msg_version = PF_KEY_V2;
2677         hdr->sadb_msg_errno = (uint8_t) 0;
2678         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2679         pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2680         return 0;
2681
2682 }
2683
2684 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2685 {
2686         struct km_event c;
2687         struct xfrm_audit audit_info;
2688         int err;
2689
2690         audit_info.loginuid = audit_get_loginuid(current->audit_context);
2691         audit_info.secid = 0;
2692         err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2693         if (err)
2694                 return err;
2695         c.data.type = XFRM_POLICY_TYPE_MAIN;
2696         c.event = XFRM_MSG_FLUSHPOLICY;
2697         c.pid = hdr->sadb_msg_pid;
2698         c.seq = hdr->sadb_msg_seq;
2699         km_policy_notify(NULL, 0, &c);
2700
2701         return 0;
2702 }
2703
2704 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2705                              struct sadb_msg *hdr, void **ext_hdrs);
2706 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2707         [SADB_RESERVED]         = pfkey_reserved,
2708         [SADB_GETSPI]           = pfkey_getspi,
2709         [SADB_UPDATE]           = pfkey_add,
2710         [SADB_ADD]              = pfkey_add,
2711         [SADB_DELETE]           = pfkey_delete,
2712         [SADB_GET]              = pfkey_get,
2713         [SADB_ACQUIRE]          = pfkey_acquire,
2714         [SADB_REGISTER]         = pfkey_register,
2715         [SADB_EXPIRE]           = NULL,
2716         [SADB_FLUSH]            = pfkey_flush,
2717         [SADB_DUMP]             = pfkey_dump,
2718         [SADB_X_PROMISC]        = pfkey_promisc,
2719         [SADB_X_PCHANGE]        = NULL,
2720         [SADB_X_SPDUPDATE]      = pfkey_spdadd,
2721         [SADB_X_SPDADD]         = pfkey_spdadd,
2722         [SADB_X_SPDDELETE]      = pfkey_spddelete,
2723         [SADB_X_SPDGET]         = pfkey_spdget,
2724         [SADB_X_SPDACQUIRE]     = NULL,
2725         [SADB_X_SPDDUMP]        = pfkey_spddump,
2726         [SADB_X_SPDFLUSH]       = pfkey_spdflush,
2727         [SADB_X_SPDSETIDX]      = pfkey_spdadd,
2728         [SADB_X_SPDDELETE2]     = pfkey_spdget,
2729         [SADB_X_MIGRATE]        = pfkey_migrate,
2730 };
2731
2732 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2733 {
2734         void *ext_hdrs[SADB_EXT_MAX];
2735         int err;
2736
2737         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2738                         BROADCAST_PROMISC_ONLY, NULL);
2739
2740         memset(ext_hdrs, 0, sizeof(ext_hdrs));
2741         err = parse_exthdrs(skb, hdr, ext_hdrs);
2742         if (!err) {
2743                 err = -EOPNOTSUPP;
2744                 if (pfkey_funcs[hdr->sadb_msg_type])
2745                         err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2746         }
2747         return err;
2748 }
2749
2750 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2751 {
2752         struct sadb_msg *hdr = NULL;
2753
2754         if (skb->len < sizeof(*hdr)) {
2755                 *errp = -EMSGSIZE;
2756         } else {
2757                 hdr = (struct sadb_msg *) skb->data;
2758                 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2759                     hdr->sadb_msg_reserved != 0 ||
2760                     (hdr->sadb_msg_type <= SADB_RESERVED ||
2761                      hdr->sadb_msg_type > SADB_MAX)) {
2762                         hdr = NULL;
2763                         *errp = -EINVAL;
2764                 } else if (hdr->sadb_msg_len != (skb->len /
2765                                                  sizeof(uint64_t)) ||
2766                            hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2767                                                 sizeof(uint64_t))) {
2768                         hdr = NULL;
2769                         *errp = -EMSGSIZE;
2770                 } else {
2771                         *errp = 0;
2772                 }
2773         }
2774         return hdr;
2775 }
2776
2777 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2778 {
2779         return t->aalgos & (1 << d->desc.sadb_alg_id);
2780 }
2781
2782 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2783 {
2784         return t->ealgos & (1 << d->desc.sadb_alg_id);
2785 }
2786
2787 static int count_ah_combs(struct xfrm_tmpl *t)
2788 {
2789         int i, sz = 0;
2790
2791         for (i = 0; ; i++) {
2792                 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2793                 if (!aalg)
2794                         break;
2795                 if (aalg_tmpl_set(t, aalg) && aalg->available)
2796                         sz += sizeof(struct sadb_comb);
2797         }
2798         return sz + sizeof(struct sadb_prop);
2799 }
2800
2801 static int count_esp_combs(struct xfrm_tmpl *t)
2802 {
2803         int i, k, sz = 0;
2804
2805         for (i = 0; ; i++) {
2806                 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2807                 if (!ealg)
2808                         break;
2809
2810                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2811                         continue;
2812
2813                 for (k = 1; ; k++) {
2814                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2815                         if (!aalg)
2816                                 break;
2817
2818                         if (aalg_tmpl_set(t, aalg) && aalg->available)
2819                                 sz += sizeof(struct sadb_comb);
2820                 }
2821         }
2822         return sz + sizeof(struct sadb_prop);
2823 }
2824
2825 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2826 {
2827         struct sadb_prop *p;
2828         int i;
2829
2830         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2831         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2832         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2833         p->sadb_prop_replay = 32;
2834         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2835
2836         for (i = 0; ; i++) {
2837                 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2838                 if (!aalg)
2839                         break;
2840
2841                 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2842                         struct sadb_comb *c;
2843                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2844                         memset(c, 0, sizeof(*c));
2845                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2846                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2847                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2848                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2849                         c->sadb_comb_hard_addtime = 24*60*60;
2850                         c->sadb_comb_soft_addtime = 20*60*60;
2851                         c->sadb_comb_hard_usetime = 8*60*60;
2852                         c->sadb_comb_soft_usetime = 7*60*60;
2853                 }
2854         }
2855 }
2856
2857 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2858 {
2859         struct sadb_prop *p;
2860         int i, k;
2861
2862         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2863         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2864         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2865         p->sadb_prop_replay = 32;
2866         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2867
2868         for (i=0; ; i++) {
2869                 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2870                 if (!ealg)
2871                         break;
2872
2873                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2874                         continue;
2875
2876                 for (k = 1; ; k++) {
2877                         struct sadb_comb *c;
2878                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2879                         if (!aalg)
2880                                 break;
2881                         if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2882                                 continue;
2883                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2884                         memset(c, 0, sizeof(*c));
2885                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2886                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2887                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2888                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2889                         c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2890                         c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2891                         c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2892                         c->sadb_comb_hard_addtime = 24*60*60;
2893                         c->sadb_comb_soft_addtime = 20*60*60;
2894                         c->sadb_comb_hard_usetime = 8*60*60;
2895                         c->sadb_comb_soft_usetime = 7*60*60;
2896                 }
2897         }
2898 }
2899
2900 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2901 {
2902         return 0;
2903 }
2904
2905 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2906 {
2907         struct sk_buff *out_skb;
2908         struct sadb_msg *out_hdr;
2909         int hard;
2910         int hsc;
2911
2912         hard = c->data.hard;
2913         if (hard)
2914                 hsc = 2;
2915         else
2916                 hsc = 1;
2917
2918         out_skb = pfkey_xfrm_state2msg(x, 0, hsc);
2919         if (IS_ERR(out_skb))
2920                 return PTR_ERR(out_skb);
2921
2922         out_hdr = (struct sadb_msg *) out_skb->data;
2923         out_hdr->sadb_msg_version = PF_KEY_V2;
2924         out_hdr->sadb_msg_type = SADB_EXPIRE;
2925         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2926         out_hdr->sadb_msg_errno = 0;
2927         out_hdr->sadb_msg_reserved = 0;
2928         out_hdr->sadb_msg_seq = 0;
2929         out_hdr->sadb_msg_pid = 0;
2930
2931         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2932         return 0;
2933 }
2934
2935 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2936 {
2937         switch (c->event) {
2938         case XFRM_MSG_EXPIRE:
2939                 return key_notify_sa_expire(x, c);
2940         case XFRM_MSG_DELSA:
2941         case XFRM_MSG_NEWSA:
2942         case XFRM_MSG_UPDSA:
2943                 return key_notify_sa(x, c);
2944         case XFRM_MSG_FLUSHSA:
2945                 return key_notify_sa_flush(c);
2946         case XFRM_MSG_NEWAE: /* not yet supported */
2947                 break;
2948         default:
2949                 printk("pfkey: Unknown SA event %d\n", c->event);
2950                 break;
2951         }
2952
2953         return 0;
2954 }
2955
2956 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2957 {
2958         if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2959                 return 0;
2960
2961         switch (c->event) {
2962         case XFRM_MSG_POLEXPIRE:
2963                 return key_notify_policy_expire(xp, c);
2964         case XFRM_MSG_DELPOLICY:
2965         case XFRM_MSG_NEWPOLICY:
2966         case XFRM_MSG_UPDPOLICY:
2967                 return key_notify_policy(xp, dir, c);
2968         case XFRM_MSG_FLUSHPOLICY:
2969                 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2970                         break;
2971                 return key_notify_policy_flush(c);
2972         default:
2973                 printk("pfkey: Unknown policy event %d\n", c->event);
2974                 break;
2975         }
2976
2977         return 0;
2978 }
2979
2980 static u32 get_acqseq(void)
2981 {
2982         u32 res;
2983         static u32 acqseq;
2984         static DEFINE_SPINLOCK(acqseq_lock);
2985
2986         spin_lock_bh(&acqseq_lock);
2987         res = (++acqseq ? : ++acqseq);
2988         spin_unlock_bh(&acqseq_lock);
2989         return res;
2990 }
2991
2992 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
2993 {
2994         struct sk_buff *skb;
2995         struct sadb_msg *hdr;
2996         struct sadb_address *addr;
2997         struct sadb_x_policy *pol;
2998         struct sockaddr_in *sin;
2999 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3000         struct sockaddr_in6 *sin6;
3001 #endif
3002         int sockaddr_size;
3003         int size;
3004         struct sadb_x_sec_ctx *sec_ctx;
3005         struct xfrm_sec_ctx *xfrm_ctx;
3006         int ctx_size = 0;
3007
3008         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3009         if (!sockaddr_size)
3010                 return -EINVAL;
3011
3012         size = sizeof(struct sadb_msg) +
3013                 (sizeof(struct sadb_address) * 2) +
3014                 (sockaddr_size * 2) +
3015                 sizeof(struct sadb_x_policy);
3016
3017         if (x->id.proto == IPPROTO_AH)
3018                 size += count_ah_combs(t);
3019         else if (x->id.proto == IPPROTO_ESP)
3020                 size += count_esp_combs(t);
3021
3022         if ((xfrm_ctx = x->security)) {
3023                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3024                 size +=  sizeof(struct sadb_x_sec_ctx) + ctx_size;
3025         }
3026
3027         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3028         if (skb == NULL)
3029                 return -ENOMEM;
3030
3031         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3032         hdr->sadb_msg_version = PF_KEY_V2;
3033         hdr->sadb_msg_type = SADB_ACQUIRE;
3034         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3035         hdr->sadb_msg_len = size / sizeof(uint64_t);
3036         hdr->sadb_msg_errno = 0;
3037         hdr->sadb_msg_reserved = 0;
3038         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3039         hdr->sadb_msg_pid = 0;
3040
3041         /* src address */
3042         addr = (struct sadb_address*) skb_put(skb,
3043                                               sizeof(struct sadb_address)+sockaddr_size);
3044         addr->sadb_address_len =
3045                 (sizeof(struct sadb_address)+sockaddr_size)/
3046                         sizeof(uint64_t);
3047         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3048         addr->sadb_address_proto = 0;
3049         addr->sadb_address_reserved = 0;
3050         if (x->props.family == AF_INET) {
3051                 addr->sadb_address_prefixlen = 32;
3052
3053                 sin = (struct sockaddr_in *) (addr + 1);
3054                 sin->sin_family = AF_INET;
3055                 sin->sin_addr.s_addr = x->props.saddr.a4;
3056                 sin->sin_port = 0;
3057                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3058         }
3059 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3060         else if (x->props.family == AF_INET6) {
3061                 addr->sadb_address_prefixlen = 128;
3062
3063                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3064                 sin6->sin6_family = AF_INET6;
3065                 sin6->sin6_port = 0;
3066                 sin6->sin6_flowinfo = 0;
3067                 memcpy(&sin6->sin6_addr,
3068                        x->props.saddr.a6, sizeof(struct in6_addr));
3069                 sin6->sin6_scope_id = 0;
3070         }
3071 #endif
3072         else
3073                 BUG();
3074
3075         /* dst address */
3076         addr = (struct sadb_address*) skb_put(skb,
3077                                               sizeof(struct sadb_address)+sockaddr_size);
3078         addr->sadb_address_len =
3079                 (sizeof(struct sadb_address)+sockaddr_size)/
3080                         sizeof(uint64_t);
3081         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3082         addr->sadb_address_proto = 0;
3083         addr->sadb_address_reserved = 0;
3084         if (x->props.family == AF_INET) {
3085                 addr->sadb_address_prefixlen = 32;
3086
3087                 sin = (struct sockaddr_in *) (addr + 1);
3088                 sin->sin_family = AF_INET;
3089                 sin->sin_addr.s_addr = x->id.daddr.a4;
3090                 sin->sin_port = 0;
3091                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3092         }
3093 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3094         else if (x->props.family == AF_INET6) {
3095                 addr->sadb_address_prefixlen = 128;
3096
3097                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3098                 sin6->sin6_family = AF_INET6;
3099                 sin6->sin6_port = 0;
3100                 sin6->sin6_flowinfo = 0;
3101                 memcpy(&sin6->sin6_addr,
3102                        x->id.daddr.a6, sizeof(struct in6_addr));
3103                 sin6->sin6_scope_id = 0;
3104         }
3105 #endif
3106         else
3107                 BUG();
3108
3109         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
3110         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3111         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3112         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3113         pol->sadb_x_policy_dir = dir+1;
3114         pol->sadb_x_policy_id = xp->index;
3115
3116         /* Set sadb_comb's. */
3117         if (x->id.proto == IPPROTO_AH)
3118                 dump_ah_combs(skb, t);
3119         else if (x->id.proto == IPPROTO_ESP)
3120                 dump_esp_combs(skb, t);
3121
3122         /* security context */
3123         if (xfrm_ctx) {
3124                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3125                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3126                 sec_ctx->sadb_x_sec_len =
3127                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3128                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3129                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3130                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3131                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3132                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3133                        xfrm_ctx->ctx_len);
3134         }
3135
3136         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3137 }
3138
3139 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3140                                                 u8 *data, int len, int *dir)
3141 {
3142         struct xfrm_policy *xp;
3143         struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3144         struct sadb_x_sec_ctx *sec_ctx;
3145
3146         switch (sk->sk_family) {
3147         case AF_INET:
3148                 if (opt != IP_IPSEC_POLICY) {
3149                         *dir = -EOPNOTSUPP;
3150                         return NULL;
3151                 }
3152                 break;
3153 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3154         case AF_INET6:
3155                 if (opt != IPV6_IPSEC_POLICY) {
3156                         *dir = -EOPNOTSUPP;
3157                         return NULL;
3158                 }
3159                 break;
3160 #endif
3161         default:
3162                 *dir = -EINVAL;
3163                 return NULL;
3164         }
3165
3166         *dir = -EINVAL;
3167
3168         if (len < sizeof(struct sadb_x_policy) ||
3169             pol->sadb_x_policy_len*8 > len ||
3170             pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3171             (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3172                 return NULL;
3173
3174         xp = xfrm_policy_alloc(GFP_ATOMIC);
3175         if (xp == NULL) {
3176                 *dir = -ENOBUFS;
3177                 return NULL;
3178         }
3179
3180         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3181                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3182
3183         xp->lft.soft_byte_limit = XFRM_INF;
3184         xp->lft.hard_byte_limit = XFRM_INF;
3185         xp->lft.soft_packet_limit = XFRM_INF;
3186         xp->lft.hard_packet_limit = XFRM_INF;
3187         xp->family = sk->sk_family;
3188
3189         xp->xfrm_nr = 0;
3190         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3191             (*dir = parse_ipsecrequests(xp, pol)) < 0)
3192                 goto out;
3193
3194         /* security context too */
3195         if (len >= (pol->sadb_x_policy_len*8 +
3196             sizeof(struct sadb_x_sec_ctx))) {
3197                 char *p = (char *)pol;
3198                 struct xfrm_user_sec_ctx *uctx;
3199
3200                 p += pol->sadb_x_policy_len*8;
3201                 sec_ctx = (struct sadb_x_sec_ctx *)p;
3202                 if (len < pol->sadb_x_policy_len*8 +
3203                     sec_ctx->sadb_x_sec_len) {
3204                         *dir = -EINVAL;
3205                         goto out;
3206                 }
3207                 if ((*dir = verify_sec_ctx_len(p)))
3208                         goto out;
3209                 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3210                 *dir = security_xfrm_policy_alloc(xp, uctx);
3211                 kfree(uctx);
3212
3213                 if (*dir)
3214                         goto out;
3215         }
3216
3217         *dir = pol->sadb_x_policy_dir-1;
3218         return xp;
3219
3220 out:
3221         security_xfrm_policy_free(xp);
3222         kfree(xp);
3223         return NULL;
3224 }
3225
3226 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3227 {
3228         struct sk_buff *skb;
3229         struct sadb_msg *hdr;
3230         struct sadb_sa *sa;
3231         struct sadb_address *addr;
3232         struct sadb_x_nat_t_port *n_port;
3233         struct sockaddr_in *sin;
3234 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3235         struct sockaddr_in6 *sin6;
3236 #endif
3237         int sockaddr_size;
3238         int size;
3239         __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3240         struct xfrm_encap_tmpl *natt = NULL;
3241
3242         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3243         if (!sockaddr_size)
3244                 return -EINVAL;
3245
3246         if (!satype)
3247                 return -EINVAL;
3248
3249         if (!x->encap)
3250                 return -EINVAL;
3251
3252         natt = x->encap;
3253
3254         /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3255          *
3256          * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3257          * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3258          */
3259
3260         size = sizeof(struct sadb_msg) +
3261                 sizeof(struct sadb_sa) +
3262                 (sizeof(struct sadb_address) * 2) +
3263                 (sockaddr_size * 2) +
3264                 (sizeof(struct sadb_x_nat_t_port) * 2);
3265
3266         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3267         if (skb == NULL)
3268                 return -ENOMEM;
3269
3270         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3271         hdr->sadb_msg_version = PF_KEY_V2;
3272         hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3273         hdr->sadb_msg_satype = satype;
3274         hdr->sadb_msg_len = size / sizeof(uint64_t);
3275         hdr->sadb_msg_errno = 0;
3276         hdr->sadb_msg_reserved = 0;
3277         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3278         hdr->sadb_msg_pid = 0;
3279
3280         /* SA */
3281         sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3282         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3283         sa->sadb_sa_exttype = SADB_EXT_SA;
3284         sa->sadb_sa_spi = x->id.spi;
3285         sa->sadb_sa_replay = 0;
3286         sa->sadb_sa_state = 0;
3287         sa->sadb_sa_auth = 0;
3288         sa->sadb_sa_encrypt = 0;
3289         sa->sadb_sa_flags = 0;
3290
3291         /* ADDRESS_SRC (old addr) */
3292         addr = (struct sadb_address*)
3293                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3294         addr->sadb_address_len =
3295                 (sizeof(struct sadb_address)+sockaddr_size)/
3296                         sizeof(uint64_t);
3297         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3298         addr->sadb_address_proto = 0;
3299         addr->sadb_address_reserved = 0;
3300         if (x->props.family == AF_INET) {
3301                 addr->sadb_address_prefixlen = 32;
3302
3303                 sin = (struct sockaddr_in *) (addr + 1);
3304                 sin->sin_family = AF_INET;
3305                 sin->sin_addr.s_addr = x->props.saddr.a4;
3306                 sin->sin_port = 0;
3307                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3308         }
3309 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3310         else if (x->props.family == AF_INET6) {
3311                 addr->sadb_address_prefixlen = 128;
3312
3313                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3314                 sin6->sin6_family = AF_INET6;
3315                 sin6->sin6_port = 0;
3316                 sin6->sin6_flowinfo = 0;
3317                 memcpy(&sin6->sin6_addr,
3318                        x->props.saddr.a6, sizeof(struct in6_addr));
3319                 sin6->sin6_scope_id = 0;
3320         }
3321 #endif
3322         else
3323                 BUG();
3324
3325         /* NAT_T_SPORT (old port) */
3326         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3327         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3328         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3329         n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3330         n_port->sadb_x_nat_t_port_reserved = 0;
3331
3332         /* ADDRESS_DST (new addr) */
3333         addr = (struct sadb_address*)
3334                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3335         addr->sadb_address_len =
3336                 (sizeof(struct sadb_address)+sockaddr_size)/
3337                         sizeof(uint64_t);
3338         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3339         addr->sadb_address_proto = 0;
3340         addr->sadb_address_reserved = 0;
3341         if (x->props.family == AF_INET) {
3342                 addr->sadb_address_prefixlen = 32;
3343
3344                 sin = (struct sockaddr_in *) (addr + 1);
3345                 sin->sin_family = AF_INET;
3346                 sin->sin_addr.s_addr = ipaddr->a4;
3347                 sin->sin_port = 0;
3348                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3349         }
3350 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3351         else if (x->props.family == AF_INET6) {
3352                 addr->sadb_address_prefixlen = 128;
3353
3354                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3355                 sin6->sin6_family = AF_INET6;
3356                 sin6->sin6_port = 0;
3357                 sin6->sin6_flowinfo = 0;
3358                 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3359                 sin6->sin6_scope_id = 0;
3360         }
3361 #endif
3362         else
3363                 BUG();
3364
3365         /* NAT_T_DPORT (new port) */
3366         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3367         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3368         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3369         n_port->sadb_x_nat_t_port_port = sport;
3370         n_port->sadb_x_nat_t_port_reserved = 0;
3371
3372         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3373 }
3374
3375 #ifdef CONFIG_NET_KEY_MIGRATE
3376 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3377                             struct xfrm_selector *sel)
3378 {
3379         struct sadb_address *addr;
3380         struct sockaddr_in *sin;
3381 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3382         struct sockaddr_in6 *sin6;
3383 #endif
3384         addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3385         addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3386         addr->sadb_address_exttype = type;
3387         addr->sadb_address_proto = sel->proto;
3388         addr->sadb_address_reserved = 0;
3389
3390         switch (type) {
3391         case SADB_EXT_ADDRESS_SRC:
3392                 if (sel->family == AF_INET) {
3393                         addr->sadb_address_prefixlen = sel->prefixlen_s;
3394                         sin = (struct sockaddr_in *)(addr + 1);
3395                         sin->sin_family = AF_INET;
3396                         memcpy(&sin->sin_addr.s_addr, &sel->saddr,
3397                                sizeof(sin->sin_addr.s_addr));
3398                         sin->sin_port = 0;
3399                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3400                 }
3401 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3402                 else if (sel->family == AF_INET6) {
3403                         addr->sadb_address_prefixlen = sel->prefixlen_s;
3404                         sin6 = (struct sockaddr_in6 *)(addr + 1);
3405                         sin6->sin6_family = AF_INET6;
3406                         sin6->sin6_port = 0;
3407                         sin6->sin6_flowinfo = 0;
3408                         sin6->sin6_scope_id = 0;
3409                         memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr,
3410                                sizeof(sin6->sin6_addr.s6_addr));
3411                 }
3412 #endif
3413                 break;
3414         case SADB_EXT_ADDRESS_DST:
3415                 if (sel->family == AF_INET) {
3416                         addr->sadb_address_prefixlen = sel->prefixlen_d;
3417                         sin = (struct sockaddr_in *)(addr + 1);
3418                         sin->sin_family = AF_INET;
3419                         memcpy(&sin->sin_addr.s_addr, &sel->daddr,
3420                                sizeof(sin->sin_addr.s_addr));
3421                         sin->sin_port = 0;
3422                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3423                 }
3424 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3425                 else if (sel->family == AF_INET6) {
3426                         addr->sadb_address_prefixlen = sel->prefixlen_d;
3427                         sin6 = (struct sockaddr_in6 *)(addr + 1);
3428                         sin6->sin6_family = AF_INET6;
3429                         sin6->sin6_port = 0;
3430                         sin6->sin6_flowinfo = 0;
3431                         sin6->sin6_scope_id = 0;
3432                         memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr,
3433                                sizeof(sin6->sin6_addr.s6_addr));
3434                 }
3435 #endif
3436                 break;
3437         default:
3438                 return -EINVAL;
3439         }
3440
3441         return 0;
3442 }
3443
3444 static int set_ipsecrequest(struct sk_buff *skb,
3445                             uint8_t proto, uint8_t mode, int level,
3446                             uint32_t reqid, uint8_t family,
3447                             xfrm_address_t *src, xfrm_address_t *dst)
3448 {
3449         struct sadb_x_ipsecrequest *rq;
3450         struct sockaddr_in *sin;
3451 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3452         struct sockaddr_in6 *sin6;
3453 #endif
3454         int size_req;
3455
3456         size_req = sizeof(struct sadb_x_ipsecrequest) +
3457                    pfkey_sockaddr_pair_size(family);
3458
3459         rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3460         memset(rq, 0, size_req);
3461         rq->sadb_x_ipsecrequest_len = size_req;
3462         rq->sadb_x_ipsecrequest_proto = proto;
3463         rq->sadb_x_ipsecrequest_mode = mode;
3464         rq->sadb_x_ipsecrequest_level = level;
3465         rq->sadb_x_ipsecrequest_reqid = reqid;
3466
3467         switch (family) {
3468         case AF_INET:
3469                 sin = (struct sockaddr_in *)(rq + 1);
3470                 sin->sin_family = AF_INET;
3471                 memcpy(&sin->sin_addr.s_addr, src,
3472                        sizeof(sin->sin_addr.s_addr));
3473                 sin++;
3474                 sin->sin_family = AF_INET;
3475                 memcpy(&sin->sin_addr.s_addr, dst,
3476                        sizeof(sin->sin_addr.s_addr));
3477                 break;
3478 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3479         case AF_INET6:
3480                 sin6 = (struct sockaddr_in6 *)(rq + 1);
3481                 sin6->sin6_family = AF_INET6;
3482                 sin6->sin6_port = 0;
3483                 sin6->sin6_flowinfo = 0;
3484                 sin6->sin6_scope_id = 0;
3485                 memcpy(&sin6->sin6_addr.s6_addr, src,
3486                        sizeof(sin6->sin6_addr.s6_addr));
3487                 sin6++;
3488                 sin6->sin6_family = AF_INET6;
3489                 sin6->sin6_port = 0;
3490                 sin6->sin6_flowinfo = 0;
3491                 sin6->sin6_scope_id = 0;
3492                 memcpy(&sin6->sin6_addr.s6_addr, dst,
3493                        sizeof(sin6->sin6_addr.s6_addr));
3494                 break;
3495 #endif
3496         default:
3497                 return -EINVAL;
3498         }
3499
3500         return 0;
3501 }
3502 #endif
3503
3504 #ifdef CONFIG_NET_KEY_MIGRATE
3505 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3506                               struct xfrm_migrate *m, int num_bundles)
3507 {
3508         int i;
3509         int sasize_sel;
3510         int size = 0;
3511         int size_pol = 0;
3512         struct sk_buff *skb;
3513         struct sadb_msg *hdr;
3514         struct sadb_x_policy *pol;
3515         struct xfrm_migrate *mp;
3516
3517         if (type != XFRM_POLICY_TYPE_MAIN)
3518                 return 0;
3519
3520         if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3521                 return -EINVAL;
3522
3523         /* selector */
3524         sasize_sel = pfkey_sockaddr_size(sel->family);
3525         if (!sasize_sel)
3526                 return -EINVAL;
3527         size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3528
3529         /* policy info */
3530         size_pol += sizeof(struct sadb_x_policy);
3531
3532         /* ipsecrequests */
3533         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3534                 /* old locator pair */
3535                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3536                             pfkey_sockaddr_pair_size(mp->old_family);
3537                 /* new locator pair */
3538                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3539                             pfkey_sockaddr_pair_size(mp->new_family);
3540         }
3541
3542         size += sizeof(struct sadb_msg) + size_pol;
3543
3544         /* alloc buffer */
3545         skb = alloc_skb(size, GFP_ATOMIC);
3546         if (skb == NULL)
3547                 return -ENOMEM;
3548
3549         hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3550         hdr->sadb_msg_version = PF_KEY_V2;
3551         hdr->sadb_msg_type = SADB_X_MIGRATE;
3552         hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3553         hdr->sadb_msg_len = size / 8;
3554         hdr->sadb_msg_errno = 0;
3555         hdr->sadb_msg_reserved = 0;
3556         hdr->sadb_msg_seq = 0;
3557         hdr->sadb_msg_pid = 0;
3558
3559         /* selector src */
3560         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3561
3562         /* selector dst */
3563         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3564
3565         /* policy information */
3566         pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3567         pol->sadb_x_policy_len = size_pol / 8;
3568         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3569         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3570         pol->sadb_x_policy_dir = dir + 1;
3571         pol->sadb_x_policy_id = 0;
3572         pol->sadb_x_policy_priority = 0;
3573
3574         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3575                 /* old ipsecrequest */
3576                 int mode = pfkey_mode_from_xfrm(mp->mode);
3577                 if (mode < 0)
3578                         return -EINVAL;
3579                 if (set_ipsecrequest(skb, mp->proto, mode,
3580                                      (mp->reqid ?  IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3581                                      mp->reqid, mp->old_family,
3582                                      &mp->old_saddr, &mp->old_daddr) < 0) {
3583                         return -EINVAL;
3584                 }
3585
3586                 /* new ipsecrequest */
3587                 if (set_ipsecrequest(skb, mp->proto, mode,
3588                                      (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3589                                      mp->reqid, mp->new_family,
3590                                      &mp->new_saddr, &mp->new_daddr) < 0) {
3591                         return -EINVAL;
3592                 }
3593         }
3594
3595         /* broadcast migrate message to sockets */
3596         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3597
3598         return 0;
3599 }
3600 #else
3601 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3602                               struct xfrm_migrate *m, int num_bundles)
3603 {
3604         return -ENOPROTOOPT;
3605 }
3606 #endif
3607
3608 static int pfkey_sendmsg(struct kiocb *kiocb,
3609                          struct socket *sock, struct msghdr *msg, size_t len)
3610 {
3611         struct sock *sk = sock->sk;
3612         struct sk_buff *skb = NULL;
3613         struct sadb_msg *hdr = NULL;
3614         int err;
3615
3616         err = -EOPNOTSUPP;
3617         if (msg->msg_flags & MSG_OOB)
3618                 goto out;
3619
3620         err = -EMSGSIZE;
3621         if ((unsigned)len > sk->sk_sndbuf - 32)
3622                 goto out;
3623
3624         err = -ENOBUFS;
3625         skb = alloc_skb(len, GFP_KERNEL);
3626         if (skb == NULL)
3627                 goto out;
3628
3629         err = -EFAULT;
3630         if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3631                 goto out;
3632
3633         hdr = pfkey_get_base_msg(skb, &err);
3634         if (!hdr)
3635                 goto out;
3636
3637         mutex_lock(&xfrm_cfg_mutex);
3638         err = pfkey_process(sk, skb, hdr);
3639         mutex_unlock(&xfrm_cfg_mutex);
3640
3641 out:
3642         if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3643                 err = 0;
3644         if (skb)
3645                 kfree_skb(skb);
3646
3647         return err ? : len;
3648 }
3649
3650 static int pfkey_recvmsg(struct kiocb *kiocb,
3651                          struct socket *sock, struct msghdr *msg, size_t len,
3652                          int flags)
3653 {
3654         struct sock *sk = sock->sk;
3655         struct sk_buff *skb;
3656         int copied, err;
3657
3658         err = -EINVAL;
3659         if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3660                 goto out;
3661
3662         msg->msg_namelen = 0;
3663         skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3664         if (skb == NULL)
3665                 goto out;
3666
3667         copied = skb->len;
3668         if (copied > len) {
3669                 msg->msg_flags |= MSG_TRUNC;
3670                 copied = len;
3671         }
3672
3673         skb_reset_transport_header(skb);
3674         err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3675         if (err)
3676                 goto out_free;
3677
3678         sock_recv_timestamp(msg, sk, skb);
3679
3680         err = (flags & MSG_TRUNC) ? skb->len : copied;
3681
3682 out_free:
3683         skb_free_datagram(sk, skb);
3684 out:
3685         return err;
3686 }
3687
3688 static const struct proto_ops pfkey_ops = {
3689         .family         =       PF_KEY,
3690         .owner          =       THIS_MODULE,
3691         /* Operations that make no sense on pfkey sockets. */
3692         .bind           =       sock_no_bind,
3693         .connect        =       sock_no_connect,
3694         .socketpair     =       sock_no_socketpair,
3695         .accept         =       sock_no_accept,
3696         .getname        =       sock_no_getname,
3697         .ioctl          =       sock_no_ioctl,
3698         .listen         =       sock_no_listen,
3699         .shutdown       =       sock_no_shutdown,
3700         .setsockopt     =       sock_no_setsockopt,
3701         .getsockopt     =       sock_no_getsockopt,
3702         .mmap           =       sock_no_mmap,
3703         .sendpage       =       sock_no_sendpage,
3704
3705         /* Now the operations that really occur. */
3706         .release        =       pfkey_release,
3707         .poll           =       datagram_poll,
3708         .sendmsg        =       pfkey_sendmsg,
3709         .recvmsg        =       pfkey_recvmsg,
3710 };
3711
3712 static struct net_proto_family pfkey_family_ops = {
3713         .family =       PF_KEY,
3714         .create =       pfkey_create,
3715         .owner  =       THIS_MODULE,
3716 };
3717
3718 #ifdef CONFIG_PROC_FS
3719 static int pfkey_read_proc(char *buffer, char **start, off_t offset,
3720                            int length, int *eof, void *data)
3721 {
3722         off_t pos = 0;
3723         off_t begin = 0;
3724         int len = 0;
3725         struct sock *s;
3726         struct hlist_node *node;
3727
3728         len += sprintf(buffer,"sk       RefCnt Rmem   Wmem   User   Inode\n");
3729
3730         read_lock(&pfkey_table_lock);
3731
3732         sk_for_each(s, node, &pfkey_table) {
3733                 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
3734                                s,
3735                                atomic_read(&s->sk_refcnt),
3736                                atomic_read(&s->sk_rmem_alloc),
3737                                atomic_read(&s->sk_wmem_alloc),
3738                                sock_i_uid(s),
3739                                sock_i_ino(s)
3740                                );
3741
3742                 buffer[len++] = '\n';
3743
3744                 pos = begin + len;
3745                 if (pos < offset) {
3746                         len = 0;
3747                         begin = pos;
3748                 }
3749                 if(pos > offset + length)
3750                         goto done;
3751         }
3752         *eof = 1;
3753
3754 done:
3755         read_unlock(&pfkey_table_lock);
3756
3757         *start = buffer + (offset - begin);
3758         len -= (offset - begin);
3759
3760         if (len > length)
3761                 len = length;
3762         if (len < 0)
3763                 len = 0;
3764
3765         return len;
3766 }
3767 #endif
3768
3769 static struct xfrm_mgr pfkeyv2_mgr =
3770 {
3771         .id             = "pfkeyv2",
3772         .notify         = pfkey_send_notify,
3773         .acquire        = pfkey_send_acquire,
3774         .compile_policy = pfkey_compile_policy,
3775         .new_mapping    = pfkey_send_new_mapping,
3776         .notify_policy  = pfkey_send_policy_notify,
3777         .migrate        = pfkey_send_migrate,
3778 };
3779
3780 static void __exit ipsec_pfkey_exit(void)
3781 {
3782         xfrm_unregister_km(&pfkeyv2_mgr);
3783         remove_proc_entry("pfkey", init_net.proc_net);
3784         sock_unregister(PF_KEY);
3785         proto_unregister(&key_proto);
3786 }
3787
3788 static int __init ipsec_pfkey_init(void)
3789 {
3790         int err = proto_register(&key_proto, 0);
3791
3792         if (err != 0)
3793                 goto out;
3794
3795         err = sock_register(&pfkey_family_ops);
3796         if (err != 0)
3797                 goto out_unregister_key_proto;
3798 #ifdef CONFIG_PROC_FS
3799         err = -ENOMEM;
3800         if (create_proc_read_entry("pfkey", 0, init_net.proc_net, pfkey_read_proc, NULL) == NULL)
3801                 goto out_sock_unregister;
3802 #endif
3803         err = xfrm_register_km(&pfkeyv2_mgr);
3804         if (err != 0)
3805                 goto out_remove_proc_entry;
3806 out:
3807         return err;
3808 out_remove_proc_entry:
3809 #ifdef CONFIG_PROC_FS
3810         remove_proc_entry("net/pfkey", NULL);
3811 out_sock_unregister:
3812 #endif
3813         sock_unregister(PF_KEY);
3814 out_unregister_key_proto:
3815         proto_unregister(&key_proto);
3816         goto out;
3817 }
3818
3819 module_init(ipsec_pfkey_init);
3820 module_exit(ipsec_pfkey_exit);
3821 MODULE_LICENSE("GPL");
3822 MODULE_ALIAS_NETPROTO(PF_KEY);