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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> |
1da177e4 LT |
34 | #include <asm/uaccess.h> |
35 | #include <asm/ioctls.h> | |
36 | ||
457c4cbc | 37 | #include <net/net_namespace.h> |
1da177e4 LT |
38 | #include <net/ip.h> |
39 | #include <net/sock.h> | |
40 | #include <net/snmp.h> | |
41 | ||
42 | #include <net/ipv6.h> | |
43 | #include <net/ndisc.h> | |
44 | #include <net/protocol.h> | |
45 | #include <net/ip6_route.h> | |
46 | #include <net/ip6_checksum.h> | |
47 | #include <net/addrconf.h> | |
48 | #include <net/transp_v6.h> | |
49 | #include <net/udp.h> | |
50 | #include <net/inet_common.h> | |
c752f073 | 51 | #include <net/tcp_states.h> |
59fbb3a6 | 52 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
7be96f76 MN |
53 | #include <net/mip6.h> |
54 | #endif | |
7bc570c8 | 55 | #include <linux/mroute6.h> |
1da177e4 | 56 | |
b673e4df | 57 | #include <net/raw.h> |
1da177e4 LT |
58 | #include <net/rawv6.h> |
59 | #include <net/xfrm.h> | |
60 | ||
61 | #include <linux/proc_fs.h> | |
62 | #include <linux/seq_file.h> | |
63 | ||
b673e4df | 64 | static struct raw_hashinfo raw_v6_hashinfo = { |
938b93ad | 65 | .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock), |
b673e4df | 66 | }; |
1da177e4 | 67 | |
be185884 PE |
68 | static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk, |
69 | unsigned short num, struct in6_addr *loc_addr, | |
70 | struct in6_addr *rmt_addr, int dif) | |
1da177e4 LT |
71 | { |
72 | struct hlist_node *node; | |
73 | int is_multicast = ipv6_addr_is_multicast(loc_addr); | |
74 | ||
75 | sk_for_each_from(sk, node) | |
c720c7e8 | 76 | if (inet_sk(sk)->inet_num == num) { |
1da177e4 LT |
77 | struct ipv6_pinfo *np = inet6_sk(sk); |
78 | ||
878628fb | 79 | if (!net_eq(sock_net(sk), net)) |
be185884 PE |
80 | continue; |
81 | ||
1da177e4 LT |
82 | if (!ipv6_addr_any(&np->daddr) && |
83 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
84 | continue; | |
85 | ||
0bd1b59b AM |
86 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) |
87 | continue; | |
88 | ||
1da177e4 LT |
89 | if (!ipv6_addr_any(&np->rcv_saddr)) { |
90 | if (ipv6_addr_equal(&np->rcv_saddr, loc_addr)) | |
91 | goto found; | |
92 | if (is_multicast && | |
93 | inet6_mc_check(sk, loc_addr, rmt_addr)) | |
94 | goto found; | |
95 | continue; | |
96 | } | |
97 | goto found; | |
98 | } | |
99 | sk = NULL; | |
100 | found: | |
101 | return sk; | |
102 | } | |
103 | ||
104 | /* | |
105 | * 0 - deliver | |
106 | * 1 - block | |
107 | */ | |
108 | static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb) | |
109 | { | |
110 | struct icmp6hdr *icmph; | |
111 | struct raw6_sock *rp = raw6_sk(sk); | |
112 | ||
113 | if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) { | |
114 | __u32 *data = &rp->filter.data[0]; | |
115 | int bit_nr; | |
116 | ||
117 | icmph = (struct icmp6hdr *) skb->data; | |
118 | bit_nr = icmph->icmp6_type; | |
119 | ||
120 | return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0; | |
121 | } | |
122 | return 0; | |
123 | } | |
124 | ||
59fbb3a6 MN |
125 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
126 | static int (*mh_filter)(struct sock *sock, struct sk_buff *skb); | |
127 | ||
128 | int rawv6_mh_filter_register(int (*filter)(struct sock *sock, | |
129 | struct sk_buff *skb)) | |
130 | { | |
131 | rcu_assign_pointer(mh_filter, filter); | |
132 | return 0; | |
133 | } | |
134 | EXPORT_SYMBOL(rawv6_mh_filter_register); | |
135 | ||
136 | int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock, | |
137 | struct sk_buff *skb)) | |
138 | { | |
139 | rcu_assign_pointer(mh_filter, NULL); | |
140 | synchronize_rcu(); | |
141 | return 0; | |
142 | } | |
143 | EXPORT_SYMBOL(rawv6_mh_filter_unregister); | |
144 | ||
145 | #endif | |
146 | ||
1da177e4 LT |
147 | /* |
148 | * demultiplex raw sockets. | |
149 | * (should consider queueing the skb in the sock receive_queue | |
150 | * without calling rawv6.c) | |
151 | * | |
152 | * Caller owns SKB so we must make clones. | |
153 | */ | |
69d6da0b | 154 | static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) |
1da177e4 LT |
155 | { |
156 | struct in6_addr *saddr; | |
157 | struct in6_addr *daddr; | |
158 | struct sock *sk; | |
d13964f4 | 159 | int delivered = 0; |
1da177e4 | 160 | __u8 hash; |
be185884 | 161 | struct net *net; |
1da177e4 | 162 | |
0660e03f | 163 | saddr = &ipv6_hdr(skb)->saddr; |
1da177e4 LT |
164 | daddr = saddr + 1; |
165 | ||
166 | hash = nexthdr & (MAX_INET_PROTOS - 1); | |
167 | ||
b673e4df PE |
168 | read_lock(&raw_v6_hashinfo.lock); |
169 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
1da177e4 | 170 | |
1da177e4 LT |
171 | if (sk == NULL) |
172 | goto out; | |
173 | ||
c346dca1 | 174 | net = dev_net(skb->dev); |
be185884 | 175 | sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif); |
1da177e4 LT |
176 | |
177 | while (sk) { | |
7be96f76 MN |
178 | int filtered; |
179 | ||
d13964f4 | 180 | delivered = 1; |
7be96f76 MN |
181 | switch (nexthdr) { |
182 | case IPPROTO_ICMPV6: | |
183 | filtered = icmpv6_filter(sk, skb); | |
184 | break; | |
59fbb3a6 MN |
185 | |
186 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) | |
7be96f76 | 187 | case IPPROTO_MH: |
59fbb3a6 | 188 | { |
7be96f76 MN |
189 | /* XXX: To validate MH only once for each packet, |
190 | * this is placed here. It should be after checking | |
191 | * xfrm policy, however it doesn't. The checking xfrm | |
192 | * policy is placed in rawv6_rcv() because it is | |
193 | * required for each socket. | |
194 | */ | |
59fbb3a6 MN |
195 | int (*filter)(struct sock *sock, struct sk_buff *skb); |
196 | ||
197 | filter = rcu_dereference(mh_filter); | |
198 | filtered = filter ? filter(sk, skb) : 0; | |
7be96f76 | 199 | break; |
59fbb3a6 | 200 | } |
7be96f76 MN |
201 | #endif |
202 | default: | |
203 | filtered = 0; | |
204 | break; | |
205 | } | |
206 | ||
207 | if (filtered < 0) | |
208 | break; | |
209 | if (filtered == 0) { | |
1da177e4 LT |
210 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); |
211 | ||
212 | /* Not releasing hash table! */ | |
9fb9cbb1 YK |
213 | if (clone) { |
214 | nf_reset(clone); | |
1da177e4 | 215 | rawv6_rcv(sk, clone); |
9fb9cbb1 | 216 | } |
1da177e4 | 217 | } |
be185884 | 218 | sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr, |
2dac4b96 | 219 | IP6CB(skb)->iif); |
1da177e4 LT |
220 | } |
221 | out: | |
b673e4df | 222 | read_unlock(&raw_v6_hashinfo.lock); |
d13964f4 | 223 | return delivered; |
1da177e4 LT |
224 | } |
225 | ||
69d6da0b PE |
226 | int raw6_local_deliver(struct sk_buff *skb, int nexthdr) |
227 | { | |
228 | struct sock *raw_sk; | |
229 | ||
b673e4df | 230 | raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]); |
69d6da0b PE |
231 | if (raw_sk && !ipv6_raw_deliver(skb, nexthdr)) |
232 | raw_sk = NULL; | |
233 | ||
234 | return raw_sk != NULL; | |
235 | } | |
236 | ||
1da177e4 LT |
237 | /* This cleans up af_inet6 a bit. -DaveM */ |
238 | static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
239 | { | |
240 | struct inet_sock *inet = inet_sk(sk); | |
241 | struct ipv6_pinfo *np = inet6_sk(sk); | |
242 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; | |
e69a4adc | 243 | __be32 v4addr = 0; |
1da177e4 LT |
244 | int addr_type; |
245 | int err; | |
246 | ||
247 | if (addr_len < SIN6_LEN_RFC2133) | |
248 | return -EINVAL; | |
249 | addr_type = ipv6_addr_type(&addr->sin6_addr); | |
250 | ||
251 | /* Raw sockets are IPv6 only */ | |
252 | if (addr_type == IPV6_ADDR_MAPPED) | |
fd5c0027 | 253 | return -EADDRNOTAVAIL; |
1da177e4 LT |
254 | |
255 | lock_sock(sk); | |
256 | ||
257 | err = -EINVAL; | |
258 | if (sk->sk_state != TCP_CLOSE) | |
259 | goto out; | |
260 | ||
fd5c0027 | 261 | rcu_read_lock(); |
1da177e4 LT |
262 | /* Check if the address belongs to the host. */ |
263 | if (addr_type != IPV6_ADDR_ANY) { | |
264 | struct net_device *dev = NULL; | |
265 | ||
266 | if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
267 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
268 | addr->sin6_scope_id) { | |
269 | /* Override any existing binding, if another | |
270 | * one is supplied by user. | |
271 | */ | |
272 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
273 | } | |
1ab1457c | 274 | |
1da177e4 LT |
275 | /* Binding to link-local address requires an interface */ |
276 | if (!sk->sk_bound_dev_if) | |
fd5c0027 | 277 | goto out_unlock; |
1da177e4 | 278 | |
fd5c0027 ED |
279 | err = -ENODEV; |
280 | dev = dev_get_by_index_rcu(sock_net(sk), | |
281 | sk->sk_bound_dev_if); | |
282 | if (!dev) | |
283 | goto out_unlock; | |
1da177e4 | 284 | } |
1ab1457c | 285 | |
1da177e4 LT |
286 | /* ipv4 addr of the socket is invalid. Only the |
287 | * unspecified and mapped address have a v4 equivalent. | |
288 | */ | |
289 | v4addr = LOOPBACK4_IPV6; | |
290 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
291 | err = -EADDRNOTAVAIL; | |
3b1e0a65 | 292 | if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr, |
bfeade08 | 293 | dev, 0)) { |
fd5c0027 | 294 | goto out_unlock; |
1da177e4 LT |
295 | } |
296 | } | |
1da177e4 LT |
297 | } |
298 | ||
c720c7e8 | 299 | inet->inet_rcv_saddr = inet->inet_saddr = v4addr; |
1da177e4 LT |
300 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); |
301 | if (!(addr_type & IPV6_ADDR_MULTICAST)) | |
302 | ipv6_addr_copy(&np->saddr, &addr->sin6_addr); | |
303 | err = 0; | |
fd5c0027 ED |
304 | out_unlock: |
305 | rcu_read_unlock(); | |
1da177e4 LT |
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, |
d5fdd6ba | 313 | u8 type, u8 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 | 345 | void raw6_icmp_error(struct sk_buff *skb, int nexthdr, |
d5fdd6ba | 346 | u8 type, u8 code, int inner_offset, __be32 info) |
69d6da0b PE |
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 | { | |
0d7da9dd | 376 | if ((raw6_sk(sk)->checksum || rcu_dereference_raw(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. */ | |
f84af32c | 384 | if (ip_queue_rcv_skb(sk, skb) < 0) { |
1da177e4 | 385 | kfree_skb(skb); |
3cc76caa | 386 | return NET_RX_DROP; |
1da177e4 LT |
387 | } |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
392 | /* | |
1ab1457c | 393 | * This is next to useless... |
1da177e4 | 394 | * if we demultiplex in network layer we don't need the extra call |
1ab1457c YH |
395 | * just to queue the skb... |
396 | * maybe we could have the network decide upon a hint if it | |
1da177e4 LT |
397 | * should call raw_rcv for demultiplexing |
398 | */ | |
399 | int rawv6_rcv(struct sock *sk, struct sk_buff *skb) | |
400 | { | |
401 | struct inet_sock *inet = inet_sk(sk); | |
402 | struct raw6_sock *rp = raw6_sk(sk); | |
403 | ||
1ab1457c | 404 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { |
a92aa318 | 405 | atomic_inc(&sk->sk_drops); |
1ab1457c YH |
406 | kfree_skb(skb); |
407 | return NET_RX_DROP; | |
408 | } | |
1da177e4 LT |
409 | |
410 | if (!rp->checksum) | |
411 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
412 | ||
84fa7933 | 413 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
d56f90a7 | 414 | skb_postpull_rcsum(skb, skb_network_header(skb), |
cfe1fc77 | 415 | skb_network_header_len(skb)); |
0660e03f ACM |
416 | if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
417 | &ipv6_hdr(skb)->daddr, | |
c720c7e8 | 418 | skb->len, inet->inet_num, skb->csum)) |
1da177e4 | 419 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1da177e4 | 420 | } |
60476372 | 421 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
422 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
423 | &ipv6_hdr(skb)->daddr, | |
424 | skb->len, | |
c720c7e8 | 425 | inet->inet_num, 0)); |
1da177e4 LT |
426 | |
427 | if (inet->hdrincl) { | |
fb286bb2 | 428 | if (skb_checksum_complete(skb)) { |
a92aa318 | 429 | atomic_inc(&sk->sk_drops); |
1da177e4 | 430 | kfree_skb(skb); |
3cc76caa | 431 | return NET_RX_DROP; |
1da177e4 | 432 | } |
1da177e4 LT |
433 | } |
434 | ||
435 | rawv6_rcv_skb(sk, skb); | |
436 | return 0; | |
437 | } | |
438 | ||
439 | ||
440 | /* | |
441 | * This should be easy, if there is something there | |
442 | * we return it, otherwise we block. | |
443 | */ | |
444 | ||
445 | static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk, | |
446 | struct msghdr *msg, size_t len, | |
447 | int noblock, int flags, int *addr_len) | |
448 | { | |
449 | struct ipv6_pinfo *np = inet6_sk(sk); | |
450 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name; | |
451 | struct sk_buff *skb; | |
452 | size_t copied; | |
453 | int err; | |
454 | ||
455 | if (flags & MSG_OOB) | |
456 | return -EOPNOTSUPP; | |
1ab1457c YH |
457 | |
458 | if (addr_len) | |
1da177e4 LT |
459 | *addr_len=sizeof(*sin6); |
460 | ||
461 | if (flags & MSG_ERRQUEUE) | |
462 | return ipv6_recv_error(sk, msg, len); | |
463 | ||
4b340ae2 BH |
464 | if (np->rxpmtu && np->rxopt.bits.rxpmtu) |
465 | return ipv6_recv_rxpmtu(sk, msg, len); | |
466 | ||
1da177e4 LT |
467 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
468 | if (!skb) | |
469 | goto out; | |
470 | ||
471 | copied = skb->len; | |
1ab1457c YH |
472 | if (copied > len) { |
473 | copied = len; | |
474 | msg->msg_flags |= MSG_TRUNC; | |
475 | } | |
1da177e4 | 476 | |
60476372 | 477 | if (skb_csum_unnecessary(skb)) { |
1da177e4 LT |
478 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
479 | } else if (msg->msg_flags&MSG_TRUNC) { | |
fb286bb2 | 480 | if (__skb_checksum_complete(skb)) |
1da177e4 LT |
481 | goto csum_copy_err; |
482 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
483 | } else { | |
484 | err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov); | |
485 | if (err == -EINVAL) | |
486 | goto csum_copy_err; | |
487 | } | |
488 | if (err) | |
489 | goto out_free; | |
490 | ||
491 | /* Copy the address. */ | |
492 | if (sin6) { | |
493 | sin6->sin6_family = AF_INET6; | |
f59fc7f3 | 494 | sin6->sin6_port = 0; |
0660e03f | 495 | ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr); |
1da177e4 LT |
496 | sin6->sin6_flowinfo = 0; |
497 | sin6->sin6_scope_id = 0; | |
498 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
499 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
500 | } | |
501 | ||
3b885787 | 502 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
503 | |
504 | if (np->rxopt.all) | |
505 | datagram_recv_ctl(sk, msg, skb); | |
506 | ||
507 | err = copied; | |
508 | if (flags & MSG_TRUNC) | |
509 | err = skb->len; | |
510 | ||
511 | out_free: | |
512 | skb_free_datagram(sk, skb); | |
513 | out: | |
514 | return err; | |
515 | ||
516 | csum_copy_err: | |
3305b80c | 517 | skb_kill_datagram(sk, skb, flags); |
1da177e4 LT |
518 | |
519 | /* Error for blocking case is chosen to masquerade | |
520 | as some normal condition. | |
521 | */ | |
522 | err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; | |
3305b80c | 523 | goto out; |
1da177e4 LT |
524 | } |
525 | ||
526 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl, | |
357b40a1 | 527 | struct raw6_sock *rp) |
1da177e4 LT |
528 | { |
529 | struct sk_buff *skb; | |
530 | int err = 0; | |
357b40a1 HX |
531 | int offset; |
532 | int len; | |
679a8738 | 533 | int total_len; |
868c86bc AV |
534 | __wsum tmp_csum; |
535 | __sum16 csum; | |
1da177e4 LT |
536 | |
537 | if (!rp->checksum) | |
538 | goto send; | |
539 | ||
540 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
541 | goto out; | |
542 | ||
357b40a1 | 543 | offset = rp->offset; |
d56f90a7 ACM |
544 | total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) - |
545 | skb->data); | |
679a8738 | 546 | if (offset >= total_len - 1) { |
1da177e4 | 547 | err = -EINVAL; |
357b40a1 | 548 | ip6_flush_pending_frames(sk); |
1da177e4 LT |
549 | goto out; |
550 | } | |
551 | ||
552 | /* should be check HW csum miyazawa */ | |
553 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
554 | /* | |
555 | * Only one fragment on the socket. | |
556 | */ | |
557 | tmp_csum = skb->csum; | |
558 | } else { | |
357b40a1 | 559 | struct sk_buff *csum_skb = NULL; |
1da177e4 LT |
560 | tmp_csum = 0; |
561 | ||
562 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
563 | tmp_csum = csum_add(tmp_csum, skb->csum); | |
357b40a1 HX |
564 | |
565 | if (csum_skb) | |
566 | continue; | |
567 | ||
ea2ae17d | 568 | len = skb->len - skb_transport_offset(skb); |
357b40a1 HX |
569 | if (offset >= len) { |
570 | offset -= len; | |
571 | continue; | |
572 | } | |
573 | ||
574 | csum_skb = skb; | |
1da177e4 | 575 | } |
357b40a1 HX |
576 | |
577 | skb = csum_skb; | |
1da177e4 LT |
578 | } |
579 | ||
ea2ae17d | 580 | offset += skb_transport_offset(skb); |
357b40a1 HX |
581 | if (skb_copy_bits(skb, offset, &csum, 2)) |
582 | BUG(); | |
583 | ||
1da177e4 | 584 | /* in case cksum was not initialized */ |
357b40a1 | 585 | if (unlikely(csum)) |
5f92a738 | 586 | tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); |
357b40a1 | 587 | |
868c86bc | 588 | csum = csum_ipv6_magic(&fl->fl6_src, |
357b40a1 | 589 | &fl->fl6_dst, |
679a8738 | 590 | total_len, fl->proto, tmp_csum); |
357b40a1 | 591 | |
f6ab0288 AV |
592 | if (csum == 0 && fl->proto == IPPROTO_UDP) |
593 | csum = CSUM_MANGLED_0; | |
1da177e4 | 594 | |
357b40a1 HX |
595 | if (skb_store_bits(skb, offset, &csum, 2)) |
596 | BUG(); | |
1da177e4 | 597 | |
1da177e4 LT |
598 | send: |
599 | err = ip6_push_pending_frames(sk); | |
600 | out: | |
601 | return err; | |
602 | } | |
603 | ||
604 | static int rawv6_send_hdrinc(struct sock *sk, void *from, int length, | |
1789a640 | 605 | struct flowi *fl, struct dst_entry **dstp, |
1da177e4 LT |
606 | unsigned int flags) |
607 | { | |
3320da89 | 608 | struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 LT |
609 | struct ipv6hdr *iph; |
610 | struct sk_buff *skb; | |
1da177e4 | 611 | int err; |
1789a640 | 612 | struct rt6_info *rt = (struct rt6_info *)*dstp; |
1da177e4 | 613 | |
d8d1f30b CG |
614 | if (length > rt->dst.dev->mtu) { |
615 | ipv6_local_error(sk, EMSGSIZE, fl, rt->dst.dev->mtu); | |
1da177e4 LT |
616 | return -EMSGSIZE; |
617 | } | |
618 | if (flags&MSG_PROBE) | |
619 | goto out; | |
620 | ||
f5184d26 | 621 | skb = sock_alloc_send_skb(sk, |
d8d1f30b | 622 | length + LL_ALLOCATED_SPACE(rt->dst.dev) + 15, |
f5184d26 | 623 | flags & MSG_DONTWAIT, &err); |
1da177e4 | 624 | if (skb == NULL) |
1ab1457c | 625 | goto error; |
d8d1f30b | 626 | skb_reserve(skb, LL_RESERVED_SPACE(rt->dst.dev)); |
1da177e4 LT |
627 | |
628 | skb->priority = sk->sk_priority; | |
4a19ec58 | 629 | skb->mark = sk->sk_mark; |
d8d1f30b | 630 | skb_dst_set(skb, &rt->dst); |
1789a640 | 631 | *dstp = NULL; |
1da177e4 | 632 | |
1ced98e8 ACM |
633 | skb_put(skb, length); |
634 | skb_reset_network_header(skb); | |
0660e03f | 635 | iph = ipv6_hdr(skb); |
1da177e4 LT |
636 | |
637 | skb->ip_summed = CHECKSUM_NONE; | |
638 | ||
b0e380b1 | 639 | skb->transport_header = skb->network_header; |
1da177e4 LT |
640 | err = memcpy_fromiovecend((void *)iph, from, 0, length); |
641 | if (err) | |
642 | goto error_fault; | |
643 | ||
edf391ff | 644 | IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len); |
b2e0b385 | 645 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, |
d8d1f30b | 646 | rt->dst.dev, dst_output); |
1da177e4 | 647 | if (err > 0) |
6ce9e7b5 | 648 | err = net_xmit_errno(err); |
1da177e4 LT |
649 | if (err) |
650 | goto error; | |
651 | out: | |
652 | return 0; | |
653 | ||
654 | error_fault: | |
655 | err = -EFAULT; | |
656 | kfree_skb(skb); | |
657 | error: | |
3bd653c8 | 658 | IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); |
6ce9e7b5 ED |
659 | if (err == -ENOBUFS && !np->recverr) |
660 | err = 0; | |
1ab1457c | 661 | return err; |
1da177e4 LT |
662 | } |
663 | ||
a27b58fe | 664 | static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) |
1da177e4 LT |
665 | { |
666 | struct iovec *iov; | |
667 | u8 __user *type = NULL; | |
668 | u8 __user *code = NULL; | |
6e8f4d48 | 669 | u8 len = 0; |
1da177e4 LT |
670 | int probed = 0; |
671 | int i; | |
672 | ||
673 | if (!msg->msg_iov) | |
a27b58fe | 674 | return 0; |
1da177e4 LT |
675 | |
676 | for (i = 0; i < msg->msg_iovlen; i++) { | |
677 | iov = &msg->msg_iov[i]; | |
678 | if (!iov) | |
679 | continue; | |
680 | ||
681 | switch (fl->proto) { | |
682 | case IPPROTO_ICMPV6: | |
683 | /* check if one-byte field is readable or not. */ | |
684 | if (iov->iov_base && iov->iov_len < 1) | |
685 | break; | |
686 | ||
687 | if (!type) { | |
688 | type = iov->iov_base; | |
689 | /* check if code field is readable or not. */ | |
690 | if (iov->iov_len > 1) | |
691 | code = type + 1; | |
692 | } else if (!code) | |
693 | code = iov->iov_base; | |
694 | ||
695 | if (type && code) { | |
a27b58fe HC |
696 | if (get_user(fl->fl_icmp_type, type) || |
697 | get_user(fl->fl_icmp_code, code)) | |
698 | return -EFAULT; | |
1da177e4 LT |
699 | probed = 1; |
700 | } | |
701 | break; | |
6e8f4d48 MN |
702 | case IPPROTO_MH: |
703 | if (iov->iov_base && iov->iov_len < 1) | |
704 | break; | |
705 | /* check if type field is readable or not. */ | |
706 | if (iov->iov_len > 2 - len) { | |
707 | u8 __user *p = iov->iov_base; | |
a27b58fe HC |
708 | if (get_user(fl->fl_mh_type, &p[2 - len])) |
709 | return -EFAULT; | |
6e8f4d48 MN |
710 | probed = 1; |
711 | } else | |
712 | len += iov->iov_len; | |
713 | ||
714 | break; | |
1da177e4 LT |
715 | default: |
716 | probed = 1; | |
717 | break; | |
718 | } | |
719 | if (probed) | |
720 | break; | |
721 | } | |
a27b58fe | 722 | return 0; |
1da177e4 LT |
723 | } |
724 | ||
725 | static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, | |
726 | struct msghdr *msg, size_t len) | |
727 | { | |
728 | struct ipv6_txoptions opt_space; | |
729 | struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
20c59de2 | 730 | struct in6_addr *daddr, *final_p, final; |
1da177e4 LT |
731 | struct inet_sock *inet = inet_sk(sk); |
732 | struct ipv6_pinfo *np = inet6_sk(sk); | |
733 | struct raw6_sock *rp = raw6_sk(sk); | |
734 | struct ipv6_txoptions *opt = NULL; | |
735 | struct ip6_flowlabel *flowlabel = NULL; | |
736 | struct dst_entry *dst = NULL; | |
737 | struct flowi fl; | |
738 | int addr_len = msg->msg_namelen; | |
739 | int hlimit = -1; | |
41a1f8ea | 740 | int tclass = -1; |
13b52cd4 | 741 | int dontfrag = -1; |
1da177e4 LT |
742 | u16 proto; |
743 | int err; | |
744 | ||
745 | /* Rough check on arithmetic overflow, | |
b59e139b | 746 | better check is made in ip6_append_data(). |
1da177e4 | 747 | */ |
b59e139b | 748 | if (len > INT_MAX) |
1da177e4 LT |
749 | return -EMSGSIZE; |
750 | ||
751 | /* Mirror BSD error message compatibility */ | |
1ab1457c | 752 | if (msg->msg_flags & MSG_OOB) |
1da177e4 LT |
753 | return -EOPNOTSUPP; |
754 | ||
755 | /* | |
1ab1457c | 756 | * Get and verify the address. |
1da177e4 LT |
757 | */ |
758 | memset(&fl, 0, sizeof(fl)); | |
759 | ||
4a19ec58 LAT |
760 | fl.mark = sk->sk_mark; |
761 | ||
1da177e4 | 762 | if (sin6) { |
1ab1457c | 763 | if (addr_len < SIN6_LEN_RFC2133) |
1da177e4 LT |
764 | return -EINVAL; |
765 | ||
1ab1457c | 766 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) |
a02cec21 | 767 | return -EAFNOSUPPORT; |
1da177e4 LT |
768 | |
769 | /* port is the proto value [0..255] carried in nexthdr */ | |
770 | proto = ntohs(sin6->sin6_port); | |
771 | ||
772 | if (!proto) | |
c720c7e8 ED |
773 | proto = inet->inet_num; |
774 | else if (proto != inet->inet_num) | |
a02cec21 | 775 | return -EINVAL; |
1da177e4 LT |
776 | |
777 | if (proto > 255) | |
a02cec21 | 778 | return -EINVAL; |
1da177e4 LT |
779 | |
780 | daddr = &sin6->sin6_addr; | |
781 | if (np->sndflow) { | |
782 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; | |
783 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
784 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
785 | if (flowlabel == NULL) | |
786 | return -EINVAL; | |
787 | daddr = &flowlabel->dst; | |
788 | } | |
789 | } | |
790 | ||
791 | /* | |
792 | * Otherwise it will be difficult to maintain | |
793 | * sk->sk_dst_cache. | |
794 | */ | |
795 | if (sk->sk_state == TCP_ESTABLISHED && | |
796 | ipv6_addr_equal(daddr, &np->daddr)) | |
797 | daddr = &np->daddr; | |
798 | ||
799 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
800 | sin6->sin6_scope_id && | |
801 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
802 | fl.oif = sin6->sin6_scope_id; | |
803 | } else { | |
1ab1457c | 804 | if (sk->sk_state != TCP_ESTABLISHED) |
1da177e4 | 805 | return -EDESTADDRREQ; |
1ab1457c | 806 | |
c720c7e8 | 807 | proto = inet->inet_num; |
1da177e4 LT |
808 | daddr = &np->daddr; |
809 | fl.fl6_flowlabel = np->flow_label; | |
810 | } | |
811 | ||
1da177e4 LT |
812 | if (fl.oif == 0) |
813 | fl.oif = sk->sk_bound_dev_if; | |
814 | ||
815 | if (msg->msg_controllen) { | |
816 | opt = &opt_space; | |
817 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
818 | opt->tot_len = sizeof(struct ipv6_txoptions); | |
819 | ||
13b52cd4 BH |
820 | err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, |
821 | &tclass, &dontfrag); | |
1da177e4 LT |
822 | if (err < 0) { |
823 | fl6_sock_release(flowlabel); | |
824 | return err; | |
825 | } | |
826 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { | |
827 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
828 | if (flowlabel == NULL) | |
829 | return -EINVAL; | |
830 | } | |
831 | if (!(opt->opt_nflen|opt->opt_flen)) | |
832 | opt = NULL; | |
833 | } | |
834 | if (opt == NULL) | |
835 | opt = np->opt; | |
df9890c3 YH |
836 | if (flowlabel) |
837 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
838 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 LT |
839 | |
840 | fl.proto = proto; | |
a27b58fe HC |
841 | err = rawv6_probe_proto_opt(&fl, msg); |
842 | if (err) | |
843 | goto out; | |
1ab1457c | 844 | |
876c7f41 BH |
845 | if (!ipv6_addr_any(daddr)) |
846 | ipv6_addr_copy(&fl.fl6_dst, daddr); | |
847 | else | |
848 | fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ | |
1da177e4 LT |
849 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |
850 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
851 | ||
20c59de2 | 852 | final_p = fl6_update_dst(&fl, opt, &final); |
1da177e4 LT |
853 | |
854 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) | |
855 | fl.oif = np->mcast_oif; | |
beb8d13b | 856 | security_sk_classify_flow(sk, &fl); |
1da177e4 LT |
857 | |
858 | err = ip6_dst_lookup(sk, &dst, &fl); | |
859 | if (err) | |
860 | goto out; | |
861 | if (final_p) | |
862 | ipv6_addr_copy(&fl.fl6_dst, final_p); | |
863 | ||
52479b62 AD |
864 | err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT); |
865 | if (err < 0) { | |
14e50e57 DM |
866 | if (err == -EREMOTE) |
867 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
868 | if (err < 0) | |
869 | goto out; | |
870 | } | |
1da177e4 LT |
871 | |
872 | if (hlimit < 0) { | |
873 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) | |
874 | hlimit = np->mcast_hops; | |
875 | else | |
876 | hlimit = np->hop_limit; | |
877 | if (hlimit < 0) | |
6b75d090 | 878 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
879 | } |
880 | ||
e651f03a | 881 | if (tclass < 0) |
e012d51c | 882 | tclass = np->tclass; |
41a1f8ea | 883 | |
13b52cd4 BH |
884 | if (dontfrag < 0) |
885 | dontfrag = np->dontfrag; | |
886 | ||
1da177e4 LT |
887 | if (msg->msg_flags&MSG_CONFIRM) |
888 | goto do_confirm; | |
889 | ||
890 | back_from_confirm: | |
1789a640 ED |
891 | if (inet->hdrincl) |
892 | err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, &dst, msg->msg_flags); | |
893 | else { | |
1da177e4 | 894 | lock_sock(sk); |
41a1f8ea YH |
895 | err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, |
896 | len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst, | |
13b52cd4 | 897 | msg->msg_flags, dontfrag); |
1da177e4 LT |
898 | |
899 | if (err) | |
900 | ip6_flush_pending_frames(sk); | |
901 | else if (!(msg->msg_flags & MSG_MORE)) | |
357b40a1 | 902 | err = rawv6_push_pending_frames(sk, &fl, rp); |
3ef9d943 | 903 | release_sock(sk); |
1da177e4 LT |
904 | } |
905 | done: | |
6d3e85ec | 906 | dst_release(dst); |
1ab1457c | 907 | out: |
1da177e4 LT |
908 | fl6_sock_release(flowlabel); |
909 | return err<0?err:len; | |
910 | do_confirm: | |
911 | dst_confirm(dst); | |
912 | if (!(msg->msg_flags & MSG_PROBE) || len) | |
913 | goto back_from_confirm; | |
914 | err = 0; | |
915 | goto done; | |
916 | } | |
917 | ||
1ab1457c | 918 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
919 | char __user *optval, int optlen) |
920 | { | |
921 | switch (optname) { | |
922 | case ICMPV6_FILTER: | |
923 | if (optlen > sizeof(struct icmp6_filter)) | |
924 | optlen = sizeof(struct icmp6_filter); | |
925 | if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) | |
926 | return -EFAULT; | |
927 | return 0; | |
928 | default: | |
929 | return -ENOPROTOOPT; | |
3ff50b79 | 930 | } |
1da177e4 LT |
931 | |
932 | return 0; | |
933 | } | |
934 | ||
1ab1457c | 935 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
936 | char __user *optval, int __user *optlen) |
937 | { | |
938 | int len; | |
939 | ||
940 | switch (optname) { | |
941 | case ICMPV6_FILTER: | |
942 | if (get_user(len, optlen)) | |
943 | return -EFAULT; | |
944 | if (len < 0) | |
945 | return -EINVAL; | |
946 | if (len > sizeof(struct icmp6_filter)) | |
947 | len = sizeof(struct icmp6_filter); | |
948 | if (put_user(len, optlen)) | |
949 | return -EFAULT; | |
950 | if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) | |
951 | return -EFAULT; | |
952 | return 0; | |
953 | default: | |
954 | return -ENOPROTOOPT; | |
3ff50b79 | 955 | } |
1da177e4 LT |
956 | |
957 | return 0; | |
958 | } | |
959 | ||
960 | ||
3fdadf7d | 961 | static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 962 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
963 | { |
964 | struct raw6_sock *rp = raw6_sk(sk); | |
965 | int val; | |
966 | ||
1ab1457c | 967 | if (get_user(val, (int __user *)optval)) |
1da177e4 LT |
968 | return -EFAULT; |
969 | ||
970 | switch (optname) { | |
971 | case IPV6_CHECKSUM: | |
c720c7e8 | 972 | if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 && |
1a98d05f YH |
973 | level == IPPROTO_IPV6) { |
974 | /* | |
975 | * RFC3542 tells that IPV6_CHECKSUM socket | |
976 | * option in the IPPROTO_IPV6 level is not | |
977 | * allowed on ICMPv6 sockets. | |
978 | * If you want to set it, use IPPROTO_RAW | |
979 | * level IPV6_CHECKSUM socket option | |
980 | * (Linux extension). | |
981 | */ | |
982 | return -EINVAL; | |
983 | } | |
984 | ||
1da177e4 LT |
985 | /* You may get strange result with a positive odd offset; |
986 | RFC2292bis agrees with me. */ | |
987 | if (val > 0 && (val&1)) | |
a02cec21 | 988 | return -EINVAL; |
1da177e4 LT |
989 | if (val < 0) { |
990 | rp->checksum = 0; | |
991 | } else { | |
992 | rp->checksum = 1; | |
993 | rp->offset = val; | |
994 | } | |
995 | ||
996 | return 0; | |
997 | break; | |
998 | ||
999 | default: | |
a02cec21 | 1000 | return -ENOPROTOOPT; |
1da177e4 LT |
1001 | } |
1002 | } | |
1003 | ||
3fdadf7d | 1004 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1005 | char __user *optval, unsigned int optlen) |
1da177e4 | 1006 | { |
1da177e4 LT |
1007 | switch(level) { |
1008 | case SOL_RAW: | |
1009 | break; | |
1010 | ||
1011 | case SOL_ICMPV6: | |
c720c7e8 | 1012 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
1da177e4 | 1013 | return -EOPNOTSUPP; |
3fdadf7d | 1014 | return rawv6_seticmpfilter(sk, level, optname, optval, |
1da177e4 LT |
1015 | optlen); |
1016 | case SOL_IPV6: | |
1017 | if (optname == IPV6_CHECKSUM) | |
1018 | break; | |
1019 | default: | |
3fdadf7d | 1020 | return ipv6_setsockopt(sk, level, optname, optval, |
1da177e4 | 1021 | optlen); |
3ff50b79 SH |
1022 | } |
1023 | ||
3fdadf7d DM |
1024 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1025 | } | |
1026 | ||
1027 | #ifdef CONFIG_COMPAT | |
1028 | static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname, | |
b7058842 | 1029 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1030 | { |
543d9cfe ACM |
1031 | switch (level) { |
1032 | case SOL_RAW: | |
1033 | break; | |
1034 | case SOL_ICMPV6: | |
c720c7e8 | 1035 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
543d9cfe ACM |
1036 | return -EOPNOTSUPP; |
1037 | return rawv6_seticmpfilter(sk, level, optname, optval, optlen); | |
1038 | case SOL_IPV6: | |
1039 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1040 | break; |
543d9cfe ACM |
1041 | default: |
1042 | return compat_ipv6_setsockopt(sk, level, optname, | |
1043 | optval, optlen); | |
3ff50b79 | 1044 | } |
3fdadf7d DM |
1045 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1046 | } | |
1047 | #endif | |
1048 | ||
1049 | static int do_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
1050 | char __user *optval, int __user *optlen) | |
1051 | { | |
1052 | struct raw6_sock *rp = raw6_sk(sk); | |
1053 | int val, len; | |
1da177e4 LT |
1054 | |
1055 | if (get_user(len,optlen)) | |
1056 | return -EFAULT; | |
1057 | ||
1058 | switch (optname) { | |
1059 | case IPV6_CHECKSUM: | |
1a98d05f YH |
1060 | /* |
1061 | * We allow getsockopt() for IPPROTO_IPV6-level | |
1062 | * IPV6_CHECKSUM socket option on ICMPv6 sockets | |
1063 | * since RFC3542 is silent about it. | |
1064 | */ | |
1da177e4 LT |
1065 | if (rp->checksum == 0) |
1066 | val = -1; | |
1067 | else | |
1068 | val = rp->offset; | |
1069 | break; | |
1070 | ||
1071 | default: | |
1072 | return -ENOPROTOOPT; | |
1073 | } | |
1074 | ||
1075 | len = min_t(unsigned int, sizeof(int), len); | |
1076 | ||
1077 | if (put_user(len, optlen)) | |
1078 | return -EFAULT; | |
1079 | if (copy_to_user(optval,&val,len)) | |
1080 | return -EFAULT; | |
1081 | return 0; | |
1082 | } | |
1083 | ||
3fdadf7d DM |
1084 | static int rawv6_getsockopt(struct sock *sk, int level, int optname, |
1085 | char __user *optval, int __user *optlen) | |
1086 | { | |
1087 | switch(level) { | |
1088 | case SOL_RAW: | |
1089 | break; | |
1090 | ||
1091 | case SOL_ICMPV6: | |
c720c7e8 | 1092 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
3fdadf7d DM |
1093 | return -EOPNOTSUPP; |
1094 | return rawv6_geticmpfilter(sk, level, optname, optval, | |
1095 | optlen); | |
1096 | case SOL_IPV6: | |
1097 | if (optname == IPV6_CHECKSUM) | |
1098 | break; | |
1099 | default: | |
1100 | return ipv6_getsockopt(sk, level, optname, optval, | |
1101 | optlen); | |
3ff50b79 SH |
1102 | } |
1103 | ||
3fdadf7d DM |
1104 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1105 | } | |
1106 | ||
1107 | #ifdef CONFIG_COMPAT | |
1108 | static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1109 | char __user *optval, int __user *optlen) |
3fdadf7d | 1110 | { |
543d9cfe ACM |
1111 | switch (level) { |
1112 | case SOL_RAW: | |
1113 | break; | |
1114 | case SOL_ICMPV6: | |
c720c7e8 | 1115 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
543d9cfe ACM |
1116 | return -EOPNOTSUPP; |
1117 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); | |
1118 | case SOL_IPV6: | |
1119 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1120 | break; |
543d9cfe ACM |
1121 | default: |
1122 | return compat_ipv6_getsockopt(sk, level, optname, | |
1123 | optval, optlen); | |
3ff50b79 | 1124 | } |
3fdadf7d DM |
1125 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1126 | } | |
1127 | #endif | |
1128 | ||
1da177e4 LT |
1129 | static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) |
1130 | { | |
1131 | switch(cmd) { | |
1132 | case SIOCOUTQ: | |
1133 | { | |
31e6d363 ED |
1134 | int amount = sk_wmem_alloc_get(sk); |
1135 | ||
1da177e4 LT |
1136 | return put_user(amount, (int __user *)arg); |
1137 | } | |
1138 | case SIOCINQ: | |
1139 | { | |
1140 | struct sk_buff *skb; | |
1141 | int amount = 0; | |
1142 | ||
e0f9f858 | 1143 | spin_lock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1144 | skb = skb_peek(&sk->sk_receive_queue); |
1145 | if (skb != NULL) | |
27a884dc | 1146 | amount = skb->tail - skb->transport_header; |
e0f9f858 | 1147 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
1da177e4 LT |
1148 | return put_user(amount, (int __user *)arg); |
1149 | } | |
1150 | ||
1151 | default: | |
7bc570c8 YH |
1152 | #ifdef CONFIG_IPV6_MROUTE |
1153 | return ip6mr_ioctl(sk, cmd, (void __user *)arg); | |
1154 | #else | |
1da177e4 | 1155 | return -ENOIOCTLCMD; |
7bc570c8 | 1156 | #endif |
1da177e4 LT |
1157 | } |
1158 | } | |
1159 | ||
1160 | static void rawv6_close(struct sock *sk, long timeout) | |
1161 | { | |
c720c7e8 | 1162 | if (inet_sk(sk)->inet_num == IPPROTO_RAW) |
725a8ff0 | 1163 | ip6_ra_control(sk, -1); |
7bc570c8 | 1164 | ip6mr_sk_done(sk); |
1da177e4 LT |
1165 | sk_common_release(sk); |
1166 | } | |
1167 | ||
7d06b2e0 | 1168 | static void raw6_destroy(struct sock *sk) |
22dd4850 DL |
1169 | { |
1170 | lock_sock(sk); | |
1171 | ip6_flush_pending_frames(sk); | |
1172 | release_sock(sk); | |
f23d60de | 1173 | |
7d06b2e0 | 1174 | inet6_destroy_sock(sk); |
22dd4850 DL |
1175 | } |
1176 | ||
1da177e4 LT |
1177 | static int rawv6_init_sk(struct sock *sk) |
1178 | { | |
f48d5ff1 MN |
1179 | struct raw6_sock *rp = raw6_sk(sk); |
1180 | ||
c720c7e8 | 1181 | switch (inet_sk(sk)->inet_num) { |
f48d5ff1 | 1182 | case IPPROTO_ICMPV6: |
1da177e4 LT |
1183 | rp->checksum = 1; |
1184 | rp->offset = 2; | |
f48d5ff1 MN |
1185 | break; |
1186 | case IPPROTO_MH: | |
1187 | rp->checksum = 1; | |
1188 | rp->offset = 4; | |
1189 | break; | |
1190 | default: | |
1191 | break; | |
1da177e4 | 1192 | } |
a02cec21 | 1193 | return 0; |
1da177e4 LT |
1194 | } |
1195 | ||
1196 | struct proto rawv6_prot = { | |
543d9cfe ACM |
1197 | .name = "RAWv6", |
1198 | .owner = THIS_MODULE, | |
1199 | .close = rawv6_close, | |
22dd4850 | 1200 | .destroy = raw6_destroy, |
543d9cfe ACM |
1201 | .connect = ip6_datagram_connect, |
1202 | .disconnect = udp_disconnect, | |
1203 | .ioctl = rawv6_ioctl, | |
1204 | .init = rawv6_init_sk, | |
543d9cfe ACM |
1205 | .setsockopt = rawv6_setsockopt, |
1206 | .getsockopt = rawv6_getsockopt, | |
1207 | .sendmsg = rawv6_sendmsg, | |
1208 | .recvmsg = rawv6_recvmsg, | |
1209 | .bind = rawv6_bind, | |
1210 | .backlog_rcv = rawv6_rcv_skb, | |
fc8717ba PE |
1211 | .hash = raw_hash_sk, |
1212 | .unhash = raw_unhash_sk, | |
543d9cfe | 1213 | .obj_size = sizeof(struct raw6_sock), |
fc8717ba | 1214 | .h.raw_hash = &raw_v6_hashinfo, |
3fdadf7d | 1215 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1216 | .compat_setsockopt = compat_rawv6_setsockopt, |
1217 | .compat_getsockopt = compat_rawv6_getsockopt, | |
3fdadf7d | 1218 | #endif |
1da177e4 LT |
1219 | }; |
1220 | ||
1221 | #ifdef CONFIG_PROC_FS | |
1da177e4 LT |
1222 | static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) |
1223 | { | |
1224 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1225 | struct in6_addr *dest, *src; | |
1226 | __u16 destp, srcp; | |
1227 | ||
1228 | dest = &np->daddr; | |
1229 | src = &np->rcv_saddr; | |
1230 | destp = 0; | |
c720c7e8 | 1231 | srcp = inet_sk(sp)->inet_num; |
1da177e4 LT |
1232 | seq_printf(seq, |
1233 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
a92aa318 | 1234 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1da177e4 LT |
1235 | i, |
1236 | src->s6_addr32[0], src->s6_addr32[1], | |
1237 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1238 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1239 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1240 | sp->sk_state, |
31e6d363 ED |
1241 | sk_wmem_alloc_get(sp), |
1242 | sk_rmem_alloc_get(sp), | |
1da177e4 LT |
1243 | 0, 0L, 0, |
1244 | sock_i_uid(sp), 0, | |
1245 | sock_i_ino(sp), | |
a92aa318 | 1246 | atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); |
1da177e4 LT |
1247 | } |
1248 | ||
1249 | static int raw6_seq_show(struct seq_file *seq, void *v) | |
1250 | { | |
1251 | if (v == SEQ_START_TOKEN) | |
1252 | seq_printf(seq, | |
1253 | " sl " | |
1254 | "local_address " | |
1255 | "remote_address " | |
1256 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
cb61cb9b | 1257 | " uid timeout inode ref pointer drops\n"); |
1da177e4 | 1258 | else |
42a73808 | 1259 | raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); |
1da177e4 LT |
1260 | return 0; |
1261 | } | |
1262 | ||
56b3d975 | 1263 | static const struct seq_operations raw6_seq_ops = { |
42a73808 PE |
1264 | .start = raw_seq_start, |
1265 | .next = raw_seq_next, | |
1266 | .stop = raw_seq_stop, | |
1da177e4 LT |
1267 | .show = raw6_seq_show, |
1268 | }; | |
1269 | ||
1270 | static int raw6_seq_open(struct inode *inode, struct file *file) | |
1271 | { | |
3046d767 | 1272 | return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops); |
1da177e4 LT |
1273 | } |
1274 | ||
9a32144e | 1275 | static const struct file_operations raw6_seq_fops = { |
1da177e4 LT |
1276 | .owner = THIS_MODULE, |
1277 | .open = raw6_seq_open, | |
1278 | .read = seq_read, | |
1279 | .llseek = seq_lseek, | |
f51d599f | 1280 | .release = seq_release_net, |
1da177e4 LT |
1281 | }; |
1282 | ||
2c8c1e72 | 1283 | static int __net_init raw6_init_net(struct net *net) |
1da177e4 | 1284 | { |
a308da16 | 1285 | if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops)) |
1da177e4 | 1286 | return -ENOMEM; |
a308da16 | 1287 | |
1da177e4 LT |
1288 | return 0; |
1289 | } | |
1290 | ||
2c8c1e72 | 1291 | static void __net_exit raw6_exit_net(struct net *net) |
a308da16 PE |
1292 | { |
1293 | proc_net_remove(net, "raw6"); | |
1294 | } | |
1295 | ||
1296 | static struct pernet_operations raw6_net_ops = { | |
1297 | .init = raw6_init_net, | |
1298 | .exit = raw6_exit_net, | |
1299 | }; | |
1300 | ||
1301 | int __init raw6_proc_init(void) | |
1302 | { | |
1303 | return register_pernet_subsys(&raw6_net_ops); | |
1304 | } | |
1305 | ||
1da177e4 LT |
1306 | void raw6_proc_exit(void) |
1307 | { | |
a308da16 | 1308 | unregister_pernet_subsys(&raw6_net_ops); |
1da177e4 LT |
1309 | } |
1310 | #endif /* CONFIG_PROC_FS */ | |
7f4e4868 DL |
1311 | |
1312 | /* Same as inet6_dgram_ops, sans udp_poll. */ | |
1313 | static const struct proto_ops inet6_sockraw_ops = { | |
1314 | .family = PF_INET6, | |
1315 | .owner = THIS_MODULE, | |
1316 | .release = inet6_release, | |
1317 | .bind = inet6_bind, | |
1318 | .connect = inet_dgram_connect, /* ok */ | |
1319 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
1320 | .accept = sock_no_accept, /* a do nothing */ | |
1321 | .getname = inet6_getname, | |
1322 | .poll = datagram_poll, /* ok */ | |
1323 | .ioctl = inet6_ioctl, /* must change */ | |
1324 | .listen = sock_no_listen, /* ok */ | |
1325 | .shutdown = inet_shutdown, /* ok */ | |
1326 | .setsockopt = sock_common_setsockopt, /* ok */ | |
1327 | .getsockopt = sock_common_getsockopt, /* ok */ | |
1328 | .sendmsg = inet_sendmsg, /* ok */ | |
1329 | .recvmsg = sock_common_recvmsg, /* ok */ | |
1330 | .mmap = sock_no_mmap, | |
1331 | .sendpage = sock_no_sendpage, | |
1332 | #ifdef CONFIG_COMPAT | |
1333 | .compat_setsockopt = compat_sock_common_setsockopt, | |
1334 | .compat_getsockopt = compat_sock_common_getsockopt, | |
1335 | #endif | |
1336 | }; | |
1337 | ||
1338 | static struct inet_protosw rawv6_protosw = { | |
1339 | .type = SOCK_RAW, | |
1340 | .protocol = IPPROTO_IP, /* wild card */ | |
1341 | .prot = &rawv6_prot, | |
1342 | .ops = &inet6_sockraw_ops, | |
7f4e4868 DL |
1343 | .no_check = UDP_CSUM_DEFAULT, |
1344 | .flags = INET_PROTOSW_REUSE, | |
1345 | }; | |
1346 | ||
1347 | int __init rawv6_init(void) | |
1348 | { | |
1349 | int ret; | |
1350 | ||
1351 | ret = inet6_register_protosw(&rawv6_protosw); | |
1352 | if (ret) | |
1353 | goto out; | |
1354 | out: | |
1355 | return ret; | |
1356 | } | |
1357 | ||
09f7709f | 1358 | void rawv6_exit(void) |
7f4e4868 DL |
1359 | { |
1360 | inet6_unregister_protosw(&rawv6_protosw); | |
1361 | } |