net/ipv6/raw.c

   1 /*
   2  *      RAW sockets for IPv6
   3  *      Linux INET6 implementation
   4  *
   5  *      Authors:
   6  *      Pedro Roque             <roque@di.fc.ul.pt>
   7  *
   8  *      Adapted from linux/net/ipv4/raw.c
   9  *
  10  *      Fixes:
  11  *      Hideaki YOSHIFUJI       :       sin6_scope_id support
  12  *      YOSHIFUJI,H.@USAGI      :       raw checksum (RFC2292(bis) compliance)
  13  *      Kazunori MIYAZAWA @USAGI:       change process style to use ip6_append_data
  14  *
  15  *      This program is free software; you can redistribute it and/or
  16  *      modify it under the terms of the GNU General Public License
  17  *      as published by the Free Software Foundation; either version
  18  *      2 of the License, or (at your option) any later version.
  19  */
  20
  21 #include <linux/errno.h>
  22 #include <linux/types.h>
  23 #include <linux/socket.h>
  24 #include <linux/slab.h>
  25 #include <linux/sockios.h>
  26 #include <linux/net.h>
  27 #include <linux/in6.h>
  28 #include <linux/netdevice.h>
  29 #include <linux/if_arp.h>
  30 #include <linux/icmpv6.h>
  31 #include <linux/netfilter.h>
  32 #include <linux/netfilter_ipv6.h>
  33 #include <linux/skbuff.h>
  34 #include <linux/compat.h>
  35 #include <asm/uaccess.h>
  36 #include <asm/ioctls.h>
  37
  38 #include <net/net_namespace.h>
  39 #include <net/ip.h>
  40 #include <net/sock.h>
  41 #include <net/snmp.h>
  42
  43 #include <net/ipv6.h>
  44 #include <net/ndisc.h>
  45 #include <net/protocol.h>
  46 #include <net/ip6_route.h>
  47 #include <net/ip6_checksum.h>
  48 #include <net/addrconf.h>
  49 #include <net/transp_v6.h>
  50 #include <net/udp.h>
  51 #include <net/inet_common.h>
  52 #include <net/tcp_states.h>
  53 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
  54 #include <net/mip6.h>
  55 #endif
  56 #include <linux/mroute6.h>
  57
  58 #include <net/raw.h>
  59 #include <net/rawv6.h>
  60 #include <net/xfrm.h>
  61
  62 #include <linux/proc_fs.h>
  63 #include <linux/seq_file.h>
  64 #include <linux/export.h>
  65
  66 static struct raw_hashinfo raw_v6_hashinfo = {
  67         .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
  68 };
  69
  70 static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
  71                 unsigned short num, const struct in6_addr *loc_addr,
  72                 const struct in6_addr *rmt_addr, int dif)
  73 {
  74         struct hlist_node *node;
  75         int is_multicast = ipv6_addr_is_multicast(loc_addr);
  76
  77         sk_for_each_from(sk, node)
  78                 if (inet_sk(sk)->inet_num == num) {
  79                         struct ipv6_pinfo *np = inet6_sk(sk);
  80
  81                         if (!net_eq(sock_net(sk), net))
  82                                 continue;
  83
  84                         if (!ipv6_addr_any(&np->daddr) &&
  85                             !ipv6_addr_equal(&np->daddr, rmt_addr))
  86                                 continue;
  87
  88                         if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
  89                                 continue;
  90
  91                         if (!ipv6_addr_any(&np->rcv_saddr)) {
  92                                 if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
  93                                         goto found;
  94                                 if (is_multicast &&
  95                                     inet6_mc_check(sk, loc_addr, rmt_addr))
  96                                         goto found;
  97                                 continue;
  98                         }
  99                         goto found;
 100                 }
 101         sk = NULL;
 102 found:
 103         return sk;
 104 }
 105
 106 /*
 107  *      0 - deliver
 108  *      1 - block
 109  */
 110 static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
 111 {
 112         struct icmp6hdr *icmph;
 113         struct raw6_sock *rp = raw6_sk(sk);
 114
 115         if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) {
 116                 __u32 *data = &rp->filter.data[0];
 117                 int bit_nr;
 118
 119                 icmph = (struct icmp6hdr *) skb->data;
 120                 bit_nr = icmph->icmp6_type;
 121
 122                 return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0;
 123         }
 124         return 0;
 125 }
 126
 127 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 128 typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb);
 129
 130 static mh_filter_t __rcu *mh_filter __read_mostly;
 131
 132 int rawv6_mh_filter_register(mh_filter_t filter)
 133 {
 134         rcu_assign_pointer(mh_filter, filter);
 135         return 0;
 136 }
 137 EXPORT_SYMBOL(rawv6_mh_filter_register);
 138
 139 int rawv6_mh_filter_unregister(mh_filter_t filter)
 140 {
 141         RCU_INIT_POINTER(mh_filter, NULL);
 142         synchronize_rcu();
 143         return 0;
 144 }
 145 EXPORT_SYMBOL(rawv6_mh_filter_unregister);
 146
 147 #endif
 148
 149 /*
 150  *      demultiplex raw sockets.
 151  *      (should consider queueing the skb in the sock receive_queue
 152  *      without calling rawv6.c)
 153  *
 154  *      Caller owns SKB so we must make clones.
 155  */
 156 static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
 157 {
 158         const struct in6_addr *saddr;
 159         const struct in6_addr *daddr;
 160         struct sock *sk;
 161         int delivered = 0;
 162         __u8 hash;
 163         struct net *net;
 164
 165         saddr = &ipv6_hdr(skb)->saddr;
 166         daddr = saddr + 1;
 167
 168         hash = nexthdr & (MAX_INET_PROTOS - 1);
 169
 170         read_lock(&raw_v6_hashinfo.lock);
 171         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 172
 173         if (sk == NULL)
 174                 goto out;
 175
 176         net = dev_net(skb->dev);
 177         sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
 178
 179         while (sk) {
 180                 int filtered;
 181
 182                 delivered = 1;
 183                 switch (nexthdr) {
 184                 case IPPROTO_ICMPV6:
 185                         filtered = icmpv6_filter(sk, skb);
 186                         break;
 187
 188 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 189                 case IPPROTO_MH:
 190                 {
 191                         /* XXX: To validate MH only once for each packet,
 192                          * this is placed here. It should be after checking
 193                          * xfrm policy, however it doesn't. The checking xfrm
 194                          * policy is placed in rawv6_rcv() because it is
 195                          * required for each socket.
 196                          */
 197                         mh_filter_t *filter;
 198
 199                         filter = rcu_dereference(mh_filter);
 200                         filtered = filter ? (*filter)(sk, skb) : 0;
 201                         break;
 202                 }
 203 #endif
 204                 default:
 205                         filtered = 0;
 206                         break;
 207                 }
 208
 209                 if (filtered < 0)
 210                         break;
 211                 if (filtered == 0) {
 212                         struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
 213
 214                         /* Not releasing hash table! */
 215                         if (clone) {
 216                                 nf_reset(clone);
 217                                 rawv6_rcv(sk, clone);
 218                         }
 219                 }
 220                 sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
 221                                      IP6CB(skb)->iif);
 222         }
 223 out:
 224         read_unlock(&raw_v6_hashinfo.lock);
 225         return delivered;
 226 }
 227
 228 int raw6_local_deliver(struct sk_buff *skb, int nexthdr)
 229 {
 230         struct sock *raw_sk;
 231
 232         raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]);
 233         if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
 234                 raw_sk = NULL;
 235
 236         return raw_sk != NULL;
 237 }
 238
 239 /* This cleans up af_inet6 a bit. -DaveM */
 240 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 241 {
 242         struct inet_sock *inet = inet_sk(sk);
 243         struct ipv6_pinfo *np = inet6_sk(sk);
 244         struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
 245         __be32 v4addr = 0;
 246         int addr_type;
 247         int err;
 248
 249         if (addr_len < SIN6_LEN_RFC2133)
 250                 return -EINVAL;
 251         addr_type = ipv6_addr_type(&addr->sin6_addr);
 252
 253         /* Raw sockets are IPv6 only */
 254         if (addr_type == IPV6_ADDR_MAPPED)
 255                 return -EADDRNOTAVAIL;
 256
 257         lock_sock(sk);
 258
 259         err = -EINVAL;
 260         if (sk->sk_state != TCP_CLOSE)
 261                 goto out;
 262
 263         rcu_read_lock();
 264         /* Check if the address belongs to the host. */
 265         if (addr_type != IPV6_ADDR_ANY) {
 266                 struct net_device *dev = NULL;
 267
 268                 if (addr_type & IPV6_ADDR_LINKLOCAL) {
 269                         if (addr_len >= sizeof(struct sockaddr_in6) &&
 270                             addr->sin6_scope_id) {
 271                                 /* Override any existing binding, if another
 272                                  * one is supplied by user.
 273                                  */
 274                                 sk->sk_bound_dev_if = addr->sin6_scope_id;
 275                         }
 276
 277                         /* Binding to link-local address requires an interface */
 278                         if (!sk->sk_bound_dev_if)
 279                                 goto out_unlock;
 280
 281                         err = -ENODEV;
 282                         dev = dev_get_by_index_rcu(sock_net(sk),
 283                                                    sk->sk_bound_dev_if);
 284                         if (!dev)
 285                                 goto out_unlock;
 286                 }
 287
 288                 /* ipv4 addr of the socket is invalid.  Only the
 289                  * unspecified and mapped address have a v4 equivalent.
 290                  */
 291                 v4addr = LOOPBACK4_IPV6;
 292                 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
 293                         err = -EADDRNOTAVAIL;
 294                         if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
 295                                            dev, 0)) {
 296                                 goto out_unlock;
 297                         }
 298                 }
 299         }
 300
 301         inet->inet_rcv_saddr = inet->inet_saddr = v4addr;
 302         ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
 303         if (!(addr_type & IPV6_ADDR_MULTICAST))
 304                 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
 305         err = 0;
 306 out_unlock:
 307         rcu_read_unlock();
 308 out:
 309         release_sock(sk);
 310         return err;
 311 }
 312
 313 static void rawv6_err(struct sock *sk, struct sk_buff *skb,
 314                struct inet6_skb_parm *opt,
 315                u8 type, u8 code, int offset, __be32 info)
 316 {
 317         struct inet_sock *inet = inet_sk(sk);
 318         struct ipv6_pinfo *np = inet6_sk(sk);
 319         int err;
 320         int harderr;
 321
 322         /* Report error on raw socket, if:
 323            1. User requested recverr.
 324            2. Socket is connected (otherwise the error indication
 325               is useless without recverr and error is hard.
 326          */
 327         if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
 328                 return;
 329
 330         harderr = icmpv6_err_convert(type, code, &err);
 331         if (type == ICMPV6_PKT_TOOBIG)
 332                 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
 333
 334         if (np->recverr) {
 335                 u8 *payload = skb->data;
 336                 if (!inet->hdrincl)
 337                         payload += offset;
 338                 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
 339         }
 340
 341         if (np->recverr || harderr) {
 342                 sk->sk_err = err;
 343                 sk->sk_error_report(sk);
 344         }
 345 }
 346
 347 void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
 348                 u8 type, u8 code, int inner_offset, __be32 info)
 349 {
 350         struct sock *sk;
 351         int hash;
 352         const struct in6_addr *saddr, *daddr;
 353         struct net *net;
 354
 355         hash = nexthdr & (RAW_HTABLE_SIZE - 1);
 356
 357         read_lock(&raw_v6_hashinfo.lock);
 358         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 359         if (sk != NULL) {
 360                 /* Note: ipv6_hdr(skb) != skb->data */
 361                 const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data;
 362                 saddr = &ip6h->saddr;
 363                 daddr = &ip6h->daddr;
 364                 net = dev_net(skb->dev);
 365
 366                 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
 367                                                 IP6CB(skb)->iif))) {
 368                         rawv6_err(sk, skb, NULL, type, code,
 369                                         inner_offset, info);
 370                         sk = sk_next(sk);
 371                 }
 372         }
 373         read_unlock(&raw_v6_hashinfo.lock);
 374 }
 375
 376 static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb)
 377 {
 378         if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) &&
 379             skb_checksum_complete(skb)) {
 380                 atomic_inc(&sk->sk_drops);
 381                 kfree_skb(skb);
 382                 return NET_RX_DROP;
 383         }
 384
 385         /* Charge it to the socket. */
 386         if (ip_queue_rcv_skb(sk, skb) < 0) {
 387                 kfree_skb(skb);
 388                 return NET_RX_DROP;
 389         }
 390
 391         return 0;
 392 }
 393
 394 /*
 395  *      This is next to useless...
 396  *      if we demultiplex in network layer we don't need the extra call
 397  *      just to queue the skb...
 398  *      maybe we could have the network decide upon a hint if it
 399  *      should call raw_rcv for demultiplexing
 400  */
 401 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
 402 {
 403         struct inet_sock *inet = inet_sk(sk);
 404         struct raw6_sock *rp = raw6_sk(sk);
 405
 406         if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
 407                 atomic_inc(&sk->sk_drops);
 408                 kfree_skb(skb);
 409                 return NET_RX_DROP;
 410         }
 411
 412         if (!rp->checksum)
 413                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 414
 415         if (skb->ip_summed == CHECKSUM_COMPLETE) {
 416                 skb_postpull_rcsum(skb, skb_network_header(skb),
 417                                    skb_network_header_len(skb));
 418                 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 419                                      &ipv6_hdr(skb)->daddr,
 420                                      skb->len, inet->inet_num, skb->csum))
 421                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 422         }
 423         if (!skb_csum_unnecessary(skb))
 424                 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 425                                                          &ipv6_hdr(skb)->daddr,
 426                                                          skb->len,
 427                                                          inet->inet_num, 0));
 428
 429         if (inet->hdrincl) {
 430                 if (skb_checksum_complete(skb)) {
 431                         atomic_inc(&sk->sk_drops);
 432                         kfree_skb(skb);
 433                         return NET_RX_DROP;
 434                 }
 435         }
 436
 437         rawv6_rcv_skb(sk, skb);
 438         return 0;
 439 }
 440
 441
 442 /*
 443  *      This should be easy, if there is something there
 444  *      we return it, otherwise we block.
 445  */
 446
 447 static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
 448                   struct msghdr *msg, size_t len,
 449                   int noblock, int flags, int *addr_len)
 450 {
 451         struct ipv6_pinfo *np = inet6_sk(sk);
 452         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
 453         struct sk_buff *skb;
 454         size_t copied;
 455         int err;
 456
 457         if (flags & MSG_OOB)
 458                 return -EOPNOTSUPP;
 459
 460         if (addr_len)
 461                 *addr_len=sizeof(*sin6);
 462
 463         if (flags & MSG_ERRQUEUE)
 464                 return ipv6_recv_error(sk, msg, len);
 465
 466         if (np->rxpmtu && np->rxopt.bits.rxpmtu)
 467                 return ipv6_recv_rxpmtu(sk, msg, len);
 468
 469         skb = skb_recv_datagram(sk, flags, noblock, &err);
 470         if (!skb)
 471                 goto out;
 472
 473         copied = skb->len;
 474         if (copied > len) {
 475                 copied = len;
 476                 msg->msg_flags |= MSG_TRUNC;
 477         }
 478
 479         if (skb_csum_unnecessary(skb)) {
 480                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 481         } else if (msg->msg_flags&MSG_TRUNC) {
 482                 if (__skb_checksum_complete(skb))
 483                         goto csum_copy_err;
 484                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 485         } else {
 486                 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
 487                 if (err == -EINVAL)
 488                         goto csum_copy_err;
 489         }
 490         if (err)
 491                 goto out_free;
 492
 493         /* Copy the address. */
 494         if (sin6) {
 495                 sin6->sin6_family = AF_INET6;
 496                 sin6->sin6_port = 0;
 497                 ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr);
 498                 sin6->sin6_flowinfo = 0;
 499                 sin6->sin6_scope_id = 0;
 500                 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
 501                         sin6->sin6_scope_id = IP6CB(skb)->iif;
 502         }
 503
 504         sock_recv_ts_and_drops(msg, sk, skb);
 505
 506         if (np->rxopt.all)
 507                 datagram_recv_ctl(sk, msg, skb);
 508
 509         err = copied;
 510         if (flags & MSG_TRUNC)
 511                 err = skb->len;
 512
 513 out_free:
 514         skb_free_datagram(sk, skb);
 515 out:
 516         return err;
 517
 518 csum_copy_err:
 519         skb_kill_datagram(sk, skb, flags);
 520
 521         /* Error for blocking case is chosen to masquerade
 522            as some normal condition.
 523          */
 524         err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
 525         goto out;
 526 }
 527
 528 static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
 529                                      struct raw6_sock *rp)
 530 {
 531         struct sk_buff *skb;
 532         int err = 0;
 533         int offset;
 534         int len;
 535         int total_len;
 536         __wsum tmp_csum;
 537         __sum16 csum;
 538
 539         if (!rp->checksum)
 540                 goto send;
 541
 542         if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
 543                 goto out;
 544
 545         offset = rp->offset;
 546         total_len = inet_sk(sk)->cork.base.length;
 547         if (offset >= total_len - 1) {
 548                 err = -EINVAL;
 549                 ip6_flush_pending_frames(sk);
 550                 goto out;
 551         }
 552
 553         /* should be check HW csum miyazawa */
 554         if (skb_queue_len(&sk->sk_write_queue) == 1) {
 555                 /*
 556                  * Only one fragment on the socket.
 557                  */
 558                 tmp_csum = skb->csum;
 559         } else {
 560                 struct sk_buff *csum_skb = NULL;
 561                 tmp_csum = 0;
 562
 563                 skb_queue_walk(&sk->sk_write_queue, skb) {
 564                         tmp_csum = csum_add(tmp_csum, skb->csum);
 565
 566                         if (csum_skb)
 567                                 continue;
 568
 569                         len = skb->len - skb_transport_offset(skb);
 570                         if (offset >= len) {
 571                                 offset -= len;
 572                                 continue;
 573                         }
 574
 575                         csum_skb = skb;
 576                 }
 577
 578                 skb = csum_skb;
 579         }
 580
 581         offset += skb_transport_offset(skb);
 582         if (skb_copy_bits(skb, offset, &csum, 2))
 583                 BUG();
 584
 585         /* in case cksum was not initialized */
 586         if (unlikely(csum))
 587                 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
 588
 589         csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr,
 590                                total_len, fl6->flowi6_proto, tmp_csum);
 591
 592         if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP)
 593                 csum = CSUM_MANGLED_0;
 594
 595         if (skb_store_bits(skb, offset, &csum, 2))
 596                 BUG();
 597
 598 send:
 599         err = ip6_push_pending_frames(sk);
 600 out:
 601         return err;
 602 }
 603
 604 static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
 605                         struct flowi6 *fl6, struct dst_entry **dstp,
 606                         unsigned int flags)
 607 {
 608         struct ipv6_pinfo *np = inet6_sk(sk);
 609         struct ipv6hdr *iph;
 610         struct sk_buff *skb;
 611         int err;
 612         struct rt6_info *rt = (struct rt6_info *)*dstp;
 613
 614         if (length > rt->dst.dev->mtu) {
 615                 ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu);
 616                 return -EMSGSIZE;
 617         }
 618         if (flags&MSG_PROBE)
 619                 goto out;
 620
 621         skb = sock_alloc_send_skb(sk,
 622                                   length + LL_ALLOCATED_SPACE(rt->dst.dev) + 15,
 623                                   flags & MSG_DONTWAIT, &err);
 624         if (skb == NULL)
 625                 goto error;
 626         skb_reserve(skb, LL_RESERVED_SPACE(rt->dst.dev));
 627
 628         skb->priority = sk->sk_priority;
 629         skb->mark = sk->sk_mark;
 630         skb_dst_set(skb, &rt->dst);
 631         *dstp = NULL;
 632
 633         skb_put(skb, length);
 634         skb_reset_network_header(skb);
 635         iph = ipv6_hdr(skb);
 636
 637         skb->ip_summed = CHECKSUM_NONE;
 638
 639         skb->transport_header = skb->network_header;
 640         err = memcpy_fromiovecend((void *)iph, from, 0, length);
 641         if (err)
 642                 goto error_fault;
 643
 644         IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
 645         err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL,
 646                       rt->dst.dev, dst_output);
 647         if (err > 0)
 648                 err = net_xmit_errno(err);
 649         if (err)
 650                 goto error;
 651 out:
 652         return 0;
 653
 654 error_fault:
 655         err = -EFAULT;
 656         kfree_skb(skb);
 657 error:
 658         IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
 659         if (err == -ENOBUFS && !np->recverr)
 660                 err = 0;
 661         return err;
 662 }
 663
 664 static int rawv6_probe_proto_opt(struct flowi6 *fl6, struct msghdr *msg)
 665 {
 666         struct iovec *iov;
 667         u8 __user *type = NULL;
 668         u8 __user *code = NULL;
 669         u8 len = 0;
 670         int probed = 0;
 671         int i;
 672
 673         if (!msg->msg_iov)
 674                 return 0;
 675
 676         for (i = 0; i < msg->msg_iovlen; i++) {
 677                 iov = &msg->msg_iov[i];
 678                 if (!iov)
 679                         continue;
 680
 681                 switch (fl6->flowi6_proto) {
 682                 case IPPROTO_ICMPV6:
 683                         /* check if one-byte field is readable or not. */
 684                         if (iov->iov_base && iov->iov_len < 1)
 685                                 break;
 686
 687                         if (!type) {
 688                                 type = iov->iov_base;
 689                                 /* check if code field is readable or not. */
 690                                 if (iov->iov_len > 1)
 691                                         code = type + 1;
 692                         } else if (!code)
 693                                 code = iov->iov_base;
 694
 695                         if (type && code) {
 696                                 if (get_user(fl6->fl6_icmp_type, type) ||
 697                                     get_user(fl6->fl6_icmp_code, code))
 698                                         return -EFAULT;
 699                                 probed = 1;
 700                         }
 701                         break;
 702                 case IPPROTO_MH:
 703                         if (iov->iov_base && iov->iov_len < 1)
 704                                 break;
 705                         /* check if type field is readable or not. */
 706                         if (iov->iov_len > 2 - len) {
 707                                 u8 __user *p = iov->iov_base;
 708                                 if (get_user(fl6->fl6_mh_type, &p[2 - len]))
 709                                         return -EFAULT;
 710                                 probed = 1;
 711                         } else
 712                                 len += iov->iov_len;
 713
 714                         break;
 715                 default:
 716                         probed = 1;
 717                         break;
 718                 }
 719                 if (probed)
 720                         break;
 721         }
 722         return 0;
 723 }
 724
 725 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
 726                    struct msghdr *msg, size_t len)
 727 {
 728         struct ipv6_txoptions opt_space;
 729         struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
 730         struct in6_addr *daddr, *final_p, final;
 731         struct inet_sock *inet = inet_sk(sk);
 732         struct ipv6_pinfo *np = inet6_sk(sk);
 733         struct raw6_sock *rp = raw6_sk(sk);
 734         struct ipv6_txoptions *opt = NULL;
 735         struct ip6_flowlabel *flowlabel = NULL;
 736         struct dst_entry *dst = NULL;
 737         struct flowi6 fl6;
 738         int addr_len = msg->msg_namelen;
 739         int hlimit = -1;
 740         int tclass = -1;
 741         int dontfrag = -1;
 742         u16 proto;
 743         int err;
 744
 745         /* Rough check on arithmetic overflow,
 746            better check is made in ip6_append_data().
 747          */
 748         if (len > INT_MAX)
 749                 return -EMSGSIZE;
 750
 751         /* Mirror BSD error message compatibility */
 752         if (msg->msg_flags & MSG_OOB)
 753                 return -EOPNOTSUPP;
 754
 755         /*
 756          *      Get and verify the address.
 757          */
 758         memset(&fl6, 0, sizeof(fl6));
 759
 760         fl6.flowi6_mark = sk->sk_mark;
 761
 762         if (sin6) {
 763                 if (addr_len < SIN6_LEN_RFC2133)
 764                         return -EINVAL;
 765
 766                 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
 767                         return -EAFNOSUPPORT;
 768
 769                 /* port is the proto value [0..255] carried in nexthdr */
 770                 proto = ntohs(sin6->sin6_port);
 771
 772                 if (!proto)
 773                         proto = inet->inet_num;
 774                 else if (proto != inet->inet_num)
 775                         return -EINVAL;
 776
 777                 if (proto > 255)
 778                         return -EINVAL;
 779
 780                 daddr = &sin6->sin6_addr;
 781                 if (np->sndflow) {
 782                         fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
 783                         if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
 784                                 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
 785                                 if (flowlabel == NULL)
 786                                         return -EINVAL;
 787                                 daddr = &flowlabel->dst;
 788                         }
 789                 }
 790
 791                 /*
 792                  * Otherwise it will be difficult to maintain
 793                  * sk->sk_dst_cache.
 794                  */
 795                 if (sk->sk_state == TCP_ESTABLISHED &&
 796                     ipv6_addr_equal(daddr, &np->daddr))
 797                         daddr = &np->daddr;
 798
 799                 if (addr_len >= sizeof(struct sockaddr_in6) &&
 800                     sin6->sin6_scope_id &&
 801                     ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
 802                         fl6.flowi6_oif = sin6->sin6_scope_id;
 803         } else {
 804                 if (sk->sk_state != TCP_ESTABLISHED)
 805                         return -EDESTADDRREQ;
 806
 807                 proto = inet->inet_num;
 808                 daddr = &np->daddr;
 809                 fl6.flowlabel = np->flow_label;
 810         }
 811
 812         if (fl6.flowi6_oif == 0)
 813                 fl6.flowi6_oif = sk->sk_bound_dev_if;
 814
 815         if (msg->msg_controllen) {
 816                 opt = &opt_space;
 817                 memset(opt, 0, sizeof(struct ipv6_txoptions));
 818                 opt->tot_len = sizeof(struct ipv6_txoptions);
 819
 820                 err = datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt,
 821                                         &hlimit, &tclass, &dontfrag);
 822                 if (err < 0) {
 823                         fl6_sock_release(flowlabel);
 824                         return err;
 825                 }
 826                 if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
 827                         flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
 828                         if (flowlabel == NULL)
 829                                 return -EINVAL;
 830                 }
 831                 if (!(opt->opt_nflen|opt->opt_flen))
 832                         opt = NULL;
 833         }
 834         if (opt == NULL)
 835                 opt = np->opt;
 836         if (flowlabel)
 837                 opt = fl6_merge_options(&opt_space, flowlabel, opt);
 838         opt = ipv6_fixup_options(&opt_space, opt);
 839
 840         fl6.flowi6_proto = proto;
 841         err = rawv6_probe_proto_opt(&fl6, msg);
 842         if (err)
 843                 goto out;
 844
 845         if (!ipv6_addr_any(daddr))
 846                 ipv6_addr_copy(&fl6.daddr, daddr);
 847         else
 848                 fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
 849         if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
 850                 ipv6_addr_copy(&fl6.saddr, &np->saddr);
 851
 852         final_p = fl6_update_dst(&fl6, opt, &final);
 853
 854         if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
 855                 fl6.flowi6_oif = np->mcast_oif;
 856         security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
 857
 858         dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true);
 859         if (IS_ERR(dst)) {
 860                 err = PTR_ERR(dst);
 861                 goto out;
 862         }
 863         if (hlimit < 0) {
 864                 if (ipv6_addr_is_multicast(&fl6.daddr))
 865                         hlimit = np->mcast_hops;
 866                 else
 867                         hlimit = np->hop_limit;
 868                 if (hlimit < 0)
 869                         hlimit = ip6_dst_hoplimit(dst);
 870         }
 871
 872         if (tclass < 0)
 873                 tclass = np->tclass;
 874
 875         if (dontfrag < 0)
 876                 dontfrag = np->dontfrag;
 877
 878         if (msg->msg_flags&MSG_CONFIRM)
 879                 goto do_confirm;
 880
 881 back_from_confirm:
 882         if (inet->hdrincl)
 883                 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl6, &dst, msg->msg_flags);
 884         else {
 885                 lock_sock(sk);
 886                 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
 887                         len, 0, hlimit, tclass, opt, &fl6, (struct rt6_info*)dst,
 888                         msg->msg_flags, dontfrag);
 889
 890                 if (err)
 891                         ip6_flush_pending_frames(sk);
 892                 else if (!(msg->msg_flags & MSG_MORE))
 893                         err = rawv6_push_pending_frames(sk, &fl6, rp);
 894                 release_sock(sk);
 895         }
 896 done:
 897         dst_release(dst);
 898 out:
 899         fl6_sock_release(flowlabel);
 900         return err<0?err:len;
 901 do_confirm:
 902         dst_confirm(dst);
 903         if (!(msg->msg_flags & MSG_PROBE) || len)
 904                 goto back_from_confirm;
 905         err = 0;
 906         goto done;
 907 }
 908
 909 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
 910                                char __user *optval, int optlen)
 911 {
 912         switch (optname) {
 913         case ICMPV6_FILTER:
 914                 if (optlen > sizeof(struct icmp6_filter))
 915                         optlen = sizeof(struct icmp6_filter);
 916                 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
 917                         return -EFAULT;
 918                 return 0;
 919         default:
 920                 return -ENOPROTOOPT;
 921         }
 922
 923         return 0;
 924 }
 925
 926 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
 927                                char __user *optval, int __user *optlen)
 928 {
 929         int len;
 930
 931         switch (optname) {
 932         case ICMPV6_FILTER:
 933                 if (get_user(len, optlen))
 934                         return -EFAULT;
 935                 if (len < 0)
 936                         return -EINVAL;
 937                 if (len > sizeof(struct icmp6_filter))
 938                         len = sizeof(struct icmp6_filter);
 939                 if (put_user(len, optlen))
 940                         return -EFAULT;
 941                 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
 942                         return -EFAULT;
 943                 return 0;
 944         default:
 945                 return -ENOPROTOOPT;
 946         }
 947
 948         return 0;
 949 }
 950
 951
 952 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
 953                             char __user *optval, unsigned int optlen)
 954 {
 955         struct raw6_sock *rp = raw6_sk(sk);
 956         int val;
 957
 958         if (get_user(val, (int __user *)optval))
 959                 return -EFAULT;
 960
 961         switch (optname) {
 962         case IPV6_CHECKSUM:
 963                 if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
 964                     level == IPPROTO_IPV6) {
 965                         /*
 966                          * RFC3542 tells that IPV6_CHECKSUM socket
 967                          * option in the IPPROTO_IPV6 level is not
 968                          * allowed on ICMPv6 sockets.
 969                          * If you want to set it, use IPPROTO_RAW
 970                          * level IPV6_CHECKSUM socket option
 971                          * (Linux extension).
 972                          */
 973                         return -EINVAL;
 974                 }
 975
 976                 /* You may get strange result with a positive odd offset;
 977                    RFC2292bis agrees with me. */
 978                 if (val > 0 && (val&1))
 979                         return -EINVAL;
 980                 if (val < 0) {
 981                         rp->checksum = 0;
 982                 } else {
 983                         rp->checksum = 1;
 984                         rp->offset = val;
 985                 }
 986
 987                 return 0;
 988
 989         default:
 990                 return -ENOPROTOOPT;
 991         }
 992 }
 993
 994 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
 995                           char __user *optval, unsigned int optlen)
 996 {
 997         switch (level) {
 998         case SOL_RAW:
 999                 break;
1000
1001         case SOL_ICMPV6:
1002                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1003                         return -EOPNOTSUPP;
1004                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1005         case SOL_IPV6:
1006                 if (optname == IPV6_CHECKSUM)
1007                         break;
1008         default:
1009                 return ipv6_setsockopt(sk, level, optname, optval, optlen);
1010         }
1011
1012         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1013 }
1014
1015 #ifdef CONFIG_COMPAT
1016 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1017                                    char __user *optval, unsigned int optlen)
1018 {
1019         switch (level) {
1020         case SOL_RAW:
1021                 break;
1022         case SOL_ICMPV6:
1023                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1024                         return -EOPNOTSUPP;
1025                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1026         case SOL_IPV6:
1027                 if (optname == IPV6_CHECKSUM)
1028                         break;
1029         default:
1030                 return compat_ipv6_setsockopt(sk, level, optname,
1031                                               optval, optlen);
1032         }
1033         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1034 }
1035 #endif
1036
1037 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1038                             char __user *optval, int __user *optlen)
1039 {
1040         struct raw6_sock *rp = raw6_sk(sk);
1041         int val, len;
1042
1043         if (get_user(len,optlen))
1044                 return -EFAULT;
1045
1046         switch (optname) {
1047         case IPV6_CHECKSUM:
1048                 /*
1049                  * We allow getsockopt() for IPPROTO_IPV6-level
1050                  * IPV6_CHECKSUM socket option on ICMPv6 sockets
1051                  * since RFC3542 is silent about it.
1052                  */
1053                 if (rp->checksum == 0)
1054                         val = -1;
1055                 else
1056                         val = rp->offset;
1057                 break;
1058
1059         default:
1060                 return -ENOPROTOOPT;
1061         }
1062
1063         len = min_t(unsigned int, sizeof(int), len);
1064
1065         if (put_user(len, optlen))
1066                 return -EFAULT;
1067         if (copy_to_user(optval,&val,len))
1068                 return -EFAULT;
1069         return 0;
1070 }
1071
1072 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1073                           char __user *optval, int __user *optlen)
1074 {
1075         switch (level) {
1076         case SOL_RAW:
1077                 break;
1078
1079         case SOL_ICMPV6:
1080                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1081                         return -EOPNOTSUPP;
1082                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1083         case SOL_IPV6:
1084                 if (optname == IPV6_CHECKSUM)
1085                         break;
1086         default:
1087                 return ipv6_getsockopt(sk, level, optname, optval, optlen);
1088         }
1089
1090         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1091 }
1092
1093 #ifdef CONFIG_COMPAT
1094 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1095                                    char __user *optval, int __user *optlen)
1096 {
1097         switch (level) {
1098         case SOL_RAW:
1099                 break;
1100         case SOL_ICMPV6:
1101                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1102                         return -EOPNOTSUPP;
1103                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1104         case SOL_IPV6:
1105                 if (optname == IPV6_CHECKSUM)
1106                         break;
1107         default:
1108                 return compat_ipv6_getsockopt(sk, level, optname,
1109                                               optval, optlen);
1110         }
1111         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1112 }
1113 #endif
1114
1115 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1116 {
1117         switch (cmd) {
1118         case SIOCOUTQ: {
1119                 int amount = sk_wmem_alloc_get(sk);
1120
1121                 return put_user(amount, (int __user *)arg);
1122         }
1123         case SIOCINQ: {
1124                 struct sk_buff *skb;
1125                 int amount = 0;
1126
1127                 spin_lock_bh(&sk->sk_receive_queue.lock);
1128                 skb = skb_peek(&sk->sk_receive_queue);
1129                 if (skb != NULL)
1130                         amount = skb->tail - skb->transport_header;
1131                 spin_unlock_bh(&sk->sk_receive_queue.lock);
1132                 return put_user(amount, (int __user *)arg);
1133         }
1134
1135         default:
1136 #ifdef CONFIG_IPV6_MROUTE
1137                 return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1138 #else
1139                 return -ENOIOCTLCMD;
1140 #endif
1141         }
1142 }
1143
1144 #ifdef CONFIG_COMPAT
1145 static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
1146 {
1147         switch (cmd) {
1148         case SIOCOUTQ:
1149         case SIOCINQ:
1150                 return -ENOIOCTLCMD;
1151         default:
1152 #ifdef CONFIG_IPV6_MROUTE
1153                 return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
1154 #else
1155                 return -ENOIOCTLCMD;
1156 #endif
1157         }
1158 }
1159 #endif
1160
1161 static void rawv6_close(struct sock *sk, long timeout)
1162 {
1163         if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1164                 ip6_ra_control(sk, -1);
1165         ip6mr_sk_done(sk);
1166         sk_common_release(sk);
1167 }
1168
1169 static void raw6_destroy(struct sock *sk)
1170 {
1171         lock_sock(sk);
1172         ip6_flush_pending_frames(sk);
1173         release_sock(sk);
1174
1175         inet6_destroy_sock(sk);
1176 }
1177
1178 static int rawv6_init_sk(struct sock *sk)
1179 {
1180         struct raw6_sock *rp = raw6_sk(sk);
1181
1182         switch (inet_sk(sk)->inet_num) {
1183         case IPPROTO_ICMPV6:
1184                 rp->checksum = 1;
1185                 rp->offset   = 2;
1186                 break;
1187         case IPPROTO_MH:
1188                 rp->checksum = 1;
1189                 rp->offset   = 4;
1190                 break;
1191         default:
1192                 break;
1193         }
1194         return 0;
1195 }
1196
1197 struct proto rawv6_prot = {
1198         .name              = "RAWv6",
1199         .owner             = THIS_MODULE,
1200         .close             = rawv6_close,
1201         .destroy           = raw6_destroy,
1202         .connect           = ip6_datagram_connect,
1203         .disconnect        = udp_disconnect,
1204         .ioctl             = rawv6_ioctl,
1205         .init              = rawv6_init_sk,
1206         .setsockopt        = rawv6_setsockopt,
1207         .getsockopt        = rawv6_getsockopt,
1208         .sendmsg           = rawv6_sendmsg,
1209         .recvmsg           = rawv6_recvmsg,
1210         .bind              = rawv6_bind,
1211         .backlog_rcv       = rawv6_rcv_skb,
1212         .hash              = raw_hash_sk,
1213         .unhash            = raw_unhash_sk,
1214         .obj_size          = sizeof(struct raw6_sock),
1215         .h.raw_hash        = &raw_v6_hashinfo,
1216 #ifdef CONFIG_COMPAT
1217         .compat_setsockopt = compat_rawv6_setsockopt,
1218         .compat_getsockopt = compat_rawv6_getsockopt,
1219         .compat_ioctl      = compat_rawv6_ioctl,
1220 #endif
1221 };
1222
1223 #ifdef CONFIG_PROC_FS
1224 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1225 {
1226         struct ipv6_pinfo *np = inet6_sk(sp);
1227         const struct in6_addr *dest, *src;
1228         __u16 destp, srcp;
1229
1230         dest  = &np->daddr;
1231         src   = &np->rcv_saddr;
1232         destp = 0;
1233         srcp  = inet_sk(sp)->inet_num;
1234         seq_printf(seq,
1235                    "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1236                    "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d\n",
1237                    i,
1238                    src->s6_addr32[0], src->s6_addr32[1],
1239                    src->s6_addr32[2], src->s6_addr32[3], srcp,
1240                    dest->s6_addr32[0], dest->s6_addr32[1],
1241                    dest->s6_addr32[2], dest->s6_addr32[3], destp,
1242                    sp->sk_state,
1243                    sk_wmem_alloc_get(sp),
1244                    sk_rmem_alloc_get(sp),
1245                    0, 0L, 0,
1246                    sock_i_uid(sp), 0,
1247                    sock_i_ino(sp),
1248                    atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1249 }
1250
1251 static int raw6_seq_show(struct seq_file *seq, void *v)
1252 {
1253         if (v == SEQ_START_TOKEN)
1254                 seq_printf(seq,
1255                            "  sl  "
1256                            "local_address                         "
1257                            "remote_address                        "
1258                            "st tx_queue rx_queue tr tm->when retrnsmt"
1259                            "   uid  timeout inode ref pointer drops\n");
1260         else
1261                 raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1262         return 0;
1263 }
1264
1265 static const struct seq_operations raw6_seq_ops = {
1266         .start =        raw_seq_start,
1267         .next =         raw_seq_next,
1268         .stop =         raw_seq_stop,
1269         .show =         raw6_seq_show,
1270 };
1271
1272 static int raw6_seq_open(struct inode *inode, struct file *file)
1273 {
1274         return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1275 }
1276
1277 static const struct file_operations raw6_seq_fops = {
1278         .owner =        THIS_MODULE,
1279         .open =         raw6_seq_open,
1280         .read =         seq_read,
1281         .llseek =       seq_lseek,
1282         .release =      seq_release_net,
1283 };
1284
1285 static int __net_init raw6_init_net(struct net *net)
1286 {
1287         if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops))
1288                 return -ENOMEM;
1289
1290         return 0;
1291 }
1292
1293 static void __net_exit raw6_exit_net(struct net *net)
1294 {
1295         proc_net_remove(net, "raw6");
1296 }
1297
1298 static struct pernet_operations raw6_net_ops = {
1299         .init = raw6_init_net,
1300         .exit = raw6_exit_net,
1301 };
1302
1303 int __init raw6_proc_init(void)
1304 {
1305         return register_pernet_subsys(&raw6_net_ops);
1306 }
1307
1308 void raw6_proc_exit(void)
1309 {
1310         unregister_pernet_subsys(&raw6_net_ops);
1311 }
1312 #endif  /* CONFIG_PROC_FS */
1313
1314 /* Same as inet6_dgram_ops, sans udp_poll.  */
1315 static const struct proto_ops inet6_sockraw_ops = {
1316         .family            = PF_INET6,
1317         .owner             = THIS_MODULE,
1318         .release           = inet6_release,
1319         .bind              = inet6_bind,
1320         .connect           = inet_dgram_connect,        /* ok           */
1321         .socketpair        = sock_no_socketpair,        /* a do nothing */
1322         .accept            = sock_no_accept,            /* a do nothing */
1323         .getname           = inet6_getname,
1324         .poll              = datagram_poll,             /* ok           */
1325         .ioctl             = inet6_ioctl,               /* must change  */
1326         .listen            = sock_no_listen,            /* ok           */
1327         .shutdown          = inet_shutdown,             /* ok           */
1328         .setsockopt        = sock_common_setsockopt,    /* ok           */
1329         .getsockopt        = sock_common_getsockopt,    /* ok           */
1330         .sendmsg           = inet_sendmsg,              /* ok           */
1331         .recvmsg           = sock_common_recvmsg,       /* ok           */
1332         .mmap              = sock_no_mmap,
1333         .sendpage          = sock_no_sendpage,
1334 #ifdef CONFIG_COMPAT
1335         .compat_setsockopt = compat_sock_common_setsockopt,
1336         .compat_getsockopt = compat_sock_common_getsockopt,
1337 #endif
1338 };
1339
1340 static struct inet_protosw rawv6_protosw = {
1341         .type           = SOCK_RAW,
1342         .protocol       = IPPROTO_IP,   /* wild card */
1343         .prot           = &rawv6_prot,
1344         .ops            = &inet6_sockraw_ops,
1345         .no_check       = UDP_CSUM_DEFAULT,
1346         .flags          = INET_PROTOSW_REUSE,
1347 };
1348
1349 int __init rawv6_init(void)
1350 {
1351         int ret;
1352
1353         ret = inet6_register_protosw(&rawv6_protosw);
1354         if (ret)
1355                 goto out;
1356 out:
1357         return ret;
1358 }
1359
1360 void rawv6_exit(void)
1361 {
1362         inet6_unregister_protosw(&rawv6_protosw);
1363 }