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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 <asm/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 defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 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 static struct raw_hashinfo raw_v6_hashinfo = {
 67         .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
 68 };
 69 
 70 static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
 71                 unsigned short num, const struct in6_addr *loc_addr,
 72                 const struct in6_addr *rmt_addr, int dif)
 73 {
 74         struct hlist_node *node;
 75         int is_multicast = ipv6_addr_is_multicast(loc_addr);
 76 
 77         sk_for_each_from(sk, node)
 78                 if (inet_sk(sk)->inet_num == num) {
 79                         struct ipv6_pinfo *np = inet6_sk(sk);
 80 
 81                         if (!net_eq(sock_net(sk), net))
 82                                 continue;
 83 
 84                         if (!ipv6_addr_any(&np->daddr) &&
 85                             !ipv6_addr_equal(&np->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(&np->rcv_saddr)) {
 92                                 if (ipv6_addr_equal(&np->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         hdr = skb_header_pointer(skb, skb_transport_offset(skb),
116                                  sizeof(_hdr), &_hdr);
117         if (hdr) {
118                 const __u32 *data = &raw6_sk(sk)->filter.data[0];
119                 unsigned int type = hdr->icmp6_type;
120 
121                 return (data[type >> 5] & (1U << (type & 31))) != 0;
122         }
123         return 1;
124 }
125 
126 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
127 typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb);
128 
129 static mh_filter_t __rcu *mh_filter __read_mostly;
130 
131 int rawv6_mh_filter_register(mh_filter_t filter)
132 {
133         rcu_assign_pointer(mh_filter, filter);
134         return 0;
135 }
136 EXPORT_SYMBOL(rawv6_mh_filter_register);
137 
138 int rawv6_mh_filter_unregister(mh_filter_t filter)
139 {
140         RCU_INIT_POINTER(mh_filter, NULL);
141         synchronize_rcu();
142         return 0;
143 }
144 EXPORT_SYMBOL(rawv6_mh_filter_unregister);
145 
146 #endif
147 
148 /*
149  *      demultiplex raw sockets.
150  *      (should consider queueing the skb in the sock receive_queue
151  *      without calling rawv6.c)
152  *
153  *      Caller owns SKB so we must make clones.
154  */
155 static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
156 {
157         const struct in6_addr *saddr;
158         const struct in6_addr *daddr;
159         struct sock *sk;
160         int delivered = 0;
161         __u8 hash;
162         struct net *net;
163 
164         saddr = &ipv6_hdr(skb)->saddr;
165         daddr = saddr + 1;
166 
167         hash = nexthdr & (MAX_INET_PROTOS - 1);
168 
169         read_lock(&raw_v6_hashinfo.lock);
170         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
171 
172         if (sk == NULL)
173                 goto out;
174 
175         net = dev_net(skb->dev);
176         sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
177 
178         while (sk) {
179                 int filtered;
180 
181                 delivered = 1;
182                 switch (nexthdr) {
183                 case IPPROTO_ICMPV6:
184                         filtered = icmpv6_filter(sk, skb);
185                         break;
186 
187 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
188                 case IPPROTO_MH:
189                 {
190                         /* XXX: To validate MH only once for each packet,
191                          * this is placed here. It should be after checking
192                          * xfrm policy, however it doesn't. The checking xfrm
193                          * policy is placed in rawv6_rcv() because it is
194                          * required for each socket.
195                          */
196                         mh_filter_t *filter;
197 
198                         filter = rcu_dereference(mh_filter);
199                         filtered = filter ? (*filter)(sk, skb) : 0;
200                         break;
201                 }
202 #endif
203                 default:
204                         filtered = 0;
205                         break;
206                 }
207 
208                 if (filtered < 0)
209                         break;
210                 if (filtered == 0) {
211                         struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
212 
213                         /* Not releasing hash table! */
214                         if (clone) {
215                                 nf_reset(clone);
216                                 rawv6_rcv(sk, clone);
217                         }
218                 }
219                 sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
220                                      IP6CB(skb)->iif);
221         }
222 out:
223         read_unlock(&raw_v6_hashinfo.lock);
224         return delivered;
225 }
226 
227 int raw6_local_deliver(struct sk_buff *skb, int nexthdr)
228 {
229         struct sock *raw_sk;
230 
231         raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]);
232         if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
233                 raw_sk = NULL;
234 
235         return raw_sk != NULL;
236 }
237 
238 /* This cleans up af_inet6 a bit. -DaveM */
239 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
240 {
241         struct inet_sock *inet = inet_sk(sk);
242         struct ipv6_pinfo *np = inet6_sk(sk);
243         struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
244         __be32 v4addr = 0;
245         int addr_type;
246         int err;
247 
248         if (addr_len < SIN6_LEN_RFC2133)
249                 return -EINVAL;
250         addr_type = ipv6_addr_type(&addr->sin6_addr);
251 
252         /* Raw sockets are IPv6 only */
253         if (addr_type == IPV6_ADDR_MAPPED)
254                 return -EADDRNOTAVAIL;
255 
256         lock_sock(sk);
257 
258         err = -EINVAL;
259         if (sk->sk_state != TCP_CLOSE)
260                 goto out;
261 
262         rcu_read_lock();
263         /* Check if the address belongs to the host. */
264         if (addr_type != IPV6_ADDR_ANY) {
265                 struct net_device *dev = NULL;
266 
267                 if (addr_type & IPV6_ADDR_LINKLOCAL) {
268                         if (addr_len >= sizeof(struct sockaddr_in6) &&
269                             addr->sin6_scope_id) {
270                                 /* Override any existing binding, if another
271                                  * one is supplied by user.
272                                  */
273                                 sk->sk_bound_dev_if = addr->sin6_scope_id;
274                         }
275 
276                         /* Binding to link-local address requires an interface */
277                         if (!sk->sk_bound_dev_if)
278                                 goto out_unlock;
279 
280                         err = -ENODEV;
281                         dev = dev_get_by_index_rcu(sock_net(sk),
282                                                    sk->sk_bound_dev_if);
283                         if (!dev)
284                                 goto out_unlock;
285                 }
286 
287                 /* ipv4 addr of the socket is invalid.  Only the
288                  * unspecified and mapped address have a v4 equivalent.
289                  */
290                 v4addr = LOOPBACK4_IPV6;
291                 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
292                         err = -EADDRNOTAVAIL;
293                         if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
294                                            dev, 0)) {
295                                 goto out_unlock;
296                         }
297                 }
298         }
299 
300         inet->inet_rcv_saddr = inet->inet_saddr = v4addr;
301         np->rcv_saddr = addr->sin6_addr;
302         if (!(addr_type & IPV6_ADDR_MULTICAST))
303                 np->saddr = addr->sin6_addr;
304         err = 0;
305 out_unlock:
306         rcu_read_unlock();
307 out:
308         release_sock(sk);
309         return err;
310 }
311 
312 static void rawv6_err(struct sock *sk, struct sk_buff *skb,
313                struct inet6_skb_parm *opt,
314                u8 type, u8 code, int offset, __be32 info)
315 {
316         struct inet_sock *inet = inet_sk(sk);
317         struct ipv6_pinfo *np = inet6_sk(sk);
318         int err;
319         int harderr;
320 
321         /* Report error on raw socket, if:
322            1. User requested recverr.
323            2. Socket is connected (otherwise the error indication
324               is useless without recverr and error is hard.
325          */
326         if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
327                 return;
328 
329         harderr = icmpv6_err_convert(type, code, &err);
330         if (type == ICMPV6_PKT_TOOBIG)
331                 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
332 
333         if (np->recverr) {
334                 u8 *payload = skb->data;
335                 if (!inet->hdrincl)
336                         payload += offset;
337                 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
338         }
339 
340         if (np->recverr || harderr) {
341                 sk->sk_err = err;
342                 sk->sk_error_report(sk);
343         }
344 }
345 
346 void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
347                 u8 type, u8 code, int inner_offset, __be32 info)
348 {
349         struct sock *sk;
350         int hash;
351         const struct in6_addr *saddr, *daddr;
352         struct net *net;
353 
354         hash = nexthdr & (RAW_HTABLE_SIZE - 1);
355 
356         read_lock(&raw_v6_hashinfo.lock);
357         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
358         if (sk != NULL) {
359                 /* Note: ipv6_hdr(skb) != skb->data */
360                 const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data;
361                 saddr = &ip6h->saddr;
362                 daddr = &ip6h->daddr;
363                 net = dev_net(skb->dev);
364 
365                 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
366                                                 IP6CB(skb)->iif))) {
367                         rawv6_err(sk, skb, NULL, type, code,
368                                         inner_offset, info);
369                         sk = sk_next(sk);
370                 }
371         }
372         read_unlock(&raw_v6_hashinfo.lock);
373 }
374 
375 static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb)
376 {
377         if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) &&
378             skb_checksum_complete(skb)) {
379                 atomic_inc(&sk->sk_drops);
380                 kfree_skb(skb);
381                 return NET_RX_DROP;
382         }
383 
384         /* Charge it to the socket. */
385         skb_dst_drop(skb);
386         if (sock_queue_rcv_skb(sk, skb) < 0) {
387                 kfree_skb(skb);
388                 return NET_RX_DROP;
389         }
390 
391         return 0;
392 }
393 
394 /*
395  *      This is next to useless...
396  *      if we demultiplex in network layer we don't need the extra call
397  *      just to queue the skb...
398  *      maybe we could have the network decide upon a hint if it
399  *      should call raw_rcv for demultiplexing
400  */
401 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
402 {
403         struct inet_sock *inet = inet_sk(sk);
404         struct raw6_sock *rp = raw6_sk(sk);
405 
406         if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
407                 atomic_inc(&sk->sk_drops);
408                 kfree_skb(skb);
409                 return NET_RX_DROP;
410         }
411 
412         if (!rp->checksum)
413                 skb->ip_summed = CHECKSUM_UNNECESSARY;
414 
415         if (skb->ip_summed == CHECKSUM_COMPLETE) {
416                 skb_postpull_rcsum(skb, skb_network_header(skb),
417                                    skb_network_header_len(skb));
418                 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
419                                      &ipv6_hdr(skb)->daddr,
420                                      skb->len, inet->inet_num, skb->csum))
421                         skb->ip_summed = CHECKSUM_UNNECESSARY;
422         }
423         if (!skb_csum_unnecessary(skb))
424                 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
425                                                          &ipv6_hdr(skb)->daddr,
426                                                          skb->len,
427                                                          inet->inet_num, 0));
428 
429         if (inet->hdrincl) {
430                 if (skb_checksum_complete(skb)) {
431                         atomic_inc(&sk->sk_drops);
432                         kfree_skb(skb);
433                         return NET_RX_DROP;
434                 }
435         }
436 
437         rawv6_rcv_skb(sk, skb);
438         return 0;
439 }
440 
441 
442 /*
443  *      This should be easy, if there is something there
444  *      we return it, otherwise we block.
445  */
446 
447 static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
448                   struct msghdr *msg, size_t len,
449                   int noblock, int flags, int *addr_len)
450 {
451         struct ipv6_pinfo *np = inet6_sk(sk);
452         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
453         struct sk_buff *skb;
454         size_t copied;
455         int err;
456 
457         if (flags & MSG_OOB)
458                 return -EOPNOTSUPP;
459 
460         if (flags & MSG_ERRQUEUE)
461                 return ipv6_recv_error(sk, msg, len, addr_len);
462 
463         if (np->rxpmtu && np->rxopt.bits.rxpmtu)
464                 return ipv6_recv_rxpmtu(sk, msg, len, addr_len);
465 
466         skb = skb_recv_datagram(sk, flags, noblock, &err);
467         if (!skb)
468                 goto out;
469         if (ccs_socket_post_recvmsg_permission(sk, skb, flags)) {
470                 err = -EAGAIN; /* Hope less harmful than -EPERM. */
471                 goto out;
472         }
473 
474         copied = skb->len;
475         if (copied > len) {
476                 copied = len;
477                 msg->msg_flags |= MSG_TRUNC;
478         }
479 
480         if (skb_csum_unnecessary(skb)) {
481                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
482         } else if (msg->msg_flags&MSG_TRUNC) {
483                 if (__skb_checksum_complete(skb))
484                         goto csum_copy_err;
485                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
486         } else {
487                 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
488                 if (err == -EINVAL)
489                         goto csum_copy_err;
490         }
491         if (err)
492                 goto out_free;
493 
494         /* Copy the address. */
495         if (sin6) {
496                 sin6->sin6_family = AF_INET6;
497                 sin6->sin6_port = 0;
498                 sin6->sin6_addr = ipv6_hdr(skb)->saddr;
499                 sin6->sin6_flowinfo = 0;
500                 sin6->sin6_scope_id = 0;
501                 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
502                         sin6->sin6_scope_id = IP6CB(skb)->iif;
503                 *addr_len = sizeof(*sin6);
504         }
505 
506         sock_recv_ts_and_drops(msg, sk, skb);
507 
508         if (np->rxopt.all)
509                 datagram_recv_ctl(sk, msg, skb);
510 
511         err = copied;
512         if (flags & MSG_TRUNC)
513                 err = skb->len;
514 
515 out_free:
516         skb_free_datagram(sk, skb);
517 out:
518         return err;
519 
520 csum_copy_err:
521         skb_kill_datagram(sk, skb, flags);
522 
523         /* Error for blocking case is chosen to masquerade
524            as some normal condition.
525          */
526         err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
527         goto out;
528 }
529 
530 static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
531                                      struct raw6_sock *rp)
532 {
533         struct sk_buff *skb;
534         int err = 0;
535         int offset;
536         int len;
537         int total_len;
538         __wsum tmp_csum;
539         __sum16 csum;
540 
541         if (!rp->checksum)
542                 goto send;
543 
544         if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
545                 goto out;
546 
547         offset = rp->offset;
548         total_len = inet_sk(sk)->cork.base.length;
549         if (offset >= total_len - 1) {
550                 err = -EINVAL;
551                 ip6_flush_pending_frames(sk);
552                 goto out;
553         }
554 
555         /* should be check HW csum miyazawa */
556         if (skb_queue_len(&sk->sk_write_queue) == 1) {
557                 /*
558                  * Only one fragment on the socket.
559                  */
560                 tmp_csum = skb->csum;
561         } else {
562                 struct sk_buff *csum_skb = NULL;
563                 tmp_csum = 0;
564 
565                 skb_queue_walk(&sk->sk_write_queue, skb) {
566                         tmp_csum = csum_add(tmp_csum, skb->csum);
567 
568                         if (csum_skb)
569                                 continue;
570 
571                         len = skb->len - skb_transport_offset(skb);
572                         if (offset >= len) {
573                                 offset -= len;
574                                 continue;
575                         }
576 
577                         csum_skb = skb;
578                 }
579 
580                 skb = csum_skb;
581         }
582 
583         offset += skb_transport_offset(skb);
584         if (skb_copy_bits(skb, offset, &csum, 2))
585                 BUG();
586 
587         /* in case cksum was not initialized */
588         if (unlikely(csum))
589                 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
590 
591         csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr,
592                                total_len, fl6->flowi6_proto, tmp_csum);
593 
594         if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP)
595                 csum = CSUM_MANGLED_0;
596 
597         if (skb_store_bits(skb, offset, &csum, 2))
598                 BUG();
599 
600 send:
601         err = ip6_push_pending_frames(sk);
602 out:
603         return err;
604 }
605 
606 static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
607                         struct flowi6 *fl6, struct dst_entry **dstp,
608                         unsigned int flags)
609 {
610         struct ipv6_pinfo *np = inet6_sk(sk);
611         struct ipv6hdr *iph;
612         struct sk_buff *skb;
613         int err;
614         struct rt6_info *rt = (struct rt6_info *)*dstp;
615         int hlen = LL_RESERVED_SPACE(rt->dst.dev);
616         int tlen = rt->dst.dev->needed_tailroom;
617 
618         if (length > rt->dst.dev->mtu) {
619                 ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu);
620                 return -EMSGSIZE;
621         }
622         if (flags&MSG_PROBE)
623                 goto out;
624 
625         skb = sock_alloc_send_skb(sk,
626                                   length + hlen + tlen + 15,
627                                   flags & MSG_DONTWAIT, &err);
628         if (skb == NULL)
629                 goto error;
630         skb_reserve(skb, hlen);
631 
632         skb->priority = sk->sk_priority;
633         skb->mark = sk->sk_mark;
634         skb_dst_set(skb, &rt->dst);
635         *dstp = NULL;
636 
637         skb_put(skb, length);
638         skb_reset_network_header(skb);
639         iph = ipv6_hdr(skb);
640 
641         skb->ip_summed = CHECKSUM_NONE;
642 
643         skb->transport_header = skb->network_header;
644         err = memcpy_fromiovecend((void *)iph, from, 0, length);
645         if (err)
646                 goto error_fault;
647 
648         IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
649         err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL,
650                       rt->dst.dev, dst_output);
651         if (err > 0)
652                 err = net_xmit_errno(err);
653         if (err)
654                 goto error;
655 out:
656         return 0;
657 
658 error_fault:
659         err = -EFAULT;
660         kfree_skb(skb);
661 error:
662         IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
663         if (err == -ENOBUFS && !np->recverr)
664                 err = 0;
665         return err;
666 }
667 
668 static int rawv6_probe_proto_opt(struct flowi6 *fl6, struct msghdr *msg)
669 {
670         struct iovec *iov;
671         u8 __user *type = NULL;
672         u8 __user *code = NULL;
673         u8 len = 0;
674         int probed = 0;
675         int i;
676 
677         if (!msg->msg_iov)
678                 return 0;
679 
680         for (i = 0; i < msg->msg_iovlen; i++) {
681                 iov = &msg->msg_iov[i];
682                 if (!iov)
683                         continue;
684 
685                 switch (fl6->flowi6_proto) {
686                 case IPPROTO_ICMPV6:
687                         /* check if one-byte field is readable or not. */
688                         if (iov->iov_base && iov->iov_len < 1)
689                                 break;
690 
691                         if (!type) {
692                                 type = iov->iov_base;
693                                 /* check if code field is readable or not. */
694                                 if (iov->iov_len > 1)
695                                         code = type + 1;
696                         } else if (!code)
697                                 code = iov->iov_base;
698 
699                         if (type && code) {
700                                 if (get_user(fl6->fl6_icmp_type, type) ||
701                                     get_user(fl6->fl6_icmp_code, code))
702                                         return -EFAULT;
703                                 probed = 1;
704                         }
705                         break;
706                 case IPPROTO_MH:
707                         if (iov->iov_base && iov->iov_len < 1)
708                                 break;
709                         /* check if type field is readable or not. */
710                         if (iov->iov_len > 2 - len) {
711                                 u8 __user *p = iov->iov_base;
712                                 if (get_user(fl6->fl6_mh_type, &p[2 - len]))
713                                         return -EFAULT;
714                                 probed = 1;
715                         } else
716                                 len += iov->iov_len;
717 
718                         break;
719                 default:
720                         probed = 1;
721                         break;
722                 }
723                 if (probed)
724                         break;
725         }
726         return 0;
727 }
728 
729 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
730                    struct msghdr *msg, size_t len)
731 {
732         struct ipv6_txoptions opt_space;
733         struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
734         struct in6_addr *daddr, *final_p, final;
735         struct inet_sock *inet = inet_sk(sk);
736         struct ipv6_pinfo *np = inet6_sk(sk);
737         struct raw6_sock *rp = raw6_sk(sk);
738         struct ipv6_txoptions *opt = NULL;
739         struct ip6_flowlabel *flowlabel = NULL;
740         struct dst_entry *dst = NULL;
741         struct flowi6 fl6;
742         int addr_len = msg->msg_namelen;
743         int hlimit = -1;
744         int tclass = -1;
745         int dontfrag = -1;
746         u16 proto;
747         int err;
748 
749         /* Rough check on arithmetic overflow,
750            better check is made in ip6_append_data().
751          */
752         if (len > INT_MAX)
753                 return -EMSGSIZE;
754 
755         /* Mirror BSD error message compatibility */
756         if (msg->msg_flags & MSG_OOB)
757                 return -EOPNOTSUPP;
758 
759         /*
760          *      Get and verify the address.
761          */
762         memset(&fl6, 0, sizeof(fl6));
763 
764         fl6.flowi6_mark = sk->sk_mark;
765 
766         if (sin6) {
767                 if (addr_len < SIN6_LEN_RFC2133)
768                         return -EINVAL;
769 
770                 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
771                         return -EAFNOSUPPORT;
772 
773                 /* port is the proto value [0..255] carried in nexthdr */
774                 proto = ntohs(sin6->sin6_port);
775 
776                 if (!proto)
777                         proto = inet->inet_num;
778                 else if (proto != inet->inet_num)
779                         return -EINVAL;
780 
781                 if (proto > 255)
782                         return -EINVAL;
783 
784                 daddr = &sin6->sin6_addr;
785                 if (np->sndflow) {
786                         fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
787                         if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
788                                 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
789                                 if (flowlabel == NULL)
790                                         return -EINVAL;
791                                 daddr = &flowlabel->dst;
792                         }
793                 }
794 
795                 /*
796                  * Otherwise it will be difficult to maintain
797                  * sk->sk_dst_cache.
798                  */
799                 if (sk->sk_state == TCP_ESTABLISHED &&
800                     ipv6_addr_equal(daddr, &np->daddr))
801                         daddr = &np->daddr;
802 
803                 if (addr_len >= sizeof(struct sockaddr_in6) &&
804                     sin6->sin6_scope_id &&
805                     ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
806                         fl6.flowi6_oif = sin6->sin6_scope_id;
807         } else {
808                 if (sk->sk_state != TCP_ESTABLISHED)
809                         return -EDESTADDRREQ;
810 
811                 proto = inet->inet_num;
812                 daddr = &np->daddr;
813                 fl6.flowlabel = np->flow_label;
814         }
815 
816         if (fl6.flowi6_oif == 0)
817                 fl6.flowi6_oif = sk->sk_bound_dev_if;
818 
819         if (msg->msg_controllen) {
820                 opt = &opt_space;
821                 memset(opt, 0, sizeof(struct ipv6_txoptions));
822                 opt->tot_len = sizeof(struct ipv6_txoptions);
823 
824                 err = datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt,
825                                         &hlimit, &tclass, &dontfrag);
826                 if (err < 0) {
827                         fl6_sock_release(flowlabel);
828                         return err;
829                 }
830                 if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
831                         flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
832                         if (flowlabel == NULL)
833                                 return -EINVAL;
834                 }
835                 if (!(opt->opt_nflen|opt->opt_flen))
836                         opt = NULL;
837         }
838         if (opt == NULL)
839                 opt = np->opt;
840         if (flowlabel)
841                 opt = fl6_merge_options(&opt_space, flowlabel, opt);
842         opt = ipv6_fixup_options(&opt_space, opt);
843 
844         fl6.flowi6_proto = proto;
845         err = rawv6_probe_proto_opt(&fl6, msg);
846         if (err)
847                 goto out;
848 
849         if (!ipv6_addr_any(daddr))
850                 fl6.daddr = *daddr;
851         else
852                 fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
853         if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
854                 fl6.saddr = np->saddr;
855 
856         final_p = fl6_update_dst(&fl6, opt, &final);
857 
858         if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
859                 fl6.flowi6_oif = np->mcast_oif;
860         else if (!fl6.flowi6_oif)
861                 fl6.flowi6_oif = np->ucast_oif;
862         security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
863 
864         dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true);
865         if (IS_ERR(dst)) {
866                 err = PTR_ERR(dst);
867                 goto out;
868         }
869         if (hlimit < 0) {
870                 if (ipv6_addr_is_multicast(&fl6.daddr))
871                         hlimit = np->mcast_hops;
872                 else
873                         hlimit = np->hop_limit;
874                 if (hlimit < 0)
875                         hlimit = ip6_dst_hoplimit(dst);
876         }
877 
878         if (tclass < 0)
879                 tclass = np->tclass;
880 
881         if (dontfrag < 0)
882                 dontfrag = np->dontfrag;
883 
884         if (msg->msg_flags&MSG_CONFIRM)
885                 goto do_confirm;
886 
887 back_from_confirm:
888         if (inet->hdrincl)
889                 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl6, &dst, msg->msg_flags);
890         else {
891                 lock_sock(sk);
892                 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
893                         len, 0, hlimit, tclass, opt, &fl6, (struct rt6_info*)dst,
894                         msg->msg_flags, dontfrag);
895 
896                 if (err)
897                         ip6_flush_pending_frames(sk);
898                 else if (!(msg->msg_flags & MSG_MORE))
899                         err = rawv6_push_pending_frames(sk, &fl6, rp);
900                 release_sock(sk);
901         }
902 done:
903         dst_release(dst);
904 out:
905         fl6_sock_release(flowlabel);
906         return err<0?err:len;
907 do_confirm:
908         dst_confirm(dst);
909         if (!(msg->msg_flags & MSG_PROBE) || len)
910                 goto back_from_confirm;
911         err = 0;
912         goto done;
913 }
914 
915 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
916                                char __user *optval, int optlen)
917 {
918         switch (optname) {
919         case ICMPV6_FILTER:
920                 if (optlen > sizeof(struct icmp6_filter))
921                         optlen = sizeof(struct icmp6_filter);
922                 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
923                         return -EFAULT;
924                 return 0;
925         default:
926                 return -ENOPROTOOPT;
927         }
928 
929         return 0;
930 }
931 
932 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
933                                char __user *optval, int __user *optlen)
934 {
935         int len;
936 
937         switch (optname) {
938         case ICMPV6_FILTER:
939                 if (get_user(len, optlen))
940                         return -EFAULT;
941                 if (len < 0)
942                         return -EINVAL;
943                 if (len > sizeof(struct icmp6_filter))
944                         len = sizeof(struct icmp6_filter);
945                 if (put_user(len, optlen))
946                         return -EFAULT;
947                 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
948                         return -EFAULT;
949                 return 0;
950         default:
951                 return -ENOPROTOOPT;
952         }
953 
954         return 0;
955 }
956 
957 
958 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
959                             char __user *optval, unsigned int optlen)
960 {
961         struct raw6_sock *rp = raw6_sk(sk);
962         int val;
963 
964         if (get_user(val, (int __user *)optval))
965                 return -EFAULT;
966 
967         switch (optname) {
968         case IPV6_CHECKSUM:
969                 if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
970                     level == IPPROTO_IPV6) {
971                         /*
972                          * RFC3542 tells that IPV6_CHECKSUM socket
973                          * option in the IPPROTO_IPV6 level is not
974                          * allowed on ICMPv6 sockets.
975                          * If you want to set it, use IPPROTO_RAW
976                          * level IPV6_CHECKSUM socket option
977                          * (Linux extension).
978                          */
979                         return -EINVAL;
980                 }
981 
982                 /* You may get strange result with a positive odd offset;
983                    RFC2292bis agrees with me. */
984                 if (val > 0 && (val&1))
985                         return -EINVAL;
986                 if (val < 0) {
987                         rp->checksum = 0;
988                 } else {
989                         rp->checksum = 1;
990                         rp->offset = val;
991                 }
992 
993                 return 0;
994 
995         default:
996                 return -ENOPROTOOPT;
997         }
998 }
999 
1000 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1001                           char __user *optval, unsigned int optlen)
1002 {
1003         switch (level) {
1004         case SOL_RAW:
1005                 break;
1006 
1007         case SOL_ICMPV6:
1008                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1009                         return -EOPNOTSUPP;
1010                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1011         case SOL_IPV6:
1012                 if (optname == IPV6_CHECKSUM)
1013                         break;
1014         default:
1015                 return ipv6_setsockopt(sk, level, optname, optval, optlen);
1016         }
1017 
1018         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1019 }
1020 
1021 #ifdef CONFIG_COMPAT
1022 static int compat_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         case SOL_ICMPV6:
1029                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1030                         return -EOPNOTSUPP;
1031                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1032         case SOL_IPV6:
1033                 if (optname == IPV6_CHECKSUM)
1034                         break;
1035         default:
1036                 return compat_ipv6_setsockopt(sk, level, optname,
1037                                               optval, optlen);
1038         }
1039         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1040 }
1041 #endif
1042 
1043 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1044                             char __user *optval, int __user *optlen)
1045 {
1046         struct raw6_sock *rp = raw6_sk(sk);
1047         int val, len;
1048 
1049         if (get_user(len,optlen))
1050                 return -EFAULT;
1051 
1052         switch (optname) {
1053         case IPV6_CHECKSUM:
1054                 /*
1055                  * We allow getsockopt() for IPPROTO_IPV6-level
1056                  * IPV6_CHECKSUM socket option on ICMPv6 sockets
1057                  * since RFC3542 is silent about it.
1058                  */
1059                 if (rp->checksum == 0)
1060                         val = -1;
1061                 else
1062                         val = rp->offset;
1063                 break;
1064 
1065         default:
1066                 return -ENOPROTOOPT;
1067         }
1068 
1069         len = min_t(unsigned int, sizeof(int), len);
1070 
1071         if (put_user(len, optlen))
1072                 return -EFAULT;
1073         if (copy_to_user(optval,&val,len))
1074                 return -EFAULT;
1075         return 0;
1076 }
1077 
1078 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1079                           char __user *optval, int __user *optlen)
1080 {
1081         switch (level) {
1082         case SOL_RAW:
1083                 break;
1084 
1085         case SOL_ICMPV6:
1086                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1087                         return -EOPNOTSUPP;
1088                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1089         case SOL_IPV6:
1090                 if (optname == IPV6_CHECKSUM)
1091                         break;
1092         default:
1093                 return ipv6_getsockopt(sk, level, optname, optval, optlen);
1094         }
1095 
1096         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1097 }
1098 
1099 #ifdef CONFIG_COMPAT
1100 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1101                                    char __user *optval, int __user *optlen)
1102 {
1103         switch (level) {
1104         case SOL_RAW:
1105                 break;
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                         break;
1113         default:
1114                 return compat_ipv6_getsockopt(sk, level, optname,
1115                                               optval, optlen);
1116         }
1117         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1118 }
1119 #endif
1120 
1121 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1122 {
1123         switch (cmd) {
1124         case SIOCOUTQ: {
1125                 int amount = sk_wmem_alloc_get(sk);
1126 
1127                 return put_user(amount, (int __user *)arg);
1128         }
1129         case SIOCINQ: {
1130                 struct sk_buff *skb;
1131                 int amount = 0;
1132 
1133                 spin_lock_bh(&sk->sk_receive_queue.lock);
1134                 skb = skb_peek(&sk->sk_receive_queue);
1135                 if (skb != NULL)
1136                         amount = skb->tail - skb->transport_header;
1137                 spin_unlock_bh(&sk->sk_receive_queue.lock);
1138                 return put_user(amount, (int __user *)arg);
1139         }
1140 
1141         default:
1142 #ifdef CONFIG_IPV6_MROUTE
1143                 return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1144 #else
1145                 return -ENOIOCTLCMD;
1146 #endif
1147         }
1148 }
1149 
1150 #ifdef CONFIG_COMPAT
1151 static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
1152 {
1153         switch (cmd) {
1154         case SIOCOUTQ:
1155         case SIOCINQ:
1156                 return -ENOIOCTLCMD;
1157         default:
1158 #ifdef CONFIG_IPV6_MROUTE
1159                 return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
1160 #else
1161                 return -ENOIOCTLCMD;
1162 #endif
1163         }
1164 }
1165 #endif
1166 
1167 static void rawv6_close(struct sock *sk, long timeout)
1168 {
1169         if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1170                 ip6_ra_control(sk, -1);
1171         ip6mr_sk_done(sk);
1172         sk_common_release(sk);
1173 }
1174 
1175 static void raw6_destroy(struct sock *sk)
1176 {
1177         lock_sock(sk);
1178         ip6_flush_pending_frames(sk);
1179         release_sock(sk);
1180 
1181         inet6_destroy_sock(sk);
1182 }
1183 
1184 static int rawv6_init_sk(struct sock *sk)
1185 {
1186         struct raw6_sock *rp = raw6_sk(sk);
1187 
1188         switch (inet_sk(sk)->inet_num) {
1189         case IPPROTO_ICMPV6:
1190                 rp->checksum = 1;
1191                 rp->offset   = 2;
1192                 break;
1193         case IPPROTO_MH:
1194                 rp->checksum = 1;
1195                 rp->offset   = 4;
1196                 break;
1197         default:
1198                 break;
1199         }
1200         return 0;
1201 }
1202 
1203 struct proto rawv6_prot = {
1204         .name              = "RAWv6",
1205         .owner             = THIS_MODULE,
1206         .close             = rawv6_close,
1207         .destroy           = raw6_destroy,
1208         .connect           = ip6_datagram_connect,
1209         .disconnect        = udp_disconnect,
1210         .ioctl             = rawv6_ioctl,
1211         .init              = rawv6_init_sk,
1212         .setsockopt        = rawv6_setsockopt,
1213         .getsockopt        = rawv6_getsockopt,
1214         .sendmsg           = rawv6_sendmsg,
1215         .recvmsg           = rawv6_recvmsg,
1216         .bind              = rawv6_bind,
1217         .backlog_rcv       = rawv6_rcv_skb,
1218         .hash              = raw_hash_sk,
1219         .unhash            = raw_unhash_sk,
1220         .obj_size          = sizeof(struct raw6_sock),
1221         .h.raw_hash        = &raw_v6_hashinfo,
1222 #ifdef CONFIG_COMPAT
1223         .compat_setsockopt = compat_rawv6_setsockopt,
1224         .compat_getsockopt = compat_rawv6_getsockopt,
1225         .compat_ioctl      = compat_rawv6_ioctl,
1226 #endif
1227 };
1228 
1229 #ifdef CONFIG_PROC_FS
1230 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1231 {
1232         struct ipv6_pinfo *np = inet6_sk(sp);
1233         const struct in6_addr *dest, *src;
1234         __u16 destp, srcp;
1235 
1236         dest  = &np->daddr;
1237         src   = &np->rcv_saddr;
1238         destp = 0;
1239         srcp  = inet_sk(sp)->inet_num;
1240         seq_printf(seq,
1241                    "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1242                    "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d\n",
1243                    i,
1244                    src->s6_addr32[0], src->s6_addr32[1],
1245                    src->s6_addr32[2], src->s6_addr32[3], srcp,
1246                    dest->s6_addr32[0], dest->s6_addr32[1],
1247                    dest->s6_addr32[2], dest->s6_addr32[3], destp,
1248                    sp->sk_state,
1249                    sk_wmem_alloc_get(sp),
1250                    sk_rmem_alloc_get(sp),
1251                    0, 0L, 0,
1252                    sock_i_uid(sp), 0,
1253                    sock_i_ino(sp),
1254                    atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1255 }
1256 
1257 static int raw6_seq_show(struct seq_file *seq, void *v)
1258 {
1259         if (v == SEQ_START_TOKEN)
1260                 seq_printf(seq,
1261                            "  sl  "
1262                            "local_address                         "
1263                            "remote_address                        "
1264                            "st tx_queue rx_queue tr tm->when retrnsmt"
1265                            "   uid  timeout inode ref pointer drops\n");
1266         else
1267                 raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1268         return 0;
1269 }
1270 
1271 static const struct seq_operations raw6_seq_ops = {
1272         .start =        raw_seq_start,
1273         .next =         raw_seq_next,
1274         .stop =         raw_seq_stop,
1275         .show =         raw6_seq_show,
1276 };
1277 
1278 static int raw6_seq_open(struct inode *inode, struct file *file)
1279 {
1280         return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1281 }
1282 
1283 static const struct file_operations raw6_seq_fops = {
1284         .owner =        THIS_MODULE,
1285         .open =         raw6_seq_open,
1286         .read =         seq_read,
1287         .llseek =       seq_lseek,
1288         .release =      seq_release_net,
1289 };
1290 
1291 static int __net_init raw6_init_net(struct net *net)
1292 {
1293         if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops))
1294                 return -ENOMEM;
1295 
1296         return 0;
1297 }
1298 
1299 static void __net_exit raw6_exit_net(struct net *net)
1300 {
1301         proc_net_remove(net, "raw6");
1302 }
1303 
1304 static struct pernet_operations raw6_net_ops = {
1305         .init = raw6_init_net,
1306         .exit = raw6_exit_net,
1307 };
1308 
1309 int __init raw6_proc_init(void)
1310 {
1311         return register_pernet_subsys(&raw6_net_ops);
1312 }
1313 
1314 void raw6_proc_exit(void)
1315 {
1316         unregister_pernet_subsys(&raw6_net_ops);
1317 }
1318 #endif  /* CONFIG_PROC_FS */
1319 
1320 /* Same as inet6_dgram_ops, sans udp_poll.  */
1321 static const struct proto_ops inet6_sockraw_ops = {
1322         .family            = PF_INET6,
1323         .owner             = THIS_MODULE,
1324         .release           = inet6_release,
1325         .bind              = inet6_bind,
1326         .connect           = inet_dgram_connect,        /* ok           */
1327         .socketpair        = sock_no_socketpair,        /* a do nothing */
1328         .accept            = sock_no_accept,            /* a do nothing */
1329         .getname           = inet6_getname,
1330         .poll              = datagram_poll,             /* ok           */
1331         .ioctl             = inet6_ioctl,               /* must change  */
1332         .listen            = sock_no_listen,            /* ok           */
1333         .shutdown          = inet_shutdown,             /* ok           */
1334         .setsockopt        = sock_common_setsockopt,    /* ok           */
1335         .getsockopt        = sock_common_getsockopt,    /* ok           */
1336         .sendmsg           = inet_sendmsg,              /* ok           */
1337         .recvmsg           = sock_common_recvmsg,       /* ok           */
1338         .mmap              = sock_no_mmap,
1339         .sendpage          = sock_no_sendpage,
1340 #ifdef CONFIG_COMPAT
1341         .compat_setsockopt = compat_sock_common_setsockopt,
1342         .compat_getsockopt = compat_sock_common_getsockopt,
1343 #endif
1344 };
1345 
1346 static struct inet_protosw rawv6_protosw = {
1347         .type           = SOCK_RAW,
1348         .protocol       = IPPROTO_IP,   /* wild card */
1349         .prot           = &rawv6_prot,
1350         .ops            = &inet6_sockraw_ops,
1351         .no_check       = UDP_CSUM_DEFAULT,
1352         .flags          = INET_PROTOSW_REUSE,
1353 };
1354 
1355 int __init rawv6_init(void)
1356 {
1357         int ret;
1358 
1359         ret = inet6_register_protosw(&rawv6_protosw);
1360         if (ret)
1361                 goto out;
1362 out:
1363         return ret;
1364 }
1365 
1366 void rawv6_exit(void)
1367 {
1368         inet6_unregister_protosw(&rawv6_protosw);
1369 }
1370 

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