xref: /openbmc/linux/net/ipv6/raw.c (revision f7c35abe)
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 <linux/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 IS_ENABLED(CONFIG_IPV6_MIP6)
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 
66 #define	ICMPV6_HDRLEN	4	/* ICMPv6 header, RFC 4443 Section 2.1 */
67 
68 struct raw_hashinfo raw_v6_hashinfo = {
69 	.lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
70 };
71 EXPORT_SYMBOL_GPL(raw_v6_hashinfo);
72 
73 struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
74 		unsigned short num, const struct in6_addr *loc_addr,
75 		const struct in6_addr *rmt_addr, int dif)
76 {
77 	bool is_multicast = ipv6_addr_is_multicast(loc_addr);
78 
79 	sk_for_each_from(sk)
80 		if (inet_sk(sk)->inet_num == num) {
81 
82 			if (!net_eq(sock_net(sk), net))
83 				continue;
84 
85 			if (!ipv6_addr_any(&sk->sk_v6_daddr) &&
86 			    !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr))
87 				continue;
88 
89 			if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
90 				continue;
91 
92 			if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) {
93 				if (ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr))
94 					goto found;
95 				if (is_multicast &&
96 				    inet6_mc_check(sk, loc_addr, rmt_addr))
97 					goto found;
98 				continue;
99 			}
100 			goto found;
101 		}
102 	sk = NULL;
103 found:
104 	return sk;
105 }
106 EXPORT_SYMBOL_GPL(__raw_v6_lookup);
107 
108 /*
109  *	0 - deliver
110  *	1 - block
111  */
112 static int icmpv6_filter(const struct sock *sk, const struct sk_buff *skb)
113 {
114 	struct icmp6hdr _hdr;
115 	const struct icmp6hdr *hdr;
116 
117 	/* We require only the four bytes of the ICMPv6 header, not any
118 	 * additional bytes of message body in "struct icmp6hdr".
119 	 */
120 	hdr = skb_header_pointer(skb, skb_transport_offset(skb),
121 				 ICMPV6_HDRLEN, &_hdr);
122 	if (hdr) {
123 		const __u32 *data = &raw6_sk(sk)->filter.data[0];
124 		unsigned int type = hdr->icmp6_type;
125 
126 		return (data[type >> 5] & (1U << (type & 31))) != 0;
127 	}
128 	return 1;
129 }
130 
131 #if IS_ENABLED(CONFIG_IPV6_MIP6)
132 typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb);
133 
134 static mh_filter_t __rcu *mh_filter __read_mostly;
135 
136 int rawv6_mh_filter_register(mh_filter_t filter)
137 {
138 	rcu_assign_pointer(mh_filter, filter);
139 	return 0;
140 }
141 EXPORT_SYMBOL(rawv6_mh_filter_register);
142 
143 int rawv6_mh_filter_unregister(mh_filter_t filter)
144 {
145 	RCU_INIT_POINTER(mh_filter, NULL);
146 	synchronize_rcu();
147 	return 0;
148 }
149 EXPORT_SYMBOL(rawv6_mh_filter_unregister);
150 
151 #endif
152 
153 /*
154  *	demultiplex raw sockets.
155  *	(should consider queueing the skb in the sock receive_queue
156  *	without calling rawv6.c)
157  *
158  *	Caller owns SKB so we must make clones.
159  */
160 static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
161 {
162 	const struct in6_addr *saddr;
163 	const struct in6_addr *daddr;
164 	struct sock *sk;
165 	bool delivered = false;
166 	__u8 hash;
167 	struct net *net;
168 
169 	saddr = &ipv6_hdr(skb)->saddr;
170 	daddr = saddr + 1;
171 
172 	hash = nexthdr & (RAW_HTABLE_SIZE - 1);
173 
174 	read_lock(&raw_v6_hashinfo.lock);
175 	sk = sk_head(&raw_v6_hashinfo.ht[hash]);
176 
177 	if (!sk)
178 		goto out;
179 
180 	net = dev_net(skb->dev);
181 	sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, inet6_iif(skb));
182 
183 	while (sk) {
184 		int filtered;
185 
186 		delivered = true;
187 		switch (nexthdr) {
188 		case IPPROTO_ICMPV6:
189 			filtered = icmpv6_filter(sk, skb);
190 			break;
191 
192 #if IS_ENABLED(CONFIG_IPV6_MIP6)
193 		case IPPROTO_MH:
194 		{
195 			/* XXX: To validate MH only once for each packet,
196 			 * this is placed here. It should be after checking
197 			 * xfrm policy, however it doesn't. The checking xfrm
198 			 * policy is placed in rawv6_rcv() because it is
199 			 * required for each socket.
200 			 */
201 			mh_filter_t *filter;
202 
203 			filter = rcu_dereference(mh_filter);
204 			filtered = filter ? (*filter)(sk, skb) : 0;
205 			break;
206 		}
207 #endif
208 		default:
209 			filtered = 0;
210 			break;
211 		}
212 
213 		if (filtered < 0)
214 			break;
215 		if (filtered == 0) {
216 			struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
217 
218 			/* Not releasing hash table! */
219 			if (clone) {
220 				nf_reset(clone);
221 				rawv6_rcv(sk, clone);
222 			}
223 		}
224 		sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
225 				     inet6_iif(skb));
226 	}
227 out:
228 	read_unlock(&raw_v6_hashinfo.lock);
229 	return delivered;
230 }
231 
232 bool raw6_local_deliver(struct sk_buff *skb, int nexthdr)
233 {
234 	struct sock *raw_sk;
235 
236 	raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (RAW_HTABLE_SIZE - 1)]);
237 	if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
238 		raw_sk = NULL;
239 
240 	return raw_sk != NULL;
241 }
242 
243 /* This cleans up af_inet6 a bit. -DaveM */
244 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
245 {
246 	struct inet_sock *inet = inet_sk(sk);
247 	struct ipv6_pinfo *np = inet6_sk(sk);
248 	struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
249 	__be32 v4addr = 0;
250 	int addr_type;
251 	int err;
252 
253 	if (addr_len < SIN6_LEN_RFC2133)
254 		return -EINVAL;
255 
256 	if (addr->sin6_family != AF_INET6)
257 		return -EINVAL;
258 
259 	addr_type = ipv6_addr_type(&addr->sin6_addr);
260 
261 	/* Raw sockets are IPv6 only */
262 	if (addr_type == IPV6_ADDR_MAPPED)
263 		return -EADDRNOTAVAIL;
264 
265 	lock_sock(sk);
266 
267 	err = -EINVAL;
268 	if (sk->sk_state != TCP_CLOSE)
269 		goto out;
270 
271 	rcu_read_lock();
272 	/* Check if the address belongs to the host. */
273 	if (addr_type != IPV6_ADDR_ANY) {
274 		struct net_device *dev = NULL;
275 
276 		if (__ipv6_addr_needs_scope_id(addr_type)) {
277 			if (addr_len >= sizeof(struct sockaddr_in6) &&
278 			    addr->sin6_scope_id) {
279 				/* Override any existing binding, if another
280 				 * one is supplied by user.
281 				 */
282 				sk->sk_bound_dev_if = addr->sin6_scope_id;
283 			}
284 
285 			/* Binding to link-local address requires an interface */
286 			if (!sk->sk_bound_dev_if)
287 				goto out_unlock;
288 
289 			err = -ENODEV;
290 			dev = dev_get_by_index_rcu(sock_net(sk),
291 						   sk->sk_bound_dev_if);
292 			if (!dev)
293 				goto out_unlock;
294 		}
295 
296 		/* ipv4 addr of the socket is invalid.  Only the
297 		 * unspecified and mapped address have a v4 equivalent.
298 		 */
299 		v4addr = LOOPBACK4_IPV6;
300 		if (!(addr_type & IPV6_ADDR_MULTICAST) &&
301 		    !sock_net(sk)->ipv6.sysctl.ip_nonlocal_bind) {
302 			err = -EADDRNOTAVAIL;
303 			if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
304 					   dev, 0)) {
305 				goto out_unlock;
306 			}
307 		}
308 	}
309 
310 	inet->inet_rcv_saddr = inet->inet_saddr = v4addr;
311 	sk->sk_v6_rcv_saddr = addr->sin6_addr;
312 	if (!(addr_type & IPV6_ADDR_MULTICAST))
313 		np->saddr = addr->sin6_addr;
314 	err = 0;
315 out_unlock:
316 	rcu_read_unlock();
317 out:
318 	release_sock(sk);
319 	return err;
320 }
321 
322 static void rawv6_err(struct sock *sk, struct sk_buff *skb,
323 	       struct inet6_skb_parm *opt,
324 	       u8 type, u8 code, int offset, __be32 info)
325 {
326 	struct inet_sock *inet = inet_sk(sk);
327 	struct ipv6_pinfo *np = inet6_sk(sk);
328 	int err;
329 	int harderr;
330 
331 	/* Report error on raw socket, if:
332 	   1. User requested recverr.
333 	   2. Socket is connected (otherwise the error indication
334 	      is useless without recverr and error is hard.
335 	 */
336 	if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
337 		return;
338 
339 	harderr = icmpv6_err_convert(type, code, &err);
340 	if (type == ICMPV6_PKT_TOOBIG) {
341 		ip6_sk_update_pmtu(skb, sk, info);
342 		harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
343 	}
344 	if (type == NDISC_REDIRECT) {
345 		ip6_sk_redirect(skb, sk);
346 		return;
347 	}
348 	if (np->recverr) {
349 		u8 *payload = skb->data;
350 		if (!inet->hdrincl)
351 			payload += offset;
352 		ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
353 	}
354 
355 	if (np->recverr || harderr) {
356 		sk->sk_err = err;
357 		sk->sk_error_report(sk);
358 	}
359 }
360 
361 void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
362 		u8 type, u8 code, int inner_offset, __be32 info)
363 {
364 	struct sock *sk;
365 	int hash;
366 	const struct in6_addr *saddr, *daddr;
367 	struct net *net;
368 
369 	hash = nexthdr & (RAW_HTABLE_SIZE - 1);
370 
371 	read_lock(&raw_v6_hashinfo.lock);
372 	sk = sk_head(&raw_v6_hashinfo.ht[hash]);
373 	if (sk) {
374 		/* Note: ipv6_hdr(skb) != skb->data */
375 		const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data;
376 		saddr = &ip6h->saddr;
377 		daddr = &ip6h->daddr;
378 		net = dev_net(skb->dev);
379 
380 		while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
381 						inet6_iif(skb)))) {
382 			rawv6_err(sk, skb, NULL, type, code,
383 					inner_offset, info);
384 			sk = sk_next(sk);
385 		}
386 	}
387 	read_unlock(&raw_v6_hashinfo.lock);
388 }
389 
390 static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb)
391 {
392 	if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) &&
393 	    skb_checksum_complete(skb)) {
394 		atomic_inc(&sk->sk_drops);
395 		kfree_skb(skb);
396 		return NET_RX_DROP;
397 	}
398 
399 	/* Charge it to the socket. */
400 	skb_dst_drop(skb);
401 	if (sock_queue_rcv_skb(sk, skb) < 0) {
402 		kfree_skb(skb);
403 		return NET_RX_DROP;
404 	}
405 
406 	return 0;
407 }
408 
409 /*
410  *	This is next to useless...
411  *	if we demultiplex in network layer we don't need the extra call
412  *	just to queue the skb...
413  *	maybe we could have the network decide upon a hint if it
414  *	should call raw_rcv for demultiplexing
415  */
416 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
417 {
418 	struct inet_sock *inet = inet_sk(sk);
419 	struct raw6_sock *rp = raw6_sk(sk);
420 
421 	if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
422 		atomic_inc(&sk->sk_drops);
423 		kfree_skb(skb);
424 		return NET_RX_DROP;
425 	}
426 
427 	if (!rp->checksum)
428 		skb->ip_summed = CHECKSUM_UNNECESSARY;
429 
430 	if (skb->ip_summed == CHECKSUM_COMPLETE) {
431 		skb_postpull_rcsum(skb, skb_network_header(skb),
432 				   skb_network_header_len(skb));
433 		if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
434 				     &ipv6_hdr(skb)->daddr,
435 				     skb->len, inet->inet_num, skb->csum))
436 			skb->ip_summed = CHECKSUM_UNNECESSARY;
437 	}
438 	if (!skb_csum_unnecessary(skb))
439 		skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
440 							 &ipv6_hdr(skb)->daddr,
441 							 skb->len,
442 							 inet->inet_num, 0));
443 
444 	if (inet->hdrincl) {
445 		if (skb_checksum_complete(skb)) {
446 			atomic_inc(&sk->sk_drops);
447 			kfree_skb(skb);
448 			return NET_RX_DROP;
449 		}
450 	}
451 
452 	rawv6_rcv_skb(sk, skb);
453 	return 0;
454 }
455 
456 
457 /*
458  *	This should be easy, if there is something there
459  *	we return it, otherwise we block.
460  */
461 
462 static int rawv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
463 			 int noblock, int flags, int *addr_len)
464 {
465 	struct ipv6_pinfo *np = inet6_sk(sk);
466 	DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
467 	struct sk_buff *skb;
468 	size_t copied;
469 	int err;
470 
471 	if (flags & MSG_OOB)
472 		return -EOPNOTSUPP;
473 
474 	if (flags & MSG_ERRQUEUE)
475 		return ipv6_recv_error(sk, msg, len, addr_len);
476 
477 	if (np->rxpmtu && np->rxopt.bits.rxpmtu)
478 		return ipv6_recv_rxpmtu(sk, msg, len, addr_len);
479 
480 	skb = skb_recv_datagram(sk, flags, noblock, &err);
481 	if (!skb)
482 		goto out;
483 
484 	copied = skb->len;
485 	if (copied > len) {
486 		copied = len;
487 		msg->msg_flags |= MSG_TRUNC;
488 	}
489 
490 	if (skb_csum_unnecessary(skb)) {
491 		err = skb_copy_datagram_msg(skb, 0, msg, copied);
492 	} else if (msg->msg_flags&MSG_TRUNC) {
493 		if (__skb_checksum_complete(skb))
494 			goto csum_copy_err;
495 		err = skb_copy_datagram_msg(skb, 0, msg, copied);
496 	} else {
497 		err = skb_copy_and_csum_datagram_msg(skb, 0, msg);
498 		if (err == -EINVAL)
499 			goto csum_copy_err;
500 	}
501 	if (err)
502 		goto out_free;
503 
504 	/* Copy the address. */
505 	if (sin6) {
506 		sin6->sin6_family = AF_INET6;
507 		sin6->sin6_port = 0;
508 		sin6->sin6_addr = ipv6_hdr(skb)->saddr;
509 		sin6->sin6_flowinfo = 0;
510 		sin6->sin6_scope_id = ipv6_iface_scope_id(&sin6->sin6_addr,
511 							  inet6_iif(skb));
512 		*addr_len = sizeof(*sin6);
513 	}
514 
515 	sock_recv_ts_and_drops(msg, sk, skb);
516 
517 	if (np->rxopt.all)
518 		ip6_datagram_recv_ctl(sk, msg, skb);
519 
520 	err = copied;
521 	if (flags & MSG_TRUNC)
522 		err = skb->len;
523 
524 out_free:
525 	skb_free_datagram(sk, skb);
526 out:
527 	return err;
528 
529 csum_copy_err:
530 	skb_kill_datagram(sk, skb, flags);
531 
532 	/* Error for blocking case is chosen to masquerade
533 	   as some normal condition.
534 	 */
535 	err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
536 	goto out;
537 }
538 
539 static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
540 				     struct raw6_sock *rp)
541 {
542 	struct sk_buff *skb;
543 	int err = 0;
544 	int offset;
545 	int len;
546 	int total_len;
547 	__wsum tmp_csum;
548 	__sum16 csum;
549 
550 	if (!rp->checksum)
551 		goto send;
552 
553 	skb = skb_peek(&sk->sk_write_queue);
554 	if (!skb)
555 		goto out;
556 
557 	offset = rp->offset;
558 	total_len = inet_sk(sk)->cork.base.length;
559 	if (offset >= total_len - 1) {
560 		err = -EINVAL;
561 		ip6_flush_pending_frames(sk);
562 		goto out;
563 	}
564 
565 	/* should be check HW csum miyazawa */
566 	if (skb_queue_len(&sk->sk_write_queue) == 1) {
567 		/*
568 		 * Only one fragment on the socket.
569 		 */
570 		tmp_csum = skb->csum;
571 	} else {
572 		struct sk_buff *csum_skb = NULL;
573 		tmp_csum = 0;
574 
575 		skb_queue_walk(&sk->sk_write_queue, skb) {
576 			tmp_csum = csum_add(tmp_csum, skb->csum);
577 
578 			if (csum_skb)
579 				continue;
580 
581 			len = skb->len - skb_transport_offset(skb);
582 			if (offset >= len) {
583 				offset -= len;
584 				continue;
585 			}
586 
587 			csum_skb = skb;
588 		}
589 
590 		skb = csum_skb;
591 	}
592 
593 	offset += skb_transport_offset(skb);
594 	err = skb_copy_bits(skb, offset, &csum, 2);
595 	if (err < 0) {
596 		ip6_flush_pending_frames(sk);
597 		goto out;
598 	}
599 
600 	/* in case cksum was not initialized */
601 	if (unlikely(csum))
602 		tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
603 
604 	csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr,
605 			       total_len, fl6->flowi6_proto, tmp_csum);
606 
607 	if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP)
608 		csum = CSUM_MANGLED_0;
609 
610 	BUG_ON(skb_store_bits(skb, offset, &csum, 2));
611 
612 send:
613 	err = ip6_push_pending_frames(sk);
614 out:
615 	return err;
616 }
617 
618 static int rawv6_send_hdrinc(struct sock *sk, struct msghdr *msg, int length,
619 			struct flowi6 *fl6, struct dst_entry **dstp,
620 			unsigned int flags)
621 {
622 	struct ipv6_pinfo *np = inet6_sk(sk);
623 	struct net *net = sock_net(sk);
624 	struct ipv6hdr *iph;
625 	struct sk_buff *skb;
626 	int err;
627 	struct rt6_info *rt = (struct rt6_info *)*dstp;
628 	int hlen = LL_RESERVED_SPACE(rt->dst.dev);
629 	int tlen = rt->dst.dev->needed_tailroom;
630 
631 	if (length > rt->dst.dev->mtu) {
632 		ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu);
633 		return -EMSGSIZE;
634 	}
635 	if (flags&MSG_PROBE)
636 		goto out;
637 
638 	skb = sock_alloc_send_skb(sk,
639 				  length + hlen + tlen + 15,
640 				  flags & MSG_DONTWAIT, &err);
641 	if (!skb)
642 		goto error;
643 	skb_reserve(skb, hlen);
644 
645 	skb->protocol = htons(ETH_P_IPV6);
646 	skb->priority = sk->sk_priority;
647 	skb->mark = sk->sk_mark;
648 	skb_dst_set(skb, &rt->dst);
649 	*dstp = NULL;
650 
651 	skb_put(skb, length);
652 	skb_reset_network_header(skb);
653 	iph = ipv6_hdr(skb);
654 
655 	skb->ip_summed = CHECKSUM_NONE;
656 
657 	if (flags & MSG_CONFIRM)
658 		skb_set_dst_pending_confirm(skb, 1);
659 
660 	skb->transport_header = skb->network_header;
661 	err = memcpy_from_msg(iph, msg, length);
662 	if (err)
663 		goto error_fault;
664 
665 	/* if egress device is enslaved to an L3 master device pass the
666 	 * skb to its handler for processing
667 	 */
668 	skb = l3mdev_ip6_out(sk, skb);
669 	if (unlikely(!skb))
670 		return 0;
671 
672 	IP6_UPD_PO_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
673 	err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, net, sk, skb,
674 		      NULL, rt->dst.dev, dst_output);
675 	if (err > 0)
676 		err = net_xmit_errno(err);
677 	if (err)
678 		goto error;
679 out:
680 	return 0;
681 
682 error_fault:
683 	err = -EFAULT;
684 	kfree_skb(skb);
685 error:
686 	IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
687 	if (err == -ENOBUFS && !np->recverr)
688 		err = 0;
689 	return err;
690 }
691 
692 struct raw6_frag_vec {
693 	struct msghdr *msg;
694 	int hlen;
695 	char c[4];
696 };
697 
698 static int rawv6_probe_proto_opt(struct raw6_frag_vec *rfv, struct flowi6 *fl6)
699 {
700 	int err = 0;
701 	switch (fl6->flowi6_proto) {
702 	case IPPROTO_ICMPV6:
703 		rfv->hlen = 2;
704 		err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen);
705 		if (!err) {
706 			fl6->fl6_icmp_type = rfv->c[0];
707 			fl6->fl6_icmp_code = rfv->c[1];
708 		}
709 		break;
710 	case IPPROTO_MH:
711 		rfv->hlen = 4;
712 		err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen);
713 		if (!err)
714 			fl6->fl6_mh_type = rfv->c[2];
715 	}
716 	return err;
717 }
718 
719 static int raw6_getfrag(void *from, char *to, int offset, int len, int odd,
720 		       struct sk_buff *skb)
721 {
722 	struct raw6_frag_vec *rfv = from;
723 
724 	if (offset < rfv->hlen) {
725 		int copy = min(rfv->hlen - offset, len);
726 
727 		if (skb->ip_summed == CHECKSUM_PARTIAL)
728 			memcpy(to, rfv->c + offset, copy);
729 		else
730 			skb->csum = csum_block_add(
731 				skb->csum,
732 				csum_partial_copy_nocheck(rfv->c + offset,
733 							  to, copy, 0),
734 				odd);
735 
736 		odd = 0;
737 		offset += copy;
738 		to += copy;
739 		len -= copy;
740 
741 		if (!len)
742 			return 0;
743 	}
744 
745 	offset -= rfv->hlen;
746 
747 	return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb);
748 }
749 
750 static int rawv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
751 {
752 	struct ipv6_txoptions *opt_to_free = NULL;
753 	struct ipv6_txoptions opt_space;
754 	DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
755 	struct in6_addr *daddr, *final_p, final;
756 	struct inet_sock *inet = inet_sk(sk);
757 	struct ipv6_pinfo *np = inet6_sk(sk);
758 	struct raw6_sock *rp = raw6_sk(sk);
759 	struct ipv6_txoptions *opt = NULL;
760 	struct ip6_flowlabel *flowlabel = NULL;
761 	struct dst_entry *dst = NULL;
762 	struct raw6_frag_vec rfv;
763 	struct flowi6 fl6;
764 	struct sockcm_cookie sockc;
765 	struct ipcm6_cookie ipc6;
766 	int addr_len = msg->msg_namelen;
767 	u16 proto;
768 	int err;
769 
770 	/* Rough check on arithmetic overflow,
771 	   better check is made in ip6_append_data().
772 	 */
773 	if (len > INT_MAX)
774 		return -EMSGSIZE;
775 
776 	/* Mirror BSD error message compatibility */
777 	if (msg->msg_flags & MSG_OOB)
778 		return -EOPNOTSUPP;
779 
780 	/*
781 	 *	Get and verify the address.
782 	 */
783 	memset(&fl6, 0, sizeof(fl6));
784 
785 	fl6.flowi6_mark = sk->sk_mark;
786 	fl6.flowi6_uid = sk->sk_uid;
787 
788 	ipc6.hlimit = -1;
789 	ipc6.tclass = -1;
790 	ipc6.dontfrag = -1;
791 	ipc6.opt = NULL;
792 
793 	if (sin6) {
794 		if (addr_len < SIN6_LEN_RFC2133)
795 			return -EINVAL;
796 
797 		if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
798 			return -EAFNOSUPPORT;
799 
800 		/* port is the proto value [0..255] carried in nexthdr */
801 		proto = ntohs(sin6->sin6_port);
802 
803 		if (!proto)
804 			proto = inet->inet_num;
805 		else if (proto != inet->inet_num)
806 			return -EINVAL;
807 
808 		if (proto > 255)
809 			return -EINVAL;
810 
811 		daddr = &sin6->sin6_addr;
812 		if (np->sndflow) {
813 			fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
814 			if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
815 				flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
816 				if (!flowlabel)
817 					return -EINVAL;
818 			}
819 		}
820 
821 		/*
822 		 * Otherwise it will be difficult to maintain
823 		 * sk->sk_dst_cache.
824 		 */
825 		if (sk->sk_state == TCP_ESTABLISHED &&
826 		    ipv6_addr_equal(daddr, &sk->sk_v6_daddr))
827 			daddr = &sk->sk_v6_daddr;
828 
829 		if (addr_len >= sizeof(struct sockaddr_in6) &&
830 		    sin6->sin6_scope_id &&
831 		    __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr)))
832 			fl6.flowi6_oif = sin6->sin6_scope_id;
833 	} else {
834 		if (sk->sk_state != TCP_ESTABLISHED)
835 			return -EDESTADDRREQ;
836 
837 		proto = inet->inet_num;
838 		daddr = &sk->sk_v6_daddr;
839 		fl6.flowlabel = np->flow_label;
840 	}
841 
842 	if (fl6.flowi6_oif == 0)
843 		fl6.flowi6_oif = sk->sk_bound_dev_if;
844 
845 	sockc.tsflags = sk->sk_tsflags;
846 	if (msg->msg_controllen) {
847 		opt = &opt_space;
848 		memset(opt, 0, sizeof(struct ipv6_txoptions));
849 		opt->tot_len = sizeof(struct ipv6_txoptions);
850 		ipc6.opt = opt;
851 
852 		err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, &ipc6, &sockc);
853 		if (err < 0) {
854 			fl6_sock_release(flowlabel);
855 			return err;
856 		}
857 		if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
858 			flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
859 			if (!flowlabel)
860 				return -EINVAL;
861 		}
862 		if (!(opt->opt_nflen|opt->opt_flen))
863 			opt = NULL;
864 	}
865 	if (!opt) {
866 		opt = txopt_get(np);
867 		opt_to_free = opt;
868 	}
869 	if (flowlabel)
870 		opt = fl6_merge_options(&opt_space, flowlabel, opt);
871 	opt = ipv6_fixup_options(&opt_space, opt);
872 
873 	fl6.flowi6_proto = proto;
874 	rfv.msg = msg;
875 	rfv.hlen = 0;
876 	err = rawv6_probe_proto_opt(&rfv, &fl6);
877 	if (err)
878 		goto out;
879 
880 	if (!ipv6_addr_any(daddr))
881 		fl6.daddr = *daddr;
882 	else
883 		fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
884 	if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
885 		fl6.saddr = np->saddr;
886 
887 	final_p = fl6_update_dst(&fl6, opt, &final);
888 
889 	if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
890 		fl6.flowi6_oif = np->mcast_oif;
891 	else if (!fl6.flowi6_oif)
892 		fl6.flowi6_oif = np->ucast_oif;
893 	security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
894 
895 	if (inet->hdrincl)
896 		fl6.flowi6_flags |= FLOWI_FLAG_KNOWN_NH;
897 
898 	if (ipc6.tclass < 0)
899 		ipc6.tclass = np->tclass;
900 
901 	fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel);
902 
903 	dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
904 	if (IS_ERR(dst)) {
905 		err = PTR_ERR(dst);
906 		goto out;
907 	}
908 	if (ipc6.hlimit < 0)
909 		ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
910 
911 	if (ipc6.dontfrag < 0)
912 		ipc6.dontfrag = np->dontfrag;
913 
914 	if (msg->msg_flags&MSG_CONFIRM)
915 		goto do_confirm;
916 
917 back_from_confirm:
918 	if (inet->hdrincl)
919 		err = rawv6_send_hdrinc(sk, msg, len, &fl6, &dst, msg->msg_flags);
920 	else {
921 		ipc6.opt = opt;
922 		lock_sock(sk);
923 		err = ip6_append_data(sk, raw6_getfrag, &rfv,
924 			len, 0, &ipc6, &fl6, (struct rt6_info *)dst,
925 			msg->msg_flags, &sockc);
926 
927 		if (err)
928 			ip6_flush_pending_frames(sk);
929 		else if (!(msg->msg_flags & MSG_MORE))
930 			err = rawv6_push_pending_frames(sk, &fl6, rp);
931 		release_sock(sk);
932 	}
933 done:
934 	dst_release(dst);
935 out:
936 	fl6_sock_release(flowlabel);
937 	txopt_put(opt_to_free);
938 	return err < 0 ? err : len;
939 do_confirm:
940 	if (msg->msg_flags & MSG_PROBE)
941 		dst_confirm_neigh(dst, &fl6.daddr);
942 	if (!(msg->msg_flags & MSG_PROBE) || len)
943 		goto back_from_confirm;
944 	err = 0;
945 	goto done;
946 }
947 
948 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
949 			       char __user *optval, int optlen)
950 {
951 	switch (optname) {
952 	case ICMPV6_FILTER:
953 		if (optlen > sizeof(struct icmp6_filter))
954 			optlen = sizeof(struct icmp6_filter);
955 		if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
956 			return -EFAULT;
957 		return 0;
958 	default:
959 		return -ENOPROTOOPT;
960 	}
961 
962 	return 0;
963 }
964 
965 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
966 			       char __user *optval, int __user *optlen)
967 {
968 	int len;
969 
970 	switch (optname) {
971 	case ICMPV6_FILTER:
972 		if (get_user(len, optlen))
973 			return -EFAULT;
974 		if (len < 0)
975 			return -EINVAL;
976 		if (len > sizeof(struct icmp6_filter))
977 			len = sizeof(struct icmp6_filter);
978 		if (put_user(len, optlen))
979 			return -EFAULT;
980 		if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
981 			return -EFAULT;
982 		return 0;
983 	default:
984 		return -ENOPROTOOPT;
985 	}
986 
987 	return 0;
988 }
989 
990 
991 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
992 			    char __user *optval, unsigned int optlen)
993 {
994 	struct raw6_sock *rp = raw6_sk(sk);
995 	int val;
996 
997 	if (get_user(val, (int __user *)optval))
998 		return -EFAULT;
999 
1000 	switch (optname) {
1001 	case IPV6_HDRINCL:
1002 		if (sk->sk_type != SOCK_RAW)
1003 			return -EINVAL;
1004 		inet_sk(sk)->hdrincl = !!val;
1005 		return 0;
1006 	case IPV6_CHECKSUM:
1007 		if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
1008 		    level == IPPROTO_IPV6) {
1009 			/*
1010 			 * RFC3542 tells that IPV6_CHECKSUM socket
1011 			 * option in the IPPROTO_IPV6 level is not
1012 			 * allowed on ICMPv6 sockets.
1013 			 * If you want to set it, use IPPROTO_RAW
1014 			 * level IPV6_CHECKSUM socket option
1015 			 * (Linux extension).
1016 			 */
1017 			return -EINVAL;
1018 		}
1019 
1020 		/* You may get strange result with a positive odd offset;
1021 		   RFC2292bis agrees with me. */
1022 		if (val > 0 && (val&1))
1023 			return -EINVAL;
1024 		if (val < 0) {
1025 			rp->checksum = 0;
1026 		} else {
1027 			rp->checksum = 1;
1028 			rp->offset = val;
1029 		}
1030 
1031 		return 0;
1032 
1033 	default:
1034 		return -ENOPROTOOPT;
1035 	}
1036 }
1037 
1038 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1039 			  char __user *optval, unsigned int optlen)
1040 {
1041 	switch (level) {
1042 	case SOL_RAW:
1043 		break;
1044 
1045 	case SOL_ICMPV6:
1046 		if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1047 			return -EOPNOTSUPP;
1048 		return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1049 	case SOL_IPV6:
1050 		if (optname == IPV6_CHECKSUM ||
1051 		    optname == IPV6_HDRINCL)
1052 			break;
1053 	default:
1054 		return ipv6_setsockopt(sk, level, optname, optval, optlen);
1055 	}
1056 
1057 	return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1058 }
1059 
1060 #ifdef CONFIG_COMPAT
1061 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1062 				   char __user *optval, unsigned int optlen)
1063 {
1064 	switch (level) {
1065 	case SOL_RAW:
1066 		break;
1067 	case SOL_ICMPV6:
1068 		if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1069 			return -EOPNOTSUPP;
1070 		return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1071 	case SOL_IPV6:
1072 		if (optname == IPV6_CHECKSUM ||
1073 		    optname == IPV6_HDRINCL)
1074 			break;
1075 	default:
1076 		return compat_ipv6_setsockopt(sk, level, optname,
1077 					      optval, optlen);
1078 	}
1079 	return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1080 }
1081 #endif
1082 
1083 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1084 			    char __user *optval, int __user *optlen)
1085 {
1086 	struct raw6_sock *rp = raw6_sk(sk);
1087 	int val, len;
1088 
1089 	if (get_user(len, optlen))
1090 		return -EFAULT;
1091 
1092 	switch (optname) {
1093 	case IPV6_HDRINCL:
1094 		val = inet_sk(sk)->hdrincl;
1095 		break;
1096 	case IPV6_CHECKSUM:
1097 		/*
1098 		 * We allow getsockopt() for IPPROTO_IPV6-level
1099 		 * IPV6_CHECKSUM socket option on ICMPv6 sockets
1100 		 * since RFC3542 is silent about it.
1101 		 */
1102 		if (rp->checksum == 0)
1103 			val = -1;
1104 		else
1105 			val = rp->offset;
1106 		break;
1107 
1108 	default:
1109 		return -ENOPROTOOPT;
1110 	}
1111 
1112 	len = min_t(unsigned int, sizeof(int), len);
1113 
1114 	if (put_user(len, optlen))
1115 		return -EFAULT;
1116 	if (copy_to_user(optval, &val, len))
1117 		return -EFAULT;
1118 	return 0;
1119 }
1120 
1121 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1122 			  char __user *optval, int __user *optlen)
1123 {
1124 	switch (level) {
1125 	case SOL_RAW:
1126 		break;
1127 
1128 	case SOL_ICMPV6:
1129 		if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1130 			return -EOPNOTSUPP;
1131 		return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1132 	case SOL_IPV6:
1133 		if (optname == IPV6_CHECKSUM ||
1134 		    optname == IPV6_HDRINCL)
1135 			break;
1136 	default:
1137 		return ipv6_getsockopt(sk, level, optname, optval, optlen);
1138 	}
1139 
1140 	return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1141 }
1142 
1143 #ifdef CONFIG_COMPAT
1144 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1145 				   char __user *optval, int __user *optlen)
1146 {
1147 	switch (level) {
1148 	case SOL_RAW:
1149 		break;
1150 	case SOL_ICMPV6:
1151 		if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1152 			return -EOPNOTSUPP;
1153 		return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1154 	case SOL_IPV6:
1155 		if (optname == IPV6_CHECKSUM ||
1156 		    optname == IPV6_HDRINCL)
1157 			break;
1158 	default:
1159 		return compat_ipv6_getsockopt(sk, level, optname,
1160 					      optval, optlen);
1161 	}
1162 	return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1163 }
1164 #endif
1165 
1166 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1167 {
1168 	switch (cmd) {
1169 	case SIOCOUTQ: {
1170 		int amount = sk_wmem_alloc_get(sk);
1171 
1172 		return put_user(amount, (int __user *)arg);
1173 	}
1174 	case SIOCINQ: {
1175 		struct sk_buff *skb;
1176 		int amount = 0;
1177 
1178 		spin_lock_bh(&sk->sk_receive_queue.lock);
1179 		skb = skb_peek(&sk->sk_receive_queue);
1180 		if (skb)
1181 			amount = skb_tail_pointer(skb) -
1182 				skb_transport_header(skb);
1183 		spin_unlock_bh(&sk->sk_receive_queue.lock);
1184 		return put_user(amount, (int __user *)arg);
1185 	}
1186 
1187 	default:
1188 #ifdef CONFIG_IPV6_MROUTE
1189 		return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1190 #else
1191 		return -ENOIOCTLCMD;
1192 #endif
1193 	}
1194 }
1195 
1196 #ifdef CONFIG_COMPAT
1197 static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
1198 {
1199 	switch (cmd) {
1200 	case SIOCOUTQ:
1201 	case SIOCINQ:
1202 		return -ENOIOCTLCMD;
1203 	default:
1204 #ifdef CONFIG_IPV6_MROUTE
1205 		return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
1206 #else
1207 		return -ENOIOCTLCMD;
1208 #endif
1209 	}
1210 }
1211 #endif
1212 
1213 static void rawv6_close(struct sock *sk, long timeout)
1214 {
1215 	if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1216 		ip6_ra_control(sk, -1);
1217 	ip6mr_sk_done(sk);
1218 	sk_common_release(sk);
1219 }
1220 
1221 static void raw6_destroy(struct sock *sk)
1222 {
1223 	lock_sock(sk);
1224 	ip6_flush_pending_frames(sk);
1225 	release_sock(sk);
1226 
1227 	inet6_destroy_sock(sk);
1228 }
1229 
1230 static int rawv6_init_sk(struct sock *sk)
1231 {
1232 	struct raw6_sock *rp = raw6_sk(sk);
1233 
1234 	switch (inet_sk(sk)->inet_num) {
1235 	case IPPROTO_ICMPV6:
1236 		rp->checksum = 1;
1237 		rp->offset   = 2;
1238 		break;
1239 	case IPPROTO_MH:
1240 		rp->checksum = 1;
1241 		rp->offset   = 4;
1242 		break;
1243 	default:
1244 		break;
1245 	}
1246 	return 0;
1247 }
1248 
1249 struct proto rawv6_prot = {
1250 	.name		   = "RAWv6",
1251 	.owner		   = THIS_MODULE,
1252 	.close		   = rawv6_close,
1253 	.destroy	   = raw6_destroy,
1254 	.connect	   = ip6_datagram_connect_v6_only,
1255 	.disconnect	   = __udp_disconnect,
1256 	.ioctl		   = rawv6_ioctl,
1257 	.init		   = rawv6_init_sk,
1258 	.setsockopt	   = rawv6_setsockopt,
1259 	.getsockopt	   = rawv6_getsockopt,
1260 	.sendmsg	   = rawv6_sendmsg,
1261 	.recvmsg	   = rawv6_recvmsg,
1262 	.bind		   = rawv6_bind,
1263 	.backlog_rcv	   = rawv6_rcv_skb,
1264 	.hash		   = raw_hash_sk,
1265 	.unhash		   = raw_unhash_sk,
1266 	.obj_size	   = sizeof(struct raw6_sock),
1267 	.h.raw_hash	   = &raw_v6_hashinfo,
1268 #ifdef CONFIG_COMPAT
1269 	.compat_setsockopt = compat_rawv6_setsockopt,
1270 	.compat_getsockopt = compat_rawv6_getsockopt,
1271 	.compat_ioctl	   = compat_rawv6_ioctl,
1272 #endif
1273 	.diag_destroy	   = raw_abort,
1274 };
1275 
1276 #ifdef CONFIG_PROC_FS
1277 static int raw6_seq_show(struct seq_file *seq, void *v)
1278 {
1279 	if (v == SEQ_START_TOKEN) {
1280 		seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
1281 	} else {
1282 		struct sock *sp = v;
1283 		__u16 srcp  = inet_sk(sp)->inet_num;
1284 		ip6_dgram_sock_seq_show(seq, v, srcp, 0,
1285 					raw_seq_private(seq)->bucket);
1286 	}
1287 	return 0;
1288 }
1289 
1290 static const struct seq_operations raw6_seq_ops = {
1291 	.start =	raw_seq_start,
1292 	.next =		raw_seq_next,
1293 	.stop =		raw_seq_stop,
1294 	.show =		raw6_seq_show,
1295 };
1296 
1297 static int raw6_seq_open(struct inode *inode, struct file *file)
1298 {
1299 	return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1300 }
1301 
1302 static const struct file_operations raw6_seq_fops = {
1303 	.owner =	THIS_MODULE,
1304 	.open =		raw6_seq_open,
1305 	.read =		seq_read,
1306 	.llseek =	seq_lseek,
1307 	.release =	seq_release_net,
1308 };
1309 
1310 static int __net_init raw6_init_net(struct net *net)
1311 {
1312 	if (!proc_create("raw6", S_IRUGO, net->proc_net, &raw6_seq_fops))
1313 		return -ENOMEM;
1314 
1315 	return 0;
1316 }
1317 
1318 static void __net_exit raw6_exit_net(struct net *net)
1319 {
1320 	remove_proc_entry("raw6", net->proc_net);
1321 }
1322 
1323 static struct pernet_operations raw6_net_ops = {
1324 	.init = raw6_init_net,
1325 	.exit = raw6_exit_net,
1326 };
1327 
1328 int __init raw6_proc_init(void)
1329 {
1330 	return register_pernet_subsys(&raw6_net_ops);
1331 }
1332 
1333 void raw6_proc_exit(void)
1334 {
1335 	unregister_pernet_subsys(&raw6_net_ops);
1336 }
1337 #endif	/* CONFIG_PROC_FS */
1338 
1339 /* Same as inet6_dgram_ops, sans udp_poll.  */
1340 static const struct proto_ops inet6_sockraw_ops = {
1341 	.family		   = PF_INET6,
1342 	.owner		   = THIS_MODULE,
1343 	.release	   = inet6_release,
1344 	.bind		   = inet6_bind,
1345 	.connect	   = inet_dgram_connect,	/* ok		*/
1346 	.socketpair	   = sock_no_socketpair,	/* a do nothing	*/
1347 	.accept		   = sock_no_accept,		/* a do nothing	*/
1348 	.getname	   = inet6_getname,
1349 	.poll		   = datagram_poll,		/* ok		*/
1350 	.ioctl		   = inet6_ioctl,		/* must change  */
1351 	.listen		   = sock_no_listen,		/* ok		*/
1352 	.shutdown	   = inet_shutdown,		/* ok		*/
1353 	.setsockopt	   = sock_common_setsockopt,	/* ok		*/
1354 	.getsockopt	   = sock_common_getsockopt,	/* ok		*/
1355 	.sendmsg	   = inet_sendmsg,		/* ok		*/
1356 	.recvmsg	   = sock_common_recvmsg,	/* ok		*/
1357 	.mmap		   = sock_no_mmap,
1358 	.sendpage	   = sock_no_sendpage,
1359 #ifdef CONFIG_COMPAT
1360 	.compat_setsockopt = compat_sock_common_setsockopt,
1361 	.compat_getsockopt = compat_sock_common_getsockopt,
1362 #endif
1363 };
1364 
1365 static struct inet_protosw rawv6_protosw = {
1366 	.type		= SOCK_RAW,
1367 	.protocol	= IPPROTO_IP,	/* wild card */
1368 	.prot		= &rawv6_prot,
1369 	.ops		= &inet6_sockraw_ops,
1370 	.flags		= INET_PROTOSW_REUSE,
1371 };
1372 
1373 int __init rawv6_init(void)
1374 {
1375 	return inet6_register_protosw(&rawv6_protosw);
1376 }
1377 
1378 void rawv6_exit(void)
1379 {
1380 	inet6_unregister_protosw(&rawv6_protosw);
1381 }
1382