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[IPV6] MIP6: Use our standard definitions for paddings.
[deliverable/linux.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>
7bc570c8 36#include <linux/mroute6.h>
1da177e4
LT		 37#include <linux/netdevice.h>
38#include <linux/if_arp.h>
39#include <linux/init.h>
40#include <linux/sysctl.h>
41#include <linux/netfilter.h>
42
43#include <net/sock.h>
44#include <net/snmp.h>
45#include <net/ipv6.h>
46#include <net/ndisc.h>
47#include <net/protocol.h>
48#include <net/transp_v6.h>
49#include <net/ip6_route.h>
50#include <net/addrconf.h>
51#include <net/inet_common.h>
52#include <net/tcp.h>
53#include <net/udp.h>
ba4e58ec 54#include <net/udplite.h>
1da177e4
LT		 55#include <net/xfrm.h>
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
3fdadf7d 107static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
1da177e4
LT		 108 char __user *optval, int optlen)
109{
110 struct ipv6_pinfo *np = inet6_sk(sk);
3b1e0a65 111 struct net *net = sock_net(sk);
1da177e4
LT		 112 int val, valbool;
113 int retv = -ENOPROTOOPT;
114
1da177e4
LT		 115 if (optval == NULL)
116 val=0;
117 else if (get_user(val, (int __user *) optval))
118 return -EFAULT;
119
120 valbool = (val!=0);
121
7bc570c8
YH		 122 if (ip6_mroute_opt(optname))
123 return ip6_mroute_setsockopt(sk, optname, optval, optlen);
124
1da177e4
LT		 125 lock_sock(sk);
126
127 switch (optname) {
128
129 case IPV6_ADDRFORM:
130 if (val == PF_INET) {
131 struct ipv6_txoptions *opt;
132 struct sk_buff *pktopt;
133
134 if (sk->sk_protocol != IPPROTO_UDP &&
ba4e58ec 135 sk->sk_protocol != IPPROTO_UDPLITE &&
1da177e4
LT		 136 sk->sk_protocol != IPPROTO_TCP)
137 break;
138
139 if (sk->sk_state != TCP_ESTABLISHED) {
140 retv = -ENOTCONN;
141 break;
142 }
143
144 if (ipv6_only_sock(sk) ||
e773e4fa 145 !ipv6_addr_v4mapped(&np->daddr)) {
1da177e4
LT		 146 retv = -EADDRNOTAVAIL;
147 break;
148 }
149
150 fl6_free_socklist(sk);
151 ipv6_sock_mc_close(sk);
152
e6848976
ACM		 153 /*
154 * Sock is moving from IPv6 to IPv4 (sk_prot), so
155 * remove it from the refcnt debug socks count in the
156 * original family...
157 */
158 sk_refcnt_debug_dec(sk);
159
1da177e4 160 if (sk->sk_protocol == IPPROTO_TCP) {
d83d8461 161 struct inet_connection_sock *icsk = inet_csk(sk);
1da177e4 162 local_bh_disable();
c29a0bc4
PE		 163 sock_prot_inuse_add(net, sk->sk_prot, -1);
164 sock_prot_inuse_add(net, &tcp_prot, 1);
1da177e4
LT		 165 local_bh_enable();
166 sk->sk_prot = &tcp_prot;
d83d8461 167 icsk->icsk_af_ops = &ipv4_specific;
1da177e4
LT		 168 sk->sk_socket->ops = &inet_stream_ops;
169 sk->sk_family = PF_INET;
d83d8461 170 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
1da177e4 171 } else {
ba4e58ec
GR		 172 struct proto *prot = &udp_prot;
173
db8dac20 174 if (sk->sk_protocol == IPPROTO_UDPLITE)
ba4e58ec 175 prot = &udplite_prot;
1da177e4 176 local_bh_disable();
c29a0bc4
PE		 177 sock_prot_inuse_add(net, sk->sk_prot, -1);
178 sock_prot_inuse_add(net, prot, 1);
1da177e4 179 local_bh_enable();
ba4e58ec 180 sk->sk_prot = prot;
1da177e4
LT		 181 sk->sk_socket->ops = &inet_dgram_ops;
182 sk->sk_family = PF_INET;
183 }
184 opt = xchg(&np->opt, NULL);
185 if (opt)
186 sock_kfree_s(sk, opt, opt->tot_len);
187 pktopt = xchg(&np->pktoptions, NULL);
188 if (pktopt)
189 kfree_skb(pktopt);
190
191 sk->sk_destruct = inet_sock_destruct;
e6848976
ACM		 192 /*
193 * ... and add it to the refcnt debug socks count
194 * in the new family. -acme
195 */
196 sk_refcnt_debug_inc(sk);
1da177e4
LT		 197 module_put(THIS_MODULE);
198 retv = 0;
199 break;
200 }
201 goto e_inval;
202
203 case IPV6_V6ONLY:
204 if (inet_sk(sk)->num)
205 goto e_inval;
206 np->ipv6only = valbool;
207 retv = 0;
208 break;
209
333fad53 210 case IPV6_RECVPKTINFO:
1da177e4
LT		 211 np->rxopt.bits.rxinfo = valbool;
212 retv = 0;
213 break;
1ab1457c 214
333fad53
YH		 215 case IPV6_2292PKTINFO:
216 np->rxopt.bits.rxoinfo = valbool;
217 retv = 0;
218 break;
1da177e4 219
333fad53 220 case IPV6_RECVHOPLIMIT:
1da177e4
LT		 221 np->rxopt.bits.rxhlim = valbool;
222 retv = 0;
223 break;
224
333fad53
YH		 225 case IPV6_2292HOPLIMIT:
226 np->rxopt.bits.rxohlim = valbool;
227 retv = 0;
228 break;
229
230 case IPV6_RECVRTHDR:
4c752098 231 np->rxopt.bits.srcrt = valbool;
1da177e4
LT		 232 retv = 0;
233 break;
234
333fad53 235 case IPV6_2292RTHDR:
4c752098 236 np->rxopt.bits.osrcrt = valbool;
333fad53
YH		 237 retv = 0;
238 break;
239
240 case IPV6_RECVHOPOPTS:
1da177e4
LT		 241 np->rxopt.bits.hopopts = valbool;
242 retv = 0;
243 break;
244
333fad53
YH		 245 case IPV6_2292HOPOPTS:
246 np->rxopt.bits.ohopopts = valbool;
247 retv = 0;
248 break;
249
250 case IPV6_RECVDSTOPTS:
1da177e4
LT		 251 np->rxopt.bits.dstopts = valbool;
252 retv = 0;
253 break;
254
333fad53
YH		 255 case IPV6_2292DSTOPTS:
256 np->rxopt.bits.odstopts = valbool;
257 retv = 0;
258 break;
259
41a1f8ea 260 case IPV6_TCLASS:
d0ee011f 261 if (val < -1 || val > 0xff)
41a1f8ea
YH		 262 goto e_inval;
263 np->tclass = val;
264 retv = 0;
265 break;
1ab1457c 266
41a1f8ea
YH		 267 case IPV6_RECVTCLASS:
268 np->rxopt.bits.rxtclass = valbool;
269 retv = 0;
270 break;
271
1da177e4
LT		 272 case IPV6_FLOWINFO:
273 np->rxopt.bits.rxflow = valbool;
274 retv = 0;
275 break;
276
333fad53
YH		 277 case IPV6_HOPOPTS:
278 case IPV6_RTHDRDSTOPTS:
279 case IPV6_RTHDR:
280 case IPV6_DSTOPTS:
281 {
282 struct ipv6_txoptions *opt;
283 if (optlen == 0)
cb422c46 284 optval = NULL;
333fad53
YH		 285
286 /* hop-by-hop / destination options are privileged option */
287 retv = -EPERM;
288 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
289 break;
290
291 retv = -EINVAL;
292 if (optlen & 0x7 || optlen > 8 * 255)
293 break;
294
295 opt = ipv6_renew_options(sk, np->opt, optname,
296 (struct ipv6_opt_hdr __user *)optval,
297 optlen);
298 if (IS_ERR(opt)) {
299 retv = PTR_ERR(opt);
300 break;
301 }
302
303 /* routing header option needs extra check */
dfee0a72 304 if (optname == IPV6_RTHDR && opt && opt->srcrt) {
333fad53 305 struct ipv6_rt_hdr *rthdr = opt->srcrt;
280a9d34 306 switch (rthdr->type) {
59fbb3a6 307#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
280a9d34 308 case IPV6_SRCRT_TYPE_2:
280a9d34 309 break;
bb4dbf9e 310#endif
280a9d34 311 default:
333fad53 312 goto sticky_done;
280a9d34
MN		 313 }
314
333fad53
YH		 315 if ((rthdr->hdrlen & 1) ||
316 (rthdr->hdrlen >> 1) != rthdr->segments_left)
317 goto sticky_done;
318 }
319
320 retv = 0;
d83d8461 321 if (inet_sk(sk)->is_icsk) {
333fad53 322 if (opt) {
d83d8461 323 struct inet_connection_sock *icsk = inet_csk(sk);
333fad53
YH		 324 if (!((1 << sk->sk_state) &
325 (TCPF_LISTEN | TCPF_CLOSE))
326 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
d83d8461
ACM		 327 icsk->icsk_ext_hdr_len =
328 opt->opt_flen + opt->opt_nflen;
329 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
333fad53
YH		 330 }
331 }
332 opt = xchg(&np->opt, opt);
333 sk_dst_reset(sk);
334 } else {
335 write_lock(&sk->sk_dst_lock);
336 opt = xchg(&np->opt, opt);
337 write_unlock(&sk->sk_dst_lock);
338 sk_dst_reset(sk);
339 }
340sticky_done:
341 if (opt)
342 sock_kfree_s(sk, opt, opt->tot_len);
343 break;
344 }
345
346 case IPV6_2292PKTOPTIONS:
1da177e4
LT		 347 {
348 struct ipv6_txoptions *opt = NULL;
349 struct msghdr msg;
350 struct flowi fl;
351 int junk;
352
353 fl.fl6_flowlabel = 0;
354 fl.oif = sk->sk_bound_dev_if;
355
356 if (optlen == 0)
357 goto update;
358
359 /* 1K is probably excessive
360 * 1K is surely not enough, 2K per standard header is 16K.
361 */
362 retv = -EINVAL;
363 if (optlen > 64*1024)
364 break;
365
366 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
367 retv = -ENOBUFS;
368 if (opt == NULL)
369 break;
370
371 memset(opt, 0, sizeof(*opt));
372 opt->tot_len = sizeof(*opt) + optlen;
373 retv = -EFAULT;
374 if (copy_from_user(opt+1, optval, optlen))
375 goto done;
376
377 msg.msg_controllen = optlen;
378 msg.msg_control = (void*)(opt+1);
379
41a1f8ea 380 retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk);
1da177e4
LT		 381 if (retv)
382 goto done;
383update:
384 retv = 0;
d83d8461 385 if (inet_sk(sk)->is_icsk) {
1da177e4 386 if (opt) {
d83d8461 387 struct inet_connection_sock *icsk = inet_csk(sk);
1da177e4
LT		 388 if (!((1 << sk->sk_state) &
389 (TCPF_LISTEN | TCPF_CLOSE))
390 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
d83d8461
ACM		 391 icsk->icsk_ext_hdr_len =
392 opt->opt_flen + opt->opt_nflen;
393 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
1da177e4
LT		 394 }
395 }
396 opt = xchg(&np->opt, opt);
397 sk_dst_reset(sk);
398 } else {
399 write_lock(&sk->sk_dst_lock);
400 opt = xchg(&np->opt, opt);
401 write_unlock(&sk->sk_dst_lock);
402 sk_dst_reset(sk);
403 }
404
405done:
406 if (opt)
407 sock_kfree_s(sk, opt, opt->tot_len);
408 break;
409 }
410 case IPV6_UNICAST_HOPS:
411 if (val > 255 || val < -1)
412 goto e_inval;
413 np->hop_limit = val;
414 retv = 0;
415 break;
416
417 case IPV6_MULTICAST_HOPS:
418 if (sk->sk_type == SOCK_STREAM)
419 goto e_inval;
420 if (val > 255 || val < -1)
421 goto e_inval;
422 np->mcast_hops = val;
423 retv = 0;
424 break;
425
426 case IPV6_MULTICAST_LOOP:
427 np->mc_loop = valbool;
428 retv = 0;
429 break;
430
431 case IPV6_MULTICAST_IF:
432 if (sk->sk_type == SOCK_STREAM)
433 goto e_inval;
1da177e4 434
4953f0fc
BH		 435 if (val) {
436 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
437 goto e_inval;
438
8a3edd80 439 if (__dev_get_by_index(net, val) == NULL) {
4953f0fc
BH		 440 retv = -ENODEV;
441 break;
442 }
1da177e4
LT		 443 }
444 np->mcast_oif = val;
445 retv = 0;
446 break;
447 case IPV6_ADD_MEMBERSHIP:
448 case IPV6_DROP_MEMBERSHIP:
449 {
450 struct ipv6_mreq mreq;
451
a96fb49b
FL		 452 retv = -EPROTO;
453 if (inet_sk(sk)->is_icsk)
454 break;
455
1da177e4
LT		 456 retv = -EFAULT;
457 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
458 break;
459
460 if (optname == IPV6_ADD_MEMBERSHIP)
461 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
462 else
463 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
464 break;
465 }
466 case IPV6_JOIN_ANYCAST:
467 case IPV6_LEAVE_ANYCAST:
468 {
469 struct ipv6_mreq mreq;
470
471 if (optlen != sizeof(struct ipv6_mreq))
472 goto e_inval;
473
474 retv = -EFAULT;
475 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
476 break;
477
478 if (optname == IPV6_JOIN_ANYCAST)
479 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
480 else
481 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
482 break;
483 }
484 case MCAST_JOIN_GROUP:
485 case MCAST_LEAVE_GROUP:
486 {
487 struct group_req greq;
488 struct sockaddr_in6 *psin6;
489
490 retv = -EFAULT;
491 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
492 break;
493 if (greq.gr_group.ss_family != AF_INET6) {
494 retv = -EADDRNOTAVAIL;
495 break;
496 }
497 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
498 if (optname == MCAST_JOIN_GROUP)
499 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
500 &psin6->sin6_addr);
501 else
502 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
503 &psin6->sin6_addr);
504 break;
505 }
506 case MCAST_JOIN_SOURCE_GROUP:
507 case MCAST_LEAVE_SOURCE_GROUP:
508 case MCAST_BLOCK_SOURCE:
509 case MCAST_UNBLOCK_SOURCE:
510 {
511 struct group_source_req greqs;
512 int omode, add;
513
514 if (optlen != sizeof(struct group_source_req))
515 goto e_inval;
516 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
517 retv = -EFAULT;
518 break;
519 }
520 if (greqs.gsr_group.ss_family != AF_INET6 ||
521 greqs.gsr_source.ss_family != AF_INET6) {
522 retv = -EADDRNOTAVAIL;
523 break;
524 }
525 if (optname == MCAST_BLOCK_SOURCE) {
526 omode = MCAST_EXCLUDE;
527 add = 1;
528 } else if (optname == MCAST_UNBLOCK_SOURCE) {
529 omode = MCAST_EXCLUDE;
530 add = 0;
531 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
532 struct sockaddr_in6 *psin6;
533
534 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
535 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
536 &psin6->sin6_addr);
c9e3e8b6
DS		 537 /* prior join w/ different source is ok */
538 if (retv && retv != -EADDRINUSE)
1da177e4
LT		 539 break;
540 omode = MCAST_INCLUDE;
541 add = 1;
c9e3e8b6 542 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
1da177e4
LT		 543 omode = MCAST_INCLUDE;
544 add = 0;
545 }
546 retv = ip6_mc_source(add, omode, sk, &greqs);
547 break;
548 }
549 case MCAST_MSFILTER:
550 {
1da177e4
LT		 551 extern int sysctl_mld_max_msf;
552 struct group_filter *gsf;
553
554 if (optlen < GROUP_FILTER_SIZE(0))
555 goto e_inval;
556 if (optlen > sysctl_optmem_max) {
557 retv = -ENOBUFS;
558 break;
559 }
8b3a7005 560 gsf = kmalloc(optlen,GFP_KERNEL);
cfcabdcc 561 if (!gsf) {
1da177e4
LT		 562 retv = -ENOBUFS;
563 break;
564 }
565 retv = -EFAULT;
566 if (copy_from_user(gsf, optval, optlen)) {
567 kfree(gsf);
568 break;
569 }
570 /* numsrc >= (4G-140)/128 overflow in 32 bits */
571 if (gsf->gf_numsrc >= 0x1ffffffU ||
572 gsf->gf_numsrc > sysctl_mld_max_msf) {
573 kfree(gsf);
574 retv = -ENOBUFS;
575 break;
576 }
577 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
578 kfree(gsf);
579 retv = -EINVAL;
580 break;
581 }
582 retv = ip6_mc_msfilter(sk, gsf);
583 kfree(gsf);
584
585 break;
586 }
587 case IPV6_ROUTER_ALERT:
588 retv = ip6_ra_control(sk, val, NULL);
589 break;
590 case IPV6_MTU_DISCOVER:
628a5c56 591 if (val<0 || val>3)
1da177e4
LT		 592 goto e_inval;
593 np->pmtudisc = val;
594 retv = 0;
595 break;
596 case IPV6_MTU:
597 if (val && val < IPV6_MIN_MTU)
598 goto e_inval;
599 np->frag_size = val;
600 retv = 0;
601 break;
602 case IPV6_RECVERR:
603 np->recverr = valbool;
604 if (!val)
605 skb_queue_purge(&sk->sk_error_queue);
606 retv = 0;
607 break;
608 case IPV6_FLOWINFO_SEND:
609 np->sndflow = valbool;
610 retv = 0;
611 break;
612 case IPV6_FLOWLABEL_MGR:
613 retv = ipv6_flowlabel_opt(sk, optval, optlen);
614 break;
615 case IPV6_IPSEC_POLICY:
616 case IPV6_XFRM_POLICY:
6fc0b4a7
HX		 617 retv = -EPERM;
618 if (!capable(CAP_NET_ADMIN))
619 break;
1da177e4
LT		 620 retv = xfrm_user_policy(sk, optname, optval, optlen);
621 break;
622
7cbca67c
YH		 623 case IPV6_ADDR_PREFERENCES:
624 {
625 unsigned int pref = 0;
626 unsigned int prefmask = ~0;
627
628 retv = -EINVAL;
629
630 /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */
631 switch (val & (IPV6_PREFER_SRC_PUBLIC|
632 IPV6_PREFER_SRC_TMP|
633 IPV6_PREFER_SRC_PUBTMP_DEFAULT)) {
634 case IPV6_PREFER_SRC_PUBLIC:
635 pref |= IPV6_PREFER_SRC_PUBLIC;
636 break;
637 case IPV6_PREFER_SRC_TMP:
638 pref |= IPV6_PREFER_SRC_TMP;
639 break;
640 case IPV6_PREFER_SRC_PUBTMP_DEFAULT:
641 break;
642 case 0:
643 goto pref_skip_pubtmp;
644 default:
645 goto e_inval;
646 }
647
648 prefmask &= ~(IPV6_PREFER_SRC_PUBLIC|
649 IPV6_PREFER_SRC_TMP);
650pref_skip_pubtmp:
651
652 /* check HOME/COA conflicts */
653 switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) {
654 case IPV6_PREFER_SRC_HOME:
655 break;
656 case IPV6_PREFER_SRC_COA:
657 pref |= IPV6_PREFER_SRC_COA;
658 case 0:
659 goto pref_skip_coa;
660 default:
661 goto e_inval;
662 }
663
664 prefmask &= ~IPV6_PREFER_SRC_COA;
665pref_skip_coa:
666
667 /* check CGA/NONCGA conflicts */
668 switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) {
669 case IPV6_PREFER_SRC_CGA:
670 case IPV6_PREFER_SRC_NONCGA:
671 case 0:
672 break;
673 default:
674 goto e_inval;
675 }
676
677 np->srcprefs = (np->srcprefs & prefmask) | pref;
678 retv = 0;
679
680 break;
681 }
1da177e4 682 }
7cbca67c 683
1da177e4
LT		 684 release_sock(sk);
685
1da177e4
LT		 686 return retv;
687
688e_inval:
689 release_sock(sk);
690 return -EINVAL;
691}
692
3fdadf7d
DM		 693int ipv6_setsockopt(struct sock *sk, int level, int optname,
694 char __user *optval, int optlen)
695{
696 int err;
697
698 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
699 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
700
701 if (level != SOL_IPV6)
702 return -ENOPROTOOPT;
703
704 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
705#ifdef CONFIG_NETFILTER
706 /* we need to exclude all possible ENOPROTOOPTs except default case */
707 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
708 optname != IPV6_XFRM_POLICY) {
709 lock_sock(sk);
710 err = nf_setsockopt(sk, PF_INET6, optname, optval,
711 optlen);
712 release_sock(sk);
713 }
714#endif
715 return err;
716}
717
7159039a 718EXPORT_SYMBOL(ipv6_setsockopt);
3fdadf7d
DM		 719
720#ifdef CONFIG_COMPAT
721int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
543d9cfe 722 char __user *optval, int optlen)
3fdadf7d
DM		 723{
724 int err;
725
726 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
543d9cfe
ACM		 727 if (udp_prot.compat_setsockopt != NULL)
728 return udp_prot.compat_setsockopt(sk, level, optname,
729 optval, optlen);
730 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
3fdadf7d
DM		 731 }
732
733 if (level != SOL_IPV6)
734 return -ENOPROTOOPT;
735
736 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
737#ifdef CONFIG_NETFILTER
738 /* we need to exclude all possible ENOPROTOOPTs except default case */
739 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
543d9cfe 740 optname != IPV6_XFRM_POLICY) {
3fdadf7d 741 lock_sock(sk);
543d9cfe
ACM		 742 err = compat_nf_setsockopt(sk, PF_INET6, optname,
743 optval, optlen);
3fdadf7d
DM		 744 release_sock(sk);
745 }
746#endif
747 return err;
748}
543d9cfe
ACM		 749
750EXPORT_SYMBOL(compat_ipv6_setsockopt);
3fdadf7d
DM		 751#endif
752
28693079 753static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
4c6510a7 754 int optname, char __user *optval, int len)
333fad53 755{
28693079
DM		 756 struct ipv6_opt_hdr *hdr;
757
4c6510a7
YH		 758 if (!opt)
759 return 0;
760
761 switch(optname) {
762 case IPV6_HOPOPTS:
763 hdr = opt->hopopt;
764 break;
765 case IPV6_RTHDRDSTOPTS:
766 hdr = opt->dst0opt;
767 break;
768 case IPV6_RTHDR:
769 hdr = (struct ipv6_opt_hdr *)opt->srcrt;
770 break;
771 case IPV6_DSTOPTS:
772 hdr = opt->dst1opt;
773 break;
774 default:
775 return -EINVAL; /* should not happen */
776 }
777
778 if (!hdr)
333fad53 779 return 0;
28693079 780
d2b02ed9 781 len = min_t(unsigned int, len, ipv6_optlen(hdr));
660adc6e 782 if (copy_to_user(optval, hdr, len))
333fad53 783 return -EFAULT;
e5268f12 784 return ipv6_optlen(hdr);
333fad53
YH		 785}
786
3fdadf7d 787static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
1da177e4
LT		 788 char __user *optval, int __user *optlen)
789{
790 struct ipv6_pinfo *np = inet6_sk(sk);
791 int len;
792 int val;
793
7bc570c8
YH		 794 if (ip6_mroute_opt(optname))
795 return ip6_mroute_getsockopt(sk, optname, optval, optlen);
796
1da177e4
LT		 797 if (get_user(len, optlen))
798 return -EFAULT;
799 switch (optname) {
800 case IPV6_ADDRFORM:
801 if (sk->sk_protocol != IPPROTO_UDP &&
ba4e58ec 802 sk->sk_protocol != IPPROTO_UDPLITE &&
1da177e4
LT		 803 sk->sk_protocol != IPPROTO_TCP)
804 return -EINVAL;
805 if (sk->sk_state != TCP_ESTABLISHED)
806 return -ENOTCONN;
807 val = sk->sk_family;
808 break;
809 case MCAST_MSFILTER:
810 {
811 struct group_filter gsf;
812 int err;
813
814 if (len < GROUP_FILTER_SIZE(0))
815 return -EINVAL;
816 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
817 return -EFAULT;
818 lock_sock(sk);
819 err = ip6_mc_msfget(sk, &gsf,
820 (struct group_filter __user *)optval, optlen);
821 release_sock(sk);
822 return err;
823 }
824
333fad53 825 case IPV6_2292PKTOPTIONS:
1da177e4
LT		 826 {
827 struct msghdr msg;
828 struct sk_buff *skb;
829
830 if (sk->sk_type != SOCK_STREAM)
831 return -ENOPROTOOPT;
832
833 msg.msg_control = optval;
834 msg.msg_controllen = len;
835 msg.msg_flags = 0;
836
837 lock_sock(sk);
838 skb = np->pktoptions;
839 if (skb)
840 atomic_inc(&skb->users);
841 release_sock(sk);
842
843 if (skb) {
844 int err = datagram_recv_ctl(sk, &msg, skb);
845 kfree_skb(skb);
846 if (err)
847 return err;
848 } else {
849 if (np->rxopt.bits.rxinfo) {
850 struct in6_pktinfo src_info;
851 src_info.ipi6_ifindex = np->mcast_oif;
852 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
853 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
854 }
855 if (np->rxopt.bits.rxhlim) {
856 int hlim = np->mcast_hops;
857 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
858 }
333fad53
YH		 859 if (np->rxopt.bits.rxoinfo) {
860 struct in6_pktinfo src_info;
861 src_info.ipi6_ifindex = np->mcast_oif;
862 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
863 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
864 }
865 if (np->rxopt.bits.rxohlim) {
866 int hlim = np->mcast_hops;
867 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
868 }
1da177e4
LT		 869 }
870 len -= msg.msg_controllen;
871 return put_user(len, optlen);
872 }
873 case IPV6_MTU:
874 {
875 struct dst_entry *dst;
1ab1457c 876 val = 0;
1da177e4
LT		 877 lock_sock(sk);
878 dst = sk_dst_get(sk);
879 if (dst) {
880 val = dst_mtu(dst);
881 dst_release(dst);
882 }
883 release_sock(sk);
884 if (!val)
885 return -ENOTCONN;
886 break;
887 }
888
889 case IPV6_V6ONLY:
890 val = np->ipv6only;
891 break;
892
333fad53 893 case IPV6_RECVPKTINFO:
1da177e4
LT		 894 val = np->rxopt.bits.rxinfo;
895 break;
896
333fad53
YH		 897 case IPV6_2292PKTINFO:
898 val = np->rxopt.bits.rxoinfo;
899 break;
900
901 case IPV6_RECVHOPLIMIT:
1da177e4
LT		 902 val = np->rxopt.bits.rxhlim;
903 break;
904
333fad53
YH		 905 case IPV6_2292HOPLIMIT:
906 val = np->rxopt.bits.rxohlim;
907 break;
908
909 case IPV6_RECVRTHDR:
1da177e4
LT		 910 val = np->rxopt.bits.srcrt;
911 break;
912
333fad53
YH		 913 case IPV6_2292RTHDR:
914 val = np->rxopt.bits.osrcrt;
915 break;
916
1da177e4 917 case IPV6_HOPOPTS:
333fad53
YH		 918 case IPV6_RTHDRDSTOPTS:
919 case IPV6_RTHDR:
920 case IPV6_DSTOPTS:
921 {
922
923 lock_sock(sk);
28693079 924 len = ipv6_getsockopt_sticky(sk, np->opt,
4c6510a7 925 optname, optval, len);
333fad53
YH		 926 release_sock(sk);
927 return put_user(len, optlen);
928 }
929
930 case IPV6_RECVHOPOPTS:
1da177e4
LT		 931 val = np->rxopt.bits.hopopts;
932 break;
933
333fad53
YH		 934 case IPV6_2292HOPOPTS:
935 val = np->rxopt.bits.ohopopts;
936 break;
937
938 case IPV6_RECVDSTOPTS:
1da177e4
LT		 939 val = np->rxopt.bits.dstopts;
940 break;
941
333fad53
YH		 942 case IPV6_2292DSTOPTS:
943 val = np->rxopt.bits.odstopts;
944 break;
945
41a1f8ea
YH		 946 case IPV6_TCLASS:
947 val = np->tclass;
d0ee011f
RDC		 948 if (val < 0)
949 val = 0;
41a1f8ea
YH		 950 break;
951
952 case IPV6_RECVTCLASS:
953 val = np->rxopt.bits.rxtclass;
954 break;
955
1da177e4
LT		 956 case IPV6_FLOWINFO:
957 val = np->rxopt.bits.rxflow;
958 break;
959
960 case IPV6_UNICAST_HOPS:
1da177e4 961 case IPV6_MULTICAST_HOPS:
befffe90
BH		 962 {
963 struct dst_entry *dst;
964
965 if (optname == IPV6_UNICAST_HOPS)
966 val = np->hop_limit;
967 else
968 val = np->mcast_hops;
969
970 dst = sk_dst_get(sk);
971 if (dst) {
972 if (val < 0)
6b75d090 973 val = ip6_dst_hoplimit(dst);
befffe90
BH		 974 dst_release(dst);
975 }
976 if (val < 0)
977 val = ipv6_devconf.hop_limit;
1da177e4 978 break;
befffe90 979 }
1da177e4
LT		 980
981 case IPV6_MULTICAST_LOOP:
982 val = np->mc_loop;
983 break;
984
985 case IPV6_MULTICAST_IF:
986 val = np->mcast_oif;
987 break;
988
989 case IPV6_MTU_DISCOVER:
990 val = np->pmtudisc;
991 break;
992
993 case IPV6_RECVERR:
994 val = np->recverr;
995 break;
996
997 case IPV6_FLOWINFO_SEND:
998 val = np->sndflow;
999 break;
1000
7cbca67c
YH		 1001 case IPV6_ADDR_PREFERENCES:
1002 val = 0;
1003
1004 if (np->srcprefs & IPV6_PREFER_SRC_TMP)
1005 val |= IPV6_PREFER_SRC_TMP;
1006 else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC)
1007 val |= IPV6_PREFER_SRC_PUBLIC;
1008 else {
1009 /* XXX: should we return system default? */
1010 val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT;
1011 }
1012
1013 if (np->srcprefs & IPV6_PREFER_SRC_COA)
1014 val |= IPV6_PREFER_SRC_COA;
1015 else
1016 val |= IPV6_PREFER_SRC_HOME;
1017 break;
1018
1da177e4 1019 default:
cf6fc4a9 1020 return -ENOPROTOOPT;
1da177e4
LT		 1021 }
1022 len = min_t(unsigned int, sizeof(int), len);
1023 if(put_user(len, optlen))
1024 return -EFAULT;
1025 if(copy_to_user(optval,&val,len))
1026 return -EFAULT;
1027 return 0;
1028}
1029
3fdadf7d
DM		 1030int ipv6_getsockopt(struct sock *sk, int level, int optname,
1031 char __user *optval, int __user *optlen)
1032{
1033 int err;
1034
1035 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
1036 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1037
1038 if(level != SOL_IPV6)
1039 return -ENOPROTOOPT;
1040
1041 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1042#ifdef CONFIG_NETFILTER
cf6fc4a9
WY		 1043 /* we need to exclude all possible ENOPROTOOPTs except default case */
1044 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
3fdadf7d
DM		 1045 int len;
1046
1047 if (get_user(len, optlen))
1048 return -EFAULT;
1049
1050 lock_sock(sk);
1051 err = nf_getsockopt(sk, PF_INET6, optname, optval,
1052 &len);
1053 release_sock(sk);
1054 if (err >= 0)
1055 err = put_user(len, optlen);
1056 }
1057#endif
1058 return err;
1059}
1060
7159039a
YH		 1061EXPORT_SYMBOL(ipv6_getsockopt);
1062
3fdadf7d
DM		 1063#ifdef CONFIG_COMPAT
1064int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
543d9cfe 1065 char __user *optval, int __user *optlen)
3fdadf7d
DM		 1066{
1067 int err;
1068
1069 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
543d9cfe
ACM		 1070 if (udp_prot.compat_getsockopt != NULL)
1071 return udp_prot.compat_getsockopt(sk, level, optname,
1072 optval, optlen);
1073 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
3fdadf7d
DM		 1074 }
1075
543d9cfe 1076 if (level != SOL_IPV6)
3fdadf7d
DM		 1077 return -ENOPROTOOPT;
1078
1079 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1080#ifdef CONFIG_NETFILTER
cf6fc4a9
WY		 1081 /* we need to exclude all possible ENOPROTOOPTs except default case */
1082 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
3fdadf7d
DM		 1083 int len;
1084
1085 if (get_user(len, optlen))
1086 return -EFAULT;
1087
1088 lock_sock(sk);
543d9cfe
ACM		 1089 err = compat_nf_getsockopt(sk, PF_INET6,
1090 optname, optval, &len);
3fdadf7d
DM		 1091 release_sock(sk);
1092 if (err >= 0)
1093 err = put_user(len, optlen);
1094 }
1095#endif
1096 return err;
1097}
543d9cfe
ACM		 1098
1099EXPORT_SYMBOL(compat_ipv6_getsockopt);
3fdadf7d
DM		 1100#endif
1101
Linux kernel - Deliverables
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