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[PATCH] capable/capability.h (net/)
[net-next-2.6.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>
4fc268d2 29#include <linux/capability.h>
1da177e4
LT		 30#include <linux/config.h>
31#include <linux/errno.h>
32#include <linux/types.h>
33#include <linux/socket.h>
34#include <linux/sockios.h>
35#include <linux/sched.h>
36#include <linux/net.h>
37#include <linux/in6.h>
38#include <linux/netdevice.h>
39#include <linux/if_arp.h>
40#include <linux/init.h>
41#include <linux/sysctl.h>
42#include <linux/netfilter.h>
43
44#include <net/sock.h>
45#include <net/snmp.h>
46#include <net/ipv6.h>
47#include <net/ndisc.h>
48#include <net/protocol.h>
49#include <net/transp_v6.h>
50#include <net/ip6_route.h>
51#include <net/addrconf.h>
52#include <net/inet_common.h>
53#include <net/tcp.h>
54#include <net/udp.h>
55#include <net/xfrm.h>
56
57#include <asm/uaccess.h>
58
ba89966c 59DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly;
1da177e4
LT		 60
61static struct packet_type ipv6_packet_type = {
62 .type = __constant_htons(ETH_P_IPV6),
63 .func = ipv6_rcv,
64};
65
66struct ip6_ra_chain *ip6_ra_chain;
67DEFINE_RWLOCK(ip6_ra_lock);
68
69int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *))
70{
71 struct ip6_ra_chain *ra, *new_ra, **rap;
72
73 /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
74 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW)
75 return -EINVAL;
76
77 new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
78
79 write_lock_bh(&ip6_ra_lock);
80 for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
81 if (ra->sk == sk) {
82 if (sel>=0) {
83 write_unlock_bh(&ip6_ra_lock);
a51482bd 84 kfree(new_ra);
1da177e4
LT		 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 166 if (sk->sk_protocol == IPPROTO_TCP) {
d83d8461 167 struct inet_connection_sock *icsk = inet_csk(sk);
1da177e4
LT		 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;
d83d8461 174 icsk->icsk_af_ops = &ipv4_specific;
1da177e4
LT		 175 sk->sk_socket->ops = &inet_stream_ops;
176 sk->sk_family = PF_INET;
d83d8461 177 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
1da177e4
LT		 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
41a1f8ea
YH		 267 case IPV6_TCLASS:
268 if (val < 0 || val > 0xff)
269 goto e_inval;
270 np->tclass = val;
271 retv = 0;
272 break;
273
274 case IPV6_RECVTCLASS:
275 np->rxopt.bits.rxtclass = valbool;
276 retv = 0;
277 break;
278
1da177e4
LT		 279 case IPV6_FLOWINFO:
280 np->rxopt.bits.rxflow = valbool;
281 retv = 0;
282 break;
283
333fad53
YH		 284 case IPV6_HOPOPTS:
285 case IPV6_RTHDRDSTOPTS:
286 case IPV6_RTHDR:
287 case IPV6_DSTOPTS:
288 {
289 struct ipv6_txoptions *opt;
290 if (optlen == 0)
cb422c46 291 optval = NULL;
333fad53
YH		 292
293 /* hop-by-hop / destination options are privileged option */
294 retv = -EPERM;
295 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
296 break;
297
298 retv = -EINVAL;
299 if (optlen & 0x7 || optlen > 8 * 255)
300 break;
301
302 opt = ipv6_renew_options(sk, np->opt, optname,
303 (struct ipv6_opt_hdr __user *)optval,
304 optlen);
305 if (IS_ERR(opt)) {
306 retv = PTR_ERR(opt);
307 break;
308 }
309
310 /* routing header option needs extra check */
311 if (optname == IPV6_RTHDR && opt->srcrt) {
312 struct ipv6_rt_hdr *rthdr = opt->srcrt;
313 if (rthdr->type)
314 goto sticky_done;
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;
434 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
435 goto e_inval;
436
437 if (__dev_get_by_index(val) == NULL) {
438 retv = -ENODEV;
439 break;
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
449 retv = -EFAULT;
450 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
451 break;
452
453 if (optname == IPV6_ADD_MEMBERSHIP)
454 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
455 else
456 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
457 break;
458 }
459 case IPV6_JOIN_ANYCAST:
460 case IPV6_LEAVE_ANYCAST:
461 {
462 struct ipv6_mreq mreq;
463
464 if (optlen != sizeof(struct ipv6_mreq))
465 goto e_inval;
466
467 retv = -EFAULT;
468 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
469 break;
470
471 if (optname == IPV6_JOIN_ANYCAST)
472 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
473 else
474 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
475 break;
476 }
477 case MCAST_JOIN_GROUP:
478 case MCAST_LEAVE_GROUP:
479 {
480 struct group_req greq;
481 struct sockaddr_in6 *psin6;
482
483 retv = -EFAULT;
484 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
485 break;
486 if (greq.gr_group.ss_family != AF_INET6) {
487 retv = -EADDRNOTAVAIL;
488 break;
489 }
490 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
491 if (optname == MCAST_JOIN_GROUP)
492 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
493 &psin6->sin6_addr);
494 else
495 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
496 &psin6->sin6_addr);
497 break;
498 }
499 case MCAST_JOIN_SOURCE_GROUP:
500 case MCAST_LEAVE_SOURCE_GROUP:
501 case MCAST_BLOCK_SOURCE:
502 case MCAST_UNBLOCK_SOURCE:
503 {
504 struct group_source_req greqs;
505 int omode, add;
506
507 if (optlen != sizeof(struct group_source_req))
508 goto e_inval;
509 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
510 retv = -EFAULT;
511 break;
512 }
513 if (greqs.gsr_group.ss_family != AF_INET6 ||
514 greqs.gsr_source.ss_family != AF_INET6) {
515 retv = -EADDRNOTAVAIL;
516 break;
517 }
518 if (optname == MCAST_BLOCK_SOURCE) {
519 omode = MCAST_EXCLUDE;
520 add = 1;
521 } else if (optname == MCAST_UNBLOCK_SOURCE) {
522 omode = MCAST_EXCLUDE;
523 add = 0;
524 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
525 struct sockaddr_in6 *psin6;
526
527 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
528 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
529 &psin6->sin6_addr);
c9e3e8b6
DS		 530 /* prior join w/ different source is ok */
531 if (retv && retv != -EADDRINUSE)
1da177e4
LT		 532 break;
533 omode = MCAST_INCLUDE;
534 add = 1;
c9e3e8b6 535 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
1da177e4
LT		 536 omode = MCAST_INCLUDE;
537 add = 0;
538 }
539 retv = ip6_mc_source(add, omode, sk, &greqs);
540 break;
541 }
542 case MCAST_MSFILTER:
543 {
1da177e4
LT		 544 extern int sysctl_mld_max_msf;
545 struct group_filter *gsf;
546
547 if (optlen < GROUP_FILTER_SIZE(0))
548 goto e_inval;
549 if (optlen > sysctl_optmem_max) {
550 retv = -ENOBUFS;
551 break;
552 }
8b3a7005 553 gsf = kmalloc(optlen,GFP_KERNEL);
1da177e4
LT		 554 if (gsf == 0) {
555 retv = -ENOBUFS;
556 break;
557 }
558 retv = -EFAULT;
559 if (copy_from_user(gsf, optval, optlen)) {
560 kfree(gsf);
561 break;
562 }
563 /* numsrc >= (4G-140)/128 overflow in 32 bits */
564 if (gsf->gf_numsrc >= 0x1ffffffU ||
565 gsf->gf_numsrc > sysctl_mld_max_msf) {
566 kfree(gsf);
567 retv = -ENOBUFS;
568 break;
569 }
570 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
571 kfree(gsf);
572 retv = -EINVAL;
573 break;
574 }
575 retv = ip6_mc_msfilter(sk, gsf);
576 kfree(gsf);
577
578 break;
579 }
580 case IPV6_ROUTER_ALERT:
581 retv = ip6_ra_control(sk, val, NULL);
582 break;
583 case IPV6_MTU_DISCOVER:
584 if (val<0 || val>2)
585 goto e_inval;
586 np->pmtudisc = val;
587 retv = 0;
588 break;
589 case IPV6_MTU:
590 if (val && val < IPV6_MIN_MTU)
591 goto e_inval;
592 np->frag_size = val;
593 retv = 0;
594 break;
595 case IPV6_RECVERR:
596 np->recverr = valbool;
597 if (!val)
598 skb_queue_purge(&sk->sk_error_queue);
599 retv = 0;
600 break;
601 case IPV6_FLOWINFO_SEND:
602 np->sndflow = valbool;
603 retv = 0;
604 break;
605 case IPV6_FLOWLABEL_MGR:
606 retv = ipv6_flowlabel_opt(sk, optval, optlen);
607 break;
608 case IPV6_IPSEC_POLICY:
609 case IPV6_XFRM_POLICY:
6fc0b4a7
HX		 610 retv = -EPERM;
611 if (!capable(CAP_NET_ADMIN))
612 break;
1da177e4
LT		 613 retv = xfrm_user_policy(sk, optname, optval, optlen);
614 break;
615
616#ifdef CONFIG_NETFILTER
617 default:
618 retv = nf_setsockopt(sk, PF_INET6, optname, optval,
619 optlen);
620 break;
621#endif
622
623 }
624 release_sock(sk);
625
626out:
627 return retv;
628
629e_inval:
630 release_sock(sk);
631 return -EINVAL;
632}
633
34a0b3cd
AB		 634static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_opt_hdr *hdr,
635 char __user *optval, int len)
333fad53
YH		 636{
637 if (!hdr)
638 return 0;
639 len = min_t(int, len, ipv6_optlen(hdr));
640 if (copy_to_user(optval, hdr, ipv6_optlen(hdr)))
641 return -EFAULT;
642 return len;
643}
644
1da177e4
LT		 645int ipv6_getsockopt(struct sock *sk, int level, int optname,
646 char __user *optval, int __user *optlen)
647{
648 struct ipv6_pinfo *np = inet6_sk(sk);
649 int len;
650 int val;
651
652 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
653 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
654 if(level!=SOL_IPV6)
655 return -ENOPROTOOPT;
656 if (get_user(len, optlen))
657 return -EFAULT;
658 switch (optname) {
659 case IPV6_ADDRFORM:
660 if (sk->sk_protocol != IPPROTO_UDP &&
661 sk->sk_protocol != IPPROTO_TCP)
662 return -EINVAL;
663 if (sk->sk_state != TCP_ESTABLISHED)
664 return -ENOTCONN;
665 val = sk->sk_family;
666 break;
667 case MCAST_MSFILTER:
668 {
669 struct group_filter gsf;
670 int err;
671
672 if (len < GROUP_FILTER_SIZE(0))
673 return -EINVAL;
674 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
675 return -EFAULT;
676 lock_sock(sk);
677 err = ip6_mc_msfget(sk, &gsf,
678 (struct group_filter __user *)optval, optlen);
679 release_sock(sk);
680 return err;
681 }
682
333fad53 683 case IPV6_2292PKTOPTIONS:
1da177e4
LT		 684 {
685 struct msghdr msg;
686 struct sk_buff *skb;
687
688 if (sk->sk_type != SOCK_STREAM)
689 return -ENOPROTOOPT;
690
691 msg.msg_control = optval;
692 msg.msg_controllen = len;
693 msg.msg_flags = 0;
694
695 lock_sock(sk);
696 skb = np->pktoptions;
697 if (skb)
698 atomic_inc(&skb->users);
699 release_sock(sk);
700
701 if (skb) {
702 int err = datagram_recv_ctl(sk, &msg, skb);
703 kfree_skb(skb);
704 if (err)
705 return err;
706 } else {
707 if (np->rxopt.bits.rxinfo) {
708 struct in6_pktinfo src_info;
709 src_info.ipi6_ifindex = np->mcast_oif;
710 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
711 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
712 }
713 if (np->rxopt.bits.rxhlim) {
714 int hlim = np->mcast_hops;
715 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
716 }
333fad53
YH		 717 if (np->rxopt.bits.rxoinfo) {
718 struct in6_pktinfo src_info;
719 src_info.ipi6_ifindex = np->mcast_oif;
720 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
721 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
722 }
723 if (np->rxopt.bits.rxohlim) {
724 int hlim = np->mcast_hops;
725 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
726 }
1da177e4
LT		 727 }
728 len -= msg.msg_controllen;
729 return put_user(len, optlen);
730 }
731 case IPV6_MTU:
732 {
733 struct dst_entry *dst;
734 val = 0;
735 lock_sock(sk);
736 dst = sk_dst_get(sk);
737 if (dst) {
738 val = dst_mtu(dst);
739 dst_release(dst);
740 }
741 release_sock(sk);
742 if (!val)
743 return -ENOTCONN;
744 break;
745 }
746
747 case IPV6_V6ONLY:
748 val = np->ipv6only;
749 break;
750
333fad53 751 case IPV6_RECVPKTINFO:
1da177e4
LT		 752 val = np->rxopt.bits.rxinfo;
753 break;
754
333fad53
YH		 755 case IPV6_2292PKTINFO:
756 val = np->rxopt.bits.rxoinfo;
757 break;
758
759 case IPV6_RECVHOPLIMIT:
1da177e4
LT		 760 val = np->rxopt.bits.rxhlim;
761 break;
762
333fad53
YH		 763 case IPV6_2292HOPLIMIT:
764 val = np->rxopt.bits.rxohlim;
765 break;
766
767 case IPV6_RECVRTHDR:
1da177e4
LT		 768 val = np->rxopt.bits.srcrt;
769 break;
770
333fad53
YH		 771 case IPV6_2292RTHDR:
772 val = np->rxopt.bits.osrcrt;
773 break;
774
1da177e4 775 case IPV6_HOPOPTS:
333fad53
YH		 776 case IPV6_RTHDRDSTOPTS:
777 case IPV6_RTHDR:
778 case IPV6_DSTOPTS:
779 {
780
781 lock_sock(sk);
782 len = ipv6_getsockopt_sticky(sk, np->opt->hopopt,
783 optval, len);
784 release_sock(sk);
785 return put_user(len, optlen);
786 }
787
788 case IPV6_RECVHOPOPTS:
1da177e4
LT		 789 val = np->rxopt.bits.hopopts;
790 break;
791
333fad53
YH		 792 case IPV6_2292HOPOPTS:
793 val = np->rxopt.bits.ohopopts;
794 break;
795
796 case IPV6_RECVDSTOPTS:
1da177e4
LT		 797 val = np->rxopt.bits.dstopts;
798 break;
799
333fad53
YH		 800 case IPV6_2292DSTOPTS:
801 val = np->rxopt.bits.odstopts;
802 break;
803
41a1f8ea
YH		 804 case IPV6_TCLASS:
805 val = np->tclass;
806 break;
807
808 case IPV6_RECVTCLASS:
809 val = np->rxopt.bits.rxtclass;
810 break;
811
1da177e4
LT		 812 case IPV6_FLOWINFO:
813 val = np->rxopt.bits.rxflow;
814 break;
815
816 case IPV6_UNICAST_HOPS:
817 val = np->hop_limit;
818 break;
819
820 case IPV6_MULTICAST_HOPS:
821 val = np->mcast_hops;
822 break;
823
824 case IPV6_MULTICAST_LOOP:
825 val = np->mc_loop;
826 break;
827
828 case IPV6_MULTICAST_IF:
829 val = np->mcast_oif;
830 break;
831
832 case IPV6_MTU_DISCOVER:
833 val = np->pmtudisc;
834 break;
835
836 case IPV6_RECVERR:
837 val = np->recverr;
838 break;
839
840 case IPV6_FLOWINFO_SEND:
841 val = np->sndflow;
842 break;
843
844 default:
845#ifdef CONFIG_NETFILTER
846 lock_sock(sk);
847 val = nf_getsockopt(sk, PF_INET6, optname, optval,
848 &len);
849 release_sock(sk);
850 if (val >= 0)
851 val = put_user(len, optlen);
852 return val;
853#else
854 return -EINVAL;
855#endif
856 }
857 len = min_t(unsigned int, sizeof(int), len);
858 if(put_user(len, optlen))
859 return -EFAULT;
860 if(copy_to_user(optval,&val,len))
861 return -EFAULT;
862 return 0;
863}
864
865void __init ipv6_packet_init(void)
866{
867 dev_add_pack(&ipv6_packet_type);
868}
869
870void ipv6_packet_cleanup(void)
871{
872 dev_remove_pack(&ipv6_packet_type);
873}
Clone of davem's net-next-2.6 tree