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pci-acpi: add flag to indicate query had been done
[linux-2.6/mini2440.git] / net / ipv6 / ipv6_sockglue.c
blob26b83e512a0922d86c38144a1c53052b0163eed7
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 Truncate getsockopt returns
20 * o Return an optlen of the truncated length if need be
21 *
22 * Changes:
23 * David L Stevens <dlstevens@us.ibm.com>:
24 * - added multicast source filtering API for MLDv2
25 */
26
27 #include <linux/module.h>
28 #include <linux/capability.h>
29 #include <linux/errno.h>
30 #include <linux/types.h>
31 #include <linux/socket.h>
32 #include <linux/sockios.h>
33 #include <linux/net.h>
34 #include <linux/in6.h>
35 #include <linux/mroute6.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>
53 #include <net/udplite.h>
54 #include <net/xfrm.h>
55 #include <net/compat.h>
56
57 #include <asm/uaccess.h>
58
59 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly;
60
61 struct ip6_ra_chain *ip6_ra_chain;
62 DEFINE_RWLOCK(ip6_ra_lock);
63
64 int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *))
65 {
66 struct ip6_ra_chain *ra, *new_ra, **rap;
67
68 /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
69 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW)
70 return -EINVAL;
71
72 new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
73
74 write_lock_bh(&ip6_ra_lock);
75 for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
76 if (ra->sk == sk) {
77 if (sel>=0) {
78 write_unlock_bh(&ip6_ra_lock);
79 kfree(new_ra);
80 return -EADDRINUSE;
81 }
82
83 *rap = ra->next;
84 write_unlock_bh(&ip6_ra_lock);
85
86 if (ra->destructor)
87 ra->destructor(sk);
88 sock_put(sk);
89 kfree(ra);
90 return 0;
91 }
92 }
93 if (new_ra == NULL) {
94 write_unlock_bh(&ip6_ra_lock);
95 return -ENOBUFS;
96 }
97 new_ra->sk = sk;
98 new_ra->sel = sel;
99 new_ra->destructor = destructor;
100 new_ra->next = ra;
101 *rap = new_ra;
102 sock_hold(sk);
103 write_unlock_bh(&ip6_ra_lock);
104 return 0;
105 }
106
107 static
108 struct ipv6_txoptions *ipv6_update_options(struct sock *sk,
109 struct ipv6_txoptions *opt)
110 {
111 if (inet_sk(sk)->is_icsk) {
112 if (opt &&
113 !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
114 inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
115 struct inet_connection_sock *icsk = inet_csk(sk);
116 icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen;
117 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
118 }
119 opt = xchg(&inet6_sk(sk)->opt, opt);
120 } else {
121 write_lock(&sk->sk_dst_lock);
122 opt = xchg(&inet6_sk(sk)->opt, opt);
123 write_unlock(&sk->sk_dst_lock);
124 }
125 sk_dst_reset(sk);
126
127 return opt;
128 }
129
130 static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
131 char __user *optval, int optlen)
132 {
133 struct ipv6_pinfo *np = inet6_sk(sk);
134 struct net *net = sock_net(sk);
135 int val, valbool;
136 int retv = -ENOPROTOOPT;
137
138 if (optval == NULL)
139 val=0;
140 else {
141 if (optlen >= sizeof(int)) {
142 if (get_user(val, (int __user *) optval))
143 return -EFAULT;
144 } else
145 val = 0;
146 }
147
148 valbool = (val!=0);
149
150 if (ip6_mroute_opt(optname))
151 return ip6_mroute_setsockopt(sk, optname, optval, optlen);
152
153 lock_sock(sk);
154
155 switch (optname) {
156
157 case IPV6_ADDRFORM:
158 if (optlen < sizeof(int))
159 goto e_inval;
160 if (val == PF_INET) {
161 struct ipv6_txoptions *opt;
162 struct sk_buff *pktopt;
163
164 if (sk->sk_type == SOCK_RAW)
165 break;
166
167 if (sk->sk_protocol == IPPROTO_UDP ||
168 sk->sk_protocol == IPPROTO_UDPLITE) {
169 struct udp_sock *up = udp_sk(sk);
170 if (up->pending == AF_INET6) {
171 retv = -EBUSY;
172 break;
173 }
174 } else if (sk->sk_protocol != IPPROTO_TCP)
175 break;
176
177 if (sk->sk_state != TCP_ESTABLISHED) {
178 retv = -ENOTCONN;
179 break;
180 }
181
182 if (ipv6_only_sock(sk) ||
183 !ipv6_addr_v4mapped(&np->daddr)) {
184 retv = -EADDRNOTAVAIL;
185 break;
186 }
187
188 fl6_free_socklist(sk);
189 ipv6_sock_mc_close(sk);
190
191 /*
192 * Sock is moving from IPv6 to IPv4 (sk_prot), so
193 * remove it from the refcnt debug socks count in the
194 * original family...
195 */
196 sk_refcnt_debug_dec(sk);
197
198 if (sk->sk_protocol == IPPROTO_TCP) {
199 struct inet_connection_sock *icsk = inet_csk(sk);
200 local_bh_disable();
201 sock_prot_inuse_add(net, sk->sk_prot, -1);
202 sock_prot_inuse_add(net, &tcp_prot, 1);
203 local_bh_enable();
204 sk->sk_prot = &tcp_prot;
205 icsk->icsk_af_ops = &ipv4_specific;
206 sk->sk_socket->ops = &inet_stream_ops;
207 sk->sk_family = PF_INET;
208 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
209 } else {
210 struct proto *prot = &udp_prot;
211
212 if (sk->sk_protocol == IPPROTO_UDPLITE)
213 prot = &udplite_prot;
214 local_bh_disable();
215 sock_prot_inuse_add(net, sk->sk_prot, -1);
216 sock_prot_inuse_add(net, prot, 1);
217 local_bh_enable();
218 sk->sk_prot = prot;
219 sk->sk_socket->ops = &inet_dgram_ops;
220 sk->sk_family = PF_INET;
221 }
222 opt = xchg(&np->opt, NULL);
223 if (opt)
224 sock_kfree_s(sk, opt, opt->tot_len);
225 pktopt = xchg(&np->pktoptions, NULL);
226 if (pktopt)
227 kfree_skb(pktopt);
228
229 sk->sk_destruct = inet_sock_destruct;
230 /*
231 * ... and add it to the refcnt debug socks count
232 * in the new family. -acme
233 */
234 sk_refcnt_debug_inc(sk);
235 module_put(THIS_MODULE);
236 retv = 0;
237 break;
238 }
239 goto e_inval;
240
241 case IPV6_V6ONLY:
242 if (optlen < sizeof(int) ||
243 inet_sk(sk)->num)
244 goto e_inval;
245 np->ipv6only = valbool;
246 retv = 0;
247 break;
248
249 case IPV6_RECVPKTINFO:
250 if (optlen < sizeof(int))
251 goto e_inval;
252 np->rxopt.bits.rxinfo = valbool;
253 retv = 0;
254 break;
255
256 case IPV6_2292PKTINFO:
257 if (optlen < sizeof(int))
258 goto e_inval;
259 np->rxopt.bits.rxoinfo = valbool;
260 retv = 0;
261 break;
262
263 case IPV6_RECVHOPLIMIT:
264 if (optlen < sizeof(int))
265 goto e_inval;
266 np->rxopt.bits.rxhlim = valbool;
267 retv = 0;
268 break;
269
270 case IPV6_2292HOPLIMIT:
271 if (optlen < sizeof(int))
272 goto e_inval;
273 np->rxopt.bits.rxohlim = valbool;
274 retv = 0;
275 break;
276
277 case IPV6_RECVRTHDR:
278 if (optlen < sizeof(int))
279 goto e_inval;
280 np->rxopt.bits.srcrt = valbool;
281 retv = 0;
282 break;
283
284 case IPV6_2292RTHDR:
285 if (optlen < sizeof(int))
286 goto e_inval;
287 np->rxopt.bits.osrcrt = valbool;
288 retv = 0;
289 break;
290
291 case IPV6_RECVHOPOPTS:
292 if (optlen < sizeof(int))
293 goto e_inval;
294 np->rxopt.bits.hopopts = valbool;
295 retv = 0;
296 break;
297
298 case IPV6_2292HOPOPTS:
299 if (optlen < sizeof(int))
300 goto e_inval;
301 np->rxopt.bits.ohopopts = valbool;
302 retv = 0;
303 break;
304
305 case IPV6_RECVDSTOPTS:
306 if (optlen < sizeof(int))
307 goto e_inval;
308 np->rxopt.bits.dstopts = valbool;
309 retv = 0;
310 break;
311
312 case IPV6_2292DSTOPTS:
313 if (optlen < sizeof(int))
314 goto e_inval;
315 np->rxopt.bits.odstopts = valbool;
316 retv = 0;
317 break;
318
319 case IPV6_TCLASS:
320 if (optlen < sizeof(int))
321 goto e_inval;
322 if (val < -1 || val > 0xff)
323 goto e_inval;
324 np->tclass = val;
325 retv = 0;
326 break;
327
328 case IPV6_RECVTCLASS:
329 if (optlen < sizeof(int))
330 goto e_inval;
331 np->rxopt.bits.rxtclass = valbool;
332 retv = 0;
333 break;
334
335 case IPV6_FLOWINFO:
336 if (optlen < sizeof(int))
337 goto e_inval;
338 np->rxopt.bits.rxflow = valbool;
339 retv = 0;
340 break;
341
342 case IPV6_HOPOPTS:
343 case IPV6_RTHDRDSTOPTS:
344 case IPV6_RTHDR:
345 case IPV6_DSTOPTS:
346 {
347 struct ipv6_txoptions *opt;
348 if (optlen == 0)
349 optval = NULL;
350
351 /* hop-by-hop / destination options are privileged option */
352 retv = -EPERM;
353 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
354 break;
355
356 if (optlen < sizeof(struct ipv6_opt_hdr) ||
357 optlen & 0x7 || optlen > 8 * 255)
358 goto e_inval;
359
360 opt = ipv6_renew_options(sk, np->opt, optname,
361 (struct ipv6_opt_hdr __user *)optval,
362 optlen);
363 if (IS_ERR(opt)) {
364 retv = PTR_ERR(opt);
365 break;
366 }
367
368 /* routing header option needs extra check */
369 if (optname == IPV6_RTHDR && opt && opt->srcrt) {
370 struct ipv6_rt_hdr *rthdr = opt->srcrt;
371 switch (rthdr->type) {
372 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
373 case IPV6_SRCRT_TYPE_2:
374 break;
375 #endif
376 default:
377 goto sticky_done;
378 }
379
380 if ((rthdr->hdrlen & 1) ||
381 (rthdr->hdrlen >> 1) != rthdr->segments_left)
382 goto sticky_done;
383 }
384
385 retv = 0;
386 opt = ipv6_update_options(sk, opt);
387 sticky_done:
388 if (opt)
389 sock_kfree_s(sk, opt, opt->tot_len);
390 break;
391 }
392
393 case IPV6_2292PKTOPTIONS:
394 {
395 struct ipv6_txoptions *opt = NULL;
396 struct msghdr msg;
397 struct flowi fl;
398 int junk;
399
400 fl.fl6_flowlabel = 0;
401 fl.oif = sk->sk_bound_dev_if;
402
403 if (optlen == 0)
404 goto update;
405
406 /* 1K is probably excessive
407 * 1K is surely not enough, 2K per standard header is 16K.
408 */
409 retv = -EINVAL;
410 if (optlen > 64*1024)
411 break;
412
413 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
414 retv = -ENOBUFS;
415 if (opt == NULL)
416 break;
417
418 memset(opt, 0, sizeof(*opt));
419 opt->tot_len = sizeof(*opt) + optlen;
420 retv = -EFAULT;
421 if (copy_from_user(opt+1, optval, optlen))
422 goto done;
423
424 msg.msg_controllen = optlen;
425 msg.msg_control = (void*)(opt+1);
426
427 retv = datagram_send_ctl(net, &msg, &fl, opt, &junk, &junk);
428 if (retv)
429 goto done;
430 update:
431 retv = 0;
432 opt = ipv6_update_options(sk, opt);
433 done:
434 if (opt)
435 sock_kfree_s(sk, opt, opt->tot_len);
436 break;
437 }
438 case IPV6_UNICAST_HOPS:
439 if (optlen < sizeof(int))
440 goto e_inval;
441 if (val > 255 || val < -1)
442 goto e_inval;
443 np->hop_limit = val;
444 retv = 0;
445 break;
446
447 case IPV6_MULTICAST_HOPS:
448 if (sk->sk_type == SOCK_STREAM)
449 goto e_inval;
450 if (optlen < sizeof(int))
451 goto e_inval;
452 if (val > 255 || val < -1)
453 goto e_inval;
454 np->mcast_hops = val;
455 retv = 0;
456 break;
457
458 case IPV6_MULTICAST_LOOP:
459 if (optlen < sizeof(int))
460 goto e_inval;
461 np->mc_loop = valbool;
462 retv = 0;
463 break;
464
465 case IPV6_MULTICAST_IF:
466 if (sk->sk_type == SOCK_STREAM)
467 goto e_inval;
468 if (optlen < sizeof(int))
469 goto e_inval;
470
471 if (val) {
472 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
473 goto e_inval;
474
475 if (__dev_get_by_index(net, val) == NULL) {
476 retv = -ENODEV;
477 break;
478 }
479 }
480 np->mcast_oif = val;
481 retv = 0;
482 break;
483 case IPV6_ADD_MEMBERSHIP:
484 case IPV6_DROP_MEMBERSHIP:
485 {
486 struct ipv6_mreq mreq;
487
488 if (optlen < sizeof(struct ipv6_mreq))
489 goto e_inval;
490
491 retv = -EPROTO;
492 if (inet_sk(sk)->is_icsk)
493 break;
494
495 retv = -EFAULT;
496 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
497 break;
498
499 if (optname == IPV6_ADD_MEMBERSHIP)
500 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
501 else
502 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
503 break;
504 }
505 case IPV6_JOIN_ANYCAST:
506 case IPV6_LEAVE_ANYCAST:
507 {
508 struct ipv6_mreq mreq;
509
510 if (optlen < sizeof(struct ipv6_mreq))
511 goto e_inval;
512
513 retv = -EFAULT;
514 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
515 break;
516
517 if (optname == IPV6_JOIN_ANYCAST)
518 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
519 else
520 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
521 break;
522 }
523 case MCAST_JOIN_GROUP:
524 case MCAST_LEAVE_GROUP:
525 {
526 struct group_req greq;
527 struct sockaddr_in6 *psin6;
528
529 if (optlen < sizeof(struct group_req))
530 goto e_inval;
531
532 retv = -EFAULT;
533 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
534 break;
535 if (greq.gr_group.ss_family != AF_INET6) {
536 retv = -EADDRNOTAVAIL;
537 break;
538 }
539 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
540 if (optname == MCAST_JOIN_GROUP)
541 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
542 &psin6->sin6_addr);
543 else
544 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
545 &psin6->sin6_addr);
546 break;
547 }
548 case MCAST_JOIN_SOURCE_GROUP:
549 case MCAST_LEAVE_SOURCE_GROUP:
550 case MCAST_BLOCK_SOURCE:
551 case MCAST_UNBLOCK_SOURCE:
552 {
553 struct group_source_req greqs;
554 int omode, add;
555
556 if (optlen < sizeof(struct group_source_req))
557 goto e_inval;
558 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
559 retv = -EFAULT;
560 break;
561 }
562 if (greqs.gsr_group.ss_family != AF_INET6 ||
563 greqs.gsr_source.ss_family != AF_INET6) {
564 retv = -EADDRNOTAVAIL;
565 break;
566 }
567 if (optname == MCAST_BLOCK_SOURCE) {
568 omode = MCAST_EXCLUDE;
569 add = 1;
570 } else if (optname == MCAST_UNBLOCK_SOURCE) {
571 omode = MCAST_EXCLUDE;
572 add = 0;
573 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
574 struct sockaddr_in6 *psin6;
575
576 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
577 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
578 &psin6->sin6_addr);
579 /* prior join w/ different source is ok */
580 if (retv && retv != -EADDRINUSE)
581 break;
582 omode = MCAST_INCLUDE;
583 add = 1;
584 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
585 omode = MCAST_INCLUDE;
586 add = 0;
587 }
588 retv = ip6_mc_source(add, omode, sk, &greqs);
589 break;
590 }
591 case MCAST_MSFILTER:
592 {
593 extern int sysctl_mld_max_msf;
594 struct group_filter *gsf;
595
596 if (optlen < GROUP_FILTER_SIZE(0))
597 goto e_inval;
598 if (optlen > sysctl_optmem_max) {
599 retv = -ENOBUFS;
600 break;
601 }
602 gsf = kmalloc(optlen,GFP_KERNEL);
603 if (!gsf) {
604 retv = -ENOBUFS;
605 break;
606 }
607 retv = -EFAULT;
608 if (copy_from_user(gsf, optval, optlen)) {
609 kfree(gsf);
610 break;
611 }
612 /* numsrc >= (4G-140)/128 overflow in 32 bits */
613 if (gsf->gf_numsrc >= 0x1ffffffU ||
614 gsf->gf_numsrc > sysctl_mld_max_msf) {
615 kfree(gsf);
616 retv = -ENOBUFS;
617 break;
618 }
619 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
620 kfree(gsf);
621 retv = -EINVAL;
622 break;
623 }
624 retv = ip6_mc_msfilter(sk, gsf);
625 kfree(gsf);
626
627 break;
628 }
629 case IPV6_ROUTER_ALERT:
630 if (optlen < sizeof(int))
631 goto e_inval;
632 retv = ip6_ra_control(sk, val, NULL);
633 break;
634 case IPV6_MTU_DISCOVER:
635 if (optlen < sizeof(int))
636 goto e_inval;
637 if (val<0 || val>3)
638 goto e_inval;
639 np->pmtudisc = val;
640 retv = 0;
641 break;
642 case IPV6_MTU:
643 if (optlen < sizeof(int))
644 goto e_inval;
645 if (val && val < IPV6_MIN_MTU)
646 goto e_inval;
647 np->frag_size = val;
648 retv = 0;
649 break;
650 case IPV6_RECVERR:
651 if (optlen < sizeof(int))
652 goto e_inval;
653 np->recverr = valbool;
654 if (!val)
655 skb_queue_purge(&sk->sk_error_queue);
656 retv = 0;
657 break;
658 case IPV6_FLOWINFO_SEND:
659 if (optlen < sizeof(int))
660 goto e_inval;
661 np->sndflow = valbool;
662 retv = 0;
663 break;
664 case IPV6_FLOWLABEL_MGR:
665 retv = ipv6_flowlabel_opt(sk, optval, optlen);
666 break;
667 case IPV6_IPSEC_POLICY:
668 case IPV6_XFRM_POLICY:
669 retv = -EPERM;
670 if (!capable(CAP_NET_ADMIN))
671 break;
672 retv = xfrm_user_policy(sk, optname, optval, optlen);
673 break;
674
675 case IPV6_ADDR_PREFERENCES:
676 {
677 unsigned int pref = 0;
678 unsigned int prefmask = ~0;
679
680 if (optlen < sizeof(int))
681 goto e_inval;
682
683 retv = -EINVAL;
684
685 /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */
686 switch (val & (IPV6_PREFER_SRC_PUBLIC|
687 IPV6_PREFER_SRC_TMP|
688 IPV6_PREFER_SRC_PUBTMP_DEFAULT)) {
689 case IPV6_PREFER_SRC_PUBLIC:
690 pref |= IPV6_PREFER_SRC_PUBLIC;
691 break;
692 case IPV6_PREFER_SRC_TMP:
693 pref |= IPV6_PREFER_SRC_TMP;
694 break;
695 case IPV6_PREFER_SRC_PUBTMP_DEFAULT:
696 break;
697 case 0:
698 goto pref_skip_pubtmp;
699 default:
700 goto e_inval;
701 }
702
703 prefmask &= ~(IPV6_PREFER_SRC_PUBLIC|
704 IPV6_PREFER_SRC_TMP);
705 pref_skip_pubtmp:
706
707 /* check HOME/COA conflicts */
708 switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) {
709 case IPV6_PREFER_SRC_HOME:
710 break;
711 case IPV6_PREFER_SRC_COA:
712 pref |= IPV6_PREFER_SRC_COA;
713 case 0:
714 goto pref_skip_coa;
715 default:
716 goto e_inval;
717 }
718
719 prefmask &= ~IPV6_PREFER_SRC_COA;
720 pref_skip_coa:
721
722 /* check CGA/NONCGA conflicts */
723 switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) {
724 case IPV6_PREFER_SRC_CGA:
725 case IPV6_PREFER_SRC_NONCGA:
726 case 0:
727 break;
728 default:
729 goto e_inval;
730 }
731
732 np->srcprefs = (np->srcprefs & prefmask) | pref;
733 retv = 0;
734
735 break;
736 }
737 }
738
739 release_sock(sk);
740
741 return retv;
742
743 e_inval:
744 release_sock(sk);
745 return -EINVAL;
746 }
747
748 int ipv6_setsockopt(struct sock *sk, int level, int optname,
749 char __user *optval, int optlen)
750 {
751 int err;
752
753 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
754 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
755
756 if (level != SOL_IPV6)
757 return -ENOPROTOOPT;
758
759 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
760 #ifdef CONFIG_NETFILTER
761 /* we need to exclude all possible ENOPROTOOPTs except default case */
762 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
763 optname != IPV6_XFRM_POLICY) {
764 lock_sock(sk);
765 err = nf_setsockopt(sk, PF_INET6, optname, optval,
766 optlen);
767 release_sock(sk);
768 }
769 #endif
770 return err;
771 }
772
773 EXPORT_SYMBOL(ipv6_setsockopt);
774
775 #ifdef CONFIG_COMPAT
776 int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
777 char __user *optval, int optlen)
778 {
779 int err;
780
781 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
782 if (udp_prot.compat_setsockopt != NULL)
783 return udp_prot.compat_setsockopt(sk, level, optname,
784 optval, optlen);
785 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
786 }
787
788 if (level != SOL_IPV6)
789 return -ENOPROTOOPT;
790
791 if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER)
792 return compat_mc_setsockopt(sk, level, optname, optval, optlen,
793 ipv6_setsockopt);
794
795 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
796 #ifdef CONFIG_NETFILTER
797 /* we need to exclude all possible ENOPROTOOPTs except default case */
798 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
799 optname != IPV6_XFRM_POLICY) {
800 lock_sock(sk);
801 err = compat_nf_setsockopt(sk, PF_INET6, optname,
802 optval, optlen);
803 release_sock(sk);
804 }
805 #endif
806 return err;
807 }
808
809 EXPORT_SYMBOL(compat_ipv6_setsockopt);
810 #endif
811
812 static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
813 int optname, char __user *optval, int len)
814 {
815 struct ipv6_opt_hdr *hdr;
816
817 if (!opt)
818 return 0;
819
820 switch(optname) {
821 case IPV6_HOPOPTS:
822 hdr = opt->hopopt;
823 break;
824 case IPV6_RTHDRDSTOPTS:
825 hdr = opt->dst0opt;
826 break;
827 case IPV6_RTHDR:
828 hdr = (struct ipv6_opt_hdr *)opt->srcrt;
829 break;
830 case IPV6_DSTOPTS:
831 hdr = opt->dst1opt;
832 break;
833 default:
834 return -EINVAL; /* should not happen */
835 }
836
837 if (!hdr)
838 return 0;
839
840 len = min_t(unsigned int, len, ipv6_optlen(hdr));
841 if (copy_to_user(optval, hdr, len))
842 return -EFAULT;
843 return len;
844 }
845
846 static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
847 char __user *optval, int __user *optlen)
848 {
849 struct ipv6_pinfo *np = inet6_sk(sk);
850 int len;
851 int val;
852
853 if (ip6_mroute_opt(optname))
854 return ip6_mroute_getsockopt(sk, optname, optval, optlen);
855
856 if (get_user(len, optlen))
857 return -EFAULT;
858 switch (optname) {
859 case IPV6_ADDRFORM:
860 if (sk->sk_protocol != IPPROTO_UDP &&
861 sk->sk_protocol != IPPROTO_UDPLITE &&
862 sk->sk_protocol != IPPROTO_TCP)
863 return -EINVAL;
864 if (sk->sk_state != TCP_ESTABLISHED)
865 return -ENOTCONN;
866 val = sk->sk_family;
867 break;
868 case MCAST_MSFILTER:
869 {
870 struct group_filter gsf;
871 int err;
872
873 if (len < GROUP_FILTER_SIZE(0))
874 return -EINVAL;
875 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
876 return -EFAULT;
877 lock_sock(sk);
878 err = ip6_mc_msfget(sk, &gsf,
879 (struct group_filter __user *)optval, optlen);
880 release_sock(sk);
881 return err;
882 }
883
884 case IPV6_2292PKTOPTIONS:
885 {
886 struct msghdr msg;
887 struct sk_buff *skb;
888
889 if (sk->sk_type != SOCK_STREAM)
890 return -ENOPROTOOPT;
891
892 msg.msg_control = optval;
893 msg.msg_controllen = len;
894 msg.msg_flags = 0;
895
896 lock_sock(sk);
897 skb = np->pktoptions;
898 if (skb)
899 atomic_inc(&skb->users);
900 release_sock(sk);
901
902 if (skb) {
903 int err = datagram_recv_ctl(sk, &msg, skb);
904 kfree_skb(skb);
905 if (err)
906 return err;
907 } else {
908 if (np->rxopt.bits.rxinfo) {
909 struct in6_pktinfo src_info;
910 src_info.ipi6_ifindex = np->mcast_oif;
911 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
912 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
913 }
914 if (np->rxopt.bits.rxhlim) {
915 int hlim = np->mcast_hops;
916 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
917 }
918 if (np->rxopt.bits.rxoinfo) {
919 struct in6_pktinfo src_info;
920 src_info.ipi6_ifindex = np->mcast_oif;
921 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
922 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
923 }
924 if (np->rxopt.bits.rxohlim) {
925 int hlim = np->mcast_hops;
926 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
927 }
928 }
929 len -= msg.msg_controllen;
930 return put_user(len, optlen);
931 }
932 case IPV6_MTU:
933 {
934 struct dst_entry *dst;
935 val = 0;
936 lock_sock(sk);
937 dst = sk_dst_get(sk);
938 if (dst) {
939 val = dst_mtu(dst);
940 dst_release(dst);
941 }
942 release_sock(sk);
943 if (!val)
944 return -ENOTCONN;
945 break;
946 }
947
948 case IPV6_V6ONLY:
949 val = np->ipv6only;
950 break;
951
952 case IPV6_RECVPKTINFO:
953 val = np->rxopt.bits.rxinfo;
954 break;
955
956 case IPV6_2292PKTINFO:
957 val = np->rxopt.bits.rxoinfo;
958 break;
959
960 case IPV6_RECVHOPLIMIT:
961 val = np->rxopt.bits.rxhlim;
962 break;
963
964 case IPV6_2292HOPLIMIT:
965 val = np->rxopt.bits.rxohlim;
966 break;
967
968 case IPV6_RECVRTHDR:
969 val = np->rxopt.bits.srcrt;
970 break;
971
972 case IPV6_2292RTHDR:
973 val = np->rxopt.bits.osrcrt;
974 break;
975
976 case IPV6_HOPOPTS:
977 case IPV6_RTHDRDSTOPTS:
978 case IPV6_RTHDR:
979 case IPV6_DSTOPTS:
980 {
981
982 lock_sock(sk);
983 len = ipv6_getsockopt_sticky(sk, np->opt,
984 optname, optval, len);
985 release_sock(sk);
986 /* check if ipv6_getsockopt_sticky() returns err code */
987 if (len < 0)
988 return len;
989 return put_user(len, optlen);
990 }
991
992 case IPV6_RECVHOPOPTS:
993 val = np->rxopt.bits.hopopts;
994 break;
995
996 case IPV6_2292HOPOPTS:
997 val = np->rxopt.bits.ohopopts;
998 break;
999
1000 case IPV6_RECVDSTOPTS:
1001 val = np->rxopt.bits.dstopts;
1002 break;
1003
1004 case IPV6_2292DSTOPTS:
1005 val = np->rxopt.bits.odstopts;
1006 break;
1007
1008 case IPV6_TCLASS:
1009 val = np->tclass;
1010 if (val < 0)
1011 val = 0;
1012 break;
1013
1014 case IPV6_RECVTCLASS:
1015 val = np->rxopt.bits.rxtclass;
1016 break;
1017
1018 case IPV6_FLOWINFO:
1019 val = np->rxopt.bits.rxflow;
1020 break;
1021
1022 case IPV6_UNICAST_HOPS:
1023 case IPV6_MULTICAST_HOPS:
1024 {
1025 struct dst_entry *dst;
1026
1027 if (optname == IPV6_UNICAST_HOPS)
1028 val = np->hop_limit;
1029 else
1030 val = np->mcast_hops;
1031
1032 dst = sk_dst_get(sk);
1033 if (dst) {
1034 if (val < 0)
1035 val = ip6_dst_hoplimit(dst);
1036 dst_release(dst);
1037 }
1038 if (val < 0)
1039 val = ipv6_devconf.hop_limit;
1040 break;
1041 }
1042
1043 case IPV6_MULTICAST_LOOP:
1044 val = np->mc_loop;
1045 break;
1046
1047 case IPV6_MULTICAST_IF:
1048 val = np->mcast_oif;
1049 break;
1050
1051 case IPV6_MTU_DISCOVER:
1052 val = np->pmtudisc;
1053 break;
1054
1055 case IPV6_RECVERR:
1056 val = np->recverr;
1057 break;
1058
1059 case IPV6_FLOWINFO_SEND:
1060 val = np->sndflow;
1061 break;
1062
1063 case IPV6_ADDR_PREFERENCES:
1064 val = 0;
1065
1066 if (np->srcprefs & IPV6_PREFER_SRC_TMP)
1067 val |= IPV6_PREFER_SRC_TMP;
1068 else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC)
1069 val |= IPV6_PREFER_SRC_PUBLIC;
1070 else {
1071 /* XXX: should we return system default? */
1072 val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT;
1073 }
1074
1075 if (np->srcprefs & IPV6_PREFER_SRC_COA)
1076 val |= IPV6_PREFER_SRC_COA;
1077 else
1078 val |= IPV6_PREFER_SRC_HOME;
1079 break;
1080
1081 default:
1082 return -ENOPROTOOPT;
1083 }
1084 len = min_t(unsigned int, sizeof(int), len);
1085 if(put_user(len, optlen))
1086 return -EFAULT;
1087 if(copy_to_user(optval,&val,len))
1088 return -EFAULT;
1089 return 0;
1090 }
1091
1092 int ipv6_getsockopt(struct sock *sk, int level, int optname,
1093 char __user *optval, int __user *optlen)
1094 {
1095 int err;
1096
1097 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
1098 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1099
1100 if(level != SOL_IPV6)
1101 return -ENOPROTOOPT;
1102
1103 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1104 #ifdef CONFIG_NETFILTER
1105 /* we need to exclude all possible ENOPROTOOPTs except default case */
1106 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
1107 int len;
1108
1109 if (get_user(len, optlen))
1110 return -EFAULT;
1111
1112 lock_sock(sk);
1113 err = nf_getsockopt(sk, PF_INET6, optname, optval,
1114 &len);
1115 release_sock(sk);
1116 if (err >= 0)
1117 err = put_user(len, optlen);
1118 }
1119 #endif
1120 return err;
1121 }
1122
1123 EXPORT_SYMBOL(ipv6_getsockopt);
1124
1125 #ifdef CONFIG_COMPAT
1126 int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
1127 char __user *optval, int __user *optlen)
1128 {
1129 int err;
1130
1131 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
1132 if (udp_prot.compat_getsockopt != NULL)
1133 return udp_prot.compat_getsockopt(sk, level, optname,
1134 optval, optlen);
1135 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1136 }
1137
1138 if (level != SOL_IPV6)
1139 return -ENOPROTOOPT;
1140
1141 if (optname == MCAST_MSFILTER)
1142 return compat_mc_getsockopt(sk, level, optname, optval, optlen,
1143 ipv6_getsockopt);
1144
1145 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1146 #ifdef CONFIG_NETFILTER
1147 /* we need to exclude all possible ENOPROTOOPTs except default case */
1148 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
1149 int len;
1150
1151 if (get_user(len, optlen))
1152 return -EFAULT;
1153
1154 lock_sock(sk);
1155 err = compat_nf_getsockopt(sk, PF_INET6,
1156 optname, optval, &len);
1157 release_sock(sk);
1158 if (err >= 0)
1159 err = put_user(len, optlen);
1160 }
1161 #endif
1162 return err;
1163 }
1164
1165 EXPORT_SYMBOL(compat_ipv6_getsockopt);
1166 #endif
1167
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