net/key/af_key.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * net/key/af_key.c     An implementation of PF_KEYv2 sockets.
   4  *
   5  * Authors:     Maxim Giryaev   <gem@asplinux.ru>
   6  *              David S. Miller <davem@redhat.com>
   7  *              Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
   8  *              Kunihiro Ishiguro <kunihiro@ipinfusion.com>
   9  *              Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
  10  *              Derek Atkins <derek@ihtfp.com>
  11  */
  12
  13 #include <linux/capability.h>
  14 #include <linux/module.h>
  15 #include <linux/kernel.h>
  16 #include <linux/socket.h>
  17 #include <linux/pfkeyv2.h>
  18 #include <linux/ipsec.h>
  19 #include <linux/skbuff.h>
  20 #include <linux/rtnetlink.h>
  21 #include <linux/in.h>
  22 #include <linux/in6.h>
  23 #include <linux/proc_fs.h>
  24 #include <linux/init.h>
  25 #include <linux/slab.h>
  26 #include <net/net_namespace.h>
  27 #include <net/netns/generic.h>
  28 #include <net/xfrm.h>
  29
  30 #include <net/sock.h>
  31
  32 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
  33 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
  34
  35 static unsigned int pfkey_net_id __read_mostly;
  36 struct netns_pfkey {
  37         /* List of all pfkey sockets. */
  38         struct hlist_head table;
  39         atomic_t socks_nr;
  40 };
  41 static DEFINE_MUTEX(pfkey_mutex);
  42
  43 #define DUMMY_MARK 0
  44 static const struct xfrm_mark dummy_mark = {0, 0};
  45 struct pfkey_sock {
  46         /* struct sock must be the first member of struct pfkey_sock */
  47         struct sock     sk;
  48         int             registered;
  49         int             promisc;
  50
  51         struct {
  52                 uint8_t         msg_version;
  53                 uint32_t        msg_portid;
  54                 int             (*dump)(struct pfkey_sock *sk);
  55                 void            (*done)(struct pfkey_sock *sk);
  56                 union {
  57                         struct xfrm_policy_walk policy;
  58                         struct xfrm_state_walk  state;
  59                 } u;
  60                 struct sk_buff  *skb;
  61         } dump;
  62         struct mutex dump_lock;
  63 };
  64
  65 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
  66                                xfrm_address_t *saddr, xfrm_address_t *daddr,
  67                                u16 *family);
  68
  69 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
  70 {
  71         return (struct pfkey_sock *)sk;
  72 }
  73
  74 static int pfkey_can_dump(const struct sock *sk)
  75 {
  76         if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
  77                 return 1;
  78         return 0;
  79 }
  80
  81 static void pfkey_terminate_dump(struct pfkey_sock *pfk)
  82 {
  83         if (pfk->dump.dump) {
  84                 if (pfk->dump.skb) {
  85                         kfree_skb(pfk->dump.skb);
  86                         pfk->dump.skb = NULL;
  87                 }
  88                 pfk->dump.done(pfk);
  89                 pfk->dump.dump = NULL;
  90                 pfk->dump.done = NULL;
  91         }
  92 }
  93
  94 static void pfkey_sock_destruct(struct sock *sk)
  95 {
  96         struct net *net = sock_net(sk);
  97         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
  98
  99         pfkey_terminate_dump(pfkey_sk(sk));
 100         skb_queue_purge(&sk->sk_receive_queue);
 101
 102         if (!sock_flag(sk, SOCK_DEAD)) {
 103                 pr_err("Attempt to release alive pfkey socket: %p\n", sk);
 104                 return;
 105         }
 106
 107         WARN_ON(atomic_read(&sk->sk_rmem_alloc));
 108         WARN_ON(refcount_read(&sk->sk_wmem_alloc));
 109
 110         atomic_dec(&net_pfkey->socks_nr);
 111 }
 112
 113 static const struct proto_ops pfkey_ops;
 114
 115 static void pfkey_insert(struct sock *sk)
 116 {
 117         struct net *net = sock_net(sk);
 118         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
 119
 120         mutex_lock(&pfkey_mutex);
 121         sk_add_node_rcu(sk, &net_pfkey->table);
 122         mutex_unlock(&pfkey_mutex);
 123 }
 124
 125 static void pfkey_remove(struct sock *sk)
 126 {
 127         mutex_lock(&pfkey_mutex);
 128         sk_del_node_init_rcu(sk);
 129         mutex_unlock(&pfkey_mutex);
 130 }
 131
 132 static struct proto key_proto = {
 133         .name     = "KEY",
 134         .owner    = THIS_MODULE,
 135         .obj_size = sizeof(struct pfkey_sock),
 136 };
 137
 138 static int pfkey_create(struct net *net, struct socket *sock, int protocol,
 139                         int kern)
 140 {
 141         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
 142         struct sock *sk;
 143         struct pfkey_sock *pfk;
 144
 145         if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
 146                 return -EPERM;
 147         if (sock->type != SOCK_RAW)
 148                 return -ESOCKTNOSUPPORT;
 149         if (protocol != PF_KEY_V2)
 150                 return -EPROTONOSUPPORT;
 151
 152         sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto, kern);
 153         if (sk == NULL)
 154                 return -ENOMEM;
 155
 156         pfk = pfkey_sk(sk);
 157         mutex_init(&pfk->dump_lock);
 158
 159         sock->ops = &pfkey_ops;
 160         sock_init_data(sock, sk);
 161
 162         sk->sk_family = PF_KEY;
 163         sk->sk_destruct = pfkey_sock_destruct;
 164
 165         atomic_inc(&net_pfkey->socks_nr);
 166
 167         pfkey_insert(sk);
 168
 169         return 0;
 170 }
 171
 172 static int pfkey_release(struct socket *sock)
 173 {
 174         struct sock *sk = sock->sk;
 175
 176         if (!sk)
 177                 return 0;
 178
 179         pfkey_remove(sk);
 180
 181         sock_orphan(sk);
 182         sock->sk = NULL;
 183         skb_queue_purge(&sk->sk_write_queue);
 184
 185         synchronize_rcu();
 186         sock_put(sk);
 187
 188         return 0;
 189 }
 190
 191 static int pfkey_broadcast_one(struct sk_buff *skb, gfp_t allocation,
 192                                struct sock *sk)
 193 {
 194         int err = -ENOBUFS;
 195
 196         if (atomic_read(&sk->sk_rmem_alloc) > sk->sk_rcvbuf)
 197                 return err;
 198
 199         skb = skb_clone(skb, allocation);
 200
 201         if (skb) {
 202                 skb_set_owner_r(skb, sk);
 203                 skb_queue_tail(&sk->sk_receive_queue, skb);
 204                 sk->sk_data_ready(sk);
 205                 err = 0;
 206         }
 207         return err;
 208 }
 209
 210 /* Send SKB to all pfkey sockets matching selected criteria.  */
 211 #define BROADCAST_ALL           0
 212 #define BROADCAST_ONE           1
 213 #define BROADCAST_REGISTERED    2
 214 #define BROADCAST_PROMISC_ONLY  4
 215 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
 216                            int broadcast_flags, struct sock *one_sk,
 217                            struct net *net)
 218 {
 219         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
 220         struct sock *sk;
 221         int err = -ESRCH;
 222
 223         /* XXX Do we need something like netlink_overrun?  I think
 224          * XXX PF_KEY socket apps will not mind current behavior.
 225          */
 226         if (!skb)
 227                 return -ENOMEM;
 228
 229         rcu_read_lock();
 230         sk_for_each_rcu(sk, &net_pfkey->table) {
 231                 struct pfkey_sock *pfk = pfkey_sk(sk);
 232                 int err2;
 233
 234                 /* Yes, it means that if you are meant to receive this
 235                  * pfkey message you receive it twice as promiscuous
 236                  * socket.
 237                  */
 238                 if (pfk->promisc)
 239                         pfkey_broadcast_one(skb, GFP_ATOMIC, sk);
 240
 241                 /* the exact target will be processed later */
 242                 if (sk == one_sk)
 243                         continue;
 244                 if (broadcast_flags != BROADCAST_ALL) {
 245                         if (broadcast_flags & BROADCAST_PROMISC_ONLY)
 246                                 continue;
 247                         if ((broadcast_flags & BROADCAST_REGISTERED) &&
 248                             !pfk->registered)
 249                                 continue;
 250                         if (broadcast_flags & BROADCAST_ONE)
 251                                 continue;
 252                 }
 253
 254                 err2 = pfkey_broadcast_one(skb, GFP_ATOMIC, sk);
 255
 256                 /* Error is cleared after successful sending to at least one
 257                  * registered KM */
 258                 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
 259                         err = err2;
 260         }
 261         rcu_read_unlock();
 262
 263         if (one_sk != NULL)
 264                 err = pfkey_broadcast_one(skb, allocation, one_sk);
 265
 266         kfree_skb(skb);
 267         return err;
 268 }
 269
 270 static int pfkey_do_dump(struct pfkey_sock *pfk)
 271 {
 272         struct sadb_msg *hdr;
 273         int rc;
 274
 275         mutex_lock(&pfk->dump_lock);
 276         if (!pfk->dump.dump) {
 277                 rc = 0;
 278                 goto out;
 279         }
 280
 281         rc = pfk->dump.dump(pfk);
 282         if (rc == -ENOBUFS) {
 283                 rc = 0;
 284                 goto out;
 285         }
 286
 287         if (pfk->dump.skb) {
 288                 if (!pfkey_can_dump(&pfk->sk)) {
 289                         rc = 0;
 290                         goto out;
 291                 }
 292
 293                 hdr = (struct sadb_msg *) pfk->dump.skb->data;
 294                 hdr->sadb_msg_seq = 0;
 295                 hdr->sadb_msg_errno = rc;
 296                 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
 297                                 &pfk->sk, sock_net(&pfk->sk));
 298                 pfk->dump.skb = NULL;
 299         }
 300
 301         pfkey_terminate_dump(pfk);
 302
 303 out:
 304         mutex_unlock(&pfk->dump_lock);
 305         return rc;
 306 }
 307
 308 static inline void pfkey_hdr_dup(struct sadb_msg *new,
 309                                  const struct sadb_msg *orig)
 310 {
 311         *new = *orig;
 312 }
 313
 314 static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk)
 315 {
 316         struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
 317         struct sadb_msg *hdr;
 318
 319         if (!skb)
 320                 return -ENOBUFS;
 321
 322         /* Woe be to the platform trying to support PFKEY yet
 323          * having normal errnos outside the 1-255 range, inclusive.
 324          */
 325         err = -err;
 326         if (err == ERESTARTSYS ||
 327             err == ERESTARTNOHAND ||
 328             err == ERESTARTNOINTR)
 329                 err = EINTR;
 330         if (err >= 512)
 331                 err = EINVAL;
 332         BUG_ON(err <= 0 || err >= 256);
 333
 334         hdr = skb_put(skb, sizeof(struct sadb_msg));
 335         pfkey_hdr_dup(hdr, orig);
 336         hdr->sadb_msg_errno = (uint8_t) err;
 337         hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
 338                              sizeof(uint64_t));
 339
 340         pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk));
 341
 342         return 0;
 343 }
 344
 345 static const u8 sadb_ext_min_len[] = {
 346         [SADB_EXT_RESERVED]             = (u8) 0,
 347         [SADB_EXT_SA]                   = (u8) sizeof(struct sadb_sa),
 348         [SADB_EXT_LIFETIME_CURRENT]     = (u8) sizeof(struct sadb_lifetime),
 349         [SADB_EXT_LIFETIME_HARD]        = (u8) sizeof(struct sadb_lifetime),
 350         [SADB_EXT_LIFETIME_SOFT]        = (u8) sizeof(struct sadb_lifetime),
 351         [SADB_EXT_ADDRESS_SRC]          = (u8) sizeof(struct sadb_address),
 352         [SADB_EXT_ADDRESS_DST]          = (u8) sizeof(struct sadb_address),
 353         [SADB_EXT_ADDRESS_PROXY]        = (u8) sizeof(struct sadb_address),
 354         [SADB_EXT_KEY_AUTH]             = (u8) sizeof(struct sadb_key),
 355         [SADB_EXT_KEY_ENCRYPT]          = (u8) sizeof(struct sadb_key),
 356         [SADB_EXT_IDENTITY_SRC]         = (u8) sizeof(struct sadb_ident),
 357         [SADB_EXT_IDENTITY_DST]         = (u8) sizeof(struct sadb_ident),
 358         [SADB_EXT_SENSITIVITY]          = (u8) sizeof(struct sadb_sens),
 359         [SADB_EXT_PROPOSAL]             = (u8) sizeof(struct sadb_prop),
 360         [SADB_EXT_SUPPORTED_AUTH]       = (u8) sizeof(struct sadb_supported),
 361         [SADB_EXT_SUPPORTED_ENCRYPT]    = (u8) sizeof(struct sadb_supported),
 362         [SADB_EXT_SPIRANGE]             = (u8) sizeof(struct sadb_spirange),
 363         [SADB_X_EXT_KMPRIVATE]          = (u8) sizeof(struct sadb_x_kmprivate),
 364         [SADB_X_EXT_POLICY]             = (u8) sizeof(struct sadb_x_policy),
 365         [SADB_X_EXT_SA2]                = (u8) sizeof(struct sadb_x_sa2),
 366         [SADB_X_EXT_NAT_T_TYPE]         = (u8) sizeof(struct sadb_x_nat_t_type),
 367         [SADB_X_EXT_NAT_T_SPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
 368         [SADB_X_EXT_NAT_T_DPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
 369         [SADB_X_EXT_NAT_T_OA]           = (u8) sizeof(struct sadb_address),
 370         [SADB_X_EXT_SEC_CTX]            = (u8) sizeof(struct sadb_x_sec_ctx),
 371         [SADB_X_EXT_KMADDRESS]          = (u8) sizeof(struct sadb_x_kmaddress),
 372         [SADB_X_EXT_FILTER]             = (u8) sizeof(struct sadb_x_filter),
 373 };
 374
 375 /* Verify sadb_address_{len,prefixlen} against sa_family.  */
 376 static int verify_address_len(const void *p)
 377 {
 378         const struct sadb_address *sp = p;
 379         const struct sockaddr *addr = (const struct sockaddr *)(sp + 1);
 380         const struct sockaddr_in *sin;
 381 #if IS_ENABLED(CONFIG_IPV6)
 382         const struct sockaddr_in6 *sin6;
 383 #endif
 384         int len;
 385
 386         if (sp->sadb_address_len <
 387             DIV_ROUND_UP(sizeof(*sp) + offsetofend(typeof(*addr), sa_family),
 388                          sizeof(uint64_t)))
 389                 return -EINVAL;
 390
 391         switch (addr->sa_family) {
 392         case AF_INET:
 393                 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
 394                 if (sp->sadb_address_len != len ||
 395                     sp->sadb_address_prefixlen > 32)
 396                         return -EINVAL;
 397                 break;
 398 #if IS_ENABLED(CONFIG_IPV6)
 399         case AF_INET6:
 400                 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
 401                 if (sp->sadb_address_len != len ||
 402                     sp->sadb_address_prefixlen > 128)
 403                         return -EINVAL;
 404                 break;
 405 #endif
 406         default:
 407                 /* It is user using kernel to keep track of security
 408                  * associations for another protocol, such as
 409                  * OSPF/RSVP/RIPV2/MIP.  It is user's job to verify
 410                  * lengths.
 411                  *
 412                  * XXX Actually, association/policy database is not yet
 413                  * XXX able to cope with arbitrary sockaddr families.
 414                  * XXX When it can, remove this -EINVAL.  -DaveM
 415                  */
 416                 return -EINVAL;
 417         }
 418
 419         return 0;
 420 }
 421
 422 static inline int sadb_key_len(const struct sadb_key *key)
 423 {
 424         int key_bytes = DIV_ROUND_UP(key->sadb_key_bits, 8);
 425
 426         return DIV_ROUND_UP(sizeof(struct sadb_key) + key_bytes,
 427                             sizeof(uint64_t));
 428 }
 429
 430 static int verify_key_len(const void *p)
 431 {
 432         const struct sadb_key *key = p;
 433
 434         if (sadb_key_len(key) > key->sadb_key_len)
 435                 return -EINVAL;
 436
 437         return 0;
 438 }
 439
 440 static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx)
 441 {
 442         return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
 443                             sec_ctx->sadb_x_ctx_len,
 444                             sizeof(uint64_t));
 445 }
 446
 447 static inline int verify_sec_ctx_len(const void *p)
 448 {
 449         const struct sadb_x_sec_ctx *sec_ctx = p;
 450         int len = sec_ctx->sadb_x_ctx_len;
 451
 452         if (len > PAGE_SIZE)
 453                 return -EINVAL;
 454
 455         len = pfkey_sec_ctx_len(sec_ctx);
 456
 457         if (sec_ctx->sadb_x_sec_len != len)
 458                 return -EINVAL;
 459
 460         return 0;
 461 }
 462
 463 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx,
 464                                                                      gfp_t gfp)
 465 {
 466         struct xfrm_user_sec_ctx *uctx = NULL;
 467         int ctx_size = sec_ctx->sadb_x_ctx_len;
 468
 469         uctx = kmalloc((sizeof(*uctx)+ctx_size), gfp);
 470
 471         if (!uctx)
 472                 return NULL;
 473
 474         uctx->len = pfkey_sec_ctx_len(sec_ctx);
 475         uctx->exttype = sec_ctx->sadb_x_sec_exttype;
 476         uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
 477         uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
 478         uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
 479         memcpy(uctx + 1, sec_ctx + 1,
 480                uctx->ctx_len);
 481
 482         return uctx;
 483 }
 484
 485 static int present_and_same_family(const struct sadb_address *src,
 486                                    const struct sadb_address *dst)
 487 {
 488         const struct sockaddr *s_addr, *d_addr;
 489
 490         if (!src || !dst)
 491                 return 0;
 492
 493         s_addr = (const struct sockaddr *)(src + 1);
 494         d_addr = (const struct sockaddr *)(dst + 1);
 495         if (s_addr->sa_family != d_addr->sa_family)
 496                 return 0;
 497         if (s_addr->sa_family != AF_INET
 498 #if IS_ENABLED(CONFIG_IPV6)
 499             && s_addr->sa_family != AF_INET6
 500 #endif
 501                 )
 502                 return 0;
 503
 504         return 1;
 505 }
 506
 507 static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs)
 508 {
 509         const char *p = (char *) hdr;
 510         int len = skb->len;
 511
 512         len -= sizeof(*hdr);
 513         p += sizeof(*hdr);
 514         while (len > 0) {
 515                 const struct sadb_ext *ehdr = (const struct sadb_ext *) p;
 516                 uint16_t ext_type;
 517                 int ext_len;
 518
 519                 if (len < sizeof(*ehdr))
 520                         return -EINVAL;
 521
 522                 ext_len  = ehdr->sadb_ext_len;
 523                 ext_len *= sizeof(uint64_t);
 524                 ext_type = ehdr->sadb_ext_type;
 525                 if (ext_len < sizeof(uint64_t) ||
 526                     ext_len > len ||
 527                     ext_type == SADB_EXT_RESERVED)
 528                         return -EINVAL;
 529
 530                 if (ext_type <= SADB_EXT_MAX) {
 531                         int min = (int) sadb_ext_min_len[ext_type];
 532                         if (ext_len < min)
 533                                 return -EINVAL;
 534                         if (ext_hdrs[ext_type-1] != NULL)
 535                                 return -EINVAL;
 536                         switch (ext_type) {
 537                         case SADB_EXT_ADDRESS_SRC:
 538                         case SADB_EXT_ADDRESS_DST:
 539                         case SADB_EXT_ADDRESS_PROXY:
 540                         case SADB_X_EXT_NAT_T_OA:
 541                                 if (verify_address_len(p))
 542                                         return -EINVAL;
 543                                 break;
 544                         case SADB_X_EXT_SEC_CTX:
 545                                 if (verify_sec_ctx_len(p))
 546                                         return -EINVAL;
 547                                 break;
 548                         case SADB_EXT_KEY_AUTH:
 549                         case SADB_EXT_KEY_ENCRYPT:
 550                                 if (verify_key_len(p))
 551                                         return -EINVAL;
 552                                 break;
 553                         default:
 554                                 break;
 555                         }
 556                         ext_hdrs[ext_type-1] = (void *) p;
 557                 }
 558                 p   += ext_len;
 559                 len -= ext_len;
 560         }
 561
 562         return 0;
 563 }
 564
 565 static uint16_t
 566 pfkey_satype2proto(uint8_t satype)
 567 {
 568         switch (satype) {
 569         case SADB_SATYPE_UNSPEC:
 570                 return IPSEC_PROTO_ANY;
 571         case SADB_SATYPE_AH:
 572                 return IPPROTO_AH;
 573         case SADB_SATYPE_ESP:
 574                 return IPPROTO_ESP;
 575         case SADB_X_SATYPE_IPCOMP:
 576                 return IPPROTO_COMP;
 577         default:
 578                 return 0;
 579         }
 580         /* NOTREACHED */
 581 }
 582
 583 static uint8_t
 584 pfkey_proto2satype(uint16_t proto)
 585 {
 586         switch (proto) {
 587         case IPPROTO_AH:
 588                 return SADB_SATYPE_AH;
 589         case IPPROTO_ESP:
 590                 return SADB_SATYPE_ESP;
 591         case IPPROTO_COMP:
 592                 return SADB_X_SATYPE_IPCOMP;
 593         default:
 594                 return 0;
 595         }
 596         /* NOTREACHED */
 597 }
 598
 599 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
 600  * say specifically 'just raw sockets' as we encode them as 255.
 601  */
 602
 603 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
 604 {
 605         return proto == IPSEC_PROTO_ANY ? 0 : proto;
 606 }
 607
 608 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
 609 {
 610         return proto ? proto : IPSEC_PROTO_ANY;
 611 }
 612
 613 static inline int pfkey_sockaddr_len(sa_family_t family)
 614 {
 615         switch (family) {
 616         case AF_INET:
 617                 return sizeof(struct sockaddr_in);
 618 #if IS_ENABLED(CONFIG_IPV6)
 619         case AF_INET6:
 620                 return sizeof(struct sockaddr_in6);
 621 #endif
 622         }
 623         return 0;
 624 }
 625
 626 static
 627 int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
 628 {
 629         switch (sa->sa_family) {
 630         case AF_INET:
 631                 xaddr->a4 =
 632                         ((struct sockaddr_in *)sa)->sin_addr.s_addr;
 633                 return AF_INET;
 634 #if IS_ENABLED(CONFIG_IPV6)
 635         case AF_INET6:
 636                 memcpy(xaddr->a6,
 637                        &((struct sockaddr_in6 *)sa)->sin6_addr,
 638                        sizeof(struct in6_addr));
 639                 return AF_INET6;
 640 #endif
 641         }
 642         return 0;
 643 }
 644
 645 static
 646 int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr)
 647 {
 648         return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
 649                                       xaddr);
 650 }
 651
 652 static struct  xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs)
 653 {
 654         const struct sadb_sa *sa;
 655         const struct sadb_address *addr;
 656         uint16_t proto;
 657         unsigned short family;
 658         xfrm_address_t *xaddr;
 659
 660         sa = ext_hdrs[SADB_EXT_SA - 1];
 661         if (sa == NULL)
 662                 return NULL;
 663
 664         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
 665         if (proto == 0)
 666                 return NULL;
 667
 668         /* sadb_address_len should be checked by caller */
 669         addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
 670         if (addr == NULL)
 671                 return NULL;
 672
 673         family = ((const struct sockaddr *)(addr + 1))->sa_family;
 674         switch (family) {
 675         case AF_INET:
 676                 xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr;
 677                 break;
 678 #if IS_ENABLED(CONFIG_IPV6)
 679         case AF_INET6:
 680                 xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr;
 681                 break;
 682 #endif
 683         default:
 684                 xaddr = NULL;
 685         }
 686
 687         if (!xaddr)
 688                 return NULL;
 689
 690         return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family);
 691 }
 692
 693 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
 694
 695 static int
 696 pfkey_sockaddr_size(sa_family_t family)
 697 {
 698         return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
 699 }
 700
 701 static inline int pfkey_mode_from_xfrm(int mode)
 702 {
 703         switch(mode) {
 704         case XFRM_MODE_TRANSPORT:
 705                 return IPSEC_MODE_TRANSPORT;
 706         case XFRM_MODE_TUNNEL:
 707                 return IPSEC_MODE_TUNNEL;
 708         case XFRM_MODE_BEET:
 709                 return IPSEC_MODE_BEET;
 710         default:
 711                 return -1;
 712         }
 713 }
 714
 715 static inline int pfkey_mode_to_xfrm(int mode)
 716 {
 717         switch(mode) {
 718         case IPSEC_MODE_ANY:    /*XXX*/
 719         case IPSEC_MODE_TRANSPORT:
 720                 return XFRM_MODE_TRANSPORT;
 721         case IPSEC_MODE_TUNNEL:
 722                 return XFRM_MODE_TUNNEL;
 723         case IPSEC_MODE_BEET:
 724                 return XFRM_MODE_BEET;
 725         default:
 726                 return -1;
 727         }
 728 }
 729
 730 static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port,
 731                                         struct sockaddr *sa,
 732                                         unsigned short family)
 733 {
 734         switch (family) {
 735         case AF_INET:
 736             {
 737                 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 738                 sin->sin_family = AF_INET;
 739                 sin->sin_port = port;
 740                 sin->sin_addr.s_addr = xaddr->a4;
 741                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
 742                 return 32;
 743             }
 744 #if IS_ENABLED(CONFIG_IPV6)
 745         case AF_INET6:
 746             {
 747                 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 748                 sin6->sin6_family = AF_INET6;
 749                 sin6->sin6_port = port;
 750                 sin6->sin6_flowinfo = 0;
 751                 sin6->sin6_addr = xaddr->in6;
 752                 sin6->sin6_scope_id = 0;
 753                 return 128;
 754             }
 755 #endif
 756         }
 757         return 0;
 758 }
 759
 760 static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x,
 761                                               int add_keys, int hsc)
 762 {
 763         struct sk_buff *skb;
 764         struct sadb_msg *hdr;
 765         struct sadb_sa *sa;
 766         struct sadb_lifetime *lifetime;
 767         struct sadb_address *addr;
 768         struct sadb_key *key;
 769         struct sadb_x_sa2 *sa2;
 770         struct sadb_x_sec_ctx *sec_ctx;
 771         struct xfrm_sec_ctx *xfrm_ctx;
 772         int ctx_size = 0;
 773         int size;
 774         int auth_key_size = 0;
 775         int encrypt_key_size = 0;
 776         int sockaddr_size;
 777         struct xfrm_encap_tmpl *natt = NULL;
 778         int mode;
 779
 780         /* address family check */
 781         sockaddr_size = pfkey_sockaddr_size(x->props.family);
 782         if (!sockaddr_size)
 783                 return ERR_PTR(-EINVAL);
 784
 785         /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
 786            key(AE), (identity(SD),) (sensitivity)> */
 787         size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
 788                 sizeof(struct sadb_lifetime) +
 789                 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
 790                 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
 791                         sizeof(struct sadb_address)*2 +
 792                                 sockaddr_size*2 +
 793                                         sizeof(struct sadb_x_sa2);
 794
 795         if ((xfrm_ctx = x->security)) {
 796                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
 797                 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
 798         }
 799
 800         /* identity & sensitivity */
 801         if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family))
 802                 size += sizeof(struct sadb_address) + sockaddr_size;
 803
 804         if (add_keys) {
 805                 if (x->aalg && x->aalg->alg_key_len) {
 806                         auth_key_size =
 807                                 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
 808                         size += sizeof(struct sadb_key) + auth_key_size;
 809                 }
 810                 if (x->ealg && x->ealg->alg_key_len) {
 811                         encrypt_key_size =
 812                                 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
 813                         size += sizeof(struct sadb_key) + encrypt_key_size;
 814                 }
 815         }
 816         if (x->encap)
 817                 natt = x->encap;
 818
 819         if (natt && natt->encap_type) {
 820                 size += sizeof(struct sadb_x_nat_t_type);
 821                 size += sizeof(struct sadb_x_nat_t_port);
 822                 size += sizeof(struct sadb_x_nat_t_port);
 823         }
 824
 825         skb =  alloc_skb(size + 16, GFP_ATOMIC);
 826         if (skb == NULL)
 827                 return ERR_PTR(-ENOBUFS);
 828
 829         /* call should fill header later */
 830         hdr = skb_put(skb, sizeof(struct sadb_msg));
 831         memset(hdr, 0, size);   /* XXX do we need this ? */
 832         hdr->sadb_msg_len = size / sizeof(uint64_t);
 833
 834         /* sa */
 835         sa = skb_put(skb, sizeof(struct sadb_sa));
 836         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
 837         sa->sadb_sa_exttype = SADB_EXT_SA;
 838         sa->sadb_sa_spi = x->id.spi;
 839         sa->sadb_sa_replay = x->props.replay_window;
 840         switch (x->km.state) {
 841         case XFRM_STATE_VALID:
 842                 sa->sadb_sa_state = x->km.dying ?
 843                         SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
 844                 break;
 845         case XFRM_STATE_ACQ:
 846                 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
 847                 break;
 848         default:
 849                 sa->sadb_sa_state = SADB_SASTATE_DEAD;
 850                 break;
 851         }
 852         sa->sadb_sa_auth = 0;
 853         if (x->aalg) {
 854                 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
 855                 sa->sadb_sa_auth = (a && a->pfkey_supported) ?
 856                                         a->desc.sadb_alg_id : 0;
 857         }
 858         sa->sadb_sa_encrypt = 0;
 859         BUG_ON(x->ealg && x->calg);
 860         if (x->ealg) {
 861                 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
 862                 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
 863                                         a->desc.sadb_alg_id : 0;
 864         }
 865         /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
 866         if (x->calg) {
 867                 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
 868                 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
 869                                         a->desc.sadb_alg_id : 0;
 870         }
 871
 872         sa->sadb_sa_flags = 0;
 873         if (x->props.flags & XFRM_STATE_NOECN)
 874                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
 875         if (x->props.flags & XFRM_STATE_DECAP_DSCP)
 876                 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
 877         if (x->props.flags & XFRM_STATE_NOPMTUDISC)
 878                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
 879
 880         /* hard time */
 881         if (hsc & 2) {
 882                 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
 883                 lifetime->sadb_lifetime_len =
 884                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 885                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
 886                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.hard_packet_limit);
 887                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
 888                 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
 889                 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
 890         }
 891         /* soft time */
 892         if (hsc & 1) {
 893                 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
 894                 lifetime->sadb_lifetime_len =
 895                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 896                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
 897                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.soft_packet_limit);
 898                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
 899                 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
 900                 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
 901         }
 902         /* current time */
 903         lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
 904         lifetime->sadb_lifetime_len =
 905                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 906         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
 907         lifetime->sadb_lifetime_allocations = x->curlft.packets;
 908         lifetime->sadb_lifetime_bytes = x->curlft.bytes;
 909         lifetime->sadb_lifetime_addtime = x->curlft.add_time;
 910         lifetime->sadb_lifetime_usetime = x->curlft.use_time;
 911         /* src address */
 912         addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
 913         addr->sadb_address_len =
 914                 (sizeof(struct sadb_address)+sockaddr_size)/
 915                         sizeof(uint64_t);
 916         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
 917         /* "if the ports are non-zero, then the sadb_address_proto field,
 918            normally zero, MUST be filled in with the transport
 919            protocol's number." - RFC2367 */
 920         addr->sadb_address_proto = 0;
 921         addr->sadb_address_reserved = 0;
 922
 923         addr->sadb_address_prefixlen =
 924                 pfkey_sockaddr_fill(&x->props.saddr, 0,
 925                                     (struct sockaddr *) (addr + 1),
 926                                     x->props.family);
 927         BUG_ON(!addr->sadb_address_prefixlen);
 928
 929         /* dst address */
 930         addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
 931         addr->sadb_address_len =
 932                 (sizeof(struct sadb_address)+sockaddr_size)/
 933                         sizeof(uint64_t);
 934         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
 935         addr->sadb_address_proto = 0;
 936         addr->sadb_address_reserved = 0;
 937
 938         addr->sadb_address_prefixlen =
 939                 pfkey_sockaddr_fill(&x->id.daddr, 0,
 940                                     (struct sockaddr *) (addr + 1),
 941                                     x->props.family);
 942         BUG_ON(!addr->sadb_address_prefixlen);
 943
 944         if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr,
 945                              x->props.family)) {
 946                 addr = skb_put(skb,
 947                                sizeof(struct sadb_address) + sockaddr_size);
 948                 addr->sadb_address_len =
 949                         (sizeof(struct sadb_address)+sockaddr_size)/
 950                         sizeof(uint64_t);
 951                 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
 952                 addr->sadb_address_proto =
 953                         pfkey_proto_from_xfrm(x->sel.proto);
 954                 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
 955                 addr->sadb_address_reserved = 0;
 956
 957                 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
 958                                     (struct sockaddr *) (addr + 1),
 959                                     x->props.family);
 960         }
 961
 962         /* auth key */
 963         if (add_keys && auth_key_size) {
 964                 key = skb_put(skb, sizeof(struct sadb_key) + auth_key_size);
 965                 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
 966                         sizeof(uint64_t);
 967                 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
 968                 key->sadb_key_bits = x->aalg->alg_key_len;
 969                 key->sadb_key_reserved = 0;
 970                 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
 971         }
 972         /* encrypt key */
 973         if (add_keys && encrypt_key_size) {
 974                 key = skb_put(skb, sizeof(struct sadb_key) + encrypt_key_size);
 975                 key->sadb_key_len = (sizeof(struct sadb_key) +
 976                                      encrypt_key_size) / sizeof(uint64_t);
 977                 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
 978                 key->sadb_key_bits = x->ealg->alg_key_len;
 979                 key->sadb_key_reserved = 0;
 980                 memcpy(key + 1, x->ealg->alg_key,
 981                        (x->ealg->alg_key_len+7)/8);
 982         }
 983
 984         /* sa */
 985         sa2 = skb_put(skb, sizeof(struct sadb_x_sa2));
 986         sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
 987         sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
 988         if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
 989                 kfree_skb(skb);
 990                 return ERR_PTR(-EINVAL);
 991         }
 992         sa2->sadb_x_sa2_mode = mode;
 993         sa2->sadb_x_sa2_reserved1 = 0;
 994         sa2->sadb_x_sa2_reserved2 = 0;
 995         sa2->sadb_x_sa2_sequence = 0;
 996         sa2->sadb_x_sa2_reqid = x->props.reqid;
 997
 998         if (natt && natt->encap_type) {
 999                 struct sadb_x_nat_t_type *n_type;
1000                 struct sadb_x_nat_t_port *n_port;
1001
1002                 /* type */
1003                 n_type = skb_put(skb, sizeof(*n_type));
1004                 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
1005                 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
1006                 n_type->sadb_x_nat_t_type_type = natt->encap_type;
1007                 n_type->sadb_x_nat_t_type_reserved[0] = 0;
1008                 n_type->sadb_x_nat_t_type_reserved[1] = 0;
1009                 n_type->sadb_x_nat_t_type_reserved[2] = 0;
1010
1011                 /* source port */
1012                 n_port = skb_put(skb, sizeof(*n_port));
1013                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1014                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
1015                 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
1016                 n_port->sadb_x_nat_t_port_reserved = 0;
1017
1018                 /* dest port */
1019                 n_port = skb_put(skb, sizeof(*n_port));
1020                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1021                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
1022                 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
1023                 n_port->sadb_x_nat_t_port_reserved = 0;
1024         }
1025
1026         /* security context */
1027         if (xfrm_ctx) {
1028                 sec_ctx = skb_put(skb,
1029                                   sizeof(struct sadb_x_sec_ctx) + ctx_size);
1030                 sec_ctx->sadb_x_sec_len =
1031                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1032                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1033                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1034                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1035                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1036                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1037                        xfrm_ctx->ctx_len);
1038         }
1039
1040         return skb;
1041 }
1042
1043
1044 static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x)
1045 {
1046         struct sk_buff *skb;
1047
1048         skb = __pfkey_xfrm_state2msg(x, 1, 3);
1049
1050         return skb;
1051 }
1052
1053 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x,
1054                                                           int hsc)
1055 {
1056         return __pfkey_xfrm_state2msg(x, 0, hsc);
1057 }
1058
1059 static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
1060                                                 const struct sadb_msg *hdr,
1061                                                 void * const *ext_hdrs)
1062 {
1063         struct xfrm_state *x;
1064         const struct sadb_lifetime *lifetime;
1065         const struct sadb_sa *sa;
1066         const struct sadb_key *key;
1067         const struct sadb_x_sec_ctx *sec_ctx;
1068         uint16_t proto;
1069         int err;
1070
1071
1072         sa = ext_hdrs[SADB_EXT_SA - 1];
1073         if (!sa ||
1074             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1075                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1076                 return ERR_PTR(-EINVAL);
1077         if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1078             !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1079                 return ERR_PTR(-EINVAL);
1080         if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1081             !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1082                 return ERR_PTR(-EINVAL);
1083         if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1084             !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1085                 return ERR_PTR(-EINVAL);
1086
1087         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1088         if (proto == 0)
1089                 return ERR_PTR(-EINVAL);
1090
1091         /* default error is no buffer space */
1092         err = -ENOBUFS;
1093
1094         /* RFC2367:
1095
1096    Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1097    SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1098    sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1099    Therefore, the sadb_sa_state field of all submitted SAs MUST be
1100    SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1101    not true.
1102
1103            However, KAME setkey always uses SADB_SASTATE_LARVAL.
1104            Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1105          */
1106         if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1107             (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1108              sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1109             sa->sadb_sa_encrypt > SADB_EALG_MAX)
1110                 return ERR_PTR(-EINVAL);
1111         key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1112         if (key != NULL &&
1113             sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1114             key->sadb_key_bits == 0)
1115                 return ERR_PTR(-EINVAL);
1116         key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1117         if (key != NULL &&
1118             sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1119             key->sadb_key_bits == 0)
1120                 return ERR_PTR(-EINVAL);
1121
1122         x = xfrm_state_alloc(net);
1123         if (x == NULL)
1124                 return ERR_PTR(-ENOBUFS);
1125
1126         x->id.proto = proto;
1127         x->id.spi = sa->sadb_sa_spi;
1128         x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay,
1129                                         (sizeof(x->replay.bitmap) * 8));
1130         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1131                 x->props.flags |= XFRM_STATE_NOECN;
1132         if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1133                 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1134         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1135                 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1136
1137         lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1];
1138         if (lifetime != NULL) {
1139                 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1140                 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1141                 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1142                 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1143         }
1144         lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1];
1145         if (lifetime != NULL) {
1146                 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1147                 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1148                 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1149                 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1150         }
1151
1152         sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
1153         if (sec_ctx != NULL) {
1154                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
1155
1156                 if (!uctx)
1157                         goto out;
1158
1159                 err = security_xfrm_state_alloc(x, uctx);
1160                 kfree(uctx);
1161
1162                 if (err)
1163                         goto out;
1164         }
1165
1166         err = -ENOBUFS;
1167         key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1168         if (sa->sadb_sa_auth) {
1169                 int keysize = 0;
1170                 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1171                 if (!a || !a->pfkey_supported) {
1172                         err = -ENOSYS;
1173                         goto out;
1174                 }
1175                 if (key)
1176                         keysize = (key->sadb_key_bits + 7) / 8;
1177                 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1178                 if (!x->aalg) {
1179                         err = -ENOMEM;
1180                         goto out;
1181                 }
1182                 strcpy(x->aalg->alg_name, a->name);
1183                 x->aalg->alg_key_len = 0;
1184                 if (key) {
1185                         x->aalg->alg_key_len = key->sadb_key_bits;
1186                         memcpy(x->aalg->alg_key, key+1, keysize);
1187                 }
1188                 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1189                 x->props.aalgo = sa->sadb_sa_auth;
1190                 /* x->algo.flags = sa->sadb_sa_flags; */
1191         }
1192         if (sa->sadb_sa_encrypt) {
1193                 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1194                         struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1195                         if (!a || !a->pfkey_supported) {
1196                                 err = -ENOSYS;
1197                                 goto out;
1198                         }
1199                         x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1200                         if (!x->calg) {
1201                                 err = -ENOMEM;
1202                                 goto out;
1203                         }
1204                         strcpy(x->calg->alg_name, a->name);
1205                         x->props.calgo = sa->sadb_sa_encrypt;
1206                 } else {
1207                         int keysize = 0;
1208                         struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1209                         if (!a || !a->pfkey_supported) {
1210                                 err = -ENOSYS;
1211                                 goto out;
1212                         }
1213                         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1214                         if (key)
1215                                 keysize = (key->sadb_key_bits + 7) / 8;
1216                         x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1217                         if (!x->ealg) {
1218                                 err = -ENOMEM;
1219                                 goto out;
1220                         }
1221                         strcpy(x->ealg->alg_name, a->name);
1222                         x->ealg->alg_key_len = 0;
1223                         if (key) {
1224                                 x->ealg->alg_key_len = key->sadb_key_bits;
1225                                 memcpy(x->ealg->alg_key, key+1, keysize);
1226                         }
1227                         x->props.ealgo = sa->sadb_sa_encrypt;
1228                         x->geniv = a->uinfo.encr.geniv;
1229                 }
1230         }
1231         /* x->algo.flags = sa->sadb_sa_flags; */
1232
1233         x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1234                                                     &x->props.saddr);
1235         pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1236                                   &x->id.daddr);
1237
1238         if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1239                 const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
1240                 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1241                 if (mode < 0) {
1242                         err = -EINVAL;
1243                         goto out;
1244                 }
1245                 x->props.mode = mode;
1246                 x->props.reqid = sa2->sadb_x_sa2_reqid;
1247         }
1248
1249         if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1250                 const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1251
1252                 /* Nobody uses this, but we try. */
1253                 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1254                 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1255         }
1256
1257         if (!x->sel.family)
1258                 x->sel.family = x->props.family;
1259
1260         if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1261                 const struct sadb_x_nat_t_type* n_type;
1262                 struct xfrm_encap_tmpl *natt;
1263
1264                 x->encap = kzalloc(sizeof(*x->encap), GFP_KERNEL);
1265                 if (!x->encap) {
1266                         err = -ENOMEM;
1267                         goto out;
1268                 }
1269
1270                 natt = x->encap;
1271                 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1272                 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1273
1274                 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1275                         const struct sadb_x_nat_t_port *n_port =
1276                                 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1277                         natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1278                 }
1279                 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1280                         const struct sadb_x_nat_t_port *n_port =
1281                                 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1282                         natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1283                 }
1284         }
1285
1286         err = xfrm_init_state(x);
1287         if (err)
1288                 goto out;
1289
1290         x->km.seq = hdr->sadb_msg_seq;
1291         return x;
1292
1293 out:
1294         x->km.state = XFRM_STATE_DEAD;
1295         xfrm_state_put(x);
1296         return ERR_PTR(err);
1297 }
1298
1299 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1300 {
1301         return -EOPNOTSUPP;
1302 }
1303
1304 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1305 {
1306         struct net *net = sock_net(sk);
1307         struct sk_buff *resp_skb;
1308         struct sadb_x_sa2 *sa2;
1309         struct sadb_address *saddr, *daddr;
1310         struct sadb_msg *out_hdr;
1311         struct sadb_spirange *range;
1312         struct xfrm_state *x = NULL;
1313         int mode;
1314         int err;
1315         u32 min_spi, max_spi;
1316         u32 reqid;
1317         u8 proto;
1318         unsigned short family;
1319         xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1320
1321         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1322                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1323                 return -EINVAL;
1324
1325         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1326         if (proto == 0)
1327                 return -EINVAL;
1328
1329         if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1330                 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1331                 if (mode < 0)
1332                         return -EINVAL;
1333                 reqid = sa2->sadb_x_sa2_reqid;
1334         } else {
1335                 mode = 0;
1336                 reqid = 0;
1337         }
1338
1339         saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1340         daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1341
1342         family = ((struct sockaddr *)(saddr + 1))->sa_family;
1343         switch (family) {
1344         case AF_INET:
1345                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1346                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1347                 break;
1348 #if IS_ENABLED(CONFIG_IPV6)
1349         case AF_INET6:
1350                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1351                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1352                 break;
1353 #endif
1354         }
1355
1356         if (hdr->sadb_msg_seq) {
1357                 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1358                 if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) {
1359                         xfrm_state_put(x);
1360                         x = NULL;
1361                 }
1362         }
1363
1364         if (!x)
1365                 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, 0, proto, xdaddr, xsaddr, 1, family);
1366
1367         if (x == NULL)
1368                 return -ENOENT;
1369
1370         min_spi = 0x100;
1371         max_spi = 0x0fffffff;
1372
1373         range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1374         if (range) {
1375                 min_spi = range->sadb_spirange_min;
1376                 max_spi = range->sadb_spirange_max;
1377         }
1378
1379         err = verify_spi_info(x->id.proto, min_spi, max_spi, NULL);
1380         if (err) {
1381                 xfrm_state_put(x);
1382                 return err;
1383         }
1384
1385         err = xfrm_alloc_spi(x, min_spi, max_spi, NULL);
1386         resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1387
1388         if (IS_ERR(resp_skb)) {
1389                 xfrm_state_put(x);
1390                 return  PTR_ERR(resp_skb);
1391         }
1392
1393         out_hdr = (struct sadb_msg *) resp_skb->data;
1394         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1395         out_hdr->sadb_msg_type = SADB_GETSPI;
1396         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1397         out_hdr->sadb_msg_errno = 0;
1398         out_hdr->sadb_msg_reserved = 0;
1399         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1400         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1401
1402         xfrm_state_put(x);
1403
1404         pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
1405
1406         return 0;
1407 }
1408
1409 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1410 {
1411         struct net *net = sock_net(sk);
1412         struct xfrm_state *x;
1413
1414         if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1415                 return -EOPNOTSUPP;
1416
1417         if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1418                 return 0;
1419
1420         x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1421         if (x == NULL)
1422                 return 0;
1423
1424         spin_lock_bh(&x->lock);
1425         if (x->km.state == XFRM_STATE_ACQ)
1426                 x->km.state = XFRM_STATE_ERROR;
1427
1428         spin_unlock_bh(&x->lock);
1429         xfrm_state_put(x);
1430         return 0;
1431 }
1432
1433 static inline int event2poltype(int event)
1434 {
1435         switch (event) {
1436         case XFRM_MSG_DELPOLICY:
1437                 return SADB_X_SPDDELETE;
1438         case XFRM_MSG_NEWPOLICY:
1439                 return SADB_X_SPDADD;
1440         case XFRM_MSG_UPDPOLICY:
1441                 return SADB_X_SPDUPDATE;
1442         case XFRM_MSG_POLEXPIRE:
1443         //      return SADB_X_SPDEXPIRE;
1444         default:
1445                 pr_err("pfkey: Unknown policy event %d\n", event);
1446                 break;
1447         }
1448
1449         return 0;
1450 }
1451
1452 static inline int event2keytype(int event)
1453 {
1454         switch (event) {
1455         case XFRM_MSG_DELSA:
1456                 return SADB_DELETE;
1457         case XFRM_MSG_NEWSA:
1458                 return SADB_ADD;
1459         case XFRM_MSG_UPDSA:
1460                 return SADB_UPDATE;
1461         case XFRM_MSG_EXPIRE:
1462                 return SADB_EXPIRE;
1463         default:
1464                 pr_err("pfkey: Unknown SA event %d\n", event);
1465                 break;
1466         }
1467
1468         return 0;
1469 }
1470
1471 /* ADD/UPD/DEL */
1472 static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
1473 {
1474         struct sk_buff *skb;
1475         struct sadb_msg *hdr;
1476
1477         skb = pfkey_xfrm_state2msg(x);
1478
1479         if (IS_ERR(skb))
1480                 return PTR_ERR(skb);
1481
1482         hdr = (struct sadb_msg *) skb->data;
1483         hdr->sadb_msg_version = PF_KEY_V2;
1484         hdr->sadb_msg_type = event2keytype(c->event);
1485         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1486         hdr->sadb_msg_errno = 0;
1487         hdr->sadb_msg_reserved = 0;
1488         hdr->sadb_msg_seq = c->seq;
1489         hdr->sadb_msg_pid = c->portid;
1490
1491         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
1492
1493         return 0;
1494 }
1495
1496 static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1497 {
1498         struct net *net = sock_net(sk);
1499         struct xfrm_state *x;
1500         int err;
1501         struct km_event c;
1502
1503         x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1504         if (IS_ERR(x))
1505                 return PTR_ERR(x);
1506
1507         xfrm_state_hold(x);
1508         if (hdr->sadb_msg_type == SADB_ADD)
1509                 err = xfrm_state_add(x);
1510         else
1511                 err = xfrm_state_update(x);
1512
1513         xfrm_audit_state_add(x, err ? 0 : 1, true);
1514
1515         if (err < 0) {
1516                 x->km.state = XFRM_STATE_DEAD;
1517                 __xfrm_state_put(x);
1518                 goto out;
1519         }
1520
1521         if (hdr->sadb_msg_type == SADB_ADD)
1522                 c.event = XFRM_MSG_NEWSA;
1523         else
1524                 c.event = XFRM_MSG_UPDSA;
1525         c.seq = hdr->sadb_msg_seq;
1526         c.portid = hdr->sadb_msg_pid;
1527         km_state_notify(x, &c);
1528 out:
1529         xfrm_state_put(x);
1530         return err;
1531 }
1532
1533 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1534 {
1535         struct net *net = sock_net(sk);
1536         struct xfrm_state *x;
1537         struct km_event c;
1538         int err;
1539
1540         if (!ext_hdrs[SADB_EXT_SA-1] ||
1541             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1542                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1543                 return -EINVAL;
1544
1545         x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1546         if (x == NULL)
1547                 return -ESRCH;
1548
1549         if ((err = security_xfrm_state_delete(x)))
1550                 goto out;
1551
1552         if (xfrm_state_kern(x)) {
1553                 err = -EPERM;
1554                 goto out;
1555         }
1556
1557         err = xfrm_state_delete(x);
1558
1559         if (err < 0)
1560                 goto out;
1561
1562         c.seq = hdr->sadb_msg_seq;
1563         c.portid = hdr->sadb_msg_pid;
1564         c.event = XFRM_MSG_DELSA;
1565         km_state_notify(x, &c);
1566 out:
1567         xfrm_audit_state_delete(x, err ? 0 : 1, true);
1568         xfrm_state_put(x);
1569
1570         return err;
1571 }
1572
1573 static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1574 {
1575         struct net *net = sock_net(sk);
1576         __u8 proto;
1577         struct sk_buff *out_skb;
1578         struct sadb_msg *out_hdr;
1579         struct xfrm_state *x;
1580
1581         if (!ext_hdrs[SADB_EXT_SA-1] ||
1582             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1583                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1584                 return -EINVAL;
1585
1586         x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1587         if (x == NULL)
1588                 return -ESRCH;
1589
1590         out_skb = pfkey_xfrm_state2msg(x);
1591         proto = x->id.proto;
1592         xfrm_state_put(x);
1593         if (IS_ERR(out_skb))
1594                 return  PTR_ERR(out_skb);
1595
1596         out_hdr = (struct sadb_msg *) out_skb->data;
1597         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1598         out_hdr->sadb_msg_type = SADB_GET;
1599         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1600         out_hdr->sadb_msg_errno = 0;
1601         out_hdr->sadb_msg_reserved = 0;
1602         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1603         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1604         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1605
1606         return 0;
1607 }
1608
1609 static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
1610                                               gfp_t allocation)
1611 {
1612         struct sk_buff *skb;
1613         struct sadb_msg *hdr;
1614         int len, auth_len, enc_len, i;
1615
1616         auth_len = xfrm_count_pfkey_auth_supported();
1617         if (auth_len) {
1618                 auth_len *= sizeof(struct sadb_alg);
1619                 auth_len += sizeof(struct sadb_supported);
1620         }
1621
1622         enc_len = xfrm_count_pfkey_enc_supported();
1623         if (enc_len) {
1624                 enc_len *= sizeof(struct sadb_alg);
1625                 enc_len += sizeof(struct sadb_supported);
1626         }
1627
1628         len = enc_len + auth_len + sizeof(struct sadb_msg);
1629
1630         skb = alloc_skb(len + 16, allocation);
1631         if (!skb)
1632                 goto out_put_algs;
1633
1634         hdr = skb_put(skb, sizeof(*hdr));
1635         pfkey_hdr_dup(hdr, orig);
1636         hdr->sadb_msg_errno = 0;
1637         hdr->sadb_msg_len = len / sizeof(uint64_t);
1638
1639         if (auth_len) {
1640                 struct sadb_supported *sp;
1641                 struct sadb_alg *ap;
1642
1643                 sp = skb_put(skb, auth_len);
1644                 ap = (struct sadb_alg *) (sp + 1);
1645
1646                 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1647                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1648
1649                 for (i = 0; ; i++) {
1650                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1651                         if (!aalg)
1652                                 break;
1653                         if (!aalg->pfkey_supported)
1654                                 continue;
1655                         if (aalg->available)
1656                                 *ap++ = aalg->desc;
1657                 }
1658         }
1659
1660         if (enc_len) {
1661                 struct sadb_supported *sp;
1662                 struct sadb_alg *ap;
1663
1664                 sp = skb_put(skb, enc_len);
1665                 ap = (struct sadb_alg *) (sp + 1);
1666
1667                 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1668                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1669
1670                 for (i = 0; ; i++) {
1671                         struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1672                         if (!ealg)
1673                                 break;
1674                         if (!ealg->pfkey_supported)
1675                                 continue;
1676                         if (ealg->available)
1677                                 *ap++ = ealg->desc;
1678                 }
1679         }
1680
1681 out_put_algs:
1682         return skb;
1683 }
1684
1685 static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1686 {
1687         struct pfkey_sock *pfk = pfkey_sk(sk);
1688         struct sk_buff *supp_skb;
1689
1690         if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1691                 return -EINVAL;
1692
1693         if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1694                 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1695                         return -EEXIST;
1696                 pfk->registered |= (1<<hdr->sadb_msg_satype);
1697         }
1698
1699         mutex_lock(&pfkey_mutex);
1700         xfrm_probe_algs();
1701
1702         supp_skb = compose_sadb_supported(hdr, GFP_KERNEL | __GFP_ZERO);
1703         mutex_unlock(&pfkey_mutex);
1704
1705         if (!supp_skb) {
1706                 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1707                         pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1708
1709                 return -ENOBUFS;
1710         }
1711
1712         pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk,
1713                         sock_net(sk));
1714         return 0;
1715 }
1716
1717 static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
1718 {
1719         struct sk_buff *skb;
1720         struct sadb_msg *hdr;
1721
1722         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1723         if (!skb)
1724                 return -ENOBUFS;
1725
1726         hdr = skb_put_data(skb, ihdr, sizeof(struct sadb_msg));
1727         hdr->sadb_msg_errno = (uint8_t) 0;
1728         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1729
1730         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk,
1731                                sock_net(sk));
1732 }
1733
1734 static int key_notify_sa_flush(const struct km_event *c)
1735 {
1736         struct sk_buff *skb;
1737         struct sadb_msg *hdr;
1738
1739         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1740         if (!skb)
1741                 return -ENOBUFS;
1742         hdr = skb_put(skb, sizeof(struct sadb_msg));
1743         hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1744         hdr->sadb_msg_type = SADB_FLUSH;
1745         hdr->sadb_msg_seq = c->seq;
1746         hdr->sadb_msg_pid = c->portid;
1747         hdr->sadb_msg_version = PF_KEY_V2;
1748         hdr->sadb_msg_errno = (uint8_t) 0;
1749         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1750         hdr->sadb_msg_reserved = 0;
1751
1752         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
1753
1754         return 0;
1755 }
1756
1757 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1758 {
1759         struct net *net = sock_net(sk);
1760         unsigned int proto;
1761         struct km_event c;
1762         int err, err2;
1763
1764         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1765         if (proto == 0)
1766                 return -EINVAL;
1767
1768         err = xfrm_state_flush(net, proto, true, false);
1769         err2 = unicast_flush_resp(sk, hdr);
1770         if (err || err2) {
1771                 if (err == -ESRCH) /* empty table - go quietly */
1772                         err = 0;
1773                 return err ? err : err2;
1774         }
1775
1776         c.data.proto = proto;
1777         c.seq = hdr->sadb_msg_seq;
1778         c.portid = hdr->sadb_msg_pid;
1779         c.event = XFRM_MSG_FLUSHSA;
1780         c.net = net;
1781         km_state_notify(NULL, &c);
1782
1783         return 0;
1784 }
1785
1786 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1787 {
1788         struct pfkey_sock *pfk = ptr;
1789         struct sk_buff *out_skb;
1790         struct sadb_msg *out_hdr;
1791
1792         if (!pfkey_can_dump(&pfk->sk))
1793                 return -ENOBUFS;
1794
1795         out_skb = pfkey_xfrm_state2msg(x);
1796         if (IS_ERR(out_skb))
1797                 return PTR_ERR(out_skb);
1798
1799         out_hdr = (struct sadb_msg *) out_skb->data;
1800         out_hdr->sadb_msg_version = pfk->dump.msg_version;
1801         out_hdr->sadb_msg_type = SADB_DUMP;
1802         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1803         out_hdr->sadb_msg_errno = 0;
1804         out_hdr->sadb_msg_reserved = 0;
1805         out_hdr->sadb_msg_seq = count + 1;
1806         out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
1807
1808         if (pfk->dump.skb)
1809                 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
1810                                 &pfk->sk, sock_net(&pfk->sk));
1811         pfk->dump.skb = out_skb;
1812
1813         return 0;
1814 }
1815
1816 static int pfkey_dump_sa(struct pfkey_sock *pfk)
1817 {
1818         struct net *net = sock_net(&pfk->sk);
1819         return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1820 }
1821
1822 static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1823 {
1824         struct net *net = sock_net(&pfk->sk);
1825
1826         xfrm_state_walk_done(&pfk->dump.u.state, net);
1827 }
1828
1829 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1830 {
1831         u8 proto;
1832         struct xfrm_address_filter *filter = NULL;
1833         struct pfkey_sock *pfk = pfkey_sk(sk);
1834
1835         mutex_lock(&pfk->dump_lock);
1836         if (pfk->dump.dump != NULL) {
1837                 mutex_unlock(&pfk->dump_lock);
1838                 return -EBUSY;
1839         }
1840
1841         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1842         if (proto == 0) {
1843                 mutex_unlock(&pfk->dump_lock);
1844                 return -EINVAL;
1845         }
1846
1847         if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
1848                 struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
1849
1850                 if ((xfilter->sadb_x_filter_splen >
1851                         (sizeof(xfrm_address_t) << 3)) ||
1852                     (xfilter->sadb_x_filter_dplen >
1853                         (sizeof(xfrm_address_t) << 3))) {
1854                         mutex_unlock(&pfk->dump_lock);
1855                         return -EINVAL;
1856                 }
1857                 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
1858                 if (filter == NULL) {
1859                         mutex_unlock(&pfk->dump_lock);
1860                         return -ENOMEM;
1861                 }
1862
1863                 memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr,
1864                        sizeof(xfrm_address_t));
1865                 memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr,
1866                        sizeof(xfrm_address_t));
1867                 filter->family = xfilter->sadb_x_filter_family;
1868                 filter->splen = xfilter->sadb_x_filter_splen;
1869                 filter->dplen = xfilter->sadb_x_filter_dplen;
1870         }
1871
1872         pfk->dump.msg_version = hdr->sadb_msg_version;
1873         pfk->dump.msg_portid = hdr->sadb_msg_pid;
1874         pfk->dump.dump = pfkey_dump_sa;
1875         pfk->dump.done = pfkey_dump_sa_done;
1876         xfrm_state_walk_init(&pfk->dump.u.state, proto, filter);
1877         mutex_unlock(&pfk->dump_lock);
1878
1879         return pfkey_do_dump(pfk);
1880 }
1881
1882 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1883 {
1884         struct pfkey_sock *pfk = pfkey_sk(sk);
1885         int satype = hdr->sadb_msg_satype;
1886         bool reset_errno = false;
1887
1888         if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1889                 reset_errno = true;
1890                 if (satype != 0 && satype != 1)
1891                         return -EINVAL;
1892                 pfk->promisc = satype;
1893         }
1894         if (reset_errno && skb_cloned(skb))
1895                 skb = skb_copy(skb, GFP_KERNEL);
1896         else
1897                 skb = skb_clone(skb, GFP_KERNEL);
1898
1899         if (reset_errno && skb) {
1900                 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1901                 new_hdr->sadb_msg_errno = 0;
1902         }
1903
1904         pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
1905         return 0;
1906 }
1907
1908 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1909 {
1910         int i;
1911         u32 reqid = *(u32*)ptr;
1912
1913         for (i=0; i<xp->xfrm_nr; i++) {
1914                 if (xp->xfrm_vec[i].reqid == reqid)
1915                         return -EEXIST;
1916         }
1917         return 0;
1918 }
1919
1920 static u32 gen_reqid(struct net *net)
1921 {
1922         struct xfrm_policy_walk walk;
1923         u32 start;
1924         int rc;
1925         static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1926
1927         start = reqid;
1928         do {
1929                 ++reqid;
1930                 if (reqid == 0)
1931                         reqid = IPSEC_MANUAL_REQID_MAX+1;
1932                 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1933                 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1934                 xfrm_policy_walk_done(&walk, net);
1935                 if (rc != -EEXIST)
1936                         return reqid;
1937         } while (reqid != start);
1938         return 0;
1939 }
1940
1941 static int
1942 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_policy *pol,
1943                    struct sadb_x_ipsecrequest *rq)
1944 {
1945         struct net *net = xp_net(xp);
1946         struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1947         int mode;
1948
1949         if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1950                 return -ELOOP;
1951
1952         if (rq->sadb_x_ipsecrequest_mode == 0)
1953                 return -EINVAL;
1954         if (!xfrm_id_proto_valid(rq->sadb_x_ipsecrequest_proto))
1955                 return -EINVAL;
1956
1957         t->id.proto = rq->sadb_x_ipsecrequest_proto;
1958         if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1959                 return -EINVAL;
1960         t->mode = mode;
1961         if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) {
1962                 if ((mode == XFRM_MODE_TUNNEL || mode == XFRM_MODE_BEET) &&
1963                     pol->sadb_x_policy_dir == IPSEC_DIR_OUTBOUND)
1964                         return -EINVAL;
1965                 t->optional = 1;
1966         } else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1967                 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1968                 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1969                         t->reqid = 0;
1970                 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1971                         return -ENOBUFS;
1972         }
1973
1974         /* addresses present only in tunnel mode */
1975         if (t->mode == XFRM_MODE_TUNNEL) {
1976                 int err;
1977
1978                 err = parse_sockaddr_pair(
1979                         (struct sockaddr *)(rq + 1),
1980                         rq->sadb_x_ipsecrequest_len - sizeof(*rq),
1981                         &t->saddr, &t->id.daddr, &t->encap_family);
1982                 if (err)
1983                         return err;
1984         } else
1985                 t->encap_family = xp->family;
1986
1987         /* No way to set this via kame pfkey */
1988         t->allalgs = 1;
1989         xp->xfrm_nr++;
1990         return 0;
1991 }
1992
1993 static int
1994 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1995 {
1996         int err;
1997         int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1998         struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1999
2000         if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
2001                 return -EINVAL;
2002
2003         while (len >= sizeof(*rq)) {
2004                 if (len < rq->sadb_x_ipsecrequest_len ||
2005                     rq->sadb_x_ipsecrequest_len < sizeof(*rq))
2006                         return -EINVAL;
2007
2008                 if ((err = parse_ipsecrequest(xp, pol, rq)) < 0)
2009                         return err;
2010                 len -= rq->sadb_x_ipsecrequest_len;
2011                 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
2012         }
2013         return 0;
2014 }
2015
2016 static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
2017 {
2018         struct xfrm_sec_ctx *xfrm_ctx = xp->security;
2019
2020         if (xfrm_ctx) {
2021                 int len = sizeof(struct sadb_x_sec_ctx);
2022                 len += xfrm_ctx->ctx_len;
2023                 return PFKEY_ALIGN8(len);
2024         }
2025         return 0;
2026 }
2027
2028 static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
2029 {
2030         const struct xfrm_tmpl *t;
2031         int sockaddr_size = pfkey_sockaddr_size(xp->family);
2032         int socklen = 0;
2033         int i;
2034
2035         for (i=0; i<xp->xfrm_nr; i++) {
2036                 t = xp->xfrm_vec + i;
2037                 socklen += pfkey_sockaddr_len(t->encap_family);
2038         }
2039
2040         return sizeof(struct sadb_msg) +
2041                 (sizeof(struct sadb_lifetime) * 3) +
2042                 (sizeof(struct sadb_address) * 2) +
2043                 (sockaddr_size * 2) +
2044                 sizeof(struct sadb_x_policy) +
2045                 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
2046                 (socklen * 2) +
2047                 pfkey_xfrm_policy2sec_ctx_size(xp);
2048 }
2049
2050 static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
2051 {
2052         struct sk_buff *skb;
2053         int size;
2054
2055         size = pfkey_xfrm_policy2msg_size(xp);
2056
2057         skb =  alloc_skb(size + 16, GFP_ATOMIC);
2058         if (skb == NULL)
2059                 return ERR_PTR(-ENOBUFS);
2060
2061         return skb;
2062 }
2063
2064 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
2065 {
2066         struct sadb_msg *hdr;
2067         struct sadb_address *addr;
2068         struct sadb_lifetime *lifetime;
2069         struct sadb_x_policy *pol;
2070         struct sadb_x_sec_ctx *sec_ctx;
2071         struct xfrm_sec_ctx *xfrm_ctx;
2072         int i;
2073         int size;
2074         int sockaddr_size = pfkey_sockaddr_size(xp->family);
2075         int socklen = pfkey_sockaddr_len(xp->family);
2076
2077         size = pfkey_xfrm_policy2msg_size(xp);
2078
2079         /* call should fill header later */
2080         hdr = skb_put(skb, sizeof(struct sadb_msg));
2081         memset(hdr, 0, size);   /* XXX do we need this ? */
2082
2083         /* src address */
2084         addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
2085         addr->sadb_address_len =
2086                 (sizeof(struct sadb_address)+sockaddr_size)/
2087                         sizeof(uint64_t);
2088         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2089         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2090         addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2091         addr->sadb_address_reserved = 0;
2092         if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2093                                  xp->selector.sport,
2094                                  (struct sockaddr *) (addr + 1),
2095                                  xp->family))
2096                 BUG();
2097
2098         /* dst address */
2099         addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
2100         addr->sadb_address_len =
2101                 (sizeof(struct sadb_address)+sockaddr_size)/
2102                         sizeof(uint64_t);
2103         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2104         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2105         addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2106         addr->sadb_address_reserved = 0;
2107
2108         pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2109                             (struct sockaddr *) (addr + 1),
2110                             xp->family);
2111
2112         /* hard time */
2113         lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2114         lifetime->sadb_lifetime_len =
2115                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2116         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2117         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.hard_packet_limit);
2118         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2119         lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2120         lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2121         /* soft time */
2122         lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2123         lifetime->sadb_lifetime_len =
2124                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2125         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2126         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.soft_packet_limit);
2127         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2128         lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2129         lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2130         /* current time */
2131         lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2132         lifetime->sadb_lifetime_len =
2133                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2134         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2135         lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2136         lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2137         lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2138         lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2139
2140         pol = skb_put(skb, sizeof(struct sadb_x_policy));
2141         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2142         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2143         pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2144         if (xp->action == XFRM_POLICY_ALLOW) {
2145                 if (xp->xfrm_nr)
2146                         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2147                 else
2148                         pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2149         }
2150         pol->sadb_x_policy_dir = dir+1;
2151         pol->sadb_x_policy_reserved = 0;
2152         pol->sadb_x_policy_id = xp->index;
2153         pol->sadb_x_policy_priority = xp->priority;
2154
2155         for (i=0; i<xp->xfrm_nr; i++) {
2156                 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
2157                 struct sadb_x_ipsecrequest *rq;
2158                 int req_size;
2159                 int mode;
2160
2161                 req_size = sizeof(struct sadb_x_ipsecrequest);
2162                 if (t->mode == XFRM_MODE_TUNNEL) {
2163                         socklen = pfkey_sockaddr_len(t->encap_family);
2164                         req_size += socklen * 2;
2165                 } else {
2166                         size -= 2*socklen;
2167                 }
2168                 rq = skb_put(skb, req_size);
2169                 pol->sadb_x_policy_len += req_size/8;
2170                 memset(rq, 0, sizeof(*rq));
2171                 rq->sadb_x_ipsecrequest_len = req_size;
2172                 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2173                 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2174                         return -EINVAL;
2175                 rq->sadb_x_ipsecrequest_mode = mode;
2176                 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2177                 if (t->reqid)
2178                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2179                 if (t->optional)
2180                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2181                 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2182
2183                 if (t->mode == XFRM_MODE_TUNNEL) {
2184                         u8 *sa = (void *)(rq + 1);
2185                         pfkey_sockaddr_fill(&t->saddr, 0,
2186                                             (struct sockaddr *)sa,
2187                                             t->encap_family);
2188                         pfkey_sockaddr_fill(&t->id.daddr, 0,
2189                                             (struct sockaddr *) (sa + socklen),
2190                                             t->encap_family);
2191                 }
2192         }
2193
2194         /* security context */
2195         if ((xfrm_ctx = xp->security)) {
2196                 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2197
2198                 sec_ctx = skb_put(skb, ctx_size);
2199                 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2200                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2201                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2202                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2203                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2204                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2205                        xfrm_ctx->ctx_len);
2206         }
2207
2208         hdr->sadb_msg_len = size / sizeof(uint64_t);
2209         hdr->sadb_msg_reserved = refcount_read(&xp->refcnt);
2210
2211         return 0;
2212 }
2213
2214 static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2215 {
2216         struct sk_buff *out_skb;
2217         struct sadb_msg *out_hdr;
2218         int err;
2219
2220         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2221         if (IS_ERR(out_skb))
2222                 return PTR_ERR(out_skb);
2223
2224         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2225         if (err < 0) {
2226                 kfree_skb(out_skb);
2227                 return err;
2228         }
2229
2230         out_hdr = (struct sadb_msg *) out_skb->data;
2231         out_hdr->sadb_msg_version = PF_KEY_V2;
2232
2233         if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2234                 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2235         else
2236                 out_hdr->sadb_msg_type = event2poltype(c->event);
2237         out_hdr->sadb_msg_errno = 0;
2238         out_hdr->sadb_msg_seq = c->seq;
2239         out_hdr->sadb_msg_pid = c->portid;
2240         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
2241         return 0;
2242
2243 }
2244
2245 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2246 {
2247         struct net *net = sock_net(sk);
2248         int err = 0;
2249         struct sadb_lifetime *lifetime;
2250         struct sadb_address *sa;
2251         struct sadb_x_policy *pol;
2252         struct xfrm_policy *xp;
2253         struct km_event c;
2254         struct sadb_x_sec_ctx *sec_ctx;
2255
2256         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2257                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2258             !ext_hdrs[SADB_X_EXT_POLICY-1])
2259                 return -EINVAL;
2260
2261         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2262         if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2263                 return -EINVAL;
2264         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2265                 return -EINVAL;
2266
2267         xp = xfrm_policy_alloc(net, GFP_KERNEL);
2268         if (xp == NULL)
2269                 return -ENOBUFS;
2270
2271         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2272                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2273         xp->priority = pol->sadb_x_policy_priority;
2274
2275         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2276         xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2277         xp->selector.family = xp->family;
2278         xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2279         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2280         xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2281         if (xp->selector.sport)
2282                 xp->selector.sport_mask = htons(0xffff);
2283
2284         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2285         pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2286         xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2287
2288         /* Amusing, we set this twice.  KAME apps appear to set same value
2289          * in both addresses.
2290          */
2291         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2292
2293         xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2294         if (xp->selector.dport)
2295                 xp->selector.dport_mask = htons(0xffff);
2296
2297         sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2298         if (sec_ctx != NULL) {
2299                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2300
2301                 if (!uctx) {
2302                         err = -ENOBUFS;
2303                         goto out;
2304                 }
2305
2306                 err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL);
2307                 kfree(uctx);
2308
2309                 if (err)
2310                         goto out;
2311         }
2312
2313         xp->lft.soft_byte_limit = XFRM_INF;
2314         xp->lft.hard_byte_limit = XFRM_INF;
2315         xp->lft.soft_packet_limit = XFRM_INF;
2316         xp->lft.hard_packet_limit = XFRM_INF;
2317         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2318                 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2319                 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2320                 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2321                 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2322         }
2323         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2324                 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2325                 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2326                 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2327                 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2328         }
2329         xp->xfrm_nr = 0;
2330         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2331             (err = parse_ipsecrequests(xp, pol)) < 0)
2332                 goto out;
2333
2334         err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2335                                  hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2336
2337         xfrm_audit_policy_add(xp, err ? 0 : 1, true);
2338
2339         if (err)
2340                 goto out;
2341
2342         if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2343                 c.event = XFRM_MSG_UPDPOLICY;
2344         else
2345                 c.event = XFRM_MSG_NEWPOLICY;
2346
2347         c.seq = hdr->sadb_msg_seq;
2348         c.portid = hdr->sadb_msg_pid;
2349
2350         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2351         xfrm_pol_put(xp);
2352         return 0;
2353
2354 out:
2355         xp->walk.dead = 1;
2356         xfrm_policy_destroy(xp);
2357         return err;
2358 }
2359
2360 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2361 {
2362         struct net *net = sock_net(sk);
2363         int err;
2364         struct sadb_address *sa;
2365         struct sadb_x_policy *pol;
2366         struct xfrm_policy *xp;
2367         struct xfrm_selector sel;
2368         struct km_event c;
2369         struct sadb_x_sec_ctx *sec_ctx;
2370         struct xfrm_sec_ctx *pol_ctx = NULL;
2371
2372         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2373                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2374             !ext_hdrs[SADB_X_EXT_POLICY-1])
2375                 return -EINVAL;
2376
2377         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2378         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2379                 return -EINVAL;
2380
2381         memset(&sel, 0, sizeof(sel));
2382
2383         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2384         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2385         sel.prefixlen_s = sa->sadb_address_prefixlen;
2386         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2387         sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2388         if (sel.sport)
2389                 sel.sport_mask = htons(0xffff);
2390
2391         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2392         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2393         sel.prefixlen_d = sa->sadb_address_prefixlen;
2394         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2395         sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2396         if (sel.dport)
2397                 sel.dport_mask = htons(0xffff);
2398
2399         sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2400         if (sec_ctx != NULL) {
2401                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2402
2403                 if (!uctx)
2404                         return -ENOMEM;
2405
2406                 err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL);
2407                 kfree(uctx);
2408                 if (err)
2409                         return err;
2410         }
2411
2412         xp = xfrm_policy_bysel_ctx(net, &dummy_mark, 0, XFRM_POLICY_TYPE_MAIN,
2413                                    pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2414                                    1, &err);
2415         security_xfrm_policy_free(pol_ctx);
2416         if (xp == NULL)
2417                 return -ENOENT;
2418
2419         xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2420
2421         if (err)
2422                 goto out;
2423
2424         c.seq = hdr->sadb_msg_seq;
2425         c.portid = hdr->sadb_msg_pid;
2426         c.data.byid = 0;
2427         c.event = XFRM_MSG_DELPOLICY;
2428         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2429
2430 out:
2431         xfrm_pol_put(xp);
2432         return err;
2433 }
2434
2435 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
2436 {
2437         int err;
2438         struct sk_buff *out_skb;
2439         struct sadb_msg *out_hdr;
2440         err = 0;
2441
2442         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2443         if (IS_ERR(out_skb)) {
2444                 err =  PTR_ERR(out_skb);
2445                 goto out;
2446         }
2447         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2448         if (err < 0) {
2449                 kfree_skb(out_skb);
2450                 goto out;
2451         }
2452
2453         out_hdr = (struct sadb_msg *) out_skb->data;
2454         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2455         out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2456         out_hdr->sadb_msg_satype = 0;
2457         out_hdr->sadb_msg_errno = 0;
2458         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2459         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2460         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
2461         err = 0;
2462
2463 out:
2464         return err;
2465 }
2466
2467 static int pfkey_sockaddr_pair_size(sa_family_t family)
2468 {
2469         return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2470 }
2471
2472 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2473                                xfrm_address_t *saddr, xfrm_address_t *daddr,
2474                                u16 *family)
2475 {
2476         int af, socklen;
2477
2478         if (ext_len < 2 || ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2479                 return -EINVAL;
2480
2481         af = pfkey_sockaddr_extract(sa, saddr);
2482         if (!af)
2483                 return -EINVAL;
2484
2485         socklen = pfkey_sockaddr_len(af);
2486         if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2487                                    daddr) != af)
2488                 return -EINVAL;
2489
2490         *family = af;
2491         return 0;
2492 }
2493
2494 #ifdef CONFIG_NET_KEY_MIGRATE
2495 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2496                                     struct xfrm_migrate *m)
2497 {
2498         int err;
2499         struct sadb_x_ipsecrequest *rq2;
2500         int mode;
2501
2502         if (len < sizeof(*rq1) ||
2503             len < rq1->sadb_x_ipsecrequest_len ||
2504             rq1->sadb_x_ipsecrequest_len < sizeof(*rq1))
2505                 return -EINVAL;
2506
2507         /* old endoints */
2508         err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2509                                   rq1->sadb_x_ipsecrequest_len - sizeof(*rq1),
2510                                   &m->old_saddr, &m->old_daddr,
2511                                   &m->old_family);
2512         if (err)
2513                 return err;
2514
2515         rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2516         len -= rq1->sadb_x_ipsecrequest_len;
2517
2518         if (len <= sizeof(*rq2) ||
2519             len < rq2->sadb_x_ipsecrequest_len ||
2520             rq2->sadb_x_ipsecrequest_len < sizeof(*rq2))
2521                 return -EINVAL;
2522
2523         /* new endpoints */
2524         err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2525                                   rq2->sadb_x_ipsecrequest_len - sizeof(*rq2),
2526                                   &m->new_saddr, &m->new_daddr,
2527                                   &m->new_family);
2528         if (err)
2529                 return err;
2530
2531         if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2532             rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2533             rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2534                 return -EINVAL;
2535
2536         m->proto = rq1->sadb_x_ipsecrequest_proto;
2537         if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2538                 return -EINVAL;
2539         m->mode = mode;
2540         m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2541
2542         return ((int)(rq1->sadb_x_ipsecrequest_len +
2543                       rq2->sadb_x_ipsecrequest_len));
2544 }
2545
2546 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2547                          const struct sadb_msg *hdr, void * const *ext_hdrs)
2548 {
2549         int i, len, ret, err = -EINVAL;
2550         u8 dir;
2551         struct sadb_address *sa;
2552         struct sadb_x_kmaddress *kma;
2553         struct sadb_x_policy *pol;
2554         struct sadb_x_ipsecrequest *rq;
2555         struct xfrm_selector sel;
2556         struct xfrm_migrate m[XFRM_MAX_DEPTH];
2557         struct xfrm_kmaddress k;
2558         struct net *net = sock_net(sk);
2559
2560         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2561                                      ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2562             !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2563                 err = -EINVAL;
2564                 goto out;
2565         }
2566
2567         kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2568         pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2569
2570         if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2571                 err = -EINVAL;
2572                 goto out;
2573         }
2574
2575         if (kma) {
2576                 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2577                 k.reserved = kma->sadb_x_kmaddress_reserved;
2578                 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2579                                           8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2580                                           &k.local, &k.remote, &k.family);
2581                 if (ret < 0) {
2582                         err = ret;
2583                         goto out;
2584                 }
2585         }
2586
2587         dir = pol->sadb_x_policy_dir - 1;
2588         memset(&sel, 0, sizeof(sel));
2589
2590         /* set source address info of selector */
2591         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2592         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2593         sel.prefixlen_s = sa->sadb_address_prefixlen;
2594         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2595         sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2596         if (sel.sport)
2597                 sel.sport_mask = htons(0xffff);
2598
2599         /* set destination address info of selector */
2600         sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
2601         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2602         sel.prefixlen_d = sa->sadb_address_prefixlen;
2603         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2604         sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2605         if (sel.dport)
2606                 sel.dport_mask = htons(0xffff);
2607
2608         rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2609
2610         /* extract ipsecrequests */
2611         i = 0;
2612         len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2613
2614         while (len > 0 && i < XFRM_MAX_DEPTH) {
2615                 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2616                 if (ret < 0) {
2617                         err = ret;
2618                         goto out;
2619                 } else {
2620                         rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2621                         len -= ret;
2622                         i++;
2623                 }
2624         }
2625
2626         if (!i || len > 0) {
2627                 err = -EINVAL;
2628                 goto out;
2629         }
2630
2631         return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2632                             kma ? &k : NULL, net, NULL, 0, NULL);
2633
2634  out:
2635         return err;
2636 }
2637 #else
2638 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2639                          const struct sadb_msg *hdr, void * const *ext_hdrs)
2640 {
2641         return -ENOPROTOOPT;
2642 }
2643 #endif
2644
2645
2646 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2647 {
2648         struct net *net = sock_net(sk);
2649         unsigned int dir;
2650         int err = 0, delete;
2651         struct sadb_x_policy *pol;
2652         struct xfrm_policy *xp;
2653         struct km_event c;
2654
2655         if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2656                 return -EINVAL;
2657
2658         dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2659         if (dir >= XFRM_POLICY_MAX)
2660                 return -EINVAL;
2661
2662         delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2663         xp = xfrm_policy_byid(net, &dummy_mark, 0, XFRM_POLICY_TYPE_MAIN,
2664                               dir, pol->sadb_x_policy_id, delete, &err);
2665         if (xp == NULL)
2666                 return -ENOENT;
2667
2668         if (delete) {
2669                 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2670
2671                 if (err)
2672                         goto out;
2673                 c.seq = hdr->sadb_msg_seq;
2674                 c.portid = hdr->sadb_msg_pid;
2675                 c.data.byid = 1;
2676                 c.event = XFRM_MSG_DELPOLICY;
2677                 km_policy_notify(xp, dir, &c);
2678         } else {
2679                 err = key_pol_get_resp(sk, xp, hdr, dir);
2680         }
2681
2682 out:
2683         xfrm_pol_put(xp);
2684         return err;
2685 }
2686
2687 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2688 {
2689         struct pfkey_sock *pfk = ptr;
2690         struct sk_buff *out_skb;
2691         struct sadb_msg *out_hdr;
2692         int err;
2693
2694         if (!pfkey_can_dump(&pfk->sk))
2695                 return -ENOBUFS;
2696
2697         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2698         if (IS_ERR(out_skb))
2699                 return PTR_ERR(out_skb);
2700
2701         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2702         if (err < 0) {
2703                 kfree_skb(out_skb);
2704                 return err;
2705         }
2706
2707         out_hdr = (struct sadb_msg *) out_skb->data;
2708         out_hdr->sadb_msg_version = pfk->dump.msg_version;
2709         out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2710         out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2711         out_hdr->sadb_msg_errno = 0;
2712         out_hdr->sadb_msg_seq = count + 1;
2713         out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
2714
2715         if (pfk->dump.skb)
2716                 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
2717                                 &pfk->sk, sock_net(&pfk->sk));
2718         pfk->dump.skb = out_skb;
2719
2720         return 0;
2721 }
2722
2723 static int pfkey_dump_sp(struct pfkey_sock *pfk)
2724 {
2725         struct net *net = sock_net(&pfk->sk);
2726         return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2727 }
2728
2729 static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2730 {
2731         struct net *net = sock_net((struct sock *)pfk);
2732
2733         xfrm_policy_walk_done(&pfk->dump.u.policy, net);
2734 }
2735
2736 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2737 {
2738         struct pfkey_sock *pfk = pfkey_sk(sk);
2739
2740         mutex_lock(&pfk->dump_lock);
2741         if (pfk->dump.dump != NULL) {
2742                 mutex_unlock(&pfk->dump_lock);
2743                 return -EBUSY;
2744         }
2745
2746         pfk->dump.msg_version = hdr->sadb_msg_version;
2747         pfk->dump.msg_portid = hdr->sadb_msg_pid;
2748         pfk->dump.dump = pfkey_dump_sp;
2749         pfk->dump.done = pfkey_dump_sp_done;
2750         xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2751         mutex_unlock(&pfk->dump_lock);
2752
2753         return pfkey_do_dump(pfk);
2754 }
2755
2756 static int key_notify_policy_flush(const struct km_event *c)
2757 {
2758         struct sk_buff *skb_out;
2759         struct sadb_msg *hdr;
2760
2761         skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2762         if (!skb_out)
2763                 return -ENOBUFS;
2764         hdr = skb_put(skb_out, sizeof(struct sadb_msg));
2765         hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2766         hdr->sadb_msg_seq = c->seq;
2767         hdr->sadb_msg_pid = c->portid;
2768         hdr->sadb_msg_version = PF_KEY_V2;
2769         hdr->sadb_msg_errno = (uint8_t) 0;
2770         hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2771         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2772         hdr->sadb_msg_reserved = 0;
2773         pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
2774         return 0;
2775
2776 }
2777
2778 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2779 {
2780         struct net *net = sock_net(sk);
2781         struct km_event c;
2782         int err, err2;
2783
2784         err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, true);
2785         err2 = unicast_flush_resp(sk, hdr);
2786         if (err || err2) {
2787                 if (err == -ESRCH) /* empty table - old silent behavior */
2788                         return 0;
2789                 return err;
2790         }
2791
2792         c.data.type = XFRM_POLICY_TYPE_MAIN;
2793         c.event = XFRM_MSG_FLUSHPOLICY;
2794         c.portid = hdr->sadb_msg_pid;
2795         c.seq = hdr->sadb_msg_seq;
2796         c.net = net;
2797         km_policy_notify(NULL, 0, &c);
2798
2799         return 0;
2800 }
2801
2802 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2803                              const struct sadb_msg *hdr, void * const *ext_hdrs);
2804 static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2805         [SADB_RESERVED]         = pfkey_reserved,
2806         [SADB_GETSPI]           = pfkey_getspi,
2807         [SADB_UPDATE]           = pfkey_add,
2808         [SADB_ADD]              = pfkey_add,
2809         [SADB_DELETE]           = pfkey_delete,
2810         [SADB_GET]              = pfkey_get,
2811         [SADB_ACQUIRE]          = pfkey_acquire,
2812         [SADB_REGISTER]         = pfkey_register,
2813         [SADB_EXPIRE]           = NULL,
2814         [SADB_FLUSH]            = pfkey_flush,
2815         [SADB_DUMP]             = pfkey_dump,
2816         [SADB_X_PROMISC]        = pfkey_promisc,
2817         [SADB_X_PCHANGE]        = NULL,
2818         [SADB_X_SPDUPDATE]      = pfkey_spdadd,
2819         [SADB_X_SPDADD]         = pfkey_spdadd,
2820         [SADB_X_SPDDELETE]      = pfkey_spddelete,
2821         [SADB_X_SPDGET]         = pfkey_spdget,
2822         [SADB_X_SPDACQUIRE]     = NULL,
2823         [SADB_X_SPDDUMP]        = pfkey_spddump,
2824         [SADB_X_SPDFLUSH]       = pfkey_spdflush,
2825         [SADB_X_SPDSETIDX]      = pfkey_spdadd,
2826         [SADB_X_SPDDELETE2]     = pfkey_spdget,
2827         [SADB_X_MIGRATE]        = pfkey_migrate,
2828 };
2829
2830 static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
2831 {
2832         void *ext_hdrs[SADB_EXT_MAX];
2833         int err;
2834
2835         /* Non-zero return value of pfkey_broadcast() does not always signal
2836          * an error and even on an actual error we may still want to process
2837          * the message so rather ignore the return value.
2838          */
2839         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2840                         BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
2841
2842         memset(ext_hdrs, 0, sizeof(ext_hdrs));
2843         err = parse_exthdrs(skb, hdr, ext_hdrs);
2844         if (!err) {
2845                 err = -EOPNOTSUPP;
2846                 if (pfkey_funcs[hdr->sadb_msg_type])
2847                         err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2848         }
2849         return err;
2850 }
2851
2852 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2853 {
2854         struct sadb_msg *hdr = NULL;
2855
2856         if (skb->len < sizeof(*hdr)) {
2857                 *errp = -EMSGSIZE;
2858         } else {
2859                 hdr = (struct sadb_msg *) skb->data;
2860                 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2861                     hdr->sadb_msg_reserved != 0 ||
2862                     (hdr->sadb_msg_type <= SADB_RESERVED ||
2863                      hdr->sadb_msg_type > SADB_MAX)) {
2864                         hdr = NULL;
2865                         *errp = -EINVAL;
2866                 } else if (hdr->sadb_msg_len != (skb->len /
2867                                                  sizeof(uint64_t)) ||
2868                            hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2869                                                 sizeof(uint64_t))) {
2870                         hdr = NULL;
2871                         *errp = -EMSGSIZE;
2872                 } else {
2873                         *errp = 0;
2874                 }
2875         }
2876         return hdr;
2877 }
2878
2879 static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2880                                 const struct xfrm_algo_desc *d)
2881 {
2882         unsigned int id = d->desc.sadb_alg_id;
2883
2884         if (id >= sizeof(t->aalgos) * 8)
2885                 return 0;
2886
2887         return (t->aalgos >> id) & 1;
2888 }
2889
2890 static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2891                                 const struct xfrm_algo_desc *d)
2892 {
2893         unsigned int id = d->desc.sadb_alg_id;
2894
2895         if (id >= sizeof(t->ealgos) * 8)
2896                 return 0;
2897
2898         return (t->ealgos >> id) & 1;
2899 }
2900
2901 static int count_ah_combs(const struct xfrm_tmpl *t)
2902 {
2903         int i, sz = 0;
2904
2905         for (i = 0; ; i++) {
2906                 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2907                 if (!aalg)
2908                         break;
2909                 if (!aalg->pfkey_supported)
2910                         continue;
2911                 if (aalg_tmpl_set(t, aalg))
2912                         sz += sizeof(struct sadb_comb);
2913         }
2914         return sz + sizeof(struct sadb_prop);
2915 }
2916
2917 static int count_esp_combs(const struct xfrm_tmpl *t)
2918 {
2919         int i, k, sz = 0;
2920
2921         for (i = 0; ; i++) {
2922                 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2923                 if (!ealg)
2924                         break;
2925
2926                 if (!ealg->pfkey_supported)
2927                         continue;
2928
2929                 if (!(ealg_tmpl_set(t, ealg)))
2930                         continue;
2931
2932                 for (k = 1; ; k++) {
2933                         const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2934                         if (!aalg)
2935                                 break;
2936
2937                         if (!aalg->pfkey_supported)
2938                                 continue;
2939
2940                         if (aalg_tmpl_set(t, aalg))
2941                                 sz += sizeof(struct sadb_comb);
2942                 }
2943         }
2944         return sz + sizeof(struct sadb_prop);
2945 }
2946
2947 static int dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2948 {
2949         struct sadb_prop *p;
2950         int sz = 0;
2951         int i;
2952
2953         p = skb_put(skb, sizeof(struct sadb_prop));
2954         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2955         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2956         p->sadb_prop_replay = 32;
2957         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2958
2959         for (i = 0; ; i++) {
2960                 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2961                 if (!aalg)
2962                         break;
2963
2964                 if (!aalg->pfkey_supported)
2965                         continue;
2966
2967                 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2968                         struct sadb_comb *c;
2969                         c = skb_put_zero(skb, sizeof(struct sadb_comb));
2970                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2971                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2972                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2973                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2974                         c->sadb_comb_hard_addtime = 24*60*60;
2975                         c->sadb_comb_soft_addtime = 20*60*60;
2976                         c->sadb_comb_hard_usetime = 8*60*60;
2977                         c->sadb_comb_soft_usetime = 7*60*60;
2978                         sz += sizeof(*c);
2979                 }
2980         }
2981
2982         return sz + sizeof(*p);
2983 }
2984
2985 static int dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2986 {
2987         struct sadb_prop *p;
2988         int sz = 0;
2989         int i, k;
2990
2991         p = skb_put(skb, sizeof(struct sadb_prop));
2992         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2993         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2994         p->sadb_prop_replay = 32;
2995         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2996
2997         for (i=0; ; i++) {
2998                 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2999                 if (!ealg)
3000                         break;
3001
3002                 if (!ealg->pfkey_supported)
3003                         continue;
3004
3005                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
3006                         continue;
3007
3008                 for (k = 1; ; k++) {
3009                         struct sadb_comb *c;
3010                         const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
3011                         if (!aalg)
3012                                 break;
3013                         if (!aalg->pfkey_supported)
3014                                 continue;
3015                         if (!(aalg_tmpl_set(t, aalg) && aalg->available))
3016                                 continue;
3017                         c = skb_put(skb, sizeof(struct sadb_comb));
3018                         memset(c, 0, sizeof(*c));
3019                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
3020                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
3021                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
3022                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
3023                         c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
3024                         c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
3025                         c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
3026                         c->sadb_comb_hard_addtime = 24*60*60;
3027                         c->sadb_comb_soft_addtime = 20*60*60;
3028                         c->sadb_comb_hard_usetime = 8*60*60;
3029                         c->sadb_comb_soft_usetime = 7*60*60;
3030                         sz += sizeof(*c);
3031                 }
3032         }
3033
3034         return sz + sizeof(*p);
3035 }
3036
3037 static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
3038 {
3039         return 0;
3040 }
3041
3042 static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
3043 {
3044         struct sk_buff *out_skb;
3045         struct sadb_msg *out_hdr;
3046         int hard;
3047         int hsc;
3048
3049         hard = c->data.hard;
3050         if (hard)
3051                 hsc = 2;
3052         else
3053                 hsc = 1;
3054
3055         out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
3056         if (IS_ERR(out_skb))
3057                 return PTR_ERR(out_skb);
3058
3059         out_hdr = (struct sadb_msg *) out_skb->data;
3060         out_hdr->sadb_msg_version = PF_KEY_V2;
3061         out_hdr->sadb_msg_type = SADB_EXPIRE;
3062         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3063         out_hdr->sadb_msg_errno = 0;
3064         out_hdr->sadb_msg_reserved = 0;
3065         out_hdr->sadb_msg_seq = 0;
3066         out_hdr->sadb_msg_pid = 0;
3067
3068         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3069                         xs_net(x));
3070         return 0;
3071 }
3072
3073 static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
3074 {
3075         struct net *net = x ? xs_net(x) : c->net;
3076         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3077
3078         if (atomic_read(&net_pfkey->socks_nr) == 0)
3079                 return 0;
3080
3081         switch (c->event) {
3082         case XFRM_MSG_EXPIRE:
3083                 return key_notify_sa_expire(x, c);
3084         case XFRM_MSG_DELSA:
3085         case XFRM_MSG_NEWSA:
3086         case XFRM_MSG_UPDSA:
3087                 return key_notify_sa(x, c);
3088         case XFRM_MSG_FLUSHSA:
3089                 return key_notify_sa_flush(c);
3090         case XFRM_MSG_NEWAE: /* not yet supported */
3091                 break;
3092         default:
3093                 pr_err("pfkey: Unknown SA event %d\n", c->event);
3094                 break;
3095         }
3096
3097         return 0;
3098 }
3099
3100 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3101 {
3102         if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3103                 return 0;
3104
3105         switch (c->event) {
3106         case XFRM_MSG_POLEXPIRE:
3107                 return key_notify_policy_expire(xp, c);
3108         case XFRM_MSG_DELPOLICY:
3109         case XFRM_MSG_NEWPOLICY:
3110         case XFRM_MSG_UPDPOLICY:
3111                 return key_notify_policy(xp, dir, c);
3112         case XFRM_MSG_FLUSHPOLICY:
3113                 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3114                         break;
3115                 return key_notify_policy_flush(c);
3116         default:
3117                 pr_err("pfkey: Unknown policy event %d\n", c->event);
3118                 break;
3119         }
3120
3121         return 0;
3122 }
3123
3124 static u32 get_acqseq(void)
3125 {
3126         u32 res;
3127         static atomic_t acqseq;
3128
3129         do {
3130                 res = atomic_inc_return(&acqseq);
3131         } while (!res);
3132         return res;
3133 }
3134
3135 static bool pfkey_is_alive(const struct km_event *c)
3136 {
3137         struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id);
3138         struct sock *sk;
3139         bool is_alive = false;
3140
3141         rcu_read_lock();
3142         sk_for_each_rcu(sk, &net_pfkey->table) {
3143                 if (pfkey_sk(sk)->registered) {
3144                         is_alive = true;
3145                         break;
3146                 }
3147         }
3148         rcu_read_unlock();
3149
3150         return is_alive;
3151 }
3152
3153 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
3154 {
3155         struct sk_buff *skb;
3156         struct sadb_msg *hdr;
3157         struct sadb_address *addr;
3158         struct sadb_x_policy *pol;
3159         int sockaddr_size;
3160         int size;
3161         struct sadb_x_sec_ctx *sec_ctx;
3162         struct xfrm_sec_ctx *xfrm_ctx;
3163         int ctx_size = 0;
3164         int alg_size = 0;
3165
3166         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3167         if (!sockaddr_size)
3168                 return -EINVAL;
3169
3170         size = sizeof(struct sadb_msg) +
3171                 (sizeof(struct sadb_address) * 2) +
3172                 (sockaddr_size * 2) +
3173                 sizeof(struct sadb_x_policy);
3174
3175         if (x->id.proto == IPPROTO_AH)
3176                 alg_size = count_ah_combs(t);
3177         else if (x->id.proto == IPPROTO_ESP)
3178                 alg_size = count_esp_combs(t);
3179
3180         if ((xfrm_ctx = x->security)) {
3181                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3182                 size +=  sizeof(struct sadb_x_sec_ctx) + ctx_size;
3183         }
3184
3185         skb =  alloc_skb(size + alg_size + 16, GFP_ATOMIC);
3186         if (skb == NULL)
3187                 return -ENOMEM;
3188
3189         hdr = skb_put(skb, sizeof(struct sadb_msg));
3190         hdr->sadb_msg_version = PF_KEY_V2;
3191         hdr->sadb_msg_type = SADB_ACQUIRE;
3192         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3193         hdr->sadb_msg_len = size / sizeof(uint64_t);
3194         hdr->sadb_msg_errno = 0;
3195         hdr->sadb_msg_reserved = 0;
3196         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3197         hdr->sadb_msg_pid = 0;
3198
3199         /* src address */
3200         addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3201         addr->sadb_address_len =
3202                 (sizeof(struct sadb_address)+sockaddr_size)/
3203                         sizeof(uint64_t);
3204         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3205         addr->sadb_address_proto = 0;
3206         addr->sadb_address_reserved = 0;
3207         addr->sadb_address_prefixlen =
3208                 pfkey_sockaddr_fill(&x->props.saddr, 0,
3209                                     (struct sockaddr *) (addr + 1),
3210                                     x->props.family);
3211         if (!addr->sadb_address_prefixlen)
3212                 BUG();
3213
3214         /* dst address */
3215         addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3216         addr->sadb_address_len =
3217                 (sizeof(struct sadb_address)+sockaddr_size)/
3218                         sizeof(uint64_t);
3219         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3220         addr->sadb_address_proto = 0;
3221         addr->sadb_address_reserved = 0;
3222         addr->sadb_address_prefixlen =
3223                 pfkey_sockaddr_fill(&x->id.daddr, 0,
3224                                     (struct sockaddr *) (addr + 1),
3225                                     x->props.family);
3226         if (!addr->sadb_address_prefixlen)
3227                 BUG();
3228
3229         pol = skb_put(skb, sizeof(struct sadb_x_policy));
3230         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3231         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3232         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3233         pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
3234         pol->sadb_x_policy_reserved = 0;
3235         pol->sadb_x_policy_id = xp->index;
3236         pol->sadb_x_policy_priority = xp->priority;
3237
3238         /* Set sadb_comb's. */
3239         alg_size = 0;
3240         if (x->id.proto == IPPROTO_AH)
3241                 alg_size = dump_ah_combs(skb, t);
3242         else if (x->id.proto == IPPROTO_ESP)
3243                 alg_size = dump_esp_combs(skb, t);
3244
3245         hdr->sadb_msg_len += alg_size / 8;
3246
3247         /* security context */
3248         if (xfrm_ctx) {
3249                 sec_ctx = skb_put(skb,
3250                                   sizeof(struct sadb_x_sec_ctx) + ctx_size);
3251                 sec_ctx->sadb_x_sec_len =
3252                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3253                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3254                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3255                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3256                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3257                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3258                        xfrm_ctx->ctx_len);
3259         }
3260
3261         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3262                                xs_net(x));
3263 }
3264
3265 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3266                                                 u8 *data, int len, int *dir)
3267 {
3268         struct net *net = sock_net(sk);
3269         struct xfrm_policy *xp;
3270         struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3271         struct sadb_x_sec_ctx *sec_ctx;
3272
3273         switch (sk->sk_family) {
3274         case AF_INET:
3275                 if (opt != IP_IPSEC_POLICY) {
3276                         *dir = -EOPNOTSUPP;
3277                         return NULL;
3278                 }
3279                 break;
3280 #if IS_ENABLED(CONFIG_IPV6)
3281         case AF_INET6:
3282                 if (opt != IPV6_IPSEC_POLICY) {
3283                         *dir = -EOPNOTSUPP;
3284                         return NULL;
3285                 }
3286                 break;
3287 #endif
3288         default:
3289                 *dir = -EINVAL;
3290                 return NULL;
3291         }
3292
3293         *dir = -EINVAL;
3294
3295         if (len < sizeof(struct sadb_x_policy) ||
3296             pol->sadb_x_policy_len*8 > len ||
3297             pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3298             (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3299                 return NULL;
3300
3301         xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3302         if (xp == NULL) {
3303                 *dir = -ENOBUFS;
3304                 return NULL;
3305         }
3306
3307         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3308                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3309
3310         xp->lft.soft_byte_limit = XFRM_INF;
3311         xp->lft.hard_byte_limit = XFRM_INF;
3312         xp->lft.soft_packet_limit = XFRM_INF;
3313         xp->lft.hard_packet_limit = XFRM_INF;
3314         xp->family = sk->sk_family;
3315
3316         xp->xfrm_nr = 0;
3317         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3318             (*dir = parse_ipsecrequests(xp, pol)) < 0)
3319                 goto out;
3320
3321         /* security context too */
3322         if (len >= (pol->sadb_x_policy_len*8 +
3323             sizeof(struct sadb_x_sec_ctx))) {
3324                 char *p = (char *)pol;
3325                 struct xfrm_user_sec_ctx *uctx;
3326
3327                 p += pol->sadb_x_policy_len*8;
3328                 sec_ctx = (struct sadb_x_sec_ctx *)p;
3329                 if (len < pol->sadb_x_policy_len*8 +
3330                     sec_ctx->sadb_x_sec_len*8) {
3331                         *dir = -EINVAL;
3332                         goto out;
3333                 }
3334                 if ((*dir = verify_sec_ctx_len(p)))
3335                         goto out;
3336                 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC);
3337                 *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC);
3338                 kfree(uctx);
3339
3340                 if (*dir)
3341                         goto out;
3342         }
3343
3344         *dir = pol->sadb_x_policy_dir-1;
3345         return xp;
3346
3347 out:
3348         xp->walk.dead = 1;
3349         xfrm_policy_destroy(xp);
3350         return NULL;
3351 }
3352
3353 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3354 {
3355         struct sk_buff *skb;
3356         struct sadb_msg *hdr;
3357         struct sadb_sa *sa;
3358         struct sadb_address *addr;
3359         struct sadb_x_nat_t_port *n_port;
3360         int sockaddr_size;
3361         int size;
3362         __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3363         struct xfrm_encap_tmpl *natt = NULL;
3364
3365         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3366         if (!sockaddr_size)
3367                 return -EINVAL;
3368
3369         if (!satype)
3370                 return -EINVAL;
3371
3372         if (!x->encap)
3373                 return -EINVAL;
3374
3375         natt = x->encap;
3376
3377         /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3378          *
3379          * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3380          * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3381          */
3382
3383         size = sizeof(struct sadb_msg) +
3384                 sizeof(struct sadb_sa) +
3385                 (sizeof(struct sadb_address) * 2) +
3386                 (sockaddr_size * 2) +
3387                 (sizeof(struct sadb_x_nat_t_port) * 2);
3388
3389         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3390         if (skb == NULL)
3391                 return -ENOMEM;
3392
3393         hdr = skb_put(skb, sizeof(struct sadb_msg));
3394         hdr->sadb_msg_version = PF_KEY_V2;
3395         hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3396         hdr->sadb_msg_satype = satype;
3397         hdr->sadb_msg_len = size / sizeof(uint64_t);
3398         hdr->sadb_msg_errno = 0;
3399         hdr->sadb_msg_reserved = 0;
3400         hdr->sadb_msg_seq = x->km.seq;
3401         hdr->sadb_msg_pid = 0;
3402
3403         /* SA */
3404         sa = skb_put(skb, sizeof(struct sadb_sa));
3405         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3406         sa->sadb_sa_exttype = SADB_EXT_SA;
3407         sa->sadb_sa_spi = x->id.spi;
3408         sa->sadb_sa_replay = 0;
3409         sa->sadb_sa_state = 0;
3410         sa->sadb_sa_auth = 0;
3411         sa->sadb_sa_encrypt = 0;
3412         sa->sadb_sa_flags = 0;
3413
3414         /* ADDRESS_SRC (old addr) */
3415         addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3416         addr->sadb_address_len =
3417                 (sizeof(struct sadb_address)+sockaddr_size)/
3418                         sizeof(uint64_t);
3419         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3420         addr->sadb_address_proto = 0;
3421         addr->sadb_address_reserved = 0;
3422         addr->sadb_address_prefixlen =
3423                 pfkey_sockaddr_fill(&x->props.saddr, 0,
3424                                     (struct sockaddr *) (addr + 1),
3425                                     x->props.family);
3426         if (!addr->sadb_address_prefixlen)
3427                 BUG();
3428
3429         /* NAT_T_SPORT (old port) */
3430         n_port = skb_put(skb, sizeof(*n_port));
3431         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3432         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3433         n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3434         n_port->sadb_x_nat_t_port_reserved = 0;
3435
3436         /* ADDRESS_DST (new addr) */
3437         addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3438         addr->sadb_address_len =
3439                 (sizeof(struct sadb_address)+sockaddr_size)/
3440                         sizeof(uint64_t);
3441         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3442         addr->sadb_address_proto = 0;
3443         addr->sadb_address_reserved = 0;
3444         addr->sadb_address_prefixlen =
3445                 pfkey_sockaddr_fill(ipaddr, 0,
3446                                     (struct sockaddr *) (addr + 1),
3447                                     x->props.family);
3448         if (!addr->sadb_address_prefixlen)
3449                 BUG();
3450
3451         /* NAT_T_DPORT (new port) */
3452         n_port = skb_put(skb, sizeof(*n_port));
3453         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3454         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3455         n_port->sadb_x_nat_t_port_port = sport;
3456         n_port->sadb_x_nat_t_port_reserved = 0;
3457
3458         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3459                                xs_net(x));
3460 }
3461
3462 #ifdef CONFIG_NET_KEY_MIGRATE
3463 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3464                             const struct xfrm_selector *sel)
3465 {
3466         struct sadb_address *addr;
3467         addr = skb_put(skb, sizeof(struct sadb_address) + sasize);
3468         addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3469         addr->sadb_address_exttype = type;
3470         addr->sadb_address_proto = sel->proto;
3471         addr->sadb_address_reserved = 0;
3472
3473         switch (type) {
3474         case SADB_EXT_ADDRESS_SRC:
3475                 addr->sadb_address_prefixlen = sel->prefixlen_s;
3476                 pfkey_sockaddr_fill(&sel->saddr, 0,
3477                                     (struct sockaddr *)(addr + 1),
3478                                     sel->family);
3479                 break;
3480         case SADB_EXT_ADDRESS_DST:
3481                 addr->sadb_address_prefixlen = sel->prefixlen_d;
3482                 pfkey_sockaddr_fill(&sel->daddr, 0,
3483                                     (struct sockaddr *)(addr + 1),
3484                                     sel->family);
3485                 break;
3486         default:
3487                 return -EINVAL;
3488         }
3489
3490         return 0;
3491 }
3492
3493
3494 static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
3495 {
3496         struct sadb_x_kmaddress *kma;
3497         u8 *sa;
3498         int family = k->family;
3499         int socklen = pfkey_sockaddr_len(family);
3500         int size_req;
3501
3502         size_req = (sizeof(struct sadb_x_kmaddress) +
3503                     pfkey_sockaddr_pair_size(family));
3504
3505         kma = skb_put_zero(skb, size_req);
3506         kma->sadb_x_kmaddress_len = size_req / 8;
3507         kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3508         kma->sadb_x_kmaddress_reserved = k->reserved;
3509
3510         sa = (u8 *)(kma + 1);
3511         if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3512             !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3513                 return -EINVAL;
3514
3515         return 0;
3516 }
3517
3518 static int set_ipsecrequest(struct sk_buff *skb,
3519                             uint8_t proto, uint8_t mode, int level,
3520                             uint32_t reqid, uint8_t family,
3521                             const xfrm_address_t *src, const xfrm_address_t *dst)
3522 {
3523         struct sadb_x_ipsecrequest *rq;
3524         u8 *sa;
3525         int socklen = pfkey_sockaddr_len(family);
3526         int size_req;
3527
3528         size_req = sizeof(struct sadb_x_ipsecrequest) +
3529                    pfkey_sockaddr_pair_size(family);
3530
3531         rq = skb_put_zero(skb, size_req);
3532         rq->sadb_x_ipsecrequest_len = size_req;
3533         rq->sadb_x_ipsecrequest_proto = proto;
3534         rq->sadb_x_ipsecrequest_mode = mode;
3535         rq->sadb_x_ipsecrequest_level = level;
3536         rq->sadb_x_ipsecrequest_reqid = reqid;
3537
3538         sa = (u8 *) (rq + 1);
3539         if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3540             !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3541                 return -EINVAL;
3542
3543         return 0;
3544 }
3545 #endif
3546
3547 #ifdef CONFIG_NET_KEY_MIGRATE
3548 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3549                               const struct xfrm_migrate *m, int num_bundles,
3550                               const struct xfrm_kmaddress *k,
3551                               const struct xfrm_encap_tmpl *encap)
3552 {
3553         int i;
3554         int sasize_sel;
3555         int size = 0;
3556         int size_pol = 0;
3557         struct sk_buff *skb;
3558         struct sadb_msg *hdr;
3559         struct sadb_x_policy *pol;
3560         const struct xfrm_migrate *mp;
3561
3562         if (type != XFRM_POLICY_TYPE_MAIN)
3563                 return 0;
3564
3565         if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3566                 return -EINVAL;
3567
3568         if (k != NULL) {
3569                 /* addresses for KM */
3570                 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3571                                      pfkey_sockaddr_pair_size(k->family));
3572         }
3573
3574         /* selector */
3575         sasize_sel = pfkey_sockaddr_size(sel->family);
3576         if (!sasize_sel)
3577                 return -EINVAL;
3578         size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3579
3580         /* policy info */
3581         size_pol += sizeof(struct sadb_x_policy);
3582
3583         /* ipsecrequests */
3584         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3585                 /* old locator pair */
3586                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3587                             pfkey_sockaddr_pair_size(mp->old_family);
3588                 /* new locator pair */
3589                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3590                             pfkey_sockaddr_pair_size(mp->new_family);
3591         }
3592
3593         size += sizeof(struct sadb_msg) + size_pol;
3594
3595         /* alloc buffer */
3596         skb = alloc_skb(size, GFP_ATOMIC);
3597         if (skb == NULL)
3598                 return -ENOMEM;
3599
3600         hdr = skb_put(skb, sizeof(struct sadb_msg));
3601         hdr->sadb_msg_version = PF_KEY_V2;
3602         hdr->sadb_msg_type = SADB_X_MIGRATE;
3603         hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3604         hdr->sadb_msg_len = size / 8;
3605         hdr->sadb_msg_errno = 0;
3606         hdr->sadb_msg_reserved = 0;
3607         hdr->sadb_msg_seq = 0;
3608         hdr->sadb_msg_pid = 0;
3609
3610         /* Addresses to be used by KM for negotiation, if ext is available */
3611         if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3612                 goto err;
3613
3614         /* selector src */
3615         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3616
3617         /* selector dst */
3618         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3619
3620         /* policy information */
3621         pol = skb_put(skb, sizeof(struct sadb_x_policy));
3622         pol->sadb_x_policy_len = size_pol / 8;
3623         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3624         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3625         pol->sadb_x_policy_dir = dir + 1;
3626         pol->sadb_x_policy_reserved = 0;
3627         pol->sadb_x_policy_id = 0;
3628         pol->sadb_x_policy_priority = 0;
3629
3630         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3631                 /* old ipsecrequest */
3632                 int mode = pfkey_mode_from_xfrm(mp->mode);
3633                 if (mode < 0)
3634                         goto err;
3635                 if (set_ipsecrequest(skb, mp->proto, mode,
3636                                      (mp->reqid ?  IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3637                                      mp->reqid, mp->old_family,
3638                                      &mp->old_saddr, &mp->old_daddr) < 0)
3639                         goto err;
3640
3641                 /* new ipsecrequest */
3642                 if (set_ipsecrequest(skb, mp->proto, mode,
3643                                      (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3644                                      mp->reqid, mp->new_family,
3645                                      &mp->new_saddr, &mp->new_daddr) < 0)
3646                         goto err;
3647         }
3648
3649         /* broadcast migrate message to sockets */
3650         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
3651
3652         return 0;
3653
3654 err:
3655         kfree_skb(skb);
3656         return -EINVAL;
3657 }
3658 #else
3659 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3660                               const struct xfrm_migrate *m, int num_bundles,
3661                               const struct xfrm_kmaddress *k,
3662                               const struct xfrm_encap_tmpl *encap)
3663 {
3664         return -ENOPROTOOPT;
3665 }
3666 #endif
3667
3668 static int pfkey_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
3669 {
3670         struct sock *sk = sock->sk;
3671         struct sk_buff *skb = NULL;
3672         struct sadb_msg *hdr = NULL;
3673         int err;
3674         struct net *net = sock_net(sk);
3675
3676         err = -EOPNOTSUPP;
3677         if (msg->msg_flags & MSG_OOB)
3678                 goto out;
3679
3680         err = -EMSGSIZE;
3681         if ((unsigned int)len > sk->sk_sndbuf - 32)
3682                 goto out;
3683
3684         err = -ENOBUFS;
3685         skb = alloc_skb(len, GFP_KERNEL);
3686         if (skb == NULL)
3687                 goto out;
3688
3689         err = -EFAULT;
3690         if (memcpy_from_msg(skb_put(skb,len), msg, len))
3691                 goto out;
3692
3693         hdr = pfkey_get_base_msg(skb, &err);
3694         if (!hdr)
3695                 goto out;
3696
3697         mutex_lock(&net->xfrm.xfrm_cfg_mutex);
3698         err = pfkey_process(sk, skb, hdr);
3699         mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
3700
3701 out:
3702         if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3703                 err = 0;
3704         kfree_skb(skb);
3705
3706         return err ? : len;
3707 }
3708
3709 static int pfkey_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
3710                          int flags)
3711 {
3712         struct sock *sk = sock->sk;
3713         struct pfkey_sock *pfk = pfkey_sk(sk);
3714         struct sk_buff *skb;
3715         int copied, err;
3716
3717         err = -EINVAL;
3718         if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3719                 goto out;
3720
3721         skb = skb_recv_datagram(sk, flags, &err);
3722         if (skb == NULL)
3723                 goto out;
3724
3725         copied = skb->len;
3726         if (copied > len) {
3727                 msg->msg_flags |= MSG_TRUNC;
3728                 copied = len;
3729         }
3730
3731         skb_reset_transport_header(skb);
3732         err = skb_copy_datagram_msg(skb, 0, msg, copied);
3733         if (err)
3734                 goto out_free;
3735
3736         sock_recv_cmsgs(msg, sk, skb);
3737
3738         err = (flags & MSG_TRUNC) ? skb->len : copied;
3739
3740         if (pfk->dump.dump != NULL &&
3741             3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3742                 pfkey_do_dump(pfk);
3743
3744 out_free:
3745         skb_free_datagram(sk, skb);
3746 out:
3747         return err;
3748 }
3749
3750 static const struct proto_ops pfkey_ops = {
3751         .family         =       PF_KEY,
3752         .owner          =       THIS_MODULE,
3753         /* Operations that make no sense on pfkey sockets. */
3754         .bind           =       sock_no_bind,
3755         .connect        =       sock_no_connect,
3756         .socketpair     =       sock_no_socketpair,
3757         .accept         =       sock_no_accept,
3758         .getname        =       sock_no_getname,
3759         .ioctl          =       sock_no_ioctl,
3760         .listen         =       sock_no_listen,
3761         .shutdown       =       sock_no_shutdown,
3762         .mmap           =       sock_no_mmap,
3763
3764         /* Now the operations that really occur. */
3765         .release        =       pfkey_release,
3766         .poll           =       datagram_poll,
3767         .sendmsg        =       pfkey_sendmsg,
3768         .recvmsg        =       pfkey_recvmsg,
3769 };
3770
3771 static const struct net_proto_family pfkey_family_ops = {
3772         .family =       PF_KEY,
3773         .create =       pfkey_create,
3774         .owner  =       THIS_MODULE,
3775 };
3776
3777 #ifdef CONFIG_PROC_FS
3778 static int pfkey_seq_show(struct seq_file *f, void *v)
3779 {
3780         struct sock *s = sk_entry(v);
3781
3782         if (v == SEQ_START_TOKEN)
3783                 seq_printf(f ,"sk       RefCnt Rmem   Wmem   User   Inode\n");
3784         else
3785                 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
3786                                s,
3787                                refcount_read(&s->sk_refcnt),
3788                                sk_rmem_alloc_get(s),
3789                                sk_wmem_alloc_get(s),
3790                                from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
3791                                sock_i_ino(s)
3792                                );
3793         return 0;
3794 }
3795
3796 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3797         __acquires(rcu)
3798 {
3799         struct net *net = seq_file_net(f);
3800         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3801
3802         rcu_read_lock();
3803         return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
3804 }
3805
3806 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3807 {
3808         struct net *net = seq_file_net(f);
3809         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3810
3811         return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
3812 }
3813
3814 static void pfkey_seq_stop(struct seq_file *f, void *v)
3815         __releases(rcu)
3816 {
3817         rcu_read_unlock();
3818 }
3819
3820 static const struct seq_operations pfkey_seq_ops = {
3821         .start  = pfkey_seq_start,
3822         .next   = pfkey_seq_next,
3823         .stop   = pfkey_seq_stop,
3824         .show   = pfkey_seq_show,
3825 };
3826
3827 static int __net_init pfkey_init_proc(struct net *net)
3828 {
3829         struct proc_dir_entry *e;
3830
3831         e = proc_create_net("pfkey", 0, net->proc_net, &pfkey_seq_ops,
3832                         sizeof(struct seq_net_private));
3833         if (e == NULL)
3834                 return -ENOMEM;
3835
3836         return 0;
3837 }
3838
3839 static void __net_exit pfkey_exit_proc(struct net *net)
3840 {
3841         remove_proc_entry("pfkey", net->proc_net);
3842 }
3843 #else
3844 static inline int pfkey_init_proc(struct net *net)
3845 {
3846         return 0;
3847 }
3848
3849 static inline void pfkey_exit_proc(struct net *net)
3850 {
3851 }
3852 #endif
3853
3854 static struct xfrm_mgr pfkeyv2_mgr =
3855 {
3856         .notify         = pfkey_send_notify,
3857         .acquire        = pfkey_send_acquire,
3858         .compile_policy = pfkey_compile_policy,
3859         .new_mapping    = pfkey_send_new_mapping,
3860         .notify_policy  = pfkey_send_policy_notify,
3861         .migrate        = pfkey_send_migrate,
3862         .is_alive       = pfkey_is_alive,
3863 };
3864
3865 static int __net_init pfkey_net_init(struct net *net)
3866 {
3867         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3868         int rv;
3869
3870         INIT_HLIST_HEAD(&net_pfkey->table);
3871         atomic_set(&net_pfkey->socks_nr, 0);
3872
3873         rv = pfkey_init_proc(net);
3874
3875         return rv;
3876 }
3877
3878 static void __net_exit pfkey_net_exit(struct net *net)
3879 {
3880         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3881
3882         pfkey_exit_proc(net);
3883         WARN_ON(!hlist_empty(&net_pfkey->table));
3884 }
3885
3886 static struct pernet_operations pfkey_net_ops = {
3887         .init = pfkey_net_init,
3888         .exit = pfkey_net_exit,
3889         .id   = &pfkey_net_id,
3890         .size = sizeof(struct netns_pfkey),
3891 };
3892
3893 static void __exit ipsec_pfkey_exit(void)
3894 {
3895         xfrm_unregister_km(&pfkeyv2_mgr);
3896         sock_unregister(PF_KEY);
3897         unregister_pernet_subsys(&pfkey_net_ops);
3898         proto_unregister(&key_proto);
3899 }
3900
3901 static int __init ipsec_pfkey_init(void)
3902 {
3903         int err = proto_register(&key_proto, 0);
3904
3905         if (err != 0)
3906                 goto out;
3907
3908         err = register_pernet_subsys(&pfkey_net_ops);
3909         if (err != 0)
3910                 goto out_unregister_key_proto;
3911         err = sock_register(&pfkey_family_ops);
3912         if (err != 0)
3913                 goto out_unregister_pernet;
3914         xfrm_register_km(&pfkeyv2_mgr);
3915 out:
3916         return err;
3917
3918 out_unregister_pernet:
3919         unregister_pernet_subsys(&pfkey_net_ops);
3920 out_unregister_key_proto:
3921         proto_unregister(&key_proto);
3922         goto out;
3923 }
3924
3925 module_init(ipsec_pfkey_init);
3926 module_exit(ipsec_pfkey_exit);
3927 MODULE_LICENSE("GPL");
3928 MODULE_ALIAS_NETPROTO(PF_KEY);