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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 | ||
457c4cbc | 38 | #include <net/net_namespace.h> |
1da177e4 LT |
39 | #include <net/ip.h> |
40 | #include <net/sock.h> | |
41 | #include <net/snmp.h> | |
42 | ||
43 | #include <net/ipv6.h> | |
44 | #include <net/ndisc.h> | |
45 | #include <net/protocol.h> | |
46 | #include <net/ip6_route.h> | |
47 | #include <net/ip6_checksum.h> | |
48 | #include <net/addrconf.h> | |
49 | #include <net/transp_v6.h> | |
50 | #include <net/udp.h> | |
51 | #include <net/inet_common.h> | |
c752f073 | 52 | #include <net/tcp_states.h> |
59fbb3a6 | 53 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
7be96f76 MN |
54 | #include <net/mip6.h> |
55 | #endif | |
1da177e4 | 56 | |
b673e4df | 57 | #include <net/raw.h> |
1da177e4 LT |
58 | #include <net/rawv6.h> |
59 | #include <net/xfrm.h> | |
60 | ||
61 | #include <linux/proc_fs.h> | |
62 | #include <linux/seq_file.h> | |
63 | ||
b673e4df | 64 | static struct raw_hashinfo raw_v6_hashinfo = { |
938b93ad | 65 | .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock), |
b673e4df | 66 | }; |
1da177e4 LT |
67 | |
68 | static void raw_v6_hash(struct sock *sk) | |
69 | { | |
65b4c50b | 70 | raw_hash_sk(sk, &raw_v6_hashinfo); |
1da177e4 LT |
71 | } |
72 | ||
73 | static void raw_v6_unhash(struct sock *sk) | |
74 | { | |
ab70768e | 75 | raw_unhash_sk(sk, &raw_v6_hashinfo); |
1da177e4 LT |
76 | } |
77 | ||
78 | ||
be185884 PE |
79 | static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk, |
80 | unsigned short num, struct in6_addr *loc_addr, | |
81 | struct in6_addr *rmt_addr, int dif) | |
1da177e4 LT |
82 | { |
83 | struct hlist_node *node; | |
84 | int is_multicast = ipv6_addr_is_multicast(loc_addr); | |
85 | ||
86 | sk_for_each_from(sk, node) | |
87 | if (inet_sk(sk)->num == num) { | |
88 | struct ipv6_pinfo *np = inet6_sk(sk); | |
89 | ||
be185884 PE |
90 | if (sk->sk_net != net) |
91 | continue; | |
92 | ||
1da177e4 LT |
93 | if (!ipv6_addr_any(&np->daddr) && |
94 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
95 | continue; | |
96 | ||
0bd1b59b AM |
97 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) |
98 | continue; | |
99 | ||
1da177e4 LT |
100 | if (!ipv6_addr_any(&np->rcv_saddr)) { |
101 | if (ipv6_addr_equal(&np->rcv_saddr, loc_addr)) | |
102 | goto found; | |
103 | if (is_multicast && | |
104 | inet6_mc_check(sk, loc_addr, rmt_addr)) | |
105 | goto found; | |
106 | continue; | |
107 | } | |
108 | goto found; | |
109 | } | |
110 | sk = NULL; | |
111 | found: | |
112 | return sk; | |
113 | } | |
114 | ||
115 | /* | |
116 | * 0 - deliver | |
117 | * 1 - block | |
118 | */ | |
119 | static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb) | |
120 | { | |
121 | struct icmp6hdr *icmph; | |
122 | struct raw6_sock *rp = raw6_sk(sk); | |
123 | ||
124 | if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) { | |
125 | __u32 *data = &rp->filter.data[0]; | |
126 | int bit_nr; | |
127 | ||
128 | icmph = (struct icmp6hdr *) skb->data; | |
129 | bit_nr = icmph->icmp6_type; | |
130 | ||
131 | return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0; | |
132 | } | |
133 | return 0; | |
134 | } | |
135 | ||
59fbb3a6 MN |
136 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
137 | static int (*mh_filter)(struct sock *sock, struct sk_buff *skb); | |
138 | ||
139 | int rawv6_mh_filter_register(int (*filter)(struct sock *sock, | |
140 | struct sk_buff *skb)) | |
141 | { | |
142 | rcu_assign_pointer(mh_filter, filter); | |
143 | return 0; | |
144 | } | |
145 | EXPORT_SYMBOL(rawv6_mh_filter_register); | |
146 | ||
147 | int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock, | |
148 | struct sk_buff *skb)) | |
149 | { | |
150 | rcu_assign_pointer(mh_filter, NULL); | |
151 | synchronize_rcu(); | |
152 | return 0; | |
153 | } | |
154 | EXPORT_SYMBOL(rawv6_mh_filter_unregister); | |
155 | ||
156 | #endif | |
157 | ||
1da177e4 LT |
158 | /* |
159 | * demultiplex raw sockets. | |
160 | * (should consider queueing the skb in the sock receive_queue | |
161 | * without calling rawv6.c) | |
162 | * | |
163 | * Caller owns SKB so we must make clones. | |
164 | */ | |
69d6da0b | 165 | static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) |
1da177e4 LT |
166 | { |
167 | struct in6_addr *saddr; | |
168 | struct in6_addr *daddr; | |
169 | struct sock *sk; | |
d13964f4 | 170 | int delivered = 0; |
1da177e4 | 171 | __u8 hash; |
be185884 | 172 | struct net *net; |
1da177e4 | 173 | |
0660e03f | 174 | saddr = &ipv6_hdr(skb)->saddr; |
1da177e4 LT |
175 | daddr = saddr + 1; |
176 | ||
177 | hash = nexthdr & (MAX_INET_PROTOS - 1); | |
178 | ||
b673e4df PE |
179 | read_lock(&raw_v6_hashinfo.lock); |
180 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
1da177e4 LT |
181 | |
182 | /* | |
183 | * The first socket found will be delivered after | |
184 | * delivery to transport protocols. | |
185 | */ | |
186 | ||
187 | if (sk == NULL) | |
188 | goto out; | |
189 | ||
be185884 PE |
190 | net = skb->dev->nd_net; |
191 | sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif); | |
1da177e4 LT |
192 | |
193 | while (sk) { | |
7be96f76 MN |
194 | int filtered; |
195 | ||
d13964f4 | 196 | delivered = 1; |
7be96f76 MN |
197 | switch (nexthdr) { |
198 | case IPPROTO_ICMPV6: | |
199 | filtered = icmpv6_filter(sk, skb); | |
200 | break; | |
59fbb3a6 MN |
201 | |
202 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) | |
7be96f76 | 203 | case IPPROTO_MH: |
59fbb3a6 | 204 | { |
7be96f76 MN |
205 | /* XXX: To validate MH only once for each packet, |
206 | * this is placed here. It should be after checking | |
207 | * xfrm policy, however it doesn't. The checking xfrm | |
208 | * policy is placed in rawv6_rcv() because it is | |
209 | * required for each socket. | |
210 | */ | |
59fbb3a6 MN |
211 | int (*filter)(struct sock *sock, struct sk_buff *skb); |
212 | ||
213 | filter = rcu_dereference(mh_filter); | |
214 | filtered = filter ? filter(sk, skb) : 0; | |
7be96f76 | 215 | break; |
59fbb3a6 | 216 | } |
7be96f76 MN |
217 | #endif |
218 | default: | |
219 | filtered = 0; | |
220 | break; | |
221 | } | |
222 | ||
223 | if (filtered < 0) | |
224 | break; | |
225 | if (filtered == 0) { | |
1da177e4 LT |
226 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); |
227 | ||
228 | /* Not releasing hash table! */ | |
9fb9cbb1 YK |
229 | if (clone) { |
230 | nf_reset(clone); | |
1da177e4 | 231 | rawv6_rcv(sk, clone); |
9fb9cbb1 | 232 | } |
1da177e4 | 233 | } |
be185884 | 234 | sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr, |
2dac4b96 | 235 | IP6CB(skb)->iif); |
1da177e4 LT |
236 | } |
237 | out: | |
b673e4df | 238 | read_unlock(&raw_v6_hashinfo.lock); |
d13964f4 | 239 | return delivered; |
1da177e4 LT |
240 | } |
241 | ||
69d6da0b PE |
242 | int raw6_local_deliver(struct sk_buff *skb, int nexthdr) |
243 | { | |
244 | struct sock *raw_sk; | |
245 | ||
b673e4df | 246 | raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]); |
69d6da0b PE |
247 | if (raw_sk && !ipv6_raw_deliver(skb, nexthdr)) |
248 | raw_sk = NULL; | |
249 | ||
250 | return raw_sk != NULL; | |
251 | } | |
252 | ||
1da177e4 LT |
253 | /* This cleans up af_inet6 a bit. -DaveM */ |
254 | static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
255 | { | |
256 | struct inet_sock *inet = inet_sk(sk); | |
257 | struct ipv6_pinfo *np = inet6_sk(sk); | |
258 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; | |
e69a4adc | 259 | __be32 v4addr = 0; |
1da177e4 LT |
260 | int addr_type; |
261 | int err; | |
262 | ||
263 | if (addr_len < SIN6_LEN_RFC2133) | |
264 | return -EINVAL; | |
265 | addr_type = ipv6_addr_type(&addr->sin6_addr); | |
266 | ||
267 | /* Raw sockets are IPv6 only */ | |
268 | if (addr_type == IPV6_ADDR_MAPPED) | |
269 | return(-EADDRNOTAVAIL); | |
270 | ||
271 | lock_sock(sk); | |
272 | ||
273 | err = -EINVAL; | |
274 | if (sk->sk_state != TCP_CLOSE) | |
275 | goto out; | |
276 | ||
277 | /* Check if the address belongs to the host. */ | |
278 | if (addr_type != IPV6_ADDR_ANY) { | |
279 | struct net_device *dev = NULL; | |
280 | ||
281 | if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
282 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
283 | addr->sin6_scope_id) { | |
284 | /* Override any existing binding, if another | |
285 | * one is supplied by user. | |
286 | */ | |
287 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
288 | } | |
1ab1457c | 289 | |
1da177e4 LT |
290 | /* Binding to link-local address requires an interface */ |
291 | if (!sk->sk_bound_dev_if) | |
292 | goto out; | |
293 | ||
e5ba31f1 | 294 | dev = dev_get_by_index(sk->sk_net, sk->sk_bound_dev_if); |
1da177e4 LT |
295 | if (!dev) { |
296 | err = -ENODEV; | |
297 | goto out; | |
298 | } | |
299 | } | |
1ab1457c | 300 | |
1da177e4 LT |
301 | /* ipv4 addr of the socket is invalid. Only the |
302 | * unspecified and mapped address have a v4 equivalent. | |
303 | */ | |
304 | v4addr = LOOPBACK4_IPV6; | |
305 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
306 | err = -EADDRNOTAVAIL; | |
e5ba31f1 | 307 | if (!ipv6_chk_addr(sk->sk_net, &addr->sin6_addr, |
bfeade08 | 308 | dev, 0)) { |
1da177e4 LT |
309 | if (dev) |
310 | dev_put(dev); | |
311 | goto out; | |
312 | } | |
313 | } | |
314 | if (dev) | |
315 | dev_put(dev); | |
316 | } | |
317 | ||
318 | inet->rcv_saddr = inet->saddr = v4addr; | |
319 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); | |
320 | if (!(addr_type & IPV6_ADDR_MULTICAST)) | |
321 | ipv6_addr_copy(&np->saddr, &addr->sin6_addr); | |
322 | err = 0; | |
323 | out: | |
324 | release_sock(sk); | |
325 | return err; | |
326 | } | |
327 | ||
69d6da0b | 328 | static void rawv6_err(struct sock *sk, struct sk_buff *skb, |
1da177e4 | 329 | struct inet6_skb_parm *opt, |
04ce6909 | 330 | int type, int code, int offset, __be32 info) |
1da177e4 LT |
331 | { |
332 | struct inet_sock *inet = inet_sk(sk); | |
333 | struct ipv6_pinfo *np = inet6_sk(sk); | |
334 | int err; | |
335 | int harderr; | |
336 | ||
337 | /* Report error on raw socket, if: | |
338 | 1. User requested recverr. | |
339 | 2. Socket is connected (otherwise the error indication | |
340 | is useless without recverr and error is hard. | |
341 | */ | |
342 | if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) | |
343 | return; | |
344 | ||
345 | harderr = icmpv6_err_convert(type, code, &err); | |
346 | if (type == ICMPV6_PKT_TOOBIG) | |
347 | harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); | |
348 | ||
349 | if (np->recverr) { | |
350 | u8 *payload = skb->data; | |
351 | if (!inet->hdrincl) | |
352 | payload += offset; | |
353 | ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); | |
354 | } | |
355 | ||
356 | if (np->recverr || harderr) { | |
357 | sk->sk_err = err; | |
358 | sk->sk_error_report(sk); | |
359 | } | |
360 | } | |
361 | ||
69d6da0b PE |
362 | void raw6_icmp_error(struct sk_buff *skb, int nexthdr, |
363 | int type, int code, int inner_offset, __be32 info) | |
364 | { | |
365 | struct sock *sk; | |
366 | int hash; | |
367 | struct in6_addr *saddr, *daddr; | |
be185884 | 368 | struct net *net; |
69d6da0b | 369 | |
b673e4df | 370 | hash = nexthdr & (RAW_HTABLE_SIZE - 1); |
69d6da0b | 371 | |
b673e4df PE |
372 | read_lock(&raw_v6_hashinfo.lock); |
373 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
69d6da0b PE |
374 | if (sk != NULL) { |
375 | saddr = &ipv6_hdr(skb)->saddr; | |
376 | daddr = &ipv6_hdr(skb)->daddr; | |
be185884 | 377 | net = skb->dev->nd_net; |
69d6da0b | 378 | |
be185884 | 379 | while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr, |
69d6da0b PE |
380 | IP6CB(skb)->iif))) { |
381 | rawv6_err(sk, skb, NULL, type, code, | |
382 | inner_offset, info); | |
383 | sk = sk_next(sk); | |
384 | } | |
385 | } | |
b673e4df | 386 | read_unlock(&raw_v6_hashinfo.lock); |
69d6da0b PE |
387 | } |
388 | ||
1da177e4 LT |
389 | static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb) |
390 | { | |
1ab1457c | 391 | if ((raw6_sk(sk)->checksum || sk->sk_filter) && |
fb286bb2 | 392 | skb_checksum_complete(skb)) { |
a92aa318 | 393 | atomic_inc(&sk->sk_drops); |
fb286bb2 HX |
394 | kfree_skb(skb); |
395 | return 0; | |
1da177e4 LT |
396 | } |
397 | ||
398 | /* Charge it to the socket. */ | |
399 | if (sock_queue_rcv_skb(sk,skb)<0) { | |
a92aa318 | 400 | atomic_inc(&sk->sk_drops); |
1da177e4 LT |
401 | kfree_skb(skb); |
402 | return 0; | |
403 | } | |
404 | ||
405 | return 0; | |
406 | } | |
407 | ||
408 | /* | |
1ab1457c | 409 | * This is next to useless... |
1da177e4 | 410 | * if we demultiplex in network layer we don't need the extra call |
1ab1457c YH |
411 | * just to queue the skb... |
412 | * maybe we could have the network decide upon a hint if it | |
1da177e4 LT |
413 | * should call raw_rcv for demultiplexing |
414 | */ | |
415 | int rawv6_rcv(struct sock *sk, struct sk_buff *skb) | |
416 | { | |
417 | struct inet_sock *inet = inet_sk(sk); | |
418 | struct raw6_sock *rp = raw6_sk(sk); | |
419 | ||
1ab1457c | 420 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { |
a92aa318 | 421 | atomic_inc(&sk->sk_drops); |
1ab1457c YH |
422 | kfree_skb(skb); |
423 | return NET_RX_DROP; | |
424 | } | |
1da177e4 LT |
425 | |
426 | if (!rp->checksum) | |
427 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
428 | ||
84fa7933 | 429 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
d56f90a7 | 430 | skb_postpull_rcsum(skb, skb_network_header(skb), |
cfe1fc77 | 431 | skb_network_header_len(skb)); |
0660e03f ACM |
432 | if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
433 | &ipv6_hdr(skb)->daddr, | |
fb286bb2 | 434 | skb->len, inet->num, skb->csum)) |
1da177e4 | 435 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1da177e4 | 436 | } |
60476372 | 437 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
438 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
439 | &ipv6_hdr(skb)->daddr, | |
440 | skb->len, | |
441 | inet->num, 0)); | |
1da177e4 LT |
442 | |
443 | if (inet->hdrincl) { | |
fb286bb2 | 444 | if (skb_checksum_complete(skb)) { |
a92aa318 | 445 | atomic_inc(&sk->sk_drops); |
1da177e4 LT |
446 | kfree_skb(skb); |
447 | return 0; | |
448 | } | |
1da177e4 LT |
449 | } |
450 | ||
451 | rawv6_rcv_skb(sk, skb); | |
452 | return 0; | |
453 | } | |
454 | ||
455 | ||
456 | /* | |
457 | * This should be easy, if there is something there | |
458 | * we return it, otherwise we block. | |
459 | */ | |
460 | ||
461 | static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk, | |
462 | struct msghdr *msg, size_t len, | |
463 | int noblock, int flags, int *addr_len) | |
464 | { | |
465 | struct ipv6_pinfo *np = inet6_sk(sk); | |
466 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name; | |
467 | struct sk_buff *skb; | |
468 | size_t copied; | |
469 | int err; | |
470 | ||
471 | if (flags & MSG_OOB) | |
472 | return -EOPNOTSUPP; | |
1ab1457c YH |
473 | |
474 | if (addr_len) | |
1da177e4 LT |
475 | *addr_len=sizeof(*sin6); |
476 | ||
477 | if (flags & MSG_ERRQUEUE) | |
478 | return ipv6_recv_error(sk, msg, len); | |
479 | ||
480 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
481 | if (!skb) | |
482 | goto out; | |
483 | ||
484 | copied = skb->len; | |
1ab1457c YH |
485 | if (copied > len) { |
486 | copied = len; | |
487 | msg->msg_flags |= MSG_TRUNC; | |
488 | } | |
1da177e4 | 489 | |
60476372 | 490 | if (skb_csum_unnecessary(skb)) { |
1da177e4 LT |
491 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
492 | } else if (msg->msg_flags&MSG_TRUNC) { | |
fb286bb2 | 493 | if (__skb_checksum_complete(skb)) |
1da177e4 LT |
494 | goto csum_copy_err; |
495 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
496 | } else { | |
497 | err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov); | |
498 | if (err == -EINVAL) | |
499 | goto csum_copy_err; | |
500 | } | |
501 | if (err) | |
502 | goto out_free; | |
503 | ||
504 | /* Copy the address. */ | |
505 | if (sin6) { | |
506 | sin6->sin6_family = AF_INET6; | |
f59fc7f3 | 507 | sin6->sin6_port = 0; |
0660e03f | 508 | ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr); |
1da177e4 LT |
509 | sin6->sin6_flowinfo = 0; |
510 | sin6->sin6_scope_id = 0; | |
511 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
512 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
513 | } | |
514 | ||
515 | sock_recv_timestamp(msg, sk, skb); | |
516 | ||
517 | if (np->rxopt.all) | |
518 | datagram_recv_ctl(sk, msg, skb); | |
519 | ||
520 | err = copied; | |
521 | if (flags & MSG_TRUNC) | |
522 | err = skb->len; | |
523 | ||
524 | out_free: | |
525 | skb_free_datagram(sk, skb); | |
526 | out: | |
527 | return err; | |
528 | ||
529 | csum_copy_err: | |
3305b80c | 530 | skb_kill_datagram(sk, skb, flags); |
1da177e4 LT |
531 | |
532 | /* Error for blocking case is chosen to masquerade | |
533 | as some normal condition. | |
534 | */ | |
535 | err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; | |
a92aa318 | 536 | atomic_inc(&sk->sk_drops); |
3305b80c | 537 | goto out; |
1da177e4 LT |
538 | } |
539 | ||
540 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl, | |
357b40a1 | 541 | struct raw6_sock *rp) |
1da177e4 LT |
542 | { |
543 | struct sk_buff *skb; | |
544 | int err = 0; | |
357b40a1 HX |
545 | int offset; |
546 | int len; | |
679a8738 | 547 | int total_len; |
868c86bc AV |
548 | __wsum tmp_csum; |
549 | __sum16 csum; | |
1da177e4 LT |
550 | |
551 | if (!rp->checksum) | |
552 | goto send; | |
553 | ||
554 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
555 | goto out; | |
556 | ||
357b40a1 | 557 | offset = rp->offset; |
d56f90a7 ACM |
558 | total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) - |
559 | skb->data); | |
679a8738 | 560 | if (offset >= total_len - 1) { |
1da177e4 | 561 | err = -EINVAL; |
357b40a1 | 562 | ip6_flush_pending_frames(sk); |
1da177e4 LT |
563 | goto out; |
564 | } | |
565 | ||
566 | /* should be check HW csum miyazawa */ | |
567 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
568 | /* | |
569 | * Only one fragment on the socket. | |
570 | */ | |
571 | tmp_csum = skb->csum; | |
572 | } else { | |
357b40a1 | 573 | struct sk_buff *csum_skb = NULL; |
1da177e4 LT |
574 | tmp_csum = 0; |
575 | ||
576 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
577 | tmp_csum = csum_add(tmp_csum, skb->csum); | |
357b40a1 HX |
578 | |
579 | if (csum_skb) | |
580 | continue; | |
581 | ||
ea2ae17d | 582 | len = skb->len - skb_transport_offset(skb); |
357b40a1 HX |
583 | if (offset >= len) { |
584 | offset -= len; | |
585 | continue; | |
586 | } | |
587 | ||
588 | csum_skb = skb; | |
1da177e4 | 589 | } |
357b40a1 HX |
590 | |
591 | skb = csum_skb; | |
1da177e4 LT |
592 | } |
593 | ||
ea2ae17d | 594 | offset += skb_transport_offset(skb); |
357b40a1 HX |
595 | if (skb_copy_bits(skb, offset, &csum, 2)) |
596 | BUG(); | |
597 | ||
1da177e4 | 598 | /* in case cksum was not initialized */ |
357b40a1 | 599 | if (unlikely(csum)) |
5f92a738 | 600 | tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); |
357b40a1 | 601 | |
868c86bc | 602 | csum = csum_ipv6_magic(&fl->fl6_src, |
357b40a1 | 603 | &fl->fl6_dst, |
679a8738 | 604 | total_len, fl->proto, tmp_csum); |
357b40a1 | 605 | |
f6ab0288 AV |
606 | if (csum == 0 && fl->proto == IPPROTO_UDP) |
607 | csum = CSUM_MANGLED_0; | |
1da177e4 | 608 | |
357b40a1 HX |
609 | if (skb_store_bits(skb, offset, &csum, 2)) |
610 | BUG(); | |
1da177e4 | 611 | |
1da177e4 LT |
612 | send: |
613 | err = ip6_push_pending_frames(sk); | |
614 | out: | |
615 | return err; | |
616 | } | |
617 | ||
618 | static int rawv6_send_hdrinc(struct sock *sk, void *from, int length, | |
1ab1457c | 619 | struct flowi *fl, struct rt6_info *rt, |
1da177e4 LT |
620 | unsigned int flags) |
621 | { | |
3320da89 | 622 | struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 LT |
623 | struct ipv6hdr *iph; |
624 | struct sk_buff *skb; | |
625 | unsigned int hh_len; | |
626 | int err; | |
627 | ||
628 | if (length > rt->u.dst.dev->mtu) { | |
629 | ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu); | |
630 | return -EMSGSIZE; | |
631 | } | |
632 | if (flags&MSG_PROBE) | |
633 | goto out; | |
634 | ||
635 | hh_len = LL_RESERVED_SPACE(rt->u.dst.dev); | |
636 | ||
637 | skb = sock_alloc_send_skb(sk, length+hh_len+15, | |
638 | flags&MSG_DONTWAIT, &err); | |
639 | if (skb == NULL) | |
1ab1457c | 640 | goto error; |
1da177e4 LT |
641 | skb_reserve(skb, hh_len); |
642 | ||
643 | skb->priority = sk->sk_priority; | |
4a19ec58 | 644 | skb->mark = sk->sk_mark; |
1da177e4 LT |
645 | skb->dst = dst_clone(&rt->u.dst); |
646 | ||
1ced98e8 ACM |
647 | skb_put(skb, length); |
648 | skb_reset_network_header(skb); | |
0660e03f | 649 | iph = ipv6_hdr(skb); |
1da177e4 LT |
650 | |
651 | skb->ip_summed = CHECKSUM_NONE; | |
652 | ||
b0e380b1 | 653 | skb->transport_header = skb->network_header; |
1da177e4 LT |
654 | err = memcpy_fromiovecend((void *)iph, from, 0, length); |
655 | if (err) | |
656 | goto error_fault; | |
657 | ||
a11d206d | 658 | IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS); |
6e23ae2a | 659 | err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev, |
1da177e4 LT |
660 | dst_output); |
661 | if (err > 0) | |
3320da89 | 662 | err = np->recverr ? net_xmit_errno(err) : 0; |
1da177e4 LT |
663 | if (err) |
664 | goto error; | |
665 | out: | |
666 | return 0; | |
667 | ||
668 | error_fault: | |
669 | err = -EFAULT; | |
670 | kfree_skb(skb); | |
671 | error: | |
a11d206d | 672 | IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); |
1ab1457c | 673 | return err; |
1da177e4 LT |
674 | } |
675 | ||
a27b58fe | 676 | static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) |
1da177e4 LT |
677 | { |
678 | struct iovec *iov; | |
679 | u8 __user *type = NULL; | |
680 | u8 __user *code = NULL; | |
6e8f4d48 | 681 | u8 len = 0; |
1da177e4 LT |
682 | int probed = 0; |
683 | int i; | |
684 | ||
685 | if (!msg->msg_iov) | |
a27b58fe | 686 | return 0; |
1da177e4 LT |
687 | |
688 | for (i = 0; i < msg->msg_iovlen; i++) { | |
689 | iov = &msg->msg_iov[i]; | |
690 | if (!iov) | |
691 | continue; | |
692 | ||
693 | switch (fl->proto) { | |
694 | case IPPROTO_ICMPV6: | |
695 | /* check if one-byte field is readable or not. */ | |
696 | if (iov->iov_base && iov->iov_len < 1) | |
697 | break; | |
698 | ||
699 | if (!type) { | |
700 | type = iov->iov_base; | |
701 | /* check if code field is readable or not. */ | |
702 | if (iov->iov_len > 1) | |
703 | code = type + 1; | |
704 | } else if (!code) | |
705 | code = iov->iov_base; | |
706 | ||
707 | if (type && code) { | |
a27b58fe HC |
708 | if (get_user(fl->fl_icmp_type, type) || |
709 | get_user(fl->fl_icmp_code, code)) | |
710 | return -EFAULT; | |
1da177e4 LT |
711 | probed = 1; |
712 | } | |
713 | break; | |
6e8f4d48 MN |
714 | case IPPROTO_MH: |
715 | if (iov->iov_base && iov->iov_len < 1) | |
716 | break; | |
717 | /* check if type field is readable or not. */ | |
718 | if (iov->iov_len > 2 - len) { | |
719 | u8 __user *p = iov->iov_base; | |
a27b58fe HC |
720 | if (get_user(fl->fl_mh_type, &p[2 - len])) |
721 | return -EFAULT; | |
6e8f4d48 MN |
722 | probed = 1; |
723 | } else | |
724 | len += iov->iov_len; | |
725 | ||
726 | break; | |
1da177e4 LT |
727 | default: |
728 | probed = 1; | |
729 | break; | |
730 | } | |
731 | if (probed) | |
732 | break; | |
733 | } | |
a27b58fe | 734 | return 0; |
1da177e4 LT |
735 | } |
736 | ||
737 | static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, | |
738 | struct msghdr *msg, size_t len) | |
739 | { | |
740 | struct ipv6_txoptions opt_space; | |
741 | struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
742 | struct in6_addr *daddr, *final_p = NULL, final; | |
743 | struct inet_sock *inet = inet_sk(sk); | |
744 | struct ipv6_pinfo *np = inet6_sk(sk); | |
745 | struct raw6_sock *rp = raw6_sk(sk); | |
746 | struct ipv6_txoptions *opt = NULL; | |
747 | struct ip6_flowlabel *flowlabel = NULL; | |
748 | struct dst_entry *dst = NULL; | |
749 | struct flowi fl; | |
750 | int addr_len = msg->msg_namelen; | |
751 | int hlimit = -1; | |
41a1f8ea | 752 | int tclass = -1; |
1da177e4 LT |
753 | u16 proto; |
754 | int err; | |
755 | ||
756 | /* Rough check on arithmetic overflow, | |
b59e139b | 757 | better check is made in ip6_append_data(). |
1da177e4 | 758 | */ |
b59e139b | 759 | if (len > INT_MAX) |
1da177e4 LT |
760 | return -EMSGSIZE; |
761 | ||
762 | /* Mirror BSD error message compatibility */ | |
1ab1457c | 763 | if (msg->msg_flags & MSG_OOB) |
1da177e4 LT |
764 | return -EOPNOTSUPP; |
765 | ||
766 | /* | |
1ab1457c | 767 | * Get and verify the address. |
1da177e4 LT |
768 | */ |
769 | memset(&fl, 0, sizeof(fl)); | |
770 | ||
4a19ec58 LAT |
771 | fl.mark = sk->sk_mark; |
772 | ||
1da177e4 | 773 | if (sin6) { |
1ab1457c | 774 | if (addr_len < SIN6_LEN_RFC2133) |
1da177e4 LT |
775 | return -EINVAL; |
776 | ||
1ab1457c | 777 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) |
1da177e4 LT |
778 | return(-EAFNOSUPPORT); |
779 | ||
780 | /* port is the proto value [0..255] carried in nexthdr */ | |
781 | proto = ntohs(sin6->sin6_port); | |
782 | ||
783 | if (!proto) | |
784 | proto = inet->num; | |
785 | else if (proto != inet->num) | |
786 | return(-EINVAL); | |
787 | ||
788 | if (proto > 255) | |
789 | return(-EINVAL); | |
790 | ||
791 | daddr = &sin6->sin6_addr; | |
792 | if (np->sndflow) { | |
793 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; | |
794 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
795 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
796 | if (flowlabel == NULL) | |
797 | return -EINVAL; | |
798 | daddr = &flowlabel->dst; | |
799 | } | |
800 | } | |
801 | ||
802 | /* | |
803 | * Otherwise it will be difficult to maintain | |
804 | * sk->sk_dst_cache. | |
805 | */ | |
806 | if (sk->sk_state == TCP_ESTABLISHED && | |
807 | ipv6_addr_equal(daddr, &np->daddr)) | |
808 | daddr = &np->daddr; | |
809 | ||
810 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
811 | sin6->sin6_scope_id && | |
812 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
813 | fl.oif = sin6->sin6_scope_id; | |
814 | } else { | |
1ab1457c | 815 | if (sk->sk_state != TCP_ESTABLISHED) |
1da177e4 | 816 | return -EDESTADDRREQ; |
1ab1457c | 817 | |
1da177e4 LT |
818 | proto = inet->num; |
819 | daddr = &np->daddr; | |
820 | fl.fl6_flowlabel = np->flow_label; | |
821 | } | |
822 | ||
823 | if (ipv6_addr_any(daddr)) { | |
1ab1457c YH |
824 | /* |
825 | * unspecified destination address | |
1da177e4 LT |
826 | * treated as error... is this correct ? |
827 | */ | |
828 | fl6_sock_release(flowlabel); | |
829 | return(-EINVAL); | |
830 | } | |
831 | ||
832 | if (fl.oif == 0) | |
833 | fl.oif = sk->sk_bound_dev_if; | |
834 | ||
835 | if (msg->msg_controllen) { | |
836 | opt = &opt_space; | |
837 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
838 | opt->tot_len = sizeof(struct ipv6_txoptions); | |
839 | ||
41a1f8ea | 840 | err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
841 | if (err < 0) { |
842 | fl6_sock_release(flowlabel); | |
843 | return err; | |
844 | } | |
845 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { | |
846 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
847 | if (flowlabel == NULL) | |
848 | return -EINVAL; | |
849 | } | |
850 | if (!(opt->opt_nflen|opt->opt_flen)) | |
851 | opt = NULL; | |
852 | } | |
853 | if (opt == NULL) | |
854 | opt = np->opt; | |
df9890c3 YH |
855 | if (flowlabel) |
856 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
857 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 LT |
858 | |
859 | fl.proto = proto; | |
a27b58fe HC |
860 | err = rawv6_probe_proto_opt(&fl, msg); |
861 | if (err) | |
862 | goto out; | |
1ab1457c | 863 | |
1da177e4 LT |
864 | ipv6_addr_copy(&fl.fl6_dst, daddr); |
865 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) | |
866 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
867 | ||
868 | /* merge ip6_build_xmit from ip6_output */ | |
869 | if (opt && opt->srcrt) { | |
870 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
871 | ipv6_addr_copy(&final, &fl.fl6_dst); | |
872 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
873 | final_p = &final; | |
874 | } | |
875 | ||
876 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) | |
877 | fl.oif = np->mcast_oif; | |
beb8d13b | 878 | security_sk_classify_flow(sk, &fl); |
1da177e4 LT |
879 | |
880 | err = ip6_dst_lookup(sk, &dst, &fl); | |
881 | if (err) | |
882 | goto out; | |
883 | if (final_p) | |
884 | ipv6_addr_copy(&fl.fl6_dst, final_p); | |
885 | ||
bb72845e | 886 | if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) { |
14e50e57 DM |
887 | if (err == -EREMOTE) |
888 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
889 | if (err < 0) | |
890 | goto out; | |
891 | } | |
1da177e4 LT |
892 | |
893 | if (hlimit < 0) { | |
894 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) | |
895 | hlimit = np->mcast_hops; | |
896 | else | |
897 | hlimit = np->hop_limit; | |
898 | if (hlimit < 0) | |
899 | hlimit = dst_metric(dst, RTAX_HOPLIMIT); | |
900 | if (hlimit < 0) | |
901 | hlimit = ipv6_get_hoplimit(dst->dev); | |
902 | } | |
903 | ||
41a1f8ea | 904 | if (tclass < 0) { |
e012d51c | 905 | tclass = np->tclass; |
41a1f8ea YH |
906 | if (tclass < 0) |
907 | tclass = 0; | |
908 | } | |
909 | ||
1da177e4 LT |
910 | if (msg->msg_flags&MSG_CONFIRM) |
911 | goto do_confirm; | |
912 | ||
913 | back_from_confirm: | |
914 | if (inet->hdrincl) { | |
915 | err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags); | |
916 | } else { | |
917 | lock_sock(sk); | |
41a1f8ea YH |
918 | err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, |
919 | len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst, | |
920 | msg->msg_flags); | |
1da177e4 LT |
921 | |
922 | if (err) | |
923 | ip6_flush_pending_frames(sk); | |
924 | else if (!(msg->msg_flags & MSG_MORE)) | |
357b40a1 | 925 | err = rawv6_push_pending_frames(sk, &fl, rp); |
3ef9d943 | 926 | release_sock(sk); |
1da177e4 LT |
927 | } |
928 | done: | |
6d3e85ec | 929 | dst_release(dst); |
1ab1457c | 930 | out: |
1da177e4 LT |
931 | fl6_sock_release(flowlabel); |
932 | return err<0?err:len; | |
933 | do_confirm: | |
934 | dst_confirm(dst); | |
935 | if (!(msg->msg_flags & MSG_PROBE) || len) | |
936 | goto back_from_confirm; | |
937 | err = 0; | |
938 | goto done; | |
939 | } | |
940 | ||
1ab1457c | 941 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
942 | char __user *optval, int optlen) |
943 | { | |
944 | switch (optname) { | |
945 | case ICMPV6_FILTER: | |
946 | if (optlen > sizeof(struct icmp6_filter)) | |
947 | optlen = sizeof(struct icmp6_filter); | |
948 | if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) | |
949 | return -EFAULT; | |
950 | return 0; | |
951 | default: | |
952 | return -ENOPROTOOPT; | |
3ff50b79 | 953 | } |
1da177e4 LT |
954 | |
955 | return 0; | |
956 | } | |
957 | ||
1ab1457c | 958 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
959 | char __user *optval, int __user *optlen) |
960 | { | |
961 | int len; | |
962 | ||
963 | switch (optname) { | |
964 | case ICMPV6_FILTER: | |
965 | if (get_user(len, optlen)) | |
966 | return -EFAULT; | |
967 | if (len < 0) | |
968 | return -EINVAL; | |
969 | if (len > sizeof(struct icmp6_filter)) | |
970 | len = sizeof(struct icmp6_filter); | |
971 | if (put_user(len, optlen)) | |
972 | return -EFAULT; | |
973 | if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) | |
974 | return -EFAULT; | |
975 | return 0; | |
976 | default: | |
977 | return -ENOPROTOOPT; | |
3ff50b79 | 978 | } |
1da177e4 LT |
979 | |
980 | return 0; | |
981 | } | |
982 | ||
983 | ||
3fdadf7d | 984 | static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
985 | char __user *optval, int optlen) |
986 | { | |
987 | struct raw6_sock *rp = raw6_sk(sk); | |
988 | int val; | |
989 | ||
1ab1457c | 990 | if (get_user(val, (int __user *)optval)) |
1da177e4 LT |
991 | return -EFAULT; |
992 | ||
993 | switch (optname) { | |
994 | case IPV6_CHECKSUM: | |
995 | /* You may get strange result with a positive odd offset; | |
996 | RFC2292bis agrees with me. */ | |
997 | if (val > 0 && (val&1)) | |
998 | return(-EINVAL); | |
999 | if (val < 0) { | |
1000 | rp->checksum = 0; | |
1001 | } else { | |
1002 | rp->checksum = 1; | |
1003 | rp->offset = val; | |
1004 | } | |
1005 | ||
1006 | return 0; | |
1007 | break; | |
1008 | ||
1009 | default: | |
1010 | return(-ENOPROTOOPT); | |
1011 | } | |
1012 | } | |
1013 | ||
3fdadf7d DM |
1014 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, |
1015 | char __user *optval, int optlen) | |
1da177e4 | 1016 | { |
1da177e4 LT |
1017 | switch(level) { |
1018 | case SOL_RAW: | |
1019 | break; | |
1020 | ||
1021 | case SOL_ICMPV6: | |
1022 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1023 | return -EOPNOTSUPP; | |
3fdadf7d | 1024 | return rawv6_seticmpfilter(sk, level, optname, optval, |
1da177e4 LT |
1025 | optlen); |
1026 | case SOL_IPV6: | |
1027 | if (optname == IPV6_CHECKSUM) | |
1028 | break; | |
1029 | default: | |
3fdadf7d | 1030 | return ipv6_setsockopt(sk, level, optname, optval, |
1da177e4 | 1031 | optlen); |
3ff50b79 SH |
1032 | } |
1033 | ||
3fdadf7d DM |
1034 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1035 | } | |
1036 | ||
1037 | #ifdef CONFIG_COMPAT | |
1038 | static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1039 | char __user *optval, int optlen) |
3fdadf7d | 1040 | { |
543d9cfe ACM |
1041 | switch (level) { |
1042 | case SOL_RAW: | |
1043 | break; | |
1044 | case SOL_ICMPV6: | |
1045 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1046 | return -EOPNOTSUPP; | |
1047 | return rawv6_seticmpfilter(sk, level, optname, optval, optlen); | |
1048 | case SOL_IPV6: | |
1049 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1050 | break; |
543d9cfe ACM |
1051 | default: |
1052 | return compat_ipv6_setsockopt(sk, level, optname, | |
1053 | optval, optlen); | |
3ff50b79 | 1054 | } |
3fdadf7d DM |
1055 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1056 | } | |
1057 | #endif | |
1058 | ||
1059 | static int do_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
1060 | char __user *optval, int __user *optlen) | |
1061 | { | |
1062 | struct raw6_sock *rp = raw6_sk(sk); | |
1063 | int val, len; | |
1da177e4 LT |
1064 | |
1065 | if (get_user(len,optlen)) | |
1066 | return -EFAULT; | |
1067 | ||
1068 | switch (optname) { | |
1069 | case IPV6_CHECKSUM: | |
1070 | if (rp->checksum == 0) | |
1071 | val = -1; | |
1072 | else | |
1073 | val = rp->offset; | |
1074 | break; | |
1075 | ||
1076 | default: | |
1077 | return -ENOPROTOOPT; | |
1078 | } | |
1079 | ||
1080 | len = min_t(unsigned int, sizeof(int), len); | |
1081 | ||
1082 | if (put_user(len, optlen)) | |
1083 | return -EFAULT; | |
1084 | if (copy_to_user(optval,&val,len)) | |
1085 | return -EFAULT; | |
1086 | return 0; | |
1087 | } | |
1088 | ||
3fdadf7d DM |
1089 | static int rawv6_getsockopt(struct sock *sk, int level, int optname, |
1090 | char __user *optval, int __user *optlen) | |
1091 | { | |
1092 | switch(level) { | |
1093 | case SOL_RAW: | |
1094 | break; | |
1095 | ||
1096 | case SOL_ICMPV6: | |
1097 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1098 | return -EOPNOTSUPP; | |
1099 | return rawv6_geticmpfilter(sk, level, optname, optval, | |
1100 | optlen); | |
1101 | case SOL_IPV6: | |
1102 | if (optname == IPV6_CHECKSUM) | |
1103 | break; | |
1104 | default: | |
1105 | return ipv6_getsockopt(sk, level, optname, optval, | |
1106 | optlen); | |
3ff50b79 SH |
1107 | } |
1108 | ||
3fdadf7d DM |
1109 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1110 | } | |
1111 | ||
1112 | #ifdef CONFIG_COMPAT | |
1113 | static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1114 | char __user *optval, int __user *optlen) |
3fdadf7d | 1115 | { |
543d9cfe ACM |
1116 | switch (level) { |
1117 | case SOL_RAW: | |
1118 | break; | |
1119 | case SOL_ICMPV6: | |
1120 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1121 | return -EOPNOTSUPP; | |
1122 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); | |
1123 | case SOL_IPV6: | |
1124 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1125 | break; |
543d9cfe ACM |
1126 | default: |
1127 | return compat_ipv6_getsockopt(sk, level, optname, | |
1128 | optval, optlen); | |
3ff50b79 | 1129 | } |
3fdadf7d DM |
1130 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1131 | } | |
1132 | #endif | |
1133 | ||
1da177e4 LT |
1134 | static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) |
1135 | { | |
1136 | switch(cmd) { | |
1137 | case SIOCOUTQ: | |
1138 | { | |
1139 | int amount = atomic_read(&sk->sk_wmem_alloc); | |
1140 | return put_user(amount, (int __user *)arg); | |
1141 | } | |
1142 | case SIOCINQ: | |
1143 | { | |
1144 | struct sk_buff *skb; | |
1145 | int amount = 0; | |
1146 | ||
e0f9f858 | 1147 | spin_lock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1148 | skb = skb_peek(&sk->sk_receive_queue); |
1149 | if (skb != NULL) | |
27a884dc | 1150 | amount = skb->tail - skb->transport_header; |
e0f9f858 | 1151 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1152 | return put_user(amount, (int __user *)arg); |
1153 | } | |
1154 | ||
1155 | default: | |
1156 | return -ENOIOCTLCMD; | |
1157 | } | |
1158 | } | |
1159 | ||
1160 | static void rawv6_close(struct sock *sk, long timeout) | |
1161 | { | |
1162 | if (inet_sk(sk)->num == IPPROTO_RAW) | |
1163 | ip6_ra_control(sk, -1, NULL); | |
1164 | ||
1165 | sk_common_release(sk); | |
1166 | } | |
1167 | ||
1168 | static int rawv6_init_sk(struct sock *sk) | |
1169 | { | |
f48d5ff1 MN |
1170 | struct raw6_sock *rp = raw6_sk(sk); |
1171 | ||
1172 | switch (inet_sk(sk)->num) { | |
1173 | case IPPROTO_ICMPV6: | |
1da177e4 LT |
1174 | rp->checksum = 1; |
1175 | rp->offset = 2; | |
f48d5ff1 MN |
1176 | break; |
1177 | case IPPROTO_MH: | |
1178 | rp->checksum = 1; | |
1179 | rp->offset = 4; | |
1180 | break; | |
1181 | default: | |
1182 | break; | |
1da177e4 LT |
1183 | } |
1184 | return(0); | |
1185 | } | |
1186 | ||
c5a432f1 ED |
1187 | DEFINE_PROTO_INUSE(rawv6) |
1188 | ||
1da177e4 | 1189 | struct proto rawv6_prot = { |
543d9cfe ACM |
1190 | .name = "RAWv6", |
1191 | .owner = THIS_MODULE, | |
1192 | .close = rawv6_close, | |
1193 | .connect = ip6_datagram_connect, | |
1194 | .disconnect = udp_disconnect, | |
1195 | .ioctl = rawv6_ioctl, | |
1196 | .init = rawv6_init_sk, | |
1197 | .destroy = inet6_destroy_sock, | |
1198 | .setsockopt = rawv6_setsockopt, | |
1199 | .getsockopt = rawv6_getsockopt, | |
1200 | .sendmsg = rawv6_sendmsg, | |
1201 | .recvmsg = rawv6_recvmsg, | |
1202 | .bind = rawv6_bind, | |
1203 | .backlog_rcv = rawv6_rcv_skb, | |
1204 | .hash = raw_v6_hash, | |
1205 | .unhash = raw_v6_unhash, | |
1206 | .obj_size = sizeof(struct raw6_sock), | |
3fdadf7d | 1207 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1208 | .compat_setsockopt = compat_rawv6_setsockopt, |
1209 | .compat_getsockopt = compat_rawv6_getsockopt, | |
3fdadf7d | 1210 | #endif |
c5a432f1 | 1211 | REF_PROTO_INUSE(rawv6) |
1da177e4 LT |
1212 | }; |
1213 | ||
1214 | #ifdef CONFIG_PROC_FS | |
1da177e4 LT |
1215 | static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) |
1216 | { | |
1217 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1218 | struct in6_addr *dest, *src; | |
1219 | __u16 destp, srcp; | |
1220 | ||
1221 | dest = &np->daddr; | |
1222 | src = &np->rcv_saddr; | |
1223 | destp = 0; | |
1224 | srcp = inet_sk(sp)->num; | |
1225 | seq_printf(seq, | |
1226 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
a92aa318 | 1227 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1da177e4 LT |
1228 | i, |
1229 | src->s6_addr32[0], src->s6_addr32[1], | |
1230 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1231 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1232 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1233 | sp->sk_state, |
1da177e4 LT |
1234 | atomic_read(&sp->sk_wmem_alloc), |
1235 | atomic_read(&sp->sk_rmem_alloc), | |
1236 | 0, 0L, 0, | |
1237 | sock_i_uid(sp), 0, | |
1238 | sock_i_ino(sp), | |
a92aa318 | 1239 | atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); |
1da177e4 LT |
1240 | } |
1241 | ||
1242 | static int raw6_seq_show(struct seq_file *seq, void *v) | |
1243 | { | |
1244 | if (v == SEQ_START_TOKEN) | |
1245 | seq_printf(seq, | |
1246 | " sl " | |
1247 | "local_address " | |
1248 | "remote_address " | |
1249 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
a92aa318 | 1250 | " uid timeout inode drops\n"); |
1da177e4 | 1251 | else |
42a73808 | 1252 | raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); |
1da177e4 LT |
1253 | return 0; |
1254 | } | |
1255 | ||
56b3d975 | 1256 | static const struct seq_operations raw6_seq_ops = { |
42a73808 PE |
1257 | .start = raw_seq_start, |
1258 | .next = raw_seq_next, | |
1259 | .stop = raw_seq_stop, | |
1da177e4 LT |
1260 | .show = raw6_seq_show, |
1261 | }; | |
1262 | ||
1263 | static int raw6_seq_open(struct inode *inode, struct file *file) | |
1264 | { | |
3046d767 | 1265 | return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops); |
1da177e4 LT |
1266 | } |
1267 | ||
9a32144e | 1268 | static const struct file_operations raw6_seq_fops = { |
1da177e4 LT |
1269 | .owner = THIS_MODULE, |
1270 | .open = raw6_seq_open, | |
1271 | .read = seq_read, | |
1272 | .llseek = seq_lseek, | |
f51d599f | 1273 | .release = seq_release_net, |
1da177e4 LT |
1274 | }; |
1275 | ||
a308da16 | 1276 | static int raw6_init_net(struct net *net) |
1da177e4 | 1277 | { |
a308da16 | 1278 | if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops)) |
1da177e4 | 1279 | return -ENOMEM; |
a308da16 | 1280 | |
1da177e4 LT |
1281 | return 0; |
1282 | } | |
1283 | ||
a308da16 PE |
1284 | static void raw6_exit_net(struct net *net) |
1285 | { | |
1286 | proc_net_remove(net, "raw6"); | |
1287 | } | |
1288 | ||
1289 | static struct pernet_operations raw6_net_ops = { | |
1290 | .init = raw6_init_net, | |
1291 | .exit = raw6_exit_net, | |
1292 | }; | |
1293 | ||
1294 | int __init raw6_proc_init(void) | |
1295 | { | |
1296 | return register_pernet_subsys(&raw6_net_ops); | |
1297 | } | |
1298 | ||
1da177e4 LT |
1299 | void raw6_proc_exit(void) |
1300 | { | |
a308da16 | 1301 | unregister_pernet_subsys(&raw6_net_ops); |
1da177e4 LT |
1302 | } |
1303 | #endif /* CONFIG_PROC_FS */ | |
7f4e4868 DL |
1304 | |
1305 | /* Same as inet6_dgram_ops, sans udp_poll. */ | |
1306 | static const struct proto_ops inet6_sockraw_ops = { | |
1307 | .family = PF_INET6, | |
1308 | .owner = THIS_MODULE, | |
1309 | .release = inet6_release, | |
1310 | .bind = inet6_bind, | |
1311 | .connect = inet_dgram_connect, /* ok */ | |
1312 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
1313 | .accept = sock_no_accept, /* a do nothing */ | |
1314 | .getname = inet6_getname, | |
1315 | .poll = datagram_poll, /* ok */ | |
1316 | .ioctl = inet6_ioctl, /* must change */ | |
1317 | .listen = sock_no_listen, /* ok */ | |
1318 | .shutdown = inet_shutdown, /* ok */ | |
1319 | .setsockopt = sock_common_setsockopt, /* ok */ | |
1320 | .getsockopt = sock_common_getsockopt, /* ok */ | |
1321 | .sendmsg = inet_sendmsg, /* ok */ | |
1322 | .recvmsg = sock_common_recvmsg, /* ok */ | |
1323 | .mmap = sock_no_mmap, | |
1324 | .sendpage = sock_no_sendpage, | |
1325 | #ifdef CONFIG_COMPAT | |
1326 | .compat_setsockopt = compat_sock_common_setsockopt, | |
1327 | .compat_getsockopt = compat_sock_common_getsockopt, | |
1328 | #endif | |
1329 | }; | |
1330 | ||
1331 | static struct inet_protosw rawv6_protosw = { | |
1332 | .type = SOCK_RAW, | |
1333 | .protocol = IPPROTO_IP, /* wild card */ | |
1334 | .prot = &rawv6_prot, | |
1335 | .ops = &inet6_sockraw_ops, | |
1336 | .capability = CAP_NET_RAW, | |
1337 | .no_check = UDP_CSUM_DEFAULT, | |
1338 | .flags = INET_PROTOSW_REUSE, | |
1339 | }; | |
1340 | ||
1341 | int __init rawv6_init(void) | |
1342 | { | |
1343 | int ret; | |
1344 | ||
1345 | ret = inet6_register_protosw(&rawv6_protosw); | |
1346 | if (ret) | |
1347 | goto out; | |
1348 | out: | |
1349 | return ret; | |
1350 | } | |
1351 | ||
09f7709f | 1352 | void rawv6_exit(void) |
7f4e4868 DL |
1353 | { |
1354 | inet6_unregister_protosw(&rawv6_protosw); | |
1355 | } |