xref: /openbmc/linux/net/ipv6/raw.c (revision 9d56dd3b083a3bec56e9da35ce07baca81030b03)
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)->inet_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 	rcu_read_lock();
261 	/* Check if the address belongs to the host. */
262 	if (addr_type != IPV6_ADDR_ANY) {
263 		struct net_device *dev = NULL;
264 
265 		if (addr_type & IPV6_ADDR_LINKLOCAL) {
266 			if (addr_len >= sizeof(struct sockaddr_in6) &&
267 			    addr->sin6_scope_id) {
268 				/* Override any existing binding, if another
269 				 * one is supplied by user.
270 				 */
271 				sk->sk_bound_dev_if = addr->sin6_scope_id;
272 			}
273 
274 			/* Binding to link-local address requires an interface */
275 			if (!sk->sk_bound_dev_if)
276 				goto out_unlock;
277 
278 			err = -ENODEV;
279 			dev = dev_get_by_index_rcu(sock_net(sk),
280 						   sk->sk_bound_dev_if);
281 			if (!dev)
282 				goto out_unlock;
283 		}
284 
285 		/* ipv4 addr of the socket is invalid.  Only the
286 		 * unspecified and mapped address have a v4 equivalent.
287 		 */
288 		v4addr = LOOPBACK4_IPV6;
289 		if (!(addr_type & IPV6_ADDR_MULTICAST))	{
290 			err = -EADDRNOTAVAIL;
291 			if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
292 					   dev, 0)) {
293 				goto out_unlock;
294 			}
295 		}
296 	}
297 
298 	inet->inet_rcv_saddr = inet->inet_saddr = v4addr;
299 	ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
300 	if (!(addr_type & IPV6_ADDR_MULTICAST))
301 		ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
302 	err = 0;
303 out_unlock:
304 	rcu_read_unlock();
305 out:
306 	release_sock(sk);
307 	return err;
308 }
309 
310 static void rawv6_err(struct sock *sk, struct sk_buff *skb,
311 	       struct inet6_skb_parm *opt,
312 	       u8 type, u8 code, int offset, __be32 info)
313 {
314 	struct inet_sock *inet = inet_sk(sk);
315 	struct ipv6_pinfo *np = inet6_sk(sk);
316 	int err;
317 	int harderr;
318 
319 	/* Report error on raw socket, if:
320 	   1. User requested recverr.
321 	   2. Socket is connected (otherwise the error indication
322 	      is useless without recverr and error is hard.
323 	 */
324 	if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
325 		return;
326 
327 	harderr = icmpv6_err_convert(type, code, &err);
328 	if (type == ICMPV6_PKT_TOOBIG)
329 		harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
330 
331 	if (np->recverr) {
332 		u8 *payload = skb->data;
333 		if (!inet->hdrincl)
334 			payload += offset;
335 		ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
336 	}
337 
338 	if (np->recverr || harderr) {
339 		sk->sk_err = err;
340 		sk->sk_error_report(sk);
341 	}
342 }
343 
344 void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
345 		u8 type, u8 code, int inner_offset, __be32 info)
346 {
347 	struct sock *sk;
348 	int hash;
349 	struct in6_addr *saddr, *daddr;
350 	struct net *net;
351 
352 	hash = nexthdr & (RAW_HTABLE_SIZE - 1);
353 
354 	read_lock(&raw_v6_hashinfo.lock);
355 	sk = sk_head(&raw_v6_hashinfo.ht[hash]);
356 	if (sk != NULL) {
357 		/* Note: ipv6_hdr(skb) != skb->data */
358 		struct ipv6hdr *ip6h = (struct ipv6hdr *)skb->data;
359 		saddr = &ip6h->saddr;
360 		daddr = &ip6h->daddr;
361 		net = dev_net(skb->dev);
362 
363 		while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
364 						IP6CB(skb)->iif))) {
365 			rawv6_err(sk, skb, NULL, type, code,
366 					inner_offset, info);
367 			sk = sk_next(sk);
368 		}
369 	}
370 	read_unlock(&raw_v6_hashinfo.lock);
371 }
372 
373 static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
374 {
375 	if ((raw6_sk(sk)->checksum || sk->sk_filter) &&
376 	    skb_checksum_complete(skb)) {
377 		atomic_inc(&sk->sk_drops);
378 		kfree_skb(skb);
379 		return NET_RX_DROP;
380 	}
381 
382 	/* Charge it to the socket. */
383 	if (sock_queue_rcv_skb(sk, skb) < 0) {
384 		kfree_skb(skb);
385 		return NET_RX_DROP;
386 	}
387 
388 	return 0;
389 }
390 
391 /*
392  *	This is next to useless...
393  *	if we demultiplex in network layer we don't need the extra call
394  *	just to queue the skb...
395  *	maybe we could have the network decide upon a hint if it
396  *	should call raw_rcv for demultiplexing
397  */
398 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
399 {
400 	struct inet_sock *inet = inet_sk(sk);
401 	struct raw6_sock *rp = raw6_sk(sk);
402 
403 	if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
404 		atomic_inc(&sk->sk_drops);
405 		kfree_skb(skb);
406 		return NET_RX_DROP;
407 	}
408 
409 	if (!rp->checksum)
410 		skb->ip_summed = CHECKSUM_UNNECESSARY;
411 
412 	if (skb->ip_summed == CHECKSUM_COMPLETE) {
413 		skb_postpull_rcsum(skb, skb_network_header(skb),
414 				   skb_network_header_len(skb));
415 		if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
416 				     &ipv6_hdr(skb)->daddr,
417 				     skb->len, inet->inet_num, skb->csum))
418 			skb->ip_summed = CHECKSUM_UNNECESSARY;
419 	}
420 	if (!skb_csum_unnecessary(skb))
421 		skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
422 							 &ipv6_hdr(skb)->daddr,
423 							 skb->len,
424 							 inet->inet_num, 0));
425 
426 	if (inet->hdrincl) {
427 		if (skb_checksum_complete(skb)) {
428 			atomic_inc(&sk->sk_drops);
429 			kfree_skb(skb);
430 			return NET_RX_DROP;
431 		}
432 	}
433 
434 	rawv6_rcv_skb(sk, skb);
435 	return 0;
436 }
437 
438 
439 /*
440  *	This should be easy, if there is something there
441  *	we return it, otherwise we block.
442  */
443 
444 static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
445 		  struct msghdr *msg, size_t len,
446 		  int noblock, int flags, int *addr_len)
447 {
448 	struct ipv6_pinfo *np = inet6_sk(sk);
449 	struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
450 	struct sk_buff *skb;
451 	size_t copied;
452 	int err;
453 
454 	if (flags & MSG_OOB)
455 		return -EOPNOTSUPP;
456 
457 	if (addr_len)
458 		*addr_len=sizeof(*sin6);
459 
460 	if (flags & MSG_ERRQUEUE)
461 		return ipv6_recv_error(sk, msg, len);
462 
463 	skb = skb_recv_datagram(sk, flags, noblock, &err);
464 	if (!skb)
465 		goto out;
466 
467 	copied = skb->len;
468 	if (copied > len) {
469 		copied = len;
470 		msg->msg_flags |= MSG_TRUNC;
471 	}
472 
473 	if (skb_csum_unnecessary(skb)) {
474 		err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
475 	} else if (msg->msg_flags&MSG_TRUNC) {
476 		if (__skb_checksum_complete(skb))
477 			goto csum_copy_err;
478 		err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
479 	} else {
480 		err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
481 		if (err == -EINVAL)
482 			goto csum_copy_err;
483 	}
484 	if (err)
485 		goto out_free;
486 
487 	/* Copy the address. */
488 	if (sin6) {
489 		sin6->sin6_family = AF_INET6;
490 		sin6->sin6_port = 0;
491 		ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr);
492 		sin6->sin6_flowinfo = 0;
493 		sin6->sin6_scope_id = 0;
494 		if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
495 			sin6->sin6_scope_id = IP6CB(skb)->iif;
496 	}
497 
498 	sock_recv_ts_and_drops(msg, sk, skb);
499 
500 	if (np->rxopt.all)
501 		datagram_recv_ctl(sk, msg, skb);
502 
503 	err = copied;
504 	if (flags & MSG_TRUNC)
505 		err = skb->len;
506 
507 out_free:
508 	skb_free_datagram(sk, skb);
509 out:
510 	return err;
511 
512 csum_copy_err:
513 	skb_kill_datagram(sk, skb, flags);
514 
515 	/* Error for blocking case is chosen to masquerade
516 	   as some normal condition.
517 	 */
518 	err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
519 	goto out;
520 }
521 
522 static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
523 				     struct raw6_sock *rp)
524 {
525 	struct sk_buff *skb;
526 	int err = 0;
527 	int offset;
528 	int len;
529 	int total_len;
530 	__wsum tmp_csum;
531 	__sum16 csum;
532 
533 	if (!rp->checksum)
534 		goto send;
535 
536 	if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
537 		goto out;
538 
539 	offset = rp->offset;
540 	total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) -
541 						skb->data);
542 	if (offset >= total_len - 1) {
543 		err = -EINVAL;
544 		ip6_flush_pending_frames(sk);
545 		goto out;
546 	}
547 
548 	/* should be check HW csum miyazawa */
549 	if (skb_queue_len(&sk->sk_write_queue) == 1) {
550 		/*
551 		 * Only one fragment on the socket.
552 		 */
553 		tmp_csum = skb->csum;
554 	} else {
555 		struct sk_buff *csum_skb = NULL;
556 		tmp_csum = 0;
557 
558 		skb_queue_walk(&sk->sk_write_queue, skb) {
559 			tmp_csum = csum_add(tmp_csum, skb->csum);
560 
561 			if (csum_skb)
562 				continue;
563 
564 			len = skb->len - skb_transport_offset(skb);
565 			if (offset >= len) {
566 				offset -= len;
567 				continue;
568 			}
569 
570 			csum_skb = skb;
571 		}
572 
573 		skb = csum_skb;
574 	}
575 
576 	offset += skb_transport_offset(skb);
577 	if (skb_copy_bits(skb, offset, &csum, 2))
578 		BUG();
579 
580 	/* in case cksum was not initialized */
581 	if (unlikely(csum))
582 		tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
583 
584 	csum = csum_ipv6_magic(&fl->fl6_src,
585 				   &fl->fl6_dst,
586 				   total_len, fl->proto, tmp_csum);
587 
588 	if (csum == 0 && fl->proto == IPPROTO_UDP)
589 		csum = CSUM_MANGLED_0;
590 
591 	if (skb_store_bits(skb, offset, &csum, 2))
592 		BUG();
593 
594 send:
595 	err = ip6_push_pending_frames(sk);
596 out:
597 	return err;
598 }
599 
600 static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
601 			struct flowi *fl, struct rt6_info *rt,
602 			unsigned int flags)
603 {
604 	struct ipv6_pinfo *np = inet6_sk(sk);
605 	struct ipv6hdr *iph;
606 	struct sk_buff *skb;
607 	int err;
608 
609 	if (length > rt->u.dst.dev->mtu) {
610 		ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
611 		return -EMSGSIZE;
612 	}
613 	if (flags&MSG_PROBE)
614 		goto out;
615 
616 	skb = sock_alloc_send_skb(sk,
617 				  length + LL_ALLOCATED_SPACE(rt->u.dst.dev) + 15,
618 				  flags & MSG_DONTWAIT, &err);
619 	if (skb == NULL)
620 		goto error;
621 	skb_reserve(skb, LL_RESERVED_SPACE(rt->u.dst.dev));
622 
623 	skb->priority = sk->sk_priority;
624 	skb->mark = sk->sk_mark;
625 	skb_dst_set(skb, dst_clone(&rt->u.dst));
626 
627 	skb_put(skb, length);
628 	skb_reset_network_header(skb);
629 	iph = ipv6_hdr(skb);
630 
631 	skb->ip_summed = CHECKSUM_NONE;
632 
633 	skb->transport_header = skb->network_header;
634 	err = memcpy_fromiovecend((void *)iph, from, 0, length);
635 	if (err)
636 		goto error_fault;
637 
638 	IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
639 	err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
640 		      dst_output);
641 	if (err > 0)
642 		err = net_xmit_errno(err);
643 	if (err)
644 		goto error;
645 out:
646 	return 0;
647 
648 error_fault:
649 	err = -EFAULT;
650 	kfree_skb(skb);
651 error:
652 	IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
653 	if (err == -ENOBUFS && !np->recverr)
654 		err = 0;
655 	return err;
656 }
657 
658 static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
659 {
660 	struct iovec *iov;
661 	u8 __user *type = NULL;
662 	u8 __user *code = NULL;
663 	u8 len = 0;
664 	int probed = 0;
665 	int i;
666 
667 	if (!msg->msg_iov)
668 		return 0;
669 
670 	for (i = 0; i < msg->msg_iovlen; i++) {
671 		iov = &msg->msg_iov[i];
672 		if (!iov)
673 			continue;
674 
675 		switch (fl->proto) {
676 		case IPPROTO_ICMPV6:
677 			/* check if one-byte field is readable or not. */
678 			if (iov->iov_base && iov->iov_len < 1)
679 				break;
680 
681 			if (!type) {
682 				type = iov->iov_base;
683 				/* check if code field is readable or not. */
684 				if (iov->iov_len > 1)
685 					code = type + 1;
686 			} else if (!code)
687 				code = iov->iov_base;
688 
689 			if (type && code) {
690 				if (get_user(fl->fl_icmp_type, type) ||
691 				    get_user(fl->fl_icmp_code, code))
692 					return -EFAULT;
693 				probed = 1;
694 			}
695 			break;
696 		case IPPROTO_MH:
697 			if (iov->iov_base && iov->iov_len < 1)
698 				break;
699 			/* check if type field is readable or not. */
700 			if (iov->iov_len > 2 - len) {
701 				u8 __user *p = iov->iov_base;
702 				if (get_user(fl->fl_mh_type, &p[2 - len]))
703 					return -EFAULT;
704 				probed = 1;
705 			} else
706 				len += iov->iov_len;
707 
708 			break;
709 		default:
710 			probed = 1;
711 			break;
712 		}
713 		if (probed)
714 			break;
715 	}
716 	return 0;
717 }
718 
719 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
720 		   struct msghdr *msg, size_t len)
721 {
722 	struct ipv6_txoptions opt_space;
723 	struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
724 	struct in6_addr *daddr, *final_p = NULL, final;
725 	struct inet_sock *inet = inet_sk(sk);
726 	struct ipv6_pinfo *np = inet6_sk(sk);
727 	struct raw6_sock *rp = raw6_sk(sk);
728 	struct ipv6_txoptions *opt = NULL;
729 	struct ip6_flowlabel *flowlabel = NULL;
730 	struct dst_entry *dst = NULL;
731 	struct flowi fl;
732 	int addr_len = msg->msg_namelen;
733 	int hlimit = -1;
734 	int tclass = -1;
735 	u16 proto;
736 	int err;
737 
738 	/* Rough check on arithmetic overflow,
739 	   better check is made in ip6_append_data().
740 	 */
741 	if (len > INT_MAX)
742 		return -EMSGSIZE;
743 
744 	/* Mirror BSD error message compatibility */
745 	if (msg->msg_flags & MSG_OOB)
746 		return -EOPNOTSUPP;
747 
748 	/*
749 	 *	Get and verify the address.
750 	 */
751 	memset(&fl, 0, sizeof(fl));
752 
753 	fl.mark = sk->sk_mark;
754 
755 	if (sin6) {
756 		if (addr_len < SIN6_LEN_RFC2133)
757 			return -EINVAL;
758 
759 		if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
760 			return(-EAFNOSUPPORT);
761 
762 		/* port is the proto value [0..255] carried in nexthdr */
763 		proto = ntohs(sin6->sin6_port);
764 
765 		if (!proto)
766 			proto = inet->inet_num;
767 		else if (proto != inet->inet_num)
768 			return(-EINVAL);
769 
770 		if (proto > 255)
771 			return(-EINVAL);
772 
773 		daddr = &sin6->sin6_addr;
774 		if (np->sndflow) {
775 			fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
776 			if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
777 				flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
778 				if (flowlabel == NULL)
779 					return -EINVAL;
780 				daddr = &flowlabel->dst;
781 			}
782 		}
783 
784 		/*
785 		 * Otherwise it will be difficult to maintain
786 		 * sk->sk_dst_cache.
787 		 */
788 		if (sk->sk_state == TCP_ESTABLISHED &&
789 		    ipv6_addr_equal(daddr, &np->daddr))
790 			daddr = &np->daddr;
791 
792 		if (addr_len >= sizeof(struct sockaddr_in6) &&
793 		    sin6->sin6_scope_id &&
794 		    ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
795 			fl.oif = sin6->sin6_scope_id;
796 	} else {
797 		if (sk->sk_state != TCP_ESTABLISHED)
798 			return -EDESTADDRREQ;
799 
800 		proto = inet->inet_num;
801 		daddr = &np->daddr;
802 		fl.fl6_flowlabel = np->flow_label;
803 	}
804 
805 	if (fl.oif == 0)
806 		fl.oif = sk->sk_bound_dev_if;
807 
808 	if (msg->msg_controllen) {
809 		opt = &opt_space;
810 		memset(opt, 0, sizeof(struct ipv6_txoptions));
811 		opt->tot_len = sizeof(struct ipv6_txoptions);
812 
813 		err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass);
814 		if (err < 0) {
815 			fl6_sock_release(flowlabel);
816 			return err;
817 		}
818 		if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
819 			flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
820 			if (flowlabel == NULL)
821 				return -EINVAL;
822 		}
823 		if (!(opt->opt_nflen|opt->opt_flen))
824 			opt = NULL;
825 	}
826 	if (opt == NULL)
827 		opt = np->opt;
828 	if (flowlabel)
829 		opt = fl6_merge_options(&opt_space, flowlabel, opt);
830 	opt = ipv6_fixup_options(&opt_space, opt);
831 
832 	fl.proto = proto;
833 	err = rawv6_probe_proto_opt(&fl, msg);
834 	if (err)
835 		goto out;
836 
837 	if (!ipv6_addr_any(daddr))
838 		ipv6_addr_copy(&fl.fl6_dst, daddr);
839 	else
840 		fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
841 	if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
842 		ipv6_addr_copy(&fl.fl6_src, &np->saddr);
843 
844 	/* merge ip6_build_xmit from ip6_output */
845 	if (opt && opt->srcrt) {
846 		struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
847 		ipv6_addr_copy(&final, &fl.fl6_dst);
848 		ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
849 		final_p = &final;
850 	}
851 
852 	if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
853 		fl.oif = np->mcast_oif;
854 	security_sk_classify_flow(sk, &fl);
855 
856 	err = ip6_dst_lookup(sk, &dst, &fl);
857 	if (err)
858 		goto out;
859 	if (final_p)
860 		ipv6_addr_copy(&fl.fl6_dst, final_p);
861 
862 	err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT);
863 	if (err < 0) {
864 		if (err == -EREMOTE)
865 			err = ip6_dst_blackhole(sk, &dst, &fl);
866 		if (err < 0)
867 			goto out;
868 	}
869 
870 	if (hlimit < 0) {
871 		if (ipv6_addr_is_multicast(&fl.fl6_dst))
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 (msg->msg_flags&MSG_CONFIRM)
883 		goto do_confirm;
884 
885 back_from_confirm:
886 	if (inet->hdrincl) {
887 		err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
888 	} else {
889 		lock_sock(sk);
890 		err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
891 			len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
892 			msg->msg_flags);
893 
894 		if (err)
895 			ip6_flush_pending_frames(sk);
896 		else if (!(msg->msg_flags & MSG_MORE))
897 			err = rawv6_push_pending_frames(sk, &fl, rp);
898 		release_sock(sk);
899 	}
900 done:
901 	dst_release(dst);
902 out:
903 	fl6_sock_release(flowlabel);
904 	return err<0?err:len;
905 do_confirm:
906 	dst_confirm(dst);
907 	if (!(msg->msg_flags & MSG_PROBE) || len)
908 		goto back_from_confirm;
909 	err = 0;
910 	goto done;
911 }
912 
913 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
914 			       char __user *optval, int optlen)
915 {
916 	switch (optname) {
917 	case ICMPV6_FILTER:
918 		if (optlen > sizeof(struct icmp6_filter))
919 			optlen = sizeof(struct icmp6_filter);
920 		if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
921 			return -EFAULT;
922 		return 0;
923 	default:
924 		return -ENOPROTOOPT;
925 	}
926 
927 	return 0;
928 }
929 
930 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
931 			       char __user *optval, int __user *optlen)
932 {
933 	int len;
934 
935 	switch (optname) {
936 	case ICMPV6_FILTER:
937 		if (get_user(len, optlen))
938 			return -EFAULT;
939 		if (len < 0)
940 			return -EINVAL;
941 		if (len > sizeof(struct icmp6_filter))
942 			len = sizeof(struct icmp6_filter);
943 		if (put_user(len, optlen))
944 			return -EFAULT;
945 		if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
946 			return -EFAULT;
947 		return 0;
948 	default:
949 		return -ENOPROTOOPT;
950 	}
951 
952 	return 0;
953 }
954 
955 
956 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
957 			    char __user *optval, unsigned int optlen)
958 {
959 	struct raw6_sock *rp = raw6_sk(sk);
960 	int val;
961 
962 	if (get_user(val, (int __user *)optval))
963 		return -EFAULT;
964 
965 	switch (optname) {
966 		case IPV6_CHECKSUM:
967 			if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
968 			    level == IPPROTO_IPV6) {
969 				/*
970 				 * RFC3542 tells that IPV6_CHECKSUM socket
971 				 * option in the IPPROTO_IPV6 level is not
972 				 * allowed on ICMPv6 sockets.
973 				 * If you want to set it, use IPPROTO_RAW
974 				 * level IPV6_CHECKSUM socket option
975 				 * (Linux extension).
976 				 */
977 				return -EINVAL;
978 			}
979 
980 			/* You may get strange result with a positive odd offset;
981 			   RFC2292bis agrees with me. */
982 			if (val > 0 && (val&1))
983 				return(-EINVAL);
984 			if (val < 0) {
985 				rp->checksum = 0;
986 			} else {
987 				rp->checksum = 1;
988 				rp->offset = val;
989 			}
990 
991 			return 0;
992 			break;
993 
994 		default:
995 			return(-ENOPROTOOPT);
996 	}
997 }
998 
999 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1000 			  char __user *optval, unsigned int optlen)
1001 {
1002 	switch(level) {
1003 		case SOL_RAW:
1004 			break;
1005 
1006 		case SOL_ICMPV6:
1007 			if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1008 				return -EOPNOTSUPP;
1009 			return rawv6_seticmpfilter(sk, level, optname, optval,
1010 						   optlen);
1011 		case SOL_IPV6:
1012 			if (optname == IPV6_CHECKSUM)
1013 				break;
1014 		default:
1015 			return ipv6_setsockopt(sk, level, optname, optval,
1016 					       optlen);
1017 	}
1018 
1019 	return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1020 }
1021 
1022 #ifdef CONFIG_COMPAT
1023 static 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 
1044 static 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 
1079 static 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,
1090 						   optlen);
1091 		case SOL_IPV6:
1092 			if (optname == IPV6_CHECKSUM)
1093 				break;
1094 		default:
1095 			return ipv6_getsockopt(sk, level, optname, optval,
1096 					       optlen);
1097 	}
1098 
1099 	return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1100 }
1101 
1102 #ifdef CONFIG_COMPAT
1103 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1104 				   char __user *optval, int __user *optlen)
1105 {
1106 	switch (level) {
1107 	case SOL_RAW:
1108 		break;
1109 	case SOL_ICMPV6:
1110 		if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1111 			return -EOPNOTSUPP;
1112 		return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1113 	case SOL_IPV6:
1114 		if (optname == IPV6_CHECKSUM)
1115 			break;
1116 	default:
1117 		return compat_ipv6_getsockopt(sk, level, optname,
1118 					      optval, optlen);
1119 	}
1120 	return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1121 }
1122 #endif
1123 
1124 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1125 {
1126 	switch(cmd) {
1127 		case SIOCOUTQ:
1128 		{
1129 			int amount = sk_wmem_alloc_get(sk);
1130 
1131 			return put_user(amount, (int __user *)arg);
1132 		}
1133 		case SIOCINQ:
1134 		{
1135 			struct sk_buff *skb;
1136 			int amount = 0;
1137 
1138 			spin_lock_bh(&sk->sk_receive_queue.lock);
1139 			skb = skb_peek(&sk->sk_receive_queue);
1140 			if (skb != NULL)
1141 				amount = skb->tail - skb->transport_header;
1142 			spin_unlock_bh(&sk->sk_receive_queue.lock);
1143 			return put_user(amount, (int __user *)arg);
1144 		}
1145 
1146 		default:
1147 #ifdef CONFIG_IPV6_MROUTE
1148 			return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1149 #else
1150 			return -ENOIOCTLCMD;
1151 #endif
1152 	}
1153 }
1154 
1155 static void rawv6_close(struct sock *sk, long timeout)
1156 {
1157 	if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1158 		ip6_ra_control(sk, -1);
1159 	ip6mr_sk_done(sk);
1160 	sk_common_release(sk);
1161 }
1162 
1163 static void raw6_destroy(struct sock *sk)
1164 {
1165 	lock_sock(sk);
1166 	ip6_flush_pending_frames(sk);
1167 	release_sock(sk);
1168 
1169 	inet6_destroy_sock(sk);
1170 }
1171 
1172 static int rawv6_init_sk(struct sock *sk)
1173 {
1174 	struct raw6_sock *rp = raw6_sk(sk);
1175 
1176 	switch (inet_sk(sk)->inet_num) {
1177 	case IPPROTO_ICMPV6:
1178 		rp->checksum = 1;
1179 		rp->offset   = 2;
1180 		break;
1181 	case IPPROTO_MH:
1182 		rp->checksum = 1;
1183 		rp->offset   = 4;
1184 		break;
1185 	default:
1186 		break;
1187 	}
1188 	return(0);
1189 }
1190 
1191 struct proto rawv6_prot = {
1192 	.name		   = "RAWv6",
1193 	.owner		   = THIS_MODULE,
1194 	.close		   = rawv6_close,
1195 	.destroy	   = raw6_destroy,
1196 	.connect	   = ip6_datagram_connect,
1197 	.disconnect	   = udp_disconnect,
1198 	.ioctl		   = rawv6_ioctl,
1199 	.init		   = rawv6_init_sk,
1200 	.setsockopt	   = rawv6_setsockopt,
1201 	.getsockopt	   = rawv6_getsockopt,
1202 	.sendmsg	   = rawv6_sendmsg,
1203 	.recvmsg	   = rawv6_recvmsg,
1204 	.bind		   = rawv6_bind,
1205 	.backlog_rcv	   = rawv6_rcv_skb,
1206 	.hash		   = raw_hash_sk,
1207 	.unhash		   = raw_unhash_sk,
1208 	.obj_size	   = sizeof(struct raw6_sock),
1209 	.h.raw_hash	   = &raw_v6_hashinfo,
1210 #ifdef CONFIG_COMPAT
1211 	.compat_setsockopt = compat_rawv6_setsockopt,
1212 	.compat_getsockopt = compat_rawv6_getsockopt,
1213 #endif
1214 };
1215 
1216 #ifdef CONFIG_PROC_FS
1217 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1218 {
1219 	struct ipv6_pinfo *np = inet6_sk(sp);
1220 	struct in6_addr *dest, *src;
1221 	__u16 destp, srcp;
1222 
1223 	dest  = &np->daddr;
1224 	src   = &np->rcv_saddr;
1225 	destp = 0;
1226 	srcp  = inet_sk(sp)->inet_num;
1227 	seq_printf(seq,
1228 		   "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1229 		   "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
1230 		   i,
1231 		   src->s6_addr32[0], src->s6_addr32[1],
1232 		   src->s6_addr32[2], src->s6_addr32[3], srcp,
1233 		   dest->s6_addr32[0], dest->s6_addr32[1],
1234 		   dest->s6_addr32[2], dest->s6_addr32[3], destp,
1235 		   sp->sk_state,
1236 		   sk_wmem_alloc_get(sp),
1237 		   sk_rmem_alloc_get(sp),
1238 		   0, 0L, 0,
1239 		   sock_i_uid(sp), 0,
1240 		   sock_i_ino(sp),
1241 		   atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1242 }
1243 
1244 static int raw6_seq_show(struct seq_file *seq, void *v)
1245 {
1246 	if (v == SEQ_START_TOKEN)
1247 		seq_printf(seq,
1248 			   "  sl  "
1249 			   "local_address                         "
1250 			   "remote_address                        "
1251 			   "st tx_queue rx_queue tr tm->when retrnsmt"
1252 			   "   uid  timeout inode ref pointer drops\n");
1253 	else
1254 		raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1255 	return 0;
1256 }
1257 
1258 static const struct seq_operations raw6_seq_ops = {
1259 	.start =	raw_seq_start,
1260 	.next =		raw_seq_next,
1261 	.stop =		raw_seq_stop,
1262 	.show =		raw6_seq_show,
1263 };
1264 
1265 static int raw6_seq_open(struct inode *inode, struct file *file)
1266 {
1267 	return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1268 }
1269 
1270 static const struct file_operations raw6_seq_fops = {
1271 	.owner =	THIS_MODULE,
1272 	.open =		raw6_seq_open,
1273 	.read =		seq_read,
1274 	.llseek =	seq_lseek,
1275 	.release =	seq_release_net,
1276 };
1277 
1278 static int raw6_init_net(struct net *net)
1279 {
1280 	if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops))
1281 		return -ENOMEM;
1282 
1283 	return 0;
1284 }
1285 
1286 static void raw6_exit_net(struct net *net)
1287 {
1288 	proc_net_remove(net, "raw6");
1289 }
1290 
1291 static struct pernet_operations raw6_net_ops = {
1292 	.init = raw6_init_net,
1293 	.exit = raw6_exit_net,
1294 };
1295 
1296 int __init raw6_proc_init(void)
1297 {
1298 	return register_pernet_subsys(&raw6_net_ops);
1299 }
1300 
1301 void raw6_proc_exit(void)
1302 {
1303 	unregister_pernet_subsys(&raw6_net_ops);
1304 }
1305 #endif	/* CONFIG_PROC_FS */
1306 
1307 /* Same as inet6_dgram_ops, sans udp_poll.  */
1308 static const struct proto_ops inet6_sockraw_ops = {
1309 	.family		   = PF_INET6,
1310 	.owner		   = THIS_MODULE,
1311 	.release	   = inet6_release,
1312 	.bind		   = inet6_bind,
1313 	.connect	   = inet_dgram_connect,	/* ok		*/
1314 	.socketpair	   = sock_no_socketpair,	/* a do nothing	*/
1315 	.accept		   = sock_no_accept,		/* a do nothing	*/
1316 	.getname	   = inet6_getname,
1317 	.poll		   = datagram_poll,		/* ok		*/
1318 	.ioctl		   = inet6_ioctl,		/* must change  */
1319 	.listen		   = sock_no_listen,		/* ok		*/
1320 	.shutdown	   = inet_shutdown,		/* ok		*/
1321 	.setsockopt	   = sock_common_setsockopt,	/* ok		*/
1322 	.getsockopt	   = sock_common_getsockopt,	/* ok		*/
1323 	.sendmsg	   = inet_sendmsg,		/* ok		*/
1324 	.recvmsg	   = sock_common_recvmsg,	/* ok		*/
1325 	.mmap		   = sock_no_mmap,
1326 	.sendpage	   = sock_no_sendpage,
1327 #ifdef CONFIG_COMPAT
1328 	.compat_setsockopt = compat_sock_common_setsockopt,
1329 	.compat_getsockopt = compat_sock_common_getsockopt,
1330 #endif
1331 };
1332 
1333 static struct inet_protosw rawv6_protosw = {
1334 	.type		= SOCK_RAW,
1335 	.protocol	= IPPROTO_IP,	/* wild card */
1336 	.prot		= &rawv6_prot,
1337 	.ops		= &inet6_sockraw_ops,
1338 	.no_check	= UDP_CSUM_DEFAULT,
1339 	.flags		= INET_PROTOSW_REUSE,
1340 };
1341 
1342 int __init rawv6_init(void)
1343 {
1344 	int ret;
1345 
1346 	ret = inet6_register_protosw(&rawv6_protosw);
1347 	if (ret)
1348 		goto out;
1349 out:
1350 	return ret;
1351 }
1352 
1353 void rawv6_exit(void)
1354 {
1355 	inet6_unregister_protosw(&rawv6_protosw);
1356 }
1357