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[IPV6]: Support several new sockopt / ancillary data in Advanced API (RFC3542).
[people/ms/linux.git] / net / ipv6 / ipv6_sockglue.c
CommitLineData
1da177e4
LT		 1/*
2 * IPv6 BSD socket options interface
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <roque@di.fc.ul.pt>
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>
29#include <linux/config.h>
30#include <linux/errno.h>
31#include <linux/types.h>
32#include <linux/socket.h>
33#include <linux/sockios.h>
34#include <linux/sched.h>
35#include <linux/net.h>
36#include <linux/in6.h>
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>
54#include <net/xfrm.h>
55
56#include <asm/uaccess.h>
57
ba89966c 58DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly;
1da177e4
LT		 59
60static struct packet_type ipv6_packet_type = {
61 .type = __constant_htons(ETH_P_IPV6),
62 .func = ipv6_rcv,
63};
64
65struct ip6_ra_chain *ip6_ra_chain;
66DEFINE_RWLOCK(ip6_ra_lock);
67
68int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *))
69{
70 struct ip6_ra_chain *ra, *new_ra, **rap;
71
72 /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
73 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW)
74 return -EINVAL;
75
76 new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
77
78 write_lock_bh(&ip6_ra_lock);
79 for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
80 if (ra->sk == sk) {
81 if (sel>=0) {
82 write_unlock_bh(&ip6_ra_lock);
83 if (new_ra)
84 kfree(new_ra);
85 return -EADDRINUSE;
86 }
87
88 *rap = ra->next;
89 write_unlock_bh(&ip6_ra_lock);
90
91 if (ra->destructor)
92 ra->destructor(sk);
93 sock_put(sk);
94 kfree(ra);
95 return 0;
96 }
97 }
98 if (new_ra == NULL) {
99 write_unlock_bh(&ip6_ra_lock);
100 return -ENOBUFS;
101 }
102 new_ra->sk = sk;
103 new_ra->sel = sel;
104 new_ra->destructor = destructor;
105 new_ra->next = ra;
106 *rap = new_ra;
107 sock_hold(sk);
108 write_unlock_bh(&ip6_ra_lock);
109 return 0;
110}
111
1da177e4
LT		 112int ipv6_setsockopt(struct sock *sk, int level, int optname,
113 char __user *optval, int optlen)
114{
115 struct ipv6_pinfo *np = inet6_sk(sk);
116 int val, valbool;
117 int retv = -ENOPROTOOPT;
118
119 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
120 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
121
122 if(level!=SOL_IPV6)
123 goto out;
124
125 if (optval == NULL)
126 val=0;
127 else if (get_user(val, (int __user *) optval))
128 return -EFAULT;
129
130 valbool = (val!=0);
131
132 lock_sock(sk);
133
134 switch (optname) {
135
136 case IPV6_ADDRFORM:
137 if (val == PF_INET) {
138 struct ipv6_txoptions *opt;
139 struct sk_buff *pktopt;
140
141 if (sk->sk_protocol != IPPROTO_UDP &&
142 sk->sk_protocol != IPPROTO_TCP)
143 break;
144
145 if (sk->sk_state != TCP_ESTABLISHED) {
146 retv = -ENOTCONN;
147 break;
148 }
149
150 if (ipv6_only_sock(sk) ||
151 !(ipv6_addr_type(&np->daddr) & IPV6_ADDR_MAPPED)) {
152 retv = -EADDRNOTAVAIL;
153 break;
154 }
155
156 fl6_free_socklist(sk);
157 ipv6_sock_mc_close(sk);
158
e6848976
ACM		 159 /*
160 * Sock is moving from IPv6 to IPv4 (sk_prot), so
161 * remove it from the refcnt debug socks count in the
162 * original family...
163 */
164 sk_refcnt_debug_dec(sk);
165
1da177e4
LT		 166 if (sk->sk_protocol == IPPROTO_TCP) {
167 struct tcp_sock *tp = tcp_sk(sk);
168
169 local_bh_disable();
170 sock_prot_dec_use(sk->sk_prot);
171 sock_prot_inc_use(&tcp_prot);
172 local_bh_enable();
173 sk->sk_prot = &tcp_prot;
174 tp->af_specific = &ipv4_specific;
175 sk->sk_socket->ops = &inet_stream_ops;
176 sk->sk_family = PF_INET;
177 tcp_sync_mss(sk, tp->pmtu_cookie);
178 } else {
179 local_bh_disable();
180 sock_prot_dec_use(sk->sk_prot);
181 sock_prot_inc_use(&udp_prot);
182 local_bh_enable();
183 sk->sk_prot = &udp_prot;
184 sk->sk_socket->ops = &inet_dgram_ops;
185 sk->sk_family = PF_INET;
186 }
187 opt = xchg(&np->opt, NULL);
188 if (opt)
189 sock_kfree_s(sk, opt, opt->tot_len);
190 pktopt = xchg(&np->pktoptions, NULL);
191 if (pktopt)
192 kfree_skb(pktopt);
193
194 sk->sk_destruct = inet_sock_destruct;
e6848976
ACM		 195 /*
196 * ... and add it to the refcnt debug socks count
197 * in the new family. -acme
198 */
199 sk_refcnt_debug_inc(sk);
1da177e4
LT		 200 module_put(THIS_MODULE);
201 retv = 0;
202 break;
203 }
204 goto e_inval;
205
206 case IPV6_V6ONLY:
207 if (inet_sk(sk)->num)
208 goto e_inval;
209 np->ipv6only = valbool;
210 retv = 0;
211 break;
212
333fad53 213 case IPV6_RECVPKTINFO:
1da177e4
LT		 214 np->rxopt.bits.rxinfo = valbool;
215 retv = 0;
216 break;
333fad53
YH		 217
218 case IPV6_2292PKTINFO:
219 np->rxopt.bits.rxoinfo = valbool;
220 retv = 0;
221 break;
1da177e4 222
333fad53 223 case IPV6_RECVHOPLIMIT:
1da177e4
LT		 224 np->rxopt.bits.rxhlim = valbool;
225 retv = 0;
226 break;
227
333fad53
YH		 228 case IPV6_2292HOPLIMIT:
229 np->rxopt.bits.rxohlim = valbool;
230 retv = 0;
231 break;
232
233 case IPV6_RECVRTHDR:
1da177e4
LT		 234 if (val < 0 || val > 2)
235 goto e_inval;
236 np->rxopt.bits.srcrt = val;
237 retv = 0;
238 break;
239
333fad53
YH		 240 case IPV6_2292RTHDR:
241 if (val < 0 || val > 2)
242 goto e_inval;
243 np->rxopt.bits.osrcrt = val;
244 retv = 0;
245 break;
246
247 case IPV6_RECVHOPOPTS:
1da177e4
LT		 248 np->rxopt.bits.hopopts = valbool;
249 retv = 0;
250 break;
251
333fad53
YH		 252 case IPV6_2292HOPOPTS:
253 np->rxopt.bits.ohopopts = valbool;
254 retv = 0;
255 break;
256
257 case IPV6_RECVDSTOPTS:
1da177e4
LT		 258 np->rxopt.bits.dstopts = valbool;
259 retv = 0;
260 break;
261
333fad53
YH		 262 case IPV6_2292DSTOPTS:
263 np->rxopt.bits.odstopts = valbool;
264 retv = 0;
265 break;
266
1da177e4
LT		 267 case IPV6_FLOWINFO:
268 np->rxopt.bits.rxflow = valbool;
269 retv = 0;
270 break;
271
333fad53
YH		 272 case IPV6_HOPOPTS:
273 case IPV6_RTHDRDSTOPTS:
274 case IPV6_RTHDR:
275 case IPV6_DSTOPTS:
276 {
277 struct ipv6_txoptions *opt;
278 if (optlen == 0)
279 optval = 0;
280
281 /* hop-by-hop / destination options are privileged option */
282 retv = -EPERM;
283 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
284 break;
285
286 retv = -EINVAL;
287 if (optlen & 0x7 || optlen > 8 * 255)
288 break;
289
290 opt = ipv6_renew_options(sk, np->opt, optname,
291 (struct ipv6_opt_hdr __user *)optval,
292 optlen);
293 if (IS_ERR(opt)) {
294 retv = PTR_ERR(opt);
295 break;
296 }
297
298 /* routing header option needs extra check */
299 if (optname == IPV6_RTHDR && opt->srcrt) {
300 struct ipv6_rt_hdr *rthdr = opt->srcrt;
301 if (rthdr->type)
302 goto sticky_done;
303 if ((rthdr->hdrlen & 1) ||
304 (rthdr->hdrlen >> 1) != rthdr->segments_left)
305 goto sticky_done;
306 }
307
308 retv = 0;
309 if (sk->sk_type == SOCK_STREAM) {
310 if (opt) {
311 struct tcp_sock *tp = tcp_sk(sk);
312 if (!((1 << sk->sk_state) &
313 (TCPF_LISTEN | TCPF_CLOSE))
314 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
315 tp->ext_header_len = opt->opt_flen + opt->opt_nflen;
316 tcp_sync_mss(sk, tp->pmtu_cookie);
317 }
318 }
319 opt = xchg(&np->opt, opt);
320 sk_dst_reset(sk);
321 } else {
322 write_lock(&sk->sk_dst_lock);
323 opt = xchg(&np->opt, opt);
324 write_unlock(&sk->sk_dst_lock);
325 sk_dst_reset(sk);
326 }
327sticky_done:
328 if (opt)
329 sock_kfree_s(sk, opt, opt->tot_len);
330 break;
331 }
332
333 case IPV6_2292PKTOPTIONS:
1da177e4
LT		 334 {
335 struct ipv6_txoptions *opt = NULL;
336 struct msghdr msg;
337 struct flowi fl;
338 int junk;
339
340 fl.fl6_flowlabel = 0;
341 fl.oif = sk->sk_bound_dev_if;
342
343 if (optlen == 0)
344 goto update;
345
346 /* 1K is probably excessive
347 * 1K is surely not enough, 2K per standard header is 16K.
348 */
349 retv = -EINVAL;
350 if (optlen > 64*1024)
351 break;
352
353 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
354 retv = -ENOBUFS;
355 if (opt == NULL)
356 break;
357
358 memset(opt, 0, sizeof(*opt));
359 opt->tot_len = sizeof(*opt) + optlen;
360 retv = -EFAULT;
361 if (copy_from_user(opt+1, optval, optlen))
362 goto done;
363
364 msg.msg_controllen = optlen;
365 msg.msg_control = (void*)(opt+1);
366
367 retv = datagram_send_ctl(&msg, &fl, opt, &junk);
368 if (retv)
369 goto done;
370update:
371 retv = 0;
372 if (sk->sk_type == SOCK_STREAM) {
373 if (opt) {
374 struct tcp_sock *tp = tcp_sk(sk);
375 if (!((1 << sk->sk_state) &
376 (TCPF_LISTEN | TCPF_CLOSE))
377 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
378 tp->ext_header_len = opt->opt_flen + opt->opt_nflen;
379 tcp_sync_mss(sk, tp->pmtu_cookie);
380 }
381 }
382 opt = xchg(&np->opt, opt);
383 sk_dst_reset(sk);
384 } else {
385 write_lock(&sk->sk_dst_lock);
386 opt = xchg(&np->opt, opt);
387 write_unlock(&sk->sk_dst_lock);
388 sk_dst_reset(sk);
389 }
390
391done:
392 if (opt)
393 sock_kfree_s(sk, opt, opt->tot_len);
394 break;
395 }
396 case IPV6_UNICAST_HOPS:
397 if (val > 255 || val < -1)
398 goto e_inval;
399 np->hop_limit = val;
400 retv = 0;
401 break;
402
403 case IPV6_MULTICAST_HOPS:
404 if (sk->sk_type == SOCK_STREAM)
405 goto e_inval;
406 if (val > 255 || val < -1)
407 goto e_inval;
408 np->mcast_hops = val;
409 retv = 0;
410 break;
411
412 case IPV6_MULTICAST_LOOP:
413 np->mc_loop = valbool;
414 retv = 0;
415 break;
416
417 case IPV6_MULTICAST_IF:
418 if (sk->sk_type == SOCK_STREAM)
419 goto e_inval;
420 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
421 goto e_inval;
422
423 if (__dev_get_by_index(val) == NULL) {
424 retv = -ENODEV;
425 break;
426 }
427 np->mcast_oif = val;
428 retv = 0;
429 break;
430 case IPV6_ADD_MEMBERSHIP:
431 case IPV6_DROP_MEMBERSHIP:
432 {
433 struct ipv6_mreq mreq;
434
435 retv = -EFAULT;
436 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
437 break;
438
439 if (optname == IPV6_ADD_MEMBERSHIP)
440 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
441 else
442 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
443 break;
444 }
445 case IPV6_JOIN_ANYCAST:
446 case IPV6_LEAVE_ANYCAST:
447 {
448 struct ipv6_mreq mreq;
449
450 if (optlen != sizeof(struct ipv6_mreq))
451 goto e_inval;
452
453 retv = -EFAULT;
454 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
455 break;
456
457 if (optname == IPV6_JOIN_ANYCAST)
458 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
459 else
460 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
461 break;
462 }
463 case MCAST_JOIN_GROUP:
464 case MCAST_LEAVE_GROUP:
465 {
466 struct group_req greq;
467 struct sockaddr_in6 *psin6;
468
469 retv = -EFAULT;
470 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
471 break;
472 if (greq.gr_group.ss_family != AF_INET6) {
473 retv = -EADDRNOTAVAIL;
474 break;
475 }
476 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
477 if (optname == MCAST_JOIN_GROUP)
478 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
479 &psin6->sin6_addr);
480 else
481 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
482 &psin6->sin6_addr);
483 break;
484 }
485 case MCAST_JOIN_SOURCE_GROUP:
486 case MCAST_LEAVE_SOURCE_GROUP:
487 case MCAST_BLOCK_SOURCE:
488 case MCAST_UNBLOCK_SOURCE:
489 {
490 struct group_source_req greqs;
491 int omode, add;
492
493 if (optlen != sizeof(struct group_source_req))
494 goto e_inval;
495 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
496 retv = -EFAULT;
497 break;
498 }
499 if (greqs.gsr_group.ss_family != AF_INET6 ||
500 greqs.gsr_source.ss_family != AF_INET6) {
501 retv = -EADDRNOTAVAIL;
502 break;
503 }
504 if (optname == MCAST_BLOCK_SOURCE) {
505 omode = MCAST_EXCLUDE;
506 add = 1;
507 } else if (optname == MCAST_UNBLOCK_SOURCE) {
508 omode = MCAST_EXCLUDE;
509 add = 0;
510 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
511 struct sockaddr_in6 *psin6;
512
513 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
514 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
515 &psin6->sin6_addr);
c9e3e8b6
DS		 516 /* prior join w/ different source is ok */
517 if (retv && retv != -EADDRINUSE)
1da177e4
LT		 518 break;
519 omode = MCAST_INCLUDE;
520 add = 1;
c9e3e8b6 521 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
1da177e4
LT		 522 omode = MCAST_INCLUDE;
523 add = 0;
524 }
525 retv = ip6_mc_source(add, omode, sk, &greqs);
526 break;
527 }
528 case MCAST_MSFILTER:
529 {
1da177e4
LT		 530 extern int sysctl_mld_max_msf;
531 struct group_filter *gsf;
532
533 if (optlen < GROUP_FILTER_SIZE(0))
534 goto e_inval;
535 if (optlen > sysctl_optmem_max) {
536 retv = -ENOBUFS;
537 break;
538 }
539 gsf = (struct group_filter *)kmalloc(optlen,GFP_KERNEL);
540 if (gsf == 0) {
541 retv = -ENOBUFS;
542 break;
543 }
544 retv = -EFAULT;
545 if (copy_from_user(gsf, optval, optlen)) {
546 kfree(gsf);
547 break;
548 }
549 /* numsrc >= (4G-140)/128 overflow in 32 bits */
550 if (gsf->gf_numsrc >= 0x1ffffffU ||
551 gsf->gf_numsrc > sysctl_mld_max_msf) {
552 kfree(gsf);
553 retv = -ENOBUFS;
554 break;
555 }
556 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
557 kfree(gsf);
558 retv = -EINVAL;
559 break;
560 }
561 retv = ip6_mc_msfilter(sk, gsf);
562 kfree(gsf);
563
564 break;
565 }
566 case IPV6_ROUTER_ALERT:
567 retv = ip6_ra_control(sk, val, NULL);
568 break;
569 case IPV6_MTU_DISCOVER:
570 if (val<0 || val>2)
571 goto e_inval;
572 np->pmtudisc = val;
573 retv = 0;
574 break;
575 case IPV6_MTU:
576 if (val && val < IPV6_MIN_MTU)
577 goto e_inval;
578 np->frag_size = val;
579 retv = 0;
580 break;
581 case IPV6_RECVERR:
582 np->recverr = valbool;
583 if (!val)
584 skb_queue_purge(&sk->sk_error_queue);
585 retv = 0;
586 break;
587 case IPV6_FLOWINFO_SEND:
588 np->sndflow = valbool;
589 retv = 0;
590 break;
591 case IPV6_FLOWLABEL_MGR:
592 retv = ipv6_flowlabel_opt(sk, optval, optlen);
593 break;
594 case IPV6_IPSEC_POLICY:
595 case IPV6_XFRM_POLICY:
6fc0b4a7
HX		 596 retv = -EPERM;
597 if (!capable(CAP_NET_ADMIN))
598 break;
1da177e4
LT		 599 retv = xfrm_user_policy(sk, optname, optval, optlen);
600 break;
601
602#ifdef CONFIG_NETFILTER
603 default:
604 retv = nf_setsockopt(sk, PF_INET6, optname, optval,
605 optlen);
606 break;
607#endif
608
609 }
610 release_sock(sk);
611
612out:
613 return retv;
614
615e_inval:
616 release_sock(sk);
617 return -EINVAL;
618}
619
333fad53
YH		 620int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_opt_hdr *hdr,
621 char __user *optval, int len)
622{
623 if (!hdr)
624 return 0;
625 len = min_t(int, len, ipv6_optlen(hdr));
626 if (copy_to_user(optval, hdr, ipv6_optlen(hdr)))
627 return -EFAULT;
628 return len;
629}
630
1da177e4
LT		 631int ipv6_getsockopt(struct sock *sk, int level, int optname,
632 char __user *optval, int __user *optlen)
633{
634 struct ipv6_pinfo *np = inet6_sk(sk);
635 int len;
636 int val;
637
638 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
639 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
640 if(level!=SOL_IPV6)
641 return -ENOPROTOOPT;
642 if (get_user(len, optlen))
643 return -EFAULT;
644 switch (optname) {
645 case IPV6_ADDRFORM:
646 if (sk->sk_protocol != IPPROTO_UDP &&
647 sk->sk_protocol != IPPROTO_TCP)
648 return -EINVAL;
649 if (sk->sk_state != TCP_ESTABLISHED)
650 return -ENOTCONN;
651 val = sk->sk_family;
652 break;
653 case MCAST_MSFILTER:
654 {
655 struct group_filter gsf;
656 int err;
657
658 if (len < GROUP_FILTER_SIZE(0))
659 return -EINVAL;
660 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
661 return -EFAULT;
662 lock_sock(sk);
663 err = ip6_mc_msfget(sk, &gsf,
664 (struct group_filter __user *)optval, optlen);
665 release_sock(sk);
666 return err;
667 }
668
333fad53 669 case IPV6_2292PKTOPTIONS:
1da177e4
LT		 670 {
671 struct msghdr msg;
672 struct sk_buff *skb;
673
674 if (sk->sk_type != SOCK_STREAM)
675 return -ENOPROTOOPT;
676
677 msg.msg_control = optval;
678 msg.msg_controllen = len;
679 msg.msg_flags = 0;
680
681 lock_sock(sk);
682 skb = np->pktoptions;
683 if (skb)
684 atomic_inc(&skb->users);
685 release_sock(sk);
686
687 if (skb) {
688 int err = datagram_recv_ctl(sk, &msg, skb);
689 kfree_skb(skb);
690 if (err)
691 return err;
692 } else {
693 if (np->rxopt.bits.rxinfo) {
694 struct in6_pktinfo src_info;
695 src_info.ipi6_ifindex = np->mcast_oif;
696 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
697 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
698 }
699 if (np->rxopt.bits.rxhlim) {
700 int hlim = np->mcast_hops;
701 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
702 }
333fad53
YH		 703 if (np->rxopt.bits.rxoinfo) {
704 struct in6_pktinfo src_info;
705 src_info.ipi6_ifindex = np->mcast_oif;
706 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
707 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
708 }
709 if (np->rxopt.bits.rxohlim) {
710 int hlim = np->mcast_hops;
711 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
712 }
1da177e4
LT		 713 }
714 len -= msg.msg_controllen;
715 return put_user(len, optlen);
716 }
717 case IPV6_MTU:
718 {
719 struct dst_entry *dst;
720 val = 0;
721 lock_sock(sk);
722 dst = sk_dst_get(sk);
723 if (dst) {
724 val = dst_mtu(dst);
725 dst_release(dst);
726 }
727 release_sock(sk);
728 if (!val)
729 return -ENOTCONN;
730 break;
731 }
732
733 case IPV6_V6ONLY:
734 val = np->ipv6only;
735 break;
736
333fad53 737 case IPV6_RECVPKTINFO:
1da177e4
LT		 738 val = np->rxopt.bits.rxinfo;
739 break;
740
333fad53
YH		 741 case IPV6_2292PKTINFO:
742 val = np->rxopt.bits.rxoinfo;
743 break;
744
745 case IPV6_RECVHOPLIMIT:
1da177e4
LT		 746 val = np->rxopt.bits.rxhlim;
747 break;
748
333fad53
YH		 749 case IPV6_2292HOPLIMIT:
750 val = np->rxopt.bits.rxohlim;
751 break;
752
753 case IPV6_RECVRTHDR:
1da177e4
LT		 754 val = np->rxopt.bits.srcrt;
755 break;
756
333fad53
YH		 757 case IPV6_2292RTHDR:
758 val = np->rxopt.bits.osrcrt;
759 break;
760
1da177e4 761 case IPV6_HOPOPTS:
333fad53
YH		 762 case IPV6_RTHDRDSTOPTS:
763 case IPV6_RTHDR:
764 case IPV6_DSTOPTS:
765 {
766
767 lock_sock(sk);
768 len = ipv6_getsockopt_sticky(sk, np->opt->hopopt,
769 optval, len);
770 release_sock(sk);
771 return put_user(len, optlen);
772 }
773
774 case IPV6_RECVHOPOPTS:
1da177e4
LT		 775 val = np->rxopt.bits.hopopts;
776 break;
777
333fad53
YH		 778 case IPV6_2292HOPOPTS:
779 val = np->rxopt.bits.ohopopts;
780 break;
781
782 case IPV6_RECVDSTOPTS:
1da177e4
LT		 783 val = np->rxopt.bits.dstopts;
784 break;
785
333fad53
YH		 786 case IPV6_2292DSTOPTS:
787 val = np->rxopt.bits.odstopts;
788 break;
789
1da177e4
LT		 790 case IPV6_FLOWINFO:
791 val = np->rxopt.bits.rxflow;
792 break;
793
794 case IPV6_UNICAST_HOPS:
795 val = np->hop_limit;
796 break;
797
798 case IPV6_MULTICAST_HOPS:
799 val = np->mcast_hops;
800 break;
801
802 case IPV6_MULTICAST_LOOP:
803 val = np->mc_loop;
804 break;
805
806 case IPV6_MULTICAST_IF:
807 val = np->mcast_oif;
808 break;
809
810 case IPV6_MTU_DISCOVER:
811 val = np->pmtudisc;
812 break;
813
814 case IPV6_RECVERR:
815 val = np->recverr;
816 break;
817
818 case IPV6_FLOWINFO_SEND:
819 val = np->sndflow;
820 break;
821
822 default:
823#ifdef CONFIG_NETFILTER
824 lock_sock(sk);
825 val = nf_getsockopt(sk, PF_INET6, optname, optval,
826 &len);
827 release_sock(sk);
828 if (val >= 0)
829 val = put_user(len, optlen);
830 return val;
831#else
832 return -EINVAL;
833#endif
834 }
835 len = min_t(unsigned int, sizeof(int), len);
836 if(put_user(len, optlen))
837 return -EFAULT;
838 if(copy_to_user(optval,&val,len))
839 return -EFAULT;
840 return 0;
841}
842
843void __init ipv6_packet_init(void)
844{
845 dev_add_pack(&ipv6_packet_type);
846}
847
848void ipv6_packet_cleanup(void)
849{
850 dev_remove_pack(&ipv6_packet_type);
851}
Michael's Linux tree.