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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 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 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         bool 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 IS_ENABLED(CONFIG_IPV6_MIP6)
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 bool 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         bool delivered = false;
161         __u8 hash;
162         struct net *net;
163 
164         saddr = &ipv6_hdr(skb)->saddr;
165         daddr = saddr + 1;
166 
167         hash = nexthdr & (RAW_HTABLE_SIZE - 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 = true;
182                 switch (nexthdr) {
183                 case IPPROTO_ICMPV6:
184                         filtered = icmpv6_filter(sk, skb);
185                         break;
186 
187 #if IS_ENABLED(CONFIG_IPV6_MIP6)
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 bool 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 & (RAW_HTABLE_SIZE - 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                 ip6_sk_update_pmtu(skb, sk, info);
332                 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
333         }
334         if (type == NDISC_REDIRECT)
335                 ip6_sk_redirect(skb, sk);
336         if (np->recverr) {
337                 u8 *payload = skb->data;
338                 if (!inet->hdrincl)
339                         payload += offset;
340                 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
341         }
342 
343         if (np->recverr || harderr) {
344                 sk->sk_err = err;
345                 sk->sk_error_report(sk);
346         }
347 }
348 
349 void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
350                 u8 type, u8 code, int inner_offset, __be32 info)
351 {
352         struct sock *sk;
353         int hash;
354         const struct in6_addr *saddr, *daddr;
355         struct net *net;
356 
357         hash = nexthdr & (RAW_HTABLE_SIZE - 1);
358 
359         read_lock(&raw_v6_hashinfo.lock);
360         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
361         if (sk != NULL) {
362                 /* Note: ipv6_hdr(skb) != skb->data */
363                 const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data;
364                 saddr = &ip6h->saddr;
365                 daddr = &ip6h->daddr;
366                 net = dev_net(skb->dev);
367 
368                 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
369                                                 IP6CB(skb)->iif))) {
370                         rawv6_err(sk, skb, NULL, type, code,
371                                         inner_offset, info);
372                         sk = sk_next(sk);
373                 }
374         }
375         read_unlock(&raw_v6_hashinfo.lock);
376 }
377 
378 static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb)
379 {
380         if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) &&
381             skb_checksum_complete(skb)) {
382                 atomic_inc(&sk->sk_drops);
383                 kfree_skb(skb);
384                 return NET_RX_DROP;
385         }
386 
387         /* Charge it to the socket. */
388         skb_dst_drop(skb);
389         if (sock_queue_rcv_skb(sk, skb) < 0) {
390                 kfree_skb(skb);
391                 return NET_RX_DROP;
392         }
393 
394         return 0;
395 }
396 
397 /*
398  *      This is next to useless...
399  *      if we demultiplex in network layer we don't need the extra call
400  *      just to queue the skb...
401  *      maybe we could have the network decide upon a hint if it
402  *      should call raw_rcv for demultiplexing
403  */
404 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
405 {
406         struct inet_sock *inet = inet_sk(sk);
407         struct raw6_sock *rp = raw6_sk(sk);
408 
409         if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
410                 atomic_inc(&sk->sk_drops);
411                 kfree_skb(skb);
412                 return NET_RX_DROP;
413         }
414 
415         if (!rp->checksum)
416                 skb->ip_summed = CHECKSUM_UNNECESSARY;
417 
418         if (skb->ip_summed == CHECKSUM_COMPLETE) {
419                 skb_postpull_rcsum(skb, skb_network_header(skb),
420                                    skb_network_header_len(skb));
421                 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
422                                      &ipv6_hdr(skb)->daddr,
423                                      skb->len, inet->inet_num, skb->csum))
424                         skb->ip_summed = CHECKSUM_UNNECESSARY;
425         }
426         if (!skb_csum_unnecessary(skb))
427                 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
428                                                          &ipv6_hdr(skb)->daddr,
429                                                          skb->len,
430                                                          inet->inet_num, 0));
431 
432         if (inet->hdrincl) {
433                 if (skb_checksum_complete(skb)) {
434                         atomic_inc(&sk->sk_drops);
435                         kfree_skb(skb);
436                         return NET_RX_DROP;
437                 }
438         }
439 
440         rawv6_rcv_skb(sk, skb);
441         return 0;
442 }
443 
444 
445 /*
446  *      This should be easy, if there is something there
447  *      we return it, otherwise we block.
448  */
449 
450 static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
451                   struct msghdr *msg, size_t len,
452                   int noblock, int flags, int *addr_len)
453 {
454         struct ipv6_pinfo *np = inet6_sk(sk);
455         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
456         struct sk_buff *skb;
457         size_t copied;
458         int err;
459 
460         if (flags & MSG_OOB)
461                 return -EOPNOTSUPP;
462 
463         if (addr_len)
464                 *addr_len=sizeof(*sin6);
465 
466         if (flags & MSG_ERRQUEUE)
467                 return ipv6_recv_error(sk, msg, len);
468 
469         if (np->rxpmtu && np->rxopt.bits.rxpmtu)
470                 return ipv6_recv_rxpmtu(sk, msg, len);
471 
472         skb = skb_recv_datagram(sk, flags, noblock, &err);
473         if (!skb)
474                 goto out;
475         if (ccs_socket_post_recvmsg_permission(sk, skb, flags)) {
476                 err = -EAGAIN; /* Hope less harmful than -EPERM. */
477                 goto out;
478         }
479 
480         copied = skb->len;
481         if (copied > len) {
482                 copied = len;
483                 msg->msg_flags |= MSG_TRUNC;
484         }
485 
486         if (skb_csum_unnecessary(skb)) {
487                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
488         } else if (msg->msg_flags&MSG_TRUNC) {
489                 if (__skb_checksum_complete(skb))
490                         goto csum_copy_err;
491                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
492         } else {
493                 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
494                 if (err == -EINVAL)
495                         goto csum_copy_err;
496         }
497         if (err)
498                 goto out_free;
499 
500         /* Copy the address. */
501         if (sin6) {
502                 sin6->sin6_family = AF_INET6;
503                 sin6->sin6_port = 0;
504                 sin6->sin6_addr = ipv6_hdr(skb)->saddr;
505                 sin6->sin6_flowinfo = 0;
506                 sin6->sin6_scope_id = 0;
507                 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
508                         sin6->sin6_scope_id = IP6CB(skb)->iif;
509         }
510 
511         sock_recv_ts_and_drops(msg, sk, skb);
512 
513         if (np->rxopt.all)
514                 ip6_datagram_recv_ctl(sk, msg, skb);
515 
516         err = copied;
517         if (flags & MSG_TRUNC)
518                 err = skb->len;
519 
520 out_free:
521         skb_free_datagram(sk, skb);
522 out:
523         return err;
524 
525 csum_copy_err:
526         skb_kill_datagram(sk, skb, flags);
527 
528         /* Error for blocking case is chosen to masquerade
529            as some normal condition.
530          */
531         err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
532         goto out;
533 }
534 
535 static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
536                                      struct raw6_sock *rp)
537 {
538         struct sk_buff *skb;
539         int err = 0;
540         int offset;
541         int len;
542         int total_len;
543         __wsum tmp_csum;
544         __sum16 csum;
545 
546         if (!rp->checksum)
547                 goto send;
548 
549         if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
550                 goto out;
551 
552         offset = rp->offset;
553         total_len = inet_sk(sk)->cork.base.length;
554         if (offset >= total_len - 1) {
555                 err = -EINVAL;
556                 ip6_flush_pending_frames(sk);
557                 goto out;
558         }
559 
560         /* should be check HW csum miyazawa */
561         if (skb_queue_len(&sk->sk_write_queue) == 1) {
562                 /*
563                  * Only one fragment on the socket.
564                  */
565                 tmp_csum = skb->csum;
566         } else {
567                 struct sk_buff *csum_skb = NULL;
568                 tmp_csum = 0;
569 
570                 skb_queue_walk(&sk->sk_write_queue, skb) {
571                         tmp_csum = csum_add(tmp_csum, skb->csum);
572 
573                         if (csum_skb)
574                                 continue;
575 
576                         len = skb->len - skb_transport_offset(skb);
577                         if (offset >= len) {
578                                 offset -= len;
579                                 continue;
580                         }
581 
582                         csum_skb = skb;
583                 }
584 
585                 skb = csum_skb;
586         }
587 
588         offset += skb_transport_offset(skb);
589         if (skb_copy_bits(skb, offset, &csum, 2))
590                 BUG();
591 
592         /* in case cksum was not initialized */
593         if (unlikely(csum))
594                 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
595 
596         csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr,
597                                total_len, fl6->flowi6_proto, tmp_csum);
598 
599         if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP)
600                 csum = CSUM_MANGLED_0;
601 
602         if (skb_store_bits(skb, offset, &csum, 2))
603                 BUG();
604 
605 send:
606         err = ip6_push_pending_frames(sk);
607 out:
608         return err;
609 }
610 
611 static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
612                         struct flowi6 *fl6, struct dst_entry **dstp,
613                         unsigned int flags)
614 {
615         struct ipv6_pinfo *np = inet6_sk(sk);
616         struct ipv6hdr *iph;
617         struct sk_buff *skb;
618         int err;
619         struct rt6_info *rt = (struct rt6_info *)*dstp;
620         int hlen = LL_RESERVED_SPACE(rt->dst.dev);
621         int tlen = rt->dst.dev->needed_tailroom;
622 
623         if (length > rt->dst.dev->mtu) {
624                 ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu);
625                 return -EMSGSIZE;
626         }
627         if (flags&MSG_PROBE)
628                 goto out;
629 
630         skb = sock_alloc_send_skb(sk,
631                                   length + hlen + tlen + 15,
632                                   flags & MSG_DONTWAIT, &err);
633         if (skb == NULL)
634                 goto error;
635         skb_reserve(skb, hlen);
636 
637         skb->priority = sk->sk_priority;
638         skb->mark = sk->sk_mark;
639         skb_dst_set(skb, &rt->dst);
640         *dstp = NULL;
641 
642         skb_put(skb, length);
643         skb_reset_network_header(skb);
644         iph = ipv6_hdr(skb);
645 
646         skb->ip_summed = CHECKSUM_NONE;
647 
648         skb->transport_header = skb->network_header;
649         err = memcpy_fromiovecend((void *)iph, from, 0, length);
650         if (err)
651                 goto error_fault;
652 
653         IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
654         err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL,
655                       rt->dst.dev, dst_output);
656         if (err > 0)
657                 err = net_xmit_errno(err);
658         if (err)
659                 goto error;
660 out:
661         return 0;
662 
663 error_fault:
664         err = -EFAULT;
665         kfree_skb(skb);
666 error:
667         IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
668         if (err == -ENOBUFS && !np->recverr)
669                 err = 0;
670         return err;
671 }
672 
673 static int rawv6_probe_proto_opt(struct flowi6 *fl6, struct msghdr *msg)
674 {
675         struct iovec *iov;
676         u8 __user *type = NULL;
677         u8 __user *code = NULL;
678         u8 len = 0;
679         int probed = 0;
680         int i;
681 
682         if (!msg->msg_iov)
683                 return 0;
684 
685         for (i = 0; i < msg->msg_iovlen; i++) {
686                 iov = &msg->msg_iov[i];
687                 if (!iov)
688                         continue;
689 
690                 switch (fl6->flowi6_proto) {
691                 case IPPROTO_ICMPV6:
692                         /* check if one-byte field is readable or not. */
693                         if (iov->iov_base && iov->iov_len < 1)
694                                 break;
695 
696                         if (!type) {
697                                 type = iov->iov_base;
698                                 /* check if code field is readable or not. */
699                                 if (iov->iov_len > 1)
700                                         code = type + 1;
701                         } else if (!code)
702                                 code = iov->iov_base;
703 
704                         if (type && code) {
705                                 if (get_user(fl6->fl6_icmp_type, type) ||
706                                     get_user(fl6->fl6_icmp_code, code))
707                                         return -EFAULT;
708                                 probed = 1;
709                         }
710                         break;
711                 case IPPROTO_MH:
712                         if (iov->iov_base && iov->iov_len < 1)
713                                 break;
714                         /* check if type field is readable or not. */
715                         if (iov->iov_len > 2 - len) {
716                                 u8 __user *p = iov->iov_base;
717                                 if (get_user(fl6->fl6_mh_type, &p[2 - len]))
718                                         return -EFAULT;
719                                 probed = 1;
720                         } else
721                                 len += iov->iov_len;
722 
723                         break;
724                 default:
725                         probed = 1;
726                         break;
727                 }
728                 if (probed)
729                         break;
730         }
731         return 0;
732 }
733 
734 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
735                    struct msghdr *msg, size_t len)
736 {
737         struct ipv6_txoptions opt_space;
738         struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
739         struct in6_addr *daddr, *final_p, final;
740         struct inet_sock *inet = inet_sk(sk);
741         struct ipv6_pinfo *np = inet6_sk(sk);
742         struct raw6_sock *rp = raw6_sk(sk);
743         struct ipv6_txoptions *opt = NULL;
744         struct ip6_flowlabel *flowlabel = NULL;
745         struct dst_entry *dst = NULL;
746         struct flowi6 fl6;
747         int addr_len = msg->msg_namelen;
748         int hlimit = -1;
749         int tclass = -1;
750         int dontfrag = -1;
751         u16 proto;
752         int err;
753 
754         /* Rough check on arithmetic overflow,
755            better check is made in ip6_append_data().
756          */
757         if (len > INT_MAX)
758                 return -EMSGSIZE;
759 
760         /* Mirror BSD error message compatibility */
761         if (msg->msg_flags & MSG_OOB)
762                 return -EOPNOTSUPP;
763 
764         /*
765          *      Get and verify the address.
766          */
767         memset(&fl6, 0, sizeof(fl6));
768 
769         fl6.flowi6_mark = sk->sk_mark;
770 
771         if (sin6) {
772                 if (addr_len < SIN6_LEN_RFC2133)
773                         return -EINVAL;
774 
775                 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
776                         return -EAFNOSUPPORT;
777 
778                 /* port is the proto value [0..255] carried in nexthdr */
779                 proto = ntohs(sin6->sin6_port);
780 
781                 if (!proto)
782                         proto = inet->inet_num;
783                 else if (proto != inet->inet_num)
784                         return -EINVAL;
785 
786                 if (proto > 255)
787                         return -EINVAL;
788 
789                 daddr = &sin6->sin6_addr;
790                 if (np->sndflow) {
791                         fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
792                         if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
793                                 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
794                                 if (flowlabel == NULL)
795                                         return -EINVAL;
796                                 daddr = &flowlabel->dst;
797                         }
798                 }
799 
800                 /*
801                  * Otherwise it will be difficult to maintain
802                  * sk->sk_dst_cache.
803                  */
804                 if (sk->sk_state == TCP_ESTABLISHED &&
805                     ipv6_addr_equal(daddr, &np->daddr))
806                         daddr = &np->daddr;
807 
808                 if (addr_len >= sizeof(struct sockaddr_in6) &&
809                     sin6->sin6_scope_id &&
810                     ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
811                         fl6.flowi6_oif = sin6->sin6_scope_id;
812         } else {
813                 if (sk->sk_state != TCP_ESTABLISHED)
814                         return -EDESTADDRREQ;
815 
816                 proto = inet->inet_num;
817                 daddr = &np->daddr;
818                 fl6.flowlabel = np->flow_label;
819         }
820 
821         if (fl6.flowi6_oif == 0)
822                 fl6.flowi6_oif = sk->sk_bound_dev_if;
823 
824         if (msg->msg_controllen) {
825                 opt = &opt_space;
826                 memset(opt, 0, sizeof(struct ipv6_txoptions));
827                 opt->tot_len = sizeof(struct ipv6_txoptions);
828 
829                 err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt,
830                                             &hlimit, &tclass, &dontfrag);
831                 if (err < 0) {
832                         fl6_sock_release(flowlabel);
833                         return err;
834                 }
835                 if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
836                         flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
837                         if (flowlabel == NULL)
838                                 return -EINVAL;
839                 }
840                 if (!(opt->opt_nflen|opt->opt_flen))
841                         opt = NULL;
842         }
843         if (opt == NULL)
844                 opt = np->opt;
845         if (flowlabel)
846                 opt = fl6_merge_options(&opt_space, flowlabel, opt);
847         opt = ipv6_fixup_options(&opt_space, opt);
848 
849         fl6.flowi6_proto = proto;
850         err = rawv6_probe_proto_opt(&fl6, msg);
851         if (err)
852                 goto out;
853 
854         if (!ipv6_addr_any(daddr))
855                 fl6.daddr = *daddr;
856         else
857                 fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
858         if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
859                 fl6.saddr = np->saddr;
860 
861         final_p = fl6_update_dst(&fl6, opt, &final);
862 
863         if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
864                 fl6.flowi6_oif = np->mcast_oif;
865         else if (!fl6.flowi6_oif)
866                 fl6.flowi6_oif = np->ucast_oif;
867         security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
868 
869         dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true);
870         if (IS_ERR(dst)) {
871                 err = PTR_ERR(dst);
872                 goto out;
873         }
874         if (hlimit < 0) {
875                 if (ipv6_addr_is_multicast(&fl6.daddr))
876                         hlimit = np->mcast_hops;
877                 else
878                         hlimit = np->hop_limit;
879                 if (hlimit < 0)
880                         hlimit = ip6_dst_hoplimit(dst);
881         }
882 
883         if (tclass < 0)
884                 tclass = np->tclass;
885 
886         if (dontfrag < 0)
887                 dontfrag = np->dontfrag;
888 
889         if (msg->msg_flags&MSG_CONFIRM)
890                 goto do_confirm;
891 
892 back_from_confirm:
893         if (inet->hdrincl)
894                 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl6, &dst, msg->msg_flags);
895         else {
896                 lock_sock(sk);
897                 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
898                         len, 0, hlimit, tclass, opt, &fl6, (struct rt6_info*)dst,
899                         msg->msg_flags, dontfrag);
900 
901                 if (err)
902                         ip6_flush_pending_frames(sk);
903                 else if (!(msg->msg_flags & MSG_MORE))
904                         err = rawv6_push_pending_frames(sk, &fl6, rp);
905                 release_sock(sk);
906         }
907 done:
908         dst_release(dst);
909 out:
910         fl6_sock_release(flowlabel);
911         return err<0?err:len;
912 do_confirm:
913         dst_confirm(dst);
914         if (!(msg->msg_flags & MSG_PROBE) || len)
915                 goto back_from_confirm;
916         err = 0;
917         goto done;
918 }
919 
920 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
921                                char __user *optval, int optlen)
922 {
923         switch (optname) {
924         case ICMPV6_FILTER:
925                 if (optlen > sizeof(struct icmp6_filter))
926                         optlen = sizeof(struct icmp6_filter);
927                 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
928                         return -EFAULT;
929                 return 0;
930         default:
931                 return -ENOPROTOOPT;
932         }
933 
934         return 0;
935 }
936 
937 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
938                                char __user *optval, int __user *optlen)
939 {
940         int len;
941 
942         switch (optname) {
943         case ICMPV6_FILTER:
944                 if (get_user(len, optlen))
945                         return -EFAULT;
946                 if (len < 0)
947                         return -EINVAL;
948                 if (len > sizeof(struct icmp6_filter))
949                         len = sizeof(struct icmp6_filter);
950                 if (put_user(len, optlen))
951                         return -EFAULT;
952                 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
953                         return -EFAULT;
954                 return 0;
955         default:
956                 return -ENOPROTOOPT;
957         }
958 
959         return 0;
960 }
961 
962 
963 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
964                             char __user *optval, unsigned int optlen)
965 {
966         struct raw6_sock *rp = raw6_sk(sk);
967         int val;
968 
969         if (get_user(val, (int __user *)optval))
970                 return -EFAULT;
971 
972         switch (optname) {
973         case IPV6_CHECKSUM:
974                 if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
975                     level == IPPROTO_IPV6) {
976                         /*
977                          * RFC3542 tells that IPV6_CHECKSUM socket
978                          * option in the IPPROTO_IPV6 level is not
979                          * allowed on ICMPv6 sockets.
980                          * If you want to set it, use IPPROTO_RAW
981                          * level IPV6_CHECKSUM socket option
982                          * (Linux extension).
983                          */
984                         return -EINVAL;
985                 }
986 
987                 /* You may get strange result with a positive odd offset;
988                    RFC2292bis agrees with me. */
989                 if (val > 0 && (val&1))
990                         return -EINVAL;
991                 if (val < 0) {
992                         rp->checksum = 0;
993                 } else {
994                         rp->checksum = 1;
995                         rp->offset = val;
996                 }
997 
998                 return 0;
999 
1000         default:
1001                 return -ENOPROTOOPT;
1002         }
1003 }
1004 
1005 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1006                           char __user *optval, unsigned int optlen)
1007 {
1008         switch (level) {
1009         case SOL_RAW:
1010                 break;
1011 
1012         case SOL_ICMPV6:
1013                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1014                         return -EOPNOTSUPP;
1015                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1016         case SOL_IPV6:
1017                 if (optname == IPV6_CHECKSUM)
1018                         break;
1019         default:
1020                 return ipv6_setsockopt(sk, level, optname, optval, optlen);
1021         }
1022 
1023         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1024 }
1025 
1026 #ifdef CONFIG_COMPAT
1027 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1028                                    char __user *optval, unsigned int optlen)
1029 {
1030         switch (level) {
1031         case SOL_RAW:
1032                 break;
1033         case SOL_ICMPV6:
1034                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1035                         return -EOPNOTSUPP;
1036                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1037         case SOL_IPV6:
1038                 if (optname == IPV6_CHECKSUM)
1039                         break;
1040         default:
1041                 return compat_ipv6_setsockopt(sk, level, optname,
1042                                               optval, optlen);
1043         }
1044         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1045 }
1046 #endif
1047 
1048 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1049                             char __user *optval, int __user *optlen)
1050 {
1051         struct raw6_sock *rp = raw6_sk(sk);
1052         int val, len;
1053 
1054         if (get_user(len,optlen))
1055                 return -EFAULT;
1056 
1057         switch (optname) {
1058         case IPV6_CHECKSUM:
1059                 /*
1060                  * We allow getsockopt() for IPPROTO_IPV6-level
1061                  * IPV6_CHECKSUM socket option on ICMPv6 sockets
1062                  * since RFC3542 is silent about it.
1063                  */
1064                 if (rp->checksum == 0)
1065                         val = -1;
1066                 else
1067                         val = rp->offset;
1068                 break;
1069 
1070         default:
1071                 return -ENOPROTOOPT;
1072         }
1073 
1074         len = min_t(unsigned int, sizeof(int), len);
1075 
1076         if (put_user(len, optlen))
1077                 return -EFAULT;
1078         if (copy_to_user(optval,&val,len))
1079                 return -EFAULT;
1080         return 0;
1081 }
1082 
1083 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1084                           char __user *optval, int __user *optlen)
1085 {
1086         switch (level) {
1087         case SOL_RAW:
1088                 break;
1089 
1090         case SOL_ICMPV6:
1091                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1092                         return -EOPNOTSUPP;
1093                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1094         case SOL_IPV6:
1095                 if (optname == IPV6_CHECKSUM)
1096                         break;
1097         default:
1098                 return ipv6_getsockopt(sk, level, optname, optval, optlen);
1099         }
1100 
1101         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1102 }
1103 
1104 #ifdef CONFIG_COMPAT
1105 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1106                                    char __user *optval, int __user *optlen)
1107 {
1108         switch (level) {
1109         case SOL_RAW:
1110                 break;
1111         case SOL_ICMPV6:
1112                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1113                         return -EOPNOTSUPP;
1114                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1115         case SOL_IPV6:
1116                 if (optname == IPV6_CHECKSUM)
1117                         break;
1118         default:
1119                 return compat_ipv6_getsockopt(sk, level, optname,
1120                                               optval, optlen);
1121         }
1122         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1123 }
1124 #endif
1125 
1126 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1127 {
1128         switch (cmd) {
1129         case SIOCOUTQ: {
1130                 int amount = sk_wmem_alloc_get(sk);
1131 
1132                 return put_user(amount, (int __user *)arg);
1133         }
1134         case SIOCINQ: {
1135                 struct sk_buff *skb;
1136                 int amount = 0;
1137 
1138                 spin_lock_bh(&sk->sk_receive_queue.lock);
1139                 skb = skb_peek(&sk->sk_receive_queue);
1140                 if (skb != NULL)
1141                         amount = skb->tail - skb->transport_header;
1142                 spin_unlock_bh(&sk->sk_receive_queue.lock);
1143                 return put_user(amount, (int __user *)arg);
1144         }
1145 
1146         default:
1147 #ifdef CONFIG_IPV6_MROUTE
1148                 return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1149 #else
1150                 return -ENOIOCTLCMD;
1151 #endif
1152         }
1153 }
1154 
1155 #ifdef CONFIG_COMPAT
1156 static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
1157 {
1158         switch (cmd) {
1159         case SIOCOUTQ:
1160         case SIOCINQ:
1161                 return -ENOIOCTLCMD;
1162         default:
1163 #ifdef CONFIG_IPV6_MROUTE
1164                 return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
1165 #else
1166                 return -ENOIOCTLCMD;
1167 #endif
1168         }
1169 }
1170 #endif
1171 
1172 static void rawv6_close(struct sock *sk, long timeout)
1173 {
1174         if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1175                 ip6_ra_control(sk, -1);
1176         ip6mr_sk_done(sk);
1177         sk_common_release(sk);
1178 }
1179 
1180 static void raw6_destroy(struct sock *sk)
1181 {
1182         lock_sock(sk);
1183         ip6_flush_pending_frames(sk);
1184         release_sock(sk);
1185 
1186         inet6_destroy_sock(sk);
1187 }
1188 
1189 static int rawv6_init_sk(struct sock *sk)
1190 {
1191         struct raw6_sock *rp = raw6_sk(sk);
1192 
1193         switch (inet_sk(sk)->inet_num) {
1194         case IPPROTO_ICMPV6:
1195                 rp->checksum = 1;
1196                 rp->offset   = 2;
1197                 break;
1198         case IPPROTO_MH:
1199                 rp->checksum = 1;
1200                 rp->offset   = 4;
1201                 break;
1202         default:
1203                 break;
1204         }
1205         return 0;
1206 }
1207 
1208 struct proto rawv6_prot = {
1209         .name              = "RAWv6",
1210         .owner             = THIS_MODULE,
1211         .close             = rawv6_close,
1212         .destroy           = raw6_destroy,
1213         .connect           = ip6_datagram_connect,
1214         .disconnect        = udp_disconnect,
1215         .ioctl             = rawv6_ioctl,
1216         .init              = rawv6_init_sk,
1217         .setsockopt        = rawv6_setsockopt,
1218         .getsockopt        = rawv6_getsockopt,
1219         .sendmsg           = rawv6_sendmsg,
1220         .recvmsg           = rawv6_recvmsg,
1221         .bind              = rawv6_bind,
1222         .backlog_rcv       = rawv6_rcv_skb,
1223         .hash              = raw_hash_sk,
1224         .unhash            = raw_unhash_sk,
1225         .obj_size          = sizeof(struct raw6_sock),
1226         .h.raw_hash        = &raw_v6_hashinfo,
1227 #ifdef CONFIG_COMPAT
1228         .compat_setsockopt = compat_rawv6_setsockopt,
1229         .compat_getsockopt = compat_rawv6_getsockopt,
1230         .compat_ioctl      = compat_rawv6_ioctl,
1231 #endif
1232 };
1233 
1234 #ifdef CONFIG_PROC_FS
1235 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1236 {
1237         struct ipv6_pinfo *np = inet6_sk(sp);
1238         const struct in6_addr *dest, *src;
1239         __u16 destp, srcp;
1240 
1241         dest  = &np->daddr;
1242         src   = &np->rcv_saddr;
1243         destp = 0;
1244         srcp  = inet_sk(sp)->inet_num;
1245         seq_printf(seq,
1246                    "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1247                    "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d\n",
1248                    i,
1249                    src->s6_addr32[0], src->s6_addr32[1],
1250                    src->s6_addr32[2], src->s6_addr32[3], srcp,
1251                    dest->s6_addr32[0], dest->s6_addr32[1],
1252                    dest->s6_addr32[2], dest->s6_addr32[3], destp,
1253                    sp->sk_state,
1254                    sk_wmem_alloc_get(sp),
1255                    sk_rmem_alloc_get(sp),
1256                    0, 0L, 0,
1257                    from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)),
1258                    0,
1259                    sock_i_ino(sp),
1260                    atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1261 }
1262 
1263 static int raw6_seq_show(struct seq_file *seq, void *v)
1264 {
1265         if (v == SEQ_START_TOKEN)
1266                 seq_printf(seq,
1267                            "  sl  "
1268                            "local_address                         "
1269                            "remote_address                        "
1270                            "st tx_queue rx_queue tr tm->when retrnsmt"
1271                            "   uid  timeout inode ref pointer drops\n");
1272         else
1273                 raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1274         return 0;
1275 }
1276 
1277 static const struct seq_operations raw6_seq_ops = {
1278         .start =        raw_seq_start,
1279         .next =         raw_seq_next,
1280         .stop =         raw_seq_stop,
1281         .show =         raw6_seq_show,
1282 };
1283 
1284 static int raw6_seq_open(struct inode *inode, struct file *file)
1285 {
1286         return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1287 }
1288 
1289 static const struct file_operations raw6_seq_fops = {
1290         .owner =        THIS_MODULE,
1291         .open =         raw6_seq_open,
1292         .read =         seq_read,
1293         .llseek =       seq_lseek,
1294         .release =      seq_release_net,
1295 };
1296 
1297 static int __net_init raw6_init_net(struct net *net)
1298 {
1299         if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops))
1300                 return -ENOMEM;
1301 
1302         return 0;
1303 }
1304 
1305 static void __net_exit raw6_exit_net(struct net *net)
1306 {
1307         proc_net_remove(net, "raw6");
1308 }
1309 
1310 static struct pernet_operations raw6_net_ops = {
1311         .init = raw6_init_net,
1312         .exit = raw6_exit_net,
1313 };
1314 
1315 int __init raw6_proc_init(void)
1316 {
1317         return register_pernet_subsys(&raw6_net_ops);
1318 }
1319 
1320 void raw6_proc_exit(void)
1321 {
1322         unregister_pernet_subsys(&raw6_net_ops);
1323 }
1324 #endif  /* CONFIG_PROC_FS */
1325 
1326 /* Same as inet6_dgram_ops, sans udp_poll.  */
1327 static const struct proto_ops inet6_sockraw_ops = {
1328         .family            = PF_INET6,
1329         .owner             = THIS_MODULE,
1330         .release           = inet6_release,
1331         .bind              = inet6_bind,
1332         .connect           = inet_dgram_connect,        /* ok           */
1333         .socketpair        = sock_no_socketpair,        /* a do nothing */
1334         .accept            = sock_no_accept,            /* a do nothing */
1335         .getname           = inet6_getname,
1336         .poll              = datagram_poll,             /* ok           */
1337         .ioctl             = inet6_ioctl,               /* must change  */
1338         .listen            = sock_no_listen,            /* ok           */
1339         .shutdown          = inet_shutdown,             /* ok           */
1340         .setsockopt        = sock_common_setsockopt,    /* ok           */
1341         .getsockopt        = sock_common_getsockopt,    /* ok           */
1342         .sendmsg           = inet_sendmsg,              /* ok           */
1343         .recvmsg           = sock_common_recvmsg,       /* ok           */
1344         .mmap              = sock_no_mmap,
1345         .sendpage          = sock_no_sendpage,
1346 #ifdef CONFIG_COMPAT
1347         .compat_setsockopt = compat_sock_common_setsockopt,
1348         .compat_getsockopt = compat_sock_common_getsockopt,
1349 #endif
1350 };
1351 
1352 static struct inet_protosw rawv6_protosw = {
1353         .type           = SOCK_RAW,
1354         .protocol       = IPPROTO_IP,   /* wild card */
1355         .prot           = &rawv6_prot,
1356         .ops            = &inet6_sockraw_ops,
1357         .no_check       = UDP_CSUM_DEFAULT,
1358         .flags          = INET_PROTOSW_REUSE,
1359 };
1360 
1361 int __init rawv6_init(void)
1362 {
1363         int ret;
1364 
1365         ret = inet6_register_protosw(&rawv6_protosw);
1366         if (ret)
1367                 goto out;
1368 out:
1369         return ret;
1370 }
1371 
1372 void rawv6_exit(void)
1373 {
1374         inet6_unregister_protosw(&rawv6_protosw);
1375 }
1376 

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