linux/net/ipv6/raw.c
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   1/*
   2 *      RAW sockets for IPv6
   3 *      Linux INET6 implementation
   4 *
   5 *      Authors:
   6 *      Pedro Roque             <roque@di.fc.ul.pt>
   7 *
   8 *      Adapted from linux/net/ipv4/raw.c
   9 *
  10 *      Fixes:
  11 *      Hideaki YOSHIFUJI       :       sin6_scope_id support
  12 *      YOSHIFUJI,H.@USAGI      :       raw checksum (RFC2292(bis) compliance)
  13 *      Kazunori MIYAZAWA @USAGI:       change process style to use ip6_append_data
  14 *
  15 *      This program is free software; you can redistribute it and/or
  16 *      modify it under the terms of the GNU General Public License
  17 *      as published by the Free Software Foundation; either version
  18 *      2 of the License, or (at your option) any later version.
  19 */
  20
  21#include <linux/errno.h>
  22#include <linux/types.h>
  23#include <linux/socket.h>
  24#include <linux/slab.h>
  25#include <linux/sockios.h>
  26#include <linux/net.h>
  27#include <linux/in6.h>
  28#include <linux/netdevice.h>
  29#include <linux/if_arp.h>
  30#include <linux/icmpv6.h>
  31#include <linux/netfilter.h>
  32#include <linux/netfilter_ipv6.h>
  33#include <linux/skbuff.h>
  34#include <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#include <linux/export.h>
  65
  66static struct raw_hashinfo raw_v6_hashinfo = {
  67        .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
  68};
  69
  70static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
  71                unsigned short num, const struct in6_addr *loc_addr,
  72                const struct in6_addr *rmt_addr, int dif)
  73{
  74        struct hlist_node *node;
  75        bool is_multicast = ipv6_addr_is_multicast(loc_addr);
  76
  77        sk_for_each_from(sk, node)
  78                if (inet_sk(sk)->inet_num == num) {
  79                        struct ipv6_pinfo *np = inet6_sk(sk);
  80
  81                        if (!net_eq(sock_net(sk), net))
  82                                continue;
  83
  84                        if (!ipv6_addr_any(&np->daddr) &&
  85                            !ipv6_addr_equal(&np->daddr, rmt_addr))
  86                                continue;
  87
  88                        if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
  89                                continue;
  90
  91                        if (!ipv6_addr_any(&np->rcv_saddr)) {
  92                                if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
  93                                        goto found;
  94                                if (is_multicast &&
  95                                    inet6_mc_check(sk, loc_addr, rmt_addr))
  96                                        goto found;
  97                                continue;
  98                        }
  99                        goto found;
 100                }
 101        sk = NULL;
 102found:
 103        return sk;
 104}
 105
 106/*
 107 *      0 - deliver
 108 *      1 - block
 109 */
 110static int icmpv6_filter(const struct sock *sk, const struct sk_buff *skb)
 111{
 112        struct icmp6hdr *_hdr;
 113        const struct icmp6hdr *hdr;
 114
 115        hdr = skb_header_pointer(skb, skb_transport_offset(skb),
 116                                 sizeof(_hdr), &_hdr);
 117        if (hdr) {
 118                const __u32 *data = &raw6_sk(sk)->filter.data[0];
 119                unsigned int type = hdr->icmp6_type;
 120
 121                return (data[type >> 5] & (1U << (type & 31))) != 0;
 122        }
 123        return 1;
 124}
 125
 126#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 127typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb);
 128
 129static mh_filter_t __rcu *mh_filter __read_mostly;
 130
 131int rawv6_mh_filter_register(mh_filter_t filter)
 132{
 133        rcu_assign_pointer(mh_filter, filter);
 134        return 0;
 135}
 136EXPORT_SYMBOL(rawv6_mh_filter_register);
 137
 138int rawv6_mh_filter_unregister(mh_filter_t filter)
 139{
 140        RCU_INIT_POINTER(mh_filter, NULL);
 141        synchronize_rcu();
 142        return 0;
 143}
 144EXPORT_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 */
 155static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
 156{
 157        const struct in6_addr *saddr;
 158        const struct in6_addr *daddr;
 159        struct sock *sk;
 160        bool delivered = false;
 161        __u8 hash;
 162        struct net *net;
 163
 164        saddr = &ipv6_hdr(skb)->saddr;
 165        daddr = saddr + 1;
 166
 167        hash = nexthdr & (RAW_HTABLE_SIZE - 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 = true;
 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        }
 222out:
 223        read_unlock(&raw_v6_hashinfo.lock);
 224        return delivered;
 225}
 226
 227bool 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 & (RAW_HTABLE_SIZE - 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 */
 239static 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        np->rcv_saddr = addr->sin6_addr;
 302        if (!(addr_type & IPV6_ADDR_MULTICAST))
 303                np->saddr = addr->sin6_addr;
 304        err = 0;
 305out_unlock:
 306        rcu_read_unlock();
 307out:
 308        release_sock(sk);
 309        return err;
 310}
 311
 312static 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                ip6_sk_update_pmtu(skb, sk, info);
 332                harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
 333        }
 334        if (type == NDISC_REDIRECT)
 335                ip6_sk_redirect(skb, sk);
 336        if (np->recverr) {
 337                u8 *payload = skb->data;
 338                if (!inet->hdrincl)
 339                        payload += offset;
 340                ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
 341        }
 342
 343        if (np->recverr || harderr) {
 344                sk->sk_err = err;
 345                sk->sk_error_report(sk);
 346        }
 347}
 348
 349void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
 350                u8 type, u8 code, int inner_offset, __be32 info)
 351{
 352        struct sock *sk;
 353        int hash;
 354        const struct in6_addr *saddr, *daddr;
 355        struct net *net;
 356
 357        hash = nexthdr & (RAW_HTABLE_SIZE - 1);
 358
 359        read_lock(&raw_v6_hashinfo.lock);
 360        sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 361        if (sk != NULL) {
 362                /* Note: ipv6_hdr(skb) != skb->data */
 363                const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data;
 364                saddr = &ip6h->saddr;
 365                daddr = &ip6h->daddr;
 366                net = dev_net(skb->dev);
 367
 368                while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
 369                                                IP6CB(skb)->iif))) {
 370                        rawv6_err(sk, skb, NULL, type, code,
 371                                        inner_offset, info);
 372                        sk = sk_next(sk);
 373                }
 374        }
 375        read_unlock(&raw_v6_hashinfo.lock);
 376}
 377
 378static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb)
 379{
 380        if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) &&
 381            skb_checksum_complete(skb)) {
 382                atomic_inc(&sk->sk_drops);
 383                kfree_skb(skb);
 384                return NET_RX_DROP;
 385        }
 386
 387        /* Charge it to the socket. */
 388        skb_dst_drop(skb);
 389        if (sock_queue_rcv_skb(sk, skb) < 0) {
 390                kfree_skb(skb);
 391                return NET_RX_DROP;
 392        }
 393
 394        return 0;
 395}
 396
 397/*
 398 *      This is next to useless...
 399 *      if we demultiplex in network layer we don't need the extra call
 400 *      just to queue the skb...
 401 *      maybe we could have the network decide upon a hint if it
 402 *      should call raw_rcv for demultiplexing
 403 */
 404int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
 405{
 406        struct inet_sock *inet = inet_sk(sk);
 407        struct raw6_sock *rp = raw6_sk(sk);
 408
 409        if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
 410                atomic_inc(&sk->sk_drops);
 411                kfree_skb(skb);
 412                return NET_RX_DROP;
 413        }
 414
 415        if (!rp->checksum)
 416                skb->ip_summed = CHECKSUM_UNNECESSARY;
 417
 418        if (skb->ip_summed == CHECKSUM_COMPLETE) {
 419                skb_postpull_rcsum(skb, skb_network_header(skb),
 420                                   skb_network_header_len(skb));
 421                if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 422                                     &ipv6_hdr(skb)->daddr,
 423                                     skb->len, inet->inet_num, skb->csum))
 424                        skb->ip_summed = CHECKSUM_UNNECESSARY;
 425        }
 426        if (!skb_csum_unnecessary(skb))
 427                skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 428                                                         &ipv6_hdr(skb)->daddr,
 429                                                         skb->len,
 430                                                         inet->inet_num, 0));
 431
 432        if (inet->hdrincl) {
 433                if (skb_checksum_complete(skb)) {
 434                        atomic_inc(&sk->sk_drops);
 435                        kfree_skb(skb);
 436                        return NET_RX_DROP;
 437                }
 438        }
 439
 440        rawv6_rcv_skb(sk, skb);
 441        return 0;
 442}
 443
 444
 445/*
 446 *      This should be easy, if there is something there
 447 *      we return it, otherwise we block.
 448 */
 449
 450static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
 451                  struct msghdr *msg, size_t len,
 452                  int noblock, int flags, int *addr_len)
 453{
 454        struct ipv6_pinfo *np = inet6_sk(sk);
 455        struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
 456        struct sk_buff *skb;
 457        size_t copied;
 458        int err;
 459
 460        if (flags & MSG_OOB)
 461                return -EOPNOTSUPP;
 462
 463        if (addr_len)
 464                *addr_len=sizeof(*sin6);
 465
 466        if (flags & MSG_ERRQUEUE)
 467                return ipv6_recv_error(sk, msg, len);
 468
 469        if (np->rxpmtu && np->rxopt.bits.rxpmtu)
 470                return ipv6_recv_rxpmtu(sk, msg, len);
 471
 472        skb = skb_recv_datagram(sk, flags, noblock, &err);
 473        if (!skb)
 474                goto out;
 475
 476        copied = skb->len;
 477        if (copied > len) {
 478                copied = len;
 479                msg->msg_flags |= MSG_TRUNC;
 480        }
 481
 482        if (skb_csum_unnecessary(skb)) {
 483                err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 484        } else if (msg->msg_flags&MSG_TRUNC) {
 485                if (__skb_checksum_complete(skb))
 486                        goto csum_copy_err;
 487                err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 488        } else {
 489                err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
 490                if (err == -EINVAL)
 491                        goto csum_copy_err;
 492        }
 493        if (err)
 494                goto out_free;
 495
 496        /* Copy the address. */
 497        if (sin6) {
 498                sin6->sin6_family = AF_INET6;
 499                sin6->sin6_port = 0;
 500                sin6->sin6_addr = ipv6_hdr(skb)->saddr;
 501                sin6->sin6_flowinfo = 0;
 502                sin6->sin6_scope_id = 0;
 503                if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
 504                        sin6->sin6_scope_id = IP6CB(skb)->iif;
 505        }
 506
 507        sock_recv_ts_and_drops(msg, sk, skb);
 508
 509        if (np->rxopt.all)
 510                datagram_recv_ctl(sk, msg, skb);
 511
 512        err = copied;
 513        if (flags & MSG_TRUNC)
 514                err = skb->len;
 515
 516out_free:
 517        skb_free_datagram(sk, skb);
 518out:
 519        return err;
 520
 521csum_copy_err:
 522        skb_kill_datagram(sk, skb, flags);
 523
 524        /* Error for blocking case is chosen to masquerade
 525           as some normal condition.
 526         */
 527        err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
 528        goto out;
 529}
 530
 531static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
 532                                     struct raw6_sock *rp)
 533{
 534        struct sk_buff *skb;
 535        int err = 0;
 536        int offset;
 537        int len;
 538        int total_len;
 539        __wsum tmp_csum;
 540        __sum16 csum;
 541
 542        if (!rp->checksum)
 543                goto send;
 544
 545        if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
 546                goto out;
 547
 548        offset = rp->offset;
 549        total_len = inet_sk(sk)->cork.base.length;
 550        if (offset >= total_len - 1) {
 551                err = -EINVAL;
 552                ip6_flush_pending_frames(sk);
 553                goto out;
 554        }
 555
 556        /* should be check HW csum miyazawa */
 557        if (skb_queue_len(&sk->sk_write_queue) == 1) {
 558                /*
 559                 * Only one fragment on the socket.
 560                 */
 561                tmp_csum = skb->csum;
 562        } else {
 563                struct sk_buff *csum_skb = NULL;
 564                tmp_csum = 0;
 565
 566                skb_queue_walk(&sk->sk_write_queue, skb) {
 567                        tmp_csum = csum_add(tmp_csum, skb->csum);
 568
 569                        if (csum_skb)
 570                                continue;
 571
 572                        len = skb->len - skb_transport_offset(skb);
 573                        if (offset >= len) {
 574                                offset -= len;
 575                                continue;
 576                        }
 577
 578                        csum_skb = skb;
 579                }
 580
 581                skb = csum_skb;
 582        }
 583
 584        offset += skb_transport_offset(skb);
 585        if (skb_copy_bits(skb, offset, &csum, 2))
 586                BUG();
 587
 588        /* in case cksum was not initialized */
 589        if (unlikely(csum))
 590                tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
 591
 592        csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr,
 593                               total_len, fl6->flowi6_proto, tmp_csum);
 594
 595        if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP)
 596                csum = CSUM_MANGLED_0;
 597
 598        if (skb_store_bits(skb, offset, &csum, 2))
 599                BUG();
 600
 601send:
 602        err = ip6_push_pending_frames(sk);
 603out:
 604        return err;
 605}
 606
 607static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
 608                        struct flowi6 *fl6, struct dst_entry **dstp,
 609                        unsigned int flags)
 610{
 611        struct ipv6_pinfo *np = inet6_sk(sk);
 612        struct ipv6hdr *iph;
 613        struct sk_buff *skb;
 614        int err;
 615        struct rt6_info *rt = (struct rt6_info *)*dstp;
 616        int hlen = LL_RESERVED_SPACE(rt->dst.dev);
 617        int tlen = rt->dst.dev->needed_tailroom;
 618
 619        if (length > rt->dst.dev->mtu) {
 620                ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu);
 621                return -EMSGSIZE;
 622        }
 623        if (flags&MSG_PROBE)
 624                goto out;
 625
 626        skb = sock_alloc_send_skb(sk,
 627                                  length + hlen + tlen + 15,
 628                                  flags & MSG_DONTWAIT, &err);
 629        if (skb == NULL)
 630                goto error;
 631        skb_reserve(skb, hlen);
 632
 633        skb->priority = sk->sk_priority;
 634        skb->mark = sk->sk_mark;
 635        skb_dst_set(skb, &rt->dst);
 636        *dstp = NULL;
 637
 638        skb_put(skb, length);
 639        skb_reset_network_header(skb);
 640        iph = ipv6_hdr(skb);
 641
 642        skb->ip_summed = CHECKSUM_NONE;
 643
 644        skb->transport_header = skb->network_header;
 645        err = memcpy_fromiovecend((void *)iph, from, 0, length);
 646        if (err)
 647                goto error_fault;
 648
 649        IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
 650        err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL,
 651                      rt->dst.dev, dst_output);
 652        if (err > 0)
 653                err = net_xmit_errno(err);
 654        if (err)
 655                goto error;
 656out:
 657        return 0;
 658
 659error_fault:
 660        err = -EFAULT;
 661        kfree_skb(skb);
 662error:
 663        IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
 664        if (err == -ENOBUFS && !np->recverr)
 665                err = 0;
 666        return err;
 667}
 668
 669static int rawv6_probe_proto_opt(struct flowi6 *fl6, struct msghdr *msg)
 670{
 671        struct iovec *iov;
 672        u8 __user *type = NULL;
 673        u8 __user *code = NULL;
 674        u8 len = 0;
 675        int probed = 0;
 676        int i;
 677
 678        if (!msg->msg_iov)
 679                return 0;
 680
 681        for (i = 0; i < msg->msg_iovlen; i++) {
 682                iov = &msg->msg_iov[i];
 683                if (!iov)
 684                        continue;
 685
 686                switch (fl6->flowi6_proto) {
 687                case IPPROTO_ICMPV6:
 688                        /* check if one-byte field is readable or not. */
 689                        if (iov->iov_base && iov->iov_len < 1)
 690                                break;
 691
 692                        if (!type) {
 693                                type = iov->iov_base;
 694                                /* check if code field is readable or not. */
 695                                if (iov->iov_len > 1)
 696                                        code = type + 1;
 697                        } else if (!code)
 698                                code = iov->iov_base;
 699
 700                        if (type && code) {
 701                                if (get_user(fl6->fl6_icmp_type, type) ||
 702                                    get_user(fl6->fl6_icmp_code, code))
 703                                        return -EFAULT;
 704                                probed = 1;
 705                        }
 706                        break;
 707                case IPPROTO_MH:
 708                        if (iov->iov_base && iov->iov_len < 1)
 709                                break;
 710                        /* check if type field is readable or not. */
 711                        if (iov->iov_len > 2 - len) {
 712                                u8 __user *p = iov->iov_base;
 713                                if (get_user(fl6->fl6_mh_type, &p[2 - len]))
 714                                        return -EFAULT;
 715                                probed = 1;
 716                        } else
 717                                len += iov->iov_len;
 718
 719                        break;
 720                default:
 721                        probed = 1;
 722                        break;
 723                }
 724                if (probed)
 725                        break;
 726        }
 727        return 0;
 728}
 729
 730static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
 731                   struct msghdr *msg, size_t len)
 732{
 733        struct ipv6_txoptions opt_space;
 734        struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
 735        struct in6_addr *daddr, *final_p, final;
 736        struct inet_sock *inet = inet_sk(sk);
 737        struct ipv6_pinfo *np = inet6_sk(sk);
 738        struct raw6_sock *rp = raw6_sk(sk);
 739        struct ipv6_txoptions *opt = NULL;
 740        struct ip6_flowlabel *flowlabel = NULL;
 741        struct dst_entry *dst = NULL;
 742        struct flowi6 fl6;
 743        int addr_len = msg->msg_namelen;
 744        int hlimit = -1;
 745        int tclass = -1;
 746        int dontfrag = -1;
 747        u16 proto;
 748        int err;
 749
 750        /* Rough check on arithmetic overflow,
 751           better check is made in ip6_append_data().
 752         */
 753        if (len > INT_MAX)
 754                return -EMSGSIZE;
 755
 756        /* Mirror BSD error message compatibility */
 757        if (msg->msg_flags & MSG_OOB)
 758                return -EOPNOTSUPP;
 759
 760        /*
 761         *      Get and verify the address.
 762         */
 763        memset(&fl6, 0, sizeof(fl6));
 764
 765        fl6.flowi6_mark = sk->sk_mark;
 766
 767        if (sin6) {
 768                if (addr_len < SIN6_LEN_RFC2133)
 769                        return -EINVAL;
 770
 771                if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
 772                        return -EAFNOSUPPORT;
 773
 774                /* port is the proto value [0..255] carried in nexthdr */
 775                proto = ntohs(sin6->sin6_port);
 776
 777                if (!proto)
 778                        proto = inet->inet_num;
 779                else if (proto != inet->inet_num)
 780                        return -EINVAL;
 781
 782                if (proto > 255)
 783                        return -EINVAL;
 784
 785                daddr = &sin6->sin6_addr;
 786                if (np->sndflow) {
 787                        fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
 788                        if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
 789                                flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
 790                                if (flowlabel == NULL)
 791                                        return -EINVAL;
 792                                daddr = &flowlabel->dst;
 793                        }
 794                }
 795
 796                /*
 797                 * Otherwise it will be difficult to maintain
 798                 * sk->sk_dst_cache.
 799                 */
 800                if (sk->sk_state == TCP_ESTABLISHED &&
 801                    ipv6_addr_equal(daddr, &np->daddr))
 802                        daddr = &np->daddr;
 803
 804                if (addr_len >= sizeof(struct sockaddr_in6) &&
 805                    sin6->sin6_scope_id &&
 806                    ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
 807                        fl6.flowi6_oif = sin6->sin6_scope_id;
 808        } else {
 809                if (sk->sk_state != TCP_ESTABLISHED)
 810                        return -EDESTADDRREQ;
 811
 812                proto = inet->inet_num;
 813                daddr = &np->daddr;
 814                fl6.flowlabel = np->flow_label;
 815        }
 816
 817        if (fl6.flowi6_oif == 0)
 818                fl6.flowi6_oif = sk->sk_bound_dev_if;
 819
 820        if (msg->msg_controllen) {
 821                opt = &opt_space;
 822                memset(opt, 0, sizeof(struct ipv6_txoptions));
 823                opt->tot_len = sizeof(struct ipv6_txoptions);
 824
 825                err = datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt,
 826                                        &hlimit, &tclass, &dontfrag);
 827                if (err < 0) {
 828                        fl6_sock_release(flowlabel);
 829                        return err;
 830                }
 831                if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
 832                        flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
 833                        if (flowlabel == NULL)
 834                                return -EINVAL;
 835                }
 836                if (!(opt->opt_nflen|opt->opt_flen))
 837                        opt = NULL;
 838        }
 839        if (opt == NULL)
 840                opt = np->opt;
 841        if (flowlabel)
 842                opt = fl6_merge_options(&opt_space, flowlabel, opt);
 843        opt = ipv6_fixup_options(&opt_space, opt);
 844
 845        fl6.flowi6_proto = proto;
 846        err = rawv6_probe_proto_opt(&fl6, msg);
 847        if (err)
 848                goto out;
 849
 850        if (!ipv6_addr_any(daddr))
 851                fl6.daddr = *daddr;
 852        else
 853                fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
 854        if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
 855                fl6.saddr = np->saddr;
 856
 857        final_p = fl6_update_dst(&fl6, opt, &final);
 858
 859        if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
 860                fl6.flowi6_oif = np->mcast_oif;
 861        else if (!fl6.flowi6_oif)
 862                fl6.flowi6_oif = np->ucast_oif;
 863        security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
 864
 865        dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true);
 866        if (IS_ERR(dst)) {
 867                err = PTR_ERR(dst);
 868                goto out;
 869        }
 870        if (hlimit < 0) {
 871                if (ipv6_addr_is_multicast(&fl6.daddr))
 872                        hlimit = np->mcast_hops;
 873                else
 874                        hlimit = np->hop_limit;
 875                if (hlimit < 0)
 876                        hlimit = ip6_dst_hoplimit(dst);
 877        }
 878
 879        if (tclass < 0)
 880                tclass = np->tclass;
 881
 882        if (dontfrag < 0)
 883                dontfrag = np->dontfrag;
 884
 885        if (msg->msg_flags&MSG_CONFIRM)
 886                goto do_confirm;
 887
 888back_from_confirm:
 889        if (inet->hdrincl)
 890                err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl6, &dst, msg->msg_flags);
 891        else {
 892                lock_sock(sk);
 893                err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
 894                        len, 0, hlimit, tclass, opt, &fl6, (struct rt6_info*)dst,
 895                        msg->msg_flags, dontfrag);
 896
 897                if (err)
 898                        ip6_flush_pending_frames(sk);
 899                else if (!(msg->msg_flags & MSG_MORE))
 900                        err = rawv6_push_pending_frames(sk, &fl6, rp);
 901                release_sock(sk);
 902        }
 903done:
 904        dst_release(dst);
 905out:
 906        fl6_sock_release(flowlabel);
 907        return err<0?err:len;
 908do_confirm:
 909        dst_confirm(dst);
 910        if (!(msg->msg_flags & MSG_PROBE) || len)
 911                goto back_from_confirm;
 912        err = 0;
 913        goto done;
 914}
 915
 916static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
 917                               char __user *optval, int optlen)
 918{
 919        switch (optname) {
 920        case ICMPV6_FILTER:
 921                if (optlen > sizeof(struct icmp6_filter))
 922                        optlen = sizeof(struct icmp6_filter);
 923                if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
 924                        return -EFAULT;
 925                return 0;
 926        default:
 927                return -ENOPROTOOPT;
 928        }
 929
 930        return 0;
 931}
 932
 933static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
 934                               char __user *optval, int __user *optlen)
 935{
 936        int len;
 937
 938        switch (optname) {
 939        case ICMPV6_FILTER:
 940                if (get_user(len, optlen))
 941                        return -EFAULT;
 942                if (len < 0)
 943                        return -EINVAL;
 944                if (len > sizeof(struct icmp6_filter))
 945                        len = sizeof(struct icmp6_filter);
 946                if (put_user(len, optlen))
 947                        return -EFAULT;
 948                if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
 949                        return -EFAULT;
 950                return 0;
 951        default:
 952                return -ENOPROTOOPT;
 953        }
 954
 955        return 0;
 956}
 957
 958
 959static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
 960                            char __user *optval, unsigned int optlen)
 961{
 962        struct raw6_sock *rp = raw6_sk(sk);
 963        int val;
 964
 965        if (get_user(val, (int __user *)optval))
 966                return -EFAULT;
 967
 968        switch (optname) {
 969        case IPV6_CHECKSUM:
 970                if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
 971                    level == IPPROTO_IPV6) {
 972                        /*
 973                         * RFC3542 tells that IPV6_CHECKSUM socket
 974                         * option in the IPPROTO_IPV6 level is not
 975                         * allowed on ICMPv6 sockets.
 976                         * If you want to set it, use IPPROTO_RAW
 977                         * level IPV6_CHECKSUM socket option
 978                         * (Linux extension).
 979                         */
 980                        return -EINVAL;
 981                }
 982
 983                /* You may get strange result with a positive odd offset;
 984                   RFC2292bis agrees with me. */
 985                if (val > 0 && (val&1))
 986                        return -EINVAL;
 987                if (val < 0) {
 988                        rp->checksum = 0;
 989                } else {
 990                        rp->checksum = 1;
 991                        rp->offset = val;
 992                }
 993
 994                return 0;
 995
 996        default:
 997                return -ENOPROTOOPT;
 998        }
 999}
1000
1001static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1002                          char __user *optval, unsigned int optlen)
1003{
1004        switch (level) {
1005        case SOL_RAW:
1006                break;
1007
1008        case SOL_ICMPV6:
1009                if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1010                        return -EOPNOTSUPP;
1011                return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1012        case SOL_IPV6:
1013                if (optname == IPV6_CHECKSUM)
1014                        break;
1015        default:
1016                return ipv6_setsockopt(sk, level, optname, optval, optlen);
1017        }
1018
1019        return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1020}
1021
1022#ifdef CONFIG_COMPAT
1023static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1024                                   char __user *optval, unsigned int optlen)
1025{
1026        switch (level) {
1027        case SOL_RAW:
1028                break;
1029        case SOL_ICMPV6:
1030                if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1031                        return -EOPNOTSUPP;
1032                return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1033        case SOL_IPV6:
1034                if (optname == IPV6_CHECKSUM)
1035                        break;
1036        default:
1037                return compat_ipv6_setsockopt(sk, level, optname,
1038                                              optval, optlen);
1039        }
1040        return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1041}
1042#endif
1043
1044static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1045                            char __user *optval, int __user *optlen)
1046{
1047        struct raw6_sock *rp = raw6_sk(sk);
1048        int val, len;
1049
1050        if (get_user(len,optlen))
1051                return -EFAULT;
1052
1053        switch (optname) {
1054        case IPV6_CHECKSUM:
1055                /*
1056                 * We allow getsockopt() for IPPROTO_IPV6-level
1057                 * IPV6_CHECKSUM socket option on ICMPv6 sockets
1058                 * since RFC3542 is silent about it.
1059                 */
1060                if (rp->checksum == 0)
1061                        val = -1;
1062                else
1063                        val = rp->offset;
1064                break;
1065
1066        default:
1067                return -ENOPROTOOPT;
1068        }
1069
1070        len = min_t(unsigned int, sizeof(int), len);
1071
1072        if (put_user(len, optlen))
1073                return -EFAULT;
1074        if (copy_to_user(optval,&val,len))
1075                return -EFAULT;
1076        return 0;
1077}
1078
1079static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1080                          char __user *optval, int __user *optlen)
1081{
1082        switch (level) {
1083        case SOL_RAW:
1084                break;
1085
1086        case SOL_ICMPV6:
1087                if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1088                        return -EOPNOTSUPP;
1089                return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1090        case SOL_IPV6:
1091                if (optname == IPV6_CHECKSUM)
1092                        break;
1093        default:
1094                return ipv6_getsockopt(sk, level, optname, optval, optlen);
1095        }
1096
1097        return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1098}
1099
1100#ifdef CONFIG_COMPAT
1101static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1102                                   char __user *optval, int __user *optlen)
1103{
1104        switch (level) {
1105        case SOL_RAW:
1106                break;
1107        case SOL_ICMPV6:
1108                if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1109                        return -EOPNOTSUPP;
1110                return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1111        case SOL_IPV6:
1112                if (optname == IPV6_CHECKSUM)
1113                        break;
1114        default:
1115                return compat_ipv6_getsockopt(sk, level, optname,
1116                                              optval, optlen);
1117        }
1118        return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1119}
1120#endif
1121
1122static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1123{
1124        switch (cmd) {
1125        case SIOCOUTQ: {
1126                int amount = sk_wmem_alloc_get(sk);
1127
1128                return put_user(amount, (int __user *)arg);
1129        }
1130        case SIOCINQ: {
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
1152static 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
1168static 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
1176static 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
1185static 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
1204struct 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
1231static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1232{
1233        struct ipv6_pinfo *np = inet6_sk(sp);
1234        const 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 %pK %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                   from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)),
1254                   0,
1255                   sock_i_ino(sp),
1256                   atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1257}
1258
1259static int raw6_seq_show(struct seq_file *seq, void *v)
1260{
1261        if (v == SEQ_START_TOKEN)
1262                seq_printf(seq,
1263                           "  sl  "
1264                           "local_address                         "
1265                           "remote_address                        "
1266                           "st tx_queue rx_queue tr tm->when retrnsmt"
1267                           "   uid  timeout inode ref pointer drops\n");
1268        else
1269                raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1270        return 0;
1271}
1272
1273static const struct seq_operations raw6_seq_ops = {
1274        .start =        raw_seq_start,
1275        .next =         raw_seq_next,
1276        .stop =         raw_seq_stop,
1277        .show =         raw6_seq_show,
1278};
1279
1280static int raw6_seq_open(struct inode *inode, struct file *file)
1281{
1282        return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1283}
1284
1285static const struct file_operations raw6_seq_fops = {
1286        .owner =        THIS_MODULE,
1287        .open =         raw6_seq_open,
1288        .read =         seq_read,
1289        .llseek =       seq_lseek,
1290        .release =      seq_release_net,
1291};
1292
1293static int __net_init raw6_init_net(struct net *net)
1294{
1295        if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops))
1296                return -ENOMEM;
1297
1298        return 0;
1299}
1300
1301static void __net_exit raw6_exit_net(struct net *net)
1302{
1303        proc_net_remove(net, "raw6");
1304}
1305
1306static struct pernet_operations raw6_net_ops = {
1307        .init = raw6_init_net,
1308        .exit = raw6_exit_net,
1309};
1310
1311int __init raw6_proc_init(void)
1312{
1313        return register_pernet_subsys(&raw6_net_ops);
1314}
1315
1316void raw6_proc_exit(void)
1317{
1318        unregister_pernet_subsys(&raw6_net_ops);
1319}
1320#endif  /* CONFIG_PROC_FS */
1321
1322/* Same as inet6_dgram_ops, sans udp_poll.  */
1323static const struct proto_ops inet6_sockraw_ops = {
1324        .family            = PF_INET6,
1325        .owner             = THIS_MODULE,
1326        .release           = inet6_release,
1327        .bind              = inet6_bind,
1328        .connect           = inet_dgram_connect,        /* ok           */
1329        .socketpair        = sock_no_socketpair,        /* a do nothing */
1330        .accept            = sock_no_accept,            /* a do nothing */
1331        .getname           = inet6_getname,
1332        .poll              = datagram_poll,             /* ok           */
1333        .ioctl             = inet6_ioctl,               /* must change  */
1334        .listen            = sock_no_listen,            /* ok           */
1335        .shutdown          = inet_shutdown,             /* ok           */
1336        .setsockopt        = sock_common_setsockopt,    /* ok           */
1337        .getsockopt        = sock_common_getsockopt,    /* ok           */
1338        .sendmsg           = inet_sendmsg,              /* ok           */
1339        .recvmsg           = sock_common_recvmsg,       /* ok           */
1340        .mmap              = sock_no_mmap,
1341        .sendpage          = sock_no_sendpage,
1342#ifdef CONFIG_COMPAT
1343        .compat_setsockopt = compat_sock_common_setsockopt,
1344        .compat_getsockopt = compat_sock_common_getsockopt,
1345#endif
1346};
1347
1348static struct inet_protosw rawv6_protosw = {
1349        .type           = SOCK_RAW,
1350        .protocol       = IPPROTO_IP,   /* wild card */
1351        .prot           = &rawv6_prot,
1352        .ops            = &inet6_sockraw_ops,
1353        .no_check       = UDP_CSUM_DEFAULT,
1354        .flags          = INET_PROTOSW_REUSE,
1355};
1356
1357int __init rawv6_init(void)
1358{
1359        int ret;
1360
1361        ret = inet6_register_protosw(&rawv6_protosw);
1362        if (ret)
1363                goto out;
1364out:
1365        return ret;
1366}
1367
1368void rawv6_exit(void)
1369{
1370        inet6_unregister_protosw(&rawv6_protosw);
1371}
1372
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