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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / net / ipv6 / ipv6_sockglue.c
blob1681eb01b86c3c3332f20ae302e7194d3d49f48e
1
2
3 #include <linux/module.h>
4 #include <linux/capability.h>
5 #include <linux/errno.h>
6 #include <linux/types.h>
7 #include <linux/socket.h>
8 #include <linux/sockios.h>
9 #include <linux/net.h>
10 #include <linux/in6.h>
11 #include <linux/mroute6.h>
12 #include <linux/netdevice.h>
13 #include <linux/if_arp.h>
14 #include <linux/init.h>
15 #include <linux/sysctl.h>
16 #include <linux/netfilter.h>
17 #include <linux/slab.h>
18
19 #include <net/sock.h>
20 #include <net/snmp.h>
21 #include <net/ipv6.h>
22 #include <net/ndisc.h>
23 #include <net/protocol.h>
24 #include <net/transp_v6.h>
25 #include <net/ip6_route.h>
26 #include <net/addrconf.h>
27 #include <net/inet_common.h>
28 #include <net/tcp.h>
29 #include <net/udp.h>
30 #include <net/udplite.h>
31 #include <net/xfrm.h>
32 #include <net/compat.h>
33
34 #include <asm/uaccess.h>
35
36 struct ip6_ra_chain *ip6_ra_chain;
37 DEFINE_RWLOCK(ip6_ra_lock);
38
39 int ip6_ra_control(struct sock *sk, int sel)
40 {
41 struct ip6_ra_chain *ra, *new_ra, **rap;
42
43 /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
44 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num != IPPROTO_RAW)
45 return -ENOPROTOOPT;
46
47 new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
48
49 write_lock_bh(&ip6_ra_lock);
50 for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
51 if (ra->sk == sk) {
52 if (sel>=0) {
53 write_unlock_bh(&ip6_ra_lock);
54 kfree(new_ra);
55 return -EADDRINUSE;
56 }
57
58 *rap = ra->next;
59 write_unlock_bh(&ip6_ra_lock);
60
61 sock_put(sk);
62 kfree(ra);
63 return 0;
64 }
65 }
66 if (new_ra == NULL) {
67 write_unlock_bh(&ip6_ra_lock);
68 return -ENOBUFS;
69 }
70 new_ra->sk = sk;
71 new_ra->sel = sel;
72 new_ra->next = ra;
73 *rap = new_ra;
74 sock_hold(sk);
75 write_unlock_bh(&ip6_ra_lock);
76 return 0;
77 }
78
79 static
80 struct ipv6_txoptions *ipv6_update_options(struct sock *sk,
81 struct ipv6_txoptions *opt)
82 {
83 if (inet_sk(sk)->is_icsk) {
84 if (opt &&
85 !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
86 inet_sk(sk)->inet_daddr != LOOPBACK4_IPV6) {
87 struct inet_connection_sock *icsk = inet_csk(sk);
88 icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen;
89 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
90 }
91 opt = xchg(&inet6_sk(sk)->opt, opt);
92 } else {
93 spin_lock(&sk->sk_dst_lock);
94 opt = xchg(&inet6_sk(sk)->opt, opt);
95 spin_unlock(&sk->sk_dst_lock);
96 }
97 sk_dst_reset(sk);
98
99 return opt;
100 }
101
102 static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
103 char __user *optval, unsigned int optlen)
104 {
105 struct ipv6_pinfo *np = inet6_sk(sk);
106 struct net *net = sock_net(sk);
107 int val, valbool;
108 int retv = -ENOPROTOOPT;
109
110 if (optval == NULL)
111 val=0;
112 else {
113 if (optlen >= sizeof(int)) {
114 if (get_user(val, (int __user *) optval))
115 return -EFAULT;
116 } else
117 val = 0;
118 }
119
120 valbool = (val!=0);
121
122 if (ip6_mroute_opt(optname))
123 return ip6_mroute_setsockopt(sk, optname, optval, optlen);
124
125 lock_sock(sk);
126
127 switch (optname) {
128
129 case IPV6_ADDRFORM:
130 if (optlen < sizeof(int))
131 goto e_inval;
132 if (val == PF_INET) {
133 struct ipv6_txoptions *opt;
134 struct sk_buff *pktopt;
135
136 if (sk->sk_type == SOCK_RAW)
137 break;
138
139 if (sk->sk_protocol == IPPROTO_UDP ||
140 sk->sk_protocol == IPPROTO_UDPLITE) {
141 struct udp_sock *up = udp_sk(sk);
142 if (up->pending == AF_INET6) {
143 retv = -EBUSY;
144 break;
145 }
146 } else if (sk->sk_protocol != IPPROTO_TCP)
147 break;
148
149 if (sk->sk_state != TCP_ESTABLISHED) {
150 retv = -ENOTCONN;
151 break;
152 }
153
154 if (ipv6_only_sock(sk) ||
155 !ipv6_addr_v4mapped(&np->daddr)) {
156 retv = -EADDRNOTAVAIL;
157 break;
158 }
159
160 fl6_free_socklist(sk);
161 ipv6_sock_mc_close(sk);
162
163 /*
164 * Sock is moving from IPv6 to IPv4 (sk_prot), so
165 * remove it from the refcnt debug socks count in the
166 * original family...
167 */
168 sk_refcnt_debug_dec(sk);
169
170 if (sk->sk_protocol == IPPROTO_TCP) {
171 struct inet_connection_sock *icsk = inet_csk(sk);
172 local_bh_disable();
173 sock_prot_inuse_add(net, sk->sk_prot, -1);
174 sock_prot_inuse_add(net, &tcp_prot, 1);
175 local_bh_enable();
176 sk->sk_prot = &tcp_prot;
177 icsk->icsk_af_ops = &ipv4_specific;
178 sk->sk_socket->ops = &inet_stream_ops;
179 sk->sk_family = PF_INET;
180 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
181 } else {
182 struct proto *prot = &udp_prot;
183
184 if (sk->sk_protocol == IPPROTO_UDPLITE)
185 prot = &udplite_prot;
186 local_bh_disable();
187 sock_prot_inuse_add(net, sk->sk_prot, -1);
188 sock_prot_inuse_add(net, prot, 1);
189 local_bh_enable();
190 sk->sk_prot = prot;
191 sk->sk_socket->ops = &inet_dgram_ops;
192 sk->sk_family = PF_INET;
193 }
194 opt = xchg(&np->opt, NULL);
195 if (opt)
196 sock_kfree_s(sk, opt, opt->tot_len);
197 pktopt = xchg(&np->pktoptions, NULL);
198 kfree_skb(pktopt);
199
200 sk->sk_destruct = inet_sock_destruct;
201 /*
202 * ... and add it to the refcnt debug socks count
203 * in the new family. -acme
204 */
205 sk_refcnt_debug_inc(sk);
206 module_put(THIS_MODULE);
207 retv = 0;
208 break;
209 }
210 goto e_inval;
211
212 case IPV6_V6ONLY:
213 if (optlen < sizeof(int) ||
214 inet_sk(sk)->inet_num)
215 goto e_inval;
216 np->ipv6only = valbool;
217 retv = 0;
218 break;
219
220 case IPV6_RECVPKTINFO:
221 if (optlen < sizeof(int))
222 goto e_inval;
223 np->rxopt.bits.rxinfo = valbool;
224 retv = 0;
225 break;
226
227 case IPV6_2292PKTINFO:
228 if (optlen < sizeof(int))
229 goto e_inval;
230 np->rxopt.bits.rxoinfo = valbool;
231 retv = 0;
232 break;
233
234 case IPV6_RECVHOPLIMIT:
235 if (optlen < sizeof(int))
236 goto e_inval;
237 np->rxopt.bits.rxhlim = valbool;
238 retv = 0;
239 break;
240
241 case IPV6_2292HOPLIMIT:
242 if (optlen < sizeof(int))
243 goto e_inval;
244 np->rxopt.bits.rxohlim = valbool;
245 retv = 0;
246 break;
247
248 case IPV6_RECVRTHDR:
249 if (optlen < sizeof(int))
250 goto e_inval;
251 np->rxopt.bits.srcrt = valbool;
252 retv = 0;
253 break;
254
255 case IPV6_2292RTHDR:
256 if (optlen < sizeof(int))
257 goto e_inval;
258 np->rxopt.bits.osrcrt = valbool;
259 retv = 0;
260 break;
261
262 case IPV6_RECVHOPOPTS:
263 if (optlen < sizeof(int))
264 goto e_inval;
265 np->rxopt.bits.hopopts = valbool;
266 retv = 0;
267 break;
268
269 case IPV6_2292HOPOPTS:
270 if (optlen < sizeof(int))
271 goto e_inval;
272 np->rxopt.bits.ohopopts = valbool;
273 retv = 0;
274 break;
275
276 case IPV6_RECVDSTOPTS:
277 if (optlen < sizeof(int))
278 goto e_inval;
279 np->rxopt.bits.dstopts = valbool;
280 retv = 0;
281 break;
282
283 case IPV6_2292DSTOPTS:
284 if (optlen < sizeof(int))
285 goto e_inval;
286 np->rxopt.bits.odstopts = valbool;
287 retv = 0;
288 break;
289
290 case IPV6_TCLASS:
291 if (optlen < sizeof(int))
292 goto e_inval;
293 if (val < -1 || val > 0xff)
294 goto e_inval;
295 /* RFC 3542, 6.5: default traffic class of 0x0 */
296 if (val == -1)
297 val = 0;
298 np->tclass = val;
299 retv = 0;
300 break;
301
302 case IPV6_RECVTCLASS:
303 if (optlen < sizeof(int))
304 goto e_inval;
305 np->rxopt.bits.rxtclass = valbool;
306 retv = 0;
307 break;
308
309 case IPV6_FLOWINFO:
310 if (optlen < sizeof(int))
311 goto e_inval;
312 np->rxopt.bits.rxflow = valbool;
313 retv = 0;
314 break;
315
316 case IPV6_RECVPATHMTU:
317 if (optlen < sizeof(int))
318 goto e_inval;
319 np->rxopt.bits.rxpmtu = valbool;
320 retv = 0;
321 break;
322
323 case IPV6_HOPOPTS:
324 case IPV6_RTHDRDSTOPTS:
325 case IPV6_RTHDR:
326 case IPV6_DSTOPTS:
327 {
328 struct ipv6_txoptions *opt;
329
330 /* remove any sticky options header with a zero option
331 * length, per RFC3542.
332 */
333 if (optlen == 0)
334 optval = NULL;
335 else if (optval == NULL)
336 goto e_inval;
337 else if (optlen < sizeof(struct ipv6_opt_hdr) ||
338 optlen & 0x7 || optlen > 8 * 255)
339 goto e_inval;
340
341 /* hop-by-hop / destination options are privileged option */
342 retv = -EPERM;
343 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
344 break;
345
346 opt = ipv6_renew_options(sk, np->opt, optname,
347 (struct ipv6_opt_hdr __user *)optval,
348 optlen);
349 if (IS_ERR(opt)) {
350 retv = PTR_ERR(opt);
351 break;
352 }
353
354 /* routing header option needs extra check */
355 retv = -EINVAL;
356 if (optname == IPV6_RTHDR && opt && opt->srcrt) {
357 struct ipv6_rt_hdr *rthdr = opt->srcrt;
358 switch (rthdr->type) {
359 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
360 case IPV6_SRCRT_TYPE_2:
361 if (rthdr->hdrlen != 2 ||
362 rthdr->segments_left != 1)
363 goto sticky_done;
364
365 break;
366 #endif
367 default:
368 goto sticky_done;
369 }
370 }
371
372 retv = 0;
373 opt = ipv6_update_options(sk, opt);
374 sticky_done:
375 if (opt)
376 sock_kfree_s(sk, opt, opt->tot_len);
377 break;
378 }
379
380 case IPV6_PKTINFO:
381 {
382 struct in6_pktinfo pkt;
383
384 if (optlen == 0)
385 goto e_inval;
386 else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL)
387 goto e_inval;
388
389 if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) {
390 retv = -EFAULT;
391 break;
392 }
393 if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if)
394 goto e_inval;
395
396 np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex;
397 ipv6_addr_copy(&np->sticky_pktinfo.ipi6_addr, &pkt.ipi6_addr);
398 retv = 0;
399 break;
400 }
401
402 case IPV6_2292PKTOPTIONS:
403 {
404 struct ipv6_txoptions *opt = NULL;
405 struct msghdr msg;
406 struct flowi fl;
407 int junk;
408
409 fl.fl6_flowlabel = 0;
410 fl.oif = sk->sk_bound_dev_if;
411 fl.mark = sk->sk_mark;
412
413 if (optlen == 0)
414 goto update;
415
416 /* 1K is probably excessive
417 * 1K is surely not enough, 2K per standard header is 16K.
418 */
419 retv = -EINVAL;
420 if (optlen > 64*1024)
421 break;
422
423 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
424 retv = -ENOBUFS;
425 if (opt == NULL)
426 break;
427
428 memset(opt, 0, sizeof(*opt));
429 opt->tot_len = sizeof(*opt) + optlen;
430 retv = -EFAULT;
431 if (copy_from_user(opt+1, optval, optlen))
432 goto done;
433
434 msg.msg_controllen = optlen;
435 msg.msg_control = (void*)(opt+1);
436
437 retv = datagram_send_ctl(net, &msg, &fl, opt, &junk, &junk,
438 &junk);
439 if (retv)
440 goto done;
441 update:
442 retv = 0;
443 opt = ipv6_update_options(sk, opt);
444 done:
445 if (opt)
446 sock_kfree_s(sk, opt, opt->tot_len);
447 break;
448 }
449 case IPV6_UNICAST_HOPS:
450 if (optlen < sizeof(int))
451 goto e_inval;
452 if (val > 255 || val < -1)
453 goto e_inval;
454 np->hop_limit = val;
455 retv = 0;
456 break;
457
458 case IPV6_MULTICAST_HOPS:
459 if (sk->sk_type == SOCK_STREAM)
460 break;
461 if (optlen < sizeof(int))
462 goto e_inval;
463 if (val > 255 || val < -1)
464 goto e_inval;
465 np->mcast_hops = val;
466 retv = 0;
467 break;
468
469 case IPV6_MULTICAST_LOOP:
470 if (optlen < sizeof(int))
471 goto e_inval;
472 if (val != valbool)
473 goto e_inval;
474 np->mc_loop = valbool;
475 retv = 0;
476 break;
477
478 case IPV6_MULTICAST_IF:
479 if (sk->sk_type == SOCK_STREAM)
480 break;
481 if (optlen < sizeof(int))
482 goto e_inval;
483
484 if (val) {
485 struct net_device *dev;
486
487 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
488 goto e_inval;
489
490 dev = dev_get_by_index(net, val);
491 if (!dev) {
492 retv = -ENODEV;
493 break;
494 }
495 dev_put(dev);
496 }
497 np->mcast_oif = val;
498 retv = 0;
499 break;
500 case IPV6_ADD_MEMBERSHIP:
501 case IPV6_DROP_MEMBERSHIP:
502 {
503 struct ipv6_mreq mreq;
504
505 if (optlen < sizeof(struct ipv6_mreq))
506 goto e_inval;
507
508 retv = -EPROTO;
509 if (inet_sk(sk)->is_icsk)
510 break;
511
512 retv = -EFAULT;
513 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
514 break;
515
516 if (optname == IPV6_ADD_MEMBERSHIP)
517 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
518 else
519 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
520 break;
521 }
522 case IPV6_JOIN_ANYCAST:
523 case IPV6_LEAVE_ANYCAST:
524 {
525 struct ipv6_mreq mreq;
526
527 if (optlen < sizeof(struct ipv6_mreq))
528 goto e_inval;
529
530 retv = -EFAULT;
531 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
532 break;
533
534 if (optname == IPV6_JOIN_ANYCAST)
535 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
536 else
537 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
538 break;
539 }
540 case MCAST_JOIN_GROUP:
541 case MCAST_LEAVE_GROUP:
542 {
543 struct group_req greq;
544 struct sockaddr_in6 *psin6;
545
546 if (optlen < sizeof(struct group_req))
547 goto e_inval;
548
549 retv = -EFAULT;
550 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
551 break;
552 if (greq.gr_group.ss_family != AF_INET6) {
553 retv = -EADDRNOTAVAIL;
554 break;
555 }
556 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
557 if (optname == MCAST_JOIN_GROUP)
558 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
559 &psin6->sin6_addr);
560 else
561 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
562 &psin6->sin6_addr);
563 break;
564 }
565 case MCAST_JOIN_SOURCE_GROUP:
566 case MCAST_LEAVE_SOURCE_GROUP:
567 case MCAST_BLOCK_SOURCE:
568 case MCAST_UNBLOCK_SOURCE:
569 {
570 struct group_source_req greqs;
571 int omode, add;
572
573 if (optlen < sizeof(struct group_source_req))
574 goto e_inval;
575 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
576 retv = -EFAULT;
577 break;
578 }
579 if (greqs.gsr_group.ss_family != AF_INET6 ||
580 greqs.gsr_source.ss_family != AF_INET6) {
581 retv = -EADDRNOTAVAIL;
582 break;
583 }
584 if (optname == MCAST_BLOCK_SOURCE) {
585 omode = MCAST_EXCLUDE;
586 add = 1;
587 } else if (optname == MCAST_UNBLOCK_SOURCE) {
588 omode = MCAST_EXCLUDE;
589 add = 0;
590 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
591 struct sockaddr_in6 *psin6;
592
593 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
594 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
595 &psin6->sin6_addr);
596 /* prior join w/ different source is ok */
597 if (retv && retv != -EADDRINUSE)
598 break;
599 omode = MCAST_INCLUDE;
600 add = 1;
601 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
602 omode = MCAST_INCLUDE;
603 add = 0;
604 }
605 retv = ip6_mc_source(add, omode, sk, &greqs);
606 break;
607 }
608 case MCAST_MSFILTER:
609 {
610 extern int sysctl_mld_max_msf;
611 struct group_filter *gsf;
612
613 if (optlen < GROUP_FILTER_SIZE(0))
614 goto e_inval;
615 if (optlen > sysctl_optmem_max) {
616 retv = -ENOBUFS;
617 break;
618 }
619 gsf = kmalloc(optlen,GFP_KERNEL);
620 if (!gsf) {
621 retv = -ENOBUFS;
622 break;
623 }
624 retv = -EFAULT;
625 if (copy_from_user(gsf, optval, optlen)) {
626 kfree(gsf);
627 break;
628 }
629 /* numsrc >= (4G-140)/128 overflow in 32 bits */
630 if (gsf->gf_numsrc >= 0x1ffffffU ||
631 gsf->gf_numsrc > sysctl_mld_max_msf) {
632 kfree(gsf);
633 retv = -ENOBUFS;
634 break;
635 }
636 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
637 kfree(gsf);
638 retv = -EINVAL;
639 break;
640 }
641 retv = ip6_mc_msfilter(sk, gsf);
642 kfree(gsf);
643
644 break;
645 }
646 case IPV6_ROUTER_ALERT:
647 if (optlen < sizeof(int))
648 goto e_inval;
649 retv = ip6_ra_control(sk, val);
650 break;
651 case IPV6_MTU_DISCOVER:
652 if (optlen < sizeof(int))
653 goto e_inval;
654 if (val < IP_PMTUDISC_DONT || val > IP_PMTUDISC_PROBE)
655 goto e_inval;
656 np->pmtudisc = val;
657 retv = 0;
658 break;
659 case IPV6_MTU:
660 if (optlen < sizeof(int))
661 goto e_inval;
662 if (val && val < IPV6_MIN_MTU)
663 goto e_inval;
664 np->frag_size = val;
665 retv = 0;
666 break;
667 case IPV6_RECVERR:
668 if (optlen < sizeof(int))
669 goto e_inval;
670 np->recverr = valbool;
671 if (!val)
672 skb_queue_purge(&sk->sk_error_queue);
673 retv = 0;
674 break;
675 case IPV6_FLOWINFO_SEND:
676 if (optlen < sizeof(int))
677 goto e_inval;
678 np->sndflow = valbool;
679 retv = 0;
680 break;
681 case IPV6_FLOWLABEL_MGR:
682 retv = ipv6_flowlabel_opt(sk, optval, optlen);
683 break;
684 case IPV6_IPSEC_POLICY:
685 case IPV6_XFRM_POLICY:
686 retv = -EPERM;
687 if (!capable(CAP_NET_ADMIN))
688 break;
689 retv = xfrm_user_policy(sk, optname, optval, optlen);
690 break;
691
692 case IPV6_ADDR_PREFERENCES:
693 {
694 unsigned int pref = 0;
695 unsigned int prefmask = ~0;
696
697 if (optlen < sizeof(int))
698 goto e_inval;
699
700 retv = -EINVAL;
701
702 /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */
703 switch (val & (IPV6_PREFER_SRC_PUBLIC|
704 IPV6_PREFER_SRC_TMP|
705 IPV6_PREFER_SRC_PUBTMP_DEFAULT)) {
706 case IPV6_PREFER_SRC_PUBLIC:
707 pref |= IPV6_PREFER_SRC_PUBLIC;
708 break;
709 case IPV6_PREFER_SRC_TMP:
710 pref |= IPV6_PREFER_SRC_TMP;
711 break;
712 case IPV6_PREFER_SRC_PUBTMP_DEFAULT:
713 break;
714 case 0:
715 goto pref_skip_pubtmp;
716 default:
717 goto e_inval;
718 }
719
720 prefmask &= ~(IPV6_PREFER_SRC_PUBLIC|
721 IPV6_PREFER_SRC_TMP);
722 pref_skip_pubtmp:
723
724 /* check HOME/COA conflicts */
725 switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) {
726 case IPV6_PREFER_SRC_HOME:
727 break;
728 case IPV6_PREFER_SRC_COA:
729 pref |= IPV6_PREFER_SRC_COA;
730 case 0:
731 goto pref_skip_coa;
732 default:
733 goto e_inval;
734 }
735
736 prefmask &= ~IPV6_PREFER_SRC_COA;
737 pref_skip_coa:
738
739 /* check CGA/NONCGA conflicts */
740 switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) {
741 case IPV6_PREFER_SRC_CGA:
742 case IPV6_PREFER_SRC_NONCGA:
743 case 0:
744 break;
745 default:
746 goto e_inval;
747 }
748
749 np->srcprefs = (np->srcprefs & prefmask) | pref;
750 retv = 0;
751
752 break;
753 }
754 case IPV6_MINHOPCOUNT:
755 if (optlen < sizeof(int))
756 goto e_inval;
757 if (val < 0 || val > 255)
758 goto e_inval;
759 np->min_hopcount = val;
760 break;
761 case IPV6_DONTFRAG:
762 np->dontfrag = valbool;
763 retv = 0;
764 break;
765 }
766
767 release_sock(sk);
768
769 return retv;
770
771 e_inval:
772 release_sock(sk);
773 return -EINVAL;
774 }
775
776 int ipv6_setsockopt(struct sock *sk, int level, int optname,
777 char __user *optval, unsigned int optlen)
778 {
779 int err;
780
781 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
782 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
783
784 if (level != SOL_IPV6)
785 return -ENOPROTOOPT;
786
787 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
788 #ifdef CONFIG_NETFILTER
789 /* we need to exclude all possible ENOPROTOOPTs except default case */
790 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
791 optname != IPV6_XFRM_POLICY) {
792 lock_sock(sk);
793 err = nf_setsockopt(sk, PF_INET6, optname, optval,
794 optlen);
795 release_sock(sk);
796 }
797 #endif
798 return err;
799 }
800
801 EXPORT_SYMBOL(ipv6_setsockopt);
802
803 #ifdef CONFIG_COMPAT
804 int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
805 char __user *optval, unsigned int optlen)
806 {
807 int err;
808
809 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
810 if (udp_prot.compat_setsockopt != NULL)
811 return udp_prot.compat_setsockopt(sk, level, optname,
812 optval, optlen);
813 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
814 }
815
816 if (level != SOL_IPV6)
817 return -ENOPROTOOPT;
818
819 if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER)
820 return compat_mc_setsockopt(sk, level, optname, optval, optlen,
821 ipv6_setsockopt);
822
823 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
824 #ifdef CONFIG_NETFILTER
825 /* we need to exclude all possible ENOPROTOOPTs except default case */
826 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
827 optname != IPV6_XFRM_POLICY) {
828 lock_sock(sk);
829 err = compat_nf_setsockopt(sk, PF_INET6, optname,
830 optval, optlen);
831 release_sock(sk);
832 }
833 #endif
834 return err;
835 }
836
837 EXPORT_SYMBOL(compat_ipv6_setsockopt);
838 #endif
839
840 static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
841 int optname, char __user *optval, int len)
842 {
843 struct ipv6_opt_hdr *hdr;
844
845 if (!opt)
846 return 0;
847
848 switch(optname) {
849 case IPV6_HOPOPTS:
850 hdr = opt->hopopt;
851 break;
852 case IPV6_RTHDRDSTOPTS:
853 hdr = opt->dst0opt;
854 break;
855 case IPV6_RTHDR:
856 hdr = (struct ipv6_opt_hdr *)opt->srcrt;
857 break;
858 case IPV6_DSTOPTS:
859 hdr = opt->dst1opt;
860 break;
861 default:
862 return -EINVAL; /* should not happen */
863 }
864
865 if (!hdr)
866 return 0;
867
868 len = min_t(unsigned int, len, ipv6_optlen(hdr));
869 if (copy_to_user(optval, hdr, len))
870 return -EFAULT;
871 return len;
872 }
873
874 static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
875 char __user *optval, int __user *optlen)
876 {
877 struct ipv6_pinfo *np = inet6_sk(sk);
878 int len;
879 int val;
880
881 if (ip6_mroute_opt(optname))
882 return ip6_mroute_getsockopt(sk, optname, optval, optlen);
883
884 if (get_user(len, optlen))
885 return -EFAULT;
886 switch (optname) {
887 case IPV6_ADDRFORM:
888 if (sk->sk_protocol != IPPROTO_UDP &&
889 sk->sk_protocol != IPPROTO_UDPLITE &&
890 sk->sk_protocol != IPPROTO_TCP)
891 return -ENOPROTOOPT;
892 if (sk->sk_state != TCP_ESTABLISHED)
893 return -ENOTCONN;
894 val = sk->sk_family;
895 break;
896 case MCAST_MSFILTER:
897 {
898 struct group_filter gsf;
899 int err;
900
901 if (len < GROUP_FILTER_SIZE(0))
902 return -EINVAL;
903 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
904 return -EFAULT;
905 if (gsf.gf_group.ss_family != AF_INET6)
906 return -EADDRNOTAVAIL;
907 lock_sock(sk);
908 err = ip6_mc_msfget(sk, &gsf,
909 (struct group_filter __user *)optval, optlen);
910 release_sock(sk);
911 return err;
912 }
913
914 case IPV6_2292PKTOPTIONS:
915 {
916 struct msghdr msg;
917 struct sk_buff *skb;
918
919 if (sk->sk_type != SOCK_STREAM)
920 return -ENOPROTOOPT;
921
922 msg.msg_control = optval;
923 msg.msg_controllen = len;
924 msg.msg_flags = 0;
925
926 lock_sock(sk);
927 skb = np->pktoptions;
928 if (skb)
929 atomic_inc(&skb->users);
930 release_sock(sk);
931
932 if (skb) {
933 int err = datagram_recv_ctl(sk, &msg, skb);
934 kfree_skb(skb);
935 if (err)
936 return err;
937 } else {
938 if (np->rxopt.bits.rxinfo) {
939 struct in6_pktinfo src_info;
940 src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif :
941 np->sticky_pktinfo.ipi6_ifindex;
942 np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) :
943 ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr));
944 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
945 }
946 if (np->rxopt.bits.rxhlim) {
947 int hlim = np->mcast_hops;
948 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
949 }
950 if (np->rxopt.bits.rxoinfo) {
951 struct in6_pktinfo src_info;
952 src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif :
953 np->sticky_pktinfo.ipi6_ifindex;
954 np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) :
955 ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr));
956 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
957 }
958 if (np->rxopt.bits.rxohlim) {
959 int hlim = np->mcast_hops;
960 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
961 }
962 }
963 len -= msg.msg_controllen;
964 return put_user(len, optlen);
965 }
966 case IPV6_MTU:
967 {
968 struct dst_entry *dst;
969
970 val = 0;
971 rcu_read_lock();
972 dst = __sk_dst_get(sk);
973 if (dst)
974 val = dst_mtu(dst);
975 rcu_read_unlock();
976 if (!val)
977 return -ENOTCONN;
978 break;
979 }
980
981 case IPV6_V6ONLY:
982 val = np->ipv6only;
983 break;
984
985 case IPV6_RECVPKTINFO:
986 val = np->rxopt.bits.rxinfo;
987 break;
988
989 case IPV6_2292PKTINFO:
990 val = np->rxopt.bits.rxoinfo;
991 break;
992
993 case IPV6_RECVHOPLIMIT:
994 val = np->rxopt.bits.rxhlim;
995 break;
996
997 case IPV6_2292HOPLIMIT:
998 val = np->rxopt.bits.rxohlim;
999 break;
1000
1001 case IPV6_RECVRTHDR:
1002 val = np->rxopt.bits.srcrt;
1003 break;
1004
1005 case IPV6_2292RTHDR:
1006 val = np->rxopt.bits.osrcrt;
1007 break;
1008
1009 case IPV6_HOPOPTS:
1010 case IPV6_RTHDRDSTOPTS:
1011 case IPV6_RTHDR:
1012 case IPV6_DSTOPTS:
1013 {
1014
1015 lock_sock(sk);
1016 len = ipv6_getsockopt_sticky(sk, np->opt,
1017 optname, optval, len);
1018 release_sock(sk);
1019 /* check if ipv6_getsockopt_sticky() returns err code */
1020 if (len < 0)
1021 return len;
1022 return put_user(len, optlen);
1023 }
1024
1025 case IPV6_RECVHOPOPTS:
1026 val = np->rxopt.bits.hopopts;
1027 break;
1028
1029 case IPV6_2292HOPOPTS:
1030 val = np->rxopt.bits.ohopopts;
1031 break;
1032
1033 case IPV6_RECVDSTOPTS:
1034 val = np->rxopt.bits.dstopts;
1035 break;
1036
1037 case IPV6_2292DSTOPTS:
1038 val = np->rxopt.bits.odstopts;
1039 break;
1040
1041 case IPV6_TCLASS:
1042 val = np->tclass;
1043 break;
1044
1045 case IPV6_RECVTCLASS:
1046 val = np->rxopt.bits.rxtclass;
1047 break;
1048
1049 case IPV6_FLOWINFO:
1050 val = np->rxopt.bits.rxflow;
1051 break;
1052
1053 case IPV6_RECVPATHMTU:
1054 val = np->rxopt.bits.rxpmtu;
1055 break;
1056
1057 case IPV6_PATHMTU:
1058 {
1059 struct dst_entry *dst;
1060 struct ip6_mtuinfo mtuinfo;
1061
1062 if (len < sizeof(mtuinfo))
1063 return -EINVAL;
1064
1065 len = sizeof(mtuinfo);
1066 memset(&mtuinfo, 0, sizeof(mtuinfo));
1067
1068 rcu_read_lock();
1069 dst = __sk_dst_get(sk);
1070 if (dst)
1071 mtuinfo.ip6m_mtu = dst_mtu(dst);
1072 rcu_read_unlock();
1073 if (!mtuinfo.ip6m_mtu)
1074 return -ENOTCONN;
1075
1076 if (put_user(len, optlen))
1077 return -EFAULT;
1078 if (copy_to_user(optval, &mtuinfo, len))
1079 return -EFAULT;
1080
1081 return 0;
1082 break;
1083 }
1084
1085 case IPV6_UNICAST_HOPS:
1086 case IPV6_MULTICAST_HOPS:
1087 {
1088 struct dst_entry *dst;
1089
1090 if (optname == IPV6_UNICAST_HOPS)
1091 val = np->hop_limit;
1092 else
1093 val = np->mcast_hops;
1094
1095 if (val < 0) {
1096 rcu_read_lock();
1097 dst = __sk_dst_get(sk);
1098 if (dst)
1099 val = ip6_dst_hoplimit(dst);
1100 rcu_read_unlock();
1101 }
1102
1103 if (val < 0)
1104 val = sock_net(sk)->ipv6.devconf_all->hop_limit;
1105 break;
1106 }
1107
1108 case IPV6_MULTICAST_LOOP:
1109 val = np->mc_loop;
1110 break;
1111
1112 case IPV6_MULTICAST_IF:
1113 val = np->mcast_oif;
1114 break;
1115
1116 case IPV6_MTU_DISCOVER:
1117 val = np->pmtudisc;
1118 break;
1119
1120 case IPV6_RECVERR:
1121 val = np->recverr;
1122 break;
1123
1124 case IPV6_FLOWINFO_SEND:
1125 val = np->sndflow;
1126 break;
1127
1128 case IPV6_ADDR_PREFERENCES:
1129 val = 0;
1130
1131 if (np->srcprefs & IPV6_PREFER_SRC_TMP)
1132 val |= IPV6_PREFER_SRC_TMP;
1133 else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC)
1134 val |= IPV6_PREFER_SRC_PUBLIC;
1135 else {
1136 val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT;
1137 }
1138
1139 if (np->srcprefs & IPV6_PREFER_SRC_COA)
1140 val |= IPV6_PREFER_SRC_COA;
1141 else
1142 val |= IPV6_PREFER_SRC_HOME;
1143 break;
1144
1145 case IPV6_MINHOPCOUNT:
1146 val = np->min_hopcount;
1147 break;
1148
1149 case IPV6_DONTFRAG:
1150 val = np->dontfrag;
1151 break;
1152
1153 default:
1154 return -ENOPROTOOPT;
1155 }
1156 len = min_t(unsigned int, sizeof(int), len);
1157 if(put_user(len, optlen))
1158 return -EFAULT;
1159 if(copy_to_user(optval,&val,len))
1160 return -EFAULT;
1161 return 0;
1162 }
1163
1164 int ipv6_getsockopt(struct sock *sk, int level, int optname,
1165 char __user *optval, int __user *optlen)
1166 {
1167 int err;
1168
1169 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
1170 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1171
1172 if(level != SOL_IPV6)
1173 return -ENOPROTOOPT;
1174
1175 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1176 #ifdef CONFIG_NETFILTER
1177 /* we need to exclude all possible ENOPROTOOPTs except default case */
1178 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
1179 int len;
1180
1181 if (get_user(len, optlen))
1182 return -EFAULT;
1183
1184 lock_sock(sk);
1185 err = nf_getsockopt(sk, PF_INET6, optname, optval,
1186 &len);
1187 release_sock(sk);
1188 if (err >= 0)
1189 err = put_user(len, optlen);
1190 }
1191 #endif
1192 return err;
1193 }
1194
1195 EXPORT_SYMBOL(ipv6_getsockopt);
1196
1197 #ifdef CONFIG_COMPAT
1198 int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
1199 char __user *optval, int __user *optlen)
1200 {
1201 int err;
1202
1203 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
1204 if (udp_prot.compat_getsockopt != NULL)
1205 return udp_prot.compat_getsockopt(sk, level, optname,
1206 optval, optlen);
1207 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1208 }
1209
1210 if (level != SOL_IPV6)
1211 return -ENOPROTOOPT;
1212
1213 if (optname == MCAST_MSFILTER)
1214 return compat_mc_getsockopt(sk, level, optname, optval, optlen,
1215 ipv6_getsockopt);
1216
1217 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1218 #ifdef CONFIG_NETFILTER
1219 /* we need to exclude all possible ENOPROTOOPTs except default case */
1220 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
1221 int len;
1222
1223 if (get_user(len, optlen))
1224 return -EFAULT;
1225
1226 lock_sock(sk);
1227 err = compat_nf_getsockopt(sk, PF_INET6,
1228 optname, optval, &len);
1229 release_sock(sk);
1230 if (err >= 0)
1231 err = put_user(len, optlen);
1232 }
1233 #endif
1234 return err;
1235 }
1236
1237 EXPORT_SYMBOL(compat_ipv6_getsockopt);
1238 #endif
Tomato firmware and modifications.