Commit | Line | Data |
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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> | |
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 | ||
ba89966c | 58 | DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly; |
1da177e4 LT |
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); | |
a51482bd | 83 | kfree(new_ra); |
1da177e4 LT |
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 | ||
1da177e4 LT |
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 | ||
e6848976 ACM |
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 | ||
1da177e4 | 165 | if (sk->sk_protocol == IPPROTO_TCP) { |
d83d8461 | 166 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 LT |
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; | |
d83d8461 | 173 | icsk->icsk_af_ops = &ipv4_specific; |
1da177e4 LT |
174 | sk->sk_socket->ops = &inet_stream_ops; |
175 | sk->sk_family = PF_INET; | |
d83d8461 | 176 | tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); |
1da177e4 LT |
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; | |
e6848976 ACM |
194 | /* |
195 | * ... and add it to the refcnt debug socks count | |
196 | * in the new family. -acme | |
197 | */ | |
198 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
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 | ||
333fad53 | 212 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
213 | np->rxopt.bits.rxinfo = valbool; |
214 | retv = 0; | |
215 | break; | |
333fad53 YH |
216 | |
217 | case IPV6_2292PKTINFO: | |
218 | np->rxopt.bits.rxoinfo = valbool; | |
219 | retv = 0; | |
220 | break; | |
1da177e4 | 221 | |
333fad53 | 222 | case IPV6_RECVHOPLIMIT: |
1da177e4 LT |
223 | np->rxopt.bits.rxhlim = valbool; |
224 | retv = 0; | |
225 | break; | |
226 | ||
333fad53 YH |
227 | case IPV6_2292HOPLIMIT: |
228 | np->rxopt.bits.rxohlim = valbool; | |
229 | retv = 0; | |
230 | break; | |
231 | ||
232 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
233 | if (val < 0 || val > 2) |
234 | goto e_inval; | |
235 | np->rxopt.bits.srcrt = val; | |
236 | retv = 0; | |
237 | break; | |
238 | ||
333fad53 YH |
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: | |
1da177e4 LT |
247 | np->rxopt.bits.hopopts = valbool; |
248 | retv = 0; | |
249 | break; | |
250 | ||
333fad53 YH |
251 | case IPV6_2292HOPOPTS: |
252 | np->rxopt.bits.ohopopts = valbool; | |
253 | retv = 0; | |
254 | break; | |
255 | ||
256 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
257 | np->rxopt.bits.dstopts = valbool; |
258 | retv = 0; | |
259 | break; | |
260 | ||
333fad53 YH |
261 | case IPV6_2292DSTOPTS: |
262 | np->rxopt.bits.odstopts = valbool; | |
263 | retv = 0; | |
264 | break; | |
265 | ||
41a1f8ea YH |
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 | ||
1da177e4 LT |
278 | case IPV6_FLOWINFO: |
279 | np->rxopt.bits.rxflow = valbool; | |
280 | retv = 0; | |
281 | break; | |
282 | ||
333fad53 YH |
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) | |
cb422c46 | 290 | optval = NULL; |
333fad53 YH |
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; | |
d83d8461 | 320 | if (inet_sk(sk)->is_icsk) { |
333fad53 | 321 | if (opt) { |
d83d8461 | 322 | struct inet_connection_sock *icsk = inet_csk(sk); |
333fad53 YH |
323 | if (!((1 << sk->sk_state) & |
324 | (TCPF_LISTEN | TCPF_CLOSE)) | |
325 | && inet_sk(sk)->daddr != LOOPBACK4_IPV6) { | |
d83d8461 ACM |
326 | icsk->icsk_ext_hdr_len = |
327 | opt->opt_flen + opt->opt_nflen; | |
328 | icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); | |
333fad53 YH |
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: | |
1da177e4 LT |
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 | ||
41a1f8ea | 379 | retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk); |
1da177e4 LT |
380 | if (retv) |
381 | goto done; | |
382 | update: | |
383 | retv = 0; | |
d83d8461 | 384 | if (inet_sk(sk)->is_icsk) { |
1da177e4 | 385 | if (opt) { |
d83d8461 | 386 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 LT |
387 | if (!((1 << sk->sk_state) & |
388 | (TCPF_LISTEN | TCPF_CLOSE)) | |
389 | && inet_sk(sk)->daddr != LOOPBACK4_IPV6) { | |
d83d8461 ACM |
390 | icsk->icsk_ext_hdr_len = |
391 | opt->opt_flen + opt->opt_nflen; | |
392 | icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); | |
1da177e4 LT |
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); | |
c9e3e8b6 DS |
529 | /* prior join w/ different source is ok */ |
530 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
531 | break; |
532 | omode = MCAST_INCLUDE; | |
533 | add = 1; | |
c9e3e8b6 | 534 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
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 | { | |
1da177e4 LT |
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: | |
6fc0b4a7 HX |
609 | retv = -EPERM; |
610 | if (!capable(CAP_NET_ADMIN)) | |
611 | break; | |
1da177e4 LT |
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 | ||
34a0b3cd AB |
633 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_opt_hdr *hdr, |
634 | char __user *optval, int len) | |
333fad53 YH |
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 | ||
1da177e4 LT |
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 | ||
333fad53 | 682 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
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 | } | |
333fad53 YH |
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 | } | |
1da177e4 LT |
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 | ||
333fad53 | 750 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
751 | val = np->rxopt.bits.rxinfo; |
752 | break; | |
753 | ||
333fad53 YH |
754 | case IPV6_2292PKTINFO: |
755 | val = np->rxopt.bits.rxoinfo; | |
756 | break; | |
757 | ||
758 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
759 | val = np->rxopt.bits.rxhlim; |
760 | break; | |
761 | ||
333fad53 YH |
762 | case IPV6_2292HOPLIMIT: |
763 | val = np->rxopt.bits.rxohlim; | |
764 | break; | |
765 | ||
766 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
767 | val = np->rxopt.bits.srcrt; |
768 | break; | |
769 | ||
333fad53 YH |
770 | case IPV6_2292RTHDR: |
771 | val = np->rxopt.bits.osrcrt; | |
772 | break; | |
773 | ||
1da177e4 | 774 | case IPV6_HOPOPTS: |
333fad53 YH |
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: | |
1da177e4 LT |
788 | val = np->rxopt.bits.hopopts; |
789 | break; | |
790 | ||
333fad53 YH |
791 | case IPV6_2292HOPOPTS: |
792 | val = np->rxopt.bits.ohopopts; | |
793 | break; | |
794 | ||
795 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
796 | val = np->rxopt.bits.dstopts; |
797 | break; | |
798 | ||
333fad53 YH |
799 | case IPV6_2292DSTOPTS: |
800 | val = np->rxopt.bits.odstopts; | |
801 | break; | |
802 | ||
41a1f8ea YH |
803 | case IPV6_TCLASS: |
804 | val = np->tclass; | |
805 | break; | |
806 | ||
807 | case IPV6_RECVTCLASS: | |
808 | val = np->rxopt.bits.rxtclass; | |
809 | break; | |
810 | ||
1da177e4 LT |
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 | } |