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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 | 67 | |
be185884 PE |
68 | static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk, |
69 | unsigned short num, struct in6_addr *loc_addr, | |
70 | struct in6_addr *rmt_addr, int dif) | |
1da177e4 LT |
71 | { |
72 | struct hlist_node *node; | |
73 | int is_multicast = ipv6_addr_is_multicast(loc_addr); | |
74 | ||
75 | sk_for_each_from(sk, node) | |
76 | if (inet_sk(sk)->num == num) { | |
77 | struct ipv6_pinfo *np = inet6_sk(sk); | |
78 | ||
be185884 PE |
79 | if (sk->sk_net != net) |
80 | continue; | |
81 | ||
1da177e4 LT |
82 | if (!ipv6_addr_any(&np->daddr) && |
83 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
84 | continue; | |
85 | ||
0bd1b59b AM |
86 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) |
87 | continue; | |
88 | ||
1da177e4 LT |
89 | if (!ipv6_addr_any(&np->rcv_saddr)) { |
90 | if (ipv6_addr_equal(&np->rcv_saddr, loc_addr)) | |
91 | goto found; | |
92 | if (is_multicast && | |
93 | inet6_mc_check(sk, loc_addr, rmt_addr)) | |
94 | goto found; | |
95 | continue; | |
96 | } | |
97 | goto found; | |
98 | } | |
99 | sk = NULL; | |
100 | found: | |
101 | return sk; | |
102 | } | |
103 | ||
104 | /* | |
105 | * 0 - deliver | |
106 | * 1 - block | |
107 | */ | |
108 | static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb) | |
109 | { | |
110 | struct icmp6hdr *icmph; | |
111 | struct raw6_sock *rp = raw6_sk(sk); | |
112 | ||
113 | if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) { | |
114 | __u32 *data = &rp->filter.data[0]; | |
115 | int bit_nr; | |
116 | ||
117 | icmph = (struct icmp6hdr *) skb->data; | |
118 | bit_nr = icmph->icmp6_type; | |
119 | ||
120 | return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0; | |
121 | } | |
122 | return 0; | |
123 | } | |
124 | ||
59fbb3a6 MN |
125 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
126 | static int (*mh_filter)(struct sock *sock, struct sk_buff *skb); | |
127 | ||
128 | int rawv6_mh_filter_register(int (*filter)(struct sock *sock, | |
129 | struct sk_buff *skb)) | |
130 | { | |
131 | rcu_assign_pointer(mh_filter, filter); | |
132 | return 0; | |
133 | } | |
134 | EXPORT_SYMBOL(rawv6_mh_filter_register); | |
135 | ||
136 | int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock, | |
137 | struct sk_buff *skb)) | |
138 | { | |
139 | rcu_assign_pointer(mh_filter, NULL); | |
140 | synchronize_rcu(); | |
141 | return 0; | |
142 | } | |
143 | EXPORT_SYMBOL(rawv6_mh_filter_unregister); | |
144 | ||
145 | #endif | |
146 | ||
1da177e4 LT |
147 | /* |
148 | * demultiplex raw sockets. | |
149 | * (should consider queueing the skb in the sock receive_queue | |
150 | * without calling rawv6.c) | |
151 | * | |
152 | * Caller owns SKB so we must make clones. | |
153 | */ | |
69d6da0b | 154 | static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) |
1da177e4 LT |
155 | { |
156 | struct in6_addr *saddr; | |
157 | struct in6_addr *daddr; | |
158 | struct sock *sk; | |
d13964f4 | 159 | int delivered = 0; |
1da177e4 | 160 | __u8 hash; |
be185884 | 161 | struct net *net; |
1da177e4 | 162 | |
0660e03f | 163 | saddr = &ipv6_hdr(skb)->saddr; |
1da177e4 LT |
164 | daddr = saddr + 1; |
165 | ||
166 | hash = nexthdr & (MAX_INET_PROTOS - 1); | |
167 | ||
b673e4df PE |
168 | read_lock(&raw_v6_hashinfo.lock); |
169 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
1da177e4 LT |
170 | |
171 | /* | |
172 | * The first socket found will be delivered after | |
173 | * delivery to transport protocols. | |
174 | */ | |
175 | ||
176 | if (sk == NULL) | |
177 | goto out; | |
178 | ||
be185884 PE |
179 | net = skb->dev->nd_net; |
180 | sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif); | |
1da177e4 LT |
181 | |
182 | while (sk) { | |
7be96f76 MN |
183 | int filtered; |
184 | ||
d13964f4 | 185 | delivered = 1; |
7be96f76 MN |
186 | switch (nexthdr) { |
187 | case IPPROTO_ICMPV6: | |
188 | filtered = icmpv6_filter(sk, skb); | |
189 | break; | |
59fbb3a6 MN |
190 | |
191 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) | |
7be96f76 | 192 | case IPPROTO_MH: |
59fbb3a6 | 193 | { |
7be96f76 MN |
194 | /* XXX: To validate MH only once for each packet, |
195 | * this is placed here. It should be after checking | |
196 | * xfrm policy, however it doesn't. The checking xfrm | |
197 | * policy is placed in rawv6_rcv() because it is | |
198 | * required for each socket. | |
199 | */ | |
59fbb3a6 MN |
200 | int (*filter)(struct sock *sock, struct sk_buff *skb); |
201 | ||
202 | filter = rcu_dereference(mh_filter); | |
203 | filtered = filter ? filter(sk, skb) : 0; | |
7be96f76 | 204 | break; |
59fbb3a6 | 205 | } |
7be96f76 MN |
206 | #endif |
207 | default: | |
208 | filtered = 0; | |
209 | break; | |
210 | } | |
211 | ||
212 | if (filtered < 0) | |
213 | break; | |
214 | if (filtered == 0) { | |
1da177e4 LT |
215 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); |
216 | ||
217 | /* Not releasing hash table! */ | |
9fb9cbb1 YK |
218 | if (clone) { |
219 | nf_reset(clone); | |
1da177e4 | 220 | rawv6_rcv(sk, clone); |
9fb9cbb1 | 221 | } |
1da177e4 | 222 | } |
be185884 | 223 | sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr, |
2dac4b96 | 224 | IP6CB(skb)->iif); |
1da177e4 LT |
225 | } |
226 | out: | |
b673e4df | 227 | read_unlock(&raw_v6_hashinfo.lock); |
d13964f4 | 228 | return delivered; |
1da177e4 LT |
229 | } |
230 | ||
69d6da0b PE |
231 | int raw6_local_deliver(struct sk_buff *skb, int nexthdr) |
232 | { | |
233 | struct sock *raw_sk; | |
234 | ||
b673e4df | 235 | raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]); |
69d6da0b PE |
236 | if (raw_sk && !ipv6_raw_deliver(skb, nexthdr)) |
237 | raw_sk = NULL; | |
238 | ||
239 | return raw_sk != NULL; | |
240 | } | |
241 | ||
1da177e4 LT |
242 | /* This cleans up af_inet6 a bit. -DaveM */ |
243 | static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
244 | { | |
245 | struct inet_sock *inet = inet_sk(sk); | |
246 | struct ipv6_pinfo *np = inet6_sk(sk); | |
247 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; | |
e69a4adc | 248 | __be32 v4addr = 0; |
1da177e4 LT |
249 | int addr_type; |
250 | int err; | |
251 | ||
252 | if (addr_len < SIN6_LEN_RFC2133) | |
253 | return -EINVAL; | |
254 | addr_type = ipv6_addr_type(&addr->sin6_addr); | |
255 | ||
256 | /* Raw sockets are IPv6 only */ | |
257 | if (addr_type == IPV6_ADDR_MAPPED) | |
258 | return(-EADDRNOTAVAIL); | |
259 | ||
260 | lock_sock(sk); | |
261 | ||
262 | err = -EINVAL; | |
263 | if (sk->sk_state != TCP_CLOSE) | |
264 | goto out; | |
265 | ||
266 | /* Check if the address belongs to the host. */ | |
267 | if (addr_type != IPV6_ADDR_ANY) { | |
268 | struct net_device *dev = NULL; | |
269 | ||
270 | if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
271 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
272 | addr->sin6_scope_id) { | |
273 | /* Override any existing binding, if another | |
274 | * one is supplied by user. | |
275 | */ | |
276 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
277 | } | |
1ab1457c | 278 | |
1da177e4 LT |
279 | /* Binding to link-local address requires an interface */ |
280 | if (!sk->sk_bound_dev_if) | |
281 | goto out; | |
282 | ||
e5ba31f1 | 283 | dev = dev_get_by_index(sk->sk_net, sk->sk_bound_dev_if); |
1da177e4 LT |
284 | if (!dev) { |
285 | err = -ENODEV; | |
286 | goto out; | |
287 | } | |
288 | } | |
1ab1457c | 289 | |
1da177e4 LT |
290 | /* ipv4 addr of the socket is invalid. Only the |
291 | * unspecified and mapped address have a v4 equivalent. | |
292 | */ | |
293 | v4addr = LOOPBACK4_IPV6; | |
294 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
295 | err = -EADDRNOTAVAIL; | |
e5ba31f1 | 296 | if (!ipv6_chk_addr(sk->sk_net, &addr->sin6_addr, |
bfeade08 | 297 | dev, 0)) { |
1da177e4 LT |
298 | if (dev) |
299 | dev_put(dev); | |
300 | goto out; | |
301 | } | |
302 | } | |
303 | if (dev) | |
304 | dev_put(dev); | |
305 | } | |
306 | ||
307 | inet->rcv_saddr = inet->saddr = v4addr; | |
308 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); | |
309 | if (!(addr_type & IPV6_ADDR_MULTICAST)) | |
310 | ipv6_addr_copy(&np->saddr, &addr->sin6_addr); | |
311 | err = 0; | |
312 | out: | |
313 | release_sock(sk); | |
314 | return err; | |
315 | } | |
316 | ||
69d6da0b | 317 | static void rawv6_err(struct sock *sk, struct sk_buff *skb, |
1da177e4 | 318 | struct inet6_skb_parm *opt, |
04ce6909 | 319 | int type, int code, int offset, __be32 info) |
1da177e4 LT |
320 | { |
321 | struct inet_sock *inet = inet_sk(sk); | |
322 | struct ipv6_pinfo *np = inet6_sk(sk); | |
323 | int err; | |
324 | int harderr; | |
325 | ||
326 | /* Report error on raw socket, if: | |
327 | 1. User requested recverr. | |
328 | 2. Socket is connected (otherwise the error indication | |
329 | is useless without recverr and error is hard. | |
330 | */ | |
331 | if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) | |
332 | return; | |
333 | ||
334 | harderr = icmpv6_err_convert(type, code, &err); | |
335 | if (type == ICMPV6_PKT_TOOBIG) | |
336 | harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); | |
337 | ||
338 | if (np->recverr) { | |
339 | u8 *payload = skb->data; | |
340 | if (!inet->hdrincl) | |
341 | payload += offset; | |
342 | ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); | |
343 | } | |
344 | ||
345 | if (np->recverr || harderr) { | |
346 | sk->sk_err = err; | |
347 | sk->sk_error_report(sk); | |
348 | } | |
349 | } | |
350 | ||
69d6da0b PE |
351 | void raw6_icmp_error(struct sk_buff *skb, int nexthdr, |
352 | int type, int code, int inner_offset, __be32 info) | |
353 | { | |
354 | struct sock *sk; | |
355 | int hash; | |
356 | struct in6_addr *saddr, *daddr; | |
be185884 | 357 | struct net *net; |
69d6da0b | 358 | |
b673e4df | 359 | hash = nexthdr & (RAW_HTABLE_SIZE - 1); |
69d6da0b | 360 | |
b673e4df PE |
361 | read_lock(&raw_v6_hashinfo.lock); |
362 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
69d6da0b PE |
363 | if (sk != NULL) { |
364 | saddr = &ipv6_hdr(skb)->saddr; | |
365 | daddr = &ipv6_hdr(skb)->daddr; | |
be185884 | 366 | net = skb->dev->nd_net; |
69d6da0b | 367 | |
be185884 | 368 | while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr, |
69d6da0b PE |
369 | IP6CB(skb)->iif))) { |
370 | rawv6_err(sk, skb, NULL, type, code, | |
371 | inner_offset, info); | |
372 | sk = sk_next(sk); | |
373 | } | |
374 | } | |
b673e4df | 375 | read_unlock(&raw_v6_hashinfo.lock); |
69d6da0b PE |
376 | } |
377 | ||
1da177e4 LT |
378 | static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb) |
379 | { | |
1ab1457c | 380 | if ((raw6_sk(sk)->checksum || sk->sk_filter) && |
fb286bb2 | 381 | skb_checksum_complete(skb)) { |
a92aa318 | 382 | atomic_inc(&sk->sk_drops); |
fb286bb2 HX |
383 | kfree_skb(skb); |
384 | return 0; | |
1da177e4 LT |
385 | } |
386 | ||
387 | /* Charge it to the socket. */ | |
388 | if (sock_queue_rcv_skb(sk,skb)<0) { | |
a92aa318 | 389 | atomic_inc(&sk->sk_drops); |
1da177e4 LT |
390 | kfree_skb(skb); |
391 | return 0; | |
392 | } | |
393 | ||
394 | return 0; | |
395 | } | |
396 | ||
397 | /* | |
1ab1457c | 398 | * This is next to useless... |
1da177e4 | 399 | * if we demultiplex in network layer we don't need the extra call |
1ab1457c YH |
400 | * just to queue the skb... |
401 | * maybe we could have the network decide upon a hint if it | |
1da177e4 LT |
402 | * should call raw_rcv for demultiplexing |
403 | */ | |
404 | int rawv6_rcv(struct sock *sk, struct sk_buff *skb) | |
405 | { | |
406 | struct inet_sock *inet = inet_sk(sk); | |
407 | struct raw6_sock *rp = raw6_sk(sk); | |
408 | ||
1ab1457c | 409 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { |
a92aa318 | 410 | atomic_inc(&sk->sk_drops); |
1ab1457c YH |
411 | kfree_skb(skb); |
412 | return NET_RX_DROP; | |
413 | } | |
1da177e4 LT |
414 | |
415 | if (!rp->checksum) | |
416 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
417 | ||
84fa7933 | 418 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
d56f90a7 | 419 | skb_postpull_rcsum(skb, skb_network_header(skb), |
cfe1fc77 | 420 | skb_network_header_len(skb)); |
0660e03f ACM |
421 | if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
422 | &ipv6_hdr(skb)->daddr, | |
fb286bb2 | 423 | skb->len, inet->num, skb->csum)) |
1da177e4 | 424 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1da177e4 | 425 | } |
60476372 | 426 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
427 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
428 | &ipv6_hdr(skb)->daddr, | |
429 | skb->len, | |
430 | inet->num, 0)); | |
1da177e4 LT |
431 | |
432 | if (inet->hdrincl) { | |
fb286bb2 | 433 | if (skb_checksum_complete(skb)) { |
a92aa318 | 434 | atomic_inc(&sk->sk_drops); |
1da177e4 LT |
435 | kfree_skb(skb); |
436 | return 0; | |
437 | } | |
1da177e4 LT |
438 | } |
439 | ||
440 | rawv6_rcv_skb(sk, skb); | |
441 | return 0; | |
442 | } | |
443 | ||
444 | ||
445 | /* | |
446 | * This should be easy, if there is something there | |
447 | * we return it, otherwise we block. | |
448 | */ | |
449 | ||
450 | static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk, | |
451 | struct msghdr *msg, size_t len, | |
452 | int noblock, int flags, int *addr_len) | |
453 | { | |
454 | struct ipv6_pinfo *np = inet6_sk(sk); | |
455 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name; | |
456 | struct sk_buff *skb; | |
457 | size_t copied; | |
458 | int err; | |
459 | ||
460 | if (flags & MSG_OOB) | |
461 | return -EOPNOTSUPP; | |
1ab1457c YH |
462 | |
463 | if (addr_len) | |
1da177e4 LT |
464 | *addr_len=sizeof(*sin6); |
465 | ||
466 | if (flags & MSG_ERRQUEUE) | |
467 | return ipv6_recv_error(sk, msg, len); | |
468 | ||
469 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
470 | if (!skb) | |
471 | goto out; | |
472 | ||
473 | copied = skb->len; | |
1ab1457c YH |
474 | if (copied > len) { |
475 | copied = len; | |
476 | msg->msg_flags |= MSG_TRUNC; | |
477 | } | |
1da177e4 | 478 | |
60476372 | 479 | if (skb_csum_unnecessary(skb)) { |
1da177e4 LT |
480 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
481 | } else if (msg->msg_flags&MSG_TRUNC) { | |
fb286bb2 | 482 | if (__skb_checksum_complete(skb)) |
1da177e4 LT |
483 | goto csum_copy_err; |
484 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
485 | } else { | |
486 | err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov); | |
487 | if (err == -EINVAL) | |
488 | goto csum_copy_err; | |
489 | } | |
490 | if (err) | |
491 | goto out_free; | |
492 | ||
493 | /* Copy the address. */ | |
494 | if (sin6) { | |
495 | sin6->sin6_family = AF_INET6; | |
f59fc7f3 | 496 | sin6->sin6_port = 0; |
0660e03f | 497 | ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr); |
1da177e4 LT |
498 | sin6->sin6_flowinfo = 0; |
499 | sin6->sin6_scope_id = 0; | |
500 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
501 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
502 | } | |
503 | ||
504 | sock_recv_timestamp(msg, sk, skb); | |
505 | ||
506 | if (np->rxopt.all) | |
507 | datagram_recv_ctl(sk, msg, skb); | |
508 | ||
509 | err = copied; | |
510 | if (flags & MSG_TRUNC) | |
511 | err = skb->len; | |
512 | ||
513 | out_free: | |
514 | skb_free_datagram(sk, skb); | |
515 | out: | |
516 | return err; | |
517 | ||
518 | csum_copy_err: | |
3305b80c | 519 | skb_kill_datagram(sk, skb, flags); |
1da177e4 LT |
520 | |
521 | /* Error for blocking case is chosen to masquerade | |
522 | as some normal condition. | |
523 | */ | |
524 | err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; | |
a92aa318 | 525 | atomic_inc(&sk->sk_drops); |
3305b80c | 526 | goto out; |
1da177e4 LT |
527 | } |
528 | ||
529 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl, | |
357b40a1 | 530 | struct raw6_sock *rp) |
1da177e4 LT |
531 | { |
532 | struct sk_buff *skb; | |
533 | int err = 0; | |
357b40a1 HX |
534 | int offset; |
535 | int len; | |
679a8738 | 536 | int total_len; |
868c86bc AV |
537 | __wsum tmp_csum; |
538 | __sum16 csum; | |
1da177e4 LT |
539 | |
540 | if (!rp->checksum) | |
541 | goto send; | |
542 | ||
543 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
544 | goto out; | |
545 | ||
357b40a1 | 546 | offset = rp->offset; |
d56f90a7 ACM |
547 | total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) - |
548 | skb->data); | |
679a8738 | 549 | if (offset >= total_len - 1) { |
1da177e4 | 550 | err = -EINVAL; |
357b40a1 | 551 | ip6_flush_pending_frames(sk); |
1da177e4 LT |
552 | goto out; |
553 | } | |
554 | ||
555 | /* should be check HW csum miyazawa */ | |
556 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
557 | /* | |
558 | * Only one fragment on the socket. | |
559 | */ | |
560 | tmp_csum = skb->csum; | |
561 | } else { | |
357b40a1 | 562 | struct sk_buff *csum_skb = NULL; |
1da177e4 LT |
563 | tmp_csum = 0; |
564 | ||
565 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
566 | tmp_csum = csum_add(tmp_csum, skb->csum); | |
357b40a1 HX |
567 | |
568 | if (csum_skb) | |
569 | continue; | |
570 | ||
ea2ae17d | 571 | len = skb->len - skb_transport_offset(skb); |
357b40a1 HX |
572 | if (offset >= len) { |
573 | offset -= len; | |
574 | continue; | |
575 | } | |
576 | ||
577 | csum_skb = skb; | |
1da177e4 | 578 | } |
357b40a1 HX |
579 | |
580 | skb = csum_skb; | |
1da177e4 LT |
581 | } |
582 | ||
ea2ae17d | 583 | offset += skb_transport_offset(skb); |
357b40a1 HX |
584 | if (skb_copy_bits(skb, offset, &csum, 2)) |
585 | BUG(); | |
586 | ||
1da177e4 | 587 | /* in case cksum was not initialized */ |
357b40a1 | 588 | if (unlikely(csum)) |
5f92a738 | 589 | tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); |
357b40a1 | 590 | |
868c86bc | 591 | csum = csum_ipv6_magic(&fl->fl6_src, |
357b40a1 | 592 | &fl->fl6_dst, |
679a8738 | 593 | total_len, fl->proto, tmp_csum); |
357b40a1 | 594 | |
f6ab0288 AV |
595 | if (csum == 0 && fl->proto == IPPROTO_UDP) |
596 | csum = CSUM_MANGLED_0; | |
1da177e4 | 597 | |
357b40a1 HX |
598 | if (skb_store_bits(skb, offset, &csum, 2)) |
599 | BUG(); | |
1da177e4 | 600 | |
1da177e4 LT |
601 | send: |
602 | err = ip6_push_pending_frames(sk); | |
603 | out: | |
604 | return err; | |
605 | } | |
606 | ||
607 | static int rawv6_send_hdrinc(struct sock *sk, void *from, int length, | |
1ab1457c | 608 | struct flowi *fl, struct rt6_info *rt, |
1da177e4 LT |
609 | unsigned int flags) |
610 | { | |
3320da89 | 611 | struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 LT |
612 | struct ipv6hdr *iph; |
613 | struct sk_buff *skb; | |
614 | unsigned int hh_len; | |
615 | int err; | |
616 | ||
617 | if (length > rt->u.dst.dev->mtu) { | |
618 | ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu); | |
619 | return -EMSGSIZE; | |
620 | } | |
621 | if (flags&MSG_PROBE) | |
622 | goto out; | |
623 | ||
624 | hh_len = LL_RESERVED_SPACE(rt->u.dst.dev); | |
625 | ||
626 | skb = sock_alloc_send_skb(sk, length+hh_len+15, | |
627 | flags&MSG_DONTWAIT, &err); | |
628 | if (skb == NULL) | |
1ab1457c | 629 | goto error; |
1da177e4 LT |
630 | skb_reserve(skb, hh_len); |
631 | ||
632 | skb->priority = sk->sk_priority; | |
4a19ec58 | 633 | skb->mark = sk->sk_mark; |
1da177e4 LT |
634 | skb->dst = dst_clone(&rt->u.dst); |
635 | ||
1ced98e8 ACM |
636 | skb_put(skb, length); |
637 | skb_reset_network_header(skb); | |
0660e03f | 638 | iph = ipv6_hdr(skb); |
1da177e4 LT |
639 | |
640 | skb->ip_summed = CHECKSUM_NONE; | |
641 | ||
b0e380b1 | 642 | skb->transport_header = skb->network_header; |
1da177e4 LT |
643 | err = memcpy_fromiovecend((void *)iph, from, 0, length); |
644 | if (err) | |
645 | goto error_fault; | |
646 | ||
a11d206d | 647 | IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS); |
6e23ae2a | 648 | err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev, |
1da177e4 LT |
649 | dst_output); |
650 | if (err > 0) | |
3320da89 | 651 | err = np->recverr ? net_xmit_errno(err) : 0; |
1da177e4 LT |
652 | if (err) |
653 | goto error; | |
654 | out: | |
655 | return 0; | |
656 | ||
657 | error_fault: | |
658 | err = -EFAULT; | |
659 | kfree_skb(skb); | |
660 | error: | |
a11d206d | 661 | IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); |
1ab1457c | 662 | return err; |
1da177e4 LT |
663 | } |
664 | ||
a27b58fe | 665 | static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) |
1da177e4 LT |
666 | { |
667 | struct iovec *iov; | |
668 | u8 __user *type = NULL; | |
669 | u8 __user *code = NULL; | |
6e8f4d48 | 670 | u8 len = 0; |
1da177e4 LT |
671 | int probed = 0; |
672 | int i; | |
673 | ||
674 | if (!msg->msg_iov) | |
a27b58fe | 675 | return 0; |
1da177e4 LT |
676 | |
677 | for (i = 0; i < msg->msg_iovlen; i++) { | |
678 | iov = &msg->msg_iov[i]; | |
679 | if (!iov) | |
680 | continue; | |
681 | ||
682 | switch (fl->proto) { | |
683 | case IPPROTO_ICMPV6: | |
684 | /* check if one-byte field is readable or not. */ | |
685 | if (iov->iov_base && iov->iov_len < 1) | |
686 | break; | |
687 | ||
688 | if (!type) { | |
689 | type = iov->iov_base; | |
690 | /* check if code field is readable or not. */ | |
691 | if (iov->iov_len > 1) | |
692 | code = type + 1; | |
693 | } else if (!code) | |
694 | code = iov->iov_base; | |
695 | ||
696 | if (type && code) { | |
a27b58fe HC |
697 | if (get_user(fl->fl_icmp_type, type) || |
698 | get_user(fl->fl_icmp_code, code)) | |
699 | return -EFAULT; | |
1da177e4 LT |
700 | probed = 1; |
701 | } | |
702 | break; | |
6e8f4d48 MN |
703 | case IPPROTO_MH: |
704 | if (iov->iov_base && iov->iov_len < 1) | |
705 | break; | |
706 | /* check if type field is readable or not. */ | |
707 | if (iov->iov_len > 2 - len) { | |
708 | u8 __user *p = iov->iov_base; | |
a27b58fe HC |
709 | if (get_user(fl->fl_mh_type, &p[2 - len])) |
710 | return -EFAULT; | |
6e8f4d48 MN |
711 | probed = 1; |
712 | } else | |
713 | len += iov->iov_len; | |
714 | ||
715 | break; | |
1da177e4 LT |
716 | default: |
717 | probed = 1; | |
718 | break; | |
719 | } | |
720 | if (probed) | |
721 | break; | |
722 | } | |
a27b58fe | 723 | return 0; |
1da177e4 LT |
724 | } |
725 | ||
726 | static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, | |
727 | struct msghdr *msg, size_t len) | |
728 | { | |
729 | struct ipv6_txoptions opt_space; | |
730 | struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
731 | struct in6_addr *daddr, *final_p = NULL, final; | |
732 | struct inet_sock *inet = inet_sk(sk); | |
733 | struct ipv6_pinfo *np = inet6_sk(sk); | |
734 | struct raw6_sock *rp = raw6_sk(sk); | |
735 | struct ipv6_txoptions *opt = NULL; | |
736 | struct ip6_flowlabel *flowlabel = NULL; | |
737 | struct dst_entry *dst = NULL; | |
738 | struct flowi fl; | |
739 | int addr_len = msg->msg_namelen; | |
740 | int hlimit = -1; | |
41a1f8ea | 741 | int tclass = -1; |
1da177e4 LT |
742 | u16 proto; |
743 | int err; | |
744 | ||
745 | /* Rough check on arithmetic overflow, | |
b59e139b | 746 | better check is made in ip6_append_data(). |
1da177e4 | 747 | */ |
b59e139b | 748 | if (len > INT_MAX) |
1da177e4 LT |
749 | return -EMSGSIZE; |
750 | ||
751 | /* Mirror BSD error message compatibility */ | |
1ab1457c | 752 | if (msg->msg_flags & MSG_OOB) |
1da177e4 LT |
753 | return -EOPNOTSUPP; |
754 | ||
755 | /* | |
1ab1457c | 756 | * Get and verify the address. |
1da177e4 LT |
757 | */ |
758 | memset(&fl, 0, sizeof(fl)); | |
759 | ||
4a19ec58 LAT |
760 | fl.mark = sk->sk_mark; |
761 | ||
1da177e4 | 762 | if (sin6) { |
1ab1457c | 763 | if (addr_len < SIN6_LEN_RFC2133) |
1da177e4 LT |
764 | return -EINVAL; |
765 | ||
1ab1457c | 766 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) |
1da177e4 LT |
767 | return(-EAFNOSUPPORT); |
768 | ||
769 | /* port is the proto value [0..255] carried in nexthdr */ | |
770 | proto = ntohs(sin6->sin6_port); | |
771 | ||
772 | if (!proto) | |
773 | proto = inet->num; | |
774 | else if (proto != inet->num) | |
775 | return(-EINVAL); | |
776 | ||
777 | if (proto > 255) | |
778 | return(-EINVAL); | |
779 | ||
780 | daddr = &sin6->sin6_addr; | |
781 | if (np->sndflow) { | |
782 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; | |
783 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
784 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
785 | if (flowlabel == NULL) | |
786 | return -EINVAL; | |
787 | daddr = &flowlabel->dst; | |
788 | } | |
789 | } | |
790 | ||
791 | /* | |
792 | * Otherwise it will be difficult to maintain | |
793 | * sk->sk_dst_cache. | |
794 | */ | |
795 | if (sk->sk_state == TCP_ESTABLISHED && | |
796 | ipv6_addr_equal(daddr, &np->daddr)) | |
797 | daddr = &np->daddr; | |
798 | ||
799 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
800 | sin6->sin6_scope_id && | |
801 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
802 | fl.oif = sin6->sin6_scope_id; | |
803 | } else { | |
1ab1457c | 804 | if (sk->sk_state != TCP_ESTABLISHED) |
1da177e4 | 805 | return -EDESTADDRREQ; |
1ab1457c | 806 | |
1da177e4 LT |
807 | proto = inet->num; |
808 | daddr = &np->daddr; | |
809 | fl.fl6_flowlabel = np->flow_label; | |
810 | } | |
811 | ||
812 | if (ipv6_addr_any(daddr)) { | |
1ab1457c YH |
813 | /* |
814 | * unspecified destination address | |
1da177e4 LT |
815 | * treated as error... is this correct ? |
816 | */ | |
817 | fl6_sock_release(flowlabel); | |
818 | return(-EINVAL); | |
819 | } | |
820 | ||
821 | if (fl.oif == 0) | |
822 | fl.oif = sk->sk_bound_dev_if; | |
823 | ||
824 | if (msg->msg_controllen) { | |
825 | opt = &opt_space; | |
826 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
827 | opt->tot_len = sizeof(struct ipv6_txoptions); | |
828 | ||
41a1f8ea | 829 | err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
830 | if (err < 0) { |
831 | fl6_sock_release(flowlabel); | |
832 | return err; | |
833 | } | |
834 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { | |
835 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
836 | if (flowlabel == NULL) | |
837 | return -EINVAL; | |
838 | } | |
839 | if (!(opt->opt_nflen|opt->opt_flen)) | |
840 | opt = NULL; | |
841 | } | |
842 | if (opt == NULL) | |
843 | opt = np->opt; | |
df9890c3 YH |
844 | if (flowlabel) |
845 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
846 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 LT |
847 | |
848 | fl.proto = proto; | |
a27b58fe HC |
849 | err = rawv6_probe_proto_opt(&fl, msg); |
850 | if (err) | |
851 | goto out; | |
1ab1457c | 852 | |
1da177e4 LT |
853 | ipv6_addr_copy(&fl.fl6_dst, daddr); |
854 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) | |
855 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
856 | ||
857 | /* merge ip6_build_xmit from ip6_output */ | |
858 | if (opt && opt->srcrt) { | |
859 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
860 | ipv6_addr_copy(&final, &fl.fl6_dst); | |
861 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
862 | final_p = &final; | |
863 | } | |
864 | ||
865 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) | |
866 | fl.oif = np->mcast_oif; | |
beb8d13b | 867 | security_sk_classify_flow(sk, &fl); |
1da177e4 LT |
868 | |
869 | err = ip6_dst_lookup(sk, &dst, &fl); | |
870 | if (err) | |
871 | goto out; | |
872 | if (final_p) | |
873 | ipv6_addr_copy(&fl.fl6_dst, final_p); | |
874 | ||
bb72845e | 875 | if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) { |
14e50e57 DM |
876 | if (err == -EREMOTE) |
877 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
878 | if (err < 0) | |
879 | goto out; | |
880 | } | |
1da177e4 LT |
881 | |
882 | if (hlimit < 0) { | |
883 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) | |
884 | hlimit = np->mcast_hops; | |
885 | else | |
886 | hlimit = np->hop_limit; | |
887 | if (hlimit < 0) | |
6b75d090 | 888 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
889 | } |
890 | ||
41a1f8ea | 891 | if (tclass < 0) { |
e012d51c | 892 | tclass = np->tclass; |
41a1f8ea YH |
893 | if (tclass < 0) |
894 | tclass = 0; | |
895 | } | |
896 | ||
1da177e4 LT |
897 | if (msg->msg_flags&MSG_CONFIRM) |
898 | goto do_confirm; | |
899 | ||
900 | back_from_confirm: | |
901 | if (inet->hdrincl) { | |
902 | err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags); | |
903 | } else { | |
904 | lock_sock(sk); | |
41a1f8ea YH |
905 | err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, |
906 | len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst, | |
907 | msg->msg_flags); | |
1da177e4 LT |
908 | |
909 | if (err) | |
910 | ip6_flush_pending_frames(sk); | |
911 | else if (!(msg->msg_flags & MSG_MORE)) | |
357b40a1 | 912 | err = rawv6_push_pending_frames(sk, &fl, rp); |
3ef9d943 | 913 | release_sock(sk); |
1da177e4 LT |
914 | } |
915 | done: | |
6d3e85ec | 916 | dst_release(dst); |
1ab1457c | 917 | out: |
1da177e4 LT |
918 | fl6_sock_release(flowlabel); |
919 | return err<0?err:len; | |
920 | do_confirm: | |
921 | dst_confirm(dst); | |
922 | if (!(msg->msg_flags & MSG_PROBE) || len) | |
923 | goto back_from_confirm; | |
924 | err = 0; | |
925 | goto done; | |
926 | } | |
927 | ||
1ab1457c | 928 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
929 | char __user *optval, int optlen) |
930 | { | |
931 | switch (optname) { | |
932 | case ICMPV6_FILTER: | |
933 | if (optlen > sizeof(struct icmp6_filter)) | |
934 | optlen = sizeof(struct icmp6_filter); | |
935 | if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) | |
936 | return -EFAULT; | |
937 | return 0; | |
938 | default: | |
939 | return -ENOPROTOOPT; | |
3ff50b79 | 940 | } |
1da177e4 LT |
941 | |
942 | return 0; | |
943 | } | |
944 | ||
1ab1457c | 945 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
946 | char __user *optval, int __user *optlen) |
947 | { | |
948 | int len; | |
949 | ||
950 | switch (optname) { | |
951 | case ICMPV6_FILTER: | |
952 | if (get_user(len, optlen)) | |
953 | return -EFAULT; | |
954 | if (len < 0) | |
955 | return -EINVAL; | |
956 | if (len > sizeof(struct icmp6_filter)) | |
957 | len = sizeof(struct icmp6_filter); | |
958 | if (put_user(len, optlen)) | |
959 | return -EFAULT; | |
960 | if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) | |
961 | return -EFAULT; | |
962 | return 0; | |
963 | default: | |
964 | return -ENOPROTOOPT; | |
3ff50b79 | 965 | } |
1da177e4 LT |
966 | |
967 | return 0; | |
968 | } | |
969 | ||
970 | ||
3fdadf7d | 971 | static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
972 | char __user *optval, int optlen) |
973 | { | |
974 | struct raw6_sock *rp = raw6_sk(sk); | |
975 | int val; | |
976 | ||
1ab1457c | 977 | if (get_user(val, (int __user *)optval)) |
1da177e4 LT |
978 | return -EFAULT; |
979 | ||
980 | switch (optname) { | |
981 | case IPV6_CHECKSUM: | |
982 | /* You may get strange result with a positive odd offset; | |
983 | RFC2292bis agrees with me. */ | |
984 | if (val > 0 && (val&1)) | |
985 | return(-EINVAL); | |
986 | if (val < 0) { | |
987 | rp->checksum = 0; | |
988 | } else { | |
989 | rp->checksum = 1; | |
990 | rp->offset = val; | |
991 | } | |
992 | ||
993 | return 0; | |
994 | break; | |
995 | ||
996 | default: | |
997 | return(-ENOPROTOOPT); | |
998 | } | |
999 | } | |
1000 | ||
3fdadf7d DM |
1001 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, |
1002 | char __user *optval, int optlen) | |
1da177e4 | 1003 | { |
1da177e4 LT |
1004 | switch(level) { |
1005 | case SOL_RAW: | |
1006 | break; | |
1007 | ||
1008 | case SOL_ICMPV6: | |
1009 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1010 | return -EOPNOTSUPP; | |
3fdadf7d | 1011 | return rawv6_seticmpfilter(sk, level, optname, optval, |
1da177e4 LT |
1012 | optlen); |
1013 | case SOL_IPV6: | |
1014 | if (optname == IPV6_CHECKSUM) | |
1015 | break; | |
1016 | default: | |
3fdadf7d | 1017 | return ipv6_setsockopt(sk, level, optname, optval, |
1da177e4 | 1018 | optlen); |
3ff50b79 SH |
1019 | } |
1020 | ||
3fdadf7d DM |
1021 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1022 | } | |
1023 | ||
1024 | #ifdef CONFIG_COMPAT | |
1025 | static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1026 | char __user *optval, int optlen) |
3fdadf7d | 1027 | { |
543d9cfe ACM |
1028 | switch (level) { |
1029 | case SOL_RAW: | |
1030 | break; | |
1031 | case SOL_ICMPV6: | |
1032 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1033 | return -EOPNOTSUPP; | |
1034 | return rawv6_seticmpfilter(sk, level, optname, optval, optlen); | |
1035 | case SOL_IPV6: | |
1036 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1037 | break; |
543d9cfe ACM |
1038 | default: |
1039 | return compat_ipv6_setsockopt(sk, level, optname, | |
1040 | optval, optlen); | |
3ff50b79 | 1041 | } |
3fdadf7d DM |
1042 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1043 | } | |
1044 | #endif | |
1045 | ||
1046 | static int do_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
1047 | char __user *optval, int __user *optlen) | |
1048 | { | |
1049 | struct raw6_sock *rp = raw6_sk(sk); | |
1050 | int val, len; | |
1da177e4 LT |
1051 | |
1052 | if (get_user(len,optlen)) | |
1053 | return -EFAULT; | |
1054 | ||
1055 | switch (optname) { | |
1056 | case IPV6_CHECKSUM: | |
1057 | if (rp->checksum == 0) | |
1058 | val = -1; | |
1059 | else | |
1060 | val = rp->offset; | |
1061 | break; | |
1062 | ||
1063 | default: | |
1064 | return -ENOPROTOOPT; | |
1065 | } | |
1066 | ||
1067 | len = min_t(unsigned int, sizeof(int), len); | |
1068 | ||
1069 | if (put_user(len, optlen)) | |
1070 | return -EFAULT; | |
1071 | if (copy_to_user(optval,&val,len)) | |
1072 | return -EFAULT; | |
1073 | return 0; | |
1074 | } | |
1075 | ||
3fdadf7d DM |
1076 | static int rawv6_getsockopt(struct sock *sk, int level, int optname, |
1077 | char __user *optval, int __user *optlen) | |
1078 | { | |
1079 | switch(level) { | |
1080 | case SOL_RAW: | |
1081 | break; | |
1082 | ||
1083 | case SOL_ICMPV6: | |
1084 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1085 | return -EOPNOTSUPP; | |
1086 | return rawv6_geticmpfilter(sk, level, optname, optval, | |
1087 | optlen); | |
1088 | case SOL_IPV6: | |
1089 | if (optname == IPV6_CHECKSUM) | |
1090 | break; | |
1091 | default: | |
1092 | return ipv6_getsockopt(sk, level, optname, optval, | |
1093 | optlen); | |
3ff50b79 SH |
1094 | } |
1095 | ||
3fdadf7d DM |
1096 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1097 | } | |
1098 | ||
1099 | #ifdef CONFIG_COMPAT | |
1100 | static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1101 | char __user *optval, int __user *optlen) |
3fdadf7d | 1102 | { |
543d9cfe ACM |
1103 | switch (level) { |
1104 | case SOL_RAW: | |
1105 | break; | |
1106 | case SOL_ICMPV6: | |
1107 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1108 | return -EOPNOTSUPP; | |
1109 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); | |
1110 | case SOL_IPV6: | |
1111 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1112 | break; |
543d9cfe ACM |
1113 | default: |
1114 | return compat_ipv6_getsockopt(sk, level, optname, | |
1115 | optval, optlen); | |
3ff50b79 | 1116 | } |
3fdadf7d DM |
1117 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1118 | } | |
1119 | #endif | |
1120 | ||
1da177e4 LT |
1121 | static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) |
1122 | { | |
1123 | switch(cmd) { | |
1124 | case SIOCOUTQ: | |
1125 | { | |
1126 | int amount = atomic_read(&sk->sk_wmem_alloc); | |
1127 | return put_user(amount, (int __user *)arg); | |
1128 | } | |
1129 | case SIOCINQ: | |
1130 | { | |
1131 | struct sk_buff *skb; | |
1132 | int amount = 0; | |
1133 | ||
e0f9f858 | 1134 | spin_lock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1135 | skb = skb_peek(&sk->sk_receive_queue); |
1136 | if (skb != NULL) | |
27a884dc | 1137 | amount = skb->tail - skb->transport_header; |
e0f9f858 | 1138 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1139 | return put_user(amount, (int __user *)arg); |
1140 | } | |
1141 | ||
1142 | default: | |
1143 | return -ENOIOCTLCMD; | |
1144 | } | |
1145 | } | |
1146 | ||
1147 | static void rawv6_close(struct sock *sk, long timeout) | |
1148 | { | |
1149 | if (inet_sk(sk)->num == IPPROTO_RAW) | |
1150 | ip6_ra_control(sk, -1, NULL); | |
1151 | ||
1152 | sk_common_release(sk); | |
1153 | } | |
1154 | ||
1155 | static int rawv6_init_sk(struct sock *sk) | |
1156 | { | |
f48d5ff1 MN |
1157 | struct raw6_sock *rp = raw6_sk(sk); |
1158 | ||
1159 | switch (inet_sk(sk)->num) { | |
1160 | case IPPROTO_ICMPV6: | |
1da177e4 LT |
1161 | rp->checksum = 1; |
1162 | rp->offset = 2; | |
f48d5ff1 MN |
1163 | break; |
1164 | case IPPROTO_MH: | |
1165 | rp->checksum = 1; | |
1166 | rp->offset = 4; | |
1167 | break; | |
1168 | default: | |
1169 | break; | |
1da177e4 LT |
1170 | } |
1171 | return(0); | |
1172 | } | |
1173 | ||
c5a432f1 ED |
1174 | DEFINE_PROTO_INUSE(rawv6) |
1175 | ||
1da177e4 | 1176 | struct proto rawv6_prot = { |
543d9cfe ACM |
1177 | .name = "RAWv6", |
1178 | .owner = THIS_MODULE, | |
1179 | .close = rawv6_close, | |
1180 | .connect = ip6_datagram_connect, | |
1181 | .disconnect = udp_disconnect, | |
1182 | .ioctl = rawv6_ioctl, | |
1183 | .init = rawv6_init_sk, | |
1184 | .destroy = inet6_destroy_sock, | |
1185 | .setsockopt = rawv6_setsockopt, | |
1186 | .getsockopt = rawv6_getsockopt, | |
1187 | .sendmsg = rawv6_sendmsg, | |
1188 | .recvmsg = rawv6_recvmsg, | |
1189 | .bind = rawv6_bind, | |
1190 | .backlog_rcv = rawv6_rcv_skb, | |
fc8717ba PE |
1191 | .hash = raw_hash_sk, |
1192 | .unhash = raw_unhash_sk, | |
543d9cfe | 1193 | .obj_size = sizeof(struct raw6_sock), |
fc8717ba | 1194 | .h.raw_hash = &raw_v6_hashinfo, |
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 | { | |
3046d767 | 1253 | return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops); |
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, | |
f51d599f | 1261 | .release = seq_release_net, |
1da177e4 LT |
1262 | }; |
1263 | ||
a308da16 | 1264 | static int raw6_init_net(struct net *net) |
1da177e4 | 1265 | { |
a308da16 | 1266 | if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops)) |
1da177e4 | 1267 | return -ENOMEM; |
a308da16 | 1268 | |
1da177e4 LT |
1269 | return 0; |
1270 | } | |
1271 | ||
a308da16 PE |
1272 | static void raw6_exit_net(struct net *net) |
1273 | { | |
1274 | proc_net_remove(net, "raw6"); | |
1275 | } | |
1276 | ||
1277 | static struct pernet_operations raw6_net_ops = { | |
1278 | .init = raw6_init_net, | |
1279 | .exit = raw6_exit_net, | |
1280 | }; | |
1281 | ||
1282 | int __init raw6_proc_init(void) | |
1283 | { | |
1284 | return register_pernet_subsys(&raw6_net_ops); | |
1285 | } | |
1286 | ||
1da177e4 LT |
1287 | void raw6_proc_exit(void) |
1288 | { | |
a308da16 | 1289 | unregister_pernet_subsys(&raw6_net_ops); |
1da177e4 LT |
1290 | } |
1291 | #endif /* CONFIG_PROC_FS */ | |
7f4e4868 DL |
1292 | |
1293 | /* Same as inet6_dgram_ops, sans udp_poll. */ | |
1294 | static const struct proto_ops inet6_sockraw_ops = { | |
1295 | .family = PF_INET6, | |
1296 | .owner = THIS_MODULE, | |
1297 | .release = inet6_release, | |
1298 | .bind = inet6_bind, | |
1299 | .connect = inet_dgram_connect, /* ok */ | |
1300 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
1301 | .accept = sock_no_accept, /* a do nothing */ | |
1302 | .getname = inet6_getname, | |
1303 | .poll = datagram_poll, /* ok */ | |
1304 | .ioctl = inet6_ioctl, /* must change */ | |
1305 | .listen = sock_no_listen, /* ok */ | |
1306 | .shutdown = inet_shutdown, /* ok */ | |
1307 | .setsockopt = sock_common_setsockopt, /* ok */ | |
1308 | .getsockopt = sock_common_getsockopt, /* ok */ | |
1309 | .sendmsg = inet_sendmsg, /* ok */ | |
1310 | .recvmsg = sock_common_recvmsg, /* ok */ | |
1311 | .mmap = sock_no_mmap, | |
1312 | .sendpage = sock_no_sendpage, | |
1313 | #ifdef CONFIG_COMPAT | |
1314 | .compat_setsockopt = compat_sock_common_setsockopt, | |
1315 | .compat_getsockopt = compat_sock_common_getsockopt, | |
1316 | #endif | |
1317 | }; | |
1318 | ||
1319 | static struct inet_protosw rawv6_protosw = { | |
1320 | .type = SOCK_RAW, | |
1321 | .protocol = IPPROTO_IP, /* wild card */ | |
1322 | .prot = &rawv6_prot, | |
1323 | .ops = &inet6_sockraw_ops, | |
1324 | .capability = CAP_NET_RAW, | |
1325 | .no_check = UDP_CSUM_DEFAULT, | |
1326 | .flags = INET_PROTOSW_REUSE, | |
1327 | }; | |
1328 | ||
1329 | int __init rawv6_init(void) | |
1330 | { | |
1331 | int ret; | |
1332 | ||
1333 | ret = inet6_register_protosw(&rawv6_protosw); | |
1334 | if (ret) | |
1335 | goto out; | |
1336 | out: | |
1337 | return ret; | |
1338 | } | |
1339 | ||
09f7709f | 1340 | void rawv6_exit(void) |
7f4e4868 DL |
1341 | { |
1342 | inet6_unregister_protosw(&rawv6_protosw); | |
1343 | } |