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/sockios.h>
  25 #include <linux/net.h>
  26 #include <linux/in6.h>
  27 #include <linux/netdevice.h>
  28 #include <linux/if_arp.h>
  29 #include <linux/icmpv6.h>
  30 #include <linux/netfilter.h>
  31 #include <linux/netfilter_ipv6.h>
  32 #include <linux/skbuff.h>
  33 #include <asm/uaccess.h>
  34 #include <asm/ioctls.h>
  35
  36 #include <net/net_namespace.h>
  37 #include <net/ip.h>
  38 #include <net/sock.h>
  39 #include <net/snmp.h>
  40
  41 #include <net/ipv6.h>
  42 #include <net/ndisc.h>
  43 #include <net/protocol.h>
  44 #include <net/ip6_route.h>
  45 #include <net/ip6_checksum.h>
  46 #include <net/addrconf.h>
  47 #include <net/transp_v6.h>
  48 #include <net/udp.h>
  49 #include <net/inet_common.h>
  50 #include <net/tcp_states.h>
  51 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
  52 #include <net/mip6.h>
  53 #endif
  54 #include <linux/mroute6.h>
  55
  56 #include <net/raw.h>
  57 #include <net/rawv6.h>
  58 #include <net/xfrm.h>
  59
  60 #include <linux/proc_fs.h>
  61 #include <linux/seq_file.h>
  62
  63 static struct raw_hashinfo raw_v6_hashinfo = {
  64         .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
  65 };
  66
  67 static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
  68                 unsigned short num, struct in6_addr *loc_addr,
  69                 struct in6_addr *rmt_addr, int dif)
  70 {
  71         struct hlist_node *node;
  72         int is_multicast = ipv6_addr_is_multicast(loc_addr);
  73
  74         sk_for_each_from(sk, node)
  75                 if (inet_sk(sk)->num == num) {
  76                         struct ipv6_pinfo *np = inet6_sk(sk);
  77
  78                         if (!net_eq(sock_net(sk), net))
  79                                 continue;
  80
  81                         if (!ipv6_addr_any(&np->daddr) &&
  82                             !ipv6_addr_equal(&np->daddr, rmt_addr))
  83                                 continue;
  84
  85                         if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
  86                                 continue;
  87
  88                         if (!ipv6_addr_any(&np->rcv_saddr)) {
  89                                 if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
  90                                         goto found;
  91                                 if (is_multicast &&
  92                                     inet6_mc_check(sk, loc_addr, rmt_addr))
  93                                         goto found;
  94                                 continue;
  95                         }
  96                         goto found;
  97                 }
  98         sk = NULL;
  99 found:
 100         return sk;
 101 }
 102
 103 /*
 104  *      0 - deliver
 105  *      1 - block
 106  */
 107 static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
 108 {
 109         struct icmp6hdr *icmph;
 110         struct raw6_sock *rp = raw6_sk(sk);
 111
 112         if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) {
 113                 __u32 *data = &rp->filter.data[0];
 114                 int bit_nr;
 115
 116                 icmph = (struct icmp6hdr *) skb->data;
 117                 bit_nr = icmph->icmp6_type;
 118
 119                 return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0;
 120         }
 121         return 0;
 122 }
 123
 124 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 125 static int (*mh_filter)(struct sock *sock, struct sk_buff *skb);
 126
 127 int rawv6_mh_filter_register(int (*filter)(struct sock *sock,
 128                                            struct sk_buff *skb))
 129 {
 130         rcu_assign_pointer(mh_filter, filter);
 131         return 0;
 132 }
 133 EXPORT_SYMBOL(rawv6_mh_filter_register);
 134
 135 int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock,
 136                                              struct sk_buff *skb))
 137 {
 138         rcu_assign_pointer(mh_filter, NULL);
 139         synchronize_rcu();
 140         return 0;
 141 }
 142 EXPORT_SYMBOL(rawv6_mh_filter_unregister);
 143
 144 #endif
 145
 146 /*
 147  *      demultiplex raw sockets.
 148  *      (should consider queueing the skb in the sock receive_queue
 149  *      without calling rawv6.c)
 150  *
 151  *      Caller owns SKB so we must make clones.
 152  */
 153 static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
 154 {
 155         struct in6_addr *saddr;
 156         struct in6_addr *daddr;
 157         struct sock *sk;
 158         int delivered = 0;
 159         __u8 hash;
 160         struct net *net;
 161
 162         saddr = &ipv6_hdr(skb)->saddr;
 163         daddr = saddr + 1;
 164
 165         hash = nexthdr & (MAX_INET_PROTOS - 1);
 166
 167         read_lock(&raw_v6_hashinfo.lock);
 168         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 169
 170         if (sk == NULL)
 171                 goto out;
 172
 173         net = dev_net(skb->dev);
 174         sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
 175
 176         while (sk) {
 177                 int filtered;
 178
 179                 delivered = 1;
 180                 switch (nexthdr) {
 181                 case IPPROTO_ICMPV6:
 182                         filtered = icmpv6_filter(sk, skb);
 183                         break;
 184
 185 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 186                 case IPPROTO_MH:
 187                 {
 188                         /* XXX: To validate MH only once for each packet,
 189                          * this is placed here. It should be after checking
 190                          * xfrm policy, however it doesn't. The checking xfrm
 191                          * policy is placed in rawv6_rcv() because it is
 192                          * required for each socket.
 193                          */
 194                         int (*filter)(struct sock *sock, struct sk_buff *skb);
 195
 196                         filter = rcu_dereference(mh_filter);
 197                         filtered = filter ? filter(sk, skb) : 0;
 198                         break;
 199                 }
 200 #endif
 201                 default:
 202                         filtered = 0;
 203                         break;
 204                 }
 205
 206                 if (filtered < 0)
 207                         break;
 208                 if (filtered == 0) {
 209                         struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
 210
 211                         /* Not releasing hash table! */
 212                         if (clone) {
 213                                 nf_reset(clone);
 214                                 rawv6_rcv(sk, clone);
 215                         }
 216                 }
 217                 sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
 218                                      IP6CB(skb)->iif);
 219         }
 220 out:
 221         read_unlock(&raw_v6_hashinfo.lock);
 222         return delivered;
 223 }
 224
 225 int raw6_local_deliver(struct sk_buff *skb, int nexthdr)
 226 {
 227         struct sock *raw_sk;
 228
 229         raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]);
 230         if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
 231                 raw_sk = NULL;
 232
 233         return raw_sk != NULL;
 234 }
 235
 236 /* This cleans up af_inet6 a bit. -DaveM */
 237 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 238 {
 239         struct inet_sock *inet = inet_sk(sk);
 240         struct ipv6_pinfo *np = inet6_sk(sk);
 241         struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
 242         __be32 v4addr = 0;
 243         int addr_type;
 244         int err;
 245
 246         if (addr_len < SIN6_LEN_RFC2133)
 247                 return -EINVAL;
 248         addr_type = ipv6_addr_type(&addr->sin6_addr);
 249
 250         /* Raw sockets are IPv6 only */
 251         if (addr_type == IPV6_ADDR_MAPPED)
 252                 return(-EADDRNOTAVAIL);
 253
 254         lock_sock(sk);
 255
 256         err = -EINVAL;
 257         if (sk->sk_state != TCP_CLOSE)
 258                 goto out;
 259
 260         /* Check if the address belongs to the host. */
 261         if (addr_type != IPV6_ADDR_ANY) {
 262                 struct net_device *dev = NULL;
 263
 264                 if (addr_type & IPV6_ADDR_LINKLOCAL) {
 265                         if (addr_len >= sizeof(struct sockaddr_in6) &&
 266                             addr->sin6_scope_id) {
 267                                 /* Override any existing binding, if another
 268                                  * one is supplied by user.
 269                                  */
 270                                 sk->sk_bound_dev_if = addr->sin6_scope_id;
 271                         }
 272
 273                         /* Binding to link-local address requires an interface */
 274                         if (!sk->sk_bound_dev_if)
 275                                 goto out;
 276
 277                         dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if);
 278                         if (!dev) {
 279                                 err = -ENODEV;
 280                                 goto out;
 281                         }
 282                 }
 283
 284                 /* ipv4 addr of the socket is invalid.  Only the
 285                  * unspecified and mapped address have a v4 equivalent.
 286                  */
 287                 v4addr = LOOPBACK4_IPV6;
 288                 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
 289                         err = -EADDRNOTAVAIL;
 290                         if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
 291                                            dev, 0)) {
 292                                 if (dev)
 293                                         dev_put(dev);
 294                                 goto out;
 295                         }
 296                 }
 297                 if (dev)
 298                         dev_put(dev);
 299         }
 300
 301         inet->rcv_saddr = inet->saddr = v4addr;
 302         ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
 303         if (!(addr_type & IPV6_ADDR_MULTICAST))
 304                 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
 305         err = 0;
 306 out:
 307         release_sock(sk);
 308         return err;
 309 }
 310
 311 static void rawv6_err(struct sock *sk, struct sk_buff *skb,
 312                struct inet6_skb_parm *opt,
 313                int type, int code, int offset, __be32 info)
 314 {
 315         struct inet_sock *inet = inet_sk(sk);
 316         struct ipv6_pinfo *np = inet6_sk(sk);
 317         int err;
 318         int harderr;
 319
 320         /* Report error on raw socket, if:
 321            1. User requested recverr.
 322            2. Socket is connected (otherwise the error indication
 323               is useless without recverr and error is hard.
 324          */
 325         if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
 326                 return;
 327
 328         harderr = icmpv6_err_convert(type, code, &err);
 329         if (type == ICMPV6_PKT_TOOBIG)
 330                 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
 331
 332         if (np->recverr) {
 333                 u8 *payload = skb->data;
 334                 if (!inet->hdrincl)
 335                         payload += offset;
 336                 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
 337         }
 338
 339         if (np->recverr || harderr) {
 340                 sk->sk_err = err;
 341                 sk->sk_error_report(sk);
 342         }
 343 }
 344
 345 void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
 346                 int type, int code, int inner_offset, __be32 info)
 347 {
 348         struct sock *sk;
 349         int hash;
 350         struct in6_addr *saddr, *daddr;
 351         struct net *net;
 352
 353         hash = nexthdr & (RAW_HTABLE_SIZE - 1);
 354
 355         read_lock(&raw_v6_hashinfo.lock);
 356         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 357         if (sk != NULL) {
 358                 /* Note: ipv6_hdr(skb) != skb->data */
 359                 struct ipv6hdr *ip6h = (struct ipv6hdr *)skb->data;
 360                 saddr = &ip6h->saddr;
 361                 daddr = &ip6h->daddr;
 362                 net = dev_net(skb->dev);
 363
 364                 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
 365                                                 IP6CB(skb)->iif))) {
 366                         rawv6_err(sk, skb, NULL, type, code,
 367                                         inner_offset, info);
 368                         sk = sk_next(sk);
 369                 }
 370         }
 371         read_unlock(&raw_v6_hashinfo.lock);
 372 }
 373
 374 static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
 375 {
 376         if ((raw6_sk(sk)->checksum || sk->sk_filter) &&
 377             skb_checksum_complete(skb)) {
 378                 atomic_inc(&sk->sk_drops);
 379                 kfree_skb(skb);
 380                 return NET_RX_DROP;
 381         }
 382
 383         /* Charge it to the socket. */
 384         if (sock_queue_rcv_skb(sk,skb)<0) {
 385                 atomic_inc(&sk->sk_drops);
 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->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->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         skb = skb_recv_datagram(sk, flags, noblock, &err);
 466         if (!skb)
 467                 goto out;
 468
 469         copied = skb->len;
 470         if (copied > len) {
 471                 copied = len;
 472                 msg->msg_flags |= MSG_TRUNC;
 473         }
 474
 475         if (skb_csum_unnecessary(skb)) {
 476                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 477         } else if (msg->msg_flags&MSG_TRUNC) {
 478                 if (__skb_checksum_complete(skb))
 479                         goto csum_copy_err;
 480                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 481         } else {
 482                 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
 483                 if (err == -EINVAL)
 484                         goto csum_copy_err;
 485         }
 486         if (err)
 487                 goto out_free;
 488
 489         /* Copy the address. */
 490         if (sin6) {
 491                 sin6->sin6_family = AF_INET6;
 492                 sin6->sin6_port = 0;
 493                 ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr);
 494                 sin6->sin6_flowinfo = 0;
 495                 sin6->sin6_scope_id = 0;
 496                 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
 497                         sin6->sin6_scope_id = IP6CB(skb)->iif;
 498         }
 499
 500         sock_recv_timestamp(msg, sk, skb);
 501
 502         if (np->rxopt.all)
 503                 datagram_recv_ctl(sk, msg, skb);
 504
 505         err = copied;
 506         if (flags & MSG_TRUNC)
 507                 err = skb->len;
 508
 509 out_free:
 510         skb_free_datagram(sk, skb);
 511 out:
 512         return err;
 513
 514 csum_copy_err:
 515         skb_kill_datagram(sk, skb, flags);
 516
 517         /* Error for blocking case is chosen to masquerade
 518            as some normal condition.
 519          */
 520         err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
 521         atomic_inc(&sk->sk_drops);
 522         goto out;
 523 }
 524
 525 static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
 526                                      struct raw6_sock *rp)
 527 {
 528         struct sk_buff *skb;
 529         int err = 0;
 530         int offset;
 531         int len;
 532         int total_len;
 533         __wsum tmp_csum;
 534         __sum16 csum;
 535
 536         if (!rp->checksum)
 537                 goto send;
 538
 539         if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
 540                 goto out;
 541
 542         offset = rp->offset;
 543         total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) -
 544                                                 skb->data);
 545         if (offset >= total_len - 1) {
 546                 err = -EINVAL;
 547                 ip6_flush_pending_frames(sk);
 548                 goto out;
 549         }
 550
 551         /* should be check HW csum miyazawa */
 552         if (skb_queue_len(&sk->sk_write_queue) == 1) {
 553                 /*
 554                  * Only one fragment on the socket.
 555                  */
 556                 tmp_csum = skb->csum;
 557         } else {
 558                 struct sk_buff *csum_skb = NULL;
 559                 tmp_csum = 0;
 560
 561                 skb_queue_walk(&sk->sk_write_queue, skb) {
 562                         tmp_csum = csum_add(tmp_csum, skb->csum);
 563
 564                         if (csum_skb)
 565                                 continue;
 566
 567                         len = skb->len - skb_transport_offset(skb);
 568                         if (offset >= len) {
 569                                 offset -= len;
 570                                 continue;
 571                         }
 572
 573                         csum_skb = skb;
 574                 }
 575
 576                 skb = csum_skb;
 577         }
 578
 579         offset += skb_transport_offset(skb);
 580         if (skb_copy_bits(skb, offset, &csum, 2))
 581                 BUG();
 582
 583         /* in case cksum was not initialized */
 584         if (unlikely(csum))
 585                 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
 586
 587         csum = csum_ipv6_magic(&fl->fl6_src,
 588                                    &fl->fl6_dst,
 589                                    total_len, fl->proto, tmp_csum);
 590
 591         if (csum == 0 && fl->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 flowi *fl, struct rt6_info *rt,
 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
 612         if (length > rt->u.dst.dev->mtu) {
 613                 ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
 614                 return -EMSGSIZE;
 615         }
 616         if (flags&MSG_PROBE)
 617                 goto out;
 618
 619         skb = sock_alloc_send_skb(sk,
 620                                   length + LL_ALLOCATED_SPACE(rt->u.dst.dev) + 15,
 621                                   flags & MSG_DONTWAIT, &err);
 622         if (skb == NULL)
 623                 goto error;
 624         skb_reserve(skb, LL_RESERVED_SPACE(rt->u.dst.dev));
 625
 626         skb->priority = sk->sk_priority;
 627         skb->mark = sk->sk_mark;
 628         skb->dst = dst_clone(&rt->u.dst);
 629
 630         skb_put(skb, length);
 631         skb_reset_network_header(skb);
 632         iph = ipv6_hdr(skb);
 633
 634         skb->ip_summed = CHECKSUM_NONE;
 635
 636         skb->transport_header = skb->network_header;
 637         err = memcpy_fromiovecend((void *)iph, from, 0, length);
 638         if (err)
 639                 goto error_fault;
 640
 641         IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS);
 642         err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
 643                       dst_output);
 644         if (err > 0)
 645                 err = np->recverr ? net_xmit_errno(err) : 0;
 646         if (err)
 647                 goto error;
 648 out:
 649         return 0;
 650
 651 error_fault:
 652         err = -EFAULT;
 653         kfree_skb(skb);
 654 error:
 655         IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
 656         return err;
 657 }
 658
 659 static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
 660 {
 661         struct iovec *iov;
 662         u8 __user *type = NULL;
 663         u8 __user *code = NULL;
 664         u8 len = 0;
 665         int probed = 0;
 666         int i;
 667
 668         if (!msg->msg_iov)
 669                 return 0;
 670
 671         for (i = 0; i < msg->msg_iovlen; i++) {
 672                 iov = &msg->msg_iov[i];
 673                 if (!iov)
 674                         continue;
 675
 676                 switch (fl->proto) {
 677                 case IPPROTO_ICMPV6:
 678                         /* check if one-byte field is readable or not. */
 679                         if (iov->iov_base && iov->iov_len < 1)
 680                                 break;
 681
 682                         if (!type) {
 683                                 type = iov->iov_base;
 684                                 /* check if code field is readable or not. */
 685                                 if (iov->iov_len > 1)
 686                                         code = type + 1;
 687                         } else if (!code)
 688                                 code = iov->iov_base;
 689
 690                         if (type && code) {
 691                                 if (get_user(fl->fl_icmp_type, type) ||
 692                                     get_user(fl->fl_icmp_code, code))
 693                                         return -EFAULT;
 694                                 probed = 1;
 695                         }
 696                         break;
 697                 case IPPROTO_MH:
 698                         if (iov->iov_base && iov->iov_len < 1)
 699                                 break;
 700                         /* check if type field is readable or not. */
 701                         if (iov->iov_len > 2 - len) {
 702                                 u8 __user *p = iov->iov_base;
 703                                 if (get_user(fl->fl_mh_type, &p[2 - len]))
 704                                         return -EFAULT;
 705                                 probed = 1;
 706                         } else
 707                                 len += iov->iov_len;
 708
 709                         break;
 710                 default:
 711                         probed = 1;
 712                         break;
 713                 }
 714                 if (probed)
 715                         break;
 716         }
 717         return 0;
 718 }
 719
 720 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
 721                    struct msghdr *msg, size_t len)
 722 {
 723         struct ipv6_txoptions opt_space;
 724         struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
 725         struct in6_addr *daddr, *final_p = NULL, final;
 726         struct inet_sock *inet = inet_sk(sk);
 727         struct ipv6_pinfo *np = inet6_sk(sk);
 728         struct raw6_sock *rp = raw6_sk(sk);
 729         struct ipv6_txoptions *opt = NULL;
 730         struct ip6_flowlabel *flowlabel = NULL;
 731         struct dst_entry *dst = NULL;
 732         struct flowi fl;
 733         int addr_len = msg->msg_namelen;
 734         int hlimit = -1;
 735         int tclass = -1;
 736         u16 proto;
 737         int err;
 738
 739         /* Rough check on arithmetic overflow,
 740            better check is made in ip6_append_data().
 741          */
 742         if (len > INT_MAX)
 743                 return -EMSGSIZE;
 744
 745         /* Mirror BSD error message compatibility */
 746         if (msg->msg_flags & MSG_OOB)
 747                 return -EOPNOTSUPP;
 748
 749         /*
 750          *      Get and verify the address.
 751          */
 752         memset(&fl, 0, sizeof(fl));
 753
 754         fl.mark = sk->sk_mark;
 755
 756         if (sin6) {
 757                 if (addr_len < SIN6_LEN_RFC2133)
 758                         return -EINVAL;
 759
 760                 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
 761                         return(-EAFNOSUPPORT);
 762
 763                 /* port is the proto value [0..255] carried in nexthdr */
 764                 proto = ntohs(sin6->sin6_port);
 765
 766                 if (!proto)
 767                         proto = inet->num;
 768                 else if (proto != inet->num)
 769                         return(-EINVAL);
 770
 771                 if (proto > 255)
 772                         return(-EINVAL);
 773
 774                 daddr = &sin6->sin6_addr;
 775                 if (np->sndflow) {
 776                         fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
 777                         if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
 778                                 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
 779                                 if (flowlabel == NULL)
 780                                         return -EINVAL;
 781                                 daddr = &flowlabel->dst;
 782                         }
 783                 }
 784
 785                 /*
 786                  * Otherwise it will be difficult to maintain
 787                  * sk->sk_dst_cache.
 788                  */
 789                 if (sk->sk_state == TCP_ESTABLISHED &&
 790                     ipv6_addr_equal(daddr, &np->daddr))
 791                         daddr = &np->daddr;
 792
 793                 if (addr_len >= sizeof(struct sockaddr_in6) &&
 794                     sin6->sin6_scope_id &&
 795                     ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
 796                         fl.oif = sin6->sin6_scope_id;
 797         } else {
 798                 if (sk->sk_state != TCP_ESTABLISHED)
 799                         return -EDESTADDRREQ;
 800
 801                 proto = inet->num;
 802                 daddr = &np->daddr;
 803                 fl.fl6_flowlabel = np->flow_label;
 804         }
 805
 806         if (fl.oif == 0)
 807                 fl.oif = sk->sk_bound_dev_if;
 808
 809         if (msg->msg_controllen) {
 810                 opt = &opt_space;
 811                 memset(opt, 0, sizeof(struct ipv6_txoptions));
 812                 opt->tot_len = sizeof(struct ipv6_txoptions);
 813
 814                 err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass);
 815                 if (err < 0) {
 816                         fl6_sock_release(flowlabel);
 817                         return err;
 818                 }
 819                 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
 820                         flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
 821                         if (flowlabel == NULL)
 822                                 return -EINVAL;
 823                 }
 824                 if (!(opt->opt_nflen|opt->opt_flen))
 825                         opt = NULL;
 826         }
 827         if (opt == NULL)
 828                 opt = np->opt;
 829         if (flowlabel)
 830                 opt = fl6_merge_options(&opt_space, flowlabel, opt);
 831         opt = ipv6_fixup_options(&opt_space, opt);
 832
 833         fl.proto = proto;
 834         err = rawv6_probe_proto_opt(&fl, msg);
 835         if (err)
 836                 goto out;
 837
 838         if (!ipv6_addr_any(daddr))
 839                 ipv6_addr_copy(&fl.fl6_dst, daddr);
 840         else
 841                 fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
 842         if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
 843                 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
 844
 845         /* merge ip6_build_xmit from ip6_output */
 846         if (opt && opt->srcrt) {
 847                 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
 848                 ipv6_addr_copy(&final, &fl.fl6_dst);
 849                 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
 850                 final_p = &final;
 851         }
 852
 853         if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
 854                 fl.oif = np->mcast_oif;
 855         security_sk_classify_flow(sk, &fl);
 856
 857         err = ip6_dst_lookup(sk, &dst, &fl);
 858         if (err)
 859                 goto out;
 860         if (final_p)
 861                 ipv6_addr_copy(&fl.fl6_dst, final_p);
 862
 863         err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT);
 864         if (err < 0) {
 865                 if (err == -EREMOTE)
 866                         err = ip6_dst_blackhole(sk, &dst, &fl);
 867                 if (err < 0)
 868                         goto out;
 869         }
 870
 871         if (hlimit < 0) {
 872                 if (ipv6_addr_is_multicast(&fl.fl6_dst))
 873                         hlimit = np->mcast_hops;
 874                 else
 875                         hlimit = np->hop_limit;
 876                 if (hlimit < 0)
 877                         hlimit = ip6_dst_hoplimit(dst);
 878         }
 879
 880         if (tclass < 0) {
 881                 tclass = np->tclass;
 882                 if (tclass < 0)
 883                         tclass = 0;
 884         }
 885
 886         if (msg->msg_flags&MSG_CONFIRM)
 887                 goto do_confirm;
 888
 889 back_from_confirm:
 890         if (inet->hdrincl) {
 891                 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
 892         } else {
 893                 lock_sock(sk);
 894                 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
 895                         len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
 896                         msg->msg_flags);
 897
 898                 if (err)
 899                         ip6_flush_pending_frames(sk);
 900                 else if (!(msg->msg_flags & MSG_MORE))
 901                         err = rawv6_push_pending_frames(sk, &fl, rp);
 902                 release_sock(sk);
 903         }
 904 done:
 905         dst_release(dst);
 906 out:
 907         fl6_sock_release(flowlabel);
 908         return err<0?err:len;
 909 do_confirm:
 910         dst_confirm(dst);
 911         if (!(msg->msg_flags & MSG_PROBE) || len)
 912                 goto back_from_confirm;
 913         err = 0;
 914         goto done;
 915 }
 916
 917 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
 918                                char __user *optval, int optlen)
 919 {
 920         switch (optname) {
 921         case ICMPV6_FILTER:
 922                 if (optlen > sizeof(struct icmp6_filter))
 923                         optlen = sizeof(struct icmp6_filter);
 924                 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
 925                         return -EFAULT;
 926                 return 0;
 927         default:
 928                 return -ENOPROTOOPT;
 929         }
 930
 931         return 0;
 932 }
 933
 934 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
 935                                char __user *optval, int __user *optlen)
 936 {
 937         int len;
 938
 939         switch (optname) {
 940         case ICMPV6_FILTER:
 941                 if (get_user(len, optlen))
 942                         return -EFAULT;
 943                 if (len < 0)
 944                         return -EINVAL;
 945                 if (len > sizeof(struct icmp6_filter))
 946                         len = sizeof(struct icmp6_filter);
 947                 if (put_user(len, optlen))
 948                         return -EFAULT;
 949                 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
 950                         return -EFAULT;
 951                 return 0;
 952         default:
 953                 return -ENOPROTOOPT;
 954         }
 955
 956         return 0;
 957 }
 958
 959
 960 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
 961                             char __user *optval, int optlen)
 962 {
 963         struct raw6_sock *rp = raw6_sk(sk);
 964         int val;
 965
 966         if (get_user(val, (int __user *)optval))
 967                 return -EFAULT;
 968
 969         switch (optname) {
 970                 case IPV6_CHECKSUM:
 971                         if (inet_sk(sk)->num == IPPROTO_ICMPV6 &&
 972                             level == IPPROTO_IPV6) {
 973                                 /*
 974                                  * RFC3542 tells that IPV6_CHECKSUM socket
 975                                  * option in the IPPROTO_IPV6 level is not
 976                                  * allowed on ICMPv6 sockets.
 977                                  * If you want to set it, use IPPROTO_RAW
 978                                  * level IPV6_CHECKSUM socket option
 979                                  * (Linux extension).
 980                                  */
 981                                 return -EINVAL;
 982                         }
 983
 984                         /* You may get strange result with a positive odd offset;
 985                            RFC2292bis agrees with me. */
 986                         if (val > 0 && (val&1))
 987                                 return(-EINVAL);
 988                         if (val < 0) {
 989                                 rp->checksum = 0;
 990                         } else {
 991                                 rp->checksum = 1;
 992                                 rp->offset = val;
 993                         }
 994
 995                         return 0;
 996                         break;
 997
 998                 default:
 999                         return(-ENOPROTOOPT);
1000         }
1001 }
1002
1003 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1004                           char __user *optval, int optlen)
1005 {
1006         switch(level) {
1007                 case SOL_RAW:
1008                         break;
1009
1010                 case SOL_ICMPV6:
1011                         if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1012                                 return -EOPNOTSUPP;
1013                         return rawv6_seticmpfilter(sk, level, optname, optval,
1014                                                    optlen);
1015                 case SOL_IPV6:
1016                         if (optname == IPV6_CHECKSUM)
1017                                 break;
1018                 default:
1019                         return ipv6_setsockopt(sk, level, optname, optval,
1020                                                optlen);
1021         }
1022
1023         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1024 }
1025
1026 #ifdef CONFIG_COMPAT
1027 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1028                                    char __user *optval, int optlen)
1029 {
1030         switch (level) {
1031         case SOL_RAW:
1032                 break;
1033         case SOL_ICMPV6:
1034                 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1035                         return -EOPNOTSUPP;
1036                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1037         case SOL_IPV6:
1038                 if (optname == IPV6_CHECKSUM)
1039                         break;
1040         default:
1041                 return compat_ipv6_setsockopt(sk, level, optname,
1042                                               optval, optlen);
1043         }
1044         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1045 }
1046 #endif
1047
1048 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1049                             char __user *optval, int __user *optlen)
1050 {
1051         struct raw6_sock *rp = raw6_sk(sk);
1052         int val, len;
1053
1054         if (get_user(len,optlen))
1055                 return -EFAULT;
1056
1057         switch (optname) {
1058         case IPV6_CHECKSUM:
1059                 /*
1060                  * We allow getsockopt() for IPPROTO_IPV6-level
1061                  * IPV6_CHECKSUM socket option on ICMPv6 sockets
1062                  * since RFC3542 is silent about it.
1063                  */
1064                 if (rp->checksum == 0)
1065                         val = -1;
1066                 else
1067                         val = rp->offset;
1068                 break;
1069
1070         default:
1071                 return -ENOPROTOOPT;
1072         }
1073
1074         len = min_t(unsigned int, sizeof(int), len);
1075
1076         if (put_user(len, optlen))
1077                 return -EFAULT;
1078         if (copy_to_user(optval,&val,len))
1079                 return -EFAULT;
1080         return 0;
1081 }
1082
1083 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1084                           char __user *optval, int __user *optlen)
1085 {
1086         switch(level) {
1087                 case SOL_RAW:
1088                         break;
1089
1090                 case SOL_ICMPV6:
1091                         if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1092                                 return -EOPNOTSUPP;
1093                         return rawv6_geticmpfilter(sk, level, optname, optval,
1094                                                    optlen);
1095                 case SOL_IPV6:
1096                         if (optname == IPV6_CHECKSUM)
1097                                 break;
1098                 default:
1099                         return ipv6_getsockopt(sk, level, optname, optval,
1100                                                optlen);
1101         }
1102
1103         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1104 }
1105
1106 #ifdef CONFIG_COMPAT
1107 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1108                                    char __user *optval, int __user *optlen)
1109 {
1110         switch (level) {
1111         case SOL_RAW:
1112                 break;
1113         case SOL_ICMPV6:
1114                 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1115                         return -EOPNOTSUPP;
1116                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1117         case SOL_IPV6:
1118                 if (optname == IPV6_CHECKSUM)
1119                         break;
1120         default:
1121                 return compat_ipv6_getsockopt(sk, level, optname,
1122                                               optval, optlen);
1123         }
1124         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1125 }
1126 #endif
1127
1128 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1129 {
1130         switch(cmd) {
1131                 case SIOCOUTQ:
1132                 {
1133                         int amount = atomic_read(&sk->sk_wmem_alloc);
1134                         return put_user(amount, (int __user *)arg);
1135                 }
1136                 case SIOCINQ:
1137                 {
1138                         struct sk_buff *skb;
1139                         int amount = 0;
1140
1141                         spin_lock_bh(&sk->sk_receive_queue.lock);
1142                         skb = skb_peek(&sk->sk_receive_queue);
1143                         if (skb != NULL)
1144                                 amount = skb->tail - skb->transport_header;
1145                         spin_unlock_bh(&sk->sk_receive_queue.lock);
1146                         return put_user(amount, (int __user *)arg);
1147                 }
1148
1149                 default:
1150 #ifdef CONFIG_IPV6_MROUTE
1151                         return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1152 #else
1153                         return -ENOIOCTLCMD;
1154 #endif
1155         }
1156 }
1157
1158 static void rawv6_close(struct sock *sk, long timeout)
1159 {
1160         if (inet_sk(sk)->num == IPPROTO_RAW)
1161                 ip6_ra_control(sk, -1);
1162         ip6mr_sk_done(sk);
1163         sk_common_release(sk);
1164 }
1165
1166 static void raw6_destroy(struct sock *sk)
1167 {
1168         lock_sock(sk);
1169         ip6_flush_pending_frames(sk);
1170         release_sock(sk);
1171
1172         inet6_destroy_sock(sk);
1173 }
1174
1175 static int rawv6_init_sk(struct sock *sk)
1176 {
1177         struct raw6_sock *rp = raw6_sk(sk);
1178
1179         switch (inet_sk(sk)->num) {
1180         case IPPROTO_ICMPV6:
1181                 rp->checksum = 1;
1182                 rp->offset   = 2;
1183                 break;
1184         case IPPROTO_MH:
1185                 rp->checksum = 1;
1186                 rp->offset   = 4;
1187                 break;
1188         default:
1189                 break;
1190         }
1191         return(0);
1192 }
1193
1194 struct proto rawv6_prot = {
1195         .name              = "RAWv6",
1196         .owner             = THIS_MODULE,
1197         .close             = rawv6_close,
1198         .destroy           = raw6_destroy,
1199         .connect           = ip6_datagram_connect,
1200         .disconnect        = udp_disconnect,
1201         .ioctl             = rawv6_ioctl,
1202         .init              = rawv6_init_sk,
1203         .setsockopt        = rawv6_setsockopt,
1204         .getsockopt        = rawv6_getsockopt,
1205         .sendmsg           = rawv6_sendmsg,
1206         .recvmsg           = rawv6_recvmsg,
1207         .bind              = rawv6_bind,
1208         .backlog_rcv       = rawv6_rcv_skb,
1209         .hash              = raw_hash_sk,
1210         .unhash            = raw_unhash_sk,
1211         .obj_size          = sizeof(struct raw6_sock),
1212         .h.raw_hash        = &raw_v6_hashinfo,
1213 #ifdef CONFIG_COMPAT
1214         .compat_setsockopt = compat_rawv6_setsockopt,
1215         .compat_getsockopt = compat_rawv6_getsockopt,
1216 #endif
1217 };
1218
1219 #ifdef CONFIG_PROC_FS
1220 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1221 {
1222         struct ipv6_pinfo *np = inet6_sk(sp);
1223         struct in6_addr *dest, *src;
1224         __u16 destp, srcp;
1225
1226         dest  = &np->daddr;
1227         src   = &np->rcv_saddr;
1228         destp = 0;
1229         srcp  = inet_sk(sp)->num;
1230         seq_printf(seq,
1231                    "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1232                    "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
1233                    i,
1234                    src->s6_addr32[0], src->s6_addr32[1],
1235                    src->s6_addr32[2], src->s6_addr32[3], srcp,
1236                    dest->s6_addr32[0], dest->s6_addr32[1],
1237                    dest->s6_addr32[2], dest->s6_addr32[3], destp,
1238                    sp->sk_state,
1239                    atomic_read(&sp->sk_wmem_alloc),
1240                    atomic_read(&sp->sk_rmem_alloc),
1241                    0, 0L, 0,
1242                    sock_i_uid(sp), 0,
1243                    sock_i_ino(sp),
1244                    atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1245 }
1246
1247 static int raw6_seq_show(struct seq_file *seq, void *v)
1248 {
1249         if (v == SEQ_START_TOKEN)
1250                 seq_printf(seq,
1251                            "  sl  "
1252                            "local_address                         "
1253                            "remote_address                        "
1254                            "st tx_queue rx_queue tr tm->when retrnsmt"
1255                            "   uid  timeout inode ref pointer drops\n");
1256         else
1257                 raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1258         return 0;
1259 }
1260
1261 static const struct seq_operations raw6_seq_ops = {
1262         .start =        raw_seq_start,
1263         .next =         raw_seq_next,
1264         .stop =         raw_seq_stop,
1265         .show =         raw6_seq_show,
1266 };
1267
1268 static int raw6_seq_open(struct inode *inode, struct file *file)
1269 {
1270         return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1271 }
1272
1273 static const struct file_operations raw6_seq_fops = {
1274         .owner =        THIS_MODULE,
1275         .open =         raw6_seq_open,
1276         .read =         seq_read,
1277         .llseek =       seq_lseek,
1278         .release =      seq_release_net,
1279 };
1280
1281 static int raw6_init_net(struct net *net)
1282 {
1283         if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops))
1284                 return -ENOMEM;
1285
1286         return 0;
1287 }
1288
1289 static void raw6_exit_net(struct net *net)
1290 {
1291         proc_net_remove(net, "raw6");
1292 }
1293
1294 static struct pernet_operations raw6_net_ops = {
1295         .init = raw6_init_net,
1296         .exit = raw6_exit_net,
1297 };
1298
1299 int __init raw6_proc_init(void)
1300 {
1301         return register_pernet_subsys(&raw6_net_ops);
1302 }
1303
1304 void raw6_proc_exit(void)
1305 {
1306         unregister_pernet_subsys(&raw6_net_ops);
1307 }
1308 #endif  /* CONFIG_PROC_FS */
1309
1310 /* Same as inet6_dgram_ops, sans udp_poll.  */
1311 static const struct proto_ops inet6_sockraw_ops = {
1312         .family            = PF_INET6,
1313         .owner             = THIS_MODULE,
1314         .release           = inet6_release,
1315         .bind              = inet6_bind,
1316         .connect           = inet_dgram_connect,        /* ok           */
1317         .socketpair        = sock_no_socketpair,        /* a do nothing */
1318         .accept            = sock_no_accept,            /* a do nothing */
1319         .getname           = inet6_getname,
1320         .poll              = datagram_poll,             /* ok           */
1321         .ioctl             = inet6_ioctl,               /* must change  */
1322         .listen            = sock_no_listen,            /* ok           */
1323         .shutdown          = inet_shutdown,             /* ok           */
1324         .setsockopt        = sock_common_setsockopt,    /* ok           */
1325         .getsockopt        = sock_common_getsockopt,    /* ok           */
1326         .sendmsg           = inet_sendmsg,              /* ok           */
1327         .recvmsg           = sock_common_recvmsg,       /* ok           */
1328         .mmap              = sock_no_mmap,
1329         .sendpage          = sock_no_sendpage,
1330 #ifdef CONFIG_COMPAT
1331         .compat_setsockopt = compat_sock_common_setsockopt,
1332         .compat_getsockopt = compat_sock_common_getsockopt,
1333 #endif
1334 };
1335
1336 static struct inet_protosw rawv6_protosw = {
1337         .type           = SOCK_RAW,
1338         .protocol       = IPPROTO_IP,   /* wild card */
1339         .prot           = &rawv6_prot,
1340         .ops            = &inet6_sockraw_ops,
1341         .capability     = CAP_NET_RAW,
1342         .no_check       = UDP_CSUM_DEFAULT,
1343         .flags          = INET_PROTOSW_REUSE,
1344 };
1345
1346 int __init rawv6_init(void)
1347 {
1348         int ret;
1349
1350         ret = inet6_register_protosw(&rawv6_protosw);
1351         if (ret)
1352                 goto out;
1353 out:
1354         return ret;
1355 }
1356
1357 void rawv6_exit(void)
1358 {
1359         inet6_unregister_protosw(&rawv6_protosw);
1360 }