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> |
59fbb3a6 | 52 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
7be96f76 MN |
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 | ||
59fbb3a6 MN |
140 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
141 | static int (*mh_filter)(struct sock *sock, struct sk_buff *skb); | |
142 | ||
143 | int rawv6_mh_filter_register(int (*filter)(struct sock *sock, | |
144 | struct sk_buff *skb)) | |
145 | { | |
146 | rcu_assign_pointer(mh_filter, filter); | |
147 | return 0; | |
148 | } | |
149 | EXPORT_SYMBOL(rawv6_mh_filter_register); | |
150 | ||
151 | int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock, | |
152 | struct sk_buff *skb)) | |
153 | { | |
154 | rcu_assign_pointer(mh_filter, NULL); | |
155 | synchronize_rcu(); | |
156 | return 0; | |
157 | } | |
158 | EXPORT_SYMBOL(rawv6_mh_filter_unregister); | |
159 | ||
160 | #endif | |
161 | ||
1da177e4 LT |
162 | /* |
163 | * demultiplex raw sockets. | |
164 | * (should consider queueing the skb in the sock receive_queue | |
165 | * without calling rawv6.c) | |
166 | * | |
167 | * Caller owns SKB so we must make clones. | |
168 | */ | |
d13964f4 | 169 | int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) |
1da177e4 LT |
170 | { |
171 | struct in6_addr *saddr; | |
172 | struct in6_addr *daddr; | |
173 | struct sock *sk; | |
d13964f4 | 174 | int delivered = 0; |
1da177e4 LT |
175 | __u8 hash; |
176 | ||
0660e03f | 177 | saddr = &ipv6_hdr(skb)->saddr; |
1da177e4 LT |
178 | daddr = saddr + 1; |
179 | ||
180 | hash = nexthdr & (MAX_INET_PROTOS - 1); | |
181 | ||
182 | read_lock(&raw_v6_lock); | |
183 | sk = sk_head(&raw_v6_htable[hash]); | |
184 | ||
185 | /* | |
186 | * The first socket found will be delivered after | |
187 | * delivery to transport protocols. | |
188 | */ | |
189 | ||
190 | if (sk == NULL) | |
191 | goto out; | |
192 | ||
2dac4b96 | 193 | sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr, IP6CB(skb)->iif); |
1da177e4 LT |
194 | |
195 | while (sk) { | |
7be96f76 MN |
196 | int filtered; |
197 | ||
d13964f4 | 198 | delivered = 1; |
7be96f76 MN |
199 | switch (nexthdr) { |
200 | case IPPROTO_ICMPV6: | |
201 | filtered = icmpv6_filter(sk, skb); | |
202 | break; | |
59fbb3a6 MN |
203 | |
204 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) | |
7be96f76 | 205 | case IPPROTO_MH: |
59fbb3a6 | 206 | { |
7be96f76 MN |
207 | /* XXX: To validate MH only once for each packet, |
208 | * this is placed here. It should be after checking | |
209 | * xfrm policy, however it doesn't. The checking xfrm | |
210 | * policy is placed in rawv6_rcv() because it is | |
211 | * required for each socket. | |
212 | */ | |
59fbb3a6 MN |
213 | int (*filter)(struct sock *sock, struct sk_buff *skb); |
214 | ||
215 | filter = rcu_dereference(mh_filter); | |
216 | filtered = filter ? filter(sk, skb) : 0; | |
7be96f76 | 217 | break; |
59fbb3a6 | 218 | } |
7be96f76 MN |
219 | #endif |
220 | default: | |
221 | filtered = 0; | |
222 | break; | |
223 | } | |
224 | ||
225 | if (filtered < 0) | |
226 | break; | |
227 | if (filtered == 0) { | |
1da177e4 LT |
228 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); |
229 | ||
230 | /* Not releasing hash table! */ | |
9fb9cbb1 YK |
231 | if (clone) { |
232 | nf_reset(clone); | |
1da177e4 | 233 | rawv6_rcv(sk, clone); |
9fb9cbb1 | 234 | } |
1da177e4 | 235 | } |
0bd1b59b | 236 | sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr, |
2dac4b96 | 237 | IP6CB(skb)->iif); |
1da177e4 LT |
238 | } |
239 | out: | |
240 | read_unlock(&raw_v6_lock); | |
d13964f4 | 241 | return delivered; |
1da177e4 LT |
242 | } |
243 | ||
244 | /* This cleans up af_inet6 a bit. -DaveM */ | |
245 | static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
246 | { | |
247 | struct inet_sock *inet = inet_sk(sk); | |
248 | struct ipv6_pinfo *np = inet6_sk(sk); | |
249 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; | |
e69a4adc | 250 | __be32 v4addr = 0; |
1da177e4 LT |
251 | int addr_type; |
252 | int err; | |
253 | ||
254 | if (addr_len < SIN6_LEN_RFC2133) | |
255 | return -EINVAL; | |
256 | addr_type = ipv6_addr_type(&addr->sin6_addr); | |
257 | ||
258 | /* Raw sockets are IPv6 only */ | |
259 | if (addr_type == IPV6_ADDR_MAPPED) | |
260 | return(-EADDRNOTAVAIL); | |
261 | ||
262 | lock_sock(sk); | |
263 | ||
264 | err = -EINVAL; | |
265 | if (sk->sk_state != TCP_CLOSE) | |
266 | goto out; | |
267 | ||
268 | /* Check if the address belongs to the host. */ | |
269 | if (addr_type != IPV6_ADDR_ANY) { | |
270 | struct net_device *dev = NULL; | |
271 | ||
272 | if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
273 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
274 | addr->sin6_scope_id) { | |
275 | /* Override any existing binding, if another | |
276 | * one is supplied by user. | |
277 | */ | |
278 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
279 | } | |
1ab1457c | 280 | |
1da177e4 LT |
281 | /* Binding to link-local address requires an interface */ |
282 | if (!sk->sk_bound_dev_if) | |
283 | goto out; | |
284 | ||
285 | dev = dev_get_by_index(sk->sk_bound_dev_if); | |
286 | if (!dev) { | |
287 | err = -ENODEV; | |
288 | goto out; | |
289 | } | |
290 | } | |
1ab1457c | 291 | |
1da177e4 LT |
292 | /* ipv4 addr of the socket is invalid. Only the |
293 | * unspecified and mapped address have a v4 equivalent. | |
294 | */ | |
295 | v4addr = LOOPBACK4_IPV6; | |
296 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
297 | err = -EADDRNOTAVAIL; | |
298 | if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) { | |
299 | if (dev) | |
300 | dev_put(dev); | |
301 | goto out; | |
302 | } | |
303 | } | |
304 | if (dev) | |
305 | dev_put(dev); | |
306 | } | |
307 | ||
308 | inet->rcv_saddr = inet->saddr = v4addr; | |
309 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); | |
310 | if (!(addr_type & IPV6_ADDR_MULTICAST)) | |
311 | ipv6_addr_copy(&np->saddr, &addr->sin6_addr); | |
312 | err = 0; | |
313 | out: | |
314 | release_sock(sk); | |
315 | return err; | |
316 | } | |
317 | ||
318 | void rawv6_err(struct sock *sk, struct sk_buff *skb, | |
319 | struct inet6_skb_parm *opt, | |
04ce6909 | 320 | int type, int code, int offset, __be32 info) |
1da177e4 LT |
321 | { |
322 | struct inet_sock *inet = inet_sk(sk); | |
323 | struct ipv6_pinfo *np = inet6_sk(sk); | |
324 | int err; | |
325 | int harderr; | |
326 | ||
327 | /* Report error on raw socket, if: | |
328 | 1. User requested recverr. | |
329 | 2. Socket is connected (otherwise the error indication | |
330 | is useless without recverr and error is hard. | |
331 | */ | |
332 | if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) | |
333 | return; | |
334 | ||
335 | harderr = icmpv6_err_convert(type, code, &err); | |
336 | if (type == ICMPV6_PKT_TOOBIG) | |
337 | harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); | |
338 | ||
339 | if (np->recverr) { | |
340 | u8 *payload = skb->data; | |
341 | if (!inet->hdrincl) | |
342 | payload += offset; | |
343 | ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); | |
344 | } | |
345 | ||
346 | if (np->recverr || harderr) { | |
347 | sk->sk_err = err; | |
348 | sk->sk_error_report(sk); | |
349 | } | |
350 | } | |
351 | ||
352 | static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb) | |
353 | { | |
1ab1457c | 354 | if ((raw6_sk(sk)->checksum || sk->sk_filter) && |
fb286bb2 HX |
355 | skb_checksum_complete(skb)) { |
356 | /* FIXME: increment a raw6 drops counter here */ | |
357 | kfree_skb(skb); | |
358 | return 0; | |
1da177e4 LT |
359 | } |
360 | ||
361 | /* Charge it to the socket. */ | |
362 | if (sock_queue_rcv_skb(sk,skb)<0) { | |
363 | /* FIXME: increment a raw6 drops counter here */ | |
364 | kfree_skb(skb); | |
365 | return 0; | |
366 | } | |
367 | ||
368 | return 0; | |
369 | } | |
370 | ||
371 | /* | |
1ab1457c | 372 | * This is next to useless... |
1da177e4 | 373 | * if we demultiplex in network layer we don't need the extra call |
1ab1457c YH |
374 | * just to queue the skb... |
375 | * maybe we could have the network decide upon a hint if it | |
1da177e4 LT |
376 | * should call raw_rcv for demultiplexing |
377 | */ | |
378 | int rawv6_rcv(struct sock *sk, struct sk_buff *skb) | |
379 | { | |
380 | struct inet_sock *inet = inet_sk(sk); | |
381 | struct raw6_sock *rp = raw6_sk(sk); | |
382 | ||
1ab1457c YH |
383 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { |
384 | kfree_skb(skb); | |
385 | return NET_RX_DROP; | |
386 | } | |
1da177e4 LT |
387 | |
388 | if (!rp->checksum) | |
389 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
390 | ||
84fa7933 | 391 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
d56f90a7 | 392 | skb_postpull_rcsum(skb, skb_network_header(skb), |
cfe1fc77 | 393 | skb_network_header_len(skb)); |
0660e03f ACM |
394 | if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
395 | &ipv6_hdr(skb)->daddr, | |
fb286bb2 | 396 | skb->len, inet->num, skb->csum)) |
1da177e4 | 397 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1da177e4 | 398 | } |
60476372 | 399 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
400 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
401 | &ipv6_hdr(skb)->daddr, | |
402 | skb->len, | |
403 | inet->num, 0)); | |
1da177e4 LT |
404 | |
405 | if (inet->hdrincl) { | |
fb286bb2 | 406 | if (skb_checksum_complete(skb)) { |
1da177e4 LT |
407 | /* FIXME: increment a raw6 drops counter here */ |
408 | kfree_skb(skb); | |
409 | return 0; | |
410 | } | |
1da177e4 LT |
411 | } |
412 | ||
413 | rawv6_rcv_skb(sk, skb); | |
414 | return 0; | |
415 | } | |
416 | ||
417 | ||
418 | /* | |
419 | * This should be easy, if there is something there | |
420 | * we return it, otherwise we block. | |
421 | */ | |
422 | ||
423 | static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk, | |
424 | struct msghdr *msg, size_t len, | |
425 | int noblock, int flags, int *addr_len) | |
426 | { | |
427 | struct ipv6_pinfo *np = inet6_sk(sk); | |
428 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name; | |
429 | struct sk_buff *skb; | |
430 | size_t copied; | |
431 | int err; | |
432 | ||
433 | if (flags & MSG_OOB) | |
434 | return -EOPNOTSUPP; | |
1ab1457c YH |
435 | |
436 | if (addr_len) | |
1da177e4 LT |
437 | *addr_len=sizeof(*sin6); |
438 | ||
439 | if (flags & MSG_ERRQUEUE) | |
440 | return ipv6_recv_error(sk, msg, len); | |
441 | ||
442 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
443 | if (!skb) | |
444 | goto out; | |
445 | ||
446 | copied = skb->len; | |
1ab1457c YH |
447 | if (copied > len) { |
448 | copied = len; | |
449 | msg->msg_flags |= MSG_TRUNC; | |
450 | } | |
1da177e4 | 451 | |
60476372 | 452 | if (skb_csum_unnecessary(skb)) { |
1da177e4 LT |
453 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
454 | } else if (msg->msg_flags&MSG_TRUNC) { | |
fb286bb2 | 455 | if (__skb_checksum_complete(skb)) |
1da177e4 LT |
456 | goto csum_copy_err; |
457 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
458 | } else { | |
459 | err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov); | |
460 | if (err == -EINVAL) | |
461 | goto csum_copy_err; | |
462 | } | |
463 | if (err) | |
464 | goto out_free; | |
465 | ||
466 | /* Copy the address. */ | |
467 | if (sin6) { | |
468 | sin6->sin6_family = AF_INET6; | |
f59fc7f3 | 469 | sin6->sin6_port = 0; |
0660e03f | 470 | ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr); |
1da177e4 LT |
471 | sin6->sin6_flowinfo = 0; |
472 | sin6->sin6_scope_id = 0; | |
473 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
474 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
475 | } | |
476 | ||
477 | sock_recv_timestamp(msg, sk, skb); | |
478 | ||
479 | if (np->rxopt.all) | |
480 | datagram_recv_ctl(sk, msg, skb); | |
481 | ||
482 | err = copied; | |
483 | if (flags & MSG_TRUNC) | |
484 | err = skb->len; | |
485 | ||
486 | out_free: | |
487 | skb_free_datagram(sk, skb); | |
488 | out: | |
489 | return err; | |
490 | ||
491 | csum_copy_err: | |
3305b80c | 492 | skb_kill_datagram(sk, skb, flags); |
1da177e4 LT |
493 | |
494 | /* Error for blocking case is chosen to masquerade | |
495 | as some normal condition. | |
496 | */ | |
497 | err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; | |
498 | /* FIXME: increment a raw6 drops counter here */ | |
3305b80c | 499 | goto out; |
1da177e4 LT |
500 | } |
501 | ||
502 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl, | |
357b40a1 | 503 | struct raw6_sock *rp) |
1da177e4 LT |
504 | { |
505 | struct sk_buff *skb; | |
506 | int err = 0; | |
357b40a1 HX |
507 | int offset; |
508 | int len; | |
679a8738 | 509 | int total_len; |
868c86bc AV |
510 | __wsum tmp_csum; |
511 | __sum16 csum; | |
1da177e4 LT |
512 | |
513 | if (!rp->checksum) | |
514 | goto send; | |
515 | ||
516 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
517 | goto out; | |
518 | ||
357b40a1 | 519 | offset = rp->offset; |
d56f90a7 ACM |
520 | total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) - |
521 | skb->data); | |
679a8738 | 522 | if (offset >= total_len - 1) { |
1da177e4 | 523 | err = -EINVAL; |
357b40a1 | 524 | ip6_flush_pending_frames(sk); |
1da177e4 LT |
525 | goto out; |
526 | } | |
527 | ||
528 | /* should be check HW csum miyazawa */ | |
529 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
530 | /* | |
531 | * Only one fragment on the socket. | |
532 | */ | |
533 | tmp_csum = skb->csum; | |
534 | } else { | |
357b40a1 | 535 | struct sk_buff *csum_skb = NULL; |
1da177e4 LT |
536 | tmp_csum = 0; |
537 | ||
538 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
539 | tmp_csum = csum_add(tmp_csum, skb->csum); | |
357b40a1 HX |
540 | |
541 | if (csum_skb) | |
542 | continue; | |
543 | ||
ea2ae17d | 544 | len = skb->len - skb_transport_offset(skb); |
357b40a1 HX |
545 | if (offset >= len) { |
546 | offset -= len; | |
547 | continue; | |
548 | } | |
549 | ||
550 | csum_skb = skb; | |
1da177e4 | 551 | } |
357b40a1 HX |
552 | |
553 | skb = csum_skb; | |
1da177e4 LT |
554 | } |
555 | ||
ea2ae17d | 556 | offset += skb_transport_offset(skb); |
357b40a1 HX |
557 | if (skb_copy_bits(skb, offset, &csum, 2)) |
558 | BUG(); | |
559 | ||
1da177e4 | 560 | /* in case cksum was not initialized */ |
357b40a1 | 561 | if (unlikely(csum)) |
5f92a738 | 562 | tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); |
357b40a1 | 563 | |
868c86bc | 564 | csum = csum_ipv6_magic(&fl->fl6_src, |
357b40a1 | 565 | &fl->fl6_dst, |
679a8738 | 566 | total_len, fl->proto, tmp_csum); |
357b40a1 | 567 | |
f6ab0288 AV |
568 | if (csum == 0 && fl->proto == IPPROTO_UDP) |
569 | csum = CSUM_MANGLED_0; | |
1da177e4 | 570 | |
357b40a1 HX |
571 | if (skb_store_bits(skb, offset, &csum, 2)) |
572 | BUG(); | |
1da177e4 | 573 | |
1da177e4 LT |
574 | send: |
575 | err = ip6_push_pending_frames(sk); | |
576 | out: | |
577 | return err; | |
578 | } | |
579 | ||
580 | static int rawv6_send_hdrinc(struct sock *sk, void *from, int length, | |
1ab1457c | 581 | struct flowi *fl, struct rt6_info *rt, |
1da177e4 LT |
582 | unsigned int flags) |
583 | { | |
3320da89 | 584 | struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 LT |
585 | struct ipv6hdr *iph; |
586 | struct sk_buff *skb; | |
587 | unsigned int hh_len; | |
588 | int err; | |
589 | ||
590 | if (length > rt->u.dst.dev->mtu) { | |
591 | ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu); | |
592 | return -EMSGSIZE; | |
593 | } | |
594 | if (flags&MSG_PROBE) | |
595 | goto out; | |
596 | ||
597 | hh_len = LL_RESERVED_SPACE(rt->u.dst.dev); | |
598 | ||
599 | skb = sock_alloc_send_skb(sk, length+hh_len+15, | |
600 | flags&MSG_DONTWAIT, &err); | |
601 | if (skb == NULL) | |
1ab1457c | 602 | goto error; |
1da177e4 LT |
603 | skb_reserve(skb, hh_len); |
604 | ||
605 | skb->priority = sk->sk_priority; | |
606 | skb->dst = dst_clone(&rt->u.dst); | |
607 | ||
1ced98e8 ACM |
608 | skb_put(skb, length); |
609 | skb_reset_network_header(skb); | |
0660e03f | 610 | iph = ipv6_hdr(skb); |
1da177e4 LT |
611 | |
612 | skb->ip_summed = CHECKSUM_NONE; | |
613 | ||
b0e380b1 | 614 | skb->transport_header = skb->network_header; |
1da177e4 LT |
615 | err = memcpy_fromiovecend((void *)iph, from, 0, length); |
616 | if (err) | |
617 | goto error_fault; | |
618 | ||
a11d206d | 619 | IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS); |
1da177e4 LT |
620 | err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, rt->u.dst.dev, |
621 | dst_output); | |
622 | if (err > 0) | |
3320da89 | 623 | err = np->recverr ? net_xmit_errno(err) : 0; |
1da177e4 LT |
624 | if (err) |
625 | goto error; | |
626 | out: | |
627 | return 0; | |
628 | ||
629 | error_fault: | |
630 | err = -EFAULT; | |
631 | kfree_skb(skb); | |
632 | error: | |
a11d206d | 633 | IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); |
1ab1457c | 634 | return err; |
1da177e4 LT |
635 | } |
636 | ||
a27b58fe | 637 | static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) |
1da177e4 LT |
638 | { |
639 | struct iovec *iov; | |
640 | u8 __user *type = NULL; | |
641 | u8 __user *code = NULL; | |
6e8f4d48 | 642 | u8 len = 0; |
1da177e4 LT |
643 | int probed = 0; |
644 | int i; | |
645 | ||
646 | if (!msg->msg_iov) | |
a27b58fe | 647 | return 0; |
1da177e4 LT |
648 | |
649 | for (i = 0; i < msg->msg_iovlen; i++) { | |
650 | iov = &msg->msg_iov[i]; | |
651 | if (!iov) | |
652 | continue; | |
653 | ||
654 | switch (fl->proto) { | |
655 | case IPPROTO_ICMPV6: | |
656 | /* check if one-byte field is readable or not. */ | |
657 | if (iov->iov_base && iov->iov_len < 1) | |
658 | break; | |
659 | ||
660 | if (!type) { | |
661 | type = iov->iov_base; | |
662 | /* check if code field is readable or not. */ | |
663 | if (iov->iov_len > 1) | |
664 | code = type + 1; | |
665 | } else if (!code) | |
666 | code = iov->iov_base; | |
667 | ||
668 | if (type && code) { | |
a27b58fe HC |
669 | if (get_user(fl->fl_icmp_type, type) || |
670 | get_user(fl->fl_icmp_code, code)) | |
671 | return -EFAULT; | |
1da177e4 LT |
672 | probed = 1; |
673 | } | |
674 | break; | |
6e8f4d48 MN |
675 | case IPPROTO_MH: |
676 | if (iov->iov_base && iov->iov_len < 1) | |
677 | break; | |
678 | /* check if type field is readable or not. */ | |
679 | if (iov->iov_len > 2 - len) { | |
680 | u8 __user *p = iov->iov_base; | |
a27b58fe HC |
681 | if (get_user(fl->fl_mh_type, &p[2 - len])) |
682 | return -EFAULT; | |
6e8f4d48 MN |
683 | probed = 1; |
684 | } else | |
685 | len += iov->iov_len; | |
686 | ||
687 | break; | |
1da177e4 LT |
688 | default: |
689 | probed = 1; | |
690 | break; | |
691 | } | |
692 | if (probed) | |
693 | break; | |
694 | } | |
a27b58fe | 695 | return 0; |
1da177e4 LT |
696 | } |
697 | ||
698 | static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, | |
699 | struct msghdr *msg, size_t len) | |
700 | { | |
701 | struct ipv6_txoptions opt_space; | |
702 | struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
703 | struct in6_addr *daddr, *final_p = NULL, final; | |
704 | struct inet_sock *inet = inet_sk(sk); | |
705 | struct ipv6_pinfo *np = inet6_sk(sk); | |
706 | struct raw6_sock *rp = raw6_sk(sk); | |
707 | struct ipv6_txoptions *opt = NULL; | |
708 | struct ip6_flowlabel *flowlabel = NULL; | |
709 | struct dst_entry *dst = NULL; | |
710 | struct flowi fl; | |
711 | int addr_len = msg->msg_namelen; | |
712 | int hlimit = -1; | |
41a1f8ea | 713 | int tclass = -1; |
1da177e4 LT |
714 | u16 proto; |
715 | int err; | |
716 | ||
717 | /* Rough check on arithmetic overflow, | |
b59e139b | 718 | better check is made in ip6_append_data(). |
1da177e4 | 719 | */ |
b59e139b | 720 | if (len > INT_MAX) |
1da177e4 LT |
721 | return -EMSGSIZE; |
722 | ||
723 | /* Mirror BSD error message compatibility */ | |
1ab1457c | 724 | if (msg->msg_flags & MSG_OOB) |
1da177e4 LT |
725 | return -EOPNOTSUPP; |
726 | ||
727 | /* | |
1ab1457c | 728 | * Get and verify the address. |
1da177e4 LT |
729 | */ |
730 | memset(&fl, 0, sizeof(fl)); | |
731 | ||
732 | if (sin6) { | |
1ab1457c | 733 | if (addr_len < SIN6_LEN_RFC2133) |
1da177e4 LT |
734 | return -EINVAL; |
735 | ||
1ab1457c | 736 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) |
1da177e4 LT |
737 | return(-EAFNOSUPPORT); |
738 | ||
739 | /* port is the proto value [0..255] carried in nexthdr */ | |
740 | proto = ntohs(sin6->sin6_port); | |
741 | ||
742 | if (!proto) | |
743 | proto = inet->num; | |
744 | else if (proto != inet->num) | |
745 | return(-EINVAL); | |
746 | ||
747 | if (proto > 255) | |
748 | return(-EINVAL); | |
749 | ||
750 | daddr = &sin6->sin6_addr; | |
751 | if (np->sndflow) { | |
752 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; | |
753 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
754 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
755 | if (flowlabel == NULL) | |
756 | return -EINVAL; | |
757 | daddr = &flowlabel->dst; | |
758 | } | |
759 | } | |
760 | ||
761 | /* | |
762 | * Otherwise it will be difficult to maintain | |
763 | * sk->sk_dst_cache. | |
764 | */ | |
765 | if (sk->sk_state == TCP_ESTABLISHED && | |
766 | ipv6_addr_equal(daddr, &np->daddr)) | |
767 | daddr = &np->daddr; | |
768 | ||
769 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
770 | sin6->sin6_scope_id && | |
771 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
772 | fl.oif = sin6->sin6_scope_id; | |
773 | } else { | |
1ab1457c | 774 | if (sk->sk_state != TCP_ESTABLISHED) |
1da177e4 | 775 | return -EDESTADDRREQ; |
1ab1457c | 776 | |
1da177e4 LT |
777 | proto = inet->num; |
778 | daddr = &np->daddr; | |
779 | fl.fl6_flowlabel = np->flow_label; | |
780 | } | |
781 | ||
782 | if (ipv6_addr_any(daddr)) { | |
1ab1457c YH |
783 | /* |
784 | * unspecified destination address | |
1da177e4 LT |
785 | * treated as error... is this correct ? |
786 | */ | |
787 | fl6_sock_release(flowlabel); | |
788 | return(-EINVAL); | |
789 | } | |
790 | ||
791 | if (fl.oif == 0) | |
792 | fl.oif = sk->sk_bound_dev_if; | |
793 | ||
794 | if (msg->msg_controllen) { | |
795 | opt = &opt_space; | |
796 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
797 | opt->tot_len = sizeof(struct ipv6_txoptions); | |
798 | ||
41a1f8ea | 799 | err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
800 | if (err < 0) { |
801 | fl6_sock_release(flowlabel); | |
802 | return err; | |
803 | } | |
804 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { | |
805 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
806 | if (flowlabel == NULL) | |
807 | return -EINVAL; | |
808 | } | |
809 | if (!(opt->opt_nflen|opt->opt_flen)) | |
810 | opt = NULL; | |
811 | } | |
812 | if (opt == NULL) | |
813 | opt = np->opt; | |
df9890c3 YH |
814 | if (flowlabel) |
815 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
816 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 LT |
817 | |
818 | fl.proto = proto; | |
a27b58fe HC |
819 | err = rawv6_probe_proto_opt(&fl, msg); |
820 | if (err) | |
821 | goto out; | |
1ab1457c | 822 | |
1da177e4 LT |
823 | ipv6_addr_copy(&fl.fl6_dst, daddr); |
824 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) | |
825 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
826 | ||
827 | /* merge ip6_build_xmit from ip6_output */ | |
828 | if (opt && opt->srcrt) { | |
829 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
830 | ipv6_addr_copy(&final, &fl.fl6_dst); | |
831 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
832 | final_p = &final; | |
833 | } | |
834 | ||
835 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) | |
836 | fl.oif = np->mcast_oif; | |
beb8d13b | 837 | security_sk_classify_flow(sk, &fl); |
1da177e4 LT |
838 | |
839 | err = ip6_dst_lookup(sk, &dst, &fl); | |
840 | if (err) | |
841 | goto out; | |
842 | if (final_p) | |
843 | ipv6_addr_copy(&fl.fl6_dst, final_p); | |
844 | ||
14e50e57 DM |
845 | if ((err = __xfrm_lookup(&dst, &fl, sk, 1)) < 0) { |
846 | if (err == -EREMOTE) | |
847 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
848 | if (err < 0) | |
849 | goto out; | |
850 | } | |
1da177e4 LT |
851 | |
852 | if (hlimit < 0) { | |
853 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) | |
854 | hlimit = np->mcast_hops; | |
855 | else | |
856 | hlimit = np->hop_limit; | |
857 | if (hlimit < 0) | |
858 | hlimit = dst_metric(dst, RTAX_HOPLIMIT); | |
859 | if (hlimit < 0) | |
860 | hlimit = ipv6_get_hoplimit(dst->dev); | |
861 | } | |
862 | ||
41a1f8ea | 863 | if (tclass < 0) { |
e012d51c | 864 | tclass = np->tclass; |
41a1f8ea YH |
865 | if (tclass < 0) |
866 | tclass = 0; | |
867 | } | |
868 | ||
1da177e4 LT |
869 | if (msg->msg_flags&MSG_CONFIRM) |
870 | goto do_confirm; | |
871 | ||
872 | back_from_confirm: | |
873 | if (inet->hdrincl) { | |
874 | err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags); | |
875 | } else { | |
876 | lock_sock(sk); | |
41a1f8ea YH |
877 | err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, |
878 | len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst, | |
879 | msg->msg_flags); | |
1da177e4 LT |
880 | |
881 | if (err) | |
882 | ip6_flush_pending_frames(sk); | |
883 | else if (!(msg->msg_flags & MSG_MORE)) | |
357b40a1 | 884 | err = rawv6_push_pending_frames(sk, &fl, rp); |
1da177e4 LT |
885 | } |
886 | done: | |
6d3e85ec | 887 | dst_release(dst); |
4e33fa14 MN |
888 | if (!inet->hdrincl) |
889 | release_sock(sk); | |
1ab1457c | 890 | out: |
1da177e4 LT |
891 | fl6_sock_release(flowlabel); |
892 | return err<0?err:len; | |
893 | do_confirm: | |
894 | dst_confirm(dst); | |
895 | if (!(msg->msg_flags & MSG_PROBE) || len) | |
896 | goto back_from_confirm; | |
897 | err = 0; | |
898 | goto done; | |
899 | } | |
900 | ||
1ab1457c | 901 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
902 | char __user *optval, int optlen) |
903 | { | |
904 | switch (optname) { | |
905 | case ICMPV6_FILTER: | |
906 | if (optlen > sizeof(struct icmp6_filter)) | |
907 | optlen = sizeof(struct icmp6_filter); | |
908 | if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) | |
909 | return -EFAULT; | |
910 | return 0; | |
911 | default: | |
912 | return -ENOPROTOOPT; | |
3ff50b79 | 913 | } |
1da177e4 LT |
914 | |
915 | return 0; | |
916 | } | |
917 | ||
1ab1457c | 918 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
919 | char __user *optval, int __user *optlen) |
920 | { | |
921 | int len; | |
922 | ||
923 | switch (optname) { | |
924 | case ICMPV6_FILTER: | |
925 | if (get_user(len, optlen)) | |
926 | return -EFAULT; | |
927 | if (len < 0) | |
928 | return -EINVAL; | |
929 | if (len > sizeof(struct icmp6_filter)) | |
930 | len = sizeof(struct icmp6_filter); | |
931 | if (put_user(len, optlen)) | |
932 | return -EFAULT; | |
933 | if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) | |
934 | return -EFAULT; | |
935 | return 0; | |
936 | default: | |
937 | return -ENOPROTOOPT; | |
3ff50b79 | 938 | } |
1da177e4 LT |
939 | |
940 | return 0; | |
941 | } | |
942 | ||
943 | ||
3fdadf7d | 944 | static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
945 | char __user *optval, int optlen) |
946 | { | |
947 | struct raw6_sock *rp = raw6_sk(sk); | |
948 | int val; | |
949 | ||
1ab1457c | 950 | if (get_user(val, (int __user *)optval)) |
1da177e4 LT |
951 | return -EFAULT; |
952 | ||
953 | switch (optname) { | |
954 | case IPV6_CHECKSUM: | |
955 | /* You may get strange result with a positive odd offset; | |
956 | RFC2292bis agrees with me. */ | |
957 | if (val > 0 && (val&1)) | |
958 | return(-EINVAL); | |
959 | if (val < 0) { | |
960 | rp->checksum = 0; | |
961 | } else { | |
962 | rp->checksum = 1; | |
963 | rp->offset = val; | |
964 | } | |
965 | ||
966 | return 0; | |
967 | break; | |
968 | ||
969 | default: | |
970 | return(-ENOPROTOOPT); | |
971 | } | |
972 | } | |
973 | ||
3fdadf7d DM |
974 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, |
975 | char __user *optval, int optlen) | |
1da177e4 | 976 | { |
1da177e4 LT |
977 | switch(level) { |
978 | case SOL_RAW: | |
979 | break; | |
980 | ||
981 | case SOL_ICMPV6: | |
982 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
983 | return -EOPNOTSUPP; | |
3fdadf7d | 984 | return rawv6_seticmpfilter(sk, level, optname, optval, |
1da177e4 LT |
985 | optlen); |
986 | case SOL_IPV6: | |
987 | if (optname == IPV6_CHECKSUM) | |
988 | break; | |
989 | default: | |
3fdadf7d | 990 | return ipv6_setsockopt(sk, level, optname, optval, |
1da177e4 | 991 | optlen); |
3ff50b79 SH |
992 | } |
993 | ||
3fdadf7d DM |
994 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
995 | } | |
996 | ||
997 | #ifdef CONFIG_COMPAT | |
998 | static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 999 | char __user *optval, int optlen) |
3fdadf7d | 1000 | { |
543d9cfe ACM |
1001 | switch (level) { |
1002 | case SOL_RAW: | |
1003 | break; | |
1004 | case SOL_ICMPV6: | |
1005 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1006 | return -EOPNOTSUPP; | |
1007 | return rawv6_seticmpfilter(sk, level, optname, optval, optlen); | |
1008 | case SOL_IPV6: | |
1009 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1010 | break; |
543d9cfe ACM |
1011 | default: |
1012 | return compat_ipv6_setsockopt(sk, level, optname, | |
1013 | optval, optlen); | |
3ff50b79 | 1014 | } |
3fdadf7d DM |
1015 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1016 | } | |
1017 | #endif | |
1018 | ||
1019 | static int do_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
1020 | char __user *optval, int __user *optlen) | |
1021 | { | |
1022 | struct raw6_sock *rp = raw6_sk(sk); | |
1023 | int val, len; | |
1da177e4 LT |
1024 | |
1025 | if (get_user(len,optlen)) | |
1026 | return -EFAULT; | |
1027 | ||
1028 | switch (optname) { | |
1029 | case IPV6_CHECKSUM: | |
1030 | if (rp->checksum == 0) | |
1031 | val = -1; | |
1032 | else | |
1033 | val = rp->offset; | |
1034 | break; | |
1035 | ||
1036 | default: | |
1037 | return -ENOPROTOOPT; | |
1038 | } | |
1039 | ||
1040 | len = min_t(unsigned int, sizeof(int), len); | |
1041 | ||
1042 | if (put_user(len, optlen)) | |
1043 | return -EFAULT; | |
1044 | if (copy_to_user(optval,&val,len)) | |
1045 | return -EFAULT; | |
1046 | return 0; | |
1047 | } | |
1048 | ||
3fdadf7d DM |
1049 | static int rawv6_getsockopt(struct sock *sk, int level, int optname, |
1050 | char __user *optval, int __user *optlen) | |
1051 | { | |
1052 | switch(level) { | |
1053 | case SOL_RAW: | |
1054 | break; | |
1055 | ||
1056 | case SOL_ICMPV6: | |
1057 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1058 | return -EOPNOTSUPP; | |
1059 | return rawv6_geticmpfilter(sk, level, optname, optval, | |
1060 | optlen); | |
1061 | case SOL_IPV6: | |
1062 | if (optname == IPV6_CHECKSUM) | |
1063 | break; | |
1064 | default: | |
1065 | return ipv6_getsockopt(sk, level, optname, optval, | |
1066 | optlen); | |
3ff50b79 SH |
1067 | } |
1068 | ||
3fdadf7d DM |
1069 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1070 | } | |
1071 | ||
1072 | #ifdef CONFIG_COMPAT | |
1073 | static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1074 | char __user *optval, int __user *optlen) |
3fdadf7d | 1075 | { |
543d9cfe ACM |
1076 | switch (level) { |
1077 | case SOL_RAW: | |
1078 | break; | |
1079 | case SOL_ICMPV6: | |
1080 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1081 | return -EOPNOTSUPP; | |
1082 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); | |
1083 | case SOL_IPV6: | |
1084 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1085 | break; |
543d9cfe ACM |
1086 | default: |
1087 | return compat_ipv6_getsockopt(sk, level, optname, | |
1088 | optval, optlen); | |
3ff50b79 | 1089 | } |
3fdadf7d DM |
1090 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1091 | } | |
1092 | #endif | |
1093 | ||
1da177e4 LT |
1094 | static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) |
1095 | { | |
1096 | switch(cmd) { | |
1097 | case SIOCOUTQ: | |
1098 | { | |
1099 | int amount = atomic_read(&sk->sk_wmem_alloc); | |
1100 | return put_user(amount, (int __user *)arg); | |
1101 | } | |
1102 | case SIOCINQ: | |
1103 | { | |
1104 | struct sk_buff *skb; | |
1105 | int amount = 0; | |
1106 | ||
e0f9f858 | 1107 | spin_lock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1108 | skb = skb_peek(&sk->sk_receive_queue); |
1109 | if (skb != NULL) | |
27a884dc | 1110 | amount = skb->tail - skb->transport_header; |
e0f9f858 | 1111 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1112 | return put_user(amount, (int __user *)arg); |
1113 | } | |
1114 | ||
1115 | default: | |
1116 | return -ENOIOCTLCMD; | |
1117 | } | |
1118 | } | |
1119 | ||
1120 | static void rawv6_close(struct sock *sk, long timeout) | |
1121 | { | |
1122 | if (inet_sk(sk)->num == IPPROTO_RAW) | |
1123 | ip6_ra_control(sk, -1, NULL); | |
1124 | ||
1125 | sk_common_release(sk); | |
1126 | } | |
1127 | ||
1128 | static int rawv6_init_sk(struct sock *sk) | |
1129 | { | |
f48d5ff1 MN |
1130 | struct raw6_sock *rp = raw6_sk(sk); |
1131 | ||
1132 | switch (inet_sk(sk)->num) { | |
1133 | case IPPROTO_ICMPV6: | |
1da177e4 LT |
1134 | rp->checksum = 1; |
1135 | rp->offset = 2; | |
f48d5ff1 MN |
1136 | break; |
1137 | case IPPROTO_MH: | |
1138 | rp->checksum = 1; | |
1139 | rp->offset = 4; | |
1140 | break; | |
1141 | default: | |
1142 | break; | |
1da177e4 LT |
1143 | } |
1144 | return(0); | |
1145 | } | |
1146 | ||
1147 | struct proto rawv6_prot = { | |
543d9cfe ACM |
1148 | .name = "RAWv6", |
1149 | .owner = THIS_MODULE, | |
1150 | .close = rawv6_close, | |
1151 | .connect = ip6_datagram_connect, | |
1152 | .disconnect = udp_disconnect, | |
1153 | .ioctl = rawv6_ioctl, | |
1154 | .init = rawv6_init_sk, | |
1155 | .destroy = inet6_destroy_sock, | |
1156 | .setsockopt = rawv6_setsockopt, | |
1157 | .getsockopt = rawv6_getsockopt, | |
1158 | .sendmsg = rawv6_sendmsg, | |
1159 | .recvmsg = rawv6_recvmsg, | |
1160 | .bind = rawv6_bind, | |
1161 | .backlog_rcv = rawv6_rcv_skb, | |
1162 | .hash = raw_v6_hash, | |
1163 | .unhash = raw_v6_unhash, | |
1164 | .obj_size = sizeof(struct raw6_sock), | |
3fdadf7d | 1165 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1166 | .compat_setsockopt = compat_rawv6_setsockopt, |
1167 | .compat_getsockopt = compat_rawv6_getsockopt, | |
3fdadf7d | 1168 | #endif |
1da177e4 LT |
1169 | }; |
1170 | ||
1171 | #ifdef CONFIG_PROC_FS | |
1172 | struct raw6_iter_state { | |
1173 | int bucket; | |
1174 | }; | |
1175 | ||
1176 | #define raw6_seq_private(seq) ((struct raw6_iter_state *)(seq)->private) | |
1177 | ||
1178 | static struct sock *raw6_get_first(struct seq_file *seq) | |
1179 | { | |
1180 | struct sock *sk; | |
1181 | struct hlist_node *node; | |
1182 | struct raw6_iter_state* state = raw6_seq_private(seq); | |
1183 | ||
1184 | for (state->bucket = 0; state->bucket < RAWV6_HTABLE_SIZE; ++state->bucket) | |
1185 | sk_for_each(sk, node, &raw_v6_htable[state->bucket]) | |
1186 | if (sk->sk_family == PF_INET6) | |
1187 | goto out; | |
1188 | sk = NULL; | |
1189 | out: | |
1190 | return sk; | |
1191 | } | |
1192 | ||
1193 | static struct sock *raw6_get_next(struct seq_file *seq, struct sock *sk) | |
1194 | { | |
1195 | struct raw6_iter_state* state = raw6_seq_private(seq); | |
1196 | ||
1197 | do { | |
1198 | sk = sk_next(sk); | |
1199 | try_again: | |
1200 | ; | |
1201 | } while (sk && sk->sk_family != PF_INET6); | |
1202 | ||
1203 | if (!sk && ++state->bucket < RAWV6_HTABLE_SIZE) { | |
1204 | sk = sk_head(&raw_v6_htable[state->bucket]); | |
1205 | goto try_again; | |
1206 | } | |
1207 | return sk; | |
1208 | } | |
1209 | ||
1210 | static struct sock *raw6_get_idx(struct seq_file *seq, loff_t pos) | |
1211 | { | |
1212 | struct sock *sk = raw6_get_first(seq); | |
1213 | if (sk) | |
1214 | while (pos && (sk = raw6_get_next(seq, sk)) != NULL) | |
1215 | --pos; | |
1216 | return pos ? NULL : sk; | |
1217 | } | |
1218 | ||
1219 | static void *raw6_seq_start(struct seq_file *seq, loff_t *pos) | |
1220 | { | |
1221 | read_lock(&raw_v6_lock); | |
1222 | return *pos ? raw6_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | |
1223 | } | |
1224 | ||
1225 | static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1226 | { | |
1227 | struct sock *sk; | |
1228 | ||
1229 | if (v == SEQ_START_TOKEN) | |
1230 | sk = raw6_get_first(seq); | |
1231 | else | |
1232 | sk = raw6_get_next(seq, v); | |
1233 | ++*pos; | |
1234 | return sk; | |
1235 | } | |
1236 | ||
1237 | static void raw6_seq_stop(struct seq_file *seq, void *v) | |
1238 | { | |
1239 | read_unlock(&raw_v6_lock); | |
1240 | } | |
1241 | ||
1242 | static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) | |
1243 | { | |
1244 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1245 | struct in6_addr *dest, *src; | |
1246 | __u16 destp, srcp; | |
1247 | ||
1248 | dest = &np->daddr; | |
1249 | src = &np->rcv_saddr; | |
1250 | destp = 0; | |
1251 | srcp = inet_sk(sp)->num; | |
1252 | seq_printf(seq, | |
1253 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
1254 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n", | |
1255 | i, | |
1256 | src->s6_addr32[0], src->s6_addr32[1], | |
1257 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1258 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1259 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1260 | sp->sk_state, |
1da177e4 LT |
1261 | atomic_read(&sp->sk_wmem_alloc), |
1262 | atomic_read(&sp->sk_rmem_alloc), | |
1263 | 0, 0L, 0, | |
1264 | sock_i_uid(sp), 0, | |
1265 | sock_i_ino(sp), | |
1266 | atomic_read(&sp->sk_refcnt), sp); | |
1267 | } | |
1268 | ||
1269 | static int raw6_seq_show(struct seq_file *seq, void *v) | |
1270 | { | |
1271 | if (v == SEQ_START_TOKEN) | |
1272 | seq_printf(seq, | |
1273 | " sl " | |
1274 | "local_address " | |
1275 | "remote_address " | |
1276 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
1277 | " uid timeout inode\n"); | |
1278 | else | |
1279 | raw6_sock_seq_show(seq, v, raw6_seq_private(seq)->bucket); | |
1280 | return 0; | |
1281 | } | |
1282 | ||
56b3d975 | 1283 | static const struct seq_operations raw6_seq_ops = { |
1da177e4 LT |
1284 | .start = raw6_seq_start, |
1285 | .next = raw6_seq_next, | |
1286 | .stop = raw6_seq_stop, | |
1287 | .show = raw6_seq_show, | |
1288 | }; | |
1289 | ||
1290 | static int raw6_seq_open(struct inode *inode, struct file *file) | |
1291 | { | |
1292 | struct seq_file *seq; | |
1293 | int rc = -ENOMEM; | |
0c600eda | 1294 | struct raw6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL); |
1da177e4 LT |
1295 | if (!s) |
1296 | goto out; | |
1297 | rc = seq_open(file, &raw6_seq_ops); | |
1298 | if (rc) | |
1299 | goto out_kfree; | |
1300 | seq = file->private_data; | |
1301 | seq->private = s; | |
1da177e4 LT |
1302 | out: |
1303 | return rc; | |
1304 | out_kfree: | |
1305 | kfree(s); | |
1306 | goto out; | |
1307 | } | |
1308 | ||
9a32144e | 1309 | static const struct file_operations raw6_seq_fops = { |
1da177e4 LT |
1310 | .owner = THIS_MODULE, |
1311 | .open = raw6_seq_open, | |
1312 | .read = seq_read, | |
1313 | .llseek = seq_lseek, | |
1314 | .release = seq_release_private, | |
1315 | }; | |
1316 | ||
1317 | int __init raw6_proc_init(void) | |
1318 | { | |
1319 | if (!proc_net_fops_create("raw6", S_IRUGO, &raw6_seq_fops)) | |
1320 | return -ENOMEM; | |
1321 | return 0; | |
1322 | } | |
1323 | ||
1324 | void raw6_proc_exit(void) | |
1325 | { | |
1326 | proc_net_remove("raw6"); | |
1327 | } | |
1328 | #endif /* CONFIG_PROC_FS */ |