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 <linux/slab.h>
  30 #include <net/net_namespace.h>
  31 #include <net/netns/generic.h>
  32 #include <net/xfrm.h>
  33
  34 #include <net/sock.h>
  35
  36 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
  37 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
  38
  39 static int pfkey_net_id __read_mostly;
  40 struct netns_pfkey {
  41         /* List of all pfkey sockets. */
  42         struct hlist_head table;
  43         atomic_t socks_nr;
  44 };
  45 static DEFINE_MUTEX(pfkey_mutex);
  46
  47 #define DUMMY_MARK 0
  48 static const struct xfrm_mark dummy_mark = {0, 0};
  49 struct pfkey_sock {
  50         /* struct sock must be the first member of struct pfkey_sock */
  51         struct sock     sk;
  52         int             registered;
  53         int             promisc;
  54
  55         struct {
  56                 uint8_t         msg_version;
  57                 uint32_t        msg_portid;
  58                 int             (*dump)(struct pfkey_sock *sk);
  59                 void            (*done)(struct pfkey_sock *sk);
  60                 union {
  61                         struct xfrm_policy_walk policy;
  62                         struct xfrm_state_walk  state;
  63                 } u;
  64                 struct sk_buff  *skb;
  65         } dump;
  66 };
  67
  68 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
  69 {
  70         return (struct pfkey_sock *)sk;
  71 }
  72
  73 static int pfkey_can_dump(const struct sock *sk)
  74 {
  75         if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
  76                 return 1;
  77         return 0;
  78 }
  79
  80 static void pfkey_terminate_dump(struct pfkey_sock *pfk)
  81 {
  82         if (pfk->dump.dump) {
  83                 if (pfk->dump.skb) {
  84                         kfree_skb(pfk->dump.skb);
  85                         pfk->dump.skb = NULL;
  86                 }
  87                 pfk->dump.done(pfk);
  88                 pfk->dump.dump = NULL;
  89                 pfk->dump.done = NULL;
  90         }
  91 }
  92
  93 static void pfkey_sock_destruct(struct sock *sk)
  94 {
  95         struct net *net = sock_net(sk);
  96         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
  97
  98         pfkey_terminate_dump(pfkey_sk(sk));
  99         skb_queue_purge(&sk->sk_receive_queue);
 100
 101         if (!sock_flag(sk, SOCK_DEAD)) {
 102                 pr_err("Attempt to release alive pfkey socket: %p\n", sk);
 103                 return;
 104         }
 105
 106         WARN_ON(atomic_read(&sk->sk_rmem_alloc));
 107         WARN_ON(atomic_read(&sk->sk_wmem_alloc));
 108
 109         atomic_dec(&net_pfkey->socks_nr);
 110 }
 111
 112 static const struct proto_ops pfkey_ops;
 113
 114 static void pfkey_insert(struct sock *sk)
 115 {
 116         struct net *net = sock_net(sk);
 117         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
 118
 119         mutex_lock(&pfkey_mutex);
 120         sk_add_node_rcu(sk, &net_pfkey->table);
 121         mutex_unlock(&pfkey_mutex);
 122 }
 123
 124 static void pfkey_remove(struct sock *sk)
 125 {
 126         mutex_lock(&pfkey_mutex);
 127         sk_del_node_init_rcu(sk);
 128         mutex_unlock(&pfkey_mutex);
 129 }
 130
 131 static struct proto key_proto = {
 132         .name     = "KEY",
 133         .owner    = THIS_MODULE,
 134         .obj_size = sizeof(struct pfkey_sock),
 135 };
 136
 137 static int pfkey_create(struct net *net, struct socket *sock, int protocol,
 138                         int kern)
 139 {
 140         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
 141         struct sock *sk;
 142         int err;
 143
 144         if (!ns_capable(net->user_ns, 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(net, PF_KEY, GFP_KERNEL, &key_proto);
 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(&net_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
 184         synchronize_rcu();
 185         sock_put(sk);
 186
 187         return 0;
 188 }
 189
 190 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
 191                                gfp_t allocation, struct sock *sk)
 192 {
 193         int err = -ENOBUFS;
 194
 195         sock_hold(sk);
 196         if (*skb2 == NULL) {
 197                 if (atomic_read(&skb->users) != 1) {
 198                         *skb2 = skb_clone(skb, allocation);
 199                 } else {
 200                         *skb2 = skb;
 201                         atomic_inc(&skb->users);
 202                 }
 203         }
 204         if (*skb2 != NULL) {
 205                 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
 206                         skb_set_owner_r(*skb2, sk);
 207                         skb_queue_tail(&sk->sk_receive_queue, *skb2);
 208                         sk->sk_data_ready(sk, (*skb2)->len);
 209                         *skb2 = NULL;
 210                         err = 0;
 211                 }
 212         }
 213         sock_put(sk);
 214         return err;
 215 }
 216
 217 /* Send SKB to all pfkey sockets matching selected criteria.  */
 218 #define BROADCAST_ALL           0
 219 #define BROADCAST_ONE           1
 220 #define BROADCAST_REGISTERED    2
 221 #define BROADCAST_PROMISC_ONLY  4
 222 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
 223                            int broadcast_flags, struct sock *one_sk,
 224                            struct net *net)
 225 {
 226         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
 227         struct sock *sk;
 228         struct sk_buff *skb2 = NULL;
 229         int err = -ESRCH;
 230
 231         /* XXX Do we need something like netlink_overrun?  I think
 232          * XXX PF_KEY socket apps will not mind current behavior.
 233          */
 234         if (!skb)
 235                 return -ENOMEM;
 236
 237         rcu_read_lock();
 238         sk_for_each_rcu(sk, &net_pfkey->table) {
 239                 struct pfkey_sock *pfk = pfkey_sk(sk);
 240                 int err2;
 241
 242                 /* Yes, it means that if you are meant to receive this
 243                  * pfkey message you receive it twice as promiscuous
 244                  * socket.
 245                  */
 246                 if (pfk->promisc)
 247                         pfkey_broadcast_one(skb, &skb2, allocation, sk);
 248
 249                 /* the exact target will be processed later */
 250                 if (sk == one_sk)
 251                         continue;
 252                 if (broadcast_flags != BROADCAST_ALL) {
 253                         if (broadcast_flags & BROADCAST_PROMISC_ONLY)
 254                                 continue;
 255                         if ((broadcast_flags & BROADCAST_REGISTERED) &&
 256                             !pfk->registered)
 257                                 continue;
 258                         if (broadcast_flags & BROADCAST_ONE)
 259                                 continue;
 260                 }
 261
 262                 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
 263
 264                 /* Error is cleare after succecful sending to at least one
 265                  * registered KM */
 266                 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
 267                         err = err2;
 268         }
 269         rcu_read_unlock();
 270
 271         if (one_sk != NULL)
 272                 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
 273
 274         kfree_skb(skb2);
 275         kfree_skb(skb);
 276         return err;
 277 }
 278
 279 static int pfkey_do_dump(struct pfkey_sock *pfk)
 280 {
 281         struct sadb_msg *hdr;
 282         int rc;
 283
 284         rc = pfk->dump.dump(pfk);
 285         if (rc == -ENOBUFS)
 286                 return 0;
 287
 288         if (pfk->dump.skb) {
 289                 if (!pfkey_can_dump(&pfk->sk))
 290                         return 0;
 291
 292                 hdr = (struct sadb_msg *) pfk->dump.skb->data;
 293                 hdr->sadb_msg_seq = 0;
 294                 hdr->sadb_msg_errno = rc;
 295                 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
 296                                 &pfk->sk, sock_net(&pfk->sk));
 297                 pfk->dump.skb = NULL;
 298         }
 299
 300         pfkey_terminate_dump(pfk);
 301         return rc;
 302 }
 303
 304 static inline void pfkey_hdr_dup(struct sadb_msg *new,
 305                                  const struct sadb_msg *orig)
 306 {
 307         *new = *orig;
 308 }
 309
 310 static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk)
 311 {
 312         struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
 313         struct sadb_msg *hdr;
 314
 315         if (!skb)
 316                 return -ENOBUFS;
 317
 318         /* Woe be to the platform trying to support PFKEY yet
 319          * having normal errnos outside the 1-255 range, inclusive.
 320          */
 321         err = -err;
 322         if (err == ERESTARTSYS ||
 323             err == ERESTARTNOHAND ||
 324             err == ERESTARTNOINTR)
 325                 err = EINTR;
 326         if (err >= 512)
 327                 err = EINVAL;
 328         BUG_ON(err <= 0 || err >= 256);
 329
 330         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
 331         pfkey_hdr_dup(hdr, orig);
 332         hdr->sadb_msg_errno = (uint8_t) err;
 333         hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
 334                              sizeof(uint64_t));
 335
 336         pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk));
 337
 338         return 0;
 339 }
 340
 341 static const u8 sadb_ext_min_len[] = {
 342         [SADB_EXT_RESERVED]             = (u8) 0,
 343         [SADB_EXT_SA]                   = (u8) sizeof(struct sadb_sa),
 344         [SADB_EXT_LIFETIME_CURRENT]     = (u8) sizeof(struct sadb_lifetime),
 345         [SADB_EXT_LIFETIME_HARD]        = (u8) sizeof(struct sadb_lifetime),
 346         [SADB_EXT_LIFETIME_SOFT]        = (u8) sizeof(struct sadb_lifetime),
 347         [SADB_EXT_ADDRESS_SRC]          = (u8) sizeof(struct sadb_address),
 348         [SADB_EXT_ADDRESS_DST]          = (u8) sizeof(struct sadb_address),
 349         [SADB_EXT_ADDRESS_PROXY]        = (u8) sizeof(struct sadb_address),
 350         [SADB_EXT_KEY_AUTH]             = (u8) sizeof(struct sadb_key),
 351         [SADB_EXT_KEY_ENCRYPT]          = (u8) sizeof(struct sadb_key),
 352         [SADB_EXT_IDENTITY_SRC]         = (u8) sizeof(struct sadb_ident),
 353         [SADB_EXT_IDENTITY_DST]         = (u8) sizeof(struct sadb_ident),
 354         [SADB_EXT_SENSITIVITY]          = (u8) sizeof(struct sadb_sens),
 355         [SADB_EXT_PROPOSAL]             = (u8) sizeof(struct sadb_prop),
 356         [SADB_EXT_SUPPORTED_AUTH]       = (u8) sizeof(struct sadb_supported),
 357         [SADB_EXT_SUPPORTED_ENCRYPT]    = (u8) sizeof(struct sadb_supported),
 358         [SADB_EXT_SPIRANGE]             = (u8) sizeof(struct sadb_spirange),
 359         [SADB_X_EXT_KMPRIVATE]          = (u8) sizeof(struct sadb_x_kmprivate),
 360         [SADB_X_EXT_POLICY]             = (u8) sizeof(struct sadb_x_policy),
 361         [SADB_X_EXT_SA2]                = (u8) sizeof(struct sadb_x_sa2),
 362         [SADB_X_EXT_NAT_T_TYPE]         = (u8) sizeof(struct sadb_x_nat_t_type),
 363         [SADB_X_EXT_NAT_T_SPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
 364         [SADB_X_EXT_NAT_T_DPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
 365         [SADB_X_EXT_NAT_T_OA]           = (u8) sizeof(struct sadb_address),
 366         [SADB_X_EXT_SEC_CTX]            = (u8) sizeof(struct sadb_x_sec_ctx),
 367         [SADB_X_EXT_KMADDRESS]          = (u8) sizeof(struct sadb_x_kmaddress),
 368         [SADB_X_EXT_FILTER]             = (u8) sizeof(struct sadb_x_filter),
 369 };
 370
 371 /* Verify sadb_address_{len,prefixlen} against sa_family.  */
 372 static int verify_address_len(const void *p)
 373 {
 374         const struct sadb_address *sp = p;
 375         const struct sockaddr *addr = (const struct sockaddr *)(sp + 1);
 376         const struct sockaddr_in *sin;
 377 #if IS_ENABLED(CONFIG_IPV6)
 378         const struct sockaddr_in6 *sin6;
 379 #endif
 380         int len;
 381
 382         switch (addr->sa_family) {
 383         case AF_INET:
 384                 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
 385                 if (sp->sadb_address_len != len ||
 386                     sp->sadb_address_prefixlen > 32)
 387                         return -EINVAL;
 388                 break;
 389 #if IS_ENABLED(CONFIG_IPV6)
 390         case AF_INET6:
 391                 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
 392                 if (sp->sadb_address_len != len ||
 393                     sp->sadb_address_prefixlen > 128)
 394                         return -EINVAL;
 395                 break;
 396 #endif
 397         default:
 398                 /* It is user using kernel to keep track of security
 399                  * associations for another protocol, such as
 400                  * OSPF/RSVP/RIPV2/MIP.  It is user's job to verify
 401                  * lengths.
 402                  *
 403                  * XXX Actually, association/policy database is not yet
 404                  * XXX able to cope with arbitrary sockaddr families.
 405                  * XXX When it can, remove this -EINVAL.  -DaveM
 406                  */
 407                 return -EINVAL;
 408                 break;
 409         }
 410
 411         return 0;
 412 }
 413
 414 static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx)
 415 {
 416         return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
 417                             sec_ctx->sadb_x_ctx_len,
 418                             sizeof(uint64_t));
 419 }
 420
 421 static inline int verify_sec_ctx_len(const void *p)
 422 {
 423         const struct sadb_x_sec_ctx *sec_ctx = p;
 424         int len = sec_ctx->sadb_x_ctx_len;
 425
 426         if (len > PAGE_SIZE)
 427                 return -EINVAL;
 428
 429         len = pfkey_sec_ctx_len(sec_ctx);
 430
 431         if (sec_ctx->sadb_x_sec_len != len)
 432                 return -EINVAL;
 433
 434         return 0;
 435 }
 436
 437 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx,
 438                                                                      gfp_t gfp)
 439 {
 440         struct xfrm_user_sec_ctx *uctx = NULL;
 441         int ctx_size = sec_ctx->sadb_x_ctx_len;
 442
 443         uctx = kmalloc((sizeof(*uctx)+ctx_size), gfp);
 444
 445         if (!uctx)
 446                 return NULL;
 447
 448         uctx->len = pfkey_sec_ctx_len(sec_ctx);
 449         uctx->exttype = sec_ctx->sadb_x_sec_exttype;
 450         uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
 451         uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
 452         uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
 453         memcpy(uctx + 1, sec_ctx + 1,
 454                uctx->ctx_len);
 455
 456         return uctx;
 457 }
 458
 459 static int present_and_same_family(const struct sadb_address *src,
 460                                    const struct sadb_address *dst)
 461 {
 462         const struct sockaddr *s_addr, *d_addr;
 463
 464         if (!src || !dst)
 465                 return 0;
 466
 467         s_addr = (const struct sockaddr *)(src + 1);
 468         d_addr = (const struct sockaddr *)(dst + 1);
 469         if (s_addr->sa_family != d_addr->sa_family)
 470                 return 0;
 471         if (s_addr->sa_family != AF_INET
 472 #if IS_ENABLED(CONFIG_IPV6)
 473             && s_addr->sa_family != AF_INET6
 474 #endif
 475                 )
 476                 return 0;
 477
 478         return 1;
 479 }
 480
 481 static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs)
 482 {
 483         const char *p = (char *) hdr;
 484         int len = skb->len;
 485
 486         len -= sizeof(*hdr);
 487         p += sizeof(*hdr);
 488         while (len > 0) {
 489                 const struct sadb_ext *ehdr = (const struct sadb_ext *) p;
 490                 uint16_t ext_type;
 491                 int ext_len;
 492
 493                 ext_len  = ehdr->sadb_ext_len;
 494                 ext_len *= sizeof(uint64_t);
 495                 ext_type = ehdr->sadb_ext_type;
 496                 if (ext_len < sizeof(uint64_t) ||
 497                     ext_len > len ||
 498                     ext_type == SADB_EXT_RESERVED)
 499                         return -EINVAL;
 500
 501                 if (ext_type <= SADB_EXT_MAX) {
 502                         int min = (int) sadb_ext_min_len[ext_type];
 503                         if (ext_len < min)
 504                                 return -EINVAL;
 505                         if (ext_hdrs[ext_type-1] != NULL)
 506                                 return -EINVAL;
 507                         if (ext_type == SADB_EXT_ADDRESS_SRC ||
 508                             ext_type == SADB_EXT_ADDRESS_DST ||
 509                             ext_type == SADB_EXT_ADDRESS_PROXY ||
 510                             ext_type == SADB_X_EXT_NAT_T_OA) {
 511                                 if (verify_address_len(p))
 512                                         return -EINVAL;
 513                         }
 514                         if (ext_type == SADB_X_EXT_SEC_CTX) {
 515                                 if (verify_sec_ctx_len(p))
 516                                         return -EINVAL;
 517                         }
 518                         ext_hdrs[ext_type-1] = (void *) p;
 519                 }
 520                 p   += ext_len;
 521                 len -= ext_len;
 522         }
 523
 524         return 0;
 525 }
 526
 527 static uint16_t
 528 pfkey_satype2proto(uint8_t satype)
 529 {
 530         switch (satype) {
 531         case SADB_SATYPE_UNSPEC:
 532                 return IPSEC_PROTO_ANY;
 533         case SADB_SATYPE_AH:
 534                 return IPPROTO_AH;
 535         case SADB_SATYPE_ESP:
 536                 return IPPROTO_ESP;
 537         case SADB_X_SATYPE_IPCOMP:
 538                 return IPPROTO_COMP;
 539                 break;
 540         default:
 541                 return 0;
 542         }
 543         /* NOTREACHED */
 544 }
 545
 546 static uint8_t
 547 pfkey_proto2satype(uint16_t proto)
 548 {
 549         switch (proto) {
 550         case IPPROTO_AH:
 551                 return SADB_SATYPE_AH;
 552         case IPPROTO_ESP:
 553                 return SADB_SATYPE_ESP;
 554         case IPPROTO_COMP:
 555                 return SADB_X_SATYPE_IPCOMP;
 556                 break;
 557         default:
 558                 return 0;
 559         }
 560         /* NOTREACHED */
 561 }
 562
 563 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
 564  * say specifically 'just raw sockets' as we encode them as 255.
 565  */
 566
 567 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
 568 {
 569         return proto == IPSEC_PROTO_ANY ? 0 : proto;
 570 }
 571
 572 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
 573 {
 574         return proto ? proto : IPSEC_PROTO_ANY;
 575 }
 576
 577 static inline int pfkey_sockaddr_len(sa_family_t family)
 578 {
 579         switch (family) {
 580         case AF_INET:
 581                 return sizeof(struct sockaddr_in);
 582 #if IS_ENABLED(CONFIG_IPV6)
 583         case AF_INET6:
 584                 return sizeof(struct sockaddr_in6);
 585 #endif
 586         }
 587         return 0;
 588 }
 589
 590 static
 591 int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
 592 {
 593         switch (sa->sa_family) {
 594         case AF_INET:
 595                 xaddr->a4 =
 596                         ((struct sockaddr_in *)sa)->sin_addr.s_addr;
 597                 return AF_INET;
 598 #if IS_ENABLED(CONFIG_IPV6)
 599         case AF_INET6:
 600                 memcpy(xaddr->a6,
 601                        &((struct sockaddr_in6 *)sa)->sin6_addr,
 602                        sizeof(struct in6_addr));
 603                 return AF_INET6;
 604 #endif
 605         }
 606         return 0;
 607 }
 608
 609 static
 610 int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr)
 611 {
 612         return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
 613                                       xaddr);
 614 }
 615
 616 static struct  xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs)
 617 {
 618         const struct sadb_sa *sa;
 619         const struct sadb_address *addr;
 620         uint16_t proto;
 621         unsigned short family;
 622         xfrm_address_t *xaddr;
 623
 624         sa = ext_hdrs[SADB_EXT_SA - 1];
 625         if (sa == NULL)
 626                 return NULL;
 627
 628         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
 629         if (proto == 0)
 630                 return NULL;
 631
 632         /* sadb_address_len should be checked by caller */
 633         addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
 634         if (addr == NULL)
 635                 return NULL;
 636
 637         family = ((const struct sockaddr *)(addr + 1))->sa_family;
 638         switch (family) {
 639         case AF_INET:
 640                 xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr;
 641                 break;
 642 #if IS_ENABLED(CONFIG_IPV6)
 643         case AF_INET6:
 644                 xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr;
 645                 break;
 646 #endif
 647         default:
 648                 xaddr = NULL;
 649         }
 650
 651         if (!xaddr)
 652                 return NULL;
 653
 654         return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family);
 655 }
 656
 657 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
 658
 659 static int
 660 pfkey_sockaddr_size(sa_family_t family)
 661 {
 662         return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
 663 }
 664
 665 static inline int pfkey_mode_from_xfrm(int mode)
 666 {
 667         switch(mode) {
 668         case XFRM_MODE_TRANSPORT:
 669                 return IPSEC_MODE_TRANSPORT;
 670         case XFRM_MODE_TUNNEL:
 671                 return IPSEC_MODE_TUNNEL;
 672         case XFRM_MODE_BEET:
 673                 return IPSEC_MODE_BEET;
 674         default:
 675                 return -1;
 676         }
 677 }
 678
 679 static inline int pfkey_mode_to_xfrm(int mode)
 680 {
 681         switch(mode) {
 682         case IPSEC_MODE_ANY:    /*XXX*/
 683         case IPSEC_MODE_TRANSPORT:
 684                 return XFRM_MODE_TRANSPORT;
 685         case IPSEC_MODE_TUNNEL:
 686                 return XFRM_MODE_TUNNEL;
 687         case IPSEC_MODE_BEET:
 688                 return XFRM_MODE_BEET;
 689         default:
 690                 return -1;
 691         }
 692 }
 693
 694 static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port,
 695                                         struct sockaddr *sa,
 696                                         unsigned short family)
 697 {
 698         switch (family) {
 699         case AF_INET:
 700             {
 701                 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 702                 sin->sin_family = AF_INET;
 703                 sin->sin_port = port;
 704                 sin->sin_addr.s_addr = xaddr->a4;
 705                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
 706                 return 32;
 707             }
 708 #if IS_ENABLED(CONFIG_IPV6)
 709         case AF_INET6:
 710             {
 711                 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 712                 sin6->sin6_family = AF_INET6;
 713                 sin6->sin6_port = port;
 714                 sin6->sin6_flowinfo = 0;
 715                 sin6->sin6_addr = *(struct in6_addr *)xaddr->a6;
 716                 sin6->sin6_scope_id = 0;
 717                 return 128;
 718             }
 719 #endif
 720         }
 721         return 0;
 722 }
 723
 724 static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x,
 725                                               int add_keys, int hsc)
 726 {
 727         struct sk_buff *skb;
 728         struct sadb_msg *hdr;
 729         struct sadb_sa *sa;
 730         struct sadb_lifetime *lifetime;
 731         struct sadb_address *addr;
 732         struct sadb_key *key;
 733         struct sadb_x_sa2 *sa2;
 734         struct sadb_x_sec_ctx *sec_ctx;
 735         struct xfrm_sec_ctx *xfrm_ctx;
 736         int ctx_size = 0;
 737         int size;
 738         int auth_key_size = 0;
 739         int encrypt_key_size = 0;
 740         int sockaddr_size;
 741         struct xfrm_encap_tmpl *natt = NULL;
 742         int mode;
 743
 744         /* address family check */
 745         sockaddr_size = pfkey_sockaddr_size(x->props.family);
 746         if (!sockaddr_size)
 747                 return ERR_PTR(-EINVAL);
 748
 749         /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
 750            key(AE), (identity(SD),) (sensitivity)> */
 751         size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
 752                 sizeof(struct sadb_lifetime) +
 753                 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
 754                 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
 755                         sizeof(struct sadb_address)*2 +
 756                                 sockaddr_size*2 +
 757                                         sizeof(struct sadb_x_sa2);
 758
 759         if ((xfrm_ctx = x->security)) {
 760                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
 761                 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
 762         }
 763
 764         /* identity & sensitivity */
 765         if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family))
 766                 size += sizeof(struct sadb_address) + sockaddr_size;
 767
 768         if (add_keys) {
 769                 if (x->aalg && x->aalg->alg_key_len) {
 770                         auth_key_size =
 771                                 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
 772                         size += sizeof(struct sadb_key) + auth_key_size;
 773                 }
 774                 if (x->ealg && x->ealg->alg_key_len) {
 775                         encrypt_key_size =
 776                                 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
 777                         size += sizeof(struct sadb_key) + encrypt_key_size;
 778                 }
 779         }
 780         if (x->encap)
 781                 natt = x->encap;
 782
 783         if (natt && natt->encap_type) {
 784                 size += sizeof(struct sadb_x_nat_t_type);
 785                 size += sizeof(struct sadb_x_nat_t_port);
 786                 size += sizeof(struct sadb_x_nat_t_port);
 787         }
 788
 789         skb =  alloc_skb(size + 16, GFP_ATOMIC);
 790         if (skb == NULL)
 791                 return ERR_PTR(-ENOBUFS);
 792
 793         /* call should fill header later */
 794         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
 795         memset(hdr, 0, size);   /* XXX do we need this ? */
 796         hdr->sadb_msg_len = size / sizeof(uint64_t);
 797
 798         /* sa */
 799         sa = (struct sadb_sa *)  skb_put(skb, sizeof(struct sadb_sa));
 800         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
 801         sa->sadb_sa_exttype = SADB_EXT_SA;
 802         sa->sadb_sa_spi = x->id.spi;
 803         sa->sadb_sa_replay = x->props.replay_window;
 804         switch (x->km.state) {
 805         case XFRM_STATE_VALID:
 806                 sa->sadb_sa_state = x->km.dying ?
 807                         SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
 808                 break;
 809         case XFRM_STATE_ACQ:
 810                 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
 811                 break;
 812         default:
 813                 sa->sadb_sa_state = SADB_SASTATE_DEAD;
 814                 break;
 815         }
 816         sa->sadb_sa_auth = 0;
 817         if (x->aalg) {
 818                 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
 819                 sa->sadb_sa_auth = (a && a->pfkey_supported) ?
 820                                         a->desc.sadb_alg_id : 0;
 821         }
 822         sa->sadb_sa_encrypt = 0;
 823         BUG_ON(x->ealg && x->calg);
 824         if (x->ealg) {
 825                 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
 826                 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
 827                                         a->desc.sadb_alg_id : 0;
 828         }
 829         /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
 830         if (x->calg) {
 831                 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
 832                 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
 833                                         a->desc.sadb_alg_id : 0;
 834         }
 835
 836         sa->sadb_sa_flags = 0;
 837         if (x->props.flags & XFRM_STATE_NOECN)
 838                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
 839         if (x->props.flags & XFRM_STATE_DECAP_DSCP)
 840                 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
 841         if (x->props.flags & XFRM_STATE_NOPMTUDISC)
 842                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
 843
 844         /* hard time */
 845         if (hsc & 2) {
 846                 lifetime = (struct sadb_lifetime *)  skb_put(skb,
 847                                                              sizeof(struct sadb_lifetime));
 848                 lifetime->sadb_lifetime_len =
 849                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 850                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
 851                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.hard_packet_limit);
 852                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
 853                 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
 854                 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
 855         }
 856         /* soft time */
 857         if (hsc & 1) {
 858                 lifetime = (struct sadb_lifetime *)  skb_put(skb,
 859                                                              sizeof(struct sadb_lifetime));
 860                 lifetime->sadb_lifetime_len =
 861                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 862                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
 863                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.soft_packet_limit);
 864                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
 865                 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
 866                 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
 867         }
 868         /* current time */
 869         lifetime = (struct sadb_lifetime *)  skb_put(skb,
 870                                                      sizeof(struct sadb_lifetime));
 871         lifetime->sadb_lifetime_len =
 872                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 873         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
 874         lifetime->sadb_lifetime_allocations = x->curlft.packets;
 875         lifetime->sadb_lifetime_bytes = x->curlft.bytes;
 876         lifetime->sadb_lifetime_addtime = x->curlft.add_time;
 877         lifetime->sadb_lifetime_usetime = x->curlft.use_time;
 878         /* src address */
 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_SRC;
 885         /* "if the ports are non-zero, then the sadb_address_proto field,
 886            normally zero, MUST be filled in with the transport
 887            protocol's number." - RFC2367 */
 888         addr->sadb_address_proto = 0;
 889         addr->sadb_address_reserved = 0;
 890
 891         addr->sadb_address_prefixlen =
 892                 pfkey_sockaddr_fill(&x->props.saddr, 0,
 893                                     (struct sockaddr *) (addr + 1),
 894                                     x->props.family);
 895         if (!addr->sadb_address_prefixlen)
 896                 BUG();
 897
 898         /* dst address */
 899         addr = (struct sadb_address*) skb_put(skb,
 900                                               sizeof(struct sadb_address)+sockaddr_size);
 901         addr->sadb_address_len =
 902                 (sizeof(struct sadb_address)+sockaddr_size)/
 903                         sizeof(uint64_t);
 904         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
 905         addr->sadb_address_proto = 0;
 906         addr->sadb_address_reserved = 0;
 907
 908         addr->sadb_address_prefixlen =
 909                 pfkey_sockaddr_fill(&x->id.daddr, 0,
 910                                     (struct sockaddr *) (addr + 1),
 911                                     x->props.family);
 912         if (!addr->sadb_address_prefixlen)
 913                 BUG();
 914
 915         if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr,
 916                              x->props.family)) {
 917                 addr = (struct sadb_address*) skb_put(skb,
 918                         sizeof(struct sadb_address)+sockaddr_size);
 919                 addr->sadb_address_len =
 920                         (sizeof(struct sadb_address)+sockaddr_size)/
 921                         sizeof(uint64_t);
 922                 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
 923                 addr->sadb_address_proto =
 924                         pfkey_proto_from_xfrm(x->sel.proto);
 925                 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
 926                 addr->sadb_address_reserved = 0;
 927
 928                 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
 929                                     (struct sockaddr *) (addr + 1),
 930                                     x->props.family);
 931         }
 932
 933         /* auth key */
 934         if (add_keys && auth_key_size) {
 935                 key = (struct sadb_key *) skb_put(skb,
 936                                                   sizeof(struct sadb_key)+auth_key_size);
 937                 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
 938                         sizeof(uint64_t);
 939                 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
 940                 key->sadb_key_bits = x->aalg->alg_key_len;
 941                 key->sadb_key_reserved = 0;
 942                 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
 943         }
 944         /* encrypt key */
 945         if (add_keys && encrypt_key_size) {
 946                 key = (struct sadb_key *) skb_put(skb,
 947                                                   sizeof(struct sadb_key)+encrypt_key_size);
 948                 key->sadb_key_len = (sizeof(struct sadb_key) +
 949                                      encrypt_key_size) / sizeof(uint64_t);
 950                 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
 951                 key->sadb_key_bits = x->ealg->alg_key_len;
 952                 key->sadb_key_reserved = 0;
 953                 memcpy(key + 1, x->ealg->alg_key,
 954                        (x->ealg->alg_key_len+7)/8);
 955         }
 956
 957         /* sa */
 958         sa2 = (struct sadb_x_sa2 *)  skb_put(skb, sizeof(struct sadb_x_sa2));
 959         sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
 960         sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
 961         if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
 962                 kfree_skb(skb);
 963                 return ERR_PTR(-EINVAL);
 964         }
 965         sa2->sadb_x_sa2_mode = mode;
 966         sa2->sadb_x_sa2_reserved1 = 0;
 967         sa2->sadb_x_sa2_reserved2 = 0;
 968         sa2->sadb_x_sa2_sequence = 0;
 969         sa2->sadb_x_sa2_reqid = x->props.reqid;
 970
 971         if (natt && natt->encap_type) {
 972                 struct sadb_x_nat_t_type *n_type;
 973                 struct sadb_x_nat_t_port *n_port;
 974
 975                 /* type */
 976                 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
 977                 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
 978                 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
 979                 n_type->sadb_x_nat_t_type_type = natt->encap_type;
 980                 n_type->sadb_x_nat_t_type_reserved[0] = 0;
 981                 n_type->sadb_x_nat_t_type_reserved[1] = 0;
 982                 n_type->sadb_x_nat_t_type_reserved[2] = 0;
 983
 984                 /* source port */
 985                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
 986                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
 987                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
 988                 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
 989                 n_port->sadb_x_nat_t_port_reserved = 0;
 990
 991                 /* dest port */
 992                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
 993                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
 994                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
 995                 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
 996                 n_port->sadb_x_nat_t_port_reserved = 0;
 997         }
 998
 999         /* security context */
1000         if (xfrm_ctx) {
1001                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
1002                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1003                 sec_ctx->sadb_x_sec_len =
1004                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1005                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1006                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1007                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1008                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1009                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1010                        xfrm_ctx->ctx_len);
1011         }
1012
1013         return skb;
1014 }
1015
1016
1017 static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x)
1018 {
1019         struct sk_buff *skb;
1020
1021         skb = __pfkey_xfrm_state2msg(x, 1, 3);
1022
1023         return skb;
1024 }
1025
1026 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x,
1027                                                           int hsc)
1028 {
1029         return __pfkey_xfrm_state2msg(x, 0, hsc);
1030 }
1031
1032 static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
1033                                                 const struct sadb_msg *hdr,
1034                                                 void * const *ext_hdrs)
1035 {
1036         struct xfrm_state *x;
1037         const struct sadb_lifetime *lifetime;
1038         const struct sadb_sa *sa;
1039         const struct sadb_key *key;
1040         const struct sadb_x_sec_ctx *sec_ctx;
1041         uint16_t proto;
1042         int err;
1043
1044
1045         sa = ext_hdrs[SADB_EXT_SA - 1];
1046         if (!sa ||
1047             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1048                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1049                 return ERR_PTR(-EINVAL);
1050         if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1051             !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1052                 return ERR_PTR(-EINVAL);
1053         if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1054             !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1055                 return ERR_PTR(-EINVAL);
1056         if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1057             !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1058                 return ERR_PTR(-EINVAL);
1059
1060         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1061         if (proto == 0)
1062                 return ERR_PTR(-EINVAL);
1063
1064         /* default error is no buffer space */
1065         err = -ENOBUFS;
1066
1067         /* RFC2367:
1068
1069    Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1070    SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1071    sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1072    Therefore, the sadb_sa_state field of all submitted SAs MUST be
1073    SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1074    not true.
1075
1076            However, KAME setkey always uses SADB_SASTATE_LARVAL.
1077            Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1078          */
1079         if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1080             (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1081              sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1082             sa->sadb_sa_encrypt > SADB_EALG_MAX)
1083                 return ERR_PTR(-EINVAL);
1084         key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1085         if (key != NULL &&
1086             sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1087             ((key->sadb_key_bits+7) / 8 == 0 ||
1088              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1089                 return ERR_PTR(-EINVAL);
1090         key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1091         if (key != NULL &&
1092             sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1093             ((key->sadb_key_bits+7) / 8 == 0 ||
1094              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1095                 return ERR_PTR(-EINVAL);
1096
1097         x = xfrm_state_alloc(net);
1098         if (x == NULL)
1099                 return ERR_PTR(-ENOBUFS);
1100
1101         x->id.proto = proto;
1102         x->id.spi = sa->sadb_sa_spi;
1103         x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay,
1104                                         (sizeof(x->replay.bitmap) * 8));
1105         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1106                 x->props.flags |= XFRM_STATE_NOECN;
1107         if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1108                 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1109         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1110                 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1111
1112         lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1];
1113         if (lifetime != NULL) {
1114                 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1115                 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1116                 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1117                 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1118         }
1119         lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1];
1120         if (lifetime != NULL) {
1121                 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1122                 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1123                 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1124                 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1125         }
1126
1127         sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
1128         if (sec_ctx != NULL) {
1129                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
1130
1131                 if (!uctx)
1132                         goto out;
1133
1134                 err = security_xfrm_state_alloc(x, uctx);
1135                 kfree(uctx);
1136
1137                 if (err)
1138                         goto out;
1139         }
1140
1141         key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1142         if (sa->sadb_sa_auth) {
1143                 int keysize = 0;
1144                 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1145                 if (!a || !a->pfkey_supported) {
1146                         err = -ENOSYS;
1147                         goto out;
1148                 }
1149                 if (key)
1150                         keysize = (key->sadb_key_bits + 7) / 8;
1151                 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1152                 if (!x->aalg)
1153                         goto out;
1154                 strcpy(x->aalg->alg_name, a->name);
1155                 x->aalg->alg_key_len = 0;
1156                 if (key) {
1157                         x->aalg->alg_key_len = key->sadb_key_bits;
1158                         memcpy(x->aalg->alg_key, key+1, keysize);
1159                 }
1160                 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1161                 x->props.aalgo = sa->sadb_sa_auth;
1162                 /* x->algo.flags = sa->sadb_sa_flags; */
1163         }
1164         if (sa->sadb_sa_encrypt) {
1165                 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1166                         struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1167                         if (!a || !a->pfkey_supported) {
1168                                 err = -ENOSYS;
1169                                 goto out;
1170                         }
1171                         x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1172                         if (!x->calg)
1173                                 goto out;
1174                         strcpy(x->calg->alg_name, a->name);
1175                         x->props.calgo = sa->sadb_sa_encrypt;
1176                 } else {
1177                         int keysize = 0;
1178                         struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1179                         if (!a || !a->pfkey_supported) {
1180                                 err = -ENOSYS;
1181                                 goto out;
1182                         }
1183                         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1184                         if (key)
1185                                 keysize = (key->sadb_key_bits + 7) / 8;
1186                         x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1187                         if (!x->ealg)
1188                                 goto out;
1189                         strcpy(x->ealg->alg_name, a->name);
1190                         x->ealg->alg_key_len = 0;
1191                         if (key) {
1192                                 x->ealg->alg_key_len = key->sadb_key_bits;
1193                                 memcpy(x->ealg->alg_key, key+1, keysize);
1194                         }
1195                         x->props.ealgo = sa->sadb_sa_encrypt;
1196                 }
1197         }
1198         /* x->algo.flags = sa->sadb_sa_flags; */
1199
1200         x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1201                                                     &x->props.saddr);
1202         pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1203                                   &x->id.daddr);
1204
1205         if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1206                 const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
1207                 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1208                 if (mode < 0) {
1209                         err = -EINVAL;
1210                         goto out;
1211                 }
1212                 x->props.mode = mode;
1213                 x->props.reqid = sa2->sadb_x_sa2_reqid;
1214         }
1215
1216         if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1217                 const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1218
1219                 /* Nobody uses this, but we try. */
1220                 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1221                 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1222         }
1223
1224         if (!x->sel.family)
1225                 x->sel.family = x->props.family;
1226
1227         if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1228                 const struct sadb_x_nat_t_type* n_type;
1229                 struct xfrm_encap_tmpl *natt;
1230
1231                 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1232                 if (!x->encap)
1233                         goto out;
1234
1235                 natt = x->encap;
1236                 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1237                 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1238
1239                 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1240                         const struct sadb_x_nat_t_port *n_port =
1241                                 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1242                         natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1243                 }
1244                 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1245                         const struct sadb_x_nat_t_port *n_port =
1246                                 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1247                         natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1248                 }
1249                 memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
1250         }
1251
1252         err = xfrm_init_state(x);
1253         if (err)
1254                 goto out;
1255
1256         x->km.seq = hdr->sadb_msg_seq;
1257         return x;
1258
1259 out:
1260         x->km.state = XFRM_STATE_DEAD;
1261         xfrm_state_put(x);
1262         return ERR_PTR(err);
1263 }
1264
1265 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1266 {
1267         return -EOPNOTSUPP;
1268 }
1269
1270 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1271 {
1272         struct net *net = sock_net(sk);
1273         struct sk_buff *resp_skb;
1274         struct sadb_x_sa2 *sa2;
1275         struct sadb_address *saddr, *daddr;
1276         struct sadb_msg *out_hdr;
1277         struct sadb_spirange *range;
1278         struct xfrm_state *x = NULL;
1279         int mode;
1280         int err;
1281         u32 min_spi, max_spi;
1282         u32 reqid;
1283         u8 proto;
1284         unsigned short family;
1285         xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1286
1287         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1288                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1289                 return -EINVAL;
1290
1291         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1292         if (proto == 0)
1293                 return -EINVAL;
1294
1295         if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1296                 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1297                 if (mode < 0)
1298                         return -EINVAL;
1299                 reqid = sa2->sadb_x_sa2_reqid;
1300         } else {
1301                 mode = 0;
1302                 reqid = 0;
1303         }
1304
1305         saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1306         daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1307
1308         family = ((struct sockaddr *)(saddr + 1))->sa_family;
1309         switch (family) {
1310         case AF_INET:
1311                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1312                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1313                 break;
1314 #if IS_ENABLED(CONFIG_IPV6)
1315         case AF_INET6:
1316                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1317                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1318                 break;
1319 #endif
1320         }
1321
1322         if (hdr->sadb_msg_seq) {
1323                 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1324                 if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) {
1325                         xfrm_state_put(x);
1326                         x = NULL;
1327                 }
1328         }
1329
1330         if (!x)
1331                 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family);
1332
1333         if (x == NULL)
1334                 return -ENOENT;
1335
1336         min_spi = 0x100;
1337         max_spi = 0x0fffffff;
1338
1339         range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1340         if (range) {
1341                 min_spi = range->sadb_spirange_min;
1342                 max_spi = range->sadb_spirange_max;
1343         }
1344
1345         err = verify_spi_info(x->id.proto, min_spi, max_spi);
1346         if (err) {
1347                 xfrm_state_put(x);
1348                 return err;
1349         }
1350
1351         err = xfrm_alloc_spi(x, min_spi, max_spi);
1352         resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1353
1354         if (IS_ERR(resp_skb)) {
1355                 xfrm_state_put(x);
1356                 return  PTR_ERR(resp_skb);
1357         }
1358
1359         out_hdr = (struct sadb_msg *) resp_skb->data;
1360         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1361         out_hdr->sadb_msg_type = SADB_GETSPI;
1362         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1363         out_hdr->sadb_msg_errno = 0;
1364         out_hdr->sadb_msg_reserved = 0;
1365         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1366         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1367
1368         xfrm_state_put(x);
1369
1370         pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
1371
1372         return 0;
1373 }
1374
1375 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1376 {
1377         struct net *net = sock_net(sk);
1378         struct xfrm_state *x;
1379
1380         if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1381                 return -EOPNOTSUPP;
1382
1383         if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1384                 return 0;
1385
1386         x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1387         if (x == NULL)
1388                 return 0;
1389
1390         spin_lock_bh(&x->lock);
1391         if (x->km.state == XFRM_STATE_ACQ)
1392                 x->km.state = XFRM_STATE_ERROR;
1393
1394         spin_unlock_bh(&x->lock);
1395         xfrm_state_put(x);
1396         return 0;
1397 }
1398
1399 static inline int event2poltype(int event)
1400 {
1401         switch (event) {
1402         case XFRM_MSG_DELPOLICY:
1403                 return SADB_X_SPDDELETE;
1404         case XFRM_MSG_NEWPOLICY:
1405                 return SADB_X_SPDADD;
1406         case XFRM_MSG_UPDPOLICY:
1407                 return SADB_X_SPDUPDATE;
1408         case XFRM_MSG_POLEXPIRE:
1409         //      return SADB_X_SPDEXPIRE;
1410         default:
1411                 pr_err("pfkey: Unknown policy event %d\n", event);
1412                 break;
1413         }
1414
1415         return 0;
1416 }
1417
1418 static inline int event2keytype(int event)
1419 {
1420         switch (event) {
1421         case XFRM_MSG_DELSA:
1422                 return SADB_DELETE;
1423         case XFRM_MSG_NEWSA:
1424                 return SADB_ADD;
1425         case XFRM_MSG_UPDSA:
1426                 return SADB_UPDATE;
1427         case XFRM_MSG_EXPIRE:
1428                 return SADB_EXPIRE;
1429         default:
1430                 pr_err("pfkey: Unknown SA event %d\n", event);
1431                 break;
1432         }
1433
1434         return 0;
1435 }
1436
1437 /* ADD/UPD/DEL */
1438 static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
1439 {
1440         struct sk_buff *skb;
1441         struct sadb_msg *hdr;
1442
1443         skb = pfkey_xfrm_state2msg(x);
1444
1445         if (IS_ERR(skb))
1446                 return PTR_ERR(skb);
1447
1448         hdr = (struct sadb_msg *) skb->data;
1449         hdr->sadb_msg_version = PF_KEY_V2;
1450         hdr->sadb_msg_type = event2keytype(c->event);
1451         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1452         hdr->sadb_msg_errno = 0;
1453         hdr->sadb_msg_reserved = 0;
1454         hdr->sadb_msg_seq = c->seq;
1455         hdr->sadb_msg_pid = c->portid;
1456
1457         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
1458
1459         return 0;
1460 }
1461
1462 static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1463 {
1464         struct net *net = sock_net(sk);
1465         struct xfrm_state *x;
1466         int err;
1467         struct km_event c;
1468
1469         x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1470         if (IS_ERR(x))
1471                 return PTR_ERR(x);
1472
1473         xfrm_state_hold(x);
1474         if (hdr->sadb_msg_type == SADB_ADD)
1475                 err = xfrm_state_add(x);
1476         else
1477                 err = xfrm_state_update(x);
1478
1479         xfrm_audit_state_add(x, err ? 0 : 1,
1480                              audit_get_loginuid(current),
1481                              audit_get_sessionid(current), 0);
1482
1483         if (err < 0) {
1484                 x->km.state = XFRM_STATE_DEAD;
1485                 __xfrm_state_put(x);
1486                 goto out;
1487         }
1488
1489         if (hdr->sadb_msg_type == SADB_ADD)
1490                 c.event = XFRM_MSG_NEWSA;
1491         else
1492                 c.event = XFRM_MSG_UPDSA;
1493         c.seq = hdr->sadb_msg_seq;
1494         c.portid = hdr->sadb_msg_pid;
1495         km_state_notify(x, &c);
1496 out:
1497         xfrm_state_put(x);
1498         return err;
1499 }
1500
1501 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1502 {
1503         struct net *net = sock_net(sk);
1504         struct xfrm_state *x;
1505         struct km_event c;
1506         int err;
1507
1508         if (!ext_hdrs[SADB_EXT_SA-1] ||
1509             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1510                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1511                 return -EINVAL;
1512
1513         x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1514         if (x == NULL)
1515                 return -ESRCH;
1516
1517         if ((err = security_xfrm_state_delete(x)))
1518                 goto out;
1519
1520         if (xfrm_state_kern(x)) {
1521                 err = -EPERM;
1522                 goto out;
1523         }
1524
1525         err = xfrm_state_delete(x);
1526
1527         if (err < 0)
1528                 goto out;
1529
1530         c.seq = hdr->sadb_msg_seq;
1531         c.portid = hdr->sadb_msg_pid;
1532         c.event = XFRM_MSG_DELSA;
1533         km_state_notify(x, &c);
1534 out:
1535         xfrm_audit_state_delete(x, err ? 0 : 1,
1536                                 audit_get_loginuid(current),
1537                                 audit_get_sessionid(current), 0);
1538         xfrm_state_put(x);
1539
1540         return err;
1541 }
1542
1543 static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1544 {
1545         struct net *net = sock_net(sk);
1546         __u8 proto;
1547         struct sk_buff *out_skb;
1548         struct sadb_msg *out_hdr;
1549         struct xfrm_state *x;
1550
1551         if (!ext_hdrs[SADB_EXT_SA-1] ||
1552             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1553                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1554                 return -EINVAL;
1555
1556         x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1557         if (x == NULL)
1558                 return -ESRCH;
1559
1560         out_skb = pfkey_xfrm_state2msg(x);
1561         proto = x->id.proto;
1562         xfrm_state_put(x);
1563         if (IS_ERR(out_skb))
1564                 return  PTR_ERR(out_skb);
1565
1566         out_hdr = (struct sadb_msg *) out_skb->data;
1567         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1568         out_hdr->sadb_msg_type = SADB_GET;
1569         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1570         out_hdr->sadb_msg_errno = 0;
1571         out_hdr->sadb_msg_reserved = 0;
1572         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1573         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1574         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1575
1576         return 0;
1577 }
1578
1579 static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
1580                                               gfp_t allocation)
1581 {
1582         struct sk_buff *skb;
1583         struct sadb_msg *hdr;
1584         int len, auth_len, enc_len, i;
1585
1586         auth_len = xfrm_count_pfkey_auth_supported();
1587         if (auth_len) {
1588                 auth_len *= sizeof(struct sadb_alg);
1589                 auth_len += sizeof(struct sadb_supported);
1590         }
1591
1592         enc_len = xfrm_count_pfkey_enc_supported();
1593         if (enc_len) {
1594                 enc_len *= sizeof(struct sadb_alg);
1595                 enc_len += sizeof(struct sadb_supported);
1596         }
1597
1598         len = enc_len + auth_len + sizeof(struct sadb_msg);
1599
1600         skb = alloc_skb(len + 16, allocation);
1601         if (!skb)
1602                 goto out_put_algs;
1603
1604         hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1605         pfkey_hdr_dup(hdr, orig);
1606         hdr->sadb_msg_errno = 0;
1607         hdr->sadb_msg_len = len / sizeof(uint64_t);
1608
1609         if (auth_len) {
1610                 struct sadb_supported *sp;
1611                 struct sadb_alg *ap;
1612
1613                 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1614                 ap = (struct sadb_alg *) (sp + 1);
1615
1616                 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1617                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1618
1619                 for (i = 0; ; i++) {
1620                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1621                         if (!aalg)
1622                                 break;
1623                         if (!aalg->pfkey_supported)
1624                                 continue;
1625                         if (aalg->available)
1626                                 *ap++ = aalg->desc;
1627                 }
1628         }
1629
1630         if (enc_len) {
1631                 struct sadb_supported *sp;
1632                 struct sadb_alg *ap;
1633
1634                 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1635                 ap = (struct sadb_alg *) (sp + 1);
1636
1637                 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1638                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1639
1640                 for (i = 0; ; i++) {
1641                         struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1642                         if (!ealg)
1643                                 break;
1644                         if (!ealg->pfkey_supported)
1645                                 continue;
1646                         if (ealg->available)
1647                                 *ap++ = ealg->desc;
1648                 }
1649         }
1650
1651 out_put_algs:
1652         return skb;
1653 }
1654
1655 static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1656 {
1657         struct pfkey_sock *pfk = pfkey_sk(sk);
1658         struct sk_buff *supp_skb;
1659
1660         if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1661                 return -EINVAL;
1662
1663         if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1664                 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1665                         return -EEXIST;
1666                 pfk->registered |= (1<<hdr->sadb_msg_satype);
1667         }
1668
1669         xfrm_probe_algs();
1670
1671         supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1672         if (!supp_skb) {
1673                 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1674                         pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1675
1676                 return -ENOBUFS;
1677         }
1678
1679         pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, sock_net(sk));
1680
1681         return 0;
1682 }
1683
1684 static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
1685 {
1686         struct sk_buff *skb;
1687         struct sadb_msg *hdr;
1688
1689         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1690         if (!skb)
1691                 return -ENOBUFS;
1692
1693         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1694         memcpy(hdr, ihdr, sizeof(struct sadb_msg));
1695         hdr->sadb_msg_errno = (uint8_t) 0;
1696         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1697
1698         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1699 }
1700
1701 static int key_notify_sa_flush(const struct km_event *c)
1702 {
1703         struct sk_buff *skb;
1704         struct sadb_msg *hdr;
1705
1706         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1707         if (!skb)
1708                 return -ENOBUFS;
1709         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1710         hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1711         hdr->sadb_msg_type = SADB_FLUSH;
1712         hdr->sadb_msg_seq = c->seq;
1713         hdr->sadb_msg_pid = c->portid;
1714         hdr->sadb_msg_version = PF_KEY_V2;
1715         hdr->sadb_msg_errno = (uint8_t) 0;
1716         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1717         hdr->sadb_msg_reserved = 0;
1718
1719         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
1720
1721         return 0;
1722 }
1723
1724 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1725 {
1726         struct net *net = sock_net(sk);
1727         unsigned int proto;
1728         struct km_event c;
1729         struct xfrm_audit audit_info;
1730         int err, err2;
1731
1732         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1733         if (proto == 0)
1734                 return -EINVAL;
1735
1736         audit_info.loginuid = audit_get_loginuid(current);
1737         audit_info.sessionid = audit_get_sessionid(current);
1738         audit_info.secid = 0;
1739         err = xfrm_state_flush(net, proto, &audit_info);
1740         err2 = unicast_flush_resp(sk, hdr);
1741         if (err || err2) {
1742                 if (err == -ESRCH) /* empty table - go quietly */
1743                         err = 0;
1744                 return err ? err : err2;
1745         }
1746
1747         c.data.proto = proto;
1748         c.seq = hdr->sadb_msg_seq;
1749         c.portid = hdr->sadb_msg_pid;
1750         c.event = XFRM_MSG_FLUSHSA;
1751         c.net = net;
1752         km_state_notify(NULL, &c);
1753
1754         return 0;
1755 }
1756
1757 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1758 {
1759         struct pfkey_sock *pfk = ptr;
1760         struct sk_buff *out_skb;
1761         struct sadb_msg *out_hdr;
1762
1763         if (!pfkey_can_dump(&pfk->sk))
1764                 return -ENOBUFS;
1765
1766         out_skb = pfkey_xfrm_state2msg(x);
1767         if (IS_ERR(out_skb))
1768                 return PTR_ERR(out_skb);
1769
1770         out_hdr = (struct sadb_msg *) out_skb->data;
1771         out_hdr->sadb_msg_version = pfk->dump.msg_version;
1772         out_hdr->sadb_msg_type = SADB_DUMP;
1773         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1774         out_hdr->sadb_msg_errno = 0;
1775         out_hdr->sadb_msg_reserved = 0;
1776         out_hdr->sadb_msg_seq = count + 1;
1777         out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
1778
1779         if (pfk->dump.skb)
1780                 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
1781                                 &pfk->sk, sock_net(&pfk->sk));
1782         pfk->dump.skb = out_skb;
1783
1784         return 0;
1785 }
1786
1787 static int pfkey_dump_sa(struct pfkey_sock *pfk)
1788 {
1789         struct net *net = sock_net(&pfk->sk);
1790         return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1791 }
1792
1793 static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1794 {
1795         struct net *net = sock_net(&pfk->sk);
1796
1797         xfrm_state_walk_done(&pfk->dump.u.state, net);
1798 }
1799
1800 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1801 {
1802         u8 proto;
1803         struct xfrm_address_filter *filter = NULL;
1804         struct pfkey_sock *pfk = pfkey_sk(sk);
1805
1806         if (pfk->dump.dump != NULL)
1807                 return -EBUSY;
1808
1809         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1810         if (proto == 0)
1811                 return -EINVAL;
1812
1813         if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
1814                 struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
1815
1816                 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
1817                 if (filter == NULL)
1818                         return -ENOMEM;
1819
1820                 memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr,
1821                        sizeof(xfrm_address_t));
1822                 memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr,
1823                        sizeof(xfrm_address_t));
1824                 filter->family = xfilter->sadb_x_filter_family;
1825                 filter->splen = xfilter->sadb_x_filter_splen;
1826                 filter->dplen = xfilter->sadb_x_filter_dplen;
1827         }
1828
1829         pfk->dump.msg_version = hdr->sadb_msg_version;
1830         pfk->dump.msg_portid = hdr->sadb_msg_pid;
1831         pfk->dump.dump = pfkey_dump_sa;
1832         pfk->dump.done = pfkey_dump_sa_done;
1833         xfrm_state_walk_init(&pfk->dump.u.state, proto, filter);
1834
1835         return pfkey_do_dump(pfk);
1836 }
1837
1838 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1839 {
1840         struct pfkey_sock *pfk = pfkey_sk(sk);
1841         int satype = hdr->sadb_msg_satype;
1842         bool reset_errno = false;
1843
1844         if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1845                 reset_errno = true;
1846                 if (satype != 0 && satype != 1)
1847                         return -EINVAL;
1848                 pfk->promisc = satype;
1849         }
1850         if (reset_errno && skb_cloned(skb))
1851                 skb = skb_copy(skb, GFP_KERNEL);
1852         else
1853                 skb = skb_clone(skb, GFP_KERNEL);
1854
1855         if (reset_errno && skb) {
1856                 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1857                 new_hdr->sadb_msg_errno = 0;
1858         }
1859
1860         pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
1861         return 0;
1862 }
1863
1864 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1865 {
1866         int i;
1867         u32 reqid = *(u32*)ptr;
1868
1869         for (i=0; i<xp->xfrm_nr; i++) {
1870                 if (xp->xfrm_vec[i].reqid == reqid)
1871                         return -EEXIST;
1872         }
1873         return 0;
1874 }
1875
1876 static u32 gen_reqid(struct net *net)
1877 {
1878         struct xfrm_policy_walk walk;
1879         u32 start;
1880         int rc;
1881         static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1882
1883         start = reqid;
1884         do {
1885                 ++reqid;
1886                 if (reqid == 0)
1887                         reqid = IPSEC_MANUAL_REQID_MAX+1;
1888                 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1889                 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1890                 xfrm_policy_walk_done(&walk, net);
1891                 if (rc != -EEXIST)
1892                         return reqid;
1893         } while (reqid != start);
1894         return 0;
1895 }
1896
1897 static int
1898 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1899 {
1900         struct net *net = xp_net(xp);
1901         struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1902         int mode;
1903
1904         if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1905                 return -ELOOP;
1906
1907         if (rq->sadb_x_ipsecrequest_mode == 0)
1908                 return -EINVAL;
1909
1910         t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1911         if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1912                 return -EINVAL;
1913         t->mode = mode;
1914         if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1915                 t->optional = 1;
1916         else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1917                 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1918                 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1919                         t->reqid = 0;
1920                 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1921                         return -ENOBUFS;
1922         }
1923
1924         /* addresses present only in tunnel mode */
1925         if (t->mode == XFRM_MODE_TUNNEL) {
1926                 u8 *sa = (u8 *) (rq + 1);
1927                 int family, socklen;
1928
1929                 family = pfkey_sockaddr_extract((struct sockaddr *)sa,
1930                                                 &t->saddr);
1931                 if (!family)
1932                         return -EINVAL;
1933
1934                 socklen = pfkey_sockaddr_len(family);
1935                 if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen),
1936                                            &t->id.daddr) != family)
1937                         return -EINVAL;
1938                 t->encap_family = family;
1939         } else
1940                 t->encap_family = xp->family;
1941
1942         /* No way to set this via kame pfkey */
1943         t->allalgs = 1;
1944         xp->xfrm_nr++;
1945         return 0;
1946 }
1947
1948 static int
1949 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1950 {
1951         int err;
1952         int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1953         struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1954
1955         if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
1956                 return -EINVAL;
1957
1958         while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1959                 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1960                         return err;
1961                 len -= rq->sadb_x_ipsecrequest_len;
1962                 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1963         }
1964         return 0;
1965 }
1966
1967 static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
1968 {
1969   struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1970
1971         if (xfrm_ctx) {
1972                 int len = sizeof(struct sadb_x_sec_ctx);
1973                 len += xfrm_ctx->ctx_len;
1974                 return PFKEY_ALIGN8(len);
1975         }
1976         return 0;
1977 }
1978
1979 static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
1980 {
1981         const struct xfrm_tmpl *t;
1982         int sockaddr_size = pfkey_sockaddr_size(xp->family);
1983         int socklen = 0;
1984         int i;
1985
1986         for (i=0; i<xp->xfrm_nr; i++) {
1987                 t = xp->xfrm_vec + i;
1988                 socklen += pfkey_sockaddr_len(t->encap_family);
1989         }
1990
1991         return sizeof(struct sadb_msg) +
1992                 (sizeof(struct sadb_lifetime) * 3) +
1993                 (sizeof(struct sadb_address) * 2) +
1994                 (sockaddr_size * 2) +
1995                 sizeof(struct sadb_x_policy) +
1996                 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1997                 (socklen * 2) +
1998                 pfkey_xfrm_policy2sec_ctx_size(xp);
1999 }
2000
2001 static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
2002 {
2003         struct sk_buff *skb;
2004         int size;
2005
2006         size = pfkey_xfrm_policy2msg_size(xp);
2007
2008         skb =  alloc_skb(size + 16, GFP_ATOMIC);
2009         if (skb == NULL)
2010                 return ERR_PTR(-ENOBUFS);
2011
2012         return skb;
2013 }
2014
2015 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
2016 {
2017         struct sadb_msg *hdr;
2018         struct sadb_address *addr;
2019         struct sadb_lifetime *lifetime;
2020         struct sadb_x_policy *pol;
2021         struct sadb_x_sec_ctx *sec_ctx;
2022         struct xfrm_sec_ctx *xfrm_ctx;
2023         int i;
2024         int size;
2025         int sockaddr_size = pfkey_sockaddr_size(xp->family);
2026         int socklen = pfkey_sockaddr_len(xp->family);
2027
2028         size = pfkey_xfrm_policy2msg_size(xp);
2029
2030         /* call should fill header later */
2031         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2032         memset(hdr, 0, size);   /* XXX do we need this ? */
2033
2034         /* src address */
2035         addr = (struct sadb_address*) skb_put(skb,
2036                                               sizeof(struct sadb_address)+sockaddr_size);
2037         addr->sadb_address_len =
2038                 (sizeof(struct sadb_address)+sockaddr_size)/
2039                         sizeof(uint64_t);
2040         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2041         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2042         addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2043         addr->sadb_address_reserved = 0;
2044         if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2045                                  xp->selector.sport,
2046                                  (struct sockaddr *) (addr + 1),
2047                                  xp->family))
2048                 BUG();
2049
2050         /* dst address */
2051         addr = (struct sadb_address*) skb_put(skb,
2052                                               sizeof(struct sadb_address)+sockaddr_size);
2053         addr->sadb_address_len =
2054                 (sizeof(struct sadb_address)+sockaddr_size)/
2055                         sizeof(uint64_t);
2056         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2057         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2058         addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2059         addr->sadb_address_reserved = 0;
2060
2061         pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2062                             (struct sockaddr *) (addr + 1),
2063                             xp->family);
2064
2065         /* hard time */
2066         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2067                                                      sizeof(struct sadb_lifetime));
2068         lifetime->sadb_lifetime_len =
2069                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2070         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2071         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.hard_packet_limit);
2072         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2073         lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2074         lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2075         /* soft time */
2076         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2077                                                      sizeof(struct sadb_lifetime));
2078         lifetime->sadb_lifetime_len =
2079                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2080         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2081         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.soft_packet_limit);
2082         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2083         lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2084         lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2085         /* current time */
2086         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2087                                                      sizeof(struct sadb_lifetime));
2088         lifetime->sadb_lifetime_len =
2089                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2090         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2091         lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2092         lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2093         lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2094         lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2095
2096         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
2097         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2098         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2099         pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2100         if (xp->action == XFRM_POLICY_ALLOW) {
2101                 if (xp->xfrm_nr)
2102                         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2103                 else
2104                         pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2105         }
2106         pol->sadb_x_policy_dir = dir+1;
2107         pol->sadb_x_policy_reserved = 0;
2108         pol->sadb_x_policy_id = xp->index;
2109         pol->sadb_x_policy_priority = xp->priority;
2110
2111         for (i=0; i<xp->xfrm_nr; i++) {
2112                 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
2113                 struct sadb_x_ipsecrequest *rq;
2114                 int req_size;
2115                 int mode;
2116
2117                 req_size = sizeof(struct sadb_x_ipsecrequest);
2118                 if (t->mode == XFRM_MODE_TUNNEL) {
2119                         socklen = pfkey_sockaddr_len(t->encap_family);
2120                         req_size += socklen * 2;
2121                 } else {
2122                         size -= 2*socklen;
2123                 }
2124                 rq = (void*)skb_put(skb, req_size);
2125                 pol->sadb_x_policy_len += req_size/8;
2126                 memset(rq, 0, sizeof(*rq));
2127                 rq->sadb_x_ipsecrequest_len = req_size;
2128                 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2129                 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2130                         return -EINVAL;
2131                 rq->sadb_x_ipsecrequest_mode = mode;
2132                 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2133                 if (t->reqid)
2134                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2135                 if (t->optional)
2136                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2137                 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2138
2139                 if (t->mode == XFRM_MODE_TUNNEL) {
2140                         u8 *sa = (void *)(rq + 1);
2141                         pfkey_sockaddr_fill(&t->saddr, 0,
2142                                             (struct sockaddr *)sa,
2143                                             t->encap_family);
2144                         pfkey_sockaddr_fill(&t->id.daddr, 0,
2145                                             (struct sockaddr *) (sa + socklen),
2146                                             t->encap_family);
2147                 }
2148         }
2149
2150         /* security context */
2151         if ((xfrm_ctx = xp->security)) {
2152                 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2153
2154                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2155                 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2156                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2157                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2158                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2159                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2160                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2161                        xfrm_ctx->ctx_len);
2162         }
2163
2164         hdr->sadb_msg_len = size / sizeof(uint64_t);
2165         hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2166
2167         return 0;
2168 }
2169
2170 static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2171 {
2172         struct sk_buff *out_skb;
2173         struct sadb_msg *out_hdr;
2174         int err;
2175
2176         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2177         if (IS_ERR(out_skb))
2178                 return PTR_ERR(out_skb);
2179
2180         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2181         if (err < 0)
2182                 return err;
2183
2184         out_hdr = (struct sadb_msg *) out_skb->data;
2185         out_hdr->sadb_msg_version = PF_KEY_V2;
2186
2187         if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2188                 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2189         else
2190                 out_hdr->sadb_msg_type = event2poltype(c->event);
2191         out_hdr->sadb_msg_errno = 0;
2192         out_hdr->sadb_msg_seq = c->seq;
2193         out_hdr->sadb_msg_pid = c->portid;
2194         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
2195         return 0;
2196
2197 }
2198
2199 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2200 {
2201         struct net *net = sock_net(sk);
2202         int err = 0;
2203         struct sadb_lifetime *lifetime;
2204         struct sadb_address *sa;
2205         struct sadb_x_policy *pol;
2206         struct xfrm_policy *xp;
2207         struct km_event c;
2208         struct sadb_x_sec_ctx *sec_ctx;
2209
2210         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2211                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2212             !ext_hdrs[SADB_X_EXT_POLICY-1])
2213                 return -EINVAL;
2214
2215         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2216         if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2217                 return -EINVAL;
2218         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2219                 return -EINVAL;
2220
2221         xp = xfrm_policy_alloc(net, GFP_KERNEL);
2222         if (xp == NULL)
2223                 return -ENOBUFS;
2224
2225         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2226                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2227         xp->priority = pol->sadb_x_policy_priority;
2228
2229         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2230         xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2231         xp->selector.family = xp->family;
2232         xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2233         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2234         xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2235         if (xp->selector.sport)
2236                 xp->selector.sport_mask = htons(0xffff);
2237
2238         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2239         pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2240         xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2241
2242         /* Amusing, we set this twice.  KAME apps appear to set same value
2243          * in both addresses.
2244          */
2245         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2246
2247         xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2248         if (xp->selector.dport)
2249                 xp->selector.dport_mask = htons(0xffff);
2250
2251         sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2252         if (sec_ctx != NULL) {
2253                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2254
2255                 if (!uctx) {
2256                         err = -ENOBUFS;
2257                         goto out;
2258                 }
2259
2260                 err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL);
2261                 kfree(uctx);
2262
2263                 if (err)
2264                         goto out;
2265         }
2266
2267         xp->lft.soft_byte_limit = XFRM_INF;
2268         xp->lft.hard_byte_limit = XFRM_INF;
2269         xp->lft.soft_packet_limit = XFRM_INF;
2270         xp->lft.hard_packet_limit = XFRM_INF;
2271         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2272                 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2273                 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2274                 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2275                 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2276         }
2277         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2278                 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2279                 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2280                 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2281                 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2282         }
2283         xp->xfrm_nr = 0;
2284         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2285             (err = parse_ipsecrequests(xp, pol)) < 0)
2286                 goto out;
2287
2288         err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2289                                  hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2290
2291         xfrm_audit_policy_add(xp, err ? 0 : 1,
2292                               audit_get_loginuid(current),
2293                               audit_get_sessionid(current), 0);
2294
2295         if (err)
2296                 goto out;
2297
2298         if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2299                 c.event = XFRM_MSG_UPDPOLICY;
2300         else
2301                 c.event = XFRM_MSG_NEWPOLICY;
2302
2303         c.seq = hdr->sadb_msg_seq;
2304         c.portid = hdr->sadb_msg_pid;
2305
2306         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2307         xfrm_pol_put(xp);
2308         return 0;
2309
2310 out:
2311         xp->walk.dead = 1;
2312         xfrm_policy_destroy(xp);
2313         return err;
2314 }
2315
2316 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2317 {
2318         struct net *net = sock_net(sk);
2319         int err;
2320         struct sadb_address *sa;
2321         struct sadb_x_policy *pol;
2322         struct xfrm_policy *xp;
2323         struct xfrm_selector sel;
2324         struct km_event c;
2325         struct sadb_x_sec_ctx *sec_ctx;
2326         struct xfrm_sec_ctx *pol_ctx = NULL;
2327
2328         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2329                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2330             !ext_hdrs[SADB_X_EXT_POLICY-1])
2331                 return -EINVAL;
2332
2333         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2334         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2335                 return -EINVAL;
2336
2337         memset(&sel, 0, sizeof(sel));
2338
2339         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2340         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2341         sel.prefixlen_s = sa->sadb_address_prefixlen;
2342         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2343         sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2344         if (sel.sport)
2345                 sel.sport_mask = htons(0xffff);
2346
2347         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2348         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2349         sel.prefixlen_d = sa->sadb_address_prefixlen;
2350         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2351         sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2352         if (sel.dport)
2353                 sel.dport_mask = htons(0xffff);
2354
2355         sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2356         if (sec_ctx != NULL) {
2357                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2358
2359                 if (!uctx)
2360                         return -ENOMEM;
2361
2362                 err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL);
2363                 kfree(uctx);
2364                 if (err)
2365                         return err;
2366         }
2367
2368         xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2369                                    pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2370                                    1, &err);
2371         security_xfrm_policy_free(pol_ctx);
2372         if (xp == NULL)
2373                 return -ENOENT;
2374
2375         xfrm_audit_policy_delete(xp, err ? 0 : 1,
2376                                  audit_get_loginuid(current),
2377                                  audit_get_sessionid(current), 0);
2378
2379         if (err)
2380                 goto out;
2381
2382         c.seq = hdr->sadb_msg_seq;
2383         c.portid = hdr->sadb_msg_pid;
2384         c.data.byid = 0;
2385         c.event = XFRM_MSG_DELPOLICY;
2386         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2387
2388 out:
2389         xfrm_pol_put(xp);
2390         if (err == 0)
2391                 xfrm_garbage_collect(net);
2392         return err;
2393 }
2394
2395 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
2396 {
2397         int err;
2398         struct sk_buff *out_skb;
2399         struct sadb_msg *out_hdr;
2400         err = 0;
2401
2402         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2403         if (IS_ERR(out_skb)) {
2404                 err =  PTR_ERR(out_skb);
2405                 goto out;
2406         }
2407         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2408         if (err < 0)
2409                 goto out;
2410
2411         out_hdr = (struct sadb_msg *) out_skb->data;
2412         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2413         out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2414         out_hdr->sadb_msg_satype = 0;
2415         out_hdr->sadb_msg_errno = 0;
2416         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2417         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2418         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
2419         err = 0;
2420
2421 out:
2422         return err;
2423 }
2424
2425 #ifdef CONFIG_NET_KEY_MIGRATE
2426 static int pfkey_sockaddr_pair_size(sa_family_t family)
2427 {
2428         return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2429 }
2430
2431 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2432                                xfrm_address_t *saddr, xfrm_address_t *daddr,
2433                                u16 *family)
2434 {
2435         int af, socklen;
2436
2437         if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2438                 return -EINVAL;
2439
2440         af = pfkey_sockaddr_extract(sa, saddr);
2441         if (!af)
2442                 return -EINVAL;
2443
2444         socklen = pfkey_sockaddr_len(af);
2445         if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2446                                    daddr) != af)
2447                 return -EINVAL;
2448
2449         *family = af;
2450         return 0;
2451 }
2452
2453 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2454                                     struct xfrm_migrate *m)
2455 {
2456         int err;
2457         struct sadb_x_ipsecrequest *rq2;
2458         int mode;
2459
2460         if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2461             len < rq1->sadb_x_ipsecrequest_len)
2462                 return -EINVAL;
2463
2464         /* old endoints */
2465         err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2466                                   rq1->sadb_x_ipsecrequest_len,
2467                                   &m->old_saddr, &m->old_daddr,
2468                                   &m->old_family);
2469         if (err)
2470                 return err;
2471
2472         rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2473         len -= rq1->sadb_x_ipsecrequest_len;
2474
2475         if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2476             len < rq2->sadb_x_ipsecrequest_len)
2477                 return -EINVAL;
2478
2479         /* new endpoints */
2480         err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2481                                   rq2->sadb_x_ipsecrequest_len,
2482                                   &m->new_saddr, &m->new_daddr,
2483                                   &m->new_family);
2484         if (err)
2485                 return err;
2486
2487         if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2488             rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2489             rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2490                 return -EINVAL;
2491
2492         m->proto = rq1->sadb_x_ipsecrequest_proto;
2493         if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2494                 return -EINVAL;
2495         m->mode = mode;
2496         m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2497
2498         return ((int)(rq1->sadb_x_ipsecrequest_len +
2499                       rq2->sadb_x_ipsecrequest_len));
2500 }
2501
2502 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2503                          const struct sadb_msg *hdr, void * const *ext_hdrs)
2504 {
2505         int i, len, ret, err = -EINVAL;
2506         u8 dir;
2507         struct sadb_address *sa;
2508         struct sadb_x_kmaddress *kma;
2509         struct sadb_x_policy *pol;
2510         struct sadb_x_ipsecrequest *rq;
2511         struct xfrm_selector sel;
2512         struct xfrm_migrate m[XFRM_MAX_DEPTH];
2513         struct xfrm_kmaddress k;
2514         struct net *net = sock_net(sk);
2515
2516         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2517                                      ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2518             !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2519                 err = -EINVAL;
2520                 goto out;
2521         }
2522
2523         kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2524         pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2525
2526         if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2527                 err = -EINVAL;
2528                 goto out;
2529         }
2530
2531         if (kma) {
2532                 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2533                 k.reserved = kma->sadb_x_kmaddress_reserved;
2534                 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2535                                           8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2536                                           &k.local, &k.remote, &k.family);
2537                 if (ret < 0) {
2538                         err = ret;
2539                         goto out;
2540                 }
2541         }
2542
2543         dir = pol->sadb_x_policy_dir - 1;
2544         memset(&sel, 0, sizeof(sel));
2545
2546         /* set source address info of selector */
2547         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2548         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2549         sel.prefixlen_s = sa->sadb_address_prefixlen;
2550         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2551         sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2552         if (sel.sport)
2553                 sel.sport_mask = htons(0xffff);
2554
2555         /* set destination address info of selector */
2556         sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2557         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2558         sel.prefixlen_d = sa->sadb_address_prefixlen;
2559         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2560         sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2561         if (sel.dport)
2562                 sel.dport_mask = htons(0xffff);
2563
2564         rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2565
2566         /* extract ipsecrequests */
2567         i = 0;
2568         len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2569
2570         while (len > 0 && i < XFRM_MAX_DEPTH) {
2571                 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2572                 if (ret < 0) {
2573                         err = ret;
2574                         goto out;
2575                 } else {
2576                         rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2577                         len -= ret;
2578                         i++;
2579                 }
2580         }
2581
2582         if (!i || len > 0) {
2583                 err = -EINVAL;
2584                 goto out;
2585         }
2586
2587         return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2588                             kma ? &k : NULL, net);
2589
2590  out:
2591         return err;
2592 }
2593 #else
2594 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2595                          const struct sadb_msg *hdr, void * const *ext_hdrs)
2596 {
2597         return -ENOPROTOOPT;
2598 }
2599 #endif
2600
2601
2602 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2603 {
2604         struct net *net = sock_net(sk);
2605         unsigned int dir;
2606         int err = 0, delete;
2607         struct sadb_x_policy *pol;
2608         struct xfrm_policy *xp;
2609         struct km_event c;
2610
2611         if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2612                 return -EINVAL;
2613
2614         dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2615         if (dir >= XFRM_POLICY_MAX)
2616                 return -EINVAL;
2617
2618         delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2619         xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2620                               dir, pol->sadb_x_policy_id, delete, &err);
2621         if (xp == NULL)
2622                 return -ENOENT;
2623
2624         if (delete) {
2625                 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2626                                 audit_get_loginuid(current),
2627                                 audit_get_sessionid(current), 0);
2628
2629                 if (err)
2630                         goto out;
2631                 c.seq = hdr->sadb_msg_seq;
2632                 c.portid = hdr->sadb_msg_pid;
2633                 c.data.byid = 1;
2634                 c.event = XFRM_MSG_DELPOLICY;
2635                 km_policy_notify(xp, dir, &c);
2636         } else {
2637                 err = key_pol_get_resp(sk, xp, hdr, dir);
2638         }
2639
2640 out:
2641         xfrm_pol_put(xp);
2642         if (delete && err == 0)
2643                 xfrm_garbage_collect(net);
2644         return err;
2645 }
2646
2647 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2648 {
2649         struct pfkey_sock *pfk = ptr;
2650         struct sk_buff *out_skb;
2651         struct sadb_msg *out_hdr;
2652         int err;
2653
2654         if (!pfkey_can_dump(&pfk->sk))
2655                 return -ENOBUFS;
2656
2657         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2658         if (IS_ERR(out_skb))
2659                 return PTR_ERR(out_skb);
2660
2661         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2662         if (err < 0)
2663                 return err;
2664
2665         out_hdr = (struct sadb_msg *) out_skb->data;
2666         out_hdr->sadb_msg_version = pfk->dump.msg_version;
2667         out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2668         out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2669         out_hdr->sadb_msg_errno = 0;
2670         out_hdr->sadb_msg_seq = count + 1;
2671         out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
2672
2673         if (pfk->dump.skb)
2674                 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
2675                                 &pfk->sk, sock_net(&pfk->sk));
2676         pfk->dump.skb = out_skb;
2677
2678         return 0;
2679 }
2680
2681 static int pfkey_dump_sp(struct pfkey_sock *pfk)
2682 {
2683         struct net *net = sock_net(&pfk->sk);
2684         return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2685 }
2686
2687 static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2688 {
2689         struct net *net = sock_net((struct sock *)pfk);
2690
2691         xfrm_policy_walk_done(&pfk->dump.u.policy, net);
2692 }
2693
2694 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2695 {
2696         struct pfkey_sock *pfk = pfkey_sk(sk);
2697
2698         if (pfk->dump.dump != NULL)
2699                 return -EBUSY;
2700
2701         pfk->dump.msg_version = hdr->sadb_msg_version;
2702         pfk->dump.msg_portid = hdr->sadb_msg_pid;
2703         pfk->dump.dump = pfkey_dump_sp;
2704         pfk->dump.done = pfkey_dump_sp_done;
2705         xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2706
2707         return pfkey_do_dump(pfk);
2708 }
2709
2710 static int key_notify_policy_flush(const struct km_event *c)
2711 {
2712         struct sk_buff *skb_out;
2713         struct sadb_msg *hdr;
2714
2715         skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2716         if (!skb_out)
2717                 return -ENOBUFS;
2718         hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2719         hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2720         hdr->sadb_msg_seq = c->seq;
2721         hdr->sadb_msg_pid = c->portid;
2722         hdr->sadb_msg_version = PF_KEY_V2;
2723         hdr->sadb_msg_errno = (uint8_t) 0;
2724         hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2725         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2726         hdr->sadb_msg_reserved = 0;
2727         pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
2728         return 0;
2729
2730 }
2731
2732 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2733 {
2734         struct net *net = sock_net(sk);
2735         struct km_event c;
2736         struct xfrm_audit audit_info;
2737         int err, err2;
2738
2739         audit_info.loginuid = audit_get_loginuid(current);
2740         audit_info.sessionid = audit_get_sessionid(current);
2741         audit_info.secid = 0;
2742         err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info);
2743         err2 = unicast_flush_resp(sk, hdr);
2744         if (err || err2) {
2745                 if (err == -ESRCH) /* empty table - old silent behavior */
2746                         return 0;
2747                 return err;
2748         }
2749
2750         c.data.type = XFRM_POLICY_TYPE_MAIN;
2751         c.event = XFRM_MSG_FLUSHPOLICY;
2752         c.portid = hdr->sadb_msg_pid;
2753         c.seq = hdr->sadb_msg_seq;
2754         c.net = net;
2755         km_policy_notify(NULL, 0, &c);
2756
2757         return 0;
2758 }
2759
2760 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2761                              const struct sadb_msg *hdr, void * const *ext_hdrs);
2762 static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2763         [SADB_RESERVED]         = pfkey_reserved,
2764         [SADB_GETSPI]           = pfkey_getspi,
2765         [SADB_UPDATE]           = pfkey_add,
2766         [SADB_ADD]              = pfkey_add,
2767         [SADB_DELETE]           = pfkey_delete,
2768         [SADB_GET]              = pfkey_get,
2769         [SADB_ACQUIRE]          = pfkey_acquire,
2770         [SADB_REGISTER]         = pfkey_register,
2771         [SADB_EXPIRE]           = NULL,
2772         [SADB_FLUSH]            = pfkey_flush,
2773         [SADB_DUMP]             = pfkey_dump,
2774         [SADB_X_PROMISC]        = pfkey_promisc,
2775         [SADB_X_PCHANGE]        = NULL,
2776         [SADB_X_SPDUPDATE]      = pfkey_spdadd,
2777         [SADB_X_SPDADD]         = pfkey_spdadd,
2778         [SADB_X_SPDDELETE]      = pfkey_spddelete,
2779         [SADB_X_SPDGET]         = pfkey_spdget,
2780         [SADB_X_SPDACQUIRE]     = NULL,
2781         [SADB_X_SPDDUMP]        = pfkey_spddump,
2782         [SADB_X_SPDFLUSH]       = pfkey_spdflush,
2783         [SADB_X_SPDSETIDX]      = pfkey_spdadd,
2784         [SADB_X_SPDDELETE2]     = pfkey_spdget,
2785         [SADB_X_MIGRATE]        = pfkey_migrate,
2786 };
2787
2788 static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
2789 {
2790         void *ext_hdrs[SADB_EXT_MAX];
2791         int err;
2792
2793         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2794                         BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
2795
2796         memset(ext_hdrs, 0, sizeof(ext_hdrs));
2797         err = parse_exthdrs(skb, hdr, ext_hdrs);
2798         if (!err) {
2799                 err = -EOPNOTSUPP;
2800                 if (pfkey_funcs[hdr->sadb_msg_type])
2801                         err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2802         }
2803         return err;
2804 }
2805
2806 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2807 {
2808         struct sadb_msg *hdr = NULL;
2809
2810         if (skb->len < sizeof(*hdr)) {
2811                 *errp = -EMSGSIZE;
2812         } else {
2813                 hdr = (struct sadb_msg *) skb->data;
2814                 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2815                     hdr->sadb_msg_reserved != 0 ||
2816                     (hdr->sadb_msg_type <= SADB_RESERVED ||
2817                      hdr->sadb_msg_type > SADB_MAX)) {
2818                         hdr = NULL;
2819                         *errp = -EINVAL;
2820                 } else if (hdr->sadb_msg_len != (skb->len /
2821                                                  sizeof(uint64_t)) ||
2822                            hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2823                                                 sizeof(uint64_t))) {
2824                         hdr = NULL;
2825                         *errp = -EMSGSIZE;
2826                 } else {
2827                         *errp = 0;
2828                 }
2829         }
2830         return hdr;
2831 }
2832
2833 static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2834                                 const struct xfrm_algo_desc *d)
2835 {
2836         unsigned int id = d->desc.sadb_alg_id;
2837
2838         if (id >= sizeof(t->aalgos) * 8)
2839                 return 0;
2840
2841         return (t->aalgos >> id) & 1;
2842 }
2843
2844 static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2845                                 const struct xfrm_algo_desc *d)
2846 {
2847         unsigned int id = d->desc.sadb_alg_id;
2848
2849         if (id >= sizeof(t->ealgos) * 8)
2850                 return 0;
2851
2852         return (t->ealgos >> id) & 1;
2853 }
2854
2855 static int count_ah_combs(const struct xfrm_tmpl *t)
2856 {
2857         int i, sz = 0;
2858
2859         for (i = 0; ; i++) {
2860                 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2861                 if (!aalg)
2862                         break;
2863                 if (!aalg->pfkey_supported)
2864                         continue;
2865                 if (aalg_tmpl_set(t, aalg) && aalg->available)
2866                         sz += sizeof(struct sadb_comb);
2867         }
2868         return sz + sizeof(struct sadb_prop);
2869 }
2870
2871 static int count_esp_combs(const struct xfrm_tmpl *t)
2872 {
2873         int i, k, sz = 0;
2874
2875         for (i = 0; ; i++) {
2876                 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2877                 if (!ealg)
2878                         break;
2879
2880                 if (!ealg->pfkey_supported)
2881                         continue;
2882
2883                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2884                         continue;
2885
2886                 for (k = 1; ; k++) {
2887                         const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2888                         if (!aalg)
2889                                 break;
2890
2891                         if (!aalg->pfkey_supported)
2892                                 continue;
2893
2894                         if (aalg_tmpl_set(t, aalg) && aalg->available)
2895                                 sz += sizeof(struct sadb_comb);
2896                 }
2897         }
2898         return sz + sizeof(struct sadb_prop);
2899 }
2900
2901 static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2902 {
2903         struct sadb_prop *p;
2904         int i;
2905
2906         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2907         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2908         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2909         p->sadb_prop_replay = 32;
2910         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2911
2912         for (i = 0; ; i++) {
2913                 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2914                 if (!aalg)
2915                         break;
2916
2917                 if (!aalg->pfkey_supported)
2918                         continue;
2919
2920                 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2921                         struct sadb_comb *c;
2922                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2923                         memset(c, 0, sizeof(*c));
2924                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2925                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2926                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2927                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2928                         c->sadb_comb_hard_addtime = 24*60*60;
2929                         c->sadb_comb_soft_addtime = 20*60*60;
2930                         c->sadb_comb_hard_usetime = 8*60*60;
2931                         c->sadb_comb_soft_usetime = 7*60*60;
2932                 }
2933         }
2934 }
2935
2936 static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2937 {
2938         struct sadb_prop *p;
2939         int i, k;
2940
2941         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2942         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2943         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2944         p->sadb_prop_replay = 32;
2945         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2946
2947         for (i=0; ; i++) {
2948                 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2949                 if (!ealg)
2950                         break;
2951
2952                 if (!ealg->pfkey_supported)
2953                         continue;
2954
2955                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2956                         continue;
2957
2958                 for (k = 1; ; k++) {
2959                         struct sadb_comb *c;
2960                         const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2961                         if (!aalg)
2962                                 break;
2963                         if (!aalg->pfkey_supported)
2964                                 continue;
2965                         if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2966                                 continue;
2967                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2968                         memset(c, 0, sizeof(*c));
2969                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2970                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2971                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2972                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2973                         c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2974                         c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2975                         c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2976                         c->sadb_comb_hard_addtime = 24*60*60;
2977                         c->sadb_comb_soft_addtime = 20*60*60;
2978                         c->sadb_comb_hard_usetime = 8*60*60;
2979                         c->sadb_comb_soft_usetime = 7*60*60;
2980                 }
2981         }
2982 }
2983
2984 static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
2985 {
2986         return 0;
2987 }
2988
2989 static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
2990 {
2991         struct sk_buff *out_skb;
2992         struct sadb_msg *out_hdr;
2993         int hard;
2994         int hsc;
2995
2996         hard = c->data.hard;
2997         if (hard)
2998                 hsc = 2;
2999         else
3000                 hsc = 1;
3001
3002         out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
3003         if (IS_ERR(out_skb))
3004                 return PTR_ERR(out_skb);
3005
3006         out_hdr = (struct sadb_msg *) out_skb->data;
3007         out_hdr->sadb_msg_version = PF_KEY_V2;
3008         out_hdr->sadb_msg_type = SADB_EXPIRE;
3009         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3010         out_hdr->sadb_msg_errno = 0;
3011         out_hdr->sadb_msg_reserved = 0;
3012         out_hdr->sadb_msg_seq = 0;
3013         out_hdr->sadb_msg_pid = 0;
3014
3015         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
3016         return 0;
3017 }
3018
3019 static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
3020 {
3021         struct net *net = x ? xs_net(x) : c->net;
3022         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3023
3024         if (atomic_read(&net_pfkey->socks_nr) == 0)
3025                 return 0;
3026
3027         switch (c->event) {
3028         case XFRM_MSG_EXPIRE:
3029                 return key_notify_sa_expire(x, c);
3030         case XFRM_MSG_DELSA:
3031         case XFRM_MSG_NEWSA:
3032         case XFRM_MSG_UPDSA:
3033                 return key_notify_sa(x, c);
3034         case XFRM_MSG_FLUSHSA:
3035                 return key_notify_sa_flush(c);
3036         case XFRM_MSG_NEWAE: /* not yet supported */
3037                 break;
3038         default:
3039                 pr_err("pfkey: Unknown SA event %d\n", c->event);
3040                 break;
3041         }
3042
3043         return 0;
3044 }
3045
3046 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3047 {
3048         if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3049                 return 0;
3050
3051         switch (c->event) {
3052         case XFRM_MSG_POLEXPIRE:
3053                 return key_notify_policy_expire(xp, c);
3054         case XFRM_MSG_DELPOLICY:
3055         case XFRM_MSG_NEWPOLICY:
3056         case XFRM_MSG_UPDPOLICY:
3057                 return key_notify_policy(xp, dir, c);
3058         case XFRM_MSG_FLUSHPOLICY:
3059                 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3060                         break;
3061                 return key_notify_policy_flush(c);
3062         default:
3063                 pr_err("pfkey: Unknown policy event %d\n", c->event);
3064                 break;
3065         }
3066
3067         return 0;
3068 }
3069
3070 static u32 get_acqseq(void)
3071 {
3072         u32 res;
3073         static atomic_t acqseq;
3074
3075         do {
3076                 res = atomic_inc_return(&acqseq);
3077         } while (!res);
3078         return res;
3079 }
3080
3081 static bool pfkey_is_alive(const struct km_event *c)
3082 {
3083         struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id);
3084         struct sock *sk;
3085         bool is_alive = false;
3086
3087         rcu_read_lock();
3088         sk_for_each_rcu(sk, &net_pfkey->table) {
3089                 if (pfkey_sk(sk)->registered) {
3090                         is_alive = true;
3091                         break;
3092                 }
3093         }
3094         rcu_read_unlock();
3095
3096         return is_alive;
3097 }
3098
3099 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
3100 {
3101         struct sk_buff *skb;
3102         struct sadb_msg *hdr;
3103         struct sadb_address *addr;
3104         struct sadb_x_policy *pol;
3105         int sockaddr_size;
3106         int size;
3107         struct sadb_x_sec_ctx *sec_ctx;
3108         struct xfrm_sec_ctx *xfrm_ctx;
3109         int ctx_size = 0;
3110
3111         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3112         if (!sockaddr_size)
3113                 return -EINVAL;
3114
3115         size = sizeof(struct sadb_msg) +
3116                 (sizeof(struct sadb_address) * 2) +
3117                 (sockaddr_size * 2) +
3118                 sizeof(struct sadb_x_policy);
3119
3120         if (x->id.proto == IPPROTO_AH)
3121                 size += count_ah_combs(t);
3122         else if (x->id.proto == IPPROTO_ESP)
3123                 size += count_esp_combs(t);
3124
3125         if ((xfrm_ctx = x->security)) {
3126                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3127                 size +=  sizeof(struct sadb_x_sec_ctx) + ctx_size;
3128         }
3129
3130         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3131         if (skb == NULL)
3132                 return -ENOMEM;
3133
3134         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3135         hdr->sadb_msg_version = PF_KEY_V2;
3136         hdr->sadb_msg_type = SADB_ACQUIRE;
3137         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3138         hdr->sadb_msg_len = size / sizeof(uint64_t);
3139         hdr->sadb_msg_errno = 0;
3140         hdr->sadb_msg_reserved = 0;
3141         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3142         hdr->sadb_msg_pid = 0;
3143
3144         /* src address */
3145         addr = (struct sadb_address*) skb_put(skb,
3146                                               sizeof(struct sadb_address)+sockaddr_size);
3147         addr->sadb_address_len =
3148                 (sizeof(struct sadb_address)+sockaddr_size)/
3149                         sizeof(uint64_t);
3150         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3151         addr->sadb_address_proto = 0;
3152         addr->sadb_address_reserved = 0;
3153         addr->sadb_address_prefixlen =
3154                 pfkey_sockaddr_fill(&x->props.saddr, 0,
3155                                     (struct sockaddr *) (addr + 1),
3156                                     x->props.family);
3157         if (!addr->sadb_address_prefixlen)
3158                 BUG();
3159
3160         /* dst address */
3161         addr = (struct sadb_address*) skb_put(skb,
3162                                               sizeof(struct sadb_address)+sockaddr_size);
3163         addr->sadb_address_len =
3164                 (sizeof(struct sadb_address)+sockaddr_size)/
3165                         sizeof(uint64_t);
3166         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3167         addr->sadb_address_proto = 0;
3168         addr->sadb_address_reserved = 0;
3169         addr->sadb_address_prefixlen =
3170                 pfkey_sockaddr_fill(&x->id.daddr, 0,
3171                                     (struct sockaddr *) (addr + 1),
3172                                     x->props.family);
3173         if (!addr->sadb_address_prefixlen)
3174                 BUG();
3175
3176         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
3177         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3178         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3179         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3180         pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
3181         pol->sadb_x_policy_reserved = 0;
3182         pol->sadb_x_policy_id = xp->index;
3183         pol->sadb_x_policy_priority = xp->priority;
3184
3185         /* Set sadb_comb's. */
3186         if (x->id.proto == IPPROTO_AH)
3187                 dump_ah_combs(skb, t);
3188         else if (x->id.proto == IPPROTO_ESP)
3189                 dump_esp_combs(skb, t);
3190
3191         /* security context */
3192         if (xfrm_ctx) {
3193                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3194                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3195                 sec_ctx->sadb_x_sec_len =
3196                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3197                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3198                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3199                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3200                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3201                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3202                        xfrm_ctx->ctx_len);
3203         }
3204
3205         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
3206 }
3207
3208 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3209                                                 u8 *data, int len, int *dir)
3210 {
3211         struct net *net = sock_net(sk);
3212         struct xfrm_policy *xp;
3213         struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3214         struct sadb_x_sec_ctx *sec_ctx;
3215
3216         switch (sk->sk_family) {
3217         case AF_INET:
3218                 if (opt != IP_IPSEC_POLICY) {
3219                         *dir = -EOPNOTSUPP;
3220                         return NULL;
3221                 }
3222                 break;
3223 #if IS_ENABLED(CONFIG_IPV6)
3224         case AF_INET6:
3225                 if (opt != IPV6_IPSEC_POLICY) {
3226                         *dir = -EOPNOTSUPP;
3227                         return NULL;
3228                 }
3229                 break;
3230 #endif
3231         default:
3232                 *dir = -EINVAL;
3233                 return NULL;
3234         }
3235
3236         *dir = -EINVAL;
3237
3238         if (len < sizeof(struct sadb_x_policy) ||
3239             pol->sadb_x_policy_len*8 > len ||
3240             pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3241             (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3242                 return NULL;
3243
3244         xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3245         if (xp == NULL) {
3246                 *dir = -ENOBUFS;
3247                 return NULL;
3248         }
3249
3250         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3251                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3252
3253         xp->lft.soft_byte_limit = XFRM_INF;
3254         xp->lft.hard_byte_limit = XFRM_INF;
3255         xp->lft.soft_packet_limit = XFRM_INF;
3256         xp->lft.hard_packet_limit = XFRM_INF;
3257         xp->family = sk->sk_family;
3258
3259         xp->xfrm_nr = 0;
3260         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3261             (*dir = parse_ipsecrequests(xp, pol)) < 0)
3262                 goto out;
3263
3264         /* security context too */
3265         if (len >= (pol->sadb_x_policy_len*8 +
3266             sizeof(struct sadb_x_sec_ctx))) {
3267                 char *p = (char *)pol;
3268                 struct xfrm_user_sec_ctx *uctx;
3269
3270                 p += pol->sadb_x_policy_len*8;
3271                 sec_ctx = (struct sadb_x_sec_ctx *)p;
3272                 if (len < pol->sadb_x_policy_len*8 +
3273                     sec_ctx->sadb_x_sec_len) {
3274                         *dir = -EINVAL;
3275                         goto out;
3276                 }
3277                 if ((*dir = verify_sec_ctx_len(p)))
3278                         goto out;
3279                 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC);
3280                 *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC);
3281                 kfree(uctx);
3282
3283                 if (*dir)
3284                         goto out;
3285         }
3286
3287         *dir = pol->sadb_x_policy_dir-1;
3288         return xp;
3289
3290 out:
3291         xp->walk.dead = 1;
3292         xfrm_policy_destroy(xp);
3293         return NULL;
3294 }
3295
3296 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3297 {
3298         struct sk_buff *skb;
3299         struct sadb_msg *hdr;
3300         struct sadb_sa *sa;
3301         struct sadb_address *addr;
3302         struct sadb_x_nat_t_port *n_port;
3303         int sockaddr_size;
3304         int size;
3305         __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3306         struct xfrm_encap_tmpl *natt = NULL;
3307
3308         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3309         if (!sockaddr_size)
3310                 return -EINVAL;
3311
3312         if (!satype)
3313                 return -EINVAL;
3314
3315         if (!x->encap)
3316                 return -EINVAL;
3317
3318         natt = x->encap;
3319
3320         /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3321          *
3322          * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3323          * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3324          */
3325
3326         size = sizeof(struct sadb_msg) +
3327                 sizeof(struct sadb_sa) +
3328                 (sizeof(struct sadb_address) * 2) +
3329                 (sockaddr_size * 2) +
3330                 (sizeof(struct sadb_x_nat_t_port) * 2);
3331
3332         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3333         if (skb == NULL)
3334                 return -ENOMEM;
3335
3336         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3337         hdr->sadb_msg_version = PF_KEY_V2;
3338         hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3339         hdr->sadb_msg_satype = satype;
3340         hdr->sadb_msg_len = size / sizeof(uint64_t);
3341         hdr->sadb_msg_errno = 0;
3342         hdr->sadb_msg_reserved = 0;
3343         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3344         hdr->sadb_msg_pid = 0;
3345
3346         /* SA */
3347         sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3348         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3349         sa->sadb_sa_exttype = SADB_EXT_SA;
3350         sa->sadb_sa_spi = x->id.spi;
3351         sa->sadb_sa_replay = 0;
3352         sa->sadb_sa_state = 0;
3353         sa->sadb_sa_auth = 0;
3354         sa->sadb_sa_encrypt = 0;
3355         sa->sadb_sa_flags = 0;
3356
3357         /* ADDRESS_SRC (old addr) */
3358         addr = (struct sadb_address*)
3359                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3360         addr->sadb_address_len =
3361                 (sizeof(struct sadb_address)+sockaddr_size)/
3362                         sizeof(uint64_t);
3363         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3364         addr->sadb_address_proto = 0;
3365         addr->sadb_address_reserved = 0;
3366         addr->sadb_address_prefixlen =
3367                 pfkey_sockaddr_fill(&x->props.saddr, 0,
3368                                     (struct sockaddr *) (addr + 1),
3369                                     x->props.family);
3370         if (!addr->sadb_address_prefixlen)
3371                 BUG();
3372
3373         /* NAT_T_SPORT (old port) */
3374         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3375         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3376         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3377         n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3378         n_port->sadb_x_nat_t_port_reserved = 0;
3379
3380         /* ADDRESS_DST (new addr) */
3381         addr = (struct sadb_address*)
3382                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3383         addr->sadb_address_len =
3384                 (sizeof(struct sadb_address)+sockaddr_size)/
3385                         sizeof(uint64_t);
3386         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3387         addr->sadb_address_proto = 0;
3388         addr->sadb_address_reserved = 0;
3389         addr->sadb_address_prefixlen =
3390                 pfkey_sockaddr_fill(ipaddr, 0,
3391                                     (struct sockaddr *) (addr + 1),
3392                                     x->props.family);
3393         if (!addr->sadb_address_prefixlen)
3394                 BUG();
3395
3396         /* NAT_T_DPORT (new port) */
3397         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3398         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3399         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3400         n_port->sadb_x_nat_t_port_port = sport;
3401         n_port->sadb_x_nat_t_port_reserved = 0;
3402
3403         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
3404 }
3405
3406 #ifdef CONFIG_NET_KEY_MIGRATE
3407 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3408                             const struct xfrm_selector *sel)
3409 {
3410         struct sadb_address *addr;
3411         addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3412         addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3413         addr->sadb_address_exttype = type;
3414         addr->sadb_address_proto = sel->proto;
3415         addr->sadb_address_reserved = 0;
3416
3417         switch (type) {
3418         case SADB_EXT_ADDRESS_SRC:
3419                 addr->sadb_address_prefixlen = sel->prefixlen_s;
3420                 pfkey_sockaddr_fill(&sel->saddr, 0,
3421                                     (struct sockaddr *)(addr + 1),
3422                                     sel->family);
3423                 break;
3424         case SADB_EXT_ADDRESS_DST:
3425                 addr->sadb_address_prefixlen = sel->prefixlen_d;
3426                 pfkey_sockaddr_fill(&sel->daddr, 0,
3427                                     (struct sockaddr *)(addr + 1),
3428                                     sel->family);
3429                 break;
3430         default:
3431                 return -EINVAL;
3432         }
3433
3434         return 0;
3435 }
3436
3437
3438 static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
3439 {
3440         struct sadb_x_kmaddress *kma;
3441         u8 *sa;
3442         int family = k->family;
3443         int socklen = pfkey_sockaddr_len(family);
3444         int size_req;
3445
3446         size_req = (sizeof(struct sadb_x_kmaddress) +
3447                     pfkey_sockaddr_pair_size(family));
3448
3449         kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req);
3450         memset(kma, 0, size_req);
3451         kma->sadb_x_kmaddress_len = size_req / 8;
3452         kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3453         kma->sadb_x_kmaddress_reserved = k->reserved;
3454
3455         sa = (u8 *)(kma + 1);
3456         if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3457             !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3458                 return -EINVAL;
3459
3460         return 0;
3461 }
3462
3463 static int set_ipsecrequest(struct sk_buff *skb,
3464                             uint8_t proto, uint8_t mode, int level,
3465                             uint32_t reqid, uint8_t family,
3466                             const xfrm_address_t *src, const xfrm_address_t *dst)
3467 {
3468         struct sadb_x_ipsecrequest *rq;
3469         u8 *sa;
3470         int socklen = pfkey_sockaddr_len(family);
3471         int size_req;
3472
3473         size_req = sizeof(struct sadb_x_ipsecrequest) +
3474                    pfkey_sockaddr_pair_size(family);
3475
3476         rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3477         memset(rq, 0, size_req);
3478         rq->sadb_x_ipsecrequest_len = size_req;
3479         rq->sadb_x_ipsecrequest_proto = proto;
3480         rq->sadb_x_ipsecrequest_mode = mode;
3481         rq->sadb_x_ipsecrequest_level = level;
3482         rq->sadb_x_ipsecrequest_reqid = reqid;
3483
3484         sa = (u8 *) (rq + 1);
3485         if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3486             !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3487                 return -EINVAL;
3488
3489         return 0;
3490 }
3491 #endif
3492
3493 #ifdef CONFIG_NET_KEY_MIGRATE
3494 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3495                               const struct xfrm_migrate *m, int num_bundles,
3496                               const struct xfrm_kmaddress *k)
3497 {
3498         int i;
3499         int sasize_sel;
3500         int size = 0;
3501         int size_pol = 0;
3502         struct sk_buff *skb;
3503         struct sadb_msg *hdr;
3504         struct sadb_x_policy *pol;
3505         const struct xfrm_migrate *mp;
3506
3507         if (type != XFRM_POLICY_TYPE_MAIN)
3508                 return 0;
3509
3510         if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3511                 return -EINVAL;
3512
3513         if (k != NULL) {
3514                 /* addresses for KM */
3515                 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3516                                      pfkey_sockaddr_pair_size(k->family));
3517         }
3518
3519         /* selector */
3520         sasize_sel = pfkey_sockaddr_size(sel->family);
3521         if (!sasize_sel)
3522                 return -EINVAL;
3523         size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3524
3525         /* policy info */
3526         size_pol += sizeof(struct sadb_x_policy);
3527
3528         /* ipsecrequests */
3529         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3530                 /* old locator pair */
3531                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3532                             pfkey_sockaddr_pair_size(mp->old_family);
3533                 /* new locator pair */
3534                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3535                             pfkey_sockaddr_pair_size(mp->new_family);
3536         }
3537
3538         size += sizeof(struct sadb_msg) + size_pol;
3539
3540         /* alloc buffer */
3541         skb = alloc_skb(size, GFP_ATOMIC);
3542         if (skb == NULL)
3543                 return -ENOMEM;
3544
3545         hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3546         hdr->sadb_msg_version = PF_KEY_V2;
3547         hdr->sadb_msg_type = SADB_X_MIGRATE;
3548         hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3549         hdr->sadb_msg_len = size / 8;
3550         hdr->sadb_msg_errno = 0;
3551         hdr->sadb_msg_reserved = 0;
3552         hdr->sadb_msg_seq = 0;
3553         hdr->sadb_msg_pid = 0;
3554
3555         /* Addresses to be used by KM for negotiation, if ext is available */
3556         if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3557                 goto err;
3558
3559         /* selector src */
3560         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3561
3562         /* selector dst */
3563         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3564
3565         /* policy information */
3566         pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3567         pol->sadb_x_policy_len = size_pol / 8;
3568         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3569         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3570         pol->sadb_x_policy_dir = dir + 1;
3571         pol->sadb_x_policy_reserved = 0;
3572         pol->sadb_x_policy_id = 0;
3573         pol->sadb_x_policy_priority = 0;
3574
3575         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3576                 /* old ipsecrequest */
3577                 int mode = pfkey_mode_from_xfrm(mp->mode);
3578                 if (mode < 0)
3579                         goto err;
3580                 if (set_ipsecrequest(skb, mp->proto, mode,
3581                                      (mp->reqid ?  IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3582                                      mp->reqid, mp->old_family,
3583                                      &mp->old_saddr, &mp->old_daddr) < 0)
3584                         goto err;
3585
3586                 /* new ipsecrequest */
3587                 if (set_ipsecrequest(skb, mp->proto, mode,
3588                                      (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3589                                      mp->reqid, mp->new_family,
3590                                      &mp->new_saddr, &mp->new_daddr) < 0)
3591                         goto err;
3592         }
3593
3594         /* broadcast migrate message to sockets */
3595         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
3596
3597         return 0;
3598
3599 err:
3600         kfree_skb(skb);
3601         return -EINVAL;
3602 }
3603 #else
3604 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3605                               const struct xfrm_migrate *m, int num_bundles,
3606                               const struct xfrm_kmaddress *k)
3607 {
3608         return -ENOPROTOOPT;
3609 }
3610 #endif
3611
3612 static int pfkey_sendmsg(struct kiocb *kiocb,
3613                          struct socket *sock, struct msghdr *msg, size_t len)
3614 {
3615         struct sock *sk = sock->sk;
3616         struct sk_buff *skb = NULL;
3617         struct sadb_msg *hdr = NULL;
3618         int err;
3619         struct net *net = sock_net(sk);
3620
3621         err = -EOPNOTSUPP;
3622         if (msg->msg_flags & MSG_OOB)
3623                 goto out;
3624
3625         err = -EMSGSIZE;
3626         if ((unsigned int)len > sk->sk_sndbuf - 32)
3627                 goto out;
3628
3629         err = -ENOBUFS;
3630         skb = alloc_skb(len, GFP_KERNEL);
3631         if (skb == NULL)
3632                 goto out;
3633
3634         err = -EFAULT;
3635         if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3636                 goto out;
3637
3638         hdr = pfkey_get_base_msg(skb, &err);
3639         if (!hdr)
3640                 goto out;
3641
3642         mutex_lock(&net->xfrm.xfrm_cfg_mutex);
3643         err = pfkey_process(sk, skb, hdr);
3644         mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
3645
3646 out:
3647         if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3648                 err = 0;
3649         kfree_skb(skb);
3650
3651         return err ? : len;
3652 }
3653
3654 static int pfkey_recvmsg(struct kiocb *kiocb,
3655                          struct socket *sock, struct msghdr *msg, size_t len,
3656                          int flags)
3657 {
3658         struct sock *sk = sock->sk;
3659         struct pfkey_sock *pfk = pfkey_sk(sk);
3660         struct sk_buff *skb;
3661         int copied, err;
3662
3663         err = -EINVAL;
3664         if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3665                 goto out;
3666
3667         skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3668         if (skb == NULL)
3669                 goto out;
3670
3671         copied = skb->len;
3672         if (copied > len) {
3673                 msg->msg_flags |= MSG_TRUNC;
3674                 copied = len;
3675         }
3676
3677         skb_reset_transport_header(skb);
3678         err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3679         if (err)
3680                 goto out_free;
3681
3682         sock_recv_ts_and_drops(msg, sk, skb);
3683
3684         err = (flags & MSG_TRUNC) ? skb->len : copied;
3685
3686         if (pfk->dump.dump != NULL &&
3687             3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3688                 pfkey_do_dump(pfk);
3689
3690 out_free:
3691         skb_free_datagram(sk, skb);
3692 out:
3693         return err;
3694 }
3695
3696 static const struct proto_ops pfkey_ops = {
3697         .family         =       PF_KEY,
3698         .owner          =       THIS_MODULE,
3699         /* Operations that make no sense on pfkey sockets. */
3700         .bind           =       sock_no_bind,
3701         .connect        =       sock_no_connect,
3702         .socketpair     =       sock_no_socketpair,
3703         .accept         =       sock_no_accept,
3704         .getname        =       sock_no_getname,
3705         .ioctl          =       sock_no_ioctl,
3706         .listen         =       sock_no_listen,
3707         .shutdown       =       sock_no_shutdown,
3708         .setsockopt     =       sock_no_setsockopt,
3709         .getsockopt     =       sock_no_getsockopt,
3710         .mmap           =       sock_no_mmap,
3711         .sendpage       =       sock_no_sendpage,
3712
3713         /* Now the operations that really occur. */
3714         .release        =       pfkey_release,
3715         .poll           =       datagram_poll,
3716         .sendmsg        =       pfkey_sendmsg,
3717         .recvmsg        =       pfkey_recvmsg,
3718 };
3719
3720 static const struct net_proto_family pfkey_family_ops = {
3721         .family =       PF_KEY,
3722         .create =       pfkey_create,
3723         .owner  =       THIS_MODULE,
3724 };
3725
3726 #ifdef CONFIG_PROC_FS
3727 static int pfkey_seq_show(struct seq_file *f, void *v)
3728 {
3729         struct sock *s = sk_entry(v);
3730
3731         if (v == SEQ_START_TOKEN)
3732                 seq_printf(f ,"sk       RefCnt Rmem   Wmem   User   Inode\n");
3733         else
3734                 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
3735                                s,
3736                                atomic_read(&s->sk_refcnt),
3737                                sk_rmem_alloc_get(s),
3738                                sk_wmem_alloc_get(s),
3739                                from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
3740                                sock_i_ino(s)
3741                                );
3742         return 0;
3743 }
3744
3745 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3746         __acquires(rcu)
3747 {
3748         struct net *net = seq_file_net(f);
3749         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3750
3751         rcu_read_lock();
3752         return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
3753 }
3754
3755 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3756 {
3757         struct net *net = seq_file_net(f);
3758         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3759
3760         return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
3761 }
3762
3763 static void pfkey_seq_stop(struct seq_file *f, void *v)
3764         __releases(rcu)
3765 {
3766         rcu_read_unlock();
3767 }
3768
3769 static const struct seq_operations pfkey_seq_ops = {
3770         .start  = pfkey_seq_start,
3771         .next   = pfkey_seq_next,
3772         .stop   = pfkey_seq_stop,
3773         .show   = pfkey_seq_show,
3774 };
3775
3776 static int pfkey_seq_open(struct inode *inode, struct file *file)
3777 {
3778         return seq_open_net(inode, file, &pfkey_seq_ops,
3779                             sizeof(struct seq_net_private));
3780 }
3781
3782 static const struct file_operations pfkey_proc_ops = {
3783         .open    = pfkey_seq_open,
3784         .read    = seq_read,
3785         .llseek  = seq_lseek,
3786         .release = seq_release_net,
3787 };
3788
3789 static int __net_init pfkey_init_proc(struct net *net)
3790 {
3791         struct proc_dir_entry *e;
3792
3793         e = proc_create("pfkey", 0, net->proc_net, &pfkey_proc_ops);
3794         if (e == NULL)
3795                 return -ENOMEM;
3796
3797         return 0;
3798 }
3799
3800 static void __net_exit pfkey_exit_proc(struct net *net)
3801 {
3802         remove_proc_entry("pfkey", net->proc_net);
3803 }
3804 #else
3805 static inline int pfkey_init_proc(struct net *net)
3806 {
3807         return 0;
3808 }
3809
3810 static inline void pfkey_exit_proc(struct net *net)
3811 {
3812 }
3813 #endif
3814
3815 static struct xfrm_mgr pfkeyv2_mgr =
3816 {
3817         .id             = "pfkeyv2",
3818         .notify         = pfkey_send_notify,
3819         .acquire        = pfkey_send_acquire,
3820         .compile_policy = pfkey_compile_policy,
3821         .new_mapping    = pfkey_send_new_mapping,
3822         .notify_policy  = pfkey_send_policy_notify,
3823         .migrate        = pfkey_send_migrate,
3824         .is_alive       = pfkey_is_alive,
3825 };
3826
3827 static int __net_init pfkey_net_init(struct net *net)
3828 {
3829         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3830         int rv;
3831
3832         INIT_HLIST_HEAD(&net_pfkey->table);
3833         atomic_set(&net_pfkey->socks_nr, 0);
3834
3835         rv = pfkey_init_proc(net);
3836
3837         return rv;
3838 }
3839
3840 static void __net_exit pfkey_net_exit(struct net *net)
3841 {
3842         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3843
3844         pfkey_exit_proc(net);
3845         BUG_ON(!hlist_empty(&net_pfkey->table));
3846 }
3847
3848 static struct pernet_operations pfkey_net_ops = {
3849         .init = pfkey_net_init,
3850         .exit = pfkey_net_exit,
3851         .id   = &pfkey_net_id,
3852         .size = sizeof(struct netns_pfkey),
3853 };
3854
3855 static void __exit ipsec_pfkey_exit(void)
3856 {
3857         xfrm_unregister_km(&pfkeyv2_mgr);
3858         sock_unregister(PF_KEY);
3859         unregister_pernet_subsys(&pfkey_net_ops);
3860         proto_unregister(&key_proto);
3861 }
3862
3863 static int __init ipsec_pfkey_init(void)
3864 {
3865         int err = proto_register(&key_proto, 0);
3866
3867         if (err != 0)
3868                 goto out;
3869
3870         err = register_pernet_subsys(&pfkey_net_ops);
3871         if (err != 0)
3872                 goto out_unregister_key_proto;
3873         err = sock_register(&pfkey_family_ops);
3874         if (err != 0)
3875                 goto out_unregister_pernet;
3876         err = xfrm_register_km(&pfkeyv2_mgr);
3877         if (err != 0)
3878                 goto out_sock_unregister;
3879 out:
3880         return err;
3881
3882 out_sock_unregister:
3883         sock_unregister(PF_KEY);
3884 out_unregister_pernet:
3885         unregister_pernet_subsys(&pfkey_net_ops);
3886 out_unregister_key_proto:
3887         proto_unregister(&key_proto);
3888         goto out;
3889 }
3890
3891 module_init(ipsec_pfkey_init);
3892 module_exit(ipsec_pfkey_exit);
3893 MODULE_LICENSE("GPL");
3894 MODULE_ALIAS_NETPROTO(PF_KEY);