blob: 1f29996e368a23e67bfe09d9b2ff10bd9b61805d [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
Werner Almesbergerd1c53c82013-08-02 10:51:34 -030066#define ICMPV6_HDRLEN 4 /* ICMPv6 header, RFC 4443 Section 2.1 */
67
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -080068static struct raw_hashinfo raw_v6_hashinfo = {
Robert P. J. Day938b93a2008-03-18 00:59:23 -070069 .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -080070};
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
Pavel Emelyanovbe185882008-01-14 05:35:31 -080072static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
Eric Dumazetb71d1d42011-04-22 04:53:02 +000073 unsigned short num, const struct in6_addr *loc_addr,
74 const struct in6_addr *rmt_addr, int dif)
Linus Torvalds1da177e2005-04-16 15:20:36 -070075{
Eric Dumazeta50feda2012-05-18 18:57:34 +000076 bool is_multicast = ipv6_addr_is_multicast(loc_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
Sasha Levinb67bfe02013-02-27 17:06:00 -080078 sk_for_each_from(sk)
Eric Dumazetc720c7e2009-10-15 06:30:45 +000079 if (inet_sk(sk)->inet_num == num) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070080
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +090081 if (!net_eq(sock_net(sk), net))
Pavel Emelyanovbe185882008-01-14 05:35:31 -080082 continue;
83
Eric Dumazetefe42082013-10-03 15:42:29 -070084 if (!ipv6_addr_any(&sk->sk_v6_daddr) &&
85 !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr))
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 continue;
87
Andrew McDonald0bd1b592005-08-09 19:44:42 -070088 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
89 continue;
90
Eric Dumazetefe42082013-10-03 15:42:29 -070091 if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) {
92 if (ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr))
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 goto found;
94 if (is_multicast &&
95 inet6_mc_check(sk, loc_addr, rmt_addr))
96 goto found;
97 continue;
98 }
99 goto found;
100 }
101 sk = NULL;
102found:
103 return sk;
104}
105
106/*
107 * 0 - deliver
108 * 1 - block
109 */
Eric Dumazet1b05c4b2012-09-25 07:03:40 +0000110static int icmpv6_filter(const struct sock *sk, const struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111{
Werner Almesberger9cc08af2013-08-02 10:51:19 -0300112 struct icmp6hdr _hdr;
Eric Dumazet1b05c4b2012-09-25 07:03:40 +0000113 const struct icmp6hdr *hdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
Werner Almesbergerd1c53c82013-08-02 10:51:34 -0300115 /* We require only the four bytes of the ICMPv6 header, not any
116 * additional bytes of message body in "struct icmp6hdr".
117 */
Eric Dumazet1b05c4b2012-09-25 07:03:40 +0000118 hdr = skb_header_pointer(skb, skb_transport_offset(skb),
Werner Almesbergerd1c53c82013-08-02 10:51:34 -0300119 ICMPV6_HDRLEN, &_hdr);
Eric Dumazet1b05c4b2012-09-25 07:03:40 +0000120 if (hdr) {
121 const __u32 *data = &raw6_sk(sk)->filter.data[0];
122 unsigned int type = hdr->icmp6_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
Eric Dumazet1b05c4b2012-09-25 07:03:40 +0000124 return (data[type >> 5] & (1U << (type & 31))) != 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 }
Eric Dumazet1b05c4b2012-09-25 07:03:40 +0000126 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127}
128
Amerigo Wang07a93622012-10-29 16:23:10 +0000129#if IS_ENABLED(CONFIG_IPV6_MIP6)
Eric Dumazetf2eda472011-01-20 07:37:53 +0000130typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb);
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700131
Eric Dumazetf2eda472011-01-20 07:37:53 +0000132static mh_filter_t __rcu *mh_filter __read_mostly;
133
134int rawv6_mh_filter_register(mh_filter_t filter)
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700135{
Eric Dumazetcf778b02012-01-12 04:41:32 +0000136 rcu_assign_pointer(mh_filter, filter);
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700137 return 0;
138}
139EXPORT_SYMBOL(rawv6_mh_filter_register);
140
Eric Dumazetf2eda472011-01-20 07:37:53 +0000141int rawv6_mh_filter_unregister(mh_filter_t filter)
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700142{
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +0000143 RCU_INIT_POINTER(mh_filter, NULL);
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700144 synchronize_rcu();
145 return 0;
146}
147EXPORT_SYMBOL(rawv6_mh_filter_unregister);
148
149#endif
150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151/*
152 * demultiplex raw sockets.
153 * (should consider queueing the skb in the sock receive_queue
154 * without calling rawv6.c)
155 *
156 * Caller owns SKB so we must make clones.
157 */
Eric Dumazeta50feda2012-05-18 18:57:34 +0000158static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159{
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000160 const struct in6_addr *saddr;
161 const struct in6_addr *daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 struct sock *sk;
Eric Dumazeta50feda2012-05-18 18:57:34 +0000163 bool delivered = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 __u8 hash;
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800165 struct net *net;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700167 saddr = &ipv6_hdr(skb)->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 daddr = saddr + 1;
169
David S. Millerf9242b62012-06-19 18:56:21 -0700170 hash = nexthdr & (RAW_HTABLE_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800172 read_lock(&raw_v6_hashinfo.lock);
173 sk = sk_head(&raw_v6_hashinfo.ht[hash]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 if (sk == NULL)
176 goto out;
177
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900178 net = dev_net(skb->dev);
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800179 sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
181 while (sk) {
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700182 int filtered;
183
Eric Dumazeta50feda2012-05-18 18:57:34 +0000184 delivered = true;
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700185 switch (nexthdr) {
186 case IPPROTO_ICMPV6:
187 filtered = icmpv6_filter(sk, skb);
188 break;
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700189
Amerigo Wang07a93622012-10-29 16:23:10 +0000190#if IS_ENABLED(CONFIG_IPV6_MIP6)
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700191 case IPPROTO_MH:
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700192 {
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700193 /* XXX: To validate MH only once for each packet,
194 * this is placed here. It should be after checking
195 * xfrm policy, however it doesn't. The checking xfrm
196 * policy is placed in rawv6_rcv() because it is
197 * required for each socket.
198 */
Eric Dumazetf2eda472011-01-20 07:37:53 +0000199 mh_filter_t *filter;
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700200
201 filter = rcu_dereference(mh_filter);
Eric Dumazetf2eda472011-01-20 07:37:53 +0000202 filtered = filter ? (*filter)(sk, skb) : 0;
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700203 break;
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700204 }
Masahide NAKAMURA7be96f72006-08-23 20:35:31 -0700205#endif
206 default:
207 filtered = 0;
208 break;
209 }
210
211 if (filtered < 0)
212 break;
213 if (filtered == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
215
216 /* Not releasing hash table! */
Yasuyuki Kozakai9fb9cbb2005-11-09 16:38:16 -0800217 if (clone) {
218 nf_reset(clone);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 rawv6_rcv(sk, clone);
Yasuyuki Kozakai9fb9cbb2005-11-09 16:38:16 -0800220 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 }
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800222 sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
YOSHIFUJI Hideaki2dac4b92005-09-01 17:44:49 -0700223 IP6CB(skb)->iif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 }
225out:
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800226 read_unlock(&raw_v6_hashinfo.lock);
Patrick McHardyd13964f2005-08-09 19:45:02 -0700227 return delivered;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228}
229
Eric Dumazeta50feda2012-05-18 18:57:34 +0000230bool raw6_local_deliver(struct sk_buff *skb, int nexthdr)
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800231{
232 struct sock *raw_sk;
233
David S. Millerf9242b62012-06-19 18:56:21 -0700234 raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (RAW_HTABLE_SIZE - 1)]);
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800235 if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
236 raw_sk = NULL;
237
238 return raw_sk != NULL;
239}
240
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241/* This cleans up af_inet6 a bit. -DaveM */
242static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
243{
244 struct inet_sock *inet = inet_sk(sk);
245 struct ipv6_pinfo *np = inet6_sk(sk);
246 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
Al Viroe69a4adc2006-11-14 20:56:00 -0800247 __be32 v4addr = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 int addr_type;
249 int err;
250
251 if (addr_len < SIN6_LEN_RFC2133)
252 return -EINVAL;
Hannes Frederic Sowa82b276c2014-01-20 05:16:39 +0100253
254 if (addr->sin6_family != AF_INET6)
255 return -EINVAL;
256
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 addr_type = ipv6_addr_type(&addr->sin6_addr);
258
259 /* Raw sockets are IPv6 only */
260 if (addr_type == IPV6_ADDR_MAPPED)
Eric Dumazetfd5c0022009-11-06 07:01:17 +0000261 return -EADDRNOTAVAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262
263 lock_sock(sk);
264
265 err = -EINVAL;
266 if (sk->sk_state != TCP_CLOSE)
267 goto out;
268
Eric Dumazetfd5c0022009-11-06 07:01:17 +0000269 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 /* Check if the address belongs to the host. */
271 if (addr_type != IPV6_ADDR_ANY) {
272 struct net_device *dev = NULL;
273
Hannes Frederic Sowa842df072013-03-08 02:07:19 +0000274 if (__ipv6_addr_needs_scope_id(addr_type)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 if (addr_len >= sizeof(struct sockaddr_in6) &&
276 addr->sin6_scope_id) {
277 /* Override any existing binding, if another
278 * one is supplied by user.
279 */
280 sk->sk_bound_dev_if = addr->sin6_scope_id;
281 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900282
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 /* Binding to link-local address requires an interface */
284 if (!sk->sk_bound_dev_if)
Eric Dumazetfd5c0022009-11-06 07:01:17 +0000285 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286
Eric Dumazetfd5c0022009-11-06 07:01:17 +0000287 err = -ENODEV;
288 dev = dev_get_by_index_rcu(sock_net(sk),
289 sk->sk_bound_dev_if);
290 if (!dev)
291 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900293
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 /* ipv4 addr of the socket is invalid. Only the
295 * unspecified and mapped address have a v4 equivalent.
296 */
297 v4addr = LOOPBACK4_IPV6;
298 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
299 err = -EADDRNOTAVAIL;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900300 if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
Daniel Lezcanobfeade02008-01-10 22:43:18 -0800301 dev, 0)) {
Eric Dumazetfd5c0022009-11-06 07:01:17 +0000302 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 }
304 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 }
306
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000307 inet->inet_rcv_saddr = inet->inet_saddr = v4addr;
Eric Dumazetefe42082013-10-03 15:42:29 -0700308 sk->sk_v6_rcv_saddr = addr->sin6_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 if (!(addr_type & IPV6_ADDR_MULTICAST))
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000310 np->saddr = addr->sin6_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 err = 0;
Eric Dumazetfd5c0022009-11-06 07:01:17 +0000312out_unlock:
313 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314out:
315 release_sock(sk);
316 return err;
317}
318
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800319static void rawv6_err(struct sock *sk, struct sk_buff *skb,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 struct inet6_skb_parm *opt,
Brian Haleyd5fdd6b2009-06-23 04:31:07 -0700321 u8 type, u8 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);
David S. Miller81aded22012-06-15 14:54:11 -0700337 if (type == ICMPV6_PKT_TOOBIG) {
338 ip6_sk_update_pmtu(skb, sk, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
David S. Miller81aded22012-06-15 14:54:11 -0700340 }
Duan Jiong8d65b112013-09-20 18:21:25 +0800341 if (type == NDISC_REDIRECT) {
David S. Millerec18d9a2012-07-12 00:25:15 -0700342 ip6_sk_redirect(skb, sk);
Duan Jiong8d65b112013-09-20 18:21:25 +0800343 return;
344 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 if (np->recverr) {
346 u8 *payload = skb->data;
347 if (!inet->hdrincl)
348 payload += offset;
349 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
350 }
351
352 if (np->recverr || harderr) {
353 sk->sk_err = err;
354 sk->sk_error_report(sk);
355 }
356}
357
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800358void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
Brian Haleyd5fdd6b2009-06-23 04:31:07 -0700359 u8 type, u8 code, int inner_offset, __be32 info)
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800360{
361 struct sock *sk;
362 int hash;
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000363 const struct in6_addr *saddr, *daddr;
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800364 struct net *net;
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800365
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800366 hash = nexthdr & (RAW_HTABLE_SIZE - 1);
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800367
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800368 read_lock(&raw_v6_hashinfo.lock);
369 sk = sk_head(&raw_v6_hashinfo.ht[hash]);
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800370 if (sk != NULL) {
YOSHIFUJI Hideaki05f175c2008-04-11 23:51:26 +0900371 /* Note: ipv6_hdr(skb) != skb->data */
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000372 const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data;
YOSHIFUJI Hideaki05f175c2008-04-11 23:51:26 +0900373 saddr = &ip6h->saddr;
374 daddr = &ip6h->daddr;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900375 net = dev_net(skb->dev);
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800376
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800377 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800378 IP6CB(skb)->iif))) {
379 rawv6_err(sk, skb, NULL, type, code,
380 inner_offset, info);
381 sk = sk_next(sk);
382 }
383 }
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800384 read_unlock(&raw_v6_hashinfo.lock);
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800385}
386
Eric Dumazet33d480c2011-08-11 19:30:52 +0000387static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388{
Eric Dumazet33d480c2011-08-11 19:30:52 +0000389 if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) &&
Herbert Xufb286bb2005-11-10 13:01:24 -0800390 skb_checksum_complete(skb)) {
Wang Chena92aa312007-11-13 20:31:14 -0800391 atomic_inc(&sk->sk_drops);
Herbert Xufb286bb2005-11-10 13:01:24 -0800392 kfree_skb(skb);
Yang Hongyang3cc76ca2008-08-29 14:06:51 -0700393 return NET_RX_DROP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 }
395
396 /* Charge it to the socket. */
Eric Dumazetd826eb12011-11-09 07:24:35 +0000397 skb_dst_drop(skb);
398 if (sock_queue_rcv_skb(sk, skb) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 kfree_skb(skb);
Yang Hongyang3cc76ca2008-08-29 14:06:51 -0700400 return NET_RX_DROP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 }
402
403 return 0;
404}
405
406/*
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900407 * This is next to useless...
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 * if we demultiplex in network layer we don't need the extra call
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900409 * just to queue the skb...
410 * maybe we could have the network decide upon a hint if it
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 * should call raw_rcv for demultiplexing
412 */
413int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
414{
415 struct inet_sock *inet = inet_sk(sk);
416 struct raw6_sock *rp = raw6_sk(sk);
417
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900418 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
Wang Chena92aa312007-11-13 20:31:14 -0800419 atomic_inc(&sk->sk_drops);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900420 kfree_skb(skb);
421 return NET_RX_DROP;
422 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423
424 if (!rp->checksum)
425 skb->ip_summed = CHECKSUM_UNNECESSARY;
426
Patrick McHardy84fa7932006-08-29 16:44:56 -0700427 if (skb->ip_summed == CHECKSUM_COMPLETE) {
Arnaldo Carvalho de Melod56f90a2007-04-10 20:50:43 -0700428 skb_postpull_rcsum(skb, skb_network_header(skb),
Arnaldo Carvalho de Melocfe1fc72007-03-16 17:26:39 -0300429 skb_network_header_len(skb));
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700430 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
431 &ipv6_hdr(skb)->daddr,
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000432 skb->len, inet->inet_num, skb->csum))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 skb->ip_summed = CHECKSUM_UNNECESSARY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 }
Herbert Xu60476372007-04-09 11:59:39 -0700435 if (!skb_csum_unnecessary(skb))
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700436 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
437 &ipv6_hdr(skb)->daddr,
438 skb->len,
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000439 inet->inet_num, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440
441 if (inet->hdrincl) {
Herbert Xufb286bb2005-11-10 13:01:24 -0800442 if (skb_checksum_complete(skb)) {
Wang Chena92aa312007-11-13 20:31:14 -0800443 atomic_inc(&sk->sk_drops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 kfree_skb(skb);
Yang Hongyang3cc76ca2008-08-29 14:06:51 -0700445 return NET_RX_DROP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 }
448
449 rawv6_rcv_skb(sk, skb);
450 return 0;
451}
452
453
454/*
455 * This should be easy, if there is something there
456 * we return it, otherwise we block.
457 */
458
459static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
460 struct msghdr *msg, size_t len,
461 int noblock, int flags, int *addr_len)
462{
463 struct ipv6_pinfo *np = inet6_sk(sk);
Steffen Hurrle342dfc32014-01-17 22:53:15 +0100464 DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 struct sk_buff *skb;
466 size_t copied;
467 int err;
468
469 if (flags & MSG_OOB)
470 return -EOPNOTSUPP;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900471
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 if (flags & MSG_ERRQUEUE)
Hannes Frederic Sowa85fbaa72013-11-23 00:46:12 +0100473 return ipv6_recv_error(sk, msg, len, addr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474
Brian Haley4b340ae2010-04-23 11:26:09 +0000475 if (np->rxpmtu && np->rxopt.bits.rxpmtu)
Hannes Frederic Sowa85fbaa72013-11-23 00:46:12 +0100476 return ipv6_recv_rxpmtu(sk, msg, len, addr_len);
Brian Haley4b340ae2010-04-23 11:26:09 +0000477
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 skb = skb_recv_datagram(sk, flags, noblock, &err);
479 if (!skb)
480 goto out;
481
482 copied = skb->len;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900483 if (copied > len) {
484 copied = len;
485 msg->msg_flags |= MSG_TRUNC;
486 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487
Herbert Xu60476372007-04-09 11:59:39 -0700488 if (skb_csum_unnecessary(skb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
490 } else if (msg->msg_flags&MSG_TRUNC) {
Herbert Xufb286bb2005-11-10 13:01:24 -0800491 if (__skb_checksum_complete(skb))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 goto csum_copy_err;
493 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
494 } else {
495 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
496 if (err == -EINVAL)
497 goto csum_copy_err;
498 }
499 if (err)
500 goto out_free;
501
502 /* Copy the address. */
503 if (sin6) {
504 sin6->sin6_family = AF_INET6;
Tetsuo Handaf59fc7f2006-07-25 17:05:35 -0700505 sin6->sin6_port = 0;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000506 sin6->sin6_addr = ipv6_hdr(skb)->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 sin6->sin6_flowinfo = 0;
Hannes Frederic Sowa842df072013-03-08 02:07:19 +0000508 sin6->sin6_scope_id = ipv6_iface_scope_id(&sin6->sin6_addr,
509 IP6CB(skb)->iif);
Hannes Frederic Sowabceaa902013-11-18 04:20:45 +0100510 *addr_len = sizeof(*sin6);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 }
512
Neil Horman3b885782009-10-12 13:26:31 -0700513 sock_recv_ts_and_drops(msg, sk, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514
515 if (np->rxopt.all)
Tom Parkin73df66f2013-01-31 01:02:24 +0000516 ip6_datagram_recv_ctl(sk, msg, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517
518 err = copied;
519 if (flags & MSG_TRUNC)
520 err = skb->len;
521
522out_free:
523 skb_free_datagram(sk, skb);
524out:
525 return err;
526
527csum_copy_err:
Herbert Xu3305b802005-12-13 23:16:37 -0800528 skb_kill_datagram(sk, skb, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529
530 /* Error for blocking case is chosen to masquerade
531 as some normal condition.
532 */
533 err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
Herbert Xu3305b802005-12-13 23:16:37 -0800534 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535}
536
David S. Miller4c9483b2011-03-12 16:22:43 -0500537static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
Herbert Xu357b40a2005-04-19 22:30:14 -0700538 struct raw6_sock *rp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539{
540 struct sk_buff *skb;
541 int err = 0;
Herbert Xu357b40a2005-04-19 22:30:14 -0700542 int offset;
543 int len;
Herbert Xu679a8732005-05-03 14:24:36 -0700544 int total_len;
Al Viro868c86b2006-11-14 21:35:48 -0800545 __wsum tmp_csum;
546 __sum16 csum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547
548 if (!rp->checksum)
549 goto send;
550
551 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
552 goto out;
553
Herbert Xu357b40a2005-04-19 22:30:14 -0700554 offset = rp->offset;
Steffen Klassert299b0762011-10-11 01:43:33 +0000555 total_len = inet_sk(sk)->cork.base.length;
Herbert Xu679a8732005-05-03 14:24:36 -0700556 if (offset >= total_len - 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 err = -EINVAL;
Herbert Xu357b40a2005-04-19 22:30:14 -0700558 ip6_flush_pending_frames(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 goto out;
560 }
561
562 /* should be check HW csum miyazawa */
563 if (skb_queue_len(&sk->sk_write_queue) == 1) {
564 /*
565 * Only one fragment on the socket.
566 */
567 tmp_csum = skb->csum;
568 } else {
Herbert Xu357b40a2005-04-19 22:30:14 -0700569 struct sk_buff *csum_skb = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 tmp_csum = 0;
571
572 skb_queue_walk(&sk->sk_write_queue, skb) {
573 tmp_csum = csum_add(tmp_csum, skb->csum);
Herbert Xu357b40a2005-04-19 22:30:14 -0700574
575 if (csum_skb)
576 continue;
577
Arnaldo Carvalho de Meloea2ae172007-04-25 17:55:53 -0700578 len = skb->len - skb_transport_offset(skb);
Herbert Xu357b40a2005-04-19 22:30:14 -0700579 if (offset >= len) {
580 offset -= len;
581 continue;
582 }
583
584 csum_skb = skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 }
Herbert Xu357b40a2005-04-19 22:30:14 -0700586
587 skb = csum_skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 }
589
Arnaldo Carvalho de Meloea2ae172007-04-25 17:55:53 -0700590 offset += skb_transport_offset(skb);
Herbert Xu357b40a2005-04-19 22:30:14 -0700591 if (skb_copy_bits(skb, offset, &csum, 2))
592 BUG();
593
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 /* in case cksum was not initialized */
Herbert Xu357b40a2005-04-19 22:30:14 -0700595 if (unlikely(csum))
Al Viro5f92a732006-11-14 21:36:54 -0800596 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597
David S. Miller4c9483b2011-03-12 16:22:43 -0500598 csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr,
599 total_len, fl6->flowi6_proto, tmp_csum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600
David S. Miller4c9483b2011-03-12 16:22:43 -0500601 if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP)
Al Virof6ab0282006-11-16 02:36:50 -0800602 csum = CSUM_MANGLED_0;
Herbert Xu357b40a2005-04-19 22:30:14 -0700603
Herbert Xu357b40a2005-04-19 22:30:14 -0700604 if (skb_store_bits(skb, offset, &csum, 2))
605 BUG();
606
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607send:
608 err = ip6_push_pending_frames(sk);
609out:
610 return err;
611}
612
613static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
David S. Miller4c9483b2011-03-12 16:22:43 -0500614 struct flowi6 *fl6, struct dst_entry **dstp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 unsigned int flags)
616{
Herbert Xu3320da82005-04-19 22:32:22 -0700617 struct ipv6_pinfo *np = inet6_sk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 struct ipv6hdr *iph;
619 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 int err;
Eric Dumazet1789a642010-06-03 22:23:57 +0000621 struct rt6_info *rt = (struct rt6_info *)*dstp;
Herbert Xua7ae1992011-11-18 02:20:04 +0000622 int hlen = LL_RESERVED_SPACE(rt->dst.dev);
623 int tlen = rt->dst.dev->needed_tailroom;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624
Changli Gaod8d1f302010-06-10 23:31:35 -0700625 if (length > rt->dst.dev->mtu) {
David S. Miller4c9483b2011-03-12 16:22:43 -0500626 ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 return -EMSGSIZE;
628 }
629 if (flags&MSG_PROBE)
630 goto out;
631
Johannes Bergf5184d22008-05-12 20:48:31 -0700632 skb = sock_alloc_send_skb(sk,
Herbert Xua7ae1992011-11-18 02:20:04 +0000633 length + hlen + tlen + 15,
Johannes Bergf5184d22008-05-12 20:48:31 -0700634 flags & MSG_DONTWAIT, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 if (skb == NULL)
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900636 goto error;
Herbert Xua7ae1992011-11-18 02:20:04 +0000637 skb_reserve(skb, hlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638
Hannes Frederic Sowa9c9c9ad2013-08-26 12:31:23 +0200639 skb->protocol = htons(ETH_P_IPV6);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 skb->priority = sk->sk_priority;
Laszlo Attila Toth4a19ec52008-01-30 19:08:16 -0800641 skb->mark = sk->sk_mark;
Changli Gaod8d1f302010-06-10 23:31:35 -0700642 skb_dst_set(skb, &rt->dst);
Eric Dumazet1789a642010-06-03 22:23:57 +0000643 *dstp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644
Arnaldo Carvalho de Melo1ced98e2007-03-10 19:57:15 -0300645 skb_put(skb, length);
646 skb_reset_network_header(skb);
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700647 iph = ipv6_hdr(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648
649 skb->ip_summed = CHECKSUM_NONE;
650
Arnaldo Carvalho de Melob0e380b2007-04-10 21:21:55 -0700651 skb->transport_header = skb->network_header;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 err = memcpy_fromiovecend((void *)iph, from, 0, length);
653 if (err)
654 goto error_fault;
655
Neil Hormanedf391f2009-04-27 02:45:02 -0700656 IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
Jan Engelhardtb2e0b382010-03-23 04:09:07 +0100657 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL,
Changli Gaod8d1f302010-06-10 23:31:35 -0700658 rt->dst.dev, dst_output);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 if (err > 0)
Eric Dumazet6ce9e7b2009-09-02 18:05:33 -0700660 err = net_xmit_errno(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 if (err)
662 goto error;
663out:
664 return 0;
665
666error_fault:
667 err = -EFAULT;
668 kfree_skb(skb);
669error:
Denis V. Lunev3bd653c2008-10-08 10:54:51 -0700670 IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
Eric Dumazet6ce9e7b2009-09-02 18:05:33 -0700671 if (err == -ENOBUFS && !np->recverr)
672 err = 0;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900673 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674}
675
David S. Miller4c9483b2011-03-12 16:22:43 -0500676static int rawv6_probe_proto_opt(struct flowi6 *fl6, struct msghdr *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677{
678 struct iovec *iov;
679 u8 __user *type = NULL;
680 u8 __user *code = NULL;
Masahide NAKAMURA6e8f4d42006-08-23 20:36:47 -0700681 u8 len = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 int probed = 0;
683 int i;
684
685 if (!msg->msg_iov)
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800686 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687
688 for (i = 0; i < msg->msg_iovlen; i++) {
689 iov = &msg->msg_iov[i];
690 if (!iov)
691 continue;
692
David S. Miller4c9483b2011-03-12 16:22:43 -0500693 switch (fl6->flowi6_proto) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 case IPPROTO_ICMPV6:
695 /* check if one-byte field is readable or not. */
696 if (iov->iov_base && iov->iov_len < 1)
697 break;
698
699 if (!type) {
700 type = iov->iov_base;
701 /* check if code field is readable or not. */
702 if (iov->iov_len > 1)
703 code = type + 1;
704 } else if (!code)
705 code = iov->iov_base;
706
707 if (type && code) {
David S. Miller1958b852011-03-12 16:36:19 -0500708 if (get_user(fl6->fl6_icmp_type, type) ||
709 get_user(fl6->fl6_icmp_code, code))
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800710 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 probed = 1;
712 }
713 break;
Masahide NAKAMURA6e8f4d42006-08-23 20:36:47 -0700714 case IPPROTO_MH:
715 if (iov->iov_base && iov->iov_len < 1)
716 break;
717 /* check if type field is readable or not. */
718 if (iov->iov_len > 2 - len) {
719 u8 __user *p = iov->iov_base;
David S. Miller1958b852011-03-12 16:36:19 -0500720 if (get_user(fl6->fl6_mh_type, &p[2 - len]))
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800721 return -EFAULT;
Masahide NAKAMURA6e8f4d42006-08-23 20:36:47 -0700722 probed = 1;
723 } else
724 len += iov->iov_len;
725
726 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 default:
728 probed = 1;
729 break;
730 }
731 if (probed)
732 break;
733 }
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800734 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735}
736
737static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
738 struct msghdr *msg, size_t len)
739{
740 struct ipv6_txoptions opt_space;
Steffen Hurrle342dfc32014-01-17 22:53:15 +0100741 DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
Arnaud Ebalard20c59de2010-06-01 21:35:01 +0000742 struct in6_addr *daddr, *final_p, final;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 struct inet_sock *inet = inet_sk(sk);
744 struct ipv6_pinfo *np = inet6_sk(sk);
745 struct raw6_sock *rp = raw6_sk(sk);
746 struct ipv6_txoptions *opt = NULL;
747 struct ip6_flowlabel *flowlabel = NULL;
748 struct dst_entry *dst = NULL;
David S. Miller4c9483b2011-03-12 16:22:43 -0500749 struct flowi6 fl6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 int addr_len = msg->msg_namelen;
751 int hlimit = -1;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900752 int tclass = -1;
Brian Haley13b52cd2010-04-23 11:26:08 +0000753 int dontfrag = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 u16 proto;
755 int err;
756
757 /* Rough check on arithmetic overflow,
YOSHIFUJI Hideakib59e1392007-03-30 14:45:35 -0700758 better check is made in ip6_append_data().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 */
YOSHIFUJI Hideakib59e1392007-03-30 14:45:35 -0700760 if (len > INT_MAX)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 return -EMSGSIZE;
762
763 /* Mirror BSD error message compatibility */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900764 if (msg->msg_flags & MSG_OOB)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765 return -EOPNOTSUPP;
766
767 /*
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900768 * Get and verify the address.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 */
David S. Miller4c9483b2011-03-12 16:22:43 -0500770 memset(&fl6, 0, sizeof(fl6));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771
David S. Miller4c9483b2011-03-12 16:22:43 -0500772 fl6.flowi6_mark = sk->sk_mark;
Laszlo Attila Toth4a19ec52008-01-30 19:08:16 -0800773
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 if (sin6) {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900775 if (addr_len < SIN6_LEN_RFC2133)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 return -EINVAL;
777
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900778 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
Eric Dumazeta02cec22010-09-22 20:43:57 +0000779 return -EAFNOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780
781 /* port is the proto value [0..255] carried in nexthdr */
782 proto = ntohs(sin6->sin6_port);
783
784 if (!proto)
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000785 proto = inet->inet_num;
786 else if (proto != inet->inet_num)
Eric Dumazeta02cec22010-09-22 20:43:57 +0000787 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788
789 if (proto > 255)
Eric Dumazeta02cec22010-09-22 20:43:57 +0000790 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791
792 daddr = &sin6->sin6_addr;
793 if (np->sndflow) {
David S. Miller4c9483b2011-03-12 16:22:43 -0500794 fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
795 if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
796 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 if (flowlabel == NULL)
798 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 }
800 }
801
802 /*
803 * Otherwise it will be difficult to maintain
804 * sk->sk_dst_cache.
805 */
806 if (sk->sk_state == TCP_ESTABLISHED &&
Eric Dumazetefe42082013-10-03 15:42:29 -0700807 ipv6_addr_equal(daddr, &sk->sk_v6_daddr))
808 daddr = &sk->sk_v6_daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809
810 if (addr_len >= sizeof(struct sockaddr_in6) &&
811 sin6->sin6_scope_id &&
Hannes Frederic Sowa842df072013-03-08 02:07:19 +0000812 __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr)))
David S. Miller4c9483b2011-03-12 16:22:43 -0500813 fl6.flowi6_oif = sin6->sin6_scope_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 } else {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900815 if (sk->sk_state != TCP_ESTABLISHED)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 return -EDESTADDRREQ;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900817
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000818 proto = inet->inet_num;
Eric Dumazetefe42082013-10-03 15:42:29 -0700819 daddr = &sk->sk_v6_daddr;
David S. Miller4c9483b2011-03-12 16:22:43 -0500820 fl6.flowlabel = np->flow_label;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 }
822
David S. Miller4c9483b2011-03-12 16:22:43 -0500823 if (fl6.flowi6_oif == 0)
824 fl6.flowi6_oif = sk->sk_bound_dev_if;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825
826 if (msg->msg_controllen) {
827 opt = &opt_space;
828 memset(opt, 0, sizeof(struct ipv6_txoptions));
829 opt->tot_len = sizeof(struct ipv6_txoptions);
830
Tom Parkin73df66f2013-01-31 01:02:24 +0000831 err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt,
832 &hlimit, &tclass, &dontfrag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833 if (err < 0) {
834 fl6_sock_release(flowlabel);
835 return err;
836 }
David S. Miller4c9483b2011-03-12 16:22:43 -0500837 if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
838 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 if (flowlabel == NULL)
840 return -EINVAL;
841 }
842 if (!(opt->opt_nflen|opt->opt_flen))
843 opt = NULL;
844 }
845 if (opt == NULL)
846 opt = np->opt;
YOSHIFUJI Hideakidf9890c2005-11-20 12:23:18 +0900847 if (flowlabel)
848 opt = fl6_merge_options(&opt_space, flowlabel, opt);
849 opt = ipv6_fixup_options(&opt_space, opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850
David S. Miller4c9483b2011-03-12 16:22:43 -0500851 fl6.flowi6_proto = proto;
852 err = rawv6_probe_proto_opt(&fl6, msg);
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800853 if (err)
854 goto out;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900855
Brian Haley876c7f42008-04-11 00:38:24 -0400856 if (!ipv6_addr_any(daddr))
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000857 fl6.daddr = *daddr;
Brian Haley876c7f42008-04-11 00:38:24 -0400858 else
David S. Miller4c9483b2011-03-12 16:22:43 -0500859 fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
860 if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000861 fl6.saddr = np->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862
David S. Miller4c9483b2011-03-12 16:22:43 -0500863 final_p = fl6_update_dst(&fl6, opt, &final);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864
David S. Miller4c9483b2011-03-12 16:22:43 -0500865 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
866 fl6.flowi6_oif = np->mcast_oif;
Erich E. Hooverc4062df2012-02-08 09:11:08 +0000867 else if (!fl6.flowi6_oif)
868 fl6.flowi6_oif = np->ucast_oif;
David S. Miller4c9483b2011-03-12 16:22:43 -0500869 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870
Steffen Klassert0e0d44a2013-08-28 08:04:14 +0200871 dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
David S. Miller68d0c6d2011-03-01 13:19:07 -0800872 if (IS_ERR(dst)) {
873 err = PTR_ERR(dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 goto out;
David S. Miller14e50e52007-05-24 18:17:54 -0700875 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876 if (hlimit < 0) {
David S. Miller4c9483b2011-03-12 16:22:43 -0500877 if (ipv6_addr_is_multicast(&fl6.daddr))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 hlimit = np->mcast_hops;
879 else
880 hlimit = np->hop_limit;
881 if (hlimit < 0)
YOSHIFUJI Hideaki6b75d092008-03-10 06:00:30 -0400882 hlimit = ip6_dst_hoplimit(dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 }
884
Gerrit Renkere651f032009-08-09 08:12:48 +0000885 if (tclass < 0)
YOSHIFUJI Hideakie012d512006-09-13 20:01:28 -0700886 tclass = np->tclass;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900887
Brian Haley13b52cd2010-04-23 11:26:08 +0000888 if (dontfrag < 0)
889 dontfrag = np->dontfrag;
890
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 if (msg->msg_flags&MSG_CONFIRM)
892 goto do_confirm;
893
894back_from_confirm:
Eric Dumazet1789a642010-06-03 22:23:57 +0000895 if (inet->hdrincl)
David S. Miller4c9483b2011-03-12 16:22:43 -0500896 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl6, &dst, msg->msg_flags);
Eric Dumazet1789a642010-06-03 22:23:57 +0000897 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 lock_sock(sk);
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900899 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
David S. Miller4c9483b2011-03-12 16:22:43 -0500900 len, 0, hlimit, tclass, opt, &fl6, (struct rt6_info*)dst,
Brian Haley13b52cd2010-04-23 11:26:08 +0000901 msg->msg_flags, dontfrag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902
903 if (err)
904 ip6_flush_pending_frames(sk);
905 else if (!(msg->msg_flags & MSG_MORE))
David S. Miller4c9483b2011-03-12 16:22:43 -0500906 err = rawv6_push_pending_frames(sk, &fl6, rp);
YOSHIFUJI Hideaki3ef9d942007-09-14 16:45:40 -0700907 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 }
909done:
Nicolas DICHTEL6d3e85e2006-02-13 15:56:13 -0800910 dst_release(dst);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900911out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912 fl6_sock_release(flowlabel);
913 return err<0?err:len;
914do_confirm:
915 dst_confirm(dst);
916 if (!(msg->msg_flags & MSG_PROBE) || len)
917 goto back_from_confirm;
918 err = 0;
919 goto done;
920}
921
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900922static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 char __user *optval, int optlen)
924{
925 switch (optname) {
926 case ICMPV6_FILTER:
927 if (optlen > sizeof(struct icmp6_filter))
928 optlen = sizeof(struct icmp6_filter);
929 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
930 return -EFAULT;
931 return 0;
932 default:
933 return -ENOPROTOOPT;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700934 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935
936 return 0;
937}
938
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900939static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 char __user *optval, int __user *optlen)
941{
942 int len;
943
944 switch (optname) {
945 case ICMPV6_FILTER:
946 if (get_user(len, optlen))
947 return -EFAULT;
948 if (len < 0)
949 return -EINVAL;
950 if (len > sizeof(struct icmp6_filter))
951 len = sizeof(struct icmp6_filter);
952 if (put_user(len, optlen))
953 return -EFAULT;
954 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
955 return -EFAULT;
956 return 0;
957 default:
958 return -ENOPROTOOPT;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700959 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960
961 return 0;
962}
963
964
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800965static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700966 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967{
968 struct raw6_sock *rp = raw6_sk(sk);
969 int val;
970
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900971 if (get_user(val, (int __user *)optval))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972 return -EFAULT;
973
974 switch (optname) {
Joe Perches207ec0a2011-07-01 09:43:08 +0000975 case IPV6_CHECKSUM:
976 if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
977 level == IPPROTO_IPV6) {
978 /*
979 * RFC3542 tells that IPV6_CHECKSUM socket
980 * option in the IPPROTO_IPV6 level is not
981 * allowed on ICMPv6 sockets.
982 * If you want to set it, use IPPROTO_RAW
983 * level IPV6_CHECKSUM socket option
984 * (Linux extension).
985 */
986 return -EINVAL;
987 }
YOSHIFUJI Hideaki1a98d052008-04-24 21:30:38 -0700988
Joe Perches207ec0a2011-07-01 09:43:08 +0000989 /* You may get strange result with a positive odd offset;
990 RFC2292bis agrees with me. */
991 if (val > 0 && (val&1))
992 return -EINVAL;
993 if (val < 0) {
994 rp->checksum = 0;
995 } else {
996 rp->checksum = 1;
997 rp->offset = val;
998 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999
Joe Perches207ec0a2011-07-01 09:43:08 +00001000 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001
Joe Perches207ec0a2011-07-01 09:43:08 +00001002 default:
1003 return -ENOPROTOOPT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 }
1005}
1006
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001007static int rawv6_setsockopt(struct sock *sk, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -07001008 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009{
Joe Perches207ec0a2011-07-01 09:43:08 +00001010 switch (level) {
1011 case SOL_RAW:
1012 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013
Joe Perches207ec0a2011-07-01 09:43:08 +00001014 case SOL_ICMPV6:
1015 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1016 return -EOPNOTSUPP;
1017 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1018 case SOL_IPV6:
1019 if (optname == IPV6_CHECKSUM)
1020 break;
1021 default:
1022 return ipv6_setsockopt(sk, level, optname, optval, optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001023 }
1024
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001025 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1026}
1027
1028#ifdef CONFIG_COMPAT
1029static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -07001030 char __user *optval, unsigned int optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001031{
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001032 switch (level) {
1033 case SOL_RAW:
1034 break;
1035 case SOL_ICMPV6:
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001036 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001037 return -EOPNOTSUPP;
1038 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1039 case SOL_IPV6:
1040 if (optname == IPV6_CHECKSUM)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001041 break;
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001042 default:
1043 return compat_ipv6_setsockopt(sk, level, optname,
1044 optval, optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001045 }
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001046 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1047}
1048#endif
1049
1050static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1051 char __user *optval, int __user *optlen)
1052{
1053 struct raw6_sock *rp = raw6_sk(sk);
1054 int val, len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055
1056 if (get_user(len,optlen))
1057 return -EFAULT;
1058
1059 switch (optname) {
1060 case IPV6_CHECKSUM:
YOSHIFUJI Hideaki1a98d052008-04-24 21:30:38 -07001061 /*
1062 * We allow getsockopt() for IPPROTO_IPV6-level
1063 * IPV6_CHECKSUM socket option on ICMPv6 sockets
1064 * since RFC3542 is silent about it.
1065 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066 if (rp->checksum == 0)
1067 val = -1;
1068 else
1069 val = rp->offset;
1070 break;
1071
1072 default:
1073 return -ENOPROTOOPT;
1074 }
1075
1076 len = min_t(unsigned int, sizeof(int), len);
1077
1078 if (put_user(len, optlen))
1079 return -EFAULT;
1080 if (copy_to_user(optval,&val,len))
1081 return -EFAULT;
1082 return 0;
1083}
1084
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001085static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1086 char __user *optval, int __user *optlen)
1087{
Joe Perches207ec0a2011-07-01 09:43:08 +00001088 switch (level) {
1089 case SOL_RAW:
1090 break;
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001091
Joe Perches207ec0a2011-07-01 09:43:08 +00001092 case SOL_ICMPV6:
1093 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1094 return -EOPNOTSUPP;
1095 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1096 case SOL_IPV6:
1097 if (optname == IPV6_CHECKSUM)
1098 break;
1099 default:
1100 return ipv6_getsockopt(sk, level, optname, optval, optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001101 }
1102
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001103 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1104}
1105
1106#ifdef CONFIG_COMPAT
1107static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001108 char __user *optval, int __user *optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001109{
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001110 switch (level) {
1111 case SOL_RAW:
1112 break;
1113 case SOL_ICMPV6:
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001114 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001115 return -EOPNOTSUPP;
1116 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1117 case SOL_IPV6:
1118 if (optname == IPV6_CHECKSUM)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001119 break;
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001120 default:
1121 return compat_ipv6_getsockopt(sk, level, optname,
1122 optval, optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001123 }
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001124 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1125}
1126#endif
1127
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1129{
Joe Perches207ec0a2011-07-01 09:43:08 +00001130 switch (cmd) {
1131 case SIOCOUTQ: {
1132 int amount = sk_wmem_alloc_get(sk);
Eric Dumazet31e6d362009-06-17 19:05:41 -07001133
Joe Perches207ec0a2011-07-01 09:43:08 +00001134 return put_user(amount, (int __user *)arg);
1135 }
1136 case SIOCINQ: {
1137 struct sk_buff *skb;
1138 int amount = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139
Joe Perches207ec0a2011-07-01 09:43:08 +00001140 spin_lock_bh(&sk->sk_receive_queue.lock);
1141 skb = skb_peek(&sk->sk_receive_queue);
1142 if (skb != NULL)
Simon Horman29a3cad2013-05-28 20:34:26 +00001143 amount = skb_tail_pointer(skb) -
1144 skb_transport_header(skb);
Joe Perches207ec0a2011-07-01 09:43:08 +00001145 spin_unlock_bh(&sk->sk_receive_queue.lock);
1146 return put_user(amount, (int __user *)arg);
1147 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148
Joe Perches207ec0a2011-07-01 09:43:08 +00001149 default:
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001150#ifdef CONFIG_IPV6_MROUTE
Joe Perches207ec0a2011-07-01 09:43:08 +00001151 return ip6mr_ioctl(sk, cmd, (void __user *)arg);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001152#else
Joe Perches207ec0a2011-07-01 09:43:08 +00001153 return -ENOIOCTLCMD;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001154#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155 }
1156}
1157
David S. Millere2d57762011-02-03 17:59:32 -08001158#ifdef CONFIG_COMPAT
1159static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
1160{
1161 switch (cmd) {
1162 case SIOCOUTQ:
1163 case SIOCINQ:
1164 return -ENOIOCTLCMD;
1165 default:
1166#ifdef CONFIG_IPV6_MROUTE
1167 return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
1168#else
1169 return -ENOIOCTLCMD;
1170#endif
1171 }
1172}
1173#endif
1174
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175static void rawv6_close(struct sock *sk, long timeout)
1176{
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001177 if (inet_sk(sk)->inet_num == IPPROTO_RAW)
Denis V. Lunev725a8ff2008-07-19 00:28:58 -07001178 ip6_ra_control(sk, -1);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001179 ip6mr_sk_done(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180 sk_common_release(sk);
1181}
1182
Brian Haley7d06b2e2008-06-14 17:04:49 -07001183static void raw6_destroy(struct sock *sk)
Denis V. Lunev22dd4852008-06-04 15:16:12 -07001184{
1185 lock_sock(sk);
1186 ip6_flush_pending_frames(sk);
1187 release_sock(sk);
David S. Millerf23d60d2008-06-12 14:47:58 -07001188
Brian Haley7d06b2e2008-06-14 17:04:49 -07001189 inet6_destroy_sock(sk);
Denis V. Lunev22dd4852008-06-04 15:16:12 -07001190}
1191
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192static int rawv6_init_sk(struct sock *sk)
1193{
Masahide NAKAMURAf48d5ff2007-02-07 00:07:39 -08001194 struct raw6_sock *rp = raw6_sk(sk);
1195
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001196 switch (inet_sk(sk)->inet_num) {
Masahide NAKAMURAf48d5ff2007-02-07 00:07:39 -08001197 case IPPROTO_ICMPV6:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198 rp->checksum = 1;
1199 rp->offset = 2;
Masahide NAKAMURAf48d5ff2007-02-07 00:07:39 -08001200 break;
1201 case IPPROTO_MH:
1202 rp->checksum = 1;
1203 rp->offset = 4;
1204 break;
1205 default:
1206 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 }
Eric Dumazeta02cec22010-09-22 20:43:57 +00001208 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209}
1210
1211struct proto rawv6_prot = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001212 .name = "RAWv6",
1213 .owner = THIS_MODULE,
1214 .close = rawv6_close,
Denis V. Lunev22dd4852008-06-04 15:16:12 -07001215 .destroy = raw6_destroy,
Hannes Frederic Sowa82b276c2014-01-20 05:16:39 +01001216 .connect = ip6_datagram_connect_v6_only,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001217 .disconnect = udp_disconnect,
1218 .ioctl = rawv6_ioctl,
1219 .init = rawv6_init_sk,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001220 .setsockopt = rawv6_setsockopt,
1221 .getsockopt = rawv6_getsockopt,
1222 .sendmsg = rawv6_sendmsg,
1223 .recvmsg = rawv6_recvmsg,
1224 .bind = rawv6_bind,
1225 .backlog_rcv = rawv6_rcv_skb,
Pavel Emelyanovfc8717b2008-03-22 16:56:51 -07001226 .hash = raw_hash_sk,
1227 .unhash = raw_unhash_sk,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001228 .obj_size = sizeof(struct raw6_sock),
Pavel Emelyanovfc8717b2008-03-22 16:56:51 -07001229 .h.raw_hash = &raw_v6_hashinfo,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001230#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001231 .compat_setsockopt = compat_rawv6_setsockopt,
1232 .compat_getsockopt = compat_rawv6_getsockopt,
David S. Millere2d57762011-02-03 17:59:32 -08001233 .compat_ioctl = compat_rawv6_ioctl,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001234#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235};
1236
1237#ifdef CONFIG_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238static int raw6_seq_show(struct seq_file *seq, void *v)
1239{
Lorenzo Colitti17ef66af2013-05-31 15:05:48 +00001240 if (v == SEQ_START_TOKEN) {
1241 seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
1242 } else {
1243 struct sock *sp = v;
1244 __u16 srcp = inet_sk(sp)->inet_num;
1245 ip6_dgram_sock_seq_show(seq, v, srcp, 0,
1246 raw_seq_private(seq)->bucket);
1247 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248 return 0;
1249}
1250
Philippe De Muyter56b3d972007-07-10 23:07:31 -07001251static const struct seq_operations raw6_seq_ops = {
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001252 .start = raw_seq_start,
1253 .next = raw_seq_next,
1254 .stop = raw_seq_stop,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255 .show = raw6_seq_show,
1256};
1257
1258static int raw6_seq_open(struct inode *inode, struct file *file)
1259{
Denis V. Lunev3046d762008-01-31 03:48:55 -08001260 return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261}
1262
Arjan van de Ven9a321442007-02-12 00:55:35 -08001263static const struct file_operations raw6_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 .owner = THIS_MODULE,
1265 .open = raw6_seq_open,
1266 .read = seq_read,
1267 .llseek = seq_lseek,
Pavel Emelyanovf51d5992008-01-14 05:35:57 -08001268 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269};
1270
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00001271static int __net_init raw6_init_net(struct net *net)
Pavel Emelyanova308da12008-01-14 05:36:50 -08001272{
Gao fengd4beaa62013-02-18 01:34:54 +00001273 if (!proc_create("raw6", S_IRUGO, net->proc_net, &raw6_seq_fops))
Pavel Emelyanova308da12008-01-14 05:36:50 -08001274 return -ENOMEM;
1275
1276 return 0;
1277}
1278
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00001279static void __net_exit raw6_exit_net(struct net *net)
Pavel Emelyanova308da12008-01-14 05:36:50 -08001280{
Gao fengece31ff2013-02-18 01:34:56 +00001281 remove_proc_entry("raw6", net->proc_net);
Pavel Emelyanova308da12008-01-14 05:36:50 -08001282}
1283
1284static struct pernet_operations raw6_net_ops = {
1285 .init = raw6_init_net,
1286 .exit = raw6_exit_net,
1287};
1288
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289int __init raw6_proc_init(void)
1290{
Pavel Emelyanova308da12008-01-14 05:36:50 -08001291 return register_pernet_subsys(&raw6_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292}
1293
1294void raw6_proc_exit(void)
1295{
Pavel Emelyanova308da12008-01-14 05:36:50 -08001296 unregister_pernet_subsys(&raw6_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297}
1298#endif /* CONFIG_PROC_FS */
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001299
1300/* Same as inet6_dgram_ops, sans udp_poll. */
1301static const struct proto_ops inet6_sockraw_ops = {
1302 .family = PF_INET6,
1303 .owner = THIS_MODULE,
1304 .release = inet6_release,
1305 .bind = inet6_bind,
1306 .connect = inet_dgram_connect, /* ok */
1307 .socketpair = sock_no_socketpair, /* a do nothing */
1308 .accept = sock_no_accept, /* a do nothing */
1309 .getname = inet6_getname,
1310 .poll = datagram_poll, /* ok */
1311 .ioctl = inet6_ioctl, /* must change */
1312 .listen = sock_no_listen, /* ok */
1313 .shutdown = inet_shutdown, /* ok */
1314 .setsockopt = sock_common_setsockopt, /* ok */
1315 .getsockopt = sock_common_getsockopt, /* ok */
1316 .sendmsg = inet_sendmsg, /* ok */
1317 .recvmsg = sock_common_recvmsg, /* ok */
1318 .mmap = sock_no_mmap,
1319 .sendpage = sock_no_sendpage,
1320#ifdef CONFIG_COMPAT
1321 .compat_setsockopt = compat_sock_common_setsockopt,
1322 .compat_getsockopt = compat_sock_common_getsockopt,
1323#endif
1324};
1325
1326static struct inet_protosw rawv6_protosw = {
1327 .type = SOCK_RAW,
1328 .protocol = IPPROTO_IP, /* wild card */
1329 .prot = &rawv6_prot,
1330 .ops = &inet6_sockraw_ops,
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001331 .no_check = UDP_CSUM_DEFAULT,
1332 .flags = INET_PROTOSW_REUSE,
1333};
1334
1335int __init rawv6_init(void)
1336{
1337 int ret;
1338
1339 ret = inet6_register_protosw(&rawv6_protosw);
1340 if (ret)
1341 goto out;
1342out:
1343 return ret;
1344}
1345
Daniel Lezcano09f77092007-12-13 05:34:58 -08001346void rawv6_exit(void)
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001347{
1348 inet6_unregister_protosw(&rawv6_protosw);
1349}