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25#include <linux/module.h>
26#include <linux/capability.h>
27#include <linux/errno.h>
28#include <linux/types.h>
29#include <linux/socket.h>
30#include <linux/sockios.h>
31#include <linux/net.h>
32#include <linux/in6.h>
33#include <linux/mroute6.h>
34#include <linux/netdevice.h>
35#include <linux/if_arp.h>
36#include <linux/init.h>
37#include <linux/sysctl.h>
38#include <linux/netfilter.h>
39
40#include <net/sock.h>
41#include <net/snmp.h>
42#include <net/ipv6.h>
43#include <net/ndisc.h>
44#include <net/protocol.h>
45#include <net/transp_v6.h>
46#include <net/ip6_route.h>
47#include <net/addrconf.h>
48#include <net/inet_common.h>
49#include <net/tcp.h>
50#include <net/udp.h>
51#include <net/udplite.h>
52#include <net/xfrm.h>
53#include <net/compat.h>
54
55#include <asm/uaccess.h>
56
57DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly;
58
59struct ip6_ra_chain *ip6_ra_chain;
60DEFINE_RWLOCK(ip6_ra_lock);
61
62int ip6_ra_control(struct sock *sk, int sel)
63{
64 struct ip6_ra_chain *ra, *new_ra, **rap;
65
66
67 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW)
68 return -ENOPROTOOPT;
69
70 new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
71
72 write_lock_bh(&ip6_ra_lock);
73 for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
74 if (ra->sk == sk) {
75 if (sel>=0) {
76 write_unlock_bh(&ip6_ra_lock);
77 kfree(new_ra);
78 return -EADDRINUSE;
79 }
80
81 *rap = ra->next;
82 write_unlock_bh(&ip6_ra_lock);
83
84 sock_put(sk);
85 kfree(ra);
86 return 0;
87 }
88 }
89 if (new_ra == NULL) {
90 write_unlock_bh(&ip6_ra_lock);
91 return -ENOBUFS;
92 }
93 new_ra->sk = sk;
94 new_ra->sel = sel;
95 new_ra->next = ra;
96 *rap = new_ra;
97 sock_hold(sk);
98 write_unlock_bh(&ip6_ra_lock);
99 return 0;
100}
101
102static
103struct ipv6_txoptions *ipv6_update_options(struct sock *sk,
104 struct ipv6_txoptions *opt)
105{
106 if (inet_sk(sk)->is_icsk) {
107 if (opt &&
108 !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
109 inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
110 struct inet_connection_sock *icsk = inet_csk(sk);
111 icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen;
112 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
113 }
114 opt = xchg(&inet6_sk(sk)->opt, opt);
115 } else {
116 write_lock(&sk->sk_dst_lock);
117 opt = xchg(&inet6_sk(sk)->opt, opt);
118 write_unlock(&sk->sk_dst_lock);
119 }
120 sk_dst_reset(sk);
121
122 return opt;
123}
124
125static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
126 char __user *optval, unsigned int optlen)
127{
128 struct ipv6_pinfo *np = inet6_sk(sk);
129 struct net *net = sock_net(sk);
130 int val, valbool;
131 int retv = -ENOPROTOOPT;
132
133 if (optval == NULL)
134 val=0;
135 else {
136 if (optlen >= sizeof(int)) {
137 if (get_user(val, (int __user *) optval))
138 return -EFAULT;
139 } else
140 val = 0;
141 }
142
143 valbool = (val!=0);
144
145 if (ip6_mroute_opt(optname))
146 return ip6_mroute_setsockopt(sk, optname, optval, optlen);
147
148 lock_sock(sk);
149
150 switch (optname) {
151
152 case IPV6_ADDRFORM:
153 if (optlen < sizeof(int))
154 goto e_inval;
155 if (val == PF_INET) {
156 struct ipv6_txoptions *opt;
157 struct sk_buff *pktopt;
158
159 if (sk->sk_type == SOCK_RAW)
160 break;
161
162 if (sk->sk_protocol == IPPROTO_UDP ||
163 sk->sk_protocol == IPPROTO_UDPLITE) {
164 struct udp_sock *up = udp_sk(sk);
165 if (up->pending == AF_INET6) {
166 retv = -EBUSY;
167 break;
168 }
169 } else if (sk->sk_protocol != IPPROTO_TCP)
170 break;
171
172 if (sk->sk_state != TCP_ESTABLISHED) {
173 retv = -ENOTCONN;
174 break;
175 }
176
177 if (ipv6_only_sock(sk) ||
178 !ipv6_addr_v4mapped(&np->daddr)) {
179 retv = -EADDRNOTAVAIL;
180 break;
181 }
182
183 fl6_free_socklist(sk);
184 ipv6_sock_mc_close(sk);
185
186
187
188
189
190
191 sk_refcnt_debug_dec(sk);
192
193 if (sk->sk_protocol == IPPROTO_TCP) {
194 struct inet_connection_sock *icsk = inet_csk(sk);
195 local_bh_disable();
196 sock_prot_inuse_add(net, sk->sk_prot, -1);
197 sock_prot_inuse_add(net, &tcp_prot, 1);
198 local_bh_enable();
199 sk->sk_prot = &tcp_prot;
200 icsk->icsk_af_ops = &ipv4_specific;
201 sk->sk_socket->ops = &inet_stream_ops;
202 sk->sk_family = PF_INET;
203 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
204 } else {
205 struct proto *prot = &udp_prot;
206
207 if (sk->sk_protocol == IPPROTO_UDPLITE)
208 prot = &udplite_prot;
209 local_bh_disable();
210 sock_prot_inuse_add(net, sk->sk_prot, -1);
211 sock_prot_inuse_add(net, prot, 1);
212 local_bh_enable();
213 sk->sk_prot = prot;
214 sk->sk_socket->ops = &inet_dgram_ops;
215 sk->sk_family = PF_INET;
216 }
217 opt = xchg(&np->opt, NULL);
218 if (opt)
219 sock_kfree_s(sk, opt, opt->tot_len);
220 pktopt = xchg(&np->pktoptions, NULL);
221 kfree_skb(pktopt);
222
223 sk->sk_destruct = inet_sock_destruct;
224
225
226
227
228 sk_refcnt_debug_inc(sk);
229 module_put(THIS_MODULE);
230 retv = 0;
231 break;
232 }
233 goto e_inval;
234
235 case IPV6_V6ONLY:
236 if (optlen < sizeof(int) ||
237 inet_sk(sk)->num)
238 goto e_inval;
239 np->ipv6only = valbool;
240 retv = 0;
241 break;
242
243 case IPV6_RECVPKTINFO:
244 if (optlen < sizeof(int))
245 goto e_inval;
246 np->rxopt.bits.rxinfo = valbool;
247 retv = 0;
248 break;
249
250 case IPV6_2292PKTINFO:
251 if (optlen < sizeof(int))
252 goto e_inval;
253 np->rxopt.bits.rxoinfo = valbool;
254 retv = 0;
255 break;
256
257 case IPV6_RECVHOPLIMIT:
258 if (optlen < sizeof(int))
259 goto e_inval;
260 np->rxopt.bits.rxhlim = valbool;
261 retv = 0;
262 break;
263
264 case IPV6_2292HOPLIMIT:
265 if (optlen < sizeof(int))
266 goto e_inval;
267 np->rxopt.bits.rxohlim = valbool;
268 retv = 0;
269 break;
270
271 case IPV6_RECVRTHDR:
272 if (optlen < sizeof(int))
273 goto e_inval;
274 np->rxopt.bits.srcrt = valbool;
275 retv = 0;
276 break;
277
278 case IPV6_2292RTHDR:
279 if (optlen < sizeof(int))
280 goto e_inval;
281 np->rxopt.bits.osrcrt = valbool;
282 retv = 0;
283 break;
284
285 case IPV6_RECVHOPOPTS:
286 if (optlen < sizeof(int))
287 goto e_inval;
288 np->rxopt.bits.hopopts = valbool;
289 retv = 0;
290 break;
291
292 case IPV6_2292HOPOPTS:
293 if (optlen < sizeof(int))
294 goto e_inval;
295 np->rxopt.bits.ohopopts = valbool;
296 retv = 0;
297 break;
298
299 case IPV6_RECVDSTOPTS:
300 if (optlen < sizeof(int))
301 goto e_inval;
302 np->rxopt.bits.dstopts = valbool;
303 retv = 0;
304 break;
305
306 case IPV6_2292DSTOPTS:
307 if (optlen < sizeof(int))
308 goto e_inval;
309 np->rxopt.bits.odstopts = valbool;
310 retv = 0;
311 break;
312
313 case IPV6_TCLASS:
314 if (optlen < sizeof(int))
315 goto e_inval;
316 if (val < -1 || val > 0xff)
317 goto e_inval;
318
319 if (val == -1)
320 val = 0;
321 np->tclass = val;
322 retv = 0;
323 break;
324
325 case IPV6_RECVTCLASS:
326 if (optlen < sizeof(int))
327 goto e_inval;
328 np->rxopt.bits.rxtclass = valbool;
329 retv = 0;
330 break;
331
332 case IPV6_FLOWINFO:
333 if (optlen < sizeof(int))
334 goto e_inval;
335 np->rxopt.bits.rxflow = valbool;
336 retv = 0;
337 break;
338
339 case IPV6_HOPOPTS:
340 case IPV6_RTHDRDSTOPTS:
341 case IPV6_RTHDR:
342 case IPV6_DSTOPTS:
343 {
344 struct ipv6_txoptions *opt;
345
346
347
348
349 if (optlen == 0)
350 optval = NULL;
351 else if (optval == NULL)
352 goto e_inval;
353 else if (optlen < sizeof(struct ipv6_opt_hdr) ||
354 optlen & 0x7 || optlen > 8 * 255)
355 goto e_inval;
356
357
358 retv = -EPERM;
359 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
360 break;
361
362 opt = ipv6_renew_options(sk, np->opt, optname,
363 (struct ipv6_opt_hdr __user *)optval,
364 optlen);
365 if (IS_ERR(opt)) {
366 retv = PTR_ERR(opt);
367 break;
368 }
369
370
371 retv = -EINVAL;
372 if (optname == IPV6_RTHDR && opt && opt->srcrt) {
373 struct ipv6_rt_hdr *rthdr = opt->srcrt;
374 switch (rthdr->type) {
375#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
376 case IPV6_SRCRT_TYPE_2:
377 if (rthdr->hdrlen != 2 ||
378 rthdr->segments_left != 1)
379 goto sticky_done;
380
381 break;
382#endif
383 default:
384 goto sticky_done;
385 }
386 }
387
388 retv = 0;
389 opt = ipv6_update_options(sk, opt);
390sticky_done:
391 if (opt)
392 sock_kfree_s(sk, opt, opt->tot_len);
393 break;
394 }
395
396 case IPV6_PKTINFO:
397 {
398 struct in6_pktinfo pkt;
399
400 if (optlen == 0)
401 goto e_inval;
402 else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL)
403 goto e_inval;
404
405 if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) {
406 retv = -EFAULT;
407 break;
408 }
409 if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if)
410 goto e_inval;
411
412 np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex;
413 ipv6_addr_copy(&np->sticky_pktinfo.ipi6_addr, &pkt.ipi6_addr);
414 retv = 0;
415 break;
416 }
417
418 case IPV6_2292PKTOPTIONS:
419 {
420 struct ipv6_txoptions *opt = NULL;
421 struct msghdr msg;
422 struct flowi fl;
423 int junk;
424
425 fl.fl6_flowlabel = 0;
426 fl.oif = sk->sk_bound_dev_if;
427
428 if (optlen == 0)
429 goto update;
430
431
432
433
434 retv = -EINVAL;
435 if (optlen > 64*1024)
436 break;
437
438 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
439 retv = -ENOBUFS;
440 if (opt == NULL)
441 break;
442
443 memset(opt, 0, sizeof(*opt));
444 opt->tot_len = sizeof(*opt) + optlen;
445 retv = -EFAULT;
446 if (copy_from_user(opt+1, optval, optlen))
447 goto done;
448
449 msg.msg_controllen = optlen;
450 msg.msg_control = (void*)(opt+1);
451
452 retv = datagram_send_ctl(net, &msg, &fl, opt, &junk, &junk);
453 if (retv)
454 goto done;
455update:
456 retv = 0;
457 opt = ipv6_update_options(sk, opt);
458done:
459 if (opt)
460 sock_kfree_s(sk, opt, opt->tot_len);
461 break;
462 }
463 case IPV6_UNICAST_HOPS:
464 if (optlen < sizeof(int))
465 goto e_inval;
466 if (val > 255 || val < -1)
467 goto e_inval;
468 np->hop_limit = val;
469 retv = 0;
470 break;
471
472 case IPV6_MULTICAST_HOPS:
473 if (sk->sk_type == SOCK_STREAM)
474 break;
475 if (optlen < sizeof(int))
476 goto e_inval;
477 if (val > 255 || val < -1)
478 goto e_inval;
479 np->mcast_hops = val;
480 retv = 0;
481 break;
482
483 case IPV6_MULTICAST_LOOP:
484 if (optlen < sizeof(int))
485 goto e_inval;
486 if (val != valbool)
487 goto e_inval;
488 np->mc_loop = valbool;
489 retv = 0;
490 break;
491
492 case IPV6_MULTICAST_IF:
493 if (sk->sk_type == SOCK_STREAM)
494 break;
495 if (optlen < sizeof(int))
496 goto e_inval;
497
498 if (val) {
499 struct net_device *dev;
500
501 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
502 goto e_inval;
503
504 dev = dev_get_by_index(net, val);
505 if (!dev) {
506 retv = -ENODEV;
507 break;
508 }
509 dev_put(dev);
510 }
511 np->mcast_oif = val;
512 retv = 0;
513 break;
514 case IPV6_ADD_MEMBERSHIP:
515 case IPV6_DROP_MEMBERSHIP:
516 {
517 struct ipv6_mreq mreq;
518
519 if (optlen < sizeof(struct ipv6_mreq))
520 goto e_inval;
521
522 retv = -EPROTO;
523 if (inet_sk(sk)->is_icsk)
524 break;
525
526 retv = -EFAULT;
527 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
528 break;
529
530 if (optname == IPV6_ADD_MEMBERSHIP)
531 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
532 else
533 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
534 break;
535 }
536 case IPV6_JOIN_ANYCAST:
537 case IPV6_LEAVE_ANYCAST:
538 {
539 struct ipv6_mreq mreq;
540
541 if (optlen < sizeof(struct ipv6_mreq))
542 goto e_inval;
543
544 retv = -EFAULT;
545 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
546 break;
547
548 if (optname == IPV6_JOIN_ANYCAST)
549 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
550 else
551 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
552 break;
553 }
554 case MCAST_JOIN_GROUP:
555 case MCAST_LEAVE_GROUP:
556 {
557 struct group_req greq;
558 struct sockaddr_in6 *psin6;
559
560 if (optlen < sizeof(struct group_req))
561 goto e_inval;
562
563 retv = -EFAULT;
564 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
565 break;
566 if (greq.gr_group.ss_family != AF_INET6) {
567 retv = -EADDRNOTAVAIL;
568 break;
569 }
570 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
571 if (optname == MCAST_JOIN_GROUP)
572 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
573 &psin6->sin6_addr);
574 else
575 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
576 &psin6->sin6_addr);
577 break;
578 }
579 case MCAST_JOIN_SOURCE_GROUP:
580 case MCAST_LEAVE_SOURCE_GROUP:
581 case MCAST_BLOCK_SOURCE:
582 case MCAST_UNBLOCK_SOURCE:
583 {
584 struct group_source_req greqs;
585 int omode, add;
586
587 if (optlen < sizeof(struct group_source_req))
588 goto e_inval;
589 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
590 retv = -EFAULT;
591 break;
592 }
593 if (greqs.gsr_group.ss_family != AF_INET6 ||
594 greqs.gsr_source.ss_family != AF_INET6) {
595 retv = -EADDRNOTAVAIL;
596 break;
597 }
598 if (optname == MCAST_BLOCK_SOURCE) {
599 omode = MCAST_EXCLUDE;
600 add = 1;
601 } else if (optname == MCAST_UNBLOCK_SOURCE) {
602 omode = MCAST_EXCLUDE;
603 add = 0;
604 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
605 struct sockaddr_in6 *psin6;
606
607 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
608 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
609 &psin6->sin6_addr);
610
611 if (retv && retv != -EADDRINUSE)
612 break;
613 omode = MCAST_INCLUDE;
614 add = 1;
615 } else {
616 omode = MCAST_INCLUDE;
617 add = 0;
618 }
619 retv = ip6_mc_source(add, omode, sk, &greqs);
620 break;
621 }
622 case MCAST_MSFILTER:
623 {
624 extern int sysctl_mld_max_msf;
625 struct group_filter *gsf;
626
627 if (optlen < GROUP_FILTER_SIZE(0))
628 goto e_inval;
629 if (optlen > sysctl_optmem_max) {
630 retv = -ENOBUFS;
631 break;
632 }
633 gsf = kmalloc(optlen,GFP_KERNEL);
634 if (!gsf) {
635 retv = -ENOBUFS;
636 break;
637 }
638 retv = -EFAULT;
639 if (copy_from_user(gsf, optval, optlen)) {
640 kfree(gsf);
641 break;
642 }
643
644 if (gsf->gf_numsrc >= 0x1ffffffU ||
645 gsf->gf_numsrc > sysctl_mld_max_msf) {
646 kfree(gsf);
647 retv = -ENOBUFS;
648 break;
649 }
650 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
651 kfree(gsf);
652 retv = -EINVAL;
653 break;
654 }
655 retv = ip6_mc_msfilter(sk, gsf);
656 kfree(gsf);
657
658 break;
659 }
660 case IPV6_ROUTER_ALERT:
661 if (optlen < sizeof(int))
662 goto e_inval;
663 retv = ip6_ra_control(sk, val);
664 break;
665 case IPV6_MTU_DISCOVER:
666 if (optlen < sizeof(int))
667 goto e_inval;
668 if (val<0 || val>3)
669 goto e_inval;
670 np->pmtudisc = val;
671 retv = 0;
672 break;
673 case IPV6_MTU:
674 if (optlen < sizeof(int))
675 goto e_inval;
676 if (val && val < IPV6_MIN_MTU)
677 goto e_inval;
678 np->frag_size = val;
679 retv = 0;
680 break;
681 case IPV6_RECVERR:
682 if (optlen < sizeof(int))
683 goto e_inval;
684 np->recverr = valbool;
685 if (!val)
686 skb_queue_purge(&sk->sk_error_queue);
687 retv = 0;
688 break;
689 case IPV6_FLOWINFO_SEND:
690 if (optlen < sizeof(int))
691 goto e_inval;
692 np->sndflow = valbool;
693 retv = 0;
694 break;
695 case IPV6_FLOWLABEL_MGR:
696 retv = ipv6_flowlabel_opt(sk, optval, optlen);
697 break;
698 case IPV6_IPSEC_POLICY:
699 case IPV6_XFRM_POLICY:
700 retv = -EPERM;
701 if (!capable(CAP_NET_ADMIN))
702 break;
703 retv = xfrm_user_policy(sk, optname, optval, optlen);
704 break;
705
706 case IPV6_ADDR_PREFERENCES:
707 {
708 unsigned int pref = 0;
709 unsigned int prefmask = ~0;
710
711 if (optlen < sizeof(int))
712 goto e_inval;
713
714 retv = -EINVAL;
715
716
717 switch (val & (IPV6_PREFER_SRC_PUBLIC|
718 IPV6_PREFER_SRC_TMP|
719 IPV6_PREFER_SRC_PUBTMP_DEFAULT)) {
720 case IPV6_PREFER_SRC_PUBLIC:
721 pref |= IPV6_PREFER_SRC_PUBLIC;
722 break;
723 case IPV6_PREFER_SRC_TMP:
724 pref |= IPV6_PREFER_SRC_TMP;
725 break;
726 case IPV6_PREFER_SRC_PUBTMP_DEFAULT:
727 break;
728 case 0:
729 goto pref_skip_pubtmp;
730 default:
731 goto e_inval;
732 }
733
734 prefmask &= ~(IPV6_PREFER_SRC_PUBLIC|
735 IPV6_PREFER_SRC_TMP);
736pref_skip_pubtmp:
737
738
739 switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) {
740 case IPV6_PREFER_SRC_HOME:
741 break;
742 case IPV6_PREFER_SRC_COA:
743 pref |= IPV6_PREFER_SRC_COA;
744 case 0:
745 goto pref_skip_coa;
746 default:
747 goto e_inval;
748 }
749
750 prefmask &= ~IPV6_PREFER_SRC_COA;
751pref_skip_coa:
752
753
754 switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) {
755 case IPV6_PREFER_SRC_CGA:
756 case IPV6_PREFER_SRC_NONCGA:
757 case 0:
758 break;
759 default:
760 goto e_inval;
761 }
762
763 np->srcprefs = (np->srcprefs & prefmask) | pref;
764 retv = 0;
765
766 break;
767 }
768 }
769
770 release_sock(sk);
771
772 return retv;
773
774e_inval:
775 release_sock(sk);
776 return -EINVAL;
777}
778
779int ipv6_setsockopt(struct sock *sk, int level, int optname,
780 char __user *optval, unsigned int optlen)
781{
782 int err;
783
784 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
785 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
786
787 if (level != SOL_IPV6)
788 return -ENOPROTOOPT;
789
790 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
791#ifdef CONFIG_NETFILTER
792
793 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
794 optname != IPV6_XFRM_POLICY) {
795 lock_sock(sk);
796 err = nf_setsockopt(sk, PF_INET6, optname, optval,
797 optlen);
798 release_sock(sk);
799 }
800#endif
801 return err;
802}
803
804EXPORT_SYMBOL(ipv6_setsockopt);
805
806#ifdef CONFIG_COMPAT
807int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
808 char __user *optval, unsigned int optlen)
809{
810 int err;
811
812 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
813 if (udp_prot.compat_setsockopt != NULL)
814 return udp_prot.compat_setsockopt(sk, level, optname,
815 optval, optlen);
816 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
817 }
818
819 if (level != SOL_IPV6)
820 return -ENOPROTOOPT;
821
822 if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER)
823 return compat_mc_setsockopt(sk, level, optname, optval, optlen,
824 ipv6_setsockopt);
825
826 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
827#ifdef CONFIG_NETFILTER
828
829 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
830 optname != IPV6_XFRM_POLICY) {
831 lock_sock(sk);
832 err = compat_nf_setsockopt(sk, PF_INET6, optname,
833 optval, optlen);
834 release_sock(sk);
835 }
836#endif
837 return err;
838}
839
840EXPORT_SYMBOL(compat_ipv6_setsockopt);
841#endif
842
843static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
844 int optname, char __user *optval, int len)
845{
846 struct ipv6_opt_hdr *hdr;
847
848 if (!opt)
849 return 0;
850
851 switch(optname) {
852 case IPV6_HOPOPTS:
853 hdr = opt->hopopt;
854 break;
855 case IPV6_RTHDRDSTOPTS:
856 hdr = opt->dst0opt;
857 break;
858 case IPV6_RTHDR:
859 hdr = (struct ipv6_opt_hdr *)opt->srcrt;
860 break;
861 case IPV6_DSTOPTS:
862 hdr = opt->dst1opt;
863 break;
864 default:
865 return -EINVAL;
866 }
867
868 if (!hdr)
869 return 0;
870
871 len = min_t(unsigned int, len, ipv6_optlen(hdr));
872 if (copy_to_user(optval, hdr, len))
873 return -EFAULT;
874 return len;
875}
876
877static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
878 char __user *optval, int __user *optlen)
879{
880 struct ipv6_pinfo *np = inet6_sk(sk);
881 int len;
882 int val;
883
884 if (ip6_mroute_opt(optname))
885 return ip6_mroute_getsockopt(sk, optname, optval, optlen);
886
887 if (get_user(len, optlen))
888 return -EFAULT;
889 switch (optname) {
890 case IPV6_ADDRFORM:
891 if (sk->sk_protocol != IPPROTO_UDP &&
892 sk->sk_protocol != IPPROTO_UDPLITE &&
893 sk->sk_protocol != IPPROTO_TCP)
894 return -ENOPROTOOPT;
895 if (sk->sk_state != TCP_ESTABLISHED)
896 return -ENOTCONN;
897 val = sk->sk_family;
898 break;
899 case MCAST_MSFILTER:
900 {
901 struct group_filter gsf;
902 int err;
903
904 if (len < GROUP_FILTER_SIZE(0))
905 return -EINVAL;
906 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
907 return -EFAULT;
908 if (gsf.gf_group.ss_family != AF_INET6)
909 return -EADDRNOTAVAIL;
910 lock_sock(sk);
911 err = ip6_mc_msfget(sk, &gsf,
912 (struct group_filter __user *)optval, optlen);
913 release_sock(sk);
914 return err;
915 }
916
917 case IPV6_2292PKTOPTIONS:
918 {
919 struct msghdr msg;
920 struct sk_buff *skb;
921
922 if (sk->sk_type != SOCK_STREAM)
923 return -ENOPROTOOPT;
924
925 msg.msg_control = optval;
926 msg.msg_controllen = len;
927 msg.msg_flags = 0;
928
929 lock_sock(sk);
930 skb = np->pktoptions;
931 if (skb)
932 atomic_inc(&skb->users);
933 release_sock(sk);
934
935 if (skb) {
936 int err = datagram_recv_ctl(sk, &msg, skb);
937 kfree_skb(skb);
938 if (err)
939 return err;
940 } else {
941 if (np->rxopt.bits.rxinfo) {
942 struct in6_pktinfo src_info;
943 src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif :
944 np->sticky_pktinfo.ipi6_ifindex;
945 np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) :
946 ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr));
947 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
948 }
949 if (np->rxopt.bits.rxhlim) {
950 int hlim = np->mcast_hops;
951 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
952 }
953 if (np->rxopt.bits.rxoinfo) {
954 struct in6_pktinfo src_info;
955 src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif :
956 np->sticky_pktinfo.ipi6_ifindex;
957 np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) :
958 ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr));
959 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
960 }
961 if (np->rxopt.bits.rxohlim) {
962 int hlim = np->mcast_hops;
963 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
964 }
965 }
966 len -= msg.msg_controllen;
967 return put_user(len, optlen);
968 }
969 case IPV6_MTU:
970 {
971 struct dst_entry *dst;
972 val = 0;
973 lock_sock(sk);
974 dst = sk_dst_get(sk);
975 if (dst) {
976 val = dst_mtu(dst);
977 dst_release(dst);
978 }
979 release_sock(sk);
980 if (!val)
981 return -ENOTCONN;
982 break;
983 }
984
985 case IPV6_V6ONLY:
986 val = np->ipv6only;
987 break;
988
989 case IPV6_RECVPKTINFO:
990 val = np->rxopt.bits.rxinfo;
991 break;
992
993 case IPV6_2292PKTINFO:
994 val = np->rxopt.bits.rxoinfo;
995 break;
996
997 case IPV6_RECVHOPLIMIT:
998 val = np->rxopt.bits.rxhlim;
999 break;
1000
1001 case IPV6_2292HOPLIMIT:
1002 val = np->rxopt.bits.rxohlim;
1003 break;
1004
1005 case IPV6_RECVRTHDR:
1006 val = np->rxopt.bits.srcrt;
1007 break;
1008
1009 case IPV6_2292RTHDR:
1010 val = np->rxopt.bits.osrcrt;
1011 break;
1012
1013 case IPV6_HOPOPTS:
1014 case IPV6_RTHDRDSTOPTS:
1015 case IPV6_RTHDR:
1016 case IPV6_DSTOPTS:
1017 {
1018
1019 lock_sock(sk);
1020 len = ipv6_getsockopt_sticky(sk, np->opt,
1021 optname, optval, len);
1022 release_sock(sk);
1023
1024 if (len < 0)
1025 return len;
1026 return put_user(len, optlen);
1027 }
1028
1029 case IPV6_RECVHOPOPTS:
1030 val = np->rxopt.bits.hopopts;
1031 break;
1032
1033 case IPV6_2292HOPOPTS:
1034 val = np->rxopt.bits.ohopopts;
1035 break;
1036
1037 case IPV6_RECVDSTOPTS:
1038 val = np->rxopt.bits.dstopts;
1039 break;
1040
1041 case IPV6_2292DSTOPTS:
1042 val = np->rxopt.bits.odstopts;
1043 break;
1044
1045 case IPV6_TCLASS:
1046 val = np->tclass;
1047 break;
1048
1049 case IPV6_RECVTCLASS:
1050 val = np->rxopt.bits.rxtclass;
1051 break;
1052
1053 case IPV6_FLOWINFO:
1054 val = np->rxopt.bits.rxflow;
1055 break;
1056
1057 case IPV6_UNICAST_HOPS:
1058 case IPV6_MULTICAST_HOPS:
1059 {
1060 struct dst_entry *dst;
1061
1062 if (optname == IPV6_UNICAST_HOPS)
1063 val = np->hop_limit;
1064 else
1065 val = np->mcast_hops;
1066
1067 dst = sk_dst_get(sk);
1068 if (dst) {
1069 if (val < 0)
1070 val = ip6_dst_hoplimit(dst);
1071 dst_release(dst);
1072 }
1073 if (val < 0)
1074 val = sock_net(sk)->ipv6.devconf_all->hop_limit;
1075 break;
1076 }
1077
1078 case IPV6_MULTICAST_LOOP:
1079 val = np->mc_loop;
1080 break;
1081
1082 case IPV6_MULTICAST_IF:
1083 val = np->mcast_oif;
1084 break;
1085
1086 case IPV6_MTU_DISCOVER:
1087 val = np->pmtudisc;
1088 break;
1089
1090 case IPV6_RECVERR:
1091 val = np->recverr;
1092 break;
1093
1094 case IPV6_FLOWINFO_SEND:
1095 val = np->sndflow;
1096 break;
1097
1098 case IPV6_ADDR_PREFERENCES:
1099 val = 0;
1100
1101 if (np->srcprefs & IPV6_PREFER_SRC_TMP)
1102 val |= IPV6_PREFER_SRC_TMP;
1103 else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC)
1104 val |= IPV6_PREFER_SRC_PUBLIC;
1105 else {
1106
1107 val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT;
1108 }
1109
1110 if (np->srcprefs & IPV6_PREFER_SRC_COA)
1111 val |= IPV6_PREFER_SRC_COA;
1112 else
1113 val |= IPV6_PREFER_SRC_HOME;
1114 break;
1115
1116 default:
1117 return -ENOPROTOOPT;
1118 }
1119 len = min_t(unsigned int, sizeof(int), len);
1120 if(put_user(len, optlen))
1121 return -EFAULT;
1122 if(copy_to_user(optval,&val,len))
1123 return -EFAULT;
1124 return 0;
1125}
1126
1127int ipv6_getsockopt(struct sock *sk, int level, int optname,
1128 char __user *optval, int __user *optlen)
1129{
1130 int err;
1131
1132 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
1133 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1134
1135 if(level != SOL_IPV6)
1136 return -ENOPROTOOPT;
1137
1138 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1139#ifdef CONFIG_NETFILTER
1140
1141 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
1142 int len;
1143
1144 if (get_user(len, optlen))
1145 return -EFAULT;
1146
1147 lock_sock(sk);
1148 err = nf_getsockopt(sk, PF_INET6, optname, optval,
1149 &len);
1150 release_sock(sk);
1151 if (err >= 0)
1152 err = put_user(len, optlen);
1153 }
1154#endif
1155 return err;
1156}
1157
1158EXPORT_SYMBOL(ipv6_getsockopt);
1159
1160#ifdef CONFIG_COMPAT
1161int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
1162 char __user *optval, int __user *optlen)
1163{
1164 int err;
1165
1166 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
1167 if (udp_prot.compat_getsockopt != NULL)
1168 return udp_prot.compat_getsockopt(sk, level, optname,
1169 optval, optlen);
1170 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1171 }
1172
1173 if (level != SOL_IPV6)
1174 return -ENOPROTOOPT;
1175
1176 if (optname == MCAST_MSFILTER)
1177 return compat_mc_getsockopt(sk, level, optname, optval, optlen,
1178 ipv6_getsockopt);
1179
1180 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1181#ifdef CONFIG_NETFILTER
1182
1183 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
1184 int len;
1185
1186 if (get_user(len, optlen))
1187 return -EFAULT;
1188
1189 lock_sock(sk);
1190 err = compat_nf_getsockopt(sk, PF_INET6,
1191 optname, optval, &len);
1192 release_sock(sk);
1193 if (err >= 0)
1194 err = put_user(len, optlen);
1195 }
1196#endif
1197 return err;
1198}
1199
1200EXPORT_SYMBOL(compat_ipv6_getsockopt);
1201#endif
1202
1203
