SAFE public projects git trees. - safe/jmp/linux-2.6/blob - net/key/af_key.c

   1 /*
   2  * net/key/af_key.c     An implementation of PF_KEYv2 sockets.
   3  *
   4  *              This program is free software; you can redistribute it and/or
   5  *              modify it under the terms of the GNU General Public License
   6  *              as published by the Free Software Foundation; either version
   7  *              2 of the License, or (at your option) any later version.
   8  *
   9  * Authors:     Maxim Giryaev   <gem@asplinux.ru>
  10  *              David S. Miller <davem@redhat.com>
  11  *              Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
  12  *              Kunihiro Ishiguro <kunihiro@ipinfusion.com>
  13  *              Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
  14  *              Derek Atkins <derek@ihtfp.com>
  15  */
  16
  17 #include <linux/capability.h>
  18 #include <linux/module.h>
  19 #include <linux/kernel.h>
  20 #include <linux/socket.h>
  21 #include <linux/pfkeyv2.h>
  22 #include <linux/ipsec.h>
  23 #include <linux/skbuff.h>
  24 #include <linux/rtnetlink.h>
  25 #include <linux/in.h>
  26 #include <linux/in6.h>
  27 #include <linux/proc_fs.h>
  28 #include <linux/init.h>
  29 #include <net/net_namespace.h>
  30 #include <net/xfrm.h>
  31
  32 #include <net/sock.h>
  33
  34 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
  35 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
  36
  37
  38 /* List of all pfkey sockets. */
  39 static HLIST_HEAD(pfkey_table);
  40 static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
  41 static DEFINE_RWLOCK(pfkey_table_lock);
  42 static atomic_t pfkey_table_users = ATOMIC_INIT(0);
  43
  44 static atomic_t pfkey_socks_nr = ATOMIC_INIT(0);
  45
  46 struct pfkey_sock {
  47         /* struct sock must be the first member of struct pfkey_sock */
  48         struct sock     sk;
  49         int             registered;
  50         int             promisc;
  51 };
  52
  53 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
  54 {
  55         return (struct pfkey_sock *)sk;
  56 }
  57
  58 static void pfkey_sock_destruct(struct sock *sk)
  59 {
  60         skb_queue_purge(&sk->sk_receive_queue);
  61
  62         if (!sock_flag(sk, SOCK_DEAD)) {
  63                 printk("Attempt to release alive pfkey socket: %p\n", sk);
  64                 return;
  65         }
  66
  67         BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
  68         BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
  69
  70         atomic_dec(&pfkey_socks_nr);
  71 }
  72
  73 static void pfkey_table_grab(void)
  74 {
  75         write_lock_bh(&pfkey_table_lock);
  76
  77         if (atomic_read(&pfkey_table_users)) {
  78                 DECLARE_WAITQUEUE(wait, current);
  79
  80                 add_wait_queue_exclusive(&pfkey_table_wait, &wait);
  81                 for(;;) {
  82                         set_current_state(TASK_UNINTERRUPTIBLE);
  83                         if (atomic_read(&pfkey_table_users) == 0)
  84                                 break;
  85                         write_unlock_bh(&pfkey_table_lock);
  86                         schedule();
  87                         write_lock_bh(&pfkey_table_lock);
  88                 }
  89
  90                 __set_current_state(TASK_RUNNING);
  91                 remove_wait_queue(&pfkey_table_wait, &wait);
  92         }
  93 }
  94
  95 static __inline__ void pfkey_table_ungrab(void)
  96 {
  97         write_unlock_bh(&pfkey_table_lock);
  98         wake_up(&pfkey_table_wait);
  99 }
 100
 101 static __inline__ void pfkey_lock_table(void)
 102 {
 103         /* read_lock() synchronizes us to pfkey_table_grab */
 104
 105         read_lock(&pfkey_table_lock);
 106         atomic_inc(&pfkey_table_users);
 107         read_unlock(&pfkey_table_lock);
 108 }
 109
 110 static __inline__ void pfkey_unlock_table(void)
 111 {
 112         if (atomic_dec_and_test(&pfkey_table_users))
 113                 wake_up(&pfkey_table_wait);
 114 }
 115
 116
 117 static const struct proto_ops pfkey_ops;
 118
 119 static void pfkey_insert(struct sock *sk)
 120 {
 121         pfkey_table_grab();
 122         sk_add_node(sk, &pfkey_table);
 123         pfkey_table_ungrab();
 124 }
 125
 126 static void pfkey_remove(struct sock *sk)
 127 {
 128         pfkey_table_grab();
 129         sk_del_node_init(sk);
 130         pfkey_table_ungrab();
 131 }
 132
 133 static struct proto key_proto = {
 134         .name     = "KEY",
 135         .owner    = THIS_MODULE,
 136         .obj_size = sizeof(struct pfkey_sock),
 137 };
 138
 139 static int pfkey_create(struct net *net, struct socket *sock, int protocol)
 140 {
 141         struct sock *sk;
 142         int err;
 143
 144         if (net != &init_net)
 145                 return -EAFNOSUPPORT;
 146
 147         if (!capable(CAP_NET_ADMIN))
 148                 return -EPERM;
 149         if (sock->type != SOCK_RAW)
 150                 return -ESOCKTNOSUPPORT;
 151         if (protocol != PF_KEY_V2)
 152                 return -EPROTONOSUPPORT;
 153
 154         err = -ENOMEM;
 155         sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
 156         if (sk == NULL)
 157                 goto out;
 158
 159         sock->ops = &pfkey_ops;
 160         sock_init_data(sock, sk);
 161
 162         sk->sk_family = PF_KEY;
 163         sk->sk_destruct = pfkey_sock_destruct;
 164
 165         atomic_inc(&pfkey_socks_nr);
 166
 167         pfkey_insert(sk);
 168
 169         return 0;
 170 out:
 171         return err;
 172 }
 173
 174 static int pfkey_release(struct socket *sock)
 175 {
 176         struct sock *sk = sock->sk;
 177
 178         if (!sk)
 179                 return 0;
 180
 181         pfkey_remove(sk);
 182
 183         sock_orphan(sk);
 184         sock->sk = NULL;
 185         skb_queue_purge(&sk->sk_write_queue);
 186         sock_put(sk);
 187
 188         return 0;
 189 }
 190
 191 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
 192                                gfp_t allocation, struct sock *sk)
 193 {
 194         int err = -ENOBUFS;
 195
 196         sock_hold(sk);
 197         if (*skb2 == NULL) {
 198                 if (atomic_read(&skb->users) != 1) {
 199                         *skb2 = skb_clone(skb, allocation);
 200                 } else {
 201                         *skb2 = skb;
 202                         atomic_inc(&skb->users);
 203                 }
 204         }
 205         if (*skb2 != NULL) {
 206                 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
 207                         skb_orphan(*skb2);
 208                         skb_set_owner_r(*skb2, sk);
 209                         skb_queue_tail(&sk->sk_receive_queue, *skb2);
 210                         sk->sk_data_ready(sk, (*skb2)->len);
 211                         *skb2 = NULL;
 212                         err = 0;
 213                 }
 214         }
 215         sock_put(sk);
 216         return err;
 217 }
 218
 219 /* Send SKB to all pfkey sockets matching selected criteria.  */
 220 #define BROADCAST_ALL           0
 221 #define BROADCAST_ONE           1
 222 #define BROADCAST_REGISTERED    2
 223 #define BROADCAST_PROMISC_ONLY  4
 224 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
 225                            int broadcast_flags, struct sock *one_sk)
 226 {
 227         struct sock *sk;
 228         struct hlist_node *node;
 229         struct sk_buff *skb2 = NULL;
 230         int err = -ESRCH;
 231
 232         /* XXX Do we need something like netlink_overrun?  I think
 233          * XXX PF_KEY socket apps will not mind current behavior.
 234          */
 235         if (!skb)
 236                 return -ENOMEM;
 237
 238         pfkey_lock_table();
 239         sk_for_each(sk, node, &pfkey_table) {
 240                 struct pfkey_sock *pfk = pfkey_sk(sk);
 241                 int err2;
 242
 243                 /* Yes, it means that if you are meant to receive this
 244                  * pfkey message you receive it twice as promiscuous
 245                  * socket.
 246                  */
 247                 if (pfk->promisc)
 248                         pfkey_broadcast_one(skb, &skb2, allocation, sk);
 249
 250                 /* the exact target will be processed later */
 251                 if (sk == one_sk)
 252                         continue;
 253                 if (broadcast_flags != BROADCAST_ALL) {
 254                         if (broadcast_flags & BROADCAST_PROMISC_ONLY)
 255                                 continue;
 256                         if ((broadcast_flags & BROADCAST_REGISTERED) &&
 257                             !pfk->registered)
 258                                 continue;
 259                         if (broadcast_flags & BROADCAST_ONE)
 260                                 continue;
 261                 }
 262
 263                 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
 264
 265                 /* Error is cleare after succecful sending to at least one
 266                  * registered KM */
 267                 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
 268                         err = err2;
 269         }
 270         pfkey_unlock_table();
 271
 272         if (one_sk != NULL)
 273                 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
 274
 275         if (skb2)
 276                 kfree_skb(skb2);
 277         kfree_skb(skb);
 278         return err;
 279 }
 280
 281 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
 282 {
 283         *new = *orig;
 284 }
 285
 286 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
 287 {
 288         struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
 289         struct sadb_msg *hdr;
 290
 291         if (!skb)
 292                 return -ENOBUFS;
 293
 294         /* Woe be to the platform trying to support PFKEY yet
 295          * having normal errnos outside the 1-255 range, inclusive.
 296          */
 297         err = -err;
 298         if (err == ERESTARTSYS ||
 299             err == ERESTARTNOHAND ||
 300             err == ERESTARTNOINTR)
 301                 err = EINTR;
 302         if (err >= 512)
 303                 err = EINVAL;
 304         BUG_ON(err <= 0 || err >= 256);
 305
 306         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
 307         pfkey_hdr_dup(hdr, orig);
 308         hdr->sadb_msg_errno = (uint8_t) err;
 309         hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
 310                              sizeof(uint64_t));
 311
 312         pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
 313
 314         return 0;
 315 }
 316
 317 static u8 sadb_ext_min_len[] = {
 318         [SADB_EXT_RESERVED]             = (u8) 0,
 319         [SADB_EXT_SA]                   = (u8) sizeof(struct sadb_sa),
 320         [SADB_EXT_LIFETIME_CURRENT]     = (u8) sizeof(struct sadb_lifetime),
 321         [SADB_EXT_LIFETIME_HARD]        = (u8) sizeof(struct sadb_lifetime),
 322         [SADB_EXT_LIFETIME_SOFT]        = (u8) sizeof(struct sadb_lifetime),
 323         [SADB_EXT_ADDRESS_SRC]          = (u8) sizeof(struct sadb_address),
 324         [SADB_EXT_ADDRESS_DST]          = (u8) sizeof(struct sadb_address),
 325         [SADB_EXT_ADDRESS_PROXY]        = (u8) sizeof(struct sadb_address),
 326         [SADB_EXT_KEY_AUTH]             = (u8) sizeof(struct sadb_key),
 327         [SADB_EXT_KEY_ENCRYPT]          = (u8) sizeof(struct sadb_key),
 328         [SADB_EXT_IDENTITY_SRC]         = (u8) sizeof(struct sadb_ident),
 329         [SADB_EXT_IDENTITY_DST]         = (u8) sizeof(struct sadb_ident),
 330         [SADB_EXT_SENSITIVITY]          = (u8) sizeof(struct sadb_sens),
 331         [SADB_EXT_PROPOSAL]             = (u8) sizeof(struct sadb_prop),
 332         [SADB_EXT_SUPPORTED_AUTH]       = (u8) sizeof(struct sadb_supported),
 333         [SADB_EXT_SUPPORTED_ENCRYPT]    = (u8) sizeof(struct sadb_supported),
 334         [SADB_EXT_SPIRANGE]             = (u8) sizeof(struct sadb_spirange),
 335         [SADB_X_EXT_KMPRIVATE]          = (u8) sizeof(struct sadb_x_kmprivate),
 336         [SADB_X_EXT_POLICY]             = (u8) sizeof(struct sadb_x_policy),
 337         [SADB_X_EXT_SA2]                = (u8) sizeof(struct sadb_x_sa2),
 338         [SADB_X_EXT_NAT_T_TYPE]         = (u8) sizeof(struct sadb_x_nat_t_type),
 339         [SADB_X_EXT_NAT_T_SPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
 340         [SADB_X_EXT_NAT_T_DPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
 341         [SADB_X_EXT_NAT_T_OA]           = (u8) sizeof(struct sadb_address),
 342         [SADB_X_EXT_SEC_CTX]            = (u8) sizeof(struct sadb_x_sec_ctx),
 343 };
 344
 345 /* Verify sadb_address_{len,prefixlen} against sa_family.  */
 346 static int verify_address_len(void *p)
 347 {
 348         struct sadb_address *sp = p;
 349         struct sockaddr *addr = (struct sockaddr *)(sp + 1);
 350         struct sockaddr_in *sin;
 351 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 352         struct sockaddr_in6 *sin6;
 353 #endif
 354         int len;
 355
 356         switch (addr->sa_family) {
 357         case AF_INET:
 358                 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
 359                 if (sp->sadb_address_len != len ||
 360                     sp->sadb_address_prefixlen > 32)
 361                         return -EINVAL;
 362                 break;
 363 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 364         case AF_INET6:
 365                 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
 366                 if (sp->sadb_address_len != len ||
 367                     sp->sadb_address_prefixlen > 128)
 368                         return -EINVAL;
 369                 break;
 370 #endif
 371         default:
 372                 /* It is user using kernel to keep track of security
 373                  * associations for another protocol, such as
 374                  * OSPF/RSVP/RIPV2/MIP.  It is user's job to verify
 375                  * lengths.
 376                  *
 377                  * XXX Actually, association/policy database is not yet
 378                  * XXX able to cope with arbitrary sockaddr families.
 379                  * XXX When it can, remove this -EINVAL.  -DaveM
 380                  */
 381                 return -EINVAL;
 382                 break;
 383         }
 384
 385         return 0;
 386 }
 387
 388 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
 389 {
 390         return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
 391                             sec_ctx->sadb_x_ctx_len,
 392                             sizeof(uint64_t));
 393 }
 394
 395 static inline int verify_sec_ctx_len(void *p)
 396 {
 397         struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
 398         int len = sec_ctx->sadb_x_ctx_len;
 399
 400         if (len > PAGE_SIZE)
 401                 return -EINVAL;
 402
 403         len = pfkey_sec_ctx_len(sec_ctx);
 404
 405         if (sec_ctx->sadb_x_sec_len != len)
 406                 return -EINVAL;
 407
 408         return 0;
 409 }
 410
 411 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
 412 {
 413         struct xfrm_user_sec_ctx *uctx = NULL;
 414         int ctx_size = sec_ctx->sadb_x_ctx_len;
 415
 416         uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
 417
 418         if (!uctx)
 419                 return NULL;
 420
 421         uctx->len = pfkey_sec_ctx_len(sec_ctx);
 422         uctx->exttype = sec_ctx->sadb_x_sec_exttype;
 423         uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
 424         uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
 425         uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
 426         memcpy(uctx + 1, sec_ctx + 1,
 427                uctx->ctx_len);
 428
 429         return uctx;
 430 }
 431
 432 static int present_and_same_family(struct sadb_address *src,
 433                                    struct sadb_address *dst)
 434 {
 435         struct sockaddr *s_addr, *d_addr;
 436
 437         if (!src || !dst)
 438                 return 0;
 439
 440         s_addr = (struct sockaddr *)(src + 1);
 441         d_addr = (struct sockaddr *)(dst + 1);
 442         if (s_addr->sa_family != d_addr->sa_family)
 443                 return 0;
 444         if (s_addr->sa_family != AF_INET
 445 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 446             && s_addr->sa_family != AF_INET6
 447 #endif
 448                 )
 449                 return 0;
 450
 451         return 1;
 452 }
 453
 454 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
 455 {
 456         char *p = (char *) hdr;
 457         int len = skb->len;
 458
 459         len -= sizeof(*hdr);
 460         p += sizeof(*hdr);
 461         while (len > 0) {
 462                 struct sadb_ext *ehdr = (struct sadb_ext *) p;
 463                 uint16_t ext_type;
 464                 int ext_len;
 465
 466                 ext_len  = ehdr->sadb_ext_len;
 467                 ext_len *= sizeof(uint64_t);
 468                 ext_type = ehdr->sadb_ext_type;
 469                 if (ext_len < sizeof(uint64_t) ||
 470                     ext_len > len ||
 471                     ext_type == SADB_EXT_RESERVED)
 472                         return -EINVAL;
 473
 474                 if (ext_type <= SADB_EXT_MAX) {
 475                         int min = (int) sadb_ext_min_len[ext_type];
 476                         if (ext_len < min)
 477                                 return -EINVAL;
 478                         if (ext_hdrs[ext_type-1] != NULL)
 479                                 return -EINVAL;
 480                         if (ext_type == SADB_EXT_ADDRESS_SRC ||
 481                             ext_type == SADB_EXT_ADDRESS_DST ||
 482                             ext_type == SADB_EXT_ADDRESS_PROXY ||
 483                             ext_type == SADB_X_EXT_NAT_T_OA) {
 484                                 if (verify_address_len(p))
 485                                         return -EINVAL;
 486                         }
 487                         if (ext_type == SADB_X_EXT_SEC_CTX) {
 488                                 if (verify_sec_ctx_len(p))
 489                                         return -EINVAL;
 490                         }
 491                         ext_hdrs[ext_type-1] = p;
 492                 }
 493                 p   += ext_len;
 494                 len -= ext_len;
 495         }
 496
 497         return 0;
 498 }
 499
 500 static uint16_t
 501 pfkey_satype2proto(uint8_t satype)
 502 {
 503         switch (satype) {
 504         case SADB_SATYPE_UNSPEC:
 505                 return IPSEC_PROTO_ANY;
 506         case SADB_SATYPE_AH:
 507                 return IPPROTO_AH;
 508         case SADB_SATYPE_ESP:
 509                 return IPPROTO_ESP;
 510         case SADB_X_SATYPE_IPCOMP:
 511                 return IPPROTO_COMP;
 512                 break;
 513         default:
 514                 return 0;
 515         }
 516         /* NOTREACHED */
 517 }
 518
 519 static uint8_t
 520 pfkey_proto2satype(uint16_t proto)
 521 {
 522         switch (proto) {
 523         case IPPROTO_AH:
 524                 return SADB_SATYPE_AH;
 525         case IPPROTO_ESP:
 526                 return SADB_SATYPE_ESP;
 527         case IPPROTO_COMP:
 528                 return SADB_X_SATYPE_IPCOMP;
 529                 break;
 530         default:
 531                 return 0;
 532         }
 533         /* NOTREACHED */
 534 }
 535
 536 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
 537  * say specifically 'just raw sockets' as we encode them as 255.
 538  */
 539
 540 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
 541 {
 542         return (proto == IPSEC_PROTO_ANY ? 0 : proto);
 543 }
 544
 545 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
 546 {
 547         return (proto ? proto : IPSEC_PROTO_ANY);
 548 }
 549
 550 static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
 551                                      xfrm_address_t *xaddr)
 552 {
 553         switch (((struct sockaddr*)(addr + 1))->sa_family) {
 554         case AF_INET:
 555                 xaddr->a4 =
 556                         ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
 557                 return AF_INET;
 558 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 559         case AF_INET6:
 560                 memcpy(xaddr->a6,
 561                        &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
 562                        sizeof(struct in6_addr));
 563                 return AF_INET6;
 564 #endif
 565         default:
 566                 return 0;
 567         }
 568         /* NOTREACHED */
 569 }
 570
 571 static struct  xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
 572 {
 573         struct sadb_sa *sa;
 574         struct sadb_address *addr;
 575         uint16_t proto;
 576         unsigned short family;
 577         xfrm_address_t *xaddr;
 578
 579         sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
 580         if (sa == NULL)
 581                 return NULL;
 582
 583         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
 584         if (proto == 0)
 585                 return NULL;
 586
 587         /* sadb_address_len should be checked by caller */
 588         addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
 589         if (addr == NULL)
 590                 return NULL;
 591
 592         family = ((struct sockaddr *)(addr + 1))->sa_family;
 593         switch (family) {
 594         case AF_INET:
 595                 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
 596                 break;
 597 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 598         case AF_INET6:
 599                 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
 600                 break;
 601 #endif
 602         default:
 603                 xaddr = NULL;
 604         }
 605
 606         if (!xaddr)
 607                 return NULL;
 608
 609         return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
 610 }
 611
 612 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
 613 static int
 614 pfkey_sockaddr_size(sa_family_t family)
 615 {
 616         switch (family) {
 617         case AF_INET:
 618                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
 619 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 620         case AF_INET6:
 621                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
 622 #endif
 623         default:
 624                 return 0;
 625         }
 626         /* NOTREACHED */
 627 }
 628
 629 static inline int pfkey_mode_from_xfrm(int mode)
 630 {
 631         switch(mode) {
 632         case XFRM_MODE_TRANSPORT:
 633                 return IPSEC_MODE_TRANSPORT;
 634         case XFRM_MODE_TUNNEL:
 635                 return IPSEC_MODE_TUNNEL;
 636         case XFRM_MODE_BEET:
 637                 return IPSEC_MODE_BEET;
 638         default:
 639                 return -1;
 640         }
 641 }
 642
 643 static inline int pfkey_mode_to_xfrm(int mode)
 644 {
 645         switch(mode) {
 646         case IPSEC_MODE_ANY:    /*XXX*/
 647         case IPSEC_MODE_TRANSPORT:
 648                 return XFRM_MODE_TRANSPORT;
 649         case IPSEC_MODE_TUNNEL:
 650                 return XFRM_MODE_TUNNEL;
 651         case IPSEC_MODE_BEET:
 652                 return XFRM_MODE_BEET;
 653         default:
 654                 return -1;
 655         }
 656 }
 657
 658 static struct sk_buff *__pfkey_xfrm_state2msg(struct xfrm_state *x,
 659                                               int add_keys, int hsc)
 660 {
 661         struct sk_buff *skb;
 662         struct sadb_msg *hdr;
 663         struct sadb_sa *sa;
 664         struct sadb_lifetime *lifetime;
 665         struct sadb_address *addr;
 666         struct sadb_key *key;
 667         struct sadb_x_sa2 *sa2;
 668         struct sockaddr_in *sin;
 669         struct sadb_x_sec_ctx *sec_ctx;
 670         struct xfrm_sec_ctx *xfrm_ctx;
 671         int ctx_size = 0;
 672 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 673         struct sockaddr_in6 *sin6;
 674 #endif
 675         int size;
 676         int auth_key_size = 0;
 677         int encrypt_key_size = 0;
 678         int sockaddr_size;
 679         struct xfrm_encap_tmpl *natt = NULL;
 680         int mode;
 681
 682         /* address family check */
 683         sockaddr_size = pfkey_sockaddr_size(x->props.family);
 684         if (!sockaddr_size)
 685                 return ERR_PTR(-EINVAL);
 686
 687         /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
 688            key(AE), (identity(SD),) (sensitivity)> */
 689         size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
 690                 sizeof(struct sadb_lifetime) +
 691                 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
 692                 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
 693                         sizeof(struct sadb_address)*2 +
 694                                 sockaddr_size*2 +
 695                                         sizeof(struct sadb_x_sa2);
 696
 697         if ((xfrm_ctx = x->security)) {
 698                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
 699                 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
 700         }
 701
 702         /* identity & sensitivity */
 703
 704         if ((x->props.family == AF_INET &&
 705              x->sel.saddr.a4 != x->props.saddr.a4)
 706 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 707             || (x->props.family == AF_INET6 &&
 708                 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
 709 #endif
 710                 )
 711                 size += sizeof(struct sadb_address) + sockaddr_size;
 712
 713         if (add_keys) {
 714                 if (x->aalg && x->aalg->alg_key_len) {
 715                         auth_key_size =
 716                                 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
 717                         size += sizeof(struct sadb_key) + auth_key_size;
 718                 }
 719                 if (x->ealg && x->ealg->alg_key_len) {
 720                         encrypt_key_size =
 721                                 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
 722                         size += sizeof(struct sadb_key) + encrypt_key_size;
 723                 }
 724         }
 725         if (x->encap)
 726                 natt = x->encap;
 727
 728         if (natt && natt->encap_type) {
 729                 size += sizeof(struct sadb_x_nat_t_type);
 730                 size += sizeof(struct sadb_x_nat_t_port);
 731                 size += sizeof(struct sadb_x_nat_t_port);
 732         }
 733
 734         skb =  alloc_skb(size + 16, GFP_ATOMIC);
 735         if (skb == NULL)
 736                 return ERR_PTR(-ENOBUFS);
 737
 738         /* call should fill header later */
 739         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
 740         memset(hdr, 0, size);   /* XXX do we need this ? */
 741         hdr->sadb_msg_len = size / sizeof(uint64_t);
 742
 743         /* sa */
 744         sa = (struct sadb_sa *)  skb_put(skb, sizeof(struct sadb_sa));
 745         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
 746         sa->sadb_sa_exttype = SADB_EXT_SA;
 747         sa->sadb_sa_spi = x->id.spi;
 748         sa->sadb_sa_replay = x->props.replay_window;
 749         switch (x->km.state) {
 750         case XFRM_STATE_VALID:
 751                 sa->sadb_sa_state = x->km.dying ?
 752                         SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
 753                 break;
 754         case XFRM_STATE_ACQ:
 755                 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
 756                 break;
 757         default:
 758                 sa->sadb_sa_state = SADB_SASTATE_DEAD;
 759                 break;
 760         }
 761         sa->sadb_sa_auth = 0;
 762         if (x->aalg) {
 763                 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
 764                 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
 765         }
 766         sa->sadb_sa_encrypt = 0;
 767         BUG_ON(x->ealg && x->calg);
 768         if (x->ealg) {
 769                 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
 770                 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
 771         }
 772         /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
 773         if (x->calg) {
 774                 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
 775                 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
 776         }
 777
 778         sa->sadb_sa_flags = 0;
 779         if (x->props.flags & XFRM_STATE_NOECN)
 780                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
 781         if (x->props.flags & XFRM_STATE_DECAP_DSCP)
 782                 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
 783         if (x->props.flags & XFRM_STATE_NOPMTUDISC)
 784                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
 785
 786         /* hard time */
 787         if (hsc & 2) {
 788                 lifetime = (struct sadb_lifetime *)  skb_put(skb,
 789                                                              sizeof(struct sadb_lifetime));
 790                 lifetime->sadb_lifetime_len =
 791                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 792                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
 793                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.hard_packet_limit);
 794                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
 795                 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
 796                 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
 797         }
 798         /* soft time */
 799         if (hsc & 1) {
 800                 lifetime = (struct sadb_lifetime *)  skb_put(skb,
 801                                                              sizeof(struct sadb_lifetime));
 802                 lifetime->sadb_lifetime_len =
 803                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 804                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
 805                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.soft_packet_limit);
 806                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
 807                 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
 808                 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
 809         }
 810         /* current time */
 811         lifetime = (struct sadb_lifetime *)  skb_put(skb,
 812                                                      sizeof(struct sadb_lifetime));
 813         lifetime->sadb_lifetime_len =
 814                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 815         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
 816         lifetime->sadb_lifetime_allocations = x->curlft.packets;
 817         lifetime->sadb_lifetime_bytes = x->curlft.bytes;
 818         lifetime->sadb_lifetime_addtime = x->curlft.add_time;
 819         lifetime->sadb_lifetime_usetime = x->curlft.use_time;
 820         /* src address */
 821         addr = (struct sadb_address*) skb_put(skb,
 822                                               sizeof(struct sadb_address)+sockaddr_size);
 823         addr->sadb_address_len =
 824                 (sizeof(struct sadb_address)+sockaddr_size)/
 825                         sizeof(uint64_t);
 826         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
 827         /* "if the ports are non-zero, then the sadb_address_proto field,
 828            normally zero, MUST be filled in with the transport
 829            protocol's number." - RFC2367 */
 830         addr->sadb_address_proto = 0;
 831         addr->sadb_address_reserved = 0;
 832         if (x->props.family == AF_INET) {
 833                 addr->sadb_address_prefixlen = 32;
 834
 835                 sin = (struct sockaddr_in *) (addr + 1);
 836                 sin->sin_family = AF_INET;
 837                 sin->sin_addr.s_addr = x->props.saddr.a4;
 838                 sin->sin_port = 0;
 839                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
 840         }
 841 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 842         else if (x->props.family == AF_INET6) {
 843                 addr->sadb_address_prefixlen = 128;
 844
 845                 sin6 = (struct sockaddr_in6 *) (addr + 1);
 846                 sin6->sin6_family = AF_INET6;
 847                 sin6->sin6_port = 0;
 848                 sin6->sin6_flowinfo = 0;
 849                 memcpy(&sin6->sin6_addr, x->props.saddr.a6,
 850                        sizeof(struct in6_addr));
 851                 sin6->sin6_scope_id = 0;
 852         }
 853 #endif
 854         else
 855                 BUG();
 856
 857         /* dst address */
 858         addr = (struct sadb_address*) skb_put(skb,
 859                                               sizeof(struct sadb_address)+sockaddr_size);
 860         addr->sadb_address_len =
 861                 (sizeof(struct sadb_address)+sockaddr_size)/
 862                         sizeof(uint64_t);
 863         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
 864         addr->sadb_address_proto = 0;
 865         addr->sadb_address_prefixlen = 32; /* XXX */
 866         addr->sadb_address_reserved = 0;
 867         if (x->props.family == AF_INET) {
 868                 sin = (struct sockaddr_in *) (addr + 1);
 869                 sin->sin_family = AF_INET;
 870                 sin->sin_addr.s_addr = x->id.daddr.a4;
 871                 sin->sin_port = 0;
 872                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
 873
 874                 if (x->sel.saddr.a4 != x->props.saddr.a4) {
 875                         addr = (struct sadb_address*) skb_put(skb,
 876                                 sizeof(struct sadb_address)+sockaddr_size);
 877                         addr->sadb_address_len =
 878                                 (sizeof(struct sadb_address)+sockaddr_size)/
 879                                 sizeof(uint64_t);
 880                         addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
 881                         addr->sadb_address_proto =
 882                                 pfkey_proto_from_xfrm(x->sel.proto);
 883                         addr->sadb_address_prefixlen = x->sel.prefixlen_s;
 884                         addr->sadb_address_reserved = 0;
 885
 886                         sin = (struct sockaddr_in *) (addr + 1);
 887                         sin->sin_family = AF_INET;
 888                         sin->sin_addr.s_addr = x->sel.saddr.a4;
 889                         sin->sin_port = x->sel.sport;
 890                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
 891                 }
 892         }
 893 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 894         else if (x->props.family == AF_INET6) {
 895                 addr->sadb_address_prefixlen = 128;
 896
 897                 sin6 = (struct sockaddr_in6 *) (addr + 1);
 898                 sin6->sin6_family = AF_INET6;
 899                 sin6->sin6_port = 0;
 900                 sin6->sin6_flowinfo = 0;
 901                 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
 902                 sin6->sin6_scope_id = 0;
 903
 904                 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
 905                             sizeof(struct in6_addr))) {
 906                         addr = (struct sadb_address *) skb_put(skb,
 907                                 sizeof(struct sadb_address)+sockaddr_size);
 908                         addr->sadb_address_len =
 909                                 (sizeof(struct sadb_address)+sockaddr_size)/
 910                                 sizeof(uint64_t);
 911                         addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
 912                         addr->sadb_address_proto =
 913                                 pfkey_proto_from_xfrm(x->sel.proto);
 914                         addr->sadb_address_prefixlen = x->sel.prefixlen_s;
 915                         addr->sadb_address_reserved = 0;
 916
 917                         sin6 = (struct sockaddr_in6 *) (addr + 1);
 918                         sin6->sin6_family = AF_INET6;
 919                         sin6->sin6_port = x->sel.sport;
 920                         sin6->sin6_flowinfo = 0;
 921                         memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
 922                                sizeof(struct in6_addr));
 923                         sin6->sin6_scope_id = 0;
 924                 }
 925         }
 926 #endif
 927         else
 928                 BUG();
 929
 930         /* auth key */
 931         if (add_keys && auth_key_size) {
 932                 key = (struct sadb_key *) skb_put(skb,
 933                                                   sizeof(struct sadb_key)+auth_key_size);
 934                 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
 935                         sizeof(uint64_t);
 936                 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
 937                 key->sadb_key_bits = x->aalg->alg_key_len;
 938                 key->sadb_key_reserved = 0;
 939                 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
 940         }
 941         /* encrypt key */
 942         if (add_keys && encrypt_key_size) {
 943                 key = (struct sadb_key *) skb_put(skb,
 944                                                   sizeof(struct sadb_key)+encrypt_key_size);
 945                 key->sadb_key_len = (sizeof(struct sadb_key) +
 946                                      encrypt_key_size) / sizeof(uint64_t);
 947                 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
 948                 key->sadb_key_bits = x->ealg->alg_key_len;
 949                 key->sadb_key_reserved = 0;
 950                 memcpy(key + 1, x->ealg->alg_key,
 951                        (x->ealg->alg_key_len+7)/8);
 952         }
 953
 954         /* sa */
 955         sa2 = (struct sadb_x_sa2 *)  skb_put(skb, sizeof(struct sadb_x_sa2));
 956         sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
 957         sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
 958         if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
 959                 kfree_skb(skb);
 960                 return ERR_PTR(-EINVAL);
 961         }
 962         sa2->sadb_x_sa2_mode = mode;
 963         sa2->sadb_x_sa2_reserved1 = 0;
 964         sa2->sadb_x_sa2_reserved2 = 0;
 965         sa2->sadb_x_sa2_sequence = 0;
 966         sa2->sadb_x_sa2_reqid = x->props.reqid;
 967
 968         if (natt && natt->encap_type) {
 969                 struct sadb_x_nat_t_type *n_type;
 970                 struct sadb_x_nat_t_port *n_port;
 971
 972                 /* type */
 973                 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
 974                 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
 975                 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
 976                 n_type->sadb_x_nat_t_type_type = natt->encap_type;
 977                 n_type->sadb_x_nat_t_type_reserved[0] = 0;
 978                 n_type->sadb_x_nat_t_type_reserved[1] = 0;
 979                 n_type->sadb_x_nat_t_type_reserved[2] = 0;
 980
 981                 /* source port */
 982                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
 983                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
 984                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
 985                 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
 986                 n_port->sadb_x_nat_t_port_reserved = 0;
 987
 988                 /* dest port */
 989                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
 990                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
 991                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
 992                 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
 993                 n_port->sadb_x_nat_t_port_reserved = 0;
 994         }
 995
 996         /* security context */
 997         if (xfrm_ctx) {
 998                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
 999                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1000                 sec_ctx->sadb_x_sec_len =
1001                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1002                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1003                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1004                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1005                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1006                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1007                        xfrm_ctx->ctx_len);
1008         }
1009
1010         return skb;
1011 }
1012
1013
1014 static inline struct sk_buff *pfkey_xfrm_state2msg(struct xfrm_state *x)
1015 {
1016         struct sk_buff *skb;
1017
1018         skb = __pfkey_xfrm_state2msg(x, 1, 3);
1019
1020         return skb;
1021 }
1022
1023 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x,
1024                                                           int hsc)
1025 {
1026         return __pfkey_xfrm_state2msg(x, 0, hsc);
1027 }
1028
1029 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1030                                                 void **ext_hdrs)
1031 {
1032         struct xfrm_state *x;
1033         struct sadb_lifetime *lifetime;
1034         struct sadb_sa *sa;
1035         struct sadb_key *key;
1036         struct sadb_x_sec_ctx *sec_ctx;
1037         uint16_t proto;
1038         int err;
1039
1040
1041         sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1042         if (!sa ||
1043             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1044                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1045                 return ERR_PTR(-EINVAL);
1046         if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1047             !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1048                 return ERR_PTR(-EINVAL);
1049         if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1050             !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1051                 return ERR_PTR(-EINVAL);
1052         if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1053             !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1054                 return ERR_PTR(-EINVAL);
1055
1056         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1057         if (proto == 0)
1058                 return ERR_PTR(-EINVAL);
1059
1060         /* default error is no buffer space */
1061         err = -ENOBUFS;
1062
1063         /* RFC2367:
1064
1065    Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1066    SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1067    sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1068    Therefore, the sadb_sa_state field of all submitted SAs MUST be
1069    SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1070    not true.
1071
1072            However, KAME setkey always uses SADB_SASTATE_LARVAL.
1073            Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1074          */
1075         if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1076             (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1077              sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1078             sa->sadb_sa_encrypt > SADB_EALG_MAX)
1079                 return ERR_PTR(-EINVAL);
1080         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1081         if (key != NULL &&
1082             sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1083             ((key->sadb_key_bits+7) / 8 == 0 ||
1084              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1085                 return ERR_PTR(-EINVAL);
1086         key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1087         if (key != NULL &&
1088             sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1089             ((key->sadb_key_bits+7) / 8 == 0 ||
1090              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1091                 return ERR_PTR(-EINVAL);
1092
1093         x = xfrm_state_alloc();
1094         if (x == NULL)
1095                 return ERR_PTR(-ENOBUFS);
1096
1097         x->id.proto = proto;
1098         x->id.spi = sa->sadb_sa_spi;
1099         x->props.replay_window = sa->sadb_sa_replay;
1100         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1101                 x->props.flags |= XFRM_STATE_NOECN;
1102         if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1103                 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1104         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1105                 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1106
1107         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1108         if (lifetime != NULL) {
1109                 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1110                 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1111                 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1112                 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1113         }
1114         lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1115         if (lifetime != NULL) {
1116                 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1117                 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1118                 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1119                 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1120         }
1121
1122         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1123         if (sec_ctx != NULL) {
1124                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1125
1126                 if (!uctx)
1127                         goto out;
1128
1129                 err = security_xfrm_state_alloc(x, uctx);
1130                 kfree(uctx);
1131
1132                 if (err)
1133                         goto out;
1134         }
1135
1136         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1137         if (sa->sadb_sa_auth) {
1138                 int keysize = 0;
1139                 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1140                 if (!a) {
1141                         err = -ENOSYS;
1142                         goto out;
1143                 }
1144                 if (key)
1145                         keysize = (key->sadb_key_bits + 7) / 8;
1146                 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1147                 if (!x->aalg)
1148                         goto out;
1149                 strcpy(x->aalg->alg_name, a->name);
1150                 x->aalg->alg_key_len = 0;
1151                 if (key) {
1152                         x->aalg->alg_key_len = key->sadb_key_bits;
1153                         memcpy(x->aalg->alg_key, key+1, keysize);
1154                 }
1155                 x->props.aalgo = sa->sadb_sa_auth;
1156                 /* x->algo.flags = sa->sadb_sa_flags; */
1157         }
1158         if (sa->sadb_sa_encrypt) {
1159                 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1160                         struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1161                         if (!a) {
1162                                 err = -ENOSYS;
1163                                 goto out;
1164                         }
1165                         x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1166                         if (!x->calg)
1167                                 goto out;
1168                         strcpy(x->calg->alg_name, a->name);
1169                         x->props.calgo = sa->sadb_sa_encrypt;
1170                 } else {
1171                         int keysize = 0;
1172                         struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1173                         if (!a) {
1174                                 err = -ENOSYS;
1175                                 goto out;
1176                         }
1177                         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1178                         if (key)
1179                                 keysize = (key->sadb_key_bits + 7) / 8;
1180                         x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1181                         if (!x->ealg)
1182                                 goto out;
1183                         strcpy(x->ealg->alg_name, a->name);
1184                         x->ealg->alg_key_len = 0;
1185                         if (key) {
1186                                 x->ealg->alg_key_len = key->sadb_key_bits;
1187                                 memcpy(x->ealg->alg_key, key+1, keysize);
1188                         }
1189                         x->props.ealgo = sa->sadb_sa_encrypt;
1190                 }
1191         }
1192         /* x->algo.flags = sa->sadb_sa_flags; */
1193
1194         x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1195                                                     &x->props.saddr);
1196         if (!x->props.family) {
1197                 err = -EAFNOSUPPORT;
1198                 goto out;
1199         }
1200         pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1201                                   &x->id.daddr);
1202
1203         if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1204                 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1205                 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1206                 if (mode < 0) {
1207                         err = -EINVAL;
1208                         goto out;
1209                 }
1210                 x->props.mode = mode;
1211                 x->props.reqid = sa2->sadb_x_sa2_reqid;
1212         }
1213
1214         if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1215                 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1216
1217                 /* Nobody uses this, but we try. */
1218                 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1219                 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1220         }
1221
1222         if (!x->sel.family)
1223                 x->sel.family = x->props.family;
1224
1225         if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1226                 struct sadb_x_nat_t_type* n_type;
1227                 struct xfrm_encap_tmpl *natt;
1228
1229                 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1230                 if (!x->encap)
1231                         goto out;
1232
1233                 natt = x->encap;
1234                 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1235                 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1236
1237                 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1238                         struct sadb_x_nat_t_port* n_port =
1239                                 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1240                         natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1241                 }
1242                 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1243                         struct sadb_x_nat_t_port* n_port =
1244                                 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1245                         natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1246                 }
1247         }
1248
1249         err = xfrm_init_state(x);
1250         if (err)
1251                 goto out;
1252
1253         x->km.seq = hdr->sadb_msg_seq;
1254         return x;
1255
1256 out:
1257         x->km.state = XFRM_STATE_DEAD;
1258         xfrm_state_put(x);
1259         return ERR_PTR(err);
1260 }
1261
1262 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1263 {
1264         return -EOPNOTSUPP;
1265 }
1266
1267 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1268 {
1269         struct sk_buff *resp_skb;
1270         struct sadb_x_sa2 *sa2;
1271         struct sadb_address *saddr, *daddr;
1272         struct sadb_msg *out_hdr;
1273         struct sadb_spirange *range;
1274         struct xfrm_state *x = NULL;
1275         int mode;
1276         int err;
1277         u32 min_spi, max_spi;
1278         u32 reqid;
1279         u8 proto;
1280         unsigned short family;
1281         xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1282
1283         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1284                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1285                 return -EINVAL;
1286
1287         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1288         if (proto == 0)
1289                 return -EINVAL;
1290
1291         if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1292                 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1293                 if (mode < 0)
1294                         return -EINVAL;
1295                 reqid = sa2->sadb_x_sa2_reqid;
1296         } else {
1297                 mode = 0;
1298                 reqid = 0;
1299         }
1300
1301         saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1302         daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1303
1304         family = ((struct sockaddr *)(saddr + 1))->sa_family;
1305         switch (family) {
1306         case AF_INET:
1307                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1308                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1309                 break;
1310 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1311         case AF_INET6:
1312                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1313                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1314                 break;
1315 #endif
1316         }
1317
1318         if (hdr->sadb_msg_seq) {
1319                 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1320                 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1321                         xfrm_state_put(x);
1322                         x = NULL;
1323                 }
1324         }
1325
1326         if (!x)
1327                 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1328
1329         if (x == NULL)
1330                 return -ENOENT;
1331
1332         min_spi = 0x100;
1333         max_spi = 0x0fffffff;
1334
1335         range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1336         if (range) {
1337                 min_spi = range->sadb_spirange_min;
1338                 max_spi = range->sadb_spirange_max;
1339         }
1340
1341         err = xfrm_alloc_spi(x, min_spi, max_spi);
1342         resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1343
1344         if (IS_ERR(resp_skb)) {
1345                 xfrm_state_put(x);
1346                 return  PTR_ERR(resp_skb);
1347         }
1348
1349         out_hdr = (struct sadb_msg *) resp_skb->data;
1350         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1351         out_hdr->sadb_msg_type = SADB_GETSPI;
1352         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1353         out_hdr->sadb_msg_errno = 0;
1354         out_hdr->sadb_msg_reserved = 0;
1355         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1356         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1357
1358         xfrm_state_put(x);
1359
1360         pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1361
1362         return 0;
1363 }
1364
1365 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1366 {
1367         struct xfrm_state *x;
1368
1369         if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1370                 return -EOPNOTSUPP;
1371
1372         if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1373                 return 0;
1374
1375         x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1376         if (x == NULL)
1377                 return 0;
1378
1379         spin_lock_bh(&x->lock);
1380         if (x->km.state == XFRM_STATE_ACQ) {
1381                 x->km.state = XFRM_STATE_ERROR;
1382                 wake_up(&km_waitq);
1383         }
1384         spin_unlock_bh(&x->lock);
1385         xfrm_state_put(x);
1386         return 0;
1387 }
1388
1389 static inline int event2poltype(int event)
1390 {
1391         switch (event) {
1392         case XFRM_MSG_DELPOLICY:
1393                 return SADB_X_SPDDELETE;
1394         case XFRM_MSG_NEWPOLICY:
1395                 return SADB_X_SPDADD;
1396         case XFRM_MSG_UPDPOLICY:
1397                 return SADB_X_SPDUPDATE;
1398         case XFRM_MSG_POLEXPIRE:
1399         //      return SADB_X_SPDEXPIRE;
1400         default:
1401                 printk("pfkey: Unknown policy event %d\n", event);
1402                 break;
1403         }
1404
1405         return 0;
1406 }
1407
1408 static inline int event2keytype(int event)
1409 {
1410         switch (event) {
1411         case XFRM_MSG_DELSA:
1412                 return SADB_DELETE;
1413         case XFRM_MSG_NEWSA:
1414                 return SADB_ADD;
1415         case XFRM_MSG_UPDSA:
1416                 return SADB_UPDATE;
1417         case XFRM_MSG_EXPIRE:
1418                 return SADB_EXPIRE;
1419         default:
1420                 printk("pfkey: Unknown SA event %d\n", event);
1421                 break;
1422         }
1423
1424         return 0;
1425 }
1426
1427 /* ADD/UPD/DEL */
1428 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1429 {
1430         struct sk_buff *skb;
1431         struct sadb_msg *hdr;
1432
1433         skb = pfkey_xfrm_state2msg(x);
1434
1435         if (IS_ERR(skb))
1436                 return PTR_ERR(skb);
1437
1438         hdr = (struct sadb_msg *) skb->data;
1439         hdr->sadb_msg_version = PF_KEY_V2;
1440         hdr->sadb_msg_type = event2keytype(c->event);
1441         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1442         hdr->sadb_msg_errno = 0;
1443         hdr->sadb_msg_reserved = 0;
1444         hdr->sadb_msg_seq = c->seq;
1445         hdr->sadb_msg_pid = c->pid;
1446
1447         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1448
1449         return 0;
1450 }
1451
1452 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1453 {
1454         struct xfrm_state *x;
1455         int err;
1456         struct km_event c;
1457
1458         x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1459         if (IS_ERR(x))
1460                 return PTR_ERR(x);
1461
1462         xfrm_state_hold(x);
1463         if (hdr->sadb_msg_type == SADB_ADD)
1464                 err = xfrm_state_add(x);
1465         else
1466                 err = xfrm_state_update(x);
1467
1468         xfrm_audit_state_add(x, err ? 0 : 1,
1469                              audit_get_loginuid(current), 0);
1470
1471         if (err < 0) {
1472                 x->km.state = XFRM_STATE_DEAD;
1473                 __xfrm_state_put(x);
1474                 goto out;
1475         }
1476
1477         if (hdr->sadb_msg_type == SADB_ADD)
1478                 c.event = XFRM_MSG_NEWSA;
1479         else
1480                 c.event = XFRM_MSG_UPDSA;
1481         c.seq = hdr->sadb_msg_seq;
1482         c.pid = hdr->sadb_msg_pid;
1483         km_state_notify(x, &c);
1484 out:
1485         xfrm_state_put(x);
1486         return err;
1487 }
1488
1489 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1490 {
1491         struct xfrm_state *x;
1492         struct km_event c;
1493         int err;
1494
1495         if (!ext_hdrs[SADB_EXT_SA-1] ||
1496             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1497                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1498                 return -EINVAL;
1499
1500         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1501         if (x == NULL)
1502                 return -ESRCH;
1503
1504         if ((err = security_xfrm_state_delete(x)))
1505                 goto out;
1506
1507         if (xfrm_state_kern(x)) {
1508                 err = -EPERM;
1509                 goto out;
1510         }
1511
1512         err = xfrm_state_delete(x);
1513
1514         if (err < 0)
1515                 goto out;
1516
1517         c.seq = hdr->sadb_msg_seq;
1518         c.pid = hdr->sadb_msg_pid;
1519         c.event = XFRM_MSG_DELSA;
1520         km_state_notify(x, &c);
1521 out:
1522         xfrm_audit_state_delete(x, err ? 0 : 1,
1523                                audit_get_loginuid(current), 0);
1524         xfrm_state_put(x);
1525
1526         return err;
1527 }
1528
1529 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1530 {
1531         __u8 proto;
1532         struct sk_buff *out_skb;
1533         struct sadb_msg *out_hdr;
1534         struct xfrm_state *x;
1535
1536         if (!ext_hdrs[SADB_EXT_SA-1] ||
1537             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1538                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1539                 return -EINVAL;
1540
1541         x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1542         if (x == NULL)
1543                 return -ESRCH;
1544
1545         out_skb = pfkey_xfrm_state2msg(x);
1546         proto = x->id.proto;
1547         xfrm_state_put(x);
1548         if (IS_ERR(out_skb))
1549                 return  PTR_ERR(out_skb);
1550
1551         out_hdr = (struct sadb_msg *) out_skb->data;
1552         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1553         out_hdr->sadb_msg_type = SADB_GET;
1554         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1555         out_hdr->sadb_msg_errno = 0;
1556         out_hdr->sadb_msg_reserved = 0;
1557         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1558         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1559         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1560
1561         return 0;
1562 }
1563
1564 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1565                                               gfp_t allocation)
1566 {
1567         struct sk_buff *skb;
1568         struct sadb_msg *hdr;
1569         int len, auth_len, enc_len, i;
1570
1571         auth_len = xfrm_count_auth_supported();
1572         if (auth_len) {
1573                 auth_len *= sizeof(struct sadb_alg);
1574                 auth_len += sizeof(struct sadb_supported);
1575         }
1576
1577         enc_len = xfrm_count_enc_supported();
1578         if (enc_len) {
1579                 enc_len *= sizeof(struct sadb_alg);
1580                 enc_len += sizeof(struct sadb_supported);
1581         }
1582
1583         len = enc_len + auth_len + sizeof(struct sadb_msg);
1584
1585         skb = alloc_skb(len + 16, allocation);
1586         if (!skb)
1587                 goto out_put_algs;
1588
1589         hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1590         pfkey_hdr_dup(hdr, orig);
1591         hdr->sadb_msg_errno = 0;
1592         hdr->sadb_msg_len = len / sizeof(uint64_t);
1593
1594         if (auth_len) {
1595                 struct sadb_supported *sp;
1596                 struct sadb_alg *ap;
1597
1598                 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1599                 ap = (struct sadb_alg *) (sp + 1);
1600
1601                 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1602                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1603
1604                 for (i = 0; ; i++) {
1605                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1606                         if (!aalg)
1607                                 break;
1608                         if (aalg->available)
1609                                 *ap++ = aalg->desc;
1610                 }
1611         }
1612
1613         if (enc_len) {
1614                 struct sadb_supported *sp;
1615                 struct sadb_alg *ap;
1616
1617                 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1618                 ap = (struct sadb_alg *) (sp + 1);
1619
1620                 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1621                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1622
1623                 for (i = 0; ; i++) {
1624                         struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1625                         if (!ealg)
1626                                 break;
1627                         if (ealg->available)
1628                                 *ap++ = ealg->desc;
1629                 }
1630         }
1631
1632 out_put_algs:
1633         return skb;
1634 }
1635
1636 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1637 {
1638         struct pfkey_sock *pfk = pfkey_sk(sk);
1639         struct sk_buff *supp_skb;
1640
1641         if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1642                 return -EINVAL;
1643
1644         if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1645                 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1646                         return -EEXIST;
1647                 pfk->registered |= (1<<hdr->sadb_msg_satype);
1648         }
1649
1650         xfrm_probe_algs();
1651
1652         supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1653         if (!supp_skb) {
1654                 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1655                         pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1656
1657                 return -ENOBUFS;
1658         }
1659
1660         pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1661
1662         return 0;
1663 }
1664
1665 static int key_notify_sa_flush(struct km_event *c)
1666 {
1667         struct sk_buff *skb;
1668         struct sadb_msg *hdr;
1669
1670         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1671         if (!skb)
1672                 return -ENOBUFS;
1673         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1674         hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1675         hdr->sadb_msg_type = SADB_FLUSH;
1676         hdr->sadb_msg_seq = c->seq;
1677         hdr->sadb_msg_pid = c->pid;
1678         hdr->sadb_msg_version = PF_KEY_V2;
1679         hdr->sadb_msg_errno = (uint8_t) 0;
1680         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1681
1682         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1683
1684         return 0;
1685 }
1686
1687 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1688 {
1689         unsigned proto;
1690         struct km_event c;
1691         struct xfrm_audit audit_info;
1692         int err;
1693
1694         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1695         if (proto == 0)
1696                 return -EINVAL;
1697
1698         audit_info.loginuid = audit_get_loginuid(current);
1699         audit_info.secid = 0;
1700         err = xfrm_state_flush(proto, &audit_info);
1701         if (err)
1702                 return err;
1703         c.data.proto = proto;
1704         c.seq = hdr->sadb_msg_seq;
1705         c.pid = hdr->sadb_msg_pid;
1706         c.event = XFRM_MSG_FLUSHSA;
1707         km_state_notify(NULL, &c);
1708
1709         return 0;
1710 }
1711
1712 struct pfkey_dump_data
1713 {
1714         struct sk_buff *skb;
1715         struct sadb_msg *hdr;
1716         struct sock *sk;
1717 };
1718
1719 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1720 {
1721         struct pfkey_dump_data *data = ptr;
1722         struct sk_buff *out_skb;
1723         struct sadb_msg *out_hdr;
1724
1725         out_skb = pfkey_xfrm_state2msg(x);
1726         if (IS_ERR(out_skb))
1727                 return PTR_ERR(out_skb);
1728
1729         out_hdr = (struct sadb_msg *) out_skb->data;
1730         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1731         out_hdr->sadb_msg_type = SADB_DUMP;
1732         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1733         out_hdr->sadb_msg_errno = 0;
1734         out_hdr->sadb_msg_reserved = 0;
1735         out_hdr->sadb_msg_seq = count;
1736         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1737         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1738         return 0;
1739 }
1740
1741 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1742 {
1743         u8 proto;
1744         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1745         struct xfrm_state_walk walk;
1746         int rc;
1747
1748         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1749         if (proto == 0)
1750                 return -EINVAL;
1751
1752         xfrm_state_walk_init(&walk, proto);
1753         rc = xfrm_state_walk(&walk, dump_sa, &data);
1754         xfrm_state_walk_done(&walk);
1755
1756         return rc;
1757 }
1758
1759 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1760 {
1761         struct pfkey_sock *pfk = pfkey_sk(sk);
1762         int satype = hdr->sadb_msg_satype;
1763
1764         if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1765                 /* XXX we mangle packet... */
1766                 hdr->sadb_msg_errno = 0;
1767                 if (satype != 0 && satype != 1)
1768                         return -EINVAL;
1769                 pfk->promisc = satype;
1770         }
1771         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1772         return 0;
1773 }
1774
1775 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1776 {
1777         int i;
1778         u32 reqid = *(u32*)ptr;
1779
1780         for (i=0; i<xp->xfrm_nr; i++) {
1781                 if (xp->xfrm_vec[i].reqid == reqid)
1782                         return -EEXIST;
1783         }
1784         return 0;
1785 }
1786
1787 static u32 gen_reqid(void)
1788 {
1789         struct xfrm_policy_walk walk;
1790         u32 start;
1791         int rc;
1792         static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1793
1794         start = reqid;
1795         do {
1796                 ++reqid;
1797                 if (reqid == 0)
1798                         reqid = IPSEC_MANUAL_REQID_MAX+1;
1799                 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1800                 rc = xfrm_policy_walk(&walk, check_reqid, (void*)&reqid);
1801                 xfrm_policy_walk_done(&walk);
1802                 if (rc != -EEXIST)
1803                         return reqid;
1804         } while (reqid != start);
1805         return 0;
1806 }
1807
1808 static int
1809 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1810 {
1811         struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1812         struct sockaddr_in *sin;
1813 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1814         struct sockaddr_in6 *sin6;
1815 #endif
1816         int mode;
1817
1818         if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1819                 return -ELOOP;
1820
1821         if (rq->sadb_x_ipsecrequest_mode == 0)
1822                 return -EINVAL;
1823
1824         t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1825         if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1826                 return -EINVAL;
1827         t->mode = mode;
1828         if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1829                 t->optional = 1;
1830         else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1831                 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1832                 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1833                         t->reqid = 0;
1834                 if (!t->reqid && !(t->reqid = gen_reqid()))
1835                         return -ENOBUFS;
1836         }
1837
1838         /* addresses present only in tunnel mode */
1839         if (t->mode == XFRM_MODE_TUNNEL) {
1840                 struct sockaddr *sa;
1841                 sa = (struct sockaddr *)(rq+1);
1842                 switch(sa->sa_family) {
1843                 case AF_INET:
1844                         sin = (struct sockaddr_in*)sa;
1845                         t->saddr.a4 = sin->sin_addr.s_addr;
1846                         sin++;
1847                         if (sin->sin_family != AF_INET)
1848                                 return -EINVAL;
1849                         t->id.daddr.a4 = sin->sin_addr.s_addr;
1850                         break;
1851 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1852                 case AF_INET6:
1853                         sin6 = (struct sockaddr_in6*)sa;
1854                         memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1855                         sin6++;
1856                         if (sin6->sin6_family != AF_INET6)
1857                                 return -EINVAL;
1858                         memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1859                         break;
1860 #endif
1861                 default:
1862                         return -EINVAL;
1863                 }
1864                 t->encap_family = sa->sa_family;
1865         } else
1866                 t->encap_family = xp->family;
1867
1868         /* No way to set this via kame pfkey */
1869         t->aalgos = t->ealgos = t->calgos = ~0;
1870         xp->xfrm_nr++;
1871         return 0;
1872 }
1873
1874 static int
1875 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1876 {
1877         int err;
1878         int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1879         struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1880
1881         while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1882                 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1883                         return err;
1884                 len -= rq->sadb_x_ipsecrequest_len;
1885                 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1886         }
1887         return 0;
1888 }
1889
1890 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1891 {
1892   struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1893
1894         if (xfrm_ctx) {
1895                 int len = sizeof(struct sadb_x_sec_ctx);
1896                 len += xfrm_ctx->ctx_len;
1897                 return PFKEY_ALIGN8(len);
1898         }
1899         return 0;
1900 }
1901
1902 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1903 {
1904         struct xfrm_tmpl *t;
1905         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1906         int socklen = 0;
1907         int i;
1908
1909         for (i=0; i<xp->xfrm_nr; i++) {
1910                 t = xp->xfrm_vec + i;
1911                 socklen += (t->encap_family == AF_INET ?
1912                             sizeof(struct sockaddr_in) :
1913                             sizeof(struct sockaddr_in6));
1914         }
1915
1916         return sizeof(struct sadb_msg) +
1917                 (sizeof(struct sadb_lifetime) * 3) +
1918                 (sizeof(struct sadb_address) * 2) +
1919                 (sockaddr_size * 2) +
1920                 sizeof(struct sadb_x_policy) +
1921                 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1922                 (socklen * 2) +
1923                 pfkey_xfrm_policy2sec_ctx_size(xp);
1924 }
1925
1926 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1927 {
1928         struct sk_buff *skb;
1929         int size;
1930
1931         size = pfkey_xfrm_policy2msg_size(xp);
1932
1933         skb =  alloc_skb(size + 16, GFP_ATOMIC);
1934         if (skb == NULL)
1935                 return ERR_PTR(-ENOBUFS);
1936
1937         return skb;
1938 }
1939
1940 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1941 {
1942         struct sadb_msg *hdr;
1943         struct sadb_address *addr;
1944         struct sadb_lifetime *lifetime;
1945         struct sadb_x_policy *pol;
1946         struct sockaddr_in   *sin;
1947         struct sadb_x_sec_ctx *sec_ctx;
1948         struct xfrm_sec_ctx *xfrm_ctx;
1949 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1950         struct sockaddr_in6  *sin6;
1951 #endif
1952         int i;
1953         int size;
1954         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1955         int socklen = (xp->family == AF_INET ?
1956                        sizeof(struct sockaddr_in) :
1957                        sizeof(struct sockaddr_in6));
1958
1959         size = pfkey_xfrm_policy2msg_size(xp);
1960
1961         /* call should fill header later */
1962         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1963         memset(hdr, 0, size);   /* XXX do we need this ? */
1964
1965         /* src address */
1966         addr = (struct sadb_address*) skb_put(skb,
1967                                               sizeof(struct sadb_address)+sockaddr_size);
1968         addr->sadb_address_len =
1969                 (sizeof(struct sadb_address)+sockaddr_size)/
1970                         sizeof(uint64_t);
1971         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1972         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1973         addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1974         addr->sadb_address_reserved = 0;
1975         /* src address */
1976         if (xp->family == AF_INET) {
1977                 sin = (struct sockaddr_in *) (addr + 1);
1978                 sin->sin_family = AF_INET;
1979                 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1980                 sin->sin_port = xp->selector.sport;
1981                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1982         }
1983 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1984         else if (xp->family == AF_INET6) {
1985                 sin6 = (struct sockaddr_in6 *) (addr + 1);
1986                 sin6->sin6_family = AF_INET6;
1987                 sin6->sin6_port = xp->selector.sport;
1988                 sin6->sin6_flowinfo = 0;
1989                 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1990                        sizeof(struct in6_addr));
1991                 sin6->sin6_scope_id = 0;
1992         }
1993 #endif
1994         else
1995                 BUG();
1996
1997         /* dst address */
1998         addr = (struct sadb_address*) skb_put(skb,
1999                                               sizeof(struct sadb_address)+sockaddr_size);
2000         addr->sadb_address_len =
2001                 (sizeof(struct sadb_address)+sockaddr_size)/
2002                         sizeof(uint64_t);
2003         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2004         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2005         addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2006         addr->sadb_address_reserved = 0;
2007         if (xp->family == AF_INET) {
2008                 sin = (struct sockaddr_in *) (addr + 1);
2009                 sin->sin_family = AF_INET;
2010                 sin->sin_addr.s_addr = xp->selector.daddr.a4;
2011                 sin->sin_port = xp->selector.dport;
2012                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2013         }
2014 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2015         else if (xp->family == AF_INET6) {
2016                 sin6 = (struct sockaddr_in6 *) (addr + 1);
2017                 sin6->sin6_family = AF_INET6;
2018                 sin6->sin6_port = xp->selector.dport;
2019                 sin6->sin6_flowinfo = 0;
2020                 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2021                        sizeof(struct in6_addr));
2022                 sin6->sin6_scope_id = 0;
2023         }
2024 #endif
2025         else
2026                 BUG();
2027
2028         /* hard 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_HARD;
2034         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.hard_packet_limit);
2035         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2036         lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2037         lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2038         /* soft time */
2039         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2040                                                      sizeof(struct sadb_lifetime));
2041         lifetime->sadb_lifetime_len =
2042                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2043         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2044         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.soft_packet_limit);
2045         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2046         lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2047         lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2048         /* current time */
2049         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2050                                                      sizeof(struct sadb_lifetime));
2051         lifetime->sadb_lifetime_len =
2052                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2053         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2054         lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2055         lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2056         lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2057         lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2058
2059         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
2060         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2061         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2062         pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2063         if (xp->action == XFRM_POLICY_ALLOW) {
2064                 if (xp->xfrm_nr)
2065                         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2066                 else
2067                         pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2068         }
2069         pol->sadb_x_policy_dir = dir+1;
2070         pol->sadb_x_policy_id = xp->index;
2071         pol->sadb_x_policy_priority = xp->priority;
2072
2073         for (i=0; i<xp->xfrm_nr; i++) {
2074                 struct sadb_x_ipsecrequest *rq;
2075                 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2076                 int req_size;
2077                 int mode;
2078
2079                 req_size = sizeof(struct sadb_x_ipsecrequest);
2080                 if (t->mode == XFRM_MODE_TUNNEL)
2081                         req_size += ((t->encap_family == AF_INET ?
2082                                      sizeof(struct sockaddr_in) :
2083                                      sizeof(struct sockaddr_in6)) * 2);
2084                 else
2085                         size -= 2*socklen;
2086                 rq = (void*)skb_put(skb, req_size);
2087                 pol->sadb_x_policy_len += req_size/8;
2088                 memset(rq, 0, sizeof(*rq));
2089                 rq->sadb_x_ipsecrequest_len = req_size;
2090                 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2091                 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2092                         return -EINVAL;
2093                 rq->sadb_x_ipsecrequest_mode = mode;
2094                 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2095                 if (t->reqid)
2096                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2097                 if (t->optional)
2098                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2099                 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2100                 if (t->mode == XFRM_MODE_TUNNEL) {
2101                         switch (t->encap_family) {
2102                         case AF_INET:
2103                                 sin = (void*)(rq+1);
2104                                 sin->sin_family = AF_INET;
2105                                 sin->sin_addr.s_addr = t->saddr.a4;
2106                                 sin->sin_port = 0;
2107                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2108                                 sin++;
2109                                 sin->sin_family = AF_INET;
2110                                 sin->sin_addr.s_addr = t->id.daddr.a4;
2111                                 sin->sin_port = 0;
2112                                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2113                                 break;
2114 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2115                         case AF_INET6:
2116                                 sin6 = (void*)(rq+1);
2117                                 sin6->sin6_family = AF_INET6;
2118                                 sin6->sin6_port = 0;
2119                                 sin6->sin6_flowinfo = 0;
2120                                 memcpy(&sin6->sin6_addr, t->saddr.a6,
2121                                        sizeof(struct in6_addr));
2122                                 sin6->sin6_scope_id = 0;
2123
2124                                 sin6++;
2125                                 sin6->sin6_family = AF_INET6;
2126                                 sin6->sin6_port = 0;
2127                                 sin6->sin6_flowinfo = 0;
2128                                 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2129                                        sizeof(struct in6_addr));
2130                                 sin6->sin6_scope_id = 0;
2131                                 break;
2132 #endif
2133                         default:
2134                                 break;
2135                         }
2136                 }
2137         }
2138
2139         /* security context */
2140         if ((xfrm_ctx = xp->security)) {
2141                 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2142
2143                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2144                 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2145                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2146                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2147                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2148                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2149                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2150                        xfrm_ctx->ctx_len);
2151         }
2152
2153         hdr->sadb_msg_len = size / sizeof(uint64_t);
2154         hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2155
2156         return 0;
2157 }
2158
2159 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2160 {
2161         struct sk_buff *out_skb;
2162         struct sadb_msg *out_hdr;
2163         int err;
2164
2165         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2166         if (IS_ERR(out_skb)) {
2167                 err = PTR_ERR(out_skb);
2168                 goto out;
2169         }
2170         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2171         if (err < 0)
2172                 return err;
2173
2174         out_hdr = (struct sadb_msg *) out_skb->data;
2175         out_hdr->sadb_msg_version = PF_KEY_V2;
2176
2177         if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2178                 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2179         else
2180                 out_hdr->sadb_msg_type = event2poltype(c->event);
2181         out_hdr->sadb_msg_errno = 0;
2182         out_hdr->sadb_msg_seq = c->seq;
2183         out_hdr->sadb_msg_pid = c->pid;
2184         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2185 out:
2186         return 0;
2187
2188 }
2189
2190 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2191 {
2192         int err = 0;
2193         struct sadb_lifetime *lifetime;
2194         struct sadb_address *sa;
2195         struct sadb_x_policy *pol;
2196         struct xfrm_policy *xp;
2197         struct km_event c;
2198         struct sadb_x_sec_ctx *sec_ctx;
2199
2200         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2201                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2202             !ext_hdrs[SADB_X_EXT_POLICY-1])
2203                 return -EINVAL;
2204
2205         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2206         if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2207                 return -EINVAL;
2208         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2209                 return -EINVAL;
2210
2211         xp = xfrm_policy_alloc(GFP_KERNEL);
2212         if (xp == NULL)
2213                 return -ENOBUFS;
2214
2215         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2216                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2217         xp->priority = pol->sadb_x_policy_priority;
2218
2219         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2220         xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2221         if (!xp->family) {
2222                 err = -EINVAL;
2223                 goto out;
2224         }
2225         xp->selector.family = xp->family;
2226         xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2227         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2228         xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2229         if (xp->selector.sport)
2230                 xp->selector.sport_mask = htons(0xffff);
2231
2232         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2233         pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2234         xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2235
2236         /* Amusing, we set this twice.  KAME apps appear to set same value
2237          * in both addresses.
2238          */
2239         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2240
2241         xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2242         if (xp->selector.dport)
2243                 xp->selector.dport_mask = htons(0xffff);
2244
2245         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2246         if (sec_ctx != NULL) {
2247                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2248
2249                 if (!uctx) {
2250                         err = -ENOBUFS;
2251                         goto out;
2252                 }
2253
2254                 err = security_xfrm_policy_alloc(xp, uctx);
2255                 kfree(uctx);
2256
2257                 if (err)
2258                         goto out;
2259         }
2260
2261         xp->lft.soft_byte_limit = XFRM_INF;
2262         xp->lft.hard_byte_limit = XFRM_INF;
2263         xp->lft.soft_packet_limit = XFRM_INF;
2264         xp->lft.hard_packet_limit = XFRM_INF;
2265         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2266                 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2267                 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2268                 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2269                 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2270         }
2271         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2272                 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2273                 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2274                 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2275                 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2276         }
2277         xp->xfrm_nr = 0;
2278         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2279             (err = parse_ipsecrequests(xp, pol)) < 0)
2280                 goto out;
2281
2282         err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2283                                  hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2284
2285         xfrm_audit_policy_add(xp, err ? 0 : 1,
2286                              audit_get_loginuid(current), 0);
2287
2288         if (err)
2289                 goto out;
2290
2291         if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2292                 c.event = XFRM_MSG_UPDPOLICY;
2293         else
2294                 c.event = XFRM_MSG_NEWPOLICY;
2295
2296         c.seq = hdr->sadb_msg_seq;
2297         c.pid = hdr->sadb_msg_pid;
2298
2299         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2300         xfrm_pol_put(xp);
2301         return 0;
2302
2303 out:
2304         xp->dead = 1;
2305         xfrm_policy_destroy(xp);
2306         return err;
2307 }
2308
2309 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2310 {
2311         int err;
2312         struct sadb_address *sa;
2313         struct sadb_x_policy *pol;
2314         struct xfrm_policy *xp, tmp;
2315         struct xfrm_selector sel;
2316         struct km_event c;
2317         struct sadb_x_sec_ctx *sec_ctx;
2318
2319         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2320                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2321             !ext_hdrs[SADB_X_EXT_POLICY-1])
2322                 return -EINVAL;
2323
2324         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2325         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2326                 return -EINVAL;
2327
2328         memset(&sel, 0, sizeof(sel));
2329
2330         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2331         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2332         sel.prefixlen_s = sa->sadb_address_prefixlen;
2333         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2334         sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2335         if (sel.sport)
2336                 sel.sport_mask = htons(0xffff);
2337
2338         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2339         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2340         sel.prefixlen_d = sa->sadb_address_prefixlen;
2341         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2342         sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2343         if (sel.dport)
2344                 sel.dport_mask = htons(0xffff);
2345
2346         sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2347         memset(&tmp, 0, sizeof(struct xfrm_policy));
2348
2349         if (sec_ctx != NULL) {
2350                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2351
2352                 if (!uctx)
2353                         return -ENOMEM;
2354
2355                 err = security_xfrm_policy_alloc(&tmp, uctx);
2356                 kfree(uctx);
2357
2358                 if (err)
2359                         return err;
2360         }
2361
2362         xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
2363                                    &sel, tmp.security, 1, &err);
2364         security_xfrm_policy_free(&tmp);
2365
2366         if (xp == NULL)
2367                 return -ENOENT;
2368
2369         xfrm_audit_policy_delete(xp, err ? 0 : 1,
2370                                 audit_get_loginuid(current), 0);
2371
2372         if (err)
2373                 goto out;
2374
2375         c.seq = hdr->sadb_msg_seq;
2376         c.pid = hdr->sadb_msg_pid;
2377         c.event = XFRM_MSG_DELPOLICY;
2378         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2379
2380 out:
2381         xfrm_pol_put(xp);
2382         return err;
2383 }
2384
2385 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2386 {
2387         int err;
2388         struct sk_buff *out_skb;
2389         struct sadb_msg *out_hdr;
2390         err = 0;
2391
2392         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2393         if (IS_ERR(out_skb)) {
2394                 err =  PTR_ERR(out_skb);
2395                 goto out;
2396         }
2397         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2398         if (err < 0)
2399                 goto out;
2400
2401         out_hdr = (struct sadb_msg *) out_skb->data;
2402         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2403         out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2404         out_hdr->sadb_msg_satype = 0;
2405         out_hdr->sadb_msg_errno = 0;
2406         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2407         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2408         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2409         err = 0;
2410
2411 out:
2412         return err;
2413 }
2414
2415 #ifdef CONFIG_NET_KEY_MIGRATE
2416 static int pfkey_sockaddr_pair_size(sa_family_t family)
2417 {
2418         switch (family) {
2419         case AF_INET:
2420                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2421 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2422         case AF_INET6:
2423                 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2424 #endif
2425         default:
2426                 return 0;
2427         }
2428         /* NOTREACHED */
2429 }
2430
2431 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2432                                xfrm_address_t *saddr, xfrm_address_t *daddr,
2433                                u16 *family)
2434 {
2435         struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2436         if (rq->sadb_x_ipsecrequest_len <
2437             pfkey_sockaddr_pair_size(sa->sa_family))
2438                 return -EINVAL;
2439
2440         switch (sa->sa_family) {
2441         case AF_INET:
2442                 {
2443                         struct sockaddr_in *sin;
2444                         sin = (struct sockaddr_in *)sa;
2445                         if ((sin+1)->sin_family != AF_INET)
2446                                 return -EINVAL;
2447                         memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2448                         sin++;
2449                         memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2450                         *family = AF_INET;
2451                         break;
2452                 }
2453 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2454         case AF_INET6:
2455                 {
2456                         struct sockaddr_in6 *sin6;
2457                         sin6 = (struct sockaddr_in6 *)sa;
2458                         if ((sin6+1)->sin6_family != AF_INET6)
2459                                 return -EINVAL;
2460                         memcpy(&saddr->a6, &sin6->sin6_addr,
2461                                sizeof(saddr->a6));
2462                         sin6++;
2463                         memcpy(&daddr->a6, &sin6->sin6_addr,
2464                                sizeof(daddr->a6));
2465                         *family = AF_INET6;
2466                         break;
2467                 }
2468 #endif
2469         default:
2470                 return -EINVAL;
2471         }
2472
2473         return 0;
2474 }
2475
2476 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2477                                     struct xfrm_migrate *m)
2478 {
2479         int err;
2480         struct sadb_x_ipsecrequest *rq2;
2481         int mode;
2482
2483         if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2484             len < rq1->sadb_x_ipsecrequest_len)
2485                 return -EINVAL;
2486
2487         /* old endoints */
2488         err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2489                                   &m->old_family);
2490         if (err)
2491                 return err;
2492
2493         rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2494         len -= rq1->sadb_x_ipsecrequest_len;
2495
2496         if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2497             len < rq2->sadb_x_ipsecrequest_len)
2498                 return -EINVAL;
2499
2500         /* new endpoints */
2501         err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2502                                   &m->new_family);
2503         if (err)
2504                 return err;
2505
2506         if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2507             rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2508             rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2509                 return -EINVAL;
2510
2511         m->proto = rq1->sadb_x_ipsecrequest_proto;
2512         if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2513                 return -EINVAL;
2514         m->mode = mode;
2515         m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2516
2517         return ((int)(rq1->sadb_x_ipsecrequest_len +
2518                       rq2->sadb_x_ipsecrequest_len));
2519 }
2520
2521 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2522                          struct sadb_msg *hdr, void **ext_hdrs)
2523 {
2524         int i, len, ret, err = -EINVAL;
2525         u8 dir;
2526         struct sadb_address *sa;
2527         struct sadb_x_policy *pol;
2528         struct sadb_x_ipsecrequest *rq;
2529         struct xfrm_selector sel;
2530         struct xfrm_migrate m[XFRM_MAX_DEPTH];
2531
2532         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2533             ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2534             !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2535                 err = -EINVAL;
2536                 goto out;
2537         }
2538
2539         pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2540         if (!pol) {
2541                 err = -EINVAL;
2542                 goto out;
2543         }
2544
2545         if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2546                 err = -EINVAL;
2547                 goto out;
2548         }
2549
2550         dir = pol->sadb_x_policy_dir - 1;
2551         memset(&sel, 0, sizeof(sel));
2552
2553         /* set source address info of selector */
2554         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2555         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2556         sel.prefixlen_s = sa->sadb_address_prefixlen;
2557         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2558         sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2559         if (sel.sport)
2560                 sel.sport_mask = htons(0xffff);
2561
2562         /* set destination address info of selector */
2563         sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2564         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2565         sel.prefixlen_d = sa->sadb_address_prefixlen;
2566         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2567         sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2568         if (sel.dport)
2569                 sel.dport_mask = htons(0xffff);
2570
2571         rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2572
2573         /* extract ipsecrequests */
2574         i = 0;
2575         len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2576
2577         while (len > 0 && i < XFRM_MAX_DEPTH) {
2578                 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2579                 if (ret < 0) {
2580                         err = ret;
2581                         goto out;
2582                 } else {
2583                         rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2584                         len -= ret;
2585                         i++;
2586                 }
2587         }
2588
2589         if (!i || len > 0) {
2590                 err = -EINVAL;
2591                 goto out;
2592         }
2593
2594         return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2595
2596  out:
2597         return err;
2598 }
2599 #else
2600 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2601                          struct sadb_msg *hdr, void **ext_hdrs)
2602 {
2603         return -ENOPROTOOPT;
2604 }
2605 #endif
2606
2607
2608 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2609 {
2610         unsigned int dir;
2611         int err = 0, delete;
2612         struct sadb_x_policy *pol;
2613         struct xfrm_policy *xp;
2614         struct km_event c;
2615
2616         if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2617                 return -EINVAL;
2618
2619         dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2620         if (dir >= XFRM_POLICY_MAX)
2621                 return -EINVAL;
2622
2623         delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2624         xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2625                               delete, &err);
2626         if (xp == NULL)
2627                 return -ENOENT;
2628
2629         if (delete) {
2630                 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2631                                 audit_get_loginuid(current), 0);
2632
2633                 if (err)
2634                         goto out;
2635                 c.seq = hdr->sadb_msg_seq;
2636                 c.pid = hdr->sadb_msg_pid;
2637                 c.data.byid = 1;
2638                 c.event = XFRM_MSG_DELPOLICY;
2639                 km_policy_notify(xp, dir, &c);
2640         } else {
2641                 err = key_pol_get_resp(sk, xp, hdr, dir);
2642         }
2643
2644 out:
2645         xfrm_pol_put(xp);
2646         return err;
2647 }
2648
2649 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2650 {
2651         struct pfkey_dump_data *data = ptr;
2652         struct sk_buff *out_skb;
2653         struct sadb_msg *out_hdr;
2654         int err;
2655
2656         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2657         if (IS_ERR(out_skb))
2658                 return PTR_ERR(out_skb);
2659
2660         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2661         if (err < 0)
2662                 return err;
2663
2664         out_hdr = (struct sadb_msg *) out_skb->data;
2665         out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2666         out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2667         out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2668         out_hdr->sadb_msg_errno = 0;
2669         out_hdr->sadb_msg_seq = count;
2670         out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2671         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2672         return 0;
2673 }
2674
2675 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2676 {
2677         struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2678         struct xfrm_policy_walk walk;
2679         int rc;
2680
2681         xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
2682         rc = xfrm_policy_walk(&walk, dump_sp, &data);
2683         xfrm_policy_walk_done(&walk);
2684
2685         return rc;
2686 }
2687
2688 static int key_notify_policy_flush(struct km_event *c)
2689 {
2690         struct sk_buff *skb_out;
2691         struct sadb_msg *hdr;
2692
2693         skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2694         if (!skb_out)
2695                 return -ENOBUFS;
2696         hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2697         hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2698         hdr->sadb_msg_seq = c->seq;
2699         hdr->sadb_msg_pid = c->pid;
2700         hdr->sadb_msg_version = PF_KEY_V2;
2701         hdr->sadb_msg_errno = (uint8_t) 0;
2702         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2703         pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2704         return 0;
2705
2706 }
2707
2708 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2709 {
2710         struct km_event c;
2711         struct xfrm_audit audit_info;
2712         int err;
2713
2714         audit_info.loginuid = audit_get_loginuid(current);
2715         audit_info.secid = 0;
2716         err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2717         if (err)
2718                 return err;
2719         c.data.type = XFRM_POLICY_TYPE_MAIN;
2720         c.event = XFRM_MSG_FLUSHPOLICY;
2721         c.pid = hdr->sadb_msg_pid;
2722         c.seq = hdr->sadb_msg_seq;
2723         km_policy_notify(NULL, 0, &c);
2724
2725         return 0;
2726 }
2727
2728 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2729                              struct sadb_msg *hdr, void **ext_hdrs);
2730 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2731         [SADB_RESERVED]         = pfkey_reserved,
2732         [SADB_GETSPI]           = pfkey_getspi,
2733         [SADB_UPDATE]           = pfkey_add,
2734         [SADB_ADD]              = pfkey_add,
2735         [SADB_DELETE]           = pfkey_delete,
2736         [SADB_GET]              = pfkey_get,
2737         [SADB_ACQUIRE]          = pfkey_acquire,
2738         [SADB_REGISTER]         = pfkey_register,
2739         [SADB_EXPIRE]           = NULL,
2740         [SADB_FLUSH]            = pfkey_flush,
2741         [SADB_DUMP]             = pfkey_dump,
2742         [SADB_X_PROMISC]        = pfkey_promisc,
2743         [SADB_X_PCHANGE]        = NULL,
2744         [SADB_X_SPDUPDATE]      = pfkey_spdadd,
2745         [SADB_X_SPDADD]         = pfkey_spdadd,
2746         [SADB_X_SPDDELETE]      = pfkey_spddelete,
2747         [SADB_X_SPDGET]         = pfkey_spdget,
2748         [SADB_X_SPDACQUIRE]     = NULL,
2749         [SADB_X_SPDDUMP]        = pfkey_spddump,
2750         [SADB_X_SPDFLUSH]       = pfkey_spdflush,
2751         [SADB_X_SPDSETIDX]      = pfkey_spdadd,
2752         [SADB_X_SPDDELETE2]     = pfkey_spdget,
2753         [SADB_X_MIGRATE]        = pfkey_migrate,
2754 };
2755
2756 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2757 {
2758         void *ext_hdrs[SADB_EXT_MAX];
2759         int err;
2760
2761         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2762                         BROADCAST_PROMISC_ONLY, NULL);
2763
2764         memset(ext_hdrs, 0, sizeof(ext_hdrs));
2765         err = parse_exthdrs(skb, hdr, ext_hdrs);
2766         if (!err) {
2767                 err = -EOPNOTSUPP;
2768                 if (pfkey_funcs[hdr->sadb_msg_type])
2769                         err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2770         }
2771         return err;
2772 }
2773
2774 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2775 {
2776         struct sadb_msg *hdr = NULL;
2777
2778         if (skb->len < sizeof(*hdr)) {
2779                 *errp = -EMSGSIZE;
2780         } else {
2781                 hdr = (struct sadb_msg *) skb->data;
2782                 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2783                     hdr->sadb_msg_reserved != 0 ||
2784                     (hdr->sadb_msg_type <= SADB_RESERVED ||
2785                      hdr->sadb_msg_type > SADB_MAX)) {
2786                         hdr = NULL;
2787                         *errp = -EINVAL;
2788                 } else if (hdr->sadb_msg_len != (skb->len /
2789                                                  sizeof(uint64_t)) ||
2790                            hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2791                                                 sizeof(uint64_t))) {
2792                         hdr = NULL;
2793                         *errp = -EMSGSIZE;
2794                 } else {
2795                         *errp = 0;
2796                 }
2797         }
2798         return hdr;
2799 }
2800
2801 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2802 {
2803         unsigned int id = d->desc.sadb_alg_id;
2804
2805         if (id >= sizeof(t->aalgos) * 8)
2806                 return 0;
2807
2808         return (t->aalgos >> id) & 1;
2809 }
2810
2811 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2812 {
2813         unsigned int id = d->desc.sadb_alg_id;
2814
2815         if (id >= sizeof(t->ealgos) * 8)
2816                 return 0;
2817
2818         return (t->ealgos >> id) & 1;
2819 }
2820
2821 static int count_ah_combs(struct xfrm_tmpl *t)
2822 {
2823         int i, sz = 0;
2824
2825         for (i = 0; ; i++) {
2826                 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2827                 if (!aalg)
2828                         break;
2829                 if (aalg_tmpl_set(t, aalg) && aalg->available)
2830                         sz += sizeof(struct sadb_comb);
2831         }
2832         return sz + sizeof(struct sadb_prop);
2833 }
2834
2835 static int count_esp_combs(struct xfrm_tmpl *t)
2836 {
2837         int i, k, sz = 0;
2838
2839         for (i = 0; ; i++) {
2840                 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2841                 if (!ealg)
2842                         break;
2843
2844                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2845                         continue;
2846
2847                 for (k = 1; ; k++) {
2848                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2849                         if (!aalg)
2850                                 break;
2851
2852                         if (aalg_tmpl_set(t, aalg) && aalg->available)
2853                                 sz += sizeof(struct sadb_comb);
2854                 }
2855         }
2856         return sz + sizeof(struct sadb_prop);
2857 }
2858
2859 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2860 {
2861         struct sadb_prop *p;
2862         int i;
2863
2864         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2865         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2866         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2867         p->sadb_prop_replay = 32;
2868         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2869
2870         for (i = 0; ; i++) {
2871                 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2872                 if (!aalg)
2873                         break;
2874
2875                 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2876                         struct sadb_comb *c;
2877                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2878                         memset(c, 0, sizeof(*c));
2879                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2880                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2881                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2882                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2883                         c->sadb_comb_hard_addtime = 24*60*60;
2884                         c->sadb_comb_soft_addtime = 20*60*60;
2885                         c->sadb_comb_hard_usetime = 8*60*60;
2886                         c->sadb_comb_soft_usetime = 7*60*60;
2887                 }
2888         }
2889 }
2890
2891 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2892 {
2893         struct sadb_prop *p;
2894         int i, k;
2895
2896         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2897         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2898         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2899         p->sadb_prop_replay = 32;
2900         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2901
2902         for (i=0; ; i++) {
2903                 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2904                 if (!ealg)
2905                         break;
2906
2907                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2908                         continue;
2909
2910                 for (k = 1; ; k++) {
2911                         struct sadb_comb *c;
2912                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2913                         if (!aalg)
2914                                 break;
2915                         if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2916                                 continue;
2917                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2918                         memset(c, 0, sizeof(*c));
2919                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2920                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2921                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2922                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2923                         c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2924                         c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2925                         c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2926                         c->sadb_comb_hard_addtime = 24*60*60;
2927                         c->sadb_comb_soft_addtime = 20*60*60;
2928                         c->sadb_comb_hard_usetime = 8*60*60;
2929                         c->sadb_comb_soft_usetime = 7*60*60;
2930                 }
2931         }
2932 }
2933
2934 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2935 {
2936         return 0;
2937 }
2938
2939 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2940 {
2941         struct sk_buff *out_skb;
2942         struct sadb_msg *out_hdr;
2943         int hard;
2944         int hsc;
2945
2946         hard = c->data.hard;
2947         if (hard)
2948                 hsc = 2;
2949         else
2950                 hsc = 1;
2951
2952         out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
2953         if (IS_ERR(out_skb))
2954                 return PTR_ERR(out_skb);
2955
2956         out_hdr = (struct sadb_msg *) out_skb->data;
2957         out_hdr->sadb_msg_version = PF_KEY_V2;
2958         out_hdr->sadb_msg_type = SADB_EXPIRE;
2959         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2960         out_hdr->sadb_msg_errno = 0;
2961         out_hdr->sadb_msg_reserved = 0;
2962         out_hdr->sadb_msg_seq = 0;
2963         out_hdr->sadb_msg_pid = 0;
2964
2965         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2966         return 0;
2967 }
2968
2969 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2970 {
2971         switch (c->event) {
2972         case XFRM_MSG_EXPIRE:
2973                 return key_notify_sa_expire(x, c);
2974         case XFRM_MSG_DELSA:
2975         case XFRM_MSG_NEWSA:
2976         case XFRM_MSG_UPDSA:
2977                 return key_notify_sa(x, c);
2978         case XFRM_MSG_FLUSHSA:
2979                 return key_notify_sa_flush(c);
2980         case XFRM_MSG_NEWAE: /* not yet supported */
2981                 break;
2982         default:
2983                 printk("pfkey: Unknown SA event %d\n", c->event);
2984                 break;
2985         }
2986
2987         return 0;
2988 }
2989
2990 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2991 {
2992         if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2993                 return 0;
2994
2995         switch (c->event) {
2996         case XFRM_MSG_POLEXPIRE:
2997                 return key_notify_policy_expire(xp, c);
2998         case XFRM_MSG_DELPOLICY:
2999         case XFRM_MSG_NEWPOLICY:
3000         case XFRM_MSG_UPDPOLICY:
3001                 return key_notify_policy(xp, dir, c);
3002         case XFRM_MSG_FLUSHPOLICY:
3003                 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3004                         break;
3005                 return key_notify_policy_flush(c);
3006         default:
3007                 printk("pfkey: Unknown policy event %d\n", c->event);
3008                 break;
3009         }
3010
3011         return 0;
3012 }
3013
3014 static u32 get_acqseq(void)
3015 {
3016         u32 res;
3017         static u32 acqseq;
3018         static DEFINE_SPINLOCK(acqseq_lock);
3019
3020         spin_lock_bh(&acqseq_lock);
3021         res = (++acqseq ? : ++acqseq);
3022         spin_unlock_bh(&acqseq_lock);
3023         return res;
3024 }
3025
3026 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
3027 {
3028         struct sk_buff *skb;
3029         struct sadb_msg *hdr;
3030         struct sadb_address *addr;
3031         struct sadb_x_policy *pol;
3032         struct sockaddr_in *sin;
3033 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3034         struct sockaddr_in6 *sin6;
3035 #endif
3036         int sockaddr_size;
3037         int size;
3038         struct sadb_x_sec_ctx *sec_ctx;
3039         struct xfrm_sec_ctx *xfrm_ctx;
3040         int ctx_size = 0;
3041
3042         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3043         if (!sockaddr_size)
3044                 return -EINVAL;
3045
3046         size = sizeof(struct sadb_msg) +
3047                 (sizeof(struct sadb_address) * 2) +
3048                 (sockaddr_size * 2) +
3049                 sizeof(struct sadb_x_policy);
3050
3051         if (x->id.proto == IPPROTO_AH)
3052                 size += count_ah_combs(t);
3053         else if (x->id.proto == IPPROTO_ESP)
3054                 size += count_esp_combs(t);
3055
3056         if ((xfrm_ctx = x->security)) {
3057                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3058                 size +=  sizeof(struct sadb_x_sec_ctx) + ctx_size;
3059         }
3060
3061         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3062         if (skb == NULL)
3063                 return -ENOMEM;
3064
3065         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3066         hdr->sadb_msg_version = PF_KEY_V2;
3067         hdr->sadb_msg_type = SADB_ACQUIRE;
3068         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3069         hdr->sadb_msg_len = size / sizeof(uint64_t);
3070         hdr->sadb_msg_errno = 0;
3071         hdr->sadb_msg_reserved = 0;
3072         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3073         hdr->sadb_msg_pid = 0;
3074
3075         /* src address */
3076         addr = (struct sadb_address*) skb_put(skb,
3077                                               sizeof(struct sadb_address)+sockaddr_size);
3078         addr->sadb_address_len =
3079                 (sizeof(struct sadb_address)+sockaddr_size)/
3080                         sizeof(uint64_t);
3081         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3082         addr->sadb_address_proto = 0;
3083         addr->sadb_address_reserved = 0;
3084         if (x->props.family == AF_INET) {
3085                 addr->sadb_address_prefixlen = 32;
3086
3087                 sin = (struct sockaddr_in *) (addr + 1);
3088                 sin->sin_family = AF_INET;
3089                 sin->sin_addr.s_addr = x->props.saddr.a4;
3090                 sin->sin_port = 0;
3091                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3092         }
3093 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3094         else if (x->props.family == AF_INET6) {
3095                 addr->sadb_address_prefixlen = 128;
3096
3097                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3098                 sin6->sin6_family = AF_INET6;
3099                 sin6->sin6_port = 0;
3100                 sin6->sin6_flowinfo = 0;
3101                 memcpy(&sin6->sin6_addr,
3102                        x->props.saddr.a6, sizeof(struct in6_addr));
3103                 sin6->sin6_scope_id = 0;
3104         }
3105 #endif
3106         else
3107                 BUG();
3108
3109         /* dst address */
3110         addr = (struct sadb_address*) skb_put(skb,
3111                                               sizeof(struct sadb_address)+sockaddr_size);
3112         addr->sadb_address_len =
3113                 (sizeof(struct sadb_address)+sockaddr_size)/
3114                         sizeof(uint64_t);
3115         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3116         addr->sadb_address_proto = 0;
3117         addr->sadb_address_reserved = 0;
3118         if (x->props.family == AF_INET) {
3119                 addr->sadb_address_prefixlen = 32;
3120
3121                 sin = (struct sockaddr_in *) (addr + 1);
3122                 sin->sin_family = AF_INET;
3123                 sin->sin_addr.s_addr = x->id.daddr.a4;
3124                 sin->sin_port = 0;
3125                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3126         }
3127 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3128         else if (x->props.family == AF_INET6) {
3129                 addr->sadb_address_prefixlen = 128;
3130
3131                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3132                 sin6->sin6_family = AF_INET6;
3133                 sin6->sin6_port = 0;
3134                 sin6->sin6_flowinfo = 0;
3135                 memcpy(&sin6->sin6_addr,
3136                        x->id.daddr.a6, sizeof(struct in6_addr));
3137                 sin6->sin6_scope_id = 0;
3138         }
3139 #endif
3140         else
3141                 BUG();
3142
3143         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
3144         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3145         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3146         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3147         pol->sadb_x_policy_dir = dir+1;
3148         pol->sadb_x_policy_id = xp->index;
3149
3150         /* Set sadb_comb's. */
3151         if (x->id.proto == IPPROTO_AH)
3152                 dump_ah_combs(skb, t);
3153         else if (x->id.proto == IPPROTO_ESP)
3154                 dump_esp_combs(skb, t);
3155
3156         /* security context */
3157         if (xfrm_ctx) {
3158                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3159                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3160                 sec_ctx->sadb_x_sec_len =
3161                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3162                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3163                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3164                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3165                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3166                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3167                        xfrm_ctx->ctx_len);
3168         }
3169
3170         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3171 }
3172
3173 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3174                                                 u8 *data, int len, int *dir)
3175 {
3176         struct xfrm_policy *xp;
3177         struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3178         struct sadb_x_sec_ctx *sec_ctx;
3179
3180         switch (sk->sk_family) {
3181         case AF_INET:
3182                 if (opt != IP_IPSEC_POLICY) {
3183                         *dir = -EOPNOTSUPP;
3184                         return NULL;
3185                 }
3186                 break;
3187 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3188         case AF_INET6:
3189                 if (opt != IPV6_IPSEC_POLICY) {
3190                         *dir = -EOPNOTSUPP;
3191                         return NULL;
3192                 }
3193                 break;
3194 #endif
3195         default:
3196                 *dir = -EINVAL;
3197                 return NULL;
3198         }
3199
3200         *dir = -EINVAL;
3201
3202         if (len < sizeof(struct sadb_x_policy) ||
3203             pol->sadb_x_policy_len*8 > len ||
3204             pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3205             (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3206                 return NULL;
3207
3208         xp = xfrm_policy_alloc(GFP_ATOMIC);
3209         if (xp == NULL) {
3210                 *dir = -ENOBUFS;
3211                 return NULL;
3212         }
3213
3214         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3215                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3216
3217         xp->lft.soft_byte_limit = XFRM_INF;
3218         xp->lft.hard_byte_limit = XFRM_INF;
3219         xp->lft.soft_packet_limit = XFRM_INF;
3220         xp->lft.hard_packet_limit = XFRM_INF;
3221         xp->family = sk->sk_family;
3222
3223         xp->xfrm_nr = 0;
3224         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3225             (*dir = parse_ipsecrequests(xp, pol)) < 0)
3226                 goto out;
3227
3228         /* security context too */
3229         if (len >= (pol->sadb_x_policy_len*8 +
3230             sizeof(struct sadb_x_sec_ctx))) {
3231                 char *p = (char *)pol;
3232                 struct xfrm_user_sec_ctx *uctx;
3233
3234                 p += pol->sadb_x_policy_len*8;
3235                 sec_ctx = (struct sadb_x_sec_ctx *)p;
3236                 if (len < pol->sadb_x_policy_len*8 +
3237                     sec_ctx->sadb_x_sec_len) {
3238                         *dir = -EINVAL;
3239                         goto out;
3240                 }
3241                 if ((*dir = verify_sec_ctx_len(p)))
3242                         goto out;
3243                 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3244                 *dir = security_xfrm_policy_alloc(xp, uctx);
3245                 kfree(uctx);
3246
3247                 if (*dir)
3248                         goto out;
3249         }
3250
3251         *dir = pol->sadb_x_policy_dir-1;
3252         return xp;
3253
3254 out:
3255         xfrm_policy_destroy(xp);
3256         return NULL;
3257 }
3258
3259 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3260 {
3261         struct sk_buff *skb;
3262         struct sadb_msg *hdr;
3263         struct sadb_sa *sa;
3264         struct sadb_address *addr;
3265         struct sadb_x_nat_t_port *n_port;
3266         struct sockaddr_in *sin;
3267 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3268         struct sockaddr_in6 *sin6;
3269 #endif
3270         int sockaddr_size;
3271         int size;
3272         __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3273         struct xfrm_encap_tmpl *natt = NULL;
3274
3275         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3276         if (!sockaddr_size)
3277                 return -EINVAL;
3278
3279         if (!satype)
3280                 return -EINVAL;
3281
3282         if (!x->encap)
3283                 return -EINVAL;
3284
3285         natt = x->encap;
3286
3287         /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3288          *
3289          * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3290          * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3291          */
3292
3293         size = sizeof(struct sadb_msg) +
3294                 sizeof(struct sadb_sa) +
3295                 (sizeof(struct sadb_address) * 2) +
3296                 (sockaddr_size * 2) +
3297                 (sizeof(struct sadb_x_nat_t_port) * 2);
3298
3299         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3300         if (skb == NULL)
3301                 return -ENOMEM;
3302
3303         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3304         hdr->sadb_msg_version = PF_KEY_V2;
3305         hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3306         hdr->sadb_msg_satype = satype;
3307         hdr->sadb_msg_len = size / sizeof(uint64_t);
3308         hdr->sadb_msg_errno = 0;
3309         hdr->sadb_msg_reserved = 0;
3310         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3311         hdr->sadb_msg_pid = 0;
3312
3313         /* SA */
3314         sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3315         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3316         sa->sadb_sa_exttype = SADB_EXT_SA;
3317         sa->sadb_sa_spi = x->id.spi;
3318         sa->sadb_sa_replay = 0;
3319         sa->sadb_sa_state = 0;
3320         sa->sadb_sa_auth = 0;
3321         sa->sadb_sa_encrypt = 0;
3322         sa->sadb_sa_flags = 0;
3323
3324         /* ADDRESS_SRC (old addr) */
3325         addr = (struct sadb_address*)
3326                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3327         addr->sadb_address_len =
3328                 (sizeof(struct sadb_address)+sockaddr_size)/
3329                         sizeof(uint64_t);
3330         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3331         addr->sadb_address_proto = 0;
3332         addr->sadb_address_reserved = 0;
3333         if (x->props.family == AF_INET) {
3334                 addr->sadb_address_prefixlen = 32;
3335
3336                 sin = (struct sockaddr_in *) (addr + 1);
3337                 sin->sin_family = AF_INET;
3338                 sin->sin_addr.s_addr = x->props.saddr.a4;
3339                 sin->sin_port = 0;
3340                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3341         }
3342 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3343         else if (x->props.family == AF_INET6) {
3344                 addr->sadb_address_prefixlen = 128;
3345
3346                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3347                 sin6->sin6_family = AF_INET6;
3348                 sin6->sin6_port = 0;
3349                 sin6->sin6_flowinfo = 0;
3350                 memcpy(&sin6->sin6_addr,
3351                        x->props.saddr.a6, sizeof(struct in6_addr));
3352                 sin6->sin6_scope_id = 0;
3353         }
3354 #endif
3355         else
3356                 BUG();
3357
3358         /* NAT_T_SPORT (old port) */
3359         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3360         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3361         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3362         n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3363         n_port->sadb_x_nat_t_port_reserved = 0;
3364
3365         /* ADDRESS_DST (new addr) */
3366         addr = (struct sadb_address*)
3367                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3368         addr->sadb_address_len =
3369                 (sizeof(struct sadb_address)+sockaddr_size)/
3370                         sizeof(uint64_t);
3371         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3372         addr->sadb_address_proto = 0;
3373         addr->sadb_address_reserved = 0;
3374         if (x->props.family == AF_INET) {
3375                 addr->sadb_address_prefixlen = 32;
3376
3377                 sin = (struct sockaddr_in *) (addr + 1);
3378                 sin->sin_family = AF_INET;
3379                 sin->sin_addr.s_addr = ipaddr->a4;
3380                 sin->sin_port = 0;
3381                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3382         }
3383 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3384         else if (x->props.family == AF_INET6) {
3385                 addr->sadb_address_prefixlen = 128;
3386
3387                 sin6 = (struct sockaddr_in6 *) (addr + 1);
3388                 sin6->sin6_family = AF_INET6;
3389                 sin6->sin6_port = 0;
3390                 sin6->sin6_flowinfo = 0;
3391                 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3392                 sin6->sin6_scope_id = 0;
3393         }
3394 #endif
3395         else
3396                 BUG();
3397
3398         /* NAT_T_DPORT (new port) */
3399         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3400         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3401         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3402         n_port->sadb_x_nat_t_port_port = sport;
3403         n_port->sadb_x_nat_t_port_reserved = 0;
3404
3405         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3406 }
3407
3408 #ifdef CONFIG_NET_KEY_MIGRATE
3409 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3410                             struct xfrm_selector *sel)
3411 {
3412         struct sadb_address *addr;
3413         struct sockaddr_in *sin;
3414 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3415         struct sockaddr_in6 *sin6;
3416 #endif
3417         addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3418         addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3419         addr->sadb_address_exttype = type;
3420         addr->sadb_address_proto = sel->proto;
3421         addr->sadb_address_reserved = 0;
3422
3423         switch (type) {
3424         case SADB_EXT_ADDRESS_SRC:
3425                 if (sel->family == AF_INET) {
3426                         addr->sadb_address_prefixlen = sel->prefixlen_s;
3427                         sin = (struct sockaddr_in *)(addr + 1);
3428                         sin->sin_family = AF_INET;
3429                         memcpy(&sin->sin_addr.s_addr, &sel->saddr,
3430                                sizeof(sin->sin_addr.s_addr));
3431                         sin->sin_port = 0;
3432                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3433                 }
3434 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3435                 else if (sel->family == AF_INET6) {
3436                         addr->sadb_address_prefixlen = sel->prefixlen_s;
3437                         sin6 = (struct sockaddr_in6 *)(addr + 1);
3438                         sin6->sin6_family = AF_INET6;
3439                         sin6->sin6_port = 0;
3440                         sin6->sin6_flowinfo = 0;
3441                         sin6->sin6_scope_id = 0;
3442                         memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr,
3443                                sizeof(sin6->sin6_addr.s6_addr));
3444                 }
3445 #endif
3446                 break;
3447         case SADB_EXT_ADDRESS_DST:
3448                 if (sel->family == AF_INET) {
3449                         addr->sadb_address_prefixlen = sel->prefixlen_d;
3450                         sin = (struct sockaddr_in *)(addr + 1);
3451                         sin->sin_family = AF_INET;
3452                         memcpy(&sin->sin_addr.s_addr, &sel->daddr,
3453                                sizeof(sin->sin_addr.s_addr));
3454                         sin->sin_port = 0;
3455                         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3456                 }
3457 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3458                 else if (sel->family == AF_INET6) {
3459                         addr->sadb_address_prefixlen = sel->prefixlen_d;
3460                         sin6 = (struct sockaddr_in6 *)(addr + 1);
3461                         sin6->sin6_family = AF_INET6;
3462                         sin6->sin6_port = 0;
3463                         sin6->sin6_flowinfo = 0;
3464                         sin6->sin6_scope_id = 0;
3465                         memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr,
3466                                sizeof(sin6->sin6_addr.s6_addr));
3467                 }
3468 #endif
3469                 break;
3470         default:
3471                 return -EINVAL;
3472         }
3473
3474         return 0;
3475 }
3476
3477 static int set_ipsecrequest(struct sk_buff *skb,
3478                             uint8_t proto, uint8_t mode, int level,
3479                             uint32_t reqid, uint8_t family,
3480                             xfrm_address_t *src, xfrm_address_t *dst)
3481 {
3482         struct sadb_x_ipsecrequest *rq;
3483         struct sockaddr_in *sin;
3484 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3485         struct sockaddr_in6 *sin6;
3486 #endif
3487         int size_req;
3488
3489         size_req = sizeof(struct sadb_x_ipsecrequest) +
3490                    pfkey_sockaddr_pair_size(family);
3491
3492         rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3493         memset(rq, 0, size_req);
3494         rq->sadb_x_ipsecrequest_len = size_req;
3495         rq->sadb_x_ipsecrequest_proto = proto;
3496         rq->sadb_x_ipsecrequest_mode = mode;
3497         rq->sadb_x_ipsecrequest_level = level;
3498         rq->sadb_x_ipsecrequest_reqid = reqid;
3499
3500         switch (family) {
3501         case AF_INET:
3502                 sin = (struct sockaddr_in *)(rq + 1);
3503                 sin->sin_family = AF_INET;
3504                 memcpy(&sin->sin_addr.s_addr, src,
3505                        sizeof(sin->sin_addr.s_addr));
3506                 sin++;
3507                 sin->sin_family = AF_INET;
3508                 memcpy(&sin->sin_addr.s_addr, dst,
3509                        sizeof(sin->sin_addr.s_addr));
3510                 break;
3511 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3512         case AF_INET6:
3513                 sin6 = (struct sockaddr_in6 *)(rq + 1);
3514                 sin6->sin6_family = AF_INET6;
3515                 sin6->sin6_port = 0;
3516                 sin6->sin6_flowinfo = 0;
3517                 sin6->sin6_scope_id = 0;
3518                 memcpy(&sin6->sin6_addr.s6_addr, src,
3519                        sizeof(sin6->sin6_addr.s6_addr));
3520                 sin6++;
3521                 sin6->sin6_family = AF_INET6;
3522                 sin6->sin6_port = 0;
3523                 sin6->sin6_flowinfo = 0;
3524                 sin6->sin6_scope_id = 0;
3525                 memcpy(&sin6->sin6_addr.s6_addr, dst,
3526                        sizeof(sin6->sin6_addr.s6_addr));
3527                 break;
3528 #endif
3529         default:
3530                 return -EINVAL;
3531         }
3532
3533         return 0;
3534 }
3535 #endif
3536
3537 #ifdef CONFIG_NET_KEY_MIGRATE
3538 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3539                               struct xfrm_migrate *m, int num_bundles)
3540 {
3541         int i;
3542         int sasize_sel;
3543         int size = 0;
3544         int size_pol = 0;
3545         struct sk_buff *skb;
3546         struct sadb_msg *hdr;
3547         struct sadb_x_policy *pol;
3548         struct xfrm_migrate *mp;
3549
3550         if (type != XFRM_POLICY_TYPE_MAIN)
3551                 return 0;
3552
3553         if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3554                 return -EINVAL;
3555
3556         /* selector */
3557         sasize_sel = pfkey_sockaddr_size(sel->family);
3558         if (!sasize_sel)
3559                 return -EINVAL;
3560         size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3561
3562         /* policy info */
3563         size_pol += sizeof(struct sadb_x_policy);
3564
3565         /* ipsecrequests */
3566         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3567                 /* old locator pair */
3568                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3569                             pfkey_sockaddr_pair_size(mp->old_family);
3570                 /* new locator pair */
3571                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3572                             pfkey_sockaddr_pair_size(mp->new_family);
3573         }
3574
3575         size += sizeof(struct sadb_msg) + size_pol;
3576
3577         /* alloc buffer */
3578         skb = alloc_skb(size, GFP_ATOMIC);
3579         if (skb == NULL)
3580                 return -ENOMEM;
3581
3582         hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3583         hdr->sadb_msg_version = PF_KEY_V2;
3584         hdr->sadb_msg_type = SADB_X_MIGRATE;
3585         hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3586         hdr->sadb_msg_len = size / 8;
3587         hdr->sadb_msg_errno = 0;
3588         hdr->sadb_msg_reserved = 0;
3589         hdr->sadb_msg_seq = 0;
3590         hdr->sadb_msg_pid = 0;
3591
3592         /* selector src */
3593         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3594
3595         /* selector dst */
3596         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3597
3598         /* policy information */
3599         pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3600         pol->sadb_x_policy_len = size_pol / 8;
3601         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3602         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3603         pol->sadb_x_policy_dir = dir + 1;
3604         pol->sadb_x_policy_id = 0;
3605         pol->sadb_x_policy_priority = 0;
3606
3607         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3608                 /* old ipsecrequest */
3609                 int mode = pfkey_mode_from_xfrm(mp->mode);
3610                 if (mode < 0)
3611                         goto err;
3612                 if (set_ipsecrequest(skb, mp->proto, mode,
3613                                      (mp->reqid ?  IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3614                                      mp->reqid, mp->old_family,
3615                                      &mp->old_saddr, &mp->old_daddr) < 0)
3616                         goto err;
3617
3618                 /* new ipsecrequest */
3619                 if (set_ipsecrequest(skb, mp->proto, mode,
3620                                      (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3621                                      mp->reqid, mp->new_family,
3622                                      &mp->new_saddr, &mp->new_daddr) < 0)
3623                         goto err;
3624         }
3625
3626         /* broadcast migrate message to sockets */
3627         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3628
3629         return 0;
3630
3631 err:
3632         kfree_skb(skb);
3633         return -EINVAL;
3634 }
3635 #else
3636 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3637                               struct xfrm_migrate *m, int num_bundles)
3638 {
3639         return -ENOPROTOOPT;
3640 }
3641 #endif
3642
3643 static int pfkey_sendmsg(struct kiocb *kiocb,
3644                          struct socket *sock, struct msghdr *msg, size_t len)
3645 {
3646         struct sock *sk = sock->sk;
3647         struct sk_buff *skb = NULL;
3648         struct sadb_msg *hdr = NULL;
3649         int err;
3650
3651         err = -EOPNOTSUPP;
3652         if (msg->msg_flags & MSG_OOB)
3653                 goto out;
3654
3655         err = -EMSGSIZE;
3656         if ((unsigned)len > sk->sk_sndbuf - 32)
3657                 goto out;
3658
3659         err = -ENOBUFS;
3660         skb = alloc_skb(len, GFP_KERNEL);
3661         if (skb == NULL)
3662                 goto out;
3663
3664         err = -EFAULT;
3665         if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3666                 goto out;
3667
3668         hdr = pfkey_get_base_msg(skb, &err);
3669         if (!hdr)
3670                 goto out;
3671
3672         mutex_lock(&xfrm_cfg_mutex);
3673         err = pfkey_process(sk, skb, hdr);
3674         mutex_unlock(&xfrm_cfg_mutex);
3675
3676 out:
3677         if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3678                 err = 0;
3679         if (skb)
3680                 kfree_skb(skb);
3681
3682         return err ? : len;
3683 }
3684
3685 static int pfkey_recvmsg(struct kiocb *kiocb,
3686                          struct socket *sock, struct msghdr *msg, size_t len,
3687                          int flags)
3688 {
3689         struct sock *sk = sock->sk;
3690         struct sk_buff *skb;
3691         int copied, err;
3692
3693         err = -EINVAL;
3694         if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3695                 goto out;
3696
3697         msg->msg_namelen = 0;
3698         skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3699         if (skb == NULL)
3700                 goto out;
3701
3702         copied = skb->len;
3703         if (copied > len) {
3704                 msg->msg_flags |= MSG_TRUNC;
3705                 copied = len;
3706         }
3707
3708         skb_reset_transport_header(skb);
3709         err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3710         if (err)
3711                 goto out_free;
3712
3713         sock_recv_timestamp(msg, sk, skb);
3714
3715         err = (flags & MSG_TRUNC) ? skb->len : copied;
3716
3717 out_free:
3718         skb_free_datagram(sk, skb);
3719 out:
3720         return err;
3721 }
3722
3723 static const struct proto_ops pfkey_ops = {
3724         .family         =       PF_KEY,
3725         .owner          =       THIS_MODULE,
3726         /* Operations that make no sense on pfkey sockets. */
3727         .bind           =       sock_no_bind,
3728         .connect        =       sock_no_connect,
3729         .socketpair     =       sock_no_socketpair,
3730         .accept         =       sock_no_accept,
3731         .getname        =       sock_no_getname,
3732         .ioctl          =       sock_no_ioctl,
3733         .listen         =       sock_no_listen,
3734         .shutdown       =       sock_no_shutdown,
3735         .setsockopt     =       sock_no_setsockopt,
3736         .getsockopt     =       sock_no_getsockopt,
3737         .mmap           =       sock_no_mmap,
3738         .sendpage       =       sock_no_sendpage,
3739
3740         /* Now the operations that really occur. */
3741         .release        =       pfkey_release,
3742         .poll           =       datagram_poll,
3743         .sendmsg        =       pfkey_sendmsg,
3744         .recvmsg        =       pfkey_recvmsg,
3745 };
3746
3747 static struct net_proto_family pfkey_family_ops = {
3748         .family =       PF_KEY,
3749         .create =       pfkey_create,
3750         .owner  =       THIS_MODULE,
3751 };
3752
3753 #ifdef CONFIG_PROC_FS
3754 static int pfkey_seq_show(struct seq_file *f, void *v)
3755 {
3756         struct sock *s;
3757
3758         s = (struct sock *)v;
3759         if (v == SEQ_START_TOKEN)
3760                 seq_printf(f ,"sk       RefCnt Rmem   Wmem   User   Inode\n");
3761         else
3762                 seq_printf(f ,"%p %-6d %-6u %-6u %-6u %-6lu\n",
3763                                s,
3764                                atomic_read(&s->sk_refcnt),
3765                                atomic_read(&s->sk_rmem_alloc),
3766                                atomic_read(&s->sk_wmem_alloc),
3767                                sock_i_uid(s),
3768                                sock_i_ino(s)
3769                                );
3770         return 0;
3771 }
3772
3773 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3774 {
3775         struct sock *s;
3776         struct hlist_node *node;
3777         loff_t pos = *ppos;
3778
3779         read_lock(&pfkey_table_lock);
3780         if (pos == 0)
3781                 return SEQ_START_TOKEN;
3782
3783         sk_for_each(s, node, &pfkey_table)
3784                 if (pos-- == 1)
3785                         return s;
3786
3787         return NULL;
3788 }
3789
3790 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3791 {
3792         ++*ppos;
3793         return (v == SEQ_START_TOKEN) ?
3794                 sk_head(&pfkey_table) :
3795                         sk_next((struct sock *)v);
3796 }
3797
3798 static void pfkey_seq_stop(struct seq_file *f, void *v)
3799 {
3800         read_unlock(&pfkey_table_lock);
3801 }
3802
3803 static struct seq_operations pfkey_seq_ops = {
3804         .start  = pfkey_seq_start,
3805         .next   = pfkey_seq_next,
3806         .stop   = pfkey_seq_stop,
3807         .show   = pfkey_seq_show,
3808 };
3809
3810 static int pfkey_seq_open(struct inode *inode, struct file *file)
3811 {
3812         return seq_open(file, &pfkey_seq_ops);
3813 }
3814
3815 static struct file_operations pfkey_proc_ops = {
3816         .open    = pfkey_seq_open,
3817         .read    = seq_read,
3818         .llseek  = seq_lseek,
3819         .release = seq_release,
3820 };
3821
3822 static int pfkey_init_proc(void)
3823 {
3824         struct proc_dir_entry *e;
3825
3826         e = proc_net_fops_create(&init_net, "pfkey", 0, &pfkey_proc_ops);
3827         if (e == NULL)
3828                 return -ENOMEM;
3829
3830         return 0;
3831 }
3832
3833 static void pfkey_exit_proc(void)
3834 {
3835         proc_net_remove(&init_net, "pfkey");
3836 }
3837 #else
3838 static inline int pfkey_init_proc(void)
3839 {
3840         return 0;
3841 }
3842
3843 static inline void pfkey_exit_proc(void)
3844 {
3845 }
3846 #endif
3847
3848 static struct xfrm_mgr pfkeyv2_mgr =
3849 {
3850         .id             = "pfkeyv2",
3851         .notify         = pfkey_send_notify,
3852         .acquire        = pfkey_send_acquire,
3853         .compile_policy = pfkey_compile_policy,
3854         .new_mapping    = pfkey_send_new_mapping,
3855         .notify_policy  = pfkey_send_policy_notify,
3856         .migrate        = pfkey_send_migrate,
3857 };
3858
3859 static void __exit ipsec_pfkey_exit(void)
3860 {
3861         xfrm_unregister_km(&pfkeyv2_mgr);
3862         pfkey_exit_proc();
3863         sock_unregister(PF_KEY);
3864         proto_unregister(&key_proto);
3865 }
3866
3867 static int __init ipsec_pfkey_init(void)
3868 {
3869         int err = proto_register(&key_proto, 0);
3870
3871         if (err != 0)
3872                 goto out;
3873
3874         err = sock_register(&pfkey_family_ops);
3875         if (err != 0)
3876                 goto out_unregister_key_proto;
3877         err = pfkey_init_proc();
3878         if (err != 0)
3879                 goto out_sock_unregister;
3880         err = xfrm_register_km(&pfkeyv2_mgr);
3881         if (err != 0)
3882                 goto out_remove_proc_entry;
3883 out:
3884         return err;
3885 out_remove_proc_entry:
3886         pfkey_exit_proc();
3887 out_sock_unregister:
3888         sock_unregister(PF_KEY);
3889 out_unregister_key_proto:
3890         proto_unregister(&key_proto);
3891         goto out;
3892 }
3893
3894 module_init(ipsec_pfkey_init);
3895 module_exit(ipsec_pfkey_exit);
3896 MODULE_LICENSE("GPL");
3897 MODULE_ALIAS_NETPROTO(PF_KEY);