~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

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

Version: ~ [ linux-5.15-rc6 ] ~ [ linux-5.14.14 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.75 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.155 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.213 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.252 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.287 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.289 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 #define ICMPV6_HDRLEN   4       /* ICMPv6 header, RFC 4443 Section 2.1 */
 67 
 68 static struct raw_hashinfo raw_v6_hashinfo = {
 69         .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
 70 };
 71 
 72 static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
 73                 unsigned short num, const struct in6_addr *loc_addr,
 74                 const struct in6_addr *rmt_addr, int dif)
 75 {
 76         bool is_multicast = ipv6_addr_is_multicast(loc_addr);
 77 
 78         sk_for_each_from(sk)
 79                 if (inet_sk(sk)->inet_num == num) {
 80 
 81                         if (!net_eq(sock_net(sk), net))
 82                                 continue;
 83 
 84                         if (!ipv6_addr_any(&sk->sk_v6_daddr) &&
 85                             !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr))
 86                                 continue;
 87 
 88                         if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
 89                                 continue;
 90 
 91                         if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) {
 92                                 if (ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr))
 93                                         goto found;
 94                                 if (is_multicast &&
 95                                     inet6_mc_check(sk, loc_addr, rmt_addr))
 96                                         goto found;
 97                                 continue;
 98                         }
 99                         goto found;
100                 }
101         sk = NULL;
102 found:
103         return sk;
104 }
105 
106 /*
107  *      0 - deliver
108  *      1 - block
109  */
110 static int icmpv6_filter(const struct sock *sk, const struct sk_buff *skb)
111 {
112         struct icmp6hdr _hdr;
113         const struct icmp6hdr *hdr;
114 
115         /* We require only the four bytes of the ICMPv6 header, not any
116          * additional bytes of message body in "struct icmp6hdr".
117          */
118         hdr = skb_header_pointer(skb, skb_transport_offset(skb),
119                                  ICMPV6_HDRLEN, &_hdr);
120         if (hdr) {
121                 const __u32 *data = &raw6_sk(sk)->filter.data[0];
122                 unsigned int type = hdr->icmp6_type;
123 
124                 return (data[type >> 5] & (1U << (type & 31))) != 0;
125         }
126         return 1;
127 }
128 
129 #if IS_ENABLED(CONFIG_IPV6_MIP6)
130 typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb);
131 
132 static mh_filter_t __rcu *mh_filter __read_mostly;
133 
134 int rawv6_mh_filter_register(mh_filter_t filter)
135 {
136         rcu_assign_pointer(mh_filter, filter);
137         return 0;
138 }
139 EXPORT_SYMBOL(rawv6_mh_filter_register);
140 
141 int rawv6_mh_filter_unregister(mh_filter_t filter)
142 {
143         RCU_INIT_POINTER(mh_filter, NULL);
144         synchronize_rcu();
145         return 0;
146 }
147 EXPORT_SYMBOL(rawv6_mh_filter_unregister);
148 
149 #endif
150 
151 /*
152  *      demultiplex raw sockets.
153  *      (should consider queueing the skb in the sock receive_queue
154  *      without calling rawv6.c)
155  *
156  *      Caller owns SKB so we must make clones.
157  */
158 static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
159 {
160         const struct in6_addr *saddr;
161         const struct in6_addr *daddr;
162         struct sock *sk;
163         bool delivered = false;
164         __u8 hash;
165         struct net *net;
166 
167         saddr = &ipv6_hdr(skb)->saddr;
168         daddr = saddr + 1;
169 
170         hash = nexthdr & (RAW_HTABLE_SIZE - 1);
171 
172         read_lock(&raw_v6_hashinfo.lock);
173         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
174 
175         if (sk == NULL)
176                 goto out;
177 
178         net = dev_net(skb->dev);
179         sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
180 
181         while (sk) {
182                 int filtered;
183 
184                 delivered = true;
185                 switch (nexthdr) {
186                 case IPPROTO_ICMPV6:
187                         filtered = icmpv6_filter(sk, skb);
188                         break;
189 
190 #if IS_ENABLED(CONFIG_IPV6_MIP6)
191                 case IPPROTO_MH:
192                 {
193                         /* XXX: To validate MH only once for each packet,
194                          * this is placed here. It should be after checking
195                          * xfrm policy, however it doesn't. The checking xfrm
196                          * policy is placed in rawv6_rcv() because it is
197                          * required for each socket.
198                          */
199                         mh_filter_t *filter;
200 
201                         filter = rcu_dereference(mh_filter);
202                         filtered = filter ? (*filter)(sk, skb) : 0;
203                         break;
204                 }
205 #endif
206                 default:
207                         filtered = 0;
208                         break;
209                 }
210 
211                 if (filtered < 0)
212                         break;
213                 if (filtered == 0) {
214                         struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
215 
216                         /* Not releasing hash table! */
217                         if (clone) {
218                                 nf_reset(clone);
219                                 rawv6_rcv(sk, clone);
220                         }
221                 }
222                 sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
223                                      IP6CB(skb)->iif);
224         }
225 out:
226         read_unlock(&raw_v6_hashinfo.lock);
227         return delivered;
228 }
229 
230 bool raw6_local_deliver(struct sk_buff *skb, int nexthdr)
231 {
232         struct sock *raw_sk;
233 
234         raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (RAW_HTABLE_SIZE - 1)]);
235         if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
236                 raw_sk = NULL;
237 
238         return raw_sk != NULL;
239 }
240 
241 /* This cleans up af_inet6 a bit. -DaveM */
242 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
243 {
244         struct inet_sock *inet = inet_sk(sk);
245         struct ipv6_pinfo *np = inet6_sk(sk);
246         struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
247         __be32 v4addr = 0;
248         int addr_type;
249         int err;
250 
251         if (addr_len < SIN6_LEN_RFC2133)
252                 return -EINVAL;
253 
254         if (addr->sin6_family != AF_INET6)
255                 return -EINVAL;
256 
257         addr_type = ipv6_addr_type(&addr->sin6_addr);
258 
259         /* Raw sockets are IPv6 only */
260         if (addr_type == IPV6_ADDR_MAPPED)
261                 return -EADDRNOTAVAIL;
262 
263         lock_sock(sk);
264 
265         err = -EINVAL;
266         if (sk->sk_state != TCP_CLOSE)
267                 goto out;
268 
269         rcu_read_lock();
270         /* Check if the address belongs to the host. */
271         if (addr_type != IPV6_ADDR_ANY) {
272                 struct net_device *dev = NULL;
273 
274                 if (__ipv6_addr_needs_scope_id(addr_type)) {
275                         if (addr_len >= sizeof(struct sockaddr_in6) &&
276                             addr->sin6_scope_id) {
277                                 /* Override any existing binding, if another
278                                  * one is supplied by user.
279                                  */
280                                 sk->sk_bound_dev_if = addr->sin6_scope_id;
281                         }
282 
283                         /* Binding to link-local address requires an interface */
284                         if (!sk->sk_bound_dev_if)
285                                 goto out_unlock;
286 
287                         err = -ENODEV;
288                         dev = dev_get_by_index_rcu(sock_net(sk),
289                                                    sk->sk_bound_dev_if);
290                         if (!dev)
291                                 goto out_unlock;
292                 }
293 
294                 /* ipv4 addr of the socket is invalid.  Only the
295                  * unspecified and mapped address have a v4 equivalent.
296                  */
297                 v4addr = LOOPBACK4_IPV6;
298                 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
299                         err = -EADDRNOTAVAIL;
300                         if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
301                                            dev, 0)) {
302                                 goto out_unlock;
303                         }
304                 }
305         }
306 
307         inet->inet_rcv_saddr = inet->inet_saddr = v4addr;
308         sk->sk_v6_rcv_saddr = addr->sin6_addr;
309         if (!(addr_type & IPV6_ADDR_MULTICAST))
310                 np->saddr = addr->sin6_addr;
311         err = 0;
312 out_unlock:
313         rcu_read_unlock();
314 out:
315         release_sock(sk);
316         return err;
317 }
318 
319 static void rawv6_err(struct sock *sk, struct sk_buff *skb,
320                struct inet6_skb_parm *opt,
321                u8 type, u8 code, int offset, __be32 info)
322 {
323         struct inet_sock *inet = inet_sk(sk);
324         struct ipv6_pinfo *np = inet6_sk(sk);
325         int err;
326         int harderr;
327 
328         /* Report error on raw socket, if:
329            1. User requested recverr.
330            2. Socket is connected (otherwise the error indication
331               is useless without recverr and error is hard.
332          */
333         if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
334                 return;
335 
336         harderr = icmpv6_err_convert(type, code, &err);
337         if (type == ICMPV6_PKT_TOOBIG) {
338                 ip6_sk_update_pmtu(skb, sk, info);
339                 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
340         }
341         if (type == NDISC_REDIRECT) {
342                 ip6_sk_redirect(skb, sk);
343                 return;
344         }
345         if (np->recverr) {
346                 u8 *payload = skb->data;
347                 if (!inet->hdrincl)
348                         payload += offset;
349                 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
350         }
351 
352         if (np->recverr || harderr) {
353                 sk->sk_err = err;
354                 sk->sk_error_report(sk);
355         }
356 }
357 
358 void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
359                 u8 type, u8 code, int inner_offset, __be32 info)
360 {
361         struct sock *sk;
362         int hash;
363         const struct in6_addr *saddr, *daddr;
364         struct net *net;
365 
366         hash = nexthdr & (RAW_HTABLE_SIZE - 1);
367 
368         read_lock(&raw_v6_hashinfo.lock);
369         sk = sk_head(&raw_v6_hashinfo.ht[hash]);
370         if (sk != NULL) {
371                 /* Note: ipv6_hdr(skb) != skb->data */
372                 const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data;
373                 saddr = &ip6h->saddr;
374                 daddr = &ip6h->daddr;
375                 net = dev_net(skb->dev);
376 
377                 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
378                                                 IP6CB(skb)->iif))) {
379                         rawv6_err(sk, skb, NULL, type, code,
380                                         inner_offset, info);
381                         sk = sk_next(sk);
382                 }
383         }
384         read_unlock(&raw_v6_hashinfo.lock);
385 }
386 
387 static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb)
388 {
389         if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) &&
390             skb_checksum_complete(skb)) {
391                 atomic_inc(&sk->sk_drops);
392                 kfree_skb(skb);
393                 return NET_RX_DROP;
394         }
395 
396         /* Charge it to the socket. */
397         skb_dst_drop(skb);
398         if (sock_queue_rcv_skb(sk, skb) < 0) {
399                 kfree_skb(skb);
400                 return NET_RX_DROP;
401         }
402 
403         return 0;
404 }
405 
406 /*
407  *      This is next to useless...
408  *      if we demultiplex in network layer we don't need the extra call
409  *      just to queue the skb...
410  *      maybe we could have the network decide upon a hint if it
411  *      should call raw_rcv for demultiplexing
412  */
413 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
414 {
415         struct inet_sock *inet = inet_sk(sk);
416         struct raw6_sock *rp = raw6_sk(sk);
417 
418         if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
419                 atomic_inc(&sk->sk_drops);
420                 kfree_skb(skb);
421                 return NET_RX_DROP;
422         }
423 
424         if (!rp->checksum)
425                 skb->ip_summed = CHECKSUM_UNNECESSARY;
426 
427         if (skb->ip_summed == CHECKSUM_COMPLETE) {
428                 skb_postpull_rcsum(skb, skb_network_header(skb),
429                                    skb_network_header_len(skb));
430                 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
431                                      &ipv6_hdr(skb)->daddr,
432                                      skb->len, inet->inet_num, skb->csum))
433                         skb->ip_summed = CHECKSUM_UNNECESSARY;
434         }
435         if (!skb_csum_unnecessary(skb))
436                 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
437                                                          &ipv6_hdr(skb)->daddr,
438                                                          skb->len,
439                                                          inet->inet_num, 0));
440 
441         if (inet->hdrincl) {
442                 if (skb_checksum_complete(skb)) {
443                         atomic_inc(&sk->sk_drops);
444                         kfree_skb(skb);
445                         return NET_RX_DROP;
446                 }
447         }
448 
449         rawv6_rcv_skb(sk, skb);
450         return 0;
451 }
452 
453 
454 /*
455  *      This should be easy, if there is something there
456  *      we return it, otherwise we block.
457  */
458 
459 static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
460                   struct msghdr *msg, size_t len,
461                   int noblock, int flags, int *addr_len)
462 {
463         struct ipv6_pinfo *np = inet6_sk(sk);
464         DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
465         struct sk_buff *skb;
466         size_t copied;
467         int err;
468 
469         if (flags & MSG_OOB)
470                 return -EOPNOTSUPP;
471 
472         if (flags & MSG_ERRQUEUE)
473                 return ipv6_recv_error(sk, msg, len, addr_len);
474 
475         if (np->rxpmtu && np->rxopt.bits.rxpmtu)
476                 return ipv6_recv_rxpmtu(sk, msg, len, addr_len);
477 
478         skb = skb_recv_datagram(sk, flags, noblock, &err);
479         if (!skb)
480                 goto out;
481         if (ccs_socket_post_recvmsg_permission(sk, skb, flags)) {
482                 err = -EAGAIN; /* Hope less harmful than -EPERM. */
483                 goto out;
484         }
485 
486         copied = skb->len;
487         if (copied > len) {
488                 copied = len;
489                 msg->msg_flags |= MSG_TRUNC;
490         }
491 
492         if (skb_csum_unnecessary(skb)) {
493                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
494         } else if (msg->msg_flags&MSG_TRUNC) {
495                 if (__skb_checksum_complete(skb))
496                         goto csum_copy_err;
497                 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
498         } else {
499                 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
500                 if (err == -EINVAL)
501                         goto csum_copy_err;
502         }
503         if (err)
504                 goto out_free;
505 
506         /* Copy the address. */
507         if (sin6) {
508                 sin6->sin6_family = AF_INET6;
509                 sin6->sin6_port = 0;
510                 sin6->sin6_addr = ipv6_hdr(skb)->saddr;
511                 sin6->sin6_flowinfo = 0;
512                 sin6->sin6_scope_id = ipv6_iface_scope_id(&sin6->sin6_addr,
513                                                           IP6CB(skb)->iif);
514                 *addr_len = sizeof(*sin6);
515         }
516 
517         sock_recv_ts_and_drops(msg, sk, skb);
518 
519         if (np->rxopt.all)
520                 ip6_datagram_recv_ctl(sk, msg, skb);
521 
522         err = copied;
523         if (flags & MSG_TRUNC)
524                 err = skb->len;
525 
526 out_free:
527         skb_free_datagram(sk, skb);
528 out:
529         return err;
530 
531 csum_copy_err:
532         skb_kill_datagram(sk, skb, flags);
533 
534         /* Error for blocking case is chosen to masquerade
535            as some normal condition.
536          */
537         err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
538         goto out;
539 }
540 
541 static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
542                                      struct raw6_sock *rp)
543 {
544         struct sk_buff *skb;
545         int err = 0;
546         int offset;
547         int len;
548         int total_len;
549         __wsum tmp_csum;
550         __sum16 csum;
551 
552         if (!rp->checksum)
553                 goto send;
554 
555         if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
556                 goto out;
557 
558         offset = rp->offset;
559         total_len = inet_sk(sk)->cork.base.length;
560         if (offset >= total_len - 1) {
561                 err = -EINVAL;
562                 ip6_flush_pending_frames(sk);
563                 goto out;
564         }
565 
566         /* should be check HW csum miyazawa */
567         if (skb_queue_len(&sk->sk_write_queue) == 1) {
568                 /*
569                  * Only one fragment on the socket.
570                  */
571                 tmp_csum = skb->csum;
572         } else {
573                 struct sk_buff *csum_skb = NULL;
574                 tmp_csum = 0;
575 
576                 skb_queue_walk(&sk->sk_write_queue, skb) {
577                         tmp_csum = csum_add(tmp_csum, skb->csum);
578 
579                         if (csum_skb)
580                                 continue;
581 
582                         len = skb->len - skb_transport_offset(skb);
583                         if (offset >= len) {
584                                 offset -= len;
585                                 continue;
586                         }
587 
588                         csum_skb = skb;
589                 }
590 
591                 skb = csum_skb;
592         }
593 
594         offset += skb_transport_offset(skb);
595         err = skb_copy_bits(skb, offset, &csum, 2);
596         if (err < 0) {
597                 ip6_flush_pending_frames(sk);
598                 goto out;
599         }
600 
601         /* in case cksum was not initialized */
602         if (unlikely(csum))
603                 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
604 
605         csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr,
606                                total_len, fl6->flowi6_proto, tmp_csum);
607 
608         if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP)
609                 csum = CSUM_MANGLED_0;
610 
611         if (skb_store_bits(skb, offset, &csum, 2))
612                 BUG();
613 
614 send:
615         err = ip6_push_pending_frames(sk);
616 out:
617         return err;
618 }
619 
620 static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
621                         struct flowi6 *fl6, struct dst_entry **dstp,
622                         unsigned int flags)
623 {
624         struct ipv6_pinfo *np = inet6_sk(sk);
625         struct net *net = sock_net(sk);
626         struct ipv6hdr *iph;
627         struct sk_buff *skb;
628         int err;
629         struct rt6_info *rt = (struct rt6_info *)*dstp;
630         int hlen = LL_RESERVED_SPACE(rt->dst.dev);
631         int tlen = rt->dst.dev->needed_tailroom;
632 
633         if (length > rt->dst.dev->mtu) {
634                 ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu);
635                 return -EMSGSIZE;
636         }
637         if (flags&MSG_PROBE)
638                 goto out;
639 
640         skb = sock_alloc_send_skb(sk,
641                                   length + hlen + tlen + 15,
642                                   flags & MSG_DONTWAIT, &err);
643         if (skb == NULL)
644                 goto error;
645         skb_reserve(skb, hlen);
646 
647         skb->protocol = htons(ETH_P_IPV6);
648         skb->priority = sk->sk_priority;
649         skb->mark = sk->sk_mark;
650 
651         skb_put(skb, length);
652         skb_reset_network_header(skb);
653         iph = ipv6_hdr(skb);
654 
655         skb->ip_summed = CHECKSUM_NONE;
656 
657         skb->transport_header = skb->network_header;
658         err = memcpy_fromiovecend((void *)iph, from, 0, length);
659         if (err) {
660                 err = -EFAULT;
661                 kfree_skb(skb);
662                 goto error;
663         }
664 
665         skb_dst_set(skb, &rt->dst);
666         *dstp = NULL;
667 
668         /* Acquire rcu_read_lock() in case we need to use rt->rt6i_idev
669          * in the error path. Since skb has been freed, the dst could
670          * have been queued for deletion.
671          */
672         rcu_read_lock();
673         IP6_UPD_PO_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
674         err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL,
675                       rt->dst.dev, dst_output);
676         if (err > 0)
677                 err = net_xmit_errno(err);
678         if (err) {
679                 IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
680                 rcu_read_unlock();
681                 goto error_check;
682         }
683         rcu_read_unlock();
684 out:
685         return 0;
686 
687 error:
688         IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
689 error_check:
690         if (err == -ENOBUFS && !np->recverr)
691                 err = 0;
692         return err;
693 }
694 
695 static int rawv6_probe_proto_opt(struct flowi6 *fl6, struct msghdr *msg)
696 {
697         struct iovec *iov;
698         u8 __user *type = NULL;
699         u8 __user *code = NULL;
700         u8 len = 0;
701         int probed = 0;
702         int i;
703 
704         if (!msg->msg_iov)
705                 return 0;
706 
707         for (i = 0; i < msg->msg_iovlen; i++) {
708                 iov = &msg->msg_iov[i];
709                 if (!iov)
710                         continue;
711 
712                 switch (fl6->flowi6_proto) {
713                 case IPPROTO_ICMPV6:
714                         /* check if one-byte field is readable or not. */
715                         if (iov->iov_base && iov->iov_len < 1)
716                                 break;
717 
718                         if (!type) {
719                                 type = iov->iov_base;
720                                 /* check if code field is readable or not. */
721                                 if (iov->iov_len > 1)
722                                         code = type + 1;
723                         } else if (!code)
724                                 code = iov->iov_base;
725 
726                         if (type && code) {
727                                 if (get_user(fl6->fl6_icmp_type, type) ||
728                                     get_user(fl6->fl6_icmp_code, code))
729                                         return -EFAULT;
730                                 probed = 1;
731                         }
732                         break;
733                 case IPPROTO_MH:
734                         if (iov->iov_base && iov->iov_len < 1)
735                                 break;
736                         /* check if type field is readable or not. */
737                         if (iov->iov_len > 2 - len) {
738                                 u8 __user *p = iov->iov_base;
739                                 if (get_user(fl6->fl6_mh_type, &p[2 - len]))
740                                         return -EFAULT;
741                                 probed = 1;
742                         } else
743                                 len += iov->iov_len;
744 
745                         break;
746                 default:
747                         probed = 1;
748                         break;
749                 }
750                 if (probed)
751                         break;
752         }
753         return 0;
754 }
755 
756 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
757                    struct msghdr *msg, size_t len)
758 {
759         struct ipv6_txoptions *opt_to_free = NULL;
760         struct ipv6_txoptions opt_space;
761         DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
762         struct in6_addr *daddr, *final_p, final;
763         struct inet_sock *inet = inet_sk(sk);
764         struct ipv6_pinfo *np = inet6_sk(sk);
765         struct raw6_sock *rp = raw6_sk(sk);
766         struct ipv6_txoptions *opt = NULL;
767         struct ip6_flowlabel *flowlabel = NULL;
768         struct dst_entry *dst = NULL;
769         struct flowi6 fl6;
770         int addr_len = msg->msg_namelen;
771         int hlimit = -1;
772         int tclass = -1;
773         int dontfrag = -1;
774         u16 proto;
775         int err;
776 
777         /* Rough check on arithmetic overflow,
778            better check is made in ip6_append_data().
779          */
780         if (len > INT_MAX)
781                 return -EMSGSIZE;
782 
783         /* Mirror BSD error message compatibility */
784         if (msg->msg_flags & MSG_OOB)
785                 return -EOPNOTSUPP;
786 
787         /*
788          *      Get and verify the address.
789          */
790         memset(&fl6, 0, sizeof(fl6));
791 
792         fl6.flowi6_mark = sk->sk_mark;
793 
794         if (sin6) {
795                 if (addr_len < SIN6_LEN_RFC2133)
796                         return -EINVAL;
797 
798                 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
799                         return -EAFNOSUPPORT;
800 
801                 /* port is the proto value [0..255] carried in nexthdr */
802                 proto = ntohs(sin6->sin6_port);
803 
804                 if (!proto)
805                         proto = inet->inet_num;
806                 else if (proto != inet->inet_num)
807                         return -EINVAL;
808 
809                 if (proto > 255)
810                         return -EINVAL;
811 
812                 daddr = &sin6->sin6_addr;
813                 if (np->sndflow) {
814                         fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
815                         if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
816                                 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
817                                 if (flowlabel == NULL)
818                                         return -EINVAL;
819                         }
820                 }
821 
822                 /*
823                  * Otherwise it will be difficult to maintain
824                  * sk->sk_dst_cache.
825                  */
826                 if (sk->sk_state == TCP_ESTABLISHED &&
827                     ipv6_addr_equal(daddr, &sk->sk_v6_daddr))
828                         daddr = &sk->sk_v6_daddr;
829 
830                 if (addr_len >= sizeof(struct sockaddr_in6) &&
831                     sin6->sin6_scope_id &&
832                     __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr)))
833                         fl6.flowi6_oif = sin6->sin6_scope_id;
834         } else {
835                 if (sk->sk_state != TCP_ESTABLISHED)
836                         return -EDESTADDRREQ;
837 
838                 proto = inet->inet_num;
839                 daddr = &sk->sk_v6_daddr;
840                 fl6.flowlabel = np->flow_label;
841         }
842 
843         if (fl6.flowi6_oif == 0)
844                 fl6.flowi6_oif = sk->sk_bound_dev_if;
845 
846         if (msg->msg_controllen) {
847                 opt = &opt_space;
848                 memset(opt, 0, sizeof(struct ipv6_txoptions));
849                 opt->tot_len = sizeof(struct ipv6_txoptions);
850 
851                 err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt,
852                                             &hlimit, &tclass, &dontfrag);
853                 if (err < 0) {
854                         fl6_sock_release(flowlabel);
855                         return err;
856                 }
857                 if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
858                         flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
859                         if (flowlabel == NULL)
860                                 return -EINVAL;
861                 }
862                 if (!(opt->opt_nflen|opt->opt_flen))
863                         opt = NULL;
864         }
865         if (!opt) {
866                 opt = txopt_get(np);
867                 opt_to_free = opt;
868                 }
869         if (flowlabel)
870                 opt = fl6_merge_options(&opt_space, flowlabel, opt);
871         opt = ipv6_fixup_options(&opt_space, opt);
872 
873         fl6.flowi6_proto = proto;
874         err = rawv6_probe_proto_opt(&fl6, msg);
875         if (err)
876                 goto out;
877 
878         if (!ipv6_addr_any(daddr))
879                 fl6.daddr = *daddr;
880         else
881                 fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
882         if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
883                 fl6.saddr = np->saddr;
884 
885         final_p = fl6_update_dst(&fl6, opt, &final);
886 
887         if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
888                 fl6.flowi6_oif = np->mcast_oif;
889         else if (!fl6.flowi6_oif)
890                 fl6.flowi6_oif = np->ucast_oif;
891         security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
892 
893         dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
894         if (IS_ERR(dst)) {
895                 err = PTR_ERR(dst);
896                 goto out;
897         }
898         if (hlimit < 0)
899                 hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
900 
901         if (tclass < 0)
902                 tclass = np->tclass;
903 
904         if (dontfrag < 0)
905                 dontfrag = np->dontfrag;
906 
907         if (msg->msg_flags&MSG_CONFIRM)
908                 goto do_confirm;
909 
910 back_from_confirm:
911         if (inet->hdrincl)
912                 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl6, &dst, msg->msg_flags);
913         else {
914                 lock_sock(sk);
915                 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
916                         len, 0, hlimit, tclass, opt, &fl6, (struct rt6_info*)dst,
917                         msg->msg_flags, dontfrag);
918 
919                 if (err)
920                         ip6_flush_pending_frames(sk);
921                 else if (!(msg->msg_flags & MSG_MORE))
922                         err = rawv6_push_pending_frames(sk, &fl6, rp);
923                 release_sock(sk);
924         }
925 done:
926         dst_release(dst);
927 out:
928         fl6_sock_release(flowlabel);
929         txopt_put(opt_to_free);
930         return err<0?err:len;
931 do_confirm:
932         dst_confirm(dst);
933         if (!(msg->msg_flags & MSG_PROBE) || len)
934                 goto back_from_confirm;
935         err = 0;
936         goto done;
937 }
938 
939 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
940                                char __user *optval, int optlen)
941 {
942         switch (optname) {
943         case ICMPV6_FILTER:
944                 if (optlen > sizeof(struct icmp6_filter))
945                         optlen = sizeof(struct icmp6_filter);
946                 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
947                         return -EFAULT;
948                 return 0;
949         default:
950                 return -ENOPROTOOPT;
951         }
952 
953         return 0;
954 }
955 
956 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
957                                char __user *optval, int __user *optlen)
958 {
959         int len;
960 
961         switch (optname) {
962         case ICMPV6_FILTER:
963                 if (get_user(len, optlen))
964                         return -EFAULT;
965                 if (len < 0)
966                         return -EINVAL;
967                 if (len > sizeof(struct icmp6_filter))
968                         len = sizeof(struct icmp6_filter);
969                 if (put_user(len, optlen))
970                         return -EFAULT;
971                 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
972                         return -EFAULT;
973                 return 0;
974         default:
975                 return -ENOPROTOOPT;
976         }
977 
978         return 0;
979 }
980 
981 
982 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
983                             char __user *optval, unsigned int optlen)
984 {
985         struct raw6_sock *rp = raw6_sk(sk);
986         int val;
987 
988         if (get_user(val, (int __user *)optval))
989                 return -EFAULT;
990 
991         switch (optname) {
992         case IPV6_CHECKSUM:
993                 if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
994                     level == IPPROTO_IPV6) {
995                         /*
996                          * RFC3542 tells that IPV6_CHECKSUM socket
997                          * option in the IPPROTO_IPV6 level is not
998                          * allowed on ICMPv6 sockets.
999                          * If you want to set it, use IPPROTO_RAW
1000                          * level IPV6_CHECKSUM socket option
1001                          * (Linux extension).
1002                          */
1003                         return -EINVAL;
1004                 }
1005 
1006                 /* You may get strange result with a positive odd offset;
1007                    RFC2292bis agrees with me. */
1008                 if (val > 0 && (val&1))
1009                         return -EINVAL;
1010                 if (val < 0) {
1011                         rp->checksum = 0;
1012                 } else {
1013                         rp->checksum = 1;
1014                         rp->offset = val;
1015                 }
1016 
1017                 return 0;
1018 
1019         default:
1020                 return -ENOPROTOOPT;
1021         }
1022 }
1023 
1024 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1025                           char __user *optval, unsigned int optlen)
1026 {
1027         switch (level) {
1028         case SOL_RAW:
1029                 break;
1030 
1031         case SOL_ICMPV6:
1032                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1033                         return -EOPNOTSUPP;
1034                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1035         case SOL_IPV6:
1036                 if (optname == IPV6_CHECKSUM)
1037                         break;
1038         default:
1039                 return ipv6_setsockopt(sk, level, optname, optval, optlen);
1040         }
1041 
1042         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1043 }
1044 
1045 #ifdef CONFIG_COMPAT
1046 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1047                                    char __user *optval, unsigned int optlen)
1048 {
1049         switch (level) {
1050         case SOL_RAW:
1051                 break;
1052         case SOL_ICMPV6:
1053                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1054                         return -EOPNOTSUPP;
1055                 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1056         case SOL_IPV6:
1057                 if (optname == IPV6_CHECKSUM)
1058                         break;
1059         default:
1060                 return compat_ipv6_setsockopt(sk, level, optname,
1061                                               optval, optlen);
1062         }
1063         return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1064 }
1065 #endif
1066 
1067 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1068                             char __user *optval, int __user *optlen)
1069 {
1070         struct raw6_sock *rp = raw6_sk(sk);
1071         int val, len;
1072 
1073         if (get_user(len,optlen))
1074                 return -EFAULT;
1075 
1076         switch (optname) {
1077         case IPV6_CHECKSUM:
1078                 /*
1079                  * We allow getsockopt() for IPPROTO_IPV6-level
1080                  * IPV6_CHECKSUM socket option on ICMPv6 sockets
1081                  * since RFC3542 is silent about it.
1082                  */
1083                 if (rp->checksum == 0)
1084                         val = -1;
1085                 else
1086                         val = rp->offset;
1087                 break;
1088 
1089         default:
1090                 return -ENOPROTOOPT;
1091         }
1092 
1093         len = min_t(unsigned int, sizeof(int), len);
1094 
1095         if (put_user(len, optlen))
1096                 return -EFAULT;
1097         if (copy_to_user(optval,&val,len))
1098                 return -EFAULT;
1099         return 0;
1100 }
1101 
1102 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1103                           char __user *optval, int __user *optlen)
1104 {
1105         switch (level) {
1106         case SOL_RAW:
1107                 break;
1108 
1109         case SOL_ICMPV6:
1110                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1111                         return -EOPNOTSUPP;
1112                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1113         case SOL_IPV6:
1114                 if (optname == IPV6_CHECKSUM)
1115                         break;
1116         default:
1117                 return ipv6_getsockopt(sk, level, optname, optval, optlen);
1118         }
1119 
1120         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1121 }
1122 
1123 #ifdef CONFIG_COMPAT
1124 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1125                                    char __user *optval, int __user *optlen)
1126 {
1127         switch (level) {
1128         case SOL_RAW:
1129                 break;
1130         case SOL_ICMPV6:
1131                 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1132                         return -EOPNOTSUPP;
1133                 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1134         case SOL_IPV6:
1135                 if (optname == IPV6_CHECKSUM)
1136                         break;
1137         default:
1138                 return compat_ipv6_getsockopt(sk, level, optname,
1139                                               optval, optlen);
1140         }
1141         return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1142 }
1143 #endif
1144 
1145 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1146 {
1147         switch (cmd) {
1148         case SIOCOUTQ: {
1149                 int amount = sk_wmem_alloc_get(sk);
1150 
1151                 return put_user(amount, (int __user *)arg);
1152         }
1153         case SIOCINQ: {
1154                 struct sk_buff *skb;
1155                 int amount = 0;
1156 
1157                 spin_lock_bh(&sk->sk_receive_queue.lock);
1158                 skb = skb_peek(&sk->sk_receive_queue);
1159                 if (skb != NULL)
1160                         amount = skb_tail_pointer(skb) -
1161                                 skb_transport_header(skb);
1162                 spin_unlock_bh(&sk->sk_receive_queue.lock);
1163                 return put_user(amount, (int __user *)arg);
1164         }
1165 
1166         default:
1167 #ifdef CONFIG_IPV6_MROUTE
1168                 return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1169 #else
1170                 return -ENOIOCTLCMD;
1171 #endif
1172         }
1173 }
1174 
1175 #ifdef CONFIG_COMPAT
1176 static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
1177 {
1178         switch (cmd) {
1179         case SIOCOUTQ:
1180         case SIOCINQ:
1181                 return -ENOIOCTLCMD;
1182         default:
1183 #ifdef CONFIG_IPV6_MROUTE
1184                 return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
1185 #else
1186                 return -ENOIOCTLCMD;
1187 #endif
1188         }
1189 }
1190 #endif
1191 
1192 static void rawv6_close(struct sock *sk, long timeout)
1193 {
1194         if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1195                 ip6_ra_control(sk, -1);
1196         ip6mr_sk_done(sk);
1197         sk_common_release(sk);
1198 }
1199 
1200 static void raw6_destroy(struct sock *sk)
1201 {
1202         lock_sock(sk);
1203         ip6_flush_pending_frames(sk);
1204         release_sock(sk);
1205 
1206         inet6_destroy_sock(sk);
1207 }
1208 
1209 static int rawv6_init_sk(struct sock *sk)
1210 {
1211         struct raw6_sock *rp = raw6_sk(sk);
1212 
1213         switch (inet_sk(sk)->inet_num) {
1214         case IPPROTO_ICMPV6:
1215                 rp->checksum = 1;
1216                 rp->offset   = 2;
1217                 break;
1218         case IPPROTO_MH:
1219                 rp->checksum = 1;
1220                 rp->offset   = 4;
1221                 break;
1222         default:
1223                 break;
1224         }
1225         return 0;
1226 }
1227 
1228 struct proto rawv6_prot = {
1229         .name              = "RAWv6",
1230         .owner             = THIS_MODULE,
1231         .close             = rawv6_close,
1232         .destroy           = raw6_destroy,
1233         .connect           = ip6_datagram_connect_v6_only,
1234         .disconnect        = udp_disconnect,
1235         .ioctl             = rawv6_ioctl,
1236         .init              = rawv6_init_sk,
1237         .setsockopt        = rawv6_setsockopt,
1238         .getsockopt        = rawv6_getsockopt,
1239         .sendmsg           = rawv6_sendmsg,
1240         .recvmsg           = rawv6_recvmsg,
1241         .bind              = rawv6_bind,
1242         .backlog_rcv       = rawv6_rcv_skb,
1243         .hash              = raw_hash_sk,
1244         .unhash            = raw_unhash_sk,
1245         .obj_size          = sizeof(struct raw6_sock),
1246         .h.raw_hash        = &raw_v6_hashinfo,
1247 #ifdef CONFIG_COMPAT
1248         .compat_setsockopt = compat_rawv6_setsockopt,
1249         .compat_getsockopt = compat_rawv6_getsockopt,
1250         .compat_ioctl      = compat_rawv6_ioctl,
1251 #endif
1252 };
1253 
1254 #ifdef CONFIG_PROC_FS
1255 static int raw6_seq_show(struct seq_file *seq, void *v)
1256 {
1257         if (v == SEQ_START_TOKEN) {
1258                 seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
1259         } else {
1260                 struct sock *sp = v;
1261                 __u16 srcp  = inet_sk(sp)->inet_num;
1262                 ip6_dgram_sock_seq_show(seq, v, srcp, 0,
1263                                         raw_seq_private(seq)->bucket);
1264         }
1265         return 0;
1266 }
1267 
1268 static const struct seq_operations raw6_seq_ops = {
1269         .start =        raw_seq_start,
1270         .next =         raw_seq_next,
1271         .stop =         raw_seq_stop,
1272         .show =         raw6_seq_show,
1273 };
1274 
1275 static int raw6_seq_open(struct inode *inode, struct file *file)
1276 {
1277         return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1278 }
1279 
1280 static const struct file_operations raw6_seq_fops = {
1281         .owner =        THIS_MODULE,
1282         .open =         raw6_seq_open,
1283         .read =         seq_read,
1284         .llseek =       seq_lseek,
1285         .release =      seq_release_net,
1286 };
1287 
1288 static int __net_init raw6_init_net(struct net *net)
1289 {
1290         if (!proc_create("raw6", S_IRUGO, net->proc_net, &raw6_seq_fops))
1291                 return -ENOMEM;
1292 
1293         return 0;
1294 }
1295 
1296 static void __net_exit raw6_exit_net(struct net *net)
1297 {
1298         remove_proc_entry("raw6", net->proc_net);
1299 }
1300 
1301 static struct pernet_operations raw6_net_ops = {
1302         .init = raw6_init_net,
1303         .exit = raw6_exit_net,
1304 };
1305 
1306 int __init raw6_proc_init(void)
1307 {
1308         return register_pernet_subsys(&raw6_net_ops);
1309 }
1310 
1311 void raw6_proc_exit(void)
1312 {
1313         unregister_pernet_subsys(&raw6_net_ops);
1314 }
1315 #endif  /* CONFIG_PROC_FS */
1316 
1317 /* Same as inet6_dgram_ops, sans udp_poll.  */
1318 const struct proto_ops inet6_sockraw_ops = {
1319         .family            = PF_INET6,
1320         .owner             = THIS_MODULE,
1321         .release           = inet6_release,
1322         .bind              = inet6_bind,
1323         .connect           = inet_dgram_connect,        /* ok           */
1324         .socketpair        = sock_no_socketpair,        /* a do nothing */
1325         .accept            = sock_no_accept,            /* a do nothing */
1326         .getname           = inet6_getname,
1327         .poll              = datagram_poll,             /* ok           */
1328         .ioctl             = inet6_ioctl,               /* must change  */
1329         .listen            = sock_no_listen,            /* ok           */
1330         .shutdown          = inet_shutdown,             /* ok           */
1331         .setsockopt        = sock_common_setsockopt,    /* ok           */
1332         .getsockopt        = sock_common_getsockopt,    /* ok           */
1333         .sendmsg           = inet_sendmsg,              /* ok           */
1334         .recvmsg           = sock_common_recvmsg,       /* ok           */
1335         .mmap              = sock_no_mmap,
1336         .sendpage          = sock_no_sendpage,
1337 #ifdef CONFIG_COMPAT
1338         .compat_setsockopt = compat_sock_common_setsockopt,
1339         .compat_getsockopt = compat_sock_common_getsockopt,
1340 #endif
1341 };
1342 
1343 static struct inet_protosw rawv6_protosw = {
1344         .type           = SOCK_RAW,
1345         .protocol       = IPPROTO_IP,   /* wild card */
1346         .prot           = &rawv6_prot,
1347         .ops            = &inet6_sockraw_ops,
1348         .flags          = INET_PROTOSW_REUSE,
1349 };
1350 
1351 int __init rawv6_init(void)
1352 {
1353         int ret;
1354 
1355         ret = inet6_register_protosw(&rawv6_protosw);
1356         if (ret)
1357                 goto out;
1358 out:
1359         return ret;
1360 }
1361 
1362 void rawv6_exit(void)
1363 {
1364         inet6_unregister_protosw(&rawv6_protosw);
1365 }
1366 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp