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Linux/net/ipv6/raw.c

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  1 /*
  2  *      RAW sockets for IPv6
  3  *      Linux INET6 implementation
  4  *
  5  *      Authors:
  6  *      Pedro Roque             <roque@di.fc.ul.pt>
  7  *
  8  *      Adapted from linux/net/ipv4/raw.c
  9  *
 10  *      Fixes:
 11  *      Hideaki YOSHIFUJI       :       sin6_scope_id support
 12  *      YOSHIFUJI,H.@USAGI      :       raw checksum (RFC2292(bis) compliance)
 13  *      Kazunori MIYAZAWA @USAGI:       change process style to use ip6_append_data
 14  *
 15  *      This program is free software; you can redistribute it and/or
 16  *      modify it under the terms of the GNU General Public License
 17  *      as published by the Free Software Foundation; either version
 18  *      2 of the License, or (at your option) any later version.
 19  */
 20 
 21 #include <linux/errno.h>
 22 #include <linux/types.h>
 23 #include <linux/socket.h>
 24 #include <linux/slab.h>
 25 #include <linux/sockios.h>
 26 #include <linux/net.h>
 27 #include <linux/in6.h>
 28 #include <linux/netdevice.h>
 29 #include <linux/if_arp.h>
 30 #include <linux/icmpv6.h>
 31 #include <linux/netfilter.h>
 32 #include <linux/netfilter_ipv6.h>
 33 #include <linux/skbuff.h>
 34 #include <linux/compat.h>
 35 #include <linux/uaccess.h>
 36 #include <asm/ioctls.h>
 37 
 38 #include <net/net_namespace.h>
 39 #include <net/ip.h>
 40 #include <net/sock.h>
 41 #include <net/snmp.h>
 42 
 43 #include <net/ipv6.h>
 44 #include <net/ndisc.h>
 45 #include <net/protocol.h>
 46 #include <net/ip6_route.h>
 47 #include <net/ip6_checksum.h>
 48 #include <net/addrconf.h>
 49 #include <net/transp_v6.h>
 50 #include <net/udp.h>
 51 #include <net/inet_common.h>
 52 #include <net/tcp_states.h>
 53 #if IS_ENABLED(CONFIG_IPV6_MIP6)
 54 #include <net/mip6.h>
 55 #endif
 56 #include <linux/mroute6.h>
 57 
 58 #include <net/raw.h>
 59 #include <net/rawv6.h>
 60 #include <net/xfrm.h>
 61 
 62 #include <linux/proc_fs.h>
 63 #include <linux/seq_file.h>
 64 #include <linux/export.h>
 65 
 66 #define ICMPV6_HDRLEN   4       /* ICMPv6 header, RFC 4443 Section 2.1 */
 67 
 68 struct raw_hashinfo raw_v6_hashinfo = {
 69         .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
 70 };
 71 EXPORT_SYMBOL_GPL(raw_v6_hashinfo);
 72 
 73 struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
 74                 unsigned short num, const struct in6_addr *loc_addr,
 75                 const struct in6_addr *rmt_addr, int dif)
 76 {
 77         bool is_multicast = ipv6_addr_is_multicast(loc_addr);
 78 
 79         sk_for_each_from(sk)
 80                 if (inet_sk(sk)->inet_num == num) {
 81 
 82                         if (!net_eq(sock_net(sk), net))
 83                                 continue;
 84 
 85                         if (!ipv6_addr_any(&sk->sk_v6_daddr) &&
 86                             !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr))
 87                                 continue;
 88 
 89                         if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
 90                                 continue;
 91 
 92                         if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) {
 93                                 if (ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr))
 94                                         goto found;
 95                                 if (is_multicast &&
 96                                     inet6_mc_check(sk, loc_addr, rmt_addr))
 97                                         goto found;
 98                                 continue;
 99                         }
100                         goto found;
101                 }
102         sk = NULL;
103 found:
104         return sk;
105 }
106 EXPORT_SYMBOL_GPL(__raw_v6_lookup);
107 
108 /*
109  *      0 - deliver
110  *      1 - block
111  */
112 static int icmpv6_filter(const struct sock *sk, const struct sk_buff *skb)
113 {
114         struct icmp6hdr _hdr;
115         const struct icmp6hdr *hdr;
116 
117         /* We require only the four bytes of the ICMPv6 header, not any
118          * additional bytes of message body in "struct icmp6hdr".
119          */
120         hdr = skb_header_pointer(skb, skb_transport_offset(skb),
121                                  ICMPV6_HDRLEN, &_hdr);
122         if (hdr) {
123                 const __u32 *data = &raw6_sk(sk)->filter.data[0];
124                 unsigned int type = hdr->icmp6_type;
125 
126                 return (data[type >> 5] & (1U << (type & 31))) != 0;
127         }
128         return 1;
129 }
130 
131 #if IS_ENABLED(CONFIG_IPV6_MIP6)
132 typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb);
133 
134 static mh_filter_t __rcu *mh_filter __read_mostly;
135 
136 int rawv6_mh_filter_register(mh_filter_t filter)
137 {
138         rcu_assign_pointer(mh_filter, filter);
139         return 0;
140 }
141 EXPORT_SYMBOL(rawv6_mh_filter_register);
142 
143 int rawv6_mh_filter_unregister(mh_filter_t filter)
144 {
145         RCU_INIT_POINTER(mh_filter, NULL);
146         synchronize_rcu();
147         return 0;
148 }
149 EXPORT_SYMBOL(rawv6_mh_filter_unregister);
150 
151 #endif
152 
153 /*
154  *      demultiplex raw sockets.
155  *      (should consider queueing the skb in the sock receive_queue
156  *      without calling rawv6.c)
157  *
158  *      Caller owns SKB so we must make clones.
159  */
160 static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
161 {
162         const struct in6_addr *saddr;
163         const struct in6_addr *daddr;
164         struct sock *sk;
165         bool delivered = false;
166         __u8 hash;
167         struct net *net;
168 
169         saddr = &ipv6_hdr(skb)->saddr;
170         daddr = saddr + 1;
171 
172         hash = nexthdr & (RAW_HTABLE_SIZE - 1);
173 
174         read_lock(&raw_v6_hashinfo.lock);
175         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
176 
177         if (!sk)
178                 goto out;
179 
180         net = dev_net(skb->dev);
181         sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, inet6_iif(skb));
182 
183         while (sk) {
184                 int filtered;
185 
186                 delivered = true;
187                 switch (nexthdr) {
188                 case IPPROTO_ICMPV6:
189                         filtered = icmpv6_filter(sk, skb);
190                         break;
191 
192 #if IS_ENABLED(CONFIG_IPV6_MIP6)
193                 case IPPROTO_MH:
194                 {
195                         /* XXX: To validate MH only once for each packet,
196                          * this is placed here. It should be after checking
197                          * xfrm policy, however it doesn't. The checking xfrm
198                          * policy is placed in rawv6_rcv() because it is
199                          * required for each socket.
200                          */
201                         mh_filter_t *filter;
202 
203                         filter = rcu_dereference(mh_filter);
204                         filtered = filter ? (*filter)(sk, skb) : 0;
205                         break;
206                 }
207 #endif
208                 default:
209                         filtered = 0;
210                         break;
211                 }
212 
213                 if (filtered < 0)
214                         break;
215                 if (filtered == 0) {
216                         struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
217 
218                         /* Not releasing hash table! */
219                         if (clone) {
220                                 nf_reset(clone);
221                                 rawv6_rcv(sk, clone);
222                         }
223                 }
224                 sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
225                                      inet6_iif(skb));
226         }
227 out:
228         read_unlock(&raw_v6_hashinfo.lock);
229         return delivered;
230 }
231 
232 bool raw6_local_deliver(struct sk_buff *skb, int nexthdr)
233 {
234         struct sock *raw_sk;
235 
236         raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (RAW_HTABLE_SIZE - 1)]);
237         if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
238                 raw_sk = NULL;
239 
240         return raw_sk != NULL;
241 }
242 
243 /* This cleans up af_inet6 a bit. -DaveM */
244 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
245 {
246         struct inet_sock *inet = inet_sk(sk);
247         struct ipv6_pinfo *np = inet6_sk(sk);
248         struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
249         __be32 v4addr = 0;
250         int addr_type;
251         int err;
252 
253         if (addr_len < SIN6_LEN_RFC2133)
254                 return -EINVAL;
255 
256         if (addr->sin6_family != AF_INET6)
257                 return -EINVAL;
258 
259         addr_type = ipv6_addr_type(&addr->sin6_addr);
260 
261         /* Raw sockets are IPv6 only */
262         if (addr_type == IPV6_ADDR_MAPPED)
263                 return -EADDRNOTAVAIL;
264 
265         lock_sock(sk);
266 
267         err = -EINVAL;
268         if (sk->sk_state != TCP_CLOSE)
269                 goto out;
270 
271         rcu_read_lock();
272         /* Check if the address belongs to the host. */
273         if (addr_type != IPV6_ADDR_ANY) {
274                 struct net_device *dev = NULL;
275 
276                 if (__ipv6_addr_needs_scope_id(addr_type)) {
277                         if (addr_len >= sizeof(struct sockaddr_in6) &&
278                             addr->sin6_scope_id) {
279                                 /* Override any existing binding, if another
280                                  * one is supplied by user.
281                                  */
282                                 sk->sk_bound_dev_if = addr->sin6_scope_id;
283                         }
284 
285                         /* Binding to link-local address requires an interface */
286                         if (!sk->sk_bound_dev_if)
287                                 goto out_unlock;
288 
289                         err = -ENODEV;
290                         dev = dev_get_by_index_rcu(sock_net(sk),
291                                                    sk->sk_bound_dev_if);
292                         if (!dev)
293                                 goto out_unlock;
294                 }
295 
296                 /* ipv4 addr of the socket is invalid.  Only the
297                  * unspecified and mapped address have a v4 equivalent.
298                  */
299                 v4addr = LOOPBACK4_IPV6;
300                 if (!(addr_type & IPV6_ADDR_MULTICAST) &&
301                     !sock_net(sk)->ipv6.sysctl.ip_nonlocal_bind) {
302                         err = -EADDRNOTAVAIL;
303                         if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
304                                            dev, 0)) {
305                                 goto out_unlock;
306                         }
307                 }
308         }
309 
310         inet->inet_rcv_saddr = inet->inet_saddr = v4addr;
311         sk->sk_v6_rcv_saddr = addr->sin6_addr;
312         if (!(addr_type & IPV6_ADDR_MULTICAST))
313                 np->saddr = addr->sin6_addr;
314         err = 0;
315 out_unlock:
316         rcu_read_unlock();
317 out:
318         release_sock(sk);
319         return err;
320 }
321 
322 static void rawv6_err(struct sock *sk, struct sk_buff *skb,
323                struct inet6_skb_parm *opt,
324                u8 type, u8 code, int offset, __be32 info)
325 {
326         struct inet_sock *inet = inet_sk(sk);
327         struct ipv6_pinfo *np = inet6_sk(sk);
328         int err;
329         int harderr;
330 
331         /* Report error on raw socket, if:
332            1. User requested recverr.
333            2. Socket is connected (otherwise the error indication
334               is useless without recverr and error is hard.
335          */
336         if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
337                 return;
338 
339         harderr = icmpv6_err_convert(type, code, &err);
340         if (type == ICMPV6_PKT_TOOBIG) {
341                 ip6_sk_update_pmtu(skb, sk, info);
342                 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
343         }
344         if (type == NDISC_REDIRECT) {
345                 ip6_sk_redirect(skb, sk);
346                 return;
347         }
348         if (np->recverr) {
349                 u8 *payload = skb->data;
350                 if (!inet->hdrincl)
351                         payload += offset;
352                 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
353         }
354 
355         if (np->recverr || harderr) {
356                 sk->sk_err = err;
357                 sk->sk_error_report(sk);
358         }
359 }
360 
361 void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
362                 u8 type, u8 code, int inner_offset, __be32 info)
363 {
364         struct sock *sk;
365         int hash;
366         const struct in6_addr *saddr, *daddr;
367         struct net *net;
368 
369         hash = nexthdr & (RAW_HTABLE_SIZE - 1);
370 
371         read_lock(&raw_v6_hashinfo.lock);
372         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
373         if (sk) {
374                 /* Note: ipv6_hdr(skb) != skb->data */
375                 const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data;
376                 saddr = &ip6h->saddr;
377                 daddr = &ip6h->daddr;
378                 net = dev_net(skb->dev);
379 
380                 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
381                                                 inet6_iif(skb)))) {
382                         rawv6_err(sk, skb, NULL, type, code,
383                                         inner_offset, info);
384                         sk = sk_next(sk);
385                 }
386         }
387         read_unlock(&raw_v6_hashinfo.lock);
388 }
389 
390 static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb)
391 {
392         if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) &&
393             skb_checksum_complete(skb)) {
394                 atomic_inc(&sk->sk_drops);
395                 kfree_skb(skb);
396                 return NET_RX_DROP;
397         }
398 
399         /* Charge it to the socket. */
400         skb_dst_drop(skb);
401         if (sock_queue_rcv_skb(sk, skb) < 0) {
402                 kfree_skb(skb);
403                 return NET_RX_DROP;
404         }
405 
406         return 0;
407 }
408 
409 /*
410  *      This is next to useless...
411  *      if we demultiplex in network layer we don't need the extra call
412  *      just to queue the skb...
413  *      maybe we could have the network decide upon a hint if it
414  *      should call raw_rcv for demultiplexing
415  */
416 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
417 {
418         struct inet_sock *inet = inet_sk(sk);
419         struct raw6_sock *rp = raw6_sk(sk);
420 
421         if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
422                 atomic_inc(&sk->sk_drops);
423                 kfree_skb(skb);
424                 return NET_RX_DROP;
425         }
426 
427         if (!rp->checksum)
428                 skb->ip_summed = CHECKSUM_UNNECESSARY;
429 
430         if (skb->ip_summed == CHECKSUM_COMPLETE) {
431                 skb_postpull_rcsum(skb, skb_network_header(skb),
432                                    skb_network_header_len(skb));
433                 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
434                                      &ipv6_hdr(skb)->daddr,
435                                      skb->len, inet->inet_num, skb->csum))
436                         skb->ip_summed = CHECKSUM_UNNECESSARY;
437         }
438         if (!skb_csum_unnecessary(skb))
439                 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
440                                                          &ipv6_hdr(skb)->daddr,
441                                                          skb->len,
442                                                          inet->inet_num, 0));
443 
444         if (inet->hdrincl) {
445                 if (skb_checksum_complete(skb)) {
446                         atomic_inc(&sk->sk_drops);
447                         kfree_skb(skb);
448                         return NET_RX_DROP;
449                 }
450         }
451 
452         rawv6_rcv_skb(sk, skb);
453         return 0;
454 }
455 
456 
457 /*
458  *      This should be easy, if there is something there
459  *      we return it, otherwise we block.
460  */
461 
462 static int rawv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
463                          int noblock, int flags, int *addr_len)
464 {
465         struct ipv6_pinfo *np = inet6_sk(sk);
466         DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
467         struct sk_buff *skb;
468         size_t copied;
469         int err;
470 
471         if (flags & MSG_OOB)
472                 return -EOPNOTSUPP;
473 
474         if (flags & MSG_ERRQUEUE)
475                 return ipv6_recv_error(sk, msg, len, addr_len);
476 
477         if (np->rxpmtu && np->rxopt.bits.rxpmtu)
478                 return ipv6_recv_rxpmtu(sk, msg, len, addr_len);
479 
480         skb = skb_recv_datagram(sk, flags, noblock, &err);
481         if (!skb)
482                 goto out;
483         if (ccs_socket_post_recvmsg_permission(sk, skb, flags)) {
484                 err = -EAGAIN; /* Hope less harmful than -EPERM. */
485                 goto out;
486         }
487 
488         copied = skb->len;
489         if (copied > len) {
490                 copied = len;
491                 msg->msg_flags |= MSG_TRUNC;
492         }
493 
494         if (skb_csum_unnecessary(skb)) {
495                 err = skb_copy_datagram_msg(skb, 0, msg, copied);
496         } else if (msg->msg_flags&MSG_TRUNC) {
497                 if (__skb_checksum_complete(skb))
498                         goto csum_copy_err;
499                 err = skb_copy_datagram_msg(skb, 0, msg, copied);
500         } else {
501                 err = skb_copy_and_csum_datagram_msg(skb, 0, msg);
502                 if (err == -EINVAL)
503                         goto csum_copy_err;
504         }
505         if (err)
506                 goto out_free;
507 
508         /* Copy the address. */
509         if (sin6) {
510                 sin6->sin6_family = AF_INET6;
511                 sin6->sin6_port = 0;
512                 sin6->sin6_addr = ipv6_hdr(skb)->saddr;
513                 sin6->sin6_flowinfo = 0;
514                 sin6->sin6_scope_id = ipv6_iface_scope_id(&sin6->sin6_addr,
515                                                           inet6_iif(skb));
516                 *addr_len = sizeof(*sin6);
517         }
518 
519         sock_recv_ts_and_drops(msg, sk, skb);
520 
521         if (np->rxopt.all)
522                 ip6_datagram_recv_ctl(sk, msg, skb);
523 
524         err = copied;
525         if (flags & MSG_TRUNC)
526                 err = skb->len;
527 
528 out_free:
529         skb_free_datagram(sk, skb);
530 out:
531         return err;
532 
533 csum_copy_err:
534         skb_kill_datagram(sk, skb, flags);
535 
536         /* Error for blocking case is chosen to masquerade
537            as some normal condition.
538          */
539         err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
540         goto out;
541 }
542 
543 static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
544                                      struct raw6_sock *rp)
545 {
546         struct sk_buff *skb;
547         int err = 0;
548         int offset;
549         int len;
550         int total_len;
551         __wsum tmp_csum;
552         __sum16 csum;
553 
554         if (!rp->checksum)
555                 goto send;
556 
557         skb = skb_peek(&sk->sk_write_queue);
558         if (!skb)
559                 goto out;
560 
561         offset = rp->offset;
562         total_len = inet_sk(sk)->cork.base.length;
563         if (offset >= total_len - 1) {
564                 err = -EINVAL;
565                 ip6_flush_pending_frames(sk);
566                 goto out;
567         }
568 
569         /* should be check HW csum miyazawa */
570         if (skb_queue_len(&sk->sk_write_queue) == 1) {
571                 /*
572                  * Only one fragment on the socket.
573                  */
574                 tmp_csum = skb->csum;
575         } else {
576                 struct sk_buff *csum_skb = NULL;
577                 tmp_csum = 0;
578 
579                 skb_queue_walk(&sk->sk_write_queue, skb) {
580                         tmp_csum = csum_add(tmp_csum, skb->csum);
581 
582                         if (csum_skb)
583                                 continue;
584 
585                         len = skb->len - skb_transport_offset(skb);
586                         if (offset >= len) {
587                                 offset -= len;
588                                 continue;
589                         }
590 
591                         csum_skb = skb;
592                 }
593 
594                 skb = csum_skb;
595         }
596 
597         offset += skb_transport_offset(skb);
598         err = skb_copy_bits(skb, offset, &csum, 2);
599         if (err < 0) {
600                 ip6_flush_pending_frames(sk);
601                 goto out;
602         }
603 
604         /* in case cksum was not initialized */
605         if (unlikely(csum))
606                 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
607 
608         csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr,
609                                total_len, fl6->flowi6_proto, tmp_csum);
610 
611         if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP)
612                 csum = CSUM_MANGLED_0;
613 
614         BUG_ON(skb_store_bits(skb, offset, &csum, 2));
615 
616 send:
617         err = ip6_push_pending_frames(sk);
618 out:
619         return err;
620 }
621 
622 static int rawv6_send_hdrinc(struct sock *sk, struct msghdr *msg, int length,
623                         struct flowi6 *fl6, struct dst_entry **dstp,
624                         unsigned int flags)
625 {
626         struct ipv6_pinfo *np = inet6_sk(sk);
627         struct net *net = sock_net(sk);
628         struct ipv6hdr *iph;
629         struct sk_buff *skb;
630         int err;
631         struct rt6_info *rt = (struct rt6_info *)*dstp;
632         int hlen = LL_RESERVED_SPACE(rt->dst.dev);
633         int tlen = rt->dst.dev->needed_tailroom;
634 
635         if (length > rt->dst.dev->mtu) {
636                 ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu);
637                 return -EMSGSIZE;
638         }
639         if (length < sizeof(struct ipv6hdr))
640                 return -EINVAL;
641         if (flags&MSG_PROBE)
642                 goto out;
643 
644         skb = sock_alloc_send_skb(sk,
645                                   length + hlen + tlen + 15,
646                                   flags & MSG_DONTWAIT, &err);
647         if (!skb)
648                 goto error;
649         skb_reserve(skb, hlen);
650 
651         skb->protocol = htons(ETH_P_IPV6);
652         skb->priority = sk->sk_priority;
653         skb->mark = sk->sk_mark;
654         skb_dst_set(skb, &rt->dst);
655         *dstp = NULL;
656 
657         skb_put(skb, length);
658         skb_reset_network_header(skb);
659         iph = ipv6_hdr(skb);
660 
661         skb->ip_summed = CHECKSUM_NONE;
662 
663         if (flags & MSG_CONFIRM)
664                 skb_set_dst_pending_confirm(skb, 1);
665 
666         skb->transport_header = skb->network_header;
667         err = memcpy_from_msg(iph, msg, length);
668         if (err)
669                 goto error_fault;
670 
671         /* if egress device is enslaved to an L3 master device pass the
672          * skb to its handler for processing
673          */
674         skb = l3mdev_ip6_out(sk, skb);
675         if (unlikely(!skb))
676                 return 0;
677 
678         IP6_UPD_PO_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
679         err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, net, sk, skb,
680                       NULL, rt->dst.dev, dst_output);
681         if (err > 0)
682                 err = net_xmit_errno(err);
683         if (err)
684                 goto error;
685 out:
686         return 0;
687 
688 error_fault:
689         err = -EFAULT;
690         kfree_skb(skb);
691 error:
692         IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
693         if (err == -ENOBUFS && !np->recverr)
694                 err = 0;
695         return err;
696 }
697 
698 struct raw6_frag_vec {
699         struct msghdr *msg;
700         int hlen;
701         char c[4];
702 };
703 
704 static int rawv6_probe_proto_opt(struct raw6_frag_vec *rfv, struct flowi6 *fl6)
705 {
706         int err = 0;
707         switch (fl6->flowi6_proto) {
708         case IPPROTO_ICMPV6:
709                 rfv->hlen = 2;
710                 err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen);
711                 if (!err) {
712                         fl6->fl6_icmp_type = rfv->c[0];
713                         fl6->fl6_icmp_code = rfv->c[1];
714                 }
715                 break;
716         case IPPROTO_MH:
717                 rfv->hlen = 4;
718                 err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen);
719                 if (!err)
720                         fl6->fl6_mh_type = rfv->c[2];
721         }
722         return err;
723 }
724 
725 static int raw6_getfrag(void *from, char *to, int offset, int len, int odd,
726                        struct sk_buff *skb)
727 {
728         struct raw6_frag_vec *rfv = from;
729 
730         if (offset < rfv->hlen) {
731                 int copy = min(rfv->hlen - offset, len);
732 
733                 if (skb->ip_summed == CHECKSUM_PARTIAL)
734                         memcpy(to, rfv->c + offset, copy);
735                 else
736                         skb->csum = csum_block_add(
737                                 skb->csum,
738                                 csum_partial_copy_nocheck(rfv->c + offset,
739                                                           to, copy, 0),
740                                 odd);
741 
742                 odd = 0;
743                 offset += copy;
744                 to += copy;
745                 len -= copy;
746 
747                 if (!len)
748                         return 0;
749         }
750 
751         offset -= rfv->hlen;
752 
753         return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb);
754 }
755 
756 static int rawv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
757 {
758         struct ipv6_txoptions *opt_to_free = NULL;
759         struct ipv6_txoptions opt_space;
760         DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
761         struct in6_addr *daddr, *final_p, final;
762         struct inet_sock *inet = inet_sk(sk);
763         struct ipv6_pinfo *np = inet6_sk(sk);
764         struct raw6_sock *rp = raw6_sk(sk);
765         struct ipv6_txoptions *opt = NULL;
766         struct ip6_flowlabel *flowlabel = NULL;
767         struct dst_entry *dst = NULL;
768         struct raw6_frag_vec rfv;
769         struct flowi6 fl6;
770         struct sockcm_cookie sockc;
771         struct ipcm6_cookie ipc6;
772         int addr_len = msg->msg_namelen;
773         u16 proto;
774         int err;
775 
776         /* Rough check on arithmetic overflow,
777            better check is made in ip6_append_data().
778          */
779         if (len > INT_MAX)
780                 return -EMSGSIZE;
781 
782         /* Mirror BSD error message compatibility */
783         if (msg->msg_flags & MSG_OOB)
784                 return -EOPNOTSUPP;
785 
786         /*
787          *      Get and verify the address.
788          */
789         memset(&fl6, 0, sizeof(fl6));
790 
791         fl6.flowi6_mark = sk->sk_mark;
792         fl6.flowi6_uid = sk->sk_uid;
793 
794         ipc6.hlimit = -1;
795         ipc6.tclass = -1;
796         ipc6.dontfrag = -1;
797         ipc6.opt = NULL;
798 
799         if (sin6) {
800                 if (addr_len < SIN6_LEN_RFC2133)
801                         return -EINVAL;
802 
803                 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
804                         return -EAFNOSUPPORT;
805 
806                 /* port is the proto value [0..255] carried in nexthdr */
807                 proto = ntohs(sin6->sin6_port);
808 
809                 if (!proto)
810                         proto = inet->inet_num;
811                 else if (proto != inet->inet_num)
812                         return -EINVAL;
813 
814                 if (proto > 255)
815                         return -EINVAL;
816 
817                 daddr = &sin6->sin6_addr;
818                 if (np->sndflow) {
819                         fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
820                         if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
821                                 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
822                                 if (!flowlabel)
823                                         return -EINVAL;
824                         }
825                 }
826 
827                 /*
828                  * Otherwise it will be difficult to maintain
829                  * sk->sk_dst_cache.
830                  */
831                 if (sk->sk_state == TCP_ESTABLISHED &&
832                     ipv6_addr_equal(daddr, &sk->sk_v6_daddr))
833                         daddr = &sk->sk_v6_daddr;
834 
835                 if (addr_len >= sizeof(struct sockaddr_in6) &&
836                     sin6->sin6_scope_id &&
837                     __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr)))
838                         fl6.flowi6_oif = sin6->sin6_scope_id;
839         } else {
840                 if (sk->sk_state != TCP_ESTABLISHED)
841                         return -EDESTADDRREQ;
842 
843                 proto = inet->inet_num;
844                 daddr = &sk->sk_v6_daddr;
845                 fl6.flowlabel = np->flow_label;
846         }
847 
848         if (fl6.flowi6_oif == 0)
849                 fl6.flowi6_oif = sk->sk_bound_dev_if;
850 
851         sockc.tsflags = sk->sk_tsflags;
852         if (msg->msg_controllen) {
853                 opt = &opt_space;
854                 memset(opt, 0, sizeof(struct ipv6_txoptions));
855                 opt->tot_len = sizeof(struct ipv6_txoptions);
856                 ipc6.opt = opt;
857 
858                 err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, &ipc6, &sockc);
859                 if (err < 0) {
860                         fl6_sock_release(flowlabel);
861                         return err;
862                 }
863                 if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
864                         flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
865                         if (!flowlabel)
866                                 return -EINVAL;
867                 }
868                 if (!(opt->opt_nflen|opt->opt_flen))
869                         opt = NULL;
870         }
871         if (!opt) {
872                 opt = txopt_get(np);
873                 opt_to_free = opt;
874         }
875         if (flowlabel)
876                 opt = fl6_merge_options(&opt_space, flowlabel, opt);
877         opt = ipv6_fixup_options(&opt_space, opt);
878 
879         fl6.flowi6_proto = proto;
880         rfv.msg = msg;
881         rfv.hlen = 0;
882         err = rawv6_probe_proto_opt(&rfv, &fl6);
883         if (err)
884                 goto out;
885 
886         if (!ipv6_addr_any(daddr))
887                 fl6.daddr = *daddr;
888         else
889                 fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
890         if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
891                 fl6.saddr = np->saddr;
892 
893         final_p = fl6_update_dst(&fl6, opt, &final);
894 
895         if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
896                 fl6.flowi6_oif = np->mcast_oif;
897         else if (!fl6.flowi6_oif)
898                 fl6.flowi6_oif = np->ucast_oif;
899         security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
900 
901         if (inet->hdrincl)
902                 fl6.flowi6_flags |= FLOWI_FLAG_KNOWN_NH;
903 
904         if (ipc6.tclass < 0)
905                 ipc6.tclass = np->tclass;
906 
907         fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel);
908 
909         dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
910         if (IS_ERR(dst)) {
911                 err = PTR_ERR(dst);
912                 goto out;
913         }
914         if (ipc6.hlimit < 0)
915                 ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
916 
917         if (ipc6.dontfrag < 0)
918                 ipc6.dontfrag = np->dontfrag;
919 
920         if (msg->msg_flags&MSG_CONFIRM)
921                 goto do_confirm;
922 
923 back_from_confirm:
924         if (inet->hdrincl)
925                 err = rawv6_send_hdrinc(sk, msg, len, &fl6, &dst, msg->msg_flags);
926         else {
927                 ipc6.opt = opt;
928                 lock_sock(sk);
929                 err = ip6_append_data(sk, raw6_getfrag, &rfv,
930                         len, 0, &ipc6, &fl6, (struct rt6_info *)dst,
931                         msg->msg_flags, &sockc);
932 
933                 if (err)
934                         ip6_flush_pending_frames(sk);
935                 else if (!(msg->msg_flags & MSG_MORE))
936                         err = rawv6_push_pending_frames(sk, &fl6, rp);
937                 release_sock(sk);
938         }
939 done:
940         dst_release(dst);
941 out:
942         fl6_sock_release(flowlabel);
943         txopt_put(opt_to_free);
944         return err < 0 ? err : len;
945 do_confirm:
946         if (msg->msg_flags & MSG_PROBE)
947                 dst_confirm_neigh(dst, &fl6.daddr);
948         if (!(msg->msg_flags & MSG_PROBE) || len)
949                 goto back_from_confirm;
950         err = 0;
951         goto done;
952 }
953 
954 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
955                                char __user *optval, int optlen)
956 {
957         switch (optname) {
958         case ICMPV6_FILTER:
959                 if (optlen > sizeof(struct icmp6_filter))
960                         optlen = sizeof(struct icmp6_filter);
961                 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
962                         return -EFAULT;
963                 return 0;
964         default:
965                 return -ENOPROTOOPT;
966         }
967 
968         return 0;
969 }
970 
971 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
972                                char __user *optval, int __user *optlen)
973 {
974         int len;
975 
976         switch (optname) {
977         case ICMPV6_FILTER:
978                 if (get_user(len, optlen))
979                         return -EFAULT;
980                 if (len < 0)
981                         return -EINVAL;
982                 if (len > sizeof(struct icmp6_filter))
983                         len = sizeof(struct icmp6_filter);
984                 if (put_user(len, optlen))
985                         return -EFAULT;
986                 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
987                         return -EFAULT;
988                 return 0;
989         default:
990                 return -ENOPROTOOPT;
991         }
992 
993         return 0;
994 }
995 
996 
997 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
998                             char __user *optval, unsigned int optlen)
999 {
1000         struct raw6_sock *rp = raw6_sk(sk);
1001         int val;
1002 
1003         if (get_user(val, (int __user *)optval))
1004                 return -EFAULT;
1005 
1006         switch (optname) {
1007         case IPV6_HDRINCL:
1008                 if (sk->sk_type != SOCK_RAW)
1009                         return -EINVAL;
1010                 inet_sk(sk)->hdrincl = !!val;
1011                 return 0;
1012         case IPV6_CHECKSUM:
1013                 if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
1014                     level == IPPROTO_IPV6) {
1015                         /*
1016                          * RFC3542 tells that IPV6_CHECKSUM socket
1017                          * option in the IPPROTO_IPV6 level is not
1018                          * allowed on ICMPv6 sockets.
1019                          * If you want to set it, use IPPROTO_RAW
1020                          * level IPV6_CHECKSUM socket option
1021                          * (Linux extension).
1022                          */
1023                         return -EINVAL;
1024                 }
1025 
1026                 /* You may get strange result with a positive odd offset;
1027                    RFC2292bis agrees with me. */
1028                 if (val > 0 && (val&1))
1029                         return -EINVAL;
1030                 if (val < 0) {
1031                         rp->checksum = 0;
1032                 } else {
1033                         rp->checksum = 1;
1034                         rp->offset = val;
1035                 }
1036 
1037                 return 0;
1038 
1039         default:
1040                 return -ENOPROTOOPT;
1041         }
1042 }
1043 
1044 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1045                           char __user *optval, unsigned int optlen)
1046 {
1047         switch (level) {
1048         case SOL_RAW:
1049                 break;
1050 
1051         case SOL_ICMPV6:
1052                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1053                         return -EOPNOTSUPP;
1054                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1055         case SOL_IPV6:
1056                 if (optname == IPV6_CHECKSUM ||
1057                     optname == IPV6_HDRINCL)
1058                         break;
1059         default:
1060                 return ipv6_setsockopt(sk, level, optname, optval, optlen);
1061         }
1062 
1063         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1064 }
1065 
1066 #ifdef CONFIG_COMPAT
1067 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1068                                    char __user *optval, unsigned int optlen)
1069 {
1070         switch (level) {
1071         case SOL_RAW:
1072                 break;
1073         case SOL_ICMPV6:
1074                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1075                         return -EOPNOTSUPP;
1076                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1077         case SOL_IPV6:
1078                 if (optname == IPV6_CHECKSUM ||
1079                     optname == IPV6_HDRINCL)
1080                         break;
1081         default:
1082                 return compat_ipv6_setsockopt(sk, level, optname,
1083                                               optval, optlen);
1084         }
1085         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1086 }
1087 #endif
1088 
1089 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1090                             char __user *optval, int __user *optlen)
1091 {
1092         struct raw6_sock *rp = raw6_sk(sk);
1093         int val, len;
1094 
1095         if (get_user(len, optlen))
1096                 return -EFAULT;
1097 
1098         switch (optname) {
1099         case IPV6_HDRINCL:
1100                 val = inet_sk(sk)->hdrincl;
1101                 break;
1102         case IPV6_CHECKSUM:
1103                 /*
1104                  * We allow getsockopt() for IPPROTO_IPV6-level
1105                  * IPV6_CHECKSUM socket option on ICMPv6 sockets
1106                  * since RFC3542 is silent about it.
1107                  */
1108                 if (rp->checksum == 0)
1109                         val = -1;
1110                 else
1111                         val = rp->offset;
1112                 break;
1113 
1114         default:
1115                 return -ENOPROTOOPT;
1116         }
1117 
1118         len = min_t(unsigned int, sizeof(int), len);
1119 
1120         if (put_user(len, optlen))
1121                 return -EFAULT;
1122         if (copy_to_user(optval, &val, len))
1123                 return -EFAULT;
1124         return 0;
1125 }
1126 
1127 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1128                           char __user *optval, int __user *optlen)
1129 {
1130         switch (level) {
1131         case SOL_RAW:
1132                 break;
1133 
1134         case SOL_ICMPV6:
1135                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1136                         return -EOPNOTSUPP;
1137                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1138         case SOL_IPV6:
1139                 if (optname == IPV6_CHECKSUM ||
1140                     optname == IPV6_HDRINCL)
1141                         break;
1142         default:
1143                 return ipv6_getsockopt(sk, level, optname, optval, optlen);
1144         }
1145 
1146         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1147 }
1148 
1149 #ifdef CONFIG_COMPAT
1150 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1151                                    char __user *optval, int __user *optlen)
1152 {
1153         switch (level) {
1154         case SOL_RAW:
1155                 break;
1156         case SOL_ICMPV6:
1157                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1158                         return -EOPNOTSUPP;
1159                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1160         case SOL_IPV6:
1161                 if (optname == IPV6_CHECKSUM ||
1162                     optname == IPV6_HDRINCL)
1163                         break;
1164         default:
1165                 return compat_ipv6_getsockopt(sk, level, optname,
1166                                               optval, optlen);
1167         }
1168         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1169 }
1170 #endif
1171 
1172 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1173 {
1174         switch (cmd) {
1175         case SIOCOUTQ: {
1176                 int amount = sk_wmem_alloc_get(sk);
1177 
1178                 return put_user(amount, (int __user *)arg);
1179         }
1180         case SIOCINQ: {
1181                 struct sk_buff *skb;
1182                 int amount = 0;
1183 
1184                 spin_lock_bh(&sk->sk_receive_queue.lock);
1185                 skb = skb_peek(&sk->sk_receive_queue);
1186                 if (skb)
1187                         amount = skb->len;
1188                 spin_unlock_bh(&sk->sk_receive_queue.lock);
1189                 return put_user(amount, (int __user *)arg);
1190         }
1191 
1192         default:
1193 #ifdef CONFIG_IPV6_MROUTE
1194                 return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1195 #else
1196                 return -ENOIOCTLCMD;
1197 #endif
1198         }
1199 }
1200 
1201 #ifdef CONFIG_COMPAT
1202 static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
1203 {
1204         switch (cmd) {
1205         case SIOCOUTQ:
1206         case SIOCINQ:
1207                 return -ENOIOCTLCMD;
1208         default:
1209 #ifdef CONFIG_IPV6_MROUTE
1210                 return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
1211 #else
1212                 return -ENOIOCTLCMD;
1213 #endif
1214         }
1215 }
1216 #endif
1217 
1218 static void rawv6_close(struct sock *sk, long timeout)
1219 {
1220         if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1221                 ip6_ra_control(sk, -1);
1222         ip6mr_sk_done(sk);
1223         sk_common_release(sk);
1224 }
1225 
1226 static void raw6_destroy(struct sock *sk)
1227 {
1228         lock_sock(sk);
1229         ip6_flush_pending_frames(sk);
1230         release_sock(sk);
1231 
1232         inet6_destroy_sock(sk);
1233 }
1234 
1235 static int rawv6_init_sk(struct sock *sk)
1236 {
1237         struct raw6_sock *rp = raw6_sk(sk);
1238 
1239         switch (inet_sk(sk)->inet_num) {
1240         case IPPROTO_ICMPV6:
1241                 rp->checksum = 1;
1242                 rp->offset   = 2;
1243                 break;
1244         case IPPROTO_MH:
1245                 rp->checksum = 1;
1246                 rp->offset   = 4;
1247                 break;
1248         default:
1249                 break;
1250         }
1251         return 0;
1252 }
1253 
1254 struct proto rawv6_prot = {
1255         .name              = "RAWv6",
1256         .owner             = THIS_MODULE,
1257         .close             = rawv6_close,
1258         .destroy           = raw6_destroy,
1259         .connect           = ip6_datagram_connect_v6_only,
1260         .disconnect        = __udp_disconnect,
1261         .ioctl             = rawv6_ioctl,
1262         .init              = rawv6_init_sk,
1263         .setsockopt        = rawv6_setsockopt,
1264         .getsockopt        = rawv6_getsockopt,
1265         .sendmsg           = rawv6_sendmsg,
1266         .recvmsg           = rawv6_recvmsg,
1267         .bind              = rawv6_bind,
1268         .backlog_rcv       = rawv6_rcv_skb,
1269         .hash              = raw_hash_sk,
1270         .unhash            = raw_unhash_sk,
1271         .obj_size          = sizeof(struct raw6_sock),
1272         .h.raw_hash        = &raw_v6_hashinfo,
1273 #ifdef CONFIG_COMPAT
1274         .compat_setsockopt = compat_rawv6_setsockopt,
1275         .compat_getsockopt = compat_rawv6_getsockopt,
1276         .compat_ioctl      = compat_rawv6_ioctl,
1277 #endif
1278         .diag_destroy      = raw_abort,
1279 };
1280 
1281 #ifdef CONFIG_PROC_FS
1282 static int raw6_seq_show(struct seq_file *seq, void *v)
1283 {
1284         if (v == SEQ_START_TOKEN) {
1285                 seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
1286         } else {
1287                 struct sock *sp = v;
1288                 __u16 srcp  = inet_sk(sp)->inet_num;
1289                 ip6_dgram_sock_seq_show(seq, v, srcp, 0,
1290                                         raw_seq_private(seq)->bucket);
1291         }
1292         return 0;
1293 }
1294 
1295 static const struct seq_operations raw6_seq_ops = {
1296         .start =        raw_seq_start,
1297         .next =         raw_seq_next,
1298         .stop =         raw_seq_stop,
1299         .show =         raw6_seq_show,
1300 };
1301 
1302 static int raw6_seq_open(struct inode *inode, struct file *file)
1303 {
1304         return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1305 }
1306 
1307 static const struct file_operations raw6_seq_fops = {
1308         .owner =        THIS_MODULE,
1309         .open =         raw6_seq_open,
1310         .read =         seq_read,
1311         .llseek =       seq_lseek,
1312         .release =      seq_release_net,
1313 };
1314 
1315 static int __net_init raw6_init_net(struct net *net)
1316 {
1317         if (!proc_create("raw6", S_IRUGO, net->proc_net, &raw6_seq_fops))
1318                 return -ENOMEM;
1319 
1320         return 0;
1321 }
1322 
1323 static void __net_exit raw6_exit_net(struct net *net)
1324 {
1325         remove_proc_entry("raw6", net->proc_net);
1326 }
1327 
1328 static struct pernet_operations raw6_net_ops = {
1329         .init = raw6_init_net,
1330         .exit = raw6_exit_net,
1331 };
1332 
1333 int __init raw6_proc_init(void)
1334 {
1335         return register_pernet_subsys(&raw6_net_ops);
1336 }
1337 
1338 void raw6_proc_exit(void)
1339 {
1340         unregister_pernet_subsys(&raw6_net_ops);
1341 }
1342 #endif  /* CONFIG_PROC_FS */
1343 
1344 /* Same as inet6_dgram_ops, sans udp_poll.  */
1345 const struct proto_ops inet6_sockraw_ops = {
1346         .family            = PF_INET6,
1347         .owner             = THIS_MODULE,
1348         .release           = inet6_release,
1349         .bind              = inet6_bind,
1350         .connect           = inet_dgram_connect,        /* ok           */
1351         .socketpair        = sock_no_socketpair,        /* a do nothing */
1352         .accept            = sock_no_accept,            /* a do nothing */
1353         .getname           = inet6_getname,
1354         .poll              = datagram_poll,             /* ok           */
1355         .ioctl             = inet6_ioctl,               /* must change  */
1356         .listen            = sock_no_listen,            /* ok           */
1357         .shutdown          = inet_shutdown,             /* ok           */
1358         .setsockopt        = sock_common_setsockopt,    /* ok           */
1359         .getsockopt        = sock_common_getsockopt,    /* ok           */
1360         .sendmsg           = inet_sendmsg,              /* ok           */
1361         .recvmsg           = sock_common_recvmsg,       /* ok           */
1362         .mmap              = sock_no_mmap,
1363         .sendpage          = sock_no_sendpage,
1364 #ifdef CONFIG_COMPAT
1365         .compat_setsockopt = compat_sock_common_setsockopt,
1366         .compat_getsockopt = compat_sock_common_getsockopt,
1367 #endif
1368 };
1369 
1370 static struct inet_protosw rawv6_protosw = {
1371         .type           = SOCK_RAW,
1372         .protocol       = IPPROTO_IP,   /* wild card */
1373         .prot           = &rawv6_prot,
1374         .ops            = &inet6_sockraw_ops,
1375         .flags          = INET_PROTOSW_REUSE,
1376 };
1377 
1378 int __init rawv6_init(void)
1379 {
1380         return inet6_register_protosw(&rawv6_protosw);
1381 }
1382 
1383 void rawv6_exit(void)
1384 {
1385         inet6_unregister_protosw(&rawv6_protosw);
1386 }
1387 

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