?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
IPv6: Add dontfrag argument to relevant functions
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / ipv6 / ipv6_sockglue.c
blobbd43f0152c21d5e7f5dca9b609a735d1a0573bac
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 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly;
59
60 struct ip6_ra_chain *ip6_ra_chain;
61 DEFINE_RWLOCK(ip6_ra_lock);
62
63 int ip6_ra_control(struct sock *sk, int sel)
64 {
65 struct ip6_ra_chain *ra, *new_ra, **rap;
66
67 /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
68 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num != IPPROTO_RAW)
69 return -ENOPROTOOPT;
70
71 new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
72
73 write_lock_bh(&ip6_ra_lock);
74 for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
75 if (ra->sk == sk) {
76 if (sel>=0) {
77 write_unlock_bh(&ip6_ra_lock);
78 kfree(new_ra);
79 return -EADDRINUSE;
80 }
81
82 *rap = ra->next;
83 write_unlock_bh(&ip6_ra_lock);
84
85 sock_put(sk);
86 kfree(ra);
87 return 0;
88 }
89 }
90 if (new_ra == NULL) {
91 write_unlock_bh(&ip6_ra_lock);
92 return -ENOBUFS;
93 }
94 new_ra->sk = sk;
95 new_ra->sel = sel;
96 new_ra->next = ra;
97 *rap = new_ra;
98 sock_hold(sk);
99 write_unlock_bh(&ip6_ra_lock);
100 return 0;
101 }
102
103 static
104 struct ipv6_txoptions *ipv6_update_options(struct sock *sk,
105 struct ipv6_txoptions *opt)
106 {
107 if (inet_sk(sk)->is_icsk) {
108 if (opt &&
109 !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
110 inet_sk(sk)->inet_daddr != LOOPBACK4_IPV6) {
111 struct inet_connection_sock *icsk = inet_csk(sk);
112 icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen;
113 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
114 }
115 opt = xchg(&inet6_sk(sk)->opt, opt);
116 } else {
117 spin_lock(&sk->sk_dst_lock);
118 opt = xchg(&inet6_sk(sk)->opt, opt);
119 spin_unlock(&sk->sk_dst_lock);
120 }
121 sk_dst_reset(sk);
122
123 return opt;
124 }
125
126 static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
127 char __user *optval, unsigned int optlen)
128 {
129 struct ipv6_pinfo *np = inet6_sk(sk);
130 struct net *net = sock_net(sk);
131 int val, valbool;
132 int retv = -ENOPROTOOPT;
133
134 if (optval == NULL)
135 val=0;
136 else {
137 if (optlen >= sizeof(int)) {
138 if (get_user(val, (int __user *) optval))
139 return -EFAULT;
140 } else
141 val = 0;
142 }
143
144 valbool = (val!=0);
145
146 if (ip6_mroute_opt(optname))
147 return ip6_mroute_setsockopt(sk, optname, optval, optlen);
148
149 lock_sock(sk);
150
151 switch (optname) {
152
153 case IPV6_ADDRFORM:
154 if (optlen < sizeof(int))
155 goto e_inval;
156 if (val == PF_INET) {
157 struct ipv6_txoptions *opt;
158 struct sk_buff *pktopt;
159
160 if (sk->sk_type == SOCK_RAW)
161 break;
162
163 if (sk->sk_protocol == IPPROTO_UDP ||
164 sk->sk_protocol == IPPROTO_UDPLITE) {
165 struct udp_sock *up = udp_sk(sk);
166 if (up->pending == AF_INET6) {
167 retv = -EBUSY;
168 break;
169 }
170 } else if (sk->sk_protocol != IPPROTO_TCP)
171 break;
172
173 if (sk->sk_state != TCP_ESTABLISHED) {
174 retv = -ENOTCONN;
175 break;
176 }
177
178 if (ipv6_only_sock(sk) ||
179 !ipv6_addr_v4mapped(&np->daddr)) {
180 retv = -EADDRNOTAVAIL;
181 break;
182 }
183
184 fl6_free_socklist(sk);
185 ipv6_sock_mc_close(sk);
186
187 /*
188 * Sock is moving from IPv6 to IPv4 (sk_prot), so
189 * remove it from the refcnt debug socks count in the
190 * original family...
191 */
192 sk_refcnt_debug_dec(sk);
193
194 if (sk->sk_protocol == IPPROTO_TCP) {
195 struct inet_connection_sock *icsk = inet_csk(sk);
196 local_bh_disable();
197 sock_prot_inuse_add(net, sk->sk_prot, -1);
198 sock_prot_inuse_add(net, &tcp_prot, 1);
199 local_bh_enable();
200 sk->sk_prot = &tcp_prot;
201 icsk->icsk_af_ops = &ipv4_specific;
202 sk->sk_socket->ops = &inet_stream_ops;
203 sk->sk_family = PF_INET;
204 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
205 } else {
206 struct proto *prot = &udp_prot;
207
208 if (sk->sk_protocol == IPPROTO_UDPLITE)
209 prot = &udplite_prot;
210 local_bh_disable();
211 sock_prot_inuse_add(net, sk->sk_prot, -1);
212 sock_prot_inuse_add(net, prot, 1);
213 local_bh_enable();
214 sk->sk_prot = prot;
215 sk->sk_socket->ops = &inet_dgram_ops;
216 sk->sk_family = PF_INET;
217 }
218 opt = xchg(&np->opt, NULL);
219 if (opt)
220 sock_kfree_s(sk, opt, opt->tot_len);
221 pktopt = xchg(&np->pktoptions, NULL);
222 kfree_skb(pktopt);
223
224 sk->sk_destruct = inet_sock_destruct;
225 /*
226 * ... and add it to the refcnt debug socks count
227 * in the new family. -acme
228 */
229 sk_refcnt_debug_inc(sk);
230 module_put(THIS_MODULE);
231 retv = 0;
232 break;
233 }
234 goto e_inval;
235
236 case IPV6_V6ONLY:
237 if (optlen < sizeof(int) ||
238 inet_sk(sk)->inet_num)
239 goto e_inval;
240 np->ipv6only = valbool;
241 retv = 0;
242 break;
243
244 case IPV6_RECVPKTINFO:
245 if (optlen < sizeof(int))
246 goto e_inval;
247 np->rxopt.bits.rxinfo = valbool;
248 retv = 0;
249 break;
250
251 case IPV6_2292PKTINFO:
252 if (optlen < sizeof(int))
253 goto e_inval;
254 np->rxopt.bits.rxoinfo = valbool;
255 retv = 0;
256 break;
257
258 case IPV6_RECVHOPLIMIT:
259 if (optlen < sizeof(int))
260 goto e_inval;
261 np->rxopt.bits.rxhlim = valbool;
262 retv = 0;
263 break;
264
265 case IPV6_2292HOPLIMIT:
266 if (optlen < sizeof(int))
267 goto e_inval;
268 np->rxopt.bits.rxohlim = valbool;
269 retv = 0;
270 break;
271
272 case IPV6_RECVRTHDR:
273 if (optlen < sizeof(int))
274 goto e_inval;
275 np->rxopt.bits.srcrt = valbool;
276 retv = 0;
277 break;
278
279 case IPV6_2292RTHDR:
280 if (optlen < sizeof(int))
281 goto e_inval;
282 np->rxopt.bits.osrcrt = valbool;
283 retv = 0;
284 break;
285
286 case IPV6_RECVHOPOPTS:
287 if (optlen < sizeof(int))
288 goto e_inval;
289 np->rxopt.bits.hopopts = valbool;
290 retv = 0;
291 break;
292
293 case IPV6_2292HOPOPTS:
294 if (optlen < sizeof(int))
295 goto e_inval;
296 np->rxopt.bits.ohopopts = valbool;
297 retv = 0;
298 break;
299
300 case IPV6_RECVDSTOPTS:
301 if (optlen < sizeof(int))
302 goto e_inval;
303 np->rxopt.bits.dstopts = valbool;
304 retv = 0;
305 break;
306
307 case IPV6_2292DSTOPTS:
308 if (optlen < sizeof(int))
309 goto e_inval;
310 np->rxopt.bits.odstopts = valbool;
311 retv = 0;
312 break;
313
314 case IPV6_TCLASS:
315 if (optlen < sizeof(int))
316 goto e_inval;
317 if (val < -1 || val > 0xff)
318 goto e_inval;
319 /* RFC 3542, 6.5: default traffic class of 0x0 */
320 if (val == -1)
321 val = 0;
322 np->tclass = val;
323 retv = 0;
324 break;
325
326 case IPV6_RECVTCLASS:
327 if (optlen < sizeof(int))
328 goto e_inval;
329 np->rxopt.bits.rxtclass = valbool;
330 retv = 0;
331 break;
332
333 case IPV6_FLOWINFO:
334 if (optlen < sizeof(int))
335 goto e_inval;
336 np->rxopt.bits.rxflow = valbool;
337 retv = 0;
338 break;
339
340 case IPV6_RECVPATHMTU:
341 if (optlen < sizeof(int))
342 goto e_inval;
343 np->rxopt.bits.rxpmtu = valbool;
344 retv = 0;
345 break;
346
347 case IPV6_HOPOPTS:
348 case IPV6_RTHDRDSTOPTS:
349 case IPV6_RTHDR:
350 case IPV6_DSTOPTS:
351 {
352 struct ipv6_txoptions *opt;
353
354 /* remove any sticky options header with a zero option
355 * length, per RFC3542.
356 */
357 if (optlen == 0)
358 optval = NULL;
359 else if (optval == NULL)
360 goto e_inval;
361 else if (optlen < sizeof(struct ipv6_opt_hdr) ||
362 optlen & 0x7 || optlen > 8 * 255)
363 goto e_inval;
364
365 /* hop-by-hop / destination options are privileged option */
366 retv = -EPERM;
367 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
368 break;
369
370 opt = ipv6_renew_options(sk, np->opt, optname,
371 (struct ipv6_opt_hdr __user *)optval,
372 optlen);
373 if (IS_ERR(opt)) {
374 retv = PTR_ERR(opt);
375 break;
376 }
377
378 /* routing header option needs extra check */
379 retv = -EINVAL;
380 if (optname == IPV6_RTHDR && opt && opt->srcrt) {
381 struct ipv6_rt_hdr *rthdr = opt->srcrt;
382 switch (rthdr->type) {
383 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
384 case IPV6_SRCRT_TYPE_2:
385 if (rthdr->hdrlen != 2 ||
386 rthdr->segments_left != 1)
387 goto sticky_done;
388
389 break;
390 #endif
391 default:
392 goto sticky_done;
393 }
394 }
395
396 retv = 0;
397 opt = ipv6_update_options(sk, opt);
398 sticky_done:
399 if (opt)
400 sock_kfree_s(sk, opt, opt->tot_len);
401 break;
402 }
403
404 case IPV6_PKTINFO:
405 {
406 struct in6_pktinfo pkt;
407
408 if (optlen == 0)
409 goto e_inval;
410 else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL)
411 goto e_inval;
412
413 if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) {
414 retv = -EFAULT;
415 break;
416 }
417 if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if)
418 goto e_inval;
419
420 np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex;
421 ipv6_addr_copy(&np->sticky_pktinfo.ipi6_addr, &pkt.ipi6_addr);
422 retv = 0;
423 break;
424 }
425
426 case IPV6_2292PKTOPTIONS:
427 {
428 struct ipv6_txoptions *opt = NULL;
429 struct msghdr msg;
430 struct flowi fl;
431 int junk;
432
433 fl.fl6_flowlabel = 0;
434 fl.oif = sk->sk_bound_dev_if;
435 fl.mark = sk->sk_mark;
436
437 if (optlen == 0)
438 goto update;
439
440 /* 1K is probably excessive
441 * 1K is surely not enough, 2K per standard header is 16K.
442 */
443 retv = -EINVAL;
444 if (optlen > 64*1024)
445 break;
446
447 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
448 retv = -ENOBUFS;
449 if (opt == NULL)
450 break;
451
452 memset(opt, 0, sizeof(*opt));
453 opt->tot_len = sizeof(*opt) + optlen;
454 retv = -EFAULT;
455 if (copy_from_user(opt+1, optval, optlen))
456 goto done;
457
458 msg.msg_controllen = optlen;
459 msg.msg_control = (void*)(opt+1);
460
461 retv = datagram_send_ctl(net, &msg, &fl, opt, &junk, &junk,
462 &junk);
463 if (retv)
464 goto done;
465 update:
466 retv = 0;
467 opt = ipv6_update_options(sk, opt);
468 done:
469 if (opt)
470 sock_kfree_s(sk, opt, opt->tot_len);
471 break;
472 }
473 case IPV6_UNICAST_HOPS:
474 if (optlen < sizeof(int))
475 goto e_inval;
476 if (val > 255 || val < -1)
477 goto e_inval;
478 np->hop_limit = val;
479 retv = 0;
480 break;
481
482 case IPV6_MULTICAST_HOPS:
483 if (sk->sk_type == SOCK_STREAM)
484 break;
485 if (optlen < sizeof(int))
486 goto e_inval;
487 if (val > 255 || val < -1)
488 goto e_inval;
489 np->mcast_hops = val;
490 retv = 0;
491 break;
492
493 case IPV6_MULTICAST_LOOP:
494 if (optlen < sizeof(int))
495 goto e_inval;
496 if (val != valbool)
497 goto e_inval;
498 np->mc_loop = valbool;
499 retv = 0;
500 break;
501
502 case IPV6_MULTICAST_IF:
503 if (sk->sk_type == SOCK_STREAM)
504 break;
505 if (optlen < sizeof(int))
506 goto e_inval;
507
508 if (val) {
509 struct net_device *dev;
510
511 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
512 goto e_inval;
513
514 dev = dev_get_by_index(net, val);
515 if (!dev) {
516 retv = -ENODEV;
517 break;
518 }
519 dev_put(dev);
520 }
521 np->mcast_oif = val;
522 retv = 0;
523 break;
524 case IPV6_ADD_MEMBERSHIP:
525 case IPV6_DROP_MEMBERSHIP:
526 {
527 struct ipv6_mreq mreq;
528
529 if (optlen < sizeof(struct ipv6_mreq))
530 goto e_inval;
531
532 retv = -EPROTO;
533 if (inet_sk(sk)->is_icsk)
534 break;
535
536 retv = -EFAULT;
537 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
538 break;
539
540 if (optname == IPV6_ADD_MEMBERSHIP)
541 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
542 else
543 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
544 break;
545 }
546 case IPV6_JOIN_ANYCAST:
547 case IPV6_LEAVE_ANYCAST:
548 {
549 struct ipv6_mreq mreq;
550
551 if (optlen < sizeof(struct ipv6_mreq))
552 goto e_inval;
553
554 retv = -EFAULT;
555 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
556 break;
557
558 if (optname == IPV6_JOIN_ANYCAST)
559 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
560 else
561 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
562 break;
563 }
564 case MCAST_JOIN_GROUP:
565 case MCAST_LEAVE_GROUP:
566 {
567 struct group_req greq;
568 struct sockaddr_in6 *psin6;
569
570 if (optlen < sizeof(struct group_req))
571 goto e_inval;
572
573 retv = -EFAULT;
574 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
575 break;
576 if (greq.gr_group.ss_family != AF_INET6) {
577 retv = -EADDRNOTAVAIL;
578 break;
579 }
580 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
581 if (optname == MCAST_JOIN_GROUP)
582 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
583 &psin6->sin6_addr);
584 else
585 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
586 &psin6->sin6_addr);
587 break;
588 }
589 case MCAST_JOIN_SOURCE_GROUP:
590 case MCAST_LEAVE_SOURCE_GROUP:
591 case MCAST_BLOCK_SOURCE:
592 case MCAST_UNBLOCK_SOURCE:
593 {
594 struct group_source_req greqs;
595 int omode, add;
596
597 if (optlen < sizeof(struct group_source_req))
598 goto e_inval;
599 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
600 retv = -EFAULT;
601 break;
602 }
603 if (greqs.gsr_group.ss_family != AF_INET6 ||
604 greqs.gsr_source.ss_family != AF_INET6) {
605 retv = -EADDRNOTAVAIL;
606 break;
607 }
608 if (optname == MCAST_BLOCK_SOURCE) {
609 omode = MCAST_EXCLUDE;
610 add = 1;
611 } else if (optname == MCAST_UNBLOCK_SOURCE) {
612 omode = MCAST_EXCLUDE;
613 add = 0;
614 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
615 struct sockaddr_in6 *psin6;
616
617 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
618 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
619 &psin6->sin6_addr);
620 /* prior join w/ different source is ok */
621 if (retv && retv != -EADDRINUSE)
622 break;
623 omode = MCAST_INCLUDE;
624 add = 1;
625 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
626 omode = MCAST_INCLUDE;
627 add = 0;
628 }
629 retv = ip6_mc_source(add, omode, sk, &greqs);
630 break;
631 }
632 case MCAST_MSFILTER:
633 {
634 extern int sysctl_mld_max_msf;
635 struct group_filter *gsf;
636
637 if (optlen < GROUP_FILTER_SIZE(0))
638 goto e_inval;
639 if (optlen > sysctl_optmem_max) {
640 retv = -ENOBUFS;
641 break;
642 }
643 gsf = kmalloc(optlen,GFP_KERNEL);
644 if (!gsf) {
645 retv = -ENOBUFS;
646 break;
647 }
648 retv = -EFAULT;
649 if (copy_from_user(gsf, optval, optlen)) {
650 kfree(gsf);
651 break;
652 }
653 /* numsrc >= (4G-140)/128 overflow in 32 bits */
654 if (gsf->gf_numsrc >= 0x1ffffffU ||
655 gsf->gf_numsrc > sysctl_mld_max_msf) {
656 kfree(gsf);
657 retv = -ENOBUFS;
658 break;
659 }
660 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
661 kfree(gsf);
662 retv = -EINVAL;
663 break;
664 }
665 retv = ip6_mc_msfilter(sk, gsf);
666 kfree(gsf);
667
668 break;
669 }
670 case IPV6_ROUTER_ALERT:
671 if (optlen < sizeof(int))
672 goto e_inval;
673 retv = ip6_ra_control(sk, val);
674 break;
675 case IPV6_MTU_DISCOVER:
676 if (optlen < sizeof(int))
677 goto e_inval;
678 if (val < IP_PMTUDISC_DONT || val > IP_PMTUDISC_PROBE)
679 goto e_inval;
680 np->pmtudisc = val;
681 retv = 0;
682 break;
683 case IPV6_MTU:
684 if (optlen < sizeof(int))
685 goto e_inval;
686 if (val && val < IPV6_MIN_MTU)
687 goto e_inval;
688 np->frag_size = val;
689 retv = 0;
690 break;
691 case IPV6_RECVERR:
692 if (optlen < sizeof(int))
693 goto e_inval;
694 np->recverr = valbool;
695 if (!val)
696 skb_queue_purge(&sk->sk_error_queue);
697 retv = 0;
698 break;
699 case IPV6_FLOWINFO_SEND:
700 if (optlen < sizeof(int))
701 goto e_inval;
702 np->sndflow = valbool;
703 retv = 0;
704 break;
705 case IPV6_FLOWLABEL_MGR:
706 retv = ipv6_flowlabel_opt(sk, optval, optlen);
707 break;
708 case IPV6_IPSEC_POLICY:
709 case IPV6_XFRM_POLICY:
710 retv = -EPERM;
711 if (!capable(CAP_NET_ADMIN))
712 break;
713 retv = xfrm_user_policy(sk, optname, optval, optlen);
714 break;
715
716 case IPV6_ADDR_PREFERENCES:
717 {
718 unsigned int pref = 0;
719 unsigned int prefmask = ~0;
720
721 if (optlen < sizeof(int))
722 goto e_inval;
723
724 retv = -EINVAL;
725
726 /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */
727 switch (val & (IPV6_PREFER_SRC_PUBLIC|
728 IPV6_PREFER_SRC_TMP|
729 IPV6_PREFER_SRC_PUBTMP_DEFAULT)) {
730 case IPV6_PREFER_SRC_PUBLIC:
731 pref |= IPV6_PREFER_SRC_PUBLIC;
732 break;
733 case IPV6_PREFER_SRC_TMP:
734 pref |= IPV6_PREFER_SRC_TMP;
735 break;
736 case IPV6_PREFER_SRC_PUBTMP_DEFAULT:
737 break;
738 case 0:
739 goto pref_skip_pubtmp;
740 default:
741 goto e_inval;
742 }
743
744 prefmask &= ~(IPV6_PREFER_SRC_PUBLIC|
745 IPV6_PREFER_SRC_TMP);
746 pref_skip_pubtmp:
747
748 /* check HOME/COA conflicts */
749 switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) {
750 case IPV6_PREFER_SRC_HOME:
751 break;
752 case IPV6_PREFER_SRC_COA:
753 pref |= IPV6_PREFER_SRC_COA;
754 case 0:
755 goto pref_skip_coa;
756 default:
757 goto e_inval;
758 }
759
760 prefmask &= ~IPV6_PREFER_SRC_COA;
761 pref_skip_coa:
762
763 /* check CGA/NONCGA conflicts */
764 switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) {
765 case IPV6_PREFER_SRC_CGA:
766 case IPV6_PREFER_SRC_NONCGA:
767 case 0:
768 break;
769 default:
770 goto e_inval;
771 }
772
773 np->srcprefs = (np->srcprefs & prefmask) | pref;
774 retv = 0;
775
776 break;
777 }
778 case IPV6_MINHOPCOUNT:
779 if (optlen < sizeof(int))
780 goto e_inval;
781 if (val < 0 || val > 255)
782 goto e_inval;
783 np->min_hopcount = val;
784 break;
785 case IPV6_DONTFRAG:
786 np->dontfrag = valbool;
787 retv = 0;
788 break;
789 }
790
791 release_sock(sk);
792
793 return retv;
794
795 e_inval:
796 release_sock(sk);
797 return -EINVAL;
798 }
799
800 int ipv6_setsockopt(struct sock *sk, int level, int optname,
801 char __user *optval, unsigned int optlen)
802 {
803 int err;
804
805 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
806 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
807
808 if (level != SOL_IPV6)
809 return -ENOPROTOOPT;
810
811 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
812 #ifdef CONFIG_NETFILTER
813 /* we need to exclude all possible ENOPROTOOPTs except default case */
814 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
815 optname != IPV6_XFRM_POLICY) {
816 lock_sock(sk);
817 err = nf_setsockopt(sk, PF_INET6, optname, optval,
818 optlen);
819 release_sock(sk);
820 }
821 #endif
822 return err;
823 }
824
825 EXPORT_SYMBOL(ipv6_setsockopt);
826
827 #ifdef CONFIG_COMPAT
828 int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
829 char __user *optval, unsigned int optlen)
830 {
831 int err;
832
833 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
834 if (udp_prot.compat_setsockopt != NULL)
835 return udp_prot.compat_setsockopt(sk, level, optname,
836 optval, optlen);
837 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
838 }
839
840 if (level != SOL_IPV6)
841 return -ENOPROTOOPT;
842
843 if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER)
844 return compat_mc_setsockopt(sk, level, optname, optval, optlen,
845 ipv6_setsockopt);
846
847 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
848 #ifdef CONFIG_NETFILTER
849 /* we need to exclude all possible ENOPROTOOPTs except default case */
850 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
851 optname != IPV6_XFRM_POLICY) {
852 lock_sock(sk);
853 err = compat_nf_setsockopt(sk, PF_INET6, optname,
854 optval, optlen);
855 release_sock(sk);
856 }
857 #endif
858 return err;
859 }
860
861 EXPORT_SYMBOL(compat_ipv6_setsockopt);
862 #endif
863
864 static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
865 int optname, char __user *optval, int len)
866 {
867 struct ipv6_opt_hdr *hdr;
868
869 if (!opt)
870 return 0;
871
872 switch(optname) {
873 case IPV6_HOPOPTS:
874 hdr = opt->hopopt;
875 break;
876 case IPV6_RTHDRDSTOPTS:
877 hdr = opt->dst0opt;
878 break;
879 case IPV6_RTHDR:
880 hdr = (struct ipv6_opt_hdr *)opt->srcrt;
881 break;
882 case IPV6_DSTOPTS:
883 hdr = opt->dst1opt;
884 break;
885 default:
886 return -EINVAL; /* should not happen */
887 }
888
889 if (!hdr)
890 return 0;
891
892 len = min_t(unsigned int, len, ipv6_optlen(hdr));
893 if (copy_to_user(optval, hdr, len))
894 return -EFAULT;
895 return len;
896 }
897
898 static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
899 char __user *optval, int __user *optlen)
900 {
901 struct ipv6_pinfo *np = inet6_sk(sk);
902 int len;
903 int val;
904
905 if (ip6_mroute_opt(optname))
906 return ip6_mroute_getsockopt(sk, optname, optval, optlen);
907
908 if (get_user(len, optlen))
909 return -EFAULT;
910 switch (optname) {
911 case IPV6_ADDRFORM:
912 if (sk->sk_protocol != IPPROTO_UDP &&
913 sk->sk_protocol != IPPROTO_UDPLITE &&
914 sk->sk_protocol != IPPROTO_TCP)
915 return -ENOPROTOOPT;
916 if (sk->sk_state != TCP_ESTABLISHED)
917 return -ENOTCONN;
918 val = sk->sk_family;
919 break;
920 case MCAST_MSFILTER:
921 {
922 struct group_filter gsf;
923 int err;
924
925 if (len < GROUP_FILTER_SIZE(0))
926 return -EINVAL;
927 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
928 return -EFAULT;
929 if (gsf.gf_group.ss_family != AF_INET6)
930 return -EADDRNOTAVAIL;
931 lock_sock(sk);
932 err = ip6_mc_msfget(sk, &gsf,
933 (struct group_filter __user *)optval, optlen);
934 release_sock(sk);
935 return err;
936 }
937
938 case IPV6_2292PKTOPTIONS:
939 {
940 struct msghdr msg;
941 struct sk_buff *skb;
942
943 if (sk->sk_type != SOCK_STREAM)
944 return -ENOPROTOOPT;
945
946 msg.msg_control = optval;
947 msg.msg_controllen = len;
948 msg.msg_flags = 0;
949
950 lock_sock(sk);
951 skb = np->pktoptions;
952 if (skb)
953 atomic_inc(&skb->users);
954 release_sock(sk);
955
956 if (skb) {
957 int err = datagram_recv_ctl(sk, &msg, skb);
958 kfree_skb(skb);
959 if (err)
960 return err;
961 } else {
962 if (np->rxopt.bits.rxinfo) {
963 struct in6_pktinfo src_info;
964 src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif :
965 np->sticky_pktinfo.ipi6_ifindex;
966 np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) :
967 ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr));
968 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
969 }
970 if (np->rxopt.bits.rxhlim) {
971 int hlim = np->mcast_hops;
972 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
973 }
974 if (np->rxopt.bits.rxoinfo) {
975 struct in6_pktinfo src_info;
976 src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif :
977 np->sticky_pktinfo.ipi6_ifindex;
978 np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) :
979 ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr));
980 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
981 }
982 if (np->rxopt.bits.rxohlim) {
983 int hlim = np->mcast_hops;
984 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
985 }
986 }
987 len -= msg.msg_controllen;
988 return put_user(len, optlen);
989 }
990 case IPV6_MTU:
991 {
992 struct dst_entry *dst;
993
994 val = 0;
995 rcu_read_lock();
996 dst = __sk_dst_get(sk);
997 if (dst)
998 val = dst_mtu(dst);
999 rcu_read_unlock();
1000 if (!val)
1001 return -ENOTCONN;
1002 break;
1003 }
1004
1005 case IPV6_V6ONLY:
1006 val = np->ipv6only;
1007 break;
1008
1009 case IPV6_RECVPKTINFO:
1010 val = np->rxopt.bits.rxinfo;
1011 break;
1012
1013 case IPV6_2292PKTINFO:
1014 val = np->rxopt.bits.rxoinfo;
1015 break;
1016
1017 case IPV6_RECVHOPLIMIT:
1018 val = np->rxopt.bits.rxhlim;
1019 break;
1020
1021 case IPV6_2292HOPLIMIT:
1022 val = np->rxopt.bits.rxohlim;
1023 break;
1024
1025 case IPV6_RECVRTHDR:
1026 val = np->rxopt.bits.srcrt;
1027 break;
1028
1029 case IPV6_2292RTHDR:
1030 val = np->rxopt.bits.osrcrt;
1031 break;
1032
1033 case IPV6_HOPOPTS:
1034 case IPV6_RTHDRDSTOPTS:
1035 case IPV6_RTHDR:
1036 case IPV6_DSTOPTS:
1037 {
1038
1039 lock_sock(sk);
1040 len = ipv6_getsockopt_sticky(sk, np->opt,
1041 optname, optval, len);
1042 release_sock(sk);
1043 /* check if ipv6_getsockopt_sticky() returns err code */
1044 if (len < 0)
1045 return len;
1046 return put_user(len, optlen);
1047 }
1048
1049 case IPV6_RECVHOPOPTS:
1050 val = np->rxopt.bits.hopopts;
1051 break;
1052
1053 case IPV6_2292HOPOPTS:
1054 val = np->rxopt.bits.ohopopts;
1055 break;
1056
1057 case IPV6_RECVDSTOPTS:
1058 val = np->rxopt.bits.dstopts;
1059 break;
1060
1061 case IPV6_2292DSTOPTS:
1062 val = np->rxopt.bits.odstopts;
1063 break;
1064
1065 case IPV6_TCLASS:
1066 val = np->tclass;
1067 break;
1068
1069 case IPV6_RECVTCLASS:
1070 val = np->rxopt.bits.rxtclass;
1071 break;
1072
1073 case IPV6_FLOWINFO:
1074 val = np->rxopt.bits.rxflow;
1075 break;
1076
1077 case IPV6_RECVPATHMTU:
1078 val = np->rxopt.bits.rxpmtu;
1079 break;
1080
1081 case IPV6_PATHMTU:
1082 {
1083 struct dst_entry *dst;
1084 struct ip6_mtuinfo mtuinfo;
1085
1086 if (len < sizeof(mtuinfo))
1087 return -EINVAL;
1088
1089 len = sizeof(mtuinfo);
1090 memset(&mtuinfo, 0, sizeof(mtuinfo));
1091
1092 rcu_read_lock();
1093 dst = __sk_dst_get(sk);
1094 if (dst)
1095 mtuinfo.ip6m_mtu = dst_mtu(dst);
1096 rcu_read_unlock();
1097 if (!mtuinfo.ip6m_mtu)
1098 return -ENOTCONN;
1099
1100 if (put_user(len, optlen))
1101 return -EFAULT;
1102 if (copy_to_user(optval, &mtuinfo, len))
1103 return -EFAULT;
1104
1105 return 0;
1106 break;
1107 }
1108
1109 case IPV6_UNICAST_HOPS:
1110 case IPV6_MULTICAST_HOPS:
1111 {
1112 struct dst_entry *dst;
1113
1114 if (optname == IPV6_UNICAST_HOPS)
1115 val = np->hop_limit;
1116 else
1117 val = np->mcast_hops;
1118
1119 if (val < 0) {
1120 rcu_read_lock();
1121 dst = __sk_dst_get(sk);
1122 if (dst)
1123 val = ip6_dst_hoplimit(dst);
1124 rcu_read_unlock();
1125 }
1126
1127 if (val < 0)
1128 val = sock_net(sk)->ipv6.devconf_all->hop_limit;
1129 break;
1130 }
1131
1132 case IPV6_MULTICAST_LOOP:
1133 val = np->mc_loop;
1134 break;
1135
1136 case IPV6_MULTICAST_IF:
1137 val = np->mcast_oif;
1138 break;
1139
1140 case IPV6_MTU_DISCOVER:
1141 val = np->pmtudisc;
1142 break;
1143
1144 case IPV6_RECVERR:
1145 val = np->recverr;
1146 break;
1147
1148 case IPV6_FLOWINFO_SEND:
1149 val = np->sndflow;
1150 break;
1151
1152 case IPV6_ADDR_PREFERENCES:
1153 val = 0;
1154
1155 if (np->srcprefs & IPV6_PREFER_SRC_TMP)
1156 val |= IPV6_PREFER_SRC_TMP;
1157 else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC)
1158 val |= IPV6_PREFER_SRC_PUBLIC;
1159 else {
1160 /* XXX: should we return system default? */
1161 val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT;
1162 }
1163
1164 if (np->srcprefs & IPV6_PREFER_SRC_COA)
1165 val |= IPV6_PREFER_SRC_COA;
1166 else
1167 val |= IPV6_PREFER_SRC_HOME;
1168 break;
1169
1170 case IPV6_MINHOPCOUNT:
1171 val = np->min_hopcount;
1172 break;
1173
1174 case IPV6_DONTFRAG:
1175 val = np->dontfrag;
1176 break;
1177
1178 default:
1179 return -ENOPROTOOPT;
1180 }
1181 len = min_t(unsigned int, sizeof(int), len);
1182 if(put_user(len, optlen))
1183 return -EFAULT;
1184 if(copy_to_user(optval,&val,len))
1185 return -EFAULT;
1186 return 0;
1187 }
1188
1189 int ipv6_getsockopt(struct sock *sk, int level, int optname,
1190 char __user *optval, int __user *optlen)
1191 {
1192 int err;
1193
1194 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
1195 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1196
1197 if(level != SOL_IPV6)
1198 return -ENOPROTOOPT;
1199
1200 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1201 #ifdef CONFIG_NETFILTER
1202 /* we need to exclude all possible ENOPROTOOPTs except default case */
1203 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
1204 int len;
1205
1206 if (get_user(len, optlen))
1207 return -EFAULT;
1208
1209 lock_sock(sk);
1210 err = nf_getsockopt(sk, PF_INET6, optname, optval,
1211 &len);
1212 release_sock(sk);
1213 if (err >= 0)
1214 err = put_user(len, optlen);
1215 }
1216 #endif
1217 return err;
1218 }
1219
1220 EXPORT_SYMBOL(ipv6_getsockopt);
1221
1222 #ifdef CONFIG_COMPAT
1223 int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
1224 char __user *optval, int __user *optlen)
1225 {
1226 int err;
1227
1228 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
1229 if (udp_prot.compat_getsockopt != NULL)
1230 return udp_prot.compat_getsockopt(sk, level, optname,
1231 optval, optlen);
1232 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1233 }
1234
1235 if (level != SOL_IPV6)
1236 return -ENOPROTOOPT;
1237
1238 if (optname == MCAST_MSFILTER)
1239 return compat_mc_getsockopt(sk, level, optname, optval, optlen,
1240 ipv6_getsockopt);
1241
1242 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1243 #ifdef CONFIG_NETFILTER
1244 /* we need to exclude all possible ENOPROTOOPTs except default case */
1245 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
1246 int len;
1247
1248 if (get_user(len, optlen))
1249 return -EFAULT;
1250
1251 lock_sock(sk);
1252 err = compat_nf_getsockopt(sk, PF_INET6,
1253 optname, optval, &len);
1254 release_sock(sk);
1255 if (err >= 0)
1256 err = put_user(len, optlen);
1257 }
1258 #endif
1259 return err;
1260 }
1261
1262 EXPORT_SYMBOL(compat_ipv6_getsockopt);
1263 #endif
1264
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree