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[NETNS]: Introduce a netns_core structure.
[net-next-2.6.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 *
19 * o Return -EINVAL for setsockopt of short lengths
20 * o Truncate getsockopt returns
21 * o Return an optlen of the truncated length if need be
22 *
23 * Changes:
24 * David L Stevens <dlstevens@us.ibm.com>:
25 * - added multicast source filtering API for MLDv2
26 */
27
28#include <linux/module.h>
4fc268d2 29#include <linux/capability.h>
1da177e4
LT		 30#include <linux/errno.h>
31#include <linux/types.h>
32#include <linux/socket.h>
33#include <linux/sockios.h>
1da177e4
LT		 34#include <linux/net.h>
35#include <linux/in6.h>
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
LT		 54#include <net/xfrm.h>
55
56#include <asm/uaccess.h>
57
ba89966c 58DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly;
1da177e4 59
1da177e4
LT		 60struct ip6_ra_chain *ip6_ra_chain;
61DEFINE_RWLOCK(ip6_ra_lock);
62
63int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *))
64{
65 struct ip6_ra_chain *ra, *new_ra, **rap;
66
67 /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
68 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW)
69 return -EINVAL;
70
71 new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
72
73 write_lock_bh(&ip6_ra_lock);
74 for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
75 if (ra->sk == sk) {
76 if (sel>=0) {
77 write_unlock_bh(&ip6_ra_lock);
a51482bd 78 kfree(new_ra);
1da177e4
LT		 79 return -EADDRINUSE;
80 }
81
82 *rap = ra->next;
83 write_unlock_bh(&ip6_ra_lock);
84
85 if (ra->destructor)
86 ra->destructor(sk);
87 sock_put(sk);
88 kfree(ra);
89 return 0;
90 }
91 }
92 if (new_ra == NULL) {
93 write_unlock_bh(&ip6_ra_lock);
94 return -ENOBUFS;
95 }
96 new_ra->sk = sk;
97 new_ra->sel = sel;
98 new_ra->destructor = destructor;
99 new_ra->next = ra;
100 *rap = new_ra;
101 sock_hold(sk);
102 write_unlock_bh(&ip6_ra_lock);
103 return 0;
104}
105
3fdadf7d 106static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
1da177e4
LT		 107 char __user *optval, int optlen)
108{
109 struct ipv6_pinfo *np = inet6_sk(sk);
3b1e0a65 110 struct net *net = sock_net(sk);
1da177e4
LT		 111 int val, valbool;
112 int retv = -ENOPROTOOPT;
113
1da177e4
LT		 114 if (optval == NULL)
115 val=0;
116 else if (get_user(val, (int __user *) optval))
117 return -EFAULT;
118
119 valbool = (val!=0);
120
121 lock_sock(sk);
122
123 switch (optname) {
124
125 case IPV6_ADDRFORM:
126 if (val == PF_INET) {
127 struct ipv6_txoptions *opt;
128 struct sk_buff *pktopt;
129
130 if (sk->sk_protocol != IPPROTO_UDP &&
ba4e58ec 131 sk->sk_protocol != IPPROTO_UDPLITE &&
1da177e4
LT		 132 sk->sk_protocol != IPPROTO_TCP)
133 break;
134
135 if (sk->sk_state != TCP_ESTABLISHED) {
136 retv = -ENOTCONN;
137 break;
138 }
139
140 if (ipv6_only_sock(sk) ||
e773e4fa 141 !ipv6_addr_v4mapped(&np->daddr)) {
1da177e4
LT		 142 retv = -EADDRNOTAVAIL;
143 break;
144 }
145
146 fl6_free_socklist(sk);
147 ipv6_sock_mc_close(sk);
148
e6848976
ACM		 149 /*
150 * Sock is moving from IPv6 to IPv4 (sk_prot), so
151 * remove it from the refcnt debug socks count in the
152 * original family...
153 */
154 sk_refcnt_debug_dec(sk);
155
1da177e4 156 if (sk->sk_protocol == IPPROTO_TCP) {
d83d8461 157 struct inet_connection_sock *icsk = inet_csk(sk);
1da177e4
LT		 158
159 local_bh_disable();
65f76517
ED		 160 sock_prot_inuse_add(sk->sk_prot, -1);
161 sock_prot_inuse_add(&tcp_prot, 1);
1da177e4
LT		 162 local_bh_enable();
163 sk->sk_prot = &tcp_prot;
d83d8461 164 icsk->icsk_af_ops = &ipv4_specific;
1da177e4
LT		 165 sk->sk_socket->ops = &inet_stream_ops;
166 sk->sk_family = PF_INET;
d83d8461 167 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
1da177e4 168 } else {
ba4e58ec
GR		 169 struct proto *prot = &udp_prot;
170
db8dac20 171 if (sk->sk_protocol == IPPROTO_UDPLITE)
ba4e58ec 172 prot = &udplite_prot;
1da177e4 173 local_bh_disable();
65f76517
ED		 174 sock_prot_inuse_add(sk->sk_prot, -1);
175 sock_prot_inuse_add(prot, 1);
1da177e4 176 local_bh_enable();
ba4e58ec 177 sk->sk_prot = prot;
1da177e4
LT		 178 sk->sk_socket->ops = &inet_dgram_ops;
179 sk->sk_family = PF_INET;
180 }
181 opt = xchg(&np->opt, NULL);
182 if (opt)
183 sock_kfree_s(sk, opt, opt->tot_len);
184 pktopt = xchg(&np->pktoptions, NULL);
185 if (pktopt)
186 kfree_skb(pktopt);
187
188 sk->sk_destruct = inet_sock_destruct;
e6848976
ACM		 189 /*
190 * ... and add it to the refcnt debug socks count
191 * in the new family. -acme
192 */
193 sk_refcnt_debug_inc(sk);
1da177e4
LT		 194 module_put(THIS_MODULE);
195 retv = 0;
196 break;
197 }
198 goto e_inval;
199
200 case IPV6_V6ONLY:
201 if (inet_sk(sk)->num)
202 goto e_inval;
203 np->ipv6only = valbool;
204 retv = 0;
205 break;
206
333fad53 207 case IPV6_RECVPKTINFO:
1da177e4
LT		 208 np->rxopt.bits.rxinfo = valbool;
209 retv = 0;
210 break;
1ab1457c 211
333fad53
YH		 212 case IPV6_2292PKTINFO:
213 np->rxopt.bits.rxoinfo = valbool;
214 retv = 0;
215 break;
1da177e4 216
333fad53 217 case IPV6_RECVHOPLIMIT:
1da177e4
LT		 218 np->rxopt.bits.rxhlim = valbool;
219 retv = 0;
220 break;
221
333fad53
YH		 222 case IPV6_2292HOPLIMIT:
223 np->rxopt.bits.rxohlim = valbool;
224 retv = 0;
225 break;
226
227 case IPV6_RECVRTHDR:
4c752098 228 np->rxopt.bits.srcrt = valbool;
1da177e4
LT		 229 retv = 0;
230 break;
231
333fad53 232 case IPV6_2292RTHDR:
4c752098 233 np->rxopt.bits.osrcrt = valbool;
333fad53
YH		 234 retv = 0;
235 break;
236
237 case IPV6_RECVHOPOPTS:
1da177e4
LT		 238 np->rxopt.bits.hopopts = valbool;
239 retv = 0;
240 break;
241
333fad53
YH		 242 case IPV6_2292HOPOPTS:
243 np->rxopt.bits.ohopopts = valbool;
244 retv = 0;
245 break;
246
247 case IPV6_RECVDSTOPTS:
1da177e4
LT		 248 np->rxopt.bits.dstopts = valbool;
249 retv = 0;
250 break;
251
333fad53
YH		 252 case IPV6_2292DSTOPTS:
253 np->rxopt.bits.odstopts = valbool;
254 retv = 0;
255 break;
256
41a1f8ea 257 case IPV6_TCLASS:
d0ee011f 258 if (val < -1 || val > 0xff)
41a1f8ea
YH		 259 goto e_inval;
260 np->tclass = val;
261 retv = 0;
262 break;
1ab1457c 263
41a1f8ea
YH		 264 case IPV6_RECVTCLASS:
265 np->rxopt.bits.rxtclass = valbool;
266 retv = 0;
267 break;
268
1da177e4
LT		 269 case IPV6_FLOWINFO:
270 np->rxopt.bits.rxflow = valbool;
271 retv = 0;
272 break;
273
333fad53
YH		 274 case IPV6_HOPOPTS:
275 case IPV6_RTHDRDSTOPTS:
276 case IPV6_RTHDR:
277 case IPV6_DSTOPTS:
278 {
279 struct ipv6_txoptions *opt;
280 if (optlen == 0)
cb422c46 281 optval = NULL;
333fad53
YH		 282
283 /* hop-by-hop / destination options are privileged option */
284 retv = -EPERM;
285 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
286 break;
287
288 retv = -EINVAL;
289 if (optlen & 0x7 || optlen > 8 * 255)
290 break;
291
292 opt = ipv6_renew_options(sk, np->opt, optname,
293 (struct ipv6_opt_hdr __user *)optval,
294 optlen);
295 if (IS_ERR(opt)) {
296 retv = PTR_ERR(opt);
297 break;
298 }
299
300 /* routing header option needs extra check */
dfee0a72 301 if (optname == IPV6_RTHDR && opt && opt->srcrt) {
333fad53 302 struct ipv6_rt_hdr *rthdr = opt->srcrt;
280a9d34 303 switch (rthdr->type) {
59fbb3a6 304#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
280a9d34 305 case IPV6_SRCRT_TYPE_2:
280a9d34 306 break;
bb4dbf9e 307#endif
280a9d34 308 default:
333fad53 309 goto sticky_done;
280a9d34
MN		 310 }
311
333fad53
YH		 312 if ((rthdr->hdrlen & 1) ||
313 (rthdr->hdrlen >> 1) != rthdr->segments_left)
314 goto sticky_done;
315 }
316
317 retv = 0;
d83d8461 318 if (inet_sk(sk)->is_icsk) {
333fad53 319 if (opt) {
d83d8461 320 struct inet_connection_sock *icsk = inet_csk(sk);
333fad53
YH		 321 if (!((1 << sk->sk_state) &
322 (TCPF_LISTEN | TCPF_CLOSE))
323 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
d83d8461
ACM		 324 icsk->icsk_ext_hdr_len =
325 opt->opt_flen + opt->opt_nflen;
326 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
333fad53
YH		 327 }
328 }
329 opt = xchg(&np->opt, opt);
330 sk_dst_reset(sk);
331 } else {
332 write_lock(&sk->sk_dst_lock);
333 opt = xchg(&np->opt, opt);
334 write_unlock(&sk->sk_dst_lock);
335 sk_dst_reset(sk);
336 }
337sticky_done:
338 if (opt)
339 sock_kfree_s(sk, opt, opt->tot_len);
340 break;
341 }
342
343 case IPV6_2292PKTOPTIONS:
1da177e4
LT		 344 {
345 struct ipv6_txoptions *opt = NULL;
346 struct msghdr msg;
347 struct flowi fl;
348 int junk;
349
350 fl.fl6_flowlabel = 0;
351 fl.oif = sk->sk_bound_dev_if;
352
353 if (optlen == 0)
354 goto update;
355
356 /* 1K is probably excessive
357 * 1K is surely not enough, 2K per standard header is 16K.
358 */
359 retv = -EINVAL;
360 if (optlen > 64*1024)
361 break;
362
363 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
364 retv = -ENOBUFS;
365 if (opt == NULL)
366 break;
367
368 memset(opt, 0, sizeof(*opt));
369 opt->tot_len = sizeof(*opt) + optlen;
370 retv = -EFAULT;
371 if (copy_from_user(opt+1, optval, optlen))
372 goto done;
373
374 msg.msg_controllen = optlen;
375 msg.msg_control = (void*)(opt+1);
376
41a1f8ea 377 retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk);
1da177e4
LT		 378 if (retv)
379 goto done;
380update:
381 retv = 0;
d83d8461 382 if (inet_sk(sk)->is_icsk) {
1da177e4 383 if (opt) {
d83d8461 384 struct inet_connection_sock *icsk = inet_csk(sk);
1da177e4
LT		 385 if (!((1 << sk->sk_state) &
386 (TCPF_LISTEN | TCPF_CLOSE))
387 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
d83d8461
ACM		 388 icsk->icsk_ext_hdr_len =
389 opt->opt_flen + opt->opt_nflen;
390 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
1da177e4
LT		 391 }
392 }
393 opt = xchg(&np->opt, opt);
394 sk_dst_reset(sk);
395 } else {
396 write_lock(&sk->sk_dst_lock);
397 opt = xchg(&np->opt, opt);
398 write_unlock(&sk->sk_dst_lock);
399 sk_dst_reset(sk);
400 }
401
402done:
403 if (opt)
404 sock_kfree_s(sk, opt, opt->tot_len);
405 break;
406 }
407 case IPV6_UNICAST_HOPS:
408 if (val > 255 || val < -1)
409 goto e_inval;
410 np->hop_limit = val;
411 retv = 0;
412 break;
413
414 case IPV6_MULTICAST_HOPS:
415 if (sk->sk_type == SOCK_STREAM)
416 goto e_inval;
417 if (val > 255 || val < -1)
418 goto e_inval;
419 np->mcast_hops = val;
420 retv = 0;
421 break;
422
423 case IPV6_MULTICAST_LOOP:
424 np->mc_loop = valbool;
425 retv = 0;
426 break;
427
428 case IPV6_MULTICAST_IF:
429 if (sk->sk_type == SOCK_STREAM)
430 goto e_inval;
1da177e4 431
4953f0fc
BH		 432 if (val) {
433 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
434 goto e_inval;
435
8a3edd80 436 if (__dev_get_by_index(net, val) == NULL) {
4953f0fc
BH		 437 retv = -ENODEV;
438 break;
439 }
1da177e4
LT		 440 }
441 np->mcast_oif = val;
442 retv = 0;
443 break;
444 case IPV6_ADD_MEMBERSHIP:
445 case IPV6_DROP_MEMBERSHIP:
446 {
447 struct ipv6_mreq mreq;
448
a96fb49b
FL		 449 retv = -EPROTO;
450 if (inet_sk(sk)->is_icsk)
451 break;
452
1da177e4
LT		 453 retv = -EFAULT;
454 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
455 break;
456
457 if (optname == IPV6_ADD_MEMBERSHIP)
458 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
459 else
460 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
461 break;
462 }
463 case IPV6_JOIN_ANYCAST:
464 case IPV6_LEAVE_ANYCAST:
465 {
466 struct ipv6_mreq mreq;
467
468 if (optlen != sizeof(struct ipv6_mreq))
469 goto e_inval;
470
471 retv = -EFAULT;
472 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
473 break;
474
475 if (optname == IPV6_JOIN_ANYCAST)
476 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
477 else
478 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
479 break;
480 }
481 case MCAST_JOIN_GROUP:
482 case MCAST_LEAVE_GROUP:
483 {
484 struct group_req greq;
485 struct sockaddr_in6 *psin6;
486
487 retv = -EFAULT;
488 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
489 break;
490 if (greq.gr_group.ss_family != AF_INET6) {
491 retv = -EADDRNOTAVAIL;
492 break;
493 }
494 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
495 if (optname == MCAST_JOIN_GROUP)
496 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
497 &psin6->sin6_addr);
498 else
499 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
500 &psin6->sin6_addr);
501 break;
502 }
503 case MCAST_JOIN_SOURCE_GROUP:
504 case MCAST_LEAVE_SOURCE_GROUP:
505 case MCAST_BLOCK_SOURCE:
506 case MCAST_UNBLOCK_SOURCE:
507 {
508 struct group_source_req greqs;
509 int omode, add;
510
511 if (optlen != sizeof(struct group_source_req))
512 goto e_inval;
513 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
514 retv = -EFAULT;
515 break;
516 }
517 if (greqs.gsr_group.ss_family != AF_INET6 ||
518 greqs.gsr_source.ss_family != AF_INET6) {
519 retv = -EADDRNOTAVAIL;
520 break;
521 }
522 if (optname == MCAST_BLOCK_SOURCE) {
523 omode = MCAST_EXCLUDE;
524 add = 1;
525 } else if (optname == MCAST_UNBLOCK_SOURCE) {
526 omode = MCAST_EXCLUDE;
527 add = 0;
528 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
529 struct sockaddr_in6 *psin6;
530
531 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
532 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
533 &psin6->sin6_addr);
c9e3e8b6
DS		 534 /* prior join w/ different source is ok */
535 if (retv && retv != -EADDRINUSE)
1da177e4
LT		 536 break;
537 omode = MCAST_INCLUDE;
538 add = 1;
c9e3e8b6 539 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
1da177e4
LT		 540 omode = MCAST_INCLUDE;
541 add = 0;
542 }
543 retv = ip6_mc_source(add, omode, sk, &greqs);
544 break;
545 }
546 case MCAST_MSFILTER:
547 {
1da177e4
LT		 548 extern int sysctl_mld_max_msf;
549 struct group_filter *gsf;
550
551 if (optlen < GROUP_FILTER_SIZE(0))
552 goto e_inval;
553 if (optlen > sysctl_optmem_max) {
554 retv = -ENOBUFS;
555 break;
556 }
8b3a7005 557 gsf = kmalloc(optlen,GFP_KERNEL);
cfcabdcc 558 if (!gsf) {
1da177e4
LT		 559 retv = -ENOBUFS;
560 break;
561 }
562 retv = -EFAULT;
563 if (copy_from_user(gsf, optval, optlen)) {
564 kfree(gsf);
565 break;
566 }
567 /* numsrc >= (4G-140)/128 overflow in 32 bits */
568 if (gsf->gf_numsrc >= 0x1ffffffU ||
569 gsf->gf_numsrc > sysctl_mld_max_msf) {
570 kfree(gsf);
571 retv = -ENOBUFS;
572 break;
573 }
574 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
575 kfree(gsf);
576 retv = -EINVAL;
577 break;
578 }
579 retv = ip6_mc_msfilter(sk, gsf);
580 kfree(gsf);
581
582 break;
583 }
584 case IPV6_ROUTER_ALERT:
585 retv = ip6_ra_control(sk, val, NULL);
586 break;
587 case IPV6_MTU_DISCOVER:
628a5c56 588 if (val<0 || val>3)
1da177e4
LT		 589 goto e_inval;
590 np->pmtudisc = val;
591 retv = 0;
592 break;
593 case IPV6_MTU:
594 if (val && val < IPV6_MIN_MTU)
595 goto e_inval;
596 np->frag_size = val;
597 retv = 0;
598 break;
599 case IPV6_RECVERR:
600 np->recverr = valbool;
601 if (!val)
602 skb_queue_purge(&sk->sk_error_queue);
603 retv = 0;
604 break;
605 case IPV6_FLOWINFO_SEND:
606 np->sndflow = valbool;
607 retv = 0;
608 break;
609 case IPV6_FLOWLABEL_MGR:
610 retv = ipv6_flowlabel_opt(sk, optval, optlen);
611 break;
612 case IPV6_IPSEC_POLICY:
613 case IPV6_XFRM_POLICY:
6fc0b4a7
HX		 614 retv = -EPERM;
615 if (!capable(CAP_NET_ADMIN))
616 break;
1da177e4
LT		 617 retv = xfrm_user_policy(sk, optname, optval, optlen);
618 break;
619
7cbca67c
YH		 620 case IPV6_ADDR_PREFERENCES:
621 {
622 unsigned int pref = 0;
623 unsigned int prefmask = ~0;
624
625 retv = -EINVAL;
626
627 /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */
628 switch (val & (IPV6_PREFER_SRC_PUBLIC|
629 IPV6_PREFER_SRC_TMP|
630 IPV6_PREFER_SRC_PUBTMP_DEFAULT)) {
631 case IPV6_PREFER_SRC_PUBLIC:
632 pref |= IPV6_PREFER_SRC_PUBLIC;
633 break;
634 case IPV6_PREFER_SRC_TMP:
635 pref |= IPV6_PREFER_SRC_TMP;
636 break;
637 case IPV6_PREFER_SRC_PUBTMP_DEFAULT:
638 break;
639 case 0:
640 goto pref_skip_pubtmp;
641 default:
642 goto e_inval;
643 }
644
645 prefmask &= ~(IPV6_PREFER_SRC_PUBLIC|
646 IPV6_PREFER_SRC_TMP);
647pref_skip_pubtmp:
648
649 /* check HOME/COA conflicts */
650 switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) {
651 case IPV6_PREFER_SRC_HOME:
652 break;
653 case IPV6_PREFER_SRC_COA:
654 pref |= IPV6_PREFER_SRC_COA;
655 case 0:
656 goto pref_skip_coa;
657 default:
658 goto e_inval;
659 }
660
661 prefmask &= ~IPV6_PREFER_SRC_COA;
662pref_skip_coa:
663
664 /* check CGA/NONCGA conflicts */
665 switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) {
666 case IPV6_PREFER_SRC_CGA:
667 case IPV6_PREFER_SRC_NONCGA:
668 case 0:
669 break;
670 default:
671 goto e_inval;
672 }
673
674 np->srcprefs = (np->srcprefs & prefmask) | pref;
675 retv = 0;
676
677 break;
678 }
1da177e4 679 }
7cbca67c 680
1da177e4
LT		 681 release_sock(sk);
682
1da177e4
LT		 683 return retv;
684
685e_inval:
686 release_sock(sk);
687 return -EINVAL;
688}
689
3fdadf7d
DM		 690int ipv6_setsockopt(struct sock *sk, int level, int optname,
691 char __user *optval, int optlen)
692{
693 int err;
694
695 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
696 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
697
698 if (level != SOL_IPV6)
699 return -ENOPROTOOPT;
700
701 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
702#ifdef CONFIG_NETFILTER
703 /* we need to exclude all possible ENOPROTOOPTs except default case */
704 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
705 optname != IPV6_XFRM_POLICY) {
706 lock_sock(sk);
707 err = nf_setsockopt(sk, PF_INET6, optname, optval,
708 optlen);
709 release_sock(sk);
710 }
711#endif
712 return err;
713}
714
7159039a 715EXPORT_SYMBOL(ipv6_setsockopt);
3fdadf7d
DM		 716
717#ifdef CONFIG_COMPAT
718int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
543d9cfe 719 char __user *optval, int optlen)
3fdadf7d
DM		 720{
721 int err;
722
723 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
543d9cfe
ACM		 724 if (udp_prot.compat_setsockopt != NULL)
725 return udp_prot.compat_setsockopt(sk, level, optname,
726 optval, optlen);
727 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
3fdadf7d
DM		 728 }
729
730 if (level != SOL_IPV6)
731 return -ENOPROTOOPT;
732
733 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
734#ifdef CONFIG_NETFILTER
735 /* we need to exclude all possible ENOPROTOOPTs except default case */
736 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
543d9cfe 737 optname != IPV6_XFRM_POLICY) {
3fdadf7d 738 lock_sock(sk);
543d9cfe
ACM		 739 err = compat_nf_setsockopt(sk, PF_INET6, optname,
740 optval, optlen);
3fdadf7d
DM		 741 release_sock(sk);
742 }
743#endif
744 return err;
745}
543d9cfe
ACM		 746
747EXPORT_SYMBOL(compat_ipv6_setsockopt);
3fdadf7d
DM		 748#endif
749
28693079 750static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
4c6510a7 751 int optname, char __user *optval, int len)
333fad53 752{
28693079
DM		 753 struct ipv6_opt_hdr *hdr;
754
4c6510a7
YH		 755 if (!opt)
756 return 0;
757
758 switch(optname) {
759 case IPV6_HOPOPTS:
760 hdr = opt->hopopt;
761 break;
762 case IPV6_RTHDRDSTOPTS:
763 hdr = opt->dst0opt;
764 break;
765 case IPV6_RTHDR:
766 hdr = (struct ipv6_opt_hdr *)opt->srcrt;
767 break;
768 case IPV6_DSTOPTS:
769 hdr = opt->dst1opt;
770 break;
771 default:
772 return -EINVAL; /* should not happen */
773 }
774
775 if (!hdr)
333fad53 776 return 0;
28693079 777
d2b02ed9 778 len = min_t(unsigned int, len, ipv6_optlen(hdr));
660adc6e 779 if (copy_to_user(optval, hdr, len))
333fad53 780 return -EFAULT;
e5268f12 781 return ipv6_optlen(hdr);
333fad53
YH		 782}
783
3fdadf7d 784static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
1da177e4
LT		 785 char __user *optval, int __user *optlen)
786{
787 struct ipv6_pinfo *np = inet6_sk(sk);
788 int len;
789 int val;
790
1da177e4
LT		 791 if (get_user(len, optlen))
792 return -EFAULT;
793 switch (optname) {
794 case IPV6_ADDRFORM:
795 if (sk->sk_protocol != IPPROTO_UDP &&
ba4e58ec 796 sk->sk_protocol != IPPROTO_UDPLITE &&
1da177e4
LT		 797 sk->sk_protocol != IPPROTO_TCP)
798 return -EINVAL;
799 if (sk->sk_state != TCP_ESTABLISHED)
800 return -ENOTCONN;
801 val = sk->sk_family;
802 break;
803 case MCAST_MSFILTER:
804 {
805 struct group_filter gsf;
806 int err;
807
808 if (len < GROUP_FILTER_SIZE(0))
809 return -EINVAL;
810 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
811 return -EFAULT;
812 lock_sock(sk);
813 err = ip6_mc_msfget(sk, &gsf,
814 (struct group_filter __user *)optval, optlen);
815 release_sock(sk);
816 return err;
817 }
818
333fad53 819 case IPV6_2292PKTOPTIONS:
1da177e4
LT		 820 {
821 struct msghdr msg;
822 struct sk_buff *skb;
823
824 if (sk->sk_type != SOCK_STREAM)
825 return -ENOPROTOOPT;
826
827 msg.msg_control = optval;
828 msg.msg_controllen = len;
829 msg.msg_flags = 0;
830
831 lock_sock(sk);
832 skb = np->pktoptions;
833 if (skb)
834 atomic_inc(&skb->users);
835 release_sock(sk);
836
837 if (skb) {
838 int err = datagram_recv_ctl(sk, &msg, skb);
839 kfree_skb(skb);
840 if (err)
841 return err;
842 } else {
843 if (np->rxopt.bits.rxinfo) {
844 struct in6_pktinfo src_info;
845 src_info.ipi6_ifindex = np->mcast_oif;
846 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
847 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
848 }
849 if (np->rxopt.bits.rxhlim) {
850 int hlim = np->mcast_hops;
851 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
852 }
333fad53
YH		 853 if (np->rxopt.bits.rxoinfo) {
854 struct in6_pktinfo src_info;
855 src_info.ipi6_ifindex = np->mcast_oif;
856 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
857 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
858 }
859 if (np->rxopt.bits.rxohlim) {
860 int hlim = np->mcast_hops;
861 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
862 }
1da177e4
LT		 863 }
864 len -= msg.msg_controllen;
865 return put_user(len, optlen);
866 }
867 case IPV6_MTU:
868 {
869 struct dst_entry *dst;
1ab1457c 870 val = 0;
1da177e4
LT		 871 lock_sock(sk);
872 dst = sk_dst_get(sk);
873 if (dst) {
874 val = dst_mtu(dst);
875 dst_release(dst);
876 }
877 release_sock(sk);
878 if (!val)
879 return -ENOTCONN;
880 break;
881 }
882
883 case IPV6_V6ONLY:
884 val = np->ipv6only;
885 break;
886
333fad53 887 case IPV6_RECVPKTINFO:
1da177e4
LT		 888 val = np->rxopt.bits.rxinfo;
889 break;
890
333fad53
YH		 891 case IPV6_2292PKTINFO:
892 val = np->rxopt.bits.rxoinfo;
893 break;
894
895 case IPV6_RECVHOPLIMIT:
1da177e4
LT		 896 val = np->rxopt.bits.rxhlim;
897 break;
898
333fad53
YH		 899 case IPV6_2292HOPLIMIT:
900 val = np->rxopt.bits.rxohlim;
901 break;
902
903 case IPV6_RECVRTHDR:
1da177e4
LT		 904 val = np->rxopt.bits.srcrt;
905 break;
906
333fad53
YH		 907 case IPV6_2292RTHDR:
908 val = np->rxopt.bits.osrcrt;
909 break;
910
1da177e4 911 case IPV6_HOPOPTS:
333fad53
YH		 912 case IPV6_RTHDRDSTOPTS:
913 case IPV6_RTHDR:
914 case IPV6_DSTOPTS:
915 {
916
917 lock_sock(sk);
28693079 918 len = ipv6_getsockopt_sticky(sk, np->opt,
4c6510a7 919 optname, optval, len);
333fad53
YH		 920 release_sock(sk);
921 return put_user(len, optlen);
922 }
923
924 case IPV6_RECVHOPOPTS:
1da177e4
LT		 925 val = np->rxopt.bits.hopopts;
926 break;
927
333fad53
YH		 928 case IPV6_2292HOPOPTS:
929 val = np->rxopt.bits.ohopopts;
930 break;
931
932 case IPV6_RECVDSTOPTS:
1da177e4
LT		 933 val = np->rxopt.bits.dstopts;
934 break;
935
333fad53
YH		 936 case IPV6_2292DSTOPTS:
937 val = np->rxopt.bits.odstopts;
938 break;
939
41a1f8ea
YH		 940 case IPV6_TCLASS:
941 val = np->tclass;
d0ee011f
RDC		 942 if (val < 0)
943 val = 0;
41a1f8ea
YH		 944 break;
945
946 case IPV6_RECVTCLASS:
947 val = np->rxopt.bits.rxtclass;
948 break;
949
1da177e4
LT		 950 case IPV6_FLOWINFO:
951 val = np->rxopt.bits.rxflow;
952 break;
953
954 case IPV6_UNICAST_HOPS:
1da177e4 955 case IPV6_MULTICAST_HOPS:
befffe90
BH		 956 {
957 struct dst_entry *dst;
958
959 if (optname == IPV6_UNICAST_HOPS)
960 val = np->hop_limit;
961 else
962 val = np->mcast_hops;
963
964 dst = sk_dst_get(sk);
965 if (dst) {
966 if (val < 0)
6b75d090 967 val = ip6_dst_hoplimit(dst);
befffe90
BH		 968 dst_release(dst);
969 }
970 if (val < 0)
971 val = ipv6_devconf.hop_limit;
1da177e4 972 break;
befffe90 973 }
1da177e4
LT		 974
975 case IPV6_MULTICAST_LOOP:
976 val = np->mc_loop;
977 break;
978
979 case IPV6_MULTICAST_IF:
980 val = np->mcast_oif;
981 break;
982
983 case IPV6_MTU_DISCOVER:
984 val = np->pmtudisc;
985 break;
986
987 case IPV6_RECVERR:
988 val = np->recverr;
989 break;
990
991 case IPV6_FLOWINFO_SEND:
992 val = np->sndflow;
993 break;
994
7cbca67c
YH		 995 case IPV6_ADDR_PREFERENCES:
996 val = 0;
997
998 if (np->srcprefs & IPV6_PREFER_SRC_TMP)
999 val |= IPV6_PREFER_SRC_TMP;
1000 else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC)
1001 val |= IPV6_PREFER_SRC_PUBLIC;
1002 else {
1003 /* XXX: should we return system default? */
1004 val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT;
1005 }
1006
1007 if (np->srcprefs & IPV6_PREFER_SRC_COA)
1008 val |= IPV6_PREFER_SRC_COA;
1009 else
1010 val |= IPV6_PREFER_SRC_HOME;
1011 break;
1012
1da177e4 1013 default:
cf6fc4a9 1014 return -ENOPROTOOPT;
1da177e4
LT		 1015 }
1016 len = min_t(unsigned int, sizeof(int), len);
1017 if(put_user(len, optlen))
1018 return -EFAULT;
1019 if(copy_to_user(optval,&val,len))
1020 return -EFAULT;
1021 return 0;
1022}
1023
3fdadf7d
DM		 1024int ipv6_getsockopt(struct sock *sk, int level, int optname,
1025 char __user *optval, int __user *optlen)
1026{
1027 int err;
1028
1029 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
1030 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1031
1032 if(level != SOL_IPV6)
1033 return -ENOPROTOOPT;
1034
1035 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1036#ifdef CONFIG_NETFILTER
cf6fc4a9
WY		 1037 /* we need to exclude all possible ENOPROTOOPTs except default case */
1038 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
3fdadf7d
DM		 1039 int len;
1040
1041 if (get_user(len, optlen))
1042 return -EFAULT;
1043
1044 lock_sock(sk);
1045 err = nf_getsockopt(sk, PF_INET6, optname, optval,
1046 &len);
1047 release_sock(sk);
1048 if (err >= 0)
1049 err = put_user(len, optlen);
1050 }
1051#endif
1052 return err;
1053}
1054
7159039a
YH		 1055EXPORT_SYMBOL(ipv6_getsockopt);
1056
3fdadf7d
DM		 1057#ifdef CONFIG_COMPAT
1058int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
543d9cfe 1059 char __user *optval, int __user *optlen)
3fdadf7d
DM		 1060{
1061 int err;
1062
1063 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
543d9cfe
ACM		 1064 if (udp_prot.compat_getsockopt != NULL)
1065 return udp_prot.compat_getsockopt(sk, level, optname,
1066 optval, optlen);
1067 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
3fdadf7d
DM		 1068 }
1069
543d9cfe 1070 if (level != SOL_IPV6)
3fdadf7d
DM		 1071 return -ENOPROTOOPT;
1072
1073 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1074#ifdef CONFIG_NETFILTER
cf6fc4a9
WY		 1075 /* we need to exclude all possible ENOPROTOOPTs except default case */
1076 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
3fdadf7d
DM		 1077 int len;
1078
1079 if (get_user(len, optlen))
1080 return -EFAULT;
1081
1082 lock_sock(sk);
543d9cfe
ACM		 1083 err = compat_nf_getsockopt(sk, PF_INET6,
1084 optname, optval, &len);
3fdadf7d
DM		 1085 release_sock(sk);
1086 if (err >= 0)
1087 err = put_user(len, optlen);
1088 }
1089#endif
1090 return err;
1091}
543d9cfe
ACM		 1092
1093EXPORT_SYMBOL(compat_ipv6_getsockopt);
3fdadf7d
DM		 1094#endif
1095
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