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[NET] gso: Add skb_is_gso
[mirror_ubuntu-artful-kernel.git] / net / ipv6 / ipv6_sockglue.c
CommitLineData
1da177e4
LT		 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>
4fc268d2 29#include <linux/capability.h>
1da177e4
LT		 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
ba89966c 58DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly;
1da177e4 59
adcfc7d0
HX		 60static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features)
61{
62 struct sk_buff *segs = ERR_PTR(-EINVAL);
63 struct ipv6hdr *ipv6h;
64 struct inet6_protocol *ops;
65 int proto;
66
bbcf467d
HX		 67 if (unlikely(skb_shinfo(skb)->gso_type &
68 ~(SKB_GSO_UDP |
69 SKB_GSO_DODGY |
70 SKB_GSO_TCP_ECN |
71 SKB_GSO_TCPV6 |
72 0)))
73 goto out;
74
adcfc7d0
HX		 75 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
76 goto out;
77
78 ipv6h = skb->nh.ipv6h;
79 proto = ipv6h->nexthdr;
80 __skb_pull(skb, sizeof(*ipv6h));
81
82 rcu_read_lock();
83 for (;;) {
84 struct ipv6_opt_hdr *opth;
85 int len;
86
87 if (proto != NEXTHDR_HOP) {
88 ops = rcu_dereference(inet6_protos[proto]);
89
90 if (unlikely(!ops))
91 goto unlock;
92
93 if (!(ops->flags & INET6_PROTO_GSO_EXTHDR))
94 break;
95 }
96
97 if (unlikely(!pskb_may_pull(skb, 8)))
98 goto unlock;
99
100 opth = (void *)skb->data;
101 len = opth->hdrlen * 8 + 8;
102
103 if (unlikely(!pskb_may_pull(skb, len)))
104 goto unlock;
105
106 proto = opth->nexthdr;
107 __skb_pull(skb, len);
108 }
109
110 skb->h.raw = skb->data;
111 if (likely(ops->gso_segment))
112 segs = ops->gso_segment(skb, features);
113
114unlock:
115 rcu_read_unlock();
116
117 if (unlikely(IS_ERR(segs)))
118 goto out;
119
120 for (skb = segs; skb; skb = skb->next) {
121 ipv6h = skb->nh.ipv6h;
6703931c
MC		 122 ipv6h->payload_len = htons(skb->len - skb->mac_len -
123 sizeof(*ipv6h));
adcfc7d0
HX		 124 }
125
126out:
127 return segs;
128}
129
1da177e4
LT		 130static struct packet_type ipv6_packet_type = {
131 .type = __constant_htons(ETH_P_IPV6),
132 .func = ipv6_rcv,
adcfc7d0 133 .gso_segment = ipv6_gso_segment,
1da177e4
LT		 134};
135
136struct ip6_ra_chain *ip6_ra_chain;
137DEFINE_RWLOCK(ip6_ra_lock);
138
139int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *))
140{
141 struct ip6_ra_chain *ra, *new_ra, **rap;
142
143 /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
144 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW)
145 return -EINVAL;
146
147 new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
148
149 write_lock_bh(&ip6_ra_lock);
150 for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
151 if (ra->sk == sk) {
152 if (sel>=0) {
153 write_unlock_bh(&ip6_ra_lock);
a51482bd 154 kfree(new_ra);
1da177e4
LT		 155 return -EADDRINUSE;
156 }
157
158 *rap = ra->next;
159 write_unlock_bh(&ip6_ra_lock);
160
161 if (ra->destructor)
162 ra->destructor(sk);
163 sock_put(sk);
164 kfree(ra);
165 return 0;
166 }
167 }
168 if (new_ra == NULL) {
169 write_unlock_bh(&ip6_ra_lock);
170 return -ENOBUFS;
171 }
172 new_ra->sk = sk;
173 new_ra->sel = sel;
174 new_ra->destructor = destructor;
175 new_ra->next = ra;
176 *rap = new_ra;
177 sock_hold(sk);
178 write_unlock_bh(&ip6_ra_lock);
179 return 0;
180}
181
3fdadf7d 182static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
1da177e4
LT		 183 char __user *optval, int optlen)
184{
185 struct ipv6_pinfo *np = inet6_sk(sk);
186 int val, valbool;
187 int retv = -ENOPROTOOPT;
188
1da177e4
LT		 189 if (optval == NULL)
190 val=0;
191 else if (get_user(val, (int __user *) optval))
192 return -EFAULT;
193
194 valbool = (val!=0);
195
196 lock_sock(sk);
197
198 switch (optname) {
199
200 case IPV6_ADDRFORM:
201 if (val == PF_INET) {
202 struct ipv6_txoptions *opt;
203 struct sk_buff *pktopt;
204
205 if (sk->sk_protocol != IPPROTO_UDP &&
206 sk->sk_protocol != IPPROTO_TCP)
207 break;
208
209 if (sk->sk_state != TCP_ESTABLISHED) {
210 retv = -ENOTCONN;
211 break;
212 }
213
214 if (ipv6_only_sock(sk) ||
215 !(ipv6_addr_type(&np->daddr) & IPV6_ADDR_MAPPED)) {
216 retv = -EADDRNOTAVAIL;
217 break;
218 }
219
220 fl6_free_socklist(sk);
221 ipv6_sock_mc_close(sk);
222
e6848976
ACM		 223 /*
224 * Sock is moving from IPv6 to IPv4 (sk_prot), so
225 * remove it from the refcnt debug socks count in the
226 * original family...
227 */
228 sk_refcnt_debug_dec(sk);
229
1da177e4 230 if (sk->sk_protocol == IPPROTO_TCP) {
d83d8461 231 struct inet_connection_sock *icsk = inet_csk(sk);
1da177e4
LT		 232
233 local_bh_disable();
234 sock_prot_dec_use(sk->sk_prot);
235 sock_prot_inc_use(&tcp_prot);
236 local_bh_enable();
237 sk->sk_prot = &tcp_prot;
d83d8461 238 icsk->icsk_af_ops = &ipv4_specific;
1da177e4
LT		 239 sk->sk_socket->ops = &inet_stream_ops;
240 sk->sk_family = PF_INET;
d83d8461 241 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
1da177e4
LT		 242 } else {
243 local_bh_disable();
244 sock_prot_dec_use(sk->sk_prot);
245 sock_prot_inc_use(&udp_prot);
246 local_bh_enable();
247 sk->sk_prot = &udp_prot;
248 sk->sk_socket->ops = &inet_dgram_ops;
249 sk->sk_family = PF_INET;
250 }
251 opt = xchg(&np->opt, NULL);
252 if (opt)
253 sock_kfree_s(sk, opt, opt->tot_len);
254 pktopt = xchg(&np->pktoptions, NULL);
255 if (pktopt)
256 kfree_skb(pktopt);
257
258 sk->sk_destruct = inet_sock_destruct;
e6848976
ACM		 259 /*
260 * ... and add it to the refcnt debug socks count
261 * in the new family. -acme
262 */
263 sk_refcnt_debug_inc(sk);
1da177e4
LT		 264 module_put(THIS_MODULE);
265 retv = 0;
266 break;
267 }
268 goto e_inval;
269
270 case IPV6_V6ONLY:
271 if (inet_sk(sk)->num)
272 goto e_inval;
273 np->ipv6only = valbool;
274 retv = 0;
275 break;
276
333fad53 277 case IPV6_RECVPKTINFO:
1da177e4
LT		 278 np->rxopt.bits.rxinfo = valbool;
279 retv = 0;
280 break;
333fad53
YH		 281
282 case IPV6_2292PKTINFO:
283 np->rxopt.bits.rxoinfo = valbool;
284 retv = 0;
285 break;
1da177e4 286
333fad53 287 case IPV6_RECVHOPLIMIT:
1da177e4
LT		 288 np->rxopt.bits.rxhlim = valbool;
289 retv = 0;
290 break;
291
333fad53
YH		 292 case IPV6_2292HOPLIMIT:
293 np->rxopt.bits.rxohlim = valbool;
294 retv = 0;
295 break;
296
297 case IPV6_RECVRTHDR:
1da177e4
LT		 298 if (val < 0 || val > 2)
299 goto e_inval;
300 np->rxopt.bits.srcrt = val;
301 retv = 0;
302 break;
303
333fad53
YH		 304 case IPV6_2292RTHDR:
305 if (val < 0 || val > 2)
306 goto e_inval;
307 np->rxopt.bits.osrcrt = val;
308 retv = 0;
309 break;
310
311 case IPV6_RECVHOPOPTS:
1da177e4
LT		 312 np->rxopt.bits.hopopts = valbool;
313 retv = 0;
314 break;
315
333fad53
YH		 316 case IPV6_2292HOPOPTS:
317 np->rxopt.bits.ohopopts = valbool;
318 retv = 0;
319 break;
320
321 case IPV6_RECVDSTOPTS:
1da177e4
LT		 322 np->rxopt.bits.dstopts = valbool;
323 retv = 0;
324 break;
325
333fad53
YH		 326 case IPV6_2292DSTOPTS:
327 np->rxopt.bits.odstopts = valbool;
328 retv = 0;
329 break;
330
41a1f8ea
YH		 331 case IPV6_TCLASS:
332 if (val < 0 || val > 0xff)
333 goto e_inval;
334 np->tclass = val;
335 retv = 0;
336 break;
337
338 case IPV6_RECVTCLASS:
339 np->rxopt.bits.rxtclass = valbool;
340 retv = 0;
341 break;
342
1da177e4
LT		 343 case IPV6_FLOWINFO:
344 np->rxopt.bits.rxflow = valbool;
345 retv = 0;
346 break;
347
333fad53
YH		 348 case IPV6_HOPOPTS:
349 case IPV6_RTHDRDSTOPTS:
350 case IPV6_RTHDR:
351 case IPV6_DSTOPTS:
352 {
353 struct ipv6_txoptions *opt;
354 if (optlen == 0)
cb422c46 355 optval = NULL;
333fad53
YH		 356
357 /* hop-by-hop / destination options are privileged option */
358 retv = -EPERM;
359 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
360 break;
361
362 retv = -EINVAL;
363 if (optlen & 0x7 || optlen > 8 * 255)
364 break;
365
366 opt = ipv6_renew_options(sk, np->opt, optname,
367 (struct ipv6_opt_hdr __user *)optval,
368 optlen);
369 if (IS_ERR(opt)) {
370 retv = PTR_ERR(opt);
371 break;
372 }
373
374 /* routing header option needs extra check */
375 if (optname == IPV6_RTHDR && opt->srcrt) {
376 struct ipv6_rt_hdr *rthdr = opt->srcrt;
377 if (rthdr->type)
378 goto sticky_done;
379 if ((rthdr->hdrlen & 1) ||
380 (rthdr->hdrlen >> 1) != rthdr->segments_left)
381 goto sticky_done;
382 }
383
384 retv = 0;
d83d8461 385 if (inet_sk(sk)->is_icsk) {
333fad53 386 if (opt) {
d83d8461 387 struct inet_connection_sock *icsk = inet_csk(sk);
333fad53
YH		 388 if (!((1 << sk->sk_state) &
389 (TCPF_LISTEN | TCPF_CLOSE))
390 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
d83d8461
ACM		 391 icsk->icsk_ext_hdr_len =
392 opt->opt_flen + opt->opt_nflen;
393 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
333fad53
YH		 394 }
395 }
396 opt = xchg(&np->opt, opt);
397 sk_dst_reset(sk);
398 } else {
399 write_lock(&sk->sk_dst_lock);
400 opt = xchg(&np->opt, opt);
401 write_unlock(&sk->sk_dst_lock);
402 sk_dst_reset(sk);
403 }
404sticky_done:
405 if (opt)
406 sock_kfree_s(sk, opt, opt->tot_len);
407 break;
408 }
409
410 case IPV6_2292PKTOPTIONS:
1da177e4
LT		 411 {
412 struct ipv6_txoptions *opt = NULL;
413 struct msghdr msg;
414 struct flowi fl;
415 int junk;
416
417 fl.fl6_flowlabel = 0;
418 fl.oif = sk->sk_bound_dev_if;
419
420 if (optlen == 0)
421 goto update;
422
423 /* 1K is probably excessive
424 * 1K is surely not enough, 2K per standard header is 16K.
425 */
426 retv = -EINVAL;
427 if (optlen > 64*1024)
428 break;
429
430 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
431 retv = -ENOBUFS;
432 if (opt == NULL)
433 break;
434
435 memset(opt, 0, sizeof(*opt));
436 opt->tot_len = sizeof(*opt) + optlen;
437 retv = -EFAULT;
438 if (copy_from_user(opt+1, optval, optlen))
439 goto done;
440
441 msg.msg_controllen = optlen;
442 msg.msg_control = (void*)(opt+1);
443
41a1f8ea 444 retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk);
1da177e4
LT		 445 if (retv)
446 goto done;
447update:
448 retv = 0;
d83d8461 449 if (inet_sk(sk)->is_icsk) {
1da177e4 450 if (opt) {
d83d8461 451 struct inet_connection_sock *icsk = inet_csk(sk);
1da177e4
LT		 452 if (!((1 << sk->sk_state) &
453 (TCPF_LISTEN | TCPF_CLOSE))
454 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
d83d8461
ACM		 455 icsk->icsk_ext_hdr_len =
456 opt->opt_flen + opt->opt_nflen;
457 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
1da177e4
LT		 458 }
459 }
460 opt = xchg(&np->opt, opt);
461 sk_dst_reset(sk);
462 } else {
463 write_lock(&sk->sk_dst_lock);
464 opt = xchg(&np->opt, opt);
465 write_unlock(&sk->sk_dst_lock);
466 sk_dst_reset(sk);
467 }
468
469done:
470 if (opt)
471 sock_kfree_s(sk, opt, opt->tot_len);
472 break;
473 }
474 case IPV6_UNICAST_HOPS:
475 if (val > 255 || val < -1)
476 goto e_inval;
477 np->hop_limit = val;
478 retv = 0;
479 break;
480
481 case IPV6_MULTICAST_HOPS:
482 if (sk->sk_type == SOCK_STREAM)
483 goto e_inval;
484 if (val > 255 || val < -1)
485 goto e_inval;
486 np->mcast_hops = val;
487 retv = 0;
488 break;
489
490 case IPV6_MULTICAST_LOOP:
491 np->mc_loop = valbool;
492 retv = 0;
493 break;
494
495 case IPV6_MULTICAST_IF:
496 if (sk->sk_type == SOCK_STREAM)
497 goto e_inval;
498 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
499 goto e_inval;
500
501 if (__dev_get_by_index(val) == NULL) {
502 retv = -ENODEV;
503 break;
504 }
505 np->mcast_oif = val;
506 retv = 0;
507 break;
508 case IPV6_ADD_MEMBERSHIP:
509 case IPV6_DROP_MEMBERSHIP:
510 {
511 struct ipv6_mreq mreq;
512
513 retv = -EFAULT;
514 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
515 break;
516
517 if (optname == IPV6_ADD_MEMBERSHIP)
518 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
519 else
520 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
521 break;
522 }
523 case IPV6_JOIN_ANYCAST:
524 case IPV6_LEAVE_ANYCAST:
525 {
526 struct ipv6_mreq mreq;
527
528 if (optlen != sizeof(struct ipv6_mreq))
529 goto e_inval;
530
531 retv = -EFAULT;
532 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
533 break;
534
535 if (optname == IPV6_JOIN_ANYCAST)
536 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
537 else
538 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
539 break;
540 }
541 case MCAST_JOIN_GROUP:
542 case MCAST_LEAVE_GROUP:
543 {
544 struct group_req greq;
545 struct sockaddr_in6 *psin6;
546
547 retv = -EFAULT;
548 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
549 break;
550 if (greq.gr_group.ss_family != AF_INET6) {
551 retv = -EADDRNOTAVAIL;
552 break;
553 }
554 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
555 if (optname == MCAST_JOIN_GROUP)
556 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
557 &psin6->sin6_addr);
558 else
559 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
560 &psin6->sin6_addr);
561 break;
562 }
563 case MCAST_JOIN_SOURCE_GROUP:
564 case MCAST_LEAVE_SOURCE_GROUP:
565 case MCAST_BLOCK_SOURCE:
566 case MCAST_UNBLOCK_SOURCE:
567 {
568 struct group_source_req greqs;
569 int omode, add;
570
571 if (optlen != sizeof(struct group_source_req))
572 goto e_inval;
573 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
574 retv = -EFAULT;
575 break;
576 }
577 if (greqs.gsr_group.ss_family != AF_INET6 ||
578 greqs.gsr_source.ss_family != AF_INET6) {
579 retv = -EADDRNOTAVAIL;
580 break;
581 }
582 if (optname == MCAST_BLOCK_SOURCE) {
583 omode = MCAST_EXCLUDE;
584 add = 1;
585 } else if (optname == MCAST_UNBLOCK_SOURCE) {
586 omode = MCAST_EXCLUDE;
587 add = 0;
588 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
589 struct sockaddr_in6 *psin6;
590
591 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
592 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
593 &psin6->sin6_addr);
c9e3e8b6
DS		 594 /* prior join w/ different source is ok */
595 if (retv && retv != -EADDRINUSE)
1da177e4
LT		 596 break;
597 omode = MCAST_INCLUDE;
598 add = 1;
c9e3e8b6 599 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
1da177e4
LT		 600 omode = MCAST_INCLUDE;
601 add = 0;
602 }
603 retv = ip6_mc_source(add, omode, sk, &greqs);
604 break;
605 }
606 case MCAST_MSFILTER:
607 {
1da177e4
LT		 608 extern int sysctl_mld_max_msf;
609 struct group_filter *gsf;
610
611 if (optlen < GROUP_FILTER_SIZE(0))
612 goto e_inval;
613 if (optlen > sysctl_optmem_max) {
614 retv = -ENOBUFS;
615 break;
616 }
8b3a7005 617 gsf = kmalloc(optlen,GFP_KERNEL);
1da177e4
LT		 618 if (gsf == 0) {
619 retv = -ENOBUFS;
620 break;
621 }
622 retv = -EFAULT;
623 if (copy_from_user(gsf, optval, optlen)) {
624 kfree(gsf);
625 break;
626 }
627 /* numsrc >= (4G-140)/128 overflow in 32 bits */
628 if (gsf->gf_numsrc >= 0x1ffffffU ||
629 gsf->gf_numsrc > sysctl_mld_max_msf) {
630 kfree(gsf);
631 retv = -ENOBUFS;
632 break;
633 }
634 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
635 kfree(gsf);
636 retv = -EINVAL;
637 break;
638 }
639 retv = ip6_mc_msfilter(sk, gsf);
640 kfree(gsf);
641
642 break;
643 }
644 case IPV6_ROUTER_ALERT:
645 retv = ip6_ra_control(sk, val, NULL);
646 break;
647 case IPV6_MTU_DISCOVER:
648 if (val<0 || val>2)
649 goto e_inval;
650 np->pmtudisc = val;
651 retv = 0;
652 break;
653 case IPV6_MTU:
654 if (val && val < IPV6_MIN_MTU)
655 goto e_inval;
656 np->frag_size = val;
657 retv = 0;
658 break;
659 case IPV6_RECVERR:
660 np->recverr = valbool;
661 if (!val)
662 skb_queue_purge(&sk->sk_error_queue);
663 retv = 0;
664 break;
665 case IPV6_FLOWINFO_SEND:
666 np->sndflow = valbool;
667 retv = 0;
668 break;
669 case IPV6_FLOWLABEL_MGR:
670 retv = ipv6_flowlabel_opt(sk, optval, optlen);
671 break;
672 case IPV6_IPSEC_POLICY:
673 case IPV6_XFRM_POLICY:
6fc0b4a7
HX		 674 retv = -EPERM;
675 if (!capable(CAP_NET_ADMIN))
676 break;
1da177e4
LT		 677 retv = xfrm_user_policy(sk, optname, optval, optlen);
678 break;
679
1da177e4
LT		 680 }
681 release_sock(sk);
682
1da177e4
LT		 683 return retv;
684
685e_inval:
686 release_sock(sk);
687 return -EINVAL;
688}
689
3fdadf7d
DM		 690int ipv6_setsockopt(struct sock *sk, int level, int optname,
691 char __user *optval, int optlen)
692{
693 int err;
694
695 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
696 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
697
698 if (level != SOL_IPV6)
699 return -ENOPROTOOPT;
700
701 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
702#ifdef CONFIG_NETFILTER
703 /* we need to exclude all possible ENOPROTOOPTs except default case */
704 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
705 optname != IPV6_XFRM_POLICY) {
706 lock_sock(sk);
707 err = nf_setsockopt(sk, PF_INET6, optname, optval,
708 optlen);
709 release_sock(sk);
710 }
711#endif
712 return err;
713}
714
715
716#ifdef CONFIG_COMPAT
717int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
543d9cfe 718 char __user *optval, int optlen)
3fdadf7d
DM		 719{
720 int err;
721
722 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
543d9cfe
ACM		 723 if (udp_prot.compat_setsockopt != NULL)
724 return udp_prot.compat_setsockopt(sk, level, optname,
725 optval, optlen);
726 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
3fdadf7d
DM		 727 }
728
729 if (level != SOL_IPV6)
730 return -ENOPROTOOPT;
731
732 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
733#ifdef CONFIG_NETFILTER
734 /* we need to exclude all possible ENOPROTOOPTs except default case */
735 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
543d9cfe 736 optname != IPV6_XFRM_POLICY) {
3fdadf7d 737 lock_sock(sk);
543d9cfe
ACM		 738 err = compat_nf_setsockopt(sk, PF_INET6, optname,
739 optval, optlen);
3fdadf7d
DM		 740 release_sock(sk);
741 }
742#endif
743 return err;
744}
543d9cfe
ACM		 745
746EXPORT_SYMBOL(compat_ipv6_setsockopt);
3fdadf7d
DM		 747#endif
748
34a0b3cd
AB		 749static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_opt_hdr *hdr,
750 char __user *optval, int len)
333fad53
YH		 751{
752 if (!hdr)
753 return 0;
754 len = min_t(int, len, ipv6_optlen(hdr));
755 if (copy_to_user(optval, hdr, ipv6_optlen(hdr)))
756 return -EFAULT;
757 return len;
758}
759
3fdadf7d 760static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
1da177e4
LT		 761 char __user *optval, int __user *optlen)
762{
763 struct ipv6_pinfo *np = inet6_sk(sk);
764 int len;
765 int val;
766
1da177e4
LT		 767 if (get_user(len, optlen))
768 return -EFAULT;
769 switch (optname) {
770 case IPV6_ADDRFORM:
771 if (sk->sk_protocol != IPPROTO_UDP &&
772 sk->sk_protocol != IPPROTO_TCP)
773 return -EINVAL;
774 if (sk->sk_state != TCP_ESTABLISHED)
775 return -ENOTCONN;
776 val = sk->sk_family;
777 break;
778 case MCAST_MSFILTER:
779 {
780 struct group_filter gsf;
781 int err;
782
783 if (len < GROUP_FILTER_SIZE(0))
784 return -EINVAL;
785 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
786 return -EFAULT;
787 lock_sock(sk);
788 err = ip6_mc_msfget(sk, &gsf,
789 (struct group_filter __user *)optval, optlen);
790 release_sock(sk);
791 return err;
792 }
793
333fad53 794 case IPV6_2292PKTOPTIONS:
1da177e4
LT		 795 {
796 struct msghdr msg;
797 struct sk_buff *skb;
798
799 if (sk->sk_type != SOCK_STREAM)
800 return -ENOPROTOOPT;
801
802 msg.msg_control = optval;
803 msg.msg_controllen = len;
804 msg.msg_flags = 0;
805
806 lock_sock(sk);
807 skb = np->pktoptions;
808 if (skb)
809 atomic_inc(&skb->users);
810 release_sock(sk);
811
812 if (skb) {
813 int err = datagram_recv_ctl(sk, &msg, skb);
814 kfree_skb(skb);
815 if (err)
816 return err;
817 } else {
818 if (np->rxopt.bits.rxinfo) {
819 struct in6_pktinfo src_info;
820 src_info.ipi6_ifindex = np->mcast_oif;
821 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
822 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
823 }
824 if (np->rxopt.bits.rxhlim) {
825 int hlim = np->mcast_hops;
826 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
827 }
333fad53
YH		 828 if (np->rxopt.bits.rxoinfo) {
829 struct in6_pktinfo src_info;
830 src_info.ipi6_ifindex = np->mcast_oif;
831 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
832 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
833 }
834 if (np->rxopt.bits.rxohlim) {
835 int hlim = np->mcast_hops;
836 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
837 }
1da177e4
LT		 838 }
839 len -= msg.msg_controllen;
840 return put_user(len, optlen);
841 }
842 case IPV6_MTU:
843 {
844 struct dst_entry *dst;
845 val = 0;
846 lock_sock(sk);
847 dst = sk_dst_get(sk);
848 if (dst) {
849 val = dst_mtu(dst);
850 dst_release(dst);
851 }
852 release_sock(sk);
853 if (!val)
854 return -ENOTCONN;
855 break;
856 }
857
858 case IPV6_V6ONLY:
859 val = np->ipv6only;
860 break;
861
333fad53 862 case IPV6_RECVPKTINFO:
1da177e4
LT		 863 val = np->rxopt.bits.rxinfo;
864 break;
865
333fad53
YH		 866 case IPV6_2292PKTINFO:
867 val = np->rxopt.bits.rxoinfo;
868 break;
869
870 case IPV6_RECVHOPLIMIT:
1da177e4
LT		 871 val = np->rxopt.bits.rxhlim;
872 break;
873
333fad53
YH		 874 case IPV6_2292HOPLIMIT:
875 val = np->rxopt.bits.rxohlim;
876 break;
877
878 case IPV6_RECVRTHDR:
1da177e4
LT		 879 val = np->rxopt.bits.srcrt;
880 break;
881
333fad53
YH		 882 case IPV6_2292RTHDR:
883 val = np->rxopt.bits.osrcrt;
884 break;
885
1da177e4 886 case IPV6_HOPOPTS:
333fad53
YH		 887 case IPV6_RTHDRDSTOPTS:
888 case IPV6_RTHDR:
889 case IPV6_DSTOPTS:
890 {
891
892 lock_sock(sk);
893 len = ipv6_getsockopt_sticky(sk, np->opt->hopopt,
894 optval, len);
895 release_sock(sk);
896 return put_user(len, optlen);
897 }
898
899 case IPV6_RECVHOPOPTS:
1da177e4
LT		 900 val = np->rxopt.bits.hopopts;
901 break;
902
333fad53
YH		 903 case IPV6_2292HOPOPTS:
904 val = np->rxopt.bits.ohopopts;
905 break;
906
907 case IPV6_RECVDSTOPTS:
1da177e4
LT		 908 val = np->rxopt.bits.dstopts;
909 break;
910
333fad53
YH		 911 case IPV6_2292DSTOPTS:
912 val = np->rxopt.bits.odstopts;
913 break;
914
41a1f8ea
YH		 915 case IPV6_TCLASS:
916 val = np->tclass;
917 break;
918
919 case IPV6_RECVTCLASS:
920 val = np->rxopt.bits.rxtclass;
921 break;
922
1da177e4
LT		 923 case IPV6_FLOWINFO:
924 val = np->rxopt.bits.rxflow;
925 break;
926
927 case IPV6_UNICAST_HOPS:
928 val = np->hop_limit;
929 break;
930
931 case IPV6_MULTICAST_HOPS:
932 val = np->mcast_hops;
933 break;
934
935 case IPV6_MULTICAST_LOOP:
936 val = np->mc_loop;
937 break;
938
939 case IPV6_MULTICAST_IF:
940 val = np->mcast_oif;
941 break;
942
943 case IPV6_MTU_DISCOVER:
944 val = np->pmtudisc;
945 break;
946
947 case IPV6_RECVERR:
948 val = np->recverr;
949 break;
950
951 case IPV6_FLOWINFO_SEND:
952 val = np->sndflow;
953 break;
954
955 default:
1da177e4 956 return -EINVAL;
1da177e4
LT		 957 }
958 len = min_t(unsigned int, sizeof(int), len);
959 if(put_user(len, optlen))
960 return -EFAULT;
961 if(copy_to_user(optval,&val,len))
962 return -EFAULT;
963 return 0;
964}
965
3fdadf7d
DM		 966int ipv6_getsockopt(struct sock *sk, int level, int optname,
967 char __user *optval, int __user *optlen)
968{
969 int err;
970
971 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
972 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
973
974 if(level != SOL_IPV6)
975 return -ENOPROTOOPT;
976
977 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
978#ifdef CONFIG_NETFILTER
979 /* we need to exclude all possible EINVALs except default case */
443da0d5 980 if (err == -EINVAL && optname != IPV6_ADDRFORM &&
3fdadf7d
DM		 981 optname != MCAST_MSFILTER) {
982 int len;
983
984 if (get_user(len, optlen))
985 return -EFAULT;
986
987 lock_sock(sk);
988 err = nf_getsockopt(sk, PF_INET6, optname, optval,
989 &len);
990 release_sock(sk);
991 if (err >= 0)
992 err = put_user(len, optlen);
993 }
994#endif
995 return err;
996}
997
998#ifdef CONFIG_COMPAT
999int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
543d9cfe 1000 char __user *optval, int __user *optlen)
3fdadf7d
DM		 1001{
1002 int err;
1003
1004 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
543d9cfe
ACM		 1005 if (udp_prot.compat_getsockopt != NULL)
1006 return udp_prot.compat_getsockopt(sk, level, optname,
1007 optval, optlen);
1008 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
3fdadf7d
DM		 1009 }
1010
543d9cfe 1011 if (level != SOL_IPV6)
3fdadf7d
DM		 1012 return -ENOPROTOOPT;
1013
1014 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1015#ifdef CONFIG_NETFILTER
1016 /* we need to exclude all possible EINVALs except default case */
443da0d5 1017 if (err == -EINVAL && optname != IPV6_ADDRFORM &&
3fdadf7d
DM		 1018 optname != MCAST_MSFILTER) {
1019 int len;
1020
1021 if (get_user(len, optlen))
1022 return -EFAULT;
1023
1024 lock_sock(sk);
543d9cfe
ACM		 1025 err = compat_nf_getsockopt(sk, PF_INET6,
1026 optname, optval, &len);
3fdadf7d
DM		 1027 release_sock(sk);
1028 if (err >= 0)
1029 err = put_user(len, optlen);
1030 }
1031#endif
1032 return err;
1033}
543d9cfe
ACM		 1034
1035EXPORT_SYMBOL(compat_ipv6_getsockopt);
3fdadf7d
DM		 1036#endif
1037
1da177e4
LT		 1038void __init ipv6_packet_init(void)
1039{
1040 dev_add_pack(&ipv6_packet_type);
1041}
1042
1043void ipv6_packet_cleanup(void)
1044{
1045 dev_remove_pack(&ipv6_packet_type);
1046}
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