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         unsigned int hh_len;
 613         int err;
 614
 615         if (length > rt->u.dst.dev->mtu) {
 616                 ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
 617                 return -EMSGSIZE;
 618         }
 619         if (flags&MSG_PROBE)
 620                 goto out;
 621
 622         hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
 623
 624         skb = sock_alloc_send_skb(sk, length+hh_len+15,
 625                                   flags&MSG_DONTWAIT, &err);
 626         if (skb == NULL)
 627                 goto error;
 628         skb_reserve(skb, hh_len);
 629
 630         skb->priority = sk->sk_priority;
 631         skb->mark = sk->sk_mark;
 632         skb->dst = dst_clone(&rt->u.dst);
 633
 634         skb_put(skb, length);
 635         skb_reset_network_header(skb);
 636         iph = ipv6_hdr(skb);
 637
 638         skb->ip_summed = CHECKSUM_NONE;
 639
 640         skb->transport_header = skb->network_header;
 641         err = memcpy_fromiovecend((void *)iph, from, 0, length);
 642         if (err)
 643                 goto error_fault;
 644
 645         IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS);
 646         err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
 647                       dst_output);
 648         if (err > 0)
 649                 err = np->recverr ? net_xmit_errno(err) : 0;
 650         if (err)
 651                 goto error;
 652 out:
 653         return 0;
 654
 655 error_fault:
 656         err = -EFAULT;
 657         kfree_skb(skb);
 658 error:
 659         IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
 660         return err;
 661 }
 662
 663 static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
 664 {
 665         struct iovec *iov;
 666         u8 __user *type = NULL;
 667         u8 __user *code = NULL;
 668         u8 len = 0;
 669         int probed = 0;
 670         int i;
 671
 672         if (!msg->msg_iov)
 673                 return 0;
 674
 675         for (i = 0; i < msg->msg_iovlen; i++) {
 676                 iov = &msg->msg_iov[i];
 677                 if (!iov)
 678                         continue;
 679
 680                 switch (fl->proto) {
 681                 case IPPROTO_ICMPV6:
 682                         /* check if one-byte field is readable or not. */
 683                         if (iov->iov_base && iov->iov_len < 1)
 684                                 break;
 685
 686                         if (!type) {
 687                                 type = iov->iov_base;
 688                                 /* check if code field is readable or not. */
 689                                 if (iov->iov_len > 1)
 690                                         code = type + 1;
 691                         } else if (!code)
 692                                 code = iov->iov_base;
 693
 694                         if (type && code) {
 695                                 if (get_user(fl->fl_icmp_type, type) ||
 696                                     get_user(fl->fl_icmp_code, code))
 697                                         return -EFAULT;
 698                                 probed = 1;
 699                         }
 700                         break;
 701                 case IPPROTO_MH:
 702                         if (iov->iov_base && iov->iov_len < 1)
 703                                 break;
 704                         /* check if type field is readable or not. */
 705                         if (iov->iov_len > 2 - len) {
 706                                 u8 __user *p = iov->iov_base;
 707                                 if (get_user(fl->fl_mh_type, &p[2 - len]))
 708                                         return -EFAULT;
 709                                 probed = 1;
 710                         } else
 711                                 len += iov->iov_len;
 712
 713                         break;
 714                 default:
 715                         probed = 1;
 716                         break;
 717                 }
 718                 if (probed)
 719                         break;
 720         }
 721         return 0;
 722 }
 723
 724 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
 725                    struct msghdr *msg, size_t len)
 726 {
 727         struct ipv6_txoptions opt_space;
 728         struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
 729         struct in6_addr *daddr, *final_p = NULL, final;
 730         struct inet_sock *inet = inet_sk(sk);
 731         struct ipv6_pinfo *np = inet6_sk(sk);
 732         struct raw6_sock *rp = raw6_sk(sk);
 733         struct ipv6_txoptions *opt = NULL;
 734         struct ip6_flowlabel *flowlabel = NULL;
 735         struct dst_entry *dst = NULL;
 736         struct flowi fl;
 737         int addr_len = msg->msg_namelen;
 738         int hlimit = -1;
 739         int tclass = -1;
 740         u16 proto;
 741         int err;
 742
 743         /* Rough check on arithmetic overflow,
 744            better check is made in ip6_append_data().
 745          */
 746         if (len > INT_MAX)
 747                 return -EMSGSIZE;
 748
 749         /* Mirror BSD error message compatibility */
 750         if (msg->msg_flags & MSG_OOB)
 751                 return -EOPNOTSUPP;
 752
 753         /*
 754          *      Get and verify the address.
 755          */
 756         memset(&fl, 0, sizeof(fl));
 757
 758         fl.mark = sk->sk_mark;
 759
 760         if (sin6) {
 761                 if (addr_len < SIN6_LEN_RFC2133)
 762                         return -EINVAL;
 763
 764                 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
 765                         return(-EAFNOSUPPORT);
 766
 767                 /* port is the proto value [0..255] carried in nexthdr */
 768                 proto = ntohs(sin6->sin6_port);
 769
 770                 if (!proto)
 771                         proto = inet->num;
 772                 else if (proto != inet->num)
 773                         return(-EINVAL);
 774
 775                 if (proto > 255)
 776                         return(-EINVAL);
 777
 778                 daddr = &sin6->sin6_addr;
 779                 if (np->sndflow) {
 780                         fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
 781                         if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
 782                                 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
 783                                 if (flowlabel == NULL)
 784                                         return -EINVAL;
 785                                 daddr = &flowlabel->dst;
 786                         }
 787                 }
 788
 789                 /*
 790                  * Otherwise it will be difficult to maintain
 791                  * sk->sk_dst_cache.
 792                  */
 793                 if (sk->sk_state == TCP_ESTABLISHED &&
 794                     ipv6_addr_equal(daddr, &np->daddr))
 795                         daddr = &np->daddr;
 796
 797                 if (addr_len >= sizeof(struct sockaddr_in6) &&
 798                     sin6->sin6_scope_id &&
 799                     ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
 800                         fl.oif = sin6->sin6_scope_id;
 801         } else {
 802                 if (sk->sk_state != TCP_ESTABLISHED)
 803                         return -EDESTADDRREQ;
 804
 805                 proto = inet->num;
 806                 daddr = &np->daddr;
 807                 fl.fl6_flowlabel = np->flow_label;
 808         }
 809
 810         if (fl.oif == 0)
 811                 fl.oif = sk->sk_bound_dev_if;
 812
 813         if (msg->msg_controllen) {
 814                 opt = &opt_space;
 815                 memset(opt, 0, sizeof(struct ipv6_txoptions));
 816                 opt->tot_len = sizeof(struct ipv6_txoptions);
 817
 818                 err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
 819                 if (err < 0) {
 820                         fl6_sock_release(flowlabel);
 821                         return err;
 822                 }
 823                 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
 824                         flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
 825                         if (flowlabel == NULL)
 826                                 return -EINVAL;
 827                 }
 828                 if (!(opt->opt_nflen|opt->opt_flen))
 829                         opt = NULL;
 830         }
 831         if (opt == NULL)
 832                 opt = np->opt;
 833         if (flowlabel)
 834                 opt = fl6_merge_options(&opt_space, flowlabel, opt);
 835         opt = ipv6_fixup_options(&opt_space, opt);
 836
 837         fl.proto = proto;
 838         err = rawv6_probe_proto_opt(&fl, msg);
 839         if (err)
 840                 goto out;
 841
 842         if (!ipv6_addr_any(daddr))
 843                 ipv6_addr_copy(&fl.fl6_dst, daddr);
 844         else
 845                 fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
 846         if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
 847                 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
 848
 849         /* merge ip6_build_xmit from ip6_output */
 850         if (opt && opt->srcrt) {
 851                 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
 852                 ipv6_addr_copy(&final, &fl.fl6_dst);
 853                 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
 854                 final_p = &final;
 855         }
 856
 857         if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
 858                 fl.oif = np->mcast_oif;
 859         security_sk_classify_flow(sk, &fl);
 860
 861         err = ip6_dst_lookup(sk, &dst, &fl);
 862         if (err)
 863                 goto out;
 864         if (final_p)
 865                 ipv6_addr_copy(&fl.fl6_dst, final_p);
 866
 867         if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) {
 868                 if (err == -EREMOTE)
 869                         err = ip6_dst_blackhole(sk, &dst, &fl);
 870                 if (err < 0)
 871                         goto out;
 872         }
 873
 874         if (hlimit < 0) {
 875                 if (ipv6_addr_is_multicast(&fl.fl6_dst))
 876                         hlimit = np->mcast_hops;
 877                 else
 878                         hlimit = np->hop_limit;
 879                 if (hlimit < 0)
 880                         hlimit = ip6_dst_hoplimit(dst);
 881         }
 882
 883         if (tclass < 0) {
 884                 tclass = np->tclass;
 885                 if (tclass < 0)
 886                         tclass = 0;
 887         }
 888
 889         if (msg->msg_flags&MSG_CONFIRM)
 890                 goto do_confirm;
 891
 892 back_from_confirm:
 893         if (inet->hdrincl) {
 894                 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
 895         } else {
 896                 lock_sock(sk);
 897                 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
 898                         len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
 899                         msg->msg_flags);
 900
 901                 if (err)
 902                         ip6_flush_pending_frames(sk);
 903                 else if (!(msg->msg_flags & MSG_MORE))
 904                         err = rawv6_push_pending_frames(sk, &fl, rp);
 905                 release_sock(sk);
 906         }
 907 done:
 908         dst_release(dst);
 909 out:
 910         fl6_sock_release(flowlabel);
 911         return err<0?err:len;
 912 do_confirm:
 913         dst_confirm(dst);
 914         if (!(msg->msg_flags & MSG_PROBE) || len)
 915                 goto back_from_confirm;
 916         err = 0;
 917         goto done;
 918 }
 919
 920 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
 921                                char __user *optval, int optlen)
 922 {
 923         switch (optname) {
 924         case ICMPV6_FILTER:
 925                 if (optlen > sizeof(struct icmp6_filter))
 926                         optlen = sizeof(struct icmp6_filter);
 927                 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
 928                         return -EFAULT;
 929                 return 0;
 930         default:
 931                 return -ENOPROTOOPT;
 932         }
 933
 934         return 0;
 935 }
 936
 937 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
 938                                char __user *optval, int __user *optlen)
 939 {
 940         int len;
 941
 942         switch (optname) {
 943         case ICMPV6_FILTER:
 944                 if (get_user(len, optlen))
 945                         return -EFAULT;
 946                 if (len < 0)
 947                         return -EINVAL;
 948                 if (len > sizeof(struct icmp6_filter))
 949                         len = sizeof(struct icmp6_filter);
 950                 if (put_user(len, optlen))
 951                         return -EFAULT;
 952                 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
 953                         return -EFAULT;
 954                 return 0;
 955         default:
 956                 return -ENOPROTOOPT;
 957         }
 958
 959         return 0;
 960 }
 961
 962
 963 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
 964                             char __user *optval, int optlen)
 965 {
 966         struct raw6_sock *rp = raw6_sk(sk);
 967         int val;
 968
 969         if (get_user(val, (int __user *)optval))
 970                 return -EFAULT;
 971
 972         switch (optname) {
 973                 case IPV6_CHECKSUM:
 974                         if (inet_sk(sk)->num == IPPROTO_ICMPV6 &&
 975                             level == IPPROTO_IPV6) {
 976                                 /*
 977                                  * RFC3542 tells that IPV6_CHECKSUM socket
 978                                  * option in the IPPROTO_IPV6 level is not
 979                                  * allowed on ICMPv6 sockets.
 980                                  * If you want to set it, use IPPROTO_RAW
 981                                  * level IPV6_CHECKSUM socket option
 982                                  * (Linux extension).
 983                                  */
 984                                 return -EINVAL;
 985                         }
 986
 987                         /* You may get strange result with a positive odd offset;
 988                            RFC2292bis agrees with me. */
 989                         if (val > 0 && (val&1))
 990                                 return(-EINVAL);
 991                         if (val < 0) {
 992                                 rp->checksum = 0;
 993                         } else {
 994                                 rp->checksum = 1;
 995                                 rp->offset = val;
 996                         }
 997
 998                         return 0;
 999                         break;
1000
1001                 default:
1002                         return(-ENOPROTOOPT);
1003         }
1004 }
1005
1006 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1007                           char __user *optval, int optlen)
1008 {
1009         switch(level) {
1010                 case SOL_RAW:
1011                         break;
1012
1013                 case SOL_ICMPV6:
1014                         if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1015                                 return -EOPNOTSUPP;
1016                         return rawv6_seticmpfilter(sk, level, optname, optval,
1017                                                    optlen);
1018                 case SOL_IPV6:
1019                         if (optname == IPV6_CHECKSUM)
1020                                 break;
1021                 default:
1022                         return ipv6_setsockopt(sk, level, optname, optval,
1023                                                optlen);
1024         }
1025
1026         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1027 }
1028
1029 #ifdef CONFIG_COMPAT
1030 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1031                                    char __user *optval, int optlen)
1032 {
1033         switch (level) {
1034         case SOL_RAW:
1035                 break;
1036         case SOL_ICMPV6:
1037                 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1038                         return -EOPNOTSUPP;
1039                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1040         case SOL_IPV6:
1041                 if (optname == IPV6_CHECKSUM)
1042                         break;
1043         default:
1044                 return compat_ipv6_setsockopt(sk, level, optname,
1045                                               optval, optlen);
1046         }
1047         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1048 }
1049 #endif
1050
1051 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1052                             char __user *optval, int __user *optlen)
1053 {
1054         struct raw6_sock *rp = raw6_sk(sk);
1055         int val, len;
1056
1057         if (get_user(len,optlen))
1058                 return -EFAULT;
1059
1060         switch (optname) {
1061         case IPV6_CHECKSUM:
1062                 /*
1063                  * We allow getsockopt() for IPPROTO_IPV6-level
1064                  * IPV6_CHECKSUM socket option on ICMPv6 sockets
1065                  * since RFC3542 is silent about it.
1066                  */
1067                 if (rp->checksum == 0)
1068                         val = -1;
1069                 else
1070                         val = rp->offset;
1071                 break;
1072
1073         default:
1074                 return -ENOPROTOOPT;
1075         }
1076
1077         len = min_t(unsigned int, sizeof(int), len);
1078
1079         if (put_user(len, optlen))
1080                 return -EFAULT;
1081         if (copy_to_user(optval,&val,len))
1082                 return -EFAULT;
1083         return 0;
1084 }
1085
1086 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1087                           char __user *optval, int __user *optlen)
1088 {
1089         switch(level) {
1090                 case SOL_RAW:
1091                         break;
1092
1093                 case SOL_ICMPV6:
1094                         if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1095                                 return -EOPNOTSUPP;
1096                         return rawv6_geticmpfilter(sk, level, optname, optval,
1097                                                    optlen);
1098                 case SOL_IPV6:
1099                         if (optname == IPV6_CHECKSUM)
1100                                 break;
1101                 default:
1102                         return ipv6_getsockopt(sk, level, optname, optval,
1103                                                optlen);
1104         }
1105
1106         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1107 }
1108
1109 #ifdef CONFIG_COMPAT
1110 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1111                                    char __user *optval, int __user *optlen)
1112 {
1113         switch (level) {
1114         case SOL_RAW:
1115                 break;
1116         case SOL_ICMPV6:
1117                 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1118                         return -EOPNOTSUPP;
1119                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1120         case SOL_IPV6:
1121                 if (optname == IPV6_CHECKSUM)
1122                         break;
1123         default:
1124                 return compat_ipv6_getsockopt(sk, level, optname,
1125                                               optval, optlen);
1126         }
1127         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1128 }
1129 #endif
1130
1131 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1132 {
1133         switch(cmd) {
1134                 case SIOCOUTQ:
1135                 {
1136                         int amount = atomic_read(&sk->sk_wmem_alloc);
1137                         return put_user(amount, (int __user *)arg);
1138                 }
1139                 case SIOCINQ:
1140                 {
1141                         struct sk_buff *skb;
1142                         int amount = 0;
1143
1144                         spin_lock_bh(&sk->sk_receive_queue.lock);
1145                         skb = skb_peek(&sk->sk_receive_queue);
1146                         if (skb != NULL)
1147                                 amount = skb->tail - skb->transport_header;
1148                         spin_unlock_bh(&sk->sk_receive_queue.lock);
1149                         return put_user(amount, (int __user *)arg);
1150                 }
1151
1152                 default:
1153 #ifdef CONFIG_IPV6_MROUTE
1154                         return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1155 #else
1156                         return -ENOIOCTLCMD;
1157 #endif
1158         }
1159 }
1160
1161 static void rawv6_close(struct sock *sk, long timeout)
1162 {
1163         if (inet_sk(sk)->num == IPPROTO_RAW)
1164                 ip6_ra_control(sk, -1, NULL);
1165         ip6mr_sk_done(sk);
1166         sk_common_release(sk);
1167 }
1168
1169 static int rawv6_init_sk(struct sock *sk)
1170 {
1171         struct raw6_sock *rp = raw6_sk(sk);
1172
1173         switch (inet_sk(sk)->num) {
1174         case IPPROTO_ICMPV6:
1175                 rp->checksum = 1;
1176                 rp->offset   = 2;
1177                 break;
1178         case IPPROTO_MH:
1179                 rp->checksum = 1;
1180                 rp->offset   = 4;
1181                 break;
1182         default:
1183                 break;
1184         }
1185         return(0);
1186 }
1187
1188 struct proto rawv6_prot = {
1189         .name              = "RAWv6",
1190         .owner             = THIS_MODULE,
1191         .close             = rawv6_close,
1192         .connect           = ip6_datagram_connect,
1193         .disconnect        = udp_disconnect,
1194         .ioctl             = rawv6_ioctl,
1195         .init              = rawv6_init_sk,
1196         .destroy           = inet6_destroy_sock,
1197         .setsockopt        = rawv6_setsockopt,
1198         .getsockopt        = rawv6_getsockopt,
1199         .sendmsg           = rawv6_sendmsg,
1200         .recvmsg           = rawv6_recvmsg,
1201         .bind              = rawv6_bind,
1202         .backlog_rcv       = rawv6_rcv_skb,
1203         .hash              = raw_hash_sk,
1204         .unhash            = raw_unhash_sk,
1205         .obj_size          = sizeof(struct raw6_sock),
1206         .h.raw_hash        = &raw_v6_hashinfo,
1207 #ifdef CONFIG_COMPAT
1208         .compat_setsockopt = compat_rawv6_setsockopt,
1209         .compat_getsockopt = compat_rawv6_getsockopt,
1210 #endif
1211 };
1212
1213 #ifdef CONFIG_PROC_FS
1214 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1215 {
1216         struct ipv6_pinfo *np = inet6_sk(sp);
1217         struct in6_addr *dest, *src;
1218         __u16 destp, srcp;
1219
1220         dest  = &np->daddr;
1221         src   = &np->rcv_saddr;
1222         destp = 0;
1223         srcp  = inet_sk(sp)->num;
1224         seq_printf(seq,
1225                    "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1226                    "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
1227                    i,
1228                    src->s6_addr32[0], src->s6_addr32[1],
1229                    src->s6_addr32[2], src->s6_addr32[3], srcp,
1230                    dest->s6_addr32[0], dest->s6_addr32[1],
1231                    dest->s6_addr32[2], dest->s6_addr32[3], destp,
1232                    sp->sk_state,
1233                    atomic_read(&sp->sk_wmem_alloc),
1234                    atomic_read(&sp->sk_rmem_alloc),
1235                    0, 0L, 0,
1236                    sock_i_uid(sp), 0,
1237                    sock_i_ino(sp),
1238                    atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1239 }
1240
1241 static int raw6_seq_show(struct seq_file *seq, void *v)
1242 {
1243         if (v == SEQ_START_TOKEN)
1244                 seq_printf(seq,
1245                            "  sl  "
1246                            "local_address                         "
1247                            "remote_address                        "
1248                            "st tx_queue rx_queue tr tm->when retrnsmt"
1249                            "   uid  timeout inode  drops\n");
1250         else
1251                 raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1252         return 0;
1253 }
1254
1255 static const struct seq_operations raw6_seq_ops = {
1256         .start =        raw_seq_start,
1257         .next =         raw_seq_next,
1258         .stop =         raw_seq_stop,
1259         .show =         raw6_seq_show,
1260 };
1261
1262 static int raw6_seq_open(struct inode *inode, struct file *file)
1263 {
1264         return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1265 }
1266
1267 static const struct file_operations raw6_seq_fops = {
1268         .owner =        THIS_MODULE,
1269         .open =         raw6_seq_open,
1270         .read =         seq_read,
1271         .llseek =       seq_lseek,
1272         .release =      seq_release_net,
1273 };
1274
1275 static int raw6_init_net(struct net *net)
1276 {
1277         if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops))
1278                 return -ENOMEM;
1279
1280         return 0;
1281 }
1282
1283 static void raw6_exit_net(struct net *net)
1284 {
1285         proc_net_remove(net, "raw6");
1286 }
1287
1288 static struct pernet_operations raw6_net_ops = {
1289         .init = raw6_init_net,
1290         .exit = raw6_exit_net,
1291 };
1292
1293 int __init raw6_proc_init(void)
1294 {
1295         return register_pernet_subsys(&raw6_net_ops);
1296 }
1297
1298 void raw6_proc_exit(void)
1299 {
1300         unregister_pernet_subsys(&raw6_net_ops);
1301 }
1302 #endif  /* CONFIG_PROC_FS */
1303
1304 /* Same as inet6_dgram_ops, sans udp_poll.  */
1305 static const struct proto_ops inet6_sockraw_ops = {
1306         .family            = PF_INET6,
1307         .owner             = THIS_MODULE,
1308         .release           = inet6_release,
1309         .bind              = inet6_bind,
1310         .connect           = inet_dgram_connect,        /* ok           */
1311         .socketpair        = sock_no_socketpair,        /* a do nothing */
1312         .accept            = sock_no_accept,            /* a do nothing */
1313         .getname           = inet6_getname,
1314         .poll              = datagram_poll,             /* ok           */
1315         .ioctl             = inet6_ioctl,               /* must change  */
1316         .listen            = sock_no_listen,            /* ok           */
1317         .shutdown          = inet_shutdown,             /* ok           */
1318         .setsockopt        = sock_common_setsockopt,    /* ok           */
1319         .getsockopt        = sock_common_getsockopt,    /* ok           */
1320         .sendmsg           = inet_sendmsg,              /* ok           */
1321         .recvmsg           = sock_common_recvmsg,       /* ok           */
1322         .mmap              = sock_no_mmap,
1323         .sendpage          = sock_no_sendpage,
1324 #ifdef CONFIG_COMPAT
1325         .compat_setsockopt = compat_sock_common_setsockopt,
1326         .compat_getsockopt = compat_sock_common_getsockopt,
1327 #endif
1328 };
1329
1330 static struct inet_protosw rawv6_protosw = {
1331         .type           = SOCK_RAW,
1332         .protocol       = IPPROTO_IP,   /* wild card */
1333         .prot           = &rawv6_prot,
1334         .ops            = &inet6_sockraw_ops,
1335         .capability     = CAP_NET_RAW,
1336         .no_check       = UDP_CSUM_DEFAULT,
1337         .flags          = INET_PROTOSW_REUSE,
1338 };
1339
1340 int __init rawv6_init(void)
1341 {
1342         int ret;
1343
1344         ret = inet6_register_protosw(&rawv6_protosw);
1345         if (ret)
1346                 goto out;
1347 out:
1348         return ret;
1349 }
1350
1351 void rawv6_exit(void)
1352 {
1353         inet6_unregister_protosw(&rawv6_protosw);
1354 }