blob: 330b5e7b7df6f705f1bcf2c66880b1e3de374df3 [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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * Fixes:
11 * Hideaki YOSHIFUJI : sin6_scope_id support
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +090012 * YOSHIFUJI,H.@USAGI : raw checksum (RFC2292(bis) compliance)
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version.
19 */
20
21#include <linux/errno.h>
22#include <linux/types.h>
23#include <linux/socket.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090024#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/sockios.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <linux/net.h>
27#include <linux/in6.h>
28#include <linux/netdevice.h>
29#include <linux/if_arp.h>
30#include <linux/icmpv6.h>
31#include <linux/netfilter.h>
32#include <linux/netfilter_ipv6.h>
Herbert Xu3305b802005-12-13 23:16:37 -080033#include <linux/skbuff.h>
David S. Millere2d57762011-02-03 17:59:32 -080034#include <linux/compat.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>
Amerigo Wang07a93622012-10-29 16:23:10 +000053#if IS_ENABLED(CONFIG_IPV6_MIP6)
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -070054#include <net/mip6.h>
55#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090056#include <linux/mroute6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -080058#include <net/raw.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070059#include <net/rawv6.h>
60#include <net/xfrm.h>
61
62#include <linux/proc_fs.h>
63#include <linux/seq_file.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040064#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -080066static struct raw_hashinfo raw_v6_hashinfo = {
Robert P. J. Day938b93a2008-03-18 00:59:23 -070067 .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -080068};
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
Pavel Emelyanovbe185882008-01-14 05:35:31 -080070static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
Eric Dumazetb71d1d42011-04-22 04:53:02 +000071 unsigned short num, const struct in6_addr *loc_addr,
72 const struct in6_addr *rmt_addr, int dif)
Linus Torvalds1da177e2005-04-16 15:20:36 -070073{
Eric Dumazeta50feda2012-05-18 18:57:34 +000074 bool is_multicast = ipv6_addr_is_multicast(loc_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
Sasha Levinb67bfe02013-02-27 17:06:00 -080076 sk_for_each_from(sk)
Eric Dumazetc720c7e2009-10-15 06:30:45 +000077 if (inet_sk(sk)->inet_num == num) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 struct ipv6_pinfo *np = inet6_sk(sk);
79
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +090080 if (!net_eq(sock_net(sk), net))
Pavel Emelyanovbe185882008-01-14 05:35:31 -080081 continue;
82
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 if (!ipv6_addr_any(&np->daddr) &&
84 !ipv6_addr_equal(&np->daddr, rmt_addr))
85 continue;
86
Andrew McDonald0bd1b592005-08-09 19:44:42 -070087 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
88 continue;
89
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 if (!ipv6_addr_any(&np->rcv_saddr)) {
91 if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
92 goto found;
93 if (is_multicast &&
94 inet6_mc_check(sk, loc_addr, rmt_addr))
95 goto found;
96 continue;
97 }
98 goto found;
99 }
100 sk = NULL;
101found:
102 return sk;
103}
104
105/*
106 * 0 - deliver
107 * 1 - block
108 */
Eric Dumazet1b05c4b2012-09-25 07:03:40 +0000109static int icmpv6_filter(const struct sock *sk, const struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110{
Eric Dumazet1b05c4b2012-09-25 07:03:40 +0000111 struct icmp6hdr *_hdr;
112 const struct icmp6hdr *hdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
Eric Dumazet1b05c4b2012-09-25 07:03:40 +0000114 hdr = skb_header_pointer(skb, skb_transport_offset(skb),
115 sizeof(_hdr), &_hdr);
116 if (hdr) {
117 const __u32 *data = &raw6_sk(sk)->filter.data[0];
118 unsigned int type = hdr->icmp6_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119
Eric Dumazet1b05c4b2012-09-25 07:03:40 +0000120 return (data[type >> 5] & (1U << (type & 31))) != 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 }
Eric Dumazet1b05c4b2012-09-25 07:03:40 +0000122 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123}
124
Amerigo Wang07a93622012-10-29 16:23:10 +0000125#if IS_ENABLED(CONFIG_IPV6_MIP6)
Eric Dumazetf2eda472011-01-20 07:37:53 +0000126typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb);
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700127
Eric Dumazetf2eda472011-01-20 07:37:53 +0000128static mh_filter_t __rcu *mh_filter __read_mostly;
129
130int rawv6_mh_filter_register(mh_filter_t filter)
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700131{
Eric Dumazetcf778b02012-01-12 04:41:32 +0000132 rcu_assign_pointer(mh_filter, filter);
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700133 return 0;
134}
135EXPORT_SYMBOL(rawv6_mh_filter_register);
136
Eric Dumazetf2eda472011-01-20 07:37:53 +0000137int rawv6_mh_filter_unregister(mh_filter_t filter)
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700138{
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +0000139 RCU_INIT_POINTER(mh_filter, NULL);
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700140 synchronize_rcu();
141 return 0;
142}
143EXPORT_SYMBOL(rawv6_mh_filter_unregister);
144
145#endif
146
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147/*
148 * demultiplex raw sockets.
149 * (should consider queueing the skb in the sock receive_queue
150 * without calling rawv6.c)
151 *
152 * Caller owns SKB so we must make clones.
153 */
Eric Dumazeta50feda2012-05-18 18:57:34 +0000154static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155{
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000156 const struct in6_addr *saddr;
157 const struct in6_addr *daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 struct sock *sk;
Eric Dumazeta50feda2012-05-18 18:57:34 +0000159 bool delivered = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 __u8 hash;
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800161 struct net *net;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700163 saddr = &ipv6_hdr(skb)->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 daddr = saddr + 1;
165
David S. Millerf9242b62012-06-19 18:56:21 -0700166 hash = nexthdr & (RAW_HTABLE_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800168 read_lock(&raw_v6_hashinfo.lock);
169 sk = sk_head(&raw_v6_hashinfo.ht[hash]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 if (sk == NULL)
172 goto out;
173
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900174 net = dev_net(skb->dev);
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800175 sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176
177 while (sk) {
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700178 int filtered;
179
Eric Dumazeta50feda2012-05-18 18:57:34 +0000180 delivered = true;
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700181 switch (nexthdr) {
182 case IPPROTO_ICMPV6:
183 filtered = icmpv6_filter(sk, skb);
184 break;
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700185
Amerigo Wang07a93622012-10-29 16:23:10 +0000186#if IS_ENABLED(CONFIG_IPV6_MIP6)
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700187 case IPPROTO_MH:
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700188 {
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700189 /* XXX: To validate MH only once for each packet,
190 * this is placed here. It should be after checking
191 * xfrm policy, however it doesn't. The checking xfrm
192 * policy is placed in rawv6_rcv() because it is
193 * required for each socket.
194 */
Eric Dumazetf2eda472011-01-20 07:37:53 +0000195 mh_filter_t *filter;
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700196
197 filter = rcu_dereference(mh_filter);
Eric Dumazetf2eda472011-01-20 07:37:53 +0000198 filtered = filter ? (*filter)(sk, skb) : 0;
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700199 break;
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700200 }
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700201#endif
202 default:
203 filtered = 0;
204 break;
205 }
206
207 if (filtered < 0)
208 break;
209 if (filtered == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
211
212 /* Not releasing hash table! */
Yasuyuki Kozakai9fb9cbb2005-11-09 16:38:16 -0800213 if (clone) {
214 nf_reset(clone);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 rawv6_rcv(sk, clone);
Yasuyuki Kozakai9fb9cbb2005-11-09 16:38:16 -0800216 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 }
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800218 sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
YOSHIFUJI Hideaki2dac4b92005-09-01 17:44:49 -0700219 IP6CB(skb)->iif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 }
221out:
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800222 read_unlock(&raw_v6_hashinfo.lock);
Patrick McHardyd13964f2005-08-09 19:45:02 -0700223 return delivered;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224}
225
Eric Dumazeta50feda2012-05-18 18:57:34 +0000226bool raw6_local_deliver(struct sk_buff *skb, int nexthdr)
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800227{
228 struct sock *raw_sk;
229
David S. Millerf9242b62012-06-19 18:56:21 -0700230 raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (RAW_HTABLE_SIZE - 1)]);
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800231 if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
232 raw_sk = NULL;
233
234 return raw_sk != NULL;
235}
236
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237/* This cleans up af_inet6 a bit. -DaveM */
238static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
239{
240 struct inet_sock *inet = inet_sk(sk);
241 struct ipv6_pinfo *np = inet6_sk(sk);
242 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
Al Viroe69a4ad2006-11-14 20:56:00 -0800243 __be32 v4addr = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 int addr_type;
245 int err;
246
247 if (addr_len < SIN6_LEN_RFC2133)
248 return -EINVAL;
249 addr_type = ipv6_addr_type(&addr->sin6_addr);
250
251 /* Raw sockets are IPv6 only */
252 if (addr_type == IPV6_ADDR_MAPPED)
Eric Dumazetfd5c0022009-11-06 07:01:17 +0000253 return -EADDRNOTAVAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254
255 lock_sock(sk);
256
257 err = -EINVAL;
258 if (sk->sk_state != TCP_CLOSE)
259 goto out;
260
Eric Dumazetfd5c0022009-11-06 07:01:17 +0000261 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 /* Check if the address belongs to the host. */
263 if (addr_type != IPV6_ADDR_ANY) {
264 struct net_device *dev = NULL;
265
266 if (addr_type & IPV6_ADDR_LINKLOCAL) {
267 if (addr_len >= sizeof(struct sockaddr_in6) &&
268 addr->sin6_scope_id) {
269 /* Override any existing binding, if another
270 * one is supplied by user.
271 */
272 sk->sk_bound_dev_if = addr->sin6_scope_id;
273 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900274
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 /* Binding to link-local address requires an interface */
276 if (!sk->sk_bound_dev_if)
Eric Dumazetfd5c0022009-11-06 07:01:17 +0000277 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278
Eric Dumazetfd5c0022009-11-06 07:01:17 +0000279 err = -ENODEV;
280 dev = dev_get_by_index_rcu(sock_net(sk),
281 sk->sk_bound_dev_if);
282 if (!dev)
283 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900285
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 /* ipv4 addr of the socket is invalid. Only the
287 * unspecified and mapped address have a v4 equivalent.
288 */
289 v4addr = LOOPBACK4_IPV6;
290 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
291 err = -EADDRNOTAVAIL;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900292 if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
Daniel Lezcanobfeade02008-01-10 22:43:18 -0800293 dev, 0)) {
Eric Dumazetfd5c0022009-11-06 07:01:17 +0000294 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 }
296 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 }
298
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000299 inet->inet_rcv_saddr = inet->inet_saddr = v4addr;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000300 np->rcv_saddr = addr->sin6_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 if (!(addr_type & IPV6_ADDR_MULTICAST))
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000302 np->saddr = addr->sin6_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 err = 0;
Eric Dumazetfd5c0022009-11-06 07:01:17 +0000304out_unlock:
305 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306out:
307 release_sock(sk);
308 return err;
309}
310
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800311static void rawv6_err(struct sock *sk, struct sk_buff *skb,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 struct inet6_skb_parm *opt,
Brian Haleyd5fdd6b2009-06-23 04:31:07 -0700313 u8 type, u8 code, int offset, __be32 info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314{
315 struct inet_sock *inet = inet_sk(sk);
316 struct ipv6_pinfo *np = inet6_sk(sk);
317 int err;
318 int harderr;
319
320 /* Report error on raw socket, if:
321 1. User requested recverr.
322 2. Socket is connected (otherwise the error indication
323 is useless without recverr and error is hard.
324 */
325 if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
326 return;
327
328 harderr = icmpv6_err_convert(type, code, &err);
David S. Miller81aded22012-06-15 14:54:11 -0700329 if (type == ICMPV6_PKT_TOOBIG) {
330 ip6_sk_update_pmtu(skb, sk, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
David S. Miller81aded22012-06-15 14:54:11 -0700332 }
David S. Millerec18d9a2012-07-12 00:25:15 -0700333 if (type == NDISC_REDIRECT)
334 ip6_sk_redirect(skb, sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 if (np->recverr) {
336 u8 *payload = skb->data;
337 if (!inet->hdrincl)
338 payload += offset;
339 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
340 }
341
342 if (np->recverr || harderr) {
343 sk->sk_err = err;
344 sk->sk_error_report(sk);
345 }
346}
347
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800348void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
Brian Haleyd5fdd6b2009-06-23 04:31:07 -0700349 u8 type, u8 code, int inner_offset, __be32 info)
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800350{
351 struct sock *sk;
352 int hash;
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000353 const struct in6_addr *saddr, *daddr;
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800354 struct net *net;
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800355
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800356 hash = nexthdr & (RAW_HTABLE_SIZE - 1);
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800357
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800358 read_lock(&raw_v6_hashinfo.lock);
359 sk = sk_head(&raw_v6_hashinfo.ht[hash]);
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800360 if (sk != NULL) {
YOSHIFUJI Hideaki05f175c2008-04-11 23:51:26 +0900361 /* Note: ipv6_hdr(skb) != skb->data */
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000362 const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data;
YOSHIFUJI Hideaki05f175c2008-04-11 23:51:26 +0900363 saddr = &ip6h->saddr;
364 daddr = &ip6h->daddr;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900365 net = dev_net(skb->dev);
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800366
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800367 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800368 IP6CB(skb)->iif))) {
369 rawv6_err(sk, skb, NULL, type, code,
370 inner_offset, info);
371 sk = sk_next(sk);
372 }
373 }
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800374 read_unlock(&raw_v6_hashinfo.lock);
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800375}
376
Eric Dumazet33d480c2011-08-11 19:30:52 +0000377static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378{
Eric Dumazet33d480c2011-08-11 19:30:52 +0000379 if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) &&
Herbert Xufb286bb2005-11-10 13:01:24 -0800380 skb_checksum_complete(skb)) {
Wang Chena92aa312007-11-13 20:31:14 -0800381 atomic_inc(&sk->sk_drops);
Herbert Xufb286bb2005-11-10 13:01:24 -0800382 kfree_skb(skb);
Yang Hongyang3cc76ca2008-08-29 14:06:51 -0700383 return NET_RX_DROP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 }
385
386 /* Charge it to the socket. */
Eric Dumazetd826eb12011-11-09 07:24:35 +0000387 skb_dst_drop(skb);
388 if (sock_queue_rcv_skb(sk, skb) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 kfree_skb(skb);
Yang Hongyang3cc76ca2008-08-29 14:06:51 -0700390 return NET_RX_DROP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 }
392
393 return 0;
394}
395
396/*
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900397 * This is next to useless...
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 * if we demultiplex in network layer we don't need the extra call
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900399 * just to queue the skb...
400 * maybe we could have the network decide upon a hint if it
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 * should call raw_rcv for demultiplexing
402 */
403int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
404{
405 struct inet_sock *inet = inet_sk(sk);
406 struct raw6_sock *rp = raw6_sk(sk);
407
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900408 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
Wang Chena92aa312007-11-13 20:31:14 -0800409 atomic_inc(&sk->sk_drops);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900410 kfree_skb(skb);
411 return NET_RX_DROP;
412 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413
414 if (!rp->checksum)
415 skb->ip_summed = CHECKSUM_UNNECESSARY;
416
Patrick McHardy84fa7932006-08-29 16:44:56 -0700417 if (skb->ip_summed == CHECKSUM_COMPLETE) {
Arnaldo Carvalho de Melod56f90a2007-04-10 20:50:43 -0700418 skb_postpull_rcsum(skb, skb_network_header(skb),
Arnaldo Carvalho de Melocfe1fc72007-03-16 17:26:39 -0300419 skb_network_header_len(skb));
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700420 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
421 &ipv6_hdr(skb)->daddr,
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000422 skb->len, inet->inet_num, skb->csum))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 skb->ip_summed = CHECKSUM_UNNECESSARY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 }
Herbert Xu60476372007-04-09 11:59:39 -0700425 if (!skb_csum_unnecessary(skb))
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700426 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
427 &ipv6_hdr(skb)->daddr,
428 skb->len,
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000429 inet->inet_num, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
431 if (inet->hdrincl) {
Herbert Xufb286bb2005-11-10 13:01:24 -0800432 if (skb_checksum_complete(skb)) {
Wang Chena92aa312007-11-13 20:31:14 -0800433 atomic_inc(&sk->sk_drops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 kfree_skb(skb);
Yang Hongyang3cc76ca2008-08-29 14:06:51 -0700435 return NET_RX_DROP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 }
438
439 rawv6_rcv_skb(sk, skb);
440 return 0;
441}
442
443
444/*
445 * This should be easy, if there is something there
446 * we return it, otherwise we block.
447 */
448
449static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
450 struct msghdr *msg, size_t len,
451 int noblock, int flags, int *addr_len)
452{
453 struct ipv6_pinfo *np = inet6_sk(sk);
454 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
455 struct sk_buff *skb;
456 size_t copied;
457 int err;
458
459 if (flags & MSG_OOB)
460 return -EOPNOTSUPP;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900461
462 if (addr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 *addr_len=sizeof(*sin6);
464
465 if (flags & MSG_ERRQUEUE)
466 return ipv6_recv_error(sk, msg, len);
467
Brian Haley4b340ae2010-04-23 11:26:09 +0000468 if (np->rxpmtu && np->rxopt.bits.rxpmtu)
469 return ipv6_recv_rxpmtu(sk, msg, len);
470
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 skb = skb_recv_datagram(sk, flags, noblock, &err);
472 if (!skb)
473 goto out;
474
475 copied = skb->len;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900476 if (copied > len) {
477 copied = len;
478 msg->msg_flags |= MSG_TRUNC;
479 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
Herbert Xu60476372007-04-09 11:59:39 -0700481 if (skb_csum_unnecessary(skb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
483 } else if (msg->msg_flags&MSG_TRUNC) {
Herbert Xufb286bb2005-11-10 13:01:24 -0800484 if (__skb_checksum_complete(skb))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 goto csum_copy_err;
486 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
487 } else {
488 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
489 if (err == -EINVAL)
490 goto csum_copy_err;
491 }
492 if (err)
493 goto out_free;
494
495 /* Copy the address. */
496 if (sin6) {
497 sin6->sin6_family = AF_INET6;
Tetsuo Handaf59fc7f2006-07-25 17:05:35 -0700498 sin6->sin6_port = 0;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000499 sin6->sin6_addr = ipv6_hdr(skb)->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 sin6->sin6_flowinfo = 0;
501 sin6->sin6_scope_id = 0;
502 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
503 sin6->sin6_scope_id = IP6CB(skb)->iif;
504 }
505
Neil Horman3b885782009-10-12 13:26:31 -0700506 sock_recv_ts_and_drops(msg, sk, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507
508 if (np->rxopt.all)
Tom Parkin73df66f2013-01-31 01:02:24 +0000509 ip6_datagram_recv_ctl(sk, msg, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510
511 err = copied;
512 if (flags & MSG_TRUNC)
513 err = skb->len;
514
515out_free:
516 skb_free_datagram(sk, skb);
517out:
518 return err;
519
520csum_copy_err:
Herbert Xu3305b802005-12-13 23:16:37 -0800521 skb_kill_datagram(sk, skb, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522
523 /* Error for blocking case is chosen to masquerade
524 as some normal condition.
525 */
526 err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
Herbert Xu3305b802005-12-13 23:16:37 -0800527 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528}
529
David S. Miller4c9483b2011-03-12 16:22:43 -0500530static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
Herbert Xu357b40a2005-04-19 22:30:14 -0700531 struct raw6_sock *rp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532{
533 struct sk_buff *skb;
534 int err = 0;
Herbert Xu357b40a2005-04-19 22:30:14 -0700535 int offset;
536 int len;
Herbert Xu679a8732005-05-03 14:24:36 -0700537 int total_len;
Al Viro868c86b2006-11-14 21:35:48 -0800538 __wsum tmp_csum;
539 __sum16 csum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540
541 if (!rp->checksum)
542 goto send;
543
544 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
545 goto out;
546
Herbert Xu357b40a2005-04-19 22:30:14 -0700547 offset = rp->offset;
Steffen Klassert299b0762011-10-11 01:43:33 +0000548 total_len = inet_sk(sk)->cork.base.length;
Herbert Xu679a8732005-05-03 14:24:36 -0700549 if (offset >= total_len - 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 err = -EINVAL;
Herbert Xu357b40a2005-04-19 22:30:14 -0700551 ip6_flush_pending_frames(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 goto out;
553 }
554
555 /* should be check HW csum miyazawa */
556 if (skb_queue_len(&sk->sk_write_queue) == 1) {
557 /*
558 * Only one fragment on the socket.
559 */
560 tmp_csum = skb->csum;
561 } else {
Herbert Xu357b40a2005-04-19 22:30:14 -0700562 struct sk_buff *csum_skb = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 tmp_csum = 0;
564
565 skb_queue_walk(&sk->sk_write_queue, skb) {
566 tmp_csum = csum_add(tmp_csum, skb->csum);
Herbert Xu357b40a2005-04-19 22:30:14 -0700567
568 if (csum_skb)
569 continue;
570
Arnaldo Carvalho de Meloea2ae172007-04-25 17:55:53 -0700571 len = skb->len - skb_transport_offset(skb);
Herbert Xu357b40a2005-04-19 22:30:14 -0700572 if (offset >= len) {
573 offset -= len;
574 continue;
575 }
576
577 csum_skb = skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 }
Herbert Xu357b40a2005-04-19 22:30:14 -0700579
580 skb = csum_skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 }
582
Arnaldo Carvalho de Meloea2ae172007-04-25 17:55:53 -0700583 offset += skb_transport_offset(skb);
Herbert Xu357b40a2005-04-19 22:30:14 -0700584 if (skb_copy_bits(skb, offset, &csum, 2))
585 BUG();
586
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 /* in case cksum was not initialized */
Herbert Xu357b40a2005-04-19 22:30:14 -0700588 if (unlikely(csum))
Al Viro5f92a732006-11-14 21:36:54 -0800589 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590
David S. Miller4c9483b2011-03-12 16:22:43 -0500591 csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr,
592 total_len, fl6->flowi6_proto, tmp_csum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593
David S. Miller4c9483b2011-03-12 16:22:43 -0500594 if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP)
Al Virof6ab0282006-11-16 02:36:50 -0800595 csum = CSUM_MANGLED_0;
Herbert Xu357b40a2005-04-19 22:30:14 -0700596
Herbert Xu357b40a2005-04-19 22:30:14 -0700597 if (skb_store_bits(skb, offset, &csum, 2))
598 BUG();
599
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600send:
601 err = ip6_push_pending_frames(sk);
602out:
603 return err;
604}
605
606static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
David S. Miller4c9483b2011-03-12 16:22:43 -0500607 struct flowi6 *fl6, struct dst_entry **dstp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 unsigned int flags)
609{
Herbert Xu3320da82005-04-19 22:32:22 -0700610 struct ipv6_pinfo *np = inet6_sk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 struct ipv6hdr *iph;
612 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 int err;
Eric Dumazet1789a642010-06-03 22:23:57 +0000614 struct rt6_info *rt = (struct rt6_info *)*dstp;
Herbert Xua7ae1992011-11-18 02:20:04 +0000615 int hlen = LL_RESERVED_SPACE(rt->dst.dev);
616 int tlen = rt->dst.dev->needed_tailroom;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617
Changli Gaod8d1f302010-06-10 23:31:35 -0700618 if (length > rt->dst.dev->mtu) {
David S. Miller4c9483b2011-03-12 16:22:43 -0500619 ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 return -EMSGSIZE;
621 }
622 if (flags&MSG_PROBE)
623 goto out;
624
Johannes Bergf5184d22008-05-12 20:48:31 -0700625 skb = sock_alloc_send_skb(sk,
Herbert Xua7ae1992011-11-18 02:20:04 +0000626 length + hlen + tlen + 15,
Johannes Bergf5184d22008-05-12 20:48:31 -0700627 flags & MSG_DONTWAIT, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 if (skb == NULL)
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900629 goto error;
Herbert Xua7ae1992011-11-18 02:20:04 +0000630 skb_reserve(skb, hlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631
632 skb->priority = sk->sk_priority;
Laszlo Attila Toth4a19ec52008-01-30 19:08:16 -0800633 skb->mark = sk->sk_mark;
Changli Gaod8d1f302010-06-10 23:31:35 -0700634 skb_dst_set(skb, &rt->dst);
Eric Dumazet1789a642010-06-03 22:23:57 +0000635 *dstp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636
Arnaldo Carvalho de Melo1ced98e2007-03-10 19:57:15 -0300637 skb_put(skb, length);
638 skb_reset_network_header(skb);
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700639 iph = ipv6_hdr(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640
641 skb->ip_summed = CHECKSUM_NONE;
642
Arnaldo Carvalho de Melob0e380b2007-04-10 21:21:55 -0700643 skb->transport_header = skb->network_header;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 err = memcpy_fromiovecend((void *)iph, from, 0, length);
645 if (err)
646 goto error_fault;
647
Neil Hormanedf391f2009-04-27 02:45:02 -0700648 IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
Jan Engelhardtb2e0b382010-03-23 04:09:07 +0100649 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL,
Changli Gaod8d1f302010-06-10 23:31:35 -0700650 rt->dst.dev, dst_output);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 if (err > 0)
Eric Dumazet6ce9e7b2009-09-02 18:05:33 -0700652 err = net_xmit_errno(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653 if (err)
654 goto error;
655out:
656 return 0;
657
658error_fault:
659 err = -EFAULT;
660 kfree_skb(skb);
661error:
Denis V. Lunev3bd653c2008-10-08 10:54:51 -0700662 IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
Eric Dumazet6ce9e7b2009-09-02 18:05:33 -0700663 if (err == -ENOBUFS && !np->recverr)
664 err = 0;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900665 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666}
667
David S. Miller4c9483b2011-03-12 16:22:43 -0500668static int rawv6_probe_proto_opt(struct flowi6 *fl6, struct msghdr *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669{
670 struct iovec *iov;
671 u8 __user *type = NULL;
672 u8 __user *code = NULL;
Masahide NAKAMURA6e8f4d42006-08-23 20:36:47 -0700673 u8 len = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 int probed = 0;
675 int i;
676
677 if (!msg->msg_iov)
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800678 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679
680 for (i = 0; i < msg->msg_iovlen; i++) {
681 iov = &msg->msg_iov[i];
682 if (!iov)
683 continue;
684
David S. Miller4c9483b2011-03-12 16:22:43 -0500685 switch (fl6->flowi6_proto) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686 case IPPROTO_ICMPV6:
687 /* check if one-byte field is readable or not. */
688 if (iov->iov_base && iov->iov_len < 1)
689 break;
690
691 if (!type) {
692 type = iov->iov_base;
693 /* check if code field is readable or not. */
694 if (iov->iov_len > 1)
695 code = type + 1;
696 } else if (!code)
697 code = iov->iov_base;
698
699 if (type && code) {
David S. Miller1958b852011-03-12 16:36:19 -0500700 if (get_user(fl6->fl6_icmp_type, type) ||
701 get_user(fl6->fl6_icmp_code, code))
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800702 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 probed = 1;
704 }
705 break;
Masahide NAKAMURA6e8f4d42006-08-23 20:36:47 -0700706 case IPPROTO_MH:
707 if (iov->iov_base && iov->iov_len < 1)
708 break;
709 /* check if type field is readable or not. */
710 if (iov->iov_len > 2 - len) {
711 u8 __user *p = iov->iov_base;
David S. Miller1958b852011-03-12 16:36:19 -0500712 if (get_user(fl6->fl6_mh_type, &p[2 - len]))
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800713 return -EFAULT;
Masahide NAKAMURA6e8f4d42006-08-23 20:36:47 -0700714 probed = 1;
715 } else
716 len += iov->iov_len;
717
718 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 default:
720 probed = 1;
721 break;
722 }
723 if (probed)
724 break;
725 }
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800726 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727}
728
729static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
730 struct msghdr *msg, size_t len)
731{
732 struct ipv6_txoptions opt_space;
733 struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
Arnaud Ebalard20c59de2010-06-01 21:35:01 +0000734 struct in6_addr *daddr, *final_p, final;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 struct inet_sock *inet = inet_sk(sk);
736 struct ipv6_pinfo *np = inet6_sk(sk);
737 struct raw6_sock *rp = raw6_sk(sk);
738 struct ipv6_txoptions *opt = NULL;
739 struct ip6_flowlabel *flowlabel = NULL;
740 struct dst_entry *dst = NULL;
David S. Miller4c9483b2011-03-12 16:22:43 -0500741 struct flowi6 fl6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 int addr_len = msg->msg_namelen;
743 int hlimit = -1;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900744 int tclass = -1;
Brian Haley13b52cd2010-04-23 11:26:08 +0000745 int dontfrag = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 u16 proto;
747 int err;
748
749 /* Rough check on arithmetic overflow,
YOSHIFUJI Hideakib59e1392007-03-30 14:45:35 -0700750 better check is made in ip6_append_data().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 */
YOSHIFUJI Hideakib59e1392007-03-30 14:45:35 -0700752 if (len > INT_MAX)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 return -EMSGSIZE;
754
755 /* Mirror BSD error message compatibility */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900756 if (msg->msg_flags & MSG_OOB)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 return -EOPNOTSUPP;
758
759 /*
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900760 * Get and verify the address.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 */
David S. Miller4c9483b2011-03-12 16:22:43 -0500762 memset(&fl6, 0, sizeof(fl6));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763
David S. Miller4c9483b2011-03-12 16:22:43 -0500764 fl6.flowi6_mark = sk->sk_mark;
Laszlo Attila Toth4a19ec52008-01-30 19:08:16 -0800765
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 if (sin6) {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900767 if (addr_len < SIN6_LEN_RFC2133)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 return -EINVAL;
769
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900770 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
Eric Dumazeta02cec22010-09-22 20:43:57 +0000771 return -EAFNOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772
773 /* port is the proto value [0..255] carried in nexthdr */
774 proto = ntohs(sin6->sin6_port);
775
776 if (!proto)
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000777 proto = inet->inet_num;
778 else if (proto != inet->inet_num)
Eric Dumazeta02cec22010-09-22 20:43:57 +0000779 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780
781 if (proto > 255)
Eric Dumazeta02cec22010-09-22 20:43:57 +0000782 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783
784 daddr = &sin6->sin6_addr;
785 if (np->sndflow) {
David S. Miller4c9483b2011-03-12 16:22:43 -0500786 fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
787 if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
788 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 if (flowlabel == NULL)
790 return -EINVAL;
791 daddr = &flowlabel->dst;
792 }
793 }
794
795 /*
796 * Otherwise it will be difficult to maintain
797 * sk->sk_dst_cache.
798 */
799 if (sk->sk_state == TCP_ESTABLISHED &&
800 ipv6_addr_equal(daddr, &np->daddr))
801 daddr = &np->daddr;
802
803 if (addr_len >= sizeof(struct sockaddr_in6) &&
804 sin6->sin6_scope_id &&
805 ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
David S. Miller4c9483b2011-03-12 16:22:43 -0500806 fl6.flowi6_oif = sin6->sin6_scope_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 } else {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900808 if (sk->sk_state != TCP_ESTABLISHED)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 return -EDESTADDRREQ;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900810
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000811 proto = inet->inet_num;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812 daddr = &np->daddr;
David S. Miller4c9483b2011-03-12 16:22:43 -0500813 fl6.flowlabel = np->flow_label;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 }
815
David S. Miller4c9483b2011-03-12 16:22:43 -0500816 if (fl6.flowi6_oif == 0)
817 fl6.flowi6_oif = sk->sk_bound_dev_if;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818
819 if (msg->msg_controllen) {
820 opt = &opt_space;
821 memset(opt, 0, sizeof(struct ipv6_txoptions));
822 opt->tot_len = sizeof(struct ipv6_txoptions);
823
Tom Parkin73df66f2013-01-31 01:02:24 +0000824 err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt,
825 &hlimit, &tclass, &dontfrag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 if (err < 0) {
827 fl6_sock_release(flowlabel);
828 return err;
829 }
David S. Miller4c9483b2011-03-12 16:22:43 -0500830 if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
831 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 if (flowlabel == NULL)
833 return -EINVAL;
834 }
835 if (!(opt->opt_nflen|opt->opt_flen))
836 opt = NULL;
837 }
838 if (opt == NULL)
839 opt = np->opt;
YOSHIFUJI Hideakidf9890c2005-11-20 12:23:18 +0900840 if (flowlabel)
841 opt = fl6_merge_options(&opt_space, flowlabel, opt);
842 opt = ipv6_fixup_options(&opt_space, opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843
David S. Miller4c9483b2011-03-12 16:22:43 -0500844 fl6.flowi6_proto = proto;
845 err = rawv6_probe_proto_opt(&fl6, msg);
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800846 if (err)
847 goto out;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900848
Brian Haley876c7f42008-04-11 00:38:24 -0400849 if (!ipv6_addr_any(daddr))
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000850 fl6.daddr = *daddr;
Brian Haley876c7f42008-04-11 00:38:24 -0400851 else
David S. Miller4c9483b2011-03-12 16:22:43 -0500852 fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
853 if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000854 fl6.saddr = np->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855
David S. Miller4c9483b2011-03-12 16:22:43 -0500856 final_p = fl6_update_dst(&fl6, opt, &final);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857
David S. Miller4c9483b2011-03-12 16:22:43 -0500858 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
859 fl6.flowi6_oif = np->mcast_oif;
Erich E. Hooverc4062df2012-02-08 09:11:08 +0000860 else if (!fl6.flowi6_oif)
861 fl6.flowi6_oif = np->ucast_oif;
David S. Miller4c9483b2011-03-12 16:22:43 -0500862 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863
David S. Miller4c9483b2011-03-12 16:22:43 -0500864 dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true);
David S. Miller68d0c6d2011-03-01 13:19:07 -0800865 if (IS_ERR(dst)) {
866 err = PTR_ERR(dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 goto out;
David S. Miller14e50e52007-05-24 18:17:54 -0700868 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869 if (hlimit < 0) {
David S. Miller4c9483b2011-03-12 16:22:43 -0500870 if (ipv6_addr_is_multicast(&fl6.daddr))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 hlimit = np->mcast_hops;
872 else
873 hlimit = np->hop_limit;
874 if (hlimit < 0)
YOSHIFUJI Hideaki6b75d092008-03-10 06:00:30 -0400875 hlimit = ip6_dst_hoplimit(dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876 }
877
Gerrit Renkere651f032009-08-09 08:12:48 +0000878 if (tclass < 0)
YOSHIFUJI Hideakie012d512006-09-13 20:01:28 -0700879 tclass = np->tclass;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900880
Brian Haley13b52cd2010-04-23 11:26:08 +0000881 if (dontfrag < 0)
882 dontfrag = np->dontfrag;
883
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 if (msg->msg_flags&MSG_CONFIRM)
885 goto do_confirm;
886
887back_from_confirm:
Eric Dumazet1789a642010-06-03 22:23:57 +0000888 if (inet->hdrincl)
David S. Miller4c9483b2011-03-12 16:22:43 -0500889 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl6, &dst, msg->msg_flags);
Eric Dumazet1789a642010-06-03 22:23:57 +0000890 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 lock_sock(sk);
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900892 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
David S. Miller4c9483b2011-03-12 16:22:43 -0500893 len, 0, hlimit, tclass, opt, &fl6, (struct rt6_info*)dst,
Brian Haley13b52cd2010-04-23 11:26:08 +0000894 msg->msg_flags, dontfrag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895
896 if (err)
897 ip6_flush_pending_frames(sk);
898 else if (!(msg->msg_flags & MSG_MORE))
David S. Miller4c9483b2011-03-12 16:22:43 -0500899 err = rawv6_push_pending_frames(sk, &fl6, rp);
YOSHIFUJI Hideaki3ef9d942007-09-14 16:45:40 -0700900 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 }
902done:
Nicolas DICHTEL6d3e85e2006-02-13 15:56:13 -0800903 dst_release(dst);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900904out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 fl6_sock_release(flowlabel);
906 return err<0?err:len;
907do_confirm:
908 dst_confirm(dst);
909 if (!(msg->msg_flags & MSG_PROBE) || len)
910 goto back_from_confirm;
911 err = 0;
912 goto done;
913}
914
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900915static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916 char __user *optval, int optlen)
917{
918 switch (optname) {
919 case ICMPV6_FILTER:
920 if (optlen > sizeof(struct icmp6_filter))
921 optlen = sizeof(struct icmp6_filter);
922 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
923 return -EFAULT;
924 return 0;
925 default:
926 return -ENOPROTOOPT;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700927 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928
929 return 0;
930}
931
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900932static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933 char __user *optval, int __user *optlen)
934{
935 int len;
936
937 switch (optname) {
938 case ICMPV6_FILTER:
939 if (get_user(len, optlen))
940 return -EFAULT;
941 if (len < 0)
942 return -EINVAL;
943 if (len > sizeof(struct icmp6_filter))
944 len = sizeof(struct icmp6_filter);
945 if (put_user(len, optlen))
946 return -EFAULT;
947 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
948 return -EFAULT;
949 return 0;
950 default:
951 return -ENOPROTOOPT;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700952 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953
954 return 0;
955}
956
957
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800958static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700959 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960{
961 struct raw6_sock *rp = raw6_sk(sk);
962 int val;
963
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900964 if (get_user(val, (int __user *)optval))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 return -EFAULT;
966
967 switch (optname) {
Joe Perches207ec0a2011-07-01 09:43:08 +0000968 case IPV6_CHECKSUM:
969 if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
970 level == IPPROTO_IPV6) {
971 /*
972 * RFC3542 tells that IPV6_CHECKSUM socket
973 * option in the IPPROTO_IPV6 level is not
974 * allowed on ICMPv6 sockets.
975 * If you want to set it, use IPPROTO_RAW
976 * level IPV6_CHECKSUM socket option
977 * (Linux extension).
978 */
979 return -EINVAL;
980 }
YOSHIFUJI Hideaki1a98d052008-04-24 21:30:38 -0700981
Joe Perches207ec0a2011-07-01 09:43:08 +0000982 /* You may get strange result with a positive odd offset;
983 RFC2292bis agrees with me. */
984 if (val > 0 && (val&1))
985 return -EINVAL;
986 if (val < 0) {
987 rp->checksum = 0;
988 } else {
989 rp->checksum = 1;
990 rp->offset = val;
991 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992
Joe Perches207ec0a2011-07-01 09:43:08 +0000993 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994
Joe Perches207ec0a2011-07-01 09:43:08 +0000995 default:
996 return -ENOPROTOOPT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997 }
998}
999
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001000static int rawv6_setsockopt(struct sock *sk, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -07001001 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002{
Joe Perches207ec0a2011-07-01 09:43:08 +00001003 switch (level) {
1004 case SOL_RAW:
1005 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006
Joe Perches207ec0a2011-07-01 09:43:08 +00001007 case SOL_ICMPV6:
1008 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1009 return -EOPNOTSUPP;
1010 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1011 case SOL_IPV6:
1012 if (optname == IPV6_CHECKSUM)
1013 break;
1014 default:
1015 return ipv6_setsockopt(sk, level, optname, optval, optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001016 }
1017
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001018 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1019}
1020
1021#ifdef CONFIG_COMPAT
1022static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -07001023 char __user *optval, unsigned int optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001024{
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001025 switch (level) {
1026 case SOL_RAW:
1027 break;
1028 case SOL_ICMPV6:
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001029 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001030 return -EOPNOTSUPP;
1031 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1032 case SOL_IPV6:
1033 if (optname == IPV6_CHECKSUM)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001034 break;
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001035 default:
1036 return compat_ipv6_setsockopt(sk, level, optname,
1037 optval, optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001038 }
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001039 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1040}
1041#endif
1042
1043static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1044 char __user *optval, int __user *optlen)
1045{
1046 struct raw6_sock *rp = raw6_sk(sk);
1047 int val, len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048
1049 if (get_user(len,optlen))
1050 return -EFAULT;
1051
1052 switch (optname) {
1053 case IPV6_CHECKSUM:
YOSHIFUJI Hideaki1a98d052008-04-24 21:30:38 -07001054 /*
1055 * We allow getsockopt() for IPPROTO_IPV6-level
1056 * IPV6_CHECKSUM socket option on ICMPv6 sockets
1057 * since RFC3542 is silent about it.
1058 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059 if (rp->checksum == 0)
1060 val = -1;
1061 else
1062 val = rp->offset;
1063 break;
1064
1065 default:
1066 return -ENOPROTOOPT;
1067 }
1068
1069 len = min_t(unsigned int, sizeof(int), len);
1070
1071 if (put_user(len, optlen))
1072 return -EFAULT;
1073 if (copy_to_user(optval,&val,len))
1074 return -EFAULT;
1075 return 0;
1076}
1077
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001078static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1079 char __user *optval, int __user *optlen)
1080{
Joe Perches207ec0a2011-07-01 09:43:08 +00001081 switch (level) {
1082 case SOL_RAW:
1083 break;
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001084
Joe Perches207ec0a2011-07-01 09:43:08 +00001085 case SOL_ICMPV6:
1086 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1087 return -EOPNOTSUPP;
1088 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1089 case SOL_IPV6:
1090 if (optname == IPV6_CHECKSUM)
1091 break;
1092 default:
1093 return ipv6_getsockopt(sk, level, optname, optval, optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001094 }
1095
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001096 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1097}
1098
1099#ifdef CONFIG_COMPAT
1100static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001101 char __user *optval, int __user *optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001102{
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001103 switch (level) {
1104 case SOL_RAW:
1105 break;
1106 case SOL_ICMPV6:
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001107 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001108 return -EOPNOTSUPP;
1109 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1110 case SOL_IPV6:
1111 if (optname == IPV6_CHECKSUM)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001112 break;
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001113 default:
1114 return compat_ipv6_getsockopt(sk, level, optname,
1115 optval, optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001116 }
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001117 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1118}
1119#endif
1120
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1122{
Joe Perches207ec0a2011-07-01 09:43:08 +00001123 switch (cmd) {
1124 case SIOCOUTQ: {
1125 int amount = sk_wmem_alloc_get(sk);
Eric Dumazet31e6d362009-06-17 19:05:41 -07001126
Joe Perches207ec0a2011-07-01 09:43:08 +00001127 return put_user(amount, (int __user *)arg);
1128 }
1129 case SIOCINQ: {
1130 struct sk_buff *skb;
1131 int amount = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132
Joe Perches207ec0a2011-07-01 09:43:08 +00001133 spin_lock_bh(&sk->sk_receive_queue.lock);
1134 skb = skb_peek(&sk->sk_receive_queue);
1135 if (skb != NULL)
1136 amount = skb->tail - skb->transport_header;
1137 spin_unlock_bh(&sk->sk_receive_queue.lock);
1138 return put_user(amount, (int __user *)arg);
1139 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140
Joe Perches207ec0a2011-07-01 09:43:08 +00001141 default:
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001142#ifdef CONFIG_IPV6_MROUTE
Joe Perches207ec0a2011-07-01 09:43:08 +00001143 return ip6mr_ioctl(sk, cmd, (void __user *)arg);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001144#else
Joe Perches207ec0a2011-07-01 09:43:08 +00001145 return -ENOIOCTLCMD;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001146#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 }
1148}
1149
David S. Millere2d57762011-02-03 17:59:32 -08001150#ifdef CONFIG_COMPAT
1151static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
1152{
1153 switch (cmd) {
1154 case SIOCOUTQ:
1155 case SIOCINQ:
1156 return -ENOIOCTLCMD;
1157 default:
1158#ifdef CONFIG_IPV6_MROUTE
1159 return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
1160#else
1161 return -ENOIOCTLCMD;
1162#endif
1163 }
1164}
1165#endif
1166
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167static void rawv6_close(struct sock *sk, long timeout)
1168{
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001169 if (inet_sk(sk)->inet_num == IPPROTO_RAW)
Denis V. Lunev725a8ff2008-07-19 00:28:58 -07001170 ip6_ra_control(sk, -1);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001171 ip6mr_sk_done(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172 sk_common_release(sk);
1173}
1174
Brian Haley7d06b2e2008-06-14 17:04:49 -07001175static void raw6_destroy(struct sock *sk)
Denis V. Lunev22dd4852008-06-04 15:16:12 -07001176{
1177 lock_sock(sk);
1178 ip6_flush_pending_frames(sk);
1179 release_sock(sk);
David S. Millerf23d60d2008-06-12 14:47:58 -07001180
Brian Haley7d06b2e2008-06-14 17:04:49 -07001181 inet6_destroy_sock(sk);
Denis V. Lunev22dd4852008-06-04 15:16:12 -07001182}
1183
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184static int rawv6_init_sk(struct sock *sk)
1185{
Masahide NAKAMURAf48d5ff2007-02-07 00:07:39 -08001186 struct raw6_sock *rp = raw6_sk(sk);
1187
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001188 switch (inet_sk(sk)->inet_num) {
Masahide NAKAMURAf48d5ff2007-02-07 00:07:39 -08001189 case IPPROTO_ICMPV6:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190 rp->checksum = 1;
1191 rp->offset = 2;
Masahide NAKAMURAf48d5ff2007-02-07 00:07:39 -08001192 break;
1193 case IPPROTO_MH:
1194 rp->checksum = 1;
1195 rp->offset = 4;
1196 break;
1197 default:
1198 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199 }
Eric Dumazeta02cec22010-09-22 20:43:57 +00001200 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201}
1202
1203struct proto rawv6_prot = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001204 .name = "RAWv6",
1205 .owner = THIS_MODULE,
1206 .close = rawv6_close,
Denis V. Lunev22dd4852008-06-04 15:16:12 -07001207 .destroy = raw6_destroy,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001208 .connect = ip6_datagram_connect,
1209 .disconnect = udp_disconnect,
1210 .ioctl = rawv6_ioctl,
1211 .init = rawv6_init_sk,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001212 .setsockopt = rawv6_setsockopt,
1213 .getsockopt = rawv6_getsockopt,
1214 .sendmsg = rawv6_sendmsg,
1215 .recvmsg = rawv6_recvmsg,
1216 .bind = rawv6_bind,
1217 .backlog_rcv = rawv6_rcv_skb,
Pavel Emelyanovfc8717b2008-03-22 16:56:51 -07001218 .hash = raw_hash_sk,
1219 .unhash = raw_unhash_sk,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001220 .obj_size = sizeof(struct raw6_sock),
Pavel Emelyanovfc8717b2008-03-22 16:56:51 -07001221 .h.raw_hash = &raw_v6_hashinfo,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001222#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001223 .compat_setsockopt = compat_rawv6_setsockopt,
1224 .compat_getsockopt = compat_rawv6_getsockopt,
David S. Millere2d57762011-02-03 17:59:32 -08001225 .compat_ioctl = compat_rawv6_ioctl,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001226#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227};
1228
1229#ifdef CONFIG_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1231{
1232 struct ipv6_pinfo *np = inet6_sk(sp);
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001233 const struct in6_addr *dest, *src;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 __u16 destp, srcp;
1235
1236 dest = &np->daddr;
1237 src = &np->rcv_saddr;
1238 destp = 0;
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001239 srcp = inet_sk(sp)->inet_num;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 seq_printf(seq,
1241 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
Dan Rosenberg71338aa2011-05-23 12:17:35 +00001242 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 i,
1244 src->s6_addr32[0], src->s6_addr32[1],
1245 src->s6_addr32[2], src->s6_addr32[3], srcp,
1246 dest->s6_addr32[0], dest->s6_addr32[1],
1247 dest->s6_addr32[2], dest->s6_addr32[3], destp,
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001248 sp->sk_state,
Eric Dumazet31e6d362009-06-17 19:05:41 -07001249 sk_wmem_alloc_get(sp),
1250 sk_rmem_alloc_get(sp),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251 0, 0L, 0,
Eric W. Biedermana7cb5a42012-05-24 01:10:10 -06001252 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)),
1253 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 sock_i_ino(sp),
Wang Chena92aa312007-11-13 20:31:14 -08001255 atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256}
1257
1258static int raw6_seq_show(struct seq_file *seq, void *v)
1259{
1260 if (v == SEQ_START_TOKEN)
1261 seq_printf(seq,
1262 " sl "
1263 "local_address "
1264 "remote_address "
1265 "st tx_queue rx_queue tr tm->when retrnsmt"
Eric Dumazetcb61cb92008-06-17 21:04:56 -07001266 " uid timeout inode ref pointer drops\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267 else
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001268 raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269 return 0;
1270}
1271
Philippe De Muyter56b3d972007-07-10 23:07:31 -07001272static const struct seq_operations raw6_seq_ops = {
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001273 .start = raw_seq_start,
1274 .next = raw_seq_next,
1275 .stop = raw_seq_stop,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276 .show = raw6_seq_show,
1277};
1278
1279static int raw6_seq_open(struct inode *inode, struct file *file)
1280{
Denis V. Lunev3046d762008-01-31 03:48:55 -08001281 return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282}
1283
Arjan van de Ven9a321442007-02-12 00:55:35 -08001284static const struct file_operations raw6_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285 .owner = THIS_MODULE,
1286 .open = raw6_seq_open,
1287 .read = seq_read,
1288 .llseek = seq_lseek,
Pavel Emelyanovf51d5992008-01-14 05:35:57 -08001289 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290};
1291
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00001292static int __net_init raw6_init_net(struct net *net)
Pavel Emelyanova308da12008-01-14 05:36:50 -08001293{
Gao fengd4beaa62013-02-18 01:34:54 +00001294 if (!proc_create("raw6", S_IRUGO, net->proc_net, &raw6_seq_fops))
Pavel Emelyanova308da12008-01-14 05:36:50 -08001295 return -ENOMEM;
1296
1297 return 0;
1298}
1299
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00001300static void __net_exit raw6_exit_net(struct net *net)
Pavel Emelyanova308da12008-01-14 05:36:50 -08001301{
Gao fengece31ff2013-02-18 01:34:56 +00001302 remove_proc_entry("raw6", net->proc_net);
Pavel Emelyanova308da12008-01-14 05:36:50 -08001303}
1304
1305static struct pernet_operations raw6_net_ops = {
1306 .init = raw6_init_net,
1307 .exit = raw6_exit_net,
1308};
1309
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310int __init raw6_proc_init(void)
1311{
Pavel Emelyanova308da12008-01-14 05:36:50 -08001312 return register_pernet_subsys(&raw6_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313}
1314
1315void raw6_proc_exit(void)
1316{
Pavel Emelyanova308da12008-01-14 05:36:50 -08001317 unregister_pernet_subsys(&raw6_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318}
1319#endif /* CONFIG_PROC_FS */
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001320
1321/* Same as inet6_dgram_ops, sans udp_poll. */
1322static const struct proto_ops inet6_sockraw_ops = {
1323 .family = PF_INET6,
1324 .owner = THIS_MODULE,
1325 .release = inet6_release,
1326 .bind = inet6_bind,
1327 .connect = inet_dgram_connect, /* ok */
1328 .socketpair = sock_no_socketpair, /* a do nothing */
1329 .accept = sock_no_accept, /* a do nothing */
1330 .getname = inet6_getname,
1331 .poll = datagram_poll, /* ok */
1332 .ioctl = inet6_ioctl, /* must change */
1333 .listen = sock_no_listen, /* ok */
1334 .shutdown = inet_shutdown, /* ok */
1335 .setsockopt = sock_common_setsockopt, /* ok */
1336 .getsockopt = sock_common_getsockopt, /* ok */
1337 .sendmsg = inet_sendmsg, /* ok */
1338 .recvmsg = sock_common_recvmsg, /* ok */
1339 .mmap = sock_no_mmap,
1340 .sendpage = sock_no_sendpage,
1341#ifdef CONFIG_COMPAT
1342 .compat_setsockopt = compat_sock_common_setsockopt,
1343 .compat_getsockopt = compat_sock_common_getsockopt,
1344#endif
1345};
1346
1347static struct inet_protosw rawv6_protosw = {
1348 .type = SOCK_RAW,
1349 .protocol = IPPROTO_IP, /* wild card */
1350 .prot = &rawv6_prot,
1351 .ops = &inet6_sockraw_ops,
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001352 .no_check = UDP_CSUM_DEFAULT,
1353 .flags = INET_PROTOSW_REUSE,
1354};
1355
1356int __init rawv6_init(void)
1357{
1358 int ret;
1359
1360 ret = inet6_register_protosw(&rawv6_protosw);
1361 if (ret)
1362 goto out;
1363out:
1364 return ret;
1365}
1366
Daniel Lezcano09f77092007-12-13 05:34:58 -08001367void rawv6_exit(void)
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001368{
1369 inet6_unregister_protosw(&rawv6_protosw);
1370}