xref: /openbmc/linux/net/ipv6/raw.c (revision b9ddb2500e7e544410f38476ab928fc2fe01e381)
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  		    !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), 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 (copy_from_sockptr(&val, optval, sizeof(val)))
1024  		return -EFAULT;
1025  
1026  	switch (optname) {
1027  	case IPV6_HDRINCL:
1028  		if (sk->sk_type != SOCK_RAW)
1029  			return -EINVAL;
1030  		inet_sk(sk)->hdrincl = !!val;
1031  		return 0;
1032  	case IPV6_CHECKSUM:
1033  		if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
1034  		    level == IPPROTO_IPV6) {
1035  			/*
1036  			 * RFC3542 tells that IPV6_CHECKSUM socket
1037  			 * option in the IPPROTO_IPV6 level is not
1038  			 * allowed on ICMPv6 sockets.
1039  			 * If you want to set it, use IPPROTO_RAW
1040  			 * level IPV6_CHECKSUM socket option
1041  			 * (Linux extension).
1042  			 */
1043  			return -EINVAL;
1044  		}
1045  
1046  		/* You may get strange result with a positive odd offset;
1047  		   RFC2292bis agrees with me. */
1048  		if (val > 0 && (val&1))
1049  			return -EINVAL;
1050  		if (val < 0) {
1051  			rp->checksum = 0;
1052  		} else {
1053  			rp->checksum = 1;
1054  			rp->offset = val;
1055  		}
1056  
1057  		return 0;
1058  
1059  	default:
1060  		return -ENOPROTOOPT;
1061  	}
1062  }
1063  
1064  static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1065  			    sockptr_t optval, unsigned int optlen)
1066  {
1067  	switch (level) {
1068  	case SOL_RAW:
1069  		break;
1070  
1071  	case SOL_ICMPV6:
1072  		if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1073  			return -EOPNOTSUPP;
1074  		return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1075  	case SOL_IPV6:
1076  		if (optname == IPV6_CHECKSUM ||
1077  		    optname == IPV6_HDRINCL)
1078  			break;
1079  		fallthrough;
1080  	default:
1081  		return ipv6_setsockopt(sk, level, optname, optval, optlen);
1082  	}
1083  
1084  	return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1085  }
1086  
1087  static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1088  			    char __user *optval, int __user *optlen)
1089  {
1090  	struct raw6_sock *rp = raw6_sk(sk);
1091  	int val, len;
1092  
1093  	if (get_user(len, optlen))
1094  		return -EFAULT;
1095  
1096  	switch (optname) {
1097  	case IPV6_HDRINCL:
1098  		val = inet_sk(sk)->hdrincl;
1099  		break;
1100  	case IPV6_CHECKSUM:
1101  		/*
1102  		 * We allow getsockopt() for IPPROTO_IPV6-level
1103  		 * IPV6_CHECKSUM socket option on ICMPv6 sockets
1104  		 * since RFC3542 is silent about it.
1105  		 */
1106  		if (rp->checksum == 0)
1107  			val = -1;
1108  		else
1109  			val = rp->offset;
1110  		break;
1111  
1112  	default:
1113  		return -ENOPROTOOPT;
1114  	}
1115  
1116  	len = min_t(unsigned int, sizeof(int), len);
1117  
1118  	if (put_user(len, optlen))
1119  		return -EFAULT;
1120  	if (copy_to_user(optval, &val, len))
1121  		return -EFAULT;
1122  	return 0;
1123  }
1124  
1125  static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1126  			  char __user *optval, int __user *optlen)
1127  {
1128  	switch (level) {
1129  	case SOL_RAW:
1130  		break;
1131  
1132  	case SOL_ICMPV6:
1133  		if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1134  			return -EOPNOTSUPP;
1135  		return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1136  	case SOL_IPV6:
1137  		if (optname == IPV6_CHECKSUM ||
1138  		    optname == IPV6_HDRINCL)
1139  			break;
1140  		fallthrough;
1141  	default:
1142  		return ipv6_getsockopt(sk, level, optname, optval, optlen);
1143  	}
1144  
1145  	return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1146  }
1147  
1148  static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1149  {
1150  	switch (cmd) {
1151  	case SIOCOUTQ: {
1152  		int amount = sk_wmem_alloc_get(sk);
1153  
1154  		return put_user(amount, (int __user *)arg);
1155  	}
1156  	case SIOCINQ: {
1157  		struct sk_buff *skb;
1158  		int amount = 0;
1159  
1160  		spin_lock_bh(&sk->sk_receive_queue.lock);
1161  		skb = skb_peek(&sk->sk_receive_queue);
1162  		if (skb)
1163  			amount = skb->len;
1164  		spin_unlock_bh(&sk->sk_receive_queue.lock);
1165  		return put_user(amount, (int __user *)arg);
1166  	}
1167  
1168  	default:
1169  #ifdef CONFIG_IPV6_MROUTE
1170  		return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1171  #else
1172  		return -ENOIOCTLCMD;
1173  #endif
1174  	}
1175  }
1176  
1177  #ifdef CONFIG_COMPAT
1178  static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
1179  {
1180  	switch (cmd) {
1181  	case SIOCOUTQ:
1182  	case SIOCINQ:
1183  		return -ENOIOCTLCMD;
1184  	default:
1185  #ifdef CONFIG_IPV6_MROUTE
1186  		return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
1187  #else
1188  		return -ENOIOCTLCMD;
1189  #endif
1190  	}
1191  }
1192  #endif
1193  
1194  static void rawv6_close(struct sock *sk, long timeout)
1195  {
1196  	if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1197  		ip6_ra_control(sk, -1);
1198  	ip6mr_sk_done(sk);
1199  	sk_common_release(sk);
1200  }
1201  
1202  static void raw6_destroy(struct sock *sk)
1203  {
1204  	lock_sock(sk);
1205  	ip6_flush_pending_frames(sk);
1206  	release_sock(sk);
1207  
1208  	inet6_destroy_sock(sk);
1209  }
1210  
1211  static int rawv6_init_sk(struct sock *sk)
1212  {
1213  	struct raw6_sock *rp = raw6_sk(sk);
1214  
1215  	switch (inet_sk(sk)->inet_num) {
1216  	case IPPROTO_ICMPV6:
1217  		rp->checksum = 1;
1218  		rp->offset   = 2;
1219  		break;
1220  	case IPPROTO_MH:
1221  		rp->checksum = 1;
1222  		rp->offset   = 4;
1223  		break;
1224  	default:
1225  		break;
1226  	}
1227  	return 0;
1228  }
1229  
1230  struct proto rawv6_prot = {
1231  	.name		   = "RAWv6",
1232  	.owner		   = THIS_MODULE,
1233  	.close		   = rawv6_close,
1234  	.destroy	   = raw6_destroy,
1235  	.connect	   = ip6_datagram_connect_v6_only,
1236  	.disconnect	   = __udp_disconnect,
1237  	.ioctl		   = rawv6_ioctl,
1238  	.init		   = rawv6_init_sk,
1239  	.setsockopt	   = rawv6_setsockopt,
1240  	.getsockopt	   = rawv6_getsockopt,
1241  	.sendmsg	   = rawv6_sendmsg,
1242  	.recvmsg	   = rawv6_recvmsg,
1243  	.bind		   = rawv6_bind,
1244  	.backlog_rcv	   = rawv6_rcv_skb,
1245  	.hash		   = raw_hash_sk,
1246  	.unhash		   = raw_unhash_sk,
1247  	.obj_size	   = sizeof(struct raw6_sock),
1248  	.useroffset	   = offsetof(struct raw6_sock, filter),
1249  	.usersize	   = sizeof_field(struct raw6_sock, filter),
1250  	.h.raw_hash	   = &raw_v6_hashinfo,
1251  #ifdef CONFIG_COMPAT
1252  	.compat_ioctl	   = compat_rawv6_ioctl,
1253  #endif
1254  	.diag_destroy	   = raw_abort,
1255  };
1256  
1257  #ifdef CONFIG_PROC_FS
1258  static int raw6_seq_show(struct seq_file *seq, void *v)
1259  {
1260  	if (v == SEQ_START_TOKEN) {
1261  		seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
1262  	} else {
1263  		struct sock *sp = v;
1264  		__u16 srcp  = inet_sk(sp)->inet_num;
1265  		ip6_dgram_sock_seq_show(seq, v, srcp, 0,
1266  					raw_seq_private(seq)->bucket);
1267  	}
1268  	return 0;
1269  }
1270  
1271  static const struct seq_operations raw6_seq_ops = {
1272  	.start =	raw_seq_start,
1273  	.next =		raw_seq_next,
1274  	.stop =		raw_seq_stop,
1275  	.show =		raw6_seq_show,
1276  };
1277  
1278  static int __net_init raw6_init_net(struct net *net)
1279  {
1280  	if (!proc_create_net_data("raw6", 0444, net->proc_net, &raw6_seq_ops,
1281  			sizeof(struct raw_iter_state), &raw_v6_hashinfo))
1282  		return -ENOMEM;
1283  
1284  	return 0;
1285  }
1286  
1287  static void __net_exit raw6_exit_net(struct net *net)
1288  {
1289  	remove_proc_entry("raw6", net->proc_net);
1290  }
1291  
1292  static struct pernet_operations raw6_net_ops = {
1293  	.init = raw6_init_net,
1294  	.exit = raw6_exit_net,
1295  };
1296  
1297  int __init raw6_proc_init(void)
1298  {
1299  	return register_pernet_subsys(&raw6_net_ops);
1300  }
1301  
1302  void raw6_proc_exit(void)
1303  {
1304  	unregister_pernet_subsys(&raw6_net_ops);
1305  }
1306  #endif	/* CONFIG_PROC_FS */
1307  
1308  /* Same as inet6_dgram_ops, sans udp_poll.  */
1309  const struct proto_ops inet6_sockraw_ops = {
1310  	.family		   = PF_INET6,
1311  	.owner		   = THIS_MODULE,
1312  	.release	   = inet6_release,
1313  	.bind		   = inet6_bind,
1314  	.connect	   = inet_dgram_connect,	/* ok		*/
1315  	.socketpair	   = sock_no_socketpair,	/* a do nothing	*/
1316  	.accept		   = sock_no_accept,		/* a do nothing	*/
1317  	.getname	   = inet6_getname,
1318  	.poll		   = datagram_poll,		/* ok		*/
1319  	.ioctl		   = inet6_ioctl,		/* must change  */
1320  	.gettstamp	   = sock_gettstamp,
1321  	.listen		   = sock_no_listen,		/* ok		*/
1322  	.shutdown	   = inet_shutdown,		/* ok		*/
1323  	.setsockopt	   = sock_common_setsockopt,	/* ok		*/
1324  	.getsockopt	   = sock_common_getsockopt,	/* ok		*/
1325  	.sendmsg	   = inet_sendmsg,		/* ok		*/
1326  	.recvmsg	   = sock_common_recvmsg,	/* ok		*/
1327  	.mmap		   = sock_no_mmap,
1328  	.sendpage	   = sock_no_sendpage,
1329  #ifdef CONFIG_COMPAT
1330  	.compat_ioctl	   = inet6_compat_ioctl,
1331  #endif
1332  };
1333  
1334  static struct inet_protosw rawv6_protosw = {
1335  	.type		= SOCK_RAW,
1336  	.protocol	= IPPROTO_IP,	/* wild card */
1337  	.prot		= &rawv6_prot,
1338  	.ops		= &inet6_sockraw_ops,
1339  	.flags		= INET_PROTOSW_REUSE,
1340  };
1341  
1342  int __init rawv6_init(void)
1343  {
1344  	return inet6_register_protosw(&rawv6_protosw);
1345  }
1346  
1347  void rawv6_exit(void)
1348  {
1349  	inet6_unregister_protosw(&rawv6_protosw);
1350  }
1351