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[PATCH] PCIE: make bus_id for PCI Express devices unique
[linux/fpc-iii.git] / net / ipv6 / ipv6_sockglue.c
blobc63868dd2ca29c711e3153234578bc8368f4d8d7
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/config.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/xfrm.h>
55
56 #include <asm/uaccess.h>
57
58 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly;
59
60 static struct packet_type ipv6_packet_type = {
61 .type = __constant_htons(ETH_P_IPV6),
62 .func = ipv6_rcv,
63 };
64
65 struct ip6_ra_chain *ip6_ra_chain;
66 DEFINE_RWLOCK(ip6_ra_lock);
67
68 int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *))
69 {
70 struct ip6_ra_chain *ra, *new_ra, **rap;
71
72 /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
73 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW)
74 return -EINVAL;
75
76 new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
77
78 write_lock_bh(&ip6_ra_lock);
79 for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
80 if (ra->sk == sk) {
81 if (sel>=0) {
82 write_unlock_bh(&ip6_ra_lock);
83 kfree(new_ra);
84 return -EADDRINUSE;
85 }
86
87 *rap = ra->next;
88 write_unlock_bh(&ip6_ra_lock);
89
90 if (ra->destructor)
91 ra->destructor(sk);
92 sock_put(sk);
93 kfree(ra);
94 return 0;
95 }
96 }
97 if (new_ra == NULL) {
98 write_unlock_bh(&ip6_ra_lock);
99 return -ENOBUFS;
100 }
101 new_ra->sk = sk;
102 new_ra->sel = sel;
103 new_ra->destructor = destructor;
104 new_ra->next = ra;
105 *rap = new_ra;
106 sock_hold(sk);
107 write_unlock_bh(&ip6_ra_lock);
108 return 0;
109 }
110
111 int ipv6_setsockopt(struct sock *sk, int level, int optname,
112 char __user *optval, int optlen)
113 {
114 struct ipv6_pinfo *np = inet6_sk(sk);
115 int val, valbool;
116 int retv = -ENOPROTOOPT;
117
118 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
119 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
120
121 if(level!=SOL_IPV6)
122 goto out;
123
124 if (optval == NULL)
125 val=0;
126 else if (get_user(val, (int __user *) optval))
127 return -EFAULT;
128
129 valbool = (val!=0);
130
131 lock_sock(sk);
132
133 switch (optname) {
134
135 case IPV6_ADDRFORM:
136 if (val == PF_INET) {
137 struct ipv6_txoptions *opt;
138 struct sk_buff *pktopt;
139
140 if (sk->sk_protocol != IPPROTO_UDP &&
141 sk->sk_protocol != IPPROTO_TCP)
142 break;
143
144 if (sk->sk_state != TCP_ESTABLISHED) {
145 retv = -ENOTCONN;
146 break;
147 }
148
149 if (ipv6_only_sock(sk) ||
150 !(ipv6_addr_type(&np->daddr) & IPV6_ADDR_MAPPED)) {
151 retv = -EADDRNOTAVAIL;
152 break;
153 }
154
155 fl6_free_socklist(sk);
156 ipv6_sock_mc_close(sk);
157
158 /*
159 * Sock is moving from IPv6 to IPv4 (sk_prot), so
160 * remove it from the refcnt debug socks count in the
161 * original family...
162 */
163 sk_refcnt_debug_dec(sk);
164
165 if (sk->sk_protocol == IPPROTO_TCP) {
166 struct inet_connection_sock *icsk = inet_csk(sk);
167
168 local_bh_disable();
169 sock_prot_dec_use(sk->sk_prot);
170 sock_prot_inc_use(&tcp_prot);
171 local_bh_enable();
172 sk->sk_prot = &tcp_prot;
173 icsk->icsk_af_ops = &ipv4_specific;
174 sk->sk_socket->ops = &inet_stream_ops;
175 sk->sk_family = PF_INET;
176 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
177 } else {
178 local_bh_disable();
179 sock_prot_dec_use(sk->sk_prot);
180 sock_prot_inc_use(&udp_prot);
181 local_bh_enable();
182 sk->sk_prot = &udp_prot;
183 sk->sk_socket->ops = &inet_dgram_ops;
184 sk->sk_family = PF_INET;
185 }
186 opt = xchg(&np->opt, NULL);
187 if (opt)
188 sock_kfree_s(sk, opt, opt->tot_len);
189 pktopt = xchg(&np->pktoptions, NULL);
190 if (pktopt)
191 kfree_skb(pktopt);
192
193 sk->sk_destruct = inet_sock_destruct;
194 /*
195 * ... and add it to the refcnt debug socks count
196 * in the new family. -acme
197 */
198 sk_refcnt_debug_inc(sk);
199 module_put(THIS_MODULE);
200 retv = 0;
201 break;
202 }
203 goto e_inval;
204
205 case IPV6_V6ONLY:
206 if (inet_sk(sk)->num)
207 goto e_inval;
208 np->ipv6only = valbool;
209 retv = 0;
210 break;
211
212 case IPV6_RECVPKTINFO:
213 np->rxopt.bits.rxinfo = valbool;
214 retv = 0;
215 break;
216
217 case IPV6_2292PKTINFO:
218 np->rxopt.bits.rxoinfo = valbool;
219 retv = 0;
220 break;
221
222 case IPV6_RECVHOPLIMIT:
223 np->rxopt.bits.rxhlim = valbool;
224 retv = 0;
225 break;
226
227 case IPV6_2292HOPLIMIT:
228 np->rxopt.bits.rxohlim = valbool;
229 retv = 0;
230 break;
231
232 case IPV6_RECVRTHDR:
233 if (val < 0 || val > 2)
234 goto e_inval;
235 np->rxopt.bits.srcrt = val;
236 retv = 0;
237 break;
238
239 case IPV6_2292RTHDR:
240 if (val < 0 || val > 2)
241 goto e_inval;
242 np->rxopt.bits.osrcrt = val;
243 retv = 0;
244 break;
245
246 case IPV6_RECVHOPOPTS:
247 np->rxopt.bits.hopopts = valbool;
248 retv = 0;
249 break;
250
251 case IPV6_2292HOPOPTS:
252 np->rxopt.bits.ohopopts = valbool;
253 retv = 0;
254 break;
255
256 case IPV6_RECVDSTOPTS:
257 np->rxopt.bits.dstopts = valbool;
258 retv = 0;
259 break;
260
261 case IPV6_2292DSTOPTS:
262 np->rxopt.bits.odstopts = valbool;
263 retv = 0;
264 break;
265
266 case IPV6_TCLASS:
267 if (val < 0 || val > 0xff)
268 goto e_inval;
269 np->tclass = val;
270 retv = 0;
271 break;
272
273 case IPV6_RECVTCLASS:
274 np->rxopt.bits.rxtclass = valbool;
275 retv = 0;
276 break;
277
278 case IPV6_FLOWINFO:
279 np->rxopt.bits.rxflow = valbool;
280 retv = 0;
281 break;
282
283 case IPV6_HOPOPTS:
284 case IPV6_RTHDRDSTOPTS:
285 case IPV6_RTHDR:
286 case IPV6_DSTOPTS:
287 {
288 struct ipv6_txoptions *opt;
289 if (optlen == 0)
290 optval = NULL;
291
292 /* hop-by-hop / destination options are privileged option */
293 retv = -EPERM;
294 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
295 break;
296
297 retv = -EINVAL;
298 if (optlen & 0x7 || optlen > 8 * 255)
299 break;
300
301 opt = ipv6_renew_options(sk, np->opt, optname,
302 (struct ipv6_opt_hdr __user *)optval,
303 optlen);
304 if (IS_ERR(opt)) {
305 retv = PTR_ERR(opt);
306 break;
307 }
308
309 /* routing header option needs extra check */
310 if (optname == IPV6_RTHDR && opt->srcrt) {
311 struct ipv6_rt_hdr *rthdr = opt->srcrt;
312 if (rthdr->type)
313 goto sticky_done;
314 if ((rthdr->hdrlen & 1) ||
315 (rthdr->hdrlen >> 1) != rthdr->segments_left)
316 goto sticky_done;
317 }
318
319 retv = 0;
320 if (inet_sk(sk)->is_icsk) {
321 if (opt) {
322 struct inet_connection_sock *icsk = inet_csk(sk);
323 if (!((1 << sk->sk_state) &
324 (TCPF_LISTEN | TCPF_CLOSE))
325 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
326 icsk->icsk_ext_hdr_len =
327 opt->opt_flen + opt->opt_nflen;
328 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
329 }
330 }
331 opt = xchg(&np->opt, opt);
332 sk_dst_reset(sk);
333 } else {
334 write_lock(&sk->sk_dst_lock);
335 opt = xchg(&np->opt, opt);
336 write_unlock(&sk->sk_dst_lock);
337 sk_dst_reset(sk);
338 }
339 sticky_done:
340 if (opt)
341 sock_kfree_s(sk, opt, opt->tot_len);
342 break;
343 }
344
345 case IPV6_2292PKTOPTIONS:
346 {
347 struct ipv6_txoptions *opt = NULL;
348 struct msghdr msg;
349 struct flowi fl;
350 int junk;
351
352 fl.fl6_flowlabel = 0;
353 fl.oif = sk->sk_bound_dev_if;
354
355 if (optlen == 0)
356 goto update;
357
358 /* 1K is probably excessive
359 * 1K is surely not enough, 2K per standard header is 16K.
360 */
361 retv = -EINVAL;
362 if (optlen > 64*1024)
363 break;
364
365 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
366 retv = -ENOBUFS;
367 if (opt == NULL)
368 break;
369
370 memset(opt, 0, sizeof(*opt));
371 opt->tot_len = sizeof(*opt) + optlen;
372 retv = -EFAULT;
373 if (copy_from_user(opt+1, optval, optlen))
374 goto done;
375
376 msg.msg_controllen = optlen;
377 msg.msg_control = (void*)(opt+1);
378
379 retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk);
380 if (retv)
381 goto done;
382 update:
383 retv = 0;
384 if (inet_sk(sk)->is_icsk) {
385 if (opt) {
386 struct inet_connection_sock *icsk = inet_csk(sk);
387 if (!((1 << sk->sk_state) &
388 (TCPF_LISTEN | TCPF_CLOSE))
389 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
390 icsk->icsk_ext_hdr_len =
391 opt->opt_flen + opt->opt_nflen;
392 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
393 }
394 }
395 opt = xchg(&np->opt, opt);
396 sk_dst_reset(sk);
397 } else {
398 write_lock(&sk->sk_dst_lock);
399 opt = xchg(&np->opt, opt);
400 write_unlock(&sk->sk_dst_lock);
401 sk_dst_reset(sk);
402 }
403
404 done:
405 if (opt)
406 sock_kfree_s(sk, opt, opt->tot_len);
407 break;
408 }
409 case IPV6_UNICAST_HOPS:
410 if (val > 255 || val < -1)
411 goto e_inval;
412 np->hop_limit = val;
413 retv = 0;
414 break;
415
416 case IPV6_MULTICAST_HOPS:
417 if (sk->sk_type == SOCK_STREAM)
418 goto e_inval;
419 if (val > 255 || val < -1)
420 goto e_inval;
421 np->mcast_hops = val;
422 retv = 0;
423 break;
424
425 case IPV6_MULTICAST_LOOP:
426 np->mc_loop = valbool;
427 retv = 0;
428 break;
429
430 case IPV6_MULTICAST_IF:
431 if (sk->sk_type == SOCK_STREAM)
432 goto e_inval;
433 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
434 goto e_inval;
435
436 if (__dev_get_by_index(val) == NULL) {
437 retv = -ENODEV;
438 break;
439 }
440 np->mcast_oif = val;
441 retv = 0;
442 break;
443 case IPV6_ADD_MEMBERSHIP:
444 case IPV6_DROP_MEMBERSHIP:
445 {
446 struct ipv6_mreq mreq;
447
448 retv = -EFAULT;
449 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
450 break;
451
452 if (optname == IPV6_ADD_MEMBERSHIP)
453 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
454 else
455 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
456 break;
457 }
458 case IPV6_JOIN_ANYCAST:
459 case IPV6_LEAVE_ANYCAST:
460 {
461 struct ipv6_mreq mreq;
462
463 if (optlen != sizeof(struct ipv6_mreq))
464 goto e_inval;
465
466 retv = -EFAULT;
467 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
468 break;
469
470 if (optname == IPV6_JOIN_ANYCAST)
471 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
472 else
473 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
474 break;
475 }
476 case MCAST_JOIN_GROUP:
477 case MCAST_LEAVE_GROUP:
478 {
479 struct group_req greq;
480 struct sockaddr_in6 *psin6;
481
482 retv = -EFAULT;
483 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
484 break;
485 if (greq.gr_group.ss_family != AF_INET6) {
486 retv = -EADDRNOTAVAIL;
487 break;
488 }
489 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
490 if (optname == MCAST_JOIN_GROUP)
491 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
492 &psin6->sin6_addr);
493 else
494 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
495 &psin6->sin6_addr);
496 break;
497 }
498 case MCAST_JOIN_SOURCE_GROUP:
499 case MCAST_LEAVE_SOURCE_GROUP:
500 case MCAST_BLOCK_SOURCE:
501 case MCAST_UNBLOCK_SOURCE:
502 {
503 struct group_source_req greqs;
504 int omode, add;
505
506 if (optlen != sizeof(struct group_source_req))
507 goto e_inval;
508 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
509 retv = -EFAULT;
510 break;
511 }
512 if (greqs.gsr_group.ss_family != AF_INET6 ||
513 greqs.gsr_source.ss_family != AF_INET6) {
514 retv = -EADDRNOTAVAIL;
515 break;
516 }
517 if (optname == MCAST_BLOCK_SOURCE) {
518 omode = MCAST_EXCLUDE;
519 add = 1;
520 } else if (optname == MCAST_UNBLOCK_SOURCE) {
521 omode = MCAST_EXCLUDE;
522 add = 0;
523 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
524 struct sockaddr_in6 *psin6;
525
526 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
527 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
528 &psin6->sin6_addr);
529 /* prior join w/ different source is ok */
530 if (retv && retv != -EADDRINUSE)
531 break;
532 omode = MCAST_INCLUDE;
533 add = 1;
534 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
535 omode = MCAST_INCLUDE;
536 add = 0;
537 }
538 retv = ip6_mc_source(add, omode, sk, &greqs);
539 break;
540 }
541 case MCAST_MSFILTER:
542 {
543 extern int sysctl_mld_max_msf;
544 struct group_filter *gsf;
545
546 if (optlen < GROUP_FILTER_SIZE(0))
547 goto e_inval;
548 if (optlen > sysctl_optmem_max) {
549 retv = -ENOBUFS;
550 break;
551 }
552 gsf = (struct group_filter *)kmalloc(optlen,GFP_KERNEL);
553 if (gsf == 0) {
554 retv = -ENOBUFS;
555 break;
556 }
557 retv = -EFAULT;
558 if (copy_from_user(gsf, optval, optlen)) {
559 kfree(gsf);
560 break;
561 }
562 /* numsrc >= (4G-140)/128 overflow in 32 bits */
563 if (gsf->gf_numsrc >= 0x1ffffffU ||
564 gsf->gf_numsrc > sysctl_mld_max_msf) {
565 kfree(gsf);
566 retv = -ENOBUFS;
567 break;
568 }
569 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
570 kfree(gsf);
571 retv = -EINVAL;
572 break;
573 }
574 retv = ip6_mc_msfilter(sk, gsf);
575 kfree(gsf);
576
577 break;
578 }
579 case IPV6_ROUTER_ALERT:
580 retv = ip6_ra_control(sk, val, NULL);
581 break;
582 case IPV6_MTU_DISCOVER:
583 if (val<0 || val>2)
584 goto e_inval;
585 np->pmtudisc = val;
586 retv = 0;
587 break;
588 case IPV6_MTU:
589 if (val && val < IPV6_MIN_MTU)
590 goto e_inval;
591 np->frag_size = val;
592 retv = 0;
593 break;
594 case IPV6_RECVERR:
595 np->recverr = valbool;
596 if (!val)
597 skb_queue_purge(&sk->sk_error_queue);
598 retv = 0;
599 break;
600 case IPV6_FLOWINFO_SEND:
601 np->sndflow = valbool;
602 retv = 0;
603 break;
604 case IPV6_FLOWLABEL_MGR:
605 retv = ipv6_flowlabel_opt(sk, optval, optlen);
606 break;
607 case IPV6_IPSEC_POLICY:
608 case IPV6_XFRM_POLICY:
609 retv = -EPERM;
610 if (!capable(CAP_NET_ADMIN))
611 break;
612 retv = xfrm_user_policy(sk, optname, optval, optlen);
613 break;
614
615 #ifdef CONFIG_NETFILTER
616 default:
617 retv = nf_setsockopt(sk, PF_INET6, optname, optval,
618 optlen);
619 break;
620 #endif
621
622 }
623 release_sock(sk);
624
625 out:
626 return retv;
627
628 e_inval:
629 release_sock(sk);
630 return -EINVAL;
631 }
632
633 static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_opt_hdr *hdr,
634 char __user *optval, int len)
635 {
636 if (!hdr)
637 return 0;
638 len = min_t(int, len, ipv6_optlen(hdr));
639 if (copy_to_user(optval, hdr, ipv6_optlen(hdr)))
640 return -EFAULT;
641 return len;
642 }
643
644 int ipv6_getsockopt(struct sock *sk, int level, int optname,
645 char __user *optval, int __user *optlen)
646 {
647 struct ipv6_pinfo *np = inet6_sk(sk);
648 int len;
649 int val;
650
651 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
652 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
653 if(level!=SOL_IPV6)
654 return -ENOPROTOOPT;
655 if (get_user(len, optlen))
656 return -EFAULT;
657 switch (optname) {
658 case IPV6_ADDRFORM:
659 if (sk->sk_protocol != IPPROTO_UDP &&
660 sk->sk_protocol != IPPROTO_TCP)
661 return -EINVAL;
662 if (sk->sk_state != TCP_ESTABLISHED)
663 return -ENOTCONN;
664 val = sk->sk_family;
665 break;
666 case MCAST_MSFILTER:
667 {
668 struct group_filter gsf;
669 int err;
670
671 if (len < GROUP_FILTER_SIZE(0))
672 return -EINVAL;
673 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
674 return -EFAULT;
675 lock_sock(sk);
676 err = ip6_mc_msfget(sk, &gsf,
677 (struct group_filter __user *)optval, optlen);
678 release_sock(sk);
679 return err;
680 }
681
682 case IPV6_2292PKTOPTIONS:
683 {
684 struct msghdr msg;
685 struct sk_buff *skb;
686
687 if (sk->sk_type != SOCK_STREAM)
688 return -ENOPROTOOPT;
689
690 msg.msg_control = optval;
691 msg.msg_controllen = len;
692 msg.msg_flags = 0;
693
694 lock_sock(sk);
695 skb = np->pktoptions;
696 if (skb)
697 atomic_inc(&skb->users);
698 release_sock(sk);
699
700 if (skb) {
701 int err = datagram_recv_ctl(sk, &msg, skb);
702 kfree_skb(skb);
703 if (err)
704 return err;
705 } else {
706 if (np->rxopt.bits.rxinfo) {
707 struct in6_pktinfo src_info;
708 src_info.ipi6_ifindex = np->mcast_oif;
709 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
710 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
711 }
712 if (np->rxopt.bits.rxhlim) {
713 int hlim = np->mcast_hops;
714 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
715 }
716 if (np->rxopt.bits.rxoinfo) {
717 struct in6_pktinfo src_info;
718 src_info.ipi6_ifindex = np->mcast_oif;
719 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
720 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
721 }
722 if (np->rxopt.bits.rxohlim) {
723 int hlim = np->mcast_hops;
724 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
725 }
726 }
727 len -= msg.msg_controllen;
728 return put_user(len, optlen);
729 }
730 case IPV6_MTU:
731 {
732 struct dst_entry *dst;
733 val = 0;
734 lock_sock(sk);
735 dst = sk_dst_get(sk);
736 if (dst) {
737 val = dst_mtu(dst);
738 dst_release(dst);
739 }
740 release_sock(sk);
741 if (!val)
742 return -ENOTCONN;
743 break;
744 }
745
746 case IPV6_V6ONLY:
747 val = np->ipv6only;
748 break;
749
750 case IPV6_RECVPKTINFO:
751 val = np->rxopt.bits.rxinfo;
752 break;
753
754 case IPV6_2292PKTINFO:
755 val = np->rxopt.bits.rxoinfo;
756 break;
757
758 case IPV6_RECVHOPLIMIT:
759 val = np->rxopt.bits.rxhlim;
760 break;
761
762 case IPV6_2292HOPLIMIT:
763 val = np->rxopt.bits.rxohlim;
764 break;
765
766 case IPV6_RECVRTHDR:
767 val = np->rxopt.bits.srcrt;
768 break;
769
770 case IPV6_2292RTHDR:
771 val = np->rxopt.bits.osrcrt;
772 break;
773
774 case IPV6_HOPOPTS:
775 case IPV6_RTHDRDSTOPTS:
776 case IPV6_RTHDR:
777 case IPV6_DSTOPTS:
778 {
779
780 lock_sock(sk);
781 len = ipv6_getsockopt_sticky(sk, np->opt->hopopt,
782 optval, len);
783 release_sock(sk);
784 return put_user(len, optlen);
785 }
786
787 case IPV6_RECVHOPOPTS:
788 val = np->rxopt.bits.hopopts;
789 break;
790
791 case IPV6_2292HOPOPTS:
792 val = np->rxopt.bits.ohopopts;
793 break;
794
795 case IPV6_RECVDSTOPTS:
796 val = np->rxopt.bits.dstopts;
797 break;
798
799 case IPV6_2292DSTOPTS:
800 val = np->rxopt.bits.odstopts;
801 break;
802
803 case IPV6_TCLASS:
804 val = np->tclass;
805 break;
806
807 case IPV6_RECVTCLASS:
808 val = np->rxopt.bits.rxtclass;
809 break;
810
811 case IPV6_FLOWINFO:
812 val = np->rxopt.bits.rxflow;
813 break;
814
815 case IPV6_UNICAST_HOPS:
816 val = np->hop_limit;
817 break;
818
819 case IPV6_MULTICAST_HOPS:
820 val = np->mcast_hops;
821 break;
822
823 case IPV6_MULTICAST_LOOP:
824 val = np->mc_loop;
825 break;
826
827 case IPV6_MULTICAST_IF:
828 val = np->mcast_oif;
829 break;
830
831 case IPV6_MTU_DISCOVER:
832 val = np->pmtudisc;
833 break;
834
835 case IPV6_RECVERR:
836 val = np->recverr;
837 break;
838
839 case IPV6_FLOWINFO_SEND:
840 val = np->sndflow;
841 break;
842
843 default:
844 #ifdef CONFIG_NETFILTER
845 lock_sock(sk);
846 val = nf_getsockopt(sk, PF_INET6, optname, optval,
847 &len);
848 release_sock(sk);
849 if (val >= 0)
850 val = put_user(len, optlen);
851 return val;
852 #else
853 return -EINVAL;
854 #endif
855 }
856 len = min_t(unsigned int, sizeof(int), len);
857 if(put_user(len, optlen))
858 return -EFAULT;
859 if(copy_to_user(optval,&val,len))
860 return -EFAULT;
861 return 0;
862 }
863
864 void __init ipv6_packet_init(void)
865 {
866 dev_add_pack(&ipv6_packet_type);
867 }
868
869 void ipv6_packet_cleanup(void)
870 {
871 dev_remove_pack(&ipv6_packet_type);
872 }
Linux with added FPC-III support