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 | * | |
1da177e4 LT |
10 | * Fixes: |
11 | * Hideaki YOSHIFUJI : sin6_scope_id support | |
1ab1457c | 12 | * YOSHIFUJI,H.@USAGI : raw checksum (RFC2292(bis) compliance) |
1da177e4 LT |
13 | * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data |
14 | * | |
15 | * This program is free software; you can redistribute it and/or | |
16 | * modify it under the terms of the GNU General Public License | |
17 | * as published by the Free Software Foundation; either version | |
18 | * 2 of the License, or (at your option) any later version. | |
19 | */ | |
20 | ||
21 | #include <linux/errno.h> | |
22 | #include <linux/types.h> | |
23 | #include <linux/socket.h> | |
24 | #include <linux/sockios.h> | |
1da177e4 LT |
25 | #include <linux/net.h> |
26 | #include <linux/in6.h> | |
27 | #include <linux/netdevice.h> | |
28 | #include <linux/if_arp.h> | |
29 | #include <linux/icmpv6.h> | |
30 | #include <linux/netfilter.h> | |
31 | #include <linux/netfilter_ipv6.h> | |
3305b80c | 32 | #include <linux/skbuff.h> |
1da177e4 LT |
33 | #include <asm/uaccess.h> |
34 | #include <asm/ioctls.h> | |
35 | ||
457c4cbc | 36 | #include <net/net_namespace.h> |
1da177e4 LT |
37 | #include <net/ip.h> |
38 | #include <net/sock.h> | |
39 | #include <net/snmp.h> | |
40 | ||
41 | #include <net/ipv6.h> | |
42 | #include <net/ndisc.h> | |
43 | #include <net/protocol.h> | |
44 | #include <net/ip6_route.h> | |
45 | #include <net/ip6_checksum.h> | |
46 | #include <net/addrconf.h> | |
47 | #include <net/transp_v6.h> | |
48 | #include <net/udp.h> | |
49 | #include <net/inet_common.h> | |
c752f073 | 50 | #include <net/tcp_states.h> |
59fbb3a6 | 51 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
7be96f76 MN |
52 | #include <net/mip6.h> |
53 | #endif | |
7bc570c8 | 54 | #include <linux/mroute6.h> |
1da177e4 | 55 | |
b673e4df | 56 | #include <net/raw.h> |
1da177e4 LT |
57 | #include <net/rawv6.h> |
58 | #include <net/xfrm.h> | |
59 | ||
60 | #include <linux/proc_fs.h> | |
61 | #include <linux/seq_file.h> | |
62 | ||
b673e4df | 63 | static struct raw_hashinfo raw_v6_hashinfo = { |
938b93ad | 64 | .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock), |
b673e4df | 65 | }; |
1da177e4 | 66 | |
be185884 PE |
67 | static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk, |
68 | unsigned short num, struct in6_addr *loc_addr, | |
69 | struct in6_addr *rmt_addr, int dif) | |
1da177e4 LT |
70 | { |
71 | struct hlist_node *node; | |
72 | int is_multicast = ipv6_addr_is_multicast(loc_addr); | |
73 | ||
74 | sk_for_each_from(sk, node) | |
75 | if (inet_sk(sk)->num == num) { | |
76 | struct ipv6_pinfo *np = inet6_sk(sk); | |
77 | ||
878628fb | 78 | if (!net_eq(sock_net(sk), net)) |
be185884 PE |
79 | continue; |
80 | ||
1da177e4 LT |
81 | if (!ipv6_addr_any(&np->daddr) && |
82 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
83 | continue; | |
84 | ||
0bd1b59b AM |
85 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) |
86 | continue; | |
87 | ||
1da177e4 LT |
88 | if (!ipv6_addr_any(&np->rcv_saddr)) { |
89 | if (ipv6_addr_equal(&np->rcv_saddr, loc_addr)) | |
90 | goto found; | |
91 | if (is_multicast && | |
92 | inet6_mc_check(sk, loc_addr, rmt_addr)) | |
93 | goto found; | |
94 | continue; | |
95 | } | |
96 | goto found; | |
97 | } | |
98 | sk = NULL; | |
99 | found: | |
100 | return sk; | |
101 | } | |
102 | ||
103 | /* | |
104 | * 0 - deliver | |
105 | * 1 - block | |
106 | */ | |
107 | static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb) | |
108 | { | |
109 | struct icmp6hdr *icmph; | |
110 | struct raw6_sock *rp = raw6_sk(sk); | |
111 | ||
112 | if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) { | |
113 | __u32 *data = &rp->filter.data[0]; | |
114 | int bit_nr; | |
115 | ||
116 | icmph = (struct icmp6hdr *) skb->data; | |
117 | bit_nr = icmph->icmp6_type; | |
118 | ||
119 | return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0; | |
120 | } | |
121 | return 0; | |
122 | } | |
123 | ||
59fbb3a6 MN |
124 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
125 | static int (*mh_filter)(struct sock *sock, struct sk_buff *skb); | |
126 | ||
127 | int rawv6_mh_filter_register(int (*filter)(struct sock *sock, | |
128 | struct sk_buff *skb)) | |
129 | { | |
130 | rcu_assign_pointer(mh_filter, filter); | |
131 | return 0; | |
132 | } | |
133 | EXPORT_SYMBOL(rawv6_mh_filter_register); | |
134 | ||
135 | int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock, | |
136 | struct sk_buff *skb)) | |
137 | { | |
138 | rcu_assign_pointer(mh_filter, NULL); | |
139 | synchronize_rcu(); | |
140 | return 0; | |
141 | } | |
142 | EXPORT_SYMBOL(rawv6_mh_filter_unregister); | |
143 | ||
144 | #endif | |
145 | ||
1da177e4 LT |
146 | /* |
147 | * demultiplex raw sockets. | |
148 | * (should consider queueing the skb in the sock receive_queue | |
149 | * without calling rawv6.c) | |
150 | * | |
151 | * Caller owns SKB so we must make clones. | |
152 | */ | |
69d6da0b | 153 | static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) |
1da177e4 LT |
154 | { |
155 | struct in6_addr *saddr; | |
156 | struct in6_addr *daddr; | |
157 | struct sock *sk; | |
d13964f4 | 158 | int delivered = 0; |
1da177e4 | 159 | __u8 hash; |
be185884 | 160 | struct net *net; |
1da177e4 | 161 | |
0660e03f | 162 | saddr = &ipv6_hdr(skb)->saddr; |
1da177e4 LT |
163 | daddr = saddr + 1; |
164 | ||
165 | hash = nexthdr & (MAX_INET_PROTOS - 1); | |
166 | ||
b673e4df PE |
167 | read_lock(&raw_v6_hashinfo.lock); |
168 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
1da177e4 | 169 | |
1da177e4 LT |
170 | if (sk == NULL) |
171 | goto out; | |
172 | ||
c346dca1 | 173 | net = dev_net(skb->dev); |
be185884 | 174 | sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif); |
1da177e4 LT |
175 | |
176 | while (sk) { | |
7be96f76 MN |
177 | int filtered; |
178 | ||
d13964f4 | 179 | delivered = 1; |
7be96f76 MN |
180 | switch (nexthdr) { |
181 | case IPPROTO_ICMPV6: | |
182 | filtered = icmpv6_filter(sk, skb); | |
183 | break; | |
59fbb3a6 MN |
184 | |
185 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) | |
7be96f76 | 186 | case IPPROTO_MH: |
59fbb3a6 | 187 | { |
7be96f76 MN |
188 | /* XXX: To validate MH only once for each packet, |
189 | * this is placed here. It should be after checking | |
190 | * xfrm policy, however it doesn't. The checking xfrm | |
191 | * policy is placed in rawv6_rcv() because it is | |
192 | * required for each socket. | |
193 | */ | |
59fbb3a6 MN |
194 | int (*filter)(struct sock *sock, struct sk_buff *skb); |
195 | ||
196 | filter = rcu_dereference(mh_filter); | |
197 | filtered = filter ? filter(sk, skb) : 0; | |
7be96f76 | 198 | break; |
59fbb3a6 | 199 | } |
7be96f76 MN |
200 | #endif |
201 | default: | |
202 | filtered = 0; | |
203 | break; | |
204 | } | |
205 | ||
206 | if (filtered < 0) | |
207 | break; | |
208 | if (filtered == 0) { | |
1da177e4 LT |
209 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); |
210 | ||
211 | /* Not releasing hash table! */ | |
9fb9cbb1 YK |
212 | if (clone) { |
213 | nf_reset(clone); | |
1da177e4 | 214 | rawv6_rcv(sk, clone); |
9fb9cbb1 | 215 | } |
1da177e4 | 216 | } |
be185884 | 217 | sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr, |
2dac4b96 | 218 | IP6CB(skb)->iif); |
1da177e4 LT |
219 | } |
220 | out: | |
b673e4df | 221 | read_unlock(&raw_v6_hashinfo.lock); |
d13964f4 | 222 | return delivered; |
1da177e4 LT |
223 | } |
224 | ||
69d6da0b PE |
225 | int raw6_local_deliver(struct sk_buff *skb, int nexthdr) |
226 | { | |
227 | struct sock *raw_sk; | |
228 | ||
b673e4df | 229 | raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]); |
69d6da0b PE |
230 | if (raw_sk && !ipv6_raw_deliver(skb, nexthdr)) |
231 | raw_sk = NULL; | |
232 | ||
233 | return raw_sk != NULL; | |
234 | } | |
235 | ||
1da177e4 LT |
236 | /* This cleans up af_inet6 a bit. -DaveM */ |
237 | static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
238 | { | |
239 | struct inet_sock *inet = inet_sk(sk); | |
240 | struct ipv6_pinfo *np = inet6_sk(sk); | |
241 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; | |
e69a4adc | 242 | __be32 v4addr = 0; |
1da177e4 LT |
243 | int addr_type; |
244 | int err; | |
245 | ||
246 | if (addr_len < SIN6_LEN_RFC2133) | |
247 | return -EINVAL; | |
248 | addr_type = ipv6_addr_type(&addr->sin6_addr); | |
249 | ||
250 | /* Raw sockets are IPv6 only */ | |
251 | if (addr_type == IPV6_ADDR_MAPPED) | |
252 | return(-EADDRNOTAVAIL); | |
253 | ||
254 | lock_sock(sk); | |
255 | ||
256 | err = -EINVAL; | |
257 | if (sk->sk_state != TCP_CLOSE) | |
258 | goto out; | |
259 | ||
260 | /* Check if the address belongs to the host. */ | |
261 | if (addr_type != IPV6_ADDR_ANY) { | |
262 | struct net_device *dev = NULL; | |
263 | ||
264 | if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
265 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
266 | addr->sin6_scope_id) { | |
267 | /* Override any existing binding, if another | |
268 | * one is supplied by user. | |
269 | */ | |
270 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
271 | } | |
1ab1457c | 272 | |
1da177e4 LT |
273 | /* Binding to link-local address requires an interface */ |
274 | if (!sk->sk_bound_dev_if) | |
275 | goto out; | |
276 | ||
3b1e0a65 | 277 | dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if); |
1da177e4 LT |
278 | if (!dev) { |
279 | err = -ENODEV; | |
280 | goto out; | |
281 | } | |
282 | } | |
1ab1457c | 283 | |
1da177e4 LT |
284 | /* ipv4 addr of the socket is invalid. Only the |
285 | * unspecified and mapped address have a v4 equivalent. | |
286 | */ | |
287 | v4addr = LOOPBACK4_IPV6; | |
288 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
289 | err = -EADDRNOTAVAIL; | |
3b1e0a65 | 290 | if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr, |
bfeade08 | 291 | dev, 0)) { |
1da177e4 LT |
292 | if (dev) |
293 | dev_put(dev); | |
294 | goto out; | |
295 | } | |
296 | } | |
297 | if (dev) | |
298 | dev_put(dev); | |
299 | } | |
300 | ||
301 | inet->rcv_saddr = inet->saddr = v4addr; | |
302 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); | |
303 | if (!(addr_type & IPV6_ADDR_MULTICAST)) | |
304 | ipv6_addr_copy(&np->saddr, &addr->sin6_addr); | |
305 | err = 0; | |
306 | out: | |
307 | release_sock(sk); | |
308 | return err; | |
309 | } | |
310 | ||
69d6da0b | 311 | static void rawv6_err(struct sock *sk, struct sk_buff *skb, |
1da177e4 | 312 | struct inet6_skb_parm *opt, |
04ce6909 | 313 | int type, int code, int offset, __be32 info) |
1da177e4 LT |
314 | { |
315 | struct inet_sock *inet = inet_sk(sk); | |
316 | struct ipv6_pinfo *np = inet6_sk(sk); | |
317 | int err; | |
318 | int harderr; | |
319 | ||
320 | /* Report error on raw socket, if: | |
321 | 1. User requested recverr. | |
322 | 2. Socket is connected (otherwise the error indication | |
323 | is useless without recverr and error is hard. | |
324 | */ | |
325 | if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) | |
326 | return; | |
327 | ||
328 | harderr = icmpv6_err_convert(type, code, &err); | |
329 | if (type == ICMPV6_PKT_TOOBIG) | |
330 | harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); | |
331 | ||
332 | if (np->recverr) { | |
333 | u8 *payload = skb->data; | |
334 | if (!inet->hdrincl) | |
335 | payload += offset; | |
336 | ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); | |
337 | } | |
338 | ||
339 | if (np->recverr || harderr) { | |
340 | sk->sk_err = err; | |
341 | sk->sk_error_report(sk); | |
342 | } | |
343 | } | |
344 | ||
69d6da0b PE |
345 | void raw6_icmp_error(struct sk_buff *skb, int nexthdr, |
346 | int type, int code, int inner_offset, __be32 info) | |
347 | { | |
348 | struct sock *sk; | |
349 | int hash; | |
350 | struct in6_addr *saddr, *daddr; | |
be185884 | 351 | struct net *net; |
69d6da0b | 352 | |
b673e4df | 353 | hash = nexthdr & (RAW_HTABLE_SIZE - 1); |
69d6da0b | 354 | |
b673e4df PE |
355 | read_lock(&raw_v6_hashinfo.lock); |
356 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
69d6da0b | 357 | if (sk != NULL) { |
05f175cd YH |
358 | /* Note: ipv6_hdr(skb) != skb->data */ |
359 | struct ipv6hdr *ip6h = (struct ipv6hdr *)skb->data; | |
360 | saddr = &ip6h->saddr; | |
361 | daddr = &ip6h->daddr; | |
c346dca1 | 362 | net = dev_net(skb->dev); |
69d6da0b | 363 | |
be185884 | 364 | while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr, |
69d6da0b PE |
365 | IP6CB(skb)->iif))) { |
366 | rawv6_err(sk, skb, NULL, type, code, | |
367 | inner_offset, info); | |
368 | sk = sk_next(sk); | |
369 | } | |
370 | } | |
b673e4df | 371 | read_unlock(&raw_v6_hashinfo.lock); |
69d6da0b PE |
372 | } |
373 | ||
1da177e4 LT |
374 | static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb) |
375 | { | |
1ab1457c | 376 | if ((raw6_sk(sk)->checksum || sk->sk_filter) && |
fb286bb2 | 377 | skb_checksum_complete(skb)) { |
a92aa318 | 378 | atomic_inc(&sk->sk_drops); |
fb286bb2 | 379 | kfree_skb(skb); |
3cc76caa | 380 | return NET_RX_DROP; |
1da177e4 LT |
381 | } |
382 | ||
383 | /* Charge it to the socket. */ | |
384 | if (sock_queue_rcv_skb(sk,skb)<0) { | |
a92aa318 | 385 | atomic_inc(&sk->sk_drops); |
1da177e4 | 386 | kfree_skb(skb); |
3cc76caa | 387 | return NET_RX_DROP; |
1da177e4 LT |
388 | } |
389 | ||
390 | return 0; | |
391 | } | |
392 | ||
393 | /* | |
1ab1457c | 394 | * This is next to useless... |
1da177e4 | 395 | * if we demultiplex in network layer we don't need the extra call |
1ab1457c YH |
396 | * just to queue the skb... |
397 | * maybe we could have the network decide upon a hint if it | |
1da177e4 LT |
398 | * should call raw_rcv for demultiplexing |
399 | */ | |
400 | int rawv6_rcv(struct sock *sk, struct sk_buff *skb) | |
401 | { | |
402 | struct inet_sock *inet = inet_sk(sk); | |
403 | struct raw6_sock *rp = raw6_sk(sk); | |
404 | ||
1ab1457c | 405 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { |
a92aa318 | 406 | atomic_inc(&sk->sk_drops); |
1ab1457c YH |
407 | kfree_skb(skb); |
408 | return NET_RX_DROP; | |
409 | } | |
1da177e4 LT |
410 | |
411 | if (!rp->checksum) | |
412 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
413 | ||
84fa7933 | 414 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
d56f90a7 | 415 | skb_postpull_rcsum(skb, skb_network_header(skb), |
cfe1fc77 | 416 | skb_network_header_len(skb)); |
0660e03f ACM |
417 | if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
418 | &ipv6_hdr(skb)->daddr, | |
fb286bb2 | 419 | skb->len, inet->num, skb->csum)) |
1da177e4 | 420 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1da177e4 | 421 | } |
60476372 | 422 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
423 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
424 | &ipv6_hdr(skb)->daddr, | |
425 | skb->len, | |
426 | inet->num, 0)); | |
1da177e4 LT |
427 | |
428 | if (inet->hdrincl) { | |
fb286bb2 | 429 | if (skb_checksum_complete(skb)) { |
a92aa318 | 430 | atomic_inc(&sk->sk_drops); |
1da177e4 | 431 | kfree_skb(skb); |
3cc76caa | 432 | return NET_RX_DROP; |
1da177e4 | 433 | } |
1da177e4 LT |
434 | } |
435 | ||
436 | rawv6_rcv_skb(sk, skb); | |
437 | return 0; | |
438 | } | |
439 | ||
440 | ||
441 | /* | |
442 | * This should be easy, if there is something there | |
443 | * we return it, otherwise we block. | |
444 | */ | |
445 | ||
446 | static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk, | |
447 | struct msghdr *msg, size_t len, | |
448 | int noblock, int flags, int *addr_len) | |
449 | { | |
450 | struct ipv6_pinfo *np = inet6_sk(sk); | |
451 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name; | |
452 | struct sk_buff *skb; | |
453 | size_t copied; | |
454 | int err; | |
455 | ||
456 | if (flags & MSG_OOB) | |
457 | return -EOPNOTSUPP; | |
1ab1457c YH |
458 | |
459 | if (addr_len) | |
1da177e4 LT |
460 | *addr_len=sizeof(*sin6); |
461 | ||
462 | if (flags & MSG_ERRQUEUE) | |
463 | return ipv6_recv_error(sk, msg, len); | |
464 | ||
465 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
466 | if (!skb) | |
467 | goto out; | |
468 | ||
469 | copied = skb->len; | |
1ab1457c YH |
470 | if (copied > len) { |
471 | copied = len; | |
472 | msg->msg_flags |= MSG_TRUNC; | |
473 | } | |
1da177e4 | 474 | |
60476372 | 475 | if (skb_csum_unnecessary(skb)) { |
1da177e4 LT |
476 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
477 | } else if (msg->msg_flags&MSG_TRUNC) { | |
fb286bb2 | 478 | if (__skb_checksum_complete(skb)) |
1da177e4 LT |
479 | goto csum_copy_err; |
480 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
481 | } else { | |
482 | err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov); | |
483 | if (err == -EINVAL) | |
484 | goto csum_copy_err; | |
485 | } | |
486 | if (err) | |
487 | goto out_free; | |
488 | ||
489 | /* Copy the address. */ | |
490 | if (sin6) { | |
491 | sin6->sin6_family = AF_INET6; | |
f59fc7f3 | 492 | sin6->sin6_port = 0; |
0660e03f | 493 | ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr); |
1da177e4 LT |
494 | sin6->sin6_flowinfo = 0; |
495 | sin6->sin6_scope_id = 0; | |
496 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
497 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
498 | } | |
499 | ||
500 | sock_recv_timestamp(msg, sk, skb); | |
501 | ||
502 | if (np->rxopt.all) | |
503 | datagram_recv_ctl(sk, msg, skb); | |
504 | ||
505 | err = copied; | |
506 | if (flags & MSG_TRUNC) | |
507 | err = skb->len; | |
508 | ||
509 | out_free: | |
510 | skb_free_datagram(sk, skb); | |
511 | out: | |
512 | return err; | |
513 | ||
514 | csum_copy_err: | |
3305b80c | 515 | skb_kill_datagram(sk, skb, flags); |
1da177e4 LT |
516 | |
517 | /* Error for blocking case is chosen to masquerade | |
518 | as some normal condition. | |
519 | */ | |
520 | err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; | |
a92aa318 | 521 | atomic_inc(&sk->sk_drops); |
3305b80c | 522 | goto out; |
1da177e4 LT |
523 | } |
524 | ||
525 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl, | |
357b40a1 | 526 | struct raw6_sock *rp) |
1da177e4 LT |
527 | { |
528 | struct sk_buff *skb; | |
529 | int err = 0; | |
357b40a1 HX |
530 | int offset; |
531 | int len; | |
679a8738 | 532 | int total_len; |
868c86bc AV |
533 | __wsum tmp_csum; |
534 | __sum16 csum; | |
1da177e4 LT |
535 | |
536 | if (!rp->checksum) | |
537 | goto send; | |
538 | ||
539 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
540 | goto out; | |
541 | ||
357b40a1 | 542 | offset = rp->offset; |
d56f90a7 ACM |
543 | total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) - |
544 | skb->data); | |
679a8738 | 545 | if (offset >= total_len - 1) { |
1da177e4 | 546 | err = -EINVAL; |
357b40a1 | 547 | ip6_flush_pending_frames(sk); |
1da177e4 LT |
548 | goto out; |
549 | } | |
550 | ||
551 | /* should be check HW csum miyazawa */ | |
552 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
553 | /* | |
554 | * Only one fragment on the socket. | |
555 | */ | |
556 | tmp_csum = skb->csum; | |
557 | } else { | |
357b40a1 | 558 | struct sk_buff *csum_skb = NULL; |
1da177e4 LT |
559 | tmp_csum = 0; |
560 | ||
561 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
562 | tmp_csum = csum_add(tmp_csum, skb->csum); | |
357b40a1 HX |
563 | |
564 | if (csum_skb) | |
565 | continue; | |
566 | ||
ea2ae17d | 567 | len = skb->len - skb_transport_offset(skb); |
357b40a1 HX |
568 | if (offset >= len) { |
569 | offset -= len; | |
570 | continue; | |
571 | } | |
572 | ||
573 | csum_skb = skb; | |
1da177e4 | 574 | } |
357b40a1 HX |
575 | |
576 | skb = csum_skb; | |
1da177e4 LT |
577 | } |
578 | ||
ea2ae17d | 579 | offset += skb_transport_offset(skb); |
357b40a1 HX |
580 | if (skb_copy_bits(skb, offset, &csum, 2)) |
581 | BUG(); | |
582 | ||
1da177e4 | 583 | /* in case cksum was not initialized */ |
357b40a1 | 584 | if (unlikely(csum)) |
5f92a738 | 585 | tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); |
357b40a1 | 586 | |
868c86bc | 587 | csum = csum_ipv6_magic(&fl->fl6_src, |
357b40a1 | 588 | &fl->fl6_dst, |
679a8738 | 589 | total_len, fl->proto, tmp_csum); |
357b40a1 | 590 | |
f6ab0288 AV |
591 | if (csum == 0 && fl->proto == IPPROTO_UDP) |
592 | csum = CSUM_MANGLED_0; | |
1da177e4 | 593 | |
357b40a1 HX |
594 | if (skb_store_bits(skb, offset, &csum, 2)) |
595 | BUG(); | |
1da177e4 | 596 | |
1da177e4 LT |
597 | send: |
598 | err = ip6_push_pending_frames(sk); | |
599 | out: | |
600 | return err; | |
601 | } | |
602 | ||
603 | static int rawv6_send_hdrinc(struct sock *sk, void *from, int length, | |
1ab1457c | 604 | struct flowi *fl, struct rt6_info *rt, |
1da177e4 LT |
605 | unsigned int flags) |
606 | { | |
3320da89 | 607 | struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 LT |
608 | struct ipv6hdr *iph; |
609 | struct sk_buff *skb; | |
1da177e4 LT |
610 | int err; |
611 | ||
612 | if (length > rt->u.dst.dev->mtu) { | |
613 | ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu); | |
614 | return -EMSGSIZE; | |
615 | } | |
616 | if (flags&MSG_PROBE) | |
617 | goto out; | |
618 | ||
f5184d26 JB |
619 | skb = sock_alloc_send_skb(sk, |
620 | length + LL_ALLOCATED_SPACE(rt->u.dst.dev) + 15, | |
621 | flags & MSG_DONTWAIT, &err); | |
1da177e4 | 622 | if (skb == NULL) |
1ab1457c | 623 | goto error; |
f5184d26 | 624 | skb_reserve(skb, LL_RESERVED_SPACE(rt->u.dst.dev)); |
1da177e4 LT |
625 | |
626 | skb->priority = sk->sk_priority; | |
4a19ec58 | 627 | skb->mark = sk->sk_mark; |
1da177e4 LT |
628 | skb->dst = dst_clone(&rt->u.dst); |
629 | ||
1ced98e8 ACM |
630 | skb_put(skb, length); |
631 | skb_reset_network_header(skb); | |
0660e03f | 632 | iph = ipv6_hdr(skb); |
1da177e4 LT |
633 | |
634 | skb->ip_summed = CHECKSUM_NONE; | |
635 | ||
b0e380b1 | 636 | skb->transport_header = skb->network_header; |
1da177e4 LT |
637 | err = memcpy_fromiovecend((void *)iph, from, 0, length); |
638 | if (err) | |
639 | goto error_fault; | |
640 | ||
3bd653c8 | 641 | IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS); |
6e23ae2a | 642 | err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev, |
1da177e4 LT |
643 | dst_output); |
644 | if (err > 0) | |
3320da89 | 645 | err = np->recverr ? net_xmit_errno(err) : 0; |
1da177e4 LT |
646 | if (err) |
647 | goto error; | |
648 | out: | |
649 | return 0; | |
650 | ||
651 | error_fault: | |
652 | err = -EFAULT; | |
653 | kfree_skb(skb); | |
654 | error: | |
3bd653c8 | 655 | IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); |
1ab1457c | 656 | return err; |
1da177e4 LT |
657 | } |
658 | ||
a27b58fe | 659 | static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) |
1da177e4 LT |
660 | { |
661 | struct iovec *iov; | |
662 | u8 __user *type = NULL; | |
663 | u8 __user *code = NULL; | |
6e8f4d48 | 664 | u8 len = 0; |
1da177e4 LT |
665 | int probed = 0; |
666 | int i; | |
667 | ||
668 | if (!msg->msg_iov) | |
a27b58fe | 669 | return 0; |
1da177e4 LT |
670 | |
671 | for (i = 0; i < msg->msg_iovlen; i++) { | |
672 | iov = &msg->msg_iov[i]; | |
673 | if (!iov) | |
674 | continue; | |
675 | ||
676 | switch (fl->proto) { | |
677 | case IPPROTO_ICMPV6: | |
678 | /* check if one-byte field is readable or not. */ | |
679 | if (iov->iov_base && iov->iov_len < 1) | |
680 | break; | |
681 | ||
682 | if (!type) { | |
683 | type = iov->iov_base; | |
684 | /* check if code field is readable or not. */ | |
685 | if (iov->iov_len > 1) | |
686 | code = type + 1; | |
687 | } else if (!code) | |
688 | code = iov->iov_base; | |
689 | ||
690 | if (type && code) { | |
a27b58fe HC |
691 | if (get_user(fl->fl_icmp_type, type) || |
692 | get_user(fl->fl_icmp_code, code)) | |
693 | return -EFAULT; | |
1da177e4 LT |
694 | probed = 1; |
695 | } | |
696 | break; | |
6e8f4d48 MN |
697 | case IPPROTO_MH: |
698 | if (iov->iov_base && iov->iov_len < 1) | |
699 | break; | |
700 | /* check if type field is readable or not. */ | |
701 | if (iov->iov_len > 2 - len) { | |
702 | u8 __user *p = iov->iov_base; | |
a27b58fe HC |
703 | if (get_user(fl->fl_mh_type, &p[2 - len])) |
704 | return -EFAULT; | |
6e8f4d48 MN |
705 | probed = 1; |
706 | } else | |
707 | len += iov->iov_len; | |
708 | ||
709 | break; | |
1da177e4 LT |
710 | default: |
711 | probed = 1; | |
712 | break; | |
713 | } | |
714 | if (probed) | |
715 | break; | |
716 | } | |
a27b58fe | 717 | return 0; |
1da177e4 LT |
718 | } |
719 | ||
720 | static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, | |
721 | struct msghdr *msg, size_t len) | |
722 | { | |
723 | struct ipv6_txoptions opt_space; | |
724 | struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
725 | struct in6_addr *daddr, *final_p = NULL, final; | |
726 | struct inet_sock *inet = inet_sk(sk); | |
727 | struct ipv6_pinfo *np = inet6_sk(sk); | |
728 | struct raw6_sock *rp = raw6_sk(sk); | |
729 | struct ipv6_txoptions *opt = NULL; | |
730 | struct ip6_flowlabel *flowlabel = NULL; | |
731 | struct dst_entry *dst = NULL; | |
732 | struct flowi fl; | |
733 | int addr_len = msg->msg_namelen; | |
734 | int hlimit = -1; | |
41a1f8ea | 735 | int tclass = -1; |
1da177e4 LT |
736 | u16 proto; |
737 | int err; | |
738 | ||
739 | /* Rough check on arithmetic overflow, | |
b59e139b | 740 | better check is made in ip6_append_data(). |
1da177e4 | 741 | */ |
b59e139b | 742 | if (len > INT_MAX) |
1da177e4 LT |
743 | return -EMSGSIZE; |
744 | ||
745 | /* Mirror BSD error message compatibility */ | |
1ab1457c | 746 | if (msg->msg_flags & MSG_OOB) |
1da177e4 LT |
747 | return -EOPNOTSUPP; |
748 | ||
749 | /* | |
1ab1457c | 750 | * Get and verify the address. |
1da177e4 LT |
751 | */ |
752 | memset(&fl, 0, sizeof(fl)); | |
753 | ||
4a19ec58 LAT |
754 | fl.mark = sk->sk_mark; |
755 | ||
1da177e4 | 756 | if (sin6) { |
1ab1457c | 757 | if (addr_len < SIN6_LEN_RFC2133) |
1da177e4 LT |
758 | return -EINVAL; |
759 | ||
1ab1457c | 760 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) |
1da177e4 LT |
761 | return(-EAFNOSUPPORT); |
762 | ||
763 | /* port is the proto value [0..255] carried in nexthdr */ | |
764 | proto = ntohs(sin6->sin6_port); | |
765 | ||
766 | if (!proto) | |
767 | proto = inet->num; | |
768 | else if (proto != inet->num) | |
769 | return(-EINVAL); | |
770 | ||
771 | if (proto > 255) | |
772 | return(-EINVAL); | |
773 | ||
774 | daddr = &sin6->sin6_addr; | |
775 | if (np->sndflow) { | |
776 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; | |
777 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
778 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
779 | if (flowlabel == NULL) | |
780 | return -EINVAL; | |
781 | daddr = &flowlabel->dst; | |
782 | } | |
783 | } | |
784 | ||
785 | /* | |
786 | * Otherwise it will be difficult to maintain | |
787 | * sk->sk_dst_cache. | |
788 | */ | |
789 | if (sk->sk_state == TCP_ESTABLISHED && | |
790 | ipv6_addr_equal(daddr, &np->daddr)) | |
791 | daddr = &np->daddr; | |
792 | ||
793 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
794 | sin6->sin6_scope_id && | |
795 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
796 | fl.oif = sin6->sin6_scope_id; | |
797 | } else { | |
1ab1457c | 798 | if (sk->sk_state != TCP_ESTABLISHED) |
1da177e4 | 799 | return -EDESTADDRREQ; |
1ab1457c | 800 | |
1da177e4 LT |
801 | proto = inet->num; |
802 | daddr = &np->daddr; | |
803 | fl.fl6_flowlabel = np->flow_label; | |
804 | } | |
805 | ||
1da177e4 LT |
806 | if (fl.oif == 0) |
807 | fl.oif = sk->sk_bound_dev_if; | |
808 | ||
809 | if (msg->msg_controllen) { | |
810 | opt = &opt_space; | |
811 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
812 | opt->tot_len = sizeof(struct ipv6_txoptions); | |
813 | ||
91e1908f | 814 | err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
815 | if (err < 0) { |
816 | fl6_sock_release(flowlabel); | |
817 | return err; | |
818 | } | |
819 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { | |
820 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
821 | if (flowlabel == NULL) | |
822 | return -EINVAL; | |
823 | } | |
824 | if (!(opt->opt_nflen|opt->opt_flen)) | |
825 | opt = NULL; | |
826 | } | |
827 | if (opt == NULL) | |
828 | opt = np->opt; | |
df9890c3 YH |
829 | if (flowlabel) |
830 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
831 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 LT |
832 | |
833 | fl.proto = proto; | |
a27b58fe HC |
834 | err = rawv6_probe_proto_opt(&fl, msg); |
835 | if (err) | |
836 | goto out; | |
1ab1457c | 837 | |
876c7f41 BH |
838 | if (!ipv6_addr_any(daddr)) |
839 | ipv6_addr_copy(&fl.fl6_dst, daddr); | |
840 | else | |
841 | fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ | |
1da177e4 LT |
842 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |
843 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
844 | ||
845 | /* merge ip6_build_xmit from ip6_output */ | |
846 | if (opt && opt->srcrt) { | |
847 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
848 | ipv6_addr_copy(&final, &fl.fl6_dst); | |
849 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
850 | final_p = &final; | |
851 | } | |
852 | ||
853 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) | |
854 | fl.oif = np->mcast_oif; | |
beb8d13b | 855 | security_sk_classify_flow(sk, &fl); |
1da177e4 LT |
856 | |
857 | err = ip6_dst_lookup(sk, &dst, &fl); | |
858 | if (err) | |
859 | goto out; | |
860 | if (final_p) | |
861 | ipv6_addr_copy(&fl.fl6_dst, final_p); | |
862 | ||
52479b62 AD |
863 | err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT); |
864 | if (err < 0) { | |
14e50e57 DM |
865 | if (err == -EREMOTE) |
866 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
867 | if (err < 0) | |
868 | goto out; | |
869 | } | |
1da177e4 LT |
870 | |
871 | if (hlimit < 0) { | |
872 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) | |
873 | hlimit = np->mcast_hops; | |
874 | else | |
875 | hlimit = np->hop_limit; | |
876 | if (hlimit < 0) | |
6b75d090 | 877 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
878 | } |
879 | ||
41a1f8ea | 880 | if (tclass < 0) { |
e012d51c | 881 | tclass = np->tclass; |
41a1f8ea YH |
882 | if (tclass < 0) |
883 | tclass = 0; | |
884 | } | |
885 | ||
1da177e4 LT |
886 | if (msg->msg_flags&MSG_CONFIRM) |
887 | goto do_confirm; | |
888 | ||
889 | back_from_confirm: | |
890 | if (inet->hdrincl) { | |
891 | err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags); | |
892 | } else { | |
893 | lock_sock(sk); | |
41a1f8ea YH |
894 | err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, |
895 | len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst, | |
896 | msg->msg_flags); | |
1da177e4 LT |
897 | |
898 | if (err) | |
899 | ip6_flush_pending_frames(sk); | |
900 | else if (!(msg->msg_flags & MSG_MORE)) | |
357b40a1 | 901 | err = rawv6_push_pending_frames(sk, &fl, rp); |
3ef9d943 | 902 | release_sock(sk); |
1da177e4 LT |
903 | } |
904 | done: | |
6d3e85ec | 905 | dst_release(dst); |
1ab1457c | 906 | out: |
1da177e4 LT |
907 | fl6_sock_release(flowlabel); |
908 | return err<0?err:len; | |
909 | do_confirm: | |
910 | dst_confirm(dst); | |
911 | if (!(msg->msg_flags & MSG_PROBE) || len) | |
912 | goto back_from_confirm; | |
913 | err = 0; | |
914 | goto done; | |
915 | } | |
916 | ||
1ab1457c | 917 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
918 | char __user *optval, int optlen) |
919 | { | |
920 | switch (optname) { | |
921 | case ICMPV6_FILTER: | |
922 | if (optlen > sizeof(struct icmp6_filter)) | |
923 | optlen = sizeof(struct icmp6_filter); | |
924 | if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) | |
925 | return -EFAULT; | |
926 | return 0; | |
927 | default: | |
928 | return -ENOPROTOOPT; | |
3ff50b79 | 929 | } |
1da177e4 LT |
930 | |
931 | return 0; | |
932 | } | |
933 | ||
1ab1457c | 934 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
935 | char __user *optval, int __user *optlen) |
936 | { | |
937 | int len; | |
938 | ||
939 | switch (optname) { | |
940 | case ICMPV6_FILTER: | |
941 | if (get_user(len, optlen)) | |
942 | return -EFAULT; | |
943 | if (len < 0) | |
944 | return -EINVAL; | |
945 | if (len > sizeof(struct icmp6_filter)) | |
946 | len = sizeof(struct icmp6_filter); | |
947 | if (put_user(len, optlen)) | |
948 | return -EFAULT; | |
949 | if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) | |
950 | return -EFAULT; | |
951 | return 0; | |
952 | default: | |
953 | return -ENOPROTOOPT; | |
3ff50b79 | 954 | } |
1da177e4 LT |
955 | |
956 | return 0; | |
957 | } | |
958 | ||
959 | ||
3fdadf7d | 960 | static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
961 | char __user *optval, int optlen) |
962 | { | |
963 | struct raw6_sock *rp = raw6_sk(sk); | |
964 | int val; | |
965 | ||
1ab1457c | 966 | if (get_user(val, (int __user *)optval)) |
1da177e4 LT |
967 | return -EFAULT; |
968 | ||
969 | switch (optname) { | |
970 | case IPV6_CHECKSUM: | |
1a98d05f YH |
971 | if (inet_sk(sk)->num == IPPROTO_ICMPV6 && |
972 | level == IPPROTO_IPV6) { | |
973 | /* | |
974 | * RFC3542 tells that IPV6_CHECKSUM socket | |
975 | * option in the IPPROTO_IPV6 level is not | |
976 | * allowed on ICMPv6 sockets. | |
977 | * If you want to set it, use IPPROTO_RAW | |
978 | * level IPV6_CHECKSUM socket option | |
979 | * (Linux extension). | |
980 | */ | |
981 | return -EINVAL; | |
982 | } | |
983 | ||
1da177e4 LT |
984 | /* You may get strange result with a positive odd offset; |
985 | RFC2292bis agrees with me. */ | |
986 | if (val > 0 && (val&1)) | |
987 | return(-EINVAL); | |
988 | if (val < 0) { | |
989 | rp->checksum = 0; | |
990 | } else { | |
991 | rp->checksum = 1; | |
992 | rp->offset = val; | |
993 | } | |
994 | ||
995 | return 0; | |
996 | break; | |
997 | ||
998 | default: | |
999 | return(-ENOPROTOOPT); | |
1000 | } | |
1001 | } | |
1002 | ||
3fdadf7d DM |
1003 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, |
1004 | char __user *optval, int optlen) | |
1da177e4 | 1005 | { |
1da177e4 LT |
1006 | switch(level) { |
1007 | case SOL_RAW: | |
1008 | break; | |
1009 | ||
1010 | case SOL_ICMPV6: | |
1011 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1012 | return -EOPNOTSUPP; | |
3fdadf7d | 1013 | return rawv6_seticmpfilter(sk, level, optname, optval, |
1da177e4 LT |
1014 | optlen); |
1015 | case SOL_IPV6: | |
1016 | if (optname == IPV6_CHECKSUM) | |
1017 | break; | |
1018 | default: | |
3fdadf7d | 1019 | return ipv6_setsockopt(sk, level, optname, optval, |
1da177e4 | 1020 | optlen); |
3ff50b79 SH |
1021 | } |
1022 | ||
3fdadf7d DM |
1023 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1024 | } | |
1025 | ||
1026 | #ifdef CONFIG_COMPAT | |
1027 | static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1028 | char __user *optval, int optlen) |
3fdadf7d | 1029 | { |
543d9cfe ACM |
1030 | switch (level) { |
1031 | case SOL_RAW: | |
1032 | break; | |
1033 | case SOL_ICMPV6: | |
1034 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1035 | return -EOPNOTSUPP; | |
1036 | return rawv6_seticmpfilter(sk, level, optname, optval, optlen); | |
1037 | case SOL_IPV6: | |
1038 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1039 | break; |
543d9cfe ACM |
1040 | default: |
1041 | return compat_ipv6_setsockopt(sk, level, optname, | |
1042 | optval, optlen); | |
3ff50b79 | 1043 | } |
3fdadf7d DM |
1044 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1045 | } | |
1046 | #endif | |
1047 | ||
1048 | static int do_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
1049 | char __user *optval, int __user *optlen) | |
1050 | { | |
1051 | struct raw6_sock *rp = raw6_sk(sk); | |
1052 | int val, len; | |
1da177e4 LT |
1053 | |
1054 | if (get_user(len,optlen)) | |
1055 | return -EFAULT; | |
1056 | ||
1057 | switch (optname) { | |
1058 | case IPV6_CHECKSUM: | |
1a98d05f YH |
1059 | /* |
1060 | * We allow getsockopt() for IPPROTO_IPV6-level | |
1061 | * IPV6_CHECKSUM socket option on ICMPv6 sockets | |
1062 | * since RFC3542 is silent about it. | |
1063 | */ | |
1da177e4 LT |
1064 | if (rp->checksum == 0) |
1065 | val = -1; | |
1066 | else | |
1067 | val = rp->offset; | |
1068 | break; | |
1069 | ||
1070 | default: | |
1071 | return -ENOPROTOOPT; | |
1072 | } | |
1073 | ||
1074 | len = min_t(unsigned int, sizeof(int), len); | |
1075 | ||
1076 | if (put_user(len, optlen)) | |
1077 | return -EFAULT; | |
1078 | if (copy_to_user(optval,&val,len)) | |
1079 | return -EFAULT; | |
1080 | return 0; | |
1081 | } | |
1082 | ||
3fdadf7d DM |
1083 | static int rawv6_getsockopt(struct sock *sk, int level, int optname, |
1084 | char __user *optval, int __user *optlen) | |
1085 | { | |
1086 | switch(level) { | |
1087 | case SOL_RAW: | |
1088 | break; | |
1089 | ||
1090 | case SOL_ICMPV6: | |
1091 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1092 | return -EOPNOTSUPP; | |
1093 | return rawv6_geticmpfilter(sk, level, optname, optval, | |
1094 | optlen); | |
1095 | case SOL_IPV6: | |
1096 | if (optname == IPV6_CHECKSUM) | |
1097 | break; | |
1098 | default: | |
1099 | return ipv6_getsockopt(sk, level, optname, optval, | |
1100 | optlen); | |
3ff50b79 SH |
1101 | } |
1102 | ||
3fdadf7d DM |
1103 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1104 | } | |
1105 | ||
1106 | #ifdef CONFIG_COMPAT | |
1107 | static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1108 | char __user *optval, int __user *optlen) |
3fdadf7d | 1109 | { |
543d9cfe ACM |
1110 | switch (level) { |
1111 | case SOL_RAW: | |
1112 | break; | |
1113 | case SOL_ICMPV6: | |
1114 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) | |
1115 | return -EOPNOTSUPP; | |
1116 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); | |
1117 | case SOL_IPV6: | |
1118 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1119 | break; |
543d9cfe ACM |
1120 | default: |
1121 | return compat_ipv6_getsockopt(sk, level, optname, | |
1122 | optval, optlen); | |
3ff50b79 | 1123 | } |
3fdadf7d DM |
1124 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1125 | } | |
1126 | #endif | |
1127 | ||
1da177e4 LT |
1128 | static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) |
1129 | { | |
1130 | switch(cmd) { | |
1131 | case SIOCOUTQ: | |
1132 | { | |
1133 | int amount = atomic_read(&sk->sk_wmem_alloc); | |
1134 | return put_user(amount, (int __user *)arg); | |
1135 | } | |
1136 | case SIOCINQ: | |
1137 | { | |
1138 | struct sk_buff *skb; | |
1139 | int amount = 0; | |
1140 | ||
e0f9f858 | 1141 | spin_lock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1142 | skb = skb_peek(&sk->sk_receive_queue); |
1143 | if (skb != NULL) | |
27a884dc | 1144 | amount = skb->tail - skb->transport_header; |
e0f9f858 | 1145 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1146 | return put_user(amount, (int __user *)arg); |
1147 | } | |
1148 | ||
1149 | default: | |
7bc570c8 YH |
1150 | #ifdef CONFIG_IPV6_MROUTE |
1151 | return ip6mr_ioctl(sk, cmd, (void __user *)arg); | |
1152 | #else | |
1da177e4 | 1153 | return -ENOIOCTLCMD; |
7bc570c8 | 1154 | #endif |
1da177e4 LT |
1155 | } |
1156 | } | |
1157 | ||
1158 | static void rawv6_close(struct sock *sk, long timeout) | |
1159 | { | |
1160 | if (inet_sk(sk)->num == IPPROTO_RAW) | |
725a8ff0 | 1161 | ip6_ra_control(sk, -1); |
7bc570c8 | 1162 | ip6mr_sk_done(sk); |
1da177e4 LT |
1163 | sk_common_release(sk); |
1164 | } | |
1165 | ||
7d06b2e0 | 1166 | static void raw6_destroy(struct sock *sk) |
22dd4850 DL |
1167 | { |
1168 | lock_sock(sk); | |
1169 | ip6_flush_pending_frames(sk); | |
1170 | release_sock(sk); | |
f23d60de | 1171 | |
7d06b2e0 | 1172 | inet6_destroy_sock(sk); |
22dd4850 DL |
1173 | } |
1174 | ||
1da177e4 LT |
1175 | static int rawv6_init_sk(struct sock *sk) |
1176 | { | |
f48d5ff1 MN |
1177 | struct raw6_sock *rp = raw6_sk(sk); |
1178 | ||
1179 | switch (inet_sk(sk)->num) { | |
1180 | case IPPROTO_ICMPV6: | |
1da177e4 LT |
1181 | rp->checksum = 1; |
1182 | rp->offset = 2; | |
f48d5ff1 MN |
1183 | break; |
1184 | case IPPROTO_MH: | |
1185 | rp->checksum = 1; | |
1186 | rp->offset = 4; | |
1187 | break; | |
1188 | default: | |
1189 | break; | |
1da177e4 LT |
1190 | } |
1191 | return(0); | |
1192 | } | |
1193 | ||
1194 | struct proto rawv6_prot = { | |
543d9cfe ACM |
1195 | .name = "RAWv6", |
1196 | .owner = THIS_MODULE, | |
1197 | .close = rawv6_close, | |
22dd4850 | 1198 | .destroy = raw6_destroy, |
543d9cfe ACM |
1199 | .connect = ip6_datagram_connect, |
1200 | .disconnect = udp_disconnect, | |
1201 | .ioctl = rawv6_ioctl, | |
1202 | .init = rawv6_init_sk, | |
543d9cfe ACM |
1203 | .setsockopt = rawv6_setsockopt, |
1204 | .getsockopt = rawv6_getsockopt, | |
1205 | .sendmsg = rawv6_sendmsg, | |
1206 | .recvmsg = rawv6_recvmsg, | |
1207 | .bind = rawv6_bind, | |
1208 | .backlog_rcv = rawv6_rcv_skb, | |
fc8717ba PE |
1209 | .hash = raw_hash_sk, |
1210 | .unhash = raw_unhash_sk, | |
543d9cfe | 1211 | .obj_size = sizeof(struct raw6_sock), |
fc8717ba | 1212 | .h.raw_hash = &raw_v6_hashinfo, |
3fdadf7d | 1213 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1214 | .compat_setsockopt = compat_rawv6_setsockopt, |
1215 | .compat_getsockopt = compat_rawv6_getsockopt, | |
3fdadf7d | 1216 | #endif |
1da177e4 LT |
1217 | }; |
1218 | ||
1219 | #ifdef CONFIG_PROC_FS | |
1da177e4 LT |
1220 | static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) |
1221 | { | |
1222 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1223 | struct in6_addr *dest, *src; | |
1224 | __u16 destp, srcp; | |
1225 | ||
1226 | dest = &np->daddr; | |
1227 | src = &np->rcv_saddr; | |
1228 | destp = 0; | |
1229 | srcp = inet_sk(sp)->num; | |
1230 | seq_printf(seq, | |
1231 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
a92aa318 | 1232 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1da177e4 LT |
1233 | i, |
1234 | src->s6_addr32[0], src->s6_addr32[1], | |
1235 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1236 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1237 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1238 | sp->sk_state, |
1da177e4 LT |
1239 | atomic_read(&sp->sk_wmem_alloc), |
1240 | atomic_read(&sp->sk_rmem_alloc), | |
1241 | 0, 0L, 0, | |
1242 | sock_i_uid(sp), 0, | |
1243 | sock_i_ino(sp), | |
a92aa318 | 1244 | atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); |
1da177e4 LT |
1245 | } |
1246 | ||
1247 | static int raw6_seq_show(struct seq_file *seq, void *v) | |
1248 | { | |
1249 | if (v == SEQ_START_TOKEN) | |
1250 | seq_printf(seq, | |
1251 | " sl " | |
1252 | "local_address " | |
1253 | "remote_address " | |
1254 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
cb61cb9b | 1255 | " uid timeout inode ref pointer drops\n"); |
1da177e4 | 1256 | else |
42a73808 | 1257 | raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); |
1da177e4 LT |
1258 | return 0; |
1259 | } | |
1260 | ||
56b3d975 | 1261 | static const struct seq_operations raw6_seq_ops = { |
42a73808 PE |
1262 | .start = raw_seq_start, |
1263 | .next = raw_seq_next, | |
1264 | .stop = raw_seq_stop, | |
1da177e4 LT |
1265 | .show = raw6_seq_show, |
1266 | }; | |
1267 | ||
1268 | static int raw6_seq_open(struct inode *inode, struct file *file) | |
1269 | { | |
3046d767 | 1270 | return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops); |
1da177e4 LT |
1271 | } |
1272 | ||
9a32144e | 1273 | static const struct file_operations raw6_seq_fops = { |
1da177e4 LT |
1274 | .owner = THIS_MODULE, |
1275 | .open = raw6_seq_open, | |
1276 | .read = seq_read, | |
1277 | .llseek = seq_lseek, | |
f51d599f | 1278 | .release = seq_release_net, |
1da177e4 LT |
1279 | }; |
1280 | ||
a308da16 | 1281 | static int raw6_init_net(struct net *net) |
1da177e4 | 1282 | { |
a308da16 | 1283 | if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops)) |
1da177e4 | 1284 | return -ENOMEM; |
a308da16 | 1285 | |
1da177e4 LT |
1286 | return 0; |
1287 | } | |
1288 | ||
a308da16 PE |
1289 | static void raw6_exit_net(struct net *net) |
1290 | { | |
1291 | proc_net_remove(net, "raw6"); | |
1292 | } | |
1293 | ||
1294 | static struct pernet_operations raw6_net_ops = { | |
1295 | .init = raw6_init_net, | |
1296 | .exit = raw6_exit_net, | |
1297 | }; | |
1298 | ||
1299 | int __init raw6_proc_init(void) | |
1300 | { | |
1301 | return register_pernet_subsys(&raw6_net_ops); | |
1302 | } | |
1303 | ||
1da177e4 LT |
1304 | void raw6_proc_exit(void) |
1305 | { | |
a308da16 | 1306 | unregister_pernet_subsys(&raw6_net_ops); |
1da177e4 LT |
1307 | } |
1308 | #endif /* CONFIG_PROC_FS */ | |
7f4e4868 DL |
1309 | |
1310 | /* Same as inet6_dgram_ops, sans udp_poll. */ | |
1311 | static const struct proto_ops inet6_sockraw_ops = { | |
1312 | .family = PF_INET6, | |
1313 | .owner = THIS_MODULE, | |
1314 | .release = inet6_release, | |
1315 | .bind = inet6_bind, | |
1316 | .connect = inet_dgram_connect, /* ok */ | |
1317 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
1318 | .accept = sock_no_accept, /* a do nothing */ | |
1319 | .getname = inet6_getname, | |
1320 | .poll = datagram_poll, /* ok */ | |
1321 | .ioctl = inet6_ioctl, /* must change */ | |
1322 | .listen = sock_no_listen, /* ok */ | |
1323 | .shutdown = inet_shutdown, /* ok */ | |
1324 | .setsockopt = sock_common_setsockopt, /* ok */ | |
1325 | .getsockopt = sock_common_getsockopt, /* ok */ | |
1326 | .sendmsg = inet_sendmsg, /* ok */ | |
1327 | .recvmsg = sock_common_recvmsg, /* ok */ | |
1328 | .mmap = sock_no_mmap, | |
1329 | .sendpage = sock_no_sendpage, | |
1330 | #ifdef CONFIG_COMPAT | |
1331 | .compat_setsockopt = compat_sock_common_setsockopt, | |
1332 | .compat_getsockopt = compat_sock_common_getsockopt, | |
1333 | #endif | |
1334 | }; | |
1335 | ||
1336 | static struct inet_protosw rawv6_protosw = { | |
1337 | .type = SOCK_RAW, | |
1338 | .protocol = IPPROTO_IP, /* wild card */ | |
1339 | .prot = &rawv6_prot, | |
1340 | .ops = &inet6_sockraw_ops, | |
1341 | .capability = CAP_NET_RAW, | |
1342 | .no_check = UDP_CSUM_DEFAULT, | |
1343 | .flags = INET_PROTOSW_REUSE, | |
1344 | }; | |
1345 | ||
1346 | int __init rawv6_init(void) | |
1347 | { | |
1348 | int ret; | |
1349 | ||
1350 | ret = inet6_register_protosw(&rawv6_protosw); | |
1351 | if (ret) | |
1352 | goto out; | |
1353 | out: | |
1354 | return ret; | |
1355 | } | |
1356 | ||
09f7709f | 1357 | void rawv6_exit(void) |
7f4e4868 DL |
1358 | { |
1359 | inet6_unregister_protosw(&rawv6_protosw); | |
1360 | } |