net/ipv6/raw.c

   1 /*
   2  *      RAW sockets for IPv6
   3  *      Linux INET6 implementation
   4  *
   5  *      Authors:
   6  *      Pedro Roque             <roque@di.fc.ul.pt>
   7  *
   8  *      Adapted from linux/net/ipv4/raw.c
   9  *
  10  *      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 <linux/compat.h>
  35 #include <asm/uaccess.h>
  36 #include <asm/ioctls.h>
  37
  38 #include <net/net_namespace.h>
  39 #include <net/ip.h>
  40 #include <net/sock.h>
  41 #include <net/snmp.h>
  42
  43 #include <net/ipv6.h>
  44 #include <net/ndisc.h>
  45 #include <net/protocol.h>
  46 #include <net/ip6_route.h>
  47 #include <net/ip6_checksum.h>
  48 #include <net/addrconf.h>
  49 #include <net/transp_v6.h>
  50 #include <net/udp.h>
  51 #include <net/inet_common.h>
  52 #include <net/tcp_states.h>
  53 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
  54 #include <net/mip6.h>
  55 #endif
  56 #include <linux/mroute6.h>
  57
  58 #include <net/raw.h>
  59 #include <net/rawv6.h>
  60 #include <net/xfrm.h>
  61
  62 #include <linux/proc_fs.h>
  63 #include <linux/seq_file.h>
  64
  65 static struct raw_hashinfo raw_v6_hashinfo = {
  66         .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
  67 };
  68
  69 static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
  70                 unsigned short num, const struct in6_addr *loc_addr,
  71                 const struct in6_addr *rmt_addr, int dif)
  72 {
  73         struct hlist_node *node;
  74         int is_multicast = ipv6_addr_is_multicast(loc_addr);
  75
  76         sk_for_each_from(sk, node)
  77                 if (inet_sk(sk)->inet_num == num) {
  78                         struct ipv6_pinfo *np = inet6_sk(sk);
  79
  80                         if (!net_eq(sock_net(sk), net))
  81                                 continue;
  82
  83                         if (!ipv6_addr_any(&np->daddr) &&
  84                             !ipv6_addr_equal(&np->daddr, rmt_addr))
  85                                 continue;
  86
  87                         if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
  88                                 continue;
  89
  90                         if (!ipv6_addr_any(&np->rcv_saddr)) {
  91                                 if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
  92                                         goto found;
  93                                 if (is_multicast &&
  94                                     inet6_mc_check(sk, loc_addr, rmt_addr))
  95                                         goto found;
  96                                 continue;
  97                         }
  98                         goto found;
  99                 }
 100         sk = NULL;
 101 found:
 102         return sk;
 103 }
 104
 105 /*
 106  *      0 - deliver
 107  *      1 - block
 108  */
 109 static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
 110 {
 111         struct icmp6hdr *icmph;
 112         struct raw6_sock *rp = raw6_sk(sk);
 113
 114         if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) {
 115                 __u32 *data = &rp->filter.data[0];
 116                 int bit_nr;
 117
 118                 icmph = (struct icmp6hdr *) skb->data;
 119                 bit_nr = icmph->icmp6_type;
 120
 121                 return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0;
 122         }
 123         return 0;
 124 }
 125
 126 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 127 typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb);
 128
 129 static mh_filter_t __rcu *mh_filter __read_mostly;
 130
 131 int rawv6_mh_filter_register(mh_filter_t filter)
 132 {
 133         RCU_INIT_POINTER(mh_filter, filter);
 134         return 0;
 135 }
 136 EXPORT_SYMBOL(rawv6_mh_filter_register);
 137
 138 int rawv6_mh_filter_unregister(mh_filter_t filter)
 139 {
 140         RCU_INIT_POINTER(mh_filter, NULL);
 141         synchronize_rcu();
 142         return 0;
 143 }
 144 EXPORT_SYMBOL(rawv6_mh_filter_unregister);
 145
 146 #endif
 147
 148 /*
 149  *      demultiplex raw sockets.
 150  *      (should consider queueing the skb in the sock receive_queue
 151  *      without calling rawv6.c)
 152  *
 153  *      Caller owns SKB so we must make clones.
 154  */
 155 static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
 156 {
 157         const struct in6_addr *saddr;
 158         const struct in6_addr *daddr;
 159         struct sock *sk;
 160         int delivered = 0;
 161         __u8 hash;
 162         struct net *net;
 163
 164         saddr = &ipv6_hdr(skb)->saddr;
 165         daddr = saddr + 1;
 166
 167         hash = nexthdr & (MAX_INET_PROTOS - 1);
 168
 169         read_lock(&raw_v6_hashinfo.lock);
 170         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 171
 172         if (sk == NULL)
 173                 goto out;
 174
 175         net = dev_net(skb->dev);
 176         sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
 177
 178         while (sk) {
 179                 int filtered;
 180
 181                 delivered = 1;
 182                 switch (nexthdr) {
 183                 case IPPROTO_ICMPV6:
 184                         filtered = icmpv6_filter(sk, skb);
 185                         break;
 186
 187 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 188                 case IPPROTO_MH:
 189                 {
 190                         /* XXX: To validate MH only once for each packet,
 191                          * this is placed here. It should be after checking
 192                          * xfrm policy, however it doesn't. The checking xfrm
 193                          * policy is placed in rawv6_rcv() because it is
 194                          * required for each socket.
 195                          */
 196                         mh_filter_t *filter;
 197
 198                         filter = rcu_dereference(mh_filter);
 199                         filtered = filter ? (*filter)(sk, skb) : 0;
 200                         break;
 201                 }
 202 #endif
 203                 default:
 204                         filtered = 0;
 205                         break;
 206                 }
 207
 208                 if (filtered < 0)
 209                         break;
 210                 if (filtered == 0) {
 211                         struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
 212
 213                         /* Not releasing hash table! */
 214                         if (clone) {
 215                                 nf_reset(clone);
 216                                 rawv6_rcv(sk, clone);
 217                         }
 218                 }
 219                 sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
 220                                      IP6CB(skb)->iif);
 221         }
 222 out:
 223         read_unlock(&raw_v6_hashinfo.lock);
 224         return delivered;
 225 }
 226
 227 int raw6_local_deliver(struct sk_buff *skb, int nexthdr)
 228 {
 229         struct sock *raw_sk;
 230
 231         raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]);
 232         if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
 233                 raw_sk = NULL;
 234
 235         return raw_sk != NULL;
 236 }
 237
 238 /* This cleans up af_inet6 a bit. -DaveM */
 239 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 240 {
 241         struct inet_sock *inet = inet_sk(sk);
 242         struct ipv6_pinfo *np = inet6_sk(sk);
 243         struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
 244         __be32 v4addr = 0;
 245         int addr_type;
 246         int err;
 247
 248         if (addr_len < SIN6_LEN_RFC2133)
 249                 return -EINVAL;
 250         addr_type = ipv6_addr_type(&addr->sin6_addr);
 251
 252         /* Raw sockets are IPv6 only */
 253         if (addr_type == IPV6_ADDR_MAPPED)
 254                 return -EADDRNOTAVAIL;
 255
 256         lock_sock(sk);
 257
 258         err = -EINVAL;
 259         if (sk->sk_state != TCP_CLOSE)
 260                 goto out;
 261
 262         rcu_read_lock();
 263         /* Check if the address belongs to the host. */
 264         if (addr_type != IPV6_ADDR_ANY) {
 265                 struct net_device *dev = NULL;
 266
 267                 if (addr_type & IPV6_ADDR_LINKLOCAL) {
 268                         if (addr_len >= sizeof(struct sockaddr_in6) &&
 269                             addr->sin6_scope_id) {
 270                                 /* Override any existing binding, if another
 271                                  * one is supplied by user.
 272                                  */
 273                                 sk->sk_bound_dev_if = addr->sin6_scope_id;
 274                         }
 275
 276                         /* Binding to link-local address requires an interface */
 277                         if (!sk->sk_bound_dev_if)
 278                                 goto out_unlock;
 279
 280                         err = -ENODEV;
 281                         dev = dev_get_by_index_rcu(sock_net(sk),
 282                                                    sk->sk_bound_dev_if);
 283                         if (!dev)
 284                                 goto out_unlock;
 285                 }
 286
 287                 /* ipv4 addr of the socket is invalid.  Only the
 288                  * unspecified and mapped address have a v4 equivalent.
 289                  */
 290                 v4addr = LOOPBACK4_IPV6;
 291                 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
 292                         err = -EADDRNOTAVAIL;
 293                         if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
 294                                            dev, 0)) {
 295                                 goto out_unlock;
 296                         }
 297                 }
 298         }
 299
 300         inet->inet_rcv_saddr = inet->inet_saddr = v4addr;
 301         ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
 302         if (!(addr_type & IPV6_ADDR_MULTICAST))
 303                 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
 304         err = 0;
 305 out_unlock:
 306         rcu_read_unlock();
 307 out:
 308         release_sock(sk);
 309         return err;
 310 }
 311
 312 static void rawv6_err(struct sock *sk, struct sk_buff *skb,
 313                struct inet6_skb_parm *opt,
 314                u8 type, u8 code, int offset, __be32 info)
 315 {
 316         struct inet_sock *inet = inet_sk(sk);
 317         struct ipv6_pinfo *np = inet6_sk(sk);
 318         int err;
 319         int harderr;
 320
 321         /* Report error on raw socket, if:
 322            1. User requested recverr.
 323            2. Socket is connected (otherwise the error indication
 324               is useless without recverr and error is hard.
 325          */
 326         if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
 327                 return;
 328
 329         harderr = icmpv6_err_convert(type, code, &err);
 330         if (type == ICMPV6_PKT_TOOBIG)
 331                 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
 332
 333         if (np->recverr) {
 334                 u8 *payload = skb->data;
 335                 if (!inet->hdrincl)
 336                         payload += offset;
 337                 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
 338         }
 339
 340         if (np->recverr || harderr) {
 341                 sk->sk_err = err;
 342                 sk->sk_error_report(sk);
 343         }
 344 }
 345
 346 void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
 347                 u8 type, u8 code, int inner_offset, __be32 info)
 348 {
 349         struct sock *sk;
 350         int hash;
 351         const struct in6_addr *saddr, *daddr;
 352         struct net *net;
 353
 354         hash = nexthdr & (RAW_HTABLE_SIZE - 1);
 355
 356         read_lock(&raw_v6_hashinfo.lock);
 357         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 358         if (sk != NULL) {
 359                 /* Note: ipv6_hdr(skb) != skb->data */
 360                 const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data;
 361                 saddr = &ip6h->saddr;
 362                 daddr = &ip6h->daddr;
 363                 net = dev_net(skb->dev);
 364
 365                 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
 366                                                 IP6CB(skb)->iif))) {
 367                         rawv6_err(sk, skb, NULL, type, code,
 368                                         inner_offset, info);
 369                         sk = sk_next(sk);
 370                 }
 371         }
 372         read_unlock(&raw_v6_hashinfo.lock);
 373 }
 374
 375 static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb)
 376 {
 377         if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) &&
 378             skb_checksum_complete(skb)) {
 379                 atomic_inc(&sk->sk_drops);
 380                 kfree_skb(skb);
 381                 return NET_RX_DROP;
 382         }
 383
 384         /* Charge it to the socket. */
 385         if (ip_queue_rcv_skb(sk, skb) < 0) {
 386                 kfree_skb(skb);
 387                 return NET_RX_DROP;
 388         }
 389
 390         return 0;
 391 }
 392
 393 /*
 394  *      This is next to useless...
 395  *      if we demultiplex in network layer we don't need the extra call
 396  *      just to queue the skb...
 397  *      maybe we could have the network decide upon a hint if it
 398  *      should call raw_rcv for demultiplexing
 399  */
 400 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
 401 {
 402         struct inet_sock *inet = inet_sk(sk);
 403         struct raw6_sock *rp = raw6_sk(sk);
 404
 405         if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
 406                 atomic_inc(&sk->sk_drops);
 407                 kfree_skb(skb);
 408                 return NET_RX_DROP;
 409         }
 410
 411         if (!rp->checksum)
 412                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 413
 414         if (skb->ip_summed == CHECKSUM_COMPLETE) {
 415                 skb_postpull_rcsum(skb, skb_network_header(skb),
 416                                    skb_network_header_len(skb));
 417                 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 418                                      &ipv6_hdr(skb)->daddr,
 419                                      skb->len, inet->inet_num, skb->csum))
 420                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 421         }
 422         if (!skb_csum_unnecessary(skb))
 423                 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 424                                                          &ipv6_hdr(skb)->daddr,
 425                                                          skb->len,
 426                                                          inet->inet_num, 0));
 427
 428         if (inet->hdrincl) {
 429                 if (skb_checksum_complete(skb)) {
 430                         atomic_inc(&sk->sk_drops);
 431                         kfree_skb(skb);
 432                         return NET_RX_DROP;
 433                 }
 434         }
 435
 436         rawv6_rcv_skb(sk, skb);
 437         return 0;
 438 }
 439
 440
 441 /*
 442  *      This should be easy, if there is something there
 443  *      we return it, otherwise we block.
 444  */
 445
 446 static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
 447                   struct msghdr *msg, size_t len,
 448                   int noblock, int flags, int *addr_len)
 449 {
 450         struct ipv6_pinfo *np = inet6_sk(sk);
 451         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
 452         struct sk_buff *skb;
 453         size_t copied;
 454         int err;
 455
 456         if (flags & MSG_OOB)
 457                 return -EOPNOTSUPP;
 458
 459         if (addr_len)
 460                 *addr_len=sizeof(*sin6);
 461
 462         if (flags & MSG_ERRQUEUE)
 463                 return ipv6_recv_error(sk, msg, len);
 464
 465         if (np->rxpmtu && np->rxopt.bits.rxpmtu)
 466                 return ipv6_recv_rxpmtu(sk, msg, len);
 467
 468         skb = skb_recv_datagram(sk, flags, noblock, &err);
 469         if (!skb)
 470                 goto out;
 471
 472         copied = skb->len;
 473         if (copied > len) {
 474                 copied = len;
 475                 msg->msg_flags |= MSG_TRUNC;
 476         }
 477
 478         if (skb_csum_unnecessary(skb)) {
 479                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 480         } else if (msg->msg_flags&MSG_TRUNC) {
 481                 if (__skb_checksum_complete(skb))
 482                         goto csum_copy_err;
 483                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 484         } else {
 485                 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
 486                 if (err == -EINVAL)
 487                         goto csum_copy_err;
 488         }
 489         if (err)
 490                 goto out_free;
 491
 492         /* Copy the address. */
 493         if (sin6) {
 494                 sin6->sin6_family = AF_INET6;
 495                 sin6->sin6_port = 0;
 496                 ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr);
 497                 sin6->sin6_flowinfo = 0;
 498                 sin6->sin6_scope_id = 0;
 499                 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
 500                         sin6->sin6_scope_id = IP6CB(skb)->iif;
 501         }
 502
 503         sock_recv_ts_and_drops(msg, sk, skb);
 504
 505         if (np->rxopt.all)
 506                 datagram_recv_ctl(sk, msg, skb);
 507
 508         err = copied;
 509         if (flags & MSG_TRUNC)
 510                 err = skb->len;
 511
 512 out_free:
 513         skb_free_datagram(sk, skb);
 514 out:
 515         return err;
 516
 517 csum_copy_err:
 518         skb_kill_datagram(sk, skb, flags);
 519
 520         /* Error for blocking case is chosen to masquerade
 521            as some normal condition.
 522          */
 523         err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
 524         goto out;
 525 }
 526
 527 static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
 528                                      struct raw6_sock *rp)
 529 {
 530         struct sk_buff *skb;
 531         int err = 0;
 532         int offset;
 533         int len;
 534         int total_len;
 535         __wsum tmp_csum;
 536         __sum16 csum;
 537
 538         if (!rp->checksum)
 539                 goto send;
 540
 541         if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
 542                 goto out;
 543
 544         offset = rp->offset;
 545         total_len = inet_sk(sk)->cork.base.length;
 546         if (offset >= total_len - 1) {
 547                 err = -EINVAL;
 548                 ip6_flush_pending_frames(sk);
 549                 goto out;
 550         }
 551
 552         /* should be check HW csum miyazawa */
 553         if (skb_queue_len(&sk->sk_write_queue) == 1) {
 554                 /*
 555                  * Only one fragment on the socket.
 556                  */
 557                 tmp_csum = skb->csum;
 558         } else {
 559                 struct sk_buff *csum_skb = NULL;
 560                 tmp_csum = 0;
 561
 562                 skb_queue_walk(&sk->sk_write_queue, skb) {
 563                         tmp_csum = csum_add(tmp_csum, skb->csum);
 564
 565                         if (csum_skb)
 566                                 continue;
 567
 568                         len = skb->len - skb_transport_offset(skb);
 569                         if (offset >= len) {
 570                                 offset -= len;
 571                                 continue;
 572                         }
 573
 574                         csum_skb = skb;
 575                 }
 576
 577                 skb = csum_skb;
 578         }
 579
 580         offset += skb_transport_offset(skb);
 581         if (skb_copy_bits(skb, offset, &csum, 2))
 582                 BUG();
 583
 584         /* in case cksum was not initialized */
 585         if (unlikely(csum))
 586                 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
 587
 588         csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr,
 589                                total_len, fl6->flowi6_proto, tmp_csum);
 590
 591         if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP)
 592                 csum = CSUM_MANGLED_0;
 593
 594         if (skb_store_bits(skb, offset, &csum, 2))
 595                 BUG();
 596
 597 send:
 598         err = ip6_push_pending_frames(sk);
 599 out:
 600         return err;
 601 }
 602
 603 static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
 604                         struct flowi6 *fl6, struct dst_entry **dstp,
 605                         unsigned int flags)
 606 {
 607         struct ipv6_pinfo *np = inet6_sk(sk);
 608         struct ipv6hdr *iph;
 609         struct sk_buff *skb;
 610         int err;
 611         struct rt6_info *rt = (struct rt6_info *)*dstp;
 612
 613         if (length > rt->dst.dev->mtu) {
 614                 ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu);
 615                 return -EMSGSIZE;
 616         }
 617         if (flags&MSG_PROBE)
 618                 goto out;
 619
 620         skb = sock_alloc_send_skb(sk,
 621                                   length + LL_ALLOCATED_SPACE(rt->dst.dev) + 15,
 622                                   flags & MSG_DONTWAIT, &err);
 623         if (skb == NULL)
 624                 goto error;
 625         skb_reserve(skb, LL_RESERVED_SPACE(rt->dst.dev));
 626
 627         skb->priority = sk->sk_priority;
 628         skb->mark = sk->sk_mark;
 629         skb_dst_set(skb, &rt->dst);
 630         *dstp = NULL;
 631
 632         skb_put(skb, length);
 633         skb_reset_network_header(skb);
 634         iph = ipv6_hdr(skb);
 635
 636         skb->ip_summed = CHECKSUM_NONE;
 637
 638         skb->transport_header = skb->network_header;
 639         err = memcpy_fromiovecend((void *)iph, from, 0, length);
 640         if (err)
 641                 goto error_fault;
 642
 643         IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
 644         err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL,
 645                       rt->dst.dev, dst_output);
 646         if (err > 0)
 647                 err = net_xmit_errno(err);
 648         if (err)
 649                 goto error;
 650 out:
 651         return 0;
 652
 653 error_fault:
 654         err = -EFAULT;
 655         kfree_skb(skb);
 656 error:
 657         IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
 658         if (err == -ENOBUFS && !np->recverr)
 659                 err = 0;
 660         return err;
 661 }
 662
 663 static int rawv6_probe_proto_opt(struct flowi6 *fl6, struct msghdr *msg)
 664 {
 665         struct iovec *iov;
 666         u8 __user *type = NULL;
 667         u8 __user *code = NULL;
 668         u8 len = 0;
 669         int probed = 0;
 670         int i;
 671
 672         if (!msg->msg_iov)
 673                 return 0;
 674
 675         for (i = 0; i < msg->msg_iovlen; i++) {
 676                 iov = &msg->msg_iov[i];
 677                 if (!iov)
 678                         continue;
 679
 680                 switch (fl6->flowi6_proto) {
 681                 case IPPROTO_ICMPV6:
 682                         /* check if one-byte field is readable or not. */
 683                         if (iov->iov_base && iov->iov_len < 1)
 684                                 break;
 685
 686                         if (!type) {
 687                                 type = iov->iov_base;
 688                                 /* check if code field is readable or not. */
 689                                 if (iov->iov_len > 1)
 690                                         code = type + 1;
 691                         } else if (!code)
 692                                 code = iov->iov_base;
 693
 694                         if (type && code) {
 695                                 if (get_user(fl6->fl6_icmp_type, type) ||
 696                                     get_user(fl6->fl6_icmp_code, code))
 697                                         return -EFAULT;
 698                                 probed = 1;
 699                         }
 700                         break;
 701                 case IPPROTO_MH:
 702                         if (iov->iov_base && iov->iov_len < 1)
 703                                 break;
 704                         /* check if type field is readable or not. */
 705                         if (iov->iov_len > 2 - len) {
 706                                 u8 __user *p = iov->iov_base;
 707                                 if (get_user(fl6->fl6_mh_type, &p[2 - len]))
 708                                         return -EFAULT;
 709                                 probed = 1;
 710                         } else
 711                                 len += iov->iov_len;
 712
 713                         break;
 714                 default:
 715                         probed = 1;
 716                         break;
 717                 }
 718                 if (probed)
 719                         break;
 720         }
 721         return 0;
 722 }
 723
 724 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
 725                    struct msghdr *msg, size_t len)
 726 {
 727         struct ipv6_txoptions opt_space;
 728         struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
 729         struct in6_addr *daddr, *final_p, final;
 730         struct inet_sock *inet = inet_sk(sk);
 731         struct ipv6_pinfo *np = inet6_sk(sk);
 732         struct raw6_sock *rp = raw6_sk(sk);
 733         struct ipv6_txoptions *opt = NULL;
 734         struct ip6_flowlabel *flowlabel = NULL;
 735         struct dst_entry *dst = NULL;
 736         struct flowi6 fl6;
 737         int addr_len = msg->msg_namelen;
 738         int hlimit = -1;
 739         int tclass = -1;
 740         int dontfrag = -1;
 741         u16 proto;
 742         int err;
 743
 744         /* Rough check on arithmetic overflow,
 745            better check is made in ip6_append_data().
 746          */
 747         if (len > INT_MAX)
 748                 return -EMSGSIZE;
 749
 750         /* Mirror BSD error message compatibility */
 751         if (msg->msg_flags & MSG_OOB)
 752                 return -EOPNOTSUPP;
 753
 754         /*
 755          *      Get and verify the address.
 756          */
 757         memset(&fl6, 0, sizeof(fl6));
 758
 759         fl6.flowi6_mark = sk->sk_mark;
 760
 761         if (sin6) {
 762                 if (addr_len < SIN6_LEN_RFC2133)
 763                         return -EINVAL;
 764
 765                 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
 766                         return -EAFNOSUPPORT;
 767
 768                 /* port is the proto value [0..255] carried in nexthdr */
 769                 proto = ntohs(sin6->sin6_port);
 770
 771                 if (!proto)
 772                         proto = inet->inet_num;
 773                 else if (proto != inet->inet_num)
 774                         return -EINVAL;
 775
 776                 if (proto > 255)
 777                         return -EINVAL;
 778
 779                 daddr = &sin6->sin6_addr;
 780                 if (np->sndflow) {
 781                         fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
 782                         if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
 783                                 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
 784                                 if (flowlabel == NULL)
 785                                         return -EINVAL;
 786                                 daddr = &flowlabel->dst;
 787                         }
 788                 }
 789
 790                 /*
 791                  * Otherwise it will be difficult to maintain
 792                  * sk->sk_dst_cache.
 793                  */
 794                 if (sk->sk_state == TCP_ESTABLISHED &&
 795                     ipv6_addr_equal(daddr, &np->daddr))
 796                         daddr = &np->daddr;
 797
 798                 if (addr_len >= sizeof(struct sockaddr_in6) &&
 799                     sin6->sin6_scope_id &&
 800                     ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
 801                         fl6.flowi6_oif = sin6->sin6_scope_id;
 802         } else {
 803                 if (sk->sk_state != TCP_ESTABLISHED)
 804                         return -EDESTADDRREQ;
 805
 806                 proto = inet->inet_num;
 807                 daddr = &np->daddr;
 808                 fl6.flowlabel = np->flow_label;
 809         }
 810
 811         if (fl6.flowi6_oif == 0)
 812                 fl6.flowi6_oif = sk->sk_bound_dev_if;
 813
 814         if (msg->msg_controllen) {
 815                 opt = &opt_space;
 816                 memset(opt, 0, sizeof(struct ipv6_txoptions));
 817                 opt->tot_len = sizeof(struct ipv6_txoptions);
 818
 819                 err = datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt,
 820                                         &hlimit, &tclass, &dontfrag);
 821                 if (err < 0) {
 822                         fl6_sock_release(flowlabel);
 823                         return err;
 824                 }
 825                 if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
 826                         flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
 827                         if (flowlabel == NULL)
 828                                 return -EINVAL;
 829                 }
 830                 if (!(opt->opt_nflen|opt->opt_flen))
 831                         opt = NULL;
 832         }
 833         if (opt == NULL)
 834                 opt = np->opt;
 835         if (flowlabel)
 836                 opt = fl6_merge_options(&opt_space, flowlabel, opt);
 837         opt = ipv6_fixup_options(&opt_space, opt);
 838
 839         fl6.flowi6_proto = proto;
 840         err = rawv6_probe_proto_opt(&fl6, msg);
 841         if (err)
 842                 goto out;
 843
 844         if (!ipv6_addr_any(daddr))
 845                 ipv6_addr_copy(&fl6.daddr, daddr);
 846         else
 847                 fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
 848         if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
 849                 ipv6_addr_copy(&fl6.saddr, &np->saddr);
 850
 851         final_p = fl6_update_dst(&fl6, opt, &final);
 852
 853         if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
 854                 fl6.flowi6_oif = np->mcast_oif;
 855         security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
 856
 857         dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true);
 858         if (IS_ERR(dst)) {
 859                 err = PTR_ERR(dst);
 860                 goto out;
 861         }
 862         if (hlimit < 0) {
 863                 if (ipv6_addr_is_multicast(&fl6.daddr))
 864                         hlimit = np->mcast_hops;
 865                 else
 866                         hlimit = np->hop_limit;
 867                 if (hlimit < 0)
 868                         hlimit = ip6_dst_hoplimit(dst);
 869         }
 870
 871         if (tclass < 0)
 872                 tclass = np->tclass;
 873
 874         if (dontfrag < 0)
 875                 dontfrag = np->dontfrag;
 876
 877         if (msg->msg_flags&MSG_CONFIRM)
 878                 goto do_confirm;
 879
 880 back_from_confirm:
 881         if (inet->hdrincl)
 882                 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl6, &dst, msg->msg_flags);
 883         else {
 884                 lock_sock(sk);
 885                 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
 886                         len, 0, hlimit, tclass, opt, &fl6, (struct rt6_info*)dst,
 887                         msg->msg_flags, dontfrag);
 888
 889                 if (err)
 890                         ip6_flush_pending_frames(sk);
 891                 else if (!(msg->msg_flags & MSG_MORE))
 892                         err = rawv6_push_pending_frames(sk, &fl6, rp);
 893                 release_sock(sk);
 894         }
 895 done:
 896         dst_release(dst);
 897 out:
 898         fl6_sock_release(flowlabel);
 899         return err<0?err:len;
 900 do_confirm:
 901         dst_confirm(dst);
 902         if (!(msg->msg_flags & MSG_PROBE) || len)
 903                 goto back_from_confirm;
 904         err = 0;
 905         goto done;
 906 }
 907
 908 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
 909                                char __user *optval, int optlen)
 910 {
 911         switch (optname) {
 912         case ICMPV6_FILTER:
 913                 if (optlen > sizeof(struct icmp6_filter))
 914                         optlen = sizeof(struct icmp6_filter);
 915                 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
 916                         return -EFAULT;
 917                 return 0;
 918         default:
 919                 return -ENOPROTOOPT;
 920         }
 921
 922         return 0;
 923 }
 924
 925 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
 926                                char __user *optval, int __user *optlen)
 927 {
 928         int len;
 929
 930         switch (optname) {
 931         case ICMPV6_FILTER:
 932                 if (get_user(len, optlen))
 933                         return -EFAULT;
 934                 if (len < 0)
 935                         return -EINVAL;
 936                 if (len > sizeof(struct icmp6_filter))
 937                         len = sizeof(struct icmp6_filter);
 938                 if (put_user(len, optlen))
 939                         return -EFAULT;
 940                 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
 941                         return -EFAULT;
 942                 return 0;
 943         default:
 944                 return -ENOPROTOOPT;
 945         }
 946
 947         return 0;
 948 }
 949
 950
 951 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
 952                             char __user *optval, unsigned int optlen)
 953 {
 954         struct raw6_sock *rp = raw6_sk(sk);
 955         int val;
 956
 957         if (get_user(val, (int __user *)optval))
 958                 return -EFAULT;
 959
 960         switch (optname) {
 961         case IPV6_CHECKSUM:
 962                 if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
 963                     level == IPPROTO_IPV6) {
 964                         /*
 965                          * RFC3542 tells that IPV6_CHECKSUM socket
 966                          * option in the IPPROTO_IPV6 level is not
 967                          * allowed on ICMPv6 sockets.
 968                          * If you want to set it, use IPPROTO_RAW
 969                          * level IPV6_CHECKSUM socket option
 970                          * (Linux extension).
 971                          */
 972                         return -EINVAL;
 973                 }
 974
 975                 /* You may get strange result with a positive odd offset;
 976                    RFC2292bis agrees with me. */
 977                 if (val > 0 && (val&1))
 978                         return -EINVAL;
 979                 if (val < 0) {
 980                         rp->checksum = 0;
 981                 } else {
 982                         rp->checksum = 1;
 983                         rp->offset = val;
 984                 }
 985
 986                 return 0;
 987
 988         default:
 989                 return -ENOPROTOOPT;
 990         }
 991 }
 992
 993 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
 994                           char __user *optval, unsigned int optlen)
 995 {
 996         switch (level) {
 997         case SOL_RAW:
 998                 break;
 999
1000         case SOL_ICMPV6:
1001                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1002                         return -EOPNOTSUPP;
1003                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1004         case SOL_IPV6:
1005                 if (optname == IPV6_CHECKSUM)
1006                         break;
1007         default:
1008                 return ipv6_setsockopt(sk, level, optname, optval, optlen);
1009         }
1010
1011         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1012 }
1013
1014 #ifdef CONFIG_COMPAT
1015 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1016                                    char __user *optval, unsigned int optlen)
1017 {
1018         switch (level) {
1019         case SOL_RAW:
1020                 break;
1021         case SOL_ICMPV6:
1022                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1023                         return -EOPNOTSUPP;
1024                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1025         case SOL_IPV6:
1026                 if (optname == IPV6_CHECKSUM)
1027                         break;
1028         default:
1029                 return compat_ipv6_setsockopt(sk, level, optname,
1030                                               optval, optlen);
1031         }
1032         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1033 }
1034 #endif
1035
1036 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1037                             char __user *optval, int __user *optlen)
1038 {
1039         struct raw6_sock *rp = raw6_sk(sk);
1040         int val, len;
1041
1042         if (get_user(len,optlen))
1043                 return -EFAULT;
1044
1045         switch (optname) {
1046         case IPV6_CHECKSUM:
1047                 /*
1048                  * We allow getsockopt() for IPPROTO_IPV6-level
1049                  * IPV6_CHECKSUM socket option on ICMPv6 sockets
1050                  * since RFC3542 is silent about it.
1051                  */
1052                 if (rp->checksum == 0)
1053                         val = -1;
1054                 else
1055                         val = rp->offset;
1056                 break;
1057
1058         default:
1059                 return -ENOPROTOOPT;
1060         }
1061
1062         len = min_t(unsigned int, sizeof(int), len);
1063
1064         if (put_user(len, optlen))
1065                 return -EFAULT;
1066         if (copy_to_user(optval,&val,len))
1067                 return -EFAULT;
1068         return 0;
1069 }
1070
1071 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1072                           char __user *optval, int __user *optlen)
1073 {
1074         switch (level) {
1075         case SOL_RAW:
1076                 break;
1077
1078         case SOL_ICMPV6:
1079                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1080                         return -EOPNOTSUPP;
1081                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1082         case SOL_IPV6:
1083                 if (optname == IPV6_CHECKSUM)
1084                         break;
1085         default:
1086                 return ipv6_getsockopt(sk, level, optname, optval, optlen);
1087         }
1088
1089         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1090 }
1091
1092 #ifdef CONFIG_COMPAT
1093 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1094                                    char __user *optval, int __user *optlen)
1095 {
1096         switch (level) {
1097         case SOL_RAW:
1098                 break;
1099         case SOL_ICMPV6:
1100                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1101                         return -EOPNOTSUPP;
1102                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1103         case SOL_IPV6:
1104                 if (optname == IPV6_CHECKSUM)
1105                         break;
1106         default:
1107                 return compat_ipv6_getsockopt(sk, level, optname,
1108                                               optval, optlen);
1109         }
1110         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1111 }
1112 #endif
1113
1114 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1115 {
1116         switch (cmd) {
1117         case SIOCOUTQ: {
1118                 int amount = sk_wmem_alloc_get(sk);
1119
1120                 return put_user(amount, (int __user *)arg);
1121         }
1122         case SIOCINQ: {
1123                 struct sk_buff *skb;
1124                 int amount = 0;
1125
1126                 spin_lock_bh(&sk->sk_receive_queue.lock);
1127                 skb = skb_peek(&sk->sk_receive_queue);
1128                 if (skb != NULL)
1129                         amount = skb->tail - skb->transport_header;
1130                 spin_unlock_bh(&sk->sk_receive_queue.lock);
1131                 return put_user(amount, (int __user *)arg);
1132         }
1133
1134         default:
1135 #ifdef CONFIG_IPV6_MROUTE
1136                 return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1137 #else
1138                 return -ENOIOCTLCMD;
1139 #endif
1140         }
1141 }
1142
1143 #ifdef CONFIG_COMPAT
1144 static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
1145 {
1146         switch (cmd) {
1147         case SIOCOUTQ:
1148         case SIOCINQ:
1149                 return -ENOIOCTLCMD;
1150         default:
1151 #ifdef CONFIG_IPV6_MROUTE
1152                 return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
1153 #else
1154                 return -ENOIOCTLCMD;
1155 #endif
1156         }
1157 }
1158 #endif
1159
1160 static void rawv6_close(struct sock *sk, long timeout)
1161 {
1162         if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1163                 ip6_ra_control(sk, -1);
1164         ip6mr_sk_done(sk);
1165         sk_common_release(sk);
1166 }
1167
1168 static void raw6_destroy(struct sock *sk)
1169 {
1170         lock_sock(sk);
1171         ip6_flush_pending_frames(sk);
1172         release_sock(sk);
1173
1174         inet6_destroy_sock(sk);
1175 }
1176
1177 static int rawv6_init_sk(struct sock *sk)
1178 {
1179         struct raw6_sock *rp = raw6_sk(sk);
1180
1181         switch (inet_sk(sk)->inet_num) {
1182         case IPPROTO_ICMPV6:
1183                 rp->checksum = 1;
1184                 rp->offset   = 2;
1185                 break;
1186         case IPPROTO_MH:
1187                 rp->checksum = 1;
1188                 rp->offset   = 4;
1189                 break;
1190         default:
1191                 break;
1192         }
1193         return 0;
1194 }
1195
1196 struct proto rawv6_prot = {
1197         .name              = "RAWv6",
1198         .owner             = THIS_MODULE,
1199         .close             = rawv6_close,
1200         .destroy           = raw6_destroy,
1201         .connect           = ip6_datagram_connect,
1202         .disconnect        = udp_disconnect,
1203         .ioctl             = rawv6_ioctl,
1204         .init              = rawv6_init_sk,
1205         .setsockopt        = rawv6_setsockopt,
1206         .getsockopt        = rawv6_getsockopt,
1207         .sendmsg           = rawv6_sendmsg,
1208         .recvmsg           = rawv6_recvmsg,
1209         .bind              = rawv6_bind,
1210         .backlog_rcv       = rawv6_rcv_skb,
1211         .hash              = raw_hash_sk,
1212         .unhash            = raw_unhash_sk,
1213         .obj_size          = sizeof(struct raw6_sock),
1214         .h.raw_hash        = &raw_v6_hashinfo,
1215 #ifdef CONFIG_COMPAT
1216         .compat_setsockopt = compat_rawv6_setsockopt,
1217         .compat_getsockopt = compat_rawv6_getsockopt,
1218         .compat_ioctl      = compat_rawv6_ioctl,
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         const 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 %pK %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 }