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 | |
7bc570c8 | 56 | #include <linux/mroute6.h> |
1da177e4 | 57 | |
b673e4df | 58 | #include <net/raw.h> |
1da177e4 LT |
59 | #include <net/rawv6.h> |
60 | #include <net/xfrm.h> | |
61 | ||
62 | #include <linux/proc_fs.h> | |
63 | #include <linux/seq_file.h> | |
64 | ||
b673e4df | 65 | static struct raw_hashinfo raw_v6_hashinfo = { |
938b93ad | 66 | .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock), |
b673e4df | 67 | }; |
1da177e4 | 68 | |
be185884 PE |
69 | static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk, |
70 | unsigned short num, struct in6_addr *loc_addr, | |
71 | struct in6_addr *rmt_addr, int dif) | |
1da177e4 LT |
72 | { |
73 | struct hlist_node *node; | |
74 | int is_multicast = ipv6_addr_is_multicast(loc_addr); | |
75 | ||
76 | sk_for_each_from(sk, node) | |
77 | if (inet_sk(sk)->num == num) { | |
78 | struct ipv6_pinfo *np = inet6_sk(sk); | |
79 | ||
878628fb | 80 | if (!net_eq(sock_net(sk), net)) |
be185884 PE |
81 | continue; |
82 | ||
1da177e4 LT |
83 | if (!ipv6_addr_any(&np->daddr) && |
84 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
85 | continue; | |
86 | ||
0bd1b59b AM |
87 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) |
88 | continue; | |
89 | ||
1da177e4 LT |
90 | if (!ipv6_addr_any(&np->rcv_saddr)) { |
91 | if (ipv6_addr_equal(&np->rcv_saddr, loc_addr)) | |
92 | goto found; | |
93 | if (is_multicast && | |
94 | inet6_mc_check(sk, loc_addr, rmt_addr)) | |
95 | goto found; | |
96 | continue; | |
97 | } | |
98 | goto found; | |
99 | } | |
100 | sk = NULL; | |
101 | found: | |
102 | return sk; | |
103 | } | |
104 | ||
105 | /* | |
106 | * 0 - deliver | |
107 | * 1 - block | |
108 | */ | |
109 | static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb) | |
110 | { | |
111 | struct icmp6hdr *icmph; | |
112 | struct raw6_sock *rp = raw6_sk(sk); | |
113 | ||
114 | if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) { | |
115 | __u32 *data = &rp->filter.data[0]; | |
116 | int bit_nr; | |
117 | ||
118 | icmph = (struct icmp6hdr *) skb->data; | |
119 | bit_nr = icmph->icmp6_type; | |
120 | ||
121 | return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0; | |
122 | } | |
123 | return 0; | |
124 | } | |
125 | ||
59fbb3a6 MN |
126 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
127 | static int (*mh_filter)(struct sock *sock, struct sk_buff *skb); | |
128 | ||
129 | int rawv6_mh_filter_register(int (*filter)(struct sock *sock, | |
130 | struct sk_buff *skb)) | |
131 | { | |
132 | rcu_assign_pointer(mh_filter, filter); | |
133 | return 0; | |
134 | } | |
135 | EXPORT_SYMBOL(rawv6_mh_filter_register); | |
136 | ||
137 | int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock, | |
138 | struct sk_buff *skb)) | |
139 | { | |
140 | rcu_assign_pointer(mh_filter, NULL); | |
141 | synchronize_rcu(); | |
142 | return 0; | |
143 | } | |
144 | EXPORT_SYMBOL(rawv6_mh_filter_unregister); | |
145 | ||
146 | #endif | |
147 | ||
1da177e4 LT |
148 | /* |
149 | * demultiplex raw sockets. | |
150 | * (should consider queueing the skb in the sock receive_queue | |
151 | * without calling rawv6.c) | |
152 | * | |
153 | * Caller owns SKB so we must make clones. | |
154 | */ | |
69d6da0b | 155 | static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) |
1da177e4 LT |
156 | { |
157 | struct in6_addr *saddr; | |
158 | struct in6_addr *daddr; | |
159 | struct sock *sk; | |
d13964f4 | 160 | int delivered = 0; |
1da177e4 | 161 | __u8 hash; |
be185884 | 162 | struct net *net; |
1da177e4 | 163 | |
0660e03f | 164 | saddr = &ipv6_hdr(skb)->saddr; |
1da177e4 LT |
165 | daddr = saddr + 1; |
166 | ||
167 | hash = nexthdr & (MAX_INET_PROTOS - 1); | |
168 | ||
b673e4df PE |
169 | read_lock(&raw_v6_hashinfo.lock); |
170 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
1da177e4 | 171 | |
1da177e4 LT |
172 | if (sk == NULL) |
173 | goto out; | |
174 | ||
c346dca1 | 175 | net = dev_net(skb->dev); |
be185884 | 176 | sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif); |
1da177e4 LT |
177 | |
178 | while (sk) { | |
7be96f76 MN |
179 | int filtered; |
180 | ||
d13964f4 | 181 | delivered = 1; |
7be96f76 MN |
182 | switch (nexthdr) { |
183 | case IPPROTO_ICMPV6: | |
184 | filtered = icmpv6_filter(sk, skb); | |
185 | break; | |
59fbb3a6 MN |
186 | |
187 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) | |
7be96f76 | 188 | case IPPROTO_MH: |
59fbb3a6 | 189 | { |
7be96f76 MN |
190 | /* XXX: To validate MH only once for each packet, |
191 | * this is placed here. It should be after checking | |
192 | * xfrm policy, however it doesn't. The checking xfrm | |
193 | * policy is placed in rawv6_rcv() because it is | |
194 | * required for each socket. | |
195 | */ | |
59fbb3a6 MN |
196 | int (*filter)(struct sock *sock, struct sk_buff *skb); |
197 | ||
198 | filter = rcu_dereference(mh_filter); | |
199 | filtered = filter ? filter(sk, skb) : 0; | |
7be96f76 | 200 | break; |
59fbb3a6 | 201 | } |
7be96f76 MN |
202 | #endif |
203 | default: | |
204 | filtered = 0; | |
205 | break; | |
206 | } | |
207 | ||
208 | if (filtered < 0) | |
209 | break; | |
210 | if (filtered == 0) { | |
1da177e4 LT |
211 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); |
212 | ||
213 | /* Not releasing hash table! */ | |
9fb9cbb1 YK |
214 | if (clone) { |
215 | nf_reset(clone); | |
1da177e4 | 216 | rawv6_rcv(sk, clone); |
9fb9cbb1 | 217 | } |
1da177e4 | 218 | } |
be185884 | 219 | sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr, |
2dac4b96 | 220 | IP6CB(skb)->iif); |
1da177e4 LT |
221 | } |
222 | out: | |
b673e4df | 223 | read_unlock(&raw_v6_hashinfo.lock); |
d13964f4 | 224 | return delivered; |
1da177e4 LT |
225 | } |
226 | ||
69d6da0b PE |
227 | int raw6_local_deliver(struct sk_buff *skb, int nexthdr) |
228 | { | |
229 | struct sock *raw_sk; | |
230 | ||
b673e4df | 231 | raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]); |
69d6da0b PE |
232 | if (raw_sk && !ipv6_raw_deliver(skb, nexthdr)) |
233 | raw_sk = NULL; | |
234 | ||
235 | return raw_sk != NULL; | |
236 | } | |
237 | ||
1da177e4 LT |
238 | /* This cleans up af_inet6 a bit. -DaveM */ |
239 | static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
240 | { | |
241 | struct inet_sock *inet = inet_sk(sk); | |
242 | struct ipv6_pinfo *np = inet6_sk(sk); | |
243 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; | |
e69a4adc | 244 | __be32 v4addr = 0; |
1da177e4 LT |
245 | int addr_type; |
246 | int err; | |
247 | ||
248 | if (addr_len < SIN6_LEN_RFC2133) | |
249 | return -EINVAL; | |
250 | addr_type = ipv6_addr_type(&addr->sin6_addr); | |
251 | ||
252 | /* Raw sockets are IPv6 only */ | |
253 | if (addr_type == IPV6_ADDR_MAPPED) | |
254 | return(-EADDRNOTAVAIL); | |
255 | ||
256 | lock_sock(sk); | |
257 | ||
258 | err = -EINVAL; | |
259 | if (sk->sk_state != TCP_CLOSE) | |
260 | goto out; | |
261 | ||
262 | /* Check if the address belongs to the host. */ | |
263 | if (addr_type != IPV6_ADDR_ANY) { | |
264 | struct net_device *dev = NULL; | |
265 | ||
266 | if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
267 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
268 | addr->sin6_scope_id) { | |
269 | /* Override any existing binding, if another | |
270 | * one is supplied by user. | |
271 | */ | |
272 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
273 | } | |
1ab1457c | 274 | |
1da177e4 LT |
275 | /* Binding to link-local address requires an interface */ |
276 | if (!sk->sk_bound_dev_if) | |
277 | goto out; | |
278 | ||
3b1e0a65 | 279 | dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if); |
1da177e4 LT |
280 | if (!dev) { |
281 | err = -ENODEV; | |
282 | goto out; | |
283 | } | |
284 | } | |
1ab1457c | 285 | |
1da177e4 LT |
286 | /* ipv4 addr of the socket is invalid. Only the |
287 | * unspecified and mapped address have a v4 equivalent. | |
288 | */ | |
289 | v4addr = LOOPBACK4_IPV6; | |
290 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
291 | err = -EADDRNOTAVAIL; | |
3b1e0a65 | 292 | if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr, |
bfeade08 | 293 | dev, 0)) { |
1da177e4 LT |
294 | if (dev) |
295 | dev_put(dev); | |
296 | goto out; | |
297 | } | |
298 | } | |
299 | if (dev) | |
300 | dev_put(dev); | |
301 | } | |
302 | ||
303 | inet->rcv_saddr = inet->saddr = v4addr; | |
304 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); | |
305 | if (!(addr_type & IPV6_ADDR_MULTICAST)) | |
306 | ipv6_addr_copy(&np->saddr, &addr->sin6_addr); | |
307 | err = 0; | |
308 | out: | |
309 | release_sock(sk); | |
310 | return err; | |
311 | } | |
312 | ||
69d6da0b | 313 | static void rawv6_err(struct sock *sk, struct sk_buff *skb, |
1da177e4 | 314 | struct inet6_skb_parm *opt, |
04ce6909 | 315 | int type, int code, int offset, __be32 info) |
1da177e4 LT |
316 | { |
317 | struct inet_sock *inet = inet_sk(sk); | |
318 | struct ipv6_pinfo *np = inet6_sk(sk); | |
319 | int err; | |
320 | int harderr; | |
321 | ||
322 | /* Report error on raw socket, if: | |
323 | 1. User requested recverr. | |
324 | 2. Socket is connected (otherwise the error indication | |
325 | is useless without recverr and error is hard. | |
326 | */ | |
327 | if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) | |
328 | return; | |
329 | ||
330 | harderr = icmpv6_err_convert(type, code, &err); | |
331 | if (type == ICMPV6_PKT_TOOBIG) | |
332 | harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); | |
333 | ||
334 | if (np->recverr) { | |
335 | u8 *payload = skb->data; | |
336 | if (!inet->hdrincl) | |
337 | payload += offset; | |
338 | ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); | |
339 | } | |
340 | ||
341 | if (np->recverr || harderr) { | |
342 | sk->sk_err = err; | |
343 | sk->sk_error_report(sk); | |
344 | } | |
345 | } | |
346 | ||
69d6da0b PE |
347 | void raw6_icmp_error(struct sk_buff *skb, int nexthdr, |
348 | int type, int code, int inner_offset, __be32 info) | |
349 | { | |
350 | struct sock *sk; | |
351 | int hash; | |
352 | struct in6_addr *saddr, *daddr; | |
be185884 | 353 | struct net *net; |
69d6da0b | 354 | |
b673e4df | 355 | hash = nexthdr & (RAW_HTABLE_SIZE - 1); |
69d6da0b | 356 | |
b673e4df PE |
357 | read_lock(&raw_v6_hashinfo.lock); |
358 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
69d6da0b | 359 | if (sk != NULL) { |
05f175cd YH |
360 | /* Note: ipv6_hdr(skb) != skb->data */ |
361 | struct ipv6hdr *ip6h = (struct ipv6hdr *)skb->data; | |
362 | saddr = &ip6h->saddr; | |
363 | daddr = &ip6h->daddr; | |
c346dca1 | 364 | net = dev_net(skb->dev); |
69d6da0b | 365 | |
be185884 | 366 | while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr, |
69d6da0b PE |
367 | IP6CB(skb)->iif))) { |
368 | rawv6_err(sk, skb, NULL, type, code, | |
369 | inner_offset, info); | |
370 | sk = sk_next(sk); | |
371 | } | |
372 | } | |
b673e4df | 373 | read_unlock(&raw_v6_hashinfo.lock); |
69d6da0b PE |
374 | } |
375 | ||
1da177e4 LT |
376 | static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb) |
377 | { | |
1ab1457c | 378 | if ((raw6_sk(sk)->checksum || sk->sk_filter) && |
fb286bb2 | 379 | skb_checksum_complete(skb)) { |
a92aa318 | 380 | atomic_inc(&sk->sk_drops); |
fb286bb2 HX |
381 | kfree_skb(skb); |
382 | return 0; | |
1da177e4 LT |
383 | } |
384 | ||
385 | /* Charge it to the socket. */ | |
386 | if (sock_queue_rcv_skb(sk,skb)<0) { | |
a92aa318 | 387 | atomic_inc(&sk->sk_drops); |
1da177e4 LT |
388 | kfree_skb(skb); |
389 | return 0; | |
390 | } | |
391 | ||
392 | return 0; | |
393 | } | |
394 | ||
395 | /* | |
1ab1457c | 396 | * This is next to useless... |
1da177e4 | 397 | * if we demultiplex in network layer we don't need the extra call |
1ab1457c YH |
398 | * just to queue the skb... |
399 | * maybe we could have the network decide upon a hint if it | |
1da177e4 LT |
400 | * should call raw_rcv for demultiplexing |
401 | */ | |
402 | int rawv6_rcv(struct sock *sk, struct sk_buff *skb) | |
403 | { | |
404 | struct inet_sock *inet = inet_sk(sk); | |
405 | struct raw6_sock *rp = raw6_sk(sk); | |
406 | ||
1ab1457c | 407 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { |
a92aa318 | 408 | atomic_inc(&sk->sk_drops); |
1ab1457c YH |
409 | kfree_skb(skb); |
410 | return NET_RX_DROP; | |
411 | } | |
1da177e4 LT |
412 | |
413 | if (!rp->checksum) | |
414 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
415 | ||
84fa7933 | 416 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
d56f90a7 | 417 | skb_postpull_rcsum(skb, skb_network_header(skb), |
cfe1fc77 | 418 | skb_network_header_len(skb)); |
0660e03f ACM |
419 | if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
420 | &ipv6_hdr(skb)->daddr, | |
fb286bb2 | 421 | skb->len, inet->num, skb->csum)) |
1da177e4 | 422 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1da177e4 | 423 | } |
60476372 | 424 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
425 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
426 | &ipv6_hdr(skb)->daddr, | |
427 | skb->len, | |
428 | inet->num, 0)); | |
1da177e4 LT |
429 | |
430 | if (inet->hdrincl) { | |
fb286bb2 | 431 | if (skb_checksum_complete(skb)) { |
a92aa318 | 432 | atomic_inc(&sk->sk_drops); |
1da177e4 LT |
433 | kfree_skb(skb); |
434 | return 0; | |
435 | } | |
1da177e4 LT |
436 | } |
437 | ||
438 | rawv6_rcv_skb(sk, skb); | |
439 | return 0; | |
440 | } | |
441 | ||
442 | ||
443 | /* | |
444 | * This should be easy, if there is something there | |
445 | * we return it, otherwise we block. | |
446 | */ | |
447 | ||
448 | static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk, | |
449 | struct msghdr *msg, size_t len, | |
450 | int noblock, int flags, int *addr_len) | |
451 | { | |
452 | struct ipv6_pinfo *np = inet6_sk(sk); | |
453 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name; | |
454 | struct sk_buff *skb; | |
455 | size_t copied; | |
456 | int err; | |
457 | ||
458 | if (flags & MSG_OOB) | |
459 | return -EOPNOTSUPP; | |
1ab1457c YH |
460 | |
461 | if (addr_len) | |
1da177e4 LT |
462 | *addr_len=sizeof(*sin6); |
463 | ||
464 | if (flags & MSG_ERRQUEUE) | |
465 | return ipv6_recv_error(sk, msg, len); | |
466 | ||
467 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
468 | if (!skb) | |
469 | goto out; | |
470 | ||
471 | copied = skb->len; | |
1ab1457c YH |
472 | if (copied > len) { |
473 | copied = len; | |
474 | msg->msg_flags |= MSG_TRUNC; | |
475 | } | |
1da177e4 | 476 | |
60476372 | 477 | if (skb_csum_unnecessary(skb)) { |
1da177e4 LT |
478 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
479 | } else if (msg->msg_flags&MSG_TRUNC) { | |
fb286bb2 | 480 | if (__skb_checksum_complete(skb)) |
1da177e4 LT |
481 | goto csum_copy_err; |
482 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
483 | } else { | |
484 | err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov); | |
485 | if (err == -EINVAL) | |
486 | goto csum_copy_err; | |
487 | } | |
488 | if (err) | |
489 | goto out_free; | |
490 | ||
491 | /* Copy the address. */ | |
492 | if (sin6) { | |
493 | sin6->sin6_family = AF_INET6; | |
f59fc7f3 | 494 | sin6->sin6_port = 0; |
0660e03f | 495 | ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr); |
1da177e4 LT |
496 | sin6->sin6_flowinfo = 0; |
497 | sin6->sin6_scope_id = 0; | |
498 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
499 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
500 | } | |
501 | ||
502 | sock_recv_timestamp(msg, sk, skb); | |
503 | ||
504 | if (np->rxopt.all) | |
505 | datagram_recv_ctl(sk, msg, skb); | |
506 | ||
507 | err = copied; | |
508 | if (flags & MSG_TRUNC) | |
509 | err = skb->len; | |
510 | ||
511 | out_free: | |
512 | skb_free_datagram(sk, skb); | |
513 | out: | |
514 | return err; | |
515 | ||
516 | csum_copy_err: | |
3305b80c | 517 | skb_kill_datagram(sk, skb, flags); |
1da177e4 LT |
518 | |
519 | /* Error for blocking case is chosen to masquerade | |
520 | as some normal condition. | |
521 | */ | |
522 | err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; | |
a92aa318 | 523 | atomic_inc(&sk->sk_drops); |
3305b80c | 524 | goto out; |
1da177e4 LT |
525 | } |
526 | ||
527 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl, | |
357b40a1 | 528 | struct raw6_sock *rp) |
1da177e4 LT |
529 | { |
530 | struct sk_buff *skb; | |
531 | int err = 0; | |
357b40a1 HX |
532 | int offset; |
533 | int len; | |
679a8738 | 534 | int total_len; |
868c86bc AV |
535 | __wsum tmp_csum; |
536 | __sum16 csum; | |
1da177e4 LT |
537 | |
538 | if (!rp->checksum) | |
539 | goto send; | |
540 | ||
541 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
542 | goto out; | |
543 | ||
357b40a1 | 544 | offset = rp->offset; |
d56f90a7 ACM |
545 | total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) - |
546 | skb->data); | |
679a8738 | 547 | if (offset >= total_len - 1) { |
1da177e4 | 548 | err = -EINVAL; |
357b40a1 | 549 | ip6_flush_pending_frames(sk); |
1da177e4 LT |
550 | goto out; |
551 | } | |
552 | ||
553 | /* should be check HW csum miyazawa */ | |
554 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
555 | /* | |
556 | * Only one fragment on the socket. | |
557 | */ | |
558 | tmp_csum = skb->csum; | |
559 | } else { | |
357b40a1 | 560 | struct sk_buff *csum_skb = NULL; |
1da177e4 LT |
561 | tmp_csum = 0; |
562 | ||
563 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
564 | tmp_csum = csum_add(tmp_csum, skb->csum); | |
357b40a1 HX |
565 | |
566 | if (csum_skb) | |
567 | continue; | |
568 | ||
ea2ae17d | 569 | len = skb->len - skb_transport_offset(skb); |
357b40a1 HX |
570 | if (offset >= len) { |
571 | offset -= len; | |
572 | continue; | |
573 | } | |
574 | ||
575 | csum_skb = skb; | |
1da177e4 | 576 | } |
357b40a1 HX |
577 | |
578 | skb = csum_skb; | |
1da177e4 LT |
579 | } |
580 | ||
ea2ae17d | 581 | offset += skb_transport_offset(skb); |
357b40a1 HX |
582 | if (skb_copy_bits(skb, offset, &csum, 2)) |
583 | BUG(); | |
584 | ||
1da177e4 | 585 | /* in case cksum was not initialized */ |
357b40a1 | 586 | if (unlikely(csum)) |
5f92a738 | 587 | tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); |
357b40a1 | 588 | |
868c86bc | 589 | csum = csum_ipv6_magic(&fl->fl6_src, |
357b40a1 | 590 | &fl->fl6_dst, |
679a8738 | 591 | total_len, fl->proto, tmp_csum); |
357b40a1 | 592 | |
f6ab0288 AV |
593 | if (csum == 0 && fl->proto == IPPROTO_UDP) |
594 | csum = CSUM_MANGLED_0; | |
1da177e4 | 595 | |
357b40a1 HX |
596 | if (skb_store_bits(skb, offset, &csum, 2)) |
597 | BUG(); | |
1da177e4 | 598 | |
1da177e4 LT |
599 | send: |
600 | err = ip6_push_pending_frames(sk); | |
601 | out: | |
602 | return err; | |
603 | } | |
604 | ||
605 | static int rawv6_send_hdrinc(struct sock *sk, void *from, int length, | |
1ab1457c | 606 | struct flowi *fl, struct rt6_info *rt, |
1da177e4 LT |
607 | unsigned int flags) |
608 | { | |
3320da89 | 609 | struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 LT |
610 | struct ipv6hdr *iph; |
611 | struct sk_buff *skb; | |
612 | unsigned int hh_len; | |
613 | int err; | |
614 | ||
615 | if (length > rt->u.dst.dev->mtu) { | |
616 | ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu); | |
617 | return -EMSGSIZE; | |
618 | } | |
619 | if (flags&MSG_PROBE) | |
620 | goto out; | |
621 | ||
622 | hh_len = LL_RESERVED_SPACE(rt->u.dst.dev); | |
623 | ||
624 | skb = sock_alloc_send_skb(sk, length+hh_len+15, | |
625 | flags&MSG_DONTWAIT, &err); | |
626 | if (skb == NULL) | |
1ab1457c | 627 | goto error; |
1da177e4 LT |
628 | skb_reserve(skb, hh_len); |
629 | ||
630 | skb->priority = sk->sk_priority; | |
4a19ec58 | 631 | skb->mark = sk->sk_mark; |
1da177e4 LT |
632 | skb->dst = dst_clone(&rt->u.dst); |
633 | ||
1ced98e8 ACM |
634 | skb_put(skb, length); |
635 | skb_reset_network_header(skb); | |
0660e03f | 636 | iph = ipv6_hdr(skb); |
1da177e4 LT |
637 | |
638 | skb->ip_summed = CHECKSUM_NONE; | |
639 | ||
b0e380b1 | 640 | skb->transport_header = skb->network_header; |
1da177e4 LT |
641 | err = memcpy_fromiovecend((void *)iph, from, 0, length); |
642 | if (err) | |
643 | goto error_fault; | |
644 | ||
a11d206d | 645 | IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS); |
6e23ae2a | 646 | err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev, |
1da177e4 LT |
647 | dst_output); |
648 | if (err > 0) | |
3320da89 | 649 | err = np->recverr ? net_xmit_errno(err) : 0; |
1da177e4 LT |
650 | if (err) |
651 | goto error; | |
652 | out: | |
653 | return 0; | |
654 | ||
655 | error_fault: | |
656 | err = -EFAULT; | |
657 | kfree_skb(skb); | |
658 | error: | |
a11d206d | 659 | IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); |
1ab1457c | 660 | return err; |
1da177e4 LT |
661 | } |
662 | ||
a27b58fe | 663 | static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) |
1da177e4 LT |
664 | { |
665 | struct iovec *iov; | |
666 | u8 __user *type = NULL; | |
667 | u8 __user *code = NULL; | |
6e8f4d48 | 668 | u8 len = 0; |
1da177e4 LT |
669 | int probed = 0; |
670 | int i; | |
671 | ||
672 | if (!msg->msg_iov) | |
a27b58fe | 673 | return 0; |
1da177e4 LT |
674 | |
675 | for (i = 0; i < msg->msg_iovlen; i++) { | |
676 | iov = &msg->msg_iov[i]; | |
677 | if (!iov) | |
678 | continue; | |
679 | ||
680 | switch (fl->proto) { | |
681 | case IPPROTO_ICMPV6: | |
682 | /* check if one-byte field is readable or not. */ | |
683 | if (iov->iov_base && iov->iov_len < 1) | |
684 | break; | |
685 | ||
686 | if (!type) { | |
687 | type = iov->iov_base; | |
688 | /* check if code field is readable or not. */ | |
689 | if (iov->iov_len > 1) | |
690 | code = type + 1; | |
691 | } else if (!code) | |
692 | code = iov->iov_base; | |
693 | ||
694 | if (type && code) { | |
a27b58fe HC |
695 | if (get_user(fl->fl_icmp_type, type) || |
696 | get_user(fl->fl_icmp_code, code)) | |
697 | return -EFAULT; | |
1da177e4 LT |
698 | probed = 1; |
699 | } | |
700 | break; | |
6e8f4d48 MN |
701 | case IPPROTO_MH: |
702 | if (iov->iov_base && iov->iov_len < 1) | |
703 | break; | |
704 | /* check if type field is readable or not. */ | |
705 | if (iov->iov_len > 2 - len) { | |
706 | u8 __user *p = iov->iov_base; | |
a27b58fe HC |
707 | if (get_user(fl->fl_mh_type, &p[2 - len])) |
708 | return -EFAULT; | |
6e8f4d48 MN |
709 | probed = 1; |
710 | } else | |
711 | len += iov->iov_len; | |
712 | ||
713 | break; | |
1da177e4 LT |
714 | default: |
715 | probed = 1; | |
716 | break; | |
717 | } | |
718 | if (probed) | |
719 | break; | |
720 | } | |
a27b58fe | 721 | return 0; |
1da177e4 LT |
722 | } |
723 | ||
724 | static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, | |
725 | struct msghdr *msg, size_t len) | |
726 | { | |
727 | struct ipv6_txoptions opt_space; | |
728 | struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
729 | struct in6_addr *daddr, *final_p = NULL, final; | |
730 | struct inet_sock *inet = inet_sk(sk); | |
731 | struct ipv6_pinfo *np = inet6_sk(sk); | |
732 | struct raw6_sock *rp = raw6_sk(sk); | |
733 | struct ipv6_txoptions *opt = NULL; | |
734 | struct ip6_flowlabel *flowlabel = NULL; | |
735 | struct dst_entry *dst = NULL; | |
736 | struct flowi fl; | |
737 | int addr_len = msg->msg_namelen; | |
738 | int hlimit = -1; | |
41a1f8ea | 739 | int tclass = -1; |
1da177e4 LT |
740 | u16 proto; |
741 | int err; | |
742 | ||
743 | /* Rough check on arithmetic overflow, | |
b59e139b | 744 | better check is made in ip6_append_data(). |
1da177e4 | 745 | */ |
b59e139b | 746 | if (len > INT_MAX) |
1da177e4 LT |
747 | return -EMSGSIZE; |
748 | ||
749 | /* Mirror BSD error message compatibility */ | |
1ab1457c | 750 | if (msg->msg_flags & MSG_OOB) |
1da177e4 LT |
751 | return -EOPNOTSUPP; |
752 | ||
753 | /* | |
1ab1457c | 754 | * Get and verify the address. |
1da177e4 LT |
755 | */ |
756 | memset(&fl, 0, sizeof(fl)); | |
757 | ||
4a19ec58 LAT |
758 | fl.mark = sk->sk_mark; |
759 | ||
1da177e4 | 760 | if (sin6) { |
1ab1457c | 761 | if (addr_len < SIN6_LEN_RFC2133) |
1da177e4 LT |
762 | return -EINVAL; |
763 | ||
1ab1457c | 764 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) |
1da177e4 LT |
765 | return(-EAFNOSUPPORT); |
766 | ||
767 | /* port is the proto value [0..255] carried in nexthdr */ | |
768 | proto = ntohs(sin6->sin6_port); | |
769 | ||
770 | if (!proto) | |
771 | proto = inet->num; | |
772 | else if (proto != inet->num) | |
773 | return(-EINVAL); | |
774 | ||
775 | if (proto > 255) | |
776 | return(-EINVAL); | |
777 | ||
778 | daddr = &sin6->sin6_addr; | |
779 | if (np->sndflow) { | |
780 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; | |
781 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
782 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
783 | if (flowlabel == NULL) | |
784 | return -EINVAL; | |
785 | daddr = &flowlabel->dst; | |
786 | } | |
787 | } | |
788 | ||
789 | /* | |
790 | * Otherwise it will be difficult to maintain | |
791 | * sk->sk_dst_cache. | |
792 | */ | |
793 | if (sk->sk_state == TCP_ESTABLISHED && | |
794 | ipv6_addr_equal(daddr, &np->daddr)) | |
795 | daddr = &np->daddr; | |
796 | ||
797 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
798 | sin6->sin6_scope_id && | |
799 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
800 | fl.oif = sin6->sin6_scope_id; | |
801 | } else { | |
1ab1457c | 802 | if (sk->sk_state != TCP_ESTABLISHED) |
1da177e4 | 803 | return -EDESTADDRREQ; |
1ab1457c | 804 | |
1da177e4 LT |
805 | proto = inet->num; |
806 | daddr = &np->daddr; | |
807 | fl.fl6_flowlabel = np->flow_label; | |
808 | } | |
809 | ||
1da177e4 LT |
810 | if (fl.oif == 0) |
811 | fl.oif = sk->sk_bound_dev_if; | |
812 | ||
813 | if (msg->msg_controllen) { | |
814 | opt = &opt_space; | |
815 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
816 | opt->tot_len = sizeof(struct ipv6_txoptions); | |
817 | ||
41a1f8ea | 818 | err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
819 | if (err < 0) { |
820 | fl6_sock_release(flowlabel); | |
821 | return err; | |
822 | } | |
823 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { | |
824 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
825 | if (flowlabel == NULL) | |
826 | return -EINVAL; | |
827 | } | |
828 | if (!(opt->opt_nflen|opt->opt_flen)) | |
829 | opt = NULL; | |
830 | } | |
831 | if (opt == NULL) | |
832 | opt = np->opt; | |
df9890c3 YH |
833 | if (flowlabel) |
834 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
835 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 LT |
836 | |
837 | fl.proto = proto; | |
a27b58fe HC |
838 | err = rawv6_probe_proto_opt(&fl, msg); |
839 | if (err) | |
840 | goto out; | |
1ab1457c | 841 | |
876c7f41 BH |
842 | if (!ipv6_addr_any(daddr)) |
843 | ipv6_addr_copy(&fl.fl6_dst, daddr); | |
844 | else | |
845 | fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ | |
1da177e4 LT |
846 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |
847 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
848 | ||
849 | /* merge ip6_build_xmit from ip6_output */ | |
850 | if (opt && opt->srcrt) { | |
851 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
852 | ipv6_addr_copy(&final, &fl.fl6_dst); | |
853 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
854 | final_p = &final; | |
855 | } | |
856 | ||
857 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) | |
858 | fl.oif = np->mcast_oif; | |
beb8d13b | 859 | security_sk_classify_flow(sk, &fl); |
1da177e4 LT |
860 | |
861 | err = ip6_dst_lookup(sk, &dst, &fl); | |
862 | if (err) | |
863 | goto out; | |
864 | if (final_p) | |
865 | ipv6_addr_copy(&fl.fl6_dst, final_p); | |
866 | ||
bb72845e | 867 | if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) { |
14e50e57 DM |
868 | if (err == -EREMOTE) |
869 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
870 | if (err < 0) | |
871 | goto out; | |
872 | } | |
1da177e4 LT |
873 | |
874 | if (hlimit < 0) { | |
875 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) | |
876 | hlimit = np->mcast_hops; | |
877 | else | |
878 | hlimit = np->hop_limit; | |
879 | if (hlimit < 0) | |
6b75d090 | 880 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
881 | } |
882 | ||
41a1f8ea | 883 | if (tclass < 0) { |
e012d51c | 884 | tclass = np->tclass; |
41a1f8ea YH |
885 | if (tclass < 0) |
886 | tclass = 0; | |
887 | } | |
888 | ||
1da177e4 LT |
889 | if (msg->msg_flags&MSG_CONFIRM) |
890 | goto do_confirm; | |
891 | ||
892 | back_from_confirm: | |
893 | if (inet->hdrincl) { | |
894 | err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags); | |
895 | } else { | |
896 | lock_sock(sk); | |
41a1f8ea YH |
897 | err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, |
898 | len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst, | |
899 | msg->msg_flags); | |
1da177e4 LT |
900 | |
901 | if (err) | |
902 | ip6_flush_pending_frames(sk); | |
903 | else if (!(msg->msg_flags & MSG_MORE)) | |
357b40a1 | 904 | err = rawv6_push_pending_frames(sk, &fl, rp); |
3ef9d943 | 905 | release_sock(sk); |
1da177e4 LT |
906 | } |
907 | done: | |
6d3e85ec | 908 | dst_release(dst); |
1ab1457c | 909 | out: |
1da177e4 LT |
910 | fl6_sock_release(flowlabel); |
911 | return err<0?err:len; | |
912 | do_confirm: | |
913 | dst_confirm(dst); | |
914 | if (!(msg->msg_flags & MSG_PROBE) || len) | |
915 | goto back_from_confirm; | |
916 | err = 0; | |
917 | goto done; | |
918 | } | |
919 | ||
1ab1457c | 920 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
921 | char __user *optval, int optlen) |
922 | { | |
923 | switch (optname) { | |
924 | case ICMPV6_FILTER: | |
925 | if (optlen > sizeof(struct icmp6_filter)) | |
926 | optlen = sizeof(struct icmp6_filter); | |
927 | if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) | |
928 | return -EFAULT; | |
929 | return 0; | |
930 | default: | |
931 | return -ENOPROTOOPT; | |
3ff50b79 | 932 | } |
1da177e4 LT |
933 | |
934 | return 0; | |
935 | } | |
936 | ||
1ab1457c | 937 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
938 | char __user *optval, int __user *optlen) |
939 | { | |
940 | int len; | |
941 | ||
942 | switch (optname) { | |
943 | case ICMPV6_FILTER: | |
944 | if (get_user(len, optlen)) | |
945 | return -EFAULT; | |
946 | if (len < 0) | |
947 | return -EINVAL; | |
948 | if (len > sizeof(struct icmp6_filter)) | |
949 | len = sizeof(struct icmp6_filter); | |
950 | if (put_user(len, optlen)) | |
951 | return -EFAULT; | |
952 | if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) | |
953 | return -EFAULT; | |
954 | return 0; | |
955 | default: | |
956 | return -ENOPROTOOPT; | |
3ff50b79 | 957 | } |
1da177e4 LT |
958 | |
959 | return 0; | |
960 | } | |
961 | ||
962 | ||
3fdadf7d | 963 | static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
964 | char __user *optval, int optlen) |
965 | { | |
966 | struct raw6_sock *rp = raw6_sk(sk); | |
967 | int val; | |
968 | ||
1ab1457c | 969 | if (get_user(val, (int __user *)optval)) |
1da177e4 LT |
970 | return -EFAULT; |
971 | ||
972 | switch (optname) { | |
973 | case IPV6_CHECKSUM: | |
974 | /* You may get strange result with a positive odd offset; | |
975 | RFC2292bis agrees with me. */ | |
976 | if (val > 0 && (val&1)) | |
977 | return(-EINVAL); | |
978 | if (val < 0) { | |
979 | rp->checksum = 0; | |
980 | } else { | |
981 | rp->checksum = 1; | |
982 | rp->offset = val; | |
983 | } | |
984 | ||
985 | return 0; | |
986 | break; | |
987 | ||
988 | default: | |
989 | return(-ENOPROTOOPT); | |
990 | } | |
991 | } | |
992 | ||
3fdadf7d DM |
993 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, |
994 | char __user *optval, int optlen) | |
1da177e4 | 995 | { |
1da177e4 LT |
996 | switch(level) { |
997 | case SOL_RAW: | |
998 | break; | |
999 | ||
1000 | case SOL_ICMPV6: | |
1001 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1002 | return -EOPNOTSUPP; | |
3fdadf7d | 1003 | return rawv6_seticmpfilter(sk, level, optname, optval, |
1da177e4 LT |
1004 | optlen); |
1005 | case SOL_IPV6: | |
1006 | if (optname == IPV6_CHECKSUM) | |
1007 | break; | |
1008 | default: | |
3fdadf7d | 1009 | return ipv6_setsockopt(sk, level, optname, optval, |
1da177e4 | 1010 | optlen); |
3ff50b79 SH |
1011 | } |
1012 | ||
3fdadf7d DM |
1013 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1014 | } | |
1015 | ||
1016 | #ifdef CONFIG_COMPAT | |
1017 | static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1018 | char __user *optval, int optlen) |
3fdadf7d | 1019 | { |
543d9cfe ACM |
1020 | switch (level) { |
1021 | case SOL_RAW: | |
1022 | break; | |
1023 | case SOL_ICMPV6: | |
1024 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1025 | return -EOPNOTSUPP; | |
1026 | return rawv6_seticmpfilter(sk, level, optname, optval, optlen); | |
1027 | case SOL_IPV6: | |
1028 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1029 | break; |
543d9cfe ACM |
1030 | default: |
1031 | return compat_ipv6_setsockopt(sk, level, optname, | |
1032 | optval, optlen); | |
3ff50b79 | 1033 | } |
3fdadf7d DM |
1034 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1035 | } | |
1036 | #endif | |
1037 | ||
1038 | static int do_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
1039 | char __user *optval, int __user *optlen) | |
1040 | { | |
1041 | struct raw6_sock *rp = raw6_sk(sk); | |
1042 | int val, len; | |
1da177e4 LT |
1043 | |
1044 | if (get_user(len,optlen)) | |
1045 | return -EFAULT; | |
1046 | ||
1047 | switch (optname) { | |
1048 | case IPV6_CHECKSUM: | |
1049 | if (rp->checksum == 0) | |
1050 | val = -1; | |
1051 | else | |
1052 | val = rp->offset; | |
1053 | break; | |
1054 | ||
1055 | default: | |
1056 | return -ENOPROTOOPT; | |
1057 | } | |
1058 | ||
1059 | len = min_t(unsigned int, sizeof(int), len); | |
1060 | ||
1061 | if (put_user(len, optlen)) | |
1062 | return -EFAULT; | |
1063 | if (copy_to_user(optval,&val,len)) | |
1064 | return -EFAULT; | |
1065 | return 0; | |
1066 | } | |
1067 | ||
3fdadf7d DM |
1068 | static int rawv6_getsockopt(struct sock *sk, int level, int optname, |
1069 | char __user *optval, int __user *optlen) | |
1070 | { | |
1071 | switch(level) { | |
1072 | case SOL_RAW: | |
1073 | break; | |
1074 | ||
1075 | case SOL_ICMPV6: | |
1076 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1077 | return -EOPNOTSUPP; | |
1078 | return rawv6_geticmpfilter(sk, level, optname, optval, | |
1079 | optlen); | |
1080 | case SOL_IPV6: | |
1081 | if (optname == IPV6_CHECKSUM) | |
1082 | break; | |
1083 | default: | |
1084 | return ipv6_getsockopt(sk, level, optname, optval, | |
1085 | optlen); | |
3ff50b79 SH |
1086 | } |
1087 | ||
3fdadf7d DM |
1088 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1089 | } | |
1090 | ||
1091 | #ifdef CONFIG_COMPAT | |
1092 | static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1093 | char __user *optval, int __user *optlen) |
3fdadf7d | 1094 | { |
543d9cfe ACM |
1095 | switch (level) { |
1096 | case SOL_RAW: | |
1097 | break; | |
1098 | case SOL_ICMPV6: | |
1099 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1100 | return -EOPNOTSUPP; | |
1101 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); | |
1102 | case SOL_IPV6: | |
1103 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1104 | break; |
543d9cfe ACM |
1105 | default: |
1106 | return compat_ipv6_getsockopt(sk, level, optname, | |
1107 | optval, optlen); | |
3ff50b79 | 1108 | } |
3fdadf7d DM |
1109 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1110 | } | |
1111 | #endif | |
1112 | ||
1da177e4 LT |
1113 | static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) |
1114 | { | |
1115 | switch(cmd) { | |
1116 | case SIOCOUTQ: | |
1117 | { | |
1118 | int amount = atomic_read(&sk->sk_wmem_alloc); | |
1119 | return put_user(amount, (int __user *)arg); | |
1120 | } | |
1121 | case SIOCINQ: | |
1122 | { | |
1123 | struct sk_buff *skb; | |
1124 | int amount = 0; | |
1125 | ||
e0f9f858 | 1126 | spin_lock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1127 | skb = skb_peek(&sk->sk_receive_queue); |
1128 | if (skb != NULL) | |
27a884dc | 1129 | amount = skb->tail - skb->transport_header; |
e0f9f858 | 1130 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1131 | return put_user(amount, (int __user *)arg); |
1132 | } | |
1133 | ||
1134 | default: | |
7bc570c8 YH |
1135 | #ifdef CONFIG_IPV6_MROUTE |
1136 | return ip6mr_ioctl(sk, cmd, (void __user *)arg); | |
1137 | #else | |
1da177e4 | 1138 | return -ENOIOCTLCMD; |
7bc570c8 | 1139 | #endif |
1da177e4 LT |
1140 | } |
1141 | } | |
1142 | ||
1143 | static void rawv6_close(struct sock *sk, long timeout) | |
1144 | { | |
1145 | if (inet_sk(sk)->num == IPPROTO_RAW) | |
1146 | ip6_ra_control(sk, -1, NULL); | |
7bc570c8 | 1147 | ip6mr_sk_done(sk); |
1da177e4 LT |
1148 | sk_common_release(sk); |
1149 | } | |
1150 | ||
1151 | static int rawv6_init_sk(struct sock *sk) | |
1152 | { | |
f48d5ff1 MN |
1153 | struct raw6_sock *rp = raw6_sk(sk); |
1154 | ||
1155 | switch (inet_sk(sk)->num) { | |
1156 | case IPPROTO_ICMPV6: | |
1da177e4 LT |
1157 | rp->checksum = 1; |
1158 | rp->offset = 2; | |
f48d5ff1 MN |
1159 | break; |
1160 | case IPPROTO_MH: | |
1161 | rp->checksum = 1; | |
1162 | rp->offset = 4; | |
1163 | break; | |
1164 | default: | |
1165 | break; | |
1da177e4 LT |
1166 | } |
1167 | return(0); | |
1168 | } | |
1169 | ||
1170 | struct proto rawv6_prot = { | |
543d9cfe ACM |
1171 | .name = "RAWv6", |
1172 | .owner = THIS_MODULE, | |
1173 | .close = rawv6_close, | |
1174 | .connect = ip6_datagram_connect, | |
1175 | .disconnect = udp_disconnect, | |
1176 | .ioctl = rawv6_ioctl, | |
1177 | .init = rawv6_init_sk, | |
1178 | .destroy = inet6_destroy_sock, | |
1179 | .setsockopt = rawv6_setsockopt, | |
1180 | .getsockopt = rawv6_getsockopt, | |
1181 | .sendmsg = rawv6_sendmsg, | |
1182 | .recvmsg = rawv6_recvmsg, | |
1183 | .bind = rawv6_bind, | |
1184 | .backlog_rcv = rawv6_rcv_skb, | |
fc8717ba PE |
1185 | .hash = raw_hash_sk, |
1186 | .unhash = raw_unhash_sk, | |
543d9cfe | 1187 | .obj_size = sizeof(struct raw6_sock), |
fc8717ba | 1188 | .h.raw_hash = &raw_v6_hashinfo, |
3fdadf7d | 1189 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1190 | .compat_setsockopt = compat_rawv6_setsockopt, |
1191 | .compat_getsockopt = compat_rawv6_getsockopt, | |
3fdadf7d | 1192 | #endif |
1da177e4 LT |
1193 | }; |
1194 | ||
1195 | #ifdef CONFIG_PROC_FS | |
1da177e4 LT |
1196 | static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) |
1197 | { | |
1198 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1199 | struct in6_addr *dest, *src; | |
1200 | __u16 destp, srcp; | |
1201 | ||
1202 | dest = &np->daddr; | |
1203 | src = &np->rcv_saddr; | |
1204 | destp = 0; | |
1205 | srcp = inet_sk(sp)->num; | |
1206 | seq_printf(seq, | |
1207 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
a92aa318 | 1208 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1da177e4 LT |
1209 | i, |
1210 | src->s6_addr32[0], src->s6_addr32[1], | |
1211 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1212 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1213 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1214 | sp->sk_state, |
1da177e4 LT |
1215 | atomic_read(&sp->sk_wmem_alloc), |
1216 | atomic_read(&sp->sk_rmem_alloc), | |
1217 | 0, 0L, 0, | |
1218 | sock_i_uid(sp), 0, | |
1219 | sock_i_ino(sp), | |
a92aa318 | 1220 | atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); |
1da177e4 LT |
1221 | } |
1222 | ||
1223 | static int raw6_seq_show(struct seq_file *seq, void *v) | |
1224 | { | |
1225 | if (v == SEQ_START_TOKEN) | |
1226 | seq_printf(seq, | |
1227 | " sl " | |
1228 | "local_address " | |
1229 | "remote_address " | |
1230 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
a92aa318 | 1231 | " uid timeout inode drops\n"); |
1da177e4 | 1232 | else |
42a73808 | 1233 | raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); |
1da177e4 LT |
1234 | return 0; |
1235 | } | |
1236 | ||
56b3d975 | 1237 | static const struct seq_operations raw6_seq_ops = { |
42a73808 PE |
1238 | .start = raw_seq_start, |
1239 | .next = raw_seq_next, | |
1240 | .stop = raw_seq_stop, | |
1da177e4 LT |
1241 | .show = raw6_seq_show, |
1242 | }; | |
1243 | ||
1244 | static int raw6_seq_open(struct inode *inode, struct file *file) | |
1245 | { | |
3046d767 | 1246 | return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops); |
1da177e4 LT |
1247 | } |
1248 | ||
9a32144e | 1249 | static const struct file_operations raw6_seq_fops = { |
1da177e4 LT |
1250 | .owner = THIS_MODULE, |
1251 | .open = raw6_seq_open, | |
1252 | .read = seq_read, | |
1253 | .llseek = seq_lseek, | |
f51d599f | 1254 | .release = seq_release_net, |
1da177e4 LT |
1255 | }; |
1256 | ||
a308da16 | 1257 | static int raw6_init_net(struct net *net) |
1da177e4 | 1258 | { |
a308da16 | 1259 | if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops)) |
1da177e4 | 1260 | return -ENOMEM; |
a308da16 | 1261 | |
1da177e4 LT |
1262 | return 0; |
1263 | } | |
1264 | ||
a308da16 PE |
1265 | static void raw6_exit_net(struct net *net) |
1266 | { | |
1267 | proc_net_remove(net, "raw6"); | |
1268 | } | |
1269 | ||
1270 | static struct pernet_operations raw6_net_ops = { | |
1271 | .init = raw6_init_net, | |
1272 | .exit = raw6_exit_net, | |
1273 | }; | |
1274 | ||
1275 | int __init raw6_proc_init(void) | |
1276 | { | |
1277 | return register_pernet_subsys(&raw6_net_ops); | |
1278 | } | |
1279 | ||
1da177e4 LT |
1280 | void raw6_proc_exit(void) |
1281 | { | |
a308da16 | 1282 | unregister_pernet_subsys(&raw6_net_ops); |
1da177e4 LT |
1283 | } |
1284 | #endif /* CONFIG_PROC_FS */ | |
7f4e4868 DL |
1285 | |
1286 | /* Same as inet6_dgram_ops, sans udp_poll. */ | |
1287 | static const struct proto_ops inet6_sockraw_ops = { | |
1288 | .family = PF_INET6, | |
1289 | .owner = THIS_MODULE, | |
1290 | .release = inet6_release, | |
1291 | .bind = inet6_bind, | |
1292 | .connect = inet_dgram_connect, /* ok */ | |
1293 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
1294 | .accept = sock_no_accept, /* a do nothing */ | |
1295 | .getname = inet6_getname, | |
1296 | .poll = datagram_poll, /* ok */ | |
1297 | .ioctl = inet6_ioctl, /* must change */ | |
1298 | .listen = sock_no_listen, /* ok */ | |
1299 | .shutdown = inet_shutdown, /* ok */ | |
1300 | .setsockopt = sock_common_setsockopt, /* ok */ | |
1301 | .getsockopt = sock_common_getsockopt, /* ok */ | |
1302 | .sendmsg = inet_sendmsg, /* ok */ | |
1303 | .recvmsg = sock_common_recvmsg, /* ok */ | |
1304 | .mmap = sock_no_mmap, | |
1305 | .sendpage = sock_no_sendpage, | |
1306 | #ifdef CONFIG_COMPAT | |
1307 | .compat_setsockopt = compat_sock_common_setsockopt, | |
1308 | .compat_getsockopt = compat_sock_common_getsockopt, | |
1309 | #endif | |
1310 | }; | |
1311 | ||
1312 | static struct inet_protosw rawv6_protosw = { | |
1313 | .type = SOCK_RAW, | |
1314 | .protocol = IPPROTO_IP, /* wild card */ | |
1315 | .prot = &rawv6_prot, | |
1316 | .ops = &inet6_sockraw_ops, | |
1317 | .capability = CAP_NET_RAW, | |
1318 | .no_check = UDP_CSUM_DEFAULT, | |
1319 | .flags = INET_PROTOSW_REUSE, | |
1320 | }; | |
1321 | ||
1322 | int __init rawv6_init(void) | |
1323 | { | |
1324 | int ret; | |
1325 | ||
1326 | ret = inet6_register_protosw(&rawv6_protosw); | |
1327 | if (ret) | |
1328 | goto out; | |
1329 | out: | |
1330 | return ret; | |
1331 | } | |
1332 | ||
09f7709f | 1333 | void rawv6_exit(void) |
7f4e4868 DL |
1334 | { |
1335 | inet6_unregister_protosw(&rawv6_protosw); | |
1336 | } |