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ipv6: Check IPV6_MULTICAST_LOOP option value.
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / ipv6 / ipv6_sockglue.c
CommitLineData
1da177e4
LT		 1/*
2 * IPv6 BSD socket options interface
1ab1457c 3 * Linux INET6 implementation
1da177e4
LT		 4 *
5 * Authors:
1ab1457c 6 * Pedro Roque <roque@di.fc.ul.pt>
1da177e4
LT		 7 *
8 * Based on linux/net/ipv4/ip_sockglue.c
9 *
10 * $Id: ipv6_sockglue.c,v 1.41 2002/02/01 22:01:04 davem Exp $
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
16 *
17 * FIXME: Make the setsockopt code POSIX compliant: That is
18 *
1da177e4
LT		 19 * o Truncate getsockopt returns
20 * o Return an optlen of the truncated length if need be
21 *
22 * Changes:
23 * David L Stevens <dlstevens@us.ibm.com>:
24 * - added multicast source filtering API for MLDv2
25 */
26
27#include <linux/module.h>
4fc268d2 28#include <linux/capability.h>
1da177e4
LT		 29#include <linux/errno.h>
30#include <linux/types.h>
31#include <linux/socket.h>
32#include <linux/sockios.h>
1da177e4
LT		 33#include <linux/net.h>
34#include <linux/in6.h>
7bc570c8 35#include <linux/mroute6.h>
1da177e4
LT		 36#include <linux/netdevice.h>
37#include <linux/if_arp.h>
38#include <linux/init.h>
39#include <linux/sysctl.h>
40#include <linux/netfilter.h>
41
42#include <net/sock.h>
43#include <net/snmp.h>
44#include <net/ipv6.h>
45#include <net/ndisc.h>
46#include <net/protocol.h>
47#include <net/transp_v6.h>
48#include <net/ip6_route.h>
49#include <net/addrconf.h>
50#include <net/inet_common.h>
51#include <net/tcp.h>
52#include <net/udp.h>
ba4e58ec 53#include <net/udplite.h>
1da177e4 54#include <net/xfrm.h>
dae50295 55#include <net/compat.h>
1da177e4
LT		 56
57#include <asm/uaccess.h>
58
ba89966c 59DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly;
1da177e4 60
1da177e4
LT		 61struct ip6_ra_chain *ip6_ra_chain;
62DEFINE_RWLOCK(ip6_ra_lock);
63
64int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *))
65{
66 struct ip6_ra_chain *ra, *new_ra, **rap;
67
68 /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
69 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW)
70 return -EINVAL;
71
72 new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
73
74 write_lock_bh(&ip6_ra_lock);
75 for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
76 if (ra->sk == sk) {
77 if (sel>=0) {
78 write_unlock_bh(&ip6_ra_lock);
a51482bd 79 kfree(new_ra);
1da177e4
LT		 80 return -EADDRINUSE;
81 }
82
83 *rap = ra->next;
84 write_unlock_bh(&ip6_ra_lock);
85
86 if (ra->destructor)
87 ra->destructor(sk);
88 sock_put(sk);
89 kfree(ra);
90 return 0;
91 }
92 }
93 if (new_ra == NULL) {
94 write_unlock_bh(&ip6_ra_lock);
95 return -ENOBUFS;
96 }
97 new_ra->sk = sk;
98 new_ra->sel = sel;
99 new_ra->destructor = destructor;
100 new_ra->next = ra;
101 *rap = new_ra;
102 sock_hold(sk);
103 write_unlock_bh(&ip6_ra_lock);
104 return 0;
105}
106
e7712f1a
YH		 107static
108struct ipv6_txoptions *ipv6_update_options(struct sock *sk,
109 struct ipv6_txoptions *opt)
110{
111 if (inet_sk(sk)->is_icsk) {
112 if (opt &&
113 !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
114 inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
115 struct inet_connection_sock *icsk = inet_csk(sk);
116 icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen;
117 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
118 }
119 opt = xchg(&inet6_sk(sk)->opt, opt);
120 } else {
121 write_lock(&sk->sk_dst_lock);
122 opt = xchg(&inet6_sk(sk)->opt, opt);
123 write_unlock(&sk->sk_dst_lock);
124 }
125 sk_dst_reset(sk);
126
127 return opt;
128}
129
3fdadf7d 130static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
1da177e4
LT		 131 char __user *optval, int optlen)
132{
133 struct ipv6_pinfo *np = inet6_sk(sk);
3b1e0a65 134 struct net *net = sock_net(sk);
1da177e4
LT		 135 int val, valbool;
136 int retv = -ENOPROTOOPT;
137
1da177e4
LT		 138 if (optval == NULL)
139 val=0;
b2a9d7c2
YH		 140 else {
141 if (optlen >= sizeof(int)) {
142 if (get_user(val, (int __user *) optval))
143 return -EFAULT;
144 } else
145 val = 0;
146 }
1da177e4
LT		 147
148 valbool = (val!=0);
149
7bc570c8
YH		 150 if (ip6_mroute_opt(optname))
151 return ip6_mroute_setsockopt(sk, optname, optval, optlen);
152
1da177e4
LT		 153 lock_sock(sk);
154
155 switch (optname) {
156
157 case IPV6_ADDRFORM:
b2a9d7c2
YH		 158 if (optlen < sizeof(int))
159 goto e_inval;
1da177e4
LT		 160 if (val == PF_INET) {
161 struct ipv6_txoptions *opt;
162 struct sk_buff *pktopt;
163
49d074f4
DL		 164 if (sk->sk_type == SOCK_RAW)
165 break;
166
9596cc82
DL		 167 if (sk->sk_protocol == IPPROTO_UDP ||
168 sk->sk_protocol == IPPROTO_UDPLITE) {
169 struct udp_sock *up = udp_sk(sk);
170 if (up->pending == AF_INET6) {
171 retv = -EBUSY;
172 break;
173 }
174 } else if (sk->sk_protocol != IPPROTO_TCP)
1da177e4
LT		 175 break;
176
177 if (sk->sk_state != TCP_ESTABLISHED) {
178 retv = -ENOTCONN;
179 break;
180 }
181
182 if (ipv6_only_sock(sk) ||
e773e4fa 183 !ipv6_addr_v4mapped(&np->daddr)) {
1da177e4
LT		 184 retv = -EADDRNOTAVAIL;
185 break;
186 }
187
188 fl6_free_socklist(sk);
189 ipv6_sock_mc_close(sk);
190
e6848976
ACM		 191 /*
192 * Sock is moving from IPv6 to IPv4 (sk_prot), so
193 * remove it from the refcnt debug socks count in the
194 * original family...
195 */
196 sk_refcnt_debug_dec(sk);
197
1da177e4 198 if (sk->sk_protocol == IPPROTO_TCP) {
d83d8461 199 struct inet_connection_sock *icsk = inet_csk(sk);
1da177e4 200 local_bh_disable();
c29a0bc4
PE		 201 sock_prot_inuse_add(net, sk->sk_prot, -1);
202 sock_prot_inuse_add(net, &tcp_prot, 1);
1da177e4
LT		 203 local_bh_enable();
204 sk->sk_prot = &tcp_prot;
d83d8461 205 icsk->icsk_af_ops = &ipv4_specific;
1da177e4
LT		 206 sk->sk_socket->ops = &inet_stream_ops;
207 sk->sk_family = PF_INET;
d83d8461 208 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
1da177e4 209 } else {
ba4e58ec
GR		 210 struct proto *prot = &udp_prot;
211
db8dac20 212 if (sk->sk_protocol == IPPROTO_UDPLITE)
ba4e58ec 213 prot = &udplite_prot;
1da177e4 214 local_bh_disable();
c29a0bc4
PE		 215 sock_prot_inuse_add(net, sk->sk_prot, -1);
216 sock_prot_inuse_add(net, prot, 1);
1da177e4 217 local_bh_enable();
ba4e58ec 218 sk->sk_prot = prot;
1da177e4
LT		 219 sk->sk_socket->ops = &inet_dgram_ops;
220 sk->sk_family = PF_INET;
221 }
222 opt = xchg(&np->opt, NULL);
223 if (opt)
224 sock_kfree_s(sk, opt, opt->tot_len);
225 pktopt = xchg(&np->pktoptions, NULL);
226 if (pktopt)
227 kfree_skb(pktopt);
228
229 sk->sk_destruct = inet_sock_destruct;
e6848976
ACM		 230 /*
231 * ... and add it to the refcnt debug socks count
232 * in the new family. -acme
233 */
234 sk_refcnt_debug_inc(sk);
1da177e4
LT		 235 module_put(THIS_MODULE);
236 retv = 0;
237 break;
238 }
239 goto e_inval;
240
241 case IPV6_V6ONLY:
b2a9d7c2
YH		 242 if (optlen < sizeof(int) ||
243 inet_sk(sk)->num)
1da177e4
LT		 244 goto e_inval;
245 np->ipv6only = valbool;
246 retv = 0;
247 break;
248
333fad53 249 case IPV6_RECVPKTINFO:
b2a9d7c2
YH		 250 if (optlen < sizeof(int))
251 goto e_inval;
1da177e4
LT		 252 np->rxopt.bits.rxinfo = valbool;
253 retv = 0;
254 break;
1ab1457c 255
333fad53 256 case IPV6_2292PKTINFO:
b2a9d7c2
YH		 257 if (optlen < sizeof(int))
258 goto e_inval;
333fad53
YH		 259 np->rxopt.bits.rxoinfo = valbool;
260 retv = 0;
261 break;
1da177e4 262
333fad53 263 case IPV6_RECVHOPLIMIT:
b2a9d7c2
YH		 264 if (optlen < sizeof(int))
265 goto e_inval;
1da177e4
LT		 266 np->rxopt.bits.rxhlim = valbool;
267 retv = 0;
268 break;
269
333fad53 270 case IPV6_2292HOPLIMIT:
b2a9d7c2
YH		 271 if (optlen < sizeof(int))
272 goto e_inval;
333fad53
YH		 273 np->rxopt.bits.rxohlim = valbool;
274 retv = 0;
275 break;
276
277 case IPV6_RECVRTHDR:
b2a9d7c2
YH		 278 if (optlen < sizeof(int))
279 goto e_inval;
4c752098 280 np->rxopt.bits.srcrt = valbool;
1da177e4
LT		 281 retv = 0;
282 break;
283
333fad53 284 case IPV6_2292RTHDR:
b2a9d7c2
YH		 285 if (optlen < sizeof(int))
286 goto e_inval;
4c752098 287 np->rxopt.bits.osrcrt = valbool;
333fad53
YH		 288 retv = 0;
289 break;
290
291 case IPV6_RECVHOPOPTS:
b2a9d7c2
YH		 292 if (optlen < sizeof(int))
293 goto e_inval;
1da177e4
LT		 294 np->rxopt.bits.hopopts = valbool;
295 retv = 0;
296 break;
297
333fad53 298 case IPV6_2292HOPOPTS:
b2a9d7c2
YH		 299 if (optlen < sizeof(int))
300 goto e_inval;
333fad53
YH		 301 np->rxopt.bits.ohopopts = valbool;
302 retv = 0;
303 break;
304
305 case IPV6_RECVDSTOPTS:
b2a9d7c2
YH		 306 if (optlen < sizeof(int))
307 goto e_inval;
1da177e4
LT		 308 np->rxopt.bits.dstopts = valbool;
309 retv = 0;
310 break;
311
333fad53 312 case IPV6_2292DSTOPTS:
b2a9d7c2
YH		 313 if (optlen < sizeof(int))
314 goto e_inval;
333fad53
YH		 315 np->rxopt.bits.odstopts = valbool;
316 retv = 0;
317 break;
318
41a1f8ea 319 case IPV6_TCLASS:
b2a9d7c2
YH		 320 if (optlen < sizeof(int))
321 goto e_inval;
d0ee011f 322 if (val < -1 || val > 0xff)
41a1f8ea
YH		 323 goto e_inval;
324 np->tclass = val;
325 retv = 0;
326 break;
1ab1457c 327
41a1f8ea 328 case IPV6_RECVTCLASS:
b2a9d7c2
YH		 329 if (optlen < sizeof(int))
330 goto e_inval;
41a1f8ea
YH		 331 np->rxopt.bits.rxtclass = valbool;
332 retv = 0;
333 break;
334
1da177e4 335 case IPV6_FLOWINFO:
b2a9d7c2
YH		 336 if (optlen < sizeof(int))
337 goto e_inval;
1da177e4
LT		 338 np->rxopt.bits.rxflow = valbool;
339 retv = 0;
340 break;
341
333fad53
YH		 342 case IPV6_HOPOPTS:
343 case IPV6_RTHDRDSTOPTS:
344 case IPV6_RTHDR:
345 case IPV6_DSTOPTS:
346 {
347 struct ipv6_txoptions *opt;
348 if (optlen == 0)
cb422c46 349 optval = NULL;
333fad53
YH		 350
351 /* hop-by-hop / destination options are privileged option */
352 retv = -EPERM;
353 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
354 break;
355
b2a9d7c2
YH		 356 if (optlen < sizeof(struct ipv6_opt_hdr) ||
357 optlen & 0x7 || optlen > 8 * 255)
358 goto e_inval;
333fad53
YH		 359
360 opt = ipv6_renew_options(sk, np->opt, optname,
361 (struct ipv6_opt_hdr __user *)optval,
362 optlen);
363 if (IS_ERR(opt)) {
364 retv = PTR_ERR(opt);
365 break;
366 }
367
368 /* routing header option needs extra check */
dfee0a72 369 if (optname == IPV6_RTHDR && opt && opt->srcrt) {
333fad53 370 struct ipv6_rt_hdr *rthdr = opt->srcrt;
280a9d34 371 switch (rthdr->type) {
59fbb3a6 372#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
280a9d34 373 case IPV6_SRCRT_TYPE_2:
280a9d34 374 break;
bb4dbf9e 375#endif
280a9d34 376 default:
333fad53 377 goto sticky_done;
280a9d34
MN		 378 }
379
333fad53
YH		 380 if ((rthdr->hdrlen & 1) ||
381 (rthdr->hdrlen >> 1) != rthdr->segments_left)
382 goto sticky_done;
383 }
384
385 retv = 0;
e7712f1a 386 opt = ipv6_update_options(sk, opt);
333fad53
YH		 387sticky_done:
388 if (opt)
389 sock_kfree_s(sk, opt, opt->tot_len);
390 break;
391 }
392
393 case IPV6_2292PKTOPTIONS:
1da177e4
LT		 394 {
395 struct ipv6_txoptions *opt = NULL;
396 struct msghdr msg;
397 struct flowi fl;
398 int junk;
399
400 fl.fl6_flowlabel = 0;
401 fl.oif = sk->sk_bound_dev_if;
402
403 if (optlen == 0)
404 goto update;
405
406 /* 1K is probably excessive
407 * 1K is surely not enough, 2K per standard header is 16K.
408 */
409 retv = -EINVAL;
410 if (optlen > 64*1024)
411 break;
412
413 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
414 retv = -ENOBUFS;
415 if (opt == NULL)
416 break;
417
418 memset(opt, 0, sizeof(*opt));
419 opt->tot_len = sizeof(*opt) + optlen;
420 retv = -EFAULT;
421 if (copy_from_user(opt+1, optval, optlen))
422 goto done;
423
424 msg.msg_controllen = optlen;
425 msg.msg_control = (void*)(opt+1);
426
91e1908f 427 retv = datagram_send_ctl(net, &msg, &fl, opt, &junk, &junk);
1da177e4
LT		 428 if (retv)
429 goto done;
430update:
431 retv = 0;
e7712f1a 432 opt = ipv6_update_options(sk, opt);
1da177e4
LT		 433done:
434 if (opt)
435 sock_kfree_s(sk, opt, opt->tot_len);
436 break;
437 }
438 case IPV6_UNICAST_HOPS:
b2a9d7c2
YH		 439 if (optlen < sizeof(int))
440 goto e_inval;
1da177e4
LT		 441 if (val > 255 || val < -1)
442 goto e_inval;
443 np->hop_limit = val;
444 retv = 0;
445 break;
446
447 case IPV6_MULTICAST_HOPS:
448 if (sk->sk_type == SOCK_STREAM)
449 goto e_inval;
b2a9d7c2
YH		 450 if (optlen < sizeof(int))
451 goto e_inval;
1da177e4
LT		 452 if (val > 255 || val < -1)
453 goto e_inval;
454 np->mcast_hops = val;
455 retv = 0;
456 break;
457
458 case IPV6_MULTICAST_LOOP:
b2a9d7c2
YH		 459 if (optlen < sizeof(int))
460 goto e_inval;
28d44882
YH		 461 if (val != valbool)
462 goto e_inval;
1da177e4
LT		 463 np->mc_loop = valbool;
464 retv = 0;
465 break;
466
467 case IPV6_MULTICAST_IF:
468 if (sk->sk_type == SOCK_STREAM)
469 goto e_inval;
b2a9d7c2
YH		 470 if (optlen < sizeof(int))
471 goto e_inval;
1da177e4 472
4953f0fc
BH		 473 if (val) {
474 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
475 goto e_inval;
476
8a3edd80 477 if (__dev_get_by_index(net, val) == NULL) {
4953f0fc
BH		 478 retv = -ENODEV;
479 break;
480 }
1da177e4
LT		 481 }
482 np->mcast_oif = val;
483 retv = 0;
484 break;
485 case IPV6_ADD_MEMBERSHIP:
486 case IPV6_DROP_MEMBERSHIP:
487 {
488 struct ipv6_mreq mreq;
489
a28398ba
WC		 490 if (optlen < sizeof(struct ipv6_mreq))
491 goto e_inval;
492
a96fb49b
FL		 493 retv = -EPROTO;
494 if (inet_sk(sk)->is_icsk)
495 break;
496
1da177e4
LT		 497 retv = -EFAULT;
498 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
499 break;
500
501 if (optname == IPV6_ADD_MEMBERSHIP)
502 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
503 else
504 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
505 break;
506 }
507 case IPV6_JOIN_ANYCAST:
508 case IPV6_LEAVE_ANYCAST:
509 {
510 struct ipv6_mreq mreq;
511
a28398ba 512 if (optlen < sizeof(struct ipv6_mreq))
1da177e4
LT		 513 goto e_inval;
514
515 retv = -EFAULT;
516 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
517 break;
518
519 if (optname == IPV6_JOIN_ANYCAST)
520 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
521 else
522 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
523 break;
524 }
525 case MCAST_JOIN_GROUP:
526 case MCAST_LEAVE_GROUP:
527 {
528 struct group_req greq;
529 struct sockaddr_in6 *psin6;
530
a28398ba
WC		 531 if (optlen < sizeof(struct group_req))
532 goto e_inval;
533
1da177e4
LT		 534 retv = -EFAULT;
535 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
536 break;
537 if (greq.gr_group.ss_family != AF_INET6) {
538 retv = -EADDRNOTAVAIL;
539 break;
540 }
541 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
542 if (optname == MCAST_JOIN_GROUP)
543 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
544 &psin6->sin6_addr);
545 else
546 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
547 &psin6->sin6_addr);
548 break;
549 }
550 case MCAST_JOIN_SOURCE_GROUP:
551 case MCAST_LEAVE_SOURCE_GROUP:
552 case MCAST_BLOCK_SOURCE:
553 case MCAST_UNBLOCK_SOURCE:
554 {
555 struct group_source_req greqs;
556 int omode, add;
557
a28398ba 558 if (optlen < sizeof(struct group_source_req))
1da177e4
LT		 559 goto e_inval;
560 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
561 retv = -EFAULT;
562 break;
563 }
564 if (greqs.gsr_group.ss_family != AF_INET6 ||
565 greqs.gsr_source.ss_family != AF_INET6) {
566 retv = -EADDRNOTAVAIL;
567 break;
568 }
569 if (optname == MCAST_BLOCK_SOURCE) {
570 omode = MCAST_EXCLUDE;
571 add = 1;
572 } else if (optname == MCAST_UNBLOCK_SOURCE) {
573 omode = MCAST_EXCLUDE;
574 add = 0;
575 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
576 struct sockaddr_in6 *psin6;
577
578 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
579 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
580 &psin6->sin6_addr);
c9e3e8b6
DS		 581 /* prior join w/ different source is ok */
582 if (retv && retv != -EADDRINUSE)
1da177e4
LT		 583 break;
584 omode = MCAST_INCLUDE;
585 add = 1;
c9e3e8b6 586 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
1da177e4
LT		 587 omode = MCAST_INCLUDE;
588 add = 0;
589 }
590 retv = ip6_mc_source(add, omode, sk, &greqs);
591 break;
592 }
593 case MCAST_MSFILTER:
594 {
1da177e4
LT		 595 extern int sysctl_mld_max_msf;
596 struct group_filter *gsf;
597
598 if (optlen < GROUP_FILTER_SIZE(0))
599 goto e_inval;
600 if (optlen > sysctl_optmem_max) {
601 retv = -ENOBUFS;
602 break;
603 }
8b3a7005 604 gsf = kmalloc(optlen,GFP_KERNEL);
cfcabdcc 605 if (!gsf) {
1da177e4
LT		 606 retv = -ENOBUFS;
607 break;
608 }
609 retv = -EFAULT;
610 if (copy_from_user(gsf, optval, optlen)) {
611 kfree(gsf);
612 break;
613 }
614 /* numsrc >= (4G-140)/128 overflow in 32 bits */
615 if (gsf->gf_numsrc >= 0x1ffffffU ||
616 gsf->gf_numsrc > sysctl_mld_max_msf) {
617 kfree(gsf);
618 retv = -ENOBUFS;
619 break;
620 }
621 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
622 kfree(gsf);
623 retv = -EINVAL;
624 break;
625 }
626 retv = ip6_mc_msfilter(sk, gsf);
627 kfree(gsf);
628
629 break;
630 }
631 case IPV6_ROUTER_ALERT:
b2a9d7c2
YH		 632 if (optlen < sizeof(int))
633 goto e_inval;
1da177e4
LT		 634 retv = ip6_ra_control(sk, val, NULL);
635 break;
636 case IPV6_MTU_DISCOVER:
b2a9d7c2
YH		 637 if (optlen < sizeof(int))
638 goto e_inval;
628a5c56 639 if (val<0 || val>3)
1da177e4
LT		 640 goto e_inval;
641 np->pmtudisc = val;
642 retv = 0;
643 break;
644 case IPV6_MTU:
b2a9d7c2
YH		 645 if (optlen < sizeof(int))
646 goto e_inval;
1da177e4
LT		 647 if (val && val < IPV6_MIN_MTU)
648 goto e_inval;
649 np->frag_size = val;
650 retv = 0;
651 break;
652 case IPV6_RECVERR:
b2a9d7c2
YH		 653 if (optlen < sizeof(int))
654 goto e_inval;
1da177e4
LT		 655 np->recverr = valbool;
656 if (!val)
657 skb_queue_purge(&sk->sk_error_queue);
658 retv = 0;
659 break;
660 case IPV6_FLOWINFO_SEND:
b2a9d7c2
YH		 661 if (optlen < sizeof(int))
662 goto e_inval;
1da177e4
LT		 663 np->sndflow = valbool;
664 retv = 0;
665 break;
666 case IPV6_FLOWLABEL_MGR:
667 retv = ipv6_flowlabel_opt(sk, optval, optlen);
668 break;
669 case IPV6_IPSEC_POLICY:
670 case IPV6_XFRM_POLICY:
6fc0b4a7
HX		 671 retv = -EPERM;
672 if (!capable(CAP_NET_ADMIN))
673 break;
1da177e4
LT		 674 retv = xfrm_user_policy(sk, optname, optval, optlen);
675 break;
676
7cbca67c
YH		 677 case IPV6_ADDR_PREFERENCES:
678 {
679 unsigned int pref = 0;
680 unsigned int prefmask = ~0;
681
b2a9d7c2
YH		 682 if (optlen < sizeof(int))
683 goto e_inval;
684
7cbca67c
YH		 685 retv = -EINVAL;
686
687 /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */
688 switch (val & (IPV6_PREFER_SRC_PUBLIC|
689 IPV6_PREFER_SRC_TMP|
690 IPV6_PREFER_SRC_PUBTMP_DEFAULT)) {
691 case IPV6_PREFER_SRC_PUBLIC:
692 pref |= IPV6_PREFER_SRC_PUBLIC;
693 break;
694 case IPV6_PREFER_SRC_TMP:
695 pref |= IPV6_PREFER_SRC_TMP;
696 break;
697 case IPV6_PREFER_SRC_PUBTMP_DEFAULT:
698 break;
699 case 0:
700 goto pref_skip_pubtmp;
701 default:
702 goto e_inval;
703 }
704
705 prefmask &= ~(IPV6_PREFER_SRC_PUBLIC|
706 IPV6_PREFER_SRC_TMP);
707pref_skip_pubtmp:
708
709 /* check HOME/COA conflicts */
710 switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) {
711 case IPV6_PREFER_SRC_HOME:
712 break;
713 case IPV6_PREFER_SRC_COA:
714 pref |= IPV6_PREFER_SRC_COA;
715 case 0:
716 goto pref_skip_coa;
717 default:
718 goto e_inval;
719 }
720
721 prefmask &= ~IPV6_PREFER_SRC_COA;
722pref_skip_coa:
723
724 /* check CGA/NONCGA conflicts */
725 switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) {
726 case IPV6_PREFER_SRC_CGA:
727 case IPV6_PREFER_SRC_NONCGA:
728 case 0:
729 break;
730 default:
731 goto e_inval;
732 }
733
734 np->srcprefs = (np->srcprefs & prefmask) | pref;
735 retv = 0;
736
737 break;
738 }
1da177e4 739 }
7cbca67c 740
1da177e4
LT		 741 release_sock(sk);
742
1da177e4
LT		 743 return retv;
744
745e_inval:
746 release_sock(sk);
747 return -EINVAL;
748}
749
3fdadf7d
DM		 750int ipv6_setsockopt(struct sock *sk, int level, int optname,
751 char __user *optval, int optlen)
752{
753 int err;
754
755 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
756 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
757
758 if (level != SOL_IPV6)
759 return -ENOPROTOOPT;
760
761 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
762#ifdef CONFIG_NETFILTER
763 /* we need to exclude all possible ENOPROTOOPTs except default case */
764 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
765 optname != IPV6_XFRM_POLICY) {
766 lock_sock(sk);
767 err = nf_setsockopt(sk, PF_INET6, optname, optval,
768 optlen);
769 release_sock(sk);
770 }
771#endif
772 return err;
773}
774
7159039a 775EXPORT_SYMBOL(ipv6_setsockopt);
3fdadf7d
DM		 776
777#ifdef CONFIG_COMPAT
778int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
543d9cfe 779 char __user *optval, int optlen)
3fdadf7d
DM		 780{
781 int err;
782
783 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
543d9cfe
ACM		 784 if (udp_prot.compat_setsockopt != NULL)
785 return udp_prot.compat_setsockopt(sk, level, optname,
786 optval, optlen);
787 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
3fdadf7d
DM		 788 }
789
790 if (level != SOL_IPV6)
791 return -ENOPROTOOPT;
792
dae50295
DS		 793 if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER)
794 return compat_mc_setsockopt(sk, level, optname, optval, optlen,
795 ipv6_setsockopt);
796
3fdadf7d
DM		 797 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
798#ifdef CONFIG_NETFILTER
799 /* we need to exclude all possible ENOPROTOOPTs except default case */
800 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
543d9cfe 801 optname != IPV6_XFRM_POLICY) {
3fdadf7d 802 lock_sock(sk);
543d9cfe
ACM		 803 err = compat_nf_setsockopt(sk, PF_INET6, optname,
804 optval, optlen);
3fdadf7d
DM		 805 release_sock(sk);
806 }
807#endif
808 return err;
809}
543d9cfe
ACM		 810
811EXPORT_SYMBOL(compat_ipv6_setsockopt);
3fdadf7d
DM		 812#endif
813
28693079 814static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
4c6510a7 815 int optname, char __user *optval, int len)
333fad53 816{
28693079
DM		 817 struct ipv6_opt_hdr *hdr;
818
4c6510a7
YH		 819 if (!opt)
820 return 0;
821
822 switch(optname) {
823 case IPV6_HOPOPTS:
824 hdr = opt->hopopt;
825 break;
826 case IPV6_RTHDRDSTOPTS:
827 hdr = opt->dst0opt;
828 break;
829 case IPV6_RTHDR:
830 hdr = (struct ipv6_opt_hdr *)opt->srcrt;
831 break;
832 case IPV6_DSTOPTS:
833 hdr = opt->dst1opt;
834 break;
835 default:
836 return -EINVAL; /* should not happen */
837 }
838
839 if (!hdr)
333fad53 840 return 0;
28693079 841
d2b02ed9 842 len = min_t(unsigned int, len, ipv6_optlen(hdr));
660adc6e 843 if (copy_to_user(optval, hdr, len))
333fad53 844 return -EFAULT;
95b496b6 845 return len;
333fad53
YH		 846}
847
3fdadf7d 848static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
1da177e4
LT		 849 char __user *optval, int __user *optlen)
850{
851 struct ipv6_pinfo *np = inet6_sk(sk);
852 int len;
853 int val;
854
7bc570c8
YH		 855 if (ip6_mroute_opt(optname))
856 return ip6_mroute_getsockopt(sk, optname, optval, optlen);
857
1da177e4
LT		 858 if (get_user(len, optlen))
859 return -EFAULT;
860 switch (optname) {
861 case IPV6_ADDRFORM:
862 if (sk->sk_protocol != IPPROTO_UDP &&
ba4e58ec 863 sk->sk_protocol != IPPROTO_UDPLITE &&
1da177e4
LT		 864 sk->sk_protocol != IPPROTO_TCP)
865 return -EINVAL;
866 if (sk->sk_state != TCP_ESTABLISHED)
867 return -ENOTCONN;
868 val = sk->sk_family;
869 break;
870 case MCAST_MSFILTER:
871 {
872 struct group_filter gsf;
873 int err;
874
875 if (len < GROUP_FILTER_SIZE(0))
876 return -EINVAL;
877 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
878 return -EFAULT;
20c61fbd
YH		 879 if (gsf.gf_group.ss_family != AF_INET6)
880 return -EADDRNOTAVAIL;
1da177e4
LT		 881 lock_sock(sk);
882 err = ip6_mc_msfget(sk, &gsf,
883 (struct group_filter __user *)optval, optlen);
884 release_sock(sk);
885 return err;
886 }
887
333fad53 888 case IPV6_2292PKTOPTIONS:
1da177e4
LT		 889 {
890 struct msghdr msg;
891 struct sk_buff *skb;
892
893 if (sk->sk_type != SOCK_STREAM)
894 return -ENOPROTOOPT;
895
896 msg.msg_control = optval;
897 msg.msg_controllen = len;
898 msg.msg_flags = 0;
899
900 lock_sock(sk);
901 skb = np->pktoptions;
902 if (skb)
903 atomic_inc(&skb->users);
904 release_sock(sk);
905
906 if (skb) {
907 int err = datagram_recv_ctl(sk, &msg, skb);
908 kfree_skb(skb);
909 if (err)
910 return err;
911 } else {
912 if (np->rxopt.bits.rxinfo) {
913 struct in6_pktinfo src_info;
914 src_info.ipi6_ifindex = np->mcast_oif;
915 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
916 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
917 }
918 if (np->rxopt.bits.rxhlim) {
919 int hlim = np->mcast_hops;
920 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
921 }
333fad53
YH		 922 if (np->rxopt.bits.rxoinfo) {
923 struct in6_pktinfo src_info;
924 src_info.ipi6_ifindex = np->mcast_oif;
925 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
926 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
927 }
928 if (np->rxopt.bits.rxohlim) {
929 int hlim = np->mcast_hops;
930 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
931 }
1da177e4
LT		 932 }
933 len -= msg.msg_controllen;
934 return put_user(len, optlen);
935 }
936 case IPV6_MTU:
937 {
938 struct dst_entry *dst;
1ab1457c 939 val = 0;
1da177e4
LT		 940 lock_sock(sk);
941 dst = sk_dst_get(sk);
942 if (dst) {
943 val = dst_mtu(dst);
944 dst_release(dst);
945 }
946 release_sock(sk);
947 if (!val)
948 return -ENOTCONN;
949 break;
950 }
951
952 case IPV6_V6ONLY:
953 val = np->ipv6only;
954 break;
955
333fad53 956 case IPV6_RECVPKTINFO:
1da177e4
LT		 957 val = np->rxopt.bits.rxinfo;
958 break;
959
333fad53
YH		 960 case IPV6_2292PKTINFO:
961 val = np->rxopt.bits.rxoinfo;
962 break;
963
964 case IPV6_RECVHOPLIMIT:
1da177e4
LT		 965 val = np->rxopt.bits.rxhlim;
966 break;
967
333fad53
YH		 968 case IPV6_2292HOPLIMIT:
969 val = np->rxopt.bits.rxohlim;
970 break;
971
972 case IPV6_RECVRTHDR:
1da177e4
LT		 973 val = np->rxopt.bits.srcrt;
974 break;
975
333fad53
YH		 976 case IPV6_2292RTHDR:
977 val = np->rxopt.bits.osrcrt;
978 break;
979
1da177e4 980 case IPV6_HOPOPTS:
333fad53
YH		 981 case IPV6_RTHDRDSTOPTS:
982 case IPV6_RTHDR:
983 case IPV6_DSTOPTS:
984 {
985
986 lock_sock(sk);
28693079 987 len = ipv6_getsockopt_sticky(sk, np->opt,
4c6510a7 988 optname, optval, len);
333fad53 989 release_sock(sk);
05335c22
YH		 990 /* check if ipv6_getsockopt_sticky() returns err code */
991 if (len < 0)
992 return len;
333fad53
YH		 993 return put_user(len, optlen);
994 }
995
996 case IPV6_RECVHOPOPTS:
1da177e4
LT		 997 val = np->rxopt.bits.hopopts;
998 break;
999
333fad53
YH		 1000 case IPV6_2292HOPOPTS:
1001 val = np->rxopt.bits.ohopopts;
1002 break;
1003
1004 case IPV6_RECVDSTOPTS:
1da177e4
LT		 1005 val = np->rxopt.bits.dstopts;
1006 break;
1007
333fad53
YH		 1008 case IPV6_2292DSTOPTS:
1009 val = np->rxopt.bits.odstopts;
1010 break;
1011
41a1f8ea
YH		 1012 case IPV6_TCLASS:
1013 val = np->tclass;
d0ee011f
RDC		 1014 if (val < 0)
1015 val = 0;
41a1f8ea
YH		 1016 break;
1017
1018 case IPV6_RECVTCLASS:
1019 val = np->rxopt.bits.rxtclass;
1020 break;
1021
1da177e4
LT		 1022 case IPV6_FLOWINFO:
1023 val = np->rxopt.bits.rxflow;
1024 break;
1025
1026 case IPV6_UNICAST_HOPS:
1da177e4 1027 case IPV6_MULTICAST_HOPS:
befffe90
BH		 1028 {
1029 struct dst_entry *dst;
1030
1031 if (optname == IPV6_UNICAST_HOPS)
1032 val = np->hop_limit;
1033 else
1034 val = np->mcast_hops;
1035
1036 dst = sk_dst_get(sk);
1037 if (dst) {
1038 if (val < 0)
6b75d090 1039 val = ip6_dst_hoplimit(dst);
befffe90
BH		 1040 dst_release(dst);
1041 }
1042 if (val < 0)
1043 val = ipv6_devconf.hop_limit;
1da177e4 1044 break;
befffe90 1045 }
1da177e4
LT		 1046
1047 case IPV6_MULTICAST_LOOP:
1048 val = np->mc_loop;
1049 break;
1050
1051 case IPV6_MULTICAST_IF:
1052 val = np->mcast_oif;
1053 break;
1054
1055 case IPV6_MTU_DISCOVER:
1056 val = np->pmtudisc;
1057 break;
1058
1059 case IPV6_RECVERR:
1060 val = np->recverr;
1061 break;
1062
1063 case IPV6_FLOWINFO_SEND:
1064 val = np->sndflow;
1065 break;
1066
7cbca67c
YH		 1067 case IPV6_ADDR_PREFERENCES:
1068 val = 0;
1069
1070 if (np->srcprefs & IPV6_PREFER_SRC_TMP)
1071 val |= IPV6_PREFER_SRC_TMP;
1072 else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC)
1073 val |= IPV6_PREFER_SRC_PUBLIC;
1074 else {
1075 /* XXX: should we return system default? */
1076 val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT;
1077 }
1078
1079 if (np->srcprefs & IPV6_PREFER_SRC_COA)
1080 val |= IPV6_PREFER_SRC_COA;
1081 else
1082 val |= IPV6_PREFER_SRC_HOME;
1083 break;
1084
1da177e4 1085 default:
cf6fc4a9 1086 return -ENOPROTOOPT;
1da177e4
LT		 1087 }
1088 len = min_t(unsigned int, sizeof(int), len);
1089 if(put_user(len, optlen))
1090 return -EFAULT;
1091 if(copy_to_user(optval,&val,len))
1092 return -EFAULT;
1093 return 0;
1094}
1095
3fdadf7d
DM		 1096int ipv6_getsockopt(struct sock *sk, int level, int optname,
1097 char __user *optval, int __user *optlen)
1098{
1099 int err;
1100
1101 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
1102 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1103
1104 if(level != SOL_IPV6)
1105 return -ENOPROTOOPT;
1106
1107 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1108#ifdef CONFIG_NETFILTER
cf6fc4a9
WY		 1109 /* we need to exclude all possible ENOPROTOOPTs except default case */
1110 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
3fdadf7d
DM		 1111 int len;
1112
1113 if (get_user(len, optlen))
1114 return -EFAULT;
1115
1116 lock_sock(sk);
1117 err = nf_getsockopt(sk, PF_INET6, optname, optval,
1118 &len);
1119 release_sock(sk);
1120 if (err >= 0)
1121 err = put_user(len, optlen);
1122 }
1123#endif
1124 return err;
1125}
1126
7159039a
YH		 1127EXPORT_SYMBOL(ipv6_getsockopt);
1128
3fdadf7d
DM		 1129#ifdef CONFIG_COMPAT
1130int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
543d9cfe 1131 char __user *optval, int __user *optlen)
3fdadf7d
DM		 1132{
1133 int err;
1134
1135 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
543d9cfe
ACM		 1136 if (udp_prot.compat_getsockopt != NULL)
1137 return udp_prot.compat_getsockopt(sk, level, optname,
1138 optval, optlen);
1139 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
3fdadf7d
DM		 1140 }
1141
543d9cfe 1142 if (level != SOL_IPV6)
3fdadf7d
DM		 1143 return -ENOPROTOOPT;
1144
80991790
PE		 1145 if (optname == MCAST_MSFILTER)
1146 return compat_mc_getsockopt(sk, level, optname, optval, optlen,
1147 ipv6_getsockopt);
1148
3fdadf7d
DM		 1149 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1150#ifdef CONFIG_NETFILTER
cf6fc4a9
WY		 1151 /* we need to exclude all possible ENOPROTOOPTs except default case */
1152 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
3fdadf7d
DM		 1153 int len;
1154
1155 if (get_user(len, optlen))
1156 return -EFAULT;
1157
1158 lock_sock(sk);
543d9cfe
ACM		 1159 err = compat_nf_getsockopt(sk, PF_INET6,
1160 optname, optval, &len);
3fdadf7d
DM		 1161 release_sock(sk);
1162 if (err >= 0)
1163 err = put_user(len, optlen);
1164 }
1165#endif
1166 return err;
1167}
543d9cfe
ACM		 1168
1169EXPORT_SYMBOL(compat_ipv6_getsockopt);
3fdadf7d
DM		 1170#endif
1171
kernel source for telekom puls (alcatel/mediatek)