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  *      $Id: raw.c,v 1.51 2002/02/01 22:01:04 davem Exp $
  11  *
  12  *      Fixes:
  13  *      Hideaki YOSHIFUJI       :       sin6_scope_id support
  14  *      YOSHIFUJI,H.@USAGI      :       raw checksum (RFC2292(bis) compliance)
  15  *      Kazunori MIYAZAWA @USAGI:       change process style to use ip6_append_data
  16  *
  17  *      This program is free software; you can redistribute it and/or
  18  *      modify it under the terms of the GNU General Public License
  19  *      as published by the Free Software Foundation; either version
  20  *      2 of the License, or (at your option) any later version.
  21  */
  22
  23 #include <linux/errno.h>
  24 #include <linux/types.h>
  25 #include <linux/socket.h>
  26 #include <linux/sockios.h>
  27 #include <linux/net.h>
  28 #include <linux/in6.h>
  29 #include <linux/netdevice.h>
  30 #include <linux/if_arp.h>
  31 #include <linux/icmpv6.h>
  32 #include <linux/netfilter.h>
  33 #include <linux/netfilter_ipv6.h>
  34 #include <linux/skbuff.h>
  35 #include <asm/uaccess.h>
  36 #include <asm/ioctls.h>
  37
  38 #include <net/net_namespace.h>
  39 #include <net/ip.h>
  40 #include <net/sock.h>
  41 #include <net/snmp.h>
  42
  43 #include <net/ipv6.h>
  44 #include <net/ndisc.h>
  45 #include <net/protocol.h>
  46 #include <net/ip6_route.h>
  47 #include <net/ip6_checksum.h>
  48 #include <net/addrconf.h>
  49 #include <net/transp_v6.h>
  50 #include <net/udp.h>
  51 #include <net/inet_common.h>
  52 #include <net/tcp_states.h>
  53 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
  54 #include <net/mip6.h>
  55 #endif
  56 #include <linux/mroute6.h>
  57
  58 #include <net/raw.h>
  59 #include <net/rawv6.h>
  60 #include <net/xfrm.h>
  61
  62 #include <linux/proc_fs.h>
  63 #include <linux/seq_file.h>
  64
  65 static struct raw_hashinfo raw_v6_hashinfo = {
  66         .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
  67 };
  68
  69 static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
  70                 unsigned short num, struct in6_addr *loc_addr,
  71                 struct in6_addr *rmt_addr, int dif)
  72 {
  73         struct hlist_node *node;
  74         int is_multicast = ipv6_addr_is_multicast(loc_addr);
  75
  76         sk_for_each_from(sk, node)
  77                 if (inet_sk(sk)->num == num) {
  78                         struct ipv6_pinfo *np = inet6_sk(sk);
  79
  80                         if (!net_eq(sock_net(sk), net))
  81                                 continue;
  82
  83                         if (!ipv6_addr_any(&np->daddr) &&
  84                             !ipv6_addr_equal(&np->daddr, rmt_addr))
  85                                 continue;
  86
  87                         if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
  88                                 continue;
  89
  90                         if (!ipv6_addr_any(&np->rcv_saddr)) {
  91                                 if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
  92                                         goto found;
  93                                 if (is_multicast &&
  94                                     inet6_mc_check(sk, loc_addr, rmt_addr))
  95                                         goto found;
  96                                 continue;
  97                         }
  98                         goto found;
  99                 }
 100         sk = NULL;
 101 found:
 102         return sk;
 103 }
 104
 105 /*
 106  *      0 - deliver
 107  *      1 - block
 108  */
 109 static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
 110 {
 111         struct icmp6hdr *icmph;
 112         struct raw6_sock *rp = raw6_sk(sk);
 113
 114         if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) {
 115                 __u32 *data = &rp->filter.data[0];
 116                 int bit_nr;
 117
 118                 icmph = (struct icmp6hdr *) skb->data;
 119                 bit_nr = icmph->icmp6_type;
 120
 121                 return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0;
 122         }
 123         return 0;
 124 }
 125
 126 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 127 static int (*mh_filter)(struct sock *sock, struct sk_buff *skb);
 128
 129 int rawv6_mh_filter_register(int (*filter)(struct sock *sock,
 130                                            struct sk_buff *skb))
 131 {
 132         rcu_assign_pointer(mh_filter, filter);
 133         return 0;
 134 }
 135 EXPORT_SYMBOL(rawv6_mh_filter_register);
 136
 137 int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock,
 138                                              struct sk_buff *skb))
 139 {
 140         rcu_assign_pointer(mh_filter, NULL);
 141         synchronize_rcu();
 142         return 0;
 143 }
 144 EXPORT_SYMBOL(rawv6_mh_filter_unregister);
 145
 146 #endif
 147
 148 /*
 149  *      demultiplex raw sockets.
 150  *      (should consider queueing the skb in the sock receive_queue
 151  *      without calling rawv6.c)
 152  *
 153  *      Caller owns SKB so we must make clones.
 154  */
 155 static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
 156 {
 157         struct in6_addr *saddr;
 158         struct in6_addr *daddr;
 159         struct sock *sk;
 160         int delivered = 0;
 161         __u8 hash;
 162         struct net *net;
 163
 164         saddr = &ipv6_hdr(skb)->saddr;
 165         daddr = saddr + 1;
 166
 167         hash = nexthdr & (MAX_INET_PROTOS - 1);
 168
 169         read_lock(&raw_v6_hashinfo.lock);
 170         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 171
 172         if (sk == NULL)
 173                 goto out;
 174
 175         net = dev_net(skb->dev);
 176         sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
 177
 178         while (sk) {
 179                 int filtered;
 180
 181                 delivered = 1;
 182                 switch (nexthdr) {
 183                 case IPPROTO_ICMPV6:
 184                         filtered = icmpv6_filter(sk, skb);
 185                         break;
 186
 187 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 188                 case IPPROTO_MH:
 189                 {
 190                         /* XXX: To validate MH only once for each packet,
 191                          * this is placed here. It should be after checking
 192                          * xfrm policy, however it doesn't. The checking xfrm
 193                          * policy is placed in rawv6_rcv() because it is
 194                          * required for each socket.
 195                          */
 196                         int (*filter)(struct sock *sock, struct sk_buff *skb);
 197
 198                         filter = rcu_dereference(mh_filter);
 199                         filtered = filter ? filter(sk, skb) : 0;
 200                         break;
 201                 }
 202 #endif
 203                 default:
 204                         filtered = 0;
 205                         break;
 206                 }
 207
 208                 if (filtered < 0)
 209                         break;
 210                 if (filtered == 0) {
 211                         struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
 212
 213                         /* Not releasing hash table! */
 214                         if (clone) {
 215                                 nf_reset(clone);
 216                                 rawv6_rcv(sk, clone);
 217                         }
 218                 }
 219                 sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
 220                                      IP6CB(skb)->iif);
 221         }
 222 out:
 223         read_unlock(&raw_v6_hashinfo.lock);
 224         return delivered;
 225 }
 226
 227 int raw6_local_deliver(struct sk_buff *skb, int nexthdr)
 228 {
 229         struct sock *raw_sk;
 230
 231         raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]);
 232         if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
 233                 raw_sk = NULL;
 234
 235         return raw_sk != NULL;
 236 }
 237
 238 /* This cleans up af_inet6 a bit. -DaveM */
 239 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 240 {
 241         struct inet_sock *inet = inet_sk(sk);
 242         struct ipv6_pinfo *np = inet6_sk(sk);
 243         struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
 244         __be32 v4addr = 0;
 245         int addr_type;
 246         int err;
 247
 248         if (addr_len < SIN6_LEN_RFC2133)
 249                 return -EINVAL;
 250         addr_type = ipv6_addr_type(&addr->sin6_addr);
 251
 252         /* Raw sockets are IPv6 only */
 253         if (addr_type == IPV6_ADDR_MAPPED)
 254                 return(-EADDRNOTAVAIL);
 255
 256         lock_sock(sk);
 257
 258         err = -EINVAL;
 259         if (sk->sk_state != TCP_CLOSE)
 260                 goto out;
 261
 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;
 278
 279                         dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if);
 280                         if (!dev) {
 281                                 err = -ENODEV;
 282                                 goto out;
 283                         }
 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                                 if (dev)
 295                                         dev_put(dev);
 296                                 goto out;
 297                         }
 298                 }
 299                 if (dev)
 300                         dev_put(dev);
 301         }
 302
 303         inet->rcv_saddr = inet->saddr = v4addr;
 304         ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
 305         if (!(addr_type & IPV6_ADDR_MULTICAST))
 306                 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
 307         err = 0;
 308 out:
 309         release_sock(sk);
 310         return err;
 311 }
 312
 313 static void rawv6_err(struct sock *sk, struct sk_buff *skb,
 314                struct inet6_skb_parm *opt,
 315                int type, int code, int offset, __be32 info)
 316 {
 317         struct inet_sock *inet = inet_sk(sk);
 318         struct ipv6_pinfo *np = inet6_sk(sk);
 319         int err;
 320         int harderr;
 321
 322         /* Report error on raw socket, if:
 323            1. User requested recverr.
 324            2. Socket is connected (otherwise the error indication
 325               is useless without recverr and error is hard.
 326          */
 327         if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
 328                 return;
 329
 330         harderr = icmpv6_err_convert(type, code, &err);
 331         if (type == ICMPV6_PKT_TOOBIG)
 332                 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
 333
 334         if (np->recverr) {
 335                 u8 *payload = skb->data;
 336                 if (!inet->hdrincl)
 337                         payload += offset;
 338                 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
 339         }
 340
 341         if (np->recverr || harderr) {
 342                 sk->sk_err = err;
 343                 sk->sk_error_report(sk);
 344         }
 345 }
 346
 347 void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
 348                 int type, int code, int inner_offset, __be32 info)
 349 {
 350         struct sock *sk;
 351         int hash;
 352         struct in6_addr *saddr, *daddr;
 353         struct net *net;
 354
 355         hash = nexthdr & (RAW_HTABLE_SIZE - 1);
 356
 357         read_lock(&raw_v6_hashinfo.lock);
 358         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 359         if (sk != NULL) {
 360                 /* Note: ipv6_hdr(skb) != skb->data */
 361                 struct ipv6hdr *ip6h = (struct ipv6hdr *)skb->data;
 362                 saddr = &ip6h->saddr;
 363                 daddr = &ip6h->daddr;
 364                 net = dev_net(skb->dev);
 365
 366                 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
 367                                                 IP6CB(skb)->iif))) {
 368                         rawv6_err(sk, skb, NULL, type, code,
 369                                         inner_offset, info);
 370                         sk = sk_next(sk);
 371                 }
 372         }
 373         read_unlock(&raw_v6_hashinfo.lock);
 374 }
 375
 376 static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
 377 {
 378         if ((raw6_sk(sk)->checksum || sk->sk_filter) &&
 379             skb_checksum_complete(skb)) {
 380                 atomic_inc(&sk->sk_drops);
 381                 kfree_skb(skb);
 382                 return 0;
 383         }
 384
 385         /* Charge it to the socket. */
 386         if (sock_queue_rcv_skb(sk,skb)<0) {
 387                 atomic_inc(&sk->sk_drops);
 388                 kfree_skb(skb);
 389                 return 0;
 390         }
 391
 392         return 0;
 393 }
 394
 395 /*
 396  *      This is next to useless...
 397  *      if we demultiplex in network layer we don't need the extra call
 398  *      just to queue the skb...
 399  *      maybe we could have the network decide upon a hint if it
 400  *      should call raw_rcv for demultiplexing
 401  */
 402 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
 403 {
 404         struct inet_sock *inet = inet_sk(sk);
 405         struct raw6_sock *rp = raw6_sk(sk);
 406
 407         if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
 408                 atomic_inc(&sk->sk_drops);
 409                 kfree_skb(skb);
 410                 return NET_RX_DROP;
 411         }
 412
 413         if (!rp->checksum)
 414                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 415
 416         if (skb->ip_summed == CHECKSUM_COMPLETE) {
 417                 skb_postpull_rcsum(skb, skb_network_header(skb),
 418                                    skb_network_header_len(skb));
 419                 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 420                                      &ipv6_hdr(skb)->daddr,
 421                                      skb->len, inet->num, skb->csum))
 422                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 423         }
 424         if (!skb_csum_unnecessary(skb))
 425                 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 426                                                          &ipv6_hdr(skb)->daddr,
 427                                                          skb->len,
 428                                                          inet->num, 0));
 429
 430         if (inet->hdrincl) {
 431                 if (skb_checksum_complete(skb)) {
 432                         atomic_inc(&sk->sk_drops);
 433                         kfree_skb(skb);
 434                         return 0;
 435                 }
 436         }
 437
 438         rawv6_rcv_skb(sk, skb);
 439         return 0;
 440 }
 441
 442
 443 /*
 444  *      This should be easy, if there is something there
 445  *      we return it, otherwise we block.
 446  */
 447
 448 static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
 449                   struct msghdr *msg, size_t len,
 450                   int noblock, int flags, int *addr_len)
 451 {
 452         struct ipv6_pinfo *np = inet6_sk(sk);
 453         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
 454         struct sk_buff *skb;
 455         size_t copied;
 456         int err;
 457
 458         if (flags & MSG_OOB)
 459                 return -EOPNOTSUPP;
 460
 461         if (addr_len)
 462                 *addr_len=sizeof(*sin6);
 463
 464         if (flags & MSG_ERRQUEUE)
 465                 return ipv6_recv_error(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_timestamp(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         atomic_inc(&sk->sk_drops);
 524         goto out;
 525 }
 526
 527 static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
 528                                      struct raw6_sock *rp)
 529 {
 530         struct sk_buff *skb;
 531         int err = 0;
 532         int offset;
 533         int len;
 534         int total_len;
 535         __wsum tmp_csum;
 536         __sum16 csum;
 537
 538         if (!rp->checksum)
 539                 goto send;
 540
 541         if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
 542                 goto out;
 543
 544         offset = rp->offset;
 545         total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) -
 546                                                 skb->data);
 547         if (offset >= total_len - 1) {
 548                 err = -EINVAL;
 549                 ip6_flush_pending_frames(sk);
 550                 goto out;
 551         }
 552
 553         /* should be check HW csum miyazawa */
 554         if (skb_queue_len(&sk->sk_write_queue) == 1) {
 555                 /*
 556                  * Only one fragment on the socket.
 557                  */
 558                 tmp_csum = skb->csum;
 559         } else {
 560                 struct sk_buff *csum_skb = NULL;
 561                 tmp_csum = 0;
 562
 563                 skb_queue_walk(&sk->sk_write_queue, skb) {
 564                         tmp_csum = csum_add(tmp_csum, skb->csum);
 565
 566                         if (csum_skb)
 567                                 continue;
 568
 569                         len = skb->len - skb_transport_offset(skb);
 570                         if (offset >= len) {
 571                                 offset -= len;
 572                                 continue;
 573                         }
 574
 575                         csum_skb = skb;
 576                 }
 577
 578                 skb = csum_skb;
 579         }
 580
 581         offset += skb_transport_offset(skb);
 582         if (skb_copy_bits(skb, offset, &csum, 2))
 583                 BUG();
 584
 585         /* in case cksum was not initialized */
 586         if (unlikely(csum))
 587                 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
 588
 589         csum = csum_ipv6_magic(&fl->fl6_src,
 590                                    &fl->fl6_dst,
 591                                    total_len, fl->proto, tmp_csum);
 592
 593         if (csum == 0 && fl->proto == IPPROTO_UDP)
 594                 csum = CSUM_MANGLED_0;
 595
 596         if (skb_store_bits(skb, offset, &csum, 2))
 597                 BUG();
 598
 599 send:
 600         err = ip6_push_pending_frames(sk);
 601 out:
 602         return err;
 603 }
 604
 605 static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
 606                         struct flowi *fl, struct rt6_info *rt,
 607                         unsigned int flags)
 608 {
 609         struct ipv6_pinfo *np = inet6_sk(sk);
 610         struct ipv6hdr *iph;
 611         struct sk_buff *skb;
 612         int err;
 613
 614         if (length > rt->u.dst.dev->mtu) {
 615                 ipv6_local_error(sk, EMSGSIZE, fl, rt->u.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->u.dst.dev) + 15,
 623                                   flags & MSG_DONTWAIT, &err);
 624         if (skb == NULL)
 625                 goto error;
 626         skb_reserve(skb, LL_RESERVED_SPACE(rt->u.dst.dev));
 627
 628         skb->priority = sk->sk_priority;
 629         skb->mark = sk->sk_mark;
 630         skb->dst = dst_clone(&rt->u.dst);
 631
 632         skb_put(skb, length);
 633         skb_reset_network_header(skb);
 634         iph = ipv6_hdr(skb);
 635
 636         skb->ip_summed = CHECKSUM_NONE;
 637
 638         skb->transport_header = skb->network_header;
 639         err = memcpy_fromiovecend((void *)iph, from, 0, length);
 640         if (err)
 641                 goto error_fault;
 642
 643         IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS);
 644         err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
 645                       dst_output);
 646         if (err > 0)
 647                 err = np->recverr ? net_xmit_errno(err) : 0;
 648         if (err)
 649                 goto error;
 650 out:
 651         return 0;
 652
 653 error_fault:
 654         err = -EFAULT;
 655         kfree_skb(skb);
 656 error:
 657         IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
 658         return err;
 659 }
 660
 661 static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
 662 {
 663         struct iovec *iov;
 664         u8 __user *type = NULL;
 665         u8 __user *code = NULL;
 666         u8 len = 0;
 667         int probed = 0;
 668         int i;
 669
 670         if (!msg->msg_iov)
 671                 return 0;
 672
 673         for (i = 0; i < msg->msg_iovlen; i++) {
 674                 iov = &msg->msg_iov[i];
 675                 if (!iov)
 676                         continue;
 677
 678                 switch (fl->proto) {
 679                 case IPPROTO_ICMPV6:
 680                         /* check if one-byte field is readable or not. */
 681                         if (iov->iov_base && iov->iov_len < 1)
 682                                 break;
 683
 684                         if (!type) {
 685                                 type = iov->iov_base;
 686                                 /* check if code field is readable or not. */
 687                                 if (iov->iov_len > 1)
 688                                         code = type + 1;
 689                         } else if (!code)
 690                                 code = iov->iov_base;
 691
 692                         if (type && code) {
 693                                 if (get_user(fl->fl_icmp_type, type) ||
 694                                     get_user(fl->fl_icmp_code, code))
 695                                         return -EFAULT;
 696                                 probed = 1;
 697                         }
 698                         break;
 699                 case IPPROTO_MH:
 700                         if (iov->iov_base && iov->iov_len < 1)
 701                                 break;
 702                         /* check if type field is readable or not. */
 703                         if (iov->iov_len > 2 - len) {
 704                                 u8 __user *p = iov->iov_base;
 705                                 if (get_user(fl->fl_mh_type, &p[2 - len]))
 706                                         return -EFAULT;
 707                                 probed = 1;
 708                         } else
 709                                 len += iov->iov_len;
 710
 711                         break;
 712                 default:
 713                         probed = 1;
 714                         break;
 715                 }
 716                 if (probed)
 717                         break;
 718         }
 719         return 0;
 720 }
 721
 722 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
 723                    struct msghdr *msg, size_t len)
 724 {
 725         struct ipv6_txoptions opt_space;
 726         struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
 727         struct in6_addr *daddr, *final_p = NULL, final;
 728         struct inet_sock *inet = inet_sk(sk);
 729         struct ipv6_pinfo *np = inet6_sk(sk);
 730         struct raw6_sock *rp = raw6_sk(sk);
 731         struct ipv6_txoptions *opt = NULL;
 732         struct ip6_flowlabel *flowlabel = NULL;
 733         struct dst_entry *dst = NULL;
 734         struct flowi fl;
 735         int addr_len = msg->msg_namelen;
 736         int hlimit = -1;
 737         int tclass = -1;
 738         u16 proto;
 739         int err;
 740
 741         /* Rough check on arithmetic overflow,
 742            better check is made in ip6_append_data().
 743          */
 744         if (len > INT_MAX)
 745                 return -EMSGSIZE;
 746
 747         /* Mirror BSD error message compatibility */
 748         if (msg->msg_flags & MSG_OOB)
 749                 return -EOPNOTSUPP;
 750
 751         /*
 752          *      Get and verify the address.
 753          */
 754         memset(&fl, 0, sizeof(fl));
 755
 756         fl.mark = sk->sk_mark;
 757
 758         if (sin6) {
 759                 if (addr_len < SIN6_LEN_RFC2133)
 760                         return -EINVAL;
 761
 762                 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
 763                         return(-EAFNOSUPPORT);
 764
 765                 /* port is the proto value [0..255] carried in nexthdr */
 766                 proto = ntohs(sin6->sin6_port);
 767
 768                 if (!proto)
 769                         proto = inet->num;
 770                 else if (proto != inet->num)
 771                         return(-EINVAL);
 772
 773                 if (proto > 255)
 774                         return(-EINVAL);
 775
 776                 daddr = &sin6->sin6_addr;
 777                 if (np->sndflow) {
 778                         fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
 779                         if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
 780                                 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
 781                                 if (flowlabel == NULL)
 782                                         return -EINVAL;
 783                                 daddr = &flowlabel->dst;
 784                         }
 785                 }
 786
 787                 /*
 788                  * Otherwise it will be difficult to maintain
 789                  * sk->sk_dst_cache.
 790                  */
 791                 if (sk->sk_state == TCP_ESTABLISHED &&
 792                     ipv6_addr_equal(daddr, &np->daddr))
 793                         daddr = &np->daddr;
 794
 795                 if (addr_len >= sizeof(struct sockaddr_in6) &&
 796                     sin6->sin6_scope_id &&
 797                     ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
 798                         fl.oif = sin6->sin6_scope_id;
 799         } else {
 800                 if (sk->sk_state != TCP_ESTABLISHED)
 801                         return -EDESTADDRREQ;
 802
 803                 proto = inet->num;
 804                 daddr = &np->daddr;
 805                 fl.fl6_flowlabel = np->flow_label;
 806         }
 807
 808         if (fl.oif == 0)
 809                 fl.oif = sk->sk_bound_dev_if;
 810
 811         if (msg->msg_controllen) {
 812                 opt = &opt_space;
 813                 memset(opt, 0, sizeof(struct ipv6_txoptions));
 814                 opt->tot_len = sizeof(struct ipv6_txoptions);
 815
 816                 err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass);
 817                 if (err < 0) {
 818                         fl6_sock_release(flowlabel);
 819                         return err;
 820                 }
 821                 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
 822                         flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
 823                         if (flowlabel == NULL)
 824                                 return -EINVAL;
 825                 }
 826                 if (!(opt->opt_nflen|opt->opt_flen))
 827                         opt = NULL;
 828         }
 829         if (opt == NULL)
 830                 opt = np->opt;
 831         if (flowlabel)
 832                 opt = fl6_merge_options(&opt_space, flowlabel, opt);
 833         opt = ipv6_fixup_options(&opt_space, opt);
 834
 835         fl.proto = proto;
 836         err = rawv6_probe_proto_opt(&fl, msg);
 837         if (err)
 838                 goto out;
 839
 840         if (!ipv6_addr_any(daddr))
 841                 ipv6_addr_copy(&fl.fl6_dst, daddr);
 842         else
 843                 fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
 844         if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
 845                 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
 846
 847         /* merge ip6_build_xmit from ip6_output */
 848         if (opt && opt->srcrt) {
 849                 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
 850                 ipv6_addr_copy(&final, &fl.fl6_dst);
 851                 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
 852                 final_p = &final;
 853         }
 854
 855         if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
 856                 fl.oif = np->mcast_oif;
 857         security_sk_classify_flow(sk, &fl);
 858
 859         err = ip6_dst_lookup(sk, &dst, &fl);
 860         if (err)
 861                 goto out;
 862         if (final_p)
 863                 ipv6_addr_copy(&fl.fl6_dst, final_p);
 864
 865         if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 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                 if (tclass < 0)
 884                         tclass = 0;
 885         }
 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, (struct rt6_info*)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);
 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, 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)->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, int optlen)
1006 {
1007         switch(level) {
1008                 case SOL_RAW:
1009                         break;
1010
1011                 case SOL_ICMPV6:
1012                         if (inet_sk(sk)->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, int optlen)
1030 {
1031         switch (level) {
1032         case SOL_RAW:
1033                 break;
1034         case SOL_ICMPV6:
1035                 if (inet_sk(sk)->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)->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)->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 = atomic_read(&sk->sk_wmem_alloc);
1135                         return put_user(amount, (int __user *)arg);
1136                 }
1137                 case SIOCINQ:
1138                 {
1139                         struct sk_buff *skb;
1140                         int amount = 0;
1141
1142                         spin_lock_bh(&sk->sk_receive_queue.lock);
1143                         skb = skb_peek(&sk->sk_receive_queue);
1144                         if (skb != NULL)
1145                                 amount = skb->tail - skb->transport_header;
1146                         spin_unlock_bh(&sk->sk_receive_queue.lock);
1147                         return put_user(amount, (int __user *)arg);
1148                 }
1149
1150                 default:
1151 #ifdef CONFIG_IPV6_MROUTE
1152                         return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1153 #else
1154                         return -ENOIOCTLCMD;
1155 #endif
1156         }
1157 }
1158
1159 static void rawv6_close(struct sock *sk, long timeout)
1160 {
1161         if (inet_sk(sk)->num == IPPROTO_RAW)
1162                 ip6_ra_control(sk, -1, NULL);
1163         ip6mr_sk_done(sk);
1164         sk_common_release(sk);
1165 }
1166
1167 static int raw6_destroy(struct sock *sk)
1168 {
1169         lock_sock(sk);
1170         ip6_flush_pending_frames(sk);
1171         release_sock(sk);
1172
1173         return inet6_destroy_sock(sk);
1174 }
1175
1176 static int rawv6_init_sk(struct sock *sk)
1177 {
1178         struct raw6_sock *rp = raw6_sk(sk);
1179
1180         switch (inet_sk(sk)->num) {
1181         case IPPROTO_ICMPV6:
1182                 rp->checksum = 1;
1183                 rp->offset   = 2;
1184                 break;
1185         case IPPROTO_MH:
1186                 rp->checksum = 1;
1187                 rp->offset   = 4;
1188                 break;
1189         default:
1190                 break;
1191         }
1192         return(0);
1193 }
1194
1195 struct proto rawv6_prot = {
1196         .name              = "RAWv6",
1197         .owner             = THIS_MODULE,
1198         .close             = rawv6_close,
1199         .destroy           = raw6_destroy,
1200         .connect           = ip6_datagram_connect,
1201         .disconnect        = udp_disconnect,
1202         .ioctl             = rawv6_ioctl,
1203         .init              = rawv6_init_sk,
1204         .setsockopt        = rawv6_setsockopt,
1205         .getsockopt        = rawv6_getsockopt,
1206         .sendmsg           = rawv6_sendmsg,
1207         .recvmsg           = rawv6_recvmsg,
1208         .bind              = rawv6_bind,
1209         .backlog_rcv       = rawv6_rcv_skb,
1210         .hash              = raw_hash_sk,
1211         .unhash            = raw_unhash_sk,
1212         .obj_size          = sizeof(struct raw6_sock),
1213         .h.raw_hash        = &raw_v6_hashinfo,
1214 #ifdef CONFIG_COMPAT
1215         .compat_setsockopt = compat_rawv6_setsockopt,
1216         .compat_getsockopt = compat_rawv6_getsockopt,
1217 #endif
1218 };
1219
1220 #ifdef CONFIG_PROC_FS
1221 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1222 {
1223         struct ipv6_pinfo *np = inet6_sk(sp);
1224         struct in6_addr *dest, *src;
1225         __u16 destp, srcp;
1226
1227         dest  = &np->daddr;
1228         src   = &np->rcv_saddr;
1229         destp = 0;
1230         srcp  = inet_sk(sp)->num;
1231         seq_printf(seq,
1232                    "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1233                    "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
1234                    i,
1235                    src->s6_addr32[0], src->s6_addr32[1],
1236                    src->s6_addr32[2], src->s6_addr32[3], srcp,
1237                    dest->s6_addr32[0], dest->s6_addr32[1],
1238                    dest->s6_addr32[2], dest->s6_addr32[3], destp,
1239                    sp->sk_state,
1240                    atomic_read(&sp->sk_wmem_alloc),
1241                    atomic_read(&sp->sk_rmem_alloc),
1242                    0, 0L, 0,
1243                    sock_i_uid(sp), 0,
1244                    sock_i_ino(sp),
1245                    atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1246 }
1247
1248 static int raw6_seq_show(struct seq_file *seq, void *v)
1249 {
1250         if (v == SEQ_START_TOKEN)
1251                 seq_printf(seq,
1252                            "  sl  "
1253                            "local_address                         "
1254                            "remote_address                        "
1255                            "st tx_queue rx_queue tr tm->when retrnsmt"
1256                            "   uid  timeout inode  drops\n");
1257         else
1258                 raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1259         return 0;
1260 }
1261
1262 static const struct seq_operations raw6_seq_ops = {
1263         .start =        raw_seq_start,
1264         .next =         raw_seq_next,
1265         .stop =         raw_seq_stop,
1266         .show =         raw6_seq_show,
1267 };
1268
1269 static int raw6_seq_open(struct inode *inode, struct file *file)
1270 {
1271         return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1272 }
1273
1274 static const struct file_operations raw6_seq_fops = {
1275         .owner =        THIS_MODULE,
1276         .open =         raw6_seq_open,
1277         .read =         seq_read,
1278         .llseek =       seq_lseek,
1279         .release =      seq_release_net,
1280 };
1281
1282 static int raw6_init_net(struct net *net)
1283 {
1284         if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops))
1285                 return -ENOMEM;
1286
1287         return 0;
1288 }
1289
1290 static void raw6_exit_net(struct net *net)
1291 {
1292         proc_net_remove(net, "raw6");
1293 }
1294
1295 static struct pernet_operations raw6_net_ops = {
1296         .init = raw6_init_net,
1297         .exit = raw6_exit_net,
1298 };
1299
1300 int __init raw6_proc_init(void)
1301 {
1302         return register_pernet_subsys(&raw6_net_ops);
1303 }
1304
1305 void raw6_proc_exit(void)
1306 {
1307         unregister_pernet_subsys(&raw6_net_ops);
1308 }
1309 #endif  /* CONFIG_PROC_FS */
1310
1311 /* Same as inet6_dgram_ops, sans udp_poll.  */
1312 static const struct proto_ops inet6_sockraw_ops = {
1313         .family            = PF_INET6,
1314         .owner             = THIS_MODULE,
1315         .release           = inet6_release,
1316         .bind              = inet6_bind,
1317         .connect           = inet_dgram_connect,        /* ok           */
1318         .socketpair        = sock_no_socketpair,        /* a do nothing */
1319         .accept            = sock_no_accept,            /* a do nothing */
1320         .getname           = inet6_getname,
1321         .poll              = datagram_poll,             /* ok           */
1322         .ioctl             = inet6_ioctl,               /* must change  */
1323         .listen            = sock_no_listen,            /* ok           */
1324         .shutdown          = inet_shutdown,             /* ok           */
1325         .setsockopt        = sock_common_setsockopt,    /* ok           */
1326         .getsockopt        = sock_common_getsockopt,    /* ok           */
1327         .sendmsg           = inet_sendmsg,              /* ok           */
1328         .recvmsg           = sock_common_recvmsg,       /* ok           */
1329         .mmap              = sock_no_mmap,
1330         .sendpage          = sock_no_sendpage,
1331 #ifdef CONFIG_COMPAT
1332         .compat_setsockopt = compat_sock_common_setsockopt,
1333         .compat_getsockopt = compat_sock_common_getsockopt,
1334 #endif
1335 };
1336
1337 static struct inet_protosw rawv6_protosw = {
1338         .type           = SOCK_RAW,
1339         .protocol       = IPPROTO_IP,   /* wild card */
1340         .prot           = &rawv6_prot,
1341         .ops            = &inet6_sockraw_ops,
1342         .capability     = CAP_NET_RAW,
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 }