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TOMOYO Linux Cross Reference
Linux/net/ipv6/raw.c

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

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