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> | |
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 | ||
0bd1b59b | 169 | sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr, skb->dev->ifindex); |
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! */ | |
177 | if (clone) | |
178 | rawv6_rcv(sk, clone); | |
179 | } | |
0bd1b59b AM |
180 | sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr, |
181 | skb->dev->ifindex); | |
1da177e4 LT |
182 | } |
183 | out: | |
184 | read_unlock(&raw_v6_lock); | |
d13964f4 | 185 | return delivered; |
1da177e4 LT |
186 | } |
187 | ||
188 | /* This cleans up af_inet6 a bit. -DaveM */ | |
189 | static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
190 | { | |
191 | struct inet_sock *inet = inet_sk(sk); | |
192 | struct ipv6_pinfo *np = inet6_sk(sk); | |
193 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; | |
194 | __u32 v4addr = 0; | |
195 | int addr_type; | |
196 | int err; | |
197 | ||
198 | if (addr_len < SIN6_LEN_RFC2133) | |
199 | return -EINVAL; | |
200 | addr_type = ipv6_addr_type(&addr->sin6_addr); | |
201 | ||
202 | /* Raw sockets are IPv6 only */ | |
203 | if (addr_type == IPV6_ADDR_MAPPED) | |
204 | return(-EADDRNOTAVAIL); | |
205 | ||
206 | lock_sock(sk); | |
207 | ||
208 | err = -EINVAL; | |
209 | if (sk->sk_state != TCP_CLOSE) | |
210 | goto out; | |
211 | ||
212 | /* Check if the address belongs to the host. */ | |
213 | if (addr_type != IPV6_ADDR_ANY) { | |
214 | struct net_device *dev = NULL; | |
215 | ||
216 | if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
217 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
218 | addr->sin6_scope_id) { | |
219 | /* Override any existing binding, if another | |
220 | * one is supplied by user. | |
221 | */ | |
222 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
223 | } | |
224 | ||
225 | /* Binding to link-local address requires an interface */ | |
226 | if (!sk->sk_bound_dev_if) | |
227 | goto out; | |
228 | ||
229 | dev = dev_get_by_index(sk->sk_bound_dev_if); | |
230 | if (!dev) { | |
231 | err = -ENODEV; | |
232 | goto out; | |
233 | } | |
234 | } | |
235 | ||
236 | /* ipv4 addr of the socket is invalid. Only the | |
237 | * unspecified and mapped address have a v4 equivalent. | |
238 | */ | |
239 | v4addr = LOOPBACK4_IPV6; | |
240 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
241 | err = -EADDRNOTAVAIL; | |
242 | if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) { | |
243 | if (dev) | |
244 | dev_put(dev); | |
245 | goto out; | |
246 | } | |
247 | } | |
248 | if (dev) | |
249 | dev_put(dev); | |
250 | } | |
251 | ||
252 | inet->rcv_saddr = inet->saddr = v4addr; | |
253 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); | |
254 | if (!(addr_type & IPV6_ADDR_MULTICAST)) | |
255 | ipv6_addr_copy(&np->saddr, &addr->sin6_addr); | |
256 | err = 0; | |
257 | out: | |
258 | release_sock(sk); | |
259 | return err; | |
260 | } | |
261 | ||
262 | void rawv6_err(struct sock *sk, struct sk_buff *skb, | |
263 | struct inet6_skb_parm *opt, | |
264 | int type, int code, int offset, u32 info) | |
265 | { | |
266 | struct inet_sock *inet = inet_sk(sk); | |
267 | struct ipv6_pinfo *np = inet6_sk(sk); | |
268 | int err; | |
269 | int harderr; | |
270 | ||
271 | /* Report error on raw socket, if: | |
272 | 1. User requested recverr. | |
273 | 2. Socket is connected (otherwise the error indication | |
274 | is useless without recverr and error is hard. | |
275 | */ | |
276 | if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) | |
277 | return; | |
278 | ||
279 | harderr = icmpv6_err_convert(type, code, &err); | |
280 | if (type == ICMPV6_PKT_TOOBIG) | |
281 | harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); | |
282 | ||
283 | if (np->recverr) { | |
284 | u8 *payload = skb->data; | |
285 | if (!inet->hdrincl) | |
286 | payload += offset; | |
287 | ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); | |
288 | } | |
289 | ||
290 | if (np->recverr || harderr) { | |
291 | sk->sk_err = err; | |
292 | sk->sk_error_report(sk); | |
293 | } | |
294 | } | |
295 | ||
296 | static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb) | |
297 | { | |
298 | if ((raw6_sk(sk)->checksum || sk->sk_filter) && | |
299 | skb->ip_summed != CHECKSUM_UNNECESSARY) { | |
300 | if ((unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum))) { | |
301 | /* FIXME: increment a raw6 drops counter here */ | |
302 | kfree_skb(skb); | |
303 | return 0; | |
304 | } | |
305 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
306 | } | |
307 | ||
308 | /* Charge it to the socket. */ | |
309 | if (sock_queue_rcv_skb(sk,skb)<0) { | |
310 | /* FIXME: increment a raw6 drops counter here */ | |
311 | kfree_skb(skb); | |
312 | return 0; | |
313 | } | |
314 | ||
315 | return 0; | |
316 | } | |
317 | ||
318 | /* | |
319 | * This is next to useless... | |
320 | * if we demultiplex in network layer we don't need the extra call | |
321 | * just to queue the skb... | |
322 | * maybe we could have the network decide upon a hint if it | |
323 | * should call raw_rcv for demultiplexing | |
324 | */ | |
325 | int rawv6_rcv(struct sock *sk, struct sk_buff *skb) | |
326 | { | |
327 | struct inet_sock *inet = inet_sk(sk); | |
328 | struct raw6_sock *rp = raw6_sk(sk); | |
329 | ||
330 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { | |
331 | kfree_skb(skb); | |
332 | return NET_RX_DROP; | |
333 | } | |
334 | ||
335 | if (!rp->checksum) | |
336 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
337 | ||
338 | if (skb->ip_summed != CHECKSUM_UNNECESSARY) { | |
339 | if (skb->ip_summed == CHECKSUM_HW) { | |
793245ee PM |
340 | skb_postpull_rcsum(skb, skb->nh.raw, |
341 | skb->h.raw - skb->nh.raw); | |
1da177e4 LT |
342 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
343 | if (csum_ipv6_magic(&skb->nh.ipv6h->saddr, | |
344 | &skb->nh.ipv6h->daddr, | |
345 | skb->len, inet->num, skb->csum)) { | |
64ce2073 | 346 | LIMIT_NETDEBUG(KERN_DEBUG "raw v6 hw csum failure.\n"); |
1da177e4 LT |
347 | skb->ip_summed = CHECKSUM_NONE; |
348 | } | |
349 | } | |
350 | if (skb->ip_summed == CHECKSUM_NONE) | |
351 | skb->csum = ~csum_ipv6_magic(&skb->nh.ipv6h->saddr, | |
352 | &skb->nh.ipv6h->daddr, | |
353 | skb->len, inet->num, 0); | |
354 | } | |
355 | ||
356 | if (inet->hdrincl) { | |
357 | if (skb->ip_summed != CHECKSUM_UNNECESSARY && | |
358 | (unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum))) { | |
359 | /* FIXME: increment a raw6 drops counter here */ | |
360 | kfree_skb(skb); | |
361 | return 0; | |
362 | } | |
363 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
364 | } | |
365 | ||
366 | rawv6_rcv_skb(sk, skb); | |
367 | return 0; | |
368 | } | |
369 | ||
370 | ||
371 | /* | |
372 | * This should be easy, if there is something there | |
373 | * we return it, otherwise we block. | |
374 | */ | |
375 | ||
376 | static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk, | |
377 | struct msghdr *msg, size_t len, | |
378 | int noblock, int flags, int *addr_len) | |
379 | { | |
380 | struct ipv6_pinfo *np = inet6_sk(sk); | |
381 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name; | |
382 | struct sk_buff *skb; | |
383 | size_t copied; | |
384 | int err; | |
385 | ||
386 | if (flags & MSG_OOB) | |
387 | return -EOPNOTSUPP; | |
388 | ||
389 | if (addr_len) | |
390 | *addr_len=sizeof(*sin6); | |
391 | ||
392 | if (flags & MSG_ERRQUEUE) | |
393 | return ipv6_recv_error(sk, msg, len); | |
394 | ||
395 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
396 | if (!skb) | |
397 | goto out; | |
398 | ||
399 | copied = skb->len; | |
400 | if (copied > len) { | |
401 | copied = len; | |
402 | msg->msg_flags |= MSG_TRUNC; | |
403 | } | |
404 | ||
405 | if (skb->ip_summed==CHECKSUM_UNNECESSARY) { | |
406 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
407 | } else if (msg->msg_flags&MSG_TRUNC) { | |
408 | if ((unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum))) | |
409 | goto csum_copy_err; | |
410 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
411 | } else { | |
412 | err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov); | |
413 | if (err == -EINVAL) | |
414 | goto csum_copy_err; | |
415 | } | |
416 | if (err) | |
417 | goto out_free; | |
418 | ||
419 | /* Copy the address. */ | |
420 | if (sin6) { | |
421 | sin6->sin6_family = AF_INET6; | |
422 | ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr); | |
423 | sin6->sin6_flowinfo = 0; | |
424 | sin6->sin6_scope_id = 0; | |
425 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
426 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
427 | } | |
428 | ||
429 | sock_recv_timestamp(msg, sk, skb); | |
430 | ||
431 | if (np->rxopt.all) | |
432 | datagram_recv_ctl(sk, msg, skb); | |
433 | ||
434 | err = copied; | |
435 | if (flags & MSG_TRUNC) | |
436 | err = skb->len; | |
437 | ||
438 | out_free: | |
439 | skb_free_datagram(sk, skb); | |
440 | out: | |
441 | return err; | |
442 | ||
443 | csum_copy_err: | |
444 | /* Clear queue. */ | |
445 | if (flags&MSG_PEEK) { | |
446 | int clear = 0; | |
e0f9f858 | 447 | spin_lock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
448 | if (skb == skb_peek(&sk->sk_receive_queue)) { |
449 | __skb_unlink(skb, &sk->sk_receive_queue); | |
450 | clear = 1; | |
451 | } | |
e0f9f858 | 452 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
453 | if (clear) |
454 | kfree_skb(skb); | |
455 | } | |
456 | ||
457 | /* Error for blocking case is chosen to masquerade | |
458 | as some normal condition. | |
459 | */ | |
460 | err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; | |
461 | /* FIXME: increment a raw6 drops counter here */ | |
462 | goto out_free; | |
463 | } | |
464 | ||
465 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl, | |
357b40a1 | 466 | struct raw6_sock *rp) |
1da177e4 LT |
467 | { |
468 | struct sk_buff *skb; | |
469 | int err = 0; | |
357b40a1 HX |
470 | int offset; |
471 | int len; | |
679a8738 | 472 | int total_len; |
1da177e4 | 473 | u32 tmp_csum; |
357b40a1 | 474 | u16 csum; |
1da177e4 LT |
475 | |
476 | if (!rp->checksum) | |
477 | goto send; | |
478 | ||
479 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
480 | goto out; | |
481 | ||
357b40a1 | 482 | offset = rp->offset; |
679a8738 HX |
483 | total_len = inet_sk(sk)->cork.length - (skb->nh.raw - skb->data); |
484 | if (offset >= total_len - 1) { | |
1da177e4 | 485 | err = -EINVAL; |
357b40a1 | 486 | ip6_flush_pending_frames(sk); |
1da177e4 LT |
487 | goto out; |
488 | } | |
489 | ||
490 | /* should be check HW csum miyazawa */ | |
491 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
492 | /* | |
493 | * Only one fragment on the socket. | |
494 | */ | |
495 | tmp_csum = skb->csum; | |
496 | } else { | |
357b40a1 | 497 | struct sk_buff *csum_skb = NULL; |
1da177e4 LT |
498 | tmp_csum = 0; |
499 | ||
500 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
501 | tmp_csum = csum_add(tmp_csum, skb->csum); | |
357b40a1 HX |
502 | |
503 | if (csum_skb) | |
504 | continue; | |
505 | ||
506 | len = skb->len - (skb->h.raw - skb->data); | |
507 | if (offset >= len) { | |
508 | offset -= len; | |
509 | continue; | |
510 | } | |
511 | ||
512 | csum_skb = skb; | |
1da177e4 | 513 | } |
357b40a1 HX |
514 | |
515 | skb = csum_skb; | |
1da177e4 LT |
516 | } |
517 | ||
357b40a1 HX |
518 | offset += skb->h.raw - skb->data; |
519 | if (skb_copy_bits(skb, offset, &csum, 2)) | |
520 | BUG(); | |
521 | ||
1da177e4 | 522 | /* in case cksum was not initialized */ |
357b40a1 HX |
523 | if (unlikely(csum)) |
524 | tmp_csum = csum_sub(tmp_csum, csum); | |
525 | ||
526 | tmp_csum = csum_ipv6_magic(&fl->fl6_src, | |
527 | &fl->fl6_dst, | |
679a8738 | 528 | total_len, fl->proto, tmp_csum); |
357b40a1 HX |
529 | |
530 | if (tmp_csum == 0) | |
531 | tmp_csum = -1; | |
1da177e4 | 532 | |
357b40a1 HX |
533 | csum = tmp_csum; |
534 | if (skb_store_bits(skb, offset, &csum, 2)) | |
535 | BUG(); | |
1da177e4 | 536 | |
1da177e4 LT |
537 | send: |
538 | err = ip6_push_pending_frames(sk); | |
539 | out: | |
540 | return err; | |
541 | } | |
542 | ||
543 | static int rawv6_send_hdrinc(struct sock *sk, void *from, int length, | |
544 | struct flowi *fl, struct rt6_info *rt, | |
545 | unsigned int flags) | |
546 | { | |
3320da89 | 547 | struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 LT |
548 | struct ipv6hdr *iph; |
549 | struct sk_buff *skb; | |
550 | unsigned int hh_len; | |
551 | int err; | |
552 | ||
553 | if (length > rt->u.dst.dev->mtu) { | |
554 | ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu); | |
555 | return -EMSGSIZE; | |
556 | } | |
557 | if (flags&MSG_PROBE) | |
558 | goto out; | |
559 | ||
560 | hh_len = LL_RESERVED_SPACE(rt->u.dst.dev); | |
561 | ||
562 | skb = sock_alloc_send_skb(sk, length+hh_len+15, | |
563 | flags&MSG_DONTWAIT, &err); | |
564 | if (skb == NULL) | |
565 | goto error; | |
566 | skb_reserve(skb, hh_len); | |
567 | ||
568 | skb->priority = sk->sk_priority; | |
569 | skb->dst = dst_clone(&rt->u.dst); | |
570 | ||
571 | skb->nh.ipv6h = iph = (struct ipv6hdr *)skb_put(skb, length); | |
572 | ||
573 | skb->ip_summed = CHECKSUM_NONE; | |
574 | ||
575 | skb->h.raw = skb->nh.raw; | |
576 | err = memcpy_fromiovecend((void *)iph, from, 0, length); | |
577 | if (err) | |
578 | goto error_fault; | |
579 | ||
580 | IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS); | |
581 | err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, rt->u.dst.dev, | |
582 | dst_output); | |
583 | if (err > 0) | |
3320da89 | 584 | err = np->recverr ? net_xmit_errno(err) : 0; |
1da177e4 LT |
585 | if (err) |
586 | goto error; | |
587 | out: | |
588 | return 0; | |
589 | ||
590 | error_fault: | |
591 | err = -EFAULT; | |
592 | kfree_skb(skb); | |
593 | error: | |
594 | IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS); | |
595 | return err; | |
596 | } | |
597 | ||
598 | static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) | |
599 | { | |
600 | struct iovec *iov; | |
601 | u8 __user *type = NULL; | |
602 | u8 __user *code = NULL; | |
603 | int probed = 0; | |
604 | int i; | |
605 | ||
606 | if (!msg->msg_iov) | |
607 | return; | |
608 | ||
609 | for (i = 0; i < msg->msg_iovlen; i++) { | |
610 | iov = &msg->msg_iov[i]; | |
611 | if (!iov) | |
612 | continue; | |
613 | ||
614 | switch (fl->proto) { | |
615 | case IPPROTO_ICMPV6: | |
616 | /* check if one-byte field is readable or not. */ | |
617 | if (iov->iov_base && iov->iov_len < 1) | |
618 | break; | |
619 | ||
620 | if (!type) { | |
621 | type = iov->iov_base; | |
622 | /* check if code field is readable or not. */ | |
623 | if (iov->iov_len > 1) | |
624 | code = type + 1; | |
625 | } else if (!code) | |
626 | code = iov->iov_base; | |
627 | ||
628 | if (type && code) { | |
629 | get_user(fl->fl_icmp_type, type); | |
630 | __get_user(fl->fl_icmp_code, code); | |
631 | probed = 1; | |
632 | } | |
633 | break; | |
634 | default: | |
635 | probed = 1; | |
636 | break; | |
637 | } | |
638 | if (probed) | |
639 | break; | |
640 | } | |
641 | } | |
642 | ||
643 | static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, | |
644 | struct msghdr *msg, size_t len) | |
645 | { | |
646 | struct ipv6_txoptions opt_space; | |
647 | struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
648 | struct in6_addr *daddr, *final_p = NULL, final; | |
649 | struct inet_sock *inet = inet_sk(sk); | |
650 | struct ipv6_pinfo *np = inet6_sk(sk); | |
651 | struct raw6_sock *rp = raw6_sk(sk); | |
652 | struct ipv6_txoptions *opt = NULL; | |
653 | struct ip6_flowlabel *flowlabel = NULL; | |
654 | struct dst_entry *dst = NULL; | |
655 | struct flowi fl; | |
656 | int addr_len = msg->msg_namelen; | |
657 | int hlimit = -1; | |
658 | u16 proto; | |
659 | int err; | |
660 | ||
661 | /* Rough check on arithmetic overflow, | |
662 | better check is made in ip6_build_xmit | |
663 | */ | |
664 | if (len < 0) | |
665 | return -EMSGSIZE; | |
666 | ||
667 | /* Mirror BSD error message compatibility */ | |
668 | if (msg->msg_flags & MSG_OOB) | |
669 | return -EOPNOTSUPP; | |
670 | ||
671 | /* | |
672 | * Get and verify the address. | |
673 | */ | |
674 | memset(&fl, 0, sizeof(fl)); | |
675 | ||
676 | if (sin6) { | |
677 | if (addr_len < SIN6_LEN_RFC2133) | |
678 | return -EINVAL; | |
679 | ||
680 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) | |
681 | return(-EAFNOSUPPORT); | |
682 | ||
683 | /* port is the proto value [0..255] carried in nexthdr */ | |
684 | proto = ntohs(sin6->sin6_port); | |
685 | ||
686 | if (!proto) | |
687 | proto = inet->num; | |
688 | else if (proto != inet->num) | |
689 | return(-EINVAL); | |
690 | ||
691 | if (proto > 255) | |
692 | return(-EINVAL); | |
693 | ||
694 | daddr = &sin6->sin6_addr; | |
695 | if (np->sndflow) { | |
696 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; | |
697 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
698 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
699 | if (flowlabel == NULL) | |
700 | return -EINVAL; | |
701 | daddr = &flowlabel->dst; | |
702 | } | |
703 | } | |
704 | ||
705 | /* | |
706 | * Otherwise it will be difficult to maintain | |
707 | * sk->sk_dst_cache. | |
708 | */ | |
709 | if (sk->sk_state == TCP_ESTABLISHED && | |
710 | ipv6_addr_equal(daddr, &np->daddr)) | |
711 | daddr = &np->daddr; | |
712 | ||
713 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
714 | sin6->sin6_scope_id && | |
715 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
716 | fl.oif = sin6->sin6_scope_id; | |
717 | } else { | |
718 | if (sk->sk_state != TCP_ESTABLISHED) | |
719 | return -EDESTADDRREQ; | |
720 | ||
721 | proto = inet->num; | |
722 | daddr = &np->daddr; | |
723 | fl.fl6_flowlabel = np->flow_label; | |
724 | } | |
725 | ||
726 | if (ipv6_addr_any(daddr)) { | |
727 | /* | |
728 | * unspecified destination address | |
729 | * treated as error... is this correct ? | |
730 | */ | |
731 | fl6_sock_release(flowlabel); | |
732 | return(-EINVAL); | |
733 | } | |
734 | ||
735 | if (fl.oif == 0) | |
736 | fl.oif = sk->sk_bound_dev_if; | |
737 | ||
738 | if (msg->msg_controllen) { | |
739 | opt = &opt_space; | |
740 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
741 | opt->tot_len = sizeof(struct ipv6_txoptions); | |
742 | ||
743 | err = datagram_send_ctl(msg, &fl, opt, &hlimit); | |
744 | if (err < 0) { | |
745 | fl6_sock_release(flowlabel); | |
746 | return err; | |
747 | } | |
748 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { | |
749 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
750 | if (flowlabel == NULL) | |
751 | return -EINVAL; | |
752 | } | |
753 | if (!(opt->opt_nflen|opt->opt_flen)) | |
754 | opt = NULL; | |
755 | } | |
756 | if (opt == NULL) | |
757 | opt = np->opt; | |
758 | if (flowlabel) | |
759 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
760 | ||
761 | fl.proto = proto; | |
762 | rawv6_probe_proto_opt(&fl, msg); | |
763 | ||
764 | ipv6_addr_copy(&fl.fl6_dst, daddr); | |
765 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) | |
766 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
767 | ||
768 | /* merge ip6_build_xmit from ip6_output */ | |
769 | if (opt && opt->srcrt) { | |
770 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
771 | ipv6_addr_copy(&final, &fl.fl6_dst); | |
772 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
773 | final_p = &final; | |
774 | } | |
775 | ||
776 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) | |
777 | fl.oif = np->mcast_oif; | |
778 | ||
779 | err = ip6_dst_lookup(sk, &dst, &fl); | |
780 | if (err) | |
781 | goto out; | |
782 | if (final_p) | |
783 | ipv6_addr_copy(&fl.fl6_dst, final_p); | |
784 | ||
785 | if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) { | |
786 | dst_release(dst); | |
787 | goto out; | |
788 | } | |
789 | ||
790 | if (hlimit < 0) { | |
791 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) | |
792 | hlimit = np->mcast_hops; | |
793 | else | |
794 | hlimit = np->hop_limit; | |
795 | if (hlimit < 0) | |
796 | hlimit = dst_metric(dst, RTAX_HOPLIMIT); | |
797 | if (hlimit < 0) | |
798 | hlimit = ipv6_get_hoplimit(dst->dev); | |
799 | } | |
800 | ||
801 | if (msg->msg_flags&MSG_CONFIRM) | |
802 | goto do_confirm; | |
803 | ||
804 | back_from_confirm: | |
805 | if (inet->hdrincl) { | |
806 | err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags); | |
807 | } else { | |
808 | lock_sock(sk); | |
809 | err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, len, 0, | |
810 | hlimit, opt, &fl, (struct rt6_info*)dst, msg->msg_flags); | |
811 | ||
812 | if (err) | |
813 | ip6_flush_pending_frames(sk); | |
814 | else if (!(msg->msg_flags & MSG_MORE)) | |
357b40a1 | 815 | err = rawv6_push_pending_frames(sk, &fl, rp); |
1da177e4 LT |
816 | } |
817 | done: | |
818 | ip6_dst_store(sk, dst, | |
819 | ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? | |
820 | &np->daddr : NULL); | |
1da177e4 LT |
821 | |
822 | release_sock(sk); | |
823 | out: | |
824 | fl6_sock_release(flowlabel); | |
825 | return err<0?err:len; | |
826 | do_confirm: | |
827 | dst_confirm(dst); | |
828 | if (!(msg->msg_flags & MSG_PROBE) || len) | |
829 | goto back_from_confirm; | |
830 | err = 0; | |
831 | goto done; | |
832 | } | |
833 | ||
834 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, | |
835 | char __user *optval, int optlen) | |
836 | { | |
837 | switch (optname) { | |
838 | case ICMPV6_FILTER: | |
839 | if (optlen > sizeof(struct icmp6_filter)) | |
840 | optlen = sizeof(struct icmp6_filter); | |
841 | if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) | |
842 | return -EFAULT; | |
843 | return 0; | |
844 | default: | |
845 | return -ENOPROTOOPT; | |
846 | }; | |
847 | ||
848 | return 0; | |
849 | } | |
850 | ||
851 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, | |
852 | char __user *optval, int __user *optlen) | |
853 | { | |
854 | int len; | |
855 | ||
856 | switch (optname) { | |
857 | case ICMPV6_FILTER: | |
858 | if (get_user(len, optlen)) | |
859 | return -EFAULT; | |
860 | if (len < 0) | |
861 | return -EINVAL; | |
862 | if (len > sizeof(struct icmp6_filter)) | |
863 | len = sizeof(struct icmp6_filter); | |
864 | if (put_user(len, optlen)) | |
865 | return -EFAULT; | |
866 | if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) | |
867 | return -EFAULT; | |
868 | return 0; | |
869 | default: | |
870 | return -ENOPROTOOPT; | |
871 | }; | |
872 | ||
873 | return 0; | |
874 | } | |
875 | ||
876 | ||
877 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, | |
878 | char __user *optval, int optlen) | |
879 | { | |
880 | struct raw6_sock *rp = raw6_sk(sk); | |
881 | int val; | |
882 | ||
883 | switch(level) { | |
884 | case SOL_RAW: | |
885 | break; | |
886 | ||
887 | case SOL_ICMPV6: | |
888 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
889 | return -EOPNOTSUPP; | |
890 | return rawv6_seticmpfilter(sk, level, optname, optval, | |
891 | optlen); | |
892 | case SOL_IPV6: | |
893 | if (optname == IPV6_CHECKSUM) | |
894 | break; | |
895 | default: | |
896 | return ipv6_setsockopt(sk, level, optname, optval, | |
897 | optlen); | |
898 | }; | |
899 | ||
900 | if (get_user(val, (int __user *)optval)) | |
901 | return -EFAULT; | |
902 | ||
903 | switch (optname) { | |
904 | case IPV6_CHECKSUM: | |
905 | /* You may get strange result with a positive odd offset; | |
906 | RFC2292bis agrees with me. */ | |
907 | if (val > 0 && (val&1)) | |
908 | return(-EINVAL); | |
909 | if (val < 0) { | |
910 | rp->checksum = 0; | |
911 | } else { | |
912 | rp->checksum = 1; | |
913 | rp->offset = val; | |
914 | } | |
915 | ||
916 | return 0; | |
917 | break; | |
918 | ||
919 | default: | |
920 | return(-ENOPROTOOPT); | |
921 | } | |
922 | } | |
923 | ||
924 | static int rawv6_getsockopt(struct sock *sk, int level, int optname, | |
925 | char __user *optval, int __user *optlen) | |
926 | { | |
927 | struct raw6_sock *rp = raw6_sk(sk); | |
928 | int val, len; | |
929 | ||
930 | switch(level) { | |
931 | case SOL_RAW: | |
932 | break; | |
933 | ||
934 | case SOL_ICMPV6: | |
935 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
936 | return -EOPNOTSUPP; | |
937 | return rawv6_geticmpfilter(sk, level, optname, optval, | |
938 | optlen); | |
939 | case SOL_IPV6: | |
940 | if (optname == IPV6_CHECKSUM) | |
941 | break; | |
942 | default: | |
943 | return ipv6_getsockopt(sk, level, optname, optval, | |
944 | optlen); | |
945 | }; | |
946 | ||
947 | if (get_user(len,optlen)) | |
948 | return -EFAULT; | |
949 | ||
950 | switch (optname) { | |
951 | case IPV6_CHECKSUM: | |
952 | if (rp->checksum == 0) | |
953 | val = -1; | |
954 | else | |
955 | val = rp->offset; | |
956 | break; | |
957 | ||
958 | default: | |
959 | return -ENOPROTOOPT; | |
960 | } | |
961 | ||
962 | len = min_t(unsigned int, sizeof(int), len); | |
963 | ||
964 | if (put_user(len, optlen)) | |
965 | return -EFAULT; | |
966 | if (copy_to_user(optval,&val,len)) | |
967 | return -EFAULT; | |
968 | return 0; | |
969 | } | |
970 | ||
971 | static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) | |
972 | { | |
973 | switch(cmd) { | |
974 | case SIOCOUTQ: | |
975 | { | |
976 | int amount = atomic_read(&sk->sk_wmem_alloc); | |
977 | return put_user(amount, (int __user *)arg); | |
978 | } | |
979 | case SIOCINQ: | |
980 | { | |
981 | struct sk_buff *skb; | |
982 | int amount = 0; | |
983 | ||
e0f9f858 | 984 | spin_lock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
985 | skb = skb_peek(&sk->sk_receive_queue); |
986 | if (skb != NULL) | |
987 | amount = skb->tail - skb->h.raw; | |
e0f9f858 | 988 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
989 | return put_user(amount, (int __user *)arg); |
990 | } | |
991 | ||
992 | default: | |
993 | return -ENOIOCTLCMD; | |
994 | } | |
995 | } | |
996 | ||
997 | static void rawv6_close(struct sock *sk, long timeout) | |
998 | { | |
999 | if (inet_sk(sk)->num == IPPROTO_RAW) | |
1000 | ip6_ra_control(sk, -1, NULL); | |
1001 | ||
1002 | sk_common_release(sk); | |
1003 | } | |
1004 | ||
1005 | static int rawv6_init_sk(struct sock *sk) | |
1006 | { | |
1007 | if (inet_sk(sk)->num == IPPROTO_ICMPV6) { | |
1008 | struct raw6_sock *rp = raw6_sk(sk); | |
1009 | rp->checksum = 1; | |
1010 | rp->offset = 2; | |
1011 | } | |
1012 | return(0); | |
1013 | } | |
1014 | ||
1015 | struct proto rawv6_prot = { | |
1016 | .name = "RAWv6", | |
1017 | .owner = THIS_MODULE, | |
1018 | .close = rawv6_close, | |
1019 | .connect = ip6_datagram_connect, | |
1020 | .disconnect = udp_disconnect, | |
1021 | .ioctl = rawv6_ioctl, | |
1022 | .init = rawv6_init_sk, | |
1023 | .destroy = inet6_destroy_sock, | |
1024 | .setsockopt = rawv6_setsockopt, | |
1025 | .getsockopt = rawv6_getsockopt, | |
1026 | .sendmsg = rawv6_sendmsg, | |
1027 | .recvmsg = rawv6_recvmsg, | |
1028 | .bind = rawv6_bind, | |
1029 | .backlog_rcv = rawv6_rcv_skb, | |
1030 | .hash = raw_v6_hash, | |
1031 | .unhash = raw_v6_unhash, | |
1032 | .obj_size = sizeof(struct raw6_sock), | |
1033 | }; | |
1034 | ||
1035 | #ifdef CONFIG_PROC_FS | |
1036 | struct raw6_iter_state { | |
1037 | int bucket; | |
1038 | }; | |
1039 | ||
1040 | #define raw6_seq_private(seq) ((struct raw6_iter_state *)(seq)->private) | |
1041 | ||
1042 | static struct sock *raw6_get_first(struct seq_file *seq) | |
1043 | { | |
1044 | struct sock *sk; | |
1045 | struct hlist_node *node; | |
1046 | struct raw6_iter_state* state = raw6_seq_private(seq); | |
1047 | ||
1048 | for (state->bucket = 0; state->bucket < RAWV6_HTABLE_SIZE; ++state->bucket) | |
1049 | sk_for_each(sk, node, &raw_v6_htable[state->bucket]) | |
1050 | if (sk->sk_family == PF_INET6) | |
1051 | goto out; | |
1052 | sk = NULL; | |
1053 | out: | |
1054 | return sk; | |
1055 | } | |
1056 | ||
1057 | static struct sock *raw6_get_next(struct seq_file *seq, struct sock *sk) | |
1058 | { | |
1059 | struct raw6_iter_state* state = raw6_seq_private(seq); | |
1060 | ||
1061 | do { | |
1062 | sk = sk_next(sk); | |
1063 | try_again: | |
1064 | ; | |
1065 | } while (sk && sk->sk_family != PF_INET6); | |
1066 | ||
1067 | if (!sk && ++state->bucket < RAWV6_HTABLE_SIZE) { | |
1068 | sk = sk_head(&raw_v6_htable[state->bucket]); | |
1069 | goto try_again; | |
1070 | } | |
1071 | return sk; | |
1072 | } | |
1073 | ||
1074 | static struct sock *raw6_get_idx(struct seq_file *seq, loff_t pos) | |
1075 | { | |
1076 | struct sock *sk = raw6_get_first(seq); | |
1077 | if (sk) | |
1078 | while (pos && (sk = raw6_get_next(seq, sk)) != NULL) | |
1079 | --pos; | |
1080 | return pos ? NULL : sk; | |
1081 | } | |
1082 | ||
1083 | static void *raw6_seq_start(struct seq_file *seq, loff_t *pos) | |
1084 | { | |
1085 | read_lock(&raw_v6_lock); | |
1086 | return *pos ? raw6_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | |
1087 | } | |
1088 | ||
1089 | static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1090 | { | |
1091 | struct sock *sk; | |
1092 | ||
1093 | if (v == SEQ_START_TOKEN) | |
1094 | sk = raw6_get_first(seq); | |
1095 | else | |
1096 | sk = raw6_get_next(seq, v); | |
1097 | ++*pos; | |
1098 | return sk; | |
1099 | } | |
1100 | ||
1101 | static void raw6_seq_stop(struct seq_file *seq, void *v) | |
1102 | { | |
1103 | read_unlock(&raw_v6_lock); | |
1104 | } | |
1105 | ||
1106 | static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) | |
1107 | { | |
1108 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1109 | struct in6_addr *dest, *src; | |
1110 | __u16 destp, srcp; | |
1111 | ||
1112 | dest = &np->daddr; | |
1113 | src = &np->rcv_saddr; | |
1114 | destp = 0; | |
1115 | srcp = inet_sk(sp)->num; | |
1116 | seq_printf(seq, | |
1117 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
1118 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n", | |
1119 | i, | |
1120 | src->s6_addr32[0], src->s6_addr32[1], | |
1121 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1122 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1123 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1124 | sp->sk_state, | |
1125 | atomic_read(&sp->sk_wmem_alloc), | |
1126 | atomic_read(&sp->sk_rmem_alloc), | |
1127 | 0, 0L, 0, | |
1128 | sock_i_uid(sp), 0, | |
1129 | sock_i_ino(sp), | |
1130 | atomic_read(&sp->sk_refcnt), sp); | |
1131 | } | |
1132 | ||
1133 | static int raw6_seq_show(struct seq_file *seq, void *v) | |
1134 | { | |
1135 | if (v == SEQ_START_TOKEN) | |
1136 | seq_printf(seq, | |
1137 | " sl " | |
1138 | "local_address " | |
1139 | "remote_address " | |
1140 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
1141 | " uid timeout inode\n"); | |
1142 | else | |
1143 | raw6_sock_seq_show(seq, v, raw6_seq_private(seq)->bucket); | |
1144 | return 0; | |
1145 | } | |
1146 | ||
1147 | static struct seq_operations raw6_seq_ops = { | |
1148 | .start = raw6_seq_start, | |
1149 | .next = raw6_seq_next, | |
1150 | .stop = raw6_seq_stop, | |
1151 | .show = raw6_seq_show, | |
1152 | }; | |
1153 | ||
1154 | static int raw6_seq_open(struct inode *inode, struct file *file) | |
1155 | { | |
1156 | struct seq_file *seq; | |
1157 | int rc = -ENOMEM; | |
1158 | struct raw6_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL); | |
1159 | if (!s) | |
1160 | goto out; | |
1161 | rc = seq_open(file, &raw6_seq_ops); | |
1162 | if (rc) | |
1163 | goto out_kfree; | |
1164 | seq = file->private_data; | |
1165 | seq->private = s; | |
1166 | memset(s, 0, sizeof(*s)); | |
1167 | out: | |
1168 | return rc; | |
1169 | out_kfree: | |
1170 | kfree(s); | |
1171 | goto out; | |
1172 | } | |
1173 | ||
1174 | static struct file_operations raw6_seq_fops = { | |
1175 | .owner = THIS_MODULE, | |
1176 | .open = raw6_seq_open, | |
1177 | .read = seq_read, | |
1178 | .llseek = seq_lseek, | |
1179 | .release = seq_release_private, | |
1180 | }; | |
1181 | ||
1182 | int __init raw6_proc_init(void) | |
1183 | { | |
1184 | if (!proc_net_fops_create("raw6", S_IRUGO, &raw6_seq_fops)) | |
1185 | return -ENOMEM; | |
1186 | return 0; | |
1187 | } | |
1188 | ||
1189 | void raw6_proc_exit(void) | |
1190 | { | |
1191 | proc_net_remove("raw6"); | |
1192 | } | |
1193 | #endif /* CONFIG_PROC_FS */ |