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> | |
3305b80c | 35 | #include <linux/skbuff.h> |
1da177e4 LT |
36 | #include <asm/uaccess.h> |
37 | #include <asm/ioctls.h> | |
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> | |
c752f073 | 52 | #include <net/tcp_states.h> |
1da177e4 LT |
53 | |
54 | #include <net/rawv6.h> | |
55 | #include <net/xfrm.h> | |
56 | ||
57 | #include <linux/proc_fs.h> | |
58 | #include <linux/seq_file.h> | |
59 | ||
60 | struct hlist_head raw_v6_htable[RAWV6_HTABLE_SIZE]; | |
61 | DEFINE_RWLOCK(raw_v6_lock); | |
62 | ||
63 | static void raw_v6_hash(struct sock *sk) | |
64 | { | |
65 | struct hlist_head *list = &raw_v6_htable[inet_sk(sk)->num & | |
66 | (RAWV6_HTABLE_SIZE - 1)]; | |
67 | ||
68 | write_lock_bh(&raw_v6_lock); | |
69 | sk_add_node(sk, list); | |
70 | sock_prot_inc_use(sk->sk_prot); | |
71 | write_unlock_bh(&raw_v6_lock); | |
72 | } | |
73 | ||
74 | static void raw_v6_unhash(struct sock *sk) | |
75 | { | |
76 | write_lock_bh(&raw_v6_lock); | |
77 | if (sk_del_node_init(sk)) | |
78 | sock_prot_dec_use(sk->sk_prot); | |
79 | write_unlock_bh(&raw_v6_lock); | |
80 | } | |
81 | ||
82 | ||
83 | /* Grumble... icmp and ip_input want to get at this... */ | |
84 | struct sock *__raw_v6_lookup(struct sock *sk, unsigned short num, | |
0bd1b59b AM |
85 | struct in6_addr *loc_addr, struct in6_addr *rmt_addr, |
86 | int dif) | |
1da177e4 LT |
87 | { |
88 | struct hlist_node *node; | |
89 | int is_multicast = ipv6_addr_is_multicast(loc_addr); | |
90 | ||
91 | sk_for_each_from(sk, node) | |
92 | if (inet_sk(sk)->num == num) { | |
93 | struct ipv6_pinfo *np = inet6_sk(sk); | |
94 | ||
95 | if (!ipv6_addr_any(&np->daddr) && | |
96 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
97 | continue; | |
98 | ||
0bd1b59b AM |
99 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) |
100 | continue; | |
101 | ||
1da177e4 LT |
102 | if (!ipv6_addr_any(&np->rcv_saddr)) { |
103 | if (ipv6_addr_equal(&np->rcv_saddr, loc_addr)) | |
104 | goto found; | |
105 | if (is_multicast && | |
106 | inet6_mc_check(sk, loc_addr, rmt_addr)) | |
107 | goto found; | |
108 | continue; | |
109 | } | |
110 | goto found; | |
111 | } | |
112 | sk = NULL; | |
113 | found: | |
114 | return sk; | |
115 | } | |
116 | ||
117 | /* | |
118 | * 0 - deliver | |
119 | * 1 - block | |
120 | */ | |
121 | static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb) | |
122 | { | |
123 | struct icmp6hdr *icmph; | |
124 | struct raw6_sock *rp = raw6_sk(sk); | |
125 | ||
126 | if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) { | |
127 | __u32 *data = &rp->filter.data[0]; | |
128 | int bit_nr; | |
129 | ||
130 | icmph = (struct icmp6hdr *) skb->data; | |
131 | bit_nr = icmph->icmp6_type; | |
132 | ||
133 | return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0; | |
134 | } | |
135 | return 0; | |
136 | } | |
137 | ||
138 | /* | |
139 | * demultiplex raw sockets. | |
140 | * (should consider queueing the skb in the sock receive_queue | |
141 | * without calling rawv6.c) | |
142 | * | |
143 | * Caller owns SKB so we must make clones. | |
144 | */ | |
d13964f4 | 145 | int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) |
1da177e4 LT |
146 | { |
147 | struct in6_addr *saddr; | |
148 | struct in6_addr *daddr; | |
149 | struct sock *sk; | |
d13964f4 | 150 | int delivered = 0; |
1da177e4 LT |
151 | __u8 hash; |
152 | ||
153 | saddr = &skb->nh.ipv6h->saddr; | |
154 | daddr = saddr + 1; | |
155 | ||
156 | hash = nexthdr & (MAX_INET_PROTOS - 1); | |
157 | ||
158 | read_lock(&raw_v6_lock); | |
159 | sk = sk_head(&raw_v6_htable[hash]); | |
160 | ||
161 | /* | |
162 | * The first socket found will be delivered after | |
163 | * delivery to transport protocols. | |
164 | */ | |
165 | ||
166 | if (sk == NULL) | |
167 | goto out; | |
168 | ||
2dac4b96 | 169 | sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr, IP6CB(skb)->iif); |
1da177e4 LT |
170 | |
171 | while (sk) { | |
d13964f4 | 172 | delivered = 1; |
1da177e4 LT |
173 | if (nexthdr != IPPROTO_ICMPV6 || !icmpv6_filter(sk, skb)) { |
174 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); | |
175 | ||
176 | /* Not releasing hash table! */ | |
9fb9cbb1 YK |
177 | if (clone) { |
178 | nf_reset(clone); | |
1da177e4 | 179 | rawv6_rcv(sk, clone); |
9fb9cbb1 | 180 | } |
1da177e4 | 181 | } |
0bd1b59b | 182 | sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr, |
2dac4b96 | 183 | IP6CB(skb)->iif); |
1da177e4 LT |
184 | } |
185 | out: | |
186 | read_unlock(&raw_v6_lock); | |
d13964f4 | 187 | return delivered; |
1da177e4 LT |
188 | } |
189 | ||
190 | /* This cleans up af_inet6 a bit. -DaveM */ | |
191 | static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
192 | { | |
193 | struct inet_sock *inet = inet_sk(sk); | |
194 | struct ipv6_pinfo *np = inet6_sk(sk); | |
195 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; | |
196 | __u32 v4addr = 0; | |
197 | int addr_type; | |
198 | int err; | |
199 | ||
200 | if (addr_len < SIN6_LEN_RFC2133) | |
201 | return -EINVAL; | |
202 | addr_type = ipv6_addr_type(&addr->sin6_addr); | |
203 | ||
204 | /* Raw sockets are IPv6 only */ | |
205 | if (addr_type == IPV6_ADDR_MAPPED) | |
206 | return(-EADDRNOTAVAIL); | |
207 | ||
208 | lock_sock(sk); | |
209 | ||
210 | err = -EINVAL; | |
211 | if (sk->sk_state != TCP_CLOSE) | |
212 | goto out; | |
213 | ||
214 | /* Check if the address belongs to the host. */ | |
215 | if (addr_type != IPV6_ADDR_ANY) { | |
216 | struct net_device *dev = NULL; | |
217 | ||
218 | if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
219 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
220 | addr->sin6_scope_id) { | |
221 | /* Override any existing binding, if another | |
222 | * one is supplied by user. | |
223 | */ | |
224 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
225 | } | |
226 | ||
227 | /* Binding to link-local address requires an interface */ | |
228 | if (!sk->sk_bound_dev_if) | |
229 | goto out; | |
230 | ||
231 | dev = dev_get_by_index(sk->sk_bound_dev_if); | |
232 | if (!dev) { | |
233 | err = -ENODEV; | |
234 | goto out; | |
235 | } | |
236 | } | |
237 | ||
238 | /* ipv4 addr of the socket is invalid. Only the | |
239 | * unspecified and mapped address have a v4 equivalent. | |
240 | */ | |
241 | v4addr = LOOPBACK4_IPV6; | |
242 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
243 | err = -EADDRNOTAVAIL; | |
244 | if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) { | |
245 | if (dev) | |
246 | dev_put(dev); | |
247 | goto out; | |
248 | } | |
249 | } | |
250 | if (dev) | |
251 | dev_put(dev); | |
252 | } | |
253 | ||
254 | inet->rcv_saddr = inet->saddr = v4addr; | |
255 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); | |
256 | if (!(addr_type & IPV6_ADDR_MULTICAST)) | |
257 | ipv6_addr_copy(&np->saddr, &addr->sin6_addr); | |
258 | err = 0; | |
259 | out: | |
260 | release_sock(sk); | |
261 | return err; | |
262 | } | |
263 | ||
264 | void rawv6_err(struct sock *sk, struct sk_buff *skb, | |
265 | struct inet6_skb_parm *opt, | |
266 | int type, int code, int offset, u32 info) | |
267 | { | |
268 | struct inet_sock *inet = inet_sk(sk); | |
269 | struct ipv6_pinfo *np = inet6_sk(sk); | |
270 | int err; | |
271 | int harderr; | |
272 | ||
273 | /* Report error on raw socket, if: | |
274 | 1. User requested recverr. | |
275 | 2. Socket is connected (otherwise the error indication | |
276 | is useless without recverr and error is hard. | |
277 | */ | |
278 | if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) | |
279 | return; | |
280 | ||
281 | harderr = icmpv6_err_convert(type, code, &err); | |
282 | if (type == ICMPV6_PKT_TOOBIG) | |
283 | harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); | |
284 | ||
285 | if (np->recverr) { | |
286 | u8 *payload = skb->data; | |
287 | if (!inet->hdrincl) | |
288 | payload += offset; | |
289 | ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); | |
290 | } | |
291 | ||
292 | if (np->recverr || harderr) { | |
293 | sk->sk_err = err; | |
294 | sk->sk_error_report(sk); | |
295 | } | |
296 | } | |
297 | ||
298 | static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb) | |
299 | { | |
300 | if ((raw6_sk(sk)->checksum || sk->sk_filter) && | |
fb286bb2 HX |
301 | skb_checksum_complete(skb)) { |
302 | /* FIXME: increment a raw6 drops counter here */ | |
303 | kfree_skb(skb); | |
304 | return 0; | |
1da177e4 LT |
305 | } |
306 | ||
307 | /* Charge it to the socket. */ | |
308 | if (sock_queue_rcv_skb(sk,skb)<0) { | |
309 | /* FIXME: increment a raw6 drops counter here */ | |
310 | kfree_skb(skb); | |
311 | return 0; | |
312 | } | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
317 | /* | |
318 | * This is next to useless... | |
319 | * if we demultiplex in network layer we don't need the extra call | |
320 | * just to queue the skb... | |
321 | * maybe we could have the network decide upon a hint if it | |
322 | * should call raw_rcv for demultiplexing | |
323 | */ | |
324 | int rawv6_rcv(struct sock *sk, struct sk_buff *skb) | |
325 | { | |
326 | struct inet_sock *inet = inet_sk(sk); | |
327 | struct raw6_sock *rp = raw6_sk(sk); | |
328 | ||
329 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { | |
330 | kfree_skb(skb); | |
331 | return NET_RX_DROP; | |
332 | } | |
333 | ||
334 | if (!rp->checksum) | |
335 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
336 | ||
fb286bb2 HX |
337 | if (skb->ip_summed == CHECKSUM_HW) { |
338 | skb_postpull_rcsum(skb, skb->nh.raw, | |
339 | skb->h.raw - skb->nh.raw); | |
340 | if (!csum_ipv6_magic(&skb->nh.ipv6h->saddr, | |
341 | &skb->nh.ipv6h->daddr, | |
342 | skb->len, inet->num, skb->csum)) | |
1da177e4 | 343 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1da177e4 | 344 | } |
fb286bb2 HX |
345 | if (skb->ip_summed != CHECKSUM_UNNECESSARY) |
346 | skb->csum = ~csum_ipv6_magic(&skb->nh.ipv6h->saddr, | |
347 | &skb->nh.ipv6h->daddr, | |
348 | skb->len, inet->num, 0); | |
1da177e4 LT |
349 | |
350 | if (inet->hdrincl) { | |
fb286bb2 | 351 | if (skb_checksum_complete(skb)) { |
1da177e4 LT |
352 | /* FIXME: increment a raw6 drops counter here */ |
353 | kfree_skb(skb); | |
354 | return 0; | |
355 | } | |
1da177e4 LT |
356 | } |
357 | ||
358 | rawv6_rcv_skb(sk, skb); | |
359 | return 0; | |
360 | } | |
361 | ||
362 | ||
363 | /* | |
364 | * This should be easy, if there is something there | |
365 | * we return it, otherwise we block. | |
366 | */ | |
367 | ||
368 | static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk, | |
369 | struct msghdr *msg, size_t len, | |
370 | int noblock, int flags, int *addr_len) | |
371 | { | |
372 | struct ipv6_pinfo *np = inet6_sk(sk); | |
373 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name; | |
374 | struct sk_buff *skb; | |
375 | size_t copied; | |
376 | int err; | |
377 | ||
378 | if (flags & MSG_OOB) | |
379 | return -EOPNOTSUPP; | |
380 | ||
381 | if (addr_len) | |
382 | *addr_len=sizeof(*sin6); | |
383 | ||
384 | if (flags & MSG_ERRQUEUE) | |
385 | return ipv6_recv_error(sk, msg, len); | |
386 | ||
387 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
388 | if (!skb) | |
389 | goto out; | |
390 | ||
391 | copied = skb->len; | |
392 | if (copied > len) { | |
393 | copied = len; | |
394 | msg->msg_flags |= MSG_TRUNC; | |
395 | } | |
396 | ||
397 | if (skb->ip_summed==CHECKSUM_UNNECESSARY) { | |
398 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
399 | } else if (msg->msg_flags&MSG_TRUNC) { | |
fb286bb2 | 400 | if (__skb_checksum_complete(skb)) |
1da177e4 LT |
401 | goto csum_copy_err; |
402 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
403 | } else { | |
404 | err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov); | |
405 | if (err == -EINVAL) | |
406 | goto csum_copy_err; | |
407 | } | |
408 | if (err) | |
409 | goto out_free; | |
410 | ||
411 | /* Copy the address. */ | |
412 | if (sin6) { | |
413 | sin6->sin6_family = AF_INET6; | |
414 | ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr); | |
415 | sin6->sin6_flowinfo = 0; | |
416 | sin6->sin6_scope_id = 0; | |
417 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
418 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
419 | } | |
420 | ||
421 | sock_recv_timestamp(msg, sk, skb); | |
422 | ||
423 | if (np->rxopt.all) | |
424 | datagram_recv_ctl(sk, msg, skb); | |
425 | ||
426 | err = copied; | |
427 | if (flags & MSG_TRUNC) | |
428 | err = skb->len; | |
429 | ||
430 | out_free: | |
431 | skb_free_datagram(sk, skb); | |
432 | out: | |
433 | return err; | |
434 | ||
435 | csum_copy_err: | |
3305b80c | 436 | skb_kill_datagram(sk, skb, flags); |
1da177e4 LT |
437 | |
438 | /* Error for blocking case is chosen to masquerade | |
439 | as some normal condition. | |
440 | */ | |
441 | err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; | |
442 | /* FIXME: increment a raw6 drops counter here */ | |
3305b80c | 443 | goto out; |
1da177e4 LT |
444 | } |
445 | ||
446 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl, | |
357b40a1 | 447 | struct raw6_sock *rp) |
1da177e4 LT |
448 | { |
449 | struct sk_buff *skb; | |
450 | int err = 0; | |
357b40a1 HX |
451 | int offset; |
452 | int len; | |
679a8738 | 453 | int total_len; |
1da177e4 | 454 | u32 tmp_csum; |
357b40a1 | 455 | u16 csum; |
1da177e4 LT |
456 | |
457 | if (!rp->checksum) | |
458 | goto send; | |
459 | ||
460 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
461 | goto out; | |
462 | ||
357b40a1 | 463 | offset = rp->offset; |
679a8738 HX |
464 | total_len = inet_sk(sk)->cork.length - (skb->nh.raw - skb->data); |
465 | if (offset >= total_len - 1) { | |
1da177e4 | 466 | err = -EINVAL; |
357b40a1 | 467 | ip6_flush_pending_frames(sk); |
1da177e4 LT |
468 | goto out; |
469 | } | |
470 | ||
471 | /* should be check HW csum miyazawa */ | |
472 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
473 | /* | |
474 | * Only one fragment on the socket. | |
475 | */ | |
476 | tmp_csum = skb->csum; | |
477 | } else { | |
357b40a1 | 478 | struct sk_buff *csum_skb = NULL; |
1da177e4 LT |
479 | tmp_csum = 0; |
480 | ||
481 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
482 | tmp_csum = csum_add(tmp_csum, skb->csum); | |
357b40a1 HX |
483 | |
484 | if (csum_skb) | |
485 | continue; | |
486 | ||
487 | len = skb->len - (skb->h.raw - skb->data); | |
488 | if (offset >= len) { | |
489 | offset -= len; | |
490 | continue; | |
491 | } | |
492 | ||
493 | csum_skb = skb; | |
1da177e4 | 494 | } |
357b40a1 HX |
495 | |
496 | skb = csum_skb; | |
1da177e4 LT |
497 | } |
498 | ||
357b40a1 HX |
499 | offset += skb->h.raw - skb->data; |
500 | if (skb_copy_bits(skb, offset, &csum, 2)) | |
501 | BUG(); | |
502 | ||
1da177e4 | 503 | /* in case cksum was not initialized */ |
357b40a1 HX |
504 | if (unlikely(csum)) |
505 | tmp_csum = csum_sub(tmp_csum, csum); | |
506 | ||
507 | tmp_csum = csum_ipv6_magic(&fl->fl6_src, | |
508 | &fl->fl6_dst, | |
679a8738 | 509 | total_len, fl->proto, tmp_csum); |
357b40a1 HX |
510 | |
511 | if (tmp_csum == 0) | |
512 | tmp_csum = -1; | |
1da177e4 | 513 | |
357b40a1 HX |
514 | csum = tmp_csum; |
515 | if (skb_store_bits(skb, offset, &csum, 2)) | |
516 | BUG(); | |
1da177e4 | 517 | |
1da177e4 LT |
518 | send: |
519 | err = ip6_push_pending_frames(sk); | |
520 | out: | |
521 | return err; | |
522 | } | |
523 | ||
524 | static int rawv6_send_hdrinc(struct sock *sk, void *from, int length, | |
525 | struct flowi *fl, struct rt6_info *rt, | |
526 | unsigned int flags) | |
527 | { | |
3320da89 | 528 | struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 LT |
529 | struct ipv6hdr *iph; |
530 | struct sk_buff *skb; | |
531 | unsigned int hh_len; | |
532 | int err; | |
533 | ||
534 | if (length > rt->u.dst.dev->mtu) { | |
535 | ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu); | |
536 | return -EMSGSIZE; | |
537 | } | |
538 | if (flags&MSG_PROBE) | |
539 | goto out; | |
540 | ||
541 | hh_len = LL_RESERVED_SPACE(rt->u.dst.dev); | |
542 | ||
543 | skb = sock_alloc_send_skb(sk, length+hh_len+15, | |
544 | flags&MSG_DONTWAIT, &err); | |
545 | if (skb == NULL) | |
546 | goto error; | |
547 | skb_reserve(skb, hh_len); | |
548 | ||
549 | skb->priority = sk->sk_priority; | |
550 | skb->dst = dst_clone(&rt->u.dst); | |
551 | ||
552 | skb->nh.ipv6h = iph = (struct ipv6hdr *)skb_put(skb, length); | |
553 | ||
554 | skb->ip_summed = CHECKSUM_NONE; | |
555 | ||
556 | skb->h.raw = skb->nh.raw; | |
557 | err = memcpy_fromiovecend((void *)iph, from, 0, length); | |
558 | if (err) | |
559 | goto error_fault; | |
560 | ||
561 | IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS); | |
562 | err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, rt->u.dst.dev, | |
563 | dst_output); | |
564 | if (err > 0) | |
3320da89 | 565 | err = np->recverr ? net_xmit_errno(err) : 0; |
1da177e4 LT |
566 | if (err) |
567 | goto error; | |
568 | out: | |
569 | return 0; | |
570 | ||
571 | error_fault: | |
572 | err = -EFAULT; | |
573 | kfree_skb(skb); | |
574 | error: | |
575 | IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS); | |
576 | return err; | |
577 | } | |
578 | ||
579 | static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) | |
580 | { | |
581 | struct iovec *iov; | |
582 | u8 __user *type = NULL; | |
583 | u8 __user *code = NULL; | |
584 | int probed = 0; | |
585 | int i; | |
586 | ||
587 | if (!msg->msg_iov) | |
588 | return; | |
589 | ||
590 | for (i = 0; i < msg->msg_iovlen; i++) { | |
591 | iov = &msg->msg_iov[i]; | |
592 | if (!iov) | |
593 | continue; | |
594 | ||
595 | switch (fl->proto) { | |
596 | case IPPROTO_ICMPV6: | |
597 | /* check if one-byte field is readable or not. */ | |
598 | if (iov->iov_base && iov->iov_len < 1) | |
599 | break; | |
600 | ||
601 | if (!type) { | |
602 | type = iov->iov_base; | |
603 | /* check if code field is readable or not. */ | |
604 | if (iov->iov_len > 1) | |
605 | code = type + 1; | |
606 | } else if (!code) | |
607 | code = iov->iov_base; | |
608 | ||
609 | if (type && code) { | |
610 | get_user(fl->fl_icmp_type, type); | |
6d1cfe3f | 611 | get_user(fl->fl_icmp_code, code); |
1da177e4 LT |
612 | probed = 1; |
613 | } | |
614 | break; | |
615 | default: | |
616 | probed = 1; | |
617 | break; | |
618 | } | |
619 | if (probed) | |
620 | break; | |
621 | } | |
622 | } | |
623 | ||
624 | static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, | |
625 | struct msghdr *msg, size_t len) | |
626 | { | |
627 | struct ipv6_txoptions opt_space; | |
628 | struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
629 | struct in6_addr *daddr, *final_p = NULL, final; | |
630 | struct inet_sock *inet = inet_sk(sk); | |
631 | struct ipv6_pinfo *np = inet6_sk(sk); | |
632 | struct raw6_sock *rp = raw6_sk(sk); | |
633 | struct ipv6_txoptions *opt = NULL; | |
634 | struct ip6_flowlabel *flowlabel = NULL; | |
635 | struct dst_entry *dst = NULL; | |
636 | struct flowi fl; | |
637 | int addr_len = msg->msg_namelen; | |
638 | int hlimit = -1; | |
41a1f8ea | 639 | int tclass = -1; |
1da177e4 LT |
640 | u16 proto; |
641 | int err; | |
642 | ||
643 | /* Rough check on arithmetic overflow, | |
644 | better check is made in ip6_build_xmit | |
645 | */ | |
646 | if (len < 0) | |
647 | return -EMSGSIZE; | |
648 | ||
649 | /* Mirror BSD error message compatibility */ | |
650 | if (msg->msg_flags & MSG_OOB) | |
651 | return -EOPNOTSUPP; | |
652 | ||
653 | /* | |
654 | * Get and verify the address. | |
655 | */ | |
656 | memset(&fl, 0, sizeof(fl)); | |
657 | ||
658 | if (sin6) { | |
659 | if (addr_len < SIN6_LEN_RFC2133) | |
660 | return -EINVAL; | |
661 | ||
662 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) | |
663 | return(-EAFNOSUPPORT); | |
664 | ||
665 | /* port is the proto value [0..255] carried in nexthdr */ | |
666 | proto = ntohs(sin6->sin6_port); | |
667 | ||
668 | if (!proto) | |
669 | proto = inet->num; | |
670 | else if (proto != inet->num) | |
671 | return(-EINVAL); | |
672 | ||
673 | if (proto > 255) | |
674 | return(-EINVAL); | |
675 | ||
676 | daddr = &sin6->sin6_addr; | |
677 | if (np->sndflow) { | |
678 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; | |
679 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
680 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
681 | if (flowlabel == NULL) | |
682 | return -EINVAL; | |
683 | daddr = &flowlabel->dst; | |
684 | } | |
685 | } | |
686 | ||
687 | /* | |
688 | * Otherwise it will be difficult to maintain | |
689 | * sk->sk_dst_cache. | |
690 | */ | |
691 | if (sk->sk_state == TCP_ESTABLISHED && | |
692 | ipv6_addr_equal(daddr, &np->daddr)) | |
693 | daddr = &np->daddr; | |
694 | ||
695 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
696 | sin6->sin6_scope_id && | |
697 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
698 | fl.oif = sin6->sin6_scope_id; | |
699 | } else { | |
700 | if (sk->sk_state != TCP_ESTABLISHED) | |
701 | return -EDESTADDRREQ; | |
702 | ||
703 | proto = inet->num; | |
704 | daddr = &np->daddr; | |
705 | fl.fl6_flowlabel = np->flow_label; | |
706 | } | |
707 | ||
708 | if (ipv6_addr_any(daddr)) { | |
709 | /* | |
710 | * unspecified destination address | |
711 | * treated as error... is this correct ? | |
712 | */ | |
713 | fl6_sock_release(flowlabel); | |
714 | return(-EINVAL); | |
715 | } | |
716 | ||
717 | if (fl.oif == 0) | |
718 | fl.oif = sk->sk_bound_dev_if; | |
719 | ||
720 | if (msg->msg_controllen) { | |
721 | opt = &opt_space; | |
722 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
723 | opt->tot_len = sizeof(struct ipv6_txoptions); | |
724 | ||
41a1f8ea | 725 | err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
726 | if (err < 0) { |
727 | fl6_sock_release(flowlabel); | |
728 | return err; | |
729 | } | |
730 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { | |
731 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
732 | if (flowlabel == NULL) | |
733 | return -EINVAL; | |
734 | } | |
735 | if (!(opt->opt_nflen|opt->opt_flen)) | |
736 | opt = NULL; | |
737 | } | |
738 | if (opt == NULL) | |
739 | opt = np->opt; | |
df9890c3 YH |
740 | if (flowlabel) |
741 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
742 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 LT |
743 | |
744 | fl.proto = proto; | |
745 | rawv6_probe_proto_opt(&fl, msg); | |
746 | ||
747 | ipv6_addr_copy(&fl.fl6_dst, daddr); | |
748 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) | |
749 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
750 | ||
751 | /* merge ip6_build_xmit from ip6_output */ | |
752 | if (opt && opt->srcrt) { | |
753 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
754 | ipv6_addr_copy(&final, &fl.fl6_dst); | |
755 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
756 | final_p = &final; | |
757 | } | |
758 | ||
759 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) | |
760 | fl.oif = np->mcast_oif; | |
761 | ||
762 | err = ip6_dst_lookup(sk, &dst, &fl); | |
763 | if (err) | |
764 | goto out; | |
765 | if (final_p) | |
766 | ipv6_addr_copy(&fl.fl6_dst, final_p); | |
767 | ||
e104411b | 768 | if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) |
1da177e4 | 769 | goto out; |
1da177e4 LT |
770 | |
771 | if (hlimit < 0) { | |
772 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) | |
773 | hlimit = np->mcast_hops; | |
774 | else | |
775 | hlimit = np->hop_limit; | |
776 | if (hlimit < 0) | |
777 | hlimit = dst_metric(dst, RTAX_HOPLIMIT); | |
778 | if (hlimit < 0) | |
779 | hlimit = ipv6_get_hoplimit(dst->dev); | |
780 | } | |
781 | ||
41a1f8ea YH |
782 | if (tclass < 0) { |
783 | tclass = np->cork.tclass; | |
784 | if (tclass < 0) | |
785 | tclass = 0; | |
786 | } | |
787 | ||
1da177e4 LT |
788 | if (msg->msg_flags&MSG_CONFIRM) |
789 | goto do_confirm; | |
790 | ||
791 | back_from_confirm: | |
792 | if (inet->hdrincl) { | |
793 | err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags); | |
794 | } else { | |
795 | lock_sock(sk); | |
41a1f8ea YH |
796 | err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, |
797 | len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst, | |
798 | msg->msg_flags); | |
1da177e4 LT |
799 | |
800 | if (err) | |
801 | ip6_flush_pending_frames(sk); | |
802 | else if (!(msg->msg_flags & MSG_MORE)) | |
357b40a1 | 803 | err = rawv6_push_pending_frames(sk, &fl, rp); |
1da177e4 LT |
804 | } |
805 | done: | |
6d3e85ec | 806 | dst_release(dst); |
1da177e4 LT |
807 | release_sock(sk); |
808 | out: | |
809 | fl6_sock_release(flowlabel); | |
810 | return err<0?err:len; | |
811 | do_confirm: | |
812 | dst_confirm(dst); | |
813 | if (!(msg->msg_flags & MSG_PROBE) || len) | |
814 | goto back_from_confirm; | |
815 | err = 0; | |
816 | goto done; | |
817 | } | |
818 | ||
819 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, | |
820 | char __user *optval, int optlen) | |
821 | { | |
822 | switch (optname) { | |
823 | case ICMPV6_FILTER: | |
824 | if (optlen > sizeof(struct icmp6_filter)) | |
825 | optlen = sizeof(struct icmp6_filter); | |
826 | if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) | |
827 | return -EFAULT; | |
828 | return 0; | |
829 | default: | |
830 | return -ENOPROTOOPT; | |
831 | }; | |
832 | ||
833 | return 0; | |
834 | } | |
835 | ||
836 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, | |
837 | char __user *optval, int __user *optlen) | |
838 | { | |
839 | int len; | |
840 | ||
841 | switch (optname) { | |
842 | case ICMPV6_FILTER: | |
843 | if (get_user(len, optlen)) | |
844 | return -EFAULT; | |
845 | if (len < 0) | |
846 | return -EINVAL; | |
847 | if (len > sizeof(struct icmp6_filter)) | |
848 | len = sizeof(struct icmp6_filter); | |
849 | if (put_user(len, optlen)) | |
850 | return -EFAULT; | |
851 | if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) | |
852 | return -EFAULT; | |
853 | return 0; | |
854 | default: | |
855 | return -ENOPROTOOPT; | |
856 | }; | |
857 | ||
858 | return 0; | |
859 | } | |
860 | ||
861 | ||
862 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, | |
863 | char __user *optval, int optlen) | |
864 | { | |
865 | struct raw6_sock *rp = raw6_sk(sk); | |
866 | int val; | |
867 | ||
868 | switch(level) { | |
869 | case SOL_RAW: | |
870 | break; | |
871 | ||
872 | case SOL_ICMPV6: | |
873 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
874 | return -EOPNOTSUPP; | |
875 | return rawv6_seticmpfilter(sk, level, optname, optval, | |
876 | optlen); | |
877 | case SOL_IPV6: | |
878 | if (optname == IPV6_CHECKSUM) | |
879 | break; | |
880 | default: | |
881 | return ipv6_setsockopt(sk, level, optname, optval, | |
882 | optlen); | |
883 | }; | |
884 | ||
885 | if (get_user(val, (int __user *)optval)) | |
886 | return -EFAULT; | |
887 | ||
888 | switch (optname) { | |
889 | case IPV6_CHECKSUM: | |
890 | /* You may get strange result with a positive odd offset; | |
891 | RFC2292bis agrees with me. */ | |
892 | if (val > 0 && (val&1)) | |
893 | return(-EINVAL); | |
894 | if (val < 0) { | |
895 | rp->checksum = 0; | |
896 | } else { | |
897 | rp->checksum = 1; | |
898 | rp->offset = val; | |
899 | } | |
900 | ||
901 | return 0; | |
902 | break; | |
903 | ||
904 | default: | |
905 | return(-ENOPROTOOPT); | |
906 | } | |
907 | } | |
908 | ||
909 | static int rawv6_getsockopt(struct sock *sk, int level, int optname, | |
910 | char __user *optval, int __user *optlen) | |
911 | { | |
912 | struct raw6_sock *rp = raw6_sk(sk); | |
913 | int val, len; | |
914 | ||
915 | switch(level) { | |
916 | case SOL_RAW: | |
917 | break; | |
918 | ||
919 | case SOL_ICMPV6: | |
920 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
921 | return -EOPNOTSUPP; | |
922 | return rawv6_geticmpfilter(sk, level, optname, optval, | |
923 | optlen); | |
924 | case SOL_IPV6: | |
925 | if (optname == IPV6_CHECKSUM) | |
926 | break; | |
927 | default: | |
928 | return ipv6_getsockopt(sk, level, optname, optval, | |
929 | optlen); | |
930 | }; | |
931 | ||
932 | if (get_user(len,optlen)) | |
933 | return -EFAULT; | |
934 | ||
935 | switch (optname) { | |
936 | case IPV6_CHECKSUM: | |
937 | if (rp->checksum == 0) | |
938 | val = -1; | |
939 | else | |
940 | val = rp->offset; | |
941 | break; | |
942 | ||
943 | default: | |
944 | return -ENOPROTOOPT; | |
945 | } | |
946 | ||
947 | len = min_t(unsigned int, sizeof(int), len); | |
948 | ||
949 | if (put_user(len, optlen)) | |
950 | return -EFAULT; | |
951 | if (copy_to_user(optval,&val,len)) | |
952 | return -EFAULT; | |
953 | return 0; | |
954 | } | |
955 | ||
956 | static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) | |
957 | { | |
958 | switch(cmd) { | |
959 | case SIOCOUTQ: | |
960 | { | |
961 | int amount = atomic_read(&sk->sk_wmem_alloc); | |
962 | return put_user(amount, (int __user *)arg); | |
963 | } | |
964 | case SIOCINQ: | |
965 | { | |
966 | struct sk_buff *skb; | |
967 | int amount = 0; | |
968 | ||
e0f9f858 | 969 | spin_lock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
970 | skb = skb_peek(&sk->sk_receive_queue); |
971 | if (skb != NULL) | |
972 | amount = skb->tail - skb->h.raw; | |
e0f9f858 | 973 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
974 | return put_user(amount, (int __user *)arg); |
975 | } | |
976 | ||
977 | default: | |
978 | return -ENOIOCTLCMD; | |
979 | } | |
980 | } | |
981 | ||
982 | static void rawv6_close(struct sock *sk, long timeout) | |
983 | { | |
984 | if (inet_sk(sk)->num == IPPROTO_RAW) | |
985 | ip6_ra_control(sk, -1, NULL); | |
986 | ||
987 | sk_common_release(sk); | |
988 | } | |
989 | ||
990 | static int rawv6_init_sk(struct sock *sk) | |
991 | { | |
992 | if (inet_sk(sk)->num == IPPROTO_ICMPV6) { | |
993 | struct raw6_sock *rp = raw6_sk(sk); | |
994 | rp->checksum = 1; | |
995 | rp->offset = 2; | |
996 | } | |
997 | return(0); | |
998 | } | |
999 | ||
1000 | struct proto rawv6_prot = { | |
1001 | .name = "RAWv6", | |
1002 | .owner = THIS_MODULE, | |
1003 | .close = rawv6_close, | |
1004 | .connect = ip6_datagram_connect, | |
1005 | .disconnect = udp_disconnect, | |
1006 | .ioctl = rawv6_ioctl, | |
1007 | .init = rawv6_init_sk, | |
1008 | .destroy = inet6_destroy_sock, | |
1009 | .setsockopt = rawv6_setsockopt, | |
1010 | .getsockopt = rawv6_getsockopt, | |
1011 | .sendmsg = rawv6_sendmsg, | |
1012 | .recvmsg = rawv6_recvmsg, | |
1013 | .bind = rawv6_bind, | |
1014 | .backlog_rcv = rawv6_rcv_skb, | |
1015 | .hash = raw_v6_hash, | |
1016 | .unhash = raw_v6_unhash, | |
1017 | .obj_size = sizeof(struct raw6_sock), | |
1018 | }; | |
1019 | ||
1020 | #ifdef CONFIG_PROC_FS | |
1021 | struct raw6_iter_state { | |
1022 | int bucket; | |
1023 | }; | |
1024 | ||
1025 | #define raw6_seq_private(seq) ((struct raw6_iter_state *)(seq)->private) | |
1026 | ||
1027 | static struct sock *raw6_get_first(struct seq_file *seq) | |
1028 | { | |
1029 | struct sock *sk; | |
1030 | struct hlist_node *node; | |
1031 | struct raw6_iter_state* state = raw6_seq_private(seq); | |
1032 | ||
1033 | for (state->bucket = 0; state->bucket < RAWV6_HTABLE_SIZE; ++state->bucket) | |
1034 | sk_for_each(sk, node, &raw_v6_htable[state->bucket]) | |
1035 | if (sk->sk_family == PF_INET6) | |
1036 | goto out; | |
1037 | sk = NULL; | |
1038 | out: | |
1039 | return sk; | |
1040 | } | |
1041 | ||
1042 | static struct sock *raw6_get_next(struct seq_file *seq, struct sock *sk) | |
1043 | { | |
1044 | struct raw6_iter_state* state = raw6_seq_private(seq); | |
1045 | ||
1046 | do { | |
1047 | sk = sk_next(sk); | |
1048 | try_again: | |
1049 | ; | |
1050 | } while (sk && sk->sk_family != PF_INET6); | |
1051 | ||
1052 | if (!sk && ++state->bucket < RAWV6_HTABLE_SIZE) { | |
1053 | sk = sk_head(&raw_v6_htable[state->bucket]); | |
1054 | goto try_again; | |
1055 | } | |
1056 | return sk; | |
1057 | } | |
1058 | ||
1059 | static struct sock *raw6_get_idx(struct seq_file *seq, loff_t pos) | |
1060 | { | |
1061 | struct sock *sk = raw6_get_first(seq); | |
1062 | if (sk) | |
1063 | while (pos && (sk = raw6_get_next(seq, sk)) != NULL) | |
1064 | --pos; | |
1065 | return pos ? NULL : sk; | |
1066 | } | |
1067 | ||
1068 | static void *raw6_seq_start(struct seq_file *seq, loff_t *pos) | |
1069 | { | |
1070 | read_lock(&raw_v6_lock); | |
1071 | return *pos ? raw6_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | |
1072 | } | |
1073 | ||
1074 | static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1075 | { | |
1076 | struct sock *sk; | |
1077 | ||
1078 | if (v == SEQ_START_TOKEN) | |
1079 | sk = raw6_get_first(seq); | |
1080 | else | |
1081 | sk = raw6_get_next(seq, v); | |
1082 | ++*pos; | |
1083 | return sk; | |
1084 | } | |
1085 | ||
1086 | static void raw6_seq_stop(struct seq_file *seq, void *v) | |
1087 | { | |
1088 | read_unlock(&raw_v6_lock); | |
1089 | } | |
1090 | ||
1091 | static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) | |
1092 | { | |
1093 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1094 | struct in6_addr *dest, *src; | |
1095 | __u16 destp, srcp; | |
1096 | ||
1097 | dest = &np->daddr; | |
1098 | src = &np->rcv_saddr; | |
1099 | destp = 0; | |
1100 | srcp = inet_sk(sp)->num; | |
1101 | seq_printf(seq, | |
1102 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
1103 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n", | |
1104 | i, | |
1105 | src->s6_addr32[0], src->s6_addr32[1], | |
1106 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1107 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1108 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1109 | sp->sk_state, | |
1110 | atomic_read(&sp->sk_wmem_alloc), | |
1111 | atomic_read(&sp->sk_rmem_alloc), | |
1112 | 0, 0L, 0, | |
1113 | sock_i_uid(sp), 0, | |
1114 | sock_i_ino(sp), | |
1115 | atomic_read(&sp->sk_refcnt), sp); | |
1116 | } | |
1117 | ||
1118 | static int raw6_seq_show(struct seq_file *seq, void *v) | |
1119 | { | |
1120 | if (v == SEQ_START_TOKEN) | |
1121 | seq_printf(seq, | |
1122 | " sl " | |
1123 | "local_address " | |
1124 | "remote_address " | |
1125 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
1126 | " uid timeout inode\n"); | |
1127 | else | |
1128 | raw6_sock_seq_show(seq, v, raw6_seq_private(seq)->bucket); | |
1129 | return 0; | |
1130 | } | |
1131 | ||
1132 | static struct seq_operations raw6_seq_ops = { | |
1133 | .start = raw6_seq_start, | |
1134 | .next = raw6_seq_next, | |
1135 | .stop = raw6_seq_stop, | |
1136 | .show = raw6_seq_show, | |
1137 | }; | |
1138 | ||
1139 | static int raw6_seq_open(struct inode *inode, struct file *file) | |
1140 | { | |
1141 | struct seq_file *seq; | |
1142 | int rc = -ENOMEM; | |
1143 | struct raw6_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL); | |
1144 | if (!s) | |
1145 | goto out; | |
1146 | rc = seq_open(file, &raw6_seq_ops); | |
1147 | if (rc) | |
1148 | goto out_kfree; | |
1149 | seq = file->private_data; | |
1150 | seq->private = s; | |
1151 | memset(s, 0, sizeof(*s)); | |
1152 | out: | |
1153 | return rc; | |
1154 | out_kfree: | |
1155 | kfree(s); | |
1156 | goto out; | |
1157 | } | |
1158 | ||
1159 | static struct file_operations raw6_seq_fops = { | |
1160 | .owner = THIS_MODULE, | |
1161 | .open = raw6_seq_open, | |
1162 | .read = seq_read, | |
1163 | .llseek = seq_lseek, | |
1164 | .release = seq_release_private, | |
1165 | }; | |
1166 | ||
1167 | int __init raw6_proc_init(void) | |
1168 | { | |
1169 | if (!proc_net_fops_create("raw6", S_IRUGO, &raw6_seq_fops)) | |
1170 | return -ENOMEM; | |
1171 | return 0; | |
1172 | } | |
1173 | ||
1174 | void raw6_proc_exit(void) | |
1175 | { | |
1176 | proc_net_remove("raw6"); | |
1177 | } | |
1178 | #endif /* CONFIG_PROC_FS */ |