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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  *      Fixes:
  11  *      Hideaki YOSHIFUJI       :       sin6_scope_id support
  12  *      YOSHIFUJI,H.@USAGI      :       raw checksum (RFC2292(bis) compliance)
  13  *      Kazunori MIYAZAWA @USAGI:       change process style to use ip6_append_data
  14  *
  15  *      This program is free software; you can redistribute it and/or
  16  *      modify it under the terms of the GNU General Public License
  17  *      as published by the Free Software Foundation; either version
  18  *      2 of the License, or (at your option) any later version.
  19  */
  20
  21 #include <linux/errno.h>
  22 #include <linux/types.h>
  23 #include <linux/socket.h>
  24 #include <linux/slab.h>
  25 #include <linux/sockios.h>
  26 #include <linux/net.h>
  27 #include <linux/in6.h>
  28 #include <linux/netdevice.h>
  29 #include <linux/if_arp.h>
  30 #include <linux/icmpv6.h>
  31 #include <linux/netfilter.h>
  32 #include <linux/netfilter_ipv6.h>
  33 #include <linux/skbuff.h>
  34 #include <asm/uaccess.h>
  35 #include <asm/ioctls.h>
  36
  37 #include <net/net_namespace.h>
  38 #include <net/ip.h>
  39 #include <net/sock.h>
  40 #include <net/snmp.h>
  41
  42 #include <net/ipv6.h>
  43 #include <net/ndisc.h>
  44 #include <net/protocol.h>
  45 #include <net/ip6_route.h>
  46 #include <net/ip6_checksum.h>
  47 #include <net/addrconf.h>
  48 #include <net/transp_v6.h>
  49 #include <net/udp.h>
  50 #include <net/inet_common.h>
  51 #include <net/tcp_states.h>
  52 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
  53 #include <net/mip6.h>
  54 #endif
  55 #include <linux/mroute6.h>
  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)->inet_num == num) {
  77                         struct ipv6_pinfo *np = inet6_sk(sk);
  78
  79                         if (!net_eq(sock_net(sk), 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         if (sk == NULL)
 172                 goto out;
 173
 174         net = dev_net(skb->dev);
 175         sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
 176
 177         while (sk) {
 178                 int filtered;
 179
 180                 delivered = 1;
 181                 switch (nexthdr) {
 182                 case IPPROTO_ICMPV6:
 183                         filtered = icmpv6_filter(sk, skb);
 184                         break;
 185
 186 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 187                 case IPPROTO_MH:
 188                 {
 189                         /* XXX: To validate MH only once for each packet,
 190                          * this is placed here. It should be after checking
 191                          * xfrm policy, however it doesn't. The checking xfrm
 192                          * policy is placed in rawv6_rcv() because it is
 193                          * required for each socket.
 194                          */
 195                         int (*filter)(struct sock *sock, struct sk_buff *skb);
 196
 197                         filter = rcu_dereference(mh_filter);
 198                         filtered = filter ? filter(sk, skb) : 0;
 199                         break;
 200                 }
 201 #endif
 202                 default:
 203                         filtered = 0;
 204                         break;
 205                 }
 206
 207                 if (filtered < 0)
 208                         break;
 209                 if (filtered == 0) {
 210                         struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
 211
 212                         /* Not releasing hash table! */
 213                         if (clone) {
 214                                 nf_reset(clone);
 215                                 rawv6_rcv(sk, clone);
 216                         }
 217                 }
 218                 sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
 219                                      IP6CB(skb)->iif);
 220         }
 221 out:
 222         read_unlock(&raw_v6_hashinfo.lock);
 223         return delivered;
 224 }
 225
 226 int raw6_local_deliver(struct sk_buff *skb, int nexthdr)
 227 {
 228         struct sock *raw_sk;
 229
 230         raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]);
 231         if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
 232                 raw_sk = NULL;
 233
 234         return raw_sk != NULL;
 235 }
 236
 237 /* This cleans up af_inet6 a bit. -DaveM */
 238 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 239 {
 240         struct inet_sock *inet = inet_sk(sk);
 241         struct ipv6_pinfo *np = inet6_sk(sk);
 242         struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
 243         __be32 v4addr = 0;
 244         int addr_type;
 245         int err;
 246
 247         if (addr_len < SIN6_LEN_RFC2133)
 248                 return -EINVAL;
 249         addr_type = ipv6_addr_type(&addr->sin6_addr);
 250
 251         /* Raw sockets are IPv6 only */
 252         if (addr_type == IPV6_ADDR_MAPPED)
 253                 return -EADDRNOTAVAIL;
 254
 255         lock_sock(sk);
 256
 257         err = -EINVAL;
 258         if (sk->sk_state != TCP_CLOSE)
 259                 goto out;
 260
 261         rcu_read_lock();
 262         /* Check if the address belongs to the host. */
 263         if (addr_type != IPV6_ADDR_ANY) {
 264                 struct net_device *dev = NULL;
 265
 266                 if (addr_type & IPV6_ADDR_LINKLOCAL) {
 267                         if (addr_len >= sizeof(struct sockaddr_in6) &&
 268                             addr->sin6_scope_id) {
 269                                 /* Override any existing binding, if another
 270                                  * one is supplied by user.
 271                                  */
 272                                 sk->sk_bound_dev_if = addr->sin6_scope_id;
 273                         }
 274
 275                         /* Binding to link-local address requires an interface */
 276                         if (!sk->sk_bound_dev_if)
 277                                 goto out_unlock;
 278
 279                         err = -ENODEV;
 280                         dev = dev_get_by_index_rcu(sock_net(sk),
 281                                                    sk->sk_bound_dev_if);
 282                         if (!dev)
 283                                 goto out_unlock;
 284                 }
 285
 286                 /* ipv4 addr of the socket is invalid.  Only the
 287                  * unspecified and mapped address have a v4 equivalent.
 288                  */
 289                 v4addr = LOOPBACK4_IPV6;
 290                 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
 291                         err = -EADDRNOTAVAIL;
 292                         if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
 293                                            dev, 0)) {
 294                                 goto out_unlock;
 295                         }
 296                 }
 297         }
 298
 299         inet->inet_rcv_saddr = inet->inet_saddr = v4addr;
 300         ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
 301         if (!(addr_type & IPV6_ADDR_MULTICAST))
 302                 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
 303         err = 0;
 304 out_unlock:
 305         rcu_read_unlock();
 306 out:
 307         release_sock(sk);
 308         return err;
 309 }
 310
 311 static void rawv6_err(struct sock *sk, struct sk_buff *skb,
 312                struct inet6_skb_parm *opt,
 313                u8 type, u8 code, int offset, __be32 info)
 314 {
 315         struct inet_sock *inet = inet_sk(sk);
 316         struct ipv6_pinfo *np = inet6_sk(sk);
 317         int err;
 318         int harderr;
 319
 320         /* Report error on raw socket, if:
 321            1. User requested recverr.
 322            2. Socket is connected (otherwise the error indication
 323               is useless without recverr and error is hard.
 324          */
 325         if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
 326                 return;
 327
 328         harderr = icmpv6_err_convert(type, code, &err);
 329         if (type == ICMPV6_PKT_TOOBIG)
 330                 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
 331
 332         if (np->recverr) {
 333                 u8 *payload = skb->data;
 334                 if (!inet->hdrincl)
 335                         payload += offset;
 336                 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
 337         }
 338
 339         if (np->recverr || harderr) {
 340                 sk->sk_err = err;
 341                 sk->sk_error_report(sk);
 342         }
 343 }
 344
 345 void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
 346                 u8 type, u8 code, int inner_offset, __be32 info)
 347 {
 348         struct sock *sk;
 349         int hash;
 350         struct in6_addr *saddr, *daddr;
 351         struct net *net;
 352
 353         hash = nexthdr & (RAW_HTABLE_SIZE - 1);
 354
 355         read_lock(&raw_v6_hashinfo.lock);
 356         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 357         if (sk != NULL) {
 358                 /* Note: ipv6_hdr(skb) != skb->data */
 359                 struct ipv6hdr *ip6h = (struct ipv6hdr *)skb->data;
 360                 saddr = &ip6h->saddr;
 361                 daddr = &ip6h->daddr;
 362                 net = dev_net(skb->dev);
 363
 364                 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
 365                                                 IP6CB(skb)->iif))) {
 366                         rawv6_err(sk, skb, NULL, type, code,
 367                                         inner_offset, info);
 368                         sk = sk_next(sk);
 369                 }
 370         }
 371         read_unlock(&raw_v6_hashinfo.lock);
 372 }
 373
 374 static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
 375 {
 376         if ((raw6_sk(sk)->checksum || sk->sk_filter) &&
 377             skb_checksum_complete(skb)) {
 378                 atomic_inc(&sk->sk_drops);
 379                 kfree_skb(skb);
 380                 return NET_RX_DROP;
 381         }
 382
 383         /* Charge it to the socket. */
 384         if (sock_queue_rcv_skb(sk, skb) < 0) {
 385                 kfree_skb(skb);
 386                 return NET_RX_DROP;
 387         }
 388
 389         return 0;
 390 }
 391
 392 /*
 393  *      This is next to useless...
 394  *      if we demultiplex in network layer we don't need the extra call
 395  *      just to queue the skb...
 396  *      maybe we could have the network decide upon a hint if it
 397  *      should call raw_rcv for demultiplexing
 398  */
 399 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
 400 {
 401         struct inet_sock *inet = inet_sk(sk);
 402         struct raw6_sock *rp = raw6_sk(sk);
 403
 404         if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
 405                 atomic_inc(&sk->sk_drops);
 406                 kfree_skb(skb);
 407                 return NET_RX_DROP;
 408         }
 409
 410         if (!rp->checksum)
 411                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 412
 413         if (skb->ip_summed == CHECKSUM_COMPLETE) {
 414                 skb_postpull_rcsum(skb, skb_network_header(skb),
 415                                    skb_network_header_len(skb));
 416                 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 417                                      &ipv6_hdr(skb)->daddr,
 418                                      skb->len, inet->inet_num, skb->csum))
 419                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 420         }
 421         if (!skb_csum_unnecessary(skb))
 422                 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 423                                                          &ipv6_hdr(skb)->daddr,
 424                                                          skb->len,
 425                                                          inet->inet_num, 0));
 426
 427         if (inet->hdrincl) {
 428                 if (skb_checksum_complete(skb)) {
 429                         atomic_inc(&sk->sk_drops);
 430                         kfree_skb(skb);
 431                         return NET_RX_DROP;
 432                 }
 433         }
 434
 435         rawv6_rcv_skb(sk, skb);
 436         return 0;
 437 }
 438
 439
 440 /*
 441  *      This should be easy, if there is something there
 442  *      we return it, otherwise we block.
 443  */
 444
 445 static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
 446                   struct msghdr *msg, size_t len,
 447                   int noblock, int flags, int *addr_len)
 448 {
 449         struct ipv6_pinfo *np = inet6_sk(sk);
 450         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
 451         struct sk_buff *skb;
 452         size_t copied;
 453         int err;
 454
 455         if (flags & MSG_OOB)
 456                 return -EOPNOTSUPP;
 457
 458         if (addr_len)
 459                 *addr_len=sizeof(*sin6);
 460
 461         if (flags & MSG_ERRQUEUE)
 462                 return ipv6_recv_error(sk, msg, len);
 463
 464         skb = skb_recv_datagram(sk, flags, noblock, &err);
 465         if (!skb)
 466                 goto out;
 467
 468         copied = skb->len;
 469         if (copied > len) {
 470                 copied = len;
 471                 msg->msg_flags |= MSG_TRUNC;
 472         }
 473
 474         if (skb_csum_unnecessary(skb)) {
 475                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 476         } else if (msg->msg_flags&MSG_TRUNC) {
 477                 if (__skb_checksum_complete(skb))
 478                         goto csum_copy_err;
 479                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 480         } else {
 481                 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
 482                 if (err == -EINVAL)
 483                         goto csum_copy_err;
 484         }
 485         if (err)
 486                 goto out_free;
 487
 488         /* Copy the address. */
 489         if (sin6) {
 490                 sin6->sin6_family = AF_INET6;
 491                 sin6->sin6_port = 0;
 492                 ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr);
 493                 sin6->sin6_flowinfo = 0;
 494                 sin6->sin6_scope_id = 0;
 495                 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
 496                         sin6->sin6_scope_id = IP6CB(skb)->iif;
 497         }
 498
 499         sock_recv_ts_and_drops(msg, sk, skb);
 500
 501         if (np->rxopt.all)
 502                 datagram_recv_ctl(sk, msg, skb);
 503
 504         err = copied;
 505         if (flags & MSG_TRUNC)
 506                 err = skb->len;
 507
 508 out_free:
 509         skb_free_datagram(sk, skb);
 510 out:
 511         return err;
 512
 513 csum_copy_err:
 514         skb_kill_datagram(sk, skb, flags);
 515
 516         /* Error for blocking case is chosen to masquerade
 517            as some normal condition.
 518          */
 519         err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
 520         goto out;
 521 }
 522
 523 static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
 524                                      struct raw6_sock *rp)
 525 {
 526         struct sk_buff *skb;
 527         int err = 0;
 528         int offset;
 529         int len;
 530         int total_len;
 531         __wsum tmp_csum;
 532         __sum16 csum;
 533
 534         if (!rp->checksum)
 535                 goto send;
 536
 537         if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
 538                 goto out;
 539
 540         offset = rp->offset;
 541         total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) -
 542                                                 skb->data);
 543         if (offset >= total_len - 1) {
 544                 err = -EINVAL;
 545                 ip6_flush_pending_frames(sk);
 546                 goto out;
 547         }
 548
 549         /* should be check HW csum miyazawa */
 550         if (skb_queue_len(&sk->sk_write_queue) == 1) {
 551                 /*
 552                  * Only one fragment on the socket.
 553                  */
 554                 tmp_csum = skb->csum;
 555         } else {
 556                 struct sk_buff *csum_skb = NULL;
 557                 tmp_csum = 0;
 558
 559                 skb_queue_walk(&sk->sk_write_queue, skb) {
 560                         tmp_csum = csum_add(tmp_csum, skb->csum);
 561
 562                         if (csum_skb)
 563                                 continue;
 564
 565                         len = skb->len - skb_transport_offset(skb);
 566                         if (offset >= len) {
 567                                 offset -= len;
 568                                 continue;
 569                         }
 570
 571                         csum_skb = skb;
 572                 }
 573
 574                 skb = csum_skb;
 575         }
 576
 577         offset += skb_transport_offset(skb);
 578         if (skb_copy_bits(skb, offset, &csum, 2))
 579                 BUG();
 580
 581         /* in case cksum was not initialized */
 582         if (unlikely(csum))
 583                 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
 584
 585         csum = csum_ipv6_magic(&fl->fl6_src,
 586                                    &fl->fl6_dst,
 587                                    total_len, fl->proto, tmp_csum);
 588
 589         if (csum == 0 && fl->proto == IPPROTO_UDP)
 590                 csum = CSUM_MANGLED_0;
 591
 592         if (skb_store_bits(skb, offset, &csum, 2))
 593                 BUG();
 594
 595 send:
 596         err = ip6_push_pending_frames(sk);
 597 out:
 598         return err;
 599 }
 600
 601 static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
 602                         struct flowi *fl, struct rt6_info *rt,
 603                         unsigned int flags)
 604 {
 605         struct ipv6_pinfo *np = inet6_sk(sk);
 606         struct ipv6hdr *iph;
 607         struct sk_buff *skb;
 608         int err;
 609
 610         if (length > rt->u.dst.dev->mtu) {
 611                 ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
 612                 return -EMSGSIZE;
 613         }
 614         if (flags&MSG_PROBE)
 615                 goto out;
 616
 617         skb = sock_alloc_send_skb(sk,
 618                                   length + LL_ALLOCATED_SPACE(rt->u.dst.dev) + 15,
 619                                   flags & MSG_DONTWAIT, &err);
 620         if (skb == NULL)
 621                 goto error;
 622         skb_reserve(skb, LL_RESERVED_SPACE(rt->u.dst.dev));
 623
 624         skb->priority = sk->sk_priority;
 625         skb->mark = sk->sk_mark;
 626         skb_dst_set(skb, dst_clone(&rt->u.dst));
 627
 628         skb_put(skb, length);
 629         skb_reset_network_header(skb);
 630         iph = ipv6_hdr(skb);
 631
 632         skb->ip_summed = CHECKSUM_NONE;
 633
 634         skb->transport_header = skb->network_header;
 635         err = memcpy_fromiovecend((void *)iph, from, 0, length);
 636         if (err)
 637                 goto error_fault;
 638
 639         IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
 640         err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
 641                       dst_output);
 642         if (err > 0)
 643                 err = net_xmit_errno(err);
 644         if (err)
 645                 goto error;
 646 out:
 647         return 0;
 648
 649 error_fault:
 650         err = -EFAULT;
 651         kfree_skb(skb);
 652 error:
 653         IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
 654         if (err == -ENOBUFS && !np->recverr)
 655                 err = 0;
 656         return err;
 657 }
 658
 659 static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
 660 {
 661         struct iovec *iov;
 662         u8 __user *type = NULL;
 663         u8 __user *code = NULL;
 664         u8 len = 0;
 665         int probed = 0;
 666         int i;
 667
 668         if (!msg->msg_iov)
 669                 return 0;
 670
 671         for (i = 0; i < msg->msg_iovlen; i++) {
 672                 iov = &msg->msg_iov[i];
 673                 if (!iov)
 674                         continue;
 675
 676                 switch (fl->proto) {
 677                 case IPPROTO_ICMPV6:
 678                         /* check if one-byte field is readable or not. */
 679                         if (iov->iov_base && iov->iov_len < 1)
 680                                 break;
 681
 682                         if (!type) {
 683                                 type = iov->iov_base;
 684                                 /* check if code field is readable or not. */
 685                                 if (iov->iov_len > 1)
 686                                         code = type + 1;
 687                         } else if (!code)
 688                                 code = iov->iov_base;
 689
 690                         if (type && code) {
 691                                 if (get_user(fl->fl_icmp_type, type) ||
 692                                     get_user(fl->fl_icmp_code, code))
 693                                         return -EFAULT;
 694                                 probed = 1;
 695                         }
 696                         break;
 697                 case IPPROTO_MH:
 698                         if (iov->iov_base && iov->iov_len < 1)
 699                                 break;
 700                         /* check if type field is readable or not. */
 701                         if (iov->iov_len > 2 - len) {
 702                                 u8 __user *p = iov->iov_base;
 703                                 if (get_user(fl->fl_mh_type, &p[2 - len]))
 704                                         return -EFAULT;
 705                                 probed = 1;
 706                         } else
 707                                 len += iov->iov_len;
 708
 709                         break;
 710                 default:
 711                         probed = 1;
 712                         break;
 713                 }
 714                 if (probed)
 715                         break;
 716         }
 717         return 0;
 718 }
 719
 720 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
 721                    struct msghdr *msg, size_t len)
 722 {
 723         struct ipv6_txoptions opt_space;
 724         struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
 725         struct in6_addr *daddr, *final_p = NULL, final;
 726         struct inet_sock *inet = inet_sk(sk);
 727         struct ipv6_pinfo *np = inet6_sk(sk);
 728         struct raw6_sock *rp = raw6_sk(sk);
 729         struct ipv6_txoptions *opt = NULL;
 730         struct ip6_flowlabel *flowlabel = NULL;
 731         struct dst_entry *dst = NULL;
 732         struct flowi fl;
 733         int addr_len = msg->msg_namelen;
 734         int hlimit = -1;
 735         int tclass = -1;
 736         int dontfrag = -1;
 737         u16 proto;
 738         int err;
 739
 740         /* Rough check on arithmetic overflow,
 741            better check is made in ip6_append_data().
 742          */
 743         if (len > INT_MAX)
 744                 return -EMSGSIZE;
 745
 746         /* Mirror BSD error message compatibility */
 747         if (msg->msg_flags & MSG_OOB)
 748                 return -EOPNOTSUPP;
 749
 750         /*
 751          *      Get and verify the address.
 752          */
 753         memset(&fl, 0, sizeof(fl));
 754
 755         fl.mark = sk->sk_mark;
 756
 757         if (sin6) {
 758                 if (addr_len < SIN6_LEN_RFC2133)
 759                         return -EINVAL;
 760
 761                 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
 762                         return(-EAFNOSUPPORT);
 763
 764                 /* port is the proto value [0..255] carried in nexthdr */
 765                 proto = ntohs(sin6->sin6_port);
 766
 767                 if (!proto)
 768                         proto = inet->inet_num;
 769                 else if (proto != inet->inet_num)
 770                         return(-EINVAL);
 771
 772                 if (proto > 255)
 773                         return(-EINVAL);
 774
 775                 daddr = &sin6->sin6_addr;
 776                 if (np->sndflow) {
 777                         fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
 778                         if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
 779                                 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
 780                                 if (flowlabel == NULL)
 781                                         return -EINVAL;
 782                                 daddr = &flowlabel->dst;
 783                         }
 784                 }
 785
 786                 /*
 787                  * Otherwise it will be difficult to maintain
 788                  * sk->sk_dst_cache.
 789                  */
 790                 if (sk->sk_state == TCP_ESTABLISHED &&
 791                     ipv6_addr_equal(daddr, &np->daddr))
 792                         daddr = &np->daddr;
 793
 794                 if (addr_len >= sizeof(struct sockaddr_in6) &&
 795                     sin6->sin6_scope_id &&
 796                     ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
 797                         fl.oif = sin6->sin6_scope_id;
 798         } else {
 799                 if (sk->sk_state != TCP_ESTABLISHED)
 800                         return -EDESTADDRREQ;
 801
 802                 proto = inet->inet_num;
 803                 daddr = &np->daddr;
 804                 fl.fl6_flowlabel = np->flow_label;
 805         }
 806
 807         if (fl.oif == 0)
 808                 fl.oif = sk->sk_bound_dev_if;
 809
 810         if (msg->msg_controllen) {
 811                 opt = &opt_space;
 812                 memset(opt, 0, sizeof(struct ipv6_txoptions));
 813                 opt->tot_len = sizeof(struct ipv6_txoptions);
 814
 815                 err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit,
 816                                         &tclass, &dontfrag);
 817                 if (err < 0) {
 818                         fl6_sock_release(flowlabel);
 819                         return err;
 820                 }
 821                 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
 822                         flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
 823                         if (flowlabel == NULL)
 824                                 return -EINVAL;
 825                 }
 826                 if (!(opt->opt_nflen|opt->opt_flen))
 827                         opt = NULL;
 828         }
 829         if (opt == NULL)
 830                 opt = np->opt;
 831         if (flowlabel)
 832                 opt = fl6_merge_options(&opt_space, flowlabel, opt);
 833         opt = ipv6_fixup_options(&opt_space, opt);
 834
 835         fl.proto = proto;
 836         err = rawv6_probe_proto_opt(&fl, msg);
 837         if (err)
 838                 goto out;
 839
 840         if (!ipv6_addr_any(daddr))
 841                 ipv6_addr_copy(&fl.fl6_dst, daddr);
 842         else
 843                 fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
 844         if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
 845                 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
 846
 847         /* merge ip6_build_xmit from ip6_output */
 848         if (opt && opt->srcrt) {
 849                 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
 850                 ipv6_addr_copy(&final, &fl.fl6_dst);
 851                 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
 852                 final_p = &final;
 853         }
 854
 855         if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
 856                 fl.oif = np->mcast_oif;
 857         security_sk_classify_flow(sk, &fl);
 858
 859         err = ip6_dst_lookup(sk, &dst, &fl);
 860         if (err)
 861                 goto out;
 862         if (final_p)
 863                 ipv6_addr_copy(&fl.fl6_dst, final_p);
 864
 865         err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT);
 866         if (err < 0) {
 867                 if (err == -EREMOTE)
 868                         err = ip6_dst_blackhole(sk, &dst, &fl);
 869                 if (err < 0)
 870                         goto out;
 871         }
 872
 873         if (hlimit < 0) {
 874                 if (ipv6_addr_is_multicast(&fl.fl6_dst))
 875                         hlimit = np->mcast_hops;
 876                 else
 877                         hlimit = np->hop_limit;
 878                 if (hlimit < 0)
 879                         hlimit = ip6_dst_hoplimit(dst);
 880         }
 881
 882         if (tclass < 0)
 883                 tclass = np->tclass;
 884
 885         if (dontfrag < 0)
 886                 dontfrag = np->dontfrag;
 887
 888         if (msg->msg_flags&MSG_CONFIRM)
 889                 goto do_confirm;
 890
 891 back_from_confirm:
 892         if (inet->hdrincl) {
 893                 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
 894         } else {
 895                 lock_sock(sk);
 896                 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
 897                         len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
 898                         msg->msg_flags, dontfrag);
 899
 900                 if (err)
 901                         ip6_flush_pending_frames(sk);
 902                 else if (!(msg->msg_flags & MSG_MORE))
 903                         err = rawv6_push_pending_frames(sk, &fl, rp);
 904                 release_sock(sk);
 905         }
 906 done:
 907         dst_release(dst);
 908 out:
 909         fl6_sock_release(flowlabel);
 910         return err<0?err:len;
 911 do_confirm:
 912         dst_confirm(dst);
 913         if (!(msg->msg_flags & MSG_PROBE) || len)
 914                 goto back_from_confirm;
 915         err = 0;
 916         goto done;
 917 }
 918
 919 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
 920                                char __user *optval, int optlen)
 921 {
 922         switch (optname) {
 923         case ICMPV6_FILTER:
 924                 if (optlen > sizeof(struct icmp6_filter))
 925                         optlen = sizeof(struct icmp6_filter);
 926                 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
 927                         return -EFAULT;
 928                 return 0;
 929         default:
 930                 return -ENOPROTOOPT;
 931         }
 932
 933         return 0;
 934 }
 935
 936 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
 937                                char __user *optval, int __user *optlen)
 938 {
 939         int len;
 940
 941         switch (optname) {
 942         case ICMPV6_FILTER:
 943                 if (get_user(len, optlen))
 944                         return -EFAULT;
 945                 if (len < 0)
 946                         return -EINVAL;
 947                 if (len > sizeof(struct icmp6_filter))
 948                         len = sizeof(struct icmp6_filter);
 949                 if (put_user(len, optlen))
 950                         return -EFAULT;
 951                 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
 952                         return -EFAULT;
 953                 return 0;
 954         default:
 955                 return -ENOPROTOOPT;
 956         }
 957
 958         return 0;
 959 }
 960
 961
 962 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
 963                             char __user *optval, unsigned int optlen)
 964 {
 965         struct raw6_sock *rp = raw6_sk(sk);
 966         int val;
 967
 968         if (get_user(val, (int __user *)optval))
 969                 return -EFAULT;
 970
 971         switch (optname) {
 972                 case IPV6_CHECKSUM:
 973                         if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
 974                             level == IPPROTO_IPV6) {
 975                                 /*
 976                                  * RFC3542 tells that IPV6_CHECKSUM socket
 977                                  * option in the IPPROTO_IPV6 level is not
 978                                  * allowed on ICMPv6 sockets.
 979                                  * If you want to set it, use IPPROTO_RAW
 980                                  * level IPV6_CHECKSUM socket option
 981                                  * (Linux extension).
 982                                  */
 983                                 return -EINVAL;
 984                         }
 985
 986                         /* You may get strange result with a positive odd offset;
 987                            RFC2292bis agrees with me. */
 988                         if (val > 0 && (val&1))
 989                                 return(-EINVAL);
 990                         if (val < 0) {
 991                                 rp->checksum = 0;
 992                         } else {
 993                                 rp->checksum = 1;
 994                                 rp->offset = val;
 995                         }
 996
 997                         return 0;
 998                         break;
 999
1000                 default:
1001                         return(-ENOPROTOOPT);
1002         }
1003 }
1004
1005 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1006                           char __user *optval, unsigned int optlen)
1007 {
1008         switch(level) {
1009                 case SOL_RAW:
1010                         break;
1011
1012                 case SOL_ICMPV6:
1013                         if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1014                                 return -EOPNOTSUPP;
1015                         return rawv6_seticmpfilter(sk, level, optname, optval,
1016                                                    optlen);
1017                 case SOL_IPV6:
1018                         if (optname == IPV6_CHECKSUM)
1019                                 break;
1020                 default:
1021                         return ipv6_setsockopt(sk, level, optname, optval,
1022                                                optlen);
1023         }
1024
1025         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1026 }
1027
1028 #ifdef CONFIG_COMPAT
1029 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1030                                    char __user *optval, unsigned int optlen)
1031 {
1032         switch (level) {
1033         case SOL_RAW:
1034                 break;
1035         case SOL_ICMPV6:
1036                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1037                         return -EOPNOTSUPP;
1038                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1039         case SOL_IPV6:
1040                 if (optname == IPV6_CHECKSUM)
1041                         break;
1042         default:
1043                 return compat_ipv6_setsockopt(sk, level, optname,
1044                                               optval, optlen);
1045         }
1046         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1047 }
1048 #endif
1049
1050 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1051                             char __user *optval, int __user *optlen)
1052 {
1053         struct raw6_sock *rp = raw6_sk(sk);
1054         int val, len;
1055
1056         if (get_user(len,optlen))
1057                 return -EFAULT;
1058
1059         switch (optname) {
1060         case IPV6_CHECKSUM:
1061                 /*
1062                  * We allow getsockopt() for IPPROTO_IPV6-level
1063                  * IPV6_CHECKSUM socket option on ICMPv6 sockets
1064                  * since RFC3542 is silent about it.
1065                  */
1066                 if (rp->checksum == 0)
1067                         val = -1;
1068                 else
1069                         val = rp->offset;
1070                 break;
1071
1072         default:
1073                 return -ENOPROTOOPT;
1074         }
1075
1076         len = min_t(unsigned int, sizeof(int), len);
1077
1078         if (put_user(len, optlen))
1079                 return -EFAULT;
1080         if (copy_to_user(optval,&val,len))
1081                 return -EFAULT;
1082         return 0;
1083 }
1084
1085 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1086                           char __user *optval, int __user *optlen)
1087 {
1088         switch(level) {
1089                 case SOL_RAW:
1090                         break;
1091
1092                 case SOL_ICMPV6:
1093                         if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1094                                 return -EOPNOTSUPP;
1095                         return rawv6_geticmpfilter(sk, level, optname, optval,
1096                                                    optlen);
1097                 case SOL_IPV6:
1098                         if (optname == IPV6_CHECKSUM)
1099                                 break;
1100                 default:
1101                         return ipv6_getsockopt(sk, level, optname, optval,
1102                                                optlen);
1103         }
1104
1105         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1106 }
1107
1108 #ifdef CONFIG_COMPAT
1109 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1110                                    char __user *optval, int __user *optlen)
1111 {
1112         switch (level) {
1113         case SOL_RAW:
1114                 break;
1115         case SOL_ICMPV6:
1116                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1117                         return -EOPNOTSUPP;
1118                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1119         case SOL_IPV6:
1120                 if (optname == IPV6_CHECKSUM)
1121                         break;
1122         default:
1123                 return compat_ipv6_getsockopt(sk, level, optname,
1124                                               optval, optlen);
1125         }
1126         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1127 }
1128 #endif
1129
1130 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1131 {
1132         switch(cmd) {
1133                 case SIOCOUTQ:
1134                 {
1135                         int amount = sk_wmem_alloc_get(sk);
1136
1137                         return put_user(amount, (int __user *)arg);
1138                 }
1139                 case SIOCINQ:
1140                 {
1141                         struct sk_buff *skb;
1142                         int amount = 0;
1143
1144                         spin_lock_bh(&sk->sk_receive_queue.lock);
1145                         skb = skb_peek(&sk->sk_receive_queue);
1146                         if (skb != NULL)
1147                                 amount = skb->tail - skb->transport_header;
1148                         spin_unlock_bh(&sk->sk_receive_queue.lock);
1149                         return put_user(amount, (int __user *)arg);
1150                 }
1151
1152                 default:
1153 #ifdef CONFIG_IPV6_MROUTE
1154                         return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1155 #else
1156                         return -ENOIOCTLCMD;
1157 #endif
1158         }
1159 }
1160
1161 static void rawv6_close(struct sock *sk, long timeout)
1162 {
1163         if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1164                 ip6_ra_control(sk, -1);
1165         ip6mr_sk_done(sk);
1166         sk_common_release(sk);
1167 }
1168
1169 static void raw6_destroy(struct sock *sk)
1170 {
1171         lock_sock(sk);
1172         ip6_flush_pending_frames(sk);
1173         release_sock(sk);
1174
1175         inet6_destroy_sock(sk);
1176 }
1177
1178 static int rawv6_init_sk(struct sock *sk)
1179 {
1180         struct raw6_sock *rp = raw6_sk(sk);
1181
1182         switch (inet_sk(sk)->inet_num) {
1183         case IPPROTO_ICMPV6:
1184                 rp->checksum = 1;
1185                 rp->offset   = 2;
1186                 break;
1187         case IPPROTO_MH:
1188                 rp->checksum = 1;
1189                 rp->offset   = 4;
1190                 break;
1191         default:
1192                 break;
1193         }
1194         return(0);
1195 }
1196
1197 struct proto rawv6_prot = {
1198         .name              = "RAWv6",
1199         .owner             = THIS_MODULE,
1200         .close             = rawv6_close,
1201         .destroy           = raw6_destroy,
1202         .connect           = ip6_datagram_connect,
1203         .disconnect        = udp_disconnect,
1204         .ioctl             = rawv6_ioctl,
1205         .init              = rawv6_init_sk,
1206         .setsockopt        = rawv6_setsockopt,
1207         .getsockopt        = rawv6_getsockopt,
1208         .sendmsg           = rawv6_sendmsg,
1209         .recvmsg           = rawv6_recvmsg,
1210         .bind              = rawv6_bind,
1211         .backlog_rcv       = rawv6_rcv_skb,
1212         .hash              = raw_hash_sk,
1213         .unhash            = raw_unhash_sk,
1214         .obj_size          = sizeof(struct raw6_sock),
1215         .h.raw_hash        = &raw_v6_hashinfo,
1216 #ifdef CONFIG_COMPAT
1217         .compat_setsockopt = compat_rawv6_setsockopt,
1218         .compat_getsockopt = compat_rawv6_getsockopt,
1219 #endif
1220 };
1221
1222 #ifdef CONFIG_PROC_FS
1223 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1224 {
1225         struct ipv6_pinfo *np = inet6_sk(sp);
1226         struct in6_addr *dest, *src;
1227         __u16 destp, srcp;
1228
1229         dest  = &np->daddr;
1230         src   = &np->rcv_saddr;
1231         destp = 0;
1232         srcp  = inet_sk(sp)->inet_num;
1233         seq_printf(seq,
1234                    "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1235                    "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
1236                    i,
1237                    src->s6_addr32[0], src->s6_addr32[1],
1238                    src->s6_addr32[2], src->s6_addr32[3], srcp,
1239                    dest->s6_addr32[0], dest->s6_addr32[1],
1240                    dest->s6_addr32[2], dest->s6_addr32[3], destp,
1241                    sp->sk_state,
1242                    sk_wmem_alloc_get(sp),
1243                    sk_rmem_alloc_get(sp),
1244                    0, 0L, 0,
1245                    sock_i_uid(sp), 0,
1246                    sock_i_ino(sp),
1247                    atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1248 }
1249
1250 static int raw6_seq_show(struct seq_file *seq, void *v)
1251 {
1252         if (v == SEQ_START_TOKEN)
1253                 seq_printf(seq,
1254                            "  sl  "
1255                            "local_address                         "
1256                            "remote_address                        "
1257                            "st tx_queue rx_queue tr tm->when retrnsmt"
1258                            "   uid  timeout inode ref pointer drops\n");
1259         else
1260                 raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1261         return 0;
1262 }
1263
1264 static const struct seq_operations raw6_seq_ops = {
1265         .start =        raw_seq_start,
1266         .next =         raw_seq_next,
1267         .stop =         raw_seq_stop,
1268         .show =         raw6_seq_show,
1269 };
1270
1271 static int raw6_seq_open(struct inode *inode, struct file *file)
1272 {
1273         return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1274 }
1275
1276 static const struct file_operations raw6_seq_fops = {
1277         .owner =        THIS_MODULE,
1278         .open =         raw6_seq_open,
1279         .read =         seq_read,
1280         .llseek =       seq_lseek,
1281         .release =      seq_release_net,
1282 };
1283
1284 static int __net_init raw6_init_net(struct net *net)
1285 {
1286         if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops))
1287                 return -ENOMEM;
1288
1289         return 0;
1290 }
1291
1292 static void __net_exit raw6_exit_net(struct net *net)
1293 {
1294         proc_net_remove(net, "raw6");
1295 }
1296
1297 static struct pernet_operations raw6_net_ops = {
1298         .init = raw6_init_net,
1299         .exit = raw6_exit_net,
1300 };
1301
1302 int __init raw6_proc_init(void)
1303 {
1304         return register_pernet_subsys(&raw6_net_ops);
1305 }
1306
1307 void raw6_proc_exit(void)
1308 {
1309         unregister_pernet_subsys(&raw6_net_ops);
1310 }
1311 #endif  /* CONFIG_PROC_FS */
1312
1313 /* Same as inet6_dgram_ops, sans udp_poll.  */
1314 static const struct proto_ops inet6_sockraw_ops = {
1315         .family            = PF_INET6,
1316         .owner             = THIS_MODULE,
1317         .release           = inet6_release,
1318         .bind              = inet6_bind,
1319         .connect           = inet_dgram_connect,        /* ok           */
1320         .socketpair        = sock_no_socketpair,        /* a do nothing */
1321         .accept            = sock_no_accept,            /* a do nothing */
1322         .getname           = inet6_getname,
1323         .poll              = datagram_poll,             /* ok           */
1324         .ioctl             = inet6_ioctl,               /* must change  */
1325         .listen            = sock_no_listen,            /* ok           */
1326         .shutdown          = inet_shutdown,             /* ok           */
1327         .setsockopt        = sock_common_setsockopt,    /* ok           */
1328         .getsockopt        = sock_common_getsockopt,    /* ok           */
1329         .sendmsg           = inet_sendmsg,              /* ok           */
1330         .recvmsg           = sock_common_recvmsg,       /* ok           */
1331         .mmap              = sock_no_mmap,
1332         .sendpage          = sock_no_sendpage,
1333 #ifdef CONFIG_COMPAT
1334         .compat_setsockopt = compat_sock_common_setsockopt,
1335         .compat_getsockopt = compat_sock_common_getsockopt,
1336 #endif
1337 };
1338
1339 static struct inet_protosw rawv6_protosw = {
1340         .type           = SOCK_RAW,
1341         .protocol       = IPPROTO_IP,   /* wild card */
1342         .prot           = &rawv6_prot,
1343         .ops            = &inet6_sockraw_ops,
1344         .no_check       = UDP_CSUM_DEFAULT,
1345         .flags          = INET_PROTOSW_REUSE,
1346 };
1347
1348 int __init rawv6_init(void)
1349 {
1350         int ret;
1351
1352         ret = inet6_register_protosw(&rawv6_protosw);
1353         if (ret)
1354                 goto out;
1355 out:
1356         return ret;
1357 }
1358
1359 void rawv6_exit(void)
1360 {
1361         inet6_unregister_protosw(&rawv6_protosw);
1362 }