blob: e33576df4658b067ecf33e4c46f951a0b34e52ff [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>
Alex W Slater29778be2015-02-19 21:58:07 +000035#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#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
Ian Morris63159f22015-03-29 14:00:04 +0100175 if (!sk)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 goto out;
177
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900178 net = dev_net(skb->dev);
Duan Jiong43304872014-08-01 09:52:58 +0800179 sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, inet6_iif(skb));
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,
Duan Jiong43304872014-08-01 09:52:58 +0800223 inet6_iif(skb));
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,
Duan Jiong43304872014-08-01 09:52:58 +0800378 inet6_iif(skb)))) {
Pavel Emelyanov69d6da02007-11-19 22:35:57 -0800379 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
Ying Xue1b784142015-03-02 15:37:48 +0800459static int rawv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
460 int noblock, int flags, int *addr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461{
462 struct ipv6_pinfo *np = inet6_sk(sk);
Steffen Hurrle342dfc32014-01-17 22:53:15 +0100463 DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 struct sk_buff *skb;
465 size_t copied;
466 int err;
467
468 if (flags & MSG_OOB)
469 return -EOPNOTSUPP;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900470
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 if (flags & MSG_ERRQUEUE)
Hannes Frederic Sowa85fbaa72013-11-23 00:46:12 +0100472 return ipv6_recv_error(sk, msg, len, addr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
Brian Haley4b340ae2010-04-23 11:26:09 +0000474 if (np->rxpmtu && np->rxopt.bits.rxpmtu)
Hannes Frederic Sowa85fbaa72013-11-23 00:46:12 +0100475 return ipv6_recv_rxpmtu(sk, msg, len, addr_len);
Brian Haley4b340ae2010-04-23 11:26:09 +0000476
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 skb = skb_recv_datagram(sk, flags, noblock, &err);
478 if (!skb)
479 goto out;
480
481 copied = skb->len;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900482 if (copied > len) {
483 copied = len;
484 msg->msg_flags |= MSG_TRUNC;
485 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486
Herbert Xu60476372007-04-09 11:59:39 -0700487 if (skb_csum_unnecessary(skb)) {
David S. Miller51f3d022014-11-05 16:46:40 -0500488 err = skb_copy_datagram_msg(skb, 0, msg, copied);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 } else if (msg->msg_flags&MSG_TRUNC) {
Herbert Xufb286bb2005-11-10 13:01:24 -0800490 if (__skb_checksum_complete(skb))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 goto csum_copy_err;
David S. Miller51f3d022014-11-05 16:46:40 -0500492 err = skb_copy_datagram_msg(skb, 0, msg, copied);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 } else {
Al Viro227158d2014-04-06 18:47:38 -0400494 err = skb_copy_and_csum_datagram_msg(skb, 0, msg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 if (err == -EINVAL)
496 goto csum_copy_err;
497 }
498 if (err)
499 goto out_free;
500
501 /* Copy the address. */
502 if (sin6) {
503 sin6->sin6_family = AF_INET6;
Tetsuo Handaf59fc7f2006-07-25 17:05:35 -0700504 sin6->sin6_port = 0;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000505 sin6->sin6_addr = ipv6_hdr(skb)->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 sin6->sin6_flowinfo = 0;
Hannes Frederic Sowa842df072013-03-08 02:07:19 +0000507 sin6->sin6_scope_id = ipv6_iface_scope_id(&sin6->sin6_addr,
Duan Jiong43304872014-08-01 09:52:58 +0800508 inet6_iif(skb));
Hannes Frederic Sowabceaa902013-11-18 04:20:45 +0100509 *addr_len = sizeof(*sin6);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 }
511
Neil Horman3b885782009-10-12 13:26:31 -0700512 sock_recv_ts_and_drops(msg, sk, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
514 if (np->rxopt.all)
Tom Parkin73df66f2013-01-31 01:02:24 +0000515 ip6_datagram_recv_ctl(sk, msg, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516
517 err = copied;
518 if (flags & MSG_TRUNC)
519 err = skb->len;
520
521out_free:
522 skb_free_datagram(sk, skb);
523out:
524 return err;
525
526csum_copy_err:
Herbert Xu3305b802005-12-13 23:16:37 -0800527 skb_kill_datagram(sk, skb, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528
529 /* Error for blocking case is chosen to masquerade
530 as some normal condition.
531 */
532 err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
Herbert Xu3305b802005-12-13 23:16:37 -0800533 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534}
535
David S. Miller4c9483b2011-03-12 16:22:43 -0500536static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
Herbert Xu357b40a2005-04-19 22:30:14 -0700537 struct raw6_sock *rp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538{
539 struct sk_buff *skb;
540 int err = 0;
Herbert Xu357b40a2005-04-19 22:30:14 -0700541 int offset;
542 int len;
Herbert Xu679a8732005-05-03 14:24:36 -0700543 int total_len;
Al Viro868c86b2006-11-14 21:35:48 -0800544 __wsum tmp_csum;
545 __sum16 csum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546
547 if (!rp->checksum)
548 goto send;
549
Fabian Frederick43728fa2014-10-29 12:57:51 +0100550 skb = skb_peek(&sk->sk_write_queue);
551 if (!skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 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);
Himangi Saraogi8242fc32014-07-12 01:55:38 +0530591 BUG_ON(skb_copy_bits(skb, offset, &csum, 2));
Herbert Xu357b40a2005-04-19 22:30:14 -0700592
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 /* in case cksum was not initialized */
Herbert Xu357b40a2005-04-19 22:30:14 -0700594 if (unlikely(csum))
Al Viro5f92a732006-11-14 21:36:54 -0800595 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596
David S. Miller4c9483b2011-03-12 16:22:43 -0500597 csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr,
598 total_len, fl6->flowi6_proto, tmp_csum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599
David S. Miller4c9483b2011-03-12 16:22:43 -0500600 if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP)
Al Virof6ab0282006-11-16 02:36:50 -0800601 csum = CSUM_MANGLED_0;
Herbert Xu357b40a2005-04-19 22:30:14 -0700602
Himangi Saraogi8242fc32014-07-12 01:55:38 +0530603 BUG_ON(skb_store_bits(skb, offset, &csum, 2));
Herbert Xu357b40a2005-04-19 22:30:14 -0700604
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605send:
606 err = ip6_push_pending_frames(sk);
607out:
608 return err;
609}
610
Al Viroc3c1a7d2014-11-27 19:36:28 -0500611static int rawv6_send_hdrinc(struct sock *sk, struct msghdr *msg, int length,
David S. Miller4c9483b2011-03-12 16:22:43 -0500612 struct flowi6 *fl6, struct dst_entry **dstp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 unsigned int flags)
614{
Herbert Xu3320da82005-04-19 22:32:22 -0700615 struct ipv6_pinfo *np = inet6_sk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 struct ipv6hdr *iph;
617 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 int err;
Eric Dumazet1789a642010-06-03 22:23:57 +0000619 struct rt6_info *rt = (struct rt6_info *)*dstp;
Herbert Xua7ae1992011-11-18 02:20:04 +0000620 int hlen = LL_RESERVED_SPACE(rt->dst.dev);
621 int tlen = rt->dst.dev->needed_tailroom;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622
Changli Gaod8d1f302010-06-10 23:31:35 -0700623 if (length > rt->dst.dev->mtu) {
David S. Miller4c9483b2011-03-12 16:22:43 -0500624 ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 return -EMSGSIZE;
626 }
627 if (flags&MSG_PROBE)
628 goto out;
629
Johannes Bergf5184d22008-05-12 20:48:31 -0700630 skb = sock_alloc_send_skb(sk,
Herbert Xua7ae1992011-11-18 02:20:04 +0000631 length + hlen + tlen + 15,
Johannes Bergf5184d22008-05-12 20:48:31 -0700632 flags & MSG_DONTWAIT, &err);
Ian Morris63159f22015-03-29 14:00:04 +0100633 if (!skb)
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900634 goto error;
Herbert Xua7ae1992011-11-18 02:20:04 +0000635 skb_reserve(skb, hlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636
Hannes Frederic Sowa9c9c9ad2013-08-26 12:31:23 +0200637 skb->protocol = htons(ETH_P_IPV6);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 skb->priority = sk->sk_priority;
Laszlo Attila Toth4a19ec52008-01-30 19:08:16 -0800639 skb->mark = sk->sk_mark;
Changli Gaod8d1f302010-06-10 23:31:35 -0700640 skb_dst_set(skb, &rt->dst);
Eric Dumazet1789a642010-06-03 22:23:57 +0000641 *dstp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642
Arnaldo Carvalho de Melo1ced98e2007-03-10 19:57:15 -0300643 skb_put(skb, length);
644 skb_reset_network_header(skb);
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700645 iph = ipv6_hdr(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646
647 skb->ip_summed = CHECKSUM_NONE;
648
Arnaldo Carvalho de Melob0e380b2007-04-10 21:21:55 -0700649 skb->transport_header = skb->network_header;
Al Viro21226ab2014-11-28 15:48:29 -0500650 err = memcpy_from_msg(iph, msg, length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 if (err)
652 goto error_fault;
653
Neil Hormanedf391f2009-04-27 02:45:02 -0700654 IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
Jan Engelhardtb2e0b382010-03-23 04:09:07 +0100655 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL,
Changli Gaod8d1f302010-06-10 23:31:35 -0700656 rt->dst.dev, dst_output);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 if (err > 0)
Eric Dumazet6ce9e7b2009-09-02 18:05:33 -0700658 err = net_xmit_errno(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 if (err)
660 goto error;
661out:
662 return 0;
663
664error_fault:
665 err = -EFAULT;
666 kfree_skb(skb);
667error:
Denis V. Lunev3bd653c2008-10-08 10:54:51 -0700668 IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
Eric Dumazet6ce9e7b2009-09-02 18:05:33 -0700669 if (err == -ENOBUFS && !np->recverr)
670 err = 0;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900671 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672}
673
Al Viro19e3c662014-11-24 12:10:46 -0500674struct raw6_frag_vec {
675 struct msghdr *msg;
676 int hlen;
677 char c[4];
678};
679
680static int rawv6_probe_proto_opt(struct raw6_frag_vec *rfv, struct flowi6 *fl6)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681{
Al Viro19e3c662014-11-24 12:10:46 -0500682 int err = 0;
683 switch (fl6->flowi6_proto) {
684 case IPPROTO_ICMPV6:
685 rfv->hlen = 2;
686 err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen);
687 if (!err) {
688 fl6->fl6_icmp_type = rfv->c[0];
689 fl6->fl6_icmp_code = rfv->c[1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 }
Al Viro19e3c662014-11-24 12:10:46 -0500691 break;
692 case IPPROTO_MH:
693 rfv->hlen = 4;
694 err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen);
695 if (!err)
696 fl6->fl6_mh_type = rfv->c[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 }
Al Viro19e3c662014-11-24 12:10:46 -0500698 return err;
699}
700
701static int raw6_getfrag(void *from, char *to, int offset, int len, int odd,
702 struct sk_buff *skb)
703{
704 struct raw6_frag_vec *rfv = from;
705
706 if (offset < rfv->hlen) {
707 int copy = min(rfv->hlen - offset, len);
708
709 if (skb->ip_summed == CHECKSUM_PARTIAL)
710 memcpy(to, rfv->c + offset, copy);
711 else
712 skb->csum = csum_block_add(
713 skb->csum,
714 csum_partial_copy_nocheck(rfv->c + offset,
715 to, copy, 0),
716 odd);
717
718 odd = 0;
719 offset += copy;
720 to += copy;
721 len -= copy;
722
723 if (!len)
724 return 0;
725 }
726
727 offset -= rfv->hlen;
728
Al Virof69e6d12014-11-24 13:23:40 -0500729 return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730}
731
Ying Xue1b784142015-03-02 15:37:48 +0800732static int rawv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733{
734 struct ipv6_txoptions opt_space;
Steffen Hurrle342dfc32014-01-17 22:53:15 +0100735 DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
Arnaud Ebalard20c59de2010-06-01 21:35:01 +0000736 struct in6_addr *daddr, *final_p, final;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 struct inet_sock *inet = inet_sk(sk);
738 struct ipv6_pinfo *np = inet6_sk(sk);
739 struct raw6_sock *rp = raw6_sk(sk);
740 struct ipv6_txoptions *opt = NULL;
741 struct ip6_flowlabel *flowlabel = NULL;
742 struct dst_entry *dst = NULL;
Al Viro19e3c662014-11-24 12:10:46 -0500743 struct raw6_frag_vec rfv;
David S. Miller4c9483b2011-03-12 16:22:43 -0500744 struct flowi6 fl6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 int addr_len = msg->msg_namelen;
746 int hlimit = -1;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900747 int tclass = -1;
Brian Haley13b52cd2010-04-23 11:26:08 +0000748 int dontfrag = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 u16 proto;
750 int err;
751
752 /* Rough check on arithmetic overflow,
YOSHIFUJI Hideakib59e1392007-03-30 14:45:35 -0700753 better check is made in ip6_append_data().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 */
YOSHIFUJI Hideakib59e1392007-03-30 14:45:35 -0700755 if (len > INT_MAX)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 return -EMSGSIZE;
757
758 /* Mirror BSD error message compatibility */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900759 if (msg->msg_flags & MSG_OOB)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 return -EOPNOTSUPP;
761
762 /*
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900763 * Get and verify the address.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 */
David S. Miller4c9483b2011-03-12 16:22:43 -0500765 memset(&fl6, 0, sizeof(fl6));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766
David S. Miller4c9483b2011-03-12 16:22:43 -0500767 fl6.flowi6_mark = sk->sk_mark;
Laszlo Attila Toth4a19ec52008-01-30 19:08:16 -0800768
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 if (sin6) {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900770 if (addr_len < SIN6_LEN_RFC2133)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 return -EINVAL;
772
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900773 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
Eric Dumazeta02cec22010-09-22 20:43:57 +0000774 return -EAFNOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775
776 /* port is the proto value [0..255] carried in nexthdr */
777 proto = ntohs(sin6->sin6_port);
778
779 if (!proto)
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000780 proto = inet->inet_num;
781 else if (proto != inet->inet_num)
Eric Dumazeta02cec22010-09-22 20:43:57 +0000782 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783
784 if (proto > 255)
Eric Dumazeta02cec22010-09-22 20:43:57 +0000785 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786
787 daddr = &sin6->sin6_addr;
788 if (np->sndflow) {
David S. Miller4c9483b2011-03-12 16:22:43 -0500789 fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
790 if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
791 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
Ian Morris63159f22015-03-29 14:00:04 +0100792 if (!flowlabel)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 }
795 }
796
797 /*
798 * Otherwise it will be difficult to maintain
799 * sk->sk_dst_cache.
800 */
801 if (sk->sk_state == TCP_ESTABLISHED &&
Eric Dumazetefe42082013-10-03 15:42:29 -0700802 ipv6_addr_equal(daddr, &sk->sk_v6_daddr))
803 daddr = &sk->sk_v6_daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804
805 if (addr_len >= sizeof(struct sockaddr_in6) &&
806 sin6->sin6_scope_id &&
Hannes Frederic Sowa842df072013-03-08 02:07:19 +0000807 __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr)))
David S. Miller4c9483b2011-03-12 16:22:43 -0500808 fl6.flowi6_oif = sin6->sin6_scope_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 } else {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900810 if (sk->sk_state != TCP_ESTABLISHED)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 return -EDESTADDRREQ;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900812
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000813 proto = inet->inet_num;
Eric Dumazetefe42082013-10-03 15:42:29 -0700814 daddr = &sk->sk_v6_daddr;
David S. Miller4c9483b2011-03-12 16:22:43 -0500815 fl6.flowlabel = np->flow_label;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 }
817
David S. Miller4c9483b2011-03-12 16:22:43 -0500818 if (fl6.flowi6_oif == 0)
819 fl6.flowi6_oif = sk->sk_bound_dev_if;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820
821 if (msg->msg_controllen) {
822 opt = &opt_space;
823 memset(opt, 0, sizeof(struct ipv6_txoptions));
824 opt->tot_len = sizeof(struct ipv6_txoptions);
825
Tom Parkin73df66f2013-01-31 01:02:24 +0000826 err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt,
827 &hlimit, &tclass, &dontfrag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 if (err < 0) {
829 fl6_sock_release(flowlabel);
830 return err;
831 }
David S. Miller4c9483b2011-03-12 16:22:43 -0500832 if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
833 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
Ian Morris63159f22015-03-29 14:00:04 +0100834 if (!flowlabel)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 return -EINVAL;
836 }
837 if (!(opt->opt_nflen|opt->opt_flen))
838 opt = NULL;
839 }
Ian Morris63159f22015-03-29 14:00:04 +0100840 if (!opt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 opt = np->opt;
YOSHIFUJI Hideakidf9890c2005-11-20 12:23:18 +0900842 if (flowlabel)
843 opt = fl6_merge_options(&opt_space, flowlabel, opt);
844 opt = ipv6_fixup_options(&opt_space, opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845
David S. Miller4c9483b2011-03-12 16:22:43 -0500846 fl6.flowi6_proto = proto;
Al Viro19e3c662014-11-24 12:10:46 -0500847 rfv.msg = msg;
848 rfv.hlen = 0;
849 err = rawv6_probe_proto_opt(&rfv, &fl6);
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800850 if (err)
851 goto out;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900852
Brian Haley876c7f42008-04-11 00:38:24 -0400853 if (!ipv6_addr_any(daddr))
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000854 fl6.daddr = *daddr;
Brian Haley876c7f42008-04-11 00:38:24 -0400855 else
David S. Miller4c9483b2011-03-12 16:22:43 -0500856 fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
857 if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000858 fl6.saddr = np->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859
David S. Miller4c9483b2011-03-12 16:22:43 -0500860 final_p = fl6_update_dst(&fl6, opt, &final);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861
David S. Miller4c9483b2011-03-12 16:22:43 -0500862 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
863 fl6.flowi6_oif = np->mcast_oif;
Erich E. Hooverc4062df2012-02-08 09:11:08 +0000864 else if (!fl6.flowi6_oif)
865 fl6.flowi6_oif = np->ucast_oif;
David S. Miller4c9483b2011-03-12 16:22:43 -0500866 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867
Steffen Klassert0e0d44a2013-08-28 08:04:14 +0200868 dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
David S. Miller68d0c6d2011-03-01 13:19:07 -0800869 if (IS_ERR(dst)) {
870 err = PTR_ERR(dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 goto out;
David S. Miller14e50e52007-05-24 18:17:54 -0700872 }
Lorenzo Colitti5c986312014-04-29 11:57:34 +0900873 if (hlimit < 0)
874 hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875
Gerrit Renkere651f032009-08-09 08:12:48 +0000876 if (tclass < 0)
YOSHIFUJI Hideakie012d512006-09-13 20:01:28 -0700877 tclass = np->tclass;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900878
Brian Haley13b52cd2010-04-23 11:26:08 +0000879 if (dontfrag < 0)
880 dontfrag = np->dontfrag;
881
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882 if (msg->msg_flags&MSG_CONFIRM)
883 goto do_confirm;
884
885back_from_confirm:
Eric Dumazet1789a642010-06-03 22:23:57 +0000886 if (inet->hdrincl)
Al Viroc3c1a7d2014-11-27 19:36:28 -0500887 err = rawv6_send_hdrinc(sk, msg, len, &fl6, &dst, msg->msg_flags);
Eric Dumazet1789a642010-06-03 22:23:57 +0000888 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889 lock_sock(sk);
Al Viro19e3c662014-11-24 12:10:46 -0500890 err = ip6_append_data(sk, raw6_getfrag, &rfv,
Ian Morris67ba4152014-08-24 21:53:10 +0100891 len, 0, hlimit, tclass, opt, &fl6, (struct rt6_info *)dst,
Brian Haley13b52cd2010-04-23 11:26:08 +0000892 msg->msg_flags, dontfrag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893
894 if (err)
895 ip6_flush_pending_frames(sk);
896 else if (!(msg->msg_flags & MSG_MORE))
David S. Miller4c9483b2011-03-12 16:22:43 -0500897 err = rawv6_push_pending_frames(sk, &fl6, rp);
YOSHIFUJI Hideaki3ef9d942007-09-14 16:45:40 -0700898 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 }
900done:
Nicolas DICHTEL6d3e85e2006-02-13 15:56:13 -0800901 dst_release(dst);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900902out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903 fl6_sock_release(flowlabel);
Ian Morris67ba4152014-08-24 21:53:10 +0100904 return err < 0 ? err : len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905do_confirm:
906 dst_confirm(dst);
907 if (!(msg->msg_flags & MSG_PROBE) || len)
908 goto back_from_confirm;
909 err = 0;
910 goto done;
911}
912
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900913static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 char __user *optval, int optlen)
915{
916 switch (optname) {
917 case ICMPV6_FILTER:
918 if (optlen > sizeof(struct icmp6_filter))
919 optlen = sizeof(struct icmp6_filter);
920 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
921 return -EFAULT;
922 return 0;
923 default:
924 return -ENOPROTOOPT;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700925 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926
927 return 0;
928}
929
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900930static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 char __user *optval, int __user *optlen)
932{
933 int len;
934
935 switch (optname) {
936 case ICMPV6_FILTER:
937 if (get_user(len, optlen))
938 return -EFAULT;
939 if (len < 0)
940 return -EINVAL;
941 if (len > sizeof(struct icmp6_filter))
942 len = sizeof(struct icmp6_filter);
943 if (put_user(len, optlen))
944 return -EFAULT;
945 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
946 return -EFAULT;
947 return 0;
948 default:
949 return -ENOPROTOOPT;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700950 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951
952 return 0;
953}
954
955
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800956static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700957 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958{
959 struct raw6_sock *rp = raw6_sk(sk);
960 int val;
961
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900962 if (get_user(val, (int __user *)optval))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963 return -EFAULT;
964
965 switch (optname) {
Joe Perches207ec0a2011-07-01 09:43:08 +0000966 case IPV6_CHECKSUM:
967 if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
968 level == IPPROTO_IPV6) {
969 /*
970 * RFC3542 tells that IPV6_CHECKSUM socket
971 * option in the IPPROTO_IPV6 level is not
972 * allowed on ICMPv6 sockets.
973 * If you want to set it, use IPPROTO_RAW
974 * level IPV6_CHECKSUM socket option
975 * (Linux extension).
976 */
977 return -EINVAL;
978 }
YOSHIFUJI Hideaki1a98d052008-04-24 21:30:38 -0700979
Joe Perches207ec0a2011-07-01 09:43:08 +0000980 /* You may get strange result with a positive odd offset;
981 RFC2292bis agrees with me. */
982 if (val > 0 && (val&1))
983 return -EINVAL;
984 if (val < 0) {
985 rp->checksum = 0;
986 } else {
987 rp->checksum = 1;
988 rp->offset = val;
989 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990
Joe Perches207ec0a2011-07-01 09:43:08 +0000991 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992
Joe Perches207ec0a2011-07-01 09:43:08 +0000993 default:
994 return -ENOPROTOOPT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995 }
996}
997
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800998static int rawv6_setsockopt(struct sock *sk, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700999 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000{
Joe Perches207ec0a2011-07-01 09:43:08 +00001001 switch (level) {
1002 case SOL_RAW:
1003 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004
Joe Perches207ec0a2011-07-01 09:43:08 +00001005 case SOL_ICMPV6:
1006 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1007 return -EOPNOTSUPP;
1008 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1009 case SOL_IPV6:
1010 if (optname == IPV6_CHECKSUM)
1011 break;
1012 default:
1013 return ipv6_setsockopt(sk, level, optname, optval, optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001014 }
1015
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001016 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1017}
1018
1019#ifdef CONFIG_COMPAT
1020static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -07001021 char __user *optval, unsigned int optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001022{
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001023 switch (level) {
1024 case SOL_RAW:
1025 break;
1026 case SOL_ICMPV6:
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001027 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001028 return -EOPNOTSUPP;
1029 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1030 case SOL_IPV6:
1031 if (optname == IPV6_CHECKSUM)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001032 break;
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001033 default:
1034 return compat_ipv6_setsockopt(sk, level, optname,
1035 optval, optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001036 }
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001037 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1038}
1039#endif
1040
1041static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1042 char __user *optval, int __user *optlen)
1043{
1044 struct raw6_sock *rp = raw6_sk(sk);
1045 int val, len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046
Ian Morris67ba4152014-08-24 21:53:10 +01001047 if (get_user(len, optlen))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048 return -EFAULT;
1049
1050 switch (optname) {
1051 case IPV6_CHECKSUM:
YOSHIFUJI Hideaki1a98d052008-04-24 21:30:38 -07001052 /*
1053 * We allow getsockopt() for IPPROTO_IPV6-level
1054 * IPV6_CHECKSUM socket option on ICMPv6 sockets
1055 * since RFC3542 is silent about it.
1056 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 if (rp->checksum == 0)
1058 val = -1;
1059 else
1060 val = rp->offset;
1061 break;
1062
1063 default:
1064 return -ENOPROTOOPT;
1065 }
1066
1067 len = min_t(unsigned int, sizeof(int), len);
1068
1069 if (put_user(len, optlen))
1070 return -EFAULT;
Ian Morris67ba4152014-08-24 21:53:10 +01001071 if (copy_to_user(optval, &val, len))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 return -EFAULT;
1073 return 0;
1074}
1075
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001076static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1077 char __user *optval, int __user *optlen)
1078{
Joe Perches207ec0a2011-07-01 09:43:08 +00001079 switch (level) {
1080 case SOL_RAW:
1081 break;
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001082
Joe Perches207ec0a2011-07-01 09:43:08 +00001083 case SOL_ICMPV6:
1084 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1085 return -EOPNOTSUPP;
1086 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1087 case SOL_IPV6:
1088 if (optname == IPV6_CHECKSUM)
1089 break;
1090 default:
1091 return ipv6_getsockopt(sk, level, optname, optval, optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001092 }
1093
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001094 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1095}
1096
1097#ifdef CONFIG_COMPAT
1098static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001099 char __user *optval, int __user *optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001100{
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001101 switch (level) {
1102 case SOL_RAW:
1103 break;
1104 case SOL_ICMPV6:
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001105 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001106 return -EOPNOTSUPP;
1107 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1108 case SOL_IPV6:
1109 if (optname == IPV6_CHECKSUM)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001110 break;
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001111 default:
1112 return compat_ipv6_getsockopt(sk, level, optname,
1113 optval, optlen);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001114 }
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001115 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1116}
1117#endif
1118
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1120{
Joe Perches207ec0a2011-07-01 09:43:08 +00001121 switch (cmd) {
1122 case SIOCOUTQ: {
1123 int amount = sk_wmem_alloc_get(sk);
Eric Dumazet31e6d362009-06-17 19:05:41 -07001124
Joe Perches207ec0a2011-07-01 09:43:08 +00001125 return put_user(amount, (int __user *)arg);
1126 }
1127 case SIOCINQ: {
1128 struct sk_buff *skb;
1129 int amount = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130
Joe Perches207ec0a2011-07-01 09:43:08 +00001131 spin_lock_bh(&sk->sk_receive_queue.lock);
1132 skb = skb_peek(&sk->sk_receive_queue);
1133 if (skb != NULL)
Simon Horman29a3cad2013-05-28 20:34:26 +00001134 amount = skb_tail_pointer(skb) -
1135 skb_transport_header(skb);
Joe Perches207ec0a2011-07-01 09:43:08 +00001136 spin_unlock_bh(&sk->sk_receive_queue.lock);
1137 return put_user(amount, (int __user *)arg);
1138 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139
Joe Perches207ec0a2011-07-01 09:43:08 +00001140 default:
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001141#ifdef CONFIG_IPV6_MROUTE
Joe Perches207ec0a2011-07-01 09:43:08 +00001142 return ip6mr_ioctl(sk, cmd, (void __user *)arg);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001143#else
Joe Perches207ec0a2011-07-01 09:43:08 +00001144 return -ENOIOCTLCMD;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001145#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 }
1147}
1148
David S. Millere2d57762011-02-03 17:59:32 -08001149#ifdef CONFIG_COMPAT
1150static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
1151{
1152 switch (cmd) {
1153 case SIOCOUTQ:
1154 case SIOCINQ:
1155 return -ENOIOCTLCMD;
1156 default:
1157#ifdef CONFIG_IPV6_MROUTE
1158 return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
1159#else
1160 return -ENOIOCTLCMD;
1161#endif
1162 }
1163}
1164#endif
1165
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166static void rawv6_close(struct sock *sk, long timeout)
1167{
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001168 if (inet_sk(sk)->inet_num == IPPROTO_RAW)
Denis V. Lunev725a8ff2008-07-19 00:28:58 -07001169 ip6_ra_control(sk, -1);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001170 ip6mr_sk_done(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171 sk_common_release(sk);
1172}
1173
Brian Haley7d06b2e2008-06-14 17:04:49 -07001174static void raw6_destroy(struct sock *sk)
Denis V. Lunev22dd4852008-06-04 15:16:12 -07001175{
1176 lock_sock(sk);
1177 ip6_flush_pending_frames(sk);
1178 release_sock(sk);
David S. Millerf23d60d2008-06-12 14:47:58 -07001179
Brian Haley7d06b2e2008-06-14 17:04:49 -07001180 inet6_destroy_sock(sk);
Denis V. Lunev22dd4852008-06-04 15:16:12 -07001181}
1182
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183static int rawv6_init_sk(struct sock *sk)
1184{
Masahide NAKAMURAf48d5ff2007-02-07 00:07:39 -08001185 struct raw6_sock *rp = raw6_sk(sk);
1186
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001187 switch (inet_sk(sk)->inet_num) {
Masahide NAKAMURAf48d5ff2007-02-07 00:07:39 -08001188 case IPPROTO_ICMPV6:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189 rp->checksum = 1;
1190 rp->offset = 2;
Masahide NAKAMURAf48d5ff2007-02-07 00:07:39 -08001191 break;
1192 case IPPROTO_MH:
1193 rp->checksum = 1;
1194 rp->offset = 4;
1195 break;
1196 default:
1197 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198 }
Eric Dumazeta02cec22010-09-22 20:43:57 +00001199 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200}
1201
1202struct proto rawv6_prot = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001203 .name = "RAWv6",
1204 .owner = THIS_MODULE,
1205 .close = rawv6_close,
Denis V. Lunev22dd4852008-06-04 15:16:12 -07001206 .destroy = raw6_destroy,
Hannes Frederic Sowa82b276c2014-01-20 05:16:39 +01001207 .connect = ip6_datagram_connect_v6_only,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001208 .disconnect = udp_disconnect,
1209 .ioctl = rawv6_ioctl,
1210 .init = rawv6_init_sk,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001211 .setsockopt = rawv6_setsockopt,
1212 .getsockopt = rawv6_getsockopt,
1213 .sendmsg = rawv6_sendmsg,
1214 .recvmsg = rawv6_recvmsg,
1215 .bind = rawv6_bind,
1216 .backlog_rcv = rawv6_rcv_skb,
Pavel Emelyanovfc8717b2008-03-22 16:56:51 -07001217 .hash = raw_hash_sk,
1218 .unhash = raw_unhash_sk,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001219 .obj_size = sizeof(struct raw6_sock),
Pavel Emelyanovfc8717b2008-03-22 16:56:51 -07001220 .h.raw_hash = &raw_v6_hashinfo,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001221#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001222 .compat_setsockopt = compat_rawv6_setsockopt,
1223 .compat_getsockopt = compat_rawv6_getsockopt,
David S. Millere2d57762011-02-03 17:59:32 -08001224 .compat_ioctl = compat_rawv6_ioctl,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001225#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226};
1227
1228#ifdef CONFIG_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229static int raw6_seq_show(struct seq_file *seq, void *v)
1230{
Lorenzo Colitti17ef66af2013-05-31 15:05:48 +00001231 if (v == SEQ_START_TOKEN) {
1232 seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
1233 } else {
1234 struct sock *sp = v;
1235 __u16 srcp = inet_sk(sp)->inet_num;
1236 ip6_dgram_sock_seq_show(seq, v, srcp, 0,
1237 raw_seq_private(seq)->bucket);
1238 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 return 0;
1240}
1241
Philippe De Muyter56b3d972007-07-10 23:07:31 -07001242static const struct seq_operations raw6_seq_ops = {
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001243 .start = raw_seq_start,
1244 .next = raw_seq_next,
1245 .stop = raw_seq_stop,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246 .show = raw6_seq_show,
1247};
1248
1249static int raw6_seq_open(struct inode *inode, struct file *file)
1250{
Denis V. Lunev3046d762008-01-31 03:48:55 -08001251 return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252}
1253
Arjan van de Ven9a321442007-02-12 00:55:35 -08001254static const struct file_operations raw6_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255 .owner = THIS_MODULE,
1256 .open = raw6_seq_open,
1257 .read = seq_read,
1258 .llseek = seq_lseek,
Pavel Emelyanovf51d5992008-01-14 05:35:57 -08001259 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260};
1261
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00001262static int __net_init raw6_init_net(struct net *net)
Pavel Emelyanova308da12008-01-14 05:36:50 -08001263{
Gao fengd4beaa62013-02-18 01:34:54 +00001264 if (!proc_create("raw6", S_IRUGO, net->proc_net, &raw6_seq_fops))
Pavel Emelyanova308da12008-01-14 05:36:50 -08001265 return -ENOMEM;
1266
1267 return 0;
1268}
1269
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00001270static void __net_exit raw6_exit_net(struct net *net)
Pavel Emelyanova308da12008-01-14 05:36:50 -08001271{
Gao fengece31ff2013-02-18 01:34:56 +00001272 remove_proc_entry("raw6", net->proc_net);
Pavel Emelyanova308da12008-01-14 05:36:50 -08001273}
1274
1275static struct pernet_operations raw6_net_ops = {
1276 .init = raw6_init_net,
1277 .exit = raw6_exit_net,
1278};
1279
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280int __init raw6_proc_init(void)
1281{
Pavel Emelyanova308da12008-01-14 05:36:50 -08001282 return register_pernet_subsys(&raw6_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283}
1284
1285void raw6_proc_exit(void)
1286{
Pavel Emelyanova308da12008-01-14 05:36:50 -08001287 unregister_pernet_subsys(&raw6_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288}
1289#endif /* CONFIG_PROC_FS */
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001290
1291/* Same as inet6_dgram_ops, sans udp_poll. */
1292static const struct proto_ops inet6_sockraw_ops = {
1293 .family = PF_INET6,
1294 .owner = THIS_MODULE,
1295 .release = inet6_release,
1296 .bind = inet6_bind,
1297 .connect = inet_dgram_connect, /* ok */
1298 .socketpair = sock_no_socketpair, /* a do nothing */
1299 .accept = sock_no_accept, /* a do nothing */
1300 .getname = inet6_getname,
1301 .poll = datagram_poll, /* ok */
1302 .ioctl = inet6_ioctl, /* must change */
1303 .listen = sock_no_listen, /* ok */
1304 .shutdown = inet_shutdown, /* ok */
1305 .setsockopt = sock_common_setsockopt, /* ok */
1306 .getsockopt = sock_common_getsockopt, /* ok */
1307 .sendmsg = inet_sendmsg, /* ok */
1308 .recvmsg = sock_common_recvmsg, /* ok */
1309 .mmap = sock_no_mmap,
1310 .sendpage = sock_no_sendpage,
1311#ifdef CONFIG_COMPAT
1312 .compat_setsockopt = compat_sock_common_setsockopt,
1313 .compat_getsockopt = compat_sock_common_getsockopt,
1314#endif
1315};
1316
1317static struct inet_protosw rawv6_protosw = {
1318 .type = SOCK_RAW,
1319 .protocol = IPPROTO_IP, /* wild card */
1320 .prot = &rawv6_prot,
1321 .ops = &inet6_sockraw_ops,
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001322 .flags = INET_PROTOSW_REUSE,
1323};
1324
1325int __init rawv6_init(void)
1326{
1327 int ret;
1328
1329 ret = inet6_register_protosw(&rawv6_protosw);
1330 if (ret)
1331 goto out;
1332out:
1333 return ret;
1334}
1335
Daniel Lezcano09f77092007-12-13 05:34:58 -08001336void rawv6_exit(void)
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001337{
1338 inet6_unregister_protosw(&rawv6_protosw);
1339}