net/key/af_key.c

   1 /*
   2  * net/key/af_key.c     An implementation of PF_KEYv2 sockets.
   3  *
   4  *              This program is free software; you can redistribute it and/or
   5  *              modify it under the terms of the GNU General Public License
   6  *              as published by the Free Software Foundation; either version
   7  *              2 of the License, or (at your option) any later version.
   8  *
   9  * Authors:     Maxim Giryaev   <gem@asplinux.ru>
  10  *              David S. Miller <davem@redhat.com>
  11  *              Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
  12  *              Kunihiro Ishiguro <kunihiro@ipinfusion.com>
  13  *              Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
  14  *              Derek Atkins <derek@ihtfp.com>
  15  */
  16
  17 #include <linux/capability.h>
  18 #include <linux/module.h>
  19 #include <linux/kernel.h>
  20 #include <linux/socket.h>
  21 #include <linux/pfkeyv2.h>
  22 #include <linux/ipsec.h>
  23 #include <linux/skbuff.h>
  24 #include <linux/rtnetlink.h>
  25 #include <linux/in.h>
  26 #include <linux/in6.h>
  27 #include <linux/proc_fs.h>
  28 #include <linux/init.h>
  29 #include <linux/slab.h>
  30 #include <net/net_namespace.h>
  31 #include <net/netns/generic.h>
  32 #include <net/xfrm.h>
  33
  34 #include <net/sock.h>
  35
  36 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
  37 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
  38
  39 static unsigned int pfkey_net_id __read_mostly;
  40 struct netns_pfkey {
  41         /* List of all pfkey sockets. */
  42         struct hlist_head table;
  43         atomic_t socks_nr;
  44 };
  45 static DEFINE_MUTEX(pfkey_mutex);
  46
  47 #define DUMMY_MARK 0
  48 static const struct xfrm_mark dummy_mark = {0, 0};
  49 struct pfkey_sock {
  50         /* struct sock must be the first member of struct pfkey_sock */
  51         struct sock     sk;
  52         int             registered;
  53         int             promisc;
  54
  55         struct {
  56                 uint8_t         msg_version;
  57                 uint32_t        msg_portid;
  58                 int             (*dump)(struct pfkey_sock *sk);
  59                 void            (*done)(struct pfkey_sock *sk);
  60                 union {
  61                         struct xfrm_policy_walk policy;
  62                         struct xfrm_state_walk  state;
  63                 } u;
  64                 struct sk_buff  *skb;
  65         } dump;
  66         struct mutex dump_lock;
  67 };
  68
  69 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
  70                                xfrm_address_t *saddr, xfrm_address_t *daddr,
  71                                u16 *family);
  72
  73 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
  74 {
  75         return (struct pfkey_sock *)sk;
  76 }
  77
  78 static int pfkey_can_dump(const struct sock *sk)
  79 {
  80         if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
  81                 return 1;
  82         return 0;
  83 }
  84
  85 static void pfkey_terminate_dump(struct pfkey_sock *pfk)
  86 {
  87         if (pfk->dump.dump) {
  88                 if (pfk->dump.skb) {
  89                         kfree_skb(pfk->dump.skb);
  90                         pfk->dump.skb = NULL;
  91                 }
  92                 pfk->dump.done(pfk);
  93                 pfk->dump.dump = NULL;
  94                 pfk->dump.done = NULL;
  95         }
  96 }
  97
  98 static void pfkey_sock_destruct(struct sock *sk)
  99 {
 100         struct net *net = sock_net(sk);
 101         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
 102
 103         pfkey_terminate_dump(pfkey_sk(sk));
 104         skb_queue_purge(&sk->sk_receive_queue);
 105
 106         if (!sock_flag(sk, SOCK_DEAD)) {
 107                 pr_err("Attempt to release alive pfkey socket: %p\n", sk);
 108                 return;
 109         }
 110
 111         WARN_ON(atomic_read(&sk->sk_rmem_alloc));
 112         WARN_ON(refcount_read(&sk->sk_wmem_alloc));
 113
 114         atomic_dec(&net_pfkey->socks_nr);
 115 }
 116
 117 static const struct proto_ops pfkey_ops;
 118
 119 static void pfkey_insert(struct sock *sk)
 120 {
 121         struct net *net = sock_net(sk);
 122         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
 123
 124         mutex_lock(&pfkey_mutex);
 125         sk_add_node_rcu(sk, &net_pfkey->table);
 126         mutex_unlock(&pfkey_mutex);
 127 }
 128
 129 static void pfkey_remove(struct sock *sk)
 130 {
 131         mutex_lock(&pfkey_mutex);
 132         sk_del_node_init_rcu(sk);
 133         mutex_unlock(&pfkey_mutex);
 134 }
 135
 136 static struct proto key_proto = {
 137         .name     = "KEY",
 138         .owner    = THIS_MODULE,
 139         .obj_size = sizeof(struct pfkey_sock),
 140 };
 141
 142 static int pfkey_create(struct net *net, struct socket *sock, int protocol,
 143                         int kern)
 144 {
 145         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
 146         struct sock *sk;
 147         struct pfkey_sock *pfk;
 148         int err;
 149
 150         if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
 151                 return -EPERM;
 152         if (sock->type != SOCK_RAW)
 153                 return -ESOCKTNOSUPPORT;
 154         if (protocol != PF_KEY_V2)
 155                 return -EPROTONOSUPPORT;
 156
 157         err = -ENOMEM;
 158         sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto, kern);
 159         if (sk == NULL)
 160                 goto out;
 161
 162         pfk = pfkey_sk(sk);
 163         mutex_init(&pfk->dump_lock);
 164
 165         sock->ops = &pfkey_ops;
 166         sock_init_data(sock, sk);
 167
 168         sk->sk_family = PF_KEY;
 169         sk->sk_destruct = pfkey_sock_destruct;
 170
 171         atomic_inc(&net_pfkey->socks_nr);
 172
 173         pfkey_insert(sk);
 174
 175         return 0;
 176 out:
 177         return err;
 178 }
 179
 180 static int pfkey_release(struct socket *sock)
 181 {
 182         struct sock *sk = sock->sk;
 183
 184         if (!sk)
 185                 return 0;
 186
 187         pfkey_remove(sk);
 188
 189         sock_orphan(sk);
 190         sock->sk = NULL;
 191         skb_queue_purge(&sk->sk_write_queue);
 192
 193         synchronize_rcu();
 194         sock_put(sk);
 195
 196         return 0;
 197 }
 198
 199 static int pfkey_broadcast_one(struct sk_buff *skb, gfp_t allocation,
 200                                struct sock *sk)
 201 {
 202         int err = -ENOBUFS;
 203
 204         if (atomic_read(&sk->sk_rmem_alloc) > sk->sk_rcvbuf)
 205                 return err;
 206
 207         skb = skb_clone(skb, allocation);
 208
 209         if (skb) {
 210                 skb_set_owner_r(skb, sk);
 211                 skb_queue_tail(&sk->sk_receive_queue, skb);
 212                 sk->sk_data_ready(sk);
 213                 err = 0;
 214         }
 215         return err;
 216 }
 217
 218 /* Send SKB to all pfkey sockets matching selected criteria.  */
 219 #define BROADCAST_ALL           0
 220 #define BROADCAST_ONE           1
 221 #define BROADCAST_REGISTERED    2
 222 #define BROADCAST_PROMISC_ONLY  4
 223 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
 224                            int broadcast_flags, struct sock *one_sk,
 225                            struct net *net)
 226 {
 227         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
 228         struct sock *sk;
 229         int err = -ESRCH;
 230
 231         /* XXX Do we need something like netlink_overrun?  I think
 232          * XXX PF_KEY socket apps will not mind current behavior.
 233          */
 234         if (!skb)
 235                 return -ENOMEM;
 236
 237         rcu_read_lock();
 238         sk_for_each_rcu(sk, &net_pfkey->table) {
 239                 struct pfkey_sock *pfk = pfkey_sk(sk);
 240                 int err2;
 241
 242                 /* Yes, it means that if you are meant to receive this
 243                  * pfkey message you receive it twice as promiscuous
 244                  * socket.
 245                  */
 246                 if (pfk->promisc)
 247                         pfkey_broadcast_one(skb, GFP_ATOMIC, sk);
 248
 249                 /* the exact target will be processed later */
 250                 if (sk == one_sk)
 251                         continue;
 252                 if (broadcast_flags != BROADCAST_ALL) {
 253                         if (broadcast_flags & BROADCAST_PROMISC_ONLY)
 254                                 continue;
 255                         if ((broadcast_flags & BROADCAST_REGISTERED) &&
 256                             !pfk->registered)
 257                                 continue;
 258                         if (broadcast_flags & BROADCAST_ONE)
 259                                 continue;
 260                 }
 261
 262                 err2 = pfkey_broadcast_one(skb, GFP_ATOMIC, sk);
 263
 264                 /* Error is cleared after successful sending to at least one
 265                  * registered KM */
 266                 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
 267                         err = err2;
 268         }
 269         rcu_read_unlock();
 270
 271         if (one_sk != NULL)
 272                 err = pfkey_broadcast_one(skb, allocation, one_sk);
 273
 274         kfree_skb(skb);
 275         return err;
 276 }
 277
 278 static int pfkey_do_dump(struct pfkey_sock *pfk)
 279 {
 280         struct sadb_msg *hdr;
 281         int rc;
 282
 283         mutex_lock(&pfk->dump_lock);
 284         if (!pfk->dump.dump) {
 285                 rc = 0;
 286                 goto out;
 287         }
 288
 289         rc = pfk->dump.dump(pfk);
 290         if (rc == -ENOBUFS) {
 291                 rc = 0;
 292                 goto out;
 293         }
 294
 295         if (pfk->dump.skb) {
 296                 if (!pfkey_can_dump(&pfk->sk)) {
 297                         rc = 0;
 298                         goto out;
 299                 }
 300
 301                 hdr = (struct sadb_msg *) pfk->dump.skb->data;
 302                 hdr->sadb_msg_seq = 0;
 303                 hdr->sadb_msg_errno = rc;
 304                 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
 305                                 &pfk->sk, sock_net(&pfk->sk));
 306                 pfk->dump.skb = NULL;
 307         }
 308
 309         pfkey_terminate_dump(pfk);
 310
 311 out:
 312         mutex_unlock(&pfk->dump_lock);
 313         return rc;
 314 }
 315
 316 static inline void pfkey_hdr_dup(struct sadb_msg *new,
 317                                  const struct sadb_msg *orig)
 318 {
 319         *new = *orig;
 320 }
 321
 322 static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk)
 323 {
 324         struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
 325         struct sadb_msg *hdr;
 326
 327         if (!skb)
 328                 return -ENOBUFS;
 329
 330         /* Woe be to the platform trying to support PFKEY yet
 331          * having normal errnos outside the 1-255 range, inclusive.
 332          */
 333         err = -err;
 334         if (err == ERESTARTSYS ||
 335             err == ERESTARTNOHAND ||
 336             err == ERESTARTNOINTR)
 337                 err = EINTR;
 338         if (err >= 512)
 339                 err = EINVAL;
 340         BUG_ON(err <= 0 || err >= 256);
 341
 342         hdr = skb_put(skb, sizeof(struct sadb_msg));
 343         pfkey_hdr_dup(hdr, orig);
 344         hdr->sadb_msg_errno = (uint8_t) err;
 345         hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
 346                              sizeof(uint64_t));
 347
 348         pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk));
 349
 350         return 0;
 351 }
 352
 353 static const u8 sadb_ext_min_len[] = {
 354         [SADB_EXT_RESERVED]             = (u8) 0,
 355         [SADB_EXT_SA]                   = (u8) sizeof(struct sadb_sa),
 356         [SADB_EXT_LIFETIME_CURRENT]     = (u8) sizeof(struct sadb_lifetime),
 357         [SADB_EXT_LIFETIME_HARD]        = (u8) sizeof(struct sadb_lifetime),
 358         [SADB_EXT_LIFETIME_SOFT]        = (u8) sizeof(struct sadb_lifetime),
 359         [SADB_EXT_ADDRESS_SRC]          = (u8) sizeof(struct sadb_address),
 360         [SADB_EXT_ADDRESS_DST]          = (u8) sizeof(struct sadb_address),
 361         [SADB_EXT_ADDRESS_PROXY]        = (u8) sizeof(struct sadb_address),
 362         [SADB_EXT_KEY_AUTH]             = (u8) sizeof(struct sadb_key),
 363         [SADB_EXT_KEY_ENCRYPT]          = (u8) sizeof(struct sadb_key),
 364         [SADB_EXT_IDENTITY_SRC]         = (u8) sizeof(struct sadb_ident),
 365         [SADB_EXT_IDENTITY_DST]         = (u8) sizeof(struct sadb_ident),
 366         [SADB_EXT_SENSITIVITY]          = (u8) sizeof(struct sadb_sens),
 367         [SADB_EXT_PROPOSAL]             = (u8) sizeof(struct sadb_prop),
 368         [SADB_EXT_SUPPORTED_AUTH]       = (u8) sizeof(struct sadb_supported),
 369         [SADB_EXT_SUPPORTED_ENCRYPT]    = (u8) sizeof(struct sadb_supported),
 370         [SADB_EXT_SPIRANGE]             = (u8) sizeof(struct sadb_spirange),
 371         [SADB_X_EXT_KMPRIVATE]          = (u8) sizeof(struct sadb_x_kmprivate),
 372         [SADB_X_EXT_POLICY]             = (u8) sizeof(struct sadb_x_policy),
 373         [SADB_X_EXT_SA2]                = (u8) sizeof(struct sadb_x_sa2),
 374         [SADB_X_EXT_NAT_T_TYPE]         = (u8) sizeof(struct sadb_x_nat_t_type),
 375         [SADB_X_EXT_NAT_T_SPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
 376         [SADB_X_EXT_NAT_T_DPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
 377         [SADB_X_EXT_NAT_T_OA]           = (u8) sizeof(struct sadb_address),
 378         [SADB_X_EXT_SEC_CTX]            = (u8) sizeof(struct sadb_x_sec_ctx),
 379         [SADB_X_EXT_KMADDRESS]          = (u8) sizeof(struct sadb_x_kmaddress),
 380         [SADB_X_EXT_FILTER]             = (u8) sizeof(struct sadb_x_filter),
 381 };
 382
 383 /* Verify sadb_address_{len,prefixlen} against sa_family.  */
 384 static int verify_address_len(const void *p)
 385 {
 386         const struct sadb_address *sp = p;
 387         const struct sockaddr *addr = (const struct sockaddr *)(sp + 1);
 388         const struct sockaddr_in *sin;
 389 #if IS_ENABLED(CONFIG_IPV6)
 390         const struct sockaddr_in6 *sin6;
 391 #endif
 392         int len;
 393
 394         if (sp->sadb_address_len <
 395             DIV_ROUND_UP(sizeof(*sp) + offsetofend(typeof(*addr), sa_family),
 396                          sizeof(uint64_t)))
 397                 return -EINVAL;
 398
 399         switch (addr->sa_family) {
 400         case AF_INET:
 401                 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
 402                 if (sp->sadb_address_len != len ||
 403                     sp->sadb_address_prefixlen > 32)
 404                         return -EINVAL;
 405                 break;
 406 #if IS_ENABLED(CONFIG_IPV6)
 407         case AF_INET6:
 408                 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
 409                 if (sp->sadb_address_len != len ||
 410                     sp->sadb_address_prefixlen > 128)
 411                         return -EINVAL;
 412                 break;
 413 #endif
 414         default:
 415                 /* It is user using kernel to keep track of security
 416                  * associations for another protocol, such as
 417                  * OSPF/RSVP/RIPV2/MIP.  It is user's job to verify
 418                  * lengths.
 419                  *
 420                  * XXX Actually, association/policy database is not yet
 421                  * XXX able to cope with arbitrary sockaddr families.
 422                  * XXX When it can, remove this -EINVAL.  -DaveM
 423                  */
 424                 return -EINVAL;
 425         }
 426
 427         return 0;
 428 }
 429
 430 static inline int sadb_key_len(const struct sadb_key *key)
 431 {
 432         int key_bytes = DIV_ROUND_UP(key->sadb_key_bits, 8);
 433
 434         return DIV_ROUND_UP(sizeof(struct sadb_key) + key_bytes,
 435                             sizeof(uint64_t));
 436 }
 437
 438 static int verify_key_len(const void *p)
 439 {
 440         const struct sadb_key *key = p;
 441
 442         if (sadb_key_len(key) > key->sadb_key_len)
 443                 return -EINVAL;
 444
 445         return 0;
 446 }
 447
 448 static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx)
 449 {
 450         return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
 451                             sec_ctx->sadb_x_ctx_len,
 452                             sizeof(uint64_t));
 453 }
 454
 455 static inline int verify_sec_ctx_len(const void *p)
 456 {
 457         const struct sadb_x_sec_ctx *sec_ctx = p;
 458         int len = sec_ctx->sadb_x_ctx_len;
 459
 460         if (len > PAGE_SIZE)
 461                 return -EINVAL;
 462
 463         len = pfkey_sec_ctx_len(sec_ctx);
 464
 465         if (sec_ctx->sadb_x_sec_len != len)
 466                 return -EINVAL;
 467
 468         return 0;
 469 }
 470
 471 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx,
 472                                                                      gfp_t gfp)
 473 {
 474         struct xfrm_user_sec_ctx *uctx = NULL;
 475         int ctx_size = sec_ctx->sadb_x_ctx_len;
 476
 477         uctx = kmalloc((sizeof(*uctx)+ctx_size), gfp);
 478
 479         if (!uctx)
 480                 return NULL;
 481
 482         uctx->len = pfkey_sec_ctx_len(sec_ctx);
 483         uctx->exttype = sec_ctx->sadb_x_sec_exttype;
 484         uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
 485         uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
 486         uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
 487         memcpy(uctx + 1, sec_ctx + 1,
 488                uctx->ctx_len);
 489
 490         return uctx;
 491 }
 492
 493 static int present_and_same_family(const struct sadb_address *src,
 494                                    const struct sadb_address *dst)
 495 {
 496         const struct sockaddr *s_addr, *d_addr;
 497
 498         if (!src || !dst)
 499                 return 0;
 500
 501         s_addr = (const struct sockaddr *)(src + 1);
 502         d_addr = (const struct sockaddr *)(dst + 1);
 503         if (s_addr->sa_family != d_addr->sa_family)
 504                 return 0;
 505         if (s_addr->sa_family != AF_INET
 506 #if IS_ENABLED(CONFIG_IPV6)
 507             && s_addr->sa_family != AF_INET6
 508 #endif
 509                 )
 510                 return 0;
 511
 512         return 1;
 513 }
 514
 515 static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs)
 516 {
 517         const char *p = (char *) hdr;
 518         int len = skb->len;
 519
 520         len -= sizeof(*hdr);
 521         p += sizeof(*hdr);
 522         while (len > 0) {
 523                 const struct sadb_ext *ehdr = (const struct sadb_ext *) p;
 524                 uint16_t ext_type;
 525                 int ext_len;
 526
 527                 if (len < sizeof(*ehdr))
 528                         return -EINVAL;
 529
 530                 ext_len  = ehdr->sadb_ext_len;
 531                 ext_len *= sizeof(uint64_t);
 532                 ext_type = ehdr->sadb_ext_type;
 533                 if (ext_len < sizeof(uint64_t) ||
 534                     ext_len > len ||
 535                     ext_type == SADB_EXT_RESERVED)
 536                         return -EINVAL;
 537
 538                 if (ext_type <= SADB_EXT_MAX) {
 539                         int min = (int) sadb_ext_min_len[ext_type];
 540                         if (ext_len < min)
 541                                 return -EINVAL;
 542                         if (ext_hdrs[ext_type-1] != NULL)
 543                                 return -EINVAL;
 544                         switch (ext_type) {
 545                         case SADB_EXT_ADDRESS_SRC:
 546                         case SADB_EXT_ADDRESS_DST:
 547                         case SADB_EXT_ADDRESS_PROXY:
 548                         case SADB_X_EXT_NAT_T_OA:
 549                                 if (verify_address_len(p))
 550                                         return -EINVAL;
 551                                 break;
 552                         case SADB_X_EXT_SEC_CTX:
 553                                 if (verify_sec_ctx_len(p))
 554                                         return -EINVAL;
 555                                 break;
 556                         case SADB_EXT_KEY_AUTH:
 557                         case SADB_EXT_KEY_ENCRYPT:
 558                                 if (verify_key_len(p))
 559                                         return -EINVAL;
 560                                 break;
 561                         default:
 562                                 break;
 563                         }
 564                         ext_hdrs[ext_type-1] = (void *) p;
 565                 }
 566                 p   += ext_len;
 567                 len -= ext_len;
 568         }
 569
 570         return 0;
 571 }
 572
 573 static uint16_t
 574 pfkey_satype2proto(uint8_t satype)
 575 {
 576         switch (satype) {
 577         case SADB_SATYPE_UNSPEC:
 578                 return IPSEC_PROTO_ANY;
 579         case SADB_SATYPE_AH:
 580                 return IPPROTO_AH;
 581         case SADB_SATYPE_ESP:
 582                 return IPPROTO_ESP;
 583         case SADB_X_SATYPE_IPCOMP:
 584                 return IPPROTO_COMP;
 585         default:
 586                 return 0;
 587         }
 588         /* NOTREACHED */
 589 }
 590
 591 static uint8_t
 592 pfkey_proto2satype(uint16_t proto)
 593 {
 594         switch (proto) {
 595         case IPPROTO_AH:
 596                 return SADB_SATYPE_AH;
 597         case IPPROTO_ESP:
 598                 return SADB_SATYPE_ESP;
 599         case IPPROTO_COMP:
 600                 return SADB_X_SATYPE_IPCOMP;
 601         default:
 602                 return 0;
 603         }
 604         /* NOTREACHED */
 605 }
 606
 607 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
 608  * say specifically 'just raw sockets' as we encode them as 255.
 609  */
 610
 611 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
 612 {
 613         return proto == IPSEC_PROTO_ANY ? 0 : proto;
 614 }
 615
 616 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
 617 {
 618         return proto ? proto : IPSEC_PROTO_ANY;
 619 }
 620
 621 static inline int pfkey_sockaddr_len(sa_family_t family)
 622 {
 623         switch (family) {
 624         case AF_INET:
 625                 return sizeof(struct sockaddr_in);
 626 #if IS_ENABLED(CONFIG_IPV6)
 627         case AF_INET6:
 628                 return sizeof(struct sockaddr_in6);
 629 #endif
 630         }
 631         return 0;
 632 }
 633
 634 static
 635 int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
 636 {
 637         switch (sa->sa_family) {
 638         case AF_INET:
 639                 xaddr->a4 =
 640                         ((struct sockaddr_in *)sa)->sin_addr.s_addr;
 641                 return AF_INET;
 642 #if IS_ENABLED(CONFIG_IPV6)
 643         case AF_INET6:
 644                 memcpy(xaddr->a6,
 645                        &((struct sockaddr_in6 *)sa)->sin6_addr,
 646                        sizeof(struct in6_addr));
 647                 return AF_INET6;
 648 #endif
 649         }
 650         return 0;
 651 }
 652
 653 static
 654 int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr)
 655 {
 656         return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
 657                                       xaddr);
 658 }
 659
 660 static struct  xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs)
 661 {
 662         const struct sadb_sa *sa;
 663         const struct sadb_address *addr;
 664         uint16_t proto;
 665         unsigned short family;
 666         xfrm_address_t *xaddr;
 667
 668         sa = ext_hdrs[SADB_EXT_SA - 1];
 669         if (sa == NULL)
 670                 return NULL;
 671
 672         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
 673         if (proto == 0)
 674                 return NULL;
 675
 676         /* sadb_address_len should be checked by caller */
 677         addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
 678         if (addr == NULL)
 679                 return NULL;
 680
 681         family = ((const struct sockaddr *)(addr + 1))->sa_family;
 682         switch (family) {
 683         case AF_INET:
 684                 xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr;
 685                 break;
 686 #if IS_ENABLED(CONFIG_IPV6)
 687         case AF_INET6:
 688                 xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr;
 689                 break;
 690 #endif
 691         default:
 692                 xaddr = NULL;
 693         }
 694
 695         if (!xaddr)
 696                 return NULL;
 697
 698         return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family);
 699 }
 700
 701 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
 702
 703 static int
 704 pfkey_sockaddr_size(sa_family_t family)
 705 {
 706         return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
 707 }
 708
 709 static inline int pfkey_mode_from_xfrm(int mode)
 710 {
 711         switch(mode) {
 712         case XFRM_MODE_TRANSPORT:
 713                 return IPSEC_MODE_TRANSPORT;
 714         case XFRM_MODE_TUNNEL:
 715                 return IPSEC_MODE_TUNNEL;
 716         case XFRM_MODE_BEET:
 717                 return IPSEC_MODE_BEET;
 718         default:
 719                 return -1;
 720         }
 721 }
 722
 723 static inline int pfkey_mode_to_xfrm(int mode)
 724 {
 725         switch(mode) {
 726         case IPSEC_MODE_ANY:    /*XXX*/
 727         case IPSEC_MODE_TRANSPORT:
 728                 return XFRM_MODE_TRANSPORT;
 729         case IPSEC_MODE_TUNNEL:
 730                 return XFRM_MODE_TUNNEL;
 731         case IPSEC_MODE_BEET:
 732                 return XFRM_MODE_BEET;
 733         default:
 734                 return -1;
 735         }
 736 }
 737
 738 static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port,
 739                                         struct sockaddr *sa,
 740                                         unsigned short family)
 741 {
 742         switch (family) {
 743         case AF_INET:
 744             {
 745                 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 746                 sin->sin_family = AF_INET;
 747                 sin->sin_port = port;
 748                 sin->sin_addr.s_addr = xaddr->a4;
 749                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
 750                 return 32;
 751             }
 752 #if IS_ENABLED(CONFIG_IPV6)
 753         case AF_INET6:
 754             {
 755                 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 756                 sin6->sin6_family = AF_INET6;
 757                 sin6->sin6_port = port;
 758                 sin6->sin6_flowinfo = 0;
 759                 sin6->sin6_addr = xaddr->in6;
 760                 sin6->sin6_scope_id = 0;
 761                 return 128;
 762             }
 763 #endif
 764         }
 765         return 0;
 766 }
 767
 768 static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x,
 769                                               int add_keys, int hsc)
 770 {
 771         struct sk_buff *skb;
 772         struct sadb_msg *hdr;
 773         struct sadb_sa *sa;
 774         struct sadb_lifetime *lifetime;
 775         struct sadb_address *addr;
 776         struct sadb_key *key;
 777         struct sadb_x_sa2 *sa2;
 778         struct sadb_x_sec_ctx *sec_ctx;
 779         struct xfrm_sec_ctx *xfrm_ctx;
 780         int ctx_size = 0;
 781         int size;
 782         int auth_key_size = 0;
 783         int encrypt_key_size = 0;
 784         int sockaddr_size;
 785         struct xfrm_encap_tmpl *natt = NULL;
 786         int mode;
 787
 788         /* address family check */
 789         sockaddr_size = pfkey_sockaddr_size(x->props.family);
 790         if (!sockaddr_size)
 791                 return ERR_PTR(-EINVAL);
 792
 793         /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
 794            key(AE), (identity(SD),) (sensitivity)> */
 795         size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
 796                 sizeof(struct sadb_lifetime) +
 797                 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
 798                 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
 799                         sizeof(struct sadb_address)*2 +
 800                                 sockaddr_size*2 +
 801                                         sizeof(struct sadb_x_sa2);
 802
 803         if ((xfrm_ctx = x->security)) {
 804                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
 805                 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
 806         }
 807
 808         /* identity & sensitivity */
 809         if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family))
 810                 size += sizeof(struct sadb_address) + sockaddr_size;
 811
 812         if (add_keys) {
 813                 if (x->aalg && x->aalg->alg_key_len) {
 814                         auth_key_size =
 815                                 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
 816                         size += sizeof(struct sadb_key) + auth_key_size;
 817                 }
 818                 if (x->ealg && x->ealg->alg_key_len) {
 819                         encrypt_key_size =
 820                                 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
 821                         size += sizeof(struct sadb_key) + encrypt_key_size;
 822                 }
 823         }
 824         if (x->encap)
 825                 natt = x->encap;
 826
 827         if (natt && natt->encap_type) {
 828                 size += sizeof(struct sadb_x_nat_t_type);
 829                 size += sizeof(struct sadb_x_nat_t_port);
 830                 size += sizeof(struct sadb_x_nat_t_port);
 831         }
 832
 833         skb =  alloc_skb(size + 16, GFP_ATOMIC);
 834         if (skb == NULL)
 835                 return ERR_PTR(-ENOBUFS);
 836
 837         /* call should fill header later */
 838         hdr = skb_put(skb, sizeof(struct sadb_msg));
 839         memset(hdr, 0, size);   /* XXX do we need this ? */
 840         hdr->sadb_msg_len = size / sizeof(uint64_t);
 841
 842         /* sa */
 843         sa = skb_put(skb, sizeof(struct sadb_sa));
 844         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
 845         sa->sadb_sa_exttype = SADB_EXT_SA;
 846         sa->sadb_sa_spi = x->id.spi;
 847         sa->sadb_sa_replay = x->props.replay_window;
 848         switch (x->km.state) {
 849         case XFRM_STATE_VALID:
 850                 sa->sadb_sa_state = x->km.dying ?
 851                         SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
 852                 break;
 853         case XFRM_STATE_ACQ:
 854                 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
 855                 break;
 856         default:
 857                 sa->sadb_sa_state = SADB_SASTATE_DEAD;
 858                 break;
 859         }
 860         sa->sadb_sa_auth = 0;
 861         if (x->aalg) {
 862                 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
 863                 sa->sadb_sa_auth = (a && a->pfkey_supported) ?
 864                                         a->desc.sadb_alg_id : 0;
 865         }
 866         sa->sadb_sa_encrypt = 0;
 867         BUG_ON(x->ealg && x->calg);
 868         if (x->ealg) {
 869                 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
 870                 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
 871                                         a->desc.sadb_alg_id : 0;
 872         }
 873         /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
 874         if (x->calg) {
 875                 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
 876                 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
 877                                         a->desc.sadb_alg_id : 0;
 878         }
 879
 880         sa->sadb_sa_flags = 0;
 881         if (x->props.flags & XFRM_STATE_NOECN)
 882                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
 883         if (x->props.flags & XFRM_STATE_DECAP_DSCP)
 884                 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
 885         if (x->props.flags & XFRM_STATE_NOPMTUDISC)
 886                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
 887
 888         /* hard time */
 889         if (hsc & 2) {
 890                 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
 891                 lifetime->sadb_lifetime_len =
 892                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 893                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
 894                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.hard_packet_limit);
 895                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
 896                 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
 897                 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
 898         }
 899         /* soft time */
 900         if (hsc & 1) {
 901                 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
 902                 lifetime->sadb_lifetime_len =
 903                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 904                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
 905                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.soft_packet_limit);
 906                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
 907                 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
 908                 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
 909         }
 910         /* current time */
 911         lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
 912         lifetime->sadb_lifetime_len =
 913                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 914         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
 915         lifetime->sadb_lifetime_allocations = x->curlft.packets;
 916         lifetime->sadb_lifetime_bytes = x->curlft.bytes;
 917         lifetime->sadb_lifetime_addtime = x->curlft.add_time;
 918         lifetime->sadb_lifetime_usetime = x->curlft.use_time;
 919         /* src address */
 920         addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
 921         addr->sadb_address_len =
 922                 (sizeof(struct sadb_address)+sockaddr_size)/
 923                         sizeof(uint64_t);
 924         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
 925         /* "if the ports are non-zero, then the sadb_address_proto field,
 926            normally zero, MUST be filled in with the transport
 927            protocol's number." - RFC2367 */
 928         addr->sadb_address_proto = 0;
 929         addr->sadb_address_reserved = 0;
 930
 931         addr->sadb_address_prefixlen =
 932                 pfkey_sockaddr_fill(&x->props.saddr, 0,
 933                                     (struct sockaddr *) (addr + 1),
 934                                     x->props.family);
 935         if (!addr->sadb_address_prefixlen)
 936                 BUG();
 937
 938         /* dst address */
 939         addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
 940         addr->sadb_address_len =
 941                 (sizeof(struct sadb_address)+sockaddr_size)/
 942                         sizeof(uint64_t);
 943         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
 944         addr->sadb_address_proto = 0;
 945         addr->sadb_address_reserved = 0;
 946
 947         addr->sadb_address_prefixlen =
 948                 pfkey_sockaddr_fill(&x->id.daddr, 0,
 949                                     (struct sockaddr *) (addr + 1),
 950                                     x->props.family);
 951         if (!addr->sadb_address_prefixlen)
 952                 BUG();
 953
 954         if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr,
 955                              x->props.family)) {
 956                 addr = skb_put(skb,
 957                                sizeof(struct sadb_address) + sockaddr_size);
 958                 addr->sadb_address_len =
 959                         (sizeof(struct sadb_address)+sockaddr_size)/
 960                         sizeof(uint64_t);
 961                 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
 962                 addr->sadb_address_proto =
 963                         pfkey_proto_from_xfrm(x->sel.proto);
 964                 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
 965                 addr->sadb_address_reserved = 0;
 966
 967                 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
 968                                     (struct sockaddr *) (addr + 1),
 969                                     x->props.family);
 970         }
 971
 972         /* auth key */
 973         if (add_keys && auth_key_size) {
 974                 key = skb_put(skb, sizeof(struct sadb_key) + auth_key_size);
 975                 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
 976                         sizeof(uint64_t);
 977                 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
 978                 key->sadb_key_bits = x->aalg->alg_key_len;
 979                 key->sadb_key_reserved = 0;
 980                 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
 981         }
 982         /* encrypt key */
 983         if (add_keys && encrypt_key_size) {
 984                 key = skb_put(skb, sizeof(struct sadb_key) + encrypt_key_size);
 985                 key->sadb_key_len = (sizeof(struct sadb_key) +
 986                                      encrypt_key_size) / sizeof(uint64_t);
 987                 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
 988                 key->sadb_key_bits = x->ealg->alg_key_len;
 989                 key->sadb_key_reserved = 0;
 990                 memcpy(key + 1, x->ealg->alg_key,
 991                        (x->ealg->alg_key_len+7)/8);
 992         }
 993
 994         /* sa */
 995         sa2 = skb_put(skb, sizeof(struct sadb_x_sa2));
 996         sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
 997         sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
 998         if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
 999                 kfree_skb(skb);
1000                 return ERR_PTR(-EINVAL);
1001         }
1002         sa2->sadb_x_sa2_mode = mode;
1003         sa2->sadb_x_sa2_reserved1 = 0;
1004         sa2->sadb_x_sa2_reserved2 = 0;
1005         sa2->sadb_x_sa2_sequence = 0;
1006         sa2->sadb_x_sa2_reqid = x->props.reqid;
1007
1008         if (natt && natt->encap_type) {
1009                 struct sadb_x_nat_t_type *n_type;
1010                 struct sadb_x_nat_t_port *n_port;
1011
1012                 /* type */
1013                 n_type = skb_put(skb, sizeof(*n_type));
1014                 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
1015                 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
1016                 n_type->sadb_x_nat_t_type_type = natt->encap_type;
1017                 n_type->sadb_x_nat_t_type_reserved[0] = 0;
1018                 n_type->sadb_x_nat_t_type_reserved[1] = 0;
1019                 n_type->sadb_x_nat_t_type_reserved[2] = 0;
1020
1021                 /* source port */
1022                 n_port = skb_put(skb, sizeof(*n_port));
1023                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1024                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
1025                 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
1026                 n_port->sadb_x_nat_t_port_reserved = 0;
1027
1028                 /* dest port */
1029                 n_port = skb_put(skb, sizeof(*n_port));
1030                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1031                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
1032                 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
1033                 n_port->sadb_x_nat_t_port_reserved = 0;
1034         }
1035
1036         /* security context */
1037         if (xfrm_ctx) {
1038                 sec_ctx = skb_put(skb,
1039                                   sizeof(struct sadb_x_sec_ctx) + ctx_size);
1040                 sec_ctx->sadb_x_sec_len =
1041                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1042                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1043                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1044                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1045                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1046                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1047                        xfrm_ctx->ctx_len);
1048         }
1049
1050         return skb;
1051 }
1052
1053
1054 static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x)
1055 {
1056         struct sk_buff *skb;
1057
1058         skb = __pfkey_xfrm_state2msg(x, 1, 3);
1059
1060         return skb;
1061 }
1062
1063 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x,
1064                                                           int hsc)
1065 {
1066         return __pfkey_xfrm_state2msg(x, 0, hsc);
1067 }
1068
1069 static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
1070                                                 const struct sadb_msg *hdr,
1071                                                 void * const *ext_hdrs)
1072 {
1073         struct xfrm_state *x;
1074         const struct sadb_lifetime *lifetime;
1075         const struct sadb_sa *sa;
1076         const struct sadb_key *key;
1077         const struct sadb_x_sec_ctx *sec_ctx;
1078         uint16_t proto;
1079         int err;
1080
1081
1082         sa = ext_hdrs[SADB_EXT_SA - 1];
1083         if (!sa ||
1084             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1085                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1086                 return ERR_PTR(-EINVAL);
1087         if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1088             !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1089                 return ERR_PTR(-EINVAL);
1090         if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1091             !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1092                 return ERR_PTR(-EINVAL);
1093         if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1094             !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1095                 return ERR_PTR(-EINVAL);
1096
1097         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1098         if (proto == 0)
1099                 return ERR_PTR(-EINVAL);
1100
1101         /* default error is no buffer space */
1102         err = -ENOBUFS;
1103
1104         /* RFC2367:
1105
1106    Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1107    SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1108    sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1109    Therefore, the sadb_sa_state field of all submitted SAs MUST be
1110    SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1111    not true.
1112
1113            However, KAME setkey always uses SADB_SASTATE_LARVAL.
1114            Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1115          */
1116         if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1117             (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1118              sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1119             sa->sadb_sa_encrypt > SADB_EALG_MAX)
1120                 return ERR_PTR(-EINVAL);
1121         key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1122         if (key != NULL &&
1123             sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1124             key->sadb_key_bits == 0)
1125                 return ERR_PTR(-EINVAL);
1126         key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1127         if (key != NULL &&
1128             sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1129             key->sadb_key_bits == 0)
1130                 return ERR_PTR(-EINVAL);
1131
1132         x = xfrm_state_alloc(net);
1133         if (x == NULL)
1134                 return ERR_PTR(-ENOBUFS);
1135
1136         x->id.proto = proto;
1137         x->id.spi = sa->sadb_sa_spi;
1138         x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay,
1139                                         (sizeof(x->replay.bitmap) * 8));
1140         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1141                 x->props.flags |= XFRM_STATE_NOECN;
1142         if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1143                 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1144         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1145                 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1146
1147         lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1];
1148         if (lifetime != NULL) {
1149                 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1150                 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1151                 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1152                 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1153         }
1154         lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1];
1155         if (lifetime != NULL) {
1156                 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1157                 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1158                 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1159                 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1160         }
1161
1162         sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
1163         if (sec_ctx != NULL) {
1164                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
1165
1166                 if (!uctx)
1167                         goto out;
1168
1169                 err = security_xfrm_state_alloc(x, uctx);
1170                 kfree(uctx);
1171
1172                 if (err)
1173                         goto out;
1174         }
1175
1176         err = -ENOBUFS;
1177         key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1178         if (sa->sadb_sa_auth) {
1179                 int keysize = 0;
1180                 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1181                 if (!a || !a->pfkey_supported) {
1182                         err = -ENOSYS;
1183                         goto out;
1184                 }
1185                 if (key)
1186                         keysize = (key->sadb_key_bits + 7) / 8;
1187                 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1188                 if (!x->aalg) {
1189                         err = -ENOMEM;
1190                         goto out;
1191                 }
1192                 strcpy(x->aalg->alg_name, a->name);
1193                 x->aalg->alg_key_len = 0;
1194                 if (key) {
1195                         x->aalg->alg_key_len = key->sadb_key_bits;
1196                         memcpy(x->aalg->alg_key, key+1, keysize);
1197                 }
1198                 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1199                 x->props.aalgo = sa->sadb_sa_auth;
1200                 /* x->algo.flags = sa->sadb_sa_flags; */
1201         }
1202         if (sa->sadb_sa_encrypt) {
1203                 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1204                         struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1205                         if (!a || !a->pfkey_supported) {
1206                                 err = -ENOSYS;
1207                                 goto out;
1208                         }
1209                         x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1210                         if (!x->calg) {
1211                                 err = -ENOMEM;
1212                                 goto out;
1213                         }
1214                         strcpy(x->calg->alg_name, a->name);
1215                         x->props.calgo = sa->sadb_sa_encrypt;
1216                 } else {
1217                         int keysize = 0;
1218                         struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1219                         if (!a || !a->pfkey_supported) {
1220                                 err = -ENOSYS;
1221                                 goto out;
1222                         }
1223                         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1224                         if (key)
1225                                 keysize = (key->sadb_key_bits + 7) / 8;
1226                         x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1227                         if (!x->ealg) {
1228                                 err = -ENOMEM;
1229                                 goto out;
1230                         }
1231                         strcpy(x->ealg->alg_name, a->name);
1232                         x->ealg->alg_key_len = 0;
1233                         if (key) {
1234                                 x->ealg->alg_key_len = key->sadb_key_bits;
1235                                 memcpy(x->ealg->alg_key, key+1, keysize);
1236                         }
1237                         x->props.ealgo = sa->sadb_sa_encrypt;
1238                         x->geniv = a->uinfo.encr.geniv;
1239                 }
1240         }
1241         /* x->algo.flags = sa->sadb_sa_flags; */
1242
1243         x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1244                                                     &x->props.saddr);
1245         pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1246                                   &x->id.daddr);
1247
1248         if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1249                 const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
1250                 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1251                 if (mode < 0) {
1252                         err = -EINVAL;
1253                         goto out;
1254                 }
1255                 x->props.mode = mode;
1256                 x->props.reqid = sa2->sadb_x_sa2_reqid;
1257         }
1258
1259         if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1260                 const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1261
1262                 /* Nobody uses this, but we try. */
1263                 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1264                 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1265         }
1266
1267         if (!x->sel.family)
1268                 x->sel.family = x->props.family;
1269
1270         if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1271                 const struct sadb_x_nat_t_type* n_type;
1272                 struct xfrm_encap_tmpl *natt;
1273
1274                 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1275                 if (!x->encap) {
1276                         err = -ENOMEM;
1277                         goto out;
1278                 }
1279
1280                 natt = x->encap;
1281                 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1282                 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1283
1284                 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1285                         const struct sadb_x_nat_t_port *n_port =
1286                                 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1287                         natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1288                 }
1289                 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1290                         const struct sadb_x_nat_t_port *n_port =
1291                                 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1292                         natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1293                 }
1294                 memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
1295         }
1296
1297         err = xfrm_init_state(x);
1298         if (err)
1299                 goto out;
1300
1301         x->km.seq = hdr->sadb_msg_seq;
1302         return x;
1303
1304 out:
1305         x->km.state = XFRM_STATE_DEAD;
1306         xfrm_state_put(x);
1307         return ERR_PTR(err);
1308 }
1309
1310 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1311 {
1312         return -EOPNOTSUPP;
1313 }
1314
1315 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1316 {
1317         struct net *net = sock_net(sk);
1318         struct sk_buff *resp_skb;
1319         struct sadb_x_sa2 *sa2;
1320         struct sadb_address *saddr, *daddr;
1321         struct sadb_msg *out_hdr;
1322         struct sadb_spirange *range;
1323         struct xfrm_state *x = NULL;
1324         int mode;
1325         int err;
1326         u32 min_spi, max_spi;
1327         u32 reqid;
1328         u8 proto;
1329         unsigned short family;
1330         xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1331
1332         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1333                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1334                 return -EINVAL;
1335
1336         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1337         if (proto == 0)
1338                 return -EINVAL;
1339
1340         if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1341                 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1342                 if (mode < 0)
1343                         return -EINVAL;
1344                 reqid = sa2->sadb_x_sa2_reqid;
1345         } else {
1346                 mode = 0;
1347                 reqid = 0;
1348         }
1349
1350         saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1351         daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1352
1353         family = ((struct sockaddr *)(saddr + 1))->sa_family;
1354         switch (family) {
1355         case AF_INET:
1356                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1357                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1358                 break;
1359 #if IS_ENABLED(CONFIG_IPV6)
1360         case AF_INET6:
1361                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1362                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1363                 break;
1364 #endif
1365         }
1366
1367         if (hdr->sadb_msg_seq) {
1368                 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1369                 if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) {
1370                         xfrm_state_put(x);
1371                         x = NULL;
1372                 }
1373         }
1374
1375         if (!x)
1376                 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family);
1377
1378         if (x == NULL)
1379                 return -ENOENT;
1380
1381         min_spi = 0x100;
1382         max_spi = 0x0fffffff;
1383
1384         range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1385         if (range) {
1386                 min_spi = range->sadb_spirange_min;
1387                 max_spi = range->sadb_spirange_max;
1388         }
1389
1390         err = verify_spi_info(x->id.proto, min_spi, max_spi);
1391         if (err) {
1392                 xfrm_state_put(x);
1393                 return err;
1394         }
1395
1396         err = xfrm_alloc_spi(x, min_spi, max_spi);
1397         resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1398
1399         if (IS_ERR(resp_skb)) {
1400                 xfrm_state_put(x);
1401                 return  PTR_ERR(resp_skb);
1402         }
1403
1404         out_hdr = (struct sadb_msg *) resp_skb->data;
1405         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1406         out_hdr->sadb_msg_type = SADB_GETSPI;
1407         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1408         out_hdr->sadb_msg_errno = 0;
1409         out_hdr->sadb_msg_reserved = 0;
1410         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1411         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1412
1413         xfrm_state_put(x);
1414
1415         pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
1416
1417         return 0;
1418 }
1419
1420 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1421 {
1422         struct net *net = sock_net(sk);
1423         struct xfrm_state *x;
1424
1425         if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1426                 return -EOPNOTSUPP;
1427
1428         if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1429                 return 0;
1430
1431         x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1432         if (x == NULL)
1433                 return 0;
1434
1435         spin_lock_bh(&x->lock);
1436         if (x->km.state == XFRM_STATE_ACQ)
1437                 x->km.state = XFRM_STATE_ERROR;
1438
1439         spin_unlock_bh(&x->lock);
1440         xfrm_state_put(x);
1441         return 0;
1442 }
1443
1444 static inline int event2poltype(int event)
1445 {
1446         switch (event) {
1447         case XFRM_MSG_DELPOLICY:
1448                 return SADB_X_SPDDELETE;
1449         case XFRM_MSG_NEWPOLICY:
1450                 return SADB_X_SPDADD;
1451         case XFRM_MSG_UPDPOLICY:
1452                 return SADB_X_SPDUPDATE;
1453         case XFRM_MSG_POLEXPIRE:
1454         //      return SADB_X_SPDEXPIRE;
1455         default:
1456                 pr_err("pfkey: Unknown policy event %d\n", event);
1457                 break;
1458         }
1459
1460         return 0;
1461 }
1462
1463 static inline int event2keytype(int event)
1464 {
1465         switch (event) {
1466         case XFRM_MSG_DELSA:
1467                 return SADB_DELETE;
1468         case XFRM_MSG_NEWSA:
1469                 return SADB_ADD;
1470         case XFRM_MSG_UPDSA:
1471                 return SADB_UPDATE;
1472         case XFRM_MSG_EXPIRE:
1473                 return SADB_EXPIRE;
1474         default:
1475                 pr_err("pfkey: Unknown SA event %d\n", event);
1476                 break;
1477         }
1478
1479         return 0;
1480 }
1481
1482 /* ADD/UPD/DEL */
1483 static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
1484 {
1485         struct sk_buff *skb;
1486         struct sadb_msg *hdr;
1487
1488         skb = pfkey_xfrm_state2msg(x);
1489
1490         if (IS_ERR(skb))
1491                 return PTR_ERR(skb);
1492
1493         hdr = (struct sadb_msg *) skb->data;
1494         hdr->sadb_msg_version = PF_KEY_V2;
1495         hdr->sadb_msg_type = event2keytype(c->event);
1496         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1497         hdr->sadb_msg_errno = 0;
1498         hdr->sadb_msg_reserved = 0;
1499         hdr->sadb_msg_seq = c->seq;
1500         hdr->sadb_msg_pid = c->portid;
1501
1502         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
1503
1504         return 0;
1505 }
1506
1507 static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1508 {
1509         struct net *net = sock_net(sk);
1510         struct xfrm_state *x;
1511         int err;
1512         struct km_event c;
1513
1514         x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1515         if (IS_ERR(x))
1516                 return PTR_ERR(x);
1517
1518         xfrm_state_hold(x);
1519         if (hdr->sadb_msg_type == SADB_ADD)
1520                 err = xfrm_state_add(x);
1521         else
1522                 err = xfrm_state_update(x);
1523
1524         xfrm_audit_state_add(x, err ? 0 : 1, true);
1525
1526         if (err < 0) {
1527                 x->km.state = XFRM_STATE_DEAD;
1528                 __xfrm_state_put(x);
1529                 goto out;
1530         }
1531
1532         if (hdr->sadb_msg_type == SADB_ADD)
1533                 c.event = XFRM_MSG_NEWSA;
1534         else
1535                 c.event = XFRM_MSG_UPDSA;
1536         c.seq = hdr->sadb_msg_seq;
1537         c.portid = hdr->sadb_msg_pid;
1538         km_state_notify(x, &c);
1539 out:
1540         xfrm_state_put(x);
1541         return err;
1542 }
1543
1544 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1545 {
1546         struct net *net = sock_net(sk);
1547         struct xfrm_state *x;
1548         struct km_event c;
1549         int err;
1550
1551         if (!ext_hdrs[SADB_EXT_SA-1] ||
1552             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1553                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1554                 return -EINVAL;
1555
1556         x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1557         if (x == NULL)
1558                 return -ESRCH;
1559
1560         if ((err = security_xfrm_state_delete(x)))
1561                 goto out;
1562
1563         if (xfrm_state_kern(x)) {
1564                 err = -EPERM;
1565                 goto out;
1566         }
1567
1568         err = xfrm_state_delete(x);
1569
1570         if (err < 0)
1571                 goto out;
1572
1573         c.seq = hdr->sadb_msg_seq;
1574         c.portid = hdr->sadb_msg_pid;
1575         c.event = XFRM_MSG_DELSA;
1576         km_state_notify(x, &c);
1577 out:
1578         xfrm_audit_state_delete(x, err ? 0 : 1, true);
1579         xfrm_state_put(x);
1580
1581         return err;
1582 }
1583
1584 static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1585 {
1586         struct net *net = sock_net(sk);
1587         __u8 proto;
1588         struct sk_buff *out_skb;
1589         struct sadb_msg *out_hdr;
1590         struct xfrm_state *x;
1591
1592         if (!ext_hdrs[SADB_EXT_SA-1] ||
1593             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1594                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1595                 return -EINVAL;
1596
1597         x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1598         if (x == NULL)
1599                 return -ESRCH;
1600
1601         out_skb = pfkey_xfrm_state2msg(x);
1602         proto = x->id.proto;
1603         xfrm_state_put(x);
1604         if (IS_ERR(out_skb))
1605                 return  PTR_ERR(out_skb);
1606
1607         out_hdr = (struct sadb_msg *) out_skb->data;
1608         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1609         out_hdr->sadb_msg_type = SADB_GET;
1610         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1611         out_hdr->sadb_msg_errno = 0;
1612         out_hdr->sadb_msg_reserved = 0;
1613         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1614         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1615         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1616
1617         return 0;
1618 }
1619
1620 static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
1621                                               gfp_t allocation)
1622 {
1623         struct sk_buff *skb;
1624         struct sadb_msg *hdr;
1625         int len, auth_len, enc_len, i;
1626
1627         auth_len = xfrm_count_pfkey_auth_supported();
1628         if (auth_len) {
1629                 auth_len *= sizeof(struct sadb_alg);
1630                 auth_len += sizeof(struct sadb_supported);
1631         }
1632
1633         enc_len = xfrm_count_pfkey_enc_supported();
1634         if (enc_len) {
1635                 enc_len *= sizeof(struct sadb_alg);
1636                 enc_len += sizeof(struct sadb_supported);
1637         }
1638
1639         len = enc_len + auth_len + sizeof(struct sadb_msg);
1640
1641         skb = alloc_skb(len + 16, allocation);
1642         if (!skb)
1643                 goto out_put_algs;
1644
1645         hdr = skb_put(skb, sizeof(*hdr));
1646         pfkey_hdr_dup(hdr, orig);
1647         hdr->sadb_msg_errno = 0;
1648         hdr->sadb_msg_len = len / sizeof(uint64_t);
1649
1650         if (auth_len) {
1651                 struct sadb_supported *sp;
1652                 struct sadb_alg *ap;
1653
1654                 sp = skb_put(skb, auth_len);
1655                 ap = (struct sadb_alg *) (sp + 1);
1656
1657                 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1658                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1659
1660                 for (i = 0; ; i++) {
1661                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1662                         if (!aalg)
1663                                 break;
1664                         if (!aalg->pfkey_supported)
1665                                 continue;
1666                         if (aalg->available)
1667                                 *ap++ = aalg->desc;
1668                 }
1669         }
1670
1671         if (enc_len) {
1672                 struct sadb_supported *sp;
1673                 struct sadb_alg *ap;
1674
1675                 sp = skb_put(skb, enc_len);
1676                 ap = (struct sadb_alg *) (sp + 1);
1677
1678                 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1679                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1680
1681                 for (i = 0; ; i++) {
1682                         struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1683                         if (!ealg)
1684                                 break;
1685                         if (!ealg->pfkey_supported)
1686                                 continue;
1687                         if (ealg->available)
1688                                 *ap++ = ealg->desc;
1689                 }
1690         }
1691
1692 out_put_algs:
1693         return skb;
1694 }
1695
1696 static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1697 {
1698         struct pfkey_sock *pfk = pfkey_sk(sk);
1699         struct sk_buff *supp_skb;
1700
1701         if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1702                 return -EINVAL;
1703
1704         if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1705                 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1706                         return -EEXIST;
1707                 pfk->registered |= (1<<hdr->sadb_msg_satype);
1708         }
1709
1710         mutex_lock(&pfkey_mutex);
1711         xfrm_probe_algs();
1712
1713         supp_skb = compose_sadb_supported(hdr, GFP_KERNEL | __GFP_ZERO);
1714         mutex_unlock(&pfkey_mutex);
1715
1716         if (!supp_skb) {
1717                 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1718                         pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1719
1720                 return -ENOBUFS;
1721         }
1722
1723         pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk,
1724                         sock_net(sk));
1725         return 0;
1726 }
1727
1728 static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
1729 {
1730         struct sk_buff *skb;
1731         struct sadb_msg *hdr;
1732
1733         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1734         if (!skb)
1735                 return -ENOBUFS;
1736
1737         hdr = skb_put_data(skb, ihdr, sizeof(struct sadb_msg));
1738         hdr->sadb_msg_errno = (uint8_t) 0;
1739         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1740
1741         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk,
1742                                sock_net(sk));
1743 }
1744
1745 static int key_notify_sa_flush(const struct km_event *c)
1746 {
1747         struct sk_buff *skb;
1748         struct sadb_msg *hdr;
1749
1750         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1751         if (!skb)
1752                 return -ENOBUFS;
1753         hdr = skb_put(skb, sizeof(struct sadb_msg));
1754         hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1755         hdr->sadb_msg_type = SADB_FLUSH;
1756         hdr->sadb_msg_seq = c->seq;
1757         hdr->sadb_msg_pid = c->portid;
1758         hdr->sadb_msg_version = PF_KEY_V2;
1759         hdr->sadb_msg_errno = (uint8_t) 0;
1760         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1761         hdr->sadb_msg_reserved = 0;
1762
1763         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
1764
1765         return 0;
1766 }
1767
1768 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1769 {
1770         struct net *net = sock_net(sk);
1771         unsigned int proto;
1772         struct km_event c;
1773         int err, err2;
1774
1775         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1776         if (proto == 0)
1777                 return -EINVAL;
1778
1779         err = xfrm_state_flush(net, proto, true);
1780         err2 = unicast_flush_resp(sk, hdr);
1781         if (err || err2) {
1782                 if (err == -ESRCH) /* empty table - go quietly */
1783                         err = 0;
1784                 return err ? err : err2;
1785         }
1786
1787         c.data.proto = proto;
1788         c.seq = hdr->sadb_msg_seq;
1789         c.portid = hdr->sadb_msg_pid;
1790         c.event = XFRM_MSG_FLUSHSA;
1791         c.net = net;
1792         km_state_notify(NULL, &c);
1793
1794         return 0;
1795 }
1796
1797 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1798 {
1799         struct pfkey_sock *pfk = ptr;
1800         struct sk_buff *out_skb;
1801         struct sadb_msg *out_hdr;
1802
1803         if (!pfkey_can_dump(&pfk->sk))
1804                 return -ENOBUFS;
1805
1806         out_skb = pfkey_xfrm_state2msg(x);
1807         if (IS_ERR(out_skb))
1808                 return PTR_ERR(out_skb);
1809
1810         out_hdr = (struct sadb_msg *) out_skb->data;
1811         out_hdr->sadb_msg_version = pfk->dump.msg_version;
1812         out_hdr->sadb_msg_type = SADB_DUMP;
1813         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1814         out_hdr->sadb_msg_errno = 0;
1815         out_hdr->sadb_msg_reserved = 0;
1816         out_hdr->sadb_msg_seq = count + 1;
1817         out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
1818
1819         if (pfk->dump.skb)
1820                 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
1821                                 &pfk->sk, sock_net(&pfk->sk));
1822         pfk->dump.skb = out_skb;
1823
1824         return 0;
1825 }
1826
1827 static int pfkey_dump_sa(struct pfkey_sock *pfk)
1828 {
1829         struct net *net = sock_net(&pfk->sk);
1830         return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1831 }
1832
1833 static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1834 {
1835         struct net *net = sock_net(&pfk->sk);
1836
1837         xfrm_state_walk_done(&pfk->dump.u.state, net);
1838 }
1839
1840 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1841 {
1842         u8 proto;
1843         struct xfrm_address_filter *filter = NULL;
1844         struct pfkey_sock *pfk = pfkey_sk(sk);
1845
1846         mutex_lock(&pfk->dump_lock);
1847         if (pfk->dump.dump != NULL) {
1848                 mutex_unlock(&pfk->dump_lock);
1849                 return -EBUSY;
1850         }
1851
1852         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1853         if (proto == 0) {
1854                 mutex_unlock(&pfk->dump_lock);
1855                 return -EINVAL;
1856         }
1857
1858         if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
1859                 struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
1860
1861                 if ((xfilter->sadb_x_filter_splen >
1862                         (sizeof(xfrm_address_t) << 3)) ||
1863                     (xfilter->sadb_x_filter_dplen >
1864                         (sizeof(xfrm_address_t) << 3))) {
1865                         mutex_unlock(&pfk->dump_lock);
1866                         return -EINVAL;
1867                 }
1868                 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
1869                 if (filter == NULL) {
1870                         mutex_unlock(&pfk->dump_lock);
1871                         return -ENOMEM;
1872                 }
1873
1874                 memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr,
1875                        sizeof(xfrm_address_t));
1876                 memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr,
1877                        sizeof(xfrm_address_t));
1878                 filter->family = xfilter->sadb_x_filter_family;
1879                 filter->splen = xfilter->sadb_x_filter_splen;
1880                 filter->dplen = xfilter->sadb_x_filter_dplen;
1881         }
1882
1883         pfk->dump.msg_version = hdr->sadb_msg_version;
1884         pfk->dump.msg_portid = hdr->sadb_msg_pid;
1885         pfk->dump.dump = pfkey_dump_sa;
1886         pfk->dump.done = pfkey_dump_sa_done;
1887         xfrm_state_walk_init(&pfk->dump.u.state, proto, filter);
1888         mutex_unlock(&pfk->dump_lock);
1889
1890         return pfkey_do_dump(pfk);
1891 }
1892
1893 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1894 {
1895         struct pfkey_sock *pfk = pfkey_sk(sk);
1896         int satype = hdr->sadb_msg_satype;
1897         bool reset_errno = false;
1898
1899         if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1900                 reset_errno = true;
1901                 if (satype != 0 && satype != 1)
1902                         return -EINVAL;
1903                 pfk->promisc = satype;
1904         }
1905         if (reset_errno && skb_cloned(skb))
1906                 skb = skb_copy(skb, GFP_KERNEL);
1907         else
1908                 skb = skb_clone(skb, GFP_KERNEL);
1909
1910         if (reset_errno && skb) {
1911                 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1912                 new_hdr->sadb_msg_errno = 0;
1913         }
1914
1915         pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
1916         return 0;
1917 }
1918
1919 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1920 {
1921         int i;
1922         u32 reqid = *(u32*)ptr;
1923
1924         for (i=0; i<xp->xfrm_nr; i++) {
1925                 if (xp->xfrm_vec[i].reqid == reqid)
1926                         return -EEXIST;
1927         }
1928         return 0;
1929 }
1930
1931 static u32 gen_reqid(struct net *net)
1932 {
1933         struct xfrm_policy_walk walk;
1934         u32 start;
1935         int rc;
1936         static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1937
1938         start = reqid;
1939         do {
1940                 ++reqid;
1941                 if (reqid == 0)
1942                         reqid = IPSEC_MANUAL_REQID_MAX+1;
1943                 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1944                 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1945                 xfrm_policy_walk_done(&walk, net);
1946                 if (rc != -EEXIST)
1947                         return reqid;
1948         } while (reqid != start);
1949         return 0;
1950 }
1951
1952 static int
1953 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_policy *pol,
1954                    struct sadb_x_ipsecrequest *rq)
1955 {
1956         struct net *net = xp_net(xp);
1957         struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1958         int mode;
1959
1960         if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1961                 return -ELOOP;
1962
1963         if (rq->sadb_x_ipsecrequest_mode == 0)
1964                 return -EINVAL;
1965         if (!xfrm_id_proto_valid(rq->sadb_x_ipsecrequest_proto))
1966                 return -EINVAL;
1967
1968         t->id.proto = rq->sadb_x_ipsecrequest_proto;
1969         if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1970                 return -EINVAL;
1971         t->mode = mode;
1972         if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) {
1973                 if ((mode == XFRM_MODE_TUNNEL || mode == XFRM_MODE_BEET) &&
1974                     pol->sadb_x_policy_dir == IPSEC_DIR_OUTBOUND)
1975                         return -EINVAL;
1976                 t->optional = 1;
1977         } else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1978                 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1979                 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1980                         t->reqid = 0;
1981                 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1982                         return -ENOBUFS;
1983         }
1984
1985         /* addresses present only in tunnel mode */
1986         if (t->mode == XFRM_MODE_TUNNEL) {
1987                 int err;
1988
1989                 err = parse_sockaddr_pair(
1990                         (struct sockaddr *)(rq + 1),
1991                         rq->sadb_x_ipsecrequest_len - sizeof(*rq),
1992                         &t->saddr, &t->id.daddr, &t->encap_family);
1993                 if (err)
1994                         return err;
1995         } else
1996                 t->encap_family = xp->family;
1997
1998         /* No way to set this via kame pfkey */
1999         t->allalgs = 1;
2000         xp->xfrm_nr++;
2001         return 0;
2002 }
2003
2004 static int
2005 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
2006 {
2007         int err;
2008         int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
2009         struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
2010
2011         if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
2012                 return -EINVAL;
2013
2014         while (len >= sizeof(*rq)) {
2015                 if (len < rq->sadb_x_ipsecrequest_len ||
2016                     rq->sadb_x_ipsecrequest_len < sizeof(*rq))
2017                         return -EINVAL;
2018
2019                 if ((err = parse_ipsecrequest(xp, pol, rq)) < 0)
2020                         return err;
2021                 len -= rq->sadb_x_ipsecrequest_len;
2022                 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
2023         }
2024         return 0;
2025 }
2026
2027 static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
2028 {
2029   struct xfrm_sec_ctx *xfrm_ctx = xp->security;
2030
2031         if (xfrm_ctx) {
2032                 int len = sizeof(struct sadb_x_sec_ctx);
2033                 len += xfrm_ctx->ctx_len;
2034                 return PFKEY_ALIGN8(len);
2035         }
2036         return 0;
2037 }
2038
2039 static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
2040 {
2041         const struct xfrm_tmpl *t;
2042         int sockaddr_size = pfkey_sockaddr_size(xp->family);
2043         int socklen = 0;
2044         int i;
2045
2046         for (i=0; i<xp->xfrm_nr; i++) {
2047                 t = xp->xfrm_vec + i;
2048                 socklen += pfkey_sockaddr_len(t->encap_family);
2049         }
2050
2051         return sizeof(struct sadb_msg) +
2052                 (sizeof(struct sadb_lifetime) * 3) +
2053                 (sizeof(struct sadb_address) * 2) +
2054                 (sockaddr_size * 2) +
2055                 sizeof(struct sadb_x_policy) +
2056                 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
2057                 (socklen * 2) +
2058                 pfkey_xfrm_policy2sec_ctx_size(xp);
2059 }
2060
2061 static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
2062 {
2063         struct sk_buff *skb;
2064         int size;
2065
2066         size = pfkey_xfrm_policy2msg_size(xp);
2067
2068         skb =  alloc_skb(size + 16, GFP_ATOMIC);
2069         if (skb == NULL)
2070                 return ERR_PTR(-ENOBUFS);
2071
2072         return skb;
2073 }
2074
2075 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
2076 {
2077         struct sadb_msg *hdr;
2078         struct sadb_address *addr;
2079         struct sadb_lifetime *lifetime;
2080         struct sadb_x_policy *pol;
2081         struct sadb_x_sec_ctx *sec_ctx;
2082         struct xfrm_sec_ctx *xfrm_ctx;
2083         int i;
2084         int size;
2085         int sockaddr_size = pfkey_sockaddr_size(xp->family);
2086         int socklen = pfkey_sockaddr_len(xp->family);
2087
2088         size = pfkey_xfrm_policy2msg_size(xp);
2089
2090         /* call should fill header later */
2091         hdr = skb_put(skb, sizeof(struct sadb_msg));
2092         memset(hdr, 0, size);   /* XXX do we need this ? */
2093
2094         /* src address */
2095         addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
2096         addr->sadb_address_len =
2097                 (sizeof(struct sadb_address)+sockaddr_size)/
2098                         sizeof(uint64_t);
2099         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2100         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2101         addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2102         addr->sadb_address_reserved = 0;
2103         if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2104                                  xp->selector.sport,
2105                                  (struct sockaddr *) (addr + 1),
2106                                  xp->family))
2107                 BUG();
2108
2109         /* dst address */
2110         addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
2111         addr->sadb_address_len =
2112                 (sizeof(struct sadb_address)+sockaddr_size)/
2113                         sizeof(uint64_t);
2114         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2115         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2116         addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2117         addr->sadb_address_reserved = 0;
2118
2119         pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2120                             (struct sockaddr *) (addr + 1),
2121                             xp->family);
2122
2123         /* hard time */
2124         lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2125         lifetime->sadb_lifetime_len =
2126                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2127         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2128         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.hard_packet_limit);
2129         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2130         lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2131         lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2132         /* soft time */
2133         lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2134         lifetime->sadb_lifetime_len =
2135                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2136         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2137         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.soft_packet_limit);
2138         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2139         lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2140         lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2141         /* current time */
2142         lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
2143         lifetime->sadb_lifetime_len =
2144                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2145         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2146         lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2147         lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2148         lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2149         lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2150
2151         pol = skb_put(skb, sizeof(struct sadb_x_policy));
2152         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2153         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2154         pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2155         if (xp->action == XFRM_POLICY_ALLOW) {
2156                 if (xp->xfrm_nr)
2157                         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2158                 else
2159                         pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2160         }
2161         pol->sadb_x_policy_dir = dir+1;
2162         pol->sadb_x_policy_reserved = 0;
2163         pol->sadb_x_policy_id = xp->index;
2164         pol->sadb_x_policy_priority = xp->priority;
2165
2166         for (i=0; i<xp->xfrm_nr; i++) {
2167                 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
2168                 struct sadb_x_ipsecrequest *rq;
2169                 int req_size;
2170                 int mode;
2171
2172                 req_size = sizeof(struct sadb_x_ipsecrequest);
2173                 if (t->mode == XFRM_MODE_TUNNEL) {
2174                         socklen = pfkey_sockaddr_len(t->encap_family);
2175                         req_size += socklen * 2;
2176                 } else {
2177                         size -= 2*socklen;
2178                 }
2179                 rq = skb_put(skb, req_size);
2180                 pol->sadb_x_policy_len += req_size/8;
2181                 memset(rq, 0, sizeof(*rq));
2182                 rq->sadb_x_ipsecrequest_len = req_size;
2183                 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2184                 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2185                         return -EINVAL;
2186                 rq->sadb_x_ipsecrequest_mode = mode;
2187                 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2188                 if (t->reqid)
2189                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2190                 if (t->optional)
2191                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2192                 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2193
2194                 if (t->mode == XFRM_MODE_TUNNEL) {
2195                         u8 *sa = (void *)(rq + 1);
2196                         pfkey_sockaddr_fill(&t->saddr, 0,
2197                                             (struct sockaddr *)sa,
2198                                             t->encap_family);
2199                         pfkey_sockaddr_fill(&t->id.daddr, 0,
2200                                             (struct sockaddr *) (sa + socklen),
2201                                             t->encap_family);
2202                 }
2203         }
2204
2205         /* security context */
2206         if ((xfrm_ctx = xp->security)) {
2207                 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2208
2209                 sec_ctx = skb_put(skb, ctx_size);
2210                 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2211                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2212                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2213                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2214                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2215                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2216                        xfrm_ctx->ctx_len);
2217         }
2218
2219         hdr->sadb_msg_len = size / sizeof(uint64_t);
2220         hdr->sadb_msg_reserved = refcount_read(&xp->refcnt);
2221
2222         return 0;
2223 }
2224
2225 static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2226 {
2227         struct sk_buff *out_skb;
2228         struct sadb_msg *out_hdr;
2229         int err;
2230
2231         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2232         if (IS_ERR(out_skb))
2233                 return PTR_ERR(out_skb);
2234
2235         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2236         if (err < 0)
2237                 return err;
2238
2239         out_hdr = (struct sadb_msg *) out_skb->data;
2240         out_hdr->sadb_msg_version = PF_KEY_V2;
2241
2242         if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2243                 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2244         else
2245                 out_hdr->sadb_msg_type = event2poltype(c->event);
2246         out_hdr->sadb_msg_errno = 0;
2247         out_hdr->sadb_msg_seq = c->seq;
2248         out_hdr->sadb_msg_pid = c->portid;
2249         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
2250         return 0;
2251
2252 }
2253
2254 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2255 {
2256         struct net *net = sock_net(sk);
2257         int err = 0;
2258         struct sadb_lifetime *lifetime;
2259         struct sadb_address *sa;
2260         struct sadb_x_policy *pol;
2261         struct xfrm_policy *xp;
2262         struct km_event c;
2263         struct sadb_x_sec_ctx *sec_ctx;
2264
2265         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2266                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2267             !ext_hdrs[SADB_X_EXT_POLICY-1])
2268                 return -EINVAL;
2269
2270         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2271         if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2272                 return -EINVAL;
2273         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2274                 return -EINVAL;
2275
2276         xp = xfrm_policy_alloc(net, GFP_KERNEL);
2277         if (xp == NULL)
2278                 return -ENOBUFS;
2279
2280         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2281                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2282         xp->priority = pol->sadb_x_policy_priority;
2283
2284         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2285         xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2286         xp->selector.family = xp->family;
2287         xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2288         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2289         xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2290         if (xp->selector.sport)
2291                 xp->selector.sport_mask = htons(0xffff);
2292
2293         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2294         pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2295         xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2296
2297         /* Amusing, we set this twice.  KAME apps appear to set same value
2298          * in both addresses.
2299          */
2300         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2301
2302         xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2303         if (xp->selector.dport)
2304                 xp->selector.dport_mask = htons(0xffff);
2305
2306         sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2307         if (sec_ctx != NULL) {
2308                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2309
2310                 if (!uctx) {
2311                         err = -ENOBUFS;
2312                         goto out;
2313                 }
2314
2315                 err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL);
2316                 kfree(uctx);
2317
2318                 if (err)
2319                         goto out;
2320         }
2321
2322         xp->lft.soft_byte_limit = XFRM_INF;
2323         xp->lft.hard_byte_limit = XFRM_INF;
2324         xp->lft.soft_packet_limit = XFRM_INF;
2325         xp->lft.hard_packet_limit = XFRM_INF;
2326         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2327                 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2328                 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2329                 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2330                 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2331         }
2332         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2333                 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2334                 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2335                 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2336                 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2337         }
2338         xp->xfrm_nr = 0;
2339         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2340             (err = parse_ipsecrequests(xp, pol)) < 0)
2341                 goto out;
2342
2343         err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2344                                  hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2345
2346         xfrm_audit_policy_add(xp, err ? 0 : 1, true);
2347
2348         if (err)
2349                 goto out;
2350
2351         if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2352                 c.event = XFRM_MSG_UPDPOLICY;
2353         else
2354                 c.event = XFRM_MSG_NEWPOLICY;
2355
2356         c.seq = hdr->sadb_msg_seq;
2357         c.portid = hdr->sadb_msg_pid;
2358
2359         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2360         xfrm_pol_put(xp);
2361         return 0;
2362
2363 out:
2364         xp->walk.dead = 1;
2365         xfrm_policy_destroy(xp);
2366         return err;
2367 }
2368
2369 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2370 {
2371         struct net *net = sock_net(sk);
2372         int err;
2373         struct sadb_address *sa;
2374         struct sadb_x_policy *pol;
2375         struct xfrm_policy *xp;
2376         struct xfrm_selector sel;
2377         struct km_event c;
2378         struct sadb_x_sec_ctx *sec_ctx;
2379         struct xfrm_sec_ctx *pol_ctx = NULL;
2380
2381         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2382                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2383             !ext_hdrs[SADB_X_EXT_POLICY-1])
2384                 return -EINVAL;
2385
2386         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2387         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2388                 return -EINVAL;
2389
2390         memset(&sel, 0, sizeof(sel));
2391
2392         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2393         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2394         sel.prefixlen_s = sa->sadb_address_prefixlen;
2395         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2396         sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2397         if (sel.sport)
2398                 sel.sport_mask = htons(0xffff);
2399
2400         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2401         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2402         sel.prefixlen_d = sa->sadb_address_prefixlen;
2403         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2404         sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2405         if (sel.dport)
2406                 sel.dport_mask = htons(0xffff);
2407
2408         sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2409         if (sec_ctx != NULL) {
2410                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2411
2412                 if (!uctx)
2413                         return -ENOMEM;
2414
2415                 err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL);
2416                 kfree(uctx);
2417                 if (err)
2418                         return err;
2419         }
2420
2421         xp = xfrm_policy_bysel_ctx(net, &dummy_mark, XFRM_POLICY_TYPE_MAIN,
2422                                    pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2423                                    1, &err);
2424         security_xfrm_policy_free(pol_ctx);
2425         if (xp == NULL)
2426                 return -ENOENT;
2427
2428         xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2429
2430         if (err)
2431                 goto out;
2432
2433         c.seq = hdr->sadb_msg_seq;
2434         c.portid = hdr->sadb_msg_pid;
2435         c.data.byid = 0;
2436         c.event = XFRM_MSG_DELPOLICY;
2437         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2438
2439 out:
2440         xfrm_pol_put(xp);
2441         return err;
2442 }
2443
2444 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
2445 {
2446         int err;
2447         struct sk_buff *out_skb;
2448         struct sadb_msg *out_hdr;
2449         err = 0;
2450
2451         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2452         if (IS_ERR(out_skb)) {
2453                 err =  PTR_ERR(out_skb);
2454                 goto out;
2455         }
2456         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2457         if (err < 0) {
2458                 kfree_skb(out_skb);
2459                 goto out;
2460         }
2461
2462         out_hdr = (struct sadb_msg *) out_skb->data;
2463         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2464         out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2465         out_hdr->sadb_msg_satype = 0;
2466         out_hdr->sadb_msg_errno = 0;
2467         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2468         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2469         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
2470         err = 0;
2471
2472 out:
2473         return err;
2474 }
2475
2476 static int pfkey_sockaddr_pair_size(sa_family_t family)
2477 {
2478         return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2479 }
2480
2481 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2482                                xfrm_address_t *saddr, xfrm_address_t *daddr,
2483                                u16 *family)
2484 {
2485         int af, socklen;
2486
2487         if (ext_len < 2 || ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2488                 return -EINVAL;
2489
2490         af = pfkey_sockaddr_extract(sa, saddr);
2491         if (!af)
2492                 return -EINVAL;
2493
2494         socklen = pfkey_sockaddr_len(af);
2495         if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2496                                    daddr) != af)
2497                 return -EINVAL;
2498
2499         *family = af;
2500         return 0;
2501 }
2502
2503 #ifdef CONFIG_NET_KEY_MIGRATE
2504 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2505                                     struct xfrm_migrate *m)
2506 {
2507         int err;
2508         struct sadb_x_ipsecrequest *rq2;
2509         int mode;
2510
2511         if (len < sizeof(*rq1) ||
2512             len < rq1->sadb_x_ipsecrequest_len ||
2513             rq1->sadb_x_ipsecrequest_len < sizeof(*rq1))
2514                 return -EINVAL;
2515
2516         /* old endoints */
2517         err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2518                                   rq1->sadb_x_ipsecrequest_len - sizeof(*rq1),
2519                                   &m->old_saddr, &m->old_daddr,
2520                                   &m->old_family);
2521         if (err)
2522                 return err;
2523
2524         rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2525         len -= rq1->sadb_x_ipsecrequest_len;
2526
2527         if (len <= sizeof(*rq2) ||
2528             len < rq2->sadb_x_ipsecrequest_len ||
2529             rq2->sadb_x_ipsecrequest_len < sizeof(*rq2))
2530                 return -EINVAL;
2531
2532         /* new endpoints */
2533         err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2534                                   rq2->sadb_x_ipsecrequest_len - sizeof(*rq2),
2535                                   &m->new_saddr, &m->new_daddr,
2536                                   &m->new_family);
2537         if (err)
2538                 return err;
2539
2540         if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2541             rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2542             rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2543                 return -EINVAL;
2544
2545         m->proto = rq1->sadb_x_ipsecrequest_proto;
2546         if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2547                 return -EINVAL;
2548         m->mode = mode;
2549         m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2550
2551         return ((int)(rq1->sadb_x_ipsecrequest_len +
2552                       rq2->sadb_x_ipsecrequest_len));
2553 }
2554
2555 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2556                          const struct sadb_msg *hdr, void * const *ext_hdrs)
2557 {
2558         int i, len, ret, err = -EINVAL;
2559         u8 dir;
2560         struct sadb_address *sa;
2561         struct sadb_x_kmaddress *kma;
2562         struct sadb_x_policy *pol;
2563         struct sadb_x_ipsecrequest *rq;
2564         struct xfrm_selector sel;
2565         struct xfrm_migrate m[XFRM_MAX_DEPTH];
2566         struct xfrm_kmaddress k;
2567         struct net *net = sock_net(sk);
2568
2569         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2570                                      ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2571             !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2572                 err = -EINVAL;
2573                 goto out;
2574         }
2575
2576         kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2577         pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2578
2579         if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2580                 err = -EINVAL;
2581                 goto out;
2582         }
2583
2584         if (kma) {
2585                 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2586                 k.reserved = kma->sadb_x_kmaddress_reserved;
2587                 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2588                                           8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2589                                           &k.local, &k.remote, &k.family);
2590                 if (ret < 0) {
2591                         err = ret;
2592                         goto out;
2593                 }
2594         }
2595
2596         dir = pol->sadb_x_policy_dir - 1;
2597         memset(&sel, 0, sizeof(sel));
2598
2599         /* set source address info of selector */
2600         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2601         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2602         sel.prefixlen_s = sa->sadb_address_prefixlen;
2603         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2604         sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2605         if (sel.sport)
2606                 sel.sport_mask = htons(0xffff);
2607
2608         /* set destination address info of selector */
2609         sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
2610         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2611         sel.prefixlen_d = sa->sadb_address_prefixlen;
2612         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2613         sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2614         if (sel.dport)
2615                 sel.dport_mask = htons(0xffff);
2616
2617         rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2618
2619         /* extract ipsecrequests */
2620         i = 0;
2621         len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2622
2623         while (len > 0 && i < XFRM_MAX_DEPTH) {
2624                 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2625                 if (ret < 0) {
2626                         err = ret;
2627                         goto out;
2628                 } else {
2629                         rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2630                         len -= ret;
2631                         i++;
2632                 }
2633         }
2634
2635         if (!i || len > 0) {
2636                 err = -EINVAL;
2637                 goto out;
2638         }
2639
2640         return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2641                             kma ? &k : NULL, net, NULL);
2642
2643  out:
2644         return err;
2645 }
2646 #else
2647 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2648                          const struct sadb_msg *hdr, void * const *ext_hdrs)
2649 {
2650         return -ENOPROTOOPT;
2651 }
2652 #endif
2653
2654
2655 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2656 {
2657         struct net *net = sock_net(sk);
2658         unsigned int dir;
2659         int err = 0, delete;
2660         struct sadb_x_policy *pol;
2661         struct xfrm_policy *xp;
2662         struct km_event c;
2663
2664         if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2665                 return -EINVAL;
2666
2667         dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2668         if (dir >= XFRM_POLICY_MAX)
2669                 return -EINVAL;
2670
2671         delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2672         xp = xfrm_policy_byid(net, &dummy_mark, XFRM_POLICY_TYPE_MAIN,
2673                               dir, pol->sadb_x_policy_id, delete, &err);
2674         if (xp == NULL)
2675                 return -ENOENT;
2676
2677         if (delete) {
2678                 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2679
2680                 if (err)
2681                         goto out;
2682                 c.seq = hdr->sadb_msg_seq;
2683                 c.portid = hdr->sadb_msg_pid;
2684                 c.data.byid = 1;
2685                 c.event = XFRM_MSG_DELPOLICY;
2686                 km_policy_notify(xp, dir, &c);
2687         } else {
2688                 err = key_pol_get_resp(sk, xp, hdr, dir);
2689         }
2690
2691 out:
2692         xfrm_pol_put(xp);
2693         return err;
2694 }
2695
2696 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2697 {
2698         struct pfkey_sock *pfk = ptr;
2699         struct sk_buff *out_skb;
2700         struct sadb_msg *out_hdr;
2701         int err;
2702
2703         if (!pfkey_can_dump(&pfk->sk))
2704                 return -ENOBUFS;
2705
2706         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2707         if (IS_ERR(out_skb))
2708                 return PTR_ERR(out_skb);
2709
2710         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2711         if (err < 0) {
2712                 kfree_skb(out_skb);
2713                 return err;
2714         }
2715
2716         out_hdr = (struct sadb_msg *) out_skb->data;
2717         out_hdr->sadb_msg_version = pfk->dump.msg_version;
2718         out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2719         out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2720         out_hdr->sadb_msg_errno = 0;
2721         out_hdr->sadb_msg_seq = count + 1;
2722         out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
2723
2724         if (pfk->dump.skb)
2725                 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
2726                                 &pfk->sk, sock_net(&pfk->sk));
2727         pfk->dump.skb = out_skb;
2728
2729         return 0;
2730 }
2731
2732 static int pfkey_dump_sp(struct pfkey_sock *pfk)
2733 {
2734         struct net *net = sock_net(&pfk->sk);
2735         return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2736 }
2737
2738 static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2739 {
2740         struct net *net = sock_net((struct sock *)pfk);
2741
2742         xfrm_policy_walk_done(&pfk->dump.u.policy, net);
2743 }
2744
2745 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2746 {
2747         struct pfkey_sock *pfk = pfkey_sk(sk);
2748
2749         mutex_lock(&pfk->dump_lock);
2750         if (pfk->dump.dump != NULL) {
2751                 mutex_unlock(&pfk->dump_lock);
2752                 return -EBUSY;
2753         }
2754
2755         pfk->dump.msg_version = hdr->sadb_msg_version;
2756         pfk->dump.msg_portid = hdr->sadb_msg_pid;
2757         pfk->dump.dump = pfkey_dump_sp;
2758         pfk->dump.done = pfkey_dump_sp_done;
2759         xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2760         mutex_unlock(&pfk->dump_lock);
2761
2762         return pfkey_do_dump(pfk);
2763 }
2764
2765 static int key_notify_policy_flush(const struct km_event *c)
2766 {
2767         struct sk_buff *skb_out;
2768         struct sadb_msg *hdr;
2769
2770         skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2771         if (!skb_out)
2772                 return -ENOBUFS;
2773         hdr = skb_put(skb_out, sizeof(struct sadb_msg));
2774         hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2775         hdr->sadb_msg_seq = c->seq;
2776         hdr->sadb_msg_pid = c->portid;
2777         hdr->sadb_msg_version = PF_KEY_V2;
2778         hdr->sadb_msg_errno = (uint8_t) 0;
2779         hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2780         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2781         hdr->sadb_msg_reserved = 0;
2782         pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
2783         return 0;
2784
2785 }
2786
2787 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2788 {
2789         struct net *net = sock_net(sk);
2790         struct km_event c;
2791         int err, err2;
2792
2793         err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, true);
2794         err2 = unicast_flush_resp(sk, hdr);
2795         if (err || err2) {
2796                 if (err == -ESRCH) /* empty table - old silent behavior */
2797                         return 0;
2798                 return err;
2799         }
2800
2801         c.data.type = XFRM_POLICY_TYPE_MAIN;
2802         c.event = XFRM_MSG_FLUSHPOLICY;
2803         c.portid = hdr->sadb_msg_pid;
2804         c.seq = hdr->sadb_msg_seq;
2805         c.net = net;
2806         km_policy_notify(NULL, 0, &c);
2807
2808         return 0;
2809 }
2810
2811 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2812                              const struct sadb_msg *hdr, void * const *ext_hdrs);
2813 static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2814         [SADB_RESERVED]         = pfkey_reserved,
2815         [SADB_GETSPI]           = pfkey_getspi,
2816         [SADB_UPDATE]           = pfkey_add,
2817         [SADB_ADD]              = pfkey_add,
2818         [SADB_DELETE]           = pfkey_delete,
2819         [SADB_GET]              = pfkey_get,
2820         [SADB_ACQUIRE]          = pfkey_acquire,
2821         [SADB_REGISTER]         = pfkey_register,
2822         [SADB_EXPIRE]           = NULL,
2823         [SADB_FLUSH]            = pfkey_flush,
2824         [SADB_DUMP]             = pfkey_dump,
2825         [SADB_X_PROMISC]        = pfkey_promisc,
2826         [SADB_X_PCHANGE]        = NULL,
2827         [SADB_X_SPDUPDATE]      = pfkey_spdadd,
2828         [SADB_X_SPDADD]         = pfkey_spdadd,
2829         [SADB_X_SPDDELETE]      = pfkey_spddelete,
2830         [SADB_X_SPDGET]         = pfkey_spdget,
2831         [SADB_X_SPDACQUIRE]     = NULL,
2832         [SADB_X_SPDDUMP]        = pfkey_spddump,
2833         [SADB_X_SPDFLUSH]       = pfkey_spdflush,
2834         [SADB_X_SPDSETIDX]      = pfkey_spdadd,
2835         [SADB_X_SPDDELETE2]     = pfkey_spdget,
2836         [SADB_X_MIGRATE]        = pfkey_migrate,
2837 };
2838
2839 static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
2840 {
2841         void *ext_hdrs[SADB_EXT_MAX];
2842         int err;
2843
2844         /* Non-zero return value of pfkey_broadcast() does not always signal
2845          * an error and even on an actual error we may still want to process
2846          * the message so rather ignore the return value.
2847          */
2848         pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2849                         BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
2850
2851         memset(ext_hdrs, 0, sizeof(ext_hdrs));
2852         err = parse_exthdrs(skb, hdr, ext_hdrs);
2853         if (!err) {
2854                 err = -EOPNOTSUPP;
2855                 if (pfkey_funcs[hdr->sadb_msg_type])
2856                         err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2857         }
2858         return err;
2859 }
2860
2861 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2862 {
2863         struct sadb_msg *hdr = NULL;
2864
2865         if (skb->len < sizeof(*hdr)) {
2866                 *errp = -EMSGSIZE;
2867         } else {
2868                 hdr = (struct sadb_msg *) skb->data;
2869                 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2870                     hdr->sadb_msg_reserved != 0 ||
2871                     (hdr->sadb_msg_type <= SADB_RESERVED ||
2872                      hdr->sadb_msg_type > SADB_MAX)) {
2873                         hdr = NULL;
2874                         *errp = -EINVAL;
2875                 } else if (hdr->sadb_msg_len != (skb->len /
2876                                                  sizeof(uint64_t)) ||
2877                            hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2878                                                 sizeof(uint64_t))) {
2879                         hdr = NULL;
2880                         *errp = -EMSGSIZE;
2881                 } else {
2882                         *errp = 0;
2883                 }
2884         }
2885         return hdr;
2886 }
2887
2888 static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2889                                 const struct xfrm_algo_desc *d)
2890 {
2891         unsigned int id = d->desc.sadb_alg_id;
2892
2893         if (id >= sizeof(t->aalgos) * 8)
2894                 return 0;
2895
2896         return (t->aalgos >> id) & 1;
2897 }
2898
2899 static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2900                                 const struct xfrm_algo_desc *d)
2901 {
2902         unsigned int id = d->desc.sadb_alg_id;
2903
2904         if (id >= sizeof(t->ealgos) * 8)
2905                 return 0;
2906
2907         return (t->ealgos >> id) & 1;
2908 }
2909
2910 static int count_ah_combs(const struct xfrm_tmpl *t)
2911 {
2912         int i, sz = 0;
2913
2914         for (i = 0; ; i++) {
2915                 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2916                 if (!aalg)
2917                         break;
2918                 if (!aalg->pfkey_supported)
2919                         continue;
2920                 if (aalg_tmpl_set(t, aalg))
2921                         sz += sizeof(struct sadb_comb);
2922         }
2923         return sz + sizeof(struct sadb_prop);
2924 }
2925
2926 static int count_esp_combs(const struct xfrm_tmpl *t)
2927 {
2928         int i, k, sz = 0;
2929
2930         for (i = 0; ; i++) {
2931                 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2932                 if (!ealg)
2933                         break;
2934
2935                 if (!ealg->pfkey_supported)
2936                         continue;
2937
2938                 if (!(ealg_tmpl_set(t, ealg)))
2939                         continue;
2940
2941                 for (k = 1; ; k++) {
2942                         const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2943                         if (!aalg)
2944                                 break;
2945
2946                         if (!aalg->pfkey_supported)
2947                                 continue;
2948
2949                         if (aalg_tmpl_set(t, aalg))
2950                                 sz += sizeof(struct sadb_comb);
2951                 }
2952         }
2953         return sz + sizeof(struct sadb_prop);
2954 }
2955
2956 static int dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2957 {
2958         struct sadb_prop *p;
2959         int sz = 0;
2960         int i;
2961
2962         p = skb_put(skb, sizeof(struct sadb_prop));
2963         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2964         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2965         p->sadb_prop_replay = 32;
2966         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2967
2968         for (i = 0; ; i++) {
2969                 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2970                 if (!aalg)
2971                         break;
2972
2973                 if (!aalg->pfkey_supported)
2974                         continue;
2975
2976                 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2977                         struct sadb_comb *c;
2978                         c = skb_put_zero(skb, sizeof(struct sadb_comb));
2979                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2980                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2981                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2982                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2983                         c->sadb_comb_hard_addtime = 24*60*60;
2984                         c->sadb_comb_soft_addtime = 20*60*60;
2985                         c->sadb_comb_hard_usetime = 8*60*60;
2986                         c->sadb_comb_soft_usetime = 7*60*60;
2987                         sz += sizeof(*c);
2988                 }
2989         }
2990
2991         return sz + sizeof(*p);
2992 }
2993
2994 static int dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2995 {
2996         struct sadb_prop *p;
2997         int sz = 0;
2998         int i, k;
2999
3000         p = skb_put(skb, sizeof(struct sadb_prop));
3001         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
3002         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
3003         p->sadb_prop_replay = 32;
3004         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
3005
3006         for (i=0; ; i++) {
3007                 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
3008                 if (!ealg)
3009                         break;
3010
3011                 if (!ealg->pfkey_supported)
3012                         continue;
3013
3014                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
3015                         continue;
3016
3017                 for (k = 1; ; k++) {
3018                         struct sadb_comb *c;
3019                         const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
3020                         if (!aalg)
3021                                 break;
3022                         if (!aalg->pfkey_supported)
3023                                 continue;
3024                         if (!(aalg_tmpl_set(t, aalg) && aalg->available))
3025                                 continue;
3026                         c = skb_put(skb, sizeof(struct sadb_comb));
3027                         memset(c, 0, sizeof(*c));
3028                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
3029                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
3030                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
3031                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
3032                         c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
3033                         c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
3034                         c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
3035                         c->sadb_comb_hard_addtime = 24*60*60;
3036                         c->sadb_comb_soft_addtime = 20*60*60;
3037                         c->sadb_comb_hard_usetime = 8*60*60;
3038                         c->sadb_comb_soft_usetime = 7*60*60;
3039                         sz += sizeof(*c);
3040                 }
3041         }
3042
3043         return sz + sizeof(*p);
3044 }
3045
3046 static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
3047 {
3048         return 0;
3049 }
3050
3051 static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
3052 {
3053         struct sk_buff *out_skb;
3054         struct sadb_msg *out_hdr;
3055         int hard;
3056         int hsc;
3057
3058         hard = c->data.hard;
3059         if (hard)
3060                 hsc = 2;
3061         else
3062                 hsc = 1;
3063
3064         out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
3065         if (IS_ERR(out_skb))
3066                 return PTR_ERR(out_skb);
3067
3068         out_hdr = (struct sadb_msg *) out_skb->data;
3069         out_hdr->sadb_msg_version = PF_KEY_V2;
3070         out_hdr->sadb_msg_type = SADB_EXPIRE;
3071         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3072         out_hdr->sadb_msg_errno = 0;
3073         out_hdr->sadb_msg_reserved = 0;
3074         out_hdr->sadb_msg_seq = 0;
3075         out_hdr->sadb_msg_pid = 0;
3076
3077         pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3078                         xs_net(x));
3079         return 0;
3080 }
3081
3082 static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
3083 {
3084         struct net *net = x ? xs_net(x) : c->net;
3085         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3086
3087         if (atomic_read(&net_pfkey->socks_nr) == 0)
3088                 return 0;
3089
3090         switch (c->event) {
3091         case XFRM_MSG_EXPIRE:
3092                 return key_notify_sa_expire(x, c);
3093         case XFRM_MSG_DELSA:
3094         case XFRM_MSG_NEWSA:
3095         case XFRM_MSG_UPDSA:
3096                 return key_notify_sa(x, c);
3097         case XFRM_MSG_FLUSHSA:
3098                 return key_notify_sa_flush(c);
3099         case XFRM_MSG_NEWAE: /* not yet supported */
3100                 break;
3101         default:
3102                 pr_err("pfkey: Unknown SA event %d\n", c->event);
3103                 break;
3104         }
3105
3106         return 0;
3107 }
3108
3109 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3110 {
3111         if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3112                 return 0;
3113
3114         switch (c->event) {
3115         case XFRM_MSG_POLEXPIRE:
3116                 return key_notify_policy_expire(xp, c);
3117         case XFRM_MSG_DELPOLICY:
3118         case XFRM_MSG_NEWPOLICY:
3119         case XFRM_MSG_UPDPOLICY:
3120                 return key_notify_policy(xp, dir, c);
3121         case XFRM_MSG_FLUSHPOLICY:
3122                 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3123                         break;
3124                 return key_notify_policy_flush(c);
3125         default:
3126                 pr_err("pfkey: Unknown policy event %d\n", c->event);
3127                 break;
3128         }
3129
3130         return 0;
3131 }
3132
3133 static u32 get_acqseq(void)
3134 {
3135         u32 res;
3136         static atomic_t acqseq;
3137
3138         do {
3139                 res = atomic_inc_return(&acqseq);
3140         } while (!res);
3141         return res;
3142 }
3143
3144 static bool pfkey_is_alive(const struct km_event *c)
3145 {
3146         struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id);
3147         struct sock *sk;
3148         bool is_alive = false;
3149
3150         rcu_read_lock();
3151         sk_for_each_rcu(sk, &net_pfkey->table) {
3152                 if (pfkey_sk(sk)->registered) {
3153                         is_alive = true;
3154                         break;
3155                 }
3156         }
3157         rcu_read_unlock();
3158
3159         return is_alive;
3160 }
3161
3162 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
3163 {
3164         struct sk_buff *skb;
3165         struct sadb_msg *hdr;
3166         struct sadb_address *addr;
3167         struct sadb_x_policy *pol;
3168         int sockaddr_size;
3169         int size;
3170         struct sadb_x_sec_ctx *sec_ctx;
3171         struct xfrm_sec_ctx *xfrm_ctx;
3172         int ctx_size = 0;
3173         int alg_size = 0;
3174
3175         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3176         if (!sockaddr_size)
3177                 return -EINVAL;
3178
3179         size = sizeof(struct sadb_msg) +
3180                 (sizeof(struct sadb_address) * 2) +
3181                 (sockaddr_size * 2) +
3182                 sizeof(struct sadb_x_policy);
3183
3184         if (x->id.proto == IPPROTO_AH)
3185                 alg_size = count_ah_combs(t);
3186         else if (x->id.proto == IPPROTO_ESP)
3187                 alg_size = count_esp_combs(t);
3188
3189         if ((xfrm_ctx = x->security)) {
3190                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3191                 size +=  sizeof(struct sadb_x_sec_ctx) + ctx_size;
3192         }
3193
3194         skb =  alloc_skb(size + alg_size + 16, GFP_ATOMIC);
3195         if (skb == NULL)
3196                 return -ENOMEM;
3197
3198         hdr = skb_put(skb, sizeof(struct sadb_msg));
3199         hdr->sadb_msg_version = PF_KEY_V2;
3200         hdr->sadb_msg_type = SADB_ACQUIRE;
3201         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3202         hdr->sadb_msg_len = size / sizeof(uint64_t);
3203         hdr->sadb_msg_errno = 0;
3204         hdr->sadb_msg_reserved = 0;
3205         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3206         hdr->sadb_msg_pid = 0;
3207
3208         /* src address */
3209         addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3210         addr->sadb_address_len =
3211                 (sizeof(struct sadb_address)+sockaddr_size)/
3212                         sizeof(uint64_t);
3213         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3214         addr->sadb_address_proto = 0;
3215         addr->sadb_address_reserved = 0;
3216         addr->sadb_address_prefixlen =
3217                 pfkey_sockaddr_fill(&x->props.saddr, 0,
3218                                     (struct sockaddr *) (addr + 1),
3219                                     x->props.family);
3220         if (!addr->sadb_address_prefixlen)
3221                 BUG();
3222
3223         /* dst address */
3224         addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3225         addr->sadb_address_len =
3226                 (sizeof(struct sadb_address)+sockaddr_size)/
3227                         sizeof(uint64_t);
3228         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3229         addr->sadb_address_proto = 0;
3230         addr->sadb_address_reserved = 0;
3231         addr->sadb_address_prefixlen =
3232                 pfkey_sockaddr_fill(&x->id.daddr, 0,
3233                                     (struct sockaddr *) (addr + 1),
3234                                     x->props.family);
3235         if (!addr->sadb_address_prefixlen)
3236                 BUG();
3237
3238         pol = skb_put(skb, sizeof(struct sadb_x_policy));
3239         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3240         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3241         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3242         pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
3243         pol->sadb_x_policy_reserved = 0;
3244         pol->sadb_x_policy_id = xp->index;
3245         pol->sadb_x_policy_priority = xp->priority;
3246
3247         /* Set sadb_comb's. */
3248         alg_size = 0;
3249         if (x->id.proto == IPPROTO_AH)
3250                 alg_size = dump_ah_combs(skb, t);
3251         else if (x->id.proto == IPPROTO_ESP)
3252                 alg_size = dump_esp_combs(skb, t);
3253
3254         hdr->sadb_msg_len += alg_size / 8;
3255
3256         /* security context */
3257         if (xfrm_ctx) {
3258                 sec_ctx = skb_put(skb,
3259                                   sizeof(struct sadb_x_sec_ctx) + ctx_size);
3260                 sec_ctx->sadb_x_sec_len =
3261                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3262                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3263                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3264                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3265                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3266                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3267                        xfrm_ctx->ctx_len);
3268         }
3269
3270         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3271                                xs_net(x));
3272 }
3273
3274 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3275                                                 u8 *data, int len, int *dir)
3276 {
3277         struct net *net = sock_net(sk);
3278         struct xfrm_policy *xp;
3279         struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3280         struct sadb_x_sec_ctx *sec_ctx;
3281
3282         switch (sk->sk_family) {
3283         case AF_INET:
3284                 if (opt != IP_IPSEC_POLICY) {
3285                         *dir = -EOPNOTSUPP;
3286                         return NULL;
3287                 }
3288                 break;
3289 #if IS_ENABLED(CONFIG_IPV6)
3290         case AF_INET6:
3291                 if (opt != IPV6_IPSEC_POLICY) {
3292                         *dir = -EOPNOTSUPP;
3293                         return NULL;
3294                 }
3295                 break;
3296 #endif
3297         default:
3298                 *dir = -EINVAL;
3299                 return NULL;
3300         }
3301
3302         *dir = -EINVAL;
3303
3304         if (len < sizeof(struct sadb_x_policy) ||
3305             pol->sadb_x_policy_len*8 > len ||
3306             pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3307             (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3308                 return NULL;
3309
3310         xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3311         if (xp == NULL) {
3312                 *dir = -ENOBUFS;
3313                 return NULL;
3314         }
3315
3316         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3317                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3318
3319         xp->lft.soft_byte_limit = XFRM_INF;
3320         xp->lft.hard_byte_limit = XFRM_INF;
3321         xp->lft.soft_packet_limit = XFRM_INF;
3322         xp->lft.hard_packet_limit = XFRM_INF;
3323         xp->family = sk->sk_family;
3324
3325         xp->xfrm_nr = 0;
3326         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3327             (*dir = parse_ipsecrequests(xp, pol)) < 0)
3328                 goto out;
3329
3330         /* security context too */
3331         if (len >= (pol->sadb_x_policy_len*8 +
3332             sizeof(struct sadb_x_sec_ctx))) {
3333                 char *p = (char *)pol;
3334                 struct xfrm_user_sec_ctx *uctx;
3335
3336                 p += pol->sadb_x_policy_len*8;
3337                 sec_ctx = (struct sadb_x_sec_ctx *)p;
3338                 if (len < pol->sadb_x_policy_len*8 +
3339                     sec_ctx->sadb_x_sec_len*8) {
3340                         *dir = -EINVAL;
3341                         goto out;
3342                 }
3343                 if ((*dir = verify_sec_ctx_len(p)))
3344                         goto out;
3345                 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC);
3346                 *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC);
3347                 kfree(uctx);
3348
3349                 if (*dir)
3350                         goto out;
3351         }
3352
3353         *dir = pol->sadb_x_policy_dir-1;
3354         return xp;
3355
3356 out:
3357         xp->walk.dead = 1;
3358         xfrm_policy_destroy(xp);
3359         return NULL;
3360 }
3361
3362 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3363 {
3364         struct sk_buff *skb;
3365         struct sadb_msg *hdr;
3366         struct sadb_sa *sa;
3367         struct sadb_address *addr;
3368         struct sadb_x_nat_t_port *n_port;
3369         int sockaddr_size;
3370         int size;
3371         __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3372         struct xfrm_encap_tmpl *natt = NULL;
3373
3374         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3375         if (!sockaddr_size)
3376                 return -EINVAL;
3377
3378         if (!satype)
3379                 return -EINVAL;
3380
3381         if (!x->encap)
3382                 return -EINVAL;
3383
3384         natt = x->encap;
3385
3386         /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3387          *
3388          * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3389          * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3390          */
3391
3392         size = sizeof(struct sadb_msg) +
3393                 sizeof(struct sadb_sa) +
3394                 (sizeof(struct sadb_address) * 2) +
3395                 (sockaddr_size * 2) +
3396                 (sizeof(struct sadb_x_nat_t_port) * 2);
3397
3398         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3399         if (skb == NULL)
3400                 return -ENOMEM;
3401
3402         hdr = skb_put(skb, sizeof(struct sadb_msg));
3403         hdr->sadb_msg_version = PF_KEY_V2;
3404         hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3405         hdr->sadb_msg_satype = satype;
3406         hdr->sadb_msg_len = size / sizeof(uint64_t);
3407         hdr->sadb_msg_errno = 0;
3408         hdr->sadb_msg_reserved = 0;
3409         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3410         hdr->sadb_msg_pid = 0;
3411
3412         /* SA */
3413         sa = skb_put(skb, sizeof(struct sadb_sa));
3414         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3415         sa->sadb_sa_exttype = SADB_EXT_SA;
3416         sa->sadb_sa_spi = x->id.spi;
3417         sa->sadb_sa_replay = 0;
3418         sa->sadb_sa_state = 0;
3419         sa->sadb_sa_auth = 0;
3420         sa->sadb_sa_encrypt = 0;
3421         sa->sadb_sa_flags = 0;
3422
3423         /* ADDRESS_SRC (old addr) */
3424         addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3425         addr->sadb_address_len =
3426                 (sizeof(struct sadb_address)+sockaddr_size)/
3427                         sizeof(uint64_t);
3428         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3429         addr->sadb_address_proto = 0;
3430         addr->sadb_address_reserved = 0;
3431         addr->sadb_address_prefixlen =
3432                 pfkey_sockaddr_fill(&x->props.saddr, 0,
3433                                     (struct sockaddr *) (addr + 1),
3434                                     x->props.family);
3435         if (!addr->sadb_address_prefixlen)
3436                 BUG();
3437
3438         /* NAT_T_SPORT (old port) */
3439         n_port = skb_put(skb, sizeof(*n_port));
3440         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3441         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3442         n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3443         n_port->sadb_x_nat_t_port_reserved = 0;
3444
3445         /* ADDRESS_DST (new addr) */
3446         addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
3447         addr->sadb_address_len =
3448                 (sizeof(struct sadb_address)+sockaddr_size)/
3449                         sizeof(uint64_t);
3450         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3451         addr->sadb_address_proto = 0;
3452         addr->sadb_address_reserved = 0;
3453         addr->sadb_address_prefixlen =
3454                 pfkey_sockaddr_fill(ipaddr, 0,
3455                                     (struct sockaddr *) (addr + 1),
3456                                     x->props.family);
3457         if (!addr->sadb_address_prefixlen)
3458                 BUG();
3459
3460         /* NAT_T_DPORT (new port) */
3461         n_port = skb_put(skb, sizeof(*n_port));
3462         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3463         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3464         n_port->sadb_x_nat_t_port_port = sport;
3465         n_port->sadb_x_nat_t_port_reserved = 0;
3466
3467         return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3468                                xs_net(x));
3469 }
3470
3471 #ifdef CONFIG_NET_KEY_MIGRATE
3472 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3473                             const struct xfrm_selector *sel)
3474 {
3475         struct sadb_address *addr;
3476         addr = skb_put(skb, sizeof(struct sadb_address) + sasize);
3477         addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3478         addr->sadb_address_exttype = type;
3479         addr->sadb_address_proto = sel->proto;
3480         addr->sadb_address_reserved = 0;
3481
3482         switch (type) {
3483         case SADB_EXT_ADDRESS_SRC:
3484                 addr->sadb_address_prefixlen = sel->prefixlen_s;
3485                 pfkey_sockaddr_fill(&sel->saddr, 0,
3486                                     (struct sockaddr *)(addr + 1),
3487                                     sel->family);
3488                 break;
3489         case SADB_EXT_ADDRESS_DST:
3490                 addr->sadb_address_prefixlen = sel->prefixlen_d;
3491                 pfkey_sockaddr_fill(&sel->daddr, 0,
3492                                     (struct sockaddr *)(addr + 1),
3493                                     sel->family);
3494                 break;
3495         default:
3496                 return -EINVAL;
3497         }
3498
3499         return 0;
3500 }
3501
3502
3503 static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
3504 {
3505         struct sadb_x_kmaddress *kma;
3506         u8 *sa;
3507         int family = k->family;
3508         int socklen = pfkey_sockaddr_len(family);
3509         int size_req;
3510
3511         size_req = (sizeof(struct sadb_x_kmaddress) +
3512                     pfkey_sockaddr_pair_size(family));
3513
3514         kma = skb_put_zero(skb, size_req);
3515         kma->sadb_x_kmaddress_len = size_req / 8;
3516         kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3517         kma->sadb_x_kmaddress_reserved = k->reserved;
3518
3519         sa = (u8 *)(kma + 1);
3520         if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3521             !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3522                 return -EINVAL;
3523
3524         return 0;
3525 }
3526
3527 static int set_ipsecrequest(struct sk_buff *skb,
3528                             uint8_t proto, uint8_t mode, int level,
3529                             uint32_t reqid, uint8_t family,
3530                             const xfrm_address_t *src, const xfrm_address_t *dst)
3531 {
3532         struct sadb_x_ipsecrequest *rq;
3533         u8 *sa;
3534         int socklen = pfkey_sockaddr_len(family);
3535         int size_req;
3536
3537         size_req = sizeof(struct sadb_x_ipsecrequest) +
3538                    pfkey_sockaddr_pair_size(family);
3539
3540         rq = skb_put_zero(skb, size_req);
3541         rq->sadb_x_ipsecrequest_len = size_req;
3542         rq->sadb_x_ipsecrequest_proto = proto;
3543         rq->sadb_x_ipsecrequest_mode = mode;
3544         rq->sadb_x_ipsecrequest_level = level;
3545         rq->sadb_x_ipsecrequest_reqid = reqid;
3546
3547         sa = (u8 *) (rq + 1);
3548         if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3549             !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3550                 return -EINVAL;
3551
3552         return 0;
3553 }
3554 #endif
3555
3556 #ifdef CONFIG_NET_KEY_MIGRATE
3557 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3558                               const struct xfrm_migrate *m, int num_bundles,
3559                               const struct xfrm_kmaddress *k,
3560                               const struct xfrm_encap_tmpl *encap)
3561 {
3562         int i;
3563         int sasize_sel;
3564         int size = 0;
3565         int size_pol = 0;
3566         struct sk_buff *skb;
3567         struct sadb_msg *hdr;
3568         struct sadb_x_policy *pol;
3569         const struct xfrm_migrate *mp;
3570
3571         if (type != XFRM_POLICY_TYPE_MAIN)
3572                 return 0;
3573
3574         if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3575                 return -EINVAL;
3576
3577         if (k != NULL) {
3578                 /* addresses for KM */
3579                 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3580                                      pfkey_sockaddr_pair_size(k->family));
3581         }
3582
3583         /* selector */
3584         sasize_sel = pfkey_sockaddr_size(sel->family);
3585         if (!sasize_sel)
3586                 return -EINVAL;
3587         size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3588
3589         /* policy info */
3590         size_pol += sizeof(struct sadb_x_policy);
3591
3592         /* ipsecrequests */
3593         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3594                 /* old locator pair */
3595                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3596                             pfkey_sockaddr_pair_size(mp->old_family);
3597                 /* new locator pair */
3598                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3599                             pfkey_sockaddr_pair_size(mp->new_family);
3600         }
3601
3602         size += sizeof(struct sadb_msg) + size_pol;
3603
3604         /* alloc buffer */
3605         skb = alloc_skb(size, GFP_ATOMIC);
3606         if (skb == NULL)
3607                 return -ENOMEM;
3608
3609         hdr = skb_put(skb, sizeof(struct sadb_msg));
3610         hdr->sadb_msg_version = PF_KEY_V2;
3611         hdr->sadb_msg_type = SADB_X_MIGRATE;
3612         hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3613         hdr->sadb_msg_len = size / 8;
3614         hdr->sadb_msg_errno = 0;
3615         hdr->sadb_msg_reserved = 0;
3616         hdr->sadb_msg_seq = 0;
3617         hdr->sadb_msg_pid = 0;
3618
3619         /* Addresses to be used by KM for negotiation, if ext is available */
3620         if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3621                 goto err;
3622
3623         /* selector src */
3624         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3625
3626         /* selector dst */
3627         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3628
3629         /* policy information */
3630         pol = skb_put(skb, sizeof(struct sadb_x_policy));
3631         pol->sadb_x_policy_len = size_pol / 8;
3632         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3633         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3634         pol->sadb_x_policy_dir = dir + 1;
3635         pol->sadb_x_policy_reserved = 0;
3636         pol->sadb_x_policy_id = 0;
3637         pol->sadb_x_policy_priority = 0;
3638
3639         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3640                 /* old ipsecrequest */
3641                 int mode = pfkey_mode_from_xfrm(mp->mode);
3642                 if (mode < 0)
3643                         goto err;
3644                 if (set_ipsecrequest(skb, mp->proto, mode,
3645                                      (mp->reqid ?  IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3646                                      mp->reqid, mp->old_family,
3647                                      &mp->old_saddr, &mp->old_daddr) < 0)
3648                         goto err;
3649
3650                 /* new ipsecrequest */
3651                 if (set_ipsecrequest(skb, mp->proto, mode,
3652                                      (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3653                                      mp->reqid, mp->new_family,
3654                                      &mp->new_saddr, &mp->new_daddr) < 0)
3655                         goto err;
3656         }
3657
3658         /* broadcast migrate message to sockets */
3659         pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
3660
3661         return 0;
3662
3663 err:
3664         kfree_skb(skb);
3665         return -EINVAL;
3666 }
3667 #else
3668 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3669                               const struct xfrm_migrate *m, int num_bundles,
3670                               const struct xfrm_kmaddress *k,
3671                               const struct xfrm_encap_tmpl *encap)
3672 {
3673         return -ENOPROTOOPT;
3674 }
3675 #endif
3676
3677 static int pfkey_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
3678 {
3679         struct sock *sk = sock->sk;
3680         struct sk_buff *skb = NULL;
3681         struct sadb_msg *hdr = NULL;
3682         int err;
3683         struct net *net = sock_net(sk);
3684
3685         err = -EOPNOTSUPP;
3686         if (msg->msg_flags & MSG_OOB)
3687                 goto out;
3688
3689         err = -EMSGSIZE;
3690         if ((unsigned int)len > sk->sk_sndbuf - 32)
3691                 goto out;
3692
3693         err = -ENOBUFS;
3694         skb = alloc_skb(len, GFP_KERNEL);
3695         if (skb == NULL)
3696                 goto out;
3697
3698         err = -EFAULT;
3699         if (memcpy_from_msg(skb_put(skb,len), msg, len))
3700                 goto out;
3701
3702         hdr = pfkey_get_base_msg(skb, &err);
3703         if (!hdr)
3704                 goto out;
3705
3706         mutex_lock(&net->xfrm.xfrm_cfg_mutex);
3707         err = pfkey_process(sk, skb, hdr);
3708         mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
3709
3710 out:
3711         if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3712                 err = 0;
3713         kfree_skb(skb);
3714
3715         return err ? : len;
3716 }
3717
3718 static int pfkey_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
3719                          int flags)
3720 {
3721         struct sock *sk = sock->sk;
3722         struct pfkey_sock *pfk = pfkey_sk(sk);
3723         struct sk_buff *skb;
3724         int copied, err;
3725
3726         err = -EINVAL;
3727         if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3728                 goto out;
3729
3730         skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3731         if (skb == NULL)
3732                 goto out;
3733
3734         copied = skb->len;
3735         if (copied > len) {
3736                 msg->msg_flags |= MSG_TRUNC;
3737                 copied = len;
3738         }
3739
3740         skb_reset_transport_header(skb);
3741         err = skb_copy_datagram_msg(skb, 0, msg, copied);
3742         if (err)
3743                 goto out_free;
3744
3745         sock_recv_ts_and_drops(msg, sk, skb);
3746
3747         err = (flags & MSG_TRUNC) ? skb->len : copied;
3748
3749         if (pfk->dump.dump != NULL &&
3750             3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3751                 pfkey_do_dump(pfk);
3752
3753 out_free:
3754         skb_free_datagram(sk, skb);
3755 out:
3756         return err;
3757 }
3758
3759 static const struct proto_ops pfkey_ops = {
3760         .family         =       PF_KEY,
3761         .owner          =       THIS_MODULE,
3762         /* Operations that make no sense on pfkey sockets. */
3763         .bind           =       sock_no_bind,
3764         .connect        =       sock_no_connect,
3765         .socketpair     =       sock_no_socketpair,
3766         .accept         =       sock_no_accept,
3767         .getname        =       sock_no_getname,
3768         .ioctl          =       sock_no_ioctl,
3769         .listen         =       sock_no_listen,
3770         .shutdown       =       sock_no_shutdown,
3771         .setsockopt     =       sock_no_setsockopt,
3772         .getsockopt     =       sock_no_getsockopt,
3773         .mmap           =       sock_no_mmap,
3774         .sendpage       =       sock_no_sendpage,
3775
3776         /* Now the operations that really occur. */
3777         .release        =       pfkey_release,
3778         .poll           =       datagram_poll,
3779         .sendmsg        =       pfkey_sendmsg,
3780         .recvmsg        =       pfkey_recvmsg,
3781 };
3782
3783 static const struct net_proto_family pfkey_family_ops = {
3784         .family =       PF_KEY,
3785         .create =       pfkey_create,
3786         .owner  =       THIS_MODULE,
3787 };
3788
3789 #ifdef CONFIG_PROC_FS
3790 static int pfkey_seq_show(struct seq_file *f, void *v)
3791 {
3792         struct sock *s = sk_entry(v);
3793
3794         if (v == SEQ_START_TOKEN)
3795                 seq_printf(f ,"sk       RefCnt Rmem   Wmem   User   Inode\n");
3796         else
3797                 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
3798                                s,
3799                                refcount_read(&s->sk_refcnt),
3800                                sk_rmem_alloc_get(s),
3801                                sk_wmem_alloc_get(s),
3802                                from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
3803                                sock_i_ino(s)
3804                                );
3805         return 0;
3806 }
3807
3808 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3809         __acquires(rcu)
3810 {
3811         struct net *net = seq_file_net(f);
3812         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3813
3814         rcu_read_lock();
3815         return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
3816 }
3817
3818 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3819 {
3820         struct net *net = seq_file_net(f);
3821         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3822
3823         return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
3824 }
3825
3826 static void pfkey_seq_stop(struct seq_file *f, void *v)
3827         __releases(rcu)
3828 {
3829         rcu_read_unlock();
3830 }
3831
3832 static const struct seq_operations pfkey_seq_ops = {
3833         .start  = pfkey_seq_start,
3834         .next   = pfkey_seq_next,
3835         .stop   = pfkey_seq_stop,
3836         .show   = pfkey_seq_show,
3837 };
3838
3839 static int pfkey_seq_open(struct inode *inode, struct file *file)
3840 {
3841         return seq_open_net(inode, file, &pfkey_seq_ops,
3842                             sizeof(struct seq_net_private));
3843 }
3844
3845 static const struct file_operations pfkey_proc_ops = {
3846         .open    = pfkey_seq_open,
3847         .read    = seq_read,
3848         .llseek  = seq_lseek,
3849         .release = seq_release_net,
3850 };
3851
3852 static int __net_init pfkey_init_proc(struct net *net)
3853 {
3854         struct proc_dir_entry *e;
3855
3856         e = proc_create("pfkey", 0, net->proc_net, &pfkey_proc_ops);
3857         if (e == NULL)
3858                 return -ENOMEM;
3859
3860         return 0;
3861 }
3862
3863 static void __net_exit pfkey_exit_proc(struct net *net)
3864 {
3865         remove_proc_entry("pfkey", net->proc_net);
3866 }
3867 #else
3868 static inline int pfkey_init_proc(struct net *net)
3869 {
3870         return 0;
3871 }
3872
3873 static inline void pfkey_exit_proc(struct net *net)
3874 {
3875 }
3876 #endif
3877
3878 static struct xfrm_mgr pfkeyv2_mgr =
3879 {
3880         .notify         = pfkey_send_notify,
3881         .acquire        = pfkey_send_acquire,
3882         .compile_policy = pfkey_compile_policy,
3883         .new_mapping    = pfkey_send_new_mapping,
3884         .notify_policy  = pfkey_send_policy_notify,
3885         .migrate        = pfkey_send_migrate,
3886         .is_alive       = pfkey_is_alive,
3887 };
3888
3889 static int __net_init pfkey_net_init(struct net *net)
3890 {
3891         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3892         int rv;
3893
3894         INIT_HLIST_HEAD(&net_pfkey->table);
3895         atomic_set(&net_pfkey->socks_nr, 0);
3896
3897         rv = pfkey_init_proc(net);
3898
3899         return rv;
3900 }
3901
3902 static void __net_exit pfkey_net_exit(struct net *net)
3903 {
3904         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3905
3906         pfkey_exit_proc(net);
3907         BUG_ON(!hlist_empty(&net_pfkey->table));
3908 }
3909
3910 static struct pernet_operations pfkey_net_ops = {
3911         .init = pfkey_net_init,
3912         .exit = pfkey_net_exit,
3913         .id   = &pfkey_net_id,
3914         .size = sizeof(struct netns_pfkey),
3915 };
3916
3917 static void __exit ipsec_pfkey_exit(void)
3918 {
3919         xfrm_unregister_km(&pfkeyv2_mgr);
3920         sock_unregister(PF_KEY);
3921         unregister_pernet_subsys(&pfkey_net_ops);
3922         proto_unregister(&key_proto);
3923 }
3924
3925 static int __init ipsec_pfkey_init(void)
3926 {
3927         int err = proto_register(&key_proto, 0);
3928
3929         if (err != 0)
3930                 goto out;
3931
3932         err = register_pernet_subsys(&pfkey_net_ops);
3933         if (err != 0)
3934                 goto out_unregister_key_proto;
3935         err = sock_register(&pfkey_family_ops);
3936         if (err != 0)
3937                 goto out_unregister_pernet;
3938         err = xfrm_register_km(&pfkeyv2_mgr);
3939         if (err != 0)
3940                 goto out_sock_unregister;
3941 out:
3942         return err;
3943
3944 out_sock_unregister:
3945         sock_unregister(PF_KEY);
3946 out_unregister_pernet:
3947         unregister_pernet_subsys(&pfkey_net_ops);
3948 out_unregister_key_proto:
3949         proto_unregister(&key_proto);
3950         goto out;
3951 }
3952
3953 module_init(ipsec_pfkey_init);
3954 module_exit(ipsec_pfkey_exit);
3955 MODULE_LICENSE("GPL");
3956 MODULE_ALIAS_NETPROTO(PF_KEY);