1 /*
2 * RAW sockets for IPv6
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <roque@di.fc.ul.pt>
7 *
8 * Adapted from linux/net/ipv4/raw.c
9 *
10 * Fixes:
11 * Hideaki YOSHIFUJI : sin6_scope_id support
12 * YOSHIFUJI,H.@USAGI : raw checksum (RFC2292(bis) compliance)
13 * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version.
19 */
20
21 #include <linux/errno.h>
22 #include <linux/types.h>
23 #include <linux/socket.h>
24 #include <linux/slab.h>
25 #include <linux/sockios.h>
26 #include <linux/net.h>
27 #include <linux/in6.h>
28 #include <linux/netdevice.h>
29 #include <linux/if_arp.h>
30 #include <linux/icmpv6.h>
31 #include <linux/netfilter.h>
32 #include <linux/netfilter_ipv6.h>
33 #include <linux/skbuff.h>
34 #include <linux/compat.h>
35 #include <asm/uaccess.h>
36 #include <asm/ioctls.h>
37
38 #include <net/net_namespace.h>
39 #include <net/ip.h>
40 #include <net/sock.h>
41 #include <net/snmp.h>
42
43 #include <net/ipv6.h>
44 #include <net/ndisc.h>
45 #include <net/protocol.h>
46 #include <net/ip6_route.h>
47 #include <net/ip6_checksum.h>
48 #include <net/addrconf.h>
49 #include <net/transp_v6.h>
50 #include <net/udp.h>
51 #include <net/inet_common.h>
52 #include <net/tcp_states.h>
53 #if IS_ENABLED(CONFIG_IPV6_MIP6)
54 #include <net/mip6.h>
55 #endif
56 #include <linux/mroute6.h>
57
58 #include <net/raw.h>
59 #include <net/rawv6.h>
60 #include <net/xfrm.h>
61
62 #include <linux/proc_fs.h>
63 #include <linux/seq_file.h>
64 #include <linux/export.h>
65
66 static struct raw_hashinfo raw_v6_hashinfo = {
67 .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
68 };
69
__raw_v6_lookup(struct net * net,struct sock * sk,unsigned short num,const struct in6_addr * loc_addr,const struct in6_addr * rmt_addr,int dif)70 static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
71 unsigned short num, const struct in6_addr *loc_addr,
72 const struct in6_addr *rmt_addr, int dif)
73 {
74 bool is_multicast = ipv6_addr_is_multicast(loc_addr);
75
76 sk_for_each_from(sk)
77 if (inet_sk(sk)->inet_num == num) {
78 struct ipv6_pinfo *np = inet6_sk(sk);
79
80 if (!net_eq(sock_net(sk), net))
81 continue;
82
83 if (!ipv6_addr_any(&np->daddr) &&
84 !ipv6_addr_equal(&np->daddr, rmt_addr))
85 continue;
86
87 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
88 continue;
89
90 if (!ipv6_addr_any(&np->rcv_saddr)) {
91 if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
92 goto found;
93 if (is_multicast &&
94 inet6_mc_check(sk, loc_addr, rmt_addr))
95 goto found;
96 continue;
97 }
98 goto found;
99 }
100 sk = NULL;
101 found:
102 return sk;
103 }
104
105 /*
106 * 0 - deliver
107 * 1 - block
108 */
icmpv6_filter(const struct sock * sk,const struct sk_buff * skb)109 static int icmpv6_filter(const struct sock *sk, const struct sk_buff *skb)
110 {
111 struct icmp6hdr *_hdr;
112 const struct icmp6hdr *hdr;
113
114 hdr = skb_header_pointer(skb, skb_transport_offset(skb),
115 sizeof(_hdr), &_hdr);
116 if (hdr) {
117 const __u32 *data = &raw6_sk(sk)->filter.data[0];
118 unsigned int type = hdr->icmp6_type;
119
120 return (data[type >> 5] & (1U << (type & 31))) != 0;
121 }
122 return 1;
123 }
124
125 #if IS_ENABLED(CONFIG_IPV6_MIP6)
126 typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb);
127
128 static mh_filter_t __rcu *mh_filter __read_mostly;
129
rawv6_mh_filter_register(mh_filter_t filter)130 int rawv6_mh_filter_register(mh_filter_t filter)
131 {
132 rcu_assign_pointer(mh_filter, filter);
133 return 0;
134 }
135 EXPORT_SYMBOL(rawv6_mh_filter_register);
136
rawv6_mh_filter_unregister(mh_filter_t filter)137 int rawv6_mh_filter_unregister(mh_filter_t filter)
138 {
139 RCU_INIT_POINTER(mh_filter, NULL);
140 synchronize_rcu();
141 return 0;
142 }
143 EXPORT_SYMBOL(rawv6_mh_filter_unregister);
144
145 #endif
146
147 /*
148 * demultiplex raw sockets.
149 * (should consider queueing the skb in the sock receive_queue
150 * without calling rawv6.c)
151 *
152 * Caller owns SKB so we must make clones.
153 */
ipv6_raw_deliver(struct sk_buff * skb,int nexthdr)154 static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
155 {
156 const struct in6_addr *saddr;
157 const struct in6_addr *daddr;
158 struct sock *sk;
159 bool delivered = false;
160 __u8 hash;
161 struct net *net;
162
163 saddr = &ipv6_hdr(skb)->saddr;
164 daddr = saddr + 1;
165
166 hash = nexthdr & (RAW_HTABLE_SIZE - 1);
167
168 read_lock(&raw_v6_hashinfo.lock);
169 sk = sk_head(&raw_v6_hashinfo.ht[hash]);
170
171 if (sk == NULL)
172 goto out;
173
174 net = dev_net(skb->dev);
175 sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
176
177 while (sk) {
178 int filtered;
179
180 delivered = true;
181 switch (nexthdr) {
182 case IPPROTO_ICMPV6:
183 filtered = icmpv6_filter(sk, skb);
184 break;
185
186 #if IS_ENABLED(CONFIG_IPV6_MIP6)
187 case IPPROTO_MH:
188 {
189 /* XXX: To validate MH only once for each packet,
190 * this is placed here. It should be after checking
191 * xfrm policy, however it doesn't. The checking xfrm
192 * policy is placed in rawv6_rcv() because it is
193 * required for each socket.
194 */
195 mh_filter_t *filter;
196
197 filter = rcu_dereference(mh_filter);
198 filtered = filter ? (*filter)(sk, skb) : 0;
199 break;
200 }
201 #endif
202 default:
203 filtered = 0;
204 break;
205 }
206
207 if (filtered < 0)
208 break;
209 if (filtered == 0) {
210 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
211
212 /* Not releasing hash table! */
213 if (clone) {
214 nf_reset(clone);
215 rawv6_rcv(sk, clone);
216 }
217 }
218 sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
219 IP6CB(skb)->iif);
220 }
221 out:
222 read_unlock(&raw_v6_hashinfo.lock);
223 return delivered;
224 }
225
raw6_local_deliver(struct sk_buff * skb,int nexthdr)226 bool raw6_local_deliver(struct sk_buff *skb, int nexthdr)
227 {
228 struct sock *raw_sk;
229
230 raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (RAW_HTABLE_SIZE - 1)]);
231 if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
232 raw_sk = NULL;
233
234 return raw_sk != NULL;
235 }
236
237 /* This cleans up af_inet6 a bit. -DaveM */
rawv6_bind(struct sock * sk,struct sockaddr * uaddr,int addr_len)238 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
239 {
240 struct inet_sock *inet = inet_sk(sk);
241 struct ipv6_pinfo *np = inet6_sk(sk);
242 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
243 __be32 v4addr = 0;
244 int addr_type;
245 int err;
246
247 if (addr_len < SIN6_LEN_RFC2133)
248 return -EINVAL;
249 addr_type = ipv6_addr_type(&addr->sin6_addr);
250
251 /* Raw sockets are IPv6 only */
252 if (addr_type == IPV6_ADDR_MAPPED)
253 return -EADDRNOTAVAIL;
254
255 lock_sock(sk);
256
257 err = -EINVAL;
258 if (sk->sk_state != TCP_CLOSE)
259 goto out;
260
261 rcu_read_lock();
262 /* Check if the address belongs to the host. */
263 if (addr_type != IPV6_ADDR_ANY) {
264 struct net_device *dev = NULL;
265
266 if (__ipv6_addr_needs_scope_id(addr_type)) {
267 if (addr_len >= sizeof(struct sockaddr_in6) &&
268 addr->sin6_scope_id) {
269 /* Override any existing binding, if another
270 * one is supplied by user.
271 */
272 sk->sk_bound_dev_if = addr->sin6_scope_id;
273 }
274
275 /* Binding to link-local address requires an interface */
276 if (!sk->sk_bound_dev_if)
277 goto out_unlock;
278
279 err = -ENODEV;
280 dev = dev_get_by_index_rcu(sock_net(sk),
281 sk->sk_bound_dev_if);
282 if (!dev)
283 goto out_unlock;
284 }
285
286 /* ipv4 addr of the socket is invalid. Only the
287 * unspecified and mapped address have a v4 equivalent.
288 */
289 v4addr = LOOPBACK4_IPV6;
290 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
291 err = -EADDRNOTAVAIL;
292 if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
293 dev, 0)) {
294 goto out_unlock;
295 }
296 }
297 }
298
299 inet->inet_rcv_saddr = inet->inet_saddr = v4addr;
300 np->rcv_saddr = addr->sin6_addr;
301 if (!(addr_type & IPV6_ADDR_MULTICAST))
302 np->saddr = addr->sin6_addr;
303 err = 0;
304 out_unlock:
305 rcu_read_unlock();
306 out:
307 release_sock(sk);
308 return err;
309 }
310
rawv6_err(struct sock * sk,struct sk_buff * skb,struct inet6_skb_parm * opt,u8 type,u8 code,int offset,__be32 info)311 static void rawv6_err(struct sock *sk, struct sk_buff *skb,
312 struct inet6_skb_parm *opt,
313 u8 type, u8 code, int offset, __be32 info)
314 {
315 struct inet_sock *inet = inet_sk(sk);
316 struct ipv6_pinfo *np = inet6_sk(sk);
317 int err;
318 int harderr;
319
320 /* Report error on raw socket, if:
321 1. User requested recverr.
322 2. Socket is connected (otherwise the error indication
323 is useless without recverr and error is hard.
324 */
325 if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
326 return;
327
328 harderr = icmpv6_err_convert(type, code, &err);
329 if (type == ICMPV6_PKT_TOOBIG) {
330 ip6_sk_update_pmtu(skb, sk, info);
331 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
332 }
333 if (type == NDISC_REDIRECT)
334 ip6_sk_redirect(skb, sk);
335 if (np->recverr) {
336 u8 *payload = skb->data;
337 if (!inet->hdrincl)
338 payload += offset;
339 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
340 }
341
342 if (np->recverr || harderr) {
343 sk->sk_err = err;
344 sk->sk_error_report(sk);
345 }
346 }
347
raw6_icmp_error(struct sk_buff * skb,int nexthdr,u8 type,u8 code,int inner_offset,__be32 info)348 void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
349 u8 type, u8 code, int inner_offset, __be32 info)
350 {
351 struct sock *sk;
352 int hash;
353 const struct in6_addr *saddr, *daddr;
354 struct net *net;
355
356 hash = nexthdr & (RAW_HTABLE_SIZE - 1);
357
358 read_lock(&raw_v6_hashinfo.lock);
359 sk = sk_head(&raw_v6_hashinfo.ht[hash]);
360 if (sk != NULL) {
361 /* Note: ipv6_hdr(skb) != skb->data */
362 const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data;
363 saddr = &ip6h->saddr;
364 daddr = &ip6h->daddr;
365 net = dev_net(skb->dev);
366
367 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
368 IP6CB(skb)->iif))) {
369 rawv6_err(sk, skb, NULL, type, code,
370 inner_offset, info);
371 sk = sk_next(sk);
372 }
373 }
374 read_unlock(&raw_v6_hashinfo.lock);
375 }
376
rawv6_rcv_skb(struct sock * sk,struct sk_buff * skb)377 static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb)
378 {
379 if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) &&
380 skb_checksum_complete(skb)) {
381 atomic_inc(&sk->sk_drops);
382 kfree_skb(skb);
383 return NET_RX_DROP;
384 }
385
386 /* Charge it to the socket. */
387 skb_dst_drop(skb);
388 if (sock_queue_rcv_skb(sk, skb) < 0) {
389 kfree_skb(skb);
390 return NET_RX_DROP;
391 }
392
393 return 0;
394 }
395
396 /*
397 * This is next to useless...
398 * if we demultiplex in network layer we don't need the extra call
399 * just to queue the skb...
400 * maybe we could have the network decide upon a hint if it
401 * should call raw_rcv for demultiplexing
402 */
rawv6_rcv(struct sock * sk,struct sk_buff * skb)403 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
404 {
405 struct inet_sock *inet = inet_sk(sk);
406 struct raw6_sock *rp = raw6_sk(sk);
407
408 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
409 atomic_inc(&sk->sk_drops);
410 kfree_skb(skb);
411 return NET_RX_DROP;
412 }
413
414 if (!rp->checksum)
415 skb->ip_summed = CHECKSUM_UNNECESSARY;
416
417 if (skb->ip_summed == CHECKSUM_COMPLETE) {
418 skb_postpull_rcsum(skb, skb_network_header(skb),
419 skb_network_header_len(skb));
420 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
421 &ipv6_hdr(skb)->daddr,
422 skb->len, inet->inet_num, skb->csum))
423 skb->ip_summed = CHECKSUM_UNNECESSARY;
424 }
425 if (!skb_csum_unnecessary(skb))
426 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
427 &ipv6_hdr(skb)->daddr,
428 skb->len,
429 inet->inet_num, 0));
430
431 if (inet->hdrincl) {
432 if (skb_checksum_complete(skb)) {
433 atomic_inc(&sk->sk_drops);
434 kfree_skb(skb);
435 return NET_RX_DROP;
436 }
437 }
438
439 rawv6_rcv_skb(sk, skb);
440 return 0;
441 }
442
443
444 /*
445 * This should be easy, if there is something there
446 * we return it, otherwise we block.
447 */
448
rawv6_recvmsg(struct kiocb * iocb,struct sock * sk,struct msghdr * msg,size_t len,int noblock,int flags,int * addr_len)449 static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
450 struct msghdr *msg, size_t len,
451 int noblock, int flags, int *addr_len)
452 {
453 struct ipv6_pinfo *np = inet6_sk(sk);
454 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
455 struct sk_buff *skb;
456 size_t copied;
457 int err;
458
459 if (flags & MSG_OOB)
460 return -EOPNOTSUPP;
461
462 if (flags & MSG_ERRQUEUE)
463 return ipv6_recv_error(sk, msg, len, addr_len);
464
465 if (np->rxpmtu && np->rxopt.bits.rxpmtu)
466 return ipv6_recv_rxpmtu(sk, msg, len, addr_len);
467
468 skb = skb_recv_datagram(sk, flags, noblock, &err);
469 if (!skb)
470 goto out;
471
472 copied = skb->len;
473 if (copied > len) {
474 copied = len;
475 msg->msg_flags |= MSG_TRUNC;
476 }
477
478 if (skb_csum_unnecessary(skb)) {
479 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
480 } else if (msg->msg_flags&MSG_TRUNC) {
481 if (__skb_checksum_complete(skb))
482 goto csum_copy_err;
483 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
484 } else {
485 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
486 if (err == -EINVAL)
487 goto csum_copy_err;
488 }
489 if (err)
490 goto out_free;
491
492 /* Copy the address. */
493 if (sin6) {
494 sin6->sin6_family = AF_INET6;
495 sin6->sin6_port = 0;
496 sin6->sin6_addr = ipv6_hdr(skb)->saddr;
497 sin6->sin6_flowinfo = 0;
498 sin6->sin6_scope_id = ipv6_iface_scope_id(&sin6->sin6_addr,
499 IP6CB(skb)->iif);
500 *addr_len = sizeof(*sin6);
501 }
502
503 sock_recv_ts_and_drops(msg, sk, skb);
504
505 if (np->rxopt.all)
506 ip6_datagram_recv_ctl(sk, msg, skb);
507
508 err = copied;
509 if (flags & MSG_TRUNC)
510 err = skb->len;
511
512 out_free:
513 skb_free_datagram(sk, skb);
514 out:
515 return err;
516
517 csum_copy_err:
518 skb_kill_datagram(sk, skb, flags);
519
520 /* Error for blocking case is chosen to masquerade
521 as some normal condition.
522 */
523 err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
524 goto out;
525 }
526
rawv6_push_pending_frames(struct sock * sk,struct flowi6 * fl6,struct raw6_sock * rp)527 static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
528 struct raw6_sock *rp)
529 {
530 struct sk_buff *skb;
531 int err = 0;
532 int offset;
533 int len;
534 int total_len;
535 __wsum tmp_csum;
536 __sum16 csum;
537
538 if (!rp->checksum)
539 goto send;
540
541 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
542 goto out;
543
544 offset = rp->offset;
545 total_len = inet_sk(sk)->cork.base.length;
546 if (offset >= total_len - 1) {
547 err = -EINVAL;
548 ip6_flush_pending_frames(sk);
549 goto out;
550 }
551
552 /* should be check HW csum miyazawa */
553 if (skb_queue_len(&sk->sk_write_queue) == 1) {
554 /*
555 * Only one fragment on the socket.
556 */
557 tmp_csum = skb->csum;
558 } else {
559 struct sk_buff *csum_skb = NULL;
560 tmp_csum = 0;
561
562 skb_queue_walk(&sk->sk_write_queue, skb) {
563 tmp_csum = csum_add(tmp_csum, skb->csum);
564
565 if (csum_skb)
566 continue;
567
568 len = skb->len - skb_transport_offset(skb);
569 if (offset >= len) {
570 offset -= len;
571 continue;
572 }
573
574 csum_skb = skb;
575 }
576
577 skb = csum_skb;
578 }
579
580 offset += skb_transport_offset(skb);
581 if (skb_copy_bits(skb, offset, &csum, 2))
582 BUG();
583
584 /* in case cksum was not initialized */
585 if (unlikely(csum))
586 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
587
588 csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr,
589 total_len, fl6->flowi6_proto, tmp_csum);
590
591 if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP)
592 csum = CSUM_MANGLED_0;
593
594 if (skb_store_bits(skb, offset, &csum, 2))
595 BUG();
596
597 send:
598 err = ip6_push_pending_frames(sk);
599 out:
600 return err;
601 }
602
rawv6_send_hdrinc(struct sock * sk,void * from,int length,struct flowi6 * fl6,struct dst_entry ** dstp,unsigned int flags)603 static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
604 struct flowi6 *fl6, struct dst_entry **dstp,
605 unsigned int flags)
606 {
607 struct ipv6_pinfo *np = inet6_sk(sk);
608 struct ipv6hdr *iph;
609 struct sk_buff *skb;
610 int err;
611 struct rt6_info *rt = (struct rt6_info *)*dstp;
612 int hlen = LL_RESERVED_SPACE(rt->dst.dev);
613 int tlen = rt->dst.dev->needed_tailroom;
614
615 if (length > rt->dst.dev->mtu) {
616 ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu);
617 return -EMSGSIZE;
618 }
619 if (flags&MSG_PROBE)
620 goto out;
621
622 skb = sock_alloc_send_skb(sk,
623 length + hlen + tlen + 15,
624 flags & MSG_DONTWAIT, &err);
625 if (skb == NULL)
626 goto error;
627 skb_reserve(skb, hlen);
628
629 skb->priority = sk->sk_priority;
630 skb->mark = sk->sk_mark;
631 skb_dst_set(skb, &rt->dst);
632 *dstp = NULL;
633
634 skb_put(skb, length);
635 skb_reset_network_header(skb);
636 iph = ipv6_hdr(skb);
637
638 skb->ip_summed = CHECKSUM_NONE;
639
640 skb->transport_header = skb->network_header;
641 err = memcpy_fromiovecend((void *)iph, from, 0, length);
642 if (err)
643 goto error_fault;
644
645 IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
646 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL,
647 rt->dst.dev, dst_output);
648 if (err > 0)
649 err = net_xmit_errno(err);
650 if (err)
651 goto error;
652 out:
653 return 0;
654
655 error_fault:
656 err = -EFAULT;
657 kfree_skb(skb);
658 error:
659 IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
660 if (err == -ENOBUFS && !np->recverr)
661 err = 0;
662 return err;
663 }
664
rawv6_probe_proto_opt(struct flowi6 * fl6,struct msghdr * msg)665 static int rawv6_probe_proto_opt(struct flowi6 *fl6, struct msghdr *msg)
666 {
667 struct iovec *iov;
668 u8 __user *type = NULL;
669 u8 __user *code = NULL;
670 u8 len = 0;
671 int probed = 0;
672 int i;
673
674 if (!msg->msg_iov)
675 return 0;
676
677 for (i = 0; i < msg->msg_iovlen; i++) {
678 iov = &msg->msg_iov[i];
679 if (!iov)
680 continue;
681
682 switch (fl6->flowi6_proto) {
683 case IPPROTO_ICMPV6:
684 /* check if one-byte field is readable or not. */
685 if (iov->iov_base && iov->iov_len < 1)
686 break;
687
688 if (!type) {
689 type = iov->iov_base;
690 /* check if code field is readable or not. */
691 if (iov->iov_len > 1)
692 code = type + 1;
693 } else if (!code)
694 code = iov->iov_base;
695
696 if (type && code) {
697 if (get_user(fl6->fl6_icmp_type, type) ||
698 get_user(fl6->fl6_icmp_code, code))
699 return -EFAULT;
700 probed = 1;
701 }
702 break;
703 case IPPROTO_MH:
704 if (iov->iov_base && iov->iov_len < 1)
705 break;
706 /* check if type field is readable or not. */
707 if (iov->iov_len > 2 - len) {
708 u8 __user *p = iov->iov_base;
709 if (get_user(fl6->fl6_mh_type, &p[2 - len]))
710 return -EFAULT;
711 probed = 1;
712 } else
713 len += iov->iov_len;
714
715 break;
716 default:
717 probed = 1;
718 break;
719 }
720 if (probed)
721 break;
722 }
723 return 0;
724 }
725
rawv6_sendmsg(struct kiocb * iocb,struct sock * sk,struct msghdr * msg,size_t len)726 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
727 struct msghdr *msg, size_t len)
728 {
729 struct ipv6_txoptions *opt_to_free = NULL;
730 struct ipv6_txoptions opt_space;
731 struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
732 struct in6_addr *daddr, *final_p, final;
733 struct inet_sock *inet = inet_sk(sk);
734 struct ipv6_pinfo *np = inet6_sk(sk);
735 struct raw6_sock *rp = raw6_sk(sk);
736 struct ipv6_txoptions *opt = NULL;
737 struct ip6_flowlabel *flowlabel = NULL;
738 struct dst_entry *dst = NULL;
739 struct flowi6 fl6;
740 int addr_len = msg->msg_namelen;
741 int hlimit = -1;
742 int tclass = -1;
743 int dontfrag = -1;
744 u16 proto;
745 int err;
746
747 /* Rough check on arithmetic overflow,
748 better check is made in ip6_append_data().
749 */
750 if (len > INT_MAX)
751 return -EMSGSIZE;
752
753 /* Mirror BSD error message compatibility */
754 if (msg->msg_flags & MSG_OOB)
755 return -EOPNOTSUPP;
756
757 /*
758 * Get and verify the address.
759 */
760 memset(&fl6, 0, sizeof(fl6));
761
762 fl6.flowi6_mark = sk->sk_mark;
763 fl6.flowi6_uid = sk->sk_uid;
764
765 if (sin6) {
766 if (addr_len < SIN6_LEN_RFC2133)
767 return -EINVAL;
768
769 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
770 return -EAFNOSUPPORT;
771
772 /* port is the proto value [0..255] carried in nexthdr */
773 proto = ntohs(sin6->sin6_port);
774
775 if (!proto)
776 proto = inet->inet_num;
777 else if (proto != inet->inet_num)
778 return -EINVAL;
779
780 if (proto > 255)
781 return -EINVAL;
782
783 daddr = &sin6->sin6_addr;
784 if (np->sndflow) {
785 fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
786 if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
787 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
788 if (flowlabel == NULL)
789 return -EINVAL;
790 daddr = &flowlabel->dst;
791 }
792 }
793
794 /*
795 * Otherwise it will be difficult to maintain
796 * sk->sk_dst_cache.
797 */
798 if (sk->sk_state == TCP_ESTABLISHED &&
799 ipv6_addr_equal(daddr, &np->daddr))
800 daddr = &np->daddr;
801
802 if (addr_len >= sizeof(struct sockaddr_in6) &&
803 sin6->sin6_scope_id &&
804 __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr)))
805 fl6.flowi6_oif = sin6->sin6_scope_id;
806 } else {
807 if (sk->sk_state != TCP_ESTABLISHED)
808 return -EDESTADDRREQ;
809
810 proto = inet->inet_num;
811 daddr = &np->daddr;
812 fl6.flowlabel = np->flow_label;
813 }
814
815 if (fl6.flowi6_oif == 0)
816 fl6.flowi6_oif = sk->sk_bound_dev_if;
817
818 if (msg->msg_controllen) {
819 opt = &opt_space;
820 memset(opt, 0, sizeof(struct ipv6_txoptions));
821 opt->tot_len = sizeof(struct ipv6_txoptions);
822
823 err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt,
824 &hlimit, &tclass, &dontfrag);
825 if (err < 0) {
826 fl6_sock_release(flowlabel);
827 return err;
828 }
829 if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
830 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
831 if (flowlabel == NULL)
832 return -EINVAL;
833 }
834 if (!(opt->opt_nflen|opt->opt_flen))
835 opt = NULL;
836 }
837 if (!opt) {
838 opt = txopt_get(np);
839 opt_to_free = opt;
840 }
841 if (flowlabel)
842 opt = fl6_merge_options(&opt_space, flowlabel, opt);
843 opt = ipv6_fixup_options(&opt_space, opt);
844
845 fl6.flowi6_proto = proto;
846 err = rawv6_probe_proto_opt(&fl6, msg);
847 if (err)
848 goto out;
849
850 if (!ipv6_addr_any(daddr))
851 fl6.daddr = *daddr;
852 else
853 fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
854 if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
855 fl6.saddr = np->saddr;
856
857 final_p = fl6_update_dst(&fl6, opt, &final);
858
859 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
860 fl6.flowi6_oif = np->mcast_oif;
861 else if (!fl6.flowi6_oif)
862 fl6.flowi6_oif = np->ucast_oif;
863 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
864
865 dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true);
866 if (IS_ERR(dst)) {
867 err = PTR_ERR(dst);
868 goto out;
869 }
870 if (hlimit < 0) {
871 if (ipv6_addr_is_multicast(&fl6.daddr))
872 hlimit = np->mcast_hops;
873 else
874 hlimit = np->hop_limit;
875 if (hlimit < 0)
876 hlimit = ip6_dst_hoplimit(dst);
877 }
878
879 if (tclass < 0)
880 tclass = np->tclass;
881
882 if (dontfrag < 0)
883 dontfrag = np->dontfrag;
884
885 if (msg->msg_flags&MSG_CONFIRM)
886 goto do_confirm;
887
888 back_from_confirm:
889 if (inet->hdrincl)
890 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl6, &dst, msg->msg_flags);
891 else {
892 lock_sock(sk);
893 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
894 len, 0, hlimit, tclass, opt, &fl6, (struct rt6_info*)dst,
895 msg->msg_flags, dontfrag);
896
897 if (err)
898 ip6_flush_pending_frames(sk);
899 else if (!(msg->msg_flags & MSG_MORE))
900 err = rawv6_push_pending_frames(sk, &fl6, rp);
901 release_sock(sk);
902 }
903 done:
904 dst_release(dst);
905 out:
906 fl6_sock_release(flowlabel);
907 txopt_put(opt_to_free);
908 return err<0?err:len;
909 do_confirm:
910 dst_confirm(dst);
911 if (!(msg->msg_flags & MSG_PROBE) || len)
912 goto back_from_confirm;
913 err = 0;
914 goto done;
915 }
916
rawv6_seticmpfilter(struct sock * sk,int level,int optname,char __user * optval,int optlen)917 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
918 char __user *optval, int optlen)
919 {
920 switch (optname) {
921 case ICMPV6_FILTER:
922 if (optlen > sizeof(struct icmp6_filter))
923 optlen = sizeof(struct icmp6_filter);
924 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
925 return -EFAULT;
926 return 0;
927 default:
928 return -ENOPROTOOPT;
929 }
930
931 return 0;
932 }
933
rawv6_geticmpfilter(struct sock * sk,int level,int optname,char __user * optval,int __user * optlen)934 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
935 char __user *optval, int __user *optlen)
936 {
937 int len;
938
939 switch (optname) {
940 case ICMPV6_FILTER:
941 if (get_user(len, optlen))
942 return -EFAULT;
943 if (len < 0)
944 return -EINVAL;
945 if (len > sizeof(struct icmp6_filter))
946 len = sizeof(struct icmp6_filter);
947 if (put_user(len, optlen))
948 return -EFAULT;
949 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
950 return -EFAULT;
951 return 0;
952 default:
953 return -ENOPROTOOPT;
954 }
955
956 return 0;
957 }
958
959
do_rawv6_setsockopt(struct sock * sk,int level,int optname,char __user * optval,unsigned int optlen)960 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
961 char __user *optval, unsigned int optlen)
962 {
963 struct raw6_sock *rp = raw6_sk(sk);
964 int val;
965
966 if (get_user(val, (int __user *)optval))
967 return -EFAULT;
968
969 switch (optname) {
970 case IPV6_CHECKSUM:
971 if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
972 level == IPPROTO_IPV6) {
973 /*
974 * RFC3542 tells that IPV6_CHECKSUM socket
975 * option in the IPPROTO_IPV6 level is not
976 * allowed on ICMPv6 sockets.
977 * If you want to set it, use IPPROTO_RAW
978 * level IPV6_CHECKSUM socket option
979 * (Linux extension).
980 */
981 return -EINVAL;
982 }
983
984 /* You may get strange result with a positive odd offset;
985 RFC2292bis agrees with me. */
986 if (val > 0 && (val&1))
987 return -EINVAL;
988 if (val < 0) {
989 rp->checksum = 0;
990 } else {
991 rp->checksum = 1;
992 rp->offset = val;
993 }
994
995 return 0;
996
997 default:
998 return -ENOPROTOOPT;
999 }
1000 }
1001
rawv6_setsockopt(struct sock * sk,int level,int optname,char __user * optval,unsigned int optlen)1002 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1003 char __user *optval, unsigned int optlen)
1004 {
1005 switch (level) {
1006 case SOL_RAW:
1007 break;
1008
1009 case SOL_ICMPV6:
1010 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1011 return -EOPNOTSUPP;
1012 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1013 case SOL_IPV6:
1014 if (optname == IPV6_CHECKSUM)
1015 break;
1016 default:
1017 return ipv6_setsockopt(sk, level, optname, optval, optlen);
1018 }
1019
1020 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1021 }
1022
1023 #ifdef CONFIG_COMPAT
compat_rawv6_setsockopt(struct sock * sk,int level,int optname,char __user * optval,unsigned int optlen)1024 static int compat_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 case SOL_ICMPV6:
1031 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1032 return -EOPNOTSUPP;
1033 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1034 case SOL_IPV6:
1035 if (optname == IPV6_CHECKSUM)
1036 break;
1037 default:
1038 return compat_ipv6_setsockopt(sk, level, optname,
1039 optval, optlen);
1040 }
1041 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1042 }
1043 #endif
1044
do_rawv6_getsockopt(struct sock * sk,int level,int optname,char __user * optval,int __user * optlen)1045 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1046 char __user *optval, int __user *optlen)
1047 {
1048 struct raw6_sock *rp = raw6_sk(sk);
1049 int val, len;
1050
1051 if (get_user(len,optlen))
1052 return -EFAULT;
1053
1054 switch (optname) {
1055 case IPV6_CHECKSUM:
1056 /*
1057 * We allow getsockopt() for IPPROTO_IPV6-level
1058 * IPV6_CHECKSUM socket option on ICMPv6 sockets
1059 * since RFC3542 is silent about it.
1060 */
1061 if (rp->checksum == 0)
1062 val = -1;
1063 else
1064 val = rp->offset;
1065 break;
1066
1067 default:
1068 return -ENOPROTOOPT;
1069 }
1070
1071 len = min_t(unsigned int, sizeof(int), len);
1072
1073 if (put_user(len, optlen))
1074 return -EFAULT;
1075 if (copy_to_user(optval,&val,len))
1076 return -EFAULT;
1077 return 0;
1078 }
1079
rawv6_getsockopt(struct sock * sk,int level,int optname,char __user * optval,int __user * optlen)1080 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1081 char __user *optval, int __user *optlen)
1082 {
1083 switch (level) {
1084 case SOL_RAW:
1085 break;
1086
1087 case SOL_ICMPV6:
1088 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1089 return -EOPNOTSUPP;
1090 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1091 case SOL_IPV6:
1092 if (optname == IPV6_CHECKSUM)
1093 break;
1094 default:
1095 return ipv6_getsockopt(sk, level, optname, optval, optlen);
1096 }
1097
1098 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1099 }
1100
1101 #ifdef CONFIG_COMPAT
compat_rawv6_getsockopt(struct sock * sk,int level,int optname,char __user * optval,int __user * optlen)1102 static int compat_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 case SOL_ICMPV6:
1109 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1110 return -EOPNOTSUPP;
1111 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1112 case SOL_IPV6:
1113 if (optname == IPV6_CHECKSUM)
1114 break;
1115 default:
1116 return compat_ipv6_getsockopt(sk, level, optname,
1117 optval, optlen);
1118 }
1119 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1120 }
1121 #endif
1122
rawv6_ioctl(struct sock * sk,int cmd,unsigned long arg)1123 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1124 {
1125 switch (cmd) {
1126 case SIOCOUTQ: {
1127 int amount = sk_wmem_alloc_get(sk);
1128
1129 return put_user(amount, (int __user *)arg);
1130 }
1131 case SIOCINQ: {
1132 struct sk_buff *skb;
1133 int amount = 0;
1134
1135 spin_lock_bh(&sk->sk_receive_queue.lock);
1136 skb = skb_peek(&sk->sk_receive_queue);
1137 if (skb != NULL)
1138 amount = skb->tail - skb->transport_header;
1139 spin_unlock_bh(&sk->sk_receive_queue.lock);
1140 return put_user(amount, (int __user *)arg);
1141 }
1142
1143 default:
1144 #ifdef CONFIG_IPV6_MROUTE
1145 return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1146 #else
1147 return -ENOIOCTLCMD;
1148 #endif
1149 }
1150 }
1151
1152 #ifdef CONFIG_COMPAT
compat_rawv6_ioctl(struct sock * sk,unsigned int cmd,unsigned long arg)1153 static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
1154 {
1155 switch (cmd) {
1156 case SIOCOUTQ:
1157 case SIOCINQ:
1158 return -ENOIOCTLCMD;
1159 default:
1160 #ifdef CONFIG_IPV6_MROUTE
1161 return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
1162 #else
1163 return -ENOIOCTLCMD;
1164 #endif
1165 }
1166 }
1167 #endif
1168
rawv6_close(struct sock * sk,long timeout)1169 static void rawv6_close(struct sock *sk, long timeout)
1170 {
1171 if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1172 ip6_ra_control(sk, -1);
1173 ip6mr_sk_done(sk);
1174 sk_common_release(sk);
1175 }
1176
raw6_destroy(struct sock * sk)1177 static void raw6_destroy(struct sock *sk)
1178 {
1179 lock_sock(sk);
1180 ip6_flush_pending_frames(sk);
1181 release_sock(sk);
1182
1183 inet6_destroy_sock(sk);
1184 }
1185
rawv6_init_sk(struct sock * sk)1186 static int rawv6_init_sk(struct sock *sk)
1187 {
1188 struct raw6_sock *rp = raw6_sk(sk);
1189
1190 switch (inet_sk(sk)->inet_num) {
1191 case IPPROTO_ICMPV6:
1192 rp->checksum = 1;
1193 rp->offset = 2;
1194 break;
1195 case IPPROTO_MH:
1196 rp->checksum = 1;
1197 rp->offset = 4;
1198 break;
1199 default:
1200 break;
1201 }
1202 return 0;
1203 }
1204
1205 struct proto rawv6_prot = {
1206 .name = "RAWv6",
1207 .owner = THIS_MODULE,
1208 .close = rawv6_close,
1209 .destroy = raw6_destroy,
1210 .connect = ip6_datagram_connect,
1211 .disconnect = udp_disconnect,
1212 .ioctl = rawv6_ioctl,
1213 .init = rawv6_init_sk,
1214 .setsockopt = rawv6_setsockopt,
1215 .getsockopt = rawv6_getsockopt,
1216 .sendmsg = rawv6_sendmsg,
1217 .recvmsg = rawv6_recvmsg,
1218 .bind = rawv6_bind,
1219 .backlog_rcv = rawv6_rcv_skb,
1220 .hash = raw_hash_sk,
1221 .unhash = raw_unhash_sk,
1222 .obj_size = sizeof(struct raw6_sock),
1223 .h.raw_hash = &raw_v6_hashinfo,
1224 #ifdef CONFIG_COMPAT
1225 .compat_setsockopt = compat_rawv6_setsockopt,
1226 .compat_getsockopt = compat_rawv6_getsockopt,
1227 .compat_ioctl = compat_rawv6_ioctl,
1228 #endif
1229 };
1230
1231 #ifdef CONFIG_PROC_FS
raw6_sock_seq_show(struct seq_file * seq,struct sock * sp,int i)1232 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1233 {
1234 struct ipv6_pinfo *np = inet6_sk(sp);
1235 const struct in6_addr *dest, *src;
1236 __u16 destp, srcp;
1237
1238 dest = &np->daddr;
1239 src = &np->rcv_saddr;
1240 destp = 0;
1241 srcp = inet_sk(sp)->inet_num;
1242 seq_printf(seq,
1243 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1244 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d\n",
1245 i,
1246 src->s6_addr32[0], src->s6_addr32[1],
1247 src->s6_addr32[2], src->s6_addr32[3], srcp,
1248 dest->s6_addr32[0], dest->s6_addr32[1],
1249 dest->s6_addr32[2], dest->s6_addr32[3], destp,
1250 sp->sk_state,
1251 sk_wmem_alloc_get(sp),
1252 sk_rmem_alloc_get(sp),
1253 0, 0L, 0,
1254 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)),
1255 0,
1256 sock_i_ino(sp),
1257 atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1258 }
1259
raw6_seq_show(struct seq_file * seq,void * v)1260 static int raw6_seq_show(struct seq_file *seq, void *v)
1261 {
1262 if (v == SEQ_START_TOKEN)
1263 seq_printf(seq,
1264 " sl "
1265 "local_address "
1266 "remote_address "
1267 "st tx_queue rx_queue tr tm->when retrnsmt"
1268 " uid timeout inode ref pointer drops\n");
1269 else
1270 raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1271 return 0;
1272 }
1273
1274 static const struct seq_operations raw6_seq_ops = {
1275 .start = raw_seq_start,
1276 .next = raw_seq_next,
1277 .stop = raw_seq_stop,
1278 .show = raw6_seq_show,
1279 };
1280
raw6_seq_open(struct inode * inode,struct file * file)1281 static int raw6_seq_open(struct inode *inode, struct file *file)
1282 {
1283 return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1284 }
1285
1286 static const struct file_operations raw6_seq_fops = {
1287 .owner = THIS_MODULE,
1288 .open = raw6_seq_open,
1289 .read = seq_read,
1290 .llseek = seq_lseek,
1291 .release = seq_release_net,
1292 };
1293
raw6_init_net(struct net * net)1294 static int __net_init raw6_init_net(struct net *net)
1295 {
1296 if (!proc_create("raw6", S_IRUGO, net->proc_net, &raw6_seq_fops))
1297 return -ENOMEM;
1298
1299 return 0;
1300 }
1301
raw6_exit_net(struct net * net)1302 static void __net_exit raw6_exit_net(struct net *net)
1303 {
1304 remove_proc_entry("raw6", net->proc_net);
1305 }
1306
1307 static struct pernet_operations raw6_net_ops = {
1308 .init = raw6_init_net,
1309 .exit = raw6_exit_net,
1310 };
1311
raw6_proc_init(void)1312 int __init raw6_proc_init(void)
1313 {
1314 return register_pernet_subsys(&raw6_net_ops);
1315 }
1316
raw6_proc_exit(void)1317 void raw6_proc_exit(void)
1318 {
1319 unregister_pernet_subsys(&raw6_net_ops);
1320 }
1321 #endif /* CONFIG_PROC_FS */
1322
1323 /* Same as inet6_dgram_ops, sans udp_poll. */
1324 static const struct proto_ops inet6_sockraw_ops = {
1325 .family = PF_INET6,
1326 .owner = THIS_MODULE,
1327 .release = inet6_release,
1328 .bind = inet6_bind,
1329 .connect = inet_dgram_connect, /* ok */
1330 .socketpair = sock_no_socketpair, /* a do nothing */
1331 .accept = sock_no_accept, /* a do nothing */
1332 .getname = inet6_getname,
1333 .poll = datagram_poll, /* ok */
1334 .ioctl = inet6_ioctl, /* must change */
1335 .listen = sock_no_listen, /* ok */
1336 .shutdown = inet_shutdown, /* ok */
1337 .setsockopt = sock_common_setsockopt, /* ok */
1338 .getsockopt = sock_common_getsockopt, /* ok */
1339 .sendmsg = inet_sendmsg, /* ok */
1340 .recvmsg = sock_common_recvmsg, /* ok */
1341 .mmap = sock_no_mmap,
1342 .sendpage = sock_no_sendpage,
1343 #ifdef CONFIG_COMPAT
1344 .compat_setsockopt = compat_sock_common_setsockopt,
1345 .compat_getsockopt = compat_sock_common_getsockopt,
1346 #endif
1347 };
1348
1349 static struct inet_protosw rawv6_protosw = {
1350 .type = SOCK_RAW,
1351 .protocol = IPPROTO_IP, /* wild card */
1352 .prot = &rawv6_prot,
1353 .ops = &inet6_sockraw_ops,
1354 .no_check = UDP_CSUM_DEFAULT,
1355 .flags = INET_PROTOSW_REUSE,
1356 };
1357
rawv6_init(void)1358 int __init rawv6_init(void)
1359 {
1360 int ret;
1361
1362 ret = inet6_register_protosw(&rawv6_protosw);
1363 if (ret)
1364 goto out;
1365 out:
1366 return ret;
1367 }
1368
rawv6_exit(void)1369 void rawv6_exit(void)
1370 {
1371 inet6_unregister_protosw(&rawv6_protosw);
1372 }
1373