blob: 030c0c956f9db6d9aa1411c825d07bab00b32c0f [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>
39
40#include <net/sock.h>
41#include <net/snmp.h>
42#include <net/ipv6.h>
43#include <net/ndisc.h>
44#include <net/protocol.h>
45#include <net/transp_v6.h>
46#include <net/ip6_route.h>
47#include <net/addrconf.h>
48#include <net/inet_common.h>
49#include <net/tcp.h>
50#include <net/udp.h>
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080051#include <net/udplite.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#include <net/xfrm.h>
David L Stevensdae50292008-04-27 01:06:07 -070053#include <net/compat.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
55#include <asm/uaccess.h>
56
Eric Dumazetba899662005-08-26 12:05:31 -070057DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Linus Torvalds1da177e2005-04-16 15:20:36 -070059struct ip6_ra_chain *ip6_ra_chain;
60DEFINE_RWLOCK(ip6_ra_lock);
61
62int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *))
63{
64 struct ip6_ra_chain *ra, *new_ra, **rap;
65
66 /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
67 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW)
YOSHIFUJI Hideaki17176992008-06-12 03:27:26 +090068 return -ENOPROTOOPT;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
70 new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
71
72 write_lock_bh(&ip6_ra_lock);
73 for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
74 if (ra->sk == sk) {
75 if (sel>=0) {
76 write_unlock_bh(&ip6_ra_lock);
Jesper Juhla51482b2005-11-08 09:41:34 -080077 kfree(new_ra);
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 return -EADDRINUSE;
79 }
80
81 *rap = ra->next;
82 write_unlock_bh(&ip6_ra_lock);
83
84 if (ra->destructor)
85 ra->destructor(sk);
86 sock_put(sk);
87 kfree(ra);
88 return 0;
89 }
90 }
91 if (new_ra == NULL) {
92 write_unlock_bh(&ip6_ra_lock);
93 return -ENOBUFS;
94 }
95 new_ra->sk = sk;
96 new_ra->sel = sel;
97 new_ra->destructor = destructor;
98 new_ra->next = ra;
99 *rap = new_ra;
100 sock_hold(sk);
101 write_unlock_bh(&ip6_ra_lock);
102 return 0;
103}
104
YOSHIFUJI Hideakie7712f12008-04-13 23:21:52 -0700105static
106struct ipv6_txoptions *ipv6_update_options(struct sock *sk,
107 struct ipv6_txoptions *opt)
108{
109 if (inet_sk(sk)->is_icsk) {
110 if (opt &&
111 !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
112 inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
113 struct inet_connection_sock *icsk = inet_csk(sk);
114 icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen;
115 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
116 }
117 opt = xchg(&inet6_sk(sk)->opt, opt);
118 } else {
119 write_lock(&sk->sk_dst_lock);
120 opt = xchg(&inet6_sk(sk)->opt, opt);
121 write_unlock(&sk->sk_dst_lock);
122 }
123 sk_dst_reset(sk);
124
125 return opt;
126}
127
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800128static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 char __user *optval, int optlen)
130{
131 struct ipv6_pinfo *np = inet6_sk(sk);
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900132 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 int val, valbool;
134 int retv = -ENOPROTOOPT;
135
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 if (optval == NULL)
137 val=0;
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900138 else {
139 if (optlen >= sizeof(int)) {
140 if (get_user(val, (int __user *) optval))
141 return -EFAULT;
142 } else
143 val = 0;
144 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
146 valbool = (val!=0);
147
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900148 if (ip6_mroute_opt(optname))
149 return ip6_mroute_setsockopt(sk, optname, optval, optlen);
150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 lock_sock(sk);
152
153 switch (optname) {
154
155 case IPV6_ADDRFORM:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900156 if (optlen < sizeof(int))
157 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 if (val == PF_INET) {
159 struct ipv6_txoptions *opt;
160 struct sk_buff *pktopt;
161
Denis V. Lunev49d074f2008-06-04 15:49:06 +0400162 if (sk->sk_type == SOCK_RAW)
163 break;
164
Denis V. Lunev9596cc822008-06-04 15:49:08 +0400165 if (sk->sk_protocol == IPPROTO_UDP ||
166 sk->sk_protocol == IPPROTO_UDPLITE) {
167 struct udp_sock *up = udp_sk(sk);
168 if (up->pending == AF_INET6) {
169 retv = -EBUSY;
170 break;
171 }
172 } else if (sk->sk_protocol != IPPROTO_TCP)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 break;
174
175 if (sk->sk_state != TCP_ESTABLISHED) {
176 retv = -ENOTCONN;
177 break;
178 }
179
180 if (ipv6_only_sock(sk) ||
Brian Haleye773e4f2007-08-24 23:16:08 -0700181 !ipv6_addr_v4mapped(&np->daddr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 retv = -EADDRNOTAVAIL;
183 break;
184 }
185
186 fl6_free_socklist(sk);
187 ipv6_sock_mc_close(sk);
188
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700189 /*
190 * Sock is moving from IPv6 to IPv4 (sk_prot), so
191 * remove it from the refcnt debug socks count in the
192 * original family...
193 */
194 sk_refcnt_debug_dec(sk);
195
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 if (sk->sk_protocol == IPPROTO_TCP) {
Arnaldo Carvalho de Melod83d8462005-12-13 23:26:10 -0800197 struct inet_connection_sock *icsk = inet_csk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 local_bh_disable();
Pavel Emelyanovc29a0bc2008-03-31 19:41:46 -0700199 sock_prot_inuse_add(net, sk->sk_prot, -1);
200 sock_prot_inuse_add(net, &tcp_prot, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 local_bh_enable();
202 sk->sk_prot = &tcp_prot;
Arnaldo Carvalho de Melod83d8462005-12-13 23:26:10 -0800203 icsk->icsk_af_ops = &ipv4_specific;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 sk->sk_socket->ops = &inet_stream_ops;
205 sk->sk_family = PF_INET;
Arnaldo Carvalho de Melod83d8462005-12-13 23:26:10 -0800206 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 } else {
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800208 struct proto *prot = &udp_prot;
209
David S. Millerdb8dac22008-03-06 16:22:02 -0800210 if (sk->sk_protocol == IPPROTO_UDPLITE)
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800211 prot = &udplite_prot;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 local_bh_disable();
Pavel Emelyanovc29a0bc2008-03-31 19:41:46 -0700213 sock_prot_inuse_add(net, sk->sk_prot, -1);
214 sock_prot_inuse_add(net, prot, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 local_bh_enable();
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800216 sk->sk_prot = prot;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 sk->sk_socket->ops = &inet_dgram_ops;
218 sk->sk_family = PF_INET;
219 }
220 opt = xchg(&np->opt, NULL);
221 if (opt)
222 sock_kfree_s(sk, opt, opt->tot_len);
223 pktopt = xchg(&np->pktoptions, NULL);
224 if (pktopt)
225 kfree_skb(pktopt);
226
227 sk->sk_destruct = inet_sock_destruct;
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700228 /*
229 * ... and add it to the refcnt debug socks count
230 * in the new family. -acme
231 */
232 sk_refcnt_debug_inc(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 module_put(THIS_MODULE);
234 retv = 0;
235 break;
236 }
237 goto e_inval;
238
239 case IPV6_V6ONLY:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900240 if (optlen < sizeof(int) ||
241 inet_sk(sk)->num)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 goto e_inval;
243 np->ipv6only = valbool;
244 retv = 0;
245 break;
246
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900247 case IPV6_RECVPKTINFO:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900248 if (optlen < sizeof(int))
249 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 np->rxopt.bits.rxinfo = valbool;
251 retv = 0;
252 break;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900253
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900254 case IPV6_2292PKTINFO:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900255 if (optlen < sizeof(int))
256 goto e_inval;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900257 np->rxopt.bits.rxoinfo = valbool;
258 retv = 0;
259 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900261 case IPV6_RECVHOPLIMIT:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900262 if (optlen < sizeof(int))
263 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 np->rxopt.bits.rxhlim = valbool;
265 retv = 0;
266 break;
267
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900268 case IPV6_2292HOPLIMIT:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900269 if (optlen < sizeof(int))
270 goto e_inval;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900271 np->rxopt.bits.rxohlim = valbool;
272 retv = 0;
273 break;
274
275 case IPV6_RECVRTHDR:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900276 if (optlen < sizeof(int))
277 goto e_inval;
YOSHIFUJI Hideaki4c752092007-05-23 13:28:48 +0900278 np->rxopt.bits.srcrt = valbool;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 retv = 0;
280 break;
281
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900282 case IPV6_2292RTHDR:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900283 if (optlen < sizeof(int))
284 goto e_inval;
YOSHIFUJI Hideaki4c752092007-05-23 13:28:48 +0900285 np->rxopt.bits.osrcrt = valbool;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900286 retv = 0;
287 break;
288
289 case IPV6_RECVHOPOPTS:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900290 if (optlen < sizeof(int))
291 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 np->rxopt.bits.hopopts = valbool;
293 retv = 0;
294 break;
295
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900296 case IPV6_2292HOPOPTS:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900297 if (optlen < sizeof(int))
298 goto e_inval;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900299 np->rxopt.bits.ohopopts = valbool;
300 retv = 0;
301 break;
302
303 case IPV6_RECVDSTOPTS:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900304 if (optlen < sizeof(int))
305 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 np->rxopt.bits.dstopts = valbool;
307 retv = 0;
308 break;
309
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900310 case IPV6_2292DSTOPTS:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900311 if (optlen < sizeof(int))
312 goto e_inval;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900313 np->rxopt.bits.odstopts = valbool;
314 retv = 0;
315 break;
316
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900317 case IPV6_TCLASS:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900318 if (optlen < sizeof(int))
319 goto e_inval;
Remi Denis-Courmontd0ee0112006-09-13 20:08:07 -0700320 if (val < -1 || val > 0xff)
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900321 goto e_inval;
322 np->tclass = val;
323 retv = 0;
324 break;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900325
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900326 case IPV6_RECVTCLASS:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900327 if (optlen < sizeof(int))
328 goto e_inval;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900329 np->rxopt.bits.rxtclass = valbool;
330 retv = 0;
331 break;
332
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 case IPV6_FLOWINFO:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900334 if (optlen < sizeof(int))
335 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 np->rxopt.bits.rxflow = valbool;
337 retv = 0;
338 break;
339
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900340 case IPV6_HOPOPTS:
341 case IPV6_RTHDRDSTOPTS:
342 case IPV6_RTHDR:
343 case IPV6_DSTOPTS:
344 {
345 struct ipv6_txoptions *opt;
Shan Weiaea74272008-06-19 16:29:39 -0700346
347 /* remove any sticky options header with a zero option
348 * length, per RFC3542.
349 */
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900350 if (optlen == 0)
Luiz Capitulinocb422c42005-11-14 21:43:36 -0800351 optval = NULL;
Shan Weiaea74272008-06-19 16:29:39 -0700352 else if (optlen < sizeof(struct ipv6_opt_hdr) ||
353 optlen & 0x7 || optlen > 8 * 255)
354 goto e_inval;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900355
356 /* hop-by-hop / destination options are privileged option */
357 retv = -EPERM;
358 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
359 break;
360
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900361 opt = ipv6_renew_options(sk, np->opt, optname,
362 (struct ipv6_opt_hdr __user *)optval,
363 optlen);
364 if (IS_ERR(opt)) {
365 retv = PTR_ERR(opt);
366 break;
367 }
368
369 /* routing header option needs extra check */
Olaf Kirchdfee0a72007-03-09 13:55:38 -0800370 if (optname == IPV6_RTHDR && opt && opt->srcrt) {
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900371 struct ipv6_rt_hdr *rthdr = opt->srcrt;
Masahide NAKAMURA280a9d32006-08-23 19:17:12 -0700372 switch (rthdr->type) {
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700373#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
Masahide NAKAMURA280a9d32006-08-23 19:17:12 -0700374 case IPV6_SRCRT_TYPE_2:
Masahide NAKAMURA280a9d32006-08-23 19:17:12 -0700375 break;
YOSHIFUJI Hideakibb4dbf92007-07-10 22:55:49 -0700376#endif
Masahide NAKAMURA280a9d32006-08-23 19:17:12 -0700377 default:
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900378 goto sticky_done;
Masahide NAKAMURA280a9d32006-08-23 19:17:12 -0700379 }
380
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900381 if ((rthdr->hdrlen & 1) ||
382 (rthdr->hdrlen >> 1) != rthdr->segments_left)
383 goto sticky_done;
384 }
385
386 retv = 0;
YOSHIFUJI Hideakie7712f12008-04-13 23:21:52 -0700387 opt = ipv6_update_options(sk, opt);
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900388sticky_done:
389 if (opt)
390 sock_kfree_s(sk, opt, opt->tot_len);
391 break;
392 }
393
394 case IPV6_2292PKTOPTIONS:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 {
396 struct ipv6_txoptions *opt = NULL;
397 struct msghdr msg;
398 struct flowi fl;
399 int junk;
400
401 fl.fl6_flowlabel = 0;
402 fl.oif = sk->sk_bound_dev_if;
403
404 if (optlen == 0)
405 goto update;
406
407 /* 1K is probably excessive
408 * 1K is surely not enough, 2K per standard header is 16K.
409 */
410 retv = -EINVAL;
411 if (optlen > 64*1024)
412 break;
413
414 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
415 retv = -ENOBUFS;
416 if (opt == NULL)
417 break;
418
419 memset(opt, 0, sizeof(*opt));
420 opt->tot_len = sizeof(*opt) + optlen;
421 retv = -EFAULT;
422 if (copy_from_user(opt+1, optval, optlen))
423 goto done;
424
425 msg.msg_controllen = optlen;
426 msg.msg_control = (void*)(opt+1);
427
YOSHIFUJI Hideaki91e19082008-06-04 13:02:49 +0900428 retv = datagram_send_ctl(net, &msg, &fl, opt, &junk, &junk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 if (retv)
430 goto done;
431update:
432 retv = 0;
YOSHIFUJI Hideakie7712f12008-04-13 23:21:52 -0700433 opt = ipv6_update_options(sk, opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434done:
435 if (opt)
436 sock_kfree_s(sk, opt, opt->tot_len);
437 break;
438 }
439 case IPV6_UNICAST_HOPS:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900440 if (optlen < sizeof(int))
441 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 if (val > 255 || val < -1)
443 goto e_inval;
444 np->hop_limit = val;
445 retv = 0;
446 break;
447
448 case IPV6_MULTICAST_HOPS:
449 if (sk->sk_type == SOCK_STREAM)
YOSHIFUJI Hideaki17176992008-06-12 03:27:26 +0900450 break;
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900451 if (optlen < sizeof(int))
452 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 if (val > 255 || val < -1)
454 goto e_inval;
455 np->mcast_hops = val;
456 retv = 0;
457 break;
458
459 case IPV6_MULTICAST_LOOP:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900460 if (optlen < sizeof(int))
461 goto e_inval;
YOSHIFUJI Hideaki28d44882008-06-12 03:14:51 +0900462 if (val != valbool)
463 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 np->mc_loop = valbool;
465 retv = 0;
466 break;
467
468 case IPV6_MULTICAST_IF:
469 if (sk->sk_type == SOCK_STREAM)
YOSHIFUJI Hideaki17176992008-06-12 03:27:26 +0900470 break;
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900471 if (optlen < sizeof(int))
472 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
Brian Haley4953f0f2007-10-11 14:39:29 -0700474 if (val) {
475 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
476 goto e_inval;
477
Daniel Lezcano8a3edd82008-03-07 11:14:16 -0800478 if (__dev_get_by_index(net, val) == NULL) {
Brian Haley4953f0f2007-10-11 14:39:29 -0700479 retv = -ENODEV;
480 break;
481 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 }
483 np->mcast_oif = val;
484 retv = 0;
485 break;
486 case IPV6_ADD_MEMBERSHIP:
487 case IPV6_DROP_MEMBERSHIP:
488 {
489 struct ipv6_mreq mreq;
490
Wang Chena28398b2008-04-07 09:42:07 +0800491 if (optlen < sizeof(struct ipv6_mreq))
492 goto e_inval;
493
Flavio Leitnera96fb492007-08-24 22:16:39 -0700494 retv = -EPROTO;
495 if (inet_sk(sk)->is_icsk)
496 break;
497
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 retv = -EFAULT;
499 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
500 break;
501
502 if (optname == IPV6_ADD_MEMBERSHIP)
503 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
504 else
505 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
506 break;
507 }
508 case IPV6_JOIN_ANYCAST:
509 case IPV6_LEAVE_ANYCAST:
510 {
511 struct ipv6_mreq mreq;
512
Wang Chena28398b2008-04-07 09:42:07 +0800513 if (optlen < sizeof(struct ipv6_mreq))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 goto e_inval;
515
516 retv = -EFAULT;
517 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
518 break;
519
520 if (optname == IPV6_JOIN_ANYCAST)
521 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
522 else
523 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
524 break;
525 }
526 case MCAST_JOIN_GROUP:
527 case MCAST_LEAVE_GROUP:
528 {
529 struct group_req greq;
530 struct sockaddr_in6 *psin6;
531
Wang Chena28398b2008-04-07 09:42:07 +0800532 if (optlen < sizeof(struct group_req))
533 goto e_inval;
534
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 retv = -EFAULT;
536 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
537 break;
538 if (greq.gr_group.ss_family != AF_INET6) {
539 retv = -EADDRNOTAVAIL;
540 break;
541 }
542 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
543 if (optname == MCAST_JOIN_GROUP)
544 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
545 &psin6->sin6_addr);
546 else
547 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
548 &psin6->sin6_addr);
549 break;
550 }
551 case MCAST_JOIN_SOURCE_GROUP:
552 case MCAST_LEAVE_SOURCE_GROUP:
553 case MCAST_BLOCK_SOURCE:
554 case MCAST_UNBLOCK_SOURCE:
555 {
556 struct group_source_req greqs;
557 int omode, add;
558
Wang Chena28398b2008-04-07 09:42:07 +0800559 if (optlen < sizeof(struct group_source_req))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 goto e_inval;
561 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
562 retv = -EFAULT;
563 break;
564 }
565 if (greqs.gsr_group.ss_family != AF_INET6 ||
566 greqs.gsr_source.ss_family != AF_INET6) {
567 retv = -EADDRNOTAVAIL;
568 break;
569 }
570 if (optname == MCAST_BLOCK_SOURCE) {
571 omode = MCAST_EXCLUDE;
572 add = 1;
573 } else if (optname == MCAST_UNBLOCK_SOURCE) {
574 omode = MCAST_EXCLUDE;
575 add = 0;
576 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
577 struct sockaddr_in6 *psin6;
578
579 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
580 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
581 &psin6->sin6_addr);
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700582 /* prior join w/ different source is ok */
583 if (retv && retv != -EADDRINUSE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 break;
585 omode = MCAST_INCLUDE;
586 add = 1;
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700587 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 omode = MCAST_INCLUDE;
589 add = 0;
590 }
591 retv = ip6_mc_source(add, omode, sk, &greqs);
592 break;
593 }
594 case MCAST_MSFILTER:
595 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 extern int sysctl_mld_max_msf;
597 struct group_filter *gsf;
598
599 if (optlen < GROUP_FILTER_SIZE(0))
600 goto e_inval;
601 if (optlen > sysctl_optmem_max) {
602 retv = -ENOBUFS;
603 break;
604 }
Kris Katterjohn8b3a7002006-01-11 15:56:43 -0800605 gsf = kmalloc(optlen,GFP_KERNEL);
Stephen Hemmingercfcabdc2007-10-09 01:59:42 -0700606 if (!gsf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 retv = -ENOBUFS;
608 break;
609 }
610 retv = -EFAULT;
611 if (copy_from_user(gsf, optval, optlen)) {
612 kfree(gsf);
613 break;
614 }
615 /* numsrc >= (4G-140)/128 overflow in 32 bits */
616 if (gsf->gf_numsrc >= 0x1ffffffU ||
617 gsf->gf_numsrc > sysctl_mld_max_msf) {
618 kfree(gsf);
619 retv = -ENOBUFS;
620 break;
621 }
622 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
623 kfree(gsf);
624 retv = -EINVAL;
625 break;
626 }
627 retv = ip6_mc_msfilter(sk, gsf);
628 kfree(gsf);
629
630 break;
631 }
632 case IPV6_ROUTER_ALERT:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900633 if (optlen < sizeof(int))
634 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 retv = ip6_ra_control(sk, val, NULL);
636 break;
637 case IPV6_MTU_DISCOVER:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900638 if (optlen < sizeof(int))
639 goto e_inval;
John Heffner628a5c52007-04-20 15:53:27 -0700640 if (val<0 || val>3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 goto e_inval;
642 np->pmtudisc = val;
643 retv = 0;
644 break;
645 case IPV6_MTU:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900646 if (optlen < sizeof(int))
647 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 if (val && val < IPV6_MIN_MTU)
649 goto e_inval;
650 np->frag_size = val;
651 retv = 0;
652 break;
653 case IPV6_RECVERR:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900654 if (optlen < sizeof(int))
655 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 np->recverr = valbool;
657 if (!val)
658 skb_queue_purge(&sk->sk_error_queue);
659 retv = 0;
660 break;
661 case IPV6_FLOWINFO_SEND:
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900662 if (optlen < sizeof(int))
663 goto e_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 np->sndflow = valbool;
665 retv = 0;
666 break;
667 case IPV6_FLOWLABEL_MGR:
668 retv = ipv6_flowlabel_opt(sk, optval, optlen);
669 break;
670 case IPV6_IPSEC_POLICY:
671 case IPV6_XFRM_POLICY:
Herbert Xu6fc0b4a2005-08-06 06:33:15 -0700672 retv = -EPERM;
673 if (!capable(CAP_NET_ADMIN))
674 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 retv = xfrm_user_policy(sk, optname, optval, optlen);
676 break;
677
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +0900678 case IPV6_ADDR_PREFERENCES:
679 {
680 unsigned int pref = 0;
681 unsigned int prefmask = ~0;
682
YOSHIFUJI Hideakib2a9d7c2008-04-12 12:59:42 +0900683 if (optlen < sizeof(int))
684 goto e_inval;
685
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +0900686 retv = -EINVAL;
687
688 /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */
689 switch (val & (IPV6_PREFER_SRC_PUBLIC|
690 IPV6_PREFER_SRC_TMP|
691 IPV6_PREFER_SRC_PUBTMP_DEFAULT)) {
692 case IPV6_PREFER_SRC_PUBLIC:
693 pref |= IPV6_PREFER_SRC_PUBLIC;
694 break;
695 case IPV6_PREFER_SRC_TMP:
696 pref |= IPV6_PREFER_SRC_TMP;
697 break;
698 case IPV6_PREFER_SRC_PUBTMP_DEFAULT:
699 break;
700 case 0:
701 goto pref_skip_pubtmp;
702 default:
703 goto e_inval;
704 }
705
706 prefmask &= ~(IPV6_PREFER_SRC_PUBLIC|
707 IPV6_PREFER_SRC_TMP);
708pref_skip_pubtmp:
709
710 /* check HOME/COA conflicts */
711 switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) {
712 case IPV6_PREFER_SRC_HOME:
713 break;
714 case IPV6_PREFER_SRC_COA:
715 pref |= IPV6_PREFER_SRC_COA;
716 case 0:
717 goto pref_skip_coa;
718 default:
719 goto e_inval;
720 }
721
722 prefmask &= ~IPV6_PREFER_SRC_COA;
723pref_skip_coa:
724
725 /* check CGA/NONCGA conflicts */
726 switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) {
727 case IPV6_PREFER_SRC_CGA:
728 case IPV6_PREFER_SRC_NONCGA:
729 case 0:
730 break;
731 default:
732 goto e_inval;
733 }
734
735 np->srcprefs = (np->srcprefs & prefmask) | pref;
736 retv = 0;
737
738 break;
739 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 }
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +0900741
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 release_sock(sk);
743
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 return retv;
745
746e_inval:
747 release_sock(sk);
748 return -EINVAL;
749}
750
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800751int ipv6_setsockopt(struct sock *sk, int level, int optname,
752 char __user *optval, int optlen)
753{
754 int err;
755
756 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
757 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
758
759 if (level != SOL_IPV6)
760 return -ENOPROTOOPT;
761
762 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
763#ifdef CONFIG_NETFILTER
764 /* we need to exclude all possible ENOPROTOOPTs except default case */
765 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
766 optname != IPV6_XFRM_POLICY) {
767 lock_sock(sk);
768 err = nf_setsockopt(sk, PF_INET6, optname, optval,
769 optlen);
770 release_sock(sk);
771 }
772#endif
773 return err;
774}
775
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900776EXPORT_SYMBOL(ipv6_setsockopt);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800777
778#ifdef CONFIG_COMPAT
779int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800780 char __user *optval, int optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800781{
782 int err;
783
784 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800785 if (udp_prot.compat_setsockopt != NULL)
786 return udp_prot.compat_setsockopt(sk, level, optname,
787 optval, optlen);
788 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800789 }
790
791 if (level != SOL_IPV6)
792 return -ENOPROTOOPT;
793
David L Stevensdae50292008-04-27 01:06:07 -0700794 if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER)
795 return compat_mc_setsockopt(sk, level, optname, optval, optlen,
796 ipv6_setsockopt);
797
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800798 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
799#ifdef CONFIG_NETFILTER
800 /* we need to exclude all possible ENOPROTOOPTs except default case */
801 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800802 optname != IPV6_XFRM_POLICY) {
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800803 lock_sock(sk);
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800804 err = compat_nf_setsockopt(sk, PF_INET6, optname,
805 optval, optlen);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800806 release_sock(sk);
807 }
808#endif
809 return err;
810}
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800811
812EXPORT_SYMBOL(compat_ipv6_setsockopt);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800813#endif
814
David S. Miller286930792007-03-07 12:50:46 -0800815static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
YOSHIFUJI Hideaki4c6510a2007-03-18 17:35:57 -0700816 int optname, char __user *optval, int len)
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900817{
David S. Miller286930792007-03-07 12:50:46 -0800818 struct ipv6_opt_hdr *hdr;
819
YOSHIFUJI Hideaki4c6510a2007-03-18 17:35:57 -0700820 if (!opt)
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900821 return 0;
YOSHIFUJI Hideaki4c6510a2007-03-18 17:35:57 -0700822
823 switch(optname) {
824 case IPV6_HOPOPTS:
825 hdr = opt->hopopt;
826 break;
827 case IPV6_RTHDRDSTOPTS:
828 hdr = opt->dst0opt;
829 break;
830 case IPV6_RTHDR:
831 hdr = (struct ipv6_opt_hdr *)opt->srcrt;
832 break;
833 case IPV6_DSTOPTS:
834 hdr = opt->dst1opt;
835 break;
836 default:
837 return -EINVAL; /* should not happen */
838 }
839
840 if (!hdr)
841 return 0;
David S. Miller286930792007-03-07 12:50:46 -0800842
Chris Wrightd2b02ed2007-03-09 16:19:17 -0800843 len = min_t(unsigned int, len, ipv6_optlen(hdr));
Ilpo Järvinen660adc62007-08-15 15:07:30 -0700844 if (copy_to_user(optval, hdr, len))
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900845 return -EFAULT;
Yang Hongyang95b496b2008-05-28 16:27:28 +0800846 return len;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900847}
848
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800849static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850 char __user *optval, int __user *optlen)
851{
852 struct ipv6_pinfo *np = inet6_sk(sk);
853 int len;
854 int val;
855
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900856 if (ip6_mroute_opt(optname))
857 return ip6_mroute_getsockopt(sk, optname, optval, optlen);
858
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859 if (get_user(len, optlen))
860 return -EFAULT;
861 switch (optname) {
862 case IPV6_ADDRFORM:
863 if (sk->sk_protocol != IPPROTO_UDP &&
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800864 sk->sk_protocol != IPPROTO_UDPLITE &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865 sk->sk_protocol != IPPROTO_TCP)
YOSHIFUJI Hideaki17176992008-06-12 03:27:26 +0900866 return -ENOPROTOOPT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 if (sk->sk_state != TCP_ESTABLISHED)
868 return -ENOTCONN;
869 val = sk->sk_family;
870 break;
871 case MCAST_MSFILTER:
872 {
873 struct group_filter gsf;
874 int err;
875
876 if (len < GROUP_FILTER_SIZE(0))
877 return -EINVAL;
878 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
879 return -EFAULT;
YOSHIFUJI Hideaki20c61fb2008-04-28 14:40:55 +0900880 if (gsf.gf_group.ss_family != AF_INET6)
881 return -EADDRNOTAVAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882 lock_sock(sk);
883 err = ip6_mc_msfget(sk, &gsf,
884 (struct group_filter __user *)optval, optlen);
885 release_sock(sk);
886 return err;
887 }
888
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900889 case IPV6_2292PKTOPTIONS:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890 {
891 struct msghdr msg;
892 struct sk_buff *skb;
893
894 if (sk->sk_type != SOCK_STREAM)
895 return -ENOPROTOOPT;
896
897 msg.msg_control = optval;
898 msg.msg_controllen = len;
899 msg.msg_flags = 0;
900
901 lock_sock(sk);
902 skb = np->pktoptions;
903 if (skb)
904 atomic_inc(&skb->users);
905 release_sock(sk);
906
907 if (skb) {
908 int err = datagram_recv_ctl(sk, &msg, skb);
909 kfree_skb(skb);
910 if (err)
911 return err;
912 } else {
913 if (np->rxopt.bits.rxinfo) {
914 struct in6_pktinfo src_info;
915 src_info.ipi6_ifindex = np->mcast_oif;
916 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
917 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
918 }
919 if (np->rxopt.bits.rxhlim) {
920 int hlim = np->mcast_hops;
921 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
922 }
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900923 if (np->rxopt.bits.rxoinfo) {
924 struct in6_pktinfo src_info;
925 src_info.ipi6_ifindex = np->mcast_oif;
926 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
927 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
928 }
929 if (np->rxopt.bits.rxohlim) {
930 int hlim = np->mcast_hops;
931 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
932 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933 }
934 len -= msg.msg_controllen;
935 return put_user(len, optlen);
936 }
937 case IPV6_MTU:
938 {
939 struct dst_entry *dst;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900940 val = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 lock_sock(sk);
942 dst = sk_dst_get(sk);
943 if (dst) {
944 val = dst_mtu(dst);
945 dst_release(dst);
946 }
947 release_sock(sk);
948 if (!val)
949 return -ENOTCONN;
950 break;
951 }
952
953 case IPV6_V6ONLY:
954 val = np->ipv6only;
955 break;
956
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900957 case IPV6_RECVPKTINFO:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958 val = np->rxopt.bits.rxinfo;
959 break;
960
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900961 case IPV6_2292PKTINFO:
962 val = np->rxopt.bits.rxoinfo;
963 break;
964
965 case IPV6_RECVHOPLIMIT:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 val = np->rxopt.bits.rxhlim;
967 break;
968
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900969 case IPV6_2292HOPLIMIT:
970 val = np->rxopt.bits.rxohlim;
971 break;
972
973 case IPV6_RECVRTHDR:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 val = np->rxopt.bits.srcrt;
975 break;
976
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900977 case IPV6_2292RTHDR:
978 val = np->rxopt.bits.osrcrt;
979 break;
980
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981 case IPV6_HOPOPTS:
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900982 case IPV6_RTHDRDSTOPTS:
983 case IPV6_RTHDR:
984 case IPV6_DSTOPTS:
985 {
986
987 lock_sock(sk);
David S. Miller286930792007-03-07 12:50:46 -0800988 len = ipv6_getsockopt_sticky(sk, np->opt,
YOSHIFUJI Hideaki4c6510a2007-03-18 17:35:57 -0700989 optname, optval, len);
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900990 release_sock(sk);
Yang Hongyang05335c22008-05-28 16:23:47 +0800991 /* check if ipv6_getsockopt_sticky() returns err code */
992 if (len < 0)
993 return len;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900994 return put_user(len, optlen);
995 }
996
997 case IPV6_RECVHOPOPTS:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998 val = np->rxopt.bits.hopopts;
999 break;
1000
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +09001001 case IPV6_2292HOPOPTS:
1002 val = np->rxopt.bits.ohopopts;
1003 break;
1004
1005 case IPV6_RECVDSTOPTS:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 val = np->rxopt.bits.dstopts;
1007 break;
1008
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +09001009 case IPV6_2292DSTOPTS:
1010 val = np->rxopt.bits.odstopts;
1011 break;
1012
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +09001013 case IPV6_TCLASS:
1014 val = np->tclass;
Remi Denis-Courmontd0ee0112006-09-13 20:08:07 -07001015 if (val < 0)
1016 val = 0;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +09001017 break;
1018
1019 case IPV6_RECVTCLASS:
1020 val = np->rxopt.bits.rxtclass;
1021 break;
1022
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 case IPV6_FLOWINFO:
1024 val = np->rxopt.bits.rxflow;
1025 break;
1026
1027 case IPV6_UNICAST_HOPS:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028 case IPV6_MULTICAST_HOPS:
Brian Haleybefffe92006-12-12 17:09:49 -08001029 {
1030 struct dst_entry *dst;
1031
1032 if (optname == IPV6_UNICAST_HOPS)
1033 val = np->hop_limit;
1034 else
1035 val = np->mcast_hops;
1036
1037 dst = sk_dst_get(sk);
1038 if (dst) {
1039 if (val < 0)
YOSHIFUJI Hideaki6b75d092008-03-10 06:00:30 -04001040 val = ip6_dst_hoplimit(dst);
Brian Haleybefffe92006-12-12 17:09:49 -08001041 dst_release(dst);
1042 }
1043 if (val < 0)
1044 val = ipv6_devconf.hop_limit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 break;
Brian Haleybefffe92006-12-12 17:09:49 -08001046 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047
1048 case IPV6_MULTICAST_LOOP:
1049 val = np->mc_loop;
1050 break;
1051
1052 case IPV6_MULTICAST_IF:
1053 val = np->mcast_oif;
1054 break;
1055
1056 case IPV6_MTU_DISCOVER:
1057 val = np->pmtudisc;
1058 break;
1059
1060 case IPV6_RECVERR:
1061 val = np->recverr;
1062 break;
1063
1064 case IPV6_FLOWINFO_SEND:
1065 val = np->sndflow;
1066 break;
1067
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001068 case IPV6_ADDR_PREFERENCES:
1069 val = 0;
1070
1071 if (np->srcprefs & IPV6_PREFER_SRC_TMP)
1072 val |= IPV6_PREFER_SRC_TMP;
1073 else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC)
1074 val |= IPV6_PREFER_SRC_PUBLIC;
1075 else {
1076 /* XXX: should we return system default? */
1077 val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT;
1078 }
1079
1080 if (np->srcprefs & IPV6_PREFER_SRC_COA)
1081 val |= IPV6_PREFER_SRC_COA;
1082 else
1083 val |= IPV6_PREFER_SRC_HOME;
1084 break;
1085
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 default:
Wei Yongjuncf6fc4a2007-12-16 13:39:57 -08001087 return -ENOPROTOOPT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 }
1089 len = min_t(unsigned int, sizeof(int), len);
1090 if(put_user(len, optlen))
1091 return -EFAULT;
1092 if(copy_to_user(optval,&val,len))
1093 return -EFAULT;
1094 return 0;
1095}
1096
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001097int ipv6_getsockopt(struct sock *sk, int level, int optname,
1098 char __user *optval, int __user *optlen)
1099{
1100 int err;
1101
1102 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
1103 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1104
1105 if(level != SOL_IPV6)
1106 return -ENOPROTOOPT;
1107
1108 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1109#ifdef CONFIG_NETFILTER
Wei Yongjuncf6fc4a2007-12-16 13:39:57 -08001110 /* we need to exclude all possible ENOPROTOOPTs except default case */
1111 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001112 int len;
1113
1114 if (get_user(len, optlen))
1115 return -EFAULT;
1116
1117 lock_sock(sk);
1118 err = nf_getsockopt(sk, PF_INET6, optname, optval,
1119 &len);
1120 release_sock(sk);
1121 if (err >= 0)
1122 err = put_user(len, optlen);
1123 }
1124#endif
1125 return err;
1126}
1127
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +09001128EXPORT_SYMBOL(ipv6_getsockopt);
1129
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001130#ifdef CONFIG_COMPAT
1131int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001132 char __user *optval, int __user *optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001133{
1134 int err;
1135
1136 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001137 if (udp_prot.compat_getsockopt != NULL)
1138 return udp_prot.compat_getsockopt(sk, level, optname,
1139 optval, optlen);
1140 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001141 }
1142
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001143 if (level != SOL_IPV6)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001144 return -ENOPROTOOPT;
1145
Pavel Emelyanov80991792008-04-30 14:49:54 -07001146 if (optname == MCAST_MSFILTER)
1147 return compat_mc_getsockopt(sk, level, optname, optval, optlen,
1148 ipv6_getsockopt);
1149
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001150 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1151#ifdef CONFIG_NETFILTER
Wei Yongjuncf6fc4a2007-12-16 13:39:57 -08001152 /* we need to exclude all possible ENOPROTOOPTs except default case */
1153 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001154 int len;
1155
1156 if (get_user(len, optlen))
1157 return -EFAULT;
1158
1159 lock_sock(sk);
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001160 err = compat_nf_getsockopt(sk, PF_INET6,
1161 optname, optval, &len);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001162 release_sock(sk);
1163 if (err >= 0)
1164 err = put_user(len, optlen);
1165 }
1166#endif
1167 return err;
1168}
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -08001169
1170EXPORT_SYMBOL(compat_ipv6_getsockopt);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -08001171#endif
1172