blob: ca24ef19cd8f294c35d7d285751a5bb55c5d1838 [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 Viroe69a4adc2006-11-14 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)) {
357 /* FIXME: increment a raw6 drops counter here */
358 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) {
364 /* FIXME: increment a raw6 drops counter here */
365 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)) {
385 kfree_skb(skb);
386 return NET_RX_DROP;
387 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388
389 if (!rp->checksum)
390 skb->ip_summed = CHECKSUM_UNNECESSARY;
391
Patrick McHardy84fa7932006-08-29 16:44:56 -0700392 if (skb->ip_summed == CHECKSUM_COMPLETE) {
Arnaldo Carvalho de Melod56f90a2007-04-10 20:50:43 -0700393 skb_postpull_rcsum(skb, skb_network_header(skb),
Arnaldo Carvalho de Melocfe1fc72007-03-16 17:26:39 -0300394 skb_network_header_len(skb));
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700395 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
396 &ipv6_hdr(skb)->daddr,
Herbert Xufb286bb2005-11-10 13:01:24 -0800397 skb->len, inet->num, skb->csum))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 skb->ip_summed = CHECKSUM_UNNECESSARY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 }
Herbert Xu60476372007-04-09 11:59:39 -0700400 if (!skb_csum_unnecessary(skb))
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700401 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
402 &ipv6_hdr(skb)->daddr,
403 skb->len,
404 inet->num, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405
406 if (inet->hdrincl) {
Herbert Xufb286bb2005-11-10 13:01:24 -0800407 if (skb_checksum_complete(skb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 /* FIXME: increment a raw6 drops counter here */
409 kfree_skb(skb);
410 return 0;
411 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 }
413
414 rawv6_rcv_skb(sk, skb);
415 return 0;
416}
417
418
419/*
420 * This should be easy, if there is something there
421 * we return it, otherwise we block.
422 */
423
424static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
425 struct msghdr *msg, size_t len,
426 int noblock, int flags, int *addr_len)
427{
428 struct ipv6_pinfo *np = inet6_sk(sk);
429 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
430 struct sk_buff *skb;
431 size_t copied;
432 int err;
433
434 if (flags & MSG_OOB)
435 return -EOPNOTSUPP;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900436
437 if (addr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 *addr_len=sizeof(*sin6);
439
440 if (flags & MSG_ERRQUEUE)
441 return ipv6_recv_error(sk, msg, len);
442
443 skb = skb_recv_datagram(sk, flags, noblock, &err);
444 if (!skb)
445 goto out;
446
447 copied = skb->len;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900448 if (copied > len) {
449 copied = len;
450 msg->msg_flags |= MSG_TRUNC;
451 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452
Herbert Xu60476372007-04-09 11:59:39 -0700453 if (skb_csum_unnecessary(skb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
455 } else if (msg->msg_flags&MSG_TRUNC) {
Herbert Xufb286bb2005-11-10 13:01:24 -0800456 if (__skb_checksum_complete(skb))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 goto csum_copy_err;
458 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
459 } else {
460 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
461 if (err == -EINVAL)
462 goto csum_copy_err;
463 }
464 if (err)
465 goto out_free;
466
467 /* Copy the address. */
468 if (sin6) {
469 sin6->sin6_family = AF_INET6;
Tetsuo Handaf59fc7f2006-07-25 17:05:35 -0700470 sin6->sin6_port = 0;
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700471 ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 sin6->sin6_flowinfo = 0;
473 sin6->sin6_scope_id = 0;
474 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
475 sin6->sin6_scope_id = IP6CB(skb)->iif;
476 }
477
478 sock_recv_timestamp(msg, sk, skb);
479
480 if (np->rxopt.all)
481 datagram_recv_ctl(sk, msg, skb);
482
483 err = copied;
484 if (flags & MSG_TRUNC)
485 err = skb->len;
486
487out_free:
488 skb_free_datagram(sk, skb);
489out:
490 return err;
491
492csum_copy_err:
Herbert Xu3305b802005-12-13 23:16:37 -0800493 skb_kill_datagram(sk, skb, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494
495 /* Error for blocking case is chosen to masquerade
496 as some normal condition.
497 */
498 err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
499 /* FIXME: increment a raw6 drops counter here */
Herbert Xu3305b802005-12-13 23:16:37 -0800500 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501}
502
503static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
Herbert Xu357b40a2005-04-19 22:30:14 -0700504 struct raw6_sock *rp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505{
506 struct sk_buff *skb;
507 int err = 0;
Herbert Xu357b40a2005-04-19 22:30:14 -0700508 int offset;
509 int len;
Herbert Xu679a8732005-05-03 14:24:36 -0700510 int total_len;
Al Viro868c86b2006-11-14 21:35:48 -0800511 __wsum tmp_csum;
512 __sum16 csum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
514 if (!rp->checksum)
515 goto send;
516
517 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
518 goto out;
519
Herbert Xu357b40a2005-04-19 22:30:14 -0700520 offset = rp->offset;
Arnaldo Carvalho de Melod56f90a2007-04-10 20:50:43 -0700521 total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) -
522 skb->data);
Herbert Xu679a8732005-05-03 14:24:36 -0700523 if (offset >= total_len - 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 err = -EINVAL;
Herbert Xu357b40a2005-04-19 22:30:14 -0700525 ip6_flush_pending_frames(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 goto out;
527 }
528
529 /* should be check HW csum miyazawa */
530 if (skb_queue_len(&sk->sk_write_queue) == 1) {
531 /*
532 * Only one fragment on the socket.
533 */
534 tmp_csum = skb->csum;
535 } else {
Herbert Xu357b40a2005-04-19 22:30:14 -0700536 struct sk_buff *csum_skb = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 tmp_csum = 0;
538
539 skb_queue_walk(&sk->sk_write_queue, skb) {
540 tmp_csum = csum_add(tmp_csum, skb->csum);
Herbert Xu357b40a2005-04-19 22:30:14 -0700541
542 if (csum_skb)
543 continue;
544
Arnaldo Carvalho de Meloea2ae172007-04-25 17:55:53 -0700545 len = skb->len - skb_transport_offset(skb);
Herbert Xu357b40a2005-04-19 22:30:14 -0700546 if (offset >= len) {
547 offset -= len;
548 continue;
549 }
550
551 csum_skb = skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 }
Herbert Xu357b40a2005-04-19 22:30:14 -0700553
554 skb = csum_skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 }
556
Arnaldo Carvalho de Meloea2ae172007-04-25 17:55:53 -0700557 offset += skb_transport_offset(skb);
Herbert Xu357b40a2005-04-19 22:30:14 -0700558 if (skb_copy_bits(skb, offset, &csum, 2))
559 BUG();
560
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 /* in case cksum was not initialized */
Herbert Xu357b40a2005-04-19 22:30:14 -0700562 if (unlikely(csum))
Al Viro5f92a732006-11-14 21:36:54 -0800563 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564
Al Viro868c86b2006-11-14 21:35:48 -0800565 csum = csum_ipv6_magic(&fl->fl6_src,
Herbert Xu357b40a2005-04-19 22:30:14 -0700566 &fl->fl6_dst,
Herbert Xu679a8732005-05-03 14:24:36 -0700567 total_len, fl->proto, tmp_csum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568
Al Virof6ab0282006-11-16 02:36:50 -0800569 if (csum == 0 && fl->proto == IPPROTO_UDP)
570 csum = CSUM_MANGLED_0;
Herbert Xu357b40a2005-04-19 22:30:14 -0700571
Herbert Xu357b40a2005-04-19 22:30:14 -0700572 if (skb_store_bits(skb, offset, &csum, 2))
573 BUG();
574
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575send:
576 err = ip6_push_pending_frames(sk);
577out:
578 return err;
579}
580
581static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900582 struct flowi *fl, struct rt6_info *rt,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 unsigned int flags)
584{
Herbert Xu3320da82005-04-19 22:32:22 -0700585 struct ipv6_pinfo *np = inet6_sk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 struct ipv6hdr *iph;
587 struct sk_buff *skb;
588 unsigned int hh_len;
589 int err;
590
591 if (length > rt->u.dst.dev->mtu) {
592 ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
593 return -EMSGSIZE;
594 }
595 if (flags&MSG_PROBE)
596 goto out;
597
598 hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
599
600 skb = sock_alloc_send_skb(sk, length+hh_len+15,
601 flags&MSG_DONTWAIT, &err);
602 if (skb == NULL)
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900603 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 skb_reserve(skb, hh_len);
605
606 skb->priority = sk->sk_priority;
607 skb->dst = dst_clone(&rt->u.dst);
608
Arnaldo Carvalho de Melo1ced98e2007-03-10 19:57:15 -0300609 skb_put(skb, length);
610 skb_reset_network_header(skb);
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700611 iph = ipv6_hdr(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612
613 skb->ip_summed = CHECKSUM_NONE;
614
Arnaldo Carvalho de Melob0e380b2007-04-10 21:21:55 -0700615 skb->transport_header = skb->network_header;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 err = memcpy_fromiovecend((void *)iph, from, 0, length);
617 if (err)
618 goto error_fault;
619
YOSHIFUJI Hideakia11d2062006-11-04 20:11:37 +0900620 IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
622 dst_output);
623 if (err > 0)
Herbert Xu3320da82005-04-19 22:32:22 -0700624 err = np->recverr ? net_xmit_errno(err) : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 if (err)
626 goto error;
627out:
628 return 0;
629
630error_fault:
631 err = -EFAULT;
632 kfree_skb(skb);
633error:
YOSHIFUJI Hideakia11d2062006-11-04 20:11:37 +0900634 IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900635 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636}
637
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800638static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639{
640 struct iovec *iov;
641 u8 __user *type = NULL;
642 u8 __user *code = NULL;
Masahide NAKAMURA6e8f4d42006-08-23 20:36:47 -0700643 u8 len = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 int probed = 0;
645 int i;
646
647 if (!msg->msg_iov)
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800648 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649
650 for (i = 0; i < msg->msg_iovlen; i++) {
651 iov = &msg->msg_iov[i];
652 if (!iov)
653 continue;
654
655 switch (fl->proto) {
656 case IPPROTO_ICMPV6:
657 /* check if one-byte field is readable or not. */
658 if (iov->iov_base && iov->iov_len < 1)
659 break;
660
661 if (!type) {
662 type = iov->iov_base;
663 /* check if code field is readable or not. */
664 if (iov->iov_len > 1)
665 code = type + 1;
666 } else if (!code)
667 code = iov->iov_base;
668
669 if (type && code) {
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800670 if (get_user(fl->fl_icmp_type, type) ||
671 get_user(fl->fl_icmp_code, code))
672 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 probed = 1;
674 }
675 break;
Masahide NAKAMURA6e8f4d42006-08-23 20:36:47 -0700676 case IPPROTO_MH:
677 if (iov->iov_base && iov->iov_len < 1)
678 break;
679 /* check if type field is readable or not. */
680 if (iov->iov_len > 2 - len) {
681 u8 __user *p = iov->iov_base;
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800682 if (get_user(fl->fl_mh_type, &p[2 - len]))
683 return -EFAULT;
Masahide NAKAMURA6e8f4d42006-08-23 20:36:47 -0700684 probed = 1;
685 } else
686 len += iov->iov_len;
687
688 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 default:
690 probed = 1;
691 break;
692 }
693 if (probed)
694 break;
695 }
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800696 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697}
698
699static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
700 struct msghdr *msg, size_t len)
701{
702 struct ipv6_txoptions opt_space;
703 struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
704 struct in6_addr *daddr, *final_p = NULL, final;
705 struct inet_sock *inet = inet_sk(sk);
706 struct ipv6_pinfo *np = inet6_sk(sk);
707 struct raw6_sock *rp = raw6_sk(sk);
708 struct ipv6_txoptions *opt = NULL;
709 struct ip6_flowlabel *flowlabel = NULL;
710 struct dst_entry *dst = NULL;
711 struct flowi fl;
712 int addr_len = msg->msg_namelen;
713 int hlimit = -1;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900714 int tclass = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 u16 proto;
716 int err;
717
718 /* Rough check on arithmetic overflow,
YOSHIFUJI Hideakib59e1392007-03-30 14:45:35 -0700719 better check is made in ip6_append_data().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 */
YOSHIFUJI Hideakib59e1392007-03-30 14:45:35 -0700721 if (len > INT_MAX)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 return -EMSGSIZE;
723
724 /* Mirror BSD error message compatibility */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900725 if (msg->msg_flags & MSG_OOB)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 return -EOPNOTSUPP;
727
728 /*
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900729 * Get and verify the address.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730 */
731 memset(&fl, 0, sizeof(fl));
732
733 if (sin6) {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900734 if (addr_len < SIN6_LEN_RFC2133)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 return -EINVAL;
736
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900737 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 return(-EAFNOSUPPORT);
739
740 /* port is the proto value [0..255] carried in nexthdr */
741 proto = ntohs(sin6->sin6_port);
742
743 if (!proto)
744 proto = inet->num;
745 else if (proto != inet->num)
746 return(-EINVAL);
747
748 if (proto > 255)
749 return(-EINVAL);
750
751 daddr = &sin6->sin6_addr;
752 if (np->sndflow) {
753 fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
754 if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
755 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
756 if (flowlabel == NULL)
757 return -EINVAL;
758 daddr = &flowlabel->dst;
759 }
760 }
761
762 /*
763 * Otherwise it will be difficult to maintain
764 * sk->sk_dst_cache.
765 */
766 if (sk->sk_state == TCP_ESTABLISHED &&
767 ipv6_addr_equal(daddr, &np->daddr))
768 daddr = &np->daddr;
769
770 if (addr_len >= sizeof(struct sockaddr_in6) &&
771 sin6->sin6_scope_id &&
772 ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
773 fl.oif = sin6->sin6_scope_id;
774 } else {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900775 if (sk->sk_state != TCP_ESTABLISHED)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 return -EDESTADDRREQ;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900777
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 proto = inet->num;
779 daddr = &np->daddr;
780 fl.fl6_flowlabel = np->flow_label;
781 }
782
783 if (ipv6_addr_any(daddr)) {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900784 /*
785 * unspecified destination address
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 * treated as error... is this correct ?
787 */
788 fl6_sock_release(flowlabel);
789 return(-EINVAL);
790 }
791
792 if (fl.oif == 0)
793 fl.oif = sk->sk_bound_dev_if;
794
795 if (msg->msg_controllen) {
796 opt = &opt_space;
797 memset(opt, 0, sizeof(struct ipv6_txoptions));
798 opt->tot_len = sizeof(struct ipv6_txoptions);
799
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900800 err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 if (err < 0) {
802 fl6_sock_release(flowlabel);
803 return err;
804 }
805 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
806 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
807 if (flowlabel == NULL)
808 return -EINVAL;
809 }
810 if (!(opt->opt_nflen|opt->opt_flen))
811 opt = NULL;
812 }
813 if (opt == NULL)
814 opt = np->opt;
YOSHIFUJI Hideakidf9890c2005-11-20 12:23:18 +0900815 if (flowlabel)
816 opt = fl6_merge_options(&opt_space, flowlabel, opt);
817 opt = ipv6_fixup_options(&opt_space, opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818
819 fl.proto = proto;
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800820 err = rawv6_probe_proto_opt(&fl, msg);
821 if (err)
822 goto out;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900823
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 ipv6_addr_copy(&fl.fl6_dst, daddr);
825 if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
826 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
827
828 /* merge ip6_build_xmit from ip6_output */
829 if (opt && opt->srcrt) {
830 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
831 ipv6_addr_copy(&final, &fl.fl6_dst);
832 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
833 final_p = &final;
834 }
835
836 if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
837 fl.oif = np->mcast_oif;
Venkat Yekkiralabeb8d132006-08-04 23:12:42 -0700838 security_sk_classify_flow(sk, &fl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839
840 err = ip6_dst_lookup(sk, &dst, &fl);
841 if (err)
842 goto out;
843 if (final_p)
844 ipv6_addr_copy(&fl.fl6_dst, final_p);
845
David S. Miller14e50e52007-05-24 18:17:54 -0700846 if ((err = __xfrm_lookup(&dst, &fl, sk, 1)) < 0) {
847 if (err == -EREMOTE)
848 err = ip6_dst_blackhole(sk, &dst, &fl);
849 if (err < 0)
850 goto out;
851 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852
853 if (hlimit < 0) {
854 if (ipv6_addr_is_multicast(&fl.fl6_dst))
855 hlimit = np->mcast_hops;
856 else
857 hlimit = np->hop_limit;
858 if (hlimit < 0)
859 hlimit = dst_metric(dst, RTAX_HOPLIMIT);
860 if (hlimit < 0)
861 hlimit = ipv6_get_hoplimit(dst->dev);
862 }
863
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900864 if (tclass < 0) {
YOSHIFUJI Hideakie012d512006-09-13 20:01:28 -0700865 tclass = np->tclass;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900866 if (tclass < 0)
867 tclass = 0;
868 }
869
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 if (msg->msg_flags&MSG_CONFIRM)
871 goto do_confirm;
872
873back_from_confirm:
874 if (inet->hdrincl) {
875 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
876 } else {
877 lock_sock(sk);
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900878 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
879 len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
880 msg->msg_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881
882 if (err)
883 ip6_flush_pending_frames(sk);
884 else if (!(msg->msg_flags & MSG_MORE))
Herbert Xu357b40a2005-04-19 22:30:14 -0700885 err = rawv6_push_pending_frames(sk, &fl, rp);
YOSHIFUJI Hideaki3ef9d942007-09-14 16:45:40 -0700886 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 }
888done:
Nicolas DICHTEL6d3e85e2006-02-13 15:56:13 -0800889 dst_release(dst);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900890out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 fl6_sock_release(flowlabel);
892 return err<0?err:len;
893do_confirm:
894 dst_confirm(dst);
895 if (!(msg->msg_flags & MSG_PROBE) || len)
896 goto back_from_confirm;
897 err = 0;
898 goto done;
899}
900
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900901static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902 char __user *optval, int optlen)
903{
904 switch (optname) {
905 case ICMPV6_FILTER:
906 if (optlen > sizeof(struct icmp6_filter))
907 optlen = sizeof(struct icmp6_filter);
908 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
909 return -EFAULT;
910 return 0;
911 default:
912 return -ENOPROTOOPT;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700913 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914
915 return 0;
916}
917
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900918static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 char __user *optval, int __user *optlen)
920{
921 int len;
922
923 switch (optname) {
924 case ICMPV6_FILTER:
925 if (get_user(len, optlen))
926 return -EFAULT;
927 if (len < 0)
928 return -EINVAL;
929 if (len > sizeof(struct icmp6_filter))
930 len = sizeof(struct icmp6_filter);
931 if (put_user(len, optlen))
932 return -EFAULT;
933 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
934 return -EFAULT;
935 return 0;
936 default:
937 return -ENOPROTOOPT;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700938 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939
940 return 0;
941}
942
943
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800944static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 char __user *optval, int optlen)
946{
947 struct raw6_sock *rp = raw6_sk(sk);
948 int val;
949
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900950 if (get_user(val, (int __user *)optval))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 return -EFAULT;
952
953 switch (optname) {
954 case IPV6_CHECKSUM:
955 /* You may get strange result with a positive odd offset;
956 RFC2292bis agrees with me. */
957 if (val > 0 && (val&1))
958 return(-EINVAL);
959 if (val < 0) {
960 rp->checksum = 0;
961 } else {
962 rp->checksum = 1;
963 rp->offset = val;
964 }
965
966 return 0;
967 break;
968
969 default:
970 return(-ENOPROTOOPT);
971 }
972}
973
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800974static int rawv6_setsockopt(struct sock *sk, int level, int optname,
975 char __user *optval, int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977 switch(level) {
978 case SOL_RAW:
979 break;
980
981 case SOL_ICMPV6:
982 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
983 return -EOPNOTSUPP;
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800984 return rawv6_seticmpfilter(sk, level, optname, optval,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 optlen);
986 case SOL_IPV6:
987 if (optname == IPV6_CHECKSUM)
988 break;
989 default:
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800990 return ipv6_setsockopt(sk, level, optname, optval,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700992 }
993
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800994 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
995}
996
997#ifdef CONFIG_COMPAT
998static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800999 char __user *optval, int optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001000{
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001001 switch (level) {
1002 case SOL_RAW:
1003 break;
1004 case SOL_ICMPV6:
1005 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1006 return -EOPNOTSUPP;
1007 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1008 case SOL_IPV6:
1009 if (optname == IPV6_CHECKSUM)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001010 break;
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001011 default:
1012 return compat_ipv6_setsockopt(sk, level, optname,
1013 optval, optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001014 }
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001015 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1016}
1017#endif
1018
1019static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1020 char __user *optval, int __user *optlen)
1021{
1022 struct raw6_sock *rp = raw6_sk(sk);
1023 int val, len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024
1025 if (get_user(len,optlen))
1026 return -EFAULT;
1027
1028 switch (optname) {
1029 case IPV6_CHECKSUM:
1030 if (rp->checksum == 0)
1031 val = -1;
1032 else
1033 val = rp->offset;
1034 break;
1035
1036 default:
1037 return -ENOPROTOOPT;
1038 }
1039
1040 len = min_t(unsigned int, sizeof(int), len);
1041
1042 if (put_user(len, optlen))
1043 return -EFAULT;
1044 if (copy_to_user(optval,&val,len))
1045 return -EFAULT;
1046 return 0;
1047}
1048
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001049static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1050 char __user *optval, int __user *optlen)
1051{
1052 switch(level) {
1053 case SOL_RAW:
1054 break;
1055
1056 case SOL_ICMPV6:
1057 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1058 return -EOPNOTSUPP;
1059 return rawv6_geticmpfilter(sk, level, optname, optval,
1060 optlen);
1061 case SOL_IPV6:
1062 if (optname == IPV6_CHECKSUM)
1063 break;
1064 default:
1065 return ipv6_getsockopt(sk, level, optname, optval,
1066 optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001067 }
1068
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001069 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1070}
1071
1072#ifdef CONFIG_COMPAT
1073static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001074 char __user *optval, int __user *optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001075{
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001076 switch (level) {
1077 case SOL_RAW:
1078 break;
1079 case SOL_ICMPV6:
1080 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1081 return -EOPNOTSUPP;
1082 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1083 case SOL_IPV6:
1084 if (optname == IPV6_CHECKSUM)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001085 break;
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001086 default:
1087 return compat_ipv6_getsockopt(sk, level, optname,
1088 optval, optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001089 }
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001090 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1091}
1092#endif
1093
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1095{
1096 switch(cmd) {
1097 case SIOCOUTQ:
1098 {
1099 int amount = atomic_read(&sk->sk_wmem_alloc);
1100 return put_user(amount, (int __user *)arg);
1101 }
1102 case SIOCINQ:
1103 {
1104 struct sk_buff *skb;
1105 int amount = 0;
1106
Herbert Xue0f9f852005-06-18 22:56:18 -07001107 spin_lock_bh(&sk->sk_receive_queue.lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 skb = skb_peek(&sk->sk_receive_queue);
1109 if (skb != NULL)
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -07001110 amount = skb->tail - skb->transport_header;
Herbert Xue0f9f852005-06-18 22:56:18 -07001111 spin_unlock_bh(&sk->sk_receive_queue.lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 return put_user(amount, (int __user *)arg);
1113 }
1114
1115 default:
1116 return -ENOIOCTLCMD;
1117 }
1118}
1119
1120static void rawv6_close(struct sock *sk, long timeout)
1121{
1122 if (inet_sk(sk)->num == IPPROTO_RAW)
1123 ip6_ra_control(sk, -1, NULL);
1124
1125 sk_common_release(sk);
1126}
1127
1128static int rawv6_init_sk(struct sock *sk)
1129{
Masahide NAKAMURAf48d5ff2007-02-07 00:07:39 -08001130 struct raw6_sock *rp = raw6_sk(sk);
1131
1132 switch (inet_sk(sk)->num) {
1133 case IPPROTO_ICMPV6:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 rp->checksum = 1;
1135 rp->offset = 2;
Masahide NAKAMURAf48d5ff2007-02-07 00:07:39 -08001136 break;
1137 case IPPROTO_MH:
1138 rp->checksum = 1;
1139 rp->offset = 4;
1140 break;
1141 default:
1142 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143 }
1144 return(0);
1145}
1146
1147struct proto rawv6_prot = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001148 .name = "RAWv6",
1149 .owner = THIS_MODULE,
1150 .close = rawv6_close,
1151 .connect = ip6_datagram_connect,
1152 .disconnect = udp_disconnect,
1153 .ioctl = rawv6_ioctl,
1154 .init = rawv6_init_sk,
1155 .destroy = inet6_destroy_sock,
1156 .setsockopt = rawv6_setsockopt,
1157 .getsockopt = rawv6_getsockopt,
1158 .sendmsg = rawv6_sendmsg,
1159 .recvmsg = rawv6_recvmsg,
1160 .bind = rawv6_bind,
1161 .backlog_rcv = rawv6_rcv_skb,
1162 .hash = raw_v6_hash,
1163 .unhash = raw_v6_unhash,
1164 .obj_size = sizeof(struct raw6_sock),
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001165#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001166 .compat_setsockopt = compat_rawv6_setsockopt,
1167 .compat_getsockopt = compat_rawv6_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001168#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169};
1170
1171#ifdef CONFIG_PROC_FS
1172struct raw6_iter_state {
1173 int bucket;
1174};
1175
1176#define raw6_seq_private(seq) ((struct raw6_iter_state *)(seq)->private)
1177
1178static struct sock *raw6_get_first(struct seq_file *seq)
1179{
1180 struct sock *sk;
1181 struct hlist_node *node;
1182 struct raw6_iter_state* state = raw6_seq_private(seq);
1183
1184 for (state->bucket = 0; state->bucket < RAWV6_HTABLE_SIZE; ++state->bucket)
1185 sk_for_each(sk, node, &raw_v6_htable[state->bucket])
1186 if (sk->sk_family == PF_INET6)
1187 goto out;
1188 sk = NULL;
1189out:
1190 return sk;
1191}
1192
1193static struct sock *raw6_get_next(struct seq_file *seq, struct sock *sk)
1194{
1195 struct raw6_iter_state* state = raw6_seq_private(seq);
1196
1197 do {
1198 sk = sk_next(sk);
1199try_again:
1200 ;
1201 } while (sk && sk->sk_family != PF_INET6);
1202
1203 if (!sk && ++state->bucket < RAWV6_HTABLE_SIZE) {
1204 sk = sk_head(&raw_v6_htable[state->bucket]);
1205 goto try_again;
1206 }
1207 return sk;
1208}
1209
1210static struct sock *raw6_get_idx(struct seq_file *seq, loff_t pos)
1211{
1212 struct sock *sk = raw6_get_first(seq);
1213 if (sk)
1214 while (pos && (sk = raw6_get_next(seq, sk)) != NULL)
1215 --pos;
1216 return pos ? NULL : sk;
1217}
1218
1219static void *raw6_seq_start(struct seq_file *seq, loff_t *pos)
1220{
1221 read_lock(&raw_v6_lock);
1222 return *pos ? raw6_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
1223}
1224
1225static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1226{
1227 struct sock *sk;
1228
1229 if (v == SEQ_START_TOKEN)
1230 sk = raw6_get_first(seq);
1231 else
1232 sk = raw6_get_next(seq, v);
1233 ++*pos;
1234 return sk;
1235}
1236
1237static void raw6_seq_stop(struct seq_file *seq, void *v)
1238{
1239 read_unlock(&raw_v6_lock);
1240}
1241
1242static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1243{
1244 struct ipv6_pinfo *np = inet6_sk(sp);
1245 struct in6_addr *dest, *src;
1246 __u16 destp, srcp;
1247
1248 dest = &np->daddr;
1249 src = &np->rcv_saddr;
1250 destp = 0;
1251 srcp = inet_sk(sp)->num;
1252 seq_printf(seq,
1253 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1254 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n",
1255 i,
1256 src->s6_addr32[0], src->s6_addr32[1],
1257 src->s6_addr32[2], src->s6_addr32[3], srcp,
1258 dest->s6_addr32[0], dest->s6_addr32[1],
1259 dest->s6_addr32[2], dest->s6_addr32[3], destp,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001260 sp->sk_state,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261 atomic_read(&sp->sk_wmem_alloc),
1262 atomic_read(&sp->sk_rmem_alloc),
1263 0, 0L, 0,
1264 sock_i_uid(sp), 0,
1265 sock_i_ino(sp),
1266 atomic_read(&sp->sk_refcnt), sp);
1267}
1268
1269static int raw6_seq_show(struct seq_file *seq, void *v)
1270{
1271 if (v == SEQ_START_TOKEN)
1272 seq_printf(seq,
1273 " sl "
1274 "local_address "
1275 "remote_address "
1276 "st tx_queue rx_queue tr tm->when retrnsmt"
1277 " uid timeout inode\n");
1278 else
1279 raw6_sock_seq_show(seq, v, raw6_seq_private(seq)->bucket);
1280 return 0;
1281}
1282
Philippe De Muyter56b3d972007-07-10 23:07:31 -07001283static const struct seq_operations raw6_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284 .start = raw6_seq_start,
1285 .next = raw6_seq_next,
1286 .stop = raw6_seq_stop,
1287 .show = raw6_seq_show,
1288};
1289
1290static int raw6_seq_open(struct inode *inode, struct file *file)
1291{
Pavel Emelyanovcf7732e2007-10-10 02:29:29 -07001292 return seq_open_private(file, &raw6_seq_ops,
1293 sizeof(struct raw6_iter_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294}
1295
Arjan van de Ven9a321442007-02-12 00:55:35 -08001296static const struct file_operations raw6_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297 .owner = THIS_MODULE,
1298 .open = raw6_seq_open,
1299 .read = seq_read,
1300 .llseek = seq_lseek,
1301 .release = seq_release_private,
1302};
1303
1304int __init raw6_proc_init(void)
1305{
Eric W. Biederman457c4cb2007-09-12 12:01:34 +02001306 if (!proc_net_fops_create(&init_net, "raw6", S_IRUGO, &raw6_seq_fops))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307 return -ENOMEM;
1308 return 0;
1309}
1310
1311void raw6_proc_exit(void)
1312{
Eric W. Biederman457c4cb2007-09-12 12:01:34 +02001313 proc_net_remove(&init_net, "raw6");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314}
1315#endif /* CONFIG_PROC_FS */