?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
sync hh.org
[hh.org.git] / net / ipv6 / ipv6_sockglue.c
blob1eafcfc95e81d41f5b4459f22a3da50ce8753f8f
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/sched.h>
35 #include <linux/net.h>
36 #include <linux/in6.h>
37 #include <linux/netdevice.h>
38 #include <linux/if_arp.h>
39 #include <linux/init.h>
40 #include <linux/sysctl.h>
41 #include <linux/netfilter.h>
42
43 #include <net/sock.h>
44 #include <net/snmp.h>
45 #include <net/ipv6.h>
46 #include <net/ndisc.h>
47 #include <net/protocol.h>
48 #include <net/transp_v6.h>
49 #include <net/ip6_route.h>
50 #include <net/addrconf.h>
51 #include <net/inet_common.h>
52 #include <net/tcp.h>
53 #include <net/udp.h>
54 #include <net/udplite.h>
55 #include <net/xfrm.h>
56
57 #include <asm/uaccess.h>
58
59 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly;
60
61 static struct inet6_protocol *ipv6_gso_pull_exthdrs(struct sk_buff *skb,
62 int proto)
63 {
64 struct inet6_protocol *ops = NULL;
65
66 for (;;) {
67 struct ipv6_opt_hdr *opth;
68 int len;
69
70 if (proto != NEXTHDR_HOP) {
71 ops = rcu_dereference(inet6_protos[proto]);
72
73 if (unlikely(!ops))
74 break;
75
76 if (!(ops->flags & INET6_PROTO_GSO_EXTHDR))
77 break;
78 }
79
80 if (unlikely(!pskb_may_pull(skb, 8)))
81 break;
82
83 opth = (void *)skb->data;
84 len = opth->hdrlen * 8 + 8;
85
86 if (unlikely(!pskb_may_pull(skb, len)))
87 break;
88
89 proto = opth->nexthdr;
90 __skb_pull(skb, len);
91 }
92
93 return ops;
94 }
95
96 static int ipv6_gso_send_check(struct sk_buff *skb)
97 {
98 struct ipv6hdr *ipv6h;
99 struct inet6_protocol *ops;
100 int err = -EINVAL;
101
102 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
103 goto out;
104
105 ipv6h = skb->nh.ipv6h;
106 __skb_pull(skb, sizeof(*ipv6h));
107 err = -EPROTONOSUPPORT;
108
109 rcu_read_lock();
110 ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
111 if (likely(ops && ops->gso_send_check)) {
112 skb->h.raw = skb->data;
113 err = ops->gso_send_check(skb);
114 }
115 rcu_read_unlock();
116
117 out:
118 return err;
119 }
120
121 static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features)
122 {
123 struct sk_buff *segs = ERR_PTR(-EINVAL);
124 struct ipv6hdr *ipv6h;
125 struct inet6_protocol *ops;
126
127 if (!(features & NETIF_F_HW_CSUM))
128 features &= ~NETIF_F_SG;
129
130 if (unlikely(skb_shinfo(skb)->gso_type &
131 ~(SKB_GSO_UDP |
132 SKB_GSO_DODGY |
133 SKB_GSO_TCP_ECN |
134 SKB_GSO_TCPV6 |
135 0)))
136 goto out;
137
138 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
139 goto out;
140
141 ipv6h = skb->nh.ipv6h;
142 __skb_pull(skb, sizeof(*ipv6h));
143 segs = ERR_PTR(-EPROTONOSUPPORT);
144
145 rcu_read_lock();
146 ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
147 if (likely(ops && ops->gso_segment)) {
148 skb->h.raw = skb->data;
149 segs = ops->gso_segment(skb, features);
150 }
151 rcu_read_unlock();
152
153 if (unlikely(IS_ERR(segs)))
154 goto out;
155
156 for (skb = segs; skb; skb = skb->next) {
157 ipv6h = skb->nh.ipv6h;
158 ipv6h->payload_len = htons(skb->len - skb->mac_len -
159 sizeof(*ipv6h));
160 }
161
162 out:
163 return segs;
164 }
165
166 static struct packet_type ipv6_packet_type = {
167 .type = __constant_htons(ETH_P_IPV6),
168 .func = ipv6_rcv,
169 .gso_send_check = ipv6_gso_send_check,
170 .gso_segment = ipv6_gso_segment,
171 };
172
173 struct ip6_ra_chain *ip6_ra_chain;
174 DEFINE_RWLOCK(ip6_ra_lock);
175
176 int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *))
177 {
178 struct ip6_ra_chain *ra, *new_ra, **rap;
179
180 /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
181 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW)
182 return -EINVAL;
183
184 new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
185
186 write_lock_bh(&ip6_ra_lock);
187 for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
188 if (ra->sk == sk) {
189 if (sel>=0) {
190 write_unlock_bh(&ip6_ra_lock);
191 kfree(new_ra);
192 return -EADDRINUSE;
193 }
194
195 *rap = ra->next;
196 write_unlock_bh(&ip6_ra_lock);
197
198 if (ra->destructor)
199 ra->destructor(sk);
200 sock_put(sk);
201 kfree(ra);
202 return 0;
203 }
204 }
205 if (new_ra == NULL) {
206 write_unlock_bh(&ip6_ra_lock);
207 return -ENOBUFS;
208 }
209 new_ra->sk = sk;
210 new_ra->sel = sel;
211 new_ra->destructor = destructor;
212 new_ra->next = ra;
213 *rap = new_ra;
214 sock_hold(sk);
215 write_unlock_bh(&ip6_ra_lock);
216 return 0;
217 }
218
219 static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
220 char __user *optval, int optlen)
221 {
222 struct ipv6_pinfo *np = inet6_sk(sk);
223 int val, valbool;
224 int retv = -ENOPROTOOPT;
225
226 if (optval == NULL)
227 val=0;
228 else if (get_user(val, (int __user *) optval))
229 return -EFAULT;
230
231 valbool = (val!=0);
232
233 lock_sock(sk);
234
235 switch (optname) {
236
237 case IPV6_ADDRFORM:
238 if (val == PF_INET) {
239 struct ipv6_txoptions *opt;
240 struct sk_buff *pktopt;
241
242 if (sk->sk_protocol != IPPROTO_UDP &&
243 sk->sk_protocol != IPPROTO_UDPLITE &&
244 sk->sk_protocol != IPPROTO_TCP)
245 break;
246
247 if (sk->sk_state != TCP_ESTABLISHED) {
248 retv = -ENOTCONN;
249 break;
250 }
251
252 if (ipv6_only_sock(sk) ||
253 !(ipv6_addr_type(&np->daddr) & IPV6_ADDR_MAPPED)) {
254 retv = -EADDRNOTAVAIL;
255 break;
256 }
257
258 fl6_free_socklist(sk);
259 ipv6_sock_mc_close(sk);
260
261 /*
262 * Sock is moving from IPv6 to IPv4 (sk_prot), so
263 * remove it from the refcnt debug socks count in the
264 * original family...
265 */
266 sk_refcnt_debug_dec(sk);
267
268 if (sk->sk_protocol == IPPROTO_TCP) {
269 struct inet_connection_sock *icsk = inet_csk(sk);
270
271 local_bh_disable();
272 sock_prot_dec_use(sk->sk_prot);
273 sock_prot_inc_use(&tcp_prot);
274 local_bh_enable();
275 sk->sk_prot = &tcp_prot;
276 icsk->icsk_af_ops = &ipv4_specific;
277 sk->sk_socket->ops = &inet_stream_ops;
278 sk->sk_family = PF_INET;
279 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
280 } else {
281 struct proto *prot = &udp_prot;
282
283 if (sk->sk_protocol == IPPROTO_UDPLITE)
284 prot = &udplite_prot;
285 local_bh_disable();
286 sock_prot_dec_use(sk->sk_prot);
287 sock_prot_inc_use(prot);
288 local_bh_enable();
289 sk->sk_prot = prot;
290 sk->sk_socket->ops = &inet_dgram_ops;
291 sk->sk_family = PF_INET;
292 }
293 opt = xchg(&np->opt, NULL);
294 if (opt)
295 sock_kfree_s(sk, opt, opt->tot_len);
296 pktopt = xchg(&np->pktoptions, NULL);
297 if (pktopt)
298 kfree_skb(pktopt);
299
300 sk->sk_destruct = inet_sock_destruct;
301 /*
302 * ... and add it to the refcnt debug socks count
303 * in the new family. -acme
304 */
305 sk_refcnt_debug_inc(sk);
306 module_put(THIS_MODULE);
307 retv = 0;
308 break;
309 }
310 goto e_inval;
311
312 case IPV6_V6ONLY:
313 if (inet_sk(sk)->num)
314 goto e_inval;
315 np->ipv6only = valbool;
316 retv = 0;
317 break;
318
319 case IPV6_RECVPKTINFO:
320 np->rxopt.bits.rxinfo = valbool;
321 retv = 0;
322 break;
323
324 case IPV6_2292PKTINFO:
325 np->rxopt.bits.rxoinfo = valbool;
326 retv = 0;
327 break;
328
329 case IPV6_RECVHOPLIMIT:
330 np->rxopt.bits.rxhlim = valbool;
331 retv = 0;
332 break;
333
334 case IPV6_2292HOPLIMIT:
335 np->rxopt.bits.rxohlim = valbool;
336 retv = 0;
337 break;
338
339 case IPV6_RECVRTHDR:
340 if (val < 0 || val > 2)
341 goto e_inval;
342 np->rxopt.bits.srcrt = val;
343 retv = 0;
344 break;
345
346 case IPV6_2292RTHDR:
347 if (val < 0 || val > 2)
348 goto e_inval;
349 np->rxopt.bits.osrcrt = val;
350 retv = 0;
351 break;
352
353 case IPV6_RECVHOPOPTS:
354 np->rxopt.bits.hopopts = valbool;
355 retv = 0;
356 break;
357
358 case IPV6_2292HOPOPTS:
359 np->rxopt.bits.ohopopts = valbool;
360 retv = 0;
361 break;
362
363 case IPV6_RECVDSTOPTS:
364 np->rxopt.bits.dstopts = valbool;
365 retv = 0;
366 break;
367
368 case IPV6_2292DSTOPTS:
369 np->rxopt.bits.odstopts = valbool;
370 retv = 0;
371 break;
372
373 case IPV6_TCLASS:
374 if (val < -1 || val > 0xff)
375 goto e_inval;
376 np->tclass = val;
377 retv = 0;
378 break;
379
380 case IPV6_RECVTCLASS:
381 np->rxopt.bits.rxtclass = valbool;
382 retv = 0;
383 break;
384
385 case IPV6_FLOWINFO:
386 np->rxopt.bits.rxflow = valbool;
387 retv = 0;
388 break;
389
390 case IPV6_HOPOPTS:
391 case IPV6_RTHDRDSTOPTS:
392 case IPV6_RTHDR:
393 case IPV6_DSTOPTS:
394 {
395 struct ipv6_txoptions *opt;
396 if (optlen == 0)
397 optval = NULL;
398
399 /* hop-by-hop / destination options are privileged option */
400 retv = -EPERM;
401 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
402 break;
403
404 retv = -EINVAL;
405 if (optlen & 0x7 || optlen > 8 * 255)
406 break;
407
408 opt = ipv6_renew_options(sk, np->opt, optname,
409 (struct ipv6_opt_hdr __user *)optval,
410 optlen);
411 if (IS_ERR(opt)) {
412 retv = PTR_ERR(opt);
413 break;
414 }
415
416 /* routing header option needs extra check */
417 if (optname == IPV6_RTHDR && opt->srcrt) {
418 struct ipv6_rt_hdr *rthdr = opt->srcrt;
419 switch (rthdr->type) {
420 case IPV6_SRCRT_TYPE_0:
421 #ifdef CONFIG_IPV6_MIP6
422 case IPV6_SRCRT_TYPE_2:
423 #endif
424 break;
425 default:
426 goto sticky_done;
427 }
428
429 if ((rthdr->hdrlen & 1) ||
430 (rthdr->hdrlen >> 1) != rthdr->segments_left)
431 goto sticky_done;
432 }
433
434 retv = 0;
435 if (inet_sk(sk)->is_icsk) {
436 if (opt) {
437 struct inet_connection_sock *icsk = inet_csk(sk);
438 if (!((1 << sk->sk_state) &
439 (TCPF_LISTEN | TCPF_CLOSE))
440 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
441 icsk->icsk_ext_hdr_len =
442 opt->opt_flen + opt->opt_nflen;
443 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
444 }
445 }
446 opt = xchg(&np->opt, opt);
447 sk_dst_reset(sk);
448 } else {
449 write_lock(&sk->sk_dst_lock);
450 opt = xchg(&np->opt, opt);
451 write_unlock(&sk->sk_dst_lock);
452 sk_dst_reset(sk);
453 }
454 sticky_done:
455 if (opt)
456 sock_kfree_s(sk, opt, opt->tot_len);
457 break;
458 }
459
460 case IPV6_2292PKTOPTIONS:
461 {
462 struct ipv6_txoptions *opt = NULL;
463 struct msghdr msg;
464 struct flowi fl;
465 int junk;
466
467 fl.fl6_flowlabel = 0;
468 fl.oif = sk->sk_bound_dev_if;
469
470 if (optlen == 0)
471 goto update;
472
473 /* 1K is probably excessive
474 * 1K is surely not enough, 2K per standard header is 16K.
475 */
476 retv = -EINVAL;
477 if (optlen > 64*1024)
478 break;
479
480 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
481 retv = -ENOBUFS;
482 if (opt == NULL)
483 break;
484
485 memset(opt, 0, sizeof(*opt));
486 opt->tot_len = sizeof(*opt) + optlen;
487 retv = -EFAULT;
488 if (copy_from_user(opt+1, optval, optlen))
489 goto done;
490
491 msg.msg_controllen = optlen;
492 msg.msg_control = (void*)(opt+1);
493
494 retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk);
495 if (retv)
496 goto done;
497 update:
498 retv = 0;
499 if (inet_sk(sk)->is_icsk) {
500 if (opt) {
501 struct inet_connection_sock *icsk = inet_csk(sk);
502 if (!((1 << sk->sk_state) &
503 (TCPF_LISTEN | TCPF_CLOSE))
504 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
505 icsk->icsk_ext_hdr_len =
506 opt->opt_flen + opt->opt_nflen;
507 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
508 }
509 }
510 opt = xchg(&np->opt, opt);
511 sk_dst_reset(sk);
512 } else {
513 write_lock(&sk->sk_dst_lock);
514 opt = xchg(&np->opt, opt);
515 write_unlock(&sk->sk_dst_lock);
516 sk_dst_reset(sk);
517 }
518
519 done:
520 if (opt)
521 sock_kfree_s(sk, opt, opt->tot_len);
522 break;
523 }
524 case IPV6_UNICAST_HOPS:
525 if (val > 255 || val < -1)
526 goto e_inval;
527 np->hop_limit = val;
528 retv = 0;
529 break;
530
531 case IPV6_MULTICAST_HOPS:
532 if (sk->sk_type == SOCK_STREAM)
533 goto e_inval;
534 if (val > 255 || val < -1)
535 goto e_inval;
536 np->mcast_hops = val;
537 retv = 0;
538 break;
539
540 case IPV6_MULTICAST_LOOP:
541 np->mc_loop = valbool;
542 retv = 0;
543 break;
544
545 case IPV6_MULTICAST_IF:
546 if (sk->sk_type == SOCK_STREAM)
547 goto e_inval;
548 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
549 goto e_inval;
550
551 if (__dev_get_by_index(val) == NULL) {
552 retv = -ENODEV;
553 break;
554 }
555 np->mcast_oif = val;
556 retv = 0;
557 break;
558 case IPV6_ADD_MEMBERSHIP:
559 case IPV6_DROP_MEMBERSHIP:
560 {
561 struct ipv6_mreq mreq;
562
563 retv = -EFAULT;
564 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
565 break;
566
567 if (optname == IPV6_ADD_MEMBERSHIP)
568 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
569 else
570 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
571 break;
572 }
573 case IPV6_JOIN_ANYCAST:
574 case IPV6_LEAVE_ANYCAST:
575 {
576 struct ipv6_mreq mreq;
577
578 if (optlen != sizeof(struct ipv6_mreq))
579 goto e_inval;
580
581 retv = -EFAULT;
582 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
583 break;
584
585 if (optname == IPV6_JOIN_ANYCAST)
586 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
587 else
588 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
589 break;
590 }
591 case MCAST_JOIN_GROUP:
592 case MCAST_LEAVE_GROUP:
593 {
594 struct group_req greq;
595 struct sockaddr_in6 *psin6;
596
597 retv = -EFAULT;
598 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
599 break;
600 if (greq.gr_group.ss_family != AF_INET6) {
601 retv = -EADDRNOTAVAIL;
602 break;
603 }
604 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
605 if (optname == MCAST_JOIN_GROUP)
606 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
607 &psin6->sin6_addr);
608 else
609 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
610 &psin6->sin6_addr);
611 break;
612 }
613 case MCAST_JOIN_SOURCE_GROUP:
614 case MCAST_LEAVE_SOURCE_GROUP:
615 case MCAST_BLOCK_SOURCE:
616 case MCAST_UNBLOCK_SOURCE:
617 {
618 struct group_source_req greqs;
619 int omode, add;
620
621 if (optlen != sizeof(struct group_source_req))
622 goto e_inval;
623 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
624 retv = -EFAULT;
625 break;
626 }
627 if (greqs.gsr_group.ss_family != AF_INET6 ||
628 greqs.gsr_source.ss_family != AF_INET6) {
629 retv = -EADDRNOTAVAIL;
630 break;
631 }
632 if (optname == MCAST_BLOCK_SOURCE) {
633 omode = MCAST_EXCLUDE;
634 add = 1;
635 } else if (optname == MCAST_UNBLOCK_SOURCE) {
636 omode = MCAST_EXCLUDE;
637 add = 0;
638 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
639 struct sockaddr_in6 *psin6;
640
641 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
642 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
643 &psin6->sin6_addr);
644 /* prior join w/ different source is ok */
645 if (retv && retv != -EADDRINUSE)
646 break;
647 omode = MCAST_INCLUDE;
648 add = 1;
649 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
650 omode = MCAST_INCLUDE;
651 add = 0;
652 }
653 retv = ip6_mc_source(add, omode, sk, &greqs);
654 break;
655 }
656 case MCAST_MSFILTER:
657 {
658 extern int sysctl_mld_max_msf;
659 struct group_filter *gsf;
660
661 if (optlen < GROUP_FILTER_SIZE(0))
662 goto e_inval;
663 if (optlen > sysctl_optmem_max) {
664 retv = -ENOBUFS;
665 break;
666 }
667 gsf = kmalloc(optlen,GFP_KERNEL);
668 if (gsf == 0) {
669 retv = -ENOBUFS;
670 break;
671 }
672 retv = -EFAULT;
673 if (copy_from_user(gsf, optval, optlen)) {
674 kfree(gsf);
675 break;
676 }
677 /* numsrc >= (4G-140)/128 overflow in 32 bits */
678 if (gsf->gf_numsrc >= 0x1ffffffU ||
679 gsf->gf_numsrc > sysctl_mld_max_msf) {
680 kfree(gsf);
681 retv = -ENOBUFS;
682 break;
683 }
684 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
685 kfree(gsf);
686 retv = -EINVAL;
687 break;
688 }
689 retv = ip6_mc_msfilter(sk, gsf);
690 kfree(gsf);
691
692 break;
693 }
694 case IPV6_ROUTER_ALERT:
695 retv = ip6_ra_control(sk, val, NULL);
696 break;
697 case IPV6_MTU_DISCOVER:
698 if (val<0 || val>2)
699 goto e_inval;
700 np->pmtudisc = val;
701 retv = 0;
702 break;
703 case IPV6_MTU:
704 if (val && val < IPV6_MIN_MTU)
705 goto e_inval;
706 np->frag_size = val;
707 retv = 0;
708 break;
709 case IPV6_RECVERR:
710 np->recverr = valbool;
711 if (!val)
712 skb_queue_purge(&sk->sk_error_queue);
713 retv = 0;
714 break;
715 case IPV6_FLOWINFO_SEND:
716 np->sndflow = valbool;
717 retv = 0;
718 break;
719 case IPV6_FLOWLABEL_MGR:
720 retv = ipv6_flowlabel_opt(sk, optval, optlen);
721 break;
722 case IPV6_IPSEC_POLICY:
723 case IPV6_XFRM_POLICY:
724 retv = -EPERM;
725 if (!capable(CAP_NET_ADMIN))
726 break;
727 retv = xfrm_user_policy(sk, optname, optval, optlen);
728 break;
729
730 }
731 release_sock(sk);
732
733 return retv;
734
735 e_inval:
736 release_sock(sk);
737 return -EINVAL;
738 }
739
740 int ipv6_setsockopt(struct sock *sk, int level, int optname,
741 char __user *optval, int optlen)
742 {
743 int err;
744
745 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
746 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
747
748 if (level != SOL_IPV6)
749 return -ENOPROTOOPT;
750
751 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
752 #ifdef CONFIG_NETFILTER
753 /* we need to exclude all possible ENOPROTOOPTs except default case */
754 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
755 optname != IPV6_XFRM_POLICY) {
756 lock_sock(sk);
757 err = nf_setsockopt(sk, PF_INET6, optname, optval,
758 optlen);
759 release_sock(sk);
760 }
761 #endif
762 return err;
763 }
764
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_opt_hdr *hdr,
800 char __user *optval, int len)
801 {
802 if (!hdr)
803 return 0;
804 len = min_t(int, len, ipv6_optlen(hdr));
805 if (copy_to_user(optval, hdr, ipv6_optlen(hdr)))
806 return -EFAULT;
807 return len;
808 }
809
810 static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
811 char __user *optval, int __user *optlen)
812 {
813 struct ipv6_pinfo *np = inet6_sk(sk);
814 int len;
815 int val;
816
817 if (get_user(len, optlen))
818 return -EFAULT;
819 switch (optname) {
820 case IPV6_ADDRFORM:
821 if (sk->sk_protocol != IPPROTO_UDP &&
822 sk->sk_protocol != IPPROTO_UDPLITE &&
823 sk->sk_protocol != IPPROTO_TCP)
824 return -EINVAL;
825 if (sk->sk_state != TCP_ESTABLISHED)
826 return -ENOTCONN;
827 val = sk->sk_family;
828 break;
829 case MCAST_MSFILTER:
830 {
831 struct group_filter gsf;
832 int err;
833
834 if (len < GROUP_FILTER_SIZE(0))
835 return -EINVAL;
836 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
837 return -EFAULT;
838 lock_sock(sk);
839 err = ip6_mc_msfget(sk, &gsf,
840 (struct group_filter __user *)optval, optlen);
841 release_sock(sk);
842 return err;
843 }
844
845 case IPV6_2292PKTOPTIONS:
846 {
847 struct msghdr msg;
848 struct sk_buff *skb;
849
850 if (sk->sk_type != SOCK_STREAM)
851 return -ENOPROTOOPT;
852
853 msg.msg_control = optval;
854 msg.msg_controllen = len;
855 msg.msg_flags = 0;
856
857 lock_sock(sk);
858 skb = np->pktoptions;
859 if (skb)
860 atomic_inc(&skb->users);
861 release_sock(sk);
862
863 if (skb) {
864 int err = datagram_recv_ctl(sk, &msg, skb);
865 kfree_skb(skb);
866 if (err)
867 return err;
868 } else {
869 if (np->rxopt.bits.rxinfo) {
870 struct in6_pktinfo src_info;
871 src_info.ipi6_ifindex = np->mcast_oif;
872 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
873 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
874 }
875 if (np->rxopt.bits.rxhlim) {
876 int hlim = np->mcast_hops;
877 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
878 }
879 if (np->rxopt.bits.rxoinfo) {
880 struct in6_pktinfo src_info;
881 src_info.ipi6_ifindex = np->mcast_oif;
882 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
883 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
884 }
885 if (np->rxopt.bits.rxohlim) {
886 int hlim = np->mcast_hops;
887 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
888 }
889 }
890 len -= msg.msg_controllen;
891 return put_user(len, optlen);
892 }
893 case IPV6_MTU:
894 {
895 struct dst_entry *dst;
896 val = 0;
897 lock_sock(sk);
898 dst = sk_dst_get(sk);
899 if (dst) {
900 val = dst_mtu(dst);
901 dst_release(dst);
902 }
903 release_sock(sk);
904 if (!val)
905 return -ENOTCONN;
906 break;
907 }
908
909 case IPV6_V6ONLY:
910 val = np->ipv6only;
911 break;
912
913 case IPV6_RECVPKTINFO:
914 val = np->rxopt.bits.rxinfo;
915 break;
916
917 case IPV6_2292PKTINFO:
918 val = np->rxopt.bits.rxoinfo;
919 break;
920
921 case IPV6_RECVHOPLIMIT:
922 val = np->rxopt.bits.rxhlim;
923 break;
924
925 case IPV6_2292HOPLIMIT:
926 val = np->rxopt.bits.rxohlim;
927 break;
928
929 case IPV6_RECVRTHDR:
930 val = np->rxopt.bits.srcrt;
931 break;
932
933 case IPV6_2292RTHDR:
934 val = np->rxopt.bits.osrcrt;
935 break;
936
937 case IPV6_HOPOPTS:
938 case IPV6_RTHDRDSTOPTS:
939 case IPV6_RTHDR:
940 case IPV6_DSTOPTS:
941 {
942
943 lock_sock(sk);
944 len = ipv6_getsockopt_sticky(sk, np->opt->hopopt,
945 optval, len);
946 release_sock(sk);
947 return put_user(len, optlen);
948 }
949
950 case IPV6_RECVHOPOPTS:
951 val = np->rxopt.bits.hopopts;
952 break;
953
954 case IPV6_2292HOPOPTS:
955 val = np->rxopt.bits.ohopopts;
956 break;
957
958 case IPV6_RECVDSTOPTS:
959 val = np->rxopt.bits.dstopts;
960 break;
961
962 case IPV6_2292DSTOPTS:
963 val = np->rxopt.bits.odstopts;
964 break;
965
966 case IPV6_TCLASS:
967 val = np->tclass;
968 if (val < 0)
969 val = 0;
970 break;
971
972 case IPV6_RECVTCLASS:
973 val = np->rxopt.bits.rxtclass;
974 break;
975
976 case IPV6_FLOWINFO:
977 val = np->rxopt.bits.rxflow;
978 break;
979
980 case IPV6_UNICAST_HOPS:
981 val = np->hop_limit;
982 break;
983
984 case IPV6_MULTICAST_HOPS:
985 val = np->mcast_hops;
986 break;
987
988 case IPV6_MULTICAST_LOOP:
989 val = np->mc_loop;
990 break;
991
992 case IPV6_MULTICAST_IF:
993 val = np->mcast_oif;
994 break;
995
996 case IPV6_MTU_DISCOVER:
997 val = np->pmtudisc;
998 break;
999
1000 case IPV6_RECVERR:
1001 val = np->recverr;
1002 break;
1003
1004 case IPV6_FLOWINFO_SEND:
1005 val = np->sndflow;
1006 break;
1007
1008 default:
1009 return -EINVAL;
1010 }
1011 len = min_t(unsigned int, sizeof(int), len);
1012 if(put_user(len, optlen))
1013 return -EFAULT;
1014 if(copy_to_user(optval,&val,len))
1015 return -EFAULT;
1016 return 0;
1017 }
1018
1019 int ipv6_getsockopt(struct sock *sk, int level, int optname,
1020 char __user *optval, int __user *optlen)
1021 {
1022 int err;
1023
1024 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
1025 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1026
1027 if(level != SOL_IPV6)
1028 return -ENOPROTOOPT;
1029
1030 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1031 #ifdef CONFIG_NETFILTER
1032 /* we need to exclude all possible EINVALs except default case */
1033 if (err == -EINVAL && optname != IPV6_ADDRFORM &&
1034 optname != MCAST_MSFILTER) {
1035 int len;
1036
1037 if (get_user(len, optlen))
1038 return -EFAULT;
1039
1040 lock_sock(sk);
1041 err = nf_getsockopt(sk, PF_INET6, optname, optval,
1042 &len);
1043 release_sock(sk);
1044 if (err >= 0)
1045 err = put_user(len, optlen);
1046 }
1047 #endif
1048 return err;
1049 }
1050
1051 #ifdef CONFIG_COMPAT
1052 int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
1053 char __user *optval, int __user *optlen)
1054 {
1055 int err;
1056
1057 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
1058 if (udp_prot.compat_getsockopt != NULL)
1059 return udp_prot.compat_getsockopt(sk, level, optname,
1060 optval, optlen);
1061 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1062 }
1063
1064 if (level != SOL_IPV6)
1065 return -ENOPROTOOPT;
1066
1067 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1068 #ifdef CONFIG_NETFILTER
1069 /* we need to exclude all possible EINVALs except default case */
1070 if (err == -EINVAL && optname != IPV6_ADDRFORM &&
1071 optname != MCAST_MSFILTER) {
1072 int len;
1073
1074 if (get_user(len, optlen))
1075 return -EFAULT;
1076
1077 lock_sock(sk);
1078 err = compat_nf_getsockopt(sk, PF_INET6,
1079 optname, optval, &len);
1080 release_sock(sk);
1081 if (err >= 0)
1082 err = put_user(len, optlen);
1083 }
1084 #endif
1085 return err;
1086 }
1087
1088 EXPORT_SYMBOL(compat_ipv6_getsockopt);
1089 #endif
1090
1091 void __init ipv6_packet_init(void)
1092 {
1093 dev_add_pack(&ipv6_packet_type);
1094 }
1095
1096 void ipv6_packet_cleanup(void)
1097 {
1098 dev_remove_pack(&ipv6_packet_type);
1099 }
hh.org GIT migration