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[IPV6]: Use bitfields for hop_limit and mcast_hops.
[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 *
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);
8a3edd80 110 struct net *net = sk->sk_net;
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
1da177e4
LT		 620 }
621 release_sock(sk);
622
1da177e4
LT		 623 return retv;
624
625e_inval:
626 release_sock(sk);
627 return -EINVAL;
628}
629
3fdadf7d
DM		 630int ipv6_setsockopt(struct sock *sk, int level, int optname,
631 char __user *optval, int optlen)
632{
633 int err;
634
635 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
636 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
637
638 if (level != SOL_IPV6)
639 return -ENOPROTOOPT;
640
641 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
642#ifdef CONFIG_NETFILTER
643 /* we need to exclude all possible ENOPROTOOPTs except default case */
644 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
645 optname != IPV6_XFRM_POLICY) {
646 lock_sock(sk);
647 err = nf_setsockopt(sk, PF_INET6, optname, optval,
648 optlen);
649 release_sock(sk);
650 }
651#endif
652 return err;
653}
654
7159039a 655EXPORT_SYMBOL(ipv6_setsockopt);
3fdadf7d
DM		 656
657#ifdef CONFIG_COMPAT
658int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
543d9cfe 659 char __user *optval, int optlen)
3fdadf7d
DM		 660{
661 int err;
662
663 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
543d9cfe
ACM		 664 if (udp_prot.compat_setsockopt != NULL)
665 return udp_prot.compat_setsockopt(sk, level, optname,
666 optval, optlen);
667 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
3fdadf7d
DM		 668 }
669
670 if (level != SOL_IPV6)
671 return -ENOPROTOOPT;
672
673 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
674#ifdef CONFIG_NETFILTER
675 /* we need to exclude all possible ENOPROTOOPTs except default case */
676 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
543d9cfe 677 optname != IPV6_XFRM_POLICY) {
3fdadf7d 678 lock_sock(sk);
543d9cfe
ACM		 679 err = compat_nf_setsockopt(sk, PF_INET6, optname,
680 optval, optlen);
3fdadf7d
DM		 681 release_sock(sk);
682 }
683#endif
684 return err;
685}
543d9cfe
ACM		 686
687EXPORT_SYMBOL(compat_ipv6_setsockopt);
3fdadf7d
DM		 688#endif
689
28693079 690static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
4c6510a7 691 int optname, char __user *optval, int len)
333fad53 692{
28693079
DM		 693 struct ipv6_opt_hdr *hdr;
694
4c6510a7
YH		 695 if (!opt)
696 return 0;
697
698 switch(optname) {
699 case IPV6_HOPOPTS:
700 hdr = opt->hopopt;
701 break;
702 case IPV6_RTHDRDSTOPTS:
703 hdr = opt->dst0opt;
704 break;
705 case IPV6_RTHDR:
706 hdr = (struct ipv6_opt_hdr *)opt->srcrt;
707 break;
708 case IPV6_DSTOPTS:
709 hdr = opt->dst1opt;
710 break;
711 default:
712 return -EINVAL; /* should not happen */
713 }
714
715 if (!hdr)
333fad53 716 return 0;
28693079 717
d2b02ed9 718 len = min_t(unsigned int, len, ipv6_optlen(hdr));
660adc6e 719 if (copy_to_user(optval, hdr, len))
333fad53 720 return -EFAULT;
e5268f12 721 return ipv6_optlen(hdr);
333fad53
YH		 722}
723
3fdadf7d 724static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
1da177e4
LT		 725 char __user *optval, int __user *optlen)
726{
727 struct ipv6_pinfo *np = inet6_sk(sk);
728 int len;
729 int val;
730
1da177e4
LT		 731 if (get_user(len, optlen))
732 return -EFAULT;
733 switch (optname) {
734 case IPV6_ADDRFORM:
735 if (sk->sk_protocol != IPPROTO_UDP &&
ba4e58ec 736 sk->sk_protocol != IPPROTO_UDPLITE &&
1da177e4
LT		 737 sk->sk_protocol != IPPROTO_TCP)
738 return -EINVAL;
739 if (sk->sk_state != TCP_ESTABLISHED)
740 return -ENOTCONN;
741 val = sk->sk_family;
742 break;
743 case MCAST_MSFILTER:
744 {
745 struct group_filter gsf;
746 int err;
747
748 if (len < GROUP_FILTER_SIZE(0))
749 return -EINVAL;
750 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
751 return -EFAULT;
752 lock_sock(sk);
753 err = ip6_mc_msfget(sk, &gsf,
754 (struct group_filter __user *)optval, optlen);
755 release_sock(sk);
756 return err;
757 }
758
333fad53 759 case IPV6_2292PKTOPTIONS:
1da177e4
LT		 760 {
761 struct msghdr msg;
762 struct sk_buff *skb;
763
764 if (sk->sk_type != SOCK_STREAM)
765 return -ENOPROTOOPT;
766
767 msg.msg_control = optval;
768 msg.msg_controllen = len;
769 msg.msg_flags = 0;
770
771 lock_sock(sk);
772 skb = np->pktoptions;
773 if (skb)
774 atomic_inc(&skb->users);
775 release_sock(sk);
776
777 if (skb) {
778 int err = datagram_recv_ctl(sk, &msg, skb);
779 kfree_skb(skb);
780 if (err)
781 return err;
782 } else {
783 if (np->rxopt.bits.rxinfo) {
784 struct in6_pktinfo src_info;
785 src_info.ipi6_ifindex = np->mcast_oif;
786 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
787 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
788 }
789 if (np->rxopt.bits.rxhlim) {
790 int hlim = np->mcast_hops;
791 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
792 }
333fad53
YH		 793 if (np->rxopt.bits.rxoinfo) {
794 struct in6_pktinfo src_info;
795 src_info.ipi6_ifindex = np->mcast_oif;
796 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
797 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
798 }
799 if (np->rxopt.bits.rxohlim) {
800 int hlim = np->mcast_hops;
801 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
802 }
1da177e4
LT		 803 }
804 len -= msg.msg_controllen;
805 return put_user(len, optlen);
806 }
807 case IPV6_MTU:
808 {
809 struct dst_entry *dst;
1ab1457c 810 val = 0;
1da177e4
LT		 811 lock_sock(sk);
812 dst = sk_dst_get(sk);
813 if (dst) {
814 val = dst_mtu(dst);
815 dst_release(dst);
816 }
817 release_sock(sk);
818 if (!val)
819 return -ENOTCONN;
820 break;
821 }
822
823 case IPV6_V6ONLY:
824 val = np->ipv6only;
825 break;
826
333fad53 827 case IPV6_RECVPKTINFO:
1da177e4
LT		 828 val = np->rxopt.bits.rxinfo;
829 break;
830
333fad53
YH		 831 case IPV6_2292PKTINFO:
832 val = np->rxopt.bits.rxoinfo;
833 break;
834
835 case IPV6_RECVHOPLIMIT:
1da177e4
LT		 836 val = np->rxopt.bits.rxhlim;
837 break;
838
333fad53
YH		 839 case IPV6_2292HOPLIMIT:
840 val = np->rxopt.bits.rxohlim;
841 break;
842
843 case IPV6_RECVRTHDR:
1da177e4
LT		 844 val = np->rxopt.bits.srcrt;
845 break;
846
333fad53
YH		 847 case IPV6_2292RTHDR:
848 val = np->rxopt.bits.osrcrt;
849 break;
850
1da177e4 851 case IPV6_HOPOPTS:
333fad53
YH		 852 case IPV6_RTHDRDSTOPTS:
853 case IPV6_RTHDR:
854 case IPV6_DSTOPTS:
855 {
856
857 lock_sock(sk);
28693079 858 len = ipv6_getsockopt_sticky(sk, np->opt,
4c6510a7 859 optname, optval, len);
333fad53
YH		 860 release_sock(sk);
861 return put_user(len, optlen);
862 }
863
864 case IPV6_RECVHOPOPTS:
1da177e4
LT		 865 val = np->rxopt.bits.hopopts;
866 break;
867
333fad53
YH		 868 case IPV6_2292HOPOPTS:
869 val = np->rxopt.bits.ohopopts;
870 break;
871
872 case IPV6_RECVDSTOPTS:
1da177e4
LT		 873 val = np->rxopt.bits.dstopts;
874 break;
875
333fad53
YH		 876 case IPV6_2292DSTOPTS:
877 val = np->rxopt.bits.odstopts;
878 break;
879
41a1f8ea
YH		 880 case IPV6_TCLASS:
881 val = np->tclass;
d0ee011f
RDC		 882 if (val < 0)
883 val = 0;
41a1f8ea
YH		 884 break;
885
886 case IPV6_RECVTCLASS:
887 val = np->rxopt.bits.rxtclass;
888 break;
889
1da177e4
LT		 890 case IPV6_FLOWINFO:
891 val = np->rxopt.bits.rxflow;
892 break;
893
894 case IPV6_UNICAST_HOPS:
1da177e4 895 case IPV6_MULTICAST_HOPS:
befffe90
BH		 896 {
897 struct dst_entry *dst;
898
899 if (optname == IPV6_UNICAST_HOPS)
900 val = np->hop_limit;
901 else
902 val = np->mcast_hops;
903
904 dst = sk_dst_get(sk);
905 if (dst) {
906 if (val < 0)
6b75d090 907 val = ip6_dst_hoplimit(dst);
befffe90
BH		 908 dst_release(dst);
909 }
910 if (val < 0)
911 val = ipv6_devconf.hop_limit;
1da177e4 912 break;
befffe90 913 }
1da177e4
LT		 914
915 case IPV6_MULTICAST_LOOP:
916 val = np->mc_loop;
917 break;
918
919 case IPV6_MULTICAST_IF:
920 val = np->mcast_oif;
921 break;
922
923 case IPV6_MTU_DISCOVER:
924 val = np->pmtudisc;
925 break;
926
927 case IPV6_RECVERR:
928 val = np->recverr;
929 break;
930
931 case IPV6_FLOWINFO_SEND:
932 val = np->sndflow;
933 break;
934
935 default:
cf6fc4a9 936 return -ENOPROTOOPT;
1da177e4
LT		 937 }
938 len = min_t(unsigned int, sizeof(int), len);
939 if(put_user(len, optlen))
940 return -EFAULT;
941 if(copy_to_user(optval,&val,len))
942 return -EFAULT;
943 return 0;
944}
945
3fdadf7d
DM		 946int ipv6_getsockopt(struct sock *sk, int level, int optname,
947 char __user *optval, int __user *optlen)
948{
949 int err;
950
951 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
952 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
953
954 if(level != SOL_IPV6)
955 return -ENOPROTOOPT;
956
957 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
958#ifdef CONFIG_NETFILTER
cf6fc4a9
WY		 959 /* we need to exclude all possible ENOPROTOOPTs except default case */
960 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
3fdadf7d
DM		 961 int len;
962
963 if (get_user(len, optlen))
964 return -EFAULT;
965
966 lock_sock(sk);
967 err = nf_getsockopt(sk, PF_INET6, optname, optval,
968 &len);
969 release_sock(sk);
970 if (err >= 0)
971 err = put_user(len, optlen);
972 }
973#endif
974 return err;
975}
976
7159039a
YH		 977EXPORT_SYMBOL(ipv6_getsockopt);
978
3fdadf7d
DM		 979#ifdef CONFIG_COMPAT
980int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
543d9cfe 981 char __user *optval, int __user *optlen)
3fdadf7d
DM		 982{
983 int err;
984
985 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
543d9cfe
ACM		 986 if (udp_prot.compat_getsockopt != NULL)
987 return udp_prot.compat_getsockopt(sk, level, optname,
988 optval, optlen);
989 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
3fdadf7d
DM		 990 }
991
543d9cfe 992 if (level != SOL_IPV6)
3fdadf7d
DM		 993 return -ENOPROTOOPT;
994
995 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
996#ifdef CONFIG_NETFILTER
cf6fc4a9
WY		 997 /* we need to exclude all possible ENOPROTOOPTs except default case */
998 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
3fdadf7d
DM		 999 int len;
1000
1001 if (get_user(len, optlen))
1002 return -EFAULT;
1003
1004 lock_sock(sk);
543d9cfe
ACM		 1005 err = compat_nf_getsockopt(sk, PF_INET6,
1006 optname, optval, &len);
3fdadf7d
DM		 1007 release_sock(sk);
1008 if (err >= 0)
1009 err = put_user(len, optlen);
1010 }
1011#endif
1012 return err;
1013}
543d9cfe
ACM		 1014
1015EXPORT_SYMBOL(compat_ipv6_getsockopt);
3fdadf7d
DM		 1016#endif
1017
kernel source for telekom puls (alcatel/mediatek)