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btrfs: Drop __exit attribute on btrfs_exit_compress
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / ipv6 / ipv6_sockglue.c
bloba7f66bc8f0b0ef2a8b0eee454c1e103344eda417
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 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * FIXME: Make the setsockopt code POSIX compliant: That is
16 *
17 * o Truncate getsockopt returns
18 * o Return an optlen of the truncated length if need be
19 *
20 * Changes:
21 * David L Stevens <dlstevens@us.ibm.com>:
22 * - added multicast source filtering API for MLDv2
23 */
24
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 #include <linux/slab.h>
40
41 #include <net/sock.h>
42 #include <net/snmp.h>
43 #include <net/ipv6.h>
44 #include <net/ndisc.h>
45 #include <net/protocol.h>
46 #include <net/transp_v6.h>
47 #include <net/ip6_route.h>
48 #include <net/addrconf.h>
49 #include <net/inet_common.h>
50 #include <net/tcp.h>
51 #include <net/udp.h>
52 #include <net/udplite.h>
53 #include <net/xfrm.h>
54 #include <net/compat.h>
55
56 #include <asm/uaccess.h>
57
58 struct ip6_ra_chain *ip6_ra_chain;
59 DEFINE_RWLOCK(ip6_ra_lock);
60
61 int ip6_ra_control(struct sock *sk, int sel)
62 {
63 struct ip6_ra_chain *ra, *new_ra, **rap;
64
65 /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
66 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num != IPPROTO_RAW)
67 return -ENOPROTOOPT;
68
69 new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
70
71 write_lock_bh(&ip6_ra_lock);
72 for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
73 if (ra->sk == sk) {
74 if (sel>=0) {
75 write_unlock_bh(&ip6_ra_lock);
76 kfree(new_ra);
77 return -EADDRINUSE;
78 }
79
80 *rap = ra->next;
81 write_unlock_bh(&ip6_ra_lock);
82
83 sock_put(sk);
84 kfree(ra);
85 return 0;
86 }
87 }
88 if (new_ra == NULL) {
89 write_unlock_bh(&ip6_ra_lock);
90 return -ENOBUFS;
91 }
92 new_ra->sk = sk;
93 new_ra->sel = sel;
94 new_ra->next = ra;
95 *rap = new_ra;
96 sock_hold(sk);
97 write_unlock_bh(&ip6_ra_lock);
98 return 0;
99 }
100
101 static
102 struct ipv6_txoptions *ipv6_update_options(struct sock *sk,
103 struct ipv6_txoptions *opt)
104 {
105 if (inet_sk(sk)->is_icsk) {
106 if (opt &&
107 !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
108 inet_sk(sk)->inet_daddr != LOOPBACK4_IPV6) {
109 struct inet_connection_sock *icsk = inet_csk(sk);
110 icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen;
111 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
112 }
113 opt = xchg(&inet6_sk(sk)->opt, opt);
114 } else {
115 spin_lock(&sk->sk_dst_lock);
116 opt = xchg(&inet6_sk(sk)->opt, opt);
117 spin_unlock(&sk->sk_dst_lock);
118 }
119 sk_dst_reset(sk);
120
121 return opt;
122 }
123
124 static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
125 char __user *optval, unsigned int optlen)
126 {
127 struct ipv6_pinfo *np = inet6_sk(sk);
128 struct net *net = sock_net(sk);
129 int val, valbool;
130 int retv = -ENOPROTOOPT;
131
132 if (optval == NULL)
133 val=0;
134 else {
135 if (optlen >= sizeof(int)) {
136 if (get_user(val, (int __user *) optval))
137 return -EFAULT;
138 } else
139 val = 0;
140 }
141
142 valbool = (val!=0);
143
144 if (ip6_mroute_opt(optname))
145 return ip6_mroute_setsockopt(sk, optname, optval, optlen);
146
147 lock_sock(sk);
148
149 switch (optname) {
150
151 case IPV6_ADDRFORM:
152 if (optlen < sizeof(int))
153 goto e_inval;
154 if (val == PF_INET) {
155 struct ipv6_txoptions *opt;
156 struct sk_buff *pktopt;
157
158 if (sk->sk_type == SOCK_RAW)
159 break;
160
161 if (sk->sk_protocol == IPPROTO_UDP ||
162 sk->sk_protocol == IPPROTO_UDPLITE) {
163 struct udp_sock *up = udp_sk(sk);
164 if (up->pending == AF_INET6) {
165 retv = -EBUSY;
166 break;
167 }
168 } else if (sk->sk_protocol != IPPROTO_TCP)
169 break;
170
171 if (sk->sk_state != TCP_ESTABLISHED) {
172 retv = -ENOTCONN;
173 break;
174 }
175
176 if (ipv6_only_sock(sk) ||
177 !ipv6_addr_v4mapped(&np->daddr)) {
178 retv = -EADDRNOTAVAIL;
179 break;
180 }
181
182 fl6_free_socklist(sk);
183 ipv6_sock_mc_close(sk);
184
185 /*
186 * Sock is moving from IPv6 to IPv4 (sk_prot), so
187 * remove it from the refcnt debug socks count in the
188 * original family...
189 */
190 sk_refcnt_debug_dec(sk);
191
192 if (sk->sk_protocol == IPPROTO_TCP) {
193 struct inet_connection_sock *icsk = inet_csk(sk);
194 local_bh_disable();
195 sock_prot_inuse_add(net, sk->sk_prot, -1);
196 sock_prot_inuse_add(net, &tcp_prot, 1);
197 local_bh_enable();
198 sk->sk_prot = &tcp_prot;
199 icsk->icsk_af_ops = &ipv4_specific;
200 sk->sk_socket->ops = &inet_stream_ops;
201 sk->sk_family = PF_INET;
202 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
203 } else {
204 struct proto *prot = &udp_prot;
205
206 if (sk->sk_protocol == IPPROTO_UDPLITE)
207 prot = &udplite_prot;
208 local_bh_disable();
209 sock_prot_inuse_add(net, sk->sk_prot, -1);
210 sock_prot_inuse_add(net, prot, 1);
211 local_bh_enable();
212 sk->sk_prot = prot;
213 sk->sk_socket->ops = &inet_dgram_ops;
214 sk->sk_family = PF_INET;
215 }
216 opt = xchg(&np->opt, NULL);
217 if (opt)
218 sock_kfree_s(sk, opt, opt->tot_len);
219 pktopt = xchg(&np->pktoptions, NULL);
220 kfree_skb(pktopt);
221
222 sk->sk_destruct = inet_sock_destruct;
223 /*
224 * ... and add it to the refcnt debug socks count
225 * in the new family. -acme
226 */
227 sk_refcnt_debug_inc(sk);
228 module_put(THIS_MODULE);
229 retv = 0;
230 break;
231 }
232 goto e_inval;
233
234 case IPV6_V6ONLY:
235 if (optlen < sizeof(int) ||
236 inet_sk(sk)->inet_num)
237 goto e_inval;
238 np->ipv6only = valbool;
239 retv = 0;
240 break;
241
242 case IPV6_RECVPKTINFO:
243 if (optlen < sizeof(int))
244 goto e_inval;
245 np->rxopt.bits.rxinfo = valbool;
246 retv = 0;
247 break;
248
249 case IPV6_2292PKTINFO:
250 if (optlen < sizeof(int))
251 goto e_inval;
252 np->rxopt.bits.rxoinfo = valbool;
253 retv = 0;
254 break;
255
256 case IPV6_RECVHOPLIMIT:
257 if (optlen < sizeof(int))
258 goto e_inval;
259 np->rxopt.bits.rxhlim = valbool;
260 retv = 0;
261 break;
262
263 case IPV6_2292HOPLIMIT:
264 if (optlen < sizeof(int))
265 goto e_inval;
266 np->rxopt.bits.rxohlim = valbool;
267 retv = 0;
268 break;
269
270 case IPV6_RECVRTHDR:
271 if (optlen < sizeof(int))
272 goto e_inval;
273 np->rxopt.bits.srcrt = valbool;
274 retv = 0;
275 break;
276
277 case IPV6_2292RTHDR:
278 if (optlen < sizeof(int))
279 goto e_inval;
280 np->rxopt.bits.osrcrt = valbool;
281 retv = 0;
282 break;
283
284 case IPV6_RECVHOPOPTS:
285 if (optlen < sizeof(int))
286 goto e_inval;
287 np->rxopt.bits.hopopts = valbool;
288 retv = 0;
289 break;
290
291 case IPV6_2292HOPOPTS:
292 if (optlen < sizeof(int))
293 goto e_inval;
294 np->rxopt.bits.ohopopts = valbool;
295 retv = 0;
296 break;
297
298 case IPV6_RECVDSTOPTS:
299 if (optlen < sizeof(int))
300 goto e_inval;
301 np->rxopt.bits.dstopts = valbool;
302 retv = 0;
303 break;
304
305 case IPV6_2292DSTOPTS:
306 if (optlen < sizeof(int))
307 goto e_inval;
308 np->rxopt.bits.odstopts = valbool;
309 retv = 0;
310 break;
311
312 case IPV6_TCLASS:
313 if (optlen < sizeof(int))
314 goto e_inval;
315 if (val < -1 || val > 0xff)
316 goto e_inval;
317 /* RFC 3542, 6.5: default traffic class of 0x0 */
318 if (val == -1)
319 val = 0;
320 np->tclass = val;
321 retv = 0;
322 break;
323
324 case IPV6_RECVTCLASS:
325 if (optlen < sizeof(int))
326 goto e_inval;
327 np->rxopt.bits.rxtclass = valbool;
328 retv = 0;
329 break;
330
331 case IPV6_FLOWINFO:
332 if (optlen < sizeof(int))
333 goto e_inval;
334 np->rxopt.bits.rxflow = valbool;
335 retv = 0;
336 break;
337
338 case IPV6_RECVPATHMTU:
339 if (optlen < sizeof(int))
340 goto e_inval;
341 np->rxopt.bits.rxpmtu = valbool;
342 retv = 0;
343 break;
344
345 case IPV6_HOPOPTS:
346 case IPV6_RTHDRDSTOPTS:
347 case IPV6_RTHDR:
348 case IPV6_DSTOPTS:
349 {
350 struct ipv6_txoptions *opt;
351
352 /* remove any sticky options header with a zero option
353 * length, per RFC3542.
354 */
355 if (optlen == 0)
356 optval = NULL;
357 else if (optval == NULL)
358 goto e_inval;
359 else if (optlen < sizeof(struct ipv6_opt_hdr) ||
360 optlen & 0x7 || optlen > 8 * 255)
361 goto e_inval;
362
363 /* hop-by-hop / destination options are privileged option */
364 retv = -EPERM;
365 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
366 break;
367
368 opt = ipv6_renew_options(sk, np->opt, optname,
369 (struct ipv6_opt_hdr __user *)optval,
370 optlen);
371 if (IS_ERR(opt)) {
372 retv = PTR_ERR(opt);
373 break;
374 }
375
376 /* routing header option needs extra check */
377 retv = -EINVAL;
378 if (optname == IPV6_RTHDR && opt && opt->srcrt) {
379 struct ipv6_rt_hdr *rthdr = opt->srcrt;
380 switch (rthdr->type) {
381 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
382 case IPV6_SRCRT_TYPE_2:
383 if (rthdr->hdrlen != 2 ||
384 rthdr->segments_left != 1)
385 goto sticky_done;
386
387 break;
388 #endif
389 default:
390 goto sticky_done;
391 }
392 }
393
394 retv = 0;
395 opt = ipv6_update_options(sk, opt);
396 sticky_done:
397 if (opt)
398 sock_kfree_s(sk, opt, opt->tot_len);
399 break;
400 }
401
402 case IPV6_PKTINFO:
403 {
404 struct in6_pktinfo pkt;
405
406 if (optlen == 0)
407 goto e_inval;
408 else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL)
409 goto e_inval;
410
411 if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) {
412 retv = -EFAULT;
413 break;
414 }
415 if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if)
416 goto e_inval;
417
418 np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex;
419 ipv6_addr_copy(&np->sticky_pktinfo.ipi6_addr, &pkt.ipi6_addr);
420 retv = 0;
421 break;
422 }
423
424 case IPV6_2292PKTOPTIONS:
425 {
426 struct ipv6_txoptions *opt = NULL;
427 struct msghdr msg;
428 struct flowi fl;
429 int junk;
430
431 fl.fl6_flowlabel = 0;
432 fl.oif = sk->sk_bound_dev_if;
433 fl.mark = sk->sk_mark;
434
435 if (optlen == 0)
436 goto update;
437
438 /* 1K is probably excessive
439 * 1K is surely not enough, 2K per standard header is 16K.
440 */
441 retv = -EINVAL;
442 if (optlen > 64*1024)
443 break;
444
445 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
446 retv = -ENOBUFS;
447 if (opt == NULL)
448 break;
449
450 memset(opt, 0, sizeof(*opt));
451 opt->tot_len = sizeof(*opt) + optlen;
452 retv = -EFAULT;
453 if (copy_from_user(opt+1, optval, optlen))
454 goto done;
455
456 msg.msg_controllen = optlen;
457 msg.msg_control = (void*)(opt+1);
458
459 retv = datagram_send_ctl(net, &msg, &fl, opt, &junk, &junk,
460 &junk);
461 if (retv)
462 goto done;
463 update:
464 retv = 0;
465 opt = ipv6_update_options(sk, opt);
466 done:
467 if (opt)
468 sock_kfree_s(sk, opt, opt->tot_len);
469 break;
470 }
471 case IPV6_UNICAST_HOPS:
472 if (optlen < sizeof(int))
473 goto e_inval;
474 if (val > 255 || val < -1)
475 goto e_inval;
476 np->hop_limit = val;
477 retv = 0;
478 break;
479
480 case IPV6_MULTICAST_HOPS:
481 if (sk->sk_type == SOCK_STREAM)
482 break;
483 if (optlen < sizeof(int))
484 goto e_inval;
485 if (val > 255 || val < -1)
486 goto e_inval;
487 np->mcast_hops = val;
488 retv = 0;
489 break;
490
491 case IPV6_MULTICAST_LOOP:
492 if (optlen < sizeof(int))
493 goto e_inval;
494 if (val != valbool)
495 goto e_inval;
496 np->mc_loop = valbool;
497 retv = 0;
498 break;
499
500 case IPV6_MULTICAST_IF:
501 if (sk->sk_type == SOCK_STREAM)
502 break;
503 if (optlen < sizeof(int))
504 goto e_inval;
505
506 if (val) {
507 struct net_device *dev;
508
509 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
510 goto e_inval;
511
512 dev = dev_get_by_index(net, val);
513 if (!dev) {
514 retv = -ENODEV;
515 break;
516 }
517 dev_put(dev);
518 }
519 np->mcast_oif = val;
520 retv = 0;
521 break;
522 case IPV6_ADD_MEMBERSHIP:
523 case IPV6_DROP_MEMBERSHIP:
524 {
525 struct ipv6_mreq mreq;
526
527 if (optlen < sizeof(struct ipv6_mreq))
528 goto e_inval;
529
530 retv = -EPROTO;
531 if (inet_sk(sk)->is_icsk)
532 break;
533
534 retv = -EFAULT;
535 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
536 break;
537
538 if (optname == IPV6_ADD_MEMBERSHIP)
539 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
540 else
541 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
542 break;
543 }
544 case IPV6_JOIN_ANYCAST:
545 case IPV6_LEAVE_ANYCAST:
546 {
547 struct ipv6_mreq mreq;
548
549 if (optlen < sizeof(struct ipv6_mreq))
550 goto e_inval;
551
552 retv = -EFAULT;
553 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
554 break;
555
556 if (optname == IPV6_JOIN_ANYCAST)
557 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
558 else
559 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
560 break;
561 }
562 case MCAST_JOIN_GROUP:
563 case MCAST_LEAVE_GROUP:
564 {
565 struct group_req greq;
566 struct sockaddr_in6 *psin6;
567
568 if (optlen < sizeof(struct group_req))
569 goto e_inval;
570
571 retv = -EFAULT;
572 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
573 break;
574 if (greq.gr_group.ss_family != AF_INET6) {
575 retv = -EADDRNOTAVAIL;
576 break;
577 }
578 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
579 if (optname == MCAST_JOIN_GROUP)
580 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
581 &psin6->sin6_addr);
582 else
583 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
584 &psin6->sin6_addr);
585 break;
586 }
587 case MCAST_JOIN_SOURCE_GROUP:
588 case MCAST_LEAVE_SOURCE_GROUP:
589 case MCAST_BLOCK_SOURCE:
590 case MCAST_UNBLOCK_SOURCE:
591 {
592 struct group_source_req greqs;
593 int omode, add;
594
595 if (optlen < sizeof(struct group_source_req))
596 goto e_inval;
597 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
598 retv = -EFAULT;
599 break;
600 }
601 if (greqs.gsr_group.ss_family != AF_INET6 ||
602 greqs.gsr_source.ss_family != AF_INET6) {
603 retv = -EADDRNOTAVAIL;
604 break;
605 }
606 if (optname == MCAST_BLOCK_SOURCE) {
607 omode = MCAST_EXCLUDE;
608 add = 1;
609 } else if (optname == MCAST_UNBLOCK_SOURCE) {
610 omode = MCAST_EXCLUDE;
611 add = 0;
612 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
613 struct sockaddr_in6 *psin6;
614
615 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
616 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
617 &psin6->sin6_addr);
618 /* prior join w/ different source is ok */
619 if (retv && retv != -EADDRINUSE)
620 break;
621 omode = MCAST_INCLUDE;
622 add = 1;
623 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
624 omode = MCAST_INCLUDE;
625 add = 0;
626 }
627 retv = ip6_mc_source(add, omode, sk, &greqs);
628 break;
629 }
630 case MCAST_MSFILTER:
631 {
632 extern int sysctl_mld_max_msf;
633 struct group_filter *gsf;
634
635 if (optlen < GROUP_FILTER_SIZE(0))
636 goto e_inval;
637 if (optlen > sysctl_optmem_max) {
638 retv = -ENOBUFS;
639 break;
640 }
641 gsf = kmalloc(optlen,GFP_KERNEL);
642 if (!gsf) {
643 retv = -ENOBUFS;
644 break;
645 }
646 retv = -EFAULT;
647 if (copy_from_user(gsf, optval, optlen)) {
648 kfree(gsf);
649 break;
650 }
651 /* numsrc >= (4G-140)/128 overflow in 32 bits */
652 if (gsf->gf_numsrc >= 0x1ffffffU ||
653 gsf->gf_numsrc > sysctl_mld_max_msf) {
654 kfree(gsf);
655 retv = -ENOBUFS;
656 break;
657 }
658 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
659 kfree(gsf);
660 retv = -EINVAL;
661 break;
662 }
663 retv = ip6_mc_msfilter(sk, gsf);
664 kfree(gsf);
665
666 break;
667 }
668 case IPV6_ROUTER_ALERT:
669 if (optlen < sizeof(int))
670 goto e_inval;
671 retv = ip6_ra_control(sk, val);
672 break;
673 case IPV6_MTU_DISCOVER:
674 if (optlen < sizeof(int))
675 goto e_inval;
676 if (val < IP_PMTUDISC_DONT || val > IP_PMTUDISC_PROBE)
677 goto e_inval;
678 np->pmtudisc = val;
679 retv = 0;
680 break;
681 case IPV6_MTU:
682 if (optlen < sizeof(int))
683 goto e_inval;
684 if (val && val < IPV6_MIN_MTU)
685 goto e_inval;
686 np->frag_size = val;
687 retv = 0;
688 break;
689 case IPV6_RECVERR:
690 if (optlen < sizeof(int))
691 goto e_inval;
692 np->recverr = valbool;
693 if (!val)
694 skb_queue_purge(&sk->sk_error_queue);
695 retv = 0;
696 break;
697 case IPV6_FLOWINFO_SEND:
698 if (optlen < sizeof(int))
699 goto e_inval;
700 np->sndflow = valbool;
701 retv = 0;
702 break;
703 case IPV6_FLOWLABEL_MGR:
704 retv = ipv6_flowlabel_opt(sk, optval, optlen);
705 break;
706 case IPV6_IPSEC_POLICY:
707 case IPV6_XFRM_POLICY:
708 retv = -EPERM;
709 if (!capable(CAP_NET_ADMIN))
710 break;
711 retv = xfrm_user_policy(sk, optname, optval, optlen);
712 break;
713
714 case IPV6_ADDR_PREFERENCES:
715 {
716 unsigned int pref = 0;
717 unsigned int prefmask = ~0;
718
719 if (optlen < sizeof(int))
720 goto e_inval;
721
722 retv = -EINVAL;
723
724 /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */
725 switch (val & (IPV6_PREFER_SRC_PUBLIC|
726 IPV6_PREFER_SRC_TMP|
727 IPV6_PREFER_SRC_PUBTMP_DEFAULT)) {
728 case IPV6_PREFER_SRC_PUBLIC:
729 pref |= IPV6_PREFER_SRC_PUBLIC;
730 break;
731 case IPV6_PREFER_SRC_TMP:
732 pref |= IPV6_PREFER_SRC_TMP;
733 break;
734 case IPV6_PREFER_SRC_PUBTMP_DEFAULT:
735 break;
736 case 0:
737 goto pref_skip_pubtmp;
738 default:
739 goto e_inval;
740 }
741
742 prefmask &= ~(IPV6_PREFER_SRC_PUBLIC|
743 IPV6_PREFER_SRC_TMP);
744 pref_skip_pubtmp:
745
746 /* check HOME/COA conflicts */
747 switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) {
748 case IPV6_PREFER_SRC_HOME:
749 break;
750 case IPV6_PREFER_SRC_COA:
751 pref |= IPV6_PREFER_SRC_COA;
752 case 0:
753 goto pref_skip_coa;
754 default:
755 goto e_inval;
756 }
757
758 prefmask &= ~IPV6_PREFER_SRC_COA;
759 pref_skip_coa:
760
761 /* check CGA/NONCGA conflicts */
762 switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) {
763 case IPV6_PREFER_SRC_CGA:
764 case IPV6_PREFER_SRC_NONCGA:
765 case 0:
766 break;
767 default:
768 goto e_inval;
769 }
770
771 np->srcprefs = (np->srcprefs & prefmask) | pref;
772 retv = 0;
773
774 break;
775 }
776 case IPV6_MINHOPCOUNT:
777 if (optlen < sizeof(int))
778 goto e_inval;
779 if (val < 0 || val > 255)
780 goto e_inval;
781 np->min_hopcount = val;
782 break;
783 case IPV6_DONTFRAG:
784 np->dontfrag = valbool;
785 retv = 0;
786 break;
787 }
788
789 release_sock(sk);
790
791 return retv;
792
793 e_inval:
794 release_sock(sk);
795 return -EINVAL;
796 }
797
798 int ipv6_setsockopt(struct sock *sk, int level, int optname,
799 char __user *optval, unsigned int optlen)
800 {
801 int err;
802
803 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
804 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
805
806 if (level != SOL_IPV6)
807 return -ENOPROTOOPT;
808
809 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
810 #ifdef CONFIG_NETFILTER
811 /* we need to exclude all possible ENOPROTOOPTs except default case */
812 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
813 optname != IPV6_XFRM_POLICY) {
814 lock_sock(sk);
815 err = nf_setsockopt(sk, PF_INET6, optname, optval,
816 optlen);
817 release_sock(sk);
818 }
819 #endif
820 return err;
821 }
822
823 EXPORT_SYMBOL(ipv6_setsockopt);
824
825 #ifdef CONFIG_COMPAT
826 int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
827 char __user *optval, unsigned int optlen)
828 {
829 int err;
830
831 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
832 if (udp_prot.compat_setsockopt != NULL)
833 return udp_prot.compat_setsockopt(sk, level, optname,
834 optval, optlen);
835 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
836 }
837
838 if (level != SOL_IPV6)
839 return -ENOPROTOOPT;
840
841 if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER)
842 return compat_mc_setsockopt(sk, level, optname, optval, optlen,
843 ipv6_setsockopt);
844
845 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
846 #ifdef CONFIG_NETFILTER
847 /* we need to exclude all possible ENOPROTOOPTs except default case */
848 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
849 optname != IPV6_XFRM_POLICY) {
850 lock_sock(sk);
851 err = compat_nf_setsockopt(sk, PF_INET6, optname,
852 optval, optlen);
853 release_sock(sk);
854 }
855 #endif
856 return err;
857 }
858
859 EXPORT_SYMBOL(compat_ipv6_setsockopt);
860 #endif
861
862 static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
863 int optname, char __user *optval, int len)
864 {
865 struct ipv6_opt_hdr *hdr;
866
867 if (!opt)
868 return 0;
869
870 switch(optname) {
871 case IPV6_HOPOPTS:
872 hdr = opt->hopopt;
873 break;
874 case IPV6_RTHDRDSTOPTS:
875 hdr = opt->dst0opt;
876 break;
877 case IPV6_RTHDR:
878 hdr = (struct ipv6_opt_hdr *)opt->srcrt;
879 break;
880 case IPV6_DSTOPTS:
881 hdr = opt->dst1opt;
882 break;
883 default:
884 return -EINVAL; /* should not happen */
885 }
886
887 if (!hdr)
888 return 0;
889
890 len = min_t(unsigned int, len, ipv6_optlen(hdr));
891 if (copy_to_user(optval, hdr, len))
892 return -EFAULT;
893 return len;
894 }
895
896 static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
897 char __user *optval, int __user *optlen)
898 {
899 struct ipv6_pinfo *np = inet6_sk(sk);
900 int len;
901 int val;
902
903 if (ip6_mroute_opt(optname))
904 return ip6_mroute_getsockopt(sk, optname, optval, optlen);
905
906 if (get_user(len, optlen))
907 return -EFAULT;
908 switch (optname) {
909 case IPV6_ADDRFORM:
910 if (sk->sk_protocol != IPPROTO_UDP &&
911 sk->sk_protocol != IPPROTO_UDPLITE &&
912 sk->sk_protocol != IPPROTO_TCP)
913 return -ENOPROTOOPT;
914 if (sk->sk_state != TCP_ESTABLISHED)
915 return -ENOTCONN;
916 val = sk->sk_family;
917 break;
918 case MCAST_MSFILTER:
919 {
920 struct group_filter gsf;
921 int err;
922
923 if (len < GROUP_FILTER_SIZE(0))
924 return -EINVAL;
925 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
926 return -EFAULT;
927 if (gsf.gf_group.ss_family != AF_INET6)
928 return -EADDRNOTAVAIL;
929 lock_sock(sk);
930 err = ip6_mc_msfget(sk, &gsf,
931 (struct group_filter __user *)optval, optlen);
932 release_sock(sk);
933 return err;
934 }
935
936 case IPV6_2292PKTOPTIONS:
937 {
938 struct msghdr msg;
939 struct sk_buff *skb;
940
941 if (sk->sk_type != SOCK_STREAM)
942 return -ENOPROTOOPT;
943
944 msg.msg_control = optval;
945 msg.msg_controllen = len;
946 msg.msg_flags = 0;
947
948 lock_sock(sk);
949 skb = np->pktoptions;
950 if (skb)
951 atomic_inc(&skb->users);
952 release_sock(sk);
953
954 if (skb) {
955 int err = datagram_recv_ctl(sk, &msg, skb);
956 kfree_skb(skb);
957 if (err)
958 return err;
959 } else {
960 if (np->rxopt.bits.rxinfo) {
961 struct in6_pktinfo src_info;
962 src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif :
963 np->sticky_pktinfo.ipi6_ifindex;
964 np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) :
965 ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr));
966 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
967 }
968 if (np->rxopt.bits.rxhlim) {
969 int hlim = np->mcast_hops;
970 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
971 }
972 if (np->rxopt.bits.rxoinfo) {
973 struct in6_pktinfo src_info;
974 src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif :
975 np->sticky_pktinfo.ipi6_ifindex;
976 np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) :
977 ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr));
978 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
979 }
980 if (np->rxopt.bits.rxohlim) {
981 int hlim = np->mcast_hops;
982 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
983 }
984 }
985 len -= msg.msg_controllen;
986 return put_user(len, optlen);
987 }
988 case IPV6_MTU:
989 {
990 struct dst_entry *dst;
991
992 val = 0;
993 rcu_read_lock();
994 dst = __sk_dst_get(sk);
995 if (dst)
996 val = dst_mtu(dst);
997 rcu_read_unlock();
998 if (!val)
999 return -ENOTCONN;
1000 break;
1001 }
1002
1003 case IPV6_V6ONLY:
1004 val = np->ipv6only;
1005 break;
1006
1007 case IPV6_RECVPKTINFO:
1008 val = np->rxopt.bits.rxinfo;
1009 break;
1010
1011 case IPV6_2292PKTINFO:
1012 val = np->rxopt.bits.rxoinfo;
1013 break;
1014
1015 case IPV6_RECVHOPLIMIT:
1016 val = np->rxopt.bits.rxhlim;
1017 break;
1018
1019 case IPV6_2292HOPLIMIT:
1020 val = np->rxopt.bits.rxohlim;
1021 break;
1022
1023 case IPV6_RECVRTHDR:
1024 val = np->rxopt.bits.srcrt;
1025 break;
1026
1027 case IPV6_2292RTHDR:
1028 val = np->rxopt.bits.osrcrt;
1029 break;
1030
1031 case IPV6_HOPOPTS:
1032 case IPV6_RTHDRDSTOPTS:
1033 case IPV6_RTHDR:
1034 case IPV6_DSTOPTS:
1035 {
1036
1037 lock_sock(sk);
1038 len = ipv6_getsockopt_sticky(sk, np->opt,
1039 optname, optval, len);
1040 release_sock(sk);
1041 /* check if ipv6_getsockopt_sticky() returns err code */
1042 if (len < 0)
1043 return len;
1044 return put_user(len, optlen);
1045 }
1046
1047 case IPV6_RECVHOPOPTS:
1048 val = np->rxopt.bits.hopopts;
1049 break;
1050
1051 case IPV6_2292HOPOPTS:
1052 val = np->rxopt.bits.ohopopts;
1053 break;
1054
1055 case IPV6_RECVDSTOPTS:
1056 val = np->rxopt.bits.dstopts;
1057 break;
1058
1059 case IPV6_2292DSTOPTS:
1060 val = np->rxopt.bits.odstopts;
1061 break;
1062
1063 case IPV6_TCLASS:
1064 val = np->tclass;
1065 break;
1066
1067 case IPV6_RECVTCLASS:
1068 val = np->rxopt.bits.rxtclass;
1069 break;
1070
1071 case IPV6_FLOWINFO:
1072 val = np->rxopt.bits.rxflow;
1073 break;
1074
1075 case IPV6_RECVPATHMTU:
1076 val = np->rxopt.bits.rxpmtu;
1077 break;
1078
1079 case IPV6_PATHMTU:
1080 {
1081 struct dst_entry *dst;
1082 struct ip6_mtuinfo mtuinfo;
1083
1084 if (len < sizeof(mtuinfo))
1085 return -EINVAL;
1086
1087 len = sizeof(mtuinfo);
1088 memset(&mtuinfo, 0, sizeof(mtuinfo));
1089
1090 rcu_read_lock();
1091 dst = __sk_dst_get(sk);
1092 if (dst)
1093 mtuinfo.ip6m_mtu = dst_mtu(dst);
1094 rcu_read_unlock();
1095 if (!mtuinfo.ip6m_mtu)
1096 return -ENOTCONN;
1097
1098 if (put_user(len, optlen))
1099 return -EFAULT;
1100 if (copy_to_user(optval, &mtuinfo, len))
1101 return -EFAULT;
1102
1103 return 0;
1104 break;
1105 }
1106
1107 case IPV6_UNICAST_HOPS:
1108 case IPV6_MULTICAST_HOPS:
1109 {
1110 struct dst_entry *dst;
1111
1112 if (optname == IPV6_UNICAST_HOPS)
1113 val = np->hop_limit;
1114 else
1115 val = np->mcast_hops;
1116
1117 if (val < 0) {
1118 rcu_read_lock();
1119 dst = __sk_dst_get(sk);
1120 if (dst)
1121 val = ip6_dst_hoplimit(dst);
1122 rcu_read_unlock();
1123 }
1124
1125 if (val < 0)
1126 val = sock_net(sk)->ipv6.devconf_all->hop_limit;
1127 break;
1128 }
1129
1130 case IPV6_MULTICAST_LOOP:
1131 val = np->mc_loop;
1132 break;
1133
1134 case IPV6_MULTICAST_IF:
1135 val = np->mcast_oif;
1136 break;
1137
1138 case IPV6_MTU_DISCOVER:
1139 val = np->pmtudisc;
1140 break;
1141
1142 case IPV6_RECVERR:
1143 val = np->recverr;
1144 break;
1145
1146 case IPV6_FLOWINFO_SEND:
1147 val = np->sndflow;
1148 break;
1149
1150 case IPV6_ADDR_PREFERENCES:
1151 val = 0;
1152
1153 if (np->srcprefs & IPV6_PREFER_SRC_TMP)
1154 val |= IPV6_PREFER_SRC_TMP;
1155 else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC)
1156 val |= IPV6_PREFER_SRC_PUBLIC;
1157 else {
1158 /* XXX: should we return system default? */
1159 val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT;
1160 }
1161
1162 if (np->srcprefs & IPV6_PREFER_SRC_COA)
1163 val |= IPV6_PREFER_SRC_COA;
1164 else
1165 val |= IPV6_PREFER_SRC_HOME;
1166 break;
1167
1168 case IPV6_MINHOPCOUNT:
1169 val = np->min_hopcount;
1170 break;
1171
1172 case IPV6_DONTFRAG:
1173 val = np->dontfrag;
1174 break;
1175
1176 default:
1177 return -ENOPROTOOPT;
1178 }
1179 len = min_t(unsigned int, sizeof(int), len);
1180 if(put_user(len, optlen))
1181 return -EFAULT;
1182 if(copy_to_user(optval,&val,len))
1183 return -EFAULT;
1184 return 0;
1185 }
1186
1187 int ipv6_getsockopt(struct sock *sk, int level, int optname,
1188 char __user *optval, int __user *optlen)
1189 {
1190 int err;
1191
1192 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
1193 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1194
1195 if(level != SOL_IPV6)
1196 return -ENOPROTOOPT;
1197
1198 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1199 #ifdef CONFIG_NETFILTER
1200 /* we need to exclude all possible ENOPROTOOPTs except default case */
1201 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
1202 int len;
1203
1204 if (get_user(len, optlen))
1205 return -EFAULT;
1206
1207 lock_sock(sk);
1208 err = nf_getsockopt(sk, PF_INET6, optname, optval,
1209 &len);
1210 release_sock(sk);
1211 if (err >= 0)
1212 err = put_user(len, optlen);
1213 }
1214 #endif
1215 return err;
1216 }
1217
1218 EXPORT_SYMBOL(ipv6_getsockopt);
1219
1220 #ifdef CONFIG_COMPAT
1221 int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
1222 char __user *optval, int __user *optlen)
1223 {
1224 int err;
1225
1226 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
1227 if (udp_prot.compat_getsockopt != NULL)
1228 return udp_prot.compat_getsockopt(sk, level, optname,
1229 optval, optlen);
1230 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1231 }
1232
1233 if (level != SOL_IPV6)
1234 return -ENOPROTOOPT;
1235
1236 if (optname == MCAST_MSFILTER)
1237 return compat_mc_getsockopt(sk, level, optname, optval, optlen,
1238 ipv6_getsockopt);
1239
1240 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1241 #ifdef CONFIG_NETFILTER
1242 /* we need to exclude all possible ENOPROTOOPTs except default case */
1243 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
1244 int len;
1245
1246 if (get_user(len, optlen))
1247 return -EFAULT;
1248
1249 lock_sock(sk);
1250 err = compat_nf_getsockopt(sk, PF_INET6,
1251 optname, optval, &len);
1252 release_sock(sk);
1253 if (err >= 0)
1254 err = put_user(len, optlen);
1255 }
1256 #endif
1257 return err;
1258 }
1259
1260 EXPORT_SYMBOL(compat_ipv6_getsockopt);
1261 #endif
1262
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree