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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 | * | |
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> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
1da177e4 | 25 | #include <linux/sockios.h> |
1da177e4 LT |
26 | #include <linux/net.h> |
27 | #include <linux/in6.h> | |
28 | #include <linux/netdevice.h> | |
29 | #include <linux/if_arp.h> | |
30 | #include <linux/icmpv6.h> | |
31 | #include <linux/netfilter.h> | |
32 | #include <linux/netfilter_ipv6.h> | |
3305b80c | 33 | #include <linux/skbuff.h> |
e2d57766 | 34 | #include <linux/compat.h> |
1da177e4 LT |
35 | #include <asm/uaccess.h> |
36 | #include <asm/ioctls.h> | |
37 | ||
457c4cbc | 38 | #include <net/net_namespace.h> |
1da177e4 LT |
39 | #include <net/ip.h> |
40 | #include <net/sock.h> | |
41 | #include <net/snmp.h> | |
42 | ||
43 | #include <net/ipv6.h> | |
44 | #include <net/ndisc.h> | |
45 | #include <net/protocol.h> | |
46 | #include <net/ip6_route.h> | |
47 | #include <net/ip6_checksum.h> | |
48 | #include <net/addrconf.h> | |
49 | #include <net/transp_v6.h> | |
50 | #include <net/udp.h> | |
51 | #include <net/inet_common.h> | |
c752f073 | 52 | #include <net/tcp_states.h> |
59fbb3a6 | 53 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
7be96f76 MN |
54 | #include <net/mip6.h> |
55 | #endif | |
7bc570c8 | 56 | #include <linux/mroute6.h> |
1da177e4 | 57 | |
b673e4df | 58 | #include <net/raw.h> |
1da177e4 LT |
59 | #include <net/rawv6.h> |
60 | #include <net/xfrm.h> | |
61 | ||
62 | #include <linux/proc_fs.h> | |
63 | #include <linux/seq_file.h> | |
64 | ||
b673e4df | 65 | static struct raw_hashinfo raw_v6_hashinfo = { |
938b93ad | 66 | .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock), |
b673e4df | 67 | }; |
1da177e4 | 68 | |
be185884 PE |
69 | static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk, |
70 | unsigned short num, struct in6_addr *loc_addr, | |
71 | struct in6_addr *rmt_addr, int dif) | |
1da177e4 LT |
72 | { |
73 | struct hlist_node *node; | |
74 | int is_multicast = ipv6_addr_is_multicast(loc_addr); | |
75 | ||
76 | sk_for_each_from(sk, node) | |
c720c7e8 | 77 | if (inet_sk(sk)->inet_num == num) { |
1da177e4 LT |
78 | struct ipv6_pinfo *np = inet6_sk(sk); |
79 | ||
878628fb | 80 | if (!net_eq(sock_net(sk), net)) |
be185884 PE |
81 | continue; |
82 | ||
1da177e4 LT |
83 | if (!ipv6_addr_any(&np->daddr) && |
84 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
85 | continue; | |
86 | ||
0bd1b59b AM |
87 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) |
88 | continue; | |
89 | ||
1da177e4 LT |
90 | if (!ipv6_addr_any(&np->rcv_saddr)) { |
91 | if (ipv6_addr_equal(&np->rcv_saddr, loc_addr)) | |
92 | goto found; | |
93 | if (is_multicast && | |
94 | inet6_mc_check(sk, loc_addr, rmt_addr)) | |
95 | goto found; | |
96 | continue; | |
97 | } | |
98 | goto found; | |
99 | } | |
100 | sk = NULL; | |
101 | found: | |
102 | return sk; | |
103 | } | |
104 | ||
105 | /* | |
106 | * 0 - deliver | |
107 | * 1 - block | |
108 | */ | |
109 | static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb) | |
110 | { | |
111 | struct icmp6hdr *icmph; | |
112 | struct raw6_sock *rp = raw6_sk(sk); | |
113 | ||
114 | if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) { | |
115 | __u32 *data = &rp->filter.data[0]; | |
116 | int bit_nr; | |
117 | ||
118 | icmph = (struct icmp6hdr *) skb->data; | |
119 | bit_nr = icmph->icmp6_type; | |
120 | ||
121 | return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0; | |
122 | } | |
123 | return 0; | |
124 | } | |
125 | ||
59fbb3a6 | 126 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
f2eda47d | 127 | typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb); |
59fbb3a6 | 128 | |
f2eda47d ED |
129 | static mh_filter_t __rcu *mh_filter __read_mostly; |
130 | ||
131 | int rawv6_mh_filter_register(mh_filter_t filter) | |
59fbb3a6 MN |
132 | { |
133 | rcu_assign_pointer(mh_filter, filter); | |
134 | return 0; | |
135 | } | |
136 | EXPORT_SYMBOL(rawv6_mh_filter_register); | |
137 | ||
f2eda47d | 138 | int rawv6_mh_filter_unregister(mh_filter_t filter) |
59fbb3a6 MN |
139 | { |
140 | rcu_assign_pointer(mh_filter, NULL); | |
141 | synchronize_rcu(); | |
142 | return 0; | |
143 | } | |
144 | EXPORT_SYMBOL(rawv6_mh_filter_unregister); | |
145 | ||
146 | #endif | |
147 | ||
1da177e4 LT |
148 | /* |
149 | * demultiplex raw sockets. | |
150 | * (should consider queueing the skb in the sock receive_queue | |
151 | * without calling rawv6.c) | |
152 | * | |
153 | * Caller owns SKB so we must make clones. | |
154 | */ | |
69d6da0b | 155 | static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) |
1da177e4 LT |
156 | { |
157 | struct in6_addr *saddr; | |
158 | struct in6_addr *daddr; | |
159 | struct sock *sk; | |
d13964f4 | 160 | int delivered = 0; |
1da177e4 | 161 | __u8 hash; |
be185884 | 162 | struct net *net; |
1da177e4 | 163 | |
0660e03f | 164 | saddr = &ipv6_hdr(skb)->saddr; |
1da177e4 LT |
165 | daddr = saddr + 1; |
166 | ||
167 | hash = nexthdr & (MAX_INET_PROTOS - 1); | |
168 | ||
b673e4df PE |
169 | read_lock(&raw_v6_hashinfo.lock); |
170 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
1da177e4 | 171 | |
1da177e4 LT |
172 | if (sk == NULL) |
173 | goto out; | |
174 | ||
c346dca1 | 175 | net = dev_net(skb->dev); |
be185884 | 176 | sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif); |
1da177e4 LT |
177 | |
178 | while (sk) { | |
7be96f76 MN |
179 | int filtered; |
180 | ||
d13964f4 | 181 | delivered = 1; |
7be96f76 MN |
182 | switch (nexthdr) { |
183 | case IPPROTO_ICMPV6: | |
184 | filtered = icmpv6_filter(sk, skb); | |
185 | break; | |
59fbb3a6 MN |
186 | |
187 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) | |
7be96f76 | 188 | case IPPROTO_MH: |
59fbb3a6 | 189 | { |
7be96f76 MN |
190 | /* XXX: To validate MH only once for each packet, |
191 | * this is placed here. It should be after checking | |
192 | * xfrm policy, however it doesn't. The checking xfrm | |
193 | * policy is placed in rawv6_rcv() because it is | |
194 | * required for each socket. | |
195 | */ | |
f2eda47d | 196 | mh_filter_t *filter; |
59fbb3a6 MN |
197 | |
198 | filter = rcu_dereference(mh_filter); | |
f2eda47d | 199 | filtered = filter ? (*filter)(sk, skb) : 0; |
7be96f76 | 200 | break; |
59fbb3a6 | 201 | } |
7be96f76 MN |
202 | #endif |
203 | default: | |
204 | filtered = 0; | |
205 | break; | |
206 | } | |
207 | ||
208 | if (filtered < 0) | |
209 | break; | |
210 | if (filtered == 0) { | |
1da177e4 LT |
211 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); |
212 | ||
213 | /* Not releasing hash table! */ | |
9fb9cbb1 YK |
214 | if (clone) { |
215 | nf_reset(clone); | |
1da177e4 | 216 | rawv6_rcv(sk, clone); |
9fb9cbb1 | 217 | } |
1da177e4 | 218 | } |
be185884 | 219 | sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr, |
2dac4b96 | 220 | IP6CB(skb)->iif); |
1da177e4 LT |
221 | } |
222 | out: | |
b673e4df | 223 | read_unlock(&raw_v6_hashinfo.lock); |
d13964f4 | 224 | return delivered; |
1da177e4 LT |
225 | } |
226 | ||
69d6da0b PE |
227 | int raw6_local_deliver(struct sk_buff *skb, int nexthdr) |
228 | { | |
229 | struct sock *raw_sk; | |
230 | ||
b673e4df | 231 | raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]); |
69d6da0b PE |
232 | if (raw_sk && !ipv6_raw_deliver(skb, nexthdr)) |
233 | raw_sk = NULL; | |
234 | ||
235 | return raw_sk != NULL; | |
236 | } | |
237 | ||
1da177e4 LT |
238 | /* This cleans up af_inet6 a bit. -DaveM */ |
239 | static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
240 | { | |
241 | struct inet_sock *inet = inet_sk(sk); | |
242 | struct ipv6_pinfo *np = inet6_sk(sk); | |
243 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; | |
e69a4adc | 244 | __be32 v4addr = 0; |
1da177e4 LT |
245 | int addr_type; |
246 | int err; | |
247 | ||
248 | if (addr_len < SIN6_LEN_RFC2133) | |
249 | return -EINVAL; | |
250 | addr_type = ipv6_addr_type(&addr->sin6_addr); | |
251 | ||
252 | /* Raw sockets are IPv6 only */ | |
253 | if (addr_type == IPV6_ADDR_MAPPED) | |
fd5c0027 | 254 | return -EADDRNOTAVAIL; |
1da177e4 LT |
255 | |
256 | lock_sock(sk); | |
257 | ||
258 | err = -EINVAL; | |
259 | if (sk->sk_state != TCP_CLOSE) | |
260 | goto out; | |
261 | ||
fd5c0027 | 262 | rcu_read_lock(); |
1da177e4 LT |
263 | /* Check if the address belongs to the host. */ |
264 | if (addr_type != IPV6_ADDR_ANY) { | |
265 | struct net_device *dev = NULL; | |
266 | ||
267 | if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
268 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
269 | addr->sin6_scope_id) { | |
270 | /* Override any existing binding, if another | |
271 | * one is supplied by user. | |
272 | */ | |
273 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
274 | } | |
1ab1457c | 275 | |
1da177e4 LT |
276 | /* Binding to link-local address requires an interface */ |
277 | if (!sk->sk_bound_dev_if) | |
fd5c0027 | 278 | goto out_unlock; |
1da177e4 | 279 | |
fd5c0027 ED |
280 | err = -ENODEV; |
281 | dev = dev_get_by_index_rcu(sock_net(sk), | |
282 | sk->sk_bound_dev_if); | |
283 | if (!dev) | |
284 | goto out_unlock; | |
1da177e4 | 285 | } |
1ab1457c | 286 | |
1da177e4 LT |
287 | /* ipv4 addr of the socket is invalid. Only the |
288 | * unspecified and mapped address have a v4 equivalent. | |
289 | */ | |
290 | v4addr = LOOPBACK4_IPV6; | |
291 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
292 | err = -EADDRNOTAVAIL; | |
3b1e0a65 | 293 | if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr, |
bfeade08 | 294 | dev, 0)) { |
fd5c0027 | 295 | goto out_unlock; |
1da177e4 LT |
296 | } |
297 | } | |
1da177e4 LT |
298 | } |
299 | ||
c720c7e8 | 300 | inet->inet_rcv_saddr = inet->inet_saddr = v4addr; |
1da177e4 LT |
301 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); |
302 | if (!(addr_type & IPV6_ADDR_MULTICAST)) | |
303 | ipv6_addr_copy(&np->saddr, &addr->sin6_addr); | |
304 | err = 0; | |
fd5c0027 ED |
305 | out_unlock: |
306 | rcu_read_unlock(); | |
1da177e4 LT |
307 | out: |
308 | release_sock(sk); | |
309 | return err; | |
310 | } | |
311 | ||
69d6da0b | 312 | static void rawv6_err(struct sock *sk, struct sk_buff *skb, |
1da177e4 | 313 | struct inet6_skb_parm *opt, |
d5fdd6ba | 314 | u8 type, u8 code, int offset, __be32 info) |
1da177e4 LT |
315 | { |
316 | struct inet_sock *inet = inet_sk(sk); | |
317 | struct ipv6_pinfo *np = inet6_sk(sk); | |
318 | int err; | |
319 | int harderr; | |
320 | ||
321 | /* Report error on raw socket, if: | |
322 | 1. User requested recverr. | |
323 | 2. Socket is connected (otherwise the error indication | |
324 | is useless without recverr and error is hard. | |
325 | */ | |
326 | if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) | |
327 | return; | |
328 | ||
329 | harderr = icmpv6_err_convert(type, code, &err); | |
330 | if (type == ICMPV6_PKT_TOOBIG) | |
331 | harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); | |
332 | ||
333 | if (np->recverr) { | |
334 | u8 *payload = skb->data; | |
335 | if (!inet->hdrincl) | |
336 | payload += offset; | |
337 | ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); | |
338 | } | |
339 | ||
340 | if (np->recverr || harderr) { | |
341 | sk->sk_err = err; | |
342 | sk->sk_error_report(sk); | |
343 | } | |
344 | } | |
345 | ||
69d6da0b | 346 | void raw6_icmp_error(struct sk_buff *skb, int nexthdr, |
d5fdd6ba | 347 | u8 type, u8 code, int inner_offset, __be32 info) |
69d6da0b PE |
348 | { |
349 | struct sock *sk; | |
350 | int hash; | |
351 | struct in6_addr *saddr, *daddr; | |
be185884 | 352 | struct net *net; |
69d6da0b | 353 | |
b673e4df | 354 | hash = nexthdr & (RAW_HTABLE_SIZE - 1); |
69d6da0b | 355 | |
b673e4df PE |
356 | read_lock(&raw_v6_hashinfo.lock); |
357 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
69d6da0b | 358 | if (sk != NULL) { |
05f175cd YH |
359 | /* Note: ipv6_hdr(skb) != skb->data */ |
360 | struct ipv6hdr *ip6h = (struct ipv6hdr *)skb->data; | |
361 | saddr = &ip6h->saddr; | |
362 | daddr = &ip6h->daddr; | |
c346dca1 | 363 | net = dev_net(skb->dev); |
69d6da0b | 364 | |
be185884 | 365 | while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr, |
69d6da0b PE |
366 | IP6CB(skb)->iif))) { |
367 | rawv6_err(sk, skb, NULL, type, code, | |
368 | inner_offset, info); | |
369 | sk = sk_next(sk); | |
370 | } | |
371 | } | |
b673e4df | 372 | read_unlock(&raw_v6_hashinfo.lock); |
69d6da0b PE |
373 | } |
374 | ||
1da177e4 LT |
375 | static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb) |
376 | { | |
0d7da9dd | 377 | if ((raw6_sk(sk)->checksum || rcu_dereference_raw(sk->sk_filter)) && |
fb286bb2 | 378 | skb_checksum_complete(skb)) { |
a92aa318 | 379 | atomic_inc(&sk->sk_drops); |
fb286bb2 | 380 | kfree_skb(skb); |
3cc76caa | 381 | return NET_RX_DROP; |
1da177e4 LT |
382 | } |
383 | ||
384 | /* Charge it to the socket. */ | |
f84af32c | 385 | if (ip_queue_rcv_skb(sk, skb) < 0) { |
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, | |
c720c7e8 | 419 | skb->len, inet->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, | |
c720c7e8 | 426 | inet->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 | ||
4b340ae2 BH |
465 | if (np->rxpmtu && np->rxopt.bits.rxpmtu) |
466 | return ipv6_recv_rxpmtu(sk, msg, len); | |
467 | ||
1da177e4 LT |
468 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
469 | if (!skb) | |
470 | goto out; | |
471 | ||
472 | copied = skb->len; | |
1ab1457c YH |
473 | if (copied > len) { |
474 | copied = len; | |
475 | msg->msg_flags |= MSG_TRUNC; | |
476 | } | |
1da177e4 | 477 | |
60476372 | 478 | if (skb_csum_unnecessary(skb)) { |
1da177e4 LT |
479 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
480 | } else if (msg->msg_flags&MSG_TRUNC) { | |
fb286bb2 | 481 | if (__skb_checksum_complete(skb)) |
1da177e4 LT |
482 | goto csum_copy_err; |
483 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
484 | } else { | |
485 | err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov); | |
486 | if (err == -EINVAL) | |
487 | goto csum_copy_err; | |
488 | } | |
489 | if (err) | |
490 | goto out_free; | |
491 | ||
492 | /* Copy the address. */ | |
493 | if (sin6) { | |
494 | sin6->sin6_family = AF_INET6; | |
f59fc7f3 | 495 | sin6->sin6_port = 0; |
0660e03f | 496 | ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr); |
1da177e4 LT |
497 | sin6->sin6_flowinfo = 0; |
498 | sin6->sin6_scope_id = 0; | |
499 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
500 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
501 | } | |
502 | ||
3b885787 | 503 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
504 | |
505 | if (np->rxopt.all) | |
506 | datagram_recv_ctl(sk, msg, skb); | |
507 | ||
508 | err = copied; | |
509 | if (flags & MSG_TRUNC) | |
510 | err = skb->len; | |
511 | ||
512 | out_free: | |
513 | skb_free_datagram(sk, skb); | |
514 | out: | |
515 | return err; | |
516 | ||
517 | csum_copy_err: | |
3305b80c | 518 | skb_kill_datagram(sk, skb, flags); |
1da177e4 LT |
519 | |
520 | /* Error for blocking case is chosen to masquerade | |
521 | as some normal condition. | |
522 | */ | |
523 | err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; | |
3305b80c | 524 | goto out; |
1da177e4 LT |
525 | } |
526 | ||
527 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl, | |
357b40a1 | 528 | struct raw6_sock *rp) |
1da177e4 LT |
529 | { |
530 | struct sk_buff *skb; | |
531 | int err = 0; | |
357b40a1 HX |
532 | int offset; |
533 | int len; | |
679a8738 | 534 | int total_len; |
868c86bc AV |
535 | __wsum tmp_csum; |
536 | __sum16 csum; | |
1da177e4 LT |
537 | |
538 | if (!rp->checksum) | |
539 | goto send; | |
540 | ||
541 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
542 | goto out; | |
543 | ||
357b40a1 | 544 | offset = rp->offset; |
d56f90a7 ACM |
545 | total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) - |
546 | skb->data); | |
679a8738 | 547 | if (offset >= total_len - 1) { |
1da177e4 | 548 | err = -EINVAL; |
357b40a1 | 549 | ip6_flush_pending_frames(sk); |
1da177e4 LT |
550 | goto out; |
551 | } | |
552 | ||
553 | /* should be check HW csum miyazawa */ | |
554 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
555 | /* | |
556 | * Only one fragment on the socket. | |
557 | */ | |
558 | tmp_csum = skb->csum; | |
559 | } else { | |
357b40a1 | 560 | struct sk_buff *csum_skb = NULL; |
1da177e4 LT |
561 | tmp_csum = 0; |
562 | ||
563 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
564 | tmp_csum = csum_add(tmp_csum, skb->csum); | |
357b40a1 HX |
565 | |
566 | if (csum_skb) | |
567 | continue; | |
568 | ||
ea2ae17d | 569 | len = skb->len - skb_transport_offset(skb); |
357b40a1 HX |
570 | if (offset >= len) { |
571 | offset -= len; | |
572 | continue; | |
573 | } | |
574 | ||
575 | csum_skb = skb; | |
1da177e4 | 576 | } |
357b40a1 HX |
577 | |
578 | skb = csum_skb; | |
1da177e4 LT |
579 | } |
580 | ||
ea2ae17d | 581 | offset += skb_transport_offset(skb); |
357b40a1 HX |
582 | if (skb_copy_bits(skb, offset, &csum, 2)) |
583 | BUG(); | |
584 | ||
1da177e4 | 585 | /* in case cksum was not initialized */ |
357b40a1 | 586 | if (unlikely(csum)) |
5f92a738 | 587 | tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); |
357b40a1 | 588 | |
868c86bc | 589 | csum = csum_ipv6_magic(&fl->fl6_src, |
357b40a1 | 590 | &fl->fl6_dst, |
679a8738 | 591 | total_len, fl->proto, tmp_csum); |
357b40a1 | 592 | |
f6ab0288 AV |
593 | if (csum == 0 && fl->proto == IPPROTO_UDP) |
594 | csum = CSUM_MANGLED_0; | |
1da177e4 | 595 | |
357b40a1 HX |
596 | if (skb_store_bits(skb, offset, &csum, 2)) |
597 | BUG(); | |
1da177e4 | 598 | |
1da177e4 LT |
599 | send: |
600 | err = ip6_push_pending_frames(sk); | |
601 | out: | |
602 | return err; | |
603 | } | |
604 | ||
605 | static int rawv6_send_hdrinc(struct sock *sk, void *from, int length, | |
1789a640 | 606 | struct flowi *fl, struct dst_entry **dstp, |
1da177e4 LT |
607 | unsigned int flags) |
608 | { | |
3320da89 | 609 | struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 LT |
610 | struct ipv6hdr *iph; |
611 | struct sk_buff *skb; | |
1da177e4 | 612 | int err; |
1789a640 | 613 | struct rt6_info *rt = (struct rt6_info *)*dstp; |
1da177e4 | 614 | |
d8d1f30b CG |
615 | if (length > rt->dst.dev->mtu) { |
616 | ipv6_local_error(sk, EMSGSIZE, fl, rt->dst.dev->mtu); | |
1da177e4 LT |
617 | return -EMSGSIZE; |
618 | } | |
619 | if (flags&MSG_PROBE) | |
620 | goto out; | |
621 | ||
f5184d26 | 622 | skb = sock_alloc_send_skb(sk, |
d8d1f30b | 623 | length + LL_ALLOCATED_SPACE(rt->dst.dev) + 15, |
f5184d26 | 624 | flags & MSG_DONTWAIT, &err); |
1da177e4 | 625 | if (skb == NULL) |
1ab1457c | 626 | goto error; |
d8d1f30b | 627 | skb_reserve(skb, LL_RESERVED_SPACE(rt->dst.dev)); |
1da177e4 LT |
628 | |
629 | skb->priority = sk->sk_priority; | |
4a19ec58 | 630 | skb->mark = sk->sk_mark; |
d8d1f30b | 631 | skb_dst_set(skb, &rt->dst); |
1789a640 | 632 | *dstp = NULL; |
1da177e4 | 633 | |
1ced98e8 ACM |
634 | skb_put(skb, length); |
635 | skb_reset_network_header(skb); | |
0660e03f | 636 | iph = ipv6_hdr(skb); |
1da177e4 LT |
637 | |
638 | skb->ip_summed = CHECKSUM_NONE; | |
639 | ||
b0e380b1 | 640 | skb->transport_header = skb->network_header; |
1da177e4 LT |
641 | err = memcpy_fromiovecend((void *)iph, from, 0, length); |
642 | if (err) | |
643 | goto error_fault; | |
644 | ||
edf391ff | 645 | IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len); |
b2e0b385 | 646 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, |
d8d1f30b | 647 | rt->dst.dev, dst_output); |
1da177e4 | 648 | if (err > 0) |
6ce9e7b5 | 649 | err = net_xmit_errno(err); |
1da177e4 LT |
650 | if (err) |
651 | goto error; | |
652 | out: | |
653 | return 0; | |
654 | ||
655 | error_fault: | |
656 | err = -EFAULT; | |
657 | kfree_skb(skb); | |
658 | error: | |
3bd653c8 | 659 | IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); |
6ce9e7b5 ED |
660 | if (err == -ENOBUFS && !np->recverr) |
661 | err = 0; | |
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; | |
20c59de2 | 731 | struct in6_addr *daddr, *final_p, final; |
1da177e4 LT |
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; |
13b52cd4 | 742 | int dontfrag = -1; |
1da177e4 LT |
743 | u16 proto; |
744 | int err; | |
745 | ||
746 | /* Rough check on arithmetic overflow, | |
b59e139b | 747 | better check is made in ip6_append_data(). |
1da177e4 | 748 | */ |
b59e139b | 749 | if (len > INT_MAX) |
1da177e4 LT |
750 | return -EMSGSIZE; |
751 | ||
752 | /* Mirror BSD error message compatibility */ | |
1ab1457c | 753 | if (msg->msg_flags & MSG_OOB) |
1da177e4 LT |
754 | return -EOPNOTSUPP; |
755 | ||
756 | /* | |
1ab1457c | 757 | * Get and verify the address. |
1da177e4 LT |
758 | */ |
759 | memset(&fl, 0, sizeof(fl)); | |
760 | ||
4a19ec58 LAT |
761 | fl.mark = sk->sk_mark; |
762 | ||
1da177e4 | 763 | if (sin6) { |
1ab1457c | 764 | if (addr_len < SIN6_LEN_RFC2133) |
1da177e4 LT |
765 | return -EINVAL; |
766 | ||
1ab1457c | 767 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) |
a02cec21 | 768 | return -EAFNOSUPPORT; |
1da177e4 LT |
769 | |
770 | /* port is the proto value [0..255] carried in nexthdr */ | |
771 | proto = ntohs(sin6->sin6_port); | |
772 | ||
773 | if (!proto) | |
c720c7e8 ED |
774 | proto = inet->inet_num; |
775 | else if (proto != inet->inet_num) | |
a02cec21 | 776 | return -EINVAL; |
1da177e4 LT |
777 | |
778 | if (proto > 255) | |
a02cec21 | 779 | return -EINVAL; |
1da177e4 LT |
780 | |
781 | daddr = &sin6->sin6_addr; | |
782 | if (np->sndflow) { | |
783 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; | |
784 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
785 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
786 | if (flowlabel == NULL) | |
787 | return -EINVAL; | |
788 | daddr = &flowlabel->dst; | |
789 | } | |
790 | } | |
791 | ||
792 | /* | |
793 | * Otherwise it will be difficult to maintain | |
794 | * sk->sk_dst_cache. | |
795 | */ | |
796 | if (sk->sk_state == TCP_ESTABLISHED && | |
797 | ipv6_addr_equal(daddr, &np->daddr)) | |
798 | daddr = &np->daddr; | |
799 | ||
800 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
801 | sin6->sin6_scope_id && | |
802 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
803 | fl.oif = sin6->sin6_scope_id; | |
804 | } else { | |
1ab1457c | 805 | if (sk->sk_state != TCP_ESTABLISHED) |
1da177e4 | 806 | return -EDESTADDRREQ; |
1ab1457c | 807 | |
c720c7e8 | 808 | proto = inet->inet_num; |
1da177e4 LT |
809 | daddr = &np->daddr; |
810 | fl.fl6_flowlabel = np->flow_label; | |
811 | } | |
812 | ||
1da177e4 LT |
813 | if (fl.oif == 0) |
814 | fl.oif = sk->sk_bound_dev_if; | |
815 | ||
816 | if (msg->msg_controllen) { | |
817 | opt = &opt_space; | |
818 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
819 | opt->tot_len = sizeof(struct ipv6_txoptions); | |
820 | ||
13b52cd4 BH |
821 | err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, |
822 | &tclass, &dontfrag); | |
1da177e4 LT |
823 | if (err < 0) { |
824 | fl6_sock_release(flowlabel); | |
825 | return err; | |
826 | } | |
827 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { | |
828 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
829 | if (flowlabel == NULL) | |
830 | return -EINVAL; | |
831 | } | |
832 | if (!(opt->opt_nflen|opt->opt_flen)) | |
833 | opt = NULL; | |
834 | } | |
835 | if (opt == NULL) | |
836 | opt = np->opt; | |
df9890c3 YH |
837 | if (flowlabel) |
838 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
839 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 LT |
840 | |
841 | fl.proto = proto; | |
a27b58fe HC |
842 | err = rawv6_probe_proto_opt(&fl, msg); |
843 | if (err) | |
844 | goto out; | |
1ab1457c | 845 | |
876c7f41 BH |
846 | if (!ipv6_addr_any(daddr)) |
847 | ipv6_addr_copy(&fl.fl6_dst, daddr); | |
848 | else | |
849 | fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ | |
1da177e4 LT |
850 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |
851 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
852 | ||
20c59de2 | 853 | final_p = fl6_update_dst(&fl, opt, &final); |
1da177e4 LT |
854 | |
855 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) | |
856 | fl.oif = np->mcast_oif; | |
beb8d13b | 857 | security_sk_classify_flow(sk, &fl); |
1da177e4 LT |
858 | |
859 | err = ip6_dst_lookup(sk, &dst, &fl); | |
860 | if (err) | |
861 | goto out; | |
862 | if (final_p) | |
863 | ipv6_addr_copy(&fl.fl6_dst, final_p); | |
864 | ||
52479b62 AD |
865 | err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT); |
866 | if (err < 0) { | |
14e50e57 DM |
867 | if (err == -EREMOTE) |
868 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
869 | if (err < 0) | |
870 | goto out; | |
871 | } | |
1da177e4 LT |
872 | |
873 | if (hlimit < 0) { | |
874 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) | |
875 | hlimit = np->mcast_hops; | |
876 | else | |
877 | hlimit = np->hop_limit; | |
878 | if (hlimit < 0) | |
6b75d090 | 879 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
880 | } |
881 | ||
e651f03a | 882 | if (tclass < 0) |
e012d51c | 883 | tclass = np->tclass; |
41a1f8ea | 884 | |
13b52cd4 BH |
885 | if (dontfrag < 0) |
886 | dontfrag = np->dontfrag; | |
887 | ||
1da177e4 LT |
888 | if (msg->msg_flags&MSG_CONFIRM) |
889 | goto do_confirm; | |
890 | ||
891 | back_from_confirm: | |
1789a640 ED |
892 | if (inet->hdrincl) |
893 | err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, &dst, msg->msg_flags); | |
894 | else { | |
1da177e4 | 895 | lock_sock(sk); |
41a1f8ea YH |
896 | err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, |
897 | len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst, | |
13b52cd4 | 898 | msg->msg_flags, dontfrag); |
1da177e4 LT |
899 | |
900 | if (err) | |
901 | ip6_flush_pending_frames(sk); | |
902 | else if (!(msg->msg_flags & MSG_MORE)) | |
357b40a1 | 903 | err = rawv6_push_pending_frames(sk, &fl, rp); |
3ef9d943 | 904 | release_sock(sk); |
1da177e4 LT |
905 | } |
906 | done: | |
6d3e85ec | 907 | dst_release(dst); |
1ab1457c | 908 | out: |
1da177e4 LT |
909 | fl6_sock_release(flowlabel); |
910 | return err<0?err:len; | |
911 | do_confirm: | |
912 | dst_confirm(dst); | |
913 | if (!(msg->msg_flags & MSG_PROBE) || len) | |
914 | goto back_from_confirm; | |
915 | err = 0; | |
916 | goto done; | |
917 | } | |
918 | ||
1ab1457c | 919 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
920 | char __user *optval, int optlen) |
921 | { | |
922 | switch (optname) { | |
923 | case ICMPV6_FILTER: | |
924 | if (optlen > sizeof(struct icmp6_filter)) | |
925 | optlen = sizeof(struct icmp6_filter); | |
926 | if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) | |
927 | return -EFAULT; | |
928 | return 0; | |
929 | default: | |
930 | return -ENOPROTOOPT; | |
3ff50b79 | 931 | } |
1da177e4 LT |
932 | |
933 | return 0; | |
934 | } | |
935 | ||
1ab1457c | 936 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
937 | char __user *optval, int __user *optlen) |
938 | { | |
939 | int len; | |
940 | ||
941 | switch (optname) { | |
942 | case ICMPV6_FILTER: | |
943 | if (get_user(len, optlen)) | |
944 | return -EFAULT; | |
945 | if (len < 0) | |
946 | return -EINVAL; | |
947 | if (len > sizeof(struct icmp6_filter)) | |
948 | len = sizeof(struct icmp6_filter); | |
949 | if (put_user(len, optlen)) | |
950 | return -EFAULT; | |
951 | if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) | |
952 | return -EFAULT; | |
953 | return 0; | |
954 | default: | |
955 | return -ENOPROTOOPT; | |
3ff50b79 | 956 | } |
1da177e4 LT |
957 | |
958 | return 0; | |
959 | } | |
960 | ||
961 | ||
3fdadf7d | 962 | static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 963 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
964 | { |
965 | struct raw6_sock *rp = raw6_sk(sk); | |
966 | int val; | |
967 | ||
1ab1457c | 968 | if (get_user(val, (int __user *)optval)) |
1da177e4 LT |
969 | return -EFAULT; |
970 | ||
971 | switch (optname) { | |
972 | case IPV6_CHECKSUM: | |
c720c7e8 | 973 | if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 && |
1a98d05f YH |
974 | level == IPPROTO_IPV6) { |
975 | /* | |
976 | * RFC3542 tells that IPV6_CHECKSUM socket | |
977 | * option in the IPPROTO_IPV6 level is not | |
978 | * allowed on ICMPv6 sockets. | |
979 | * If you want to set it, use IPPROTO_RAW | |
980 | * level IPV6_CHECKSUM socket option | |
981 | * (Linux extension). | |
982 | */ | |
983 | return -EINVAL; | |
984 | } | |
985 | ||
1da177e4 LT |
986 | /* You may get strange result with a positive odd offset; |
987 | RFC2292bis agrees with me. */ | |
988 | if (val > 0 && (val&1)) | |
a02cec21 | 989 | return -EINVAL; |
1da177e4 LT |
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: | |
a02cec21 | 1001 | return -ENOPROTOOPT; |
1da177e4 LT |
1002 | } |
1003 | } | |
1004 | ||
3fdadf7d | 1005 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1006 | char __user *optval, unsigned int optlen) |
1da177e4 | 1007 | { |
1da177e4 LT |
1008 | switch(level) { |
1009 | case SOL_RAW: | |
1010 | break; | |
1011 | ||
1012 | case SOL_ICMPV6: | |
c720c7e8 | 1013 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
1da177e4 | 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, | |
b7058842 | 1030 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1031 | { |
543d9cfe ACM |
1032 | switch (level) { |
1033 | case SOL_RAW: | |
1034 | break; | |
1035 | case SOL_ICMPV6: | |
c720c7e8 | 1036 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
543d9cfe ACM |
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: | |
1a98d05f YH |
1061 | /* |
1062 | * We allow getsockopt() for IPPROTO_IPV6-level | |
1063 | * IPV6_CHECKSUM socket option on ICMPv6 sockets | |
1064 | * since RFC3542 is silent about it. | |
1065 | */ | |
1da177e4 LT |
1066 | if (rp->checksum == 0) |
1067 | val = -1; | |
1068 | else | |
1069 | val = rp->offset; | |
1070 | break; | |
1071 | ||
1072 | default: | |
1073 | return -ENOPROTOOPT; | |
1074 | } | |
1075 | ||
1076 | len = min_t(unsigned int, sizeof(int), len); | |
1077 | ||
1078 | if (put_user(len, optlen)) | |
1079 | return -EFAULT; | |
1080 | if (copy_to_user(optval,&val,len)) | |
1081 | return -EFAULT; | |
1082 | return 0; | |
1083 | } | |
1084 | ||
3fdadf7d DM |
1085 | static int rawv6_getsockopt(struct sock *sk, int level, int optname, |
1086 | char __user *optval, int __user *optlen) | |
1087 | { | |
1088 | switch(level) { | |
1089 | case SOL_RAW: | |
1090 | break; | |
1091 | ||
1092 | case SOL_ICMPV6: | |
c720c7e8 | 1093 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
3fdadf7d DM |
1094 | return -EOPNOTSUPP; |
1095 | return rawv6_geticmpfilter(sk, level, optname, optval, | |
1096 | optlen); | |
1097 | case SOL_IPV6: | |
1098 | if (optname == IPV6_CHECKSUM) | |
1099 | break; | |
1100 | default: | |
1101 | return ipv6_getsockopt(sk, level, optname, optval, | |
1102 | optlen); | |
3ff50b79 SH |
1103 | } |
1104 | ||
3fdadf7d DM |
1105 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1106 | } | |
1107 | ||
1108 | #ifdef CONFIG_COMPAT | |
1109 | static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1110 | char __user *optval, int __user *optlen) |
3fdadf7d | 1111 | { |
543d9cfe ACM |
1112 | switch (level) { |
1113 | case SOL_RAW: | |
1114 | break; | |
1115 | case SOL_ICMPV6: | |
c720c7e8 | 1116 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
543d9cfe ACM |
1117 | return -EOPNOTSUPP; |
1118 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); | |
1119 | case SOL_IPV6: | |
1120 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1121 | break; |
543d9cfe ACM |
1122 | default: |
1123 | return compat_ipv6_getsockopt(sk, level, optname, | |
1124 | optval, optlen); | |
3ff50b79 | 1125 | } |
3fdadf7d DM |
1126 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1127 | } | |
1128 | #endif | |
1129 | ||
1da177e4 LT |
1130 | static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) |
1131 | { | |
1132 | switch(cmd) { | |
1133 | case SIOCOUTQ: | |
1134 | { | |
31e6d363 ED |
1135 | int amount = sk_wmem_alloc_get(sk); |
1136 | ||
1da177e4 LT |
1137 | return put_user(amount, (int __user *)arg); |
1138 | } | |
1139 | case SIOCINQ: | |
1140 | { | |
1141 | struct sk_buff *skb; | |
1142 | int amount = 0; | |
1143 | ||
e0f9f858 | 1144 | spin_lock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1145 | skb = skb_peek(&sk->sk_receive_queue); |
1146 | if (skb != NULL) | |
27a884dc | 1147 | amount = skb->tail - skb->transport_header; |
e0f9f858 | 1148 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1149 | return put_user(amount, (int __user *)arg); |
1150 | } | |
1151 | ||
1152 | default: | |
7bc570c8 YH |
1153 | #ifdef CONFIG_IPV6_MROUTE |
1154 | return ip6mr_ioctl(sk, cmd, (void __user *)arg); | |
1155 | #else | |
1da177e4 | 1156 | return -ENOIOCTLCMD; |
7bc570c8 | 1157 | #endif |
1da177e4 LT |
1158 | } |
1159 | } | |
1160 | ||
e2d57766 DM |
1161 | #ifdef CONFIG_COMPAT |
1162 | static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg) | |
1163 | { | |
1164 | switch (cmd) { | |
1165 | case SIOCOUTQ: | |
1166 | case SIOCINQ: | |
1167 | return -ENOIOCTLCMD; | |
1168 | default: | |
1169 | #ifdef CONFIG_IPV6_MROUTE | |
1170 | return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg)); | |
1171 | #else | |
1172 | return -ENOIOCTLCMD; | |
1173 | #endif | |
1174 | } | |
1175 | } | |
1176 | #endif | |
1177 | ||
1da177e4 LT |
1178 | static void rawv6_close(struct sock *sk, long timeout) |
1179 | { | |
c720c7e8 | 1180 | if (inet_sk(sk)->inet_num == IPPROTO_RAW) |
725a8ff0 | 1181 | ip6_ra_control(sk, -1); |
7bc570c8 | 1182 | ip6mr_sk_done(sk); |
1da177e4 LT |
1183 | sk_common_release(sk); |
1184 | } | |
1185 | ||
7d06b2e0 | 1186 | static void raw6_destroy(struct sock *sk) |
22dd4850 DL |
1187 | { |
1188 | lock_sock(sk); | |
1189 | ip6_flush_pending_frames(sk); | |
1190 | release_sock(sk); | |
f23d60de | 1191 | |
7d06b2e0 | 1192 | inet6_destroy_sock(sk); |
22dd4850 DL |
1193 | } |
1194 | ||
1da177e4 LT |
1195 | static int rawv6_init_sk(struct sock *sk) |
1196 | { | |
f48d5ff1 MN |
1197 | struct raw6_sock *rp = raw6_sk(sk); |
1198 | ||
c720c7e8 | 1199 | switch (inet_sk(sk)->inet_num) { |
f48d5ff1 | 1200 | case IPPROTO_ICMPV6: |
1da177e4 LT |
1201 | rp->checksum = 1; |
1202 | rp->offset = 2; | |
f48d5ff1 MN |
1203 | break; |
1204 | case IPPROTO_MH: | |
1205 | rp->checksum = 1; | |
1206 | rp->offset = 4; | |
1207 | break; | |
1208 | default: | |
1209 | break; | |
1da177e4 | 1210 | } |
a02cec21 | 1211 | return 0; |
1da177e4 LT |
1212 | } |
1213 | ||
1214 | struct proto rawv6_prot = { | |
543d9cfe ACM |
1215 | .name = "RAWv6", |
1216 | .owner = THIS_MODULE, | |
1217 | .close = rawv6_close, | |
22dd4850 | 1218 | .destroy = raw6_destroy, |
543d9cfe ACM |
1219 | .connect = ip6_datagram_connect, |
1220 | .disconnect = udp_disconnect, | |
1221 | .ioctl = rawv6_ioctl, | |
1222 | .init = rawv6_init_sk, | |
543d9cfe ACM |
1223 | .setsockopt = rawv6_setsockopt, |
1224 | .getsockopt = rawv6_getsockopt, | |
1225 | .sendmsg = rawv6_sendmsg, | |
1226 | .recvmsg = rawv6_recvmsg, | |
1227 | .bind = rawv6_bind, | |
1228 | .backlog_rcv = rawv6_rcv_skb, | |
fc8717ba PE |
1229 | .hash = raw_hash_sk, |
1230 | .unhash = raw_unhash_sk, | |
543d9cfe | 1231 | .obj_size = sizeof(struct raw6_sock), |
fc8717ba | 1232 | .h.raw_hash = &raw_v6_hashinfo, |
3fdadf7d | 1233 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1234 | .compat_setsockopt = compat_rawv6_setsockopt, |
1235 | .compat_getsockopt = compat_rawv6_getsockopt, | |
e2d57766 | 1236 | .compat_ioctl = compat_rawv6_ioctl, |
3fdadf7d | 1237 | #endif |
1da177e4 LT |
1238 | }; |
1239 | ||
1240 | #ifdef CONFIG_PROC_FS | |
1da177e4 LT |
1241 | static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) |
1242 | { | |
1243 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1244 | struct in6_addr *dest, *src; | |
1245 | __u16 destp, srcp; | |
1246 | ||
1247 | dest = &np->daddr; | |
1248 | src = &np->rcv_saddr; | |
1249 | destp = 0; | |
c720c7e8 | 1250 | srcp = inet_sk(sp)->inet_num; |
1da177e4 LT |
1251 | seq_printf(seq, |
1252 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
a92aa318 | 1253 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1da177e4 LT |
1254 | i, |
1255 | src->s6_addr32[0], src->s6_addr32[1], | |
1256 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1257 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1258 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1259 | sp->sk_state, |
31e6d363 ED |
1260 | sk_wmem_alloc_get(sp), |
1261 | sk_rmem_alloc_get(sp), | |
1da177e4 LT |
1262 | 0, 0L, 0, |
1263 | sock_i_uid(sp), 0, | |
1264 | sock_i_ino(sp), | |
a92aa318 | 1265 | atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); |
1da177e4 LT |
1266 | } |
1267 | ||
1268 | static int raw6_seq_show(struct seq_file *seq, void *v) | |
1269 | { | |
1270 | if (v == SEQ_START_TOKEN) | |
1271 | seq_printf(seq, | |
1272 | " sl " | |
1273 | "local_address " | |
1274 | "remote_address " | |
1275 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
cb61cb9b | 1276 | " uid timeout inode ref pointer drops\n"); |
1da177e4 | 1277 | else |
42a73808 | 1278 | raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); |
1da177e4 LT |
1279 | return 0; |
1280 | } | |
1281 | ||
56b3d975 | 1282 | static const struct seq_operations raw6_seq_ops = { |
42a73808 PE |
1283 | .start = raw_seq_start, |
1284 | .next = raw_seq_next, | |
1285 | .stop = raw_seq_stop, | |
1da177e4 LT |
1286 | .show = raw6_seq_show, |
1287 | }; | |
1288 | ||
1289 | static int raw6_seq_open(struct inode *inode, struct file *file) | |
1290 | { | |
3046d767 | 1291 | return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops); |
1da177e4 LT |
1292 | } |
1293 | ||
9a32144e | 1294 | static const struct file_operations raw6_seq_fops = { |
1da177e4 LT |
1295 | .owner = THIS_MODULE, |
1296 | .open = raw6_seq_open, | |
1297 | .read = seq_read, | |
1298 | .llseek = seq_lseek, | |
f51d599f | 1299 | .release = seq_release_net, |
1da177e4 LT |
1300 | }; |
1301 | ||
2c8c1e72 | 1302 | static int __net_init raw6_init_net(struct net *net) |
1da177e4 | 1303 | { |
a308da16 | 1304 | if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops)) |
1da177e4 | 1305 | return -ENOMEM; |
a308da16 | 1306 | |
1da177e4 LT |
1307 | return 0; |
1308 | } | |
1309 | ||
2c8c1e72 | 1310 | static void __net_exit raw6_exit_net(struct net *net) |
a308da16 PE |
1311 | { |
1312 | proc_net_remove(net, "raw6"); | |
1313 | } | |
1314 | ||
1315 | static struct pernet_operations raw6_net_ops = { | |
1316 | .init = raw6_init_net, | |
1317 | .exit = raw6_exit_net, | |
1318 | }; | |
1319 | ||
1320 | int __init raw6_proc_init(void) | |
1321 | { | |
1322 | return register_pernet_subsys(&raw6_net_ops); | |
1323 | } | |
1324 | ||
1da177e4 LT |
1325 | void raw6_proc_exit(void) |
1326 | { | |
a308da16 | 1327 | unregister_pernet_subsys(&raw6_net_ops); |
1da177e4 LT |
1328 | } |
1329 | #endif /* CONFIG_PROC_FS */ | |
7f4e4868 DL |
1330 | |
1331 | /* Same as inet6_dgram_ops, sans udp_poll. */ | |
1332 | static const struct proto_ops inet6_sockraw_ops = { | |
1333 | .family = PF_INET6, | |
1334 | .owner = THIS_MODULE, | |
1335 | .release = inet6_release, | |
1336 | .bind = inet6_bind, | |
1337 | .connect = inet_dgram_connect, /* ok */ | |
1338 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
1339 | .accept = sock_no_accept, /* a do nothing */ | |
1340 | .getname = inet6_getname, | |
1341 | .poll = datagram_poll, /* ok */ | |
1342 | .ioctl = inet6_ioctl, /* must change */ | |
1343 | .listen = sock_no_listen, /* ok */ | |
1344 | .shutdown = inet_shutdown, /* ok */ | |
1345 | .setsockopt = sock_common_setsockopt, /* ok */ | |
1346 | .getsockopt = sock_common_getsockopt, /* ok */ | |
1347 | .sendmsg = inet_sendmsg, /* ok */ | |
1348 | .recvmsg = sock_common_recvmsg, /* ok */ | |
1349 | .mmap = sock_no_mmap, | |
1350 | .sendpage = sock_no_sendpage, | |
1351 | #ifdef CONFIG_COMPAT | |
1352 | .compat_setsockopt = compat_sock_common_setsockopt, | |
1353 | .compat_getsockopt = compat_sock_common_getsockopt, | |
1354 | #endif | |
1355 | }; | |
1356 | ||
1357 | static struct inet_protosw rawv6_protosw = { | |
1358 | .type = SOCK_RAW, | |
1359 | .protocol = IPPROTO_IP, /* wild card */ | |
1360 | .prot = &rawv6_prot, | |
1361 | .ops = &inet6_sockraw_ops, | |
7f4e4868 DL |
1362 | .no_check = UDP_CSUM_DEFAULT, |
1363 | .flags = INET_PROTOSW_REUSE, | |
1364 | }; | |
1365 | ||
1366 | int __init rawv6_init(void) | |
1367 | { | |
1368 | int ret; | |
1369 | ||
1370 | ret = inet6_register_protosw(&rawv6_protosw); | |
1371 | if (ret) | |
1372 | goto out; | |
1373 | out: | |
1374 | return ret; | |
1375 | } | |
1376 | ||
09f7709f | 1377 | void rawv6_exit(void) |
7f4e4868 DL |
1378 | { |
1379 | inet6_unregister_protosw(&rawv6_protosw); | |
1380 | } |