blob: c2e629d6aea40e5519c3b865d62e1a092e6c9b60 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Herbert Xu3305b802005-12-13 23:16:37 -080035#include <linux/skbuff.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#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>
Arnaldo Carvalho de Meloc752f072005-08-09 20:08:28 -070052#include <net/tcp_states.h>
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -070053#ifdef CONFIG_IPV6_MIP6
54#include <net/mip6.h>
55#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
57#include <net/rawv6.h>
58#include <net/xfrm.h>
59
60#include <linux/proc_fs.h>
61#include <linux/seq_file.h>
62
63struct hlist_head raw_v6_htable[RAWV6_HTABLE_SIZE];
64DEFINE_RWLOCK(raw_v6_lock);
65
66static void raw_v6_hash(struct sock *sk)
67{
68 struct hlist_head *list = &raw_v6_htable[inet_sk(sk)->num &
69 (RAWV6_HTABLE_SIZE - 1)];
70
71 write_lock_bh(&raw_v6_lock);
72 sk_add_node(sk, list);
73 sock_prot_inc_use(sk->sk_prot);
74 write_unlock_bh(&raw_v6_lock);
75}
76
77static void raw_v6_unhash(struct sock *sk)
78{
79 write_lock_bh(&raw_v6_lock);
80 if (sk_del_node_init(sk))
81 sock_prot_dec_use(sk->sk_prot);
82 write_unlock_bh(&raw_v6_lock);
83}
84
85
86/* Grumble... icmp and ip_input want to get at this... */
87struct sock *__raw_v6_lookup(struct sock *sk, unsigned short num,
Andrew McDonald0bd1b592005-08-09 19:44:42 -070088 struct in6_addr *loc_addr, struct in6_addr *rmt_addr,
89 int dif)
Linus Torvalds1da177e2005-04-16 15:20:36 -070090{
91 struct hlist_node *node;
92 int is_multicast = ipv6_addr_is_multicast(loc_addr);
93
94 sk_for_each_from(sk, node)
95 if (inet_sk(sk)->num == num) {
96 struct ipv6_pinfo *np = inet6_sk(sk);
97
98 if (!ipv6_addr_any(&np->daddr) &&
99 !ipv6_addr_equal(&np->daddr, rmt_addr))
100 continue;
101
Andrew McDonald0bd1b592005-08-09 19:44:42 -0700102 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
103 continue;
104
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 if (!ipv6_addr_any(&np->rcv_saddr)) {
106 if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
107 goto found;
108 if (is_multicast &&
109 inet6_mc_check(sk, loc_addr, rmt_addr))
110 goto found;
111 continue;
112 }
113 goto found;
114 }
115 sk = NULL;
116found:
117 return sk;
118}
119
120/*
121 * 0 - deliver
122 * 1 - block
123 */
124static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
125{
126 struct icmp6hdr *icmph;
127 struct raw6_sock *rp = raw6_sk(sk);
128
129 if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) {
130 __u32 *data = &rp->filter.data[0];
131 int bit_nr;
132
133 icmph = (struct icmp6hdr *) skb->data;
134 bit_nr = icmph->icmp6_type;
135
136 return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0;
137 }
138 return 0;
139}
140
141/*
142 * demultiplex raw sockets.
143 * (should consider queueing the skb in the sock receive_queue
144 * without calling rawv6.c)
145 *
146 * Caller owns SKB so we must make clones.
147 */
Patrick McHardyd13964f2005-08-09 19:45:02 -0700148int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149{
150 struct in6_addr *saddr;
151 struct in6_addr *daddr;
152 struct sock *sk;
Patrick McHardyd13964f2005-08-09 19:45:02 -0700153 int delivered = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 __u8 hash;
155
156 saddr = &skb->nh.ipv6h->saddr;
157 daddr = saddr + 1;
158
159 hash = nexthdr & (MAX_INET_PROTOS - 1);
160
161 read_lock(&raw_v6_lock);
162 sk = sk_head(&raw_v6_htable[hash]);
163
164 /*
165 * The first socket found will be delivered after
166 * delivery to transport protocols.
167 */
168
169 if (sk == NULL)
170 goto out;
171
YOSHIFUJI Hideaki2dac4b92005-09-01 17:44:49 -0700172 sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
174 while (sk) {
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700175 int filtered;
176
Patrick McHardyd13964f2005-08-09 19:45:02 -0700177 delivered = 1;
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700178 switch (nexthdr) {
179 case IPPROTO_ICMPV6:
180 filtered = icmpv6_filter(sk, skb);
181 break;
182#ifdef CONFIG_IPV6_MIP6
183 case IPPROTO_MH:
184 /* XXX: To validate MH only once for each packet,
185 * this is placed here. It should be after checking
186 * xfrm policy, however it doesn't. The checking xfrm
187 * policy is placed in rawv6_rcv() because it is
188 * required for each socket.
189 */
190 filtered = mip6_mh_filter(sk, skb);
191 break;
192#endif
193 default:
194 filtered = 0;
195 break;
196 }
197
198 if (filtered < 0)
199 break;
200 if (filtered == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
202
203 /* Not releasing hash table! */
Yasuyuki Kozakai9fb9cbb2005-11-09 16:38:16 -0800204 if (clone) {
205 nf_reset(clone);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 rawv6_rcv(sk, clone);
Yasuyuki Kozakai9fb9cbb2005-11-09 16:38:16 -0800207 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 }
Andrew McDonald0bd1b592005-08-09 19:44:42 -0700209 sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr,
YOSHIFUJI Hideaki2dac4b92005-09-01 17:44:49 -0700210 IP6CB(skb)->iif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 }
212out:
213 read_unlock(&raw_v6_lock);
Patrick McHardyd13964f2005-08-09 19:45:02 -0700214 return delivered;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215}
216
217/* This cleans up af_inet6 a bit. -DaveM */
218static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
219{
220 struct inet_sock *inet = inet_sk(sk);
221 struct ipv6_pinfo *np = inet6_sk(sk);
222 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
Al Viroe69a4ad2006-11-14 20:56:00 -0800223 __be32 v4addr = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 int addr_type;
225 int err;
226
227 if (addr_len < SIN6_LEN_RFC2133)
228 return -EINVAL;
229 addr_type = ipv6_addr_type(&addr->sin6_addr);
230
231 /* Raw sockets are IPv6 only */
232 if (addr_type == IPV6_ADDR_MAPPED)
233 return(-EADDRNOTAVAIL);
234
235 lock_sock(sk);
236
237 err = -EINVAL;
238 if (sk->sk_state != TCP_CLOSE)
239 goto out;
240
241 /* Check if the address belongs to the host. */
242 if (addr_type != IPV6_ADDR_ANY) {
243 struct net_device *dev = NULL;
244
245 if (addr_type & IPV6_ADDR_LINKLOCAL) {
246 if (addr_len >= sizeof(struct sockaddr_in6) &&
247 addr->sin6_scope_id) {
248 /* Override any existing binding, if another
249 * one is supplied by user.
250 */
251 sk->sk_bound_dev_if = addr->sin6_scope_id;
252 }
253
254 /* Binding to link-local address requires an interface */
255 if (!sk->sk_bound_dev_if)
256 goto out;
257
258 dev = dev_get_by_index(sk->sk_bound_dev_if);
259 if (!dev) {
260 err = -ENODEV;
261 goto out;
262 }
263 }
264
265 /* ipv4 addr of the socket is invalid. Only the
266 * unspecified and mapped address have a v4 equivalent.
267 */
268 v4addr = LOOPBACK4_IPV6;
269 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
270 err = -EADDRNOTAVAIL;
271 if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) {
272 if (dev)
273 dev_put(dev);
274 goto out;
275 }
276 }
277 if (dev)
278 dev_put(dev);
279 }
280
281 inet->rcv_saddr = inet->saddr = v4addr;
282 ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
283 if (!(addr_type & IPV6_ADDR_MULTICAST))
284 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
285 err = 0;
286out:
287 release_sock(sk);
288 return err;
289}
290
291void rawv6_err(struct sock *sk, struct sk_buff *skb,
292 struct inet6_skb_parm *opt,
Al Viro04ce6902006-11-08 00:21:01 -0800293 int type, int code, int offset, __be32 info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294{
295 struct inet_sock *inet = inet_sk(sk);
296 struct ipv6_pinfo *np = inet6_sk(sk);
297 int err;
298 int harderr;
299
300 /* Report error on raw socket, if:
301 1. User requested recverr.
302 2. Socket is connected (otherwise the error indication
303 is useless without recverr and error is hard.
304 */
305 if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
306 return;
307
308 harderr = icmpv6_err_convert(type, code, &err);
309 if (type == ICMPV6_PKT_TOOBIG)
310 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
311
312 if (np->recverr) {
313 u8 *payload = skb->data;
314 if (!inet->hdrincl)
315 payload += offset;
316 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
317 }
318
319 if (np->recverr || harderr) {
320 sk->sk_err = err;
321 sk->sk_error_report(sk);
322 }
323}
324
325static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
326{
327 if ((raw6_sk(sk)->checksum || sk->sk_filter) &&
Herbert Xufb286bb2005-11-10 13:01:24 -0800328 skb_checksum_complete(skb)) {
329 /* FIXME: increment a raw6 drops counter here */
330 kfree_skb(skb);
331 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 }
333
334 /* Charge it to the socket. */
335 if (sock_queue_rcv_skb(sk,skb)<0) {
336 /* FIXME: increment a raw6 drops counter here */
337 kfree_skb(skb);
338 return 0;
339 }
340
341 return 0;
342}
343
344/*
345 * This is next to useless...
346 * if we demultiplex in network layer we don't need the extra call
347 * just to queue the skb...
348 * maybe we could have the network decide upon a hint if it
349 * should call raw_rcv for demultiplexing
350 */
351int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
352{
353 struct inet_sock *inet = inet_sk(sk);
354 struct raw6_sock *rp = raw6_sk(sk);
355
356 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
357 kfree_skb(skb);
358 return NET_RX_DROP;
359 }
360
361 if (!rp->checksum)
362 skb->ip_summed = CHECKSUM_UNNECESSARY;
363
Patrick McHardy84fa7932006-08-29 16:44:56 -0700364 if (skb->ip_summed == CHECKSUM_COMPLETE) {
Herbert Xufb286bb2005-11-10 13:01:24 -0800365 skb_postpull_rcsum(skb, skb->nh.raw,
366 skb->h.raw - skb->nh.raw);
367 if (!csum_ipv6_magic(&skb->nh.ipv6h->saddr,
368 &skb->nh.ipv6h->daddr,
369 skb->len, inet->num, skb->csum))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 skb->ip_summed = CHECKSUM_UNNECESSARY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 }
Herbert Xufb286bb2005-11-10 13:01:24 -0800372 if (skb->ip_summed != CHECKSUM_UNNECESSARY)
Al Viro868c86b2006-11-14 21:35:48 -0800373 skb->csum = ~csum_unfold(csum_ipv6_magic(&skb->nh.ipv6h->saddr,
Herbert Xufb286bb2005-11-10 13:01:24 -0800374 &skb->nh.ipv6h->daddr,
Al Viro868c86b2006-11-14 21:35:48 -0800375 skb->len, inet->num, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376
377 if (inet->hdrincl) {
Herbert Xufb286bb2005-11-10 13:01:24 -0800378 if (skb_checksum_complete(skb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 /* FIXME: increment a raw6 drops counter here */
380 kfree_skb(skb);
381 return 0;
382 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 }
384
385 rawv6_rcv_skb(sk, skb);
386 return 0;
387}
388
389
390/*
391 * This should be easy, if there is something there
392 * we return it, otherwise we block.
393 */
394
395static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
396 struct msghdr *msg, size_t len,
397 int noblock, int flags, int *addr_len)
398{
399 struct ipv6_pinfo *np = inet6_sk(sk);
400 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
401 struct sk_buff *skb;
402 size_t copied;
403 int err;
404
405 if (flags & MSG_OOB)
406 return -EOPNOTSUPP;
407
408 if (addr_len)
409 *addr_len=sizeof(*sin6);
410
411 if (flags & MSG_ERRQUEUE)
412 return ipv6_recv_error(sk, msg, len);
413
414 skb = skb_recv_datagram(sk, flags, noblock, &err);
415 if (!skb)
416 goto out;
417
418 copied = skb->len;
419 if (copied > len) {
420 copied = len;
421 msg->msg_flags |= MSG_TRUNC;
422 }
423
424 if (skb->ip_summed==CHECKSUM_UNNECESSARY) {
425 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
426 } else if (msg->msg_flags&MSG_TRUNC) {
Herbert Xufb286bb2005-11-10 13:01:24 -0800427 if (__skb_checksum_complete(skb))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 goto csum_copy_err;
429 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
430 } else {
431 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
432 if (err == -EINVAL)
433 goto csum_copy_err;
434 }
435 if (err)
436 goto out_free;
437
438 /* Copy the address. */
439 if (sin6) {
440 sin6->sin6_family = AF_INET6;
Tetsuo Handaf59fc7f2006-07-25 17:05:35 -0700441 sin6->sin6_port = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr);
443 sin6->sin6_flowinfo = 0;
444 sin6->sin6_scope_id = 0;
445 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
446 sin6->sin6_scope_id = IP6CB(skb)->iif;
447 }
448
449 sock_recv_timestamp(msg, sk, skb);
450
451 if (np->rxopt.all)
452 datagram_recv_ctl(sk, msg, skb);
453
454 err = copied;
455 if (flags & MSG_TRUNC)
456 err = skb->len;
457
458out_free:
459 skb_free_datagram(sk, skb);
460out:
461 return err;
462
463csum_copy_err:
Herbert Xu3305b802005-12-13 23:16:37 -0800464 skb_kill_datagram(sk, skb, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465
466 /* Error for blocking case is chosen to masquerade
467 as some normal condition.
468 */
469 err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
470 /* FIXME: increment a raw6 drops counter here */
Herbert Xu3305b802005-12-13 23:16:37 -0800471 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472}
473
474static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
Herbert Xu357b40a2005-04-19 22:30:14 -0700475 struct raw6_sock *rp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476{
477 struct sk_buff *skb;
478 int err = 0;
Herbert Xu357b40a2005-04-19 22:30:14 -0700479 int offset;
480 int len;
Herbert Xu679a8732005-05-03 14:24:36 -0700481 int total_len;
Al Viro868c86b2006-11-14 21:35:48 -0800482 __wsum tmp_csum;
483 __sum16 csum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484
485 if (!rp->checksum)
486 goto send;
487
488 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
489 goto out;
490
Herbert Xu357b40a2005-04-19 22:30:14 -0700491 offset = rp->offset;
Herbert Xu679a8732005-05-03 14:24:36 -0700492 total_len = inet_sk(sk)->cork.length - (skb->nh.raw - skb->data);
493 if (offset >= total_len - 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 err = -EINVAL;
Herbert Xu357b40a2005-04-19 22:30:14 -0700495 ip6_flush_pending_frames(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 goto out;
497 }
498
499 /* should be check HW csum miyazawa */
500 if (skb_queue_len(&sk->sk_write_queue) == 1) {
501 /*
502 * Only one fragment on the socket.
503 */
504 tmp_csum = skb->csum;
505 } else {
Herbert Xu357b40a2005-04-19 22:30:14 -0700506 struct sk_buff *csum_skb = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 tmp_csum = 0;
508
509 skb_queue_walk(&sk->sk_write_queue, skb) {
510 tmp_csum = csum_add(tmp_csum, skb->csum);
Herbert Xu357b40a2005-04-19 22:30:14 -0700511
512 if (csum_skb)
513 continue;
514
515 len = skb->len - (skb->h.raw - skb->data);
516 if (offset >= len) {
517 offset -= len;
518 continue;
519 }
520
521 csum_skb = skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 }
Herbert Xu357b40a2005-04-19 22:30:14 -0700523
524 skb = csum_skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 }
526
Herbert Xu357b40a2005-04-19 22:30:14 -0700527 offset += skb->h.raw - skb->data;
528 if (skb_copy_bits(skb, offset, &csum, 2))
529 BUG();
530
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 /* in case cksum was not initialized */
Herbert Xu357b40a2005-04-19 22:30:14 -0700532 if (unlikely(csum))
Al Viro5f92a732006-11-14 21:36:54 -0800533 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534
Al Viro868c86b2006-11-14 21:35:48 -0800535 csum = csum_ipv6_magic(&fl->fl6_src,
Herbert Xu357b40a2005-04-19 22:30:14 -0700536 &fl->fl6_dst,
Herbert Xu679a8732005-05-03 14:24:36 -0700537 total_len, fl->proto, tmp_csum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538
Al Virof6ab0282006-11-16 02:36:50 -0800539 if (csum == 0 && fl->proto == IPPROTO_UDP)
540 csum = CSUM_MANGLED_0;
Herbert Xu357b40a2005-04-19 22:30:14 -0700541
Herbert Xu357b40a2005-04-19 22:30:14 -0700542 if (skb_store_bits(skb, offset, &csum, 2))
543 BUG();
544
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545send:
546 err = ip6_push_pending_frames(sk);
547out:
548 return err;
549}
550
551static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
552 struct flowi *fl, struct rt6_info *rt,
553 unsigned int flags)
554{
Herbert Xu3320da82005-04-19 22:32:22 -0700555 struct ipv6_pinfo *np = inet6_sk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 struct ipv6hdr *iph;
557 struct sk_buff *skb;
558 unsigned int hh_len;
559 int err;
560
561 if (length > rt->u.dst.dev->mtu) {
562 ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
563 return -EMSGSIZE;
564 }
565 if (flags&MSG_PROBE)
566 goto out;
567
568 hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
569
570 skb = sock_alloc_send_skb(sk, length+hh_len+15,
571 flags&MSG_DONTWAIT, &err);
572 if (skb == NULL)
573 goto error;
574 skb_reserve(skb, hh_len);
575
576 skb->priority = sk->sk_priority;
577 skb->dst = dst_clone(&rt->u.dst);
578
579 skb->nh.ipv6h = iph = (struct ipv6hdr *)skb_put(skb, length);
580
581 skb->ip_summed = CHECKSUM_NONE;
582
583 skb->h.raw = skb->nh.raw;
584 err = memcpy_fromiovecend((void *)iph, from, 0, length);
585 if (err)
586 goto error_fault;
587
YOSHIFUJI Hideakia11d2062006-11-04 20:11:37 +0900588 IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
590 dst_output);
591 if (err > 0)
Herbert Xu3320da82005-04-19 22:32:22 -0700592 err = np->recverr ? net_xmit_errno(err) : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 if (err)
594 goto error;
595out:
596 return 0;
597
598error_fault:
599 err = -EFAULT;
600 kfree_skb(skb);
601error:
YOSHIFUJI Hideakia11d2062006-11-04 20:11:37 +0900602 IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 return err;
604}
605
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800606static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607{
608 struct iovec *iov;
609 u8 __user *type = NULL;
610 u8 __user *code = NULL;
Masahide NAKAMURA6e8f4d42006-08-23 20:36:47 -0700611#ifdef CONFIG_IPV6_MIP6
612 u8 len = 0;
613#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 int probed = 0;
615 int i;
616
617 if (!msg->msg_iov)
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800618 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619
620 for (i = 0; i < msg->msg_iovlen; i++) {
621 iov = &msg->msg_iov[i];
622 if (!iov)
623 continue;
624
625 switch (fl->proto) {
626 case IPPROTO_ICMPV6:
627 /* check if one-byte field is readable or not. */
628 if (iov->iov_base && iov->iov_len < 1)
629 break;
630
631 if (!type) {
632 type = iov->iov_base;
633 /* check if code field is readable or not. */
634 if (iov->iov_len > 1)
635 code = type + 1;
636 } else if (!code)
637 code = iov->iov_base;
638
639 if (type && code) {
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800640 if (get_user(fl->fl_icmp_type, type) ||
641 get_user(fl->fl_icmp_code, code))
642 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 probed = 1;
644 }
645 break;
Masahide NAKAMURA6e8f4d42006-08-23 20:36:47 -0700646#ifdef CONFIG_IPV6_MIP6
647 case IPPROTO_MH:
648 if (iov->iov_base && iov->iov_len < 1)
649 break;
650 /* check if type field is readable or not. */
651 if (iov->iov_len > 2 - len) {
652 u8 __user *p = iov->iov_base;
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800653 if (get_user(fl->fl_mh_type, &p[2 - len]))
654 return -EFAULT;
Masahide NAKAMURA6e8f4d42006-08-23 20:36:47 -0700655 probed = 1;
656 } else
657 len += iov->iov_len;
658
659 break;
660#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 default:
662 probed = 1;
663 break;
664 }
665 if (probed)
666 break;
667 }
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800668 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669}
670
671static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
672 struct msghdr *msg, size_t len)
673{
674 struct ipv6_txoptions opt_space;
675 struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
676 struct in6_addr *daddr, *final_p = NULL, final;
677 struct inet_sock *inet = inet_sk(sk);
678 struct ipv6_pinfo *np = inet6_sk(sk);
679 struct raw6_sock *rp = raw6_sk(sk);
680 struct ipv6_txoptions *opt = NULL;
681 struct ip6_flowlabel *flowlabel = NULL;
682 struct dst_entry *dst = NULL;
683 struct flowi fl;
684 int addr_len = msg->msg_namelen;
685 int hlimit = -1;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900686 int tclass = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 u16 proto;
688 int err;
689
690 /* Rough check on arithmetic overflow,
691 better check is made in ip6_build_xmit
692 */
693 if (len < 0)
694 return -EMSGSIZE;
695
696 /* Mirror BSD error message compatibility */
697 if (msg->msg_flags & MSG_OOB)
698 return -EOPNOTSUPP;
699
700 /*
701 * Get and verify the address.
702 */
703 memset(&fl, 0, sizeof(fl));
704
705 if (sin6) {
706 if (addr_len < SIN6_LEN_RFC2133)
707 return -EINVAL;
708
709 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
710 return(-EAFNOSUPPORT);
711
712 /* port is the proto value [0..255] carried in nexthdr */
713 proto = ntohs(sin6->sin6_port);
714
715 if (!proto)
716 proto = inet->num;
717 else if (proto != inet->num)
718 return(-EINVAL);
719
720 if (proto > 255)
721 return(-EINVAL);
722
723 daddr = &sin6->sin6_addr;
724 if (np->sndflow) {
725 fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
726 if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
727 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
728 if (flowlabel == NULL)
729 return -EINVAL;
730 daddr = &flowlabel->dst;
731 }
732 }
733
734 /*
735 * Otherwise it will be difficult to maintain
736 * sk->sk_dst_cache.
737 */
738 if (sk->sk_state == TCP_ESTABLISHED &&
739 ipv6_addr_equal(daddr, &np->daddr))
740 daddr = &np->daddr;
741
742 if (addr_len >= sizeof(struct sockaddr_in6) &&
743 sin6->sin6_scope_id &&
744 ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
745 fl.oif = sin6->sin6_scope_id;
746 } else {
747 if (sk->sk_state != TCP_ESTABLISHED)
748 return -EDESTADDRREQ;
749
750 proto = inet->num;
751 daddr = &np->daddr;
752 fl.fl6_flowlabel = np->flow_label;
753 }
754
755 if (ipv6_addr_any(daddr)) {
756 /*
757 * unspecified destination address
758 * treated as error... is this correct ?
759 */
760 fl6_sock_release(flowlabel);
761 return(-EINVAL);
762 }
763
764 if (fl.oif == 0)
765 fl.oif = sk->sk_bound_dev_if;
766
767 if (msg->msg_controllen) {
768 opt = &opt_space;
769 memset(opt, 0, sizeof(struct ipv6_txoptions));
770 opt->tot_len = sizeof(struct ipv6_txoptions);
771
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900772 err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 if (err < 0) {
774 fl6_sock_release(flowlabel);
775 return err;
776 }
777 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
778 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
779 if (flowlabel == NULL)
780 return -EINVAL;
781 }
782 if (!(opt->opt_nflen|opt->opt_flen))
783 opt = NULL;
784 }
785 if (opt == NULL)
786 opt = np->opt;
YOSHIFUJI Hideakidf9890c2005-11-20 12:23:18 +0900787 if (flowlabel)
788 opt = fl6_merge_options(&opt_space, flowlabel, opt);
789 opt = ipv6_fixup_options(&opt_space, opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790
791 fl.proto = proto;
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800792 err = rawv6_probe_proto_opt(&fl, msg);
793 if (err)
794 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795
796 ipv6_addr_copy(&fl.fl6_dst, daddr);
797 if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
798 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
799
800 /* merge ip6_build_xmit from ip6_output */
801 if (opt && opt->srcrt) {
802 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
803 ipv6_addr_copy(&final, &fl.fl6_dst);
804 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
805 final_p = &final;
806 }
807
808 if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
809 fl.oif = np->mcast_oif;
Venkat Yekkiralabeb8d132006-08-04 23:12:42 -0700810 security_sk_classify_flow(sk, &fl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811
812 err = ip6_dst_lookup(sk, &dst, &fl);
813 if (err)
814 goto out;
815 if (final_p)
816 ipv6_addr_copy(&fl.fl6_dst, final_p);
817
Patrick McHardye1044112005-09-08 15:11:55 -0700818 if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820
821 if (hlimit < 0) {
822 if (ipv6_addr_is_multicast(&fl.fl6_dst))
823 hlimit = np->mcast_hops;
824 else
825 hlimit = np->hop_limit;
826 if (hlimit < 0)
827 hlimit = dst_metric(dst, RTAX_HOPLIMIT);
828 if (hlimit < 0)
829 hlimit = ipv6_get_hoplimit(dst->dev);
830 }
831
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900832 if (tclass < 0) {
YOSHIFUJI Hideakie012d512006-09-13 20:01:28 -0700833 tclass = np->tclass;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900834 if (tclass < 0)
835 tclass = 0;
836 }
837
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 if (msg->msg_flags&MSG_CONFIRM)
839 goto do_confirm;
840
841back_from_confirm:
842 if (inet->hdrincl) {
843 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
844 } else {
845 lock_sock(sk);
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900846 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
847 len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
848 msg->msg_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849
850 if (err)
851 ip6_flush_pending_frames(sk);
852 else if (!(msg->msg_flags & MSG_MORE))
Herbert Xu357b40a2005-04-19 22:30:14 -0700853 err = rawv6_push_pending_frames(sk, &fl, rp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854 }
855done:
Nicolas DICHTEL6d3e85e2006-02-13 15:56:13 -0800856 dst_release(dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 release_sock(sk);
858out:
859 fl6_sock_release(flowlabel);
860 return err<0?err:len;
861do_confirm:
862 dst_confirm(dst);
863 if (!(msg->msg_flags & MSG_PROBE) || len)
864 goto back_from_confirm;
865 err = 0;
866 goto done;
867}
868
869static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
870 char __user *optval, int optlen)
871{
872 switch (optname) {
873 case ICMPV6_FILTER:
874 if (optlen > sizeof(struct icmp6_filter))
875 optlen = sizeof(struct icmp6_filter);
876 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
877 return -EFAULT;
878 return 0;
879 default:
880 return -ENOPROTOOPT;
881 };
882
883 return 0;
884}
885
886static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
887 char __user *optval, int __user *optlen)
888{
889 int len;
890
891 switch (optname) {
892 case ICMPV6_FILTER:
893 if (get_user(len, optlen))
894 return -EFAULT;
895 if (len < 0)
896 return -EINVAL;
897 if (len > sizeof(struct icmp6_filter))
898 len = sizeof(struct icmp6_filter);
899 if (put_user(len, optlen))
900 return -EFAULT;
901 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
902 return -EFAULT;
903 return 0;
904 default:
905 return -ENOPROTOOPT;
906 };
907
908 return 0;
909}
910
911
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800912static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 char __user *optval, int optlen)
914{
915 struct raw6_sock *rp = raw6_sk(sk);
916 int val;
917
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918 if (get_user(val, (int __user *)optval))
919 return -EFAULT;
920
921 switch (optname) {
922 case IPV6_CHECKSUM:
923 /* You may get strange result with a positive odd offset;
924 RFC2292bis agrees with me. */
925 if (val > 0 && (val&1))
926 return(-EINVAL);
927 if (val < 0) {
928 rp->checksum = 0;
929 } else {
930 rp->checksum = 1;
931 rp->offset = val;
932 }
933
934 return 0;
935 break;
936
937 default:
938 return(-ENOPROTOOPT);
939 }
940}
941
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800942static int rawv6_setsockopt(struct sock *sk, int level, int optname,
943 char __user *optval, int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 switch(level) {
946 case SOL_RAW:
947 break;
948
949 case SOL_ICMPV6:
950 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
951 return -EOPNOTSUPP;
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800952 return rawv6_seticmpfilter(sk, level, optname, optval,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953 optlen);
954 case SOL_IPV6:
955 if (optname == IPV6_CHECKSUM)
956 break;
957 default:
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800958 return ipv6_setsockopt(sk, level, optname, optval,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 optlen);
960 };
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800961 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
962}
963
964#ifdef CONFIG_COMPAT
965static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800966 char __user *optval, int optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800967{
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800968 switch (level) {
969 case SOL_RAW:
970 break;
971 case SOL_ICMPV6:
972 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
973 return -EOPNOTSUPP;
974 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
975 case SOL_IPV6:
976 if (optname == IPV6_CHECKSUM)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800977 break;
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800978 default:
979 return compat_ipv6_setsockopt(sk, level, optname,
980 optval, optlen);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800981 };
982 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
983}
984#endif
985
986static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
987 char __user *optval, int __user *optlen)
988{
989 struct raw6_sock *rp = raw6_sk(sk);
990 int val, len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991
992 if (get_user(len,optlen))
993 return -EFAULT;
994
995 switch (optname) {
996 case IPV6_CHECKSUM:
997 if (rp->checksum == 0)
998 val = -1;
999 else
1000 val = rp->offset;
1001 break;
1002
1003 default:
1004 return -ENOPROTOOPT;
1005 }
1006
1007 len = min_t(unsigned int, sizeof(int), len);
1008
1009 if (put_user(len, optlen))
1010 return -EFAULT;
1011 if (copy_to_user(optval,&val,len))
1012 return -EFAULT;
1013 return 0;
1014}
1015
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001016static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1017 char __user *optval, int __user *optlen)
1018{
1019 switch(level) {
1020 case SOL_RAW:
1021 break;
1022
1023 case SOL_ICMPV6:
1024 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1025 return -EOPNOTSUPP;
1026 return rawv6_geticmpfilter(sk, level, optname, optval,
1027 optlen);
1028 case SOL_IPV6:
1029 if (optname == IPV6_CHECKSUM)
1030 break;
1031 default:
1032 return ipv6_getsockopt(sk, level, optname, optval,
1033 optlen);
1034 };
1035 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1036}
1037
1038#ifdef CONFIG_COMPAT
1039static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001040 char __user *optval, int __user *optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001041{
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001042 switch (level) {
1043 case SOL_RAW:
1044 break;
1045 case SOL_ICMPV6:
1046 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1047 return -EOPNOTSUPP;
1048 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1049 case SOL_IPV6:
1050 if (optname == IPV6_CHECKSUM)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001051 break;
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001052 default:
1053 return compat_ipv6_getsockopt(sk, level, optname,
1054 optval, optlen);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001055 };
1056 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1057}
1058#endif
1059
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1061{
1062 switch(cmd) {
1063 case SIOCOUTQ:
1064 {
1065 int amount = atomic_read(&sk->sk_wmem_alloc);
1066 return put_user(amount, (int __user *)arg);
1067 }
1068 case SIOCINQ:
1069 {
1070 struct sk_buff *skb;
1071 int amount = 0;
1072
Herbert Xue0f9f852005-06-18 22:56:18 -07001073 spin_lock_bh(&sk->sk_receive_queue.lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074 skb = skb_peek(&sk->sk_receive_queue);
1075 if (skb != NULL)
1076 amount = skb->tail - skb->h.raw;
Herbert Xue0f9f852005-06-18 22:56:18 -07001077 spin_unlock_bh(&sk->sk_receive_queue.lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 return put_user(amount, (int __user *)arg);
1079 }
1080
1081 default:
1082 return -ENOIOCTLCMD;
1083 }
1084}
1085
1086static void rawv6_close(struct sock *sk, long timeout)
1087{
1088 if (inet_sk(sk)->num == IPPROTO_RAW)
1089 ip6_ra_control(sk, -1, NULL);
1090
1091 sk_common_release(sk);
1092}
1093
1094static int rawv6_init_sk(struct sock *sk)
1095{
1096 if (inet_sk(sk)->num == IPPROTO_ICMPV6) {
1097 struct raw6_sock *rp = raw6_sk(sk);
1098 rp->checksum = 1;
1099 rp->offset = 2;
1100 }
1101 return(0);
1102}
1103
1104struct proto rawv6_prot = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001105 .name = "RAWv6",
1106 .owner = THIS_MODULE,
1107 .close = rawv6_close,
1108 .connect = ip6_datagram_connect,
1109 .disconnect = udp_disconnect,
1110 .ioctl = rawv6_ioctl,
1111 .init = rawv6_init_sk,
1112 .destroy = inet6_destroy_sock,
1113 .setsockopt = rawv6_setsockopt,
1114 .getsockopt = rawv6_getsockopt,
1115 .sendmsg = rawv6_sendmsg,
1116 .recvmsg = rawv6_recvmsg,
1117 .bind = rawv6_bind,
1118 .backlog_rcv = rawv6_rcv_skb,
1119 .hash = raw_v6_hash,
1120 .unhash = raw_v6_unhash,
1121 .obj_size = sizeof(struct raw6_sock),
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001122#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001123 .compat_setsockopt = compat_rawv6_setsockopt,
1124 .compat_getsockopt = compat_rawv6_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001125#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126};
1127
1128#ifdef CONFIG_PROC_FS
1129struct raw6_iter_state {
1130 int bucket;
1131};
1132
1133#define raw6_seq_private(seq) ((struct raw6_iter_state *)(seq)->private)
1134
1135static struct sock *raw6_get_first(struct seq_file *seq)
1136{
1137 struct sock *sk;
1138 struct hlist_node *node;
1139 struct raw6_iter_state* state = raw6_seq_private(seq);
1140
1141 for (state->bucket = 0; state->bucket < RAWV6_HTABLE_SIZE; ++state->bucket)
1142 sk_for_each(sk, node, &raw_v6_htable[state->bucket])
1143 if (sk->sk_family == PF_INET6)
1144 goto out;
1145 sk = NULL;
1146out:
1147 return sk;
1148}
1149
1150static struct sock *raw6_get_next(struct seq_file *seq, struct sock *sk)
1151{
1152 struct raw6_iter_state* state = raw6_seq_private(seq);
1153
1154 do {
1155 sk = sk_next(sk);
1156try_again:
1157 ;
1158 } while (sk && sk->sk_family != PF_INET6);
1159
1160 if (!sk && ++state->bucket < RAWV6_HTABLE_SIZE) {
1161 sk = sk_head(&raw_v6_htable[state->bucket]);
1162 goto try_again;
1163 }
1164 return sk;
1165}
1166
1167static struct sock *raw6_get_idx(struct seq_file *seq, loff_t pos)
1168{
1169 struct sock *sk = raw6_get_first(seq);
1170 if (sk)
1171 while (pos && (sk = raw6_get_next(seq, sk)) != NULL)
1172 --pos;
1173 return pos ? NULL : sk;
1174}
1175
1176static void *raw6_seq_start(struct seq_file *seq, loff_t *pos)
1177{
1178 read_lock(&raw_v6_lock);
1179 return *pos ? raw6_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
1180}
1181
1182static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1183{
1184 struct sock *sk;
1185
1186 if (v == SEQ_START_TOKEN)
1187 sk = raw6_get_first(seq);
1188 else
1189 sk = raw6_get_next(seq, v);
1190 ++*pos;
1191 return sk;
1192}
1193
1194static void raw6_seq_stop(struct seq_file *seq, void *v)
1195{
1196 read_unlock(&raw_v6_lock);
1197}
1198
1199static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1200{
1201 struct ipv6_pinfo *np = inet6_sk(sp);
1202 struct in6_addr *dest, *src;
1203 __u16 destp, srcp;
1204
1205 dest = &np->daddr;
1206 src = &np->rcv_saddr;
1207 destp = 0;
1208 srcp = inet_sk(sp)->num;
1209 seq_printf(seq,
1210 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1211 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n",
1212 i,
1213 src->s6_addr32[0], src->s6_addr32[1],
1214 src->s6_addr32[2], src->s6_addr32[3], srcp,
1215 dest->s6_addr32[0], dest->s6_addr32[1],
1216 dest->s6_addr32[2], dest->s6_addr32[3], destp,
1217 sp->sk_state,
1218 atomic_read(&sp->sk_wmem_alloc),
1219 atomic_read(&sp->sk_rmem_alloc),
1220 0, 0L, 0,
1221 sock_i_uid(sp), 0,
1222 sock_i_ino(sp),
1223 atomic_read(&sp->sk_refcnt), sp);
1224}
1225
1226static int raw6_seq_show(struct seq_file *seq, void *v)
1227{
1228 if (v == SEQ_START_TOKEN)
1229 seq_printf(seq,
1230 " sl "
1231 "local_address "
1232 "remote_address "
1233 "st tx_queue rx_queue tr tm->when retrnsmt"
1234 " uid timeout inode\n");
1235 else
1236 raw6_sock_seq_show(seq, v, raw6_seq_private(seq)->bucket);
1237 return 0;
1238}
1239
1240static struct seq_operations raw6_seq_ops = {
1241 .start = raw6_seq_start,
1242 .next = raw6_seq_next,
1243 .stop = raw6_seq_stop,
1244 .show = raw6_seq_show,
1245};
1246
1247static int raw6_seq_open(struct inode *inode, struct file *file)
1248{
1249 struct seq_file *seq;
1250 int rc = -ENOMEM;
Ingo Oeser0c600ed2006-03-20 23:01:32 -08001251 struct raw6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252 if (!s)
1253 goto out;
1254 rc = seq_open(file, &raw6_seq_ops);
1255 if (rc)
1256 goto out_kfree;
1257 seq = file->private_data;
1258 seq->private = s;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259out:
1260 return rc;
1261out_kfree:
1262 kfree(s);
1263 goto out;
1264}
1265
1266static struct file_operations raw6_seq_fops = {
1267 .owner = THIS_MODULE,
1268 .open = raw6_seq_open,
1269 .read = seq_read,
1270 .llseek = seq_lseek,
1271 .release = seq_release_private,
1272};
1273
1274int __init raw6_proc_init(void)
1275{
1276 if (!proc_net_fops_create("raw6", S_IRUGO, &raw6_seq_fops))
1277 return -ENOMEM;
1278 return 0;
1279}
1280
1281void raw6_proc_exit(void)
1282{
1283 proc_net_remove("raw6");
1284}
1285#endif /* CONFIG_PROC_FS */