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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(),
  66 };
  67
  68 static void raw_v6_hash(struct sock *sk)
  69 {
  70         raw_hash_sk(sk, &raw_v6_hashinfo);
  71 }
  72
  73 static void raw_v6_unhash(struct sock *sk)
  74 {
  75         raw_unhash_sk(sk, &raw_v6_hashinfo);
  76 }
  77
  78
  79 static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
  80                 unsigned short num, struct in6_addr *loc_addr,
  81                 struct in6_addr *rmt_addr, int dif)
  82 {
  83         struct hlist_node *node;
  84         int is_multicast = ipv6_addr_is_multicast(loc_addr);
  85
  86         sk_for_each_from(sk, node)
  87                 if (inet_sk(sk)->num == num) {
  88                         struct ipv6_pinfo *np = inet6_sk(sk);
  89
  90                         if (sk->sk_net != net)
  91                                 continue;
  92
  93                         if (!ipv6_addr_any(&np->daddr) &&
  94                             !ipv6_addr_equal(&np->daddr, rmt_addr))
  95                                 continue;
  96
  97                         if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
  98                                 continue;
  99
 100                         if (!ipv6_addr_any(&np->rcv_saddr)) {
 101                                 if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
 102                                         goto found;
 103                                 if (is_multicast &&
 104                                     inet6_mc_check(sk, loc_addr, rmt_addr))
 105                                         goto found;
 106                                 continue;
 107                         }
 108                         goto found;
 109                 }
 110         sk = NULL;
 111 found:
 112         return sk;
 113 }
 114
 115 /*
 116  *      0 - deliver
 117  *      1 - block
 118  */
 119 static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
 120 {
 121         struct icmp6hdr *icmph;
 122         struct raw6_sock *rp = raw6_sk(sk);
 123
 124         if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) {
 125                 __u32 *data = &rp->filter.data[0];
 126                 int bit_nr;
 127
 128                 icmph = (struct icmp6hdr *) skb->data;
 129                 bit_nr = icmph->icmp6_type;
 130
 131                 return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0;
 132         }
 133         return 0;
 134 }
 135
 136 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 137 static int (*mh_filter)(struct sock *sock, struct sk_buff *skb);
 138
 139 int rawv6_mh_filter_register(int (*filter)(struct sock *sock,
 140                                            struct sk_buff *skb))
 141 {
 142         rcu_assign_pointer(mh_filter, filter);
 143         return 0;
 144 }
 145 EXPORT_SYMBOL(rawv6_mh_filter_register);
 146
 147 int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock,
 148                                              struct sk_buff *skb))
 149 {
 150         rcu_assign_pointer(mh_filter, NULL);
 151         synchronize_rcu();
 152         return 0;
 153 }
 154 EXPORT_SYMBOL(rawv6_mh_filter_unregister);
 155
 156 #endif
 157
 158 /*
 159  *      demultiplex raw sockets.
 160  *      (should consider queueing the skb in the sock receive_queue
 161  *      without calling rawv6.c)
 162  *
 163  *      Caller owns SKB so we must make clones.
 164  */
 165 static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
 166 {
 167         struct in6_addr *saddr;
 168         struct in6_addr *daddr;
 169         struct sock *sk;
 170         int delivered = 0;
 171         __u8 hash;
 172         struct net *net;
 173
 174         saddr = &ipv6_hdr(skb)->saddr;
 175         daddr = saddr + 1;
 176
 177         hash = nexthdr & (MAX_INET_PROTOS - 1);
 178
 179         read_lock(&raw_v6_hashinfo.lock);
 180         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 181
 182         /*
 183          *      The first socket found will be delivered after
 184          *      delivery to transport protocols.
 185          */
 186
 187         if (sk == NULL)
 188                 goto out;
 189
 190         net = skb->dev->nd_net;
 191         sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
 192
 193         while (sk) {
 194                 int filtered;
 195
 196                 delivered = 1;
 197                 switch (nexthdr) {
 198                 case IPPROTO_ICMPV6:
 199                         filtered = icmpv6_filter(sk, skb);
 200                         break;
 201
 202 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 203                 case IPPROTO_MH:
 204                 {
 205                         /* XXX: To validate MH only once for each packet,
 206                          * this is placed here. It should be after checking
 207                          * xfrm policy, however it doesn't. The checking xfrm
 208                          * policy is placed in rawv6_rcv() because it is
 209                          * required for each socket.
 210                          */
 211                         int (*filter)(struct sock *sock, struct sk_buff *skb);
 212
 213                         filter = rcu_dereference(mh_filter);
 214                         filtered = filter ? filter(sk, skb) : 0;
 215                         break;
 216                 }
 217 #endif
 218                 default:
 219                         filtered = 0;
 220                         break;
 221                 }
 222
 223                 if (filtered < 0)
 224                         break;
 225                 if (filtered == 0) {
 226                         struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
 227
 228                         /* Not releasing hash table! */
 229                         if (clone) {
 230                                 nf_reset(clone);
 231                                 rawv6_rcv(sk, clone);
 232                         }
 233                 }
 234                 sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
 235                                      IP6CB(skb)->iif);
 236         }
 237 out:
 238         read_unlock(&raw_v6_hashinfo.lock);
 239         return delivered;
 240 }
 241
 242 int raw6_local_deliver(struct sk_buff *skb, int nexthdr)
 243 {
 244         struct sock *raw_sk;
 245
 246         raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]);
 247         if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
 248                 raw_sk = NULL;
 249
 250         return raw_sk != NULL;
 251 }
 252
 253 /* This cleans up af_inet6 a bit. -DaveM */
 254 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 255 {
 256         struct inet_sock *inet = inet_sk(sk);
 257         struct ipv6_pinfo *np = inet6_sk(sk);
 258         struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
 259         __be32 v4addr = 0;
 260         int addr_type;
 261         int err;
 262
 263         if (addr_len < SIN6_LEN_RFC2133)
 264                 return -EINVAL;
 265         addr_type = ipv6_addr_type(&addr->sin6_addr);
 266
 267         /* Raw sockets are IPv6 only */
 268         if (addr_type == IPV6_ADDR_MAPPED)
 269                 return(-EADDRNOTAVAIL);
 270
 271         lock_sock(sk);
 272
 273         err = -EINVAL;
 274         if (sk->sk_state != TCP_CLOSE)
 275                 goto out;
 276
 277         /* Check if the address belongs to the host. */
 278         if (addr_type != IPV6_ADDR_ANY) {
 279                 struct net_device *dev = NULL;
 280
 281                 if (addr_type & IPV6_ADDR_LINKLOCAL) {
 282                         if (addr_len >= sizeof(struct sockaddr_in6) &&
 283                             addr->sin6_scope_id) {
 284                                 /* Override any existing binding, if another
 285                                  * one is supplied by user.
 286                                  */
 287                                 sk->sk_bound_dev_if = addr->sin6_scope_id;
 288                         }
 289
 290                         /* Binding to link-local address requires an interface */
 291                         if (!sk->sk_bound_dev_if)
 292                                 goto out;
 293
 294                         dev = dev_get_by_index(&init_net, sk->sk_bound_dev_if);
 295                         if (!dev) {
 296                                 err = -ENODEV;
 297                                 goto out;
 298                         }
 299                 }
 300
 301                 /* ipv4 addr of the socket is invalid.  Only the
 302                  * unspecified and mapped address have a v4 equivalent.
 303                  */
 304                 v4addr = LOOPBACK4_IPV6;
 305                 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
 306                         err = -EADDRNOTAVAIL;
 307                         if (!ipv6_chk_addr(&init_net, &addr->sin6_addr,
 308                                            dev, 0)) {
 309                                 if (dev)
 310                                         dev_put(dev);
 311                                 goto out;
 312                         }
 313                 }
 314                 if (dev)
 315                         dev_put(dev);
 316         }
 317
 318         inet->rcv_saddr = inet->saddr = v4addr;
 319         ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
 320         if (!(addr_type & IPV6_ADDR_MULTICAST))
 321                 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
 322         err = 0;
 323 out:
 324         release_sock(sk);
 325         return err;
 326 }
 327
 328 static void rawv6_err(struct sock *sk, struct sk_buff *skb,
 329                struct inet6_skb_parm *opt,
 330                int type, int code, int offset, __be32 info)
 331 {
 332         struct inet_sock *inet = inet_sk(sk);
 333         struct ipv6_pinfo *np = inet6_sk(sk);
 334         int err;
 335         int harderr;
 336
 337         /* Report error on raw socket, if:
 338            1. User requested recverr.
 339            2. Socket is connected (otherwise the error indication
 340               is useless without recverr and error is hard.
 341          */
 342         if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
 343                 return;
 344
 345         harderr = icmpv6_err_convert(type, code, &err);
 346         if (type == ICMPV6_PKT_TOOBIG)
 347                 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
 348
 349         if (np->recverr) {
 350                 u8 *payload = skb->data;
 351                 if (!inet->hdrincl)
 352                         payload += offset;
 353                 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
 354         }
 355
 356         if (np->recverr || harderr) {
 357                 sk->sk_err = err;
 358                 sk->sk_error_report(sk);
 359         }
 360 }
 361
 362 void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
 363                 int type, int code, int inner_offset, __be32 info)
 364 {
 365         struct sock *sk;
 366         int hash;
 367         struct in6_addr *saddr, *daddr;
 368         struct net *net;
 369
 370         hash = nexthdr & (RAW_HTABLE_SIZE - 1);
 371
 372         read_lock(&raw_v6_hashinfo.lock);
 373         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 374         if (sk != NULL) {
 375                 saddr = &ipv6_hdr(skb)->saddr;
 376                 daddr = &ipv6_hdr(skb)->daddr;
 377                 net = skb->dev->nd_net;
 378
 379                 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
 380                                                 IP6CB(skb)->iif))) {
 381                         rawv6_err(sk, skb, NULL, type, code,
 382                                         inner_offset, info);
 383                         sk = sk_next(sk);
 384                 }
 385         }
 386         read_unlock(&raw_v6_hashinfo.lock);
 387 }
 388
 389 static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
 390 {
 391         if ((raw6_sk(sk)->checksum || sk->sk_filter) &&
 392             skb_checksum_complete(skb)) {
 393                 atomic_inc(&sk->sk_drops);
 394                 kfree_skb(skb);
 395                 return 0;
 396         }
 397
 398         /* Charge it to the socket. */
 399         if (sock_queue_rcv_skb(sk,skb)<0) {
 400                 atomic_inc(&sk->sk_drops);
 401                 kfree_skb(skb);
 402                 return 0;
 403         }
 404
 405         return 0;
 406 }
 407
 408 /*
 409  *      This is next to useless...
 410  *      if we demultiplex in network layer we don't need the extra call
 411  *      just to queue the skb...
 412  *      maybe we could have the network decide upon a hint if it
 413  *      should call raw_rcv for demultiplexing
 414  */
 415 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
 416 {
 417         struct inet_sock *inet = inet_sk(sk);
 418         struct raw6_sock *rp = raw6_sk(sk);
 419
 420         if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
 421                 atomic_inc(&sk->sk_drops);
 422                 kfree_skb(skb);
 423                 return NET_RX_DROP;
 424         }
 425
 426         if (!rp->checksum)
 427                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 428
 429         if (skb->ip_summed == CHECKSUM_COMPLETE) {
 430                 skb_postpull_rcsum(skb, skb_network_header(skb),
 431                                    skb_network_header_len(skb));
 432                 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 433                                      &ipv6_hdr(skb)->daddr,
 434                                      skb->len, inet->num, skb->csum))
 435                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 436         }
 437         if (!skb_csum_unnecessary(skb))
 438                 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 439                                                          &ipv6_hdr(skb)->daddr,
 440                                                          skb->len,
 441                                                          inet->num, 0));
 442
 443         if (inet->hdrincl) {
 444                 if (skb_checksum_complete(skb)) {
 445                         atomic_inc(&sk->sk_drops);
 446                         kfree_skb(skb);
 447                         return 0;
 448                 }
 449         }
 450
 451         rawv6_rcv_skb(sk, skb);
 452         return 0;
 453 }
 454
 455
 456 /*
 457  *      This should be easy, if there is something there
 458  *      we return it, otherwise we block.
 459  */
 460
 461 static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
 462                   struct msghdr *msg, size_t len,
 463                   int noblock, int flags, int *addr_len)
 464 {
 465         struct ipv6_pinfo *np = inet6_sk(sk);
 466         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
 467         struct sk_buff *skb;
 468         size_t copied;
 469         int err;
 470
 471         if (flags & MSG_OOB)
 472                 return -EOPNOTSUPP;
 473
 474         if (addr_len)
 475                 *addr_len=sizeof(*sin6);
 476
 477         if (flags & MSG_ERRQUEUE)
 478                 return ipv6_recv_error(sk, msg, len);
 479
 480         skb = skb_recv_datagram(sk, flags, noblock, &err);
 481         if (!skb)
 482                 goto out;
 483
 484         copied = skb->len;
 485         if (copied > len) {
 486                 copied = len;
 487                 msg->msg_flags |= MSG_TRUNC;
 488         }
 489
 490         if (skb_csum_unnecessary(skb)) {
 491                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 492         } else if (msg->msg_flags&MSG_TRUNC) {
 493                 if (__skb_checksum_complete(skb))
 494                         goto csum_copy_err;
 495                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 496         } else {
 497                 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
 498                 if (err == -EINVAL)
 499                         goto csum_copy_err;
 500         }
 501         if (err)
 502                 goto out_free;
 503
 504         /* Copy the address. */
 505         if (sin6) {
 506                 sin6->sin6_family = AF_INET6;
 507                 sin6->sin6_port = 0;
 508                 ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr);
 509                 sin6->sin6_flowinfo = 0;
 510                 sin6->sin6_scope_id = 0;
 511                 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
 512                         sin6->sin6_scope_id = IP6CB(skb)->iif;
 513         }
 514
 515         sock_recv_timestamp(msg, sk, skb);
 516
 517         if (np->rxopt.all)
 518                 datagram_recv_ctl(sk, msg, skb);
 519
 520         err = copied;
 521         if (flags & MSG_TRUNC)
 522                 err = skb->len;
 523
 524 out_free:
 525         skb_free_datagram(sk, skb);
 526 out:
 527         return err;
 528
 529 csum_copy_err:
 530         skb_kill_datagram(sk, skb, flags);
 531
 532         /* Error for blocking case is chosen to masquerade
 533            as some normal condition.
 534          */
 535         err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
 536         atomic_inc(&sk->sk_drops);
 537         goto out;
 538 }
 539
 540 static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
 541                                      struct raw6_sock *rp)
 542 {
 543         struct sk_buff *skb;
 544         int err = 0;
 545         int offset;
 546         int len;
 547         int total_len;
 548         __wsum tmp_csum;
 549         __sum16 csum;
 550
 551         if (!rp->checksum)
 552                 goto send;
 553
 554         if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
 555                 goto out;
 556
 557         offset = rp->offset;
 558         total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) -
 559                                                 skb->data);
 560         if (offset >= total_len - 1) {
 561                 err = -EINVAL;
 562                 ip6_flush_pending_frames(sk);
 563                 goto out;
 564         }
 565
 566         /* should be check HW csum miyazawa */
 567         if (skb_queue_len(&sk->sk_write_queue) == 1) {
 568                 /*
 569                  * Only one fragment on the socket.
 570                  */
 571                 tmp_csum = skb->csum;
 572         } else {
 573                 struct sk_buff *csum_skb = NULL;
 574                 tmp_csum = 0;
 575
 576                 skb_queue_walk(&sk->sk_write_queue, skb) {
 577                         tmp_csum = csum_add(tmp_csum, skb->csum);
 578
 579                         if (csum_skb)
 580                                 continue;
 581
 582                         len = skb->len - skb_transport_offset(skb);
 583                         if (offset >= len) {
 584                                 offset -= len;
 585                                 continue;
 586                         }
 587
 588                         csum_skb = skb;
 589                 }
 590
 591                 skb = csum_skb;
 592         }
 593
 594         offset += skb_transport_offset(skb);
 595         if (skb_copy_bits(skb, offset, &csum, 2))
 596                 BUG();
 597
 598         /* in case cksum was not initialized */
 599         if (unlikely(csum))
 600                 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
 601
 602         csum = csum_ipv6_magic(&fl->fl6_src,
 603                                    &fl->fl6_dst,
 604                                    total_len, fl->proto, tmp_csum);
 605
 606         if (csum == 0 && fl->proto == IPPROTO_UDP)
 607                 csum = CSUM_MANGLED_0;
 608
 609         if (skb_store_bits(skb, offset, &csum, 2))
 610                 BUG();
 611
 612 send:
 613         err = ip6_push_pending_frames(sk);
 614 out:
 615         return err;
 616 }
 617
 618 static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
 619                         struct flowi *fl, struct rt6_info *rt,
 620                         unsigned int flags)
 621 {
 622         struct ipv6_pinfo *np = inet6_sk(sk);
 623         struct ipv6hdr *iph;
 624         struct sk_buff *skb;
 625         unsigned int hh_len;
 626         int err;
 627
 628         if (length > rt->u.dst.dev->mtu) {
 629                 ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
 630                 return -EMSGSIZE;
 631         }
 632         if (flags&MSG_PROBE)
 633                 goto out;
 634
 635         hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
 636
 637         skb = sock_alloc_send_skb(sk, length+hh_len+15,
 638                                   flags&MSG_DONTWAIT, &err);
 639         if (skb == NULL)
 640                 goto error;
 641         skb_reserve(skb, hh_len);
 642
 643         skb->priority = sk->sk_priority;
 644         skb->dst = dst_clone(&rt->u.dst);
 645
 646         skb_put(skb, length);
 647         skb_reset_network_header(skb);
 648         iph = ipv6_hdr(skb);
 649
 650         skb->ip_summed = CHECKSUM_NONE;
 651
 652         skb->transport_header = skb->network_header;
 653         err = memcpy_fromiovecend((void *)iph, from, 0, length);
 654         if (err)
 655                 goto error_fault;
 656
 657         IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS);
 658         err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
 659                       dst_output);
 660         if (err > 0)
 661                 err = np->recverr ? net_xmit_errno(err) : 0;
 662         if (err)
 663                 goto error;
 664 out:
 665         return 0;
 666
 667 error_fault:
 668         err = -EFAULT;
 669         kfree_skb(skb);
 670 error:
 671         IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
 672         return err;
 673 }
 674
 675 static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
 676 {
 677         struct iovec *iov;
 678         u8 __user *type = NULL;
 679         u8 __user *code = NULL;
 680         u8 len = 0;
 681         int probed = 0;
 682         int i;
 683
 684         if (!msg->msg_iov)
 685                 return 0;
 686
 687         for (i = 0; i < msg->msg_iovlen; i++) {
 688                 iov = &msg->msg_iov[i];
 689                 if (!iov)
 690                         continue;
 691
 692                 switch (fl->proto) {
 693                 case IPPROTO_ICMPV6:
 694                         /* check if one-byte field is readable or not. */
 695                         if (iov->iov_base && iov->iov_len < 1)
 696                                 break;
 697
 698                         if (!type) {
 699                                 type = iov->iov_base;
 700                                 /* check if code field is readable or not. */
 701                                 if (iov->iov_len > 1)
 702                                         code = type + 1;
 703                         } else if (!code)
 704                                 code = iov->iov_base;
 705
 706                         if (type && code) {
 707                                 if (get_user(fl->fl_icmp_type, type) ||
 708                                     get_user(fl->fl_icmp_code, code))
 709                                         return -EFAULT;
 710                                 probed = 1;
 711                         }
 712                         break;
 713                 case IPPROTO_MH:
 714                         if (iov->iov_base && iov->iov_len < 1)
 715                                 break;
 716                         /* check if type field is readable or not. */
 717                         if (iov->iov_len > 2 - len) {
 718                                 u8 __user *p = iov->iov_base;
 719                                 if (get_user(fl->fl_mh_type, &p[2 - len]))
 720                                         return -EFAULT;
 721                                 probed = 1;
 722                         } else
 723                                 len += iov->iov_len;
 724
 725                         break;
 726                 default:
 727                         probed = 1;
 728                         break;
 729                 }
 730                 if (probed)
 731                         break;
 732         }
 733         return 0;
 734 }
 735
 736 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
 737                    struct msghdr *msg, size_t len)
 738 {
 739         struct ipv6_txoptions opt_space;
 740         struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
 741         struct in6_addr *daddr, *final_p = NULL, final;
 742         struct inet_sock *inet = inet_sk(sk);
 743         struct ipv6_pinfo *np = inet6_sk(sk);
 744         struct raw6_sock *rp = raw6_sk(sk);
 745         struct ipv6_txoptions *opt = NULL;
 746         struct ip6_flowlabel *flowlabel = NULL;
 747         struct dst_entry *dst = NULL;
 748         struct flowi fl;
 749         int addr_len = msg->msg_namelen;
 750         int hlimit = -1;
 751         int tclass = -1;
 752         u16 proto;
 753         int err;
 754
 755         /* Rough check on arithmetic overflow,
 756            better check is made in ip6_append_data().
 757          */
 758         if (len > INT_MAX)
 759                 return -EMSGSIZE;
 760
 761         /* Mirror BSD error message compatibility */
 762         if (msg->msg_flags & MSG_OOB)
 763                 return -EOPNOTSUPP;
 764
 765         /*
 766          *      Get and verify the address.
 767          */
 768         memset(&fl, 0, sizeof(fl));
 769
 770         if (sin6) {
 771                 if (addr_len < SIN6_LEN_RFC2133)
 772                         return -EINVAL;
 773
 774                 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
 775                         return(-EAFNOSUPPORT);
 776
 777                 /* port is the proto value [0..255] carried in nexthdr */
 778                 proto = ntohs(sin6->sin6_port);
 779
 780                 if (!proto)
 781                         proto = inet->num;
 782                 else if (proto != inet->num)
 783                         return(-EINVAL);
 784
 785                 if (proto > 255)
 786                         return(-EINVAL);
 787
 788                 daddr = &sin6->sin6_addr;
 789                 if (np->sndflow) {
 790                         fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
 791                         if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
 792                                 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
 793                                 if (flowlabel == NULL)
 794                                         return -EINVAL;
 795                                 daddr = &flowlabel->dst;
 796                         }
 797                 }
 798
 799                 /*
 800                  * Otherwise it will be difficult to maintain
 801                  * sk->sk_dst_cache.
 802                  */
 803                 if (sk->sk_state == TCP_ESTABLISHED &&
 804                     ipv6_addr_equal(daddr, &np->daddr))
 805                         daddr = &np->daddr;
 806
 807                 if (addr_len >= sizeof(struct sockaddr_in6) &&
 808                     sin6->sin6_scope_id &&
 809                     ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
 810                         fl.oif = sin6->sin6_scope_id;
 811         } else {
 812                 if (sk->sk_state != TCP_ESTABLISHED)
 813                         return -EDESTADDRREQ;
 814
 815                 proto = inet->num;
 816                 daddr = &np->daddr;
 817                 fl.fl6_flowlabel = np->flow_label;
 818         }
 819
 820         if (ipv6_addr_any(daddr)) {
 821                 /*
 822                  * unspecified destination address
 823                  * treated as error... is this correct ?
 824                  */
 825                 fl6_sock_release(flowlabel);
 826                 return(-EINVAL);
 827         }
 828
 829         if (fl.oif == 0)
 830                 fl.oif = sk->sk_bound_dev_if;
 831
 832         if (msg->msg_controllen) {
 833                 opt = &opt_space;
 834                 memset(opt, 0, sizeof(struct ipv6_txoptions));
 835                 opt->tot_len = sizeof(struct ipv6_txoptions);
 836
 837                 err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
 838                 if (err < 0) {
 839                         fl6_sock_release(flowlabel);
 840                         return err;
 841                 }
 842                 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
 843                         flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
 844                         if (flowlabel == NULL)
 845                                 return -EINVAL;
 846                 }
 847                 if (!(opt->opt_nflen|opt->opt_flen))
 848                         opt = NULL;
 849         }
 850         if (opt == NULL)
 851                 opt = np->opt;
 852         if (flowlabel)
 853                 opt = fl6_merge_options(&opt_space, flowlabel, opt);
 854         opt = ipv6_fixup_options(&opt_space, opt);
 855
 856         fl.proto = proto;
 857         err = rawv6_probe_proto_opt(&fl, msg);
 858         if (err)
 859                 goto out;
 860
 861         ipv6_addr_copy(&fl.fl6_dst, daddr);
 862         if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
 863                 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
 864
 865         /* merge ip6_build_xmit from ip6_output */
 866         if (opt && opt->srcrt) {
 867                 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
 868                 ipv6_addr_copy(&final, &fl.fl6_dst);
 869                 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
 870                 final_p = &final;
 871         }
 872
 873         if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
 874                 fl.oif = np->mcast_oif;
 875         security_sk_classify_flow(sk, &fl);
 876
 877         err = ip6_dst_lookup(sk, &dst, &fl);
 878         if (err)
 879                 goto out;
 880         if (final_p)
 881                 ipv6_addr_copy(&fl.fl6_dst, final_p);
 882
 883         if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) {
 884                 if (err == -EREMOTE)
 885                         err = ip6_dst_blackhole(sk, &dst, &fl);
 886                 if (err < 0)
 887                         goto out;
 888         }
 889
 890         if (hlimit < 0) {
 891                 if (ipv6_addr_is_multicast(&fl.fl6_dst))
 892                         hlimit = np->mcast_hops;
 893                 else
 894                         hlimit = np->hop_limit;
 895                 if (hlimit < 0)
 896                         hlimit = dst_metric(dst, RTAX_HOPLIMIT);
 897                 if (hlimit < 0)
 898                         hlimit = ipv6_get_hoplimit(dst->dev);
 899         }
 900
 901         if (tclass < 0) {
 902                 tclass = np->tclass;
 903                 if (tclass < 0)
 904                         tclass = 0;
 905         }
 906
 907         if (msg->msg_flags&MSG_CONFIRM)
 908                 goto do_confirm;
 909
 910 back_from_confirm:
 911         if (inet->hdrincl) {
 912                 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
 913         } else {
 914                 lock_sock(sk);
 915                 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
 916                         len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
 917                         msg->msg_flags);
 918
 919                 if (err)
 920                         ip6_flush_pending_frames(sk);
 921                 else if (!(msg->msg_flags & MSG_MORE))
 922                         err = rawv6_push_pending_frames(sk, &fl, rp);
 923                 release_sock(sk);
 924         }
 925 done:
 926         dst_release(dst);
 927 out:
 928         fl6_sock_release(flowlabel);
 929         return err<0?err:len;
 930 do_confirm:
 931         dst_confirm(dst);
 932         if (!(msg->msg_flags & MSG_PROBE) || len)
 933                 goto back_from_confirm;
 934         err = 0;
 935         goto done;
 936 }
 937
 938 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
 939                                char __user *optval, int optlen)
 940 {
 941         switch (optname) {
 942         case ICMPV6_FILTER:
 943                 if (optlen > sizeof(struct icmp6_filter))
 944                         optlen = sizeof(struct icmp6_filter);
 945                 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
 946                         return -EFAULT;
 947                 return 0;
 948         default:
 949                 return -ENOPROTOOPT;
 950         }
 951
 952         return 0;
 953 }
 954
 955 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
 956                                char __user *optval, int __user *optlen)
 957 {
 958         int len;
 959
 960         switch (optname) {
 961         case ICMPV6_FILTER:
 962                 if (get_user(len, optlen))
 963                         return -EFAULT;
 964                 if (len < 0)
 965                         return -EINVAL;
 966                 if (len > sizeof(struct icmp6_filter))
 967                         len = sizeof(struct icmp6_filter);
 968                 if (put_user(len, optlen))
 969                         return -EFAULT;
 970                 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
 971                         return -EFAULT;
 972                 return 0;
 973         default:
 974                 return -ENOPROTOOPT;
 975         }
 976
 977         return 0;
 978 }
 979
 980
 981 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
 982                             char __user *optval, int optlen)
 983 {
 984         struct raw6_sock *rp = raw6_sk(sk);
 985         int val;
 986
 987         if (get_user(val, (int __user *)optval))
 988                 return -EFAULT;
 989
 990         switch (optname) {
 991                 case IPV6_CHECKSUM:
 992                         /* You may get strange result with a positive odd offset;
 993                            RFC2292bis agrees with me. */
 994                         if (val > 0 && (val&1))
 995                                 return(-EINVAL);
 996                         if (val < 0) {
 997                                 rp->checksum = 0;
 998                         } else {
 999                                 rp->checksum = 1;
1000                                 rp->offset = val;
1001                         }
1002
1003                         return 0;
1004                         break;
1005
1006                 default:
1007                         return(-ENOPROTOOPT);
1008         }
1009 }
1010
1011 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1012                           char __user *optval, int optlen)
1013 {
1014         switch(level) {
1015                 case SOL_RAW:
1016                         break;
1017
1018                 case SOL_ICMPV6:
1019                         if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1020                                 return -EOPNOTSUPP;
1021                         return rawv6_seticmpfilter(sk, level, optname, optval,
1022                                                    optlen);
1023                 case SOL_IPV6:
1024                         if (optname == IPV6_CHECKSUM)
1025                                 break;
1026                 default:
1027                         return ipv6_setsockopt(sk, level, optname, optval,
1028                                                optlen);
1029         }
1030
1031         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1032 }
1033
1034 #ifdef CONFIG_COMPAT
1035 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1036                                    char __user *optval, int optlen)
1037 {
1038         switch (level) {
1039         case SOL_RAW:
1040                 break;
1041         case SOL_ICMPV6:
1042                 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1043                         return -EOPNOTSUPP;
1044                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1045         case SOL_IPV6:
1046                 if (optname == IPV6_CHECKSUM)
1047                         break;
1048         default:
1049                 return compat_ipv6_setsockopt(sk, level, optname,
1050                                               optval, optlen);
1051         }
1052         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1053 }
1054 #endif
1055
1056 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1057                             char __user *optval, int __user *optlen)
1058 {
1059         struct raw6_sock *rp = raw6_sk(sk);
1060         int val, len;
1061
1062         if (get_user(len,optlen))
1063                 return -EFAULT;
1064
1065         switch (optname) {
1066         case IPV6_CHECKSUM:
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                         return -ENOIOCTLCMD;
1154         }
1155 }
1156
1157 static void rawv6_close(struct sock *sk, long timeout)
1158 {
1159         if (inet_sk(sk)->num == IPPROTO_RAW)
1160                 ip6_ra_control(sk, -1, NULL);
1161
1162         sk_common_release(sk);
1163 }
1164
1165 static int rawv6_init_sk(struct sock *sk)
1166 {
1167         struct raw6_sock *rp = raw6_sk(sk);
1168
1169         switch (inet_sk(sk)->num) {
1170         case IPPROTO_ICMPV6:
1171                 rp->checksum = 1;
1172                 rp->offset   = 2;
1173                 break;
1174         case IPPROTO_MH:
1175                 rp->checksum = 1;
1176                 rp->offset   = 4;
1177                 break;
1178         default:
1179                 break;
1180         }
1181         return(0);
1182 }
1183
1184 DEFINE_PROTO_INUSE(rawv6)
1185
1186 struct proto rawv6_prot = {
1187         .name              = "RAWv6",
1188         .owner             = THIS_MODULE,
1189         .close             = rawv6_close,
1190         .connect           = ip6_datagram_connect,
1191         .disconnect        = udp_disconnect,
1192         .ioctl             = rawv6_ioctl,
1193         .init              = rawv6_init_sk,
1194         .destroy           = inet6_destroy_sock,
1195         .setsockopt        = rawv6_setsockopt,
1196         .getsockopt        = rawv6_getsockopt,
1197         .sendmsg           = rawv6_sendmsg,
1198         .recvmsg           = rawv6_recvmsg,
1199         .bind              = rawv6_bind,
1200         .backlog_rcv       = rawv6_rcv_skb,
1201         .hash              = raw_v6_hash,
1202         .unhash            = raw_v6_unhash,
1203         .obj_size          = sizeof(struct raw6_sock),
1204 #ifdef CONFIG_COMPAT
1205         .compat_setsockopt = compat_rawv6_setsockopt,
1206         .compat_getsockopt = compat_rawv6_getsockopt,
1207 #endif
1208         REF_PROTO_INUSE(rawv6)
1209 };
1210
1211 #ifdef CONFIG_PROC_FS
1212 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1213 {
1214         struct ipv6_pinfo *np = inet6_sk(sp);
1215         struct in6_addr *dest, *src;
1216         __u16 destp, srcp;
1217
1218         dest  = &np->daddr;
1219         src   = &np->rcv_saddr;
1220         destp = 0;
1221         srcp  = inet_sk(sp)->num;
1222         seq_printf(seq,
1223                    "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1224                    "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
1225                    i,
1226                    src->s6_addr32[0], src->s6_addr32[1],
1227                    src->s6_addr32[2], src->s6_addr32[3], srcp,
1228                    dest->s6_addr32[0], dest->s6_addr32[1],
1229                    dest->s6_addr32[2], dest->s6_addr32[3], destp,
1230                    sp->sk_state,
1231                    atomic_read(&sp->sk_wmem_alloc),
1232                    atomic_read(&sp->sk_rmem_alloc),
1233                    0, 0L, 0,
1234                    sock_i_uid(sp), 0,
1235                    sock_i_ino(sp),
1236                    atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1237 }
1238
1239 static int raw6_seq_show(struct seq_file *seq, void *v)
1240 {
1241         if (v == SEQ_START_TOKEN)
1242                 seq_printf(seq,
1243                            "  sl  "
1244                            "local_address                         "
1245                            "remote_address                        "
1246                            "st tx_queue rx_queue tr tm->when retrnsmt"
1247                            "   uid  timeout inode  drops\n");
1248         else
1249                 raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1250         return 0;
1251 }
1252
1253 static const struct seq_operations raw6_seq_ops = {
1254         .start =        raw_seq_start,
1255         .next =         raw_seq_next,
1256         .stop =         raw_seq_stop,
1257         .show =         raw6_seq_show,
1258 };
1259
1260 static int raw6_seq_open(struct inode *inode, struct file *file)
1261 {
1262         return raw_seq_open(inode, file, &raw_v6_hashinfo, PF_INET6);
1263 }
1264
1265 static const struct file_operations raw6_seq_fops = {
1266         .owner =        THIS_MODULE,
1267         .open =         raw6_seq_open,
1268         .read =         seq_read,
1269         .llseek =       seq_lseek,
1270         .release =      seq_release_net,
1271 };
1272
1273 int __init raw6_proc_init(void)
1274 {
1275         if (!proc_net_fops_create(&init_net, "raw6", S_IRUGO, &raw6_seq_fops))
1276                 return -ENOMEM;
1277         return 0;
1278 }
1279
1280 void raw6_proc_exit(void)
1281 {
1282         proc_net_remove(&init_net, "raw6");
1283 }
1284 #endif  /* CONFIG_PROC_FS */
1285
1286 /* Same as inet6_dgram_ops, sans udp_poll.  */
1287 static const struct proto_ops inet6_sockraw_ops = {
1288         .family            = PF_INET6,
1289         .owner             = THIS_MODULE,
1290         .release           = inet6_release,
1291         .bind              = inet6_bind,
1292         .connect           = inet_dgram_connect,        /* ok           */
1293         .socketpair        = sock_no_socketpair,        /* a do nothing */
1294         .accept            = sock_no_accept,            /* a do nothing */
1295         .getname           = inet6_getname,
1296         .poll              = datagram_poll,             /* ok           */
1297         .ioctl             = inet6_ioctl,               /* must change  */
1298         .listen            = sock_no_listen,            /* ok           */
1299         .shutdown          = inet_shutdown,             /* ok           */
1300         .setsockopt        = sock_common_setsockopt,    /* ok           */
1301         .getsockopt        = sock_common_getsockopt,    /* ok           */
1302         .sendmsg           = inet_sendmsg,              /* ok           */
1303         .recvmsg           = sock_common_recvmsg,       /* ok           */
1304         .mmap              = sock_no_mmap,
1305         .sendpage          = sock_no_sendpage,
1306 #ifdef CONFIG_COMPAT
1307         .compat_setsockopt = compat_sock_common_setsockopt,
1308         .compat_getsockopt = compat_sock_common_getsockopt,
1309 #endif
1310 };
1311
1312 static struct inet_protosw rawv6_protosw = {
1313         .type           = SOCK_RAW,
1314         .protocol       = IPPROTO_IP,   /* wild card */
1315         .prot           = &rawv6_prot,
1316         .ops            = &inet6_sockraw_ops,
1317         .capability     = CAP_NET_RAW,
1318         .no_check       = UDP_CSUM_DEFAULT,
1319         .flags          = INET_PROTOSW_REUSE,
1320 };
1321
1322 int __init rawv6_init(void)
1323 {
1324         int ret;
1325
1326         ret = inet6_register_protosw(&rawv6_protosw);
1327         if (ret)
1328                 goto out;
1329 out:
1330         return ret;
1331 }
1332
1333 void rawv6_exit(void)
1334 {
1335         inet6_unregister_protosw(&rawv6_protosw);
1336 }