xref: /openbmc/linux/net/ipv6/raw.c (revision b18d2847)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *	RAW sockets for IPv6
4  *	Linux INET6 implementation
5  *
6  *	Authors:
7  *	Pedro Roque		<roque@di.fc.ul.pt>
8  *
9  *	Adapted from linux/net/ipv4/raw.c
10  *
11  *	Fixes:
12  *	Hideaki YOSHIFUJI	:	sin6_scope_id support
13  *	YOSHIFUJI,H.@USAGI	:	raw checksum (RFC2292(bis) compliance)
14  *	Kazunori MIYAZAWA @USAGI:	change process style to use ip6_append_data
15  */
16 
17 #include <linux/errno.h>
18 #include <linux/types.h>
19 #include <linux/socket.h>
20 #include <linux/slab.h>
21 #include <linux/sockios.h>
22 #include <linux/net.h>
23 #include <linux/in6.h>
24 #include <linux/netdevice.h>
25 #include <linux/if_arp.h>
26 #include <linux/icmpv6.h>
27 #include <linux/netfilter.h>
28 #include <linux/netfilter_ipv6.h>
29 #include <linux/skbuff.h>
30 #include <linux/compat.h>
31 #include <linux/uaccess.h>
32 #include <asm/ioctls.h>
33 
34 #include <net/net_namespace.h>
35 #include <net/ip.h>
36 #include <net/sock.h>
37 #include <net/snmp.h>
38 
39 #include <net/ipv6.h>
40 #include <net/ndisc.h>
41 #include <net/protocol.h>
42 #include <net/ip6_route.h>
43 #include <net/ip6_checksum.h>
44 #include <net/addrconf.h>
45 #include <net/transp_v6.h>
46 #include <net/udp.h>
47 #include <net/inet_common.h>
48 #include <net/tcp_states.h>
49 #if IS_ENABLED(CONFIG_IPV6_MIP6)
50 #include <net/mip6.h>
51 #endif
52 #include <linux/mroute6.h>
53 
54 #include <net/raw.h>
55 #include <net/rawv6.h>
56 #include <net/xfrm.h>
57 
58 #include <linux/proc_fs.h>
59 #include <linux/seq_file.h>
60 #include <linux/export.h>
61 
62 #define	ICMPV6_HDRLEN	4	/* ICMPv6 header, RFC 4443 Section 2.1 */
63 
64 struct raw_hashinfo raw_v6_hashinfo = {
65 	.lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
66 };
67 EXPORT_SYMBOL_GPL(raw_v6_hashinfo);
68 
69 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, int sdif)
72 {
73 	bool is_multicast = ipv6_addr_is_multicast(loc_addr);
74 
75 	sk_for_each_from(sk)
76 		if (inet_sk(sk)->inet_num == num) {
77 
78 			if (!net_eq(sock_net(sk), net))
79 				continue;
80 
81 			if (!ipv6_addr_any(&sk->sk_v6_daddr) &&
82 			    !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr))
83 				continue;
84 
85 			if (!raw_sk_bound_dev_eq(net, sk->sk_bound_dev_if,
86 						 dif, sdif))
87 				continue;
88 
89 			if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) {
90 				if (ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr))
91 					goto found;
92 				if (is_multicast &&
93 				    inet6_mc_check(sk, loc_addr, rmt_addr))
94 					goto found;
95 				continue;
96 			}
97 			goto found;
98 		}
99 	sk = NULL;
100 found:
101 	return sk;
102 }
103 EXPORT_SYMBOL_GPL(__raw_v6_lookup);
104 
105 /*
106  *	0 - deliver
107  *	1 - block
108  */
109 static int icmpv6_filter(const struct sock *sk, const struct sk_buff *skb)
110 {
111 	struct icmp6hdr _hdr;
112 	const struct icmp6hdr *hdr;
113 
114 	/* We require only the four bytes of the ICMPv6 header, not any
115 	 * additional bytes of message body in "struct icmp6hdr".
116 	 */
117 	hdr = skb_header_pointer(skb, skb_transport_offset(skb),
118 				 ICMPV6_HDRLEN, &_hdr);
119 	if (hdr) {
120 		const __u32 *data = &raw6_sk(sk)->filter.data[0];
121 		unsigned int type = hdr->icmp6_type;
122 
123 		return (data[type >> 5] & (1U << (type & 31))) != 0;
124 	}
125 	return 1;
126 }
127 
128 #if IS_ENABLED(CONFIG_IPV6_MIP6)
129 typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb);
130 
131 static mh_filter_t __rcu *mh_filter __read_mostly;
132 
133 int rawv6_mh_filter_register(mh_filter_t filter)
134 {
135 	rcu_assign_pointer(mh_filter, filter);
136 	return 0;
137 }
138 EXPORT_SYMBOL(rawv6_mh_filter_register);
139 
140 int rawv6_mh_filter_unregister(mh_filter_t filter)
141 {
142 	RCU_INIT_POINTER(mh_filter, NULL);
143 	synchronize_rcu();
144 	return 0;
145 }
146 EXPORT_SYMBOL(rawv6_mh_filter_unregister);
147 
148 #endif
149 
150 /*
151  *	demultiplex raw sockets.
152  *	(should consider queueing the skb in the sock receive_queue
153  *	without calling rawv6.c)
154  *
155  *	Caller owns SKB so we must make clones.
156  */
157 static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
158 {
159 	const struct in6_addr *saddr;
160 	const struct in6_addr *daddr;
161 	struct sock *sk;
162 	bool delivered = false;
163 	__u8 hash;
164 	struct net *net;
165 
166 	saddr = &ipv6_hdr(skb)->saddr;
167 	daddr = saddr + 1;
168 
169 	hash = nexthdr & (RAW_HTABLE_SIZE - 1);
170 
171 	read_lock(&raw_v6_hashinfo.lock);
172 	sk = sk_head(&raw_v6_hashinfo.ht[hash]);
173 
174 	if (!sk)
175 		goto out;
176 
177 	net = dev_net(skb->dev);
178 	sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr,
179 			     inet6_iif(skb), inet6_sdif(skb));
180 
181 	while (sk) {
182 		int filtered;
183 
184 		delivered = true;
185 		switch (nexthdr) {
186 		case IPPROTO_ICMPV6:
187 			filtered = icmpv6_filter(sk, skb);
188 			break;
189 
190 #if IS_ENABLED(CONFIG_IPV6_MIP6)
191 		case IPPROTO_MH:
192 		{
193 			/* XXX: To validate MH only once for each packet,
194 			 * this is placed here. It should be after checking
195 			 * xfrm policy, however it doesn't. The checking xfrm
196 			 * policy is placed in rawv6_rcv() because it is
197 			 * required for each socket.
198 			 */
199 			mh_filter_t *filter;
200 
201 			filter = rcu_dereference(mh_filter);
202 			filtered = filter ? (*filter)(sk, skb) : 0;
203 			break;
204 		}
205 #endif
206 		default:
207 			filtered = 0;
208 			break;
209 		}
210 
211 		if (filtered < 0)
212 			break;
213 		if (filtered == 0) {
214 			struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
215 
216 			/* Not releasing hash table! */
217 			if (clone) {
218 				nf_reset_ct(clone);
219 				rawv6_rcv(sk, clone);
220 			}
221 		}
222 		sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
223 				     inet6_iif(skb), inet6_sdif(skb));
224 	}
225 out:
226 	read_unlock(&raw_v6_hashinfo.lock);
227 	return delivered;
228 }
229 
230 bool raw6_local_deliver(struct sk_buff *skb, int nexthdr)
231 {
232 	struct sock *raw_sk;
233 
234 	raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (RAW_HTABLE_SIZE - 1)]);
235 	if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
236 		raw_sk = NULL;
237 
238 	return raw_sk != NULL;
239 }
240 
241 /* This cleans up af_inet6 a bit. -DaveM */
242 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
243 {
244 	struct inet_sock *inet = inet_sk(sk);
245 	struct ipv6_pinfo *np = inet6_sk(sk);
246 	struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
247 	__be32 v4addr = 0;
248 	int addr_type;
249 	int err;
250 
251 	if (addr_len < SIN6_LEN_RFC2133)
252 		return -EINVAL;
253 
254 	if (addr->sin6_family != AF_INET6)
255 		return -EINVAL;
256 
257 	addr_type = ipv6_addr_type(&addr->sin6_addr);
258 
259 	/* Raw sockets are IPv6 only */
260 	if (addr_type == IPV6_ADDR_MAPPED)
261 		return -EADDRNOTAVAIL;
262 
263 	lock_sock(sk);
264 
265 	err = -EINVAL;
266 	if (sk->sk_state != TCP_CLOSE)
267 		goto out;
268 
269 	rcu_read_lock();
270 	/* Check if the address belongs to the host. */
271 	if (addr_type != IPV6_ADDR_ANY) {
272 		struct net_device *dev = NULL;
273 
274 		if (__ipv6_addr_needs_scope_id(addr_type)) {
275 			if (addr_len >= sizeof(struct sockaddr_in6) &&
276 			    addr->sin6_scope_id) {
277 				/* Override any existing binding, if another
278 				 * one is supplied by user.
279 				 */
280 				sk->sk_bound_dev_if = addr->sin6_scope_id;
281 			}
282 
283 			/* Binding to link-local address requires an interface */
284 			if (!sk->sk_bound_dev_if)
285 				goto out_unlock;
286 		}
287 
288 		if (sk->sk_bound_dev_if) {
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 		    !ipv6_can_nonlocal_bind(sock_net(sk), inet)) {
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_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), 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, const struct sockcm_cookie *sockc)
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 (length < sizeof(struct ipv6hdr))
636 		return -EINVAL;
637 	if (flags&MSG_PROBE)
638 		goto out;
639 
640 	skb = sock_alloc_send_skb(sk,
641 				  length + hlen + tlen + 15,
642 				  flags & MSG_DONTWAIT, &err);
643 	if (!skb)
644 		goto error;
645 	skb_reserve(skb, hlen);
646 
647 	skb->protocol = htons(ETH_P_IPV6);
648 	skb->priority = sk->sk_priority;
649 	skb->mark = sockc->mark;
650 	skb->tstamp = sockc->transmit_time;
651 
652 	skb_put(skb, length);
653 	skb_reset_network_header(skb);
654 	iph = ipv6_hdr(skb);
655 
656 	skb->ip_summed = CHECKSUM_NONE;
657 
658 	skb_setup_tx_timestamp(skb, sockc->tsflags);
659 
660 	if (flags & MSG_CONFIRM)
661 		skb_set_dst_pending_confirm(skb, 1);
662 
663 	skb->transport_header = skb->network_header;
664 	err = memcpy_from_msg(iph, msg, length);
665 	if (err) {
666 		err = -EFAULT;
667 		kfree_skb(skb);
668 		goto error;
669 	}
670 
671 	skb_dst_set(skb, &rt->dst);
672 	*dstp = NULL;
673 
674 	/* if egress device is enslaved to an L3 master device pass the
675 	 * skb to its handler for processing
676 	 */
677 	skb = l3mdev_ip6_out(sk, skb);
678 	if (unlikely(!skb))
679 		return 0;
680 
681 	/* Acquire rcu_read_lock() in case we need to use rt->rt6i_idev
682 	 * in the error path. Since skb has been freed, the dst could
683 	 * have been queued for deletion.
684 	 */
685 	rcu_read_lock();
686 	IP6_UPD_PO_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
687 	err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, net, sk, skb,
688 		      NULL, rt->dst.dev, dst_output);
689 	if (err > 0)
690 		err = net_xmit_errno(err);
691 	if (err) {
692 		IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
693 		rcu_read_unlock();
694 		goto error_check;
695 	}
696 	rcu_read_unlock();
697 out:
698 	return 0;
699 
700 error:
701 	IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
702 error_check:
703 	if (err == -ENOBUFS && !np->recverr)
704 		err = 0;
705 	return err;
706 }
707 
708 struct raw6_frag_vec {
709 	struct msghdr *msg;
710 	int hlen;
711 	char c[4];
712 };
713 
714 static int rawv6_probe_proto_opt(struct raw6_frag_vec *rfv, struct flowi6 *fl6)
715 {
716 	int err = 0;
717 	switch (fl6->flowi6_proto) {
718 	case IPPROTO_ICMPV6:
719 		rfv->hlen = 2;
720 		err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen);
721 		if (!err) {
722 			fl6->fl6_icmp_type = rfv->c[0];
723 			fl6->fl6_icmp_code = rfv->c[1];
724 		}
725 		break;
726 	case IPPROTO_MH:
727 		rfv->hlen = 4;
728 		err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen);
729 		if (!err)
730 			fl6->fl6_mh_type = rfv->c[2];
731 	}
732 	return err;
733 }
734 
735 static int raw6_getfrag(void *from, char *to, int offset, int len, int odd,
736 		       struct sk_buff *skb)
737 {
738 	struct raw6_frag_vec *rfv = from;
739 
740 	if (offset < rfv->hlen) {
741 		int copy = min(rfv->hlen - offset, len);
742 
743 		if (skb->ip_summed == CHECKSUM_PARTIAL)
744 			memcpy(to, rfv->c + offset, copy);
745 		else
746 			skb->csum = csum_block_add(
747 				skb->csum,
748 				csum_partial_copy_nocheck(rfv->c + offset,
749 							  to, copy),
750 				odd);
751 
752 		odd = 0;
753 		offset += copy;
754 		to += copy;
755 		len -= copy;
756 
757 		if (!len)
758 			return 0;
759 	}
760 
761 	offset -= rfv->hlen;
762 
763 	return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb);
764 }
765 
766 static int rawv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
767 {
768 	struct ipv6_txoptions *opt_to_free = NULL;
769 	struct ipv6_txoptions opt_space;
770 	DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
771 	struct in6_addr *daddr, *final_p, final;
772 	struct inet_sock *inet = inet_sk(sk);
773 	struct ipv6_pinfo *np = inet6_sk(sk);
774 	struct raw6_sock *rp = raw6_sk(sk);
775 	struct ipv6_txoptions *opt = NULL;
776 	struct ip6_flowlabel *flowlabel = NULL;
777 	struct dst_entry *dst = NULL;
778 	struct raw6_frag_vec rfv;
779 	struct flowi6 fl6;
780 	struct ipcm6_cookie ipc6;
781 	int addr_len = msg->msg_namelen;
782 	int hdrincl;
783 	u16 proto;
784 	int err;
785 
786 	/* Rough check on arithmetic overflow,
787 	   better check is made in ip6_append_data().
788 	 */
789 	if (len > INT_MAX)
790 		return -EMSGSIZE;
791 
792 	/* Mirror BSD error message compatibility */
793 	if (msg->msg_flags & MSG_OOB)
794 		return -EOPNOTSUPP;
795 
796 	/* hdrincl should be READ_ONCE(inet->hdrincl)
797 	 * but READ_ONCE() doesn't work with bit fields.
798 	 * Doing this indirectly yields the same result.
799 	 */
800 	hdrincl = inet->hdrincl;
801 	hdrincl = READ_ONCE(hdrincl);
802 
803 	/*
804 	 *	Get and verify the address.
805 	 */
806 	memset(&fl6, 0, sizeof(fl6));
807 
808 	fl6.flowi6_mark = sk->sk_mark;
809 	fl6.flowi6_uid = sk->sk_uid;
810 
811 	ipcm6_init(&ipc6);
812 	ipc6.sockc.tsflags = sk->sk_tsflags;
813 	ipc6.sockc.mark = sk->sk_mark;
814 
815 	if (sin6) {
816 		if (addr_len < SIN6_LEN_RFC2133)
817 			return -EINVAL;
818 
819 		if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
820 			return -EAFNOSUPPORT;
821 
822 		/* port is the proto value [0..255] carried in nexthdr */
823 		proto = ntohs(sin6->sin6_port);
824 
825 		if (!proto)
826 			proto = inet->inet_num;
827 		else if (proto != inet->inet_num)
828 			return -EINVAL;
829 
830 		if (proto > 255)
831 			return -EINVAL;
832 
833 		daddr = &sin6->sin6_addr;
834 		if (np->sndflow) {
835 			fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
836 			if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
837 				flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
838 				if (IS_ERR(flowlabel))
839 					return -EINVAL;
840 			}
841 		}
842 
843 		/*
844 		 * Otherwise it will be difficult to maintain
845 		 * sk->sk_dst_cache.
846 		 */
847 		if (sk->sk_state == TCP_ESTABLISHED &&
848 		    ipv6_addr_equal(daddr, &sk->sk_v6_daddr))
849 			daddr = &sk->sk_v6_daddr;
850 
851 		if (addr_len >= sizeof(struct sockaddr_in6) &&
852 		    sin6->sin6_scope_id &&
853 		    __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr)))
854 			fl6.flowi6_oif = sin6->sin6_scope_id;
855 	} else {
856 		if (sk->sk_state != TCP_ESTABLISHED)
857 			return -EDESTADDRREQ;
858 
859 		proto = inet->inet_num;
860 		daddr = &sk->sk_v6_daddr;
861 		fl6.flowlabel = np->flow_label;
862 	}
863 
864 	if (fl6.flowi6_oif == 0)
865 		fl6.flowi6_oif = sk->sk_bound_dev_if;
866 
867 	if (msg->msg_controllen) {
868 		opt = &opt_space;
869 		memset(opt, 0, sizeof(struct ipv6_txoptions));
870 		opt->tot_len = sizeof(struct ipv6_txoptions);
871 		ipc6.opt = opt;
872 
873 		err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, &ipc6);
874 		if (err < 0) {
875 			fl6_sock_release(flowlabel);
876 			return err;
877 		}
878 		if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
879 			flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
880 			if (IS_ERR(flowlabel))
881 				return -EINVAL;
882 		}
883 		if (!(opt->opt_nflen|opt->opt_flen))
884 			opt = NULL;
885 	}
886 	if (!opt) {
887 		opt = txopt_get(np);
888 		opt_to_free = opt;
889 	}
890 	if (flowlabel)
891 		opt = fl6_merge_options(&opt_space, flowlabel, opt);
892 	opt = ipv6_fixup_options(&opt_space, opt);
893 
894 	fl6.flowi6_proto = proto;
895 	fl6.flowi6_mark = ipc6.sockc.mark;
896 
897 	if (!hdrincl) {
898 		rfv.msg = msg;
899 		rfv.hlen = 0;
900 		err = rawv6_probe_proto_opt(&rfv, &fl6);
901 		if (err)
902 			goto out;
903 	}
904 
905 	if (!ipv6_addr_any(daddr))
906 		fl6.daddr = *daddr;
907 	else
908 		fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
909 	if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
910 		fl6.saddr = np->saddr;
911 
912 	final_p = fl6_update_dst(&fl6, opt, &final);
913 
914 	if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
915 		fl6.flowi6_oif = np->mcast_oif;
916 	else if (!fl6.flowi6_oif)
917 		fl6.flowi6_oif = np->ucast_oif;
918 	security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6));
919 
920 	if (hdrincl)
921 		fl6.flowi6_flags |= FLOWI_FLAG_KNOWN_NH;
922 
923 	if (ipc6.tclass < 0)
924 		ipc6.tclass = np->tclass;
925 
926 	fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel);
927 
928 	dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p);
929 	if (IS_ERR(dst)) {
930 		err = PTR_ERR(dst);
931 		goto out;
932 	}
933 	if (ipc6.hlimit < 0)
934 		ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
935 
936 	if (ipc6.dontfrag < 0)
937 		ipc6.dontfrag = np->dontfrag;
938 
939 	if (msg->msg_flags&MSG_CONFIRM)
940 		goto do_confirm;
941 
942 back_from_confirm:
943 	if (hdrincl)
944 		err = rawv6_send_hdrinc(sk, msg, len, &fl6, &dst,
945 					msg->msg_flags, &ipc6.sockc);
946 	else {
947 		ipc6.opt = opt;
948 		lock_sock(sk);
949 		err = ip6_append_data(sk, raw6_getfrag, &rfv,
950 			len, 0, &ipc6, &fl6, (struct rt6_info *)dst,
951 			msg->msg_flags);
952 
953 		if (err)
954 			ip6_flush_pending_frames(sk);
955 		else if (!(msg->msg_flags & MSG_MORE))
956 			err = rawv6_push_pending_frames(sk, &fl6, rp);
957 		release_sock(sk);
958 	}
959 done:
960 	dst_release(dst);
961 out:
962 	fl6_sock_release(flowlabel);
963 	txopt_put(opt_to_free);
964 	return err < 0 ? err : len;
965 do_confirm:
966 	if (msg->msg_flags & MSG_PROBE)
967 		dst_confirm_neigh(dst, &fl6.daddr);
968 	if (!(msg->msg_flags & MSG_PROBE) || len)
969 		goto back_from_confirm;
970 	err = 0;
971 	goto done;
972 }
973 
974 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
975 			       sockptr_t optval, int optlen)
976 {
977 	switch (optname) {
978 	case ICMPV6_FILTER:
979 		if (optlen > sizeof(struct icmp6_filter))
980 			optlen = sizeof(struct icmp6_filter);
981 		if (copy_from_sockptr(&raw6_sk(sk)->filter, optval, optlen))
982 			return -EFAULT;
983 		return 0;
984 	default:
985 		return -ENOPROTOOPT;
986 	}
987 
988 	return 0;
989 }
990 
991 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
992 			       char __user *optval, int __user *optlen)
993 {
994 	int len;
995 
996 	switch (optname) {
997 	case ICMPV6_FILTER:
998 		if (get_user(len, optlen))
999 			return -EFAULT;
1000 		if (len < 0)
1001 			return -EINVAL;
1002 		if (len > sizeof(struct icmp6_filter))
1003 			len = sizeof(struct icmp6_filter);
1004 		if (put_user(len, optlen))
1005 			return -EFAULT;
1006 		if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
1007 			return -EFAULT;
1008 		return 0;
1009 	default:
1010 		return -ENOPROTOOPT;
1011 	}
1012 
1013 	return 0;
1014 }
1015 
1016 
1017 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
1018 			       sockptr_t optval, unsigned int optlen)
1019 {
1020 	struct raw6_sock *rp = raw6_sk(sk);
1021 	int val;
1022 
1023 	if (optlen < sizeof(val))
1024 		return -EINVAL;
1025 
1026 	if (copy_from_sockptr(&val, optval, sizeof(val)))
1027 		return -EFAULT;
1028 
1029 	switch (optname) {
1030 	case IPV6_HDRINCL:
1031 		if (sk->sk_type != SOCK_RAW)
1032 			return -EINVAL;
1033 		inet_sk(sk)->hdrincl = !!val;
1034 		return 0;
1035 	case IPV6_CHECKSUM:
1036 		if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
1037 		    level == IPPROTO_IPV6) {
1038 			/*
1039 			 * RFC3542 tells that IPV6_CHECKSUM socket
1040 			 * option in the IPPROTO_IPV6 level is not
1041 			 * allowed on ICMPv6 sockets.
1042 			 * If you want to set it, use IPPROTO_RAW
1043 			 * level IPV6_CHECKSUM socket option
1044 			 * (Linux extension).
1045 			 */
1046 			return -EINVAL;
1047 		}
1048 
1049 		/* You may get strange result with a positive odd offset;
1050 		   RFC2292bis agrees with me. */
1051 		if (val > 0 && (val&1))
1052 			return -EINVAL;
1053 		if (val < 0) {
1054 			rp->checksum = 0;
1055 		} else {
1056 			rp->checksum = 1;
1057 			rp->offset = val;
1058 		}
1059 
1060 		return 0;
1061 
1062 	default:
1063 		return -ENOPROTOOPT;
1064 	}
1065 }
1066 
1067 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1068 			    sockptr_t optval, unsigned int optlen)
1069 {
1070 	switch (level) {
1071 	case SOL_RAW:
1072 		break;
1073 
1074 	case SOL_ICMPV6:
1075 		if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1076 			return -EOPNOTSUPP;
1077 		return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1078 	case SOL_IPV6:
1079 		if (optname == IPV6_CHECKSUM ||
1080 		    optname == IPV6_HDRINCL)
1081 			break;
1082 		fallthrough;
1083 	default:
1084 		return ipv6_setsockopt(sk, level, optname, optval, optlen);
1085 	}
1086 
1087 	return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1088 }
1089 
1090 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1091 			    char __user *optval, int __user *optlen)
1092 {
1093 	struct raw6_sock *rp = raw6_sk(sk);
1094 	int val, len;
1095 
1096 	if (get_user(len, optlen))
1097 		return -EFAULT;
1098 
1099 	switch (optname) {
1100 	case IPV6_HDRINCL:
1101 		val = inet_sk(sk)->hdrincl;
1102 		break;
1103 	case IPV6_CHECKSUM:
1104 		/*
1105 		 * We allow getsockopt() for IPPROTO_IPV6-level
1106 		 * IPV6_CHECKSUM socket option on ICMPv6 sockets
1107 		 * since RFC3542 is silent about it.
1108 		 */
1109 		if (rp->checksum == 0)
1110 			val = -1;
1111 		else
1112 			val = rp->offset;
1113 		break;
1114 
1115 	default:
1116 		return -ENOPROTOOPT;
1117 	}
1118 
1119 	len = min_t(unsigned int, sizeof(int), len);
1120 
1121 	if (put_user(len, optlen))
1122 		return -EFAULT;
1123 	if (copy_to_user(optval, &val, len))
1124 		return -EFAULT;
1125 	return 0;
1126 }
1127 
1128 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1129 			  char __user *optval, int __user *optlen)
1130 {
1131 	switch (level) {
1132 	case SOL_RAW:
1133 		break;
1134 
1135 	case SOL_ICMPV6:
1136 		if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1137 			return -EOPNOTSUPP;
1138 		return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1139 	case SOL_IPV6:
1140 		if (optname == IPV6_CHECKSUM ||
1141 		    optname == IPV6_HDRINCL)
1142 			break;
1143 		fallthrough;
1144 	default:
1145 		return ipv6_getsockopt(sk, level, optname, optval, optlen);
1146 	}
1147 
1148 	return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1149 }
1150 
1151 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1152 {
1153 	switch (cmd) {
1154 	case SIOCOUTQ: {
1155 		int amount = sk_wmem_alloc_get(sk);
1156 
1157 		return put_user(amount, (int __user *)arg);
1158 	}
1159 	case SIOCINQ: {
1160 		struct sk_buff *skb;
1161 		int amount = 0;
1162 
1163 		spin_lock_bh(&sk->sk_receive_queue.lock);
1164 		skb = skb_peek(&sk->sk_receive_queue);
1165 		if (skb)
1166 			amount = skb->len;
1167 		spin_unlock_bh(&sk->sk_receive_queue.lock);
1168 		return put_user(amount, (int __user *)arg);
1169 	}
1170 
1171 	default:
1172 #ifdef CONFIG_IPV6_MROUTE
1173 		return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1174 #else
1175 		return -ENOIOCTLCMD;
1176 #endif
1177 	}
1178 }
1179 
1180 #ifdef CONFIG_COMPAT
1181 static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
1182 {
1183 	switch (cmd) {
1184 	case SIOCOUTQ:
1185 	case SIOCINQ:
1186 		return -ENOIOCTLCMD;
1187 	default:
1188 #ifdef CONFIG_IPV6_MROUTE
1189 		return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
1190 #else
1191 		return -ENOIOCTLCMD;
1192 #endif
1193 	}
1194 }
1195 #endif
1196 
1197 static void rawv6_close(struct sock *sk, long timeout)
1198 {
1199 	if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1200 		ip6_ra_control(sk, -1);
1201 	ip6mr_sk_done(sk);
1202 	sk_common_release(sk);
1203 }
1204 
1205 static void raw6_destroy(struct sock *sk)
1206 {
1207 	lock_sock(sk);
1208 	ip6_flush_pending_frames(sk);
1209 	release_sock(sk);
1210 
1211 	inet6_destroy_sock(sk);
1212 }
1213 
1214 static int rawv6_init_sk(struct sock *sk)
1215 {
1216 	struct raw6_sock *rp = raw6_sk(sk);
1217 
1218 	switch (inet_sk(sk)->inet_num) {
1219 	case IPPROTO_ICMPV6:
1220 		rp->checksum = 1;
1221 		rp->offset   = 2;
1222 		break;
1223 	case IPPROTO_MH:
1224 		rp->checksum = 1;
1225 		rp->offset   = 4;
1226 		break;
1227 	default:
1228 		break;
1229 	}
1230 	return 0;
1231 }
1232 
1233 struct proto rawv6_prot = {
1234 	.name		   = "RAWv6",
1235 	.owner		   = THIS_MODULE,
1236 	.close		   = rawv6_close,
1237 	.destroy	   = raw6_destroy,
1238 	.connect	   = ip6_datagram_connect_v6_only,
1239 	.disconnect	   = __udp_disconnect,
1240 	.ioctl		   = rawv6_ioctl,
1241 	.init		   = rawv6_init_sk,
1242 	.setsockopt	   = rawv6_setsockopt,
1243 	.getsockopt	   = rawv6_getsockopt,
1244 	.sendmsg	   = rawv6_sendmsg,
1245 	.recvmsg	   = rawv6_recvmsg,
1246 	.bind		   = rawv6_bind,
1247 	.backlog_rcv	   = rawv6_rcv_skb,
1248 	.hash		   = raw_hash_sk,
1249 	.unhash		   = raw_unhash_sk,
1250 	.obj_size	   = sizeof(struct raw6_sock),
1251 	.useroffset	   = offsetof(struct raw6_sock, filter),
1252 	.usersize	   = sizeof_field(struct raw6_sock, filter),
1253 	.h.raw_hash	   = &raw_v6_hashinfo,
1254 #ifdef CONFIG_COMPAT
1255 	.compat_ioctl	   = compat_rawv6_ioctl,
1256 #endif
1257 	.diag_destroy	   = raw_abort,
1258 };
1259 
1260 #ifdef CONFIG_PROC_FS
1261 static int raw6_seq_show(struct seq_file *seq, void *v)
1262 {
1263 	if (v == SEQ_START_TOKEN) {
1264 		seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
1265 	} else {
1266 		struct sock *sp = v;
1267 		__u16 srcp  = inet_sk(sp)->inet_num;
1268 		ip6_dgram_sock_seq_show(seq, v, srcp, 0,
1269 					raw_seq_private(seq)->bucket);
1270 	}
1271 	return 0;
1272 }
1273 
1274 static const struct seq_operations raw6_seq_ops = {
1275 	.start =	raw_seq_start,
1276 	.next =		raw_seq_next,
1277 	.stop =		raw_seq_stop,
1278 	.show =		raw6_seq_show,
1279 };
1280 
1281 static int __net_init raw6_init_net(struct net *net)
1282 {
1283 	if (!proc_create_net_data("raw6", 0444, net->proc_net, &raw6_seq_ops,
1284 			sizeof(struct raw_iter_state), &raw_v6_hashinfo))
1285 		return -ENOMEM;
1286 
1287 	return 0;
1288 }
1289 
1290 static void __net_exit raw6_exit_net(struct net *net)
1291 {
1292 	remove_proc_entry("raw6", net->proc_net);
1293 }
1294 
1295 static struct pernet_operations raw6_net_ops = {
1296 	.init = raw6_init_net,
1297 	.exit = raw6_exit_net,
1298 };
1299 
1300 int __init raw6_proc_init(void)
1301 {
1302 	return register_pernet_subsys(&raw6_net_ops);
1303 }
1304 
1305 void raw6_proc_exit(void)
1306 {
1307 	unregister_pernet_subsys(&raw6_net_ops);
1308 }
1309 #endif	/* CONFIG_PROC_FS */
1310 
1311 /* Same as inet6_dgram_ops, sans udp_poll.  */
1312 const struct proto_ops inet6_sockraw_ops = {
1313 	.family		   = PF_INET6,
1314 	.owner		   = THIS_MODULE,
1315 	.release	   = inet6_release,
1316 	.bind		   = inet6_bind,
1317 	.connect	   = inet_dgram_connect,	/* ok		*/
1318 	.socketpair	   = sock_no_socketpair,	/* a do nothing	*/
1319 	.accept		   = sock_no_accept,		/* a do nothing	*/
1320 	.getname	   = inet6_getname,
1321 	.poll		   = datagram_poll,		/* ok		*/
1322 	.ioctl		   = inet6_ioctl,		/* must change  */
1323 	.gettstamp	   = sock_gettstamp,
1324 	.listen		   = sock_no_listen,		/* ok		*/
1325 	.shutdown	   = inet_shutdown,		/* ok		*/
1326 	.setsockopt	   = sock_common_setsockopt,	/* ok		*/
1327 	.getsockopt	   = sock_common_getsockopt,	/* ok		*/
1328 	.sendmsg	   = inet_sendmsg,		/* ok		*/
1329 	.recvmsg	   = sock_common_recvmsg,	/* ok		*/
1330 	.mmap		   = sock_no_mmap,
1331 	.sendpage	   = sock_no_sendpage,
1332 #ifdef CONFIG_COMPAT
1333 	.compat_ioctl	   = inet6_compat_ioctl,
1334 #endif
1335 };
1336 
1337 static struct inet_protosw rawv6_protosw = {
1338 	.type		= SOCK_RAW,
1339 	.protocol	= IPPROTO_IP,	/* wild card */
1340 	.prot		= &rawv6_prot,
1341 	.ops		= &inet6_sockraw_ops,
1342 	.flags		= INET_PROTOSW_REUSE,
1343 };
1344 
1345 int __init rawv6_init(void)
1346 {
1347 	return inet6_register_protosw(&rawv6_protosw);
1348 }
1349 
1350 void rawv6_exit(void)
1351 {
1352 	inet6_unregister_protosw(&rawv6_protosw);
1353 }
1354