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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         int addr_len = msg->msg_namelen;
753         int hlimit = -1;
754         int tclass = -1;
755         int dontfrag = -1;
756         u16 proto;
757         int err;
758 
759         /* Rough check on arithmetic overflow,
760            better check is made in ip6_append_data().
761          */
762         if (len > INT_MAX)
763                 return -EMSGSIZE;
764 
765         /* Mirror BSD error message compatibility */
766         if (msg->msg_flags & MSG_OOB)
767                 return -EOPNOTSUPP;
768 
769         /*
770          *      Get and verify the address.
771          */
772         memset(&fl6, 0, sizeof(fl6));
773 
774         fl6.flowi6_mark = sk->sk_mark;
775 
776         if (sin6) {
777                 if (addr_len < SIN6_LEN_RFC2133)
778                         return -EINVAL;
779 
780                 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
781                         return -EAFNOSUPPORT;
782 
783                 /* port is the proto value [0..255] carried in nexthdr */
784                 proto = ntohs(sin6->sin6_port);
785 
786                 if (!proto)
787                         proto = inet->inet_num;
788                 else if (proto != inet->inet_num)
789                         return -EINVAL;
790 
791                 if (proto > 255)
792                         return -EINVAL;
793 
794                 daddr = &sin6->sin6_addr;
795                 if (np->sndflow) {
796                         fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
797                         if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
798                                 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
799                                 if (!flowlabel)
800                                         return -EINVAL;
801                         }
802                 }
803 
804                 /*
805                  * Otherwise it will be difficult to maintain
806                  * sk->sk_dst_cache.
807                  */
808                 if (sk->sk_state == TCP_ESTABLISHED &&
809                     ipv6_addr_equal(daddr, &sk->sk_v6_daddr))
810                         daddr = &sk->sk_v6_daddr;
811 
812                 if (addr_len >= sizeof(struct sockaddr_in6) &&
813                     sin6->sin6_scope_id &&
814                     __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr)))
815                         fl6.flowi6_oif = sin6->sin6_scope_id;
816         } else {
817                 if (sk->sk_state != TCP_ESTABLISHED)
818                         return -EDESTADDRREQ;
819 
820                 proto = inet->inet_num;
821                 daddr = &sk->sk_v6_daddr;
822                 fl6.flowlabel = np->flow_label;
823         }
824 
825         if (fl6.flowi6_oif == 0)
826                 fl6.flowi6_oif = sk->sk_bound_dev_if;
827 
828         if (msg->msg_controllen) {
829                 opt = &opt_space;
830                 memset(opt, 0, sizeof(struct ipv6_txoptions));
831                 opt->tot_len = sizeof(struct ipv6_txoptions);
832 
833                 err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt,
834                                             &hlimit, &tclass, &dontfrag);
835                 if (err < 0) {
836                         fl6_sock_release(flowlabel);
837                         return err;
838                 }
839                 if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
840                         flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
841                         if (!flowlabel)
842                                 return -EINVAL;
843                 }
844                 if (!(opt->opt_nflen|opt->opt_flen))
845                         opt = NULL;
846         }
847         if (!opt) {
848                 opt = txopt_get(np);
849                 opt_to_free = opt;
850                 }
851         if (flowlabel)
852                 opt = fl6_merge_options(&opt_space, flowlabel, opt);
853         opt = ipv6_fixup_options(&opt_space, opt);
854 
855         fl6.flowi6_proto = proto;
856         rfv.msg = msg;
857         rfv.hlen = 0;
858         err = rawv6_probe_proto_opt(&rfv, &fl6);
859         if (err)
860                 goto out;
861 
862         if (!ipv6_addr_any(daddr))
863                 fl6.daddr = *daddr;
864         else
865                 fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
866         if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
867                 fl6.saddr = np->saddr;
868 
869         final_p = fl6_update_dst(&fl6, opt, &final);
870 
871         if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
872                 fl6.flowi6_oif = np->mcast_oif;
873         else if (!fl6.flowi6_oif)
874                 fl6.flowi6_oif = np->ucast_oif;
875         security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
876 
877         if (inet->hdrincl)
878                 fl6.flowi6_flags |= FLOWI_FLAG_KNOWN_NH;
879 
880         dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
881         if (IS_ERR(dst)) {
882                 err = PTR_ERR(dst);
883                 goto out;
884         }
885         if (hlimit < 0)
886                 hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
887 
888         if (tclass < 0)
889                 tclass = np->tclass;
890 
891         if (dontfrag < 0)
892                 dontfrag = np->dontfrag;
893 
894         if (msg->msg_flags&MSG_CONFIRM)
895                 goto do_confirm;
896 
897 back_from_confirm:
898         if (inet->hdrincl)
899                 err = rawv6_send_hdrinc(sk, msg, len, &fl6, &dst, msg->msg_flags);
900         else {
901                 lock_sock(sk);
902                 err = ip6_append_data(sk, raw6_getfrag, &rfv,
903                         len, 0, hlimit, tclass, opt, &fl6, (struct rt6_info *)dst,
904                         msg->msg_flags, dontfrag);
905 
906                 if (err)
907                         ip6_flush_pending_frames(sk);
908                 else if (!(msg->msg_flags & MSG_MORE))
909                         err = rawv6_push_pending_frames(sk, &fl6, rp);
910                 release_sock(sk);
911         }
912 done:
913         dst_release(dst);
914 out:
915         fl6_sock_release(flowlabel);
916         txopt_put(opt_to_free);
917         return err < 0 ? err : len;
918 do_confirm:
919         dst_confirm(dst);
920         if (!(msg->msg_flags & MSG_PROBE) || len)
921                 goto back_from_confirm;
922         err = 0;
923         goto done;
924 }
925 
926 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
927                                char __user *optval, int optlen)
928 {
929         switch (optname) {
930         case ICMPV6_FILTER:
931                 if (optlen > sizeof(struct icmp6_filter))
932                         optlen = sizeof(struct icmp6_filter);
933                 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
934                         return -EFAULT;
935                 return 0;
936         default:
937                 return -ENOPROTOOPT;
938         }
939 
940         return 0;
941 }
942 
943 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
944                                char __user *optval, int __user *optlen)
945 {
946         int len;
947 
948         switch (optname) {
949         case ICMPV6_FILTER:
950                 if (get_user(len, optlen))
951                         return -EFAULT;
952                 if (len < 0)
953                         return -EINVAL;
954                 if (len > sizeof(struct icmp6_filter))
955                         len = sizeof(struct icmp6_filter);
956                 if (put_user(len, optlen))
957                         return -EFAULT;
958                 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
959                         return -EFAULT;
960                 return 0;
961         default:
962                 return -ENOPROTOOPT;
963         }
964 
965         return 0;
966 }
967 
968 
969 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
970                             char __user *optval, unsigned int optlen)
971 {
972         struct raw6_sock *rp = raw6_sk(sk);
973         int val;
974 
975         if (get_user(val, (int __user *)optval))
976                 return -EFAULT;
977 
978         switch (optname) {
979         case IPV6_HDRINCL:
980                 if (sk->sk_type != SOCK_RAW)
981                         return -EINVAL;
982                 inet_sk(sk)->hdrincl = !!val;
983                 return 0;
984         case IPV6_CHECKSUM:
985                 if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
986                     level == IPPROTO_IPV6) {
987                         /*
988                          * RFC3542 tells that IPV6_CHECKSUM socket
989                          * option in the IPPROTO_IPV6 level is not
990                          * allowed on ICMPv6 sockets.
991                          * If you want to set it, use IPPROTO_RAW
992                          * level IPV6_CHECKSUM socket option
993                          * (Linux extension).
994                          */
995                         return -EINVAL;
996                 }
997 
998                 /* You may get strange result with a positive odd offset;
999                    RFC2292bis agrees with me. */
1000                 if (val > 0 && (val&1))
1001                         return -EINVAL;
1002                 if (val < 0) {
1003                         rp->checksum = 0;
1004                 } else {
1005                         rp->checksum = 1;
1006                         rp->offset = val;
1007                 }
1008 
1009                 return 0;
1010 
1011         default:
1012                 return -ENOPROTOOPT;
1013         }
1014 }
1015 
1016 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1017                           char __user *optval, unsigned int optlen)
1018 {
1019         switch (level) {
1020         case SOL_RAW:
1021                 break;
1022 
1023         case SOL_ICMPV6:
1024                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1025                         return -EOPNOTSUPP;
1026                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1027         case SOL_IPV6:
1028                 if (optname == IPV6_CHECKSUM ||
1029                     optname == IPV6_HDRINCL)
1030                         break;
1031         default:
1032                 return ipv6_setsockopt(sk, level, optname, optval, optlen);
1033         }
1034 
1035         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1036 }
1037 
1038 #ifdef CONFIG_COMPAT
1039 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1040                                    char __user *optval, unsigned int optlen)
1041 {
1042         switch (level) {
1043         case SOL_RAW:
1044                 break;
1045         case SOL_ICMPV6:
1046                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1047                         return -EOPNOTSUPP;
1048                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1049         case SOL_IPV6:
1050                 if (optname == IPV6_CHECKSUM ||
1051                     optname == IPV6_HDRINCL)
1052                         break;
1053         default:
1054                 return compat_ipv6_setsockopt(sk, level, optname,
1055                                               optval, optlen);
1056         }
1057         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1058 }
1059 #endif
1060 
1061 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1062                             char __user *optval, int __user *optlen)
1063 {
1064         struct raw6_sock *rp = raw6_sk(sk);
1065         int val, len;
1066 
1067         if (get_user(len, optlen))
1068                 return -EFAULT;
1069 
1070         switch (optname) {
1071         case IPV6_HDRINCL:
1072                 val = inet_sk(sk)->hdrincl;
1073                 break;
1074         case IPV6_CHECKSUM:
1075                 /*
1076                  * We allow getsockopt() for IPPROTO_IPV6-level
1077                  * IPV6_CHECKSUM socket option on ICMPv6 sockets
1078                  * since RFC3542 is silent about it.
1079                  */
1080                 if (rp->checksum == 0)
1081                         val = -1;
1082                 else
1083                         val = rp->offset;
1084                 break;
1085 
1086         default:
1087                 return -ENOPROTOOPT;
1088         }
1089 
1090         len = min_t(unsigned int, sizeof(int), len);
1091 
1092         if (put_user(len, optlen))
1093                 return -EFAULT;
1094         if (copy_to_user(optval, &val, len))
1095                 return -EFAULT;
1096         return 0;
1097 }
1098 
1099 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1100                           char __user *optval, int __user *optlen)
1101 {
1102         switch (level) {
1103         case SOL_RAW:
1104                 break;
1105 
1106         case SOL_ICMPV6:
1107                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1108                         return -EOPNOTSUPP;
1109                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1110         case SOL_IPV6:
1111                 if (optname == IPV6_CHECKSUM ||
1112                     optname == IPV6_HDRINCL)
1113                         break;
1114         default:
1115                 return ipv6_getsockopt(sk, level, optname, optval, optlen);
1116         }
1117 
1118         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1119 }
1120 
1121 #ifdef CONFIG_COMPAT
1122 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1123                                    char __user *optval, int __user *optlen)
1124 {
1125         switch (level) {
1126         case SOL_RAW:
1127                 break;
1128         case SOL_ICMPV6:
1129                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1130                         return -EOPNOTSUPP;
1131                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1132         case SOL_IPV6:
1133                 if (optname == IPV6_CHECKSUM ||
1134                     optname == IPV6_HDRINCL)
1135                         break;
1136         default:
1137                 return compat_ipv6_getsockopt(sk, level, optname,
1138                                               optval, optlen);
1139         }
1140         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1141 }
1142 #endif
1143 
1144 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1145 {
1146         switch (cmd) {
1147         case SIOCOUTQ: {
1148                 int amount = sk_wmem_alloc_get(sk);
1149 
1150                 return put_user(amount, (int __user *)arg);
1151         }
1152         case SIOCINQ: {
1153                 struct sk_buff *skb;
1154                 int amount = 0;
1155 
1156                 spin_lock_bh(&sk->sk_receive_queue.lock);
1157                 skb = skb_peek(&sk->sk_receive_queue);
1158                 if (skb)
1159                         amount = skb_tail_pointer(skb) -
1160                                 skb_transport_header(skb);
1161                 spin_unlock_bh(&sk->sk_receive_queue.lock);
1162                 return put_user(amount, (int __user *)arg);
1163         }
1164 
1165         default:
1166 #ifdef CONFIG_IPV6_MROUTE
1167                 return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1168 #else
1169                 return -ENOIOCTLCMD;
1170 #endif
1171         }
1172 }
1173 
1174 #ifdef CONFIG_COMPAT
1175 static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
1176 {
1177         switch (cmd) {
1178         case SIOCOUTQ:
1179         case SIOCINQ:
1180                 return -ENOIOCTLCMD;
1181         default:
1182 #ifdef CONFIG_IPV6_MROUTE
1183                 return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
1184 #else
1185                 return -ENOIOCTLCMD;
1186 #endif
1187         }
1188 }
1189 #endif
1190 
1191 static void rawv6_close(struct sock *sk, long timeout)
1192 {
1193         if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1194                 ip6_ra_control(sk, -1);
1195         ip6mr_sk_done(sk);
1196         sk_common_release(sk);
1197 }
1198 
1199 static void raw6_destroy(struct sock *sk)
1200 {
1201         lock_sock(sk);
1202         ip6_flush_pending_frames(sk);
1203         release_sock(sk);
1204 
1205         inet6_destroy_sock(sk);
1206 }
1207 
1208 static int rawv6_init_sk(struct sock *sk)
1209 {
1210         struct raw6_sock *rp = raw6_sk(sk);
1211 
1212         switch (inet_sk(sk)->inet_num) {
1213         case IPPROTO_ICMPV6:
1214                 rp->checksum = 1;
1215                 rp->offset   = 2;
1216                 break;
1217         case IPPROTO_MH:
1218                 rp->checksum = 1;
1219                 rp->offset   = 4;
1220                 break;
1221         default:
1222                 break;
1223         }
1224         return 0;
1225 }
1226 
1227 struct proto rawv6_prot = {
1228         .name              = "RAWv6",
1229         .owner             = THIS_MODULE,
1230         .close             = rawv6_close,
1231         .destroy           = raw6_destroy,
1232         .connect           = ip6_datagram_connect_v6_only,
1233         .disconnect        = udp_disconnect,
1234         .ioctl             = rawv6_ioctl,
1235         .init              = rawv6_init_sk,
1236         .setsockopt        = rawv6_setsockopt,
1237         .getsockopt        = rawv6_getsockopt,
1238         .sendmsg           = rawv6_sendmsg,
1239         .recvmsg           = rawv6_recvmsg,
1240         .bind              = rawv6_bind,
1241         .backlog_rcv       = rawv6_rcv_skb,
1242         .hash              = raw_hash_sk,
1243         .unhash            = raw_unhash_sk,
1244         .obj_size          = sizeof(struct raw6_sock),
1245         .h.raw_hash        = &raw_v6_hashinfo,
1246 #ifdef CONFIG_COMPAT
1247         .compat_setsockopt = compat_rawv6_setsockopt,
1248         .compat_getsockopt = compat_rawv6_getsockopt,
1249         .compat_ioctl      = compat_rawv6_ioctl,
1250 #endif
1251 };
1252 
1253 #ifdef CONFIG_PROC_FS
1254 static int raw6_seq_show(struct seq_file *seq, void *v)
1255 {
1256         if (v == SEQ_START_TOKEN) {
1257                 seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
1258         } else {
1259                 struct sock *sp = v;
1260                 __u16 srcp  = inet_sk(sp)->inet_num;
1261                 ip6_dgram_sock_seq_show(seq, v, srcp, 0,
1262                                         raw_seq_private(seq)->bucket);
1263         }
1264         return 0;
1265 }
1266 
1267 static const struct seq_operations raw6_seq_ops = {
1268         .start =        raw_seq_start,
1269         .next =         raw_seq_next,
1270         .stop =         raw_seq_stop,
1271         .show =         raw6_seq_show,
1272 };
1273 
1274 static int raw6_seq_open(struct inode *inode, struct file *file)
1275 {
1276         return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1277 }
1278 
1279 static const struct file_operations raw6_seq_fops = {
1280         .owner =        THIS_MODULE,
1281         .open =         raw6_seq_open,
1282         .read =         seq_read,
1283         .llseek =       seq_lseek,
1284         .release =      seq_release_net,
1285 };
1286 
1287 static int __net_init raw6_init_net(struct net *net)
1288 {
1289         if (!proc_create("raw6", S_IRUGO, net->proc_net, &raw6_seq_fops))
1290                 return -ENOMEM;
1291 
1292         return 0;
1293 }
1294 
1295 static void __net_exit raw6_exit_net(struct net *net)
1296 {
1297         remove_proc_entry("raw6", net->proc_net);
1298 }
1299 
1300 static struct pernet_operations raw6_net_ops = {
1301         .init = raw6_init_net,
1302         .exit = raw6_exit_net,
1303 };
1304 
1305 int __init raw6_proc_init(void)
1306 {
1307         return register_pernet_subsys(&raw6_net_ops);
1308 }
1309 
1310 void raw6_proc_exit(void)
1311 {
1312         unregister_pernet_subsys(&raw6_net_ops);
1313 }
1314 #endif  /* CONFIG_PROC_FS */
1315 
1316 /* Same as inet6_dgram_ops, sans udp_poll.  */
1317 static const struct proto_ops inet6_sockraw_ops = {
1318         .family            = PF_INET6,
1319         .owner             = THIS_MODULE,
1320         .release           = inet6_release,
1321         .bind              = inet6_bind,
1322         .connect           = inet_dgram_connect,        /* ok           */
1323         .socketpair        = sock_no_socketpair,        /* a do nothing */
1324         .accept            = sock_no_accept,            /* a do nothing */
1325         .getname           = inet6_getname,
1326         .poll              = datagram_poll,             /* ok           */
1327         .ioctl             = inet6_ioctl,               /* must change  */
1328         .listen            = sock_no_listen,            /* ok           */
1329         .shutdown          = inet_shutdown,             /* ok           */
1330         .setsockopt        = sock_common_setsockopt,    /* ok           */
1331         .getsockopt        = sock_common_getsockopt,    /* ok           */
1332         .sendmsg           = inet_sendmsg,              /* ok           */
1333         .recvmsg           = sock_common_recvmsg,       /* ok           */
1334         .mmap              = sock_no_mmap,
1335         .sendpage          = sock_no_sendpage,
1336 #ifdef CONFIG_COMPAT
1337         .compat_setsockopt = compat_sock_common_setsockopt,
1338         .compat_getsockopt = compat_sock_common_getsockopt,
1339 #endif
1340 };
1341 
1342 static struct inet_protosw rawv6_protosw = {
1343         .type           = SOCK_RAW,
1344         .protocol       = IPPROTO_IP,   /* wild card */
1345         .prot           = &rawv6_prot,
1346         .ops            = &inet6_sockraw_ops,
1347         .flags          = INET_PROTOSW_REUSE,
1348 };
1349 
1350 int __init rawv6_init(void)
1351 {
1352         return inet6_register_protosw(&rawv6_protosw);
1353 }
1354 
1355 void rawv6_exit(void)
1356 {
1357         inet6_unregister_protosw(&rawv6_protosw);
1358 }
1359 

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