blob: a9895e15ee9c270f13842121b7dc66ed97a71135 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * IPv6 BSD socket options interface
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 * Based on linux/net/ipv4/ip_sockglue.c
9 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * FIXME: Make the setsockopt code POSIX compliant: That is
16 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 * o Truncate getsockopt returns
18 * o Return an optlen of the truncated length if need be
19 *
20 * Changes:
21 * David L Stevens <dlstevens@us.ibm.com>:
22 * - added multicast source filtering API for MLDv2
23 */
24
25#include <linux/module.h>
Randy Dunlap4fc268d2006-01-11 12:17:47 -080026#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/errno.h>
28#include <linux/types.h>
29#include <linux/socket.h>
30#include <linux/sockios.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <linux/net.h>
32#include <linux/in6.h>
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090033#include <linux/mroute6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <linux/netdevice.h>
35#include <linux/if_arp.h>
36#include <linux/init.h>
37#include <linux/sysctl.h>
38#include <linux/netfilter.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090039#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
41#include <net/sock.h>
42#include <net/snmp.h>
43#include <net/ipv6.h>
44#include <net/ndisc.h>
45#include <net/protocol.h>
46#include <net/transp_v6.h>
47#include <net/ip6_route.h>
48#include <net/addrconf.h>
49#include <net/inet_common.h>
50#include <net/tcp.h>
51#include <net/udp.h>
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080052#include <net/udplite.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#include <net/xfrm.h>
David L Stevensdae50292008-04-27 01:06:07 -070054#include <net/compat.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
56#include <asm/uaccess.h>
57
Linus Torvalds1da177e2005-04-16 15:20:36 -070058struct ip6_ra_chain *ip6_ra_chain;
59DEFINE_RWLOCK(ip6_ra_lock);
60
Denis V. Lunev725a8ff2008-07-19 00:28:58 -070061int ip6_ra_control(struct sock *sk, int sel)
Linus Torvalds1da177e2005-04-16 15:20:36 -070062{
63 struct ip6_ra_chain *ra, *new_ra, **rap;
64
65 /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
Eric Dumazetc720c7e2009-10-15 06:30:45 +000066 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num != IPPROTO_RAW)
YOSHIFUJI Hideaki17176992008-06-12 03:27:26 +090067 return -ENOPROTOOPT;
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Ian Morris67ba4152014-08-24 21:53:10 +010069 new_ra = (sel >= 0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
71 write_lock_bh(&ip6_ra_lock);
Ian Morris67ba4152014-08-24 21:53:10 +010072 for (rap = &ip6_ra_chain; (ra = *rap) != NULL; rap = &ra->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 if (ra->sk == sk) {
Ian Morris67ba4152014-08-24 21:53:10 +010074 if (sel >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 write_unlock_bh(&ip6_ra_lock);
Jesper Juhla51482b2005-11-08 09:41:34 -080076 kfree(new_ra);
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 return -EADDRINUSE;
78 }
79
80 *rap = ra->next;
81 write_unlock_bh(&ip6_ra_lock);
82
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 sock_put(sk);
84 kfree(ra);
85 return 0;
86 }
87 }
Ian Morris63159f22015-03-29 14:00:04 +010088 if (!new_ra) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 write_unlock_bh(&ip6_ra_lock);
90 return -ENOBUFS;
91 }
92 new_ra->sk = sk;
93 new_ra->sel = sel;
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 new_ra->next = ra;
95 *rap = new_ra;
96 sock_hold(sk);
97 write_unlock_bh(&ip6_ra_lock);
98 return 0;
99}
100
YOSHIFUJI Hideakie7712f12008-04-13 23:21:52 -0700101static
102struct ipv6_txoptions *ipv6_update_options(struct sock *sk,
103 struct ipv6_txoptions *opt)
104{
105 if (inet_sk(sk)->is_icsk) {
106 if (opt &&
107 !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000108 inet_sk(sk)->inet_daddr != LOOPBACK4_IPV6) {
YOSHIFUJI Hideakie7712f12008-04-13 23:21:52 -0700109 struct inet_connection_sock *icsk = inet_csk(sk);
110 icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen;
111 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
112 }
YOSHIFUJI Hideakie7712f12008-04-13 23:21:52 -0700113 }
Eric Dumazet45f6fad2015-11-29 19:37:57 -0800114 opt = xchg((__force struct ipv6_txoptions **)&inet6_sk(sk)->opt,
115 opt);
YOSHIFUJI Hideakie7712f12008-04-13 23:21:52 -0700116 sk_dst_reset(sk);
117
118 return opt;
119}
120
Marcelo Ricardo Leitnerbaf606d2015-03-18 14:50:42 -0300121static bool setsockopt_needs_rtnl(int optname)
122{
123 switch (optname) {
124 case IPV6_ADD_MEMBERSHIP:
125 case IPV6_DROP_MEMBERSHIP:
Marcelo Ricardo Leitnerc4a68532015-03-20 11:37:17 -0300126 case IPV6_JOIN_ANYCAST:
127 case IPV6_LEAVE_ANYCAST:
Marcelo Ricardo Leitnerbaf606d2015-03-18 14:50:42 -0300128 case MCAST_JOIN_GROUP:
129 case MCAST_LEAVE_GROUP:
Marcelo Ricardo Leitner54ff9ef2015-03-18 14:50:43 -0300130 case MCAST_JOIN_SOURCE_GROUP:
131 case MCAST_LEAVE_SOURCE_GROUP:
132 case MCAST_BLOCK_SOURCE:
133 case MCAST_UNBLOCK_SOURCE:
134 case MCAST_MSFILTER:
Marcelo Ricardo Leitnerbaf606d2015-03-18 14:50:42 -0300135 return true;
136 }
137 return false;
138}
139
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800140static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700141 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142{
143 struct ipv6_pinfo *np = inet6_sk(sk);
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900144 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 int val, valbool;
146 int retv = -ENOPROTOOPT;
Marcelo Ricardo Leitnerbaf606d2015-03-18 14:50:42 -0300147 bool needs_rtnl = setsockopt_needs_rtnl(optname);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
Ian Morris63159f22015-03-29 14:00:04 +0100149 if (!optval)
Ian Morris67ba4152014-08-24 21:53:10 +0100150 val = 0;
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900151 else {
152 if (optlen >= sizeof(int)) {
153 if (get_user(val, (int __user *) optval))
154 return -EFAULT;
155 } else
156 val = 0;
157 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
Ian Morris67ba4152014-08-24 21:53:10 +0100159 valbool = (val != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900161 if (ip6_mroute_opt(optname))
162 return ip6_mroute_setsockopt(sk, optname, optval, optlen);
163
Marcelo Ricardo Leitnerbaf606d2015-03-18 14:50:42 -0300164 if (needs_rtnl)
165 rtnl_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 lock_sock(sk);
167
168 switch (optname) {
169
170 case IPV6_ADDRFORM:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900171 if (optlen < sizeof(int))
172 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 if (val == PF_INET) {
174 struct ipv6_txoptions *opt;
175 struct sk_buff *pktopt;
176
Denis V. Lunev49d074f2008-06-04 15:49:06 +0400177 if (sk->sk_type == SOCK_RAW)
178 break;
179
Denis V. Lunev9596cc822008-06-04 15:49:08 +0400180 if (sk->sk_protocol == IPPROTO_UDP ||
181 sk->sk_protocol == IPPROTO_UDPLITE) {
182 struct udp_sock *up = udp_sk(sk);
183 if (up->pending == AF_INET6) {
184 retv = -EBUSY;
185 break;
186 }
187 } else if (sk->sk_protocol != IPPROTO_TCP)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 break;
189
190 if (sk->sk_state != TCP_ESTABLISHED) {
191 retv = -ENOTCONN;
192 break;
193 }
194
195 if (ipv6_only_sock(sk) ||
Eric Dumazetefe42082013-10-03 15:42:29 -0700196 !ipv6_addr_v4mapped(&sk->sk_v6_daddr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 retv = -EADDRNOTAVAIL;
198 break;
199 }
200
201 fl6_free_socklist(sk);
202 ipv6_sock_mc_close(sk);
203
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700204 /*
205 * Sock is moving from IPv6 to IPv4 (sk_prot), so
206 * remove it from the refcnt debug socks count in the
207 * original family...
208 */
209 sk_refcnt_debug_dec(sk);
210
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 if (sk->sk_protocol == IPPROTO_TCP) {
Arnaldo Carvalho de Melod83d8462005-12-13 23:26:10 -0800212 struct inet_connection_sock *icsk = inet_csk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 local_bh_disable();
Pavel Emelyanovc29a0bc2008-03-31 19:41:46 -0700214 sock_prot_inuse_add(net, sk->sk_prot, -1);
215 sock_prot_inuse_add(net, &tcp_prot, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 local_bh_enable();
217 sk->sk_prot = &tcp_prot;
Arnaldo Carvalho de Melod83d8462005-12-13 23:26:10 -0800218 icsk->icsk_af_ops = &ipv4_specific;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 sk->sk_socket->ops = &inet_stream_ops;
220 sk->sk_family = PF_INET;
Arnaldo Carvalho de Melod83d8462005-12-13 23:26:10 -0800221 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 } else {
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800223 struct proto *prot = &udp_prot;
224
David S. Millerdb8dac22008-03-06 16:22:02 -0800225 if (sk->sk_protocol == IPPROTO_UDPLITE)
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800226 prot = &udplite_prot;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 local_bh_disable();
Pavel Emelyanovc29a0bc2008-03-31 19:41:46 -0700228 sock_prot_inuse_add(net, sk->sk_prot, -1);
229 sock_prot_inuse_add(net, prot, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 local_bh_enable();
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800231 sk->sk_prot = prot;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 sk->sk_socket->ops = &inet_dgram_ops;
233 sk->sk_family = PF_INET;
234 }
Eric Dumazet45f6fad2015-11-29 19:37:57 -0800235 opt = xchg((__force struct ipv6_txoptions **)&np->opt,
236 NULL);
237 if (opt) {
238 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
239 txopt_put(opt);
240 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 pktopt = xchg(&np->pktoptions, NULL);
Wei Yongjun800d55f2009-02-23 21:45:33 +0000242 kfree_skb(pktopt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243
244 sk->sk_destruct = inet_sock_destruct;
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700245 /*
246 * ... and add it to the refcnt debug socks count
247 * in the new family. -acme
248 */
249 sk_refcnt_debug_inc(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 module_put(THIS_MODULE);
251 retv = 0;
252 break;
253 }
254 goto e_inval;
255
256 case IPV6_V6ONLY:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900257 if (optlen < sizeof(int) ||
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000258 inet_sk(sk)->inet_num)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 goto e_inval;
Eric Dumazet9fe516b2014-06-27 08:36:16 -0700260 sk->sk_ipv6only = valbool;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 retv = 0;
262 break;
263
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900264 case IPV6_RECVPKTINFO:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900265 if (optlen < sizeof(int))
266 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 np->rxopt.bits.rxinfo = valbool;
268 retv = 0;
269 break;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900270
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900271 case IPV6_2292PKTINFO:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900272 if (optlen < sizeof(int))
273 goto e_inval;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900274 np->rxopt.bits.rxoinfo = valbool;
275 retv = 0;
276 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900278 case IPV6_RECVHOPLIMIT:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900279 if (optlen < sizeof(int))
280 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 np->rxopt.bits.rxhlim = valbool;
282 retv = 0;
283 break;
284
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900285 case IPV6_2292HOPLIMIT:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900286 if (optlen < sizeof(int))
287 goto e_inval;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900288 np->rxopt.bits.rxohlim = valbool;
289 retv = 0;
290 break;
291
292 case IPV6_RECVRTHDR:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900293 if (optlen < sizeof(int))
294 goto e_inval;
YOSHIFUJI Hideaki4c752092007-05-23 13:28:48 +0900295 np->rxopt.bits.srcrt = valbool;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 retv = 0;
297 break;
298
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900299 case IPV6_2292RTHDR:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900300 if (optlen < sizeof(int))
301 goto e_inval;
YOSHIFUJI Hideaki4c752092007-05-23 13:28:48 +0900302 np->rxopt.bits.osrcrt = valbool;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900303 retv = 0;
304 break;
305
306 case IPV6_RECVHOPOPTS:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900307 if (optlen < sizeof(int))
308 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 np->rxopt.bits.hopopts = valbool;
310 retv = 0;
311 break;
312
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900313 case IPV6_2292HOPOPTS:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900314 if (optlen < sizeof(int))
315 goto e_inval;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900316 np->rxopt.bits.ohopopts = valbool;
317 retv = 0;
318 break;
319
320 case IPV6_RECVDSTOPTS:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900321 if (optlen < sizeof(int))
322 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 np->rxopt.bits.dstopts = valbool;
324 retv = 0;
325 break;
326
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900327 case IPV6_2292DSTOPTS:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900328 if (optlen < sizeof(int))
329 goto e_inval;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900330 np->rxopt.bits.odstopts = valbool;
331 retv = 0;
332 break;
333
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900334 case IPV6_TCLASS:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900335 if (optlen < sizeof(int))
336 goto e_inval;
Remi Denis-Courmontd0ee0112006-09-13 20:08:07 -0700337 if (val < -1 || val > 0xff)
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900338 goto e_inval;
Gerrit Renker26ced1e2009-08-09 08:12:49 +0000339 /* RFC 3542, 6.5: default traffic class of 0x0 */
340 if (val == -1)
341 val = 0;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900342 np->tclass = val;
343 retv = 0;
344 break;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900345
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900346 case IPV6_RECVTCLASS:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900347 if (optlen < sizeof(int))
348 goto e_inval;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900349 np->rxopt.bits.rxtclass = valbool;
350 retv = 0;
351 break;
352
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 case IPV6_FLOWINFO:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900354 if (optlen < sizeof(int))
355 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 np->rxopt.bits.rxflow = valbool;
357 retv = 0;
358 break;
359
Brian Haley793b1472010-04-23 11:26:07 +0000360 case IPV6_RECVPATHMTU:
361 if (optlen < sizeof(int))
362 goto e_inval;
363 np->rxopt.bits.rxpmtu = valbool;
364 retv = 0;
365 break;
366
Balazs Scheidler6c468622010-10-21 16:08:28 +0200367 case IPV6_TRANSPARENT:
Eric W. Biedermanaf31f412012-11-16 03:03:06 +0000368 if (valbool && !ns_capable(net->user_ns, CAP_NET_ADMIN) &&
369 !ns_capable(net->user_ns, CAP_NET_RAW)) {
Balazs Scheidlerb8894162010-10-23 04:48:14 +0000370 retv = -EPERM;
371 break;
372 }
Balazs Scheidler6c468622010-10-21 16:08:28 +0200373 if (optlen < sizeof(int))
374 goto e_inval;
375 /* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */
376 inet_sk(sk)->transparent = valbool;
377 retv = 0;
378 break;
379
380 case IPV6_RECVORIGDSTADDR:
381 if (optlen < sizeof(int))
382 goto e_inval;
383 np->rxopt.bits.rxorigdstaddr = valbool;
384 retv = 0;
385 break;
386
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900387 case IPV6_HOPOPTS:
388 case IPV6_RTHDRDSTOPTS:
389 case IPV6_RTHDR:
390 case IPV6_DSTOPTS:
391 {
392 struct ipv6_txoptions *opt;
Shan Weiaea74272008-06-19 16:29:39 -0700393
394 /* remove any sticky options header with a zero option
395 * length, per RFC3542.
396 */
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900397 if (optlen == 0)
Luiz Capitulinocb422c42005-11-14 21:43:36 -0800398 optval = NULL;
Ian Morris63159f22015-03-29 14:00:04 +0100399 else if (!optval)
Yang Hongyangcfb266c2008-08-03 18:16:15 -0700400 goto e_inval;
Shan Weiaea74272008-06-19 16:29:39 -0700401 else if (optlen < sizeof(struct ipv6_opt_hdr) ||
402 optlen & 0x7 || optlen > 8 * 255)
403 goto e_inval;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900404
405 /* hop-by-hop / destination options are privileged option */
406 retv = -EPERM;
Eric W. Biedermanaf31f412012-11-16 03:03:06 +0000407 if (optname != IPV6_RTHDR && !ns_capable(net->user_ns, CAP_NET_RAW))
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900408 break;
409
Hannes Frederic Sowa1e1d04e2016-04-05 17:10:15 +0200410 opt = rcu_dereference_protected(np->opt,
411 lockdep_sock_is_held(sk));
Eric Dumazet45f6fad2015-11-29 19:37:57 -0800412 opt = ipv6_renew_options(sk, opt, optname,
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900413 (struct ipv6_opt_hdr __user *)optval,
414 optlen);
415 if (IS_ERR(opt)) {
416 retv = PTR_ERR(opt);
417 break;
418 }
419
420 /* routing header option needs extra check */
Brian Haley6e093d92008-11-12 22:59:21 -0800421 retv = -EINVAL;
Olaf Kirchdfee0a72007-03-09 13:55:38 -0800422 if (optname == IPV6_RTHDR && opt && opt->srcrt) {
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900423 struct ipv6_rt_hdr *rthdr = opt->srcrt;
Masahide NAKAMURA280a9d32006-08-23 19:17:12 -0700424 switch (rthdr->type) {
Amerigo Wang07a93622012-10-29 16:23:10 +0000425#if IS_ENABLED(CONFIG_IPV6_MIP6)
Masahide NAKAMURA280a9d32006-08-23 19:17:12 -0700426 case IPV6_SRCRT_TYPE_2:
Brian Haley6e093d92008-11-12 22:59:21 -0800427 if (rthdr->hdrlen != 2 ||
428 rthdr->segments_left != 1)
429 goto sticky_done;
430
Masahide NAKAMURA280a9d32006-08-23 19:17:12 -0700431 break;
YOSHIFUJI Hideakibb4dbf92007-07-10 22:55:49 -0700432#endif
Masahide NAKAMURA280a9d32006-08-23 19:17:12 -0700433 default:
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900434 goto sticky_done;
Masahide NAKAMURA280a9d32006-08-23 19:17:12 -0700435 }
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900436 }
437
438 retv = 0;
YOSHIFUJI Hideakie7712f12008-04-13 23:21:52 -0700439 opt = ipv6_update_options(sk, opt);
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900440sticky_done:
Eric Dumazet45f6fad2015-11-29 19:37:57 -0800441 if (opt) {
442 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
443 txopt_put(opt);
444 }
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900445 break;
446 }
447
Yang Hongyangb24a2512008-12-16 02:06:23 -0800448 case IPV6_PKTINFO:
449 {
450 struct in6_pktinfo pkt;
451
452 if (optlen == 0)
453 goto e_inval;
Ian Morris63159f22015-03-29 14:00:04 +0100454 else if (optlen < sizeof(struct in6_pktinfo) || !optval)
Yang Hongyangb24a2512008-12-16 02:06:23 -0800455 goto e_inval;
456
Ilpo Järvinen914d1162009-01-04 17:27:31 -0800457 if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) {
Yang Hongyangb24a2512008-12-16 02:06:23 -0800458 retv = -EFAULT;
459 break;
460 }
461 if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if)
462 goto e_inval;
463
464 np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000465 np->sticky_pktinfo.ipi6_addr = pkt.ipi6_addr;
Yang Hongyangb24a2512008-12-16 02:06:23 -0800466 retv = 0;
467 break;
468 }
469
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900470 case IPV6_2292PKTOPTIONS:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 {
472 struct ipv6_txoptions *opt = NULL;
473 struct msghdr msg;
David S. Miller4c9483b2011-03-12 16:22:43 -0500474 struct flowi6 fl6;
Soheil Hassas Yeganehad1e46a2016-04-02 23:08:11 -0400475 struct sockcm_cookie sockc_junk;
Wei Wang26879da2016-05-02 21:40:07 -0700476 struct ipcm6_cookie ipc6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
David S. Miller4c9483b2011-03-12 16:22:43 -0500478 memset(&fl6, 0, sizeof(fl6));
479 fl6.flowi6_oif = sk->sk_bound_dev_if;
480 fl6.flowi6_mark = sk->sk_mark;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481
482 if (optlen == 0)
483 goto update;
484
485 /* 1K is probably excessive
486 * 1K is surely not enough, 2K per standard header is 16K.
487 */
488 retv = -EINVAL;
489 if (optlen > 64*1024)
490 break;
491
492 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
493 retv = -ENOBUFS;
Ian Morris63159f22015-03-29 14:00:04 +0100494 if (!opt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 break;
496
497 memset(opt, 0, sizeof(*opt));
Eric Dumazet45f6fad2015-11-29 19:37:57 -0800498 atomic_set(&opt->refcnt, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 opt->tot_len = sizeof(*opt) + optlen;
500 retv = -EFAULT;
501 if (copy_from_user(opt+1, optval, optlen))
502 goto done;
503
504 msg.msg_controllen = optlen;
Ian Morris67ba4152014-08-24 21:53:10 +0100505 msg.msg_control = (void *)(opt+1);
Wei Wang26879da2016-05-02 21:40:07 -0700506 ipc6.opt = opt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507
Wei Wang26879da2016-05-02 21:40:07 -0700508 retv = ip6_datagram_send_ctl(net, sk, &msg, &fl6, &ipc6, &sockc_junk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 if (retv)
510 goto done;
511update:
512 retv = 0;
YOSHIFUJI Hideakie7712f12008-04-13 23:21:52 -0700513 opt = ipv6_update_options(sk, opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514done:
Eric Dumazet45f6fad2015-11-29 19:37:57 -0800515 if (opt) {
516 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
517 txopt_put(opt);
518 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 break;
520 }
521 case IPV6_UNICAST_HOPS:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900522 if (optlen < sizeof(int))
523 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 if (val > 255 || val < -1)
525 goto e_inval;
526 np->hop_limit = val;
527 retv = 0;
528 break;
529
530 case IPV6_MULTICAST_HOPS:
531 if (sk->sk_type == SOCK_STREAM)
YOSHIFUJI Hideaki17176992008-06-12 03:27:26 +0900532 break;
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900533 if (optlen < sizeof(int))
534 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 if (val > 255 || val < -1)
536 goto e_inval;
Li Wei2a38e6d2011-11-27 21:33:34 +0000537 np->mcast_hops = (val == -1 ? IPV6_DEFAULT_MCASTHOPS : val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 retv = 0;
539 break;
540
541 case IPV6_MULTICAST_LOOP:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900542 if (optlen < sizeof(int))
543 goto e_inval;
YOSHIFUJI Hideaki28d44882008-06-12 03:14:51 +0900544 if (val != valbool)
545 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 np->mc_loop = valbool;
547 retv = 0;
548 break;
549
Erich E. Hooverc4062df2012-02-08 09:11:08 +0000550 case IPV6_UNICAST_IF:
551 {
552 struct net_device *dev = NULL;
553 int ifindex;
554
555 if (optlen != sizeof(int))
556 goto e_inval;
557
558 ifindex = (__force int)ntohl((__force __be32)val);
559 if (ifindex == 0) {
560 np->ucast_oif = 0;
561 retv = 0;
562 break;
563 }
564
565 dev = dev_get_by_index(net, ifindex);
566 retv = -EADDRNOTAVAIL;
567 if (!dev)
568 break;
569 dev_put(dev);
570
571 retv = -EINVAL;
572 if (sk->sk_bound_dev_if)
573 break;
574
575 np->ucast_oif = ifindex;
576 retv = 0;
577 break;
578 }
579
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 case IPV6_MULTICAST_IF:
581 if (sk->sk_type == SOCK_STREAM)
YOSHIFUJI Hideaki17176992008-06-12 03:27:26 +0900582 break;
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900583 if (optlen < sizeof(int))
584 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585
Brian Haley4953f0f2007-10-11 14:39:29 -0700586 if (val) {
Eric Dumazet55b80502009-10-19 06:41:58 +0000587 struct net_device *dev;
588
Brian Haley4953f0f2007-10-11 14:39:29 -0700589 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
590 goto e_inval;
591
Eric Dumazet55b80502009-10-19 06:41:58 +0000592 dev = dev_get_by_index(net, val);
593 if (!dev) {
Brian Haley4953f0f2007-10-11 14:39:29 -0700594 retv = -ENODEV;
595 break;
596 }
Eric Dumazet55b80502009-10-19 06:41:58 +0000597 dev_put(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 }
599 np->mcast_oif = val;
600 retv = 0;
601 break;
602 case IPV6_ADD_MEMBERSHIP:
603 case IPV6_DROP_MEMBERSHIP:
604 {
605 struct ipv6_mreq mreq;
606
Wang Chena28398b2008-04-07 09:42:07 +0800607 if (optlen < sizeof(struct ipv6_mreq))
608 goto e_inval;
609
Flavio Leitnera96fb492007-08-24 22:16:39 -0700610 retv = -EPROTO;
611 if (inet_sk(sk)->is_icsk)
612 break;
613
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 retv = -EFAULT;
615 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
616 break;
617
618 if (optname == IPV6_ADD_MEMBERSHIP)
Marcelo Ricardo Leitner54ff9ef2015-03-18 14:50:43 -0300619 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 else
Marcelo Ricardo Leitner54ff9ef2015-03-18 14:50:43 -0300621 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 break;
623 }
624 case IPV6_JOIN_ANYCAST:
625 case IPV6_LEAVE_ANYCAST:
626 {
627 struct ipv6_mreq mreq;
628
Wang Chena28398b2008-04-07 09:42:07 +0800629 if (optlen < sizeof(struct ipv6_mreq))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 goto e_inval;
631
632 retv = -EFAULT;
633 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
634 break;
635
636 if (optname == IPV6_JOIN_ANYCAST)
637 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
638 else
639 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
640 break;
641 }
642 case MCAST_JOIN_GROUP:
643 case MCAST_LEAVE_GROUP:
644 {
645 struct group_req greq;
646 struct sockaddr_in6 *psin6;
647
Wang Chena28398b2008-04-07 09:42:07 +0800648 if (optlen < sizeof(struct group_req))
649 goto e_inval;
650
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 retv = -EFAULT;
652 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
653 break;
654 if (greq.gr_group.ss_family != AF_INET6) {
655 retv = -EADDRNOTAVAIL;
656 break;
657 }
658 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
659 if (optname == MCAST_JOIN_GROUP)
Marcelo Ricardo Leitner54ff9ef2015-03-18 14:50:43 -0300660 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
661 &psin6->sin6_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 else
Marcelo Ricardo Leitner54ff9ef2015-03-18 14:50:43 -0300663 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
664 &psin6->sin6_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 break;
666 }
667 case MCAST_JOIN_SOURCE_GROUP:
668 case MCAST_LEAVE_SOURCE_GROUP:
669 case MCAST_BLOCK_SOURCE:
670 case MCAST_UNBLOCK_SOURCE:
671 {
672 struct group_source_req greqs;
673 int omode, add;
674
Wang Chena28398b2008-04-07 09:42:07 +0800675 if (optlen < sizeof(struct group_source_req))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 goto e_inval;
677 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
678 retv = -EFAULT;
679 break;
680 }
681 if (greqs.gsr_group.ss_family != AF_INET6 ||
682 greqs.gsr_source.ss_family != AF_INET6) {
683 retv = -EADDRNOTAVAIL;
684 break;
685 }
686 if (optname == MCAST_BLOCK_SOURCE) {
687 omode = MCAST_EXCLUDE;
688 add = 1;
689 } else if (optname == MCAST_UNBLOCK_SOURCE) {
690 omode = MCAST_EXCLUDE;
691 add = 0;
692 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
693 struct sockaddr_in6 *psin6;
694
695 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
Marcelo Ricardo Leitner54ff9ef2015-03-18 14:50:43 -0300696 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
697 &psin6->sin6_addr);
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700698 /* prior join w/ different source is ok */
699 if (retv && retv != -EADDRINUSE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 break;
701 omode = MCAST_INCLUDE;
702 add = 1;
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700703 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 omode = MCAST_INCLUDE;
705 add = 0;
706 }
707 retv = ip6_mc_source(add, omode, sk, &greqs);
708 break;
709 }
710 case MCAST_MSFILTER:
711 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 struct group_filter *gsf;
713
714 if (optlen < GROUP_FILTER_SIZE(0))
715 goto e_inval;
716 if (optlen > sysctl_optmem_max) {
717 retv = -ENOBUFS;
718 break;
719 }
Ian Morris67ba4152014-08-24 21:53:10 +0100720 gsf = kmalloc(optlen, GFP_KERNEL);
Stephen Hemmingercfcabdc2007-10-09 01:59:42 -0700721 if (!gsf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 retv = -ENOBUFS;
723 break;
724 }
725 retv = -EFAULT;
726 if (copy_from_user(gsf, optval, optlen)) {
727 kfree(gsf);
728 break;
729 }
730 /* numsrc >= (4G-140)/128 overflow in 32 bits */
731 if (gsf->gf_numsrc >= 0x1ffffffU ||
732 gsf->gf_numsrc > sysctl_mld_max_msf) {
733 kfree(gsf);
734 retv = -ENOBUFS;
735 break;
736 }
737 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
738 kfree(gsf);
739 retv = -EINVAL;
740 break;
741 }
742 retv = ip6_mc_msfilter(sk, gsf);
743 kfree(gsf);
744
745 break;
746 }
747 case IPV6_ROUTER_ALERT:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900748 if (optlen < sizeof(int))
749 goto e_inval;
Denis V. Lunev725a8ff2008-07-19 00:28:58 -0700750 retv = ip6_ra_control(sk, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 break;
752 case IPV6_MTU_DISCOVER:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900753 if (optlen < sizeof(int))
754 goto e_inval;
Hannes Frederic Sowa0b952272014-02-26 01:20:43 +0100755 if (val < IPV6_PMTUDISC_DONT || val > IPV6_PMTUDISC_OMIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 goto e_inval;
757 np->pmtudisc = val;
758 retv = 0;
759 break;
760 case IPV6_MTU:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900761 if (optlen < sizeof(int))
762 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 if (val && val < IPV6_MIN_MTU)
764 goto e_inval;
765 np->frag_size = val;
766 retv = 0;
767 break;
768 case IPV6_RECVERR:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900769 if (optlen < sizeof(int))
770 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 np->recverr = valbool;
772 if (!val)
773 skb_queue_purge(&sk->sk_error_queue);
774 retv = 0;
775 break;
776 case IPV6_FLOWINFO_SEND:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900777 if (optlen < sizeof(int))
778 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 np->sndflow = valbool;
780 retv = 0;
781 break;
782 case IPV6_FLOWLABEL_MGR:
783 retv = ipv6_flowlabel_opt(sk, optval, optlen);
784 break;
785 case IPV6_IPSEC_POLICY:
786 case IPV6_XFRM_POLICY:
Herbert Xu6fc0b4a2005-08-06 06:33:15 -0700787 retv = -EPERM;
Eric W. Biedermanaf31f412012-11-16 03:03:06 +0000788 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Herbert Xu6fc0b4a2005-08-06 06:33:15 -0700789 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790 retv = xfrm_user_policy(sk, optname, optval, optlen);
791 break;
792
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +0900793 case IPV6_ADDR_PREFERENCES:
794 {
795 unsigned int pref = 0;
796 unsigned int prefmask = ~0;
797
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900798 if (optlen < sizeof(int))
799 goto e_inval;
800
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +0900801 retv = -EINVAL;
802
803 /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */
804 switch (val & (IPV6_PREFER_SRC_PUBLIC|
805 IPV6_PREFER_SRC_TMP|
806 IPV6_PREFER_SRC_PUBTMP_DEFAULT)) {
807 case IPV6_PREFER_SRC_PUBLIC:
808 pref |= IPV6_PREFER_SRC_PUBLIC;
809 break;
810 case IPV6_PREFER_SRC_TMP:
811 pref |= IPV6_PREFER_SRC_TMP;
812 break;
813 case IPV6_PREFER_SRC_PUBTMP_DEFAULT:
814 break;
815 case 0:
816 goto pref_skip_pubtmp;
817 default:
818 goto e_inval;
819 }
820
821 prefmask &= ~(IPV6_PREFER_SRC_PUBLIC|
822 IPV6_PREFER_SRC_TMP);
823pref_skip_pubtmp:
824
825 /* check HOME/COA conflicts */
826 switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) {
827 case IPV6_PREFER_SRC_HOME:
828 break;
829 case IPV6_PREFER_SRC_COA:
830 pref |= IPV6_PREFER_SRC_COA;
831 case 0:
832 goto pref_skip_coa;
833 default:
834 goto e_inval;
835 }
836
837 prefmask &= ~IPV6_PREFER_SRC_COA;
838pref_skip_coa:
839
840 /* check CGA/NONCGA conflicts */
841 switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) {
842 case IPV6_PREFER_SRC_CGA:
843 case IPV6_PREFER_SRC_NONCGA:
844 case 0:
845 break;
846 default:
847 goto e_inval;
848 }
849
850 np->srcprefs = (np->srcprefs & prefmask) | pref;
851 retv = 0;
852
853 break;
854 }
Stephen Hemmingere802af92010-04-22 15:24:53 -0700855 case IPV6_MINHOPCOUNT:
856 if (optlen < sizeof(int))
857 goto e_inval;
858 if (val < 0 || val > 255)
859 goto e_inval;
860 np->min_hopcount = val;
Hannes Frederic Sowad4596ba2012-11-10 19:52:34 +0000861 retv = 0;
Brian Haley793b1472010-04-23 11:26:07 +0000862 break;
863 case IPV6_DONTFRAG:
864 np->dontfrag = valbool;
Stephen Hemmingere802af92010-04-22 15:24:53 -0700865 retv = 0;
866 break;
Tom Herbertcb1ce2e2014-07-01 21:33:10 -0700867 case IPV6_AUTOFLOWLABEL:
868 np->autoflowlabel = valbool;
869 retv = 0;
870 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 }
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +0900872
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 release_sock(sk);
Marcelo Ricardo Leitnerbaf606d2015-03-18 14:50:42 -0300874 if (needs_rtnl)
875 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 return retv;
878
879e_inval:
880 release_sock(sk);
Marcelo Ricardo Leitnerbaf606d2015-03-18 14:50:42 -0300881 if (needs_rtnl)
882 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 return -EINVAL;
884}
885
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800886int ipv6_setsockopt(struct sock *sk, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700887 char __user *optval, unsigned int optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800888{
889 int err;
890
891 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
892 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
893
894 if (level != SOL_IPV6)
895 return -ENOPROTOOPT;
896
897 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
898#ifdef CONFIG_NETFILTER
899 /* we need to exclude all possible ENOPROTOOPTs except default case */
900 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
901 optname != IPV6_XFRM_POLICY) {
902 lock_sock(sk);
903 err = nf_setsockopt(sk, PF_INET6, optname, optval,
904 optlen);
905 release_sock(sk);
906 }
907#endif
908 return err;
909}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900910EXPORT_SYMBOL(ipv6_setsockopt);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800911
912#ifdef CONFIG_COMPAT
913int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700914 char __user *optval, unsigned int optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800915{
916 int err;
917
918 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800919 if (udp_prot.compat_setsockopt != NULL)
920 return udp_prot.compat_setsockopt(sk, level, optname,
921 optval, optlen);
922 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800923 }
924
925 if (level != SOL_IPV6)
926 return -ENOPROTOOPT;
927
David L Stevensdae50292008-04-27 01:06:07 -0700928 if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER)
929 return compat_mc_setsockopt(sk, level, optname, optval, optlen,
930 ipv6_setsockopt);
931
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800932 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
933#ifdef CONFIG_NETFILTER
934 /* we need to exclude all possible ENOPROTOOPTs except default case */
935 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800936 optname != IPV6_XFRM_POLICY) {
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800937 lock_sock(sk);
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800938 err = compat_nf_setsockopt(sk, PF_INET6, optname,
939 optval, optlen);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800940 release_sock(sk);
941 }
942#endif
943 return err;
944}
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800945EXPORT_SYMBOL(compat_ipv6_setsockopt);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800946#endif
947
David S. Miller286930792007-03-07 12:50:46 -0800948static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
YOSHIFUJI Hideaki4c6510a2007-03-18 17:35:57 -0700949 int optname, char __user *optval, int len)
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900950{
David S. Miller286930792007-03-07 12:50:46 -0800951 struct ipv6_opt_hdr *hdr;
952
YOSHIFUJI Hideaki4c6510a2007-03-18 17:35:57 -0700953 if (!opt)
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900954 return 0;
YOSHIFUJI Hideaki4c6510a2007-03-18 17:35:57 -0700955
Ian Morris67ba4152014-08-24 21:53:10 +0100956 switch (optname) {
YOSHIFUJI Hideaki4c6510a2007-03-18 17:35:57 -0700957 case IPV6_HOPOPTS:
958 hdr = opt->hopopt;
959 break;
960 case IPV6_RTHDRDSTOPTS:
961 hdr = opt->dst0opt;
962 break;
963 case IPV6_RTHDR:
964 hdr = (struct ipv6_opt_hdr *)opt->srcrt;
965 break;
966 case IPV6_DSTOPTS:
967 hdr = opt->dst1opt;
968 break;
969 default:
970 return -EINVAL; /* should not happen */
971 }
972
973 if (!hdr)
974 return 0;
David S. Miller286930792007-03-07 12:50:46 -0800975
Chris Wrightd2b02ed2007-03-09 16:19:17 -0800976 len = min_t(unsigned int, len, ipv6_optlen(hdr));
Ilpo Järvinen660adc62007-08-15 15:07:30 -0700977 if (copy_to_user(optval, hdr, len))
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900978 return -EFAULT;
Yang Hongyang95b496b2008-05-28 16:27:28 +0800979 return len;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900980}
981
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800982static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
Eric Dumazet95c96172012-04-15 05:58:06 +0000983 char __user *optval, int __user *optlen, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984{
985 struct ipv6_pinfo *np = inet6_sk(sk);
986 int len;
987 int val;
988
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900989 if (ip6_mroute_opt(optname))
990 return ip6_mroute_getsockopt(sk, optname, optval, optlen);
991
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 if (get_user(len, optlen))
993 return -EFAULT;
994 switch (optname) {
995 case IPV6_ADDRFORM:
996 if (sk->sk_protocol != IPPROTO_UDP &&
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800997 sk->sk_protocol != IPPROTO_UDPLITE &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998 sk->sk_protocol != IPPROTO_TCP)
YOSHIFUJI Hideaki17176992008-06-12 03:27:26 +0900999 return -ENOPROTOOPT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 if (sk->sk_state != TCP_ESTABLISHED)
1001 return -ENOTCONN;
1002 val = sk->sk_family;
1003 break;
1004 case MCAST_MSFILTER:
1005 {
1006 struct group_filter gsf;
1007 int err;
1008
1009 if (len < GROUP_FILTER_SIZE(0))
1010 return -EINVAL;
1011 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
1012 return -EFAULT;
YOSHIFUJI Hideaki20c61fb2008-04-28 14:40:55 +09001013 if (gsf.gf_group.ss_family != AF_INET6)
1014 return -EADDRNOTAVAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015 lock_sock(sk);
1016 err = ip6_mc_msfget(sk, &gsf,
1017 (struct group_filter __user *)optval, optlen);
1018 release_sock(sk);
1019 return err;
1020 }
1021
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +09001022 case IPV6_2292PKTOPTIONS:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 {
1024 struct msghdr msg;
1025 struct sk_buff *skb;
1026
1027 if (sk->sk_type != SOCK_STREAM)
1028 return -ENOPROTOOPT;
1029
1030 msg.msg_control = optval;
1031 msg.msg_controllen = len;
Daniel Baluta98e77432011-08-19 03:19:07 -07001032 msg.msg_flags = flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033
1034 lock_sock(sk);
1035 skb = np->pktoptions;
1036 if (skb)
Hannes Frederic Sowa4b261c72014-01-20 03:43:08 +01001037 ip6_datagram_recv_ctl(sk, &msg, skb);
Eric Dumazet1dc7b902015-01-21 03:45:42 -08001038 release_sock(sk);
1039 if (!skb) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 if (np->rxopt.bits.rxinfo) {
1041 struct in6_pktinfo src_info;
Yang Hongyangf250dcd2008-12-16 02:07:45 -08001042 src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif :
1043 np->sticky_pktinfo.ipi6_ifindex;
Eric Dumazetefe42082013-10-03 15:42:29 -07001044 src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : np->sticky_pktinfo.ipi6_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
1046 }
1047 if (np->rxopt.bits.rxhlim) {
1048 int hlim = np->mcast_hops;
1049 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
1050 }
Jiri Benc4c507d22012-02-09 09:35:49 +00001051 if (np->rxopt.bits.rxtclass) {
Li RongQingd76ed222014-01-15 17:03:30 +08001052 int tclass = (int)ip6_tclass(np->rcv_flowinfo);
1053
Jiri Benc4c507d22012-02-09 09:35:49 +00001054 put_cmsg(&msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass);
1055 }
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +09001056 if (np->rxopt.bits.rxoinfo) {
1057 struct in6_pktinfo src_info;
Yang Hongyangf250dcd2008-12-16 02:07:45 -08001058 src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif :
1059 np->sticky_pktinfo.ipi6_ifindex;
Eric Dumazetefe42082013-10-03 15:42:29 -07001060 src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr :
1061 np->sticky_pktinfo.ipi6_addr;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +09001062 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
1063 }
1064 if (np->rxopt.bits.rxohlim) {
1065 int hlim = np->mcast_hops;
1066 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
1067 }
Florent Fourcot1397ed32013-12-08 15:46:57 +01001068 if (np->rxopt.bits.rxflow) {
Florent Fourcot68536052013-12-12 17:07:58 +01001069 __be32 flowinfo = np->rcv_flowinfo;
1070
Florent Fourcot1397ed32013-12-08 15:46:57 +01001071 put_cmsg(&msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo);
1072 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073 }
1074 len -= msg.msg_controllen;
1075 return put_user(len, optlen);
1076 }
1077 case IPV6_MTU:
1078 {
1079 struct dst_entry *dst;
Eric Dumazetb6c67122010-04-08 23:03:29 +00001080
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001081 val = 0;
Eric Dumazetb6c67122010-04-08 23:03:29 +00001082 rcu_read_lock();
1083 dst = __sk_dst_get(sk);
1084 if (dst)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 val = dst_mtu(dst);
Eric Dumazetb6c67122010-04-08 23:03:29 +00001086 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 if (!val)
1088 return -ENOTCONN;
1089 break;
1090 }
1091
1092 case IPV6_V6ONLY:
Eric Dumazet9fe516b2014-06-27 08:36:16 -07001093 val = sk->sk_ipv6only;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 break;
1095
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +09001096 case IPV6_RECVPKTINFO:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097 val = np->rxopt.bits.rxinfo;
1098 break;
1099
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +09001100 case IPV6_2292PKTINFO:
1101 val = np->rxopt.bits.rxoinfo;
1102 break;
1103
1104 case IPV6_RECVHOPLIMIT:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 val = np->rxopt.bits.rxhlim;
1106 break;
1107
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +09001108 case IPV6_2292HOPLIMIT:
1109 val = np->rxopt.bits.rxohlim;
1110 break;
1111
1112 case IPV6_RECVRTHDR:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 val = np->rxopt.bits.srcrt;
1114 break;
1115
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +09001116 case IPV6_2292RTHDR:
1117 val = np->rxopt.bits.osrcrt;
1118 break;
1119
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 case IPV6_HOPOPTS:
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +09001121 case IPV6_RTHDRDSTOPTS:
1122 case IPV6_RTHDR:
1123 case IPV6_DSTOPTS:
1124 {
Eric Dumazet45f6fad2015-11-29 19:37:57 -08001125 struct ipv6_txoptions *opt;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +09001126
1127 lock_sock(sk);
Hannes Frederic Sowa1e1d04e2016-04-05 17:10:15 +02001128 opt = rcu_dereference_protected(np->opt,
1129 lockdep_sock_is_held(sk));
Eric Dumazet45f6fad2015-11-29 19:37:57 -08001130 len = ipv6_getsockopt_sticky(sk, opt, optname, optval, len);
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +09001131 release_sock(sk);
Yang Hongyang05335c22008-05-28 16:23:47 +08001132 /* check if ipv6_getsockopt_sticky() returns err code */
1133 if (len < 0)
1134 return len;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +09001135 return put_user(len, optlen);
1136 }
1137
1138 case IPV6_RECVHOPOPTS:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 val = np->rxopt.bits.hopopts;
1140 break;
1141
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +09001142 case IPV6_2292HOPOPTS:
1143 val = np->rxopt.bits.ohopopts;
1144 break;
1145
1146 case IPV6_RECVDSTOPTS:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 val = np->rxopt.bits.dstopts;
1148 break;
1149
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +09001150 case IPV6_2292DSTOPTS:
1151 val = np->rxopt.bits.odstopts;
1152 break;
1153
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +09001154 case IPV6_TCLASS:
1155 val = np->tclass;
1156 break;
1157
1158 case IPV6_RECVTCLASS:
1159 val = np->rxopt.bits.rxtclass;
1160 break;
1161
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162 case IPV6_FLOWINFO:
1163 val = np->rxopt.bits.rxflow;
1164 break;
1165
Brian Haley793b1472010-04-23 11:26:07 +00001166 case IPV6_RECVPATHMTU:
1167 val = np->rxopt.bits.rxpmtu;
1168 break;
1169
1170 case IPV6_PATHMTU:
1171 {
1172 struct dst_entry *dst;
1173 struct ip6_mtuinfo mtuinfo;
1174
1175 if (len < sizeof(mtuinfo))
1176 return -EINVAL;
1177
1178 len = sizeof(mtuinfo);
1179 memset(&mtuinfo, 0, sizeof(mtuinfo));
1180
1181 rcu_read_lock();
1182 dst = __sk_dst_get(sk);
1183 if (dst)
1184 mtuinfo.ip6m_mtu = dst_mtu(dst);
1185 rcu_read_unlock();
1186 if (!mtuinfo.ip6m_mtu)
1187 return -ENOTCONN;
1188
1189 if (put_user(len, optlen))
1190 return -EFAULT;
1191 if (copy_to_user(optval, &mtuinfo, len))
1192 return -EFAULT;
1193
1194 return 0;
Brian Haley793b1472010-04-23 11:26:07 +00001195 }
1196
Balazs Scheidler6c468622010-10-21 16:08:28 +02001197 case IPV6_TRANSPARENT:
1198 val = inet_sk(sk)->transparent;
1199 break;
1200
1201 case IPV6_RECVORIGDSTADDR:
1202 val = np->rxopt.bits.rxorigdstaddr;
1203 break;
1204
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205 case IPV6_UNICAST_HOPS:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206 case IPV6_MULTICAST_HOPS:
Brian Haleybefffe92006-12-12 17:09:49 -08001207 {
1208 struct dst_entry *dst;
1209
1210 if (optname == IPV6_UNICAST_HOPS)
1211 val = np->hop_limit;
1212 else
1213 val = np->mcast_hops;
1214
Eric Dumazetb6c67122010-04-08 23:03:29 +00001215 if (val < 0) {
1216 rcu_read_lock();
1217 dst = __sk_dst_get(sk);
1218 if (dst)
YOSHIFUJI Hideaki6b75d092008-03-10 06:00:30 -04001219 val = ip6_dst_hoplimit(dst);
Eric Dumazetb6c67122010-04-08 23:03:29 +00001220 rcu_read_unlock();
Brian Haleybefffe92006-12-12 17:09:49 -08001221 }
Eric Dumazetb6c67122010-04-08 23:03:29 +00001222
Brian Haleybefffe92006-12-12 17:09:49 -08001223 if (val < 0)
YOSHIFUJI Hideaki53b79972008-07-19 22:35:03 -07001224 val = sock_net(sk)->ipv6.devconf_all->hop_limit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225 break;
Brian Haleybefffe92006-12-12 17:09:49 -08001226 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227
1228 case IPV6_MULTICAST_LOOP:
1229 val = np->mc_loop;
1230 break;
1231
1232 case IPV6_MULTICAST_IF:
1233 val = np->mcast_oif;
1234 break;
1235
Erich E. Hooverc4062df2012-02-08 09:11:08 +00001236 case IPV6_UNICAST_IF:
1237 val = (__force int)htonl((__u32) np->ucast_oif);
1238 break;
1239
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 case IPV6_MTU_DISCOVER:
1241 val = np->pmtudisc;
1242 break;
1243
1244 case IPV6_RECVERR:
1245 val = np->recverr;
1246 break;
1247
1248 case IPV6_FLOWINFO_SEND:
1249 val = np->sndflow;
1250 break;
1251
Florent Fourcot3fdfa5f2013-11-07 17:53:12 +01001252 case IPV6_FLOWLABEL_MGR:
1253 {
1254 struct in6_flowlabel_req freq;
Florent Fourcot46e5f402014-01-17 17:15:04 +01001255 int flags;
Florent Fourcot3fdfa5f2013-11-07 17:53:12 +01001256
1257 if (len < sizeof(freq))
1258 return -EINVAL;
1259
1260 if (copy_from_user(&freq, optval, sizeof(freq)))
1261 return -EFAULT;
1262
1263 if (freq.flr_action != IPV6_FL_A_GET)
1264 return -EINVAL;
1265
1266 len = sizeof(freq);
Florent Fourcot46e5f402014-01-17 17:15:04 +01001267 flags = freq.flr_flags;
1268
Florent Fourcot3fdfa5f2013-11-07 17:53:12 +01001269 memset(&freq, 0, sizeof(freq));
1270
Florent Fourcot46e5f402014-01-17 17:15:04 +01001271 val = ipv6_flowlabel_opt_get(sk, &freq, flags);
Florent Fourcot3fdfa5f2013-11-07 17:53:12 +01001272 if (val < 0)
1273 return val;
1274
1275 if (put_user(len, optlen))
1276 return -EFAULT;
1277 if (copy_to_user(optval, &freq, len))
1278 return -EFAULT;
1279
1280 return 0;
1281 }
1282
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001283 case IPV6_ADDR_PREFERENCES:
1284 val = 0;
1285
1286 if (np->srcprefs & IPV6_PREFER_SRC_TMP)
1287 val |= IPV6_PREFER_SRC_TMP;
1288 else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC)
1289 val |= IPV6_PREFER_SRC_PUBLIC;
1290 else {
1291 /* XXX: should we return system default? */
1292 val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT;
1293 }
1294
1295 if (np->srcprefs & IPV6_PREFER_SRC_COA)
1296 val |= IPV6_PREFER_SRC_COA;
1297 else
1298 val |= IPV6_PREFER_SRC_HOME;
1299 break;
1300
Stephen Hemmingere802af92010-04-22 15:24:53 -07001301 case IPV6_MINHOPCOUNT:
1302 val = np->min_hopcount;
1303 break;
1304
Brian Haley793b1472010-04-23 11:26:07 +00001305 case IPV6_DONTFRAG:
1306 val = np->dontfrag;
1307 break;
1308
Tom Herbertcb1ce2e2014-07-01 21:33:10 -07001309 case IPV6_AUTOFLOWLABEL:
1310 val = np->autoflowlabel;
1311 break;
1312
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313 default:
Wei Yongjuncf6fc4a2007-12-16 13:39:57 -08001314 return -ENOPROTOOPT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 }
1316 len = min_t(unsigned int, sizeof(int), len);
Ian Morris67ba4152014-08-24 21:53:10 +01001317 if (put_user(len, optlen))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 return -EFAULT;
Ian Morris67ba4152014-08-24 21:53:10 +01001319 if (copy_to_user(optval, &val, len))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320 return -EFAULT;
1321 return 0;
1322}
1323
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001324int ipv6_getsockopt(struct sock *sk, int level, int optname,
1325 char __user *optval, int __user *optlen)
1326{
1327 int err;
1328
1329 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
1330 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1331
Ian Morris67ba4152014-08-24 21:53:10 +01001332 if (level != SOL_IPV6)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001333 return -ENOPROTOOPT;
1334
Daniel Baluta98e77432011-08-19 03:19:07 -07001335 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 0);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001336#ifdef CONFIG_NETFILTER
Wei Yongjuncf6fc4a2007-12-16 13:39:57 -08001337 /* we need to exclude all possible ENOPROTOOPTs except default case */
1338 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001339 int len;
1340
1341 if (get_user(len, optlen))
1342 return -EFAULT;
1343
1344 lock_sock(sk);
1345 err = nf_getsockopt(sk, PF_INET6, optname, optval,
1346 &len);
1347 release_sock(sk);
1348 if (err >= 0)
1349 err = put_user(len, optlen);
1350 }
1351#endif
1352 return err;
1353}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +09001354EXPORT_SYMBOL(ipv6_getsockopt);
1355
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001356#ifdef CONFIG_COMPAT
1357int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001358 char __user *optval, int __user *optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001359{
1360 int err;
1361
1362 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001363 if (udp_prot.compat_getsockopt != NULL)
1364 return udp_prot.compat_getsockopt(sk, level, optname,
1365 optval, optlen);
1366 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001367 }
1368
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001369 if (level != SOL_IPV6)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001370 return -ENOPROTOOPT;
1371
Pavel Emelyanov80991792008-04-30 14:49:54 -07001372 if (optname == MCAST_MSFILTER)
1373 return compat_mc_getsockopt(sk, level, optname, optval, optlen,
1374 ipv6_getsockopt);
1375
Daniel Baluta98e77432011-08-19 03:19:07 -07001376 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen,
1377 MSG_CMSG_COMPAT);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001378#ifdef CONFIG_NETFILTER
Wei Yongjuncf6fc4a2007-12-16 13:39:57 -08001379 /* we need to exclude all possible ENOPROTOOPTs except default case */
1380 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001381 int len;
1382
1383 if (get_user(len, optlen))
1384 return -EFAULT;
1385
1386 lock_sock(sk);
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001387 err = compat_nf_getsockopt(sk, PF_INET6,
1388 optname, optval, &len);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001389 release_sock(sk);
1390 if (err >= 0)
1391 err = put_user(len, optlen);
1392 }
1393#endif
1394 return err;
1395}
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001396EXPORT_SYMBOL(compat_ipv6_getsockopt);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001397#endif
1398