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         err = -ENOBUFS;
1161         key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1162         if (sa->sadb_sa_auth) {
1163                 int keysize = 0;
1164                 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1165                 if (!a || !a->pfkey_supported) {
1166                         err = -ENOSYS;
1167                         goto out;
1168                 }
1169                 if (key)
1170                         keysize = (key->sadb_key_bits + 7) / 8;
1171                 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1172                 if (!x->aalg) {
1173                         err = -ENOMEM;
1174                         goto out;
1175                 }
1176                 strcpy(x->aalg->alg_name, a->name);
1177                 x->aalg->alg_key_len = 0;
1178                 if (key) {
1179                         x->aalg->alg_key_len = key->sadb_key_bits;
1180                         memcpy(x->aalg->alg_key, key+1, keysize);
1181                 }
1182                 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1183                 x->props.aalgo = sa->sadb_sa_auth;
1184                 /* x->algo.flags = sa->sadb_sa_flags; */
1185         }
1186         if (sa->sadb_sa_encrypt) {
1187                 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1188                         struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1189                         if (!a || !a->pfkey_supported) {
1190                                 err = -ENOSYS;
1191                                 goto out;
1192                         }
1193                         x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1194                         if (!x->calg) {
1195                                 err = -ENOMEM;
1196                                 goto out;
1197                         }
1198                         strcpy(x->calg->alg_name, a->name);
1199                         x->props.calgo = sa->sadb_sa_encrypt;
1200                 } else {
1201                         int keysize = 0;
1202                         struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1203                         if (!a || !a->pfkey_supported) {
1204                                 err = -ENOSYS;
1205                                 goto out;
1206                         }
1207                         key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1208                         if (key)
1209                                 keysize = (key->sadb_key_bits + 7) / 8;
1210                         x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1211                         if (!x->ealg) {
1212                                 err = -ENOMEM;
1213                                 goto out;
1214                         }
1215                         strcpy(x->ealg->alg_name, a->name);
1216                         x->ealg->alg_key_len = 0;
1217                         if (key) {
1218                                 x->ealg->alg_key_len = key->sadb_key_bits;
1219                                 memcpy(x->ealg->alg_key, key+1, keysize);
1220                         }
1221                         x->props.ealgo = sa->sadb_sa_encrypt;
1222                         x->geniv = a->uinfo.encr.geniv;
1223                 }
1224         }
1225         /* x->algo.flags = sa->sadb_sa_flags; */
1226
1227         x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1228                                                     &x->props.saddr);
1229         pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1230                                   &x->id.daddr);
1231
1232         if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1233                 const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
1234                 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1235                 if (mode < 0) {
1236                         err = -EINVAL;
1237                         goto out;
1238                 }
1239                 x->props.mode = mode;
1240                 x->props.reqid = sa2->sadb_x_sa2_reqid;
1241         }
1242
1243         if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1244                 const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1245
1246                 /* Nobody uses this, but we try. */
1247                 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1248                 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1249         }
1250
1251         if (!x->sel.family)
1252                 x->sel.family = x->props.family;
1253
1254         if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1255                 const struct sadb_x_nat_t_type* n_type;
1256                 struct xfrm_encap_tmpl *natt;
1257
1258                 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1259                 if (!x->encap) {
1260                         err = -ENOMEM;
1261                         goto out;
1262                 }
1263
1264                 natt = x->encap;
1265                 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1266                 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1267
1268                 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1269                         const struct sadb_x_nat_t_port *n_port =
1270                                 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1271                         natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1272                 }
1273                 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1274                         const struct sadb_x_nat_t_port *n_port =
1275                                 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1276                         natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1277                 }
1278                 memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
1279         }
1280
1281         err = xfrm_init_state(x);
1282         if (err)
1283                 goto out;
1284
1285         x->km.seq = hdr->sadb_msg_seq;
1286         return x;
1287
1288 out:
1289         x->km.state = XFRM_STATE_DEAD;
1290         xfrm_state_put(x);
1291         return ERR_PTR(err);
1292 }
1293
1294 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1295 {
1296         return -EOPNOTSUPP;
1297 }
1298
1299 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1300 {
1301         struct net *net = sock_net(sk);
1302         struct sk_buff *resp_skb;
1303         struct sadb_x_sa2 *sa2;
1304         struct sadb_address *saddr, *daddr;
1305         struct sadb_msg *out_hdr;
1306         struct sadb_spirange *range;
1307         struct xfrm_state *x = NULL;
1308         int mode;
1309         int err;
1310         u32 min_spi, max_spi;
1311         u32 reqid;
1312         u8 proto;
1313         unsigned short family;
1314         xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1315
1316         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1317                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1318                 return -EINVAL;
1319
1320         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1321         if (proto == 0)
1322                 return -EINVAL;
1323
1324         if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1325                 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1326                 if (mode < 0)
1327                         return -EINVAL;
1328                 reqid = sa2->sadb_x_sa2_reqid;
1329         } else {
1330                 mode = 0;
1331                 reqid = 0;
1332         }
1333
1334         saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1335         daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1336
1337         family = ((struct sockaddr *)(saddr + 1))->sa_family;
1338         switch (family) {
1339         case AF_INET:
1340                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1341                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1342                 break;
1343 #if IS_ENABLED(CONFIG_IPV6)
1344         case AF_INET6:
1345                 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1346                 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1347                 break;
1348 #endif
1349         }
1350
1351         if (hdr->sadb_msg_seq) {
1352                 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1353                 if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) {
1354                         xfrm_state_put(x);
1355                         x = NULL;
1356                 }
1357         }
1358
1359         if (!x)
1360                 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family);
1361
1362         if (x == NULL)
1363                 return -ENOENT;
1364
1365         min_spi = 0x100;
1366         max_spi = 0x0fffffff;
1367
1368         range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1369         if (range) {
1370                 min_spi = range->sadb_spirange_min;
1371                 max_spi = range->sadb_spirange_max;
1372         }
1373
1374         err = verify_spi_info(x->id.proto, min_spi, max_spi);
1375         if (err) {
1376                 xfrm_state_put(x);
1377                 return err;
1378         }
1379
1380         err = xfrm_alloc_spi(x, min_spi, max_spi);
1381         resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1382
1383         if (IS_ERR(resp_skb)) {
1384                 xfrm_state_put(x);
1385                 return  PTR_ERR(resp_skb);
1386         }
1387
1388         out_hdr = (struct sadb_msg *) resp_skb->data;
1389         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1390         out_hdr->sadb_msg_type = SADB_GETSPI;
1391         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1392         out_hdr->sadb_msg_errno = 0;
1393         out_hdr->sadb_msg_reserved = 0;
1394         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1395         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1396
1397         xfrm_state_put(x);
1398
1399         pfkey_broadcast(resp_skb, BROADCAST_ONE, sk, net);
1400
1401         return 0;
1402 }
1403
1404 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1405 {
1406         struct net *net = sock_net(sk);
1407         struct xfrm_state *x;
1408
1409         if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1410                 return -EOPNOTSUPP;
1411
1412         if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1413                 return 0;
1414
1415         x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1416         if (x == NULL)
1417                 return 0;
1418
1419         spin_lock_bh(&x->lock);
1420         if (x->km.state == XFRM_STATE_ACQ)
1421                 x->km.state = XFRM_STATE_ERROR;
1422
1423         spin_unlock_bh(&x->lock);
1424         xfrm_state_put(x);
1425         return 0;
1426 }
1427
1428 static inline int event2poltype(int event)
1429 {
1430         switch (event) {
1431         case XFRM_MSG_DELPOLICY:
1432                 return SADB_X_SPDDELETE;
1433         case XFRM_MSG_NEWPOLICY:
1434                 return SADB_X_SPDADD;
1435         case XFRM_MSG_UPDPOLICY:
1436                 return SADB_X_SPDUPDATE;
1437         case XFRM_MSG_POLEXPIRE:
1438         //      return SADB_X_SPDEXPIRE;
1439         default:
1440                 pr_err("pfkey: Unknown policy event %d\n", event);
1441                 break;
1442         }
1443
1444         return 0;
1445 }
1446
1447 static inline int event2keytype(int event)
1448 {
1449         switch (event) {
1450         case XFRM_MSG_DELSA:
1451                 return SADB_DELETE;
1452         case XFRM_MSG_NEWSA:
1453                 return SADB_ADD;
1454         case XFRM_MSG_UPDSA:
1455                 return SADB_UPDATE;
1456         case XFRM_MSG_EXPIRE:
1457                 return SADB_EXPIRE;
1458         default:
1459                 pr_err("pfkey: Unknown SA event %d\n", event);
1460                 break;
1461         }
1462
1463         return 0;
1464 }
1465
1466 /* ADD/UPD/DEL */
1467 static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
1468 {
1469         struct sk_buff *skb;
1470         struct sadb_msg *hdr;
1471
1472         skb = pfkey_xfrm_state2msg(x);
1473
1474         if (IS_ERR(skb))
1475                 return PTR_ERR(skb);
1476
1477         hdr = (struct sadb_msg *) skb->data;
1478         hdr->sadb_msg_version = PF_KEY_V2;
1479         hdr->sadb_msg_type = event2keytype(c->event);
1480         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1481         hdr->sadb_msg_errno = 0;
1482         hdr->sadb_msg_reserved = 0;
1483         hdr->sadb_msg_seq = c->seq;
1484         hdr->sadb_msg_pid = c->portid;
1485
1486         pfkey_broadcast(skb, BROADCAST_ALL, NULL, xs_net(x));
1487
1488         return 0;
1489 }
1490
1491 static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1492 {
1493         struct net *net = sock_net(sk);
1494         struct xfrm_state *x;
1495         int err;
1496         struct km_event c;
1497
1498         x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1499         if (IS_ERR(x))
1500                 return PTR_ERR(x);
1501
1502         xfrm_state_hold(x);
1503         if (hdr->sadb_msg_type == SADB_ADD)
1504                 err = xfrm_state_add(x);
1505         else
1506                 err = xfrm_state_update(x);
1507
1508         xfrm_audit_state_add(x, err ? 0 : 1, true);
1509
1510         if (err < 0) {
1511                 x->km.state = XFRM_STATE_DEAD;
1512                 __xfrm_state_put(x);
1513                 goto out;
1514         }
1515
1516         if (hdr->sadb_msg_type == SADB_ADD)
1517                 c.event = XFRM_MSG_NEWSA;
1518         else
1519                 c.event = XFRM_MSG_UPDSA;
1520         c.seq = hdr->sadb_msg_seq;
1521         c.portid = hdr->sadb_msg_pid;
1522         km_state_notify(x, &c);
1523 out:
1524         xfrm_state_put(x);
1525         return err;
1526 }
1527
1528 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1529 {
1530         struct net *net = sock_net(sk);
1531         struct xfrm_state *x;
1532         struct km_event c;
1533         int err;
1534
1535         if (!ext_hdrs[SADB_EXT_SA-1] ||
1536             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1537                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1538                 return -EINVAL;
1539
1540         x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1541         if (x == NULL)
1542                 return -ESRCH;
1543
1544         if ((err = security_xfrm_state_delete(x)))
1545                 goto out;
1546
1547         if (xfrm_state_kern(x)) {
1548                 err = -EPERM;
1549                 goto out;
1550         }
1551
1552         err = xfrm_state_delete(x);
1553
1554         if (err < 0)
1555                 goto out;
1556
1557         c.seq = hdr->sadb_msg_seq;
1558         c.portid = hdr->sadb_msg_pid;
1559         c.event = XFRM_MSG_DELSA;
1560         km_state_notify(x, &c);
1561 out:
1562         xfrm_audit_state_delete(x, err ? 0 : 1, true);
1563         xfrm_state_put(x);
1564
1565         return err;
1566 }
1567
1568 static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1569 {
1570         struct net *net = sock_net(sk);
1571         __u8 proto;
1572         struct sk_buff *out_skb;
1573         struct sadb_msg *out_hdr;
1574         struct xfrm_state *x;
1575
1576         if (!ext_hdrs[SADB_EXT_SA-1] ||
1577             !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1578                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1579                 return -EINVAL;
1580
1581         x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1582         if (x == NULL)
1583                 return -ESRCH;
1584
1585         out_skb = pfkey_xfrm_state2msg(x);
1586         proto = x->id.proto;
1587         xfrm_state_put(x);
1588         if (IS_ERR(out_skb))
1589                 return  PTR_ERR(out_skb);
1590
1591         out_hdr = (struct sadb_msg *) out_skb->data;
1592         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1593         out_hdr->sadb_msg_type = SADB_GET;
1594         out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1595         out_hdr->sadb_msg_errno = 0;
1596         out_hdr->sadb_msg_reserved = 0;
1597         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1598         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1599         pfkey_broadcast(out_skb, BROADCAST_ONE, sk, sock_net(sk));
1600
1601         return 0;
1602 }
1603
1604 static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
1605                                               gfp_t allocation)
1606 {
1607         struct sk_buff *skb;
1608         struct sadb_msg *hdr;
1609         int len, auth_len, enc_len, i;
1610
1611         auth_len = xfrm_count_pfkey_auth_supported();
1612         if (auth_len) {
1613                 auth_len *= sizeof(struct sadb_alg);
1614                 auth_len += sizeof(struct sadb_supported);
1615         }
1616
1617         enc_len = xfrm_count_pfkey_enc_supported();
1618         if (enc_len) {
1619                 enc_len *= sizeof(struct sadb_alg);
1620                 enc_len += sizeof(struct sadb_supported);
1621         }
1622
1623         len = enc_len + auth_len + sizeof(struct sadb_msg);
1624
1625         skb = alloc_skb(len + 16, allocation);
1626         if (!skb)
1627                 goto out_put_algs;
1628
1629         hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1630         pfkey_hdr_dup(hdr, orig);
1631         hdr->sadb_msg_errno = 0;
1632         hdr->sadb_msg_len = len / sizeof(uint64_t);
1633
1634         if (auth_len) {
1635                 struct sadb_supported *sp;
1636                 struct sadb_alg *ap;
1637
1638                 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1639                 ap = (struct sadb_alg *) (sp + 1);
1640
1641                 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1642                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1643
1644                 for (i = 0; ; i++) {
1645                         struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1646                         if (!aalg)
1647                                 break;
1648                         if (!aalg->pfkey_supported)
1649                                 continue;
1650                         if (aalg->available)
1651                                 *ap++ = aalg->desc;
1652                 }
1653         }
1654
1655         if (enc_len) {
1656                 struct sadb_supported *sp;
1657                 struct sadb_alg *ap;
1658
1659                 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1660                 ap = (struct sadb_alg *) (sp + 1);
1661
1662                 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1663                 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1664
1665                 for (i = 0; ; i++) {
1666                         struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1667                         if (!ealg)
1668                                 break;
1669                         if (!ealg->pfkey_supported)
1670                                 continue;
1671                         if (ealg->available)
1672                                 *ap++ = ealg->desc;
1673                 }
1674         }
1675
1676 out_put_algs:
1677         return skb;
1678 }
1679
1680 static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1681 {
1682         struct pfkey_sock *pfk = pfkey_sk(sk);
1683         struct sk_buff *supp_skb;
1684
1685         if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1686                 return -EINVAL;
1687
1688         if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1689                 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1690                         return -EEXIST;
1691                 pfk->registered |= (1<<hdr->sadb_msg_satype);
1692         }
1693
1694         xfrm_probe_algs();
1695
1696         supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1697         if (!supp_skb) {
1698                 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1699                         pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1700
1701                 return -ENOBUFS;
1702         }
1703
1704         pfkey_broadcast(supp_skb, BROADCAST_REGISTERED, sk, sock_net(sk));
1705
1706         return 0;
1707 }
1708
1709 static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
1710 {
1711         struct sk_buff *skb;
1712         struct sadb_msg *hdr;
1713
1714         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1715         if (!skb)
1716                 return -ENOBUFS;
1717
1718         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1719         memcpy(hdr, ihdr, sizeof(struct sadb_msg));
1720         hdr->sadb_msg_errno = (uint8_t) 0;
1721         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1722
1723         return pfkey_broadcast(skb, BROADCAST_ONE, sk, sock_net(sk));
1724 }
1725
1726 static int key_notify_sa_flush(const struct km_event *c)
1727 {
1728         struct sk_buff *skb;
1729         struct sadb_msg *hdr;
1730
1731         skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1732         if (!skb)
1733                 return -ENOBUFS;
1734         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1735         hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1736         hdr->sadb_msg_type = SADB_FLUSH;
1737         hdr->sadb_msg_seq = c->seq;
1738         hdr->sadb_msg_pid = c->portid;
1739         hdr->sadb_msg_version = PF_KEY_V2;
1740         hdr->sadb_msg_errno = (uint8_t) 0;
1741         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1742         hdr->sadb_msg_reserved = 0;
1743
1744         pfkey_broadcast(skb, BROADCAST_ALL, NULL, c->net);
1745
1746         return 0;
1747 }
1748
1749 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1750 {
1751         struct net *net = sock_net(sk);
1752         unsigned int proto;
1753         struct km_event c;
1754         int err, err2;
1755
1756         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1757         if (proto == 0)
1758                 return -EINVAL;
1759
1760         err = xfrm_state_flush(net, proto, true);
1761         err2 = unicast_flush_resp(sk, hdr);
1762         if (err || err2) {
1763                 if (err == -ESRCH) /* empty table - go quietly */
1764                         err = 0;
1765                 return err ? err : err2;
1766         }
1767
1768         c.data.proto = proto;
1769         c.seq = hdr->sadb_msg_seq;
1770         c.portid = hdr->sadb_msg_pid;
1771         c.event = XFRM_MSG_FLUSHSA;
1772         c.net = net;
1773         km_state_notify(NULL, &c);
1774
1775         return 0;
1776 }
1777
1778 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1779 {
1780         struct pfkey_sock *pfk = ptr;
1781         struct sk_buff *out_skb;
1782         struct sadb_msg *out_hdr;
1783
1784         if (!pfkey_can_dump(&pfk->sk))
1785                 return -ENOBUFS;
1786
1787         out_skb = pfkey_xfrm_state2msg(x);
1788         if (IS_ERR(out_skb))
1789                 return PTR_ERR(out_skb);
1790
1791         out_hdr = (struct sadb_msg *) out_skb->data;
1792         out_hdr->sadb_msg_version = pfk->dump.msg_version;
1793         out_hdr->sadb_msg_type = SADB_DUMP;
1794         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1795         out_hdr->sadb_msg_errno = 0;
1796         out_hdr->sadb_msg_reserved = 0;
1797         out_hdr->sadb_msg_seq = count + 1;
1798         out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
1799
1800         if (pfk->dump.skb)
1801                 pfkey_broadcast(pfk->dump.skb, BROADCAST_ONE,
1802                                 &pfk->sk, sock_net(&pfk->sk));
1803         pfk->dump.skb = out_skb;
1804
1805         return 0;
1806 }
1807
1808 static int pfkey_dump_sa(struct pfkey_sock *pfk)
1809 {
1810         struct net *net = sock_net(&pfk->sk);
1811         return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1812 }
1813
1814 static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1815 {
1816         struct net *net = sock_net(&pfk->sk);
1817
1818         xfrm_state_walk_done(&pfk->dump.u.state, net);
1819 }
1820
1821 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1822 {
1823         u8 proto;
1824         struct xfrm_address_filter *filter = NULL;
1825         struct pfkey_sock *pfk = pfkey_sk(sk);
1826
1827         mutex_lock(&pfk->dump_lock);
1828         if (pfk->dump.dump != NULL) {
1829                 mutex_unlock(&pfk->dump_lock);
1830                 return -EBUSY;
1831         }
1832
1833         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1834         if (proto == 0) {
1835                 mutex_unlock(&pfk->dump_lock);
1836                 return -EINVAL;
1837         }
1838
1839         if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
1840                 struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
1841
1842                 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
1843                 if (filter == NULL) {
1844                         mutex_unlock(&pfk->dump_lock);
1845                         return -ENOMEM;
1846                 }
1847
1848                 memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr,
1849                        sizeof(xfrm_address_t));
1850                 memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr,
1851                        sizeof(xfrm_address_t));
1852                 filter->family = xfilter->sadb_x_filter_family;
1853                 filter->splen = xfilter->sadb_x_filter_splen;
1854                 filter->dplen = xfilter->sadb_x_filter_dplen;
1855         }
1856
1857         pfk->dump.msg_version = hdr->sadb_msg_version;
1858         pfk->dump.msg_portid = hdr->sadb_msg_pid;
1859         pfk->dump.dump = pfkey_dump_sa;
1860         pfk->dump.done = pfkey_dump_sa_done;
1861         xfrm_state_walk_init(&pfk->dump.u.state, proto, filter);
1862         mutex_unlock(&pfk->dump_lock);
1863
1864         return pfkey_do_dump(pfk);
1865 }
1866
1867 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1868 {
1869         struct pfkey_sock *pfk = pfkey_sk(sk);
1870         int satype = hdr->sadb_msg_satype;
1871         bool reset_errno = false;
1872
1873         if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1874                 reset_errno = true;
1875                 if (satype != 0 && satype != 1)
1876                         return -EINVAL;
1877                 pfk->promisc = satype;
1878         }
1879         if (reset_errno && skb_cloned(skb))
1880                 skb = skb_copy(skb, GFP_KERNEL);
1881         else
1882                 skb = skb_clone(skb, GFP_KERNEL);
1883
1884         if (reset_errno && skb) {
1885                 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1886                 new_hdr->sadb_msg_errno = 0;
1887         }
1888
1889         pfkey_broadcast(skb, BROADCAST_ALL, NULL, sock_net(sk));
1890         return 0;
1891 }
1892
1893 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1894 {
1895         int i;
1896         u32 reqid = *(u32*)ptr;
1897
1898         for (i=0; i<xp->xfrm_nr; i++) {
1899                 if (xp->xfrm_vec[i].reqid == reqid)
1900                         return -EEXIST;
1901         }
1902         return 0;
1903 }
1904
1905 static u32 gen_reqid(struct net *net)
1906 {
1907         struct xfrm_policy_walk walk;
1908         u32 start;
1909         int rc;
1910         static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1911
1912         start = reqid;
1913         do {
1914                 ++reqid;
1915                 if (reqid == 0)
1916                         reqid = IPSEC_MANUAL_REQID_MAX+1;
1917                 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1918                 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1919                 xfrm_policy_walk_done(&walk, net);
1920                 if (rc != -EEXIST)
1921                         return reqid;
1922         } while (reqid != start);
1923         return 0;
1924 }
1925
1926 static int
1927 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1928 {
1929         struct net *net = xp_net(xp);
1930         struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1931         int mode;
1932
1933         if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1934                 return -ELOOP;
1935
1936         if (rq->sadb_x_ipsecrequest_mode == 0)
1937                 return -EINVAL;
1938
1939         t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1940         if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1941                 return -EINVAL;
1942         t->mode = mode;
1943         if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1944                 t->optional = 1;
1945         else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1946                 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1947                 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1948                         t->reqid = 0;
1949                 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1950                         return -ENOBUFS;
1951         }
1952
1953         /* addresses present only in tunnel mode */
1954         if (t->mode == XFRM_MODE_TUNNEL) {
1955                 int err;
1956
1957                 err = parse_sockaddr_pair(
1958                         (struct sockaddr *)(rq + 1),
1959                         rq->sadb_x_ipsecrequest_len - sizeof(*rq),
1960                         &t->saddr, &t->id.daddr, &t->encap_family);
1961                 if (err)
1962                         return err;
1963         } else
1964                 t->encap_family = xp->family;
1965
1966         /* No way to set this via kame pfkey */
1967         t->allalgs = 1;
1968         xp->xfrm_nr++;
1969         return 0;
1970 }
1971
1972 static int
1973 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1974 {
1975         int err;
1976         int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1977         struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1978
1979         if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
1980                 return -EINVAL;
1981
1982         while (len >= sizeof(*rq)) {
1983                 if (len < rq->sadb_x_ipsecrequest_len ||
1984                     rq->sadb_x_ipsecrequest_len < sizeof(*rq))
1985                         return -EINVAL;
1986
1987                 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1988                         return err;
1989                 len -= rq->sadb_x_ipsecrequest_len;
1990                 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1991         }
1992         return 0;
1993 }
1994
1995 static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
1996 {
1997   struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1998
1999         if (xfrm_ctx) {
2000                 int len = sizeof(struct sadb_x_sec_ctx);
2001                 len += xfrm_ctx->ctx_len;
2002                 return PFKEY_ALIGN8(len);
2003         }
2004         return 0;
2005 }
2006
2007 static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
2008 {
2009         const struct xfrm_tmpl *t;
2010         int sockaddr_size = pfkey_sockaddr_size(xp->family);
2011         int socklen = 0;
2012         int i;
2013
2014         for (i=0; i<xp->xfrm_nr; i++) {
2015                 t = xp->xfrm_vec + i;
2016                 socklen += pfkey_sockaddr_len(t->encap_family);
2017         }
2018
2019         return sizeof(struct sadb_msg) +
2020                 (sizeof(struct sadb_lifetime) * 3) +
2021                 (sizeof(struct sadb_address) * 2) +
2022                 (sockaddr_size * 2) +
2023                 sizeof(struct sadb_x_policy) +
2024                 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
2025                 (socklen * 2) +
2026                 pfkey_xfrm_policy2sec_ctx_size(xp);
2027 }
2028
2029 static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
2030 {
2031         struct sk_buff *skb;
2032         int size;
2033
2034         size = pfkey_xfrm_policy2msg_size(xp);
2035
2036         skb =  alloc_skb(size + 16, GFP_ATOMIC);
2037         if (skb == NULL)
2038                 return ERR_PTR(-ENOBUFS);
2039
2040         return skb;
2041 }
2042
2043 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
2044 {
2045         struct sadb_msg *hdr;
2046         struct sadb_address *addr;
2047         struct sadb_lifetime *lifetime;
2048         struct sadb_x_policy *pol;
2049         struct sadb_x_sec_ctx *sec_ctx;
2050         struct xfrm_sec_ctx *xfrm_ctx;
2051         int i;
2052         int size;
2053         int sockaddr_size = pfkey_sockaddr_size(xp->family);
2054         int socklen = pfkey_sockaddr_len(xp->family);
2055
2056         size = pfkey_xfrm_policy2msg_size(xp);
2057
2058         /* call should fill header later */
2059         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2060         memset(hdr, 0, size);   /* XXX do we need this ? */
2061
2062         /* src address */
2063         addr = (struct sadb_address*) skb_put(skb,
2064                                               sizeof(struct sadb_address)+sockaddr_size);
2065         addr->sadb_address_len =
2066                 (sizeof(struct sadb_address)+sockaddr_size)/
2067                         sizeof(uint64_t);
2068         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2069         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2070         addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2071         addr->sadb_address_reserved = 0;
2072         if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2073                                  xp->selector.sport,
2074                                  (struct sockaddr *) (addr + 1),
2075                                  xp->family))
2076                 BUG();
2077
2078         /* dst address */
2079         addr = (struct sadb_address*) skb_put(skb,
2080                                               sizeof(struct sadb_address)+sockaddr_size);
2081         addr->sadb_address_len =
2082                 (sizeof(struct sadb_address)+sockaddr_size)/
2083                         sizeof(uint64_t);
2084         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2085         addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2086         addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2087         addr->sadb_address_reserved = 0;
2088
2089         pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2090                             (struct sockaddr *) (addr + 1),
2091                             xp->family);
2092
2093         /* hard time */
2094         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2095                                                      sizeof(struct sadb_lifetime));
2096         lifetime->sadb_lifetime_len =
2097                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2098         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2099         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.hard_packet_limit);
2100         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2101         lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2102         lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2103         /* soft time */
2104         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2105                                                      sizeof(struct sadb_lifetime));
2106         lifetime->sadb_lifetime_len =
2107                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2108         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2109         lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.soft_packet_limit);
2110         lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2111         lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2112         lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2113         /* current time */
2114         lifetime = (struct sadb_lifetime *)  skb_put(skb,
2115                                                      sizeof(struct sadb_lifetime));
2116         lifetime->sadb_lifetime_len =
2117                 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2118         lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2119         lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2120         lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2121         lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2122         lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2123
2124         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
2125         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2126         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2127         pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2128         if (xp->action == XFRM_POLICY_ALLOW) {
2129                 if (xp->xfrm_nr)
2130                         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2131                 else
2132                         pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2133         }
2134         pol->sadb_x_policy_dir = dir+1;
2135         pol->sadb_x_policy_reserved = 0;
2136         pol->sadb_x_policy_id = xp->index;
2137         pol->sadb_x_policy_priority = xp->priority;
2138
2139         for (i=0; i<xp->xfrm_nr; i++) {
2140                 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
2141                 struct sadb_x_ipsecrequest *rq;
2142                 int req_size;
2143                 int mode;
2144
2145                 req_size = sizeof(struct sadb_x_ipsecrequest);
2146                 if (t->mode == XFRM_MODE_TUNNEL) {
2147                         socklen = pfkey_sockaddr_len(t->encap_family);
2148                         req_size += socklen * 2;
2149                 } else {
2150                         size -= 2*socklen;
2151                 }
2152                 rq = (void*)skb_put(skb, req_size);
2153                 pol->sadb_x_policy_len += req_size/8;
2154                 memset(rq, 0, sizeof(*rq));
2155                 rq->sadb_x_ipsecrequest_len = req_size;
2156                 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2157                 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2158                         return -EINVAL;
2159                 rq->sadb_x_ipsecrequest_mode = mode;
2160                 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2161                 if (t->reqid)
2162                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2163                 if (t->optional)
2164                         rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2165                 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2166
2167                 if (t->mode == XFRM_MODE_TUNNEL) {
2168                         u8 *sa = (void *)(rq + 1);
2169                         pfkey_sockaddr_fill(&t->saddr, 0,
2170                                             (struct sockaddr *)sa,
2171                                             t->encap_family);
2172                         pfkey_sockaddr_fill(&t->id.daddr, 0,
2173                                             (struct sockaddr *) (sa + socklen),
2174                                             t->encap_family);
2175                 }
2176         }
2177
2178         /* security context */
2179         if ((xfrm_ctx = xp->security)) {
2180                 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2181
2182                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2183                 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2184                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2185                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2186                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2187                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2188                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2189                        xfrm_ctx->ctx_len);
2190         }
2191
2192         hdr->sadb_msg_len = size / sizeof(uint64_t);
2193         hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2194
2195         return 0;
2196 }
2197
2198 static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2199 {
2200         struct sk_buff *out_skb;
2201         struct sadb_msg *out_hdr;
2202         int err;
2203
2204         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2205         if (IS_ERR(out_skb))
2206                 return PTR_ERR(out_skb);
2207
2208         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2209         if (err < 0)
2210                 return err;
2211
2212         out_hdr = (struct sadb_msg *) out_skb->data;
2213         out_hdr->sadb_msg_version = PF_KEY_V2;
2214
2215         if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2216                 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2217         else
2218                 out_hdr->sadb_msg_type = event2poltype(c->event);
2219         out_hdr->sadb_msg_errno = 0;
2220         out_hdr->sadb_msg_seq = c->seq;
2221         out_hdr->sadb_msg_pid = c->portid;
2222         pfkey_broadcast(out_skb, BROADCAST_ALL, NULL, xp_net(xp));
2223         return 0;
2224
2225 }
2226
2227 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2228 {
2229         struct net *net = sock_net(sk);
2230         int err = 0;
2231         struct sadb_lifetime *lifetime;
2232         struct sadb_address *sa;
2233         struct sadb_x_policy *pol;
2234         struct xfrm_policy *xp;
2235         struct km_event c;
2236         struct sadb_x_sec_ctx *sec_ctx;
2237
2238         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2239                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2240             !ext_hdrs[SADB_X_EXT_POLICY-1])
2241                 return -EINVAL;
2242
2243         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2244         if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2245                 return -EINVAL;
2246         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2247                 return -EINVAL;
2248
2249         xp = xfrm_policy_alloc(net, GFP_KERNEL);
2250         if (xp == NULL)
2251                 return -ENOBUFS;
2252
2253         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2254                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2255         xp->priority = pol->sadb_x_policy_priority;
2256
2257         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2258         xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2259         xp->selector.family = xp->family;
2260         xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2261         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2262         xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2263         if (xp->selector.sport)
2264                 xp->selector.sport_mask = htons(0xffff);
2265
2266         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2267         pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2268         xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2269
2270         /* Amusing, we set this twice.  KAME apps appear to set same value
2271          * in both addresses.
2272          */
2273         xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2274
2275         xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2276         if (xp->selector.dport)
2277                 xp->selector.dport_mask = htons(0xffff);
2278
2279         sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2280         if (sec_ctx != NULL) {
2281                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2282
2283                 if (!uctx) {
2284                         err = -ENOBUFS;
2285                         goto out;
2286                 }
2287
2288                 err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL);
2289                 kfree(uctx);
2290
2291                 if (err)
2292                         goto out;
2293         }
2294
2295         xp->lft.soft_byte_limit = XFRM_INF;
2296         xp->lft.hard_byte_limit = XFRM_INF;
2297         xp->lft.soft_packet_limit = XFRM_INF;
2298         xp->lft.hard_packet_limit = XFRM_INF;
2299         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2300                 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2301                 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2302                 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2303                 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2304         }
2305         if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2306                 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2307                 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2308                 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2309                 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2310         }
2311         xp->xfrm_nr = 0;
2312         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2313             (err = parse_ipsecrequests(xp, pol)) < 0)
2314                 goto out;
2315
2316         err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2317                                  hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2318
2319         xfrm_audit_policy_add(xp, err ? 0 : 1, true);
2320
2321         if (err)
2322                 goto out;
2323
2324         if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2325                 c.event = XFRM_MSG_UPDPOLICY;
2326         else
2327                 c.event = XFRM_MSG_NEWPOLICY;
2328
2329         c.seq = hdr->sadb_msg_seq;
2330         c.portid = hdr->sadb_msg_pid;
2331
2332         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2333         xfrm_pol_put(xp);
2334         return 0;
2335
2336 out:
2337         xp->walk.dead = 1;
2338         xfrm_policy_destroy(xp);
2339         return err;
2340 }
2341
2342 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2343 {
2344         struct net *net = sock_net(sk);
2345         int err;
2346         struct sadb_address *sa;
2347         struct sadb_x_policy *pol;
2348         struct xfrm_policy *xp;
2349         struct xfrm_selector sel;
2350         struct km_event c;
2351         struct sadb_x_sec_ctx *sec_ctx;
2352         struct xfrm_sec_ctx *pol_ctx = NULL;
2353
2354         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2355                                      ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2356             !ext_hdrs[SADB_X_EXT_POLICY-1])
2357                 return -EINVAL;
2358
2359         pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2360         if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2361                 return -EINVAL;
2362
2363         memset(&sel, 0, sizeof(sel));
2364
2365         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
2366         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2367         sel.prefixlen_s = sa->sadb_address_prefixlen;
2368         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2369         sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2370         if (sel.sport)
2371                 sel.sport_mask = htons(0xffff);
2372
2373         sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
2374         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2375         sel.prefixlen_d = sa->sadb_address_prefixlen;
2376         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2377         sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2378         if (sel.dport)
2379                 sel.dport_mask = htons(0xffff);
2380
2381         sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
2382         if (sec_ctx != NULL) {
2383                 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
2384
2385                 if (!uctx)
2386                         return -ENOMEM;
2387
2388                 err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL);
2389                 kfree(uctx);
2390                 if (err)
2391                         return err;
2392         }
2393
2394         xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2395                                    pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2396                                    1, &err);
2397         security_xfrm_policy_free(pol_ctx);
2398         if (xp == NULL)
2399                 return -ENOENT;
2400
2401         xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2402
2403         if (err)
2404                 goto out;
2405
2406         c.seq = hdr->sadb_msg_seq;
2407         c.portid = hdr->sadb_msg_pid;
2408         c.data.byid = 0;
2409         c.event = XFRM_MSG_DELPOLICY;
2410         km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2411
2412 out:
2413         xfrm_pol_put(xp);
2414         if (err == 0)
2415                 xfrm_garbage_collect(net);
2416         return err;
2417 }
2418
2419 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
2420 {
2421         int err;
2422         struct sk_buff *out_skb;
2423         struct sadb_msg *out_hdr;
2424         err = 0;
2425
2426         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2427         if (IS_ERR(out_skb)) {
2428                 err =  PTR_ERR(out_skb);
2429                 goto out;
2430         }
2431         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2432         if (err < 0)
2433                 goto out;
2434
2435         out_hdr = (struct sadb_msg *) out_skb->data;
2436         out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2437         out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2438         out_hdr->sadb_msg_satype = 0;
2439         out_hdr->sadb_msg_errno = 0;
2440         out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2441         out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2442         pfkey_broadcast(out_skb, BROADCAST_ONE, sk, xp_net(xp));
2443         err = 0;
2444
2445 out:
2446         return err;
2447 }
2448
2449 static int pfkey_sockaddr_pair_size(sa_family_t family)
2450 {
2451         return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2452 }
2453
2454 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2455                                xfrm_address_t *saddr, xfrm_address_t *daddr,
2456                                u16 *family)
2457 {
2458         int af, socklen;
2459
2460         if (ext_len < 2 || ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2461                 return -EINVAL;
2462
2463         af = pfkey_sockaddr_extract(sa, saddr);
2464         if (!af)
2465                 return -EINVAL;
2466
2467         socklen = pfkey_sockaddr_len(af);
2468         if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2469                                    daddr) != af)
2470                 return -EINVAL;
2471
2472         *family = af;
2473         return 0;
2474 }
2475
2476 #ifdef CONFIG_NET_KEY_MIGRATE
2477 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2478                                     struct xfrm_migrate *m)
2479 {
2480         int err;
2481         struct sadb_x_ipsecrequest *rq2;
2482         int mode;
2483
2484         if (len < sizeof(*rq1) ||
2485             len < rq1->sadb_x_ipsecrequest_len ||
2486             rq1->sadb_x_ipsecrequest_len < sizeof(*rq1))
2487                 return -EINVAL;
2488
2489         /* old endoints */
2490         err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2491                                   rq1->sadb_x_ipsecrequest_len - sizeof(*rq1),
2492                                   &m->old_saddr, &m->old_daddr,
2493                                   &m->old_family);
2494         if (err)
2495                 return err;
2496
2497         rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2498         len -= rq1->sadb_x_ipsecrequest_len;
2499
2500         if (len <= sizeof(*rq2) ||
2501             len < rq2->sadb_x_ipsecrequest_len ||
2502             rq2->sadb_x_ipsecrequest_len < sizeof(*rq2))
2503                 return -EINVAL;
2504
2505         /* new endpoints */
2506         err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2507                                   rq2->sadb_x_ipsecrequest_len - sizeof(*rq2),
2508                                   &m->new_saddr, &m->new_daddr,
2509                                   &m->new_family);
2510         if (err)
2511                 return err;
2512
2513         if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2514             rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2515             rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2516                 return -EINVAL;
2517
2518         m->proto = rq1->sadb_x_ipsecrequest_proto;
2519         if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2520                 return -EINVAL;
2521         m->mode = mode;
2522         m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2523
2524         return ((int)(rq1->sadb_x_ipsecrequest_len +
2525                       rq2->sadb_x_ipsecrequest_len));
2526 }
2527
2528 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2529                          const struct sadb_msg *hdr, void * const *ext_hdrs)
2530 {
2531         int i, len, ret, err = -EINVAL;
2532         u8 dir;
2533         struct sadb_address *sa;
2534         struct sadb_x_kmaddress *kma;
2535         struct sadb_x_policy *pol;
2536         struct sadb_x_ipsecrequest *rq;
2537         struct xfrm_selector sel;
2538         struct xfrm_migrate m[XFRM_MAX_DEPTH];
2539         struct xfrm_kmaddress k;
2540         struct net *net = sock_net(sk);
2541
2542         if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2543                                      ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2544             !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2545                 err = -EINVAL;
2546                 goto out;
2547         }
2548
2549         kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2550         pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2551
2552         if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2553                 err = -EINVAL;
2554                 goto out;
2555         }
2556
2557         if (kma) {
2558                 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2559                 k.reserved = kma->sadb_x_kmaddress_reserved;
2560                 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2561                                           8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2562                                           &k.local, &k.remote, &k.family);
2563                 if (ret < 0) {
2564                         err = ret;
2565                         goto out;
2566                 }
2567         }
2568
2569         dir = pol->sadb_x_policy_dir - 1;
2570         memset(&sel, 0, sizeof(sel));
2571
2572         /* set source address info of selector */
2573         sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2574         sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2575         sel.prefixlen_s = sa->sadb_address_prefixlen;
2576         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2577         sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2578         if (sel.sport)
2579                 sel.sport_mask = htons(0xffff);
2580
2581         /* set destination address info of selector */
2582         sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
2583         pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2584         sel.prefixlen_d = sa->sadb_address_prefixlen;
2585         sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2586         sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2587         if (sel.dport)
2588                 sel.dport_mask = htons(0xffff);
2589
2590         rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2591
2592         /* extract ipsecrequests */
2593         i = 0;
2594         len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2595
2596         while (len > 0 && i < XFRM_MAX_DEPTH) {
2597                 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2598                 if (ret < 0) {
2599                         err = ret;
2600                         goto out;
2601                 } else {
2602                         rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2603                         len -= ret;
2604                         i++;
2605                 }
2606         }
2607
2608         if (!i || len > 0) {
2609                 err = -EINVAL;
2610                 goto out;
2611         }
2612
2613         return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2614                             kma ? &k : NULL, net);
2615
2616  out:
2617         return err;
2618 }
2619 #else
2620 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2621                          const struct sadb_msg *hdr, void * const *ext_hdrs)
2622 {
2623         return -ENOPROTOOPT;
2624 }
2625 #endif
2626
2627
2628 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2629 {
2630         struct net *net = sock_net(sk);
2631         unsigned int dir;
2632         int err = 0, delete;
2633         struct sadb_x_policy *pol;
2634         struct xfrm_policy *xp;
2635         struct km_event c;
2636
2637         if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2638                 return -EINVAL;
2639
2640         dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2641         if (dir >= XFRM_POLICY_MAX)
2642                 return -EINVAL;
2643
2644         delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2645         xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2646                               dir, pol->sadb_x_policy_id, delete, &err);
2647         if (xp == NULL)
2648                 return -ENOENT;
2649
2650         if (delete) {
2651                 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2652
2653                 if (err)
2654                         goto out;
2655                 c.seq = hdr->sadb_msg_seq;
2656                 c.portid = hdr->sadb_msg_pid;
2657                 c.data.byid = 1;
2658                 c.event = XFRM_MSG_DELPOLICY;
2659                 km_policy_notify(xp, dir, &c);
2660         } else {
2661                 err = key_pol_get_resp(sk, xp, hdr, dir);
2662         }
2663
2664 out:
2665         xfrm_pol_put(xp);
2666         if (delete && err == 0)
2667                 xfrm_garbage_collect(net);
2668         return err;
2669 }
2670
2671 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2672 {
2673         struct pfkey_sock *pfk = ptr;
2674         struct sk_buff *out_skb;
2675         struct sadb_msg *out_hdr;
2676         int err;
2677
2678         if (!pfkey_can_dump(&pfk->sk))
2679                 return -ENOBUFS;
2680
2681         out_skb = pfkey_xfrm_policy2msg_prep(xp);
2682         if (IS_ERR(out_skb))
2683                 return PTR_ERR(out_skb);
2684
2685         err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2686         if (err < 0)
2687                 return err;
2688
2689         out_hdr = (struct sadb_msg *) out_skb->data;
2690         out_hdr->sadb_msg_version = pfk->dump.msg_version;
2691         out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2692         out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2693         out_hdr->sadb_msg_errno = 0;
2694         out_hdr->sadb_msg_seq = count + 1;
2695         out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
2696
2697         if (pfk->dump.skb)
2698                 pfkey_broadcast(pfk->dump.skb, BROADCAST_ONE,
2699                                 &pfk->sk, sock_net(&pfk->sk));
2700         pfk->dump.skb = out_skb;
2701
2702         return 0;
2703 }
2704
2705 static int pfkey_dump_sp(struct pfkey_sock *pfk)
2706 {
2707         struct net *net = sock_net(&pfk->sk);
2708         return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2709 }
2710
2711 static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2712 {
2713         struct net *net = sock_net((struct sock *)pfk);
2714
2715         xfrm_policy_walk_done(&pfk->dump.u.policy, net);
2716 }
2717
2718 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2719 {
2720         struct pfkey_sock *pfk = pfkey_sk(sk);
2721
2722         mutex_lock(&pfk->dump_lock);
2723         if (pfk->dump.dump != NULL) {
2724                 mutex_unlock(&pfk->dump_lock);
2725                 return -EBUSY;
2726         }
2727
2728         pfk->dump.msg_version = hdr->sadb_msg_version;
2729         pfk->dump.msg_portid = hdr->sadb_msg_pid;
2730         pfk->dump.dump = pfkey_dump_sp;
2731         pfk->dump.done = pfkey_dump_sp_done;
2732         xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2733         mutex_unlock(&pfk->dump_lock);
2734
2735         return pfkey_do_dump(pfk);
2736 }
2737
2738 static int key_notify_policy_flush(const struct km_event *c)
2739 {
2740         struct sk_buff *skb_out;
2741         struct sadb_msg *hdr;
2742
2743         skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2744         if (!skb_out)
2745                 return -ENOBUFS;
2746         hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2747         hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2748         hdr->sadb_msg_seq = c->seq;
2749         hdr->sadb_msg_pid = c->portid;
2750         hdr->sadb_msg_version = PF_KEY_V2;
2751         hdr->sadb_msg_errno = (uint8_t) 0;
2752         hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2753         hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2754         hdr->sadb_msg_reserved = 0;
2755         pfkey_broadcast(skb_out, BROADCAST_ALL, NULL, c->net);
2756         return 0;
2757
2758 }
2759
2760 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
2761 {
2762         struct net *net = sock_net(sk);
2763         struct km_event c;
2764         int err, err2;
2765
2766         err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, true);
2767         if (!err)
2768                 xfrm_garbage_collect(net);
2769         err2 = unicast_flush_resp(sk, hdr);
2770         if (err || err2) {
2771                 if (err == -ESRCH) /* empty table - old silent behavior */
2772                         return 0;
2773                 return err;
2774         }
2775
2776         c.data.type = XFRM_POLICY_TYPE_MAIN;
2777         c.event = XFRM_MSG_FLUSHPOLICY;
2778         c.portid = hdr->sadb_msg_pid;
2779         c.seq = hdr->sadb_msg_seq;
2780         c.net = net;
2781         km_policy_notify(NULL, 0, &c);
2782
2783         return 0;
2784 }
2785
2786 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2787                              const struct sadb_msg *hdr, void * const *ext_hdrs);
2788 static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2789         [SADB_RESERVED]         = pfkey_reserved,
2790         [SADB_GETSPI]           = pfkey_getspi,
2791         [SADB_UPDATE]           = pfkey_add,
2792         [SADB_ADD]              = pfkey_add,
2793         [SADB_DELETE]           = pfkey_delete,
2794         [SADB_GET]              = pfkey_get,
2795         [SADB_ACQUIRE]          = pfkey_acquire,
2796         [SADB_REGISTER]         = pfkey_register,
2797         [SADB_EXPIRE]           = NULL,
2798         [SADB_FLUSH]            = pfkey_flush,
2799         [SADB_DUMP]             = pfkey_dump,
2800         [SADB_X_PROMISC]        = pfkey_promisc,
2801         [SADB_X_PCHANGE]        = NULL,
2802         [SADB_X_SPDUPDATE]      = pfkey_spdadd,
2803         [SADB_X_SPDADD]         = pfkey_spdadd,
2804         [SADB_X_SPDDELETE]      = pfkey_spddelete,
2805         [SADB_X_SPDGET]         = pfkey_spdget,
2806         [SADB_X_SPDACQUIRE]     = NULL,
2807         [SADB_X_SPDDUMP]        = pfkey_spddump,
2808         [SADB_X_SPDFLUSH]       = pfkey_spdflush,
2809         [SADB_X_SPDSETIDX]      = pfkey_spdadd,
2810         [SADB_X_SPDDELETE2]     = pfkey_spdget,
2811         [SADB_X_MIGRATE]        = pfkey_migrate,
2812 };
2813
2814 static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
2815 {
2816         void *ext_hdrs[SADB_EXT_MAX];
2817         int err;
2818
2819         pfkey_broadcast(skb_clone(skb, GFP_KERNEL),
2820                         BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
2821
2822         memset(ext_hdrs, 0, sizeof(ext_hdrs));
2823         err = parse_exthdrs(skb, hdr, ext_hdrs);
2824         if (!err) {
2825                 err = -EOPNOTSUPP;
2826                 if (pfkey_funcs[hdr->sadb_msg_type])
2827                         err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2828         }
2829         return err;
2830 }
2831
2832 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2833 {
2834         struct sadb_msg *hdr = NULL;
2835
2836         if (skb->len < sizeof(*hdr)) {
2837                 *errp = -EMSGSIZE;
2838         } else {
2839                 hdr = (struct sadb_msg *) skb->data;
2840                 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2841                     hdr->sadb_msg_reserved != 0 ||
2842                     (hdr->sadb_msg_type <= SADB_RESERVED ||
2843                      hdr->sadb_msg_type > SADB_MAX)) {
2844                         hdr = NULL;
2845                         *errp = -EINVAL;
2846                 } else if (hdr->sadb_msg_len != (skb->len /
2847                                                  sizeof(uint64_t)) ||
2848                            hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2849                                                 sizeof(uint64_t))) {
2850                         hdr = NULL;
2851                         *errp = -EMSGSIZE;
2852                 } else {
2853                         *errp = 0;
2854                 }
2855         }
2856         return hdr;
2857 }
2858
2859 static inline int aalg_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->aalgos) * 8)
2865                 return 0;
2866
2867         return (t->aalgos >> id) & 1;
2868 }
2869
2870 static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2871                                 const struct xfrm_algo_desc *d)
2872 {
2873         unsigned int id = d->desc.sadb_alg_id;
2874
2875         if (id >= sizeof(t->ealgos) * 8)
2876                 return 0;
2877
2878         return (t->ealgos >> id) & 1;
2879 }
2880
2881 static int count_ah_combs(const struct xfrm_tmpl *t)
2882 {
2883         int i, sz = 0;
2884
2885         for (i = 0; ; i++) {
2886                 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2887                 if (!aalg)
2888                         break;
2889                 if (!aalg->pfkey_supported)
2890                         continue;
2891                 if (aalg_tmpl_set(t, aalg) && aalg->available)
2892                         sz += sizeof(struct sadb_comb);
2893         }
2894         return sz + sizeof(struct sadb_prop);
2895 }
2896
2897 static int count_esp_combs(const struct xfrm_tmpl *t)
2898 {
2899         int i, k, sz = 0;
2900
2901         for (i = 0; ; i++) {
2902                 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2903                 if (!ealg)
2904                         break;
2905
2906                 if (!ealg->pfkey_supported)
2907                         continue;
2908
2909                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2910                         continue;
2911
2912                 for (k = 1; ; k++) {
2913                         const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2914                         if (!aalg)
2915                                 break;
2916
2917                         if (!aalg->pfkey_supported)
2918                                 continue;
2919
2920                         if (aalg_tmpl_set(t, aalg) && aalg->available)
2921                                 sz += sizeof(struct sadb_comb);
2922                 }
2923         }
2924         return sz + sizeof(struct sadb_prop);
2925 }
2926
2927 static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2928 {
2929         struct sadb_prop *p;
2930         int i;
2931
2932         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2933         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2934         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2935         p->sadb_prop_replay = 32;
2936         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2937
2938         for (i = 0; ; i++) {
2939                 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2940                 if (!aalg)
2941                         break;
2942
2943                 if (!aalg->pfkey_supported)
2944                         continue;
2945
2946                 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2947                         struct sadb_comb *c;
2948                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2949                         memset(c, 0, sizeof(*c));
2950                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2951                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2952                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2953                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2954                         c->sadb_comb_hard_addtime = 24*60*60;
2955                         c->sadb_comb_soft_addtime = 20*60*60;
2956                         c->sadb_comb_hard_usetime = 8*60*60;
2957                         c->sadb_comb_soft_usetime = 7*60*60;
2958                 }
2959         }
2960 }
2961
2962 static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
2963 {
2964         struct sadb_prop *p;
2965         int i, k;
2966
2967         p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2968         p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2969         p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2970         p->sadb_prop_replay = 32;
2971         memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2972
2973         for (i=0; ; i++) {
2974                 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2975                 if (!ealg)
2976                         break;
2977
2978                 if (!ealg->pfkey_supported)
2979                         continue;
2980
2981                 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2982                         continue;
2983
2984                 for (k = 1; ; k++) {
2985                         struct sadb_comb *c;
2986                         const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2987                         if (!aalg)
2988                                 break;
2989                         if (!aalg->pfkey_supported)
2990                                 continue;
2991                         if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2992                                 continue;
2993                         c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2994                         memset(c, 0, sizeof(*c));
2995                         p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2996                         c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2997                         c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2998                         c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2999                         c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
3000                         c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
3001                         c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
3002                         c->sadb_comb_hard_addtime = 24*60*60;
3003                         c->sadb_comb_soft_addtime = 20*60*60;
3004                         c->sadb_comb_hard_usetime = 8*60*60;
3005                         c->sadb_comb_soft_usetime = 7*60*60;
3006                 }
3007         }
3008 }
3009
3010 static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
3011 {
3012         return 0;
3013 }
3014
3015 static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
3016 {
3017         struct sk_buff *out_skb;
3018         struct sadb_msg *out_hdr;
3019         int hard;
3020         int hsc;
3021
3022         hard = c->data.hard;
3023         if (hard)
3024                 hsc = 2;
3025         else
3026                 hsc = 1;
3027
3028         out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
3029         if (IS_ERR(out_skb))
3030                 return PTR_ERR(out_skb);
3031
3032         out_hdr = (struct sadb_msg *) out_skb->data;
3033         out_hdr->sadb_msg_version = PF_KEY_V2;
3034         out_hdr->sadb_msg_type = SADB_EXPIRE;
3035         out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3036         out_hdr->sadb_msg_errno = 0;
3037         out_hdr->sadb_msg_reserved = 0;
3038         out_hdr->sadb_msg_seq = 0;
3039         out_hdr->sadb_msg_pid = 0;
3040
3041         pfkey_broadcast(out_skb, BROADCAST_REGISTERED, NULL, xs_net(x));
3042         return 0;
3043 }
3044
3045 static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
3046 {
3047         struct net *net = x ? xs_net(x) : c->net;
3048         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3049
3050         if (atomic_read(&net_pfkey->socks_nr) == 0)
3051                 return 0;
3052
3053         switch (c->event) {
3054         case XFRM_MSG_EXPIRE:
3055                 return key_notify_sa_expire(x, c);
3056         case XFRM_MSG_DELSA:
3057         case XFRM_MSG_NEWSA:
3058         case XFRM_MSG_UPDSA:
3059                 return key_notify_sa(x, c);
3060         case XFRM_MSG_FLUSHSA:
3061                 return key_notify_sa_flush(c);
3062         case XFRM_MSG_NEWAE: /* not yet supported */
3063                 break;
3064         default:
3065                 pr_err("pfkey: Unknown SA event %d\n", c->event);
3066                 break;
3067         }
3068
3069         return 0;
3070 }
3071
3072 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3073 {
3074         if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3075                 return 0;
3076
3077         switch (c->event) {
3078         case XFRM_MSG_POLEXPIRE:
3079                 return key_notify_policy_expire(xp, c);
3080         case XFRM_MSG_DELPOLICY:
3081         case XFRM_MSG_NEWPOLICY:
3082         case XFRM_MSG_UPDPOLICY:
3083                 return key_notify_policy(xp, dir, c);
3084         case XFRM_MSG_FLUSHPOLICY:
3085                 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3086                         break;
3087                 return key_notify_policy_flush(c);
3088         default:
3089                 pr_err("pfkey: Unknown policy event %d\n", c->event);
3090                 break;
3091         }
3092
3093         return 0;
3094 }
3095
3096 static u32 get_acqseq(void)
3097 {
3098         u32 res;
3099         static atomic_t acqseq;
3100
3101         do {
3102                 res = atomic_inc_return(&acqseq);
3103         } while (!res);
3104         return res;
3105 }
3106
3107 static bool pfkey_is_alive(const struct km_event *c)
3108 {
3109         struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id);
3110         struct sock *sk;
3111         bool is_alive = false;
3112
3113         rcu_read_lock();
3114         sk_for_each_rcu(sk, &net_pfkey->table) {
3115                 if (pfkey_sk(sk)->registered) {
3116                         is_alive = true;
3117                         break;
3118                 }
3119         }
3120         rcu_read_unlock();
3121
3122         return is_alive;
3123 }
3124
3125 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
3126 {
3127         struct sk_buff *skb;
3128         struct sadb_msg *hdr;
3129         struct sadb_address *addr;
3130         struct sadb_x_policy *pol;
3131         int sockaddr_size;
3132         int size;
3133         struct sadb_x_sec_ctx *sec_ctx;
3134         struct xfrm_sec_ctx *xfrm_ctx;
3135         int ctx_size = 0;
3136
3137         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3138         if (!sockaddr_size)
3139                 return -EINVAL;
3140
3141         size = sizeof(struct sadb_msg) +
3142                 (sizeof(struct sadb_address) * 2) +
3143                 (sockaddr_size * 2) +
3144                 sizeof(struct sadb_x_policy);
3145
3146         if (x->id.proto == IPPROTO_AH)
3147                 size += count_ah_combs(t);
3148         else if (x->id.proto == IPPROTO_ESP)
3149                 size += count_esp_combs(t);
3150
3151         if ((xfrm_ctx = x->security)) {
3152                 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3153                 size +=  sizeof(struct sadb_x_sec_ctx) + ctx_size;
3154         }
3155
3156         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3157         if (skb == NULL)
3158                 return -ENOMEM;
3159
3160         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3161         hdr->sadb_msg_version = PF_KEY_V2;
3162         hdr->sadb_msg_type = SADB_ACQUIRE;
3163         hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3164         hdr->sadb_msg_len = size / sizeof(uint64_t);
3165         hdr->sadb_msg_errno = 0;
3166         hdr->sadb_msg_reserved = 0;
3167         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3168         hdr->sadb_msg_pid = 0;
3169
3170         /* src address */
3171         addr = (struct sadb_address*) skb_put(skb,
3172                                               sizeof(struct sadb_address)+sockaddr_size);
3173         addr->sadb_address_len =
3174                 (sizeof(struct sadb_address)+sockaddr_size)/
3175                         sizeof(uint64_t);
3176         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3177         addr->sadb_address_proto = 0;
3178         addr->sadb_address_reserved = 0;
3179         addr->sadb_address_prefixlen =
3180                 pfkey_sockaddr_fill(&x->props.saddr, 0,
3181                                     (struct sockaddr *) (addr + 1),
3182                                     x->props.family);
3183         if (!addr->sadb_address_prefixlen)
3184                 BUG();
3185
3186         /* dst address */
3187         addr = (struct sadb_address*) skb_put(skb,
3188                                               sizeof(struct sadb_address)+sockaddr_size);
3189         addr->sadb_address_len =
3190                 (sizeof(struct sadb_address)+sockaddr_size)/
3191                         sizeof(uint64_t);
3192         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3193         addr->sadb_address_proto = 0;
3194         addr->sadb_address_reserved = 0;
3195         addr->sadb_address_prefixlen =
3196                 pfkey_sockaddr_fill(&x->id.daddr, 0,
3197                                     (struct sockaddr *) (addr + 1),
3198                                     x->props.family);
3199         if (!addr->sadb_address_prefixlen)
3200                 BUG();
3201
3202         pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
3203         pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3204         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3205         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3206         pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
3207         pol->sadb_x_policy_reserved = 0;
3208         pol->sadb_x_policy_id = xp->index;
3209         pol->sadb_x_policy_priority = xp->priority;
3210
3211         /* Set sadb_comb's. */
3212         if (x->id.proto == IPPROTO_AH)
3213                 dump_ah_combs(skb, t);
3214         else if (x->id.proto == IPPROTO_ESP)
3215                 dump_esp_combs(skb, t);
3216
3217         /* security context */
3218         if (xfrm_ctx) {
3219                 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3220                                 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3221                 sec_ctx->sadb_x_sec_len =
3222                   (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3223                 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3224                 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3225                 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3226                 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3227                 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3228                        xfrm_ctx->ctx_len);
3229         }
3230
3231         return pfkey_broadcast(skb, BROADCAST_REGISTERED, NULL, xs_net(x));
3232 }
3233
3234 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3235                                                 u8 *data, int len, int *dir)
3236 {
3237         struct net *net = sock_net(sk);
3238         struct xfrm_policy *xp;
3239         struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3240         struct sadb_x_sec_ctx *sec_ctx;
3241
3242         switch (sk->sk_family) {
3243         case AF_INET:
3244                 if (opt != IP_IPSEC_POLICY) {
3245                         *dir = -EOPNOTSUPP;
3246                         return NULL;
3247                 }
3248                 break;
3249 #if IS_ENABLED(CONFIG_IPV6)
3250         case AF_INET6:
3251                 if (opt != IPV6_IPSEC_POLICY) {
3252                         *dir = -EOPNOTSUPP;
3253                         return NULL;
3254                 }
3255                 break;
3256 #endif
3257         default:
3258                 *dir = -EINVAL;
3259                 return NULL;
3260         }
3261
3262         *dir = -EINVAL;
3263
3264         if (len < sizeof(struct sadb_x_policy) ||
3265             pol->sadb_x_policy_len*8 > len ||
3266             pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3267             (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3268                 return NULL;
3269
3270         xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3271         if (xp == NULL) {
3272                 *dir = -ENOBUFS;
3273                 return NULL;
3274         }
3275
3276         xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3277                       XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3278
3279         xp->lft.soft_byte_limit = XFRM_INF;
3280         xp->lft.hard_byte_limit = XFRM_INF;
3281         xp->lft.soft_packet_limit = XFRM_INF;
3282         xp->lft.hard_packet_limit = XFRM_INF;
3283         xp->family = sk->sk_family;
3284
3285         xp->xfrm_nr = 0;
3286         if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3287             (*dir = parse_ipsecrequests(xp, pol)) < 0)
3288                 goto out;
3289
3290         /* security context too */
3291         if (len >= (pol->sadb_x_policy_len*8 +
3292             sizeof(struct sadb_x_sec_ctx))) {
3293                 char *p = (char *)pol;
3294                 struct xfrm_user_sec_ctx *uctx;
3295
3296                 p += pol->sadb_x_policy_len*8;
3297                 sec_ctx = (struct sadb_x_sec_ctx *)p;
3298                 if (len < pol->sadb_x_policy_len*8 +
3299                     sec_ctx->sadb_x_sec_len*8) {
3300                         *dir = -EINVAL;
3301                         goto out;
3302                 }
3303                 if ((*dir = verify_sec_ctx_len(p)))
3304                         goto out;
3305                 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC);
3306                 *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC);
3307                 kfree(uctx);
3308
3309                 if (*dir)
3310                         goto out;
3311         }
3312
3313         *dir = pol->sadb_x_policy_dir-1;
3314         return xp;
3315
3316 out:
3317         xp->walk.dead = 1;
3318         xfrm_policy_destroy(xp);
3319         return NULL;
3320 }
3321
3322 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3323 {
3324         struct sk_buff *skb;
3325         struct sadb_msg *hdr;
3326         struct sadb_sa *sa;
3327         struct sadb_address *addr;
3328         struct sadb_x_nat_t_port *n_port;
3329         int sockaddr_size;
3330         int size;
3331         __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3332         struct xfrm_encap_tmpl *natt = NULL;
3333
3334         sockaddr_size = pfkey_sockaddr_size(x->props.family);
3335         if (!sockaddr_size)
3336                 return -EINVAL;
3337
3338         if (!satype)
3339                 return -EINVAL;
3340
3341         if (!x->encap)
3342                 return -EINVAL;
3343
3344         natt = x->encap;
3345
3346         /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3347          *
3348          * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3349          * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3350          */
3351
3352         size = sizeof(struct sadb_msg) +
3353                 sizeof(struct sadb_sa) +
3354                 (sizeof(struct sadb_address) * 2) +
3355                 (sockaddr_size * 2) +
3356                 (sizeof(struct sadb_x_nat_t_port) * 2);
3357
3358         skb =  alloc_skb(size + 16, GFP_ATOMIC);
3359         if (skb == NULL)
3360                 return -ENOMEM;
3361
3362         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3363         hdr->sadb_msg_version = PF_KEY_V2;
3364         hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3365         hdr->sadb_msg_satype = satype;
3366         hdr->sadb_msg_len = size / sizeof(uint64_t);
3367         hdr->sadb_msg_errno = 0;
3368         hdr->sadb_msg_reserved = 0;
3369         hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3370         hdr->sadb_msg_pid = 0;
3371
3372         /* SA */
3373         sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3374         sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3375         sa->sadb_sa_exttype = SADB_EXT_SA;
3376         sa->sadb_sa_spi = x->id.spi;
3377         sa->sadb_sa_replay = 0;
3378         sa->sadb_sa_state = 0;
3379         sa->sadb_sa_auth = 0;
3380         sa->sadb_sa_encrypt = 0;
3381         sa->sadb_sa_flags = 0;
3382
3383         /* ADDRESS_SRC (old addr) */
3384         addr = (struct sadb_address*)
3385                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3386         addr->sadb_address_len =
3387                 (sizeof(struct sadb_address)+sockaddr_size)/
3388                         sizeof(uint64_t);
3389         addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3390         addr->sadb_address_proto = 0;
3391         addr->sadb_address_reserved = 0;
3392         addr->sadb_address_prefixlen =
3393                 pfkey_sockaddr_fill(&x->props.saddr, 0,
3394                                     (struct sockaddr *) (addr + 1),
3395                                     x->props.family);
3396         if (!addr->sadb_address_prefixlen)
3397                 BUG();
3398
3399         /* NAT_T_SPORT (old port) */
3400         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3401         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3402         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3403         n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3404         n_port->sadb_x_nat_t_port_reserved = 0;
3405
3406         /* ADDRESS_DST (new addr) */
3407         addr = (struct sadb_address*)
3408                 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3409         addr->sadb_address_len =
3410                 (sizeof(struct sadb_address)+sockaddr_size)/
3411                         sizeof(uint64_t);
3412         addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3413         addr->sadb_address_proto = 0;
3414         addr->sadb_address_reserved = 0;
3415         addr->sadb_address_prefixlen =
3416                 pfkey_sockaddr_fill(ipaddr, 0,
3417                                     (struct sockaddr *) (addr + 1),
3418                                     x->props.family);
3419         if (!addr->sadb_address_prefixlen)
3420                 BUG();
3421
3422         /* NAT_T_DPORT (new port) */
3423         n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3424         n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3425         n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3426         n_port->sadb_x_nat_t_port_port = sport;
3427         n_port->sadb_x_nat_t_port_reserved = 0;
3428
3429         return pfkey_broadcast(skb, BROADCAST_REGISTERED, NULL, xs_net(x));
3430 }
3431
3432 #ifdef CONFIG_NET_KEY_MIGRATE
3433 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3434                             const struct xfrm_selector *sel)
3435 {
3436         struct sadb_address *addr;
3437         addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3438         addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3439         addr->sadb_address_exttype = type;
3440         addr->sadb_address_proto = sel->proto;
3441         addr->sadb_address_reserved = 0;
3442
3443         switch (type) {
3444         case SADB_EXT_ADDRESS_SRC:
3445                 addr->sadb_address_prefixlen = sel->prefixlen_s;
3446                 pfkey_sockaddr_fill(&sel->saddr, 0,
3447                                     (struct sockaddr *)(addr + 1),
3448                                     sel->family);
3449                 break;
3450         case SADB_EXT_ADDRESS_DST:
3451                 addr->sadb_address_prefixlen = sel->prefixlen_d;
3452                 pfkey_sockaddr_fill(&sel->daddr, 0,
3453                                     (struct sockaddr *)(addr + 1),
3454                                     sel->family);
3455                 break;
3456         default:
3457                 return -EINVAL;
3458         }
3459
3460         return 0;
3461 }
3462
3463
3464 static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
3465 {
3466         struct sadb_x_kmaddress *kma;
3467         u8 *sa;
3468         int family = k->family;
3469         int socklen = pfkey_sockaddr_len(family);
3470         int size_req;
3471
3472         size_req = (sizeof(struct sadb_x_kmaddress) +
3473                     pfkey_sockaddr_pair_size(family));
3474
3475         kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req);
3476         memset(kma, 0, size_req);
3477         kma->sadb_x_kmaddress_len = size_req / 8;
3478         kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3479         kma->sadb_x_kmaddress_reserved = k->reserved;
3480
3481         sa = (u8 *)(kma + 1);
3482         if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3483             !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3484                 return -EINVAL;
3485
3486         return 0;
3487 }
3488
3489 static int set_ipsecrequest(struct sk_buff *skb,
3490                             uint8_t proto, uint8_t mode, int level,
3491                             uint32_t reqid, uint8_t family,
3492                             const xfrm_address_t *src, const xfrm_address_t *dst)
3493 {
3494         struct sadb_x_ipsecrequest *rq;
3495         u8 *sa;
3496         int socklen = pfkey_sockaddr_len(family);
3497         int size_req;
3498
3499         size_req = sizeof(struct sadb_x_ipsecrequest) +
3500                    pfkey_sockaddr_pair_size(family);
3501
3502         rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3503         memset(rq, 0, size_req);
3504         rq->sadb_x_ipsecrequest_len = size_req;
3505         rq->sadb_x_ipsecrequest_proto = proto;
3506         rq->sadb_x_ipsecrequest_mode = mode;
3507         rq->sadb_x_ipsecrequest_level = level;
3508         rq->sadb_x_ipsecrequest_reqid = reqid;
3509
3510         sa = (u8 *) (rq + 1);
3511         if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3512             !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3513                 return -EINVAL;
3514
3515         return 0;
3516 }
3517 #endif
3518
3519 #ifdef CONFIG_NET_KEY_MIGRATE
3520 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3521                               const struct xfrm_migrate *m, int num_bundles,
3522                               const struct xfrm_kmaddress *k)
3523 {
3524         int i;
3525         int sasize_sel;
3526         int size = 0;
3527         int size_pol = 0;
3528         struct sk_buff *skb;
3529         struct sadb_msg *hdr;
3530         struct sadb_x_policy *pol;
3531         const struct xfrm_migrate *mp;
3532
3533         if (type != XFRM_POLICY_TYPE_MAIN)
3534                 return 0;
3535
3536         if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3537                 return -EINVAL;
3538
3539         if (k != NULL) {
3540                 /* addresses for KM */
3541                 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3542                                      pfkey_sockaddr_pair_size(k->family));
3543         }
3544
3545         /* selector */
3546         sasize_sel = pfkey_sockaddr_size(sel->family);
3547         if (!sasize_sel)
3548                 return -EINVAL;
3549         size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3550
3551         /* policy info */
3552         size_pol += sizeof(struct sadb_x_policy);
3553
3554         /* ipsecrequests */
3555         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3556                 /* old locator pair */
3557                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3558                             pfkey_sockaddr_pair_size(mp->old_family);
3559                 /* new locator pair */
3560                 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3561                             pfkey_sockaddr_pair_size(mp->new_family);
3562         }
3563
3564         size += sizeof(struct sadb_msg) + size_pol;
3565
3566         /* alloc buffer */
3567         skb = alloc_skb(size, GFP_ATOMIC);
3568         if (skb == NULL)
3569                 return -ENOMEM;
3570
3571         hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3572         hdr->sadb_msg_version = PF_KEY_V2;
3573         hdr->sadb_msg_type = SADB_X_MIGRATE;
3574         hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3575         hdr->sadb_msg_len = size / 8;
3576         hdr->sadb_msg_errno = 0;
3577         hdr->sadb_msg_reserved = 0;
3578         hdr->sadb_msg_seq = 0;
3579         hdr->sadb_msg_pid = 0;
3580
3581         /* Addresses to be used by KM for negotiation, if ext is available */
3582         if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3583                 goto err;
3584
3585         /* selector src */
3586         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3587
3588         /* selector dst */
3589         set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3590
3591         /* policy information */
3592         pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3593         pol->sadb_x_policy_len = size_pol / 8;
3594         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3595         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3596         pol->sadb_x_policy_dir = dir + 1;
3597         pol->sadb_x_policy_reserved = 0;
3598         pol->sadb_x_policy_id = 0;
3599         pol->sadb_x_policy_priority = 0;
3600
3601         for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3602                 /* old ipsecrequest */
3603                 int mode = pfkey_mode_from_xfrm(mp->mode);
3604                 if (mode < 0)
3605                         goto err;
3606                 if (set_ipsecrequest(skb, mp->proto, mode,
3607                                      (mp->reqid ?  IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3608                                      mp->reqid, mp->old_family,
3609                                      &mp->old_saddr, &mp->old_daddr) < 0)
3610                         goto err;
3611
3612                 /* new ipsecrequest */
3613                 if (set_ipsecrequest(skb, mp->proto, mode,
3614                                      (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3615                                      mp->reqid, mp->new_family,
3616                                      &mp->new_saddr, &mp->new_daddr) < 0)
3617                         goto err;
3618         }
3619
3620         /* broadcast migrate message to sockets */
3621         pfkey_broadcast(skb, BROADCAST_ALL, NULL, &init_net);
3622
3623         return 0;
3624
3625 err:
3626         kfree_skb(skb);
3627         return -EINVAL;
3628 }
3629 #else
3630 static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3631                               const struct xfrm_migrate *m, int num_bundles,
3632                               const struct xfrm_kmaddress *k)
3633 {
3634         return -ENOPROTOOPT;
3635 }
3636 #endif
3637
3638 static int pfkey_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
3639 {
3640         struct sock *sk = sock->sk;
3641         struct sk_buff *skb = NULL;
3642         struct sadb_msg *hdr = NULL;
3643         int err;
3644         struct net *net = sock_net(sk);
3645
3646         err = -EOPNOTSUPP;
3647         if (msg->msg_flags & MSG_OOB)
3648                 goto out;
3649
3650         err = -EMSGSIZE;
3651         if ((unsigned int)len > sk->sk_sndbuf - 32)
3652                 goto out;
3653
3654         err = -ENOBUFS;
3655         skb = alloc_skb(len, GFP_KERNEL);
3656         if (skb == NULL)
3657                 goto out;
3658
3659         err = -EFAULT;
3660         if (memcpy_from_msg(skb_put(skb,len), msg, len))
3661                 goto out;
3662
3663         hdr = pfkey_get_base_msg(skb, &err);
3664         if (!hdr)
3665                 goto out;
3666
3667         mutex_lock(&net->xfrm.xfrm_cfg_mutex);
3668         err = pfkey_process(sk, skb, hdr);
3669         mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
3670
3671 out:
3672         if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3673                 err = 0;
3674         kfree_skb(skb);
3675
3676         return err ? : len;
3677 }
3678
3679 static int pfkey_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
3680                          int flags)
3681 {
3682         struct sock *sk = sock->sk;
3683         struct pfkey_sock *pfk = pfkey_sk(sk);
3684         struct sk_buff *skb;
3685         int copied, err;
3686
3687         err = -EINVAL;
3688         if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3689                 goto out;
3690
3691         skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3692         if (skb == NULL)
3693                 goto out;
3694
3695         copied = skb->len;
3696         if (copied > len) {
3697                 msg->msg_flags |= MSG_TRUNC;
3698                 copied = len;
3699         }
3700
3701         skb_reset_transport_header(skb);
3702         err = skb_copy_datagram_msg(skb, 0, msg, copied);
3703         if (err)
3704                 goto out_free;
3705
3706         sock_recv_ts_and_drops(msg, sk, skb);
3707
3708         err = (flags & MSG_TRUNC) ? skb->len : copied;
3709
3710         if (pfk->dump.dump != NULL &&
3711             3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3712                 pfkey_do_dump(pfk);
3713
3714 out_free:
3715         skb_free_datagram(sk, skb);
3716 out:
3717         return err;
3718 }
3719
3720 static const struct proto_ops pfkey_ops = {
3721         .family         =       PF_KEY,
3722         .owner          =       THIS_MODULE,
3723         /* Operations that make no sense on pfkey sockets. */
3724         .bind           =       sock_no_bind,
3725         .connect        =       sock_no_connect,
3726         .socketpair     =       sock_no_socketpair,
3727         .accept         =       sock_no_accept,
3728         .getname        =       sock_no_getname,
3729         .ioctl          =       sock_no_ioctl,
3730         .listen         =       sock_no_listen,
3731         .shutdown       =       sock_no_shutdown,
3732         .setsockopt     =       sock_no_setsockopt,
3733         .getsockopt     =       sock_no_getsockopt,
3734         .mmap           =       sock_no_mmap,
3735         .sendpage       =       sock_no_sendpage,
3736
3737         /* Now the operations that really occur. */
3738         .release        =       pfkey_release,
3739         .poll           =       datagram_poll,
3740         .sendmsg        =       pfkey_sendmsg,
3741         .recvmsg        =       pfkey_recvmsg,
3742 };
3743
3744 static const struct net_proto_family pfkey_family_ops = {
3745         .family =       PF_KEY,
3746         .create =       pfkey_create,
3747         .owner  =       THIS_MODULE,
3748 };
3749
3750 #ifdef CONFIG_PROC_FS
3751 static int pfkey_seq_show(struct seq_file *f, void *v)
3752 {
3753         struct sock *s = sk_entry(v);
3754
3755         if (v == SEQ_START_TOKEN)
3756                 seq_printf(f ,"sk       RefCnt Rmem   Wmem   User   Inode\n");
3757         else
3758                 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
3759                                s,
3760                                atomic_read(&s->sk_refcnt),
3761                                sk_rmem_alloc_get(s),
3762                                sk_wmem_alloc_get(s),
3763                                from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
3764                                sock_i_ino(s)
3765                                );
3766         return 0;
3767 }
3768
3769 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3770         __acquires(rcu)
3771 {
3772         struct net *net = seq_file_net(f);
3773         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3774
3775         rcu_read_lock();
3776         return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
3777 }
3778
3779 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3780 {
3781         struct net *net = seq_file_net(f);
3782         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3783
3784         return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
3785 }
3786
3787 static void pfkey_seq_stop(struct seq_file *f, void *v)
3788         __releases(rcu)
3789 {
3790         rcu_read_unlock();
3791 }
3792
3793 static const struct seq_operations pfkey_seq_ops = {
3794         .start  = pfkey_seq_start,
3795         .next   = pfkey_seq_next,
3796         .stop   = pfkey_seq_stop,
3797         .show   = pfkey_seq_show,
3798 };
3799
3800 static int pfkey_seq_open(struct inode *inode, struct file *file)
3801 {
3802         return seq_open_net(inode, file, &pfkey_seq_ops,
3803                             sizeof(struct seq_net_private));
3804 }
3805
3806 static const struct file_operations pfkey_proc_ops = {
3807         .open    = pfkey_seq_open,
3808         .read    = seq_read,
3809         .llseek  = seq_lseek,
3810         .release = seq_release_net,
3811 };
3812
3813 static int __net_init pfkey_init_proc(struct net *net)
3814 {
3815         struct proc_dir_entry *e;
3816
3817         e = proc_create("pfkey", 0, net->proc_net, &pfkey_proc_ops);
3818         if (e == NULL)
3819                 return -ENOMEM;
3820
3821         return 0;
3822 }
3823
3824 static void __net_exit pfkey_exit_proc(struct net *net)
3825 {
3826         remove_proc_entry("pfkey", net->proc_net);
3827 }
3828 #else
3829 static inline int pfkey_init_proc(struct net *net)
3830 {
3831         return 0;
3832 }
3833
3834 static inline void pfkey_exit_proc(struct net *net)
3835 {
3836 }
3837 #endif
3838
3839 static struct xfrm_mgr pfkeyv2_mgr =
3840 {
3841         .notify         = pfkey_send_notify,
3842         .acquire        = pfkey_send_acquire,
3843         .compile_policy = pfkey_compile_policy,
3844         .new_mapping    = pfkey_send_new_mapping,
3845         .notify_policy  = pfkey_send_policy_notify,
3846         .migrate        = pfkey_send_migrate,
3847         .is_alive       = pfkey_is_alive,
3848 };
3849
3850 static int __net_init pfkey_net_init(struct net *net)
3851 {
3852         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3853         int rv;
3854
3855         INIT_HLIST_HEAD(&net_pfkey->table);
3856         atomic_set(&net_pfkey->socks_nr, 0);
3857
3858         rv = pfkey_init_proc(net);
3859
3860         return rv;
3861 }
3862
3863 static void __net_exit pfkey_net_exit(struct net *net)
3864 {
3865         struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3866
3867         pfkey_exit_proc(net);
3868         BUG_ON(!hlist_empty(&net_pfkey->table));
3869 }
3870
3871 static struct pernet_operations pfkey_net_ops = {
3872         .init = pfkey_net_init,
3873         .exit = pfkey_net_exit,
3874         .id   = &pfkey_net_id,
3875         .size = sizeof(struct netns_pfkey),
3876 };
3877
3878 static void __exit ipsec_pfkey_exit(void)
3879 {
3880         xfrm_unregister_km(&pfkeyv2_mgr);
3881         sock_unregister(PF_KEY);
3882         unregister_pernet_subsys(&pfkey_net_ops);
3883         proto_unregister(&key_proto);
3884 }
3885
3886 static int __init ipsec_pfkey_init(void)
3887 {
3888         int err = proto_register(&key_proto, 0);
3889
3890         if (err != 0)
3891                 goto out;
3892
3893         err = register_pernet_subsys(&pfkey_net_ops);
3894         if (err != 0)
3895                 goto out_unregister_key_proto;
3896         err = sock_register(&pfkey_family_ops);
3897         if (err != 0)
3898                 goto out_unregister_pernet;
3899         err = xfrm_register_km(&pfkeyv2_mgr);
3900         if (err != 0)
3901                 goto out_sock_unregister;
3902 out:
3903         return err;
3904
3905 out_sock_unregister:
3906         sock_unregister(PF_KEY);
3907 out_unregister_pernet:
3908         unregister_pernet_subsys(&pfkey_net_ops);
3909 out_unregister_key_proto:
3910         proto_unregister(&key_proto);
3911         goto out;
3912 }
3913
3914 module_init(ipsec_pfkey_init);
3915 module_exit(ipsec_pfkey_exit);
3916 MODULE_LICENSE("GPL");
3917 MODULE_ALIAS_NETPROTO(PF_KEY);