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 | * | |
1da177e4 LT |
10 | * This program is free software; you can redistribute it and/or |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | * | |
15 | * FIXME: Make the setsockopt code POSIX compliant: That is | |
16 | * | |
1da177e4 LT |
17 | * o Truncate getsockopt returns |
18 | * o Return an optlen of the truncated length if need be | |
19 | * | |
20 | * Changes: | |
21 | * David L Stevens <dlstevens@us.ibm.com>: | |
22 | * - added multicast source filtering API for MLDv2 | |
23 | */ | |
24 | ||
25 | #include <linux/module.h> | |
4fc268d2 | 26 | #include <linux/capability.h> |
1da177e4 LT |
27 | #include <linux/errno.h> |
28 | #include <linux/types.h> | |
29 | #include <linux/socket.h> | |
30 | #include <linux/sockios.h> | |
1da177e4 LT |
31 | #include <linux/net.h> |
32 | #include <linux/in6.h> | |
7bc570c8 | 33 | #include <linux/mroute6.h> |
1da177e4 LT |
34 | #include <linux/netdevice.h> |
35 | #include <linux/if_arp.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/sysctl.h> | |
38 | #include <linux/netfilter.h> | |
39 | ||
40 | #include <net/sock.h> | |
41 | #include <net/snmp.h> | |
42 | #include <net/ipv6.h> | |
43 | #include <net/ndisc.h> | |
44 | #include <net/protocol.h> | |
45 | #include <net/transp_v6.h> | |
46 | #include <net/ip6_route.h> | |
47 | #include <net/addrconf.h> | |
48 | #include <net/inet_common.h> | |
49 | #include <net/tcp.h> | |
50 | #include <net/udp.h> | |
ba4e58ec | 51 | #include <net/udplite.h> |
1da177e4 | 52 | #include <net/xfrm.h> |
dae50295 | 53 | #include <net/compat.h> |
1da177e4 LT |
54 | |
55 | #include <asm/uaccess.h> | |
56 | ||
ba89966c | 57 | DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly; |
1da177e4 | 58 | |
1da177e4 LT |
59 | struct ip6_ra_chain *ip6_ra_chain; |
60 | DEFINE_RWLOCK(ip6_ra_lock); | |
61 | ||
725a8ff0 | 62 | int ip6_ra_control(struct sock *sk, int sel) |
1da177e4 LT |
63 | { |
64 | struct ip6_ra_chain *ra, *new_ra, **rap; | |
65 | ||
66 | /* RA packet may be delivered ONLY to IPPROTO_RAW socket */ | |
67 | if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW) | |
1717699c | 68 | return -ENOPROTOOPT; |
1da177e4 LT |
69 | |
70 | new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; | |
71 | ||
72 | write_lock_bh(&ip6_ra_lock); | |
73 | for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) { | |
74 | if (ra->sk == sk) { | |
75 | if (sel>=0) { | |
76 | write_unlock_bh(&ip6_ra_lock); | |
a51482bd | 77 | kfree(new_ra); |
1da177e4 LT |
78 | return -EADDRINUSE; |
79 | } | |
80 | ||
81 | *rap = ra->next; | |
82 | write_unlock_bh(&ip6_ra_lock); | |
83 | ||
1da177e4 LT |
84 | sock_put(sk); |
85 | kfree(ra); | |
86 | return 0; | |
87 | } | |
88 | } | |
89 | if (new_ra == NULL) { | |
90 | write_unlock_bh(&ip6_ra_lock); | |
91 | return -ENOBUFS; | |
92 | } | |
93 | new_ra->sk = sk; | |
94 | new_ra->sel = sel; | |
1da177e4 LT |
95 | new_ra->next = ra; |
96 | *rap = new_ra; | |
97 | sock_hold(sk); | |
98 | write_unlock_bh(&ip6_ra_lock); | |
99 | return 0; | |
100 | } | |
101 | ||
e7712f1a YH |
102 | static |
103 | struct ipv6_txoptions *ipv6_update_options(struct sock *sk, | |
104 | struct ipv6_txoptions *opt) | |
105 | { | |
106 | if (inet_sk(sk)->is_icsk) { | |
107 | if (opt && | |
108 | !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && | |
109 | inet_sk(sk)->daddr != LOOPBACK4_IPV6) { | |
110 | struct inet_connection_sock *icsk = inet_csk(sk); | |
111 | icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen; | |
112 | icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); | |
113 | } | |
114 | opt = xchg(&inet6_sk(sk)->opt, opt); | |
115 | } else { | |
116 | write_lock(&sk->sk_dst_lock); | |
117 | opt = xchg(&inet6_sk(sk)->opt, opt); | |
118 | write_unlock(&sk->sk_dst_lock); | |
119 | } | |
120 | sk_dst_reset(sk); | |
121 | ||
122 | return opt; | |
123 | } | |
124 | ||
3fdadf7d | 125 | static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
126 | char __user *optval, int optlen) |
127 | { | |
128 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 129 | struct net *net = sock_net(sk); |
1da177e4 LT |
130 | int val, valbool; |
131 | int retv = -ENOPROTOOPT; | |
132 | ||
1da177e4 LT |
133 | if (optval == NULL) |
134 | val=0; | |
b2a9d7c2 YH |
135 | else { |
136 | if (optlen >= sizeof(int)) { | |
137 | if (get_user(val, (int __user *) optval)) | |
138 | return -EFAULT; | |
139 | } else | |
140 | val = 0; | |
141 | } | |
1da177e4 LT |
142 | |
143 | valbool = (val!=0); | |
144 | ||
7bc570c8 YH |
145 | if (ip6_mroute_opt(optname)) |
146 | return ip6_mroute_setsockopt(sk, optname, optval, optlen); | |
147 | ||
1da177e4 LT |
148 | lock_sock(sk); |
149 | ||
150 | switch (optname) { | |
151 | ||
152 | case IPV6_ADDRFORM: | |
b2a9d7c2 YH |
153 | if (optlen < sizeof(int)) |
154 | goto e_inval; | |
1da177e4 LT |
155 | if (val == PF_INET) { |
156 | struct ipv6_txoptions *opt; | |
157 | struct sk_buff *pktopt; | |
158 | ||
49d074f4 DL |
159 | if (sk->sk_type == SOCK_RAW) |
160 | break; | |
161 | ||
9596cc82 DL |
162 | if (sk->sk_protocol == IPPROTO_UDP || |
163 | sk->sk_protocol == IPPROTO_UDPLITE) { | |
164 | struct udp_sock *up = udp_sk(sk); | |
165 | if (up->pending == AF_INET6) { | |
166 | retv = -EBUSY; | |
167 | break; | |
168 | } | |
169 | } else if (sk->sk_protocol != IPPROTO_TCP) | |
1da177e4 LT |
170 | break; |
171 | ||
172 | if (sk->sk_state != TCP_ESTABLISHED) { | |
173 | retv = -ENOTCONN; | |
174 | break; | |
175 | } | |
176 | ||
177 | if (ipv6_only_sock(sk) || | |
e773e4fa | 178 | !ipv6_addr_v4mapped(&np->daddr)) { |
1da177e4 LT |
179 | retv = -EADDRNOTAVAIL; |
180 | break; | |
181 | } | |
182 | ||
183 | fl6_free_socklist(sk); | |
184 | ipv6_sock_mc_close(sk); | |
185 | ||
e6848976 ACM |
186 | /* |
187 | * Sock is moving from IPv6 to IPv4 (sk_prot), so | |
188 | * remove it from the refcnt debug socks count in the | |
189 | * original family... | |
190 | */ | |
191 | sk_refcnt_debug_dec(sk); | |
192 | ||
1da177e4 | 193 | if (sk->sk_protocol == IPPROTO_TCP) { |
d83d8461 | 194 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 | 195 | local_bh_disable(); |
c29a0bc4 PE |
196 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
197 | sock_prot_inuse_add(net, &tcp_prot, 1); | |
1da177e4 LT |
198 | local_bh_enable(); |
199 | sk->sk_prot = &tcp_prot; | |
d83d8461 | 200 | icsk->icsk_af_ops = &ipv4_specific; |
1da177e4 LT |
201 | sk->sk_socket->ops = &inet_stream_ops; |
202 | sk->sk_family = PF_INET; | |
d83d8461 | 203 | tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); |
1da177e4 | 204 | } else { |
ba4e58ec GR |
205 | struct proto *prot = &udp_prot; |
206 | ||
db8dac20 | 207 | if (sk->sk_protocol == IPPROTO_UDPLITE) |
ba4e58ec | 208 | prot = &udplite_prot; |
1da177e4 | 209 | local_bh_disable(); |
c29a0bc4 PE |
210 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
211 | sock_prot_inuse_add(net, prot, 1); | |
1da177e4 | 212 | local_bh_enable(); |
ba4e58ec | 213 | sk->sk_prot = prot; |
1da177e4 LT |
214 | sk->sk_socket->ops = &inet_dgram_ops; |
215 | sk->sk_family = PF_INET; | |
216 | } | |
217 | opt = xchg(&np->opt, NULL); | |
218 | if (opt) | |
219 | sock_kfree_s(sk, opt, opt->tot_len); | |
220 | pktopt = xchg(&np->pktoptions, NULL); | |
221 | if (pktopt) | |
222 | kfree_skb(pktopt); | |
223 | ||
224 | sk->sk_destruct = inet_sock_destruct; | |
e6848976 ACM |
225 | /* |
226 | * ... and add it to the refcnt debug socks count | |
227 | * in the new family. -acme | |
228 | */ | |
229 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
230 | module_put(THIS_MODULE); |
231 | retv = 0; | |
232 | break; | |
233 | } | |
234 | goto e_inval; | |
235 | ||
236 | case IPV6_V6ONLY: | |
b2a9d7c2 YH |
237 | if (optlen < sizeof(int) || |
238 | inet_sk(sk)->num) | |
1da177e4 LT |
239 | goto e_inval; |
240 | np->ipv6only = valbool; | |
241 | retv = 0; | |
242 | break; | |
243 | ||
333fad53 | 244 | case IPV6_RECVPKTINFO: |
b2a9d7c2 YH |
245 | if (optlen < sizeof(int)) |
246 | goto e_inval; | |
1da177e4 LT |
247 | np->rxopt.bits.rxinfo = valbool; |
248 | retv = 0; | |
249 | break; | |
1ab1457c | 250 | |
333fad53 | 251 | case IPV6_2292PKTINFO: |
b2a9d7c2 YH |
252 | if (optlen < sizeof(int)) |
253 | goto e_inval; | |
333fad53 YH |
254 | np->rxopt.bits.rxoinfo = valbool; |
255 | retv = 0; | |
256 | break; | |
1da177e4 | 257 | |
333fad53 | 258 | case IPV6_RECVHOPLIMIT: |
b2a9d7c2 YH |
259 | if (optlen < sizeof(int)) |
260 | goto e_inval; | |
1da177e4 LT |
261 | np->rxopt.bits.rxhlim = valbool; |
262 | retv = 0; | |
263 | break; | |
264 | ||
333fad53 | 265 | case IPV6_2292HOPLIMIT: |
b2a9d7c2 YH |
266 | if (optlen < sizeof(int)) |
267 | goto e_inval; | |
333fad53 YH |
268 | np->rxopt.bits.rxohlim = valbool; |
269 | retv = 0; | |
270 | break; | |
271 | ||
272 | case IPV6_RECVRTHDR: | |
b2a9d7c2 YH |
273 | if (optlen < sizeof(int)) |
274 | goto e_inval; | |
4c752098 | 275 | np->rxopt.bits.srcrt = valbool; |
1da177e4 LT |
276 | retv = 0; |
277 | break; | |
278 | ||
333fad53 | 279 | case IPV6_2292RTHDR: |
b2a9d7c2 YH |
280 | if (optlen < sizeof(int)) |
281 | goto e_inval; | |
4c752098 | 282 | np->rxopt.bits.osrcrt = valbool; |
333fad53 YH |
283 | retv = 0; |
284 | break; | |
285 | ||
286 | case IPV6_RECVHOPOPTS: | |
b2a9d7c2 YH |
287 | if (optlen < sizeof(int)) |
288 | goto e_inval; | |
1da177e4 LT |
289 | np->rxopt.bits.hopopts = valbool; |
290 | retv = 0; | |
291 | break; | |
292 | ||
333fad53 | 293 | case IPV6_2292HOPOPTS: |
b2a9d7c2 YH |
294 | if (optlen < sizeof(int)) |
295 | goto e_inval; | |
333fad53 YH |
296 | np->rxopt.bits.ohopopts = valbool; |
297 | retv = 0; | |
298 | break; | |
299 | ||
300 | case IPV6_RECVDSTOPTS: | |
b2a9d7c2 YH |
301 | if (optlen < sizeof(int)) |
302 | goto e_inval; | |
1da177e4 LT |
303 | np->rxopt.bits.dstopts = valbool; |
304 | retv = 0; | |
305 | break; | |
306 | ||
333fad53 | 307 | case IPV6_2292DSTOPTS: |
b2a9d7c2 YH |
308 | if (optlen < sizeof(int)) |
309 | goto e_inval; | |
333fad53 YH |
310 | np->rxopt.bits.odstopts = valbool; |
311 | retv = 0; | |
312 | break; | |
313 | ||
41a1f8ea | 314 | case IPV6_TCLASS: |
b2a9d7c2 YH |
315 | if (optlen < sizeof(int)) |
316 | goto e_inval; | |
d0ee011f | 317 | if (val < -1 || val > 0xff) |
41a1f8ea YH |
318 | goto e_inval; |
319 | np->tclass = val; | |
320 | retv = 0; | |
321 | break; | |
1ab1457c | 322 | |
41a1f8ea | 323 | case IPV6_RECVTCLASS: |
b2a9d7c2 YH |
324 | if (optlen < sizeof(int)) |
325 | goto e_inval; | |
41a1f8ea YH |
326 | np->rxopt.bits.rxtclass = valbool; |
327 | retv = 0; | |
328 | break; | |
329 | ||
1da177e4 | 330 | case IPV6_FLOWINFO: |
b2a9d7c2 YH |
331 | if (optlen < sizeof(int)) |
332 | goto e_inval; | |
1da177e4 LT |
333 | np->rxopt.bits.rxflow = valbool; |
334 | retv = 0; | |
335 | break; | |
336 | ||
333fad53 YH |
337 | case IPV6_HOPOPTS: |
338 | case IPV6_RTHDRDSTOPTS: | |
339 | case IPV6_RTHDR: | |
340 | case IPV6_DSTOPTS: | |
341 | { | |
342 | struct ipv6_txoptions *opt; | |
aea7427f SW |
343 | |
344 | /* remove any sticky options header with a zero option | |
345 | * length, per RFC3542. | |
346 | */ | |
333fad53 | 347 | if (optlen == 0) |
cb422c46 | 348 | optval = NULL; |
cfb266c0 YH |
349 | else if (optval == NULL) |
350 | goto e_inval; | |
aea7427f SW |
351 | else if (optlen < sizeof(struct ipv6_opt_hdr) || |
352 | optlen & 0x7 || optlen > 8 * 255) | |
353 | goto e_inval; | |
333fad53 YH |
354 | |
355 | /* hop-by-hop / destination options are privileged option */ | |
356 | retv = -EPERM; | |
357 | if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) | |
358 | break; | |
359 | ||
333fad53 YH |
360 | opt = ipv6_renew_options(sk, np->opt, optname, |
361 | (struct ipv6_opt_hdr __user *)optval, | |
362 | optlen); | |
363 | if (IS_ERR(opt)) { | |
364 | retv = PTR_ERR(opt); | |
365 | break; | |
366 | } | |
367 | ||
368 | /* routing header option needs extra check */ | |
6e093d9d | 369 | retv = -EINVAL; |
dfee0a72 | 370 | if (optname == IPV6_RTHDR && opt && opt->srcrt) { |
333fad53 | 371 | struct ipv6_rt_hdr *rthdr = opt->srcrt; |
280a9d34 | 372 | switch (rthdr->type) { |
59fbb3a6 | 373 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
280a9d34 | 374 | case IPV6_SRCRT_TYPE_2: |
6e093d9d BH |
375 | if (rthdr->hdrlen != 2 || |
376 | rthdr->segments_left != 1) | |
377 | goto sticky_done; | |
378 | ||
280a9d34 | 379 | break; |
bb4dbf9e | 380 | #endif |
280a9d34 | 381 | default: |
333fad53 | 382 | goto sticky_done; |
280a9d34 MN |
383 | } |
384 | ||
333fad53 YH |
385 | if ((rthdr->hdrlen & 1) || |
386 | (rthdr->hdrlen >> 1) != rthdr->segments_left) | |
387 | goto sticky_done; | |
388 | } | |
389 | ||
390 | retv = 0; | |
e7712f1a | 391 | opt = ipv6_update_options(sk, opt); |
333fad53 YH |
392 | sticky_done: |
393 | if (opt) | |
394 | sock_kfree_s(sk, opt, opt->tot_len); | |
395 | break; | |
396 | } | |
397 | ||
398 | case IPV6_2292PKTOPTIONS: | |
1da177e4 LT |
399 | { |
400 | struct ipv6_txoptions *opt = NULL; | |
401 | struct msghdr msg; | |
402 | struct flowi fl; | |
403 | int junk; | |
404 | ||
405 | fl.fl6_flowlabel = 0; | |
406 | fl.oif = sk->sk_bound_dev_if; | |
407 | ||
408 | if (optlen == 0) | |
409 | goto update; | |
410 | ||
411 | /* 1K is probably excessive | |
412 | * 1K is surely not enough, 2K per standard header is 16K. | |
413 | */ | |
414 | retv = -EINVAL; | |
415 | if (optlen > 64*1024) | |
416 | break; | |
417 | ||
418 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
419 | retv = -ENOBUFS; | |
420 | if (opt == NULL) | |
421 | break; | |
422 | ||
423 | memset(opt, 0, sizeof(*opt)); | |
424 | opt->tot_len = sizeof(*opt) + optlen; | |
425 | retv = -EFAULT; | |
426 | if (copy_from_user(opt+1, optval, optlen)) | |
427 | goto done; | |
428 | ||
429 | msg.msg_controllen = optlen; | |
430 | msg.msg_control = (void*)(opt+1); | |
431 | ||
91e1908f | 432 | retv = datagram_send_ctl(net, &msg, &fl, opt, &junk, &junk); |
1da177e4 LT |
433 | if (retv) |
434 | goto done; | |
435 | update: | |
436 | retv = 0; | |
e7712f1a | 437 | opt = ipv6_update_options(sk, opt); |
1da177e4 LT |
438 | done: |
439 | if (opt) | |
440 | sock_kfree_s(sk, opt, opt->tot_len); | |
441 | break; | |
442 | } | |
443 | case IPV6_UNICAST_HOPS: | |
b2a9d7c2 YH |
444 | if (optlen < sizeof(int)) |
445 | goto e_inval; | |
1da177e4 LT |
446 | if (val > 255 || val < -1) |
447 | goto e_inval; | |
448 | np->hop_limit = val; | |
449 | retv = 0; | |
450 | break; | |
451 | ||
452 | case IPV6_MULTICAST_HOPS: | |
453 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 454 | break; |
b2a9d7c2 YH |
455 | if (optlen < sizeof(int)) |
456 | goto e_inval; | |
1da177e4 LT |
457 | if (val > 255 || val < -1) |
458 | goto e_inval; | |
459 | np->mcast_hops = val; | |
460 | retv = 0; | |
461 | break; | |
462 | ||
463 | case IPV6_MULTICAST_LOOP: | |
b2a9d7c2 YH |
464 | if (optlen < sizeof(int)) |
465 | goto e_inval; | |
28d44882 YH |
466 | if (val != valbool) |
467 | goto e_inval; | |
1da177e4 LT |
468 | np->mc_loop = valbool; |
469 | retv = 0; | |
470 | break; | |
471 | ||
472 | case IPV6_MULTICAST_IF: | |
473 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 474 | break; |
b2a9d7c2 YH |
475 | if (optlen < sizeof(int)) |
476 | goto e_inval; | |
1da177e4 | 477 | |
4953f0fc BH |
478 | if (val) { |
479 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) | |
480 | goto e_inval; | |
481 | ||
8a3edd80 | 482 | if (__dev_get_by_index(net, val) == NULL) { |
4953f0fc BH |
483 | retv = -ENODEV; |
484 | break; | |
485 | } | |
1da177e4 LT |
486 | } |
487 | np->mcast_oif = val; | |
488 | retv = 0; | |
489 | break; | |
490 | case IPV6_ADD_MEMBERSHIP: | |
491 | case IPV6_DROP_MEMBERSHIP: | |
492 | { | |
493 | struct ipv6_mreq mreq; | |
494 | ||
a28398ba WC |
495 | if (optlen < sizeof(struct ipv6_mreq)) |
496 | goto e_inval; | |
497 | ||
a96fb49b FL |
498 | retv = -EPROTO; |
499 | if (inet_sk(sk)->is_icsk) | |
500 | break; | |
501 | ||
1da177e4 LT |
502 | retv = -EFAULT; |
503 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
504 | break; | |
505 | ||
506 | if (optname == IPV6_ADD_MEMBERSHIP) | |
507 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
508 | else | |
509 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
510 | break; | |
511 | } | |
512 | case IPV6_JOIN_ANYCAST: | |
513 | case IPV6_LEAVE_ANYCAST: | |
514 | { | |
515 | struct ipv6_mreq mreq; | |
516 | ||
a28398ba | 517 | if (optlen < sizeof(struct ipv6_mreq)) |
1da177e4 LT |
518 | goto e_inval; |
519 | ||
520 | retv = -EFAULT; | |
521 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
522 | break; | |
523 | ||
524 | if (optname == IPV6_JOIN_ANYCAST) | |
525 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
526 | else | |
527 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
528 | break; | |
529 | } | |
530 | case MCAST_JOIN_GROUP: | |
531 | case MCAST_LEAVE_GROUP: | |
532 | { | |
533 | struct group_req greq; | |
534 | struct sockaddr_in6 *psin6; | |
535 | ||
a28398ba WC |
536 | if (optlen < sizeof(struct group_req)) |
537 | goto e_inval; | |
538 | ||
1da177e4 LT |
539 | retv = -EFAULT; |
540 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
541 | break; | |
542 | if (greq.gr_group.ss_family != AF_INET6) { | |
543 | retv = -EADDRNOTAVAIL; | |
544 | break; | |
545 | } | |
546 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
547 | if (optname == MCAST_JOIN_GROUP) | |
548 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, | |
549 | &psin6->sin6_addr); | |
550 | else | |
551 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, | |
552 | &psin6->sin6_addr); | |
553 | break; | |
554 | } | |
555 | case MCAST_JOIN_SOURCE_GROUP: | |
556 | case MCAST_LEAVE_SOURCE_GROUP: | |
557 | case MCAST_BLOCK_SOURCE: | |
558 | case MCAST_UNBLOCK_SOURCE: | |
559 | { | |
560 | struct group_source_req greqs; | |
561 | int omode, add; | |
562 | ||
a28398ba | 563 | if (optlen < sizeof(struct group_source_req)) |
1da177e4 LT |
564 | goto e_inval; |
565 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
566 | retv = -EFAULT; | |
567 | break; | |
568 | } | |
569 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
570 | greqs.gsr_source.ss_family != AF_INET6) { | |
571 | retv = -EADDRNOTAVAIL; | |
572 | break; | |
573 | } | |
574 | if (optname == MCAST_BLOCK_SOURCE) { | |
575 | omode = MCAST_EXCLUDE; | |
576 | add = 1; | |
577 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
578 | omode = MCAST_EXCLUDE; | |
579 | add = 0; | |
580 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
581 | struct sockaddr_in6 *psin6; | |
582 | ||
583 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
584 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, | |
585 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
586 | /* prior join w/ different source is ok */ |
587 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
588 | break; |
589 | omode = MCAST_INCLUDE; | |
590 | add = 1; | |
c9e3e8b6 | 591 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
592 | omode = MCAST_INCLUDE; |
593 | add = 0; | |
594 | } | |
595 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
596 | break; | |
597 | } | |
598 | case MCAST_MSFILTER: | |
599 | { | |
1da177e4 LT |
600 | extern int sysctl_mld_max_msf; |
601 | struct group_filter *gsf; | |
602 | ||
603 | if (optlen < GROUP_FILTER_SIZE(0)) | |
604 | goto e_inval; | |
605 | if (optlen > sysctl_optmem_max) { | |
606 | retv = -ENOBUFS; | |
607 | break; | |
608 | } | |
8b3a7005 | 609 | gsf = kmalloc(optlen,GFP_KERNEL); |
cfcabdcc | 610 | if (!gsf) { |
1da177e4 LT |
611 | retv = -ENOBUFS; |
612 | break; | |
613 | } | |
614 | retv = -EFAULT; | |
615 | if (copy_from_user(gsf, optval, optlen)) { | |
616 | kfree(gsf); | |
617 | break; | |
618 | } | |
619 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
620 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
621 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
622 | kfree(gsf); | |
623 | retv = -ENOBUFS; | |
624 | break; | |
625 | } | |
626 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
627 | kfree(gsf); | |
628 | retv = -EINVAL; | |
629 | break; | |
630 | } | |
631 | retv = ip6_mc_msfilter(sk, gsf); | |
632 | kfree(gsf); | |
633 | ||
634 | break; | |
635 | } | |
636 | case IPV6_ROUTER_ALERT: | |
b2a9d7c2 YH |
637 | if (optlen < sizeof(int)) |
638 | goto e_inval; | |
725a8ff0 | 639 | retv = ip6_ra_control(sk, val); |
1da177e4 LT |
640 | break; |
641 | case IPV6_MTU_DISCOVER: | |
b2a9d7c2 YH |
642 | if (optlen < sizeof(int)) |
643 | goto e_inval; | |
628a5c56 | 644 | if (val<0 || val>3) |
1da177e4 LT |
645 | goto e_inval; |
646 | np->pmtudisc = val; | |
647 | retv = 0; | |
648 | break; | |
649 | case IPV6_MTU: | |
b2a9d7c2 YH |
650 | if (optlen < sizeof(int)) |
651 | goto e_inval; | |
1da177e4 LT |
652 | if (val && val < IPV6_MIN_MTU) |
653 | goto e_inval; | |
654 | np->frag_size = val; | |
655 | retv = 0; | |
656 | break; | |
657 | case IPV6_RECVERR: | |
b2a9d7c2 YH |
658 | if (optlen < sizeof(int)) |
659 | goto e_inval; | |
1da177e4 LT |
660 | np->recverr = valbool; |
661 | if (!val) | |
662 | skb_queue_purge(&sk->sk_error_queue); | |
663 | retv = 0; | |
664 | break; | |
665 | case IPV6_FLOWINFO_SEND: | |
b2a9d7c2 YH |
666 | if (optlen < sizeof(int)) |
667 | goto e_inval; | |
1da177e4 LT |
668 | np->sndflow = valbool; |
669 | retv = 0; | |
670 | break; | |
671 | case IPV6_FLOWLABEL_MGR: | |
672 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
673 | break; | |
674 | case IPV6_IPSEC_POLICY: | |
675 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 HX |
676 | retv = -EPERM; |
677 | if (!capable(CAP_NET_ADMIN)) | |
678 | break; | |
1da177e4 LT |
679 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
680 | break; | |
681 | ||
7cbca67c YH |
682 | case IPV6_ADDR_PREFERENCES: |
683 | { | |
684 | unsigned int pref = 0; | |
685 | unsigned int prefmask = ~0; | |
686 | ||
b2a9d7c2 YH |
687 | if (optlen < sizeof(int)) |
688 | goto e_inval; | |
689 | ||
7cbca67c YH |
690 | retv = -EINVAL; |
691 | ||
692 | /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ | |
693 | switch (val & (IPV6_PREFER_SRC_PUBLIC| | |
694 | IPV6_PREFER_SRC_TMP| | |
695 | IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { | |
696 | case IPV6_PREFER_SRC_PUBLIC: | |
697 | pref |= IPV6_PREFER_SRC_PUBLIC; | |
698 | break; | |
699 | case IPV6_PREFER_SRC_TMP: | |
700 | pref |= IPV6_PREFER_SRC_TMP; | |
701 | break; | |
702 | case IPV6_PREFER_SRC_PUBTMP_DEFAULT: | |
703 | break; | |
704 | case 0: | |
705 | goto pref_skip_pubtmp; | |
706 | default: | |
707 | goto e_inval; | |
708 | } | |
709 | ||
710 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| | |
711 | IPV6_PREFER_SRC_TMP); | |
712 | pref_skip_pubtmp: | |
713 | ||
714 | /* check HOME/COA conflicts */ | |
715 | switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { | |
716 | case IPV6_PREFER_SRC_HOME: | |
717 | break; | |
718 | case IPV6_PREFER_SRC_COA: | |
719 | pref |= IPV6_PREFER_SRC_COA; | |
720 | case 0: | |
721 | goto pref_skip_coa; | |
722 | default: | |
723 | goto e_inval; | |
724 | } | |
725 | ||
726 | prefmask &= ~IPV6_PREFER_SRC_COA; | |
727 | pref_skip_coa: | |
728 | ||
729 | /* check CGA/NONCGA conflicts */ | |
730 | switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { | |
731 | case IPV6_PREFER_SRC_CGA: | |
732 | case IPV6_PREFER_SRC_NONCGA: | |
733 | case 0: | |
734 | break; | |
735 | default: | |
736 | goto e_inval; | |
737 | } | |
738 | ||
739 | np->srcprefs = (np->srcprefs & prefmask) | pref; | |
740 | retv = 0; | |
741 | ||
742 | break; | |
743 | } | |
1da177e4 | 744 | } |
7cbca67c | 745 | |
1da177e4 LT |
746 | release_sock(sk); |
747 | ||
1da177e4 LT |
748 | return retv; |
749 | ||
750 | e_inval: | |
751 | release_sock(sk); | |
752 | return -EINVAL; | |
753 | } | |
754 | ||
3fdadf7d DM |
755 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
756 | char __user *optval, int optlen) | |
757 | { | |
758 | int err; | |
759 | ||
760 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
761 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
762 | ||
763 | if (level != SOL_IPV6) | |
764 | return -ENOPROTOOPT; | |
765 | ||
766 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
767 | #ifdef CONFIG_NETFILTER | |
768 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
769 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
770 | optname != IPV6_XFRM_POLICY) { | |
771 | lock_sock(sk); | |
772 | err = nf_setsockopt(sk, PF_INET6, optname, optval, | |
773 | optlen); | |
774 | release_sock(sk); | |
775 | } | |
776 | #endif | |
777 | return err; | |
778 | } | |
779 | ||
7159039a | 780 | EXPORT_SYMBOL(ipv6_setsockopt); |
3fdadf7d DM |
781 | |
782 | #ifdef CONFIG_COMPAT | |
783 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 784 | char __user *optval, int optlen) |
3fdadf7d DM |
785 | { |
786 | int err; | |
787 | ||
788 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
789 | if (udp_prot.compat_setsockopt != NULL) |
790 | return udp_prot.compat_setsockopt(sk, level, optname, | |
791 | optval, optlen); | |
792 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
793 | } |
794 | ||
795 | if (level != SOL_IPV6) | |
796 | return -ENOPROTOOPT; | |
797 | ||
dae50295 DS |
798 | if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) |
799 | return compat_mc_setsockopt(sk, level, optname, optval, optlen, | |
800 | ipv6_setsockopt); | |
801 | ||
3fdadf7d DM |
802 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); |
803 | #ifdef CONFIG_NETFILTER | |
804 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
805 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
543d9cfe | 806 | optname != IPV6_XFRM_POLICY) { |
3fdadf7d | 807 | lock_sock(sk); |
543d9cfe ACM |
808 | err = compat_nf_setsockopt(sk, PF_INET6, optname, |
809 | optval, optlen); | |
3fdadf7d DM |
810 | release_sock(sk); |
811 | } | |
812 | #endif | |
813 | return err; | |
814 | } | |
543d9cfe ACM |
815 | |
816 | EXPORT_SYMBOL(compat_ipv6_setsockopt); | |
3fdadf7d DM |
817 | #endif |
818 | ||
28693079 | 819 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, |
4c6510a7 | 820 | int optname, char __user *optval, int len) |
333fad53 | 821 | { |
28693079 DM |
822 | struct ipv6_opt_hdr *hdr; |
823 | ||
4c6510a7 YH |
824 | if (!opt) |
825 | return 0; | |
826 | ||
827 | switch(optname) { | |
828 | case IPV6_HOPOPTS: | |
829 | hdr = opt->hopopt; | |
830 | break; | |
831 | case IPV6_RTHDRDSTOPTS: | |
832 | hdr = opt->dst0opt; | |
833 | break; | |
834 | case IPV6_RTHDR: | |
835 | hdr = (struct ipv6_opt_hdr *)opt->srcrt; | |
836 | break; | |
837 | case IPV6_DSTOPTS: | |
838 | hdr = opt->dst1opt; | |
839 | break; | |
840 | default: | |
841 | return -EINVAL; /* should not happen */ | |
842 | } | |
843 | ||
844 | if (!hdr) | |
333fad53 | 845 | return 0; |
28693079 | 846 | |
d2b02ed9 | 847 | len = min_t(unsigned int, len, ipv6_optlen(hdr)); |
660adc6e | 848 | if (copy_to_user(optval, hdr, len)) |
333fad53 | 849 | return -EFAULT; |
95b496b6 | 850 | return len; |
333fad53 YH |
851 | } |
852 | ||
3fdadf7d | 853 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
854 | char __user *optval, int __user *optlen) |
855 | { | |
856 | struct ipv6_pinfo *np = inet6_sk(sk); | |
857 | int len; | |
858 | int val; | |
859 | ||
7bc570c8 YH |
860 | if (ip6_mroute_opt(optname)) |
861 | return ip6_mroute_getsockopt(sk, optname, optval, optlen); | |
862 | ||
1da177e4 LT |
863 | if (get_user(len, optlen)) |
864 | return -EFAULT; | |
865 | switch (optname) { | |
866 | case IPV6_ADDRFORM: | |
867 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 868 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 | 869 | sk->sk_protocol != IPPROTO_TCP) |
1717699c | 870 | return -ENOPROTOOPT; |
1da177e4 LT |
871 | if (sk->sk_state != TCP_ESTABLISHED) |
872 | return -ENOTCONN; | |
873 | val = sk->sk_family; | |
874 | break; | |
875 | case MCAST_MSFILTER: | |
876 | { | |
877 | struct group_filter gsf; | |
878 | int err; | |
879 | ||
880 | if (len < GROUP_FILTER_SIZE(0)) | |
881 | return -EINVAL; | |
882 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
883 | return -EFAULT; | |
20c61fbd YH |
884 | if (gsf.gf_group.ss_family != AF_INET6) |
885 | return -EADDRNOTAVAIL; | |
1da177e4 LT |
886 | lock_sock(sk); |
887 | err = ip6_mc_msfget(sk, &gsf, | |
888 | (struct group_filter __user *)optval, optlen); | |
889 | release_sock(sk); | |
890 | return err; | |
891 | } | |
892 | ||
333fad53 | 893 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
894 | { |
895 | struct msghdr msg; | |
896 | struct sk_buff *skb; | |
897 | ||
898 | if (sk->sk_type != SOCK_STREAM) | |
899 | return -ENOPROTOOPT; | |
900 | ||
901 | msg.msg_control = optval; | |
902 | msg.msg_controllen = len; | |
903 | msg.msg_flags = 0; | |
904 | ||
905 | lock_sock(sk); | |
906 | skb = np->pktoptions; | |
907 | if (skb) | |
908 | atomic_inc(&skb->users); | |
909 | release_sock(sk); | |
910 | ||
911 | if (skb) { | |
912 | int err = datagram_recv_ctl(sk, &msg, skb); | |
913 | kfree_skb(skb); | |
914 | if (err) | |
915 | return err; | |
916 | } else { | |
917 | if (np->rxopt.bits.rxinfo) { | |
918 | struct in6_pktinfo src_info; | |
13601cd8 | 919 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : sk->sk_bound_dev_if; |
1da177e4 LT |
920 | ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); |
921 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); | |
922 | } | |
923 | if (np->rxopt.bits.rxhlim) { | |
924 | int hlim = np->mcast_hops; | |
925 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
926 | } | |
333fad53 YH |
927 | if (np->rxopt.bits.rxoinfo) { |
928 | struct in6_pktinfo src_info; | |
13601cd8 | 929 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : sk->sk_bound_dev_if; |
333fad53 YH |
930 | ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); |
931 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); | |
932 | } | |
933 | if (np->rxopt.bits.rxohlim) { | |
934 | int hlim = np->mcast_hops; | |
935 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
936 | } | |
1da177e4 LT |
937 | } |
938 | len -= msg.msg_controllen; | |
939 | return put_user(len, optlen); | |
940 | } | |
941 | case IPV6_MTU: | |
942 | { | |
943 | struct dst_entry *dst; | |
1ab1457c | 944 | val = 0; |
1da177e4 LT |
945 | lock_sock(sk); |
946 | dst = sk_dst_get(sk); | |
947 | if (dst) { | |
948 | val = dst_mtu(dst); | |
949 | dst_release(dst); | |
950 | } | |
951 | release_sock(sk); | |
952 | if (!val) | |
953 | return -ENOTCONN; | |
954 | break; | |
955 | } | |
956 | ||
957 | case IPV6_V6ONLY: | |
958 | val = np->ipv6only; | |
959 | break; | |
960 | ||
333fad53 | 961 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
962 | val = np->rxopt.bits.rxinfo; |
963 | break; | |
964 | ||
333fad53 YH |
965 | case IPV6_2292PKTINFO: |
966 | val = np->rxopt.bits.rxoinfo; | |
967 | break; | |
968 | ||
969 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
970 | val = np->rxopt.bits.rxhlim; |
971 | break; | |
972 | ||
333fad53 YH |
973 | case IPV6_2292HOPLIMIT: |
974 | val = np->rxopt.bits.rxohlim; | |
975 | break; | |
976 | ||
977 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
978 | val = np->rxopt.bits.srcrt; |
979 | break; | |
980 | ||
333fad53 YH |
981 | case IPV6_2292RTHDR: |
982 | val = np->rxopt.bits.osrcrt; | |
983 | break; | |
984 | ||
1da177e4 | 985 | case IPV6_HOPOPTS: |
333fad53 YH |
986 | case IPV6_RTHDRDSTOPTS: |
987 | case IPV6_RTHDR: | |
988 | case IPV6_DSTOPTS: | |
989 | { | |
990 | ||
991 | lock_sock(sk); | |
28693079 | 992 | len = ipv6_getsockopt_sticky(sk, np->opt, |
4c6510a7 | 993 | optname, optval, len); |
333fad53 | 994 | release_sock(sk); |
05335c22 YH |
995 | /* check if ipv6_getsockopt_sticky() returns err code */ |
996 | if (len < 0) | |
997 | return len; | |
333fad53 YH |
998 | return put_user(len, optlen); |
999 | } | |
1000 | ||
1001 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
1002 | val = np->rxopt.bits.hopopts; |
1003 | break; | |
1004 | ||
333fad53 YH |
1005 | case IPV6_2292HOPOPTS: |
1006 | val = np->rxopt.bits.ohopopts; | |
1007 | break; | |
1008 | ||
1009 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
1010 | val = np->rxopt.bits.dstopts; |
1011 | break; | |
1012 | ||
333fad53 YH |
1013 | case IPV6_2292DSTOPTS: |
1014 | val = np->rxopt.bits.odstopts; | |
1015 | break; | |
1016 | ||
41a1f8ea YH |
1017 | case IPV6_TCLASS: |
1018 | val = np->tclass; | |
d0ee011f RDC |
1019 | if (val < 0) |
1020 | val = 0; | |
41a1f8ea YH |
1021 | break; |
1022 | ||
1023 | case IPV6_RECVTCLASS: | |
1024 | val = np->rxopt.bits.rxtclass; | |
1025 | break; | |
1026 | ||
1da177e4 LT |
1027 | case IPV6_FLOWINFO: |
1028 | val = np->rxopt.bits.rxflow; | |
1029 | break; | |
1030 | ||
1031 | case IPV6_UNICAST_HOPS: | |
1da177e4 | 1032 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
1033 | { |
1034 | struct dst_entry *dst; | |
1035 | ||
1036 | if (optname == IPV6_UNICAST_HOPS) | |
1037 | val = np->hop_limit; | |
1038 | else | |
1039 | val = np->mcast_hops; | |
1040 | ||
1041 | dst = sk_dst_get(sk); | |
1042 | if (dst) { | |
1043 | if (val < 0) | |
6b75d090 | 1044 | val = ip6_dst_hoplimit(dst); |
befffe90 BH |
1045 | dst_release(dst); |
1046 | } | |
1047 | if (val < 0) | |
53b7997f | 1048 | val = sock_net(sk)->ipv6.devconf_all->hop_limit; |
1da177e4 | 1049 | break; |
befffe90 | 1050 | } |
1da177e4 LT |
1051 | |
1052 | case IPV6_MULTICAST_LOOP: | |
1053 | val = np->mc_loop; | |
1054 | break; | |
1055 | ||
1056 | case IPV6_MULTICAST_IF: | |
1057 | val = np->mcast_oif; | |
1058 | break; | |
1059 | ||
1060 | case IPV6_MTU_DISCOVER: | |
1061 | val = np->pmtudisc; | |
1062 | break; | |
1063 | ||
1064 | case IPV6_RECVERR: | |
1065 | val = np->recverr; | |
1066 | break; | |
1067 | ||
1068 | case IPV6_FLOWINFO_SEND: | |
1069 | val = np->sndflow; | |
1070 | break; | |
1071 | ||
7cbca67c YH |
1072 | case IPV6_ADDR_PREFERENCES: |
1073 | val = 0; | |
1074 | ||
1075 | if (np->srcprefs & IPV6_PREFER_SRC_TMP) | |
1076 | val |= IPV6_PREFER_SRC_TMP; | |
1077 | else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) | |
1078 | val |= IPV6_PREFER_SRC_PUBLIC; | |
1079 | else { | |
1080 | /* XXX: should we return system default? */ | |
1081 | val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; | |
1082 | } | |
1083 | ||
1084 | if (np->srcprefs & IPV6_PREFER_SRC_COA) | |
1085 | val |= IPV6_PREFER_SRC_COA; | |
1086 | else | |
1087 | val |= IPV6_PREFER_SRC_HOME; | |
1088 | break; | |
1089 | ||
1da177e4 | 1090 | default: |
cf6fc4a9 | 1091 | return -ENOPROTOOPT; |
1da177e4 LT |
1092 | } |
1093 | len = min_t(unsigned int, sizeof(int), len); | |
1094 | if(put_user(len, optlen)) | |
1095 | return -EFAULT; | |
1096 | if(copy_to_user(optval,&val,len)) | |
1097 | return -EFAULT; | |
1098 | return 0; | |
1099 | } | |
1100 | ||
3fdadf7d DM |
1101 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1102 | char __user *optval, int __user *optlen) | |
1103 | { | |
1104 | int err; | |
1105 | ||
1106 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1107 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1108 | ||
1109 | if(level != SOL_IPV6) | |
1110 | return -ENOPROTOOPT; | |
1111 | ||
1112 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); | |
1113 | #ifdef CONFIG_NETFILTER | |
cf6fc4a9 WY |
1114 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1115 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1116 | int len; |
1117 | ||
1118 | if (get_user(len, optlen)) | |
1119 | return -EFAULT; | |
1120 | ||
1121 | lock_sock(sk); | |
1122 | err = nf_getsockopt(sk, PF_INET6, optname, optval, | |
1123 | &len); | |
1124 | release_sock(sk); | |
1125 | if (err >= 0) | |
1126 | err = put_user(len, optlen); | |
1127 | } | |
1128 | #endif | |
1129 | return err; | |
1130 | } | |
1131 | ||
7159039a YH |
1132 | EXPORT_SYMBOL(ipv6_getsockopt); |
1133 | ||
3fdadf7d DM |
1134 | #ifdef CONFIG_COMPAT |
1135 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1136 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1137 | { |
1138 | int err; | |
1139 | ||
1140 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1141 | if (udp_prot.compat_getsockopt != NULL) |
1142 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1143 | optval, optlen); | |
1144 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1145 | } |
1146 | ||
543d9cfe | 1147 | if (level != SOL_IPV6) |
3fdadf7d DM |
1148 | return -ENOPROTOOPT; |
1149 | ||
80991790 PE |
1150 | if (optname == MCAST_MSFILTER) |
1151 | return compat_mc_getsockopt(sk, level, optname, optval, optlen, | |
1152 | ipv6_getsockopt); | |
1153 | ||
3fdadf7d DM |
1154 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); |
1155 | #ifdef CONFIG_NETFILTER | |
cf6fc4a9 WY |
1156 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1157 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1158 | int len; |
1159 | ||
1160 | if (get_user(len, optlen)) | |
1161 | return -EFAULT; | |
1162 | ||
1163 | lock_sock(sk); | |
543d9cfe ACM |
1164 | err = compat_nf_getsockopt(sk, PF_INET6, |
1165 | optname, optval, &len); | |
3fdadf7d DM |
1166 | release_sock(sk); |
1167 | if (err >= 0) | |
1168 | err = put_user(len, optlen); | |
1169 | } | |
1170 | #endif | |
1171 | return err; | |
1172 | } | |
543d9cfe ACM |
1173 | |
1174 | EXPORT_SYMBOL(compat_ipv6_getsockopt); | |
3fdadf7d DM |
1175 | #endif |
1176 |