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, struct in6_addr *loc_addr,
  71                 struct in6_addr *rmt_addr, int dif)
  72 {
  73         struct hlist_node *node;
  74         int is_multicast = ipv6_addr_is_multicast(loc_addr);
  75
  76         sk_for_each_from(sk, node)
  77                 if (inet_sk(sk)->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_assign_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_assign_pointer(mh_filter, NULL);
 141         synchronize_rcu();
 142         return 0;
 143 }
 144 EXPORT_SYMBOL(rawv6_mh_filter_unregister);
 145
 146 #endif
 147
 148 /*
 149  *      demultiplex raw sockets.
 150  *      (should consider queueing the skb in the sock receive_queue
 151  *      without calling rawv6.c)
 152  *
 153  *      Caller owns SKB so we must make clones.
 154  */
 155 static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
 156 {
 157         struct in6_addr *saddr;
 158         struct in6_addr *daddr;
 159         struct sock *sk;
 160         int delivered = 0;
 161         __u8 hash;
 162         struct net *net;
 163
 164         saddr = &ipv6_hdr(skb)->saddr;
 165         daddr = saddr + 1;
 166
 167         hash = nexthdr & (MAX_INET_PROTOS - 1);
 168
 169         read_lock(&raw_v6_hashinfo.lock);
 170         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 171
 172         if (sk == NULL)
 173                 goto out;
 174
 175         net = dev_net(skb->dev);
 176         sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
 177
 178         while (sk) {
 179                 int filtered;
 180
 181                 delivered = 1;
 182                 switch (nexthdr) {
 183                 case IPPROTO_ICMPV6:
 184                         filtered = icmpv6_filter(sk, skb);
 185                         break;
 186
 187 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 188                 case IPPROTO_MH:
 189                 {
 190                         /* XXX: To validate MH only once for each packet,
 191                          * this is placed here. It should be after checking
 192                          * xfrm policy, however it doesn't. The checking xfrm
 193                          * policy is placed in rawv6_rcv() because it is
 194                          * required for each socket.
 195                          */
 196                         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         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                 struct ipv6hdr *ip6h = (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_dereference_raw(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.length - (skb_network_header(skb) -
 546                                                 skb->data);
 547         if (offset >= total_len - 1) {
 548                 err = -EINVAL;
 549                 ip6_flush_pending_frames(sk);
 550                 goto out;
 551         }
 552
 553         /* should be check HW csum miyazawa */
 554         if (skb_queue_len(&sk->sk_write_queue) == 1) {
 555                 /*
 556                  * Only one fragment on the socket.
 557                  */
 558                 tmp_csum = skb->csum;
 559         } else {
 560                 struct sk_buff *csum_skb = NULL;
 561                 tmp_csum = 0;
 562
 563                 skb_queue_walk(&sk->sk_write_queue, skb) {
 564                         tmp_csum = csum_add(tmp_csum, skb->csum);
 565
 566                         if (csum_skb)
 567                                 continue;
 568
 569                         len = skb->len - skb_transport_offset(skb);
 570                         if (offset >= len) {
 571                                 offset -= len;
 572                                 continue;
 573                         }
 574
 575                         csum_skb = skb;
 576                 }
 577
 578                 skb = csum_skb;
 579         }
 580
 581         offset += skb_transport_offset(skb);
 582         if (skb_copy_bits(skb, offset, &csum, 2))
 583                 BUG();
 584
 585         /* in case cksum was not initialized */
 586         if (unlikely(csum))
 587                 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
 588
 589         csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr,
 590                                total_len, fl6->flowi6_proto, tmp_csum);
 591
 592         if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP)
 593                 csum = CSUM_MANGLED_0;
 594
 595         if (skb_store_bits(skb, offset, &csum, 2))
 596                 BUG();
 597
 598 send:
 599         err = ip6_push_pending_frames(sk);
 600 out:
 601         return err;
 602 }
 603
 604 static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
 605                         struct flowi6 *fl6, struct dst_entry **dstp,
 606                         unsigned int flags)
 607 {
 608         struct ipv6_pinfo *np = inet6_sk(sk);
 609         struct ipv6hdr *iph;
 610         struct sk_buff *skb;
 611         int err;
 612         struct rt6_info *rt = (struct rt6_info *)*dstp;
 613
 614         if (length > rt->dst.dev->mtu) {
 615                 ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu);
 616                 return -EMSGSIZE;
 617         }
 618         if (flags&MSG_PROBE)
 619                 goto out;
 620
 621         skb = sock_alloc_send_skb(sk,
 622                                   length + LL_ALLOCATED_SPACE(rt->dst.dev) + 15,
 623                                   flags & MSG_DONTWAIT, &err);
 624         if (skb == NULL)
 625                 goto error;
 626         skb_reserve(skb, LL_RESERVED_SPACE(rt->dst.dev));
 627
 628         skb->priority = sk->sk_priority;
 629         skb->mark = sk->sk_mark;
 630         skb_dst_set(skb, &rt->dst);
 631         *dstp = NULL;
 632
 633         skb_put(skb, length);
 634         skb_reset_network_header(skb);
 635         iph = ipv6_hdr(skb);
 636
 637         skb->ip_summed = CHECKSUM_NONE;
 638
 639         skb->transport_header = skb->network_header;
 640         err = memcpy_fromiovecend((void *)iph, from, 0, length);
 641         if (err)
 642                 goto error_fault;
 643
 644         IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
 645         err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL,
 646                       rt->dst.dev, dst_output);
 647         if (err > 0)
 648                 err = net_xmit_errno(err);
 649         if (err)
 650                 goto error;
 651 out:
 652         return 0;
 653
 654 error_fault:
 655         err = -EFAULT;
 656         kfree_skb(skb);
 657 error:
 658         IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
 659         if (err == -ENOBUFS && !np->recverr)
 660                 err = 0;
 661         return err;
 662 }
 663
 664 static int rawv6_probe_proto_opt(struct flowi6 *fl6, struct msghdr *msg)
 665 {
 666         struct iovec *iov;
 667         u8 __user *type = NULL;
 668         u8 __user *code = NULL;
 669         u8 len = 0;
 670         int probed = 0;
 671         int i;
 672
 673         if (!msg->msg_iov)
 674                 return 0;
 675
 676         for (i = 0; i < msg->msg_iovlen; i++) {
 677                 iov = &msg->msg_iov[i];
 678                 if (!iov)
 679                         continue;
 680
 681                 switch (fl6->flowi6_proto) {
 682                 case IPPROTO_ICMPV6:
 683                         /* check if one-byte field is readable or not. */
 684                         if (iov->iov_base && iov->iov_len < 1)
 685                                 break;
 686
 687                         if (!type) {
 688                                 type = iov->iov_base;
 689                                 /* check if code field is readable or not. */
 690                                 if (iov->iov_len > 1)
 691                                         code = type + 1;
 692                         } else if (!code)
 693                                 code = iov->iov_base;
 694
 695                         if (type && code) {
 696                                 if (get_user(fl6->fl6_icmp_type, type) ||
 697                                     get_user(fl6->fl6_icmp_code, code))
 698                                         return -EFAULT;
 699                                 probed = 1;
 700                         }
 701                         break;
 702                 case IPPROTO_MH:
 703                         if (iov->iov_base && iov->iov_len < 1)
 704                                 break;
 705                         /* check if type field is readable or not. */
 706                         if (iov->iov_len > 2 - len) {
 707                                 u8 __user *p = iov->iov_base;
 708                                 if (get_user(fl6->fl6_mh_type, &p[2 - len]))
 709                                         return -EFAULT;
 710                                 probed = 1;
 711                         } else
 712                                 len += iov->iov_len;
 713
 714                         break;
 715                 default:
 716                         probed = 1;
 717                         break;
 718                 }
 719                 if (probed)
 720                         break;
 721         }
 722         return 0;
 723 }
 724
 725 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
 726                    struct msghdr *msg, size_t len)
 727 {
 728         struct ipv6_txoptions opt_space;
 729         struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
 730         struct in6_addr *daddr, *final_p, final;
 731         struct inet_sock *inet = inet_sk(sk);
 732         struct ipv6_pinfo *np = inet6_sk(sk);
 733         struct raw6_sock *rp = raw6_sk(sk);
 734         struct ipv6_txoptions *opt = NULL;
 735         struct ip6_flowlabel *flowlabel = NULL;
 736         struct dst_entry *dst = NULL;
 737         struct flowi6 fl6;
 738         int addr_len = msg->msg_namelen;
 739         int hlimit = -1;
 740         int tclass = -1;
 741         int dontfrag = -1;
 742         u16 proto;
 743         int err;
 744
 745         /* Rough check on arithmetic overflow,
 746            better check is made in ip6_append_data().
 747          */
 748         if (len > INT_MAX)
 749                 return -EMSGSIZE;
 750
 751         /* Mirror BSD error message compatibility */
 752         if (msg->msg_flags & MSG_OOB)
 753                 return -EOPNOTSUPP;
 754
 755         /*
 756          *      Get and verify the address.
 757          */
 758         memset(&fl6, 0, sizeof(fl6));
 759
 760         fl6.flowi6_mark = sk->sk_mark;
 761
 762         if (sin6) {
 763                 if (addr_len < SIN6_LEN_RFC2133)
 764                         return -EINVAL;
 765
 766                 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
 767                         return -EAFNOSUPPORT;
 768
 769                 /* port is the proto value [0..255] carried in nexthdr */
 770                 proto = ntohs(sin6->sin6_port);
 771
 772                 if (!proto)
 773                         proto = inet->inet_num;
 774                 else if (proto != inet->inet_num)
 775                         return -EINVAL;
 776
 777                 if (proto > 255)
 778                         return -EINVAL;
 779
 780                 daddr = &sin6->sin6_addr;
 781                 if (np->sndflow) {
 782                         fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
 783                         if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
 784                                 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
 785                                 if (flowlabel == NULL)
 786                                         return -EINVAL;
 787                                 daddr = &flowlabel->dst;
 788                         }
 789                 }
 790
 791                 /*
 792                  * Otherwise it will be difficult to maintain
 793                  * sk->sk_dst_cache.
 794                  */
 795                 if (sk->sk_state == TCP_ESTABLISHED &&
 796                     ipv6_addr_equal(daddr, &np->daddr))
 797                         daddr = &np->daddr;
 798
 799                 if (addr_len >= sizeof(struct sockaddr_in6) &&
 800                     sin6->sin6_scope_id &&
 801                     ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
 802                         fl6.flowi6_oif = sin6->sin6_scope_id;
 803         } else {
 804                 if (sk->sk_state != TCP_ESTABLISHED)
 805                         return -EDESTADDRREQ;
 806
 807                 proto = inet->inet_num;
 808                 daddr = &np->daddr;
 809                 fl6.flowlabel = np->flow_label;
 810         }
 811
 812         if (fl6.flowi6_oif == 0)
 813                 fl6.flowi6_oif = sk->sk_bound_dev_if;
 814
 815         if (msg->msg_controllen) {
 816                 opt = &opt_space;
 817                 memset(opt, 0, sizeof(struct ipv6_txoptions));
 818                 opt->tot_len = sizeof(struct ipv6_txoptions);
 819
 820                 err = datagram_send_ctl(sock_net(sk), msg, &fl6, opt, &hlimit,
 821                                         &tclass, &dontfrag);
 822                 if (err < 0) {
 823                         fl6_sock_release(flowlabel);
 824                         return err;
 825                 }
 826                 if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
 827                         flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
 828                         if (flowlabel == NULL)
 829                                 return -EINVAL;
 830                 }
 831                 if (!(opt->opt_nflen|opt->opt_flen))
 832                         opt = NULL;
 833         }
 834         if (opt == NULL)
 835                 opt = np->opt;
 836         if (flowlabel)
 837                 opt = fl6_merge_options(&opt_space, flowlabel, opt);
 838         opt = ipv6_fixup_options(&opt_space, opt);
 839
 840         fl6.flowi6_proto = proto;
 841         err = rawv6_probe_proto_opt(&fl6, msg);
 842         if (err)
 843                 goto out;
 844
 845         if (!ipv6_addr_any(daddr))
 846                 ipv6_addr_copy(&fl6.daddr, daddr);
 847         else
 848                 fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
 849         if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
 850                 ipv6_addr_copy(&fl6.saddr, &np->saddr);
 851
 852         final_p = fl6_update_dst(&fl6, opt, &final);
 853
 854         if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
 855                 fl6.flowi6_oif = np->mcast_oif;
 856         security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
 857
 858         dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true);
 859         if (IS_ERR(dst)) {
 860                 err = PTR_ERR(dst);
 861                 goto out;
 862         }
 863         if (hlimit < 0) {
 864                 if (ipv6_addr_is_multicast(&fl6.daddr))
 865                         hlimit = np->mcast_hops;
 866                 else
 867                         hlimit = np->hop_limit;
 868                 if (hlimit < 0)
 869                         hlimit = ip6_dst_hoplimit(dst);
 870         }
 871
 872         if (tclass < 0)
 873                 tclass = np->tclass;
 874
 875         if (dontfrag < 0)
 876                 dontfrag = np->dontfrag;
 877
 878         if (msg->msg_flags&MSG_CONFIRM)
 879                 goto do_confirm;
 880
 881 back_from_confirm:
 882         if (inet->hdrincl)
 883                 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl6, &dst, msg->msg_flags);
 884         else {
 885                 lock_sock(sk);
 886                 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
 887                         len, 0, hlimit, tclass, opt, &fl6, (struct rt6_info*)dst,
 888                         msg->msg_flags, dontfrag);
 889
 890                 if (err)
 891                         ip6_flush_pending_frames(sk);
 892                 else if (!(msg->msg_flags & MSG_MORE))
 893                         err = rawv6_push_pending_frames(sk, &fl6, rp);
 894                 release_sock(sk);
 895         }
 896 done:
 897         dst_release(dst);
 898 out:
 899         fl6_sock_release(flowlabel);
 900         return err<0?err:len;
 901 do_confirm:
 902         dst_confirm(dst);
 903         if (!(msg->msg_flags & MSG_PROBE) || len)
 904                 goto back_from_confirm;
 905         err = 0;
 906         goto done;
 907 }
 908
 909 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
 910                                char __user *optval, int optlen)
 911 {
 912         switch (optname) {
 913         case ICMPV6_FILTER:
 914                 if (optlen > sizeof(struct icmp6_filter))
 915                         optlen = sizeof(struct icmp6_filter);
 916                 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
 917                         return -EFAULT;
 918                 return 0;
 919         default:
 920                 return -ENOPROTOOPT;
 921         }
 922
 923         return 0;
 924 }
 925
 926 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
 927                                char __user *optval, int __user *optlen)
 928 {
 929         int len;
 930
 931         switch (optname) {
 932         case ICMPV6_FILTER:
 933                 if (get_user(len, optlen))
 934                         return -EFAULT;
 935                 if (len < 0)
 936                         return -EINVAL;
 937                 if (len > sizeof(struct icmp6_filter))
 938                         len = sizeof(struct icmp6_filter);
 939                 if (put_user(len, optlen))
 940                         return -EFAULT;
 941                 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
 942                         return -EFAULT;
 943                 return 0;
 944         default:
 945                 return -ENOPROTOOPT;
 946         }
 947
 948         return 0;
 949 }
 950
 951
 952 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
 953                             char __user *optval, unsigned int optlen)
 954 {
 955         struct raw6_sock *rp = raw6_sk(sk);
 956         int val;
 957
 958         if (get_user(val, (int __user *)optval))
 959                 return -EFAULT;
 960
 961         switch (optname) {
 962                 case IPV6_CHECKSUM:
 963                         if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
 964                             level == IPPROTO_IPV6) {
 965                                 /*
 966                                  * RFC3542 tells that IPV6_CHECKSUM socket
 967                                  * option in the IPPROTO_IPV6 level is not
 968                                  * allowed on ICMPv6 sockets.
 969                                  * If you want to set it, use IPPROTO_RAW
 970                                  * level IPV6_CHECKSUM socket option
 971                                  * (Linux extension).
 972                                  */
 973                                 return -EINVAL;
 974                         }
 975
 976                         /* You may get strange result with a positive odd offset;
 977                            RFC2292bis agrees with me. */
 978                         if (val > 0 && (val&1))
 979                                 return -EINVAL;
 980                         if (val < 0) {
 981                                 rp->checksum = 0;
 982                         } else {
 983                                 rp->checksum = 1;
 984                                 rp->offset = val;
 985                         }
 986
 987                         return 0;
 988                         break;
 989
 990                 default:
 991                         return -ENOPROTOOPT;
 992         }
 993 }
 994
 995 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
 996                           char __user *optval, unsigned int optlen)
 997 {
 998         switch(level) {
 999                 case SOL_RAW:
1000                         break;
1001
1002                 case SOL_ICMPV6:
1003                         if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1004                                 return -EOPNOTSUPP;
1005                         return rawv6_seticmpfilter(sk, level, optname, optval,
1006                                                    optlen);
1007                 case SOL_IPV6:
1008                         if (optname == IPV6_CHECKSUM)
1009                                 break;
1010                 default:
1011                         return ipv6_setsockopt(sk, level, optname, optval,
1012                                                optlen);
1013         }
1014
1015         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1016 }
1017
1018 #ifdef CONFIG_COMPAT
1019 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1020                                    char __user *optval, unsigned int optlen)
1021 {
1022         switch (level) {
1023         case SOL_RAW:
1024                 break;
1025         case SOL_ICMPV6:
1026                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1027                         return -EOPNOTSUPP;
1028                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1029         case SOL_IPV6:
1030                 if (optname == IPV6_CHECKSUM)
1031                         break;
1032         default:
1033                 return compat_ipv6_setsockopt(sk, level, optname,
1034                                               optval, optlen);
1035         }
1036         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1037 }
1038 #endif
1039
1040 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1041                             char __user *optval, int __user *optlen)
1042 {
1043         struct raw6_sock *rp = raw6_sk(sk);
1044         int val, len;
1045
1046         if (get_user(len,optlen))
1047                 return -EFAULT;
1048
1049         switch (optname) {
1050         case IPV6_CHECKSUM:
1051                 /*
1052                  * We allow getsockopt() for IPPROTO_IPV6-level
1053                  * IPV6_CHECKSUM socket option on ICMPv6 sockets
1054                  * since RFC3542 is silent about it.
1055                  */
1056                 if (rp->checksum == 0)
1057                         val = -1;
1058                 else
1059                         val = rp->offset;
1060                 break;
1061
1062         default:
1063                 return -ENOPROTOOPT;
1064         }
1065
1066         len = min_t(unsigned int, sizeof(int), len);
1067
1068         if (put_user(len, optlen))
1069                 return -EFAULT;
1070         if (copy_to_user(optval,&val,len))
1071                 return -EFAULT;
1072         return 0;
1073 }
1074
1075 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1076                           char __user *optval, int __user *optlen)
1077 {
1078         switch(level) {
1079                 case SOL_RAW:
1080                         break;
1081
1082                 case SOL_ICMPV6:
1083                         if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1084                                 return -EOPNOTSUPP;
1085                         return rawv6_geticmpfilter(sk, level, optname, optval,
1086                                                    optlen);
1087                 case SOL_IPV6:
1088                         if (optname == IPV6_CHECKSUM)
1089                                 break;
1090                 default:
1091                         return ipv6_getsockopt(sk, level, optname, optval,
1092                                                optlen);
1093         }
1094
1095         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1096 }
1097
1098 #ifdef CONFIG_COMPAT
1099 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1100                                    char __user *optval, int __user *optlen)
1101 {
1102         switch (level) {
1103         case SOL_RAW:
1104                 break;
1105         case SOL_ICMPV6:
1106                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1107                         return -EOPNOTSUPP;
1108                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1109         case SOL_IPV6:
1110                 if (optname == IPV6_CHECKSUM)
1111                         break;
1112         default:
1113                 return compat_ipv6_getsockopt(sk, level, optname,
1114                                               optval, optlen);
1115         }
1116         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1117 }
1118 #endif
1119
1120 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1121 {
1122         switch(cmd) {
1123                 case SIOCOUTQ:
1124                 {
1125                         int amount = sk_wmem_alloc_get(sk);
1126
1127                         return put_user(amount, (int __user *)arg);
1128                 }
1129                 case SIOCINQ:
1130                 {
1131                         struct sk_buff *skb;
1132                         int amount = 0;
1133
1134                         spin_lock_bh(&sk->sk_receive_queue.lock);
1135                         skb = skb_peek(&sk->sk_receive_queue);
1136                         if (skb != NULL)
1137                                 amount = skb->tail - skb->transport_header;
1138                         spin_unlock_bh(&sk->sk_receive_queue.lock);
1139                         return put_user(amount, (int __user *)arg);
1140                 }
1141
1142                 default:
1143 #ifdef CONFIG_IPV6_MROUTE
1144                         return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1145 #else
1146                         return -ENOIOCTLCMD;
1147 #endif
1148         }
1149 }
1150
1151 #ifdef CONFIG_COMPAT
1152 static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
1153 {
1154         switch (cmd) {
1155         case SIOCOUTQ:
1156         case SIOCINQ:
1157                 return -ENOIOCTLCMD;
1158         default:
1159 #ifdef CONFIG_IPV6_MROUTE
1160                 return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
1161 #else
1162                 return -ENOIOCTLCMD;
1163 #endif
1164         }
1165 }
1166 #endif
1167
1168 static void rawv6_close(struct sock *sk, long timeout)
1169 {
1170         if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1171                 ip6_ra_control(sk, -1);
1172         ip6mr_sk_done(sk);
1173         sk_common_release(sk);
1174 }
1175
1176 static void raw6_destroy(struct sock *sk)
1177 {
1178         lock_sock(sk);
1179         ip6_flush_pending_frames(sk);
1180         release_sock(sk);
1181
1182         inet6_destroy_sock(sk);
1183 }
1184
1185 static int rawv6_init_sk(struct sock *sk)
1186 {
1187         struct raw6_sock *rp = raw6_sk(sk);
1188
1189         switch (inet_sk(sk)->inet_num) {
1190         case IPPROTO_ICMPV6:
1191                 rp->checksum = 1;
1192                 rp->offset   = 2;
1193                 break;
1194         case IPPROTO_MH:
1195                 rp->checksum = 1;
1196                 rp->offset   = 4;
1197                 break;
1198         default:
1199                 break;
1200         }
1201         return 0;
1202 }
1203
1204 struct proto rawv6_prot = {
1205         .name              = "RAWv6",
1206         .owner             = THIS_MODULE,
1207         .close             = rawv6_close,
1208         .destroy           = raw6_destroy,
1209         .connect           = ip6_datagram_connect,
1210         .disconnect        = udp_disconnect,
1211         .ioctl             = rawv6_ioctl,
1212         .init              = rawv6_init_sk,
1213         .setsockopt        = rawv6_setsockopt,
1214         .getsockopt        = rawv6_getsockopt,
1215         .sendmsg           = rawv6_sendmsg,
1216         .recvmsg           = rawv6_recvmsg,
1217         .bind              = rawv6_bind,
1218         .backlog_rcv       = rawv6_rcv_skb,
1219         .hash              = raw_hash_sk,
1220         .unhash            = raw_unhash_sk,
1221         .obj_size          = sizeof(struct raw6_sock),
1222         .h.raw_hash        = &raw_v6_hashinfo,
1223 #ifdef CONFIG_COMPAT
1224         .compat_setsockopt = compat_rawv6_setsockopt,
1225         .compat_getsockopt = compat_rawv6_getsockopt,
1226         .compat_ioctl      = compat_rawv6_ioctl,
1227 #endif
1228 };
1229
1230 #ifdef CONFIG_PROC_FS
1231 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1232 {
1233         struct ipv6_pinfo *np = inet6_sk(sp);
1234         struct in6_addr *dest, *src;
1235         __u16 destp, srcp;
1236
1237         dest  = &np->daddr;
1238         src   = &np->rcv_saddr;
1239         destp = 0;
1240         srcp  = inet_sk(sp)->inet_num;
1241         seq_printf(seq,
1242                    "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1243                    "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
1244                    i,
1245                    src->s6_addr32[0], src->s6_addr32[1],
1246                    src->s6_addr32[2], src->s6_addr32[3], srcp,
1247                    dest->s6_addr32[0], dest->s6_addr32[1],
1248                    dest->s6_addr32[2], dest->s6_addr32[3], destp,
1249                    sp->sk_state,
1250                    sk_wmem_alloc_get(sp),
1251                    sk_rmem_alloc_get(sp),
1252                    0, 0L, 0,
1253                    sock_i_uid(sp), 0,
1254                    sock_i_ino(sp),
1255                    atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1256 }
1257
1258 static int raw6_seq_show(struct seq_file *seq, void *v)
1259 {
1260         if (v == SEQ_START_TOKEN)
1261                 seq_printf(seq,
1262                            "  sl  "
1263                            "local_address                         "
1264                            "remote_address                        "
1265                            "st tx_queue rx_queue tr tm->when retrnsmt"
1266                            "   uid  timeout inode ref pointer drops\n");
1267         else
1268                 raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1269         return 0;
1270 }
1271
1272 static const struct seq_operations raw6_seq_ops = {
1273         .start =        raw_seq_start,
1274         .next =         raw_seq_next,
1275         .stop =         raw_seq_stop,
1276         .show =         raw6_seq_show,
1277 };
1278
1279 static int raw6_seq_open(struct inode *inode, struct file *file)
1280 {
1281         return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1282 }
1283
1284 static const struct file_operations raw6_seq_fops = {
1285         .owner =        THIS_MODULE,
1286         .open =         raw6_seq_open,
1287         .read =         seq_read,
1288         .llseek =       seq_lseek,
1289         .release =      seq_release_net,
1290 };
1291
1292 static int __net_init raw6_init_net(struct net *net)
1293 {
1294         if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops))
1295                 return -ENOMEM;
1296
1297         return 0;
1298 }
1299
1300 static void __net_exit raw6_exit_net(struct net *net)
1301 {
1302         proc_net_remove(net, "raw6");
1303 }
1304
1305 static struct pernet_operations raw6_net_ops = {
1306         .init = raw6_init_net,
1307         .exit = raw6_exit_net,
1308 };
1309
1310 int __init raw6_proc_init(void)
1311 {
1312         return register_pernet_subsys(&raw6_net_ops);
1313 }
1314
1315 void raw6_proc_exit(void)
1316 {
1317         unregister_pernet_subsys(&raw6_net_ops);
1318 }
1319 #endif  /* CONFIG_PROC_FS */
1320
1321 /* Same as inet6_dgram_ops, sans udp_poll.  */
1322 static const struct proto_ops inet6_sockraw_ops = {
1323         .family            = PF_INET6,
1324         .owner             = THIS_MODULE,
1325         .release           = inet6_release,
1326         .bind              = inet6_bind,
1327         .connect           = inet_dgram_connect,        /* ok           */
1328         .socketpair        = sock_no_socketpair,        /* a do nothing */
1329         .accept            = sock_no_accept,            /* a do nothing */
1330         .getname           = inet6_getname,
1331         .poll              = datagram_poll,             /* ok           */
1332         .ioctl             = inet6_ioctl,               /* must change  */
1333         .listen            = sock_no_listen,            /* ok           */
1334         .shutdown          = inet_shutdown,             /* ok           */
1335         .setsockopt        = sock_common_setsockopt,    /* ok           */
1336         .getsockopt        = sock_common_getsockopt,    /* ok           */
1337         .sendmsg           = inet_sendmsg,              /* ok           */
1338         .recvmsg           = sock_common_recvmsg,       /* ok           */
1339         .mmap              = sock_no_mmap,
1340         .sendpage          = sock_no_sendpage,
1341 #ifdef CONFIG_COMPAT
1342         .compat_setsockopt = compat_sock_common_setsockopt,
1343         .compat_getsockopt = compat_sock_common_getsockopt,
1344 #endif
1345 };
1346
1347 static struct inet_protosw rawv6_protosw = {
1348         .type           = SOCK_RAW,
1349         .protocol       = IPPROTO_IP,   /* wild card */
1350         .prot           = &rawv6_prot,
1351         .ops            = &inet6_sockraw_ops,
1352         .no_check       = UDP_CSUM_DEFAULT,
1353         .flags          = INET_PROTOSW_REUSE,
1354 };
1355
1356 int __init rawv6_init(void)
1357 {
1358         int ret;
1359
1360         ret = inet6_register_protosw(&rawv6_protosw);
1361         if (ret)
1362                 goto out;
1363 out:
1364         return ret;
1365 }
1366
1367 void rawv6_exit(void)
1368 {
1369         inet6_unregister_protosw(&rawv6_protosw);
1370 }