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/sockios.h>
  25 #include <linux/net.h>
  26 #include <linux/in6.h>
  27 #include <linux/netdevice.h>
  28 #include <linux/if_arp.h>
  29 #include <linux/icmpv6.h>
  30 #include <linux/netfilter.h>
  31 #include <linux/netfilter_ipv6.h>
  32 #include <linux/skbuff.h>
  33 #include <asm/uaccess.h>
  34 #include <asm/ioctls.h>
  35
  36 #include <net/net_namespace.h>
  37 #include <net/ip.h>
  38 #include <net/sock.h>
  39 #include <net/snmp.h>
  40
  41 #include <net/ipv6.h>
  42 #include <net/ndisc.h>
  43 #include <net/protocol.h>
  44 #include <net/ip6_route.h>
  45 #include <net/ip6_checksum.h>
  46 #include <net/addrconf.h>
  47 #include <net/transp_v6.h>
  48 #include <net/udp.h>
  49 #include <net/inet_common.h>
  50 #include <net/tcp_states.h>
  51 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
  52 #include <net/mip6.h>
  53 #endif
  54 #include <linux/mroute6.h>
  55
  56 #include <net/raw.h>
  57 #include <net/rawv6.h>
  58 #include <net/xfrm.h>
  59
  60 #include <linux/proc_fs.h>
  61 #include <linux/seq_file.h>
  62
  63 static struct raw_hashinfo raw_v6_hashinfo = {
  64         .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
  65 };
  66
  67 static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
  68                 unsigned short num, struct in6_addr *loc_addr,
  69                 struct in6_addr *rmt_addr, int dif)
  70 {
  71         struct hlist_node *node;
  72         int is_multicast = ipv6_addr_is_multicast(loc_addr);
  73
  74         sk_for_each_from(sk, node)
  75                 if (inet_sk(sk)->inet_num == num) {
  76                         struct ipv6_pinfo *np = inet6_sk(sk);
  77
  78                         if (!net_eq(sock_net(sk), net))
  79                                 continue;
  80
  81                         if (!ipv6_addr_any(&np->daddr) &&
  82                             !ipv6_addr_equal(&np->daddr, rmt_addr))
  83                                 continue;
  84
  85                         if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
  86                                 continue;
  87
  88                         if (!ipv6_addr_any(&np->rcv_saddr)) {
  89                                 if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
  90                                         goto found;
  91                                 if (is_multicast &&
  92                                     inet6_mc_check(sk, loc_addr, rmt_addr))
  93                                         goto found;
  94                                 continue;
  95                         }
  96                         goto found;
  97                 }
  98         sk = NULL;
  99 found:
 100         return sk;
 101 }
 102
 103 /*
 104  *      0 - deliver
 105  *      1 - block
 106  */
 107 static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
 108 {
 109         struct icmp6hdr *icmph;
 110         struct raw6_sock *rp = raw6_sk(sk);
 111
 112         if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) {
 113                 __u32 *data = &rp->filter.data[0];
 114                 int bit_nr;
 115
 116                 icmph = (struct icmp6hdr *) skb->data;
 117                 bit_nr = icmph->icmp6_type;
 118
 119                 return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0;
 120         }
 121         return 0;
 122 }
 123
 124 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 125 static int (*mh_filter)(struct sock *sock, struct sk_buff *skb);
 126
 127 int rawv6_mh_filter_register(int (*filter)(struct sock *sock,
 128                                            struct sk_buff *skb))
 129 {
 130         rcu_assign_pointer(mh_filter, filter);
 131         return 0;
 132 }
 133 EXPORT_SYMBOL(rawv6_mh_filter_register);
 134
 135 int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock,
 136                                              struct sk_buff *skb))
 137 {
 138         rcu_assign_pointer(mh_filter, NULL);
 139         synchronize_rcu();
 140         return 0;
 141 }
 142 EXPORT_SYMBOL(rawv6_mh_filter_unregister);
 143
 144 #endif
 145
 146 /*
 147  *      demultiplex raw sockets.
 148  *      (should consider queueing the skb in the sock receive_queue
 149  *      without calling rawv6.c)
 150  *
 151  *      Caller owns SKB so we must make clones.
 152  */
 153 static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
 154 {
 155         struct in6_addr *saddr;
 156         struct in6_addr *daddr;
 157         struct sock *sk;
 158         int delivered = 0;
 159         __u8 hash;
 160         struct net *net;
 161
 162         saddr = &ipv6_hdr(skb)->saddr;
 163         daddr = saddr + 1;
 164
 165         hash = nexthdr & (MAX_INET_PROTOS - 1);
 166
 167         read_lock(&raw_v6_hashinfo.lock);
 168         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 169
 170         if (sk == NULL)
 171                 goto out;
 172
 173         net = dev_net(skb->dev);
 174         sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
 175
 176         while (sk) {
 177                 int filtered;
 178
 179                 delivered = 1;
 180                 switch (nexthdr) {
 181                 case IPPROTO_ICMPV6:
 182                         filtered = icmpv6_filter(sk, skb);
 183                         break;
 184
 185 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 186                 case IPPROTO_MH:
 187                 {
 188                         /* XXX: To validate MH only once for each packet,
 189                          * this is placed here. It should be after checking
 190                          * xfrm policy, however it doesn't. The checking xfrm
 191                          * policy is placed in rawv6_rcv() because it is
 192                          * required for each socket.
 193                          */
 194                         int (*filter)(struct sock *sock, struct sk_buff *skb);
 195
 196                         filter = rcu_dereference(mh_filter);
 197                         filtered = filter ? filter(sk, skb) : 0;
 198                         break;
 199                 }
 200 #endif
 201                 default:
 202                         filtered = 0;
 203                         break;
 204                 }
 205
 206                 if (filtered < 0)
 207                         break;
 208                 if (filtered == 0) {
 209                         struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
 210
 211                         /* Not releasing hash table! */
 212                         if (clone) {
 213                                 nf_reset(clone);
 214                                 rawv6_rcv(sk, clone);
 215                         }
 216                 }
 217                 sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
 218                                      IP6CB(skb)->iif);
 219         }
 220 out:
 221         read_unlock(&raw_v6_hashinfo.lock);
 222         return delivered;
 223 }
 224
 225 int raw6_local_deliver(struct sk_buff *skb, int nexthdr)
 226 {
 227         struct sock *raw_sk;
 228
 229         raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]);
 230         if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
 231                 raw_sk = NULL;
 232
 233         return raw_sk != NULL;
 234 }
 235
 236 /* This cleans up af_inet6 a bit. -DaveM */
 237 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 238 {
 239         struct inet_sock *inet = inet_sk(sk);
 240         struct ipv6_pinfo *np = inet6_sk(sk);
 241         struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
 242         __be32 v4addr = 0;
 243         int addr_type;
 244         int err;
 245
 246         if (addr_len < SIN6_LEN_RFC2133)
 247                 return -EINVAL;
 248         addr_type = ipv6_addr_type(&addr->sin6_addr);
 249
 250         /* Raw sockets are IPv6 only */
 251         if (addr_type == IPV6_ADDR_MAPPED)
 252                 return -EADDRNOTAVAIL;
 253
 254         lock_sock(sk);
 255
 256         err = -EINVAL;
 257         if (sk->sk_state != TCP_CLOSE)
 258                 goto out;
 259
 260         rcu_read_lock();
 261         /* Check if the address belongs to the host. */
 262         if (addr_type != IPV6_ADDR_ANY) {
 263                 struct net_device *dev = NULL;
 264
 265                 if (addr_type & IPV6_ADDR_LINKLOCAL) {
 266                         if (addr_len >= sizeof(struct sockaddr_in6) &&
 267                             addr->sin6_scope_id) {
 268                                 /* Override any existing binding, if another
 269                                  * one is supplied by user.
 270                                  */
 271                                 sk->sk_bound_dev_if = addr->sin6_scope_id;
 272                         }
 273
 274                         /* Binding to link-local address requires an interface */
 275                         if (!sk->sk_bound_dev_if)
 276                                 goto out_unlock;
 277
 278                         err = -ENODEV;
 279                         dev = dev_get_by_index_rcu(sock_net(sk),
 280                                                    sk->sk_bound_dev_if);
 281                         if (!dev)
 282                                 goto out_unlock;
 283                 }
 284
 285                 /* ipv4 addr of the socket is invalid.  Only the
 286                  * unspecified and mapped address have a v4 equivalent.
 287                  */
 288                 v4addr = LOOPBACK4_IPV6;
 289                 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
 290                         err = -EADDRNOTAVAIL;
 291                         if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
 292                                            dev, 0)) {
 293                                 goto out_unlock;
 294                         }
 295                 }
 296         }
 297
 298         inet->inet_rcv_saddr = inet->inet_saddr = v4addr;
 299         ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
 300         if (!(addr_type & IPV6_ADDR_MULTICAST))
 301                 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
 302         err = 0;
 303 out_unlock:
 304         rcu_read_unlock();
 305 out:
 306         release_sock(sk);
 307         return err;
 308 }
 309
 310 static void rawv6_err(struct sock *sk, struct sk_buff *skb,
 311                struct inet6_skb_parm *opt,
 312                u8 type, u8 code, int offset, __be32 info)
 313 {
 314         struct inet_sock *inet = inet_sk(sk);
 315         struct ipv6_pinfo *np = inet6_sk(sk);
 316         int err;
 317         int harderr;
 318
 319         /* Report error on raw socket, if:
 320            1. User requested recverr.
 321            2. Socket is connected (otherwise the error indication
 322               is useless without recverr and error is hard.
 323          */
 324         if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
 325                 return;
 326
 327         harderr = icmpv6_err_convert(type, code, &err);
 328         if (type == ICMPV6_PKT_TOOBIG)
 329                 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
 330
 331         if (np->recverr) {
 332                 u8 *payload = skb->data;
 333                 if (!inet->hdrincl)
 334                         payload += offset;
 335                 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
 336         }
 337
 338         if (np->recverr || harderr) {
 339                 sk->sk_err = err;
 340                 sk->sk_error_report(sk);
 341         }
 342 }
 343
 344 void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
 345                 u8 type, u8 code, int inner_offset, __be32 info)
 346 {
 347         struct sock *sk;
 348         int hash;
 349         struct in6_addr *saddr, *daddr;
 350         struct net *net;
 351
 352         hash = nexthdr & (RAW_HTABLE_SIZE - 1);
 353
 354         read_lock(&raw_v6_hashinfo.lock);
 355         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 356         if (sk != NULL) {
 357                 /* Note: ipv6_hdr(skb) != skb->data */
 358                 struct ipv6hdr *ip6h = (struct ipv6hdr *)skb->data;
 359                 saddr = &ip6h->saddr;
 360                 daddr = &ip6h->daddr;
 361                 net = dev_net(skb->dev);
 362
 363                 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
 364                                                 IP6CB(skb)->iif))) {
 365                         rawv6_err(sk, skb, NULL, type, code,
 366                                         inner_offset, info);
 367                         sk = sk_next(sk);
 368                 }
 369         }
 370         read_unlock(&raw_v6_hashinfo.lock);
 371 }
 372
 373 static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
 374 {
 375         if ((raw6_sk(sk)->checksum || sk->sk_filter) &&
 376             skb_checksum_complete(skb)) {
 377                 atomic_inc(&sk->sk_drops);
 378                 kfree_skb(skb);
 379                 return NET_RX_DROP;
 380         }
 381
 382         /* Charge it to the socket. */
 383         if (sock_queue_rcv_skb(sk, skb) < 0) {
 384                 kfree_skb(skb);
 385                 return NET_RX_DROP;
 386         }
 387
 388         return 0;
 389 }
 390
 391 /*
 392  *      This is next to useless...
 393  *      if we demultiplex in network layer we don't need the extra call
 394  *      just to queue the skb...
 395  *      maybe we could have the network decide upon a hint if it
 396  *      should call raw_rcv for demultiplexing
 397  */
 398 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
 399 {
 400         struct inet_sock *inet = inet_sk(sk);
 401         struct raw6_sock *rp = raw6_sk(sk);
 402
 403         if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
 404                 atomic_inc(&sk->sk_drops);
 405                 kfree_skb(skb);
 406                 return NET_RX_DROP;
 407         }
 408
 409         if (!rp->checksum)
 410                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 411
 412         if (skb->ip_summed == CHECKSUM_COMPLETE) {
 413                 skb_postpull_rcsum(skb, skb_network_header(skb),
 414                                    skb_network_header_len(skb));
 415                 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 416                                      &ipv6_hdr(skb)->daddr,
 417                                      skb->len, inet->inet_num, skb->csum))
 418                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 419         }
 420         if (!skb_csum_unnecessary(skb))
 421                 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 422                                                          &ipv6_hdr(skb)->daddr,
 423                                                          skb->len,
 424                                                          inet->inet_num, 0));
 425
 426         if (inet->hdrincl) {
 427                 if (skb_checksum_complete(skb)) {
 428                         atomic_inc(&sk->sk_drops);
 429                         kfree_skb(skb);
 430                         return NET_RX_DROP;
 431                 }
 432         }
 433
 434         rawv6_rcv_skb(sk, skb);
 435         return 0;
 436 }
 437
 438
 439 /*
 440  *      This should be easy, if there is something there
 441  *      we return it, otherwise we block.
 442  */
 443
 444 static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
 445                   struct msghdr *msg, size_t len,
 446                   int noblock, int flags, int *addr_len)
 447 {
 448         struct ipv6_pinfo *np = inet6_sk(sk);
 449         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
 450         struct sk_buff *skb;
 451         size_t copied;
 452         int err;
 453
 454         if (flags & MSG_OOB)
 455                 return -EOPNOTSUPP;
 456
 457         if (addr_len)
 458                 *addr_len=sizeof(*sin6);
 459
 460         if (flags & MSG_ERRQUEUE)
 461                 return ipv6_recv_error(sk, msg, len);
 462
 463         skb = skb_recv_datagram(sk, flags, noblock, &err);
 464         if (!skb)
 465                 goto out;
 466
 467         copied = skb->len;
 468         if (copied > len) {
 469                 copied = len;
 470                 msg->msg_flags |= MSG_TRUNC;
 471         }
 472
 473         if (skb_csum_unnecessary(skb)) {
 474                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 475         } else if (msg->msg_flags&MSG_TRUNC) {
 476                 if (__skb_checksum_complete(skb))
 477                         goto csum_copy_err;
 478                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 479         } else {
 480                 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
 481                 if (err == -EINVAL)
 482                         goto csum_copy_err;
 483         }
 484         if (err)
 485                 goto out_free;
 486
 487         /* Copy the address. */
 488         if (sin6) {
 489                 sin6->sin6_family = AF_INET6;
 490                 sin6->sin6_port = 0;
 491                 ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr);
 492                 sin6->sin6_flowinfo = 0;
 493                 sin6->sin6_scope_id = 0;
 494                 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
 495                         sin6->sin6_scope_id = IP6CB(skb)->iif;
 496         }
 497
 498         sock_recv_ts_and_drops(msg, sk, skb);
 499
 500         if (np->rxopt.all)
 501                 datagram_recv_ctl(sk, msg, skb);
 502
 503         err = copied;
 504         if (flags & MSG_TRUNC)
 505                 err = skb->len;
 506
 507 out_free:
 508         skb_free_datagram(sk, skb);
 509 out:
 510         return err;
 511
 512 csum_copy_err:
 513         skb_kill_datagram(sk, skb, flags);
 514
 515         /* Error for blocking case is chosen to masquerade
 516            as some normal condition.
 517          */
 518         err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
 519         goto out;
 520 }
 521
 522 static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
 523                                      struct raw6_sock *rp)
 524 {
 525         struct sk_buff *skb;
 526         int err = 0;
 527         int offset;
 528         int len;
 529         int total_len;
 530         __wsum tmp_csum;
 531         __sum16 csum;
 532
 533         if (!rp->checksum)
 534                 goto send;
 535
 536         if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
 537                 goto out;
 538
 539         offset = rp->offset;
 540         total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) -
 541                                                 skb->data);
 542         if (offset >= total_len - 1) {
 543                 err = -EINVAL;
 544                 ip6_flush_pending_frames(sk);
 545                 goto out;
 546         }
 547
 548         /* should be check HW csum miyazawa */
 549         if (skb_queue_len(&sk->sk_write_queue) == 1) {
 550                 /*
 551                  * Only one fragment on the socket.
 552                  */
 553                 tmp_csum = skb->csum;
 554         } else {
 555                 struct sk_buff *csum_skb = NULL;
 556                 tmp_csum = 0;
 557
 558                 skb_queue_walk(&sk->sk_write_queue, skb) {
 559                         tmp_csum = csum_add(tmp_csum, skb->csum);
 560
 561                         if (csum_skb)
 562                                 continue;
 563
 564                         len = skb->len - skb_transport_offset(skb);
 565                         if (offset >= len) {
 566                                 offset -= len;
 567                                 continue;
 568                         }
 569
 570                         csum_skb = skb;
 571                 }
 572
 573                 skb = csum_skb;
 574         }
 575
 576         offset += skb_transport_offset(skb);
 577         if (skb_copy_bits(skb, offset, &csum, 2))
 578                 BUG();
 579
 580         /* in case cksum was not initialized */
 581         if (unlikely(csum))
 582                 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
 583
 584         csum = csum_ipv6_magic(&fl->fl6_src,
 585                                    &fl->fl6_dst,
 586                                    total_len, fl->proto, tmp_csum);
 587
 588         if (csum == 0 && fl->proto == IPPROTO_UDP)
 589                 csum = CSUM_MANGLED_0;
 590
 591         if (skb_store_bits(skb, offset, &csum, 2))
 592                 BUG();
 593
 594 send:
 595         err = ip6_push_pending_frames(sk);
 596 out:
 597         return err;
 598 }
 599
 600 static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
 601                         struct flowi *fl, struct rt6_info *rt,
 602                         unsigned int flags)
 603 {
 604         struct ipv6_pinfo *np = inet6_sk(sk);
 605         struct ipv6hdr *iph;
 606         struct sk_buff *skb;
 607         int err;
 608
 609         if (length > rt->u.dst.dev->mtu) {
 610                 ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
 611                 return -EMSGSIZE;
 612         }
 613         if (flags&MSG_PROBE)
 614                 goto out;
 615
 616         skb = sock_alloc_send_skb(sk,
 617                                   length + LL_ALLOCATED_SPACE(rt->u.dst.dev) + 15,
 618                                   flags & MSG_DONTWAIT, &err);
 619         if (skb == NULL)
 620                 goto error;
 621         skb_reserve(skb, LL_RESERVED_SPACE(rt->u.dst.dev));
 622
 623         skb->priority = sk->sk_priority;
 624         skb->mark = sk->sk_mark;
 625         skb_dst_set(skb, dst_clone(&rt->u.dst));
 626
 627         skb_put(skb, length);
 628         skb_reset_network_header(skb);
 629         iph = ipv6_hdr(skb);
 630
 631         skb->ip_summed = CHECKSUM_NONE;
 632
 633         skb->transport_header = skb->network_header;
 634         err = memcpy_fromiovecend((void *)iph, from, 0, length);
 635         if (err)
 636                 goto error_fault;
 637
 638         IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
 639         err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
 640                       dst_output);
 641         if (err > 0)
 642                 err = net_xmit_errno(err);
 643         if (err)
 644                 goto error;
 645 out:
 646         return 0;
 647
 648 error_fault:
 649         err = -EFAULT;
 650         kfree_skb(skb);
 651 error:
 652         IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
 653         if (err == -ENOBUFS && !np->recverr)
 654                 err = 0;
 655         return err;
 656 }
 657
 658 static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
 659 {
 660         struct iovec *iov;
 661         u8 __user *type = NULL;
 662         u8 __user *code = NULL;
 663         u8 len = 0;
 664         int probed = 0;
 665         int i;
 666
 667         if (!msg->msg_iov)
 668                 return 0;
 669
 670         for (i = 0; i < msg->msg_iovlen; i++) {
 671                 iov = &msg->msg_iov[i];
 672                 if (!iov)
 673                         continue;
 674
 675                 switch (fl->proto) {
 676                 case IPPROTO_ICMPV6:
 677                         /* check if one-byte field is readable or not. */
 678                         if (iov->iov_base && iov->iov_len < 1)
 679                                 break;
 680
 681                         if (!type) {
 682                                 type = iov->iov_base;
 683                                 /* check if code field is readable or not. */
 684                                 if (iov->iov_len > 1)
 685                                         code = type + 1;
 686                         } else if (!code)
 687                                 code = iov->iov_base;
 688
 689                         if (type && code) {
 690                                 if (get_user(fl->fl_icmp_type, type) ||
 691                                     get_user(fl->fl_icmp_code, code))
 692                                         return -EFAULT;
 693                                 probed = 1;
 694                         }
 695                         break;
 696                 case IPPROTO_MH:
 697                         if (iov->iov_base && iov->iov_len < 1)
 698                                 break;
 699                         /* check if type field is readable or not. */
 700                         if (iov->iov_len > 2 - len) {
 701                                 u8 __user *p = iov->iov_base;
 702                                 if (get_user(fl->fl_mh_type, &p[2 - len]))
 703                                         return -EFAULT;
 704                                 probed = 1;
 705                         } else
 706                                 len += iov->iov_len;
 707
 708                         break;
 709                 default:
 710                         probed = 1;
 711                         break;
 712                 }
 713                 if (probed)
 714                         break;
 715         }
 716         return 0;
 717 }
 718
 719 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
 720                    struct msghdr *msg, size_t len)
 721 {
 722         struct ipv6_txoptions opt_space;
 723         struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
 724         struct in6_addr *daddr, *final_p = NULL, final;
 725         struct inet_sock *inet = inet_sk(sk);
 726         struct ipv6_pinfo *np = inet6_sk(sk);
 727         struct raw6_sock *rp = raw6_sk(sk);
 728         struct ipv6_txoptions *opt = NULL;
 729         struct ip6_flowlabel *flowlabel = NULL;
 730         struct dst_entry *dst = NULL;
 731         struct flowi fl;
 732         int addr_len = msg->msg_namelen;
 733         int hlimit = -1;
 734         int tclass = -1;
 735         u16 proto;
 736         int err;
 737
 738         /* Rough check on arithmetic overflow,
 739            better check is made in ip6_append_data().
 740          */
 741         if (len > INT_MAX)
 742                 return -EMSGSIZE;
 743
 744         /* Mirror BSD error message compatibility */
 745         if (msg->msg_flags & MSG_OOB)
 746                 return -EOPNOTSUPP;
 747
 748         /*
 749          *      Get and verify the address.
 750          */
 751         memset(&fl, 0, sizeof(fl));
 752
 753         fl.mark = sk->sk_mark;
 754
 755         if (sin6) {
 756                 if (addr_len < SIN6_LEN_RFC2133)
 757                         return -EINVAL;
 758
 759                 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
 760                         return(-EAFNOSUPPORT);
 761
 762                 /* port is the proto value [0..255] carried in nexthdr */
 763                 proto = ntohs(sin6->sin6_port);
 764
 765                 if (!proto)
 766                         proto = inet->inet_num;
 767                 else if (proto != inet->inet_num)
 768                         return(-EINVAL);
 769
 770                 if (proto > 255)
 771                         return(-EINVAL);
 772
 773                 daddr = &sin6->sin6_addr;
 774                 if (np->sndflow) {
 775                         fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
 776                         if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
 777                                 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
 778                                 if (flowlabel == NULL)
 779                                         return -EINVAL;
 780                                 daddr = &flowlabel->dst;
 781                         }
 782                 }
 783
 784                 /*
 785                  * Otherwise it will be difficult to maintain
 786                  * sk->sk_dst_cache.
 787                  */
 788                 if (sk->sk_state == TCP_ESTABLISHED &&
 789                     ipv6_addr_equal(daddr, &np->daddr))
 790                         daddr = &np->daddr;
 791
 792                 if (addr_len >= sizeof(struct sockaddr_in6) &&
 793                     sin6->sin6_scope_id &&
 794                     ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
 795                         fl.oif = sin6->sin6_scope_id;
 796         } else {
 797                 if (sk->sk_state != TCP_ESTABLISHED)
 798                         return -EDESTADDRREQ;
 799
 800                 proto = inet->inet_num;
 801                 daddr = &np->daddr;
 802                 fl.fl6_flowlabel = np->flow_label;
 803         }
 804
 805         if (fl.oif == 0)
 806                 fl.oif = sk->sk_bound_dev_if;
 807
 808         if (msg->msg_controllen) {
 809                 opt = &opt_space;
 810                 memset(opt, 0, sizeof(struct ipv6_txoptions));
 811                 opt->tot_len = sizeof(struct ipv6_txoptions);
 812
 813                 err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass);
 814                 if (err < 0) {
 815                         fl6_sock_release(flowlabel);
 816                         return err;
 817                 }
 818                 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
 819                         flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
 820                         if (flowlabel == NULL)
 821                                 return -EINVAL;
 822                 }
 823                 if (!(opt->opt_nflen|opt->opt_flen))
 824                         opt = NULL;
 825         }
 826         if (opt == NULL)
 827                 opt = np->opt;
 828         if (flowlabel)
 829                 opt = fl6_merge_options(&opt_space, flowlabel, opt);
 830         opt = ipv6_fixup_options(&opt_space, opt);
 831
 832         fl.proto = proto;
 833         err = rawv6_probe_proto_opt(&fl, msg);
 834         if (err)
 835                 goto out;
 836
 837         if (!ipv6_addr_any(daddr))
 838                 ipv6_addr_copy(&fl.fl6_dst, daddr);
 839         else
 840                 fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
 841         if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
 842                 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
 843
 844         /* merge ip6_build_xmit from ip6_output */
 845         if (opt && opt->srcrt) {
 846                 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
 847                 ipv6_addr_copy(&final, &fl.fl6_dst);
 848                 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
 849                 final_p = &final;
 850         }
 851
 852         if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
 853                 fl.oif = np->mcast_oif;
 854         security_sk_classify_flow(sk, &fl);
 855
 856         err = ip6_dst_lookup(sk, &dst, &fl);
 857         if (err)
 858                 goto out;
 859         if (final_p)
 860                 ipv6_addr_copy(&fl.fl6_dst, final_p);
 861
 862         err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT);
 863         if (err < 0) {
 864                 if (err == -EREMOTE)
 865                         err = ip6_dst_blackhole(sk, &dst, &fl);
 866                 if (err < 0)
 867                         goto out;
 868         }
 869
 870         if (hlimit < 0) {
 871                 if (ipv6_addr_is_multicast(&fl.fl6_dst))
 872                         hlimit = np->mcast_hops;
 873                 else
 874                         hlimit = np->hop_limit;
 875                 if (hlimit < 0)
 876                         hlimit = ip6_dst_hoplimit(dst);
 877         }
 878
 879         if (tclass < 0)
 880                 tclass = np->tclass;
 881
 882         if (msg->msg_flags&MSG_CONFIRM)
 883                 goto do_confirm;
 884
 885 back_from_confirm:
 886         if (inet->hdrincl) {
 887                 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
 888         } else {
 889                 lock_sock(sk);
 890                 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
 891                         len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
 892                         msg->msg_flags);
 893
 894                 if (err)
 895                         ip6_flush_pending_frames(sk);
 896                 else if (!(msg->msg_flags & MSG_MORE))
 897                         err = rawv6_push_pending_frames(sk, &fl, rp);
 898                 release_sock(sk);
 899         }
 900 done:
 901         dst_release(dst);
 902 out:
 903         fl6_sock_release(flowlabel);
 904         return err<0?err:len;
 905 do_confirm:
 906         dst_confirm(dst);
 907         if (!(msg->msg_flags & MSG_PROBE) || len)
 908                 goto back_from_confirm;
 909         err = 0;
 910         goto done;
 911 }
 912
 913 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
 914                                char __user *optval, int optlen)
 915 {
 916         switch (optname) {
 917         case ICMPV6_FILTER:
 918                 if (optlen > sizeof(struct icmp6_filter))
 919                         optlen = sizeof(struct icmp6_filter);
 920                 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
 921                         return -EFAULT;
 922                 return 0;
 923         default:
 924                 return -ENOPROTOOPT;
 925         }
 926
 927         return 0;
 928 }
 929
 930 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
 931                                char __user *optval, int __user *optlen)
 932 {
 933         int len;
 934
 935         switch (optname) {
 936         case ICMPV6_FILTER:
 937                 if (get_user(len, optlen))
 938                         return -EFAULT;
 939                 if (len < 0)
 940                         return -EINVAL;
 941                 if (len > sizeof(struct icmp6_filter))
 942                         len = sizeof(struct icmp6_filter);
 943                 if (put_user(len, optlen))
 944                         return -EFAULT;
 945                 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
 946                         return -EFAULT;
 947                 return 0;
 948         default:
 949                 return -ENOPROTOOPT;
 950         }
 951
 952         return 0;
 953 }
 954
 955
 956 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
 957                             char __user *optval, unsigned int optlen)
 958 {
 959         struct raw6_sock *rp = raw6_sk(sk);
 960         int val;
 961
 962         if (get_user(val, (int __user *)optval))
 963                 return -EFAULT;
 964
 965         switch (optname) {
 966                 case IPV6_CHECKSUM:
 967                         if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
 968                             level == IPPROTO_IPV6) {
 969                                 /*
 970                                  * RFC3542 tells that IPV6_CHECKSUM socket
 971                                  * option in the IPPROTO_IPV6 level is not
 972                                  * allowed on ICMPv6 sockets.
 973                                  * If you want to set it, use IPPROTO_RAW
 974                                  * level IPV6_CHECKSUM socket option
 975                                  * (Linux extension).
 976                                  */
 977                                 return -EINVAL;
 978                         }
 979
 980                         /* You may get strange result with a positive odd offset;
 981                            RFC2292bis agrees with me. */
 982                         if (val > 0 && (val&1))
 983                                 return(-EINVAL);
 984                         if (val < 0) {
 985                                 rp->checksum = 0;
 986                         } else {
 987                                 rp->checksum = 1;
 988                                 rp->offset = val;
 989                         }
 990
 991                         return 0;
 992                         break;
 993
 994                 default:
 995                         return(-ENOPROTOOPT);
 996         }
 997 }
 998
 999 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1000                           char __user *optval, unsigned int optlen)
1001 {
1002         switch(level) {
1003                 case SOL_RAW:
1004                         break;
1005
1006                 case SOL_ICMPV6:
1007                         if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1008                                 return -EOPNOTSUPP;
1009                         return rawv6_seticmpfilter(sk, level, optname, optval,
1010                                                    optlen);
1011                 case SOL_IPV6:
1012                         if (optname == IPV6_CHECKSUM)
1013                                 break;
1014                 default:
1015                         return ipv6_setsockopt(sk, level, optname, optval,
1016                                                optlen);
1017         }
1018
1019         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1020 }
1021
1022 #ifdef CONFIG_COMPAT
1023 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1024                                    char __user *optval, unsigned int optlen)
1025 {
1026         switch (level) {
1027         case SOL_RAW:
1028                 break;
1029         case SOL_ICMPV6:
1030                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1031                         return -EOPNOTSUPP;
1032                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1033         case SOL_IPV6:
1034                 if (optname == IPV6_CHECKSUM)
1035                         break;
1036         default:
1037                 return compat_ipv6_setsockopt(sk, level, optname,
1038                                               optval, optlen);
1039         }
1040         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1041 }
1042 #endif
1043
1044 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1045                             char __user *optval, int __user *optlen)
1046 {
1047         struct raw6_sock *rp = raw6_sk(sk);
1048         int val, len;
1049
1050         if (get_user(len,optlen))
1051                 return -EFAULT;
1052
1053         switch (optname) {
1054         case IPV6_CHECKSUM:
1055                 /*
1056                  * We allow getsockopt() for IPPROTO_IPV6-level
1057                  * IPV6_CHECKSUM socket option on ICMPv6 sockets
1058                  * since RFC3542 is silent about it.
1059                  */
1060                 if (rp->checksum == 0)
1061                         val = -1;
1062                 else
1063                         val = rp->offset;
1064                 break;
1065
1066         default:
1067                 return -ENOPROTOOPT;
1068         }
1069
1070         len = min_t(unsigned int, sizeof(int), len);
1071
1072         if (put_user(len, optlen))
1073                 return -EFAULT;
1074         if (copy_to_user(optval,&val,len))
1075                 return -EFAULT;
1076         return 0;
1077 }
1078
1079 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1080                           char __user *optval, int __user *optlen)
1081 {
1082         switch(level) {
1083                 case SOL_RAW:
1084                         break;
1085
1086                 case SOL_ICMPV6:
1087                         if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1088                                 return -EOPNOTSUPP;
1089                         return rawv6_geticmpfilter(sk, level, optname, optval,
1090                                                    optlen);
1091                 case SOL_IPV6:
1092                         if (optname == IPV6_CHECKSUM)
1093                                 break;
1094                 default:
1095                         return ipv6_getsockopt(sk, level, optname, optval,
1096                                                optlen);
1097         }
1098
1099         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1100 }
1101
1102 #ifdef CONFIG_COMPAT
1103 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1104                                    char __user *optval, int __user *optlen)
1105 {
1106         switch (level) {
1107         case SOL_RAW:
1108                 break;
1109         case SOL_ICMPV6:
1110                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1111                         return -EOPNOTSUPP;
1112                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1113         case SOL_IPV6:
1114                 if (optname == IPV6_CHECKSUM)
1115                         break;
1116         default:
1117                 return compat_ipv6_getsockopt(sk, level, optname,
1118                                               optval, optlen);
1119         }
1120         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1121 }
1122 #endif
1123
1124 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1125 {
1126         switch(cmd) {
1127                 case SIOCOUTQ:
1128                 {
1129                         int amount = sk_wmem_alloc_get(sk);
1130
1131                         return put_user(amount, (int __user *)arg);
1132                 }
1133                 case SIOCINQ:
1134                 {
1135                         struct sk_buff *skb;
1136                         int amount = 0;
1137
1138                         spin_lock_bh(&sk->sk_receive_queue.lock);
1139                         skb = skb_peek(&sk->sk_receive_queue);
1140                         if (skb != NULL)
1141                                 amount = skb->tail - skb->transport_header;
1142                         spin_unlock_bh(&sk->sk_receive_queue.lock);
1143                         return put_user(amount, (int __user *)arg);
1144                 }
1145
1146                 default:
1147 #ifdef CONFIG_IPV6_MROUTE
1148                         return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1149 #else
1150                         return -ENOIOCTLCMD;
1151 #endif
1152         }
1153 }
1154
1155 static void rawv6_close(struct sock *sk, long timeout)
1156 {
1157         if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1158                 ip6_ra_control(sk, -1);
1159         ip6mr_sk_done(sk);
1160         sk_common_release(sk);
1161 }
1162
1163 static void raw6_destroy(struct sock *sk)
1164 {
1165         lock_sock(sk);
1166         ip6_flush_pending_frames(sk);
1167         release_sock(sk);
1168
1169         inet6_destroy_sock(sk);
1170 }
1171
1172 static int rawv6_init_sk(struct sock *sk)
1173 {
1174         struct raw6_sock *rp = raw6_sk(sk);
1175
1176         switch (inet_sk(sk)->inet_num) {
1177         case IPPROTO_ICMPV6:
1178                 rp->checksum = 1;
1179                 rp->offset   = 2;
1180                 break;
1181         case IPPROTO_MH:
1182                 rp->checksum = 1;
1183                 rp->offset   = 4;
1184                 break;
1185         default:
1186                 break;
1187         }
1188         return(0);
1189 }
1190
1191 struct proto rawv6_prot = {
1192         .name              = "RAWv6",
1193         .owner             = THIS_MODULE,
1194         .close             = rawv6_close,
1195         .destroy           = raw6_destroy,
1196         .connect           = ip6_datagram_connect,
1197         .disconnect        = udp_disconnect,
1198         .ioctl             = rawv6_ioctl,
1199         .init              = rawv6_init_sk,
1200         .setsockopt        = rawv6_setsockopt,
1201         .getsockopt        = rawv6_getsockopt,
1202         .sendmsg           = rawv6_sendmsg,
1203         .recvmsg           = rawv6_recvmsg,
1204         .bind              = rawv6_bind,
1205         .backlog_rcv       = rawv6_rcv_skb,
1206         .hash              = raw_hash_sk,
1207         .unhash            = raw_unhash_sk,
1208         .obj_size          = sizeof(struct raw6_sock),
1209         .h.raw_hash        = &raw_v6_hashinfo,
1210 #ifdef CONFIG_COMPAT
1211         .compat_setsockopt = compat_rawv6_setsockopt,
1212         .compat_getsockopt = compat_rawv6_getsockopt,
1213 #endif
1214 };
1215
1216 #ifdef CONFIG_PROC_FS
1217 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1218 {
1219         struct ipv6_pinfo *np = inet6_sk(sp);
1220         struct in6_addr *dest, *src;
1221         __u16 destp, srcp;
1222
1223         dest  = &np->daddr;
1224         src   = &np->rcv_saddr;
1225         destp = 0;
1226         srcp  = inet_sk(sp)->inet_num;
1227         seq_printf(seq,
1228                    "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1229                    "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
1230                    i,
1231                    src->s6_addr32[0], src->s6_addr32[1],
1232                    src->s6_addr32[2], src->s6_addr32[3], srcp,
1233                    dest->s6_addr32[0], dest->s6_addr32[1],
1234                    dest->s6_addr32[2], dest->s6_addr32[3], destp,
1235                    sp->sk_state,
1236                    sk_wmem_alloc_get(sp),
1237                    sk_rmem_alloc_get(sp),
1238                    0, 0L, 0,
1239                    sock_i_uid(sp), 0,
1240                    sock_i_ino(sp),
1241                    atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1242 }
1243
1244 static int raw6_seq_show(struct seq_file *seq, void *v)
1245 {
1246         if (v == SEQ_START_TOKEN)
1247                 seq_printf(seq,
1248                            "  sl  "
1249                            "local_address                         "
1250                            "remote_address                        "
1251                            "st tx_queue rx_queue tr tm->when retrnsmt"
1252                            "   uid  timeout inode ref pointer drops\n");
1253         else
1254                 raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1255         return 0;
1256 }
1257
1258 static const struct seq_operations raw6_seq_ops = {
1259         .start =        raw_seq_start,
1260         .next =         raw_seq_next,
1261         .stop =         raw_seq_stop,
1262         .show =         raw6_seq_show,
1263 };
1264
1265 static int raw6_seq_open(struct inode *inode, struct file *file)
1266 {
1267         return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1268 }
1269
1270 static const struct file_operations raw6_seq_fops = {
1271         .owner =        THIS_MODULE,
1272         .open =         raw6_seq_open,
1273         .read =         seq_read,
1274         .llseek =       seq_lseek,
1275         .release =      seq_release_net,
1276 };
1277
1278 static int raw6_init_net(struct net *net)
1279 {
1280         if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops))
1281                 return -ENOMEM;
1282
1283         return 0;
1284 }
1285
1286 static void raw6_exit_net(struct net *net)
1287 {
1288         proc_net_remove(net, "raw6");
1289 }
1290
1291 static struct pernet_operations raw6_net_ops = {
1292         .init = raw6_init_net,
1293         .exit = raw6_exit_net,
1294 };
1295
1296 int __init raw6_proc_init(void)
1297 {
1298         return register_pernet_subsys(&raw6_net_ops);
1299 }
1300
1301 void raw6_proc_exit(void)
1302 {
1303         unregister_pernet_subsys(&raw6_net_ops);
1304 }
1305 #endif  /* CONFIG_PROC_FS */
1306
1307 /* Same as inet6_dgram_ops, sans udp_poll.  */
1308 static const struct proto_ops inet6_sockraw_ops = {
1309         .family            = PF_INET6,
1310         .owner             = THIS_MODULE,
1311         .release           = inet6_release,
1312         .bind              = inet6_bind,
1313         .connect           = inet_dgram_connect,        /* ok           */
1314         .socketpair        = sock_no_socketpair,        /* a do nothing */
1315         .accept            = sock_no_accept,            /* a do nothing */
1316         .getname           = inet6_getname,
1317         .poll              = datagram_poll,             /* ok           */
1318         .ioctl             = inet6_ioctl,               /* must change  */
1319         .listen            = sock_no_listen,            /* ok           */
1320         .shutdown          = inet_shutdown,             /* ok           */
1321         .setsockopt        = sock_common_setsockopt,    /* ok           */
1322         .getsockopt        = sock_common_getsockopt,    /* ok           */
1323         .sendmsg           = inet_sendmsg,              /* ok           */
1324         .recvmsg           = sock_common_recvmsg,       /* ok           */
1325         .mmap              = sock_no_mmap,
1326         .sendpage          = sock_no_sendpage,
1327 #ifdef CONFIG_COMPAT
1328         .compat_setsockopt = compat_sock_common_setsockopt,
1329         .compat_getsockopt = compat_sock_common_getsockopt,
1330 #endif
1331 };
1332
1333 static struct inet_protosw rawv6_protosw = {
1334         .type           = SOCK_RAW,
1335         .protocol       = IPPROTO_IP,   /* wild card */
1336         .prot           = &rawv6_prot,
1337         .ops            = &inet6_sockraw_ops,
1338         .no_check       = UDP_CSUM_DEFAULT,
1339         .flags          = INET_PROTOSW_REUSE,
1340 };
1341
1342 int __init rawv6_init(void)
1343 {
1344         int ret;
1345
1346         ret = inet6_register_protosw(&rawv6_protosw);
1347         if (ret)
1348                 goto out;
1349 out:
1350         return ret;
1351 }
1352
1353 void rawv6_exit(void)
1354 {
1355         inet6_unregister_protosw(&rawv6_protosw);
1356 }