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