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Commit | Line | Data |
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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 PE |
64 | static struct raw_hashinfo raw_v6_hashinfo = { |
65 | .lock = __RW_LOCK_UNLOCKED(), | |
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 | ||
69d6da0b PE |
79 | static struct sock *__raw_v6_lookup(struct sock *sk, unsigned short num, |
80 | struct in6_addr *loc_addr, struct in6_addr *rmt_addr, int dif) | |
1da177e4 LT |
81 | { |
82 | struct hlist_node *node; | |
83 | int is_multicast = ipv6_addr_is_multicast(loc_addr); | |
84 | ||
85 | sk_for_each_from(sk, node) | |
86 | if (inet_sk(sk)->num == num) { | |
87 | struct ipv6_pinfo *np = inet6_sk(sk); | |
88 | ||
89 | if (!ipv6_addr_any(&np->daddr) && | |
90 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
91 | continue; | |
92 | ||
0bd1b59b AM |
93 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) |
94 | continue; | |
95 | ||
1da177e4 LT |
96 | if (!ipv6_addr_any(&np->rcv_saddr)) { |
97 | if (ipv6_addr_equal(&np->rcv_saddr, loc_addr)) | |
98 | goto found; | |
99 | if (is_multicast && | |
100 | inet6_mc_check(sk, loc_addr, rmt_addr)) | |
101 | goto found; | |
102 | continue; | |
103 | } | |
104 | goto found; | |
105 | } | |
106 | sk = NULL; | |
107 | found: | |
108 | return sk; | |
109 | } | |
110 | ||
111 | /* | |
112 | * 0 - deliver | |
113 | * 1 - block | |
114 | */ | |
115 | static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb) | |
116 | { | |
117 | struct icmp6hdr *icmph; | |
118 | struct raw6_sock *rp = raw6_sk(sk); | |
119 | ||
120 | if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) { | |
121 | __u32 *data = &rp->filter.data[0]; | |
122 | int bit_nr; | |
123 | ||
124 | icmph = (struct icmp6hdr *) skb->data; | |
125 | bit_nr = icmph->icmp6_type; | |
126 | ||
127 | return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0; | |
128 | } | |
129 | return 0; | |
130 | } | |
131 | ||
59fbb3a6 MN |
132 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
133 | static int (*mh_filter)(struct sock *sock, struct sk_buff *skb); | |
134 | ||
135 | int rawv6_mh_filter_register(int (*filter)(struct sock *sock, | |
136 | struct sk_buff *skb)) | |
137 | { | |
138 | rcu_assign_pointer(mh_filter, filter); | |
139 | return 0; | |
140 | } | |
141 | EXPORT_SYMBOL(rawv6_mh_filter_register); | |
142 | ||
143 | int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock, | |
144 | struct sk_buff *skb)) | |
145 | { | |
146 | rcu_assign_pointer(mh_filter, NULL); | |
147 | synchronize_rcu(); | |
148 | return 0; | |
149 | } | |
150 | EXPORT_SYMBOL(rawv6_mh_filter_unregister); | |
151 | ||
152 | #endif | |
153 | ||
1da177e4 LT |
154 | /* |
155 | * demultiplex raw sockets. | |
156 | * (should consider queueing the skb in the sock receive_queue | |
157 | * without calling rawv6.c) | |
158 | * | |
159 | * Caller owns SKB so we must make clones. | |
160 | */ | |
69d6da0b | 161 | static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) |
1da177e4 LT |
162 | { |
163 | struct in6_addr *saddr; | |
164 | struct in6_addr *daddr; | |
165 | struct sock *sk; | |
d13964f4 | 166 | int delivered = 0; |
1da177e4 LT |
167 | __u8 hash; |
168 | ||
0660e03f | 169 | saddr = &ipv6_hdr(skb)->saddr; |
1da177e4 LT |
170 | daddr = saddr + 1; |
171 | ||
172 | hash = nexthdr & (MAX_INET_PROTOS - 1); | |
173 | ||
b673e4df PE |
174 | read_lock(&raw_v6_hashinfo.lock); |
175 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
1da177e4 LT |
176 | |
177 | /* | |
178 | * The first socket found will be delivered after | |
179 | * delivery to transport protocols. | |
180 | */ | |
181 | ||
182 | if (sk == NULL) | |
183 | goto out; | |
184 | ||
2dac4b96 | 185 | sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr, IP6CB(skb)->iif); |
1da177e4 LT |
186 | |
187 | while (sk) { | |
7be96f76 MN |
188 | int filtered; |
189 | ||
d13964f4 | 190 | delivered = 1; |
7be96f76 MN |
191 | switch (nexthdr) { |
192 | case IPPROTO_ICMPV6: | |
193 | filtered = icmpv6_filter(sk, skb); | |
194 | break; | |
59fbb3a6 MN |
195 | |
196 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) | |
7be96f76 | 197 | case IPPROTO_MH: |
59fbb3a6 | 198 | { |
7be96f76 MN |
199 | /* XXX: To validate MH only once for each packet, |
200 | * this is placed here. It should be after checking | |
201 | * xfrm policy, however it doesn't. The checking xfrm | |
202 | * policy is placed in rawv6_rcv() because it is | |
203 | * required for each socket. | |
204 | */ | |
59fbb3a6 MN |
205 | int (*filter)(struct sock *sock, struct sk_buff *skb); |
206 | ||
207 | filter = rcu_dereference(mh_filter); | |
208 | filtered = filter ? filter(sk, skb) : 0; | |
7be96f76 | 209 | break; |
59fbb3a6 | 210 | } |
7be96f76 MN |
211 | #endif |
212 | default: | |
213 | filtered = 0; | |
214 | break; | |
215 | } | |
216 | ||
217 | if (filtered < 0) | |
218 | break; | |
219 | if (filtered == 0) { | |
1da177e4 LT |
220 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); |
221 | ||
222 | /* Not releasing hash table! */ | |
9fb9cbb1 YK |
223 | if (clone) { |
224 | nf_reset(clone); | |
1da177e4 | 225 | rawv6_rcv(sk, clone); |
9fb9cbb1 | 226 | } |
1da177e4 | 227 | } |
0bd1b59b | 228 | sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr, |
2dac4b96 | 229 | IP6CB(skb)->iif); |
1da177e4 LT |
230 | } |
231 | out: | |
b673e4df | 232 | read_unlock(&raw_v6_hashinfo.lock); |
d13964f4 | 233 | return delivered; |
1da177e4 LT |
234 | } |
235 | ||
69d6da0b PE |
236 | int raw6_local_deliver(struct sk_buff *skb, int nexthdr) |
237 | { | |
238 | struct sock *raw_sk; | |
239 | ||
b673e4df | 240 | raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]); |
69d6da0b PE |
241 | if (raw_sk && !ipv6_raw_deliver(skb, nexthdr)) |
242 | raw_sk = NULL; | |
243 | ||
244 | return raw_sk != NULL; | |
245 | } | |
246 | ||
1da177e4 LT |
247 | /* This cleans up af_inet6 a bit. -DaveM */ |
248 | static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
249 | { | |
250 | struct inet_sock *inet = inet_sk(sk); | |
251 | struct ipv6_pinfo *np = inet6_sk(sk); | |
252 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; | |
e69a4adc | 253 | __be32 v4addr = 0; |
1da177e4 LT |
254 | int addr_type; |
255 | int err; | |
256 | ||
257 | if (addr_len < SIN6_LEN_RFC2133) | |
258 | return -EINVAL; | |
259 | addr_type = ipv6_addr_type(&addr->sin6_addr); | |
260 | ||
261 | /* Raw sockets are IPv6 only */ | |
262 | if (addr_type == IPV6_ADDR_MAPPED) | |
263 | return(-EADDRNOTAVAIL); | |
264 | ||
265 | lock_sock(sk); | |
266 | ||
267 | err = -EINVAL; | |
268 | if (sk->sk_state != TCP_CLOSE) | |
269 | goto out; | |
270 | ||
271 | /* Check if the address belongs to the host. */ | |
272 | if (addr_type != IPV6_ADDR_ANY) { | |
273 | struct net_device *dev = NULL; | |
274 | ||
275 | if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
276 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
277 | addr->sin6_scope_id) { | |
278 | /* Override any existing binding, if another | |
279 | * one is supplied by user. | |
280 | */ | |
281 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
282 | } | |
1ab1457c | 283 | |
1da177e4 LT |
284 | /* Binding to link-local address requires an interface */ |
285 | if (!sk->sk_bound_dev_if) | |
286 | goto out; | |
287 | ||
881d966b | 288 | dev = dev_get_by_index(&init_net, sk->sk_bound_dev_if); |
1da177e4 LT |
289 | if (!dev) { |
290 | err = -ENODEV; | |
291 | goto out; | |
292 | } | |
293 | } | |
1ab1457c | 294 | |
1da177e4 LT |
295 | /* ipv4 addr of the socket is invalid. Only the |
296 | * unspecified and mapped address have a v4 equivalent. | |
297 | */ | |
298 | v4addr = LOOPBACK4_IPV6; | |
299 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
300 | err = -EADDRNOTAVAIL; | |
301 | if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) { | |
302 | if (dev) | |
303 | dev_put(dev); | |
304 | goto out; | |
305 | } | |
306 | } | |
307 | if (dev) | |
308 | dev_put(dev); | |
309 | } | |
310 | ||
311 | inet->rcv_saddr = inet->saddr = v4addr; | |
312 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); | |
313 | if (!(addr_type & IPV6_ADDR_MULTICAST)) | |
314 | ipv6_addr_copy(&np->saddr, &addr->sin6_addr); | |
315 | err = 0; | |
316 | out: | |
317 | release_sock(sk); | |
318 | return err; | |
319 | } | |
320 | ||
69d6da0b | 321 | static void rawv6_err(struct sock *sk, struct sk_buff *skb, |
1da177e4 | 322 | struct inet6_skb_parm *opt, |
04ce6909 | 323 | int type, int code, int offset, __be32 info) |
1da177e4 LT |
324 | { |
325 | struct inet_sock *inet = inet_sk(sk); | |
326 | struct ipv6_pinfo *np = inet6_sk(sk); | |
327 | int err; | |
328 | int harderr; | |
329 | ||
330 | /* Report error on raw socket, if: | |
331 | 1. User requested recverr. | |
332 | 2. Socket is connected (otherwise the error indication | |
333 | is useless without recverr and error is hard. | |
334 | */ | |
335 | if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) | |
336 | return; | |
337 | ||
338 | harderr = icmpv6_err_convert(type, code, &err); | |
339 | if (type == ICMPV6_PKT_TOOBIG) | |
340 | harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); | |
341 | ||
342 | if (np->recverr) { | |
343 | u8 *payload = skb->data; | |
344 | if (!inet->hdrincl) | |
345 | payload += offset; | |
346 | ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); | |
347 | } | |
348 | ||
349 | if (np->recverr || harderr) { | |
350 | sk->sk_err = err; | |
351 | sk->sk_error_report(sk); | |
352 | } | |
353 | } | |
354 | ||
69d6da0b PE |
355 | void raw6_icmp_error(struct sk_buff *skb, int nexthdr, |
356 | int type, int code, int inner_offset, __be32 info) | |
357 | { | |
358 | struct sock *sk; | |
359 | int hash; | |
360 | struct in6_addr *saddr, *daddr; | |
361 | ||
b673e4df | 362 | hash = nexthdr & (RAW_HTABLE_SIZE - 1); |
69d6da0b | 363 | |
b673e4df PE |
364 | read_lock(&raw_v6_hashinfo.lock); |
365 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
69d6da0b PE |
366 | if (sk != NULL) { |
367 | saddr = &ipv6_hdr(skb)->saddr; | |
368 | daddr = &ipv6_hdr(skb)->daddr; | |
369 | ||
370 | while ((sk = __raw_v6_lookup(sk, nexthdr, saddr, daddr, | |
371 | IP6CB(skb)->iif))) { | |
372 | rawv6_err(sk, skb, NULL, type, code, | |
373 | inner_offset, info); | |
374 | sk = sk_next(sk); | |
375 | } | |
376 | } | |
b673e4df | 377 | read_unlock(&raw_v6_hashinfo.lock); |
69d6da0b PE |
378 | } |
379 | ||
1da177e4 LT |
380 | static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb) |
381 | { | |
1ab1457c | 382 | if ((raw6_sk(sk)->checksum || sk->sk_filter) && |
fb286bb2 | 383 | skb_checksum_complete(skb)) { |
a92aa318 | 384 | atomic_inc(&sk->sk_drops); |
fb286bb2 HX |
385 | kfree_skb(skb); |
386 | return 0; | |
1da177e4 LT |
387 | } |
388 | ||
389 | /* Charge it to the socket. */ | |
390 | if (sock_queue_rcv_skb(sk,skb)<0) { | |
a92aa318 | 391 | atomic_inc(&sk->sk_drops); |
1da177e4 LT |
392 | kfree_skb(skb); |
393 | return 0; | |
394 | } | |
395 | ||
396 | return 0; | |
397 | } | |
398 | ||
399 | /* | |
1ab1457c | 400 | * This is next to useless... |
1da177e4 | 401 | * if we demultiplex in network layer we don't need the extra call |
1ab1457c YH |
402 | * just to queue the skb... |
403 | * maybe we could have the network decide upon a hint if it | |
1da177e4 LT |
404 | * should call raw_rcv for demultiplexing |
405 | */ | |
406 | int rawv6_rcv(struct sock *sk, struct sk_buff *skb) | |
407 | { | |
408 | struct inet_sock *inet = inet_sk(sk); | |
409 | struct raw6_sock *rp = raw6_sk(sk); | |
410 | ||
1ab1457c | 411 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { |
a92aa318 | 412 | atomic_inc(&sk->sk_drops); |
1ab1457c YH |
413 | kfree_skb(skb); |
414 | return NET_RX_DROP; | |
415 | } | |
1da177e4 LT |
416 | |
417 | if (!rp->checksum) | |
418 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
419 | ||
84fa7933 | 420 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
d56f90a7 | 421 | skb_postpull_rcsum(skb, skb_network_header(skb), |
cfe1fc77 | 422 | skb_network_header_len(skb)); |
0660e03f ACM |
423 | if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
424 | &ipv6_hdr(skb)->daddr, | |
fb286bb2 | 425 | skb->len, inet->num, skb->csum)) |
1da177e4 | 426 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1da177e4 | 427 | } |
60476372 | 428 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
429 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
430 | &ipv6_hdr(skb)->daddr, | |
431 | skb->len, | |
432 | inet->num, 0)); | |
1da177e4 LT |
433 | |
434 | if (inet->hdrincl) { | |
fb286bb2 | 435 | if (skb_checksum_complete(skb)) { |
a92aa318 | 436 | atomic_inc(&sk->sk_drops); |
1da177e4 LT |
437 | kfree_skb(skb); |
438 | return 0; | |
439 | } | |
1da177e4 LT |
440 | } |
441 | ||
442 | rawv6_rcv_skb(sk, skb); | |
443 | return 0; | |
444 | } | |
445 | ||
446 | ||
447 | /* | |
448 | * This should be easy, if there is something there | |
449 | * we return it, otherwise we block. | |
450 | */ | |
451 | ||
452 | static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk, | |
453 | struct msghdr *msg, size_t len, | |
454 | int noblock, int flags, int *addr_len) | |
455 | { | |
456 | struct ipv6_pinfo *np = inet6_sk(sk); | |
457 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name; | |
458 | struct sk_buff *skb; | |
459 | size_t copied; | |
460 | int err; | |
461 | ||
462 | if (flags & MSG_OOB) | |
463 | return -EOPNOTSUPP; | |
1ab1457c YH |
464 | |
465 | if (addr_len) | |
1da177e4 LT |
466 | *addr_len=sizeof(*sin6); |
467 | ||
468 | if (flags & MSG_ERRQUEUE) | |
469 | return ipv6_recv_error(sk, msg, len); | |
470 | ||
471 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
472 | if (!skb) | |
473 | goto out; | |
474 | ||
475 | copied = skb->len; | |
1ab1457c YH |
476 | if (copied > len) { |
477 | copied = len; | |
478 | msg->msg_flags |= MSG_TRUNC; | |
479 | } | |
1da177e4 | 480 | |
60476372 | 481 | if (skb_csum_unnecessary(skb)) { |
1da177e4 LT |
482 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
483 | } else if (msg->msg_flags&MSG_TRUNC) { | |
fb286bb2 | 484 | if (__skb_checksum_complete(skb)) |
1da177e4 LT |
485 | goto csum_copy_err; |
486 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
487 | } else { | |
488 | err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov); | |
489 | if (err == -EINVAL) | |
490 | goto csum_copy_err; | |
491 | } | |
492 | if (err) | |
493 | goto out_free; | |
494 | ||
495 | /* Copy the address. */ | |
496 | if (sin6) { | |
497 | sin6->sin6_family = AF_INET6; | |
f59fc7f3 | 498 | sin6->sin6_port = 0; |
0660e03f | 499 | ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr); |
1da177e4 LT |
500 | sin6->sin6_flowinfo = 0; |
501 | sin6->sin6_scope_id = 0; | |
502 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
503 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
504 | } | |
505 | ||
506 | sock_recv_timestamp(msg, sk, skb); | |
507 | ||
508 | if (np->rxopt.all) | |
509 | datagram_recv_ctl(sk, msg, skb); | |
510 | ||
511 | err = copied; | |
512 | if (flags & MSG_TRUNC) | |
513 | err = skb->len; | |
514 | ||
515 | out_free: | |
516 | skb_free_datagram(sk, skb); | |
517 | out: | |
518 | return err; | |
519 | ||
520 | csum_copy_err: | |
3305b80c | 521 | skb_kill_datagram(sk, skb, flags); |
1da177e4 LT |
522 | |
523 | /* Error for blocking case is chosen to masquerade | |
524 | as some normal condition. | |
525 | */ | |
526 | err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; | |
a92aa318 | 527 | atomic_inc(&sk->sk_drops); |
3305b80c | 528 | goto out; |
1da177e4 LT |
529 | } |
530 | ||
531 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl, | |
357b40a1 | 532 | struct raw6_sock *rp) |
1da177e4 LT |
533 | { |
534 | struct sk_buff *skb; | |
535 | int err = 0; | |
357b40a1 HX |
536 | int offset; |
537 | int len; | |
679a8738 | 538 | int total_len; |
868c86bc AV |
539 | __wsum tmp_csum; |
540 | __sum16 csum; | |
1da177e4 LT |
541 | |
542 | if (!rp->checksum) | |
543 | goto send; | |
544 | ||
545 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
546 | goto out; | |
547 | ||
357b40a1 | 548 | offset = rp->offset; |
d56f90a7 ACM |
549 | total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) - |
550 | skb->data); | |
679a8738 | 551 | if (offset >= total_len - 1) { |
1da177e4 | 552 | err = -EINVAL; |
357b40a1 | 553 | ip6_flush_pending_frames(sk); |
1da177e4 LT |
554 | goto out; |
555 | } | |
556 | ||
557 | /* should be check HW csum miyazawa */ | |
558 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
559 | /* | |
560 | * Only one fragment on the socket. | |
561 | */ | |
562 | tmp_csum = skb->csum; | |
563 | } else { | |
357b40a1 | 564 | struct sk_buff *csum_skb = NULL; |
1da177e4 LT |
565 | tmp_csum = 0; |
566 | ||
567 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
568 | tmp_csum = csum_add(tmp_csum, skb->csum); | |
357b40a1 HX |
569 | |
570 | if (csum_skb) | |
571 | continue; | |
572 | ||
ea2ae17d | 573 | len = skb->len - skb_transport_offset(skb); |
357b40a1 HX |
574 | if (offset >= len) { |
575 | offset -= len; | |
576 | continue; | |
577 | } | |
578 | ||
579 | csum_skb = skb; | |
1da177e4 | 580 | } |
357b40a1 HX |
581 | |
582 | skb = csum_skb; | |
1da177e4 LT |
583 | } |
584 | ||
ea2ae17d | 585 | offset += skb_transport_offset(skb); |
357b40a1 HX |
586 | if (skb_copy_bits(skb, offset, &csum, 2)) |
587 | BUG(); | |
588 | ||
1da177e4 | 589 | /* in case cksum was not initialized */ |
357b40a1 | 590 | if (unlikely(csum)) |
5f92a738 | 591 | tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); |
357b40a1 | 592 | |
868c86bc | 593 | csum = csum_ipv6_magic(&fl->fl6_src, |
357b40a1 | 594 | &fl->fl6_dst, |
679a8738 | 595 | total_len, fl->proto, tmp_csum); |
357b40a1 | 596 | |
f6ab0288 AV |
597 | if (csum == 0 && fl->proto == IPPROTO_UDP) |
598 | csum = CSUM_MANGLED_0; | |
1da177e4 | 599 | |
357b40a1 HX |
600 | if (skb_store_bits(skb, offset, &csum, 2)) |
601 | BUG(); | |
1da177e4 | 602 | |
1da177e4 LT |
603 | send: |
604 | err = ip6_push_pending_frames(sk); | |
605 | out: | |
606 | return err; | |
607 | } | |
608 | ||
609 | static int rawv6_send_hdrinc(struct sock *sk, void *from, int length, | |
1ab1457c | 610 | struct flowi *fl, struct rt6_info *rt, |
1da177e4 LT |
611 | unsigned int flags) |
612 | { | |
3320da89 | 613 | struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 LT |
614 | struct ipv6hdr *iph; |
615 | struct sk_buff *skb; | |
616 | unsigned int hh_len; | |
617 | int err; | |
618 | ||
619 | if (length > rt->u.dst.dev->mtu) { | |
620 | ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu); | |
621 | return -EMSGSIZE; | |
622 | } | |
623 | if (flags&MSG_PROBE) | |
624 | goto out; | |
625 | ||
626 | hh_len = LL_RESERVED_SPACE(rt->u.dst.dev); | |
627 | ||
628 | skb = sock_alloc_send_skb(sk, length+hh_len+15, | |
629 | flags&MSG_DONTWAIT, &err); | |
630 | if (skb == NULL) | |
1ab1457c | 631 | goto error; |
1da177e4 LT |
632 | skb_reserve(skb, hh_len); |
633 | ||
634 | skb->priority = sk->sk_priority; | |
635 | skb->dst = dst_clone(&rt->u.dst); | |
636 | ||
1ced98e8 ACM |
637 | skb_put(skb, length); |
638 | skb_reset_network_header(skb); | |
0660e03f | 639 | iph = ipv6_hdr(skb); |
1da177e4 LT |
640 | |
641 | skb->ip_summed = CHECKSUM_NONE; | |
642 | ||
b0e380b1 | 643 | skb->transport_header = skb->network_header; |
1da177e4 LT |
644 | err = memcpy_fromiovecend((void *)iph, from, 0, length); |
645 | if (err) | |
646 | goto error_fault; | |
647 | ||
a11d206d | 648 | IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS); |
6e23ae2a | 649 | err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev, |
1da177e4 LT |
650 | dst_output); |
651 | if (err > 0) | |
3320da89 | 652 | err = np->recverr ? net_xmit_errno(err) : 0; |
1da177e4 LT |
653 | if (err) |
654 | goto error; | |
655 | out: | |
656 | return 0; | |
657 | ||
658 | error_fault: | |
659 | err = -EFAULT; | |
660 | kfree_skb(skb); | |
661 | error: | |
a11d206d | 662 | IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); |
1ab1457c | 663 | return err; |
1da177e4 LT |
664 | } |
665 | ||
a27b58fe | 666 | static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) |
1da177e4 LT |
667 | { |
668 | struct iovec *iov; | |
669 | u8 __user *type = NULL; | |
670 | u8 __user *code = NULL; | |
6e8f4d48 | 671 | u8 len = 0; |
1da177e4 LT |
672 | int probed = 0; |
673 | int i; | |
674 | ||
675 | if (!msg->msg_iov) | |
a27b58fe | 676 | return 0; |
1da177e4 LT |
677 | |
678 | for (i = 0; i < msg->msg_iovlen; i++) { | |
679 | iov = &msg->msg_iov[i]; | |
680 | if (!iov) | |
681 | continue; | |
682 | ||
683 | switch (fl->proto) { | |
684 | case IPPROTO_ICMPV6: | |
685 | /* check if one-byte field is readable or not. */ | |
686 | if (iov->iov_base && iov->iov_len < 1) | |
687 | break; | |
688 | ||
689 | if (!type) { | |
690 | type = iov->iov_base; | |
691 | /* check if code field is readable or not. */ | |
692 | if (iov->iov_len > 1) | |
693 | code = type + 1; | |
694 | } else if (!code) | |
695 | code = iov->iov_base; | |
696 | ||
697 | if (type && code) { | |
a27b58fe HC |
698 | if (get_user(fl->fl_icmp_type, type) || |
699 | get_user(fl->fl_icmp_code, code)) | |
700 | return -EFAULT; | |
1da177e4 LT |
701 | probed = 1; |
702 | } | |
703 | break; | |
6e8f4d48 MN |
704 | case IPPROTO_MH: |
705 | if (iov->iov_base && iov->iov_len < 1) | |
706 | break; | |
707 | /* check if type field is readable or not. */ | |
708 | if (iov->iov_len > 2 - len) { | |
709 | u8 __user *p = iov->iov_base; | |
a27b58fe HC |
710 | if (get_user(fl->fl_mh_type, &p[2 - len])) |
711 | return -EFAULT; | |
6e8f4d48 MN |
712 | probed = 1; |
713 | } else | |
714 | len += iov->iov_len; | |
715 | ||
716 | break; | |
1da177e4 LT |
717 | default: |
718 | probed = 1; | |
719 | break; | |
720 | } | |
721 | if (probed) | |
722 | break; | |
723 | } | |
a27b58fe | 724 | return 0; |
1da177e4 LT |
725 | } |
726 | ||
727 | static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, | |
728 | struct msghdr *msg, size_t len) | |
729 | { | |
730 | struct ipv6_txoptions opt_space; | |
731 | struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
732 | struct in6_addr *daddr, *final_p = NULL, final; | |
733 | struct inet_sock *inet = inet_sk(sk); | |
734 | struct ipv6_pinfo *np = inet6_sk(sk); | |
735 | struct raw6_sock *rp = raw6_sk(sk); | |
736 | struct ipv6_txoptions *opt = NULL; | |
737 | struct ip6_flowlabel *flowlabel = NULL; | |
738 | struct dst_entry *dst = NULL; | |
739 | struct flowi fl; | |
740 | int addr_len = msg->msg_namelen; | |
741 | int hlimit = -1; | |
41a1f8ea | 742 | int tclass = -1; |
1da177e4 LT |
743 | u16 proto; |
744 | int err; | |
745 | ||
746 | /* Rough check on arithmetic overflow, | |
b59e139b | 747 | better check is made in ip6_append_data(). |
1da177e4 | 748 | */ |
b59e139b | 749 | if (len > INT_MAX) |
1da177e4 LT |
750 | return -EMSGSIZE; |
751 | ||
752 | /* Mirror BSD error message compatibility */ | |
1ab1457c | 753 | if (msg->msg_flags & MSG_OOB) |
1da177e4 LT |
754 | return -EOPNOTSUPP; |
755 | ||
756 | /* | |
1ab1457c | 757 | * Get and verify the address. |
1da177e4 LT |
758 | */ |
759 | memset(&fl, 0, sizeof(fl)); | |
760 | ||
761 | if (sin6) { | |
1ab1457c | 762 | if (addr_len < SIN6_LEN_RFC2133) |
1da177e4 LT |
763 | return -EINVAL; |
764 | ||
1ab1457c | 765 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) |
1da177e4 LT |
766 | return(-EAFNOSUPPORT); |
767 | ||
768 | /* port is the proto value [0..255] carried in nexthdr */ | |
769 | proto = ntohs(sin6->sin6_port); | |
770 | ||
771 | if (!proto) | |
772 | proto = inet->num; | |
773 | else if (proto != inet->num) | |
774 | return(-EINVAL); | |
775 | ||
776 | if (proto > 255) | |
777 | return(-EINVAL); | |
778 | ||
779 | daddr = &sin6->sin6_addr; | |
780 | if (np->sndflow) { | |
781 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; | |
782 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
783 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
784 | if (flowlabel == NULL) | |
785 | return -EINVAL; | |
786 | daddr = &flowlabel->dst; | |
787 | } | |
788 | } | |
789 | ||
790 | /* | |
791 | * Otherwise it will be difficult to maintain | |
792 | * sk->sk_dst_cache. | |
793 | */ | |
794 | if (sk->sk_state == TCP_ESTABLISHED && | |
795 | ipv6_addr_equal(daddr, &np->daddr)) | |
796 | daddr = &np->daddr; | |
797 | ||
798 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
799 | sin6->sin6_scope_id && | |
800 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
801 | fl.oif = sin6->sin6_scope_id; | |
802 | } else { | |
1ab1457c | 803 | if (sk->sk_state != TCP_ESTABLISHED) |
1da177e4 | 804 | return -EDESTADDRREQ; |
1ab1457c | 805 | |
1da177e4 LT |
806 | proto = inet->num; |
807 | daddr = &np->daddr; | |
808 | fl.fl6_flowlabel = np->flow_label; | |
809 | } | |
810 | ||
811 | if (ipv6_addr_any(daddr)) { | |
1ab1457c YH |
812 | /* |
813 | * unspecified destination address | |
1da177e4 LT |
814 | * treated as error... is this correct ? |
815 | */ | |
816 | fl6_sock_release(flowlabel); | |
817 | return(-EINVAL); | |
818 | } | |
819 | ||
820 | if (fl.oif == 0) | |
821 | fl.oif = sk->sk_bound_dev_if; | |
822 | ||
823 | if (msg->msg_controllen) { | |
824 | opt = &opt_space; | |
825 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
826 | opt->tot_len = sizeof(struct ipv6_txoptions); | |
827 | ||
41a1f8ea | 828 | err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
829 | if (err < 0) { |
830 | fl6_sock_release(flowlabel); | |
831 | return err; | |
832 | } | |
833 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { | |
834 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
835 | if (flowlabel == NULL) | |
836 | return -EINVAL; | |
837 | } | |
838 | if (!(opt->opt_nflen|opt->opt_flen)) | |
839 | opt = NULL; | |
840 | } | |
841 | if (opt == NULL) | |
842 | opt = np->opt; | |
df9890c3 YH |
843 | if (flowlabel) |
844 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
845 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 LT |
846 | |
847 | fl.proto = proto; | |
a27b58fe HC |
848 | err = rawv6_probe_proto_opt(&fl, msg); |
849 | if (err) | |
850 | goto out; | |
1ab1457c | 851 | |
1da177e4 LT |
852 | ipv6_addr_copy(&fl.fl6_dst, daddr); |
853 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) | |
854 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
855 | ||
856 | /* merge ip6_build_xmit from ip6_output */ | |
857 | if (opt && opt->srcrt) { | |
858 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
859 | ipv6_addr_copy(&final, &fl.fl6_dst); | |
860 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
861 | final_p = &final; | |
862 | } | |
863 | ||
864 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) | |
865 | fl.oif = np->mcast_oif; | |
beb8d13b | 866 | security_sk_classify_flow(sk, &fl); |
1da177e4 LT |
867 | |
868 | err = ip6_dst_lookup(sk, &dst, &fl); | |
869 | if (err) | |
870 | goto out; | |
871 | if (final_p) | |
872 | ipv6_addr_copy(&fl.fl6_dst, final_p); | |
873 | ||
bb72845e | 874 | if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) { |
14e50e57 DM |
875 | if (err == -EREMOTE) |
876 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
877 | if (err < 0) | |
878 | goto out; | |
879 | } | |
1da177e4 LT |
880 | |
881 | if (hlimit < 0) { | |
882 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) | |
883 | hlimit = np->mcast_hops; | |
884 | else | |
885 | hlimit = np->hop_limit; | |
886 | if (hlimit < 0) | |
887 | hlimit = dst_metric(dst, RTAX_HOPLIMIT); | |
888 | if (hlimit < 0) | |
889 | hlimit = ipv6_get_hoplimit(dst->dev); | |
890 | } | |
891 | ||
41a1f8ea | 892 | if (tclass < 0) { |
e012d51c | 893 | tclass = np->tclass; |
41a1f8ea YH |
894 | if (tclass < 0) |
895 | tclass = 0; | |
896 | } | |
897 | ||
1da177e4 LT |
898 | if (msg->msg_flags&MSG_CONFIRM) |
899 | goto do_confirm; | |
900 | ||
901 | back_from_confirm: | |
902 | if (inet->hdrincl) { | |
903 | err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags); | |
904 | } else { | |
905 | lock_sock(sk); | |
41a1f8ea YH |
906 | err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, |
907 | len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst, | |
908 | msg->msg_flags); | |
1da177e4 LT |
909 | |
910 | if (err) | |
911 | ip6_flush_pending_frames(sk); | |
912 | else if (!(msg->msg_flags & MSG_MORE)) | |
357b40a1 | 913 | err = rawv6_push_pending_frames(sk, &fl, rp); |
3ef9d943 | 914 | release_sock(sk); |
1da177e4 LT |
915 | } |
916 | done: | |
6d3e85ec | 917 | dst_release(dst); |
1ab1457c | 918 | out: |
1da177e4 LT |
919 | fl6_sock_release(flowlabel); |
920 | return err<0?err:len; | |
921 | do_confirm: | |
922 | dst_confirm(dst); | |
923 | if (!(msg->msg_flags & MSG_PROBE) || len) | |
924 | goto back_from_confirm; | |
925 | err = 0; | |
926 | goto done; | |
927 | } | |
928 | ||
1ab1457c | 929 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
930 | char __user *optval, int optlen) |
931 | { | |
932 | switch (optname) { | |
933 | case ICMPV6_FILTER: | |
934 | if (optlen > sizeof(struct icmp6_filter)) | |
935 | optlen = sizeof(struct icmp6_filter); | |
936 | if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) | |
937 | return -EFAULT; | |
938 | return 0; | |
939 | default: | |
940 | return -ENOPROTOOPT; | |
3ff50b79 | 941 | } |
1da177e4 LT |
942 | |
943 | return 0; | |
944 | } | |
945 | ||
1ab1457c | 946 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
947 | char __user *optval, int __user *optlen) |
948 | { | |
949 | int len; | |
950 | ||
951 | switch (optname) { | |
952 | case ICMPV6_FILTER: | |
953 | if (get_user(len, optlen)) | |
954 | return -EFAULT; | |
955 | if (len < 0) | |
956 | return -EINVAL; | |
957 | if (len > sizeof(struct icmp6_filter)) | |
958 | len = sizeof(struct icmp6_filter); | |
959 | if (put_user(len, optlen)) | |
960 | return -EFAULT; | |
961 | if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) | |
962 | return -EFAULT; | |
963 | return 0; | |
964 | default: | |
965 | return -ENOPROTOOPT; | |
3ff50b79 | 966 | } |
1da177e4 LT |
967 | |
968 | return 0; | |
969 | } | |
970 | ||
971 | ||
3fdadf7d | 972 | static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
973 | char __user *optval, int optlen) |
974 | { | |
975 | struct raw6_sock *rp = raw6_sk(sk); | |
976 | int val; | |
977 | ||
1ab1457c | 978 | if (get_user(val, (int __user *)optval)) |
1da177e4 LT |
979 | return -EFAULT; |
980 | ||
981 | switch (optname) { | |
982 | case IPV6_CHECKSUM: | |
983 | /* You may get strange result with a positive odd offset; | |
984 | RFC2292bis agrees with me. */ | |
985 | if (val > 0 && (val&1)) | |
986 | return(-EINVAL); | |
987 | if (val < 0) { | |
988 | rp->checksum = 0; | |
989 | } else { | |
990 | rp->checksum = 1; | |
991 | rp->offset = val; | |
992 | } | |
993 | ||
994 | return 0; | |
995 | break; | |
996 | ||
997 | default: | |
998 | return(-ENOPROTOOPT); | |
999 | } | |
1000 | } | |
1001 | ||
3fdadf7d DM |
1002 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, |
1003 | char __user *optval, int optlen) | |
1da177e4 | 1004 | { |
1da177e4 LT |
1005 | switch(level) { |
1006 | case SOL_RAW: | |
1007 | break; | |
1008 | ||
1009 | case SOL_ICMPV6: | |
1010 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1011 | return -EOPNOTSUPP; | |
3fdadf7d | 1012 | return rawv6_seticmpfilter(sk, level, optname, optval, |
1da177e4 LT |
1013 | optlen); |
1014 | case SOL_IPV6: | |
1015 | if (optname == IPV6_CHECKSUM) | |
1016 | break; | |
1017 | default: | |
3fdadf7d | 1018 | return ipv6_setsockopt(sk, level, optname, optval, |
1da177e4 | 1019 | optlen); |
3ff50b79 SH |
1020 | } |
1021 | ||
3fdadf7d DM |
1022 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1023 | } | |
1024 | ||
1025 | #ifdef CONFIG_COMPAT | |
1026 | static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1027 | char __user *optval, int optlen) |
3fdadf7d | 1028 | { |
543d9cfe ACM |
1029 | switch (level) { |
1030 | case SOL_RAW: | |
1031 | break; | |
1032 | case SOL_ICMPV6: | |
1033 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1034 | return -EOPNOTSUPP; | |
1035 | return rawv6_seticmpfilter(sk, level, optname, optval, optlen); | |
1036 | case SOL_IPV6: | |
1037 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1038 | break; |
543d9cfe ACM |
1039 | default: |
1040 | return compat_ipv6_setsockopt(sk, level, optname, | |
1041 | optval, optlen); | |
3ff50b79 | 1042 | } |
3fdadf7d DM |
1043 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1044 | } | |
1045 | #endif | |
1046 | ||
1047 | static int do_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
1048 | char __user *optval, int __user *optlen) | |
1049 | { | |
1050 | struct raw6_sock *rp = raw6_sk(sk); | |
1051 | int val, len; | |
1da177e4 LT |
1052 | |
1053 | if (get_user(len,optlen)) | |
1054 | return -EFAULT; | |
1055 | ||
1056 | switch (optname) { | |
1057 | case IPV6_CHECKSUM: | |
1058 | if (rp->checksum == 0) | |
1059 | val = -1; | |
1060 | else | |
1061 | val = rp->offset; | |
1062 | break; | |
1063 | ||
1064 | default: | |
1065 | return -ENOPROTOOPT; | |
1066 | } | |
1067 | ||
1068 | len = min_t(unsigned int, sizeof(int), len); | |
1069 | ||
1070 | if (put_user(len, optlen)) | |
1071 | return -EFAULT; | |
1072 | if (copy_to_user(optval,&val,len)) | |
1073 | return -EFAULT; | |
1074 | return 0; | |
1075 | } | |
1076 | ||
3fdadf7d DM |
1077 | static int rawv6_getsockopt(struct sock *sk, int level, int optname, |
1078 | char __user *optval, int __user *optlen) | |
1079 | { | |
1080 | switch(level) { | |
1081 | case SOL_RAW: | |
1082 | break; | |
1083 | ||
1084 | case SOL_ICMPV6: | |
1085 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1086 | return -EOPNOTSUPP; | |
1087 | return rawv6_geticmpfilter(sk, level, optname, optval, | |
1088 | optlen); | |
1089 | case SOL_IPV6: | |
1090 | if (optname == IPV6_CHECKSUM) | |
1091 | break; | |
1092 | default: | |
1093 | return ipv6_getsockopt(sk, level, optname, optval, | |
1094 | optlen); | |
3ff50b79 SH |
1095 | } |
1096 | ||
3fdadf7d DM |
1097 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1098 | } | |
1099 | ||
1100 | #ifdef CONFIG_COMPAT | |
1101 | static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1102 | char __user *optval, int __user *optlen) |
3fdadf7d | 1103 | { |
543d9cfe ACM |
1104 | switch (level) { |
1105 | case SOL_RAW: | |
1106 | break; | |
1107 | case SOL_ICMPV6: | |
1108 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1109 | return -EOPNOTSUPP; | |
1110 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); | |
1111 | case SOL_IPV6: | |
1112 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1113 | break; |
543d9cfe ACM |
1114 | default: |
1115 | return compat_ipv6_getsockopt(sk, level, optname, | |
1116 | optval, optlen); | |
3ff50b79 | 1117 | } |
3fdadf7d DM |
1118 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1119 | } | |
1120 | #endif | |
1121 | ||
1da177e4 LT |
1122 | static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) |
1123 | { | |
1124 | switch(cmd) { | |
1125 | case SIOCOUTQ: | |
1126 | { | |
1127 | int amount = atomic_read(&sk->sk_wmem_alloc); | |
1128 | return put_user(amount, (int __user *)arg); | |
1129 | } | |
1130 | case SIOCINQ: | |
1131 | { | |
1132 | struct sk_buff *skb; | |
1133 | int amount = 0; | |
1134 | ||
e0f9f858 | 1135 | spin_lock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1136 | skb = skb_peek(&sk->sk_receive_queue); |
1137 | if (skb != NULL) | |
27a884dc | 1138 | amount = skb->tail - skb->transport_header; |
e0f9f858 | 1139 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1140 | return put_user(amount, (int __user *)arg); |
1141 | } | |
1142 | ||
1143 | default: | |
1144 | return -ENOIOCTLCMD; | |
1145 | } | |
1146 | } | |
1147 | ||
1148 | static void rawv6_close(struct sock *sk, long timeout) | |
1149 | { | |
1150 | if (inet_sk(sk)->num == IPPROTO_RAW) | |
1151 | ip6_ra_control(sk, -1, NULL); | |
1152 | ||
1153 | sk_common_release(sk); | |
1154 | } | |
1155 | ||
1156 | static int rawv6_init_sk(struct sock *sk) | |
1157 | { | |
f48d5ff1 MN |
1158 | struct raw6_sock *rp = raw6_sk(sk); |
1159 | ||
1160 | switch (inet_sk(sk)->num) { | |
1161 | case IPPROTO_ICMPV6: | |
1da177e4 LT |
1162 | rp->checksum = 1; |
1163 | rp->offset = 2; | |
f48d5ff1 MN |
1164 | break; |
1165 | case IPPROTO_MH: | |
1166 | rp->checksum = 1; | |
1167 | rp->offset = 4; | |
1168 | break; | |
1169 | default: | |
1170 | break; | |
1da177e4 LT |
1171 | } |
1172 | return(0); | |
1173 | } | |
1174 | ||
c5a432f1 ED |
1175 | DEFINE_PROTO_INUSE(rawv6) |
1176 | ||
1da177e4 | 1177 | struct proto rawv6_prot = { |
543d9cfe ACM |
1178 | .name = "RAWv6", |
1179 | .owner = THIS_MODULE, | |
1180 | .close = rawv6_close, | |
1181 | .connect = ip6_datagram_connect, | |
1182 | .disconnect = udp_disconnect, | |
1183 | .ioctl = rawv6_ioctl, | |
1184 | .init = rawv6_init_sk, | |
1185 | .destroy = inet6_destroy_sock, | |
1186 | .setsockopt = rawv6_setsockopt, | |
1187 | .getsockopt = rawv6_getsockopt, | |
1188 | .sendmsg = rawv6_sendmsg, | |
1189 | .recvmsg = rawv6_recvmsg, | |
1190 | .bind = rawv6_bind, | |
1191 | .backlog_rcv = rawv6_rcv_skb, | |
1192 | .hash = raw_v6_hash, | |
1193 | .unhash = raw_v6_unhash, | |
1194 | .obj_size = sizeof(struct raw6_sock), | |
3fdadf7d | 1195 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1196 | .compat_setsockopt = compat_rawv6_setsockopt, |
1197 | .compat_getsockopt = compat_rawv6_getsockopt, | |
3fdadf7d | 1198 | #endif |
c5a432f1 | 1199 | REF_PROTO_INUSE(rawv6) |
1da177e4 LT |
1200 | }; |
1201 | ||
1202 | #ifdef CONFIG_PROC_FS | |
1da177e4 LT |
1203 | static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) |
1204 | { | |
1205 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1206 | struct in6_addr *dest, *src; | |
1207 | __u16 destp, srcp; | |
1208 | ||
1209 | dest = &np->daddr; | |
1210 | src = &np->rcv_saddr; | |
1211 | destp = 0; | |
1212 | srcp = inet_sk(sp)->num; | |
1213 | seq_printf(seq, | |
1214 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
a92aa318 | 1215 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1da177e4 LT |
1216 | i, |
1217 | src->s6_addr32[0], src->s6_addr32[1], | |
1218 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1219 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1220 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1221 | sp->sk_state, |
1da177e4 LT |
1222 | atomic_read(&sp->sk_wmem_alloc), |
1223 | atomic_read(&sp->sk_rmem_alloc), | |
1224 | 0, 0L, 0, | |
1225 | sock_i_uid(sp), 0, | |
1226 | sock_i_ino(sp), | |
a92aa318 | 1227 | atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); |
1da177e4 LT |
1228 | } |
1229 | ||
1230 | static int raw6_seq_show(struct seq_file *seq, void *v) | |
1231 | { | |
1232 | if (v == SEQ_START_TOKEN) | |
1233 | seq_printf(seq, | |
1234 | " sl " | |
1235 | "local_address " | |
1236 | "remote_address " | |
1237 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
a92aa318 | 1238 | " uid timeout inode drops\n"); |
1da177e4 | 1239 | else |
42a73808 | 1240 | raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); |
1da177e4 LT |
1241 | return 0; |
1242 | } | |
1243 | ||
56b3d975 | 1244 | static const struct seq_operations raw6_seq_ops = { |
42a73808 PE |
1245 | .start = raw_seq_start, |
1246 | .next = raw_seq_next, | |
1247 | .stop = raw_seq_stop, | |
1da177e4 LT |
1248 | .show = raw6_seq_show, |
1249 | }; | |
1250 | ||
1251 | static int raw6_seq_open(struct inode *inode, struct file *file) | |
1252 | { | |
42a73808 | 1253 | return raw_seq_open(file, &raw_v6_hashinfo, PF_INET6); |
1da177e4 LT |
1254 | } |
1255 | ||
9a32144e | 1256 | static const struct file_operations raw6_seq_fops = { |
1da177e4 LT |
1257 | .owner = THIS_MODULE, |
1258 | .open = raw6_seq_open, | |
1259 | .read = seq_read, | |
1260 | .llseek = seq_lseek, | |
1261 | .release = seq_release_private, | |
1262 | }; | |
1263 | ||
1264 | int __init raw6_proc_init(void) | |
1265 | { | |
457c4cbc | 1266 | if (!proc_net_fops_create(&init_net, "raw6", S_IRUGO, &raw6_seq_fops)) |
1da177e4 LT |
1267 | return -ENOMEM; |
1268 | return 0; | |
1269 | } | |
1270 | ||
1271 | void raw6_proc_exit(void) | |
1272 | { | |
457c4cbc | 1273 | proc_net_remove(&init_net, "raw6"); |
1da177e4 LT |
1274 | } |
1275 | #endif /* CONFIG_PROC_FS */ | |
7f4e4868 DL |
1276 | |
1277 | /* Same as inet6_dgram_ops, sans udp_poll. */ | |
1278 | static const struct proto_ops inet6_sockraw_ops = { | |
1279 | .family = PF_INET6, | |
1280 | .owner = THIS_MODULE, | |
1281 | .release = inet6_release, | |
1282 | .bind = inet6_bind, | |
1283 | .connect = inet_dgram_connect, /* ok */ | |
1284 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
1285 | .accept = sock_no_accept, /* a do nothing */ | |
1286 | .getname = inet6_getname, | |
1287 | .poll = datagram_poll, /* ok */ | |
1288 | .ioctl = inet6_ioctl, /* must change */ | |
1289 | .listen = sock_no_listen, /* ok */ | |
1290 | .shutdown = inet_shutdown, /* ok */ | |
1291 | .setsockopt = sock_common_setsockopt, /* ok */ | |
1292 | .getsockopt = sock_common_getsockopt, /* ok */ | |
1293 | .sendmsg = inet_sendmsg, /* ok */ | |
1294 | .recvmsg = sock_common_recvmsg, /* ok */ | |
1295 | .mmap = sock_no_mmap, | |
1296 | .sendpage = sock_no_sendpage, | |
1297 | #ifdef CONFIG_COMPAT | |
1298 | .compat_setsockopt = compat_sock_common_setsockopt, | |
1299 | .compat_getsockopt = compat_sock_common_getsockopt, | |
1300 | #endif | |
1301 | }; | |
1302 | ||
1303 | static struct inet_protosw rawv6_protosw = { | |
1304 | .type = SOCK_RAW, | |
1305 | .protocol = IPPROTO_IP, /* wild card */ | |
1306 | .prot = &rawv6_prot, | |
1307 | .ops = &inet6_sockraw_ops, | |
1308 | .capability = CAP_NET_RAW, | |
1309 | .no_check = UDP_CSUM_DEFAULT, | |
1310 | .flags = INET_PROTOSW_REUSE, | |
1311 | }; | |
1312 | ||
1313 | int __init rawv6_init(void) | |
1314 | { | |
1315 | int ret; | |
1316 | ||
1317 | ret = inet6_register_protosw(&rawv6_protosw); | |
1318 | if (ret) | |
1319 | goto out; | |
1320 | out: | |
1321 | return ret; | |
1322 | } | |
1323 | ||
1324 | void __exit rawv6_exit(void) | |
1325 | { | |
1326 | inet6_unregister_protosw(&rawv6_protosw); | |
1327 | } |