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 | ||
62 | int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *)) | |
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) | |
68 | return -EINVAL; | |
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 | ||
84 | if (ra->destructor) | |
85 | ra->destructor(sk); | |
86 | sock_put(sk); | |
87 | kfree(ra); | |
88 | return 0; | |
89 | } | |
90 | } | |
91 | if (new_ra == NULL) { | |
92 | write_unlock_bh(&ip6_ra_lock); | |
93 | return -ENOBUFS; | |
94 | } | |
95 | new_ra->sk = sk; | |
96 | new_ra->sel = sel; | |
97 | new_ra->destructor = destructor; | |
98 | new_ra->next = ra; | |
99 | *rap = new_ra; | |
100 | sock_hold(sk); | |
101 | write_unlock_bh(&ip6_ra_lock); | |
102 | return 0; | |
103 | } | |
104 | ||
e7712f1a YH |
105 | static |
106 | struct ipv6_txoptions *ipv6_update_options(struct sock *sk, | |
107 | struct ipv6_txoptions *opt) | |
108 | { | |
109 | if (inet_sk(sk)->is_icsk) { | |
110 | if (opt && | |
111 | !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && | |
112 | inet_sk(sk)->daddr != LOOPBACK4_IPV6) { | |
113 | struct inet_connection_sock *icsk = inet_csk(sk); | |
114 | icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen; | |
115 | icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); | |
116 | } | |
117 | opt = xchg(&inet6_sk(sk)->opt, opt); | |
118 | } else { | |
119 | write_lock(&sk->sk_dst_lock); | |
120 | opt = xchg(&inet6_sk(sk)->opt, opt); | |
121 | write_unlock(&sk->sk_dst_lock); | |
122 | } | |
123 | sk_dst_reset(sk); | |
124 | ||
125 | return opt; | |
126 | } | |
127 | ||
3fdadf7d | 128 | static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
129 | char __user *optval, int optlen) |
130 | { | |
131 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 132 | struct net *net = sock_net(sk); |
1da177e4 LT |
133 | int val, valbool; |
134 | int retv = -ENOPROTOOPT; | |
135 | ||
1da177e4 LT |
136 | if (optval == NULL) |
137 | val=0; | |
b2a9d7c2 YH |
138 | else { |
139 | if (optlen >= sizeof(int)) { | |
140 | if (get_user(val, (int __user *) optval)) | |
141 | return -EFAULT; | |
142 | } else | |
143 | val = 0; | |
144 | } | |
1da177e4 LT |
145 | |
146 | valbool = (val!=0); | |
147 | ||
7bc570c8 YH |
148 | if (ip6_mroute_opt(optname)) |
149 | return ip6_mroute_setsockopt(sk, optname, optval, optlen); | |
150 | ||
1da177e4 LT |
151 | lock_sock(sk); |
152 | ||
153 | switch (optname) { | |
154 | ||
155 | case IPV6_ADDRFORM: | |
b2a9d7c2 YH |
156 | if (optlen < sizeof(int)) |
157 | goto e_inval; | |
1da177e4 LT |
158 | if (val == PF_INET) { |
159 | struct ipv6_txoptions *opt; | |
160 | struct sk_buff *pktopt; | |
161 | ||
49d074f4 DL |
162 | if (sk->sk_type == SOCK_RAW) |
163 | break; | |
164 | ||
9596cc82 DL |
165 | if (sk->sk_protocol == IPPROTO_UDP || |
166 | sk->sk_protocol == IPPROTO_UDPLITE) { | |
167 | struct udp_sock *up = udp_sk(sk); | |
168 | if (up->pending == AF_INET6) { | |
169 | retv = -EBUSY; | |
170 | break; | |
171 | } | |
172 | } else if (sk->sk_protocol != IPPROTO_TCP) | |
1da177e4 LT |
173 | break; |
174 | ||
175 | if (sk->sk_state != TCP_ESTABLISHED) { | |
176 | retv = -ENOTCONN; | |
177 | break; | |
178 | } | |
179 | ||
180 | if (ipv6_only_sock(sk) || | |
e773e4fa | 181 | !ipv6_addr_v4mapped(&np->daddr)) { |
1da177e4 LT |
182 | retv = -EADDRNOTAVAIL; |
183 | break; | |
184 | } | |
185 | ||
186 | fl6_free_socklist(sk); | |
187 | ipv6_sock_mc_close(sk); | |
188 | ||
e6848976 ACM |
189 | /* |
190 | * Sock is moving from IPv6 to IPv4 (sk_prot), so | |
191 | * remove it from the refcnt debug socks count in the | |
192 | * original family... | |
193 | */ | |
194 | sk_refcnt_debug_dec(sk); | |
195 | ||
1da177e4 | 196 | if (sk->sk_protocol == IPPROTO_TCP) { |
d83d8461 | 197 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 | 198 | local_bh_disable(); |
c29a0bc4 PE |
199 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
200 | sock_prot_inuse_add(net, &tcp_prot, 1); | |
1da177e4 LT |
201 | local_bh_enable(); |
202 | sk->sk_prot = &tcp_prot; | |
d83d8461 | 203 | icsk->icsk_af_ops = &ipv4_specific; |
1da177e4 LT |
204 | sk->sk_socket->ops = &inet_stream_ops; |
205 | sk->sk_family = PF_INET; | |
d83d8461 | 206 | tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); |
1da177e4 | 207 | } else { |
ba4e58ec GR |
208 | struct proto *prot = &udp_prot; |
209 | ||
db8dac20 | 210 | if (sk->sk_protocol == IPPROTO_UDPLITE) |
ba4e58ec | 211 | prot = &udplite_prot; |
1da177e4 | 212 | local_bh_disable(); |
c29a0bc4 PE |
213 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
214 | sock_prot_inuse_add(net, prot, 1); | |
1da177e4 | 215 | local_bh_enable(); |
ba4e58ec | 216 | sk->sk_prot = prot; |
1da177e4 LT |
217 | sk->sk_socket->ops = &inet_dgram_ops; |
218 | sk->sk_family = PF_INET; | |
219 | } | |
220 | opt = xchg(&np->opt, NULL); | |
221 | if (opt) | |
222 | sock_kfree_s(sk, opt, opt->tot_len); | |
223 | pktopt = xchg(&np->pktoptions, NULL); | |
224 | if (pktopt) | |
225 | kfree_skb(pktopt); | |
226 | ||
227 | sk->sk_destruct = inet_sock_destruct; | |
e6848976 ACM |
228 | /* |
229 | * ... and add it to the refcnt debug socks count | |
230 | * in the new family. -acme | |
231 | */ | |
232 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
233 | module_put(THIS_MODULE); |
234 | retv = 0; | |
235 | break; | |
236 | } | |
237 | goto e_inval; | |
238 | ||
239 | case IPV6_V6ONLY: | |
b2a9d7c2 YH |
240 | if (optlen < sizeof(int) || |
241 | inet_sk(sk)->num) | |
1da177e4 LT |
242 | goto e_inval; |
243 | np->ipv6only = valbool; | |
244 | retv = 0; | |
245 | break; | |
246 | ||
333fad53 | 247 | case IPV6_RECVPKTINFO: |
b2a9d7c2 YH |
248 | if (optlen < sizeof(int)) |
249 | goto e_inval; | |
1da177e4 LT |
250 | np->rxopt.bits.rxinfo = valbool; |
251 | retv = 0; | |
252 | break; | |
1ab1457c | 253 | |
333fad53 | 254 | case IPV6_2292PKTINFO: |
b2a9d7c2 YH |
255 | if (optlen < sizeof(int)) |
256 | goto e_inval; | |
333fad53 YH |
257 | np->rxopt.bits.rxoinfo = valbool; |
258 | retv = 0; | |
259 | break; | |
1da177e4 | 260 | |
333fad53 | 261 | case IPV6_RECVHOPLIMIT: |
b2a9d7c2 YH |
262 | if (optlen < sizeof(int)) |
263 | goto e_inval; | |
1da177e4 LT |
264 | np->rxopt.bits.rxhlim = valbool; |
265 | retv = 0; | |
266 | break; | |
267 | ||
333fad53 | 268 | case IPV6_2292HOPLIMIT: |
b2a9d7c2 YH |
269 | if (optlen < sizeof(int)) |
270 | goto e_inval; | |
333fad53 YH |
271 | np->rxopt.bits.rxohlim = valbool; |
272 | retv = 0; | |
273 | break; | |
274 | ||
275 | case IPV6_RECVRTHDR: | |
b2a9d7c2 YH |
276 | if (optlen < sizeof(int)) |
277 | goto e_inval; | |
4c752098 | 278 | np->rxopt.bits.srcrt = valbool; |
1da177e4 LT |
279 | retv = 0; |
280 | break; | |
281 | ||
333fad53 | 282 | case IPV6_2292RTHDR: |
b2a9d7c2 YH |
283 | if (optlen < sizeof(int)) |
284 | goto e_inval; | |
4c752098 | 285 | np->rxopt.bits.osrcrt = valbool; |
333fad53 YH |
286 | retv = 0; |
287 | break; | |
288 | ||
289 | case IPV6_RECVHOPOPTS: | |
b2a9d7c2 YH |
290 | if (optlen < sizeof(int)) |
291 | goto e_inval; | |
1da177e4 LT |
292 | np->rxopt.bits.hopopts = valbool; |
293 | retv = 0; | |
294 | break; | |
295 | ||
333fad53 | 296 | case IPV6_2292HOPOPTS: |
b2a9d7c2 YH |
297 | if (optlen < sizeof(int)) |
298 | goto e_inval; | |
333fad53 YH |
299 | np->rxopt.bits.ohopopts = valbool; |
300 | retv = 0; | |
301 | break; | |
302 | ||
303 | case IPV6_RECVDSTOPTS: | |
b2a9d7c2 YH |
304 | if (optlen < sizeof(int)) |
305 | goto e_inval; | |
1da177e4 LT |
306 | np->rxopt.bits.dstopts = valbool; |
307 | retv = 0; | |
308 | break; | |
309 | ||
333fad53 | 310 | case IPV6_2292DSTOPTS: |
b2a9d7c2 YH |
311 | if (optlen < sizeof(int)) |
312 | goto e_inval; | |
333fad53 YH |
313 | np->rxopt.bits.odstopts = valbool; |
314 | retv = 0; | |
315 | break; | |
316 | ||
41a1f8ea | 317 | case IPV6_TCLASS: |
b2a9d7c2 YH |
318 | if (optlen < sizeof(int)) |
319 | goto e_inval; | |
d0ee011f | 320 | if (val < -1 || val > 0xff) |
41a1f8ea YH |
321 | goto e_inval; |
322 | np->tclass = val; | |
323 | retv = 0; | |
324 | break; | |
1ab1457c | 325 | |
41a1f8ea | 326 | case IPV6_RECVTCLASS: |
b2a9d7c2 YH |
327 | if (optlen < sizeof(int)) |
328 | goto e_inval; | |
41a1f8ea YH |
329 | np->rxopt.bits.rxtclass = valbool; |
330 | retv = 0; | |
331 | break; | |
332 | ||
1da177e4 | 333 | case IPV6_FLOWINFO: |
b2a9d7c2 YH |
334 | if (optlen < sizeof(int)) |
335 | goto e_inval; | |
1da177e4 LT |
336 | np->rxopt.bits.rxflow = valbool; |
337 | retv = 0; | |
338 | break; | |
339 | ||
333fad53 YH |
340 | case IPV6_HOPOPTS: |
341 | case IPV6_RTHDRDSTOPTS: | |
342 | case IPV6_RTHDR: | |
343 | case IPV6_DSTOPTS: | |
344 | { | |
345 | struct ipv6_txoptions *opt; | |
346 | if (optlen == 0) | |
cb422c46 | 347 | optval = NULL; |
333fad53 YH |
348 | |
349 | /* hop-by-hop / destination options are privileged option */ | |
350 | retv = -EPERM; | |
351 | if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) | |
352 | break; | |
353 | ||
b2a9d7c2 YH |
354 | if (optlen < sizeof(struct ipv6_opt_hdr) || |
355 | optlen & 0x7 || optlen > 8 * 255) | |
356 | goto e_inval; | |
333fad53 YH |
357 | |
358 | opt = ipv6_renew_options(sk, np->opt, optname, | |
359 | (struct ipv6_opt_hdr __user *)optval, | |
360 | optlen); | |
361 | if (IS_ERR(opt)) { | |
362 | retv = PTR_ERR(opt); | |
363 | break; | |
364 | } | |
365 | ||
366 | /* routing header option needs extra check */ | |
dfee0a72 | 367 | if (optname == IPV6_RTHDR && opt && opt->srcrt) { |
333fad53 | 368 | struct ipv6_rt_hdr *rthdr = opt->srcrt; |
280a9d34 | 369 | switch (rthdr->type) { |
59fbb3a6 | 370 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
280a9d34 | 371 | case IPV6_SRCRT_TYPE_2: |
280a9d34 | 372 | break; |
bb4dbf9e | 373 | #endif |
280a9d34 | 374 | default: |
333fad53 | 375 | goto sticky_done; |
280a9d34 MN |
376 | } |
377 | ||
333fad53 YH |
378 | if ((rthdr->hdrlen & 1) || |
379 | (rthdr->hdrlen >> 1) != rthdr->segments_left) | |
380 | goto sticky_done; | |
381 | } | |
382 | ||
383 | retv = 0; | |
e7712f1a | 384 | opt = ipv6_update_options(sk, opt); |
333fad53 YH |
385 | sticky_done: |
386 | if (opt) | |
387 | sock_kfree_s(sk, opt, opt->tot_len); | |
388 | break; | |
389 | } | |
390 | ||
391 | case IPV6_2292PKTOPTIONS: | |
1da177e4 LT |
392 | { |
393 | struct ipv6_txoptions *opt = NULL; | |
394 | struct msghdr msg; | |
395 | struct flowi fl; | |
396 | int junk; | |
397 | ||
398 | fl.fl6_flowlabel = 0; | |
399 | fl.oif = sk->sk_bound_dev_if; | |
400 | ||
401 | if (optlen == 0) | |
402 | goto update; | |
403 | ||
404 | /* 1K is probably excessive | |
405 | * 1K is surely not enough, 2K per standard header is 16K. | |
406 | */ | |
407 | retv = -EINVAL; | |
408 | if (optlen > 64*1024) | |
409 | break; | |
410 | ||
411 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
412 | retv = -ENOBUFS; | |
413 | if (opt == NULL) | |
414 | break; | |
415 | ||
416 | memset(opt, 0, sizeof(*opt)); | |
417 | opt->tot_len = sizeof(*opt) + optlen; | |
418 | retv = -EFAULT; | |
419 | if (copy_from_user(opt+1, optval, optlen)) | |
420 | goto done; | |
421 | ||
422 | msg.msg_controllen = optlen; | |
423 | msg.msg_control = (void*)(opt+1); | |
424 | ||
91e1908f | 425 | retv = datagram_send_ctl(net, &msg, &fl, opt, &junk, &junk); |
1da177e4 LT |
426 | if (retv) |
427 | goto done; | |
428 | update: | |
429 | retv = 0; | |
e7712f1a | 430 | opt = ipv6_update_options(sk, opt); |
1da177e4 LT |
431 | done: |
432 | if (opt) | |
433 | sock_kfree_s(sk, opt, opt->tot_len); | |
434 | break; | |
435 | } | |
436 | case IPV6_UNICAST_HOPS: | |
b2a9d7c2 YH |
437 | if (optlen < sizeof(int)) |
438 | goto e_inval; | |
1da177e4 LT |
439 | if (val > 255 || val < -1) |
440 | goto e_inval; | |
441 | np->hop_limit = val; | |
442 | retv = 0; | |
443 | break; | |
444 | ||
445 | case IPV6_MULTICAST_HOPS: | |
446 | if (sk->sk_type == SOCK_STREAM) | |
447 | goto e_inval; | |
b2a9d7c2 YH |
448 | if (optlen < sizeof(int)) |
449 | goto e_inval; | |
1da177e4 LT |
450 | if (val > 255 || val < -1) |
451 | goto e_inval; | |
452 | np->mcast_hops = val; | |
453 | retv = 0; | |
454 | break; | |
455 | ||
456 | case IPV6_MULTICAST_LOOP: | |
b2a9d7c2 YH |
457 | if (optlen < sizeof(int)) |
458 | goto e_inval; | |
1da177e4 LT |
459 | np->mc_loop = valbool; |
460 | retv = 0; | |
461 | break; | |
462 | ||
463 | case IPV6_MULTICAST_IF: | |
464 | if (sk->sk_type == SOCK_STREAM) | |
465 | goto e_inval; | |
b2a9d7c2 YH |
466 | if (optlen < sizeof(int)) |
467 | goto e_inval; | |
1da177e4 | 468 | |
4953f0fc BH |
469 | if (val) { |
470 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) | |
471 | goto e_inval; | |
472 | ||
8a3edd80 | 473 | if (__dev_get_by_index(net, val) == NULL) { |
4953f0fc BH |
474 | retv = -ENODEV; |
475 | break; | |
476 | } | |
1da177e4 LT |
477 | } |
478 | np->mcast_oif = val; | |
479 | retv = 0; | |
480 | break; | |
481 | case IPV6_ADD_MEMBERSHIP: | |
482 | case IPV6_DROP_MEMBERSHIP: | |
483 | { | |
484 | struct ipv6_mreq mreq; | |
485 | ||
a28398ba WC |
486 | if (optlen < sizeof(struct ipv6_mreq)) |
487 | goto e_inval; | |
488 | ||
a96fb49b FL |
489 | retv = -EPROTO; |
490 | if (inet_sk(sk)->is_icsk) | |
491 | break; | |
492 | ||
1da177e4 LT |
493 | retv = -EFAULT; |
494 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
495 | break; | |
496 | ||
497 | if (optname == IPV6_ADD_MEMBERSHIP) | |
498 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
499 | else | |
500 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
501 | break; | |
502 | } | |
503 | case IPV6_JOIN_ANYCAST: | |
504 | case IPV6_LEAVE_ANYCAST: | |
505 | { | |
506 | struct ipv6_mreq mreq; | |
507 | ||
a28398ba | 508 | if (optlen < sizeof(struct ipv6_mreq)) |
1da177e4 LT |
509 | goto e_inval; |
510 | ||
511 | retv = -EFAULT; | |
512 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
513 | break; | |
514 | ||
515 | if (optname == IPV6_JOIN_ANYCAST) | |
516 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
517 | else | |
518 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
519 | break; | |
520 | } | |
521 | case MCAST_JOIN_GROUP: | |
522 | case MCAST_LEAVE_GROUP: | |
523 | { | |
524 | struct group_req greq; | |
525 | struct sockaddr_in6 *psin6; | |
526 | ||
a28398ba WC |
527 | if (optlen < sizeof(struct group_req)) |
528 | goto e_inval; | |
529 | ||
1da177e4 LT |
530 | retv = -EFAULT; |
531 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
532 | break; | |
533 | if (greq.gr_group.ss_family != AF_INET6) { | |
534 | retv = -EADDRNOTAVAIL; | |
535 | break; | |
536 | } | |
537 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
538 | if (optname == MCAST_JOIN_GROUP) | |
539 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, | |
540 | &psin6->sin6_addr); | |
541 | else | |
542 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, | |
543 | &psin6->sin6_addr); | |
544 | break; | |
545 | } | |
546 | case MCAST_JOIN_SOURCE_GROUP: | |
547 | case MCAST_LEAVE_SOURCE_GROUP: | |
548 | case MCAST_BLOCK_SOURCE: | |
549 | case MCAST_UNBLOCK_SOURCE: | |
550 | { | |
551 | struct group_source_req greqs; | |
552 | int omode, add; | |
553 | ||
a28398ba | 554 | if (optlen < sizeof(struct group_source_req)) |
1da177e4 LT |
555 | goto e_inval; |
556 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
557 | retv = -EFAULT; | |
558 | break; | |
559 | } | |
560 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
561 | greqs.gsr_source.ss_family != AF_INET6) { | |
562 | retv = -EADDRNOTAVAIL; | |
563 | break; | |
564 | } | |
565 | if (optname == MCAST_BLOCK_SOURCE) { | |
566 | omode = MCAST_EXCLUDE; | |
567 | add = 1; | |
568 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
569 | omode = MCAST_EXCLUDE; | |
570 | add = 0; | |
571 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
572 | struct sockaddr_in6 *psin6; | |
573 | ||
574 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
575 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, | |
576 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
577 | /* prior join w/ different source is ok */ |
578 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
579 | break; |
580 | omode = MCAST_INCLUDE; | |
581 | add = 1; | |
c9e3e8b6 | 582 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
583 | omode = MCAST_INCLUDE; |
584 | add = 0; | |
585 | } | |
586 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
587 | break; | |
588 | } | |
589 | case MCAST_MSFILTER: | |
590 | { | |
1da177e4 LT |
591 | extern int sysctl_mld_max_msf; |
592 | struct group_filter *gsf; | |
593 | ||
594 | if (optlen < GROUP_FILTER_SIZE(0)) | |
595 | goto e_inval; | |
596 | if (optlen > sysctl_optmem_max) { | |
597 | retv = -ENOBUFS; | |
598 | break; | |
599 | } | |
8b3a7005 | 600 | gsf = kmalloc(optlen,GFP_KERNEL); |
cfcabdcc | 601 | if (!gsf) { |
1da177e4 LT |
602 | retv = -ENOBUFS; |
603 | break; | |
604 | } | |
605 | retv = -EFAULT; | |
606 | if (copy_from_user(gsf, optval, optlen)) { | |
607 | kfree(gsf); | |
608 | break; | |
609 | } | |
610 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
611 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
612 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
613 | kfree(gsf); | |
614 | retv = -ENOBUFS; | |
615 | break; | |
616 | } | |
617 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
618 | kfree(gsf); | |
619 | retv = -EINVAL; | |
620 | break; | |
621 | } | |
622 | retv = ip6_mc_msfilter(sk, gsf); | |
623 | kfree(gsf); | |
624 | ||
625 | break; | |
626 | } | |
627 | case IPV6_ROUTER_ALERT: | |
b2a9d7c2 YH |
628 | if (optlen < sizeof(int)) |
629 | goto e_inval; | |
1da177e4 LT |
630 | retv = ip6_ra_control(sk, val, NULL); |
631 | break; | |
632 | case IPV6_MTU_DISCOVER: | |
b2a9d7c2 YH |
633 | if (optlen < sizeof(int)) |
634 | goto e_inval; | |
628a5c56 | 635 | if (val<0 || val>3) |
1da177e4 LT |
636 | goto e_inval; |
637 | np->pmtudisc = val; | |
638 | retv = 0; | |
639 | break; | |
640 | case IPV6_MTU: | |
b2a9d7c2 YH |
641 | if (optlen < sizeof(int)) |
642 | goto e_inval; | |
1da177e4 LT |
643 | if (val && val < IPV6_MIN_MTU) |
644 | goto e_inval; | |
645 | np->frag_size = val; | |
646 | retv = 0; | |
647 | break; | |
648 | case IPV6_RECVERR: | |
b2a9d7c2 YH |
649 | if (optlen < sizeof(int)) |
650 | goto e_inval; | |
1da177e4 LT |
651 | np->recverr = valbool; |
652 | if (!val) | |
653 | skb_queue_purge(&sk->sk_error_queue); | |
654 | retv = 0; | |
655 | break; | |
656 | case IPV6_FLOWINFO_SEND: | |
b2a9d7c2 YH |
657 | if (optlen < sizeof(int)) |
658 | goto e_inval; | |
1da177e4 LT |
659 | np->sndflow = valbool; |
660 | retv = 0; | |
661 | break; | |
662 | case IPV6_FLOWLABEL_MGR: | |
663 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
664 | break; | |
665 | case IPV6_IPSEC_POLICY: | |
666 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 HX |
667 | retv = -EPERM; |
668 | if (!capable(CAP_NET_ADMIN)) | |
669 | break; | |
1da177e4 LT |
670 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
671 | break; | |
672 | ||
7cbca67c YH |
673 | case IPV6_ADDR_PREFERENCES: |
674 | { | |
675 | unsigned int pref = 0; | |
676 | unsigned int prefmask = ~0; | |
677 | ||
b2a9d7c2 YH |
678 | if (optlen < sizeof(int)) |
679 | goto e_inval; | |
680 | ||
7cbca67c YH |
681 | retv = -EINVAL; |
682 | ||
683 | /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ | |
684 | switch (val & (IPV6_PREFER_SRC_PUBLIC| | |
685 | IPV6_PREFER_SRC_TMP| | |
686 | IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { | |
687 | case IPV6_PREFER_SRC_PUBLIC: | |
688 | pref |= IPV6_PREFER_SRC_PUBLIC; | |
689 | break; | |
690 | case IPV6_PREFER_SRC_TMP: | |
691 | pref |= IPV6_PREFER_SRC_TMP; | |
692 | break; | |
693 | case IPV6_PREFER_SRC_PUBTMP_DEFAULT: | |
694 | break; | |
695 | case 0: | |
696 | goto pref_skip_pubtmp; | |
697 | default: | |
698 | goto e_inval; | |
699 | } | |
700 | ||
701 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| | |
702 | IPV6_PREFER_SRC_TMP); | |
703 | pref_skip_pubtmp: | |
704 | ||
705 | /* check HOME/COA conflicts */ | |
706 | switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { | |
707 | case IPV6_PREFER_SRC_HOME: | |
708 | break; | |
709 | case IPV6_PREFER_SRC_COA: | |
710 | pref |= IPV6_PREFER_SRC_COA; | |
711 | case 0: | |
712 | goto pref_skip_coa; | |
713 | default: | |
714 | goto e_inval; | |
715 | } | |
716 | ||
717 | prefmask &= ~IPV6_PREFER_SRC_COA; | |
718 | pref_skip_coa: | |
719 | ||
720 | /* check CGA/NONCGA conflicts */ | |
721 | switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { | |
722 | case IPV6_PREFER_SRC_CGA: | |
723 | case IPV6_PREFER_SRC_NONCGA: | |
724 | case 0: | |
725 | break; | |
726 | default: | |
727 | goto e_inval; | |
728 | } | |
729 | ||
730 | np->srcprefs = (np->srcprefs & prefmask) | pref; | |
731 | retv = 0; | |
732 | ||
733 | break; | |
734 | } | |
1da177e4 | 735 | } |
7cbca67c | 736 | |
1da177e4 LT |
737 | release_sock(sk); |
738 | ||
1da177e4 LT |
739 | return retv; |
740 | ||
741 | e_inval: | |
742 | release_sock(sk); | |
743 | return -EINVAL; | |
744 | } | |
745 | ||
3fdadf7d DM |
746 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
747 | char __user *optval, int optlen) | |
748 | { | |
749 | int err; | |
750 | ||
751 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
752 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
753 | ||
754 | if (level != SOL_IPV6) | |
755 | return -ENOPROTOOPT; | |
756 | ||
757 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
758 | #ifdef CONFIG_NETFILTER | |
759 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
760 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
761 | optname != IPV6_XFRM_POLICY) { | |
762 | lock_sock(sk); | |
763 | err = nf_setsockopt(sk, PF_INET6, optname, optval, | |
764 | optlen); | |
765 | release_sock(sk); | |
766 | } | |
767 | #endif | |
768 | return err; | |
769 | } | |
770 | ||
7159039a | 771 | EXPORT_SYMBOL(ipv6_setsockopt); |
3fdadf7d DM |
772 | |
773 | #ifdef CONFIG_COMPAT | |
774 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 775 | char __user *optval, int optlen) |
3fdadf7d DM |
776 | { |
777 | int err; | |
778 | ||
779 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
780 | if (udp_prot.compat_setsockopt != NULL) |
781 | return udp_prot.compat_setsockopt(sk, level, optname, | |
782 | optval, optlen); | |
783 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
784 | } |
785 | ||
786 | if (level != SOL_IPV6) | |
787 | return -ENOPROTOOPT; | |
788 | ||
dae50295 DS |
789 | if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) |
790 | return compat_mc_setsockopt(sk, level, optname, optval, optlen, | |
791 | ipv6_setsockopt); | |
792 | ||
3fdadf7d DM |
793 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); |
794 | #ifdef CONFIG_NETFILTER | |
795 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
796 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
543d9cfe | 797 | optname != IPV6_XFRM_POLICY) { |
3fdadf7d | 798 | lock_sock(sk); |
543d9cfe ACM |
799 | err = compat_nf_setsockopt(sk, PF_INET6, optname, |
800 | optval, optlen); | |
3fdadf7d DM |
801 | release_sock(sk); |
802 | } | |
803 | #endif | |
804 | return err; | |
805 | } | |
543d9cfe ACM |
806 | |
807 | EXPORT_SYMBOL(compat_ipv6_setsockopt); | |
3fdadf7d DM |
808 | #endif |
809 | ||
28693079 | 810 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, |
4c6510a7 | 811 | int optname, char __user *optval, int len) |
333fad53 | 812 | { |
28693079 DM |
813 | struct ipv6_opt_hdr *hdr; |
814 | ||
4c6510a7 YH |
815 | if (!opt) |
816 | return 0; | |
817 | ||
818 | switch(optname) { | |
819 | case IPV6_HOPOPTS: | |
820 | hdr = opt->hopopt; | |
821 | break; | |
822 | case IPV6_RTHDRDSTOPTS: | |
823 | hdr = opt->dst0opt; | |
824 | break; | |
825 | case IPV6_RTHDR: | |
826 | hdr = (struct ipv6_opt_hdr *)opt->srcrt; | |
827 | break; | |
828 | case IPV6_DSTOPTS: | |
829 | hdr = opt->dst1opt; | |
830 | break; | |
831 | default: | |
832 | return -EINVAL; /* should not happen */ | |
833 | } | |
834 | ||
835 | if (!hdr) | |
333fad53 | 836 | return 0; |
28693079 | 837 | |
d2b02ed9 | 838 | len = min_t(unsigned int, len, ipv6_optlen(hdr)); |
660adc6e | 839 | if (copy_to_user(optval, hdr, len)) |
333fad53 | 840 | return -EFAULT; |
95b496b6 | 841 | return len; |
333fad53 YH |
842 | } |
843 | ||
3fdadf7d | 844 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
845 | char __user *optval, int __user *optlen) |
846 | { | |
847 | struct ipv6_pinfo *np = inet6_sk(sk); | |
848 | int len; | |
849 | int val; | |
850 | ||
7bc570c8 YH |
851 | if (ip6_mroute_opt(optname)) |
852 | return ip6_mroute_getsockopt(sk, optname, optval, optlen); | |
853 | ||
1da177e4 LT |
854 | if (get_user(len, optlen)) |
855 | return -EFAULT; | |
856 | switch (optname) { | |
857 | case IPV6_ADDRFORM: | |
858 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 859 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 LT |
860 | sk->sk_protocol != IPPROTO_TCP) |
861 | return -EINVAL; | |
862 | if (sk->sk_state != TCP_ESTABLISHED) | |
863 | return -ENOTCONN; | |
864 | val = sk->sk_family; | |
865 | break; | |
866 | case MCAST_MSFILTER: | |
867 | { | |
868 | struct group_filter gsf; | |
869 | int err; | |
870 | ||
871 | if (len < GROUP_FILTER_SIZE(0)) | |
872 | return -EINVAL; | |
873 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
874 | return -EFAULT; | |
875 | lock_sock(sk); | |
876 | err = ip6_mc_msfget(sk, &gsf, | |
877 | (struct group_filter __user *)optval, optlen); | |
878 | release_sock(sk); | |
879 | return err; | |
880 | } | |
881 | ||
333fad53 | 882 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
883 | { |
884 | struct msghdr msg; | |
885 | struct sk_buff *skb; | |
886 | ||
887 | if (sk->sk_type != SOCK_STREAM) | |
888 | return -ENOPROTOOPT; | |
889 | ||
890 | msg.msg_control = optval; | |
891 | msg.msg_controllen = len; | |
892 | msg.msg_flags = 0; | |
893 | ||
894 | lock_sock(sk); | |
895 | skb = np->pktoptions; | |
896 | if (skb) | |
897 | atomic_inc(&skb->users); | |
898 | release_sock(sk); | |
899 | ||
900 | if (skb) { | |
901 | int err = datagram_recv_ctl(sk, &msg, skb); | |
902 | kfree_skb(skb); | |
903 | if (err) | |
904 | return err; | |
905 | } else { | |
906 | if (np->rxopt.bits.rxinfo) { | |
907 | struct in6_pktinfo src_info; | |
908 | src_info.ipi6_ifindex = np->mcast_oif; | |
909 | ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); | |
910 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); | |
911 | } | |
912 | if (np->rxopt.bits.rxhlim) { | |
913 | int hlim = np->mcast_hops; | |
914 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
915 | } | |
333fad53 YH |
916 | if (np->rxopt.bits.rxoinfo) { |
917 | struct in6_pktinfo src_info; | |
918 | src_info.ipi6_ifindex = np->mcast_oif; | |
919 | ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); | |
920 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); | |
921 | } | |
922 | if (np->rxopt.bits.rxohlim) { | |
923 | int hlim = np->mcast_hops; | |
924 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
925 | } | |
1da177e4 LT |
926 | } |
927 | len -= msg.msg_controllen; | |
928 | return put_user(len, optlen); | |
929 | } | |
930 | case IPV6_MTU: | |
931 | { | |
932 | struct dst_entry *dst; | |
1ab1457c | 933 | val = 0; |
1da177e4 LT |
934 | lock_sock(sk); |
935 | dst = sk_dst_get(sk); | |
936 | if (dst) { | |
937 | val = dst_mtu(dst); | |
938 | dst_release(dst); | |
939 | } | |
940 | release_sock(sk); | |
941 | if (!val) | |
942 | return -ENOTCONN; | |
943 | break; | |
944 | } | |
945 | ||
946 | case IPV6_V6ONLY: | |
947 | val = np->ipv6only; | |
948 | break; | |
949 | ||
333fad53 | 950 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
951 | val = np->rxopt.bits.rxinfo; |
952 | break; | |
953 | ||
333fad53 YH |
954 | case IPV6_2292PKTINFO: |
955 | val = np->rxopt.bits.rxoinfo; | |
956 | break; | |
957 | ||
958 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
959 | val = np->rxopt.bits.rxhlim; |
960 | break; | |
961 | ||
333fad53 YH |
962 | case IPV6_2292HOPLIMIT: |
963 | val = np->rxopt.bits.rxohlim; | |
964 | break; | |
965 | ||
966 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
967 | val = np->rxopt.bits.srcrt; |
968 | break; | |
969 | ||
333fad53 YH |
970 | case IPV6_2292RTHDR: |
971 | val = np->rxopt.bits.osrcrt; | |
972 | break; | |
973 | ||
1da177e4 | 974 | case IPV6_HOPOPTS: |
333fad53 YH |
975 | case IPV6_RTHDRDSTOPTS: |
976 | case IPV6_RTHDR: | |
977 | case IPV6_DSTOPTS: | |
978 | { | |
979 | ||
980 | lock_sock(sk); | |
28693079 | 981 | len = ipv6_getsockopt_sticky(sk, np->opt, |
4c6510a7 | 982 | optname, optval, len); |
333fad53 | 983 | release_sock(sk); |
05335c22 YH |
984 | /* check if ipv6_getsockopt_sticky() returns err code */ |
985 | if (len < 0) | |
986 | return len; | |
333fad53 YH |
987 | return put_user(len, optlen); |
988 | } | |
989 | ||
990 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
991 | val = np->rxopt.bits.hopopts; |
992 | break; | |
993 | ||
333fad53 YH |
994 | case IPV6_2292HOPOPTS: |
995 | val = np->rxopt.bits.ohopopts; | |
996 | break; | |
997 | ||
998 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
999 | val = np->rxopt.bits.dstopts; |
1000 | break; | |
1001 | ||
333fad53 YH |
1002 | case IPV6_2292DSTOPTS: |
1003 | val = np->rxopt.bits.odstopts; | |
1004 | break; | |
1005 | ||
41a1f8ea YH |
1006 | case IPV6_TCLASS: |
1007 | val = np->tclass; | |
d0ee011f RDC |
1008 | if (val < 0) |
1009 | val = 0; | |
41a1f8ea YH |
1010 | break; |
1011 | ||
1012 | case IPV6_RECVTCLASS: | |
1013 | val = np->rxopt.bits.rxtclass; | |
1014 | break; | |
1015 | ||
1da177e4 LT |
1016 | case IPV6_FLOWINFO: |
1017 | val = np->rxopt.bits.rxflow; | |
1018 | break; | |
1019 | ||
1020 | case IPV6_UNICAST_HOPS: | |
1da177e4 | 1021 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
1022 | { |
1023 | struct dst_entry *dst; | |
1024 | ||
1025 | if (optname == IPV6_UNICAST_HOPS) | |
1026 | val = np->hop_limit; | |
1027 | else | |
1028 | val = np->mcast_hops; | |
1029 | ||
1030 | dst = sk_dst_get(sk); | |
1031 | if (dst) { | |
1032 | if (val < 0) | |
6b75d090 | 1033 | val = ip6_dst_hoplimit(dst); |
befffe90 BH |
1034 | dst_release(dst); |
1035 | } | |
1036 | if (val < 0) | |
1037 | val = ipv6_devconf.hop_limit; | |
1da177e4 | 1038 | break; |
befffe90 | 1039 | } |
1da177e4 LT |
1040 | |
1041 | case IPV6_MULTICAST_LOOP: | |
1042 | val = np->mc_loop; | |
1043 | break; | |
1044 | ||
1045 | case IPV6_MULTICAST_IF: | |
1046 | val = np->mcast_oif; | |
1047 | break; | |
1048 | ||
1049 | case IPV6_MTU_DISCOVER: | |
1050 | val = np->pmtudisc; | |
1051 | break; | |
1052 | ||
1053 | case IPV6_RECVERR: | |
1054 | val = np->recverr; | |
1055 | break; | |
1056 | ||
1057 | case IPV6_FLOWINFO_SEND: | |
1058 | val = np->sndflow; | |
1059 | break; | |
1060 | ||
7cbca67c YH |
1061 | case IPV6_ADDR_PREFERENCES: |
1062 | val = 0; | |
1063 | ||
1064 | if (np->srcprefs & IPV6_PREFER_SRC_TMP) | |
1065 | val |= IPV6_PREFER_SRC_TMP; | |
1066 | else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) | |
1067 | val |= IPV6_PREFER_SRC_PUBLIC; | |
1068 | else { | |
1069 | /* XXX: should we return system default? */ | |
1070 | val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; | |
1071 | } | |
1072 | ||
1073 | if (np->srcprefs & IPV6_PREFER_SRC_COA) | |
1074 | val |= IPV6_PREFER_SRC_COA; | |
1075 | else | |
1076 | val |= IPV6_PREFER_SRC_HOME; | |
1077 | break; | |
1078 | ||
1da177e4 | 1079 | default: |
cf6fc4a9 | 1080 | return -ENOPROTOOPT; |
1da177e4 LT |
1081 | } |
1082 | len = min_t(unsigned int, sizeof(int), len); | |
1083 | if(put_user(len, optlen)) | |
1084 | return -EFAULT; | |
1085 | if(copy_to_user(optval,&val,len)) | |
1086 | return -EFAULT; | |
1087 | return 0; | |
1088 | } | |
1089 | ||
3fdadf7d DM |
1090 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1091 | char __user *optval, int __user *optlen) | |
1092 | { | |
1093 | int err; | |
1094 | ||
1095 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1096 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1097 | ||
1098 | if(level != SOL_IPV6) | |
1099 | return -ENOPROTOOPT; | |
1100 | ||
1101 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); | |
1102 | #ifdef CONFIG_NETFILTER | |
cf6fc4a9 WY |
1103 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1104 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1105 | int len; |
1106 | ||
1107 | if (get_user(len, optlen)) | |
1108 | return -EFAULT; | |
1109 | ||
1110 | lock_sock(sk); | |
1111 | err = nf_getsockopt(sk, PF_INET6, optname, optval, | |
1112 | &len); | |
1113 | release_sock(sk); | |
1114 | if (err >= 0) | |
1115 | err = put_user(len, optlen); | |
1116 | } | |
1117 | #endif | |
1118 | return err; | |
1119 | } | |
1120 | ||
7159039a YH |
1121 | EXPORT_SYMBOL(ipv6_getsockopt); |
1122 | ||
3fdadf7d DM |
1123 | #ifdef CONFIG_COMPAT |
1124 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1125 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1126 | { |
1127 | int err; | |
1128 | ||
1129 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1130 | if (udp_prot.compat_getsockopt != NULL) |
1131 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1132 | optval, optlen); | |
1133 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1134 | } |
1135 | ||
543d9cfe | 1136 | if (level != SOL_IPV6) |
3fdadf7d DM |
1137 | return -ENOPROTOOPT; |
1138 | ||
80991790 PE |
1139 | if (optname == MCAST_MSFILTER) |
1140 | return compat_mc_getsockopt(sk, level, optname, optval, optlen, | |
1141 | ipv6_getsockopt); | |
1142 | ||
3fdadf7d DM |
1143 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); |
1144 | #ifdef CONFIG_NETFILTER | |
cf6fc4a9 WY |
1145 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1146 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1147 | int len; |
1148 | ||
1149 | if (get_user(len, optlen)) | |
1150 | return -EFAULT; | |
1151 | ||
1152 | lock_sock(sk); | |
543d9cfe ACM |
1153 | err = compat_nf_getsockopt(sk, PF_INET6, |
1154 | optname, optval, &len); | |
3fdadf7d DM |
1155 | release_sock(sk); |
1156 | if (err >= 0) | |
1157 | err = put_user(len, optlen); | |
1158 | } | |
1159 | #endif | |
1160 | return err; | |
1161 | } | |
543d9cfe ACM |
1162 | |
1163 | EXPORT_SYMBOL(compat_ipv6_getsockopt); | |
3fdadf7d DM |
1164 | #endif |
1165 |