blob: ae314f3fea46d0b98472d99b34eda7e45277ab7a [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 NAKAMURA59fbb3a62007-06-26 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
57#include <net/rawv6.h>
58#include <net/xfrm.h>
59
60#include <linux/proc_fs.h>
61#include <linux/seq_file.h>
62
63struct hlist_head raw_v6_htable[RAWV6_HTABLE_SIZE];
64DEFINE_RWLOCK(raw_v6_lock);
65
66static void raw_v6_hash(struct sock *sk)
67{
68 struct hlist_head *list = &raw_v6_htable[inet_sk(sk)->num &
69 (RAWV6_HTABLE_SIZE - 1)];
70
71 write_lock_bh(&raw_v6_lock);
72 sk_add_node(sk, list);
73 sock_prot_inc_use(sk->sk_prot);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +090074 write_unlock_bh(&raw_v6_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070075}
76
77static void raw_v6_unhash(struct sock *sk)
78{
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +090079 write_lock_bh(&raw_v6_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 if (sk_del_node_init(sk))
81 sock_prot_dec_use(sk->sk_prot);
82 write_unlock_bh(&raw_v6_lock);
83}
84
85
86/* Grumble... icmp and ip_input want to get at this... */
87struct sock *__raw_v6_lookup(struct sock *sk, unsigned short num,
Andrew McDonald0bd1b592005-08-09 19:44:42 -070088 struct in6_addr *loc_addr, struct in6_addr *rmt_addr,
89 int dif)
Linus Torvalds1da177e2005-04-16 15:20:36 -070090{
91 struct hlist_node *node;
92 int is_multicast = ipv6_addr_is_multicast(loc_addr);
93
94 sk_for_each_from(sk, node)
95 if (inet_sk(sk)->num == num) {
96 struct ipv6_pinfo *np = inet6_sk(sk);
97
98 if (!ipv6_addr_any(&np->daddr) &&
99 !ipv6_addr_equal(&np->daddr, rmt_addr))
100 continue;
101
Andrew McDonald0bd1b592005-08-09 19:44:42 -0700102 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
103 continue;
104
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 if (!ipv6_addr_any(&np->rcv_saddr)) {
106 if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
107 goto found;
108 if (is_multicast &&
109 inet6_mc_check(sk, loc_addr, rmt_addr))
110 goto found;
111 continue;
112 }
113 goto found;
114 }
115 sk = NULL;
116found:
117 return sk;
118}
119
120/*
121 * 0 - deliver
122 * 1 - block
123 */
124static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
125{
126 struct icmp6hdr *icmph;
127 struct raw6_sock *rp = raw6_sk(sk);
128
129 if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) {
130 __u32 *data = &rp->filter.data[0];
131 int bit_nr;
132
133 icmph = (struct icmp6hdr *) skb->data;
134 bit_nr = icmph->icmp6_type;
135
136 return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0;
137 }
138 return 0;
139}
140
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700141#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
142static int (*mh_filter)(struct sock *sock, struct sk_buff *skb);
143
144int rawv6_mh_filter_register(int (*filter)(struct sock *sock,
145 struct sk_buff *skb))
146{
147 rcu_assign_pointer(mh_filter, filter);
148 return 0;
149}
150EXPORT_SYMBOL(rawv6_mh_filter_register);
151
152int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock,
153 struct sk_buff *skb))
154{
155 rcu_assign_pointer(mh_filter, NULL);
156 synchronize_rcu();
157 return 0;
158}
159EXPORT_SYMBOL(rawv6_mh_filter_unregister);
160
161#endif
162
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163/*
164 * demultiplex raw sockets.
165 * (should consider queueing the skb in the sock receive_queue
166 * without calling rawv6.c)
167 *
168 * Caller owns SKB so we must make clones.
169 */
Patrick McHardyd13964f2005-08-09 19:45:02 -0700170int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171{
172 struct in6_addr *saddr;
173 struct in6_addr *daddr;
174 struct sock *sk;
Patrick McHardyd13964f2005-08-09 19:45:02 -0700175 int delivered = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 __u8 hash;
177
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700178 saddr = &ipv6_hdr(skb)->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 daddr = saddr + 1;
180
181 hash = nexthdr & (MAX_INET_PROTOS - 1);
182
183 read_lock(&raw_v6_lock);
184 sk = sk_head(&raw_v6_htable[hash]);
185
186 /*
187 * The first socket found will be delivered after
188 * delivery to transport protocols.
189 */
190
191 if (sk == NULL)
192 goto out;
193
YOSHIFUJI Hideaki2dac4b92005-09-01 17:44:49 -0700194 sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
196 while (sk) {
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700197 int filtered;
198
Patrick McHardyd13964f2005-08-09 19:45:02 -0700199 delivered = 1;
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700200 switch (nexthdr) {
201 case IPPROTO_ICMPV6:
202 filtered = icmpv6_filter(sk, skb);
203 break;
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700204
205#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700206 case IPPROTO_MH:
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700207 {
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700208 /* XXX: To validate MH only once for each packet,
209 * this is placed here. It should be after checking
210 * xfrm policy, however it doesn't. The checking xfrm
211 * policy is placed in rawv6_rcv() because it is
212 * required for each socket.
213 */
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700214 int (*filter)(struct sock *sock, struct sk_buff *skb);
215
216 filter = rcu_dereference(mh_filter);
217 filtered = filter ? filter(sk, skb) : 0;
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700218 break;
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700219 }
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700220#endif
221 default:
222 filtered = 0;
223 break;
224 }
225
226 if (filtered < 0)
227 break;
228 if (filtered == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
230
231 /* Not releasing hash table! */
Yasuyuki Kozakai9fb9cbb2005-11-09 16:38:16 -0800232 if (clone) {
233 nf_reset(clone);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 rawv6_rcv(sk, clone);
Yasuyuki Kozakai9fb9cbb2005-11-09 16:38:16 -0800235 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 }
Andrew McDonald0bd1b592005-08-09 19:44:42 -0700237 sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr,
YOSHIFUJI Hideaki2dac4b92005-09-01 17:44:49 -0700238 IP6CB(skb)->iif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 }
240out:
241 read_unlock(&raw_v6_lock);
Patrick McHardyd13964f2005-08-09 19:45:02 -0700242 return delivered;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243}
244
245/* This cleans up af_inet6 a bit. -DaveM */
246static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
247{
248 struct inet_sock *inet = inet_sk(sk);
249 struct ipv6_pinfo *np = inet6_sk(sk);
250 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
Al Viroe69a4ad2006-11-14 20:56:00 -0800251 __be32 v4addr = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 int addr_type;
253 int err;
254
255 if (addr_len < SIN6_LEN_RFC2133)
256 return -EINVAL;
257 addr_type = ipv6_addr_type(&addr->sin6_addr);
258
259 /* Raw sockets are IPv6 only */
260 if (addr_type == IPV6_ADDR_MAPPED)
261 return(-EADDRNOTAVAIL);
262
263 lock_sock(sk);
264
265 err = -EINVAL;
266 if (sk->sk_state != TCP_CLOSE)
267 goto out;
268
269 /* Check if the address belongs to the host. */
270 if (addr_type != IPV6_ADDR_ANY) {
271 struct net_device *dev = NULL;
272
273 if (addr_type & IPV6_ADDR_LINKLOCAL) {
274 if (addr_len >= sizeof(struct sockaddr_in6) &&
275 addr->sin6_scope_id) {
276 /* Override any existing binding, if another
277 * one is supplied by user.
278 */
279 sk->sk_bound_dev_if = addr->sin6_scope_id;
280 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900281
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 /* Binding to link-local address requires an interface */
283 if (!sk->sk_bound_dev_if)
284 goto out;
285
Eric W. Biederman881d9662007-09-17 11:56:21 -0700286 dev = dev_get_by_index(&init_net, sk->sk_bound_dev_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 if (!dev) {
288 err = -ENODEV;
289 goto out;
290 }
291 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900292
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 /* ipv4 addr of the socket is invalid. Only the
294 * unspecified and mapped address have a v4 equivalent.
295 */
296 v4addr = LOOPBACK4_IPV6;
297 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
298 err = -EADDRNOTAVAIL;
299 if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) {
300 if (dev)
301 dev_put(dev);
302 goto out;
303 }
304 }
305 if (dev)
306 dev_put(dev);
307 }
308
309 inet->rcv_saddr = inet->saddr = v4addr;
310 ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
311 if (!(addr_type & IPV6_ADDR_MULTICAST))
312 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
313 err = 0;
314out:
315 release_sock(sk);
316 return err;
317}
318
319void rawv6_err(struct sock *sk, struct sk_buff *skb,
320 struct inet6_skb_parm *opt,
Al Viro04ce6902006-11-08 00:21:01 -0800321 int type, int code, int offset, __be32 info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322{
323 struct inet_sock *inet = inet_sk(sk);
324 struct ipv6_pinfo *np = inet6_sk(sk);
325 int err;
326 int harderr;
327
328 /* Report error on raw socket, if:
329 1. User requested recverr.
330 2. Socket is connected (otherwise the error indication
331 is useless without recverr and error is hard.
332 */
333 if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
334 return;
335
336 harderr = icmpv6_err_convert(type, code, &err);
337 if (type == ICMPV6_PKT_TOOBIG)
338 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
339
340 if (np->recverr) {
341 u8 *payload = skb->data;
342 if (!inet->hdrincl)
343 payload += offset;
344 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
345 }
346
347 if (np->recverr || harderr) {
348 sk->sk_err = err;
349 sk->sk_error_report(sk);
350 }
351}
352
353static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
354{
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900355 if ((raw6_sk(sk)->checksum || sk->sk_filter) &&
Herbert Xufb286bb2005-11-10 13:01:24 -0800356 skb_checksum_complete(skb)) {
Wang Chena92aa312007-11-13 20:31:14 -0800357 atomic_inc(&sk->sk_drops);
Herbert Xufb286bb2005-11-10 13:01:24 -0800358 kfree_skb(skb);
359 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 }
361
362 /* Charge it to the socket. */
363 if (sock_queue_rcv_skb(sk,skb)<0) {
Wang Chena92aa312007-11-13 20:31:14 -0800364 atomic_inc(&sk->sk_drops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 kfree_skb(skb);
366 return 0;
367 }
368
369 return 0;
370}
371
372/*
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900373 * This is next to useless...
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 * if we demultiplex in network layer we don't need the extra call
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900375 * just to queue the skb...
376 * maybe we could have the network decide upon a hint if it
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 * should call raw_rcv for demultiplexing
378 */
379int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
380{
381 struct inet_sock *inet = inet_sk(sk);
382 struct raw6_sock *rp = raw6_sk(sk);
383
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900384 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
Wang Chena92aa312007-11-13 20:31:14 -0800385 atomic_inc(&sk->sk_drops);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900386 kfree_skb(skb);
387 return NET_RX_DROP;
388 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
390 if (!rp->checksum)
391 skb->ip_summed = CHECKSUM_UNNECESSARY;
392
Patrick McHardy84fa7932006-08-29 16:44:56 -0700393 if (skb->ip_summed == CHECKSUM_COMPLETE) {
Arnaldo Carvalho de Melod56f90a2007-04-10 20:50:43 -0700394 skb_postpull_rcsum(skb, skb_network_header(skb),
Arnaldo Carvalho de Melocfe1fc72007-03-16 17:26:39 -0300395 skb_network_header_len(skb));
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700396 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
397 &ipv6_hdr(skb)->daddr,
Herbert Xufb286bb2005-11-10 13:01:24 -0800398 skb->len, inet->num, skb->csum))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 skb->ip_summed = CHECKSUM_UNNECESSARY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 }
Herbert Xu60476372007-04-09 11:59:39 -0700401 if (!skb_csum_unnecessary(skb))
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700402 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
403 &ipv6_hdr(skb)->daddr,
404 skb->len,
405 inet->num, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
407 if (inet->hdrincl) {
Herbert Xufb286bb2005-11-10 13:01:24 -0800408 if (skb_checksum_complete(skb)) {
Wang Chena92aa312007-11-13 20:31:14 -0800409 atomic_inc(&sk->sk_drops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 kfree_skb(skb);
411 return 0;
412 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 }
414
415 rawv6_rcv_skb(sk, skb);
416 return 0;
417}
418
419
420/*
421 * This should be easy, if there is something there
422 * we return it, otherwise we block.
423 */
424
425static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
426 struct msghdr *msg, size_t len,
427 int noblock, int flags, int *addr_len)
428{
429 struct ipv6_pinfo *np = inet6_sk(sk);
430 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
431 struct sk_buff *skb;
432 size_t copied;
433 int err;
434
435 if (flags & MSG_OOB)
436 return -EOPNOTSUPP;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900437
438 if (addr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 *addr_len=sizeof(*sin6);
440
441 if (flags & MSG_ERRQUEUE)
442 return ipv6_recv_error(sk, msg, len);
443
444 skb = skb_recv_datagram(sk, flags, noblock, &err);
445 if (!skb)
446 goto out;
447
448 copied = skb->len;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900449 if (copied > len) {
450 copied = len;
451 msg->msg_flags |= MSG_TRUNC;
452 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453
Herbert Xu60476372007-04-09 11:59:39 -0700454 if (skb_csum_unnecessary(skb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
456 } else if (msg->msg_flags&MSG_TRUNC) {
Herbert Xufb286bb2005-11-10 13:01:24 -0800457 if (__skb_checksum_complete(skb))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 goto csum_copy_err;
459 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
460 } else {
461 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
462 if (err == -EINVAL)
463 goto csum_copy_err;
464 }
465 if (err)
466 goto out_free;
467
468 /* Copy the address. */
469 if (sin6) {
470 sin6->sin6_family = AF_INET6;
Tetsuo Handaf59fc7f2006-07-25 17:05:35 -0700471 sin6->sin6_port = 0;
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700472 ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 sin6->sin6_flowinfo = 0;
474 sin6->sin6_scope_id = 0;
475 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
476 sin6->sin6_scope_id = IP6CB(skb)->iif;
477 }
478
479 sock_recv_timestamp(msg, sk, skb);
480
481 if (np->rxopt.all)
482 datagram_recv_ctl(sk, msg, skb);
483
484 err = copied;
485 if (flags & MSG_TRUNC)
486 err = skb->len;
487
488out_free:
489 skb_free_datagram(sk, skb);
490out:
491 return err;
492
493csum_copy_err:
Herbert Xu3305b802005-12-13 23:16:37 -0800494 skb_kill_datagram(sk, skb, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495
496 /* Error for blocking case is chosen to masquerade
497 as some normal condition.
498 */
499 err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
Wang Chena92aa312007-11-13 20:31:14 -0800500 atomic_inc(&sk->sk_drops);
Herbert Xu3305b802005-12-13 23:16:37 -0800501 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502}
503
504static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
Herbert Xu357b40a2005-04-19 22:30:14 -0700505 struct raw6_sock *rp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506{
507 struct sk_buff *skb;
508 int err = 0;
Herbert Xu357b40a2005-04-19 22:30:14 -0700509 int offset;
510 int len;
Herbert Xu679a8732005-05-03 14:24:36 -0700511 int total_len;
Al Viro868c86b2006-11-14 21:35:48 -0800512 __wsum tmp_csum;
513 __sum16 csum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514
515 if (!rp->checksum)
516 goto send;
517
518 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
519 goto out;
520
Herbert Xu357b40a2005-04-19 22:30:14 -0700521 offset = rp->offset;
Arnaldo Carvalho de Melod56f90a2007-04-10 20:50:43 -0700522 total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) -
523 skb->data);
Herbert Xu679a8732005-05-03 14:24:36 -0700524 if (offset >= total_len - 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 err = -EINVAL;
Herbert Xu357b40a2005-04-19 22:30:14 -0700526 ip6_flush_pending_frames(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 goto out;
528 }
529
530 /* should be check HW csum miyazawa */
531 if (skb_queue_len(&sk->sk_write_queue) == 1) {
532 /*
533 * Only one fragment on the socket.
534 */
535 tmp_csum = skb->csum;
536 } else {
Herbert Xu357b40a2005-04-19 22:30:14 -0700537 struct sk_buff *csum_skb = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 tmp_csum = 0;
539
540 skb_queue_walk(&sk->sk_write_queue, skb) {
541 tmp_csum = csum_add(tmp_csum, skb->csum);
Herbert Xu357b40a2005-04-19 22:30:14 -0700542
543 if (csum_skb)
544 continue;
545
Arnaldo Carvalho de Meloea2ae172007-04-25 17:55:53 -0700546 len = skb->len - skb_transport_offset(skb);
Herbert Xu357b40a2005-04-19 22:30:14 -0700547 if (offset >= len) {
548 offset -= len;
549 continue;
550 }
551
552 csum_skb = skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 }
Herbert Xu357b40a2005-04-19 22:30:14 -0700554
555 skb = csum_skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 }
557
Arnaldo Carvalho de Meloea2ae172007-04-25 17:55:53 -0700558 offset += skb_transport_offset(skb);
Herbert Xu357b40a2005-04-19 22:30:14 -0700559 if (skb_copy_bits(skb, offset, &csum, 2))
560 BUG();
561
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 /* in case cksum was not initialized */
Herbert Xu357b40a2005-04-19 22:30:14 -0700563 if (unlikely(csum))
Al Viro5f92a732006-11-14 21:36:54 -0800564 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565
Al Viro868c86b2006-11-14 21:35:48 -0800566 csum = csum_ipv6_magic(&fl->fl6_src,
Herbert Xu357b40a2005-04-19 22:30:14 -0700567 &fl->fl6_dst,
Herbert Xu679a8732005-05-03 14:24:36 -0700568 total_len, fl->proto, tmp_csum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569
Al Virof6ab0282006-11-16 02:36:50 -0800570 if (csum == 0 && fl->proto == IPPROTO_UDP)
571 csum = CSUM_MANGLED_0;
Herbert Xu357b40a2005-04-19 22:30:14 -0700572
Herbert Xu357b40a2005-04-19 22:30:14 -0700573 if (skb_store_bits(skb, offset, &csum, 2))
574 BUG();
575
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576send:
577 err = ip6_push_pending_frames(sk);
578out:
579 return err;
580}
581
582static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900583 struct flowi *fl, struct rt6_info *rt,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 unsigned int flags)
585{
Herbert Xu3320da82005-04-19 22:32:22 -0700586 struct ipv6_pinfo *np = inet6_sk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 struct ipv6hdr *iph;
588 struct sk_buff *skb;
589 unsigned int hh_len;
590 int err;
591
592 if (length > rt->u.dst.dev->mtu) {
593 ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
594 return -EMSGSIZE;
595 }
596 if (flags&MSG_PROBE)
597 goto out;
598
599 hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
600
601 skb = sock_alloc_send_skb(sk, length+hh_len+15,
602 flags&MSG_DONTWAIT, &err);
603 if (skb == NULL)
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900604 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 skb_reserve(skb, hh_len);
606
607 skb->priority = sk->sk_priority;
608 skb->dst = dst_clone(&rt->u.dst);
609
Arnaldo Carvalho de Melo1ced98e2007-03-10 19:57:15 -0300610 skb_put(skb, length);
611 skb_reset_network_header(skb);
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700612 iph = ipv6_hdr(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613
614 skb->ip_summed = CHECKSUM_NONE;
615
Arnaldo Carvalho de Melob0e380b2007-04-10 21:21:55 -0700616 skb->transport_header = skb->network_header;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 err = memcpy_fromiovecend((void *)iph, from, 0, length);
618 if (err)
619 goto error_fault;
620
YOSHIFUJI Hideakia11d2062006-11-04 20:11:37 +0900621 IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
623 dst_output);
624 if (err > 0)
Herbert Xu3320da82005-04-19 22:32:22 -0700625 err = np->recverr ? net_xmit_errno(err) : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 if (err)
627 goto error;
628out:
629 return 0;
630
631error_fault:
632 err = -EFAULT;
633 kfree_skb(skb);
634error:
YOSHIFUJI Hideakia11d2062006-11-04 20:11:37 +0900635 IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900636 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637}
638
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800639static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640{
641 struct iovec *iov;
642 u8 __user *type = NULL;
643 u8 __user *code = NULL;
Masahide NAKAMURA6e8f4d42006-08-23 20:36:47 -0700644 u8 len = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 int probed = 0;
646 int i;
647
648 if (!msg->msg_iov)
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800649 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650
651 for (i = 0; i < msg->msg_iovlen; i++) {
652 iov = &msg->msg_iov[i];
653 if (!iov)
654 continue;
655
656 switch (fl->proto) {
657 case IPPROTO_ICMPV6:
658 /* check if one-byte field is readable or not. */
659 if (iov->iov_base && iov->iov_len < 1)
660 break;
661
662 if (!type) {
663 type = iov->iov_base;
664 /* check if code field is readable or not. */
665 if (iov->iov_len > 1)
666 code = type + 1;
667 } else if (!code)
668 code = iov->iov_base;
669
670 if (type && code) {
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800671 if (get_user(fl->fl_icmp_type, type) ||
672 get_user(fl->fl_icmp_code, code))
673 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 probed = 1;
675 }
676 break;
Masahide NAKAMURA6e8f4d42006-08-23 20:36:47 -0700677 case IPPROTO_MH:
678 if (iov->iov_base && iov->iov_len < 1)
679 break;
680 /* check if type field is readable or not. */
681 if (iov->iov_len > 2 - len) {
682 u8 __user *p = iov->iov_base;
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800683 if (get_user(fl->fl_mh_type, &p[2 - len]))
684 return -EFAULT;
Masahide NAKAMURA6e8f4d42006-08-23 20:36:47 -0700685 probed = 1;
686 } else
687 len += iov->iov_len;
688
689 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 default:
691 probed = 1;
692 break;
693 }
694 if (probed)
695 break;
696 }
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800697 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698}
699
700static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
701 struct msghdr *msg, size_t len)
702{
703 struct ipv6_txoptions opt_space;
704 struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
705 struct in6_addr *daddr, *final_p = NULL, final;
706 struct inet_sock *inet = inet_sk(sk);
707 struct ipv6_pinfo *np = inet6_sk(sk);
708 struct raw6_sock *rp = raw6_sk(sk);
709 struct ipv6_txoptions *opt = NULL;
710 struct ip6_flowlabel *flowlabel = NULL;
711 struct dst_entry *dst = NULL;
712 struct flowi fl;
713 int addr_len = msg->msg_namelen;
714 int hlimit = -1;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900715 int tclass = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 u16 proto;
717 int err;
718
719 /* Rough check on arithmetic overflow,
YOSHIFUJI Hideakib59e1392007-03-30 14:45:35 -0700720 better check is made in ip6_append_data().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 */
YOSHIFUJI Hideakib59e1392007-03-30 14:45:35 -0700722 if (len > INT_MAX)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 return -EMSGSIZE;
724
725 /* Mirror BSD error message compatibility */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900726 if (msg->msg_flags & MSG_OOB)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 return -EOPNOTSUPP;
728
729 /*
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900730 * Get and verify the address.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 */
732 memset(&fl, 0, sizeof(fl));
733
734 if (sin6) {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900735 if (addr_len < SIN6_LEN_RFC2133)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 return -EINVAL;
737
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900738 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 return(-EAFNOSUPPORT);
740
741 /* port is the proto value [0..255] carried in nexthdr */
742 proto = ntohs(sin6->sin6_port);
743
744 if (!proto)
745 proto = inet->num;
746 else if (proto != inet->num)
747 return(-EINVAL);
748
749 if (proto > 255)
750 return(-EINVAL);
751
752 daddr = &sin6->sin6_addr;
753 if (np->sndflow) {
754 fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
755 if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
756 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
757 if (flowlabel == NULL)
758 return -EINVAL;
759 daddr = &flowlabel->dst;
760 }
761 }
762
763 /*
764 * Otherwise it will be difficult to maintain
765 * sk->sk_dst_cache.
766 */
767 if (sk->sk_state == TCP_ESTABLISHED &&
768 ipv6_addr_equal(daddr, &np->daddr))
769 daddr = &np->daddr;
770
771 if (addr_len >= sizeof(struct sockaddr_in6) &&
772 sin6->sin6_scope_id &&
773 ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
774 fl.oif = sin6->sin6_scope_id;
775 } else {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900776 if (sk->sk_state != TCP_ESTABLISHED)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 return -EDESTADDRREQ;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900778
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 proto = inet->num;
780 daddr = &np->daddr;
781 fl.fl6_flowlabel = np->flow_label;
782 }
783
784 if (ipv6_addr_any(daddr)) {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900785 /*
786 * unspecified destination address
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 * treated as error... is this correct ?
788 */
789 fl6_sock_release(flowlabel);
790 return(-EINVAL);
791 }
792
793 if (fl.oif == 0)
794 fl.oif = sk->sk_bound_dev_if;
795
796 if (msg->msg_controllen) {
797 opt = &opt_space;
798 memset(opt, 0, sizeof(struct ipv6_txoptions));
799 opt->tot_len = sizeof(struct ipv6_txoptions);
800
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900801 err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 if (err < 0) {
803 fl6_sock_release(flowlabel);
804 return err;
805 }
806 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
807 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
808 if (flowlabel == NULL)
809 return -EINVAL;
810 }
811 if (!(opt->opt_nflen|opt->opt_flen))
812 opt = NULL;
813 }
814 if (opt == NULL)
815 opt = np->opt;
YOSHIFUJI Hideakidf9890c2005-11-20 12:23:18 +0900816 if (flowlabel)
817 opt = fl6_merge_options(&opt_space, flowlabel, opt);
818 opt = ipv6_fixup_options(&opt_space, opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819
820 fl.proto = proto;
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800821 err = rawv6_probe_proto_opt(&fl, msg);
822 if (err)
823 goto out;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900824
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 ipv6_addr_copy(&fl.fl6_dst, daddr);
826 if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
827 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
828
829 /* merge ip6_build_xmit from ip6_output */
830 if (opt && opt->srcrt) {
831 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
832 ipv6_addr_copy(&final, &fl.fl6_dst);
833 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
834 final_p = &final;
835 }
836
837 if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
838 fl.oif = np->mcast_oif;
Venkat Yekkiralabeb8d132006-08-04 23:12:42 -0700839 security_sk_classify_flow(sk, &fl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840
841 err = ip6_dst_lookup(sk, &dst, &fl);
842 if (err)
843 goto out;
844 if (final_p)
845 ipv6_addr_copy(&fl.fl6_dst, final_p);
846
David S. Miller14e50e52007-05-24 18:17:54 -0700847 if ((err = __xfrm_lookup(&dst, &fl, sk, 1)) < 0) {
848 if (err == -EREMOTE)
849 err = ip6_dst_blackhole(sk, &dst, &fl);
850 if (err < 0)
851 goto out;
852 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853
854 if (hlimit < 0) {
855 if (ipv6_addr_is_multicast(&fl.fl6_dst))
856 hlimit = np->mcast_hops;
857 else
858 hlimit = np->hop_limit;
859 if (hlimit < 0)
860 hlimit = dst_metric(dst, RTAX_HOPLIMIT);
861 if (hlimit < 0)
862 hlimit = ipv6_get_hoplimit(dst->dev);
863 }
864
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900865 if (tclass < 0) {
YOSHIFUJI Hideakie012d512006-09-13 20:01:28 -0700866 tclass = np->tclass;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900867 if (tclass < 0)
868 tclass = 0;
869 }
870
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 if (msg->msg_flags&MSG_CONFIRM)
872 goto do_confirm;
873
874back_from_confirm:
875 if (inet->hdrincl) {
876 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
877 } else {
878 lock_sock(sk);
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900879 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
880 len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
881 msg->msg_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882
883 if (err)
884 ip6_flush_pending_frames(sk);
885 else if (!(msg->msg_flags & MSG_MORE))
Herbert Xu357b40a2005-04-19 22:30:14 -0700886 err = rawv6_push_pending_frames(sk, &fl, rp);
YOSHIFUJI Hideaki3ef9d942007-09-14 16:45:40 -0700887 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 }
889done:
Nicolas DICHTEL6d3e85e2006-02-13 15:56:13 -0800890 dst_release(dst);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900891out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892 fl6_sock_release(flowlabel);
893 return err<0?err:len;
894do_confirm:
895 dst_confirm(dst);
896 if (!(msg->msg_flags & MSG_PROBE) || len)
897 goto back_from_confirm;
898 err = 0;
899 goto done;
900}
901
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900902static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903 char __user *optval, int optlen)
904{
905 switch (optname) {
906 case ICMPV6_FILTER:
907 if (optlen > sizeof(struct icmp6_filter))
908 optlen = sizeof(struct icmp6_filter);
909 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
910 return -EFAULT;
911 return 0;
912 default:
913 return -ENOPROTOOPT;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700914 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915
916 return 0;
917}
918
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900919static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 char __user *optval, int __user *optlen)
921{
922 int len;
923
924 switch (optname) {
925 case ICMPV6_FILTER:
926 if (get_user(len, optlen))
927 return -EFAULT;
928 if (len < 0)
929 return -EINVAL;
930 if (len > sizeof(struct icmp6_filter))
931 len = sizeof(struct icmp6_filter);
932 if (put_user(len, optlen))
933 return -EFAULT;
934 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
935 return -EFAULT;
936 return 0;
937 default:
938 return -ENOPROTOOPT;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700939 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940
941 return 0;
942}
943
944
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800945static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946 char __user *optval, int optlen)
947{
948 struct raw6_sock *rp = raw6_sk(sk);
949 int val;
950
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900951 if (get_user(val, (int __user *)optval))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952 return -EFAULT;
953
954 switch (optname) {
955 case IPV6_CHECKSUM:
956 /* You may get strange result with a positive odd offset;
957 RFC2292bis agrees with me. */
958 if (val > 0 && (val&1))
959 return(-EINVAL);
960 if (val < 0) {
961 rp->checksum = 0;
962 } else {
963 rp->checksum = 1;
964 rp->offset = val;
965 }
966
967 return 0;
968 break;
969
970 default:
971 return(-ENOPROTOOPT);
972 }
973}
974
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800975static int rawv6_setsockopt(struct sock *sk, int level, int optname,
976 char __user *optval, int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978 switch(level) {
979 case SOL_RAW:
980 break;
981
982 case SOL_ICMPV6:
983 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
984 return -EOPNOTSUPP;
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800985 return rawv6_seticmpfilter(sk, level, optname, optval,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986 optlen);
987 case SOL_IPV6:
988 if (optname == IPV6_CHECKSUM)
989 break;
990 default:
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800991 return ipv6_setsockopt(sk, level, optname, optval,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700993 }
994
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800995 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
996}
997
998#ifdef CONFIG_COMPAT
999static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001000 char __user *optval, int optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001001{
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001002 switch (level) {
1003 case SOL_RAW:
1004 break;
1005 case SOL_ICMPV6:
1006 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1007 return -EOPNOTSUPP;
1008 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1009 case SOL_IPV6:
1010 if (optname == IPV6_CHECKSUM)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001011 break;
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001012 default:
1013 return compat_ipv6_setsockopt(sk, level, optname,
1014 optval, optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001015 }
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001016 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1017}
1018#endif
1019
1020static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1021 char __user *optval, int __user *optlen)
1022{
1023 struct raw6_sock *rp = raw6_sk(sk);
1024 int val, len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025
1026 if (get_user(len,optlen))
1027 return -EFAULT;
1028
1029 switch (optname) {
1030 case IPV6_CHECKSUM:
1031 if (rp->checksum == 0)
1032 val = -1;
1033 else
1034 val = rp->offset;
1035 break;
1036
1037 default:
1038 return -ENOPROTOOPT;
1039 }
1040
1041 len = min_t(unsigned int, sizeof(int), len);
1042
1043 if (put_user(len, optlen))
1044 return -EFAULT;
1045 if (copy_to_user(optval,&val,len))
1046 return -EFAULT;
1047 return 0;
1048}
1049
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001050static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1051 char __user *optval, int __user *optlen)
1052{
1053 switch(level) {
1054 case SOL_RAW:
1055 break;
1056
1057 case SOL_ICMPV6:
1058 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1059 return -EOPNOTSUPP;
1060 return rawv6_geticmpfilter(sk, level, optname, optval,
1061 optlen);
1062 case SOL_IPV6:
1063 if (optname == IPV6_CHECKSUM)
1064 break;
1065 default:
1066 return ipv6_getsockopt(sk, level, optname, optval,
1067 optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001068 }
1069
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001070 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1071}
1072
1073#ifdef CONFIG_COMPAT
1074static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001075 char __user *optval, int __user *optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001076{
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001077 switch (level) {
1078 case SOL_RAW:
1079 break;
1080 case SOL_ICMPV6:
1081 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1082 return -EOPNOTSUPP;
1083 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1084 case SOL_IPV6:
1085 if (optname == IPV6_CHECKSUM)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001086 break;
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001087 default:
1088 return compat_ipv6_getsockopt(sk, level, optname,
1089 optval, optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001090 }
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001091 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1092}
1093#endif
1094
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1096{
1097 switch(cmd) {
1098 case SIOCOUTQ:
1099 {
1100 int amount = atomic_read(&sk->sk_wmem_alloc);
1101 return put_user(amount, (int __user *)arg);
1102 }
1103 case SIOCINQ:
1104 {
1105 struct sk_buff *skb;
1106 int amount = 0;
1107
Herbert Xue0f9f852005-06-18 22:56:18 -07001108 spin_lock_bh(&sk->sk_receive_queue.lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 skb = skb_peek(&sk->sk_receive_queue);
1110 if (skb != NULL)
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -07001111 amount = skb->tail - skb->transport_header;
Herbert Xue0f9f852005-06-18 22:56:18 -07001112 spin_unlock_bh(&sk->sk_receive_queue.lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 return put_user(amount, (int __user *)arg);
1114 }
1115
1116 default:
1117 return -ENOIOCTLCMD;
1118 }
1119}
1120
1121static void rawv6_close(struct sock *sk, long timeout)
1122{
1123 if (inet_sk(sk)->num == IPPROTO_RAW)
1124 ip6_ra_control(sk, -1, NULL);
1125
1126 sk_common_release(sk);
1127}
1128
1129static int rawv6_init_sk(struct sock *sk)
1130{
Masahide NAKAMURAf48d5ff2007-02-07 00:07:39 -08001131 struct raw6_sock *rp = raw6_sk(sk);
1132
1133 switch (inet_sk(sk)->num) {
1134 case IPPROTO_ICMPV6:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135 rp->checksum = 1;
1136 rp->offset = 2;
Masahide NAKAMURAf48d5ff2007-02-07 00:07:39 -08001137 break;
1138 case IPPROTO_MH:
1139 rp->checksum = 1;
1140 rp->offset = 4;
1141 break;
1142 default:
1143 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 }
1145 return(0);
1146}
1147
Eric Dumazetc5a432f2007-11-05 23:39:51 -08001148DEFINE_PROTO_INUSE(rawv6)
1149
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150struct proto rawv6_prot = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001151 .name = "RAWv6",
1152 .owner = THIS_MODULE,
1153 .close = rawv6_close,
1154 .connect = ip6_datagram_connect,
1155 .disconnect = udp_disconnect,
1156 .ioctl = rawv6_ioctl,
1157 .init = rawv6_init_sk,
1158 .destroy = inet6_destroy_sock,
1159 .setsockopt = rawv6_setsockopt,
1160 .getsockopt = rawv6_getsockopt,
1161 .sendmsg = rawv6_sendmsg,
1162 .recvmsg = rawv6_recvmsg,
1163 .bind = rawv6_bind,
1164 .backlog_rcv = rawv6_rcv_skb,
1165 .hash = raw_v6_hash,
1166 .unhash = raw_v6_unhash,
1167 .obj_size = sizeof(struct raw6_sock),
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001168#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001169 .compat_setsockopt = compat_rawv6_setsockopt,
1170 .compat_getsockopt = compat_rawv6_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001171#endif
Eric Dumazetc5a432f2007-11-05 23:39:51 -08001172 REF_PROTO_INUSE(rawv6)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173};
1174
1175#ifdef CONFIG_PROC_FS
1176struct raw6_iter_state {
1177 int bucket;
1178};
1179
1180#define raw6_seq_private(seq) ((struct raw6_iter_state *)(seq)->private)
1181
1182static struct sock *raw6_get_first(struct seq_file *seq)
1183{
1184 struct sock *sk;
1185 struct hlist_node *node;
1186 struct raw6_iter_state* state = raw6_seq_private(seq);
1187
1188 for (state->bucket = 0; state->bucket < RAWV6_HTABLE_SIZE; ++state->bucket)
1189 sk_for_each(sk, node, &raw_v6_htable[state->bucket])
1190 if (sk->sk_family == PF_INET6)
1191 goto out;
1192 sk = NULL;
1193out:
1194 return sk;
1195}
1196
1197static struct sock *raw6_get_next(struct seq_file *seq, struct sock *sk)
1198{
1199 struct raw6_iter_state* state = raw6_seq_private(seq);
1200
1201 do {
1202 sk = sk_next(sk);
1203try_again:
1204 ;
1205 } while (sk && sk->sk_family != PF_INET6);
1206
1207 if (!sk && ++state->bucket < RAWV6_HTABLE_SIZE) {
1208 sk = sk_head(&raw_v6_htable[state->bucket]);
1209 goto try_again;
1210 }
1211 return sk;
1212}
1213
1214static struct sock *raw6_get_idx(struct seq_file *seq, loff_t pos)
1215{
1216 struct sock *sk = raw6_get_first(seq);
1217 if (sk)
1218 while (pos && (sk = raw6_get_next(seq, sk)) != NULL)
1219 --pos;
1220 return pos ? NULL : sk;
1221}
1222
1223static void *raw6_seq_start(struct seq_file *seq, loff_t *pos)
1224{
1225 read_lock(&raw_v6_lock);
1226 return *pos ? raw6_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
1227}
1228
1229static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1230{
1231 struct sock *sk;
1232
1233 if (v == SEQ_START_TOKEN)
1234 sk = raw6_get_first(seq);
1235 else
1236 sk = raw6_get_next(seq, v);
1237 ++*pos;
1238 return sk;
1239}
1240
1241static void raw6_seq_stop(struct seq_file *seq, void *v)
1242{
1243 read_unlock(&raw_v6_lock);
1244}
1245
1246static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1247{
1248 struct ipv6_pinfo *np = inet6_sk(sp);
1249 struct in6_addr *dest, *src;
1250 __u16 destp, srcp;
1251
1252 dest = &np->daddr;
1253 src = &np->rcv_saddr;
1254 destp = 0;
1255 srcp = inet_sk(sp)->num;
1256 seq_printf(seq,
1257 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
Wang Chena92aa312007-11-13 20:31:14 -08001258 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259 i,
1260 src->s6_addr32[0], src->s6_addr32[1],
1261 src->s6_addr32[2], src->s6_addr32[3], srcp,
1262 dest->s6_addr32[0], dest->s6_addr32[1],
1263 dest->s6_addr32[2], dest->s6_addr32[3], destp,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001264 sp->sk_state,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265 atomic_read(&sp->sk_wmem_alloc),
1266 atomic_read(&sp->sk_rmem_alloc),
1267 0, 0L, 0,
1268 sock_i_uid(sp), 0,
1269 sock_i_ino(sp),
Wang Chena92aa312007-11-13 20:31:14 -08001270 atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271}
1272
1273static int raw6_seq_show(struct seq_file *seq, void *v)
1274{
1275 if (v == SEQ_START_TOKEN)
1276 seq_printf(seq,
1277 " sl "
1278 "local_address "
1279 "remote_address "
1280 "st tx_queue rx_queue tr tm->when retrnsmt"
Wang Chena92aa312007-11-13 20:31:14 -08001281 " uid timeout inode drops\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 else
1283 raw6_sock_seq_show(seq, v, raw6_seq_private(seq)->bucket);
1284 return 0;
1285}
1286
Philippe De Muyter56b3d972007-07-10 23:07:31 -07001287static const struct seq_operations raw6_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 .start = raw6_seq_start,
1289 .next = raw6_seq_next,
1290 .stop = raw6_seq_stop,
1291 .show = raw6_seq_show,
1292};
1293
1294static int raw6_seq_open(struct inode *inode, struct file *file)
1295{
Pavel Emelyanovcf7732e2007-10-10 02:29:29 -07001296 return seq_open_private(file, &raw6_seq_ops,
1297 sizeof(struct raw6_iter_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298}
1299
Arjan van de Ven9a321442007-02-12 00:55:35 -08001300static const struct file_operations raw6_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 .owner = THIS_MODULE,
1302 .open = raw6_seq_open,
1303 .read = seq_read,
1304 .llseek = seq_lseek,
1305 .release = seq_release_private,
1306};
1307
1308int __init raw6_proc_init(void)
1309{
Eric W. Biederman457c4cb2007-09-12 12:01:34 +02001310 if (!proc_net_fops_create(&init_net, "raw6", S_IRUGO, &raw6_seq_fops))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311 return -ENOMEM;
1312 return 0;
1313}
1314
1315void raw6_proc_exit(void)
1316{
Eric W. Biederman457c4cb2007-09-12 12:01:34 +02001317 proc_net_remove(&init_net, "raw6");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318}
1319#endif /* CONFIG_PROC_FS */