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) | |
1717699c | 70 | return -ENOPROTOOPT; |
1da177e4 LT |
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 | ||
49d074f4 DL |
164 | if (sk->sk_type == SOCK_RAW) |
165 | break; | |
166 | ||
9596cc82 DL |
167 | if (sk->sk_protocol == IPPROTO_UDP || |
168 | sk->sk_protocol == IPPROTO_UDPLITE) { | |
169 | struct udp_sock *up = udp_sk(sk); | |
170 | if (up->pending == AF_INET6) { | |
171 | retv = -EBUSY; | |
172 | break; | |
173 | } | |
174 | } else if (sk->sk_protocol != IPPROTO_TCP) | |
1da177e4 LT |
175 | break; |
176 | ||
177 | if (sk->sk_state != TCP_ESTABLISHED) { | |
178 | retv = -ENOTCONN; | |
179 | break; | |
180 | } | |
181 | ||
182 | if (ipv6_only_sock(sk) || | |
e773e4fa | 183 | !ipv6_addr_v4mapped(&np->daddr)) { |
1da177e4 LT |
184 | retv = -EADDRNOTAVAIL; |
185 | break; | |
186 | } | |
187 | ||
188 | fl6_free_socklist(sk); | |
189 | ipv6_sock_mc_close(sk); | |
190 | ||
e6848976 ACM |
191 | /* |
192 | * Sock is moving from IPv6 to IPv4 (sk_prot), so | |
193 | * remove it from the refcnt debug socks count in the | |
194 | * original family... | |
195 | */ | |
196 | sk_refcnt_debug_dec(sk); | |
197 | ||
1da177e4 | 198 | if (sk->sk_protocol == IPPROTO_TCP) { |
d83d8461 | 199 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 | 200 | local_bh_disable(); |
c29a0bc4 PE |
201 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
202 | sock_prot_inuse_add(net, &tcp_prot, 1); | |
1da177e4 LT |
203 | local_bh_enable(); |
204 | sk->sk_prot = &tcp_prot; | |
d83d8461 | 205 | icsk->icsk_af_ops = &ipv4_specific; |
1da177e4 LT |
206 | sk->sk_socket->ops = &inet_stream_ops; |
207 | sk->sk_family = PF_INET; | |
d83d8461 | 208 | tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); |
1da177e4 | 209 | } else { |
ba4e58ec GR |
210 | struct proto *prot = &udp_prot; |
211 | ||
db8dac20 | 212 | if (sk->sk_protocol == IPPROTO_UDPLITE) |
ba4e58ec | 213 | prot = &udplite_prot; |
1da177e4 | 214 | local_bh_disable(); |
c29a0bc4 PE |
215 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
216 | sock_prot_inuse_add(net, prot, 1); | |
1da177e4 | 217 | local_bh_enable(); |
ba4e58ec | 218 | sk->sk_prot = prot; |
1da177e4 LT |
219 | sk->sk_socket->ops = &inet_dgram_ops; |
220 | sk->sk_family = PF_INET; | |
221 | } | |
222 | opt = xchg(&np->opt, NULL); | |
223 | if (opt) | |
224 | sock_kfree_s(sk, opt, opt->tot_len); | |
225 | pktopt = xchg(&np->pktoptions, NULL); | |
226 | if (pktopt) | |
227 | kfree_skb(pktopt); | |
228 | ||
229 | sk->sk_destruct = inet_sock_destruct; | |
e6848976 ACM |
230 | /* |
231 | * ... and add it to the refcnt debug socks count | |
232 | * in the new family. -acme | |
233 | */ | |
234 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
235 | module_put(THIS_MODULE); |
236 | retv = 0; | |
237 | break; | |
238 | } | |
239 | goto e_inval; | |
240 | ||
241 | case IPV6_V6ONLY: | |
b2a9d7c2 YH |
242 | if (optlen < sizeof(int) || |
243 | inet_sk(sk)->num) | |
1da177e4 LT |
244 | goto e_inval; |
245 | np->ipv6only = valbool; | |
246 | retv = 0; | |
247 | break; | |
248 | ||
333fad53 | 249 | case IPV6_RECVPKTINFO: |
b2a9d7c2 YH |
250 | if (optlen < sizeof(int)) |
251 | goto e_inval; | |
1da177e4 LT |
252 | np->rxopt.bits.rxinfo = valbool; |
253 | retv = 0; | |
254 | break; | |
1ab1457c | 255 | |
333fad53 | 256 | case IPV6_2292PKTINFO: |
b2a9d7c2 YH |
257 | if (optlen < sizeof(int)) |
258 | goto e_inval; | |
333fad53 YH |
259 | np->rxopt.bits.rxoinfo = valbool; |
260 | retv = 0; | |
261 | break; | |
1da177e4 | 262 | |
333fad53 | 263 | case IPV6_RECVHOPLIMIT: |
b2a9d7c2 YH |
264 | if (optlen < sizeof(int)) |
265 | goto e_inval; | |
1da177e4 LT |
266 | np->rxopt.bits.rxhlim = valbool; |
267 | retv = 0; | |
268 | break; | |
269 | ||
333fad53 | 270 | case IPV6_2292HOPLIMIT: |
b2a9d7c2 YH |
271 | if (optlen < sizeof(int)) |
272 | goto e_inval; | |
333fad53 YH |
273 | np->rxopt.bits.rxohlim = valbool; |
274 | retv = 0; | |
275 | break; | |
276 | ||
277 | case IPV6_RECVRTHDR: | |
b2a9d7c2 YH |
278 | if (optlen < sizeof(int)) |
279 | goto e_inval; | |
4c752098 | 280 | np->rxopt.bits.srcrt = valbool; |
1da177e4 LT |
281 | retv = 0; |
282 | break; | |
283 | ||
333fad53 | 284 | case IPV6_2292RTHDR: |
b2a9d7c2 YH |
285 | if (optlen < sizeof(int)) |
286 | goto e_inval; | |
4c752098 | 287 | np->rxopt.bits.osrcrt = valbool; |
333fad53 YH |
288 | retv = 0; |
289 | break; | |
290 | ||
291 | case IPV6_RECVHOPOPTS: | |
b2a9d7c2 YH |
292 | if (optlen < sizeof(int)) |
293 | goto e_inval; | |
1da177e4 LT |
294 | np->rxopt.bits.hopopts = valbool; |
295 | retv = 0; | |
296 | break; | |
297 | ||
333fad53 | 298 | case IPV6_2292HOPOPTS: |
b2a9d7c2 YH |
299 | if (optlen < sizeof(int)) |
300 | goto e_inval; | |
333fad53 YH |
301 | np->rxopt.bits.ohopopts = valbool; |
302 | retv = 0; | |
303 | break; | |
304 | ||
305 | case IPV6_RECVDSTOPTS: | |
b2a9d7c2 YH |
306 | if (optlen < sizeof(int)) |
307 | goto e_inval; | |
1da177e4 LT |
308 | np->rxopt.bits.dstopts = valbool; |
309 | retv = 0; | |
310 | break; | |
311 | ||
333fad53 | 312 | case IPV6_2292DSTOPTS: |
b2a9d7c2 YH |
313 | if (optlen < sizeof(int)) |
314 | goto e_inval; | |
333fad53 YH |
315 | np->rxopt.bits.odstopts = valbool; |
316 | retv = 0; | |
317 | break; | |
318 | ||
41a1f8ea | 319 | case IPV6_TCLASS: |
b2a9d7c2 YH |
320 | if (optlen < sizeof(int)) |
321 | goto e_inval; | |
d0ee011f | 322 | if (val < -1 || val > 0xff) |
41a1f8ea YH |
323 | goto e_inval; |
324 | np->tclass = val; | |
325 | retv = 0; | |
326 | break; | |
1ab1457c | 327 | |
41a1f8ea | 328 | case IPV6_RECVTCLASS: |
b2a9d7c2 YH |
329 | if (optlen < sizeof(int)) |
330 | goto e_inval; | |
41a1f8ea YH |
331 | np->rxopt.bits.rxtclass = valbool; |
332 | retv = 0; | |
333 | break; | |
334 | ||
1da177e4 | 335 | case IPV6_FLOWINFO: |
b2a9d7c2 YH |
336 | if (optlen < sizeof(int)) |
337 | goto e_inval; | |
1da177e4 LT |
338 | np->rxopt.bits.rxflow = valbool; |
339 | retv = 0; | |
340 | break; | |
341 | ||
333fad53 YH |
342 | case IPV6_HOPOPTS: |
343 | case IPV6_RTHDRDSTOPTS: | |
344 | case IPV6_RTHDR: | |
345 | case IPV6_DSTOPTS: | |
346 | { | |
347 | struct ipv6_txoptions *opt; | |
aea7427f SW |
348 | |
349 | /* remove any sticky options header with a zero option | |
350 | * length, per RFC3542. | |
351 | */ | |
333fad53 | 352 | if (optlen == 0) |
cb422c46 | 353 | optval = NULL; |
aea7427f SW |
354 | else if (optlen < sizeof(struct ipv6_opt_hdr) || |
355 | optlen & 0x7 || optlen > 8 * 255) | |
356 | goto e_inval; | |
333fad53 YH |
357 | |
358 | /* hop-by-hop / destination options are privileged option */ | |
359 | retv = -EPERM; | |
360 | if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) | |
361 | break; | |
362 | ||
333fad53 YH |
363 | opt = ipv6_renew_options(sk, np->opt, optname, |
364 | (struct ipv6_opt_hdr __user *)optval, | |
365 | optlen); | |
366 | if (IS_ERR(opt)) { | |
367 | retv = PTR_ERR(opt); | |
368 | break; | |
369 | } | |
370 | ||
371 | /* routing header option needs extra check */ | |
dfee0a72 | 372 | if (optname == IPV6_RTHDR && opt && opt->srcrt) { |
333fad53 | 373 | struct ipv6_rt_hdr *rthdr = opt->srcrt; |
280a9d34 | 374 | switch (rthdr->type) { |
59fbb3a6 | 375 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
280a9d34 | 376 | case IPV6_SRCRT_TYPE_2: |
280a9d34 | 377 | break; |
bb4dbf9e | 378 | #endif |
280a9d34 | 379 | default: |
333fad53 | 380 | goto sticky_done; |
280a9d34 MN |
381 | } |
382 | ||
333fad53 YH |
383 | if ((rthdr->hdrlen & 1) || |
384 | (rthdr->hdrlen >> 1) != rthdr->segments_left) | |
385 | goto sticky_done; | |
386 | } | |
387 | ||
388 | retv = 0; | |
e7712f1a | 389 | opt = ipv6_update_options(sk, opt); |
333fad53 YH |
390 | sticky_done: |
391 | if (opt) | |
392 | sock_kfree_s(sk, opt, opt->tot_len); | |
393 | break; | |
394 | } | |
395 | ||
396 | case IPV6_2292PKTOPTIONS: | |
1da177e4 LT |
397 | { |
398 | struct ipv6_txoptions *opt = NULL; | |
399 | struct msghdr msg; | |
400 | struct flowi fl; | |
401 | int junk; | |
402 | ||
403 | fl.fl6_flowlabel = 0; | |
404 | fl.oif = sk->sk_bound_dev_if; | |
405 | ||
406 | if (optlen == 0) | |
407 | goto update; | |
408 | ||
409 | /* 1K is probably excessive | |
410 | * 1K is surely not enough, 2K per standard header is 16K. | |
411 | */ | |
412 | retv = -EINVAL; | |
413 | if (optlen > 64*1024) | |
414 | break; | |
415 | ||
416 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
417 | retv = -ENOBUFS; | |
418 | if (opt == NULL) | |
419 | break; | |
420 | ||
421 | memset(opt, 0, sizeof(*opt)); | |
422 | opt->tot_len = sizeof(*opt) + optlen; | |
423 | retv = -EFAULT; | |
424 | if (copy_from_user(opt+1, optval, optlen)) | |
425 | goto done; | |
426 | ||
427 | msg.msg_controllen = optlen; | |
428 | msg.msg_control = (void*)(opt+1); | |
429 | ||
91e1908f | 430 | retv = datagram_send_ctl(net, &msg, &fl, opt, &junk, &junk); |
1da177e4 LT |
431 | if (retv) |
432 | goto done; | |
433 | update: | |
434 | retv = 0; | |
e7712f1a | 435 | opt = ipv6_update_options(sk, opt); |
1da177e4 LT |
436 | done: |
437 | if (opt) | |
438 | sock_kfree_s(sk, opt, opt->tot_len); | |
439 | break; | |
440 | } | |
441 | case IPV6_UNICAST_HOPS: | |
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->hop_limit = val; | |
447 | retv = 0; | |
448 | break; | |
449 | ||
450 | case IPV6_MULTICAST_HOPS: | |
451 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 452 | break; |
b2a9d7c2 YH |
453 | if (optlen < sizeof(int)) |
454 | goto e_inval; | |
1da177e4 LT |
455 | if (val > 255 || val < -1) |
456 | goto e_inval; | |
457 | np->mcast_hops = val; | |
458 | retv = 0; | |
459 | break; | |
460 | ||
461 | case IPV6_MULTICAST_LOOP: | |
b2a9d7c2 YH |
462 | if (optlen < sizeof(int)) |
463 | goto e_inval; | |
28d44882 YH |
464 | if (val != valbool) |
465 | goto e_inval; | |
1da177e4 LT |
466 | np->mc_loop = valbool; |
467 | retv = 0; | |
468 | break; | |
469 | ||
470 | case IPV6_MULTICAST_IF: | |
471 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 472 | break; |
b2a9d7c2 YH |
473 | if (optlen < sizeof(int)) |
474 | goto e_inval; | |
1da177e4 | 475 | |
4953f0fc BH |
476 | if (val) { |
477 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) | |
478 | goto e_inval; | |
479 | ||
8a3edd80 | 480 | if (__dev_get_by_index(net, val) == NULL) { |
4953f0fc BH |
481 | retv = -ENODEV; |
482 | break; | |
483 | } | |
1da177e4 LT |
484 | } |
485 | np->mcast_oif = val; | |
486 | retv = 0; | |
487 | break; | |
488 | case IPV6_ADD_MEMBERSHIP: | |
489 | case IPV6_DROP_MEMBERSHIP: | |
490 | { | |
491 | struct ipv6_mreq mreq; | |
492 | ||
a28398ba WC |
493 | if (optlen < sizeof(struct ipv6_mreq)) |
494 | goto e_inval; | |
495 | ||
a96fb49b FL |
496 | retv = -EPROTO; |
497 | if (inet_sk(sk)->is_icsk) | |
498 | break; | |
499 | ||
1da177e4 LT |
500 | retv = -EFAULT; |
501 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
502 | break; | |
503 | ||
504 | if (optname == IPV6_ADD_MEMBERSHIP) | |
505 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
506 | else | |
507 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
508 | break; | |
509 | } | |
510 | case IPV6_JOIN_ANYCAST: | |
511 | case IPV6_LEAVE_ANYCAST: | |
512 | { | |
513 | struct ipv6_mreq mreq; | |
514 | ||
a28398ba | 515 | if (optlen < sizeof(struct ipv6_mreq)) |
1da177e4 LT |
516 | goto e_inval; |
517 | ||
518 | retv = -EFAULT; | |
519 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
520 | break; | |
521 | ||
522 | if (optname == IPV6_JOIN_ANYCAST) | |
523 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
524 | else | |
525 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
526 | break; | |
527 | } | |
528 | case MCAST_JOIN_GROUP: | |
529 | case MCAST_LEAVE_GROUP: | |
530 | { | |
531 | struct group_req greq; | |
532 | struct sockaddr_in6 *psin6; | |
533 | ||
a28398ba WC |
534 | if (optlen < sizeof(struct group_req)) |
535 | goto e_inval; | |
536 | ||
1da177e4 LT |
537 | retv = -EFAULT; |
538 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
539 | break; | |
540 | if (greq.gr_group.ss_family != AF_INET6) { | |
541 | retv = -EADDRNOTAVAIL; | |
542 | break; | |
543 | } | |
544 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
545 | if (optname == MCAST_JOIN_GROUP) | |
546 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, | |
547 | &psin6->sin6_addr); | |
548 | else | |
549 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, | |
550 | &psin6->sin6_addr); | |
551 | break; | |
552 | } | |
553 | case MCAST_JOIN_SOURCE_GROUP: | |
554 | case MCAST_LEAVE_SOURCE_GROUP: | |
555 | case MCAST_BLOCK_SOURCE: | |
556 | case MCAST_UNBLOCK_SOURCE: | |
557 | { | |
558 | struct group_source_req greqs; | |
559 | int omode, add; | |
560 | ||
a28398ba | 561 | if (optlen < sizeof(struct group_source_req)) |
1da177e4 LT |
562 | goto e_inval; |
563 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
564 | retv = -EFAULT; | |
565 | break; | |
566 | } | |
567 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
568 | greqs.gsr_source.ss_family != AF_INET6) { | |
569 | retv = -EADDRNOTAVAIL; | |
570 | break; | |
571 | } | |
572 | if (optname == MCAST_BLOCK_SOURCE) { | |
573 | omode = MCAST_EXCLUDE; | |
574 | add = 1; | |
575 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
576 | omode = MCAST_EXCLUDE; | |
577 | add = 0; | |
578 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
579 | struct sockaddr_in6 *psin6; | |
580 | ||
581 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
582 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, | |
583 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
584 | /* prior join w/ different source is ok */ |
585 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
586 | break; |
587 | omode = MCAST_INCLUDE; | |
588 | add = 1; | |
c9e3e8b6 | 589 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
590 | omode = MCAST_INCLUDE; |
591 | add = 0; | |
592 | } | |
593 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
594 | break; | |
595 | } | |
596 | case MCAST_MSFILTER: | |
597 | { | |
1da177e4 LT |
598 | extern int sysctl_mld_max_msf; |
599 | struct group_filter *gsf; | |
600 | ||
601 | if (optlen < GROUP_FILTER_SIZE(0)) | |
602 | goto e_inval; | |
603 | if (optlen > sysctl_optmem_max) { | |
604 | retv = -ENOBUFS; | |
605 | break; | |
606 | } | |
8b3a7005 | 607 | gsf = kmalloc(optlen,GFP_KERNEL); |
cfcabdcc | 608 | if (!gsf) { |
1da177e4 LT |
609 | retv = -ENOBUFS; |
610 | break; | |
611 | } | |
612 | retv = -EFAULT; | |
613 | if (copy_from_user(gsf, optval, optlen)) { | |
614 | kfree(gsf); | |
615 | break; | |
616 | } | |
617 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
618 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
619 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
620 | kfree(gsf); | |
621 | retv = -ENOBUFS; | |
622 | break; | |
623 | } | |
624 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
625 | kfree(gsf); | |
626 | retv = -EINVAL; | |
627 | break; | |
628 | } | |
629 | retv = ip6_mc_msfilter(sk, gsf); | |
630 | kfree(gsf); | |
631 | ||
632 | break; | |
633 | } | |
634 | case IPV6_ROUTER_ALERT: | |
b2a9d7c2 YH |
635 | if (optlen < sizeof(int)) |
636 | goto e_inval; | |
1da177e4 LT |
637 | retv = ip6_ra_control(sk, val, NULL); |
638 | break; | |
639 | case IPV6_MTU_DISCOVER: | |
b2a9d7c2 YH |
640 | if (optlen < sizeof(int)) |
641 | goto e_inval; | |
628a5c56 | 642 | if (val<0 || val>3) |
1da177e4 LT |
643 | goto e_inval; |
644 | np->pmtudisc = val; | |
645 | retv = 0; | |
646 | break; | |
647 | case IPV6_MTU: | |
b2a9d7c2 YH |
648 | if (optlen < sizeof(int)) |
649 | goto e_inval; | |
1da177e4 LT |
650 | if (val && val < IPV6_MIN_MTU) |
651 | goto e_inval; | |
652 | np->frag_size = val; | |
653 | retv = 0; | |
654 | break; | |
655 | case IPV6_RECVERR: | |
b2a9d7c2 YH |
656 | if (optlen < sizeof(int)) |
657 | goto e_inval; | |
1da177e4 LT |
658 | np->recverr = valbool; |
659 | if (!val) | |
660 | skb_queue_purge(&sk->sk_error_queue); | |
661 | retv = 0; | |
662 | break; | |
663 | case IPV6_FLOWINFO_SEND: | |
b2a9d7c2 YH |
664 | if (optlen < sizeof(int)) |
665 | goto e_inval; | |
1da177e4 LT |
666 | np->sndflow = valbool; |
667 | retv = 0; | |
668 | break; | |
669 | case IPV6_FLOWLABEL_MGR: | |
670 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
671 | break; | |
672 | case IPV6_IPSEC_POLICY: | |
673 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 HX |
674 | retv = -EPERM; |
675 | if (!capable(CAP_NET_ADMIN)) | |
676 | break; | |
1da177e4 LT |
677 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
678 | break; | |
679 | ||
7cbca67c YH |
680 | case IPV6_ADDR_PREFERENCES: |
681 | { | |
682 | unsigned int pref = 0; | |
683 | unsigned int prefmask = ~0; | |
684 | ||
b2a9d7c2 YH |
685 | if (optlen < sizeof(int)) |
686 | goto e_inval; | |
687 | ||
7cbca67c YH |
688 | retv = -EINVAL; |
689 | ||
690 | /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ | |
691 | switch (val & (IPV6_PREFER_SRC_PUBLIC| | |
692 | IPV6_PREFER_SRC_TMP| | |
693 | IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { | |
694 | case IPV6_PREFER_SRC_PUBLIC: | |
695 | pref |= IPV6_PREFER_SRC_PUBLIC; | |
696 | break; | |
697 | case IPV6_PREFER_SRC_TMP: | |
698 | pref |= IPV6_PREFER_SRC_TMP; | |
699 | break; | |
700 | case IPV6_PREFER_SRC_PUBTMP_DEFAULT: | |
701 | break; | |
702 | case 0: | |
703 | goto pref_skip_pubtmp; | |
704 | default: | |
705 | goto e_inval; | |
706 | } | |
707 | ||
708 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| | |
709 | IPV6_PREFER_SRC_TMP); | |
710 | pref_skip_pubtmp: | |
711 | ||
712 | /* check HOME/COA conflicts */ | |
713 | switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { | |
714 | case IPV6_PREFER_SRC_HOME: | |
715 | break; | |
716 | case IPV6_PREFER_SRC_COA: | |
717 | pref |= IPV6_PREFER_SRC_COA; | |
718 | case 0: | |
719 | goto pref_skip_coa; | |
720 | default: | |
721 | goto e_inval; | |
722 | } | |
723 | ||
724 | prefmask &= ~IPV6_PREFER_SRC_COA; | |
725 | pref_skip_coa: | |
726 | ||
727 | /* check CGA/NONCGA conflicts */ | |
728 | switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { | |
729 | case IPV6_PREFER_SRC_CGA: | |
730 | case IPV6_PREFER_SRC_NONCGA: | |
731 | case 0: | |
732 | break; | |
733 | default: | |
734 | goto e_inval; | |
735 | } | |
736 | ||
737 | np->srcprefs = (np->srcprefs & prefmask) | pref; | |
738 | retv = 0; | |
739 | ||
740 | break; | |
741 | } | |
1da177e4 | 742 | } |
7cbca67c | 743 | |
1da177e4 LT |
744 | release_sock(sk); |
745 | ||
1da177e4 LT |
746 | return retv; |
747 | ||
748 | e_inval: | |
749 | release_sock(sk); | |
750 | return -EINVAL; | |
751 | } | |
752 | ||
3fdadf7d DM |
753 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
754 | char __user *optval, int optlen) | |
755 | { | |
756 | int err; | |
757 | ||
758 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
759 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
760 | ||
761 | if (level != SOL_IPV6) | |
762 | return -ENOPROTOOPT; | |
763 | ||
764 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
765 | #ifdef CONFIG_NETFILTER | |
766 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
767 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
768 | optname != IPV6_XFRM_POLICY) { | |
769 | lock_sock(sk); | |
770 | err = nf_setsockopt(sk, PF_INET6, optname, optval, | |
771 | optlen); | |
772 | release_sock(sk); | |
773 | } | |
774 | #endif | |
775 | return err; | |
776 | } | |
777 | ||
7159039a | 778 | EXPORT_SYMBOL(ipv6_setsockopt); |
3fdadf7d DM |
779 | |
780 | #ifdef CONFIG_COMPAT | |
781 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 782 | char __user *optval, int optlen) |
3fdadf7d DM |
783 | { |
784 | int err; | |
785 | ||
786 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
787 | if (udp_prot.compat_setsockopt != NULL) |
788 | return udp_prot.compat_setsockopt(sk, level, optname, | |
789 | optval, optlen); | |
790 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
791 | } |
792 | ||
793 | if (level != SOL_IPV6) | |
794 | return -ENOPROTOOPT; | |
795 | ||
dae50295 DS |
796 | if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) |
797 | return compat_mc_setsockopt(sk, level, optname, optval, optlen, | |
798 | ipv6_setsockopt); | |
799 | ||
3fdadf7d DM |
800 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); |
801 | #ifdef CONFIG_NETFILTER | |
802 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
803 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
543d9cfe | 804 | optname != IPV6_XFRM_POLICY) { |
3fdadf7d | 805 | lock_sock(sk); |
543d9cfe ACM |
806 | err = compat_nf_setsockopt(sk, PF_INET6, optname, |
807 | optval, optlen); | |
3fdadf7d DM |
808 | release_sock(sk); |
809 | } | |
810 | #endif | |
811 | return err; | |
812 | } | |
543d9cfe ACM |
813 | |
814 | EXPORT_SYMBOL(compat_ipv6_setsockopt); | |
3fdadf7d DM |
815 | #endif |
816 | ||
28693079 | 817 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, |
4c6510a7 | 818 | int optname, char __user *optval, int len) |
333fad53 | 819 | { |
28693079 DM |
820 | struct ipv6_opt_hdr *hdr; |
821 | ||
4c6510a7 YH |
822 | if (!opt) |
823 | return 0; | |
824 | ||
825 | switch(optname) { | |
826 | case IPV6_HOPOPTS: | |
827 | hdr = opt->hopopt; | |
828 | break; | |
829 | case IPV6_RTHDRDSTOPTS: | |
830 | hdr = opt->dst0opt; | |
831 | break; | |
832 | case IPV6_RTHDR: | |
833 | hdr = (struct ipv6_opt_hdr *)opt->srcrt; | |
834 | break; | |
835 | case IPV6_DSTOPTS: | |
836 | hdr = opt->dst1opt; | |
837 | break; | |
838 | default: | |
839 | return -EINVAL; /* should not happen */ | |
840 | } | |
841 | ||
842 | if (!hdr) | |
333fad53 | 843 | return 0; |
28693079 | 844 | |
d2b02ed9 | 845 | len = min_t(unsigned int, len, ipv6_optlen(hdr)); |
660adc6e | 846 | if (copy_to_user(optval, hdr, len)) |
333fad53 | 847 | return -EFAULT; |
95b496b6 | 848 | return len; |
333fad53 YH |
849 | } |
850 | ||
3fdadf7d | 851 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
852 | char __user *optval, int __user *optlen) |
853 | { | |
854 | struct ipv6_pinfo *np = inet6_sk(sk); | |
855 | int len; | |
856 | int val; | |
857 | ||
7bc570c8 YH |
858 | if (ip6_mroute_opt(optname)) |
859 | return ip6_mroute_getsockopt(sk, optname, optval, optlen); | |
860 | ||
1da177e4 LT |
861 | if (get_user(len, optlen)) |
862 | return -EFAULT; | |
863 | switch (optname) { | |
864 | case IPV6_ADDRFORM: | |
865 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 866 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 | 867 | sk->sk_protocol != IPPROTO_TCP) |
1717699c | 868 | return -ENOPROTOOPT; |
1da177e4 LT |
869 | if (sk->sk_state != TCP_ESTABLISHED) |
870 | return -ENOTCONN; | |
871 | val = sk->sk_family; | |
872 | break; | |
873 | case MCAST_MSFILTER: | |
874 | { | |
875 | struct group_filter gsf; | |
876 | int err; | |
877 | ||
878 | if (len < GROUP_FILTER_SIZE(0)) | |
879 | return -EINVAL; | |
880 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
881 | return -EFAULT; | |
20c61fbd YH |
882 | if (gsf.gf_group.ss_family != AF_INET6) |
883 | return -EADDRNOTAVAIL; | |
1da177e4 LT |
884 | lock_sock(sk); |
885 | err = ip6_mc_msfget(sk, &gsf, | |
886 | (struct group_filter __user *)optval, optlen); | |
887 | release_sock(sk); | |
888 | return err; | |
889 | } | |
890 | ||
333fad53 | 891 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
892 | { |
893 | struct msghdr msg; | |
894 | struct sk_buff *skb; | |
895 | ||
896 | if (sk->sk_type != SOCK_STREAM) | |
897 | return -ENOPROTOOPT; | |
898 | ||
899 | msg.msg_control = optval; | |
900 | msg.msg_controllen = len; | |
901 | msg.msg_flags = 0; | |
902 | ||
903 | lock_sock(sk); | |
904 | skb = np->pktoptions; | |
905 | if (skb) | |
906 | atomic_inc(&skb->users); | |
907 | release_sock(sk); | |
908 | ||
909 | if (skb) { | |
910 | int err = datagram_recv_ctl(sk, &msg, skb); | |
911 | kfree_skb(skb); | |
912 | if (err) | |
913 | return err; | |
914 | } else { | |
915 | if (np->rxopt.bits.rxinfo) { | |
916 | struct in6_pktinfo src_info; | |
917 | src_info.ipi6_ifindex = np->mcast_oif; | |
918 | ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); | |
919 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); | |
920 | } | |
921 | if (np->rxopt.bits.rxhlim) { | |
922 | int hlim = np->mcast_hops; | |
923 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
924 | } | |
333fad53 YH |
925 | if (np->rxopt.bits.rxoinfo) { |
926 | struct in6_pktinfo src_info; | |
927 | src_info.ipi6_ifindex = np->mcast_oif; | |
928 | ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); | |
929 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); | |
930 | } | |
931 | if (np->rxopt.bits.rxohlim) { | |
932 | int hlim = np->mcast_hops; | |
933 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
934 | } | |
1da177e4 LT |
935 | } |
936 | len -= msg.msg_controllen; | |
937 | return put_user(len, optlen); | |
938 | } | |
939 | case IPV6_MTU: | |
940 | { | |
941 | struct dst_entry *dst; | |
1ab1457c | 942 | val = 0; |
1da177e4 LT |
943 | lock_sock(sk); |
944 | dst = sk_dst_get(sk); | |
945 | if (dst) { | |
946 | val = dst_mtu(dst); | |
947 | dst_release(dst); | |
948 | } | |
949 | release_sock(sk); | |
950 | if (!val) | |
951 | return -ENOTCONN; | |
952 | break; | |
953 | } | |
954 | ||
955 | case IPV6_V6ONLY: | |
956 | val = np->ipv6only; | |
957 | break; | |
958 | ||
333fad53 | 959 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
960 | val = np->rxopt.bits.rxinfo; |
961 | break; | |
962 | ||
333fad53 YH |
963 | case IPV6_2292PKTINFO: |
964 | val = np->rxopt.bits.rxoinfo; | |
965 | break; | |
966 | ||
967 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
968 | val = np->rxopt.bits.rxhlim; |
969 | break; | |
970 | ||
333fad53 YH |
971 | case IPV6_2292HOPLIMIT: |
972 | val = np->rxopt.bits.rxohlim; | |
973 | break; | |
974 | ||
975 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
976 | val = np->rxopt.bits.srcrt; |
977 | break; | |
978 | ||
333fad53 YH |
979 | case IPV6_2292RTHDR: |
980 | val = np->rxopt.bits.osrcrt; | |
981 | break; | |
982 | ||
1da177e4 | 983 | case IPV6_HOPOPTS: |
333fad53 YH |
984 | case IPV6_RTHDRDSTOPTS: |
985 | case IPV6_RTHDR: | |
986 | case IPV6_DSTOPTS: | |
987 | { | |
988 | ||
989 | lock_sock(sk); | |
28693079 | 990 | len = ipv6_getsockopt_sticky(sk, np->opt, |
4c6510a7 | 991 | optname, optval, len); |
333fad53 | 992 | release_sock(sk); |
05335c22 YH |
993 | /* check if ipv6_getsockopt_sticky() returns err code */ |
994 | if (len < 0) | |
995 | return len; | |
333fad53 YH |
996 | return put_user(len, optlen); |
997 | } | |
998 | ||
999 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
1000 | val = np->rxopt.bits.hopopts; |
1001 | break; | |
1002 | ||
333fad53 YH |
1003 | case IPV6_2292HOPOPTS: |
1004 | val = np->rxopt.bits.ohopopts; | |
1005 | break; | |
1006 | ||
1007 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
1008 | val = np->rxopt.bits.dstopts; |
1009 | break; | |
1010 | ||
333fad53 YH |
1011 | case IPV6_2292DSTOPTS: |
1012 | val = np->rxopt.bits.odstopts; | |
1013 | break; | |
1014 | ||
41a1f8ea YH |
1015 | case IPV6_TCLASS: |
1016 | val = np->tclass; | |
d0ee011f RDC |
1017 | if (val < 0) |
1018 | val = 0; | |
41a1f8ea YH |
1019 | break; |
1020 | ||
1021 | case IPV6_RECVTCLASS: | |
1022 | val = np->rxopt.bits.rxtclass; | |
1023 | break; | |
1024 | ||
1da177e4 LT |
1025 | case IPV6_FLOWINFO: |
1026 | val = np->rxopt.bits.rxflow; | |
1027 | break; | |
1028 | ||
1029 | case IPV6_UNICAST_HOPS: | |
1da177e4 | 1030 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
1031 | { |
1032 | struct dst_entry *dst; | |
1033 | ||
1034 | if (optname == IPV6_UNICAST_HOPS) | |
1035 | val = np->hop_limit; | |
1036 | else | |
1037 | val = np->mcast_hops; | |
1038 | ||
1039 | dst = sk_dst_get(sk); | |
1040 | if (dst) { | |
1041 | if (val < 0) | |
6b75d090 | 1042 | val = ip6_dst_hoplimit(dst); |
befffe90 BH |
1043 | dst_release(dst); |
1044 | } | |
1045 | if (val < 0) | |
1046 | val = ipv6_devconf.hop_limit; | |
1da177e4 | 1047 | break; |
befffe90 | 1048 | } |
1da177e4 LT |
1049 | |
1050 | case IPV6_MULTICAST_LOOP: | |
1051 | val = np->mc_loop; | |
1052 | break; | |
1053 | ||
1054 | case IPV6_MULTICAST_IF: | |
1055 | val = np->mcast_oif; | |
1056 | break; | |
1057 | ||
1058 | case IPV6_MTU_DISCOVER: | |
1059 | val = np->pmtudisc; | |
1060 | break; | |
1061 | ||
1062 | case IPV6_RECVERR: | |
1063 | val = np->recverr; | |
1064 | break; | |
1065 | ||
1066 | case IPV6_FLOWINFO_SEND: | |
1067 | val = np->sndflow; | |
1068 | break; | |
1069 | ||
7cbca67c YH |
1070 | case IPV6_ADDR_PREFERENCES: |
1071 | val = 0; | |
1072 | ||
1073 | if (np->srcprefs & IPV6_PREFER_SRC_TMP) | |
1074 | val |= IPV6_PREFER_SRC_TMP; | |
1075 | else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) | |
1076 | val |= IPV6_PREFER_SRC_PUBLIC; | |
1077 | else { | |
1078 | /* XXX: should we return system default? */ | |
1079 | val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; | |
1080 | } | |
1081 | ||
1082 | if (np->srcprefs & IPV6_PREFER_SRC_COA) | |
1083 | val |= IPV6_PREFER_SRC_COA; | |
1084 | else | |
1085 | val |= IPV6_PREFER_SRC_HOME; | |
1086 | break; | |
1087 | ||
1da177e4 | 1088 | default: |
cf6fc4a9 | 1089 | return -ENOPROTOOPT; |
1da177e4 LT |
1090 | } |
1091 | len = min_t(unsigned int, sizeof(int), len); | |
1092 | if(put_user(len, optlen)) | |
1093 | return -EFAULT; | |
1094 | if(copy_to_user(optval,&val,len)) | |
1095 | return -EFAULT; | |
1096 | return 0; | |
1097 | } | |
1098 | ||
3fdadf7d DM |
1099 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1100 | char __user *optval, int __user *optlen) | |
1101 | { | |
1102 | int err; | |
1103 | ||
1104 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1105 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1106 | ||
1107 | if(level != SOL_IPV6) | |
1108 | return -ENOPROTOOPT; | |
1109 | ||
1110 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); | |
1111 | #ifdef CONFIG_NETFILTER | |
cf6fc4a9 WY |
1112 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1113 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1114 | int len; |
1115 | ||
1116 | if (get_user(len, optlen)) | |
1117 | return -EFAULT; | |
1118 | ||
1119 | lock_sock(sk); | |
1120 | err = nf_getsockopt(sk, PF_INET6, optname, optval, | |
1121 | &len); | |
1122 | release_sock(sk); | |
1123 | if (err >= 0) | |
1124 | err = put_user(len, optlen); | |
1125 | } | |
1126 | #endif | |
1127 | return err; | |
1128 | } | |
1129 | ||
7159039a YH |
1130 | EXPORT_SYMBOL(ipv6_getsockopt); |
1131 | ||
3fdadf7d DM |
1132 | #ifdef CONFIG_COMPAT |
1133 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1134 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1135 | { |
1136 | int err; | |
1137 | ||
1138 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1139 | if (udp_prot.compat_getsockopt != NULL) |
1140 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1141 | optval, optlen); | |
1142 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1143 | } |
1144 | ||
543d9cfe | 1145 | if (level != SOL_IPV6) |
3fdadf7d DM |
1146 | return -ENOPROTOOPT; |
1147 | ||
80991790 PE |
1148 | if (optname == MCAST_MSFILTER) |
1149 | return compat_mc_getsockopt(sk, level, optname, optval, optlen, | |
1150 | ipv6_getsockopt); | |
1151 | ||
3fdadf7d DM |
1152 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); |
1153 | #ifdef CONFIG_NETFILTER | |
cf6fc4a9 WY |
1154 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1155 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1156 | int len; |
1157 | ||
1158 | if (get_user(len, optlen)) | |
1159 | return -EFAULT; | |
1160 | ||
1161 | lock_sock(sk); | |
543d9cfe ACM |
1162 | err = compat_nf_getsockopt(sk, PF_INET6, |
1163 | optname, optval, &len); | |
3fdadf7d DM |
1164 | release_sock(sk); |
1165 | if (err >= 0) | |
1166 | err = put_user(len, optlen); | |
1167 | } | |
1168 | #endif | |
1169 | return err; | |
1170 | } | |
543d9cfe ACM |
1171 | |
1172 | EXPORT_SYMBOL(compat_ipv6_getsockopt); | |
3fdadf7d DM |
1173 | #endif |
1174 |