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[PATCH] libata irq-pio: merge the ata_dataout_task workqueue with ata_pio_task workqueue
[pv_ops_mirror.git] / net / ipv6 / ipv6_sockglue.c
blob003fd99ff597d6f4332008c90f6bdcb2b9e80493
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
58 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly;
59
60 static struct packet_type ipv6_packet_type = {
61 .type = __constant_htons(ETH_P_IPV6),
62 .func = ipv6_rcv,
63 };
64
65 struct ip6_ra_chain *ip6_ra_chain;
66 DEFINE_RWLOCK(ip6_ra_lock);
67
68 int 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 kfree(new_ra);
84 return -EADDRINUSE;
85 }
86
87 *rap = ra->next;
88 write_unlock_bh(&ip6_ra_lock);
89
90 if (ra->destructor)
91 ra->destructor(sk);
92 sock_put(sk);
93 kfree(ra);
94 return 0;
95 }
96 }
97 if (new_ra == NULL) {
98 write_unlock_bh(&ip6_ra_lock);
99 return -ENOBUFS;
100 }
101 new_ra->sk = sk;
102 new_ra->sel = sel;
103 new_ra->destructor = destructor;
104 new_ra->next = ra;
105 *rap = new_ra;
106 sock_hold(sk);
107 write_unlock_bh(&ip6_ra_lock);
108 return 0;
109 }
110
111 int ipv6_setsockopt(struct sock *sk, int level, int optname,
112 char __user *optval, int optlen)
113 {
114 struct ipv6_pinfo *np = inet6_sk(sk);
115 int val, valbool;
116 int retv = -ENOPROTOOPT;
117
118 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
119 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
120
121 if(level!=SOL_IPV6)
122 goto out;
123
124 if (optval == NULL)
125 val=0;
126 else if (get_user(val, (int __user *) optval))
127 return -EFAULT;
128
129 valbool = (val!=0);
130
131 lock_sock(sk);
132
133 switch (optname) {
134
135 case IPV6_ADDRFORM:
136 if (val == PF_INET) {
137 struct ipv6_txoptions *opt;
138 struct sk_buff *pktopt;
139
140 if (sk->sk_protocol != IPPROTO_UDP &&
141 sk->sk_protocol != IPPROTO_TCP)
142 break;
143
144 if (sk->sk_state != TCP_ESTABLISHED) {
145 retv = -ENOTCONN;
146 break;
147 }
148
149 if (ipv6_only_sock(sk) ||
150 !(ipv6_addr_type(&np->daddr) & IPV6_ADDR_MAPPED)) {
151 retv = -EADDRNOTAVAIL;
152 break;
153 }
154
155 fl6_free_socklist(sk);
156 ipv6_sock_mc_close(sk);
157
158 /*
159 * Sock is moving from IPv6 to IPv4 (sk_prot), so
160 * remove it from the refcnt debug socks count in the
161 * original family...
162 */
163 sk_refcnt_debug_dec(sk);
164
165 if (sk->sk_protocol == IPPROTO_TCP) {
166 struct tcp_sock *tp = tcp_sk(sk);
167
168 local_bh_disable();
169 sock_prot_dec_use(sk->sk_prot);
170 sock_prot_inc_use(&tcp_prot);
171 local_bh_enable();
172 sk->sk_prot = &tcp_prot;
173 tp->af_specific = &ipv4_specific;
174 sk->sk_socket->ops = &inet_stream_ops;
175 sk->sk_family = PF_INET;
176 tcp_sync_mss(sk, tp->pmtu_cookie);
177 } else {
178 local_bh_disable();
179 sock_prot_dec_use(sk->sk_prot);
180 sock_prot_inc_use(&udp_prot);
181 local_bh_enable();
182 sk->sk_prot = &udp_prot;
183 sk->sk_socket->ops = &inet_dgram_ops;
184 sk->sk_family = PF_INET;
185 }
186 opt = xchg(&np->opt, NULL);
187 if (opt)
188 sock_kfree_s(sk, opt, opt->tot_len);
189 pktopt = xchg(&np->pktoptions, NULL);
190 if (pktopt)
191 kfree_skb(pktopt);
192
193 sk->sk_destruct = inet_sock_destruct;
194 /*
195 * ... and add it to the refcnt debug socks count
196 * in the new family. -acme
197 */
198 sk_refcnt_debug_inc(sk);
199 module_put(THIS_MODULE);
200 retv = 0;
201 break;
202 }
203 goto e_inval;
204
205 case IPV6_V6ONLY:
206 if (inet_sk(sk)->num)
207 goto e_inval;
208 np->ipv6only = valbool;
209 retv = 0;
210 break;
211
212 case IPV6_RECVPKTINFO:
213 np->rxopt.bits.rxinfo = valbool;
214 retv = 0;
215 break;
216
217 case IPV6_2292PKTINFO:
218 np->rxopt.bits.rxoinfo = valbool;
219 retv = 0;
220 break;
221
222 case IPV6_RECVHOPLIMIT:
223 np->rxopt.bits.rxhlim = valbool;
224 retv = 0;
225 break;
226
227 case IPV6_2292HOPLIMIT:
228 np->rxopt.bits.rxohlim = valbool;
229 retv = 0;
230 break;
231
232 case IPV6_RECVRTHDR:
233 if (val < 0 || val > 2)
234 goto e_inval;
235 np->rxopt.bits.srcrt = val;
236 retv = 0;
237 break;
238
239 case IPV6_2292RTHDR:
240 if (val < 0 || val > 2)
241 goto e_inval;
242 np->rxopt.bits.osrcrt = val;
243 retv = 0;
244 break;
245
246 case IPV6_RECVHOPOPTS:
247 np->rxopt.bits.hopopts = valbool;
248 retv = 0;
249 break;
250
251 case IPV6_2292HOPOPTS:
252 np->rxopt.bits.ohopopts = valbool;
253 retv = 0;
254 break;
255
256 case IPV6_RECVDSTOPTS:
257 np->rxopt.bits.dstopts = valbool;
258 retv = 0;
259 break;
260
261 case IPV6_2292DSTOPTS:
262 np->rxopt.bits.odstopts = valbool;
263 retv = 0;
264 break;
265
266 case IPV6_TCLASS:
267 if (val < 0 || val > 0xff)
268 goto e_inval;
269 np->tclass = val;
270 retv = 0;
271 break;
272
273 case IPV6_RECVTCLASS:
274 np->rxopt.bits.rxtclass = valbool;
275 retv = 0;
276 break;
277
278 case IPV6_FLOWINFO:
279 np->rxopt.bits.rxflow = valbool;
280 retv = 0;
281 break;
282
283 case IPV6_HOPOPTS:
284 case IPV6_RTHDRDSTOPTS:
285 case IPV6_RTHDR:
286 case IPV6_DSTOPTS:
287 {
288 struct ipv6_txoptions *opt;
289 if (optlen == 0)
290 optval = 0;
291
292 /* hop-by-hop / destination options are privileged option */
293 retv = -EPERM;
294 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
295 break;
296
297 retv = -EINVAL;
298 if (optlen & 0x7 || optlen > 8 * 255)
299 break;
300
301 opt = ipv6_renew_options(sk, np->opt, optname,
302 (struct ipv6_opt_hdr __user *)optval,
303 optlen);
304 if (IS_ERR(opt)) {
305 retv = PTR_ERR(opt);
306 break;
307 }
308
309 /* routing header option needs extra check */
310 if (optname == IPV6_RTHDR && opt->srcrt) {
311 struct ipv6_rt_hdr *rthdr = opt->srcrt;
312 if (rthdr->type)
313 goto sticky_done;
314 if ((rthdr->hdrlen & 1) ||
315 (rthdr->hdrlen >> 1) != rthdr->segments_left)
316 goto sticky_done;
317 }
318
319 retv = 0;
320 if (sk->sk_type == SOCK_STREAM) {
321 if (opt) {
322 struct tcp_sock *tp = tcp_sk(sk);
323 if (!((1 << sk->sk_state) &
324 (TCPF_LISTEN | TCPF_CLOSE))
325 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
326 tp->ext_header_len = opt->opt_flen + opt->opt_nflen;
327 tcp_sync_mss(sk, tp->pmtu_cookie);
328 }
329 }
330 opt = xchg(&np->opt, opt);
331 sk_dst_reset(sk);
332 } else {
333 write_lock(&sk->sk_dst_lock);
334 opt = xchg(&np->opt, opt);
335 write_unlock(&sk->sk_dst_lock);
336 sk_dst_reset(sk);
337 }
338 sticky_done:
339 if (opt)
340 sock_kfree_s(sk, opt, opt->tot_len);
341 break;
342 }
343
344 case IPV6_2292PKTOPTIONS:
345 {
346 struct ipv6_txoptions *opt = NULL;
347 struct msghdr msg;
348 struct flowi fl;
349 int junk;
350
351 fl.fl6_flowlabel = 0;
352 fl.oif = sk->sk_bound_dev_if;
353
354 if (optlen == 0)
355 goto update;
356
357 /* 1K is probably excessive
358 * 1K is surely not enough, 2K per standard header is 16K.
359 */
360 retv = -EINVAL;
361 if (optlen > 64*1024)
362 break;
363
364 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
365 retv = -ENOBUFS;
366 if (opt == NULL)
367 break;
368
369 memset(opt, 0, sizeof(*opt));
370 opt->tot_len = sizeof(*opt) + optlen;
371 retv = -EFAULT;
372 if (copy_from_user(opt+1, optval, optlen))
373 goto done;
374
375 msg.msg_controllen = optlen;
376 msg.msg_control = (void*)(opt+1);
377
378 retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk);
379 if (retv)
380 goto done;
381 update:
382 retv = 0;
383 if (sk->sk_type == SOCK_STREAM) {
384 if (opt) {
385 struct tcp_sock *tp = tcp_sk(sk);
386 if (!((1 << sk->sk_state) &
387 (TCPF_LISTEN | TCPF_CLOSE))
388 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
389 tp->ext_header_len = opt->opt_flen + opt->opt_nflen;
390 tcp_sync_mss(sk, tp->pmtu_cookie);
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
402 done:
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;
431 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
432 goto e_inval;
433
434 if (__dev_get_by_index(val) == NULL) {
435 retv = -ENODEV;
436 break;
437 }
438 np->mcast_oif = val;
439 retv = 0;
440 break;
441 case IPV6_ADD_MEMBERSHIP:
442 case IPV6_DROP_MEMBERSHIP:
443 {
444 struct ipv6_mreq mreq;
445
446 retv = -EFAULT;
447 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
448 break;
449
450 if (optname == IPV6_ADD_MEMBERSHIP)
451 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
452 else
453 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
454 break;
455 }
456 case IPV6_JOIN_ANYCAST:
457 case IPV6_LEAVE_ANYCAST:
458 {
459 struct ipv6_mreq mreq;
460
461 if (optlen != sizeof(struct ipv6_mreq))
462 goto e_inval;
463
464 retv = -EFAULT;
465 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
466 break;
467
468 if (optname == IPV6_JOIN_ANYCAST)
469 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
470 else
471 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
472 break;
473 }
474 case MCAST_JOIN_GROUP:
475 case MCAST_LEAVE_GROUP:
476 {
477 struct group_req greq;
478 struct sockaddr_in6 *psin6;
479
480 retv = -EFAULT;
481 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
482 break;
483 if (greq.gr_group.ss_family != AF_INET6) {
484 retv = -EADDRNOTAVAIL;
485 break;
486 }
487 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
488 if (optname == MCAST_JOIN_GROUP)
489 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
490 &psin6->sin6_addr);
491 else
492 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
493 &psin6->sin6_addr);
494 break;
495 }
496 case MCAST_JOIN_SOURCE_GROUP:
497 case MCAST_LEAVE_SOURCE_GROUP:
498 case MCAST_BLOCK_SOURCE:
499 case MCAST_UNBLOCK_SOURCE:
500 {
501 struct group_source_req greqs;
502 int omode, add;
503
504 if (optlen != sizeof(struct group_source_req))
505 goto e_inval;
506 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
507 retv = -EFAULT;
508 break;
509 }
510 if (greqs.gsr_group.ss_family != AF_INET6 ||
511 greqs.gsr_source.ss_family != AF_INET6) {
512 retv = -EADDRNOTAVAIL;
513 break;
514 }
515 if (optname == MCAST_BLOCK_SOURCE) {
516 omode = MCAST_EXCLUDE;
517 add = 1;
518 } else if (optname == MCAST_UNBLOCK_SOURCE) {
519 omode = MCAST_EXCLUDE;
520 add = 0;
521 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
522 struct sockaddr_in6 *psin6;
523
524 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
525 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
526 &psin6->sin6_addr);
527 /* prior join w/ different source is ok */
528 if (retv && retv != -EADDRINUSE)
529 break;
530 omode = MCAST_INCLUDE;
531 add = 1;
532 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
533 omode = MCAST_INCLUDE;
534 add = 0;
535 }
536 retv = ip6_mc_source(add, omode, sk, &greqs);
537 break;
538 }
539 case MCAST_MSFILTER:
540 {
541 extern int sysctl_mld_max_msf;
542 struct group_filter *gsf;
543
544 if (optlen < GROUP_FILTER_SIZE(0))
545 goto e_inval;
546 if (optlen > sysctl_optmem_max) {
547 retv = -ENOBUFS;
548 break;
549 }
550 gsf = (struct group_filter *)kmalloc(optlen,GFP_KERNEL);
551 if (gsf == 0) {
552 retv = -ENOBUFS;
553 break;
554 }
555 retv = -EFAULT;
556 if (copy_from_user(gsf, optval, optlen)) {
557 kfree(gsf);
558 break;
559 }
560 /* numsrc >= (4G-140)/128 overflow in 32 bits */
561 if (gsf->gf_numsrc >= 0x1ffffffU ||
562 gsf->gf_numsrc > sysctl_mld_max_msf) {
563 kfree(gsf);
564 retv = -ENOBUFS;
565 break;
566 }
567 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
568 kfree(gsf);
569 retv = -EINVAL;
570 break;
571 }
572 retv = ip6_mc_msfilter(sk, gsf);
573 kfree(gsf);
574
575 break;
576 }
577 case IPV6_ROUTER_ALERT:
578 retv = ip6_ra_control(sk, val, NULL);
579 break;
580 case IPV6_MTU_DISCOVER:
581 if (val<0 || val>2)
582 goto e_inval;
583 np->pmtudisc = val;
584 retv = 0;
585 break;
586 case IPV6_MTU:
587 if (val && val < IPV6_MIN_MTU)
588 goto e_inval;
589 np->frag_size = val;
590 retv = 0;
591 break;
592 case IPV6_RECVERR:
593 np->recverr = valbool;
594 if (!val)
595 skb_queue_purge(&sk->sk_error_queue);
596 retv = 0;
597 break;
598 case IPV6_FLOWINFO_SEND:
599 np->sndflow = valbool;
600 retv = 0;
601 break;
602 case IPV6_FLOWLABEL_MGR:
603 retv = ipv6_flowlabel_opt(sk, optval, optlen);
604 break;
605 case IPV6_IPSEC_POLICY:
606 case IPV6_XFRM_POLICY:
607 retv = -EPERM;
608 if (!capable(CAP_NET_ADMIN))
609 break;
610 retv = xfrm_user_policy(sk, optname, optval, optlen);
611 break;
612
613 #ifdef CONFIG_NETFILTER
614 default:
615 retv = nf_setsockopt(sk, PF_INET6, optname, optval,
616 optlen);
617 break;
618 #endif
619
620 }
621 release_sock(sk);
622
623 out:
624 return retv;
625
626 e_inval:
627 release_sock(sk);
628 return -EINVAL;
629 }
630
631 int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_opt_hdr *hdr,
632 char __user *optval, int len)
633 {
634 if (!hdr)
635 return 0;
636 len = min_t(int, len, ipv6_optlen(hdr));
637 if (copy_to_user(optval, hdr, ipv6_optlen(hdr)))
638 return -EFAULT;
639 return len;
640 }
641
642 int ipv6_getsockopt(struct sock *sk, int level, int optname,
643 char __user *optval, int __user *optlen)
644 {
645 struct ipv6_pinfo *np = inet6_sk(sk);
646 int len;
647 int val;
648
649 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
650 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
651 if(level!=SOL_IPV6)
652 return -ENOPROTOOPT;
653 if (get_user(len, optlen))
654 return -EFAULT;
655 switch (optname) {
656 case IPV6_ADDRFORM:
657 if (sk->sk_protocol != IPPROTO_UDP &&
658 sk->sk_protocol != IPPROTO_TCP)
659 return -EINVAL;
660 if (sk->sk_state != TCP_ESTABLISHED)
661 return -ENOTCONN;
662 val = sk->sk_family;
663 break;
664 case MCAST_MSFILTER:
665 {
666 struct group_filter gsf;
667 int err;
668
669 if (len < GROUP_FILTER_SIZE(0))
670 return -EINVAL;
671 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
672 return -EFAULT;
673 lock_sock(sk);
674 err = ip6_mc_msfget(sk, &gsf,
675 (struct group_filter __user *)optval, optlen);
676 release_sock(sk);
677 return err;
678 }
679
680 case IPV6_2292PKTOPTIONS:
681 {
682 struct msghdr msg;
683 struct sk_buff *skb;
684
685 if (sk->sk_type != SOCK_STREAM)
686 return -ENOPROTOOPT;
687
688 msg.msg_control = optval;
689 msg.msg_controllen = len;
690 msg.msg_flags = 0;
691
692 lock_sock(sk);
693 skb = np->pktoptions;
694 if (skb)
695 atomic_inc(&skb->users);
696 release_sock(sk);
697
698 if (skb) {
699 int err = datagram_recv_ctl(sk, &msg, skb);
700 kfree_skb(skb);
701 if (err)
702 return err;
703 } else {
704 if (np->rxopt.bits.rxinfo) {
705 struct in6_pktinfo src_info;
706 src_info.ipi6_ifindex = np->mcast_oif;
707 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
708 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
709 }
710 if (np->rxopt.bits.rxhlim) {
711 int hlim = np->mcast_hops;
712 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
713 }
714 if (np->rxopt.bits.rxoinfo) {
715 struct in6_pktinfo src_info;
716 src_info.ipi6_ifindex = np->mcast_oif;
717 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
718 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
719 }
720 if (np->rxopt.bits.rxohlim) {
721 int hlim = np->mcast_hops;
722 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
723 }
724 }
725 len -= msg.msg_controllen;
726 return put_user(len, optlen);
727 }
728 case IPV6_MTU:
729 {
730 struct dst_entry *dst;
731 val = 0;
732 lock_sock(sk);
733 dst = sk_dst_get(sk);
734 if (dst) {
735 val = dst_mtu(dst);
736 dst_release(dst);
737 }
738 release_sock(sk);
739 if (!val)
740 return -ENOTCONN;
741 break;
742 }
743
744 case IPV6_V6ONLY:
745 val = np->ipv6only;
746 break;
747
748 case IPV6_RECVPKTINFO:
749 val = np->rxopt.bits.rxinfo;
750 break;
751
752 case IPV6_2292PKTINFO:
753 val = np->rxopt.bits.rxoinfo;
754 break;
755
756 case IPV6_RECVHOPLIMIT:
757 val = np->rxopt.bits.rxhlim;
758 break;
759
760 case IPV6_2292HOPLIMIT:
761 val = np->rxopt.bits.rxohlim;
762 break;
763
764 case IPV6_RECVRTHDR:
765 val = np->rxopt.bits.srcrt;
766 break;
767
768 case IPV6_2292RTHDR:
769 val = np->rxopt.bits.osrcrt;
770 break;
771
772 case IPV6_HOPOPTS:
773 case IPV6_RTHDRDSTOPTS:
774 case IPV6_RTHDR:
775 case IPV6_DSTOPTS:
776 {
777
778 lock_sock(sk);
779 len = ipv6_getsockopt_sticky(sk, np->opt->hopopt,
780 optval, len);
781 release_sock(sk);
782 return put_user(len, optlen);
783 }
784
785 case IPV6_RECVHOPOPTS:
786 val = np->rxopt.bits.hopopts;
787 break;
788
789 case IPV6_2292HOPOPTS:
790 val = np->rxopt.bits.ohopopts;
791 break;
792
793 case IPV6_RECVDSTOPTS:
794 val = np->rxopt.bits.dstopts;
795 break;
796
797 case IPV6_2292DSTOPTS:
798 val = np->rxopt.bits.odstopts;
799 break;
800
801 case IPV6_TCLASS:
802 val = np->tclass;
803 break;
804
805 case IPV6_RECVTCLASS:
806 val = np->rxopt.bits.rxtclass;
807 break;
808
809 case IPV6_FLOWINFO:
810 val = np->rxopt.bits.rxflow;
811 break;
812
813 case IPV6_UNICAST_HOPS:
814 val = np->hop_limit;
815 break;
816
817 case IPV6_MULTICAST_HOPS:
818 val = np->mcast_hops;
819 break;
820
821 case IPV6_MULTICAST_LOOP:
822 val = np->mc_loop;
823 break;
824
825 case IPV6_MULTICAST_IF:
826 val = np->mcast_oif;
827 break;
828
829 case IPV6_MTU_DISCOVER:
830 val = np->pmtudisc;
831 break;
832
833 case IPV6_RECVERR:
834 val = np->recverr;
835 break;
836
837 case IPV6_FLOWINFO_SEND:
838 val = np->sndflow;
839 break;
840
841 default:
842 #ifdef CONFIG_NETFILTER
843 lock_sock(sk);
844 val = nf_getsockopt(sk, PF_INET6, optname, optval,
845 &len);
846 release_sock(sk);
847 if (val >= 0)
848 val = put_user(len, optlen);
849 return val;
850 #else
851 return -EINVAL;
852 #endif
853 }
854 len = min_t(unsigned int, sizeof(int), len);
855 if(put_user(len, optlen))
856 return -EFAULT;
857 if(copy_to_user(optval,&val,len))
858 return -EFAULT;
859 return 0;
860 }
861
862 void __init ipv6_packet_init(void)
863 {
864 dev_add_pack(&ipv6_packet_type);
865 }
866
867 void ipv6_packet_cleanup(void)
868 {
869 dev_remove_pack(&ipv6_packet_type);
870 }
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