Root/
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 <asm/uaccess.h> |
35 | #include <asm/ioctls.h> |
36 | |
37 | #include <net/net_namespace.h> |
38 | #include <net/ip.h> |
39 | #include <net/sock.h> |
40 | #include <net/snmp.h> |
41 | |
42 | #include <net/ipv6.h> |
43 | #include <net/ndisc.h> |
44 | #include <net/protocol.h> |
45 | #include <net/ip6_route.h> |
46 | #include <net/ip6_checksum.h> |
47 | #include <net/addrconf.h> |
48 | #include <net/transp_v6.h> |
49 | #include <net/udp.h> |
50 | #include <net/inet_common.h> |
51 | #include <net/tcp_states.h> |
52 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
53 | #include <net/mip6.h> |
54 | #endif |
55 | #include <linux/mroute6.h> |
56 | |
57 | #include <net/raw.h> |
58 | #include <net/rawv6.h> |
59 | #include <net/xfrm.h> |
60 | |
61 | #include <linux/proc_fs.h> |
62 | #include <linux/seq_file.h> |
63 | |
64 | static struct raw_hashinfo raw_v6_hashinfo = { |
65 | .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock), |
66 | }; |
67 | |
68 | static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk, |
69 | unsigned short num, struct in6_addr *loc_addr, |
70 | struct in6_addr *rmt_addr, int dif) |
71 | { |
72 | struct hlist_node *node; |
73 | int is_multicast = ipv6_addr_is_multicast(loc_addr); |
74 | |
75 | sk_for_each_from(sk, node) |
76 | if (inet_sk(sk)->inet_num == num) { |
77 | struct ipv6_pinfo *np = inet6_sk(sk); |
78 | |
79 | if (!net_eq(sock_net(sk), net)) |
80 | continue; |
81 | |
82 | if (!ipv6_addr_any(&np->daddr) && |
83 | !ipv6_addr_equal(&np->daddr, rmt_addr)) |
84 | continue; |
85 | |
86 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) |
87 | continue; |
88 | |
89 | if (!ipv6_addr_any(&np->rcv_saddr)) { |
90 | if (ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
91 | goto found; |
92 | if (is_multicast && |
93 | inet6_mc_check(sk, loc_addr, rmt_addr)) |
94 | goto found; |
95 | continue; |
96 | } |
97 | goto found; |
98 | } |
99 | sk = NULL; |
100 | found: |
101 | return sk; |
102 | } |
103 | |
104 | /* |
105 | * 0 - deliver |
106 | * 1 - block |
107 | */ |
108 | static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb) |
109 | { |
110 | struct icmp6hdr *icmph; |
111 | struct raw6_sock *rp = raw6_sk(sk); |
112 | |
113 | if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) { |
114 | __u32 *data = &rp->filter.data[0]; |
115 | int bit_nr; |
116 | |
117 | icmph = (struct icmp6hdr *) skb->data; |
118 | bit_nr = icmph->icmp6_type; |
119 | |
120 | return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0; |
121 | } |
122 | return 0; |
123 | } |
124 | |
125 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
126 | static int (*mh_filter)(struct sock *sock, struct sk_buff *skb); |
127 | |
128 | int rawv6_mh_filter_register(int (*filter)(struct sock *sock, |
129 | struct sk_buff *skb)) |
130 | { |
131 | rcu_assign_pointer(mh_filter, filter); |
132 | return 0; |
133 | } |
134 | EXPORT_SYMBOL(rawv6_mh_filter_register); |
135 | |
136 | int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock, |
137 | struct sk_buff *skb)) |
138 | { |
139 | rcu_assign_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 | */ |
154 | static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) |
155 | { |
156 | struct in6_addr *saddr; |
157 | struct in6_addr *daddr; |
158 | struct sock *sk; |
159 | int delivered = 0; |
160 | __u8 hash; |
161 | struct net *net; |
162 | |
163 | saddr = &ipv6_hdr(skb)->saddr; |
164 | daddr = saddr + 1; |
165 | |
166 | hash = nexthdr & (MAX_INET_PROTOS - 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 = 1; |
181 | switch (nexthdr) { |
182 | case IPPROTO_ICMPV6: |
183 | filtered = icmpv6_filter(sk, skb); |
184 | break; |
185 | |
186 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
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 | int (*filter)(struct sock *sock, struct sk_buff *skb); |
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 | |
226 | int 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 & (MAX_INET_PROTOS - 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 */ |
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 (addr_type & IPV6_ADDR_LINKLOCAL) { |
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 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); |
301 | if (!(addr_type & IPV6_ADDR_MULTICAST)) |
302 | ipv6_addr_copy(&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 | |
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 | harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); |
331 | |
332 | if (np->recverr) { |
333 | u8 *payload = skb->data; |
334 | if (!inet->hdrincl) |
335 | payload += offset; |
336 | ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); |
337 | } |
338 | |
339 | if (np->recverr || harderr) { |
340 | sk->sk_err = err; |
341 | sk->sk_error_report(sk); |
342 | } |
343 | } |
344 | |
345 | void raw6_icmp_error(struct sk_buff *skb, int nexthdr, |
346 | u8 type, u8 code, int inner_offset, __be32 info) |
347 | { |
348 | struct sock *sk; |
349 | int hash; |
350 | struct in6_addr *saddr, *daddr; |
351 | struct net *net; |
352 | |
353 | hash = nexthdr & (RAW_HTABLE_SIZE - 1); |
354 | |
355 | read_lock(&raw_v6_hashinfo.lock); |
356 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); |
357 | if (sk != NULL) { |
358 | /* Note: ipv6_hdr(skb) != skb->data */ |
359 | struct ipv6hdr *ip6h = (struct ipv6hdr *)skb->data; |
360 | saddr = &ip6h->saddr; |
361 | daddr = &ip6h->daddr; |
362 | net = dev_net(skb->dev); |
363 | |
364 | while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr, |
365 | IP6CB(skb)->iif))) { |
366 | rawv6_err(sk, skb, NULL, type, code, |
367 | inner_offset, info); |
368 | sk = sk_next(sk); |
369 | } |
370 | } |
371 | read_unlock(&raw_v6_hashinfo.lock); |
372 | } |
373 | |
374 | static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb) |
375 | { |
376 | if ((raw6_sk(sk)->checksum || sk->sk_filter) && |
377 | skb_checksum_complete(skb)) { |
378 | atomic_inc(&sk->sk_drops); |
379 | kfree_skb(skb); |
380 | return NET_RX_DROP; |
381 | } |
382 | |
383 | /* Charge it to the socket. */ |
384 | if (sock_queue_rcv_skb(sk, skb) < 0) { |
385 | kfree_skb(skb); |
386 | return NET_RX_DROP; |
387 | } |
388 | |
389 | return 0; |
390 | } |
391 | |
392 | /* |
393 | * This is next to useless... |
394 | * if we demultiplex in network layer we don't need the extra call |
395 | * just to queue the skb... |
396 | * maybe we could have the network decide upon a hint if it |
397 | * should call raw_rcv for demultiplexing |
398 | */ |
399 | int rawv6_rcv(struct sock *sk, struct sk_buff *skb) |
400 | { |
401 | struct inet_sock *inet = inet_sk(sk); |
402 | struct raw6_sock *rp = raw6_sk(sk); |
403 | |
404 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { |
405 | atomic_inc(&sk->sk_drops); |
406 | kfree_skb(skb); |
407 | return NET_RX_DROP; |
408 | } |
409 | |
410 | if (!rp->checksum) |
411 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
412 | |
413 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
414 | skb_postpull_rcsum(skb, skb_network_header(skb), |
415 | skb_network_header_len(skb)); |
416 | if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
417 | &ipv6_hdr(skb)->daddr, |
418 | skb->len, inet->inet_num, skb->csum)) |
419 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
420 | } |
421 | if (!skb_csum_unnecessary(skb)) |
422 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
423 | &ipv6_hdr(skb)->daddr, |
424 | skb->len, |
425 | inet->inet_num, 0)); |
426 | |
427 | if (inet->hdrincl) { |
428 | if (skb_checksum_complete(skb)) { |
429 | atomic_inc(&sk->sk_drops); |
430 | kfree_skb(skb); |
431 | return NET_RX_DROP; |
432 | } |
433 | } |
434 | |
435 | rawv6_rcv_skb(sk, skb); |
436 | return 0; |
437 | } |
438 | |
439 | |
440 | /* |
441 | * This should be easy, if there is something there |
442 | * we return it, otherwise we block. |
443 | */ |
444 | |
445 | static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
446 | struct msghdr *msg, size_t len, |
447 | int noblock, int flags, int *addr_len) |
448 | { |
449 | struct ipv6_pinfo *np = inet6_sk(sk); |
450 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name; |
451 | struct sk_buff *skb; |
452 | size_t copied; |
453 | int err; |
454 | |
455 | if (flags & MSG_OOB) |
456 | return -EOPNOTSUPP; |
457 | |
458 | if (addr_len) |
459 | *addr_len=sizeof(*sin6); |
460 | |
461 | if (flags & MSG_ERRQUEUE) |
462 | return ipv6_recv_error(sk, msg, len); |
463 | |
464 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
465 | if (!skb) |
466 | goto out; |
467 | |
468 | copied = skb->len; |
469 | if (copied > len) { |
470 | copied = len; |
471 | msg->msg_flags |= MSG_TRUNC; |
472 | } |
473 | |
474 | if (skb_csum_unnecessary(skb)) { |
475 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
476 | } else if (msg->msg_flags&MSG_TRUNC) { |
477 | if (__skb_checksum_complete(skb)) |
478 | goto csum_copy_err; |
479 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
480 | } else { |
481 | err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov); |
482 | if (err == -EINVAL) |
483 | goto csum_copy_err; |
484 | } |
485 | if (err) |
486 | goto out_free; |
487 | |
488 | /* Copy the address. */ |
489 | if (sin6) { |
490 | sin6->sin6_family = AF_INET6; |
491 | sin6->sin6_port = 0; |
492 | ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr); |
493 | sin6->sin6_flowinfo = 0; |
494 | sin6->sin6_scope_id = 0; |
495 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
496 | sin6->sin6_scope_id = IP6CB(skb)->iif; |
497 | } |
498 | |
499 | sock_recv_ts_and_drops(msg, sk, skb); |
500 | |
501 | if (np->rxopt.all) |
502 | datagram_recv_ctl(sk, msg, skb); |
503 | |
504 | err = copied; |
505 | if (flags & MSG_TRUNC) |
506 | err = skb->len; |
507 | |
508 | out_free: |
509 | skb_free_datagram(sk, skb); |
510 | out: |
511 | return err; |
512 | |
513 | csum_copy_err: |
514 | skb_kill_datagram(sk, skb, flags); |
515 | |
516 | /* Error for blocking case is chosen to masquerade |
517 | as some normal condition. |
518 | */ |
519 | err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; |
520 | goto out; |
521 | } |
522 | |
523 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl, |
524 | struct raw6_sock *rp) |
525 | { |
526 | struct sk_buff *skb; |
527 | int err = 0; |
528 | int offset; |
529 | int len; |
530 | int total_len; |
531 | __wsum tmp_csum; |
532 | __sum16 csum; |
533 | |
534 | if (!rp->checksum) |
535 | goto send; |
536 | |
537 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) |
538 | goto out; |
539 | |
540 | offset = rp->offset; |
541 | total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) - |
542 | skb->data); |
543 | if (offset >= total_len - 1) { |
544 | err = -EINVAL; |
545 | ip6_flush_pending_frames(sk); |
546 | goto out; |
547 | } |
548 | |
549 | /* should be check HW csum miyazawa */ |
550 | if (skb_queue_len(&sk->sk_write_queue) == 1) { |
551 | /* |
552 | * Only one fragment on the socket. |
553 | */ |
554 | tmp_csum = skb->csum; |
555 | } else { |
556 | struct sk_buff *csum_skb = NULL; |
557 | tmp_csum = 0; |
558 | |
559 | skb_queue_walk(&sk->sk_write_queue, skb) { |
560 | tmp_csum = csum_add(tmp_csum, skb->csum); |
561 | |
562 | if (csum_skb) |
563 | continue; |
564 | |
565 | len = skb->len - skb_transport_offset(skb); |
566 | if (offset >= len) { |
567 | offset -= len; |
568 | continue; |
569 | } |
570 | |
571 | csum_skb = skb; |
572 | } |
573 | |
574 | skb = csum_skb; |
575 | } |
576 | |
577 | offset += skb_transport_offset(skb); |
578 | if (skb_copy_bits(skb, offset, &csum, 2)) |
579 | BUG(); |
580 | |
581 | /* in case cksum was not initialized */ |
582 | if (unlikely(csum)) |
583 | tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); |
584 | |
585 | csum = csum_ipv6_magic(&fl->fl6_src, |
586 | &fl->fl6_dst, |
587 | total_len, fl->proto, tmp_csum); |
588 | |
589 | if (csum == 0 && fl->proto == IPPROTO_UDP) |
590 | csum = CSUM_MANGLED_0; |
591 | |
592 | if (skb_store_bits(skb, offset, &csum, 2)) |
593 | BUG(); |
594 | |
595 | send: |
596 | err = ip6_push_pending_frames(sk); |
597 | out: |
598 | return err; |
599 | } |
600 | |
601 | static int rawv6_send_hdrinc(struct sock *sk, void *from, int length, |
602 | struct flowi *fl, struct rt6_info *rt, |
603 | unsigned int flags) |
604 | { |
605 | struct ipv6_pinfo *np = inet6_sk(sk); |
606 | struct ipv6hdr *iph; |
607 | struct sk_buff *skb; |
608 | int err; |
609 | |
610 | if (length > rt->u.dst.dev->mtu) { |
611 | ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu); |
612 | return -EMSGSIZE; |
613 | } |
614 | if (flags&MSG_PROBE) |
615 | goto out; |
616 | |
617 | skb = sock_alloc_send_skb(sk, |
618 | length + LL_ALLOCATED_SPACE(rt->u.dst.dev) + 15, |
619 | flags & MSG_DONTWAIT, &err); |
620 | if (skb == NULL) |
621 | goto error; |
622 | skb_reserve(skb, LL_RESERVED_SPACE(rt->u.dst.dev)); |
623 | |
624 | skb->priority = sk->sk_priority; |
625 | skb->mark = sk->sk_mark; |
626 | skb_dst_set(skb, dst_clone(&rt->u.dst)); |
627 | |
628 | skb_put(skb, length); |
629 | skb_reset_network_header(skb); |
630 | iph = ipv6_hdr(skb); |
631 | |
632 | skb->ip_summed = CHECKSUM_NONE; |
633 | |
634 | skb->transport_header = skb->network_header; |
635 | err = memcpy_fromiovecend((void *)iph, from, 0, length); |
636 | if (err) |
637 | goto error_fault; |
638 | |
639 | IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len); |
640 | err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev, |
641 | dst_output); |
642 | if (err > 0) |
643 | err = net_xmit_errno(err); |
644 | if (err) |
645 | goto error; |
646 | out: |
647 | return 0; |
648 | |
649 | error_fault: |
650 | err = -EFAULT; |
651 | kfree_skb(skb); |
652 | error: |
653 | IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); |
654 | if (err == -ENOBUFS && !np->recverr) |
655 | err = 0; |
656 | return err; |
657 | } |
658 | |
659 | static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) |
660 | { |
661 | struct iovec *iov; |
662 | u8 __user *type = NULL; |
663 | u8 __user *code = NULL; |
664 | u8 len = 0; |
665 | int probed = 0; |
666 | int i; |
667 | |
668 | if (!msg->msg_iov) |
669 | return 0; |
670 | |
671 | for (i = 0; i < msg->msg_iovlen; i++) { |
672 | iov = &msg->msg_iov[i]; |
673 | if (!iov) |
674 | continue; |
675 | |
676 | switch (fl->proto) { |
677 | case IPPROTO_ICMPV6: |
678 | /* check if one-byte field is readable or not. */ |
679 | if (iov->iov_base && iov->iov_len < 1) |
680 | break; |
681 | |
682 | if (!type) { |
683 | type = iov->iov_base; |
684 | /* check if code field is readable or not. */ |
685 | if (iov->iov_len > 1) |
686 | code = type + 1; |
687 | } else if (!code) |
688 | code = iov->iov_base; |
689 | |
690 | if (type && code) { |
691 | if (get_user(fl->fl_icmp_type, type) || |
692 | get_user(fl->fl_icmp_code, code)) |
693 | return -EFAULT; |
694 | probed = 1; |
695 | } |
696 | break; |
697 | case IPPROTO_MH: |
698 | if (iov->iov_base && iov->iov_len < 1) |
699 | break; |
700 | /* check if type field is readable or not. */ |
701 | if (iov->iov_len > 2 - len) { |
702 | u8 __user *p = iov->iov_base; |
703 | if (get_user(fl->fl_mh_type, &p[2 - len])) |
704 | return -EFAULT; |
705 | probed = 1; |
706 | } else |
707 | len += iov->iov_len; |
708 | |
709 | break; |
710 | default: |
711 | probed = 1; |
712 | break; |
713 | } |
714 | if (probed) |
715 | break; |
716 | } |
717 | return 0; |
718 | } |
719 | |
720 | static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
721 | struct msghdr *msg, size_t len) |
722 | { |
723 | struct ipv6_txoptions opt_space; |
724 | struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name; |
725 | struct in6_addr *daddr, *final_p = NULL, final; |
726 | struct inet_sock *inet = inet_sk(sk); |
727 | struct ipv6_pinfo *np = inet6_sk(sk); |
728 | struct raw6_sock *rp = raw6_sk(sk); |
729 | struct ipv6_txoptions *opt = NULL; |
730 | struct ip6_flowlabel *flowlabel = NULL; |
731 | struct dst_entry *dst = NULL; |
732 | struct flowi fl; |
733 | int addr_len = msg->msg_namelen; |
734 | int hlimit = -1; |
735 | int tclass = -1; |
736 | u16 proto; |
737 | int err; |
738 | |
739 | /* Rough check on arithmetic overflow, |
740 | better check is made in ip6_append_data(). |
741 | */ |
742 | if (len > INT_MAX) |
743 | return -EMSGSIZE; |
744 | |
745 | /* Mirror BSD error message compatibility */ |
746 | if (msg->msg_flags & MSG_OOB) |
747 | return -EOPNOTSUPP; |
748 | |
749 | /* |
750 | * Get and verify the address. |
751 | */ |
752 | memset(&fl, 0, sizeof(fl)); |
753 | |
754 | fl.mark = sk->sk_mark; |
755 | |
756 | if (sin6) { |
757 | if (addr_len < SIN6_LEN_RFC2133) |
758 | return -EINVAL; |
759 | |
760 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) |
761 | return(-EAFNOSUPPORT); |
762 | |
763 | /* port is the proto value [0..255] carried in nexthdr */ |
764 | proto = ntohs(sin6->sin6_port); |
765 | |
766 | if (!proto) |
767 | proto = inet->inet_num; |
768 | else if (proto != inet->inet_num) |
769 | return(-EINVAL); |
770 | |
771 | if (proto > 255) |
772 | return(-EINVAL); |
773 | |
774 | daddr = &sin6->sin6_addr; |
775 | if (np->sndflow) { |
776 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
777 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { |
778 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); |
779 | if (flowlabel == NULL) |
780 | return -EINVAL; |
781 | daddr = &flowlabel->dst; |
782 | } |
783 | } |
784 | |
785 | /* |
786 | * Otherwise it will be difficult to maintain |
787 | * sk->sk_dst_cache. |
788 | */ |
789 | if (sk->sk_state == TCP_ESTABLISHED && |
790 | ipv6_addr_equal(daddr, &np->daddr)) |
791 | daddr = &np->daddr; |
792 | |
793 | if (addr_len >= sizeof(struct sockaddr_in6) && |
794 | sin6->sin6_scope_id && |
795 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) |
796 | fl.oif = sin6->sin6_scope_id; |
797 | } else { |
798 | if (sk->sk_state != TCP_ESTABLISHED) |
799 | return -EDESTADDRREQ; |
800 | |
801 | proto = inet->inet_num; |
802 | daddr = &np->daddr; |
803 | fl.fl6_flowlabel = np->flow_label; |
804 | } |
805 | |
806 | if (fl.oif == 0) |
807 | fl.oif = sk->sk_bound_dev_if; |
808 | |
809 | if (msg->msg_controllen) { |
810 | opt = &opt_space; |
811 | memset(opt, 0, sizeof(struct ipv6_txoptions)); |
812 | opt->tot_len = sizeof(struct ipv6_txoptions); |
813 | |
814 | err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass); |
815 | if (err < 0) { |
816 | fl6_sock_release(flowlabel); |
817 | return err; |
818 | } |
819 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
820 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); |
821 | if (flowlabel == NULL) |
822 | return -EINVAL; |
823 | } |
824 | if (!(opt->opt_nflen|opt->opt_flen)) |
825 | opt = NULL; |
826 | } |
827 | if (opt == NULL) |
828 | opt = np->opt; |
829 | if (flowlabel) |
830 | opt = fl6_merge_options(&opt_space, flowlabel, opt); |
831 | opt = ipv6_fixup_options(&opt_space, opt); |
832 | |
833 | fl.proto = proto; |
834 | err = rawv6_probe_proto_opt(&fl, msg); |
835 | if (err) |
836 | goto out; |
837 | |
838 | if (!ipv6_addr_any(daddr)) |
839 | ipv6_addr_copy(&fl.fl6_dst, daddr); |
840 | else |
841 | fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ |
842 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |
843 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); |
844 | |
845 | /* merge ip6_build_xmit from ip6_output */ |
846 | if (opt && opt->srcrt) { |
847 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; |
848 | ipv6_addr_copy(&final, &fl.fl6_dst); |
849 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); |
850 | final_p = &final; |
851 | } |
852 | |
853 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) |
854 | fl.oif = np->mcast_oif; |
855 | security_sk_classify_flow(sk, &fl); |
856 | |
857 | err = ip6_dst_lookup(sk, &dst, &fl); |
858 | if (err) |
859 | goto out; |
860 | if (final_p) |
861 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
862 | |
863 | err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT); |
864 | if (err < 0) { |
865 | if (err == -EREMOTE) |
866 | err = ip6_dst_blackhole(sk, &dst, &fl); |
867 | if (err < 0) |
868 | goto out; |
869 | } |
870 | |
871 | if (hlimit < 0) { |
872 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) |
873 | hlimit = np->mcast_hops; |
874 | else |
875 | hlimit = np->hop_limit; |
876 | if (hlimit < 0) |
877 | hlimit = ip6_dst_hoplimit(dst); |
878 | } |
879 | |
880 | if (tclass < 0) |
881 | tclass = np->tclass; |
882 | |
883 | if (msg->msg_flags&MSG_CONFIRM) |
884 | goto do_confirm; |
885 | |
886 | back_from_confirm: |
887 | if (inet->hdrincl) { |
888 | err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags); |
889 | } else { |
890 | lock_sock(sk); |
891 | err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, |
892 | len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst, |
893 | msg->msg_flags); |
894 | |
895 | if (err) |
896 | ip6_flush_pending_frames(sk); |
897 | else if (!(msg->msg_flags & MSG_MORE)) |
898 | err = rawv6_push_pending_frames(sk, &fl, rp); |
899 | release_sock(sk); |
900 | } |
901 | done: |
902 | dst_release(dst); |
903 | out: |
904 | fl6_sock_release(flowlabel); |
905 | return err<0?err:len; |
906 | do_confirm: |
907 | dst_confirm(dst); |
908 | if (!(msg->msg_flags & MSG_PROBE) || len) |
909 | goto back_from_confirm; |
910 | err = 0; |
911 | goto done; |
912 | } |
913 | |
914 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, |
915 | char __user *optval, int optlen) |
916 | { |
917 | switch (optname) { |
918 | case ICMPV6_FILTER: |
919 | if (optlen > sizeof(struct icmp6_filter)) |
920 | optlen = sizeof(struct icmp6_filter); |
921 | if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) |
922 | return -EFAULT; |
923 | return 0; |
924 | default: |
925 | return -ENOPROTOOPT; |
926 | } |
927 | |
928 | return 0; |
929 | } |
930 | |
931 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, |
932 | char __user *optval, int __user *optlen) |
933 | { |
934 | int len; |
935 | |
936 | switch (optname) { |
937 | case ICMPV6_FILTER: |
938 | if (get_user(len, optlen)) |
939 | return -EFAULT; |
940 | if (len < 0) |
941 | return -EINVAL; |
942 | if (len > sizeof(struct icmp6_filter)) |
943 | len = sizeof(struct icmp6_filter); |
944 | if (put_user(len, optlen)) |
945 | return -EFAULT; |
946 | if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) |
947 | return -EFAULT; |
948 | return 0; |
949 | default: |
950 | return -ENOPROTOOPT; |
951 | } |
952 | |
953 | return 0; |
954 | } |
955 | |
956 | |
957 | static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, |
958 | char __user *optval, unsigned int optlen) |
959 | { |
960 | struct raw6_sock *rp = raw6_sk(sk); |
961 | int val; |
962 | |
963 | if (get_user(val, (int __user *)optval)) |
964 | return -EFAULT; |
965 | |
966 | switch (optname) { |
967 | case IPV6_CHECKSUM: |
968 | if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 && |
969 | level == IPPROTO_IPV6) { |
970 | /* |
971 | * RFC3542 tells that IPV6_CHECKSUM socket |
972 | * option in the IPPROTO_IPV6 level is not |
973 | * allowed on ICMPv6 sockets. |
974 | * If you want to set it, use IPPROTO_RAW |
975 | * level IPV6_CHECKSUM socket option |
976 | * (Linux extension). |
977 | */ |
978 | return -EINVAL; |
979 | } |
980 | |
981 | /* You may get strange result with a positive odd offset; |
982 | RFC2292bis agrees with me. */ |
983 | if (val > 0 && (val&1)) |
984 | return(-EINVAL); |
985 | if (val < 0) { |
986 | rp->checksum = 0; |
987 | } else { |
988 | rp->checksum = 1; |
989 | rp->offset = val; |
990 | } |
991 | |
992 | return 0; |
993 | break; |
994 | |
995 | default: |
996 | return(-ENOPROTOOPT); |
997 | } |
998 | } |
999 | |
1000 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, |
1001 | char __user *optval, unsigned int optlen) |
1002 | { |
1003 | switch(level) { |
1004 | case SOL_RAW: |
1005 | break; |
1006 | |
1007 | case SOL_ICMPV6: |
1008 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
1009 | return -EOPNOTSUPP; |
1010 | return rawv6_seticmpfilter(sk, level, optname, optval, |
1011 | optlen); |
1012 | case SOL_IPV6: |
1013 | if (optname == IPV6_CHECKSUM) |
1014 | break; |
1015 | default: |
1016 | return ipv6_setsockopt(sk, level, optname, optval, |
1017 | optlen); |
1018 | } |
1019 | |
1020 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1021 | } |
1022 | |
1023 | #ifdef CONFIG_COMPAT |
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 | |
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 | |
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, |
1091 | optlen); |
1092 | case SOL_IPV6: |
1093 | if (optname == IPV6_CHECKSUM) |
1094 | break; |
1095 | default: |
1096 | return ipv6_getsockopt(sk, level, optname, optval, |
1097 | optlen); |
1098 | } |
1099 | |
1100 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1101 | } |
1102 | |
1103 | #ifdef CONFIG_COMPAT |
1104 | static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname, |
1105 | char __user *optval, int __user *optlen) |
1106 | { |
1107 | switch (level) { |
1108 | case SOL_RAW: |
1109 | break; |
1110 | case SOL_ICMPV6: |
1111 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
1112 | return -EOPNOTSUPP; |
1113 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); |
1114 | case SOL_IPV6: |
1115 | if (optname == IPV6_CHECKSUM) |
1116 | break; |
1117 | default: |
1118 | return compat_ipv6_getsockopt(sk, level, optname, |
1119 | optval, optlen); |
1120 | } |
1121 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1122 | } |
1123 | #endif |
1124 | |
1125 | static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) |
1126 | { |
1127 | switch(cmd) { |
1128 | case SIOCOUTQ: |
1129 | { |
1130 | int amount = sk_wmem_alloc_get(sk); |
1131 | |
1132 | return put_user(amount, (int __user *)arg); |
1133 | } |
1134 | case SIOCINQ: |
1135 | { |
1136 | struct sk_buff *skb; |
1137 | int amount = 0; |
1138 | |
1139 | spin_lock_bh(&sk->sk_receive_queue.lock); |
1140 | skb = skb_peek(&sk->sk_receive_queue); |
1141 | if (skb != NULL) |
1142 | amount = skb->tail - skb->transport_header; |
1143 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
1144 | return put_user(amount, (int __user *)arg); |
1145 | } |
1146 | |
1147 | default: |
1148 | #ifdef CONFIG_IPV6_MROUTE |
1149 | return ip6mr_ioctl(sk, cmd, (void __user *)arg); |
1150 | #else |
1151 | return -ENOIOCTLCMD; |
1152 | #endif |
1153 | } |
1154 | } |
1155 | |
1156 | static void rawv6_close(struct sock *sk, long timeout) |
1157 | { |
1158 | if (inet_sk(sk)->inet_num == IPPROTO_RAW) |
1159 | ip6_ra_control(sk, -1); |
1160 | ip6mr_sk_done(sk); |
1161 | sk_common_release(sk); |
1162 | } |
1163 | |
1164 | static void raw6_destroy(struct sock *sk) |
1165 | { |
1166 | lock_sock(sk); |
1167 | ip6_flush_pending_frames(sk); |
1168 | release_sock(sk); |
1169 | |
1170 | inet6_destroy_sock(sk); |
1171 | } |
1172 | |
1173 | static int rawv6_init_sk(struct sock *sk) |
1174 | { |
1175 | struct raw6_sock *rp = raw6_sk(sk); |
1176 | |
1177 | switch (inet_sk(sk)->inet_num) { |
1178 | case IPPROTO_ICMPV6: |
1179 | rp->checksum = 1; |
1180 | rp->offset = 2; |
1181 | break; |
1182 | case IPPROTO_MH: |
1183 | rp->checksum = 1; |
1184 | rp->offset = 4; |
1185 | break; |
1186 | default: |
1187 | break; |
1188 | } |
1189 | return(0); |
1190 | } |
1191 | |
1192 | struct proto rawv6_prot = { |
1193 | .name = "RAWv6", |
1194 | .owner = THIS_MODULE, |
1195 | .close = rawv6_close, |
1196 | .destroy = raw6_destroy, |
1197 | .connect = ip6_datagram_connect, |
1198 | .disconnect = udp_disconnect, |
1199 | .ioctl = rawv6_ioctl, |
1200 | .init = rawv6_init_sk, |
1201 | .setsockopt = rawv6_setsockopt, |
1202 | .getsockopt = rawv6_getsockopt, |
1203 | .sendmsg = rawv6_sendmsg, |
1204 | .recvmsg = rawv6_recvmsg, |
1205 | .bind = rawv6_bind, |
1206 | .backlog_rcv = rawv6_rcv_skb, |
1207 | .hash = raw_hash_sk, |
1208 | .unhash = raw_unhash_sk, |
1209 | .obj_size = sizeof(struct raw6_sock), |
1210 | .h.raw_hash = &raw_v6_hashinfo, |
1211 | #ifdef CONFIG_COMPAT |
1212 | .compat_setsockopt = compat_rawv6_setsockopt, |
1213 | .compat_getsockopt = compat_rawv6_getsockopt, |
1214 | #endif |
1215 | }; |
1216 | |
1217 | #ifdef CONFIG_PROC_FS |
1218 | static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) |
1219 | { |
1220 | struct ipv6_pinfo *np = inet6_sk(sp); |
1221 | struct in6_addr *dest, *src; |
1222 | __u16 destp, srcp; |
1223 | |
1224 | dest = &np->daddr; |
1225 | src = &np->rcv_saddr; |
1226 | destp = 0; |
1227 | srcp = inet_sk(sp)->inet_num; |
1228 | seq_printf(seq, |
1229 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " |
1230 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1231 | i, |
1232 | src->s6_addr32[0], src->s6_addr32[1], |
1233 | src->s6_addr32[2], src->s6_addr32[3], srcp, |
1234 | dest->s6_addr32[0], dest->s6_addr32[1], |
1235 | dest->s6_addr32[2], dest->s6_addr32[3], destp, |
1236 | sp->sk_state, |
1237 | sk_wmem_alloc_get(sp), |
1238 | sk_rmem_alloc_get(sp), |
1239 | 0, 0L, 0, |
1240 | sock_i_uid(sp), 0, |
1241 | sock_i_ino(sp), |
1242 | atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); |
1243 | } |
1244 | |
1245 | static int raw6_seq_show(struct seq_file *seq, void *v) |
1246 | { |
1247 | if (v == SEQ_START_TOKEN) |
1248 | seq_printf(seq, |
1249 | " sl " |
1250 | "local_address " |
1251 | "remote_address " |
1252 | "st tx_queue rx_queue tr tm->when retrnsmt" |
1253 | " uid timeout inode ref pointer drops\n"); |
1254 | else |
1255 | raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); |
1256 | return 0; |
1257 | } |
1258 | |
1259 | static const struct seq_operations raw6_seq_ops = { |
1260 | .start = raw_seq_start, |
1261 | .next = raw_seq_next, |
1262 | .stop = raw_seq_stop, |
1263 | .show = raw6_seq_show, |
1264 | }; |
1265 | |
1266 | static int raw6_seq_open(struct inode *inode, struct file *file) |
1267 | { |
1268 | return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops); |
1269 | } |
1270 | |
1271 | static const struct file_operations raw6_seq_fops = { |
1272 | .owner = THIS_MODULE, |
1273 | .open = raw6_seq_open, |
1274 | .read = seq_read, |
1275 | .llseek = seq_lseek, |
1276 | .release = seq_release_net, |
1277 | }; |
1278 | |
1279 | static int __net_init raw6_init_net(struct net *net) |
1280 | { |
1281 | if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops)) |
1282 | return -ENOMEM; |
1283 | |
1284 | return 0; |
1285 | } |
1286 | |
1287 | static void __net_exit raw6_exit_net(struct net *net) |
1288 | { |
1289 | proc_net_remove(net, "raw6"); |
1290 | } |
1291 | |
1292 | static struct pernet_operations raw6_net_ops = { |
1293 | .init = raw6_init_net, |
1294 | .exit = raw6_exit_net, |
1295 | }; |
1296 | |
1297 | int __init raw6_proc_init(void) |
1298 | { |
1299 | return register_pernet_subsys(&raw6_net_ops); |
1300 | } |
1301 | |
1302 | void raw6_proc_exit(void) |
1303 | { |
1304 | unregister_pernet_subsys(&raw6_net_ops); |
1305 | } |
1306 | #endif /* CONFIG_PROC_FS */ |
1307 | |
1308 | /* Same as inet6_dgram_ops, sans udp_poll. */ |
1309 | static const struct proto_ops inet6_sockraw_ops = { |
1310 | .family = PF_INET6, |
1311 | .owner = THIS_MODULE, |
1312 | .release = inet6_release, |
1313 | .bind = inet6_bind, |
1314 | .connect = inet_dgram_connect, /* ok */ |
1315 | .socketpair = sock_no_socketpair, /* a do nothing */ |
1316 | .accept = sock_no_accept, /* a do nothing */ |
1317 | .getname = inet6_getname, |
1318 | .poll = datagram_poll, /* ok */ |
1319 | .ioctl = inet6_ioctl, /* must change */ |
1320 | .listen = sock_no_listen, /* ok */ |
1321 | .shutdown = inet_shutdown, /* ok */ |
1322 | .setsockopt = sock_common_setsockopt, /* ok */ |
1323 | .getsockopt = sock_common_getsockopt, /* ok */ |
1324 | .sendmsg = inet_sendmsg, /* ok */ |
1325 | .recvmsg = sock_common_recvmsg, /* ok */ |
1326 | .mmap = sock_no_mmap, |
1327 | .sendpage = sock_no_sendpage, |
1328 | #ifdef CONFIG_COMPAT |
1329 | .compat_setsockopt = compat_sock_common_setsockopt, |
1330 | .compat_getsockopt = compat_sock_common_getsockopt, |
1331 | #endif |
1332 | }; |
1333 | |
1334 | static struct inet_protosw rawv6_protosw = { |
1335 | .type = SOCK_RAW, |
1336 | .protocol = IPPROTO_IP, /* wild card */ |
1337 | .prot = &rawv6_prot, |
1338 | .ops = &inet6_sockraw_ops, |
1339 | .no_check = UDP_CSUM_DEFAULT, |
1340 | .flags = INET_PROTOSW_REUSE, |
1341 | }; |
1342 | |
1343 | int __init rawv6_init(void) |
1344 | { |
1345 | int ret; |
1346 | |
1347 | ret = inet6_register_protosw(&rawv6_protosw); |
1348 | if (ret) |
1349 | goto out; |
1350 | out: |
1351 | return ret; |
1352 | } |
1353 | |
1354 | void rawv6_exit(void) |
1355 | { |
1356 | inet6_unregister_protosw(&rawv6_protosw); |
1357 | } |
1358 |
Branches:
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9