net/key/af_key.c

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