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(atomic_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, struct sk_buff **skb2,
 200                                gfp_t allocation, struct sock *sk)
 201 {
 202         int err = -ENOBUFS;
 203
 204         sock_hold(sk);
 205         if (*skb2 == NULL) {
 206                 if (atomic_read(&skb->users) != 1) {
 207                         *skb2 = skb_clone(skb, allocation);
 208                 } else {
 209                         *skb2 = skb;
 210                         atomic_inc(&skb->users);
 211                 }
 212         }
 213         if (*skb2 != NULL) {
 214                 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
 215                         skb_set_owner_r(*skb2, sk);
 216                         skb_queue_tail(&sk->sk_receive_queue, *skb2);
 217                         sk->sk_data_ready(sk);
 218                         *skb2 = NULL;
 219                         err = 0;
 220                 }
 221         }
 222         sock_put(sk);
 223         return err;
 224 }
 225
 226 /* Send SKB to all pfkey sockets matching selected criteria.  */
 227 #define BROADCAST_ALL           0
 228 #define BROADCAST_ONE           1
 229 #define BROADCAST_REGISTERED    2
 230 #define BROADCAST_PROMISC_ONLY  4
 231 static int pfkey_broadcast(struct sk_buff *skb,
 232                            int broadcast_flags, struct sock *one_sk,
 233                            struct net *net)
 234 {
 235         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
 236         struct sock *sk;
 237         struct sk_buff *skb2 = NULL;
 238         int err = -ESRCH;
 239
 240         /* XXX Do we need something like netlink_overrun?  I think
 241          * XXX PF_KEY socket apps will not mind current behavior.
 242          */
 243         if (!skb)
 244                 return -ENOMEM;
 245
 246         rcu_read_lock();
 247         sk_for_each_rcu(sk, &net_pfkey->table) {
 248                 struct pfkey_sock *pfk = pfkey_sk(sk);
 249                 int err2;
 250
 251                 /* Yes, it means that if you are meant to receive this
 252                  * pfkey message you receive it twice as promiscuous
 253                  * socket.
 254                  */
 255                 if (pfk->promisc)
 256                         pfkey_broadcast_one(skb, &skb2, GFP_ATOMIC, sk);
 257
 258                 /* the exact target will be processed later */
 259                 if (sk == one_sk)
 260                         continue;
 261                 if (broadcast_flags != BROADCAST_ALL) {
 262                         if (broadcast_flags & BROADCAST_PROMISC_ONLY)
 263                                 continue;
 264                         if ((broadcast_flags & BROADCAST_REGISTERED) &&
 265                             !pfk->registered)
 266                                 continue;
 267                         if (broadcast_flags & BROADCAST_ONE)
 268                                 continue;
 269                 }
 270
 271                 err2 = pfkey_broadcast_one(skb, &skb2, GFP_ATOMIC, sk);
 272
 273                 /* Error is cleared after successful sending to at least one
 274                  * registered KM */
 275                 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
 276                         err = err2;
 277         }
 278         rcu_read_unlock();
 279
 280         if (one_sk != NULL)
 281                 err = pfkey_broadcast_one(skb, &skb2, GFP_KERNEL, one_sk);
 282
 283         kfree_skb(skb2);
 284         kfree_skb(skb);
 285         return err;
 286 }
 287
 288 static int pfkey_do_dump(struct pfkey_sock *pfk)
 289 {
 290         struct sadb_msg *hdr;
 291         int rc;
 292
 293         mutex_lock(&pfk->dump_lock);
 294         if (!pfk->dump.dump) {
 295                 rc = 0;
 296                 goto out;
 297         }
 298
 299         rc = pfk->dump.dump(pfk);
 300         if (rc == -ENOBUFS) {
 301                 rc = 0;
 302                 goto out;
 303         }
 304
 305         if (pfk->dump.skb) {
 306                 if (!pfkey_can_dump(&pfk->sk)) {
 307                         rc = 0;
 308                         goto out;
 309                 }
 310
 311                 hdr = (struct sadb_msg *) pfk->dump.skb->data;
 312                 hdr->sadb_msg_seq = 0;
 313                 hdr->sadb_msg_errno = rc;
 314                 pfkey_broadcast(pfk->dump.skb, BROADCAST_ONE,
 315                                 &pfk->sk, sock_net(&pfk->sk));
 316                 pfk->dump.skb = NULL;
 317         }
 318
 319         pfkey_terminate_dump(pfk);
 320
 321 out:
 322         mutex_unlock(&pfk->dump_lock);
 323         return rc;
 324 }
 325
 326 static inline void pfkey_hdr_dup(struct sadb_msg *new,
 327                                  const struct sadb_msg *orig)
 328 {
 329         *new = *orig;
 330 }
 331
 332 static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk)
 333 {
 334         struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
 335         struct sadb_msg *hdr;
 336
 337         if (!skb)
 338                 return -ENOBUFS;
 339
 340         /* Woe be to the platform trying to support PFKEY yet
 341          * having normal errnos outside the 1-255 range, inclusive.
 342          */
 343         err = -err;
 344         if (err == ERESTARTSYS ||
 345             err == ERESTARTNOHAND ||
 346             err == ERESTARTNOINTR)
 347                 err = EINTR;
 348         if (err >= 512)
 349                 err = EINVAL;
 350         BUG_ON(err <= 0 || err >= 256);
 351
 352         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
 353         pfkey_hdr_dup(hdr, orig);
 354         hdr->sadb_msg_errno = (uint8_t) err;
 355         hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
 356                              sizeof(uint64_t));
 357
 358         pfkey_broadcast(skb, BROADCAST_ONE, sk, sock_net(sk));
 359
 360         return 0;
 361 }
 362
 363 static const u8 sadb_ext_min_len[] = {
 364         [SADB_EXT_RESERVED]             = (u8) 0,
 365         [SADB_EXT_SA]                   = (u8) sizeof(struct sadb_sa),
 366         [SADB_EXT_LIFETIME_CURRENT]     = (u8) sizeof(struct sadb_lifetime),
 367         [SADB_EXT_LIFETIME_HARD]        = (u8) sizeof(struct sadb_lifetime),
 368         [SADB_EXT_LIFETIME_SOFT]        = (u8) sizeof(struct sadb_lifetime),
 369         [SADB_EXT_ADDRESS_SRC]          = (u8) sizeof(struct sadb_address),
 370         [SADB_EXT_ADDRESS_DST]          = (u8) sizeof(struct sadb_address),
 371         [SADB_EXT_ADDRESS_PROXY]        = (u8) sizeof(struct sadb_address),
 372         [SADB_EXT_KEY_AUTH]             = (u8) sizeof(struct sadb_key),
 373         [SADB_EXT_KEY_ENCRYPT]          = (u8) sizeof(struct sadb_key),
 374         [SADB_EXT_IDENTITY_SRC]         = (u8) sizeof(struct sadb_ident),
 375         [SADB_EXT_IDENTITY_DST]         = (u8) sizeof(struct sadb_ident),
 376         [SADB_EXT_SENSITIVITY]          = (u8) sizeof(struct sadb_sens),
 377         [SADB_EXT_PROPOSAL]             = (u8) sizeof(struct sadb_prop),
 378         [SADB_EXT_SUPPORTED_AUTH]       = (u8) sizeof(struct sadb_supported),
 379         [SADB_EXT_SUPPORTED_ENCRYPT]    = (u8) sizeof(struct sadb_supported),
 380         [SADB_EXT_SPIRANGE]             = (u8) sizeof(struct sadb_spirange),
 381         [SADB_X_EXT_KMPRIVATE]          = (u8) sizeof(struct sadb_x_kmprivate),
 382         [SADB_X_EXT_POLICY]             = (u8) sizeof(struct sadb_x_policy),
 383         [SADB_X_EXT_SA2]                = (u8) sizeof(struct sadb_x_sa2),
 384         [SADB_X_EXT_NAT_T_TYPE]         = (u8) sizeof(struct sadb_x_nat_t_type),
 385         [SADB_X_EXT_NAT_T_SPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
 386         [SADB_X_EXT_NAT_T_DPORT]        = (u8) sizeof(struct sadb_x_nat_t_port),
 387         [SADB_X_EXT_NAT_T_OA]           = (u8) sizeof(struct sadb_address),
 388         [SADB_X_EXT_SEC_CTX]            = (u8) sizeof(struct sadb_x_sec_ctx),
 389         [SADB_X_EXT_KMADDRESS]          = (u8) sizeof(struct sadb_x_kmaddress),
 390         [SADB_X_EXT_FILTER]             = (u8) sizeof(struct sadb_x_filter),
 391 };
 392
 393 /* Verify sadb_address_{len,prefixlen} against sa_family.  */
 394 static int verify_address_len(const void *p)
 395 {
 396         const struct sadb_address *sp = p;
 397         const struct sockaddr *addr = (const struct sockaddr *)(sp + 1);
 398         const struct sockaddr_in *sin;
 399 #if IS_ENABLED(CONFIG_IPV6)
 400         const struct sockaddr_in6 *sin6;
 401 #endif
 402         int len;
 403
 404         switch (addr->sa_family) {
 405         case AF_INET:
 406                 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
 407                 if (sp->sadb_address_len != len ||
 408                     sp->sadb_address_prefixlen > 32)
 409                         return -EINVAL;
 410                 break;
 411 #if IS_ENABLED(CONFIG_IPV6)
 412         case AF_INET6:
 413                 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
 414                 if (sp->sadb_address_len != len ||
 415                     sp->sadb_address_prefixlen > 128)
 416                         return -EINVAL;
 417                 break;
 418 #endif
 419         default:
 420                 /* It is user using kernel to keep track of security
 421                  * associations for another protocol, such as
 422                  * OSPF/RSVP/RIPV2/MIP.  It is user's job to verify
 423                  * lengths.
 424                  *
 425                  * XXX Actually, association/policy database is not yet
 426                  * XXX able to cope with arbitrary sockaddr families.
 427                  * XXX When it can, remove this -EINVAL.  -DaveM
 428                  */
 429                 return -EINVAL;
 430         }
 431
 432         return 0;
 433 }
 434
 435 static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx)
 436 {
 437         return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
 438                             sec_ctx->sadb_x_ctx_len,
 439                             sizeof(uint64_t));
 440 }
 441
 442 static inline int verify_sec_ctx_len(const void *p)
 443 {
 444         const struct sadb_x_sec_ctx *sec_ctx = p;
 445         int len = sec_ctx->sadb_x_ctx_len;
 446
 447         if (len > PAGE_SIZE)
 448                 return -EINVAL;
 449
 450         len = pfkey_sec_ctx_len(sec_ctx);
 451
 452         if (sec_ctx->sadb_x_sec_len != len)
 453                 return -EINVAL;
 454
 455         return 0;
 456 }
 457
 458 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx,
 459                                                                      gfp_t gfp)
 460 {
 461         struct xfrm_user_sec_ctx *uctx = NULL;
 462         int ctx_size = sec_ctx->sadb_x_ctx_len;
 463
 464         uctx = kmalloc((sizeof(*uctx)+ctx_size), gfp);
 465
 466         if (!uctx)
 467                 return NULL;
 468
 469         uctx->len = pfkey_sec_ctx_len(sec_ctx);
 470         uctx->exttype = sec_ctx->sadb_x_sec_exttype;
 471         uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
 472         uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
 473         uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
 474         memcpy(uctx + 1, sec_ctx + 1,
 475                uctx->ctx_len);
 476
 477         return uctx;
 478 }
 479
 480 static int present_and_same_family(const struct sadb_address *src,
 481                                    const struct sadb_address *dst)
 482 {
 483         const struct sockaddr *s_addr, *d_addr;
 484
 485         if (!src || !dst)
 486                 return 0;
 487
 488         s_addr = (const struct sockaddr *)(src + 1);
 489         d_addr = (const struct sockaddr *)(dst + 1);
 490         if (s_addr->sa_family != d_addr->sa_family)
 491                 return 0;
 492         if (s_addr->sa_family != AF_INET
 493 #if IS_ENABLED(CONFIG_IPV6)
 494             && s_addr->sa_family != AF_INET6
 495 #endif
 496                 )
 497                 return 0;
 498
 499         return 1;
 500 }
 501
 502 static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs)
 503 {
 504         const char *p = (char *) hdr;
 505         int len = skb->len;
 506
 507         len -= sizeof(*hdr);
 508         p += sizeof(*hdr);
 509         while (len > 0) {
 510                 const struct sadb_ext *ehdr = (const struct sadb_ext *) p;
 511                 uint16_t ext_type;
 512                 int ext_len;
 513
 514                 ext_len  = ehdr->sadb_ext_len;
 515                 ext_len *= sizeof(uint64_t);
 516                 ext_type = ehdr->sadb_ext_type;
 517                 if (ext_len < sizeof(uint64_t) ||
 518                     ext_len > len ||
 519                     ext_type == SADB_EXT_RESERVED)
 520                         return -EINVAL;
 521
 522                 if (ext_type <= SADB_EXT_MAX) {
 523                         int min = (int) sadb_ext_min_len[ext_type];
 524                         if (ext_len < min)
 525                                 return -EINVAL;
 526                         if (ext_hdrs[ext_type-1] != NULL)
 527                                 return -EINVAL;
 528                         if (ext_type == SADB_EXT_ADDRESS_SRC ||
 529                             ext_type == SADB_EXT_ADDRESS_DST ||
 530                             ext_type == SADB_EXT_ADDRESS_PROXY ||
 531                             ext_type == SADB_X_EXT_NAT_T_OA) {
 532                                 if (verify_address_len(p))
 533                                         return -EINVAL;
 534                         }
 535                         if (ext_type == SADB_X_EXT_SEC_CTX) {
 536                                 if (verify_sec_ctx_len(p))
 537                                         return -EINVAL;
 538                         }
 539                         ext_hdrs[ext_type-1] = (void *) p;
 540                 }
 541                 p   += ext_len;
 542                 len -= ext_len;
 543         }
 544
 545         return 0;
 546 }
 547
 548 static uint16_t
 549 pfkey_satype2proto(uint8_t satype)
 550 {
 551         switch (satype) {
 552         case SADB_SATYPE_UNSPEC:
 553                 return IPSEC_PROTO_ANY;
 554         case SADB_SATYPE_AH:
 555                 return IPPROTO_AH;
 556         case SADB_SATYPE_ESP:
 557                 return IPPROTO_ESP;
 558         case SADB_X_SATYPE_IPCOMP:
 559                 return IPPROTO_COMP;
 560         default:
 561                 return 0;
 562         }
 563         /* NOTREACHED */
 564 }
 565
 566 static uint8_t
 567 pfkey_proto2satype(uint16_t proto)
 568 {
 569         switch (proto) {
 570         case IPPROTO_AH:
 571                 return SADB_SATYPE_AH;
 572         case IPPROTO_ESP:
 573                 return SADB_SATYPE_ESP;
 574         case IPPROTO_COMP:
 575                 return SADB_X_SATYPE_IPCOMP;
 576         default:
 577                 return 0;
 578         }
 579         /* NOTREACHED */
 580 }
 581
 582 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
 583  * say specifically 'just raw sockets' as we encode them as 255.
 584  */
 585
 586 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
 587 {
 588         return proto == IPSEC_PROTO_ANY ? 0 : proto;
 589 }
 590
 591 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
 592 {
 593         return proto ? proto : IPSEC_PROTO_ANY;
 594 }
 595
 596 static inline int pfkey_sockaddr_len(sa_family_t family)
 597 {
 598         switch (family) {
 599         case AF_INET:
 600                 return sizeof(struct sockaddr_in);
 601 #if IS_ENABLED(CONFIG_IPV6)
 602         case AF_INET6:
 603                 return sizeof(struct sockaddr_in6);
 604 #endif
 605         }
 606         return 0;
 607 }
 608
 609 static
 610 int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
 611 {
 612         switch (sa->sa_family) {
 613         case AF_INET:
 614                 xaddr->a4 =
 615                         ((struct sockaddr_in *)sa)->sin_addr.s_addr;
 616                 return AF_INET;
 617 #if IS_ENABLED(CONFIG_IPV6)
 618         case AF_INET6:
 619                 memcpy(xaddr->a6,
 620                        &((struct sockaddr_in6 *)sa)->sin6_addr,
 621                        sizeof(struct in6_addr));
 622                 return AF_INET6;
 623 #endif
 624         }
 625         return 0;
 626 }
 627
 628 static
 629 int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr)
 630 {
 631         return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
 632                                       xaddr);
 633 }
 634
 635 static struct  xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs)
 636 {
 637         const struct sadb_sa *sa;
 638         const struct sadb_address *addr;
 639         uint16_t proto;
 640         unsigned short family;
 641         xfrm_address_t *xaddr;
 642
 643         sa = ext_hdrs[SADB_EXT_SA - 1];
 644         if (sa == NULL)
 645                 return NULL;
 646
 647         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
 648         if (proto == 0)
 649                 return NULL;
 650
 651         /* sadb_address_len should be checked by caller */
 652         addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
 653         if (addr == NULL)
 654                 return NULL;
 655
 656         family = ((const struct sockaddr *)(addr + 1))->sa_family;
 657         switch (family) {
 658         case AF_INET:
 659                 xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr;
 660                 break;
 661 #if IS_ENABLED(CONFIG_IPV6)
 662         case AF_INET6:
 663                 xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr;
 664                 break;
 665 #endif
 666         default:
 667                 xaddr = NULL;
 668         }
 669
 670         if (!xaddr)
 671                 return NULL;
 672
 673         return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family);
 674 }
 675
 676 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
 677
 678 static int
 679 pfkey_sockaddr_size(sa_family_t family)
 680 {
 681         return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
 682 }
 683
 684 static inline int pfkey_mode_from_xfrm(int mode)
 685 {
 686         switch(mode) {
 687         case XFRM_MODE_TRANSPORT:
 688                 return IPSEC_MODE_TRANSPORT;
 689         case XFRM_MODE_TUNNEL:
 690                 return IPSEC_MODE_TUNNEL;
 691         case XFRM_MODE_BEET:
 692                 return IPSEC_MODE_BEET;
 693         default:
 694                 return -1;
 695         }
 696 }
 697
 698 static inline int pfkey_mode_to_xfrm(int mode)
 699 {
 700         switch(mode) {
 701         case IPSEC_MODE_ANY:    /*XXX*/
 702         case IPSEC_MODE_TRANSPORT:
 703                 return XFRM_MODE_TRANSPORT;
 704         case IPSEC_MODE_TUNNEL:
 705                 return XFRM_MODE_TUNNEL;
 706         case IPSEC_MODE_BEET:
 707                 return XFRM_MODE_BEET;
 708         default:
 709                 return -1;
 710         }
 711 }
 712
 713 static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port,
 714                                         struct sockaddr *sa,
 715                                         unsigned short family)
 716 {
 717         switch (family) {
 718         case AF_INET:
 719             {
 720                 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 721                 sin->sin_family = AF_INET;
 722                 sin->sin_port = port;
 723                 sin->sin_addr.s_addr = xaddr->a4;
 724                 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
 725                 return 32;
 726             }
 727 #if IS_ENABLED(CONFIG_IPV6)
 728         case AF_INET6:
 729             {
 730                 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 731                 sin6->sin6_family = AF_INET6;
 732                 sin6->sin6_port = port;
 733                 sin6->sin6_flowinfo = 0;
 734                 sin6->sin6_addr = xaddr->in6;
 735                 sin6->sin6_scope_id = 0;
 736                 return 128;
 737             }
 738 #endif
 739         }
 740         return 0;
 741 }
 742
 743 static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x,
 744                                               int add_keys, int hsc)
 745 {
 746         struct sk_buff *skb;
 747         struct sadb_msg *hdr;
 748         struct sadb_sa *sa;
 749         struct sadb_lifetime *lifetime;
 750         struct sadb_address *addr;
 751         struct sadb_key *key;
 752         struct sadb_x_sa2 *sa2;
 753         struct sadb_x_sec_ctx *sec_ctx;
 754         struct xfrm_sec_ctx *xfrm_ctx;
 755         int ctx_size = 0;
 756         int size;
 757         int auth_key_size = 0;
 758         int encrypt_key_size = 0;
 759         int sockaddr_size;
 760         struct xfrm_encap_tmpl *natt = NULL;
 761         int mode;
 762
 763         /* address family check */
 764         sockaddr_size = pfkey_sockaddr_size(x->props.family);
 765         if (!sockaddr_size)
 766                 return ERR_PTR(-EINVAL);
 767
 768         /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
 769            key(AE), (identity(SD),) (sensitivity)> */
 770         size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
 771                 sizeof(struct sadb_lifetime) +
 772                 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
 773                 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
 774                         sizeof(struct sadb_address)*2 +
 775                                 sockaddr_size*2 +
 776                                         sizeof(struct sadb_x_sa2);
 777
 778         if ((xfrm_ctx = x->security)) {
 779                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
 780                 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
 781         }
 782
 783         /* identity & sensitivity */
 784         if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family))
 785                 size += sizeof(struct sadb_address) + sockaddr_size;
 786
 787         if (add_keys) {
 788                 if (x->aalg && x->aalg->alg_key_len) {
 789                         auth_key_size =
 790                                 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
 791                         size += sizeof(struct sadb_key) + auth_key_size;
 792                 }
 793                 if (x->ealg && x->ealg->alg_key_len) {
 794                         encrypt_key_size =
 795                                 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
 796                         size += sizeof(struct sadb_key) + encrypt_key_size;
 797                 }
 798         }
 799         if (x->encap)
 800                 natt = x->encap;
 801
 802         if (natt && natt->encap_type) {
 803                 size += sizeof(struct sadb_x_nat_t_type);
 804                 size += sizeof(struct sadb_x_nat_t_port);
 805                 size += sizeof(struct sadb_x_nat_t_port);
 806         }
 807
 808         skb =  alloc_skb(size + 16, GFP_ATOMIC);
 809         if (skb == NULL)
 810                 return ERR_PTR(-ENOBUFS);
 811
 812         /* call should fill header later */
 813         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
 814         memset(hdr, 0, size);   /* XXX do we need this ? */
 815         hdr->sadb_msg_len = size / sizeof(uint64_t);
 816
 817         /* sa */
 818         sa = (struct sadb_sa *)  skb_put(skb, sizeof(struct sadb_sa));
 819         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
 820         sa->sadb_sa_exttype = SADB_EXT_SA;
 821         sa->sadb_sa_spi = x->id.spi;
 822         sa->sadb_sa_replay = x->props.replay_window;
 823         switch (x->km.state) {
 824         case XFRM_STATE_VALID:
 825                 sa->sadb_sa_state = x->km.dying ?
 826                         SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
 827                 break;
 828         case XFRM_STATE_ACQ:
 829                 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
 830                 break;
 831         default:
 832                 sa->sadb_sa_state = SADB_SASTATE_DEAD;
 833                 break;
 834         }
 835         sa->sadb_sa_auth = 0;
 836         if (x->aalg) {
 837                 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
 838                 sa->sadb_sa_auth = (a && a->pfkey_supported) ?
 839                                         a->desc.sadb_alg_id : 0;
 840         }
 841         sa->sadb_sa_encrypt = 0;
 842         BUG_ON(x->ealg && x->calg);
 843         if (x->ealg) {
 844                 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
 845                 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
 846                                         a->desc.sadb_alg_id : 0;
 847         }
 848         /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
 849         if (x->calg) {
 850                 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
 851                 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
 852                                         a->desc.sadb_alg_id : 0;
 853         }
 854
 855         sa->sadb_sa_flags = 0;
 856         if (x->props.flags & XFRM_STATE_NOECN)
 857                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
 858         if (x->props.flags & XFRM_STATE_DECAP_DSCP)
 859                 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
 860         if (x->props.flags & XFRM_STATE_NOPMTUDISC)
 861                 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
 862
 863         /* hard time */
 864         if (hsc & 2) {
 865                 lifetime = (struct sadb_lifetime *)  skb_put(skb,
 866                                                              sizeof(struct sadb_lifetime));
 867                 lifetime->sadb_lifetime_len =
 868                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 869                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
 870                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.hard_packet_limit);
 871                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
 872                 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
 873                 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
 874         }
 875         /* soft time */
 876         if (hsc & 1) {
 877                 lifetime = (struct sadb_lifetime *)  skb_put(skb,
 878                                                              sizeof(struct sadb_lifetime));
 879                 lifetime->sadb_lifetime_len =
 880                         sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 881                 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
 882                 lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.soft_packet_limit);
 883                 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
 884                 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
 885                 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
 886         }
 887         /* current time */
 888         lifetime = (struct sadb_lifetime *)  skb_put(skb,
 889                                                      sizeof(struct sadb_lifetime));
 890         lifetime->sadb_lifetime_len =
 891                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
 892         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
 893         lifetime->sadb_lifetime_allocations = x->curlft.packets;
 894         lifetime->sadb_lifetime_bytes = x->curlft.bytes;
 895         lifetime->sadb_lifetime_addtime = x->curlft.add_time;
 896         lifetime->sadb_lifetime_usetime = x->curlft.use_time;
 897         /* src address */
 898         addr = (struct sadb_address*) skb_put(skb,
 899                                               sizeof(struct sadb_address)+sockaddr_size);
 900         addr->sadb_address_len =
 901                 (sizeof(struct sadb_address)+sockaddr_size)/
 902                         sizeof(uint64_t);
 903         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
 904         /* "if the ports are non-zero, then the sadb_address_proto field,
 905            normally zero, MUST be filled in with the transport
 906            protocol's number." - RFC2367 */
 907         addr->sadb_address_proto = 0;
 908         addr->sadb_address_reserved = 0;
 909
 910         addr->sadb_address_prefixlen =
 911                 pfkey_sockaddr_fill(&x->props.saddr, 0,
 912                                     (struct sockaddr *) (addr + 1),
 913                                     x->props.family);
 914         if (!addr->sadb_address_prefixlen)
 915                 BUG();
 916
 917         /* dst address */
 918         addr = (struct sadb_address*) skb_put(skb,
 919                                               sizeof(struct sadb_address)+sockaddr_size);
 920         addr->sadb_address_len =
 921                 (sizeof(struct sadb_address)+sockaddr_size)/
 922                         sizeof(uint64_t);
 923         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
 924         addr->sadb_address_proto = 0;
 925         addr->sadb_address_reserved = 0;
 926
 927         addr->sadb_address_prefixlen =
 928                 pfkey_sockaddr_fill(&x->id.daddr, 0,
 929                                     (struct sockaddr *) (addr + 1),
 930                                     x->props.family);
 931         if (!addr->sadb_address_prefixlen)
 932                 BUG();
 933
 934         if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr,
 935                              x->props.family)) {
 936                 addr = (struct sadb_address*) skb_put(skb,
 937                         sizeof(struct sadb_address)+sockaddr_size);
 938                 addr->sadb_address_len =
 939                         (sizeof(struct sadb_address)+sockaddr_size)/
 940                         sizeof(uint64_t);
 941                 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
 942                 addr->sadb_address_proto =
 943                         pfkey_proto_from_xfrm(x->sel.proto);
 944                 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
 945                 addr->sadb_address_reserved = 0;
 946
 947                 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
 948                                     (struct sockaddr *) (addr + 1),
 949                                     x->props.family);
 950         }
 951
 952         /* auth key */
 953         if (add_keys && auth_key_size) {
 954                 key = (struct sadb_key *) skb_put(skb,
 955                                                   sizeof(struct sadb_key)+auth_key_size);
 956                 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
 957                         sizeof(uint64_t);
 958                 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
 959                 key->sadb_key_bits = x->aalg->alg_key_len;
 960                 key->sadb_key_reserved = 0;
 961                 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
 962         }
 963         /* encrypt key */
 964         if (add_keys && encrypt_key_size) {
 965                 key = (struct sadb_key *) skb_put(skb,
 966                                                   sizeof(struct sadb_key)+encrypt_key_size);
 967                 key->sadb_key_len = (sizeof(struct sadb_key) +
 968                                      encrypt_key_size) / sizeof(uint64_t);
 969                 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
 970                 key->sadb_key_bits = x->ealg->alg_key_len;
 971                 key->sadb_key_reserved = 0;
 972                 memcpy(key + 1, x->ealg->alg_key,
 973                        (x->ealg->alg_key_len+7)/8);
 974         }
 975
 976         /* sa */
 977         sa2 = (struct sadb_x_sa2 *)  skb_put(skb, sizeof(struct sadb_x_sa2));
 978         sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
 979         sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
 980         if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
 981                 kfree_skb(skb);
 982                 return ERR_PTR(-EINVAL);
 983         }
 984         sa2->sadb_x_sa2_mode = mode;
 985         sa2->sadb_x_sa2_reserved1 = 0;
 986         sa2->sadb_x_sa2_reserved2 = 0;
 987         sa2->sadb_x_sa2_sequence = 0;
 988         sa2->sadb_x_sa2_reqid = x->props.reqid;
 989
 990         if (natt && natt->encap_type) {
 991                 struct sadb_x_nat_t_type *n_type;
 992                 struct sadb_x_nat_t_port *n_port;
 993
 994                 /* type */
 995                 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
 996                 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
 997                 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
 998                 n_type->sadb_x_nat_t_type_type = natt->encap_type;
 999                 n_type->sadb_x_nat_t_type_reserved[0] = 0;
1000                 n_type->sadb_x_nat_t_type_reserved[1] = 0;
1001                 n_type->sadb_x_nat_t_type_reserved[2] = 0;
1002
1003                 /* source port */
1004                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
1005                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1006                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
1007                 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
1008                 n_port->sadb_x_nat_t_port_reserved = 0;
1009
1010                 /* dest port */
1011                 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
1012                 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1013                 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
1014                 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
1015                 n_port->sadb_x_nat_t_port_reserved = 0;
1016         }
1017
1018         /* security context */
1019         if (xfrm_ctx) {
1020                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
1021                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1022                 sec_ctx->sadb_x_sec_len =
1023                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1024                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1025                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1026                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1027                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1028                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1029                        xfrm_ctx->ctx_len);
1030         }
1031
1032         return skb;
1033 }
1034
1035
1036 static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x)
1037 {
1038         struct sk_buff *skb;
1039
1040         skb = __pfkey_xfrm_state2msg(x, 1, 3);
1041
1042         return skb;
1043 }
1044
1045 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x,
1046                                                           int hsc)
1047 {
1048         return __pfkey_xfrm_state2msg(x, 0, hsc);
1049 }
1050
1051 static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
1052                                                 const struct sadb_msg *hdr,
1053                                                 void * const *ext_hdrs)
1054 {
1055         struct xfrm_state *x;
1056         const struct sadb_lifetime *lifetime;
1057         const struct sadb_sa *sa;
1058         const struct sadb_key *key;
1059         const struct sadb_x_sec_ctx *sec_ctx;
1060         uint16_t proto;
1061         int err;
1062
1063
1064         sa = ext_hdrs[SADB_EXT_SA - 1];
1065         if (!sa ||
1066             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1067                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1068                 return ERR_PTR(-EINVAL);
1069         if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1070             !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1071                 return ERR_PTR(-EINVAL);
1072         if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1073             !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1074                 return ERR_PTR(-EINVAL);
1075         if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1076             !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1077                 return ERR_PTR(-EINVAL);
1078
1079         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1080         if (proto == 0)
1081                 return ERR_PTR(-EINVAL);
1082
1083         /* default error is no buffer space */
1084         err = -ENOBUFS;
1085
1086         /* RFC2367:
1087
1088    Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1089    SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1090    sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1091    Therefore, the sadb_sa_state field of all submitted SAs MUST be
1092    SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1093    not true.
1094
1095            However, KAME setkey always uses SADB_SASTATE_LARVAL.
1096            Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1097          */
1098         if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1099             (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1100              sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1101             sa->sadb_sa_encrypt > SADB_EALG_MAX)
1102                 return ERR_PTR(-EINVAL);
1103         key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1104         if (key != NULL &&
1105             sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1106             ((key->sadb_key_bits+7) / 8 == 0 ||
1107              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1108                 return ERR_PTR(-EINVAL);
1109         key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1110         if (key != NULL &&
1111             sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1112             ((key->sadb_key_bits+7) / 8 == 0 ||
1113              (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1114                 return ERR_PTR(-EINVAL);
1115
1116         x = xfrm_state_alloc(net);
1117         if (x == NULL)
1118                 return ERR_PTR(-ENOBUFS);
1119
1120         x->id.proto = proto;
1121         x->id.spi = sa->sadb_sa_spi;
1122         x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay,
1123                                         (sizeof(x->replay.bitmap) * 8));
1124         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1125                 x->props.flags |= XFRM_STATE_NOECN;
1126         if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1127                 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1128         if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1129                 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1130
1131         lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1];
1132         if (lifetime != NULL) {
1133                 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1134                 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1135                 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1136                 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1137         }
1138         lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1];
1139         if (lifetime != NULL) {
1140                 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1141                 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1142                 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1143                 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1144         }
1145
1146         sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
1147         if (sec_ctx != NULL) {
1148                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
1149
1150                 if (!uctx)
1151                         goto out;
1152
1153                 err = security_xfrm_state_alloc(x, uctx);
1154                 kfree(uctx);
1155
1156                 if (err)
1157                         goto out;
1158         }
1159
1160         key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1161         if (sa->sadb_sa_auth) {
1162                 int keysize = 0;
1163                 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1164                 if (!a || !a->pfkey_supported) {
1165                         err = -ENOSYS;
1166                         goto out;
1167                 }
1168                 if (key)
1169                         keysize = (key->sadb_key_bits + 7) / 8;
1170                 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1171                 if (!x->aalg)
1172                         goto out;
1173                 strcpy(x->aalg->alg_name, a->name);
1174                 x->aalg->alg_key_len = 0;
1175                 if (key) {
1176                         x->aalg->alg_key_len = key->sadb_key_bits;
1177                         memcpy(x->aalg->alg_key, key+1, keysize);
1178                 }
1179                 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1180                 x->props.aalgo = sa->sadb_sa_auth;
1181                 /* x->algo.flags = sa->sadb_sa_flags; */
1182         }
1183         if (sa->sadb_sa_encrypt) {
1184                 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1185                         struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1186                         if (!a || !a->pfkey_supported) {
1187                                 err = -ENOSYS;
1188                                 goto out;
1189                         }
1190                         x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1191                         if (!x->calg)
1192                                 goto out;
1193                         strcpy(x->calg->alg_name, a->name);
1194                         x->props.calgo = sa->sadb_sa_encrypt;
1195                 } else {
1196                         int keysize = 0;
1197                         struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1198                         if (!a || !a->pfkey_supported) {
1199                                 err = -ENOSYS;
1200                                 goto out;
1201                         }
1202                         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1203                         if (key)
1204                                 keysize = (key->sadb_key_bits + 7) / 8;
1205                         x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1206                         if (!x->ealg)
1207                                 goto out;
1208                         strcpy(x->ealg->alg_name, a->name);
1209                         x->ealg->alg_key_len = 0;
1210                         if (key) {
1211                                 x->ealg->alg_key_len = key->sadb_key_bits;
1212                                 memcpy(x->ealg->alg_key, key+1, keysize);
1213                         }
1214                         x->props.ealgo = sa->sadb_sa_encrypt;
1215                         x->geniv = a->uinfo.encr.geniv;
1216                 }
1217         }
1218         /* x->algo.flags = sa->sadb_sa_flags; */
1219
1220         x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1221                                                     &x->props.saddr);
1222         pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1223                                   &x->id.daddr);
1224
1225         if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1226                 const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
1227                 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1228                 if (mode < 0) {
1229                         err = -EINVAL;
1230                         goto out;
1231                 }
1232                 x->props.mode = mode;
1233                 x->props.reqid = sa2->sadb_x_sa2_reqid;
1234         }
1235
1236         if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1237                 const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1238
1239                 /* Nobody uses this, but we try. */
1240                 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1241                 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1242         }
1243
1244         if (!x->sel.family)
1245                 x->sel.family = x->props.family;
1246
1247         if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1248                 const struct sadb_x_nat_t_type* n_type;
1249                 struct xfrm_encap_tmpl *natt;
1250
1251                 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1252                 if (!x->encap)
1253                         goto out;
1254
1255                 natt = x->encap;
1256                 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1257                 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1258
1259                 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1260                         const struct sadb_x_nat_t_port *n_port =
1261                                 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1262                         natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1263                 }
1264                 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1265                         const struct sadb_x_nat_t_port *n_port =
1266                                 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1267                         natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1268                 }
1269                 memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
1270         }
1271
1272         err = xfrm_init_state(x);
1273         if (err)
1274                 goto out;
1275
1276         x->km.seq = hdr->sadb_msg_seq;
1277         return x;
1278
1279 out:
1280         x->km.state = XFRM_STATE_DEAD;
1281         xfrm_state_put(x);
1282         return ERR_PTR(err);
1283 }
1284
1285 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1286 {
1287         return -EOPNOTSUPP;
1288 }
1289
1290 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1291 {
1292         struct net *net = sock_net(sk);
1293         struct sk_buff *resp_skb;
1294         struct sadb_x_sa2 *sa2;
1295         struct sadb_address *saddr, *daddr;
1296         struct sadb_msg *out_hdr;
1297         struct sadb_spirange *range;
1298         struct xfrm_state *x = NULL;
1299         int mode;
1300         int err;
1301         u32 min_spi, max_spi;
1302         u32 reqid;
1303         u8 proto;
1304         unsigned short family;
1305         xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1306
1307         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1308                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1309                 return -EINVAL;
1310
1311         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1312         if (proto == 0)
1313                 return -EINVAL;
1314
1315         if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1316                 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1317                 if (mode < 0)
1318                         return -EINVAL;
1319                 reqid = sa2->sadb_x_sa2_reqid;
1320         } else {
1321                 mode = 0;
1322                 reqid = 0;
1323         }
1324
1325         saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1326         daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1327
1328         family = ((struct sockaddr *)(saddr + 1))->sa_family;
1329         switch (family) {
1330         case AF_INET:
1331                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1332                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1333                 break;
1334 #if IS_ENABLED(CONFIG_IPV6)
1335         case AF_INET6:
1336                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1337                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1338                 break;
1339 #endif
1340         }
1341
1342         if (hdr->sadb_msg_seq) {
1343                 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1344                 if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) {
1345                         xfrm_state_put(x);
1346                         x = NULL;
1347                 }
1348         }
1349
1350         if (!x)
1351                 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family);
1352
1353         if (x == NULL)
1354                 return -ENOENT;
1355
1356         min_spi = 0x100;
1357         max_spi = 0x0fffffff;
1358
1359         range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1360         if (range) {
1361                 min_spi = range->sadb_spirange_min;
1362                 max_spi = range->sadb_spirange_max;
1363         }
1364
1365         err = verify_spi_info(x->id.proto, min_spi, max_spi);
1366         if (err) {
1367                 xfrm_state_put(x);
1368                 return err;
1369         }
1370
1371         err = xfrm_alloc_spi(x, min_spi, max_spi);
1372         resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1373
1374         if (IS_ERR(resp_skb)) {
1375                 xfrm_state_put(x);
1376                 return  PTR_ERR(resp_skb);
1377         }
1378
1379         out_hdr = (struct sadb_msg *) resp_skb->data;
1380         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1381         out_hdr->sadb_msg_type = SADB_GETSPI;
1382         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1383         out_hdr->sadb_msg_errno = 0;
1384         out_hdr->sadb_msg_reserved = 0;
1385         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1386         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1387
1388         xfrm_state_put(x);
1389
1390         pfkey_broadcast(resp_skb, BROADCAST_ONE, sk, net);
1391
1392         return 0;
1393 }
1394
1395 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1396 {
1397         struct net *net = sock_net(sk);
1398         struct xfrm_state *x;
1399
1400         if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1401                 return -EOPNOTSUPP;
1402
1403         if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1404                 return 0;
1405
1406         x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1407         if (x == NULL)
1408                 return 0;
1409
1410         spin_lock_bh(&x->lock);
1411         if (x->km.state == XFRM_STATE_ACQ)
1412                 x->km.state = XFRM_STATE_ERROR;
1413
1414         spin_unlock_bh(&x->lock);
1415         xfrm_state_put(x);
1416         return 0;
1417 }
1418
1419 static inline int event2poltype(int event)
1420 {
1421         switch (event) {
1422         case XFRM_MSG_DELPOLICY:
1423                 return SADB_X_SPDDELETE;
1424         case XFRM_MSG_NEWPOLICY:
1425                 return SADB_X_SPDADD;
1426         case XFRM_MSG_UPDPOLICY:
1427                 return SADB_X_SPDUPDATE;
1428         case XFRM_MSG_POLEXPIRE:
1429         //      return SADB_X_SPDEXPIRE;
1430         default:
1431                 pr_err("pfkey: Unknown policy event %d\n", event);
1432                 break;
1433         }
1434
1435         return 0;
1436 }
1437
1438 static inline int event2keytype(int event)
1439 {
1440         switch (event) {
1441         case XFRM_MSG_DELSA:
1442                 return SADB_DELETE;
1443         case XFRM_MSG_NEWSA:
1444                 return SADB_ADD;
1445         case XFRM_MSG_UPDSA:
1446                 return SADB_UPDATE;
1447         case XFRM_MSG_EXPIRE:
1448                 return SADB_EXPIRE;
1449         default:
1450                 pr_err("pfkey: Unknown SA event %d\n", event);
1451                 break;
1452         }
1453
1454         return 0;
1455 }
1456
1457 /* ADD/UPD/DEL */
1458 static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
1459 {
1460         struct sk_buff *skb;
1461         struct sadb_msg *hdr;
1462
1463         skb = pfkey_xfrm_state2msg(x);
1464
1465         if (IS_ERR(skb))
1466                 return PTR_ERR(skb);
1467
1468         hdr = (struct sadb_msg *) skb->data;
1469         hdr->sadb_msg_version = PF_KEY_V2;
1470         hdr->sadb_msg_type = event2keytype(c->event);
1471         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1472         hdr->sadb_msg_errno = 0;
1473         hdr->sadb_msg_reserved = 0;
1474         hdr->sadb_msg_seq = c->seq;
1475         hdr->sadb_msg_pid = c->portid;
1476
1477         pfkey_broadcast(skb, BROADCAST_ALL, NULL, xs_net(x));
1478
1479         return 0;
1480 }
1481
1482 static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1483 {
1484         struct net *net = sock_net(sk);
1485         struct xfrm_state *x;
1486         int err;
1487         struct km_event c;
1488
1489         x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1490         if (IS_ERR(x))
1491                 return PTR_ERR(x);
1492
1493         xfrm_state_hold(x);
1494         if (hdr->sadb_msg_type == SADB_ADD)
1495                 err = xfrm_state_add(x);
1496         else
1497                 err = xfrm_state_update(x);
1498
1499         xfrm_audit_state_add(x, err ? 0 : 1, true);
1500
1501         if (err < 0) {
1502                 x->km.state = XFRM_STATE_DEAD;
1503                 __xfrm_state_put(x);
1504                 goto out;
1505         }
1506
1507         if (hdr->sadb_msg_type == SADB_ADD)
1508                 c.event = XFRM_MSG_NEWSA;
1509         else
1510                 c.event = XFRM_MSG_UPDSA;
1511         c.seq = hdr->sadb_msg_seq;
1512         c.portid = hdr->sadb_msg_pid;
1513         km_state_notify(x, &c);
1514 out:
1515         xfrm_state_put(x);
1516         return err;
1517 }
1518
1519 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1520 {
1521         struct net *net = sock_net(sk);
1522         struct xfrm_state *x;
1523         struct km_event c;
1524         int err;
1525
1526         if (!ext_hdrs[SADB_EXT_SA-1] ||
1527             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1528                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1529                 return -EINVAL;
1530
1531         x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1532         if (x == NULL)
1533                 return -ESRCH;
1534
1535         if ((err = security_xfrm_state_delete(x)))
1536                 goto out;
1537
1538         if (xfrm_state_kern(x)) {
1539                 err = -EPERM;
1540                 goto out;
1541         }
1542
1543         err = xfrm_state_delete(x);
1544
1545         if (err < 0)
1546                 goto out;
1547
1548         c.seq = hdr->sadb_msg_seq;
1549         c.portid = hdr->sadb_msg_pid;
1550         c.event = XFRM_MSG_DELSA;
1551         km_state_notify(x, &c);
1552 out:
1553         xfrm_audit_state_delete(x, err ? 0 : 1, true);
1554         xfrm_state_put(x);
1555
1556         return err;
1557 }
1558
1559 static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1560 {
1561         struct net *net = sock_net(sk);
1562         __u8 proto;
1563         struct sk_buff *out_skb;
1564         struct sadb_msg *out_hdr;
1565         struct xfrm_state *x;
1566
1567         if (!ext_hdrs[SADB_EXT_SA-1] ||
1568             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1569                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1570                 return -EINVAL;
1571
1572         x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1573         if (x == NULL)
1574                 return -ESRCH;
1575
1576         out_skb = pfkey_xfrm_state2msg(x);
1577         proto = x->id.proto;
1578         xfrm_state_put(x);
1579         if (IS_ERR(out_skb))
1580                 return  PTR_ERR(out_skb);
1581
1582         out_hdr = (struct sadb_msg *) out_skb->data;
1583         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1584         out_hdr->sadb_msg_type = SADB_GET;
1585         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1586         out_hdr->sadb_msg_errno = 0;
1587         out_hdr->sadb_msg_reserved = 0;
1588         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1589         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1590         pfkey_broadcast(out_skb, BROADCAST_ONE, sk, sock_net(sk));
1591
1592         return 0;
1593 }
1594
1595 static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
1596                                               gfp_t allocation)
1597 {
1598         struct sk_buff *skb;
1599         struct sadb_msg *hdr;
1600         int len, auth_len, enc_len, i;
1601
1602         auth_len = xfrm_count_pfkey_auth_supported();
1603         if (auth_len) {
1604                 auth_len *= sizeof(struct sadb_alg);
1605                 auth_len += sizeof(struct sadb_supported);
1606         }
1607
1608         enc_len = xfrm_count_pfkey_enc_supported();
1609         if (enc_len) {
1610                 enc_len *= sizeof(struct sadb_alg);
1611                 enc_len += sizeof(struct sadb_supported);
1612         }
1613
1614         len = enc_len + auth_len + sizeof(struct sadb_msg);
1615
1616         skb = alloc_skb(len + 16, allocation);
1617         if (!skb)
1618                 goto out_put_algs;
1619
1620         hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1621         pfkey_hdr_dup(hdr, orig);
1622         hdr->sadb_msg_errno = 0;
1623         hdr->sadb_msg_len = len / sizeof(uint64_t);
1624
1625         if (auth_len) {
1626                 struct sadb_supported *sp;
1627                 struct sadb_alg *ap;
1628
1629                 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1630                 ap = (struct sadb_alg *) (sp + 1);
1631
1632                 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1633                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1634
1635                 for (i = 0; ; i++) {
1636                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1637                         if (!aalg)
1638                                 break;
1639                         if (!aalg->pfkey_supported)
1640                                 continue;
1641                         if (aalg->available)
1642                                 *ap++ = aalg->desc;
1643                 }
1644         }
1645
1646         if (enc_len) {
1647                 struct sadb_supported *sp;
1648                 struct sadb_alg *ap;
1649
1650                 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1651                 ap = (struct sadb_alg *) (sp + 1);
1652
1653                 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1654                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1655
1656                 for (i = 0; ; i++) {
1657                         struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1658                         if (!ealg)
1659                                 break;
1660                         if (!ealg->pfkey_supported)
1661                                 continue;
1662                         if (ealg->available)
1663                                 *ap++ = ealg->desc;
1664                 }
1665         }
1666
1667 out_put_algs:
1668         return skb;
1669 }
1670
1671 static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1672 {
1673         struct pfkey_sock *pfk = pfkey_sk(sk);
1674         struct sk_buff *supp_skb;
1675
1676         if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1677                 return -EINVAL;
1678
1679         if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1680                 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1681                         return -EEXIST;
1682                 pfk->registered |= (1<<hdr->sadb_msg_satype);
1683         }
1684
1685         xfrm_probe_algs();
1686
1687         supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1688         if (!supp_skb) {
1689                 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1690                         pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1691
1692                 return -ENOBUFS;
1693         }
1694
1695         pfkey_broadcast(supp_skb, BROADCAST_REGISTERED, sk, sock_net(sk));
1696
1697         return 0;
1698 }
1699
1700 static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
1701 {
1702         struct sk_buff *skb;
1703         struct sadb_msg *hdr;
1704
1705         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1706         if (!skb)
1707                 return -ENOBUFS;
1708
1709         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1710         memcpy(hdr, ihdr, sizeof(struct sadb_msg));
1711         hdr->sadb_msg_errno = (uint8_t) 0;
1712         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1713
1714         return pfkey_broadcast(skb, BROADCAST_ONE, sk, sock_net(sk));
1715 }
1716
1717 static int key_notify_sa_flush(const struct km_event *c)
1718 {
1719         struct sk_buff *skb;
1720         struct sadb_msg *hdr;
1721
1722         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1723         if (!skb)
1724                 return -ENOBUFS;
1725         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1726         hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1727         hdr->sadb_msg_type = SADB_FLUSH;
1728         hdr->sadb_msg_seq = c->seq;
1729         hdr->sadb_msg_pid = c->portid;
1730         hdr->sadb_msg_version = PF_KEY_V2;
1731         hdr->sadb_msg_errno = (uint8_t) 0;
1732         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1733         hdr->sadb_msg_reserved = 0;
1734
1735         pfkey_broadcast(skb, BROADCAST_ALL, NULL, c->net);
1736
1737         return 0;
1738 }
1739
1740 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1741 {
1742         struct net *net = sock_net(sk);
1743         unsigned int proto;
1744         struct km_event c;
1745         int err, err2;
1746
1747         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1748         if (proto == 0)
1749                 return -EINVAL;
1750
1751         err = xfrm_state_flush(net, proto, true);
1752         err2 = unicast_flush_resp(sk, hdr);
1753         if (err || err2) {
1754                 if (err == -ESRCH) /* empty table - go quietly */
1755                         err = 0;
1756                 return err ? err : err2;
1757         }
1758
1759         c.data.proto = proto;
1760         c.seq = hdr->sadb_msg_seq;
1761         c.portid = hdr->sadb_msg_pid;
1762         c.event = XFRM_MSG_FLUSHSA;
1763         c.net = net;
1764         km_state_notify(NULL, &c);
1765
1766         return 0;
1767 }
1768
1769 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1770 {
1771         struct pfkey_sock *pfk = ptr;
1772         struct sk_buff *out_skb;
1773         struct sadb_msg *out_hdr;
1774
1775         if (!pfkey_can_dump(&pfk->sk))
1776                 return -ENOBUFS;
1777
1778         out_skb = pfkey_xfrm_state2msg(x);
1779         if (IS_ERR(out_skb))
1780                 return PTR_ERR(out_skb);
1781
1782         out_hdr = (struct sadb_msg *) out_skb->data;
1783         out_hdr->sadb_msg_version = pfk->dump.msg_version;
1784         out_hdr->sadb_msg_type = SADB_DUMP;
1785         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1786         out_hdr->sadb_msg_errno = 0;
1787         out_hdr->sadb_msg_reserved = 0;
1788         out_hdr->sadb_msg_seq = count + 1;
1789         out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
1790
1791         if (pfk->dump.skb)
1792                 pfkey_broadcast(pfk->dump.skb, BROADCAST_ONE,
1793                                 &pfk->sk, sock_net(&pfk->sk));
1794         pfk->dump.skb = out_skb;
1795
1796         return 0;
1797 }
1798
1799 static int pfkey_dump_sa(struct pfkey_sock *pfk)
1800 {
1801         struct net *net = sock_net(&pfk->sk);
1802         return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1803 }
1804
1805 static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1806 {
1807         struct net *net = sock_net(&pfk->sk);
1808
1809         xfrm_state_walk_done(&pfk->dump.u.state, net);
1810 }
1811
1812 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1813 {
1814         u8 proto;
1815         struct xfrm_address_filter *filter = NULL;
1816         struct pfkey_sock *pfk = pfkey_sk(sk);
1817
1818         mutex_lock(&pfk->dump_lock);
1819         if (pfk->dump.dump != NULL) {
1820                 mutex_unlock(&pfk->dump_lock);
1821                 return -EBUSY;
1822         }
1823
1824         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1825         if (proto == 0) {
1826                 mutex_unlock(&pfk->dump_lock);
1827                 return -EINVAL;
1828         }
1829
1830         if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
1831                 struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
1832
1833                 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
1834                 if (filter == NULL) {
1835                         mutex_unlock(&pfk->dump_lock);
1836                         return -ENOMEM;
1837                 }
1838
1839                 memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr,
1840                        sizeof(xfrm_address_t));
1841                 memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr,
1842                        sizeof(xfrm_address_t));
1843                 filter->family = xfilter->sadb_x_filter_family;
1844                 filter->splen = xfilter->sadb_x_filter_splen;
1845                 filter->dplen = xfilter->sadb_x_filter_dplen;
1846         }
1847
1848         pfk->dump.msg_version = hdr->sadb_msg_version;
1849         pfk->dump.msg_portid = hdr->sadb_msg_pid;
1850         pfk->dump.dump = pfkey_dump_sa;
1851         pfk->dump.done = pfkey_dump_sa_done;
1852         xfrm_state_walk_init(&pfk->dump.u.state, proto, filter);
1853         mutex_unlock(&pfk->dump_lock);
1854
1855         return pfkey_do_dump(pfk);
1856 }
1857
1858 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1859 {
1860         struct pfkey_sock *pfk = pfkey_sk(sk);
1861         int satype = hdr->sadb_msg_satype;
1862         bool reset_errno = false;
1863
1864         if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1865                 reset_errno = true;
1866                 if (satype != 0 && satype != 1)
1867                         return -EINVAL;
1868                 pfk->promisc = satype;
1869         }
1870         if (reset_errno && skb_cloned(skb))
1871                 skb = skb_copy(skb, GFP_KERNEL);
1872         else
1873                 skb = skb_clone(skb, GFP_KERNEL);
1874
1875         if (reset_errno && skb) {
1876                 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1877                 new_hdr->sadb_msg_errno = 0;
1878         }
1879
1880         pfkey_broadcast(skb, BROADCAST_ALL, NULL, sock_net(sk));
1881         return 0;
1882 }
1883
1884 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1885 {
1886         int i;
1887         u32 reqid = *(u32*)ptr;
1888
1889         for (i=0; i<xp->xfrm_nr; i++) {
1890                 if (xp->xfrm_vec[i].reqid == reqid)
1891                         return -EEXIST;
1892         }
1893         return 0;
1894 }
1895
1896 static u32 gen_reqid(struct net *net)
1897 {
1898         struct xfrm_policy_walk walk;
1899         u32 start;
1900         int rc;
1901         static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1902
1903         start = reqid;
1904         do {
1905                 ++reqid;
1906                 if (reqid == 0)
1907                         reqid = IPSEC_MANUAL_REQID_MAX+1;
1908                 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1909                 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1910                 xfrm_policy_walk_done(&walk, net);
1911                 if (rc != -EEXIST)
1912                         return reqid;
1913         } while (reqid != start);
1914         return 0;
1915 }
1916
1917 static int
1918 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1919 {
1920         struct net *net = xp_net(xp);
1921         struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1922         int mode;
1923
1924         if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1925                 return -ELOOP;
1926
1927         if (rq->sadb_x_ipsecrequest_mode == 0)
1928                 return -EINVAL;
1929
1930         t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1931         if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1932                 return -EINVAL;
1933         t->mode = mode;
1934         if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1935                 t->optional = 1;
1936         else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1937                 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1938                 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1939                         t->reqid = 0;
1940                 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1941                         return -ENOBUFS;
1942         }
1943
1944         /* addresses present only in tunnel mode */
1945         if (t->mode == XFRM_MODE_TUNNEL) {
1946                 int err;
1947
1948                 err = parse_sockaddr_pair(
1949                         (struct sockaddr *)(rq + 1),
1950                         rq->sadb_x_ipsecrequest_len - sizeof(*rq),
1951                         &t->saddr, &t->id.daddr, &t->encap_family);
1952                 if (err)
1953                         return err;
1954         } else
1955                 t->encap_family = xp->family;
1956
1957         /* No way to set this via kame pfkey */
1958         t->allalgs = 1;
1959         xp->xfrm_nr++;
1960         return 0;
1961 }
1962
1963 static int
1964 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1965 {
1966         int err;
1967         int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1968         struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1969
1970         if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
1971                 return -EINVAL;
1972
1973         while (len >= sizeof(*rq)) {
1974                 if (len < rq->sadb_x_ipsecrequest_len ||
1975                     rq->sadb_x_ipsecrequest_len < sizeof(*rq))
1976                         return -EINVAL;
1977
1978                 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1979                         return err;
1980                 len -= rq->sadb_x_ipsecrequest_len;
1981                 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1982         }
1983         return 0;
1984 }
1985
1986 static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
1987 {
1988   struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1989
1990         if (xfrm_ctx) {
1991                 int len = sizeof(struct sadb_x_sec_ctx);
1992                 len += xfrm_ctx->ctx_len;
1993                 return PFKEY_ALIGN8(len);
1994         }
1995         return 0;
1996 }
1997
1998 static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
1999 {
2000         const struct xfrm_tmpl *t;
2001         int sockaddr_size = pfkey_sockaddr_size(xp->family);
2002         int socklen = 0;
2003         int i;
2004
2005         for (i=0; i<xp->xfrm_nr; i++) {
2006                 t = xp->xfrm_vec + i;
2007                 socklen += pfkey_sockaddr_len(t->encap_family);
2008         }
2009
2010         return sizeof(struct sadb_msg) +
2011                 (sizeof(struct sadb_lifetime) * 3) +
2012                 (sizeof(struct sadb_address) * 2) +
2013                 (sockaddr_size * 2) +
2014                 sizeof(struct sadb_x_policy) +
2015                 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
2016                 (socklen * 2) +
2017                 pfkey_xfrm_policy2sec_ctx_size(xp);
2018 }
2019
2020 static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
2021 {
2022         struct sk_buff *skb;
2023         int size;
2024
2025         size = pfkey_xfrm_policy2msg_size(xp);
2026
2027         skb =  alloc_skb(size + 16, GFP_ATOMIC);
2028         if (skb == NULL)
2029                 return ERR_PTR(-ENOBUFS);
2030
2031         return skb;
2032 }
2033
2034 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
2035 {
2036         struct sadb_msg *hdr;
2037         struct sadb_address *addr;
2038         struct sadb_lifetime *lifetime;
2039         struct sadb_x_policy *pol;
2040         struct sadb_x_sec_ctx *sec_ctx;
2041         struct xfrm_sec_ctx *xfrm_ctx;
2042         int i;
2043         int size;
2044         int sockaddr_size = pfkey_sockaddr_size(xp->family);
2045         int socklen = pfkey_sockaddr_len(xp->family);
2046
2047         size = pfkey_xfrm_policy2msg_size(xp);
2048
2049         /* call should fill header later */
2050         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2051         memset(hdr, 0, size);   /* XXX do we need this ? */
2052
2053         /* src address */
2054         addr = (struct sadb_address*) skb_put(skb,
2055                                               sizeof(struct sadb_address)+sockaddr_size);
2056         addr->sadb_address_len =
2057                 (sizeof(struct sadb_address)+sockaddr_size)/
2058                         sizeof(uint64_t);
2059         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2060         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2061         addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2062         addr->sadb_address_reserved = 0;
2063         if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2064                                  xp->selector.sport,
2065                                  (struct sockaddr *) (addr + 1),
2066                                  xp->family))
2067                 BUG();
2068
2069         /* dst address */
2070         addr = (struct sadb_address*) skb_put(skb,
2071                                               sizeof(struct sadb_address)+sockaddr_size);
2072         addr->sadb_address_len =
2073                 (sizeof(struct sadb_address)+sockaddr_size)/
2074                         sizeof(uint64_t);
2075         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2076         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2077         addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2078         addr->sadb_address_reserved = 0;
2079
2080         pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2081                             (struct sockaddr *) (addr + 1),
2082                             xp->family);
2083
2084         /* hard time */
2085         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2086                                                      sizeof(struct sadb_lifetime));
2087         lifetime->sadb_lifetime_len =
2088                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2089         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2090         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.hard_packet_limit);
2091         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2092         lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2093         lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2094         /* soft time */
2095         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2096                                                      sizeof(struct sadb_lifetime));
2097         lifetime->sadb_lifetime_len =
2098                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2099         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2100         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.soft_packet_limit);
2101         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2102         lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2103         lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2104         /* current time */
2105         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2106                                                      sizeof(struct sadb_lifetime));
2107         lifetime->sadb_lifetime_len =
2108                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2109         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2110         lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2111         lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2112         lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2113         lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2114
2115         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
2116         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2117         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2118         pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2119         if (xp->action == XFRM_POLICY_ALLOW) {
2120                 if (xp->xfrm_nr)
2121                         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2122                 else
2123                         pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2124         }
2125         pol->sadb_x_policy_dir = dir+1;
2126         pol->sadb_x_policy_reserved = 0;
2127         pol->sadb_x_policy_id = xp->index;
2128         pol->sadb_x_policy_priority = xp->priority;
2129
2130         for (i=0; i<xp->xfrm_nr; i++) {
2131                 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
2132                 struct sadb_x_ipsecrequest *rq;
2133                 int req_size;
2134                 int mode;
2135
2136                 req_size = sizeof(struct sadb_x_ipsecrequest);
2137                 if (t->mode == XFRM_MODE_TUNNEL) {
2138                         socklen = pfkey_sockaddr_len(t->encap_family);
2139                         req_size += socklen * 2;
2140                 } else {
2141                         size -= 2*socklen;
2142                 }
2143                 rq = (void*)skb_put(skb, req_size);
2144                 pol->sadb_x_policy_len += req_size/8;
2145                 memset(rq, 0, sizeof(*rq));
2146                 rq->sadb_x_ipsecrequest_len = req_size;
2147                 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2148                 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2149                         return -EINVAL;
2150                 rq->sadb_x_ipsecrequest_mode = mode;
2151                 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2152                 if (t->reqid)
2153                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2154                 if (t->optional)
2155                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2156                 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2157
2158                 if (t->mode == XFRM_MODE_TUNNEL) {
2159                         u8 *sa = (void *)(rq + 1);
2160                         pfkey_sockaddr_fill(&t->saddr, 0,
2161                                             (struct sockaddr *)sa,
2162                                             t->encap_family);
2163                         pfkey_sockaddr_fill(&t->id.daddr, 0,
2164                                             (struct sockaddr *) (sa + socklen),
2165                                             t->encap_family);
2166                 }
2167         }
2168
2169         /* security context */
2170         if ((xfrm_ctx = xp->security)) {
2171                 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2172
2173                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2174                 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2175                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2176                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2177                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2178                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2179                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2180                        xfrm_ctx->ctx_len);
2181         }
2182
2183         hdr->sadb_msg_len = size / sizeof(uint64_t);
2184         hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2185
2186         return 0;
2187 }
2188
2189 static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2190 {
2191         struct sk_buff *out_skb;
2192         struct sadb_msg *out_hdr;
2193         int err;
2194
2195         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2196         if (IS_ERR(out_skb))
2197                 return PTR_ERR(out_skb);
2198
2199         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2200         if (err < 0)
2201                 return err;
2202
2203         out_hdr = (struct sadb_msg *) out_skb->data;
2204         out_hdr->sadb_msg_version = PF_KEY_V2;
2205
2206         if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2207                 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2208         else
2209                 out_hdr->sadb_msg_type = event2poltype(c->event);
2210         out_hdr->sadb_msg_errno = 0;
2211         out_hdr->sadb_msg_seq = c->seq;
2212         out_hdr->sadb_msg_pid = c->portid;
2213         pfkey_broadcast(out_skb, BROADCAST_ALL, NULL, xp_net(xp));
2214         return 0;
2215
2216 }
2217
2218 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2219 {
2220         struct net *net = sock_net(sk);
2221         int err = 0;
2222         struct sadb_lifetime *lifetime;
2223         struct sadb_address *sa;
2224         struct sadb_x_policy *pol;
2225         struct xfrm_policy *xp;
2226         struct km_event c;
2227         struct sadb_x_sec_ctx *sec_ctx;
2228
2229         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2230                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2231             !ext_hdrs[SADB_X_EXT_POLICY-1])
2232                 return -EINVAL;
2233
2234         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2235         if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2236                 return -EINVAL;
2237         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2238                 return -EINVAL;
2239
2240         xp = xfrm_policy_alloc(net, GFP_KERNEL);
2241         if (xp == NULL)
2242                 return -ENOBUFS;
2243
2244         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2245                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2246         xp->priority = pol->sadb_x_policy_priority;
2247
2248         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2249         xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2250         xp->selector.family = xp->family;
2251         xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2252         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2253         xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2254         if (xp->selector.sport)
2255                 xp->selector.sport_mask = htons(0xffff);
2256
2257         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2258         pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2259         xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2260
2261         /* Amusing, we set this twice.  KAME apps appear to set same value
2262          * in both addresses.
2263          */
2264         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2265
2266         xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2267         if (xp->selector.dport)
2268                 xp->selector.dport_mask = htons(0xffff);
2269
2270         sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2271         if (sec_ctx != NULL) {
2272                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2273
2274                 if (!uctx) {
2275                         err = -ENOBUFS;
2276                         goto out;
2277                 }
2278
2279                 err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL);
2280                 kfree(uctx);
2281
2282                 if (err)
2283                         goto out;
2284         }
2285
2286         xp->lft.soft_byte_limit = XFRM_INF;
2287         xp->lft.hard_byte_limit = XFRM_INF;
2288         xp->lft.soft_packet_limit = XFRM_INF;
2289         xp->lft.hard_packet_limit = XFRM_INF;
2290         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2291                 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2292                 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2293                 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2294                 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2295         }
2296         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2297                 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2298                 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2299                 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2300                 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2301         }
2302         xp->xfrm_nr = 0;
2303         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2304             (err = parse_ipsecrequests(xp, pol)) < 0)
2305                 goto out;
2306
2307         err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2308                                  hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2309
2310         xfrm_audit_policy_add(xp, err ? 0 : 1, true);
2311
2312         if (err)
2313                 goto out;
2314
2315         if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2316                 c.event = XFRM_MSG_UPDPOLICY;
2317         else
2318                 c.event = XFRM_MSG_NEWPOLICY;
2319
2320         c.seq = hdr->sadb_msg_seq;
2321         c.portid = hdr->sadb_msg_pid;
2322
2323         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2324         xfrm_pol_put(xp);
2325         return 0;
2326
2327 out:
2328         xp->walk.dead = 1;
2329         xfrm_policy_destroy(xp);
2330         return err;
2331 }
2332
2333 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2334 {
2335         struct net *net = sock_net(sk);
2336         int err;
2337         struct sadb_address *sa;
2338         struct sadb_x_policy *pol;
2339         struct xfrm_policy *xp;
2340         struct xfrm_selector sel;
2341         struct km_event c;
2342         struct sadb_x_sec_ctx *sec_ctx;
2343         struct xfrm_sec_ctx *pol_ctx = NULL;
2344
2345         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2346                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2347             !ext_hdrs[SADB_X_EXT_POLICY-1])
2348                 return -EINVAL;
2349
2350         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2351         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2352                 return -EINVAL;
2353
2354         memset(&sel, 0, sizeof(sel));
2355
2356         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2357         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2358         sel.prefixlen_s = sa->sadb_address_prefixlen;
2359         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2360         sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2361         if (sel.sport)
2362                 sel.sport_mask = htons(0xffff);
2363
2364         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2365         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2366         sel.prefixlen_d = sa->sadb_address_prefixlen;
2367         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2368         sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2369         if (sel.dport)
2370                 sel.dport_mask = htons(0xffff);
2371
2372         sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2373         if (sec_ctx != NULL) {
2374                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2375
2376                 if (!uctx)
2377                         return -ENOMEM;
2378
2379                 err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL);
2380                 kfree(uctx);
2381                 if (err)
2382                         return err;
2383         }
2384
2385         xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2386                                    pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2387                                    1, &err);
2388         security_xfrm_policy_free(pol_ctx);
2389         if (xp == NULL)
2390                 return -ENOENT;
2391
2392         xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2393
2394         if (err)
2395                 goto out;
2396
2397         c.seq = hdr->sadb_msg_seq;
2398         c.portid = hdr->sadb_msg_pid;
2399         c.data.byid = 0;
2400         c.event = XFRM_MSG_DELPOLICY;
2401         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2402
2403 out:
2404         xfrm_pol_put(xp);
2405         if (err == 0)
2406                 xfrm_garbage_collect(net);
2407         return err;
2408 }
2409
2410 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
2411 {
2412         int err;
2413         struct sk_buff *out_skb;
2414         struct sadb_msg *out_hdr;
2415         err = 0;
2416
2417         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2418         if (IS_ERR(out_skb)) {
2419                 err =  PTR_ERR(out_skb);
2420                 goto out;
2421         }
2422         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2423         if (err < 0)
2424                 goto out;
2425
2426         out_hdr = (struct sadb_msg *) out_skb->data;
2427         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2428         out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2429         out_hdr->sadb_msg_satype = 0;
2430         out_hdr->sadb_msg_errno = 0;
2431         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2432         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2433         pfkey_broadcast(out_skb, BROADCAST_ONE, sk, xp_net(xp));
2434         err = 0;
2435
2436 out:
2437         return err;
2438 }
2439
2440 static int pfkey_sockaddr_pair_size(sa_family_t family)
2441 {
2442         return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2443 }
2444
2445 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2446                                xfrm_address_t *saddr, xfrm_address_t *daddr,
2447                                u16 *family)
2448 {
2449         int af, socklen;
2450
2451         if (ext_len < 2 || ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2452                 return -EINVAL;
2453
2454         af = pfkey_sockaddr_extract(sa, saddr);
2455         if (!af)
2456                 return -EINVAL;
2457
2458         socklen = pfkey_sockaddr_len(af);
2459         if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2460                                    daddr) != af)
2461                 return -EINVAL;
2462
2463         *family = af;
2464         return 0;
2465 }
2466
2467 #ifdef CONFIG_NET_KEY_MIGRATE
2468 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2469                                     struct xfrm_migrate *m)
2470 {
2471         int err;
2472         struct sadb_x_ipsecrequest *rq2;
2473         int mode;
2474
2475         if (len < sizeof(*rq1) ||
2476             len < rq1->sadb_x_ipsecrequest_len ||
2477             rq1->sadb_x_ipsecrequest_len < sizeof(*rq1))
2478                 return -EINVAL;
2479
2480         /* old endoints */
2481         err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2482                                   rq1->sadb_x_ipsecrequest_len - sizeof(*rq1),
2483                                   &m->old_saddr, &m->old_daddr,
2484                                   &m->old_family);
2485         if (err)
2486                 return err;
2487
2488         rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2489         len -= rq1->sadb_x_ipsecrequest_len;
2490
2491         if (len <= sizeof(*rq2) ||
2492             len < rq2->sadb_x_ipsecrequest_len ||
2493             rq2->sadb_x_ipsecrequest_len < sizeof(*rq2))
2494                 return -EINVAL;
2495
2496         /* new endpoints */
2497         err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2498                                   rq2->sadb_x_ipsecrequest_len - sizeof(*rq2),
2499                                   &m->new_saddr, &m->new_daddr,
2500                                   &m->new_family);
2501         if (err)
2502                 return err;
2503
2504         if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2505             rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2506             rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2507                 return -EINVAL;
2508
2509         m->proto = rq1->sadb_x_ipsecrequest_proto;
2510         if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2511                 return -EINVAL;
2512         m->mode = mode;
2513         m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2514
2515         return ((int)(rq1->sadb_x_ipsecrequest_len +
2516                       rq2->sadb_x_ipsecrequest_len));
2517 }
2518
2519 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2520                          const struct sadb_msg *hdr, void * const *ext_hdrs)
2521 {
2522         int i, len, ret, err = -EINVAL;
2523         u8 dir;
2524         struct sadb_address *sa;
2525         struct sadb_x_kmaddress *kma;
2526         struct sadb_x_policy *pol;
2527         struct sadb_x_ipsecrequest *rq;
2528         struct xfrm_selector sel;
2529         struct xfrm_migrate m[XFRM_MAX_DEPTH];
2530         struct xfrm_kmaddress k;
2531         struct net *net = sock_net(sk);
2532
2533         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2534                                      ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2535             !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2536                 err = -EINVAL;
2537                 goto out;
2538         }
2539
2540         kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2541         pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2542
2543         if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2544                 err = -EINVAL;
2545                 goto out;
2546         }
2547
2548         if (kma) {
2549                 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2550                 k.reserved = kma->sadb_x_kmaddress_reserved;
2551                 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2552                                           8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2553                                           &k.local, &k.remote, &k.family);
2554                 if (ret < 0) {
2555                         err = ret;
2556                         goto out;
2557                 }
2558         }
2559
2560         dir = pol->sadb_x_policy_dir - 1;
2561         memset(&sel, 0, sizeof(sel));
2562
2563         /* set source address info of selector */
2564         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2565         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2566         sel.prefixlen_s = sa->sadb_address_prefixlen;
2567         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2568         sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2569         if (sel.sport)
2570                 sel.sport_mask = htons(0xffff);
2571
2572         /* set destination address info of selector */
2573         sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
2574         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2575         sel.prefixlen_d = sa->sadb_address_prefixlen;
2576         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2577         sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2578         if (sel.dport)
2579                 sel.dport_mask = htons(0xffff);
2580
2581         rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2582
2583         /* extract ipsecrequests */
2584         i = 0;
2585         len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2586
2587         while (len > 0 && i < XFRM_MAX_DEPTH) {
2588                 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2589                 if (ret < 0) {
2590                         err = ret;
2591                         goto out;
2592                 } else {
2593                         rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2594                         len -= ret;
2595                         i++;
2596                 }
2597         }
2598
2599         if (!i || len > 0) {
2600                 err = -EINVAL;
2601                 goto out;
2602         }
2603
2604         return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2605                             kma ? &k : NULL, net);
2606
2607  out:
2608         return err;
2609 }
2610 #else
2611 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2612                          const struct sadb_msg *hdr, void * const *ext_hdrs)
2613 {
2614         return -ENOPROTOOPT;
2615 }
2616 #endif
2617
2618
2619 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2620 {
2621         struct net *net = sock_net(sk);
2622         unsigned int dir;
2623         int err = 0, delete;
2624         struct sadb_x_policy *pol;
2625         struct xfrm_policy *xp;
2626         struct km_event c;
2627
2628         if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2629                 return -EINVAL;
2630
2631         dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2632         if (dir >= XFRM_POLICY_MAX)
2633                 return -EINVAL;
2634
2635         delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2636         xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2637                               dir, pol->sadb_x_policy_id, delete, &err);
2638         if (xp == NULL)
2639                 return -ENOENT;
2640
2641         if (delete) {
2642                 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2643
2644                 if (err)
2645                         goto out;
2646                 c.seq = hdr->sadb_msg_seq;
2647                 c.portid = hdr->sadb_msg_pid;
2648                 c.data.byid = 1;
2649                 c.event = XFRM_MSG_DELPOLICY;
2650                 km_policy_notify(xp, dir, &c);
2651         } else {
2652                 err = key_pol_get_resp(sk, xp, hdr, dir);
2653         }
2654
2655 out:
2656         xfrm_pol_put(xp);
2657         if (delete && err == 0)
2658                 xfrm_garbage_collect(net);
2659         return err;
2660 }
2661
2662 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2663 {
2664         struct pfkey_sock *pfk = ptr;
2665         struct sk_buff *out_skb;
2666         struct sadb_msg *out_hdr;
2667         int err;
2668
2669         if (!pfkey_can_dump(&pfk->sk))
2670                 return -ENOBUFS;
2671
2672         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2673         if (IS_ERR(out_skb))
2674                 return PTR_ERR(out_skb);
2675
2676         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2677         if (err < 0)
2678                 return err;
2679
2680         out_hdr = (struct sadb_msg *) out_skb->data;
2681         out_hdr->sadb_msg_version = pfk->dump.msg_version;
2682         out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2683         out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2684         out_hdr->sadb_msg_errno = 0;
2685         out_hdr->sadb_msg_seq = count + 1;
2686         out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
2687
2688         if (pfk->dump.skb)
2689                 pfkey_broadcast(pfk->dump.skb, BROADCAST_ONE,
2690                                 &pfk->sk, sock_net(&pfk->sk));
2691         pfk->dump.skb = out_skb;
2692
2693         return 0;
2694 }
2695
2696 static int pfkey_dump_sp(struct pfkey_sock *pfk)
2697 {
2698         struct net *net = sock_net(&pfk->sk);
2699         return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2700 }
2701
2702 static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2703 {
2704         struct net *net = sock_net((struct sock *)pfk);
2705
2706         xfrm_policy_walk_done(&pfk->dump.u.policy, net);
2707 }
2708
2709 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2710 {
2711         struct pfkey_sock *pfk = pfkey_sk(sk);
2712
2713         mutex_lock(&pfk->dump_lock);
2714         if (pfk->dump.dump != NULL) {
2715                 mutex_unlock(&pfk->dump_lock);
2716                 return -EBUSY;
2717         }
2718
2719         pfk->dump.msg_version = hdr->sadb_msg_version;
2720         pfk->dump.msg_portid = hdr->sadb_msg_pid;
2721         pfk->dump.dump = pfkey_dump_sp;
2722         pfk->dump.done = pfkey_dump_sp_done;
2723         xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2724         mutex_unlock(&pfk->dump_lock);
2725
2726         return pfkey_do_dump(pfk);
2727 }
2728
2729 static int key_notify_policy_flush(const struct km_event *c)
2730 {
2731         struct sk_buff *skb_out;
2732         struct sadb_msg *hdr;
2733
2734         skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2735         if (!skb_out)
2736                 return -ENOBUFS;
2737         hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2738         hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2739         hdr->sadb_msg_seq = c->seq;
2740         hdr->sadb_msg_pid = c->portid;
2741         hdr->sadb_msg_version = PF_KEY_V2;
2742         hdr->sadb_msg_errno = (uint8_t) 0;
2743         hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2744         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2745         hdr->sadb_msg_reserved = 0;
2746         pfkey_broadcast(skb_out, BROADCAST_ALL, NULL, c->net);
2747         return 0;
2748
2749 }
2750
2751 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2752 {
2753         struct net *net = sock_net(sk);
2754         struct km_event c;
2755         int err, err2;
2756
2757         err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, true);
2758         err2 = unicast_flush_resp(sk, hdr);
2759         if (err || err2) {
2760                 if (err == -ESRCH) /* empty table - old silent behavior */
2761                         return 0;
2762                 return err;
2763         }
2764
2765         c.data.type = XFRM_POLICY_TYPE_MAIN;
2766         c.event = XFRM_MSG_FLUSHPOLICY;
2767         c.portid = hdr->sadb_msg_pid;
2768         c.seq = hdr->sadb_msg_seq;
2769         c.net = net;
2770         km_policy_notify(NULL, 0, &c);
2771
2772         return 0;
2773 }
2774
2775 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2776                              const struct sadb_msg *hdr, void * const *ext_hdrs);
2777 static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2778         [SADB_RESERVED]         = pfkey_reserved,
2779         [SADB_GETSPI]           = pfkey_getspi,
2780         [SADB_UPDATE]           = pfkey_add,
2781         [SADB_ADD]              = pfkey_add,
2782         [SADB_DELETE]           = pfkey_delete,
2783         [SADB_GET]              = pfkey_get,
2784         [SADB_ACQUIRE]          = pfkey_acquire,
2785         [SADB_REGISTER]         = pfkey_register,
2786         [SADB_EXPIRE]           = NULL,
2787         [SADB_FLUSH]            = pfkey_flush,
2788         [SADB_DUMP]             = pfkey_dump,
2789         [SADB_X_PROMISC]        = pfkey_promisc,
2790         [SADB_X_PCHANGE]        = NULL,
2791         [SADB_X_SPDUPDATE]      = pfkey_spdadd,
2792         [SADB_X_SPDADD]         = pfkey_spdadd,
2793         [SADB_X_SPDDELETE]      = pfkey_spddelete,
2794         [SADB_X_SPDGET]         = pfkey_spdget,
2795         [SADB_X_SPDACQUIRE]     = NULL,
2796         [SADB_X_SPDDUMP]        = pfkey_spddump,
2797         [SADB_X_SPDFLUSH]       = pfkey_spdflush,
2798         [SADB_X_SPDSETIDX]      = pfkey_spdadd,
2799         [SADB_X_SPDDELETE2]     = pfkey_spdget,
2800         [SADB_X_MIGRATE]        = pfkey_migrate,
2801 };
2802
2803 static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
2804 {
2805         void *ext_hdrs[SADB_EXT_MAX];
2806         int err;
2807
2808         pfkey_broadcast(skb_clone(skb, GFP_KERNEL),
2809                         BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
2810
2811         memset(ext_hdrs, 0, sizeof(ext_hdrs));
2812         err = parse_exthdrs(skb, hdr, ext_hdrs);
2813         if (!err) {
2814                 err = -EOPNOTSUPP;
2815                 if (pfkey_funcs[hdr->sadb_msg_type])
2816                         err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2817         }
2818         return err;
2819 }
2820
2821 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2822 {
2823         struct sadb_msg *hdr = NULL;
2824
2825         if (skb->len < sizeof(*hdr)) {
2826                 *errp = -EMSGSIZE;
2827         } else {
2828                 hdr = (struct sadb_msg *) skb->data;
2829                 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2830                     hdr->sadb_msg_reserved != 0 ||
2831                     (hdr->sadb_msg_type <= SADB_RESERVED ||
2832                      hdr->sadb_msg_type > SADB_MAX)) {
2833                         hdr = NULL;
2834                         *errp = -EINVAL;
2835                 } else if (hdr->sadb_msg_len != (skb->len /
2836                                                  sizeof(uint64_t)) ||
2837                            hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2838                                                 sizeof(uint64_t))) {
2839                         hdr = NULL;
2840                         *errp = -EMSGSIZE;
2841                 } else {
2842                         *errp = 0;
2843                 }
2844         }
2845         return hdr;
2846 }
2847
2848 static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2849                                 const struct xfrm_algo_desc *d)
2850 {
2851         unsigned int id = d->desc.sadb_alg_id;
2852
2853         if (id >= sizeof(t->aalgos) * 8)
2854                 return 0;
2855
2856         return (t->aalgos >> id) & 1;
2857 }
2858
2859 static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2860                                 const struct xfrm_algo_desc *d)
2861 {
2862         unsigned int id = d->desc.sadb_alg_id;
2863
2864         if (id >= sizeof(t->ealgos) * 8)
2865                 return 0;
2866
2867         return (t->ealgos >> id) & 1;
2868 }
2869
2870 static int count_ah_combs(const struct xfrm_tmpl *t)
2871 {
2872         int i, sz = 0;
2873
2874         for (i = 0; ; i++) {
2875                 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2876                 if (!aalg)
2877                         break;
2878                 if (!aalg->pfkey_supported)
2879                         continue;
2880                 if (aalg_tmpl_set(t, aalg) && aalg->available)
2881                         sz += sizeof(struct sadb_comb);
2882         }
2883         return sz + sizeof(struct sadb_prop);
2884 }
2885
2886 static int count_esp_combs(const struct xfrm_tmpl *t)
2887 {
2888         int i, k, sz = 0;
2889
2890         for (i = 0; ; i++) {
2891                 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2892                 if (!ealg)
2893                         break;
2894
2895                 if (!ealg->pfkey_supported)
2896                         continue;
2897
2898                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2899                         continue;
2900
2901                 for (k = 1; ; k++) {
2902                         const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2903                         if (!aalg)
2904                                 break;
2905
2906                         if (!aalg->pfkey_supported)
2907                                 continue;
2908
2909                         if (aalg_tmpl_set(t, aalg) && aalg->available)
2910                                 sz += sizeof(struct sadb_comb);
2911                 }
2912         }
2913         return sz + sizeof(struct sadb_prop);
2914 }
2915
2916 static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2917 {
2918         struct sadb_prop *p;
2919         int i;
2920
2921         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2922         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2923         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2924         p->sadb_prop_replay = 32;
2925         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2926
2927         for (i = 0; ; i++) {
2928                 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2929                 if (!aalg)
2930                         break;
2931
2932                 if (!aalg->pfkey_supported)
2933                         continue;
2934
2935                 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2936                         struct sadb_comb *c;
2937                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2938                         memset(c, 0, sizeof(*c));
2939                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2940                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2941                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2942                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2943                         c->sadb_comb_hard_addtime = 24*60*60;
2944                         c->sadb_comb_soft_addtime = 20*60*60;
2945                         c->sadb_comb_hard_usetime = 8*60*60;
2946                         c->sadb_comb_soft_usetime = 7*60*60;
2947                 }
2948         }
2949 }
2950
2951 static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2952 {
2953         struct sadb_prop *p;
2954         int i, k;
2955
2956         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2957         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2958         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2959         p->sadb_prop_replay = 32;
2960         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2961
2962         for (i=0; ; i++) {
2963                 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2964                 if (!ealg)
2965                         break;
2966
2967                 if (!ealg->pfkey_supported)
2968                         continue;
2969
2970                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2971                         continue;
2972
2973                 for (k = 1; ; k++) {
2974                         struct sadb_comb *c;
2975                         const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2976                         if (!aalg)
2977                                 break;
2978                         if (!aalg->pfkey_supported)
2979                                 continue;
2980                         if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2981                                 continue;
2982                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2983                         memset(c, 0, sizeof(*c));
2984                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2985                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2986                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2987                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2988                         c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2989                         c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2990                         c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2991                         c->sadb_comb_hard_addtime = 24*60*60;
2992                         c->sadb_comb_soft_addtime = 20*60*60;
2993                         c->sadb_comb_hard_usetime = 8*60*60;
2994                         c->sadb_comb_soft_usetime = 7*60*60;
2995                 }
2996         }
2997 }
2998
2999 static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
3000 {
3001         return 0;
3002 }
3003
3004 static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
3005 {
3006         struct sk_buff *out_skb;
3007         struct sadb_msg *out_hdr;
3008         int hard;
3009         int hsc;
3010
3011         hard = c->data.hard;
3012         if (hard)
3013                 hsc = 2;
3014         else
3015                 hsc = 1;
3016
3017         out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
3018         if (IS_ERR(out_skb))
3019                 return PTR_ERR(out_skb);
3020
3021         out_hdr = (struct sadb_msg *) out_skb->data;
3022         out_hdr->sadb_msg_version = PF_KEY_V2;
3023         out_hdr->sadb_msg_type = SADB_EXPIRE;
3024         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3025         out_hdr->sadb_msg_errno = 0;
3026         out_hdr->sadb_msg_reserved = 0;
3027         out_hdr->sadb_msg_seq = 0;
3028         out_hdr->sadb_msg_pid = 0;
3029
3030         pfkey_broadcast(out_skb, BROADCAST_REGISTERED, NULL, xs_net(x));
3031         return 0;
3032 }
3033
3034 static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
3035 {
3036         struct net *net = x ? xs_net(x) : c->net;
3037         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3038
3039         if (atomic_read(&net_pfkey->socks_nr) == 0)
3040                 return 0;
3041
3042         switch (c->event) {
3043         case XFRM_MSG_EXPIRE:
3044                 return key_notify_sa_expire(x, c);
3045         case XFRM_MSG_DELSA:
3046         case XFRM_MSG_NEWSA:
3047         case XFRM_MSG_UPDSA:
3048                 return key_notify_sa(x, c);
3049         case XFRM_MSG_FLUSHSA:
3050                 return key_notify_sa_flush(c);
3051         case XFRM_MSG_NEWAE: /* not yet supported */
3052                 break;
3053         default:
3054                 pr_err("pfkey: Unknown SA event %d\n", c->event);
3055                 break;
3056         }
3057
3058         return 0;
3059 }
3060
3061 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3062 {
3063         if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3064                 return 0;
3065
3066         switch (c->event) {
3067         case XFRM_MSG_POLEXPIRE:
3068                 return key_notify_policy_expire(xp, c);
3069         case XFRM_MSG_DELPOLICY:
3070         case XFRM_MSG_NEWPOLICY:
3071         case XFRM_MSG_UPDPOLICY:
3072                 return key_notify_policy(xp, dir, c);
3073         case XFRM_MSG_FLUSHPOLICY:
3074                 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3075                         break;
3076                 return key_notify_policy_flush(c);
3077         default:
3078                 pr_err("pfkey: Unknown policy event %d\n", c->event);
3079                 break;
3080         }
3081
3082         return 0;
3083 }
3084
3085 static u32 get_acqseq(void)
3086 {
3087         u32 res;
3088         static atomic_t acqseq;
3089
3090         do {
3091                 res = atomic_inc_return(&acqseq);
3092         } while (!res);
3093         return res;
3094 }
3095
3096 static bool pfkey_is_alive(const struct km_event *c)
3097 {
3098         struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id);
3099         struct sock *sk;
3100         bool is_alive = false;
3101
3102         rcu_read_lock();
3103         sk_for_each_rcu(sk, &net_pfkey->table) {
3104                 if (pfkey_sk(sk)->registered) {
3105                         is_alive = true;
3106                         break;
3107                 }
3108         }
3109         rcu_read_unlock();
3110
3111         return is_alive;
3112 }
3113
3114 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
3115 {
3116         struct sk_buff *skb;
3117         struct sadb_msg *hdr;
3118         struct sadb_address *addr;
3119         struct sadb_x_policy *pol;
3120         int sockaddr_size;
3121         int size;
3122         struct sadb_x_sec_ctx *sec_ctx;
3123         struct xfrm_sec_ctx *xfrm_ctx;
3124         int ctx_size = 0;
3125
3126         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3127         if (!sockaddr_size)
3128                 return -EINVAL;
3129
3130         size = sizeof(struct sadb_msg) +
3131                 (sizeof(struct sadb_address) * 2) +
3132                 (sockaddr_size * 2) +
3133                 sizeof(struct sadb_x_policy);
3134
3135         if (x->id.proto == IPPROTO_AH)
3136                 size += count_ah_combs(t);
3137         else if (x->id.proto == IPPROTO_ESP)
3138                 size += count_esp_combs(t);
3139
3140         if ((xfrm_ctx = x->security)) {
3141                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3142                 size +=  sizeof(struct sadb_x_sec_ctx) + ctx_size;
3143         }
3144
3145         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3146         if (skb == NULL)
3147                 return -ENOMEM;
3148
3149         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3150         hdr->sadb_msg_version = PF_KEY_V2;
3151         hdr->sadb_msg_type = SADB_ACQUIRE;
3152         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3153         hdr->sadb_msg_len = size / sizeof(uint64_t);
3154         hdr->sadb_msg_errno = 0;
3155         hdr->sadb_msg_reserved = 0;
3156         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3157         hdr->sadb_msg_pid = 0;
3158
3159         /* src address */
3160         addr = (struct sadb_address*) skb_put(skb,
3161                                               sizeof(struct sadb_address)+sockaddr_size);
3162         addr->sadb_address_len =
3163                 (sizeof(struct sadb_address)+sockaddr_size)/
3164                         sizeof(uint64_t);
3165         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3166         addr->sadb_address_proto = 0;
3167         addr->sadb_address_reserved = 0;
3168         addr->sadb_address_prefixlen =
3169                 pfkey_sockaddr_fill(&x->props.saddr, 0,
3170                                     (struct sockaddr *) (addr + 1),
3171                                     x->props.family);
3172         if (!addr->sadb_address_prefixlen)
3173                 BUG();
3174
3175         /* dst address */
3176         addr = (struct sadb_address*) skb_put(skb,
3177                                               sizeof(struct sadb_address)+sockaddr_size);
3178         addr->sadb_address_len =
3179                 (sizeof(struct sadb_address)+sockaddr_size)/
3180                         sizeof(uint64_t);
3181         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3182         addr->sadb_address_proto = 0;
3183         addr->sadb_address_reserved = 0;
3184         addr->sadb_address_prefixlen =
3185                 pfkey_sockaddr_fill(&x->id.daddr, 0,
3186                                     (struct sockaddr *) (addr + 1),
3187                                     x->props.family);
3188         if (!addr->sadb_address_prefixlen)
3189                 BUG();
3190
3191         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
3192         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3193         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3194         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3195         pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
3196         pol->sadb_x_policy_reserved = 0;
3197         pol->sadb_x_policy_id = xp->index;
3198         pol->sadb_x_policy_priority = xp->priority;
3199
3200         /* Set sadb_comb's. */
3201         if (x->id.proto == IPPROTO_AH)
3202                 dump_ah_combs(skb, t);
3203         else if (x->id.proto == IPPROTO_ESP)
3204                 dump_esp_combs(skb, t);
3205
3206         /* security context */
3207         if (xfrm_ctx) {
3208                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3209                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3210                 sec_ctx->sadb_x_sec_len =
3211                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3212                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3213                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3214                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3215                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3216                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3217                        xfrm_ctx->ctx_len);
3218         }
3219
3220         return pfkey_broadcast(skb, BROADCAST_REGISTERED, NULL, xs_net(x));
3221 }
3222
3223 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3224                                                 u8 *data, int len, int *dir)
3225 {
3226         struct net *net = sock_net(sk);
3227         struct xfrm_policy *xp;
3228         struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3229         struct sadb_x_sec_ctx *sec_ctx;
3230
3231         switch (sk->sk_family) {
3232         case AF_INET:
3233                 if (opt != IP_IPSEC_POLICY) {
3234                         *dir = -EOPNOTSUPP;
3235                         return NULL;
3236                 }
3237                 break;
3238 #if IS_ENABLED(CONFIG_IPV6)
3239         case AF_INET6:
3240                 if (opt != IPV6_IPSEC_POLICY) {
3241                         *dir = -EOPNOTSUPP;
3242                         return NULL;
3243                 }
3244                 break;
3245 #endif
3246         default:
3247                 *dir = -EINVAL;
3248                 return NULL;
3249         }
3250
3251         *dir = -EINVAL;
3252
3253         if (len < sizeof(struct sadb_x_policy) ||
3254             pol->sadb_x_policy_len*8 > len ||
3255             pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3256             (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3257                 return NULL;
3258
3259         xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3260         if (xp == NULL) {
3261                 *dir = -ENOBUFS;
3262                 return NULL;
3263         }
3264
3265         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3266                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3267
3268         xp->lft.soft_byte_limit = XFRM_INF;
3269         xp->lft.hard_byte_limit = XFRM_INF;
3270         xp->lft.soft_packet_limit = XFRM_INF;
3271         xp->lft.hard_packet_limit = XFRM_INF;
3272         xp->family = sk->sk_family;
3273
3274         xp->xfrm_nr = 0;
3275         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3276             (*dir = parse_ipsecrequests(xp, pol)) < 0)
3277                 goto out;
3278
3279         /* security context too */
3280         if (len >= (pol->sadb_x_policy_len*8 +
3281             sizeof(struct sadb_x_sec_ctx))) {
3282                 char *p = (char *)pol;
3283                 struct xfrm_user_sec_ctx *uctx;
3284
3285                 p += pol->sadb_x_policy_len*8;
3286                 sec_ctx = (struct sadb_x_sec_ctx *)p;
3287                 if (len < pol->sadb_x_policy_len*8 +
3288                     sec_ctx->sadb_x_sec_len) {
3289                         *dir = -EINVAL;
3290                         goto out;
3291                 }
3292                 if ((*dir = verify_sec_ctx_len(p)))
3293                         goto out;
3294                 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC);
3295                 *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC);
3296                 kfree(uctx);
3297
3298                 if (*dir)
3299                         goto out;
3300         }
3301
3302         *dir = pol->sadb_x_policy_dir-1;
3303         return xp;
3304
3305 out:
3306         xp->walk.dead = 1;
3307         xfrm_policy_destroy(xp);
3308         return NULL;
3309 }
3310
3311 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3312 {
3313         struct sk_buff *skb;
3314         struct sadb_msg *hdr;
3315         struct sadb_sa *sa;
3316         struct sadb_address *addr;
3317         struct sadb_x_nat_t_port *n_port;
3318         int sockaddr_size;
3319         int size;
3320         __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3321         struct xfrm_encap_tmpl *natt = NULL;
3322
3323         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3324         if (!sockaddr_size)
3325                 return -EINVAL;
3326
3327         if (!satype)
3328                 return -EINVAL;
3329
3330         if (!x->encap)
3331                 return -EINVAL;
3332
3333         natt = x->encap;
3334
3335         /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3336          *
3337          * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3338          * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3339          */
3340
3341         size = sizeof(struct sadb_msg) +
3342                 sizeof(struct sadb_sa) +
3343                 (sizeof(struct sadb_address) * 2) +
3344                 (sockaddr_size * 2) +
3345                 (sizeof(struct sadb_x_nat_t_port) * 2);
3346
3347         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3348         if (skb == NULL)
3349                 return -ENOMEM;
3350
3351         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3352         hdr->sadb_msg_version = PF_KEY_V2;
3353         hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3354         hdr->sadb_msg_satype = satype;
3355         hdr->sadb_msg_len = size / sizeof(uint64_t);
3356         hdr->sadb_msg_errno = 0;
3357         hdr->sadb_msg_reserved = 0;
3358         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3359         hdr->sadb_msg_pid = 0;
3360
3361         /* SA */
3362         sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3363         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3364         sa->sadb_sa_exttype = SADB_EXT_SA;
3365         sa->sadb_sa_spi = x->id.spi;
3366         sa->sadb_sa_replay = 0;
3367         sa->sadb_sa_state = 0;
3368         sa->sadb_sa_auth = 0;
3369         sa->sadb_sa_encrypt = 0;
3370         sa->sadb_sa_flags = 0;
3371
3372         /* ADDRESS_SRC (old addr) */
3373         addr = (struct sadb_address*)
3374                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3375         addr->sadb_address_len =
3376                 (sizeof(struct sadb_address)+sockaddr_size)/
3377                         sizeof(uint64_t);
3378         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3379         addr->sadb_address_proto = 0;
3380         addr->sadb_address_reserved = 0;
3381         addr->sadb_address_prefixlen =
3382                 pfkey_sockaddr_fill(&x->props.saddr, 0,
3383                                     (struct sockaddr *) (addr + 1),
3384                                     x->props.family);
3385         if (!addr->sadb_address_prefixlen)
3386                 BUG();
3387
3388         /* NAT_T_SPORT (old port) */
3389         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3390         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3391         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3392         n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3393         n_port->sadb_x_nat_t_port_reserved = 0;
3394
3395         /* ADDRESS_DST (new addr) */
3396         addr = (struct sadb_address*)
3397                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3398         addr->sadb_address_len =
3399                 (sizeof(struct sadb_address)+sockaddr_size)/
3400                         sizeof(uint64_t);
3401         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3402         addr->sadb_address_proto = 0;
3403         addr->sadb_address_reserved = 0;
3404         addr->sadb_address_prefixlen =
3405                 pfkey_sockaddr_fill(ipaddr, 0,
3406                                     (struct sockaddr *) (addr + 1),
3407                                     x->props.family);
3408         if (!addr->sadb_address_prefixlen)
3409                 BUG();
3410
3411         /* NAT_T_DPORT (new port) */
3412         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3413         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3414         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3415         n_port->sadb_x_nat_t_port_port = sport;
3416         n_port->sadb_x_nat_t_port_reserved = 0;
3417
3418         return pfkey_broadcast(skb, BROADCAST_REGISTERED, NULL, xs_net(x));
3419 }
3420
3421 #ifdef CONFIG_NET_KEY_MIGRATE
3422 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3423                             const struct xfrm_selector *sel)
3424 {
3425         struct sadb_address *addr;
3426         addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3427         addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3428         addr->sadb_address_exttype = type;
3429         addr->sadb_address_proto = sel->proto;
3430         addr->sadb_address_reserved = 0;
3431
3432         switch (type) {
3433         case SADB_EXT_ADDRESS_SRC:
3434                 addr->sadb_address_prefixlen = sel->prefixlen_s;
3435                 pfkey_sockaddr_fill(&sel->saddr, 0,
3436                                     (struct sockaddr *)(addr + 1),
3437                                     sel->family);
3438                 break;
3439         case SADB_EXT_ADDRESS_DST:
3440                 addr->sadb_address_prefixlen = sel->prefixlen_d;
3441                 pfkey_sockaddr_fill(&sel->daddr, 0,
3442                                     (struct sockaddr *)(addr + 1),
3443                                     sel->family);
3444                 break;
3445         default:
3446                 return -EINVAL;
3447         }
3448
3449         return 0;
3450 }
3451
3452
3453 static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
3454 {
3455         struct sadb_x_kmaddress *kma;
3456         u8 *sa;
3457         int family = k->family;
3458         int socklen = pfkey_sockaddr_len(family);
3459         int size_req;
3460
3461         size_req = (sizeof(struct sadb_x_kmaddress) +
3462                     pfkey_sockaddr_pair_size(family));
3463
3464         kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req);
3465         memset(kma, 0, size_req);
3466         kma->sadb_x_kmaddress_len = size_req / 8;
3467         kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3468         kma->sadb_x_kmaddress_reserved = k->reserved;
3469
3470         sa = (u8 *)(kma + 1);
3471         if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3472             !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3473                 return -EINVAL;
3474
3475         return 0;
3476 }
3477
3478 static int set_ipsecrequest(struct sk_buff *skb,
3479                             uint8_t proto, uint8_t mode, int level,
3480                             uint32_t reqid, uint8_t family,
3481                             const xfrm_address_t *src, const xfrm_address_t *dst)
3482 {
3483         struct sadb_x_ipsecrequest *rq;
3484         u8 *sa;
3485         int socklen = pfkey_sockaddr_len(family);
3486         int size_req;
3487
3488         size_req = sizeof(struct sadb_x_ipsecrequest) +
3489                    pfkey_sockaddr_pair_size(family);
3490
3491         rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3492         memset(rq, 0, size_req);
3493         rq->sadb_x_ipsecrequest_len = size_req;
3494         rq->sadb_x_ipsecrequest_proto = proto;
3495         rq->sadb_x_ipsecrequest_mode = mode;
3496         rq->sadb_x_ipsecrequest_level = level;
3497         rq->sadb_x_ipsecrequest_reqid = reqid;
3498
3499         sa = (u8 *) (rq + 1);
3500         if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3501             !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3502                 return -EINVAL;
3503
3504         return 0;
3505 }
3506 #endif
3507
3508 #ifdef CONFIG_NET_KEY_MIGRATE
3509 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3510                               const struct xfrm_migrate *m, int num_bundles,
3511                               const struct xfrm_kmaddress *k)
3512 {
3513         int i;
3514         int sasize_sel;
3515         int size = 0;
3516         int size_pol = 0;
3517         struct sk_buff *skb;
3518         struct sadb_msg *hdr;
3519         struct sadb_x_policy *pol;
3520         const struct xfrm_migrate *mp;
3521
3522         if (type != XFRM_POLICY_TYPE_MAIN)
3523                 return 0;
3524
3525         if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3526                 return -EINVAL;
3527
3528         if (k != NULL) {
3529                 /* addresses for KM */
3530                 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3531                                      pfkey_sockaddr_pair_size(k->family));
3532         }
3533
3534         /* selector */
3535         sasize_sel = pfkey_sockaddr_size(sel->family);
3536         if (!sasize_sel)
3537                 return -EINVAL;
3538         size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3539
3540         /* policy info */
3541         size_pol += sizeof(struct sadb_x_policy);
3542
3543         /* ipsecrequests */
3544         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3545                 /* old locator pair */
3546                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3547                             pfkey_sockaddr_pair_size(mp->old_family);
3548                 /* new locator pair */
3549                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3550                             pfkey_sockaddr_pair_size(mp->new_family);
3551         }
3552
3553         size += sizeof(struct sadb_msg) + size_pol;
3554
3555         /* alloc buffer */
3556         skb = alloc_skb(size, GFP_ATOMIC);
3557         if (skb == NULL)
3558                 return -ENOMEM;
3559
3560         hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3561         hdr->sadb_msg_version = PF_KEY_V2;
3562         hdr->sadb_msg_type = SADB_X_MIGRATE;
3563         hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3564         hdr->sadb_msg_len = size / 8;
3565         hdr->sadb_msg_errno = 0;
3566         hdr->sadb_msg_reserved = 0;
3567         hdr->sadb_msg_seq = 0;
3568         hdr->sadb_msg_pid = 0;
3569
3570         /* Addresses to be used by KM for negotiation, if ext is available */
3571         if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3572                 goto err;
3573
3574         /* selector src */
3575         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3576
3577         /* selector dst */
3578         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3579
3580         /* policy information */
3581         pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3582         pol->sadb_x_policy_len = size_pol / 8;
3583         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3584         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3585         pol->sadb_x_policy_dir = dir + 1;
3586         pol->sadb_x_policy_reserved = 0;
3587         pol->sadb_x_policy_id = 0;
3588         pol->sadb_x_policy_priority = 0;
3589
3590         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3591                 /* old ipsecrequest */
3592                 int mode = pfkey_mode_from_xfrm(mp->mode);
3593                 if (mode < 0)
3594                         goto err;
3595                 if (set_ipsecrequest(skb, mp->proto, mode,
3596                                      (mp->reqid ?  IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3597                                      mp->reqid, mp->old_family,
3598                                      &mp->old_saddr, &mp->old_daddr) < 0)
3599                         goto err;
3600
3601                 /* new ipsecrequest */
3602                 if (set_ipsecrequest(skb, mp->proto, mode,
3603                                      (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3604                                      mp->reqid, mp->new_family,
3605                                      &mp->new_saddr, &mp->new_daddr) < 0)
3606                         goto err;
3607         }
3608
3609         /* broadcast migrate message to sockets */
3610         pfkey_broadcast(skb, BROADCAST_ALL, NULL, &init_net);
3611
3612         return 0;
3613
3614 err:
3615         kfree_skb(skb);
3616         return -EINVAL;
3617 }
3618 #else
3619 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3620                               const struct xfrm_migrate *m, int num_bundles,
3621                               const struct xfrm_kmaddress *k)
3622 {
3623         return -ENOPROTOOPT;
3624 }
3625 #endif
3626
3627 static int pfkey_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
3628 {
3629         struct sock *sk = sock->sk;
3630         struct sk_buff *skb = NULL;
3631         struct sadb_msg *hdr = NULL;
3632         int err;
3633         struct net *net = sock_net(sk);
3634
3635         err = -EOPNOTSUPP;
3636         if (msg->msg_flags & MSG_OOB)
3637                 goto out;
3638
3639         err = -EMSGSIZE;
3640         if ((unsigned int)len > sk->sk_sndbuf - 32)
3641                 goto out;
3642
3643         err = -ENOBUFS;
3644         skb = alloc_skb(len, GFP_KERNEL);
3645         if (skb == NULL)
3646                 goto out;
3647
3648         err = -EFAULT;
3649         if (memcpy_from_msg(skb_put(skb,len), msg, len))
3650                 goto out;
3651
3652         hdr = pfkey_get_base_msg(skb, &err);
3653         if (!hdr)
3654                 goto out;
3655
3656         mutex_lock(&net->xfrm.xfrm_cfg_mutex);
3657         err = pfkey_process(sk, skb, hdr);
3658         mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
3659
3660 out:
3661         if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3662                 err = 0;
3663         kfree_skb(skb);
3664
3665         return err ? : len;
3666 }
3667
3668 static int pfkey_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
3669                          int flags)
3670 {
3671         struct sock *sk = sock->sk;
3672         struct pfkey_sock *pfk = pfkey_sk(sk);
3673         struct sk_buff *skb;
3674         int copied, err;
3675
3676         err = -EINVAL;
3677         if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3678                 goto out;
3679
3680         skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3681         if (skb == NULL)
3682                 goto out;
3683
3684         copied = skb->len;
3685         if (copied > len) {
3686                 msg->msg_flags |= MSG_TRUNC;
3687                 copied = len;
3688         }
3689
3690         skb_reset_transport_header(skb);
3691         err = skb_copy_datagram_msg(skb, 0, msg, copied);
3692         if (err)
3693                 goto out_free;
3694
3695         sock_recv_ts_and_drops(msg, sk, skb);
3696
3697         err = (flags & MSG_TRUNC) ? skb->len : copied;
3698
3699         if (pfk->dump.dump != NULL &&
3700             3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3701                 pfkey_do_dump(pfk);
3702
3703 out_free:
3704         skb_free_datagram(sk, skb);
3705 out:
3706         return err;
3707 }
3708
3709 static const struct proto_ops pfkey_ops = {
3710         .family         =       PF_KEY,
3711         .owner          =       THIS_MODULE,
3712         /* Operations that make no sense on pfkey sockets. */
3713         .bind           =       sock_no_bind,
3714         .connect        =       sock_no_connect,
3715         .socketpair     =       sock_no_socketpair,
3716         .accept         =       sock_no_accept,
3717         .getname        =       sock_no_getname,
3718         .ioctl          =       sock_no_ioctl,
3719         .listen         =       sock_no_listen,
3720         .shutdown       =       sock_no_shutdown,
3721         .setsockopt     =       sock_no_setsockopt,
3722         .getsockopt     =       sock_no_getsockopt,
3723         .mmap           =       sock_no_mmap,
3724         .sendpage       =       sock_no_sendpage,
3725
3726         /* Now the operations that really occur. */
3727         .release        =       pfkey_release,
3728         .poll           =       datagram_poll,
3729         .sendmsg        =       pfkey_sendmsg,
3730         .recvmsg        =       pfkey_recvmsg,
3731 };
3732
3733 static const struct net_proto_family pfkey_family_ops = {
3734         .family =       PF_KEY,
3735         .create =       pfkey_create,
3736         .owner  =       THIS_MODULE,
3737 };
3738
3739 #ifdef CONFIG_PROC_FS
3740 static int pfkey_seq_show(struct seq_file *f, void *v)
3741 {
3742         struct sock *s = sk_entry(v);
3743
3744         if (v == SEQ_START_TOKEN)
3745                 seq_printf(f ,"sk       RefCnt Rmem   Wmem   User   Inode\n");
3746         else
3747                 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
3748                                s,
3749                                atomic_read(&s->sk_refcnt),
3750                                sk_rmem_alloc_get(s),
3751                                sk_wmem_alloc_get(s),
3752                                from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
3753                                sock_i_ino(s)
3754                                );
3755         return 0;
3756 }
3757
3758 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3759         __acquires(rcu)
3760 {
3761         struct net *net = seq_file_net(f);
3762         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3763
3764         rcu_read_lock();
3765         return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
3766 }
3767
3768 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3769 {
3770         struct net *net = seq_file_net(f);
3771         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3772
3773         return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
3774 }
3775
3776 static void pfkey_seq_stop(struct seq_file *f, void *v)
3777         __releases(rcu)
3778 {
3779         rcu_read_unlock();
3780 }
3781
3782 static const struct seq_operations pfkey_seq_ops = {
3783         .start  = pfkey_seq_start,
3784         .next   = pfkey_seq_next,
3785         .stop   = pfkey_seq_stop,
3786         .show   = pfkey_seq_show,
3787 };
3788
3789 static int pfkey_seq_open(struct inode *inode, struct file *file)
3790 {
3791         return seq_open_net(inode, file, &pfkey_seq_ops,
3792                             sizeof(struct seq_net_private));
3793 }
3794
3795 static const struct file_operations pfkey_proc_ops = {
3796         .open    = pfkey_seq_open,
3797         .read    = seq_read,
3798         .llseek  = seq_lseek,
3799         .release = seq_release_net,
3800 };
3801
3802 static int __net_init pfkey_init_proc(struct net *net)
3803 {
3804         struct proc_dir_entry *e;
3805
3806         e = proc_create("pfkey", 0, net->proc_net, &pfkey_proc_ops);
3807         if (e == NULL)
3808                 return -ENOMEM;
3809
3810         return 0;
3811 }
3812
3813 static void __net_exit pfkey_exit_proc(struct net *net)
3814 {
3815         remove_proc_entry("pfkey", net->proc_net);
3816 }
3817 #else
3818 static inline int pfkey_init_proc(struct net *net)
3819 {
3820         return 0;
3821 }
3822
3823 static inline void pfkey_exit_proc(struct net *net)
3824 {
3825 }
3826 #endif
3827
3828 static struct xfrm_mgr pfkeyv2_mgr =
3829 {
3830         .notify         = pfkey_send_notify,
3831         .acquire        = pfkey_send_acquire,
3832         .compile_policy = pfkey_compile_policy,
3833         .new_mapping    = pfkey_send_new_mapping,
3834         .notify_policy  = pfkey_send_policy_notify,
3835         .migrate        = pfkey_send_migrate,
3836         .is_alive       = pfkey_is_alive,
3837 };
3838
3839 static int __net_init pfkey_net_init(struct net *net)
3840 {
3841         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3842         int rv;
3843
3844         INIT_HLIST_HEAD(&net_pfkey->table);
3845         atomic_set(&net_pfkey->socks_nr, 0);
3846
3847         rv = pfkey_init_proc(net);
3848
3849         return rv;
3850 }
3851
3852 static void __net_exit pfkey_net_exit(struct net *net)
3853 {
3854         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3855
3856         pfkey_exit_proc(net);
3857         BUG_ON(!hlist_empty(&net_pfkey->table));
3858 }
3859
3860 static struct pernet_operations pfkey_net_ops = {
3861         .init = pfkey_net_init,
3862         .exit = pfkey_net_exit,
3863         .id   = &pfkey_net_id,
3864         .size = sizeof(struct netns_pfkey),
3865 };
3866
3867 static void __exit ipsec_pfkey_exit(void)
3868 {
3869         xfrm_unregister_km(&pfkeyv2_mgr);
3870         sock_unregister(PF_KEY);
3871         unregister_pernet_subsys(&pfkey_net_ops);
3872         proto_unregister(&key_proto);
3873 }
3874
3875 static int __init ipsec_pfkey_init(void)
3876 {
3877         int err = proto_register(&key_proto, 0);
3878
3879         if (err != 0)
3880                 goto out;
3881
3882         err = register_pernet_subsys(&pfkey_net_ops);
3883         if (err != 0)
3884                 goto out_unregister_key_proto;
3885         err = sock_register(&pfkey_family_ops);
3886         if (err != 0)
3887                 goto out_unregister_pernet;
3888         err = xfrm_register_km(&pfkeyv2_mgr);
3889         if (err != 0)
3890                 goto out_sock_unregister;
3891 out:
3892         return err;
3893
3894 out_sock_unregister:
3895         sock_unregister(PF_KEY);
3896 out_unregister_pernet:
3897         unregister_pernet_subsys(&pfkey_net_ops);
3898 out_unregister_key_proto:
3899         proto_unregister(&key_proto);
3900         goto out;
3901 }
3902
3903 module_init(ipsec_pfkey_init);
3904 module_exit(ipsec_pfkey_exit);
3905 MODULE_LICENSE("GPL");
3906 MODULE_ALIAS_NETPROTO(PF_KEY);