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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IPv6 BSD socket options interface | |
1ab1457c | 3 | * Linux INET6 implementation |
1da177e4 LT |
4 | * |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
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> | |
1da177e4 LT |
34 | #include <linux/net.h> |
35 | #include <linux/in6.h> | |
36 | #include <linux/netdevice.h> | |
37 | #include <linux/if_arp.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/sysctl.h> | |
40 | #include <linux/netfilter.h> | |
41 | ||
42 | #include <net/sock.h> | |
43 | #include <net/snmp.h> | |
44 | #include <net/ipv6.h> | |
45 | #include <net/ndisc.h> | |
46 | #include <net/protocol.h> | |
47 | #include <net/transp_v6.h> | |
48 | #include <net/ip6_route.h> | |
49 | #include <net/addrconf.h> | |
50 | #include <net/inet_common.h> | |
51 | #include <net/tcp.h> | |
52 | #include <net/udp.h> | |
ba4e58ec | 53 | #include <net/udplite.h> |
1da177e4 LT |
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 | 59 | |
1da177e4 LT |
60 | struct ip6_ra_chain *ip6_ra_chain; |
61 | DEFINE_RWLOCK(ip6_ra_lock); | |
62 | ||
63 | int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *)) | |
64 | { | |
65 | struct ip6_ra_chain *ra, *new_ra, **rap; | |
66 | ||
67 | /* RA packet may be delivered ONLY to IPPROTO_RAW socket */ | |
68 | if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW) | |
69 | return -EINVAL; | |
70 | ||
71 | new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; | |
72 | ||
73 | write_lock_bh(&ip6_ra_lock); | |
74 | for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) { | |
75 | if (ra->sk == sk) { | |
76 | if (sel>=0) { | |
77 | write_unlock_bh(&ip6_ra_lock); | |
a51482bd | 78 | kfree(new_ra); |
1da177e4 LT |
79 | return -EADDRINUSE; |
80 | } | |
81 | ||
82 | *rap = ra->next; | |
83 | write_unlock_bh(&ip6_ra_lock); | |
84 | ||
85 | if (ra->destructor) | |
86 | ra->destructor(sk); | |
87 | sock_put(sk); | |
88 | kfree(ra); | |
89 | return 0; | |
90 | } | |
91 | } | |
92 | if (new_ra == NULL) { | |
93 | write_unlock_bh(&ip6_ra_lock); | |
94 | return -ENOBUFS; | |
95 | } | |
96 | new_ra->sk = sk; | |
97 | new_ra->sel = sel; | |
98 | new_ra->destructor = destructor; | |
99 | new_ra->next = ra; | |
100 | *rap = new_ra; | |
101 | sock_hold(sk); | |
102 | write_unlock_bh(&ip6_ra_lock); | |
103 | return 0; | |
104 | } | |
105 | ||
3fdadf7d | 106 | static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
107 | char __user *optval, int optlen) |
108 | { | |
109 | struct ipv6_pinfo *np = inet6_sk(sk); | |
8a3edd80 | 110 | struct net *net = sk->sk_net; |
1da177e4 LT |
111 | int val, valbool; |
112 | int retv = -ENOPROTOOPT; | |
113 | ||
1da177e4 LT |
114 | if (optval == NULL) |
115 | val=0; | |
116 | else if (get_user(val, (int __user *) optval)) | |
117 | return -EFAULT; | |
118 | ||
119 | valbool = (val!=0); | |
120 | ||
121 | lock_sock(sk); | |
122 | ||
123 | switch (optname) { | |
124 | ||
125 | case IPV6_ADDRFORM: | |
126 | if (val == PF_INET) { | |
127 | struct ipv6_txoptions *opt; | |
128 | struct sk_buff *pktopt; | |
129 | ||
130 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 131 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 LT |
132 | sk->sk_protocol != IPPROTO_TCP) |
133 | break; | |
134 | ||
135 | if (sk->sk_state != TCP_ESTABLISHED) { | |
136 | retv = -ENOTCONN; | |
137 | break; | |
138 | } | |
139 | ||
140 | if (ipv6_only_sock(sk) || | |
e773e4fa | 141 | !ipv6_addr_v4mapped(&np->daddr)) { |
1da177e4 LT |
142 | retv = -EADDRNOTAVAIL; |
143 | break; | |
144 | } | |
145 | ||
146 | fl6_free_socklist(sk); | |
147 | ipv6_sock_mc_close(sk); | |
148 | ||
e6848976 ACM |
149 | /* |
150 | * Sock is moving from IPv6 to IPv4 (sk_prot), so | |
151 | * remove it from the refcnt debug socks count in the | |
152 | * original family... | |
153 | */ | |
154 | sk_refcnt_debug_dec(sk); | |
155 | ||
1da177e4 | 156 | if (sk->sk_protocol == IPPROTO_TCP) { |
d83d8461 | 157 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 LT |
158 | |
159 | local_bh_disable(); | |
65f76517 ED |
160 | sock_prot_inuse_add(sk->sk_prot, -1); |
161 | sock_prot_inuse_add(&tcp_prot, 1); | |
1da177e4 LT |
162 | local_bh_enable(); |
163 | sk->sk_prot = &tcp_prot; | |
d83d8461 | 164 | icsk->icsk_af_ops = &ipv4_specific; |
1da177e4 LT |
165 | sk->sk_socket->ops = &inet_stream_ops; |
166 | sk->sk_family = PF_INET; | |
d83d8461 | 167 | tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); |
1da177e4 | 168 | } else { |
ba4e58ec GR |
169 | struct proto *prot = &udp_prot; |
170 | ||
db8dac20 | 171 | if (sk->sk_protocol == IPPROTO_UDPLITE) |
ba4e58ec | 172 | prot = &udplite_prot; |
1da177e4 | 173 | local_bh_disable(); |
65f76517 ED |
174 | sock_prot_inuse_add(sk->sk_prot, -1); |
175 | sock_prot_inuse_add(prot, 1); | |
1da177e4 | 176 | local_bh_enable(); |
ba4e58ec | 177 | sk->sk_prot = prot; |
1da177e4 LT |
178 | sk->sk_socket->ops = &inet_dgram_ops; |
179 | sk->sk_family = PF_INET; | |
180 | } | |
181 | opt = xchg(&np->opt, NULL); | |
182 | if (opt) | |
183 | sock_kfree_s(sk, opt, opt->tot_len); | |
184 | pktopt = xchg(&np->pktoptions, NULL); | |
185 | if (pktopt) | |
186 | kfree_skb(pktopt); | |
187 | ||
188 | sk->sk_destruct = inet_sock_destruct; | |
e6848976 ACM |
189 | /* |
190 | * ... and add it to the refcnt debug socks count | |
191 | * in the new family. -acme | |
192 | */ | |
193 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
194 | module_put(THIS_MODULE); |
195 | retv = 0; | |
196 | break; | |
197 | } | |
198 | goto e_inval; | |
199 | ||
200 | case IPV6_V6ONLY: | |
201 | if (inet_sk(sk)->num) | |
202 | goto e_inval; | |
203 | np->ipv6only = valbool; | |
204 | retv = 0; | |
205 | break; | |
206 | ||
333fad53 | 207 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
208 | np->rxopt.bits.rxinfo = valbool; |
209 | retv = 0; | |
210 | break; | |
1ab1457c | 211 | |
333fad53 YH |
212 | case IPV6_2292PKTINFO: |
213 | np->rxopt.bits.rxoinfo = valbool; | |
214 | retv = 0; | |
215 | break; | |
1da177e4 | 216 | |
333fad53 | 217 | case IPV6_RECVHOPLIMIT: |
1da177e4 LT |
218 | np->rxopt.bits.rxhlim = valbool; |
219 | retv = 0; | |
220 | break; | |
221 | ||
333fad53 YH |
222 | case IPV6_2292HOPLIMIT: |
223 | np->rxopt.bits.rxohlim = valbool; | |
224 | retv = 0; | |
225 | break; | |
226 | ||
227 | case IPV6_RECVRTHDR: | |
4c752098 | 228 | np->rxopt.bits.srcrt = valbool; |
1da177e4 LT |
229 | retv = 0; |
230 | break; | |
231 | ||
333fad53 | 232 | case IPV6_2292RTHDR: |
4c752098 | 233 | np->rxopt.bits.osrcrt = valbool; |
333fad53 YH |
234 | retv = 0; |
235 | break; | |
236 | ||
237 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
238 | np->rxopt.bits.hopopts = valbool; |
239 | retv = 0; | |
240 | break; | |
241 | ||
333fad53 YH |
242 | case IPV6_2292HOPOPTS: |
243 | np->rxopt.bits.ohopopts = valbool; | |
244 | retv = 0; | |
245 | break; | |
246 | ||
247 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
248 | np->rxopt.bits.dstopts = valbool; |
249 | retv = 0; | |
250 | break; | |
251 | ||
333fad53 YH |
252 | case IPV6_2292DSTOPTS: |
253 | np->rxopt.bits.odstopts = valbool; | |
254 | retv = 0; | |
255 | break; | |
256 | ||
41a1f8ea | 257 | case IPV6_TCLASS: |
d0ee011f | 258 | if (val < -1 || val > 0xff) |
41a1f8ea YH |
259 | goto e_inval; |
260 | np->tclass = val; | |
261 | retv = 0; | |
262 | break; | |
1ab1457c | 263 | |
41a1f8ea YH |
264 | case IPV6_RECVTCLASS: |
265 | np->rxopt.bits.rxtclass = valbool; | |
266 | retv = 0; | |
267 | break; | |
268 | ||
1da177e4 LT |
269 | case IPV6_FLOWINFO: |
270 | np->rxopt.bits.rxflow = valbool; | |
271 | retv = 0; | |
272 | break; | |
273 | ||
333fad53 YH |
274 | case IPV6_HOPOPTS: |
275 | case IPV6_RTHDRDSTOPTS: | |
276 | case IPV6_RTHDR: | |
277 | case IPV6_DSTOPTS: | |
278 | { | |
279 | struct ipv6_txoptions *opt; | |
280 | if (optlen == 0) | |
cb422c46 | 281 | optval = NULL; |
333fad53 YH |
282 | |
283 | /* hop-by-hop / destination options are privileged option */ | |
284 | retv = -EPERM; | |
285 | if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) | |
286 | break; | |
287 | ||
288 | retv = -EINVAL; | |
289 | if (optlen & 0x7 || optlen > 8 * 255) | |
290 | break; | |
291 | ||
292 | opt = ipv6_renew_options(sk, np->opt, optname, | |
293 | (struct ipv6_opt_hdr __user *)optval, | |
294 | optlen); | |
295 | if (IS_ERR(opt)) { | |
296 | retv = PTR_ERR(opt); | |
297 | break; | |
298 | } | |
299 | ||
300 | /* routing header option needs extra check */ | |
dfee0a72 | 301 | if (optname == IPV6_RTHDR && opt && opt->srcrt) { |
333fad53 | 302 | struct ipv6_rt_hdr *rthdr = opt->srcrt; |
280a9d34 | 303 | switch (rthdr->type) { |
59fbb3a6 | 304 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
280a9d34 | 305 | case IPV6_SRCRT_TYPE_2: |
280a9d34 | 306 | break; |
bb4dbf9e | 307 | #endif |
280a9d34 | 308 | default: |
333fad53 | 309 | goto sticky_done; |
280a9d34 MN |
310 | } |
311 | ||
333fad53 YH |
312 | if ((rthdr->hdrlen & 1) || |
313 | (rthdr->hdrlen >> 1) != rthdr->segments_left) | |
314 | goto sticky_done; | |
315 | } | |
316 | ||
317 | retv = 0; | |
d83d8461 | 318 | if (inet_sk(sk)->is_icsk) { |
333fad53 | 319 | if (opt) { |
d83d8461 | 320 | struct inet_connection_sock *icsk = inet_csk(sk); |
333fad53 YH |
321 | if (!((1 << sk->sk_state) & |
322 | (TCPF_LISTEN | TCPF_CLOSE)) | |
323 | && inet_sk(sk)->daddr != LOOPBACK4_IPV6) { | |
d83d8461 ACM |
324 | icsk->icsk_ext_hdr_len = |
325 | opt->opt_flen + opt->opt_nflen; | |
326 | icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); | |
333fad53 YH |
327 | } |
328 | } | |
329 | opt = xchg(&np->opt, opt); | |
330 | sk_dst_reset(sk); | |
331 | } else { | |
332 | write_lock(&sk->sk_dst_lock); | |
333 | opt = xchg(&np->opt, opt); | |
334 | write_unlock(&sk->sk_dst_lock); | |
335 | sk_dst_reset(sk); | |
336 | } | |
337 | sticky_done: | |
338 | if (opt) | |
339 | sock_kfree_s(sk, opt, opt->tot_len); | |
340 | break; | |
341 | } | |
342 | ||
343 | case IPV6_2292PKTOPTIONS: | |
1da177e4 LT |
344 | { |
345 | struct ipv6_txoptions *opt = NULL; | |
346 | struct msghdr msg; | |
347 | struct flowi fl; | |
348 | int junk; | |
349 | ||
350 | fl.fl6_flowlabel = 0; | |
351 | fl.oif = sk->sk_bound_dev_if; | |
352 | ||
353 | if (optlen == 0) | |
354 | goto update; | |
355 | ||
356 | /* 1K is probably excessive | |
357 | * 1K is surely not enough, 2K per standard header is 16K. | |
358 | */ | |
359 | retv = -EINVAL; | |
360 | if (optlen > 64*1024) | |
361 | break; | |
362 | ||
363 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
364 | retv = -ENOBUFS; | |
365 | if (opt == NULL) | |
366 | break; | |
367 | ||
368 | memset(opt, 0, sizeof(*opt)); | |
369 | opt->tot_len = sizeof(*opt) + optlen; | |
370 | retv = -EFAULT; | |
371 | if (copy_from_user(opt+1, optval, optlen)) | |
372 | goto done; | |
373 | ||
374 | msg.msg_controllen = optlen; | |
375 | msg.msg_control = (void*)(opt+1); | |
376 | ||
41a1f8ea | 377 | retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk); |
1da177e4 LT |
378 | if (retv) |
379 | goto done; | |
380 | update: | |
381 | retv = 0; | |
d83d8461 | 382 | if (inet_sk(sk)->is_icsk) { |
1da177e4 | 383 | if (opt) { |
d83d8461 | 384 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 LT |
385 | if (!((1 << sk->sk_state) & |
386 | (TCPF_LISTEN | TCPF_CLOSE)) | |
387 | && inet_sk(sk)->daddr != LOOPBACK4_IPV6) { | |
d83d8461 ACM |
388 | icsk->icsk_ext_hdr_len = |
389 | opt->opt_flen + opt->opt_nflen; | |
390 | icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); | |
1da177e4 LT |
391 | } |
392 | } | |
393 | opt = xchg(&np->opt, opt); | |
394 | sk_dst_reset(sk); | |
395 | } else { | |
396 | write_lock(&sk->sk_dst_lock); | |
397 | opt = xchg(&np->opt, opt); | |
398 | write_unlock(&sk->sk_dst_lock); | |
399 | sk_dst_reset(sk); | |
400 | } | |
401 | ||
402 | done: | |
403 | if (opt) | |
404 | sock_kfree_s(sk, opt, opt->tot_len); | |
405 | break; | |
406 | } | |
407 | case IPV6_UNICAST_HOPS: | |
408 | if (val > 255 || val < -1) | |
409 | goto e_inval; | |
410 | np->hop_limit = val; | |
411 | retv = 0; | |
412 | break; | |
413 | ||
414 | case IPV6_MULTICAST_HOPS: | |
415 | if (sk->sk_type == SOCK_STREAM) | |
416 | goto e_inval; | |
417 | if (val > 255 || val < -1) | |
418 | goto e_inval; | |
419 | np->mcast_hops = val; | |
420 | retv = 0; | |
421 | break; | |
422 | ||
423 | case IPV6_MULTICAST_LOOP: | |
424 | np->mc_loop = valbool; | |
425 | retv = 0; | |
426 | break; | |
427 | ||
428 | case IPV6_MULTICAST_IF: | |
429 | if (sk->sk_type == SOCK_STREAM) | |
430 | goto e_inval; | |
1da177e4 | 431 | |
4953f0fc BH |
432 | if (val) { |
433 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) | |
434 | goto e_inval; | |
435 | ||
8a3edd80 | 436 | if (__dev_get_by_index(net, val) == NULL) { |
4953f0fc BH |
437 | retv = -ENODEV; |
438 | break; | |
439 | } | |
1da177e4 LT |
440 | } |
441 | np->mcast_oif = val; | |
442 | retv = 0; | |
443 | break; | |
444 | case IPV6_ADD_MEMBERSHIP: | |
445 | case IPV6_DROP_MEMBERSHIP: | |
446 | { | |
447 | struct ipv6_mreq mreq; | |
448 | ||
a96fb49b FL |
449 | retv = -EPROTO; |
450 | if (inet_sk(sk)->is_icsk) | |
451 | break; | |
452 | ||
1da177e4 LT |
453 | retv = -EFAULT; |
454 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
455 | break; | |
456 | ||
457 | if (optname == IPV6_ADD_MEMBERSHIP) | |
458 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
459 | else | |
460 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
461 | break; | |
462 | } | |
463 | case IPV6_JOIN_ANYCAST: | |
464 | case IPV6_LEAVE_ANYCAST: | |
465 | { | |
466 | struct ipv6_mreq mreq; | |
467 | ||
468 | if (optlen != sizeof(struct ipv6_mreq)) | |
469 | goto e_inval; | |
470 | ||
471 | retv = -EFAULT; | |
472 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
473 | break; | |
474 | ||
475 | if (optname == IPV6_JOIN_ANYCAST) | |
476 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
477 | else | |
478 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
479 | break; | |
480 | } | |
481 | case MCAST_JOIN_GROUP: | |
482 | case MCAST_LEAVE_GROUP: | |
483 | { | |
484 | struct group_req greq; | |
485 | struct sockaddr_in6 *psin6; | |
486 | ||
487 | retv = -EFAULT; | |
488 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
489 | break; | |
490 | if (greq.gr_group.ss_family != AF_INET6) { | |
491 | retv = -EADDRNOTAVAIL; | |
492 | break; | |
493 | } | |
494 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
495 | if (optname == MCAST_JOIN_GROUP) | |
496 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, | |
497 | &psin6->sin6_addr); | |
498 | else | |
499 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, | |
500 | &psin6->sin6_addr); | |
501 | break; | |
502 | } | |
503 | case MCAST_JOIN_SOURCE_GROUP: | |
504 | case MCAST_LEAVE_SOURCE_GROUP: | |
505 | case MCAST_BLOCK_SOURCE: | |
506 | case MCAST_UNBLOCK_SOURCE: | |
507 | { | |
508 | struct group_source_req greqs; | |
509 | int omode, add; | |
510 | ||
511 | if (optlen != sizeof(struct group_source_req)) | |
512 | goto e_inval; | |
513 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
514 | retv = -EFAULT; | |
515 | break; | |
516 | } | |
517 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
518 | greqs.gsr_source.ss_family != AF_INET6) { | |
519 | retv = -EADDRNOTAVAIL; | |
520 | break; | |
521 | } | |
522 | if (optname == MCAST_BLOCK_SOURCE) { | |
523 | omode = MCAST_EXCLUDE; | |
524 | add = 1; | |
525 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
526 | omode = MCAST_EXCLUDE; | |
527 | add = 0; | |
528 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
529 | struct sockaddr_in6 *psin6; | |
530 | ||
531 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
532 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, | |
533 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
534 | /* prior join w/ different source is ok */ |
535 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
536 | break; |
537 | omode = MCAST_INCLUDE; | |
538 | add = 1; | |
c9e3e8b6 | 539 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
540 | omode = MCAST_INCLUDE; |
541 | add = 0; | |
542 | } | |
543 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
544 | break; | |
545 | } | |
546 | case MCAST_MSFILTER: | |
547 | { | |
1da177e4 LT |
548 | extern int sysctl_mld_max_msf; |
549 | struct group_filter *gsf; | |
550 | ||
551 | if (optlen < GROUP_FILTER_SIZE(0)) | |
552 | goto e_inval; | |
553 | if (optlen > sysctl_optmem_max) { | |
554 | retv = -ENOBUFS; | |
555 | break; | |
556 | } | |
8b3a7005 | 557 | gsf = kmalloc(optlen,GFP_KERNEL); |
cfcabdcc | 558 | if (!gsf) { |
1da177e4 LT |
559 | retv = -ENOBUFS; |
560 | break; | |
561 | } | |
562 | retv = -EFAULT; | |
563 | if (copy_from_user(gsf, optval, optlen)) { | |
564 | kfree(gsf); | |
565 | break; | |
566 | } | |
567 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
568 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
569 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
570 | kfree(gsf); | |
571 | retv = -ENOBUFS; | |
572 | break; | |
573 | } | |
574 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
575 | kfree(gsf); | |
576 | retv = -EINVAL; | |
577 | break; | |
578 | } | |
579 | retv = ip6_mc_msfilter(sk, gsf); | |
580 | kfree(gsf); | |
581 | ||
582 | break; | |
583 | } | |
584 | case IPV6_ROUTER_ALERT: | |
585 | retv = ip6_ra_control(sk, val, NULL); | |
586 | break; | |
587 | case IPV6_MTU_DISCOVER: | |
628a5c56 | 588 | if (val<0 || val>3) |
1da177e4 LT |
589 | goto e_inval; |
590 | np->pmtudisc = val; | |
591 | retv = 0; | |
592 | break; | |
593 | case IPV6_MTU: | |
594 | if (val && val < IPV6_MIN_MTU) | |
595 | goto e_inval; | |
596 | np->frag_size = val; | |
597 | retv = 0; | |
598 | break; | |
599 | case IPV6_RECVERR: | |
600 | np->recverr = valbool; | |
601 | if (!val) | |
602 | skb_queue_purge(&sk->sk_error_queue); | |
603 | retv = 0; | |
604 | break; | |
605 | case IPV6_FLOWINFO_SEND: | |
606 | np->sndflow = valbool; | |
607 | retv = 0; | |
608 | break; | |
609 | case IPV6_FLOWLABEL_MGR: | |
610 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
611 | break; | |
612 | case IPV6_IPSEC_POLICY: | |
613 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 HX |
614 | retv = -EPERM; |
615 | if (!capable(CAP_NET_ADMIN)) | |
616 | break; | |
1da177e4 LT |
617 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
618 | break; | |
619 | ||
7cbca67c YH |
620 | case IPV6_ADDR_PREFERENCES: |
621 | { | |
622 | unsigned int pref = 0; | |
623 | unsigned int prefmask = ~0; | |
624 | ||
625 | retv = -EINVAL; | |
626 | ||
627 | /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ | |
628 | switch (val & (IPV6_PREFER_SRC_PUBLIC| | |
629 | IPV6_PREFER_SRC_TMP| | |
630 | IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { | |
631 | case IPV6_PREFER_SRC_PUBLIC: | |
632 | pref |= IPV6_PREFER_SRC_PUBLIC; | |
633 | break; | |
634 | case IPV6_PREFER_SRC_TMP: | |
635 | pref |= IPV6_PREFER_SRC_TMP; | |
636 | break; | |
637 | case IPV6_PREFER_SRC_PUBTMP_DEFAULT: | |
638 | break; | |
639 | case 0: | |
640 | goto pref_skip_pubtmp; | |
641 | default: | |
642 | goto e_inval; | |
643 | } | |
644 | ||
645 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| | |
646 | IPV6_PREFER_SRC_TMP); | |
647 | pref_skip_pubtmp: | |
648 | ||
649 | /* check HOME/COA conflicts */ | |
650 | switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { | |
651 | case IPV6_PREFER_SRC_HOME: | |
652 | break; | |
653 | case IPV6_PREFER_SRC_COA: | |
654 | pref |= IPV6_PREFER_SRC_COA; | |
655 | case 0: | |
656 | goto pref_skip_coa; | |
657 | default: | |
658 | goto e_inval; | |
659 | } | |
660 | ||
661 | prefmask &= ~IPV6_PREFER_SRC_COA; | |
662 | pref_skip_coa: | |
663 | ||
664 | /* check CGA/NONCGA conflicts */ | |
665 | switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { | |
666 | case IPV6_PREFER_SRC_CGA: | |
667 | case IPV6_PREFER_SRC_NONCGA: | |
668 | case 0: | |
669 | break; | |
670 | default: | |
671 | goto e_inval; | |
672 | } | |
673 | ||
674 | np->srcprefs = (np->srcprefs & prefmask) | pref; | |
675 | retv = 0; | |
676 | ||
677 | break; | |
678 | } | |
1da177e4 | 679 | } |
7cbca67c | 680 | |
1da177e4 LT |
681 | release_sock(sk); |
682 | ||
1da177e4 LT |
683 | return retv; |
684 | ||
685 | e_inval: | |
686 | release_sock(sk); | |
687 | return -EINVAL; | |
688 | } | |
689 | ||
3fdadf7d DM |
690 | int 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 | ||
7159039a | 715 | EXPORT_SYMBOL(ipv6_setsockopt); |
3fdadf7d DM |
716 | |
717 | #ifdef CONFIG_COMPAT | |
718 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 719 | char __user *optval, int optlen) |
3fdadf7d DM |
720 | { |
721 | int err; | |
722 | ||
723 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
724 | if (udp_prot.compat_setsockopt != NULL) |
725 | return udp_prot.compat_setsockopt(sk, level, optname, | |
726 | optval, optlen); | |
727 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
728 | } |
729 | ||
730 | if (level != SOL_IPV6) | |
731 | return -ENOPROTOOPT; | |
732 | ||
733 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
734 | #ifdef CONFIG_NETFILTER | |
735 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
736 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
543d9cfe | 737 | optname != IPV6_XFRM_POLICY) { |
3fdadf7d | 738 | lock_sock(sk); |
543d9cfe ACM |
739 | err = compat_nf_setsockopt(sk, PF_INET6, optname, |
740 | optval, optlen); | |
3fdadf7d DM |
741 | release_sock(sk); |
742 | } | |
743 | #endif | |
744 | return err; | |
745 | } | |
543d9cfe ACM |
746 | |
747 | EXPORT_SYMBOL(compat_ipv6_setsockopt); | |
3fdadf7d DM |
748 | #endif |
749 | ||
28693079 | 750 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, |
4c6510a7 | 751 | int optname, char __user *optval, int len) |
333fad53 | 752 | { |
28693079 DM |
753 | struct ipv6_opt_hdr *hdr; |
754 | ||
4c6510a7 YH |
755 | if (!opt) |
756 | return 0; | |
757 | ||
758 | switch(optname) { | |
759 | case IPV6_HOPOPTS: | |
760 | hdr = opt->hopopt; | |
761 | break; | |
762 | case IPV6_RTHDRDSTOPTS: | |
763 | hdr = opt->dst0opt; | |
764 | break; | |
765 | case IPV6_RTHDR: | |
766 | hdr = (struct ipv6_opt_hdr *)opt->srcrt; | |
767 | break; | |
768 | case IPV6_DSTOPTS: | |
769 | hdr = opt->dst1opt; | |
770 | break; | |
771 | default: | |
772 | return -EINVAL; /* should not happen */ | |
773 | } | |
774 | ||
775 | if (!hdr) | |
333fad53 | 776 | return 0; |
28693079 | 777 | |
d2b02ed9 | 778 | len = min_t(unsigned int, len, ipv6_optlen(hdr)); |
660adc6e | 779 | if (copy_to_user(optval, hdr, len)) |
333fad53 | 780 | return -EFAULT; |
e5268f12 | 781 | return ipv6_optlen(hdr); |
333fad53 YH |
782 | } |
783 | ||
3fdadf7d | 784 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
785 | char __user *optval, int __user *optlen) |
786 | { | |
787 | struct ipv6_pinfo *np = inet6_sk(sk); | |
788 | int len; | |
789 | int val; | |
790 | ||
1da177e4 LT |
791 | if (get_user(len, optlen)) |
792 | return -EFAULT; | |
793 | switch (optname) { | |
794 | case IPV6_ADDRFORM: | |
795 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 796 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 LT |
797 | sk->sk_protocol != IPPROTO_TCP) |
798 | return -EINVAL; | |
799 | if (sk->sk_state != TCP_ESTABLISHED) | |
800 | return -ENOTCONN; | |
801 | val = sk->sk_family; | |
802 | break; | |
803 | case MCAST_MSFILTER: | |
804 | { | |
805 | struct group_filter gsf; | |
806 | int err; | |
807 | ||
808 | if (len < GROUP_FILTER_SIZE(0)) | |
809 | return -EINVAL; | |
810 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
811 | return -EFAULT; | |
812 | lock_sock(sk); | |
813 | err = ip6_mc_msfget(sk, &gsf, | |
814 | (struct group_filter __user *)optval, optlen); | |
815 | release_sock(sk); | |
816 | return err; | |
817 | } | |
818 | ||
333fad53 | 819 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
820 | { |
821 | struct msghdr msg; | |
822 | struct sk_buff *skb; | |
823 | ||
824 | if (sk->sk_type != SOCK_STREAM) | |
825 | return -ENOPROTOOPT; | |
826 | ||
827 | msg.msg_control = optval; | |
828 | msg.msg_controllen = len; | |
829 | msg.msg_flags = 0; | |
830 | ||
831 | lock_sock(sk); | |
832 | skb = np->pktoptions; | |
833 | if (skb) | |
834 | atomic_inc(&skb->users); | |
835 | release_sock(sk); | |
836 | ||
837 | if (skb) { | |
838 | int err = datagram_recv_ctl(sk, &msg, skb); | |
839 | kfree_skb(skb); | |
840 | if (err) | |
841 | return err; | |
842 | } else { | |
843 | if (np->rxopt.bits.rxinfo) { | |
844 | struct in6_pktinfo src_info; | |
845 | src_info.ipi6_ifindex = np->mcast_oif; | |
846 | ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); | |
847 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); | |
848 | } | |
849 | if (np->rxopt.bits.rxhlim) { | |
850 | int hlim = np->mcast_hops; | |
851 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
852 | } | |
333fad53 YH |
853 | if (np->rxopt.bits.rxoinfo) { |
854 | struct in6_pktinfo src_info; | |
855 | src_info.ipi6_ifindex = np->mcast_oif; | |
856 | ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); | |
857 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); | |
858 | } | |
859 | if (np->rxopt.bits.rxohlim) { | |
860 | int hlim = np->mcast_hops; | |
861 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
862 | } | |
1da177e4 LT |
863 | } |
864 | len -= msg.msg_controllen; | |
865 | return put_user(len, optlen); | |
866 | } | |
867 | case IPV6_MTU: | |
868 | { | |
869 | struct dst_entry *dst; | |
1ab1457c | 870 | val = 0; |
1da177e4 LT |
871 | lock_sock(sk); |
872 | dst = sk_dst_get(sk); | |
873 | if (dst) { | |
874 | val = dst_mtu(dst); | |
875 | dst_release(dst); | |
876 | } | |
877 | release_sock(sk); | |
878 | if (!val) | |
879 | return -ENOTCONN; | |
880 | break; | |
881 | } | |
882 | ||
883 | case IPV6_V6ONLY: | |
884 | val = np->ipv6only; | |
885 | break; | |
886 | ||
333fad53 | 887 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
888 | val = np->rxopt.bits.rxinfo; |
889 | break; | |
890 | ||
333fad53 YH |
891 | case IPV6_2292PKTINFO: |
892 | val = np->rxopt.bits.rxoinfo; | |
893 | break; | |
894 | ||
895 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
896 | val = np->rxopt.bits.rxhlim; |
897 | break; | |
898 | ||
333fad53 YH |
899 | case IPV6_2292HOPLIMIT: |
900 | val = np->rxopt.bits.rxohlim; | |
901 | break; | |
902 | ||
903 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
904 | val = np->rxopt.bits.srcrt; |
905 | break; | |
906 | ||
333fad53 YH |
907 | case IPV6_2292RTHDR: |
908 | val = np->rxopt.bits.osrcrt; | |
909 | break; | |
910 | ||
1da177e4 | 911 | case IPV6_HOPOPTS: |
333fad53 YH |
912 | case IPV6_RTHDRDSTOPTS: |
913 | case IPV6_RTHDR: | |
914 | case IPV6_DSTOPTS: | |
915 | { | |
916 | ||
917 | lock_sock(sk); | |
28693079 | 918 | len = ipv6_getsockopt_sticky(sk, np->opt, |
4c6510a7 | 919 | optname, optval, len); |
333fad53 YH |
920 | release_sock(sk); |
921 | return put_user(len, optlen); | |
922 | } | |
923 | ||
924 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
925 | val = np->rxopt.bits.hopopts; |
926 | break; | |
927 | ||
333fad53 YH |
928 | case IPV6_2292HOPOPTS: |
929 | val = np->rxopt.bits.ohopopts; | |
930 | break; | |
931 | ||
932 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
933 | val = np->rxopt.bits.dstopts; |
934 | break; | |
935 | ||
333fad53 YH |
936 | case IPV6_2292DSTOPTS: |
937 | val = np->rxopt.bits.odstopts; | |
938 | break; | |
939 | ||
41a1f8ea YH |
940 | case IPV6_TCLASS: |
941 | val = np->tclass; | |
d0ee011f RDC |
942 | if (val < 0) |
943 | val = 0; | |
41a1f8ea YH |
944 | break; |
945 | ||
946 | case IPV6_RECVTCLASS: | |
947 | val = np->rxopt.bits.rxtclass; | |
948 | break; | |
949 | ||
1da177e4 LT |
950 | case IPV6_FLOWINFO: |
951 | val = np->rxopt.bits.rxflow; | |
952 | break; | |
953 | ||
954 | case IPV6_UNICAST_HOPS: | |
1da177e4 | 955 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
956 | { |
957 | struct dst_entry *dst; | |
958 | ||
959 | if (optname == IPV6_UNICAST_HOPS) | |
960 | val = np->hop_limit; | |
961 | else | |
962 | val = np->mcast_hops; | |
963 | ||
964 | dst = sk_dst_get(sk); | |
965 | if (dst) { | |
966 | if (val < 0) | |
6b75d090 | 967 | val = ip6_dst_hoplimit(dst); |
befffe90 BH |
968 | dst_release(dst); |
969 | } | |
970 | if (val < 0) | |
971 | val = ipv6_devconf.hop_limit; | |
1da177e4 | 972 | break; |
befffe90 | 973 | } |
1da177e4 LT |
974 | |
975 | case IPV6_MULTICAST_LOOP: | |
976 | val = np->mc_loop; | |
977 | break; | |
978 | ||
979 | case IPV6_MULTICAST_IF: | |
980 | val = np->mcast_oif; | |
981 | break; | |
982 | ||
983 | case IPV6_MTU_DISCOVER: | |
984 | val = np->pmtudisc; | |
985 | break; | |
986 | ||
987 | case IPV6_RECVERR: | |
988 | val = np->recverr; | |
989 | break; | |
990 | ||
991 | case IPV6_FLOWINFO_SEND: | |
992 | val = np->sndflow; | |
993 | break; | |
994 | ||
7cbca67c YH |
995 | case IPV6_ADDR_PREFERENCES: |
996 | val = 0; | |
997 | ||
998 | if (np->srcprefs & IPV6_PREFER_SRC_TMP) | |
999 | val |= IPV6_PREFER_SRC_TMP; | |
1000 | else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) | |
1001 | val |= IPV6_PREFER_SRC_PUBLIC; | |
1002 | else { | |
1003 | /* XXX: should we return system default? */ | |
1004 | val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; | |
1005 | } | |
1006 | ||
1007 | if (np->srcprefs & IPV6_PREFER_SRC_COA) | |
1008 | val |= IPV6_PREFER_SRC_COA; | |
1009 | else | |
1010 | val |= IPV6_PREFER_SRC_HOME; | |
1011 | break; | |
1012 | ||
1da177e4 | 1013 | default: |
cf6fc4a9 | 1014 | return -ENOPROTOOPT; |
1da177e4 LT |
1015 | } |
1016 | len = min_t(unsigned int, sizeof(int), len); | |
1017 | if(put_user(len, optlen)) | |
1018 | return -EFAULT; | |
1019 | if(copy_to_user(optval,&val,len)) | |
1020 | return -EFAULT; | |
1021 | return 0; | |
1022 | } | |
1023 | ||
3fdadf7d DM |
1024 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1025 | char __user *optval, int __user *optlen) | |
1026 | { | |
1027 | int err; | |
1028 | ||
1029 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1030 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1031 | ||
1032 | if(level != SOL_IPV6) | |
1033 | return -ENOPROTOOPT; | |
1034 | ||
1035 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); | |
1036 | #ifdef CONFIG_NETFILTER | |
cf6fc4a9 WY |
1037 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1038 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1039 | int len; |
1040 | ||
1041 | if (get_user(len, optlen)) | |
1042 | return -EFAULT; | |
1043 | ||
1044 | lock_sock(sk); | |
1045 | err = nf_getsockopt(sk, PF_INET6, optname, optval, | |
1046 | &len); | |
1047 | release_sock(sk); | |
1048 | if (err >= 0) | |
1049 | err = put_user(len, optlen); | |
1050 | } | |
1051 | #endif | |
1052 | return err; | |
1053 | } | |
1054 | ||
7159039a YH |
1055 | EXPORT_SYMBOL(ipv6_getsockopt); |
1056 | ||
3fdadf7d DM |
1057 | #ifdef CONFIG_COMPAT |
1058 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1059 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1060 | { |
1061 | int err; | |
1062 | ||
1063 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1064 | if (udp_prot.compat_getsockopt != NULL) |
1065 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1066 | optval, optlen); | |
1067 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1068 | } |
1069 | ||
543d9cfe | 1070 | if (level != SOL_IPV6) |
3fdadf7d DM |
1071 | return -ENOPROTOOPT; |
1072 | ||
1073 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); | |
1074 | #ifdef CONFIG_NETFILTER | |
cf6fc4a9 WY |
1075 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1076 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1077 | int len; |
1078 | ||
1079 | if (get_user(len, optlen)) | |
1080 | return -EFAULT; | |
1081 | ||
1082 | lock_sock(sk); | |
543d9cfe ACM |
1083 | err = compat_nf_getsockopt(sk, PF_INET6, |
1084 | optname, optval, &len); | |
3fdadf7d DM |
1085 | release_sock(sk); |
1086 | if (err >= 0) | |
1087 | err = put_user(len, optlen); | |
1088 | } | |
1089 | #endif | |
1090 | return err; | |
1091 | } | |
543d9cfe ACM |
1092 | |
1093 | EXPORT_SYMBOL(compat_ipv6_getsockopt); | |
3fdadf7d DM |
1094 | #endif |
1095 |