blob: 8897ccf8086afacfc643163e89b740cc4a6df13c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * RAW sockets for IPv6
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003 * Linux INET6 implementation
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
5 * Authors:
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09006 * Pedro Roque <roque@di.fc.ul.pt>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 *
8 * Adapted from linux/net/ipv4/raw.c
9 *
10 * $Id: raw.c,v 1.51 2002/02/01 22:01:04 davem Exp $
11 *
12 * Fixes:
13 * Hideaki YOSHIFUJI : sin6_scope_id support
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +090014 * YOSHIFUJI,H.@USAGI : raw checksum (RFC2292(bis) compliance)
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License
19 * as published by the Free Software Foundation; either version
20 * 2 of the License, or (at your option) any later version.
21 */
22
23#include <linux/errno.h>
24#include <linux/types.h>
25#include <linux/socket.h>
26#include <linux/sockios.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/net.h>
28#include <linux/in6.h>
29#include <linux/netdevice.h>
30#include <linux/if_arp.h>
31#include <linux/icmpv6.h>
32#include <linux/netfilter.h>
33#include <linux/netfilter_ipv6.h>
Herbert Xu3305b802005-12-13 23:16:37 -080034#include <linux/skbuff.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <asm/uaccess.h>
36#include <asm/ioctls.h>
37
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020038#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#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>
Arnaldo Carvalho de Meloc752f072005-08-09 20:08:28 -070052#include <net/tcp_states.h>
Masahide NAKAMURA59fbb3a2007-06-26 23:56:32 -070053#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -070054#include <net/mip6.h>
55#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -080057#include <net/raw.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070058#include <net/rawv6.h>
59#include <net/xfrm.h>
60
61#include <linux/proc_fs.h>
62#include <linux/seq_file.h>
63
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -080064static struct raw_hashinfo raw_v6_hashinfo = {
65 .lock = __RW_LOCK_UNLOCKED(),
66};
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
68static void raw_v6_hash(struct sock *sk)
69{
Pavel Emelyanov65b4c502007-11-19 22:37:24 -080070 raw_hash_sk(sk, &raw_v6_hashinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -070071}
72
73static void raw_v6_unhash(struct sock *sk)
74{
Pavel Emelyanovab707682007-11-19 22:37:58 -080075 raw_unhash_sk(sk, &raw_v6_hashinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -070076}
77
78
Pavel Emelyanovbe185882008-01-14 05:35:31 -080079static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
80 unsigned short num, struct in6_addr *loc_addr,
81 struct in6_addr *rmt_addr, int dif)
Linus Torvalds1da177e2005-04-16 15:20:36 -070082{
83 struct hlist_node *node;
84 int is_multicast = ipv6_addr_is_multicast(loc_addr);
85
86 sk_for_each_from(sk, node)
87 if (inet_sk(sk)->num == num) {
88 struct ipv6_pinfo *np = inet6_sk(sk);
89
Pavel Emelyanovbe185882008-01-14 05:35:31 -080090 if (sk->sk_net != net)
91 continue;
92
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 if (!ipv6_addr_any(&np->daddr) &&
94 !ipv6_addr_equal(&np->daddr, rmt_addr))
95 continue;
96
Andrew McDonald0bd1b592005-08-09 19:44:42 -070097 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
98 continue;
99
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 if (!ipv6_addr_any(&np->rcv_saddr)) {
101 if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
102 goto found;
103 if (is_multicast &&
104 inet6_mc_check(sk, loc_addr, rmt_addr))
105 goto found;
106 continue;
107 }
108 goto found;
109 }
110 sk = NULL;
111found:
112 return sk;
113}
114
115/*
116 * 0 - deliver
117 * 1 - block
118 */
119static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
120{
121 struct icmp6hdr *icmph;
122 struct raw6_sock *rp = raw6_sk(sk);
123
124 if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) {
125 __u32 *data = &rp->filter.data[0];
126 int bit_nr;
127
128 icmph = (struct icmp6hdr *) skb->data;
129 bit_nr = icmph->icmp6_type;
130
131 return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0;
132 }
133 return 0;
134}
135
Masahide NAKAMURA59fbb3a2007-06-26 23:56:32 -0700136#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
137static int (*mh_filter)(struct sock *sock, struct sk_buff *skb);
138
139int rawv6_mh_filter_register(int (*filter)(struct sock *sock,
140 struct sk_buff *skb))
141{
142 rcu_assign_pointer(mh_filter, filter);
143 return 0;
144}
145EXPORT_SYMBOL(rawv6_mh_filter_register);
146
147int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock,
148 struct sk_buff *skb))
149{
150 rcu_assign_pointer(mh_filter, NULL);
151 synchronize_rcu();
152 return 0;
153}
154EXPORT_SYMBOL(rawv6_mh_filter_unregister);
155
156#endif
157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158/*
159 * demultiplex raw sockets.
160 * (should consider queueing the skb in the sock receive_queue
161 * without calling rawv6.c)
162 *
163 * Caller owns SKB so we must make clones.
164 */
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800165static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166{
167 struct in6_addr *saddr;
168 struct in6_addr *daddr;
169 struct sock *sk;
Patrick McHardyd13964f2005-08-09 19:45:02 -0700170 int delivered = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 __u8 hash;
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800172 struct net *net;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700174 saddr = &ipv6_hdr(skb)->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 daddr = saddr + 1;
176
177 hash = nexthdr & (MAX_INET_PROTOS - 1);
178
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800179 read_lock(&raw_v6_hashinfo.lock);
180 sk = sk_head(&raw_v6_hashinfo.ht[hash]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
182 /*
183 * The first socket found will be delivered after
184 * delivery to transport protocols.
185 */
186
187 if (sk == NULL)
188 goto out;
189
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800190 net = skb->dev->nd_net;
191 sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
193 while (sk) {
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700194 int filtered;
195
Patrick McHardyd13964f2005-08-09 19:45:02 -0700196 delivered = 1;
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700197 switch (nexthdr) {
198 case IPPROTO_ICMPV6:
199 filtered = icmpv6_filter(sk, skb);
200 break;
Masahide NAKAMURA59fbb3a2007-06-26 23:56:32 -0700201
202#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700203 case IPPROTO_MH:
Masahide NAKAMURA59fbb3a2007-06-26 23:56:32 -0700204 {
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700205 /* XXX: To validate MH only once for each packet,
206 * this is placed here. It should be after checking
207 * xfrm policy, however it doesn't. The checking xfrm
208 * policy is placed in rawv6_rcv() because it is
209 * required for each socket.
210 */
Masahide NAKAMURA59fbb3a2007-06-26 23:56:32 -0700211 int (*filter)(struct sock *sock, struct sk_buff *skb);
212
213 filter = rcu_dereference(mh_filter);
214 filtered = filter ? filter(sk, skb) : 0;
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700215 break;
Masahide NAKAMURA59fbb3a2007-06-26 23:56:32 -0700216 }
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700217#endif
218 default:
219 filtered = 0;
220 break;
221 }
222
223 if (filtered < 0)
224 break;
225 if (filtered == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
227
228 /* Not releasing hash table! */
Yasuyuki Kozakai9fb9cbb2005-11-09 16:38:16 -0800229 if (clone) {
230 nf_reset(clone);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 rawv6_rcv(sk, clone);
Yasuyuki Kozakai9fb9cbb2005-11-09 16:38:16 -0800232 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 }
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800234 sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
YOSHIFUJI Hideaki2dac4b92005-09-01 17:44:49 -0700235 IP6CB(skb)->iif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 }
237out:
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800238 read_unlock(&raw_v6_hashinfo.lock);
Patrick McHardyd13964f2005-08-09 19:45:02 -0700239 return delivered;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240}
241
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800242int raw6_local_deliver(struct sk_buff *skb, int nexthdr)
243{
244 struct sock *raw_sk;
245
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800246 raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]);
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800247 if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
248 raw_sk = NULL;
249
250 return raw_sk != NULL;
251}
252
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253/* This cleans up af_inet6 a bit. -DaveM */
254static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
255{
256 struct inet_sock *inet = inet_sk(sk);
257 struct ipv6_pinfo *np = inet6_sk(sk);
258 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
Al Viroe69a4ad2006-11-14 20:56:00 -0800259 __be32 v4addr = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 int addr_type;
261 int err;
262
263 if (addr_len < SIN6_LEN_RFC2133)
264 return -EINVAL;
265 addr_type = ipv6_addr_type(&addr->sin6_addr);
266
267 /* Raw sockets are IPv6 only */
268 if (addr_type == IPV6_ADDR_MAPPED)
269 return(-EADDRNOTAVAIL);
270
271 lock_sock(sk);
272
273 err = -EINVAL;
274 if (sk->sk_state != TCP_CLOSE)
275 goto out;
276
277 /* Check if the address belongs to the host. */
278 if (addr_type != IPV6_ADDR_ANY) {
279 struct net_device *dev = NULL;
280
281 if (addr_type & IPV6_ADDR_LINKLOCAL) {
282 if (addr_len >= sizeof(struct sockaddr_in6) &&
283 addr->sin6_scope_id) {
284 /* Override any existing binding, if another
285 * one is supplied by user.
286 */
287 sk->sk_bound_dev_if = addr->sin6_scope_id;
288 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900289
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 /* Binding to link-local address requires an interface */
291 if (!sk->sk_bound_dev_if)
292 goto out;
293
Pavel Emelyanove5ba31f2008-01-14 05:36:27 -0800294 dev = dev_get_by_index(sk->sk_net, sk->sk_bound_dev_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 if (!dev) {
296 err = -ENODEV;
297 goto out;
298 }
299 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900300
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 /* ipv4 addr of the socket is invalid. Only the
302 * unspecified and mapped address have a v4 equivalent.
303 */
304 v4addr = LOOPBACK4_IPV6;
305 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
306 err = -EADDRNOTAVAIL;
Pavel Emelyanove5ba31f2008-01-14 05:36:27 -0800307 if (!ipv6_chk_addr(sk->sk_net, &addr->sin6_addr,
Daniel Lezcanobfeade02008-01-10 22:43:18 -0800308 dev, 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 if (dev)
310 dev_put(dev);
311 goto out;
312 }
313 }
314 if (dev)
315 dev_put(dev);
316 }
317
318 inet->rcv_saddr = inet->saddr = v4addr;
319 ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
320 if (!(addr_type & IPV6_ADDR_MULTICAST))
321 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
322 err = 0;
323out:
324 release_sock(sk);
325 return err;
326}
327
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800328static void rawv6_err(struct sock *sk, struct sk_buff *skb,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 struct inet6_skb_parm *opt,
Al Viro04ce6902006-11-08 00:21:01 -0800330 int type, int code, int offset, __be32 info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331{
332 struct inet_sock *inet = inet_sk(sk);
333 struct ipv6_pinfo *np = inet6_sk(sk);
334 int err;
335 int harderr;
336
337 /* Report error on raw socket, if:
338 1. User requested recverr.
339 2. Socket is connected (otherwise the error indication
340 is useless without recverr and error is hard.
341 */
342 if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
343 return;
344
345 harderr = icmpv6_err_convert(type, code, &err);
346 if (type == ICMPV6_PKT_TOOBIG)
347 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
348
349 if (np->recverr) {
350 u8 *payload = skb->data;
351 if (!inet->hdrincl)
352 payload += offset;
353 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
354 }
355
356 if (np->recverr || harderr) {
357 sk->sk_err = err;
358 sk->sk_error_report(sk);
359 }
360}
361
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800362void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
363 int type, int code, int inner_offset, __be32 info)
364{
365 struct sock *sk;
366 int hash;
367 struct in6_addr *saddr, *daddr;
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800368 struct net *net;
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800369
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800370 hash = nexthdr & (RAW_HTABLE_SIZE - 1);
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800371
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800372 read_lock(&raw_v6_hashinfo.lock);
373 sk = sk_head(&raw_v6_hashinfo.ht[hash]);
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800374 if (sk != NULL) {
375 saddr = &ipv6_hdr(skb)->saddr;
376 daddr = &ipv6_hdr(skb)->daddr;
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800377 net = skb->dev->nd_net;
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800378
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800379 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800380 IP6CB(skb)->iif))) {
381 rawv6_err(sk, skb, NULL, type, code,
382 inner_offset, info);
383 sk = sk_next(sk);
384 }
385 }
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800386 read_unlock(&raw_v6_hashinfo.lock);
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800387}
388
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
390{
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900391 if ((raw6_sk(sk)->checksum || sk->sk_filter) &&
Herbert Xufb286bb2005-11-10 13:01:24 -0800392 skb_checksum_complete(skb)) {
Wang Chena92aa312007-11-13 20:31:14 -0800393 atomic_inc(&sk->sk_drops);
Herbert Xufb286bb2005-11-10 13:01:24 -0800394 kfree_skb(skb);
395 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 }
397
398 /* Charge it to the socket. */
399 if (sock_queue_rcv_skb(sk,skb)<0) {
Wang Chena92aa312007-11-13 20:31:14 -0800400 atomic_inc(&sk->sk_drops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 kfree_skb(skb);
402 return 0;
403 }
404
405 return 0;
406}
407
408/*
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900409 * This is next to useless...
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 * if we demultiplex in network layer we don't need the extra call
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900411 * just to queue the skb...
412 * maybe we could have the network decide upon a hint if it
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 * should call raw_rcv for demultiplexing
414 */
415int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
416{
417 struct inet_sock *inet = inet_sk(sk);
418 struct raw6_sock *rp = raw6_sk(sk);
419
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900420 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
Wang Chena92aa312007-11-13 20:31:14 -0800421 atomic_inc(&sk->sk_drops);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900422 kfree_skb(skb);
423 return NET_RX_DROP;
424 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
426 if (!rp->checksum)
427 skb->ip_summed = CHECKSUM_UNNECESSARY;
428
Patrick McHardy84fa7932006-08-29 16:44:56 -0700429 if (skb->ip_summed == CHECKSUM_COMPLETE) {
Arnaldo Carvalho de Melod56f90a2007-04-10 20:50:43 -0700430 skb_postpull_rcsum(skb, skb_network_header(skb),
Arnaldo Carvalho de Melocfe1fc72007-03-16 17:26:39 -0300431 skb_network_header_len(skb));
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700432 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
433 &ipv6_hdr(skb)->daddr,
Herbert Xufb286bb2005-11-10 13:01:24 -0800434 skb->len, inet->num, skb->csum))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 skb->ip_summed = CHECKSUM_UNNECESSARY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 }
Herbert Xu60476372007-04-09 11:59:39 -0700437 if (!skb_csum_unnecessary(skb))
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700438 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
439 &ipv6_hdr(skb)->daddr,
440 skb->len,
441 inet->num, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442
443 if (inet->hdrincl) {
Herbert Xufb286bb2005-11-10 13:01:24 -0800444 if (skb_checksum_complete(skb)) {
Wang Chena92aa312007-11-13 20:31:14 -0800445 atomic_inc(&sk->sk_drops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 kfree_skb(skb);
447 return 0;
448 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 }
450
451 rawv6_rcv_skb(sk, skb);
452 return 0;
453}
454
455
456/*
457 * This should be easy, if there is something there
458 * we return it, otherwise we block.
459 */
460
461static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
462 struct msghdr *msg, size_t len,
463 int noblock, int flags, int *addr_len)
464{
465 struct ipv6_pinfo *np = inet6_sk(sk);
466 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
467 struct sk_buff *skb;
468 size_t copied;
469 int err;
470
471 if (flags & MSG_OOB)
472 return -EOPNOTSUPP;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900473
474 if (addr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 *addr_len=sizeof(*sin6);
476
477 if (flags & MSG_ERRQUEUE)
478 return ipv6_recv_error(sk, msg, len);
479
480 skb = skb_recv_datagram(sk, flags, noblock, &err);
481 if (!skb)
482 goto out;
483
484 copied = skb->len;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900485 if (copied > len) {
486 copied = len;
487 msg->msg_flags |= MSG_TRUNC;
488 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489
Herbert Xu60476372007-04-09 11:59:39 -0700490 if (skb_csum_unnecessary(skb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
492 } else if (msg->msg_flags&MSG_TRUNC) {
Herbert Xufb286bb2005-11-10 13:01:24 -0800493 if (__skb_checksum_complete(skb))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 goto csum_copy_err;
495 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
496 } else {
497 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
498 if (err == -EINVAL)
499 goto csum_copy_err;
500 }
501 if (err)
502 goto out_free;
503
504 /* Copy the address. */
505 if (sin6) {
506 sin6->sin6_family = AF_INET6;
Tetsuo Handaf59fc7f2006-07-25 17:05:35 -0700507 sin6->sin6_port = 0;
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700508 ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 sin6->sin6_flowinfo = 0;
510 sin6->sin6_scope_id = 0;
511 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
512 sin6->sin6_scope_id = IP6CB(skb)->iif;
513 }
514
515 sock_recv_timestamp(msg, sk, skb);
516
517 if (np->rxopt.all)
518 datagram_recv_ctl(sk, msg, skb);
519
520 err = copied;
521 if (flags & MSG_TRUNC)
522 err = skb->len;
523
524out_free:
525 skb_free_datagram(sk, skb);
526out:
527 return err;
528
529csum_copy_err:
Herbert Xu3305b802005-12-13 23:16:37 -0800530 skb_kill_datagram(sk, skb, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531
532 /* Error for blocking case is chosen to masquerade
533 as some normal condition.
534 */
535 err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
Wang Chena92aa312007-11-13 20:31:14 -0800536 atomic_inc(&sk->sk_drops);
Herbert Xu3305b802005-12-13 23:16:37 -0800537 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538}
539
540static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
Herbert Xu357b40a2005-04-19 22:30:14 -0700541 struct raw6_sock *rp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542{
543 struct sk_buff *skb;
544 int err = 0;
Herbert Xu357b40a2005-04-19 22:30:14 -0700545 int offset;
546 int len;
Herbert Xu679a8732005-05-03 14:24:36 -0700547 int total_len;
Al Viro868c86b2006-11-14 21:35:48 -0800548 __wsum tmp_csum;
549 __sum16 csum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550
551 if (!rp->checksum)
552 goto send;
553
554 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
555 goto out;
556
Herbert Xu357b40a2005-04-19 22:30:14 -0700557 offset = rp->offset;
Arnaldo Carvalho de Melod56f90a2007-04-10 20:50:43 -0700558 total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) -
559 skb->data);
Herbert Xu679a8732005-05-03 14:24:36 -0700560 if (offset >= total_len - 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 err = -EINVAL;
Herbert Xu357b40a2005-04-19 22:30:14 -0700562 ip6_flush_pending_frames(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 goto out;
564 }
565
566 /* should be check HW csum miyazawa */
567 if (skb_queue_len(&sk->sk_write_queue) == 1) {
568 /*
569 * Only one fragment on the socket.
570 */
571 tmp_csum = skb->csum;
572 } else {
Herbert Xu357b40a2005-04-19 22:30:14 -0700573 struct sk_buff *csum_skb = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 tmp_csum = 0;
575
576 skb_queue_walk(&sk->sk_write_queue, skb) {
577 tmp_csum = csum_add(tmp_csum, skb->csum);
Herbert Xu357b40a2005-04-19 22:30:14 -0700578
579 if (csum_skb)
580 continue;
581
Arnaldo Carvalho de Meloea2ae172007-04-25 17:55:53 -0700582 len = skb->len - skb_transport_offset(skb);
Herbert Xu357b40a2005-04-19 22:30:14 -0700583 if (offset >= len) {
584 offset -= len;
585 continue;
586 }
587
588 csum_skb = skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 }
Herbert Xu357b40a2005-04-19 22:30:14 -0700590
591 skb = csum_skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 }
593
Arnaldo Carvalho de Meloea2ae172007-04-25 17:55:53 -0700594 offset += skb_transport_offset(skb);
Herbert Xu357b40a2005-04-19 22:30:14 -0700595 if (skb_copy_bits(skb, offset, &csum, 2))
596 BUG();
597
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 /* in case cksum was not initialized */
Herbert Xu357b40a2005-04-19 22:30:14 -0700599 if (unlikely(csum))
Al Viro5f92a732006-11-14 21:36:54 -0800600 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601
Al Viro868c86b2006-11-14 21:35:48 -0800602 csum = csum_ipv6_magic(&fl->fl6_src,
Herbert Xu357b40a2005-04-19 22:30:14 -0700603 &fl->fl6_dst,
Herbert Xu679a8732005-05-03 14:24:36 -0700604 total_len, fl->proto, tmp_csum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605
Al Virof6ab0282006-11-16 02:36:50 -0800606 if (csum == 0 && fl->proto == IPPROTO_UDP)
607 csum = CSUM_MANGLED_0;
Herbert Xu357b40a2005-04-19 22:30:14 -0700608
Herbert Xu357b40a2005-04-19 22:30:14 -0700609 if (skb_store_bits(skb, offset, &csum, 2))
610 BUG();
611
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612send:
613 err = ip6_push_pending_frames(sk);
614out:
615 return err;
616}
617
618static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900619 struct flowi *fl, struct rt6_info *rt,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 unsigned int flags)
621{
Herbert Xu3320da82005-04-19 22:32:22 -0700622 struct ipv6_pinfo *np = inet6_sk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 struct ipv6hdr *iph;
624 struct sk_buff *skb;
625 unsigned int hh_len;
626 int err;
627
628 if (length > rt->u.dst.dev->mtu) {
629 ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
630 return -EMSGSIZE;
631 }
632 if (flags&MSG_PROBE)
633 goto out;
634
635 hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
636
637 skb = sock_alloc_send_skb(sk, length+hh_len+15,
638 flags&MSG_DONTWAIT, &err);
639 if (skb == NULL)
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900640 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 skb_reserve(skb, hh_len);
642
643 skb->priority = sk->sk_priority;
Laszlo Attila Toth4a19ec52008-01-30 19:08:16 -0800644 skb->mark = sk->sk_mark;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 skb->dst = dst_clone(&rt->u.dst);
646
Arnaldo Carvalho de Melo1ced98e2007-03-10 19:57:15 -0300647 skb_put(skb, length);
648 skb_reset_network_header(skb);
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700649 iph = ipv6_hdr(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650
651 skb->ip_summed = CHECKSUM_NONE;
652
Arnaldo Carvalho de Melob0e380b2007-04-10 21:21:55 -0700653 skb->transport_header = skb->network_header;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 err = memcpy_fromiovecend((void *)iph, from, 0, length);
655 if (err)
656 goto error_fault;
657
YOSHIFUJI Hideakia11d2062006-11-04 20:11:37 +0900658 IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS);
Patrick McHardy6e23ae22007-11-19 18:53:30 -0800659 err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 dst_output);
661 if (err > 0)
Herbert Xu3320da82005-04-19 22:32:22 -0700662 err = np->recverr ? net_xmit_errno(err) : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 if (err)
664 goto error;
665out:
666 return 0;
667
668error_fault:
669 err = -EFAULT;
670 kfree_skb(skb);
671error:
YOSHIFUJI Hideakia11d2062006-11-04 20:11:37 +0900672 IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900673 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674}
675
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800676static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677{
678 struct iovec *iov;
679 u8 __user *type = NULL;
680 u8 __user *code = NULL;
Masahide NAKAMURA6e8f4d42006-08-23 20:36:47 -0700681 u8 len = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 int probed = 0;
683 int i;
684
685 if (!msg->msg_iov)
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800686 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687
688 for (i = 0; i < msg->msg_iovlen; i++) {
689 iov = &msg->msg_iov[i];
690 if (!iov)
691 continue;
692
693 switch (fl->proto) {
694 case IPPROTO_ICMPV6:
695 /* check if one-byte field is readable or not. */
696 if (iov->iov_base && iov->iov_len < 1)
697 break;
698
699 if (!type) {
700 type = iov->iov_base;
701 /* check if code field is readable or not. */
702 if (iov->iov_len > 1)
703 code = type + 1;
704 } else if (!code)
705 code = iov->iov_base;
706
707 if (type && code) {
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800708 if (get_user(fl->fl_icmp_type, type) ||
709 get_user(fl->fl_icmp_code, code))
710 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 probed = 1;
712 }
713 break;
Masahide NAKAMURA6e8f4d42006-08-23 20:36:47 -0700714 case IPPROTO_MH:
715 if (iov->iov_base && iov->iov_len < 1)
716 break;
717 /* check if type field is readable or not. */
718 if (iov->iov_len > 2 - len) {
719 u8 __user *p = iov->iov_base;
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800720 if (get_user(fl->fl_mh_type, &p[2 - len]))
721 return -EFAULT;
Masahide NAKAMURA6e8f4d42006-08-23 20:36:47 -0700722 probed = 1;
723 } else
724 len += iov->iov_len;
725
726 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 default:
728 probed = 1;
729 break;
730 }
731 if (probed)
732 break;
733 }
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800734 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735}
736
737static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
738 struct msghdr *msg, size_t len)
739{
740 struct ipv6_txoptions opt_space;
741 struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
742 struct in6_addr *daddr, *final_p = NULL, final;
743 struct inet_sock *inet = inet_sk(sk);
744 struct ipv6_pinfo *np = inet6_sk(sk);
745 struct raw6_sock *rp = raw6_sk(sk);
746 struct ipv6_txoptions *opt = NULL;
747 struct ip6_flowlabel *flowlabel = NULL;
748 struct dst_entry *dst = NULL;
749 struct flowi fl;
750 int addr_len = msg->msg_namelen;
751 int hlimit = -1;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900752 int tclass = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 u16 proto;
754 int err;
755
756 /* Rough check on arithmetic overflow,
YOSHIFUJI Hideakib59e1392007-03-30 14:45:35 -0700757 better check is made in ip6_append_data().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 */
YOSHIFUJI Hideakib59e1392007-03-30 14:45:35 -0700759 if (len > INT_MAX)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 return -EMSGSIZE;
761
762 /* Mirror BSD error message compatibility */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900763 if (msg->msg_flags & MSG_OOB)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 return -EOPNOTSUPP;
765
766 /*
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900767 * Get and verify the address.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 */
769 memset(&fl, 0, sizeof(fl));
770
Laszlo Attila Toth4a19ec52008-01-30 19:08:16 -0800771 fl.mark = sk->sk_mark;
772
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 if (sin6) {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900774 if (addr_len < SIN6_LEN_RFC2133)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775 return -EINVAL;
776
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900777 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 return(-EAFNOSUPPORT);
779
780 /* port is the proto value [0..255] carried in nexthdr */
781 proto = ntohs(sin6->sin6_port);
782
783 if (!proto)
784 proto = inet->num;
785 else if (proto != inet->num)
786 return(-EINVAL);
787
788 if (proto > 255)
789 return(-EINVAL);
790
791 daddr = &sin6->sin6_addr;
792 if (np->sndflow) {
793 fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
794 if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
795 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
796 if (flowlabel == NULL)
797 return -EINVAL;
798 daddr = &flowlabel->dst;
799 }
800 }
801
802 /*
803 * Otherwise it will be difficult to maintain
804 * sk->sk_dst_cache.
805 */
806 if (sk->sk_state == TCP_ESTABLISHED &&
807 ipv6_addr_equal(daddr, &np->daddr))
808 daddr = &np->daddr;
809
810 if (addr_len >= sizeof(struct sockaddr_in6) &&
811 sin6->sin6_scope_id &&
812 ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
813 fl.oif = sin6->sin6_scope_id;
814 } else {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900815 if (sk->sk_state != TCP_ESTABLISHED)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 return -EDESTADDRREQ;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900817
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 proto = inet->num;
819 daddr = &np->daddr;
820 fl.fl6_flowlabel = np->flow_label;
821 }
822
823 if (ipv6_addr_any(daddr)) {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900824 /*
825 * unspecified destination address
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 * treated as error... is this correct ?
827 */
828 fl6_sock_release(flowlabel);
829 return(-EINVAL);
830 }
831
832 if (fl.oif == 0)
833 fl.oif = sk->sk_bound_dev_if;
834
835 if (msg->msg_controllen) {
836 opt = &opt_space;
837 memset(opt, 0, sizeof(struct ipv6_txoptions));
838 opt->tot_len = sizeof(struct ipv6_txoptions);
839
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900840 err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 if (err < 0) {
842 fl6_sock_release(flowlabel);
843 return err;
844 }
845 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
846 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
847 if (flowlabel == NULL)
848 return -EINVAL;
849 }
850 if (!(opt->opt_nflen|opt->opt_flen))
851 opt = NULL;
852 }
853 if (opt == NULL)
854 opt = np->opt;
YOSHIFUJI Hideakidf9890c2005-11-20 12:23:18 +0900855 if (flowlabel)
856 opt = fl6_merge_options(&opt_space, flowlabel, opt);
857 opt = ipv6_fixup_options(&opt_space, opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858
859 fl.proto = proto;
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800860 err = rawv6_probe_proto_opt(&fl, msg);
861 if (err)
862 goto out;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900863
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 ipv6_addr_copy(&fl.fl6_dst, daddr);
865 if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
866 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
867
868 /* merge ip6_build_xmit from ip6_output */
869 if (opt && opt->srcrt) {
870 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
871 ipv6_addr_copy(&final, &fl.fl6_dst);
872 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
873 final_p = &final;
874 }
875
876 if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
877 fl.oif = np->mcast_oif;
Venkat Yekkiralabeb8d132006-08-04 23:12:42 -0700878 security_sk_classify_flow(sk, &fl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879
880 err = ip6_dst_lookup(sk, &dst, &fl);
881 if (err)
882 goto out;
883 if (final_p)
884 ipv6_addr_copy(&fl.fl6_dst, final_p);
885
Herbert Xubb728452007-12-12 18:48:58 -0800886 if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) {
David S. Miller14e50e52007-05-24 18:17:54 -0700887 if (err == -EREMOTE)
888 err = ip6_dst_blackhole(sk, &dst, &fl);
889 if (err < 0)
890 goto out;
891 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892
893 if (hlimit < 0) {
894 if (ipv6_addr_is_multicast(&fl.fl6_dst))
895 hlimit = np->mcast_hops;
896 else
897 hlimit = np->hop_limit;
898 if (hlimit < 0)
899 hlimit = dst_metric(dst, RTAX_HOPLIMIT);
900 if (hlimit < 0)
901 hlimit = ipv6_get_hoplimit(dst->dev);
902 }
903
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900904 if (tclass < 0) {
YOSHIFUJI Hideakie012d512006-09-13 20:01:28 -0700905 tclass = np->tclass;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900906 if (tclass < 0)
907 tclass = 0;
908 }
909
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 if (msg->msg_flags&MSG_CONFIRM)
911 goto do_confirm;
912
913back_from_confirm:
914 if (inet->hdrincl) {
915 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
916 } else {
917 lock_sock(sk);
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900918 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
919 len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
920 msg->msg_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921
922 if (err)
923 ip6_flush_pending_frames(sk);
924 else if (!(msg->msg_flags & MSG_MORE))
Herbert Xu357b40a2005-04-19 22:30:14 -0700925 err = rawv6_push_pending_frames(sk, &fl, rp);
YOSHIFUJI Hideaki3ef9d942007-09-14 16:45:40 -0700926 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927 }
928done:
Nicolas DICHTEL6d3e85e2006-02-13 15:56:13 -0800929 dst_release(dst);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900930out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 fl6_sock_release(flowlabel);
932 return err<0?err:len;
933do_confirm:
934 dst_confirm(dst);
935 if (!(msg->msg_flags & MSG_PROBE) || len)
936 goto back_from_confirm;
937 err = 0;
938 goto done;
939}
940
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900941static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 char __user *optval, int optlen)
943{
944 switch (optname) {
945 case ICMPV6_FILTER:
946 if (optlen > sizeof(struct icmp6_filter))
947 optlen = sizeof(struct icmp6_filter);
948 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
949 return -EFAULT;
950 return 0;
951 default:
952 return -ENOPROTOOPT;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700953 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954
955 return 0;
956}
957
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900958static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 char __user *optval, int __user *optlen)
960{
961 int len;
962
963 switch (optname) {
964 case ICMPV6_FILTER:
965 if (get_user(len, optlen))
966 return -EFAULT;
967 if (len < 0)
968 return -EINVAL;
969 if (len > sizeof(struct icmp6_filter))
970 len = sizeof(struct icmp6_filter);
971 if (put_user(len, optlen))
972 return -EFAULT;
973 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
974 return -EFAULT;
975 return 0;
976 default:
977 return -ENOPROTOOPT;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700978 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979
980 return 0;
981}
982
983
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800984static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 char __user *optval, int optlen)
986{
987 struct raw6_sock *rp = raw6_sk(sk);
988 int val;
989
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900990 if (get_user(val, (int __user *)optval))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 return -EFAULT;
992
993 switch (optname) {
994 case IPV6_CHECKSUM:
995 /* You may get strange result with a positive odd offset;
996 RFC2292bis agrees with me. */
997 if (val > 0 && (val&1))
998 return(-EINVAL);
999 if (val < 0) {
1000 rp->checksum = 0;
1001 } else {
1002 rp->checksum = 1;
1003 rp->offset = val;
1004 }
1005
1006 return 0;
1007 break;
1008
1009 default:
1010 return(-ENOPROTOOPT);
1011 }
1012}
1013
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001014static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1015 char __user *optval, int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 switch(level) {
1018 case SOL_RAW:
1019 break;
1020
1021 case SOL_ICMPV6:
1022 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1023 return -EOPNOTSUPP;
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001024 return rawv6_seticmpfilter(sk, level, optname, optval,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025 optlen);
1026 case SOL_IPV6:
1027 if (optname == IPV6_CHECKSUM)
1028 break;
1029 default:
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001030 return ipv6_setsockopt(sk, level, optname, optval,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031 optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001032 }
1033
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001034 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1035}
1036
1037#ifdef CONFIG_COMPAT
1038static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001039 char __user *optval, int optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001040{
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001041 switch (level) {
1042 case SOL_RAW:
1043 break;
1044 case SOL_ICMPV6:
1045 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1046 return -EOPNOTSUPP;
1047 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1048 case SOL_IPV6:
1049 if (optname == IPV6_CHECKSUM)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001050 break;
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001051 default:
1052 return compat_ipv6_setsockopt(sk, level, optname,
1053 optval, optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001054 }
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001055 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1056}
1057#endif
1058
1059static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1060 char __user *optval, int __user *optlen)
1061{
1062 struct raw6_sock *rp = raw6_sk(sk);
1063 int val, len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064
1065 if (get_user(len,optlen))
1066 return -EFAULT;
1067
1068 switch (optname) {
1069 case IPV6_CHECKSUM:
1070 if (rp->checksum == 0)
1071 val = -1;
1072 else
1073 val = rp->offset;
1074 break;
1075
1076 default:
1077 return -ENOPROTOOPT;
1078 }
1079
1080 len = min_t(unsigned int, sizeof(int), len);
1081
1082 if (put_user(len, optlen))
1083 return -EFAULT;
1084 if (copy_to_user(optval,&val,len))
1085 return -EFAULT;
1086 return 0;
1087}
1088
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001089static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1090 char __user *optval, int __user *optlen)
1091{
1092 switch(level) {
1093 case SOL_RAW:
1094 break;
1095
1096 case SOL_ICMPV6:
1097 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1098 return -EOPNOTSUPP;
1099 return rawv6_geticmpfilter(sk, level, optname, optval,
1100 optlen);
1101 case SOL_IPV6:
1102 if (optname == IPV6_CHECKSUM)
1103 break;
1104 default:
1105 return ipv6_getsockopt(sk, level, optname, optval,
1106 optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001107 }
1108
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001109 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1110}
1111
1112#ifdef CONFIG_COMPAT
1113static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001114 char __user *optval, int __user *optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001115{
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001116 switch (level) {
1117 case SOL_RAW:
1118 break;
1119 case SOL_ICMPV6:
1120 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1121 return -EOPNOTSUPP;
1122 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1123 case SOL_IPV6:
1124 if (optname == IPV6_CHECKSUM)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001125 break;
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001126 default:
1127 return compat_ipv6_getsockopt(sk, level, optname,
1128 optval, optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001129 }
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001130 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1131}
1132#endif
1133
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1135{
1136 switch(cmd) {
1137 case SIOCOUTQ:
1138 {
1139 int amount = atomic_read(&sk->sk_wmem_alloc);
1140 return put_user(amount, (int __user *)arg);
1141 }
1142 case SIOCINQ:
1143 {
1144 struct sk_buff *skb;
1145 int amount = 0;
1146
Herbert Xue0f9f852005-06-18 22:56:18 -07001147 spin_lock_bh(&sk->sk_receive_queue.lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148 skb = skb_peek(&sk->sk_receive_queue);
1149 if (skb != NULL)
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -07001150 amount = skb->tail - skb->transport_header;
Herbert Xue0f9f852005-06-18 22:56:18 -07001151 spin_unlock_bh(&sk->sk_receive_queue.lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152 return put_user(amount, (int __user *)arg);
1153 }
1154
1155 default:
1156 return -ENOIOCTLCMD;
1157 }
1158}
1159
1160static void rawv6_close(struct sock *sk, long timeout)
1161{
1162 if (inet_sk(sk)->num == IPPROTO_RAW)
1163 ip6_ra_control(sk, -1, NULL);
1164
1165 sk_common_release(sk);
1166}
1167
1168static int rawv6_init_sk(struct sock *sk)
1169{
Masahide NAKAMURAf48d5ff2007-02-07 00:07:39 -08001170 struct raw6_sock *rp = raw6_sk(sk);
1171
1172 switch (inet_sk(sk)->num) {
1173 case IPPROTO_ICMPV6:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174 rp->checksum = 1;
1175 rp->offset = 2;
Masahide NAKAMURAf48d5ff2007-02-07 00:07:39 -08001176 break;
1177 case IPPROTO_MH:
1178 rp->checksum = 1;
1179 rp->offset = 4;
1180 break;
1181 default:
1182 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183 }
1184 return(0);
1185}
1186
Eric Dumazetc5a432f2007-11-05 23:39:51 -08001187DEFINE_PROTO_INUSE(rawv6)
1188
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189struct proto rawv6_prot = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001190 .name = "RAWv6",
1191 .owner = THIS_MODULE,
1192 .close = rawv6_close,
1193 .connect = ip6_datagram_connect,
1194 .disconnect = udp_disconnect,
1195 .ioctl = rawv6_ioctl,
1196 .init = rawv6_init_sk,
1197 .destroy = inet6_destroy_sock,
1198 .setsockopt = rawv6_setsockopt,
1199 .getsockopt = rawv6_getsockopt,
1200 .sendmsg = rawv6_sendmsg,
1201 .recvmsg = rawv6_recvmsg,
1202 .bind = rawv6_bind,
1203 .backlog_rcv = rawv6_rcv_skb,
1204 .hash = raw_v6_hash,
1205 .unhash = raw_v6_unhash,
1206 .obj_size = sizeof(struct raw6_sock),
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001207#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001208 .compat_setsockopt = compat_rawv6_setsockopt,
1209 .compat_getsockopt = compat_rawv6_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001210#endif
Eric Dumazetc5a432f2007-11-05 23:39:51 -08001211 REF_PROTO_INUSE(rawv6)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212};
1213
1214#ifdef CONFIG_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1216{
1217 struct ipv6_pinfo *np = inet6_sk(sp);
1218 struct in6_addr *dest, *src;
1219 __u16 destp, srcp;
1220
1221 dest = &np->daddr;
1222 src = &np->rcv_saddr;
1223 destp = 0;
1224 srcp = inet_sk(sp)->num;
1225 seq_printf(seq,
1226 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
Wang Chena92aa312007-11-13 20:31:14 -08001227 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228 i,
1229 src->s6_addr32[0], src->s6_addr32[1],
1230 src->s6_addr32[2], src->s6_addr32[3], srcp,
1231 dest->s6_addr32[0], dest->s6_addr32[1],
1232 dest->s6_addr32[2], dest->s6_addr32[3], destp,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001233 sp->sk_state,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 atomic_read(&sp->sk_wmem_alloc),
1235 atomic_read(&sp->sk_rmem_alloc),
1236 0, 0L, 0,
1237 sock_i_uid(sp), 0,
1238 sock_i_ino(sp),
Wang Chena92aa312007-11-13 20:31:14 -08001239 atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240}
1241
1242static int raw6_seq_show(struct seq_file *seq, void *v)
1243{
1244 if (v == SEQ_START_TOKEN)
1245 seq_printf(seq,
1246 " sl "
1247 "local_address "
1248 "remote_address "
1249 "st tx_queue rx_queue tr tm->when retrnsmt"
Wang Chena92aa312007-11-13 20:31:14 -08001250 " uid timeout inode drops\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251 else
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001252 raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253 return 0;
1254}
1255
Philippe De Muyter56b3d972007-07-10 23:07:31 -07001256static const struct seq_operations raw6_seq_ops = {
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001257 .start = raw_seq_start,
1258 .next = raw_seq_next,
1259 .stop = raw_seq_stop,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260 .show = raw6_seq_show,
1261};
1262
1263static int raw6_seq_open(struct inode *inode, struct file *file)
1264{
Denis V. Lunev3046d762008-01-31 03:48:55 -08001265 return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266}
1267
Arjan van de Ven9a321442007-02-12 00:55:35 -08001268static const struct file_operations raw6_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269 .owner = THIS_MODULE,
1270 .open = raw6_seq_open,
1271 .read = seq_read,
1272 .llseek = seq_lseek,
Pavel Emelyanovf51d5992008-01-14 05:35:57 -08001273 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274};
1275
Pavel Emelyanova308da12008-01-14 05:36:50 -08001276static int raw6_init_net(struct net *net)
1277{
1278 if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops))
1279 return -ENOMEM;
1280
1281 return 0;
1282}
1283
1284static void raw6_exit_net(struct net *net)
1285{
1286 proc_net_remove(net, "raw6");
1287}
1288
1289static struct pernet_operations raw6_net_ops = {
1290 .init = raw6_init_net,
1291 .exit = raw6_exit_net,
1292};
1293
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294int __init raw6_proc_init(void)
1295{
Pavel Emelyanova308da12008-01-14 05:36:50 -08001296 return register_pernet_subsys(&raw6_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297}
1298
1299void raw6_proc_exit(void)
1300{
Pavel Emelyanova308da12008-01-14 05:36:50 -08001301 unregister_pernet_subsys(&raw6_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302}
1303#endif /* CONFIG_PROC_FS */
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001304
1305/* Same as inet6_dgram_ops, sans udp_poll. */
1306static const struct proto_ops inet6_sockraw_ops = {
1307 .family = PF_INET6,
1308 .owner = THIS_MODULE,
1309 .release = inet6_release,
1310 .bind = inet6_bind,
1311 .connect = inet_dgram_connect, /* ok */
1312 .socketpair = sock_no_socketpair, /* a do nothing */
1313 .accept = sock_no_accept, /* a do nothing */
1314 .getname = inet6_getname,
1315 .poll = datagram_poll, /* ok */
1316 .ioctl = inet6_ioctl, /* must change */
1317 .listen = sock_no_listen, /* ok */
1318 .shutdown = inet_shutdown, /* ok */
1319 .setsockopt = sock_common_setsockopt, /* ok */
1320 .getsockopt = sock_common_getsockopt, /* ok */
1321 .sendmsg = inet_sendmsg, /* ok */
1322 .recvmsg = sock_common_recvmsg, /* ok */
1323 .mmap = sock_no_mmap,
1324 .sendpage = sock_no_sendpage,
1325#ifdef CONFIG_COMPAT
1326 .compat_setsockopt = compat_sock_common_setsockopt,
1327 .compat_getsockopt = compat_sock_common_getsockopt,
1328#endif
1329};
1330
1331static struct inet_protosw rawv6_protosw = {
1332 .type = SOCK_RAW,
1333 .protocol = IPPROTO_IP, /* wild card */
1334 .prot = &rawv6_prot,
1335 .ops = &inet6_sockraw_ops,
1336 .capability = CAP_NET_RAW,
1337 .no_check = UDP_CSUM_DEFAULT,
1338 .flags = INET_PROTOSW_REUSE,
1339};
1340
1341int __init rawv6_init(void)
1342{
1343 int ret;
1344
1345 ret = inet6_register_protosw(&rawv6_protosw);
1346 if (ret)
1347 goto out;
1348out:
1349 return ret;
1350}
1351
Daniel Lezcano09f77092007-12-13 05:34:58 -08001352void rawv6_exit(void)
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001353{
1354 inet6_unregister_protosw(&rawv6_protosw);
1355}