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v2.6.22.24-op1
[linux-2.6.22.y-op.git] / net / ipv6 / ipv6_sockglue.c
blobf329029cfbe6345f9873f46d68b3833b660dbbb1
1 /*
2 * IPv6 BSD socket options interface
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <roque@di.fc.ul.pt>
7 *
8 * Based on linux/net/ipv4/ip_sockglue.c
9 *
10 * $Id: ipv6_sockglue.c,v 1.41 2002/02/01 22:01:04 davem Exp $
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
16 *
17 * FIXME: Make the setsockopt code POSIX compliant: That is
18 *
19 * o Return -EINVAL for setsockopt of short lengths
20 * o Truncate getsockopt returns
21 * o Return an optlen of the truncated length if need be
22 *
23 * Changes:
24 * David L Stevens <dlstevens@us.ibm.com>:
25 * - added multicast source filtering API for MLDv2
26 */
27
28 #include <linux/module.h>
29 #include <linux/capability.h>
30 #include <linux/errno.h>
31 #include <linux/types.h>
32 #include <linux/socket.h>
33 #include <linux/sockios.h>
34 #include <linux/net.h>
35 #include <linux/in6.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
56 #include <asm/uaccess.h>
57
58 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly;
59
60 static struct inet6_protocol *ipv6_gso_pull_exthdrs(struct sk_buff *skb,
61 int proto)
62 {
63 struct inet6_protocol *ops = NULL;
64
65 for (;;) {
66 struct ipv6_opt_hdr *opth;
67 int len;
68
69 if (proto != NEXTHDR_HOP) {
70 ops = rcu_dereference(inet6_protos[proto]);
71
72 if (unlikely(!ops))
73 break;
74
75 if (!(ops->flags & INET6_PROTO_GSO_EXTHDR))
76 break;
77 }
78
79 if (unlikely(!pskb_may_pull(skb, 8)))
80 break;
81
82 opth = (void *)skb->data;
83 len = opth->hdrlen * 8 + 8;
84
85 if (unlikely(!pskb_may_pull(skb, len)))
86 break;
87
88 proto = opth->nexthdr;
89 __skb_pull(skb, len);
90 }
91
92 return ops;
93 }
94
95 static int ipv6_gso_send_check(struct sk_buff *skb)
96 {
97 struct ipv6hdr *ipv6h;
98 struct inet6_protocol *ops;
99 int err = -EINVAL;
100
101 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
102 goto out;
103
104 ipv6h = ipv6_hdr(skb);
105 __skb_pull(skb, sizeof(*ipv6h));
106 err = -EPROTONOSUPPORT;
107
108 rcu_read_lock();
109 ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
110 if (likely(ops && ops->gso_send_check)) {
111 skb_reset_transport_header(skb);
112 err = ops->gso_send_check(skb);
113 }
114 rcu_read_unlock();
115
116 out:
117 return err;
118 }
119
120 static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features)
121 {
122 struct sk_buff *segs = ERR_PTR(-EINVAL);
123 struct ipv6hdr *ipv6h;
124 struct inet6_protocol *ops;
125
126 if (!(features & NETIF_F_HW_CSUM))
127 features &= ~NETIF_F_SG;
128
129 if (unlikely(skb_shinfo(skb)->gso_type &
130 ~(SKB_GSO_UDP |
131 SKB_GSO_DODGY |
132 SKB_GSO_TCP_ECN |
133 SKB_GSO_TCPV6 |
134 0)))
135 goto out;
136
137 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
138 goto out;
139
140 ipv6h = ipv6_hdr(skb);
141 __skb_pull(skb, sizeof(*ipv6h));
142 segs = ERR_PTR(-EPROTONOSUPPORT);
143
144 rcu_read_lock();
145 ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
146 if (likely(ops && ops->gso_segment)) {
147 skb_reset_transport_header(skb);
148 segs = ops->gso_segment(skb, features);
149 }
150 rcu_read_unlock();
151
152 if (unlikely(IS_ERR(segs)))
153 goto out;
154
155 for (skb = segs; skb; skb = skb->next) {
156 ipv6h = ipv6_hdr(skb);
157 ipv6h->payload_len = htons(skb->len - skb->mac_len -
158 sizeof(*ipv6h));
159 }
160
161 out:
162 return segs;
163 }
164
165 static struct packet_type ipv6_packet_type = {
166 .type = __constant_htons(ETH_P_IPV6),
167 .func = ipv6_rcv,
168 .gso_send_check = ipv6_gso_send_check,
169 .gso_segment = ipv6_gso_segment,
170 };
171
172 struct ip6_ra_chain *ip6_ra_chain;
173 DEFINE_RWLOCK(ip6_ra_lock);
174
175 int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *))
176 {
177 struct ip6_ra_chain *ra, *new_ra, **rap;
178
179 /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
180 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW)
181 return -EINVAL;
182
183 new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
184
185 write_lock_bh(&ip6_ra_lock);
186 for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
187 if (ra->sk == sk) {
188 if (sel>=0) {
189 write_unlock_bh(&ip6_ra_lock);
190 kfree(new_ra);
191 return -EADDRINUSE;
192 }
193
194 *rap = ra->next;
195 write_unlock_bh(&ip6_ra_lock);
196
197 if (ra->destructor)
198 ra->destructor(sk);
199 sock_put(sk);
200 kfree(ra);
201 return 0;
202 }
203 }
204 if (new_ra == NULL) {
205 write_unlock_bh(&ip6_ra_lock);
206 return -ENOBUFS;
207 }
208 new_ra->sk = sk;
209 new_ra->sel = sel;
210 new_ra->destructor = destructor;
211 new_ra->next = ra;
212 *rap = new_ra;
213 sock_hold(sk);
214 write_unlock_bh(&ip6_ra_lock);
215 return 0;
216 }
217
218 static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
219 char __user *optval, int optlen)
220 {
221 struct ipv6_pinfo *np = inet6_sk(sk);
222 int val, valbool;
223 int retv = -ENOPROTOOPT;
224
225 if (optval == NULL)
226 val=0;
227 else if (get_user(val, (int __user *) optval))
228 return -EFAULT;
229
230 valbool = (val!=0);
231
232 lock_sock(sk);
233
234 switch (optname) {
235
236 case IPV6_ADDRFORM:
237 if (val == PF_INET) {
238 struct ipv6_txoptions *opt;
239 struct sk_buff *pktopt;
240
241 if (sk->sk_protocol != IPPROTO_UDP &&
242 sk->sk_protocol != IPPROTO_UDPLITE &&
243 sk->sk_protocol != IPPROTO_TCP)
244 break;
245
246 if (sk->sk_state != TCP_ESTABLISHED) {
247 retv = -ENOTCONN;
248 break;
249 }
250
251 if (ipv6_only_sock(sk) ||
252 !(ipv6_addr_type(&np->daddr) & IPV6_ADDR_MAPPED)) {
253 retv = -EADDRNOTAVAIL;
254 break;
255 }
256
257 fl6_free_socklist(sk);
258 ipv6_sock_mc_close(sk);
259
260 /*
261 * Sock is moving from IPv6 to IPv4 (sk_prot), so
262 * remove it from the refcnt debug socks count in the
263 * original family...
264 */
265 sk_refcnt_debug_dec(sk);
266
267 if (sk->sk_protocol == IPPROTO_TCP) {
268 struct inet_connection_sock *icsk = inet_csk(sk);
269
270 local_bh_disable();
271 sock_prot_dec_use(sk->sk_prot);
272 sock_prot_inc_use(&tcp_prot);
273 local_bh_enable();
274 sk->sk_prot = &tcp_prot;
275 icsk->icsk_af_ops = &ipv4_specific;
276 sk->sk_socket->ops = &inet_stream_ops;
277 sk->sk_family = PF_INET;
278 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
279 } else {
280 struct proto *prot = &udp_prot;
281
282 if (sk->sk_protocol == IPPROTO_UDPLITE)
283 prot = &udplite_prot;
284 local_bh_disable();
285 sock_prot_dec_use(sk->sk_prot);
286 sock_prot_inc_use(prot);
287 local_bh_enable();
288 sk->sk_prot = prot;
289 sk->sk_socket->ops = &inet_dgram_ops;
290 sk->sk_family = PF_INET;
291 }
292 opt = xchg(&np->opt, NULL);
293 if (opt)
294 sock_kfree_s(sk, opt, opt->tot_len);
295 pktopt = xchg(&np->pktoptions, NULL);
296 if (pktopt)
297 kfree_skb(pktopt);
298
299 sk->sk_destruct = inet_sock_destruct;
300 /*
301 * ... and add it to the refcnt debug socks count
302 * in the new family. -acme
303 */
304 sk_refcnt_debug_inc(sk);
305 module_put(THIS_MODULE);
306 retv = 0;
307 break;
308 }
309 goto e_inval;
310
311 case IPV6_V6ONLY:
312 if (inet_sk(sk)->num)
313 goto e_inval;
314 np->ipv6only = valbool;
315 retv = 0;
316 break;
317
318 case IPV6_RECVPKTINFO:
319 np->rxopt.bits.rxinfo = valbool;
320 retv = 0;
321 break;
322
323 case IPV6_2292PKTINFO:
324 np->rxopt.bits.rxoinfo = valbool;
325 retv = 0;
326 break;
327
328 case IPV6_RECVHOPLIMIT:
329 np->rxopt.bits.rxhlim = valbool;
330 retv = 0;
331 break;
332
333 case IPV6_2292HOPLIMIT:
334 np->rxopt.bits.rxohlim = valbool;
335 retv = 0;
336 break;
337
338 case IPV6_RECVRTHDR:
339 if (val < 0 || val > 2)
340 goto e_inval;
341 np->rxopt.bits.srcrt = val;
342 retv = 0;
343 break;
344
345 case IPV6_2292RTHDR:
346 if (val < 0 || val > 2)
347 goto e_inval;
348 np->rxopt.bits.osrcrt = val;
349 retv = 0;
350 break;
351
352 case IPV6_RECVHOPOPTS:
353 np->rxopt.bits.hopopts = valbool;
354 retv = 0;
355 break;
356
357 case IPV6_2292HOPOPTS:
358 np->rxopt.bits.ohopopts = valbool;
359 retv = 0;
360 break;
361
362 case IPV6_RECVDSTOPTS:
363 np->rxopt.bits.dstopts = valbool;
364 retv = 0;
365 break;
366
367 case IPV6_2292DSTOPTS:
368 np->rxopt.bits.odstopts = valbool;
369 retv = 0;
370 break;
371
372 case IPV6_TCLASS:
373 if (val < -1 || val > 0xff)
374 goto e_inval;
375 np->tclass = val;
376 retv = 0;
377 break;
378
379 case IPV6_RECVTCLASS:
380 np->rxopt.bits.rxtclass = valbool;
381 retv = 0;
382 break;
383
384 case IPV6_FLOWINFO:
385 np->rxopt.bits.rxflow = valbool;
386 retv = 0;
387 break;
388
389 case IPV6_HOPOPTS:
390 case IPV6_RTHDRDSTOPTS:
391 case IPV6_RTHDR:
392 case IPV6_DSTOPTS:
393 {
394 struct ipv6_txoptions *opt;
395 if (optlen == 0)
396 optval = NULL;
397
398 /* hop-by-hop / destination options are privileged option */
399 retv = -EPERM;
400 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
401 break;
402
403 retv = -EINVAL;
404 if (optlen & 0x7 || optlen > 8 * 255)
405 break;
406
407 opt = ipv6_renew_options(sk, np->opt, optname,
408 (struct ipv6_opt_hdr __user *)optval,
409 optlen);
410 if (IS_ERR(opt)) {
411 retv = PTR_ERR(opt);
412 break;
413 }
414
415 /* routing header option needs extra check */
416 if (optname == IPV6_RTHDR && opt && opt->srcrt) {
417 struct ipv6_rt_hdr *rthdr = opt->srcrt;
418 switch (rthdr->type) {
419 case IPV6_SRCRT_TYPE_0:
420 #ifdef CONFIG_IPV6_MIP6
421 case IPV6_SRCRT_TYPE_2:
422 #endif
423 break;
424 default:
425 goto sticky_done;
426 }
427
428 if ((rthdr->hdrlen & 1) ||
429 (rthdr->hdrlen >> 1) != rthdr->segments_left)
430 goto sticky_done;
431 }
432
433 retv = 0;
434 if (inet_sk(sk)->is_icsk) {
435 if (opt) {
436 struct inet_connection_sock *icsk = inet_csk(sk);
437 if (!((1 << sk->sk_state) &
438 (TCPF_LISTEN | TCPF_CLOSE))
439 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
440 icsk->icsk_ext_hdr_len =
441 opt->opt_flen + opt->opt_nflen;
442 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
443 }
444 }
445 opt = xchg(&np->opt, opt);
446 sk_dst_reset(sk);
447 } else {
448 write_lock(&sk->sk_dst_lock);
449 opt = xchg(&np->opt, opt);
450 write_unlock(&sk->sk_dst_lock);
451 sk_dst_reset(sk);
452 }
453 sticky_done:
454 if (opt)
455 sock_kfree_s(sk, opt, opt->tot_len);
456 break;
457 }
458
459 case IPV6_2292PKTOPTIONS:
460 {
461 struct ipv6_txoptions *opt = NULL;
462 struct msghdr msg;
463 struct flowi fl;
464 int junk;
465
466 fl.fl6_flowlabel = 0;
467 fl.oif = sk->sk_bound_dev_if;
468
469 if (optlen == 0)
470 goto update;
471
472 /* 1K is probably excessive
473 * 1K is surely not enough, 2K per standard header is 16K.
474 */
475 retv = -EINVAL;
476 if (optlen > 64*1024)
477 break;
478
479 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
480 retv = -ENOBUFS;
481 if (opt == NULL)
482 break;
483
484 memset(opt, 0, sizeof(*opt));
485 opt->tot_len = sizeof(*opt) + optlen;
486 retv = -EFAULT;
487 if (copy_from_user(opt+1, optval, optlen))
488 goto done;
489
490 msg.msg_controllen = optlen;
491 msg.msg_control = (void*)(opt+1);
492
493 retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk);
494 if (retv)
495 goto done;
496 update:
497 retv = 0;
498 if (inet_sk(sk)->is_icsk) {
499 if (opt) {
500 struct inet_connection_sock *icsk = inet_csk(sk);
501 if (!((1 << sk->sk_state) &
502 (TCPF_LISTEN | TCPF_CLOSE))
503 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
504 icsk->icsk_ext_hdr_len =
505 opt->opt_flen + opt->opt_nflen;
506 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
507 }
508 }
509 opt = xchg(&np->opt, opt);
510 sk_dst_reset(sk);
511 } else {
512 write_lock(&sk->sk_dst_lock);
513 opt = xchg(&np->opt, opt);
514 write_unlock(&sk->sk_dst_lock);
515 sk_dst_reset(sk);
516 }
517
518 done:
519 if (opt)
520 sock_kfree_s(sk, opt, opt->tot_len);
521 break;
522 }
523 case IPV6_UNICAST_HOPS:
524 if (val > 255 || val < -1)
525 goto e_inval;
526 np->hop_limit = val;
527 retv = 0;
528 break;
529
530 case IPV6_MULTICAST_HOPS:
531 if (sk->sk_type == SOCK_STREAM)
532 goto e_inval;
533 if (val > 255 || val < -1)
534 goto e_inval;
535 np->mcast_hops = val;
536 retv = 0;
537 break;
538
539 case IPV6_MULTICAST_LOOP:
540 np->mc_loop = valbool;
541 retv = 0;
542 break;
543
544 case IPV6_MULTICAST_IF:
545 if (sk->sk_type == SOCK_STREAM)
546 goto e_inval;
547 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
548 goto e_inval;
549
550 if (__dev_get_by_index(val) == NULL) {
551 retv = -ENODEV;
552 break;
553 }
554 np->mcast_oif = val;
555 retv = 0;
556 break;
557 case IPV6_ADD_MEMBERSHIP:
558 case IPV6_DROP_MEMBERSHIP:
559 {
560 struct ipv6_mreq mreq;
561
562 retv = -EFAULT;
563 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
564 break;
565
566 if (optname == IPV6_ADD_MEMBERSHIP)
567 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
568 else
569 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
570 break;
571 }
572 case IPV6_JOIN_ANYCAST:
573 case IPV6_LEAVE_ANYCAST:
574 {
575 struct ipv6_mreq mreq;
576
577 if (optlen != sizeof(struct ipv6_mreq))
578 goto e_inval;
579
580 retv = -EFAULT;
581 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
582 break;
583
584 if (optname == IPV6_JOIN_ANYCAST)
585 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
586 else
587 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
588 break;
589 }
590 case MCAST_JOIN_GROUP:
591 case MCAST_LEAVE_GROUP:
592 {
593 struct group_req greq;
594 struct sockaddr_in6 *psin6;
595
596 retv = -EFAULT;
597 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
598 break;
599 if (greq.gr_group.ss_family != AF_INET6) {
600 retv = -EADDRNOTAVAIL;
601 break;
602 }
603 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
604 if (optname == MCAST_JOIN_GROUP)
605 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
606 &psin6->sin6_addr);
607 else
608 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
609 &psin6->sin6_addr);
610 break;
611 }
612 case MCAST_JOIN_SOURCE_GROUP:
613 case MCAST_LEAVE_SOURCE_GROUP:
614 case MCAST_BLOCK_SOURCE:
615 case MCAST_UNBLOCK_SOURCE:
616 {
617 struct group_source_req greqs;
618 int omode, add;
619
620 if (optlen != sizeof(struct group_source_req))
621 goto e_inval;
622 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
623 retv = -EFAULT;
624 break;
625 }
626 if (greqs.gsr_group.ss_family != AF_INET6 ||
627 greqs.gsr_source.ss_family != AF_INET6) {
628 retv = -EADDRNOTAVAIL;
629 break;
630 }
631 if (optname == MCAST_BLOCK_SOURCE) {
632 omode = MCAST_EXCLUDE;
633 add = 1;
634 } else if (optname == MCAST_UNBLOCK_SOURCE) {
635 omode = MCAST_EXCLUDE;
636 add = 0;
637 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
638 struct sockaddr_in6 *psin6;
639
640 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
641 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
642 &psin6->sin6_addr);
643 /* prior join w/ different source is ok */
644 if (retv && retv != -EADDRINUSE)
645 break;
646 omode = MCAST_INCLUDE;
647 add = 1;
648 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
649 omode = MCAST_INCLUDE;
650 add = 0;
651 }
652 retv = ip6_mc_source(add, omode, sk, &greqs);
653 break;
654 }
655 case MCAST_MSFILTER:
656 {
657 extern int sysctl_mld_max_msf;
658 struct group_filter *gsf;
659
660 if (optlen < GROUP_FILTER_SIZE(0))
661 goto e_inval;
662 if (optlen > sysctl_optmem_max) {
663 retv = -ENOBUFS;
664 break;
665 }
666 gsf = kmalloc(optlen,GFP_KERNEL);
667 if (gsf == 0) {
668 retv = -ENOBUFS;
669 break;
670 }
671 retv = -EFAULT;
672 if (copy_from_user(gsf, optval, optlen)) {
673 kfree(gsf);
674 break;
675 }
676 /* numsrc >= (4G-140)/128 overflow in 32 bits */
677 if (gsf->gf_numsrc >= 0x1ffffffU ||
678 gsf->gf_numsrc > sysctl_mld_max_msf) {
679 kfree(gsf);
680 retv = -ENOBUFS;
681 break;
682 }
683 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
684 kfree(gsf);
685 retv = -EINVAL;
686 break;
687 }
688 retv = ip6_mc_msfilter(sk, gsf);
689 kfree(gsf);
690
691 break;
692 }
693 case IPV6_ROUTER_ALERT:
694 retv = ip6_ra_control(sk, val, NULL);
695 break;
696 case IPV6_MTU_DISCOVER:
697 if (val<0 || val>3)
698 goto e_inval;
699 np->pmtudisc = val;
700 retv = 0;
701 break;
702 case IPV6_MTU:
703 if (val && val < IPV6_MIN_MTU)
704 goto e_inval;
705 np->frag_size = val;
706 retv = 0;
707 break;
708 case IPV6_RECVERR:
709 np->recverr = valbool;
710 if (!val)
711 skb_queue_purge(&sk->sk_error_queue);
712 retv = 0;
713 break;
714 case IPV6_FLOWINFO_SEND:
715 np->sndflow = valbool;
716 retv = 0;
717 break;
718 case IPV6_FLOWLABEL_MGR:
719 retv = ipv6_flowlabel_opt(sk, optval, optlen);
720 break;
721 case IPV6_IPSEC_POLICY:
722 case IPV6_XFRM_POLICY:
723 retv = -EPERM;
724 if (!capable(CAP_NET_ADMIN))
725 break;
726 retv = xfrm_user_policy(sk, optname, optval, optlen);
727 break;
728
729 }
730 release_sock(sk);
731
732 return retv;
733
734 e_inval:
735 release_sock(sk);
736 return -EINVAL;
737 }
738
739 int ipv6_setsockopt(struct sock *sk, int level, int optname,
740 char __user *optval, int optlen)
741 {
742 int err;
743
744 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
745 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
746
747 if (level != SOL_IPV6)
748 return -ENOPROTOOPT;
749
750 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
751 #ifdef CONFIG_NETFILTER
752 /* we need to exclude all possible ENOPROTOOPTs except default case */
753 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
754 optname != IPV6_XFRM_POLICY) {
755 lock_sock(sk);
756 err = nf_setsockopt(sk, PF_INET6, optname, optval,
757 optlen);
758 release_sock(sk);
759 }
760 #endif
761 return err;
762 }
763
764 EXPORT_SYMBOL(ipv6_setsockopt);
765
766 #ifdef CONFIG_COMPAT
767 int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
768 char __user *optval, int optlen)
769 {
770 int err;
771
772 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
773 if (udp_prot.compat_setsockopt != NULL)
774 return udp_prot.compat_setsockopt(sk, level, optname,
775 optval, optlen);
776 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
777 }
778
779 if (level != SOL_IPV6)
780 return -ENOPROTOOPT;
781
782 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
783 #ifdef CONFIG_NETFILTER
784 /* we need to exclude all possible ENOPROTOOPTs except default case */
785 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
786 optname != IPV6_XFRM_POLICY) {
787 lock_sock(sk);
788 err = compat_nf_setsockopt(sk, PF_INET6, optname,
789 optval, optlen);
790 release_sock(sk);
791 }
792 #endif
793 return err;
794 }
795
796 EXPORT_SYMBOL(compat_ipv6_setsockopt);
797 #endif
798
799 static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
800 int optname, char __user *optval, int len)
801 {
802 struct ipv6_opt_hdr *hdr;
803
804 if (!opt)
805 return 0;
806
807 switch(optname) {
808 case IPV6_HOPOPTS:
809 hdr = opt->hopopt;
810 break;
811 case IPV6_RTHDRDSTOPTS:
812 hdr = opt->dst0opt;
813 break;
814 case IPV6_RTHDR:
815 hdr = (struct ipv6_opt_hdr *)opt->srcrt;
816 break;
817 case IPV6_DSTOPTS:
818 hdr = opt->dst1opt;
819 break;
820 default:
821 return -EINVAL; /* should not happen */
822 }
823
824 if (!hdr)
825 return 0;
826
827 len = min_t(unsigned int, len, ipv6_optlen(hdr));
828 if (copy_to_user(optval, hdr, len))
829 return -EFAULT;
830 return ipv6_optlen(hdr);
831 }
832
833 static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
834 char __user *optval, int __user *optlen)
835 {
836 struct ipv6_pinfo *np = inet6_sk(sk);
837 int len;
838 int val;
839
840 if (get_user(len, optlen))
841 return -EFAULT;
842 switch (optname) {
843 case IPV6_ADDRFORM:
844 if (sk->sk_protocol != IPPROTO_UDP &&
845 sk->sk_protocol != IPPROTO_UDPLITE &&
846 sk->sk_protocol != IPPROTO_TCP)
847 return -EINVAL;
848 if (sk->sk_state != TCP_ESTABLISHED)
849 return -ENOTCONN;
850 val = sk->sk_family;
851 break;
852 case MCAST_MSFILTER:
853 {
854 struct group_filter gsf;
855 int err;
856
857 if (len < GROUP_FILTER_SIZE(0))
858 return -EINVAL;
859 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
860 return -EFAULT;
861 lock_sock(sk);
862 err = ip6_mc_msfget(sk, &gsf,
863 (struct group_filter __user *)optval, optlen);
864 release_sock(sk);
865 return err;
866 }
867
868 case IPV6_2292PKTOPTIONS:
869 {
870 struct msghdr msg;
871 struct sk_buff *skb;
872
873 if (sk->sk_type != SOCK_STREAM)
874 return -ENOPROTOOPT;
875
876 msg.msg_control = optval;
877 msg.msg_controllen = len;
878 msg.msg_flags = 0;
879
880 lock_sock(sk);
881 skb = np->pktoptions;
882 if (skb)
883 atomic_inc(&skb->users);
884 release_sock(sk);
885
886 if (skb) {
887 int err = datagram_recv_ctl(sk, &msg, skb);
888 kfree_skb(skb);
889 if (err)
890 return err;
891 } else {
892 if (np->rxopt.bits.rxinfo) {
893 struct in6_pktinfo src_info;
894 src_info.ipi6_ifindex = np->mcast_oif;
895 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
896 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
897 }
898 if (np->rxopt.bits.rxhlim) {
899 int hlim = np->mcast_hops;
900 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
901 }
902 if (np->rxopt.bits.rxoinfo) {
903 struct in6_pktinfo src_info;
904 src_info.ipi6_ifindex = np->mcast_oif;
905 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
906 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
907 }
908 if (np->rxopt.bits.rxohlim) {
909 int hlim = np->mcast_hops;
910 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
911 }
912 }
913 len -= msg.msg_controllen;
914 return put_user(len, optlen);
915 }
916 case IPV6_MTU:
917 {
918 struct dst_entry *dst;
919 val = 0;
920 lock_sock(sk);
921 dst = sk_dst_get(sk);
922 if (dst) {
923 val = dst_mtu(dst);
924 dst_release(dst);
925 }
926 release_sock(sk);
927 if (!val)
928 return -ENOTCONN;
929 break;
930 }
931
932 case IPV6_V6ONLY:
933 val = np->ipv6only;
934 break;
935
936 case IPV6_RECVPKTINFO:
937 val = np->rxopt.bits.rxinfo;
938 break;
939
940 case IPV6_2292PKTINFO:
941 val = np->rxopt.bits.rxoinfo;
942 break;
943
944 case IPV6_RECVHOPLIMIT:
945 val = np->rxopt.bits.rxhlim;
946 break;
947
948 case IPV6_2292HOPLIMIT:
949 val = np->rxopt.bits.rxohlim;
950 break;
951
952 case IPV6_RECVRTHDR:
953 val = np->rxopt.bits.srcrt;
954 break;
955
956 case IPV6_2292RTHDR:
957 val = np->rxopt.bits.osrcrt;
958 break;
959
960 case IPV6_HOPOPTS:
961 case IPV6_RTHDRDSTOPTS:
962 case IPV6_RTHDR:
963 case IPV6_DSTOPTS:
964 {
965
966 lock_sock(sk);
967 len = ipv6_getsockopt_sticky(sk, np->opt,
968 optname, optval, len);
969 release_sock(sk);
970 return put_user(len, optlen);
971 }
972
973 case IPV6_RECVHOPOPTS:
974 val = np->rxopt.bits.hopopts;
975 break;
976
977 case IPV6_2292HOPOPTS:
978 val = np->rxopt.bits.ohopopts;
979 break;
980
981 case IPV6_RECVDSTOPTS:
982 val = np->rxopt.bits.dstopts;
983 break;
984
985 case IPV6_2292DSTOPTS:
986 val = np->rxopt.bits.odstopts;
987 break;
988
989 case IPV6_TCLASS:
990 val = np->tclass;
991 if (val < 0)
992 val = 0;
993 break;
994
995 case IPV6_RECVTCLASS:
996 val = np->rxopt.bits.rxtclass;
997 break;
998
999 case IPV6_FLOWINFO:
1000 val = np->rxopt.bits.rxflow;
1001 break;
1002
1003 case IPV6_UNICAST_HOPS:
1004 case IPV6_MULTICAST_HOPS:
1005 {
1006 struct dst_entry *dst;
1007
1008 if (optname == IPV6_UNICAST_HOPS)
1009 val = np->hop_limit;
1010 else
1011 val = np->mcast_hops;
1012
1013 dst = sk_dst_get(sk);
1014 if (dst) {
1015 if (val < 0)
1016 val = dst_metric(dst, RTAX_HOPLIMIT);
1017 if (val < 0)
1018 val = ipv6_get_hoplimit(dst->dev);
1019 dst_release(dst);
1020 }
1021 if (val < 0)
1022 val = ipv6_devconf.hop_limit;
1023 break;
1024 }
1025
1026 case IPV6_MULTICAST_LOOP:
1027 val = np->mc_loop;
1028 break;
1029
1030 case IPV6_MULTICAST_IF:
1031 val = np->mcast_oif;
1032 break;
1033
1034 case IPV6_MTU_DISCOVER:
1035 val = np->pmtudisc;
1036 break;
1037
1038 case IPV6_RECVERR:
1039 val = np->recverr;
1040 break;
1041
1042 case IPV6_FLOWINFO_SEND:
1043 val = np->sndflow;
1044 break;
1045
1046 default:
1047 return -EINVAL;
1048 }
1049 len = min_t(unsigned int, sizeof(int), len);
1050 if(put_user(len, optlen))
1051 return -EFAULT;
1052 if(copy_to_user(optval,&val,len))
1053 return -EFAULT;
1054 return 0;
1055 }
1056
1057 int ipv6_getsockopt(struct sock *sk, int level, int optname,
1058 char __user *optval, int __user *optlen)
1059 {
1060 int err;
1061
1062 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
1063 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1064
1065 if(level != SOL_IPV6)
1066 return -ENOPROTOOPT;
1067
1068 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1069 #ifdef CONFIG_NETFILTER
1070 /* we need to exclude all possible EINVALs except default case */
1071 if (err == -EINVAL && optname != IPV6_ADDRFORM &&
1072 optname != MCAST_MSFILTER) {
1073 int len;
1074
1075 if (get_user(len, optlen))
1076 return -EFAULT;
1077
1078 lock_sock(sk);
1079 err = nf_getsockopt(sk, PF_INET6, optname, optval,
1080 &len);
1081 release_sock(sk);
1082 if (err >= 0)
1083 err = put_user(len, optlen);
1084 }
1085 #endif
1086 return err;
1087 }
1088
1089 EXPORT_SYMBOL(ipv6_getsockopt);
1090
1091 #ifdef CONFIG_COMPAT
1092 int compat_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 if (udp_prot.compat_getsockopt != NULL)
1099 return udp_prot.compat_getsockopt(sk, level, optname,
1100 optval, optlen);
1101 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1102 }
1103
1104 if (level != SOL_IPV6)
1105 return -ENOPROTOOPT;
1106
1107 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1108 #ifdef CONFIG_NETFILTER
1109 /* we need to exclude all possible EINVALs except default case */
1110 if (err == -EINVAL && optname != IPV6_ADDRFORM &&
1111 optname != MCAST_MSFILTER) {
1112 int len;
1113
1114 if (get_user(len, optlen))
1115 return -EFAULT;
1116
1117 lock_sock(sk);
1118 err = compat_nf_getsockopt(sk, PF_INET6,
1119 optname, optval, &len);
1120 release_sock(sk);
1121 if (err >= 0)
1122 err = put_user(len, optlen);
1123 }
1124 #endif
1125 return err;
1126 }
1127
1128 EXPORT_SYMBOL(compat_ipv6_getsockopt);
1129 #endif
1130
1131 void __init ipv6_packet_init(void)
1132 {
1133 dev_add_pack(&ipv6_packet_type);
1134 }
1135
1136 void ipv6_packet_cleanup(void)
1137 {
1138 dev_remove_pack(&ipv6_packet_type);
1139 }
linux v2.6.22.y-op