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 <asm/uaccess.h>
  35 #include <asm/ioctls.h>
  36
  37 #include <net/net_namespace.h>
  38 #include <net/ip.h>
  39 #include <net/sock.h>
  40 #include <net/snmp.h>
  41
  42 #include <net/ipv6.h>
  43 #include <net/ndisc.h>
  44 #include <net/protocol.h>
  45 #include <net/ip6_route.h>
  46 #include <net/ip6_checksum.h>
  47 #include <net/addrconf.h>
  48 #include <net/transp_v6.h>
  49 #include <net/udp.h>
  50 #include <net/inet_common.h>
  51 #include <net/tcp_states.h>
  52 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
  53 #include <net/mip6.h>
  54 #endif
  55 #include <linux/mroute6.h>
  56
  57 #include <net/raw.h>
  58 #include <net/rawv6.h>
  59 #include <net/xfrm.h>
  60
  61 #include <linux/proc_fs.h>
  62 #include <linux/seq_file.h>
  63
  64 static struct raw_hashinfo raw_v6_hashinfo = {
  65         .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
  66 };
  67
  68 static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
  69                 unsigned short num, struct in6_addr *loc_addr,
  70                 struct in6_addr *rmt_addr, int dif)
  71 {
  72         struct hlist_node *node;
  73         int is_multicast = ipv6_addr_is_multicast(loc_addr);
  74
  75         sk_for_each_from(sk, node)
  76                 if (inet_sk(sk)->inet_num == num) {
  77                         struct ipv6_pinfo *np = inet6_sk(sk);
  78
  79                         if (!net_eq(sock_net(sk), net))
  80                                 continue;
  81
  82                         if (!ipv6_addr_any(&np->daddr) &&
  83                             !ipv6_addr_equal(&np->daddr, rmt_addr))
  84                                 continue;
  85
  86                         if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
  87                                 continue;
  88
  89                         if (!ipv6_addr_any(&np->rcv_saddr)) {
  90                                 if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
  91                                         goto found;
  92                                 if (is_multicast &&
  93                                     inet6_mc_check(sk, loc_addr, rmt_addr))
  94                                         goto found;
  95                                 continue;
  96                         }
  97                         goto found;
  98                 }
  99         sk = NULL;
 100 found:
 101         return sk;
 102 }
 103
 104 /*
 105  *      0 - deliver
 106  *      1 - block
 107  */
 108 static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
 109 {
 110         struct icmp6hdr *icmph;
 111         struct raw6_sock *rp = raw6_sk(sk);
 112
 113         if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) {
 114                 __u32 *data = &rp->filter.data[0];
 115                 int bit_nr;
 116
 117                 icmph = (struct icmp6hdr *) skb->data;
 118                 bit_nr = icmph->icmp6_type;
 119
 120                 return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0;
 121         }
 122         return 0;
 123 }
 124
 125 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 126 static int (*mh_filter)(struct sock *sock, struct sk_buff *skb);
 127
 128 int rawv6_mh_filter_register(int (*filter)(struct sock *sock,
 129                                            struct sk_buff *skb))
 130 {
 131         rcu_assign_pointer(mh_filter, filter);
 132         return 0;
 133 }
 134 EXPORT_SYMBOL(rawv6_mh_filter_register);
 135
 136 int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock,
 137                                              struct sk_buff *skb))
 138 {
 139         rcu_assign_pointer(mh_filter, NULL);
 140         synchronize_rcu();
 141         return 0;
 142 }
 143 EXPORT_SYMBOL(rawv6_mh_filter_unregister);
 144
 145 #endif
 146
 147 /*
 148  *      demultiplex raw sockets.
 149  *      (should consider queueing the skb in the sock receive_queue
 150  *      without calling rawv6.c)
 151  *
 152  *      Caller owns SKB so we must make clones.
 153  */
 154 static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
 155 {
 156         struct in6_addr *saddr;
 157         struct in6_addr *daddr;
 158         struct sock *sk;
 159         int delivered = 0;
 160         __u8 hash;
 161         struct net *net;
 162
 163         saddr = &ipv6_hdr(skb)->saddr;
 164         daddr = saddr + 1;
 165
 166         hash = nexthdr & (MAX_INET_PROTOS - 1);
 167
 168         read_lock(&raw_v6_hashinfo.lock);
 169         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 170
 171         if (sk == NULL)
 172                 goto out;
 173
 174         net = dev_net(skb->dev);
 175         sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
 176
 177         while (sk) {
 178                 int filtered;
 179
 180                 delivered = 1;
 181                 switch (nexthdr) {
 182                 case IPPROTO_ICMPV6:
 183                         filtered = icmpv6_filter(sk, skb);
 184                         break;
 185
 186 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 187                 case IPPROTO_MH:
 188                 {
 189                         /* XXX: To validate MH only once for each packet,
 190                          * this is placed here. It should be after checking
 191                          * xfrm policy, however it doesn't. The checking xfrm
 192                          * policy is placed in rawv6_rcv() because it is
 193                          * required for each socket.
 194                          */
 195                         int (*filter)(struct sock *sock, struct sk_buff *skb);
 196
 197                         filter = rcu_dereference(mh_filter);
 198                         filtered = filter ? filter(sk, skb) : 0;
 199                         break;
 200                 }
 201 #endif
 202                 default:
 203                         filtered = 0;
 204                         break;
 205                 }
 206
 207                 if (filtered < 0)
 208                         break;
 209                 if (filtered == 0) {
 210                         struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
 211
 212                         /* Not releasing hash table! */
 213                         if (clone) {
 214                                 nf_reset(clone);
 215                                 rawv6_rcv(sk, clone);
 216                         }
 217                 }
 218                 sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
 219                                      IP6CB(skb)->iif);
 220         }
 221 out:
 222         read_unlock(&raw_v6_hashinfo.lock);
 223         return delivered;
 224 }
 225
 226 int raw6_local_deliver(struct sk_buff *skb, int nexthdr)
 227 {
 228         struct sock *raw_sk;
 229
 230         raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]);
 231         if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
 232                 raw_sk = NULL;
 233
 234         return raw_sk != NULL;
 235 }
 236
 237 /* This cleans up af_inet6 a bit. -DaveM */
 238 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 239 {
 240         struct inet_sock *inet = inet_sk(sk);
 241         struct ipv6_pinfo *np = inet6_sk(sk);
 242         struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
 243         __be32 v4addr = 0;
 244         int addr_type;
 245         int err;
 246
 247         if (addr_len < SIN6_LEN_RFC2133)
 248                 return -EINVAL;
 249         addr_type = ipv6_addr_type(&addr->sin6_addr);
 250
 251         /* Raw sockets are IPv6 only */
 252         if (addr_type == IPV6_ADDR_MAPPED)
 253                 return -EADDRNOTAVAIL;
 254
 255         lock_sock(sk);
 256
 257         err = -EINVAL;
 258         if (sk->sk_state != TCP_CLOSE)
 259                 goto out;
 260
 261         rcu_read_lock();
 262         /* Check if the address belongs to the host. */
 263         if (addr_type != IPV6_ADDR_ANY) {
 264                 struct net_device *dev = NULL;
 265
 266                 if (addr_type & IPV6_ADDR_LINKLOCAL) {
 267                         if (addr_len >= sizeof(struct sockaddr_in6) &&
 268                             addr->sin6_scope_id) {
 269                                 /* Override any existing binding, if another
 270                                  * one is supplied by user.
 271                                  */
 272                                 sk->sk_bound_dev_if = addr->sin6_scope_id;
 273                         }
 274
 275                         /* Binding to link-local address requires an interface */
 276                         if (!sk->sk_bound_dev_if)
 277                                 goto out_unlock;
 278
 279                         err = -ENODEV;
 280                         dev = dev_get_by_index_rcu(sock_net(sk),
 281                                                    sk->sk_bound_dev_if);
 282                         if (!dev)
 283                                 goto out_unlock;
 284                 }
 285
 286                 /* ipv4 addr of the socket is invalid.  Only the
 287                  * unspecified and mapped address have a v4 equivalent.
 288                  */
 289                 v4addr = LOOPBACK4_IPV6;
 290                 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
 291                         err = -EADDRNOTAVAIL;
 292                         if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
 293                                            dev, 0)) {
 294                                 goto out_unlock;
 295                         }
 296                 }
 297         }
 298
 299         inet->inet_rcv_saddr = inet->inet_saddr = v4addr;
 300         ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
 301         if (!(addr_type & IPV6_ADDR_MULTICAST))
 302                 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
 303         err = 0;
 304 out_unlock:
 305         rcu_read_unlock();
 306 out:
 307         release_sock(sk);
 308         return err;
 309 }
 310
 311 static void rawv6_err(struct sock *sk, struct sk_buff *skb,
 312                struct inet6_skb_parm *opt,
 313                u8 type, u8 code, int offset, __be32 info)
 314 {
 315         struct inet_sock *inet = inet_sk(sk);
 316         struct ipv6_pinfo *np = inet6_sk(sk);
 317         int err;
 318         int harderr;
 319
 320         /* Report error on raw socket, if:
 321            1. User requested recverr.
 322            2. Socket is connected (otherwise the error indication
 323               is useless without recverr and error is hard.
 324          */
 325         if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
 326                 return;
 327
 328         harderr = icmpv6_err_convert(type, code, &err);
 329         if (type == ICMPV6_PKT_TOOBIG)
 330                 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
 331
 332         if (np->recverr) {
 333                 u8 *payload = skb->data;
 334                 if (!inet->hdrincl)
 335                         payload += offset;
 336                 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
 337         }
 338
 339         if (np->recverr || harderr) {
 340                 sk->sk_err = err;
 341                 sk->sk_error_report(sk);
 342         }
 343 }
 344
 345 void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
 346                 u8 type, u8 code, int inner_offset, __be32 info)
 347 {
 348         struct sock *sk;
 349         int hash;
 350         struct in6_addr *saddr, *daddr;
 351         struct net *net;
 352
 353         hash = nexthdr & (RAW_HTABLE_SIZE - 1);
 354
 355         read_lock(&raw_v6_hashinfo.lock);
 356         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 357         if (sk != NULL) {
 358                 /* Note: ipv6_hdr(skb) != skb->data */
 359                 struct ipv6hdr *ip6h = (struct ipv6hdr *)skb->data;
 360                 saddr = &ip6h->saddr;
 361                 daddr = &ip6h->daddr;
 362                 net = dev_net(skb->dev);
 363
 364                 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
 365                                                 IP6CB(skb)->iif))) {
 366                         rawv6_err(sk, skb, NULL, type, code,
 367                                         inner_offset, info);
 368                         sk = sk_next(sk);
 369                 }
 370         }
 371         read_unlock(&raw_v6_hashinfo.lock);
 372 }
 373
 374 static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
 375 {
 376         if ((raw6_sk(sk)->checksum || rcu_dereference_raw(sk->sk_filter)) &&
 377             skb_checksum_complete(skb)) {
 378                 atomic_inc(&sk->sk_drops);
 379                 kfree_skb(skb);
 380                 return NET_RX_DROP;
 381         }
 382
 383         /* Charge it to the socket. */
 384         if (ip_queue_rcv_skb(sk, skb) < 0) {
 385                 kfree_skb(skb);
 386                 return NET_RX_DROP;
 387         }
 388
 389         return 0;
 390 }
 391
 392 /*
 393  *      This is next to useless...
 394  *      if we demultiplex in network layer we don't need the extra call
 395  *      just to queue the skb...
 396  *      maybe we could have the network decide upon a hint if it
 397  *      should call raw_rcv for demultiplexing
 398  */
 399 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
 400 {
 401         struct inet_sock *inet = inet_sk(sk);
 402         struct raw6_sock *rp = raw6_sk(sk);
 403
 404         if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
 405                 atomic_inc(&sk->sk_drops);
 406                 kfree_skb(skb);
 407                 return NET_RX_DROP;
 408         }
 409
 410         if (!rp->checksum)
 411                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 412
 413         if (skb->ip_summed == CHECKSUM_COMPLETE) {
 414                 skb_postpull_rcsum(skb, skb_network_header(skb),
 415                                    skb_network_header_len(skb));
 416                 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 417                                      &ipv6_hdr(skb)->daddr,
 418                                      skb->len, inet->inet_num, skb->csum))
 419                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 420         }
 421         if (!skb_csum_unnecessary(skb))
 422                 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 423                                                          &ipv6_hdr(skb)->daddr,
 424                                                          skb->len,
 425                                                          inet->inet_num, 0));
 426
 427         if (inet->hdrincl) {
 428                 if (skb_checksum_complete(skb)) {
 429                         atomic_inc(&sk->sk_drops);
 430                         kfree_skb(skb);
 431                         return NET_RX_DROP;
 432                 }
 433         }
 434
 435         rawv6_rcv_skb(sk, skb);
 436         return 0;
 437 }
 438
 439
 440 /*
 441  *      This should be easy, if there is something there
 442  *      we return it, otherwise we block.
 443  */
 444
 445 static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
 446                   struct msghdr *msg, size_t len,
 447                   int noblock, int flags, int *addr_len)
 448 {
 449         struct ipv6_pinfo *np = inet6_sk(sk);
 450         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
 451         struct sk_buff *skb;
 452         size_t copied;
 453         int err;
 454
 455         if (flags & MSG_OOB)
 456                 return -EOPNOTSUPP;
 457
 458         if (addr_len)
 459                 *addr_len=sizeof(*sin6);
 460
 461         if (flags & MSG_ERRQUEUE)
 462                 return ipv6_recv_error(sk, msg, len);
 463
 464         if (np->rxpmtu && np->rxopt.bits.rxpmtu)
 465                 return ipv6_recv_rxpmtu(sk, msg, len);
 466
 467         skb = skb_recv_datagram(sk, flags, noblock, &err);
 468         if (!skb)
 469                 goto out;
 470
 471         copied = skb->len;
 472         if (copied > len) {
 473                 copied = len;
 474                 msg->msg_flags |= MSG_TRUNC;
 475         }
 476
 477         if (skb_csum_unnecessary(skb)) {
 478                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 479         } else if (msg->msg_flags&MSG_TRUNC) {
 480                 if (__skb_checksum_complete(skb))
 481                         goto csum_copy_err;
 482                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 483         } else {
 484                 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
 485                 if (err == -EINVAL)
 486                         goto csum_copy_err;
 487         }
 488         if (err)
 489                 goto out_free;
 490
 491         /* Copy the address. */
 492         if (sin6) {
 493                 sin6->sin6_family = AF_INET6;
 494                 sin6->sin6_port = 0;
 495                 ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr);
 496                 sin6->sin6_flowinfo = 0;
 497                 sin6->sin6_scope_id = 0;
 498                 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
 499                         sin6->sin6_scope_id = IP6CB(skb)->iif;
 500         }
 501
 502         sock_recv_ts_and_drops(msg, sk, skb);
 503
 504         if (np->rxopt.all)
 505                 datagram_recv_ctl(sk, msg, skb);
 506
 507         err = copied;
 508         if (flags & MSG_TRUNC)
 509                 err = skb->len;
 510
 511 out_free:
 512         skb_free_datagram(sk, skb);
 513 out:
 514         return err;
 515
 516 csum_copy_err:
 517         skb_kill_datagram(sk, skb, flags);
 518
 519         /* Error for blocking case is chosen to masquerade
 520            as some normal condition.
 521          */
 522         err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
 523         goto out;
 524 }
 525
 526 static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
 527                                      struct raw6_sock *rp)
 528 {
 529         struct sk_buff *skb;
 530         int err = 0;
 531         int offset;
 532         int len;
 533         int total_len;
 534         __wsum tmp_csum;
 535         __sum16 csum;
 536
 537         if (!rp->checksum)
 538                 goto send;
 539
 540         if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
 541                 goto out;
 542
 543         offset = rp->offset;
 544         total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) -
 545                                                 skb->data);
 546         if (offset >= total_len - 1) {
 547                 err = -EINVAL;
 548                 ip6_flush_pending_frames(sk);
 549                 goto out;
 550         }
 551
 552         /* should be check HW csum miyazawa */
 553         if (skb_queue_len(&sk->sk_write_queue) == 1) {
 554                 /*
 555                  * Only one fragment on the socket.
 556                  */
 557                 tmp_csum = skb->csum;
 558         } else {
 559                 struct sk_buff *csum_skb = NULL;
 560                 tmp_csum = 0;
 561
 562                 skb_queue_walk(&sk->sk_write_queue, skb) {
 563                         tmp_csum = csum_add(tmp_csum, skb->csum);
 564
 565                         if (csum_skb)
 566                                 continue;
 567
 568                         len = skb->len - skb_transport_offset(skb);
 569                         if (offset >= len) {
 570                                 offset -= len;
 571                                 continue;
 572                         }
 573
 574                         csum_skb = skb;
 575                 }
 576
 577                 skb = csum_skb;
 578         }
 579
 580         offset += skb_transport_offset(skb);
 581         if (skb_copy_bits(skb, offset, &csum, 2))
 582                 BUG();
 583
 584         /* in case cksum was not initialized */
 585         if (unlikely(csum))
 586                 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
 587
 588         csum = csum_ipv6_magic(&fl->fl6_src,
 589                                    &fl->fl6_dst,
 590                                    total_len, fl->proto, tmp_csum);
 591
 592         if (csum == 0 && fl->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 flowi *fl, 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, fl, 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 flowi *fl, 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 (fl->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(fl->fl_icmp_type, type) ||
 697                                     get_user(fl->fl_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(fl->fl_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 flowi fl;
 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(&fl, 0, sizeof(fl));
 759
 760         fl.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                         fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
 783                         if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
 784                                 flowlabel = fl6_sock_lookup(sk, fl.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                         fl.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                 fl.fl6_flowlabel = np->flow_label;
 810         }
 811
 812         if (fl.oif == 0)
 813                 fl.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), msg, &fl, opt, &hlimit,
 821                                         &tclass, &dontfrag);
 822                 if (err < 0) {
 823                         fl6_sock_release(flowlabel);
 824                         return err;
 825                 }
 826                 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
 827                         flowlabel = fl6_sock_lookup(sk, fl.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         fl.proto = proto;
 841         err = rawv6_probe_proto_opt(&fl, msg);
 842         if (err)
 843                 goto out;
 844
 845         if (!ipv6_addr_any(daddr))
 846                 ipv6_addr_copy(&fl.fl6_dst, daddr);
 847         else
 848                 fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
 849         if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
 850                 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
 851
 852         final_p = fl6_update_dst(&fl, opt, &final);
 853
 854         if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
 855                 fl.oif = np->mcast_oif;
 856         security_sk_classify_flow(sk, &fl);
 857
 858         err = ip6_dst_lookup(sk, &dst, &fl);
 859         if (err)
 860                 goto out;
 861         if (final_p)
 862                 ipv6_addr_copy(&fl.fl6_dst, final_p);
 863
 864         err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT);
 865         if (err < 0) {
 866                 if (err == -EREMOTE)
 867                         err = ip6_dst_blackhole(sk, &dst, &fl);
 868                 if (err < 0)
 869                         goto out;
 870         }
 871
 872         if (hlimit < 0) {
 873                 if (ipv6_addr_is_multicast(&fl.fl6_dst))
 874                         hlimit = np->mcast_hops;
 875                 else
 876                         hlimit = np->hop_limit;
 877                 if (hlimit < 0)
 878                         hlimit = ip6_dst_hoplimit(dst);
 879         }
 880
 881         if (tclass < 0)
 882                 tclass = np->tclass;
 883
 884         if (dontfrag < 0)
 885                 dontfrag = np->dontfrag;
 886
 887         if (msg->msg_flags&MSG_CONFIRM)
 888                 goto do_confirm;
 889
 890 back_from_confirm:
 891         if (inet->hdrincl)
 892                 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, &dst, msg->msg_flags);
 893         else {
 894                 lock_sock(sk);
 895                 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
 896                         len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
 897                         msg->msg_flags, dontfrag);
 898
 899                 if (err)
 900                         ip6_flush_pending_frames(sk);
 901                 else if (!(msg->msg_flags & MSG_MORE))
 902                         err = rawv6_push_pending_frames(sk, &fl, rp);
 903                 release_sock(sk);
 904         }
 905 done:
 906         dst_release(dst);
 907 out:
 908         fl6_sock_release(flowlabel);
 909         return err<0?err:len;
 910 do_confirm:
 911         dst_confirm(dst);
 912         if (!(msg->msg_flags & MSG_PROBE) || len)
 913                 goto back_from_confirm;
 914         err = 0;
 915         goto done;
 916 }
 917
 918 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
 919                                char __user *optval, int optlen)
 920 {
 921         switch (optname) {
 922         case ICMPV6_FILTER:
 923                 if (optlen > sizeof(struct icmp6_filter))
 924                         optlen = sizeof(struct icmp6_filter);
 925                 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
 926                         return -EFAULT;
 927                 return 0;
 928         default:
 929                 return -ENOPROTOOPT;
 930         }
 931
 932         return 0;
 933 }
 934
 935 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
 936                                char __user *optval, int __user *optlen)
 937 {
 938         int len;
 939
 940         switch (optname) {
 941         case ICMPV6_FILTER:
 942                 if (get_user(len, optlen))
 943                         return -EFAULT;
 944                 if (len < 0)
 945                         return -EINVAL;
 946                 if (len > sizeof(struct icmp6_filter))
 947                         len = sizeof(struct icmp6_filter);
 948                 if (put_user(len, optlen))
 949                         return -EFAULT;
 950                 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
 951                         return -EFAULT;
 952                 return 0;
 953         default:
 954                 return -ENOPROTOOPT;
 955         }
 956
 957         return 0;
 958 }
 959
 960
 961 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
 962                             char __user *optval, unsigned int optlen)
 963 {
 964         struct raw6_sock *rp = raw6_sk(sk);
 965         int val;
 966
 967         if (get_user(val, (int __user *)optval))
 968                 return -EFAULT;
 969
 970         switch (optname) {
 971                 case IPV6_CHECKSUM:
 972                         if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
 973                             level == IPPROTO_IPV6) {
 974                                 /*
 975                                  * RFC3542 tells that IPV6_CHECKSUM socket
 976                                  * option in the IPPROTO_IPV6 level is not
 977                                  * allowed on ICMPv6 sockets.
 978                                  * If you want to set it, use IPPROTO_RAW
 979                                  * level IPV6_CHECKSUM socket option
 980                                  * (Linux extension).
 981                                  */
 982                                 return -EINVAL;
 983                         }
 984
 985                         /* You may get strange result with a positive odd offset;
 986                            RFC2292bis agrees with me. */
 987                         if (val > 0 && (val&1))
 988                                 return -EINVAL;
 989                         if (val < 0) {
 990                                 rp->checksum = 0;
 991                         } else {
 992                                 rp->checksum = 1;
 993                                 rp->offset = val;
 994                         }
 995
 996                         return 0;
 997                         break;
 998
 999                 default:
1000                         return -ENOPROTOOPT;
1001         }
1002 }
1003
1004 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1005                           char __user *optval, unsigned int optlen)
1006 {
1007         switch(level) {
1008                 case SOL_RAW:
1009                         break;
1010
1011                 case SOL_ICMPV6:
1012                         if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1013                                 return -EOPNOTSUPP;
1014                         return rawv6_seticmpfilter(sk, level, optname, optval,
1015                                                    optlen);
1016                 case SOL_IPV6:
1017                         if (optname == IPV6_CHECKSUM)
1018                                 break;
1019                 default:
1020                         return ipv6_setsockopt(sk, level, optname, optval,
1021                                                optlen);
1022         }
1023
1024         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1025 }
1026
1027 #ifdef CONFIG_COMPAT
1028 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1029                                    char __user *optval, unsigned int optlen)
1030 {
1031         switch (level) {
1032         case SOL_RAW:
1033                 break;
1034         case SOL_ICMPV6:
1035                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1036                         return -EOPNOTSUPP;
1037                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1038         case SOL_IPV6:
1039                 if (optname == IPV6_CHECKSUM)
1040                         break;
1041         default:
1042                 return compat_ipv6_setsockopt(sk, level, optname,
1043                                               optval, optlen);
1044         }
1045         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1046 }
1047 #endif
1048
1049 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1050                             char __user *optval, int __user *optlen)
1051 {
1052         struct raw6_sock *rp = raw6_sk(sk);
1053         int val, len;
1054
1055         if (get_user(len,optlen))
1056                 return -EFAULT;
1057
1058         switch (optname) {
1059         case IPV6_CHECKSUM:
1060                 /*
1061                  * We allow getsockopt() for IPPROTO_IPV6-level
1062                  * IPV6_CHECKSUM socket option on ICMPv6 sockets
1063                  * since RFC3542 is silent about it.
1064                  */
1065                 if (rp->checksum == 0)
1066                         val = -1;
1067                 else
1068                         val = rp->offset;
1069                 break;
1070
1071         default:
1072                 return -ENOPROTOOPT;
1073         }
1074
1075         len = min_t(unsigned int, sizeof(int), len);
1076
1077         if (put_user(len, optlen))
1078                 return -EFAULT;
1079         if (copy_to_user(optval,&val,len))
1080                 return -EFAULT;
1081         return 0;
1082 }
1083
1084 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1085                           char __user *optval, int __user *optlen)
1086 {
1087         switch(level) {
1088                 case SOL_RAW:
1089                         break;
1090
1091                 case SOL_ICMPV6:
1092                         if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1093                                 return -EOPNOTSUPP;
1094                         return rawv6_geticmpfilter(sk, level, optname, optval,
1095                                                    optlen);
1096                 case SOL_IPV6:
1097                         if (optname == IPV6_CHECKSUM)
1098                                 break;
1099                 default:
1100                         return ipv6_getsockopt(sk, level, optname, optval,
1101                                                optlen);
1102         }
1103
1104         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1105 }
1106
1107 #ifdef CONFIG_COMPAT
1108 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1109                                    char __user *optval, int __user *optlen)
1110 {
1111         switch (level) {
1112         case SOL_RAW:
1113                 break;
1114         case SOL_ICMPV6:
1115                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1116                         return -EOPNOTSUPP;
1117                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1118         case SOL_IPV6:
1119                 if (optname == IPV6_CHECKSUM)
1120                         break;
1121         default:
1122                 return compat_ipv6_getsockopt(sk, level, optname,
1123                                               optval, optlen);
1124         }
1125         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1126 }
1127 #endif
1128
1129 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1130 {
1131         switch(cmd) {
1132                 case SIOCOUTQ:
1133                 {
1134                         int amount = sk_wmem_alloc_get(sk);
1135
1136                         return put_user(amount, (int __user *)arg);
1137                 }
1138                 case SIOCINQ:
1139                 {
1140                         struct sk_buff *skb;
1141                         int amount = 0;
1142
1143                         spin_lock_bh(&sk->sk_receive_queue.lock);
1144                         skb = skb_peek(&sk->sk_receive_queue);
1145                         if (skb != NULL)
1146                                 amount = skb->tail - skb->transport_header;
1147                         spin_unlock_bh(&sk->sk_receive_queue.lock);
1148                         return put_user(amount, (int __user *)arg);
1149                 }
1150
1151                 default:
1152 #ifdef CONFIG_IPV6_MROUTE
1153                         return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1154 #else
1155                         return -ENOIOCTLCMD;
1156 #endif
1157         }
1158 }
1159
1160 static void rawv6_close(struct sock *sk, long timeout)
1161 {
1162         if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1163                 ip6_ra_control(sk, -1);
1164         ip6mr_sk_done(sk);
1165         sk_common_release(sk);
1166 }
1167
1168 static void raw6_destroy(struct sock *sk)
1169 {
1170         lock_sock(sk);
1171         ip6_flush_pending_frames(sk);
1172         release_sock(sk);
1173
1174         inet6_destroy_sock(sk);
1175 }
1176
1177 static int rawv6_init_sk(struct sock *sk)
1178 {
1179         struct raw6_sock *rp = raw6_sk(sk);
1180
1181         switch (inet_sk(sk)->inet_num) {
1182         case IPPROTO_ICMPV6:
1183                 rp->checksum = 1;
1184                 rp->offset   = 2;
1185                 break;
1186         case IPPROTO_MH:
1187                 rp->checksum = 1;
1188                 rp->offset   = 4;
1189                 break;
1190         default:
1191                 break;
1192         }
1193         return 0;
1194 }
1195
1196 struct proto rawv6_prot = {
1197         .name              = "RAWv6",
1198         .owner             = THIS_MODULE,
1199         .close             = rawv6_close,
1200         .destroy           = raw6_destroy,
1201         .connect           = ip6_datagram_connect,
1202         .disconnect        = udp_disconnect,
1203         .ioctl             = rawv6_ioctl,
1204         .init              = rawv6_init_sk,
1205         .setsockopt        = rawv6_setsockopt,
1206         .getsockopt        = rawv6_getsockopt,
1207         .sendmsg           = rawv6_sendmsg,
1208         .recvmsg           = rawv6_recvmsg,
1209         .bind              = rawv6_bind,
1210         .backlog_rcv       = rawv6_rcv_skb,
1211         .hash              = raw_hash_sk,
1212         .unhash            = raw_unhash_sk,
1213         .obj_size          = sizeof(struct raw6_sock),
1214         .h.raw_hash        = &raw_v6_hashinfo,
1215 #ifdef CONFIG_COMPAT
1216         .compat_setsockopt = compat_rawv6_setsockopt,
1217         .compat_getsockopt = compat_rawv6_getsockopt,
1218 #endif
1219 };
1220
1221 #ifdef CONFIG_PROC_FS
1222 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1223 {
1224         struct ipv6_pinfo *np = inet6_sk(sp);
1225         struct in6_addr *dest, *src;
1226         __u16 destp, srcp;
1227
1228         dest  = &np->daddr;
1229         src   = &np->rcv_saddr;
1230         destp = 0;
1231         srcp  = inet_sk(sp)->inet_num;
1232         seq_printf(seq,
1233                    "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1234                    "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
1235                    i,
1236                    src->s6_addr32[0], src->s6_addr32[1],
1237                    src->s6_addr32[2], src->s6_addr32[3], srcp,
1238                    dest->s6_addr32[0], dest->s6_addr32[1],
1239                    dest->s6_addr32[2], dest->s6_addr32[3], destp,
1240                    sp->sk_state,
1241                    sk_wmem_alloc_get(sp),
1242                    sk_rmem_alloc_get(sp),
1243                    0, 0L, 0,
1244                    sock_i_uid(sp), 0,
1245                    sock_i_ino(sp),
1246                    atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1247 }
1248
1249 static int raw6_seq_show(struct seq_file *seq, void *v)
1250 {
1251         if (v == SEQ_START_TOKEN)
1252                 seq_printf(seq,
1253                            "  sl  "
1254                            "local_address                         "
1255                            "remote_address                        "
1256                            "st tx_queue rx_queue tr tm->when retrnsmt"
1257                            "   uid  timeout inode ref pointer drops\n");
1258         else
1259                 raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1260         return 0;
1261 }
1262
1263 static const struct seq_operations raw6_seq_ops = {
1264         .start =        raw_seq_start,
1265         .next =         raw_seq_next,
1266         .stop =         raw_seq_stop,
1267         .show =         raw6_seq_show,
1268 };
1269
1270 static int raw6_seq_open(struct inode *inode, struct file *file)
1271 {
1272         return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1273 }
1274
1275 static const struct file_operations raw6_seq_fops = {
1276         .owner =        THIS_MODULE,
1277         .open =         raw6_seq_open,
1278         .read =         seq_read,
1279         .llseek =       seq_lseek,
1280         .release =      seq_release_net,
1281 };
1282
1283 static int __net_init raw6_init_net(struct net *net)
1284 {
1285         if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops))
1286                 return -ENOMEM;
1287
1288         return 0;
1289 }
1290
1291 static void __net_exit raw6_exit_net(struct net *net)
1292 {
1293         proc_net_remove(net, "raw6");
1294 }
1295
1296 static struct pernet_operations raw6_net_ops = {
1297         .init = raw6_init_net,
1298         .exit = raw6_exit_net,
1299 };
1300
1301 int __init raw6_proc_init(void)
1302 {
1303         return register_pernet_subsys(&raw6_net_ops);
1304 }
1305
1306 void raw6_proc_exit(void)
1307 {
1308         unregister_pernet_subsys(&raw6_net_ops);
1309 }
1310 #endif  /* CONFIG_PROC_FS */
1311
1312 /* Same as inet6_dgram_ops, sans udp_poll.  */
1313 static const struct proto_ops inet6_sockraw_ops = {
1314         .family            = PF_INET6,
1315         .owner             = THIS_MODULE,
1316         .release           = inet6_release,
1317         .bind              = inet6_bind,
1318         .connect           = inet_dgram_connect,        /* ok           */
1319         .socketpair        = sock_no_socketpair,        /* a do nothing */
1320         .accept            = sock_no_accept,            /* a do nothing */
1321         .getname           = inet6_getname,
1322         .poll              = datagram_poll,             /* ok           */
1323         .ioctl             = inet6_ioctl,               /* must change  */
1324         .listen            = sock_no_listen,            /* ok           */
1325         .shutdown          = inet_shutdown,             /* ok           */
1326         .setsockopt        = sock_common_setsockopt,    /* ok           */
1327         .getsockopt        = sock_common_getsockopt,    /* ok           */
1328         .sendmsg           = inet_sendmsg,              /* ok           */
1329         .recvmsg           = sock_common_recvmsg,       /* ok           */
1330         .mmap              = sock_no_mmap,
1331         .sendpage          = sock_no_sendpage,
1332 #ifdef CONFIG_COMPAT
1333         .compat_setsockopt = compat_sock_common_setsockopt,
1334         .compat_getsockopt = compat_sock_common_getsockopt,
1335 #endif
1336 };
1337
1338 static struct inet_protosw rawv6_protosw = {
1339         .type           = SOCK_RAW,
1340         .protocol       = IPPROTO_IP,   /* wild card */
1341         .prot           = &rawv6_prot,
1342         .ops            = &inet6_sockraw_ops,
1343         .no_check       = UDP_CSUM_DEFAULT,
1344         .flags          = INET_PROTOSW_REUSE,
1345 };
1346
1347 int __init rawv6_init(void)
1348 {
1349         int ret;
1350
1351         ret = inet6_register_protosw(&rawv6_protosw);
1352         if (ret)
1353                 goto out;
1354 out:
1355         return ret;
1356 }
1357
1358 void rawv6_exit(void)
1359 {
1360         inet6_unregister_protosw(&rawv6_protosw);
1361 }