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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 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 | { | |
b673e4df | 75 | write_lock_bh(&raw_v6_hashinfo.lock); |
1da177e4 LT |
76 | if (sk_del_node_init(sk)) |
77 | sock_prot_dec_use(sk->sk_prot); | |
b673e4df | 78 | write_unlock_bh(&raw_v6_hashinfo.lock); |
1da177e4 LT |
79 | } |
80 | ||
81 | ||
69d6da0b PE |
82 | static struct sock *__raw_v6_lookup(struct sock *sk, unsigned short num, |
83 | struct in6_addr *loc_addr, struct in6_addr *rmt_addr, int dif) | |
1da177e4 LT |
84 | { |
85 | struct hlist_node *node; | |
86 | int is_multicast = ipv6_addr_is_multicast(loc_addr); | |
87 | ||
88 | sk_for_each_from(sk, node) | |
89 | if (inet_sk(sk)->num == num) { | |
90 | struct ipv6_pinfo *np = inet6_sk(sk); | |
91 | ||
92 | if (!ipv6_addr_any(&np->daddr) && | |
93 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
94 | continue; | |
95 | ||
0bd1b59b AM |
96 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) |
97 | continue; | |
98 | ||
1da177e4 LT |
99 | if (!ipv6_addr_any(&np->rcv_saddr)) { |
100 | if (ipv6_addr_equal(&np->rcv_saddr, loc_addr)) | |
101 | goto found; | |
102 | if (is_multicast && | |
103 | inet6_mc_check(sk, loc_addr, rmt_addr)) | |
104 | goto found; | |
105 | continue; | |
106 | } | |
107 | goto found; | |
108 | } | |
109 | sk = NULL; | |
110 | found: | |
111 | return sk; | |
112 | } | |
113 | ||
114 | /* | |
115 | * 0 - deliver | |
116 | * 1 - block | |
117 | */ | |
118 | static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb) | |
119 | { | |
120 | struct icmp6hdr *icmph; | |
121 | struct raw6_sock *rp = raw6_sk(sk); | |
122 | ||
123 | if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) { | |
124 | __u32 *data = &rp->filter.data[0]; | |
125 | int bit_nr; | |
126 | ||
127 | icmph = (struct icmp6hdr *) skb->data; | |
128 | bit_nr = icmph->icmp6_type; | |
129 | ||
130 | return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0; | |
131 | } | |
132 | return 0; | |
133 | } | |
134 | ||
59fbb3a6 MN |
135 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
136 | static int (*mh_filter)(struct sock *sock, struct sk_buff *skb); | |
137 | ||
138 | int rawv6_mh_filter_register(int (*filter)(struct sock *sock, | |
139 | struct sk_buff *skb)) | |
140 | { | |
141 | rcu_assign_pointer(mh_filter, filter); | |
142 | return 0; | |
143 | } | |
144 | EXPORT_SYMBOL(rawv6_mh_filter_register); | |
145 | ||
146 | int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock, | |
147 | struct sk_buff *skb)) | |
148 | { | |
149 | rcu_assign_pointer(mh_filter, NULL); | |
150 | synchronize_rcu(); | |
151 | return 0; | |
152 | } | |
153 | EXPORT_SYMBOL(rawv6_mh_filter_unregister); | |
154 | ||
155 | #endif | |
156 | ||
1da177e4 LT |
157 | /* |
158 | * demultiplex raw sockets. | |
159 | * (should consider queueing the skb in the sock receive_queue | |
160 | * without calling rawv6.c) | |
161 | * | |
162 | * Caller owns SKB so we must make clones. | |
163 | */ | |
69d6da0b | 164 | static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) |
1da177e4 LT |
165 | { |
166 | struct in6_addr *saddr; | |
167 | struct in6_addr *daddr; | |
168 | struct sock *sk; | |
d13964f4 | 169 | int delivered = 0; |
1da177e4 LT |
170 | __u8 hash; |
171 | ||
0660e03f | 172 | saddr = &ipv6_hdr(skb)->saddr; |
1da177e4 LT |
173 | daddr = saddr + 1; |
174 | ||
175 | hash = nexthdr & (MAX_INET_PROTOS - 1); | |
176 | ||
b673e4df PE |
177 | read_lock(&raw_v6_hashinfo.lock); |
178 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
1da177e4 LT |
179 | |
180 | /* | |
181 | * The first socket found will be delivered after | |
182 | * delivery to transport protocols. | |
183 | */ | |
184 | ||
185 | if (sk == NULL) | |
186 | goto out; | |
187 | ||
2dac4b96 | 188 | sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr, IP6CB(skb)->iif); |
1da177e4 LT |
189 | |
190 | while (sk) { | |
7be96f76 MN |
191 | int filtered; |
192 | ||
d13964f4 | 193 | delivered = 1; |
7be96f76 MN |
194 | switch (nexthdr) { |
195 | case IPPROTO_ICMPV6: | |
196 | filtered = icmpv6_filter(sk, skb); | |
197 | break; | |
59fbb3a6 MN |
198 | |
199 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) | |
7be96f76 | 200 | case IPPROTO_MH: |
59fbb3a6 | 201 | { |
7be96f76 MN |
202 | /* XXX: To validate MH only once for each packet, |
203 | * this is placed here. It should be after checking | |
204 | * xfrm policy, however it doesn't. The checking xfrm | |
205 | * policy is placed in rawv6_rcv() because it is | |
206 | * required for each socket. | |
207 | */ | |
59fbb3a6 MN |
208 | int (*filter)(struct sock *sock, struct sk_buff *skb); |
209 | ||
210 | filter = rcu_dereference(mh_filter); | |
211 | filtered = filter ? filter(sk, skb) : 0; | |
7be96f76 | 212 | break; |
59fbb3a6 | 213 | } |
7be96f76 MN |
214 | #endif |
215 | default: | |
216 | filtered = 0; | |
217 | break; | |
218 | } | |
219 | ||
220 | if (filtered < 0) | |
221 | break; | |
222 | if (filtered == 0) { | |
1da177e4 LT |
223 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); |
224 | ||
225 | /* Not releasing hash table! */ | |
9fb9cbb1 YK |
226 | if (clone) { |
227 | nf_reset(clone); | |
1da177e4 | 228 | rawv6_rcv(sk, clone); |
9fb9cbb1 | 229 | } |
1da177e4 | 230 | } |
0bd1b59b | 231 | sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr, |
2dac4b96 | 232 | IP6CB(skb)->iif); |
1da177e4 LT |
233 | } |
234 | out: | |
b673e4df | 235 | read_unlock(&raw_v6_hashinfo.lock); |
d13964f4 | 236 | return delivered; |
1da177e4 LT |
237 | } |
238 | ||
69d6da0b PE |
239 | int raw6_local_deliver(struct sk_buff *skb, int nexthdr) |
240 | { | |
241 | struct sock *raw_sk; | |
242 | ||
b673e4df | 243 | raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]); |
69d6da0b PE |
244 | if (raw_sk && !ipv6_raw_deliver(skb, nexthdr)) |
245 | raw_sk = NULL; | |
246 | ||
247 | return raw_sk != NULL; | |
248 | } | |
249 | ||
1da177e4 LT |
250 | /* This cleans up af_inet6 a bit. -DaveM */ |
251 | static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
252 | { | |
253 | struct inet_sock *inet = inet_sk(sk); | |
254 | struct ipv6_pinfo *np = inet6_sk(sk); | |
255 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; | |
e69a4adc | 256 | __be32 v4addr = 0; |
1da177e4 LT |
257 | int addr_type; |
258 | int err; | |
259 | ||
260 | if (addr_len < SIN6_LEN_RFC2133) | |
261 | return -EINVAL; | |
262 | addr_type = ipv6_addr_type(&addr->sin6_addr); | |
263 | ||
264 | /* Raw sockets are IPv6 only */ | |
265 | if (addr_type == IPV6_ADDR_MAPPED) | |
266 | return(-EADDRNOTAVAIL); | |
267 | ||
268 | lock_sock(sk); | |
269 | ||
270 | err = -EINVAL; | |
271 | if (sk->sk_state != TCP_CLOSE) | |
272 | goto out; | |
273 | ||
274 | /* Check if the address belongs to the host. */ | |
275 | if (addr_type != IPV6_ADDR_ANY) { | |
276 | struct net_device *dev = NULL; | |
277 | ||
278 | if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
279 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
280 | addr->sin6_scope_id) { | |
281 | /* Override any existing binding, if another | |
282 | * one is supplied by user. | |
283 | */ | |
284 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
285 | } | |
1ab1457c | 286 | |
1da177e4 LT |
287 | /* Binding to link-local address requires an interface */ |
288 | if (!sk->sk_bound_dev_if) | |
289 | goto out; | |
290 | ||
881d966b | 291 | dev = dev_get_by_index(&init_net, sk->sk_bound_dev_if); |
1da177e4 LT |
292 | if (!dev) { |
293 | err = -ENODEV; | |
294 | goto out; | |
295 | } | |
296 | } | |
1ab1457c | 297 | |
1da177e4 LT |
298 | /* ipv4 addr of the socket is invalid. Only the |
299 | * unspecified and mapped address have a v4 equivalent. | |
300 | */ | |
301 | v4addr = LOOPBACK4_IPV6; | |
302 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
303 | err = -EADDRNOTAVAIL; | |
304 | if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) { | |
305 | if (dev) | |
306 | dev_put(dev); | |
307 | goto out; | |
308 | } | |
309 | } | |
310 | if (dev) | |
311 | dev_put(dev); | |
312 | } | |
313 | ||
314 | inet->rcv_saddr = inet->saddr = v4addr; | |
315 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); | |
316 | if (!(addr_type & IPV6_ADDR_MULTICAST)) | |
317 | ipv6_addr_copy(&np->saddr, &addr->sin6_addr); | |
318 | err = 0; | |
319 | out: | |
320 | release_sock(sk); | |
321 | return err; | |
322 | } | |
323 | ||
69d6da0b | 324 | static void rawv6_err(struct sock *sk, struct sk_buff *skb, |
1da177e4 | 325 | struct inet6_skb_parm *opt, |
04ce6909 | 326 | int type, int code, int offset, __be32 info) |
1da177e4 LT |
327 | { |
328 | struct inet_sock *inet = inet_sk(sk); | |
329 | struct ipv6_pinfo *np = inet6_sk(sk); | |
330 | int err; | |
331 | int harderr; | |
332 | ||
333 | /* Report error on raw socket, if: | |
334 | 1. User requested recverr. | |
335 | 2. Socket is connected (otherwise the error indication | |
336 | is useless without recverr and error is hard. | |
337 | */ | |
338 | if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) | |
339 | return; | |
340 | ||
341 | harderr = icmpv6_err_convert(type, code, &err); | |
342 | if (type == ICMPV6_PKT_TOOBIG) | |
343 | harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); | |
344 | ||
345 | if (np->recverr) { | |
346 | u8 *payload = skb->data; | |
347 | if (!inet->hdrincl) | |
348 | payload += offset; | |
349 | ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); | |
350 | } | |
351 | ||
352 | if (np->recverr || harderr) { | |
353 | sk->sk_err = err; | |
354 | sk->sk_error_report(sk); | |
355 | } | |
356 | } | |
357 | ||
69d6da0b PE |
358 | void raw6_icmp_error(struct sk_buff *skb, int nexthdr, |
359 | int type, int code, int inner_offset, __be32 info) | |
360 | { | |
361 | struct sock *sk; | |
362 | int hash; | |
363 | struct in6_addr *saddr, *daddr; | |
364 | ||
b673e4df | 365 | hash = nexthdr & (RAW_HTABLE_SIZE - 1); |
69d6da0b | 366 | |
b673e4df PE |
367 | read_lock(&raw_v6_hashinfo.lock); |
368 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
69d6da0b PE |
369 | if (sk != NULL) { |
370 | saddr = &ipv6_hdr(skb)->saddr; | |
371 | daddr = &ipv6_hdr(skb)->daddr; | |
372 | ||
373 | while ((sk = __raw_v6_lookup(sk, nexthdr, saddr, daddr, | |
374 | IP6CB(skb)->iif))) { | |
375 | rawv6_err(sk, skb, NULL, type, code, | |
376 | inner_offset, info); | |
377 | sk = sk_next(sk); | |
378 | } | |
379 | } | |
b673e4df | 380 | read_unlock(&raw_v6_hashinfo.lock); |
69d6da0b PE |
381 | } |
382 | ||
1da177e4 LT |
383 | static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb) |
384 | { | |
1ab1457c | 385 | if ((raw6_sk(sk)->checksum || sk->sk_filter) && |
fb286bb2 | 386 | skb_checksum_complete(skb)) { |
a92aa318 | 387 | atomic_inc(&sk->sk_drops); |
fb286bb2 HX |
388 | kfree_skb(skb); |
389 | return 0; | |
1da177e4 LT |
390 | } |
391 | ||
392 | /* Charge it to the socket. */ | |
393 | if (sock_queue_rcv_skb(sk,skb)<0) { | |
a92aa318 | 394 | atomic_inc(&sk->sk_drops); |
1da177e4 LT |
395 | kfree_skb(skb); |
396 | return 0; | |
397 | } | |
398 | ||
399 | return 0; | |
400 | } | |
401 | ||
402 | /* | |
1ab1457c | 403 | * This is next to useless... |
1da177e4 | 404 | * if we demultiplex in network layer we don't need the extra call |
1ab1457c YH |
405 | * just to queue the skb... |
406 | * maybe we could have the network decide upon a hint if it | |
1da177e4 LT |
407 | * should call raw_rcv for demultiplexing |
408 | */ | |
409 | int rawv6_rcv(struct sock *sk, struct sk_buff *skb) | |
410 | { | |
411 | struct inet_sock *inet = inet_sk(sk); | |
412 | struct raw6_sock *rp = raw6_sk(sk); | |
413 | ||
1ab1457c | 414 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { |
a92aa318 | 415 | atomic_inc(&sk->sk_drops); |
1ab1457c YH |
416 | kfree_skb(skb); |
417 | return NET_RX_DROP; | |
418 | } | |
1da177e4 LT |
419 | |
420 | if (!rp->checksum) | |
421 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
422 | ||
84fa7933 | 423 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
d56f90a7 | 424 | skb_postpull_rcsum(skb, skb_network_header(skb), |
cfe1fc77 | 425 | skb_network_header_len(skb)); |
0660e03f ACM |
426 | if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
427 | &ipv6_hdr(skb)->daddr, | |
fb286bb2 | 428 | skb->len, inet->num, skb->csum)) |
1da177e4 | 429 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1da177e4 | 430 | } |
60476372 | 431 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
432 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
433 | &ipv6_hdr(skb)->daddr, | |
434 | skb->len, | |
435 | inet->num, 0)); | |
1da177e4 LT |
436 | |
437 | if (inet->hdrincl) { | |
fb286bb2 | 438 | if (skb_checksum_complete(skb)) { |
a92aa318 | 439 | atomic_inc(&sk->sk_drops); |
1da177e4 LT |
440 | kfree_skb(skb); |
441 | return 0; | |
442 | } | |
1da177e4 LT |
443 | } |
444 | ||
445 | rawv6_rcv_skb(sk, skb); | |
446 | return 0; | |
447 | } | |
448 | ||
449 | ||
450 | /* | |
451 | * This should be easy, if there is something there | |
452 | * we return it, otherwise we block. | |
453 | */ | |
454 | ||
455 | static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk, | |
456 | struct msghdr *msg, size_t len, | |
457 | int noblock, int flags, int *addr_len) | |
458 | { | |
459 | struct ipv6_pinfo *np = inet6_sk(sk); | |
460 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name; | |
461 | struct sk_buff *skb; | |
462 | size_t copied; | |
463 | int err; | |
464 | ||
465 | if (flags & MSG_OOB) | |
466 | return -EOPNOTSUPP; | |
1ab1457c YH |
467 | |
468 | if (addr_len) | |
1da177e4 LT |
469 | *addr_len=sizeof(*sin6); |
470 | ||
471 | if (flags & MSG_ERRQUEUE) | |
472 | return ipv6_recv_error(sk, msg, len); | |
473 | ||
474 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
475 | if (!skb) | |
476 | goto out; | |
477 | ||
478 | copied = skb->len; | |
1ab1457c YH |
479 | if (copied > len) { |
480 | copied = len; | |
481 | msg->msg_flags |= MSG_TRUNC; | |
482 | } | |
1da177e4 | 483 | |
60476372 | 484 | if (skb_csum_unnecessary(skb)) { |
1da177e4 LT |
485 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
486 | } else if (msg->msg_flags&MSG_TRUNC) { | |
fb286bb2 | 487 | if (__skb_checksum_complete(skb)) |
1da177e4 LT |
488 | goto csum_copy_err; |
489 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
490 | } else { | |
491 | err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov); | |
492 | if (err == -EINVAL) | |
493 | goto csum_copy_err; | |
494 | } | |
495 | if (err) | |
496 | goto out_free; | |
497 | ||
498 | /* Copy the address. */ | |
499 | if (sin6) { | |
500 | sin6->sin6_family = AF_INET6; | |
f59fc7f3 | 501 | sin6->sin6_port = 0; |
0660e03f | 502 | ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr); |
1da177e4 LT |
503 | sin6->sin6_flowinfo = 0; |
504 | sin6->sin6_scope_id = 0; | |
505 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
506 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
507 | } | |
508 | ||
509 | sock_recv_timestamp(msg, sk, skb); | |
510 | ||
511 | if (np->rxopt.all) | |
512 | datagram_recv_ctl(sk, msg, skb); | |
513 | ||
514 | err = copied; | |
515 | if (flags & MSG_TRUNC) | |
516 | err = skb->len; | |
517 | ||
518 | out_free: | |
519 | skb_free_datagram(sk, skb); | |
520 | out: | |
521 | return err; | |
522 | ||
523 | csum_copy_err: | |
3305b80c | 524 | skb_kill_datagram(sk, skb, flags); |
1da177e4 LT |
525 | |
526 | /* Error for blocking case is chosen to masquerade | |
527 | as some normal condition. | |
528 | */ | |
529 | err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; | |
a92aa318 | 530 | atomic_inc(&sk->sk_drops); |
3305b80c | 531 | goto out; |
1da177e4 LT |
532 | } |
533 | ||
534 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl, | |
357b40a1 | 535 | struct raw6_sock *rp) |
1da177e4 LT |
536 | { |
537 | struct sk_buff *skb; | |
538 | int err = 0; | |
357b40a1 HX |
539 | int offset; |
540 | int len; | |
679a8738 | 541 | int total_len; |
868c86bc AV |
542 | __wsum tmp_csum; |
543 | __sum16 csum; | |
1da177e4 LT |
544 | |
545 | if (!rp->checksum) | |
546 | goto send; | |
547 | ||
548 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
549 | goto out; | |
550 | ||
357b40a1 | 551 | offset = rp->offset; |
d56f90a7 ACM |
552 | total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) - |
553 | skb->data); | |
679a8738 | 554 | if (offset >= total_len - 1) { |
1da177e4 | 555 | err = -EINVAL; |
357b40a1 | 556 | ip6_flush_pending_frames(sk); |
1da177e4 LT |
557 | goto out; |
558 | } | |
559 | ||
560 | /* should be check HW csum miyazawa */ | |
561 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
562 | /* | |
563 | * Only one fragment on the socket. | |
564 | */ | |
565 | tmp_csum = skb->csum; | |
566 | } else { | |
357b40a1 | 567 | struct sk_buff *csum_skb = NULL; |
1da177e4 LT |
568 | tmp_csum = 0; |
569 | ||
570 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
571 | tmp_csum = csum_add(tmp_csum, skb->csum); | |
357b40a1 HX |
572 | |
573 | if (csum_skb) | |
574 | continue; | |
575 | ||
ea2ae17d | 576 | len = skb->len - skb_transport_offset(skb); |
357b40a1 HX |
577 | if (offset >= len) { |
578 | offset -= len; | |
579 | continue; | |
580 | } | |
581 | ||
582 | csum_skb = skb; | |
1da177e4 | 583 | } |
357b40a1 HX |
584 | |
585 | skb = csum_skb; | |
1da177e4 LT |
586 | } |
587 | ||
ea2ae17d | 588 | offset += skb_transport_offset(skb); |
357b40a1 HX |
589 | if (skb_copy_bits(skb, offset, &csum, 2)) |
590 | BUG(); | |
591 | ||
1da177e4 | 592 | /* in case cksum was not initialized */ |
357b40a1 | 593 | if (unlikely(csum)) |
5f92a738 | 594 | tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); |
357b40a1 | 595 | |
868c86bc | 596 | csum = csum_ipv6_magic(&fl->fl6_src, |
357b40a1 | 597 | &fl->fl6_dst, |
679a8738 | 598 | total_len, fl->proto, tmp_csum); |
357b40a1 | 599 | |
f6ab0288 AV |
600 | if (csum == 0 && fl->proto == IPPROTO_UDP) |
601 | csum = CSUM_MANGLED_0; | |
1da177e4 | 602 | |
357b40a1 HX |
603 | if (skb_store_bits(skb, offset, &csum, 2)) |
604 | BUG(); | |
1da177e4 | 605 | |
1da177e4 LT |
606 | send: |
607 | err = ip6_push_pending_frames(sk); | |
608 | out: | |
609 | return err; | |
610 | } | |
611 | ||
612 | static int rawv6_send_hdrinc(struct sock *sk, void *from, int length, | |
1ab1457c | 613 | struct flowi *fl, struct rt6_info *rt, |
1da177e4 LT |
614 | unsigned int flags) |
615 | { | |
3320da89 | 616 | struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 LT |
617 | struct ipv6hdr *iph; |
618 | struct sk_buff *skb; | |
619 | unsigned int hh_len; | |
620 | int err; | |
621 | ||
622 | if (length > rt->u.dst.dev->mtu) { | |
623 | ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu); | |
624 | return -EMSGSIZE; | |
625 | } | |
626 | if (flags&MSG_PROBE) | |
627 | goto out; | |
628 | ||
629 | hh_len = LL_RESERVED_SPACE(rt->u.dst.dev); | |
630 | ||
631 | skb = sock_alloc_send_skb(sk, length+hh_len+15, | |
632 | flags&MSG_DONTWAIT, &err); | |
633 | if (skb == NULL) | |
1ab1457c | 634 | goto error; |
1da177e4 LT |
635 | skb_reserve(skb, hh_len); |
636 | ||
637 | skb->priority = sk->sk_priority; | |
638 | skb->dst = dst_clone(&rt->u.dst); | |
639 | ||
1ced98e8 ACM |
640 | skb_put(skb, length); |
641 | skb_reset_network_header(skb); | |
0660e03f | 642 | iph = ipv6_hdr(skb); |
1da177e4 LT |
643 | |
644 | skb->ip_summed = CHECKSUM_NONE; | |
645 | ||
b0e380b1 | 646 | skb->transport_header = skb->network_header; |
1da177e4 LT |
647 | err = memcpy_fromiovecend((void *)iph, from, 0, length); |
648 | if (err) | |
649 | goto error_fault; | |
650 | ||
a11d206d | 651 | IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS); |
6e23ae2a | 652 | err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev, |
1da177e4 LT |
653 | dst_output); |
654 | if (err > 0) | |
3320da89 | 655 | err = np->recverr ? net_xmit_errno(err) : 0; |
1da177e4 LT |
656 | if (err) |
657 | goto error; | |
658 | out: | |
659 | return 0; | |
660 | ||
661 | error_fault: | |
662 | err = -EFAULT; | |
663 | kfree_skb(skb); | |
664 | error: | |
a11d206d | 665 | IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); |
1ab1457c | 666 | return err; |
1da177e4 LT |
667 | } |
668 | ||
a27b58fe | 669 | static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) |
1da177e4 LT |
670 | { |
671 | struct iovec *iov; | |
672 | u8 __user *type = NULL; | |
673 | u8 __user *code = NULL; | |
6e8f4d48 | 674 | u8 len = 0; |
1da177e4 LT |
675 | int probed = 0; |
676 | int i; | |
677 | ||
678 | if (!msg->msg_iov) | |
a27b58fe | 679 | return 0; |
1da177e4 LT |
680 | |
681 | for (i = 0; i < msg->msg_iovlen; i++) { | |
682 | iov = &msg->msg_iov[i]; | |
683 | if (!iov) | |
684 | continue; | |
685 | ||
686 | switch (fl->proto) { | |
687 | case IPPROTO_ICMPV6: | |
688 | /* check if one-byte field is readable or not. */ | |
689 | if (iov->iov_base && iov->iov_len < 1) | |
690 | break; | |
691 | ||
692 | if (!type) { | |
693 | type = iov->iov_base; | |
694 | /* check if code field is readable or not. */ | |
695 | if (iov->iov_len > 1) | |
696 | code = type + 1; | |
697 | } else if (!code) | |
698 | code = iov->iov_base; | |
699 | ||
700 | if (type && code) { | |
a27b58fe HC |
701 | if (get_user(fl->fl_icmp_type, type) || |
702 | get_user(fl->fl_icmp_code, code)) | |
703 | return -EFAULT; | |
1da177e4 LT |
704 | probed = 1; |
705 | } | |
706 | break; | |
6e8f4d48 MN |
707 | case IPPROTO_MH: |
708 | if (iov->iov_base && iov->iov_len < 1) | |
709 | break; | |
710 | /* check if type field is readable or not. */ | |
711 | if (iov->iov_len > 2 - len) { | |
712 | u8 __user *p = iov->iov_base; | |
a27b58fe HC |
713 | if (get_user(fl->fl_mh_type, &p[2 - len])) |
714 | return -EFAULT; | |
6e8f4d48 MN |
715 | probed = 1; |
716 | } else | |
717 | len += iov->iov_len; | |
718 | ||
719 | break; | |
1da177e4 LT |
720 | default: |
721 | probed = 1; | |
722 | break; | |
723 | } | |
724 | if (probed) | |
725 | break; | |
726 | } | |
a27b58fe | 727 | return 0; |
1da177e4 LT |
728 | } |
729 | ||
730 | static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, | |
731 | struct msghdr *msg, size_t len) | |
732 | { | |
733 | struct ipv6_txoptions opt_space; | |
734 | struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
735 | struct in6_addr *daddr, *final_p = NULL, final; | |
736 | struct inet_sock *inet = inet_sk(sk); | |
737 | struct ipv6_pinfo *np = inet6_sk(sk); | |
738 | struct raw6_sock *rp = raw6_sk(sk); | |
739 | struct ipv6_txoptions *opt = NULL; | |
740 | struct ip6_flowlabel *flowlabel = NULL; | |
741 | struct dst_entry *dst = NULL; | |
742 | struct flowi fl; | |
743 | int addr_len = msg->msg_namelen; | |
744 | int hlimit = -1; | |
41a1f8ea | 745 | int tclass = -1; |
1da177e4 LT |
746 | u16 proto; |
747 | int err; | |
748 | ||
749 | /* Rough check on arithmetic overflow, | |
b59e139b | 750 | better check is made in ip6_append_data(). |
1da177e4 | 751 | */ |
b59e139b | 752 | if (len > INT_MAX) |
1da177e4 LT |
753 | return -EMSGSIZE; |
754 | ||
755 | /* Mirror BSD error message compatibility */ | |
1ab1457c | 756 | if (msg->msg_flags & MSG_OOB) |
1da177e4 LT |
757 | return -EOPNOTSUPP; |
758 | ||
759 | /* | |
1ab1457c | 760 | * Get and verify the address. |
1da177e4 LT |
761 | */ |
762 | memset(&fl, 0, sizeof(fl)); | |
763 | ||
764 | if (sin6) { | |
1ab1457c | 765 | if (addr_len < SIN6_LEN_RFC2133) |
1da177e4 LT |
766 | return -EINVAL; |
767 | ||
1ab1457c | 768 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) |
1da177e4 LT |
769 | return(-EAFNOSUPPORT); |
770 | ||
771 | /* port is the proto value [0..255] carried in nexthdr */ | |
772 | proto = ntohs(sin6->sin6_port); | |
773 | ||
774 | if (!proto) | |
775 | proto = inet->num; | |
776 | else if (proto != inet->num) | |
777 | return(-EINVAL); | |
778 | ||
779 | if (proto > 255) | |
780 | return(-EINVAL); | |
781 | ||
782 | daddr = &sin6->sin6_addr; | |
783 | if (np->sndflow) { | |
784 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; | |
785 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
786 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
787 | if (flowlabel == NULL) | |
788 | return -EINVAL; | |
789 | daddr = &flowlabel->dst; | |
790 | } | |
791 | } | |
792 | ||
793 | /* | |
794 | * Otherwise it will be difficult to maintain | |
795 | * sk->sk_dst_cache. | |
796 | */ | |
797 | if (sk->sk_state == TCP_ESTABLISHED && | |
798 | ipv6_addr_equal(daddr, &np->daddr)) | |
799 | daddr = &np->daddr; | |
800 | ||
801 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
802 | sin6->sin6_scope_id && | |
803 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
804 | fl.oif = sin6->sin6_scope_id; | |
805 | } else { | |
1ab1457c | 806 | if (sk->sk_state != TCP_ESTABLISHED) |
1da177e4 | 807 | return -EDESTADDRREQ; |
1ab1457c | 808 | |
1da177e4 LT |
809 | proto = inet->num; |
810 | daddr = &np->daddr; | |
811 | fl.fl6_flowlabel = np->flow_label; | |
812 | } | |
813 | ||
814 | if (ipv6_addr_any(daddr)) { | |
1ab1457c YH |
815 | /* |
816 | * unspecified destination address | |
1da177e4 LT |
817 | * treated as error... is this correct ? |
818 | */ | |
819 | fl6_sock_release(flowlabel); | |
820 | return(-EINVAL); | |
821 | } | |
822 | ||
823 | if (fl.oif == 0) | |
824 | fl.oif = sk->sk_bound_dev_if; | |
825 | ||
826 | if (msg->msg_controllen) { | |
827 | opt = &opt_space; | |
828 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
829 | opt->tot_len = sizeof(struct ipv6_txoptions); | |
830 | ||
41a1f8ea | 831 | err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
832 | if (err < 0) { |
833 | fl6_sock_release(flowlabel); | |
834 | return err; | |
835 | } | |
836 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { | |
837 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
838 | if (flowlabel == NULL) | |
839 | return -EINVAL; | |
840 | } | |
841 | if (!(opt->opt_nflen|opt->opt_flen)) | |
842 | opt = NULL; | |
843 | } | |
844 | if (opt == NULL) | |
845 | opt = np->opt; | |
df9890c3 YH |
846 | if (flowlabel) |
847 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
848 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 LT |
849 | |
850 | fl.proto = proto; | |
a27b58fe HC |
851 | err = rawv6_probe_proto_opt(&fl, msg); |
852 | if (err) | |
853 | goto out; | |
1ab1457c | 854 | |
1da177e4 LT |
855 | ipv6_addr_copy(&fl.fl6_dst, daddr); |
856 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) | |
857 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
858 | ||
859 | /* merge ip6_build_xmit from ip6_output */ | |
860 | if (opt && opt->srcrt) { | |
861 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
862 | ipv6_addr_copy(&final, &fl.fl6_dst); | |
863 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
864 | final_p = &final; | |
865 | } | |
866 | ||
867 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) | |
868 | fl.oif = np->mcast_oif; | |
beb8d13b | 869 | security_sk_classify_flow(sk, &fl); |
1da177e4 LT |
870 | |
871 | err = ip6_dst_lookup(sk, &dst, &fl); | |
872 | if (err) | |
873 | goto out; | |
874 | if (final_p) | |
875 | ipv6_addr_copy(&fl.fl6_dst, final_p); | |
876 | ||
14e50e57 DM |
877 | if ((err = __xfrm_lookup(&dst, &fl, sk, 1)) < 0) { |
878 | if (err == -EREMOTE) | |
879 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
880 | if (err < 0) | |
881 | goto out; | |
882 | } | |
1da177e4 LT |
883 | |
884 | if (hlimit < 0) { | |
885 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) | |
886 | hlimit = np->mcast_hops; | |
887 | else | |
888 | hlimit = np->hop_limit; | |
889 | if (hlimit < 0) | |
890 | hlimit = dst_metric(dst, RTAX_HOPLIMIT); | |
891 | if (hlimit < 0) | |
892 | hlimit = ipv6_get_hoplimit(dst->dev); | |
893 | } | |
894 | ||
41a1f8ea | 895 | if (tclass < 0) { |
e012d51c | 896 | tclass = np->tclass; |
41a1f8ea YH |
897 | if (tclass < 0) |
898 | tclass = 0; | |
899 | } | |
900 | ||
1da177e4 LT |
901 | if (msg->msg_flags&MSG_CONFIRM) |
902 | goto do_confirm; | |
903 | ||
904 | back_from_confirm: | |
905 | if (inet->hdrincl) { | |
906 | err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags); | |
907 | } else { | |
908 | lock_sock(sk); | |
41a1f8ea YH |
909 | err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, |
910 | len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst, | |
911 | msg->msg_flags); | |
1da177e4 LT |
912 | |
913 | if (err) | |
914 | ip6_flush_pending_frames(sk); | |
915 | else if (!(msg->msg_flags & MSG_MORE)) | |
357b40a1 | 916 | err = rawv6_push_pending_frames(sk, &fl, rp); |
3ef9d943 | 917 | release_sock(sk); |
1da177e4 LT |
918 | } |
919 | done: | |
6d3e85ec | 920 | dst_release(dst); |
1ab1457c | 921 | out: |
1da177e4 LT |
922 | fl6_sock_release(flowlabel); |
923 | return err<0?err:len; | |
924 | do_confirm: | |
925 | dst_confirm(dst); | |
926 | if (!(msg->msg_flags & MSG_PROBE) || len) | |
927 | goto back_from_confirm; | |
928 | err = 0; | |
929 | goto done; | |
930 | } | |
931 | ||
1ab1457c | 932 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
933 | char __user *optval, int optlen) |
934 | { | |
935 | switch (optname) { | |
936 | case ICMPV6_FILTER: | |
937 | if (optlen > sizeof(struct icmp6_filter)) | |
938 | optlen = sizeof(struct icmp6_filter); | |
939 | if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) | |
940 | return -EFAULT; | |
941 | return 0; | |
942 | default: | |
943 | return -ENOPROTOOPT; | |
3ff50b79 | 944 | } |
1da177e4 LT |
945 | |
946 | return 0; | |
947 | } | |
948 | ||
1ab1457c | 949 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
950 | char __user *optval, int __user *optlen) |
951 | { | |
952 | int len; | |
953 | ||
954 | switch (optname) { | |
955 | case ICMPV6_FILTER: | |
956 | if (get_user(len, optlen)) | |
957 | return -EFAULT; | |
958 | if (len < 0) | |
959 | return -EINVAL; | |
960 | if (len > sizeof(struct icmp6_filter)) | |
961 | len = sizeof(struct icmp6_filter); | |
962 | if (put_user(len, optlen)) | |
963 | return -EFAULT; | |
964 | if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) | |
965 | return -EFAULT; | |
966 | return 0; | |
967 | default: | |
968 | return -ENOPROTOOPT; | |
3ff50b79 | 969 | } |
1da177e4 LT |
970 | |
971 | return 0; | |
972 | } | |
973 | ||
974 | ||
3fdadf7d | 975 | static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
976 | char __user *optval, int optlen) |
977 | { | |
978 | struct raw6_sock *rp = raw6_sk(sk); | |
979 | int val; | |
980 | ||
1ab1457c | 981 | if (get_user(val, (int __user *)optval)) |
1da177e4 LT |
982 | return -EFAULT; |
983 | ||
984 | switch (optname) { | |
985 | case IPV6_CHECKSUM: | |
986 | /* You may get strange result with a positive odd offset; | |
987 | RFC2292bis agrees with me. */ | |
988 | if (val > 0 && (val&1)) | |
989 | return(-EINVAL); | |
990 | if (val < 0) { | |
991 | rp->checksum = 0; | |
992 | } else { | |
993 | rp->checksum = 1; | |
994 | rp->offset = val; | |
995 | } | |
996 | ||
997 | return 0; | |
998 | break; | |
999 | ||
1000 | default: | |
1001 | return(-ENOPROTOOPT); | |
1002 | } | |
1003 | } | |
1004 | ||
3fdadf7d DM |
1005 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, |
1006 | char __user *optval, int optlen) | |
1da177e4 | 1007 | { |
1da177e4 LT |
1008 | switch(level) { |
1009 | case SOL_RAW: | |
1010 | break; | |
1011 | ||
1012 | case SOL_ICMPV6: | |
1013 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1014 | return -EOPNOTSUPP; | |
3fdadf7d | 1015 | return rawv6_seticmpfilter(sk, level, optname, optval, |
1da177e4 LT |
1016 | optlen); |
1017 | case SOL_IPV6: | |
1018 | if (optname == IPV6_CHECKSUM) | |
1019 | break; | |
1020 | default: | |
3fdadf7d | 1021 | return ipv6_setsockopt(sk, level, optname, optval, |
1da177e4 | 1022 | optlen); |
3ff50b79 SH |
1023 | } |
1024 | ||
3fdadf7d DM |
1025 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1026 | } | |
1027 | ||
1028 | #ifdef CONFIG_COMPAT | |
1029 | static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1030 | char __user *optval, int optlen) |
3fdadf7d | 1031 | { |
543d9cfe ACM |
1032 | switch (level) { |
1033 | case SOL_RAW: | |
1034 | break; | |
1035 | case SOL_ICMPV6: | |
1036 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1037 | return -EOPNOTSUPP; | |
1038 | return rawv6_seticmpfilter(sk, level, optname, optval, optlen); | |
1039 | case SOL_IPV6: | |
1040 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1041 | break; |
543d9cfe ACM |
1042 | default: |
1043 | return compat_ipv6_setsockopt(sk, level, optname, | |
1044 | optval, optlen); | |
3ff50b79 | 1045 | } |
3fdadf7d DM |
1046 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1047 | } | |
1048 | #endif | |
1049 | ||
1050 | static int do_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
1051 | char __user *optval, int __user *optlen) | |
1052 | { | |
1053 | struct raw6_sock *rp = raw6_sk(sk); | |
1054 | int val, len; | |
1da177e4 LT |
1055 | |
1056 | if (get_user(len,optlen)) | |
1057 | return -EFAULT; | |
1058 | ||
1059 | switch (optname) { | |
1060 | case IPV6_CHECKSUM: | |
1061 | if (rp->checksum == 0) | |
1062 | val = -1; | |
1063 | else | |
1064 | val = rp->offset; | |
1065 | break; | |
1066 | ||
1067 | default: | |
1068 | return -ENOPROTOOPT; | |
1069 | } | |
1070 | ||
1071 | len = min_t(unsigned int, sizeof(int), len); | |
1072 | ||
1073 | if (put_user(len, optlen)) | |
1074 | return -EFAULT; | |
1075 | if (copy_to_user(optval,&val,len)) | |
1076 | return -EFAULT; | |
1077 | return 0; | |
1078 | } | |
1079 | ||
3fdadf7d DM |
1080 | static int rawv6_getsockopt(struct sock *sk, int level, int optname, |
1081 | char __user *optval, int __user *optlen) | |
1082 | { | |
1083 | switch(level) { | |
1084 | case SOL_RAW: | |
1085 | break; | |
1086 | ||
1087 | case SOL_ICMPV6: | |
1088 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1089 | return -EOPNOTSUPP; | |
1090 | return rawv6_geticmpfilter(sk, level, optname, optval, | |
1091 | optlen); | |
1092 | case SOL_IPV6: | |
1093 | if (optname == IPV6_CHECKSUM) | |
1094 | break; | |
1095 | default: | |
1096 | return ipv6_getsockopt(sk, level, optname, optval, | |
1097 | optlen); | |
3ff50b79 SH |
1098 | } |
1099 | ||
3fdadf7d DM |
1100 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1101 | } | |
1102 | ||
1103 | #ifdef CONFIG_COMPAT | |
1104 | static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1105 | char __user *optval, int __user *optlen) |
3fdadf7d | 1106 | { |
543d9cfe ACM |
1107 | switch (level) { |
1108 | case SOL_RAW: | |
1109 | break; | |
1110 | case SOL_ICMPV6: | |
1111 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1112 | return -EOPNOTSUPP; | |
1113 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); | |
1114 | case SOL_IPV6: | |
1115 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1116 | break; |
543d9cfe ACM |
1117 | default: |
1118 | return compat_ipv6_getsockopt(sk, level, optname, | |
1119 | optval, optlen); | |
3ff50b79 | 1120 | } |
3fdadf7d DM |
1121 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1122 | } | |
1123 | #endif | |
1124 | ||
1da177e4 LT |
1125 | static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) |
1126 | { | |
1127 | switch(cmd) { | |
1128 | case SIOCOUTQ: | |
1129 | { | |
1130 | int amount = atomic_read(&sk->sk_wmem_alloc); | |
1131 | return put_user(amount, (int __user *)arg); | |
1132 | } | |
1133 | case SIOCINQ: | |
1134 | { | |
1135 | struct sk_buff *skb; | |
1136 | int amount = 0; | |
1137 | ||
e0f9f858 | 1138 | spin_lock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1139 | skb = skb_peek(&sk->sk_receive_queue); |
1140 | if (skb != NULL) | |
27a884dc | 1141 | amount = skb->tail - skb->transport_header; |
e0f9f858 | 1142 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1143 | return put_user(amount, (int __user *)arg); |
1144 | } | |
1145 | ||
1146 | default: | |
1147 | return -ENOIOCTLCMD; | |
1148 | } | |
1149 | } | |
1150 | ||
1151 | static void rawv6_close(struct sock *sk, long timeout) | |
1152 | { | |
1153 | if (inet_sk(sk)->num == IPPROTO_RAW) | |
1154 | ip6_ra_control(sk, -1, NULL); | |
1155 | ||
1156 | sk_common_release(sk); | |
1157 | } | |
1158 | ||
1159 | static int rawv6_init_sk(struct sock *sk) | |
1160 | { | |
f48d5ff1 MN |
1161 | struct raw6_sock *rp = raw6_sk(sk); |
1162 | ||
1163 | switch (inet_sk(sk)->num) { | |
1164 | case IPPROTO_ICMPV6: | |
1da177e4 LT |
1165 | rp->checksum = 1; |
1166 | rp->offset = 2; | |
f48d5ff1 MN |
1167 | break; |
1168 | case IPPROTO_MH: | |
1169 | rp->checksum = 1; | |
1170 | rp->offset = 4; | |
1171 | break; | |
1172 | default: | |
1173 | break; | |
1da177e4 LT |
1174 | } |
1175 | return(0); | |
1176 | } | |
1177 | ||
c5a432f1 ED |
1178 | DEFINE_PROTO_INUSE(rawv6) |
1179 | ||
1da177e4 | 1180 | struct proto rawv6_prot = { |
543d9cfe ACM |
1181 | .name = "RAWv6", |
1182 | .owner = THIS_MODULE, | |
1183 | .close = rawv6_close, | |
1184 | .connect = ip6_datagram_connect, | |
1185 | .disconnect = udp_disconnect, | |
1186 | .ioctl = rawv6_ioctl, | |
1187 | .init = rawv6_init_sk, | |
1188 | .destroy = inet6_destroy_sock, | |
1189 | .setsockopt = rawv6_setsockopt, | |
1190 | .getsockopt = rawv6_getsockopt, | |
1191 | .sendmsg = rawv6_sendmsg, | |
1192 | .recvmsg = rawv6_recvmsg, | |
1193 | .bind = rawv6_bind, | |
1194 | .backlog_rcv = rawv6_rcv_skb, | |
1195 | .hash = raw_v6_hash, | |
1196 | .unhash = raw_v6_unhash, | |
1197 | .obj_size = sizeof(struct raw6_sock), | |
3fdadf7d | 1198 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1199 | .compat_setsockopt = compat_rawv6_setsockopt, |
1200 | .compat_getsockopt = compat_rawv6_getsockopt, | |
3fdadf7d | 1201 | #endif |
c5a432f1 | 1202 | REF_PROTO_INUSE(rawv6) |
1da177e4 LT |
1203 | }; |
1204 | ||
1205 | #ifdef CONFIG_PROC_FS | |
1206 | struct raw6_iter_state { | |
1207 | int bucket; | |
1208 | }; | |
1209 | ||
1210 | #define raw6_seq_private(seq) ((struct raw6_iter_state *)(seq)->private) | |
1211 | ||
1212 | static struct sock *raw6_get_first(struct seq_file *seq) | |
1213 | { | |
1214 | struct sock *sk; | |
1215 | struct hlist_node *node; | |
1216 | struct raw6_iter_state* state = raw6_seq_private(seq); | |
1217 | ||
b673e4df PE |
1218 | for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE; |
1219 | ++state->bucket) | |
1220 | sk_for_each(sk, node, &raw_v6_hashinfo.ht[state->bucket]) | |
1da177e4 LT |
1221 | if (sk->sk_family == PF_INET6) |
1222 | goto out; | |
1223 | sk = NULL; | |
1224 | out: | |
1225 | return sk; | |
1226 | } | |
1227 | ||
1228 | static struct sock *raw6_get_next(struct seq_file *seq, struct sock *sk) | |
1229 | { | |
1230 | struct raw6_iter_state* state = raw6_seq_private(seq); | |
1231 | ||
1232 | do { | |
1233 | sk = sk_next(sk); | |
1234 | try_again: | |
1235 | ; | |
1236 | } while (sk && sk->sk_family != PF_INET6); | |
1237 | ||
b673e4df PE |
1238 | if (!sk && ++state->bucket < RAW_HTABLE_SIZE) { |
1239 | sk = sk_head(&raw_v6_hashinfo.ht[state->bucket]); | |
1da177e4 LT |
1240 | goto try_again; |
1241 | } | |
1242 | return sk; | |
1243 | } | |
1244 | ||
1245 | static struct sock *raw6_get_idx(struct seq_file *seq, loff_t pos) | |
1246 | { | |
1247 | struct sock *sk = raw6_get_first(seq); | |
1248 | if (sk) | |
1249 | while (pos && (sk = raw6_get_next(seq, sk)) != NULL) | |
1250 | --pos; | |
1251 | return pos ? NULL : sk; | |
1252 | } | |
1253 | ||
1254 | static void *raw6_seq_start(struct seq_file *seq, loff_t *pos) | |
1255 | { | |
b673e4df | 1256 | read_lock(&raw_v6_hashinfo.lock); |
1da177e4 LT |
1257 | return *pos ? raw6_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
1258 | } | |
1259 | ||
1260 | static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1261 | { | |
1262 | struct sock *sk; | |
1263 | ||
1264 | if (v == SEQ_START_TOKEN) | |
1265 | sk = raw6_get_first(seq); | |
1266 | else | |
1267 | sk = raw6_get_next(seq, v); | |
1268 | ++*pos; | |
1269 | return sk; | |
1270 | } | |
1271 | ||
1272 | static void raw6_seq_stop(struct seq_file *seq, void *v) | |
1273 | { | |
b673e4df | 1274 | read_unlock(&raw_v6_hashinfo.lock); |
1da177e4 LT |
1275 | } |
1276 | ||
1277 | static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) | |
1278 | { | |
1279 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1280 | struct in6_addr *dest, *src; | |
1281 | __u16 destp, srcp; | |
1282 | ||
1283 | dest = &np->daddr; | |
1284 | src = &np->rcv_saddr; | |
1285 | destp = 0; | |
1286 | srcp = inet_sk(sp)->num; | |
1287 | seq_printf(seq, | |
1288 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
a92aa318 | 1289 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1da177e4 LT |
1290 | i, |
1291 | src->s6_addr32[0], src->s6_addr32[1], | |
1292 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1293 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1294 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1295 | sp->sk_state, |
1da177e4 LT |
1296 | atomic_read(&sp->sk_wmem_alloc), |
1297 | atomic_read(&sp->sk_rmem_alloc), | |
1298 | 0, 0L, 0, | |
1299 | sock_i_uid(sp), 0, | |
1300 | sock_i_ino(sp), | |
a92aa318 | 1301 | atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); |
1da177e4 LT |
1302 | } |
1303 | ||
1304 | static int raw6_seq_show(struct seq_file *seq, void *v) | |
1305 | { | |
1306 | if (v == SEQ_START_TOKEN) | |
1307 | seq_printf(seq, | |
1308 | " sl " | |
1309 | "local_address " | |
1310 | "remote_address " | |
1311 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
a92aa318 | 1312 | " uid timeout inode drops\n"); |
1da177e4 LT |
1313 | else |
1314 | raw6_sock_seq_show(seq, v, raw6_seq_private(seq)->bucket); | |
1315 | return 0; | |
1316 | } | |
1317 | ||
56b3d975 | 1318 | static const struct seq_operations raw6_seq_ops = { |
1da177e4 LT |
1319 | .start = raw6_seq_start, |
1320 | .next = raw6_seq_next, | |
1321 | .stop = raw6_seq_stop, | |
1322 | .show = raw6_seq_show, | |
1323 | }; | |
1324 | ||
1325 | static int raw6_seq_open(struct inode *inode, struct file *file) | |
1326 | { | |
cf7732e4 PE |
1327 | return seq_open_private(file, &raw6_seq_ops, |
1328 | sizeof(struct raw6_iter_state)); | |
1da177e4 LT |
1329 | } |
1330 | ||
9a32144e | 1331 | static const struct file_operations raw6_seq_fops = { |
1da177e4 LT |
1332 | .owner = THIS_MODULE, |
1333 | .open = raw6_seq_open, | |
1334 | .read = seq_read, | |
1335 | .llseek = seq_lseek, | |
1336 | .release = seq_release_private, | |
1337 | }; | |
1338 | ||
1339 | int __init raw6_proc_init(void) | |
1340 | { | |
457c4cbc | 1341 | if (!proc_net_fops_create(&init_net, "raw6", S_IRUGO, &raw6_seq_fops)) |
1da177e4 LT |
1342 | return -ENOMEM; |
1343 | return 0; | |
1344 | } | |
1345 | ||
1346 | void raw6_proc_exit(void) | |
1347 | { | |
457c4cbc | 1348 | proc_net_remove(&init_net, "raw6"); |
1da177e4 LT |
1349 | } |
1350 | #endif /* CONFIG_PROC_FS */ |