Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | * $Id: raw.c,v 1.51 2002/02/01 22:01:04 davem Exp $ | |
11 | * | |
12 | * Fixes: | |
13 | * Hideaki YOSHIFUJI : sin6_scope_id support | |
14 | * YOSHIFUJI,H.@USAGI : raw checksum (RFC2292(bis) compliance) | |
15 | * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data | |
16 | * | |
17 | * This program is free software; you can redistribute it and/or | |
18 | * modify it under the terms of the GNU General Public License | |
19 | * as published by the Free Software Foundation; either version | |
20 | * 2 of the License, or (at your option) any later version. | |
21 | */ | |
22 | ||
23 | #include <linux/errno.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/socket.h> | |
26 | #include <linux/sockios.h> | |
27 | #include <linux/sched.h> | |
28 | #include <linux/net.h> | |
29 | #include <linux/in6.h> | |
30 | #include <linux/netdevice.h> | |
31 | #include <linux/if_arp.h> | |
32 | #include <linux/icmpv6.h> | |
33 | #include <linux/netfilter.h> | |
34 | #include <linux/netfilter_ipv6.h> | |
35 | #include <asm/uaccess.h> | |
36 | #include <asm/ioctls.h> | |
357b40a1 | 37 | #include <asm/bug.h> |
1da177e4 LT |
38 | |
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 | ||
53 | #include <net/rawv6.h> | |
54 | #include <net/xfrm.h> | |
55 | ||
56 | #include <linux/proc_fs.h> | |
57 | #include <linux/seq_file.h> | |
58 | ||
59 | struct hlist_head raw_v6_htable[RAWV6_HTABLE_SIZE]; | |
60 | DEFINE_RWLOCK(raw_v6_lock); | |
61 | ||
62 | static void raw_v6_hash(struct sock *sk) | |
63 | { | |
64 | struct hlist_head *list = &raw_v6_htable[inet_sk(sk)->num & | |
65 | (RAWV6_HTABLE_SIZE - 1)]; | |
66 | ||
67 | write_lock_bh(&raw_v6_lock); | |
68 | sk_add_node(sk, list); | |
69 | sock_prot_inc_use(sk->sk_prot); | |
70 | write_unlock_bh(&raw_v6_lock); | |
71 | } | |
72 | ||
73 | static void raw_v6_unhash(struct sock *sk) | |
74 | { | |
75 | write_lock_bh(&raw_v6_lock); | |
76 | if (sk_del_node_init(sk)) | |
77 | sock_prot_dec_use(sk->sk_prot); | |
78 | write_unlock_bh(&raw_v6_lock); | |
79 | } | |
80 | ||
81 | ||
82 | /* Grumble... icmp and ip_input want to get at this... */ | |
83 | struct sock *__raw_v6_lookup(struct sock *sk, unsigned short num, | |
0bd1b59b AM |
84 | struct in6_addr *loc_addr, struct in6_addr *rmt_addr, |
85 | int dif) | |
1da177e4 LT |
86 | { |
87 | struct hlist_node *node; | |
88 | int is_multicast = ipv6_addr_is_multicast(loc_addr); | |
89 | ||
90 | sk_for_each_from(sk, node) | |
91 | if (inet_sk(sk)->num == num) { | |
92 | struct ipv6_pinfo *np = inet6_sk(sk); | |
93 | ||
94 | if (!ipv6_addr_any(&np->daddr) && | |
95 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
96 | continue; | |
97 | ||
0bd1b59b AM |
98 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) |
99 | continue; | |
100 | ||
1da177e4 LT |
101 | if (!ipv6_addr_any(&np->rcv_saddr)) { |
102 | if (ipv6_addr_equal(&np->rcv_saddr, loc_addr)) | |
103 | goto found; | |
104 | if (is_multicast && | |
105 | inet6_mc_check(sk, loc_addr, rmt_addr)) | |
106 | goto found; | |
107 | continue; | |
108 | } | |
109 | goto found; | |
110 | } | |
111 | sk = NULL; | |
112 | found: | |
113 | return sk; | |
114 | } | |
115 | ||
116 | /* | |
117 | * 0 - deliver | |
118 | * 1 - block | |
119 | */ | |
120 | static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb) | |
121 | { | |
122 | struct icmp6hdr *icmph; | |
123 | struct raw6_sock *rp = raw6_sk(sk); | |
124 | ||
125 | if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) { | |
126 | __u32 *data = &rp->filter.data[0]; | |
127 | int bit_nr; | |
128 | ||
129 | icmph = (struct icmp6hdr *) skb->data; | |
130 | bit_nr = icmph->icmp6_type; | |
131 | ||
132 | return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0; | |
133 | } | |
134 | return 0; | |
135 | } | |
136 | ||
137 | /* | |
138 | * demultiplex raw sockets. | |
139 | * (should consider queueing the skb in the sock receive_queue | |
140 | * without calling rawv6.c) | |
141 | * | |
142 | * Caller owns SKB so we must make clones. | |
143 | */ | |
144 | void ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) | |
145 | { | |
146 | struct in6_addr *saddr; | |
147 | struct in6_addr *daddr; | |
148 | struct sock *sk; | |
149 | __u8 hash; | |
150 | ||
151 | saddr = &skb->nh.ipv6h->saddr; | |
152 | daddr = saddr + 1; | |
153 | ||
154 | hash = nexthdr & (MAX_INET_PROTOS - 1); | |
155 | ||
156 | read_lock(&raw_v6_lock); | |
157 | sk = sk_head(&raw_v6_htable[hash]); | |
158 | ||
159 | /* | |
160 | * The first socket found will be delivered after | |
161 | * delivery to transport protocols. | |
162 | */ | |
163 | ||
164 | if (sk == NULL) | |
165 | goto out; | |
166 | ||
0bd1b59b | 167 | sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr, skb->dev->ifindex); |
1da177e4 LT |
168 | |
169 | while (sk) { | |
170 | if (nexthdr != IPPROTO_ICMPV6 || !icmpv6_filter(sk, skb)) { | |
171 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); | |
172 | ||
173 | /* Not releasing hash table! */ | |
174 | if (clone) | |
175 | rawv6_rcv(sk, clone); | |
176 | } | |
0bd1b59b AM |
177 | sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr, |
178 | skb->dev->ifindex); | |
1da177e4 LT |
179 | } |
180 | out: | |
181 | read_unlock(&raw_v6_lock); | |
182 | } | |
183 | ||
184 | /* This cleans up af_inet6 a bit. -DaveM */ | |
185 | static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
186 | { | |
187 | struct inet_sock *inet = inet_sk(sk); | |
188 | struct ipv6_pinfo *np = inet6_sk(sk); | |
189 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; | |
190 | __u32 v4addr = 0; | |
191 | int addr_type; | |
192 | int err; | |
193 | ||
194 | if (addr_len < SIN6_LEN_RFC2133) | |
195 | return -EINVAL; | |
196 | addr_type = ipv6_addr_type(&addr->sin6_addr); | |
197 | ||
198 | /* Raw sockets are IPv6 only */ | |
199 | if (addr_type == IPV6_ADDR_MAPPED) | |
200 | return(-EADDRNOTAVAIL); | |
201 | ||
202 | lock_sock(sk); | |
203 | ||
204 | err = -EINVAL; | |
205 | if (sk->sk_state != TCP_CLOSE) | |
206 | goto out; | |
207 | ||
208 | /* Check if the address belongs to the host. */ | |
209 | if (addr_type != IPV6_ADDR_ANY) { | |
210 | struct net_device *dev = NULL; | |
211 | ||
212 | if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
213 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
214 | addr->sin6_scope_id) { | |
215 | /* Override any existing binding, if another | |
216 | * one is supplied by user. | |
217 | */ | |
218 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
219 | } | |
220 | ||
221 | /* Binding to link-local address requires an interface */ | |
222 | if (!sk->sk_bound_dev_if) | |
223 | goto out; | |
224 | ||
225 | dev = dev_get_by_index(sk->sk_bound_dev_if); | |
226 | if (!dev) { | |
227 | err = -ENODEV; | |
228 | goto out; | |
229 | } | |
230 | } | |
231 | ||
232 | /* ipv4 addr of the socket is invalid. Only the | |
233 | * unspecified and mapped address have a v4 equivalent. | |
234 | */ | |
235 | v4addr = LOOPBACK4_IPV6; | |
236 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
237 | err = -EADDRNOTAVAIL; | |
238 | if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) { | |
239 | if (dev) | |
240 | dev_put(dev); | |
241 | goto out; | |
242 | } | |
243 | } | |
244 | if (dev) | |
245 | dev_put(dev); | |
246 | } | |
247 | ||
248 | inet->rcv_saddr = inet->saddr = v4addr; | |
249 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); | |
250 | if (!(addr_type & IPV6_ADDR_MULTICAST)) | |
251 | ipv6_addr_copy(&np->saddr, &addr->sin6_addr); | |
252 | err = 0; | |
253 | out: | |
254 | release_sock(sk); | |
255 | return err; | |
256 | } | |
257 | ||
258 | void rawv6_err(struct sock *sk, struct sk_buff *skb, | |
259 | struct inet6_skb_parm *opt, | |
260 | int type, int code, int offset, u32 info) | |
261 | { | |
262 | struct inet_sock *inet = inet_sk(sk); | |
263 | struct ipv6_pinfo *np = inet6_sk(sk); | |
264 | int err; | |
265 | int harderr; | |
266 | ||
267 | /* Report error on raw socket, if: | |
268 | 1. User requested recverr. | |
269 | 2. Socket is connected (otherwise the error indication | |
270 | is useless without recverr and error is hard. | |
271 | */ | |
272 | if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) | |
273 | return; | |
274 | ||
275 | harderr = icmpv6_err_convert(type, code, &err); | |
276 | if (type == ICMPV6_PKT_TOOBIG) | |
277 | harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); | |
278 | ||
279 | if (np->recverr) { | |
280 | u8 *payload = skb->data; | |
281 | if (!inet->hdrincl) | |
282 | payload += offset; | |
283 | ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); | |
284 | } | |
285 | ||
286 | if (np->recverr || harderr) { | |
287 | sk->sk_err = err; | |
288 | sk->sk_error_report(sk); | |
289 | } | |
290 | } | |
291 | ||
292 | static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb) | |
293 | { | |
294 | if ((raw6_sk(sk)->checksum || sk->sk_filter) && | |
295 | skb->ip_summed != CHECKSUM_UNNECESSARY) { | |
296 | if ((unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum))) { | |
297 | /* FIXME: increment a raw6 drops counter here */ | |
298 | kfree_skb(skb); | |
299 | return 0; | |
300 | } | |
301 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
302 | } | |
303 | ||
304 | /* Charge it to the socket. */ | |
305 | if (sock_queue_rcv_skb(sk,skb)<0) { | |
306 | /* FIXME: increment a raw6 drops counter here */ | |
307 | kfree_skb(skb); | |
308 | return 0; | |
309 | } | |
310 | ||
311 | return 0; | |
312 | } | |
313 | ||
314 | /* | |
315 | * This is next to useless... | |
316 | * if we demultiplex in network layer we don't need the extra call | |
317 | * just to queue the skb... | |
318 | * maybe we could have the network decide upon a hint if it | |
319 | * should call raw_rcv for demultiplexing | |
320 | */ | |
321 | int rawv6_rcv(struct sock *sk, struct sk_buff *skb) | |
322 | { | |
323 | struct inet_sock *inet = inet_sk(sk); | |
324 | struct raw6_sock *rp = raw6_sk(sk); | |
325 | ||
326 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { | |
327 | kfree_skb(skb); | |
328 | return NET_RX_DROP; | |
329 | } | |
330 | ||
331 | if (!rp->checksum) | |
332 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
333 | ||
334 | if (skb->ip_summed != CHECKSUM_UNNECESSARY) { | |
335 | if (skb->ip_summed == CHECKSUM_HW) { | |
793245ee PM |
336 | skb_postpull_rcsum(skb, skb->nh.raw, |
337 | skb->h.raw - skb->nh.raw); | |
1da177e4 LT |
338 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
339 | if (csum_ipv6_magic(&skb->nh.ipv6h->saddr, | |
340 | &skb->nh.ipv6h->daddr, | |
341 | skb->len, inet->num, skb->csum)) { | |
342 | LIMIT_NETDEBUG( | |
343 | printk(KERN_DEBUG "raw v6 hw csum failure.\n")); | |
344 | skb->ip_summed = CHECKSUM_NONE; | |
345 | } | |
346 | } | |
347 | if (skb->ip_summed == CHECKSUM_NONE) | |
348 | skb->csum = ~csum_ipv6_magic(&skb->nh.ipv6h->saddr, | |
349 | &skb->nh.ipv6h->daddr, | |
350 | skb->len, inet->num, 0); | |
351 | } | |
352 | ||
353 | if (inet->hdrincl) { | |
354 | if (skb->ip_summed != CHECKSUM_UNNECESSARY && | |
355 | (unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum))) { | |
356 | /* FIXME: increment a raw6 drops counter here */ | |
357 | kfree_skb(skb); | |
358 | return 0; | |
359 | } | |
360 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
361 | } | |
362 | ||
363 | rawv6_rcv_skb(sk, skb); | |
364 | return 0; | |
365 | } | |
366 | ||
367 | ||
368 | /* | |
369 | * This should be easy, if there is something there | |
370 | * we return it, otherwise we block. | |
371 | */ | |
372 | ||
373 | static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk, | |
374 | struct msghdr *msg, size_t len, | |
375 | int noblock, int flags, int *addr_len) | |
376 | { | |
377 | struct ipv6_pinfo *np = inet6_sk(sk); | |
378 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name; | |
379 | struct sk_buff *skb; | |
380 | size_t copied; | |
381 | int err; | |
382 | ||
383 | if (flags & MSG_OOB) | |
384 | return -EOPNOTSUPP; | |
385 | ||
386 | if (addr_len) | |
387 | *addr_len=sizeof(*sin6); | |
388 | ||
389 | if (flags & MSG_ERRQUEUE) | |
390 | return ipv6_recv_error(sk, msg, len); | |
391 | ||
392 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
393 | if (!skb) | |
394 | goto out; | |
395 | ||
396 | copied = skb->len; | |
397 | if (copied > len) { | |
398 | copied = len; | |
399 | msg->msg_flags |= MSG_TRUNC; | |
400 | } | |
401 | ||
402 | if (skb->ip_summed==CHECKSUM_UNNECESSARY) { | |
403 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
404 | } else if (msg->msg_flags&MSG_TRUNC) { | |
405 | if ((unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum))) | |
406 | goto csum_copy_err; | |
407 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
408 | } else { | |
409 | err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov); | |
410 | if (err == -EINVAL) | |
411 | goto csum_copy_err; | |
412 | } | |
413 | if (err) | |
414 | goto out_free; | |
415 | ||
416 | /* Copy the address. */ | |
417 | if (sin6) { | |
418 | sin6->sin6_family = AF_INET6; | |
419 | ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr); | |
420 | sin6->sin6_flowinfo = 0; | |
421 | sin6->sin6_scope_id = 0; | |
422 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
423 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
424 | } | |
425 | ||
426 | sock_recv_timestamp(msg, sk, skb); | |
427 | ||
428 | if (np->rxopt.all) | |
429 | datagram_recv_ctl(sk, msg, skb); | |
430 | ||
431 | err = copied; | |
432 | if (flags & MSG_TRUNC) | |
433 | err = skb->len; | |
434 | ||
435 | out_free: | |
436 | skb_free_datagram(sk, skb); | |
437 | out: | |
438 | return err; | |
439 | ||
440 | csum_copy_err: | |
441 | /* Clear queue. */ | |
442 | if (flags&MSG_PEEK) { | |
443 | int clear = 0; | |
e0f9f858 | 444 | spin_lock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
445 | if (skb == skb_peek(&sk->sk_receive_queue)) { |
446 | __skb_unlink(skb, &sk->sk_receive_queue); | |
447 | clear = 1; | |
448 | } | |
e0f9f858 | 449 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
450 | if (clear) |
451 | kfree_skb(skb); | |
452 | } | |
453 | ||
454 | /* Error for blocking case is chosen to masquerade | |
455 | as some normal condition. | |
456 | */ | |
457 | err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; | |
458 | /* FIXME: increment a raw6 drops counter here */ | |
459 | goto out_free; | |
460 | } | |
461 | ||
462 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl, | |
357b40a1 | 463 | struct raw6_sock *rp) |
1da177e4 LT |
464 | { |
465 | struct sk_buff *skb; | |
466 | int err = 0; | |
357b40a1 HX |
467 | int offset; |
468 | int len; | |
679a8738 | 469 | int total_len; |
1da177e4 | 470 | u32 tmp_csum; |
357b40a1 | 471 | u16 csum; |
1da177e4 LT |
472 | |
473 | if (!rp->checksum) | |
474 | goto send; | |
475 | ||
476 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
477 | goto out; | |
478 | ||
357b40a1 | 479 | offset = rp->offset; |
679a8738 HX |
480 | total_len = inet_sk(sk)->cork.length - (skb->nh.raw - skb->data); |
481 | if (offset >= total_len - 1) { | |
1da177e4 | 482 | err = -EINVAL; |
357b40a1 | 483 | ip6_flush_pending_frames(sk); |
1da177e4 LT |
484 | goto out; |
485 | } | |
486 | ||
487 | /* should be check HW csum miyazawa */ | |
488 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
489 | /* | |
490 | * Only one fragment on the socket. | |
491 | */ | |
492 | tmp_csum = skb->csum; | |
493 | } else { | |
357b40a1 | 494 | struct sk_buff *csum_skb = NULL; |
1da177e4 LT |
495 | tmp_csum = 0; |
496 | ||
497 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
498 | tmp_csum = csum_add(tmp_csum, skb->csum); | |
357b40a1 HX |
499 | |
500 | if (csum_skb) | |
501 | continue; | |
502 | ||
503 | len = skb->len - (skb->h.raw - skb->data); | |
504 | if (offset >= len) { | |
505 | offset -= len; | |
506 | continue; | |
507 | } | |
508 | ||
509 | csum_skb = skb; | |
1da177e4 | 510 | } |
357b40a1 HX |
511 | |
512 | skb = csum_skb; | |
1da177e4 LT |
513 | } |
514 | ||
357b40a1 HX |
515 | offset += skb->h.raw - skb->data; |
516 | if (skb_copy_bits(skb, offset, &csum, 2)) | |
517 | BUG(); | |
518 | ||
1da177e4 | 519 | /* in case cksum was not initialized */ |
357b40a1 HX |
520 | if (unlikely(csum)) |
521 | tmp_csum = csum_sub(tmp_csum, csum); | |
522 | ||
523 | tmp_csum = csum_ipv6_magic(&fl->fl6_src, | |
524 | &fl->fl6_dst, | |
679a8738 | 525 | total_len, fl->proto, tmp_csum); |
357b40a1 HX |
526 | |
527 | if (tmp_csum == 0) | |
528 | tmp_csum = -1; | |
1da177e4 | 529 | |
357b40a1 HX |
530 | csum = tmp_csum; |
531 | if (skb_store_bits(skb, offset, &csum, 2)) | |
532 | BUG(); | |
1da177e4 | 533 | |
1da177e4 LT |
534 | send: |
535 | err = ip6_push_pending_frames(sk); | |
536 | out: | |
537 | return err; | |
538 | } | |
539 | ||
540 | static int rawv6_send_hdrinc(struct sock *sk, void *from, int length, | |
541 | struct flowi *fl, struct rt6_info *rt, | |
542 | unsigned int flags) | |
543 | { | |
3320da89 | 544 | struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 LT |
545 | struct ipv6hdr *iph; |
546 | struct sk_buff *skb; | |
547 | unsigned int hh_len; | |
548 | int err; | |
549 | ||
550 | if (length > rt->u.dst.dev->mtu) { | |
551 | ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu); | |
552 | return -EMSGSIZE; | |
553 | } | |
554 | if (flags&MSG_PROBE) | |
555 | goto out; | |
556 | ||
557 | hh_len = LL_RESERVED_SPACE(rt->u.dst.dev); | |
558 | ||
559 | skb = sock_alloc_send_skb(sk, length+hh_len+15, | |
560 | flags&MSG_DONTWAIT, &err); | |
561 | if (skb == NULL) | |
562 | goto error; | |
563 | skb_reserve(skb, hh_len); | |
564 | ||
565 | skb->priority = sk->sk_priority; | |
566 | skb->dst = dst_clone(&rt->u.dst); | |
567 | ||
568 | skb->nh.ipv6h = iph = (struct ipv6hdr *)skb_put(skb, length); | |
569 | ||
570 | skb->ip_summed = CHECKSUM_NONE; | |
571 | ||
572 | skb->h.raw = skb->nh.raw; | |
573 | err = memcpy_fromiovecend((void *)iph, from, 0, length); | |
574 | if (err) | |
575 | goto error_fault; | |
576 | ||
577 | IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS); | |
578 | err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, rt->u.dst.dev, | |
579 | dst_output); | |
580 | if (err > 0) | |
3320da89 | 581 | err = np->recverr ? net_xmit_errno(err) : 0; |
1da177e4 LT |
582 | if (err) |
583 | goto error; | |
584 | out: | |
585 | return 0; | |
586 | ||
587 | error_fault: | |
588 | err = -EFAULT; | |
589 | kfree_skb(skb); | |
590 | error: | |
591 | IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS); | |
592 | return err; | |
593 | } | |
594 | ||
595 | static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) | |
596 | { | |
597 | struct iovec *iov; | |
598 | u8 __user *type = NULL; | |
599 | u8 __user *code = NULL; | |
600 | int probed = 0; | |
601 | int i; | |
602 | ||
603 | if (!msg->msg_iov) | |
604 | return; | |
605 | ||
606 | for (i = 0; i < msg->msg_iovlen; i++) { | |
607 | iov = &msg->msg_iov[i]; | |
608 | if (!iov) | |
609 | continue; | |
610 | ||
611 | switch (fl->proto) { | |
612 | case IPPROTO_ICMPV6: | |
613 | /* check if one-byte field is readable or not. */ | |
614 | if (iov->iov_base && iov->iov_len < 1) | |
615 | break; | |
616 | ||
617 | if (!type) { | |
618 | type = iov->iov_base; | |
619 | /* check if code field is readable or not. */ | |
620 | if (iov->iov_len > 1) | |
621 | code = type + 1; | |
622 | } else if (!code) | |
623 | code = iov->iov_base; | |
624 | ||
625 | if (type && code) { | |
626 | get_user(fl->fl_icmp_type, type); | |
627 | __get_user(fl->fl_icmp_code, code); | |
628 | probed = 1; | |
629 | } | |
630 | break; | |
631 | default: | |
632 | probed = 1; | |
633 | break; | |
634 | } | |
635 | if (probed) | |
636 | break; | |
637 | } | |
638 | } | |
639 | ||
640 | static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, | |
641 | struct msghdr *msg, size_t len) | |
642 | { | |
643 | struct ipv6_txoptions opt_space; | |
644 | struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
645 | struct in6_addr *daddr, *final_p = NULL, final; | |
646 | struct inet_sock *inet = inet_sk(sk); | |
647 | struct ipv6_pinfo *np = inet6_sk(sk); | |
648 | struct raw6_sock *rp = raw6_sk(sk); | |
649 | struct ipv6_txoptions *opt = NULL; | |
650 | struct ip6_flowlabel *flowlabel = NULL; | |
651 | struct dst_entry *dst = NULL; | |
652 | struct flowi fl; | |
653 | int addr_len = msg->msg_namelen; | |
654 | int hlimit = -1; | |
655 | u16 proto; | |
656 | int err; | |
657 | ||
658 | /* Rough check on arithmetic overflow, | |
659 | better check is made in ip6_build_xmit | |
660 | */ | |
661 | if (len < 0) | |
662 | return -EMSGSIZE; | |
663 | ||
664 | /* Mirror BSD error message compatibility */ | |
665 | if (msg->msg_flags & MSG_OOB) | |
666 | return -EOPNOTSUPP; | |
667 | ||
668 | /* | |
669 | * Get and verify the address. | |
670 | */ | |
671 | memset(&fl, 0, sizeof(fl)); | |
672 | ||
673 | if (sin6) { | |
674 | if (addr_len < SIN6_LEN_RFC2133) | |
675 | return -EINVAL; | |
676 | ||
677 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) | |
678 | return(-EAFNOSUPPORT); | |
679 | ||
680 | /* port is the proto value [0..255] carried in nexthdr */ | |
681 | proto = ntohs(sin6->sin6_port); | |
682 | ||
683 | if (!proto) | |
684 | proto = inet->num; | |
685 | else if (proto != inet->num) | |
686 | return(-EINVAL); | |
687 | ||
688 | if (proto > 255) | |
689 | return(-EINVAL); | |
690 | ||
691 | daddr = &sin6->sin6_addr; | |
692 | if (np->sndflow) { | |
693 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; | |
694 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
695 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
696 | if (flowlabel == NULL) | |
697 | return -EINVAL; | |
698 | daddr = &flowlabel->dst; | |
699 | } | |
700 | } | |
701 | ||
702 | /* | |
703 | * Otherwise it will be difficult to maintain | |
704 | * sk->sk_dst_cache. | |
705 | */ | |
706 | if (sk->sk_state == TCP_ESTABLISHED && | |
707 | ipv6_addr_equal(daddr, &np->daddr)) | |
708 | daddr = &np->daddr; | |
709 | ||
710 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
711 | sin6->sin6_scope_id && | |
712 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
713 | fl.oif = sin6->sin6_scope_id; | |
714 | } else { | |
715 | if (sk->sk_state != TCP_ESTABLISHED) | |
716 | return -EDESTADDRREQ; | |
717 | ||
718 | proto = inet->num; | |
719 | daddr = &np->daddr; | |
720 | fl.fl6_flowlabel = np->flow_label; | |
721 | } | |
722 | ||
723 | if (ipv6_addr_any(daddr)) { | |
724 | /* | |
725 | * unspecified destination address | |
726 | * treated as error... is this correct ? | |
727 | */ | |
728 | fl6_sock_release(flowlabel); | |
729 | return(-EINVAL); | |
730 | } | |
731 | ||
732 | if (fl.oif == 0) | |
733 | fl.oif = sk->sk_bound_dev_if; | |
734 | ||
735 | if (msg->msg_controllen) { | |
736 | opt = &opt_space; | |
737 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
738 | opt->tot_len = sizeof(struct ipv6_txoptions); | |
739 | ||
740 | err = datagram_send_ctl(msg, &fl, opt, &hlimit); | |
741 | if (err < 0) { | |
742 | fl6_sock_release(flowlabel); | |
743 | return err; | |
744 | } | |
745 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { | |
746 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
747 | if (flowlabel == NULL) | |
748 | return -EINVAL; | |
749 | } | |
750 | if (!(opt->opt_nflen|opt->opt_flen)) | |
751 | opt = NULL; | |
752 | } | |
753 | if (opt == NULL) | |
754 | opt = np->opt; | |
755 | if (flowlabel) | |
756 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
757 | ||
758 | fl.proto = proto; | |
759 | rawv6_probe_proto_opt(&fl, msg); | |
760 | ||
761 | ipv6_addr_copy(&fl.fl6_dst, daddr); | |
762 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) | |
763 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
764 | ||
765 | /* merge ip6_build_xmit from ip6_output */ | |
766 | if (opt && opt->srcrt) { | |
767 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
768 | ipv6_addr_copy(&final, &fl.fl6_dst); | |
769 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
770 | final_p = &final; | |
771 | } | |
772 | ||
773 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) | |
774 | fl.oif = np->mcast_oif; | |
775 | ||
776 | err = ip6_dst_lookup(sk, &dst, &fl); | |
777 | if (err) | |
778 | goto out; | |
779 | if (final_p) | |
780 | ipv6_addr_copy(&fl.fl6_dst, final_p); | |
781 | ||
782 | if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) { | |
783 | dst_release(dst); | |
784 | goto out; | |
785 | } | |
786 | ||
787 | if (hlimit < 0) { | |
788 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) | |
789 | hlimit = np->mcast_hops; | |
790 | else | |
791 | hlimit = np->hop_limit; | |
792 | if (hlimit < 0) | |
793 | hlimit = dst_metric(dst, RTAX_HOPLIMIT); | |
794 | if (hlimit < 0) | |
795 | hlimit = ipv6_get_hoplimit(dst->dev); | |
796 | } | |
797 | ||
798 | if (msg->msg_flags&MSG_CONFIRM) | |
799 | goto do_confirm; | |
800 | ||
801 | back_from_confirm: | |
802 | if (inet->hdrincl) { | |
803 | err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags); | |
804 | } else { | |
805 | lock_sock(sk); | |
806 | err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, len, 0, | |
807 | hlimit, opt, &fl, (struct rt6_info*)dst, msg->msg_flags); | |
808 | ||
809 | if (err) | |
810 | ip6_flush_pending_frames(sk); | |
811 | else if (!(msg->msg_flags & MSG_MORE)) | |
357b40a1 | 812 | err = rawv6_push_pending_frames(sk, &fl, rp); |
1da177e4 LT |
813 | } |
814 | done: | |
815 | ip6_dst_store(sk, dst, | |
816 | ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? | |
817 | &np->daddr : NULL); | |
1da177e4 LT |
818 | |
819 | release_sock(sk); | |
820 | out: | |
821 | fl6_sock_release(flowlabel); | |
822 | return err<0?err:len; | |
823 | do_confirm: | |
824 | dst_confirm(dst); | |
825 | if (!(msg->msg_flags & MSG_PROBE) || len) | |
826 | goto back_from_confirm; | |
827 | err = 0; | |
828 | goto done; | |
829 | } | |
830 | ||
831 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, | |
832 | char __user *optval, int optlen) | |
833 | { | |
834 | switch (optname) { | |
835 | case ICMPV6_FILTER: | |
836 | if (optlen > sizeof(struct icmp6_filter)) | |
837 | optlen = sizeof(struct icmp6_filter); | |
838 | if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) | |
839 | return -EFAULT; | |
840 | return 0; | |
841 | default: | |
842 | return -ENOPROTOOPT; | |
843 | }; | |
844 | ||
845 | return 0; | |
846 | } | |
847 | ||
848 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, | |
849 | char __user *optval, int __user *optlen) | |
850 | { | |
851 | int len; | |
852 | ||
853 | switch (optname) { | |
854 | case ICMPV6_FILTER: | |
855 | if (get_user(len, optlen)) | |
856 | return -EFAULT; | |
857 | if (len < 0) | |
858 | return -EINVAL; | |
859 | if (len > sizeof(struct icmp6_filter)) | |
860 | len = sizeof(struct icmp6_filter); | |
861 | if (put_user(len, optlen)) | |
862 | return -EFAULT; | |
863 | if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) | |
864 | return -EFAULT; | |
865 | return 0; | |
866 | default: | |
867 | return -ENOPROTOOPT; | |
868 | }; | |
869 | ||
870 | return 0; | |
871 | } | |
872 | ||
873 | ||
874 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, | |
875 | char __user *optval, int optlen) | |
876 | { | |
877 | struct raw6_sock *rp = raw6_sk(sk); | |
878 | int val; | |
879 | ||
880 | switch(level) { | |
881 | case SOL_RAW: | |
882 | break; | |
883 | ||
884 | case SOL_ICMPV6: | |
885 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
886 | return -EOPNOTSUPP; | |
887 | return rawv6_seticmpfilter(sk, level, optname, optval, | |
888 | optlen); | |
889 | case SOL_IPV6: | |
890 | if (optname == IPV6_CHECKSUM) | |
891 | break; | |
892 | default: | |
893 | return ipv6_setsockopt(sk, level, optname, optval, | |
894 | optlen); | |
895 | }; | |
896 | ||
897 | if (get_user(val, (int __user *)optval)) | |
898 | return -EFAULT; | |
899 | ||
900 | switch (optname) { | |
901 | case IPV6_CHECKSUM: | |
902 | /* You may get strange result with a positive odd offset; | |
903 | RFC2292bis agrees with me. */ | |
904 | if (val > 0 && (val&1)) | |
905 | return(-EINVAL); | |
906 | if (val < 0) { | |
907 | rp->checksum = 0; | |
908 | } else { | |
909 | rp->checksum = 1; | |
910 | rp->offset = val; | |
911 | } | |
912 | ||
913 | return 0; | |
914 | break; | |
915 | ||
916 | default: | |
917 | return(-ENOPROTOOPT); | |
918 | } | |
919 | } | |
920 | ||
921 | static int rawv6_getsockopt(struct sock *sk, int level, int optname, | |
922 | char __user *optval, int __user *optlen) | |
923 | { | |
924 | struct raw6_sock *rp = raw6_sk(sk); | |
925 | int val, len; | |
926 | ||
927 | switch(level) { | |
928 | case SOL_RAW: | |
929 | break; | |
930 | ||
931 | case SOL_ICMPV6: | |
932 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
933 | return -EOPNOTSUPP; | |
934 | return rawv6_geticmpfilter(sk, level, optname, optval, | |
935 | optlen); | |
936 | case SOL_IPV6: | |
937 | if (optname == IPV6_CHECKSUM) | |
938 | break; | |
939 | default: | |
940 | return ipv6_getsockopt(sk, level, optname, optval, | |
941 | optlen); | |
942 | }; | |
943 | ||
944 | if (get_user(len,optlen)) | |
945 | return -EFAULT; | |
946 | ||
947 | switch (optname) { | |
948 | case IPV6_CHECKSUM: | |
949 | if (rp->checksum == 0) | |
950 | val = -1; | |
951 | else | |
952 | val = rp->offset; | |
953 | break; | |
954 | ||
955 | default: | |
956 | return -ENOPROTOOPT; | |
957 | } | |
958 | ||
959 | len = min_t(unsigned int, sizeof(int), len); | |
960 | ||
961 | if (put_user(len, optlen)) | |
962 | return -EFAULT; | |
963 | if (copy_to_user(optval,&val,len)) | |
964 | return -EFAULT; | |
965 | return 0; | |
966 | } | |
967 | ||
968 | static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) | |
969 | { | |
970 | switch(cmd) { | |
971 | case SIOCOUTQ: | |
972 | { | |
973 | int amount = atomic_read(&sk->sk_wmem_alloc); | |
974 | return put_user(amount, (int __user *)arg); | |
975 | } | |
976 | case SIOCINQ: | |
977 | { | |
978 | struct sk_buff *skb; | |
979 | int amount = 0; | |
980 | ||
e0f9f858 | 981 | spin_lock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
982 | skb = skb_peek(&sk->sk_receive_queue); |
983 | if (skb != NULL) | |
984 | amount = skb->tail - skb->h.raw; | |
e0f9f858 | 985 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
986 | return put_user(amount, (int __user *)arg); |
987 | } | |
988 | ||
989 | default: | |
990 | return -ENOIOCTLCMD; | |
991 | } | |
992 | } | |
993 | ||
994 | static void rawv6_close(struct sock *sk, long timeout) | |
995 | { | |
996 | if (inet_sk(sk)->num == IPPROTO_RAW) | |
997 | ip6_ra_control(sk, -1, NULL); | |
998 | ||
999 | sk_common_release(sk); | |
1000 | } | |
1001 | ||
1002 | static int rawv6_init_sk(struct sock *sk) | |
1003 | { | |
1004 | if (inet_sk(sk)->num == IPPROTO_ICMPV6) { | |
1005 | struct raw6_sock *rp = raw6_sk(sk); | |
1006 | rp->checksum = 1; | |
1007 | rp->offset = 2; | |
1008 | } | |
1009 | return(0); | |
1010 | } | |
1011 | ||
1012 | struct proto rawv6_prot = { | |
1013 | .name = "RAWv6", | |
1014 | .owner = THIS_MODULE, | |
1015 | .close = rawv6_close, | |
1016 | .connect = ip6_datagram_connect, | |
1017 | .disconnect = udp_disconnect, | |
1018 | .ioctl = rawv6_ioctl, | |
1019 | .init = rawv6_init_sk, | |
1020 | .destroy = inet6_destroy_sock, | |
1021 | .setsockopt = rawv6_setsockopt, | |
1022 | .getsockopt = rawv6_getsockopt, | |
1023 | .sendmsg = rawv6_sendmsg, | |
1024 | .recvmsg = rawv6_recvmsg, | |
1025 | .bind = rawv6_bind, | |
1026 | .backlog_rcv = rawv6_rcv_skb, | |
1027 | .hash = raw_v6_hash, | |
1028 | .unhash = raw_v6_unhash, | |
1029 | .obj_size = sizeof(struct raw6_sock), | |
1030 | }; | |
1031 | ||
1032 | #ifdef CONFIG_PROC_FS | |
1033 | struct raw6_iter_state { | |
1034 | int bucket; | |
1035 | }; | |
1036 | ||
1037 | #define raw6_seq_private(seq) ((struct raw6_iter_state *)(seq)->private) | |
1038 | ||
1039 | static struct sock *raw6_get_first(struct seq_file *seq) | |
1040 | { | |
1041 | struct sock *sk; | |
1042 | struct hlist_node *node; | |
1043 | struct raw6_iter_state* state = raw6_seq_private(seq); | |
1044 | ||
1045 | for (state->bucket = 0; state->bucket < RAWV6_HTABLE_SIZE; ++state->bucket) | |
1046 | sk_for_each(sk, node, &raw_v6_htable[state->bucket]) | |
1047 | if (sk->sk_family == PF_INET6) | |
1048 | goto out; | |
1049 | sk = NULL; | |
1050 | out: | |
1051 | return sk; | |
1052 | } | |
1053 | ||
1054 | static struct sock *raw6_get_next(struct seq_file *seq, struct sock *sk) | |
1055 | { | |
1056 | struct raw6_iter_state* state = raw6_seq_private(seq); | |
1057 | ||
1058 | do { | |
1059 | sk = sk_next(sk); | |
1060 | try_again: | |
1061 | ; | |
1062 | } while (sk && sk->sk_family != PF_INET6); | |
1063 | ||
1064 | if (!sk && ++state->bucket < RAWV6_HTABLE_SIZE) { | |
1065 | sk = sk_head(&raw_v6_htable[state->bucket]); | |
1066 | goto try_again; | |
1067 | } | |
1068 | return sk; | |
1069 | } | |
1070 | ||
1071 | static struct sock *raw6_get_idx(struct seq_file *seq, loff_t pos) | |
1072 | { | |
1073 | struct sock *sk = raw6_get_first(seq); | |
1074 | if (sk) | |
1075 | while (pos && (sk = raw6_get_next(seq, sk)) != NULL) | |
1076 | --pos; | |
1077 | return pos ? NULL : sk; | |
1078 | } | |
1079 | ||
1080 | static void *raw6_seq_start(struct seq_file *seq, loff_t *pos) | |
1081 | { | |
1082 | read_lock(&raw_v6_lock); | |
1083 | return *pos ? raw6_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | |
1084 | } | |
1085 | ||
1086 | static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1087 | { | |
1088 | struct sock *sk; | |
1089 | ||
1090 | if (v == SEQ_START_TOKEN) | |
1091 | sk = raw6_get_first(seq); | |
1092 | else | |
1093 | sk = raw6_get_next(seq, v); | |
1094 | ++*pos; | |
1095 | return sk; | |
1096 | } | |
1097 | ||
1098 | static void raw6_seq_stop(struct seq_file *seq, void *v) | |
1099 | { | |
1100 | read_unlock(&raw_v6_lock); | |
1101 | } | |
1102 | ||
1103 | static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) | |
1104 | { | |
1105 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1106 | struct in6_addr *dest, *src; | |
1107 | __u16 destp, srcp; | |
1108 | ||
1109 | dest = &np->daddr; | |
1110 | src = &np->rcv_saddr; | |
1111 | destp = 0; | |
1112 | srcp = inet_sk(sp)->num; | |
1113 | seq_printf(seq, | |
1114 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
1115 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n", | |
1116 | i, | |
1117 | src->s6_addr32[0], src->s6_addr32[1], | |
1118 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1119 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1120 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1121 | sp->sk_state, | |
1122 | atomic_read(&sp->sk_wmem_alloc), | |
1123 | atomic_read(&sp->sk_rmem_alloc), | |
1124 | 0, 0L, 0, | |
1125 | sock_i_uid(sp), 0, | |
1126 | sock_i_ino(sp), | |
1127 | atomic_read(&sp->sk_refcnt), sp); | |
1128 | } | |
1129 | ||
1130 | static int raw6_seq_show(struct seq_file *seq, void *v) | |
1131 | { | |
1132 | if (v == SEQ_START_TOKEN) | |
1133 | seq_printf(seq, | |
1134 | " sl " | |
1135 | "local_address " | |
1136 | "remote_address " | |
1137 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
1138 | " uid timeout inode\n"); | |
1139 | else | |
1140 | raw6_sock_seq_show(seq, v, raw6_seq_private(seq)->bucket); | |
1141 | return 0; | |
1142 | } | |
1143 | ||
1144 | static struct seq_operations raw6_seq_ops = { | |
1145 | .start = raw6_seq_start, | |
1146 | .next = raw6_seq_next, | |
1147 | .stop = raw6_seq_stop, | |
1148 | .show = raw6_seq_show, | |
1149 | }; | |
1150 | ||
1151 | static int raw6_seq_open(struct inode *inode, struct file *file) | |
1152 | { | |
1153 | struct seq_file *seq; | |
1154 | int rc = -ENOMEM; | |
1155 | struct raw6_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL); | |
1156 | if (!s) | |
1157 | goto out; | |
1158 | rc = seq_open(file, &raw6_seq_ops); | |
1159 | if (rc) | |
1160 | goto out_kfree; | |
1161 | seq = file->private_data; | |
1162 | seq->private = s; | |
1163 | memset(s, 0, sizeof(*s)); | |
1164 | out: | |
1165 | return rc; | |
1166 | out_kfree: | |
1167 | kfree(s); | |
1168 | goto out; | |
1169 | } | |
1170 | ||
1171 | static struct file_operations raw6_seq_fops = { | |
1172 | .owner = THIS_MODULE, | |
1173 | .open = raw6_seq_open, | |
1174 | .read = seq_read, | |
1175 | .llseek = seq_lseek, | |
1176 | .release = seq_release_private, | |
1177 | }; | |
1178 | ||
1179 | int __init raw6_proc_init(void) | |
1180 | { | |
1181 | if (!proc_net_fops_create("raw6", S_IRUGO, &raw6_seq_fops)) | |
1182 | return -ENOMEM; | |
1183 | return 0; | |
1184 | } | |
1185 | ||
1186 | void raw6_proc_exit(void) | |
1187 | { | |
1188 | proc_net_remove("raw6"); | |
1189 | } | |
1190 | #endif /* CONFIG_PROC_FS */ |