Commit | Line | Data |
---|---|---|
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 | * | |
1da177e4 LT |
19 | * o Truncate getsockopt returns |
20 | * o Return an optlen of the truncated length if need be | |
21 | * | |
22 | * Changes: | |
23 | * David L Stevens <dlstevens@us.ibm.com>: | |
24 | * - added multicast source filtering API for MLDv2 | |
25 | */ | |
26 | ||
27 | #include <linux/module.h> | |
4fc268d2 | 28 | #include <linux/capability.h> |
1da177e4 LT |
29 | #include <linux/errno.h> |
30 | #include <linux/types.h> | |
31 | #include <linux/socket.h> | |
32 | #include <linux/sockios.h> | |
1da177e4 LT |
33 | #include <linux/net.h> |
34 | #include <linux/in6.h> | |
7bc570c8 | 35 | #include <linux/mroute6.h> |
1da177e4 LT |
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 | 54 | #include <net/xfrm.h> |
dae50295 | 55 | #include <net/compat.h> |
1da177e4 LT |
56 | |
57 | #include <asm/uaccess.h> | |
58 | ||
ba89966c | 59 | DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly; |
1da177e4 | 60 | |
1da177e4 LT |
61 | struct ip6_ra_chain *ip6_ra_chain; |
62 | DEFINE_RWLOCK(ip6_ra_lock); | |
63 | ||
64 | int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *)) | |
65 | { | |
66 | struct ip6_ra_chain *ra, *new_ra, **rap; | |
67 | ||
68 | /* RA packet may be delivered ONLY to IPPROTO_RAW socket */ | |
69 | if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW) | |
70 | return -EINVAL; | |
71 | ||
72 | new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; | |
73 | ||
74 | write_lock_bh(&ip6_ra_lock); | |
75 | for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) { | |
76 | if (ra->sk == sk) { | |
77 | if (sel>=0) { | |
78 | write_unlock_bh(&ip6_ra_lock); | |
a51482bd | 79 | kfree(new_ra); |
1da177e4 LT |
80 | return -EADDRINUSE; |
81 | } | |
82 | ||
83 | *rap = ra->next; | |
84 | write_unlock_bh(&ip6_ra_lock); | |
85 | ||
86 | if (ra->destructor) | |
87 | ra->destructor(sk); | |
88 | sock_put(sk); | |
89 | kfree(ra); | |
90 | return 0; | |
91 | } | |
92 | } | |
93 | if (new_ra == NULL) { | |
94 | write_unlock_bh(&ip6_ra_lock); | |
95 | return -ENOBUFS; | |
96 | } | |
97 | new_ra->sk = sk; | |
98 | new_ra->sel = sel; | |
99 | new_ra->destructor = destructor; | |
100 | new_ra->next = ra; | |
101 | *rap = new_ra; | |
102 | sock_hold(sk); | |
103 | write_unlock_bh(&ip6_ra_lock); | |
104 | return 0; | |
105 | } | |
106 | ||
e7712f1a YH |
107 | static |
108 | struct ipv6_txoptions *ipv6_update_options(struct sock *sk, | |
109 | struct ipv6_txoptions *opt) | |
110 | { | |
111 | if (inet_sk(sk)->is_icsk) { | |
112 | if (opt && | |
113 | !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && | |
114 | inet_sk(sk)->daddr != LOOPBACK4_IPV6) { | |
115 | struct inet_connection_sock *icsk = inet_csk(sk); | |
116 | icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen; | |
117 | icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); | |
118 | } | |
119 | opt = xchg(&inet6_sk(sk)->opt, opt); | |
120 | } else { | |
121 | write_lock(&sk->sk_dst_lock); | |
122 | opt = xchg(&inet6_sk(sk)->opt, opt); | |
123 | write_unlock(&sk->sk_dst_lock); | |
124 | } | |
125 | sk_dst_reset(sk); | |
126 | ||
127 | return opt; | |
128 | } | |
129 | ||
3fdadf7d | 130 | static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
131 | char __user *optval, int optlen) |
132 | { | |
133 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 134 | struct net *net = sock_net(sk); |
1da177e4 LT |
135 | int val, valbool; |
136 | int retv = -ENOPROTOOPT; | |
137 | ||
1da177e4 LT |
138 | if (optval == NULL) |
139 | val=0; | |
b2a9d7c2 YH |
140 | else { |
141 | if (optlen >= sizeof(int)) { | |
142 | if (get_user(val, (int __user *) optval)) | |
143 | return -EFAULT; | |
144 | } else | |
145 | val = 0; | |
146 | } | |
1da177e4 LT |
147 | |
148 | valbool = (val!=0); | |
149 | ||
7bc570c8 YH |
150 | if (ip6_mroute_opt(optname)) |
151 | return ip6_mroute_setsockopt(sk, optname, optval, optlen); | |
152 | ||
1da177e4 LT |
153 | lock_sock(sk); |
154 | ||
155 | switch (optname) { | |
156 | ||
157 | case IPV6_ADDRFORM: | |
b2a9d7c2 YH |
158 | if (optlen < sizeof(int)) |
159 | goto e_inval; | |
1da177e4 LT |
160 | if (val == PF_INET) { |
161 | struct ipv6_txoptions *opt; | |
162 | struct sk_buff *pktopt; | |
163 | ||
164 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 165 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 LT |
166 | sk->sk_protocol != IPPROTO_TCP) |
167 | break; | |
168 | ||
169 | if (sk->sk_state != TCP_ESTABLISHED) { | |
170 | retv = -ENOTCONN; | |
171 | break; | |
172 | } | |
173 | ||
174 | if (ipv6_only_sock(sk) || | |
e773e4fa | 175 | !ipv6_addr_v4mapped(&np->daddr)) { |
1da177e4 LT |
176 | retv = -EADDRNOTAVAIL; |
177 | break; | |
178 | } | |
179 | ||
180 | fl6_free_socklist(sk); | |
181 | ipv6_sock_mc_close(sk); | |
182 | ||
e6848976 ACM |
183 | /* |
184 | * Sock is moving from IPv6 to IPv4 (sk_prot), so | |
185 | * remove it from the refcnt debug socks count in the | |
186 | * original family... | |
187 | */ | |
188 | sk_refcnt_debug_dec(sk); | |
189 | ||
1da177e4 | 190 | if (sk->sk_protocol == IPPROTO_TCP) { |
d83d8461 | 191 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 | 192 | local_bh_disable(); |
c29a0bc4 PE |
193 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
194 | sock_prot_inuse_add(net, &tcp_prot, 1); | |
1da177e4 LT |
195 | local_bh_enable(); |
196 | sk->sk_prot = &tcp_prot; | |
d83d8461 | 197 | icsk->icsk_af_ops = &ipv4_specific; |
1da177e4 LT |
198 | sk->sk_socket->ops = &inet_stream_ops; |
199 | sk->sk_family = PF_INET; | |
d83d8461 | 200 | tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); |
1da177e4 | 201 | } else { |
ba4e58ec GR |
202 | struct proto *prot = &udp_prot; |
203 | ||
db8dac20 | 204 | if (sk->sk_protocol == IPPROTO_UDPLITE) |
ba4e58ec | 205 | prot = &udplite_prot; |
1da177e4 | 206 | local_bh_disable(); |
c29a0bc4 PE |
207 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
208 | sock_prot_inuse_add(net, prot, 1); | |
1da177e4 | 209 | local_bh_enable(); |
ba4e58ec | 210 | sk->sk_prot = prot; |
1da177e4 LT |
211 | sk->sk_socket->ops = &inet_dgram_ops; |
212 | sk->sk_family = PF_INET; | |
213 | } | |
214 | opt = xchg(&np->opt, NULL); | |
215 | if (opt) | |
216 | sock_kfree_s(sk, opt, opt->tot_len); | |
217 | pktopt = xchg(&np->pktoptions, NULL); | |
218 | if (pktopt) | |
219 | kfree_skb(pktopt); | |
220 | ||
221 | sk->sk_destruct = inet_sock_destruct; | |
e6848976 ACM |
222 | /* |
223 | * ... and add it to the refcnt debug socks count | |
224 | * in the new family. -acme | |
225 | */ | |
226 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
227 | module_put(THIS_MODULE); |
228 | retv = 0; | |
229 | break; | |
230 | } | |
231 | goto e_inval; | |
232 | ||
233 | case IPV6_V6ONLY: | |
b2a9d7c2 YH |
234 | if (optlen < sizeof(int) || |
235 | inet_sk(sk)->num) | |
1da177e4 LT |
236 | goto e_inval; |
237 | np->ipv6only = valbool; | |
238 | retv = 0; | |
239 | break; | |
240 | ||
333fad53 | 241 | case IPV6_RECVPKTINFO: |
b2a9d7c2 YH |
242 | if (optlen < sizeof(int)) |
243 | goto e_inval; | |
1da177e4 LT |
244 | np->rxopt.bits.rxinfo = valbool; |
245 | retv = 0; | |
246 | break; | |
1ab1457c | 247 | |
333fad53 | 248 | case IPV6_2292PKTINFO: |
b2a9d7c2 YH |
249 | if (optlen < sizeof(int)) |
250 | goto e_inval; | |
333fad53 YH |
251 | np->rxopt.bits.rxoinfo = valbool; |
252 | retv = 0; | |
253 | break; | |
1da177e4 | 254 | |
333fad53 | 255 | case IPV6_RECVHOPLIMIT: |
b2a9d7c2 YH |
256 | if (optlen < sizeof(int)) |
257 | goto e_inval; | |
1da177e4 LT |
258 | np->rxopt.bits.rxhlim = valbool; |
259 | retv = 0; | |
260 | break; | |
261 | ||
333fad53 | 262 | case IPV6_2292HOPLIMIT: |
b2a9d7c2 YH |
263 | if (optlen < sizeof(int)) |
264 | goto e_inval; | |
333fad53 YH |
265 | np->rxopt.bits.rxohlim = valbool; |
266 | retv = 0; | |
267 | break; | |
268 | ||
269 | case IPV6_RECVRTHDR: | |
b2a9d7c2 YH |
270 | if (optlen < sizeof(int)) |
271 | goto e_inval; | |
4c752098 | 272 | np->rxopt.bits.srcrt = valbool; |
1da177e4 LT |
273 | retv = 0; |
274 | break; | |
275 | ||
333fad53 | 276 | case IPV6_2292RTHDR: |
b2a9d7c2 YH |
277 | if (optlen < sizeof(int)) |
278 | goto e_inval; | |
4c752098 | 279 | np->rxopt.bits.osrcrt = valbool; |
333fad53 YH |
280 | retv = 0; |
281 | break; | |
282 | ||
283 | case IPV6_RECVHOPOPTS: | |
b2a9d7c2 YH |
284 | if (optlen < sizeof(int)) |
285 | goto e_inval; | |
1da177e4 LT |
286 | np->rxopt.bits.hopopts = valbool; |
287 | retv = 0; | |
288 | break; | |
289 | ||
333fad53 | 290 | case IPV6_2292HOPOPTS: |
b2a9d7c2 YH |
291 | if (optlen < sizeof(int)) |
292 | goto e_inval; | |
333fad53 YH |
293 | np->rxopt.bits.ohopopts = valbool; |
294 | retv = 0; | |
295 | break; | |
296 | ||
297 | case IPV6_RECVDSTOPTS: | |
b2a9d7c2 YH |
298 | if (optlen < sizeof(int)) |
299 | goto e_inval; | |
1da177e4 LT |
300 | np->rxopt.bits.dstopts = valbool; |
301 | retv = 0; | |
302 | break; | |
303 | ||
333fad53 | 304 | case IPV6_2292DSTOPTS: |
b2a9d7c2 YH |
305 | if (optlen < sizeof(int)) |
306 | goto e_inval; | |
333fad53 YH |
307 | np->rxopt.bits.odstopts = valbool; |
308 | retv = 0; | |
309 | break; | |
310 | ||
41a1f8ea | 311 | case IPV6_TCLASS: |
b2a9d7c2 YH |
312 | if (optlen < sizeof(int)) |
313 | goto e_inval; | |
d0ee011f | 314 | if (val < -1 || val > 0xff) |
41a1f8ea YH |
315 | goto e_inval; |
316 | np->tclass = val; | |
317 | retv = 0; | |
318 | break; | |
1ab1457c | 319 | |
41a1f8ea | 320 | case IPV6_RECVTCLASS: |
b2a9d7c2 YH |
321 | if (optlen < sizeof(int)) |
322 | goto e_inval; | |
41a1f8ea YH |
323 | np->rxopt.bits.rxtclass = valbool; |
324 | retv = 0; | |
325 | break; | |
326 | ||
1da177e4 | 327 | case IPV6_FLOWINFO: |
b2a9d7c2 YH |
328 | if (optlen < sizeof(int)) |
329 | goto e_inval; | |
1da177e4 LT |
330 | np->rxopt.bits.rxflow = valbool; |
331 | retv = 0; | |
332 | break; | |
333 | ||
333fad53 YH |
334 | case IPV6_HOPOPTS: |
335 | case IPV6_RTHDRDSTOPTS: | |
336 | case IPV6_RTHDR: | |
337 | case IPV6_DSTOPTS: | |
338 | { | |
339 | struct ipv6_txoptions *opt; | |
340 | if (optlen == 0) | |
cb422c46 | 341 | optval = NULL; |
333fad53 YH |
342 | |
343 | /* hop-by-hop / destination options are privileged option */ | |
344 | retv = -EPERM; | |
345 | if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) | |
346 | break; | |
347 | ||
b2a9d7c2 YH |
348 | if (optlen < sizeof(struct ipv6_opt_hdr) || |
349 | optlen & 0x7 || optlen > 8 * 255) | |
350 | goto e_inval; | |
333fad53 YH |
351 | |
352 | opt = ipv6_renew_options(sk, np->opt, optname, | |
353 | (struct ipv6_opt_hdr __user *)optval, | |
354 | optlen); | |
355 | if (IS_ERR(opt)) { | |
356 | retv = PTR_ERR(opt); | |
357 | break; | |
358 | } | |
359 | ||
360 | /* routing header option needs extra check */ | |
dfee0a72 | 361 | if (optname == IPV6_RTHDR && opt && opt->srcrt) { |
333fad53 | 362 | struct ipv6_rt_hdr *rthdr = opt->srcrt; |
280a9d34 | 363 | switch (rthdr->type) { |
59fbb3a6 | 364 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
280a9d34 | 365 | case IPV6_SRCRT_TYPE_2: |
280a9d34 | 366 | break; |
bb4dbf9e | 367 | #endif |
280a9d34 | 368 | default: |
333fad53 | 369 | goto sticky_done; |
280a9d34 MN |
370 | } |
371 | ||
333fad53 YH |
372 | if ((rthdr->hdrlen & 1) || |
373 | (rthdr->hdrlen >> 1) != rthdr->segments_left) | |
374 | goto sticky_done; | |
375 | } | |
376 | ||
377 | retv = 0; | |
e7712f1a | 378 | opt = ipv6_update_options(sk, opt); |
333fad53 YH |
379 | sticky_done: |
380 | if (opt) | |
381 | sock_kfree_s(sk, opt, opt->tot_len); | |
382 | break; | |
383 | } | |
384 | ||
385 | case IPV6_2292PKTOPTIONS: | |
1da177e4 LT |
386 | { |
387 | struct ipv6_txoptions *opt = NULL; | |
388 | struct msghdr msg; | |
389 | struct flowi fl; | |
390 | int junk; | |
391 | ||
392 | fl.fl6_flowlabel = 0; | |
393 | fl.oif = sk->sk_bound_dev_if; | |
394 | ||
395 | if (optlen == 0) | |
396 | goto update; | |
397 | ||
398 | /* 1K is probably excessive | |
399 | * 1K is surely not enough, 2K per standard header is 16K. | |
400 | */ | |
401 | retv = -EINVAL; | |
402 | if (optlen > 64*1024) | |
403 | break; | |
404 | ||
405 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
406 | retv = -ENOBUFS; | |
407 | if (opt == NULL) | |
408 | break; | |
409 | ||
410 | memset(opt, 0, sizeof(*opt)); | |
411 | opt->tot_len = sizeof(*opt) + optlen; | |
412 | retv = -EFAULT; | |
413 | if (copy_from_user(opt+1, optval, optlen)) | |
414 | goto done; | |
415 | ||
416 | msg.msg_controllen = optlen; | |
417 | msg.msg_control = (void*)(opt+1); | |
418 | ||
41a1f8ea | 419 | retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk); |
1da177e4 LT |
420 | if (retv) |
421 | goto done; | |
422 | update: | |
423 | retv = 0; | |
e7712f1a | 424 | opt = ipv6_update_options(sk, opt); |
1da177e4 LT |
425 | done: |
426 | if (opt) | |
427 | sock_kfree_s(sk, opt, opt->tot_len); | |
428 | break; | |
429 | } | |
430 | case IPV6_UNICAST_HOPS: | |
b2a9d7c2 YH |
431 | if (optlen < sizeof(int)) |
432 | goto e_inval; | |
1da177e4 LT |
433 | if (val > 255 || val < -1) |
434 | goto e_inval; | |
435 | np->hop_limit = val; | |
436 | retv = 0; | |
437 | break; | |
438 | ||
439 | case IPV6_MULTICAST_HOPS: | |
440 | if (sk->sk_type == SOCK_STREAM) | |
441 | goto e_inval; | |
b2a9d7c2 YH |
442 | if (optlen < sizeof(int)) |
443 | goto e_inval; | |
1da177e4 LT |
444 | if (val > 255 || val < -1) |
445 | goto e_inval; | |
446 | np->mcast_hops = val; | |
447 | retv = 0; | |
448 | break; | |
449 | ||
450 | case IPV6_MULTICAST_LOOP: | |
b2a9d7c2 YH |
451 | if (optlen < sizeof(int)) |
452 | goto e_inval; | |
1da177e4 LT |
453 | np->mc_loop = valbool; |
454 | retv = 0; | |
455 | break; | |
456 | ||
457 | case IPV6_MULTICAST_IF: | |
458 | if (sk->sk_type == SOCK_STREAM) | |
459 | goto e_inval; | |
b2a9d7c2 YH |
460 | if (optlen < sizeof(int)) |
461 | goto e_inval; | |
1da177e4 | 462 | |
4953f0fc BH |
463 | if (val) { |
464 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) | |
465 | goto e_inval; | |
466 | ||
8a3edd80 | 467 | if (__dev_get_by_index(net, val) == NULL) { |
4953f0fc BH |
468 | retv = -ENODEV; |
469 | break; | |
470 | } | |
1da177e4 LT |
471 | } |
472 | np->mcast_oif = val; | |
473 | retv = 0; | |
474 | break; | |
475 | case IPV6_ADD_MEMBERSHIP: | |
476 | case IPV6_DROP_MEMBERSHIP: | |
477 | { | |
478 | struct ipv6_mreq mreq; | |
479 | ||
a28398ba WC |
480 | if (optlen < sizeof(struct ipv6_mreq)) |
481 | goto e_inval; | |
482 | ||
a96fb49b FL |
483 | retv = -EPROTO; |
484 | if (inet_sk(sk)->is_icsk) | |
485 | break; | |
486 | ||
1da177e4 LT |
487 | retv = -EFAULT; |
488 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
489 | break; | |
490 | ||
491 | if (optname == IPV6_ADD_MEMBERSHIP) | |
492 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
493 | else | |
494 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
495 | break; | |
496 | } | |
497 | case IPV6_JOIN_ANYCAST: | |
498 | case IPV6_LEAVE_ANYCAST: | |
499 | { | |
500 | struct ipv6_mreq mreq; | |
501 | ||
a28398ba | 502 | if (optlen < sizeof(struct ipv6_mreq)) |
1da177e4 LT |
503 | goto e_inval; |
504 | ||
505 | retv = -EFAULT; | |
506 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
507 | break; | |
508 | ||
509 | if (optname == IPV6_JOIN_ANYCAST) | |
510 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
511 | else | |
512 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
513 | break; | |
514 | } | |
515 | case MCAST_JOIN_GROUP: | |
516 | case MCAST_LEAVE_GROUP: | |
517 | { | |
518 | struct group_req greq; | |
519 | struct sockaddr_in6 *psin6; | |
520 | ||
a28398ba WC |
521 | if (optlen < sizeof(struct group_req)) |
522 | goto e_inval; | |
523 | ||
1da177e4 LT |
524 | retv = -EFAULT; |
525 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
526 | break; | |
527 | if (greq.gr_group.ss_family != AF_INET6) { | |
528 | retv = -EADDRNOTAVAIL; | |
529 | break; | |
530 | } | |
531 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
532 | if (optname == MCAST_JOIN_GROUP) | |
533 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, | |
534 | &psin6->sin6_addr); | |
535 | else | |
536 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, | |
537 | &psin6->sin6_addr); | |
538 | break; | |
539 | } | |
540 | case MCAST_JOIN_SOURCE_GROUP: | |
541 | case MCAST_LEAVE_SOURCE_GROUP: | |
542 | case MCAST_BLOCK_SOURCE: | |
543 | case MCAST_UNBLOCK_SOURCE: | |
544 | { | |
545 | struct group_source_req greqs; | |
546 | int omode, add; | |
547 | ||
a28398ba | 548 | if (optlen < sizeof(struct group_source_req)) |
1da177e4 LT |
549 | goto e_inval; |
550 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
551 | retv = -EFAULT; | |
552 | break; | |
553 | } | |
554 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
555 | greqs.gsr_source.ss_family != AF_INET6) { | |
556 | retv = -EADDRNOTAVAIL; | |
557 | break; | |
558 | } | |
559 | if (optname == MCAST_BLOCK_SOURCE) { | |
560 | omode = MCAST_EXCLUDE; | |
561 | add = 1; | |
562 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
563 | omode = MCAST_EXCLUDE; | |
564 | add = 0; | |
565 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
566 | struct sockaddr_in6 *psin6; | |
567 | ||
568 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
569 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, | |
570 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
571 | /* prior join w/ different source is ok */ |
572 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
573 | break; |
574 | omode = MCAST_INCLUDE; | |
575 | add = 1; | |
c9e3e8b6 | 576 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
577 | omode = MCAST_INCLUDE; |
578 | add = 0; | |
579 | } | |
580 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
581 | break; | |
582 | } | |
583 | case MCAST_MSFILTER: | |
584 | { | |
1da177e4 LT |
585 | extern int sysctl_mld_max_msf; |
586 | struct group_filter *gsf; | |
587 | ||
588 | if (optlen < GROUP_FILTER_SIZE(0)) | |
589 | goto e_inval; | |
590 | if (optlen > sysctl_optmem_max) { | |
591 | retv = -ENOBUFS; | |
592 | break; | |
593 | } | |
8b3a7005 | 594 | gsf = kmalloc(optlen,GFP_KERNEL); |
cfcabdcc | 595 | if (!gsf) { |
1da177e4 LT |
596 | retv = -ENOBUFS; |
597 | break; | |
598 | } | |
599 | retv = -EFAULT; | |
600 | if (copy_from_user(gsf, optval, optlen)) { | |
601 | kfree(gsf); | |
602 | break; | |
603 | } | |
604 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
605 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
606 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
607 | kfree(gsf); | |
608 | retv = -ENOBUFS; | |
609 | break; | |
610 | } | |
611 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
612 | kfree(gsf); | |
613 | retv = -EINVAL; | |
614 | break; | |
615 | } | |
616 | retv = ip6_mc_msfilter(sk, gsf); | |
617 | kfree(gsf); | |
618 | ||
619 | break; | |
620 | } | |
621 | case IPV6_ROUTER_ALERT: | |
b2a9d7c2 YH |
622 | if (optlen < sizeof(int)) |
623 | goto e_inval; | |
1da177e4 LT |
624 | retv = ip6_ra_control(sk, val, NULL); |
625 | break; | |
626 | case IPV6_MTU_DISCOVER: | |
b2a9d7c2 YH |
627 | if (optlen < sizeof(int)) |
628 | goto e_inval; | |
628a5c56 | 629 | if (val<0 || val>3) |
1da177e4 LT |
630 | goto e_inval; |
631 | np->pmtudisc = val; | |
632 | retv = 0; | |
633 | break; | |
634 | case IPV6_MTU: | |
b2a9d7c2 YH |
635 | if (optlen < sizeof(int)) |
636 | goto e_inval; | |
1da177e4 LT |
637 | if (val && val < IPV6_MIN_MTU) |
638 | goto e_inval; | |
639 | np->frag_size = val; | |
640 | retv = 0; | |
641 | break; | |
642 | case IPV6_RECVERR: | |
b2a9d7c2 YH |
643 | if (optlen < sizeof(int)) |
644 | goto e_inval; | |
1da177e4 LT |
645 | np->recverr = valbool; |
646 | if (!val) | |
647 | skb_queue_purge(&sk->sk_error_queue); | |
648 | retv = 0; | |
649 | break; | |
650 | case IPV6_FLOWINFO_SEND: | |
b2a9d7c2 YH |
651 | if (optlen < sizeof(int)) |
652 | goto e_inval; | |
1da177e4 LT |
653 | np->sndflow = valbool; |
654 | retv = 0; | |
655 | break; | |
656 | case IPV6_FLOWLABEL_MGR: | |
657 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
658 | break; | |
659 | case IPV6_IPSEC_POLICY: | |
660 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 HX |
661 | retv = -EPERM; |
662 | if (!capable(CAP_NET_ADMIN)) | |
663 | break; | |
1da177e4 LT |
664 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
665 | break; | |
666 | ||
7cbca67c YH |
667 | case IPV6_ADDR_PREFERENCES: |
668 | { | |
669 | unsigned int pref = 0; | |
670 | unsigned int prefmask = ~0; | |
671 | ||
b2a9d7c2 YH |
672 | if (optlen < sizeof(int)) |
673 | goto e_inval; | |
674 | ||
7cbca67c YH |
675 | retv = -EINVAL; |
676 | ||
677 | /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ | |
678 | switch (val & (IPV6_PREFER_SRC_PUBLIC| | |
679 | IPV6_PREFER_SRC_TMP| | |
680 | IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { | |
681 | case IPV6_PREFER_SRC_PUBLIC: | |
682 | pref |= IPV6_PREFER_SRC_PUBLIC; | |
683 | break; | |
684 | case IPV6_PREFER_SRC_TMP: | |
685 | pref |= IPV6_PREFER_SRC_TMP; | |
686 | break; | |
687 | case IPV6_PREFER_SRC_PUBTMP_DEFAULT: | |
688 | break; | |
689 | case 0: | |
690 | goto pref_skip_pubtmp; | |
691 | default: | |
692 | goto e_inval; | |
693 | } | |
694 | ||
695 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| | |
696 | IPV6_PREFER_SRC_TMP); | |
697 | pref_skip_pubtmp: | |
698 | ||
699 | /* check HOME/COA conflicts */ | |
700 | switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { | |
701 | case IPV6_PREFER_SRC_HOME: | |
702 | break; | |
703 | case IPV6_PREFER_SRC_COA: | |
704 | pref |= IPV6_PREFER_SRC_COA; | |
705 | case 0: | |
706 | goto pref_skip_coa; | |
707 | default: | |
708 | goto e_inval; | |
709 | } | |
710 | ||
711 | prefmask &= ~IPV6_PREFER_SRC_COA; | |
712 | pref_skip_coa: | |
713 | ||
714 | /* check CGA/NONCGA conflicts */ | |
715 | switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { | |
716 | case IPV6_PREFER_SRC_CGA: | |
717 | case IPV6_PREFER_SRC_NONCGA: | |
718 | case 0: | |
719 | break; | |
720 | default: | |
721 | goto e_inval; | |
722 | } | |
723 | ||
724 | np->srcprefs = (np->srcprefs & prefmask) | pref; | |
725 | retv = 0; | |
726 | ||
727 | break; | |
728 | } | |
1da177e4 | 729 | } |
7cbca67c | 730 | |
1da177e4 LT |
731 | release_sock(sk); |
732 | ||
1da177e4 LT |
733 | return retv; |
734 | ||
735 | e_inval: | |
736 | release_sock(sk); | |
737 | return -EINVAL; | |
738 | } | |
739 | ||
3fdadf7d DM |
740 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
741 | char __user *optval, int optlen) | |
742 | { | |
743 | int err; | |
744 | ||
745 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
746 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
747 | ||
748 | if (level != SOL_IPV6) | |
749 | return -ENOPROTOOPT; | |
750 | ||
751 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
752 | #ifdef CONFIG_NETFILTER | |
753 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
754 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
755 | optname != IPV6_XFRM_POLICY) { | |
756 | lock_sock(sk); | |
757 | err = nf_setsockopt(sk, PF_INET6, optname, optval, | |
758 | optlen); | |
759 | release_sock(sk); | |
760 | } | |
761 | #endif | |
762 | return err; | |
763 | } | |
764 | ||
7159039a | 765 | EXPORT_SYMBOL(ipv6_setsockopt); |
3fdadf7d DM |
766 | |
767 | #ifdef CONFIG_COMPAT | |
768 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 769 | char __user *optval, int optlen) |
3fdadf7d DM |
770 | { |
771 | int err; | |
772 | ||
773 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
774 | if (udp_prot.compat_setsockopt != NULL) |
775 | return udp_prot.compat_setsockopt(sk, level, optname, | |
776 | optval, optlen); | |
777 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
778 | } |
779 | ||
780 | if (level != SOL_IPV6) | |
781 | return -ENOPROTOOPT; | |
782 | ||
dae50295 DS |
783 | if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) |
784 | return compat_mc_setsockopt(sk, level, optname, optval, optlen, | |
785 | ipv6_setsockopt); | |
786 | ||
3fdadf7d DM |
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 && | |
543d9cfe | 791 | optname != IPV6_XFRM_POLICY) { |
3fdadf7d | 792 | lock_sock(sk); |
543d9cfe ACM |
793 | err = compat_nf_setsockopt(sk, PF_INET6, optname, |
794 | optval, optlen); | |
3fdadf7d DM |
795 | release_sock(sk); |
796 | } | |
797 | #endif | |
798 | return err; | |
799 | } | |
543d9cfe ACM |
800 | |
801 | EXPORT_SYMBOL(compat_ipv6_setsockopt); | |
3fdadf7d DM |
802 | #endif |
803 | ||
28693079 | 804 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, |
4c6510a7 | 805 | int optname, char __user *optval, int len) |
333fad53 | 806 | { |
28693079 DM |
807 | struct ipv6_opt_hdr *hdr; |
808 | ||
4c6510a7 YH |
809 | if (!opt) |
810 | return 0; | |
811 | ||
812 | switch(optname) { | |
813 | case IPV6_HOPOPTS: | |
814 | hdr = opt->hopopt; | |
815 | break; | |
816 | case IPV6_RTHDRDSTOPTS: | |
817 | hdr = opt->dst0opt; | |
818 | break; | |
819 | case IPV6_RTHDR: | |
820 | hdr = (struct ipv6_opt_hdr *)opt->srcrt; | |
821 | break; | |
822 | case IPV6_DSTOPTS: | |
823 | hdr = opt->dst1opt; | |
824 | break; | |
825 | default: | |
826 | return -EINVAL; /* should not happen */ | |
827 | } | |
828 | ||
829 | if (!hdr) | |
333fad53 | 830 | return 0; |
28693079 | 831 | |
d2b02ed9 | 832 | len = min_t(unsigned int, len, ipv6_optlen(hdr)); |
660adc6e | 833 | if (copy_to_user(optval, hdr, len)) |
333fad53 | 834 | return -EFAULT; |
e5268f12 | 835 | return ipv6_optlen(hdr); |
333fad53 YH |
836 | } |
837 | ||
3fdadf7d | 838 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
839 | char __user *optval, int __user *optlen) |
840 | { | |
841 | struct ipv6_pinfo *np = inet6_sk(sk); | |
842 | int len; | |
843 | int val; | |
844 | ||
7bc570c8 YH |
845 | if (ip6_mroute_opt(optname)) |
846 | return ip6_mroute_getsockopt(sk, optname, optval, optlen); | |
847 | ||
1da177e4 LT |
848 | if (get_user(len, optlen)) |
849 | return -EFAULT; | |
850 | switch (optname) { | |
851 | case IPV6_ADDRFORM: | |
852 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 853 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 LT |
854 | sk->sk_protocol != IPPROTO_TCP) |
855 | return -EINVAL; | |
856 | if (sk->sk_state != TCP_ESTABLISHED) | |
857 | return -ENOTCONN; | |
858 | val = sk->sk_family; | |
859 | break; | |
860 | case MCAST_MSFILTER: | |
861 | { | |
862 | struct group_filter gsf; | |
863 | int err; | |
864 | ||
865 | if (len < GROUP_FILTER_SIZE(0)) | |
866 | return -EINVAL; | |
867 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
868 | return -EFAULT; | |
869 | lock_sock(sk); | |
870 | err = ip6_mc_msfget(sk, &gsf, | |
871 | (struct group_filter __user *)optval, optlen); | |
872 | release_sock(sk); | |
873 | return err; | |
874 | } | |
875 | ||
333fad53 | 876 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
877 | { |
878 | struct msghdr msg; | |
879 | struct sk_buff *skb; | |
880 | ||
881 | if (sk->sk_type != SOCK_STREAM) | |
882 | return -ENOPROTOOPT; | |
883 | ||
884 | msg.msg_control = optval; | |
885 | msg.msg_controllen = len; | |
886 | msg.msg_flags = 0; | |
887 | ||
888 | lock_sock(sk); | |
889 | skb = np->pktoptions; | |
890 | if (skb) | |
891 | atomic_inc(&skb->users); | |
892 | release_sock(sk); | |
893 | ||
894 | if (skb) { | |
895 | int err = datagram_recv_ctl(sk, &msg, skb); | |
896 | kfree_skb(skb); | |
897 | if (err) | |
898 | return err; | |
899 | } else { | |
900 | if (np->rxopt.bits.rxinfo) { | |
901 | struct in6_pktinfo src_info; | |
902 | src_info.ipi6_ifindex = np->mcast_oif; | |
903 | ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); | |
904 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); | |
905 | } | |
906 | if (np->rxopt.bits.rxhlim) { | |
907 | int hlim = np->mcast_hops; | |
908 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
909 | } | |
333fad53 YH |
910 | if (np->rxopt.bits.rxoinfo) { |
911 | struct in6_pktinfo src_info; | |
912 | src_info.ipi6_ifindex = np->mcast_oif; | |
913 | ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); | |
914 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); | |
915 | } | |
916 | if (np->rxopt.bits.rxohlim) { | |
917 | int hlim = np->mcast_hops; | |
918 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
919 | } | |
1da177e4 LT |
920 | } |
921 | len -= msg.msg_controllen; | |
922 | return put_user(len, optlen); | |
923 | } | |
924 | case IPV6_MTU: | |
925 | { | |
926 | struct dst_entry *dst; | |
1ab1457c | 927 | val = 0; |
1da177e4 LT |
928 | lock_sock(sk); |
929 | dst = sk_dst_get(sk); | |
930 | if (dst) { | |
931 | val = dst_mtu(dst); | |
932 | dst_release(dst); | |
933 | } | |
934 | release_sock(sk); | |
935 | if (!val) | |
936 | return -ENOTCONN; | |
937 | break; | |
938 | } | |
939 | ||
940 | case IPV6_V6ONLY: | |
941 | val = np->ipv6only; | |
942 | break; | |
943 | ||
333fad53 | 944 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
945 | val = np->rxopt.bits.rxinfo; |
946 | break; | |
947 | ||
333fad53 YH |
948 | case IPV6_2292PKTINFO: |
949 | val = np->rxopt.bits.rxoinfo; | |
950 | break; | |
951 | ||
952 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
953 | val = np->rxopt.bits.rxhlim; |
954 | break; | |
955 | ||
333fad53 YH |
956 | case IPV6_2292HOPLIMIT: |
957 | val = np->rxopt.bits.rxohlim; | |
958 | break; | |
959 | ||
960 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
961 | val = np->rxopt.bits.srcrt; |
962 | break; | |
963 | ||
333fad53 YH |
964 | case IPV6_2292RTHDR: |
965 | val = np->rxopt.bits.osrcrt; | |
966 | break; | |
967 | ||
1da177e4 | 968 | case IPV6_HOPOPTS: |
333fad53 YH |
969 | case IPV6_RTHDRDSTOPTS: |
970 | case IPV6_RTHDR: | |
971 | case IPV6_DSTOPTS: | |
972 | { | |
973 | ||
974 | lock_sock(sk); | |
28693079 | 975 | len = ipv6_getsockopt_sticky(sk, np->opt, |
4c6510a7 | 976 | optname, optval, len); |
333fad53 YH |
977 | release_sock(sk); |
978 | return put_user(len, optlen); | |
979 | } | |
980 | ||
981 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
982 | val = np->rxopt.bits.hopopts; |
983 | break; | |
984 | ||
333fad53 YH |
985 | case IPV6_2292HOPOPTS: |
986 | val = np->rxopt.bits.ohopopts; | |
987 | break; | |
988 | ||
989 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
990 | val = np->rxopt.bits.dstopts; |
991 | break; | |
992 | ||
333fad53 YH |
993 | case IPV6_2292DSTOPTS: |
994 | val = np->rxopt.bits.odstopts; | |
995 | break; | |
996 | ||
41a1f8ea YH |
997 | case IPV6_TCLASS: |
998 | val = np->tclass; | |
d0ee011f RDC |
999 | if (val < 0) |
1000 | val = 0; | |
41a1f8ea YH |
1001 | break; |
1002 | ||
1003 | case IPV6_RECVTCLASS: | |
1004 | val = np->rxopt.bits.rxtclass; | |
1005 | break; | |
1006 | ||
1da177e4 LT |
1007 | case IPV6_FLOWINFO: |
1008 | val = np->rxopt.bits.rxflow; | |
1009 | break; | |
1010 | ||
1011 | case IPV6_UNICAST_HOPS: | |
1da177e4 | 1012 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
1013 | { |
1014 | struct dst_entry *dst; | |
1015 | ||
1016 | if (optname == IPV6_UNICAST_HOPS) | |
1017 | val = np->hop_limit; | |
1018 | else | |
1019 | val = np->mcast_hops; | |
1020 | ||
1021 | dst = sk_dst_get(sk); | |
1022 | if (dst) { | |
1023 | if (val < 0) | |
6b75d090 | 1024 | val = ip6_dst_hoplimit(dst); |
befffe90 BH |
1025 | dst_release(dst); |
1026 | } | |
1027 | if (val < 0) | |
1028 | val = ipv6_devconf.hop_limit; | |
1da177e4 | 1029 | break; |
befffe90 | 1030 | } |
1da177e4 LT |
1031 | |
1032 | case IPV6_MULTICAST_LOOP: | |
1033 | val = np->mc_loop; | |
1034 | break; | |
1035 | ||
1036 | case IPV6_MULTICAST_IF: | |
1037 | val = np->mcast_oif; | |
1038 | break; | |
1039 | ||
1040 | case IPV6_MTU_DISCOVER: | |
1041 | val = np->pmtudisc; | |
1042 | break; | |
1043 | ||
1044 | case IPV6_RECVERR: | |
1045 | val = np->recverr; | |
1046 | break; | |
1047 | ||
1048 | case IPV6_FLOWINFO_SEND: | |
1049 | val = np->sndflow; | |
1050 | break; | |
1051 | ||
7cbca67c YH |
1052 | case IPV6_ADDR_PREFERENCES: |
1053 | val = 0; | |
1054 | ||
1055 | if (np->srcprefs & IPV6_PREFER_SRC_TMP) | |
1056 | val |= IPV6_PREFER_SRC_TMP; | |
1057 | else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) | |
1058 | val |= IPV6_PREFER_SRC_PUBLIC; | |
1059 | else { | |
1060 | /* XXX: should we return system default? */ | |
1061 | val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; | |
1062 | } | |
1063 | ||
1064 | if (np->srcprefs & IPV6_PREFER_SRC_COA) | |
1065 | val |= IPV6_PREFER_SRC_COA; | |
1066 | else | |
1067 | val |= IPV6_PREFER_SRC_HOME; | |
1068 | break; | |
1069 | ||
1da177e4 | 1070 | default: |
cf6fc4a9 | 1071 | return -ENOPROTOOPT; |
1da177e4 LT |
1072 | } |
1073 | len = min_t(unsigned int, sizeof(int), len); | |
1074 | if(put_user(len, optlen)) | |
1075 | return -EFAULT; | |
1076 | if(copy_to_user(optval,&val,len)) | |
1077 | return -EFAULT; | |
1078 | return 0; | |
1079 | } | |
1080 | ||
3fdadf7d DM |
1081 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1082 | char __user *optval, int __user *optlen) | |
1083 | { | |
1084 | int err; | |
1085 | ||
1086 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1087 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1088 | ||
1089 | if(level != SOL_IPV6) | |
1090 | return -ENOPROTOOPT; | |
1091 | ||
42908c69 DS |
1092 | if (optname == MCAST_MSFILTER) |
1093 | return compat_mc_getsockopt(sk, level, optname, optval, optlen, | |
1094 | ipv6_getsockopt); | |
1095 | ||
3fdadf7d DM |
1096 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); |
1097 | #ifdef CONFIG_NETFILTER | |
cf6fc4a9 WY |
1098 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1099 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1100 | int len; |
1101 | ||
1102 | if (get_user(len, optlen)) | |
1103 | return -EFAULT; | |
1104 | ||
1105 | lock_sock(sk); | |
1106 | err = nf_getsockopt(sk, PF_INET6, optname, optval, | |
1107 | &len); | |
1108 | release_sock(sk); | |
1109 | if (err >= 0) | |
1110 | err = put_user(len, optlen); | |
1111 | } | |
1112 | #endif | |
1113 | return err; | |
1114 | } | |
1115 | ||
7159039a YH |
1116 | EXPORT_SYMBOL(ipv6_getsockopt); |
1117 | ||
3fdadf7d DM |
1118 | #ifdef CONFIG_COMPAT |
1119 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1120 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1121 | { |
1122 | int err; | |
1123 | ||
1124 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1125 | if (udp_prot.compat_getsockopt != NULL) |
1126 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1127 | optval, optlen); | |
1128 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1129 | } |
1130 | ||
543d9cfe | 1131 | if (level != SOL_IPV6) |
3fdadf7d DM |
1132 | return -ENOPROTOOPT; |
1133 | ||
1134 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); | |
1135 | #ifdef CONFIG_NETFILTER | |
cf6fc4a9 WY |
1136 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1137 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1138 | int len; |
1139 | ||
1140 | if (get_user(len, optlen)) | |
1141 | return -EFAULT; | |
1142 | ||
1143 | lock_sock(sk); | |
543d9cfe ACM |
1144 | err = compat_nf_getsockopt(sk, PF_INET6, |
1145 | optname, optval, &len); | |
3fdadf7d DM |
1146 | release_sock(sk); |
1147 | if (err >= 0) | |
1148 | err = put_user(len, optlen); | |
1149 | } | |
1150 | #endif | |
1151 | return err; | |
1152 | } | |
543d9cfe ACM |
1153 | |
1154 | EXPORT_SYMBOL(compat_ipv6_getsockopt); | |
3fdadf7d DM |
1155 | #endif |
1156 |