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   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
  57 #include <net/raw.h>
  58 #include <net/rawv6.h>
  59 #include <net/xfrm.h>
  60
  61 #include <linux/proc_fs.h>
  62 #include <linux/seq_file.h>
  63
  64 static struct raw_hashinfo raw_v6_hashinfo = {
  65         .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
  66 };
  67
  68 static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
  69                 unsigned short num, struct in6_addr *loc_addr,
  70                 struct in6_addr *rmt_addr, int dif)
  71 {
  72         struct hlist_node *node;
  73         int is_multicast = ipv6_addr_is_multicast(loc_addr);
  74
  75         sk_for_each_from(sk, node)
  76                 if (inet_sk(sk)->num == num) {
  77                         struct ipv6_pinfo *np = inet6_sk(sk);
  78
  79                         if (sk->sk_net != net)
  80                                 continue;
  81
  82                         if (!ipv6_addr_any(&np->daddr) &&
  83                             !ipv6_addr_equal(&np->daddr, rmt_addr))
  84                                 continue;
  85
  86                         if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
  87                                 continue;
  88
  89                         if (!ipv6_addr_any(&np->rcv_saddr)) {
  90                                 if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
  91                                         goto found;
  92                                 if (is_multicast &&
  93                                     inet6_mc_check(sk, loc_addr, rmt_addr))
  94                                         goto found;
  95                                 continue;
  96                         }
  97                         goto found;
  98                 }
  99         sk = NULL;
 100 found:
 101         return sk;
 102 }
 103
 104 /*
 105  *      0 - deliver
 106  *      1 - block
 107  */
 108 static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
 109 {
 110         struct icmp6hdr *icmph;
 111         struct raw6_sock *rp = raw6_sk(sk);
 112
 113         if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) {
 114                 __u32 *data = &rp->filter.data[0];
 115                 int bit_nr;
 116
 117                 icmph = (struct icmp6hdr *) skb->data;
 118                 bit_nr = icmph->icmp6_type;
 119
 120                 return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0;
 121         }
 122         return 0;
 123 }
 124
 125 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 126 static int (*mh_filter)(struct sock *sock, struct sk_buff *skb);
 127
 128 int rawv6_mh_filter_register(int (*filter)(struct sock *sock,
 129                                            struct sk_buff *skb))
 130 {
 131         rcu_assign_pointer(mh_filter, filter);
 132         return 0;
 133 }
 134 EXPORT_SYMBOL(rawv6_mh_filter_register);
 135
 136 int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock,
 137                                              struct sk_buff *skb))
 138 {
 139         rcu_assign_pointer(mh_filter, NULL);
 140         synchronize_rcu();
 141         return 0;
 142 }
 143 EXPORT_SYMBOL(rawv6_mh_filter_unregister);
 144
 145 #endif
 146
 147 /*
 148  *      demultiplex raw sockets.
 149  *      (should consider queueing the skb in the sock receive_queue
 150  *      without calling rawv6.c)
 151  *
 152  *      Caller owns SKB so we must make clones.
 153  */
 154 static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
 155 {
 156         struct in6_addr *saddr;
 157         struct in6_addr *daddr;
 158         struct sock *sk;
 159         int delivered = 0;
 160         __u8 hash;
 161         struct net *net;
 162
 163         saddr = &ipv6_hdr(skb)->saddr;
 164         daddr = saddr + 1;
 165
 166         hash = nexthdr & (MAX_INET_PROTOS - 1);
 167
 168         read_lock(&raw_v6_hashinfo.lock);
 169         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 170
 171         /*
 172          *      The first socket found will be delivered after
 173          *      delivery to transport protocols.
 174          */
 175
 176         if (sk == NULL)
 177                 goto out;
 178
 179         net = skb->dev->nd_net;
 180         sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
 181
 182         while (sk) {
 183                 int filtered;
 184
 185                 delivered = 1;
 186                 switch (nexthdr) {
 187                 case IPPROTO_ICMPV6:
 188                         filtered = icmpv6_filter(sk, skb);
 189                         break;
 190
 191 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 192                 case IPPROTO_MH:
 193                 {
 194                         /* XXX: To validate MH only once for each packet,
 195                          * this is placed here. It should be after checking
 196                          * xfrm policy, however it doesn't. The checking xfrm
 197                          * policy is placed in rawv6_rcv() because it is
 198                          * required for each socket.
 199                          */
 200                         int (*filter)(struct sock *sock, struct sk_buff *skb);
 201
 202                         filter = rcu_dereference(mh_filter);
 203                         filtered = filter ? filter(sk, skb) : 0;
 204                         break;
 205                 }
 206 #endif
 207                 default:
 208                         filtered = 0;
 209                         break;
 210                 }
 211
 212                 if (filtered < 0)
 213                         break;
 214                 if (filtered == 0) {
 215                         struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
 216
 217                         /* Not releasing hash table! */
 218                         if (clone) {
 219                                 nf_reset(clone);
 220                                 rawv6_rcv(sk, clone);
 221                         }
 222                 }
 223                 sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
 224                                      IP6CB(skb)->iif);
 225         }
 226 out:
 227         read_unlock(&raw_v6_hashinfo.lock);
 228         return delivered;
 229 }
 230
 231 int raw6_local_deliver(struct sk_buff *skb, int nexthdr)
 232 {
 233         struct sock *raw_sk;
 234
 235         raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]);
 236         if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
 237                 raw_sk = NULL;
 238
 239         return raw_sk != NULL;
 240 }
 241
 242 /* This cleans up af_inet6 a bit. -DaveM */
 243 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 244 {
 245         struct inet_sock *inet = inet_sk(sk);
 246         struct ipv6_pinfo *np = inet6_sk(sk);
 247         struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
 248         __be32 v4addr = 0;
 249         int addr_type;
 250         int err;
 251
 252         if (addr_len < SIN6_LEN_RFC2133)
 253                 return -EINVAL;
 254         addr_type = ipv6_addr_type(&addr->sin6_addr);
 255
 256         /* Raw sockets are IPv6 only */
 257         if (addr_type == IPV6_ADDR_MAPPED)
 258                 return(-EADDRNOTAVAIL);
 259
 260         lock_sock(sk);
 261
 262         err = -EINVAL;
 263         if (sk->sk_state != TCP_CLOSE)
 264                 goto out;
 265
 266         /* Check if the address belongs to the host. */
 267         if (addr_type != IPV6_ADDR_ANY) {
 268                 struct net_device *dev = NULL;
 269
 270                 if (addr_type & IPV6_ADDR_LINKLOCAL) {
 271                         if (addr_len >= sizeof(struct sockaddr_in6) &&
 272                             addr->sin6_scope_id) {
 273                                 /* Override any existing binding, if another
 274                                  * one is supplied by user.
 275                                  */
 276                                 sk->sk_bound_dev_if = addr->sin6_scope_id;
 277                         }
 278
 279                         /* Binding to link-local address requires an interface */
 280                         if (!sk->sk_bound_dev_if)
 281                                 goto out;
 282
 283                         dev = dev_get_by_index(sk->sk_net, sk->sk_bound_dev_if);
 284                         if (!dev) {
 285                                 err = -ENODEV;
 286                                 goto out;
 287                         }
 288                 }
 289
 290                 /* ipv4 addr of the socket is invalid.  Only the
 291                  * unspecified and mapped address have a v4 equivalent.
 292                  */
 293                 v4addr = LOOPBACK4_IPV6;
 294                 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
 295                         err = -EADDRNOTAVAIL;
 296                         if (!ipv6_chk_addr(sk->sk_net, &addr->sin6_addr,
 297                                            dev, 0)) {
 298                                 if (dev)
 299                                         dev_put(dev);
 300                                 goto out;
 301                         }
 302                 }
 303                 if (dev)
 304                         dev_put(dev);
 305         }
 306
 307         inet->rcv_saddr = inet->saddr = v4addr;
 308         ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
 309         if (!(addr_type & IPV6_ADDR_MULTICAST))
 310                 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
 311         err = 0;
 312 out:
 313         release_sock(sk);
 314         return err;
 315 }
 316
 317 static void rawv6_err(struct sock *sk, struct sk_buff *skb,
 318                struct inet6_skb_parm *opt,
 319                int type, int code, int offset, __be32 info)
 320 {
 321         struct inet_sock *inet = inet_sk(sk);
 322         struct ipv6_pinfo *np = inet6_sk(sk);
 323         int err;
 324         int harderr;
 325
 326         /* Report error on raw socket, if:
 327            1. User requested recverr.
 328            2. Socket is connected (otherwise the error indication
 329               is useless without recverr and error is hard.
 330          */
 331         if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
 332                 return;
 333
 334         harderr = icmpv6_err_convert(type, code, &err);
 335         if (type == ICMPV6_PKT_TOOBIG)
 336                 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
 337
 338         if (np->recverr) {
 339                 u8 *payload = skb->data;
 340                 if (!inet->hdrincl)
 341                         payload += offset;
 342                 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
 343         }
 344
 345         if (np->recverr || harderr) {
 346                 sk->sk_err = err;
 347                 sk->sk_error_report(sk);
 348         }
 349 }
 350
 351 void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
 352                 int type, int code, int inner_offset, __be32 info)
 353 {
 354         struct sock *sk;
 355         int hash;
 356         struct in6_addr *saddr, *daddr;
 357         struct net *net;
 358
 359         hash = nexthdr & (RAW_HTABLE_SIZE - 1);
 360
 361         read_lock(&raw_v6_hashinfo.lock);
 362         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 363         if (sk != NULL) {
 364                 saddr = &ipv6_hdr(skb)->saddr;
 365                 daddr = &ipv6_hdr(skb)->daddr;
 366                 net = skb->dev->nd_net;
 367
 368                 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
 369                                                 IP6CB(skb)->iif))) {
 370                         rawv6_err(sk, skb, NULL, type, code,
 371                                         inner_offset, info);
 372                         sk = sk_next(sk);
 373                 }
 374         }
 375         read_unlock(&raw_v6_hashinfo.lock);
 376 }
 377
 378 static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
 379 {
 380         if ((raw6_sk(sk)->checksum || sk->sk_filter) &&
 381             skb_checksum_complete(skb)) {
 382                 atomic_inc(&sk->sk_drops);
 383                 kfree_skb(skb);
 384                 return 0;
 385         }
 386
 387         /* Charge it to the socket. */
 388         if (sock_queue_rcv_skb(sk,skb)<0) {
 389                 atomic_inc(&sk->sk_drops);
 390                 kfree_skb(skb);
 391                 return 0;
 392         }
 393
 394         return 0;
 395 }
 396
 397 /*
 398  *      This is next to useless...
 399  *      if we demultiplex in network layer we don't need the extra call
 400  *      just to queue the skb...
 401  *      maybe we could have the network decide upon a hint if it
 402  *      should call raw_rcv for demultiplexing
 403  */
 404 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
 405 {
 406         struct inet_sock *inet = inet_sk(sk);
 407         struct raw6_sock *rp = raw6_sk(sk);
 408
 409         if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
 410                 atomic_inc(&sk->sk_drops);
 411                 kfree_skb(skb);
 412                 return NET_RX_DROP;
 413         }
 414
 415         if (!rp->checksum)
 416                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 417
 418         if (skb->ip_summed == CHECKSUM_COMPLETE) {
 419                 skb_postpull_rcsum(skb, skb_network_header(skb),
 420                                    skb_network_header_len(skb));
 421                 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 422                                      &ipv6_hdr(skb)->daddr,
 423                                      skb->len, inet->num, skb->csum))
 424                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 425         }
 426         if (!skb_csum_unnecessary(skb))
 427                 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 428                                                          &ipv6_hdr(skb)->daddr,
 429                                                          skb->len,
 430                                                          inet->num, 0));
 431
 432         if (inet->hdrincl) {
 433                 if (skb_checksum_complete(skb)) {
 434                         atomic_inc(&sk->sk_drops);
 435                         kfree_skb(skb);
 436                         return 0;
 437                 }
 438         }
 439
 440         rawv6_rcv_skb(sk, skb);
 441         return 0;
 442 }
 443
 444
 445 /*
 446  *      This should be easy, if there is something there
 447  *      we return it, otherwise we block.
 448  */
 449
 450 static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
 451                   struct msghdr *msg, size_t len,
 452                   int noblock, int flags, int *addr_len)
 453 {
 454         struct ipv6_pinfo *np = inet6_sk(sk);
 455         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
 456         struct sk_buff *skb;
 457         size_t copied;
 458         int err;
 459
 460         if (flags & MSG_OOB)
 461                 return -EOPNOTSUPP;
 462
 463         if (addr_len)
 464                 *addr_len=sizeof(*sin6);
 465
 466         if (flags & MSG_ERRQUEUE)
 467                 return ipv6_recv_error(sk, msg, len);
 468
 469         skb = skb_recv_datagram(sk, flags, noblock, &err);
 470         if (!skb)
 471                 goto out;
 472
 473         copied = skb->len;
 474         if (copied > len) {
 475                 copied = len;
 476                 msg->msg_flags |= MSG_TRUNC;
 477         }
 478
 479         if (skb_csum_unnecessary(skb)) {
 480                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 481         } else if (msg->msg_flags&MSG_TRUNC) {
 482                 if (__skb_checksum_complete(skb))
 483                         goto csum_copy_err;
 484                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 485         } else {
 486                 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
 487                 if (err == -EINVAL)
 488                         goto csum_copy_err;
 489         }
 490         if (err)
 491                 goto out_free;
 492
 493         /* Copy the address. */
 494         if (sin6) {
 495                 sin6->sin6_family = AF_INET6;
 496                 sin6->sin6_port = 0;
 497                 ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr);
 498                 sin6->sin6_flowinfo = 0;
 499                 sin6->sin6_scope_id = 0;
 500                 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
 501                         sin6->sin6_scope_id = IP6CB(skb)->iif;
 502         }
 503
 504         sock_recv_timestamp(msg, sk, skb);
 505
 506         if (np->rxopt.all)
 507                 datagram_recv_ctl(sk, msg, skb);
 508
 509         err = copied;
 510         if (flags & MSG_TRUNC)
 511                 err = skb->len;
 512
 513 out_free:
 514         skb_free_datagram(sk, skb);
 515 out:
 516         return err;
 517
 518 csum_copy_err:
 519         skb_kill_datagram(sk, skb, flags);
 520
 521         /* Error for blocking case is chosen to masquerade
 522            as some normal condition.
 523          */
 524         err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
 525         atomic_inc(&sk->sk_drops);
 526         goto out;
 527 }
 528
 529 static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
 530                                      struct raw6_sock *rp)
 531 {
 532         struct sk_buff *skb;
 533         int err = 0;
 534         int offset;
 535         int len;
 536         int total_len;
 537         __wsum tmp_csum;
 538         __sum16 csum;
 539
 540         if (!rp->checksum)
 541                 goto send;
 542
 543         if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
 544                 goto out;
 545
 546         offset = rp->offset;
 547         total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) -
 548                                                 skb->data);
 549         if (offset >= total_len - 1) {
 550                 err = -EINVAL;
 551                 ip6_flush_pending_frames(sk);
 552                 goto out;
 553         }
 554
 555         /* should be check HW csum miyazawa */
 556         if (skb_queue_len(&sk->sk_write_queue) == 1) {
 557                 /*
 558                  * Only one fragment on the socket.
 559                  */
 560                 tmp_csum = skb->csum;
 561         } else {
 562                 struct sk_buff *csum_skb = NULL;
 563                 tmp_csum = 0;
 564
 565                 skb_queue_walk(&sk->sk_write_queue, skb) {
 566                         tmp_csum = csum_add(tmp_csum, skb->csum);
 567
 568                         if (csum_skb)
 569                                 continue;
 570
 571                         len = skb->len - skb_transport_offset(skb);
 572                         if (offset >= len) {
 573                                 offset -= len;
 574                                 continue;
 575                         }
 576
 577                         csum_skb = skb;
 578                 }
 579
 580                 skb = csum_skb;
 581         }
 582
 583         offset += skb_transport_offset(skb);
 584         if (skb_copy_bits(skb, offset, &csum, 2))
 585                 BUG();
 586
 587         /* in case cksum was not initialized */
 588         if (unlikely(csum))
 589                 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
 590
 591         csum = csum_ipv6_magic(&fl->fl6_src,
 592                                    &fl->fl6_dst,
 593                                    total_len, fl->proto, tmp_csum);
 594
 595         if (csum == 0 && fl->proto == IPPROTO_UDP)
 596                 csum = CSUM_MANGLED_0;
 597
 598         if (skb_store_bits(skb, offset, &csum, 2))
 599                 BUG();
 600
 601 send:
 602         err = ip6_push_pending_frames(sk);
 603 out:
 604         return err;
 605 }
 606
 607 static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
 608                         struct flowi *fl, struct rt6_info *rt,
 609                         unsigned int flags)
 610 {
 611         struct ipv6_pinfo *np = inet6_sk(sk);
 612         struct ipv6hdr *iph;
 613         struct sk_buff *skb;
 614         unsigned int hh_len;
 615         int err;
 616
 617         if (length > rt->u.dst.dev->mtu) {
 618                 ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
 619                 return -EMSGSIZE;
 620         }
 621         if (flags&MSG_PROBE)
 622                 goto out;
 623
 624         hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
 625
 626         skb = sock_alloc_send_skb(sk, length+hh_len+15,
 627                                   flags&MSG_DONTWAIT, &err);
 628         if (skb == NULL)
 629                 goto error;
 630         skb_reserve(skb, hh_len);
 631
 632         skb->priority = sk->sk_priority;
 633         skb->mark = sk->sk_mark;
 634         skb->dst = dst_clone(&rt->u.dst);
 635
 636         skb_put(skb, length);
 637         skb_reset_network_header(skb);
 638         iph = ipv6_hdr(skb);
 639
 640         skb->ip_summed = CHECKSUM_NONE;
 641
 642         skb->transport_header = skb->network_header;
 643         err = memcpy_fromiovecend((void *)iph, from, 0, length);
 644         if (err)
 645                 goto error_fault;
 646
 647         IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS);
 648         err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
 649                       dst_output);
 650         if (err > 0)
 651                 err = np->recverr ? net_xmit_errno(err) : 0;
 652         if (err)
 653                 goto error;
 654 out:
 655         return 0;
 656
 657 error_fault:
 658         err = -EFAULT;
 659         kfree_skb(skb);
 660 error:
 661         IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
 662         return err;
 663 }
 664
 665 static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
 666 {
 667         struct iovec *iov;
 668         u8 __user *type = NULL;
 669         u8 __user *code = NULL;
 670         u8 len = 0;
 671         int probed = 0;
 672         int i;
 673
 674         if (!msg->msg_iov)
 675                 return 0;
 676
 677         for (i = 0; i < msg->msg_iovlen; i++) {
 678                 iov = &msg->msg_iov[i];
 679                 if (!iov)
 680                         continue;
 681
 682                 switch (fl->proto) {
 683                 case IPPROTO_ICMPV6:
 684                         /* check if one-byte field is readable or not. */
 685                         if (iov->iov_base && iov->iov_len < 1)
 686                                 break;
 687
 688                         if (!type) {
 689                                 type = iov->iov_base;
 690                                 /* check if code field is readable or not. */
 691                                 if (iov->iov_len > 1)
 692                                         code = type + 1;
 693                         } else if (!code)
 694                                 code = iov->iov_base;
 695
 696                         if (type && code) {
 697                                 if (get_user(fl->fl_icmp_type, type) ||
 698                                     get_user(fl->fl_icmp_code, code))
 699                                         return -EFAULT;
 700                                 probed = 1;
 701                         }
 702                         break;
 703                 case IPPROTO_MH:
 704                         if (iov->iov_base && iov->iov_len < 1)
 705                                 break;
 706                         /* check if type field is readable or not. */
 707                         if (iov->iov_len > 2 - len) {
 708                                 u8 __user *p = iov->iov_base;
 709                                 if (get_user(fl->fl_mh_type, &p[2 - len]))
 710                                         return -EFAULT;
 711                                 probed = 1;
 712                         } else
 713                                 len += iov->iov_len;
 714
 715                         break;
 716                 default:
 717                         probed = 1;
 718                         break;
 719                 }
 720                 if (probed)
 721                         break;
 722         }
 723         return 0;
 724 }
 725
 726 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
 727                    struct msghdr *msg, size_t len)
 728 {
 729         struct ipv6_txoptions opt_space;
 730         struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
 731         struct in6_addr *daddr, *final_p = NULL, final;
 732         struct inet_sock *inet = inet_sk(sk);
 733         struct ipv6_pinfo *np = inet6_sk(sk);
 734         struct raw6_sock *rp = raw6_sk(sk);
 735         struct ipv6_txoptions *opt = NULL;
 736         struct ip6_flowlabel *flowlabel = NULL;
 737         struct dst_entry *dst = NULL;
 738         struct flowi fl;
 739         int addr_len = msg->msg_namelen;
 740         int hlimit = -1;
 741         int tclass = -1;
 742         u16 proto;
 743         int err;
 744
 745         /* Rough check on arithmetic overflow,
 746            better check is made in ip6_append_data().
 747          */
 748         if (len > INT_MAX)
 749                 return -EMSGSIZE;
 750
 751         /* Mirror BSD error message compatibility */
 752         if (msg->msg_flags & MSG_OOB)
 753                 return -EOPNOTSUPP;
 754
 755         /*
 756          *      Get and verify the address.
 757          */
 758         memset(&fl, 0, sizeof(fl));
 759
 760         fl.mark = sk->sk_mark;
 761
 762         if (sin6) {
 763                 if (addr_len < SIN6_LEN_RFC2133)
 764                         return -EINVAL;
 765
 766                 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
 767                         return(-EAFNOSUPPORT);
 768
 769                 /* port is the proto value [0..255] carried in nexthdr */
 770                 proto = ntohs(sin6->sin6_port);
 771
 772                 if (!proto)
 773                         proto = inet->num;
 774                 else if (proto != inet->num)
 775                         return(-EINVAL);
 776
 777                 if (proto > 255)
 778                         return(-EINVAL);
 779
 780                 daddr = &sin6->sin6_addr;
 781                 if (np->sndflow) {
 782                         fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
 783                         if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
 784                                 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
 785                                 if (flowlabel == NULL)
 786                                         return -EINVAL;
 787                                 daddr = &flowlabel->dst;
 788                         }
 789                 }
 790
 791                 /*
 792                  * Otherwise it will be difficult to maintain
 793                  * sk->sk_dst_cache.
 794                  */
 795                 if (sk->sk_state == TCP_ESTABLISHED &&
 796                     ipv6_addr_equal(daddr, &np->daddr))
 797                         daddr = &np->daddr;
 798
 799                 if (addr_len >= sizeof(struct sockaddr_in6) &&
 800                     sin6->sin6_scope_id &&
 801                     ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
 802                         fl.oif = sin6->sin6_scope_id;
 803         } else {
 804                 if (sk->sk_state != TCP_ESTABLISHED)
 805                         return -EDESTADDRREQ;
 806
 807                 proto = inet->num;
 808                 daddr = &np->daddr;
 809                 fl.fl6_flowlabel = np->flow_label;
 810         }
 811
 812         if (ipv6_addr_any(daddr)) {
 813                 /*
 814                  * unspecified destination address
 815                  * treated as error... is this correct ?
 816                  */
 817                 fl6_sock_release(flowlabel);
 818                 return(-EINVAL);
 819         }
 820
 821         if (fl.oif == 0)
 822                 fl.oif = sk->sk_bound_dev_if;
 823
 824         if (msg->msg_controllen) {
 825                 opt = &opt_space;
 826                 memset(opt, 0, sizeof(struct ipv6_txoptions));
 827                 opt->tot_len = sizeof(struct ipv6_txoptions);
 828
 829                 err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
 830                 if (err < 0) {
 831                         fl6_sock_release(flowlabel);
 832                         return err;
 833                 }
 834                 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
 835                         flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
 836                         if (flowlabel == NULL)
 837                                 return -EINVAL;
 838                 }
 839                 if (!(opt->opt_nflen|opt->opt_flen))
 840                         opt = NULL;
 841         }
 842         if (opt == NULL)
 843                 opt = np->opt;
 844         if (flowlabel)
 845                 opt = fl6_merge_options(&opt_space, flowlabel, opt);
 846         opt = ipv6_fixup_options(&opt_space, opt);
 847
 848         fl.proto = proto;
 849         err = rawv6_probe_proto_opt(&fl, msg);
 850         if (err)
 851                 goto out;
 852
 853         ipv6_addr_copy(&fl.fl6_dst, daddr);
 854         if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
 855                 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
 856
 857         /* merge ip6_build_xmit from ip6_output */
 858         if (opt && opt->srcrt) {
 859                 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
 860                 ipv6_addr_copy(&final, &fl.fl6_dst);
 861                 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
 862                 final_p = &final;
 863         }
 864
 865         if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
 866                 fl.oif = np->mcast_oif;
 867         security_sk_classify_flow(sk, &fl);
 868
 869         err = ip6_dst_lookup(sk, &dst, &fl);
 870         if (err)
 871                 goto out;
 872         if (final_p)
 873                 ipv6_addr_copy(&fl.fl6_dst, final_p);
 874
 875         if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) {
 876                 if (err == -EREMOTE)
 877                         err = ip6_dst_blackhole(sk, &dst, &fl);
 878                 if (err < 0)
 879                         goto out;
 880         }
 881
 882         if (hlimit < 0) {
 883                 if (ipv6_addr_is_multicast(&fl.fl6_dst))
 884                         hlimit = np->mcast_hops;
 885                 else
 886                         hlimit = np->hop_limit;
 887                 if (hlimit < 0)
 888                         hlimit = dst_metric(dst, RTAX_HOPLIMIT);
 889                 if (hlimit < 0)
 890                         hlimit = ipv6_get_hoplimit(dst->dev);
 891         }
 892
 893         if (tclass < 0) {
 894                 tclass = np->tclass;
 895                 if (tclass < 0)
 896                         tclass = 0;
 897         }
 898
 899         if (msg->msg_flags&MSG_CONFIRM)
 900                 goto do_confirm;
 901
 902 back_from_confirm:
 903         if (inet->hdrincl) {
 904                 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
 905         } else {
 906                 lock_sock(sk);
 907                 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
 908                         len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
 909                         msg->msg_flags);
 910
 911                 if (err)
 912                         ip6_flush_pending_frames(sk);
 913                 else if (!(msg->msg_flags & MSG_MORE))
 914                         err = rawv6_push_pending_frames(sk, &fl, rp);
 915                 release_sock(sk);
 916         }
 917 done:
 918         dst_release(dst);
 919 out:
 920         fl6_sock_release(flowlabel);
 921         return err<0?err:len;
 922 do_confirm:
 923         dst_confirm(dst);
 924         if (!(msg->msg_flags & MSG_PROBE) || len)
 925                 goto back_from_confirm;
 926         err = 0;
 927         goto done;
 928 }
 929
 930 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
 931                                char __user *optval, int optlen)
 932 {
 933         switch (optname) {
 934         case ICMPV6_FILTER:
 935                 if (optlen > sizeof(struct icmp6_filter))
 936                         optlen = sizeof(struct icmp6_filter);
 937                 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
 938                         return -EFAULT;
 939                 return 0;
 940         default:
 941                 return -ENOPROTOOPT;
 942         }
 943
 944         return 0;
 945 }
 946
 947 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
 948                                char __user *optval, int __user *optlen)
 949 {
 950         int len;
 951
 952         switch (optname) {
 953         case ICMPV6_FILTER:
 954                 if (get_user(len, optlen))
 955                         return -EFAULT;
 956                 if (len < 0)
 957                         return -EINVAL;
 958                 if (len > sizeof(struct icmp6_filter))
 959                         len = sizeof(struct icmp6_filter);
 960                 if (put_user(len, optlen))
 961                         return -EFAULT;
 962                 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
 963                         return -EFAULT;
 964                 return 0;
 965         default:
 966                 return -ENOPROTOOPT;
 967         }
 968
 969         return 0;
 970 }
 971
 972
 973 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
 974                             char __user *optval, int optlen)
 975 {
 976         struct raw6_sock *rp = raw6_sk(sk);
 977         int val;
 978
 979         if (get_user(val, (int __user *)optval))
 980                 return -EFAULT;
 981
 982         switch (optname) {
 983                 case IPV6_CHECKSUM:
 984                         /* You may get strange result with a positive odd offset;
 985                            RFC2292bis agrees with me. */
 986                         if (val > 0 && (val&1))
 987                                 return(-EINVAL);
 988                         if (val < 0) {
 989                                 rp->checksum = 0;
 990                         } else {
 991                                 rp->checksum = 1;
 992                                 rp->offset = val;
 993                         }
 994
 995                         return 0;
 996                         break;
 997
 998                 default:
 999                         return(-ENOPROTOOPT);
1000         }
1001 }
1002
1003 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1004                           char __user *optval, int optlen)
1005 {
1006         switch(level) {
1007                 case SOL_RAW:
1008                         break;
1009
1010                 case SOL_ICMPV6:
1011                         if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1012                                 return -EOPNOTSUPP;
1013                         return rawv6_seticmpfilter(sk, level, optname, optval,
1014                                                    optlen);
1015                 case SOL_IPV6:
1016                         if (optname == IPV6_CHECKSUM)
1017                                 break;
1018                 default:
1019                         return ipv6_setsockopt(sk, level, optname, optval,
1020                                                optlen);
1021         }
1022
1023         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1024 }
1025
1026 #ifdef CONFIG_COMPAT
1027 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1028                                    char __user *optval, int optlen)
1029 {
1030         switch (level) {
1031         case SOL_RAW:
1032                 break;
1033         case SOL_ICMPV6:
1034                 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1035                         return -EOPNOTSUPP;
1036                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1037         case SOL_IPV6:
1038                 if (optname == IPV6_CHECKSUM)
1039                         break;
1040         default:
1041                 return compat_ipv6_setsockopt(sk, level, optname,
1042                                               optval, optlen);
1043         }
1044         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1045 }
1046 #endif
1047
1048 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1049                             char __user *optval, int __user *optlen)
1050 {
1051         struct raw6_sock *rp = raw6_sk(sk);
1052         int val, len;
1053
1054         if (get_user(len,optlen))
1055                 return -EFAULT;
1056
1057         switch (optname) {
1058         case IPV6_CHECKSUM:
1059                 if (rp->checksum == 0)
1060                         val = -1;
1061                 else
1062                         val = rp->offset;
1063                 break;
1064
1065         default:
1066                 return -ENOPROTOOPT;
1067         }
1068
1069         len = min_t(unsigned int, sizeof(int), len);
1070
1071         if (put_user(len, optlen))
1072                 return -EFAULT;
1073         if (copy_to_user(optval,&val,len))
1074                 return -EFAULT;
1075         return 0;
1076 }
1077
1078 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1079                           char __user *optval, int __user *optlen)
1080 {
1081         switch(level) {
1082                 case SOL_RAW:
1083                         break;
1084
1085                 case SOL_ICMPV6:
1086                         if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1087                                 return -EOPNOTSUPP;
1088                         return rawv6_geticmpfilter(sk, level, optname, optval,
1089                                                    optlen);
1090                 case SOL_IPV6:
1091                         if (optname == IPV6_CHECKSUM)
1092                                 break;
1093                 default:
1094                         return ipv6_getsockopt(sk, level, optname, optval,
1095                                                optlen);
1096         }
1097
1098         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1099 }
1100
1101 #ifdef CONFIG_COMPAT
1102 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1103                                    char __user *optval, int __user *optlen)
1104 {
1105         switch (level) {
1106         case SOL_RAW:
1107                 break;
1108         case SOL_ICMPV6:
1109                 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1110                         return -EOPNOTSUPP;
1111                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1112         case SOL_IPV6:
1113                 if (optname == IPV6_CHECKSUM)
1114                         break;
1115         default:
1116                 return compat_ipv6_getsockopt(sk, level, optname,
1117                                               optval, optlen);
1118         }
1119         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1120 }
1121 #endif
1122
1123 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1124 {
1125         switch(cmd) {
1126                 case SIOCOUTQ:
1127                 {
1128                         int amount = atomic_read(&sk->sk_wmem_alloc);
1129                         return put_user(amount, (int __user *)arg);
1130                 }
1131                 case SIOCINQ:
1132                 {
1133                         struct sk_buff *skb;
1134                         int amount = 0;
1135
1136                         spin_lock_bh(&sk->sk_receive_queue.lock);
1137                         skb = skb_peek(&sk->sk_receive_queue);
1138                         if (skb != NULL)
1139                                 amount = skb->tail - skb->transport_header;
1140                         spin_unlock_bh(&sk->sk_receive_queue.lock);
1141                         return put_user(amount, (int __user *)arg);
1142                 }
1143
1144                 default:
1145                         return -ENOIOCTLCMD;
1146         }
1147 }
1148
1149 static void rawv6_close(struct sock *sk, long timeout)
1150 {
1151         if (inet_sk(sk)->num == IPPROTO_RAW)
1152                 ip6_ra_control(sk, -1, NULL);
1153
1154         sk_common_release(sk);
1155 }
1156
1157 static int rawv6_init_sk(struct sock *sk)
1158 {
1159         struct raw6_sock *rp = raw6_sk(sk);
1160
1161         switch (inet_sk(sk)->num) {
1162         case IPPROTO_ICMPV6:
1163                 rp->checksum = 1;
1164                 rp->offset   = 2;
1165                 break;
1166         case IPPROTO_MH:
1167                 rp->checksum = 1;
1168                 rp->offset   = 4;
1169                 break;
1170         default:
1171                 break;
1172         }
1173         return(0);
1174 }
1175
1176 DEFINE_PROTO_INUSE(rawv6)
1177
1178 struct proto rawv6_prot = {
1179         .name              = "RAWv6",
1180         .owner             = THIS_MODULE,
1181         .close             = rawv6_close,
1182         .connect           = ip6_datagram_connect,
1183         .disconnect        = udp_disconnect,
1184         .ioctl             = rawv6_ioctl,
1185         .init              = rawv6_init_sk,
1186         .destroy           = inet6_destroy_sock,
1187         .setsockopt        = rawv6_setsockopt,
1188         .getsockopt        = rawv6_getsockopt,
1189         .sendmsg           = rawv6_sendmsg,
1190         .recvmsg           = rawv6_recvmsg,
1191         .bind              = rawv6_bind,
1192         .backlog_rcv       = rawv6_rcv_skb,
1193         .hash              = raw_hash_sk,
1194         .unhash            = raw_unhash_sk,
1195         .obj_size          = sizeof(struct raw6_sock),
1196         .h.raw_hash        = &raw_v6_hashinfo,
1197 #ifdef CONFIG_COMPAT
1198         .compat_setsockopt = compat_rawv6_setsockopt,
1199         .compat_getsockopt = compat_rawv6_getsockopt,
1200 #endif
1201         REF_PROTO_INUSE(rawv6)
1202 };
1203
1204 #ifdef CONFIG_PROC_FS
1205 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1206 {
1207         struct ipv6_pinfo *np = inet6_sk(sp);
1208         struct in6_addr *dest, *src;
1209         __u16 destp, srcp;
1210
1211         dest  = &np->daddr;
1212         src   = &np->rcv_saddr;
1213         destp = 0;
1214         srcp  = inet_sk(sp)->num;
1215         seq_printf(seq,
1216                    "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1217                    "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
1218                    i,
1219                    src->s6_addr32[0], src->s6_addr32[1],
1220                    src->s6_addr32[2], src->s6_addr32[3], srcp,
1221                    dest->s6_addr32[0], dest->s6_addr32[1],
1222                    dest->s6_addr32[2], dest->s6_addr32[3], destp,
1223                    sp->sk_state,
1224                    atomic_read(&sp->sk_wmem_alloc),
1225                    atomic_read(&sp->sk_rmem_alloc),
1226                    0, 0L, 0,
1227                    sock_i_uid(sp), 0,
1228                    sock_i_ino(sp),
1229                    atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1230 }
1231
1232 static int raw6_seq_show(struct seq_file *seq, void *v)
1233 {
1234         if (v == SEQ_START_TOKEN)
1235                 seq_printf(seq,
1236                            "  sl  "
1237                            "local_address                         "
1238                            "remote_address                        "
1239                            "st tx_queue rx_queue tr tm->when retrnsmt"
1240                            "   uid  timeout inode  drops\n");
1241         else
1242                 raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1243         return 0;
1244 }
1245
1246 static const struct seq_operations raw6_seq_ops = {
1247         .start =        raw_seq_start,
1248         .next =         raw_seq_next,
1249         .stop =         raw_seq_stop,
1250         .show =         raw6_seq_show,
1251 };
1252
1253 static int raw6_seq_open(struct inode *inode, struct file *file)
1254 {
1255         return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1256 }
1257
1258 static const struct file_operations raw6_seq_fops = {
1259         .owner =        THIS_MODULE,
1260         .open =         raw6_seq_open,
1261         .read =         seq_read,
1262         .llseek =       seq_lseek,
1263         .release =      seq_release_net,
1264 };
1265
1266 static int raw6_init_net(struct net *net)
1267 {
1268         if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops))
1269                 return -ENOMEM;
1270
1271         return 0;
1272 }
1273
1274 static void raw6_exit_net(struct net *net)
1275 {
1276         proc_net_remove(net, "raw6");
1277 }
1278
1279 static struct pernet_operations raw6_net_ops = {
1280         .init = raw6_init_net,
1281         .exit = raw6_exit_net,
1282 };
1283
1284 int __init raw6_proc_init(void)
1285 {
1286         return register_pernet_subsys(&raw6_net_ops);
1287 }
1288
1289 void raw6_proc_exit(void)
1290 {
1291         unregister_pernet_subsys(&raw6_net_ops);
1292 }
1293 #endif  /* CONFIG_PROC_FS */
1294
1295 /* Same as inet6_dgram_ops, sans udp_poll.  */
1296 static const struct proto_ops inet6_sockraw_ops = {
1297         .family            = PF_INET6,
1298         .owner             = THIS_MODULE,
1299         .release           = inet6_release,
1300         .bind              = inet6_bind,
1301         .connect           = inet_dgram_connect,        /* ok           */
1302         .socketpair        = sock_no_socketpair,        /* a do nothing */
1303         .accept            = sock_no_accept,            /* a do nothing */
1304         .getname           = inet6_getname,
1305         .poll              = datagram_poll,             /* ok           */
1306         .ioctl             = inet6_ioctl,               /* must change  */
1307         .listen            = sock_no_listen,            /* ok           */
1308         .shutdown          = inet_shutdown,             /* ok           */
1309         .setsockopt        = sock_common_setsockopt,    /* ok           */
1310         .getsockopt        = sock_common_getsockopt,    /* ok           */
1311         .sendmsg           = inet_sendmsg,              /* ok           */
1312         .recvmsg           = sock_common_recvmsg,       /* ok           */
1313         .mmap              = sock_no_mmap,
1314         .sendpage          = sock_no_sendpage,
1315 #ifdef CONFIG_COMPAT
1316         .compat_setsockopt = compat_sock_common_setsockopt,
1317         .compat_getsockopt = compat_sock_common_getsockopt,
1318 #endif
1319 };
1320
1321 static struct inet_protosw rawv6_protosw = {
1322         .type           = SOCK_RAW,
1323         .protocol       = IPPROTO_IP,   /* wild card */
1324         .prot           = &rawv6_prot,
1325         .ops            = &inet6_sockraw_ops,
1326         .capability     = CAP_NET_RAW,
1327         .no_check       = UDP_CSUM_DEFAULT,
1328         .flags          = INET_PROTOSW_REUSE,
1329 };
1330
1331 int __init rawv6_init(void)
1332 {
1333         int ret;
1334
1335         ret = inet6_register_protosw(&rawv6_protosw);
1336         if (ret)
1337                 goto out;
1338 out:
1339         return ret;
1340 }
1341
1342 void rawv6_exit(void)
1343 {
1344         inet6_unregister_protosw(&rawv6_protosw);
1345 }