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
  65static struct raw_hashinfo raw_v6_hashinfo = {
  66	.lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
  67};
  68
  69static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
  70		unsigned short num, const struct in6_addr *loc_addr,
  71		const struct in6_addr *rmt_addr, int dif)
  72{
  73	struct hlist_node *node;
  74	int is_multicast = ipv6_addr_is_multicast(loc_addr);
  75
  76	sk_for_each_from(sk, node)
  77		if (inet_sk(sk)->inet_num == num) {
  78			struct ipv6_pinfo *np = inet6_sk(sk);
  79
  80			if (!net_eq(sock_net(sk), net))
  81				continue;
  82
  83			if (!ipv6_addr_any(&np->daddr) &&
  84			    !ipv6_addr_equal(&np->daddr, rmt_addr))
  85				continue;
  86
  87			if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
  88				continue;
  89
  90			if (!ipv6_addr_any(&np->rcv_saddr)) {
  91				if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
  92					goto found;
  93				if (is_multicast &&
  94				    inet6_mc_check(sk, loc_addr, rmt_addr))
  95					goto found;
  96				continue;
  97			}
  98			goto found;
  99		}
 100	sk = NULL;
 101found:
 102	return sk;
 103}
 104
 105/*
 106 *	0 - deliver
 107 *	1 - block
 108 */
 109static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
 110{
 111	struct icmp6hdr *icmph;
 112	struct raw6_sock *rp = raw6_sk(sk);
 113
 114	if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) {
 115		__u32 *data = &rp->filter.data[0];
 116		int bit_nr;
 117
 118		icmph = (struct icmp6hdr *) skb->data;
 119		bit_nr = icmph->icmp6_type;
 120
 121		return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0;
 122	}
 123	return 0;
 124}
 125
 126#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 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_assign_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 int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
 156{
 157	const struct in6_addr *saddr;
 158	const struct in6_addr *daddr;
 159	struct sock *sk;
 160	int delivered = 0;
 161	__u8 hash;
 162	struct net *net;
 163
 164	saddr = &ipv6_hdr(skb)->saddr;
 165	daddr = saddr + 1;
 166
 167	hash = nexthdr & (MAX_INET_PROTOS - 1);
 168
 169	read_lock(&raw_v6_hashinfo.lock);
 170	sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 171
 172	if (sk == NULL)
 173		goto out;
 174
 175	net = dev_net(skb->dev);
 176	sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
 177
 178	while (sk) {
 179		int filtered;
 180
 181		delivered = 1;
 182		switch (nexthdr) {
 183		case IPPROTO_ICMPV6:
 184			filtered = icmpv6_filter(sk, skb);
 185			break;
 186
 187#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 188		case IPPROTO_MH:
 189		{
 190			/* XXX: To validate MH only once for each packet,
 191			 * this is placed here. It should be after checking
 192			 * xfrm policy, however it doesn't. The checking xfrm
 193			 * policy is placed in rawv6_rcv() because it is
 194			 * required for each socket.
 195			 */
 196			mh_filter_t *filter;
 197
 198			filter = rcu_dereference(mh_filter);
 199			filtered = filter ? (*filter)(sk, skb) : 0;
 200			break;
 201		}
 202#endif
 203		default:
 204			filtered = 0;
 205			break;
 206		}
 207
 208		if (filtered < 0)
 209			break;
 210		if (filtered == 0) {
 211			struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
 212
 213			/* Not releasing hash table! */
 214			if (clone) {
 215				nf_reset(clone);
 216				rawv6_rcv(sk, clone);
 217			}
 218		}
 219		sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
 220				     IP6CB(skb)->iif);
 221	}
 222out:
 223	read_unlock(&raw_v6_hashinfo.lock);
 224	return delivered;
 225}
 226
 227int raw6_local_deliver(struct sk_buff *skb, int nexthdr)
 228{
 229	struct sock *raw_sk;
 230
 231	raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]);
 232	if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
 233		raw_sk = NULL;
 234
 235	return raw_sk != NULL;
 236}
 237
 238/* This cleans up af_inet6 a bit. -DaveM */
 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	ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
 302	if (!(addr_type & IPV6_ADDR_MULTICAST))
 303		ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
 304	err = 0;
 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		harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
 332
 333	if (np->recverr) {
 334		u8 *payload = skb->data;
 335		if (!inet->hdrincl)
 336			payload += offset;
 337		ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
 338	}
 339
 340	if (np->recverr || harderr) {
 341		sk->sk_err = err;
 342		sk->sk_error_report(sk);
 343	}
 344}
 345
 346void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
 347		u8 type, u8 code, int inner_offset, __be32 info)
 348{
 349	struct sock *sk;
 350	int hash;
 351	const struct in6_addr *saddr, *daddr;
 352	struct net *net;
 353
 354	hash = nexthdr & (RAW_HTABLE_SIZE - 1);
 355
 356	read_lock(&raw_v6_hashinfo.lock);
 357	sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 358	if (sk != NULL) {
 359		/* Note: ipv6_hdr(skb) != skb->data */
 360		const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data;
 361		saddr = &ip6h->saddr;
 362		daddr = &ip6h->daddr;
 363		net = dev_net(skb->dev);
 364
 365		while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
 366						IP6CB(skb)->iif))) {
 367			rawv6_err(sk, skb, NULL, type, code,
 368					inner_offset, info);
 369			sk = sk_next(sk);
 370		}
 371	}
 372	read_unlock(&raw_v6_hashinfo.lock);
 373}
 374
 375static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
 376{
 377	if ((raw6_sk(sk)->checksum || rcu_dereference_raw(sk->sk_filter)) &&
 378	    skb_checksum_complete(skb)) {
 379		atomic_inc(&sk->sk_drops);
 380		kfree_skb(skb);
 381		return NET_RX_DROP;
 382	}
 383
 384	/* Charge it to the socket. */
 385	if (ip_queue_rcv_skb(sk, skb) < 0) {
 386		kfree_skb(skb);
 387		return NET_RX_DROP;
 388	}
 389
 390	return 0;
 391}
 392
 393/*
 394 *	This is next to useless...
 395 *	if we demultiplex in network layer we don't need the extra call
 396 *	just to queue the skb...
 397 *	maybe we could have the network decide upon a hint if it
 398 *	should call raw_rcv for demultiplexing
 399 */
 400int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
 401{
 402	struct inet_sock *inet = inet_sk(sk);
 403	struct raw6_sock *rp = raw6_sk(sk);
 404
 405	if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
 406		atomic_inc(&sk->sk_drops);
 407		kfree_skb(skb);
 408		return NET_RX_DROP;
 409	}
 410
 411	if (!rp->checksum)
 412		skb->ip_summed = CHECKSUM_UNNECESSARY;
 413
 414	if (skb->ip_summed == CHECKSUM_COMPLETE) {
 415		skb_postpull_rcsum(skb, skb_network_header(skb),
 416				   skb_network_header_len(skb));
 417		if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 418				     &ipv6_hdr(skb)->daddr,
 419				     skb->len, inet->inet_num, skb->csum))
 420			skb->ip_summed = CHECKSUM_UNNECESSARY;
 421	}
 422	if (!skb_csum_unnecessary(skb))
 423		skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 424							 &ipv6_hdr(skb)->daddr,
 425							 skb->len,
 426							 inet->inet_num, 0));
 427
 428	if (inet->hdrincl) {
 429		if (skb_checksum_complete(skb)) {
 430			atomic_inc(&sk->sk_drops);
 431			kfree_skb(skb);
 432			return NET_RX_DROP;
 433		}
 434	}
 435
 436	rawv6_rcv_skb(sk, skb);
 437	return 0;
 438}
 439
 440
 441/*
 442 *	This should be easy, if there is something there
 443 *	we return it, otherwise we block.
 444 */
 445
 446static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
 447		  struct msghdr *msg, size_t len,
 448		  int noblock, int flags, int *addr_len)
 449{
 450	struct ipv6_pinfo *np = inet6_sk(sk);
 451	struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
 452	struct sk_buff *skb;
 453	size_t copied;
 454	int err;
 455
 456	if (flags & MSG_OOB)
 457		return -EOPNOTSUPP;
 458
 459	if (addr_len)
 460		*addr_len=sizeof(*sin6);
 461
 462	if (flags & MSG_ERRQUEUE)
 463		return ipv6_recv_error(sk, msg, len);
 464
 465	if (np->rxpmtu && np->rxopt.bits.rxpmtu)
 466		return ipv6_recv_rxpmtu(sk, msg, len);
 467
 468	skb = skb_recv_datagram(sk, flags, noblock, &err);
 469	if (!skb)
 470		goto out;
 471
 472	copied = skb->len;
 473	if (copied > len) {
 474		copied = len;
 475		msg->msg_flags |= MSG_TRUNC;
 476	}
 477
 478	if (skb_csum_unnecessary(skb)) {
 479		err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 480	} else if (msg->msg_flags&MSG_TRUNC) {
 481		if (__skb_checksum_complete(skb))
 482			goto csum_copy_err;
 483		err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 484	} else {
 485		err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
 486		if (err == -EINVAL)
 487			goto csum_copy_err;
 488	}
 489	if (err)
 490		goto out_free;
 491
 492	/* Copy the address. */
 493	if (sin6) {
 494		sin6->sin6_family = AF_INET6;
 495		sin6->sin6_port = 0;
 496		ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr);
 497		sin6->sin6_flowinfo = 0;
 498		sin6->sin6_scope_id = 0;
 499		if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
 500			sin6->sin6_scope_id = IP6CB(skb)->iif;
 501	}
 502
 503	sock_recv_ts_and_drops(msg, sk, skb);
 504
 505	if (np->rxopt.all)
 506		datagram_recv_ctl(sk, msg, skb);
 507
 508	err = copied;
 509	if (flags & MSG_TRUNC)
 510		err = skb->len;
 511
 512out_free:
 513	skb_free_datagram(sk, skb);
 514out:
 515	return err;
 516
 517csum_copy_err:
 518	skb_kill_datagram(sk, skb, flags);
 519
 520	/* Error for blocking case is chosen to masquerade
 521	   as some normal condition.
 522	 */
 523	err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
 524	goto out;
 525}
 526
 527static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
 528				     struct raw6_sock *rp)
 529{
 530	struct sk_buff *skb;
 531	int err = 0;
 532	int offset;
 533	int len;
 534	int total_len;
 535	__wsum tmp_csum;
 536	__sum16 csum;
 537
 538	if (!rp->checksum)
 539		goto send;
 540
 541	if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
 542		goto out;
 543
 544	offset = rp->offset;
 545	total_len = inet_sk(sk)->cork.base.length - (skb_network_header(skb) -
 546						     skb->data);
 547	if (offset >= total_len - 1) {
 548		err = -EINVAL;
 549		ip6_flush_pending_frames(sk);
 550		goto out;
 551	}
 552
 553	/* should be check HW csum miyazawa */
 554	if (skb_queue_len(&sk->sk_write_queue) == 1) {
 555		/*
 556		 * Only one fragment on the socket.
 557		 */
 558		tmp_csum = skb->csum;
 559	} else {
 560		struct sk_buff *csum_skb = NULL;
 561		tmp_csum = 0;
 562
 563		skb_queue_walk(&sk->sk_write_queue, skb) {
 564			tmp_csum = csum_add(tmp_csum, skb->csum);
 565
 566			if (csum_skb)
 567				continue;
 568
 569			len = skb->len - skb_transport_offset(skb);
 570			if (offset >= len) {
 571				offset -= len;
 572				continue;
 573			}
 574
 575			csum_skb = skb;
 576		}
 577
 578		skb = csum_skb;
 579	}
 580
 581	offset += skb_transport_offset(skb);
 582	if (skb_copy_bits(skb, offset, &csum, 2))
 583		BUG();
 584
 585	/* in case cksum was not initialized */
 586	if (unlikely(csum))
 587		tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
 588
 589	csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr,
 590			       total_len, fl6->flowi6_proto, tmp_csum);
 591
 592	if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP)
 593		csum = CSUM_MANGLED_0;
 594
 595	if (skb_store_bits(skb, offset, &csum, 2))
 596		BUG();
 597
 598send:
 599	err = ip6_push_pending_frames(sk);
 600out:
 601	return err;
 602}
 603
 604static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
 605			struct flowi6 *fl6, struct dst_entry **dstp,
 606			unsigned int flags)
 607{
 608	struct ipv6_pinfo *np = inet6_sk(sk);
 609	struct ipv6hdr *iph;
 610	struct sk_buff *skb;
 611	int err;
 612	struct rt6_info *rt = (struct rt6_info *)*dstp;
 613
 614	if (length > rt->dst.dev->mtu) {
 615		ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu);
 616		return -EMSGSIZE;
 617	}
 618	if (flags&MSG_PROBE)
 619		goto out;
 620
 621	skb = sock_alloc_send_skb(sk,
 622				  length + LL_ALLOCATED_SPACE(rt->dst.dev) + 15,
 623				  flags & MSG_DONTWAIT, &err);
 624	if (skb == NULL)
 625		goto error;
 626	skb_reserve(skb, LL_RESERVED_SPACE(rt->dst.dev));
 627
 628	skb->priority = sk->sk_priority;
 629	skb->mark = sk->sk_mark;
 630	skb_dst_set(skb, &rt->dst);
 631	*dstp = NULL;
 632
 633	skb_put(skb, length);
 634	skb_reset_network_header(skb);
 635	iph = ipv6_hdr(skb);
 636
 637	skb->ip_summed = CHECKSUM_NONE;
 638
 639	skb->transport_header = skb->network_header;
 640	err = memcpy_fromiovecend((void *)iph, from, 0, length);
 641	if (err)
 642		goto error_fault;
 643
 644	IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
 645	err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL,
 646		      rt->dst.dev, dst_output);
 647	if (err > 0)
 648		err = net_xmit_errno(err);
 649	if (err)
 650		goto error;
 651out:
 652	return 0;
 653
 654error_fault:
 655	err = -EFAULT;
 656	kfree_skb(skb);
 657error:
 658	IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
 659	if (err == -ENOBUFS && !np->recverr)
 660		err = 0;
 661	return err;
 662}
 663
 664static int rawv6_probe_proto_opt(struct flowi6 *fl6, struct msghdr *msg)
 665{
 666	struct iovec *iov;
 667	u8 __user *type = NULL;
 668	u8 __user *code = NULL;
 669	u8 len = 0;
 670	int probed = 0;
 671	int i;
 672
 673	if (!msg->msg_iov)
 674		return 0;
 675
 676	for (i = 0; i < msg->msg_iovlen; i++) {
 677		iov = &msg->msg_iov[i];
 678		if (!iov)
 679			continue;
 680
 681		switch (fl6->flowi6_proto) {
 682		case IPPROTO_ICMPV6:
 683			/* check if one-byte field is readable or not. */
 684			if (iov->iov_base && iov->iov_len < 1)
 685				break;
 686
 687			if (!type) {
 688				type = iov->iov_base;
 689				/* check if code field is readable or not. */
 690				if (iov->iov_len > 1)
 691					code = type + 1;
 692			} else if (!code)
 693				code = iov->iov_base;
 694
 695			if (type && code) {
 696				if (get_user(fl6->fl6_icmp_type, type) ||
 697				    get_user(fl6->fl6_icmp_code, code))
 698					return -EFAULT;
 699				probed = 1;
 700			}
 701			break;
 702		case IPPROTO_MH:
 703			if (iov->iov_base && iov->iov_len < 1)
 704				break;
 705			/* check if type field is readable or not. */
 706			if (iov->iov_len > 2 - len) {
 707				u8 __user *p = iov->iov_base;
 708				if (get_user(fl6->fl6_mh_type, &p[2 - len]))
 709					return -EFAULT;
 710				probed = 1;
 711			} else
 712				len += iov->iov_len;
 713
 714			break;
 715		default:
 716			probed = 1;
 717			break;
 718		}
 719		if (probed)
 720			break;
 721	}
 722	return 0;
 723}
 724
 725static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
 726		   struct msghdr *msg, size_t len)
 727{
 728	struct ipv6_txoptions opt_space;
 729	struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
 730	struct in6_addr *daddr, *final_p, final;
 731	struct inet_sock *inet = inet_sk(sk);
 732	struct ipv6_pinfo *np = inet6_sk(sk);
 733	struct raw6_sock *rp = raw6_sk(sk);
 734	struct ipv6_txoptions *opt = NULL;
 735	struct ip6_flowlabel *flowlabel = NULL;
 736	struct dst_entry *dst = NULL;
 737	struct flowi6 fl6;
 738	int addr_len = msg->msg_namelen;
 739	int hlimit = -1;
 740	int tclass = -1;
 741	int dontfrag = -1;
 742	u16 proto;
 743	int err;
 744
 745	/* Rough check on arithmetic overflow,
 746	   better check is made in ip6_append_data().
 747	 */
 748	if (len > INT_MAX)
 749		return -EMSGSIZE;
 750
 751	/* Mirror BSD error message compatibility */
 752	if (msg->msg_flags & MSG_OOB)
 753		return -EOPNOTSUPP;
 754
 755	/*
 756	 *	Get and verify the address.
 757	 */
 758	memset(&fl6, 0, sizeof(fl6));
 759
 760	fl6.flowi6_mark = sk->sk_mark;
 761
 762	if (sin6) {
 763		if (addr_len < SIN6_LEN_RFC2133)
 764			return -EINVAL;
 765
 766		if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
 767			return -EAFNOSUPPORT;
 768
 769		/* port is the proto value [0..255] carried in nexthdr */
 770		proto = ntohs(sin6->sin6_port);
 771
 772		if (!proto)
 773			proto = inet->inet_num;
 774		else if (proto != inet->inet_num)
 775			return -EINVAL;
 776
 777		if (proto > 255)
 778			return -EINVAL;
 779
 780		daddr = &sin6->sin6_addr;
 781		if (np->sndflow) {
 782			fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
 783			if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
 784				flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
 785				if (flowlabel == NULL)
 786					return -EINVAL;
 787				daddr = &flowlabel->dst;
 788			}
 789		}
 790
 791		/*
 792		 * Otherwise it will be difficult to maintain
 793		 * sk->sk_dst_cache.
 794		 */
 795		if (sk->sk_state == TCP_ESTABLISHED &&
 796		    ipv6_addr_equal(daddr, &np->daddr))
 797			daddr = &np->daddr;
 798
 799		if (addr_len >= sizeof(struct sockaddr_in6) &&
 800		    sin6->sin6_scope_id &&
 801		    ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
 802			fl6.flowi6_oif = sin6->sin6_scope_id;
 803	} else {
 804		if (sk->sk_state != TCP_ESTABLISHED)
 805			return -EDESTADDRREQ;
 806
 807		proto = inet->inet_num;
 808		daddr = &np->daddr;
 809		fl6.flowlabel = np->flow_label;
 810	}
 811
 812	if (fl6.flowi6_oif == 0)
 813		fl6.flowi6_oif = sk->sk_bound_dev_if;
 814
 815	if (msg->msg_controllen) {
 816		opt = &opt_space;
 817		memset(opt, 0, sizeof(struct ipv6_txoptions));
 818		opt->tot_len = sizeof(struct ipv6_txoptions);
 819
 820		err = datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt,
 821					&hlimit, &tclass, &dontfrag);
 822		if (err < 0) {
 823			fl6_sock_release(flowlabel);
 824			return err;
 825		}
 826		if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
 827			flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
 828			if (flowlabel == NULL)
 829				return -EINVAL;
 830		}
 831		if (!(opt->opt_nflen|opt->opt_flen))
 832			opt = NULL;
 833	}
 834	if (opt == NULL)
 835		opt = np->opt;
 836	if (flowlabel)
 837		opt = fl6_merge_options(&opt_space, flowlabel, opt);
 838	opt = ipv6_fixup_options(&opt_space, opt);
 839
 840	fl6.flowi6_proto = proto;
 841	err = rawv6_probe_proto_opt(&fl6, msg);
 842	if (err)
 843		goto out;
 844
 845	if (!ipv6_addr_any(daddr))
 846		ipv6_addr_copy(&fl6.daddr, daddr);
 847	else
 848		fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
 849	if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
 850		ipv6_addr_copy(&fl6.saddr, &np->saddr);
 851
 852	final_p = fl6_update_dst(&fl6, opt, &final);
 853
 854	if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
 855		fl6.flowi6_oif = np->mcast_oif;
 856	security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
 857
 858	dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true);
 859	if (IS_ERR(dst)) {
 860		err = PTR_ERR(dst);
 861		goto out;
 862	}
 863	if (hlimit < 0) {
 864		if (ipv6_addr_is_multicast(&fl6.daddr))
 865			hlimit = np->mcast_hops;
 866		else
 867			hlimit = np->hop_limit;
 868		if (hlimit < 0)
 869			hlimit = ip6_dst_hoplimit(dst);
 870	}
 871
 872	if (tclass < 0)
 873		tclass = np->tclass;
 874
 875	if (dontfrag < 0)
 876		dontfrag = np->dontfrag;
 877
 878	if (msg->msg_flags&MSG_CONFIRM)
 879		goto do_confirm;
 880
 881back_from_confirm:
 882	if (inet->hdrincl)
 883		err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl6, &dst, msg->msg_flags);
 884	else {
 885		lock_sock(sk);
 886		err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
 887			len, 0, hlimit, tclass, opt, &fl6, (struct rt6_info*)dst,
 888			msg->msg_flags, dontfrag);
 889
 890		if (err)
 891			ip6_flush_pending_frames(sk);
 892		else if (!(msg->msg_flags & MSG_MORE))
 893			err = rawv6_push_pending_frames(sk, &fl6, rp);
 894		release_sock(sk);
 895	}
 896done:
 897	dst_release(dst);
 898out:
 899	fl6_sock_release(flowlabel);
 900	return err<0?err:len;
 901do_confirm:
 902	dst_confirm(dst);
 903	if (!(msg->msg_flags & MSG_PROBE) || len)
 904		goto back_from_confirm;
 905	err = 0;
 906	goto done;
 907}
 908
 909static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
 910			       char __user *optval, int optlen)
 911{
 912	switch (optname) {
 913	case ICMPV6_FILTER:
 914		if (optlen > sizeof(struct icmp6_filter))
 915			optlen = sizeof(struct icmp6_filter);
 916		if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
 917			return -EFAULT;
 918		return 0;
 919	default:
 920		return -ENOPROTOOPT;
 921	}
 922
 923	return 0;
 924}
 925
 926static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
 927			       char __user *optval, int __user *optlen)
 928{
 929	int len;
 930
 931	switch (optname) {
 932	case ICMPV6_FILTER:
 933		if (get_user(len, optlen))
 934			return -EFAULT;
 935		if (len < 0)
 936			return -EINVAL;
 937		if (len > sizeof(struct icmp6_filter))
 938			len = sizeof(struct icmp6_filter);
 939		if (put_user(len, optlen))
 940			return -EFAULT;
 941		if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
 942			return -EFAULT;
 943		return 0;
 944	default:
 945		return -ENOPROTOOPT;
 946	}
 947
 948	return 0;
 949}
 950
 951
 952static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
 953			    char __user *optval, unsigned int optlen)
 954{
 955	struct raw6_sock *rp = raw6_sk(sk);
 956	int val;
 957
 958	if (get_user(val, (int __user *)optval))
 959		return -EFAULT;
 960
 961	switch (optname) {
 962	case IPV6_CHECKSUM:
 963		if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
 964		    level == IPPROTO_IPV6) {
 965			/*
 966			 * RFC3542 tells that IPV6_CHECKSUM socket
 967			 * option in the IPPROTO_IPV6 level is not
 968			 * allowed on ICMPv6 sockets.
 969			 * If you want to set it, use IPPROTO_RAW
 970			 * level IPV6_CHECKSUM socket option
 971			 * (Linux extension).
 972			 */
 973			return -EINVAL;
 974		}
 975
 976		/* You may get strange result with a positive odd offset;
 977		   RFC2292bis agrees with me. */
 978		if (val > 0 && (val&1))
 979			return -EINVAL;
 980		if (val < 0) {
 981			rp->checksum = 0;
 982		} else {
 983			rp->checksum = 1;
 984			rp->offset = val;
 985		}
 986
 987		return 0;
 988
 989	default:
 990		return -ENOPROTOOPT;
 991	}
 992}
 993
 994static int rawv6_setsockopt(struct sock *sk, int level, int optname,
 995			  char __user *optval, unsigned int optlen)
 996{
 997	switch (level) {
 998	case SOL_RAW:
 999		break;
1000
1001	case SOL_ICMPV6:
1002		if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1003			return -EOPNOTSUPP;
1004		return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1005	case SOL_IPV6:
1006		if (optname == IPV6_CHECKSUM)
1007			break;
1008	default:
1009		return ipv6_setsockopt(sk, level, optname, optval, optlen);
1010	}
1011
1012	return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1013}
1014
1015#ifdef CONFIG_COMPAT
1016static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1017				   char __user *optval, unsigned int optlen)
1018{
1019	switch (level) {
1020	case SOL_RAW:
1021		break;
1022	case SOL_ICMPV6:
1023		if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1024			return -EOPNOTSUPP;
1025		return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1026	case SOL_IPV6:
1027		if (optname == IPV6_CHECKSUM)
1028			break;
1029	default:
1030		return compat_ipv6_setsockopt(sk, level, optname,
1031					      optval, optlen);
1032	}
1033	return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1034}
1035#endif
1036
1037static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1038			    char __user *optval, int __user *optlen)
1039{
1040	struct raw6_sock *rp = raw6_sk(sk);
1041	int val, len;
1042
1043	if (get_user(len,optlen))
1044		return -EFAULT;
1045
1046	switch (optname) {
1047	case IPV6_CHECKSUM:
1048		/*
1049		 * We allow getsockopt() for IPPROTO_IPV6-level
1050		 * IPV6_CHECKSUM socket option on ICMPv6 sockets
1051		 * since RFC3542 is silent about it.
1052		 */
1053		if (rp->checksum == 0)
1054			val = -1;
1055		else
1056			val = rp->offset;
1057		break;
1058
1059	default:
1060		return -ENOPROTOOPT;
1061	}
1062
1063	len = min_t(unsigned int, sizeof(int), len);
1064
1065	if (put_user(len, optlen))
1066		return -EFAULT;
1067	if (copy_to_user(optval,&val,len))
1068		return -EFAULT;
1069	return 0;
1070}
1071
1072static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1073			  char __user *optval, int __user *optlen)
1074{
1075	switch (level) {
1076	case SOL_RAW:
1077		break;
1078
1079	case SOL_ICMPV6:
1080		if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1081			return -EOPNOTSUPP;
1082		return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1083	case SOL_IPV6:
1084		if (optname == IPV6_CHECKSUM)
1085			break;
1086	default:
1087		return ipv6_getsockopt(sk, level, optname, optval, optlen);
1088	}
1089
1090	return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1091}
1092
1093#ifdef CONFIG_COMPAT
1094static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1095				   char __user *optval, int __user *optlen)
1096{
1097	switch (level) {
1098	case SOL_RAW:
1099		break;
1100	case SOL_ICMPV6:
1101		if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1102			return -EOPNOTSUPP;
1103		return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1104	case SOL_IPV6:
1105		if (optname == IPV6_CHECKSUM)
1106			break;
1107	default:
1108		return compat_ipv6_getsockopt(sk, level, optname,
1109					      optval, optlen);
1110	}
1111	return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1112}
1113#endif
1114
1115static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1116{
1117	switch (cmd) {
1118	case SIOCOUTQ: {
1119		int amount = sk_wmem_alloc_get(sk);
1120
1121		return put_user(amount, (int __user *)arg);
1122	}
1123	case SIOCINQ: {
1124		struct sk_buff *skb;
1125		int amount = 0;
1126
1127		spin_lock_bh(&sk->sk_receive_queue.lock);
1128		skb = skb_peek(&sk->sk_receive_queue);
1129		if (skb != NULL)
1130			amount = skb->tail - skb->transport_header;
1131		spin_unlock_bh(&sk->sk_receive_queue.lock);
1132		return put_user(amount, (int __user *)arg);
1133	}
1134
1135	default:
1136#ifdef CONFIG_IPV6_MROUTE
1137		return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1138#else
1139		return -ENOIOCTLCMD;
1140#endif
1141	}
1142}
1143
1144#ifdef CONFIG_COMPAT
1145static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
1146{
1147	switch (cmd) {
1148	case SIOCOUTQ:
1149	case SIOCINQ:
1150		return -ENOIOCTLCMD;
1151	default:
1152#ifdef CONFIG_IPV6_MROUTE
1153		return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
1154#else
1155		return -ENOIOCTLCMD;
1156#endif
1157	}
1158}
1159#endif
1160
1161static void rawv6_close(struct sock *sk, long timeout)
1162{
1163	if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1164		ip6_ra_control(sk, -1);
1165	ip6mr_sk_done(sk);
1166	sk_common_release(sk);
1167}
1168
1169static void raw6_destroy(struct sock *sk)
1170{
1171	lock_sock(sk);
1172	ip6_flush_pending_frames(sk);
1173	release_sock(sk);
1174
1175	inet6_destroy_sock(sk);
1176}
1177
1178static int rawv6_init_sk(struct sock *sk)
1179{
1180	struct raw6_sock *rp = raw6_sk(sk);
1181
1182	switch (inet_sk(sk)->inet_num) {
1183	case IPPROTO_ICMPV6:
1184		rp->checksum = 1;
1185		rp->offset   = 2;
1186		break;
1187	case IPPROTO_MH:
1188		rp->checksum = 1;
1189		rp->offset   = 4;
1190		break;
1191	default:
1192		break;
1193	}
1194	return 0;
1195}
1196
1197struct proto rawv6_prot = {
1198	.name		   = "RAWv6",
1199	.owner		   = THIS_MODULE,
1200	.close		   = rawv6_close,
1201	.destroy	   = raw6_destroy,
1202	.connect	   = ip6_datagram_connect,
1203	.disconnect	   = udp_disconnect,
1204	.ioctl		   = rawv6_ioctl,
1205	.init		   = rawv6_init_sk,
1206	.setsockopt	   = rawv6_setsockopt,
1207	.getsockopt	   = rawv6_getsockopt,
1208	.sendmsg	   = rawv6_sendmsg,
1209	.recvmsg	   = rawv6_recvmsg,
1210	.bind		   = rawv6_bind,
1211	.backlog_rcv	   = rawv6_rcv_skb,
1212	.hash		   = raw_hash_sk,
1213	.unhash		   = raw_unhash_sk,
1214	.obj_size	   = sizeof(struct raw6_sock),
1215	.h.raw_hash	   = &raw_v6_hashinfo,
1216#ifdef CONFIG_COMPAT
1217	.compat_setsockopt = compat_rawv6_setsockopt,
1218	.compat_getsockopt = compat_rawv6_getsockopt,
1219	.compat_ioctl	   = compat_rawv6_ioctl,
1220#endif
1221};
1222
1223#ifdef CONFIG_PROC_FS
1224static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1225{
1226	struct ipv6_pinfo *np = inet6_sk(sp);
1227	const struct in6_addr *dest, *src;
1228	__u16 destp, srcp;
1229
1230	dest  = &np->daddr;
1231	src   = &np->rcv_saddr;
1232	destp = 0;
1233	srcp  = inet_sk(sp)->inet_num;
1234	seq_printf(seq,
1235		   "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1236		   "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d\n",
1237		   i,
1238		   src->s6_addr32[0], src->s6_addr32[1],
1239		   src->s6_addr32[2], src->s6_addr32[3], srcp,
1240		   dest->s6_addr32[0], dest->s6_addr32[1],
1241		   dest->s6_addr32[2], dest->s6_addr32[3], destp,
1242		   sp->sk_state,
1243		   sk_wmem_alloc_get(sp),
1244		   sk_rmem_alloc_get(sp),
1245		   0, 0L, 0,
1246		   sock_i_uid(sp), 0,
1247		   sock_i_ino(sp),
1248		   atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1249}
1250
1251static int raw6_seq_show(struct seq_file *seq, void *v)
1252{
1253	if (v == SEQ_START_TOKEN)
1254		seq_printf(seq,
1255			   "  sl  "
1256			   "local_address                         "
1257			   "remote_address                        "
1258			   "st tx_queue rx_queue tr tm->when retrnsmt"
1259			   "   uid  timeout inode ref pointer drops\n");
1260	else
1261		raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1262	return 0;
1263}
1264
1265static const struct seq_operations raw6_seq_ops = {
1266	.start =	raw_seq_start,
1267	.next =		raw_seq_next,
1268	.stop =		raw_seq_stop,
1269	.show =		raw6_seq_show,
1270};
1271
1272static int raw6_seq_open(struct inode *inode, struct file *file)
1273{
1274	return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1275}
1276
1277static const struct file_operations raw6_seq_fops = {
1278	.owner =	THIS_MODULE,
1279	.open =		raw6_seq_open,
1280	.read =		seq_read,
1281	.llseek =	seq_lseek,
1282	.release =	seq_release_net,
1283};
1284
1285static int __net_init raw6_init_net(struct net *net)
1286{
1287	if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops))
1288		return -ENOMEM;
1289
1290	return 0;
1291}
1292
1293static void __net_exit raw6_exit_net(struct net *net)
1294{
1295	proc_net_remove(net, "raw6");
1296}
1297
1298static struct pernet_operations raw6_net_ops = {
1299	.init = raw6_init_net,
1300	.exit = raw6_exit_net,
1301};
1302
1303int __init raw6_proc_init(void)
1304{
1305	return register_pernet_subsys(&raw6_net_ops);
1306}
1307
1308void raw6_proc_exit(void)
1309{
1310	unregister_pernet_subsys(&raw6_net_ops);
1311}
1312#endif	/* CONFIG_PROC_FS */
1313
1314/* Same as inet6_dgram_ops, sans udp_poll.  */
1315static const struct proto_ops inet6_sockraw_ops = {
1316	.family		   = PF_INET6,
1317	.owner		   = THIS_MODULE,
1318	.release	   = inet6_release,
1319	.bind		   = inet6_bind,
1320	.connect	   = inet_dgram_connect,	/* ok		*/
1321	.socketpair	   = sock_no_socketpair,	/* a do nothing	*/
1322	.accept		   = sock_no_accept,		/* a do nothing	*/
1323	.getname	   = inet6_getname,
1324	.poll		   = datagram_poll,		/* ok		*/
1325	.ioctl		   = inet6_ioctl,		/* must change  */
1326	.listen		   = sock_no_listen,		/* ok		*/
1327	.shutdown	   = inet_shutdown,		/* ok		*/
1328	.setsockopt	   = sock_common_setsockopt,	/* ok		*/
1329	.getsockopt	   = sock_common_getsockopt,	/* ok		*/
1330	.sendmsg	   = inet_sendmsg,		/* ok		*/
1331	.recvmsg	   = sock_common_recvmsg,	/* ok		*/
1332	.mmap		   = sock_no_mmap,
1333	.sendpage	   = sock_no_sendpage,
1334#ifdef CONFIG_COMPAT
1335	.compat_setsockopt = compat_sock_common_setsockopt,
1336	.compat_getsockopt = compat_sock_common_getsockopt,
1337#endif
1338};
1339
1340static struct inet_protosw rawv6_protosw = {
1341	.type		= SOCK_RAW,
1342	.protocol	= IPPROTO_IP,	/* wild card */
1343	.prot		= &rawv6_prot,
1344	.ops		= &inet6_sockraw_ops,
1345	.no_check	= UDP_CSUM_DEFAULT,
1346	.flags		= INET_PROTOSW_REUSE,
1347};
1348
1349int __init rawv6_init(void)
1350{
1351	int ret;
1352
1353	ret = inet6_register_protosw(&rawv6_protosw);
1354	if (ret)
1355		goto out;
1356out:
1357	return ret;
1358}
1359
1360void rawv6_exit(void)
1361{
1362	inet6_unregister_protosw(&rawv6_protosw);
1363}