Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * RAW sockets for IPv6 | |
1ab1457c | 3 | * Linux INET6 implementation |
1da177e4 LT |
4 | * |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
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 | |
1ab1457c | 14 | * YOSHIFUJI,H.@USAGI : raw checksum (RFC2292(bis) compliance) |
1da177e4 LT |
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> | |
1da177e4 LT |
27 | #include <linux/net.h> |
28 | #include <linux/in6.h> | |
29 | #include <linux/netdevice.h> | |
30 | #include <linux/if_arp.h> | |
31 | #include <linux/icmpv6.h> | |
32 | #include <linux/netfilter.h> | |
33 | #include <linux/netfilter_ipv6.h> | |
3305b80c | 34 | #include <linux/skbuff.h> |
1da177e4 LT |
35 | #include <asm/uaccess.h> |
36 | #include <asm/ioctls.h> | |
37 | ||
38 | #include <net/ip.h> | |
39 | #include <net/sock.h> | |
40 | #include <net/snmp.h> | |
41 | ||
42 | #include <net/ipv6.h> | |
43 | #include <net/ndisc.h> | |
44 | #include <net/protocol.h> | |
45 | #include <net/ip6_route.h> | |
46 | #include <net/ip6_checksum.h> | |
47 | #include <net/addrconf.h> | |
48 | #include <net/transp_v6.h> | |
49 | #include <net/udp.h> | |
50 | #include <net/inet_common.h> | |
c752f073 | 51 | #include <net/tcp_states.h> |
7be96f76 MN |
52 | #ifdef CONFIG_IPV6_MIP6 |
53 | #include <net/mip6.h> | |
54 | #endif | |
1da177e4 LT |
55 | |
56 | #include <net/rawv6.h> | |
57 | #include <net/xfrm.h> | |
58 | ||
59 | #include <linux/proc_fs.h> | |
60 | #include <linux/seq_file.h> | |
61 | ||
62 | struct hlist_head raw_v6_htable[RAWV6_HTABLE_SIZE]; | |
63 | DEFINE_RWLOCK(raw_v6_lock); | |
64 | ||
65 | static void raw_v6_hash(struct sock *sk) | |
66 | { | |
67 | struct hlist_head *list = &raw_v6_htable[inet_sk(sk)->num & | |
68 | (RAWV6_HTABLE_SIZE - 1)]; | |
69 | ||
70 | write_lock_bh(&raw_v6_lock); | |
71 | sk_add_node(sk, list); | |
72 | sock_prot_inc_use(sk->sk_prot); | |
1ab1457c | 73 | write_unlock_bh(&raw_v6_lock); |
1da177e4 LT |
74 | } |
75 | ||
76 | static void raw_v6_unhash(struct sock *sk) | |
77 | { | |
1ab1457c | 78 | write_lock_bh(&raw_v6_lock); |
1da177e4 LT |
79 | if (sk_del_node_init(sk)) |
80 | sock_prot_dec_use(sk->sk_prot); | |
81 | write_unlock_bh(&raw_v6_lock); | |
82 | } | |
83 | ||
84 | ||
85 | /* Grumble... icmp and ip_input want to get at this... */ | |
86 | struct sock *__raw_v6_lookup(struct sock *sk, unsigned short num, | |
0bd1b59b AM |
87 | struct in6_addr *loc_addr, struct in6_addr *rmt_addr, |
88 | int dif) | |
1da177e4 LT |
89 | { |
90 | struct hlist_node *node; | |
91 | int is_multicast = ipv6_addr_is_multicast(loc_addr); | |
92 | ||
93 | sk_for_each_from(sk, node) | |
94 | if (inet_sk(sk)->num == num) { | |
95 | struct ipv6_pinfo *np = inet6_sk(sk); | |
96 | ||
97 | if (!ipv6_addr_any(&np->daddr) && | |
98 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
99 | continue; | |
100 | ||
0bd1b59b AM |
101 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) |
102 | continue; | |
103 | ||
1da177e4 LT |
104 | if (!ipv6_addr_any(&np->rcv_saddr)) { |
105 | if (ipv6_addr_equal(&np->rcv_saddr, loc_addr)) | |
106 | goto found; | |
107 | if (is_multicast && | |
108 | inet6_mc_check(sk, loc_addr, rmt_addr)) | |
109 | goto found; | |
110 | continue; | |
111 | } | |
112 | goto found; | |
113 | } | |
114 | sk = NULL; | |
115 | found: | |
116 | return sk; | |
117 | } | |
118 | ||
119 | /* | |
120 | * 0 - deliver | |
121 | * 1 - block | |
122 | */ | |
123 | static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb) | |
124 | { | |
125 | struct icmp6hdr *icmph; | |
126 | struct raw6_sock *rp = raw6_sk(sk); | |
127 | ||
128 | if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) { | |
129 | __u32 *data = &rp->filter.data[0]; | |
130 | int bit_nr; | |
131 | ||
132 | icmph = (struct icmp6hdr *) skb->data; | |
133 | bit_nr = icmph->icmp6_type; | |
134 | ||
135 | return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0; | |
136 | } | |
137 | return 0; | |
138 | } | |
139 | ||
140 | /* | |
141 | * demultiplex raw sockets. | |
142 | * (should consider queueing the skb in the sock receive_queue | |
143 | * without calling rawv6.c) | |
144 | * | |
145 | * Caller owns SKB so we must make clones. | |
146 | */ | |
d13964f4 | 147 | int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) |
1da177e4 LT |
148 | { |
149 | struct in6_addr *saddr; | |
150 | struct in6_addr *daddr; | |
151 | struct sock *sk; | |
d13964f4 | 152 | int delivered = 0; |
1da177e4 LT |
153 | __u8 hash; |
154 | ||
0660e03f | 155 | saddr = &ipv6_hdr(skb)->saddr; |
1da177e4 LT |
156 | daddr = saddr + 1; |
157 | ||
158 | hash = nexthdr & (MAX_INET_PROTOS - 1); | |
159 | ||
160 | read_lock(&raw_v6_lock); | |
161 | sk = sk_head(&raw_v6_htable[hash]); | |
162 | ||
163 | /* | |
164 | * The first socket found will be delivered after | |
165 | * delivery to transport protocols. | |
166 | */ | |
167 | ||
168 | if (sk == NULL) | |
169 | goto out; | |
170 | ||
2dac4b96 | 171 | sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr, IP6CB(skb)->iif); |
1da177e4 LT |
172 | |
173 | while (sk) { | |
7be96f76 MN |
174 | int filtered; |
175 | ||
d13964f4 | 176 | delivered = 1; |
7be96f76 MN |
177 | switch (nexthdr) { |
178 | case IPPROTO_ICMPV6: | |
179 | filtered = icmpv6_filter(sk, skb); | |
180 | break; | |
181 | #ifdef CONFIG_IPV6_MIP6 | |
182 | case IPPROTO_MH: | |
183 | /* XXX: To validate MH only once for each packet, | |
184 | * this is placed here. It should be after checking | |
185 | * xfrm policy, however it doesn't. The checking xfrm | |
186 | * policy is placed in rawv6_rcv() because it is | |
187 | * required for each socket. | |
188 | */ | |
189 | filtered = mip6_mh_filter(sk, skb); | |
190 | break; | |
191 | #endif | |
192 | default: | |
193 | filtered = 0; | |
194 | break; | |
195 | } | |
196 | ||
197 | if (filtered < 0) | |
198 | break; | |
199 | if (filtered == 0) { | |
1da177e4 LT |
200 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); |
201 | ||
202 | /* Not releasing hash table! */ | |
9fb9cbb1 YK |
203 | if (clone) { |
204 | nf_reset(clone); | |
1da177e4 | 205 | rawv6_rcv(sk, clone); |
9fb9cbb1 | 206 | } |
1da177e4 | 207 | } |
0bd1b59b | 208 | sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr, |
2dac4b96 | 209 | IP6CB(skb)->iif); |
1da177e4 LT |
210 | } |
211 | out: | |
212 | read_unlock(&raw_v6_lock); | |
d13964f4 | 213 | return delivered; |
1da177e4 LT |
214 | } |
215 | ||
216 | /* This cleans up af_inet6 a bit. -DaveM */ | |
217 | static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
218 | { | |
219 | struct inet_sock *inet = inet_sk(sk); | |
220 | struct ipv6_pinfo *np = inet6_sk(sk); | |
221 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; | |
e69a4adc | 222 | __be32 v4addr = 0; |
1da177e4 LT |
223 | int addr_type; |
224 | int err; | |
225 | ||
226 | if (addr_len < SIN6_LEN_RFC2133) | |
227 | return -EINVAL; | |
228 | addr_type = ipv6_addr_type(&addr->sin6_addr); | |
229 | ||
230 | /* Raw sockets are IPv6 only */ | |
231 | if (addr_type == IPV6_ADDR_MAPPED) | |
232 | return(-EADDRNOTAVAIL); | |
233 | ||
234 | lock_sock(sk); | |
235 | ||
236 | err = -EINVAL; | |
237 | if (sk->sk_state != TCP_CLOSE) | |
238 | goto out; | |
239 | ||
240 | /* Check if the address belongs to the host. */ | |
241 | if (addr_type != IPV6_ADDR_ANY) { | |
242 | struct net_device *dev = NULL; | |
243 | ||
244 | if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
245 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
246 | addr->sin6_scope_id) { | |
247 | /* Override any existing binding, if another | |
248 | * one is supplied by user. | |
249 | */ | |
250 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
251 | } | |
1ab1457c | 252 | |
1da177e4 LT |
253 | /* Binding to link-local address requires an interface */ |
254 | if (!sk->sk_bound_dev_if) | |
255 | goto out; | |
256 | ||
257 | dev = dev_get_by_index(sk->sk_bound_dev_if); | |
258 | if (!dev) { | |
259 | err = -ENODEV; | |
260 | goto out; | |
261 | } | |
262 | } | |
1ab1457c | 263 | |
1da177e4 LT |
264 | /* ipv4 addr of the socket is invalid. Only the |
265 | * unspecified and mapped address have a v4 equivalent. | |
266 | */ | |
267 | v4addr = LOOPBACK4_IPV6; | |
268 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
269 | err = -EADDRNOTAVAIL; | |
270 | if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) { | |
271 | if (dev) | |
272 | dev_put(dev); | |
273 | goto out; | |
274 | } | |
275 | } | |
276 | if (dev) | |
277 | dev_put(dev); | |
278 | } | |
279 | ||
280 | inet->rcv_saddr = inet->saddr = v4addr; | |
281 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); | |
282 | if (!(addr_type & IPV6_ADDR_MULTICAST)) | |
283 | ipv6_addr_copy(&np->saddr, &addr->sin6_addr); | |
284 | err = 0; | |
285 | out: | |
286 | release_sock(sk); | |
287 | return err; | |
288 | } | |
289 | ||
290 | void rawv6_err(struct sock *sk, struct sk_buff *skb, | |
291 | struct inet6_skb_parm *opt, | |
04ce6909 | 292 | int type, int code, int offset, __be32 info) |
1da177e4 LT |
293 | { |
294 | struct inet_sock *inet = inet_sk(sk); | |
295 | struct ipv6_pinfo *np = inet6_sk(sk); | |
296 | int err; | |
297 | int harderr; | |
298 | ||
299 | /* Report error on raw socket, if: | |
300 | 1. User requested recverr. | |
301 | 2. Socket is connected (otherwise the error indication | |
302 | is useless without recverr and error is hard. | |
303 | */ | |
304 | if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) | |
305 | return; | |
306 | ||
307 | harderr = icmpv6_err_convert(type, code, &err); | |
308 | if (type == ICMPV6_PKT_TOOBIG) | |
309 | harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); | |
310 | ||
311 | if (np->recverr) { | |
312 | u8 *payload = skb->data; | |
313 | if (!inet->hdrincl) | |
314 | payload += offset; | |
315 | ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); | |
316 | } | |
317 | ||
318 | if (np->recverr || harderr) { | |
319 | sk->sk_err = err; | |
320 | sk->sk_error_report(sk); | |
321 | } | |
322 | } | |
323 | ||
324 | static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb) | |
325 | { | |
1ab1457c | 326 | if ((raw6_sk(sk)->checksum || sk->sk_filter) && |
fb286bb2 HX |
327 | skb_checksum_complete(skb)) { |
328 | /* FIXME: increment a raw6 drops counter here */ | |
329 | kfree_skb(skb); | |
330 | return 0; | |
1da177e4 LT |
331 | } |
332 | ||
333 | /* Charge it to the socket. */ | |
334 | if (sock_queue_rcv_skb(sk,skb)<0) { | |
335 | /* FIXME: increment a raw6 drops counter here */ | |
336 | kfree_skb(skb); | |
337 | return 0; | |
338 | } | |
339 | ||
340 | return 0; | |
341 | } | |
342 | ||
343 | /* | |
1ab1457c | 344 | * This is next to useless... |
1da177e4 | 345 | * if we demultiplex in network layer we don't need the extra call |
1ab1457c YH |
346 | * just to queue the skb... |
347 | * maybe we could have the network decide upon a hint if it | |
1da177e4 LT |
348 | * should call raw_rcv for demultiplexing |
349 | */ | |
350 | int rawv6_rcv(struct sock *sk, struct sk_buff *skb) | |
351 | { | |
352 | struct inet_sock *inet = inet_sk(sk); | |
353 | struct raw6_sock *rp = raw6_sk(sk); | |
354 | ||
1ab1457c YH |
355 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { |
356 | kfree_skb(skb); | |
357 | return NET_RX_DROP; | |
358 | } | |
1da177e4 LT |
359 | |
360 | if (!rp->checksum) | |
361 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
362 | ||
84fa7933 | 363 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
d56f90a7 | 364 | skb_postpull_rcsum(skb, skb_network_header(skb), |
1ab1457c | 365 | skb->h.raw - skb->nh.raw); |
0660e03f ACM |
366 | if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
367 | &ipv6_hdr(skb)->daddr, | |
fb286bb2 | 368 | skb->len, inet->num, skb->csum)) |
1da177e4 | 369 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1da177e4 | 370 | } |
fb286bb2 | 371 | if (skb->ip_summed != CHECKSUM_UNNECESSARY) |
0660e03f ACM |
372 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
373 | &ipv6_hdr(skb)->daddr, | |
374 | skb->len, | |
375 | inet->num, 0)); | |
1da177e4 LT |
376 | |
377 | if (inet->hdrincl) { | |
fb286bb2 | 378 | if (skb_checksum_complete(skb)) { |
1da177e4 LT |
379 | /* FIXME: increment a raw6 drops counter here */ |
380 | kfree_skb(skb); | |
381 | return 0; | |
382 | } | |
1da177e4 LT |
383 | } |
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 | ||
395 | static 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; | |
1ab1457c YH |
407 | |
408 | if (addr_len) | |
1da177e4 LT |
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; | |
1ab1457c YH |
419 | if (copied > len) { |
420 | copied = len; | |
421 | msg->msg_flags |= MSG_TRUNC; | |
422 | } | |
1da177e4 LT |
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) { | |
fb286bb2 | 427 | if (__skb_checksum_complete(skb)) |
1da177e4 LT |
428 | 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; | |
f59fc7f3 | 441 | sin6->sin6_port = 0; |
0660e03f | 442 | ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr); |
1da177e4 LT |
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 | ||
458 | out_free: | |
459 | skb_free_datagram(sk, skb); | |
460 | out: | |
461 | return err; | |
462 | ||
463 | csum_copy_err: | |
3305b80c | 464 | skb_kill_datagram(sk, skb, flags); |
1da177e4 LT |
465 | |
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 */ | |
3305b80c | 471 | goto out; |
1da177e4 LT |
472 | } |
473 | ||
474 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl, | |
357b40a1 | 475 | struct raw6_sock *rp) |
1da177e4 LT |
476 | { |
477 | struct sk_buff *skb; | |
478 | int err = 0; | |
357b40a1 HX |
479 | int offset; |
480 | int len; | |
679a8738 | 481 | int total_len; |
868c86bc AV |
482 | __wsum tmp_csum; |
483 | __sum16 csum; | |
1da177e4 LT |
484 | |
485 | if (!rp->checksum) | |
486 | goto send; | |
487 | ||
488 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
489 | goto out; | |
490 | ||
357b40a1 | 491 | offset = rp->offset; |
d56f90a7 ACM |
492 | total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) - |
493 | skb->data); | |
679a8738 | 494 | if (offset >= total_len - 1) { |
1da177e4 | 495 | err = -EINVAL; |
357b40a1 | 496 | ip6_flush_pending_frames(sk); |
1da177e4 LT |
497 | goto out; |
498 | } | |
499 | ||
500 | /* should be check HW csum miyazawa */ | |
501 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
502 | /* | |
503 | * Only one fragment on the socket. | |
504 | */ | |
505 | tmp_csum = skb->csum; | |
506 | } else { | |
357b40a1 | 507 | struct sk_buff *csum_skb = NULL; |
1da177e4 LT |
508 | tmp_csum = 0; |
509 | ||
510 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
511 | tmp_csum = csum_add(tmp_csum, skb->csum); | |
357b40a1 HX |
512 | |
513 | if (csum_skb) | |
514 | continue; | |
515 | ||
516 | len = skb->len - (skb->h.raw - skb->data); | |
517 | if (offset >= len) { | |
518 | offset -= len; | |
519 | continue; | |
520 | } | |
521 | ||
522 | csum_skb = skb; | |
1da177e4 | 523 | } |
357b40a1 HX |
524 | |
525 | skb = csum_skb; | |
1da177e4 LT |
526 | } |
527 | ||
357b40a1 HX |
528 | offset += skb->h.raw - skb->data; |
529 | if (skb_copy_bits(skb, offset, &csum, 2)) | |
530 | BUG(); | |
531 | ||
1da177e4 | 532 | /* in case cksum was not initialized */ |
357b40a1 | 533 | if (unlikely(csum)) |
5f92a738 | 534 | tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); |
357b40a1 | 535 | |
868c86bc | 536 | csum = csum_ipv6_magic(&fl->fl6_src, |
357b40a1 | 537 | &fl->fl6_dst, |
679a8738 | 538 | total_len, fl->proto, tmp_csum); |
357b40a1 | 539 | |
f6ab0288 AV |
540 | if (csum == 0 && fl->proto == IPPROTO_UDP) |
541 | csum = CSUM_MANGLED_0; | |
1da177e4 | 542 | |
357b40a1 HX |
543 | if (skb_store_bits(skb, offset, &csum, 2)) |
544 | BUG(); | |
1da177e4 | 545 | |
1da177e4 LT |
546 | send: |
547 | err = ip6_push_pending_frames(sk); | |
548 | out: | |
549 | return err; | |
550 | } | |
551 | ||
552 | static int rawv6_send_hdrinc(struct sock *sk, void *from, int length, | |
1ab1457c | 553 | struct flowi *fl, struct rt6_info *rt, |
1da177e4 LT |
554 | unsigned int flags) |
555 | { | |
3320da89 | 556 | struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 LT |
557 | struct ipv6hdr *iph; |
558 | struct sk_buff *skb; | |
559 | unsigned int hh_len; | |
560 | int err; | |
561 | ||
562 | if (length > rt->u.dst.dev->mtu) { | |
563 | ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu); | |
564 | return -EMSGSIZE; | |
565 | } | |
566 | if (flags&MSG_PROBE) | |
567 | goto out; | |
568 | ||
569 | hh_len = LL_RESERVED_SPACE(rt->u.dst.dev); | |
570 | ||
571 | skb = sock_alloc_send_skb(sk, length+hh_len+15, | |
572 | flags&MSG_DONTWAIT, &err); | |
573 | if (skb == NULL) | |
1ab1457c | 574 | goto error; |
1da177e4 LT |
575 | skb_reserve(skb, hh_len); |
576 | ||
577 | skb->priority = sk->sk_priority; | |
578 | skb->dst = dst_clone(&rt->u.dst); | |
579 | ||
1ced98e8 ACM |
580 | skb_put(skb, length); |
581 | skb_reset_network_header(skb); | |
0660e03f | 582 | iph = ipv6_hdr(skb); |
1da177e4 LT |
583 | |
584 | skb->ip_summed = CHECKSUM_NONE; | |
585 | ||
586 | skb->h.raw = skb->nh.raw; | |
587 | err = memcpy_fromiovecend((void *)iph, from, 0, length); | |
588 | if (err) | |
589 | goto error_fault; | |
590 | ||
a11d206d | 591 | IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS); |
1da177e4 LT |
592 | err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, rt->u.dst.dev, |
593 | dst_output); | |
594 | if (err > 0) | |
3320da89 | 595 | err = np->recverr ? net_xmit_errno(err) : 0; |
1da177e4 LT |
596 | if (err) |
597 | goto error; | |
598 | out: | |
599 | return 0; | |
600 | ||
601 | error_fault: | |
602 | err = -EFAULT; | |
603 | kfree_skb(skb); | |
604 | error: | |
a11d206d | 605 | IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); |
1ab1457c | 606 | return err; |
1da177e4 LT |
607 | } |
608 | ||
a27b58fe | 609 | static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) |
1da177e4 LT |
610 | { |
611 | struct iovec *iov; | |
612 | u8 __user *type = NULL; | |
613 | u8 __user *code = NULL; | |
6e8f4d48 MN |
614 | #ifdef CONFIG_IPV6_MIP6 |
615 | u8 len = 0; | |
616 | #endif | |
1da177e4 LT |
617 | int probed = 0; |
618 | int i; | |
619 | ||
620 | if (!msg->msg_iov) | |
a27b58fe | 621 | return 0; |
1da177e4 LT |
622 | |
623 | for (i = 0; i < msg->msg_iovlen; i++) { | |
624 | iov = &msg->msg_iov[i]; | |
625 | if (!iov) | |
626 | continue; | |
627 | ||
628 | switch (fl->proto) { | |
629 | case IPPROTO_ICMPV6: | |
630 | /* check if one-byte field is readable or not. */ | |
631 | if (iov->iov_base && iov->iov_len < 1) | |
632 | break; | |
633 | ||
634 | if (!type) { | |
635 | type = iov->iov_base; | |
636 | /* check if code field is readable or not. */ | |
637 | if (iov->iov_len > 1) | |
638 | code = type + 1; | |
639 | } else if (!code) | |
640 | code = iov->iov_base; | |
641 | ||
642 | if (type && code) { | |
a27b58fe HC |
643 | if (get_user(fl->fl_icmp_type, type) || |
644 | get_user(fl->fl_icmp_code, code)) | |
645 | return -EFAULT; | |
1da177e4 LT |
646 | probed = 1; |
647 | } | |
648 | break; | |
6e8f4d48 MN |
649 | #ifdef CONFIG_IPV6_MIP6 |
650 | case IPPROTO_MH: | |
651 | if (iov->iov_base && iov->iov_len < 1) | |
652 | break; | |
653 | /* check if type field is readable or not. */ | |
654 | if (iov->iov_len > 2 - len) { | |
655 | u8 __user *p = iov->iov_base; | |
a27b58fe HC |
656 | if (get_user(fl->fl_mh_type, &p[2 - len])) |
657 | return -EFAULT; | |
6e8f4d48 MN |
658 | probed = 1; |
659 | } else | |
660 | len += iov->iov_len; | |
661 | ||
662 | break; | |
663 | #endif | |
1da177e4 LT |
664 | default: |
665 | probed = 1; | |
666 | break; | |
667 | } | |
668 | if (probed) | |
669 | break; | |
670 | } | |
a27b58fe | 671 | return 0; |
1da177e4 LT |
672 | } |
673 | ||
674 | static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, | |
675 | struct msghdr *msg, size_t len) | |
676 | { | |
677 | struct ipv6_txoptions opt_space; | |
678 | struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
679 | struct in6_addr *daddr, *final_p = NULL, final; | |
680 | struct inet_sock *inet = inet_sk(sk); | |
681 | struct ipv6_pinfo *np = inet6_sk(sk); | |
682 | struct raw6_sock *rp = raw6_sk(sk); | |
683 | struct ipv6_txoptions *opt = NULL; | |
684 | struct ip6_flowlabel *flowlabel = NULL; | |
685 | struct dst_entry *dst = NULL; | |
686 | struct flowi fl; | |
687 | int addr_len = msg->msg_namelen; | |
688 | int hlimit = -1; | |
41a1f8ea | 689 | int tclass = -1; |
1da177e4 LT |
690 | u16 proto; |
691 | int err; | |
692 | ||
693 | /* Rough check on arithmetic overflow, | |
b59e139b | 694 | better check is made in ip6_append_data(). |
1da177e4 | 695 | */ |
b59e139b | 696 | if (len > INT_MAX) |
1da177e4 LT |
697 | return -EMSGSIZE; |
698 | ||
699 | /* Mirror BSD error message compatibility */ | |
1ab1457c | 700 | if (msg->msg_flags & MSG_OOB) |
1da177e4 LT |
701 | return -EOPNOTSUPP; |
702 | ||
703 | /* | |
1ab1457c | 704 | * Get and verify the address. |
1da177e4 LT |
705 | */ |
706 | memset(&fl, 0, sizeof(fl)); | |
707 | ||
708 | if (sin6) { | |
1ab1457c | 709 | if (addr_len < SIN6_LEN_RFC2133) |
1da177e4 LT |
710 | return -EINVAL; |
711 | ||
1ab1457c | 712 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) |
1da177e4 LT |
713 | return(-EAFNOSUPPORT); |
714 | ||
715 | /* port is the proto value [0..255] carried in nexthdr */ | |
716 | proto = ntohs(sin6->sin6_port); | |
717 | ||
718 | if (!proto) | |
719 | proto = inet->num; | |
720 | else if (proto != inet->num) | |
721 | return(-EINVAL); | |
722 | ||
723 | if (proto > 255) | |
724 | return(-EINVAL); | |
725 | ||
726 | daddr = &sin6->sin6_addr; | |
727 | if (np->sndflow) { | |
728 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; | |
729 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
730 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
731 | if (flowlabel == NULL) | |
732 | return -EINVAL; | |
733 | daddr = &flowlabel->dst; | |
734 | } | |
735 | } | |
736 | ||
737 | /* | |
738 | * Otherwise it will be difficult to maintain | |
739 | * sk->sk_dst_cache. | |
740 | */ | |
741 | if (sk->sk_state == TCP_ESTABLISHED && | |
742 | ipv6_addr_equal(daddr, &np->daddr)) | |
743 | daddr = &np->daddr; | |
744 | ||
745 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
746 | sin6->sin6_scope_id && | |
747 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
748 | fl.oif = sin6->sin6_scope_id; | |
749 | } else { | |
1ab1457c | 750 | if (sk->sk_state != TCP_ESTABLISHED) |
1da177e4 | 751 | return -EDESTADDRREQ; |
1ab1457c | 752 | |
1da177e4 LT |
753 | proto = inet->num; |
754 | daddr = &np->daddr; | |
755 | fl.fl6_flowlabel = np->flow_label; | |
756 | } | |
757 | ||
758 | if (ipv6_addr_any(daddr)) { | |
1ab1457c YH |
759 | /* |
760 | * unspecified destination address | |
1da177e4 LT |
761 | * treated as error... is this correct ? |
762 | */ | |
763 | fl6_sock_release(flowlabel); | |
764 | return(-EINVAL); | |
765 | } | |
766 | ||
767 | if (fl.oif == 0) | |
768 | fl.oif = sk->sk_bound_dev_if; | |
769 | ||
770 | if (msg->msg_controllen) { | |
771 | opt = &opt_space; | |
772 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
773 | opt->tot_len = sizeof(struct ipv6_txoptions); | |
774 | ||
41a1f8ea | 775 | err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
776 | if (err < 0) { |
777 | fl6_sock_release(flowlabel); | |
778 | return err; | |
779 | } | |
780 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { | |
781 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
782 | if (flowlabel == NULL) | |
783 | return -EINVAL; | |
784 | } | |
785 | if (!(opt->opt_nflen|opt->opt_flen)) | |
786 | opt = NULL; | |
787 | } | |
788 | if (opt == NULL) | |
789 | opt = np->opt; | |
df9890c3 YH |
790 | if (flowlabel) |
791 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
792 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 LT |
793 | |
794 | fl.proto = proto; | |
a27b58fe HC |
795 | err = rawv6_probe_proto_opt(&fl, msg); |
796 | if (err) | |
797 | goto out; | |
1ab1457c | 798 | |
1da177e4 LT |
799 | ipv6_addr_copy(&fl.fl6_dst, daddr); |
800 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) | |
801 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
802 | ||
803 | /* merge ip6_build_xmit from ip6_output */ | |
804 | if (opt && opt->srcrt) { | |
805 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
806 | ipv6_addr_copy(&final, &fl.fl6_dst); | |
807 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
808 | final_p = &final; | |
809 | } | |
810 | ||
811 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) | |
812 | fl.oif = np->mcast_oif; | |
beb8d13b | 813 | security_sk_classify_flow(sk, &fl); |
1da177e4 LT |
814 | |
815 | err = ip6_dst_lookup(sk, &dst, &fl); | |
816 | if (err) | |
817 | goto out; | |
818 | if (final_p) | |
819 | ipv6_addr_copy(&fl.fl6_dst, final_p); | |
820 | ||
8eb9086f | 821 | if ((err = xfrm_lookup(&dst, &fl, sk, 1)) < 0) |
1da177e4 | 822 | goto out; |
1da177e4 LT |
823 | |
824 | if (hlimit < 0) { | |
825 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) | |
826 | hlimit = np->mcast_hops; | |
827 | else | |
828 | hlimit = np->hop_limit; | |
829 | if (hlimit < 0) | |
830 | hlimit = dst_metric(dst, RTAX_HOPLIMIT); | |
831 | if (hlimit < 0) | |
832 | hlimit = ipv6_get_hoplimit(dst->dev); | |
833 | } | |
834 | ||
41a1f8ea | 835 | if (tclass < 0) { |
e012d51c | 836 | tclass = np->tclass; |
41a1f8ea YH |
837 | if (tclass < 0) |
838 | tclass = 0; | |
839 | } | |
840 | ||
1da177e4 LT |
841 | if (msg->msg_flags&MSG_CONFIRM) |
842 | goto do_confirm; | |
843 | ||
844 | back_from_confirm: | |
845 | if (inet->hdrincl) { | |
846 | err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags); | |
847 | } else { | |
848 | lock_sock(sk); | |
41a1f8ea YH |
849 | err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, |
850 | len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst, | |
851 | msg->msg_flags); | |
1da177e4 LT |
852 | |
853 | if (err) | |
854 | ip6_flush_pending_frames(sk); | |
855 | else if (!(msg->msg_flags & MSG_MORE)) | |
357b40a1 | 856 | err = rawv6_push_pending_frames(sk, &fl, rp); |
1da177e4 LT |
857 | } |
858 | done: | |
6d3e85ec | 859 | dst_release(dst); |
4e33fa14 MN |
860 | if (!inet->hdrincl) |
861 | release_sock(sk); | |
1ab1457c | 862 | out: |
1da177e4 LT |
863 | fl6_sock_release(flowlabel); |
864 | return err<0?err:len; | |
865 | do_confirm: | |
866 | dst_confirm(dst); | |
867 | if (!(msg->msg_flags & MSG_PROBE) || len) | |
868 | goto back_from_confirm; | |
869 | err = 0; | |
870 | goto done; | |
871 | } | |
872 | ||
1ab1457c | 873 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
874 | char __user *optval, int optlen) |
875 | { | |
876 | switch (optname) { | |
877 | case ICMPV6_FILTER: | |
878 | if (optlen > sizeof(struct icmp6_filter)) | |
879 | optlen = sizeof(struct icmp6_filter); | |
880 | if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) | |
881 | return -EFAULT; | |
882 | return 0; | |
883 | default: | |
884 | return -ENOPROTOOPT; | |
885 | }; | |
886 | ||
887 | return 0; | |
888 | } | |
889 | ||
1ab1457c | 890 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
891 | char __user *optval, int __user *optlen) |
892 | { | |
893 | int len; | |
894 | ||
895 | switch (optname) { | |
896 | case ICMPV6_FILTER: | |
897 | if (get_user(len, optlen)) | |
898 | return -EFAULT; | |
899 | if (len < 0) | |
900 | return -EINVAL; | |
901 | if (len > sizeof(struct icmp6_filter)) | |
902 | len = sizeof(struct icmp6_filter); | |
903 | if (put_user(len, optlen)) | |
904 | return -EFAULT; | |
905 | if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) | |
906 | return -EFAULT; | |
907 | return 0; | |
908 | default: | |
909 | return -ENOPROTOOPT; | |
910 | }; | |
911 | ||
912 | return 0; | |
913 | } | |
914 | ||
915 | ||
3fdadf7d | 916 | static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
917 | char __user *optval, int optlen) |
918 | { | |
919 | struct raw6_sock *rp = raw6_sk(sk); | |
920 | int val; | |
921 | ||
1ab1457c | 922 | if (get_user(val, (int __user *)optval)) |
1da177e4 LT |
923 | return -EFAULT; |
924 | ||
925 | switch (optname) { | |
926 | case IPV6_CHECKSUM: | |
927 | /* You may get strange result with a positive odd offset; | |
928 | RFC2292bis agrees with me. */ | |
929 | if (val > 0 && (val&1)) | |
930 | return(-EINVAL); | |
931 | if (val < 0) { | |
932 | rp->checksum = 0; | |
933 | } else { | |
934 | rp->checksum = 1; | |
935 | rp->offset = val; | |
936 | } | |
937 | ||
938 | return 0; | |
939 | break; | |
940 | ||
941 | default: | |
942 | return(-ENOPROTOOPT); | |
943 | } | |
944 | } | |
945 | ||
3fdadf7d DM |
946 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, |
947 | char __user *optval, int optlen) | |
1da177e4 | 948 | { |
1da177e4 LT |
949 | switch(level) { |
950 | case SOL_RAW: | |
951 | break; | |
952 | ||
953 | case SOL_ICMPV6: | |
954 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
955 | return -EOPNOTSUPP; | |
3fdadf7d | 956 | return rawv6_seticmpfilter(sk, level, optname, optval, |
1da177e4 LT |
957 | optlen); |
958 | case SOL_IPV6: | |
959 | if (optname == IPV6_CHECKSUM) | |
960 | break; | |
961 | default: | |
3fdadf7d | 962 | return ipv6_setsockopt(sk, level, optname, optval, |
1da177e4 LT |
963 | optlen); |
964 | }; | |
3fdadf7d DM |
965 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
966 | } | |
967 | ||
968 | #ifdef CONFIG_COMPAT | |
969 | static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 970 | char __user *optval, int optlen) |
3fdadf7d | 971 | { |
543d9cfe ACM |
972 | switch (level) { |
973 | case SOL_RAW: | |
974 | break; | |
975 | case SOL_ICMPV6: | |
976 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
977 | return -EOPNOTSUPP; | |
978 | return rawv6_seticmpfilter(sk, level, optname, optval, optlen); | |
979 | case SOL_IPV6: | |
980 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 981 | break; |
543d9cfe ACM |
982 | default: |
983 | return compat_ipv6_setsockopt(sk, level, optname, | |
984 | optval, optlen); | |
3fdadf7d DM |
985 | }; |
986 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); | |
987 | } | |
988 | #endif | |
989 | ||
990 | static int do_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
991 | char __user *optval, int __user *optlen) | |
992 | { | |
993 | struct raw6_sock *rp = raw6_sk(sk); | |
994 | int val, len; | |
1da177e4 LT |
995 | |
996 | if (get_user(len,optlen)) | |
997 | return -EFAULT; | |
998 | ||
999 | switch (optname) { | |
1000 | case IPV6_CHECKSUM: | |
1001 | if (rp->checksum == 0) | |
1002 | val = -1; | |
1003 | else | |
1004 | val = rp->offset; | |
1005 | break; | |
1006 | ||
1007 | default: | |
1008 | return -ENOPROTOOPT; | |
1009 | } | |
1010 | ||
1011 | len = min_t(unsigned int, sizeof(int), len); | |
1012 | ||
1013 | if (put_user(len, optlen)) | |
1014 | return -EFAULT; | |
1015 | if (copy_to_user(optval,&val,len)) | |
1016 | return -EFAULT; | |
1017 | return 0; | |
1018 | } | |
1019 | ||
3fdadf7d DM |
1020 | static int rawv6_getsockopt(struct sock *sk, int level, int optname, |
1021 | char __user *optval, int __user *optlen) | |
1022 | { | |
1023 | switch(level) { | |
1024 | case SOL_RAW: | |
1025 | break; | |
1026 | ||
1027 | case SOL_ICMPV6: | |
1028 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1029 | return -EOPNOTSUPP; | |
1030 | return rawv6_geticmpfilter(sk, level, optname, optval, | |
1031 | optlen); | |
1032 | case SOL_IPV6: | |
1033 | if (optname == IPV6_CHECKSUM) | |
1034 | break; | |
1035 | default: | |
1036 | return ipv6_getsockopt(sk, level, optname, optval, | |
1037 | optlen); | |
1038 | }; | |
1039 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); | |
1040 | } | |
1041 | ||
1042 | #ifdef CONFIG_COMPAT | |
1043 | static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1044 | char __user *optval, int __user *optlen) |
3fdadf7d | 1045 | { |
543d9cfe ACM |
1046 | switch (level) { |
1047 | case SOL_RAW: | |
1048 | break; | |
1049 | case SOL_ICMPV6: | |
1050 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1051 | return -EOPNOTSUPP; | |
1052 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); | |
1053 | case SOL_IPV6: | |
1054 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1055 | break; |
543d9cfe ACM |
1056 | default: |
1057 | return compat_ipv6_getsockopt(sk, level, optname, | |
1058 | optval, optlen); | |
3fdadf7d DM |
1059 | }; |
1060 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); | |
1061 | } | |
1062 | #endif | |
1063 | ||
1da177e4 LT |
1064 | static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) |
1065 | { | |
1066 | switch(cmd) { | |
1067 | case SIOCOUTQ: | |
1068 | { | |
1069 | int amount = atomic_read(&sk->sk_wmem_alloc); | |
1070 | return put_user(amount, (int __user *)arg); | |
1071 | } | |
1072 | case SIOCINQ: | |
1073 | { | |
1074 | struct sk_buff *skb; | |
1075 | int amount = 0; | |
1076 | ||
e0f9f858 | 1077 | spin_lock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1078 | skb = skb_peek(&sk->sk_receive_queue); |
1079 | if (skb != NULL) | |
1080 | amount = skb->tail - skb->h.raw; | |
e0f9f858 | 1081 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1082 | return put_user(amount, (int __user *)arg); |
1083 | } | |
1084 | ||
1085 | default: | |
1086 | return -ENOIOCTLCMD; | |
1087 | } | |
1088 | } | |
1089 | ||
1090 | static void rawv6_close(struct sock *sk, long timeout) | |
1091 | { | |
1092 | if (inet_sk(sk)->num == IPPROTO_RAW) | |
1093 | ip6_ra_control(sk, -1, NULL); | |
1094 | ||
1095 | sk_common_release(sk); | |
1096 | } | |
1097 | ||
1098 | static int rawv6_init_sk(struct sock *sk) | |
1099 | { | |
f48d5ff1 MN |
1100 | struct raw6_sock *rp = raw6_sk(sk); |
1101 | ||
1102 | switch (inet_sk(sk)->num) { | |
1103 | case IPPROTO_ICMPV6: | |
1da177e4 LT |
1104 | rp->checksum = 1; |
1105 | rp->offset = 2; | |
f48d5ff1 MN |
1106 | break; |
1107 | case IPPROTO_MH: | |
1108 | rp->checksum = 1; | |
1109 | rp->offset = 4; | |
1110 | break; | |
1111 | default: | |
1112 | break; | |
1da177e4 LT |
1113 | } |
1114 | return(0); | |
1115 | } | |
1116 | ||
1117 | struct proto rawv6_prot = { | |
543d9cfe ACM |
1118 | .name = "RAWv6", |
1119 | .owner = THIS_MODULE, | |
1120 | .close = rawv6_close, | |
1121 | .connect = ip6_datagram_connect, | |
1122 | .disconnect = udp_disconnect, | |
1123 | .ioctl = rawv6_ioctl, | |
1124 | .init = rawv6_init_sk, | |
1125 | .destroy = inet6_destroy_sock, | |
1126 | .setsockopt = rawv6_setsockopt, | |
1127 | .getsockopt = rawv6_getsockopt, | |
1128 | .sendmsg = rawv6_sendmsg, | |
1129 | .recvmsg = rawv6_recvmsg, | |
1130 | .bind = rawv6_bind, | |
1131 | .backlog_rcv = rawv6_rcv_skb, | |
1132 | .hash = raw_v6_hash, | |
1133 | .unhash = raw_v6_unhash, | |
1134 | .obj_size = sizeof(struct raw6_sock), | |
3fdadf7d | 1135 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1136 | .compat_setsockopt = compat_rawv6_setsockopt, |
1137 | .compat_getsockopt = compat_rawv6_getsockopt, | |
3fdadf7d | 1138 | #endif |
1da177e4 LT |
1139 | }; |
1140 | ||
1141 | #ifdef CONFIG_PROC_FS | |
1142 | struct raw6_iter_state { | |
1143 | int bucket; | |
1144 | }; | |
1145 | ||
1146 | #define raw6_seq_private(seq) ((struct raw6_iter_state *)(seq)->private) | |
1147 | ||
1148 | static struct sock *raw6_get_first(struct seq_file *seq) | |
1149 | { | |
1150 | struct sock *sk; | |
1151 | struct hlist_node *node; | |
1152 | struct raw6_iter_state* state = raw6_seq_private(seq); | |
1153 | ||
1154 | for (state->bucket = 0; state->bucket < RAWV6_HTABLE_SIZE; ++state->bucket) | |
1155 | sk_for_each(sk, node, &raw_v6_htable[state->bucket]) | |
1156 | if (sk->sk_family == PF_INET6) | |
1157 | goto out; | |
1158 | sk = NULL; | |
1159 | out: | |
1160 | return sk; | |
1161 | } | |
1162 | ||
1163 | static struct sock *raw6_get_next(struct seq_file *seq, struct sock *sk) | |
1164 | { | |
1165 | struct raw6_iter_state* state = raw6_seq_private(seq); | |
1166 | ||
1167 | do { | |
1168 | sk = sk_next(sk); | |
1169 | try_again: | |
1170 | ; | |
1171 | } while (sk && sk->sk_family != PF_INET6); | |
1172 | ||
1173 | if (!sk && ++state->bucket < RAWV6_HTABLE_SIZE) { | |
1174 | sk = sk_head(&raw_v6_htable[state->bucket]); | |
1175 | goto try_again; | |
1176 | } | |
1177 | return sk; | |
1178 | } | |
1179 | ||
1180 | static struct sock *raw6_get_idx(struct seq_file *seq, loff_t pos) | |
1181 | { | |
1182 | struct sock *sk = raw6_get_first(seq); | |
1183 | if (sk) | |
1184 | while (pos && (sk = raw6_get_next(seq, sk)) != NULL) | |
1185 | --pos; | |
1186 | return pos ? NULL : sk; | |
1187 | } | |
1188 | ||
1189 | static void *raw6_seq_start(struct seq_file *seq, loff_t *pos) | |
1190 | { | |
1191 | read_lock(&raw_v6_lock); | |
1192 | return *pos ? raw6_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | |
1193 | } | |
1194 | ||
1195 | static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1196 | { | |
1197 | struct sock *sk; | |
1198 | ||
1199 | if (v == SEQ_START_TOKEN) | |
1200 | sk = raw6_get_first(seq); | |
1201 | else | |
1202 | sk = raw6_get_next(seq, v); | |
1203 | ++*pos; | |
1204 | return sk; | |
1205 | } | |
1206 | ||
1207 | static void raw6_seq_stop(struct seq_file *seq, void *v) | |
1208 | { | |
1209 | read_unlock(&raw_v6_lock); | |
1210 | } | |
1211 | ||
1212 | static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) | |
1213 | { | |
1214 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1215 | struct in6_addr *dest, *src; | |
1216 | __u16 destp, srcp; | |
1217 | ||
1218 | dest = &np->daddr; | |
1219 | src = &np->rcv_saddr; | |
1220 | destp = 0; | |
1221 | srcp = inet_sk(sp)->num; | |
1222 | seq_printf(seq, | |
1223 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
1224 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n", | |
1225 | i, | |
1226 | src->s6_addr32[0], src->s6_addr32[1], | |
1227 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1228 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1229 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1230 | sp->sk_state, |
1da177e4 LT |
1231 | atomic_read(&sp->sk_wmem_alloc), |
1232 | atomic_read(&sp->sk_rmem_alloc), | |
1233 | 0, 0L, 0, | |
1234 | sock_i_uid(sp), 0, | |
1235 | sock_i_ino(sp), | |
1236 | atomic_read(&sp->sk_refcnt), sp); | |
1237 | } | |
1238 | ||
1239 | static int raw6_seq_show(struct seq_file *seq, void *v) | |
1240 | { | |
1241 | if (v == SEQ_START_TOKEN) | |
1242 | seq_printf(seq, | |
1243 | " sl " | |
1244 | "local_address " | |
1245 | "remote_address " | |
1246 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
1247 | " uid timeout inode\n"); | |
1248 | else | |
1249 | raw6_sock_seq_show(seq, v, raw6_seq_private(seq)->bucket); | |
1250 | return 0; | |
1251 | } | |
1252 | ||
1253 | static struct seq_operations raw6_seq_ops = { | |
1254 | .start = raw6_seq_start, | |
1255 | .next = raw6_seq_next, | |
1256 | .stop = raw6_seq_stop, | |
1257 | .show = raw6_seq_show, | |
1258 | }; | |
1259 | ||
1260 | static int raw6_seq_open(struct inode *inode, struct file *file) | |
1261 | { | |
1262 | struct seq_file *seq; | |
1263 | int rc = -ENOMEM; | |
0c600eda | 1264 | struct raw6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL); |
1da177e4 LT |
1265 | if (!s) |
1266 | goto out; | |
1267 | rc = seq_open(file, &raw6_seq_ops); | |
1268 | if (rc) | |
1269 | goto out_kfree; | |
1270 | seq = file->private_data; | |
1271 | seq->private = s; | |
1da177e4 LT |
1272 | out: |
1273 | return rc; | |
1274 | out_kfree: | |
1275 | kfree(s); | |
1276 | goto out; | |
1277 | } | |
1278 | ||
9a32144e | 1279 | static const struct file_operations raw6_seq_fops = { |
1da177e4 LT |
1280 | .owner = THIS_MODULE, |
1281 | .open = raw6_seq_open, | |
1282 | .read = seq_read, | |
1283 | .llseek = seq_lseek, | |
1284 | .release = seq_release_private, | |
1285 | }; | |
1286 | ||
1287 | int __init raw6_proc_init(void) | |
1288 | { | |
1289 | if (!proc_net_fops_create("raw6", S_IRUGO, &raw6_seq_fops)) | |
1290 | return -ENOMEM; | |
1291 | return 0; | |
1292 | } | |
1293 | ||
1294 | void raw6_proc_exit(void) | |
1295 | { | |
1296 | proc_net_remove("raw6"); | |
1297 | } | |
1298 | #endif /* CONFIG_PROC_FS */ |